JPH064057B2 - Bathtub system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a bathtub system having a function of backwashing a filter with stored water in a storage tank and a function of backwashing the filter with water in a bathtub. Regarding

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

The bath water purifying circulation flow path a indicated by a solid arrow indicates the bath water from the bath 1 through the first solenoid valve V ₁ and the filtration pump P ₁ to the filter 2
On the other hand, it is a flow path that flows from the forward inflow side 2a to the forward outflow side 2b and returns to the bathtub 1 via the second electromagnetic valve V ₂ .

The stored water backwash flow path b indicated by a broken line arrow is a forward direction of the stored water stored in the cistern 3 from the forward outlet side 2b to the filter 2 via the backwash pump P ₂ and the third solenoid valve V _3. Inflow side 2
It is a flow path that flows into a and is discharged to the outside through the fourth electric valve V ₄ .

The fourth electromagnetic valve V ₄ is interposed in a drain pipe 5 branched from the middle of a pipe 4 that connects the filtration pump P ₁ and the forward inflow side 2 a of the filter 2. The cistern 3 is designed to reinforce water from the water supply or the like, and the float valve 6 incorporated therein keeps the storage level of clean water constant.

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

Bath water purification The first electric valve V ₁ and the second electric valve V ₂ are opened, and the third electric valve V ₃ and the fourth electric valve V ₄ are closed, so that the bath water purification circulation passage a is brought into a functional state. When the filtration pump P ₁ is driven in this state, the bath water is sucked into the filtration pump P ₁ via the first electric valve V ₁ and further discharged from the filtration pump P ₁ as indicated by the solid arrow, and the filter 2 To the forward outflow side 2b from the forward inflow side 2a, and dirt such as dust contained in the bath water at this time is removed and purified by the filter medium in the filter 2. The purified bath water is returned to the bath 1 via the second electric valve V ₂ .

Filter backwashing The third electric valve V ₃ and the fourth electric valve V ₄ are opened, and the first electric valve V ₁ and the second electric valve V ₂ are closed, so that the clean water backwash passage b is brought into a functional state. . In this state, backwash pump P ₂
, The stored water in the cistern 3 is sucked into the backwash pump P ₂ and further discharged from the backwash pump P ₂ to the filter 2 via the third electric valve V _3. The material flows from the forward-direction outflow side 2b toward the forward-direction inflow side 2a, at which time dirt is separated from the filter material in the filter 2 and the filter material is backwashed and washed. Wastewater containing dirt is discharged to the outside through the drain pipe 5 and the fourth electric valve V ₄ .

With the outflow of the stored water in the cistern 3, the float valve 6 is opened and clean water is supplied to the cistern 3 from the water supply or the like.

When the backwash pump P ₂ is stopped, the water level in the cistern 3 rises, and when the float valve 6 rises to a predetermined height accordingly, the float valve 6 closes to stop the supply from the water supply or the like, and the cistern 3 The water level inside is kept at a predetermined level.

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

In order to satisfactorily backwash the filter medium in the filter 2, a certain flow rate determined by the size of the filter 2, the amount of filter medium, the flow resistance of the piping system, etc. is necessary, and this flow rate can be secured. The capacity Q ₀ [/ min] of the backwash pump P ₂ is defined in the above.

However, the supply amount of clean water from the water supply or the like to the cistern 3 decreases due to some factor or disappears due to water interruption, so that the supply amount Q ₁ [/ min] and the intake amount Q ₀ by the backwash pump P ₂ are Imbalance (Q ₁ <
Q ₀ ) may occur.

When this occurs, eventually cistern 3 in the reservoir water air enters the backwash pump P ₂ disappears, and there is a risk that the backwash pump P ₂ is or destroyed damaged becomes idling state . Further, the backwashing of the filter 2 cannot be normally performed due to the insufficient amount of the backwashing water.

The present invention has been devised in view of such circumstances, and secures a backwash water amount for a filter and damages a backwash pump even when the stored water supply amount during backwash is insufficient. The purpose is to be able to avoid destruction.

