JP2023177935A - Communication pipe type circulation filtration apparatus - Google Patents

Abstract

To provide a communication pipe type circulation filtration apparatus that can clean the interiors of a communication pipe and a level pipe, and make the interiors sanitary.SOLUTION: Bathtubs 1 and 2 are arranged at approximately the same level, and each lower part of the bathtubs 1 and 2 is connected to each upper part of the bathtubs 1 and 2 in a loop with a circulation pipe 5 via a filtration unit 3 and a heating unit 4. A level pipe 6 is provided at approximately the same level as the bathtubs 1 and 2, and the bottom of the bathtubs 1 and 2 and the bottom of the level pipe 6 are connected with a communication pipe 7. A circulation/drainage branch pipe 9-1 is also connected that branches from the communication pipe 7 to the downstream side of circulation pipe 5 or to the drainage system. In the circulation/drainage branch pipe 9-1, there are provided branch pipe flow control valves 9-1a, 9-1b, 9-1c and a branch pipe pump 9-1d. When the branch pipe flow control valves 9-1a and 9-1b are open, the circulation/drainage branch pipe 9-1 acts as a circulation branch pipe, and when the branch pipe flow control valves 9-1a and 9-1c are open, the circulation/drainage branch pipe 9-1 acts as a drainage branch pipe.SELECTED DRAWING: Figure 1

Description

The present invention relates to a communication pipe type circulation filtration device for a plurality of tanks.

Conventionally, in conventional communication pipe circulation filtration devices that have multiple tanks, such as multiple bathtubs, pools, etc., one pump is used and one filtration unit is used to perform filtration due to installation space and cost considerations (reference: patent Reference 1). In this case, the filtration unit is equipped with a circulation pipe that connects each lower part of the plurality of tanks and each upper part of the plurality of tanks in a loop, and a communication pipe that connects the plurality of tanks and a level pipe that detects the water surface level. , maintain the water surface level of the plurality of tanks at the same level as the water surface level of the level pipe. Thereby, the water of the plurality of tanks can be circulated in the circulation pipe to constantly clean the plurality of tanks, and the water level between the plurality of tanks can be maintained at the same level by the communication pipe.

Japanese Patent Application Publication No. 2005-137630 JP2005-329381A JP2015-104718A (Patent No. 6253376)

However, in the above-mentioned conventional communication pipe type circulation filtration device, since the communication pipe is isolated, the water in the communication pipe and the level pipe accumulates and cannot be cleaned, which is a problem in terms of hygiene.

Note that there is a non-communicating pipe type circulation filtration device that does not use a communicating pipe. For example, in the first non-communicating pipe type circulation filtration device, in order to eliminate the water level balance between tanks caused by the difference in discharge and suction flow rates, a necessary number of surface water suction devices or a similar surface water recovery function are installed. By placing it in each tank, it is used as a circulation pipe as a surface water suction pipe (see Patent Document 2). On the other hand, in the second non-communicating pipe circulation filtration device that does not use a communicating pipe, the discharge port of each tank is connected to the filtration unit, and the amount branched from the filtration unit to the inlet of each tank is controlled. It is controlled according to the value of the pressure sensor of each tank (see Patent Document 3).

However, in the above-mentioned first non-communicating pipe type circulation filtration device, the device becomes complicated and maintenance becomes troublesome. In addition, adding or reducing the number of tanks is extremely difficult due to equipment modification. Furthermore, when cleaning with a chemical such as hydrogen peroxide, each tank must be filled with water, which increases cleaning costs. On the other hand, in the above-mentioned second non-communicating pipe type circulation filtration device, since a pressure sensor is provided and the control is complicated, the manufacturing cost of the device is high. Further, if the pressure sensor and the control unit that performs the control fail, the tank itself cannot be used.

In order to solve the above-mentioned problems, the communication pipe type circulation filtration device according to the present invention has a plurality of tanks arranged at approximately the same level, and a loop-shaped structure that connects each lower part of the plurality of tanks and each upper part of the plurality of tanks to each other in a loop. a circulation pipe connected to the circulation pipe, a circulation pipe pump and filtration unit installed in the loop of the circulation pipe, a level pipe for detecting the water surface level of multiple tanks, and a communication pipe communicating with the multiple tanks and level pipes. This is a communication pipe type circulation filtration device comprising: a circulation branch pipe branching from the communication pipe to the circulation pipe, or a drainage branch pipe branching from the communication pipe to the drainage equipment.

According to the present invention, the inside of the communication pipe and the level pipe can be cleaned by discharging the water in the communication pipe and the level pipe through the circulation branch pipe or the drainage branch pipe, thereby making it sanitary.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows 1st Embodiment of the communicating pipe type circulation filtration apparatus based on this invention. FIG. 2 is a diagram for explaining the operation of the communication pipe and level pipe in FIG. 1; FIG. 2 is a diagram for explaining a cleaning operation of the communication pipe and level pipe in FIG. 1 using circulating water. FIG. 2 is a diagram for explaining a cleaning operation by draining the communication pipe and level pipe in FIG. 1; FIG. 2 is a diagram for explaining a cleaning operation using make-up water/drainage of the communication pipe and level pipe in FIG. 1; It is a figure which shows the example of a change of the communicating pipe type circulation filtration apparatus of FIG. It is a figure which shows the 2nd embodiment of the communicating pipe type circulation filtration apparatus based on this invention. FIG. 8 is a diagram for explaining the operation of the communication pipe and level pipe in FIG. 7; It is a figure which shows the example of a change of the communicating pipe type circulation filtration apparatus of FIG. FIG. 10 is a diagram for explaining a cleaning operation using make-up water/drainage of the communication pipe and level pipe in FIG. 9; It is a figure which shows the 3rd embodiment of the communicating pipe type circulation filtration apparatus based on this invention. 12 is a diagram showing a detailed structure of the ejector of FIG. 11. FIG. It is a figure which shows the example of a change of the communicating pipe type circulation filtration apparatus of FIG. It is a figure which shows the 4th embodiment of the communicating pipe type circulation filtration apparatus based on this invention. FIG. 15 is a diagram showing a system having a plurality of communicating tubes and a single circulation tube to which the communicating tube type circulation filtration device of FIG. 1, FIG. 7, FIG. 11, and FIG. 14 is applied.

FIG. 1 is a diagram showing a first embodiment of a communicating pipe type circulation filtration device according to the present invention.

