JP2000193308A - Bathtub water circulating/purifying apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress propagation of various bacteria in a filtering tank and keeping the inside of a bathtub in hygienic state by sterilizing various bacteria leaked out from the filtering tank. SOLUTION: UV sterilizing units 22 are disposed on the upstream side and downstream side of a filtering tank 30. Alternatively, inserting position of the UV sterilizing unit 22 is switched alternately between the upstream side and downstream side of the filtering tank. The sterilization water channel of one UV sterilizing unit 22 is sectioned into two systems and sterilization is performed both on the upstream side and downstream side of the filtering tank 30. Furthermore, a filtering material is charged to a partial region in the sterilization water channel of the UV sterilizing unit in order to integrate the function as the filtering tank 30 and to UV sterilizing the filtering material itself.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circulation channel having one end extending to a suction port provided in a bathtub and the other end extending to a discharge port to the bathtub, and the circulation channel. Having a circulation pump disposed in the middle of the circulation path, and a filtration tank disposed in the middle of the circulation path, and circulating the water in the bathtub through the circulation path by the circulation pump. The present invention relates to a bath tub water circulation purifier for purifying.

[0002]

2. Description of the Related Art A so-called 24-hour bath apparatus in which bathtub water is passed through a circulation channel passing through a filtration tank to purify the bathtub so that the bathtub can be used for a long time without discarding the water is used. Usually, an ultraviolet lamp is provided at any one of the upstream side and the downstream side of the filtration tank to sterilize various bacteria.

[0003]

As shown in FIG. 6, when the ultraviolet lamp 1001 is installed at one position on the upstream side of the filtration tank 1002, various bacteria which cannot be sterilized when passing through the ultraviolet lamp are used. However, when reaching the filtration tank and proliferating inside the filtration tank, and exceeding a certain amount, there is a risk that various bacteria may overflow from the filtration tank and leak into the bathtub 1000.

On the other hand, as shown in FIG.
If the ultraviolet lamp 1001 is arranged on the downstream side, even if various bacteria leak from the filtration tank, it is sterilized immediately before flowing into the bathtub 1000, so that the amount of various bacteria leaking from the filtration tank is within the sterilization capacity of the ultraviolet lamp, Bathtub water can be kept in a sanitary condition. However, if an ultraviolet lamp is provided only on the downstream side of the filter tank, a large amount of various bacteria will reach the filter tank from the bathtub and propagate, so that more bacteria will leak from the filter tank than if an ultraviolet lamp is provided on the upstream side. If the amount of the effluent increases and this amount exceeds the sterilizing ability of the ultraviolet lamp, there is a possibility that germs may leak into the bathtub.

[0005] The present invention has been made in view of such problems of the prior art, and suppresses the propagation of various bacteria in the filtration tank, and sterilizes the bacteria leaking from the filtration tank without fail. It is an object of the present invention to provide a bath tub water circulation purification device capable of keeping the inside sanitary.

[0006]

The gist of the present invention to achieve the above object lies in the following inventions. [1] A circulation channel (20) having one end extending to a suction port (6) provided in a bathtub (5) and the other end extending to a discharge port (7) to the bathtub (5). And the circulation channel (20)
And a filtration tank (30) arranged in the middle of the circulation channel (20), and the water in the bathtub (5) is arranged by the circulation pump (21). In the bath tub water circulation purifier for circulating water through the circulation channel (20) to purify the water in the filtration tank (30),
A bath tub water circulation purifier, wherein an ultraviolet sterilizer (22) for sterilizing water flowing in the circulation flow path (20) is arranged on both the upstream side and the downstream side of the filtration tank (30). .

[2] A circulation channel having one end extending to a suction port (6) provided in the bathtub (5) and the other end extending to a discharge port (7) to the bathtub (5). (101) and a circulation pump (2) arranged in the middle of the circulation flow path (101).
1) and a filtration tank (30) arranged in the middle of the circulation channel (101), and the water in the bathtub (5) is removed by the circulation pump (21) by the circulation channel (101). A bath tub water circulation purifier that circulates water through the filter tank (30) to purify the water in the filter tank (30); and an ultraviolet sterilizer (110) and the circulation channel (10) of the ultraviolet sterilizer (110).
1) A flow path switching valve (120, 1) for switching the insertion position.
30, 140) and the flow path switching valve (120, 130,
Switching control means (151) for changing the setting state of (140)
And the flow path switching valve (120, 130, 140)
, The ultraviolet sterilizer (110) is connected to the filtration tank (3).
0) or downstream of the filtration tank (30). The switching control means (151) controls the ultraviolet sterilizer (110) according to a predetermined switching condition. The flow path switching valve (120, 13) is set between an upstream sterilization state inserted on the upstream side of the filtration tank (30) and a downstream sterilization state inserted on the downstream side of the filtration tank (30).
0, 140) alternately.

