KR20080034054A - Apparatus for manufacturing sterilizing water - Google Patents

Abstract

An apparatus for preparing sterilizing water is provided to prevent an undiluted solution from continuously flowing out through mixers although an operation of the apparatus is stopped, prevent a large amount of water from flowing into the raw water side through the mixers when an operation of the apparatus is stopped, avoid precipitation of crystals, and operate the apparatus although a user does not perform a crystal removing operation. In an apparatus(100) for preparing sterilizing water by mixing an aqueous acid solution of hydrochloric acid, acetic acid, or a mixture thereof, and a chlorine-based aqueous solution of sodium hypochlorite, chlorine dioxide, or a mixture thereof with water, the apparatus comprises: a water flow path(30); undiluted solution storage tanks(14A,14B) which store an undiluted solution of the aqueous acid solution or the chlorine-based aqueous solution such that a surface level of the undiluted solution stored in the undiluted solution storage tanks is maintained to a predetermined height; mixers(40A,40B) which are installed on the flow paths(30A,30B), and mix the undiluted solution with water by sucking the undiluted solution supplied from the undiluted solution storage tanks into water; and an overflow tank(42) which overflows the water mixed by the mixers at the predetermined height by the undiluted solution of at least one of the aqueous acid solution and the chlorine-based aqueous solution, and which receives an outlet(30a) of the flow path at the downstream of the mixers in a flow of water at a position higher than the predetermined height.

Description

Apparatus for producing sterilized water {APPARATUS FOR MANUFACTURING STERILIZING WATER}

1 is a block diagram showing the configuration of a sterilizing water production apparatus according to an embodiment of the present invention.

2 is a cross-sectional view showing the configuration of a stock solution cartridge of a sterilizing water producing apparatus according to an embodiment of the present invention.

It is sectional drawing which shows the structure of the flow sensor of the sterilizing water production apparatus which concerns on embodiment of this invention.

4 is a block diagram showing the configuration of a part for supplying a stock solution in a sterilizing water producing apparatus according to another embodiment of the present invention.

5 is a block diagram showing the configuration of a portion for supplying a stock solution in a sterilizing water production apparatus according to still another embodiment of the present invention.

6 is a block diagram showing the configuration of a part for supplying a stock solution in a sterilizing water production apparatus according to still another embodiment of the present invention.

<Description of the code | symbol about the principal part of drawing>

12: Stock Cartridge

14 container

16, 68: Euro

20: flow sensor

22: liquid part

30: euro

32: solenoid valve

40: mixing device

42: overflow tank

48: sterile water tank (tank)

54: air valve

100, 150, 160, 170: sterilization water production apparatus

The present invention relates to an apparatus for producing sterile water. In more detail, this invention relates to the manufacturing apparatus of the chlorine system sterilizing water which adjusted the acidity.

Conventionally, the apparatus which manufactures sterilizing water with strong sterilizing power by adjusting the acidity (pH) of chlorine sterilizing water is produced. In this sterilizing water production apparatus, sodium hypochlorite which is mixed with an aqueous solution of hydrochloric acid or the like for adjusting pH in a water stream as a stock solution and becomes a stock solution of sterilizing water in the water stream. Sterilized water is prepared by mixing aqueous solution (for example, patent document 1).

[Patent Document 1] Japanese Patent Application Laid-Open No. 2003-200174

In the conventional apparatus for producing sterilized water, when the mixer is an ejector using negative pressure generated by water flow, etc., when the apparatus is stopped, the chlorine-based aqueous solution or the stock solution of the acidic aqueous solution is introduced into the water in the mixer. There is a problem that is easy to leak. In order to prevent this, it is effective to shut off the supply path by a valve or the like, but if any defect occurs in the valve, it cannot be prevented from leaking.

In addition, in the conventional apparatus for producing sterilizing water, when the concentration of the chlorine-based aqueous solution or acid solution is increased, the tank (stock solution tank) that accumulates the chlorine-based aqueous solution or acid solution can be miniaturized, or the chlorine-based aqueous solution or acid There is an advantage that the frequency of replenishment of the aqueous solution is reduced. However, when the concentration of the stock solution is made high, it is necessary to stably mix the stock solution with a small flow rate from the mixing apparatus. Even if such a small flow rate is to be measured by a conventional rotary vane type flow meter, there is a problem that stable flow rate measurement is difficult in the actual operation in which bubbles are contained in the mixed raw liquid to be mixed or foreign substances are contained. In addition, there is a flow meter for measuring the micro flow rate using ultrasonic waves, but such a flow meter has a problem of being expensive.

Moreover, in the conventional apparatus for producing sterile water, there is a problem in that crystals are precipitated when the sodium hypochlorite aqueous solution is mixed in the mixing machine. Since this crystal blocks the supply passage through which sodium hypochlorite passes, there is a problem that this must be removed on a regular basis in order to realize stable mixing.

An object of the present invention is to solve at least some of the above problems.

In the present invention, an apparatus for producing sterilized water prepared by mixing an aqueous solution of hydrochloric acid or acetic acid, or a mixture thereof, and a chlorine-based aqueous solution of sodium hypochlorite or chlorine dioxide, or a mixture thereof in water, wherein the water flow path and the acid The stock solution of an aqueous solution or a chlorine-based aqueous solution is stored, and the stock solution of the stored stock solution is maintained at a predetermined height, and the stock solution provided in the flow path and supplied from the stock solution reservoir to water. A mixer for inhalation and incorporation, and at least one of an aqueous solution of an aqueous solution or a chlorine-based solution overflows the water mixed by the mixer at the predetermined height, and in the flow of water, An overflow tank for receiving the outlet of said flow path downstream, said position being lower than said predetermined height. There is provided an apparatus for producing sterile water.

