JPH1183164A - Bathtub water filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reuse the hot water utilized for thermal sterilization as the bathtub hot water by supplying a filter means with sufficient quantity of hot water for raising the temperature of hot water in a bathtub to a set level or thereabout and then injecting the hot water into the bathtub. SOLUTION: At the time of thermal sterilization, the channel of a four-way valve Y is set from an inlet/outlet 1 to an inlet/outlet 2 similarly to the case of normal filtering operation and the hot water utilized for sterilization of a filtering tank 22 is not discharged but injected into a bathtub 10. Since the hot water utilized for sterilization is reused as the bathtub hot water, water consumption can be saved. The bathtub 10 is supplied with additional hot water, supplementary hot water supply is not required. Furthermore, the invention is contributive to energy saving because hot water having temperature higher than the general set temperature (40 deg.C or thereabout) in bathtub is supplied and thermal insulation energy is saved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bath tub water filtration device for purifying water by circulating water in a bath tub, and more particularly to flowing hot water having a predetermined temperature or higher through a filtration bath provided in the bath tub. The present invention relates to a bathtub water filtration device provided with a means capable of heat sterilization.

[0002]

2. Description of the Related Art Conventionally, there is a bathtub water filtration device for circulating and filtering water in a bathtub (hereinafter referred to as bathtub water).
Bathtub water is guided to a circulation path of the bathtub water filtration device, passes through a filtration tank provided in the circulation path, is purified by the filtration tank, and is returned into the bathtub.

[0003] The filtration tank is, for example, a filter that captures hair and dirt circulating with bath water, and a activated carbon for adsorbing human sweat and fat and other organic substances such as ammonia contained in hot water. Equipped with filter material.

As described above, bathtub water circulating in the circulation path is
Since it is purified by passing through the filtration tank provided in the circulation path and returned to the bathtub again, the propagation of various bacteria in the bathtub and the adhesion of scale to the bathtub due to the propagation of various bacteria are prevented,
The inside of a bathtub can be maintained hygienically.

[0005]

On the other hand, dust and organic matter trapped and adsorbed thereby adhere to the filtration tank, so that various bacteria can easily propagate there. Among various germs, there are malignant bacteria having a bad effect on the human body such as Legionella spp. Therefore, it is necessary to periodically sterilize the filtration tank and maintain it hygienically. The sterilization of the filtration tank is generally performed by sterilization using a chemical such as chlorine or heat sterilization using high-temperature hot water.

[0006] Sterilization treatment with chemicals requires specialized knowledge in handling chemicals such as chlorine and the cost of chemicals, which makes maintenance troublesome.

On the other hand, the heat sterilization treatment is carried out by passing hot water having a temperature equal to or higher than the above-mentioned predetermined temperature supplied to the circulation path from an external hot water generating means connected to the circulation path of the bathtub water filtration device. Will be Therefore, maintenance is easier than the sterilization treatment using the above-mentioned chemicals.

At this time, conventionally, the hot water used for the heat sterilization has been drained after the heat sterilization. However, since this hot water is hot water used for the sterilization treatment, no bacteria have propagated in the hot water,
It is a sanitary hot water.

Therefore, draining hot water used for sterilization is not preferable from the viewpoint of energy saving and water saving, and also contradicts the purpose of energy saving and water saving which are the objectives of the bathtub water filtration device.

Accordingly, an object of the present invention is to provide a bathtub water filtration device capable of reusing hot water used for heat sterilization as hot water in a bathtub.

[0011]

According to a first aspect of the present invention, there is provided a circulation system in which both ends are connected to a bathtub, and water in the bathtub flowing from one end is injected into the bathtub from the other end. A filtering means for filtering water in the bathtub provided in the circulation path and flowing through the circulation path; a hot water generating means for generating hot water; a circulation path upstream of the filtration means; A hot water supply path for supplying hot water from the hot water generating means to the circulation path, wherein hot water supplied from the hot water generating means flows through the filtration means,
In the bathtub water filtration device in which the filtration unit is subjected to heat sterilization, when hot water having a predetermined temperature is supplied from the hot water generation unit, the hot water is injected into the bathtub to raise the bathtub water temperature to a set temperature or a vicinity thereof. A bath tub water filtration apparatus comprising: a control unit for flowing an amount of hot water necessary for the hot water to the filtration unit, and for injecting the hot water into the bath tub after passing through the filtration unit.

