JPH09285680A - Laundering method in continuous washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To completely prevent white laundry from staining by changing water in a tanks doing main laundering when a first white laundry is transferred to the said tank after colored laundry in the said tank are finished processing in a washing machine that has plural tanks where laundries are transferred from one tank to another. SOLUTION: When a first wad of colored laundries Lch is put in a tank V1, laundering is processed with a normal flow on a preparatory laundering area and with a reverse flow on a main laundering and a rinsing areas. Following valves of tanks on machine areas of the laundering proper and the laundering preparatory, namely, a water feed valve W1 of an initial tank V1, water feed valves W7 and W10 of final tanks V7 and V10, drain valves D2 of a final tank on the preparatory laundering area, D3 and D8 of initial tanks V3 and V8 are opened. And when the first wad of white laundry is started to be transferred from a final tank V2 on the preparatory laundering area to the initial tank V3 on the laundering proper area, a water feed valve W3 and drain valve D3 of the tank V3 are opened to exchange water in it, and water feed valves and drain valves of remaining tanks V4∼V7 are closed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washing method in a continuous washing machine, in which laundry is sequentially transferred to a plurality of washing tubs formed by axially partitioning the inside of an outer case. Laundry that may cause harmful effects such as color transfer to the laundry that is subsequently washed through the wash water (in this specification, "colored laundry" or simply "colored laundry")
After that), the present invention relates to a washing method for washing a laundry (in this specification, referred to as “white laundry” or simply “white laundry”) that may be adversely affected by the above-described color transfer.

[0002]

2. Description of the Related Art A continuous washing machine is provided with a horizontally placed cylindrical outer case, and the laundry loaded from one end portion in the axial direction is transferred while being axially washed. It has a structure to discharge from the other end. The inside of the outer case is divided into a plurality of washing tubs, and some of the divided washing tubs are combined to form a prewash region, a main washing region and a rinsing region from the upstream side. For example, in the one shown in the attached drawings, the inside of the outer case is divided into 10 washing tubs V1 ... V10, and two tubs V1 and V2 on the upstream side are a pre-wash area and five tubs V in the middle.
3 ... V7 is the main washing area, 3 tanks on the downstream side V8, V9, V
10 is a washing tub in the rinsing area.

Generally, in conventional washing machines of this type, prewash water is supplied to the first tank in the prewash area and flows out from the last tank in the prewash area, and is rinsed with the main wash area. In the area, the wash water is supplied from the last tank of each area and discharged from the first tank of each area. That is, if the flow of the laundry and the flow of the wash water are in the same direction, the flow is forward flow, and if the flow is in the reverse direction, the flow is counter flow. Conventionally, as shown in FIG. In the area and the rinse area, countercurrent RF was used for washing.

Such a continuous washing machine is mainly used for washing white goods such as sheets and towels in hotels and hospitals, and there is no problem if the laundry to be continuously introduced is only white goods. Although it does not occur, when a colored material that is dyed in a dark color is put between white objects, the dye elutes in the wash water,
This adheres to a white product that is put after the colored product, causing a problem of color transfer. This color transfer occurs in the main washing area where washing water containing detergent is heated by steam or the like to perform washing.

Therefore, in order to avoid this problem,
No. 30320 has been improved to switch the flow of washing water in the main wash region from countercurrent RF shown by a solid line in FIG. 16 to forward flow CF shown by a broken line when a white product is successively added to a colored product. A continuous washing machine has been proposed.

[0006]

In the improved continuous washing machine described above, when a white object put into the main washing area after a colored material moves, the washing water in the main washing area flows countercurrently.
If you switch from F to normal flow CF, the washing water after washing the colored items will not flow to the white items that you put in later,
It is possible to prevent color transfer to a white product that is thrown in later.
However, at this time, if the white product that has been previously put in the main wash area in front of (the downstream side of) the colored product remains, the washing water after the colored product is washed first by switching the washing water to the forward flow. There is a risk that it will flow toward the white goods that have been thrown in and cause color transfer.

