JPH09184690A - Cooling tower for air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To sterilize cooling water for an air conditioner periodically by releasing water soluble liquid germicide or the saturated water solution of it inside a controlled release medicine cartridge to the city water that flows through distributing water pipes in the supply of the city water to a cooling tower. SOLUTION: The city water that flows into the controlled release medicine cartridge 2, proceeds towards the closed edge at the central part, diffuses radially and flows toward the opening edge of the controlled release medicine cartridge 2 as a cylindrical flow along the wall of the circumference of it. In the process of it, the germicide solves into the city water and the city water becomes the saturated solution of the germicide. The germicide solution flows out through the porous film 2a that covers the opening end of the controlled release medicine cartridge 2 to the outside and is mixed with the city water flowing by. The city water that is mixed with the saturated solution of the germicide flows into the supply distribution pipes 1 at the down flow of the bulged part 1a and then flows into the cooling tower. As the result of it, the germicide is added to the cooling water for the air conditioner periodically and sterilizes it.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling tower for air conditioning.

[0002]

2. Description of the Related Art A cooling tower for air conditioning uses cooling water that has been used for air conditioning of buildings, etc., which has been warmed to bring it into contact with an air flow to partially evaporate it, and to use the heat of vaporization during evaporation to heat the remaining water. It is a device that cools the cooled cooling water and returns the cooled cooling water to the inside of a building or the like. Part of the warmed cooling water evaporates inside the air conditioning cooling tower and is released into the atmosphere.Therefore, a makeup water distribution pipe is attached to the cooling tower for air conditioning to supplement the cooling water released into the atmosphere. Therefore, when the water level of the cooling water after cooling that has accumulated at the bottom of the cooling tower for air conditioning drops, a drop in the water level is detected by the float valve, and tap water is supplied to the cooling tower for air conditioning through the distribution pipe for makeup water. It has become.

[0003]

Problems to be Solved by the Invention Legionella bacteria occurring in the cooling tower cause bronchitis, pneumonia, etc., which is a problem. The present invention has been made in view of the above problems, and an object thereof is to provide a cooling tower in which cooling water is regularly sterilized.

[0004]

In order to solve the above-mentioned problems, in the present invention, a make-up water distribution pipe, a cooling tower body to which the make-up water distribution pipe is connected, a water-soluble liquid germicide or a water-soluble disinfectant. Agent having a hard material container not filled with an air layer filled with a water-soluble bactericide and a saturated aqueous solution of the bactericide, a single opening formed in the hard material container, and a porous film covering the opening A sustained-release cartridge, wherein the drug sustained-release cartridge is attached to the makeup water distribution pipe with the opening communicating with the flow passage of the makeup water distribution pipe and the opening facing the upstream side of the passage. A cooling tower for air conditioning is provided.

In the cooling tower for air conditioning according to the present invention, when tap water is supplied to the cooling tower through the makeup water distribution pipe, a part of the tap water flowing through the makeup water distribution pipe is a drug sustained release cartridge. The wash water penetrates into the drug sustained-release cartridge through the single opening formed in the cartridge, and the water-soluble liquid disinfectant or the saturated aqueous solution of the water-soluble disinfectant in the drug sustained-release cartridge is discharged to the above single unit. The water is discharged into the tap water flowing through the water pipe through one opening. The opening of the drug sustained release cartridge is covered with a porous film,
Since there is no air whose volume changes due to pressure fluctuations in the drug sustained-release cartridge, and the drug sustained-release cartridge is formed of a hard material and does not deform even when external pressure is applied, the drug sustained-release cartridge contains a water-soluble liquid. The bactericidal agent or a saturated aqueous solution of a water-soluble bactericidal agent is stably released into the tap water flowing through the makeup water distribution pipe without being released excessively. The tap water to which the bactericide is added flows into the cooling tower for air conditioning through the distribution pipe for makeup water. As a result, the sterilizing agent is added to the cooling water for air conditioning at regular intervals, and the cooling water for air conditioning is regularly sterilized. Since a water-soluble liquid germicide or a saturated aqueous solution of a water-soluble germicide is stably released into tap water flowing through a distribution pipe for makeup water, if an air conditioning cooling tower according to the present invention is used, The circulation line can be sterilized for a long time.

In a preferred embodiment of the present invention, the drug sustained release cartridge is mounted outside the makeup water distribution pipe, and the vicinity of the opening of the drug sustained release cartridge is inserted into the makeup water distribution pipe. By mounting the drug sustained release cartridge on the outside of the makeup water distribution pipe, replacement of the drug sustained release cartridge becomes easy.

