JPH06477A - Water purifying apparatus - Google Patents

Abstract

PURPOSE:To extend the life of a filter member by preventing the collapse of a hollow yarn membrane in such a case that the filter member is the hollow yarn membrane, to extremely enhance convenience from the aspect of use and to obtain water-hammering preventing effect at the time of the stop of water by providing a constant flow rate valve to the water inflow part on a primary side. CONSTITUTION:A valve disc 90 composed of an elastomer is arranged in the upper part of the joint 9 of a water purifier A and consists of an upper check valve part 91 and a lower constant flow rate valve part 92 having a slit. The constant flow rate valve part 92 throttles the passage between the valve part 92 and the inner peripheral part of the joint 9 when the valve disc is pushed and bent by water pressure and, since the passage is more throttled as water pressure becomes high, a water passing amount becomes almost constant regardless of water pressure. Even when water pressure is high and the inflow of water is started at a stroke, the inflow amount of water is limited by the constant flow rate valve part 92 and, therefore, the external pressure acting on a hollow yarn membrane 46 being a filter member can be kept low.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a domestic water purifying apparatus for filtering drinking water.

[0002]

2. Description of the Related Art There are various types of water purifiers, such as those attached to a faucet and those which are connected to a branch pipe from a water pipe to discharge purified water to a dedicated faucet. Further, in recent years, a large number of filter members using not only activated carbon but also hollow fiber membranes made of polyethylene or polysulfone have been provided.

[0003]

By the way, the hollow fiber membrane is
When the flow velocity of passing water is high and the pressure difference between the inside and outside of the hollow fiber membrane is large, there is a problem that the membrane is likely to be crushed. The crushing of the membrane causes a so-called clogging and causes a decrease in the amount of purified water. In particular, when impurities in tap water are trapped and accumulated by fine pores of 0.01 to 0.1 μm on the wall surface of the hollow fiber membrane and the pressure difference between the inside and outside of the hollow fiber membrane is easily generated, tap water If the air flow is made to open at once, the film is likely to collapse.

Among the types connected to a branch pipe from a water pipe, there is a type in which a solenoid valve which is opened and closed by a switch provided on a dedicated faucet side is provided in a water purifier. However, there is a great possibility that the above-mentioned film collapse may occur. The present invention has been made in view of the above points, and an object of the present invention is to provide a water purifying apparatus that can prevent a filter member from being damaged by water pressure.

[0005]

SUMMARY OF THE INVENTION The present invention, however, is characterized in that a constant flow valve is provided at the inlet of water on the primary side.

[0006]

According to the present invention, even if the water pressure is high and the inflow of water starts at once, the amount of inflow is limited by the constant flow valve, so that the external pressure acting on the filter member can be kept small. And when the filtration member is a hollow fiber membrane,
It is possible to prevent film collapse.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the illustrated embodiments. As shown in FIG. 3, this water purifier introduces tap water by branching a tap water pipe leading to an existing mixed tap D. Water purifier A that does and cabinet 1 with water filtered by water purifier A
00, the water purifier A is installed in the cabinet 100, and the water faucet B is attached to the sink top plate with a hole.

The water purifier A comprises a cylindrical lower opening type body case 1 made of synthetic resin, a case lid 10 screwed to the bottom of the body case 1, a cartridge 4 housed in the body case 1, a body case. 1 and a cover 3 fastened with a screw, and is installed in the cabinet 100 by an installation table 5 or a receiving member 6. Installation stand 5
Is to hold the water purifier A in an upright state by fitting the lower portion of the water purifier A with a fitting portion on the upper surface thereof, and the receiving member 6 is fixed to the wall surface in the cabinet 100 and the water purifier is fixed. The water purifier A is held by hooking A. Figure 7
Shows an example of the receiving member 6, and a pair of support arms 60 for receiving the lower surface of the flange at the upper end of the main body case 1,
60 and an engagement piece 61 that engages with the engagement groove 33 shown in FIG. 2 provided in the cover 3.

