JPH01199688A - Water cleaner and hot water inflow preventive device for water cleaner - Google Patents

Abstract

PURPOSE:To prevent degradation in function by forming a bypass water path in parallel with a water treatment part in which filter media are packed and switching a water flow passage to the water treatment part to the bypass water path by a hot water inflow preventive device which operates by detecting the hot water. CONSTITUTION:The shape of shrunk springs is stored as a memory shape into the open/shut springs 3C, 4C of a hot water inflow preventive valve 3 and a hot water discharge valve 4 and the shape of an elongated spring is conversely stored in the open/shut spring 7C of a backflow preventive valve 7. The open/ shut spring 3C of the hot water inflow preventive valve 3 attains the low temp. below a reset temp. by touching ordinary temp. water when the water of the ordinary temp. is supplied to this device from an intake pipe 2. The spring is then easily elongated even by the weak water pressure received by a valve disk 3b, by which the valve port 3a is opened to form the flow passage to the water treatment part 6. The feed water is thus cleaned in the water treatment part 6. The inflow of the hot water is thereby surely prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a water purifier that prevents hot water from flowing into a water treatment section and a hot water inflow prevention device for a water purifier.

(Prior Art) Generally, a water purifier is a water treatment device whose main purpose is to reduce dissolved substances such as residual chlorine in water using a furnace material such as activated carbon.

Home water purifiers were originally designed to purify room-temperature water such as tap water or water stored in a tank, but hot water supply systems have now become commonplace in ordinary households, allowing hot and cold water to be supplied from a single faucet. Usually, water at an appropriate temperature ranging from high temperature to room temperature can be easily supplied by mixing one or both of them.

For this reason, when a water purifier is attached to this faucet, high-temperature hot water may be passed through the water purifier. Normally, residual chlorine in high-temperature water has been sufficiently reduced, so there is no need to pass it through a water purifier. In the case of furnace materials made of synthetic resin, the heat from the hot water could deform the furnace material, degrading its performance as a water purifier.

(Challenge that the invention seeks to solve) For this reason, although conventional water purifiers on the market have a display prohibiting use with hot water, they do not have a mechanism to prevent hot water from flowing in, so it is difficult for users to handle them. If you make a mistake or use it in the above-mentioned hot water supply system, hot water may often flow into the water purifier, causing problems such as deteriorating water quality or damaging the furnace material, reducing its function as a water purifier. It was happening.

This invention was made to solve these problems, and provides a water purifier and a hot water inflow prevention device for a water purifier that can reliably prevent the inflow of hot water and eliminate the risk of functional deterioration due to hot water. The purpose is to provide

[Configuration of the Invention (Means for Solving the Problem) In order to achieve the above object, the water purifier of the present invention forms a bypass waterway in parallel with the water treatment section filled with the door material,
It is characterized by switching the water flow path to the water treatment section to a bypass waterway using a water leakage prevention device that is activated by detecting hot water.

The hot water inflow prevention device is characterized by the use of a flow path switching valve driven by a shape memory alloy that expands and contracts with temperature changes.

(Function) With the above configuration, when water at room temperature is supplied, the hot water inflow prevention device will not operate and a normal flow path will be formed from the intake pipe, through the water treatment section, to the water discharge pipe, and the water will be supplied. Water is purified in the water treatment section and discharged from the water discharge pipe.

However, the supplied water is hot water, and its temperature is at a predetermined temperature of III! When the water leakage inflow prevention device is activated, the water flow path is switched from the normal flow path 75) to a flow path that passes through the bypass waterway and reaches the water discharge pipe 1, and the water flows directly from the water discharge pipe without passing through the water treatment section. released.

Therefore, the deodorizing and filtration filters in the water treatment section are not exposed to high-temperature water, so the water quality will not deteriorate or the furnace material will be damaged.

In addition, when a flow path switching valve driven by a shape memory alloy that expands and contracts with temperature changes is used in the hot water inflow prevention device,
Since the shape memory alloy responds sensitively to temperature and expands and contracts, the flow path can be quickly switched and the inflow of hot water can be more reliably prevented.

(Example) Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

The attached drawing is a cross-sectional view showing the schematic configuration of this embodiment, and
is a water purifier! The body contains a water purification mechanism. 2 is a water intake pipe, and this water purifier is used by attaching the water intake pipe 2 to a water faucet, etc. From the water intake pipe 2, there is a hot water inflow consisting of a hot water inflow prevention valve 3, a hot water discharge valve 4, etc. A flow path to the water treatment section 6 is formed through the prevention device I15.

This water treatment section 6 includes a deodorizing filter for removing residual chlorine and residual substances from the supplied water, and a furnace material 6a such as activated carbon, polymer filtration material, or granular ion exchange resin that serves as a filtration filter. is filled.

A backflow prevention valve 7 that constitutes a part of the hot water inflow prevention device 5 is provided at the outlet of the water treatment section 6, and a water discharge pipe 8 for discharging water to the outside is provided on the outflow side of the valve 7. A bypass waterway 9 is also provided in parallel to the water treatment section 6 and connected to the outlet side of the hot water discharge valve 4.