In a preferred embodiment of the present invention, the drug sustained-release cartridge is a cylindrical body having one end closed and the other end opened, and the drug sustained-release cartridge is disposed in a make-up water distribution pipe. There is a gap between the discharge cartridge and the surrounding wall of the makeup water distribution pipe. Disposing a medicine sustained release cartridge consisting of a cylinder with one end closed and the other end open in a makeup water distribution pipe, and forming a gap between the medicine sustained release cartridge and the surrounding wall of the makeup water distribution pipe. As a result, the medicine sustained release cartridge is protected by the makeup water distribution pipe, and an accident such as damage to the medicine sustained release cartridge due to external force is prevented.

In a preferred embodiment of the present invention, the cooling tower for air conditioning is provided with a water amount adjusting device for adjusting the amount of water flowing into the medicine sustained release cartridge from the makeup water distribution pipe. By arranging a water amount adjusting device that adjusts the amount of water flowing from the makeup water distribution pipe to the drug sustained release cartridge,
It is possible to control the sustained release amount of the bactericide.

In a preferred embodiment of the present invention, the air conditioning cooling tower is equipped with a sterilizing agent leakage prevention device for preventing leakage of the sterilizing agent from the medicine sustained release cartridge when the air conditioning cooling tower is stopped. By installing a disinfectant leakage prevention device that prevents the disinfectant from leaking from the chemical release cartridge when the cooling tower for air conditioning is stopped, when the cooling tower for air conditioning is stopped, the disinfectant remains in the residual water in the distribution pipe for makeup water. Leakage and the occurrence of the situation where the bactericide is exhausted early are prevented.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An air conditioning cooling tower according to a first embodiment of the present invention will be described with reference to FIGS. FIG.
The cooling tower for air conditioning shown in (1) is provided with a distribution pipe 1 for makeup water. A bulging portion 1a is formed on the way of the makeup water distribution pipe 1. The drug sustained release cartridge 2 is attached to the bulging portion 1a.
Is installed. The upstream end of the makeup water distribution pipe 1 is connected to a water pipe. The downstream end of the water distribution pipe 1 is connected to the cooling tower body 3. Cooling tower body 3
Inside, a water sprinkler, a blower fan, a float valve, and the like, which are not shown, are arranged. Circulating water piping 4a, 4b for air conditioning equipment
Is connected to the cooling tower body 3. A pump 5 is arranged on the way of the circulating water pipe 4b.

The mounting state of the sustained drug release cartridge 2 will be described in detail with reference to FIG. The connection fitting 6 has a bulge portion 1a,
It is screwed to the downstream end of the makeup water distribution pipe 1 on the upstream side of the bulging portion 1a. A make-up water distribution pipe 1 on the downstream side of the bulging portion 1a extends from the bulging portion 1a. The air valve 7 is attached to the bulging portion 1a.
And a drain valve 8 are attached. It is made of a hard material such as acrylic resin, which is filled with a powder or granules of a germicide and a saturated aqueous solution of the germ, and has no compressible air inside, and has one end open and the open end being a porous membrane 2a. The covered cylindrical drug sustained-release cartridge 2 has a bulging portion 1a.
Is mounted on the outside of. The swinging lid 9 attached to the bulging portion 1a is pushed open and the portion near the open end of the drug sustained release cartridge 2 is inserted into the bulging portion 1a. The open end of the drug sustained release cartridge 2 faces the downstream end of the connection fitting 6.

The operation of the air conditioning cooling tower according to this embodiment will be described. In the cooling tower for air conditioning according to the present embodiment, the cooling water that has been used for air conditioning of a building and the like and has been warmed flows into the cooling tower body 3 through the circulating water pipe 4a. The warmed cooling water that has flowed into the cooling tower body 3 is sprinkled by a sprinkler (not shown), comes into contact with an air flow blown by a blower fan (not shown), and a part thereof is evaporated. The heat of vaporization is taken from the remaining portion of the sprinkled cooling water, and the remaining cooling water is cooled. The cooling water having the lowered temperature collects at the bottom of the cooling tower body 3. The low-temperature cooling water accumulated at the bottom of the cooling tower body 3 is sucked by the pump 5 and flows back into the building or the like through the circulating water pipe 4b. Since a part of the heated cooling water is evaporated in the cooling tower body 3 and released into the atmosphere, the water level of the low-temperature cooling water accumulated at the bottom of the cooling tower body 3 decreases with the passage of time. When the water level of the low-temperature cooling water accumulated at the bottom of the cooling tower body 3 drops, a float valve (not shown) detects the water level drop, and tap water is supplied to the cooling tower body 3 through the makeup water distribution pipe 1. Makeup water distribution pipe 1
When the tap water flows through, the part of the tap water flowing in the bulging portion 1a flows into the drug sustained release cartridge 2 through the central portion of the porous membrane 2a, and the remaining part is the drug sustained release cartridge 2
Flow pipe 1 for make-up water flowing downstream of the bulging portion 1a
Flow into.

