JPH07113465B2 - Piping method in air conditioning system for multi-storey floor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention provides heating and cooling by supplying (circulating) a heat medium from a heat source device installed outdoors on a rooftop or the like to an indoor unit installed on each floor. The present invention relates to a piping method of a system for performing.

[Conventional technology]

From the viewpoint of economical efficiency, workability, manageability, etc., a system for cooling and heating the entire building or the entire building with one heat source machine has become the mainstream.

As shown in FIG. 5, the piping method of such an air-conditioning system is performed by using a large-diameter main pipe 2 that uses an iron pipe between the heat source unit 1 and each floor, and between the indoor unit 3 on each floor (each room). A branch pipe 4 using an iron pipe branched from the main pipe 2 is used.

[Problems of conventional technology]

 Therefore, there are the following problems.

a. Since all steel pipes are used, there is concern about corrosion over the long term.

b. There are many connection points in the bend and branch to use the elbow and branch member, and this connection is for screw connection,
Skill is required for construction.

c. There is a risk of leakage due to the screw connection.

d. Iron pipes are heavy and difficult to work with and difficult to repair should a leak occur.

e. This is troublesome because the pipe is wrapped with a heat insulating material on site.

f. Since the flow rate changes with each branch, it is necessary to calculate this flow rate change one by one and select a pipe with a different diameter according to the flow rate, which makes the design difficult.

An object of the present invention is to propose a piping method that solves the above problems a to f.

[Means for Solving the Problems]

The present invention proposes the following piping method in order to solve the above problems.

a.Reciprocating main piping is performed between the outdoor heat source machine and each floor by using a resin pipe having heat-sealing properties, b.A header for return and a header for return are placed on each floor, and the main piping is used. Connecting to each of these headers, c. Connecting the header and the indoor unit by connecting the forward pipe and the return pipe together with a twin tube covered with a heat insulating material.

In the above piping, if polybutene is used as the piping material used, the heat fusion method can be adopted when connecting and the workability is good, and the twin tube has appropriate flexibility. Easy piping. Further, since it is also excellent in durability and chemical resistance, it is desirable to adopt a polybutene pipe in the construction of the present invention, but other resin pipes may be used as long as the conditions are adjusted.

〔Example〕

FIG. 1 shows the main pipe 5 made of polybutene.
As shown in FIG. 2, the socket 6 is used for the connection.
Then, the main pipe 5 is heated to its melting point, and the main pipe 5 is inserted into the socket 6 and fused.

However, the above heat fusion method is adopted in the connection between the polybutene pipes, and in the case of the connection with the metal pipe of the heat source unit or the indoor unit, the cap is used.

FIG. 3 shows a twin tube 7 made of polybuden in which a forward pipe 8 and a return pipe 9 used between a header and an indoor unit are covered together with a heat insulating material 10.

FIG. 4 shows an embodiment of the present invention, in which reference numeral 1 is an outdoor unit, and the outdoor unit 1 and the header 11 placed on each floor are connected by a main pipe 5 consisting of a return pipe and a return pipe.

And the twin tube 7 is provided between the header 11 and each indoor unit 3.
Then each is connected.

The twin tube 7 is designed to be used after cutting a long one, and there is no connection point in the middle.

[Effect of the present invention]

The present invention can expect the following effects by adopting the above piping method.

a. Since resin pipes are used for both main piping and twin tubes, there is no risk of corrosion over the long term.

b. When a polybutene pipe is used as the main pipe, it can be connected by a heat fusion method using a socket of the same quality, and workability is good.

c. Since there is no screw connection point, there is no risk of leakage.

d. The resin tube is lightweight, and the twin tube is flexible, and the header and the indoor unit can be piped in a single line, so workability is good and repair is needed. In this case, one can be pulled out and replaced with a new one, making repair work easy.

e.Because the main piping can be pre-insulated at the factory,
There is no hassle on site.

f. Since the header branch ports are evenly pressured, the twin tube eliminates the problem of having to select its aperture based on tedious flow calculations.

[Brief description of drawings]

1 is an explanatory view of the main pipe used in the present invention, FIG. 2 is an explanatory view of the connection of the main pipe, FIG. 3 is an explanatory view of a twin tube, and FIG. 4 is an explanation of a piping method according to the present invention. 5 and 5 are explanatory views of a conventional piping method. 1 ... Outdoor unit, 2 ... Main pipe, 3 ... Indoor unit, 4 ... Branch pipe, 5 ... Main pipe, 6 ... Socket, 7 ... Twin tube, 8 ... Forward pipe, 9 ... Return pipe, 10 ...... Insulation 11 …… Header

Claims (2)

[Claims] 1. A main pipe for reciprocating an outdoor heat source machine and each floor using a resin pipe having a heat-sealing property. A forward header and a return header are placed on each floor,
The main pipe is connected to each of the headers, and the header and the indoor unit are connected to each other by a forward and return pipe together with a twin tube covered with a heat insulating material. Method. 2. A piping method in a heating and cooling system for a multi-story floor as set forth in claim 1, wherein a polybutene pipe is adopted for the main pipe and the twin tube.