Therefore, in order to completely prevent color transfer with the above-mentioned improved apparatus, when a white product introduced later enters the main washing region, all of the colored products are in the tank on the downstream side of the main washing region. In the apparatus of FIG. 16 in which the main washing area is provided with five washing tubs, at least four tanks of colored material must be continuously charged, and only one tank of colored material is required. If there is only one, there is a disadvantage that the three tanks in front of (or after) must be emptied and washed.

The present invention completely prevents the color transfer even when the amount of the colored product mixed with the white product to be washed is small, or when the white product and the colored product are alternately charged. An object is to obtain a continuous washing machine that can perform washing more efficiently.

[0009]

According to a first aspect of the present invention, there is provided a washing method for a continuous washing machine, wherein in a normal washing state, main washing is carried out in a counterflow in which washing water is transferred from a downstream side to an upstream side. In the continuous washing machine washing method that is performed, when the white laundry Lwh that is first put in after the colored laundry is transferred to the washing tub in the main washing area, the white laundry Lwh communicates with the tub of the destination. While opening the water supply valve and the drain valve to exchange the wash water in the tub of the transfer destination, until the first loaded white laundry is transferred to the last wash tub of the main washing area. The main washing region is subjected to pool washing with the water supply valve and drain valve connected to each washing tub closed, and this pool washing state is continued until all the baths in the main washing region become white.

The washing method in the continuous washing machine according to a second aspect of the present invention is a continuous washing machine in which, in a normal washing state, main washing is carried out in a countercurrent in which washing water is transferred from a downstream side to an upstream side. In the above washing method, when a white-colored laundry is loaded after the colored-colored laundry, the white-colored laundry L following the colored-colored laundry is added.
When emptiing one tank before the introduction of wh and the empty tank moves to the main washing area, the water supply valve and drainage connected to the empty tank while the other tank is washing. Open the valve to replace the wash water in the empty tank, and when the empty tank is in the main washing area, close the water supply valve and drain valve connected to the other tank in the main washing area to carry out pooling. It is characterized by performing.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 15 schematically shows a continuous washing machine to which the method of the present invention is applied. The illustrated washing machine has a partition wall 4 with an opening 3 for transferring laundry in the center.
Then, the inside of the outer case 1 is divided into 10 washing tubs V1 ... V10, the first and second washing tubs V1 and V2 are prewash areas, and the third to seventh washing tubs V3 ... V7 is the main washing area, and the eighth to tenth washing tubs V8 ... V10 are the rinsing areas. An outer case 1 is provided with an inner case 2 that rotates about its longitudinal axis, and the laundry is first
Laundry is sequentially transferred from the washing tub V1 side to the tenth washing tub V10 intermittently (the washing operation and the transfer operation are alternately repeated). The first washing tub V1 is provided with a laundry loading port 5, and the tenth washing tub V10 is provided with a laundry discharging port 6.

A water supply pipe W, a detergent supply pipe C, a steam supply pipe S, a recycled water supply pipe R and a drain pipe D are connected to the necessary ones of the washing tubs, and these pipes are connected to the water supply pipe. Valves W1 ... W7 and W10, detergent supply valves C1, C
4, C5 and C7, steam supply valves S3 ... S7 and drain valves D1 ... D8 are provided. The subscripts attached to the symbols of these valves indicate the numbers of the connected washing tubs.

The number of washing tubs formed in the washing machine and how the formed washing tubs are allocated to the prewash region, the main washing region and the rinsing region are not particularly limited in carrying out the method of the present invention. Also, there is no particular limitation on which tank the detergent or steam is supplied to. In an extreme example, the method of the present invention can be applied to an apparatus for washing without supplying detergent or steam at all.

Regarding the water supply pipe and drainage pipe and the water supply valve and drainage valve, the following points are considered. First, in order to perform countercurrent washing in the main washing area, it is essential to connect the water supply pipe W to the last tank V7 and the drain pipe D to the first tank V3 in the main washing area. In order to perform countercurrent or forward flow washing in the prewash region and the rinse region, a water supply pipe W is provided in one of the first tank and the last tank of each region, and a drain pipe D is provided in the other. Must be connected. Normally, prewashing is performed in a normal flow and rinsing is performed in a countercurrent, so the first tank V1 and the last tank V1
The water supply pipes R and W are connected to 10, and the drain pipe D is connected to the last tank V2 of the prewash section and the first tank V8 of the rinsing section.