The tap water flowing into the drug sustained release cartridge 2 diffuses in the radial direction while advancing through the central portion of the drug sustained release cartridge 2 toward the closed end, as indicated by the broken line arrow in FIG. To change to a cylindrical flow along the surrounding wall of the drug sustained-release cartridge 2 and proceed toward the open end of the drug sustained-release cartridge 2. The disinfectant is dissolved in tap water, and the tap water becomes a saturated aqueous solution of the disinfectant. The saturated aqueous solution of the bactericide flows out of the drug sustained release cartridge 2 from the periphery of the porous membrane 2a covering the open end of the drug sustained release cartridge 2 and mixes with tap water flowing around the drug sustained release cartridge 2. Tap water mixed with a saturated aqueous solution of a bactericide flows into the makeup water distribution pipe 1 downstream of the bulging portion 1 and then into the cooling tower body 3. As a result, the sterilizing agent is added to the cooling water for air conditioning at regular intervals, and the cooling water for air conditioning is regularly sterilized.

Since the open end of the drug sustained release cartridge 2 is covered with the porous membrane 2a, a part of tap water flowing through the bulging portion 1a gradually flows into the drug sustained release cartridge 2. As a result, the flow of tap water and the bactericide saturated aqueous solution in the drug sustained release cartridge 2 is stabilized. Since there is no air whose volume changes due to pressure fluctuation in the drug sustained release cartridge 2, the flow of tap water and the bactericide saturated aqueous solution in the drug sustained release cartridge 2 becomes stable. Since the drug sustained-release cartridge 2 is made of a hard material and is not deformed due to the difference in internal and external pressures, the flow of tap water and the bactericide saturated aqueous solution in the drug sustained-release cartridge 2 is stable. As a result, the saturated aqueous bactericide solution in the drug sustained-release cartridge 2 is stably and slowly released without being excessively released into the tap water flowing through the bulging portion 1a. The bactericide in the drug sustained release cartridge 2 is stably bulged out 1a
Since the water is gradually released into the tap water flowing through, the circulation line of the air conditioning equipment can be sterilized for a long time by using the cooling tower for air conditioning according to the present embodiment.

The connecting member 6 is rotated to move the connecting member in the axial direction, and the distance between the open end of the drug sustained release cartridge 2 and the downstream end of the connecting member 6 is adjusted to adjust the porous membrane 2a.
By adjusting the water pressure distribution in the vicinity, the amount of tap water flowing into the drug sustained release cartridge 2 can be adjusted. This makes it possible to control the sustained release amount of the bactericide saturated aqueous solution and control the bactericidal power of tap water to which the bactericide is added. Drug sustained release cartridge 2
When is pulled out from the bulging portion 1a by a predetermined distance, the swing lid 9 pushed and opened by the medicine sustained-release cartridge 2 swings to the position shown by the alternate long and short dash line in FIG. Close. Therefore, the medicine sustained-release cartridge 2 is pulled out from the bulging portion 1a for a predetermined distance, the open end of the medicine sustained-release cartridge 2 is closed, and tap water containing no germicide is supplied to the cooling tower body 3 as makeup water. You can also

When a cooling tower for air conditioning is used and tap water is flowing through the bulging portion 1a, the air valve 7 and the drain valve 8 are closed by the water pressure in the bulging portion 1a. When the cooling tower for air conditioning is not used and the flow of washing water in the bulging portion 1a is stopped, the water pressure in the bulging portion 1a decreases, the air valve 7 and the drain valve 8 are opened, and the bulging portion is opened. The washing water in 1a is discharged to the outside through the drain valve 8. As a result,
When the cooling tower for air conditioning is not in use, it is possible to prevent the situation where the saturated aqueous solution of the sterilizing agent leaks into the residual water in the bulging portion 1a and the sterilizing agent in the drug sustained-release cartridge 2 is exhausted early. It

Since the drug sustained-release cartridge 2 is mounted on the outside of the bulging portion 1a of the water distribution pipe 1, the drug sustained-release cartridge 2 can be easily replaced.

A drug sustained release performance test of the drug sustained release cartridge used in the present invention was conducted for the shower head with a drug sustained release cartridge shown in FIG. The structure of the shower head with the sustained drug release cartridge shown in FIG. 3 will be described. The shower head 21 with a sustained-release drug cartridge has a discharge port 22a formed of a perforated plate at the downstream end, a threaded portion 22b at the upstream end, and a channel 22c extending from the upstream end to the downstream end inside. A first portion 22 formed of a tubular body and a second portion 23 formed of a tubular body in which a threaded portion 23a is formed at the downstream end and a flow path 23b extending from the upstream end to the downstream end is formed inside. I have it. 2nd part 2
The flow passage 23b of No. 3 has a small diameter portion 23b extending from the upstream end.
₁ and the enlarged diameter portion 23b ₂ which is connected to the small diameter portion 23b ₁ and expands in a funnel shape toward the downstream end. A drain valve 24 is attached to the second portion 23. Second
In the portion 23, the screw portion 23 a is the screw portion 22 of the first portion 22.
It is connected to the first portion 22 while being screwed into b.
The upstream end of the second portion 23 is connected to the water supply hose 100.

