JPH11128099A - Pipeline sterilizing and purifying device in bath water circulating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To clean a whole pipeline by means of hot water by cleaning a circulation pipeline by means of hot water, discharging hot water which is sterilized and purified in the circulation pipeline from the sucking place and the flow-out place of the circulation pipeline at the time of discharge after sterilizing and purifying and washing the places by means of hot water. SOLUTION: A pipeline sterilizing and purifying device consists of a heater 1, a circulation pump P, the circulation pipeline 5 where bath water is returned from a bathtub 10 to the bathtub 10 by the circulation pump P, a connection pipeline connecting the proper position near the sucking side of the circulation pipeline 5 to the proper position near the flow-out side of the circulation pipeline 5 and a sub- connection pipeline disposed between the proper position near a center side from the connecting place of the connection pipeline 6 at the flow-out side of the circulation pipeline 5 and the proper position near the sucking side from the connecting place of the connection pipeline 6 at the sucking side of the circulation pipeline 5. Bath water in the circulation pipeline is circulated with the connection pipeline 6 and the sub-connection pipeline 7 while increasing temp. in the bath water inside the circulation pipeline by the heater 1 and hot water sterilized and purified inside the circulation pipeline 5 is discharged from the sucking place of the circulation pipeline 5 or the flow-out place.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of cleaning a circulation pipe with hot water, and disinfecting and purifying hot water sterilized and purified in the circulation pipe at the time of discharge after sterilization and purification. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe line sterilizing and purifying apparatus in a bath water circulation apparatus that drains water from a location and cleans the location with hot water so that the entire pipeline can be cleaned with hot water.

[0002]

2. Description of the Related Art In a conventional bath water circulating apparatus, a microbial membrane may adhere to the apparatus body and piping due to long-term use.
Due to health and safety issues, it was necessary to sterilize and clean the device at regular intervals. In addition, the method involves directly adding a disinfectant to hot water in the bathtub instead of piping outside the bathtub and circulating the bathwater circulating device for sterilization and washing.

[0003]

As described above, a large amount of chemicals must be used in order to add a disinfectant to hot water in a bathtub, which is uneconomical. Under such circumstances, the applicant has developed an apparatus for sterilizing and cleaning only the inside of the circulation pipeline with hot water. However, the circulation line in the bath water circulation device except for the suction point and the outflow point of the circulation line can be cleaned with hot water by sterilization with hot water, and there is no device that can clean the entire circulation line with hot water. That is, it was not possible to wash the entire circulation line with hot water even at the suction point and the outflow point of the circulation line. Further, a part of the circulation pipeline is subjected to hot water washing after a predetermined time in a batch process. For this reason, there has been a demand so far to periodically perform hot water disinfection and cleaning of the entire circulation pipeline.

[0004]

SUMMARY OF THE INVENTION The inventors of the present invention have made intensive studies to solve the above-mentioned problems, and as a result, have found that the present invention relates to a heater capable of heating bath water from a low temperature to a high temperature. A circulating pump for circulating bath water, a circulating pipe in which the tubing returns the bath water from the bathtub to the bathtub, an appropriate position near the suction side of the circulating pipe, and the circulating pipe. A connecting line connecting an appropriate position closer to the outflow side, and an appropriate position closer to the center side than a connecting point of the connecting line on the outflow side of the circulation line and a suction side of the circulation line. A sub-connection pipe provided between the connection point of the connection pipe and an appropriate position closer to the suction side than the connection pipe, and when washing the pipe, the connection pipe is heated while the temperature of the bath water in the circulation pipe is increased by a heater. It can be circulated through the channel and the sub-connection line, and at the time of drainage,
By having a pipe line sterilizing and purifying device in a bath water circulating apparatus that enables hot water sterilized and purified in the circulation pipe to be drained from a suction point and an outflow point of the circulation pipe,
The circulation pipe is cleaned with hot water by hot water sterilization, and the hot water sterilized and purified in the circulation pipe at the time of discharge after the sterilization and purification is drained from the suction point and the outflow point of the circulation pipe, and the hot water is cleaned. The present invention solves the above-mentioned problem by performing sterilization and cleaning, thereby enabling the entire pipeline to be sterilized with hot water.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First, a first embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 5 and 8, a bath water circulation device mainly heats bath water from a low temperature to a high temperature. Heater 1 such as a ceramic heater, a filter 2 for filtering fine dirt and impurities from the bath water, an ultraviolet sterilizer 3 for sterilizing the bath water, a circulation pump P for circulating the bath water, and the circulation Bath water is tub 10 by pump P
And a circulation pipeline 5 that circulates back to the bathtub 10.

