JPS6241051B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a purification device for purifying water in bathtubs, fish farming tanks, etc., and uses a circulation pump whose discharge and inflow are reversed by forward and reverse rotation to create a backflow in the filter medium and purify the filter medium. The purpose of the present invention is to provide a purification device that automatically cleans and does not require maintenance for a long period of time.

In conventional devices, dirt and other dirt adheres to the filter media,
When the purifying function was exhausted, the filter medium was taken out, washed and reused, or replaced with a completely new filter medium. Therefore, it is necessary to always check the degree of contamination of the filter medium from the outside, and there is also the disadvantage that it is time-consuming to clean and replace the filter medium.

The present invention solves the above-mentioned drawbacks of the conventional filter by causing a backflow in the filter medium by forward and reverse rotation of the circulation pump, and in particular, generates a swirling backflow to perform automatic self-cleaning of the filter.

Embodiments of the present invention will be described below with reference to FIGS. 1 to 7.
This will be explained based on the diagram.

In FIG. 1, reference numeral 1 denotes a purifier, which is made of, for example, resin and has a large number of granular filter media 2 that sink into water, and a first flow path 3 that communicates with the upper surface of the filter media 2;
The tangential direction of the outer circumference of the bottom of the filter medium container of purifier 1 (third
(see Fig. 4). 5 is a circulation pump whose flow direction is reversed by forward and reverse rotation. The circulation pump used in this example is a vane-type positive displacement pump that can achieve high efficiency and high head. 6 is a three-way switching valve that switches the flow path between the first flow path 3, the circulation path A7, and the discharge path 8. 9
is circulation path B. A third flow path 10 is provided in the center of the bottom of the purifier 1 in parallel with the second flow path 4, and the third flow path 10 has a non-return check whose forward direction is from the purifier 1 to the circulation pump 5. A valve 11 is inserted. 1
2 is a bathtub. The solid line arrow indicates the flow direction during purification, and the dotted line arrow indicates the flow direction during self-cleaning.

In FIGS. 2 to 4, the purifier 1 is divided into a filter medium container 13 and a lid part 14, which are tightened with screws 16 with a sealing material 15 between them. A receiving container 17 is integrally formed with the filter medium container 13 on the upper outer periphery of the filter medium container 13 . A first flow path 3 is provided on the bottom surface of the receiving container 17.

In Fig. 5, 18 is a rotating heel;
The direction switching valves 6 are connected to the first flow path 3, the circulation path A7, and the discharge path 8, respectively. The solid line indicates the flow direction during purification, and the dotted line indicates the flow direction during self-cleaning.

FIG. 6 shows the flow direction inside the purifier 1. 6th
The solid line in Figure a shows the flow direction during purification, and Figure 6a shows the flow direction during self-cleaning.

FIG. 7 shows an electric circuit, where 19 is a forward/reverse switch for the motor 21, 20 is a relay, and the motor 21 is
circuit switching contact 22, switching contact 23 of the switching valve 6
have. 24 is a coil for driving the switching valve 6. 25 is a power switch.

In the above configuration, the forward/reverse changeover switch 19 is opened and set in the purification direction, and the power switch 25 is closed. The circulation pump 5 rotates counterclockwise as indicated by the solid arrow, and the switching valve 6 is in the state shown in FIG. 5a. As a result, the bath water flows into the circulation path A7 and flows into the upper part of the purifier 1 from the first inflow path 3 of the purifier 1. The flow that has entered the purifier 1 is filtered with dirt and the like in the filter medium 2, and then flows into the second flow path 4 and the third flow path 10, and is inserted into the third flow path 10 and flows through the check valve 11. The water is then pressurized by the circulation pump 5 and returned to the bathtub 12. During this circulation process, contaminated water is purified in the purifier 1.

Next, the forward/reverse switch 21 is closed, set to the self-cleaning direction, and the power switch 25 is closed. The circulation pump 5 rotates clockwise as indicated by the dotted arrow, and the switching valve 6 is in the state shown in FIG. 5b. As a result, the bath water flows into the circulation path B9, is pressurized by the circulation pump 5, does not flow into the third flow path 10 in which the check valve 11 is inserted, and flows into the purifier 1 from the second flow path 4. do. The flow that enters the purifier 1 from the second flow path 4 enters from the tangential direction of the filter medium container 13, and thus flows upward while swirling within the container 13. Due to this swirling flow, the filter medium is pushed against the outer circumferential wall and rotates, resulting in an agitated state. (Fig. 6b), as a result, the dirt such as dust collected in the filter medium 2 is liberated and flowed upward on the swirling flow, and overflows from the outer periphery of the container 13 into the receiving container 17. . The flow entering the receiving container 17 containing dirt is passed from the first flow path 3 to the switching valve 6.
It passes through and is discharged to the outside from the discharge passage 8. During this backflow process, dirt such as dust collected on the filter medium 2 is discharged to the outside and is self-cleaned. In particular, due to the action of the swirling flow, dust is efficiently collected in the circumferential direction and taken out to the outside.

As is clear from the above description, the purification device of the present invention is a self-cleaning system in which the flow direction is reversed by forward and reverse rotation of the circulation pump, causing backflow in the filter medium, and in particular, generating swirling backflow.
It is easy to reverse the flow direction and simultaneously control the flow path switching valve, that is, to control the switching between purification and self-cleaning. Further, due to the swirling flow, dirt is quickly separated from the filter medium, centrifugal force acts on the dirt, and the dirt flows smoothly out of the filter medium container 13. As a result, effects such as less water being discharged to the outside during self-cleaning can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a system diagram showing an embodiment of the purifier of the present invention, Fig. 2 is a side view of the purifier, Fig. 3 is a sectional view of the purifier, and Fig. 4 is an A of the purifier shown in Fig. 2. ―
A sectional view, FIG. 5 is a sectional view of the switching valve of the purification device, FIG. 6 is a sectional view showing the flow direction in the purifier,
FIG. 7 is an electrical circuit diagram of the purification device. DESCRIPTION OF SYMBOLS 1... Purifier, 2... Filter medium, 3... First flow path, 4... Second flow path, 5... Circulation pump, 6... Switching valve, 10... Third flow path, 11... Check valve, 13... Filter medium container , 17...
receiving container.

Claims (1)

[Scope of Claims] 1. A purifier into which a filter medium is inserted, which has a first flow path communicating with the top surface of the filter medium in the filter medium container and a second flow path communicating in the tangential direction of the bottom of the filter medium container, and the second flow path. It consists of a circulation pump provided in the first flow path whose flow direction is reversed by forward and reverse rotation, and a three-way valve provided in the first flow path that switches the flow path according to the rotation direction of the circulation pump,
A purification device characterized by enabling self-cleaning of a filter medium by switching the pump between forward and reverse directions. 2. A patent claim characterized in that the filter medium container of the purifier has a third flow path connected to the bottom, and a check valve is inserted into the third flow path with the direction of outflow from the purifier being the forward direction. The purifying device according to item 1 in the scope of the invention. 3. The purification device according to claim 1, wherein the container in which the filter medium is sealed has a receiving container on the outer periphery of the upper part, and the first flow path is connected to the bottom of the receiving container.