KR102662830B1 - Hot water supply system for district heating - Google Patents

Abstract

The present invention exchanges heat between the hot water from the main hot water supply and the water in the household hot water pipe connected to the faucet in the household, so that hot water flows through the household hot water pipe at all times, so that when hot water is used in the household, the hot water in the household hot water pipe circulates within the household. It relates to a hot water supply system for district heating that is immediately supplied through a faucet, including a main hot water pipe that supplies hot water produced by the hot water supply means to households in the building; a main hot water pipe that circulates hot water in the main hot water pipe and returns it to the hot water supply means; a household hot water pipe connected to the main hot water pipe and a faucet within the household, and supplying hot water from the main hot water pipe to the faucet; And a household circulation pipe connected to the household hot water pipe and forming a closed loop with the household hot water pipe to circulate water in the household hot water pipe within the household;
The main hot water supply pipe includes a hot water supply pipe connected to the household hot water pipe; and a hot water return pipe branched from the hot water supply pipe and connected to the main hot water pipe, and returning some of the hot water of the hot water supply pipe to the main hot water pipe.
It further includes a heat exchanger that exchanges heat with the water in the household circulation pipe and the hot water in the hot water return pipe to increase the temperature of the water in the household circulation pipe.

Description

Hot water supply system for district heating}

The present invention exchanges heat with the water in the household hot water pipe connected to the faucet in the household with the hot water in the main hot water pipe circulating within the building, thereby allowing hot water to always flow in the household hot water pipe, so that when hot water is used in the household, the hot water in the household hot water pipe is It is about a hot water system for district heating that is supplied immediately through a faucet.

The methods of supplying hot water in district heating and individual heating are different, but in both methods, when using hot water through a faucet in the kitchen or bathroom within a household, hot water does not come out immediately, but after a certain amount of cold water remaining in the household hot water pipe is discharged. The hot water comes out in a way that causes the hot water to not be used immediately, and there is a problem in that a small amount of cold water is thrown away until the hot water comes out.

In addition, since cold water is discarded until hot water comes out through the faucet, not only is water wasted, but the hot water supply bill also increases. In particular, when the length of the hot water pipe is long, there is a problem in that the hot water supply bill increases further.

Republic of Korea Patent Publication No. 10-1040693

The present invention is intended to solve the problems of the conventional hot water supply system as described above, by converting the water in the household hot water pipe into hot water by heat exchange with the hot water in the main hot water pipe, and allowing the hot water to circulate within the household through the household circulation pipe. , When a household uses hot water through a faucet, before the hot water from the main hot water pipe reaches the faucet, the hot water from the household hot water pipe is immediately supplied to the faucet, and a certain amount of hot water from the main hot water pipe reaches the faucet. The main purpose is to provide a hot water supply system that eliminates the need to throw away cold water, thereby solving waste of water and time.

In addition, in the present invention, one end of the household circulation pipe and one end of the hot water return pipe are respectively connected to the previous household circulation pipe and the main hot water supply pipe so that they reach the hot water meter, and as a result, the hot water in the household circulation pipe discharged from the heat exchanger becomes hot water. It moves to the household hot water pipe without going through the meter, and the hot water in the main hot water pipe branches off into the hot water return pipe and moves to the heat exchanger before moving to the hot water meter, so when heat is exchanged between the household circulation pipe and the hot water return pipe, the hot water meter does not operate. Another purpose is to provide a hot water supply system that can save additional charges for hot water use.

The hot water supply system for district heating of the present invention is intended to achieve the above object, and includes a main hot water pipe that supplies hot water produced by the hot water supply means to households in the building;

a main hot water pipe that circulates hot water in the main hot water pipe and returns it to the hot water supply means; and

It includes a household hot water pipe connected to the main hot water pipe and a faucet in the household, and supplying hot water from the main hot water pipe to the faucet,

The household hot water pipe includes a household circulation pipe that forms a closed loop so that water inside can circulate within the household,

The main hot water supply pipe includes a hot water supply pipe connected to the household hot water pipe; and a hot water return pipe branched from the hot water supply pipe and connected to the main hot water pipe, and returning some of the hot water of the hot water supply pipe to the main hot water pipe.

