JPH03218758A - Bubble bath circulation device - Google Patents

Abstract

PURPOSE:To generate an equal jet injection flow, comparing with a use example in which a bypass line provided with a filter is not added by utilizing the capacity of a circulating pump to the maximum in order to generate jet injection bubbles. CONSTITUTION:When a second circulating pump 7 is stopped and only a first circulating pump 4 is driven, bathtub water circulates through a main circulating line 5, and from a jet nozzle 3, jet bubbles being a water flow containing the bubbles are injected to the inside of a bathtub 1. In this case, a bypass line 6 is connected to a main circulating line 5 in a state that water passing is possible in a branch part A and B. Also, since a filter 8 whose water passing resistance is large is installed in the bypass line 6, circulating water flows through only a main circulating line 5a whose water passing resistance is small. Therefore, although the bypass line 6 is added to the main circulating line 5, the capacity of a first circulating pump 4 is displayed to the maximum without giving any variation to pressure and a flow rate of circulating water for making a jet bubble injection flow, in the same way as the case the bypass line 6 is not added. In such a way, a jet bubble bath which is not accompanied with filtration is executed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a bubble bath circulation device that generates bubbles in bath water to provide a jet bubble bath and also circulates and filters bath water contaminated by bathing.

2. Description of the Related Art Conventional bathtub water filtration and circulation devices are known, for example, from Utility Model Application No. 63-1.
The structure described in Japanese Patent No. 68012 and the second conventional example shown in FIG. 4 was adopted. To explain the details of the first example with reference to FIG. 3, reference numeral 11 is a bathtub, and a perforation in the side wall of the bathtub 11 has a circulation outlet 12 from which bathwater flows from the bathtub to the outside, and a circulation outlet from which circulating water returns from the outside to the bathtub l1. A pump l3 is provided, the circulation outlet 12 and the circulation pump l3 are connected to the main circulation path 15, a first circulation pump 14 is provided in the middle of the main circulation path l5, and the first circulation bomb 14 is driven. Then, the bathtub water in the bathtub 11 passes through the main circulation path l5 from the circulation outlet 12, and returns to the bathtub 11 again through the circulation flow l3. In addition, a bypass equipped with a drainage bomb 17, a filter 18, and a three-way switching valve 20 is provided at the two branch parts A and B on the main circulation path 15, which sandwich the first circulation pump 14. 16 is connected. Then, when the first circulation pump 14 is driven to circulate the bath water to the main circulation path 15, the amount of circulating water Qa flowing through the first circulation bomb 14 from the branch B side on the high pressure side to the bypass path l6 is A portion of the circulating water shown enters the bypass passage 16 as circulating water indicated by the bypass flow rate qa, passes through the filter 18, filters the bathtub water contaminated by bathing, and then returns to the main stream from the branch A on the low pressure side. It joins the circulation path 15. In this way, the circulating water is subjected to the filtering action of the filter 18, and the filtration of the bathtub water is gradually promoted. Furthermore, as the filtering action progresses, if a large amount of contaminants are trapped in the filtering action part of the filter 18, the filtering performance will deteriorate, so it must be regenerated. Therefore, the drain channel 19 is connected to the three-way switching valve 20, the three-way switching valve 20 is switched so that the drain channel 19 and the filter 18 communicate with each other, the drain bomb 17 is driven, and the bath water flows through the filter 18. Let it flow in the opposite direction. In this way, the filter 18 uses the bath water as washing water for the filter 18 and passes water through the filter 18 in the opposite direction to that during filtration, and removes the pollutants captured in the filter 18 by the filtration action into the drain channel 18. The water was drained into the drainage ditch 19a, where it was cleaned and regenerated. Next, the details of the second example will be explained with reference to FIG. 4. Reference numeral 21 is a bathtub, and a circulation outlet 22 through which the bathtub water exits to the outside and a circulation outlet 23 through which the circulating water returns to the bathtub 21 are provided in a perforation in the side wall of the bathtub. , these are connected to the main circulation path 25, and a circulation pump 24 is provided in the middle of the main circulation path 25, and furthermore, a constriction portion 27 is provided on the discharge side of the circulation pump 24 to partially increase water flow resistance. Branch portions A and B are provided at both ends of a portion 25a of the main circulation path with the constriction portion 27 in between. A bypass path 2 is connected to these two branch parts A and B.
6 is connected, and a filter 28 is provided in the middle of the bypass path 26. Next, when the circulation pump 24 is driven, the bathtub water exits the circulation outlet 22 and passes through the main circulation path 25, and at the branching part A, the main circulation path 25a is equipped with a throttle section 27 and a bypass equipped with a filter 28. The two passages with channel 26 are separated. The pressure of the fluids at the time of their merging is p at the branching part B.
They join together at a flow rate of b (qb and Qb shown in the figure) and return to the bathtub 21 from the circulating population 23. At this time, if the water flow resistance of the throttle part 27 is small, the flow rate qb of the bypass path 26 equipped with the filter 28 will decrease, and the filtration performance of the filter 28 will decrease, so the filter 28 is not necessary in the throttle part 27. In order to ensure a sufficient filtration flow rate, large water flow resistance had to be provided.

