JP2660371B2 - Bath filtration equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter for a bath, and more particularly to a backwash for a filter inserted into a circulation circuit for circulating hot water in a bathtub.

[0002]

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

[0003] During the forced circulation, the circulating hot water is filtered by the filter. However, in this bubble bath apparatus, since the circulating operation is frequently performed, the filtering ability of the filter is reduced and the bubble bath is inexpensive. Leaving the filter that has been performing the filtering operation for a certain period of time may cause odor. Therefore, in order to restore the filtration capacity and prevent the generation of the offensive odor, a method of performing a so-called backwash at a predetermined timing by applying a circulating flow to the filter in a direction opposite to a circulating direction in a normal operation is provided. It is proposed in Japanese Patent Publication No. 4-28383.

[0004] In this prior art, in the case of the backwash, clean tap water is introduced from a water circuit connected to a circulation circuit, and the backwash water passed through a filter is discharged to the outside. A method of performing the washing operation for a certain period of time before starting the bubble bath operation is employed. 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 backwashed state, and the filtering ability is restored. Further, the generation of offensive odor can be prevented.

However, in the prior art, since the backwashing operation is always performed 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 the above point, and is described as follows: "A filtration circuit having a filter is connected to a circulation circuit connected to a bathtub, and a backwash circuit is connected to the filtration circuit, In operation, a bath filtration device in which washing water different from the hot water in the circulation circuit is caused to flow back to the filtration circuit and discharged to the outside, '' It is an object of the present invention to perform the operation without changing the flow rate and to ensure that the filter of the filtration circuit always has a certain or more filtering capability at the start of the operation.

[0006]

The technical means of the present invention taken to solve the above-mentioned problem is that "the number of operations of the circulating circuit in which the use of the filtering circuit is performed in parallel reaches a predetermined number and the final circulating circuit is used. In response to the input of the end signal of the circuit operation,
A backwash control device for executing the backwash operation for a predetermined time is provided. "

[0007]

The number of times of operation of the circulation circuit in which the use of the filtration circuit is performed in parallel reaches a predetermined number of times, and in response to the input of a final end signal of the operation of the circulation circuit, the backwashing control device keeps a constant value. A time backwash operation is performed. Therefore,
The filtration capacity of the filter during the forced circulation operation is maintained. In addition, since the backwash operation is not performed during the forced circulation operation, the circulation flow rate does not change.

[0008]

When the forced circulation operation is started, the forced circulation operation is immediately performed by the forced circulation operation, so that the waiting time unlike the conventional case is unnecessary. Further, the number of operations of the circulation circuit in which the use of the filtration circuit is performed in parallel reaches a predetermined number, and the backwash operation is performed in response to input of a final end signal of the operation of the circulation circuit. Therefore, the filtration performance of the filtration circuit is maintained, and a comfortable filtration operation can be performed. In addition, since the circulation flow rate does not change during the circulation operation, the user can take a bath without feeling discomfort due to the flow rate change.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS This embodiment is implemented in a bubble bath apparatus and has an overall configuration as shown in FIG. Circulation circuit 1 consisting of outbound 1a and inbound 1b connected to bathtub B
A circulation pump P is inserted therein. The discharge side of the pump is branched into a circuit to a heat exchanger 11 for forced circulation heating, and the downstream side of the heat exchanger 11 joins the outward path 1a of the circulation circuit 1. Further, a base 12 for generating bubbles is attached to a connection portion of the circulation circuit 1 at the downstream end of the forward path 1a and the bathtub B, and an air suction circuit 13 is connected to the base 12.

A filtration circuit 2 having a filter 20 inserted in parallel with the circulation circuit 1 is formed. An outlet of the filter 20 is connected to an inlet of a circulation pump P, and an inlet of the filter 20 is circulated. Connected to the outlet side of pump P. Filtration circuit 2
The filling circuit 3a from the water heater 4 is connected to the outlet side of the filter 20 via the three-way valve 31. Meanwhile, the filter
A drain circuit 3b is connected to the inlet side of 20 via a three-way valve 32, and the downstream end faces a drain channel outside the device.