In FIG. 1, the bathtubs 1 and 2 are arranged at approximately the same level, and the lower portions (or bottoms) of the bathtubs 1 and 2 and the upper portions of the bathtubs 1 and 2 are connected to each other via a circulation pipe via a filtration unit 3 and a heating unit 4. 5 are connected in a loop. The filtration unit 3 includes sand, porous ceramic, etc., and suppresses the propagation of Legionella bacteria and the like. It may also include a deep ultraviolet generator, a photocatalyst, and the like, and may also include a hair catcher for removing hair and the like. The heating unit 4 is an electric heater, a heat pump, a heat exchanger, or the like. Further, a circulation pipe pump 5a is provided upstream of the filtration unit 3. That is, the circulation pipe pump 5a sucks water from the lower portions of the bathtubs 1 and 2 and discharges it toward the filtration unit 3. As a result, when the circulation pipe pump 5a is turned on, the water in the bathtubs 1 and 2 circulates in the circulation pipe 5, and at that time, it is filtered by one filtration unit 3, and is filtered by one heating unit 4. heated.

Further, a level pipe 6 is provided at approximately the same level as the bathtubs 1 and 2, and the bottoms of the bathtubs 1 and 2 and the bottom of the level pipe 6 are connected by a communication pipe 7. The level pipe 6 has a pressure sensor and the like whose pressure changes depending on the water surface level. Communication pipe flow rate control valves 7a, 7b, and 7c (or electromagnetic valves) are provided on the bathtubs 1, 2 and level pipe 6 sides in the communication pipe 7.

Further, above the bathtubs 1 and 2, a make-up water tank 8 (or water faucet) and a make-up water flow rate control valve 8a (or solenoid valve) are provided. The make-up water tank 8 (or water tap) is also referred to as the make-up water side.

Furthermore, a branch pipe (hereinafter referred to as a circulation/drainage branch pipe) 9-1 that branches from the communication pipe 7 to the downstream side of the circulation pipe 5 or to drainage equipment is connected. However, for example, in the claims, the circulation/drainage branch pipe 9-1 may be simply referred to as the circulation branch pipe 9-1. That is, the circulation/drainage branch pipe 9-1 is connected to the downstream side of the filtration unit 3 or the heating unit 4, and is also connected to the drainage equipment. In the circulation/drainage branch pipe 9-1, branch pipe flow control valves 9-1a, 9-1b, 9-1c (or electromagnetic valves) and a branch pipe pump 9-1d are provided. The branch pipe pump 9-1d sucks water from within the communication pipe 7 and discharges it to the circulation pipe 5 or drainage equipment. In this case, the branch pipe flow control valve 9-1a is arranged upstream of the branch pipe pump 9-1d, and the branch pipe flow control valves 9-1b and 9-1c are arranged downstream of the branch pipe pump 9-1d. placed on the side. Further, the branch pipe flow control valve 9-1b is connected to the downstream side of the filtration unit 3 (heating unit 4) of the circulation pipe 5, and the branch pipe flow control valve 9-1c is connected to the drainage equipment side. Therefore, when the branch pipe flow control valves 9-1a and 9-1b are opened, the circulation/drainage branch pipe 9-1 acts as a circulation branch pipe, and the branch pipe pump 9-1d is in communication. The water in the pipe 7 is sucked in and discharged toward the downstream side of the circulation pipe 5. On the other hand, when the branch pipe flow control valves 9-1a and 9-1c are opened, the circulation/drainage branch pipe 9-1 acts as a drainage branch pipe, and the branch pipe pump 9-1d operates the communication pipe. Drain the water in 7.

The control circuit 10, for example, a microcomputer, receives the water level signal 6a of the level pipe 6, and controls the circulation pipe pump 5a, the communication pipe flow control valves (electromagnetic valves) 7a, 7b, 7c, the make-up water flow control valve 8a, and the branch pipe. Controls flow control valves (electromagnetic valves) 9-1a, 9-1b, and 9-1c.

Furthermore, a make-up water branch pipe 11 branched from the communication pipe 7 to the make-up water side is provided. The make-up water branch pipe 11 sucks water from the make-up water side and discharges it to the communication pipe 7 side via make-up water flow rate control valves 11a, 11b, and 11c controlled by the control circuit 10. The replenishment water branch pipe 11 will be described later.

FIG. 2 is a diagram for explaining the operation of the communication pipe 7 and level pipe 6 in FIG. It has been omitted.

In FIG. 2, the control circuit 10 opens the communication pipe flow rate control valves 7a, 7b, and 7c, and opens the branch pipe flow rate control valves 9-1a, 9-1b, and 9-1c (see FIG. 1), and controls the make-up water flow rate. The valves 11a, 11b, and 11c (see FIG. 5) are closed, and the branch pipe pump 9-1d (see FIG. 1) is turned off. As a result, the water level in the bathtubs 1 and 2 is controlled to be the same as the water level in the level pipe 6. That is, when the water level of one of bathtubs 1 and 2 rises, the water in that bathtub flows to the other bathtub, and conversely, when the water level of one of bathtubs 1 and 2 falls, the water in the other bathtub flows to that bathtub. The water level in bathtubs 1 and 2 becomes the same. At the same time, the water level in the bathtubs 1 and 2 is detected by the level tube 6. As a result, when the water surface level signal 6a of the level pipe 6 is lower than a predetermined value, the control circuit 10 opens the make-up water flow rate control valve 8a, and water is supplied from the make-up water tank (or tap) 8 to the bathtubs 1 and 2. When the water surface level signal 6a of the level pipe 6 reaches a predetermined value, the control circuit 10 closes the make-up water flow rate control valve 8a. In this way, the water surface level of the bathtubs 1 and 2 is brought to a predetermined level. Note that even when the water surface level signal 6a of the level pipe 6 is higher than a predetermined value, the control circuit 10 maintains the make-up water flow rate control valve 8a closed.

FIG. 3 is a diagram for explaining the cleaning operation of the communication pipe 7 and level pipe 6 in FIG. It has been omitted.

The cleaning operation of the portion of the communication pipe 7 that communicates with the bathtub 1 will be described with reference to FIG. 3A. In this case, the control circuit 10 opens, closes, and closes the communicating pipe flow control valves 7a, 7b, and 7c, opens the branch pipe flow control valves 9-1a, 9-1b, and opens the branch pipe flow control valve 9. -1c is closed and branch pipe pump 9-1d is turned on. As a result, the circulation/drainage branch pipe 9-1 acts as a circulation branch pipe, and the water in the bathtub 1 is transferred from the communication pipe flow control valve 7a to the branch pipe flow control valve 9-1a and the branch pipe pump 9-1d. and flows to the downstream side of the circulation pipe 5 via the branch pipe flow control valve 9-1b. Therefore, the portion of the communication pipe 7 that communicates with the bathtub 1 is cleaned. In this case, the water used for cleaning returns to the bathtubs 1 and 2 via the circulation pipe 5 and is recovered.