Problem to be Solved by the Invention However, according to the above configuration, in the first example, the circulation flow rate q of the bypass path is
The relationship between a and the discharge flow rate Qa of the circulation bomb 14 is Qoa=Q a q a -- (1), and the circulation flow rate Qoa of the main circulation path 15 is
The discharge flow rate Qa is smaller than the discharge flow rate Qa. For this reason, filter l8
The circulation flow rate of the main circulation path 15, which is the circulation flow rate of bath water, will be lower than when the filtration effect is not adopted. However, there was a problem that the strength of the jet flow was reduced, the impact force of the bubble flow on the human body was weakened, and the manosurge effect was reduced, and the ability of the circulation pump 14 was not fully demonstrated. ．． Also, bypass to backwash the filter 18! The three-way switching valve 20 and the drain bomb 17 for switching the circuit between the circulation in the filter 16 and the drainage in the drain channel 19 provide unnecessary resistance to the passage of the circulating water during filtration to flow the circulating water to the filter 18. There was an issue.

In the second example, when the bath water is simply circulated without providing the high bath path 26, for example, the circulation flow rate when the circulation volume 23 is a jet nozzle is Q. . Compared to when the circulation flow rate Qob of the main circulation path 25 shown in
is smaller than Qoo.

This is achieved by providing a constriction section 27 in a part of the main circulation path 25 to increase water flow resistance.
This is because the overall water flow resistance increases and the discharge flow rate of the circulation pump 24 decreases. Expressing the relationship between these flow rates using the formula, Qoo>Qob=Qb+qb ・−−−−− (2
).

In this way, the filter 2
There was a problem in that if a bypass path was added in the middle, the ability of the circulation pump 24 could not be utilized to its full potential. The present invention solves the above-mentioned conventional problems, and includes a jet bubble bath device incorporating a filtration function using a filter.
The first objective is to maximize the ability of the circulation pump that generates jet bubbles.

The second purpose is to remove the switching valve that switches the flow path for backwashing the filter from the bypass path, and to reduce water flow resistance in the bypass path during filtration.

Means for Solving the Problems In order to achieve the above object, the first means of the present invention is to provide a circulation outlet for taking bath water out of the bathtub, and a first circulation pump in the middle so that water flows out from the circulation outlet. a main circulation path for circulating bathtub water; a jet nozzle for returning circulating water from the main circulation path to the bathtub; the jet nozzle and the circulation outlet being attached to a side wall of the bathtub and connected to the main circulation path; A second circulation pump is installed in the main circulation path on the discharge side of the first circulation pump.
The cycle of A bypass line with a ring pump and a filter is installed in parallel.

