JP5536399B2 - External filtration device - Google Patents

Description

  The present invention relates to an external filtration device that pumps up water in an aquarium used for breeding ornamental fish, passes the filtration tank, and returns it to the aquarium again, and in particular, an electric motor for automatically priming a circulation pump. The present invention relates to an external filtration device having a built-in suction pump.

  The filtration device that filters the water in the aquarium used for breeding ornamental fish (hereinafter referred to as “aquarium water”) includes an internal filtration type that performs filtration by installing a filter medium in the aquarium water, and the aquarium. There is an external filtration type in which filtration is performed by installing a filtration device on the outside. In particular, the external filtration type filtration device does not reduce the effective volume in the water tank, and it is easy to replace and clean the filter medium and other parts, and has an advantage in maintainability.

  Among these external filtration type filtration devices, there are an independent installation type in which the filtration device is installed separately from the water tank, and a water tank installation type in which the filtration device is installed on the peripheral wall of the water tank. Since the installation-type filtration device has fewer installation space restrictions than the water tank installation type, it is possible to provide a filtration device having a high filtration capacity.

  Among these independently installed external filtration devices, those equipped with a circulation pump for circulating aquarium water for filtration have been put into practical use. In this case, conventionally, since the priming water is supplied to the circulation pump, for example, the user sucks the hose on the drain side of the circulation pump to draw the aquarium water into the circulation pump. An external filtration device having a manual pump that forms a vacuum and supplies aquarium water to a circulation pump has been proposed (see, for example, Patent Document 1).

JP 11-319433 A JP 2000-179465 A

  In the filtering device described in Patent Document 1, since the user does not need to suck the hose, the sanitary problem is solved, but the aquarium water can flow into the circulation pump by the principle of siphon. Until then, it is necessary to repeatedly operate the manual pump, so that the complicated work before starting the circulation pump is still necessary.

  Here, it is conceivable to add an electric suction pump for priming water to the external filtration device, but it is not possible to employ an electric suction pump that rotates an impeller with a motor, similar to a circulation pump. In the first place, the priming water has a purpose to prevent the impeller from spinning idle by preliminarily submerging the circulation pump. If the impeller is not submerged, it does not function as a pump. For this reason, the present applicant has proposed a priming apparatus in which an impeller-type suction pump is provided on the front end side of the water supply pipe, and this is submerged in the water tank to perform priming (Japanese Patent Application No. 2008-108957).

  However, it is preferable that the water supply pipe installed in the water tank has a simple configuration that does not obstruct viewing visually. It is desirable that the configuration for performing priming be stored in the external filtration device. However, in order to suck aquarium water from an external filtration device separated from the aquarium, a high suction force is required, and the external filtration device is enlarged unless the installation space is small.

  Patent Document 2 discloses a diaphragm type air pump capable of sucking and delivering air and water. Since the air pump of this patent document 2 does not use an impeller and can suck and send air and water by a diaphragm, if used as a circulation pump of an external filtration device, it performs both priming and circulation of aquarium water. Can do. However, when the aquarium water is circulated by the diaphragm type air pump, there is a problem that pulsation is generated in the aquarium water sucked and delivered, which is not suitable for circulation of the aquarium water. In addition, when dirty aquarium water is allowed to flow into the air pump, there is a problem that the air pump is clogged. For this reason, it is difficult to apply the diaphragm type air pump of patent document 2 to an external filtration apparatus as it is.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide an external filtration device including a priming motor-driven suction pump having sufficient pump performance while being simple and small.

  In order to achieve the above object, the external filtration device of the present invention is an external filtration device that is installed independently from a water tank, pumps up water in the water tank, passes the filter tank, and returns it to the water tank again. A flow path of water pumped from the water tank, a circulation pump that sucks and discharges water supplied to the filtration tank, and is provided in the flow path, allowing water flow from upstream to downstream, and downstream A check valve that blocks the flow of water from the upstream to the upstream side, and suction and delivery of air and water are possible, and a suction port is connected upstream of the flow path with the check valve as a boundary. An electric suction pump for priming water to the circulation pump, having a delivery port connected downstream of the path, is provided.

  According to such a structure, it becomes possible to make the priming water very easily by setting the negative pressure upstream of the check valve in the apparatus by the electric suction pump. In addition, it is not necessary to provide a configuration for priming water on the water supply pipe side, and the configuration of equipment installed in and around the water tank can be simplified.