[3] The switching control means (151) switches the setting state of the flow path switching valve (120, 130, 140) between the upstream sterilization state and the downstream sterilization state at regular intervals. The bathtub water circulation purification device according to [2], wherein:

[4] A circulation channel having one end extending to the suction port (6) provided in the bathtub (5) and the other end extending to the discharge port (7) to the bathtub (5). (201) and a circulation pump (2) arranged in the middle of the circulation channel (201).
1) and a filtration tank (30) arranged in the middle of the circulation channel (201), and the water in the bathtub (5) is removed by the circulation pump (21). A bath tub water circulation purifier that circulates water through the filter tank (30) to purify the water flowing in the circulation channel (201). 220) has at least two systems of sterilizing water passages (225, 226) for irradiating the water inside with ultraviolet rays from a common ultraviolet lamp (221), and the circulation channel (201) Tank (30)
More upstream of the ultraviolet sterilizer (220) through one sterilization water passage (225) and downstream of the filtration tank (30), another sterilization of the ultraviolet sterilizer (220). A bathtub water circulation purifier characterized by being set so as to pass through a water passage (226).

[5] A circulation channel having one end extending to a suction port (6) provided in the bathtub (5) and the other end extending to a discharge port (7) to the bathtub (5). (301) and a circulating pump (2) arranged in the middle of the circulation channel (301).
1) and a filtration tank (30) arranged in the middle of the circulation channel (301), and the water in the bathtub (5) is supplied by the circulation pump (21) to the circulation channel (301). A bath tub water circulation purification device for purifying water in the filtration tank (30) by circulating water through the circulation tank (30), comprising an ultraviolet sterilization device (320) for sterilizing water flowing in the circulation channel (301); 320) has a water passage for sterilization in which ultraviolet light from an ultraviolet lamp (321) is irradiated to water inside the water passage, and the water passage for sterilization is a partition through which ultraviolet light and bath water can pass but a filter medium cannot pass. Board (3
24, 325), the filter is divided into an upstream region, a downstream region, and a central region located between these regions, and a filter medium is disposed in the central region. A bath tub water circulation purification device, wherein the water circulation purification device is integrated.

[6] Backwashing, in which water is passed through the sterilizing water passage in a direction opposite to that during a normal filtration operation, is frequently performed at shorter time intervals than usual in order to increase the amount of filter medium exposed to ultraviolet rays. The bathtub water circulation / purification device according to [5], wherein:

The present invention operates as follows. [1]
In the invention described in (1), since the ultraviolet sterilizer (22) is arranged on both the upstream side and the downstream side of the filtration tank (30), the number of germs reaching the filtration tank (30) is reduced. Propagation inside is suppressed, and even if various bacteria leak from the filtration tank (30), they can be killed by the ultraviolet sterilizer (22) arranged on the downstream side, and the inside of the bathtub is kept hygienic. be able to.

In the invention described in [2], the flow path switching valve (1
20, 130, 140) and switching control means (151)
Is provided, the ultraviolet sterilizer (110) is alternately inserted into the upstream or downstream of the filtration tank (30) according to a predetermined switching condition. For example, in the invention described in [3], the switching control means (151)
Sets the setting state of the flow path switching valves (120, 130, 140) on the upstream side of the filtration tank (30) with the ultraviolet sterilizer (11).
The state is switched between the upstream sterilization state in which 0) is inserted and the downstream sterilization state inserted in the downstream at regular intervals.

As described above, since the ultraviolet sterilizer (110) is alternately switched and inserted between the upstream side and the downstream side of the filtration tank (30), the ultraviolet sterilizer (110) is provided on both the upstream side and the downstream side. Compared with the case, the cost of the device is reduced and the size of the device is reduced.

In the invention described in [4], the ultraviolet sterilizer (220) is provided with a common ultraviolet lamp (22).
The system is configured so that at least two systems of sterilization water passages (225, 226) for irradiating the ultraviolet light from 1) to water passing therethrough are provided. And the circulation channel (201) is provided with the ultraviolet sterilizer (2) on the upstream side of the filtration tank (30).
20), through one of the sterilization water passages (225), downstream of the filtration tank (30) with the ultraviolet sterilizer (22).
0) is set so as to pass through another sterilization water passage (226). Therefore, the water that has flowed into the circulation channel (201) from the bathtub (5) is first sterilized by one sterilization water passage (225), passes through the filtration tank (30), and then is filtered by the other one. Is sterilized again in the sterilizing water passage (226) and returned to the bathtub (5).

