JPH01221199A - Water feed device for washing machine - Google Patents

Abstract

PURPOSE:To automatically feed a specified amount of water to a washing tub, by a method wherein a control device repeats a series of motions, in which, after a water feed valve is opened by a water level detecting device and water is fed to a water storage tank until a water level is raised to a given value, a drain valve is opened and after completion of drainage of water in the water storage tank, the drain valve is closed, according to a set amount of using water. CONSTITUTION:A water feed hose 33 and a water feed valve 34 to automatic feed water and stop the feed of water are located to the upper part of a water storage tank 32, washing water fed by means of the water feed valve 34 is stored in the water storage tank 32. A luminous element 35 and a collection element 36 are disposed on the wall surface of the water storage tank 32, and since a collection amount is decreased when a water level is raised to a value higher than a specified level, a full-of-water state is detected. A control device 39 to input a signal from the collection element 36 brings the water feed valve 34 into an OFF-state at a point of time when a full-of-water state is detected and simultaneously brings a drain valve 37 into an ON-state, and washing water in the water storage tank 32 is drained and water is fed through a injection port 38 to a dehydrating and washing tub 7. After lapse of a specified time in which the water storage tank 32 becomes empty, the control device 39 brings the drain valve 37 into an OFF-state again, and brings the water feed valve into an ON-state to feed water to the water storage tank. The control device 39 repeats the aboves according to an amount of using water set by a set means 40.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a water supply device for a washing machine that automatically supplies washing water into a washing tub.

2. Description of the Related Art A conventional single-tank centrifugal dehydrator, for example, has an outer box 2 on top of an outer frame (main body) 1, as shown in FIG.

Reference numeral 3 denotes a panel to which an electrical component 4 (control device) is attached to control the mechanical movement of the washing machine. The lid 6 is arranged in the center of the outer box 2 so as to be openable and closable. The water receiver 6 has a cylindrical shape to receive washing water. A dehydration tub/washing tub (inner tub) 7 is disposed within the water receiver 6, and a dehydration hole 8 is provided on the outer periphery of the dehydration tub/washing tub 7. The rotary blade 9 is disposed at the center bottom of the dehydration tub/washing tub 7 to agitate the laundry. The rotational force of the electric motor (motor) 1o is transmitted via a motor pulley 11 and a belt 12 to a mechanical case 13 with a built-in clutch mechanism.
During washing, the rotary blade 9 is rotated, and during spin-drying, the spin-drying tank/washing Pf 17 is rotated. Electric motor 1
o. The mechanical case 13 is attached to the reinforcing plate 14.

The entire mechanism is suspended by a vibration isolator 16, and spherical receivers 16 are provided at the four corners of the reinforcing plate 14. It is slidably attached to the top. Reference numeral 18 denotes adjustment legs provided at the four corners of the bottom of the outer frame, which are used to adjust so that there is no wobbling when installed on the floor, and these devices are usually provided at one or two locations. 19 is a leg. 2o is a drain cock, which is installed inside so that the drain valve can be opened and closed.
When the washing water in the water tray 6 is to be drained, it is opened and discharged to the outside of the machine. The drain cock 20 is normally opened and closed by the force of an electromagnetic magnet 21. Washing water is discharged to the outside of the machine through a drain hose 22 that connects the drain cock 2o to the outside of the machine. 23 moves within the balancer ring so that the liquid is balanced according to the degree of bias of the balancer. 2
Reference numeral 4 denotes a dewatering tray cover that reinforces the upper opening of the water tray 6. In conventional dehydration, dehydration was carried out by using the dehydration hole 8 and scattering water into a water receiver using centrifugal force.

Figure 4 shows a conventional water level detection device. An air chamber 26 is provided at the bottom of the outer periphery of the water receiver 6, and a stopper 2 is provided at the bottom of this air chamber 26.
6, and a connection port 27 is provided at the top. Then, connect the air pipe 28 to the connection port 27, and connect the air pipe 28 to the pressure switch 29 attached to the panel 3.
The other ends of 8 are connected. This pressure switch 29 converts the water level of the washing water supplied into the water receiver 6 into pressure, and turns the switch ON or -0FF to control the amount of water supplied.

Further, a cushioning material 3o such as foamed sponge is passed through an arbitrary position in the middle of the air pipe 28, and the cushioning material 3o is attached to the main body to fix the air pipe 28.

゛Problems to be Solved by the Invention However, in the conventional configuration, the pressure switch 29 has an air chamber 26.
Since the air pipe 28 is necessary to transmit the pressure of There was a problem in that the pipe 28 also swayed, damaging the air pipe 28 and making it impossible to smoothly detect the water level.

The present invention is intended to solve these problems, and aims to automatically supply a constant amount of water into the washing tub without an air pipe.

