JPH0646388Y2 - Filter clogging detection device in bathtub - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is to detect a clogging of a filter, which automatically gives an alarm when the filter mesh provided in the circulation passage of the bathtub is clogged. It relates to the device.

[Conventional technology]

Although various shapes and materials are used for the filters provided at the connection between the water tank and the suction and drain pipes, the filters used for domestic and commercial water tanks (for example, bathtubs) are simple and easy to maintain. Inance is required to be easy.

For this reason, a filter used in a bathtub or the like is generally of a type in which water or hot water is passed through to filter foreign matters.

FIG. 2 is a schematic system diagram showing a forced circulation type bath.

The hot water in the bathtub 1 passes through the filter 2, is sucked into the pump 4 via the water absorption pipe 3, is heated by the burner 6 when passing through the heat exchanger 5, is refluxed into the bathtub 1 through the connection fitting 7, and is circulated. To do.

FIG. 3 is a schematic system diagram of a bubble bath.

Hot water in the bathtub 1 passes through the filter 2, is sucked and discharged by the pump 4 through the water absorption pipe 3, is mixed with bubbles by the bubble bath nozzle 8, and is jetted into the bathtub 1 as indicated by an arrow a.

[Problems to be solved by the device]

Like the hot water and water in the bathtub illustrated above, foreign matter such as hair is floating in the hot water and water that touch the human body.

When this type of foreign matter is filtered and removed by a filter, clogging due to the foreign matter progresses with use and pressure loss increases.

For this reason, when the clogging of the filter progresses to such an extent that the pump performance is adversely affected, the filter must be washed and filtered to remove the trapped foreign matter.

However, since it is difficult to identify the degree of clogging of the filter from the outside, development of a clogging sensing device is desired.

2. Description of the Related Art A filter used in industrial production equipment or a prime mover is provided with a differential pressure gauge to detect clogging.

However, in the case of the filter provided in the circulation flow path of the bathtub, it is not desirable to complicate the structure and increase the price by installing the differential pressure gauge.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a device capable of automatically detecting clogging of a filter and issuing an alarm without providing a differential pressure gauge for detecting a differential pressure across the filter. And

[Means for Solving the Problems]

In order to achieve the above object, the present invention utilizes a pressure type water level gauge originally provided for bath equipment.

That is, in the forced circulation type bath of the conventional example shown in FIG. 2, the safety device is such that the pump 4 does not operate unless hot water is supplied to the bathtub 1 and the water level becomes higher than the connecting fitting 7. (Not shown) is provided, and a pressure sensor (not shown) for detecting the water level in the bathtub is used.

Similarly, in the bubble bath shown in FIG. 3, a safety device (not shown) is provided so that the pump 4 does not operate unless hot water is supplied to the bathtub 1 and the water level becomes higher than the bubble bath nozzle 8. Is provided, and a pressure sensor (not shown) for detecting the water level in the bathtub is used.

In the present invention, the pressure sensor for detecting the water level in the bathtub is also used for detecting clogging of the filter, and when the filter is clogged, the alarm is automatically activated.

For this reason, the present invention provides a water absorption chamber that penetrates through a wall of a bathtub, a filter net that is installed to cover the inlet opening of the water absorption chamber, and a suction port that opens into the water absorption chamber and pumps the water absorption chamber. In a bathtub filter having a water absorption pipe connected to the mouth, the detection pipe of the water level detection pressure switch of the bathtub is installed with the pressure detection port facing the inner wall of the water supply chamber opposite to the opening of the water absorption pipe, When the pump is driven, there is a pressure switch connected to the pressure detection tube.It is equipped with an automatic alarm means that activates an alarm when it detects a set pressure loss, and the pressure switch for detecting the water level in the bathtub is also used for detecting clogging of the filter. It is characterized by having done.

[Action]

According to the above configuration, when the pump is not operating,
There is no water flow through the filter, so the pressure sensor can detect the water level.

If the filter is clogged in the state where the pump is operating and the circulating water flow passing through the filter is generated, the pressure on the downstream side of the filter is reduced according to the degree of the clog.

Therefore, with the above configuration, when the pressure sensor detects a certain set pressure loss, an alarm can be issued, and this alarm can notify that the filter is clogged.

As described above, if the pressure sensing port of the pressure sensing pipe faces the inner wall of the water absorbing chamber on the side opposite to the water absorbing pipe, the filter will be clogged even if the pump operates and hot water flows in the water absorbing chamber. Unless it is not, the pressure sensor can detect the water level without being affected by the dynamic pressure of the hot water, and can detect the pressure loss due to the clogging of the filter.

