JP2604048Y2 - Channel switching device for water treatment - Google Patents

Description

[Detailed description of the invention]

[0001]

In the present invention, raw water can be easily switched between a water treatment device side and a water discharge side, and when hot water flows out to the water treatment device side, it can be immediately returned to the faucet side. The present invention relates to a water treatment apparatus flow path switching device.

[0002]

2. Description of the Related Art Generally, in a water treatment device such as a water purifier, an alkaline ionized water generator, etc., raw water is branched off from a water tap to take in raw water. A filter made of a polymer thin film or the like loaded in the water treatment device is used. The diaphragm and the diaphragm are weak to heat, and when hot water is allowed to pass through, the performance is deteriorated, and a problem occurs in durability.

However, the recent faucet has made it possible to receive not only raw water but also hot water or a mixed water of hot water and raw water due to the spread of hot water supply equipment. There is a possibility that it will flow to the container side.

[0004] Therefore, for example, Japanese Utility Model Application Laid-open No. Sho 63-10779.
As disclosed in Japanese Patent Laid-Open Publication No. 6-106, a hot water switching valve is interposed in the middle of a water passage communicating from a faucet to the water treatment device side. The spring reaches the transformation temperature and expands, shuts off the water passage communicating with the water treatment device, and also bypasses and discharges the hot water to prevent flow of the hot water into the water treatment device. Various devices have been devised.

[0005]

However, the flow path switching device disclosed in the prior art has the following problems.

(1) Since the spout of raw water and the spout of treated water passing through the water treatment device are separate, the usability is poor.

(2) When the water treatment device is installed at a position relatively distant from the faucet, a position for directly taking out raw water and a position for taking out treated water (purified water or purified water) flowing from the water treatment device. It is easy to leave and it is inconvenient.

(3) A switching valve disposed on the faucet side, a temperature sensing valve interposed in the middle of a flow path communicating from the switching valve to the water treatment device side, and disposed downstream of the temperature sensing valve. Since the flow path with the treated water treatment unit is not unified, the connection is not only complicated, but the hose for connection is bulky and the handling property is poor.

Accordingly, an object of the present invention is to simplify the structure by unifying the connection and to facilitate the connection between the constituent parts, to be easy to use, excellent in versatility, and to make the whole compact. It is an object of the present invention to provide a water treatment apparatus flow path switching device that can perform the above-described steps.

[0010]

In order to achieve the above object, a water treatment apparatus flow switching device according to the present invention is mounted on a faucet in which raw water and hot water flow freely, and water from the faucet is supplied to the faucet.
Or, a discharge port for discharging water returned from the water treatment device side,
Outflow that supplies water to a water treatment device installed separately from the faucet
The water returned from the mouth and the water treatment unit is guided to the discharge port.
Inlet and water from the faucet to the outlet and outlet
A flow path switching換栓and a 3-way switching valve for selectively directing the
A supply-side inlet connected to the outlet of the channel switching tap,
A supply outlet for supplying water to the water treatment device;
A return inlet into which the water returned from the instrument flows,
A return outlet connected to the inlet of the flow switching tap,
For supply that connects the supply-side inlet with the supply outlet
The internal passage, the return inlet and the return outlet
Bypass flow path that bypasses the internal return passage that communicates
And that the water introduced from the supply inlet is hot water
The hot water flows through the bypass flow path to return the hot water.
A hot water switching valve for allowing the flow to flow out of the outlet.
A hot water switching valve unit configured separately from the stopper,
The outlet of the flow switching tap and the supply of the hot water switching valve unit
Supply-side inlet and return outflow of the hot water switching valve unit
The mouth and the inlet of the flow switching tap are connected by a parallel hose,
The supply outlet of the hot water switching valve unit and the water treatment
Inlet for scientific equipment, return port for the water treatment unit and the hot drain
The return inlet of the valve replacement unit is connected with a parallel hose.
It is characterized by having been done.

In a preferred embodiment, the bypass passage and the return internal passage of the hot water switching valve unit are provided.
In the portion located on the return inlet side from the connection with the
Allows inflow from the return inlet and prevents backflow
A check valve is provided .

