JP3098765B2 - Water purifier - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial applications]

The present invention relates to a water purifier having a backwash function, and more particularly to a stationary water purifier in which a switching unit and a purifying unit are separated by a pipe.

[Prior art]

In a stationary water purifier in which a purifying unit is connected via pipe means to a switching unit attached to the tip of the faucet to switch the water channel, backwashing of the purifying member in the purifying unit is performed by using water supplied from the faucet. What is performed using pressure is provided. In this apparatus, the operation of supplying and stopping water to the purification unit is performed by a switching unit attached to a faucet, and the operation of switching between discharge and backwashing of purified water is performed on the purification unit side.

[Problems to be solved by the invention]

In this case, when performing backwashing, the supply of water to the purification unit must be selected by operation on the switching unit side, and further switching to backwashing must be performed on the purification unit side, and the operation is complicated. The present invention has been made in view of such a point, and an object of the present invention is to provide a water purifier capable of switching between discharge and backwash of purified water only by operating a switching unit.

[Means for Solving the Problems]

Thus, the present invention comprises a switching unit for switching the flow of water, a purifying unit provided with a filtering unit for purifying water supplied from the switching unit, and a pipe means for connecting both units. A purified water reservoir that stores purified water is provided between the filtration unit and a purified water outlet that releases purified purified water, and the purified water stored in the purified water reservoir is provided from the switching unit by providing the purified water reservoir as a room. In a water purifier provided with a backwashing cylinder which is fed back to the filtration unit side by the pressure of the supplied water, the pipe means has two waterways of a water purification path and a backwashing path, and the switching unit is reverse to the water purification path. The purification unit is provided with a switching member for selectively supplying water to the washing channel, the purification unit is provided with a check valve at a connection portion between the filtration portion and the water purification channel, and a drainage portion for discharging water in the filtration portion is provided with a water purification channel. Open according to the water pressure The purifying unit further includes a check valve at a connection between the backwash cylinder and the backwash path, and a discharge valve for discharging water flowing into the backwash cylinder through the check valve. It is characterized by having a valve that opens and closes the drainage section according to the water pressure in the backwashing path. According to the present invention, when the switching unit switches to the water purification channel side, the drainage unit of the filtration unit is closed to purify water, and when the switching unit is switched to the backwashing channel side, the drainage unit of the backwash cylinder is closed. In this case, no backflow occurs through another water channel due to the presence of the check valve. [Embodiment] Hereinafter, the present invention will be described in detail with reference to the illustrated embodiment. This water purifier is attached to a faucet and has a switching unit B for switching the flow of water, and a purifying unit which detachably houses a purifying cartridge 10. From the switching unit B, it is attached to the faucet 9 by a mounting nut 51 which engages with a mounting aid 54 used in accordance with the tip shape of the faucet 9 and is screwed to the main body housing 5. The switching unit B is provided with a rotary switching valve 7 inside.
, And a shower cap 52 is attached to the lower end thereof. In the figure, reference numeral 55 denotes a water-stop packing which comes into contact with the tip of the faucet 9 and also comes into contact with the outer peripheral surface of the switching valve 7 described later. This shower cap 52 has a foam unit 58 at the center.
Is equipped with a water outlet 56 equipped with a number of small holes 57 around the periphery for shower-like watering.
The water outlet 56 of 52 and the lower end opening of the valve chamber 50 are cylindrical partitions 59.
Through. The valve chamber 50 having a circular section has an upper opening communicating with the faucet 9, a lower opening connecting to the water outlet 56, an opening connecting to the outer peripheral space of the partition 59, and a pair of concentrically formed side surfaces of the main body housing 5. With connection ports 61 and 62 of
The switching valve 7 housed therein has a plurality of communication holes for selectively communicating an upper opening in the valve chamber 50 with another opening. Here, only a communication hole 71 for communicating the upper opening of the valve chamber with the connection port 61 and a communication hole 72 for communicating the upper opening with the connection port 62 are shown, and other communication holes are not shown. . The hose 3 formed as a double pipe is connected to the connection ports 61 and 62. That is,
The outer water purification passage 31 is connected to the connection port 61, and the inner backwash path 32 is connected to the connection port 62. In the drawing, reference numeral 60 denotes a holding frame for holding the switching valve 7, reference numeral 53 denotes a lever attached to one end of the switching valve 7, and reference numeral 63 engages with a click hole formed on the outer peripheral surface of the switching valve 7 by being biased by a spring 64. Further, the ball gives clicks at a plurality of positions for the rotation of the switching valve 7. Reference numeral 65 denotes a ball which closes an emergency drain port formed in a flow path connecting the faucet 9 and the purification unit B in a state where the emergency drain port is biased by a spring 66, and the water pressure in the purified water discharge becomes abnormally high. Sometimes escape the water. One end of each of the springs 64, 66 is received by the partition 59. On the other hand, the purification unit A is a case 1,