It further includes a heat exchanger that exchanges heat with the water in the household circulation pipe and the hot water in the hot water return pipe to increase the temperature of the water in the household circulation pipe,

The water in the household circulation pipe exchanges heat with the hot water in the hot water return pipe in the heat exchanger to become hot water, and then circulates along the household hot water pipe,

When a faucet for hot water use within a household operates, before the hot water from the main hot water pipe reaches the faucet through the hot water supply pipe, the hot water from the household hot water pipe is first supplied to the faucet, allowing immediate use of hot water. It is characterized by

In addition, the present invention includes a hot water meter provided between the household hot water pipe and the hot water supply pipe, and measuring the amount of hot water supplied from the main hot water pipe to the household hot water pipe,

One end of the household circulation pipe is connected to one side of the household hot water pipe before the hot water meter, and the hot water in the household circulation pipe that has exchanged heat in the heat exchanger moves to the household hot water pipe without passing through the hot water meter, and is used for hot water use within the household. When the faucet is not in operation, the hot water in the household hot water pipe circulates along the household circulation pipe without passing through the hot water meter.

The hot water supply system of the present invention is configured to make water in the household hot water pipe into hot water by heat exchange with the hot water in the main hot water pipe and circulate it within the household, so that when hot water is used through a faucet in the household, the hot water in the main hot water pipe is Since hot water from the household hot water pipe is immediately supplied to the faucet before it reaches the faucet, there is no need to discard a certain amount of cold water until hot water from the main hot water pipe reaches the faucet, solving the problems of water waste and increased water usage charges. There is a remarkable effect.

In addition, in the present invention, one end of the household circulation pipe and one end of the hot water return pipe are respectively connected to the previous household circulation pipe and the main hot water supply pipe so that they reach the hot water meter, whereby the hot water from the household circulation pipe discharged from the heat exchanger becomes hot water. It moves to the household hot water pipe without going through the meter, and the hot water in the main hot water pipe branches off into the hot water return pipe before moving to the hot water meter and moves to the heat exchanger. When heat is exchanged between the water in the household circulation pipe and the hot water in the hot water return pipe, the hot water This has the effect of saving additional charges due to hot water use because the meter does not work.

In addition, the water remaining in the household hot water pipe within the household becomes hot water by heat exchange with the hot water of the main hot water pipe in the heat exchanger, and the first rotating fan provided in the first heat exchange part of the heat exchanger heats the water flowing in from the main hot water pipe. As it rotates with hot water, the second rotating fan provided in the second heat exchange part of the heat exchanger rotates without a separate power means, which has the effect of causing hot water in the household hot water pipe to always flow within the household through the household circulation pipe.

1 is a configuration diagram showing the overall flow of the hot water supply system according to the present invention.
Figure 2 is a front view, side view, and rear view of the heat exchanger showing the inside of the first heat exchange part and the inside of the second heat exchange part of the heat exchanger applied to the present invention.
Figure 3 is a schematic diagram of the hot water circulation device of the present invention
Figure 4 is a configuration diagram showing the overall flow of a hot water supply system for district heating using a hot water circulation device.

The examples to be described below are intended to explain the invention in detail so that a person skilled in the art can easily carry out the invention, and this does not limit the technical idea and scope of the present invention. doesn't mean

In addition, the size or shape of the components shown in the drawings may be exaggerated for clarity and convenience of explanation, and terms specifically defined in consideration of the configuration and operation of the present invention may vary depending on the intention or custom of the user or operator. It should be noted that definitions of these terms must be made based on the content throughout this specification.

Hereinafter, a preferred embodiment of the hot water supply system for district heating according to the present invention will be described in detail with reference to the attached drawings.

Figure 1 is a configuration diagram showing a preferred embodiment of a hot water supply system for district heating according to the present invention, Figure 2 is a schematic diagram showing the inside of a heat exchanger applied to the present invention from the front and back, and Figure 3 is a schematic diagram of the present invention. It is a schematic diagram of a hot water supply circulation device, and Figure 4 is a configuration diagram showing the overall flow of a hot water supply system for district heating using a hot water supply circulation device.