As described above, one ultraviolet sterilizer (22)
Since the sterilization water passages (225, 226) of (0) are divided into two, and both the upstream side and the downstream side of the filtration tank (30) are sterilized by one ultraviolet sterilizer (220), The bathtub water can be constantly sterilized both upstream and downstream of the filtration tank (30), while reducing the size and cost of the apparatus.

In the invention described in [5], the water passage for sterilization provided in the ultraviolet sterilizer (320) is provided with a partition plate (3).
24, 325), the filter is divided into an upstream region, a downstream region, and a central region located between these regions, and a filter medium (326) is disposed in the central region. Has an integrated structure. Thus, in addition to the sterilization on the upstream side and the downstream side of the filter medium, the filter medium itself can be sterilized by one ultraviolet sterilizer (320) at the same time. Further, the replacement time of the filter medium and the ultraviolet lamp (321) is almost equal to about one year, so that the maintenance can be simplified by integrating the ultraviolet sterilizer (320) and the filtration tank.

[0018] Further, in the invention according to [6], the backwashing in which the water is passed through the sterilizing water passage in the opposite direction to that during the normal filtration operation is performed.
Frequently performed at shorter time intervals than usual to increase the media exposed to UV light. For example, backwashing is performed at intervals of 4 to 6 hours. Thereby, even if there is a portion which is not irradiated with the ultraviolet ray in the state of being precipitated, the filter medium is agitated by the back washing, so that the filter medium can be evenly irradiated with the ultraviolet ray and sterilized.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Various embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a bathtub water circulation purification device 10 according to a first embodiment of the present invention. As shown in FIG. 1, a bathtub water circulation / purification device 10 according to the first embodiment includes a circulation channel 20 that connects between a suction port 6 and a discharge port 7 provided in a bathtub 5. In the middle of the circulation channel 20, a circulation pump 21, an upstream ultraviolet sterilizer 22, a filtration tank 30, and a downstream ultraviolet sterilizer 23 are arranged in this order from the suction port 6 to the discharge port 7. I have.

The upstream ultraviolet sterilizer 22 and the downstream ultraviolet sterilizer 23 are respectively a straight-tube ultraviolet lamp (not shown), a cylindrical quartz tube which covers the periphery thereof concentrically, and a quartz tube surrounding the quartz tube. And a cylindrical outer wall tube concentrically covering the outer wall. The passage between the quartz tube and the outer wall tube is a flow path (water passage for sterilization) for flowing a fluid to be sterilized.

Next, the operation will be described. In a normal filtration operation state, the circulation pump 21 sucks the water in the bathtub 5 from the suction port 6 and sends out the water to the upstream ultraviolet sterilizer 22. The water flowing from the bath 5 into the circulation channel 20 is first sterilized by the upstream ultraviolet sterilizer 22 and reaches the filtration tank 30. Then, the water purified by passing through the filtration tank 30 is sterilized again through the downstream-side ultraviolet sterilizer 23, and is discharged again.
Is returned to the bathtub 5 and circulates.

As described above, sterilization is performed on the upstream side of the filtration tank 30 by the upstream-side ultraviolet sterilizer 22, so that the filtration tank 30 is sterilized.
The number of germs flowing alive is greatly reduced. Therefore, propagation of various germs in the filtration tank can be reduced.

On the other hand, even when the germs leak from the filtration tank 30, the germs are almost killed again by the downstream ultraviolet sterilizer 23 disposed downstream of the filtration tank 30, so that the germs almost disappear and the bath tub is killed. The germs are prevented from leaking into the inside 5, and the bathtub water can be maintained in a sanitary state.

Next, a second embodiment of the present invention will be described. 2 and 3 show a bathtub water circulation / purification device 100 according to a second embodiment. The bathtub water circulation purification device 100 includes a circulation channel 101 that connects between the suction port 6 and the discharge port 7. In the middle of the circulation channel 101, a circulation pump 21, a filtration tank 30, an ultraviolet sterilizer 110, and first to third electric four-way valves 120, 130, and 140 as channel switching valves are arranged. Have been. The ultraviolet sterilizer 110 is the same as the upstream ultraviolet sterilizer 22 or the downstream ultraviolet sterilizer 23 used in the first embodiment.
It has the same structure as.

