JPH0642934B2 - Filtration device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a filtering device.

(Prior Art) The applicant previously proposed Japanese Patent Application No. 2-74 as a bath water filtering device.
No. 283 is invented. In this product, when the bubble bath operation in which the filtering operation is performed in parallel, by performing the backwashing operation of the filtering tank prior to the filtering operation, the bad odor in the filtering tank is removed and the bather's discomfort is eliminated. Was doing. In addition, a large number of filtration beads were filled in the filtration tank.

(Problems to be Solved by the Invention) In the above-mentioned conventional technique, in order to prevent drainage and freezing of bath water, water in the filter tank is drained and the filter beads are fixed by a scale or the like to form a large lump. there were. When the filter beads became a large mass, water could not pass through the gaps between the individual beads and the resistance increased.

When the backwashing operation is performed in this state, the agglomerates of the beads are pushed up by the backwashing water and hit the wall of the filtration tank to break the agglomerates to some extent, but before the beads are restored to the original fine beads by the decomposing force of water. However, it was discharged out of the filtration tank together with the backwash water.

The present invention has been made in view of the above-mentioned drawbacks of the prior art, and an object of the present invention is to provide a filtration device that prevents the filtration beads from being discharged to the outside of the filtration tank during the backwash operation.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the filtration device of the present invention is provided with a circulation circuit for circulating hot water in a bath and a filtration tank having filter beads filled therein. A filtration circuit connected to the circuit; a backwash drain circuit branched from the filtration circuit upstream of the filtration tank; and a backwash circuit connected to the filtration circuit downstream of the filtration tank. , Backwashing water is made to flow from the backwashing circuit back to the filtration tank to the drainage circuit for backwashing before performing the backwashing operation of the hot water flowing through the circulation circuit, and further before the backwashing operation. A configuration is provided in which a control unit is provided for supplying water in an amount equal to or less than the volume of the tank and allowing it to stand for a predetermined time.

(Operation) According to the present invention, by performing the backwashing operation before the filtering operation, the bad odor in the filtration tank is removed and the discomfort of the bathtub is eliminated, and the backwashing operation is performed before the backwashing operation. By adding an amount of water equal to or less than the volume of the tank, the filter beads fixed and aggregated with the scale are collided with the wall of the filter tank and crushed. Next, in this state, it is left for a predetermined time and the scale is decomposed with water to restore the original fine beads. Then, by performing a backwashing operation thereafter, the beads are prevented from being discharged to the outside of the filtration tank.

(Example) Hereinafter, one example of the present invention will be specifically described with reference to the drawings.

FIG. 1 is an overall configuration diagram of a bubble bath reheating device in which an automatic hot water supply reheating function is added to a filtration device with a foam function.

In FIG. 1, 1 is a bathtub, 2 is a circulation circuit for circulating hot water in the bathtub 1, and the circulation circuit 2 is provided with a non-self-priming pump 5 for forcedly circulating hot water. . The discharge side flow path of the pump 5 is a plurality of flow paths, for example, the back side flow path.
A foam ejector 35 is provided at the end of each flow path, that is, the bath discharge part, which is divided into the flow path 33 and the foot-side flow path 34. Further, flow rate control valves 31, 32 are respectively provided in the respective flow paths 33, 34,
The foot side flow path 34 is provided with a pressure sensor 7 as a pressure detecting means for detecting the water level in the bathtub 1. The back side flow path 33 and the foot side flow path 34 are arranged below the pump 5.

Reference numeral 4 denotes a reheating circuit branched from the discharge side of the pump 5 of the circulation circuit 2, for detecting a bath heat exchanger 6 for heating hot water, a water flow switch 8 used for circulation determination, and the hot water temperature in the bathtub 1. The thermistor 9 and the reheating circuit 4 are provided with a self-priming pump 21 for flowing hot water. The reheating circuit 4 includes a three-way valve 42.
Through a flow path 33 of the circulation circuit 2 into a downstream side of the flow rate control valve 31 and a circuit 50 which is connected to the upstream side of the flow rate control valves 31 and 32. ing.