  Here, the “flow path” in the present invention broadly includes water passages provided in the external filtration device, for example, pipe-shaped or bowl-shaped water supply paths, drainage paths, and between these water supply paths and drainage paths. Water passages, filtration tanks and the like provided between them are included.

  Preferably, the check valve is provided in the flow path downstream of the filtration tank, the suction port of the electric suction pump is upstream of the check valve, and the outlet of the electric suction pump is the discharge port. Each of the flow paths is connected to the flow path downstream of the check valve.

  According to such a configuration, since the suction port of the electric suction pump is connected downstream of the filtration tank, the priming water that has flowed into the apparatus is sucked into the electric suction pump through the filtration tank. Thereby, only the water purified through the filtration tank is sucked into the electric suction pump, and the electric suction pump can be reliably prevented from being clogged with foreign matter.

  Preferably, the check valve is provided in the flow path upstream of the filtration tank, the suction port of the electric suction pump is upstream of the check valve, and the outlet of the electric suction pump is the discharge port. It is good also as a structure connected to the said flow path downstream from a non-return valve, respectively.

  According to such a configuration, since the suction port of the electric suction pump is connected upstream of the filtration tank, priming can be performed in a short time. That is, when the suction port of the electric suction pump is connected downstream of the filtration tank, priming water cannot be performed unless the pressure in the flow path from the water tank to the filtration tank and the inside of the filtration tank are made negative. On the other hand, when the suction port of the electric suction pump is connected upstream of the filtration tank, priming can be performed quickly only by setting the negative pressure in the flow path from the water tank to the filtration tank. .

  Preferably, a water level sensor for detecting inundation of the circulation pump is provided, and the electric suction pump is stopped and the circulation pump is operated based on a signal from the water level sensor.

  According to such a configuration, when the circulation pump is submerged by the priming water, the operation can be switched from the electric suction pump to the circulation pump, and wasteful power consumption and a failure of the circulation pump can be surely prevented. It becomes possible.

  Preferably, the electric suction pump includes a diaphragm, a housing connected to the diaphragm, a arm with a magnet that is rotatably supported by the housing and connected to the diaphragm, and vibrates the arm with the magnet. An electromagnet for expanding and contracting the diaphragm, a suction valve provided in a suction path in the housing, a delivery valve provided in a delivery path in the housing, and a suction port communicating with the suction path; An electromagnetically driven diaphragm pump provided with a delivery port communicating with the delivery route, sealing the route from the suction port to the delivery port, and surrounding the electromagnet with a waterproof wall to constitute the diaphragm pump The structure is isolated from other members.

  According to such a configuration, the electromagnetically driven diaphragm pump can suck air and water, and mainly includes a diaphragm, a housing, an arm with a magnet, and an electromagnet, and therefore has sufficient pump performance to perform priming. Even if it is provided, the entire pump can be configured to be simple and compact, and can be easily accommodated in an empty space in the housing of the external filtration device.

  According to the external filtration device of the present invention, it is possible to make priming water very easily by setting the upstream side of the check valve in the device to a negative pressure by the electric suction pump. In addition, it is not necessary to provide a configuration for priming water on the water supply pipe side, and the configuration of equipment installed in and around the water tank can be simplified. Furthermore, when an electromagnetically driven diaphragm pump is used, the entire pump can be made simple and compact, and can be easily accommodated in an empty space in the housing of the external filtration device.

It is the schematic which shows the installation state of the external filtration apparatus which concerns on 1st Embodiment of this invention. It is sectional drawing which shows the internal structure of the said external filtration apparatus. It is a perspective view which shows the flow path, check valve, and electric suction pump of the said external filtration apparatus. FIG. 2A shows a configuration of the electric suction pump. FIG. 2A is a cross-sectional view taken along line AA in FIG. 2, FIG. 2B is a cross-sectional view taken along line BB in FIG. These are CC sectional view taken on the line of FIG. It is a flowchart which shows the control subroutine of the said external filtration apparatus. It is sectional drawing which shows the internal structure of the external filtration apparatus which concerns on 2nd Embodiment of this invention.

<First Embodiment>
First, an external filtration device according to a first embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 2, the external filtration device 1 according to the present embodiment includes a check valve 19 in the flow path 17 downstream of the filtration tank 12, and the check of the suction port 141 of the electric suction pump 100. The upstream side 17 a from the valve 19 and the delivery port 142 are connected to the downstream side 17 b from the check valve 19.

