JP2702663B2 - 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. 7 is a system diagram of a conventional cold / hot water piping system using a water loop. A cold water outgoing pipe (C) 3 and a cold water returning pipe (CR) 5 are connected to the cold heat source device 1, and the cold water outgoing pipe 3 and the cold water returning pipe 5 penetrate the slab 7 and are piped to each floor. In addition, the hot water source pipe 9 (H)
1, hot water return pipe (HR) 13 is connected, hot water outgoing pipe 11,
The hot water return pipe 13 extends through the slab 7 and is piped to each floor. The cold water outgoing pipe 3a, the cold water returning pipe 5a, the hot water outgoing pipe 11a, and the hot water returning pipe 13a, which are branch pipes, are connected to the cold water outgoing pipe 3, the cold water returning pipe 5, the hot water outgoing pipe 11, and the hot water returning pipe 13 on each floor. The cold water outgoing pipe 3a, the cold water returning pipe 5a, the hot water returning pipe 11a, and the hot water returning pipe 13a are piped so as to run laterally inside the ceiling 15 of the living room.

On the other hand, a ceiling cassette type air conditioner (air conditioning unit) 17 and a fan coil unit (air conditioning unit) 19 provided with separate connection ports for cold water and hot water are provided in the ceiling 15 of the living room. The fan coil unit 19 is connected to the cold water connection pipe 21, the cold water connection return pipe 23, the hot water connection return pipe 25, and the hot water connection return pipe 27 through the cold water connection return pipe 21, the hot water connection return pipe 27, and the hot water return pipe 5 in the living room ceiling 15. 11a is connected to the hot water return pipe 13a. Cold water forward pipe 3a, cold water return pipe 5a, hot water return pipe 11a, hot water return pipe 13a and cold water connection forward pipe 21, cold water connection return pipe 23, hot water connection forward pipe 25, hot water connection return pipe 27, and cold water connection forward pipe 21 , Cold water connection return pipe 23,
The hot water connection outgoing pipe 25, the hot water connection return pipe 27, the air conditioner 17, and the fan coil unit 19 are generally connected to a pipe joint 29.
a and 29b are connected in the ceiling 15 of the living room. At the end of the distributed air conditioning units, a plurality of air conditioning units are further connected. In a so-called zone correspondence, the cold water outgoing pipe 3a and the hot water outgoing pipe 11a are integrated to form the outgoing pipe 31.
The return pipe 33 is formed by integrating the cold water return pipe 5a and the hot water return pipe 13a, and the fan coil unit 19 is connected in parallel to the forward pipe 31 and the return pipe 33. In this case, the open / close valve 35 was provided on the cold water forward pipe 3a and the hot water forward pipe 11a, and the cold / hot water was switched.

[0005]

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 15 of the living room have high reliability without water leakage. Is required. However, in the conventional cold / hot water pipe system, the cold water forward pipe 3a, the cold water return pipe 5a, the hot water forward pipe 11a, and the hot water return pipe 1 serving as branch pipes are provided in the ceiling 15 of the living room.
The cold water outgoing pipe 3a and the like are further provided with a cold water connecting outgoing pipe 21, a cold water connecting returning pipe 23, and a hot water connecting outgoing pipe 2a.
5. Since the air conditioner 17 and the fan coil unit 19 are connected through the hot water connection return pipe 27, the pipe joint 29a,
Since a large number of pipe connection points A using the 29b are provided in the ceiling 15 of the living room, the number of factors that cause a water leakage accident has been increased. On the other hand, there is a direct expansion type air-conditioning system in which refrigerant gas is circulated and supplied in order to prevent a water leak accident in the living room ceiling 15, 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.

[0006]