The cleaning operation of the portion of the communication pipe 7 that communicates with the bathtub 2 will be described with reference to FIG. 3(B). In this case, the control circuit 10 closes, opens, and closes the communication pipe flow control valves 7a, 7b, and 7c, opens the branch pipe flow control valves 9-1a, 9-1b, and opens the branch pipe flow control valves 9-1 and 9. -1c is closed and branch pipe pump 9-1d is turned on. As a result, the circulation/drainage branch pipe 9-1 acts as a circulation branch pipe, and the water in the bathtub 2 is transferred from the communication pipe flow control valve 7b to the branch pipe flow control valve 9-1a and the branch pipe pump 9-1d. and flows to the downstream side of the circulation pipe 5 via the branch pipe flow control valve 9-1b. Therefore, the portion of the communication pipe 7 that communicates with the bathtub 2 is cleaned. In this case, the water used for cleaning returns to the bathtubs 1 and 2 via the circulation pipe 5 and is recovered.

The cleaning operation of the level pipe 6 will be explained with reference to FIG. 3(C). In this case, the control circuit 10 closes, closes, and opens the communicating pipe flow control valves 7a, 7b, and 7c, opens the branch pipe flow control valves 9-1a, 9-1b, and 9-1c, and opens the branch pipe flow control valves 9-1a, 9-1b, and 9-1c. The flow rate control valve 9-1c is closed and the branch pipe pump 9-1d is turned on. As a result, the circulation/drainage branch pipe 9-1 acts as a circulation branch pipe, and the water in the level pipe 6 is transferred from the communication pipe flow control valve 7c to the branch pipe flow control valve 9-1a and the branch pipe pump 9-. 1d and the branch pipe flow control valve 9-1b to the downstream side of the circulation pipe 5. Therefore, the level tube 6 portion is cleaned. In this case, the water used for cleaning returns to the bathtubs 1 and 2 via the circulation pipe 5 and is recovered.

The cleaning operation of the portion of the communication pipe 7 that communicates with the bathtubs 1 and 2 and the portion of the level pipe 6 will be explained with reference to FIG. 3(D). In this case, the control circuit 10 opens, opens, and opens the communicating pipe flow control valves 7a, 7b, and 7c, opens the branch pipe flow control valves 9-1a, 9-1b, and opens the branch pipe flow control valve 9. -1c is closed and branch pipe pump 9-1d is turned on. As a result, the circulation/drainage branch pipe 9-1 acts as a circulation branch pipe, and the water in the bathtubs 1 and 2 flows from the communication pipe flow control valves 7a and 7b, and the water in the level pipe 6 flows through the communication pipe flow control valves 7a and 7b. It flows from the valve 7c to the downstream side of the circulation pipe 5 via the branch pipe flow control valve 9-1a, the branch pipe pump 9-1d, and the branch pipe flow control valve 9-1b. Therefore, the portion of the communication pipe 7 that communicates with the bathtubs 1 and 2 and the portion of the level pipe 6 are cleaned. In this case, the water used for cleaning returns to the bathtubs 1 and 2 via the circulation pipe 5 and is recovered.

When cleaning two parts of the communication pipe 7 communicating with the bathtubs 1 and 2 and the level pipe 6, two of the communication pipe flow control valves 7a, 7b, and 7c are opened, and the other parts are opened. , close one of the branch pipe flow control valves 9-1a and 9-1b, close the branch pipe flow control valve 9-1c, and turn on the branch pipe pump 9-1d to perform circulation/drainage. The branch pipe 9-1 may be used as a circulating branch pipe.

FIG. 4 is a diagram for explaining the cleaning operation by draining the communication pipe 7 and level pipe 6 in FIG. 1, and the filtration unit 3, heating unit 4, circulation pipe 5, and makeup water tank 8 in FIG. There is. In this case, the makeup water branch pipe 11 is not operated.

The cleaning operation of the portion of the communication pipe 7 that communicates with the bathtubs 1 and 2 and the portion of the level pipe 6 will be explained. In this case, the control circuit 10 opens, opens, and opens the communicating pipe flow control valves 7a, 7b, and 7c, opens the branch pipe flow control valves 9-1a, 9-1c, and opens the branch pipe flow control valve 9. -1b is closed and branch pipe pump 9-1d is turned on. As a result, the circulation/drainage branch pipe 9-1 becomes a drainage branch pipe, and the water in the bathtubs 1 and 2 and the water in the level pipe 6 flow from the communication pipe flow control valves 7a, 7b, and 7c to the branch pipe flow control valve 9. -1a, flows to the drainage equipment via the branch pipe pump 9-1d and the branch pipe flow control valve 9-1c. Therefore, the portion of the communication pipe 7 that communicates with the bathtubs 1 and 2 and the level pipe 6 is cleaned. In this case, since the water used for cleaning is drained, the amount of water in the bathtubs 1 and 2, the level pipe 6, and the communication pipe 7 decreases. In this case, the makeup water flow rate control valve 8a is opened to directly increase the amount of water in the bathtubs 1 and 2.

FIG. 5 is a diagram for explaining the cleaning operation of the communication pipe 7 and the level pipe 6 in FIG. 1 using make-up water/drainage, and shows the filtration unit 3, heating unit 4, circulation pipe 5, and make-up water tank 8 in FIG. has been omitted. In this case, the makeup water branch pipe 11 is operated.

As shown in FIG. 5, the makeup water branch pipe 11 is connected to the communication pipe 7 via makeup water flow rate control valves 11a, 11b, and 11c, and is symmetrical to the circulation/drainage branch pipe 9-1 with respect to the communication pipe 7. It is located at Therefore, the make-up water sucked in by the make-up water branch pipe 11 widely passes through the communication pipe 7 and is washed before flowing into the circulation/drainage branch pipe 9-1.

A cleaning operation using make-up water/drainage of the portion of the communication pipe 7 that communicates with the bathtubs 1 and 2 and the level pipe 6 will be explained. In this case, the control circuit 10 closes, closes, and closes the communicating pipe flow rate control valves 7a, 7b, and 7c, opens, opens, and opens the makeup water flow rate control valves 11a, 11b, and 11c, and opens the branch pipe flow rate control valves. 9-1a and 9-1c are opened, the branch pipe flow control valve 9-1b (see FIG. 1) is closed, and the branch pipe pump 9-1d is turned on. As a result, the circulation/drainage branch pipe 9-1 becomes a drainage branch pipe, and makeup water is supplied from the makeup water flow control valves 11a, 11b, and 11c to the branch pipe flow control valve 9-1a and the branch pipe pump 9-1d. and flows to the drainage equipment via the branch pipe flow control valve 9-1c. Therefore, the portion of the communication pipe 7 that communicates with the bathtubs 1 and 2 and the level pipe 6 is cleaned. In this case, although the water used for cleaning is drained, the communication pipe 7 is replenished with makeup water, so the amount of water in the bathtubs 1 and 2, the level pipe 6, and the communication pipe 7 does not decrease.

