JPS6216673B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dry cleaning machine that can be applied to industrial washing machines and household washing machines.

In a washing machine, clothes are placed in a drum, and after washing, the drum is rotated at high speed to remove liquid using centrifugal force. However, when removing liquid, the clothes are not evenly distributed in the drum, and the unbalanced load on the clothes causes large vibrations. Power was generated, shortening the life of the machine, and vibrations were transmitted through the ground to the surrounding area, causing vibration pollution. However, conventional countermeasures against this problem can be roughly divided into the following three types.

(a) Reduce unbalanced loads on clothing.

(b) Block vibrations transmitted to the ground.

(c) Reinforce the ground.

First, as an example of (a), the number of rotations (balance rotation) at which the clothes in the rotating drum are subjected to a force of approximately 1G (G: gravitational acceleration) due to centrifugal force after washing and before dehydrating.
There are measures to keep it for a certain period of time. Although this measure nearly halved the unbalanced loads on clothing, large unbalanced loads sometimes appeared, so it was not a perfect countermeasure.

Next, as an example of (b), the entire machine is elastically supported by a vibration-proof stand made up of springs and dampers.
Alternatively, it is known that only the drum portion is elastically supported. With this measure, the amount of vibration transmitted from the machine to the ground was reduced to about 1/5, and the problem of vibration pollution was solved, but the vibration amplitude of the elastically supported machine or drum part increased, and the piping inside the machine There were drawbacks such as leakage and loosening of fastened parts.

As an example of (c), there is a measure to reduce ground vibration by installing large concrete blocks on the ground, but if you want to get the full effect, the cost of foundation work will be large. It was hot.

The present invention has been proposed in order to solve the above-mentioned conventional drawbacks, and includes a plurality of sealed chambers provided in a washing drum and filled with a predetermined amount of fluid in advance, and a communication pipe that communicates the sealed chambers with each other. , a detection device for detecting the vibration state of the washing drum, and a predetermined amount of compressed air is supplied to each of the sealed chambers based on the detection result of the detection device, and the compressed air is moved through the communication pipe to fill each of the sealed chambers. It is an object of the present invention to provide a dry cleaning machine which has a fluid control device that adjusts the amount of fluid in the dry cleaning machine, and can suppress vibration by minimizing residual unbalanced force.

The present invention will be explained below with reference to the embodiments shown in the drawings.
In Figures 1 to 3, 1 is a rotating drum, 2, 2
a and 2b are sealed chambers provided in the rotating drum, 3 is a shaft, 4 and 5 are bearings, 6 is a pulley,
7, 8, 9 are rotary joints for compressed air; 10, 10a, 10b are communication spaces between closed chambers;
Reference numerals 11, 11a and 11b indicate air passages machined in the shaft, 12 a vibration detector, 13 a position detector, 14 a calculator, and 15, 15a and 15b compressed air valves. Further, vibrations caused by the unbalanced load 16 are detected by the vibration detector 12. A position detector 13 also provides a signal of a determined position on the drum.

FIG. 5 shows an example of the obtained signal. Chambers 2, 2a, 2b provided on the outer periphery of the drum
A liquid is pre-filled in each chamber, approximately 2/3 of the volume of each chamber, and the compressed air valves 15, 15a, 15b
By opening the chamber for a certain period of time, the air pressure in each chamber changes, and it is possible to move an arbitrary amount of liquid between each chamber.

Next, to explain the operation, FIG. 8 shows an example of an automatic balancing time schedule using the apparatus of the present invention. The centrifugal acceleration experienced by the clothing in the drum is
Vibration measurements are performed at a rotation speed greater than 1G and low enough that vibration is not a problem (intermediate deliquing rotation).

Figure 5 shows the detected vibration values obtained when there is an uneven load on clothing at the position shown in Figure 3, and the signal at the reference point, where T is the time for one rotation of the drum, and t is the maximum vibration. This is the time difference between value detection and reference point detection. Further, from FIG. 5, the magnitude of the unbalanced load and the angle θ between the reference point and the unbalanced load are determined as follows.

Unbalanced load amount = C x E C: Constant obtained from experiment E: Value converted into electrical quantity of vibration amplitude Angle θ (rad) = α - t/T x 2π α: Between reference point detector and vibration detector Angle The amount of liquid that should be placed in each chamber provided on the outer periphery of the drum in order to balance this unbalanced load can be obtained by performing vector calculations as shown in FIG.