[0012]

According to the channel switching device for a water treatment device of the present invention, the flow
Switch the three-way switching valve of the passage switching tap to the outlet side to the water treatment unit
If the water from the tap goes through the supply passage of the parallel hose
Flow into the hot water switching valve unit, and further into the hot water switching valve unit
Through another parallel hose feed passage from the water treatment unit
The water that has been introduced into the
Return to the hot water switching valve unit through the return passage of
Return the first parallel hose return path from the hot water switching valve unit.
Return to the inlet of the flow switching tap and flow out of the outlet
I do.

At this time, hot water is supplied to the water treatment device side.
When the hot water switching valve of the hot water switching valve unit is
Water flows into the bypass flow path and flows out from the return outlet.
Hot water will not be sent to the water treatment unit.
It is returned to the inlet of the flow path switching tap and is discharged from the discharge port.

Also, the three-way switching valve of the flow path switching tap is connected to the water outlet side.
If you switch to raw water, hot water, and
These mixed waters are discharged as they are.

As described above, the flow path switching for the water treatment device of the present invention.
The equipment consists of a flow switching valve attached to the faucet and a hot water switching valve unit.
And the water treatment unit are separately installed, and they are
Connected with a line hose, and the return channel is
The connection is unified and the structure is simplified.
Connection work between components
You. Also, since there is only one spout, it is convenient.

Further , the by-pass of the hot water switching valve unit is
Return from the connection between the path and the return internal passage
In the part located on the inlet side, the return inlet
When a check valve is provided to allow inflow and prevent backflow
Prevents hot water from flowing back into the water treatment equipment.
Wear.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 to 5 show an embodiment of a flow switching device for a water treatment device according to the present invention.

As shown in FIG. 1, the flow switching device for a water treatment device includes a flow switching tap 11 attached to a faucet 1 through which raw water and hot water can freely mix, and a water purifier or an alkaline ionized water generator. And the like, a parallel hose 41 connecting between the two, and a hot water switching valve unit 31A interposed in the middle of the parallel hose 41.

As shown in FIG. 2, the valve 11a of the three-way switching valve 12 is provided on the upstream side of the flow switching plug 11 and an outlet 13 is provided on the side. .
Further, a water outlet 14 is formed on the downstream side, and an inlet 15 is provided at a side portion of the outlet 15 at a predetermined interval from the outlet 13.

The valve body 12a of the three-way switching valve 12 has a spherical shape and is rotatably supported by seal members 16,16. The valve body 12a has a water discharge passage 12b that can communicate with the water discharge port 14 and the feed passage 1 that can communicate with the outflow port 13.
2c are formed.

The switching between the two flow paths 12b and 12c is performed by an operation lever 12d which is connected to the valve body 12a and projects to one side of the flow path switching plug 11.

Further, one side of the hot water switching valve unit 31A has an outlet 13 and an inlet 15
Supply passage 41a and return passage 41b of the parallel hose 41
A supply-side inflow port 31a and a return-side outflow port 31c that are connected to each other through the connection are provided. On the other hand, the supply outlet 31 is provided on the side opposite to the heat sensing valve unit 31A.
b and a return inlet 31d are provided, and the supply outlet 31b and the return inlet 31d are connected to the water treatment device 21.
Are connected to a supply port 41a and a return path 41b of the parallel hose 41, respectively.

Further, inside the hot water switching valve unit 31A, there is provided an internal supply passage 31e connecting the supply inlet 31a and the supply outlet 31b, and a return inlet 3e.
A return internal passage 31f is formed, which communicates 1d with the return outlet 31c.

Further, a hot water switching valve chamber 32 is interposed in the supply internal passage 31e.
Is connected to the return internal passage 31f via a bypass passage 31g. Also, this return internal passage 31f
Between the bypass passage 31g and the return inflow port 31d, a check valve 33 that prevents backflow of hot water flowing out from the bypass passage 31g, allowing the inflow of the return inflow port 31d is disposed of Have been.

