JPS59115090A - Drain apparatus of 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 FIELD OF INDUSTRIAL APPLICATION This invention relates to a drainage system for a washing machine of the type used in general households.

Conventional Structure and Its Problems FIG. 1 is an overall diagram of the basic structure of a conventional washing machine. As shown in Figure 2, 1 is an outer frame of the washing machine, and 2 is an upper body i, which covers the upper opening of the outer frame 1. 3 is a panel on which electrical components are attached to control the mechanical movement of the washing machine. The lid 4 is disposed in the center part 1ζ of the upper body 2 so as to be openable and closable. 5
is a water receptacle serving as an outer tub of the washing tub, and has a substantially cylindrical shape to receive washing water. Reference numeral 6 denotes a dehydration tub/washing tub, and 7 designates a dehydration hole provided on the cylindrical outer peripheral surface of the dehydration tub/washing tub 6. 8
is a stirring blade, which stirs the laundry. The stirring blade 8 is provided at the center bottom of the dehydration tub/washing tub 6. Reference numeral 9 denotes a motor, which is connected to
The rotation is transmitted to the mechanical case 12 that has a built-in clutch mechanism,
During washing, the stirring blade 8 is rotated, and during dehydration, the dehydration tub/washing tub 6 is rotated. The motor 9 and mechanical case 12 are provided with a reinforcing plate 13
is attached to. Further, these entire mechanical sections are suspended by vibration isolators @14. Spherical receivers 15 are provided at the four corners of the reinforcing board work 3, and vibration isolators 14 are attached to the spherical receivers 15.
is attached to the upper part of the outer frame 1 via a rod 16 so that it can slide freely. Reference numeral 17 denotes adjustment legs provided at the four corners of the bottom of the outer frame 1, which are used to adjust so that there is no wobbling when the frame is installed on the floor. The adjustment legs 17 are usually provided at one or two positions. 18 is a fixed leg. 19 is a drain cock frame with a drain valve installed inside;
When the washing water in the water tray 5 is to be drained, it is opened and discharged to the outside of the machine. At this time, a drain hose 2o is used to connect the drain cock 7L/-m 19 to the outside of the machine. 2
1 is a balancer ring, which has a liquid sealed inside, and when the water in the dehydration tank/washing tank 6 is unevenly dehydrated,
The liquid moves in a way that maintains its balance depending on this bias. Reference numeral 22 denotes a dewatering tray cover that reinforces the upper opening of the water tray 5.

Reference numeral 23 denotes an air trap chamber, which is connected to a pressure switch 25 by an air hose 24, and the joint portion of the air hose 24 is slotted to prevent air leakage. Therefore, when washing water is supplied to the water receiver 5, the air in the air trap chamber 23 is compressed, and when the water level reaches a certain level, the pressure switch 25 is activated to stop the water supply. The pressure switch 25 is usually attached to the panel 3 and has a built-in diaphragm made of rubber.
It senses pressure changes.

In such a conventional washing machine, as shown in FIGS. 2 and 3, an optical sensor 26 is attached to the tubular drain port 27,
It was thought that it might be a sensor-type Kou-Q machine that detects dirt in washing water. FIG. 2 shows the mounting portion of the optical sensor 26. A tubular drain port 27 protrudes from the bottom of the water receiver 5, and a guide pipe 28 connects to the tubular u1 water port 27.
Drainage with: Iy97'-A19"Iba56・
1 (71) ilF The optical sensor 26 shown in FIG. The washing water flows from the water tray 5 to the tubular drain port 2.
7° guide pipe 28. and drain cock frame 19
The level of dirt in this washing water is detected by transmitting light from an optical sensor 26, receiving the amount of light and converting it into voltage.

The drain cock frame 19 is fixed to the bottom of the water receiver 5. A drain valve 31 made of an elastic material such as synthetic rubber is disposed inside the drain cock frame 19, and the valve seat front 32 is always held by a cock spring 33. Press against it to prevent washing water from leaking. When the washing water is to be drained, the electromagnetic solenoid 34 is energized to attract the suction part 35, thereby causing the second clot 36 connected to the suction part. 1st crotch 37
is moved in the A direction by the second Kotoku spring 38. At this time, the drain valve 31 is opened in the inlet direction via a spring guide 39 attached to the drain valve 31 to drain the washing water. A rubber material is generally used for the drain valve 31, and the bellows portion 40 is integrally molded to satisfy flexibility.

The drain valve 31 is attached to the drain cock frame 19 with a cock lid 41 providing sealing properties.

However, in the conventional configuration, simply the tubular drain 27
The light sensor 26 emits light on the outer periphery of the work guide 34128,
Since the light receiving elements 29 and 30 are arranged, the tubular drain port 27. is contaminated with washing water. Dirt on the inner wall of the guide pipe 28 becomes a problem, and detergent residue and scale due to water quality adhere, resulting in the light from the light emitting element 29 being blocked by this dirt, and the light not being transmitted to the light receiving element 30 side, resulting in normal operation. It was impossible to detect dirt in the washing water.

OBJECTS OF THE INVENTION An object of the present invention is to provide a drainage device for a washing machine that can automatically clean the inside of a guide pipe for draining water, and can always accurately detect drainage stains using an optical sensor.

Structure of the Invention This invention provides a drain valve that closes the outlet of a guide pipe.
A sliding part inserted into the guide pipe is provided on the body, and the outlet part of the guide pipe is cleaned every time the drain valve is opened and closed. Therefore, detection of drainage dirt by the optical sensor provided at the outlet of the kite pipe is not obstructed by deposits on the inner wall of the guide pipe, and drainage dirt can always be accurately detected.

