JPS5854993A - One-tub type full automatic 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 (5) the control of the drain time of a single-tank fully automatic washing machine, and in particular eliminates spin start failure due to foaming during intermediate spin or final spin, and shortens the spin spin time. The present invention relates to wastewater control suitable for industrial use.

Conventional methods for controlling the drain time of single-tank fully automatic washing machines include a method in which the pressure switch that detects the water level is reset and turned on after a certain period of time after draining starts, and then the machine moves to intermediate spin or final spin. There is a method to move to intermediate dehydration or final dehydration at the same time as the water level drops and the pressure switch is reset after the start of drainage, but in the former method, the drainage time changes depending on the amount of drainage and drainage conditions, but there are no problems during actual operation. If the amount of drainage is small and the drainage conditions are good, the time setting is longer than necessary, and if the drainage conditions are poor, the system will move to dehydration with water remaining below the trip point and start dehydration by foaming. The latter method has the disadvantage of causing defects, and the latter method starts dewatering with water remaining in the outer tank at the same time as the pressure switch resets after draining starts, so as with the former method, the washing liquid contained in the items to be washed may leak out. However, the remaining water is stirred between the basket and the outer tank and foams, putting a heavy load on the motor that drives the basket and causing failure to start the dewatering process, so we use a method of intermittent dehydration followed by continuous dehydration. However, there was a drawback that the dehydration time was long.

An object of the present invention is to reduce the load on the motor at the start of dewatering and shorten the dewatering time by minimizing the draining time and performing continuous dewatering after complete drainage.

When draining water, the pressure switch controls the draining time until the pressure switch that detects the water level is reset, and after the reset, the draining time is controlled using the timer function, and after complete draining, the process moves to the dewatering process. This shortens the drainage time and eliminates startup failures at the initial stage of dewatering.

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. 1 is an outer frame, 2 is an outer tank disposed inside the outer frame 1, and is elastically supported by the outer frame 1 by a vibration-proof support mechanism 6 consisting of a support fitting 3, a spring 4, and a hanging rod 5. A drainage lower is formed at the bottom of the outer tank 2, and this drainage lower is communicated with the outside of the machine via a drainage hose 9 via a drainage valve 8.

The basket 10 has a large number of dewatering holes 11 formed in its circumferential wall, and rotary blades 12 are rotatably disposed at the inner bottom of the basket 10. Reference numeral 13 denotes a center case fixed to the support fitting 3 of the vibration-proof support mechanism 6, and a motor 14 for washing and dewatering and a clutch device 15 are attached to the center case 13. The motor 14 transmits rotational power to the basket 10 and the rotary blade 12 via a belt 16 and a clutch device 15. 17 is a balance ring provided on the upper opening edge of the basket 10, and 18 is a tank cover attached to the body opening edge of the outer tub 2. Said outer frame 1
A panel 20 is provided on the top cover 19 placed and fixed thereon, and the panel 20 is equipped with a timer 21 for sequence control of the program, a pressure switch 22 for controlling the water level inside the outer tank 2, and the like.

A pressure switch 22 that controls the water level and an air trap 23 provided on the lower peripheral wall of the outer tank 2 in communication with the inside of the outer tank 2 are connected via a tube 24, and the pressure switch 22 that controls the water level inside the outer tank 2 is connected to the air trap 23. The contacts inside the switch 22 are switched.

Next, the operation will be explained. Washing is carried out by an electromagnetic water supply valve (not shown) in response to a command from a timer 21.
Supply water within 0. When the water level reaches the specified level, the contacts in the pressure switch 22 switch, the electromagnetic water supply valve is closed, the motor 14 is energized, and the timer 21 commands the motor 14.
The machine operates in short-period automatic reversal mode, and the power is transmitted to the rotary blades 12 via the belt 16 and clutch device 15 to wash the laundry items placed in the basket. When the washing time has elapsed, the timer 21 turns off the power to the motor 14 and at the same time turns on the drain valve 8, which opens the drain valve 8 and drains the cleaning liquid in the outer tank 2 from the drain lower at the bottom of the outer tank 2 through the drain valve. 8 and drain hose 9, the water level H1 in the outer tank 2 decreases, and reaches the water level H2, which is the reset point at which the contact of the pressure switch 22 is switched. Drainage starts from water level H1,
The time control function of the timer 21 is stopped until the water level H2 reaches the reset point, and the time control function of the timer 21 is activated from the water level H2 at which the pressure switch 22 becomes reset true. The drain valve 8 continues to be opened for a certain period of time (t) until the cleaning liquid in the tank runs out.
) After the elapse of time, the motor 14 is continuously energized, the clutch mechanism (not shown) in the clutch device 15 is switched, and the basket 10 is rotated at high speed for dewatering, and the basket 10 is dehydrated.
Put the cleaning liquid contained in the items to be washed in 10 into basket 1.
Centrifugal dehydration is carried out through the dehydration hole 11 on the peripheral wall surface of 0, and the drain valve 8 remains open even during the dehydration operation.

After dewatering, the process moves to the rinsing process, and as with washing, the drain valve 8 is closed, water is supplied by the electromagnetic water valve, and after water supply, the motor 1
4 is energized, the rotary blades 12 are automatically reversed in a short period of time, and the items to be washed are agitated to perform so-called rinsing, which dilutes the detergent contained in the items to be washed.