The type of the filter 2 is a precision filter or a normal filter. The filter 2 is a filter filled with activated stone or activated carbon and used as a filter material for an adsorbent, or made of a woven or non-woven fabric. Some make up. In any case, fine dust and dirt are removed with impurities.

The connecting line 6 connects an appropriate portion of the circulation line 5 near the suction side and an appropriate portion of the circulation line 5 near the outflow side. Road 5
b is connected to an appropriate part, and a closed loop is formed by the circulating pipe 5 in which the circulating pump P, the heater 1, the filter 2, and the ultraviolet sterilizer 3 are arranged, and the connecting pipe 6. In addition, the order of the heater 1, the filter 2, and the ultraviolet sterilizer 3 is not limited to the order of the circulation pump P, and an appropriate one is provided. Further, in the circulation pipeline 5, the suction side is referred to as a pumping-side pipeline 5a, and the outflow side is referred to as an outflow-side pipeline 5b, with respect to a connection point with both ends of the connection pipeline 6. The circulating pump P, the heater 1, the filter 2, and the ultraviolet sterilizer 3 are not provided on the pumping-side pipe 5a and the outflow-side pipe 5b. A pre-filter 8 is provided at a suction port of the pumping-side pipe 5a, and an ejection section 9 is provided at an outlet of the outflow-side pipe 5b so that a jet jet flows out. Further, it is preferable that the connection conduit 6 be provided as close to the pre-filter 8 and the ejection part 9 as possible.

[0008] The sub-connection line 7 is located at an appropriate position closer to the center than the connection point of the connection line 6 on the outflow side of the circulation line 5 and the connection line on the suction side of the circulation line 5. It is provided between an appropriate position closer to the suction side than the connection point of the passage 6. The three-way valve V is provided at a base of the connection pipe line 6 near the outflow side. That is, it is provided at the joint between the circulation line 5 and the connection line 6. Also, the first on-off valve V1
Is provided at an appropriate position on the suction side of the circulation pipe 5 between the connection point of the connection pipe 6 and the connection point of the sub-connection pipe 7. Further, the second on-off valve V2 is provided at an appropriate position in the sub-connection pipe line 7. Specifically, the second
The on-off valve V <b> 2 is provided on the sub-connection line 7 near the outflow side of the circulation line 5. Further, the sub-connection pipe 7 is
Since the hot water may stagnate, it is preferable to shorten the length as much as possible.

When the hot water pipeline is washed, the three-way valve V is switched so as to flow from the port to the port, and the first on-off valve V1 and the second on-off valve V2 are each opened. As a result, as shown in FIG. 6, in the circulation line 5, the bath water is heated to a high temperature by the heater 1, and the circulation pump P, the heater 1, the filter 2, and the ultraviolet sterilizer 3
A second closed loop is formed by a closed loop of the circulation line 5 and the connection line 6 in which is disposed, and a sub-connection line 7 provided in parallel to the closed loop, the pumping-side line 5a, and a part of the closed loop. With this configuration, the bath water in the inside circulates by the operation of the circulation pump P. Then, after the hot water is heated to a predetermined temperature, the hot water pipeline is cleaned for a predetermined time. In the subsequent hot water discharge mode, the three-way valve V is switched to flow from the port to the port, the first on-off valve V1 is closed, and the second on-off valve V2 is kept open. As a result, as shown in FIG. 7, the outflow-side pipe 5b and the connecting pipe 6 circulate in the reverse direction, so that hot water flows out of the water-pumping-side pipe 5a into the bathtub 10 and the pumping-side pipe 5a. The inside of the passage 5a and eight places of the prefilter are sterilized and washed with hot water. This ends in a predetermined time, and this time, the valve is controlled so as to be similar to the normal circulation. That is,
As shown in FIG. 8, the three-way valve V is switched so as to flow from port to port, the first on-off valve V1 is opened, and the second on-off valve V2 is closed. As a result, the hot water still remaining in the closed loop returns to the inside of the bathtub 10 while sterilizing and cleaning the outflow-side conduit 5b and the nine ejection portions. Through such hot water circulation, all parts of the circulation pipeline 5 can be sterilized and cleaned. That is, all-water sterilization cleaning can be performed.

