JP2775025B2 - Water leak prevention cold and hot water piping system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water leakage prevention cold and hot water piping system for connecting a heat source device and an air conditioner by a water circulation circuit. The cold and hot water piping, which is not provided, is passed through the ceiling of the living room.

[0002]

2. Description of the Related Art In an individual air conditioning system using a water loop, heat source equipment and individual air conditioners (or fan coil units) are piped in a water circulation circuit. The water loop individual air conditioning system uses water for the transport power, so there is no need to distribute air through ducts found in central air conditioning, and there is no piping length limitation, which is a drawback of air-cooled air conditioners, and it is large. Suitable for subdivision air conditioning of buildings and office buildings. Since the air conditioning units distributed in the living room are directly disposed in places where a load is generated, a ceiling cassette type that effectively utilizes the inside of the living room ceiling is generally used.

FIG. 6 is a system diagram of a conventional cold / hot water piping system using a water loop. A cold / hot water supply pipe (CH) 3 which is a main pipe on the cold / hot water supply side and a cold / hot water return pipe (CHR) 5 which is a main pipe on the cold / hot water return side are connected to the heat source equipment 1. The return pipe 5 extends through the slab 7 and is piped to each floor. Cold and hot water outlet pipes 3 on each floor,
A cold / hot water return pipe 9 and a cold / hot water return pipe 11 which are branch pipes are connected to the cold / hot water return pipe 5, and the cold / hot water return pipe 9 and the cold / hot water return pipe 11 are piped running inside the living room ceiling 13. . On the other hand, an air conditioner (air conditioning unit) 15 of a ceiling cassette type, a fan coil unit (air conditioning unit) 17
The air conditioner 15 and the fan coil unit 17 are connected to the cold / hot water outgoing pipe 9 and the cold / hot water returning pipe 11 via the connecting outgoing pipe 19 and the connecting return pipe 21 in the living room ceiling 13. The cold / hot water outgoing pipe 9, the cold / hot water return pipe 11, the air conditioner 15, and the fan coil unit 17 are generally connected to the pipe joints 23a and 23b.
Are connected inside the living room ceiling 13.

[0004]

In recent years, electronic devices such as computers have become extremely widespread in living rooms such as office buildings, and cold and hot water pipes in the ceiling 13 of the living room have high reliability without water leakage. Is required. However, in the conventional cold / hot water piping system, the cold / hot water outgoing pipe 9 and the cold / hot water returning pipe 11 serving as branch pipes are laid sideways in the ceiling 13 of the living room. Further, the air conditioner 15 and the fan coil unit 1 are connected via the connecting outgoing pipe 19 and the connecting return pipe 21.
7, a large number of pipe connection points A and B using the pipe joints 23a and 23b are provided in the ceiling 13 of the living room, thereby increasing the number of factors that cause a water leakage accident. On the other hand, in order to prevent a water leak accident in the living room ceiling 13, there is a direct expansion type air-conditioning system in which refrigerant gas is circulated and supplied, but there is a problem that control equipment, heat insulation work and the like become expensive. The present invention has been made in view of the above circumstances, and provides a water leakage prevention cold / hot water piping system that can employ an economical cold / hot water piping system without causing water leakage. The purpose is to improve the reliability of piping.

[0005]

Means for Solving the Problems Claim 1 of the present invention
The described water leakage prevention cold / hot water piping method is a water leakage prevention cold / hot water piping method in which a cold / hot water outgoing pipe and a cold / hot water return pipe connected to a heat source device are connected to a plurality of air conditioning units distributed in the ceiling of a living room. A header branch unit provided with a forward pipe header connected to the cold / hot water forward pipe and a return pipe header connected to the cold / hot water return pipe is provided in the ceiling of the living room, and the forward pipe header, the return pipe header and Each of the air conditioning units is connected by piping to a branch outgoing pipe and a branch return pipe that are not provided with a pipe joint, and a connection between the outgoing header and the branch outgoing pipe, and a connection between the branch outgoing pipe and the air conditioning unit. The connection between the return pipe header and the branch return pipe and the connection between the branch return pipe and the air conditioning unit are integrally formed without using a pipe joint. In the water leakage prevention cold / hot water piping system according to claim 2, in the water leakage prevention cold / hot water piping system according to claim 1, a drain pipe is connected below the outgoing pipe header and the return pipe header in the header branch unit. The provision of the drain pan is a means for solving the problem.

