JPS58121992A - Water discharge pump for washer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drain pump for a washing machine that forcibly drains washing water from the washing machine.

Conventional drain pumps for washing machines are high-head pumps and do not have a large amount of drainage.

However, considering the current usage conditions, the drainage pump for washing machines requires a flow type rather than a high head type.
There is a demand for something that can drain washing water in a short time.

Furthermore, when conventional drainage pumps discharge cloth waste contained in washing water at the same time as washing water, the cloth waste clogs the space between the runner and the side wall of the casing, locks the motor, and makes it impossible to drain the water. This had the disadvantage that it could lead to motor burnout.

Furthermore, because conventional drainage pumps are of high head type,
The load is large and is greatly affected by voltage fluctuations, and the voltage is
When the voltage drops to about -10% of the rated voltage, the amount of water discharged decreases significantly, which has the disadvantage of inhibiting its function as a drainage pump.

The present invention eliminates the drawbacks of the prior art described above, changes the conventional high-head type to a flow-rate type, and changes the shape of the pump runner to prevent clogging of fabrics contained in washing water. To provide a drain pump for a washing machine that can prevent the problem of water leakage and reduce changes in i quantity characteristics even when a low voltage is applied.

The present invention will be explained below based on the drawings.

FIG. 1 is a partial sectional view of a pump according to the prior art;
Washing water enters through the inlet 1a of the trap 1, foreign matter contained in the washing water is collected by the trap 1, and the washing water, cloth waste contained in the washing water, and runner 2 are transferred to the outlet 1b.
As can be seen from the partial cross-sectional view of Fig. 1, the runner 2 is a high-head type runner, and the runner blades 2a,
It consists of four symmetrical blades.

Therefore, as the drainage time elapses, the blade 2a and the blade 2
Accidents occur in which the washing water gets clogged with waste cloth during washing, making it impossible to drain the water.

In addition, since two runners require a large amount of torque to discharge the washing water, it is necessary to increase the torque by increasing the size of the stator 3 and changing the windings. Unable to respond to changes in voltage, during low voltage operation, the rotation of the runner 2 suddenly drops and the amount of discharge drops significantly.

In addition, the influence of power supply frequency also affects pump performance.

#), power supply frequency soHg.

It was in a state where it could not be used unless the switching tap 4 for 60H2 was provided.

FIG. 2 is a partial sectional view of a pump according to the present invention. The flow of washing water is the same as that of the conventional pump shown in FIG. 1, and the foreign matter contained in the washing water is The washing water and the cloth waste contained in the washing water are collected by the trap 5 and discharged from the discharge lower by the runner 6.

FIG. 3 is an enlarged sectional view of the main part of the runner 6.

The runner 6 shown in FIGS. 2 to 4 is provided within the pump casing 8. When the ring-shaped protrusion 9Fi on the outer periphery of the runner 6 rotates, the space 10 between the pump casing 8 and the runner 6 becomes negative pressure, and the washing water is forced to flow.

At the same time as the fabric waste flows into this space 10, the fabric waste itself accumulates within this space 10, causing fabric waste clogging (t#). Ninth, in order to reduce these conditions as much as possible, a protrusion 9 is provided on the outer part of the runner 6, and the gap is made smaller by this protrusion 9 and a ring-shaped protrusion 11 provided on the casing 8. A ring-shaped projection 12 is provided at the bottom of the runner 6. This protrusion 12 prevents small pieces of cloth from wrapping around the rotating shaft 13 and damaging the seal 14. 6 runners, semi-spherical.

Inside the runner 6, four blades 6a are arranged at equal intervals.

In this way, since the flow of washing water becomes streamlined, the proportion of the load applied during drainage is small and the torque of the motor 15 can be reduced, and at the same time, the thickness of the stator can be made thinner and the weight of the motor 15 can be reduced. It is possible to achieve this goal.

Further, the ring-shaped protrusion 16 on the casing 8 prevents the washing water flowing into the runner 6 and the water flowing out from the discharge lower by the runner 6 from overlapping each other, resulting in turbulent flow when the washing water flows in the direction of the arrow. prevent. That is, since the washing water flows toward the center of the runner 6, turbulent flow is suppressed.

FIG. 5 shows experimental values showing the relationship between the voltage of a drainage pump according to the prior art and the drainage pump according to the present invention and the amount of drainage from the discharge side. In the conventional product, as shown in curve 1 F8, the amount of water discharged changes significantly as the voltage changes, indicating that the influence of voltage is large. The reason for this is that, as described above, the influence of the runner 6 is large, and as the voltage decreases, the load applied to the motor 15 increases, and the torque of the motor 15 is insufficient.

Curve F is a characteristic curve of the pump of the present invention, and it can be seen that it is not greatly influenced by voltage.

FIG. 6 is a Q-H characteristic curve of the drainage pump.

The prior art product is a high head pump and can discharge to a high place, but it is clearly seen from curve Q that the discharge flow rate is low. Song #Q, ke, The drainage height is not as high as the conventional product, but the amount of drainage is large.

The actual drainage height required for current washing machines is about 1 m because drainage is carried out into the washbasin and rounded table, and there is no need for a drainage height of 1.5 m as in the past. On the other hand, as washing machines become larger and require a larger amount of washing water, a flow type pump that can discharge a large amount of washing water in a short period of time is required. As can be seen from the monologue 11Q of the present invention, more water can be discharged than before, so the above requirements can be met.

Since the gap between the protrusion 12 provided at the bottom of the runner 6 and the inner surface 8a of the casing 8 is reduced, cloth waste contained in the washing water is prevented from flowing into the rotating shaft 13 side.

By setting the nine protrusions 9 on the outer peripheral surface of the runner 6 and the protrusions 11 on the casing 8 with a gap of 2m to 3+w, and wrapping them together, fabric waste and insects contained in the washing water can be removed. A foreign object 17 such as a pin is in the space 10 inside the casing 8.
prevent from entering.

Since the protrusion 16 of the runner 6 suppresses the generation of turbulence, the air inside the casing 6 is discharged from the discharge lower.
In addition to preventing the occurrence of air lock phenomenon,
Pump efficiency can be improved by about 10%.

According to the first aspect of the present invention, it is possible to provide a drain pump for a washing machine that can prevent clogging with cloth waste and can efficiently drain water even when a low voltage is applied.

[Brief explanation of the drawing]

FIG. 1 is a partial sectional view of a conventional pump, FIG. 2 is a partial sectional view of a pump of the present invention, FIG. 3 is an enlarged sectional view of the present invention, and FIG. 4 is a plan view of a runner of the present invention. FIG. 5 is a characteristic curve diagram of voltage and displacement, and FIG. 6 is a QH characteristic curve diagram. 5... Trap, 6... Runner, 8... Pump casing, 9... Protrusion, 10... Space, 11.
12...Togaku 1 drawing 2 drawing 3 drawing q V Nagi (v) →

Claims (1)

[Scope of Claims] 1. A drainage pump for a washing machine configured to discharge washing water that has passed through a trap toward a discharge port side by means of a runner, in which the runner is of a flow type, and the inflow portion to the runner is A drain pump for a washing machine, characterized in that a ring-shaped projection is provided that projects toward the runner side. 2. The drain pump for a washing machine according to claim 1, wherein a KIJ-shaped protrusion is formed on the outer peripheral surface of the runner. 1. Claim #, characterized in that a ring-shaped protrusion is formed on the bottom surface of the runner! A drain pump for a washing machine as described in item 1.