JPH02115627A - Hot water supplying system - Google Patents

Abstract

PURPOSE:To set the using conditions of both conduits to the same and to simplify the control system of a heater by connecting a first closed loop conduit to a second closed loop conduit independently of the heater without interface to each other. CONSTITUTION:A first Closed loop conduit 10 having a feed main tube 2, a return main tube 3 and a pump 4 for circulating hot water and a second closed loop conduit 20 having a feed main tube 12, a return main tube 13 and a pump 14 are connected to a heater 1 mounted in the lowermost stage of a multistoried building. The conduit 10 is mounted between a reference level L0 and a first set level L1 higher by pressure head H than the level L0, and the head H corresponds to the pressure resistant strength of a hot water supplying load 6. The load 6 of each floor is connected to a branch tube 5 connected between the tubes 3. The conduit 20 is mounted between the level L0 and a second set level L2 higher by the head H than the level L1, and the load 6 of each floor is connected to a branch tubs 15 connected between the tubes 13. A common heater is used for the conduits 10, 20 to reduce the number of the heaters to be mounted, and its control can be simplified.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to a hot water supply system for buildings having a large number of living rooms, such as condominiums such as Manhattan, hotels, general buildings, etc., and is particularly effective for high-rise buildings. Regarding hot water supply systems.

[Conventional technology]

To obtain various types of hot water for kitchens, bathrooms, etc. in the buildings mentioned above, there is a method of installing a small-capacity heater in each room, but for boat fishing, a large-capacity heater common to each room is used. A central hot water supply system is used in which hot water is obtained by a heater and then supplied to each room.

In one of these central hot water systems, a heater is connected to a closed loop line consisting of a main feed pipe and a main return pipe, a pump is installed in this closed loop line to circulate hot water, and a branch pipe is connected to the main feed pipe. There is a system in which the hot water is led to each room, and hot water is obtained directly from a branch pipe in each room (first method).

On the other hand, in the case of the above-mentioned hot water system, hot water is discharged and consumed from branch pipes, so water (usually tap water) must be replenished into the circulation pipe each time, which causes various problems. As disclosed in 1982-1.409, a branch pipe leading to each room was connected between the main sending pipe and the main return pipe, and a heat exchanger with water for hot water supply was installed in this branch pipe. (Second method).

[Problem to be solved by the invention]

However, in recent years, buildings have become taller, and as a result, the first. In both cases of the second method, appliances such as faucets, valves, meters, and heat exchangers, that is, hot water supply loads, are required to have high pressure resistance, which inevitably increases installation costs. .

For this reason, conventionally, for example, as shown in FIG. 2, a heat exchanger 40 is provided at the boundary between the lower and upper floors of a building, and a main feed pipe connected to the heater 31 and the heat exchanger 40 is installed in the lower floors. A first closed loop pipe 50 consisting of a main feed pipe 42 and a main return pipe 33 is installed in the upper part, and a second closed loop pipe 6 consisting of a main feed pipe 42 and a main return pipe 43 connected to a heat exchanger 40 is installed in the upper part.
Set 0.

There is one in which the pressure resistance of the hot water supply load 36.46 connected to the branch pipe 35.45 is of a normal size. 34°44 indicates a circulation pump.

However, in this case, although the high-rise area is heated by the same heater 31 as the low-rise area, it is heated via the heat exchanger 40, so the heating conditions are different from the low-rise area. In order to make the same (load response, period, etc.), the control system for the heater 31 becomes complicated, resulting in a problem of high cost.

It is an object of the present invention to solve the above-mentioned conventional problems and to provide a hot water supply system with a simple control system and low installation cost.

[Means to solve the problem]

The technical means according to the invention for achieving the above object comprises a heater, a closed loop line connected to the heater, and a pump for circulating heating liquid in the closed loop line.

In a hot water supply system for a high-rise building that connects branch pipes that lead to the hot water supply load on each floor, the closed loop pipe is provided between a reference level and a first set level higher than the reference level, and a first closed loop pipe line having a pressure head; a second closed loop pipe line provided between the reference level and a second set level higher than the first set level and having a pressure head less than or equal to a predetermined level at the first set level; between the reference level and the first set level in the first closed loop pipe, the branch pipe leading to each hot water supply load is comprised of at least two pipes of
and is provided between the first setting level and the second setting level in the second closed loop conduit.

Furthermore, this invention has the following features: 1. It is characterized in that the second closed loop conduit is connected to the same heater.