As shown in Figure 1, the hot water supply system for district heating of the present invention includes a hot water supply means (not shown) such as a heating boiler that produces hot water in an apartment building, such as an apartment; A main hot water pipe (10) connected to the hot water supply means to supply hot water to households, and a main hot water pipe (11) for recovering hot water from the main hot water pipe (10) and supplying it to the hot water supply means; and a household hot water pipe 20 that connects the main hot water pipe 10 and the faucet 1 within the household to supply hot water from the main hot water pipe 10 to the faucet 1 within the household. It may further include a main pump (not shown) that causes the hot water in the main hot water pipe 10 and the main hot water pipe 11 to circulate in circulation.

The hot water supply means is mostly installed in the machine room of an apartment or building, and receives fuel to produce high-temperature hot water. The hot water produced by the hot water supply means is distributed within the apartment along the main hot water supply pipe (10) by the main pump. Move and circulate. And hot water from the main hot water pipe (10) is supplied to households through the hot water supply pipe (12) connected to the household hot water pipe (20) provided in each household.

The hot water supply pipe 12 branches off from the main hot water pipe 10 and is connected to the household hot water pipe 20.

The main hot water pipe (10) and the main hot water pipe (11) may be provided in a closed loop form from the underground machine room of the apartment to the rooftop, and the hot water inside is connected to the main hot water pipe (10) and the main hot water pipe by the pressure of the main pump. It moves and circulates along the hot water pipe (11), and the hot water in the main hot water pipe (10) is supplied to the household hot water pipe (20) through the hot water supply pipe (12).

A hot water meter 30 is provided between the main hot water pipe 10 and each hot water supply pipe 12 to measure the amount of hot water supplied from the main hot water pipe 10 to the household hot water pipe 20, and the hot water supply pipe (12) is provided with a pressure reducing valve (V) that controls and supplies hot water supplied from the main hot water supply pipe (10) to the household hot water pipe (20) at a constant pressure.

When the faucet (1) is turned on to use hot water in the bathroom or kitchen of a unit in an apartment or other apartment complex, the hot water moving from the main hot water supply pipe (10) to the hot water supply pipe (12) is released by the pressure reducing valve (V). After passing through the hot water meter 30 at a certain pressure, it is supplied to the household hot water pipe 20 at a constant pressure, and is then supplied to the corresponding faucet 1 connected to the household hot water pipe 20. In other words, the pressure reducing valve (V) has the effect of controlling the hot water supplied at different pressures for each floor in a building such as an apartment to a constant pressure and supplying it to each household.

The pressure reducing valve (V) may be installed between the hot water return pipe 13 and the hot water meter 30 before the hot water return pipe 13 branches from the hot water supply pipe 12 or after the hot water return pipe 13 branches. .

Therefore, when the faucet (1) is operated in the hot water use mode to use hot water within the household, the hot water from the main hot water pipe (10) flows through the hot water supply pipe (12) into the household hot water of the household in which the faucet (1) is operated. The amount of hot water supplied to the pipe 20 and from the main hot water pipe 10 to the household hot water pipe 20 is measured through the hot water meter 30.

Meanwhile, the household hot water pipe 20 includes a household circulation pipe 21 that forms the household hot water pipe 20 in a closed loop shape so that the water inside can circulate and move within the household.

And the main hot water pipe 10 is branched from the hot water supply pipe 12 and connected to the main hot water pipe 11, and some of the hot water supplied from the hot water supply pipe 12 to the household hot water pipe 20 is transferred to the main hot water pipe. It includes a hot water return pipe (13) returning to (11).

And the present invention includes a heat exchanger (40) that exchanges heat between the water in the household circulation pipe (21) and the hot water in the hot water return pipe (13) to increase the temperature of the water in the household circulation pipe (21).

The household circulation pipe 21 allows the water in the household hot water pipe 20 to circulate within the household. One side of the household hot water pipe 20 connected to the faucet 1 in the household and the hot water supply pipe 12 ) is connected to the other side of the household hot water pipe 20, forming a ring or closed loop shape with the household hot water pipe 20, and the water of the household hot water pipe 20 flowing in through one end passes through the inside. By allowing it to flow back into the household hot water pipe 20 through the other end, the water inside the household hot water pipe 20 can circulate within the household. At this time, the other end of the household circulation pipe 21 is connected to the other side of the household hot water pipe 20 before the hot water meter 30, so that it circulates within the household through the household hot water pipe 20 and the household circulation pipe 21. Since the water does not pass through the hot water meter 30, it is not measured by the hot water meter 30.

