JPH0819710A - Circulating hot water purification apparatus for bath - Google Patents

Abstract

PURPOSE:To provide a circulating hot water purification apparatus for a bath which can prevent a fire accident due to a heater by leaving hot water always in a passage on the heater side even when hot water in a filtration tank is discharged caused by the stop of a circulating pump or other troubles. CONSTITUTION:A filtration tank 4 is placed above the water level of a bathtub; hot water in the bathtub is pumped up into the filtration chamber 14 of the tank 4 through a suction pipe 7 by a circulating pump 5; the hot water, after being filtered by a filter medium 3 in the tank 4, is returned to the bathtub. A check valve 22 for preventing back flow is attached to the pipe 7, and a heater 18 is installed in a passage 15 between the inflow opening 17 of the chamber 14 and the valve 22 to be located below the inflow opening 17 of the chamber 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circulation for a bath in which hot water in a bathtub is pumped into a filtration tank by a circulation pump, and hot water after being filtered by a filter material in the filtration tank is returned to the bathtub again. The present invention relates to a hot water purification device.

[0002]

2. Description of the Related Art As a circulating hot water purifying apparatus for a bath, conventionally, as described in JP-A-63-28418, hot water in a bath is pumped into a filtration tank by a circulation pump, and filtration in the filtration tank is performed. There is a so-called circulation type in which hot water after being kept warm or heated by a heater is returned to the bath again while being filtered by a material.

In this conventional circulation purification apparatus, a filtration tank filled with a filter material is arranged in the upper portion of the apparatus main body, a circulation pump is arranged in the lower portion, and a suction pipe is connected to the suction side of the circulation pump. The discharge side of the circulation pump is connected to the side surface on the upper side of the filtration tank via a connecting pipe, and is connected to the discharge pipe on the lower side of the filtration tank via a heater.

Then, the circulating pump pumps the hot water in the bathtub through the suction pipe, and the hot water is pressure-fed to the upper side of the filtration tank through the connecting pipe, and the hot water is removed by the filtering material in the filtration tank. After cleaning by heating, it is returned from the discharge pipe to the bath while heating or keeping the temperature with a heater.

[0005]

In the conventional circulating hot water purifying apparatus, since the heater is arranged in the passage between the filtration tank and the discharge pipe, when the operation of the circulation pump is stopped and the filtration tank is opened, All of the hot water in the passage on the heater side will be discharged to the bathtub and the process will end.

Therefore, when the filtration tank is opened, the heater and the circulation pump are turned off before the opening, so that there is no problem even if all the hot water in the passage on the heater side is exhausted.
When the heater is still powered on due to a failure, other causes, or an operation error, the heater generates heat in an empty state, and thus the heater may generate heat and burn.

On the other hand, a circulation pump is provided on the downstream side of the filtration tank, and when the circulation pump is in operation, the inside of the filtration tank is in a negative pressure state, and the circulation pump pumps hot water in the bathtub into the filtration tank through the suction pipe. Is being considered. In this case, the tank body with a bottom and a sealing lid that opens and closes the opening can be configured as a filtration tank, and the sealing structure of the filtration tank is simplified, and its opening and closing is facilitated. There are advantages such as improved operability when cleaning or replacing the filter medium in the filter tank.

In such a filtration tank, it is sufficiently possible to operate the circulation pump without noticing the fact that the sealing lid attached to the opening of the tank body is incomplete and the sealing is incomplete. In that case, even if the sealing lid is poorly sealed, depending on the degree of sealing, the inside of the filtration tank is in a negative pressure state at the beginning of operation of the circulation pump, and hot water in the bathtub can be pumped into the filtration tank. After a long time, the airtightness of the filtration tank further decreases and pumping becomes impossible, and all the hot water in the passage on the heater side may drain and end, causing the problem of burnout as described above. .

Therefore, in such a case, safety measures such as detecting the water amount of the circulation pump with a water amount sensor and stopping all the functions when the water amount falls below a certain level are considered. However, considering that this type of circulating hot water purification device is installed in a bathroom with high humidity, in order to ensure the safety and reliability of the entire device, the amount of water in the circulation pump should be adjusted with a water amount sensor, etc. Just detecting and stopping the function is not always perfect, and other double and triple safety measures are necessary.

