JPS6216672B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in dry cleaning machines.

Normally, when washing clothes etc. using a dry cleaning machine, the clothes etc. are placed in a washing drum that is rotated by a drive source, and after washing is done at low speed, the washing drum is rotated at high speed and centrifuged. The liquid is removed by force, but when the liquid is removed, clothes, etc. are unevenly distributed in the washing drum and are not evenly distributed, so a large excitation force is generated on the washing drum due to the uneven load of clothes, etc., which shortens the life of the machine. This not only shortens the length of the machine, but also has the disadvantage that the vibrations of the machine propagate to the surrounding area through the installation ground, contributing to vibration pollution.

Conventionally, countermeasures against this problem can be broadly classified into the following three types.

(i) Reduce the uneven load of clothes, etc. in the washing drum.

(ii) Isolate vibrations to the ground where the machine is installed.

(iii) Reinforce the installation ground.

As an example of countermeasures for (i) above, in the case of a cleaning machine with a horizontal rotating shaft, there is a countermeasure to maintain the centrifugal acceleration of approximately 1G of centrifugal acceleration of the clothes in the washing drum for a certain period of time before removing liquid. Although this measure can reduce the unbalanced load on clothing, etc. by almost half, sometimes a large unbalanced load may occur.
This is not a sufficient measure.

Further, as an example of the above-mentioned measure (ii), there are known ones in which the entire machine is elastically supported by a vibration-isolating frame composed of a spring and a damper, or in which only the washing drum portion is elastically supported. With this measure, the amount of vibration transmitted from the machine to the ground is reduced to a fraction of that of the conventional method, eliminating the problem of vibration pollution. However, on the other hand, the vibration amplitude of the whole machine or the washing drum, which is elastically supported, increases, and the machine Problems such as internal piping leakage and loosening of fastened parts occur, and these countermeasures cannot be said to be sufficient.

In addition, an example of the above measure (iii) is to install the machine on the foundation of a large concrete block to reduce ground vibration, but in order to obtain a sufficient vibration-proofing effect, the cost required for foundation work is The disadvantage was that the amount of data was enormous.

The present invention was proposed for the purpose of providing a dry cleaning machine capable of eliminating all of the drawbacks of the conventional dry cleaning machines and the problems of countermeasures thereof, and the dry cleaning machine rotates around a horizontal axis. A plurality of sealed chambers attached to a washing drum, a detection means for detecting a vibration state of the washing drum, and a fluid supply means for supplying a predetermined amount of fluid to a predetermined sealed chamber based on the detection result of the detection means. At the same time, the centrifugal acceleration received by the clothes, etc. in the washing drum is greater than 1G, and the unbalanced load is corrected by vibration detection and fluid supply at an intermediate rotational speed lower than the deliquing rotational speed.
A dry cleaning machine characterized by accelerating to a delitting rotation speed to remove liquid, and further decelerating to an intermediate rotation speed and discharging a fluid for correcting unbalanced load by supplying compressed air to the sealed chamber. This is related to.

The present invention will be specifically explained below with reference to embodiments shown in FIGS. 1 to 3.