The household circulation pipe 21 may be installed within the household, and the hot water meter 30 may be installed outside the household.

Meanwhile, the heat exchanger 40 exchanges heat with the cold water remaining in the household hot water pipe 20 with the hot water flowing in the main hot water pipe 10, and causes hot water to flow in the household hot water pipe 20, thereby circulating the household hot water pipe 20. The water in the pipe 21 exchanges heat with the hot water in the hot water return pipe 13 to raise the hot water to a certain temperature, and as a result, the hot water supplied from the household circulation pipe 21 flows in the household hot water pipe 20.

The heat exchanger 40 may be provided inside a housing 50a of a predetermined volume to which the hot water supply pipe 12, the hot water return pipe 13, the household hot water pipe 20, and the household circulation pipe 21 can be connected. and may be provided inside the housing (50a) together with the hot water meter (30) and/or the pressure reducing valve (V).

According to the present invention, when the faucet (1) is operated to use hot water in the household, the cold water remaining in the household hot water pipe (20) reaches the faucet (1) when the hot water supplied from the main hot water pipe (10) reaches the faucet (1). This is to solve the problem of water being wasted due to draining to The water in 21) exchanges heat with the hot water in the main hot water pipe 10 by the heat exchanger 40 to become hot water, and then is supplied to the household hot water pipe 20, so that hot water always remains and circulates in the household hot water pipe 20. As a result, when the faucet (1) is operated to use hot water in the household, hot water from the household hot water pipe (20) is immediately supplied to the faucet (1) at the beginning of the operation of the faucet (1) without wasting water and time. There is a remarkable effect of being able to use hot water immediately within the household.

Therefore, hot water whose temperature has been raised by heat exchange with the hot water of the main hot water pipe 10 flows through the household hot water pipe 20, and when it is desired to use hot water through the faucet 1 within the household, the household hot water pipe 20 By immediately supplying the hot water flowing to the faucet (1), hot water can be used immediately without having to wait for the hot water from the main hot water pipe (10) to reach the faucet (1) through the household hot water pipe (20). .

The amount of water in the household hot water pipe 20 is not large, and can move and circulate along the household hot water pipe 20 and the household circulation pipe 21 within the household by the second rotating fan 42d, which will be described later. will be.

The heat exchanger (40) is connected to the household circulation pipe (21) and the hot water return pipe (13), and while the hot water in the main hot water pipe (10) moves by the operation of the main pump, some of it flows into the hot water supply pipe (12). After flowing in, it branches off into the hot water return pipe (13), and the hot water in the hot water return pipe (13) exchanges heat with the water in the household circulation pipe (21) in the heat exchanger (40) and then returns to the main return pipe (11). .

Therefore, in the present invention, the household hot water pipe 20 is provided with a household circulation pipe 21 that allows internal water to circulate within the household, and the main hot water supply pipe 10 is a hot water supply pipe connected to the household circulation pipe 20. (12) and a hot water return pipe (13) that allows part of the hot water in the hot water supply pipe (12) to return to the main circulation pipe (11) through the heat exchanger (40), and the water in the household circulation pipe (21) is provided. It moves to the household hot water pipe (20) through the heat exchanger (40), and the hot water in the hot water return pipe (13) returns to the main return pipe (11) through the heat exchanger (40), and the household circulation pipe (21) The water exchanges heat with the hot water in the hot water return pipe 13 in the heat exchanger 40 and then moves to the household hot water pipe 20, so that when the faucet 1 for use of hot water in the household is operated, the main hot water pipe ( There is a notable effect that hot water from the household hot water pipe 20 is discharged before the hot water from 10) reaches the faucet 1 within the household, allowing immediate use of hot water.