In view of the above conventional problems, the present invention ensures that hot water always remains in the passage on the heater side even if the hot water in the filtration tank is drained due to the stop of the circulation pump or other causes, and the burnout by the heater is caused. An object of the present invention is to provide a circulating hot water purifying device for a bath that can prevent accidents.

[0011]

According to the present invention, the filtration tank 4 is arranged above the surface of the bath in the bath B and the hot water in the bath B is filtered by the circulation pump 5 through the suction pipe 7. In a circulating hot water purifying device for a bath, which is pumped into the filtration chamber 14, filtered with hot water by the filter medium 3 in the filtration tank 4 and returned to the bath B, a check valve for preventing backflow in the suction pipe 7.
22 is provided, and the heater 18 is provided below the inflow port 17 of the filtration chamber 14 and in the passage 15 between the inflow port 17 and the check valve 22.

[0012]

[Operation] A check valve 22 for preventing backflow is provided on the suction pipe 7, and a heater 18 is provided below the inflow port 17 of the filtration chamber 14 and in the passage 15 between the inflow port 17 and the check valve 22. Therefore, for example, when the circulation pump 5 is stopped
Even if the hot water of 4 is drained, the hot water remains in the passage 15 up to the height of the inlet 17 at the upper end of the partition wall 16, and the hot water on the heater 18 side is not completely exhausted.

Therefore, even if the circulation pump 5 is stopped and the sealing lid 13 is removed without turning off the power of the heater 18, the member forming the passage 15 will generate heat from the heater 18. There is no risk of burning accidents such as burning.

[0014]

Embodiments of the present invention will now be described in detail with reference to the drawings. The drawings illustrate one embodiment of the present invention, FIG. 1 is a schematic view showing the configuration of a circulation purification device, FIG. 2 is a cross-sectional view showing the structure of the main part of the circulation purification device, and FIG. 3 is a circulation purification device in a bathroom. FIG. 4 is a cross-sectional view showing a state of use when attached to the bathtub of FIG. 4, and FIG. 4 is a front view of an operation portion of the control box.

As shown in FIG. 1, the circulation purification device 1 comprises a device main body 2, a filtration tank 4 which is disposed in the upper part of the device main body 2 and is filled with a filter medium 3, and a filtration inside the device main body 2. The circulation pump 5 located below the tank 4, the suction pipe 7 in which the lower end suction part 6 is immersed in the hot water W in the bath B, and the lower end discharge part 8 is immersed in the hot water W in the bath B. And a discharge pipe 9 provided.

As shown in FIG. 3, the main body 2 of the apparatus is
The suction part 6 and the discharge part 8 are mounted on the corners of the bath B so that they are immersed in the hot water W of the bath B. The filtration tank 4 includes a filter 10 for removing hair and the like,
A granular filter material 3 for removing and purifying dirt from the hot water drawn from the bath B is filled up and down, and a bottomed tank body 11 in which the filter 10 and the filter material 3 are freely inserted and removed 11 And the opening 12 on the tank body 11.
And a sealing lid 13 which is detachably mounted so as to open and close.

As the filter material 3, a fired product such as granular ceramic is generally used. Also filter material
3 is put in a special container and the tank body 11 of the filtration tank 4 is
It is preferable that it can be easily put in and taken out.

Inside the tank body 11 of the filtration tank 4, the inside of the tank body 11 is provided with a filtration chamber 14 and an inflow passage on one side thereof.
A partition wall 16 is provided to divide into 15 and. Partition wall
The upper end of 16 is lower than the peripheral wall of the tank body 11,
The upper end side of the partition wall 16 serves as an inflow port 17 that communicates with the filtration chamber 14 from the inflow passage 15.

A suction pipe 7 is inserted into the inflow passage 15 from the lower surface side of the filtration tank 4 so as to communicate with the lower end of the inflow passage 15.
Are connected and a heater 18 is provided inside. The heater 18 is for keeping or heating the hot water pumped up from the bath B. The heater 18 has an inlet 14 to the filtration chamber 14 side of the filtration tank 4, that is, a lower side than the upper end of the partition wall 16 of the inflow passage 15. It is arranged vertically inside and is fixed to the bottom side of the filtration tank 4.