Means for Solving the Problems In order to achieve the above objects, the present invention provides a water tank provided at the upper part of the main body of the washing machine, a washing tank to which water is supplied from the water tank, and a predetermined water level in the water tank. a detection device that detects the water, a water supply valve that supplies water to the water storage tank, a drain valve that controls the supply of water to the washing tub, and a control device that controls the water supply valve and the drain valve, The control device opens a water supply valve using the water level detection device to supply water to a predetermined water level in the water storage tank, closes the water supply valve, opens a drain valve, and closes the drain valve after draining the water in the water tank. It is configured to repeatedly operate according to the set amount of water used.

Function: With this configuration, the amount of water used can be set using the water supply circuit from the water tank, making it possible to eliminate the need for air pipes, etc., making it possible to supply safe washing water without considering the durability of air pipes, etc. becomes.

Example Embodiments of the present invention will be described below with reference to FIG.

In the figure, a water storage tank 32 is arranged above the panel 31, and a water supply hose 33 and a water supply valve 34 that automatically stops water supply are provided at the top of the water storage tank 32. The configuration is such that the data is stored in . This water tank 32
A light-emitting element 36 and a light-receiving element 36 are arranged on the wall surface, and constitute a water level detection means for detecting a full water state because the amount of light received decreases when the water level exceeds a certain level. The control device 39 that inputs the signal from the light receiving element 36 controls the water supply valve 39 at the time of full water detection.
At the same time, the drain valve 37 is turned on to drain the washing water in the water tank 32 and supply water to the spin-drying/washing tank 7 from the water inlet 38. After a certain period of time when the water tank 32 becomes empty, the control device 39 turns off the drain valve 37 again and turns on the water supply valve to supply water to the water tank. Control device 3
9 repeats this process according to the water usage amount set by the setting means 40.

Next, the control flow of the control device 3e will be explained with reference to FIG. First, in step 41, n = O is initialized, and if it is set to a high water level in step 42, it is set to A ± 6 in step 43, and if it is determined that the water level is medium in step 44, it is set to A = 4 in step 46. , If it is determined in step 46 that the water level is low, then A=2 is set in step 47. And A
After setting =2.4.6, the process moves to the subroutine shown in FIG. That is, if the water supply valve is turned on in step 48 and the water level detection means determines that the water is full (step 49)
, the water supply valve is turned off in step 6o. and step 5
The drain valve is turned on in step 1, and the drainage property is kept turned on until a predetermined time has elapsed (step 52). When the predetermined time has elapsed, the drain valve is turned off in step 63, and a new one with n = 1 added is turned on. n, the value of n and A set for each water level are compared, and the above operation is repeated until the value is reached (step 54). Then, when this subroutine ends, it ends.

Effect of the invention According to the present invention as described above, the following effects can be obtained.

(1) There is no need to connect the pressure switch with an air pipe as in the past, and the sensitivity of the pressure switch may deteriorate due to wear of the air pipe due to vibration or bending or tearing of the air pipe.
There is no need to consider dust or detergent scum clogging in the air pipe, and with the water storage method, it is a simple configuration that only stores a certain amount of water and then injects water, and the assembly is fixed, so the air pipe method It is possible to rationalize the difference from the installation to the swinging part.

(';4 Since it is a water storage type, time can be shortened by the amount of water initially stored.

('4) If you use the natural fall water injection method, you can set a fixed time to drain the water in the water tank, and there is no need to measure the drainage time, and the configuration is simple.

(4) The larger the water storage capacity, the fewer times water is poured, and the thicker the water injection system channel, the faster the water injection speed can be, and the washing time can be shortened.

[Brief explanation of the drawing]

Figure 1 is a vertical cross-sectional view showing the water supply device of a washing machine according to an embodiment of the present invention, Figure 2 is a flowchart showing the same control flow, Figure 3 is a vertical cross-sectional view of a conventional washing machine, and Figure 4 is a vertical cross-sectional view of a conventional washing machine. FIG. 3 is a cross-sectional view showing how the air pipe is attached. 1...Main body, 7...Dehydration/washing tub, 3
1...Panel, 32...Water tank, 34
...Water supply valve, 36...Light emitting element, 36
・Song/light receiving element, 37... Drain valve, 39...
···Control device. Name of agent: Patent attorney Toshio Nakao, 1st person, 2nd person
Figure (2 (b) WJ3 diagram

Claims (1)

[Claims] A water tank provided at the upper part of the washing machine main body, a washing tank to which water in the water tank is supplied, a detection device to detect a predetermined water level in the water tank, and a water supply valve to supply water to the water tank. and,
A drain valve that controls the supply of water into the washing tank; and a control device that controls the water supply valve and the drain valve; A water supply device for a washing machine that repeats a series of operations according to the set amount of water used, such as closing the water supply valve and opening the drain valve after supplying water to the water level, and closing the drain valve after draining the water in the water tank.