Moreover, in the second means, a drainage channel equipped with a solenoid valve in the middle is connected to a branch part provided in a bypass channel between the second circulation pump and the filter. Effect By the first means described above, the bubble bath circulation device of the present invention eliminates the influence of the bypass path installed in parallel to the main circulation when the first circulation pump is driven while the second circulation bomb is stopped. The jet nozzle injects the same amount of jet bubbles into the bathtub as when the circuit is configured with only the main circulation path and no bypass path. Further, when the first circulation pump and the second circulation pump are driven together, the same bath water as in the previous operation is circulated in the main circulation path, the same jet flow of jet bubbles as in the previous operation is obtained, and , a part of the circulating water in the main circulation path flows through the bypass path, passes through the filter, becomes clean due to the filtration action, and joins the flow in the main circulation path again, making the water more clean than before being diverted to the bypass path. The clean circulating water returns to the bathtub from the jet nozzle, and this operation is repeated, gradually making the entire bathtub water cleaner. However, as filtration progresses, filtration removed from dirty circulating water accumulates in the filtration action section within the filter, resulting in a decrease in filtration performance.

Therefore, by opening the solenoid valve provided in the drainage channel using the second means, keeping the second circulation pump in a stopped state, and driving only the first circulation pump, the bathtub water will circulate in the main circulation channel and A part of the circulating water flowing through the circulation path flows through the filter in the opposite direction to the above-mentioned filtration action, and the filth accumulated in the filtration action part is discharged from the drainage channel to the outside of the device, and the filter resumes its filtration function. Recovered and regenerated.

Example An embodiment thereof will be described below with reference to FIG.

Reference numeral 1 designates a bathtub, and a circulation outlet 2 for discharging bathtub water from the bathtub 1 to the outside and a jet nozzle 3 for circulating water from the outside and returning it to the bathtub 1 are attached to a perforation in the side wall of the bathtub.
and the jet nozzle 3 are connected by a main circulation path 5. The main circulation path 5 includes a first circulation pump 4 that circulates bath water;
Branch parts A and B are provided on the discharge side of the first circulation pump 4. Note that an air pipe 3a is connected to the jet nozzle 3 to an air pipe connection port (not shown) that is different from the connection port to the main circulation path 5, and water flow generated by the water flow passing through the jet nozzle 3 from the main circulation path 5 is connected to the jet nozzle 3. Due to the ejector effect, air is sucked through the air pipe 3a and mixed into the water stream inside the jet nozzle 3, and a water stream containing air bubbles is injected into the bathtub l.

Next, a bypass passage 6 is connected to the branch parts A and B provided in the main circulation passage 5, and a bypass passage 6 is connected in the middle of the bypass passage 6 in order to flow part of the circulating water flowing through the main circulation passage 5 to the bypass passage 6. Two circulation bombs 7 are provided. Furthermore, a filter 8 is provided on the discharge side of the second circulation pump 7 in the middle of the bypass path 6 to filter and clean the circulating water flowing through the bypass path 6. Further, a branch part C is provided between the second circulation pump 7 of the bypass passage 6 and the filter 8, and a drain groove 9 is provided from this branch part C.
A drain channel 9 for discharging waste water is connected to the branch part C, and a solenoid valve 10 is provided in the middle of the drain channel 9.

The operation of this embodiment in the above configuration will be described below. First, when the second circulation pump 7 is stopped and only the first circulation pump 4 is driven, the bathtub water circulates through the main circulation path 5, and the jet nozzle 3 pumps jet bubbles, which is a water stream containing air bubbles, into the bathtub. Inject into the inside of 1. At this time, the bypass path 6
is connected to the main circulation path 5 at branch parts A and B in a state where water can flow through it, but since a filter 8 with a large water flow resistance is installed in the bypass path 6, the circulating water flows through the water flow resistance. flows only through the small main circulation path 5a. Therefore, unlike the conventional example, although the bypass passage 6 is added to the main circulation passage 5, the present embodiment has the same effect as the case where the bypass passage 6 is not added. The ability of the first circulation pump 4 is maximized without any change in pressure or flow rate. In this way, a jet bubble bath without filtration can be performed.