Therefore, the filling valve inserted into the filling circuit 3a
A posture in which the valve 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 hot water filling posture).
When the water heater 4 is set to
From the bathtub B. When the amount of hot water stored in the bathtub B reaches a predetermined value by an output of a control device including a water level detecting means (not shown) and the like, the filling operation is automatically stopped. Also, the three-way valve 31 is a filter for the hot water filling circuit 3a.
The three-way valve 32 shuts off the circulation pump P side to connect the drain circuit 3b side and the filter 20 with the position connected to the circulation pump 20 and shutting off the circuit to the circulation pump P side. When the posture is set to the connected posture (hereinafter, referred to as a backwashing posture), a backwashing circuit is configured. Therefore, when the filling valve 33 is opened in this state, the inside of the filter 20 is backwashed. At this time, water heater 4
Is in an operating state, the filter 20 is backwashed by 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 by the heat exchanger 11 during the reheating operation.
The hot water inside is circulated and heated. Also, when driving a bubble bath,
As described above, the circulation pump P is set in the operating state, and the on-off valve 14 is opened.
When the valve is opened, the air sucked through the air suction circuit 13 is mixed with the water discharged to the bathtub B at the base 12, and the bubble bath operation state is set.

When the circulating pump P is operated while maintaining the on-off valve 14 in the closed state, and the burner corresponding to the heat exchanger 11 is brought into a combustion state, a reheating operation is executed. Each of the above operations can be selected by operating the remote control operation panel. Further, the above-described backwashing operation is configured to be performed each time the bubble bath operation is completed by the backwashing control device. In this embodiment, the backwashing control device is configured as shown in the flowchart of FIG. A microcomputer that performs a control operation based on the microcomputer is employed.

This operation will be described with reference to FIG. In a state other than at the time of backwashing, the three-way valve 31 is set to a position (hereinafter referred to as a normal position) in which the side of the filter 20 and the side of the circulation pump P are connected and connected, and the three-way valve 32 is set to the side of the filter 20 and the circulation pump P side. It is set to a posture (hereinafter referred to as a normal posture) in which the sides are connected to each other. When the bubble bath operation is performed, the circulation pump P is operated, and at the same time, the on-off valve 14 is opened. As a result, bubbles are spouted from the base 12 into the bathtub B by the above operation.
At this time, the filtration circuit 2 is also circulated by the circulation pump P. Therefore, a part of the circulating water of the hot water in the bathtub B is
Will always be filtered.

When the bubble bath operation is stopped, the on-off valve 14 is closed, and at the same time, the operation of the circulation pump P is stopped. The three-way valve 31 and the three-way valve 32 are set to the backwashing posture by the signal at this time, and thereafter, the filling valve 33 is opened to maintain this state for a certain period of time. Thus, the tap water supplied from the hot water filling circuit 3a flows back through the filter 20 and is discharged from the drain circuit 3b. Therefore, in this embodiment, the filling circuit
A circuit in which 3a and the drain circuit 3b are communicated 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 filling valve 33 is closed, and the postures of the three-way valves 31 and 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 bubble bath operation is executed without any waiting time, and after the operation is completed, a backwash operation is performed, and then a standby state is set.

In the above embodiment, the backwashing operation is performed only when the bubble bath operation is completed. However, the backwashing operation may be performed when the reheating operation is completed. In addition, regardless of any of these forced circulation operations, when the number of forced circulation operations reaches the set number, the backwashing operation may be executed when the final forced circulation operation is completed.

In the above embodiment, the circulation circuit for additional heating is always connected during the bubble bath operation.
The common circulation pump P is used to make the circuit water-permeable. However, as shown in FIG. 3, the additional heating circulation pump P ₂ is provided separately from the bubble bath circulation pump P ₁ in the additional heating circulation circuit 1c. The circuit is communicated between the reheating operation and the operation for the foam bath at the junction of the inlet side of the reheating circuit 1c and the circulation circuit 1 and at the junction of the outlet side of the recirculation circuit 1c and the circulation circuit 1. Three-way valves 16, 17 for switching the mode to a predetermined state may be inserted.

[0019] In this case, the capacity of the circulation pump P ₁ for bubble bath set large, a relatively small set the capacity of the circulation pump P ₂ for reheating compared to this. Usually, the amount of circulating hot water during the additional heating operation is relatively small, so that the amount of circulating hot water during the additional heating operation does not become excessive as compared with the case of FIG. That is, it is possible to set the amount of circulating hot water suitable for the operation state during both operations.

[Brief description of the 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 for controlling a backwash operation.

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

[Explanation of symbols]

 B: Bathtub 2: Filtration circuit 20: Filter

Claims (1)

(57) [Claims] 1. A circulating circuit connected to a bathtub is connected to a filtering circuit having a filter, and a backwashing circuit is connected to the filtering circuit. During the backwashing operation, washing water different from hot water in the circulating circuit. In a bath filtration apparatus in which the water is returned to the filtration circuit and discharged to the outside, the number of operations of the circulation circuit in which the use of the filtration circuit is performed in parallel reaches a predetermined number, and the final circulation circuit A filter device for a bath, comprising a backwash control device for executing the backwash operation for a predetermined time in response to input of an operation end signal.