[For production]

In the above technical means, the predetermined value of the pressure head corresponds to the pressure resistance of the hot water supply load to be used.

Therefore, the first. The second setting level may be appropriately set according to the pressure resistance of the hot water supply load to be used.

According to the above technical means, 1. Since the second closed loop line is connected independently to the heater, the operating conditions can be the same whether the heaters are separate or the same, and the heater control system is therefore simple. Just something is enough.

〔Example〕

An embodiment shown in the drawings will be described below.

As shown in FIG. 1, 1 is a heater installed, for example, on the lowest floor of a high-rise building, and this heater 1 is supplied with a main pipe 2,
A first closed loop line 10 having a main return pipe 3 and a pump 4 for circulating hot water is connected to a second closed loop line 20 which similarly has a main feed pipe 12, a main return pipe 13 and a pump 14.

The heater 1 includes a can body 21, and an inverted U-shaped combustion gas passage 22 is formed within the can body 21. The liquid 23 contained in the can body 21 is heated by the combustion gas in the flow path 22, and this heated liquid 23 and the first and second closed loop pipes 10
．． Heat is exchanged with the liquid in the tubes 20 through pressure-resistant coils 24 and 25 provided at the lower ends of these conduits. 26 is a combustion burner, 27 is an atmosphere open pipe, 2
8 is a make-up water tank. High-temperature steam may be passed through the flow path 22 instead of combustion gas.

In FIG. 1, Lo is the reference level, Li, L.

is the first. Indicates the second setting level, which is substantially Lo.

The space between L□ can be considered as a low-rise part, and the space between LiL2 can be considered as a high-rise part.

The first closed loop pipe line 10 is installed between a reference level L and a first set level L higher than the reference level L by a pressure head H, and the pressure head H corresponds to the pressure resistance of the hot water supply load 6. The hot water supply load 6 on each floor is generated by a branch pipe 5 connected between the main feed pipe 2 and the main return pipe 3 between levels L and L1.
It is connected to the.

The second closed loop pipe 20 has a reference level L and a second set level L which is higher than the first set level L1 by a pressure head H.
2, and the hot water supply load 16 on each floor is level L□
, L2 is connected to a branch pipe 15 connected between the main feed pipe 12 and the main return pipe 13.

Although two closed loop pipes 10.20 are shown in the above embodiment, three or more closed loop pipes may be used, taking into consideration the height of the building and the heat supply load to be used.

Although the heater 1 may be provided individually for each closed loop pipe,
By using a common heater for the closed loop conduit 10, 20 as shown, the number of heaters installed can be reduced and the control thereof can be simplified.

Further, in the above embodiment, the present invention is applied to the second method in which the hot water in the closed loop pipe 10.20 is not discharged to the outside of the system, but the present invention can also be applied to the first method in which the hot water is consumed outside the system. .

〔Effect of the invention〕

This invention is as described above, and according to the invention described in claim 1. Since the second closed loop pipes are connected independently to the heater without interference from each other, the operating conditions for both pipes can be the same, and the control system for the heater is therefore simple. , and the installation cost can be reduced.

According to the invention set forth in claim 2, the number of heaters installed can be reduced, and the control system can be further simplified.

[Brief explanation of the drawing]

FIG. 1 is a schematic system diagram showing an embodiment of the present invention;
FIG. 2 is a schematic system diagram showing a conventional example. 1... Heater 2, 12... Main feed pipe 3
．． 13... Return main pipe 4, 14... Pump 5
．． 15... Branch pipe 10... First closed loop pipe line 6.16... Heat supply load 20... Second closed loop pipe line

Claims (1)

[Claims] 1. It has a heater (1) and a closed-loop pipe connected to the heater (1), and a pump for circulating heated liquid is provided in the closed-loop pipe. In a hot water supply system for a high-rise building in which a branch pipe connected to a hot water supply load is connected, the closed loop pipe is provided between a reference level (L_0) and a first set level (L_1) higher than the reference level, and A first closed loop pipe (10) having a pressure head below a predetermined value at (L_0) and a second set level (L_0) higher than the reference level (L_0) and the first set level (L_1).
L_2) and the first setting level (L_1)
The branch pipes (5) (15) lead to each hot water supply load (6) (16) are connected to the first
Between the reference level (L_0) and the first setting level (L_1) in the closed loop pipe (10), and between the first setting level (L_1) and the second setting level (L_2) in the second loop pipe (20). ). 2. The water heating system according to claim 1, wherein the first and second closed loop pipes (10) and (20) are connected to the same heater (1).