The circulation channel 101 repeats branching and merging in the middle thereof at first to third electric four-way valves 120, 130, and 140.
It is possible to switch the water flow path from the suction port 6 to the discharge port 7 depending on the setting states of 30 and 140. Each of the first to third electric four-way valves 120, 130, and 140 has four connection ports from a first connection port to a fourth connection port, and at least the first connection port and the fourth connection port are provided. A first connection which is in communication with the second connection port and the third connection port.
The state, the first connection port and the second connection port communicate with each other, and
It is possible to electrically switch to the second state in which the connection port and the fourth connection port communicate with each other.

The connection state of the pipe will be described in more detail.
First, the suction port 6 is connected to the inlet side of the circulation pump 21,
The outlet of the circulation pump 21 is connected to the first connection port 121 of the first electric four-way valve 120. First electric four-way valve 1
The pipe extending from the fourth connection port 124 of the 20 is connected to the third connection port 143 of the third electric four-way valve 140 via the ultraviolet sterilizer 110. Third electric four-way valve 140
The fourth connection port 144 is connected to the entry side of the filtration tank 30,
The pipe extending from the outlet side of the filtration tank 30 is connected to the third connection port 133 of the second electric four-way valve 130. Also the second
The fourth connection port 134 of the electric four-way valve 130 communicates with the discharge port 7.

A pipe extending from the second connection port 122 of the first electric four-way valve 120 is connected to the first connection port 141 of the third electric four-way valve 140. First electric four-way valve 1
20 between the third connection port 123 and the first connection port 131 of the second electric four-way valve 130 and the second electric four-way valve 130
The second connection port 132 and the second connection port 142 of the third electric four-way valve 140 are connected by pipes.

The control unit 150 controls the bathtub water circulation purifying apparatus 10.
0 is a control circuit that centrally controls the operation of CPU 0, CPU (central processing unit), ROM (read only memory), RA
It is composed of a circuit whose main part is M (random access memory). The control unit 150 has a function as a switching control unit 151 that switches and controls the setting states of the first to third electric four-way valves 120, 130, and 140. In addition,
To the control unit 150, through a wiring 152 schematically shown,
The first to third electric four-way valves 120, 130, 140, the circulation pump 21, the ultraviolet sterilizer 110, and the like are connected.

Next, the operation of the bath tub water circulation purifying apparatus according to the second embodiment will be described. Bathtub water circulation purification device 10
0 is the first to third electric four-way valves 120, 130, 140
Depending on the setting state of, the UV sterilizer 110 is
0 and an upstream sterilization state where the ultraviolet sterilizer 110 is inserted downstream of the filtration tank 30 at an appropriate timing. FIG. 2 shows an upstream sterilization state in which the ultraviolet sterilizer 110 is arranged on the upstream side of the filtration tank 30, and FIG. 3 shows a downstream sterilization state in which the ultraviolet sterilization apparatus 110 is arranged on the downstream side of the filtration tank 30, respectively. I have.

In the upstream sterilization state shown in FIG. 2, the first electric four-way valve 120 has a first connection port 121 and a fourth connection port 124.
And the second connection port 122 and the third connection port 123
Are set to the first state in which is communicated. The second electric four-way valve 130 is set in a second state in which the first connection port 131 and the second connection port 132 communicate with each other, and the third connection port 133 and the fourth connection port 134 communicate with each other. Third electric four-way valve 1
40 is set to a second state in which the first connection port 141 and the second connection port 142 communicate with each other and the third connection port 143 and the fourth connection port 144 communicate with each other.

In the state set as described above, the circulation pump 21
When the is driven, the water in the bathtub 5 flows from the suction port 6 through the circulation pump 21 to the first connection port 121 of the first electric four-way valve 120 to the fourth connection port 124, and the water in the ultraviolet sterilizer 110 is Via the third electric four-way valve 140, the gas flows from the third connection port 143 to the fourth connection port 144, and flows into the inlet of the filtration tank 30. After being purified in the filtration tank 30, the third connection port 1 of the second electric four-way valve 130
33, the fourth connection port 13 of the second electric four-way valve 130
4 and flows into the bathtub 5 through the discharge port 7.

On the other hand, in the downstream sterilization state, in the first electric four-way valve 120, the first connection port 121 and the second connection port 122 communicate with each other, and the third connection port 123 and the fourth connection port 124 communicate with each other. Is set to the second state. Further, the second electric four-way valve 130 is set to a first state in which the first connection port 131 and the fourth connection port 134 communicate with each other, and the second connection port 132 and the third connection port 133 communicate with each other. Third electric four-way valve 140
Is connected to the first connection port 141 and the fourth connection port 144,
In addition, the first connection state is set in which the second connection port 142 and the third connection port 143 communicate with each other.

