JPH07289115A - Water tank - Google Patents

Abstract

PURPOSE:To prevent fishes from dying by maintaining clarifying performance by effectively proliferating microorganisms in a microorganism-culturing tank, removing a solid material accumulated in a cap formed at a discharge port of water tank by reverse wash by air at least one per day and carrying out normal operation. CONSTITUTION:This water tank is equipped with a water tank 1, a cap 3 formed at a discharge port 2 on the bottom of the water tank 1, a water- circulating circuit part consisting of a three-way pipe 5, a filter 6, a water pressure feed means 7, a microorganism-culturing tank 9 and the first air feed means 8 communicating with the microorganism-culturing tank 9, the second air feed means 14 communicating with either one of the three-way pipe 5 and a controlling means 16 for controlling the water-circulating circuit part and the second air feed means 14, and the second air feed means 14 is operated simultaneously with stop of the water pressure feed means 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to water in an aquarium for ornamental fish,
The present invention relates to an aquarium with a water purifying device that purifies dirt from water in a fish tank.

[0002]

2. Description of the Related Art A conventional water tank of this type is shown in FIG.
The purification module 19 and the purification module 19 are provided in the circulation passage through which the water in the water tank 17 is circulated by the water pressure feeding means 18.
An air supply means 20 is provided on the upstream side (for example, Japanese Patent Laid-Open No. 4-99429).

[0003]

However, in the above-mentioned configuration, solid matters such as fish dung, residual food, and aquatic plants are clogged in the drainage port, the flow rate is reduced, water circulation is stopped, etc.
There was a problem that the fish would die due to poor water purification.

The present invention is intended to solve the above-mentioned problems, and removes solid matter, such as fish droppings, residual food and aquatic plants, accumulated on a cap provided at a drainage outlet, by crushing by backwashing with air. The first purpose is to keep the fish alive by always operating normally.

The second purpose is to eliminate water turbidity caused by backwashing. A third purpose is to prevent solid matter from clogging the drain outlet and to facilitate backwash air from the cap.

[0006]

In order to achieve the above first object, the present invention provides a cap provided at a drainage port at the bottom of a water tank, a three-way pipe sequentially provided downstream of the drainage port, and a water pressure feeding means. And a water circulation circuit section comprising a microorganism culture tank and a first air supply means communicating with the microorganism culture tank, a second air supply means communicating with one of the three-way tubes, the water circulation circuit section and the second air supply means And a control means for controlling
The second air supply means is operated when the water pressure feeding means is stopped.

In order to achieve the second object of the present invention, the cycle for operating the second air supply means is at least once a day.

In order to achieve the third object of the present invention, the cap is composed of a perforated plate having a large number of holes having a diameter smaller than the opening cross-sectional area of the drainage port, and the upper surface of the cap is convex. is there.

[0009]

According to the above construction, the harmful substance in the water tank is sent from the drain port to the microorganism culture tank by the water pressure feeding means. The sent harmful substances enter the microorganism culture tank together with the air. The harmful substances that enter the microorganism culture tank are oxidatively decomposed and removed by the action of aerobic bacteria.

Solid matters such as fish dung, residual food, and water plants generated in the water tank are accumulated on the cap provided at the drainage port, and when the water pressure feeding means is stopped, the second air supply means is operated to reverse the air. It is finely crushed by washing and removed.

Backwashing is also performed at least once a day to reduce the amount of solids deposited on the cap.

Furthermore, since the cap is a perforated plate having a diameter smaller than the opening cross-sectional area of the drain port, and the shape of the upper surface is convex, the solid matter passing through the cap passes through the drain port and is filtered by the downstream filter. To be removed. In addition, since the backwashed air escapes without accumulating on the upper surface inside the cap, when the circulation pump is restarted, it sucks in the air and smoothly circulates the water without causing air trapping.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

1 to 3, 1 is a water tank, 2 is a drain port provided at the bottom of the water tank 1, and 3 is a cap provided on the drain port 2 and has a diameter smaller than the opening cross-sectional area of the drain port 2. It is made of a perforated plate having a large number of holes. 4 is a water purifier, 5
Is a three-way pipe provided downstream of the drain port 2, 6 is a filter,
The solid matter that has passed through the cap 3 provided in the drainage port 2 is removed. Reference numeral 7 is a circulation pump which is a water pressure feeding means, 8 is an ejector which is an air supply means, and a check valve 8a is attached to the air intake, so that even if the circulation pump 7 stops operating, the reverse flow of water from the air intake There is no. A microbial culture tank 9 in which a fixed bed of minerals is enclosed is provided downstream of the ejector 8, and a heating sterilization unit 12 having a heater 10 and an ultraviolet lamp 11 is disposed further downstream to form a water circulation circuit. .

A water leakage sensor 13 detects water leakage, and stops power transmission to the circulation pump 7 when water leakage is detected.
Reference numeral 14 denotes a DC power supply air pump that operates in conjunction with the stop of power transmission to the circulation pump 7, and is installed at the top of the water tank 1 and communicates with one of the three-way pipes 5. Reference numeral 15 is a solenoid valve that shuts off the water circulation circuit by stopping power transmission to the circulation pump 7, and 16 is a control means, which is the circulation pump 7, the heater 10, the ultraviolet lamp 11, the leak sensor 13, the air pump 14, and the solenoid valve 15.
Is connected.

Aerobic microorganisms are cultured in the microorganism culture tank 9. Saddle lock type ceramics made from granulated blast furnace is used as a fixed bed of microorganisms. This granulated blast furnace is produced by rapidly cooling slag generated from a steel mill at a rate of about 0.5 ton per 1.0 ton of molten iron, and is mainly used as a raw material for cement and a soil conditioner. Granulated blast furnace is a porous glassy material containing CaO, SiO ₂ , and Al ₂ O ₃ as main components, and also contains MgO, FeO and the like.