[0006]

According to the first aspect of the present invention, the cold / hot water outgoing pipe and the cold / hot water returning pipe are collectively connected to the plurality of branch outgoing pipes and the branch returning pipe in the header branch unit. Pipes are no longer distributed in the ceiling of the room,
The number of locations that cause water leakage will be reduced. In addition, the pipe joint is not used for the branch outgoing pipe and branch return pipe running sideways on the ceiling of the living room, and the connection between the outgoing pipe header and the branch outgoing pipe, the connection between the branch outgoing pipe and the air conditioning unit, and the return pipe header and the branch. Since the connection with the return pipe and the connection between the branch return pipe and the air conditioning unit are made integrally without using a pipe joint, the number of locations that cause water leakage on the ceiling of the living room is further reduced.
According to the cold / hot water piping system for preventing water leakage according to claim 2, a drain pan is provided below the forward pipe header and the return pipe header in the header branching unit, and a portion serving as a pipe connection point in the ceiling of the living room. I.e., the connecting part between the cold / hot water outgoing pipe and the outgoing pipe header, and the connecting part between the cold / hot water returning pipe and the returning pipe header, and further, the outgoing pipe header and the branch outgoing pipe, which are integrally connected. And the connection between the return pipe header and the branch return pipe are all concentrated in the header branch unit, so even if water leaks at these connections, the drain pan It can be supplied to the drain pipe.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a water leakage prevention cold / hot water piping system according to the present invention will be described below in detail with reference to the drawings. FIG.
Fig. 2 is a schematic diagram of a cooling / heating water piping system for preventing water leakage according to the present invention, Fig. 2 is a schematic diagram of a header branch unit, Fig. 3 is a schematic diagram of a header branch unit having a control function, and Fig. 4 is a plan view of a water leakage prevention type unit. 5 is a side view of FIG. The heat source equipment 1 includes a cold / hot water forward pipe (CH) 3 serving as a main pipe and a cold / hot water return pipe (CH).
R) 5 is connected, and the cold / hot water outgoing pipe 3 and the cold / hot water return pipe 5 penetrate the slab 7 and are piped to each floor. A header branch unit 31 is connected to the cold / hot water outgoing pipe 3 and the cold / hot water return pipe 5 on each floor.
Is the shortest distance from the hot and cold water return pipe 3 and the cold and hot water return pipe 5,
Room ceiling 13 at a position where the effects of water leakage hardly occur
Is placed within.

As shown in FIG. 2, a drain pan 33 is provided in the header branch unit 31.
Is connected to a drain pipe (not shown). Above the drain pan 33, a forward pipe header 35 and a return pipe header 37 are provided. The forward pipe header 35 is connected to the cold / hot water forward pipe 3, and the return pipe header 37 is connected to the cold / hot water return pipe 5. The forward pipe header 35 and the return pipe header 37 include a plurality of branch forward pipes 39,
The branch return pipe 41 is connected, and the branch outgoing pipe 39 and the branch return pipe 41 are connected to a water leakage prevention type air conditioner (air conditioning unit) 43 and a fan coil unit (air conditioning unit) 45 distributed in the living room. I have. With such a configuration, in the header branch unit 31, a connection portion between the cold / hot water outgoing pipe 3 and the forward pipe header 35, and a connection portion between the cold / hot water return pipe 5 and the return pipe header 37, Furthermore, since the connecting portion between the outgoing pipe header 35 and the branch outgoing pipe 39 and the connecting portion between the return pipe header 37 and the branching return pipe 41 are arranged in a concentrated manner, these connecting parts should be used. Even if water leakage occurs, it can be received by the drain pan 33 and flowed to the drain pipe. Branch outgoing pipe 39,
The branch return pipe 41 is made of a seamless pipe such as a resin pipe. Further, the pipe joints 23a and 23b (see FIG. 6) are not used in a portion running horizontally in the living room ceiling 13, and furthermore, the connection between the outgoing pipe header 35 and the branch outgoing pipe 39, the branch outgoing pipe 39 and the air conditioning unit The connection with the return pipe 43 (45), the connection between the return pipe header 37 and the branch return pipe 41, and the connection between the branch return pipe 41 and the air conditioning unit 43 (45) are made integrally without using a pipe joint. Therefore, with such a configuration, in the water leakage prevention cold / hot water piping system of the present embodiment,
There are fewer places on the ceiling of the living room that cause water leakage. When the header branch unit 31 has a control function, a control device such as an electromagnetic on-off valve 47 is attached to the branch forward pipe 39 connected to the forward pipe header 35 above the drain pan 33 (see FIG. 3). .

As shown in FIGS. 4 and 5, a drain pan 49 is provided inside the water leakage prevention type air conditioner 43 and the fan coil unit 45, and the drain pan 49 is connected to a drain pipe (not shown). A cold / hot water coil 51 is provided above the drain pan 49, and the cold / hot water coil 51 is connected to the branch outgoing pipe 39 and the branch return pipe 41 above the drain pan 49. Therefore, even if a water leak occurs at the connection point between the cold / hot water coil 51 or the cold / hot water coil 51 and the branch outgoing pipe 39 and the branch return pipe 41, all the water leakage is received by the drain pan 49. . Air conditioner 4
3. An inspection port 53 is provided in the casing of the fan coil unit 45, and the inspection port 53 enables inspection of the cold / hot water coil 51 and the drain pan 49. A water circulation circuit using a water leakage prevention cold and hot water piping system is constituted mainly of the header branch unit 31, the branch outgoing pipe 39, the branch return pipe 41, and the water leakage prevention type air conditioner 43 (or the fan coil unit 45).

