JPH09131U - Circulation purification device for bath - Google Patents

Abstract

(57) Abstract: Circulation purification for a bath, which can simplify the airtight structure of a filtration tank, can easily open and close the airtight lid, and significantly improves the operability when washing or replacing the filter medium. Provide a device. SOLUTION: A filtration tank 4 is provided in an upper part of an apparatus main body 3,
A circulation pump connected to the downstream side of the filtration tank 4 is arranged in the lower part, and the filtration tank 4 has a tank main body 8 into which a filter medium is freely inserted and removed from an opening 9 at an upper end, and an opening of the tank main body 8. 9 is provided with a sealing lid 10 which is detachably attached from the upper side, and a circumferential groove 52 for fitting the packing 21 is provided on the upper surface side of the upper end side of the tank body 8, and the sealing lid 10 is attached to the packing 21 from the upper side. The outer peripheral flange portion 53 that abuts and the outer peripheral flange portion
A fitting portion 54 provided on the inner peripheral side of 53 and detachably fitted in the opening 9 of the tank main body 8 and a curved portion formed on the inner peripheral side of the outer peripheral flange portion 53 so that the central portion becomes higher. The curved lid portion 56 is provided, and the release valve 24 for releasing the negative pressure is provided substantially at the top of the curved lid portion 56.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a circulation purification device for a bath, in which water in a bathtub is pumped into a filtration tank by a circulation pump, and water after being filtered by a filter material in the filtration tank is returned to the bathtub.

[0002]

[Prior art]

 As a circulation purification device for a bath, as described in JP-A-63-28418, water in a bathtub is pumped into a filtration tank by a circulation pump, and after filtering by a filtration material in the filtration tank. There is a so-called circulation type in which the water of the above is returned to the bathtub. When purifying water by passing it through the filter media in the filtration tank, the purification capacity is limited only by allowing the pumped water to naturally flow in the filter tank and passing through the filter media.

Therefore, conventionally, a filtration tank having a closed structure is configured by a tank body and a closed lid that is openably and closably attached to the opening of the tank body. A circulation pump is installed on the side, and the water in the bath tank is pumped by the circulation pump through the suction pipe and sent under pressure into the filtration tank, forcing the water to pass through the filter media in the filtration tank to improve the purification capacity. I am raising.

[0004]

[Problems to be solved by the device]

 In the conventional purification device, a circulation pump for pumping the water in the bath into the filtration tank is located upstream of the filtration tank, and the circulation pump is used to pump water into the sealed filtration tank. Since the filtration tank is constantly under pressure while the circulation pump is operating, when installing the sealing lid on the opening of the tank body so that it can be opened and closed freely, keep the sealing lid closed to prevent water in the filtration tank from leaking to the outside. Since it is necessary to fix the tank body with multiple screws, there is a drawback that the sealing structure of the filtration tank becomes very complicated.

Further, it is necessary to periodically remove the filter material from the filter tank and wash or replace it. However, in the conventional purification device, the sealing lid is completely fixed to the tank body with multiple screws, so when attaching or removing the sealing lid, loosen all the screws and remove , Each screw must be tightened, and its operation is very complicated.

[0006] Accordingly, in the conventional purification device, since handling is complicated and lacks in operability and handleability, not only time is required for cleaning or replacement of the filtering material, but also the cleaning or replacement time of the filtering material is delayed. However, there is a problem that the function as a purification device cannot be fully exerted. In view of such conventional problems, the present invention can simplify the airtight structure of the filtration tank, easily open / close the airtight lid, and significantly improve the operability when cleaning or replacing the filter medium. The purpose of the present invention is to provide a circulation purifying device for use in water.

[0007]

[Means for Solving the Problems]

 According to the present invention as set forth in claim 1, the water in the bathtub 2 is pumped into the filtration tank 4 by the circulation pump 5, and the water after being filtered by the filtration material 7 in the filtration tank 4 is returned to the bathtub 2. In the bath circulation purification device, the filtration tank 4 is arranged in the upper part of the device body 3, and the circulation pump 5 connected to the downstream side of the filtration tank 4 is arranged in the lower part of the device body 3, and the filtration tank 4 is A bottomed tank body 8 into which the filter material 7 is freely inserted and removed from the opening 9 side at the upper end, and a sealing lid 10 which is detachably mounted from the upper side in the opening 9 of the tank body 8 are provided. An upper cover 20 that covers the filtration tank 4 from the upper side is detachably attached to the upper end of the device main body 3, and the opening 9 of the tank main body 8 extends over the entire circumference on the upper end side of the tank main body 8. A surrounding groove 52 is provided to surround it, and the packing 21 is fitted around the entire circumference of the surrounding groove 52, The sealing lid 10 is provided with an outer peripheral flange portion 53 that comes into contact with the packing 21 from above, and a fitting portion that is provided on the inner peripheral side of the outer peripheral flange portion 53 and is detachably fitted into the opening portion 9 of the tank body 8. 54 and a curved lid portion 56 that is curved and formed on the inner peripheral side of the outer peripheral collar portion 53 so that the central portion becomes higher. A release valve 24 for releasing the valve is provided.