A drug sustained release cartridge 25 is inserted in the flow path 22c of the first portion 22. The drug sustained release cartridge 25 is a container made of a hard material such as acrylic resin,
More specifically, it is composed of a straight cylindrical body 25a having one end closed and the other end completely open, and a porous membrane 25b covering the open end of the straight cylindrical body 25a. A plurality of protrusions 25c are formed on the outer surface of the straight cylindrical body 25a. The drug sustained-release cartridge 25 is filled with powder of ascorbic acid having a residual chlorine removing function and a saturated aqueous solution of ascorbic acid, and there is no compressible air in the drug sustained-release cartridge 25. In the manufacturing process of the drug sustained release cartridge 25, deaerated pure water is used, and the open end of the right cylindrical body 25a is covered with a porous film 25b while preventing air from being mixed.
Air can be completely excluded from the drug sustained-release cartridge 25 by covering with. In the sustained drug release cartridge 25, the open end covered with the porous film 25b is located in the expanded portion 23b ₂ of the flow path of the second portion 23 with the open end facing upstream, and the protrusion 25c constitutes the first portion 22. It is inserted into the flow path 22c of the first portion 22 while being in contact with the inner surface of the cylindrical body. Around the drug sustained release cartridge 25,
An annular flow path 22d is formed.

Shower head 2 with a drug sustained release cartridge
The operation of No. 1 will be described. Tap water is supplied from the water supply hose 100 to the shower head 21 with the medicine sustained release cartridge. As shown by the solid line arrow in FIG. 3, a part of the tap water flowing through the expanded diameter portion 23b ₂ of the flow path of the second portion 23 is part of the annular flow path 2
2d, and the other part flows into the drug sustained release cartridge 25 through the central portion of the open end of the right cylindrical body 25a. The tap water flowing into the drug sustained release cartridge 25 is
As shown by the broken line arrow in FIG. 3, while advancing through the central portion of the straight cylindrical body 25a toward the closed end, it diffuses in the radial direction, changes the flow direction, and forms a cylindrical flow along the surrounding wall of the straight cylindrical body 25a. Thus, the straight cylinder 25a advances toward the open end. Ascorbic acid dissolves in tap water, and tap water becomes a saturated aqueous solution of ascorbic acid. Ascorbic acid saturated aqueous solution,
From the periphery of the open end of the straight cylindrical body 25a, it flows out to the outside of the drug sustained release cartridge 25 and mixes with the tap water flowing into the annular flow path 22d. Ascorbic acid mixed in tap water removes residual chlorine in tap water. By discharging the tap water from which the chlorine odor has been removed from the shower head 21, the comfort of the shower user is increased.

Shower head 2 with sustained drug release cartridge
In No. 1, since the open end of the drug sustained release cartridge 25 is covered with the porous film 25b, the second portion 23
A part of the tap water flowing through the enlarged diameter portion 23b _{2 of the} channel gradually flows into the drug sustained release cartridge 25. As a result, the flow of tap water and the saturated ascorbic acid aqueous solution in the drug sustained release cartridge 25 is stabilized. Drug sustained release cartridge 25
Since there is no air whose volume changes due to pressure fluctuation, the flow of tap water and saturated ascorbic acid aqueous solution in the drug sustained release cartridge 25 is stabilized. Since the drug sustained-release cartridge 25 is made of a hard material and is not deformed due to an internal / external pressure difference, the flow of tap water and the saturated ascorbic acid aqueous solution in the drug sustained-release cartridge 25 is stable. As a result, the saturated ascorbic acid aqueous solution in the drug sustained-release cartridge 25 is stably released into the tap water flowing into the annular flow path 22d without being excessively released during the use of the shower.

Since the sustained drug release cartridge 25 is a cylindrical body having one end closed and the other end open, it can be easily inserted into the flow path 22c of the shower head 21 with a sustained drug release cartridge. In the shower head 21 with the drug sustained release cartridge, the drug sustained release cartridge 25 is the shower head 21.
Since it is provided in the flow path 22c, the medicine sustained release cartridge 25 is protected by the shower head 21 and an accident such as damage of the medicine sustained release cartridge 25 due to an external force is prevented.