In the sterilizing water producing apparatus, for example, an acid aqueous solution and a chlorine-based aqueous solution are mixed and diluted in water (raw water) such as tap water. As an example, the pipe (flow path) of the tap water of one system is branched into two systems, and an acid aqueous solution and a chlorine-based aqueous solution are mixed in each system. In the bright sensor, the acid aqueous solution and the chlorine-based aqueous solution before dilution thereof are called stock solutions. This stock solution is prepared in advance at a predetermined concentration so as to be diluted at a predetermined ratio. The dilute acid solution and the dilute chlorine-based solution prepared in this way are accumulated in the tank separately and mixed with each other in the amount necessary for use as sterilized water to produce sterilized water, or immediately mixed with each other to be sterilized water and accumulated in the tank. Or

The stock solution of the acidic aqueous solution or the chlorine-based aqueous solution is stored in the stock solution reservoir. The liquid level of the stored stock solution is maintained at a predetermined height by any method such as using an overflow.

 The mixing machine may use an ejector or the like that sucks and mixes using a negative pressure generated in a water stream in which a flow rate is increased by tightening a flow path. When the stock solution from the stock solution reservoir is mixed with water by a mixer, a dilute acid solution or a dilute chlorine-based aqueous solution is produced. For example, the dilute acid solution and the dilute chlorine-based solution are accumulated in separate tanks. Inside this tank is provided an overflow tank to receive the outlet of the pipe extending from the inlet machine. This overflow tank overflows at the predetermined height mentioned above, and the liquid level is hold | maintained. The outlet of the pipe exiting the intake is accommodated by the overflow tank at a position lower than the liquid level of this overflow.

In this way, since the liquid level of the overflow tank and the liquid level of the stock solution reservoir can be trimmed, even if the sterilizing water production apparatus is stopped, it is possible to prevent the stock solution from flowing out through the mixing device.

In such a sterilizing water producing apparatus, the stock solution reservoir has an opening facing downward to allow the stock solution to flow out, and a stock solution tank having an airtight structure other than the opening portion is accommodated from the bottom of the opening. When the liquid level of the stock solution stored in the reservoir is lower than the predetermined height, it is possible to supply the stock solution from the stock solution tank and / or to supply the air into the stock solution tank through the opening, and the liquid surface is supplied to the predetermined surface. It is preferable if the opening of the stock solution tank is blocked when at the height.

The stock solution tank for supplying stock solution can be used for the stock solution storage section. The stock solution tank is provided with an opening facing downward, and the liquid level is automatically fixed to a predetermined height when the opening is other than the opening. When the liquid level of the stock solution container is at a height that allows the access of the stock solution and air from the opening of the stock solution tank, the stock solution flows out from the stock tank and is supplied to the stock solution container, and the stock solution is supplied to the stock solution container. This is because the supply of the raw liquid from the raw liquid tank stops when the liquid level reaches a height at which the raw liquid and the air from the opening of the raw liquid tank cannot enter or exit. In this way, the height of the liquid surface is maintained in the stock solution container, and the mixing operation to the mixing machine is stabilized.

In this invention, the manufacturing apparatus of the sterilizing water of another form is provided. That is, a device for producing sterile water prepared by incorporating an aqueous solution of hydrochloric acid or acetic acid, or a mixture thereof, and a chlorine-based aqueous solution of sodium hypochlorite or chlorine dioxide, or a mixture thereof into water, the water passage and the passage A mixer for inhaling and incorporating a stock solution of an aqueous solution or a chlorine-based aqueous solution into water, and the stock solution overflowing the water mixed by the mixer with a predetermined height, and downstream of the mixer in the flow of water. An overflow tank for accommodating the outlet of the flow path at a position lower than the predetermined height, and a flow meter provided in the supply path of the raw liquid to the mixing device, and communicates with the air by a passage and communicates with the supply path. And a liquid level detecting portion having one predetermined volume and at least two liquid level detecting means for detecting the liquid level of the liquid portion at another liquid level, The atmospheric opening of the passage is provided at a position higher than the predetermined height, and the liquid level detecting means detects the liquid level at the time of supply of the raw liquid from the liquid flow portion to the supply path. There is provided an apparatus for producing sterilizing water, comprising a flow meter for detecting the flow rate of a stock solution.

In this embodiment, the supply path of the raw liquid can be provided with a flow meter suitable for the measurement of the micro flow rate. This flowmeter has a liquid volume part of a predetermined volume communicating with the atmosphere by an air hole (path). The flowmeter also has at least two liquid level detecting means for detecting the liquid level of the liquid flow section at different liquid level. The liquid level detecting means may be configured of, for example, a liquid flow portion by a light transmitting cylinder, and the liquid level can be detected by determining the presence or absence of the stock solution in the pipe by light from the side surface, but not limited to this example. This flow meter can be used, for example, in pairs with a solenoid valve provided upstream of the feed passage of the stock solution. In this case, when the flowmeter is provided in the supply path downstream from the solenoid valve, the solenoid valve is opened to detect the liquid level when the raw liquid collected in the flow portion of the flowmeter flows out of the liquid portion while the solenoid valve is closed. In this flow meter, the liquid level detection means detects the liquid level at least two different heights, and measures the time between detecting the liquid level. Thereby, for example, even if it is a minute flow volume, or even if air or a foreign material contains a little in the stock solution, a flow volume can be measured correctly. The liquid flow portion communicates with the atmosphere through a passage to remove air from the liquid flow portion of the flowmeter.