In Figure 6, UB is the unbalanced load (Kg) on the clothing. In addition, the balanced load due to the liquid that has entered chamber F...2 (F=0 in Fig. 6) F'...in chamber 2a F''...in chamber 2b Also, Fig. 7 As shown in Fig. 8, the clothing contains a large amount of liquid during the intermediate deliquid rotation, and the amount of unbalanced load is larger than when the transition to the deliquid rotation occurs. The idea is to balance the unbalanced load when transitioning to deliquing rotation, and in order to balance the unbalanced load when transitioning to deliquing rotation, the balanced loads P, P', P due to the liquid put into each chamber are taken. ” is calculated as follows.

P=K×F P′=K×F′ P″=K×F″ K: Constant determined by experiment From this value, calculate the amount of liquid to be sealed in each chamber, ) is opened for the required time, the air pressure in each chamber is changed, and the liquid is moved to correct the imbalance. This operation is continued two or three times if necessary, and when the amount of residual unbalanced load becomes less than a specified value, a transition to liquid removal rotation is performed.

Note that the specified value here does not mean a fixed value;
It is the value obtained by multiplying the first detected unbalanced load amount (C×E) by a constant of 1 or less. After shifting to the liquid removal rotation, the liquid contained in the clothing is further removed and the residual unbalanced load increases again, so vibrations are measured during the liquid removal rotation and the unbalance is corrected.

FIG. 10 shows another example of an automatic balancing time schedule using the apparatus of the present invention. In this example, the unbalance is corrected by shifting to the deliquoring rotation immediately after washing is completed. In this case, the aforementioned F, F′,
The amount of liquid to be sealed in each chamber is calculated from the value of F'', each valve (15, 15a, 15b) is opened for the required time, and the air pressure in each chamber is changed to move the liquid. Corrections can be made.

FIG. 9 shows the effect of implementing the present invention.
In the figure, the solid line represents the amount of residual unbalance when the present invention is implemented, the broken line represents the amount of residual unbalance when the present invention is not implemented, the one-dot chain line represents the ground vibration level when the present invention is implemented, and the two-dot chain line represents the amount of residual unbalance when the present invention is implemented. Indicates the ground vibration level without implementation.

As can be seen in Figure 9, by implementing the present invention, the amount of residual unbalance was reduced to less than 1/5, and the ground vibration level was reduced by more than 14 dB, completely solving the vibration problem.

Since the present invention is configured as described in detail above, vibration isolation control of a dry cleaning machine can be easily performed by using compressed air that is available in general dry cleaning shops and factories.

Generally, in dry cleaning machines, it is difficult to use water as a fluid because of the risk of shrinkage of clothing due to mixing with the solvent, so a solvent is used as the fluid, but in this case, water is used as the fluid. Since it is necessary to use a pump or valve for the solvent to take in and out, the structure is more complicated than in the case of using compressed air in the present invention.

The present invention supplies a predetermined amount of compressed air to each sealed chamber based on the detection results of the detection device, and simply moves the fluid through the communication pipe. It becomes possible to correct the balance.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view of a dry cleaning machine showing an embodiment of the present invention, Fig. 2 is a sectional view from A to A in Fig. 1, Fig. 3 is a sectional view from B to B in Fig. 1, and Fig. 4 is a sectional view from A to A in Fig. 1. is a diagram showing the ground vibration level with and without the use of the present invention, Fig. 5 is an explanatory diagram showing vibration detection values and position signals, and Fig. 6 is a diagram showing each chamber around the drum outer circumference in order to balance the unbalanced load on clothing. An explanatory diagram showing an example of vector calculation of the amount of liquid to be put into the cloth, Fig. 7 is a diagram showing the relationship between the liquid removal time and the weight of liquid on clothing, and Fig. 8 shows an example of the time schedule in the present invention. Explanatory diagram, No. 9
The figure is an explanatory diagram showing the amount of residual unbalanced load at each time in Fig. 8, and Fig. 10 is an explanatory diagram showing an example different from Fig. 8 of the time schedule of automatic balancing in the present invention. . Explanation of the main parts of the diagram, 1...Rotating drum (washing drum), 2, 2a, 2b... Sealed room, 7, 8,
9...Rotary joint, 10, 10a, 1
0b...Communication pipe, 11, 11a, 11b...Air passage, 12...Vibration detector, 14...Computer,
15, 15a, 15b... Compressed air valve (fluid control device).

Claims (1)

[Claims] 1 A plurality of sealed chambers provided in a laundry drum and filled with a predetermined amount of fluid in advance, a communication pipe that communicates the sealed chambers with each other, a detection device that detects the vibration state of the washing drum, and the detection device and a fluid control device that supplies a predetermined amount of compressed air to each of the sealed chambers and moves it through the communication pipe to adjust the amount of fluid in each of the sealed chambers based on the detection result. Dry cleaning machine with special features.