In the present invention, all operations including valve control are performed automatically. This configuration is configured as a block diagram as shown in FIG. That is, the central processing unit 2
1 (CPU) for controlling the start and end of the hot water pipe line sterilization and cleaning, and the control of the three-way valve V, the first on-off valve V1 and the second on-off valve V2. Valve control means 23, the first temperature sensor 25 and the second
A temperature sensor switching means 24 for switching control of the temperature sensor 26, a lamp control means 27, and a heater control means 28 are provided. The hot water disinfection cleaning command means 22, a time setting unit that sets a cleaning start time for performing hot water cleaning in the circulation pipeline, a time storage unit that stores the set cleaning start time and the cleaning time, It has a cleaning start time and a time changing unit for appropriately changing the cleaning time. The central processing unit 21, hot water sterilization and cleaning command means 22, valve control means 23, temperature sensor switching means 24, lamp control means 2
7. The heater control means 28 and the like are collectively referred to as a control unit A.

The first temperature sensor 25 detects a desired hot water temperature (for example, 42.degree. C.) as bath water, and the second temperature sensor 26 detects a desired hot water temperature at 65.degree. This is to detect whether or not the above is true. The two temperature sensors are switched by the temperature sensor switching means 24 in the normal operation mode and the hot water sterilization and washing mode. The lamp control means 27 controls ON / OFF of the UV lamp 3a. further,
ON / OFF of the heater 1 is controlled by the heater control means 28.

FIGS. 2 and 3 show that the present invention relates to a method for controlling the temperature of hot water in a circulation line, a three-way valve V, a first on-off valve V1, and a second on-off valve V.
2 is a flowchart of control of a switching command of a valve such as No. 2, and after a predetermined set time from the state of the flowchart of FIG.
The temperature is switched by the temperature sensor switching means 24 (see S12), and the second temperature sensor (hot water type) 26 is turned on (see S13). At this time, the heater 1 is kept in the ON state. Then, the UV lamp 3a of the ultraviolet sterilizer 3 is turned off (see S14). And valve control means 2
At 3, the three-way valve V is switched so as to flow from port to port and change to circulation in the pipeline (see S15).
Further, the second on-off valve V2 is opened (see S16), and the first on-off valve V1 keeps the open state. Then, from the time when the above-mentioned hot water disinfection cleaning mode is performed, the hot water disinfection cleaning instruction means 22 operates, and the bath water temperature is determined based on a predetermined time in consideration of the temperature rise until the start of the hot water pipeline disinfection cleaning. It is measured (see S17), and the temperature in the circulation line 5 is set to a predetermined temperature (for example, 70 ° C.) via the second temperature sensor 26.
Is automatically detected (see S18), and if the temperature does not exceed the predetermined temperature, the ON state of the heater 1 is maintained.

[0013] The bath water in the pipeline has a predetermined temperature (for example, 7 ° C).
0 ° C.), the heater 1 is turned off (S
19). In this state, the bath water in the closed loop pipe is circulated by the pump pressure of the circulating pump P, and the hot water pipeline sterilization washing operation is started, and this state is as shown in FIG.
At this time, there is no valve near the pre-filter 8 of the pumping-side pipe 5a, but the heads of the 6 connecting pipes and the 7 connecting pipes of the three-way valve V are higher than the 10 bathtubs. Since the hot water in the hot water pipe does not flow out to the outside, there is no inflow of bath water from the water pumping pipe 5a or the pre-filter 8.
Then, from the start of the hot water pipeline sterilization cleaning operation, the hot water sterilization cleaning command means 22 operates to measure a predetermined time (about 5 minutes at 70 ° C.) for hot water pipeline cleaning (see S20),
It is determined whether or not the predetermined time has elapsed (see S21).
If the predetermined time has not elapsed, the process returns to the step before S18, and if the predetermined time has elapsed, the hot water pipe line sterilization and washing operation is completed, and the suction / discharge unit hot water sterilization mode is set (see S22). .