<Means for Solving the Problems> The present invention has the following configuration in order to achieve such an object.

The bathtub system of the present invention comprises: a filter for filtering bath water flowing in a forward direction; a storage tank for storing backwash water of the filter; and a storage water in the storage tank or a water in the bathtub. The backwash water supply means for selectively inflowing and discharging in the opposite direction, the detecting means for detecting the replenishment amount of the stored water in the storage tank, and the replenishment amount based on the input of the detecting means output. When the value is equal to or less than a predetermined value, the backwash water supply means is controlled to control the water in the bathtub as backwash water to flow in the reverse direction to the filter.

<Operation> The operation of the above configuration of the present invention is as follows.

When backwashing the filter with the water in the storage tank,
When the stored water supply amount detected by the detection means is equal to or less than a predetermined value due to an imbalance between the stored water delivery amount for backwashing and the stored water supply amount for compensating for it, the control means Controls the backwash water supply means to backwash the filter with the water in the bath.

<Example> Hereinafter, an example of the present invention is described in detail based on a drawing.

FIG. 1 is a schematic configuration diagram of a bathtub system according to the present invention.

In FIG. 1, 1 is a bath, 2 is a filter, 2a is a forward inflow side of the filter 2, 2b is a forward outflow side, 3 is a cistern as a storage tank, 5 is a drain pipe, 6 is a float valve,
P ₁ is a filtration pump, P ₂ is a backwash pump, V _{1 to} V ₄ are first to fourth electrically operated valves, a is a first electrically operated valve V ₁ from the bathtub 1 and a filtration pump P ₁ as indicated by a solid arrow. , Filter 2 and second
Bathtub water purification circulation channel returning to the bathtub 1 via the motor-operated valve V ₂ ,
As indicated by a dashed arrow, b is a stored water backwash flow path from the cistern 3 to the outside through the backwash pump P ₂ , the third electric valve V ₃ , the filter 2, the drain pipe 5 and the fourth electric valve V _4. Is. These configurations are similar to those of the conventional example shown in FIG. The filtration pump P ₁ and the backwash pump P ₂ correspond to the backwash water supply means.

In the present embodiment, in order to enable backwashing of the filter 2 even with bath water, a three-way branch of the drainage pipe 5 in the pipe 4 connecting the filtration pump P ₁ and the forward inflow side 2a of the filter 2 the point Q ₂ of filtering pump P ₁ side from the point Q _1, between the forward outlet side 2b and the point Q ₃ on the pipe 7 for connecting the second electric valve V ₂ of the filter 2, a filter A bypass pipe 8 is connected in parallel with the pipe 2, and an orifice 9 and a fifth electric valve V ₅ are provided in the middle of the bypass pipe 8 to form a bath water backwashing flow path c.

That is, this bathtub water backwash flow path c draws bathtub water from the bathtub 1 to the first electric valve V ₁ , the filtration pump P ₁ , the bypass pipe 8 (the orifice 9, the fifth electric valve) as shown by the solid line arrow. V ₅ ), which is a flow path for inflowing into the filter 2 from the forward direction outflow side 2 b toward the forward direction inflow side 2 a and discharging it to the outside via the drain pipe 5 and the fourth electric valve V ₄ .

The bath water sent by the filtration pump P ₁ is the filter 2
A sixth motor-operated valve V ₆ for switching between a state in which a forward flow is permitted and a state in which the forward flow is prohibited is interposed in the pipe 4 between the three-way branch points Q ₁ and Q ₂ . The orifice 9 is for adjusting the backwashing capacity of the filtration pump P ₁ to the backwashing capacity of the backwash pump P ₂ .

In the cistern 3, the lower limit water level L1 set at a low position in the cistern 3 is detected as a detection means for detecting the amount of stored water reinforcement at the time of backwashing using the stored water backwash flow path b. A stored water reinforcement amount sensor S including a lower limit float switch S ₁ and an upper limit float switch S ₂ for detecting an upper limit water level L2 set at a high position is provided.
The lower limit water level L1 corresponds to the lower limit of the reference range for the stored water reinforcement amount for the cistern 3 from the water supply or the like, and the upper limit water level L2 corresponds to the upper limit.

