JPH0225516Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a water purifier that is connected to a water supply and performs purification processes such as removing impurities and odors using a stored purification agent. In particular, it is used to prevent deterioration of sanitary conditions due to contamination of water remaining in water purifiers over time.

[Prior Art] Recently, especially in urban areas, it has become common practice to connect water purifiers containing, for example, activated carbon, ion exchange resin, etc. to the water supply, and use the tap water that has passed through the water purifier for drinking. ing. but,
The tap water remaining in the water purifier has the chlorine added as a disinfectant adsorbed and removed by the purifying agent in the water purifier, making it susceptible to the propagation of various bacteria. Therefore, with the passage of time when the water purifier is not in use, bacteria grow in the water remaining in the water purifier, which then flows out of the water purifier as drinking water the next time it is used, causing a deterioration in sanitary conditions. .

Conventionally, in order to solve the above-mentioned problem, it has been known to preliminarily support silver in a purifying agent, and to suppress the growth of germs by the small amount of silver ions eluted (Japanese Patent Publication No. 38666/1983).

However, the amount of silver ions eluted above is
Since it varies depending on the chlorine concentration of water, temperature, etc., there is a risk that silver ions may not be eluted enough to sufficiently suppress the proliferation of germs, or on the contrary, excessive silver ions may be eluted. If the amount of silver ions eluted is too small, the desired effect will not be obtained, and if the amount of silver ions eluted is too large, it will end up harming human health, so it is not reliable and safe. .

[Problem to be solved by the invention] The problem to be solved by the invention is to ensure and safely prevent deterioration of sanitary conditions due to contamination of water remaining in a water purifier over time. It is something.

[Means for Solving the Problems] In the present invention, the measures taken to solve the above problems are as follows: In a water purifier that stores a purifying agent and is connected to a water supply, the inflow side of the tap water A pressure switch is installed on the side, and a water intake and drain are installed via a control valve on the outflow side of the tap water.
Furthermore, the water purifier is equipped with a controller that controls the opening and closing of a control valve so that when the pressure switch detects the supply of tap water, the water is discharged from the drain port for a predetermined period of time, and after the predetermined period of time has elapsed, the water is discharged from the water intake port. That is to say.

[Function] According to the above means, water flowing out of the water purifier can be discharged from the drain port until the inside of the water purifier is replaced with newly introduced tap water. That is, at the time of use, the water that had previously remained in the water purifier is flushed away from the drain port by the newly introduced tap water, and the water that flows out from the water intake port from which drinking water is taken is replaced by the newly introduced tap water. This is something that can be done.

[Example] In FIG. 1, reference numeral 1 denotes a water purifier in which a purifying agent (not shown) is stored, and its tap water inflow side is connected to a water faucet 3 via a manual three-way valve 2. ing. The manual three-way valve 2 allows the user to select whether water from the faucet 3 flows directly into a sink (not shown) or is sent to the water purifier 1. Further, a pressure switch 4 is provided on the tap water inflow side. This pressure switch 4 is activated by the pressure of tap water when tap water is supplied from the faucet 3 to the water purifier 1, and automatically detects the supply of tap water to the water purifier 1 and the stoppage of the supply. It is for the purpose of

A water intake port 6 and a drain 7 are provided on the outflow side of the water purifier 1 via a control valve 5. The water intake port 6 is for taking out the water that has passed through the water purifier 1 as drinking water, and the drain port 7 is for taking out the water that has passed through the water purifier 1 as drinking water.
This is to drain the water flowing out into the sink etc.

The control valve 5 is, for example, a solenoid valve that can be electrically controlled to open and close, and the control valve 5 in this embodiment is a three-way valve. This control valve 5 is electrically connected to a controller 8. The controller 8 is electrically connected to the pressure switch 4 and controls the opening and closing of the control valve 5 based on signals from the pressure switch 4.

Further, the controller 8 will be explained. When the pressure switch 4 detects the supply of tap water and a signal is sent to the controller 8, the controller 8 opens the drain 7 side and closes the water intake 6 side, and then closes the control valve 5 for a certain period of time.
maintain. Therefore, when the faucet 3 is first opened,
The water does not flow out from the water intake port 6, but is discharged from the drain port 7 to the sink, etc., and as a result, the water in the water purifier 1 replaces the old water that remained in the water purifier 1 after the previous use. The inside will be replaced with new water.
After a predetermined period of time has elapsed, the controller 8 closes the control valve 5.
A signal is issued to open the water intake port 6 side and close the drain port 7 side. As a result, water is taken out from the water intake port 6 as drinking water. Then, when the faucet 3 is closed and the pressure switch 4 detects that the tap water supply has stopped, and this signal is sent to the controller 8, the controller 8 opens the drain port 7 side and the water intake port 6 side. Either return the control valve 5 to the closed state and prepare for the next use, or switch the control valve 5 to close both the water intake 6 and drain 7.

The time from opening the faucet 3 until water is taken out from the water intake 6, that is, the time from switching the open side of the control valve 5 from the drain port 7 side to the water intake 6 side, is determined by the capacity of the water purifier 1. Although it varies depending on the degree of opening of the faucet 3, it is preferably about 2 seconds to 10 seconds. If it is too short, a large amount of old water will be mixed in and easily flow out from the water intake port 6, while if it is too long, water will be wasted. In order to ensure that old water can be discharged from the drain port 7 within a set time without being affected by the degree of opening of the faucet, a constant flow valve is installed on the inlet side of the tap water to drain it into the water purifier 1. It is preferable to keep the flow rate of incoming water as constant as possible.

In this embodiment, the control valve 5 is a three-way valve, and both the water intake port 6 and the drain port 7 are connected to one control valve 5, but instead of being a three-way valve, the water intake port 6 side and the drain port 7 are An independent control valve may be provided for each. In this case, it is sufficient to control the opening and closing of both control valves alternately.
While the supply of tap water is stopped, both valves may be closed to seal the inside of the water purifier 1. Further, although it is not necessary that the purifying agent specifically supports silver, there is no problem even if it supports silver.

[Effect] According to the present invention, after the faucet is opened, the old water remaining in the water purifier is discharged from the drain port, and then the water flows out from the water intake port, which reduces the amount of water that is released as drinking water. The water is always fresh and free of germs. Therefore, hygiene can be further improved. In addition, since there is no need to use special chemicals, there is no fear of harm from dissolved chemicals, and it is highly safe.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing an embodiment of a water purifier according to the present invention. 1: Water purifier, 2: Manual three-way valve, 3: Faucet, 4:
Pressure switch, 5: control valve, 6: water intake,
7: Drain port, 8: Controller.

Claims (1)

[Scope of utility model registration request] In a water purifier that stores a purifying agent and is used by being connected to a water supply, a pressure switch is provided on the inflow side of the tap water, and a water intake port and a drain port are provided on the outflow side of the tap water via a control valve. Furthermore, when the pressure switch detects the supply of tap water, a controller is provided that controls the opening and closing of the control valve so that the water is discharged from the drain port for a predetermined period of time, and after the predetermined period of time has elapsed, the water is discharged from the water intake port. Characteristic water purifier.