The hot water switching valve chamber 32 is provided with a valve body 32a.
Is decorated. Seal members 32c and 32d are attached to the upper and lower ends of the valve body 32a in the figure. As shown in FIG. 5, the hot water switching valve chamber 3 is provided around the outer periphery of the valve body 32a.
A guide portion 32b that is in sliding contact with the inner wall 2 is formed radially. Further, a spring 32e made of a shape memory alloy is provided between the guide portion 32b and the end face on the side of the bypass passage 31g.
Is interposed. Further, a bias spring 32f is interposed on the opposite end side. Shape memory alloy spring 3
The transformation point of 2 is set based on the temperature of hot water,
At a temperature lower than the normal transformation point, the bias spring 32f is in a contracted state supported by the bias spring 32f, and the seal member 32c attached to the lower end closes the bypass passage 31g. When the shape memory metal spring 32 reaches the transformation point, it expands against the biasing force of the bias spring 32f, and the seal member 32d attached to the upper end of the spring 32d is supplied with the supply internal passage 31e.
, While the bypass passage 31g opens. In the embodiment shown in the figure, the shape memory alloy spring 32e is disposed at a position facing the supply-side inlet 31a in order to improve the heat-responsiveness to hot water.

The flow rate of the raw water can be adjusted by the needle valve 34 in accordance with the tap water pressure.

Next, the operation of the water treatment apparatus channel switching device will be described. In a state where it is attached in a predetermined manner, the flow path switching plug 11
When the operation lever 12d protruding from the tap is operated to connect the flow path from the faucet 1 to the water treatment device 21 side through the feed passage 12c formed in the valve body 12a, the raw water flowing from the faucet 1 becomes The hot water switching valve unit 3 is connected to an outlet 13 provided in the switching tap 11 through a supply passage 41 a of a parallel hose 41.
1A, the water treatment device 21
To

Since the temperature of the raw water is relatively low, the shape memory alloy spring 32e of the hot water switching valve chamber 32 interposed in the supply internal passage 31e does not reach the transformation point, so that the bypass passage 31g is closed. Until then, the raw water is fed to the water treatment device 21 as usual.

The water (purified or prepared) treated by the water treatment device 21 passes through the return passage 41b of the parallel hose 41 and passes through the return passage 31f formed in the hot water switching valve unit 31A. Through the passage switching plug 1
It reaches an inflow port 15 provided on the downstream side of 1 and is discharged from a water discharge port 14.

As described above, the passage switching plug 11, the hot water switching valve unit 31A, and the water treatment unit 21 are unified via the parallel hose 41, and the treated water is returned to the passage switching plug 11 again. Because it is returned, connection is easy. In addition, since only the flow path switching plug 11 needs to be attached to the faucet 1, it is lightweight and compact.

Furthermore, since each component is separated, it can be connected to various models, and maintenance and inspection and parts replacement are easy.

On the other hand, if hot water is erroneously flowed from the faucet 1 in this state, the hot water flows into the hot water switching valve chamber 32 formed in the supply internal passage 31e of the hot water switching valve unit 31A. Then, the hot water is applied to the shape memory alloy spring 32.
e, the shape memory alloy spring 32e immediately reaches the transformation point and expands, and the valve body 32a is biased by the bias spring 32e.
Sliding upward in the figure against the urging force of f, the seal member 32d mounted on the upper end closes the middle of the supply internal passage 31e and opens the lower bypass passage 31g in the figure.

Then, the hot water flows from the hot water switching valve chamber 32 through the bypass passage 31g to the return internal passage 31f.
Bypassed to the side. Since the return internal passage 31f is provided with the check valve 33, the hot water is supplied to the return outlet 3
It is guided to the side 1c and flows out from the inflow port 15 on the downstream side of the flow path switching plug 11 to the water discharge port 14 through the return passage 41b of the parallel hose 41. Therefore, even if hot water flows incorrectly, it does not flow to the water treatment device 21 side.

Of course, by operating the operation lever 12d,
A water discharge flow path 12 in which a flow path from a faucet 1 is formed in a valve body 12a.
If the water is connected to the water outlet 14 directly below via the b, the raw water, hot water, or a mixture thereof with the water flowing from the faucet 1 is discharged from the water outlet 14 as it is.

