JPH0721276Y2 - Drain discharge line of water softener - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a drain discharge line attached to a resin tube of a water softener.

[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. This type of water softener consists of 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) backwash, (2) salt water regeneration, ( Five cycles of 3) washing with water, (4) rapid washing with water, and (5) passing soft water are carried out by automatic regeneration operation.

By the way, the control valve 6 is
As shown in FIGS. 2 to 5, it is mounted on the upper portion of the resin cylinder 2 and has a body 6a, a cylinder 6b, and a piston 6
c and the ejector 6d shown in the sectional view of FIG. 2A. Inside the body 6a is a cylinder 6b.
And a flow path 6e is formed, and a raw water inlet 9, a soft water outlet 10, a salt water inlet 11 and a drain outlet 6f are formed on the outer surface. The raw water inlet 9 and the soft water outlet 10 are communicated with the cylinder 6b, and a piston 6c for opening and closing the inlet and outlet is inserted. The piston 6c has three piston rings 6 for performing the automatic regeneration operation.
c ', 6c'',6c''' are inserted at predetermined positions, and the piston rings 6c ', 6c'',6c''' are provided on the outer periphery thereof as shown in FIG. 2B. An O-ring 12 made of synthetic resin for sliding contact with the cylinder 6b is fitted.

Next, the 5-cycle automatic regeneration operation will be described by operating the control valve 6. When the softener passes a predetermined amount of soft water, the soft water outlet 10 is closed by a valve (not shown), and the backwash cycle (1) is started. This backwash cycle is performed by the piston 6c as shown in FIG.
Is drawn out most, and the raw water communicates with the cylinder outlet 6b 'and the ejector 6d as shown by the arrow, and through the distributor 5a provided at the lower end of the water collecting pipe 5 connected to the cylinder outlet 6b'. Are diffused and flow upward in the resin layer to expand and wash the resin, and the resin is discharged from the drain 6 from the cylinder inlet 6b ″.

Next, the salt water regeneration cycle (2) is shown in FIG.
The position of each piston ring is shown in Fig.
Is performed in a slightly pushed state. The raw water flows only to the ejector 6d, and salt water is sucked by the ejector 6d through the salt water supply line 13 from a salt water tank (not shown) so that the resin cylinder 2
Flows in. This salt water flows downward in the resin layer as shown by the arrow to regenerate the resin 4, and the distributor 5
The water is discharged from the drain discharge line 7 through the water collecting pipe 5 into the cylinder 6b through the flow path 6e, the flow rate adjusting portion 7a (orifice) provided in the drain discharge line 7, and the drain discharge line 7.

The washing cycle of (3) is configured to supply a predetermined amount of salt water from the salt water tank and stop the supply of salt water when the regeneration of the resin is completed. Therefore, thereafter, only the raw water flows into the resin cylinder 2 from the ejector 6d to wash the resin with water and discharge the salt. The discharge of raw water in this water washing cycle is the same as in the salt water regeneration cycle in (2) above, and therefore its explanation is omitted.

The rapid water washing cycle (4) is carried out in a state of being pushed further into the salt water regeneration cycle, as shown in the positions of the piston rings in FIG. Raw water flows into the cylinder outlet 6b ″ and the ejector portion 6d. Further, since the cylinder outlet 6b ″ communicates with the upper portion of the resin cylinder 2, a larger amount of water than in the water washing cycle flows downward in the resin cylinder 2 to wash the resin. The washed water is discharged from the drain discharge line 7 through the water collecting pipe 5 via the distributor 5a. On the other hand, the raw water flowing to the ejector 6d passes through the salt water line 13 to supply a predetermined amount to a salt water tank (not shown) to become salt water.

In the soft water flow cycle (5), the pistons 6c are all pushed in, as shown in the positions of the piston rings in FIG. That is, since the raw water flows into the cylinder outlet 6b ″ and the ejector 6d and immediately flows into the resin cylinder 2, there is almost no differential pressure between the inlet and the outlet of the ejector 6d, and salt water is not sucked. Therefore, the raw water flows downward in the resin layer 4 and the hardness component in the water is removed. The treated water passes through the distributor 5a, the water collecting pipe 5, and is supplied from the cylinder inlet 6b 'to the cooling / heating equipment through the soft water outlet 10 as shown by the arrow.

