JPH0347591A - Circulation apparatus of bathtub water - Google Patents

Abstract

PURPOSE:To prevent the injection of a sterilizing solution from increasing to an unnecessary degree by erroneous operation by performing jet air bubble operation for a predetermined time by an operating switch and injecting a predetermined amount of the sterilizing solution at the initial stage of sterilizing/ filtering operation performed for a predetermined time thereafter. CONSTITUTION:After the elapse of about 15min sufficiently developing filtering capacity from the point of time when jet air bubble operation is started by turning an operating switch ON, a pump 21 is simultaneously operated for about 10sec while a circulation pump 16 is operated to inject about 2cc of a sterilizing solution 19a in a filter 18. Since the circulation pump 16 is further operated for about 15 min, the sterilizing solution 19a is diffused into the circulating water of a water circuit 13 and the water in a bathtub 11 to kill various bacteria in the water and the greater part of killed bacteria and various live bacteria is filtered by the filter material 18c in the filter 18 and various bacteria are removed from the water of the bathtub 11 to keep the sanitation of the bathtub 11.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention is designed to eliminate the environment where domestic bath water is contaminated by jets, etc., and where bacteria have grown. The present invention relates to a bathtub water circulation device that allows bathing.

Conventional technology FIG. 5 is a system configuration diagram showing a conventional example.

In FIG. 5, the circulating water outlet 2 and inlet 6 of the bathtub 1 are piped with a water circuit 3, and a circulating pump 4° filter 5 is provided in the middle. With this configuration, the bath water is circulated, the filter 5 filters the pollutants discharged from the human body floating in the bath water, and the sterilizing liquid stored in the sterilizing tank 7 is injected into the water circuit 3. This kills bacteria that breed using pollutants as a nutrient source.

These sterilization and filtration systems are large-scale and used for commercial purposes, and the bathtub water becomes polluted in proportion to the number of bathers, and a dedicated maintenance manager injects sterilizing liquid as needed at the appropriate time, or From experience, the sterilizing solution was injected at a set time using a timer, and filtration was performed almost constantly to maintain the cleanliness of the bath water.

Problems to be Solved by the Invention As described above, with conventional technology, someone in the home is always responsible for maintaining and managing the bathtub water, which is extremely difficult in today's busy personal environments. This is a major drawback for its widespread use.

In addition, simply injecting an unnecessarily large amount of sterilizing liquid into the bathtub water will only increase the residual balanic concentration in the bathtub water beyond what is necessary to kill germs; Excess residual chlorine is released from the bath water as decomposed gas, and while at low levels it is disliked due to the smell of chlorine, at high levels it creates an unfavorable environment that can harm the human respiratory system. , maintenance and management of sterilizing solutions becomes an issue.

The present invention solves the above-mentioned problems, and aims to provide a bathtub water circulation device that automatically performs sterilization and filtration operation after bathing, and prevents the injection of sterilizing liquid from increasing unnecessarily due to erroneous operation. It is something.

Means for Solving the Problems In order to solve the above problems, the circulation system of the present invention includes a Wi-ring pump and a filter in a water circuit for circulating bath water, and a tank housing a sterilizing solution. The controller sequence for injecting the sterilizing liquid into the water circuit is to turn on the operation switch, perform jet bubble operation for a predetermined time, and then inject a predetermined amount of the sterilizing liquid at the beginning of the sterilization/filtration operation for a predetermined time. This is what I decided to do.

Effect With the above configuration, the filter installed in the water circuit that circulates the bath water sterilizes dirt contained in the bath water and bacteria that propagate using this as a nutrient source with a sterilizing solution, and then filters it with the filter. , when trying to keep bathtub water clean at all times, it is easy to use equipment for household use, and it is automated and can be maintained and managed safely. Even if the bathtub is opened, an unnecessary and dangerous amount of sterilizing solution is not injected, and the bathtub water can always be kept clean and safe.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 2 is a system configuration diagram of an embodiment of the present invention. In FIG. 2, the bathtub water coming out from the circulating water outlet 12 at the bottom of the bath Wi11 is connected to the water outlet F! It passes through @13, passes through a circulation device 14, and returns to the bathtub 11 through a jet nozzle 15 attached to the wall of the bathtub that generates a jet stream.

