JPH05196261A - Piping method and piping structure for refrigerant pipe for air-conditioner in unit building - Google Patents

Abstract

(57) [Summary] [Object] To provide a piping method and a piping structure for a refrigerant pipe for an air conditioner in a unit building, which enables easy and efficient piping of the refrigerant pipe and also reduces cost. [Structure] Each building unit 1 that composes unit building 1
Refrigerant pipes 3A and 3B are installed in the factory at 0 and 20, respectively, and each refrigerant pipe 3A and 3B is installed at the construction site when the building units 10 and 20 are combined.
Connect the ends of A and 3B. It is only necessary to connect the refrigerant pipes 3A and 3B on site, and it is not necessary to insert the refrigerant pipe into the guide pipe as in the conventional case, so workability is improved and piping can be performed easily and efficiently. Further, since the guide pipe is unnecessary, the cost can be reduced, and the work of installing the guide pipe is eliminated even in the factory, and the workability can be improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a piping method and a piping structure for a refrigerant pipe for an air conditioner, and more particularly, to a lower floor building unit constituting a unit building and an upper floor building unit combined therewith. It can be used when connecting the indoor unit and the outdoor unit.

[0002]

BACKGROUND ART A unit building is constructed by combining a plurality of building units produced in advance in a factory at a construction site. In such a unit building, an indoor unit and an outdoor unit of an air conditioner (hereinafter referred to as an air conditioner) are generally provided, and as a method of piping a refrigerant pipe that connects the indoor unit and the outdoor unit, The following methods are used. That is, the indoor unit provided in the building unit and the outdoor unit provided outside the building unit are connected after a plurality of building units are combined at the construction site, and the refrigerant pipe at this time is insulated. A copper pipe covered with a material is piped according to the distance between the indoor unit and the outdoor unit.

In such piping of the refrigerant pipe, all of the piping work is on-site work, and it takes time and effort to mount various brackets for supporting the refrigerant pipe and adjust the dimensions of the refrigerant pipe. In order to perform the piping efficiently while ensuring the property, the present applicant previously submitted the application No. 2-26865. To explain the outline of this piping method, as shown in FIG. 5, the first-floor building unit 40 and the first-floor building unit 40
The guide pipes 42, 43 formed to have a length substantially corresponding to the second-floor building unit 41 mounted on the upper side of the second-floor building unit 41 have upper beams 44 and lower-beams of the second-floor building unit 41. It is supported by brackets 46 and 47 attached to 45, and an elastic member 48 is provided between the brackets 46 and 47. These are installed in the factory in advance, and at the construction site, after the building units 40 and 41 are combined, the refrigerant pipe 49 is passed through the guide pipes 42 and 43 by using, for example, a wire or the like. Is connected to the indoor unit, and the other end is connected to the outdoor unit.

[0004]

However, after the building units 40 and 41 are combined, the refrigerant pipe 49 is connected to the guide pipe.
In the method of providing through the inside of the guide tubes 42, 43, first, at the site, for example, a wire or the like in which the refrigerant pipe 49 is connected from one of the guide tubes 42, 43 is passed, and this wire is pulled from the other of the guide tubes 42, 43. It has to be done, which requires more work on site and is troublesome and troublesome. Further, since the refrigerant pipe 49 is made of a copper pipe, it is easily bent, and therefore, when passing through the guide pipes 42, 43,
If it is pulled suddenly, there is a risk that the guide tubes 42 and 43 may be crushed at the corners and the like. Therefore, there is a problem in that it requires careful work and is inefficient. Furthermore, since the guide tubes 42 and 43 must be provided for each unit 40 and 41, the cost of parts increases and the cost increases, and the number of parts increases and the management and installation work become complicated. There was also the problem of poor workability in the factory.

An object of the present invention is to provide a method of piping a refrigerant pipe for an air conditioner in a unit building, which can reduce the work in the field and the factory, can easily and efficiently perform the piping of the refrigerant pipe, and can also reduce the cost. It is to provide a piping structure.

[0006]

The piping method of the present invention is a piping method for a refrigerant pipe for an air conditioner for connecting an indoor unit and an outdoor unit in a unit building constructed by combining a plurality of building units. The refrigerant pipes arranged across the plurality of building units are divided for each of the building units and attached to each building unit at the factory in advance, and each of the building units is assembled at the construction site. It is characterized in that the ends of the refrigerant pipes are connected.

Further, the piping structure of the present invention is a piping structure of a refrigerant pipe for an air conditioner for connecting between an indoor unit and an outdoor unit in a unit building constructed by combining a plurality of building units, The refrigerant pipes arranged across the building units are divided for each of the building units and installed in advance in each building unit at the factory, and when the connecting ends of the refrigerant pipes are separated from each other, Each of them closes an opening, and when the building units are combined and connected to each other, the refrigerant pipes are connected by a pair of connecting members that can communicate with each other.