This can prevent water from flowing out to the raw water side through the mixing device when the apparatus is stopped.

In still another aspect of the present invention, in a supply passage or a flow meter for supplying a stock solution of an acid aqueous solution and a chlorine-based aqueous solution, the stock solution supplied to the incorporator is changed while preventing direct contact between the acid aqueous solution and a chlorine-based aqueous solution. There is provided a sterilizing water production apparatus having a configuration in which the crystals are easily removed and are not adversely affected by the crystals. That is, in the present invention, as an apparatus for producing sterilized water in which an acid aqueous solution of hydrochloric acid or acetic acid, or a mixture thereof, and a chlorine-based aqueous solution of sodium hypochlorite or chlorine dioxide, or a mixture thereof are mixed with water, the apparatus is used for producing a sterilized water. And a first stock solution reservoir for storing the stock solution of the acidic aqueous solution, a second stock solution reservoir for storing the stock solution of the chlorine-based aqueous solution, and a channel formed in the flow path, and the acid aqueous solution or the chlorine-based aqueous solution in a portion of the flow path of the flow path. A first mixing device for sucking and mixing any of the stock solutions, and is provided in the flow path, and for inhaling and mixing the stock solution of either the acid aqueous solution or the chlorine-based aqueous solution to the other part of the flow of the flow path A supply to which the stock solution of the acid solution from the first stock solution reservoir is supplied with a second mixer and connected to the first mixer; A first connection configuration for connecting a supply path to which the stock solution of the chlorine-based aqueous solution from the second stock solution reservoir is supplied to a supply path connected to the second mixer, and the first stock solution reservoir from the first stock solution reservoir. A supply path through which a stock solution of arithmetic solution is supplied to a supply path connected to the second mixer, and a supply path through which a stock solution of the chlorine-based aqueous solution from the second stock solution reservoir is supplied to the first mixer Switching means for switching a second connection configuration connected to the furnace, the switching means being adapted for switching between the first connection configuration and the second connection configuration or from the second connection configuration; At least at any one of the transition times between the structures, the acid aqueous solution and the chlorine-based aqueous solution are in direct contact with each other in the supply path to the first mixer or the second mixer. In order to prevent moisture, a sterilizing water producing apparatus having a gas introduction valve for introducing gas into the supply passage is provided.

Further, in the present invention, as an apparatus for producing sterilized water in which an acid aqueous solution of hydrochloric acid or acetic acid, or a mixture thereof, and a chlorine-based aqueous solution of sodium hypochlorite or chlorine dioxide, or a mixture thereof are mixed with water and manufactured, And a first stock solution reservoir for storing the stock solution of the acidic aqueous solution, a second stock solution reservoir for storing the stock solution of the chlorine-based aqueous solution, and a channel formed in the flow path, and the acid aqueous solution or the chlorine-based aqueous solution in a portion of the flow path of the flow path. A first mixing unit for sucking and mixing any of the raw liquids, and a first mixing unit provided in the flow passage, for inhaling and mixing the stock solution of either the acid aqueous solution or the chlorine-based aqueous solution into another portion of the flow of the flow passage. 2 a feeder that supplies a feeder to which the stock solution of the acidic solution from the first stock solution reservoir is supplied to the first mixer; A first connection structure connected to the furnace, the supply passage to which the stock solution of the chlorine-based aqueous solution from the second stock solution reservoir is supplied, to a supply passage connected to the second mixer, and the above-mentioned first stock solution reservoir A supply path through which a stock solution of arithmetic solution is supplied to a supply path connected to the second mixer, and a supply path through which a stock solution of the chlorine-based aqueous solution from the second stock solution reservoir is supplied to the first mixer Switching means for switching a second connection structure connected to the furnace, and each of the acid aqueous solution and the chlorine-based aqueous solution from the first stock solution reservoir and the second stock solution reservoir to the first mixer and the second mixer; At least two flowmeters provided in the supply passage of the raw liquid, and the liquid portion having a predetermined volume communicating with the atmosphere by the passage and communicating with the supply passage, and the liquid level of the liquid flow portion at different liquid level At least two liquid level detection means for detecting the liquid level from each liquid supply path in accordance with the time between the liquid level detection means detecting the liquid level at the time of supply of the raw liquid from the liquid portion to the supply path. A flowmeter which detects the flow rate, and is switched either by the switching means from the first connection configuration to the second connection configuration, or from the second connection configuration to the first connection configuration. Sterilizing water which introduces outside air from the passage of the storage portion into at least a portion of a supply path between the acid aqueous solution and the chlorine-based aqueous solution so that the acid aqueous solution and the chlorine-based solution do not directly contact the storage portion of the flowmeter. A manufacturing apparatus is provided.

Here, chlorine gas is generated when the stock solution of the acid aqueous solution and the stock solution of the chlorine-based aqueous solution come into contact with each other. In order to prevent this, a gas such as air is temporarily introduced into the supply path when the first connection configuration and the second connection configuration are switched so that the acid solution and the raw solution of the chlorine-based aqueous solution do not directly contact each other. To this end, in some aspects of the present invention, a gas introduction valve is provided in the switching means or a flowmeter passage is used.