In the state set as described above, the circulation pump 21
, The water in the bathtub 5 flows from the suction port 6 via the circulation pump 21 to the first connection port 121 of the first electric four-way valve 120 to the second connection port 122, and further the third electric four-way valve The valve 140 is connected from the first connection port 141 to the fourth connection port 144.
To the inlet side of the filtration tank 30. Filtration tank 30
After being purified by the filter tank 30, it enters the third connection port 133 of the second electric four-way valve 130 from the outlet side of the filtration tank 30, exits from the second connection port 132 of the second electric four-way valve 130, and 3 from the second connection port 142 to the third connection port 1
43, via the ultraviolet sterilizer 110, to the fourth connection port 124 of the first electric four-way valve 120.

Then, the first electric four-way valve 120 passes from the fourth connection port 124 to the third connection port 123, and
Of the electric four-way valve 130 from the first connection port 131 to the fourth connection port 134 and flows into the bathtub 5 from the discharge port 7. Here, the switching control unit 151 switches between the upstream sterilization state and the downstream sterilization state every time a predetermined time elapses.

As described above, whether the ultraviolet sterilizer 110 is inserted upstream or downstream of the filtration tank 30 is alternately switched, so that the ultraviolet sterilizer can be installed on both the upstream and downstream sides of the filtration tank 30. As compared with the case where the device is provided, the cost of the device can be reduced and the size of the device can be reduced. If the switching timing is set appropriately, both the propagation of various bacteria in the filtration tank 30 and the outflow to the bathtub 5 can be appropriately prevented, and the bathtub water can be maintained in a sanitary state.

Next, a third embodiment of the present invention will be described. FIG. 4 shows a bathtub water circulation / purification device 200 according to a third embodiment of the present invention. As shown in FIG. 4, a bathtub water circulation purification device 2 according to the third embodiment
Reference numeral 00 includes a circulation channel 201 that connects the suction port 6 and the discharge port 7 provided in the bathtub 5. The circulation pump 21 and the electric four-way valve 21
0, split type ultraviolet sterilizer 220, filtration tank 30,
An electric three-way valve 230 is arranged.

The split type ultraviolet sterilizer 220 includes a straight tube type ultraviolet lamp 221, a cylindrical quartz tube 222 concentrically covering the periphery thereof, and a cylindrical tube 222 concentrically covering the periphery of the quartz tube. And an outer wall tube 223 having a cylindrical shape. The space between the quartz tube 222 and the outer wall tube 223 is a sterilizing water passage for flowing a fluid to be sterilized. This sterilization water passage is divided vertically by a partition wall 224, and two systems including a first sterilization water passage 225 above the partition wall 224 and a second sterilization water passage 226 below the partition wall 224. It constitutes a water channel.

The electric four-way valve 210 has first to fourth connection ports 211 to 214, like the first to third electric four-way valves 120, 130, 140, and the first connection port 211 and the fourth The first state in which the connection port 214 is in communication and the second connection port 212 and the third connection port 213 are in communication, the first connection port 211 is in communication with the second connection port 212, and the third connection port 213 is in communication. And the second state in which the fourth connection port 214 is in communication with the second connection port 214.

The electric three-way valve 230 has first to third connection ports 231 to 233, and the first connection port 231 and the second connection port 232 communicate with each other to close the first connection port 233. The second communication state and the second third communication state in which the second connection port 232 and the third connection port 233 communicate with each other and the first connection port 231 is closed can be electrically driven.

During normal filtration operation, the electric four-way valve 210
Is set to a first state in which the first connection port 211 and the fourth connection port 214 communicate with each other and the second connection port 212 and the third connection port 213 communicate with each other. The communication state is set. When the circulation pump 21 is driven in this state, bathtub water flows in from the suction port 6, and the electric four-way valve 210 is connected through the circulation pump 21 to the fourth connection port 211 through the fourth connection port 211.
After passing through the connection port 214, the first sterilization water passage 2
When passing through the filter 25, it is sterilized and reaches the filtration tank 30.

After being purified in the filtration tank 30, it passes through the second water passage for sterilization 226 and is sterilized again, and then passes through the electric four-way valve 210 from the second connection port 212 to the third connection port 213. The electric three-way valve 230 is connected from the second connection port 232 to the first
It flows to the connection port 231 and is discharged from the discharge port 7 to the bathtub.

As described above, the water passage for sterilization disposed around one ultraviolet lamp 221 is divided into upper and lower, left and right, etc.
Since the system is a system, the bathtub water can be constantly sterilized on both the upstream and downstream sides of the filtration tank while miniaturizing the equipment and reducing the price, and the bathtub water can be kept in a sanitary condition. it can.