First, a hot water sterilization mode for the water pumping section is set (S2).
3). Then, the three-way valve V is switched by the valve control means 23 so as to flow from the port to the port and change in the direction of the water pumping section (see S24), and the first on-off valve V1 is closed (see S25). At this time, the second on-off valve V2 keeps the open state. As a result, the outlet pipe 5b and the connecting pipe 6 circulate in the reverse direction, so that hot water flows out of the pump pipe 5a into the bathtub 10, and the hot water flows in the pump pipe 5a and the pre-filter 8 places. Is sterilized and washed with hot water. For the hot water sterilization of the water pumping section, a predetermined time for hot water sterilization of the water pumping section is measured by the hot water sterilization and washing instruction means 22 (see S26).
It is determined whether or not the predetermined time has elapsed (see S27).

Thereafter, the processing shifts to the start of the flowchart of FIG. If the predetermined time has not elapsed, the process returns to the step before S26, and if the predetermined time has elapsed, the discharge section hot water sterilization mode is set (S26).
28). Then, the three-way valve V is switched by the valve control means 23 so as to flow from the port to the port and change to the discharge section side (see S29), and the first on-off valve V1 is opened (see S30), and the second on-off valve V2 is opened (see S30). The on-off valve V2 is closed (see S31). As a result, the circulation line 5 becomes forward circulating, so that the bath water is sucked from the pre-filter 8 side, and the hot water flows out of the ejection part 9 into the bathtub 10 from the outflow side line 5b side, and the outflow side line 5b Hot water sterilization and cleaning is performed on the inside and 9 locations of the ejection part with hot water. Regarding this discharge part hot water sterilization cleaning, the predetermined time of the discharge part hot water sterilization is measured by the hot water sterilization cleaning instruction means 22 (see S32), and it is determined whether or not this predetermined time has elapsed (see S33). If the predetermined time has not elapsed, the process returns to the step before S32, and if the predetermined time has elapsed, the discharge portion hot water sterilization mode ends,
Next, it is determined whether or not to end this all-water hot water sterilization cleaning (see S34). When it is completed, the temperature sensor is switched by the temperature sensor switching means 24 (S34).
35), the first temperature sensor (normal type) 25 is O
N (see S36). Then, the heater 1 is turned on (see S37). The UV lamp 3a is turned on (S38).
), And returns to the flowchart of the normal operation state from this state. In this way, the above-described hot water disinfection and cleaning mode of the drainage section has the same relationship as the normal circulation operation mode, and can shift to the normal operation mode without performing valve control after a certain time has elapsed. In addition, if it is determined in step S34 that the above-described all-water hot water sterilization cleaning is not to be ended, the process returns from FIG.

As shown in FIG. 4, the flow chart of the normal operation state of the bath water circulating device determines whether or not to drive the bath water circulating device (see S1). The power of the bath water circulation device is turned on (see S2), the circulation pump P is driven (see S3), and the heater 1 is turned on.
Is turned ON (see S4), and the U
The V lamp 3a is turned on (see S5), the first temperature sensor (normal type) 25 is turned on, and the bath water circulation device is driven. At that time, it is determined whether or not to perform hot water pipeline cleaning (see S7).
The flow proceeds to the flow chart of FIG. 4, and the flow chart of the automatic subroutine (see FIG. 2) and the flow chart (see FIG. 3) returns to the flow chart of FIG. If it is determined that the hot water pipeline sterilization cleaning is not to be performed, it is driven as it is, and it is determined whether or not to stop the bath water circulation device (see S7). Power on
The process returns to step S2. When the bath water circulation device is not driven in S1, the process is terminated.

As shown in FIGS. 9A and 9B,
FIG. 9A shows a basic configuration, in which the circulation pipeline 5 is drawn by a thick line, and the connection pipeline 6 and the sub-connection pipeline 7 are drawn by relatively thin lines. This is the operation mode, and FIG. 9 (B) shows the hot water pipeline sterilization cleaning mode. Other reference numerals and the like are the same as those of the first embodiment (FIGS. 5 to 8), and a description thereof will be omitted.