FIG. 6 is a diagram showing a modification of the communicating tube type circulation filtration device of FIG. 1.

In FIG. 6, the branch pipe flow control valves 9-1b and 9-1c of FIG. 1 are removed, and a branch pipe pump 9-1d is directly connected to the downstream side of the circulation pipe 5. Therefore, since the communication pipe 7 is cleaned only with circulating water, the amount of water does not decrease. As a result, makeup water is not required, so the makeup water branch pipe 11 is not provided.

FIG. 7 is a diagram showing a second embodiment of the communicating tube type circulation filtration device according to the present invention.

In FIG. 7, a circulation branch pipe 9-2 is provided in place of the circulation/drainage branch pipe 9-1 of FIG. The circulation branch pipe 9-2 is branched from the communication pipe 7 and is connected to the upstream side (suction side) of the circulation pipe pump 5a. Further, a branch pipe flow control valve 9-2a (or solenoid valve) is provided in the circulation branch pipe 9-2, and a circulation pipe flow control valve 5b (or a solenoid valve) is provided on the upstream side of the circulation pipe pump 5a in the circulation pipe 5. or solenoid valve). However, if the circulation pipe flow rate control valve 5b is removed and the circulation pipe pump 5a is turned on, the circulation pipe 5 may be always operated.

Also in FIG. 7, when the control circuit 10 opens the communicating pipe flow control valves 7a, 7b, and 7c and closes the branch pipe flow control valve 9-2a, the water level in the bathtubs 1 and 2 changes to the water level in the level pipe 6. It is controlled to be the same as the level.

FIG. 8 is a diagram for explaining the cleaning operation of the communication pipe 7 and level pipe 6 of FIG. 7 using circulating water, and the filtration unit 3 and heating unit 4 of FIG. 7 are omitted.

The cleaning operation of the portion of the communication pipe 7 that communicates with the bathtub 1 will be described with reference to FIG. 8(A). In this case, the control circuit 10 opens, closes, and closes the communication pipe flow control valves 7a, 7b, and 7c, and opens the branch pipe flow control valve 9-2a. As a result, water in the bathtub 1 flows from the communication pipe flow control valve 7a to the downstream side of the circulation pipe 5 via the branch pipe flow control valve 9-2a. Therefore, the portion of the communication pipe 7 that communicates with the bathtub 1 is cleaned. In this case, the water used for cleaning returns to the bathtubs 1 and 2 via the circulation pipe 5 and is recovered.

The cleaning operation of the portion of the communication pipe 7 that communicates with the bathtub 2 will be described with reference to FIG. 8(B). In this case, the control circuit 10 closes, opens, and closes the communication pipe flow control valves 7a, 7b, and 7c, and opens the branch pipe flow control valve 9-2a. As a result, water in the bathtub 2 flows from the communication pipe flow control valve 7b to the downstream side of the circulation pipe 5 via the branch pipe flow control valve 9-2a. Therefore, the portion of the communication pipe 7 that communicates with the bathtub 2 is cleaned. In this case, the water used for cleaning returns to the bathtubs 1 and 2 via the circulation pipe 5 and is recovered.

The cleaning operation of the level pipe 6 will be explained with reference to FIG. 8(C). In this case, the control circuit 10 closes, closes, and opens the communicating pipe flow control valves 7a, 7b, and 7c, and opens the branch pipe flow control valve 9-2a. As a result, water in the level pipe 6 flows from the communication pipe flow control valve 7c to the downstream side of the circulation pipe 5 via the branch pipe flow control valve 9-2a. Therefore, the level tube 6 portion is cleaned. In this case, the water used for cleaning returns to the bathtubs 1 and 2 via the circulation pipe 5 and is recovered.

The cleaning operation of the portion of the communication pipe 7 that communicates with the bathtubs 1 and 2 and the portion of the level pipe 6 will be described with reference to FIG. 8(D). In this case, the control circuit 10 opens, opens, and opens the communication pipe flow control valves 7a, 7b, and 7c, and opens the branch pipe flow control valve 9-2a. As a result, the water in the bathtubs 1 and 2 flows from the communication pipe flow control valves 7a and 7b, and the water in the level pipe 6 flows from the communication pipe flow control valve 7c through the branch pipe flow control valve 9-2a to the circulation pipe 5. flows downstream. Therefore, the portion of the communication pipe 7 that communicates with the bathtubs 1 and 2 and the portion of the level pipe 6 are cleaned. In this case, the water used for cleaning returns to the bathtubs 1 and 2 via the circulation pipe 5 and is recovered.

When cleaning two parts of the communication pipe 7 communicating with the bathtubs 1 and 2 and the level pipe 6, two of the communication pipe flow control valves 7a, 7b, and 7c are opened, and the other parts are opened. It is sufficient to close one of the branch pipe flow control valves 9-2a and open the branch pipe flow control valve 9-2a.

FIG. 9 is a diagram showing a modification of the communicating tube type circulation filtration device of FIG. 7.

In FIG. 9, a drainage branch pipe 9-2' branched from the communication pipe 7 to the drainage equipment is connected, and the drainage branch pipe 9-2' is connected to a drainage flow rate control valve 9-2' connected in series. a and a drain pump 9-2'b. Further, a make-up water branch pipe 11 branched from the communication pipe 7 to the make-up water side is connected. The makeup water branch pipe 11 includes makeup water flow rate control valves 11a, 11b, and 11c. Therefore, similar to the communication pipe type circulation filtration device shown in FIG. 1, the washing operation of the communication pipe 7 and the level pipe 6 shown in FIG. 9 can be performed using drainage/replenishment water.

For example, the cleaning operation of the portion of the communication pipe 7 that communicates with the bathtubs 1 and 2 and the portion of the level pipe 6 in which the replenishment water branch pipe 11 is not operated will be explained. In this case, the control circuit 10 opens, opens, and opens the communication pipe flow rate control valves 7a, 7b, and 7c, opens the drain flow rate control valve 9-2'a, and turns on the drain pump 9-2'b. . As a result, the water in the bathtubs 1 and 2 and the water in the level pipe 6 are transferred from the communication pipe flow control valves 7a, 7b, and 7c to the branch pipe flow control valve 9-1a, the drain pump 9-2'b, and the drain flow control valve 9. Flows to the drainage facility via -2'a. Therefore, the portion of the communication pipe 7 that communicates with the bathtubs 1 and 2 and the level pipe 6 is cleaned. In this case, since the water used for cleaning is drained, the amount of water in the bathtubs 1 and 2, the level pipe 6, and the communication pipe 7 decreases. In this case, the makeup water flow rate control valve 8a is opened to directly increase the amount of water in the bathtubs 1 and 2.