The control means 10 includes a mode setting signal from at least a bath water purification mode key K ₁ and a filter backwash mode key K _2, and a lower limit float switch S ₁ and an upper limit float switch S ₂ provided in a remote control device (not shown). Based on the input with the detection signal, the first to sixth electrically operated valves V ₁
˜V ₆ , the filtration pump P ₁ and the backwash pump P ₂ are sequence-controlled. The chain double-dashed line shows the control system.

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

[I] Bathtub water purification When the bathtub water purification mode key K ₁ is pressed, the control means 10
By opening the first electric valve V ₁ , the second electric valve V ₂ and the sixth electric valve V ₆ and closing the third electric valve V ₃ , the fourth electric valve V ₄ and the fifth electric valve V ₅ , the bath water The purification circulation channel a is brought into a functional state. Then, the control means 10 controls the filtration pump P ₁
To drive.

As a result, as shown by the solid arrow, the bath water is sucked into the filtration pump P ₁ via the first electric valve V ₁ and further discharged from the filtration pump P ₁ through the sixth electric valve V ₆ to the filter. Dirt such as dust contained in the bath water flows into the filter 2 from the forward inflow side 2a toward the forward outflow side 2b, and is cleaned by the filter material in the filter 2. The purified bath water is returned to the bath 1 via the second electric valve V _2, and the bath water is purified while repeating the same circulation.

[Ii] Backwashing of filter with stored water In period T ₀ in the time chart of FIG. 3,
The stored water supplied from the water supply or the like is sufficiently stored in the cistern 3 up to a level higher than the upper limit water level L2, and the float valve 6 is closed. Both the lower limit float switch S ₁ and the upper limit float switch S ₂ are in the ON state.

When the filter backwash mode key K ₂ is pressed (time t ₁ ), the control means 10 opens the third electric valve V ₃ and the fourth electric valve V ₄ , and the first electric valve V ₁ and the second electric valve are opened. By keeping V ₂ , the fifth electric valve V ₅ and the sixth electric valve V ₆ closed, the stored water backwash flow path b is brought into a functional state. And the control means 1
0 drives the backwash pump P ₂ .

As a result, the stored water in the cistern 3 is sucked into the backwash pump P ₂ and is further discharged from the backwash pump P ₂ via the third electric valve V ₃ to the filter 2 as shown by the broken line arrow.
From the forward-direction outflow side 2b toward the forward-direction 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 the drain pipe 5 and the fourth electric valve V ₄ .

Although the upper limit float switch S ₂ is turned off with the outflow of the stored water from the cistern 3 (time t ₂ ), the float valve 6 is opened to replenish the cistern 3 with clean water from the water supply or the like. Normally, the replenishment amount Q ₁ and the intake amount Q ₀ by the backwash pump P ₂ are balanced, so that the stored water level in the cistern 3 is stable between the lower limit water level L1 and the upper limit water level L2. (Period T ₁ ). At this time, the lower limit float switch S ₁ maintains the ON state.

[Iii] Switching to backwashing with bath water The reinforcement amount Q ₁ for the cistern 3 decreases or disappears due to some factors including water interruption, and the reinforcement amount Q ₁
If an imbalance (Q ₁ <Q ₀ ) occurs between the intake amount Q ₀ and the intake amount Q ₀ , the water level in the systern 3 gradually drops (period T
₂ ).

When the water level becomes equal to or lower than the lower limit water level L1, the lower limit float switch S ₁ is turned off (time t ₃ ). Based on this OFF signal, the control means 10 stops the backwash pump P ₂ and closes the third electric valve V ₃ to stop the function of the stored water backwash flow passage b, and instead, the first electric motor. By opening the valve V ₁ and the fifth electric valve V ₅ and leaving the fourth electric valve V ₄ open, the bath water backwash passage c is made to function, and then the filtration pump P ₁ is driven.