As shown in FIG. 10, the three-way valve V
Instead, two on-off valves are provided at two locations in the circulation pipeline 5 and one location in the connection pipeline 6 near the base of the connection pipeline 6 near the outflow side. An on-off valve V ₁ , an on-off valve V ₂ , and an on-off valve V _{3 are} located before and after the three-way valve V.
Are provided respectively. In FIG. 10 (A), the are those that form the same effect as in FIG. 5 or FIG. 8, to open the on-off valve V ₁ and closing valve V _2, and a and which closes the on-off valve V _3, in FIG. 5 This is a case where the outflow-side pipe line 5b and the nine ejection portions are sterilized and washed with hot water in the same manner as in the normal circulation or in FIG. Further, in FIG. 10 (B), the are those that form the same effect as FIG. 6, i.e., on-off valve V ₁ and closing valve V ₃
Opening the and is obtained by closing the on-off valve V _2, a case of circulating closed loop hot water. Further, in FIG. 10 (C), the are those that form the same effect as FIG. 7, i.e., closes the on-off valve V _1, is obtained by opening the on-off valve V ₂ and the on-off valves V _3, reverse loop heat By circulating the water, the inside of the pumping-side pipe line 5a and the eight pre-filters are sterilized and washed with hot water. By appropriately opening and closing the above three on-off valves V ₁ , V ₂ , V ₃ , the same operation as that of the three-way valve V is performed.

[0019]

First, according to the first aspect of the present invention, a heater 1 capable of heating bath water from a low temperature to a high temperature, a circulation pump P for circulating the bath water, and A circulating pipe 5 that returns from the bathtub 10 to the bathtub 10, and a connecting pipe that connects an appropriate position near the suction side of the circulating pipe 5 and an appropriate position near the outlet side of the circulating pipe 5. 6
And an appropriate position closer to the center side than the connection point of the connection line 6 on the outflow side of the circulation line 5 and the suction side of the connection side of the connection line 6 on the suction side of the circulation line 5 And a sub-connection pipe 7 provided between the sub-connection pipe 7 and an appropriate position closer thereto. During the sterilization and cleaning of the pipe, the connection pipe 6 and the sub-connection pipe are heated while the temperature of the bath water in the circulation pipe is increased by the heater 1. 7. A pipe line sterilizing and purifying apparatus in a bath water circulating apparatus that enables hot water sterilized and purified in the circulating pipe 5 to be drained from a suction point or an outflow point of the circulating pipe 5 at the time of drainage. First, since the entire circulation pipeline 5 is entirely sterilized by hot water, not only Legionella bacteria but also Cryptosporidium bacteria can be killed, which is extremely safe and sanitary. It is. In particular, it is possible to sterilize and wash even the suction point and the outflow point of the circulation pipe line 5 with the bath water sterilized and washed with the hot water pipe line. Secondly, since there is no possibility that the worker comes into contact with the disinfectant and its drainage, the washing operation can be performed safely. Thirdly, if sterilized and washed every day, not only the occurrence of "slim" in the circulation pipeline 5 can be prevented, but also the cleanliness in the bathtub 10 can be sufficiently secured even if the sterilized and washed bath water is returned into the bathtub 10. And so on.

Further, according to the second aspect of the present invention, the connecting pipeline 6,
By providing the sub-connection line 7, the three-way valve V, the first opening / closing valve V1, and the second opening / closing valve V2, even the suction point and the outflow point of the circulation line 5 with the hot water line sterilized and washed bath water. There is an advantage that sterilization cleaning can be performed reliably.

According to a third aspect of the present invention, in the second aspect,
The three-way valve V is controlled by three on-off valves, so that
The same operation as described above can be performed, and sterilization and cleaning can be performed even at the suction point and the outflow point of the circulation pipeline 5 with the bath water similarly sterilized and washed with the hot water pipeline.

