JPS62275497A - Washing machine - 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 3. Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a washing machine equipped with a dehydrating function.

(Prior art) Centrifugal dehydration is widely known as a conventional dewatering method in washing machines, but such a method requires a rotating tank with many holes and also suffers from vibrations during dehydration. , noise was a problem.

However, the applicant does not use a rotating tank and uses vibration,
We are currently developing a dewatering method that can eliminate noise problems. This dewatering system includes a pressure-responsive body consisting of a telescoping section and a pressing section provided at the bottom of the telescoping section.The pressure-responsive body supports the upper end of the telescoping section, and the pressure-responsive body presses the opening of the washing tub. This is a method in which the washing tub is closed, the pressure inside the washing tub is reduced, the pressure inside the tub is made negative, the pressing part is moved downward, and the washing is pressed and compressed by this pressing part to squeeze out the water. According to this method, The rotating tank can be omitted, there are no vibration and noise problems associated with the rotation of the tank, and there is no need to adopt a vibration-proof structure.

(Problems to be Solved by the Invention) By the way, when such a dehydration method is put into practical use in a washing machine, the following problems occur.

That is, the inside of the washing tub is sealed by a pressure-responsive body, and when water is supplied into this closed space, the pressure within the space increases as the water level rises, causing serious problems in the water supply operation.
Further, problems arise, such as the inability to adopt a water level detection method based on pressure changes.

However, the present invention solves the problem during water supply and makes it easy to put this type of dewatering system into practical use.

(Means for solving the problem) When water is supplied to the washing tub, an exhaust valve is provided that opens as the water level in the washing tub rises.

(Function) When the water level in the washing tub rises due to water supply and the pressure inside the washing tub increases, the exhaust valve opens and opens the inside of the washing tub to the atmosphere. Therefore, water supply work can be carried out without causing problems such as water leakage at the connection part of the water supply hose, and it is also possible to employ a water level detection method based on pressure changes.

(Example) Examples of the present invention shown in the drawings will be described in detail below.

1 is the outer frame of the washing machine, 2 is the washing tub with an opening at the top, and its bottom f
A water supply port 4 is formed in the upper part of the side wall, and an exhaust port 5 is formed above the water supply port 4, respectively.

6 is a pulsator placed at the inner bottom of the washing tub 2, and 7 is a motor for driving the pulsator.

Reference numeral 8 denotes a water circulation type pressure reducing device interposed between the discharge port 3 of the washing tub 2 and the drain 9, which includes a circulation path IO1 having a venturi pipe section 11, a pump 12 inserted in the circulation path 10, and a venturi pipe section. The nozzle 13 is connected to the discharge port 3 of the washing tub 2, and the discharge valve 14 is inserted between the highest part of the circulation path 10 and the drainage path 9. In addition, the lowest part of the circulation path 10 is connected to a drain valve 15.
It is connected to the drainage channel 9 via. 16 is a water supply channel that connects the water supply port 4 of the washing tub 2 and the circulation path 10 and has a water supply valve 17 inserted in the middle; 18 is another water supply channel that connects the circulation path 10 and a water faucet, etc.; Insert the water supply valve 19. Reference numeral 20 denotes an exhaust path connected to the exhaust port 5 of the washing tub 2, and an exhaust valve 21 is inserted therein. Open operation.

22 is a lid pivoted to the washing machine outer frame l with a shaft 23 so that it can be rotated and opened/closed; 24 is a pressure-responsive body consisting of a bellows-shaped extensible part 25 and a pressing part 26 provided at the bottom thereof; The upper end of the extendable portion 25 is attached to the inner surface of the lid 22, and the lid 22i is supported. The upper end of the elastic part 25 of the pressure-responsive body 24 also serves as a backing, and is sandwiched between the upper end of the washing tub 2 and the inner surface of the lid 22 to seal the space therebetween. Therefore, the pressure responsive body 24
partitions the internal space formed by the washing tub 2 and the lid 22 into upper and lower parts, and forms a measurement space 27 and a lid side space 28.

29 is a passage 30 and a communication passage 31 formed integrally with the lid 22.
A vacuum pump 32 communicates with the lid side space 28t through a vent passage 32 branched from the communication passage 31, into which a vent valve 33 is inserted. 34 is a clamp device that locks the lid 22 in a closed state.

Note that the discharge valve 14, drain valve 15, water supply valve 17, 19, and vent valve 32 are composed of electromagnetic valves.