3 is a hot water supply circuit for dropping hot water into the bathtub 1,
The hot water suction circuit 3 is connected to the bathtub 1 via the reheating circuit 4. The hot water supply circuit 3 is connected to the reheating circuit 4 from city water through the hot water supply heat exchanger 10, and the hot water supply branch circuit 11 is branched from the hot water supply circuit 3 downstream of the hot water supply heat exchanger 10. ing. The hot water supply branching circuit 11 is connected to a shower, a currant, or the like, and supplies hot water to these devices. An inlet water flow rate sensor 12 for detecting an inlet water flow rate from city water and a thermistor 13 for detecting a water temperature are provided on the upstream side of the hot water heat exchanger 10 in the hot water supply circuit 3, and the hot water heat exchanger 10 is provided. Provided between the hot water supply branch circuit 11 and the hot water supply branch circuit 11 are a flow rate control valve 14 for adjusting the incoming water flow rate, and a thermistor 15 for detecting the hot water supply temperature of the hot water supply heat exchanger 10. Reference numeral 38 denotes a bypass passage that connects the upstream side and the downstream side of the hot water supply heat exchanger 10, and the bypass passage 38 is provided with a solenoid valve 39 that opens and closes according to a set value of a hot water supply temperature setter (not shown). There is.
Further, on the downstream side of the hot water supply branch circuit 11, a drop flow rate sensor 17 for detecting a drop flow rate into the bathtub 1,
A vacuum breaker 18, an opening / closing valve 19 for opening and closing the hot water supply circuit 3, and a check valve 20 are provided.
Reference numeral 16 denotes a three-way valve provided in the hot water supply circuit 3 downstream of the check valve 20, which branches a backwash circuit 30 connected to a filtration tank described later.

Reference numeral 23 is a filtration circuit that branches from the discharge side of the pump 5 of the circulation circuit 2 and is joined and connected to the suction side of the pump 5, and a filtration tank 22 is provided midway. The filtration tank 22 is filled with filtration beads (not shown) having a specific gravity larger than that of water. Then, the backwash drainage circuit 24 is branched from a location upstream of the filtration tank 22 via the three-way valve 26, and the backwash circuit via a three-way valve 25 at a location downstream of the filtration tank 22. 30 is connected.
The backwash circuit 30 includes a governor 27 for a constant flow rate, a safety valve 40 for preventing water pressure higher than a predetermined water pressure from being applied to the filtration tank, and water in the backwash circuit 30 for preventing freezing. Drainage
41 is provided, and a drain plug (not shown) is provided at the end of the drainage channel 41.

36 is an air supply pipe connected to each bubble ejector 35, and the flow rate is controlled by an air amount control valve 37.

The bubble bath reheating device is provided with an operation device (not shown), and the operation device is provided with an operation switch, an automatic switch, a bubble bath operation switch, and the like. Further, the bubble bath reheating device has a central processing unit (CPU) in the control unit, which performs operations such as water level setting, hot water filling, reheating, and the like, and a circulation circuit 2 after the operation switch is turned on.
Before the backwashing operation, the backwashing operation of the filtration tank 22 is performed, and before the backwashing operation, an amount of water equal to or less than the volume of the tank 22 is supplied and left for a predetermined time. It is controlled by a microcomputer.

Next, the operation of the bubble bath reheating device will be described with reference to the flowchart of FIG.

After the operation switch of the operation device (not shown) of the bubble bath reheating device is pressed (S1), the automatic switch is pressed (S2).
Then, it is determined whether or not the circulation pumps 5 and 21 are driven (S3), and at the same time, whether or not the hot water is supplied from the hot water supply branch circuit 11 to the shower or the currant is the other plug use state. It is determined from the 13 detection values (S4).

When the circulation pumps 5 and 21 are not driven and the other plug is not used, the backwash circuit 30 and the hot water supply circuit 3 can be connected to each other, and hot water is supplied from the hot water supply circuit 3 to the filtration tank. It is possible. Therefore, after the flow control valve 14 is fully closed (S5), the reheating circuit 4 side of the three-way valve 16 is closed (S5).
6), the hot water supply circuit 3 and the backwash circuit 30 are connected, and the three-way valve 2
5 and 26 are closed on the circulation circuit 2 side (S7). Then, while opening the drop opening / closing valve 19 (S8),
The flow control valve 14 is driven to the open side (S9). Then, the water (or hot water) from the hot water supply circuit 3 passes through the backwash circuit 30 and the filtration tank.
Enter within 22. The amount of water (or hot water) supplied at this time is detected by the flow sensor 17 and counted (integrated). Then, when this count value matches a predetermined water amount equal to or less than the volume of the filtration tank 22 (for example, 70% of the volume), (S1
0), the flow control valve 14 is fully closed (S11), the drop opening / closing valve 19 is closed (S12), the supply of water (or hot water) to the filtration tank 22 is completed, and this state is maintained for a predetermined time. Left in.

Since the amount of water (or hot water) supplied to the filtration tank 22 is less than or equal to the volume of the filtration tank 22, even if there is no water in the filtration tank 22 and the filter beads adhere to form a lump, this lump is reversed. Drainage circuit for washing
It is never emitted from 24. Further, this lump is crushed by the supply water (or hot water) colliding with the tank wall. Further, after the water (or hot water) is supplied, it is left for a predetermined time to decompose the adhered scale, and the filter beads are returned to the original fine state.

Subsequently, the three-way valve 16 is closed on the backwash circuit 30 side (S13),
The hot water supply circuit 3 and the reheating circuit communicate with each other, and thereafter, the operation of dropping (hot water supply) to the set water level of the bathtub 1 is performed.