Next, regarding the operation of the bypass path 6 provided with the filter 8,
This will be explained with reference to FIG. 2(a). When the first circulation bomb 4 is driven, the bathtub water flows through the main circulation path 5 as shown by the arrow in the figure.
is circulated between the bathtub 1 and the bathtub 1 at a circulating flow rate of QO, and the jet nozzle 3 injects a jet stream into the bathtub 1. Therefore, when the second circulation pump 7 is driven, a part of the circulating water in the main circulation path 5 whose circulation flow rate is indicated by qo flows through the bypass path 6, and the remaining circulating water flows into the branch part as the circulation flow rate Q1. It flows through the main circulation path 5a between A and B, and joins again at branch B. The relationship between each circulation flow rate at this time is Qo
=Q+ +q o (3), and the discharge amount of the first circulation pump 4 is the circulation flow rate Qo of the main circulation path 5.
is equal to Furthermore, this circulation flow IQo is the circulation flow rate Q0 of the main circulation path when the bypass path 6 is not incorporated into the main circulation path 5. is equal to

In order to operate in this manner, unlike the second conventional example described above, in this embodiment, the main circulation path 5a is not provided with a part that causes water flow resistance such as a constriction part, and the water flow resistance is minimized. By making only the piping resistance Ro act, the water flow resistance R of the bypass passage 6 is made as small as possible and brought close to the piping resistance Ro.

This water flow resistance R is determined by the water flow loss Rf of the filter 8 when flowing at a flow rate qo that allows the filter 8 to sufficiently perform the necessary filtration action, and other piping resistances in the bypass path 6. Rp, and between these resistances,
There is a relationship of Ro<R=Rf×Rp. For example, when there are four jet nozzles, Qoζ 80 l/min and the main circulation path diameter is 32 A, when R o <0.1 mAg and a filtration flow rate of at least 20 l/min flows through the filter, Rf! =
Since i3 to 5 mAg is required, R is an order of magnitude larger than Ro, making it impossible to bring R closer to Ro.

Therefore, in order to eliminate this large resistance Rf of the filter from the bypass path resistance R, a second
The resistance R of the bypass path 6 is R=
It became possible to express it as (R f + Rp)-H. As a result, the second circulation pump 7 can reduce the water flow loss Rf of the filter 8.
If the head H is approximately close to , the main circulation path 5a bypass path 6
The water flow resistance between the two pipes becomes only the resistance of each piping, and the difference between them becomes small.

In other words, since the bypass path 6 must have a large water flow resistance portion whose water flow loss is represented by Rf, the bypass path 6 can be constructed by reducing the overall water flow resistance (R=Rr+Rp) of the bypass path 6. To make it easier for some of the circulating water to flow,
As a means of achieving this, a new energy adding device different from the first circulation pump 4 is separately installed in the bypass passage 6. In other words, the filter 8, which is a large resistance to water flow,
Therefore, a negative resistance element sufficient to cancel out this water flow resistance is separately added to the bypass path 6 to reduce the overall water flow resistance R of the bypass path 6, and the main circulation path 5a The objective is to bring the water flow resistance Ro closer to the water flow resistance Ro. What can cause negative water flow resistance is the addition of energy from another source, and the resistance of the circulating water passing through the filter 8 is
For example, the water flow resistance Rf of the circulating water required to pass through the filter 8 is suctioned by a second circulation pump with suction power installed immediately after the filter 8, and the flow resistance Rf of the circulating water required to pass through the filter 8 is If the kinetic energy of the circulating water after passing through the circulation pump No. 2 is the same or higher, even if the filter 8 is incorporated in the bypass path 6, the bypass path 6 can be connected to the main circulation path 5. A part of the circulating water can be passed through. In this way, the second circulation bomb 7 may be installed at a position after the water passes through the filter 8 to exert a suction action on the filter 8, but the second circulation bomb 7
This is not a preferable location for the second circulation pump 7 because the pump chamber containing the impeller becomes negative pressure, which causes cavitation phenomenon and tends to lead to failures such as dry running due to air trapping. In this embodiment, a second circulation pump 7 is arranged on the inlet side of the filter 8 as an alternative position.
The kinetic energy of the circulating water at the point of entry of the second circulation pump 7 and the outlet of the filter 8 is made equal or higher at the outlet of the filter 8, and circulates through the bypass path 6. Allowed water to pass through.