The electric four-way valve 210 is connected to the first connection port 2
11 and the second connection port 212 communicate with each other, and the third connection port 2
When the circulating pump 21 is driven by setting the electric three-way valve 230 to the second and third communication states, and the filter tank 30 is back-washed with bath water, The water after washing can be discharged to the outside.

Next, a fourth embodiment of the present invention will be described. FIG. 5 shows a bathtub water circulation purifier 300 according to a fourth embodiment of the present invention. As shown in FIG. 5, a bathtub water circulation purification device 3 according to a fourth embodiment.
00 is provided with a circulation flow path 301 connecting the suction port 6 and the discharge port 7 provided in the bathtub 5, and in the middle thereof, a circulation pump 21, an electric four-way valve 210, and an ultraviolet sterilizer integrated with a filtration tank. 320 and an electric three-way valve 230 are arranged.

The ultraviolet sterilizer 320 integrated with a filtration tank is
The split type ultraviolet sterilizer 22 shown in the third embodiment.
0, a straight tube type ultraviolet lamp 321, a cylindrical quartz tube 322 covering the periphery thereof concentrically, and a cylindrical outer wall tube covering the periphery of the quartz tube concentrically 323, and a quartz tube 322 and an outer wall tube 3
The space between the passages 23 and 23 is a sterilization water passage.

The water passage for sterilization is divided into three regions by a transparent upper partition plate 324 having a large number of small holes through which the filter medium does not pass, and a lower partition plate 325 having the same structure. That is, the upper partition plate 324
It is divided into three regions: an upper upstream region, a central region between the upper partition plate 324 and the lower partition plate 325, and a downstream region below the lower partition plate 325.

The upper partition plate 324 and the lower partition plate 325
A filter medium 326 is loaded in a central area between the two, and bathtub water is filtered in this part. Filter medium 32
No. 6 is loaded in such an amount that a sufficient space 327 between the upper partition plate 324 and the upper partition plate 324 can be secured in a settled state.

During normal filtration operation, the electric four-way valve 210
Is set to a second state in which the first connection port 211 and the second connection port 212 communicate with each other and the third connection port 213 and the fourth connection port 214 communicate with each other. The communication state is set. When the circulation pump 21 is driven in this state, bathtub water flows in from the suction port 6, passes through the electric four-way valve 210 via the circulation pump 21 from the first connection port 211 to the second connection port 212, and is integrated with the filtration tank. UV sterilizer 3
20 flows into the upper end of the upstream region of the disinfecting water channel.

The bathtub water flowing into the filter tank integrated UV sterilizer 320 flows through the sterilizing water passage from the upstream region to the central region and the downstream region. At this time, the bathtub water is first sterilized in the upstream region, then purified by the filter medium 326 in the central region, and sterilized again in the downstream region.

The bath water discharged from the lower end of the downstream region of the ultraviolet sterilizer 320 integrated with the filter tank is supplied to the electric four-way valve 2.
10 passes from the fourth connection port 214 to the third connection port 213, passes through the electric three-way valve 230 from the second connection port 232 to the first connection port 231, and is returned from the discharge port 7 to the bathtub 5.

As described above, the function as a filtration tank is integrated with the ultraviolet sterilizer 300 and the filter medium 326 is formed.
Is disposed in the central area of the sterilizing water channel, so that the filter medium 32
Bath water can be sterilized both upstream and downstream of the bath. Further, the upper surface portion and the lower surface portion of the filter medium 326 are simultaneously sterilized by the ultraviolet lamp 321. That is, the upper partition plate 324 and the lower partition plate 325
Is made of a transparent member (for example, quartz glass or the like) through which ultraviolet light can pass, so that the upper and lower surfaces of the filter medium 326 settled in the central region are irradiated with ultraviolet light, and the filter medium is sterilized. Also, the inner peripheral portion of the filter medium 326 facing the quartz tube 322 is sterilized by ultraviolet rays.

Further, a control unit (not shown) controls the electric four-way valve 210, the electric three-way valve 230, and the circulating pump 21 to perform the backwashing of the filter medium 326 at a predetermined timing. That is, the electric four-way valve 210 is set in a state where the first connection port 211 and the fourth connection port 214 communicate with each other and the second connection port 212 and the third connection port 213 communicate with each other. (2) By setting the third communication state and driving the circulation pump 21, backwashing is performed.

By this back washing, the bath water flows through the ultraviolet sterilizer 320 integrated with the filter tank from the downstream area to the upstream area, and is then discharged to the outside. When water flows from the downstream region side to the upstream region side in the ultraviolet sterilizer 320 integrated with the filtration tank in this way, the internal filter medium 326 is stirred, and the parts sterilized by the ultraviolet light are replaced.