Further, as the piping structure of the present invention, a joint made of a shape memory alloy is provided, in which a connecting end portion of each refrigerant pipe is provided with an insertion hole into which each refrigerant pipe is inserted, and the diameter of the insertion hole is changed by temperature change. You may connect by.

[0009]

According to the present invention as described above, the refrigerant pipes connecting the indoor unit and the outdoor unit are divided and formed for each building unit, and the refrigerant pipes are attached to each building unit in advance at the factory. Then, when assembling each building unit at a construction site, the refrigerant pipes are connected to each other for piping. At the construction site, it is only necessary to connect the refrigerant pipes, improving workability,
Since the guide tube is not required, the workability in the factory is improved and the cost is reduced. Incidentally, the connection of each refrigerant pipe may be welded and joined to each refrigerant pipe end, or may be screwed with a connecting pipe, in particular, at the connection end of each refrigerant pipe, each refrigerant pipe is separated. The opening is closed when the refrigerant is connected to each other, and if a pair of connecting members are provided that allow the refrigerant tubes to communicate with each other when they are connected to each other, it is also possible to fill the refrigerant tubes with fluorocarbon gas, etc. Becomes Further, if the connection ends of the respective refrigerant pipes are connected by a joint made of a shape memory alloy, the connecting work can be performed more easily and surely than by welding.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an overall perspective view of a unit building 1 such as a house to which the piping structure of a refrigerant pipe for an air conditioner of the first embodiment of the present invention is applied, and FIG. 2 is an exploded side view of the unit building 1. Are shown respectively. In these figures, the second-floor building unit 20 is placed on top of the first-floor building unit 10, and these are combined to form a unit building 1.
The unit building 1 includes an air conditioner 2 including indoor units 11 and 21 provided in the building units 10 and 20 on the respective floors and an outdoor unit 12 provided outside the first-floor building unit 10. Is provided.

Between the indoor units 11 and 21 and the outdoor unit 12 is shown in FIG.
2 refrigerant pipes 3 going up and down as shown in Fig.
This refrigerant pipe 3 is vertically divided into two, as shown in FIG. 2, to be a first-stage refrigerant pipe 3A and a second-stage refrigerant pipe 3B. That is, the first floor building unit 10
On the side surface of the first floor refrigerant pipe 3A, which is attached to the first floor building unit 10 by being supported by piping supports 13 at the upper and lower two places, one end of the first floor refrigerant pipe 3A is constructed. It can be connected to the outdoor unit 12 at the site, and a male coupling 14 is attached to the other end in advance at the factory. In addition, as shown in FIG. 2, the first-floor refrigerant pipe 3A has a branch refrigerant pipe that is connected to the indoor unit 11 in the first-floor building unit 10 from the middle thereof.
15 is attached, and this branch refrigerant pipe 15 is connected to the indoor unit 11 at the factory.

On the other hand, on the side surface of the second-floor building unit 20, a second-floor refrigerant pipe 3B is provided as shown in FIGS. 1 and 2, and the second-floor refrigerant pipe 3B is a pipe support 22. It is supported and penetrates the mounting hole 20A in the outer wall of the second-floor building unit 20, and is connected to the indoor unit 21 in the second-floor building unit 20 in advance at the factory. A female type coupling 23, which is connected to the male type coupling 14 to form a pair of connecting members 4, is preliminarily attached to one end of the second-stage refrigerant pipe 3B at the factory.

The male coupling 14 and the female coupling 23 of the pair of connecting members 4 close their respective openings when they are separated from each other, but when they are connected, the insides thereof are It is configured to communicate with each other and is a commercially available product that is generally used. Therefore, if these couplings 14 and 23 are connected, the second-floor refrigerant pipe 3B and the first-floor refrigerant pipe 3A communicate with each other.

Further, the male type coupling 14 is arranged such that its horizontal upper surface position is substantially at the same height as the upper surface of the first-floor building unit 10, and the female coupling 23 has its tip at the second-floor building unit. It is arranged at almost the same height as the lower surface of 20. The tip ends of the refrigerant pipes 3A and 3B, to which the both couplings 14 and 23 are attached, can be slightly moved up and down with respect to the pipe supports 13 and 22. After they are combined, the worker
And pulling the tip of 3B, these couplings 14,23
Can be connected. Incidentally, each of the refrigerant pipes 3A
Since the connecting members 4 and 3B can be easily connected to each other when the gap between the joints is small, it is preferable that the connecting members 4 and 3B be arranged at positions close to the columns (not shown) forming the building units 10 and 20.