Shower head 2 with sustained drug release cartridge
In No. 1, since the opening area of the open end of the drug sustained release cartridge 25 is sufficiently large, the flow path 23b ₂ in the opening is large.
A portion of water passes flowing into sustained drug release cartridge 25 from, the drug sustained-release cartridge 25 from the flow path 23b ₂
The part where the saturated aqueous solution of ascorbic acid released to the passage does not overlap. As a result, the drug sustained release cartridge 2
The liquid flow in 5 is stable, and the drug sustained release cartridge 25
The saturated aqueous solution of ascorbic acid therein is released slowly and stably.

Shower head 2 with a drug sustained release cartridge
In No. 1, by adjusting the screwing angle between the first portion 22 and the second portion 23, the distance between the downstream end of the small diameter passage 23b ₁ and the open end of the drug sustained release cartridge 25 is adjusted, By adjusting the water pressure distribution in the vicinity of the porous film 25b, the amount of tap water flowing into the drug sustained release cartridge 25 can be adjusted. Thereby, the sustained release amount of the saturated ascorbic acid aqueous solution can be controlled. The tap water flowing into the annular flow path 22d smoothly flows along the surrounding wall of the diameter-expanding flow path 23b ₂ , so that the flow of tap water is not disturbed near the open end of the sustained drug release cartridge 25. As a result, the saturated ascorbic acid aqueous solution in the drug sustained-release cartridge 25 is stably and slowly released.

Shower head 2 with sustained drug release cartridge
1, the water drain valve 24, which is closed by the water pressure in the shower head during use of the shower, is opened after the shower is used, and the flow channels 22c, 2
The water in 2d, 23b ₂ and 23b ₁ can be discharged to the outside. As a result, it is possible to prevent the situation where ascorbic acid is eluted into the residual water in the shower head 21 when the shower is not used and the ascorbic acid in the drug sustained release cartridge 25 is exhausted early.

Using a general-purpose fluid analysis program by the difference method, the fluid flow in the shower head was analyzed under the following conditions. Fluid: H ₂ O (density ρ = 992.3 Kg / m ³ , kinematic viscosity coefficient ν =
0.667 × 10 ^-6 m ² / sec) Flow rate: 0.167 × 10 ^-3 m ³ / sec Resistance due to porous membrane: 5.5 × 10 ^-3 m / sec (at △
p = 9.8 × 10 ² Pa) Analysis condition: No slip condition Drug sustained release cartridge outer diameter: 18mm Drug sustained release cartridge inner diameter: 16mm Drug sustained release cartridge length: 100mm Shower head inner diameter: 22mm Shower head length: 300mm Drug sustained release cartridge Arrangement position: The open end was arranged at the central portion in the length direction of the shower head, coaxially with the shower head, with the open end facing the upstream side.

FIG. 4 shows the contour lines and the velocity vector distribution of the hydraulic pressure distribution of the fluid in the vicinity of the open end of the drug sustained release cartridge 20 seconds after the start of water flow obtained by the analysis. From FIG. 4, in the central portion of the open end of the drug sustained release cartridge, the water pressure applied to the outer surface of the porous membrane is the water pressure applied to the inner surface of the porous membrane,
That is, the water pressure applied to the outer surface of the porous membrane is smaller than the water pressure applied to the inner surface of the porous membrane at the peripheral portion of the open end of the drug sustained release cartridge. At the center of the open end of the sustained-release cartridge, water flows from the showerhead channel into the drug sustained-release cartridge, and at the peripheral edge of the open-end of the sustained-release cartridge, water flows from the sustained-release cartridge to the showerhead channel. Is confirmed to be leaked.

At a position 2 mm away from the inner surface of the porous membrane of the drug sustained release cartridge to the inside of the drug sustained release cartridge,
And 0.2 in the radial direction from the center line of the drug sustained release cartridge.
Position 5 mm apart (A), position 2.75 mm apart (B), position 5.25 mm apart (C), 7.75 mm
FIG. 5 shows the change over time in the axial velocity component of the fluid (the downstream direction is positive and the upstream direction is negative) at the distant position (D). From FIG. 5, it can be seen that the flow of water flowing into the drug sustained release cartridge and the flow of water flowing out of the drug sustained release cartridge reach a steady state within a short time after the start of water flow, that is, from the drug sustained release cartridge. Is confirmed to be stable and sustained release.