As shown in FIG. 10, the make-up water branch pipe 11 is connected to the communication pipe 7 via make-up water flow rate control valves 11a, 11b, and 11c, and is symmetrical with respect to the communication pipe 7 to the drainage branch pipe 9-2'. It is located in Therefore, the make-up water sucked in by the make-up water branch pipe 11 widely passes through the communication pipe 7 and is washed before flowing into the drainage branch pipe 9-2'.

A cleaning operation using make-up water/drainage of the portion of the communication pipe 7 that operates the make-up water branch pipe 11 that communicates with the bathtubs 1 and 2 and the level pipe 6 will be explained. In this case, the control circuit 10 closes, closes, and closes the communication pipe flow rate control valves 7a, 7b, and 7c, opens, and opens the makeup water flow rate control valves 11a, 11b, and 11c, and opens the drain flow rate control valve 9- 2'a and turn on the drain pump 9-2'b. As a result, makeup water flows from the makeup water flow control valves 11a, 11b, 11c to the drainage equipment via the drainage pump 9-2'b and the drainage flow rate control valve 9-2'a. Therefore, the portion of the communication pipe 7 that communicates with the bathtubs 1 and 2 and the level pipe 6 is cleaned. In this case, although the water used for cleaning is drained, the communication pipe 7 is replenished with makeup water, so the amount of water in the bathtubs 1 and 2, the level pipe 6, and the communication pipe 7 does not decrease.

FIG. 11 is a diagram showing a third embodiment of a communicating pipe type circulation filtration device according to the present invention.

In FIG. 11, a circulation branch pipe 9-3 and a branch pipe flow control valve 9-3a are provided in place of the circulation branch pipe 9-2 and branch pipe flow control valve 9-2a in FIG. 12, a circulation branch pipe 9-3 is connected between the circulation pump 5a of the circulation pipe 5 and the filtration unit 3.

FIG. 12 is a diagram showing the detailed structure of the ejector 12 of FIG. 11.

As shown in FIG. 12A, the ejector 12 houses a nozzle 122 having a driving fluid inlet 121 for sucking the driving fluid F1, and a low pressure generated by the driving fluid F1 downstream of the nozzle 122. A body 124 having a suction fluid inlet 123 for sucking suction fluid F2 into region LR, and a discharge fluid outlet for sucking and mixing driving fluid F1 and suction fluid F2 as high-speed jetting fluid F3 and discharging the mixture as discharge fluid F4. 125 and a diffuser (mixing section) 126. The nozzle 122 converts the pressure energy of the driving fluid F1 into kinetic energy (depressurization, acceleration), and on the other hand, the diffuser (mixing section) 126 has a suction section 1261 whose diameter gradually becomes smaller and a compression/boosting section 1262 whose diameter gradually increases. , and recovers kinetic energy to pressure energy (deceleration, pressure increase). Here, water from the circulation pump 5a is used as the driving fluid F1, water from the circulation branch pipe 9-3 is used as the suction fluid F2, and water is sent to the filtration unit 3 as the discharge fluid F4.

In FIG. 11, an auxiliary valve may be provided upstream or downstream of the circulation pump 5a. The suction speed of water in the circulation branch pipe 9-3 as the suction fluid F2 is determined by the design of the nozzle 122 of the ejector 12, the diffuser 126, and the design of the circulation pump 5a, and the flow rate of water in the circulation branch pipe 9-3 can be adjusted to be very small compared to the flow rate of water in the circulation pump 5a.

In FIG. 11, the water levels in the bathtubs 1, 2 and the level pipe 6 can be adjusted by opening the communication pipe flow control valves 7a, 7b, and 7c and closing the branch pipe flow control valve 9-3a. On the other hand, by opening at least one of the communication pipe flow control valves 7a, 7b, and 7c and the branch pipe flow control valve 9-3a, the communication pipe 7 and the level pipe 6 can be cleaned with circulating water.

FIG. 12(B) is a modification of FIG. 12(A).

As shown in FIG. 12B, the body 124 is provided with an air fluid inlet 127 for drawing air fluid F5. The air fluid F5 is outside air. Thereby, microbubbles and/or ultrafine bubbles are mixed into the discharged fluid F4, and as a result, the cleaning effect of the circulation pipe 5 and the communication pipe 7 can be promoted. The air fluid F5 may also be an air fluid containing clusters of water molecules gathered around ions, which is generated by plasma discharge such as arc discharge or corona discharge. Furthermore, the air fluid F5 may be an air fluid containing ozone. This also makes it possible to sterilize the circulation pipe 5 and the communication pipe 7.

FIG. 13 is a diagram showing a modification of the communicating pipe type circulation filtration device of FIG. 11.

In FIG. 13, a drainage branch pipe 9-3' branched from the communication pipe 7 to the drainage equipment is connected, and the drainage branch pipe 9-3' is connected to a drainage flow rate control valve 9-3' connected in series. a and a drain pump 9-3'b. Further, a make-up water branch pipe 11 branched from the communication pipe 7 to the make-up water side is connected. The makeup water branch pipe 11 includes makeup water flow rate control valves 11a, 11b, and 11c. Therefore, similar to the communication pipe type circulation filtration device shown in FIG. 1, the washing operation of the communication pipe 7 and the level pipe 6 shown in FIG. 9 can be performed using drainage/replenishment water.

For example, a cleaning operation by draining the portion of the communication pipe 7 that communicates with the bathtubs 1 and 2 and the level pipe 6 without operating the replenishment water branch pipe 11 will be described. In this case, the control circuit 10 opens, opens, and opens the communication pipe flow rate control valves 7a, 7b, and 7c, opens the drain flow rate control valve 9-3'a, and turns on the drain pump 9-3'b. . As a result, the water in the bathtubs 1 and 2 and the water in the level pipe 6 flow from the communication pipe flow rate control valves 7a, 7b, and 7c to the drainage equipment via the drain pump 9-3'b and the drain flow rate control valve 9-3'a. flows. Therefore, the portion of the communication pipe 7 that communicates with the bathtubs 1 and 2 and the level pipe 6 is cleaned. In this case, since the water used for cleaning is drained, the amount of water in the bathtubs 1 and 2, the level pipe 6, and the communication pipe 7 decreases. In this case, the makeup water flow rate control valve 8a is opened to directly increase the amount of water in the bathtubs 1 and 2.