By stopping the function of the stored water backwash flow path b before the stored water in the systern 3 is exhausted, it is possible to prevent air from entering the backwash pump P ₂ .

The water level in the cistern 3 gradually rises due to the reinforcement of clean water from the water supply or the like. Although the lower limit float switch S ₁ returns to the ON state again in the initial stage of the rise, the control state of the control means 10 does not change, and the functional state of the bath water backwash flow channel c is maintained.

By driving the filtration pump P ₁ , the bath water passes through the first motor-operated valve V ₁ and the filtration pump P _{1 as} shown by the solid thick line arrow.
It is sucked into and further discharged from the filtration pump P _1, bypass pipe 8 (orifice 9, the fifth motor-operated valve V ₅₎ through, from the forward outlet side 2b to filter 2 toward the forward inflow side 2a The filter medium inflows and backwashes the filter material, and the waste water is discharged through the drain pipe 4 and the fourth electric valve V ₄ .

That is, even if the stored water for backwashing in the cistern 3 is insufficient, the backwashing of the filter 2 can be continued by switching to backwashing with bath water.

[Iv] Return to Backwashing with Stored Water During the period T ₃ , backwashing of the filter 2 is performed with such bath water, and during this time, clean water is continuously replenished to the cistern 3, and the water level reaches the upper limit. When the water level L2 is reached, the upper limit float switch S ₂ is turned on (time t ₄ ). Based on this ON signal, the control means 10 switches from the state [iii] to the state [ii] and returns to backwashing the filter 2 with the stored water.

Although the upper limit float switch S ₂ is turned off at the initial stage of the outflow of the stored water from the systern 3, the control state of the control means 10 does not change.

When returning to the backwash condition with stored water, the previous process [ii
Since the backwash pump P ₂ in advance in i] is avoided from entering the air backwash pump P ₂ is not the idle running even in the initial stage of its return, spared from damage or destruction.

The present invention is not limited to the above-mentioned embodiment, but the lower limit float switch S is used as the means for detecting the stored water supply amount.
Instead of ₁ and the upper limit float switch S ₂ , an electrode type level sensor may be used, or a water meter may be used for direct measurement.

<Effects of the Invention> According to the present invention, the following effects are exhibited.

That is, when an imbalance occurs between the amount of stored water delivered by the backwash pump and the amount of supplemented stored water that compensates for it, and when the amount of supplemented stored water falls below a predetermined value, the bath water is replaced by backwash with stored water. Since the backwashing of the filter can be performed with the water, it is possible to continue normal backwashing with the required amount of water, and to avoid the entry of air into the backwashing pump to perform backwashing with idle operation. It is possible to prevent damage and destruction of the pump.

[Brief description of drawings]

1 and 2 relate to an embodiment of the present invention. FIG. 1 is a schematic configuration diagram of a bathtub system, and FIG. 2 is a time chart used for explaining the operation. FIG. 3 is a schematic configuration diagram of a conventional bathtub system. DESCRIPTION OF SYMBOLS 1 ... Bathtub, 2 ... Filter, 2a ... Forward direction inflow side, 2b ... Forward direction outflow side, a ... Bath water purifying circulation flow path, b ... Stored water backwash flow path, c ... Bathtub water backwash flow path, 3 ... Sistan, P ₁ ... Filtration pump, P ₂ ... Backwash pump, S ... Stored water supply amount sensor, 10 ... Control means.

Claims (1)

[Claims] 1. A filter for filtering the bath water flowing in the forward direction, a storage tank for storing backwash water for the filter, and a reservoir water in the storage tank or water in the bath for the filter. Backwash water supply means for selectively inflowing and discharging in the reverse direction, detection means for detecting the replenishment amount of the stored water in the storage tank, and the replenishment amount is a predetermined value based on the input of the detection means output. In the following case, the backwash water supply means is controlled to control the water in the bathtub as backwash water to flow in the reverse direction to the filter.