An experiment for measuring the residual chlorine removing ability in tap water was conducted by using the shower head 21 with a drug sustained release cartridge shown in FIG. The inner diameter of the grip portion of the shower head 21 with a sustained drug release cartridge, that is, the outer diameter of the annular flow path 22d is set to 24 mm, and the outer diameter × inner diameter × length of the right cylindrical body 25a constituting the sustained drug release cartridge 25 is 20 mm × 16.
It was set to mm × 120 mm. As the porous membrane 25b covering the open end of the right cylindrical body 25a, a porous membrane having a pore diameter of 10 μm, which is obtained by coating polyester fiber with a cellulose acetate resin, is used, which has a nominal fiber diameter of 2 μm and a nominal pore diameter of 4.3 to 4.7 μm.
Sandwiched with a woven fabric of m ultrafine polyester fibers was used. The drug sustained-release cartridge 25 was filled with 20 g of ascorbic acid powder and filled with deaerated pure water to completely remove air from the drug sustained-release cartridge 25. The shower head 21 with a drug sustained release cartridge contains residual chlorine at a concentration of 1.5 mg / dm ³ or more.
C. Tap water at a flow rate of 10 dm ³ / min and a water pressure of 0.4 kgf / cm ² at the time of passing 20 minutes per day, that is, 2
00 dm ³ water was passed. After the water flow was stopped, residual water in the shower head 21 was discharged through the water drain valve 4 and left for 24 hours or more. After that, the above-mentioned water flow, release of residual water, and standing were repeated. Water flow for 20 minutes, 1 minute after the start of water flow, 5
At 10 minutes, 10 minutes and 20 minutes, the residual chlorine removing ability of the shower head 21 with a sustained-release medicine cartridge (the residual chlorine concentration of tap water supplied to the shower head 21 with a sustained-release medicine cartridge and the sustained-release cartridge with a sustained-release cartridge) The difference from the residual chlorine concentration of the water discharged from the shower head 21) was measured. The measurement result is shown in FIG. From FIG. 6, approximately 1 mg / d
It can be seen that the residual chlorine removal capacity of m ³ is stably maintained in each of the water passages and is also stably maintained for a long period of time.

A drug sustained-release cartridge filled with ascorbic acid having an inflow port and an outflow port is mounted on a showerhead, and the inflow port and the outflow port of the drug sustained-release cartridge communicate with a flow path inside the showerhead. Using the commercially available shower head with sustained drug release function corresponding to FIG. 2 of JP-A-6-296902, a measurement experiment of residual chlorine removal ability in tap water was conducted. In the shower head with a sustained chemical release function, tap water containing residual chlorine at a concentration of 1.5 mg / dm ³ or more at 40 ° C was used, and the water flow rate was 10 dm ³ / min, and the water pressure during water flow was 0.4 kgf / cm ^2. Then, 20 minutes per day, that is, 200 dm ^{3 of} water was passed. After the water flow was stopped, it was left for 24 hours or more. After that, the above water flow and standing were repeated. The residual chlorine removing ability of the shower head with the sustained drug release function was measured at the time of 5 minutes, 10 minutes, and 20 minutes after the start of water passage in water passage for 20 minutes. The measurement result is shown in FIG. From FIG. 7, in the commercially available shower head with a sustained drug release function corresponding to FIG. 2 of JP-A-6-296902, in each water passage,
Ascorbic acid was excessively eluted immediately after the start of water flow, and the amount of ascorbic acid eluted was drastically decreased with the passage of water, that is, stable sustained release of ascorbic acid cannot be expected. . In the commercially available showerhead with a sustained drug release function, ascorbic acid is excessively eluted, so that the ascorbic acid in the sustained drug release cartridge is heavily consumed, and the life of the sustained drug release cartridge is short.

An experiment for measuring the residual chlorine removal ability in tap water was conducted using the shower head 21 with a sustained drug release cartridge shown in FIG. Shower head with sustained release cartridge 2
The inner diameter of the gripping portion of 1, that is, the outer diameter of the annular flow path 22d is 2
4 mm, and the outer diameter × inner diameter × length of the right cylindrical body 5a constituting the drug sustained release cartridge 25 is 20 mm × 16 mm × 1.
It was set to 20 mm. As shown in FIGS. 8 (a), (c), and (d), the angle of the open end of the straight cylindrical body 25a with respect to the axis of the straight cylindrical body 25a is variously changed, and the angle is a shower with a drug sustained release cartridge. The effect of the head 21 on the residual chlorine removing ability was examined. Further, as shown in FIG. 8B, when the open end of the straight cylindrical body 25a is directed to the downstream side, as shown in FIG.
As shown in (e), both ends of the right cylindrical body 25a are closed,
A measurement experiment of residual chlorine removal ability in tap water was also conducted when an opening was provided at the center in the extending direction. FIG.
In (a) to (d), a woven fabric of ultrafine polyester fibers having a nominal fiber diameter of 2 μm and a nominal pore diameter of 4.3 to 4.7 μm was used as the porous membrane 25b covering the open end of the right cylindrical body 25a. The opening in FIG. 8 (e) was also covered with a woven fabric of ultrafine polyester fibers having a nominal fiber diameter of 2 μm and a nominal pore diameter of 4.3 to 4.7 μm. Shower head with sustained release cartridge 2
1, tap water of 10 ° C to 14 ° C containing residual chlorine at a concentration of 1.5 mg / dm ³ or more, and a water pressure of 0.4 k when passing water
Water was passed through gf / cm ² at various flow rates, and the residual chlorine removing ability of the shower head 21 with the sustained-release cartridge for chemicals was measured.