In addition to the usual piping as described above, in order to carry out the method of the present invention, it is intended to prevent color transfer when the laundry in the tub is changed from white to colored. A water supply pipe W having a water supply valve and a drain pipe D having a drain valve need to be connected to all of the washing tubs. Usually, the color transfer is most likely to occur in the main wash area, and at least the water supply pipe W having the water supply valves W3 ... W7 in the washing tubs V3 ... V7 in the main wash area and the drain valves D3 ... D7. It is necessary to provide a drainage pipe D with.

In the apparatus shown in FIG. 15, in addition to the piping in consideration of the above, the first tank V1 and the second tank V2 are provided so that the method of the present invention can be carried out even in the prewash region.
Also, the water supply pipes R and W provided with the water supply valves W1 and W2 and the drainage pipe D provided with the drainage valves D1 and D2 are connected.

1 to 8 show a first embodiment of the method of the present invention. In these figures showing an embodiment, a laundry inlet, an outer case, a washing tub inside the outer case,
Only the water supply valve of the water supply pipe and the drainage valve of the drainage pipe connected to each tank are shown, and these members are denoted by the same reference numerals as in FIG. 15. Also, the circles shown in the washing tub are the blocks of the laundry, the white circles are the white ones, the hatched circles are the colored ones, and the symbol Lch is the first block of the colored ones and Lwh.
Indicates the first mass of white matter. The water supply valve and drainage valve are indicated by x and o marks superimposed on the line segment showing the respective pipes, o mark indicates that the valve is open, x mark indicates that the valve is closed. Indicates that

The first embodiment shown in FIGS. 1 to 8 shows an embodiment in which the method of the present invention is carried out only in the main washing region.
In FIG. 1, the first mass Lch of colored products is put in the first tank V1 after the white product. In this state, as in the case of normal washing, washing is performed in the prewash region in the forward flow, and in the main wash region and the rinse region in the counterflow. Therefore, the water supply valve W1 for the first tank in the prewash area, the water supply valve W7 for the last tank in the main wash area,
The water supply valve W10 for the last tank in the rinse area, the drain valve D2 for the last tank in the prewash area, the drain valve D3 for the first tank in the main wash area, and the drain valve D8 for the first tank in the rinse area are opened, and other valves are provided. Are all closed.

In FIG. 2, a lump of laundry is sequentially fed from the state shown in FIG. 1, three lumps of colored products are successively put in, and then a lump of white product is put in again and then put in later. The first mass Lwh of white matter has been sent to the last tank V2 in the prewash area. From the state shown in FIG. 1 to the state shown in FIG. 2, there is no change in the above-mentioned valve opening / closing relationship. FIG. 3 shows a state in which the laundry block is being transferred from the state of FIG. 2 to the next tank. The first mass Lwh of white matter is about to move from the last tank V2 in the prewash area to the first tank V3 in the main wash area. At this time, the water supply valve W3 and the drainage valve D3 connected to the tank V3 to which the first mass Lwh of white goods is moving are opened, and the washing water in the tank V3 is exchanged. At the same time, the remaining tank V4 in the main wash area
Water supply valves W4 ... W7 and drain valves D4 ... D7 connected to V7 are closed. The opening / closing relationship of the valves in the prewash area and the rinse area does not change.

FIG. 4 shows the first lump Lw of white matter in the first tank V3 of the main washing area in which the washing water has been exchanged by the process of FIG.
It shows a state where h is moved and washing is continued. In this state, the water supply valve W3 ...
-W7 and drain valves D3 ... D7 are all closed. That is, in each of the tanks V3 ... V7 in the main washing area, the wash washing is carried out without advancing the wash water to another tank.

FIG. 5 shows a state in which the lump of laundry is moving from the state of FIG. 4 to the next tub. The first mass Lwh of white matter that was thrown in later was the third tank V3 to the fourth tank V4.
Trying to move to. At this time, the water supply valve W4 and the drain valve D4 connected to the fourth tank V4 are opened, and the tank V4
Replace the wash water in. Other water supply valves W3 and W5 in the main wash area
..W7 and drain valves D3, D5 ... D7 remain closed. The opening / closing relationship of the valves in the prewash area and the rinse area does not change.