FIG. 1 is a sectional view of a circulation device according to an embodiment of the present invention.

In FIG. 1, the circulating water is first supplied to the inlet 1 of the circulation pump 16.
6a, is pressurized and discharged from the outlet 16b, flows through the pipe 17 into the water passage part 18a of the filter 18, and part of A enters the filtration chamber 18b, where it is filtered from the spool from the outer periphery of the filtration filter 18c. The central space is guided to the bottom outlet while being filtered by the filter 18c, while the remainder B passes through the bypass path 18d, joins the flow at the bottom outlet again, and returns to the bathtub 11.

A sterilizing liquid supply circuit is provided separately from the circulation waterway, and the sterilizing liquid 19a stored in the sterilizing tank 19 is suctioned from the upper part of the sterilizing tank 19 via a pipe 20a by a pump 21, and is pressurized to a pipe 20b. from there to the upper part of the filter 18 and supplied to the filtration chamber 18b. The sterilizing tank 19 is provided with a pipe 19c suspended from the lid 19b and a liquid level sensor 19d for detecting the liquid level of the sterilizing liquid 19a. A controller 23 controls the circulation pump 16 and the pump 21 for inflowing the sterilizing liquid. In addition, 24 is the filtration chamber 18
The air bleed valve 25 is a case that houses these components.

Next, the operation of the above configuration will be explained. Fill the bathtub 11 with hot water,
When the operating switch is turned on at an operating section (not shown) in the bathroom, the controller 23 receives a signal from the operating section and drives the circulation pump 16. The bathtub water passes through a filter 18, a part of which is filtered A, and is vigorously sprayed into the bathtub 11 from the jet nozzle 15 again, and a jet bubble operation is performed to give appropriate stimulation to the surface of the human body. At this time, aged skin tissue on the surface of the human body peels off and is released into the bath water as grime.

In addition, bacteria in the atmosphere in the bathroom or attached to the surface of the human body are mixed into the bath water and increase when growth conditions such as the bath water temperature and the above-mentioned sludge are satisfied.

Therefore, after turning on the operation switch and starting the jet bubble operation, after about 15 minutes have elapsed until the filtration performance is fully exhibited, the circulation pump 16 is started to be operated.
was operated for about 10 seconds to transfer about 2cc of sterilizing liquid 19a to filter 1.
Inject into 8. Since the circulation pump 16 continues to operate for about 15 minutes, this sterilizing liquid 19a is diffused into the circulating water in the water outlet passage 13 and the bath water in the bathtub 11, killing bacteria in the water, and removing the dead bacteria and living organisms. Most of the bacteria are in the filter 1.
The bathtub water is filtered by a filter 18c in the bathtub 8, and bacteria are removed from the bathtub water to maintain cleanliness. Also, during jet bubble operation, you may want to take a normal bath by circulating the bath water, or you may not want to continue using sterilization and filtration even after 15 minutes have elapsed, so in this case, turn off the operation switch. It also has a function that stops further operations if you hold it down for about 2 seconds. Regarding the appropriate filtration time after injecting the sterilizing solution, 70-80% of the contaminants can be filtered out in about 5 minutes of operation, but 90% or more of the filtration cannot be achieved when filtering hair, etc. without running it for about 15 minutes. So I set it to this time.

Next, the performance of sterilizing and filtering bath water according to this example will be described. In general, general bacteria (miscellaneous bacteria) in bathtub water are sterilized by methods such as decomposition by bacteria, ultraviolet irradiation, and mixing of ozone into the water, with the exception of special bacteria that are often present in daily life. There is a method of injecting the sodium hypochlorite solution used in the example into water and contacting bacteria and decomposing it with the residual chlorine that decomposes and generates in the water. In this example, we adopted the sterilization method using sodium hypochlorite solution as the method that exhibits the most efficient sterilization effect among these methods, but performance comparisons with other methods are not the focus of this article, so they are excluded. do. Therefore, the effectiveness of this method as a method for sterilizing household bathtub water will be discussed below.

