JP2002071214A - Flowing water heating equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide flowing water heating equipment which can inexpensively heat ground water, etc., with high thermal efficiency while the equipment maintains a large volume of hot water discharge. SOLUTION: This flowing water heating equipment is composed of a heating tank 21 which is divided into a heating air supplying section 22 and a flowing water housing section 23 by a heating plate 31 carrying a plurality of perforated caps 32 respectively fixed to holes, an air supplier 24 composed of a blower, a pipe line 25 which is connected between the heating air supplying section 22 and blower 24 and has an air heating section 26 at a midpoint, and a high-frequency oscillator 27. The heating plate 31 and perforated caps 32 are made of a metal having good thermal conductivity and a high corrosion resistance. A swirling flow generating cap 33 having a plurality of air outlets (a) opened in the tangential direction is fixed to a position where the cap 33 covers the opening of the piping of the heating air supplying section 22. The heating section 26 is composed of a ceramic tubular body 41, an iron tubular body 42 laid closely to the tubular body 41 on the inside of the body 41, an iron tubular body 43 housed on the inside of the tubular body 32 with an interval in between, and a work coil 44 which is wound around the ceramic tubular body 41 and connected to the oscillator 27.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flowing water heating apparatus which raises the temperature to about 50.degree. C. so that groundwater such as well water or a lukewarm hot spring can be used for bathing.

[0002]

2. Description of the Related Art Well water and groundwater have a temperature of about 15 ° C.
Hot springs are too warm for bathing (25 ° C
Degree). In order to supply such groundwater for bathing, generally, in consideration of heat loss cooling from a hot water supply pipe, the temperature must be raised to 50 ° C. in advance and supplied at a discharge rate of 100 liters per minute. Must. Conventionally, the heating of groundwater or the like in a boiler has been performed by combustion of heavy oil, city gas, waste material, or the like, or by electric heating (electric storage tower boiler using nighttime electric power).

[0003] Among these heating means, heavy oil having a large calorific value per unit time is the most excellent as a means for efficiently raising the temperature of groundwater or the like while maintaining a large discharge amount. It costs twice as much as gas and will be banned after two years. Further, in the case of heating by electricity, the amount of current used is limited, and it is difficult to constantly supply a large amount of hot water.

In order to solve these problems, the applicant of the present invention has already developed a flowing water heating apparatus shown in FIG. 5 (Japanese Patent Application No. 2000-180670). The flowing water heating apparatus has a box body 10 having a plurality of high-temperature air outlets 10a protruding from a surface thereof and connected to a pipe 5 to which high-temperature air is supplied, and a relaxed without tension on the surface of the box body 10. And a heated air blowing device 2 including a gas permeable high heat resistant sheet 11 fixed around the high temperature air blowing port 10a is provided with a supply pipe 6 for supplying groundwater and the like and a discharge pipe for discharging hot water. An air supply device 3 which is housed inside the heating tank 1 provided with
The apparatus includes a high-frequency induction heating device for heating a metal object housed in a pipe 5 extending from the air supply device 3 to the heated air blowing device 2. The heating section is connected to a ceramic tube 13 in the middle of a pipe 5 extending from the air supply device 3 to the heated air blowing device 2, and a work of the high-frequency induction heating device in which a band-shaped plate is spirally wound around the outside thereof. The coil 4 is arranged, and a tube 14 made of a heat-resistant magnetic material coated with ceramic is accommodated in a ceramic tube 13. 8 is a drain pipe for draining water, 9
Denotes an electromagnetic valve, and 12 denotes a fixing pin for fixing the gas permeable high heat resistant sheet 11.

[0005]

In the flowing water heating apparatus shown in FIG. 5, the pipe 14 constituting the heating section is made of the ceramic pipe 1.
3, the tube 14 did not rise to a sufficient temperature, and the heating efficiency of the supplied air was not satisfactory. The high-temperature air outlet 10a of the box 10
Since the water supplied to the inside of the heating tank 1 is heated by the high-temperature air blown out from the tank, the heating efficiency is not sufficient.