FIG. 2 is a control circuit diagram of the air pump 14. When the energization of the circulation pump 7 is stopped, the relay 17 is operated and the relay switch 17a is turned from the NO contact to the N contact.
Switching to the C contact side, the air pump 14 is operated.

3a to 3c are various sectional views showing an embodiment of the cap 3. As shown in FIG. In the above configuration, when the switch (not shown) of the control means 16 is turned on, the solenoid valve 15 is activated and brought into the open state, and the circulation pump 7 starts operating. The water in the water tank 1 is supplied from the drain port 2 to the solenoid valve 15, the filter 6, the circulation pump 7, the ejector 8, the microorganism culture tank 9,
Return to the water tank 1 through the heat sterilization unit 12.

In this circulatory system, the organic matter such as fish excrement and uneaten food in the aquarium 1, and the aquarium water containing ammonia and nitrite generated from the organic matter adhere to the surface of the fixed mineral bed from the beginning. The artificially cultivated aerobic microorganisms and their activating substances, and oxygen contained in the air sucked into the circulating water oxidize and decompose to nitrate. This oxidative decomposition reaction of ammonia into nitrate is represented by the following reaction formula.

[0020] ^{_{NH 4 + + 1.5O 2 → NO}} 2 - + H 2 O + H + ··· NO 2 - + 0.5O 2 → NO 3 ··· excrement and uneaten feed of fish this way, the water tank 1 The organic substances such as and ammonia generated from the organic substances are oxidized to nitrates and become harmless, and the water in the water tank 1 is purified.

Solid matter such as fish dung, residual food, and aquatic plants generated in the aquarium 1 gathers at the drainage port 2 due to the flow of water and is deposited on the cap 3 or flows out. Since the cap 3 is composed of a perforated plate having a diameter smaller than the opening cross-sectional area of the drainage port 2, solid matter that has slipped through the cap 3 is drained from the drainage port 2.
It is removed by the filter 6 provided downstream without clogging. The signal from the control means 16 stops the energization of the circulation pump 7 and interlocks the relay switch 17a to operate the air pump 14. At this time, the solenoid valve 15 is closed. Air enters from one side of the three-way pipe 5 and flows backward through the water circulation flow path and is sent out from the drainage path 2 into the water tank 1. At this time, the solid matter deposited on the cap 3 is removed while being crushed by air. Since this operation is performed at least once a day, the amount of solid matter deposited on the cap 3 is small, and the water does not become turbid due to backwashing. Also cap 3
The upper surface of the air pump 1 has a convex shape as shown in FIG.
After the stop of No. 4, no air accumulation occurs, and when the circulation pump 7 is operated, air is not sucked in to cause air trapping, and water circulation starts smoothly. The pulverized solid matter is removed by the filter 6 through the cap 3 and the drainage port 2 when the water circulation starts, and therefore the solid matter does not continue to accumulate on the cap 3 and the water flow is not alienated. Also, when power transmission to the circulation pump 7 is stopped due to a power failure or a signal from the water leakage sensor 13, the solenoid valve 15 is closed to shut off the water circuit, and the signal from the control means 16 operates the air pump 14. As a result, air is replenished into the aquarium 1, so that fish death due to oxygen deficiency can be prevented. Further, since it is aerated into the water tank, it also serves as a notification means for notifying the outside of the water circulation stop.

[0022]

As described above, according to the water purifying apparatus of the present invention, the following effects can be obtained. (1) The solid matter deposited on the cap provided at the drain port is removed by crushing by backwashing with air, so that the purifying performance can always be maintained without alienating the flow of water. (2) Since backwashing with air is performed at least once a day, the amount of solid matter deposited on the cap is small. Therefore, the turbidity of water caused by backwashing is almost eliminated and the appreciation effect is not impaired. (3) Since the cap is made of a perforated plate having a diameter smaller than the opening cross-sectional area of the drainage port, the drainage port is not clogged with solid matter that has slipped through the cap, and the top surface is convex. The backwashed air is easily released so that air is not caught when the circulation pump is started. (4) Even if an abnormal situation such as water leak or power failure occurs, the air pump operates to supply the air into the water tank, so that fish death due to oxygen deficiency can be prevented and the alarm means for notifying the abnormality to the outside Will also be.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of the configuration of a water purification device according to an embodiment of the present invention.

FIG. 2 is a control circuit diagram for controlling the air pump.

FIG. 3 is a cross-sectional view showing various configurations of a cap.

FIG. 4 is a sectional view of a conventional water purification device.

[Explanation of symbols]

 1 Water Tank 2 Drainage Port 3 Cap 5 Three-way Tube 6 Filter 7 Water Pressure Feeding Means 8 Air Supply Means 9 Microbial Culture Tank 14 Air Pump 16 Control Means

Front page continuation (72) Inventor Akihiko Nakajima 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (3)

[Claims] 1. A water tank, a cap provided at a drain port at the bottom of the water tank, a three-way pipe sequentially provided downstream of the drain port, a water pumping means, a microorganism culture tank, and a first communicating with the microorganism culture tank. A water circulation circuit unit including an air supply unit, a second air supply unit that communicates with one of the three-way pipes, and a control unit that controls the water circulation circuit unit and the second air supply unit. A water tank characterized in that the second air supply means is operated when the above is stopped. 2. The water tank according to claim 1, wherein the cycle for operating the second air supply means is at least once a day. 3. The water tank according to claim 1, wherein the cap is composed of a perforated plate having a large number of holes having a diameter smaller than the opening cross-sectional area of the drainage port, and the upper surface of the cap is convex.