FIG. 6 shows a state in which the transfer of the lump of laundry has been completed and the washing is continued from the state of FIG. In this state, as in the state of FIG. 4, the water supply valve W3
..W7 and drain valves D3 ... D7 are all closed to perform pooling.

In this way, when the first mass Lwh of white matter thrown after the colored matter passes through the main washing area,
The water supply valve and the drain valve of the tub to which the first mass Lwh of white matter is to be transferred are opened, and the wash water of the tub, that is, the wash water in which the dye is eluted by washing the colored product, is discharged, New wash water is supplied, and the first white lump Lwh is thrown into the new wash water.

That is, the wash water in which the colored product is washed by countercurrent or pool washing is drained immediately before the first mass Lwh of white product is put in and is replaced with new wash water. There is no risk of color transfer to the lump Lwh. Since the white matter following the first block Lwh of white matter is pooled by the washing water used to wash the white matter, there is naturally no risk of color transfer.

FIG. 7 shows the first mass Lwh of white matter that was thrown in later.
Shows the state of being transferred to the last tank V7 in the main washing area. In this state, the water supply valve W7 and the drain valve D7
And are opened, and the washing water in the last tank V7 in the main washing area is replaced.

In the state shown in FIG. 8 in which the first mass Lwh of white matter has moved to the last tank V7 in the main washing area, there is no risk of color transfer in the main washing area. With the water supply valve W7 and the drain valve D3 of the first tank open,
That is, the washing is continued in the normal state where the main washing area is returned to the countercurrent. Then, when the countercurrent is switched to, the washing water in the first tank V3 of the most used main washing area (where the washing has been performed for a long time) is sequentially drained, and the last tank V7 in the newest main washing area is washed. Since the water flows to the tank on the drain side in order, it is possible to minimize the waste of washing water due to the switch to pool washing on the way.

When prewashing in a normal flow, the transfer of the wash water in the same direction as the wash water and the strong washing action in the rinsing region do not cause color transfer compared to the main washing region. The risk of occurrence is small, and therefore, it is not necessary to carry out the method of the present invention in the prewashing area and the rinsing area. It is preferred to carry out the method of the invention.

In the above-described first embodiment, when the first mass Lwh of white matter put after the colored material moves from one tub to another, the wash water in the destination tub is replaced. . Generally, the time required for the transfer is shorter than the time required for replacing the wash water in the tub, and thus it is difficult to completely replace the wash water in the transfer destination tub during the transfer. This difficulty is due to the tank at the transfer destination (the colored items are still being washed) shortly before the transfer is started.
From the start of the washing water exchange, and even after the transfer is completed, continue the washing water exchange state (the state that the water supply valve and drain valve of the tank is open) for a predetermined time to perform more complete washing water exchange It is also possible to do so. But a more preferred method is
As shown in the next embodiment, an empty area for one tank is provided between the colored material and the first mass of white material that follows, and while washing is performed in the other tank, This is a method of replacing the wash water in the empty tank.

9 to 14 show an embodiment of the more preferable method described above. In the state of FIG. 9, the last lump Lce of colored objects is transferred to the second tub V2, and at this time, the first tub V1 is an empty tub in which laundry is not loaded. The water supply valve W1 and the drainage valve D1 of the first tank are opened to exchange the wash water,
The drain valve D2 of the second tank is closed, and the second tank is being washed. And the laundry was transferred to the next tank
In the state shown in 0, the first lump Lwh of white goods is put into the first tank in which the wash water has been exchanged. And at this time the first tank V
The water supply valve W1 and the drainage valve D1 of No. 1 are closed to perform the pool washing, and the water supply valve W2 and the drainage valve D2 of the empty tank V2 between the last color mass Lce and the first white mass Lwh. The wash water is drained after the and are opened and the colored items are washed.