Figure 3 shows the degree to which the bathtub water gets dirty due to differences in bathing methods, using the amount of increase in COD (oxygen consumption) as a scale. As can be seen in the case of bubble bathing (indicated by the "X" mark and dashed line), bubble bathing clearly does not pollute the bath water and has a high level of water flow. This is because the force and bursting energy of bubbles strips aged skin tissue from the body surface and pollutes the bath water, and general bacteria that have entered the bath water feed on this and multiply, further polluting the bath water. be.

On the other hand, in jet bubble bathing, if the bather performs the sterilization and filtration operations of approximately 10 seconds of sterilizing liquid injection and 15 minutes of filtration operation after each bath, as in this example, the "OJ mark" The increase in COD as shown by the solid line is smaller than when taking a normal bath, and clean bath water is obtained.Here, the data for each bath is measured during the sterilization and cleaning process after the bather has finished bathing. be.

However, the test conditions were that the bathtub water was filled with approximately 200μ of water, and that the bathers washed their bodies and hair with body shampoo and hair shampoo under the same conditions as when taking a normal bath. Replenish water to maintain 200μ tension, and use 2cc of 6% undiluted sterilizing solution 19a at a time.
The calculated residual chlorine concentration is 0.6p1111. In addition, the residual chlorine concentration in tap water is 1±0 at the end.
．． 5111) It is managed to a level of II. In addition, the filtration flow rate is about 40ρ/min, and the filtration filter has a roughness of 100 mesh, an outer diameter of about 75 pores, a thickness of about 20 mm, and a length of about 250 mm.
The equipment was set up in double rows, the total circulation flow rate for the jet bubbles was approximately 80Ω/min, and everyone was required to take a 5-minute jet bubble bath during bathing. In addition, sterilizing liquid 19
A diaphragm pump was used as the pump 21 for injecting a, and was designed to deliver 2 cc in about 10 seconds.

These test conditions are also common to the test regarding the increase in the number of general bacteria, which will be described later, and the present example is configured according to these conditions. Of course, even for household use, the capacity of bathtubs has recently become larger; for example, the water capacity of bathtubs has increased to 250
Under conditions where the amount of water increases, the amount of sterilizing solution 1 increases in proportion to the increase in the amount of water.
It is better to increase the injection amount of 9a by 0.5cc to 2.5cc.
This is handled by providing a setting switch for the sterilizing liquid injection amount so that the injection amount of 19a can be selected at the time of equipment installation.

Figure 4 shows test data showing changes in the number of bacteria in 1a due to bathing.
, B1 , ct , DIEl and Fl for the elapsed time after filling the bath with water, and after each bath, a sample liquid was collected and the number of common bacteria was measured and the value is shown in the position along the vertical axis. At this time, the case where the sterilizing solution 19a is injected and the operation switch is operated to maintain cleanliness after each bath is "
The case where only filtration was performed without injecting the sterilizing solution 19a is shown by the "XJ" mark and a broken line.
The part that starts after 4 hours shows bathing data when fresh water was filled and the bathtub water on the day six people took a bath was reheated the following month, and six more people took a bath again. As is clear from FIG. 4, the number of general bacteria increases to 104 to 105 per rubel at the end of everyone's bathing in the latter case, but compared to this, it is almost a few or less in the former case. This is the same as the level of completely new bathtub water when a clean bathtub 11 is filled with fresh water and has not yet taken a bath. This allows you to take a fresh and pleasant bath.

In the case of only filtration operation, the increase in general bacteria will further increase the size of the filtration film 18c, and the size of general bacteria, about several micrometers, will increase, for example, by 1.
If a material with a particle size of 0 mesh or less is used, it will be well filtered and the amount will be considerably reduced compared to the one shown in the figure. However, this level
If the fill roughness is lowered to the limit, the filter 18c will become severely clogged, requiring frequent maintenance for cleaning and replacing the filtration filter 18c, making it unsuitable for household use. Therefore, in order to maintain the cleanliness of bathtub water, it is rational to use sterilization methods in addition to relying only on filtration. In addition, general bacteria are 40
The environment where the bath water temperature is around ℃ is the optimum temperature for survival and is the perfect environment for proliferation. In this practical filtration filter 18c, the growth rate of general bacteria is higher than that, and the number of bacteria increases to the level of 104 to 105 even on the day of bathing, and the suppression of growth is less than 1m, so it is necessary to use it in combination with sterilization means. It is.