<< Overview >>
As shown in FIG. 1, the external filtration device 1 has a pipe-shaped water supply channel 14 and a drainage channel 15 that protrude upward. A water supply pipe 2 is connected to the water supply path 14, and a strainer 2 a provided with a large number of slits is attached to the tip of the water supply pipe 2. The strainer 2 a is disposed near the bottom surface of the water tank 4. On the other hand, the drainage pipe 15 is connected to the drainage pipe 3, and the tip of the drainage pipe 3 is disposed on the water surface of the aquarium water 4a.

  The aquarium water 4 a flows into the water supply pipe 2 through the slit of the strainer 2 a and is supplied into the external filtration device 1. In the vicinity of the bottom surface of the aquarium 4, relatively large foreign matters such as aquatic plants are deposited, but the large foreign matters are caught by the slits of the strainer 2 a, and the relatively small foreign matters and the aquarium water 4 a flow into the water supply pipe 2. The aquarium water 4 a supplied from the water supply pipe 2 through the water supply path 14 into the external filtration device 1 is purified by the filtration tank 12 shown in FIG. 2 and sent to the drainage path 15 by the circulation pump 13. The purified aquarium water 4 a is returned to the aquarium 4 again through the drain pipe 3, and when oxygen falls from the drain pipe 3 to the water surface, oxygen is involved to supply oxygen to the aquarium water 4 a in the aquarium 4.

<< Configuration of external filtration device >>
In FIG. 2, in order of the flow of the aquarium water 4 a, the external filtration device 1 according to this embodiment mainly includes a water supply path 14, a casing 11, a filtration tank 12, a circulation pump 13, a flow path 17 and a check valve 19. And an electric suction pump 100 and a drainage channel 15.

[Water supply channel and filtration tank]
The water supply path 14 is a long cylindrical pipe having an outer diameter substantially equal to the inner diameter of the water supply pipe 2. The upper end side of the water supply channel 14 protrudes to the outside, and the lower end side is inserted into the housing 11. The inside of the housing 11 is a five-layered filtration tank 12 partitioned by four scissors-shaped water-permeable partitions 12a, 12a, 12a, 12a, and the lower end of the water supply channel 14 has four water-permeable partitions. 12a is opened to the lowermost layer of the filtration tank 12. Thereby, the aquarium water 4a pumped up from the water supply pipe 2 by the principle of siphon flows through the water supply path 14, and flows into the lowermost layer of the filtration tank 12 first.

  Next, the configuration of the filtration tank 12 will be described in detail. A plurality of types of filtration media 12b to 12e having different purposes and functions are stored in a stepwise manner in a five-layer space partitioned by the four water-permeable partitions 12a. If it demonstrates sequentially from the bottom, the 1st layer which is the lowest layer of the filtration tank 12 will be filled with many ring-shaped ceramics 12b. Each ring-shaped ceramic 12b disperses the flow of the aquarium water 4a supplied to the first layer and distributes it throughout the ring-shaped ceramic 12b to physically filter large dust and the like.

  In the second and third layers from the bottom of the filtration tank 12, coarse sponges 12c and 12c on which filtered bacteria are attached and propagated are accommodated. Each sponge 12c physically filters small dust that cannot be removed by the ring-shaped ceramic 12b, and decomposes the dirt of the aquarium water 4a by filtering bacteria.

  In the fourth layer from the bottom of the filtration tank 12, a bag of activated carbon 12d is accommodated. This activated carbon 12d adsorbs and filters the turbidity, yellowing and malodor of the aquarium water 4a. In the fifth layer, which is the uppermost layer of the filtration tank 12, a fine wool mat 12e is laid. The wool mat 12e physically filters fine dirt contained in the aquarium water 4a that has passed through the four layers of filtration media 12b to 12d.

[Circulation pump and water level detection chamber]
The uppermost layer of the filtration tank 12 communicates with the flow path 17 through a circular opening provided in the ceiling wall. In the vicinity of the opening in the flow path 17, an impeller (impeller) of the circulation pump 13 is disposed. The circulation pump 13 rotates the impeller by the motor 13a and sucks the aquarium water 4a that has passed through the uppermost layer of the filtration tank 12 to the flow path 17 side.

