JPH0691257A - Water purifier - Google Patents

Abstract

PURPOSE:To provide a water purifying tool, by which the life of a cartridge can be detected with a simple constitution and inexpensively. CONSTITUTION:A cartridge 4 filtering water, an electromagnetic valve 3 switching a water feeding pipe 1 feeding water to this cartridge 4, a timer integrating the opening time of the water feeding pipe 1 and a switch 5 for switching flow quantity are provided, and this tool is constituted in such a way that the life of the cartridge 4 is detected by both the opening time integrated by means of the timer 7b and decrease in the flow quantity detected by means of a flow quantity switch 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a domestic water purifier for filtering tap water at home.

[0002]

2. Description of the Related Art In recent years, the number of households using water purifiers for filtering tap water has been increasing.

A conventional water purifier will be described below with reference to FIGS. As shown in the figure, in the water supply pipe 21, a manual water faucet 22 for adjusting the amount of water, a solenoid valve 23 for opening and closing the water supply passage, a cartridge 24 for filtering water, a flow rate switch 25 for detecting the amount of water, This flow rate switch 25
The discharge pipe 26 was provided through the.

The solenoid valve drive circuit 27a for opening and closing the solenoid valve 23, the life detecting circuit 27b for detecting the life of the cartridge 24 by the signal of the flow rate switch 25, and the life displaying circuit 27c constitute the control circuit 27. An operation switch 28 for opening and closing the solenoid valve 23 is connected to the solenoid valve drive circuit 27a.

In the case of purifying water in the above structure, when the operation switch 28 is pushed, the solenoid valve 23 is opened via the solenoid valve drive circuit 27a and tap water is supplied to the water supply pipe 21 and the solenoid valve 23.
Then, the tap water was purified by the cartridge 24, and the purified water by the cartridge 24 was supplied from the discharge pipe 26 through the flow rate switch 25.
At this time, the amount of water is adjusted in advance by the manual water faucet 22 for adjusting the amount of water so that the amount of clean water to be supplied is appropriate, and the life of the cartridge 24 is detected by detecting that the amount of water detected by the flow rate switch 25 is constant. Cartridge 2 when the amount of water drops below
It was judged that the life was 4 and was displayed.

The operation of the control circuit at this time will be described with reference to a time chart and a flow chart. The amount of water at the start of use is adjusted to 6 l / min, for example, with the manual water faucet 22 for adjusting the amount of water.

Then, when the operation switch 28 is pushed, the solenoid valve 23 is opened and water flow is started. If the amount of water at this time becomes equal to or less than the set amount of water (for example, 3 l / min), it is determined that the cartridge 24 has reached the end of its life. At this time, the components of tap water removed by the cartridge 24 are residual chlorine and turbidity, but the amount of water that can be detected is when the amount of water decreases due to removal of turbidity, and the life of the cartridge 24 for removal of residual chlorine It was not detected.

[0008]

In such a conventional method, when the quality of tap water is high in turbidity components and residual chlorine is low, it is sufficient as shown in FIG. 4 (a).

However, when the residual chlorine increases due to the recent deterioration of water quality and the turbidity is low, the residual chlorine removal rate is the life (removal rate 90%) although the amount of water is large as shown in FIG. 4 (b).
However, there is a problem that the life of the cartridge 24 is not determined. In addition, the method of detecting the life of the cartridge, which can detect both turbidity and residual chlorine regardless of the water quality of tap water, is expensive, and the configuration of the detection system is large and cannot be used for home use. There was a problem.

An object of the present invention is to solve the above problems, and an object thereof is to provide a water purifier which has a simple structure, is low in cost, and can detect the life of a cartridge.

[0011]

In order to achieve the above object, a water purifier of the present invention has a cartridge for filtering water, a means for opening and closing a water supply passage for supplying water to the cartridge, and an opening of the water supply passage. A timer for integrating time and a flow rate detecting means are provided, and the life of the cartridge is detected based on both the opening time integrated by the timer and the decrease in the flow rate detected by the flow rate detecting means.