A valve is opened in the cover 3 of the water purifier A,
A solenoid valve 8 of a DC driving latching type, which requires energization only at the moment when the valve is closed, is provided. The inflow port 80 of the solenoid valve 8 projects upward from the upper surface of the cover 3 and has a joint 9 attached thereto. The joint 9 attached by being screwed into a male screw formed on the outer surface of the inflow port 80 sandwiches the packing 88 with the upper end surface of the inflow port 80. Rotation limiting stepped portion 96 for limiting the range
In addition, since the crushing margin for sealing the packing 88 is limited, the packing 88 is prevented from being damaged by the excessive closing of the joint 9. Also joint 9
Is also provided with a cylindrical rib 97 which is located on the inner peripheral side of the packing 88 and prevents the packing 88 from protruding to the inner side, and prevents the sealing effect from being lowered due to the displacement of the packing 88. It is possible to obtain a stable sealing effect without being affected by the magnitude of the tightening torque of the joint 9 at the time of construction.

A valve element 90 made of an elastic material is disposed in the upper portion of the joint 9. The valve body 90 has a check valve portion 91 on the upper side and a constant flow rate valve portion 92 having a slit on the lower side. The constant flow rate valve section 92 narrows the flow path between the inner circumferential surface of the joint 9 and the flow path when it is bent by being pressed by water pressure. , The amount of water flow is almost constant. Reference numeral 93 in the drawing denotes an opening lid which holds the valve body 90 and serves as a valve seat of the check valve portion 91.

The outlet 81 of the solenoid valve 8 is an O-ring 8
2 is fitted to the water guiding tube portion 13 of the main body case 1. A primary joint 14 is fixed in the water guiding cylinder 13 by means such as ultrasonic welding, and the lower end of the primary joint 14 has an inlet 43 in the cartridge 4.
Connected to. A secondary joint 15 is fixed to the center of the upper surface of the body case 1. This secondary joint 15
2, connects the outflow port 44 in the cartridge 4 and the discharge port 35 provided in the cover 3 to each other. A discharge port 35, which is connected to a dedicated faucet B described later through a flexible pipe or a hose, has a ball 36 for preventing backflow therein.

The outer surface of the cover 3 is provided with a battery housing portion 36 for housing a battery V serving as a power source of the solenoid valve 8 and is covered with a battery lid 37. In the figure, 38 is a hook portion of the battery lid 37, and 39 is a board on which a control circuit is mounted. The cartridge 4 to be mounted in the main body case 1 has a cylindrical case 40 whose bottom opening is closed by a bottom lid 41.
A holder 45 accommodating a hollow fiber membrane 46 is arranged, and activated carbon 47 is filled between the outer surface of the holder 45 and the inner surface of the case 40. Water entering from the inflow port 43 flows into the filling space of the activated carbon 47. After that, it reaches the outflow port 44 from the bottom surface side of the holder 45 through the filling space of the hollow fiber membrane 46. Reference numeral 48 in the figure is a net for preventing leakage of the activated carbon 47. The cartridge 4 can be replaced by removing the case lid 10 from the main body case 1. When the cartridge 4 is removed for replacement, the backflow preventing balls 36 do not wet the inside of the cabinet 100 in order to prevent backflow from the dedicated faucet B.

Here, the storage space of the cartridge 4 in the main body case 1 has a certain degree of clearance with respect to the size of the cartridge 4, but this clearance has a water pressure due to clogging of the cartridge 4. The size is set to allow only expansion within the tensile strength according to the material of the cartridge 4 against expansion when applied to the inside. For this reason, even when an abnormally high water pressure is applied to the inside of the cartridge 4, the main body case 1 serves as a hoop, so that the cartridge 4 is not destroyed.

On the other hand, as shown in FIGS. 5 and 6, the dedicated faucet B has a cylindrical body 2 fixed to a sink top plate and a ring 20 rotatably attached to the outer peripheral surface of the body 2.
A pipe holder 21 attached to the upper surface of the body 2, a pipe 22 passing through the inside of the body 2 and having a lower end connected to the outlet 35 of the water purifier A, and a water discharge pipe 23 attached to the ring 20. Water flowing in from 22 is discharged from the water discharge pipe 23 through the ring-shaped space between the body 2 and the ring 20. In the figure, 24 is a washer, 25 is a packing, 26 is a mounting nut, and 27 is a seal ring. And on the upper surface side of the ring retainer 21,
A switch case 28 having a switch 2a composed of a tact switch and indicator lights 2b and 2c composed of light emitting diodes.
Is provided. Reference numeral 29 is an operation name plate made of a polyester film or the like. The electric components in the switch case 28 are connected to the water purifier A via a connection cord C with a connector.