  In the present embodiment, a water level detection chamber 16 partitioned by a wall is provided beside the impeller of the circulation pump 13 described above. A water level detection sensor 16 a is attached to the side wall of the water level detection chamber 16 at a position substantially the same height as the impeller. As the water level detection sensor 16a, for example, two electrodes separated by a predetermined distance may be provided, and the two electrodes may be brought into conduction by contact with the aquarium water 4a and output a signal. However, the water level detection sensor 16a is not limited to such a configuration, and a sensor having another structure capable of detecting the water level of the aquarium water 4a flowing into the housing 11 may be applied. Such a water level detection sensor 16a outputs a detection signal when the water level of the aquarium water 4a that has passed through the filtration tank 12 reaches the height of the impeller.

  In addition, an air vent valve 16b is provided on the ceiling of the water level detection chamber 16 for releasing indoor air to the outside as the water level of the aquarium water 4a rises. With this air vent valve 16 b, the water level of the aquarium water 4 a in the water level detection chamber 16 can be raised at the same level as the water level in the flow path 17.

[Flow path, check valve and drainage channel]
In FIGS. 2 and 3, the passage 17 is a watertight space having a square cross section surrounded by a wall integrally formed with the housing 11, and a middle portion thereof is partitioned by a check valve 19. The upstream side 17a of the passage 17 with the check valve 19 as a boundary is provided with the above-described impeller of the circulation pump 13. The downstream side 17b is connected to the lower end opening of the drainage passage 15.

  The check valve 19 includes a rectangular plate-shaped valve body 19a that is rotatably attached to the downstream side 17b, and a stopper frame 19b that is watertightly fixed to the upstream side 17a. The vertical and horizontal dimensions of the valve body 19a are slightly smaller than the vertical and horizontal dimensions of the flow path 17, and the tank body 4a flowing from the upstream side 17a to the downstream side 17b is received and rotated to the downstream side 17b. . The stopper frame 19b restricts the rotation of the valve body 19a when the aquarium water 4a flows backward from the downstream side 17b to the upstream side 17a, and prevents the aquarium water 4a flowing back to the valve body 19a.

  Here, small-diameter pipe-shaped connection ports 18a and 18b are erected on the ceiling walls of the upstream side 17a and the downstream side 17b of the flow path 17 partitioned by the check valve 19, respectively. The connection ports 18a and 18b communicate with the space on the upstream side 17a and the space on the downstream side 17b of the flow path 17, respectively.

[Electric suction pump]
As shown in FIG. 1, an electric suction pump 100 is provided at the top of the housing 11 for priming water to the impeller of the circulation pump 13. In this embodiment, for convenience of explanation, the electric suction pump 100 is disposed on the flow path 17 to make each component easy to see. From the viewpoint of arrangement, the electric suction pump 100 is preferably arranged on the same plane as the flow path 17.

  In the present embodiment, an electromagnetically driven diaphragm pump manufactured by Tominaga Resin Industry Co., Ltd. disclosed in JP 2000-179465 A is used as the electric suction pump 100. The diaphragm pump is excellent in the efficiency of suction and delivery of air and water while being small, and the installation space can be easily secured. Hereinafter, the configuration of the electric suction pump 100 will be described in detail with reference to FIGS. 3 and 4A to 4C.

  As shown in FIG. 3, the electric suction pump 100 according to the present embodiment includes a pair of left and right diaphragms 110 and 120 and a driving mechanism thereof. The diaphragms 110 and 120 are contracted and expanded by a common electromagnet 150. It is configured to perform suction and delivery of air and water.

  Inside the tire frames 110 and 120, bottomed cylindrical drums 111 and 121 having an outer diameter equal to the inner diameter are mounted in an airtight and watertight manner. As shown in FIGS. 4 (a) and 4 (b), a pair of small holes are formed in the bottom walls of the drums 111 and 121, respectively, and one small hole is attached to the inside of the bottom wall. The suction valves 111a and 121a are closed. The other small hole is closed by delivery valves 111b and 121b attached to the outside of the bottom wall.

  With the above configuration, when the diaphragms 110 and 120 contract, the air or water in the drums 111 and 121 is sent to the outside from the delivery valves 111b and 121b. Subsequently, when the diaphragms 110 and 120 expand, the external air or water Is sucked into the drums 111 and 121 from the suction valves 111a and 121a.