The present inventors earnestly examined using the property in which the above-mentioned crystal | crystallization which precipitates in the incorporator which mixes a chlorine-type aqueous solution with the acid aqueous solution easily in a sterilizing water production apparatus. On the other hand, the inventors of the present invention do not specify a substance constituting the crystal, but salts obtained by chemical reaction between a component of sodium hypochlorite and a component contained in raw water (for example, sodium carbonate, calcium carbonate, sodium chloride, or a mixture thereof). I guess this is not. By using the sterilizing water producing apparatus of the above structure, even if crystals are precipitated in the incorporation phase using sodium hypochlorite as the chlorine-based aqueous solution, the crystals are acidified by changing the incorporation phase in which the acidic aqueous solution and the chlorine-based aqueous solution are mixed into the water by the converter. Can be dissolved. Since the sterilizing water production apparatus of the present invention is configured to produce sterilizing water both as a first connecting structure and as a second connecting structure, for example, the sterilizing water is produced by the first connecting structure for a predetermined period of time, and then the second By the connection configuration, the operation for producing the sterilizing water can be repeated. As a result, precipitation of crystals can be avoided, and even if the user does not remove the crystals, the sterilizing water production apparatus can be operated to continue.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described with reference to drawings.

Embodiment 1

 BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram which shows each element and piping system of any embodiment of the sterilizing water production apparatus of this invention. This sterilizing water production apparatus 100 is an acid aqueous solution of hydrochloric acid or acetic acid, or a mixture thereof (hereinafter referred to as A solution), and a chlorine-based aqueous solution (hereinafter referred to as B solution) of sodium hypochlorite or chlorine dioxide, or a mixture thereof. Sterilized water is prepared by incorporating it into raw water.

Although this raw water is not specifically limited in this invention, Water from arbitrary water sources, such as tap water, a well, and a river, can be used. Hereinafter, in this embodiment, the case where tap water is used is illustrated.

The sterilizing water production apparatus 100 of the present embodiment is provided with a flow path 30 of water to which tap water is supplied. The flow path 30 includes a solenoid valve 32 for regulating the supply of tap water, a regulator 34 for adjusting the pressure of the tap water supplied, a check valve 36 for preventing back flow of water when the device is stopped, and the like. Is inserted. Thereafter, the water flow passage 30 is branched into two flow passages 30A and 30B through which water of the same quantity flows together.

The mixers 40A and 40B are inserted in each of the branched flow paths 30A and 30B. The mixers 40A and 40B are ejectors which suck and mix A liquid and B liquid using the flow rates of the water flows flowing through the flow paths 30A and 30B. In addition, in the flow paths 30A and 30B downstream of the mixing machines 40A and 40B, mixing blades 38A and 38B for stirring the water and the A and B liquids mixed therein to make the concentration uniform are provided therein. It is installed. These mixing blades 38A and 38B can be, for example, mixing blades using a hindered rod so as to generate a Kalman vortex and to be sufficiently uniform. In this way, a dilute acid solution and a dilute chlorine-based aqueous solution are prepared.

Thereafter, the flow paths 30A and 30B join again to form the flow path 30. In this flow path 30, the dilute acid aqueous solution and the dilute chlorine-based aqueous solution are mixed with each other. In this step, the dilute acid solution is made uniform enough so that there is no fluctuation in concentration, so that no chlorine gas is generated even when combined with the dilute chlorine-based aqueous solution. In this way, a predetermined chlorine-based aqueous solution is mixed in water of a predetermined acidity pH to produce a sterilizing water having a predetermined acidity and having high sterilizing power.

The produced sterilized water is accumulated in the sterilized water tank 48. The sterilizing water tank 48 is provided with an overflow tank 42. The flow path 30 extends to the position lower than the height (overflow level, 42h) which this overflow tank 42 overflows a liquid. The overflow tank 42 accumulates sterilizing water only up to the overflow level 42h, but the overflowed sterilizing water accumulates in the sterilizing water tank 48. The sterilized water accumulated in this way is taken out by the flow path 70 and used. The flow path 70 is provided with a pump 72 for supplying the sterilized water accumulated in the sterilizing water tank 48, and the pump 72 is installed downstream thereof, where the pressure therein becomes below a predetermined pressure. In this case, the operation is controlled by the pressure switch 74 which operates the pump 72. Thereby, the required amount of sterilizing water is supplied from the sterilizing water tank 48 by opening and closing of the tap (not shown) provided in the outlet 76 of the sterilizing water. The liquid level sensor 46 which detects the liquid level of sterilizing water is arrange | positioned inside the sterilizing water tank 48, and the solenoid valve 32 controls according to the quantity of the sterilizing water detected by this liquid level sensor 46. FIG. The predetermined sterilization water is controlled so as to always accumulate in the sterilization water tank 48.

Both the liquid A and liquid B supplied to the mixers 40A and 40B are replenished by the stock solution cartridges 12A and 12B. The stock solution cartridges 12A and 12B (stock solution tanks) have an airtight structure before replenishing the liquid A and the liquid B to the sterilizing water production apparatus 100, and the liquid A and the liquid B are accumulated therein. The structure of these stock solution cartridges 12A and 12B is shown in FIG. The stock solution cartridges 12A and 12B are made of a container portion 122 formed of a resin having sufficient chemical resistance (for example, a polyethylene resin) or the like, a screw cap 124 formed of a resin or the like, a silicone rubber sheet or the like. A packing 126 is formed by cutting a chemical resistant elastic resin plate in a circular shape. The container portion 122 has a cap attaching portion 122a having a male thread formed on an outer side thereof, and the cap attaching portion 122a is packed by a screw cap 124 having a female screw portion engaged therein. Blocked with 126). A through hole 124a is drilled in the center of the screw cap 124. The through hole 124a is blocked by the packing 126 before being mounted to the sterilizing water production apparatus 100. Although the center of the packing 126 is exposed to the outside through the through-hole 124a, the circumference | surroundings are fitted by the cap attaching part 122a of the container part 122, and the screw cap 124. As shown in FIG. In this way, the stock solution cartridges 12A, 12B are kept airtight so that the liquid A and the liquid B contained therein do not leak.

