JPH0780225A - Automatic backflow cleaning method of hot water supply device of bathtub, etc., and device therefor - Google Patents

Abstract

PURPOSE:To cause dust caught by a hair catcher to be discharged to an outer area by flowing hot water passing through the hair catcher back temporarily in a pump unit with the hair catcher formed halfway through a suction pipe leading to a pump from a bathtub. CONSTITUTION:In a pump unit 1 with a hair catcher formed halfway through a suction pipe 4 leading to a pump 3 from a bathtub 2, dust caught by the hair catcher 6 is discharged to an area outside the unit 1 by flowing hot water passing through the hair catcher 6 back temporarily. In addition, a strainer with opening such as threaded groove holes formed on a metal plate is mounted on the hair catcher 6. In addition, a cloth filter is attached on the hair catcher 6. Consequently, it is possible to discharge dust sticking to the strainer and the filter to an area outside the unit, and also clean and remove dust with the strainer and the filter installed as they are in the unit. Thus labor for maintenance inspection and cleaning can be saved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a bypass for a pump and a washing unit for circulating hot water in a large tub such as an inn, an employee dormitory, a pool, etc., to partially reverse the hot water. The present invention relates to a method and an apparatus for regularly and automatically cleaning a unit.

[0002]

2. Description of the Related Art Conventionally, hot water pumps and washing units of this type guide water that has been sucked in from a bathtub to the pump via a hair catcher, and then a filter case,
The purified hot water is returned to the bathtub via the activated stone case. The hair catcher is generally one with a stainless steel strainer inside the container, but in this case the hair catcher often causes clogging, so
The unit had to be shut down regularly and the hair catcher filters had to be cleaned or replaced.

[0003]

Originally, a hair catcher has a simple structure in which dust is collected by a strainer made of a metal plate in which a large number of grooved holes, round holes and the like are provided in a container, and hair contained in hot water is used. Although it is intended to capture coarse dust, cleaning or replacing the strainer of the hair catcher stops the unit, opens the hair catcher lid, removes the strainer, scrapes tangled dust, etc. Work is required. However, these debris can be easily removed not only by attaching a strainer to the hair catcher, but by attaching a filter and backflowing the water passing through the hair catcher. Therefore, in the present invention, the hot water around the hair catcher is temporarily made to flow backward, and the dust on the filter is automatically discharged together with the flowing water to the outside of the unit.

[0004]

DISCLOSURE OF THE INVENTION The present invention relates to a pump unit having a hair catcher provided in the middle of a suction pipe leading from a bathtub to a pump, by temporarily flowing back hot water passing through the hair catcher. The present invention relates to a method for automatically backwashing a hot water supply device such as a bathtub, in which dust adhered to the outside of the unit is discharged.

Further, according to the present invention, in a pump unit having a hair catcher provided in the middle of a suction pipe leading from a bathtub to a pump, the suction pipe is branched via an electric valve, and the pump is directly connected without passing through the hair catcher. A side flow pipe connected to the suction pipe is provided, the discharge pipe of the pump is branched via an electromagnetic valve, the other end of the branch pipe is communicated with the discharge pipe side of the hair catcher, and the suction pipe side of the hair catcher is connected. The present invention relates to an automatic backwashing apparatus that enables a backwashing method of the above hair catcher by branching to provide a discharge pipe and a motorized valve at the time of backwashing and further providing a motorized valve in the middle of the connecting pipe from the hair catcher to the pump. .

Further, in the present invention, in the above automatic backwashing apparatus, the hair catcher is composed only of a strainer having a large number of grooves and holes formed in a metal plate body, or is stretched inside the catcher. It is characterized in that it is composed of only a furnace cloth filter.

Furthermore, the present invention is characterized in that, in the above-mentioned automatic backwashing apparatus, a cloth filter is provided which is stretched inside the strainer and is connected to the bottom of the strainer by a furnace cloth presser. The filter may be composed of a cloth filter and a cross filter which are stretched between double strainers and which are connected to the bottom of the strainer by a furnace cloth presser.