By incorporating the second circulation bomb 7 into the bypass path 6, this embodiment can have new and different features. The capacity of bathtub water has increased in recent years even for household use, with approximately 250
It depends on the level of filtration, but in general, if the filtration flow rate of the filter 8 is set to 202/min as filtration with two circulations, in order to filter this volume of bath water, it is necessary to The required time is 2×250/20=25 (minutes). However, taking into consideration the time required for bathing and the interval between each bather's bathing (assuming that the bathing operation stops during this time), it is desirable that the time required for filtration be about half of this, so the filtration flow rate should be doubled to 40 l/min. It is possible if you do this, and for that you need the second
The capacity of the circulation pump 7 is changed from 50W in the former case to IOOW in the latter case (the head at each flow rate is 4 to 5 + m).
This can be easily achieved by changing to (as Ag). This is also beneficial in terms of parts procurement.The first circulation pump 4, which is a large pump with a small number of models and a narrow selection of capacities, has a commonality, and the second circulation pump 4, which has many models, is a small and medium-sized pump. By using the circulation pump 7 as shown in FIG.

In this way, it is possible to filter the bathtub water or to take a jet bubble bath while filtering the bathtub water.

Next, a method for regenerating the filter 8 will be explained with reference to FIG. First, the first circulation pump 4 is driven to circulate the bath water in the main circulation path 5 in the direction of the arrow, and then the second circulation pump 7 is stopped and the solenoid valve 1 is activated.
If valve 0 is opened only in this case, part of the circulating water flowing through the main circulation path 5, whose circulation amount is represented by q, will be transferred to the branch section B.
The water flows through the filter 8 in the opposite direction to that during filtration. this is,
The resistance of circulating water in the main circulation path 5 passing through the jet nozzle 3 is large, and the pressure in the main circulation path 5 from the discharge port of the first circulation pump 4 to the jet nozzle 3 is high. This is because the pressure difference between the branch part B and the open end of the drain channel 9 becomes large because the valve is opened, and the circulating water indicated by the circulation amount q1 tends to flow to the drain channel 9 side via the filter 8. ．． The second circulation pump 7, which is stopped, has considerable resistance for circulating water to pass through the pump chamber, but due to its structure, it is not completely closed, and the water circulates through the small gap between the impeller and the wall of the bomb chamber. Water passes through, and the circulating water indicated by the circulation amount q2 passes through the bypass path 6 between the branch parts A and C, joins the circulating water that has flowed back through the filter 8 at the branch part C, and flows into the drain channel 9a. 9 is drained with a circulation amount of (qI + 92). In this way, when the circulating water with the amount of circulating water q flows back through the filter 8, the filter 8 is cleaned of the dirt accumulated in the filtration action part by the circulating water and discharged from the drainage channel 9, so that the filter 8 is regenerated. Ru. In addition, since the pressure in the branch A is higher than the pressure of the circulating water containing filth after flowing back through the filter 8, the circulating water flows through the bypass path 6 from the branch C to the branch A.
Therefore, there will be no problem of contamination of the main circulation path 5.

Generally, when a circulation pump is in operation, a negative pressure area is generated due to the rotation of the impeller on the flat surface of the back of the impeller in the pump chamber through which the circulating water does not pass. Due to this negative pressure action, relatively large debris such as hair and cotton waste that has entered the bomb chamber as a result of the circulating water stays in this area, and when the negative pressure section disappears after the bomb is stopped, the debris particles floating in the pump chamber. Therefore, for example, as in the first conventional example, the circulation pump is operated when backwashing the filter, the circulation bomb is stopped when the filter is allowed to perform the filtration action, and the filtered water is circulated inside the circulation pump. If water is allowed to pass through, the above-mentioned phenomenon will be reproduced and problems will occur. In other words, in the conventional example, hair, cotton lint, and other foreign matter contained in the bath water used as wash water for backwashing the filter enters the main circulation path again when filtering the bath water.
In this embodiment, when the filter 8 is backwashed, the second
The garbage in the circulation pump 7 flows to the drain 9,
The advantage is that it can be discarded to a.

