JPS6125685A - Ultraviolet water sterilizer - Google Patents

Abstract

PURPOSE:To sterilize perfectly by providing a control circuit having a switch, which is operated by the supply of water into a feedwater tank and the stoppage of the water supply, and a timer interlocked to the switch. CONSTITUTION:When water is supplied into a feedwater tank 1, a switch S is turned on. Consequently, a relay X is operated to open a contact Xa, and a contact Xb is closed to light a sterilizing lamp 2. Then sterilization is carried out with ultraviolet light. When the supply of water is stopped, the switch S is automatically opened, the contact Xa is closed by the signal from the relay X, an on-delay timer T1 is operated, and a timer contact Ta is simultaneously closed. After T seconds, the timer contact Ta is opened, and the sterilizing lamp 2 is turned off.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a device that completely sterilizes water in a water supply tank by irradiating it with ultraviolet rays and makes it possible to always supply sterilized water when water is supplied. It is something.

<Conventional technology> Traditionally, chlorine sterilization was used to sterilize drinking water, etc., but in recent years, chlorine sterilization has been used in industries such as medical, pharmaceutical, cosmetics, electronics, and food industries, which dislike the effects of chlorine. Water is sterilized using ultraviolet light, which does not change water quality and does not use chemicals such as chlorine.

The above method of sterilization using ultraviolet rays involves installing an ultraviolet lamp in a water tank, and lighting the lamp to irradiate ultraviolet rays and sterilize the water in the tank.

<Problems to be solved by the invention> Since sterilization using ultraviolet rays can only be performed when the lamp is on, it is necessary to keep the lamp on at all times in order to completely sterilize the water in the circulating tank. However, this has the problem that the lamp wears out rapidly and the water temperature in the tank increases due to the heat dissipated from the constantly lit lamp. Therefore, if the ultraviolet lamp is turned on only when water is supplied from the tank, consumption of the lamp and increase in water temperature can be suppressed. However, since UV lamps take several seconds to emit sufficient UV light after being turned on, unsterilized water may be supplied during this time, and furthermore, if the lamp is turned off immediately after bacteria enter the tank, water may remain for a long time. When this occurs, the bacteria move and disperse, causing problems such as bacteria near the tank outlet being supplied without being sterilized when water is supplied.

The present invention was developed to improve the above-mentioned conventional problems.

<Means for Solving the Problems> One means according to the present invention for solving the above conventional problems will be explained with reference to the drawings. In FIGS. 1 and 2, 1 is inside. This is a water supply tank having an ultraviolet germicidal lamp 2, and is constructed so that water flowing in from an inlet 3 is sterilized by ultraviolet irradiation from the germicidal lamp 2 while it flows out from an outlet 4. Reference numeral 5 denotes a control panel for lighting the sterilizing lamp 2 according to the state of water supply, and has a circuit as shown in FIG. 2.

In Fig. 2, X is a relay, T1 is an on-delay timer, and U is a sterilizer, each of which is connected in parallel to a power source E, and the relay X has a switch S that opens and closes when water supply starts and stops. (flow switch, etc.) are connected in series, and the timer T1 and the sterilizer UV have relay contacts X and X, which are operated by the relay X,
are connected in series, and a timer contact T1, which opens and closes according to the operation of a timer T1, is connected in parallel to the relay contact X of the germicidal lamp, thereby forming a control circuit.

<Function> Next, the operation of the device with the above configuration will be explained. As shown in the time chart of FIG. 3, when water is supplied into the water supply tank 1, switch S is automatically turned on, and relay
operates to open contact X, close contact X, and turn on sterilization lamp 2, thereby sterilizing the water in water supply tank 1 with ultraviolet rays. Next, when the water supply in the water tank L is stopped, the switch S is automatically opened in response to this.
A signal from relay X closes contact XIl, and on-delay timer T operates, and at the same time, timer contact T
Close. Therefore, even if contact X, which operates in conjunction with contact

opens and turns off the sterilization lamp 2.

Immediately, the water supplied into the water supply tank 1 is completely sterilized within T seconds after the water supply is stopped, and when water is supplied again, sterilized water is supplied.

In order to always supply sterilized water from the water supply tank 1, the capacity of the tank 1 must be greater than a certain capacity. That is, the time required for the sterilizing lamp 2 to completely light up after turning on the switch S is t (s), and the lamp lighting time required to completely sterilize the water in the water tank 1 is T (s).
, the flow rate of water flowing into and out of water tank 1 is Q (n?
/s ), then water tank 1 (7) capacity v (rt)
requires the relationship ■≧Q(t+T).

<Embodiment> Next, FIG. 4 shows an embodiment in which the control circuit is configured using an off-delay timer. This connects the switch S and the off-delay timer T2 in series, and also connects the contact 1 of the timer T2 and the sterilization bag Hyuv in series,
These are each connected to a power source E in parallel.

The operation of the above circuit is as shown in Fig. 5, when the switch S is turned on at the same time as water is supplied into the tank, the contact '' is closed by a signal from the timer T2, and the germicidal lamp 2 is turned on.
lights up. Next, when the water supply is stopped, the switch S is opened, and the timer T2 is activated and the contact T is closed after the set time T seconds.

is opened to turn off the lamp 2.

<Effects of the Invention> As described above, the device according to the present invention, after stopping the water supply to the tank,
The water in the tank is completely sterilized by incorporating a circuit that turns on the sterilizing lamp for a certain period of time, and the water supplied from the tank is always sterilized, and the sterilizing lamp does not need to be lit all the time. The lamp life can be extended, the water temperature does not rise due to lamp heat, and the device can be made smaller depending on the usage, so less installation space is required, and the water quality does not change during sterilization. .

[Brief explanation of the drawing]

FIG. 1 is an explanatory perspective view of the device according to the present invention, FIG. 2 is an explanatory diagram of the control circuit, FIG. 3 is an operation time chart of the device, and FIGS. 4 and 5 are explanatory diagrams of the other side. 1 is a water tank, 2 is an ultraviolet germicidal lamp, 5 is a control panel,
X is a relay, T + , T z are timers, UV is a sterilizer, E is a power supply, S is a switch, X, , Xb. T 1T b is a contact point.

Claims (1)

[Claims] In a device that sterilizes water by irradiating ultraviolet rays with an ultraviolet germicidal lamp installed in the water tank, there is a switch that operates when water is supplied to the water tank and the water supply is stopped, and a switch that operates for a certain period of time after the water supply is stopped in connection with the switch. 1. An ultraviolet water sterilizer, comprising: a control circuit having a timer; the sterilizer lamp is turned on at the same time as water is supplied to a water supply tank; and the sterilizer lamp is turned off after a certain period of time has elapsed after the water supply is stopped.