A second aspect of the present invention is the device according to the first aspect, wherein the release valve 24 has a valve hole 57 formed in a vertical direction at the top of the curved lid portion 56, and the valve hole 57. And a valve element 58 that can be operated from the outside.

[0009]

[Embodiment of the invention]

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 to 3 exemplify one embodiment of the present invention, FIG. 1 is a schematic view showing the configuration of a purification device 1, FIG. 2 is a cross-sectional view showing the structure of the main part of the purification device 1, and FIG. 3 is a purification device. FIG. 3 is a cross-sectional view showing a usage state in which 1 is attached to a bathtub 2 in a bathroom. As shown in FIG. 1, the purification device 1 includes a device body 3, and a filtration tank 4 and a circulation pump 5 which are vertically arranged in the device body 3. The device body 3 is mounted on the corner portion 6 of the bathtub 2, as shown in FIG.

The filtration tank 4 is used to fill the filtration material 7, and has a bottomed tank body 8 in which the filtration material 7 can be freely inserted and removed, and an opening 9 is opened on the tank body 8. It is composed of a sealing lid 10 which is detachably mounted so as to be closed. As the filter material 7, for example, a fired product such as granular ceramics is generally used, and the filter material 7 purifies the water pumped from the bath 2 to the filter tank 4. The filter material 7 is preferably placed in a dedicated container so that it can be easily put in and taken out from the tank body 8 of the filtration tank 4. As shown in FIG. 2, a filter 12 for removing hair and the like is provided on the upper side of the filter material 7.

A suction pipe 13 is connected to an upper portion of a peripheral wall of the tank body 8, and a suction side of the circulation pump 5 is connected to a bottom portion of the tank body 8 via a connection pipe 14. The suction pipe 13 has a suction portion 15 at the lower end, and the suction portion 15 is immersed in the water in the bathtub 2. In addition, in the suction unit 15, when the operation of the circulation pump 5 is stopped by washing the filter material 7 or the like, the water filled in the suction pipe 13 between the filter tank 4 and the suction tank 13 flows back into the bathtub 2. A check valve is provided to prevent it from flowing out.

The circulation pump 5 is for pumping the water in the bathtub 2 into the filtration tank 4 via the suction portion 15 of the suction pipe 13, and is arranged below the filtration tank 4 inside the apparatus main body 3. Has been done. The discharge side of the circulation pump 5 is provided with a discharge pipe 17 through an inverted U-shaped pipe 16 bent in an inverted U-shape so that the water after being purified by the filter material 7 of the filtration tank 4 is returned to the bathtub 2. It is connected to the. The discharge pipe 17 has a discharge portion 18 at the lower end, and the discharge portion 18 is immersed in the water in the bathtub 2.

It should be noted that the discharge unit 18 itself may be a mere opening in which the lower end of the discharge pipe 17 is cut, or may be a spray nozzle for spraying purified water. When a jet nozzle is provided in the discharge part 18, an air pipe whose one end is open to the atmosphere is connected to the jet nozzle so that bubbles are jetted into the water in the bathtub 2 together with the purified water. It may be a jet injection type. Further, a reciprocating pump, a centrifugal pump, etc. are used as the circulation pump 5, and any structure may be used.

As shown in FIG. 2, the apparatus main body 3 has a case shape with an open upper end, the tank main body 8 is fitted to the opening side, and a fitting step portion 49 formed on the outer circumference of the upper end portion. The upper cover 20 is fitted so as to be detachably fitted from the upper side. The upper cover 20 has a flat upper surface.

