JPH05168372A - Filter unit of water tank for ornamental fish - Google Patents

Abstract

PURPOSE:To provide a quiet filter unit in which the sound generated by returning filtered water to a water tank is reduced. CONSTITUTION:This filter unit is equipped with a filtration chamber 7 for accommodating a filter medium 9 and with a float chamber 8 communicated to the bottom part of the filtration chamber 7. A short cylindrical hole 16 for allowing water to drop is attached to the bottom part of the float chamber 8. A vertically movable float 17 is set to the inside of the float chamber 8 so that it can clog the upper opening edge of the above-mentioned hole 16. A pipe 10 for returning water is connected to the lower opening part of the hole 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filtering device installed on an aquarium for aquarium fish to circulate and filter water in the aquarium.

[0002]

2. Description of the Related Art A conventional aquarium fish tank filtration device is provided with a drop port at the bottom of the filter tank, or a reflux pipe is connected to the drop port so that filtered water filtered by the filter tank can be discharged from the drop port. The structure is such that it is returned to the main body of the water tank directly or through a reflux pipe. Pumping pumps have different pumping capacity depending on the power supply voltage and frequency.
The pumping capacity also varies depending on the water level in the aquarium. When the pumping capacity of the pumping pump, that is, the amount of water entering the filter tank exceeds the amount of water returning from the filter tank to the water tank, it overflows. The diameter of the mouth and the reflux pipe is set larger than the diameter of the pumping pipe of the pump. Therefore, the drop port and the reflux pipe flow the filtered water with a flow capacity that is not originally provided.

[0003]

However, when filtered water flows down with the drop port or the reflux pipe having a flow capacity lower than that, air always exists in the drop port or the reflux pipe, and the filtered water flows down while sucking air. That is, a large sound of water is generated. For this reason, when the filtering device is operated in a quiet room, the water noise becomes noise, which disturbs sleep especially at night. In order to suppress the generation of water noise accompanying the flow of filtered water, it is conceivable to put coarse cotton in the drop port, but this will cause dust to be caught and cause clogging. It is also possible to put an inner pipe in the drop port, but this cannot cope with the change in water volume due to the decrease in the outflow area.

[0004]

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above, and has a filter tank disposed above the water tank body, and water in the water tank body pumped up by a pump is pumped in the filter tank. Of the ornamental fish tank in which the filtered water is passed through the filter medium to be filtered, and the filtered water is returned to the inside of the water tank main body through the reflux pipe. A float chamber is formed by communicating with each other, and a lower end opening is formed in the bottom of the float chamber so that a lower end communicates with the reflux pipe and an upper end is opened. A float that can be contacted is provided so as to be movable up and down.

[0005]

The float moves up and down according to the amount of filtered water flowing into the float chamber from the filtering chamber, thereby adjusting the amount of filtered water flowing into the drop port and preventing air from being sucked into the drop port.

[0006]

Embodiments of the present invention will now be described with reference to the drawings. The filtration device 1 has a base frame 4 placed on an upper frame 3 of a water tank body 2, a filtration tank 5 and a pumping pump 6 installed on the base frame 4, and a filtration chamber 7 is formed in the filtration tank 5. In addition, the float chamber 8 is formed, and the water in the water tank pumped up by the pump 6 is supplied to the filter medium 9 in the filter chamber 7 to be filtered, and the filtered water is flowed down in the reflux pipe 10 through the float chamber 8. It is a structure that allows it to be returned to the water tank.

In the filtration chamber 7, a sled 11 is laid at a position separated from the bottom surface, and the filtering material 9 is loaded on the sled 11.
A distribution gutter 12 is installed above the filter material 9 along the longitudinal direction of the filtration chamber 7, and the water discharged from the discharge nozzle 13 of the pumping pump 6 once flows into the distribution gutter 12 and is opened on the bottom surface. It is made to flow down uniformly over the whole area of the filter medium 9 from the large number of distribution holes 14 ... Then, the filtered water that has passed through the filter medium 9 and has been filtered flows into the float chamber 8 through the flow path 15 between the cage 11 and the bottom surface.