Means for Solving the Problems Claim 1 of the present invention
In the described water leakage prevention cold / hot water piping method, the outgoing / return pipe of the cold water system and the outgoing / return pipe of the hot water system connected to the heat source equipment are connected to a plurality of air conditioning units distributed in the ceiling of the living room. A cold water piping system that is connected to the cold water outgoing tube, a cold water return tube header connected to the cold water returning tube, a hot water outgoing tube header connected to the hot water outgoing tube, and hot water A header branch unit provided with a hot water return pipe header connected to the return pipe is provided in the ceiling of the living room, and one end of a branch outgoing pipe and a branch return pipe not provided with a pipe joint are respectively connected to the individual air conditioning units. The other end of the branch outgoing pipe is switchably connected to one of the cold water outgoing header and the hot water outgoing header via a three-way valve provided in the header branch unit, and the header branch is connected. unit The through a three-way valve provided that it has freely connected to someone one and switching between the other end cold Kaekan header and hot Kaekan header of the branch instead tube was solutions of the problems. In the water leakage prevention cold and hot water piping system according to claim 2, in the water leakage prevention cold and hot water piping system according to claim 1, the cold water outgoing pipe header, the cold water return pipe header, the hot water outgoing header, and the hot water return in the header branch unit. A means for solving the above problem is that a drain pan connected to a drain pipe is provided below the pipe header and the three-way valve. In the water leakage prevention cold / hot water piping system according to the third aspect, a plurality of air conditioners are provided in which the outgoing pipe / return pipe of the chilled water system and the outgoing pipe / return pipe of the hot water system connected to the heat source device are dispersedly arranged in the ceiling of the living room. This is a cold / hot water piping system to prevent water leakage, which is connected to the unit.A cold water return pipe header connected to the cold water return pipe, a cold water return pipe header connected to the cold water return pipe, and a hot water return pipe header connected to the hot water return pipe And a header branch unit provided with a hot water return pipe header connected to the hot water return pipe is provided in the ceiling of the living room, and one end of a branch outgoing pipe and a branch return pipe not provided with a pipe joint are individually connected to the air conditioning unit. The other end of the branch outgoing pipe is connected to the cold water return pipe header, and the other end of the branch return pipe is connected to the cold water return pipe header. Return valve on / off valve respectively A hot water return pipe header is connected to the upstream branch pipe on the upstream side via a bypass outward pipe, and a hot water return pipe header is connected to the upstream branch return pipe of the return pipe on-off valve via a bypass return pipe. Providing an outgoing pipe opening / closing valve on the outgoing pipe and providing a return pipe opening / closing valve on the bypass return pipe is a means for solving the above-mentioned problem.

[0007]

According to the first aspect of the present invention, a cold water outgoing pipe and a hot water outgoing pipe are switchably connected to a branch outgoing pipe by a three-way valve. The return pipe is connected to the branch return pipe so that it can be switched by a three-way valve, and these connections are integrated in the header branch unit.
Piping connection points are no longer dispersed in the ceiling of the living room, and the number of locations where water leakage occurs is reduced. Further, since the pipe joint is not used for the branch outgoing pipe and the branch return pipe running laterally in the ceiling of the living room, and the pipe connection point is eliminated, there is no place where water leakage is caused. According to the water leakage prevention cold / hot water piping system according to claim 2,
A drain pan is provided below the cold water outgoing pipe header, cold water return pipe header, hot water outgoing pipe header, hot water return pipe header, and three-way valve in the header branch unit, and a part that becomes a connection point of piping in the ceiling of the living room I.e. the connection between the cold water outgoing pipe and the cold water outgoing header,
Connection between hot water outgoing pipe and hot water return pipe header, connection between cold water return pipe and cold water return pipe header, connection between hot water return pipe and hot water return pipe header, and further each forward pipe header Connection between each return pipe header and branch return pipe, connection between three-way valve and branch return pipe, connection between three-way valve and branch return pipe Since all the parts are concentrated in the header branching unit, even if water leaks at these connection parts, it is possible to receive the water with the drain pan and flow it to the drain pipe. According to the water leakage prevention cold and hot water piping system of the third aspect, the cold water outgoing header and the hot water outgoing header are connected by the bypass outgoing pipe, and the cold water returning pipe header and the hot water returning pipe header are connected by the bypass returning pipe. However, since each pipe is provided with an outgoing pipe open / close valve and a return pipe open / close valve, the open / close valve of the cold / hot water side and the return pipe open / close valve of the cold / hot water side are controlled to open and close. It is possible to selectively circulate cold or hot water to any outgoing / return pipe system, and it is also possible to control the amount of circulating water by controlling the open / close valve on the open side at this time. Become. In addition, even with this cold / hot water piping system to prevent water leakage, pipe joints are not used for branch outgoing pipes and branch return pipes that traverse the ceiling of the living room, and piping connection points are eliminated, so the location of the cause of water leakage is reduced. Disappears.

[0008]

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. Cold heat source equipment 1
Is connected to a cold water forward pipe (C) 3 and a cold water return pipe (CR) 5. The cold water forward pipe 3 and the cold water return pipe 5 penetrate the slab 7 and are piped to each floor. Further, a hot water outgoing pipe (H) 11 and a hot water return pipe (HR) 13 are connected to the heat source device 9, and the hot water outgoing pipe 11 and the hot water return pipe 13 penetrate the slab 7 and are piped to each floor. . The header branch unit 41 is connected to the cold water outgoing pipe 3, the cold water returning pipe 5, the hot water returning pipe 11, and the hot water returning pipe 13 on each floor, and the header branching unit 41 is connected to the cold water outgoing pipe 3, the cold water returning pipe 5, and the hot water outgoing pipe. 11. It is arranged in the ceiling 15 of the living room at a position that is the shortest distance from the hot water return pipe 13 and that is hardly affected by water leakage.

