A noise-reducing washing machine drainage pump and noise-reducing method thereof

Abstract

The present invention discloses a noise-reducing washing machine drain pump and a noise-reducing method thereof, comprising a drain motor, a pump body assembly and an axial plunger type drainer, wherein a water inlet pipe, a water inlet cavity, an edge of a push-pull plate, a water hole and a drain cavity, an opened flexible one-way valve I, a drain pipe and a drain pipeline constitute a full-load drainage path; the drain pipeline, pipe IV, connecting pipe I, pipe II and the water inlet cavity constitute a reflux water path; the edge of the push-pull plate, one side of a baffle, pipe II, connecting pipe I, pipe IV and the drain pipeline constitute an exhaust path; the drain cavity, the drain pipe, pipe III, connecting pipe II, an opened flexible one-way valve II, the water inlet cavity, the water hole and the drain cavity constitute an internal circulation drainage path, and a noise-reducing washing machine drain pump using the above four paths effectively eliminates or reduces the impact noise of residual water in the drain pipeline and the roaring sound of air in the pump body assembly cavity in the prior art through the steps in the noise reduction method of the present invention.

Description

Technical Field

[0001] The present invention relates to the technical field of washing machine drainage pumps, and in particular to a noise-reducing washing machine drainage pump and a noise-reducing method thereof. Background Art

[0002] The existing drainage pump structure includes a drainage motor and a pump body assembly. The drainage motor is provided with an impeller, and the pump body assembly is provided with a drainage chamber and a drainage pipe. The impeller is placed in the drainage chamber. On the one hand, when the drainage pump is fully loaded and there is not much water left in the drainage chamber, that is, when the residual water is discharged in a half-water and half-air (half-load) state, because it is not a vacuum pump, this upper drainage pump with a certain head cannot discharge all the remaining residual water to the outside through the drainage pipe. About one cup of residual water, driven by the high-speed rotation of the impeller, moves in the drainage pipe like a carp jumping over a dragon gate and can never jump over it. The residual water generates a large amount of impact noise in the drainage pipe. On the other hand, in the cavity of the pump body assembly, due to the mixing of water and gas, the air in the cavity of the pump body assembly will generate a loud roaring sound under the drive of the high-speed rotation of the impeller. The impact noise of the residual water in the drainage pipe and the roaring sound of the air in the cavity of the pump body assembly seriously affect the user experience.

[0003] Therefore, there is an urgent need to provide a washing machine drain pump that can solve these two aspects of noise at the same time. Summary of the invention

[0004] In view of the above-mentioned problems existing in the prior art, the present invention provides a noise-reducing washing machine drain pump and a noise reduction method thereof, which can reduce the impact noise of residual water in the drain pipe and the roar of air in the pump assembly cavity at the same time through a reasonable drain pump noise reduction structure and effective noise reduction steps.

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

[0006] A noise-reducing washing machine drainage pump, comprising:

[0007] A drainage motor, the drainage motor comprising a stator, a rotor, an impeller and a power connection terminal I, the impeller having a high head speed and a low head speed;

[0008] A pump body assembly, the pump body assembly comprising a pump body, a flexible one-way valve I, a flexible one-way valve II, a drainage pipe, a connecting pipe I and a connecting pipe II, the pump body having a water inlet chamber, a drainage chamber and a partition installed between the water inlet chamber and the drainage chamber, the partition being provided with a water through hole, the water through hole being used to connect the water inlet chamber with the drainage chamber, the side wall of the water inlet chamber having a water inlet pipe, a pipe I and a pipe II, the side wall of the drainage chamber having a drainage pipe, the side wall of the drainage pipe having a pipe III, the side wall of the drainage pipe having a pipe IV and an outlet, the outlet being connected to the drainage pipe, and one end of the drainage pipe close to the outlet being provided with a sleeve The flexible one-way valve I is arranged on the outer wall of the drain pipe, and is arranged at the top of the drain pipe and between the pipe IV and the pipe III. The flexible one-way valve II is arranged in the pipe I. One end of the connecting pipe I is installed on the outer wall of the pipe II, and the other end of the connecting pipe I is installed on the outer wall of the pipe IV. One end of the connecting pipe II is installed on the outer wall of the pipe I, and the other end of the connecting pipe II is installed on the outer wall of the pipe III. One end of the water inlet cavity of the pump body has a stopper, and the inner wall of the stopper has a tooth I, wherein the flexible one-way valve I can close the pipe IV while opening the drain pipe;

[0009] An axial plunger type emptyer, the axial plunger type emptyer includes a shell, a skeleton, an electromagnetic coil, a magnetic conductor, a front spring, a rear spring, a plunger, a power terminal II, an insulating layer, a sealing gasket and a push-pull disk, the shell has a handle, a blind hole inside the handle, a barrel body, a tooth II on the outer circular wall of the barrel body, a accommodating cavity, a baffle, a through hole, a baffle and a sealing groove, the handle and the baffle are placed at the bottom of the barrel body, one end of the blind hole opening is connected to the bottom of the accommodating cavity, the through hole passes through the bottom of the accommodating cavity to the enclosure, the baffle is placed on the outer side wall of the accommodating cavity, the sealing groove is placed between the barrel body and the outer side wall of the accommodating cavity close to the barrel body, the skeleton has a sleeve and a side plate, the electric The magnetic coil is wound on the outer wall of the sleeve, the magnetic conductor is placed between the inner wall surface of the accommodating cavity and the electromagnetic coil, the front spring is placed in the sleeve, one end of the plunger is placed in the sleeve, and the other end extends out of the sleeve, the rear spring is placed in the blind hole, the installation space of the blind hole in the handle is effectively utilized, and the volume of the axial plunger type emptyer can be reduced as a whole, one end of the power terminal II is connected to the electromagnetic coil through the side plate, and the other end passes through the through hole and extends into the enclosure, the insulating layer is sealed at the opening of the accommodating cavity, and has a waterproof effect, the sealing gasket is placed in the sealing groove, and the end of the plunger extending out of the sleeve is fixedly connected to the push-pull disk;