When the stock solution cartridges 12A and 12B are attached to the sterilizing water production apparatus 100, they are received from the bottom by the stock solution reservoirs 14A and 14B. The stock solution reservoirs 14A and 14B have an upper portion open to accommodate the screw caps 124 of the stock solution cartridges 12A and 12B, and a perforated bar 142 protruding upward is provided at the center of the bottom surface of the container. have. The perforated bar 142 is a round bar having a pointed upper end pointed to perforate the center of the packing 126 of the mounted stock cartridges 12A and 12B, and is perforated perpendicularly to the axis on the side thereof. The outlet hole 142a is drilled to penetrate the bar 142 itself. When the stock solution cartridges 12A, 12B are accommodated in the stock solution reservoirs 14A, 14B, the perforated rod 142 passes through the through holes 124a of the screw cap 124, breaks the packing 126, and drills the same. The tip reaches the inside of the stock solution cartridges 12A and 12B. The outflow hole 142a of the perforated rod 142 is an elongated hole extending upward and downward from the surface of the through hole yoke 124a, and A or B liquid in the stock solution cartridges 12A and 12B is the outflow hole. The air can be supplied into the stock solution cartridges 12A and 12B by flow out from the 142a or by the volume corresponding to the outflow.

Also shown in FIG. 2 is a liquid level 144 of the stock solution which flows out from the stock cartridges 12A, 12B to the stock solution reservoirs 14A, 14B. In the sterilizing water producing apparatus of the present embodiment, the liquid surface 144 is held at a height 14h in contact with the through hole 124a of the screw cap 124. This is because when the stock solution is consumed from the stock solution reservoirs 14A and 14B and the liquid level 144 is lower than this height, the supply of the stock solution and the volume of air through the outlet hole 142a and the through-hole 124a. When the supply is made and the liquid level 144 reaches this height, the supply is stopped.

1 again, the configuration of the sterilizing water production apparatus 100 will be described. The acid solution and the chlorine-based aqueous solution stored in the stock solution reservoirs 14A and 14B flow through the flow paths 16A and 16B and are supplied to the mixing apparatuses 40A and 40B. The flow paths 16A and 16B are provided with flow sensors 20A and 20B. The solenoid valve 17A, 17B is further inserted in the flow path 16A, 16B, for example, can be opened and closed simultaneously with the solenoid valve 32 according to the output from the liquid level sensor 46. FIG. In addition, the solenoid valves 17A and 17B can be closed to properly operate the flow sensors 20A and 20B.

The control circuits 200A and 200B calculate the flow rate by the output from the flow sensors 20A and 20B. Then, the control circuits 200A and 200B control the flow control valves 210A and 210B in accordance with the flow rates in the flow sensors 20A and 20B, so that the flow paths 16A and 16B to the mixers 40A and 40B. Adjust the flow rate of the stock solution. These flow control valves 210A and 210B control the amount of mixing per hour of the mixed acid aqueous solution and the chlorine-based aqueous solution by controlling the passage resistance of the flow paths 16A and 16B.

The structure of the flow sensor 20A, 20B used by this embodiment is shown in FIG. 3A is a side cross-sectional view of the flow sensors 20A and 20B. The flow sensors 20A and 20B have a liquid flow part 22 having a predetermined volume. This liquid flow part 22 communicates with the surrounding atmosphere by the opening part 22a of the passage. The atmospheric side opening part of this opening part 22a is maintained at height 20h. The flow path 28 connected to the supply port 28i and the outlet port 28o is provided in the bottom part of the liquid flow part 22. As shown in FIG. Through this flow path 28, the acid flow solution and the chlorine-based aqueous solution can enter and exit the liquid flow part 22. The liquid level 22h of the raw liquid in the liquid flow portion 22 rises when the solenoid valves 17A, 17B, and FIG. 1 are opened, and the raw liquid is supplied to the liquid flow portion 22, and the solenoid valves 17A, 17B are closed, and the mixing machine is closed. When the stock solution is supplied to the mixing apparatus 40A, 40B at 40A, 40B, it will fall. The side surface of the liquid flow part 22 is comprised by the transparent tube 22b. For this reason, whether or not the acid solution or the chlorine-based aqueous solution of the liquid flow portion 22 has reached a specific height is the light emitting element 24u and the light receiving element disposed on the liquid flow portion 22 so as to face each other through the transparent tube 22b. The light emitting element 24L and the light receiving element 26L disposed so as to face 26u or the liquid flow part 22 so as to face each other via the transparent tube 22b can be detected.