As shown in FIG. 2, the tank body 8 has a lid receiving portion 50 integrally projecting outward from the upper end of the tank main body and having a flat upper surface, and an outer periphery of the lid receiving portion 50. To a cylindrical mounting portion 51 which is integrally bent and formed on the lower side over the entire circumference thereof, and the cylindrical mounting portion 51 is fitted and fixed to the upper end opening of the apparatus body 3. A circumferential groove 52 is formed on the upper surface of the lid receiving portion 50 of the tank body 8 so as to surround the opening 9 of the tank body 8 over the entire circumference. A rubber packing 21 is fitted over the entire circumference so as to project upward from the upper surface of 50.

The sealing lid 10 corresponds to the lid receiving portion 50 in the entire upper and lower directions, and an outer peripheral flange portion that abuts the rubber packing 21 from the upper side over the entire circumference so as to keep the inside of the filtration tank 4 in a sealed state. 53, and is integrally bent downward from the entire circumference of the inner peripheral side of the outer peripheral flange portion 53 into the opening 9 of the tank main body 8 and is detachably fitted into the opening 9 of the tank main body 8. The fitting portion 54 and the outer peripheral portion are integrally formed continuously in an arc shape over the entire circumference of the lower end portion of the fitting portion 54, and the fitting portion 54 side is deepened between the fitting portion 54 and the upper surface recess 55. And a curved lid portion 56 that is gently curved upward so that the central portion becomes high in order to form the upper surface side.

The sealing lid 10 is provided with a release valve 24 for releasing the negative pressure in the filtration tank 4 substantially at the top of the curved lid portion 56. The release valve 24 is composed of a valve hole 57 formed in the top of the curved lid 56 in the vertical direction, and a valve body 58 fitted in the valve hole 57 and operable from the outside. When the sealing lid 10 is removed from the tank body 8 to open the filtration tank 4, the valve 58 is operated from the outside to release the negative pressure state in the filtration tank 4 to equalize the pressure. .

The inverted U-shaped pipe 16 drains the water in the tank body 8 into the bathtub 2 by the siphon effect when the closed lid 10 of the filtration tank 4 is removed, and at the same time, collects the water in the tank body 8. This is to prevent the water from flowing out of the discharge pipe 17. The inverted U-shaped pipe 16 is arranged laterally of the tank body 8 in the apparatus main body 3 so that the bent portion 25 is on the upper side, and the top thereof, that is, the bent portion 25 should be supplied to the inside of the filtration tank 4. It is located above the water level.

Next, the operation of the purifying device 1 will be described. When there is water in the tank body 8 of the filtration tank 4 and the opening 9 of the filtration tank 4 is sealed with the sealing lid 10, when the circulation pump 5 is started, the water in the filtration tank 4 passes through the connecting pipe 14. It is sucked by the circulation pump 5, passes through the circulation pump 5 and the inverted U-shaped pipe 16, and is discharged from the discharge portion 18 at the lower end of the discharge pipe 17 into the water in the bathtub 2.

On the other hand, when the water in the filtration tank 4 is sucked by the circulation pump 5, the filtration tank 4 is in a hermetically sealed state with the outer peripheral flange portion 53 of the sealing lid 10 abutting on the rubber packing 21. Since the inside has a negative pressure, the water in the bathtub 2 is pumped from the suction section 15 through the suction pipe 13 into the filtration tank 4.

The water pumped up into the filtration tank 4 first enters the upper portion of the filtration tank 4, and then passes through the filtration material 7 from the top to the bottom by the suction action of the circulation pump 5. It is returned to the water in the bathtub 2 through the connection pipe 14, the circulation pump 5, the inverted U-shaped pipe 16, the discharge pipe 17, and the discharge portion 18. Then, when the water in the filtration tank 4 passes through the filter material 7 from the top to the bottom, the filter material 7 removes dirt and the like of the water and purifies the water. Therefore, if the circulation pump 5 is operated in this way, the water in the bathtub 2 circulates between the filtration tank 4 and the bathtub 2, and the water in the bathtub 2 is filtered by the filter media 7 in the filtration tank 4. Can be sequentially purified.

Further, the circulation pump 5 is located on the downstream side of the filtration tank 4, and by sucking the water in the filtration tank 4 with this circulation pump 5, the water in the bathtub 2 is pumped up into the filtration tank 4. During the operation of the circulation pump 5, the inside of the filtration tank 4 is always in a negative pressure state. Therefore, the sealing lid 10 can be placed on the tank body 8 and the space between the tank body 8 and the sealing lid 10 can be sufficiently sealed with a rubber packing 21 to provide a sufficient seal. The sealed structure can be very simple.