According to a fourth aspect of the present invention, in accordance with the second or third aspect, the hot water sterilization and cleaning command means 22 for starting and controlling the sterilization and cleaning time, and the valve control means 23 for controlling the pipe cleaning, drainage, etc. And means for controlling the temperature of hot water and bath water. The hot water disinfection and cleaning instruction means 22 stores a time setting section for setting a cleaning start time, and the set cleaning start time and cleaning time. By providing a pipe line sterilizing and purifying apparatus in a bath water circulating apparatus having a time storage unit, each valve is controlled for a predetermined time (for example, 3:00 am at midnight, etc.) for one or more days, By controlling the temperatures of water and bath water, the suction point and the discharge point of the circulation pipe 5 can be automatically sterilized and cleaned. By performing washing and disinfection by heat at regular intervals in this manner, it is possible to make it possible to hardly attach “nulls” that adhere to the pipelines of the bath water circulation device and become homes for various bacteria, etc. To perform sterilization washing,
There is an advantage that the bath water is not contaminated even if the sterilized and washed hot water flows into the bath water. In this regard, if the process is performed in a batch process, there is a possibility that a lump of “null” may flow out, and the problem that the bath water is contaminated is surely solved.

[Brief description of the drawings]

FIG. 1 is a block diagram of the present invention for automatically performing valve control and temperature control.

FIG. 2 is a flowchart of the first half of the present invention.

FIG. 3 is a flowchart of the second half of the present invention.

FIG. 4 is a flowchart of a normal operation.

FIG. 5 is a schematic view of a normal operation of the embodiment of the present invention.

FIG. 6 is a schematic view of a hot water pipeline sterilization cleaning circulation according to an embodiment of the present invention.

FIG. 7 is a schematic diagram of a hot water sterilization mode of a water pumping unit according to the embodiment of the present invention.

FIG. 8 is a schematic diagram of a hot water sterilization mode of a drainage part according to the embodiment of the present invention.

FIG. 9 (A) is a schematic view of a normal operation of another embodiment of the present invention, and FIG. 9 (B) is a schematic view of a hot water pipeline disinfection washing circulation of another embodiment of the present invention.

FIG. 10A is a schematic view of a normal operation of another embodiment of the present invention, and FIG. 10B is a schematic view of a main part of a hot water pipeline sterilization washing circulation of another embodiment of the present invention. ) Is a schematic view of a main part of a hot water sterilization mode of a water pumping section according to another embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Heater 2 ... Filter 5 ... Circulation line 6 ... Connection line 7 ... Sub connection line 10 ... Bathtub 22 ... Hot water disinfection washing instruction means 23 ... Valve control means P ... Circulation pump V ... Three-way valve V1 ... 1st close valve V2 ... second on-off valve _{V 1, V 2, V 3} ... off valve

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[Procedure amendment]

[Submission date] December 27, 1997

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0003

[Correction method] Change

[Correction contents]

[0003]

As described above, a large amount of chemicals must be used in order to add a disinfectant to hot water in a bathtub, which is uneconomical or requires cleaning of the bathtub after use of the chemicals. did not become. Under such circumstances, the applicant has developed an apparatus for sterilizing and cleaning only the inside of the circulation pipeline with hot water. In this device, the main part of the circulation pipe was circulated with hot water, and the hot water was discharged out of the bathtub. That is,
Hot water is allowed to flow out to prevent the bather from hitting the bather at the bathtub for safety. In this method, hot water is circulated and discharged in a main part of the circulation pipeline, and a configuration that can wash hot water with respect to the entire circulation pipeline is also demanded. That is, it has been demanded that hot water sterilization and cleaning be periodically performed on the entire circulation pipeline.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0022

[Correction method] Change

[Correction contents]

According to a fourth aspect of the present invention, in accordance with the second or third aspect, the hot water sterilization and cleaning command means 22 for starting and controlling the sterilization and cleaning time, and the valve control means 23 for controlling the pipe cleaning, drainage, etc. And means for controlling the temperature of hot water and bath water. The hot water disinfection and cleaning instruction means 22 stores a time setting section for setting a cleaning start time, and the set cleaning start time and cleaning time. By providing a pipe line sterilizing and purifying apparatus in a bath water circulating apparatus having a time storage unit, each valve is controlled for a predetermined time (for example, 3:00 am at midnight, etc.) for one or more days, By controlling the temperatures of water and bath water, the suction point and the discharge point of the circulation pipe 5 can be automatically sterilized and cleaned. As described above, by performing cleaning and sterilization by heat at regular intervals, when the hot water flows into the bathtub 10, there is an advantage that substantially the entire circulation pipe can be subjected to hot water sterilization and cleaning. By performing the water disinfection cleaning, there is an advantage that the bath water is not contaminated even if the sterilized and washed hot water flows into the bath water. That is, even if the circulation pipe is washed with hot water and then flown into the bathtub 10 every day or the like, the contamination problem can be reliably prevented. Furthermore, even if the hot water flows into the bathtub 10, the danger or the like due to the hot water can be reliably avoided if the user is in a conscious state.