In the above configuration, laundry and detergent are put into the washing tub 2, and operation is started with the lid 22 closed. At this time,
The pressing portion 26 of the pressure responsive body 24 is held at the upper position.

First, the water supply operation is performed by opening the water supply valves 17 and 19, and the water supplied from the tap is supplied into the washing tub 2 from the water supply port 4 via the water supply channel 18, the circulation path 10, and the water supply channel 16. Then, the water level in the washing tub 2 rises, and the excess air in the tub 2 pushes open the exhaust valve 21 and is discharged from the exhaust path 20, so that the internal pressure in the test space 27 increases. There is no adverse effect on the water supply operation.

When the water level in the washing tub 2 reaches a predetermined level, it is detected by a water level switch (not shown) and the water supply valve 17.1 is detected.
9 and stop the water supply operation.

In this state (as shown in the first diagram), the motor 7 is driven to rotate the pulsator 6, and the stirring action of the pulsator 6 performs washing operations in the same manner as in the conventional eIC washing machine. Note that rinsing is performed in the same manner as described above.

When washing (rinsing) is finished, the discharge valve 14 is opened and the pump 12 is operated to suck out the water and air in the washing tub 2 and discharge it from the discharge valve 14 to the outside of the machine via the drainage channel 9. Open the valve 33 to open the ventilation path 32 and the communication path 3.
By flowing outside air into the lid side space 28 through the passage 1 and the passage 3o, a drainage operation is performed, followed by a dewatering operation. During the dewatering operation, the air inside the washing tub 2 is sucked out and the internal pressure becomes negative.
6 moves downward, and finally presses and compresses the laundry to squeeze out moisture from the laundry (state shown in the second figure).

When dewatering is completed, the operation of the pump 12 is stopped, and the remaining water in the circulation path 10 and the water supply channel 16 is discharged to the outside of the machine via the drainage path 9 by opening the drain valve 15 and the water supply valve I7. By closing the third section and operating the vacuum pump 29, the air in the lid side space 28 is sucked out and the pressure is reduced. Then, the pressure inside the lid side space 28 becomes negative, and the pressing part 26 of the pressure-responsive body 24 moves upward and returns to its original upper position.

At this point, the vacuum pump 29 is stopped and the vent valve 3 is closed.
8 remains closed, air will not flow into the lid-side space 28, and therefore the pressing portion 26 of the pressure-responsive body 24 will be held at the upper position.

As described above (in this embodiment, the laundry can be dehydrated by pressing and compressing it using the atmospheric pressure applied to the pressing part 26 of the pressure-responsive body 24, and the rotating tank in the centrifugal dewatering method is omitted). Therefore, various problems caused by this tank can be solved.Furthermore, since water is supplied into the washing tub 2 without exhausting the air inside the washing tub 2 when water is supplied, there is no increase in the pressure inside the washing tub 2. There is no problem such as water leakage during water supply work.
It is also possible to adopt a water level detection method that detects the water level based on pressure changes.

(Effects of the Invention) As described above, according to the present invention, it is possible to perform dewatering without using a rotating tank, and also solves the problem during water supply, and also eliminates the limitation on the water level detection method. It is easy to put the dehydration method into practical use.

[Brief explanation of drawings]

FIG. 1 is a vertical cross-sectional configuration diagram showing the structure of a washing machine according to the present invention, and FIG. 2 is a vertical cross-sectional configuration diagram illustrating the dewatering operation state of the same. 2: Washing tank, 8: Water circulation type pressure reducing device, I6: Water supply channel, 1
7: Water supply valve, 18: Water supply channel, 19: Water supply valve, 21: Exhaust valve. Agent Patent attorney Takeshi Sugiyama (and 1 other person) Figure 1

Claims (1)

[Claims] 1. A pressure-responsive body consisting of a telescoping part and a pressing part provided at the lower part of the pressure-responsive body is provided, and the upper end side of the telescoping part of this pressure-responsive body is supported to seal the inside of the washing tub with the pressure-responsive body, and the washing tub is closed during spin-drying. In a washing machine that reduces the pressure inside the tub to create a negative pressure in the tub, the pressing part of the pressure-responsive body is moved downward, and the pressing part presses and compresses the laundry. What is claimed is: 1. A washing machine characterized in that the washing machine is provided with an exhaust valve that opens as the water level in the washing tub rises due to water supply.