  Such an assembly of the tire diaphragms 110 and 120 and the drums 111 and 121 is attached to the diaphragm joint portion 131 of the hollow housing 130. The diaphragm joint 131 is a plate-like member having four air passages 131a, 131b, 131c, and 131d formed therein. As shown in FIG. 4A, the upper ends of the air passages 131a and 131b face the suction valve 111a and the delivery valve 111b of the drum 111, respectively. As shown in FIG. 4B, the upper ends of the air passages 131c and 131d are opposed to the delivery valve 121b and the suction valve 121a of the drum 121, respectively. Further, as shown in FIG. 4C, the air passages 131a and 131d communicate with the suction-side space 135 in the hollow housing 130, and the air passages 131b and 131c are the sending-side space 136 in the hollow housing 130. Communicating with These spaces 135 and 136 will be described in detail next.

  Inside the hollow housing 130, a space having a substantially L-shaped cross section formed by the base portion 132 and the columnar portion 133 is formed. This internal space temporarily stores air or water sucked and sent out by the diaphragms 110 and 120, and is divided into two by a partition wall 134 into a suction-side space 135 and a sending-side space 136 ( (Refer FIG.4 (c)). A pipe-shaped suction port 141 and a delivery port 142 are provided in parallel at the upper part of the columnar part 133.

  When the diaphragms 110 and 120 contract, the air or water inside the diaphragms 110 and 120 is sent to the sending-side space 136 through the air passages 131b and 131c, and the same amount of air or water stored in the space 136 is sent. It is sent out from the outlet 142. When the diaphragms 110 and 120 are subsequently expanded, the air or water stored in the suction-side space 135 is sent into the diaphragms 110 and 120 through the air passages 131a and 131d, and the same amount of air. Alternatively, water is sucked from the suction port 141 into the space 135 on the suction side. Such an operation is repeated, and the electric suction pump 100 performs suction and delivery of air or water.

  As shown in FIG. 3, one end of a pair of arms 112 and 122 is rotatably attached to both side walls of the columnar portion 133 of the hollow housing 130. The other ends of the arms 112 and 122 are connected to the tops of the diaphragms 110 and 120, respectively, and magnets 113 and 123 are fixed to the other ends of the arms 112 and 122, respectively. These magnets 113 and 123 are opposed to a single electromagnet 150 through a waterproof wall 160 integrally formed at the top of the housing 11. When an alternating current is applied to the electromagnet 150, the magnets 113 and 123 reciprocate in the horizontal direction in the figure due to electromagnetic action, and the diaphragms 110 and 120 are repeatedly contracted and expanded.

  As shown in FIGS. 2 and 3, in the present embodiment, the suction port 141 of the electric suction pump 100 configured as described above is connected to the connection port 18 a that communicates with the upstream side 17 a of the passage 17, and the delivery port 142. Is connected to a connection port 18 b communicating with the downstream side 17 b of the passage 17. When the electric suction pump 100 is operated, air on the upstream side is sucked from the check valve 19 in the casing 11, and this air flows downstream from the check valve 19 in the casing 11. Sent out. Thereby, the upstream side becomes negative pressure with the check valve 19 in the housing 11 as a boundary. On the other hand, the air sent downstream from the check valve 19 in the housing 11 is sent to the outside through the drain pipe 15 connected to the drain passage 15.

[Other configurations]
Although not shown, a control board, a drive circuit, a power cord, and a start switch for operating the circulation pump 13, the water level detection sensor 16a, and the electric suction pump 100 are provided at the top of the housing 11.

<< Operation of external filtration device >>
Next, operation | movement of the external filtration apparatus 1 of this embodiment which consists of the said structure is demonstrated, referring FIG.1, FIG.2 and FIG.5.

  As shown in FIG. 1, when setting the external filtration apparatus 1 in the aquarium 4, the external filtration apparatus 1 is mounted in the position lower than the water surface of the aquarium water 4a. In this state, when a start switch (not shown) of the external filtration device 1 is turned on (step S10 in FIG. 5), the electric suction pump 100 is started (step S11).