When cleaning or replacing the filter material 7 in the filtration tank 4, first, the release valve 24 is opened to release the negative pressure state in the filtration tank 4. That is, even if the operation of the circulation pump 5 is stopped, the inside of the filtration tank 4 is in a negative pressure state and the sealing lid 10 is in close contact with the rubber packing 21 on the tank body 8 side. Open the inside of tank 4 to the atmosphere, and release the negative pressure condition in filtration tank 4. Then, the pressure inside and outside of the filtration tank 4 becomes equal, so that the sealing lid 10 is easily removed, and the sealing lid 10 can be easily removed from the tank body 8.

When the release valve 24 is opened or the sealing lid 10 is removed to open to the atmosphere, the water in the tank body 8 of the filtration tank 4 is sucked by the siphon effect of the inverted U-shaped pipe 16, and the connecting pipe 14, It is discharged from the discharge part 18 to the bath 2 through the circulation pump 5, the inverted U-shaped pipe 16 and the discharge pipe 17. Then, after draining the water from the tank body 8, the filter material 7 is taken out and washed or replaced. After washing or replacing the filter material 7, it is sufficient to supply priming water into the tank body 8 of the filtration tank 4, place the sealing lid 10 on the tank body 8, and close the opening 9 with the sealing lid 10. Yes.

4 and 5 illustrate another embodiment of the present invention, which is of a hot water type having a function of retaining or heating hot water circulating between the bath 2 and the bath. In FIG. 4, a partition wall 29 that partitions the inside of the filtration tank 4 into a filtration chamber 27 and an inflow passage 28 on one side thereof is provided in the filtration tank 4. The upper end of the partition wall 29 is lower than the peripheral wall of the tank body 8, and the upper end side of the partition wall 29 serves as an inlet 31 communicating with the filtration chamber 27 from the inflow passage 28. The sealing lid 10 is detachably attached to the opening 9 of the tank body 8 so as to cover the filtration chamber 27 and the inflow passage 28 from above.

A suction pipe 13 is connected to the inflow passage 28 from the lower surface side of the filtration tank 4 so as to communicate with the lower portion of the inflow passage 28, and a heater 30 is provided inside. The heater 30 is for retaining or heating the hot water pumped from the bathtub 2, and is located on the water surface inside the filter tank 4, that is, below the inlet 31 at the upper end of the partition wall 29, of the inflow passage 28. It is arranged vertically inside and is fixed to the bottom side of the filtration tank 4.

A check valve 32 for preventing backflow is provided in the suction portion 15 at the lower end of the suction pipe 13. The discharge part 18 is a spray nozzle type in which bubbles are mixed into the hot water discharged into the bathtub 2 and jetted. An air pipe 33 is connected to the discharge pipe 17 that connects the inverted U-shaped pipe 16 and the discharge portion 18, and air is sent from the air pipe 33 to the discharge portion 18. The air pipe 33 has an electromagnetic valve 34, and by opening / closing the electromagnetic valve 34, jet injection and normal drainage can be switched.

A control box 35 is incorporated in the apparatus main body 3. The control box 35 is for performing on / off switching of the heater 30 and controlling temperature control, as well as for controlling operation / stop of the circulation pump 5 and controlling opening / closing of the solenoid valve 34.

A water temperature sensor 36 detects the hot water temperature in the upper part of the inflow passage 28, compares the output with the set temperature in the control box 35, and the heater 30 is controlled by the control box 35 according to the comparison result. The hot water temperature in the bathtub 2 is adjusted to the set temperature by controlling the energization ratio of. 37 is a water temperature sensor for preventing overheating, and when the temperature of the hot water in the inflow passage 28 rises to 50 ° C or higher, the output from this water temperature sensor 37 causes the control box 35 to stop energizing the heater 30. ing.

Reference numeral 38 is a temperature fuse provided in the circulation pump 5, 39 is a temperature fuse provided in the inflow passage 28, which is provided when the hot water temperature in the bathtub 2 reaches a high temperature without using the heater 30. In order to protect the whole, the temperature fuses 38 and 39 are activated when the hot water temperature in the circulation pump 5 and the inflow passage 28 is 55 ° C or higher, and all the controls are stopped via the control box 35. There is.

Reference numeral 40 is a seismic sensor that operates when the device body 3 is inclined and may fall, and 41 is an earth leakage breaker that operates when leakage occurs in the wiring portion inside the device body 3. Reference numeral 42 is a water flow sensor that detects the discharge amount of the circulation pump 5. The water flow sensor 42 constantly detects the discharge amount of the circulation pump 5, and when the discharge amount of the circulation pump 5 becomes extremely small (normal 2 When the discharge amount of the circulation pump 5 decreases due to the clogging of the filter material 7 etc. (less than 50% of the normal), the operation of the circulation pump 5 is stopped. , A warning sound is emitted to notify the cleaning of the filter material 7.