In addition, in the present invention, one end of the household circulation pipe 21 and one end of the hot water return pipe 13 are connected to the household hot water pipe 20 and the hot water supply pipe 12 outside the hot water meter 30, respectively. As a result, the hot water in the household circulation pipe 21, which has been heat exchanged in the heat exchanger 40, moves to the household hot water pipe 20 without passing through the hot water meter 30, and the hot water in the hot water supply pipe 12 is transferred to the hot water meter 30. ) before moving to the hot water return pipe (13) and moving to the heat exchanger (40). As a result, when heat is exchanged between the household circulation pipe (21) and the hot water return pipe (13), the hot water meter (30) does not operate. This has the effect of saving additional charges for hot water use.

Next, Figure 2 shows the inside of the heat exchanger used in the present invention and the direction of movement of water flowing inside the heat exchanger. Figure 2 (A) shows the inside of the second heat exchanger disposed on the back of the heat exchanger and the movement of water. It shows the direction, Figure 2 (B) shows the inside seen from the side of the heat exchanger, and Figure 2 (C) shows the inside of the first heat exchanger disposed in the front of the heat exchanger and the direction of water movement. It was done.

The heat exchanger 40 of the present invention has a first inlet 41a through which the hot water of the hot water return pipe 13 flows and a first outlet 41c through which the hot water inside is discharged to return to the main hot water pipe 10. is formed, and a first heat exchange pipe (41b) is provided inside to connect the first inlet (41a) and the first outlet (41c), and after flowing into the first inlet (41a), the first heat exchange pipe (41b) is provided. A first heat exchange unit (41) provided with a first rotating fan (41d) that rotates with the hot water moving along and moves the hot water in the first heat exchange tube (41b) toward the first outlet (41c); And a second inlet (42a) disposed on one side of the first heat exchange unit (41) through which water from the household circulation pipe (21) flows, and the water flows through the household circulation pipe (21) to the household hot water pipe (20). A second outlet (42c) is formed to discharge in the opposite direction, and a second heat exchange pipe (42b) connecting the second inlet (42a) and the second outlet (42c) corresponds to the first heat exchange pipe (41b). It is provided so that the water flowing into the second inlet (42a) moves along the second heat exchange pipe (42b) and exchanges heat with the hot water of the first heat exchange unit (41), and is rotated by the first rotating fan (41d). It includes a second heat exchange unit (42) provided with a second rotating fan (42d) that moves the water in the second heat exchange tube (42b) toward the first outlet (41c).

The heat exchanger 40 includes a first heat exchange unit 41 through which hot water from the hot water return pipe 13 passes and a second heat exchange unit 42 through which water (circulating water) from the household circulation pipe 21 passes. The hot water in the hot water return pipe 13 passing through the first heat exchange unit 41 and the water (circulating water) in the household circulation pipe 21 passing through the second heat exchange unit 42 exchange heat to form the second heat exchanger 41. The temperature of the water in the household circulation pipe 21 that has passed through the heat exchange unit 42 increases, and this causes hot water to flow inside the household hot water pipe 20.

The first heat exchange unit 41 is connected to the hot water return pipe 13, and as shown in FIG. 2 (C), hot water from the hot water return pipe 13 flows into one side of the lower part (on the drawing). A first inlet 41a is formed, a first heat exchange pipe 41b through which the hot water moves is provided inside, and a first outlet 41c through which the hot water is discharged to the outside is provided on the other side of the lower part (on the drawing). is formed.

The first heat exchange pipe (41b) may be provided in a zigzag, concentric circle, maze, or wrinkle shape from the first inlet (41a) to the first outlet (41c) inside the first heat exchange unit (41). As a result, the movement time of hot water inside the first heat exchange unit 41 increases, which has the effect of increasing the heat exchange time.

And the first heat exchange tube 41b is provided with a first rotating fan 41d whose blades rotate in one direction due to the pressure of the hot water flowing into the first heat exchange unit 41, and the hot water rotates in the first rotation. As the fan 41d rotates, it moves smoothly from the first inlet 41a through the first heat exchange pipe 41b to the first outlet 41c without flowing back.