The circulation pump 5 is a suction pipe for the hot water W in the bathtub B.
It is for pumping up into the filtration tank 4 via the suction unit 6 of 7, and is arranged below the filtration tank 4 inside the apparatus main body 2. Connect the suction side of the circulation pump 5 to the connecting pipe.
It is connected to the bottom of the tank body 11 via 19 and, on the discharge side, the hot water after being purified by the filtering material 3 of the filtering tank 4 is in the bath B.
It is connected to the discharge pipe 9 through an inverted U-shaped pipe 20 which is bent and formed in an inverted U-shape so as to be returned inward.

A reciprocating pump, a spiral pump, etc. are used as the circulation pump 5, and any structure may be used. The inverted U-shaped pipe 20 discharges the hot water in the tank body 11 into the bathtub B by the siphon effect when the sealing lid 13 of the filtration tank 4 is removed, and at the same time, when the priming water is supplied to the tank body 11, Is for preventing the gas from flowing out of the discharge pipe 9. The inverted U-shaped tube 20 is arranged laterally of the tank body 11 in the apparatus body 2 so that the bent portion 21 is on the upper side, and the top portion, that is, the bent portion 21 is the filtration tank.
It is located above the water level of the water to be supplied within 4.

The suction part 6 is provided with a check valve 22,
The check valve 22 allows the hot water on the heater 18 side in the inflow passage 15 to flow backward when the operation of the circulation pump 5 is stopped, etc.
It is for preventing backflow so as not to flow out.

The discharge part 8 is of a so-called jet nozzle type in which bubbles are mixed in the purified hot water and jetted into the hot water W in the bath B. An air pipe 23 having one end open to the atmosphere is connected to a discharge pipe 9 that connects the inverted U-shaped pipe 20 and the discharge unit 8, and air is sent from the air pipe 23 to the discharge unit 8. The air pipe 23 has a solenoid valve 24, and by opening and closing the solenoid valve 24, jet injection and normal drainage can be switched.

The discharge section 8 itself may be a simple opening in which the lower end of the discharge pipe 9 is formed in an open shape. In that case, the air pipe 23 and the solenoid valve 24 are unnecessary. The device body 2 is
As shown in FIG. 2, it has a case shape with an open upper end, and an edge portion 25 on the upper end side of the tank body 11 is attached to the opening side. Then, an upper cover 30 is provided on the outer periphery of the upper part of the device body 2.
Is detachably fitted.

As shown in FIG. 2, a rubber packing 26 is mounted in the circumferential direction on the upper surface of the edge portion 25 of the tank body 11. The sealing lid 13 is detachably attached to the opening 12 of the tank body 11 so as to cover the filtration chamber 14 and the inflow passage 15 from the upper side. The sealing lid 13 has a fitting portion 27 that fits into the opening 12 of the tank body 11, and a flange portion 28 formed on the outside of the fitting portion 27. When fitted into the opening 12 of the tank 11, the flange 28 is
The rubber packing 26 on the edge portion 25 is abutted from above to keep the inside of the filtration tank 4 in a sealed state.

The sealing lid 13 is provided with a release valve 29 for releasing the negative pressure. The release valve 29 is used when the sealing lid 13 is removed from the tank body 11 and the filtration tank 4 is opened.
It is for releasing the negative pressure state inside and equalizing pressure. The release valve 29 is provided on the sealing lid 13 and also on the tank body.
It may be provided on the 11 side.

In FIG. 1, reference numeral 31 is a control box, which is incorporated in the apparatus main body 2. The control box 31 is for performing on / off switching of the heater 18 and control of temperature adjustment, as well as operation / stop control of the circulation pump 5 and opening / closing control of the solenoid valve 24.

A water temperature sensor 32 detects the hot water temperature in the upper portion of the inflow passage 15, compares the output with the set temperature in the control box 31, and according to the comparison result, the heater 18 is operated by the control box 31. The hot water temperature in bathtub B is adjusted to the set temperature by controlling the energization ratio of.

Reference numeral 33 denotes a water temperature sensor for preventing overheating, which is provided when the temperature of the hot water in the inflow passage 15 rises to 50 ° C. or higher.
An output from the water temperature sensor 33 causes the control box 31 to stop energizing the heater 18.

Reference numeral 34 is a thermal fuse provided in the circulation pump 5, 35 is a thermal fuse provided in the inflow passage 15, and is a bathtub.
In order to protect the entire equipment when the temperature of the hot water in B reaches a high temperature without depending on the heater 18, the circulation pump 5 and the inflow passage
When the temperature of the hot water in 15 is 55 ° C. or higher, the thermal fuses 34 and 35 are activated to stop all control via the control box 31.

