JPH0615124A - Filter device for bath - Google Patents

Abstract

PURPOSE:To maintain a filter always in a backwashing state at the time of starting a forced circulation action and to enable the execution of the backwashing on the spot by this forced circulation operation by executing the backwashing action for a specified period of time by a backwashing controller when a forced circulation action end signal is inputted. CONSTITUTION:A stop valve 14 is closed and the operation of a circulation pump P stops when the operation stop of a bubble bath is operated. A three-way valve 31 and a three-way valve 32 are set at backwashing postures by this signal, and thereafter, a water feeding valve 33 is opened to maintain this state for the specified period of time. As a result, the city water supplied from a water feeding circuit 3a flows backward through the filter 20 and is discharged from a draining circuit 3b. The water feeding valve 33 is closed and the postures of the three-way valve 31 and the three-way valve 32 restore the original state so as to wait for the next run operation of the bubble bath after the backwashing action continues for the specified period of time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bath filtration device, and more particularly to backwashing (hereinafter called backwashing) of a filter inserted in a circulation circuit for circulating hot water in a bathtub.

[0002]

2. Description of the Related Art In a bath device such as a bubble bath, a filter is inserted in a circulation circuit for circulating hot water in the bath.
And in a simple bubble bath, a circulation pump is inserted in this circulation circuit, and the forced circulation force of this makes it suck air.
Circulating water is discharged from the discharge port provided in the bathtub together with suction air to generate bubbles.

During this forced circulation, the circulating hot and cold water is filtered by the filter. However, in this bubble bath device, since the circulation operation is frequently executed, the filtering ability of the filter is lowered and the cost is low. Further, if the filter is left for a certain period of time while being filtered, it may cause an offensive odor. Therefore, in order to recover the filtration capacity and prevent the generation of the bad odor, a method of giving a circulation flow to the filter in the direction opposite to the circulation direction during normal operation, that is, a method of performing so-called backwashing at a predetermined timing is known. It is proposed in Japanese Examined Patent Publication No. 4-28283.

In this prior art, during the backwash, clean tap water is introduced from a water circuit communicating with the circulation circuit and the backwash water passing through the filter is discharged to the outside. A method of executing the washing operation for a certain period of time before starting the bubble bath operation is adopted. Therefore, when the bubble bath operation is started after a certain period of time after the bubble bath operation operation, the filter is always in the back-washed state and the filtering ability is restored. Further, it is possible to prevent the generation of a bad odor.

However, in this prior art, since the backwashing operation is always executed prior to the start of the bubble bath operation, a certain waiting time occurs during the bubble bath operation, which is inconvenient. The present invention has been made in view of such a point, and "A filter circuit having a filter is connected to a circulation circuit connected to a bath, and a backwash circuit is connected to the filter circuit to perform backwash. In a bath filtration device in which tap water is allowed to flow back to the filtration circuit during operation and is discharged to the outside, this forced circulation operation is executed promptly during forced circulation operation such as bubble bath operation, and filtration is started at the start of execution. The task is to ensure that the filter of the circuit is always backwashed.

[0006]

[Technical Means] The technical means of the present invention taken to solve the above-mentioned problem is "provided with a backwash control device for performing backwash operation for a certain period of time when a forced circulation operation end signal is input".
That is.

[0007]

When the forced circulation operation end signal is input, the backwash control device executes the backwash operation for a certain period of time. Therefore, at the time of the next forced circulation operation, the filter is always in the backwashed state.

[0008]

[Effect] When the forced circulation operation is started, the filter is always in the back-washed state, and the forced circulation operation immediately executes the forced circulation operation, thus eliminating the conventional waiting time. Furthermore, since the backwashing operation is executed after the forced circulation is completed, even if the hot water in the bathtub is drained after the final forced circulation operation, the filter is still backwashed at this time, so The inconvenience of being left without backwashing can be eliminated.

[0009]

EXAMPLE This example was carried out in a bubble bath apparatus, and has an overall configuration as shown in FIG. Circulation circuit 1 consisting of forward path 1a and return path 1b connected to bathtub B
A circulation pump P is inserted in the inside. The discharge side of this pump is branched into a circuit to the heat exchanger 11 for forced circulation heating, and the downstream side of this heat exchanger 11 joins the outward path 1a of the circulation circuit 1. Further, a mouthpiece 12 for bubble generation is attached to a connection portion of the circulation circuit 1 at a downstream end of the outward path 1a with the bath B, and an air suction circuit 13 is connected to the mouthpiece 12.

A filter circuit 2 is formed by inserting a filter 20 in parallel with the circulation circuit 1. The outlet side of the filter 20 is connected to the inlet side of the circulation pump P, and the inlet side of the filter 20 is circulated. It is connected to the outlet side of the pump P. Filtration circuit 2
A hot water filling circuit 3a from the water heater 4 is connected to the outlet side of the filter 20 via a three-way valve 31. Meanwhile, the filter
A drainage circuit 3b is connected to the inlet side of 20 through a three-way valve 32, and its downstream end faces a drainage channel outside the device.