The hot water inflow prevention device J3, the hot water discharge valve, and the backflow prevention valve 7, which constitute the hot water inflow prevention valve f5, are flow path switching devices that switch the water flow path to a bypass waterway when the supplied water exceeds a predetermined temperature. They operate as valves, each with a valve port 3.
a, 4a, 7a, and these valve ports 3a.

A valve body 3b for controlling the flow path by opening and closing 4a and 7a.

4b, 7b, and opening/closing springs 3c, 4c, which use shape memory alloy as the operating mechanism of the valve bodies 3b, 4b, 7b,
7c, and each of the opening/closing springs 3c, 4c, and 7c has one end connected to the valve body 3b.

4b and 7b, and the other end is fixed to the tube side of the flow path.

Shape memory alloys can be easily deformed with a relatively weak force at a temperature below a predetermined temperature, for example at room temperature, but once a predetermined return temperature is reached, they tend to immediately return to the memorized shape with a strong force. be.

In this embodiment, a hot water inflow prevention valve 3 and a hot water discharge valve 4 are provided.
The opening/closing springs 3C and 4C have a contracted spring shape stored therein, and the opening/closing spring 7c of the check valve 7 has an oppositely expanded spring shape stored therein.

In the water purifier of this embodiment configured as above,
When water at room temperature is supplied from the water intake pipe 2, the opening/closing spring 3c of the hot water inflow prevention valve 3 comes in contact with the room temperature water ζζ and is at a low temperature below the return temperature, so even relatively weak water pressure applied to the valve body 3b can easily be applied. It extends and opens the valve port 3a to form a flow path to the water treatment section 6, and the supplied water is purified in the water treatment section 6.

At this time, the opening/closing spring 4c of the hot water discharge valve 4 is also in room temperature water, so it is in a state where it can be deformed with a weak force, and the valve body 4b expands due to the water pressure received by the valve body 4b, blocking the valve port 4a and supplying room temperature. Water is prevented from flowing into the bypass waterway 9.

In addition, since the check valve 7 is also in room temperature water flowing out from the water treatment section 6, the opening/closing spring 7C is compressed by the water pressure applied to the valve body 7b, and the valve lower a is opened and the purified water is discharged through the water discharge pipe 8. released to the outside.

In this way, the supply water at normal temperature flows through the normal purification flow path passing through the water treatment section 6, is sufficiently purified in the water treatment section 6, and is supplied to the outside.

On the other hand, when hot water with a temperature higher than the return temperature of the shape memory alloy forming the opening/closing springs 3c, 4c, 7c is supplied from the water intake pipe 2, the opening/closing springs 3c, 4c detect the temperature and return to the memorized shape. In other words, it returns to its contracted spring shape.

Therefore, the valve port 3a is closed by the valve body 3b to block the flow path to the water treatment section 6 and prevent hot water from flowing into the water treatment section 6. At the same time, the valve element 4b of the hot water discharge valve 4 is pulled by the compressed opening/closing spring 4C to open the valve port 4a, leading the hot water to the bypass waterway 9, and directly discharging it to the outside through the water discharge pipe 8. At this time, the check valve 7 comes into contact with the hot water flowing through the bypass waterway 9, so the opening/closing spring 7c returns to its memory shape, that is, the expanded spring shape, the valve body 7b shuts off the valve lower a, and the hot water flows into the water treatment section. Prevent backflow to 6.

In this way, hot water with a temperature higher than a predetermined temperature does not pass through the water treatment section 6, and is directly discharged through the channels of the water intake pipe 2, bypass waterway 9, and water discharge pipe 8.

Note that the present invention is not limited to the above-mentioned embodiments, and can be implemented with various modifications without changing the gist.

In the above embodiment, the opening/closing springs of the hot water inflow prevention valve, hot water discharge valve, and backflow prevention valve each use a shape memory alloy that has a relatively large displacement stroke and is sensitive to operation. It may be made of a normal elastic member.

[Effects of the Invention] According to the present invention, it is possible to provide a water purifier that can prevent the inflow of hot water and is free from the risk of functional deterioration due to hot water.

In addition, a hot water inflow prevention device that uses a flow path switching valve driven by a shape memory alloy that expands and contracts with temperature changes can quickly switch the water flow path and more reliably prevent hot water from flowing in. be able to.

[Brief explanation of the drawing]

The accompanying drawings are explanatory diagrams showing a schematic configuration of an embodiment of the present invention. 1...1 body 2...Intake pipe 3
... Hot water inflow prevention valve 4 ... Hot water discharge valve 5 ... Hot water inflow prevention device 6 ... Water treatment section 6a ... Furnace material 7
・・・・・・Backflow prevention valve ８・・・・・・Patent attorney representing the water pipe applicant Noriyuki Chika

Claims (2)

[Claims] (1) A water treatment section filled with a filter medium, a bypass waterway provided in parallel to the water treatment section, and a bypass waterway that is activated by detecting hot water and bypasses the water flow path to the water treatment section. A water purifier characterized by being equipped with a hot water inflow prevention device that switches to a water channel. (2) A hot water inflow prevention device for a water purifier, characterized by using a flow path switching valve driven by a shape memory alloy that expands and contracts with temperature changes.