As shown in FIG. 2, a drain pan 43 is provided in the header branch unit 41.
Is connected to a drain pipe (not shown). Above the drain pan 43, a cold water forward pipe header 45, a cold water return pipe header 47, a hot water forward pipe header 49, and a hot water return pipe header 51
The cold water forward pipe header 45 is provided with the cold water return pipe 3, the cold water return pipe header 47 is provided with the cold water return pipe 5, the hot water return pipe header 49 is provided with the hot water return pipe 11, and the hot water return pipe header 51 is provided with the hot water return pipe 13 And are connected respectively. Cold water forward pipe header 4
5. A plurality of branch outgoing pipes 53 and branch return pipes 55 are connected to the cold water return pipe header 47, and each of the branch outgoing pipes 53 and branch return pipes 55 is a water leakage prevention type air conditioner (air conditioning Unit 57 and a fan coil unit (air conditioning unit) 59. The branch outgoing pipe 53 and the branch return pipe 55 are formed of seamless pipes such as resin pipes, and pipe joints 29a and 29 are provided at portions that traverse inside the living room ceiling 15.
b (see FIG. 7) is not used. In other words, there is no place in the branch outgoing pipe 53 and the branch return pipe 55 that runs laterally in the living room ceiling 15 where there is a possibility of water leakage.

The branch outgoing pipe 53 and the branch return pipe 55 on the drain pan 43 are provided with a forward pipe three-way valve 61 and a return pipe three-way valve 63, respectively.
The return pipe three-way valve 63 is connected to the hot water return pipe header 51. Therefore, the branch outward pipe 53 is connected to one of the cold water outward pipe header 45 and the hot water outward pipe header 49 by switching the outward pipe three-way valve 61. In addition, branch return pipe 5
Reference numeral 5 indicates that the return pipe three-way valve 63 is switched to be connected to one of the cold water return pipe header 47 and the hot water return pipe header 51. That is, cold water or hot water can be selectively circulated through the branch outgoing pipe 53 and the branch return pipe 55 by switching the three-way valve (hereinafter, this function is referred to as “cold / hot water switching function”).

When the header branch unit 41 has a function of switching between cold and hot water and a function of controlling the flow rate, an opening valve is provided in each of the three-way valve 61 and the three-way valve 63 without the forward pipe. That is, as shown in FIG. 3, the branch forward pipe 53 and the branch return pipe 55 are provided with a forward pipe open / close valve 65a and a return pipe open / close valve 67a, respectively, and the branch forward pipe 53 downstream of the forward pipe open / close valve 65a is provided with a bypass forward pipe. The hot water return pipe header 49 is connected via a bypass return pipe 71 to the branch return pipe 55 upstream of the return pipe opening / closing valve 67 a, while the hot water return pipe header 49 is connected via 69. The bypass forward pipe 69 and the bypass return pipe 71 are provided with a forward pipe open / close valve 65b and a return pipe open / close valve 67b, respectively. With such a pipe configuration, it is possible to switch between cold and hot water, and also to control the flow rate of the switched circulating water by opening and closing the on-off valve.

As an example of opening / closing control of the on-off valve, for example, in the piping configuration shown in FIG. 3 that enables the cold / hot water switching function and the flow rate control function, as shown in FIG. Signal line 75 from a remote controller (remote controller) 73 connected to
Outgoing pipe open / close valve 65a, return pipe open / close valve 67a, forward pipe open / close valve 65b, return pipe open / close valve 67b in header branch unit 41.
Connect to Then, for example, when switching the air conditioner 57 _n to the heating, the time of the command switch to the remote controller 73 _n of the air conditioner 57 _n is input, branched往管53 _n connected to the air conditioner 57 _n (see FIG. 3) closes the往管off valve 65a _n, closes the place pipe on-off valve 67a _n branch instead tube 55 _n. At the same time, the bypass pipe 69 _n and the bypass pipe 71 _n
The outgoing pipe opening / closing valve 65b _n and the return pipe opening / closing valve 67b _n are opened,
The air conditioner 57 _n so that the hot water is circulated. And, in order to perform the flow rate control, the outward pipe opening / closing valve 65b _n (or
Only the return pipe open / close valve 67b _n ) is controlled to open / close.

