JPH10205885A - Water heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the waste of energy and utilize reserved high-temperature hot-water effectively by a method wherein the operating pressure of a relief valve for a water heating boiler body of water supplying side is set so as to be lower than that of a release valve for the water heating boiler body of got-water supplying side, which is connected to the release valve of the former. SOLUTION: Two sets of water heating boiler bodies 11a, 11b are connected in series in a water heating device 20 and a relief valve 31, whose operating pressure is set at 0.95kg f/cm<2> , is attached to the upper part of the water heating boiler body 11a at water supplying side. On the other hand, another relief valve 31b, whose operating pressure is set at 0.97kg f/cm<2> , higher than that of the relief valve 31a, is attached to the upper part of the water heating boiler body 11b at hot-water supplying side. In this case, branched drainage pipes 32a, 32b and a drainage pipe 33 are connected to the relief valves 31a, 31b to drain expanded water relieved from respective water heating boiler bodies 11a, 11b, to the outside of the water heating device 20. According to this method, the waste of energy is eliminated and high-temperature reserved hot-water can be utilized effectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water heater, and more particularly, to a water heater in which a plurality of hot water cans are connected in series and horizontally.

[0002]

2. Description of the Related Art Generally, a hot water supply device supplies tap water to the inside of a cylindrical hot water can body, and heats the water supply of the hot water can body with a heater to supply hot water to an open mouth or a bathroom, etc. for use. It is.

[0003] The hot water can of such a hot water device is usually
In the case where one hot water can is used and the hot water storage capacity is 460 liters, the diameter is about 580 mmφ.

[0004] Therefore, when this hot water can is insulated with a heat insulating material and housed in a rectangular outer case, the floor area of the hot water device becomes 6 floors.
It becomes as large as about 50 to 700 mm x 650 to 700 mm.

On the other hand, there is a tendency to build a house as large as possible in a small area from the viewpoint of effective use of land. Therefore, there is a conflicting demand for reducing the occupied area of the hot water device provided in the house while maintaining the same hot water storage capacity.

As shown in FIGS. 9 and 10, two or a plurality of hot water cans 11a, 11b... Having a diameter of 440 mm are connected side by side in series and connected as shown in FIGS. .., Etc., without increasing the outer diameter of the hot water cans 11a, 11b..., Etc., and these hot water cans 11a, 11b.
What is stored in is used.

As shown in FIG. 9, the piping structure of the water heater 10 supplies water from a water supply unit such as a tap to a hot water can 11 a on the water supply side via a pressure reducing valve 13 and a check valve 14. Are supplied to the hot water can body 11b on the hot water supply side via a connecting pipe 15 connecting the water in series, and these water supplies are supplied to the heaters 16a, 16b.
To control the heating individually or simultaneously and store hot water. A hot water supply port 17 such as a faucet is provided on a hot water can 11b of the hot water device 10, so that hot water can be taken out and used.

The hot water cans 11a, 1
Above the upper part of 1b, relief valves 18a, 18b, etc., which normally release the expansion water having the same operating pressure, are attached, and the hot water cans 11a, 11b caused by the expansion of the hot water cans 11a, 11b due to the heating of the stored water are removed. I try to protect the pressure.

The schematic structure of the water heater 10 is shown in FIG.
As shown in FIG. 0, three support legs 19a are provided on the outer peripheral portion of the lower portion of the hot water can bodies 11a, 11b, etc. at an interval of about 120 degrees.
19b, 19c, 19aa, 19bb, 19cc, etc. are attached, and these are attached to the anchor of the foundation so as not to collapse.

[0010]

The water heater 10 constructed as described above has a slightly increased length in the lateral direction, but has a reduced width in the front-rear direction. Can be effectively reduced.

However, since the operating pressures of the relief valves 18a and 18b are the same, one of the relief valves operates first when the expansion water is released, and in some cases, the relief valve on the water supply side. 18a is operated, and in some cases, the relief valve 18b on the hot water supply side is operated.

Therefore, the operation of the relief valves 18a and 18b may not be specified.

In this operation, the relief valve 18a on the water supply side is used.
If the heater operates first, the low-temperature hot water is discarded, and the loss of energy by the heater 16a can be reduced. On the other hand, if the hot water supply side relief valve 18b operates first, the high-temperature hot water is discarded. In some cases, the warm water heated by the heater 16a is discarded, and there is a problem that energy is wasted very much.