That is, according to the operation of the main pump provided in the main hot water pipe 10, the hot water produced in the hot water facility moves and circulates along the main hot water pipe 10 and the main return pipe 11, and the hot water flows through the hot water supply pipe ( 12) and then flows into the first heat exchange unit 41 through the hot water return pipe 13 branching from the hot water supply pipe 12, and the first rotating fan 41d rotates due to the pressure of the hot water, As a result, the hot water in the first heat exchange unit 41 moves to the first outlet 41c along the first heat exchange pipe 41b and then returns to the main circulation pipe 11.

In addition, a second heat exchange part 42 formed to correspond to the first heat exchange part 41 is provided on one surface of the first heat exchange part 41.

The second heat exchange unit 42 is provided at one side of the upper part (on the drawing) with a second inlet 42a through which water from the household circulation pipe 21 flows, as shown in (A) of FIG. 2, The second outlet 42c through which the water is discharged is formed on the other side of the upper part, and a second heat exchange pipe 42b is provided inside to connect the second inlet 42a to the second outlet 42c.

The second heat exchange tube 42b is formed to correspond to the shape and/or length of the first heat exchange tube 41b and may be provided symmetrically or overlapping with the first heat exchange tube 41b. ) On one side of the first rotating fan (41d) is a second rotating fan ( 42d) is prepared.

The first inlet 41a and the first outlet 41c of the first heat exchange part 41 are formed on one side and the other side of the lower part of the first heat exchange part 41, respectively, and the second heat exchange part 42 The second inlet 42a and the second outlet 42c are formed on one side and the other side of the upper part of the second heat exchange part 42, respectively, and are formed by the pressure of hot water moving in the first heat exchange pipe 41b. The first rotating fan (41d) rotates, which causes the second rotating fan (42d) to rotate, and the water flowing into the second heat exchanger (42) through the second inlet (42a) flows into the second rotating fan (42d). By rotating 42d), it moves from the second inlet 42a to the second outlet 42c.

The first rotating fan (41d) and the second rotating fan (42d) may be connected to one rotating shaft, and the rotating shaft is rotated by the rotation of the first rotating fan (41d), so that the second rotating fan (42d) can be rotated

In addition, the first rotating fan (41d) and the second rotating fan (42d) may be designed to rotate while engaging with gears using gears, etc., and the rotation speed and/or direction of rotation can be adjusted by varying the size or radius. It could be designed differently. And since the amount of water remaining in the generation circulation pipe 21 is not large, a large force is not required to rotate the second rotating fan 42d, and it can be easily rotated even with a small force.

In addition, the first rotating fan (41d) may be formed in the form of a side-flow fan having a water outlet pipe on one side, in which case the hot water of the first heat exchange pipe (41b) flows into the side between the blades provided inside, It may be designed to rotate the blade in one direction and then exit back to the first heat exchange pipe (41b) through a water outlet pipe connected to the first heat exchange pipe (41b) inside the rotating fan. And as the first rotating fan (41d) rotates, the rotating shaft rotates so that the second rotating fan (42d) rotates along the rotating shaft without a separate power means.

In addition, the second rotating fan (42d) may be designed in the same side flow fan form as the first rotating fan (41d), and a water intake pipe is formed on one side of the second rotating fan (42d), and a household circulation pipe (21) ) of water (circulating water) flows into the second rotating fan (42d) through the water intake pipe, rotating the blades of the second rotating fan (42d) in one direction, and then rotating the blades on the side inside the rotating fan. It may be designed to exit back to the second heat exchange pipe (42b).

The first rotating fan (41d) and the second rotating fan (42d) are installed inside the heat exchanger 40 to circulate hot water in the household hot water pipe 20 and the household circulation pipe 21, and the heat exchanger ( 40) can be installed separately.

Since the present invention is a belt, the first rotating fan (41d) is rotated by the pressure of the hot water circulating in the main hot water pipe (10), and this causes the second rotating fan (42d) to be connected to the first rotating fan (41d). By rotating without a separate power source, the water in the household hot water pipe 20 circulates smoothly within the household.

Meanwhile, the hot water supply system for district heating of the present invention can be easily and quickly implemented using a hot water circulation device. Figure 3 is a schematic diagram of the hot water circulation device, and Figure 4 is a configuration diagram of a hot water supply system for district heating using a hot water circulation device.