Therefore, the water filling valve inserted in the water filling circuit 3a
A posture in which 33 is opened and the three-way valve 31 is communicated with the circulation pump P side to shut off the filter 20 side (hereinafter, referred to as a water filling posture)
When set to, the water heater 4
The bathtub B is filled with water. Then, when the amount of stored hot water in the bathtub B reaches a predetermined value by the output of the control device including the water level detecting means (not shown) and the like, the filling operation is automatically stopped. In addition, the three-way valve 31 filters the water filling circuit 3a side.
The three-way valve 32 disconnects the circulation pump P side and connects the drainage circuit 3b side and the filter 20 to each other by taking a posture in which the circuit is connected to the circulation pump P side and cut off the circuit to the circulation pump P side (hereinafter referred to as a backwash posture). When brought into the connected posture (hereinafter, referred to as backwash posture), the backwash circuit is configured. Therefore, when the water filling valve 33 is opened in this state, the inside of the filter 20 is backwashed. At this time, the water heater 4
Is operating, the filter 20 is backwashed with hot water.

In this embodiment, the hot water in the bathtub B is circulated through the circulation circuit 1 by the operation of the circulation pump P, and the bathtub B is heated by the heat exchanger 11 during the reheating operation.
The hot water inside is circulated and heated. Also, when operating the bubble bath,
With the circulation pump P in the operating state as described above, the on-off valve 14
When the valve is opened, the air sucked through the air suction circuit 13 is mixed with the water discharged to the bath B in the mouthpiece 12, and the bubble bath operation state is set.

When the open / close valve 14 is kept closed and the circulation pump P is operated to burn the burner corresponding to the heat exchanger 11, the reheating operation is executed. Each of the above operations can be selected by operating the remote control operation panel. Further, the above-mentioned backwashing operation is configured to be executed by the backwashing control device each time the bubble bath operation is completed. In this embodiment, the backwashing control device is configured as shown in the flowchart of FIG. A microcomputer that executes the control operation based on the above is adopted.

This operation will be described with reference to FIG. In a state other than backwashing, the three-way valve 31 is set in a posture in which the filter 20 side and the circulation pump P side are communicatively connected (hereinafter referred to as a normal posture), and the three-way valve 32 is set in the filter 20 side and the circulation pump P. It is set in a posture (hereinafter, referred to as a normal posture) in which the side is connected for communication. When the bubble bath is operated, the circulation pump P is put into an operating state, and at the same time, the opening / closing valve 14 is opened. As a result, bubbles are ejected from the mouthpiece 12 into the bathtub B by the above action.
At this time, the circulation circuit P also brings the filtration circuit 2 into a circulation state. Therefore, a part of the circulating water of the hot water in the bathtub B is filtered by the filter 20.
Will always be filtered.

When the bubble bath operation is stopped, the on-off valve 14 is closed and the operation of the circulation pump P is stopped at the same time. The signal at this time sets the three-way valve 31 and the three-way valve 32 to the backwash posture, and then the water filling valve 33 is opened to maintain this state for a certain period of time. As a result, the tap water supplied from the water filling circuit 3a flows backward through the filter 20 and is discharged from the drain circuit 3b. Therefore, in this embodiment, the water filling circuit is
A circuit in which the 3a and the drainage circuit 3b are communicated with each other via the three-way valve 31 and the three-way valve 32 is a backwash circuit.

When this backwashing operation continues for a certain period of time, the water filling valve 33 is closed and the postures of the three-way valve 31 and the three-way valve 32 are set to the original state, that is, the normal posture, and the next bubble bath is set. Wait for driving operation. Then, when the next bubble bath operation is performed, the above bubble bath operation is executed as it is without waiting time, and after this operation is completed, a backwash operation is executed and then a standby state is set.

In the above embodiment, the backwashing operation is executed only when the bubble bath operation is finished, but the backwashing operation may be executed even when the reheating operation is finished. Further, irrespective of any of these forced circulation operations, when the number of forced circulation operations reaches the set number, the backwash operation may be executed at the end of the final forced circulation operation.

In the above embodiment, the circulation circuit for reheating is always connected during the bubble bath operation, and moreover,
Although a common circulation pump P is used to bring the circuit into a water-passing state, as shown in FIG. 3, the reheating circulation circuit 1c is provided with a reheating circulation pump P ₂ separate from the bubble bath circulation pump P ₁ By inserting the reheating circuit 1c at the confluence of the inlet side of the recirculation circuit 1c and the circulation circuit 1 and at the confluence of the outlet side of the circulation circuit 1c and the circulation circuit 1 during the reheating operation and the bubble bath operation. The three-way valves 16 and 17 for switching the mode to a predetermined state may be inserted.

In this case, the capacity of the circulation pump P ₁ for the bubble bath is set to be large, and the capacity of the circulation pump P ₂ for additional heating is set to be relatively small. Normally, the amount of circulating hot water during the reheating operation is relatively small, so that the amount of circulating hot water during the reheating operation does not become excessive compared to the case of FIG. In other words, the amount of circulating hot water can be set to suit both operating conditions during both operations.

[Brief description of drawings]

FIG. 1 is an overall schematic explanatory view of an embodiment of the present invention.

FIG. 2 is a flowchart of a control device that controls a backwash operation.

FIG. 3 is a schematic explanatory view of another embodiment.

[Explanation of symbols]

 B ... Bathtub 2 ... Filtration circuit 20 ... Filtration device

Claims (1)

[Claims] 1. A circulation circuit connected to a bathtub is connected to a filtration circuit equipped with a filtration device, and a backwash circuit is connected to this filtration circuit. During backwash operation, tap water is allowed to flow back to the filtration circuit to externally. A bath filtration device provided with a backwash control device for performing a backwash operation for a certain period of time when a forced circulation operation end signal is input to the bath filtration device.