JPH0713770Y2 - Bath filtration equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a bath filtration device for filtering hot water in a bath to remove dust such as scales and hair.

(Prior Art) Conventionally, a bubble ejecting function is added as a composite function to this type of filtering device. That is, the bath water is circulated for filtering, but when ejecting the sucked bath water into the bath, air is mixed by utilizing the ejector effect. However, a large flow rate (30 l / min) of hot water had to be circulated in order to eject the bubbles, and thus the filter which became the passage resistance was provided in another circuit as shown in FIG. In FIG. 3, A is a bath, B is a filter, C is a circulation path, and D is a bubble ejector.

On the other hand, there is a problem that the bath water is cooled when filtering or blowing bubbles. Conventionally, a reheating device F is provided separately from the above filtering device.
Was provided to circulate and heat.

(Problems to be solved by the invention) However, with the above-described conventional one, many circulation ports E are opened in the bathtub A, which is unsightly, and there are many pipes, which makes the construction difficult. Moreover, the filter device and the reheating device F are required, the installation place is required, and the operations are complicated because the respective operations are independent.

An object of the present invention is to solve the above-mentioned problems and to provide a bath filtration device having a circuit configuration capable of obtaining an optimum circulation flow rate for each of the functions of filtration, foaming, and reheating.

(Embodiment) Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows an automatic bath device equipped with the bath filtration device of the present invention. In FIG. 1, reference numeral 1 is a bathtub, 2 is a circulation circuit for circulating hot water in the bathtub 1, 3 is a hot water supply circuit for dropping hot water into the bathtub 1, and the hot water supply circuit 3 is provided with a circulation circuit 2 through the bathtub 1 It is connected to the. The circulation circuit 2 is connected to the bathtub 1, and the circulation circuit 2 is provided with a pump 5 for forcibly circulating the hot water in the bathtub 1. The discharge side of the pump 5 heats the hot water bath heat exchanger. 6, a pressure sensor 7 for detecting the water level in the bathtub 1, a water flow switch 8 used for circulation determination, etc., a thermistor 9 for detecting the hot water temperature in the bathtub 1.
A reheating circuit 4 having the above is provided. Further, a bypass circuit 23 is provided in parallel with the reheating circuit 4 provided with the bath heat exchanger 6, and the bypass circuit 23 is provided with an orifice 21. A three-way valve 28 is provided on the suction side of the pump 5 and is connected to the hot water supply circuit 3.
The hot water supply circuit 3 is connected to the reheating circuit 2 from city water through the hot water supply heat exchanger 10, and the hot water supply branch circuit 11 is branched from the hot water supply circuit 3 downstream of the hot water supply heat exchanger 10. ing. The hot water supply branching circuit 11 is connected to a shower, a currant, or the like, and supplies hot water to these devices. An inlet water flow rate sensor 12 for detecting an inlet water flow rate from city water and a thermistor 13 for detecting a water temperature are provided on the upstream side of the hot water heat exchanger 10 in the hot water supply circuit 3, and the hot water heat exchanger 10 is provided.
Between the hot water supply branch circuit 11 and the hot water supply branch circuit 11, there are provided a flow rate adjusting valve 14 for adjusting the incoming water flow rate, and a thermistor 15 for detecting the hot water supply temperature of the hot water supply heat exchanger 10. Further, on the downstream side of the hot water supply branch circuit 11, a flow rate adjusting valve 16 for controlling the drop flow rate, a drop flow rate sensor 17 for detecting the drop flow rate into the bathtub 1, a vacuum breaker 18,
A drop opening / closing valve 19 and a check valve 20 for opening / closing the hot water supply circuit 3 are provided. A filtering circuit 30 having a filtering device 22 is branched downstream of the merging portion of the reheating circuit 4 and the bypass circuit 23 of the circulation circuit 2. The downstream end of the filtration circuit 30 and the circulation circuit 2 are connected by a three-way valve 25. Further, a backwash drainage circuit 24 is branched from a location upstream of the filter 22 of the filtration circuit 30 via a three-way valve 26.

31 is a bubble ejector provided in the bath discharge part of the circulation circuit 2,
An air pipe 33 is connected via an on-off valve 32, and bubbles are mixed in the jet jet discharged from the circulation circuit 2 by the ejector effect.

