JPH08173959A - Method for controlling water softening apparatus - Google Patents

Abstract

PURPOSE: To simplify a process control compared to the conventional five cycle control, to simplify the structure of a control valve and to decrease manufacturing cost and the rate of trouble by making the method for controlling a softening apparatus to be a four cycle control consisting of a water passing, a regenerating, a water washing and a water supplementing processes. CONSTITUTION: In a water passing process, after a raw water from a raw water line 6 is made to flow into a water collecting pipe 5 by operating a control valve 2, it is passed through a resin cylinder 1 by an upward flow and hard water is made to be soft water by means of an ion exchange resin 11 and the soft water is fed into each instrument. In a regenerating process, by switching the control valve 2, salt water in a salt water tank 3 is made to flow into the upper part of the resin cylinder 1 by downward flow through a salt water line 4 to regenerate the ion exchange resin 11 with the salt water and it is drained out of the system from a drainage line 8 through the water collecting pipe 5. In a water washing process, the control valve 2 is switched again and a raw water is made to flow into the upper part of the resin cylinder 1 by downward flow to wash the salt water. In a water supplementing process, a raw water is fed into a salt water tank 3 through the salt water line 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a water softener control method.

[0002]

2. Description of the Related Art As is well known, in the water supply line for cooling and heating equipment such as boilers, water heaters or coolers, it is necessary to prevent scale from adhering to the inside of the cooling and heating equipment. A device for doing so is connected, and among them, an automatic regenerating type water softener of a system of removing hardness by using an ion exchange resin is widely used. As shown in FIG. 3, this type of water softener is equipped with a salt water tank and a resin cylinder filled with ion exchange resin. By operating a control valve mounted on the upper part of the resin cylinder, (1) water flow Process,
(2) backwashing step, (3) regeneration step, (4) water washing step,
(5) Five cycles of the rehydration process are controlled.

[0003]

However, since the above-mentioned conventional control method is a 5-cycle control of water passing, backwashing, regeneration, water washing, and water replenishing steps, the structure of the control valve is complicated and many failures occur. The price is also high. Then, this invention aims at providing the control method of the water softener which can simplify a control method and the structure of a control valve.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and is a resin cylinder filled with an ion exchange resin, a salt water tank for regenerating the ion exchange resin, and the resin cylinder. Each of the water collecting pipe that is inserted through the central part of the control valve and that communicates with the control valve, the salt water line that connects the control valve and the salt water tank, the raw water line that is connected to the control valve, the soft water line, and the drain line. In a water softener having a structure for switching lines, a water-passing step of operating the control valve to feed raw water from the raw water line as an upward flow from a lower portion of the water collecting pipe, and the salt water. A process of regenerating the ion exchange resin, in which salt water in the tank is passed as a downward flow from the upper part of the resin cylinder, and raw water from the raw water line is supplied to the upper part of the resin cylinder. A rinsing step of passing water as downflow,
The present invention is characterized in that cycle control of a water replenishing process for replenishing raw water from the raw water line to the salt water tank is performed.

[0005]

According to the present invention, in the water passing step, the raw water is passed through the water collecting pipe from the bottom of the resin tube as an upward flow to float the resin layer to soften the hard water, and in the regenerating step from the salt water tank. Salt water flows down from the upper part of the resin cylinder as a downward flow to regenerate the ion exchange resin, and salt water is discharged from the drain line to the outside of the system. In the next water washing step, raw water is flowed down as a downward flow from the upper part of the resin cylinder, the resin is washed with water to discharge salt, and then discharged from the drain line to the outside of the system. Then, the raw water is supplied into the salt water tank through the salt water line.

[0006]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic explanatory view showing the structure of a water softener embodying the present invention. Reference numeral 1 is a resin cylinder, and a control valve 2 having a switching control means is mounted on the resin cylinder 1. Reference numeral 3 is a salt water tank, and the salt water tank 3 and the resin cylinder 1 are connected by a salt water line 4 via the control valve 2. A water collecting pipe 5 is inserted through the center of the resin cylinder 1, and the water collecting pipe 5 is connected to the control valve 2. A raw water line 6 for supplying raw water, a soft water line 7 for supplying soft water, and a drain line 8 are connected to the control valve 2, respectively.