[0010] Among them, the impeller is placed in the drainage chamber, the axial piston drainer is screwed into the water inlet chamber through the stop, the tooth I on the inner wall of the stop is meshed with the tooth II on the outer circular wall of the barrel body, through the meshing of teeth I and teeth II, the tube II is located between the baffle and the flexible one-way valve II, the push-pull plate is located between the partition and the baffle, the axial piston drainer is reliably fixed in the water inlet chamber, and it is convenient for the push-pull plate to exhaust the air to the tube II. When the axial piston drainer needs to be repaired or replaced, the axial piston drainer can be easily unscrewed by the handle for repair or replacement, the external power supply connector is inserted into the enclosure and electrically connected to the power supply terminal II, and the enclosure protects the junction of the electrical connection between the two.

[0011] Preferably, an arc-shaped stopper is provided on the top of the drain pipe, a positioning groove is provided below the arc-shaped stopper, a support platform is provided at the outlet of the drain pipe, the flexible one-way valve I has a disc, an arc-shaped positioning platform is provided on the side wall of the disc, a positioning hole is opened on the arc-shaped positioning platform, the disc is provided with an arc-shaped through groove near the positioning hole, the disc is provided with a truncated cone concentric with the disc on one side of the arc-shaped through groove, the positioning hole passes through the arc-shaped stopper and is sleeved in the positioning groove, the arc-shaped through groove and the truncated cone face the outlet direction of the drain pipe, the bottom edge of the disc is fitted with the support platform, the arc-shaped stopper is concentric with the drain pipe, and the radius of the arc-shaped stopper does not exceed the radius of the drain pipe;

[0012] Preferably, the flexible one-way valve II has a sleeve, the upper end of the sleeve is provided with a brim, one side of the lower end of the sleeve is provided with an arc-shaped curved wall I, the other side of the lower end of the sleeve is provided with an arc-shaped curved wall II, the arc-shaped curved wall I is provided with a protrusion I near the axis of the sleeve, the arc-shaped curved wall II is provided with a protrusion II near the axis of the sleeve, a gap is provided between the protrusion I and the protrusion II, the connecting pipe II has a positioning surface, the brim faces the lower end surface of the sleeve and fits the end surface of the pipe I, the positioning surface is crimped on the other end surface of the brim, so that the flexible one-way valve II is fixed in the connecting pipe II and the pipe I, when the connecting pipe II is subjected to hydraulic impact in the direction of the flexible one-way valve II, the arc-shaped curved wall I and the arc-shaped curved wall II are plastically deformed and bent toward the outer side of the sleeve, driving the protrusion I and the protrusion II to open to both sides respectively, and the connecting pipe II and the water inlet cavity are connected;

[0013] Preferably, the push-pull disk has an inner push plate, a fixed tube and a through hole are arranged in the axial direction of the inner push plate, the number of the through holes is not less than two, a retaining ring is arranged at the outer edge of the through hole, a conical outer push plate is arranged on the outer side of the retaining ring, the fixed tube is interference fit with one end of the plunger, the axis of the push-pull disk coincides with the axis of the water inlet cavity, the retaining ring faces the water hole, and the outer push plate faces the partition;

[0014] Preferably, the outer wall of the sealing gasket is interference-fitted with the inner wall of the stopper, a rubber cap is provided between the push-pull disk and the insulating layer, the inner wall surface of the rubber cap is sleeved on the outer wall surface of the sleeve, the center hole of the rubber cap passes through one end of the plunger, and is sleeved on one end of the plunger;

[0015] Preferably, the center lines of the water inlet cavity, the drainage cavity, the drainage pipe, the tube IV, the tube I and the tube II are all arranged in the same plane, the center lines of the water inlet cavity and the drainage cavity coincide, the center lines of the drainage pipe, the tube I and the tube II are all perpendicular to the center line of the water inlet cavity, so that it is convenient to make the mold of the pump body, and the engineering plastic is integrally injection molded on the same mold at one time, which can simplify the process, reduce costs and improve production efficiency. The angle β between the center line of the tube IV and the center line of the drainage pipe is between 60° and 70°, and the inner diameter of the tube IV is between 0.1 and 0.3 times the inner diameter of the drainage pipe, so that the pressure of the outlet is reduced, and the speed of the water flow through the tube IV is slowed down to reduce noise, ensuring the drainage flow discharged to the outside through the drainage pipe and the drainage pipeline;

[0016] Preferably, the drainage motor is a three-phase permanent magnet synchronous motor, the high-lift speed of the impeller is between 3000 and 3600 revolutions per minute, the low-lift speed of the impeller is between 1000 and 1500 revolutions per minute, and the reciprocating push-pull motion of the push-pull disk of the axial plunger type drainer is between 30 and 60 times per minute, wherein pushing forward and pulling backward is one cycle, i.e., one reciprocating push-pull motion;

[0017] Preferably, the flexible one-way valve I, the flexible one-way valve II, the drainage pipe, the connecting pipe I, the connecting pipe II and the sealing gasket are all made of rubber;

[0018] Preferably, the shell, the frame and the push-pull plate are all made of engineering plastics, the blind hole and the sleeve are coaxially arranged, and the front spring and the rear spring are both made of stainless steel wire.

[0019] The present invention also relates to a noise reduction method for a noise-reducing washing machine drainage pump. The noise reduction method adopts the noise-reducing washing machine drainage pump, and comprises the following steps:

[0020] Step 1: When the drainage pump is fully loaded, water starts to drain. Water flows through the water inlet pipe, the water inlet cavity connected to the water inlet pipe, the edge of the push-pull plate, the water hole and the drainage cavity in sequence. The impeller accommodated in the drainage cavity rotates at a high head speed. The flexible one-way valve I turns toward the outlet, the drainage pipe is opened, and the pipe IV is closed at the same time. Water flows through the drainage pipe and the drainage pipeline to be discharged, and the full-load drainage is completed.