SUMMARY OF THE INVENTION An object of the present invention is to provide a flowing water heating apparatus which can heat groundwater and the like at a low cost while maintaining a large discharge amount of hot water and has high thermal efficiency.

[0007]

According to the present invention, there is provided a flowing water heating apparatus in which a plurality of holes 31a are provided, and a heating plate 31 in which a perforated cap 32 is fixed upward in each of the holes 31a. Air supply unit 22 and upper running water storage unit 23
A heating tank 21, an air supply device 24, a pipe 25 connected between the heated air supply unit 22 and the blower 24 and having an air heating unit 26 in the middle thereof,
7, the heating plate 31 and the perforated cap 32 are made of metal having good thermal conductivity and corrosion resistance, and a plurality of outlets 33a are tangentially arranged at positions covering the pipe opening of the heating air supply unit 22. An open swirling flow generating cap 33 is fixed, and the air heating unit 26 is housed with a ceramic tube 41, an iron tube 42 provided in close contact with the inside thereof, and a gap inside the tube. And a work coil 44 wound around the outer periphery of the ceramic tube 41 and connected to the high-frequency oscillator 27.

Further, a wire brush 34 for cleaning the perforated cap 32 is provided.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A flowing water heating apparatus according to the present invention will be described with reference to FIGS.

In this flowing water heating device, a heated air supply unit 22 is provided at a lower part, and a flowing water storage unit 23 which receives flowing water is provided at an upper part.
Tank 21 provided with an air supply device (blower) 2
4 and a pipe 2 connected between a heated air supply unit 22 of a heating tank 21 and a blower 24 and having an air heating unit 26 in the middle.
5 and a high-frequency oscillator 27 for heating the air heating section 26 of the pipe 25.

In practice, a plurality of heating tanks 21 are connected in series as shown in FIG. For example, groundwater or the like (15 ° C.) temporarily stored in a water storage tank 28 is supplied to the running water storage unit 23 of the heating tank 21 at the uppermost stream. In addition, each heated tank 21 has heated water (50
° C) is connected to a discharge pipe 29.
The end of each discharge pipe 29 faces the running water storage section 23 of the heating tank 21 on the downstream side. However, the last discharge pipe 29 faces the hot water storage tank 30.

Heating air supply unit 22 constituting heating tank 21
The flowing water storage section 23 is partitioned by a heating plate 31 made of a metal having high thermal conductivity (good thermal conductivity), such as stainless steel, aluminum, and copper, and having corrosion resistance. Also,
A pipe 25 for supplying heating air to the heating air supply unit 22 is connected to the bottom of the heating tank 21.

The heating plate 31 is, for example, a square plate having a side of 40 cm, and as shown in FIG. 3 (2), a plurality of (for example, 720) holes 31a do not overlap with those in an adjacent row. So that they are alternately arranged and perforated. Each hole 3
As shown in FIG. 2A, a small perforated cap 32 having a length of about 20 mm is fixed to 1a. Hole 31a,
The reason why the perforated caps 32 are alternately arranged is to make water flow in a meandering manner so that the perforated caps 32 are sufficiently in contact with each other to increase the heat exchange efficiency. The length (height) of the perforated cap 32 protruding into the flowing water storage part 23 is sufficiently larger than the depth of the water flowing through the flowing water storage part 23, and is, for example, 20 mm.

The perforated cap 32 is made of a metal having good thermal conductivity and corrosion resistance, similar to the heating plate 31. The upper part is narrowed by protruding inward and has a small hole 32 having a diameter of about 1 mm at the center.
a is open. The lower portion is a thin portion 32b, the outer diameter of which is slightly larger than the inner diameter of the hole 31a of the heating plate 31. The perforated cap 32 is fixed to the heating plate 31 by pressing the thin portion 32b into the hole 31a and then caulking. Although water leakage can be prevented by this fixing method, it is preferable that silver wax be welded around the base of the perforated cap 32 to the heating plate 31 in case of emergency.

