JPH03202027A - Bathtub system - Google Patents

Abstract

PURPOSE:To continue a normal backwash with a necessary water quantity, and also, to prevent a backwash pump from being damaged and broken down by executing the backwash of a filter by bathtub water, when the storage water replenishing quantity becomes a prescribed value or below. CONSTITUTION:In order to execute the backwash of a filter 2 even by bathtub 1 water, a bypass piping 8 is connected in parallel to the filter 2. Also, by interposing an orifice 9 and a motor-driven valve V5 on the way of this bypass piping 8, a bathtub water backwash passage (c) is constituted. In a cistern 3, a sensor S for detecting the storage water replenishing quantity at the time of backwash by utilizing a storage water backwash passage (b) is provided. When the replenishing quantity Q2 to the cistern 3 is decreased or used up due with some factor including suspension of water supply, and an unbalance is generated between the replenishing quantity Q1 and the suction quantity Q0, the bathtub water backwash passage (c) is controlled by an output of the sensor S and water in the bathtub 1 is allowed to flow into the filter 2 in the reverse direction as backwash water.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention provides a bathtub system having a function of backwashing a filter with water stored in a storage tank and a function of backwashing a filter with water in the bathtub. Regarding.

<Prior Art> An example of a conventional bathtub system will be described with reference to FIG.

A bathtub water purification circulation flow path a indicated by a solid line arrow transports bathtub water from the bathtub l to the filter 2 via the first electric valve VI and the filtration pump P.
This is a flow path that allows water to flow from the forward inflow side 2a to the forward outflow side 2b and returns to the bathtub 1 via the second motor-operated valve V2.

The stored water backwash flow path indicated by the broken line arrow transports the stored water stored in the cistern 3 to the backwash pump P7. This is a flow path through which water flows into the filter 2 from the forward direction outflow side 2b to the forward direction inflow side 2a via the third electric valve V, and discharges to the outside via the fourth electric valve 4.

The fourth electric valve v4 is interposed in a drain pipe 5 branched from the middle of the pipe 4 connecting the filtration pump PI and the forward inflow side 2a of the filter 2. The Gistern 3 is configured to be supplied with water from a water supply source, etc., and is configured to maintain a constant level of clean water stored by a built-in float valve 6.

Next, the operation of this bathtub system will be explained.

■ Bathtub water purification 1st T! Open the first electric valve V and the second electric valve v2, and open the third electric valve V.
By closing the electric valve V and the fourth electric valve V4,
Bathtub water purification circulation flow path a) Set to IC functional state. When the filtration pump P is driven in this state, the bathtub water is sucked into the filtration pump P through the 1'F4 valve V, as shown by the solid line arrow, and is further discharged from the filtration pump P. Forward outflow 012 from the 111N direction inflow side 2a to the vessel 2
At this time, dirt such as dirt contained in the bathtub water is removed by the filter medium in the filter 2 and purified. The purified bathtub water is returned to the bathtub 1 via the second electric valve vz4.

■ By opening the filter backwash third motorized valve V and fourth motorized valve v4 and closing the first motorized valve ■ and second motorized valve V2, the clean water backwash flow path is brought into a functional state. do.

When the backwash pump P2 is driven in this state, the water stored in the DiStern 3 is sucked into the backwash cylinder 1P2 as indicated by the broken line arrow, and is further discharged from the backwash pump P2 and filtered through the 31stM valve V. The water flows into the vessel 2 from the forward outflow side 2b to the forward inflow side 2a, and at this time, dirt is separated from the filter medium in the filter 2 and the filter medium is backwashed. Drain waste water containing dirt into the drain pipe 5. It is discharged to the outside via the fourth electric valve V4.

As the water stored in the cistern 3 flows out, the float valve 6 opens and clean water is replenished into the cistern 3 from the water supply or the like.

Now, backwash pump P! When it is stopped, the water level in the cistern 3 rises, and when the float valve 6 rises to a predetermined height, the float valve 6 closes and replenishment from the water supply etc. is stopped, and the water level in the cistern 3 rises to the predetermined level. is maintained.