Further, since each of the hot water can bodies 11a, 11b, etc. is fixed to the foundation by three support legs 13a ..., 13aa ..., the fixing operation can be performed relatively easily. Since the number of water supply pipes, connecting pipes or wirings of the bodies 11a, 11b, etc. is larger than that of one hot water can body, it is very troublesome to perform these in the gaps between the support legs 13a ... and 13aa ... There is a problem that accompanies.

Further, a large number of support legs 13a.
In order to embed the anchor fittings to attach aa ... to the foundation, there is a problem that considerably high-precision adjustment is required to maintain the horizontality and the mutual gap, and it takes a lot of trouble to perform these operations.

The present invention has been made in view of such a point, and in order to identify the operation of the relief valve, the operation of the relief valve is always operated first from the relief valve close to the water supply side to eliminate waste of energy. It is an object of the present invention to provide a hot water device that can effectively use high-temperature hot water storage.

It is another object of the present invention to provide a water heater that facilitates work such as piping by minimizing the number of supporting legs.

[0018]

According to a first aspect of the present invention, there is provided a water heater in which a plurality of hot water cans are connected in series, and the operating pressure of a relief valve of the hot water can on the water supply side is connected to the hot water supply side connected thereto. An object of the present invention is to provide a hot water apparatus characterized in that the operating pressure is set lower than the operating pressure of the relief valve of the hot water can body.

Further, according to the present invention, the outer periphery of each of the hot water can on the water supply side and the hot water can on the hot water supply side is approximately 12 mm.
A first support leg, a second support leg, and a third support leg are provided at an angle of 0 degree, and the hot water can body on the water supply side and the hot water can body on the hot water supply side are connected side by side in series and connected. The first support leg is located at the center of the front of each hot water can body, the second support leg is located at the rear outside of one side of the hot water can body, and the third support leg is located at the hot water can body And removing the second and third support legs inside the rear portion of each of the hot water can bodies, and removing the second support leg portion and the third support leg portion from each other. And a connection fitting for fixing each of the hot water can bodies.

Further, according to a third aspect of the present invention, the first supporting leg has an angle of approximately 120 degrees around the outer periphery of each of the hot water can on the water supply side, the intermediate hot water can and the hot water can on the hot water supply side. A second support leg and a third support leg are provided, and the hot water can body on the water supply side, the intermediate hot water can body, and the hot water can body on the hot water supply side are connected side by side in series and connected, and the first support leg is provided. Is located at the center of the front of each hot water can, the second support leg is positioned outside the rear of one side of the hot water can, and the third support leg is the rear of the other side of the hot water can. The second support leg and the third support leg are located on the outside of the rear side of each of the hot water can bodies, and the hot water cans are added to the second support leg portion and the third support leg portion. An object of the present invention is to provide a water heating device provided with a connection fitting for fixing a body.

[0021]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a water heater according to an embodiment of the present invention.

Since the water heater 20 of the present invention is basically similar to the conventional water heater 10, the same parts are denoted by the same reference numerals and will not be described in detail.

First, two hot water cans 11a and 11b connected in series to a hot water device 20 of the present invention will be described with reference to FIGS.

A first support leg 21a is attached to the front center of the lower portion of the hot water can 11a. The first support leg 21a extends obliquely upward and to the right outside the rear portion of one side. The second support legs 21b are attached at an interval of about 120 degrees counterclockwise from the second support leg 21b. These support legs 21a, 21b are placed on anchors 23a, 23b embedded in the foundation 22, and are fixed thereto by bolts 24.

A first support leg 21aa is attached to the front central portion of the lower portion of the hot water can 11b. The first support leg 21aa extends obliquely to the upper left of the rear outside of the other side. The third support leg 21cc is attached at an interval of approximately 120 degrees clockwise from 21aa. These support legs 21aa, 21cc are placed on anchors 23aa, 23cc embedded in the base 22, and are fixed thereto by bolts 24.

A water supply pipe 25 is connected to a lower portion of the hot water can 11a via a pressure reducing valve 13 and a check valve 14, and receives water from a water supply section. The upper portion of the hot water can 11a is connected to a water supply pipe 27 below the hot water can 11b via a connecting pipe 26 so as to receive water from the hot water can 11a. A hot water supply pipe 29 is connected to an upper portion of the hot water can 11b via a connection pipe 28, and the hot water can 11b
Is configured to take out the heated hot water from the hot water supply port 30.

A relief valve 31a whose operating pressure Pa is set to 0.95 kgf / cm2 is attached to the upper part of the hot water can 11a on the water supply side, and a relief valve 31a is mounted on the upper part of the hot water can 11b on the hot water supply side. High operating pressure Pb, ie 0.9
A relief valve 31b set at 7 kgf / cm @ 2 is mounted to release the expansion water from the respective hot water cans 11a and 11b.