[0008]

Since the present invention is constructed as described above, hot water is normally sent from the bathtub through the suction pipe, the hair catcher, the connecting pipe, and the pump to the next washing unit and then sent again to the bathtub to complete the circulation. However, when it is desired to remove dust from the hair catcher, the electric valve of the suction pipe is automatically activated temporarily or at regular intervals to introduce hot water from the bathtub directly into the suction pipe of the pump through the side flow pipe, The hot water that has been made high pressure by the pump is sent to the branch pipe through the solenoid valve of the pump discharge pipe, and the high pressure hot water is sent from the discharge pipe side of the hair catcher to float the dust adhering to the strainer and the filter, and from the suction pipe of the hair catcher. The electrically operated valve is opened and sent to the branch pipe to discharge the dust together with the high pressure hot water to the outside of the pump unit. At this time, the electric valve provided in the middle of the connecting pipe from the hair catcher to the pump is closed to shut off the flow from the hair catcher to the pump.

[0009]

FIG. 1 shows an embodiment of the present invention. The pump unit 1 includes a hair catcher 6 having a coarse cloth filter 5 built in a suction pipe 4 leading from a bath 2 to a pump 3.
To provide. Before the hair catcher 6, the suction pipe 4 is branched via a three-way electric valve 7, and a side flow pipe 8 is provided which is directly connected to the suction pipe of the pump without passing through the hair catcher.
Further, the discharge pipe 9 of the pump 3 is branched via the three-way motorized valve 10, and the other end of the branch pipe 11 is communicated with the discharge pipe 12 side of the hair catcher 6. Further, the suction pipe 13 side of the hair catcher 6 is branched to provide a discharge pipe 14 for backwashing and a two-way electric valve 15. Furthermore, the two-way motorized valve 17 is also provided in the middle of the connecting pipe 16 from the hair catcher 6 to the pump 3.
To provide. A filter case 18 and an activated stone case 19 are arranged in the discharge pipe 9 of the pump unit 1.

During normal hot water circulation, the hot water discharged from the bath 2 is sent to the pump unit 1 and the next filter case 18 via the hair catcher 6 and the pump 3.
The warm water sent to the activated stone case 19 and purified via these is returned to the bathtub 2 again. After normal operation for a certain period of time, the time when dust is accumulated in the hair catcher 6 and the function of the catcher is deteriorated is detected by an empirical rule or by a detection means, and the three-way electric valve 7 is operated by a signal from the controller to suck the suction pipe. The hot water of No. 4 is sent directly to the pump 3 via the side flow pipe 8. Three-way solenoid valve 10 on the discharge pipe 9 side of the pump 3
Also actuated by the control signal at the same time to send the pressurized hot water that should originally be sent to the filter case 18 to the branch pipe 11, and send the pressurized hot water from the discharge pipe side of the hair catcher 6 to the back side of the filter 5 of the hair catcher 6.

The dust accumulated on the strainer and the filter during normal hot water circulation is released from the filter 5'pushed up as shown in FIG. 3, and discharged toward the suction pipe 13 of the hair catcher 6 together with the pressurized hot water. The control signal also causes the two-way motorized valve 15 to be in the open position.
The dust is discharged to the outside of the unit through the discharge pipe 14 at the time of backwashing with pressurized hot water. Further, in this case, in order to ensure the reverse flow in the unit, the two-way electric valve 17 in the middle of the connecting pipe from the hair catcher 6 to the pump 3 is closed. When the dust accumulated on the strainer or filter 5 of the hair catcher 6 is removed, each motorized valve 7,
10, 15 and 17 are simultaneously switched to the original state by the control signal, and normal hot water circulation is restarted.

In FIG. 4, the strainer in the hair catcher has a double structure, and a cloth filter 5'and a coarse mesh cloth filter 5 "are stretched between the two, which are connected to the bottom of the strainer by a furnace cloth retainer 20. Shows a hair catcher, in which case not only coarse dirt but also fine dirt such as hot water contained in warm water can be collected, and when the filter is pushed up by the backflow water, the range is covered by the furnace cloth retainer and strainer. Therefore, the strainer can be prevented from accidents such as breakage. The strainer is connected to the catcher upper lid by the pressing rod 21. Further, the upper lid is provided with the air vent hole 22.