  In FIG. 2, the electric suction pump 100 sucks the air on the upstream side 17 a from the check valve 19 and sends the sucked air to the downstream side 17 b from the check valve 19. Thereby, the upstream side 17a of the flow path 17, the filtration tank 12, the water supply path 14, and the water supply pipe 2 become negative pressure gradually, and it becomes near a vacuum state. Further, when the electric suction pump 100 continues to suck air, the aquarium water 4 a is pumped up through the water supply pipe 2. The aquarium water 4a pumped up flows into the external filtration device 1 according to the siphon principle, and is supplied to the lowermost layer of the filtration tank 12 through the water supply path 14. Thereafter, the aquarium water 4a in the filtration tank 12 rises in water level and passes through the first to fifth layers of the filtration tank 12, thereby being subjected to physical filtration, biological filtration, and adsorption filtration. The aquarium water 4 purified by the filtration tank 12 then raises the water level and submerses the impeller of the circulation pump 13 and the water level detection sensor 16a.

  Then, the electrode of the water level detection sensor 16 immersed in the aquarium water 4a becomes conductive and outputs a detection signal to a control unit (not shown) (step S12 in FIG. 5). The control unit that has received the detection signal stops the electric suction pump 100 (step S13 in FIG. 5) and starts the circulation pump 13 (step S14 in FIG. 5). Thereby, the priming water by the electric suction pump 100 is completed, and thereafter, the aquarium water 4 a is sent to the upstream side 17 b from the check valve 19 by the circulation pump 13. Thereby, the aquarium water 4a is circulated between the external filtration apparatus 1 and the aquarium 4, and purification by the filtration tank 12 is achieved.

  Thereafter, when the start switch of the external filtration device 1 is turned OFF, the control unit stops the circulation pump 13. If the start switch is turned on again, the control unit executes the control in steps S10 to S16 of FIG.

<< Effects of First Embodiment >>
As described above, according to the external filtration device 1 according to the present embodiment, the electric suction pump 100 causes the upstream side 17a of the check valve 19 in the external filtration device 1 to have a negative pressure, so that priming can be performed very easily. Can be performed. Moreover, it becomes unnecessary to provide the structure for performing priming on the water supply pipe 2 side, and the structure of the apparatus installed in the water tank 4 and the periphery of the water tank 4 can be simplified. Furthermore, when an electromagnetically driven diaphragm pump is used, the pump 100 as a whole can have a simple and compact configuration, and can be easily accommodated in an empty space in the housing 11 of the external filtration device 1. is there.

  In addition to this, in this embodiment, since the suction port 141 of the electric suction pump 100 is connected downstream of the filtration tank 12, the electric suction pump 100 sucks the aquarium water 4a that has flowed into the flow path 17 all at once. Even in this case, clogging of the electric suction pump 100 due to foreign matters can be reliably prevented.

Second Embodiment
Next, an external filtration device 10 according to a second embodiment of the present invention will be described with reference to FIG. In addition, in the same figure, the same code | symbol is attached | subjected about the location similar to 1st Embodiment mentioned above, and detailed description is abbreviate | omitted.

  As shown in FIG. 6, the external filtration apparatus 10 according to the present embodiment divides the water supply channel 14 in the first embodiment into a first water supply channel 14A and a second water supply channel 14B, and these water supply channels 14A and 14B. It is the structure which has arrange | positioned the flow path 17 between these.

  The flow path 17 is partitioned into an upstream side 17a and a downstream side 17b by a check valve 19, and the first water supply path 14A is connected to the upstream side 17a, and the second water supply path 14B is connected to the downstream side 17b. It is. The lower end of the second water supply passage 14B passes through the four water passage partitions 12a and opens in the lowermost layer of the filtration tank 12. The suction port 141 of the electric suction pump 100 is connected to the upstream side 17 a from the check valve 19, and the delivery port 142 is connected to the downstream side 17 b from the check valve 19.

  In the external filtration device 10 having the above-described configuration, when a start switch (not shown) is turned ON, the electric suction pump 100 is started to suck the air in the upstream side 17a of the flow path 17, the water supply path 14, and the water supply pipe 2, The sucked air is sent to the downstream side 17b from the check valve 19. Then, the upstream side 17a of the flow path 17, the water supply path 14, and the water supply pipe 2 become negative pressure in a short time and become close to a vacuum state. When the electric suction pump 100 continues to suck air, the aquarium water 4 a is pumped into the external filtration device 10 through the water supply pipe 2.