Next, when the bubble bath operation switch is pressed, the circulation pump 5 is driven, the three-way valve 25 is controlled so that the backwash circuit 30 side and the filtration tank 22 side are communicated, and the three-way valve 26 is filtered. And the backwash drain circuit 24 are controlled to communicate with each other. At the same time, the air amount control valve 37 of the air supply pipe 36 connected to the bubble ejector 35 is opened, and bubbles are mixed in the jet jet discharged into the bath 1 to form a bubble bath. Furthermore, the three-way valve 16 connects the hot water supply circuit 3 and the backwash circuit 30, and the drop opening / closing valve 19 is controlled to open so that the backwash of the filter tank 22 precedes the filtration for a predetermined time (for example, 0.5 minutes). Only done.
At this time, since the filter beads in the filter tank 22 have been finely decomposed due to the adherence due to the scale during the dropping operation as described above, the backwash water can pass through the gaps between the filter beads and the beads are discharged. There is no such thing. In addition, dirt such as scales in the gap between the beads is discharged together with water from the backwash drain circuit 24, and the malodor in the filtration tank 22 is eliminated.

Thereafter, the three-way valve 25 is controlled so that the filtration tank 22 side and the pump supply side of the circulation circuit 2 are connected to each other, and the three-way valve 26
Is controlled so as to close in the direction of the backwash drainage circuit 24, and the filtering operation is performed. However, even at this time, the bath is still in a bubble bath, and hot water is sucked into the circulation circuit 2 from the bathtub 1,
It is divided into one flowing into the filtering circuit 23 and one discharged into the bathtub 1. The hot water flowing to the filtration circuit 23 passes through the filtration tank 22,
After removing fine dirt such as scales from the bath water, the circulation circuit 2 is returned to the suction side of the pump 5 again. Since the bad odor in the filter tank 22 is removed by the backwash operation, it does not drift into the bath 1.

Then, after the filtration operation is performed for a predetermined time (for example, 5 minutes), the backwash operation is again performed for a predetermined time (for example, 2 minutes).
Until the bubble bath operation switch is turned off, the filtering operation and the backwashing operation are alternately performed as described above, and the bathtub 1 is always in the bubble bath.

In the above embodiment, during the dropping operation usually performed before the bubble bath operation, the operation of supplying water (or hot water) in the filtration tank 22 in an amount equal to or less than the volume of the tank 22 is performed. The operation may be performed prior to the backwashing operation performed before the filtering operation during the bubble bath operation.

(Effects of the Invention) As described above, the filter device of the present invention is
A backwashing operation is performed in which the backwashing water is made to flow back from the backwashing circuit to the filtration tank to the drainage circuit for backwashing before the operation of filtering the hot water flowing in the circulation circuit, and further before the backwashing operation. Since a control unit for performing an operation of supplying an amount of water equal to or less than the volume of the tank is provided in the filtration tank, the bad odor in the filtration tank is removed before the filtering operation and the bather's discomfort is eliminated, The filter beads will not be discharged to the outside of the filter tank during the backwashing operation.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram showing an embodiment of the present invention, and FIG. 2 is a flowchart of a main part sequence according to the embodiment of the present invention. 1 …… Bath 2 …… Circulation circuit 22 …… Filtration tank 23 …… Filtration circuit 24 …… Backwash drainage circuit 30 …… Backwash circuit

Continuation of front page (51) Int.Cl. ⁵ Identification number Internal reference number FI Technical indication location F24H 9/00 W (72) Inventor Keiichi Bandai 32 Akashi-cho, Chuo-ku, Kobe-shi, Hyogo Stock company Noritsu ( 72) Inventor Nishiichiro, 32, Akashi-cho, Chuo-ku, Kobe, Hyogo Prefecture Incorporated Noritsu (72) Inventor, Kazuhiro Kimura, 32, Akashi-cho, Chuo-ku, Kobe, Hyogo Prefecture (72) Inventor, Nobuchi Masaya Naoto Noda, Examiner, Noritsu Co., Ltd., 32 Akashi-cho, Chuo-ku, Kobe-shi, Hyogo Prefecture

Claims (1)

[Claims] 1. A circulation circuit for circulating hot water in a bathtub, a filtration circuit having a filtration tank filled with filtration beads therein and connected to the circulation circuit, and a filtration circuit upstream of the filtration tank. And a backwashing circuit connected to a filtration circuit on the downstream side of the filtration tank,
A backwashing operation is performed in which the backwashing water is made to flow back from the backwashing circuit to the filtration tank to the drainage circuit for backwashing before the operation of filtering the hot water flowing in the circulation circuit, and further before the backwashing operation. A filtering device comprising a control unit for supplying water in an amount equal to or less than the volume of the filtering tank and allowing it to stand for a predetermined time.