[0021] Step 2, the impeller stops draining water, the flexible one-way valve I falls back to the drain pipe, the drain pipe is closed, and the pipe IV is opened at the same time. The reflux water in the drain pipe passes through the pipe IV, the connecting pipe I, the pipe II and the water inlet cavity in sequence, and merges with the residual water in the water inlet cavity;

[0022] Step 3, the axial plunger type evacuator works, the push-pull disk performs reciprocating push-pull motion in the water inlet chamber, the flexible one-way valve II is closed, and the gas suspended above the water in the water inlet chamber is discharged along the edge of the push-pull disk through one side of the baffle, pipe II, connecting pipe I, pipe IV and the drainage pipe in sequence, and the exhaust is completed;

[0023] Step 4, the axial plunger type emptyer stops working, the impeller contained in the drainage chamber rotates at a low head speed, the flexible one-way valve II opens, and the water flows through the drainage chamber, the drainage pipe, the pipe III, the connecting pipe II, the flexible one-way valve II, the water inlet chamber and the water hole in sequence, and then returns to the drainage chamber to form an internal circulation drainage;

[0024] Step 5: When the drainage pump is fully loaded in the next cycle, drainage begins, and steps 1 to 4 are repeated.

[0025] The following beneficial effects can be achieved by adopting the noise reduction washing machine drain pump and noise reduction method of the present invention: the water inlet pipe, water inlet cavity, edge of the push-pull plate, water hole and drainage cavity, the opened flexible one-way valve I, the drain pipe and the drainage pipeline constitute a full-load drainage path; the drainage pipeline, pipe IV, connecting pipe I, pipe II and water inlet cavity constitute a reflux water path; the edge of the push-pull plate, one side of the baffle, pipe II, connecting pipe I, pipe IV and the drainage pipeline constitute an exhaust path; the drainage cavity, drain pipe, pipe III, connecting pipe II, the opened flexible one-way valve II, the water inlet cavity, the water hole and the drainage cavity constitute an internal circulation drainage path. A noise reduction washing machine drain pump adopting the above four paths can eliminate the impact noise of residual water in the drainage pipeline and the roar of air in the pump body assembly cavity in the prior art through the effective noise reduction steps of steps 1 to step 5 in the noise reduction method of the present invention, thereby achieving the purpose of eliminating or reducing noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the appearance structure of a noise-reducing washing machine drainage pump of the present invention;

[0027] Figure 2 An exploded view of the present invention;

[0028] Figure 3 It is a schematic diagram of the main structure of the present invention;

[0029] Figure 4 for Figure 3 Sectional view in the AA direction;

[0030] Figure 5 for Figure 4 A partial enlarged view of middle Ⅰ;

[0031] Figure 6 It is a schematic diagram of the main structure of the axial piston type evacuator of the present invention;

[0032] Figure 7 for Figure 6 Left view of

[0033] Figure 8 for Figure 6 Cross-sectional view in the BB direction;

[0034] Fig. 9 It is a structural schematic diagram of the housing in the present invention;

[0035] Fig.10 It is a schematic diagram of the structure of the push-pull tray in the present invention;

[0036] Fig.11 It is a schematic diagram of the structure of the pump body in the present invention;

[0037] Fig.12 for Fig.11 A partial enlarged view of middle Ⅱ;

[0038] Fig.13 Another schematic diagram of the structure of the pump body in the present invention;

[0039] Fig.14 It is a structural schematic diagram of the flexible one-way valve I in the present invention;

[0040] Fig.15 It is a structural schematic diagram of the flexible one-way valve II in the present invention;

[0041] Fig.16 It is a structural schematic diagram of the connecting pipe II in the present invention;

[0042] Fig.17 It is a schematic diagram of the working condition of step 1 in a noise reduction method for a washing machine drainage pump of the present invention;

[0043] Fig.18 It is a schematic diagram of the working condition of step 2 in a noise reduction method for a washing machine drainage pump of the present invention;

[0044] Fig.19 It is a schematic diagram of the working condition of step 3 in a noise reduction method for a washing machine drainage pump of the present invention;

[0045] Fig. 20 It is a schematic diagram of the working condition of step 4 in a noise reduction method for a washing machine drainage pump of the present invention;

[0046] Fig.21 A schematic diagram of the steps of a noise reduction method for a washing machine drainage pump of the present invention. DETAILED DESCRIPTION

[0047] The technical solution of the present invention is further described below in conjunction with the accompanying drawings.

[0048] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0049] It should be noted that the terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, apparatus, product or equipment comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or equipment.

[0050] Embodiment 1:

[0051] A noise-reducing washing machine drain pump, such as Figures 1 to 3 As shown, it includes a drainage motor 1, a pump body assembly 2 and an axial piston drainer 3.

[0052] like Figure 4 As shown, the drainage motor 1 includes a stator 11, a rotor 12, an impeller 13 and a power terminal Ⅰ14, wherein the stator 11 is sleeved on the rotor 12, the power terminal Ⅰ14 is electrically connected to an external power supply, and the impeller 13 has a high head speed and a low head speed, the high head speed is between 3000 and 3600 revolutions per minute, and the low head speed is between 1000 and 1500 revolutions per minute;