3B and 3C are cross-sectional views of the flow sensors 20A and 20B in a horizontal plane including a light emitting element and a light receiving element, and FIG. 3B shows a case where an acid solution or a chlorine-based aqueous solution in the liquid portion does not reach the horizontal plane. FIG. 3C Indicates the case where an acidic aqueous solution or a chlorine-based aqueous solution has reached. As shown in the figure, an optical path connecting the light emitting elements 24u and 24l and the light receiving elements 26u and 26l is disposed so as to deviate from the central axis of the transparent tube 22b which is a pipe on the far end surface. As a result, when there is no acid aqueous solution or chlorine-based aqueous solution, the light emitted from the light emitting elements 24u and 24l reaches the light receiving elements 26u and 26l in the optical path P 'which is almost straight (FIG. 3b). When the amount of light received by the elements 26u and 26l increases, the light emitting elements 24u and 24l in the optical path Pf refracted by the liquid in the transparent tube 22b when an acidic aqueous solution or a chlorine-based aqueous solution is present. The emitted light proceeds (Fig. 3C), and the amount of light received by the light receiving elements 26u and 26L decreases. Therefore, when the light-emitting elements 24u and 24L are turned on at a predetermined light amount and the light-receiving amounts of the light-receiving elements 26u and 26L are monitored, it is possible to determine whether or not the water surface has reached its height. On the other hand, in this embodiment, the optical path connecting the light emitting elements 24u and 24l and the light receiving elements 26u and 26l is disposed so as to deviate from the central axis of the transparent tube 22b so that the amount of light of the light receiving element is reduced in the refracted optical path Pf. However, even when the light receiving elements 26u and 26L are arranged in front of the refracted optical path Pf, the surface of the water can be detected by monitoring the amount of light.

Moreover, in this invention, arbitrary means which can detect a liquid level can be used.

The signal detected by the liquid flow section 22 at two different heights is input to the control circuits 200A and 200B. This control circuit incorporates a time measuring means thereinto measure the time between passage of the liquid level by two heights. Since the volume between these two heights in the liquid flow part 22 is fixed, the time is inversely proportional to the flow rate of the raw liquid supplied to the mixing apparatus 40A, 40B, and flow volume can be calculated | required easily. Since there is no movable part like the conventional rotary wing type in the structure of such a flowmeter, it is hard to be influenced by the bubble and a foreign material mixed in a stock solution, and it becomes possible to measure the micro flow which is stable with respect to a trace amount of flow.

In order to measure the flow rate by the flow sensors 20A and 20B, first, the solenoid valves 17A and 17B are opened to collect sufficient raw liquid in the liquid flow part 22 of the flow sensor, and the solenoid valves 17A and 17B are closed. The raw liquid is sent to the mixing machines 40A and 40B while the solenoid valves 17A and 17B are closed. At that time, when it is detected that a sufficient amount of the raw liquid is collected in the liquid flow portion 22 by the light receiving element 26u on the liquid flow portion 22, the solenoid valves 17A and 17B are closed to start time measurement. When it is detected that the raw liquid flows out from the liquid flow part 22 and the liquid level is lowered to the position by the light receiving element 26L at the lower part of the liquid flow part 22, the time measurement is stopped to determine the flow rate, and the solenoid valves 17A and 17B are used. ). Thereafter, the same operation is repeated.

In this embodiment, the height 14h of the stock solution reservoir 14 is maintained at the same height as the overflow level 42h, and the height 20h of the atmospheric opening of the flow sensors 20A and 20B is the stock solution storage. It is held at a position higher than the height 14h of the machine 14. In such a configuration, even when the sterilizing water production apparatus 100 is stopped, even if the solenoid valves 17A and 17B remain open without any operation, the acid solution and the chlorine system are passed through the mixing apparatuses 40A and 40B. The aqueous solution does not spill out. Further, even when the solenoid valves 17A and 17B are not closed due to any problem while the sterilizing water production apparatus 100 is in operation, it is possible to prevent the stock solution from being ejected from the opening of the flow sensor. Therefore, in these structures, it is possible to prevent the inadvertent consumption of the acidic aqueous solution and the chlorine-based aqueous solution when the solenoid valves 17A and 17B are open.

On the other hand, the overflow level 42h may be 5 to 15 mm higher than the height 14h of the stock solution reservoir 14.

Embodiment 2

Next, another embodiment of the present invention will be described. In the present embodiment, a sterilizing water production apparatus capable of producing sterilizing water by easily removing a crystal component (for example, sodium carbonate crystal) that precipitates in the mixing machine in a chlorine-based aqueous solution will be described.

4 is a block diagram of a portion of the sterilizing water producing apparatus 150 according to the present embodiment for supplying the stock solution to the mixing apparatus. In the present embodiment, when the sterilizing water is prepared using an acid aqueous solution and a chlorine-based aqueous solution, the same mixing as in the mixing apparatus 40A, 40B is used, using the same flow path as that of the water flow path 30 shown in FIG. Since group is used, these are abbreviate | omitted. In this embodiment, unlike the case of FIG. 1, the combination of undiluted | stock solution cartridge 12A, 12B and the mixing machine 40A, 40B is not limited. This combination is switched using the three-way valves 60A, 60B controlled by the control circuit 200 and the flow paths 56A, 56B, 58A, 58B connected thereto. This conversion leads the liquid A to the mixing machine 40A, the liquid B to the mixing machine 40B (first connection configuration), the liquid A to the mixing machine 40B, It is performed between the connection structure (2nd connection structure) leading to the mixing machine 40A. In addition, air valves 54A and 54B are provided in the flow paths 52A and 52B from the stock solution reservoirs 14A and 14B to the flow paths 56A, 56B, 58A and 58B. When the air valve is controlled by the control circuit 200 and turned to the air side, outside air can be introduced into the flow paths 52A and 52B. When the air valve is turned to the flow path side, the flow paths 52A and 52B are shut off from the outside air. Therefore, the control circuit 200, the three-way valves 60A, 60B, the flow paths 56A, 56B, 58A, 58B, and the air valves 54A, 54B function as switching means. On the other hand, in the flow sensor 20 ', an input path for supplying the raw liquid is provided at the upper portion of the liquid flow section 22, whereby the introduction of air when the air valves 54A and 54B are at the atmospheric side is prevented. It becomes easy.