Reference numeral 36 is a seismic sensor that operates when the device body 2 is inclined and may fall, and 37 is an earth leakage breaker that operates when an electric leakage occurs in a wiring portion inside the device body 2. 38 is a water flow sensor for detecting the discharge amount of the circulation pump 5. When the discharge amount of the circulation pump 5 is constantly detected by this water flow sensor 38 and the discharge amount of the circulation pump 5 becomes extremely small (normally 20%). In the following, the operation of the circulation pump 5 is stopped to prevent idle operation, and when the discharge amount of the circulation pump 5 decreases due to clogging of the filter medium 3 (normal 5
A warning sound is emitted to notify the cleaning of the filter medium 3 in the following.

The operation section 39 of the control box 31 is constructed as shown in FIG. 4 and is provided on the front surface of the apparatus main body 2. 40 is a main power button for operating / stopping the circulation pump 5, and 41 is a warming button for turning on / off the heater 18. 42 is an UP button for water temperature setting, 43 is a DOWN button for water temperature setting, 44 is a setting display lamp, and each button 42, 4
By operating 3, the set hot water temperature can be adjusted appropriately, and the set temperature is displayed on the setting display lamp 44.
A temperature display lamp 45 is for displaying the hot water temperature detected by the water temperature sensor 32. In addition, each indicator lamp 44,4
The light emitting diode (LED) 5 lights up.

Reference numeral 46 denotes a jet button, and when the jet button 46 is operated, the electromagnetic valve 24 is opened and closed, and when the electromagnetic valve 24 is opened, a jet jet containing bubbles is ejected from the ejection portion 8.

Next, the operation of the circulation purification device 1 will be described. When there is water up to a predetermined water level in the tank body 11 of the filtration tank 4 and the opening 12 is sealed with the sealing lid 13, the circulation pump 5 is started through the main power button 40. Water is sucked by the circulation pump 5 via the connection pipe 19, and is discharged from the discharge portion 8 at the lower end portion of the discharge pipe 9 into the hot water W in the bath B through the circulation pump 5 and the inverted U-shaped pipe 20. go.

On the other hand, when the water in the filtration tank 4 is drained, the filtration tank 4 is in a hermetically sealed state with the flange portion 28 of the sealing lid 13 abutting on the rubber packing 26, and the inside of the filtration tank 4 becomes negative pressure. Therefore, the hot water W in the bathtub B is pumped from the suction part 6 through the suction pipe 7, the inflow passage 15, and the inflow port 17 into the filtration chamber 14 of the filtration tank 4.

At this time, the hot water drawn up by the circulation pump 5 first passes through the heater 18 when passing through the inflow passage 15.
Is kept or heated to a predetermined temperature. Then, hot water in a heat-retaining or heating state flows into the upper side of the filter chamber 14 from the inlet 17 at the upper end of the partition wall 16 with the suction action of the circulation pump 5, and then the filter 10 in the filter chamber 14 is filtered. While passing through the material 3 from top to bottom, the filter 10 removes hair and the like in the hot water, and the filter material 3 removes and purifies the dirt of the hot water. The hot water purified by passing through the filter medium 3 is connected pipe 19, circulation pump 5, inverted U-shaped pipe 20,
It is returned to the hot water W in the bathtub B through the discharge pipe 9 and the discharge part 8.

Therefore, when the circulation pump 5 is in the operating state in this way, the hot water W in the bath B is filtered by the filtration tank 4 and the bath.
The hot water in the bath B can be successively purified by the filter medium 3 in the filtration tank 4 while circulating between the hot water and the hot water at a predetermined temperature by the heater 18 in the inflow passage 15.

The circulation pump 5 is located on the downstream side of the filtration tank 4, and the circulation pump 5 sucks the hot water in the filtration tank 4 to pump the hot water W in the bath B into the filtration tank 4. During operation of the circulation pump 5, the inside of the filtration tank 4 is always in a negative pressure state. Therefore, the sealing lid 13 can be placed on the tank body 11, and the space between the tank body 11 and the sealing lid 13 can be sufficiently sealed with a simple structure such that the rubber packing 26 seals between them. The sealed structure can be very simple.