[0053] like Figure 2 and Figure 4 As shown, the pump body assembly 2 includes a pump body 21, a flexible one-way valve I 22, a flexible one-way valve II 23, a drainage pipe 24, a connecting pipe I 25 and a connecting pipe II 26. The pump body 21 has a water inlet chamber 211, a drainage chamber 212 and a partition 213 installed between the water inlet chamber 211 and the drainage chamber 212. The partition 213 is provided with a water hole 214, and the water hole 214 is used to connect the water inlet chamber 211 with the drainage chamber 212. The side wall of the water inlet chamber 211 has a water inlet pipe 215, a pipe I 216 and a pipe II 217. The side wall of the drainage chamber 212 has a drainage pipe 218. The side wall of the drainage pipe 218 has a pipe III 219. The side wall of the drainage pipe 24 has a pipe IV 241 and an outlet 242. The outlet 242 is communicated with the drainage pipe 24. One end of the drainage pipe 24 close to the outlet 242 is sleeved on the outer wall of the drainage pipe 218. The flexible one-way valve I22 is arranged at the top of the drainage pipe 218 and between the pipe IV241 and the pipe III219. The flexible one-way valve II23 is arranged in the pipe I216. One end of the connecting pipe I25 is installed on the outer wall of the pipe II217, and the other end of the connecting pipe I25 is installed on the outer wall of the pipe IV241. One end of the connecting pipe II26 is installed on the outer wall of the pipe I216, and the other end of the connecting pipe II26 is installed on the outer wall of the pipe III219. One end of the water inlet chamber 211 of the pump body 21 has a stop 2110, and the inner wall of the stop 2110 has a tooth I2111.

[0054] like Figures 6 to 9 As shown, the axial plunger type evacuator 3 includes a housing 31, a frame 32, an electromagnetic coil 33, a magnetic conductor 34, a front spring 35, a rear spring 36, a plunger 37, a power terminal II 38, an insulating layer 39, a sealing gasket 3101 and a push-pull plate 3102. Fig. 9 As shown, the housing 31 has a handle 311, a blind hole 312 inside the handle 311, a barrel body 313, a tooth II 314 on the outer wall of the barrel body 313, a receiving chamber 315, a baffle 316, a through hole 317, a baffle 318 and a sealing groove 319. The handle 311 and the baffle 316 are placed at the bottom of the barrel body 313, one end of the blind hole 312 is connected to the bottom of the receiving chamber 315, the through hole 317 runs through the bottom of the receiving chamber 315 to the baffle 316, the baffle 318 is placed on the outer wall of the receiving chamber 315, and the sealing groove 319 is placed between the barrel body 313 and the outer wall of the receiving chamber 315 close to the barrel body 313, as shown in FIG. Figure 8As shown, the skeleton 32 has a sleeve 321 and a side plate 322, the electromagnetic coil 33 is wound on the outer wall of the sleeve 321, the magnetic conductor 34 is placed between the inner wall surface of the accommodating cavity 315 and the electromagnetic coil 33, the front spring 35 is placed in the sleeve 321, one end of the plunger 37 is placed in the sleeve 321, and the other end extends out of the sleeve 321, the rear spring 36 is placed in the blind hole 312, one end of the power terminal II 38 is electrically connected to the electromagnetic coil 33 through the side plate 322, and the other end passes through the through hole 317 and extends into the enclosure 316, the insulating layer 39 is sealed at the opening of the accommodating cavity 315 in a glue-filled manner, the sealing gasket 3101 is placed in the sealing groove 319, and one end of the plunger 37 extending out of the sleeve 321 is fixedly connected to the push-pull disk 3102;

[0055] like Figure 4 and Figure 8 As shown, the impeller 13 is placed in the water discharge chamber 212, and the axial piston type emptying device 3 is screwed into the water inlet chamber 211 through the stop 2110, and the teeth Ⅰ2111 on the inner wall of the stop 2110 are meshed with the teeth Ⅱ314 on the outer circular wall of the barrel body 313, and the tube Ⅱ217 is located between the baffle 318 and the flexible one-way valve Ⅱ23, and the push-pull plate 3102 is located between the partition 213 and the baffle 318. Therefore, the axial piston type emptying device 3 is reliably fixed in the water inlet chamber 211 after being combined with the pump body assembly 2, and it is convenient for the push-pull plate 3102 to exhaust the air to the tube Ⅱ217. When the axial piston type emptying device 3 needs to be repaired or replaced, the axial piston type emptying device 3 can be easily screwed out by the handle 311 for repair or replacement, and the external power supply connector is inserted into the enclosure 316 and electrically connected to the power supply terminal Ⅱ38. The enclosure 316 protects the joint of the electrical connection between the two.

[0056] In this embodiment 1, Figure 5 , Fig.12 , Fig.14 and Fig.17As shown, an arc-shaped stopper 2112 is provided on the top of the drain pipe 218, a positioning groove 2113 is provided below the arc-shaped stopper 2112, a support platform 2114 is provided at the outlet of the drain pipe 218, and the flexible one-way valve I22 has a disc 221, and an arc-shaped positioning platform 222 is provided on the side wall of the disc 221, and a positioning hole 223 is opened on the arc-shaped positioning platform 222. The disc 221 is provided with an arc-shaped through groove 224 near the positioning hole 223, and the disc 221 is provided with a round table 225 concentric with the disc 221 on one side of the arc-shaped through groove 224. The positioning hole 223 passes through the arc-shaped stopper 2112 and is sleeved in the positioning groove 2113, so as to complete the fixation of the flexible one-way valve I22, and the arc-shaped through groove 224 and the round table 225 face the drain pipe. In the outlet direction of drain pipe 218, the bottom edge of disc 221 fits with support platform 2114, the arc-shaped stopper 2112 is concentric with drain pipe 218, and the radius of arc-shaped stopper 2112 does not exceed the radius of drain pipe 218, so that the inner wall of drain pipe 24 can be tightly attached to the outer wall of drain pipe 218, and form an interference fit to prevent leakage caused by gap between the two. When the drain pipe 218 is subjected to hydraulic impact, the bottom surface of disc 221 is forced to leave support platform 2114 and flip upward through the bending function of arc-shaped through groove 224 in the outlet direction of drain pipe 218. The round table 225 blocks the outlet 242 of pipe IV 241. At the same time, the outlet of drain pipe 218 is opened, and water flows to the outside through the drain pipe 24.