Next, when the operation switch is turned on at a short interval by multiple bathers, the concentration of the sterilizing liquid 19a in the bathtub water becomes abnormally high, leading to a dangerous situation. I will explain the operation at the time. As already mentioned in the explanation of FIG. 3, in this embodiment, the water filling amount of the bath w111 is set to 2002, the injection amount of the sterilizing solution 19a per injection is 2 cc, and the residual chlorine concentration in the bath water is approximately 0. , 6 ppm. This residual chlorine concentration gradually decreases due to the progress of the bactericidal action and the fact that it is naturally released from the bath water as decomposed gas over time, and reaches zero at a bath water temperature of approximately 40°C.
．． When the amount is less than 2 ppI'1, bacterial growth becomes greater than the bactericidal effect, and the inhibition of bacteria decreases and gradually increases. For this reason, especially after using a jet bubble bath where the bathtub water is exposed to the surface, it is recommended to inject the sterilizing liquid 19a and perform the filtration operation every time, but please be careful if the general user forgets to perform this operation after taking a bath. In this case, there is no problem for the next bather who likes cleanliness to always perform the sterilization and filtration operation before taking a bath. However, if the next bather does the sterilization/filtration operation again without knowing this fact, the residual chlorine concentration in the bathtub water will simply double to 1.2oon.
You will have to take an unpleasant bath that smells like limescale. Furthermore, when housewives carefully carried out sterilization and filtration operations during this period, the residual chlorine concentration tripled to 1.8pp11.
As it approaches, the situation gradually becomes unfavorable.
These operations correspond to erroneous operations.

In this embodiment, in order to prevent this erroneous operation, even if the operation switch is turned on again after the previous jet bubble operation and the subsequent sterilization/filtration operation, 30 minutes have not elapsed since the previous sterilization/filtration operation. In the case of timing, the control 323 performs only the jet bubble operation and does not perform the subsequent sterilization/filtration operation, and prevents the sterilization/filtration operation from being performed manually.

This makes it possible to prevent one or two unnecessary and undesirable sterilization and filtration operations in cases such as the above-mentioned example. In addition, if 30 minutes have passed since the sterilization/filtration operation after the previous bath, the sterilization effect will progress during this time and the residual chlorine concentration will be 0.
The residual chlorine concentration has decreased to about 3 to 0.4 pprM, so even if the sterilizing solution 19a is injected here, the residual chlorine concentration is 1.0 ppn.
It is suppressed to the level below, and the chlorine odor is almost unnoticeable.

Effects of the Invention As described above, according to the present invention, in order to suppress general bacteria that proliferate in bathtub water during bathing and to always have a clean and comfortable bathing, sterilization and filtration operation is automatically performed after bathing. It is possible to prevent this operation from increasing unnecessarily due to erroneous operation and conversely making the bathing environment uncomfortable and dangerous. In particular, it is necessary to ensure safety when a child repeatedly operates a switch needlessly as if it were a plaything, or when an elderly person who is weak in operating machines repeatedly operates the switch, and to prevent the mistake of accidentally reoperating the switch within a short period of time. It is possible.

Furthermore, by safely employing sterilization and filtration operations, it is possible to always take a bath in the comfortable and fresh bath water of ``Ichibanburo'', and of course the effect of the jet bubble bath is fully demonstrated.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a circulation device according to an embodiment of the present invention, Fig. 2 is a system configuration diagram using the same circulation device, and Fig. 3 is a diagram without test data of COD increase amount for each bath type. , Figure 4 is a diagram showing test data on changes in the number of general bacteria due to bathing,
FIG. 5 is a system configuration diagram of a conventional example. 13...Water circuit, 14...Circulation device, 15...Jet nozzle, 16...Circulation pump, 18...Filter, 19...Sterilizing tank, 21...For sterilizing liquid injection Pump, 23...controller.

Claims (1)

[Claims] 1. A circulation device installed in a water circuit that circulates bath water in a bathtub, which includes a circulation pump, a filter, a tank containing a sterilizing solution, and a jet for a predetermined period of time when the operation switch is turned on. A bathtub water circulation device comprising a controller having a sequence of performing a bubble operation and then injecting a predetermined amount of sterilizing liquid at the beginning of a sterilization/filtration operation for a predetermined period of time.