The case 1 includes a purifying cartridge 10 detachably housed in the case 1, a flow path switching block 2, and the like.
The lower case 11 includes a lower case 11 whose bottom opening is closed by a bottom lid 34, and a cap 12 that covers the purification cartridge 10 mounted on the lower case 11 and is connected to the lower case 11. It should be noted that the purification cartridge 10 as a filtration unit
Has a built-in filter medium made of activated carbon or a hollow fiber membrane. In the figure, reference numeral 35 denotes a suction cup. The lower case 11 has a cylinder portion 13 having upper and lower surfaces opened and a lower surface opening closed by a lid 14, and the purification cartridge 10 is screwed to the upper end of the cylinder portion 13. ing. The cylinder portion 13 of the lower case 11 has a purified water discharge port 16 to which a nozzle 17 is connected on the side surface at the center in the vertical direction, and the piston 3 is disposed inside the piston portion so as to be vertically movable. Piston 3 with packing mounted on the outer peripheral surface,
It constitutes a backwashing cylinder together with the cylinder portion 13, and opens and closes the purified water discharge port 16 as the cylinder moves up and down. The flow path switching block 2 is disposed on the lower surface of the cylinder portion 13, that is, on the lower surface of the lid 14. Channel switching block 2
Is provided with a connecting portion 21 to which the hose 3, which is a double pipe, is connected at the center thereof, and a purifying front chamber 22 and a drainage portion 24 arranged on one side of the connecting portion 21; A diaphragm valve 23 for separating the chamber 22 and the drainage section 24 is provided. Further, the other side of the connection section 21 separates the backwashing front chamber 25 and the drainage section 27, and the backwashing front chamber 25 and the drainage section 27. The water passing through the water purification passage 31 of the hose 3 is provided with a diaphragm valve 26 and the purification chamber.
On the side 22, water passing through the backwash channel 32 enters the backwash front chamber 25. The purifying front chamber 22 communicates with a space above the lower case 11 and covered by the cap 12 through a vertical passage 15 and a check valve 28 formed integrally with the lower case 11. The backwashing front chamber 25 communicates with the lower space β of the piston 13 in the cylinder portion 13 through the check valve 29. The drainage portion 24 of the flow path switching block 2 has one end communicating with a space above the lower case 11 and covered by the cap 12, and a drainage hose 36 connected to the other end. One end communicates with a space β below the piston 3 of the cylinder portion 13, and the drain hose 36 is connected to the other end. As shown in FIG. 2, the switching unit B connects the upper opening communicating with the faucet 9 of the valve chamber 50 to the connection port 61 through the communication hole 71 of the switching valve 7, and the water purification passage of the hose 3. When the raw water is sent to the purification unit A side through 31, this raw water
As shown in FIG. 3, the exhaust portion 24 is closed by entering the precleaning chamber 22 and pressing the diaphragm valve 23, and reaches the space inside the cap 12 via the passage 15 and the check valve 28, thereby purifying the space. After entering the purification cartridge 10 from the lower peripheral portion of the cartridge 10 and being purified, the purified water reservoir α, which is the space above the piston 3 in the cylinder portion 13, enters from the center of the lower surface of the purification cartridge 10 and pushes down the piston 3. Then, the water flows out to the outside through the open purified water discharge port 16 and the nozzle 17. At this time, since the check valve 29 is closed, the water in the space β below the piston 3 in the cylinder portion 13 does not flow back to the hose 3 side, and the diaphragm valve 26
Is drained through the drainage part 27 because the drainage part 27 is opened by its own elasticity. By operating the lever 53 of the switching unit B,
When the switching valve 7 is rotated to allow the communication hole 72 of the switching valve 7 to communicate the upper opening of the valve chamber 50 and the connection port 62 as shown in FIG. The raw water supplied to the purifying unit A enters the backwashing pre-chamber 25 and presses the diaphragm valve 26 to close the drainage section 27, and at the same time, the check valve 29 in the space β below the piston 3 in the cylinder section 13. And pushes up the piston 3 as shown in FIG. 5 and FIG. For this reason, a part of the purified water stored in the purified water storage part α which is one chamber of the backwash cylinder and the space above the piston 3 is discharged from the purified water discharge port 16 at the initial stage of the rise of the piston 3. However, the piston 3 has a clean water outlet 16
From the point in time when the filter is closed, the water flows in the purification cartridge 10 in the reverse direction, the filter in the purification cartridge 10 is backwashed, and then discharged through the drainage unit 24 which is open. At this time, since the check valve 28 is closed, water does not flow back to the hose 3 through the pre-purification chamber 22. At this time, the communication hole 71 in the switching unit B
Since is open to the atmosphere, the opening of the drainage section 24 is not hindered. Then, the upper opening communicating with the faucet 9 of the valve chamber 50 in the switching unit B is closed by the switching valve 7 to set the water shut off state,
Or as a state where water is discharged from the water discharge port 56 and the small hole 57,
When the supply of the raw water to the purification unit A is stopped, the drainage portions 24 and 27 of the flow path switching unit 2 require that the communication holes 71 and 72 of the switching valve 7 of the switching unit B be open to the atmosphere. Since the diaphragm valves 23 and 26 return to their respective elastic states and open in their own elasticity, and the check valves 28 and 29 are both in the closed state, backflow to the switching unit B side occurs. There is no. The switching valve 7 of the switching unit B is formed such that the backwash position is located between the water stop position and the purified water discharge position.
For this reason, every time the user discharges purified water, backwashing is always performed.

