JPH0316631Y2 - - Google Patents

Description

[Detailed explanation of the idea] (b) Industrial application fields The present invention relates to a washing machine.

(b) Conventional technology A fully automatic washing machine corresponding to the conventional example was developed in 1983.
This is disclosed in Japanese Patent No. 46199, and will be explained based on FIG.

1 is an outer tank, and inside is an inner tank 2 that serves as a washing and dehydrating tank.
has been set up. A rotor blade 4 is disposed in a recess 3 with a lower opening provided at the center of the bottom of the inner tank 2, and a plurality of back blades 5 are provided radially on the back surface of the rotor blade 4. . 6... is a dehydration hole drilled in the side wall of the inner tank 2, 7 is a balance ring, 8
9 is the drive motor, 9 is the reduction gear, and 10 is the recess 3.
This is a substrate that covers the bottom opening of the. The substrate 10
A plurality of through holes 11 are provided. The liquid between the inner and outer tanks 2 and 1 flows through the through holes 11 to the pump chamber 12 formed by the recess 3 and the substrate 10 by the pump action of the back blade 5 when the rotor blade 4 rotates. It gets sucked in.

The wall surface of the inner tank 2 has a pump chamber 1 from its upper end.
A concave groove 13 leading to the pump chamber 1 is formed, and a water channel cover 14 is fitted into this concave groove 13 to open the pump chamber 1.
2 discharge channels 15 are formed. The discharge port 16 of the discharge waterway 15 faces into the tank from a proper position of the balance ring 7.

When the rotary blade 4 rotates during washing, the pumping action of the back blade causes the inner and outer tubs 2, 1 to flow as shown by the arrows.
The liquid between them is sucked into the pump chamber 12 through the through holes 11, passes through the discharge waterway 15, and is discharged from the discharge port 16 into the tank. A lint filter 17 is mainly attached to the discharge port 16, which makes it possible to collect lint.

However, with such a device, liquid may leak out of the pump chamber 12 from the gap t between the rotor blade 4 and the recess 3, or turbulence (water flow acting in a direction that prevents water absorption into the pump chamber) may occur at the bottom of the tank. This may occur, resulting in a decrease in pump capacity.

Particularly, when a relatively large-diameter rotor blade is rotated at low speed and in a short period of time in order to suppress cloth entanglement, as in this conventional example, the decrease in the pumping capacity is remarkable, and the thread waste is caught. The collection ability is also poor.

(c) Problems to be solved by the invention The present invention improves the pumping capacity of a pumping device that utilizes the back blade of a rotary blade in a washing machine.

(d) Means for Solving the Problems The present invention provides a washing machine in which washing liquid is circulated by the pumping action of a back blade of a rotor blade, in which a cover is attached to the lower end surface of the back blade, and the rotor blade A waterway is formed by the back surface, the back blade, and the cover.

(e) Effect: In other words, the water channels are arranged radially on the back side of the rotor.
By sucking in liquid from the center side of the rotor in the water channel and sending it into the discharge waterway from the peripheral side of the rotor in the water channel using centrifugal force, the directivity of the discharged water is improved and the pumping capacity is improved.

(F) Embodiment An embodiment of the present invention will be described based on FIGS. 1 and 2. However, the same reference numerals are used for the same parts as in the conventional example, and the explanation is omitted.

On the upper surface of the rotor blade 4, 12 large, medium, and small
The blades 18... are installed upright, and the back blades 5... are
Twelve blades are similarly formed radially on the back side of the blades 18 with the base 19 in between. and,
Each of the back blades 5 is integrally formed with a boss 20 up to the lower end surface of the blade.

Reference numeral 21 denotes an annular cover, which is screwed onto the bosses 20 so as to face the back surface of the rotary blade 4 with the back blades 5 in between, and closes the lower ends of the back blades 5. That is, 12 water channels 22 are formed radially on the back side of the rotor blade 4 by the back surface of the rotor blade 4, the back blades 5, and the cover 21. Also,
The cover 21 has annular ribs 23 and 24 extending vertically along its inner and outer edges.

The substrate 10 covering the lower opening of the recess 3 is provided with an annular through hole 25 that serves as a suction port for the washing liquid, and the outer diameter P of the through hole 25 and the inner diameter Q of the cover 21 are The openings 26 on the rotor blade center side of the water channels 22 are made to face the through holes 25.

The operation will be explained based on this configuration.

When the rotary blade 4 rotates during washing, the back blade 5...
Due to the pump action, the washing liquid between the inner and outer tubs 2, 1 is sucked into the pump chamber 12 from the through hole 25 as shown by the arrow, and into the water channels 22 from the openings 26 on the rotor center side of the water channels 22. The liquid sucked into the water channels 22 is sent into the discharge channel 15 from the opening 27 on the rotor peripheral side of the water channel 22 due to centrifugal force, and is discharged into the tank from the discharge port 16 at the upper end of the discharge channel 15. Ru.

The ribs 23 and 24 formed on the cover 21 are
This not only prevents deformation of the cover 21 and the rotary blades 4, but also allows smooth suction and delivery of the liquid in the water channels 22 during liquid circulation, and also ensures that the liquid once sent into the discharge channel 15 is This backflow of liquid is blocked to prevent it from flowing backwards, passing below the water channels 22, and reaching the through holes 25 (suction ports), thereby reducing pumping performance.

As described above, in this embodiment, the pump capacity is improved by sucking liquid into the water channels 22 and sending it into the discharge water channel 15 by centrifugal force. Moreover, through hole 25
and the rotor blade center side opening 26 of the water channel 22... are opposed to each other, and the boss 20 is integrally formed with the back blade 5 so that it is not located in the water channel 22.
Resistance during liquid circulation is removed as much as possible to ensure smooth liquid circulation.

It should be noted that the ribs 23, 24 can function satisfactorily even if only one of them is used.

(G) Effects of the invention The washing machine of the invention sucks liquid into the water channel and sends it out from this water channel into the discharge waterway by centrifugal force, so the discharge water can be sent to the discharge waterway with good directionality. Rotary blades, which can strengthen the water flow
The effects of water leakage between recesses and turbulent flow within the tank can be weakened, and the pumping capacity can therefore be improved.

Therefore, it exhibits excellent effects in collecting lint and enhancing cleaning power.

[Brief explanation of the drawing]

FIG. 1 is an enlarged vertical sectional view of the main parts of the washing machine of the present invention, FIG. 2 is a cross-sectional view of the inner tub, and FIG. 3 is a sectional view of the main parts of a conventional washing machine. 2...Inner tank (washing tub), 4...Rotary blade, 5...
Back blade, 12...pump chamber, 15...discharge waterway,
21...Cover, 22...Waterway.

Claims (1)

[Scope of utility model registration request] The back blades of rotary blades are arranged radially in a pump chamber formed at the bottom of the washing tub, and the pumping action of the back blades sends the washing liquid from the top of the tub to the discharge channel formed from the bottom of the washing tub to the top of the side wall. 1. A washing machine discharging water into a tank, characterized in that a cover is attached to the lower end surface of the back blade, and a waterway is formed by the back surface of the rotary blade, the back blade, and the cover.