<Problems to be Solved by the Invention> However, the conventional example having such a configuration has the following problems.

In order to properly backwash the filter media in the filter 2, a certain flow rate determined by the size of the filter 2, hair on the filter media, water flow resistance of the piping system, etc. is required, and it is necessary to ensure this flow rate. The capacity Qo (1/mtn) of the backwash pump P2 is determined.

However, the supply amount of clean water from the water supply etc. to DiStern 3 decreases due to some factor, or becomes absent due to a water outage, resulting in a difference between the supply amount Ql (1/win) and the suction IQ + 1 by the backwash pump P2. An imbalance (Ql <QO) may occur.

If such a situation occurs, the water stored in the cistern 3 will eventually run out and air will enter the backwash pump P2, causing the backwash pump Pz to run dry and potentially be damaged or destroyed. . Further, due to insufficient amount of backwash water, backwashing of the filter 2 is not performed normally.

The present invention was devised in view of these circumstances, and even if the amount of stored water to be replenished during backwashing is insufficient, the amount of backwash water to the filter can be secured, and the backwash pump can be prevented from being damaged. The purpose is to avoid damage and destruction.

Means for Solving the Problems> In order to achieve the above objects, the present invention has the following configuration.

The bathtub system of the present invention includes a filter that filters bathtub water flowing in the forward direction, a storage tank that stores water for backwashing the filter, and a filter that filters the water stored in the storage tank or the water in the bathtub. a backwash water supply means for selectively flowing in and discharging the water in a reverse direction; a detection means for detecting the replenishment amount of water stored in the storage tank; and a detection means for detecting the replenishment amount of the water stored in the storage tank; When the water is below a predetermined value, the water bath is characterized by comprising a control means that controls the backwash water supply means to cause the water in the bathtub to flow into the filter in the opposite direction as backwash water.

<Effect> The effects of the above configuration of the present invention are as follows.

When backwashing the filter with water in the storage tank,
When the amount of stored water replenishment detected by the detection means is less than a predetermined value due to an imbalance between the amount of stored ice sent out for backwashing and the amount of stored water refilled to compensate for it, the control means controls the backwash water supply means to backwash the filter with water in the bathtub.

<Example> Hereinafter, an example of the present invention will be described in detail based on the drawings.

FIG. 1 is a schematic diagram of a bathtub system according to an embodiment.

In Fig. 1, l is a bathtub, 2 is a filter, 2a is l#,
2b is the forward inflow side of the filter 2, 2b is the forward outflow side, 3 is the tank as a storage tank, 5 is the drain pipe, 6 is the float valve, P is the filtration pump, P2 is the backwash pump, v, = V ,
are the first to fourth motor-operated valves, and a is the connection from the bathtub l to the first motor-operated valve ■1. as shown by the solid arrow. Filtration pump P1. Filter 2
and a second valve V, a bathtub water purification circulation flow path that returns to the bathtub 1 via a broken line arrow, and b a backwash pump Pt, a third electric valve Vs, a filter 2. Drain pipe 5
and a fourth electric valve (2), and a stored water backwash flow path leading to the outside. These structures are similar to the conventional example shown in FIG. Note that the filtration pump P1 and the backwash pump P2 correspond to backwash water supply means.

In this embodiment, in order to backwash the filter 2 even with bath water, a three-way branch point with the drain pipe 5 in the pipe 4 connecting the filtration pump P+ and the forward inflow side 2a of the filter 2 is provided. A point Q on the side of the filtration pump P than Ql,
A bypass pipe 8 is connected in parallel with the filter 2 between a point Q on the pipe 7 connecting the forward outflow side 2b of the filter 2 and the second electric valve Vt, and a bypass pipe 8 is connected in parallel with the filter 2, and A bathtub water backwash channel C is constructed by interposing an orifice 9 and a 51st valve V.

That is, this bathtub water backwash flow path C transports bathtub water from the bathtub 1 to the first ift valve V1.
Filtration pump P++ Bypass piping 8 (orifice 9.
The water flows into the filter 2 from the forward outflow side 2b to the forward inflow side 2a through the fifth electric valve VS), and the drain pipe 5
．． This is a flow path for discharging to the outside via the fourth electric valve v4.