The hot water circulation device 50 includes a housing 50a having a space therein; It is provided inside the housing (50a), and connects the hot water supply pipe (12) (or main hot water pipe (10)) and the household hot water pipe (20) to transfer hot water from the main hot water pipe (10) to the household hot water pipe (20). A first connecting pipe (51) that supplies; A heat exchanger 40 provided inside the housing 50a; One side is connected to one side of the first connection pipe 51 connected to the main hot water supply pipe 10 or the hot water supply pipe 12 inside the housing 50a and the heat exchanger 40, and the other side is connected to the heat exchanger 40. It is connected to the machine (40) and the main hot water supply pipe (10), and some of the hot water flowing from the main hot water pipe (10) or the hot water supply pipe (12) to the first connection pipe (51) is branched to the heat exchanger (40). a second connection pipe (52) that returns the hot water that has passed through the heat exchanger (40) to the main hot water supply pipe (10); And one side is connected to the heat exchanger 40 and the other side of the first connector 51 connected to the household hot water pipe 20 inside the housing 50a, and the other side is connected to the heat exchanger 40 and the household hot water pipe 20. It is connected to the circulation pipe 21, and moves the water in the household circulation pipe 21 to the heat exchanger 40 to exchange heat with the hot water passing through the heat exchanger 40 through the second connection pipe 52, thereby converting the water into hot water. It includes a third connection pipe (53) that supplies the hot water to the household hot water pipe (10) after being raised.

And the hot water circulation device 50 is provided in the first connection pipe 51 and is disposed between the connection portions of the second connection pipe 52 and the third connection pipe 53 in the first connection pipe 51. It may further include a hot water meter 30 that measures the amount of hot water supplied from the main hot water supply pipe 10 to the household circulation pipe 20. Additionally, a pressure reducing valve (V) may be provided at the rear of the hot water meter (30) in the first connection pipe (51).

The hot water supply circulator 50 may exclude the pressure reducing valve (V), and may be provided by manufacturing the hot water meter 30 and the heat exchanger 40 in an integrated form.

And the heat exchanger 40 flows into the interior through the first inlet 41a and the second connection pipe 52, where one side of the second connection pipe 52 branching from the first connection pipe 51 is connected. The first outlet (41c), which discharges the hot water into the main hot water supply pipe (10), is connected to the first heat exchange pipe (41b), and flows into the first inlet (41a) by the pressure of the main pump, and then flows into the first heat exchange pipe (41b). A first heat exchange unit (41) provided with a first rotating fan (41d) that rotates with hot water moving along (41b) to move the hot water in the first heat exchange tube (41b) toward the first outlet (41c); And a second inlet (42a) disposed on one side of the first heat exchange unit (41) and through which water flows from the third connection pipe (53) connected to the household circulation pipe (21), and a third connection pipe ( The second outlet (42c), which discharges to the first connection pipe (51) connected to the household hot water pipe (20) through 53), is connected to the second heat exchange pipe (42b), and flows into the second inlet (42a). As the water moves along the second heat exchange tube (42b), it exchanges heat with the hot water of the first heat exchange unit (41), and is rotated by the first rotating fan (41d) to remove water from the second heat exchange tube (42b). 1. It includes a second heat exchange unit (42) provided with a second rotating fan (42d) moving in the direction of the outlet (41c).

Therefore, the hot water circulation device 50 of the present invention can be easily and simply connected and installed to the main hot water pipe 10, the main hot water pipe 11, the household hot water pipe 20, and the household circulation pipe 21, and can provide hot water. A meter 30 is included to measure the amount of hot water used in the household, which has the effect of immediately supplying hot water to the household.

Although the present invention has been described in relation to the above-mentioned preferred embodiments, a person skilled in the art will easily recognize that various modifications and variations are possible without departing from the gist and scope of the invention. It is obvious that all such changes and modifications fall within the scope of the attached claims.