[0057] In this embodiment 1, Fig.15 , Fig.16 and Fig. 20 As shown, the flexible one-way valve II 23 has a sleeve 231, a brim 232 is provided at the upper end of the sleeve 231, an arc-shaped curved wall I 233 is provided on one side of the lower end of the sleeve 231, and an arc-shaped curved wall II 234 is provided on the other side of the lower end of the sleeve 231. The arc-shaped curved wall I 233 is provided with a protrusion I 235 near the axis of the sleeve 231, and the arc-shaped curved wall II 234 is provided with a protrusion II 236 near the axis of the sleeve 231. There is a gap 237 between the protrusion I 235 and the protrusion II 236, and the connecting pipe II 26 has a positioning surface 261. The lower end face of the brim 232 facing the sleeve 231 fits with the end face of the tube I 216, and the positioning face 261 is crimped onto the other end face of the brim 232, so that the flexible one-way valve II 23 is fixed in the connecting tube II 26 and the tube I 216. When the connecting tube II 26 is subjected to hydraulic impact in the direction of the flexible one-way valve II 23, the arcuate curved wall I 233 and the arcuate curved wall II 234 are plastically deformed and bend toward the outside of the sleeve 231, driving the protrusion I 235 and the protrusion II 236 to open to both sides respectively, and the connecting tube II 26 and the water inlet chamber 211 are connected.

[0058] In this embodiment 1, Fig.10 and Fig.19As shown, the push-pull disk 3102 has an inner push plate 31021, and the inner push plate 31021 is provided with a fixed tube 31022 and a hole 31023 in the axial direction. The number of holes 31023 is not less than two, and the optimal number is four, and they are evenly distributed on the inner push plate 31021 around the axis of the push-pull disk 3102. When the push-pull disk 3102 reciprocates, the impact of the water flow on the inner push plate 31021 can be slowed down, so that it can perform axial reciprocating motion smoothly. The outer edge of the hole 31023 is provided with a retaining ring 31024, and the outer side of the retaining ring 31024 is provided with a conical outer push plate 31025. The fixed tube 31022 is interference fit with one end of the plunger 37, and the axis of the push-pull disk 3102 The line coincides with the axis of the water inlet chamber 211, and the retaining ring 31024 faces the water through hole 214, so that the water in the retaining ring 31024 can be pushed into the drainage chamber 212 through the water through hole 214, and the outer push plate 31025 faces the partition 213. The conical surface of the outer push plate 31025 can squeeze the gas suspended above the water in the water inlet chamber 211 toward the partition 213, and the airflow flows into the tube II 217 through the conical surface of the push-pull plate 3102, and the flexible one-way valve II 23 is closed by the squeezing of the airflow, and the airflow is discharged through the connecting pipe I 25, the tube IV 241 and the drainage pipe 24, wherein the reciprocating push-pull motion of the push-pull plate 3102 is between 30 and 60 times per minute, and the preferred number is 50 times per minute.

[0059] In this embodiment 1, Figure 4 and Figure 8 As shown, the outer wall of the sealing gasket 3101 is interference fit with the inner wall of the stop 2110 to prevent the water flow or gas in the water inlet chamber 211 from leaking to the outside of the pump body 21 through the gap formed by the meshing of the tooth I 2111 and the tooth II 314. A rubber cap 3103 is arranged between the push-pull plate 3102 and the insulating layer 39. The inner wall surface of the rubber cap 3103 is sleeved on the outer wall surface of the sleeve 321. The center hole of the rubber cap 3103 passes through one end of the plunger 37 and is sleeved on one end of the plunger 37.

[0060] In this embodiment 1, Figure 4 , Fig.11 and Fig.13 As shown, the center line O of the water inlet cavity 211 and the water outlet cavity 212 1 , the center line O of the drain pipe 218 2 、Center line O of tube IV241 3 、Center line O of tube Ⅰ216 4 and the center line O of tube Ⅱ 217 5 are arranged in the same plane, the center line O of the drain pipe 218 2 、Center line O of tube Ⅰ216 4 and the center line O of tube Ⅱ 217 5 are all aligned with the center line O of the water inlet chamber 211 1vertical, which is convenient for the mold making of the pump body 21, and the engineering plastic is integrally injection molded in one mold at one time, which can simplify the process, reduce costs and improve production efficiency. The center line O of the pipe IV 241 3 and the center line O of the drain pipe 218 2 The angle β between them is between 60° and 70°, and the inner diameter of pipe IV 241 is between 0.1 and 0.3 times the inner diameter of drain pipe 218. This reduces the pressure at outlet 242 and slows down the speed of water flow through pipe IV 241 to reduce noise, thereby ensuring the drainage flow discharged to the outside through drain pipe 218 and drainage pipe 24.

[0061] In this embodiment 1, the flexible one-way valve I22, the flexible one-way valve II23, the drainage pipe 24, the connecting pipe I25, the connecting pipe II26 and the sealing gasket 3101 are all made of rubber, wherein the flexible one-way valve I22 and the flexible one-way valve II23 adopt rubber material to improve their flexibility and facilitate the opening and closing of the valve, the drainage pipe 24, the connecting pipe I25, the connecting pipe II26 and the sealing gasket 3101 adopt rubber material to improve the sealing effect, the shell 31 and the skeleton 32 are made of engineering plastics, which can improve the insulation performance, the push-pull plate 3102 is made of engineering plastics, which is easy to manufacture and can reduce the cost, the blind hole 312 and the sleeve 321 are coaxially arranged, the front spring 35 and the rear spring 36 are both made of stainless steel wire, which can ensure the coaxiality of the front spring 35 and the rear spring 36, and ensure that they will not rust and affect the spring performance.

[0062] The above-mentioned embodiment 1 is a specific implementation of a noise-reducing washing machine drain pump.