A cleaning operation using make-up water/drainage of the portion of the communication pipe 7 that operates the make-up water branch pipe 11 that communicates with the bathtubs 1 and 2 and the level pipe 6 will be explained. In this case, the control circuit 10 opens, opens, and opens the communication pipe flow rate control valves 7a, 7b, and 7c, opens, and opens the make-up water flow rate control valves 11a, 11b, and 11c, and opens the drainage flow rate control valve 9- 3'a and turn on the drain pump 9-3'b. As a result, makeup water flows from the makeup water flow rate control valves 11a, 11b, 11c to the drainage equipment via the drainage pump 9-3'b and the drainage flow rate control valve 9-3'a. Therefore, the portion of the communication pipe 7 that communicates with the bathtubs 1 and 2 and the level pipe 6 is cleaned. In this case, although the water used for cleaning is drained, the communication pipe 7 is replenished with makeup water, so the amount of water in the bathtubs 1 and 2, the level pipe 6, and the communication pipe 7 does not decrease.

FIG. 14 is a diagram showing a fourth embodiment of a communicating pipe type circulation filtration device according to the present invention.

In FIG. 14, a circulation branch pipe is not provided, but a drainage branch pipe 9-4 and a replenishment water branch pipe 11 branched from the communication pipe 7 to the drainage equipment are provided. The drainage branch pipe 9-4 includes a drainage flow rate control valve 9-4a and a drainage pump 9-4b connected in series. The makeup water branch pipe 11 includes makeup water flow rate control valves 11a, 11b, and 11c.

In FIG. 14, the communication pipe 7 and the level pipe 6 can be drained or cleaned with makeup water.

The cleaning operation of the portion of the communication pipe 7 that communicates with the bathtubs 1 and 2 and the portion of the level pipe 6 in which the replenishment water branch pipe 11 is not operated will be explained. In this case, the control circuit 10 opens, opens, and opens the communication pipe flow rate control valves 7a, 7b, and 7c, opens the drain flow rate control valve 9-4a, and turns on the drain pump 9-4b. As a result, the water in the bathtubs 1 and 2 and the water in the level pipe 6 flow from the communication pipe flow control valves 7a, 7b, and 7c to the branch pipe flow control valve 9-1a, the drain pump 9-4b, and the drain flow control valve 9-4a. Flows through to drainage equipment. Therefore, the portion of the communication pipe 7 that communicates with the bathtubs 1 and 2 and the level pipe 6 is cleaned. In this case, since the water used for cleaning is drained, the amount of water in the bathtubs 1 and 2, the level pipe 6, and the communication pipe 7 decreases. In this case, the amount of water in bathtubs 1 and 2 is increased directly.

Also, the cleaning operation of the portion of the communication pipe 7 that operates the replenishment water branch pipe 11 that communicates with the bathtubs 1 and 2 and the level pipe 6 will be explained. In this case, the control circuit 10 closes, closes, and closes the communication pipe flow rate control valves 7a, 7b, and 7c, opens, and opens the makeup water flow rate control valves 11a, 11b, and 11c, and opens the drain flow rate control valve 9- 4a and turn on the drain pump 9-4b. As a result, makeup water flows from the makeup water flow rate control valves 11a, 11b, and 11c to the drainage equipment via the drainage pump 9-4b and the drainage flow rate control valve 9-4a. Therefore, the portion of the communication pipe 7 that communicates with the bathtubs 1 and 2 and the level pipe 6 is cleaned. In this case, although the water used for cleaning is drained, the communication pipe 7 is replenished with makeup water, so the amount of water in the bathtubs 1 and 2, the level pipe 6, and the communication pipe 7 does not decrease.

The communicating tube type circulation filtration apparatus of FIGS. 1, 7, 11, and 14 can be applied to a system having only one circulation tube and a plurality of communicating tubes, as shown in FIG. 15. In any of (A), (B), (C), and (D) of FIG. 15, each communication pipe 7-1 (7-2, 7-3) is located at almost the same level as the bathtub 1- 1 (1-2, 1-3), bathtub 2-1 (2-2, 2-3), and level pipe 3-1 (3-2, 3-3). The circulation pipe 5 connects each lower part and each upper part of the bathtubs 1-1, 1-2, 1-3, 2-1, 2-2, and 2-3 in a loop, and a circulation pipe pump and a filtration pipe are connected in the loop. It has a unit. For example, the communication pipe 7-1 communicates with multiple bathtubs and level pipes in the men's bathroom, the communication pipe 7-2 communicates with multiple bathtubs and level pipes in the women's bathroom, and the communication pipe 7-3 communicates with multiple bathtubs and level pipes in the women's bathroom. A system is assumed in which the system communicates with a plurality of bathtubs and level pipes in a bathroom, is provided on the same floor, and is filtered by a common circulation pipe 5.

As shown in FIG. 15(A), when the communicating tube type circulation filtration device of FIG. 1 is expanded and applied to a system having a plurality of communicating tubes, the circulation tube 5 and One circulation/drainage branch pipe 9-1 branched to the drainage equipment is connected to the circulation pipe 5 or drainage via a branch pipe pump 9-1d and further via a branch pipe flow control valve 9-1b or 9-1c. Selectively connected to equipment.

As shown in FIG. 15(B), when the communicating pipe type circulation filtration device of FIG. 7 is expanded to a system having a plurality of communicating pipes, One branched circulation branch pipe 9-2 is connected to the upstream side of the circulation pump 5a of the circulation pipe 5.

As shown in FIG. 15(C), when the communicating tube type circulation filtration device of FIG. 11 is expanded to a system having a plurality of communicating tubes, One branched circulation branch pipe 9-3 is connected to the suction fluid inlet 123 of the ejector 12 provided in the circulation pipe 5.

As shown in FIG. 15(D), when the communicating pipe type circulation filtration device of FIG. One branched drainage branch pipe 9-4 is connected to drainage equipment. Further, one make-up water branch pipe 11 branched from the communication pipes 7-1, 7-2, and 7-3 to the make-up water side is connected. This makes it possible to clean the communication pipes 7-1, 7-2, and 7-3 with drainage water, and to wash the communication pipes 7-1, 7-2, and 7-3 with make-up water/drainage water.

In addition, in the above-mentioned embodiment, three or more bathtubs can be provided. Further, if a pool is provided instead of a bathtub, the heating unit is omitted.