1: Faucet 10: Main hot water pipe
11: main hot water pipe 12: hot water supply pipe
13: hot water return pipe 20: household hot water pipe
21: household circulation pipe 30: hot water meter
40: heat exchanger 41: first heat exchange unit
41a: first inlet 41b: first heat exchange pipe
41c: first outlet 41d: first rotating fan
42: second heat exchanger 42a: second inlet
42b: second heat exchange tube 42c: second outlet
42d: second rotating fan

Claims (5)

A main hot water pipe (10) that supplies hot water produced by the hot water supply means to households in the building; a main hot water pipe (11) that circulates the hot water in the main hot water pipe (10) and returns it to the hot water supply means; And a household hot water pipe (20) connected to the main hot water pipe (10) and the faucet (1) in the household, and supplying hot water from the main hot water pipe (10) to the faucet (1),
The household hot water pipe 20 includes a household circulation pipe 21 that forms a closed loop so that the water inside can circulate within the household,
The main hot water pipe 10 includes a hot water supply pipe 12 connected to the household hot water pipe 20; And a hot water return pipe (13) branched from the hot water supply pipe (12) and connected to the main hot water pipe (11), and returning some of the hot water of the hot water supply pipe (12) to the main hot water pipe (11).
A heat exchanger (40) that exchanges heat between the water in the household circulation pipe (21) and the hot water in the hot water return pipe (13) to increase the temperature of the water in the household circulation pipe (21); And in the hot water supply pipe 12, it is provided between the hot water meter 30 and the hot water return pipe 13 provided between the household hot water pipe 20 and the hot water supply pipe 12, and is connected to the main hot water pipe 10 for household use. It includes a pressure reducing valve (V) that controls the pressure of the hot water so that the hot water supplied to the hot water pipe 20 is supplied at a constant pressure,
The water in the household circulation pipe (21) exchanges heat with the hot water in the hot water return pipe (13) by the heat exchanger (40) to become hot water, and then circulates along the household hot water pipe (20),
When the faucet (1) for using hot water in a household is operated, at the beginning of operation of the faucet (1), hot water from the household hot water pipe (20) is supplied to the faucet (1), and then the main hot water pipe (10) A hot water supply system for district heating, characterized in that hot water is supplied to the faucet (1) so that hot water can be used immediately.
According to paragraph 1,
One end of the household circulation pipe (21) is connected to one side of the household hot water pipe (20) before the hot water meter (30), and the hot water in the household circulation pipe (21) heat-exchanged in the heat exchanger (40) is connected to the hot water meter (30). A hot water supply system for district heating, characterized in that it moves to the household hot water pipe (20) without passing through.
According to paragraph 1,
The heat exchanger 40 is,
A first inlet (41a) through which hot water flows into the hot water return pipe (13) and a first outlet (41c) through which the hot water is discharged to the main hot water pipe (10) are formed, and a first inlet (41a) and a first outlet (41c) are formed inside the hot water return pipe (13). 1 A first heat exchange pipe (41b) is provided connecting the outlet (41c), and is rotated by the pressure of hot water flowing into the first inlet (41a) and moving along the first heat exchange pipe (41b) to purify the hot water. 1 A first heat exchange unit (41) provided with a first rotating fan (41d) moving in the direction of the outlet (41c); and
A second inlet (42a) disposed on one side of the first heat exchange unit (41) through which water from the household circulation pipe (21) flows, and a second outlet (42c) through which the water is discharged toward the household hot water pipe (20). is formed, and a second heat exchange pipe (42b) is provided inside, connecting the second inlet (42a) and the second outlet (42c), and is rotated by the first rotating fan (41d) to form a second heat exchange pipe (42b). A second rotating fan (42d) is provided to move the water in 42b) toward the first outlet (41c), and the water flowing into the second inlet (42a) moves along the second heat exchange pipe (42b) to the first outlet (41c). A hot water supply system for district heating, comprising a second heat exchange unit (42) that exchanges heat with the hot water of the heat exchange unit (41).
According to paragraph 3,
The first inlet (41a) and the first outlet (41c) of the first heat exchange unit (41) face the second inlet (42a) and the second outlet (42c) of the second heat exchange unit (42) in a diagonal direction, respectively. It is arranged so that the hot water in the first heat exchange pipe (41b) and the water in the second heat exchange pipe (42b) move in opposite directions to exchange heat and are then discharged through the first outlet (41c) and the second outlet (42c). A hot water supply system for district heating, characterized in that. delete