After rinsing, if the rinsing effect is to be further enhanced, the dehydration process and rinsing process are repeated, and the process proceeds to the final dehydration process, completing the series of programs from washing to rinsing and dehydration.

The configuration is as described above. According to the experimental results of the example, when the amount of water used during washing or rinsing is set to 401, the time required for the pressure switch 22 to reach the water level H2 from the trip point to the reset point during draining after starting draining will vary depending on the draining conditions. Although it varies, on average it takes 1 to 2 minutes, and the time t from the reset point to complete drainage is 20-30 seconds on average.

An example of a system in which a pressure switch using a mechanical timer completely drains water after being reset will be described.

01 to C5 in Fig. 4 are the main cam switches of the timer, 81.82 are the sub cam switches for short-time control, and each cam switch is connected to each electrical component (drainage magnet M
11 Water supply valve 1. V, timer motor T, M, motor 14
, pressure switch 22) as shown in FIG.

Each cam switch is switched according to the time cycles shown in FIGS. 5 and 6.

When the timer advances to drain/spin (point A), C1 is a, C
2b, C3aC4-OFF, C5 becomes the b contact, and the drain magnet Mg operates to start draining water. At this time, since the water is full, the pressure switch is used, so the timer motor T
, M does not operate and continues draining water. When the water in the outer tank 2 decreases and the pressure switch 22 is reset to N or C, the timer motors T and M are energized through C3a and the timer operates, but the sub cam switch S2 is at point B, so it is turned off. Therefore, the motor 14 is not energized and only drainage continues.

When the water in the outer tank is completely drained 30 seconds after the pressure switch is reset, the sub cam switch S2 changes to a (point C) and the motor 14 is energized through the main cam switch C5 and the sub cam switch S2. and begins to dehydrate.

According to this embodiment, by connecting the main cam switch for long time control and the sub cam switch for short time control in series, it is possible to obtain a short drain time (30 seconds) after resetting the pressure switch.

In the microcomputer-controlled timer 21, the delay time t is set to 30 seconds, and the delay time t is set to 30 seconds after the pressure switch 22 is switched to the reset point according to the flowchart shown in FIG.
After seconds, fast dehydration is possible.

The rotor blade 12 according to the above embodiment has a height of 350 mm at the center.
It consists of a cylindrical protrusion 25 with a diameter of ~380 rIaR, and a lower part consisting of a rotor base 26 with an outer diameter of about 300 m, and a plurality of blades 27 provided on the rotor base 26 radially from the center of the rotor blade 12. When washing or rinsing the rotary blade 12, the timer 21 is activated for one sand stone rotation - one second pause.
By automatically reversing in a short period of 1 second counterclockwise rotation, cleaning performance with less fabric damage and fabric tangles can be obtained, and the washing items are less likely to be lopsided during intermediate spin-drying and final spin-drying after the washing or rinsing process. Since the vibration of the outer tank 2, which is vibration-proof and supported by the vibration-proof support mechanism 6 on the outer frame 1, is reduced, good vibration-proof performance can be obtained.

According to the present invention, when draining water, the dewatering process is started in a completely drained state, so that the outer tank 2 and the pass keratinium 10 at the start of dehydration are
The load resistance due to foaming caused by stirring the residual water containing detergent between the dryers is reduced, eliminating the need for conventional intermittent dewatering operation and allowing a direct transition to high-speed continuous operation, which shortens the time in the dewatering process. becomes possible. This effect is most pronounced in the intermediate dehydration process, from the drainage after the washing process, where the concentration of the detergent solution is high, and compared to the conventional method of transitioning from intermittent dehydration to continuous dehydration, intermittent dehydration is reduced to 1.5 minutes. Although 1.5 minutes of continuous dehydration was required, intermediate dehydration can be completed in only 1.5 minutes of continuous dehydration, which has the effect of halving the time required for intermediate dehydration.

[Brief explanation of the drawing]

Figures 1 and 2 are a front partial sectional view of an embodiment of the present invention, Figure 3 is a flowchart from the drainage process to the dewatering process controlled by a microcomputer, and Figure 4 is the circuit of a mechanical timer. 5 is a cam chart diagram of the main cam switch of FIG. 4, and FIG. 6 is a cam chart diagram of the sub cam switch of FIG. 4. 1...Outer frame, 2...Outer tank, 8...Drain valve, 10.
...Basket, 12...Rotor blade, 14...Motor, 15...Clutch device, 21...Timer, 22
...Pressure switch, 1st 20th Kudzu 40 ri 2 5a Kudzu 6 mouth

Claims (1)

[Claims] 1. In a single-tank fully automatic washing machine that automatically operates from the washing process to the rinsing/dehydration process, after the washing or rinsing process,
A single tank characterized by opening the drain valve to drain water outside the machine, and after the pressure switch that detects the water level switches from the trip point to the reset point, after a certain period of time has passed, the process moves to intermediate dewatering or final dewatering. Fully automatic washing machine. 2. In the above item 1, the fixed time is the time from when the water level in the outer tank is reset to the reset water level of the pressure switch until the drainage is completed.3. The single-tank fully automatic washing machine according to item 1, characterized in that the intermediate dehydration or final dehydration process is a continuous dehydration operation.