This empty tank is the first tank V in the main washing area.
At the stage of FIG. 11 which has moved to 3, the prewash region returns to the original forward flow state, and the supply valve W3 and the drain valve D3 of the empty tank V3 are returned.
The wash water is exchanged by opening and, and the water supply valves W4, ... W7 and the drain valves D4, ... Next, in the state of FIG. 12 in which the empty tank has moved to the fourth tank, the water supply valve W4 and the drain valve D4 of this fourth tank are opened, the washing water of the fourth tank is exchanged, and the main washing area The water supply valves W3, W5 ... W7 and the drainage valves D3, D5 ... D7 of the other tanks are closed, and pool washing is performed in these tanks. When an empty tank moves like this,
The water supply valve and the drain valve connected to the tub are opened, and the wash water in the empty tub is exchanged while the other tub is being washed. In the meantime, in the other tank in the main washing area, pool washing is performed with the water supply valve and the drain valve closed.

In this way, after the empty tank has moved to the last tank V7 in the main washing area and the washing water in that tank has been exchanged, the empty tank has moved to the rinsing area, as shown in FIG. The main washing is resumed in the normal counterflow in which the water supply valve W7 of the last tank in the main washing area and the drain valve D3 of the first tank are opened.

According to the second embodiment, the washing water may be exchanged while the washing is being performed in the other tub, so that sufficient time can be secured for the exchange of the washing water. can do. In the above explanation, the water supply valve and the drain valve are opened and closed at the same time to exchange the wash water.However, the drain valve is opened first to drain the wash water from the tub, and then the drain water is drained. Of course, it is also possible to replace the wash water by closing the valve and opening the water supply valve to supply new wash water into the tub.
It goes without saying that such an exchange method is more preferable.

In the second embodiment, the washing water is exchanged also in the prewash region, but as described above, the prewash region may always be washed in the forward flow state.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a first state of the first embodiment.

FIG. 2 is a schematic diagram showing a second state of the first embodiment.

FIG. 3 is a schematic diagram showing a third state of the first embodiment.

FIG. 4 is a schematic diagram showing a fourth state of the first embodiment.

FIG. 5 is a schematic diagram showing a fifth state of the first embodiment.

FIG. 6 is a schematic diagram showing a sixth state of the first embodiment.

FIG. 7 is a schematic diagram showing a seventh state of the first embodiment.

FIG. 8 is a schematic diagram showing an eighth state of the first embodiment.

FIG. 9 is a schematic diagram showing a first state of the second embodiment.

FIG. 10 is a schematic diagram showing a second state of the second embodiment.

FIG. 11 is a schematic diagram showing a third state of the second embodiment.

FIG. 12 is a schematic diagram showing a fourth state of the second embodiment.

FIG. 13 is a schematic diagram showing a fifth state of the second embodiment.

FIG. 14 is a schematic diagram showing a sixth state of the second embodiment.

FIG. 15 is a view showing an example of the structure of a continuous washing machine capable of carrying out the method of the present invention.

FIG. 16 is a schematic diagram showing an example of a conventional method.

[Explanation of symbols]

 Lwh laundry

Claims (2)

[Claims] 1. In a washing method of a continuous washing machine, in which a washing water is washed in a countercurrent direction in which washing water is transferred from a downstream side to an upstream side in a normal washing state, a washing method is first performed after a colored laundry is washed. When the loaded white laundry (Lwh) is transferred to the washing tub in the main washing area, the water supply valve and the drain valve communicating with the tub of the transfer destination are opened and the washing water of the tub of the transfer destination is opened. In addition to replacing the above, until the first white laundry loaded above is transferred to the last washing tub in the main washing area, a water supply valve and a drain valve connected to each washing tub in the main washing area. A washing method in a continuous washing machine, characterized in that the washing is performed in a closed state, and the washing is continued until all the tanks in the main washing area become white. 2. In a washing method of a continuous washing machine in which washing water is washed in a counter-current in which washing water is transferred from a downstream side to an upstream side in a normal washing state, in a washing method of a colored laundry, white washing is successively performed. When loading laundry, empty one tank before loading the white laundry (Lwh) following the colored object, and when the empty tank moves to the main wash area, use another tank. While the laundry is being washed, open the water supply valve and drain valve connected to the empty tub to replace the wash water in the empty tub, and when the empty tub is in the main washing area, Characterized in that the water supply valve and the drain valve which are connected to other tanks in the washing area are closed to carry out reservoir washing.
Washing method in continuous washing machine.