As shown in FIG. 6, the distance between the supply-side inlet 31a and the return-side outlet 31c and the distance between the supply-side outlet 31b and the return-side inflow passage 31d are equal. If it is set, the connection of the parallel hose 41 is facilitated, and the working efficiency is improved. When the pressure loss in the return flow path is large as in the hot water switching valve unit 31B shown in this embodiment, the check valve may be omitted. Reference numeral 32J protrudes from the lower end of the valve body 32a, and the bypass passage 3
It is a guide rod that slides along 1 g.

[0036]

[Effects of the Invention] As described above, according to the present invention,
Since the flow path switching plug attached to the faucet, the hot water switching valve, and the water treatment device were arranged separately, they were connected by a parallel hose, and the return flow path was returned to the flow path switching plug. , Unifying connections and simplifying the structure,
The connection work between each component is also facilitated. Also, since there is only one spout, it is convenient.

Since only the flow switching tap is attached to the faucet, it is possible to realize a light weight and compact size, and it is convenient to use.

In addition, since each component is separated as described above, it can be used for all types of models, and therefore has high versatility.

Further, if the interval between the outflow and inlet ports provided at both ends of the hot water switching valve is set to be equal to the interval between the parallel hoses, the connection work can be made more efficient.

[Brief description of the drawings]

FIG. 1 is a schematic view of an embodiment of a channel switching device for a water treatment device according to the present invention.

FIG. 2 is a cross-sectional view showing a state in which a three-way switching valve sets a flow path to a water discharge port side in a flow path switching plug.

FIG. 3 is a cross-sectional view showing a flow path switching plug in which a three-way switching valve sets a flow path to a water treatment device side.

FIG. 4 is a sectional view of a hot water switching valve unit.

FIG. 5 is a sectional view taken along line VV of FIG. 4;

FIG. 6 is a sectional view of a hot water switching valve unit according to another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Flow-path switching tap 12 Three-way switching valve 13 Outflow port 14 Outlet port 15 Inflow port 21 Water treatment device 21a Inlet port 21b Return port 31A, 31B Hot water switching valve 41 Parallel hose 41a Supply passage 41b Return passage

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) C02F 1/28 B01D 35/04 C02F 1/44 F16K 31/70

Claims (2)

(57) [Scope of request for utility model registration] Attachment to a faucet that allows raw water and hot water to freely mix and return from the faucet or from the water treatment device side
A water outlet that is installed separately from the outlet that discharges water and the faucet
The outlet for supplying water to the scientific instrument and the water returned from the water treatment unit side
And the water from the faucet,
Has a three-way switching valve for selectively leading to the discharge port and the outlet
And a supply-side inlet connected to the outlet of the flow-path switching tap
And a supply outlet for supplying water to the water treatment device;
A return inlet into which water returned from the water treatment device flows,
A return outlet connected to the inlet of the channel switching tap,
A supply for allowing the supply side inlet and the supply outlet to communicate with each other.
The supply internal passage is defined by the return inlet and the return outlet.
Bypass to return to the internal passage for return
The flow path and the water introduced from the supply inlet are hot water.
When this hot water flows through the bypass flow path,
A hot water switching valve for allowing the hot water to flow out of the flow outlet;
It has a hot water switching valve unit that is configured separately from the switching cock.
For example, test of the heat draining valve unit and the flow path switching換栓outlet
Supply-side inlet and return outflow of the hot water switching valve unit
The mouth and the inlet of the flow switching tap are connected by a parallel hose,
The supply outlet of the hot water switching valve unit and the water treatment
Inlet for scientific equipment, return port for the water treatment unit and the hot drain
The return inlet of the valve changing unit is connected with a parallel hose.
A flow path switching device for a water treatment device, comprising: 2. The bypass of the hot water switching valve unit
From the connection between the flow path and the internal passage for return,
Inflow from the return inlet to the portion located on the inlet side
2. The flow path switching device for a water treatment device according to claim 1, further comprising a check valve for permitting flow and preventing backflow .