In this sterilizing water producing apparatus 150, as shown in the drawing, the three-way valves 60A and 60B are controlled to connect the X side to the output. As a result, the liquid A from the stock solution reservoir 14A is delivered to the flow path 16A, and the liquid B from the stock solution reservoir 14B is delivered to the flow path 16B. This state is maintained for a predetermined period (for example, a week, etc.) during which the production of the sterilizing water is performed or stopped. Then, the changeover process is performed after the elapse of that period.

In the switching process, the control circuit 200 first opens the solenoid valves 17A and 17B, and the air valves 54A and 54B are switched to the air side, so that sterilized water is produced as it is. Thereby, the path from the air valve to the flow sensor 20 'is replaced by air using the liquid flow part 22 of the flow sensor 20'. Finally, when the stock solution is discharged by air to the liquid flow part 22 and the flow control valves 210A and 210B of the flow sensor 20 ', the three-way valves 60A and 60B are switched to the left side. The air valves 54A and 54B are returned to the flow path side. Then, B liquid flows through the flow path 16A, and A liquid flows through the flow path 16B. If the liquid level is monitored by the sensor of the flow sensor 20 ', since the raw liquid after switching reaches the liquid flow part 22, it operates like it before switching.

By this switching operation, the acid aqueous solution is led to the mixing device 40B to which the chlorine-based aqueous solution has been guided up to that point, and even if the crystal precipitates in the mixing device 40B, it dissolves and no influence due to precipitation of the crystal is eliminated. In this way, precipitation of such a crystal can be prevented even if the user does not particularly perform a cleaning process. On the other hand, since it is possible to manufacture the sterilizing water while this switching is performed, the use can be continued as it is, and after the predetermined period has elapsed, the same switching processing can be performed to return to the original connection configuration.

This invention can also be implemented by embodiment which further modified Embodiment 2. As shown in FIG. FIG. 5: is a block diagram which shows the structure of the part which supplies a raw liquid to a mixing apparatus in the sterilizing water manufacturing apparatus 160 of this modification. In this modification, air is introduced using the openings 22a of the flow sensors 20A and 20B. In this case, it becomes a structure which does not use the air valve 54A, 54B in the structure of FIG. 4, and the flow sensor 20 is set as the structure which supplies a raw liquid from a lower part, and flows out.

In the switching process in this modification, first, the solenoid valves 17A and 17B are closed together, and then the raw liquid is sufficiently removed from the reservoir 22 of the flow sensors 20A and 20B, and then the three-way valve 60A, Switch to 60B). And the solenoid valve 17A, 17B is opened, and manufacture of sterilization water is restarted. At this time, between the three-way valves 60A and 60B to the solenoid valves 17A and 17B in the flow paths 16A and 16B, the stock solution before switching remains and immediately after switching the three-way valves 60A and 60B to another type of stock solution. Although they are in contact with each other, in practice, the remaining stock solution can be reduced to a substantially trouble-free level by making this portion sufficiently short, so even this configuration is practical enough.

6 shows another modified example of the portion for supplying the stock solution in the sterilizing water producing apparatus 170 of this modified example. Also in this example, the switching is performed using the opening 22a of the flow sensor 20, and the four three-way valves 64A, 64B, 66A, 66B are connected in parallel with the flow paths 62A, 68B. And flow paths 68A and 62B connected to each other can be used. In this example, the switching process first closes the solenoid valves 17A and 17B. Next, after the stock solution of the liquid flow part 22 of the flow sensors 20A and 20B is sufficiently drained, and the three-way valves 64A, 64B, 66A, and 66B are also switched by air, the solenoid valves 17A and 17B. ) And resume production of sterilized water. In this configuration, the raw liquids do not directly contact any of the flow passages 16A, 16B, 68A, and 68B, as well as the liquid flow section 22, and switching is appropriately performed.

As mentioned above, although embodiment of this invention was described, this invention is not limited to embodiment mentioned above, Various deformation | transformation, a change, and a combination are possible based on the technical idea of this invention. For example, in the above-described embodiment, an example is described in which the sterilized water is supplied to the overflow tank after the sterilization water is produced. However, in the present invention, for example, immediately after the mixing blade, separate over the dilute acid solution and the dilute chlorine-based aqueous solution. By using a flow tank, the structure may be such that the dilute acid aqueous solution and the dilute chlorine-based aqueous solution are accumulated in separate tanks, and then they are mixed with each other to produce sterilized water.

In one embodiment of the present invention, since the liquid level of the overflow tank and the liquid reservoir of the stock solution reservoir are aligned, even when the sterilizing water production apparatus is stopped, the stock solution can be prevented from continuing to flow out through the mixing device.

In addition, in another aspect of the present invention, it is possible to prevent a large amount of water from flowing into the raw water side through the mixing device when the apparatus is stopped.

In still another aspect of the present invention, precipitation of crystals can be avoided, and the sterilizing water production apparatus can be operated even if the user does not remove the crystals.