〔Example〕

Next, an embodiment of the clogging detection device for a filter according to the present invention will be described with reference to FIG.

FIG. 1A is a diagram in which a control system diagram is added to the vertical cross-sectional view of the embodiment.

A water absorption chamber 14 is fixed to the water bath 1 through the wall of the bathtub 1, and one end of a water absorption pipe 16 is opened in the water absorption chamber 14. The other end of the water suction pipe is connected to a suction port of a pump (not shown).

The swirl chamber 12 has a cap shape and is detachably attached to the opening of the water absorption chamber 14.

A filter net 15 is installed along the boundary between the swirl chamber 12 and the water absorption chamber 14.

A pressure detecting pipe 21 is provided so as to penetrate the wall of the water absorbing chamber 14, and the pressure detecting port 21a is made to face the water absorbing chamber wall opposite to the water absorbing pipe 16.

That is, in this example, since the water absorption pipe 16 is open to the lower side of the water absorption chamber 14, the pressure detection port 21a is opposed to the upper side of the inner wall of the water absorption chamber 16 (opposite to the opening of the water absorption pipe 16). At least a pressure tube 2
Install 1.

The pressure detecting pipe 21 is connected to the pressure sensor 22, and the signal output of the pressure sensor 22 is input to the microcomputer controller 23.

The microcomputer control unit 23 has an original function of detecting the water level in the bathtub based on the output signal of the pressure sensor 22, and the pressure sensor 22 outputs a signal indicating a set pressure loss. It has a function of activating the alarm device 24 when it does.

The BB cross section shown in FIG. 1 (A) is shown in FIG. 1 (B).

The water suction hole 13 is eccentric with respect to the center line O of the swirl chamber 12. The hot water flowing in as indicated by the arrows b, b ′ swirls as indicated by the arrows c, c ′, so that slender foreign matter such as body hair and fiber debris suspended in the water become entangled with each other to form pills.

However, as the filter net 15 is used for a long period of time, foreign matter (for example, scale) other than the elongated foreign matter is accumulated on the filter net 15, and the clogging gradually progresses.

When the above-mentioned clogging exceeds a certain level, the pressure sensor 22
Generates a signal indicating pressure loss, and the microcomputer control unit 23 receives the electric signal and activates the alarm device 24. This alarm allows the user to detect clogging of the filter.

In the filter of this example, most of the filtered foreign matter is in the form of pills due to the vortex in the vortex chamber, so the cap-shaped vortex chamber 12 can be removed for easy cleaning.

[Effect of device]

As described above, when the filter clogging detection device according to the present invention is applied, the clogging of the filter is detected by using the pressure sensor for detecting the water level in the bath without providing a differential pressure gauge for detecting the differential pressure across the filter. Can be automatically detected and an alarm can be issued.

[Brief description of drawings]

FIG. 1 shows an embodiment of a filter clogging detection device according to the present invention. FIG. 1 (A) is a sectional view with a control system diagram added, and FIG. 1 (B) is BB in the above figure. FIG. FIG. 2 is a schematic system diagram of the forced circulation type bath, and FIG. 3 is a schematic system diagram of the bubble bath. 1 ... Bathtub, 12 ... Whirlpool chamber, 13 ... Water absorption hole, 14 ... Water absorption chamber, 15 ...
Filter mesh, 16 ... Water absorption pipe, 21 ... Pressure detection pipe, 21a ... Pressure detection port, 22 ... Pressure sensor, 23 ... Microcomputer control unit, 24 ... Alarm device.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location B01D 35/143

Claims (1)

[Scope of utility model registration request] 1. A water absorption chamber fitted through a wall of a bathtub,
A filter for a bathtub having a filter net installed to cover an inlet opening of the water absorption chamber and a water absorption pipe opening to the water absorption chamber and connecting the water absorption chamber to a pump suction port, wherein a pressure switch for detecting the water level of the bathtub The pressure detecting tube of the above is installed on the inner wall of the water absorbing chamber on the opposite side of the opening of the water absorbing tube with the pressure detecting port facing the pressure measuring tube, and the pressure loss connected to the pressure detecting tube is set during driving of the pump. An apparatus for detecting clogging of a filter in a bathtub, which is provided with an automatic alarming means for activating an alarming device when the above condition is detected, and the pressure switch for detecting the water level of the bathtub is also used for detecting the clogging of the filter.