The float chamber 8 is formed on one side of the filtration tank 5, and as shown in FIG. 3, a short cylindrical drop port 16 is formed upward on the bottom surface and a float 17 is guided on the side surface. A plurality of rib-shaped guides 18 ... Are formed in the vertical direction and communicate with the flow path 15 below the cage 11 through the hole 19 at the bottom. It should be noted that the size of the drop port 16 is set in consideration of the pumping capacity of the pumping pump 6 so that it can flow down with a margin even in the state of the maximum discharge amount. And this drop port 16
A reflux pipe 10 is fitted in the lower end opening of the nozzle, and a nozzle 20 is formed at the lower end of the reflux pipe 10 to discharge the water laterally in a fan shape. The nozzle 20 is located at a position lower than the water surface in the water tank body 2. In other words, water is used in the water tank body 2 until the nozzle 20 is submerged.

The float 17 provided in the float chamber 8 is
It is a hollow closed box-shaped body having a knob 17 'on the upper surface,
A flat surface having a size and shape that can be freely moved up and down by being guided by the guides 18 and side surfaces in the float chamber 8 and the bottom surface being sufficiently wider than the opening edge so that the opening edge of the drop opening 16 can be closed. I am doing it. Further, the float 17 has a volume and self-weight capable of exerting a buoyancy force larger than the suction force of the water in the reflux pipe 10.

In the filtering device 1 having the above-mentioned structure, the water pump 6 is operated and the water discharged from the discharge nozzle 13 is supplied from the distribution holes 14 of the distribution gutter 12 onto the filter medium 9 in the filtration chamber 7. Then, the water is filtered while passing through the filter medium 9, and the filtered water passes through the cage 11 and flows down into the flow path 15 into the float chamber 8.

When the filtered water flows into the float chamber 8, the water level rises. When the water level becomes higher than the opening edge of the drop port 16, the lower part of the float 17 is submerged in the water, so that buoyancy is generated, and the buoyancy is increased by the further rise of the water level, and the weight and the buoyancy of the float 17 are increased. When they are equal to each other, the float 17 floats up, and as shown in FIG. 6, a gap 21 is formed between the lower surface of the float 17 and the opening edge of the drop port 16. Therefore, when the filtered water continues to flow from the flow path 15 into the float chamber 8 after that, the filtered water in the float chamber 8 flows into the drop port 16 through the gap 21, and the reflux pipe 1
0 is flowed down and returned from the nozzle 20 into the water tank body 2.

In this case, when the amount of filtered water flowing from the flow path 15 into the float chamber 8 further increases, the water level further rises, and the float 17 also rises accordingly and the gap 21 expands. Therefore, the amount of filtered water flowing from the float chamber 8 to the drop port 16 also increases, and the amount of filtered water flowing from the flow path 15 into the float chamber 8 and the amount of filtered water flowing from the float chamber 8 to the drop port 16 are increased. Are equal. In this state, the inside of the reflux pipe 10 flows down from the drop port 16 in a state where the filtered water is full, and
Since the float 17 exists immediately above, the air will not be entrained in the filtered water that flows back from the float chamber 8 into the water tank body 2. Therefore, no water noise is generated due to air.

On the other hand, when the amount of water supplied to the filtration tank 5 decreases due to aquatic plants being caught in the water intake port 22 of the pumping pump 6 or the voltage lowering, the amount of water passing through the filter medium 9 Also decreases and the amount of filtered water flowing into the float chamber 8 also decreases accordingly. In this way, when the amount of filtered water flowing into the float chamber 8 is reduced, the water level in the float chamber 8 is lowered, so the float 17 is also lowered, whereby the lower surface of the float 17 and the opening edge of the drop port 16 are separated. Gap 2
1 is also narrower. Therefore, also in this case, the amount of the filtered water flowing from the filter chamber 7 into the float chamber 8 and the amount of the filtered water flowing out from the float chamber 8 to the drop port 16 become equal to each other. It is possible to prevent air from being caught in the refluxed filtered water.