[0063] Embodiment 2:

[0064] A noise reduction method for a washing machine drainage pump, using the noise reduction washing machine drainage pump of the above-mentioned embodiment 1, the noise reduction method comprises the following steps:

[0065] Step 1: Figure 5 and Fig.17 As shown, the drainage pump starts to drain when it is fully loaded, that is, when the water inlet chamber 211 is full of water, Fig.17The direction of the middle arrow is the water inlet direction and the drainage direction. The paths of the full-load water inlet direction and the drainage direction are: the water flows through the water inlet pipe 215, the water inlet chamber 211 connected to the water inlet pipe 215, the edge of the push-pull plate 3102, the water hole 214 and the drainage chamber 212 in sequence. The impeller 13 accommodated in the drainage chamber 212 rotates at a high head speed between 3000 and 3600 revolutions per minute. Under the hydraulic impact in the drainage pipe 218, the bottom surface of the disc 221 on the flexible one-way valve I 22 is forced to leave the support platform 2114 and flip to the outlet 242 of the pipe IV 241 through the arc groove 224. The round table 225 blocks the outlet 242 of the pipe IV 241. At the same time, the outlet of the drainage pipe 218 is opened, and the water flows to the outside through the drainage pipe 24, and the full-load drainage is completed;

[0066] Step 2: Figure 5 and Fig.18 As shown, the impeller 13 stops draining water, the flexible one-way valve I22 falls back to the drain pipe 218, the bottom surface of the disc 221 contacts the support platform 2114, the drain pipe 218 is closed, and the pipe IV 241 is opened. Fig.18 The direction of the middle arrow is the direction of the backflow water. The path of the backflow water in the drainage pipe 24 is: the backflow water passes through the pipe IV 241, the connecting pipe I 25, the pipe II 217 and the water inlet chamber 211 in sequence, and merges with the residual water in the water inlet chamber 211. The water vapor is mixed in the water inlet chamber 211, and the backflow of the residual water in the drainage pipe 24 ends.

[0067] Step 3: Figure 8 , Fig.10 and Fig.19 As shown, the external power supply supplies power to the electromagnetic coil 33 through the power connection terminal II 38, and the reciprocating push-pull motion of the push-pull disk 3102 of the axial plunger type emptying device 3 works between 30 and 60 times per minute, preferably 50 times per minute. Fig.19 The directions of the middle arrows are respectively the direction of movement of the push-pull disk and the direction of exhaust. The push-pull disk 3102 fixed at one end of the plunger 37 moves in the water inlet chamber 211 in an axial reciprocating push-pull motion. The retaining ring 31024 faces the water hole 214, pushing the water in the retaining ring 31024 into the drainage chamber 212 through the water hole 214. The outer push plate 31025 faces the partition 213. The conical surface of the outer push plate 31025 squeezes the gas suspended above the water in the water inlet chamber 211 toward the partition 213. The airflow flows toward the pipe II 217 through the conical surface of the push-pull disk 3102. The flexible one-way valve II 23 is squeezed and closed by the airflow. The path of the exhaust direction is: the gas suspended above the water in the water inlet chamber 211 is discharged along the edge of the push-pull disk 3102 through one side of the baffle 318, pipe II 217, connecting pipe I 25, pipe IV 241 and drainage pipe 24 in sequence, and the exhaust ends.

[0068] Step 4: Fig. 20As shown, the axial plunger type emptying device 3 stops working, and the impeller 13 contained in the drainage chamber 212 rotates at a low head speed between 1000 and 1500 revolutions per minute. Due to insufficient drainage hydraulic force, the flexible one-way valve I 22 closes the drainage pipe 24, and the flexible one-way valve II 23 opens. Fig. 20 The direction of the middle arrow is the inner circulation direction. The path of the inner circulation direction is: the water flows through the drainage chamber 212, the drainage pipe 218, the pipe III 219, the connecting pipe II 26, the opened flexible one-way valve II 23, the water inlet chamber 211 and the water hole 214 in sequence, and then returns to the drainage chamber 212 to form drainage in the inner circulation direction.

[0069] Step 5: Fig.21 As shown, when the drain pump is fully loaded in the next cycle, drainage begins and steps 1 to 4 are repeated.

[0070] In the above steps, the length of the drain pipe 218 can be adjusted according to the actual application. In step 1, the water in the drum of the washing machine continuously supplies water to the water inlet chamber 211 and the drain chamber 212 through the water inlet pipe 215, and the impeller opens the flexible one-way valve I22 at high lift and high speed, and continuously discharges to the outside through the drain pipe 218 and the drain pipe 24. At this time, the drainage noise is relatively soft and stable, and the noise is also relatively low, about 35 decibels to 40 decibels. Therefore, no noise reduction treatment is performed during full load drainage. Step 1 is only an indispensable and important link in the entire noise reduction method; in step 2, at the end of step 1, for the impact noise of the residual water in the drainage pipe in the prior art, this impact noise is about 55 decibels to 60 decibels. Step 2 uses the method of stopping the impeller 13 from draining water, and the flexible one-way valve I22 closes the drain pipe 218. The residual water in the drainage pipe 24 flows back into the water inlet chamber 211, thereby eliminating the impact noise of the residual water in the drainage pipe; in step 3, At the end of step 2, when the impeller in the prior art drains water, the air in the cavity of the pump body assembly will produce a loud roar, which is about 52 decibels to 56 decibels. In order to reduce the noise of the air roar, step 3 uses an axial piston type drainer 3 to discharge the gas suspended above the water in the water inlet chamber 211 to the outside through the drainage pipe 24. Therefore, in step 4, since there is no air in the water inlet chamber 211 and the drainage chamber 212, the impeller opens the flexible one-way valve II 23 at low head and low speed, and the water flows through the connecting pipe II 26 in the internal circulation between the water inlet chamber 211 and the drainage chamber 212 for low-head drainage, thereby eliminating the roar caused by the air in the cavity of the pump body assembly. At this time, the internal circulation low-head drainage noise is about 32 decibels to 36 decibels, which has a significant noise reduction effect compared with the noise of the air roar. In step 5, when the drainage pump is fully loaded in the next cycle, drainage begins, and steps 1 to 4 are repeated to perform noise reduction processing.