The controller performs such backwashing more frequently than usual. Normally, backwashing is performed about once a day, but here, backwashing is performed at intervals of 4 to 6 hours. Frequent backwashing increases the amount of filter media that is exposed to UV radiation and evenly sterilizes all filter media.

Since sterilization of bath water and sterilization of the filter medium can be performed at the same time, separate sterilization processing for the filter medium (for example, heat sterilization processing in which hot water at about 65 ° C. is passed through a filtration tank for a predetermined time) is omitted or simplified. This makes it possible to simplify the sterilizing mechanism and reduce the cost of the apparatus. In addition, the replacement time of the filter medium and the UV lamp is almost equal to about one year, so by integrating the UV sterilizer and the filtration tank, they can be replaced at once.
This can contribute to simplifying maintenance.

In the embodiment described above, a heater and the like for heating the bathtub water to keep it warm are omitted. In addition,
The heating mechanism is not limited to an electric heater, and may be a mechanism that burns a gas and heats the gas through a heat exchanger.

In the second embodiment, the upstream sterilization state and the downstream sterilization state are alternately switched every time a predetermined time elapses. However, the switching timing is not limited to this. For example, when hot water of about 65 ° C. is passed through the filtration tank for a predetermined time to thermally sterilize the filter medium in the filtration tank, the path may be switched at the following timing. That is, immediately after the heat sterilization, almost no germs survive in the filtration tank, and thus there is a low possibility that the germs leak out of the filtration tank. Therefore, the upstream sterilization state is set until a certain time elapses after the heat sterilization. This allows
Since bacteria that reach the filtration tank are reduced, the inside of the filtration tank can be maintained for a long time in a state with few bacteria.

On the other hand, after a certain period of time after the heat sterilization,
The number of bacteria in the filter tank increases, and the possibility that the bacteria leak from the filter tank increases. Therefore, after a certain period of time has elapsed after performing the heat sterilization treatment, a downstream sterilization state is set, and the ultraviolet sterilizer 110 is disposed downstream of the filtration tank. Thereby, even if various germs leak from the filtration tank, they are sterilized by the ultraviolet sterilizer, so that the germs are prevented from flowing into the bathtub. That is, when there is little germ in the filtration tank, the state is set to the upstream sterilization state, and after the number of germs in the filtration tank increases and the possibility of leakage increases, it is preferable to switch to the downstream sterilization state.

The piping paths shown in the embodiments are merely examples and the present invention is not limited to these. For example, in the second embodiment, if the insertion position of the ultraviolet sterilizer 110 can be switched between the upstream side and the downstream side of the filtration tank 30,
The number and arrangement of the paths and the switching valves are not limited to those illustrated in FIGS. 2 and 3.

[0060]

According to the bath tub water circulation purifying apparatus of the present invention, ultraviolet sterilization is performed on both the upstream side and the downstream side of the filter tank. Since various bacteria leaked from the tank are also sterilized downstream,
The inside of the bathtub can be kept hygienic.

Further, since the replacement time of the ultraviolet lamp and the filter medium almost coincides with each other, if the filtration tank and the ultraviolet sterilizer are integrated, these replacements can be completed by replacing only one part, thus facilitating maintenance. Can be achieved. Further, in the integrated one, the filter medium itself is sterilized by ultraviolet rays, so that a separate sterilization mechanism for the filter medium can be omitted or simplified.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a bathtub water circulation purification device according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a bathtub water circulation / purification device according to a second embodiment of the present invention, in which an ultraviolet sterilizer is inserted upstream of a filtration tank.

FIG. 3 is an explanatory view showing a bathtub water circulation / purification device according to a second embodiment of the present invention, in which an ultraviolet sterilizer is inserted downstream of a filtration tank.

FIG. 4 is an explanatory view showing a bathtub water circulation purification device according to a third embodiment of the present invention.

FIG. 5 is an explanatory view showing a bathtub water circulation purification device according to a fourth embodiment of the present invention.

FIG. 6 is an explanatory view showing a conventional bathtub water circulation purification device having an ultraviolet sterilizer upstream of a filtration tank.

FIG. 7 is an explanatory view showing a conventional bathtub water circulation purification device having an ultraviolet sterilizer downstream of a filtration tank.