With this configuration, the hot water used for the heat sterilization can be poured into the bathtub without being drained, and the bathtub water temperature can be raised to near the set temperature.

[0013] The bathtub water filtration device of the first configuration is provided with, for example, a water amount adjusting valve for adjusting the amount of hot water supplied from the hot water generating means. The opening degree of the water amount control valve is adjusted so that the hot water is supplied from the hot water generating means over the heat sterilization time.

Further, in the bathtub water filtration device having the first configuration, when the injection amount is smaller than a predetermined amount necessary for heat sterilization, the control means may supply a sufficient amount of hot water to expose the filtration means to the hot water. Therefore, the supply of hot water from the hot water generating means is on standby, and the supply of the hot water is performed when the injection amount becomes equal to or more than the predetermined amount.

[0015] In the bath water filtration apparatus of the first configuration, when the injection amount is smaller than a predetermined amount of hot water necessary for heat sterilization, the control means is sufficient to expose the filtration means to the hot water. Since it is not possible to secure the amount of hot water, it is not necessary to supply hot water from the hot water generating means.

Further, a second configuration of the present invention for achieving the above object has a circulation path having both ends connected to a bathtub and injecting water from the bathtub flowing from one end into the bathtub from the other end;
A filtration unit provided in the circulation path, for filtering water in the bathtub flowing through the circulation path, a hot water generation unit for generating hot water, the circulation path upstream of the filtration unit, and the hot water generation unit; A hot water supply path for supplying hot water from the hot water generating means to the circulation path, and hot water having a first temperature or higher supplied from the hot water generating means flows through the filtering means, In a bathtub water filtration apparatus in which heat sterilization of a filtration unit is performed, when a predetermined amount of hot water is supplied from the hot water generation unit, the hot water is injected into the bathtub to raise the bathtub water temperature to a set temperature or a vicinity thereof. A bathtub water filtration device, characterized by further comprising control means for flowing the hot water at a temperature required for the above to the filtration means, and for injecting the hot water into the bathtub after passing through the filtration means.

According to this configuration, the hot water used for the heat sterilization is injected into the bathtub without being drained, and the water temperature of the bathtub can be raised near the set temperature.

[0018] The bathtub water filtration device of the second configuration is provided with, for example, a water amount adjusting valve for adjusting the amount of hot water supplied from the hot water generating means. The opening of the water amount control valve is adjusted so that the water is supplied from the hot water generation means over a heat sterilization time.

In the bath tub water filtration device of the second configuration, the control means cannot expose the filtration means to a temperature required for heat sterilization when the temperature is lower than a predetermined temperature required for heat sterilization. The supply of hot water from the hot water generation unit is waited, and when the temperature becomes equal to or higher than the predetermined temperature, the hot water is supplied.

Further, in the bath tub water filtration device having the second configuration, when the temperature is lower than a predetermined temperature required for heat sterilization, the control means cannot expose the filtration means to a temperature required for heat sterilization. It is not necessary to supply hot water from the hot water generating means.

[0021]

Embodiments of the present invention will be described below with reference to the drawings. However, the technical scope of the present invention is not limited to this embodiment.

FIG. 1 is a configuration diagram of a bathtub water filtration device according to a first embodiment of the present invention. According to FIG. 1, the bathtub 1
0 is connected to both ends of a circulation path 20 through which the bath water circulates. Bath water drawn from one end 20a of the circulation path 20 is circulated in the direction of arrow A by a pump 21 provided in the circulation path 20. Flows in the passage 20 and the other end 2 of the circulation passage 20
0b is injected into the bathtub 10 again. And pump 2
The circulation path 20 downstream of the filter 1 is provided with a filtration tank 22 for filtering the circulating water and a temperature sensor 23 for detecting the temperature of the water flowing out of the filtration tank 22.

Further, on the downstream side of the pump 21,
A three-way valve K and a four-way valve M are provided in the circulation path 20 upstream of the filtration tank 22 in the circulation direction A in order, and a four-way valve Y is provided in the circulation path 20 downstream of the temperature sensor 23. Have been.

Further, the bathtub water filtration device of the present embodiment
For example, a control unit (not shown) such as a microcomputer is provided, and a filtering operation and a heat sterilization process described below are performed under the control of the control unit.