To describe the operation of the automatic bath apparatus when it is dropped (hot water supply), the three-way valve 28 connects the circulation circuit 2 and the hot water supply circuit 3 and the three-way valve 25 is controlled so as to close the filtration circuit 30 side. When the drop opening / closing valve 19 is opened, hot water flows from the hot water supply circuit 3 into the circulation circuit 2, passes through the bath heat exchanger 6 and the bypass circuit 23, and is dropped into the bathtub 1. Therefore, in this case, the hot water is filtered 22
Do not pass through.

Next, the operation at the time of reheating will be described. At this time also the three-way valve
25 is closing the filter circuit 30 side like the time of dropping. Then, the three-way valve 28 closes the hot water supply circuit 3 side and switches to the circulation side. Then, when the pump 5 is operated, hot water is sucked from the bathtub 1 into the circulation circuit 2 as shown by a solid arrow, passes through the bath heat exchanger 6 and the bypass circuit 23, and
Return to Bath 1. Therefore, also in this case, the hot water is filtered by the filter 22.
Do not pass through. In addition, hot water passes through the bath heat exchanger 6,
It is heated by a burner (not shown).

In addition, at the time of filtration, the three-way valve 25 and the circulation circuit 2
It is controlled to communicate with the bathtub discharge side of
The three-way valve 26 is controlled to close in the direction of the backwash drain circuit 24, and the pump 5 is operated. Hot water is sucked into the circulation circuit 2 from the bathtub 1, and the reheating circuit 4 and the bypass circuit 23
After merging, it passes through the filter 22 as shown by the broken line, removes fine dirt such as scales in the bath water, and then returns to the bathtub 1 again.

Next, at the time of backwashing, the three-way valve 25 is connected to the filtration circuit 30 side and the circulation circuit 2
Is controlled to communicate with the pump 5 side of
The three-way valve 26 is controlled so that the filter 22 side and the backwash drain circuit 24 are communicated, and the pump 5 is operated. The hot water in the bathtub 1 passes through the bath heat exchanger 6 and the bypass circuit 23, and after being merged, flows back through the filter 22 as shown by the dotted line and is drained from the backwash drain circuit 24. At this time, the backwash water flows back through the filter 22, so that the dirt adhering to the filter material in the filter 22 is peeled off by the backwash water, washed away, and discharged together with the backwash water.

Next, the operation during the bubble bath operation will be described. Three-way valve 28,
25 is controlled in the same way as when reheating. Then, the pump 5 is operated with a larger capacity than that at the time of reheating. When the opening / closing valve 32 of the air pipe 33 connected to the bubble jetting device 31 is opened, bubbles are mixed in the discharge jet flow into the bathtub 1 to form a bubble bath. Further, each operation described above is controlled by a single control device including a microcomputer, and its operating device may correspond to the control device.

In the operation of each of the above functions, there is a flow rate suitable for each. That is, at the time of reheating, it is necessary to set a small flow rate (for example, 8 l / min) so that hot water does not spout into the bathtub 1 vigorously, and it is necessary to set a large flow rate (for example, 30 l / min) during bubble operation. Even in the case of filtration, the optimum flow rate is determined by the filtration time and the amount of filter material, that is, the filtration performance.

However, as described above, there is a large difference in the required flow rate between the reheating and the bubble operation, and merely changing the capacity of the pump 5 exceeds the pump capacity and accuracy limits. Therefore, in this embodiment, an orifice 21 is arranged in parallel with the reheating circuit 4 and a bypass circuit 23 that is always opened without opening and closing with a valve is provided. That is, although the circulation circuit 2 has a large pipe diameter for bubble operation, the reheating circuit 4 has a small pipe diameter in accordance with the bath heat exchanger 6, and therefore, during bubble operation, the reheating circuit 4 Causes a large flow resistance, which makes it impossible to perform the intended operation. Therefore, the orifice 21 is provided and the bypass circuit 23 that is always open is provided, so that a large flow path resistance in the reheating circuit 4 is eliminated and the entire circulation circuit can withstand a large flow rate. In addition, the orifice 21 is
This is for regulating the flow rate of the bypass circuit 23 and ensuring the flow rate to the reheating circuit 4. And the bypass circuit
By providing 23, the hot water heated in the reheating circuit 4 and the unheated water in the bypass circuit 23 are mixed at the time of reheating, and the hot water from the reheating circuit 4 is not directly ejected into the bathtub 1, Safety can also be improved.

In addition, since the filtering circuit 30 is branched from the circulation circuit 2 and arranged in parallel, filtering is performed only when necessary and when not necessary.
It does not pass 30 and does not have extra flow resistance.