Claims (5)

An apparatus for producing sterile water prepared by incorporating an aqueous solution of hydrochloric acid or acetic acid, or a mixture thereof, and a chlorine-based aqueous solution of sodium hypochlorite or chlorine dioxide, or a mixture thereof into water, With euros of water, A stock solution reservoir for storing a stock solution of an aqueous solution of an aqueous solution or a chlorine-based solution and maintaining the liquid level of the stock solution stored at a predetermined height; A mixing unit which is installed in a flow path and which sucks and mixes the stock solution supplied from the stock solution reservoir with water; The stock solution of at least one of an aqueous solution or a chlorine-based aqueous solution overflows the water mixed by the mixing device at the predetermined height, and exits the outlet of the flow path downstream of the mixing device in the flow of water. Sterilizing water production apparatus characterized in that it comprises an overflow tank to accommodate at a position lower than the height. The method of claim 1, The stock solution reservoir is configured to receive a stock solution tank having a downwardly directed opening through which the stock solution flows out, and having a gas tight structure other than the opening from below the opening. When the liquid level of the stock solution stored in the stock solution reservoir is lower than the predetermined height, at least one of the supply of the stock solution from the stock solution tank and the supply of air into the stock solution tank is possible through the opening. And the opening of the stock solution tank is blocked when at the predetermined height. An apparatus for producing sterile water prepared by incorporating an aqueous solution of hydrochloric acid or acetic acid, or a mixture thereof, and a chlorine-based aqueous solution of sodium hypochlorite or chlorine dioxide, or a mixture thereof into water, With euros of water, A mixing unit which is installed in the flow path and inhales and mixes the stock solution of an acid aqueous solution or a chlorine-based aqueous solution in water; An overflow tank for allowing the stock solution to overflow water mixed by the mixer at a predetermined height, and receiving an outlet of the flow path downstream of the mixer in a flow of water at a position lower than the predetermined height; A flow meter provided in the feed passage of the stock solution to the mixing device, the flow passage having a predetermined volume in communication with the atmosphere by the passage and at least two liquid level detections for detecting the liquid level of the flow passage at different liquid levels. Means, wherein the air opening of the passage is provided at a position higher than the predetermined height, and the liquid level detecting means detects the liquid level at the time of supply of the raw liquid from the liquid portion to the supply path. A sterilizing water production apparatus, comprising: a flow meter for detecting the flow rate of the stock solution in the supply passage. An apparatus for producing sterile water prepared by incorporating an aqueous solution of hydrochloric acid or acetic acid, or a mixture thereof, and a chlorine-based aqueous solution of sodium hypochlorite or chlorine dioxide, or a mixture thereof into water, With euros of water, A first stock solution reservoir for storing the stock solution of the aqueous solution; A second stock solution reservoir for storing the stock solution of the chlorine-based aqueous solution; A first mixing unit provided in the flow path, for sucking and mixing the stock solution of either the acid aqueous solution or the chlorine-based aqueous solution into a part of the water flow in the flow path; A second mixing unit which is provided in the flow path, for inhaling and mixing the stock solution of either the acid aqueous solution or the chlorine-based aqueous solution into another part of the flow of the flow path; A supply path for supplying the stock solution of the acid aqueous solution from the first stock solution reservoir to a supply path connected to the first mixer, and for supplying the stock solution of the chlorine-based aqueous solution from the second stock solution reservoir A first connection configuration for connecting a to a supply path connected to the second mixer and a supply path to which the stock solution of the acidic solution from the first stock solution reservoir is supplied to a supply path connected to the second mixer; And switching means for switching a second connection configuration for connecting a supply path to which the stock solution of the chlorine-based aqueous solution from the second stock solution reservoir is connected to a supply path connected to the first mixer, When the switching means is at least either at the time of switching between the first connection configuration and the second connection configuration, or at the time of switching between the second connection configuration and the first connection configuration, the arithmetic solution and And a gas introduction valve for introducing gas into the supply passage so that the chlorine-based aqueous solution does not directly contact the supply passage to the first mixer or the second mixer. An apparatus for producing sterile water prepared by incorporating an aqueous solution of hydrochloric acid or acetic acid, or a mixture thereof, and a chlorine-based aqueous solution of sodium hypochlorite or chlorine dioxide, or a mixture thereof into water, With euros of water, A first stock solution reservoir for storing the stock solution of the aqueous solution; A second stock solution reservoir for storing the stock solution of the chlorine-based aqueous solution; A first mixing unit which is provided in the flow path, for inhaling and mixing the stock solution of either the acid aqueous solution or the chlorine-based aqueous solution into a part of the flow of the flow path; A second mixing unit which is provided in the flow path, for inhaling and mixing the stock solution of either the acid aqueous solution or the chlorine-based aqueous solution into another part of the flow of the flow path; A supply path for supplying the stock solution of the acid aqueous solution from the first stock solution reservoir to a supply path connected to the first mixer, and for supplying the stock solution of the chlorine-based aqueous solution from the second stock solution reservoir A first connection configuration for connecting a to a supply path connected to the second mixer and a supply path to which the stock solution of the acidic solution from the first stock solution reservoir is supplied to a supply path connected to the second mixer; Switching means for switching a second connection configuration for connecting a supply path to which the stock solution of the chlorine-based aqueous solution from the second stock solution reservoir is supplied to a supply path connected to the first mixer; At least two flowmeters provided in the supply passages of the stock solutions of the acid aqueous solution and the chlorine-based aqueous solution from the first stock solution reservoir and the second stock solution reservoir to the first mixer and the second mixer; A liquid volume part having a predetermined volume in communication with the atmosphere and in communication with the supply path, and at least two liquid level detecting means for detecting the liquid level of the liquid part at a different liquid level, wherein the liquid from the liquid part to the supply path is provided. And a flowmeter for detecting the flow rate of the stock solution in each of the supply passages according to the time between the liquid level detecting means detecting the liquid level at the time of supply, The acidic aqueous solution and the chlorine-based aqueous solution are either at the time of switching from the first connection configuration to the second connection configuration by the switching means, or at the time of switching from the second connection configuration to the first connection configuration. A sterilizing water producing apparatus, characterized in that outside air is introduced into at least a portion of a supply path between the acid aqueous solution and the chlorine-based aqueous solution so as not to be in direct contact with the storage part of the flow meter.

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