By the ordinary filtration operation of the bath water filter,
When the bathtub water is filtered, the water that has passed through the pump 21 is
The water flows from the entrance 1 of the three-way valve K to the entrance 2 and further flows from the entrance 1 of the four-way valve M through the entrance 2 to the inside of the filtration tank 22. The hot water flowing through the filtration tank 22 is subjected to removal of dust and organic matter by the filtering material in the filtration tank 22 and flows out of the filtration tank 22 as purified hot water.

Further, the hot water purified through the filtration tank 22 passes through the entrance 1 to the entrance 2 of the three-way valve Y and passes through the bath 1
Returned to 0.

Further, the bathtub water filtration device according to the present embodiment includes a backwashing circuit 30 for washing and discharging dust and the like adhering to the filtration tank 22 by the bathtub water flowing through the filtration tank 22 as described above. Have. When the filtration tank 22 is washed using the back washing circuit 30, first, the flow path in the four-way valve M is set in the direction from the entrance 1 to the entrance 4, and the hot water flowing through the circulation path 20 is guided to the back washing circuit 30. . Then, the hot water flowing in the back washing circuit 30 in the direction of arrow B flows from the entrance 4 of the three-way valve Y to the entrance 1 and the filtration tank 2
2 flows in the direction of arrow C. Then, hot water flows in the filtration tank 22 in a direction (arrow C) opposite to a normal circulation direction (arrow D) for purifying bath water, whereby the filtration tank 22 is cleaned.
The dirt and the like adhering to the filter are washed and further flow out of the filtration tank 22 in the direction of arrow C. At this time, the flow path of the four-way valve M is set in the direction from the entrance 2 to the entrance 3 of the four-way valve M, and the hot water flowing out of the filtration tank 22 is supplied to the entrance 2 of the four-way valve M.
Through the doorway 3 to drain.

Although the backwashing in which the water in the opposite direction (arrow C) flows into the filtration tank 22 to wash the filtration tank 22 removes most of the dust and organic substances attached to the filtration tank 22, The malignant bacteria propagated in the filtration tank 22 are not removed. Therefore, the bathtub water filtration device in the present embodiment,
Further, a hot water heat source device 40 as hot water generating means for supplying high-temperature hot water for heat sterilizing these malignant bacteria to the filtration tank 22 is provided externally. The hot water heat source 40 is, for example, a water heater.

Hot water (hereinafter referred to as “sterilized hot water”) generated by the hot water heat source device 40 and having a predetermined temperature (eg, 65 ° C.) or higher is
The circulation path 2 passes through the hot water supply path 41 provided with the on-off valve V.
0 is supplied. The hot water supply passage 41 is connected to the entrance 3 of the three-way valve K, and the hot water flowing into the hot water supply passage 41 passes through the entrance 2 from the entrance 3 of the three-way valve and passes through the circulation passage 20.
Supplied within. The sterilizing water flowing out of the three-way valve K from the entrance 2 flows through the filtration tank 22 from the entrance 1 to the entrance 2 of the four-way valve M. Then, the sterilizing water is continuously supplied from the hot water heat source device 40 for a predetermined heat sterilizing time (for example, 10 minutes or more when the temperature of the hot water is 65 ° C. or more), and the sterilizing water is supplied to the filtration tank 22.
, The filtration tank 22 is sterilized. Further, the amount of hot water supplied from the hot water heat source device 40 can be adjusted by a water amount control valve 42 constituted by, for example, a gear motor.

Here, conventionally, at the time of heat sterilization treatment,
Since the flow path of the four-way valve Y was set in the direction from the entrance 1 to the entrance 3, the sterilized hot water flowing out of the filtration tank 22 was drained through the drain 31. However, as described above, since the sterilized hot water flowing in the filtration tank 22 is originally a hot water having no hygiene problem, it is not preferable to drain the water from the viewpoint of energy saving and water saving.

Therefore, in the embodiment of the present invention,
At the time of the heat sterilization treatment, the flow path of the four-way valve Y is set in the direction from the entrance 1 to the entrance 2 which is the same as in the normal filtration operation, and the sterilizing water used for sterilizing the filtration tank 22 is not drained. Is poured into the bathtub 10. This makes it possible to reuse the sterilized hot water as bath water, thus achieving water saving. Then, since new hot water is supplied to the bathtub 10, it is not necessary to add hot water, and the load on the user (manual pouring) can be reduced. In addition, since hot water having a temperature higher than a set temperature of a general bathtub water (around 40 degrees) is supplied, energy for keeping the heat is saved, which contributes to energy saving.