The bathtub water sent by the filtration pump P1 is passed through the filter 2.
A sixth electric valve V is interposed in the pipe 4 at I/1 between the three-way branch points Q+ and Qz for switching between a state of allowing and a state of prohibiting the flow of water in the forward direction. There is. The orifice 9C is used to match the backwashing capacity of the filtration pump PI to the backwashing capacity of the backwash pump P2.

In the Gistern 3, as a detection means for detecting the amount of stored water replenishment during backwashing using the stored water backwash flow path, a lower limit water level L1 determined at a low position in the Gistern 3 is detected. A reservoir water replenishment amount sensor S is provided, which includes a lower limit float switch S that detects the upper limit water level L2, and an upper limit float switch S that detects the upper limit water level L2 set at a higher position. The lower limit water level L1 corresponds to the lower limit of the standard range for the amount of stored water replenishment from waterworks etc. to DiStern 3,
The upper limit water level L2 corresponds to the upper limit.

The control means IO receives mode setting signals from at least a bathtub water purification mode key, a filter backwashing mode key, and a lower limit float switch S1. Based on the input with the detection signal from the upper limit float switch S2, the first to sixth electric valves v
I-vh, filtration pump P+, and backwash pump Pz are sequentially controlled. The two-dot chain line indicates the control system.

Next, the operation of the bathtub system of this embodiment will be explained.

[i] Bathtub water purification When + is pressed on the bathtub water purification mode key, the control means 10
First electric valve ■1. 2nd electric valve Vt and 6ii valve actuator V
6 and open the 31st!1 valve train v1. By closing the fourth motor operated valve v4 and the 51st motor operated valve V, the control means 10 brings the bathtub water purification circulation flow path a into a functional state.Then, the control means 10 drives the filtration pump P1. As shown by the arrow, the bathtub water passes through the first electric valve V1 to the filtration pump P1.
The water is sucked into the filter pump P, is discharged from the filtration pump P, and flows into the filter 2 from the forward inflow side 2a to the forward outflow side 2b through the valve V, and is contained in the bathtub water. Dirt such as dirt is removed by the filter medium in the filter 2 and purified. The purified bathtub water is returned to the bathtub 1 via the second electric valve V2, and the same circulation is repeated thereafter to purify the bathtub water.

[ii1 Filter backwashing with stored water In period T0 in the time chart of Fig. 3,
The reservoir 3 is sufficiently filled with stored water replenished from the water supply or the like to a level higher than the upper limit water level L2, and the float valve 6 is closed. Lower limit float switch S
, and the upper limit float switch S2 are also in the ON state.

When 2 is pressed on the filter backwash mode key (time t1),
The control means 10 opens the third iIt valve train V and the fourth valve train v4, and opens the first valve train v1. 2nd iii valve train v! , the fifth motor-operated valve V, and the sixth iit valve V6 are kept closed, thereby bringing the stored water backwash flow path into a functional state.

The control means 10 then drives the backwash pump P2.

As a result, as shown by the broken line arrow, the water stored in the distiller 3 is sucked into the backwash pump P2, and is further discharged from the backwash pump P2 to the filter 2 via the 31st valve V. The water flows from the forward outflow side 2b toward the forward inflow side 2a, and at this time, dirt is separated from the filter medium in the filter 2 and the filter medium is backwashed. The wastewater containing dirt is discharged to the outside through a drain pipe 5° and a fourth electric valve v4.

The upper limit float switch S2 turns OFF as the stored water flows out from the register 3 (time 1), but the float valve 6
is opened and clean water is supplied to Jistern 3 from the water supply etc. Usually, the supply amount is Q.

The water level of the stored water in the distern 3 is stabilized between the lower limit water level Ll and the upper limit water level L2 (period T1>,
At this time, the lower limit float switch S maintains the ON state.

[iii] Switching to backwashing using bathtub water Jistern 3
If the replenishment amount Q1 decreases or disappears due to some factor including water outage, the replenishment amount Q1 and intake amount
When an imbalance ((1+ <Qo) occurs between
.