At the position covering the opening of the pipe 25 of the heating air supply unit 22, a plurality of outlets 33 shown in FIG.
A swirling flow generating cap 33 having an opening a in the tangential direction is fixed. The swirl flow generating cap 33 is connected to the pipe 25
By rotating the heated air blown out from the opening portion and reaching every corner of the heated air supply section 22, the perforated cap 32 is uniformly heated. Its work is
When the swirl flow generating cap 33 is not provided, only the limited perforated caps 32 immediately above and around the opening of the pipe 25 are heated, and the others are at a low temperature.

As shown in FIG. 3A, a plurality of heating plates 31 are provided in one heating tank 21 and are integrated, and a heating air supply corresponding to each heating plate 31 is provided. Part 2
2 are provided, each of which is provided with a perforated cap 32 and a pipe 25. FIG. 1 is for explaining the principle, and a heating plate 31, a perforated cap 32,
Only one set of piping 25 is shown.

A perforated cap 32 is provided above the heating tank 21.
There is provided a wire brush 34 for cleaning the scale attached to the wire. The wire brush 34 has a rotating movement shaft 3
5 are planted all around. The rotary movement shaft 35 is inserted through a slit provided horizontally on the opposite wall of the heating tank 21, and a pinion (small gear) 36 is fixed to each end protruding from the heating tank 21. ing. One end of the rotary movement shaft 35 is fixed to and integrated with the rotation shaft of the motor 37. In addition, 45 is a pulley for driving the rotary moving shaft 35 with a wire brush of the downstream heating tank 21.

On the other hand, a rack 38 with teeth which engages with the pinion 36 is fixed below the heating tank 21 along the outer slit of the opposite wall.
Also, on the outer wall portion on which the motor 37 is mounted,
A motor sliding plate 39 that slides without rotating the motor 37 is fixed. Therefore, even if the rotating shaft of the motor 37 rotates, it does not rotate. Then, as the rotation shaft of the motor 37 rotates, the rotation movement shaft 35 moves horizontally along the slit while rotating together with the pinion 36 meshing with the rack 38. During that time, the surface of all perforated caps 32 is polished by a wire brush 34 to remove scale. This operation is managed by a computer so as to be automatically performed once a day, for example.

The air supply device 24 has a pressure of 1.5 atm to 3.0 atm.
It can deliver air at atmospheric pressure, and commercially available three-layer AC 200 V rotary compressors, turbo-type blowers and the like are used.

The air heating section 26 is screwed in the middle of the pipe 25 by connecting members 40 at both ends, and comprises a ceramic tube 41 and an iron tube 42 provided in close contact with the inside thereof. An iron end constricted pipe 43 housed with a gap inside and narrowed at both ends and a pipe-shaped work coil 44 wound around the outer periphery of the ceramic pipe 41 and through which cooling water flows. And more.

The high frequency work coil 44 is connected to the high frequency oscillator 27. Work coil 44 and high frequency oscillator 2
Reference numeral 7 denotes a high-frequency induction heating device. When an alternating current flows through the work coil 44, an alternating magnetic flux is generated, which causes a metal object to be heated (the iron tube 42 in the present invention) in the work coil 44 to be heated. Penetrate to induce very dense eddy currents. At that time, Joule heat is generated on the surface of the object to be heated. The high frequency induction heating device utilizes the heat. The work coil 44 is not limited to a pipe-shaped one, and may be a strip-shaped plate wound spirally.
The high-frequency oscillator 27 has a three-layer AC of 200 V.

In the above-described air heating unit 26, the iron tube 42 generates heat by the work coil 44, and the end narrowed tube 43 is heated by the radiant heat. Since the end constricted tube 43 is housed with a gap in the tube 42 that is generating heat, the temperature is sufficiently raised. Therefore, the air passing inside and around the end constricted tube 43 is 700 ° C.
Heat to ~ 900 ° C.