The operation portion of the control box 35 is configured as shown in FIG. 5 and is provided on the entire surface of the main body 3 of the apparatus. 43 is a main power button for operating / stopping the circulation pump 5, and 44 is a heat retaining button for turning on / off the heater 30. 45 is a UP button for hot water temperature setting, 46 is a DOWN button for hot water temperature setting, 47 is a setting display lamp, and the set hot water temperature can be adjusted appropriately by operating each button 45, 46. Is displayed on the setting display lamp 47. A temperature display lamp 48 is for displaying the hot water temperature detected by the water temperature sensor 36. The display lamps 47 and 48 are turned on by turning on a light emitting diode (LED).

Reference numeral 49a is a jet button, and the solenoid valve 34 is opened and closed by operating the jet button 49a, and when the solenoid valve 34 is opened, a jet jet containing bubbles is jetted from the discharge portion 18. . In the purification device 1 of this embodiment, when the circulation pump 5 is operated, the hot water in the bathtub 2 enters the inflow passage 28 from the suction part 15 through the suction pipe 13, and is filtered from the inflow port 31 at the upper end of the inflow passage 28. It is pumped up into the filtration chamber 27 of the tank 4. Then, the hot water is kept warm or heated by the heater 30 while passing through the inflow passage 28 from the bottom to the top. Also in the case of this embodiment, as in the above-described embodiment, the sealing structure of the filtration tank 4 can be made extremely simple, and the sealing lid 10 can be opened and closed when the filtering material 7 is washed or replaced. Very easy to operate and excellent in operability.

[0034]

[Effect of the invention]

 According to the present invention as set forth in claim 1, the water in the bathtub 2 is pumped up into the filter tank 4 by the circulation pump 5, and the water after being filtered by the filter material 7 in the filter tank 4 is transferred to the bath tank 2. In the circulation purification device for the bath that was returned, the filtration tank 4 was placed in the upper part of the device body 3, and the circulation pump 5 connected to the downstream side of the filtration tank 4 was placed in the lower part of the device body 3, respectively. The tank 4 has a bottomed tank main body 8 into which the filter material 7 is freely inserted and removed from the opening 9 side of the upper end, and the tank 9 is detachably attached to the opening 9 of the tank main body 8 from above. An upper cover 20 that covers the filter tank 4 from the upper side is detachably attached to the upper end of the device body 3, and the upper lid of the tank body 8 is attached to the upper surface of the tank body 8. A circumferential groove 52 that surrounds the opening 9 over the entire circumference is provided, and the packing 21 is provided around the entire circumference of the circumferential groove 52. The sealing lid 10 is attached, and the outer peripheral flange portion 53 that comes into contact with the packing 21 from above and the inner peripheral side of the outer peripheral flange portion 53 and the opening 9 of the tank body 8 are detachably fitted. A fitting portion 54 and a curved lid portion 56 that is curvedly formed on the inner peripheral side of the outer peripheral collar portion 53 so that the central portion is higher is provided, and the negative pressure inside the filtration tank 4 is approximately at the top of the curved lid portion 56. Since the release valve 24 for releasing the state is provided, the following remarkable effects are obtained.

A circulation pump 5 is provided on the downstream side of the filtration tank 4, and the filtration tank 4 has a bottomed tank body 8 into which a filtering material 7 can be freely inserted and removed from an opening 9 side thereof, and the tank body 8 Of the filtration tank 4 is provided with a release valve 24 for releasing the negative pressure state in the filtration tank 4. In addition to simplifying the sealing structure of the tank body 8 and the sealing lid 10, the sealing lid 10 can be easily opened and closed, and the operability and handleability at the time of cleaning or replacement of the filter medium 7 are significantly improved.

A circumferential groove 52 that surrounds the opening 9 of the tank body 8 over the entire circumference is provided on the upper surface side of the upper end portion of the tank body 8, and the packing 21 is fitted around the entire circumference of the circumferential groove 52. Since the packing 21 is stable, the packing 21 can be prevented from falling off. Therefore, as compared with the case where the lid receiving portion 50 and the packing 21 are provided on the inner circumference of the upper end of the opening 9, when the sealing lid 10 is closed while the tank body 8 is filled with water, the tank body is closed. Even if the water in 8 overflows from the opening 9 side of the upper end, the packing 21 does not easily fall off due to the overflowing water, and the filter material 7 in and out of the tank body 8 is taken in and out. Even at this time, the packing 21 does not fall off and enter the inside of the tank main body 8, so that it is easy to handle when attaching and detaching the sealing lid 10, replacing the filter material 7, and the like.