By the way, the piston rings 6c ',
Since the O-ring 12 made of synthetic resin attached to the outer peripheral portions of 6c ″ and 6c ′ ″ is used for a long period of time, a part thereof may be lost. When the O-ring 12 is lost, various problems occur in each cycle. In particular, in the salt water regeneration cycle (2), the raw water tries to bypass the defective portion and flow out to the drain discharge line 7. The raw water is suppressed by the attached flow rate adjusting portion 7a (orifice), the raw water flows into the resin cylinder 2, and the pressure at the outlet of the ejector 6d rises, so that the salt water does not flow into the resin cylinder 2 and flows back to the salt water line 13. This causes a problem.

[0010]

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a flow path control mechanism for a water softener that enables a salt water regeneration cycle even if the O-ring of the piston ring is lost. It is what

[0011]

Means for Solving the Problems That is, this invention is a control valve attached to a resin cylinder filled with an ion exchange resin, in which a drain flow rate adjusting portion is inserted on the connection side of a drain discharge line connected to this control valve. A bypass line for bypassing the drain flow rate control unit to discharge the drain is provided, and a solenoid valve that operates to open during a salt water regeneration cycle and a water washing cycle is inserted into the bypass line. Is characterized in that a pressure sensor is inserted in the drain discharge line and the electromagnetic valve is opened and closed by a signal of the pressure sensor.

[0012]

According to the present invention, during the salt water regeneration cycle and the water washing cycle, the bypass line solenoid valve provided in the drain discharge line is opened to discharge the raw water flowing out of the O-ring missing portion of the piston ring through the bypass line. Therefore, the pressure at the outlet of the ejector does not rise, and salt water can flow into the resin cylinder. Further, even during the water washing cycle, the raw water does not flow to the salt water line side and can flow into the resin cylinder to perform the water washing cycle.

[0013]

Embodiments of the present invention will be described in detail below with reference to the drawings. It is to be noted that the reference numerals of the conventional explanatory view and the explanatory view of the embodiment are given the same numbers for convenience. FIG. 1 is a cross-sectional explanatory view of the resin cylinder 2 and the control valve 6 of the water softener 1, and a salt water tank provided in parallel with the water softener 1 is not shown.
The resin tube 2 is a cylindrical container made of synthetic resin, and is provided with a plurality of support bases 2a on the outer side, and a control valve 6 is mounted on the upper part. A predetermined amount of silica stone 3 is laid in the lower portion of the resin cylinder 2, and a predetermined amount of ion exchange resin 4 is laid on the silica stone 3. Also, the above-mentioned silica stone 3
A water collecting pipe 5 equipped with a distributor 5a is erected at the center of the laying, and the tip end is the cylinder inlet 6
It communicates with b '.

The control valve 6 includes a body 6a,
It is composed of a cylinder 6b, a piston 6c, an ejector 6d, and a controller 14, and has a cylinder 6b and a flow path 6 inside.
e is formed, and the cylinder 6b has a piston 6c.
Has been inserted. A raw water inlet 9, a soft water outlet 10, a salt water inlet 11 and a drain outlet 6f are formed on the outside of the body 6a, and communicate with the cylinder 6b. A piston 6c for opening and closing the raw water inlet 9 and the soft water inlet 10 and the flow path 6e is inserted into the cylinder 6b, and three piston rings 6c'6c "6c" are provided at predetermined positions of the piston 6c. 'Is inserted. This piston ring 6c'6c''6c '''has an O-ring 12 on the outer peripheral portion of each piston ring as shown in the detailed view in FIG. 1B.
Is fitted.