In addition, the filter 8 is generally capable of backwashing, for example,
In a type such as a sand filter, the amount of backflow of wash water used for backwashing is smaller than the filtration flow rate, which is the amount of water flowing through the undiluted solution to be filtered for filtration. This is because the specific gravity of sand particles, glass beads, etc. in the filtration area that performs the filtration action is not much higher than that of water, and the particle size is small. This is to prevent problems such as particles from entering the backflow water and flowing out of the filter.

For this purpose, a drainage channel 9 for filtration and backwashing is provided.
The bypass path 6 including the filter is required to have a small water flow resistance during filtration, and a larger water flow resistance during backwashing than during filtration. In the first conventional example, the above requirements are satisfied depending on whether or not the second circulation pump 7 is driven. Therefore, it does not meet the conditions of wanting to reduce unnecessary water flow resistance as much as possible. For this reason, in the present embodiment, a switching valve is not provided in the bypass path, and throttling resistance is provided at the solenoid valve IO portion of the drain path 9 to satisfy the above conditions.

Next, although the bypass passage 6 is provided on the discharge side of the first circulation bomb 4, the reason why it is not preferable to use it in other positions will be explained. For example, when the bypass path is provided in parallel with the first circulation pump as in the first conventional example, the second circulation pump is located between the branch part B and the three-way switching valve 20, as shown in FIG. This means that only the position of the second circulation pump 7 has been changed compared to the first conventional example. However, in this case, when the second circulation pump is stopped during backwashing, the circulating water flowing back through the filter 18 passes through the head of the bathtub water filled in the bathtub 11 (l■A. or less). Since water energy is used, the amount of backflow water becomes too small, which is a problem. Also, if a bypass path is provided on the suction side of the first circulation pump, the second
There is no problem during filtration when the second circulation pump is driven, but even if the second circulation pump is stopped for the purpose of backwashing the filter,
Similar to the previous example, a problem occurs in that not enough backflow water passes through the filter. That is, as in the previous example, the pressure of the first circulation pump as in the present embodiment does not act on the filter, and only the bathtub water level acts as energy to produce backflow water.

Effects of the Invention As is clear from the above explanation, the present invention makes it possible to make maximum use of the ability of the circulation pump to generate jet bubbles using a large-capacity circulation pump. Compared to an example in which a bypass path is not added, it is possible to generate a completely equivalent jet flow.

In other words, according to the present invention, as shown in equation (1) in the first conventional example, the circulation flow rate Qoa of the main circulation path does not become smaller than the discharge flow rate Qa of the circulation pump, and in the second conventional example As shown in equation (2), the circulation flow rate Q0 of the main circulation path when no bypass path is provided. Therefore, the circulation flow rate Q of the main circulation path when the bypass path is incorporated. There is no possibility that b will decrease.

In addition, the present invention provides a bypass path equipped with a filter in the middle.
Since a flow path switching valve such as a three-way valve is not provided, there is little water flow resistance in the bypass path, thereby increasing the amount of circulating water for filtration, which has the effect of improving filtration performance.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the bubble bath circulation device according to the present invention, and FIG. 2 is a diagram showing the flow of circulating water in the embodiment.
The figure (a) shows the time of filtration circulation, and the figure (b) shows the time of filter regeneration. Furthermore, FIGS. 3 and 4 are configuration diagrams showing a conventional filtration and circulation device. 3...Jet nozzle,
4...First circulation pump, 5,5a...
・Main circulation path, 6... Bypass path, 7...
-Second circulation pump, 8...filter.

Claims (2)

[Claims] (1) A main circulation path that circulates bathtub water, a circulation outlet that guides bathwater water from the bathtub to the main circulation path, a jet nozzle that returns circulating water from the main circulation path to the bathtub, and a jet nozzle that returns circulating water from the main circulation path to the bathtub; a first circulation pump which is provided and communicated with the circulation outlet and the jet nozzle; a bypass passage connected in parallel with the main circulation passage on the outlet side of the first circulation pump; and a second circulation pump in the middle of the bypass passage. Bubble bath circulation device with a filter and filter. (2) The bubble according to claim (1), further comprising a drainage channel provided with a solenoid valve in the middle thereof, and the drainage channel is connected to a branch part that receives a bypass channel between the second circulation pump and the filter. Bath circulation device.