Further, in the embodiment of the present invention, since the sterilizing water is not drained through the drain passage 31, the four-way valve Y of the bathtub water filtration device does not have the entrance 3 in the four-way valve Y, but the entrance 1 , 2 and 4 may be used.

In the embodiment of the present invention,
The amount of sterilized hot water supplied from the hot water heat source device 40 (hereinafter, referred to as sterilized hot water amount) is adjusted based on the water temperature of the bathtub 10 (hereinafter, referred to as bathtub water temperature) and the amount of water in the bathtub 10 (hereinafter, referred to as bathtub water amount). . More specifically, during the heat sterilization process, the temperature of the hot water supplied from the hot water heat source device 40 is fixed to a temperature required for heat sterilization (for example, 65 degrees) or higher, and the bathtub water temperature is set at or near the set temperature. The amount of sterilized hot water is supplied from the hot water heat source device 40 and passed through the filtration tank 22 and then injected into the bathtub 10. However, as will be described later in detail, the amount of the sterilized hot water was supplied at a flow rate not lowering the temperature of the hot water in the filtration tank 22 below the heat sterilizing temperature (for example, 65 ° C.) and flowing for the minimum heat sterilizing time (for example, 10 minutes). Sometimes it is necessary to exceed the minimum required amount of hot water (Qmin).

FIG. 2 is a diagram showing the relationship between the bathtub water temperature and the amount of bathtub water and the amount of sterilized hot water when the temperature of the sterilized hot water supplied from the hot water heat source device 40 is a fixed temperature of 65 degrees. The horizontal axis in FIG. 2 is the bathtub water temperature before the heat sterilization process is performed. The vertical axis indicates the amount of hot sterilizing water required to bring the bathtub water temperature to the set temperature (44 degrees in FIG. 2).

For example, as shown at a point P in FIG. 2, the bath water temperature (horizontal axis) before the heat sterilization treatment is 36 ° C., and the bath water amount is 100 ° C.
From the figure, the amount of hot sterilizing water required to bring the bath water temperature to the set temperature is about 38 liters. Therefore, when the heat sterilization process is performed, the opening degree of the water amount control valve 42 is adjusted so that the determined amount of hot sterilization water is supplied over a predetermined heat sterilization time, and the hot water heat source device 40 The determined amount of hot water (here, 38 liters) is supplied. For example, when the heat sterilization time when the heat sterilization temperature is 65 degrees is 10 minutes, the opening of the water amount control valve 42 is set to 3.8 liters / minute. Then, the hot sterilizing water is injected into the bath 10 through the hot water supply path 41 and the filtration tank 22 as described above. Thereby, the bathtub water temperature rises to the set temperature. That is, the heat treatment of the bathtub 10 can be performed simultaneously with the heat sterilization.

FIG. 3 is a flowchart of the heat sterilization process according to the embodiment of the present invention. Referring to FIG.
The above embodiment will be described in more detail. According to FIG. 3, when a normal filtration operation is performed in step S1, as shown in step S2, heat sterilization is performed by a control means such as a microcomputer receiving a heat sterilization signal instructing heat sterilization. Be started. The heat sterilization signal is
For example, it is transmitted when the user operates a remote controller (not shown). Further, a heat sterilization signal may be automatically output at predetermined time intervals by a clock function of the control means, and heat sterilization processing may be performed.

In step S2, when the microcomputer as the control means receives the heat sterilization signal, in step S3, the microcomputer determines the bathtub water temperature,
The amount of hot sterilized hot water is calculated from the bathtub water volume and the set bathtub temperature. Specifically, for example, the graph shown in FIG.
Each set temperature is stored in a memory such as a ROM of a microcomputer. Then, the amount of hot sterilized hot water is read from the detected bath water temperature and bath water amount.

At this time, since the bathtub water temperature is the same as the water temperature flowing through the circulation path 20, it can be detected by the temperature sensor 23. Further, the bathtub water volume can be determined, for example, by multiplying a water level detected by a bathtub water level sensor not shown in FIG. 1 by a previously determined bottom area of the bathtub. The set temperature is set by a remote controller or the like.