In the present embodiment, since the resistance of the filter 22 is not involved during the reheating and the bubble operation, the capacity of the pump 5 and the orifice 21 are not required.
The optimum flow rate can be set by, and the optimum flow rate can be set by the pump capacity during filtration.

If the flow rates of the respective functions are within the allowable range, it is possible to operate simultaneously.

Next, another embodiment shown in FIG. 2 will be described. The same parts as those in FIG. 1 are designated by the same reference numerals, and a description thereof will be omitted. In the second embodiment, a three-way valve 27 is arranged at the branch portion to the filtration circuit 30, and the filtration circuit 30 downstream of the three-way valve 27 is branched so as to be connected to the three-way valve 26 and the three-way valve 25. There is. The side of the three-way valve 25 that is not connected to the filter 22 is connected to the circulation circuit 2 downstream of the three-way valve 27.

During reheating and during bubble operation, both of the three-way valve 27 are opened on the circulation circuit 2 side, and hot water flows as shown by the solid line in the figure. During filtration and backwash, the three-way valve 27 is controlled so as to connect the pump 5 side of the circulation circuit 2 and the filtration circuit 30. At the time of filtration, as in the case of FIG. 1, the three-way valve 26 controls the three-way valve 27 and the filter 22 to communicate with each other, and the three-way valve 25 controls the filter 22 and the bath discharge side of the circulation circuit 2 to communicate with each other. Then, the hot water flows as shown by the broken line in the figure. During backwashing, the three-way valve 25 connects the three-way valve 27 and the filter 22, and the three-way valve 26 causes the filter 22 and the backwash drain circuit.
It is controlled to communicate with 24, and hot water flows as shown by the dotted line in the figure.

The three-way valve 25 in FIG. 1 must be able to communicate freely in three directions, but in the one in FIG. 2, the three-way valve 25 can be fixed in one direction and variable in two directions. This is because the piping diameter of the circulation circuit 2 is as large as φ20, whereas the piping diameter of the filtration circuit 30 is as small as φ9, so the three-way valve 25 as shown in FIG. 1 becomes very expensive, and FIG. This is because it is cheaper to use two three-way valves like the one.

Instead of the three-way valve 27 of FIG. 2, a two-way valve 29 may be provided in the circulation circuit 2 downstream of the branch point of the filtration circuit 30 as shown by the broken line in FIG. This is cheaper than the three-way valve 27.

Furthermore, the three-way valve 27 of FIG.
The circulation circuit 2 may be connected to the suction side instead of the bath discharge side. This reduces the flow path resistance of the circulation circuit and increases the flow rate during bubble operation. In this case, if the position of the three-way valve 25 is on the side of the filtration circuit 30 during circulation, hot water does not pass through the filter 22, and if it is on the side of the circulation circuit 2, simultaneous operation of filtration is possible.

(Effect of the Invention) As described above, the present invention interposes the reheating circuit in the circulation circuit for circulating the hot water in the bathtub and the bypass circuit which is provided in parallel with the reheating circuit and is always open. Since the orifice is installed and the filtration circuit is branched from the downstream side of the confluence of the reheating circuit and the bypass circuit, reheating, foaming operation and filtration operation can be achieved with one device, and the installation location is small. It's easy to operate. Moreover, at the time of reheating, the heated hot water and the unheated hot water are mixed, so that the heated hot water does not directly spout into the bathtub, and the safety can be improved.
Then, it is possible to design so as to obtain the optimum flow rate for each function of reheating, foaming operation, and filtering operation, and it is possible to improve the function.

[Brief description of drawings]

FIG. 1 is a block diagram of a bath filtration device according to an embodiment of the present invention, and FIG. 2 is a block diagram of another embodiment. FIG. 3 is a schematic configuration diagram of a conventional example. 1 ... Bath 2 ... Circulation circuit 4 ... Additional circuit 22 ... Filter 23 ... Bypass circuit 30 ... Filtration circuit

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Bunsho Fujimoto 32 Akashi-cho, Chuo-ku, Kobe, Hyogo Prefecture Noritsu Internal Auditor Naoto Noda (56) Bibliography 1-78855 (JP, U)

Claims (1)

[Scope of utility model registration request] A reheating circuit having a bath heat exchanger and a bypass circuit provided in parallel with the reheating circuit and always open are provided in a circulation circuit for circulating hot water in a bathtub,
A bath filtration device, characterized in that an orifice is provided in the bypass circuit, and a filtration circuit having a filter is branched from a downstream side of a confluence portion of the reheating circuit and the bypass circuit.