When the water level becomes lower than the lower limit water level L1, the lower limit float switch S1 is turned off (time t), and the control means 10:
Based on this OFF signal, backwash pump P2 is stopped,
By closing the third electric valve V, the function of the stored water backwash flow path is stopped, and in its place, the first electric valve V1 and the fifth electric valve V are closed.

At the same time, the fourth electric valve v4 is kept open to function the bathtub water backwash channel C, and then to drive the filtration pump P.

By stopping the function of the stored water backwash flow path before the stored water in the distern 3 runs out, air can be prevented from entering the backwash pump P.

The water level in Jistern 3 gradually rises as clean water is replenished from the water supply system. At the beginning of the rise, the lower limit float switch S1 returns to the ON state again, but the state of control by the control means 10 does not change, and the functional state of the bathtub water backwash channel C is maintained.

By driving the filtration pump P1, the bathtub water flows through the first electric valve V to the filtration pump P, as shown by the solid thick arrow.
, is further discharged from the filtration pump P1, and flows into the filter 2 from its forward outflow side 2b to its forward inflow side 2a via the bypass pipe 8 (orifice 9, fifth electric valve VS). The filter medium in the filter 2 is backwashed, and the wastewater is drained into the drain pipe 4. It is discharged via the fourth il valve V4.

That is, even if there is a shortage of stored water for backwashing in the distiller 3, backwashing of the filter 2 can be continued by switching to backwashing using bath water.

[iv] During the return period T to backwashing using stored water, backwashing of the filter 2 is performed using bath water, but during this period, clean water continues to be supplied to the distiller 3, and the water level reaches the upper limit. When the water level reaches L2, the upper limit float switch S! turns ON (time t4). Based on this ON signal, the control means 10 switches from the state [iii] to the state [11] and returns to backwashing of the filter 2 with the stored water.

Although the upper limit float switch S2 is turned off at the beginning of the outflow of the stored water from the distern 3, the state of control by the control means 10 does not change.

When the state of backwashing with stored water returns, the previous process [ii
Since air is prevented from entering the backwash pump P2 in advance in step 1], the backwash pump P2 does not operate idly even at the initial stage of its return, and is thus freed from damage or destruction.

The present invention is not limited to the above-mentioned embodiments, and the lower limit float switch S is used as means for detecting the amount of stored water replenishment.
An electrode type level sensor may be used in place of I and the upper limit float switch S2, or direct measurement may be performed with a water meter.

<Effect of the invention> According to the present invention, the following effects are achieved.

In other words, when an imbalance occurs between the amount of stored ice sent out by the backwash pump and the amount of stored water refilled to compensate for it, and the amount of stored water refilled falls below a predetermined value, the bathtub water is used instead of backwashing with stored water. This allows backwashing of the filter to be carried out with the required amount of water, allowing normal backwashing to continue with the required amount of water, as well as preventing air from entering the backwash pump and preventing backwashing from running dry. Damage and destruction of the pump can be prevented.

[Brief explanation of drawings]

1 and 2 relate to one embodiment of the present invention, with FIG. 1 being a schematic configuration diagram of a bathtub system, and FIG. 2 being a time chart for explaining the operation. FIG. 3 is a schematic diagram of a conventional bathtub system. 1... Bathtub, 2... Filter, 2a.
...Forward inflow side, 2b...Forward outflow side, a.
... Bathtub water purification circulation flow path, b... Reserved water backwash flow path, C... Bathtub water backwash flow path, 3... Distane, Pl... Filtration pump, P2... Backwash Pump, S...Stored water replenishment amount sensor, 10...Control means. Figure 2

Claims (1)

[Claims] (1) A filter that filters the bathtub water flowing in the forward direction, a storage tank that stores the water for backwashing the filter, and a storage tank that stores the water for backwashing the filter, and a system that drains the water stored in the storage tank or the water in the bathtub in the opposite direction to the filter. a backwash water supply means for selectively flowing in and discharging water in a direction; a detection means for detecting a replenishment amount of water stored in the storage tank; and control means for controlling the backwash water supply means to cause water in the bathtub to flow in the reverse direction into the filter as backwash water.