The microcomputer can also calculate the amount of hot sterilized water by calculation. That is, the following equation (2) for obtaining the quantity of hot sterilized water Qk is obtained from the relational equation of the quantity of heat shown in the following equation (1). Qk × Tk + QB × TB = (Qk + QB) × Ts (1) Qk = QB × (Ts−TB) / (Tk−Ts) (2) where QB is a bathtub water amount and TB is The bathtub water temperature, Ts is a set temperature, and Tk is a heat sterilization temperature (a predetermined temperature, for example, 65 degrees). Then, the above equation (2) is stored in the memory, and the amount of hot sterilized water Qk is obtained by calculation of the CPU of the microcomputer.

Then, in step S4, it is determined whether or not the obtained hot water quantity Qk is equal to or more than the minimum hot water quantity Qmin necessary for sterilizing the filtration tank 23. Minimum quantity of hot water Q
As described above, min is the minimum amount of hot water that can expose the filtration tank 22 to the hot sterilized water during the heat sterilization time when the hot water having the amount of the hot sterilized water Qk flows through the filter tank 22 over the heat sterilization time. It is.

For example, when the bathtub water temperature is boiling up to near the set temperature, the amount of hot sterilized water Qk is small as is clear from FIG. With such an amount of hot water Qk, the flow rate per unit time flowing during the heat sterilization time becomes extremely small, so that the filtration tank 22 cannot be sufficiently immersed in the hot sterilization water, and the heat sterilization treatment may be insufficient. Therefore,
A determination is made as to whether or not the minimum hot water amount is equal to or greater than Qmin.

Further, in the above-mentioned FIG. 2 or the above equation (2), when the bathtub water temperature is boiling up to the set temperature, if hot sterilized water is poured into the bathtub 10, the bathtub water temperature will exceed the set temperature. The heat sterilizing water amount Qk becomes zero.

Therefore, in step S4, the hot-sterilized hot water amount Qk obtained in step S3 is equal to the predetermined minimum hot water amount Q.
If it is smaller than min, the process proceeds to step S5, and the heat sterilization process enters a standby state. The heat sterilization process is on standby until the amount of hot water to be sterilized Qk obtained in step S3 exceeds the minimum amount of hot water Qmin.

If the amount of hot water for sterilization Qk exceeds the minimum amount of water Qmin in step S4, the valves in FIG. 1 are switched in step S6. Specifically, the flow path in the three-way valve K is set in the direction from the entrance 3 to the entrance 2, and the on-off valve V of the hot water supply path 41 is opened. In addition, the opening of the water flow control valve 42 is determined by the determined amount of hot sterilized hot water Q
k is set so as to be supplied from the hot water heat source device 40 over a heat sterilization time. That is, the degree of opening of the water amount adjusting valve 42 is set to the amount of hot sterilized water Qk / the time of heat sterilization (liter / minute).

Then, sterilized hot water having a predetermined heat sterilizing temperature Tk is supplied from the hot water heat source device 40 through the hot water supply passage 41 to the circulation passage 20.
Supplied to When the temperature sensor 23 detects the heat sterilization temperature Tk (step S7), a timer built in the microcomputer starts to measure a predetermined time for exposing the filtration tank 22 to the sterilized hot water (step S8). .

Then, a predetermined heat sterilization time (heat sterilization temperature T)
When k is equal to or greater than 65 degrees, for example, for 10 minutes), the filtration tank 22 is exposed to sterilized hot water, and heat sterilization is performed. After the predetermined heat sterilization time has elapsed in step S9, the sterilization of the filtration tank 22 ends, and the valves switched in step S6 are returned to the state before the heat sterilization was performed (step S10). That is, the flow path of the three-way valve K is set in the direction from the entrance 1 to the entrance 2 and the hot water supply path 41
Is closed. Thus, the state returns to the normal filtration operation state again.