  The pumped-up aquarium water 4 a flows from the upstream side 17 a of the flow path 17 to the downstream side 17 b through the check valve 19, and is supplied to the lowermost layer of the filtration tank 12 through the water supply path 14. Thereafter, the aquarium water 4a in the filtration tank 12 rises in water level and passes through the first to fifth layers of the filtration tank 12, thereby being subjected to physical filtration, biological filtration, and adsorption filtration. The aquarium water 4 purified by the filtration tank 12 then raises the water level and submerses the impeller of the circulation pump 13 and the water level detection sensor 16a.

  Then, the water level detection sensor 16 immersed in the aquarium water 4a outputs a detection signal, and a control unit (not shown) that receives the signal stops the electric suction pump 100 and activates the circulation pump 13. Thereby, the priming water by the electric suction pump 100 is completed, and the aquarium water 4a is circulated between the external filtration device 10 and the aquarium 4, and purification by the filtration tank 12 is achieved.

  According to the external filtration device 10 of this embodiment, since the suction port 141 of the electric suction pump 100 is connected upstream of the filtration tank 12, the air in the filtration tank 12 having a relatively large capacity is sucked. This makes it possible to perform priming in a short time. That is, the electric suction pump 100 can perform priming quickly only by setting the upstream side 17a of the flow path 17 having a relatively small capacity, the water supply path 14, and the water supply pipe 2 to a negative pressure.

DESCRIPTION OF SYMBOLS 1, 10 External filtration apparatus 11 Case 12 Filtration tank 12a Water flow partition 12b Filtration medium 13 Circulation pump 14, 14A, 14B Water supply path 14a Water supply port 15 Drainage path 15a Drainage port 16 Water level detection chamber 16a Water level detection sensor 16b Air vent valve 17 Flow path 17a Upstream side 17b Downstream side 18a, 18b Connection port 19 Check valve 19a Valve body 19b Stopper frame 100 Electric suction pump 110, 120 Diaphragm 111, 121 Drum 111a, 121a Suction valve 111b, 121b Delivery valve 112, 122 Arm 113, 123 Magnet 130 Hollow housing 131 Diaphragm joint part 131a, 131b, 131c, 131d Air passage 132 Base part 133 Column part 134 Partition wall 141 Suction port 142 Outlet 150 Electromagnet 160 Waterproof wall 2 Water supply pad Flop 2a strainer 3 drainage pipe 4 water tank 4a aquarium water

Claims (5)

An external filtration device that is installed independently from the water tank, pumps up water in the water tank, passes it through the filtration tank, and returns it to the water tank;
A housing of the external filtration device provided with the filtration tank therein;
A flow path provided in the housing, located upstream or downstream of the filtration tank, through which water pumped from the water tank flows ;
A circulation pump that is provided in the housing and sucks and delivers the water supplied to the filtration tank;
A check valve provided in the flow path, which allows water flow from upstream to downstream and blocks water flow from downstream to upstream;
Air and water can be aspirated and delivered, and with the check valve as a boundary, a suction port is connected upstream of the flow channel and a discharge port is connected downstream of the flow channel, and the priming water is connected to the circulation pump An electric suction pump for performing
An external filtration device comprising:   The check valve is provided in the flow path downstream of the filtration tank, the suction port of the electric suction pump is upstream of the check valve, and the delivery port of the electric suction pump is the check valve The external filtration device according to claim 1, wherein the external filtration device is connected to each of the flow paths downstream from the flow path.   The check valve is provided in the flow path upstream of the filtration tank, the suction port of the electric suction pump is upstream of the check valve, and the delivery port of the electric suction pump is the check valve The external filtration device according to claim 1, wherein the external filtration device is connected to each of the flow paths downstream from the flow path. Wherein the housing includes a water level sensor for detecting the flooding of the circulation pump, based on a signal from the water level sensor, with stopping the electric suction pump, according to claim 1 which was decided to run the circulation pump 3. The external filtration device according to any one of 3. The electric suction pump includes a diaphragm, a housing connected to the diaphragm, a arm with a magnet that is rotatably supported by the housing and connected to the diaphragm, and vibrates the arm with the magnet. An electromagnet for expanding and contracting the diaphragm; a suction valve provided in a suction path in the housing; a delivery valve provided in a delivery path in the housing; a suction port communicating with the suction path; and the delivery path An electromagnetically driven diaphragm pump with a delivery port communicating with
5. The external filtration device according to claim 1, wherein a path from the suction port to the delivery port is sealed, and the electromagnet is surrounded by a waterproof wall and is isolated from other members constituting the diaphragm pump.

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