DESCRIPTION OF THE EMBODIMENTS One embodiment of the present invention is shown in FIGS. 4 to 7. Fourth
In the figure, a drain valve 31' housed in a drain cock frame 19 made of a transparent resin material is partially fitted and held by a flange 44 that is d on the outer periphery of the cylindrical part of the first socket 37'. are doing.

A sliding part 43 having a flexible part 42 is integrally provided in the substantially cylindrical center of the drain valve 31', and is normally housed in the tip of the drain valve 31'. . A spring guide 39' is also formed in the sliding part 43 by molding at the same time, and a pulp spring 45 is hooked onto this spring guide 39' and always set. A step is provided inside the first lock 3de, a second lock spring 38 is set in the step, a spring guide 39a is hooked to one end of the second lock spring 38, and the other end is It is connected to a second rod 36. The cock spring 38 is set so as to always apply a tensile force, and the pulp spring 45 is also set to the spring guide 3 so as to apply a tensile force.
9'l is set. Here, it is assumed that the valve spring 45 has a smaller spring constant. Further, the first drain plug 37' is pressed by a cock spring 33, and the drain valve 31' is pressed against the valve seat surface 32 to prevent washing water from leaking. The drain 33 is set in the cock lid 41, and the other end of the drain valve 31' is held here between the drain cock frame 19 and the cock lid 41 to provide a seal. The optical sensor 26 is disposed in the direction in which the sliding portion 43 moves, and has light emitting and light receiving elements 29 and 30 provided in contact with the guide pipe 28, respectively, centered on the X-X axis in the drawing.

No. figure. Okay, drain valve, □・0 close. However, in FIG. 5, the drain valve 31' is connected to the electromagnetic solenoid 3.
4 (FIG. 2), which shows the state in which the drain valve 31' has been moved in the A direction by a distance C from the valve seat surface 32. With this action, all the washing water is washed away. FIG. 6 shows the movement of the sliding portion 43 after the drain stroke and dewatering stroke are completed. When the electromagnetic solenoid 34 (Fig. 2) is turned off, the drain valve 31' rapidly moves toward the valve seat 11ii32 (direction B) by the force of the cock spring 33, and the valve seat surface 32 and the drain valve The tip of 31' will collide. At this time, since the sliding part 43 has the bending part 42, the valve seat surface 32 moves by a distance iE, which is a direction B, due to the inertial force in the B direction generated by this collision. The amount of movement #I depends on the shape of the bending part 42 and the sliding part 43.
, but it tends to be proportional to dimension C. Therefore, the sliding portion 43 moves by the dimension E, and this dimension E
The light emitting and light receiving elements 29 and 30 of the optical sensor 26 may be installed near the machined valve seat surface 32 (dimension D). When this sliding part 43 moves by the dimension E, the valve spring 45
is pulled in the direction B, and when the inertial force disappears again, the sliding part 43 is pulled and returned to its original position.

In this way, when draining washing water,
In the operation of turning on the electromagnetic solenoid 34 to open the drain valve 31' and then closing the drain valve 31' at the end of draining, etc., the sliding part 43 is activated by the inertial force using the law of motion. When jumping forward, the sliding part 43 scrapes off dirt on the inner wall, which corresponds to the light emitting and light receiving elements 29 and 30 of the guide pipe 28 to which the optical sensor 26 is attached. A proper amount of light from the light emitting element 29 can be transmitted to the light receiving element 30.

FIG. 7 is a graph in which the amount of light transmitted when dirty is replaced with U' force voltage. If there is no dirt, the output voltage will be a constant value V. However, if dirt adheres to the inner wall of the guide pipe 28, the output voltage also decreases. In terms of performance, the deterioration of light detection is prevented by removing dirt as described above, but all of this is done naturally when the drain valve 31' is opened and closed. Therefore, in the past, stains had to be cleaned by disassembling the product or using special cleaning agents, but with this invention, these inconveniences have been eliminated, and the product has always been exposed to light. A highly reliable component of the sensor 26 can be provided.

Effects of the Invention The present invention has nine advantages in that the inside of the guide pipe for draining water can be automatically cleaned, and drainage stains can always be accurately detected by the optical sensor.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a conventional washing machine, Fig. 2 is a partially enlarged sectional view thereof, Fig. 3 is a sectional view taken along line ff1-m, and Fig. 4 is a partial sectional view of an embodiment of the present invention. , FIG. 5 and FIG. 6 are explanatory diagrams of the operation, and FIG. 7 is a graph showing the relationship between dirt and the amount of transmission, which also shows the characteristics of the optical sensor. 5... Water hook (washing tub), 26... Light sensor, 27
゜...Tubular drainage port, 28...Guide pipe, 31'
...Drain valve, 32...Valve seat surface, 33...Cock spring, 34...Electric diagram 1

Claims (2)

[Claims] (1) A washing tub having an agitation means, a guide pipe connected to the drain of the washing tub and having a translucent part near the outlet, and a guide pipe arranged facing each other across the translucent part of the guide pipe. an optical sensor that has a light-emitting element and a light-receiving element and detects water contamination in the guide pipe; A drain valve to be covered, an opening/closing drive device for the drain valve, and a device that is integrally provided at the center of the curved surface of the drain valve and pushed into the transparent portion of the guide pipe when the drain valve is closed. A washing machine drainage device equipped with a sliding part for cleaning parts. (2) The drain valve is formed of an elastic material in which the sliding portion expands and contracts forward with respect to the peripheral edge, and a sliding portion drive mechanism that expands and contracts the sliding portion in conjunction with opening and closing of the on-off valve. A drainage device for a washing machine according to claim (1).