When the filter medium 3 in the filtration tank 4 is to be washed or replaced, the release valve 29 is first 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 13
Is in close contact with the rubber packing 26 on the tank body 11 side, the negative pressure state in the filtration tank 4 is released by opening the release valve 29 to open the filtration tank 4 to the atmosphere. Then, the sealing lid 13 is easily removed and can be easily removed from the tank body 11.

When the release valve 29 is opened or the sealing lid 13 is removed to open to the atmosphere, the hot water in the tank body 11 of the filtration tank 4 is sucked by the siphon effect of the inverted U-shaped tube 20,
It is discharged from the discharge part 8 to the bath B through the connection pipe 19, the circulation pump 5, the inverted U-shaped pipe 20, and the discharge pipe 9. Tank body 11
After removing the hot water from the inside, take out the filter medium 3 and wash or replace it.

After washing or replacing the filter medium 3, the filter tank
Fill the tank body 11 of 4 with priming water, and
The opening may be closed with the sealing lid 13. Therefore, the filtration tank
It is very easy to attach and detach the sealing lid 13 of 4, and
Since the operability at the time of cleaning or replacement of the filter is very good, it is possible to clean or replace the filter medium 3 in the filter tank 4 at a proper time.

Since the check valve 22 is provided in the suction portion 6 at the lower end of the suction pipe 7, even when all the hot water in the filter chamber 14 of the tank body 11 is drained when the filter medium 3 is washed or replaced, the inflow passage
Hot water is accumulated in 15 up to the height of the inflow port 17 at the upper end of the partition wall 16, and the hot water on the heater 18 side is not completely exhausted.

Therefore, even if the circulating pump 5 is stopped and the sealing lid 13 is removed without turning off the heater 18, the member on the tank body 11 side forming the inflow passage 15 is formed. There is no risk of a burnout accident such as burning due to the heat generated by the heater 18.

Even if the hot water in the filtration chamber 14 of the tank body 11 is drained due to the poor sealing of the airtight lid 13, the hot water is still accumulated in the inflow passage 15. There is no risk of a burnout accident due to 18. Therefore, it is of course possible to prevent burnout accidents due to operation mistakes and the like, and when considering that the bathroom in which this type of circulating hot water purification device is installed is in a high-humidity atmosphere, it can be used alone or By using it together with other safety devices, safety and reliability are significantly improved, and perfect safety can be ensured.

[0045]

According to the present invention, the filtration tank 4 is arranged above the surface of the bath in the bath B, and the circulation pump 5 is used to remove the water in the bath B from the filtration chamber of the filtration tank 4 through the suction pipe 7. In a circulating hot water purifier for a bath in which hot water was pumped into the filter tank 14 and filtered with the filter medium 3 in the filter tank 4 to return to the bath B, a check valve 22 for preventing backflow was provided in the suction pipe 7. Since the heater 18 is provided below the inflow port 17 of the filtration chamber 14 and in the passage 15 between the inflow port 17 and the check valve 22, the circulation tank 5 is stopped, and other reasons cause the filtration tank. Even if the hot water of 4 disappears, the hot water always remains in the passage 15 on the side of the heater 18, so that the burnout accident by the heater 18 can be prevented. Therefore, as a safety device for this kind of circulating hot water purifying device installed in a bathroom, its practical benefit is extremely large.

[Brief description of drawings]

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

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

FIG. 3 is a cross-sectional view of a mounting state showing an embodiment of the device of the present invention.

FIG. 4 is a front view of an operation unit of a control box showing an embodiment of the device of the present invention.

[Explanation of symbols]

 1 Circulation purification device 2 Device body 3 Filtration material 4 Filtration tank 5 Circulation pump 7 Suction pipe 9 Discharge pipe 11 Tank body 13 Sealing lid 14 Filtration chamber 15 Inflow passage 16 Partition wall 17 Inlet 18 Heater 20 Reverse U-shaped pipe 22 Non-return Valve B bathtub

Claims (1)

[Claims] 1. A filtration tank (4) is arranged above the surface of the hot water in the bath (B), and the hot water in the bath (B) is filtered through a suction pipe (7) by a circulation pump (5). In a circulating hot water purifier for a bath, the hot water is pumped into the filtration chamber (14) of (4), and hot water is filtered by the filtration material (3) in the filtration tank (4) and returned to the bath (B). Check the check valve (2
2), a heater is provided below the inflow port (17) of the filtration chamber (14) and in the passage (15) between the inflow port (17) and the check valve (22).
A circulating hot water purifier for a bath, which is provided with (18).