Branch discharge pipes 32a, 32b and a water distribution pipe 33 are connected to these relief valves 31a, 31b, so that the expansion water released by the respective hot water cans 11a, 11b is drained outside the hot water apparatus 20. I have.

A holding plate 34 is attached around the water supply pipe section and the hot water supply pipe section above the hot water cans 11a and 11b.
A connecting bracket 35 is attached to a portion of the inside of each of the hot water cans 11a and 11b where the second support leg and the third support leg are to be attached.
1b is fixedly supported.

As shown in FIG. 2, the connecting bracket 35 extends obliquely upward and to the left inside the rear portion of the hot water can 11a.
Clockwise and the second support leg 21b from the first support leg 21a.
And a triangular metal fitting 35a fixed by welding at intervals of 120 degrees in a counterclockwise direction, and extends diagonally upward and rightward inside the rear portion of the hot water can 11b, and extends counterclockwise from the first support leg 21aa. A flat metal member 35f is applied to a triangular metal member 35b fixed by welding at intervals of 120 degrees clockwise from the third support leg 21cc and fixed by screws 36.

An anchor 23 embedded in the base 22
, 23aa, etc., and the supporting legs 21a, 21aa, etc. of the hot water cans 11a, 11b are fixed on the upper portions of the anchor fittings 23a, 23aa, etc., as shown in FIGS. The legs 21a..., 21aa... Are placed, and the legs 21a.

A relief operation for releasing expansion water due to overpressure in each of the hot water can bodies 11a and 11b of the hot water device 20 thus configured will be described.

The hot water device 20 in which the hot water can 11a on the water supply side and the hot water can 11b on the hot water supply side are connected in series and connected to each other can be boiled when the water cans 11a and 11b are simultaneously boiled or individually. May be raised.

In the case of boiling simultaneously, each hot water can 11
When the water stored in the hot water can 11a on the water supply side is in the water state but the hot water remains in the water stored in the hot water can 11b on the hot water supply side. There are times when it is boiled.

In each of these states, the heaters 16a, 16b
The case of boiling while controlling the temperature will be described.

First, the case where water is stored in each of the hot water cans 11a and 11b generated only at the beginning of operation will be described with reference to FIG.

The heater 16a of each hot water can 11a, 11b
, 16b at the same time, and each hot water can 11a, 11b
And boil water at the same time. Due to the rise in temperature, the stored water expands sequentially due to the rise in temperature, and each hot water can 11
The internal pressures of a and 11b are simultaneously and equally increased.

When the rising pressure becomes 0.95 kgf / cm2 or more, the relief valve 31a on the water supply side is operated, and the hot water can 11
The expanded water a is discharged from the branch drainage pipe 32a and the water distribution pipe 33.

The expanded water and the like in the hot water can 11b are discharged from the branch drainage pipe 32a and the water distribution pipe 33 from below through the water supply pipe 27 and the connecting pipe 26.

Therefore, since the hot water can 11a discharges expanded water and the like from the upper part and the hot water can 11b from the lower part in the same expanded state, there is not much energy saving effect.

However, this state is a phenomenon that occurs only at the beginning of operation, and does not cause a major problem in energy saving.

Next, referring to FIG. 6, the water stored in the hot water can 11a on the water supply side which is generated in almost all usage modes is water, and the hot water A remains in a part (for example, about half) of the water stored in the hot water can 11b on the hot water supply side. Will be described.

The heater 16a of each hot water can 11a, 11b
, 16b at the same time, and each hot water can 11a, 11b
When the stored water is heated at the same time, since all the stored water in the hot water can 11a on the water supply side is water as shown in FIG. 7, the boiling temperature rises over a relatively long time in accordance with the gradual temperature rise characteristic Ta. go.

On the other hand, the water stored in the hot water can 11b on the hot water supply side has a rapid temperature rise characteristic Tb while convection and mixing about half of the low temperature water and about half of the high temperature water A of the hot water can 11b. In a relatively short time.

The hot water can 11a on the water supply side and the hot water can 1 on the hot water supply side correspond to the rise in the water storage temperature due to the boiling.
The 1b reservoir expands. When the internal pressure of one of the hot water cans 11a and 11b becomes 0.95 kgf / cm2 or more due to the expansion, the relief valve 31a on the water supply side operates. By this operation, the expansion water or the like of the hot water can 11a or the hot water can 11b is supplied to the branch drain 32a, the water distribution pipe 33a, or the water supply pipe 2.
7. Discharge from the connecting pipe 26, the branch drain pipe 32a, and the water distribution pipe 33.

