JPH1121955A - Recycling system of water - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the usage of city water by recovering comparatively clean water used in the rinsing process of washing works and reutilizing the water in the next washing process. SOLUTION: Washing works consist of two-time washing processes and three-time rinsing processes, and only water employed in the last rinsing process is recovered into a recycling tank 5. Water used in the third rinsing process is forwarded into a water storage tank 6 from a recycling pipe 3 through a solenoid valve 3a, and sent and stored into the recycling tank 5 by a lifting pump 7a. Water stored in the recycling tank 5 is employed only in the first washing process in the two-time washing processes, and city water is utilized in the second washing process and rinsing process. Water of 0.4 tons is used per one-time washing process and rinsing process, and water of 0.4 tons in water of approximately 2 tons consumed in one-time washing works is stored in the recycling tank 5 when two-time washing processes and three-time rinsing processes are conducted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water recycling system for reducing the amount of tap water used in a washing operation.

[0002]

2. Description of the Related Art Conventionally, when washing, fresh tap water is used for both washing and rinsing.

[0003]

A large amount of water is required for a business-level laundry operation at a company level. However, the total amount of water used is regulated by the Environment Agency, which limits the amount of tap water used. Generally, about 2 tons of water are required to wash a laundry having a dry weight of 200 kg. For example, in an area where the use of 200 tons of tap water per day is permitted, laundry items of “200 kg × 200 tons / 2 tons = 20 tons” or more cannot be washed in one day. . Even if a large amount of laundry is to be washed using a plurality of washing machines, the washing operation does not proceed unless tap water is available. In view of the above circumstances, an object of the present invention is to provide a water recycling system that reuses relatively clean rinse water.

[0004]

According to the present invention, in a washing operation, relatively dirty water used in a washing step is drained, and relatively clean water used in a rinsing step is collected in a recycling tank. A water recycling system characterized in that the amount of tap water used is reduced by reusing water in a washing step when the next laundry is washed.

[0005]

FIG. 1 shows an overall schematic diagram of a water recycling system according to the present invention. A drain pipe 2 provided with a solenoid valve 2a in the middle of the washing machine 1 and a solenoid valve 3 in the middle
The upper ends of the recycle pipe 3 and the water supply pipe 4 provided with a are connected.

The solenoid valves 2a and 3a are controlled by a CPU (not shown), and are opened by applying a signal from the CPU during dehydration. During the washing operation in which no signal is applied from the CPU, the solenoid valves 2a and 3a are both closed.

[0007] The lower end of the recycling pipe 3 communicates with the water storage tank 6. A pipe 7 provided with a pump 7a on the way
Are connected at one end. The other end of the pipe 7 communicates with the recycle tank 5.

The bottom of the recycle tank 5 is connected to one end of a pipe 8 provided with a solenoid valve 8a, a pump 8b and a check valve 8c which allows water to flow only in the direction indicated by the arrow A in FIG. . In addition, a steam pipe 9 having an electromagnetic valve 9 a communicates with the recycle tank 5, and steam for heating the recycle water stored in the recycle tank 5 is supplied.

Further, a water pipe 10 is connected before the check valve 8c of the pipe 8. In the middle of the water pipe 10, a normally closed solenoid valve 10a controlled by a CPU (not shown) is provided. The CPU applies a signal to the solenoid valve 10a when supplying tap water into the washing machine 1, and opens the solenoid valve 10a. The other end of the pipe 8 is connected to the water supply pipe 4 and the water pipe 10.

When the pump 8b is driven, the recycle water flows through the pipe 8 in the direction of arrow A through the check valve 8c. The recycled water does not flow toward the water pipe 10 because it is blocked by the solenoid valve 10 a, but flows into the washing machine 1 from the water supply pipe 4. When the electromagnetic valve 10a is opened by a CPU (not shown), the tap water is blocked by the check valve 8c and does not flow toward the pipe 8, but flows into the washing machine 1 via the water supply pipe 4.

[0011] The recycle tank 5 immediately after the start of the washing operation is not stored in water, and tap water is used in all washing operations until the water is stored. The washing operation includes two washing steps and three rinsing steps. Only the water used in the last rinsing step is collected in the recycling tank 5.

First, in the two washing steps and the first two rinsing steps, the solenoid valve 2a controlled by the CPU (not shown) is opened, and the used water in the washing machine 1 is discharged from the water pipe 2
Drained from

The water used in the third rinsing step is sent from the recycle pipe 3 to a water storage tank 6 disposed below the washing machine 1 via a solenoid valve 3a opened by a CPU (not shown). Further, water is sent and stored in the recycle tank 5 by the water pump 7a.

The water stored in the recycle tank 5 (hereinafter referred to as “recycle water”) is used only in the first of the two washing steps, and is used only in the first and second washing steps. The rinsing process uses tap water. Here, depending on the laundry, recycled water may be used in all of the washing steps, and tap water may be used in the rinsing process.

A CPU (not shown) executes a preset program described below. When performing the first washing step, the solenoid valve 8a is opened and the pump 8b is operated to send the recycled water into the washing machine 1 via the pipe 4. The recycled water sent at this time is heated by the steam pipe 9.