[0071] It is understood that the above specific description of the present invention is only used to illustrate the present invention and is not limited to the technical solutions described in the embodiments of the present invention. Those skilled in the art should understand that the present invention can still be modified or replaced by equivalents to achieve the same technical effects; as long as the use requirements are met, they are within the protection scope of the present invention.

Claims

1. A noise-reducing washing machine drainage pump, characterized in that: include: A drainage motor (1), the drainage motor (1) comprising a stator (11), a rotor (12), an impeller (13) and a power connection terminal I (14), the impeller (13) having a high head speed and a low head speed; A pump body assembly (2), the pump body assembly (2) comprising a pump body (21), a flexible one-way valve I (22), a flexible one-way valve II (23), a drainage pipe (24), a connecting pipe I (25) and a connecting pipe II (26), the pump body (21) comprising a water inlet chamber (211), a drainage chamber (212) and a partition plate (213) installed between the water inlet chamber (211) and the drainage chamber (212), the partition plate (213) being provided with a water hole (214), The water hole (214) is used to connect the water inlet chamber (211) with the drainage chamber (212); the side wall of the water inlet chamber (211) has a water inlet pipe (215), a pipe I (216), and a pipe II (217); the side wall of the drainage chamber (212) has a drainage pipe (218); the side wall of the drainage pipe (218) has a pipe III (219); the side wall of the drainage pipe (24) has a pipe IV (241) and an outlet (242); the outlet (242) The flexible one-way valve I (22) is disposed at the top of the drain pipe (218) and between the pipe IV (241) and the pipe III (219). The flexible one-way valve II (23) is disposed in the pipe I (216). One end of the connecting pipe I (25) is installed at the top of the drain pipe (218). The outer wall of the tube II (217), the other end of the connecting tube I (25) is installed on the outer wall of the tube IV (241), one end of the connecting tube II (26) is installed on the outer wall of the tube I (216), the other end of the connecting tube II (26) is installed on the outer wall of the tube III (219), one end of the water inlet chamber (211) of the pump body (21) has a stopper (2110), and the inner wall of the stopper (2110) has a tooth I (2111); An axial plunger type emptyer (3), the axial plunger type emptyer (3) comprising a housing (31), a frame (32), an electromagnetic coil (33), a magnetic conductor (34), a front spring (35), a rear spring (36), a plunger (37), a power connection terminal II (38), an insulating layer (39), a sealing gasket (3101) and a push-pull plate (3102), the housing (31) having a handle (311), a blind hole (312) inside the handle (311), a barrel (313), and teeth II (312) on the outer circular wall of the barrel (313). 14), a accommodating cavity (315), a baffle (316), a through hole (317), a baffle (318) and a sealing groove (319), wherein the handle (311) and the baffle (316) are placed at the bottom of the barrel body (313), one end of the blind hole (312) is connected to the bottom of the accommodating cavity (315), the through hole (317) passes through the bottom of the accommodating cavity (315) to the inside of the baffle (316), the baffle (318) is placed on the outer wall of the accommodating cavity (315), and the sealing groove (319) is placed on the outer wall of the accommodating cavity (315). The frame (32) comprises a sleeve (321) and a side plate (322) between the barrel body (313) and the accommodating chamber (315) close to the outer wall of the barrel body (313); the electromagnetic coil (33) is wound on the outer wall of the sleeve (321); the magnetic conductor (34) is placed between the inner wall surface of the accommodating chamber (315) and the electromagnetic coil (33); the front spring (35) is placed in the sleeve (321); one end of the plunger (37) is placed in the sleeve (321) and the other end extends out of the sleeve (321). 21), the rear spring (36) is placed in the blind hole (312), one end of the power terminal II (38) is connected to the electromagnetic coil (33) through the side plate (322), and the other end passes through the through hole (317) and extends into the enclosure (316), the insulating layer (39) is sealed at the opening of the accommodating cavity (315), the sealing gasket (3101) is placed in the sealing groove (319), and one end of the plunger (37) extending out of the sleeve (321) is fixedly connected to the push-pull disk (3102); The impeller (13) is placed in the drainage chamber (212), the axial plunger drainer (3) is screwed into the water inlet chamber (211) through the stopper (2110), the teeth I (2111) on the inner wall of the stopper (2110) are meshed with the teeth II (314) on the outer wall of the barrel (313), the tube II (217) is located between the baffle (318) and the flexible one-way valve II (23), and the push-pull disc (3102) is located between the partition (213) and the baffle (318).

2. A noise-reducing washing machine drainage pump according to claim 1, characterized in that: The drain pipe (218) is provided with an arc-shaped stopper (2112) at the top, a positioning groove (2113) is provided below the arc-shaped stopper (2112), a support platform (2114) is provided at the outlet of the drain pipe (218), the flexible one-way valve I (22) has a disc (221), a side wall of the disc (221) is provided with an arc-shaped positioning platform (222), a positioning hole (223) is provided on the arc-shaped positioning platform (222), the disc (221) is provided with an arc-shaped through groove (224) near the positioning hole (223), and the disc (221) is provided with a support platform (2114) at the outlet of the drain pipe (218). A truncated cone (225) concentric with the disc (221) is provided on one side of the arc-shaped through groove (224); the positioning hole (223) passes through the arc-shaped stopper (2112) and is sleeved in the positioning groove (2113); the arc-shaped through groove (224) and the truncated cone (225) face the outlet direction of the drain pipe (218); the bottom edge of the disc (221) is in contact with the support platform (2114); the arc-shaped stopper (2112) and the drain pipe (218) are concentric; and the radius of the arc-shaped stopper (2112) does not exceed the radius of the drain pipe (218).