The drain discharge line 7 according to the present invention is shown in FIG.
As shown in FIG. 5, a drain discharge line 7 is connected to the drain outlet 6f of the body 6a, and a drain flow rate adjusting section 7a (orifice) is inserted in the vicinity of the drain outlet 6f of the drain discharge line 7. Bypass line 7b for bypassing 7a is provided.
The solenoid valve 8 is inserted at a predetermined position of b. Reference numeral 14 in the figure denotes a control unit which opens and closes the solenoid valve 8 via the communication line 15 and controls the automatic regeneration operation via the control valve 6. 1 is an enlarged sectional view of the ejector 6d, and 13 is a salt water line connected to a salt water tank (not shown). As shown by the dotted line in FIG. 1, a pressure sensor 16 is installed in the drain discharge line 7.
The electromagnetic valve 8 can be opened and closed via the control unit 14 by inserting a signal from the pressure sensor 16.

Next, the operation of the water softener 1 embodying the present invention will be described. As described in detail in the above-mentioned conventional technique, the automatic regenerating operation of the water softener 1 includes: (1) backwashing (2) salt water regeneration (3) water washing (4) rapid water washing (5) soft water 5 cycles Comprising the pressure sensor of the drain discharge line 7 of this invention
Since the 16 and the bypass line 7b are applied to the salt water regeneration of (2) and the water washing cycle of (3), these two cycles will be described, and the other cycles are the same as those in the conventional art, and thus the description thereof will be omitted. That is, since the control unit 14 opens the solenoid valve 8 through the communication line 15 during the salt water regeneration and washing cycle, the raw water flowing out from the defective portion of the O ring 12 of each piston ring can be discharged through the bypass line 7b. Therefore, the pressure at the outlet of the ejector 6d does not rise, and salt water can flow into the resin cylinder 2. Also during the water washing cycle, the raw water does not flow to the salt water supply line 13 side and flows into the resin cylinder 2 to complete the water washing cycle, and after the completion, the solenoid valve 8 is closed. In the embodiment in which the pressure sensor 16 is inserted, when the O-ring of the piston ring is broken and raw water flows into the drain discharge line 7 and rises to a predetermined pressure, the pressure sensor 16 operates to control the signal. Notify department 14 and open solenoid valve 8. Subsequent operations are the same as those described above and will not be described.

[0017]

As described above, according to the present invention, the pressure sensor and the bypass line are provided in the drain discharge line, and the O-ring of the piston ring is lost during the salt water regeneration and washing cycle when the solenoid valve inserted in the bypass line is used. The raw water flows into the drain discharge line and opens when it reaches the specified pressure. Therefore, even if the O-ring of the piston ring is lost, the water softener can be automatically regenerated, and the cooling and heating equipment to be supplied will not be disturbed. There is also no significant effect on maintenance.

[Brief description of drawings]

FIG. 1 is an explanatory view of a salt water regeneration cycle in which a resin cylinder and a control valve of a water softener embodying the present invention are cross-sectioned.

FIG. 2 is an explanatory view of a backwash cycle in which a resin cylinder and a control valve of a conventional water softener are sectioned.

FIG. 3 is an explanatory diagram of a salt water regeneration and water washing cycle of FIG.

4 is an explanatory view of the rapid water washing cycle of FIG.

FIG. 5 is an explanatory view of the soft water flow cycle of FIG. 2.

[Explanation of symbols]

 1. Water softener 2. Resin cylinder 4. Ion exchange resin 6. Control valve 7. Drain discharge line 7a. Drain flow rate controller (orifice) 7b. Bypass line 8. Solenoid valve 16. Pressure sensor

Claims (2)

[Scope of utility model registration request] 1. In a control valve 6 attached to a resin cylinder 2 filled with an ion exchange resin 4, a drain flow rate adjusting portion 7a is inserted at the connection side of a drain discharge line 7 connected to this control valve 6, Bypass line 7 for bypassing the flow rate control unit 7a and discharging the drain
b is provided, and the bypass line 7b is provided with a solenoid valve 8 that operates to open during the salt water regeneration cycle and the water washing cycle,
Drain discharge line of water softener characterized by being inserted. 2. The drain discharge line 7 according to claim 1, wherein a pressure sensor 16 is inserted on the connection side of the control valve 6, and the electromagnetic valve 8 is opened / closed by a signal of the pressure sensor 16. The drain discharge line of the water softener according to claim 1.