In FIG. 1, 1 is a rotating washing drum;
2, 2', 2'' are attached to the outer periphery of the washing drum 1.
As shown in the figure, there are a plurality of sealed chambers (in this example, 3) arranged at equal intervals along the circumferential direction of the drum 1, 3 is a rotating shaft of the washing drum 1; The washing drum 1, which is rotatably supported by bearings 4 and 5, is rotated by a drive source (not shown) via a pulley 6 fixed to its outer end, and fixed to its inner end, is moved into a closed room. 2, 2', and 2'' to rotate in a predetermined direction.7, 8, 9
1 is a liquid rotary joint disposed on the outer periphery of the rotating shaft 3, 10 is an air rotary joint, and 11, 11', and 11'' are located inside the rotating shaft 3, respectively, as shown in FIG. 12 is an air passage provided in the center of the rotating shaft 3 along its axial direction (direction perpendicular to the plane of the paper in the figure), and its outer end is The inner end communicates with the air rotary joint 10, and the inner end communicates with the sealed chambers 2, 2', 2''. Reference numeral 13 denotes a vibration detection means (vibration detector) mounted on the outside of the top of the casing K that surrounds the washing drum 1. Vibrations caused by an unbalanced load 14 of clothing or the like in the washing drum 1 are detected by the vibration detection means 13. Ru. (See Figure 3) 15 is the casing K as shown in Figure 1.
The reference point detector attached to the same reference point detector 1.
5 gives the signal of the reference point on the washing drum 1. Reference numeral 16 denotes a calculator, which is connected to the vibration detection means 13 and also to the liquid valves 17 and 1.
7', 17'' and an air valve 18, respectively.Liquid valves 17, 1
7' and 17'' are the sealed chambers 2, 2', and 2', respectively.
By opening the respective liquid valves 17, 17', 17'' for a required period of time, the liquid rotary joints 7, 8, 9, liquid passages 11, An arbitrary amount of liquid can be introduced into each of the sealed chambers 2, 2', 2'' through 11', 11''.
In addition, after the liquid removal is completed, while the liquid in each sealed chamber 2, 2', 2'' is being subjected to centrifugal acceleration of 1G or more,
The air valve 18 opens, and each sealed chamber 2,
Compressed air is forced into the sealed chambers 2', 2'', so that the liquid in each of the sealed chambers 2, 2', 2'' can be forcibly discharged to the outside.

An embodiment of the dry cleaning machine of the present invention is as follows:
With the above structure, vibration measurement is performed at a washing drum rotation speed (intermediate dewatering rotation speed) where the centrifugal acceleration received by the clothes, etc. in the washing drum is greater than 1G, and the rotation speed of the washing drum is low enough that vibration is not a problem. Do this. FIG. 5 shows vibration detection values and reference point position signals obtained by the vibration detector 13 and reference point detector 15 when there is an unbalanced load 14 such as clothing at the position shown in FIG. In the figure, T indicates the time it takes for the washing drum to rotate once, and t indicates the time difference between the detection of the maximum vibration value and the detection of the reference point. 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 = C x E where C: constant determined by experiment E: value converted to electrical quantity of vibration amplitude Angle θ (rad) = α - t/T x 2π where α: reference point detector and vibration Angle of the Detector In order to balance this eccentric load, the amount of liquid that should be introduced into each sealed chamber 2, 2', 2'' provided on the outer periphery of the washing drum is determined by vector calculation shown in Fig. 6. You can get it by twisting it.

In Figure 6, F: Balanced load due to the liquid that entered chamber 2 (F = 0 in Figure 6) F': Balanced load due to the liquid that entered chamber 2' Kg, F'' :Balanced load (Kg) due to the liquid that has entered chamber 2'' As shown in Figure 7, clothing, etc. contains a large amount of liquid in the intermediate deliquing rotation, and the amount of unbalanced load is greater than when moving to the deliquing rotation. is big. In the example of the automatic balancing time schedule shown in Figure 8, the idea is to balance the unbalanced load at the time of transition to the dewatering rotation in advance at the intermediate dewatering rotation, and In order to balance the unbalanced load, each chamber 2,
Balance loads P, P′ due to the liquid put in 2′, 2″,
P″ can be found as follows.

P=K×F P'=K×F'P"=K Calculate, open each valve 17, 17', 17'' for the required time and
2', 2'' is filled with liquid to correct the unbalance caused by the unbalanced load.

This operation is continued two or three times if necessary, and when the residual unbalanced load becomes less than a specified value, a transition to liquid removal rotation is performed. Note that the periodic value here is not a constant value, but a 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, etc. is further removed and the residual unbalanced load becomes large again, so vibration measurement is performed during the liquid removal rotation to correct the unbalance.