[0013]

As described above, according to the present invention, the pump unit of the hot water circulation system is provided with the side flow pipe, the branch pipe, and the backwash washing / discharging pipe, and these pipe lines are controlled by two three-way motor valves and two two-way motor valves. By temporarily backflowing hot water that passes through the strainer and filter of the hair catcher, dust adhering to the strainer and filter can be discharged to the outside of the unit, and cleaning and cleaning can be performed with the strainer and filter installed inside the device. Since it is possible to remove dust,
Economical labor saving for continuous use of the bathtub and maintenance / inspection / cleaning of strainers that people dislike.

Further, since the hair catcher is provided with the filter as well as the strainer, finer dust can be collected, and these dusts can be easily removed by the backflow water. Furthermore, if the filter has a dual structure of cloth filter and cross filter, and it is sandwiched between the strainers that are doubled, the effect of collecting dust by the catcher is improved and the removal by backflow water is easy. Becomes
The filter can be used continuously for a long period of time.

[Brief description of drawings]

FIG. 1 is a schematic diagram schematically showing a hot water circulation system according to the present invention.

FIG. 2 is a sketch drawing showing the arrangement of pipes and motor-operated valves in the pump unit of the hot water circulation system according to the present invention.

FIG. 3 is a cross-sectional view showing the inside of the hair catcher during normal cleaning and backwashing.

FIG. 4 is a cross-sectional view showing the inside of a hair catcher in which a strainer is doubled and a cloth filter and a cross filter are stretched between them.

[Explanation of symbols]

 1 pump unit 2 bathtub 3 pump 4 suction pipe 5 strainer or filter 5'cloth filter 5 "cross filter 6 hair catcher 7 three-way electric valve 8 side flow pipe 9 discharge pipe 10 three-way electric valve 11 branch pipe 12 discharge pipe 13 suction pipe 14 Backflow cleaning discharge pipe 15 Two-way electric valve 16 Connection pipe 17 Two-way electric valve 18 Filter case 19 Activated stone case 20 Furnace cloth presser 21 Presser bar 22 Air vent hole

Continuation of the front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display area F24H 9/00 W

Claims (6)

[Claims] 1. In a pump unit in which a hair catcher is provided in the middle of a suction pipe leading from a bathtub to a pump, hot water passing through the hair catcher is temporarily flowed back to remove dust adhering to the hair catcher from the unit. A method for automatically backwashing a hot water supply device such as a bathtub, which is characterized by discharging. 2. A pump unit in which a hair catcher is provided in the middle of a suction pipe leading from a bathtub to a pump, the suction pipe is branched via an electric valve, and is directly connected to the suction pipe of the pump without passing through the hair catcher. A side flow pipe to be connected is provided, the discharge pipe of the pump is branched via an electromagnetic valve, the other end of the branch pipe is connected to the discharge pipe side of the hair catcher, and the suction pipe side of the hair catcher is branched. An automatic backwashing device for a hot water supply device such as a bathtub, which is provided with a discharge pipe and a motorized valve for backwashing, and further has a motorized valve in the middle of a connecting pipe from the hair catcher to the pump. 3. The automatic backwashing apparatus according to claim 2, wherein the hair catcher includes a strainer in which a large number of openings such as groove holes are provided in a metal plate body. 4. The automatic backwashing apparatus according to claim 2, wherein the hair catcher includes a cloth filter. 5. The automatic backwash as claimed in claim 2, wherein the hair catcher comprises a cloth filter which is stretched inside the strainer and is connected to the bottom of the strainer by a furnace cloth presser. apparatus. 6. The hair catcher comprises a cloth filter and a cross filter which are stretched between double strainers and which are connected to the bottom of the strainer by means of a furnace cloth presser. The automatic backwashing apparatus according to claim 2.