When the level of the recycle water in the recycle tank 5 is equal to or higher than a predetermined value, the solenoid valve 9a is opened, the heating steam is supplied to the steam pipe 9, and when the level of the recycle water falls below the predetermined value, the solenoid valve 9a closes The heating steam is set so as not to be supplied to the steam pipe 9. Here, the heating steam may be supplied to the steam pipe 9 regardless of the level of the recycled water.

When the washing operation is completed in the washing machine 1, a signal from a CPU (not shown) is applied to the solenoid valve 2a to open the solenoid valve 2a, drain the water after washing, and then close the solenoid valve 2a. Next, a signal is applied from a CPU (not shown) to the solenoid valve 10a to open the solenoid valve 10a, and a predetermined amount (400 Kg)
After the tap water has flowed into the washing machine 1, the solenoid valve 10a is closed.

The second washing is performed, and the washed water is drained through the water pipe 2 and the solenoid valve 2a. After draining, solenoid valve 1
0a is opened, a predetermined amount (400 kg) of tap water flows into the washing machine 1, and the solenoid valve 10a is closed. In the washing machine 1, the first rinsing is performed, and after completion, the solenoid valve 2 a is opened, and the rinse water is drained from the water distribution pipe 2.

Next, the second rinsing is performed in the same procedure as the first rinsing, and when the third rinsing is completed,
The electromagnetic valve 3a is opened, and the rinse water is discharged from the washing machine 1 to the water storage tank 6 via the recycling pipe 3.

When the water level in the water storage tank 6 rises above a predetermined value, the pump 7a operates according to a signal from the CPU, and the water storage tank 6
The water inside is sent to the recycle tank 5 and stored. The water stored in the recycle tank 5 is heated by the steam pipe 9.

The water used is the washing step and the rinsing step 1.
The washing time is about 0.4 tons. If two washing steps and three rinsing steps are performed, about 2 tons of water is consumed in one washing operation, and 0.4 tons of water is recycled in the recycling tank. 5 is stored.

For example, when a recycling tank 5 having a maximum water storage of 6 tons is used, the recycling tank 5 becomes full after 15 washing operations. 2 per washing operation
Since tons of water are required, the recycle tank 5 has a sufficient amount of water to perform three washing operations. Therefore, in this case, it is possible to process the laundry to be increased by 4 tons in dry weight as described below.

Assuming that 200 tons of tap water can be used per day, if the washing operation is performed only with tap water, only the laundry having a dry weight of 20 tons can be washed. Then, it becomes possible to wash the laundry having a dry weight of 24 tons.

Some laundry items require only two rinsings, in which case 200 tap water can be used a day.
Assuming that the load is 25 tons, the laundry having a dry weight of 25 tons can be washed, and the laundry having a dry weight of 5 tons can be processed.

In the above description, only the water used in the final rinsing step is used as recycled water. However, if the water used in the two rinsing steps is used as recycled water, the dry weight is reduced to 30%. It is also possible to wash tons or more of laundry.

As shown in FIG. 1, if the steam pipe 9 is provided at the bottom of the recycling tank 5 so as to be open, the recycled water can be heated, and the washing effect in the washing operation can be improved.

As shown in FIG. 2, a branch pipe 12 provided with a three-way valve 11 may be used in place of the water distribution pipe 2, the recycle pipe 3 and the solenoid valves 2a, 3a in FIG. Three-way valve 1
1 is switched by a CPU (not shown).

In this case, the water used in the cleaning step and the water used in the rinsing other than the last rinsing are drained from the pipe 13, and only the water used in the last rinsing can be stored in the water tank 6 from the pipe 14. Then, the three-way valve 11 is switched.

The water tank 6 and the pump 7a are installed at a relatively low position in the washing machine 1, and the recycle tank 5
It may be provided when it is difficult to send water to the washing machine 1
If is installed at a position higher than the recycling tank 5, the water storage tank 6 and the water pump 7a are unnecessary, and water may be directly sent from the washing machine 1 into the recycling tank 5.
You.

[0030]

The amount of water that can be used per day is limited by law, and even if the amount of tap water used is the same as before, the laundry can be washed about 20 to 50% more than before. Can be.

Even if the same amount of tap water is used,
Since the amount of laundry that can be processed is increased, it is possible to reduce the cost of washing and running water.

[Brief description of the drawings]

FIG. 1 is an overall schematic diagram of a water recycling system of the present invention.

FIG. 2 is an overall schematic diagram showing a modification of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Washing machine 2 Drain pipe 2a Solenoid valve 3 Recycle pipe 3a Solenoid valve 4 Piping 5 Recycle tank 8 Pipe 8a Solenoid valve 8b Pump 8c Check valve 10 Water pipe

Claims (1)

[Claims] 1. In a washing operation, relatively dirty water used in a washing step is drained, relatively clean water used in a rinsing step is collected in a recycling tank, and the collected water is used for the next laundry. A water recycling system characterized by reducing the amount of tap water used by reusing it in the washing process when washing.