In the above embodiment of the present invention, the amount Qk of hot water for sterilization is determined so that the bathtub water temperature will reach the set temperature. However, in that case, as described above, if the bathtub water temperature has already reached or near the set temperature,
The heat sterilization process is on standby until the bathtub water temperature decreases (step S5 in FIG. 3). Therefore, in order to perform the heat sterilization process as soon as possible after the heat sterilization signal is issued, the heat sterilization hot water amount Qk may be determined so that the bath water temperature when the hot sterilization water is injected into the bathtub becomes higher than the set temperature. . The bathtub water temperature at this time is, for example, about the set temperature +2 degrees, and is set in a range where a person does not feel uncomfortable with the hot water at the set temperature. Thus, the heat sterilization process can be performed even when the bathtub water temperature is boiling up to the set temperature.

[Modification] In the embodiment of the present invention, the heat disinfection water amount Qk is fixed to the minimum water amount Qmin or a predetermined amount more than the minimum water amount Qmin, and the heat disinfection temperature Tk such that the bath water temperature becomes the set temperature. May be required. The following equation (3) for obtaining the heat sterilization temperature Tk from the above equation (1) is obtained. Tk = Ts + (Ts-TB) .times.QB / Qk (3) Alternatively, the microcomputer may store a graph of the heat sterilization temperature Tk similar to FIG. An example of this graph is shown in FIG. FIG. 4 shows that when the bathtub water volume is 170 liters, the hot water
It is a figure which shows the relationship between the bathtub water temperature and heat sterilization temperature (high temperature sterilization temperature) when liter of hot water is supplied. The horizontal axis in FIG. 4 is the bathtub water temperature before the heat sterilization process is performed. Also,
The vertical axis indicates the bathtub water temperature at the set temperature (44 degrees in FIG. 4).
Is the heat sterilization temperature Tk required to obtain

For example, according to FIG. 4, when the bath water temperature (horizontal axis) before the heat sterilization treatment is 40 ° C., as shown at point R in FIG. The heat sterilization temperature Tk required for the above is determined as 67 degrees.

When the heat sterilization temperature Tk is obtained (step S3 in FIG. 3), the calculated temperature T
It is determined whether or not k is the minimum temperature Tmin required for performing the heat sterilization (Step 4 in FIG. 3). Generally, in order to perform heat sterilization, the filtration tank 22 is heated in hot water of about 60 degrees or more.
Need to be exposed. Therefore, the minimum temperature Tmin is, for example, 60 degrees. Then, the heat sterilization temperature Tk becomes the minimum temperature T.
If it is lower than min, the process waits for the heat sterilization as in step S5 of the flowchart of FIG. Here, it is assumed that the hot water heat source device 40 can generate hot water having an arbitrary temperature equal to or higher than the minimum temperature Tmin.

The heat sterilization time in step S9 differs depending on the heat sterilization temperature Tk. Generally, the higher the heat sterilization temperature Tk, the shorter the heat sterilization time. Therefore,
In the valve switching in step S6, the opening degree of the water amount adjusting valve 42 is set such that the fixed amount of hot water for sterilization Qk is supplied from the hot water heat source device 40 over a heat sterilization time corresponding to the obtained heat sterilization temperature Tk. Is set. That is, the degree of opening of the water amount adjusting valve 42 is set to the amount of hot sterilized water Qk / the time of heat sterilization (liter / minute).

In the above embodiment of the present invention,
In order to avoid the standby state of the heat sterilization process as in step S5 of the flowchart of FIG.
And heat sterilization with hot water at the minimum temperature Tmin,
The hot water is poured into the bathtub 10. Thereafter, for example, cold water may be supplied to the bathtub 10 so that the bathtub water temperature becomes the set temperature.

Step S in the flowchart of FIG.
The required amount of hot sterilized hot water Q without the standby state as shown in FIG.
When k and the heat sterilization temperature Tk are lower than the minimum hot water amount Qmin and the minimum temperature Tmin, respectively, the heat sterilization process may not be performed.

FIG. 5 is a flowchart of another embodiment of the present invention. In the flowchart of FIG. 5, step S15 is provided instead of step S5 of FIG. In step S15 of FIG. 5, in step S4, the heat sterilizing water amount Qk and the heat sterilizing temperature Tk are respectively set to the minimum water amount Qmin.
When the temperature is lower than the minimum temperature Tmin, the heat sterilization signal is cleared. Therefore, heat sterilization is not performed.