Further, when the amount of water supplied from the pumping pump 6 decreases and finally the supply is stopped, the water level in the float chamber 8 lowers and the float 17 descends, and finally the bottom surface of the float 17 is lowered. Comes into contact with the opening edge of the drop opening 16 to close the drop opening 16. In this way, the drop port 16 is float 1
When it is blocked by 7, the reflux of the filtered water is stopped, the water remains in the reflux pipe 10 as it is, and the water in the reflux pipe 10 draws the float 17 into the drop port 16.

However, if the pumping capacity of the pumping pump 6 is restored and the amount of water supplied to the filtration chamber 7 is increased by removing dust from the water suction port 22 or the like, the water level in the float chamber 8 rises.
Since the float 17 is set so as to generate a buoyancy larger than the suction force of the water in the reflux pipe 10, when the water level becomes higher than the drop port 16 to some extent, it floats against the suction force. Therefore, the drop port 16 closed by the float 17 is opened, and the filtered water in the float chamber 8 flows into the drop port 16 through the gap 21 formed between the float 17 and the drop port 16. After this, since the float 17 moves up and down and the gap 21 is adjusted according to the amount of filtered water flowing from the filtering chamber 7 into the float chamber 8, the filtered water is fed into the water tank body 2 in the same manner as in the above-described state. Can be gently refluxed to.

In the present embodiment, as shown in FIG. 4, when the overflow passage 23 is formed beside the float chamber 8 and the float 17 does not rise due to a trouble or the like, this overflow occurs. The filtered water overflows from the flow path 23 into the water tank body 2.

In the above embodiment, the entire circumference of the opening edge of the drop port 16 is closed by the lower surface of the float 17, so that the float 1
When the lower surface of 7 approaches the drop port 16, that is, when the gap 21 becomes narrow, the float 17 is sucked toward the drop port 16 by the force of the filtered water flowing from the drop port 16. Therefore, FIG.
As shown in, the notch portions 24, 24 may be formed in a part of the drop port 16 to weaken the suction force acting on the float 17.

[0018]

As described above, according to the present invention, the water supply amount from the pump and the outflow amount returned to the water tank can be balanced by the vertical movement of the float just above the drop port, and the air at the drop port can be balanced. It is possible to eliminate the suction of water and to fill the reflux pipe with water from the drop port. Therefore, it is possible to remarkably reduce the water noise generated when the filtered water flows down from the filtering device into the water tank body. Therefore, even if the filtering device is operated in a quiet room, the sound of water is not a concern and it does not disturb sleep at night.

[Brief description of drawings]

FIG. 1 is a front view of an aquarium for ornamental fish in which a filtering device is installed.

FIG. 2 is a partially cutaway plan view of the filtration device.

FIG. 3 is a sectional view of the float chamber as seen from the front.

FIG. 4 is a cross-sectional view seen from the left side of the float chamber.

FIG. 5 is a plan view of a float chamber.

FIG. 6 is a sectional view of the drop port showing a state where the float has floated.

FIG. 7 is a perspective view of a drop opening having a cutout portion.

[Explanation of Codes] 1 Filtration device 2 Water tank body 5 Filtration tank 7 Filtration chamber 8 Float chamber 10 Reflux pipe 15 Flow path connecting the filtration chamber and the float chamber 16 Drop port 17 Float 21 Between drop port and bottom face of float Gap

Claims (1)

[Claims] 1. A filtration tank having a filtration tank disposed above the water tank body, wherein the water in the water tank body pumped up by a pump is passed through a filter material in the filtration tank to be filtered, and the filtered water is supplied to a reflux pipe. In the filtration device of the aquarium fish tank returned to the inside of the aquarium body through, while forming a filtration chamber to be loaded with a filter material, to form a float chamber in communication with the filtration chamber, the bottom of the float chamber, An ornament that is characterized in that a lower end opening communicates with a reflux pipe to form a drop opening with an upper end opening, and a float whose bottom surface abuts the opening edge of the drop opening is vertically movable. Filtration device for fish pumping tank.