3. A noise-reducing washing machine drain pump according to claim 1, characterized in that: The flexible one-way valve II (23) comprises a sleeve (231), the upper end of the sleeve (231) is provided with a brim (232), one side of the lower end of the sleeve (231) is provided with an arc-shaped curved wall I (233), the other side of the lower end of the sleeve (231) is provided with an arc-shaped curved wall II (234), the arc-shaped curved wall I (233) is provided with a protrusion I (235) at a position close to the axis of the sleeve (231), and the arc-shaped curved wall II (234) is provided with a protrusion I (235). ) A protrusion II (236) is provided near the axial position of the sleeve (231), a gap (237) is provided between the protrusion I (235) and the protrusion II (236), the connecting tube II (26) has a positioning surface (261), the lower end surface of the brim (232) facing the sleeve (231) is in contact with the end surface of the tube I (216), and the positioning surface (261) is crimped onto the other end surface of the brim (232).

4. A noise-reducing washing machine drain pump according to claim 1, characterized in that: The push-pull disk (3102) has an inner push plate (31021), and the inner push plate (31021) is provided with a fixed tube (31022) and a hole (31023) in the axial direction. The number of the holes (31023) is not less than two, and a retaining ring (31024) is provided on the outer edge of the hole (31023). A conical outer push plate (31025) is provided on the outer side of the retaining ring (31024). The fixed tube (31022) is interference fit with one end of the plunger (37). The axis of the push-pull disk (3102) coincides with the axis of the water inlet chamber (211), the retaining ring (31024) faces the water hole (214), and the outer push plate (31025) faces the partition (213).

5. A noise-reducing washing machine drain pump according to claim 1, characterized in that: The outer wall of the sealing gasket (3101) is interference-fitted with the inner wall of the stopper (2110); a rubber cap (3103) is provided between the push-pull disk (3102) and the insulating layer (39); the inner wall surface of the rubber cap (3103) is sleeved on the outer wall surface of the sleeve (321); the center hole of the rubber cap (3103) passes through one end of the plunger (37) and is sleeved on one end of the plunger (37).

6. A noise-reducing washing machine drain pump according to claim 1, characterized in that: The center line of the water inlet chamber (211), the center line of the drainage chamber (212), the center line of the drainage pipe (218), the center line of the pipe IV (241), the center line of the pipe I (216), and the center line of the pipe II (217) are all arranged in the same plane; the center line of the water inlet chamber (211) coincides with the center line of the drainage chamber (212); the center line of the drainage pipe (218), the center line of the pipe I (216), and the center line of the pipe II (217) are all perpendicular to the center line of the water inlet chamber (211); the angle β between the center line of the pipe IV (241) and the center line of the drainage pipe (218) is between 60° and 70°; the inner diameter of the pipe IV (241) is between 0.1 and 0.3 times the inner diameter of the drainage pipe (218); and the pump body (21) is integrally injection molded from engineering plastic.

7. A noise-reducing washing machine drain pump according to claim 1, characterized in that: The drainage motor (1) is a three-phase permanent magnet synchronous motor, the high-lift speed of the impeller (13) is between 3000 and 3600 revolutions per minute, the low-lift speed of the impeller (13) is between 1000 and 1500 revolutions per minute, and the reciprocating push-pull motion of the push-pull disk (3102) of the axial piston drainer (3) is between 30 and 60 times per minute.

8. A noise-reducing washing machine drain pump according to claim 7, characterized in that: The flexible one-way valve I (22), the flexible one-way valve II (23), the drainage pipe (24), the connecting pipe I (25), the connecting pipe II (26) and the sealing gasket (3101) are all made of rubber.

9. A noise-reducing washing machine drain pump according to claim 8, characterized in that: The housing (31), the frame (32) and the push-pull plate (3102) are all made of engineering plastics, the blind hole (312) and the sleeve (321) are coaxially arranged, and the front spring (35) and the rear spring (36) are both made of stainless steel wire.

10. A noise reduction method for a washing machine drainage pump, characterized in that: A noise reduction washing machine drainage pump according to any one of claims 1 to 9 is used, and the noise reduction method comprises the following steps: Step 1, when the drainage pump is fully loaded, water starts to drain, and water flows through the water inlet pipe (215), the water inlet chamber (211) connected to the water inlet pipe (215), the edge of the push-pull plate (3102), the water hole (214) and the drainage chamber (212) in sequence. The impeller (13) accommodated in the drainage chamber (212) rotates at a high head speed, the flexible one-way valve I (22) turns toward the outlet (242), the drainage pipe (218) opens, and at the same time the pipe IV (241) closes, and the water flows out through the drainage pipe (218) and the drainage pipeline (24), and the full-load drainage is completed; Step 2, the impeller (13) stops draining water, the flexible one-way valve I (22) falls back toward the drain pipe (218), the drain pipe (218) is closed, and at the same time the pipe IV (241) is opened, and the return water in the drain pipe (24) passes through the pipe IV (241), the connecting pipe I (25), the pipe II (217) and the water inlet chamber (211) in sequence, and merges with the residual water remaining in the water inlet chamber (211); Step 3, the axial plunger type evacuator (3) works, the push-pull disk (3102) performs a reciprocating push-pull motion in the water inlet chamber (211), the flexible one-way valve II (23) is closed, and the gas suspended above the water in the water inlet chamber (211) is discharged along the edge of the push-pull disk (3102) through one side of the baffle (318), pipe II (217), connecting pipe I (25), pipe IV (241) and the drainage pipe (24) in sequence, and the exhaust is completed; Step 4, the axial piston type drainer (3) stops working, the impeller (13) contained in the drainage chamber (212) rotates at a low head speed, the flexible one-way valve II (23) opens, and the water flows through the drainage chamber (212), the drainage pipe (218), the pipe III (219), the connecting pipe II (26), the flexible one-way valve II (23), the water inlet chamber (211) and the water hole (214) in sequence, and then returns to the drainage chamber (212), forming an internal circulation drainage; Step 5: When the drainage pump is fully loaded in the next cycle, drainage begins, and steps 1 to 4 are repeated.

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