When the water in the hot water can 11b is further boiled and expanded, the set pressure is low and the low-temperature expansion water at the lower part of the hot water can 11b is fed to the relief valve 31a which operates before the relief valve 31b. Then, the water is transferred to the hot water can 11a via the connecting pipe 26 and discharged through the branch water pipe 32a and the water pipe 33.

Further, when the water stored in the hot water can 11b expands and the internal pressure becomes 0.97 kgf / cm2 or more, the relief valve 31b on the hot water supply side is operated, and the expansion water or the like is often released from the relief valve 31b. Prevents overpressure only by operating the relief valve 31a.

Therefore, the expansion water or the like released by the relief valve 31a is heated at the upper portion of the hot water can 11a during the boiling or the lower portion of the hot water can 11b, in particular, the water supply pipe 27 and the connecting pipe 26.
The hot water supply inside the hot water can 11b is not escaped.

Therefore, the hot water device 20 can prevent wasteful energy loss.

Further, a case where each of the hot water cans 11a and 11b is individually heated and heated will be described.

Such boiling is usually performed by energizing the heater 16b of the hot water can 11b on the hot water supply side. When the internal pressure of the hot water can 11b rises due to the boiling heating, the relief valve 31a of the hot water can 11a on the water supply side operates first, and the hot water in the lower part of the hot water can 11b is supplied from the relief valve 31a to the water supply pipe. 27, a branch water distribution pipe 32a through a connecting pipe 26, etc.
, And discharged through a water pipe 33.

Therefore, the water heater 20 can prevent wasteful energy loss.

The hot water cans 11a, 1
1b, in each of which two hot water bodies 11a,
If the support legs 21c and 21bb attached to the inside of 11b are reduced by one, the center of gravity of each of the hot water cans 11a and 11b tends to work down toward the support legs 21c and 21bb. In order to prevent this, these support legs 21c, 21bb
The part where there was is fixed by the connection fitting 35. Therefore, the portions where the support legs 21c and 22bb were located are firmly fixed, so that their collapse can be prevented.

In addition, these hot water cans 11a, 11
Since there are fewer supporting legs in the lower part of b, work such as piping and wiring can be facilitated.

Such a small number of supporting legs 21a..., 21aa
The hot water cans 11a and 11b are fixedly supported by means such as...

In this embodiment, two hot water cans 11a,
11b are connected in series, but as shown in FIG. 8, for example, three hot water cans, namely, a hot water can 11a on the water supply side, an intermediate hot water can 11b, and a hot water can 11c on the hot water supply side are connected and fixed in series. You may make it. Such a hot water can 11a,
11b, 11c, ie, the first support leg 21a
, 21aa, and 21aaa are arranged on the front surface, one support leg 21b is positioned outside the rear of the hot water can 11a, and the other support leg 21ccc is positioned outside the rear of the hot water can 11c. Second support leg 21 inside the rear of each hot water can
bb, 21bbb and the third support leg 21c,
If the portions where 21 cc existed are removed and these portions are connected and fixed to each other by connecting metal fittings 35ab and 35bc, the collapse can be prevented by the movement of the center of gravity.

The hot water cans 11a, 11b, 11
If the three relief valves attached to c (all not shown) are always set at a lower pressure on the water supply side than the pressure on the middle hot water can and the pressure on the hot water supply side, The relief valve on the water supply side always operates first, so that energy loss due to discharge of hot water on the hot water supply side can be prevented.

With such a configuration, even when a large number of hot water cans are connected in series, the same operation can be performed by the same configuration.

[0059]

According to the first aspect of the present invention, there is provided a water heater in which a plurality of hot water can bodies are connected in series, and the operating pressure of a relief valve of the hot water can body on the water supply side is connected to the hot water can water body on the hot water supply side. Since the operating pressure of the relief valve is set to be lower than that of the relief valve, the relief valve can be operated while always minimizing the energy loss in the use state.

Further, according to the present invention, the outer periphery of each of the hot water can on the water supply side and the hot water can on the hot water supply side is substantially 12
A first support leg, a second support leg, and a third support leg are provided at an angle of 0 degree, and the hot water can body on the water supply side and the hot water can body on the hot water supply side are connected side by side in series and connected. The first support leg is located at the center of the front of each hot water can body, the second support leg is located at the rear outside of one side of the hot water can body, and the third support leg is located at the hot water can body And removing the second and third support legs inside the rear portion of each of the hot water can bodies, and removing the second support leg portion and the third support leg portion from each other. Since the connecting metal fittings for fixing each of the hot water cans are provided, the number of supporting legs can be reduced, and the piping and wiring work performed under the hot water cans can be facilitated.