The measurement results are shown in FIG. From FIG. 9, when the angle of the open end of the straight cylindrical body 25a with respect to the axis of the straight cylindrical body 25a is 45 °, 60 °, or 90 °, the drug is gradually released as the discharge flow rate increases. It can be seen that the residual chlorine removing ability of the shower head 21 with a cartridge increases, that is, the concentration of ascorbic acid in the discharged water increases. On the other hand, when the open end of the straight cylindrical body 25a is directed to the downstream side, it is found that ascorbic acid hardly elutes in the discharged water. When both ends of the straight cylindrical body 25a are closed and an opening is provided at the central portion in the extending direction, the ascorbic acid concentration in the discharged water increases as the discharge water flow rate increases, but the discharge water flow rate is 8 dm ^3. It can be seen that when the flow rate exceeds / minute, the ascorbic acid concentration in the discharged water decreases with an increase in the discharged water flow rate. Judging from FIG. 9, the right cylindrical body 25
The open end of a is directed to the upstream side, and the angle of the open end of the straight cylindrical body 25a with respect to the axis of the straight cylindrical body 25a is 30 °.
If it is ˜90 °, it is considered that the sustained release amount of ascorbic acid from the straight cylindrical body 25a increases and the ascorbic acid concentration in the discharged water increases as the shower discharge flow rate increases. That is, the open end of the straight cylindrical body 25a is directed to the upstream side, and the open end of the straight cylindrical body 25a is connected to the straight cylindrical body 2a.
By setting the angle to the axis of 5a in 30 ° to 90 °, typically in a comfortable range of 8dm ³ / min ~12dm ³ / min, which is a discharge flow rate, ascorbic acid concentration in the discharge water is reduced, chlorine odor It is considered that the occurrence of the situation where some water is discharged from the shower head is prevented.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments. In the embodiment of FIGS. 1 and 3, instead of mounting the drug sustained release cartridge 2 on the outer side of the bulging portion 1a, as in the shower head 21 with a drug sustained release cartridge of FIG. The drug sustained release cartridge 2 may be provided. The swollen portion 1a protects the drug sustained release cartridge 2 and
The occurrence of accidents such as damage to the product due to external force is prevented.
In order to facilitate the replacement work of the drug sustained release cartridge 2, it is desirable to attach a lid member to the bulging portion 1a.

In the embodiment shown in FIGS. 1 and 3, the air valve 7 and the water drain valve 8 are eliminated, and when the air-conditioning cooling tower is not used, the drug sustained release cartridge 2 is pulled out from the bulging portion 1a by a predetermined distance, and the drug sustained release cartridge is pulled out. The open end of 2 may be closed to prevent leakage of the germicide.

The bactericide to be filled in the drug sustained release cartridge 2 may be a water-soluble liquid or a water-soluble solid.

By appropriately selecting the membrane area, pore diameter, film thickness, material, pore density and the like of the porous membranes 2a and 25b, depending on the type of sterilizing agent, the flow rate of tap water in the distribution pipe for makeup water, etc.
The bactericide sustained release amount can be adjusted to a desired value, and the bactericide concentration in tap water can be adjusted to a desired value.

[0037]

In the cooling tower for air conditioning according to the present invention, when the tap water is supplied to the cooling tower through the distribution pipe for makeup water, a part of the tap water flowing through the distribution pipe for makeup water is treated with the chemical suspension. Wash water enters the drug sustained-release cartridge through a single opening formed in the drug-release cartridge, and the water-soluble liquid bactericide or saturated aqueous solution of the water-soluble bactericide in the drug sustained-release cartridge, Through the single opening, it is discharged into tap water flowing through a water pipe. The opening of the drug sustained release cartridge is covered with a porous film,
Since there is no air whose volume changes due to pressure fluctuations in the drug sustained-release cartridge, and the drug sustained-release cartridge is formed of a hard material and does not deform even when external pressure is applied, the drug sustained-release cartridge contains a water-soluble liquid. The bactericidal agent or a saturated aqueous solution of a water-soluble bactericidal agent is stably released into the tap water flowing through the makeup water distribution pipe without being released excessively. The tap water to which the bactericide is added flows into the cooling tower for air conditioning through the distribution pipe for makeup water. As a result, the sterilizing agent is added to the cooling water for air conditioning at regular intervals, and the cooling water for air conditioning is regularly sterilized. Since a water-soluble liquid germicide or a saturated aqueous solution of a water-soluble germicide is stably released into tap water flowing through a distribution pipe for makeup water, if an air conditioning cooling tower according to the present invention is used, The circulation line can be sterilized for a long time.

By mounting the drug sustained release cartridge on the outside of the makeup water distribution pipe, the drug sustained release cartridge can be easily replaced.

A medicine sustained-release cartridge, which is a cylindrical body having one end closed and the other end open, is arranged in the makeup water distribution pipe, and a gap is provided between the medicine sustained-release cartridge and the surrounding wall of the makeup water distribution pipe. By forming it, the medicine sustained-release cartridge is protected by the makeup water distribution pipe, and an accident such as damage to the medicine sustained-release cartridge due to external force is prevented.

By disposing a water amount adjusting device for adjusting the amount of water flowing into the medicine sustained-release cartridge from the makeup water distribution pipe, the sustained-release amount of the bactericide can be adjusted.

By disposing a disinfectant leakage preventive device for preventing the disinfectant from leaking out from the drug sustained-release cartridge when the cooling tower for air conditioning is stopped, when the cooling tower for air conditioning is stopped, residual water in the distribution pipe for makeup water It is possible to prevent the situation where the disinfectant leaks out and the disinfectant is exhausted early.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an air conditioning cooling tower according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the vicinity of the mounting portion, showing the mounting state of the drug sustained release cartridge of the cooling tower for air conditioning according to the embodiment of the present invention.

FIG. 3 is a cross-sectional view of a shower head with a drug sustained release cartridge, which is a target of a performance test of the drug sustained release cartridge.

FIG. 4 is obtained by a flow analysis of a fluid in a shower head using a general-purpose fluid analysis program by the difference method,
FIG. 6 is a diagram showing a pressure distribution and a flow velocity distribution of a fluid near the open end of the drug sustained release cartridge.

FIG. 5 is obtained by a flow analysis of a fluid in a shower head using a general-purpose fluid analysis program by the difference method,
It is a figure which shows the time-dependent change of the velocity of the fluid in the some radial direction position in the open end of a medicine sustained release cartridge.

FIG. 6 is a diagram showing the residual chlorine removal capability of the shower head with a sustained-release drug cartridge of FIG.

FIG. 7 is a diagram showing the residual chlorine removal capability of a shower head with a sustained-release drug cartridge according to the prior art.

8 is a vertical cross-sectional view of a sustained drug release cartridge showing various forms of a sustained drug release cartridge included in the shower head with a sustained drug release cartridge of FIG.

FIG. 9 is a diagram showing the influence of the difference in the form of the drug sustained release cartridge on the residual chlorine removing ability of the shower head with the drug sustained release cartridge of FIG. 3.

[Explanation of symbols]

 1 Water distribution pipe for makeup water 1a Bulging part 2 Drug sustained release cartridge 2a Porous membrane 3 Cooling tower body 4a, 4b Circulating water piping 5 Pump 6 Connection fitting 7 Air valve 8 Drain valve 9 Swing lid 21 Shower with drug sustained release cartridge Head 22 First part 23 Second part 24 Drain valve 25 Drug sustained release cartridge 25b Porous membrane

Claims (5)

[Claims] 1. A makeup water distribution pipe, a cooling tower main body to which the makeup water distribution pipe is connected, a water-soluble liquid germicide or an air filled with a water-soluble germicide and a saturated aqueous solution of the germicide. A drug sustained release cartridge having a layer-free hard material container, a single opening formed in the hard material container, and a porous membrane covering the opening is provided, and the drug sustained release cartridge fills the opening with makeup water. An air conditioning cooling tower, wherein the cooling water supply pipe is attached to a makeup water distribution pipe in a state of being connected to the flow passage of the water distribution pipe and directing the opening toward the upstream side of the flow passage. 2. The medicine sustained release cartridge is mounted on the outside of the makeup water distribution pipe, and the vicinity of the opening of the medicine sustained release cartridge is inserted into the makeup water distribution pipe. Cooling tower for air conditioning. 3. The drug sustained-release cartridge is a cylinder body having one end closed and the other end open, and the drug sustained-release cartridge is disposed in a water supply pipe for makeup water. The cooling tower for air conditioning according to claim 1, wherein a gap is provided between the water distribution pipe and the surrounding wall. 4. The cooling tower for air conditioning according to claim 1, further comprising a water amount adjusting device that adjusts the amount of water flowing from the makeup water distribution pipe into the drug sustained release cartridge. 5. The disinfectant leakage prevention device for preventing leakage of the disinfectant from the drug sustained release cartridge when the cooling tower for air conditioning is stopped, according to any one of claims 1 to 4. Cooling tower for air conditioning.