[0055]

According to the present invention, when a filtration tank provided in a bathtub water filtration device is subjected to heat sterilization, hot water used for heat sterilization (hot sterilization water) is injected into the bathtub without being drained. . Therefore, the hot sterilized water is not wasted, is reused as bath water, and water saving and energy saving can be achieved.

Since the amount of hot water and the temperature of hot water are variable, the water temperature of the bathtub can be set to an arbitrary temperature (for example, a set temperature).

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a bathtub water filtration device according to an embodiment of the present invention.

FIG. 2 is a diagram showing the relationship between the temperature and amount of water in a bathtub and the amount of sterilized hot water.

FIG. 3 is a flowchart of an embodiment of the present invention.

FIG. 4 is a diagram showing a relationship between bath water temperature and high-temperature sterilization temperature.

FIG. 5 is a flowchart of another embodiment of the present invention.

[Description of Signs] 10 Bathtub 20 Circulation path 21 Circulation pump 22 Filtration tank 23 Temperature sensor 40 Hot water heat source device 41 Hot water supply path 42 Water volume control valve

Continued on the front page (72) Inventor Katsuya Kitayama 3-4 Fukamidai, Yamato-shi, Kanagawa Prefecture Inside Gaster Co., Ltd.

Claims (8)

[Claims] 1. A circulating passage having both ends connected to a bathtub and injecting water from the bathtub flowing from one end into the bathtub from the other end; Filtering means for filtering, hot water generating means for generating hot water, connecting the circulation path upstream of the filtration means and the hot water generation means, and supplying hot water from the hot water generation means to the circulation path A hot water supply path for performing hot sterilization of the filtration means by flowing hot water supplied from the hot water generation means through the filtration means, wherein hot water having a predetermined temperature is supplied from the hot water generation means. Is supplied,
The hot water is poured into the bath and the amount of the hot water required to raise the bath water temperature to or near the set temperature is flowed into the filtering means, and further injected into the bath after passing through the filtering means. A bathtub water filtration device comprising control means. 2. The apparatus according to claim 1, further comprising a water amount adjusting valve for adjusting an amount of hot water supplied from the hot water generating means, wherein the control means takes a predetermined heat sterilization time for the injected amount of hot water to generate the hot water. A bath tub water filtration device, wherein the degree of opening of the water amount control valve is adjusted so as to be supplied from the means. 3. The control unit according to claim 1, wherein the control unit waits for the supply of hot water from the hot water generating unit when the injection amount is smaller than a predetermined amount necessary for heat sterilization. The bathtub water filtration device, wherein the hot water is supplied when the amount becomes equal to or more than a predetermined amount. 4. The bathtub according to claim 1, wherein said control means does not supply hot water from said hot water generating means when said injection amount is smaller than a predetermined hot water amount required for heat sterilization. Water filtration device. 5. A circulation path having both ends connected to a bathtub and injecting water of the bathtub flowing from one end into the bathtub from the other end, and water provided in the circulation path and flowing through the circulation path. Filtering means for filtering, hot water generating means for generating hot water, connecting the circulation path upstream of the filtration means and the hot water generation means, and supplying hot water from the hot water generation means to the circulation path A hot water supply passage for performing hot sterilization of the filtration means by flowing hot water having a temperature equal to or higher than a first temperature supplied from the hot water generation means through the filtration means. When a predetermined amount of hot water is supplied from the means, the hot water is poured into the bath and the hot water at a temperature necessary to raise the bath water temperature to a set temperature or a vicinity thereof is flown to the filtration means, and further, A control means for injecting into the bath after passing through the filtering means. A bath water filtration device comprising a step. 6. The hot water generating means according to claim 5, further comprising a water amount adjusting valve for adjusting the amount of hot water supplied from the hot water generating means, wherein the control means takes a predetermined heat sterilization time for the hot water at the temperature. A bath tub water filtration device, wherein the degree of opening of the water amount control valve is adjusted so as to supply the water from the tub. 7. The control device according to claim 5, wherein when the temperature is lower than a predetermined temperature required for heat sterilization, the control unit waits for a supply of hot water from the hot water generation unit, and the control unit sets the temperature to the predetermined temperature. The bath water filtration device, wherein the hot water is supplied when the above is reached. 8. The bathtub water according to claim 5, wherein said control means does not supply hot water from said hot water generation means when said temperature is lower than a predetermined temperature required for heat sterilization. Filtration device.