Since the packing 21 is attached to the circumferential groove 52 on the upper surface side, the lid receiving portion 50 is formed on the inner periphery of the upper end of the opening 9 and the packing 21 is fitted to the shoulder portion of the lid receiving portion 50. Compared with the case where the packing 21 is used, the packing 21 can be easily attached, and the structure of the packing 21 itself can be simplified, so that the durability of the packing 21 is improved.

The packing 21 is mounted in the circumferential groove 52 on the upper surface side, and the outer peripheral lid portion 53 is brought into contact with the packing 21 from the upper side, while the inner peripheral side of the outer peripheral lid portion 53 is fitted into the opening 9. Since the joint portion 54 is formed, the fitting precision of the fitting portion 54 with respect to the opening 9 of the tank body 8 is not required so much, and the tank body 8 and the sealing lid 10 can be easily manufactured.

The curved lid portion 56 of the sealing lid 10 is curved and formed so that the central portion is higher on the inner peripheral side of the outer peripheral collar portion 53, and the release valve 24 is provided substantially at the top of the curved lid portion 56. Therefore, the water overflowing from the release valve 24 does not collect near the release valve 24, and the release valve 24 can be prevented from being contaminated by water stains or the like.

According to the present invention as set forth in claim 2, in the device as set forth in claim 1, the release valve 24 has a valve hole 57 formed at the top of the curved lid portion 56 in the vertical direction, and the valve hole 57. Since the valve body 58 fitted to 57 and operable from the outside is provided, the following remarkable effects are obtained. The structure of the release valve 24 is simple.

[Brief description of the drawings]

FIG. 1 is an overall schematic view showing an embodiment of the present invention.

FIG. 2 is a sectional view of an essential part showing an embodiment of the present invention.

FIG. 3 is a sectional view of a mounted state according to an embodiment of the present invention.

FIG. 4 is a schematic view showing another embodiment of the present invention.

FIG. 5 is a front view of an operation unit of a control box according to another embodiment of the present invention.

[Explanation of symbols]

 1 Purification device 2 Bathtub 3 Device body 4 Filtration tank 5 Circulation pump 7 Filtration material 8 Tank body 9 Opening 10 Sealing lid 20 Top cover 21 Packing 24 Release valve 50 Lid receiving part 52 Circumferential groove 53 Outer peripheral collar part 54 Fitting part 56 Curved lid 57 Valve hole 58 Valve body

Claims (2)

[Utility model registration claims] 1. A circulating pump (5) pumps water in a bath (2) into a filtration tank (4), and the water after filtering by a filter material (7) in this filtration tank (4) In the circulation purification device for the bath that was returned to 2), the filtration tank (4)
, The circulation pump (5) connected to the downstream side of the filtration tank (4) at the lower part of the device body (3), and the filtration tank (4) at the upper end. The bottomed tank body (8) into which the filter material (7) is inserted and removed freely from the opening (9) side of the tank, and the opening (9) of this tank body (8) is detachably mounted from the upper side. Equipped with a closed lid (10)
An upper cover (20) that covers the filtration tank (4) from above is detachably attached to the upper end of (3), and the tank main body (8) is attached to the upper surface of the tank main body (8). A circumferential groove (52) surrounding the opening (9) is provided, and a packing (21) is fitted over the entire circumference of the circumferential groove (52), and the sealing lid (10) is packed (21).
The outer peripheral flange portion (53) that abuts against the upper side, and the outer peripheral flange portion (53)
Inside of the opening (9) of the tank body (8) and the fitting part (54) that is detachably fitted in the inside of the tank main body (8) and the inside of the outer circumference flange part (53) so that the central part becomes higher. A curved lid portion (56) that is curvedly formed on the circumferential side, and a filtration tank is provided at approximately the top of the curved lid portion (56).
(4) A circulation purification device for a bath, which is provided with a release valve (24) for releasing the negative pressure state in (4). 2. The release valve (24) is provided with a valve hole (57) vertically formed on the top of the curved lid portion (56) and fitted in the valve hole (57) and operable from the outside. The circulation purifying apparatus for a bath according to claim 1, further comprising a valve body (58).