Further, in the above-described embodiments, the flow control valve or the solenoid valve may be a manual on-off valve.

Furthermore, in the above-described embodiment, the circulation pump 5a, the filtration unit 3, and the heating unit 4 are arranged in this order from the upstream side to the downstream side in the circulation pipe 5, but the present invention is not limited thereto.

Furthermore, the present invention may be applied to any modifications within the obvious scope of the embodiments described above.

The communicating pipe type circulation filtration device according to the present invention can be used in a water treatment device, etc., equipped with a plurality of bathtubs, pools, etc.

1, 2, 1-1, 1-2, 1-3, 2-1, 2-2, 2-3: Bathtub 3, 3-1, 3-2, 3-3: Filtration unit 4: Heating unit 5 : Circulation pipe 5a: Circulation pipe pump 5b: Circulation pipe flow control valve 6: Level pipe 6a: Water surface level signal 7: Communication pipe 7a, 7b, 7c: Communication pipe flow control valve (electromagnetic valve)
8: Makeup water tank (water tap) (makeup water side)
8a: Makeup water flow control valve (solenoid valve)
9-1: Circulation/drainage branch pipe (circulation branch pipe)
9-1a, 9-1b, 9-1c: Branch pipe flow control valve (solenoid valve)
9-1d: Branch pipe pump 9-2: Circulation branch pipe 9-2a, 9-2b: Branch pipe flow control valve (electromagnetic valve)
9-3: Circulation branch pipe 9-3': Drainage branch pipe 9-3'a: Drainage flow rate control valve (electromagnetic valve)
9-3'b: Drainage pump 9-4: Drainage branch pipe 9-4a: Drainage flow control valve (solenoid valve)
9-4b: Drainage pump 10: Control circuit 11: Makeup water branch pipe 11a, 11b, 11c: Makeup water flow rate control valve (electromagnetic valve)
12: Ejector 121: Driving fluid inlet 122: Nozzle 123: Suction fluid inlet 124: Body 125: Discharge fluid outlet 126: Diffuser (mixing part)
1261: Suction section 1262: Compression/boosting section 127: Air fluid inlet F1: Driving fluid F2: Suction fluid F3: High speed injection fluid F4: Discharge fluid F5: Air fluid

Claims (25)