In the cold / hot water pipe system for preventing water leakage, the cold / hot water forward pipe 3 and the cold / hot water return pipe 5
Are collectively connected to the plurality of branch outgoing pipes 39 and the branch return pipes 41, and the pipe connection locations are not dispersed in the living room ceiling 13, so that the number of locations where water leaks are reduced. Then, even if water leaks in the header branch unit 31, all the water is received by the drain pan 33, and the water does not leak into the living room. In addition, since the pipe joint is not used for the branch outgoing pipe 39 and the branch return pipe 41 running laterally in the living room ceiling 13 and there are no pipe connection points, there is no place that causes water leakage. Furthermore, air conditioners 4 distributed in the living room
3. In the fan coil unit 45, a drain pan 49 is provided in each casing,
9. Since the connection portion with the branch return pipe 41 is disposed on the drain pan 49, even if water leaks at the cold / hot water coil 51 or at the pipe connection location, the water is supplied in the same manner as the above-described header branch unit 31. Are all received by the drain pan 49, so that no water leaks into the living room.

[0011] As described above, in the above-described water leakage prevention cold / hot water piping system, by integrating the pipe connection points, the number of the pipe connection points dispersed in the ceiling of the living room is reduced, and the pipe connection portion (the header branch unit 31) is integrated. ) And the air conditioner 43 and the like are connected by the branch outgoing pipe 39 and the branch return pipe 41 that do not use a pipe joint, so that a leak-possible portion is reliably eliminated. 43
And the like, the drain pans 33 and 49 are provided, so that even if leakage occurs in this portion, it is possible to reliably prevent leakage into the living room.

[0012]

As described above, according to the water leakage prevention cold / hot water piping system of the first aspect of the present invention, the cold / hot water outgoing pipe and the cold / hot water returning pipe are integrally formed with a plurality of branch outgoing pipes and branch returning pipes. And the piping connection points are no longer dispersed,
No pipe joint is used for the branch outgoing pipe and the branch return pipe that traverse the ceiling of the living room, and the connection between the outgoing header and the branch outgoing pipe,
The connection between the branch outgoing pipe and the air conditioning unit, the connection between the return pipe header and the branch return pipe, and the connection between the branch return pipe and the air conditioning unit are made integrally without using piping joints. There are fewer locations that can cause leakage. As a result, the reliability of the cold / hot water piping in the ceiling of the living room is improved, and an economical cold / hot water piping method can be adopted without causing water leakage. Also,
According to the cold / hot water piping system for preventing water leakage according to claim 2, a drain pan is provided below the forward pipe header and the return pipe header in the header branching unit, and a portion serving as a pipe connection point in the ceiling of the living room. I.e., the connecting part between the cold / hot water outgoing pipe and the outgoing pipe header, and the connecting part between the cold / hot water returning pipe and the returning pipe header, and further, the outgoing pipe header and the branch outgoing pipe, which are integrally connected. And the connection between the return pipe header and the branch return pipe are all concentrated in the header branch unit. This can flow to the drain pipe, and thus the reliability of the cold / hot water pipe can be further improved.

[Brief description of the drawings]

FIG. 1 is a system diagram of a cold / hot water piping system for preventing water leakage according to the present invention.

FIG. 2 is a schematic diagram of a header branch unit.

FIG. 3 is a schematic diagram of a header branch unit having a control function.

FIG. 4 is a plan view of a water leakage prevention type unit.

FIG. 5 is a side view of FIG. 4;

FIG. 6 is a system diagram of a conventional cold / hot water piping system using a water loop.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Heat-source equipment 3 Cold / hot water forward pipe 5 Cold / hot water return pipe 13 Living room ceiling 23a, 23b Pipe joint 31 Header branch unit 35 Forward pipe header 37 Return pipe header 39 Branch forward pipe 41 Branch return pipe 43 Air conditioner (air conditioning unit) 45 Fan Coil unit (air conditioning unit)

Claims (2)

(57) [Claims] 1. A water leakage prevention cold and hot water pipe system for connecting a cold and hot water outgoing pipe and a cold and hot water return pipe connected to a heat source device to a plurality of air conditioning units distributed in a ceiling of a living room, A header branch unit provided with an outgoing pipe header connected to the outgoing pipe and a return pipe header connected to the cold / hot water return pipe is provided in the ceiling of the living room, and the outgoing pipe header, the return pipe header and the individual air conditioning are provided. The unit is connected to the branch outgoing pipe and the branch return pipe, which are not provided with a pipe joint, respectively, and the connection between the outgoing header and the branch outgoing pipe, the connection between the branch outgoing pipe and the air conditioning unit,
A water leakage prevention cold and hot water piping system wherein connection between a return pipe header and a branch return pipe and connection between a branch return pipe and an air conditioning unit are made integrally without using a pipe joint. 2. The water temperature for preventing leakage according to claim 1, wherein a drain pan connected to a drain pipe is provided below the forward pipe header and the return pipe header in the header branch unit. Water piping system.