As shown in FIGS. 4 and 5, a drain pan 77 is provided inside the water leakage prevention type air conditioner 57 and the fan coil unit 59, and the drain pan 77 is connected to a drain pipe (not shown). A cold / hot water coil 79 is provided above the drain pan 77, and the cold / hot water coil 79 is connected to the branch outgoing pipe 53 and the branch return pipe 55 above the drain pan 77. Therefore, even if a water leak occurs in the cold / hot water coil 79 or the connection point between the cold / hot water coil 79 and the branch outgoing pipe 53 and the branch return pipe 55, all the water leakage is received by the drain pan 77. . Air conditioner 5
7. An inspection port 81 is provided in the casing of the fan coil unit 59, and the inspection port 81 enables inspection of the cold / hot water coil 79 and the drain pan 77.

At the end of the distributed air-conditioning units, a plurality of air-conditioning units are further connected. In a so-called zone correspondence, the branch outgoing pipe 5 is located above the drain pan 77.
Third, the connecting return pipe 85 and the connection return pipe 85 are connected to the branch return pipe 55. The header branch unit 41, the branch outgoing pipe 53, the branch return pipe 55, and the water leakage prevention type air conditioner 57 (or the fan coil unit 59) are used as main members to constitute a water circulation circuit using a water leakage prevention cold and hot water piping system.

In this water leakage prevention cold / hot water piping system, either one of the cold water outgoing pipe 3 and the hot water outgoing pipe 11 is switchably connected to the branch outgoing pipe 53 in the header branch unit 41, and the cold water return pipe 5 One of the hot water return pipes 13 is switchably and collectively connected to the branch return pipe 55, and the pipe connection locations are not dispersed in the ceiling 15 of the living room, so that the locations where water leaks occur are reduced. And, temporarily, the header branch unit 4
Even if a water leak occurs in 1, all the water is received by the drain pan 43, and the water does not leak into the living room. Also,
Since the pipe joint is not used for the branch outgoing pipe 53 and the branch return pipe 55 traversing the inside of the living room ceiling 15, and there are no pipe connection points, there is no place that causes water leakage. Furthermore,
In the air conditioner 57 and the fan coil unit 59 distributed in the living room, the drain pan 77 is provided in each casing, and the connection part with the branch outgoing pipe 53 and the branch return pipe 55 is disposed on the drain pan 77. Therefore, even if a water leak occurs in the cold / hot water coil 79 or the pipe connection location, as in the case of the header branch unit 41, all the water is received by the drain pan 77, and the water does not leak into the living room.

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 part (the header branch unit 41) is integrated. ) And the air conditioner 57, etc., are connected by the branch outgoing pipe 53 and the branch return pipe 55 without using a pipe joint, so that a leak-possible portion is reliably eliminated. 57
And the like, the drain pans 43 and 77 are provided, so that even if a leak occurs in this portion, the leak into the living room can be reliably prevented.

[0017]

As described in detail above, in the water leakage prevention cold / hot water piping system according to the first aspect of the present invention, the cold water outgoing pipe and the hot water outgoing pipe are connected to the branch outgoing pipe by a three-way valve so as to be switchable. At the same time, the cold water return pipe and the hot water return pipe are connected to the branch return pipe by a three-way valve so that they can be switched freely.These connection parts are integrated in the header branch unit, so the pipe connection points are dispersed in the ceiling of the living room And the number of locations where water leakage is caused can be reduced. In addition, branch outgoing pipe running sideways in the ceiling of the living room,
Since the pipe joint is not used for the branch return pipe and the pipe connection point is eliminated, there is no place where water leakage is caused. As a result, the reliability of the cold and hot water piping in the ceiling of the living room is improved,
An economical cold and hot water piping system can be realized without causing water leakage. Further, according to the water leakage prevention cold / hot water piping system of the second aspect, a drain pan is provided below the cold water forward pipe header, the cold water return pipe header, the hot water forward pipe header, the hot water return pipe header and the three-way valve in the header branch unit. In the ceiling of the living room, a portion that becomes a connection point of piping, that is, a connection portion between the cold water outgoing pipe and the cold water outgoing header, a connection portion between the hot water outgoing pipe and the hot water outgoing header, and cold water The connection between the return pipe and the cold water return pipe header, the connection between the hot water return pipe and the hot water return pipe header, and the connection between each forward pipe header and the branch forward pipe, each return pipe header and The connection between the branch return pipe, the connection between the three-way valve and the branch outgoing pipe, and the connection between the three-way valve and the branch return pipe are all concentrated in the header branch unit. Water leakage at the connection This is received by the drain pan also can flow into the drain pipe I, therefore it is possible to further enhance the reliability of the hot and cold water pipes. According to the water leakage prevention cold and hot water piping system of the third aspect, the cold water outgoing header and the hot water outgoing header are connected by the bypass outgoing pipe, and the cold water returning pipe header and the hot water returning pipe header are connected by the bypass returning pipe. Since each pipe was provided with an outgoing pipe open / close valve and return pipe open / close valve,
By controlling the opening / closing valve on the cold water / hot water side and the return pipe on / off valve on the cold / hot water side, it is possible to selectively circulate cold or hot water to any of the forward / return pipe systems. If the open / close valve on the open side is controlled to open / close, the amount of circulating water can also be controlled, so that a cold / hot water switching function and a flow rate control function can be provided without using a three-way valve. In addition, pipe joints are not used for branch outgoing pipes and branch return pipes traversing the ceiling of the living room, and piping connection points are eliminated. Thus, an economical cold / hot water piping system can be realized without causing water leakage.

