JPH11223388A - Hot water thermal sterilizer for hot water circulation device for bathtub - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a hot water thermal sterilizer in a hot water circulation device for a bathtub which allows expectation of sterilizing effect while achieving a higher heating efficiency by prolonging contact time and extending a contact distance between hot water and a heater without growing size of the heater. SOLUTION: In a hot water circulation apparatus for a bathtub which is provided with a filter and a circulation pipeline and a pump to accomplish forced circulation of hot water in a bathtub, a cylindrical casing 11 is provided at a part of the hot water circulation pipeline and a bar-shaped heater 12 is provided at the center part thereof. A guide plate 13 is so arranged to be wound spirally on the perimeter of the heater 12 to spirally section an internal space of the cylindrical casing 11. Numerous tiny holes 13a are bored into the guide plate 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water heating / sterilizing device for a hot water circulation device for a bathtub.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 3, a hot water circulating device for a bath tub draws hot water in a bath tub 1 by a pump 2 and jets the hot water into a bath tub from a nozzle 3 (ejector) provided with bubble generating means. A filter device and a heating device H comprising a pre-filter 5 and a main filter 6 are provided on 4 so that bubble massage can be performed by an aerated water stream jetted from the nozzle 3, and a bathtub is provided by the filter devices 5 and 6. The scum and foreign matters in the warm water in the inside are decomposed and cleaned, and the heating device H keeps the warm water at an appropriate temperature so that the bath can always be taken.

The heating device H heats hot water flowing through the casing by means of a heater provided in a casing connected in the middle of the hot water circulation pipe 4. If the size of the heater is increased for the purpose, the size of the apparatus is increased and the manufacturing cost and running cost are also increased. Conversely, when the heating time is to be improved by increasing the contact time with the heater, the flow rate of the aerated water jet ejected from the nozzle 3 tends to decrease due to the increase of the flowing water resistance.

Further, such a hot water circulating device for a bathtub is
Long-term use of hot water saves tap water, and
The purpose of this method is to save fuel or electricity for heating the tap water from the temperature to a suitable temperature for bathing, but it has been pointed out that there is a problem of Escherichia coli and the like when the hot water is used for a long time. Therefore, conventionally, means such as a sterilizer or a sterilizing filter using ultraviolet rays or ozone have been taken. On the other hand, Escherichia coli is weak to heat, and depending on the type, 30 seconds in hot water of 75 ° C.,
At 100 ° C., it will die in a few seconds, so the heating device H is improved and its heat energy is used for sterilization means, or
It is also considered effective to use it with an existing sterilizer.

[0005]

SUMMARY OF THE INVENTION In view of these points of the conventional heating apparatus, the present invention can increase the contact time and contact distance between hot water and the heater without increasing the size of the heater, thereby improving the heating efficiency. The object of the present invention is to provide a hot water heating and sterilizing apparatus in a hot water circulating apparatus for a bathtub, which is capable of achieving a sterilizing effect as well as being capable of performing the sterilizing effect.

[0006]

SUMMARY OF THE INVENTION In a hot water circulation device for a bath tub comprising a filtration device and a circulation line for forcibly circulating hot water in a bath tub through the filtration device and a pump, a part of the hot water circulation line is provided. A cylindrical heater is provided, and a rod-shaped heater is provided at the center of the cylindrical casing, and a guide plate which is spirally wound around the heater and partitions the inner space of the cylindrical casing into a spiral is provided. Was. Further, the heater is
The central part has a tubular shape with a water hole formed therein, and the base end, which is a non-heating part of the heater, penetrates one end surface of the cylindrical casing and is connected to one of the hot water circulation paths outside the cylindrical casing, In addition, the front end of the heater opens the water passage hole near the other end surface inside the cylindrical casing, and connects the other hot water circulation path near the one end surface of the cylindrical casing. Furthermore,
Many small holes were drilled in the guide plate.

[0007]

Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a heat sterilizer H according to an embodiment of the present invention.
It shows. In the figure, the heat sterilizer H mainly includes a casing 11, a heater 12, and a guide plate 13.

The casing 11 basically has a cylindrical shape, and a lid 14 is provided at an opening at one end 11a, which is an upper side in the figure.
And one end 1 of the peripheral side of the casing 11.
In the vicinity of 1a and in the vicinity of the other end 11b, connecting portions 15 and 16 of a circulation pipe (pipe) of hot water are formed, respectively.

The heater 12 is a ceramic heater formed in a rod shape. The base end 12a, which is a non-heat-generating portion, is fitted and fixed to the lid 5 so that a cylindrical casing 11 is formed.
And the tip 12b of the heater 12
Has reached the vicinity of the other end 11b of the casing 11.

The guide plate 13 is spirally wound around the heater 12 and divides the space inside the casing around the heater 12 into a spiral shape. Has been drilled.

Next, the operation will be described based on the above embodiment.