Claims (4)

[Claims] 1. A heater capable of heating bath water from a low temperature to a high temperature, a circulation pump for circulating the bath water, and a circulation line for returning the bath water from the bathtub to the bathtub by the circulation pump. A connecting line connecting an appropriate position on the suction side of the circulation line and an appropriate position on the outflow side of the circulation line, and a connecting point of the connection line on the outflow side of the circulation line And a sub-connection pipe provided between a suitable position closer to the center side than the connection point of the connection pipe on the suction side of the circulation pipe and a suitable location closer to the suction side than the connection point. At the time of sterilization washing, the bath water in the circulation pipe can be circulated through the connection pipe and the sub-connection pipe while being heated by the heater, and at the time of drainage, hot water sterilized and purified in the circulation pipe is circulated through the circulation pipe. Bath water circulation characterized by being able to drain water from the suction point or outflow point of the road Pipe line sterilization and purification device in the ring device. 2. A heater capable of heating bath water from a low temperature to a high temperature, a circulation pump for circulating the bath water, and a circulation line for returning the bath water from the bathtub to the bathtub by the circulation pump. A connecting line connecting an appropriate position on the suction side of the circulation line and an appropriate position on the outflow side of the circulation line, and a three-way valve provided at a base of the connection line on the outflow side. When,
An appropriate position closer to the center side than the connection point of the connection pipeline on the outflow side of the circulation pipeline, and an appropriate position closer to the suction side than the connection location of the connection pipeline on the suction side of the circulation pipeline. Between the auxiliary connecting line provided between the circulating line and the auxiliary connecting line,
A first on-off valve provided at an appropriate position between a connecting point of the connecting pipe and a connecting point of the sub-connecting pipe, and a second on-off valve provided on the sub-connecting pipe; In some cases, the bath water in the circulation pipeline can be circulated through the connection pipeline and the sub-connection pipeline while being heated to a high temperature by the heater, and at the time of drainage, hot water sterilized and purified in the circulation pipeline is supplied to the circulation pipeline. A pipe line sterilizing and purifying device in a bath water circulation device, wherein drainage can be performed from a suction point or an outflow point. 3. A heater capable of heating bath water from a low temperature to a high temperature, a circulation pump for circulating the bath water, and a circulation line for returning the bath water from the bathtub to the bathtub by the circulation pump. A connecting line connecting an appropriate position near the suction side of the circulation line and an appropriate position near the outflow side of the circulation line, and a position close to a base portion of the connection line near the outflow side. Three on-off valves respectively provided at two places in the circulation line and one place in the connection line, and an appropriate position closer to the center side than the connection point of the connection line on the outflow side of the circulation line and the circulation A sub-connection pipe provided between an appropriate position closer to the suction side than a connection point of the connection pipe on the suction side of the pipe, and a connection point of the connection pipe on the suction side of the circulation pipe. A first on-off valve provided at an appropriate position between the connection point of the sub-connection pipe, and a first on-off valve provided at the sub-connection pipe A second opening / closing valve, which can be circulated through the connection pipe and the sub-connection pipe while the bath water in the circulation pipe is heated by a heater during sterilization and washing of the pipe; A hot water sterilized and purified in the inside of the circulation pipe can be drained from a suction point or an outflow point of the circulation pipe. 4. The hot water and bath water according to claim 2 or 3, wherein hot water sterilization and cleaning command means for starting and controlling the sterilization and cleaning time, valve control means for controlling the line cleaning, drainage, and the like. Means for controlling the temperature of the hot water disinfection cleaning instruction means, a time setting unit for setting a cleaning start time, and a time storage unit for storing the set cleaning start time and the cleaning time. A line sterilization and purification device in a bath water circulation device.