Now, when the switch 2a of the special faucet B is pushed once via the operation name plate 29, the solenoid valve 8 on the side of the water purifier A is opened and the indicator light 2b of the special faucet B is turned on. The water flowing into the water purifier A is supplied to the check valve portion 9 of the valve body 90.
After passing through 1 and the constant flow valve section 92, it enters into the cartridge 4 through the solenoid valve 8, the residual chlorine and the odorous components are removed by the activated carbon 47, and then it is finely filtered by the hollow fiber membrane 46, and then discharged. It flows from the outlet 35 to the dedicated faucet B and is discharged from the water discharge pipe 23.

At this time, the constant flow valve portion 92 of the valve body 90
Since the flow velocity of water when passing through the hollow fiber membrane 46 is substantially constant due to the existence of the above, the hollow fiber membrane 46 is hardly crushed even if the water pressure on the primary side is high. In addition,
The check valve portion 91 of the valve body 90 prevents the accumulated water in the cartridge 4 from flowing backward toward the water pipe when the water is cut off.

When the switch 2a of the water faucet B is operated again, the solenoid valve 8 is closed and the indicator lamp 2b is also turned off. Further, the control circuit mounted on the substrate 39 has a timer section, and when the switch 2a is not operated even after a lapse of a predetermined time, for example, 10 minutes from the start of water flow, a signal for closing the solenoid valve 8 is issued to automatically. It has a water-saving function to stop water. Further, in order to prevent the propagation of various bacteria in the accumulated water in the entire water purifier, when the water is not stopped and the purified water is not discharged for 24 hours, it also has a function of passing water for, for example, 20 seconds. In addition, the latter function is the cover 3 of the water purifier A.
It can be turned on and off by the slide switch S above. This makes it possible to activate this function only when the user is absent for a long period of time, and if this function is activated at all times, the purified water is suddenly discharged during the work in the sink depending on the timing. This may lead to such a situation. It is preferable that when the slide switch S is switched from the off state to the on state, water is automatically passed for the fixed time. Further, the control circuit here makes the indicator lamp 2c blink in order to prompt the replacement of the cartridge 4 when the accumulated time of the purified water discharge exceeds a preset time. The reset switch RS provided in the water purifier A is for resetting the integrated time when the cartridge 4 is replaced.

[0018]

As described above, according to the present invention, a constant flow valve is provided in the water inlet of the primary side to limit the inflow amount even if the water pressure is high and the water inflow begins at once. Therefore, the external pressure acting on the filter member can be kept small, and when the filter member is a hollow fiber membrane, the collapse of the membrane can be prevented and the life of the filter member can be extended. Also, since it does not cause an excessive flow rate, it is very convenient in use and also has a water hammer prevention effect when water is stopped.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an embodiment.

FIG. 2 is a transverse sectional view of the above.

FIG. 3 is a perspective view showing a usage state of the above.

FIG. 4 is a perspective view of the above.

FIG. 5 is a vertical cross-sectional view of the above-mentioned exclusive water faucet.

FIG. 6 is a plan view of the above-mentioned dedicated faucet.

FIG. 7 is a perspective view of the receiving bracket of the above.

[Explanation of symbols]

 A Water purifier 90 Valve body 92 Constant flow valve

Claims (4)

[Claims] 1. A water purifier comprising a constant flow valve in a primary side water inflow section. 2. A water inlet on the primary side is formed by a joint connected to the inlet of the solenoid valve by a screw connection, and the joint includes a rotation limiting portion for the screw of the inlet of the solenoid valve, 2. A rib located on the inner peripheral side of the packing arranged between the inlet and the inlet.
The described water purification device. 3. A control circuit is provided, which monitors the duration of the water-stop state and temporarily opens the solenoid valve to bring the solenoid into a water-passing state when the duration exceeds a predetermined time. The water purifier according to claim 1. 4. The water purifier according to claim 1, wherein the constant flow valve is formed integrally with the check valve.