FIG. 2 is an explanatory view showing the resin cylinder 1 in an enlarged manner. A predetermined amount of silica stone 9 is accommodated in the lower portion of the resin cylinder 1 and is installed above the silica stone 9. Wire mesh 10
A predetermined amount of the ion exchange resin 11 is housed between and.
In order to prevent the wire mesh 10 from being clogged, particles 12 (for example, PVC pellets in the form of rice grains) that are larger than the mesh of the wire mesh 10 and lighter than the ion exchange resin 11 are charged in the resin mesh 1 inside the resin cylinder 1. A predetermined amount is stored in the lower part.

Next, a method of controlling the water softener having the above structure will be described. In the water passing step, the raw water from the raw water line 6 is operated into the water collecting pipe 5 by operating the control valve 2, and the water flows from the lower part of the water collecting pipe 5 in the resin cylinder 1 as an upward flow. In, the hard water is softened by the action of the ion exchange resin 11 and is supplied to each device through the soft water line 7. It should be noted that the ion exchange resin 1 is produced by the upward flow of the raw water.
Although 1 floats, the outflow of the ion exchange resin 11 is prevented by the wire net 10 and the particles 12 installed in the upper part of the resin cylinder 1. When the supply of raw water is stopped, the ion exchange resin 11 settles and the resin layer is loosened, so that the conventional backwashing process is unnecessary. In the regeneration step, the control valve 2 is switched to cause the salt water in the salt water tank 3 to flow in as a downward flow from the upper portion of the resin cylinder 1 through the salt water line 4 to regenerate the salt water of the ion exchange resin 11.
The water is discharged from the drainage line 8 to the outside of the system through the water collection pipe 5. In the next water washing step, the control valve 2 is switched again to feed the raw water from the raw water line 6 to the resin cylinder 1
The salt water used in the salt water regeneration is washed from above and discharged from the drainage line 8 to the outside of the system via the water collecting pipe 5. In the next water replenishment step, the control valve 2 is switched again to supply a predetermined amount of raw water from the raw water line 6 into the salt water tank 3 through the salt water line 4.

[0009]

As described above, according to the present invention, the method of controlling the water softener is the 4-cycle control of the water-passing step, the regeneration step, the water-washing step, and the rehydration step. This is simpler than the 5-cycle control of the washing process, the regeneration process, the water washing process, and the water refilling process, and the structure of the control valve can be simplified, so that the production cost and the failure rate can be reduced.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view showing a configuration of a water softener embodying the present invention.

FIG. 2 is an explanatory view showing a water flow state in a water flow step in which the resin cylinder of FIG. 1 is enlarged.

FIG. 3 is a schematic explanatory view showing a configuration of a conventional water softener.

[Explanation of symbols]

 1 Resin Cylinder 2 Control Valve 3 Salt Water Tank 4 Salt Water Line 5 Water Collection Pipe 6 Raw Water Line 7 Soft Water Line 8 Drain Line 11 Ion Exchange Resin

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takeshi Yoneda 7 Horie-cho, Matsuyama-shi, Ehime Prefecture Miura Kogyo Co., Ltd. (72) Inventor Kimishi Ueda 7 Horie-cho, Matsuyama-shi, Ehime Pref. Miura Kogyo Co., Ltd. (72 ) Inventor Shigeto Obara 7 Horie-cho, Matsuyama-shi, Ehime Miura Industrial Co., Ltd.

Claims (1)

[Claims] 1. A resin cylinder 1 filled with an ion exchange resin 11.
, A salt water tank 3 for regenerating the ion exchange resin, and a control valve 2 which is inserted through the center of the resin cylinder 1.
, A salt water line 4 connecting the control valve 2 and the salt water tank 3, a raw water line 6 connected to the control valve 2, and a soft water line 7.
In the water softener having a structure for switching each line of the drain line 8 and the drain line 8, the control valve 2
By operating the raw water from the raw water line 6 as an upward flow from the lower part of the water collecting pipe 5, and the salt water in the salt water tank 3 as a downward flow from the upper part of the resin cylinder 1. A step of regenerating the ion-exchange resin that flows, a step of washing the raw water from the raw water line 6 as a downward flow from the upper part of the resin cylinder 1, and a step of supplying the raw water from the raw water line 6 to the salt water tank 3. The method for controlling a water softener is characterized in that the water replenishing process is controlled by 4 cycles.