Multiple tanks placed at almost the same level,
a circulation pipe connecting each lower part of the plurality of tanks and each upper part of the plurality of tanks in a loop shape;
a circulation pipe pump and a filtration unit provided in the loop of the circulation pipe;
a level pipe for detecting the water surface level of the plurality of tanks;
A communication pipe type circulation filtration device comprising: a plurality of tanks and a communication pipe communicating with the level pipe,
A communication pipe type circulation filtration device including a circulation branch pipe branching from the communication pipe to the circulation pipe. The filtration unit is provided downstream of the circulation pipe pump,
The communication pipe type circulation filtration device according to claim 1, wherein the circulation branch pipe is connected to the downstream side of the filtration unit of the circulation pipe. moreover,
a plurality of communication pipe on-off valves provided on the side of the plurality of tanks and the level pipe in the communication pipe;
A first branch pipe opening/closing valve and a branch pipe pump connected in series within the circulation pipe branch pipe,
opening the communication pipe on-off valve and closing the first branch pipe on-off valve to operate the communication pipe and the level pipe;
The communicating pipe system according to claim 2, wherein at least one of the communicating pipe opening/closing valves and the first branch pipe opening/closing valve are opened, and the branch pipe pump is turned on to clean the communicating pipe and the level pipe. Circulating filtration device. moreover,
a second branch pipe on-off valve connected between the downstream side of the series connection of the first branch pipe on-off valve and the branch pipe pump and the downstream side of the filtration unit;
The first branch pipe on-off valve and a drainage on-off valve connected between the downstream side of the series connection of the branch pipe pump and drainage equipment,
At least one of the communication pipe on-off valves and the first and second branch pipe on-off valves are opened, the drainage branch pipe on-off valve is closed, the branch pipe pump is turned on, and the communication pipe and cleaning the level pipe;
At least one of the communicating pipe on-off valves, the first branch pipe on-off valve, and the drainage on-off valve are opened, the second branch pipe on-off valve is closed, and the branch pipe pump is turned on. 4. The communication pipe type circulation filtration device according to claim 3, wherein water in the communication pipe and the level pipe is drained. Further, a make-up water branch pipe is provided that branches from the communication pipe to the make-up water side, is connected to the communication pipe, and includes a plurality of make-up water on-off valves corresponding to the plurality of communication pipe on-off valves,
The communication pipe according to claim 4, wherein at least one of the make-up water on-off valves and the first branch pipe on-off valve are opened, and the drain pump is turned on to wash the communication pipe and the level pipe with the make-up water. System circulation filtration device. 2. The communication pipe type circulation filtration device according to claim 1, wherein the circulation branch pipe is connected upstream of the circulation pipe pump. moreover,
a plurality of communication pipe on-off valves provided on the side of the plurality of tanks and the level pipe in the communication pipe;
and a third branch pipe opening/closing valve provided in the circulation branch pipe,
operating the communication pipe and the level pipe by opening at least one of the communication pipe on-off valves and closing the third branch pipe on-off valve;
The communication pipe system circulation according to claim 6, wherein at least one of the communication pipe on-off valves and the third branch pipe on-off valve are opened, and the circulation pipe pump is turned on to clean the communication pipe and the level pipe. Filtration device. Furthermore, a drainage branch pipe is provided that branches from the communication pipe to the drainage equipment and includes a drainage pump and a drainage on-off valve connected in series,
At least one of the communication pipe on-off valves and the third branch pipe on-off valve are opened, the drainage on-off valve is closed, and the communication pipe and the level pipe are cleaned;
At least one of the communicating pipe opening/closing valves and the drain opening/closing valve are opened, the third branch pipe opening/closing valve is closed, and the drain pump is turned on to drain water in the communicating pipe and the level pipe. Item 7. The communicating tube type circulation filtration device according to item 7. Further, a make-up water branch pipe is provided that branches from the communication pipe to the make-up water side, is connected to the communication pipe, and includes a plurality of make-up water on-off valves corresponding to the plurality of communication pipe on-off valves,
The communication pipe according to claim 8, wherein at least one of the make-up water on-off valves and the third branch pipe on-off valve are closed, and the drain pump is turned on to wash the communication pipe and the level pipe with make-up water. System circulation filtration device. The filtration unit is provided downstream of the circulation pipe pump,
Further, an ejector is provided between the downstream side of the circulation pipe pump and the filtration unit and connected to the circulation branch pipe,
The ejector is
a nozzle having a driving fluid inlet for sucking water from the circulation pipe pump as a driving fluid;
a body accommodating the nozzle and having a suction fluid inlet for sucking water from the circulation branch pipe as suction fluid into a low-pressure region by the driving fluid downstream of the nozzle;
The communicating pipe type circulation filtration device according to claim 1, further comprising: a diffuser having a discharge fluid outlet for mixing the driving fluid and the blowing fluid and discharging the mixture as discharge fluid to the filtration unit. 11. The communicating tube type circulation filtration device according to claim 10, wherein the body is provided with an air fluid inlet for drawing air fluid, and the discharged fluid contains bubbles. 12. The communication tube type circulation filtration device according to claim 11, wherein the air fluid includes clusters of water molecules gathered around ions generated by plasma discharge. 12. The communication pipe type circulation filtration device according to claim 11, wherein the air fluid is an air fluid containing ozone. Furthermore, a plurality of communication pipe on-off valves provided on the side of the plurality of tanks and the level pipe in the communication pipe,
and a fourth branch pipe opening/closing valve provided in the circulation branch pipe,
operating the communication pipe and the level pipe by opening at least one of the communication pipe on-off valves and closing the fourth branch pipe on-off valve;
The communication pipe type circulation according to claim 10, wherein at least one of the communication pipe on-off valves and the fourth branch pipe on-off valve are opened, and the circulation pipe pump is turned on to clean the communication pipe and the level pipe. Filtration device. Furthermore, a drainage branch pipe is provided that branches from the communication pipe to the drainage equipment and includes a drainage pump and a drainage on-off valve connected in series,
At least one of the communication pipe on-off valves and the fourth branch pipe on-off valve are opened, the drainage on-off valve is closed, and the communication pipe and the level pipe are cleaned;
At least one of the communicating pipe opening/closing valves and the drain opening/closing valve are opened, the fourth branch pipe opening/closing valve is closed, and the drain pump is turned on to drain water in the communicating pipe and the level pipe. 15. The communicating tube type circulation filtration device according to item 14. Further, a make-up water branch pipe is provided that branches from the communication pipe to the make-up water side, is connected to the communication pipe, and includes a plurality of make-up water on-off valves corresponding to the plurality of communication pipe on-off valves,
16. The communication pipe system according to claim 15, wherein at least one of the make-up water on-off valves and the fourth branch pipe on-off valve are closed, and the drain pump is turned on to wash the communication pipe and the level pipe with make-up water. Circulating filtration device. Multiple tanks placed at almost the same level,
a circulation pipe connecting each lower part of the plurality of tanks and each upper part of the plurality of tanks in a loop shape;
a circulation pipe pump and a filtration unit provided in the loop of the circulation pipe;
a level pipe for detecting the water surface level of the plurality of tanks;
A communication pipe type circulation filtration device comprising: a plurality of tanks and a communication pipe communicating with the level pipe,
A communication pipe type circulation filtration device that is provided with a drainage branch pipe branching from the communication pipe to a drainage facility. moreover,
a plurality of communication pipe on-off valves provided on the side of the plurality of tanks and the level pipe in the communication pipe;
A drainage branch pipe branching from the communication pipe to a drainage facility and including a drainage pump and a drainage opening/closing valve connected in series,
Opening at least one of the communication pipe on-off valves, closing the drainage on-off valve, turning off the drainage pump, and operating the communication pipe and the level pipe;
Open at least one of the communication pipe on-off valves and the drainage on-off valve, turn on the drainage pump, and clean the communication pipe and the level pipe;
The communicating pipe type circulation filtration device according to claim 17, wherein at least one of the communicating pipe opening/closing valves and the drain opening/closing valve are opened, and the drainage pump is turned on to drain the water in the communicating pipe and the level pipe. Further, a make-up water branch pipe is provided that branches from the communication pipe to the make-up water side, is connected to the communication pipe, and includes a plurality of make-up water on-off valves corresponding to the plurality of communication pipe on-off valves,
19. The communication pipe type circulation filtration device according to claim 18, wherein at least one of the make-up water on-off valves and the drain water on-off valve are opened, and the drain pump is turned on to wash the communication pipe and the level pipe with the make-up water. A communication pipe type circulation filtration device comprising a plurality of communication pipes and a single circulation pipe, wherein each communication pipe detects a plurality of tanks arranged at approximately the same level and the water surface level of the plurality of tanks. communicates with the level pipe for
The circulation pipe has a filtration unit and a circulation pipe pump and connects each lower part of the tank and each upper part of the tank in a loop shape,
Each of the communication pipes and the circulation pipe are connected by one circulation branch pipe, and the inside of each of the communication pipes and the level pipe are cleaned by circulating the water in each of the communication pipes and the level pipes into the circulation pipe. A communication pipe type circulation filtration device. 21. The communication pipe type circulation filtration device according to claim 20, wherein the circulation branch pipe is connected to the downstream side of the filtration unit of the circulation pipe. 21. The communication pipe type circulation filtration device according to claim 20, wherein the circulation branch pipe is connected to the upstream side of the circulation pump of the circulation pipe. The filtration unit is provided downstream of the circulation pipe pump,
Further, an ejector is provided between the downstream side of the circulation pipe pump and the filtration unit and connected to the circulation branch pipe,
The ejector is
a nozzle having a driving fluid inlet for sucking water from the circulation pipe pump as a driving fluid;
a body that accommodates the nozzle and has an opening for sucking water from the circulation branch pipe as suction fluid into a low-pressure region by the driving fluid downstream of the nozzle;
and a diffuser having a discharge fluid outlet for mixing the driving fluid and the blowing fluid and discharging the mixture as discharge fluid to the filtration unit, and the circulation branch pipe is connected to the suction fluid port. 20. The communicating tube type circulation filtration device described in . A communication pipe type circulation filtration device comprising a plurality of communication pipes and a single circulation pipe, wherein each communication pipe detects a plurality of tanks arranged at approximately the same level and the water surface level of the plurality of tanks. communicates with the level pipe for
The circulation pipe has a filtration unit and a circulation pipe pump and connects each lower part of the tank and each upper part of the tank in a loop shape,
Each of the communicating pipes and the drainage equipment are connected by one drainage branch pipe, and the communicating pipe circulation system cleans the inside of each of the communicating pipes and the level pipe by draining the water in each of the communicating pipes and the level pipes. Filtration device. Furthermore, each of the communication pipes and the make-up water side are connected by one make-up water branch pipe, and the water in each of the communication pipes and the level pipes is made up/drained, so that the inside of each of the communication pipes and the level pipe is The communicating tube type circulation filtration device according to claim 24, which is washed.

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