In this flowing water heating apparatus, usually 15 °
1.67 liters of groundwater per second (100 minutes per minute)
Liter) and supplied to the flowing water storage section 23 of the heating tank 21. According to the result of the experiment, the temperature of the air sent from the air supply device 24 to the heated air supply unit 22 of the heating tank 21 from the pipe 25 via the air heating unit 26 reaches 700 ° C. It was blown out as a swirling flow. The high-temperature air heats the heating plate 31 and heats the perforated caps 32 in the process of blowing upward, and the 14 ° C. water flowing in contact with the high-temperature heating plate 31 and the perforated cap 32 is heated to 60 ° C. The temperature was raised to ° C and discharged. The time required during that time is 60 seconds.

The running water heating apparatus of the present invention can heat a large amount of running water in a short time and very efficiently, compared to a conventional apparatus that heats with heavy oil, city gas, waste material, or electricity. The utility value for baths is extremely high.
It is also attractive that the cost is 1/10 or less of heavy oil. The heating temperature of groundwater or the like can be adjusted by adjusting the output of the air supply device 24, the output of the high-frequency oscillator 27, and the number of the heating tanks 21 arranged in parallel.

[0025]

As described above, the flowing water heating apparatus of the present invention can efficiently discharge groundwater while maintaining a large amount of hot water discharge without using heavy oil subject to exhaust gas regulations.
It became possible to heat at low cost. Its cost is less than 1/10 of heavy oil. In addition, a heating plate with a perforated cap separates the heating air supply section and the running water storage section of the heating tank, and the swirling flow generation cap is fixed at a position covering the pipe opening of the heating air supply section, and the air heating section To
With a ceramic tube and an iron tube densely placed inside,
It consists of an iron pipe housed inside with a gap inside and a work coil wound around the outer circumference of the ceramic pipe body. The efficiency and the heating efficiency of flowing water can be significantly improved.

[Brief description of the drawings]

FIG. 1 is an overall sectional view illustrating the principle of a flowing water heating apparatus according to the present invention.

FIG. 2 is a view of parts of a flowing water heating device of the present invention;
(1) is a sectional view of a perforated cap, and (2) is a perspective view of a swirling flow generating cap.

FIGS. 3A and 3B are diagrams of a heating plate constituting the flowing water heating device of the present invention, wherein FIG. 3A is a view for explaining an arrangement state of the heating plate in an actual flowing water heating device, and FIG. FIG. 5 is a view for explaining an arrangement state of the swirling flow generating caps.

FIG. 4 is a view for explaining an arrangement state of a heating tank in an actual flowing water heating apparatus of the present invention.

FIG. 5 is an overall cross-sectional view for explaining the principle of a previously developed flowing water heating apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 21 Heating tank 22 Heated air supply part 23 Running water storage part 24 Air supply device 25 Piping 26 Air heating part 27 High frequency oscillator 31 Heating plate 32 Perforated cap 33 Swirling flow generation cap 41 Ceramic pipe body 42 Iron pipe body 43 Iron pipe Body (end stenosis tube) 44 Work coil

Claims (2)

[Claims] A plurality of holes 31a are provided, and each of the holes 31a is divided into a lower heating air supply section 22 and an upper running water storage section 23 by a heating plate 31 having a perforated cap 32 fixed upward. Heating tank 21, air supply device 24, heated air supply unit 22
And a high-frequency oscillator 27, which is connected between the blower 24 and the air blower 24.The heating plate 31 and the perforated cap 32 are made of a metal having good heat conductivity and corrosion resistance. And a swirling flow generating cap 3 having a plurality of outlets 33a opened in a tangential direction at positions covering the pipe openings of the heated air supply unit 22.
3 is fixed, the air heating unit 26 is a ceramic tube 41, an iron tube 42 provided in close contact with the inside thereof,
A flowing water heating device comprising an iron tube 43 housed inside with a gap therebetween, and a work coil 44 wound around the outer periphery of the ceramic tube 41 and connected to the high frequency oscillator 27. 2. The flowing water heating apparatus according to claim 1, further comprising a wire brush for cleaning the perforated cap.