After the liquid removal is completed, the rotation shifts to the intermediate liquid removal rotation again, and with the liquid in each chamber 2, 2', 2'' sticking to the outer wall, each valve 17, 17', 17'' is opened, and the air valve is opened. By sending compressed air into each chamber 2, 2', 2'' through 18, liquid is carried out from each chamber.

FIG. 10 shows another example of the time schedule for automatic balancing of the cleaning machine to which the present invention is applied, but in this example, after the washing is finished, the cleaning machine is immediately shifted to the dewatering rotation to correct the unbalance. In this case, calculate the amount of liquid to be put into each chamber 2, 2', 2'' from the above-mentioned values of the balanced loads F, F', F'',
Each liquid valve 17, 17', 17'' can be opened for a required period of time to allow liquid into each chamber to correct the imbalance.

Fig. 9 shows the difference in practical effect between the cleaning machine to which the present invention is applied and the conventional one. The one-dot chain line shows the level of ground vibration when the present invention was implemented, and the two-dot chain line shows the level of ground vibration in the conventional case. As can be seen from this figure, according to the present invention,
The amount of residual unbalance is reduced to less than 1/5 compared to the conventional method, and the ground vibration level is reduced by more than 14 dB, completely solving the ground vibration problem.

In addition, after the liquid removal is completed, the liquid in each sealed chamber 2, 2', 2'' is forcibly discharged outside, so in a cleaning machine that performs hot air drying after liquid removal, excess heat is It has the advantage of not being consumed.

[Brief explanation of the drawing]

1 to 3 are schematic explanatory diagrams of one embodiment of the present invention. FIG. 1 is an overall system diagram showing main parts in longitudinal section, and FIG. 2 is a cross section taken along line AA in FIG. 1. Figure 3 is a sectional view taken along the line B-B in Figure 1, Figure 4 is a graph showing the relationship between the number of rotations of the washing drum and the vibration level transmitted to the ground, and Figure 5 is a graph showing the relationship between the number of rotations of the washing drum and the level of vibration transmitted to the ground. Figure 6 is a diagram showing the vibration detection value and the position signal of the reference point obtained when there is an unbalanced load, Figure 6 is a diagram showing the vector of the balanced load amount due to the liquid supplied to each sealed chamber,
Fig. 7 is a graph showing the relationship between deliquid time and the amount of clothing + liquid; Fig. 8 is a graph showing an example of an automatic balancing time schedule when the present invention is applied; Fig. 9
The figure is a graph showing a comparison of the washing time, unbalanced load, and vibration level between the case where the present invention is applied and the conventional case, and FIG. 10 is a diagram showing another example of the automatic balancing time schedule. 1: Washing drum, 2, 2', 2'': Closed room, 3:
Rotating shaft, 4, 5: Bearing, 7, 8, 9: Rotary joint for liquid, 10: Rotary joint for air, 11, 11', 11'': Liquid passage, 12:
Air passage, 13: Vibration detection means, 14: Unbalanced load,
16: Calculator, 17, 17', 17'': Liquid valve, 18: Air valve.

Claims (1)

[Claims] 1 A plurality of closed chambers attached to a washing drum rotated around a horizontal axis, a detection means for detecting the vibration state of the washing drum, and a plurality of closed chambers attached to a specified closed chamber based on the detection results of the detection means. It is equipped with a fluid supply means for supplying a fixed amount of fluid, and at intermediate rotation speeds where the centrifugal acceleration received by clothes, etc. in the washing drum is greater than 1G and lower than the deliquing rotation speed, vibration detection and unbalanced load due to fluid supply are provided. After the correction, the fluid for correcting the unbalanced load is discharged by accelerating to the delitting rotation speed to perform deliquing, and further decelerating to an intermediate rotation speed and supplying compressed air to the sealed chamber. A dry cleaning machine featuring