[0012]

According to the present invention, with the above-described structure, the open time of the water purifier is integrated by the timer to detect the life of the cartridge for residual chlorine, the flow rate detecting means detects the decrease in the flow rate, and the cartridge for turbidity is detected. The life of the cartridge is detected, and the life of the cartridge is displayed by the earlier of both detection results.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

As shown in the figure, a water supply pipe 1 has a manual water faucet 2 for adjusting the amount of water, a solenoid valve 3 for opening and closing a water supply passage, a cartridge 4 for filtering water, and a flow rate switch for detecting the amount of water. 5 and the discharge pipe 6 through the flow rate switch 5.

The solenoid valve drive circuit 7a that opens and closes the solenoid valve 3 and the time accumulated by the signal from the flow rate switch 5 or the timer 7b that accumulates the time when the solenoid valve 3 is open and the water supply passage is opened. Life detection circuit 7c for detecting the life of the cartridge 4 and life display circuit 7
A control circuit 7 is constituted by d, and a switch 8 for opening / closing the solenoid valve 3 is connected to the solenoid valve drive circuit 7a.

In the above construction, when the operation switch 8 is pressed to purify water, the solenoid valve 3 is opened via the solenoid valve drive circuit 7a and tap water enters the cartridge 4 through the water supply pipe 1 and the solenoid valve 3. The tap water is purified by the cartridge 4, and the purified water by the cartridge 4 is the flow rate switch 5
Water is supplied from the discharge pipe 6.

Further, in order that the amount of purified water supplied becomes appropriate,
The amount of water is adjusted to 6 l / min in advance with the manual water faucet 2 for adjusting the amount of water, and the life of the cartridge 4 is detected by
For residual chlorine, the time when the operation switch 8 is pressed and the solenoid valve 3 is opened is integrated by the timer 7b, and when the time of the timer 7b becomes equal to or more than the set value (1000 min), it is judged as the life.

Regarding the turbidity, when the flow rate switch 5 is below the set water amount (3 l / min), it is judged that the life has expired. Then, the life is displayed via the life display circuit 7d for the one having the earlier cartridge life due to residual chlorine and turbidity.

If the set value of the timer 7b is set according to the residual chlorine removing ability of the cartridge 4, the residual chlorine is measured at the place of use, and the set value of the timer 7b can be changed, the residual chlorine concentration can be changed. It is possible to accurately detect the life of the cartridge 4 even when is different depending on the range.

[0020]

As is apparent from the above embodiments, the present invention has an opening / closing means for opening / closing a water supply passage for supplying water to a cartridge for filtering water, a timer for integrating the opening time of the water supply passage, and a flow rate. Since the life of the cartridge is detected based on both the opening time accumulated by the timer and the decrease in the flow rate detected by the flow rate detection means, a simple structure is provided to reduce the cost and the life of the cartridge. A water purifier capable of detecting can be provided.

[Brief description of drawings]

FIG. 1 is a block diagram of a water purifier according to an embodiment of the present invention.

FIG. 2 (a) Time chart of life detection of the water purifier (b) Flow chart showing a life detection method of the water purifier

FIG. 3 is a block diagram of a conventional water purifier.

FIG. 4 (a) Time chart of life detection when the turbidity is high (b) Time chart of life detection when the turbidity is low

FIG. 5 is a flowchart showing the same life detection method.

[Explanation of symbols]

 1 Water supply pipe (water supply passage) 3 Electromagnetic valve (opening / closing means) 4 Cartridge 5 Flow rate switch (flow rate detecting means) 7b Timer

Claims (1)

[Claims] 1. A cartridge for filtering water, and an opening / closing means for opening / closing a water supply channel for supplying water to the cartridge,
A timer for integrating the opening time of the water supply channel and a flow rate detecting means are provided, and the life of the cartridge is detected by both the opening time integrated by the timer and the decrease in the flow rate detected by the flow rate detecting means. Water purifier.