[Explanation of symbols]

 Reference Signs List 5 bathtub 6 suction port 7 discharge port 10, 100, 200, 300 bathtub water circulation purification device 20, 101, 201, 301 circulation channel 21 circulation pump 22, 23, 101 ultraviolet sterilization device 30 Filtration tanks 120, 130, 140, 210 Electric four-way valve 150 Control unit 151 Switching control unit 220 Divided ultraviolet sterilizer 221 321 Ultraviolet lamp 222 322 Quartz tube 223 323 External wall tube 224 Partition wall 225 ... First sterilization water passage 226 ... Second sterilization water passage 230 ... Electric three-way valve 320 ... Filtration tank integrated type UV sterilizer 324 ... Upper partition plate 325 ... Lower partition plate 326 ... Filter material 327 ... Ample space

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Kiyoshi Hanazawa 3-4 Fukamidai, Yamato City, Kanagawa Prefecture Inside Gaster Co., Ltd. (72) Inventor Tomoyoshi Amagasa 3-4 Fukamidai, Yamato City, Kanagawa Prefecture F in Gaster Co., Ltd. Terms (reference) 3L024 CC02 DD01 DD27 DD32 DD34 GG41 HH44 HH48

Claims (6)

[Claims] 1. A circulation channel having one end extending to a suction port provided in a bathtub and the other end extending to a discharge port to the bathtub, and a circulation channel arranged in the middle of the circulation channel. A bathtub water circulation purification device, comprising: a pump and a filtration tank disposed in the middle of the circulation channel, wherein the circulation pump circulates water in the bathtub through the circulation channel to purify the water in the filtration tank. A bathtub water circulation purification device, wherein an ultraviolet sterilizer for sterilizing water flowing in the circulation channel is disposed on both the upstream side and the downstream side of the filtration tank. 2. A circulation channel having one end extending to a suction port provided in a bathtub and the other end extending to a discharge port to the bathtub, and a circulation channel disposed in the middle of the circulation channel. A bathtub water circulation purification device, comprising: a pump and a filtration tank disposed in the middle of the circulation channel, wherein the circulation pump circulates water in the bathtub through the circulation channel to purify the water in the filtration tank. An ultraviolet sterilizer, a flow path switching valve that switches an insertion position of the ultraviolet sterilizer into the circulation flow path, and a switching control unit that changes a setting state of the flow path switching valve; Switches between inserting the ultraviolet sterilizer to the upstream of the filtration tank or inserting the ultraviolet sterilizer downstream of the filtration tank, and the switching control means switches the ultraviolet sterilizer according to a predetermined switching condition. Insert upstream of filtration tank Bath water circulation purifying apparatus, characterized in that to switch alternately upstream sterility and the flow path switching valve and the downstream sterility to be inserted downstream of the filter tank that. 3. The bathtub according to claim 2, wherein said switching control means switches a setting state of said flow path switching valve between said upstream sterilization state and said downstream sterilization state at predetermined time intervals. Water circulation purification device. 4. A circulation channel having one end extending to a suction port provided in the bathtub and the other end extending to a discharge port to the bathtub, and a circulation channel arranged in the middle of the circulation channel. A bathtub water circulation purification device, comprising: a pump and a filtration tank disposed in the middle of the circulation channel, wherein the circulation pump circulates water in the bathtub through the circulation channel to purify the water in the filtration tank. An ultraviolet sterilizer for sterilizing water flowing in the circulation flow path, wherein the ultraviolet sterilizer has at least two sterilizing water passages through which ultraviolet light from a common ultraviolet lamp is applied to internal water.
The circulation flow path passes through a sterilization water passage of one of the ultraviolet sterilizers on the upstream side of the filtration tank and another of the ultraviolet sterilizer on the downstream side of the filtration tank. A bath tub water circulation purifier characterized by being set so as to pass through a sterilizing water passage. 5. A circulation channel having one end extending to a suction port provided in the bathtub and the other end extending to a discharge port to the bathtub, and a circulation channel disposed in the middle of the circulation channel. A bathtub water circulation purification device, comprising: a pump and a filtration tank disposed in the middle of the circulation channel, wherein the circulation pump circulates water in the bathtub through the circulation channel to purify the water in the filtration tank. An ultraviolet sterilizer for sterilizing water flowing in the circulation channel, the ultraviolet sterilizer has a sterilization water passage in which ultraviolet light from an ultraviolet lamp is irradiated to internal water, The water passage is divided into an upstream region, a downstream region, and a central region located between these regions by a partition plate through which ultraviolet light and bathtub water can pass and a filter medium cannot pass, and the central region is divided into three regions. Filter material is placed Bath water circulating purification device, characterized in that a which has been one in which the function as the filter tank are integrated. 6. The method according to claim 6, wherein the backwashing is performed by passing water through the sterilizing water passage in a direction opposite to that in a normal filtration operation at a time interval shorter than usual in order to increase the amount of filter medium exposed to ultraviolet rays. The bathtub water circulation purification device according to claim 5, characterized in that: