JPH06261654A - Water cleaner - Google Patents

Abstract

PURPOSE:To provide a water cleaner which can keep a sufficient amount of oxygen dissolved in water and simultaneously make the water clean in the tank. CONSTITUTION:The water cleaner is comprised of an air-tightly closed water vessel 34 which is equipped with the inlet 21, the outlet 24 for circulating the fluid in the water tank 21 and an air exit 31 for air evacuation where an air- stone 29 is set inside the air-tight vessel 34, simultaneously a pressure-operating valve 35 is set to the outlet 31 so that the air is discharged by the pressure over a prescribed level. While the pressure-operating valve 35 is closed, the air pressure is increased in the air-tight tank 34 and the increase in dissolved oxygen can be expected. Since the pressure-operating valve 35 is made open when the air pressure is increased over a prescribed level, floating dirts on the surface of the water in the vessel 34 are discharged outside together with the air.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water purification device used for aquarium device for live fish, etc. for maintaining the freshness of fish, and particularly to obtain a sufficient amount of dissolved oxygen upon aeration. .

[0002]

2. Description of the Related Art When a large fishing boat or the like is used for fishing, the fish caught is temporarily stored in an aquarium of a live fish container provided on the boat and transported to a destination such as a landing site. At this time, an aquarium device is attached to the live fish container in order to maintain the freshness of the fish by cooling the seawater temperature of the aquarium to a temperature equivalent to the temperature of the seawater in which the fish lived.

For example, Japanese Utility Model Application No. 3 filed by the applicant of the present application
No. 7622 discloses, as a seawater cooling device for a small fishing boat, a water tank device in which seawater in a water tank is sucked and circulated while being cooled by an evaporator that constitutes a refrigeration cycle.

As shown in FIG. 3, this aquarium device for live fish containers comprises a seawater circulation system 4 in which the seawater in the aquarium 1 circulates, a coolant circulation system 9 in which a coolant such as CFC gas circulates, and this coolant circulation system 9. It has a cooling water circulation system 11 for cooling the refrigerant. The seawater circulation system 4 is configured by a closed circuit in which seawater in the water tank 1 is sucked by the pump 2, guided to the evaporator 3 of the refrigerant circulation system 9 for heat exchange, and then returned to the water tank 1. The refrigerant circulation system 9 is a closed circuit having the compressor 5, the condenser 6, the liquid tank 7, the expansion valve 8 and the evaporator 3 as its main components. This is done as follows.

First, the refrigerant sucked into the compressor 5 in the state of superheated vapor is adiabatically compressed by the compressor 5 to become a high-temperature and high-pressure gaseous refrigerant, which is guided to the condenser 6,
Here, heat is released to the outside to become a medium-temperature high-pressure liquid refrigerant.
Next, this liquid refrigerant is adiabatically expanded by passing through the expansion valve 8 to become a gas-liquid mixed refrigerant, and then guided to the evaporator 3 to perform heat exchange with the above-mentioned seawater, and to undergo isobaric expansion while being vaporized. Then, it becomes superheated steam and is sucked into the compressor 5 again. On the other hand, the cooling water is sucked into the condenser 6 of the refrigerant circulation system 9 by the pump 10 to control the cooling operation of the refrigerant described above.

[0006]

By the way, in order to maintain the freshness of caught fish, air is blown into the water tank, that is, aeration is performed, but conventional air supply is as shown in FIG. Air was blown directly into the water tank 1 from the air pump 12 through the air pipe 13.

However, since the depth is not sufficient in the live fish container, the aerated air floats on the surface of the water before it is dissolved in the water and is released into the atmosphere without being absorbed in the water. Since the amount of oxygen effective for breathing live fish is the amount of dissolved oxygen in water, the air released into the atmosphere ends up being wasted.

Further, when accommodating squid, there is a problem that aerated air enters the mantle and shortens the life of the squid. Even with other live fish, the aerated air adheres to the surface of gills and breathes. It may cause an obstacle or cause cloudiness in the fisheye.

Certainly, although aeration in the water tank can be expected to have the effect of floating the secretion liquid of the fish up to the liquid surface, it does not have an overflow mechanism like the interior water tank device because it only floats. The effect of water purification cannot be expected for the aquarium.

The present invention has been made in view of the above problems of the prior art, and is capable of maintaining a sufficient amount of dissolved oxygen in water and at the same time purifying water in a water tank. The purpose is to provide a device.

[0011]

In order to achieve the above object, the water purification apparatus of the present invention is a hermetically sealed apparatus having an inlet and an outlet through which a fluid in a water tank circulates, and an exhaust outlet for exhausting the internal air. It is characterized in that it is composed of a container, an aeration means is provided inside the closed container, and a pressure operation valve that opens at a predetermined pressure or more is provided at the exhaust port.

[0012]

The water in the aquarium containing live fish is sucked by the water circulation system, introduced to the inlet of the water purification apparatus, and the air aerated by the aeration means is dissolved. The water in which oxygen is dissolved returns to the water tank again through the water circulation system from the outlet.

Since air is aerated in the water purification apparatus attached to the water circulation system separately from the water tank as described above, air bubbles do not directly adhere to the live fish and the life of the live fish is not adversely affected. Further, by controlling the aeration in a small chamber such as the water purification device, it becomes easy to control the increase / decrease of the dissolved oxygen amount. In particular, while the pressure-operated valve is closed, the air pressure in the closed container rises, so an increase in the amount of dissolved oxygen can be expected.

In addition to this, when the pressure inside the closed container rises above a predetermined pressure, the pressure actuated valve opens, so that the dirt floating on the water surface in the closed container is discharged to the outside from the exhaust port together with the air. .

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a device configuration diagram showing a live fish tank device to which the water purification device of the present invention is applied, and FIG. 2 is a sectional view showing the water purification device shown in FIG.

As shown in FIG. 1, in the aquarium device for live fish of this embodiment, the water in the aquarium 21 is guided to a filter 26 to clean the water, and at the same time, it is guided to a cooling / sterilizing device 27 in the aquarium 21. It has a water circulation system 22 for simultaneously sterilizing the water. In the water circulation system 22, the water in the water tank 21 is sucked by the pump 28 operated by the motor, passes through the filter 26, passes through the cooling / sterilizing device 27, and is discharged into the water tank 1 again.

The filter 26 according to the present embodiment is one in which activated carbon for removing suspended matter or nitrate is enclosed for physical filtration,
Alternatively, the bacteria for ammonia decomposition may be encapsulated for biological filtration, and the physical filtration and biological filtration may be used in combination. In particular, when a filter for performing biological filtration is installed on the downstream side of the water purification device 25, which will be described later, as in this embodiment, water having a large amount of dissolved oxygen can be supplied to the filter, so that bacteria for ammonia decomposition can be supplied. This has the effect of promoting the decomposition action.

The cooling device of the cooling / sterilizing device 27 of this embodiment has, for example, a compressor, a condenser, an expansion valve, and an evaporator as its main components, and a closed circuit is constituted by a refrigerant pipe to cool a low-temperature refrigerant flowing through the evaporator. Water circulation system 22
Heat is taken from the water flowing inside to cool the water to a predetermined temperature. Here, the condenser removes heat from the high-temperature and high-pressure gaseous refrigerant to change its state to a medium-temperature and high-pressure liquid refrigerant, and heat is exchanged by a cooling fan or the outside air. In addition, a liquid tank is provided on the downstream side of the condenser to store the liquid refrigerant that is adjusted by the fluctuation of the heat load in the cooling cycle, to separate the gas-liquid separation and foreign matter and water in the refrigerant, and to take out only the liquid refrigerant. Is also good. The expansion valve connected to the downstream side of the liquid tank adiabatically expands the liquid refrigerant to produce a gas-liquid mixed refrigerant, and the evaporator inserts a titanium pipe inside the rubber hose and puts it in the titanium pipe. The refrigerant may flow, and the water in the water tank 21 may flow between the titanium pipe and the rubber hose.

The cooling / sterilizing device 27 configured as described above
The change of the state of the refrigerant and the cooling action of the water in the water tank in the cooling device are performed as follows. That is, first, the refrigerant sucked into the compressor in the state of superheated vapor is adiabatically compressed by the compressor to become a high temperature and high pressure gaseous refrigerant, which is guided to the condenser, where it releases heat to become a medium temperature and high pressure liquid refrigerant. Next, this liquid refrigerant is adiabatically expanded by passing through an expansion valve to become a gas-liquid mixed refrigerant, and then guided to an evaporator to perform heat exchange with the water in the water tank 21 and to undergo isobaric expansion while being vaporized. Then, it becomes superheated steam and is sucked into the compressor again. In addition, cooling / sterilization device 2
The sterilization device 7 uses a general sterilization lamp such as an ultraviolet lamp.

On the other hand, a water purification device 25 is attached to the water circulation system 22 of the live fish tank device of this embodiment.
In the embodiment shown in FIG. 1, the filter 26 is mounted on the upstream side, but the present invention is not limited to this embodiment.
It may be attached on the downstream side of 7. When the water purification device 25 is installed downstream of the cooling / sterilizing device 27, air is aerated to the cooled water, which has the effect of increasing the amount of dissolved oxygen.

The water purification device 25, as shown in FIG.
It has a closed container 34 including a bottomed cylindrical tank main body 32 having an exhaust port 31 whose upper surface is open to the atmosphere, and a lid 33 that closes openings other than the exhaust port 31 of the tank main body 32. The tank body 32 is provided with an inflow port 23 into which water from the water circulation system 22 flows, and an outflow port 24 for returning the water to the water circulation system 22. The inflow port 23 is opened at a position higher than the outflow port 24 in the vertical direction,
Further, in the water purification device 25, the inflow port 23 has the water surface H of the water tank 1.
It is installed slightly lower than the vertical direction. As a result, when the water in the water tank 21 flows into the water circulation system 22, the water level h of the water purification device 25 becomes higher than the inflow port 23.

In the closed container 34 of the water purification device 25,
Air stone (aeration means) 29 for blowing air
Is provided, and air is pumped from the air pump 30 to the air stone 29. The outlet 24 is preferably provided at a position below the tank body 32 so that the aerated air does not flow out from the outlet 24 and air can be accumulated in the closed container 34. Further, the air stone 29 is provided in the closed container 3 so that the aerated air does not flow out from the outlet 24.
4 is preferably attached to the stagnation part of the water flow, and is preferably provided at the bottom of the tank body 32 in order to enhance the solubility of air.

The exhaust port 31 is provided with a pressure actuating valve 35 which opens when the air pressure in the closed container 34 becomes higher than a predetermined pressure, and has a function of preventing an abnormal rise in the pressure in the closed container 34. In addition, dirt such as body fluid of fish floating on the surface of water in the closed container 34 is discharged together with air or water to the exhaust port 3
It controls the function of discharging from 1 to the outside.

The pressure for operating the pressure actuating valve 35 can be set to, for example, a gauge pressure of 1 kg / cm ² or the like. However, the set pressure can also be controlled depending on the relationship with the amount of water flowing in the closed container 34. it can.

For example, when the fish just caught is put into the water tank 21, the inside of the water tank is immediately polluted, so that the amount of water flowing to the water circulation system 22 is increased and at the same time the amount of air supplied to the air stone 29 is increased. It can be said that it is preferable that the operating interval of the pressure-operated valve 35 is shortened by also increasing the value of .alpha.

On the other hand, if purification is carried out for a long time, the contamination of water in the tank will be stabilized, so that the circulation amount of the water circulation system 22 is reduced and the amount of air supplied to the air stone 29 is also reduced. Alternatively, the operation interval of the pressure operated valve 35 is lengthened by decreasing only the amount of air supplied to the air stone 29 while the amount of circulation of the water circulation system 22 is increased.

Next, the operation of this embodiment will be described. The water in the aquarium 21 containing live fish is sucked by the pump 28 and guided to the water circulation system 22, and the water is introduced into the water inlet 23 of the water purification device 5.
I will guide you to. In the water purification device 25, the air pumped from the air pump 30 is aerated from the air stone 29 and dissolved in the water introduced into the water purification device 25.
The water in which oxygen is dissolved is guided from the outlet 24 to the filter 26, and foreign matter in the water is removed. After that, it is cooled to a predetermined temperature by the cooling / sterilizing device 27, the fungi in the water are sterilized, and the water is returned to the water tank 21 again.

As described above, the water circulation system 22 is provided separately from the water tank 21.
Since air is aerated in the airtight container of the water purification device 25 attached to, the live fish does not have bubbles directly attached thereto, and the life of the live fish is not adversely affected. Further, by performing aeration in a closed small chamber such as the water purification device 25, increase / decrease control of the dissolved oxygen amount becomes easy. In particular, while the pressure operated valve 35 is closed, the closed container 34
Since the internal air pressure rises, an increase in the amount of dissolved oxygen can be expected.

In addition to this, when the pressure in the closed container 34 rises above a predetermined pressure, the pressure actuated valve 35 opens, so that the dirt floating on the water surface in the closed container 34 due to aeration is collected together with air or water. It will be discharged to the outside from the exhaust port 31.

The embodiments described above are provided for facilitating the understanding of the present invention, but not for limiting the present invention. Therefore, each element disclosed in the above-described embodiments is intended to include all design changes and equivalents within the technical scope of the present invention.

For example, the aquarium device for live fish to which the water purification device of the present invention is applied is not limited to that shown in FIG. Further, if a germicidal lamp made of an ultraviolet lamp is installed in the closed container 34, bacteria contained in the water in the water tank 21 can be sterilized, and at the same time bacteria contained in the suctioned air can be sterilized. Oxygen O2 in the sucked air is changed to ozone O3, so that further sterilization effect can be expected by this ozone O3.

[0032]

As described above, according to the present invention, since air is aerated in a closed container, air bubbles do not directly adhere to live fish, and the life of live fish is not adversely affected. Further, by controlling the aeration in a small chamber such as the water purification device, it becomes easy to control the increase / decrease of the dissolved oxygen amount. In particular, while the pressure-operated valve is closed, the air pressure in the closed container rises, so an increase in the amount of dissolved oxygen can be expected.

In addition to this, when the pressure inside the closed container rises above a predetermined pressure, the pressure-operated valve opens, so that the filth floating on the water surface in the closed container due to aeration is discharged from the exhaust port to the outside together with the air. Will be discharged.

[Brief description of drawings]

FIG. 1 is a device configuration diagram showing an example of an aquarium device for live fish to which a water purification device of the present invention is applied.

FIG. 2 is a sectional view showing the water purification device shown in FIG.

FIG. 3 is a device configuration diagram showing a conventional live fish tank device.

[Explanation of symbols]

21 ... Water tank 22 ... Water circulation system 23 ... Inflow port 24 ... Outflow port 25 ... Water purification device 29 ... Air stone (aeration means) 31 ... Exhaust port 34 ... Closed container 35 ... Pressure actuated valve

Claims (1)

[Claims] 1. A closed container (34) having an inlet (23) and an outlet (24) through which a fluid in a water tank (21) circulates, and an exhaust port (31) for exhausting internal air, A water purification apparatus characterized in that an aeration means (29) is provided inside the airtight container (34), and a pressure operation valve (35) that opens at a predetermined pressure or more is provided at the exhaust port (31).