[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 block diagram of a control wiring circuit for explaining an outline of control.

FIG. 7 is a system diagram of a conventional cold / hot water piping system using a water loop.

[Explanation of symbols]

Reference Signs List 1 cold heat source equipment (heat source equipment) 3 cold water outgoing pipe 9 warm heat source equipment (heat source equipment) 5 cold water return pipe 11 hot water forward pipe 13 hot water return pipe 15 living room ceiling 29a, 2
9b Pipe joint 41 Header branch unit 45 Cold water outgoing header 47 Cold water returning pipe header 49 Hot water returning pipe header 51 Hot water returning pipe header 53 Branch outgoing pipe 55 Branch returning pipe 57 Air conditioner (air conditioning unit) 59 Fan coil unit (air conditioning unit) 61 Outgoing pipe three-way valve (three-way valve) 63 Return pipe three-way valve (three-way valve) 65a, 65b Outgoing pipe opening / closing valve 67a, 6
7b Return pipe on-off valve 69 Bypass outgoing pipe 71 Bypass return pipe

Claims (3)

(57) [Claims] An outgoing pipe of a chilled water system connected to a heat source device.
A water leakage prevention cold / hot water piping system that connects the return pipe and the outgoing pipe / return pipe of the hot water system to a plurality of air conditioning units distributed in the ceiling of the living room. And a header branch unit provided with a cold water return pipe header connected to the cold water return pipe, a hot water return pipe header connected to the hot water return pipe, and a hot water return pipe header connected to the hot water return pipe. One end of a branch outgoing pipe and one end of a branch return pipe not provided with a pipe joint are respectively connected to the individual air conditioning units, and the branch outgoing pipe is connected via a three-way valve provided in the header branch unit. The other end is switchably connected to one of the cold water outgoing header and the hot water outgoing header, and the other end of the branch return pipe is connected to the cold water outflow via a three-way valve provided in the header branch unit. Return tube header Leakage prevention hot and cold water piping system, characterized in that connected freely anyone one and switching between the hot water Kaekan header. 2. A drain pan connected to a drain pipe is provided in the header branch unit below the cold water outgoing pipe header, the cold water returning pipe header, the hot water outgoing pipe header, the hot water returning pipe header, and the three-way valve. The cold / hot water piping system for preventing water leakage according to claim 1, wherein: 3. An outgoing pipe of a chilled water system connected to a heat source device.
A water leakage prevention cold / hot water piping system that connects the return pipe and the outgoing pipe / return pipe of the hot water system to a plurality of air conditioning units distributed in the ceiling of the living room. And a header branch unit provided with a cold water return pipe header connected to the cold water return pipe, a hot water return pipe header connected to the hot water return pipe, and a hot water return pipe header connected to the hot water return pipe. And one end of each of the branch outgoing pipe and the branch return pipe, which is not provided with a pipe joint, is connected to each of the air conditioning units, and the other end of the branch outgoing pipe is connected to the cold water outgoing header, and the branch return pipe is connected. The other end is connected to the chilled water return pipe header, an outgoing pipe open / close valve is provided in the branch outgoing pipe, and a return pipe open / close valve is provided in the branch return pipe, and a bypass outgoing pipe is provided in the branch outgoing pipe downstream of the outgoing pipe open / close valve. And connect the hot water outgoing header via A hot water return pipe header is connected to the branch return pipe on the upstream side of the return pipe open / close valve via a bypass return pipe, and a forward pipe open / close valve is provided for the bypass outward pipe, and a return pipe open / close valve is provided for the bypass return pipe. Water leakage prevention cold and hot water piping system.