The hot water in the bathtub 1 drawn into the circulation line 4 by the action of the pump 2 in the hot water circulation device shown in FIG. Will be introduced.

The hot water introduced into the casing 11 from one connecting portion 16 of the heat sterilizer H shown in FIG. 1 is heated in the casing 11 by contact with the heater 12 and sent out from the other connecting portion 15. Is done.

At this time, in the casing 11, the hot water is guided by the guide plate 13 and rises while spirally orbiting around the heater 12.
The contact time and the contact distance are increased, and the stirring and convection are promoted. Further, a small hole 13a formed in the guide plate 13 is provided.
As a result, a water flow passing through the small holes 13a is generated, and the stirring and convection of the warm water are further promoted, whereby the heating efficiency is remarkably improved. Despite these effects, the casing 11
Since the inside is partitioned by the guide plate 13, a spiral swirling water flow is generated, and the water flow resistance hardly increases.

In the above process, E. coli and the like in the warm water are sterilized by the sufficient contact between the heater 12 maintained at a high temperature and the warm water and the impact of the stirring of the warm water. This disinfecting action does not affect the entire flowing hot water, but usually the hot water in the bathtub is heated and disinfected by a hot water circulating device having a capability of circulating hot water equivalent to the total hot water in the bathtub in about 15 minutes. By continuously circulating H, the bactericidal action becomes effective.

FIG. 2 shows a heat sterilizer H 'according to another embodiment of the present invention. In the figure, the heat sterilizer H ′ has a heater 22 supported by a lid 24 fitted to one end 21 a of a casing 21, at the center thereof.
The casing 22 has a tubular shape in which a water passage hole 26 penetrating from the outside to the inside is formed, and a base end portion 22a, which is a non-heat-generating portion of the heater 22, forms a connecting portion of one hot water circulation pipe, and The tip 22b of the heater 22 is
The water hole 26 is opened in the vicinity of the other end 21b inside 1. The connection portion 25 of the other hot water circulation pipe is provided on a side wall portion near one end portion 21a of the casing 21, and the other end portion 21b of the casing 21 is closed.

In the heat sterilizer H ', the hot water is heated by coming into contact with the inner peripheral surface (water flow hole 26) of the heater 22 in the process of introducing the hot water into the casing 21 through the water flow hole 26. Is different from the above-described heat sterilization apparatus H, and thereafter, the outer peripheral surface of the heater 22 is guided by the guide plate 23 having the small holes 23a, and rises while spirally surrounding the periphery of the heater 22. Is similar to the above-described heat sterilizer H in that the hot water is further heated by contacting the hot water.

The direction of the water flow can be reversed. Further, the above configuration of the heat sterilizers H and H 'of the present invention is also effective when a rod-shaped or tubular heater using a heating element other than ceramic is used for the heaters 12 and 22.

[0020]

According to the present invention, the hot water heating and disinfecting device in the hot water circulating device for a bathtub is constructed as described above, so that the contact time and contact distance between the hot water and the heater can be reduced without increasing the size of the heater or casing. It is possible to increase the heating efficiency and to improve the heating efficiency, as well as to enhance the heating efficiency, and to make the contact between the heater and the hot water maintained at a high temperature and the shock at the time of the stirring of the hot water possible. Accordingly, a bactericidal effect on E. coli and the like in warm water can be expected. Also, despite these effects, an increase in flowing water resistance and a decrease in the momentum of the aerated water flow due to this are prevented, which is optimal for a hot water circulating device that performs bubble massage.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a heat sterilization apparatus according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view showing a heat sterilizer according to another embodiment of the present invention.

FIG. 3 is a schematic view showing a hot water circulation device for a bathtub.

[Explanation of symbols]

 H, H 'Heat sterilizer 11,21 Casing 12,22 Heater 13,23 Guide plate 13a, 23a Small hole 26 Water passage hole

Claims (3)

[Claims] 1. A hot water circulation device for a bathtub, comprising: a filtration device; and a circulation line for forcibly circulating hot water in a bathtub through the filtration device, and a pump. And a rod-shaped heater is provided at the center of the cylindrical casing, and a guide plate which is spirally wound around the heater and helically partitions the internal space of the cylindrical casing is provided. A hot water heating and sterilizing device in a hot water circulation device for a bathtub. 2. A heater having a tubular shape having a water passage hole formed at the center thereof, and a base end, which is a non-heat-generating portion of the heater, penetrates one end surface of the tubular casing and is connected to one end outside the tubular casing. And the tip of the heater opens the water passage hole near the other end face inside the cylindrical casing, and the other hot water circulation path is connected near the one end face of the cylindrical casing. Item 2. A hot water heating / sterilizing device in the bathtub hot water circulation device according to Item 1. 3. The hot water heating / sterilizing apparatus for a bathtub hot water circulation apparatus according to claim 1, wherein a large number of small holes are formed in the guide plate.