【The invention's effect】

As described above, in the present invention, when the switching unit is switched to the water purification channel side, the drainage portion of the filtration unit is closed to purify the water, and when the switching unit is switched to the backwashing channel side, the drainage portion of the backwash cylinder is closed. Backwashing is performed, and despite the switching unit and the purifying unit being connected via pipe means, the discharge and backwashing of purified water can be performed only by operating the switching unit. It can be switched, and the presence of an open drainage section prevents water from accumulating inside the purification unit. No backflow occurs through other channels due to the presence of the valve.

[Brief description of the drawings]

FIG. 1 is a perspective view of one embodiment of the present invention, FIG. 2 is a longitudinal sectional view of a switching unit at the time of discharge of purified water, and FIG. Fig. 5 is a longitudinal sectional view of the switching unit at the time of backwashing, and Figs. 5 and 6 are longitudinal sectional views of the purification unit at the time of backwashing at the same time. FIG. 8 is a vertical sectional view of the purification unit when water is stopped, and FIG. 9 is a bottom view of the purification unit with the bottom cover removed, wherein A is a purification unit, and B is a switching unit. 3 is a hose, 10 is a purification cartridge (filtration unit), 13 is a cylinder part which is a component of a backwash cylinder, 23 and 26 are diaphragm valves, 28 and 29 are check valves, 31 is a water purification channel, 32 is Indicates a backwash road.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) C02F 1/44 B01D 65/02 C02F 1/28

Claims (1)

(57) [Claims] 1. A switching unit for switching a flow of water, a purifying unit provided with a filtering unit for purifying water supplied from the switching unit, and a pipe means for connecting the two units. A purified water reservoir that stores purified water is provided between the filtration unit and the purified water outlet that releases purified purified water, and a purified water reservoir is provided as a single room to supply purified water stored in the purified water reservoir from the switching unit. A water purifier provided with a backwash cylinder returned to the filtration unit side by the pressure of the supplied water, wherein the pipe means is provided with two water passages, a clean water passage and a backwash water passage, and the switching unit is provided with a backwash water passage and the backwash water. A switching member for selectively supplying water to the water purification passage; the purification unit includes a check valve at a connection between the filtration unit and the water purification passage; and a drainage unit for discharging water in the filtration unit. Open and close according to water pressure The purifying unit is further provided with a check valve at a connection portion between the backwash cylinder and the backwash channel, and for discharging water flowing into the backwash cylinder through the check valve. A water purifier comprising a valve that opens and closes a drain section according to a water pressure in a backwash channel.