Further, according to the third aspect of the present invention, the first supporting legs have an angle of approximately 120 degrees around the respective outer peripheral portions of the hot water can on the water supply side, the intermediate hot water can and the hot water can on the hot water supply side. A second support leg and a third support leg are provided, and the hot water can body on the water supply side, the intermediate hot water can body, and the hot water can body on the hot water supply side are connected side by side in series and connected, and the first support leg is provided. Is located at the center of the front of each hot water can, the second support leg is positioned outside the rear of one side of the hot water can, and the third support leg is the rear of the other side of the hot water can. The second support leg and the third support leg are located on the outside of the rear side of each of the hot water can bodies, and the hot water cans are added to the second support leg portion and the third support leg portion. Since the connecting bracket for fixing the body is provided, the number of supporting legs is reduced, and piping and wiring work performed at the bottom of these hot water cans It is possible to facilitate.

[Brief description of the drawings]

FIG. 1 is a front view showing an outline of a water heater according to the present invention.

FIG. 2 is a plan view showing a main part of FIG. 1;

FIG. 3 is a cross-sectional view showing a partially enlarged anchor fitting of the water heater of the present invention.

FIG. 4 is a sectional view taken along the line IV-IV in FIG. 3 and viewed in the direction of the arrow;

FIG. 5 is an explanatory diagram showing the operation of the hot water device of the present invention.

FIG. 6 is an explanatory view showing another operation of the hot water device of the present invention.

FIG. 7 is an explanatory diagram showing operation characteristics of the hot water device of the present invention.

FIG. 8 is a plan view showing another embodiment of the hot water device of the present invention.

FIG. 9 is an explanatory view showing a piping structure of a conventional hot water device.

FIG. 10 is a plan view showing an arrangement configuration of a conventional hot water device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Hot water apparatus 11a, 11b Hot water body 12 Outer case 13 Pressure reducing valve 14 Check valve 15 Connecting pipe 16a, 16b Heater 17 Hot water supply port 18a, 18b Relief valve 19a, 19b ..., 19aa, 19bb ... Support leg 20 Hot water apparatus 21a, 21b ..., 21aa, 21bb ... Support leg 22 Foundation 23a, 23b ..., 23aa, 23bb ... Anchor fitting 24 Bolt 25 Water supply pipe 26 Connection pipe 27 Water supply pipe 28 Connection pipe 29 Hot water supply pipe 30 Hot water supply port 31a, 31b Relief valve 32a, 32b Branch drainage pipe 33 Water distribution pipe 34 Holding plate 35 Connecting bracket

Claims (3)

[Claims] 1. A hot water device in which a plurality of hot water cans are connected in series, wherein the operating pressure of a relief valve of the hot water can on the water supply side is lower than the operating pressure of the relief valve of the hot water can on the hot water supply connected thereto. A hot water device, which is set. 2. A first supporting leg, a second supporting leg, and a third supporting leg are provided at approximately 120 degrees on the outer peripheral portions of the hot water can body on the water supply side and the hot water can body on the hot water supply side. The hot water cans on the water supply side and the hot water cans on the hot water supply side are connected side by side in series, and the first support legs are positioned at the center of the front surface of each of the hot water cans. The second support legs Is located on the rear outside of one side of the hot water can body, the third support leg is located on the rear outside of the other side of the hot water can body, and the second support leg on the rear inside of each hot water can body And a third support leg is removed, and a connection fitting for fixing each of the hot water cans is provided at the second support leg portion and the third support leg portion. 3. The first supporting leg, the second supporting leg, and the second supporting leg at an angle of about 120 degrees around respective outer peripheral portions of the hot water can body on the water supply side, the intermediate hot water can body, and the hot water can body on the hot water supply side. 3
The hot water cans on the water supply side, the intermediate hot water can and the hot water cans on the hot water supply side are connected side by side in series, and the first support legs are connected to the front center of each hot water can. The second support leg is positioned outside the rear portion of one side of the hot water can body; the third support leg is positioned outside the rear portion of the other side of the hot water can body; The second support leg and the third support leg at the rear inner side of the can body are removed, and connecting metal fittings for fixing the respective hot water can bodies are provided at the second support leg portion and the third support leg portion. A water heater characterized by the following.