As shown in FIG. 3, such a refrigerant pipe 3 is sufficiently wound around the copper pipe 30 and its surroundings, and
And a covering material 31 which is a heat insulating material. The covering material 31 is wound so that the upper surface of the first-stage refrigerant pipe 3A is substantially flush with the horizontal upper surface position of the male coupling 14. On the other hand, the second-floor refrigerant pipe 3B
Has a surface substantially the same as the lower surface position of the female coupling 23, and the overlapping portion 31 extends downward from the edge of the surface.
Have an A When the first and second floor refrigerant pipes 3A and 3B are connected to each other, the overlapping portion 31A is a covering material 31 for the first floor refrigerant pipe 3A.
Is covered, which prevents a decrease in the heat insulating effect of the joint.

Next, the operation of this embodiment will be described. First, the first-floor building unit 10, the second-floor building unit 20, etc. are produced at the factory, and the indoor unit 11,
21 will be installed at each factory.

Next, the first-floor refrigerant pipe 3A is attached to the side surface of the first-floor building unit 10 via a pipe support 13. At this time, the upper portion of the refrigerant pipe 3A is arranged such that the horizontal upper surface of the male coupling 14 attached thereto is located substantially on the same plane as the upper surface of the first floor building unit 10, and the refrigerant pipe 3A The lower part of is arranged so that it can be connected to the outdoor unit 12 installed outside the first-floor building unit 10 on site. Also,
The refrigerant pipe 15 branched from the first-floor refrigerant pipe 3A is connected to the indoor unit 11 in the first-floor building unit 10 at the factory.

On the other hand, the second floor refrigerant pipe 3B is attached to the side surface of the second floor building unit 20 via the pipe support 22.
At this time, in the lower portion of the refrigerant pipe 3B, the horizontal lower surface of the female coupling 23 attached thereto is located on the second floor building unit 20.
The bottom surface of the refrigerant pipe 3B
The upper part of the above is inserted from the mounting hole 20A formed in the outer wall of the second-floor building unit 20 and connected to the indoor unit 21 installed in the second-floor building unit 20 at the factory.

When the first-floor building unit 10 and the second-floor building unit 20 in which the respective refrigerant pipes 3A and 3B have been installed in the factory in this manner are carried into the construction site, 1 before connecting the respective refrigerant pipes 3A and 3B.
An outdoor unit 12 is installed outside the floor building unit 10. Then, the worker appropriately fixes one end of the first-floor refrigerant pipe 3A to the outdoor unit 12 with a connecting fitting or the like and connects them.

Next, the second-floor building unit 20 is placed on the first-floor building unit 10 to form the unit building 1. At this time, the operator grabs the tip ends of the refrigerant tubes 3A and 3B in a lightly free state and connects the couplings 14 and 23 so that the couplings 14 and 23 are substantially vertically aligned. As a result, the closed openings are opened, and the insides of the two are communicated with each other. Further, the joint portion between the two refrigerant pipes 3A and 3B is covered with the overlapping portion 31A of the covering material 31 of the second-stage refrigerant pipe 3B.

According to this embodiment as described above, the following effects can be obtained. In other words, the piping of the refrigerant pipe 3 is such that, when the first floor refrigerant pipe 3A is connected to the outdoor unit 12 at the construction site and then the first floor building unit 10 and the second floor building unit 20 are combined, the pair of connecting members 4 is connected. If the connection is made, the piping of the refrigerant pipe 3 that connects the indoor unit 21 and the outdoor unit 12 is completed, so that there is an effect that the site work can be reduced.

Further, the connection of the refrigerant pipe 3 is made by connecting the male type coupling 14 and the female type coupling 23, so that the interiors of the both are communicated with each other. This has the effect of facilitating connection and improving the efficiency of piping work.

Further, each refrigerant pipe 3A, 3B is a building unit.
Since it is installed close to the outer walls of the units 10 and 20, it does not get in the way when the building units 10 and 20 are brought into the site. Also,
Since each refrigerant pipe 3A, 3B is pre-installed in each building unit 10, 20 at the factory, compared to the conventional case where the refrigerant pipes are carried in separately,
Never lose it. In addition, in the joint portion of the refrigerant pipe 3, a superposed portion 31A is formed on the covering material 31, and when the refrigerant pipe 3 is joined, the superposed portion 31A covers the outer periphery of the covering material 31 on the opposite side. There is an effect that the effect does not decrease.

If connecting fittings similar to the pair of connecting members 4 are used for the connecting portion between the first-floor refrigerant pipe 3A and the outdoor unit 12, the connecting members 4 communicate only when they are connected. Was
Since the openings are closed when they are separated from each other, the indoor unit 21 in the second-floor building unit 20 and the refrigerant pipe 3B for the second floor, and the indoor unit 11 and the first-floor refrigerant pipe in the first floor building unit 10 It is also possible to fill the inside of 3A with a refrigerant such as CFC gas in advance at the factory. By doing so, it is possible to save the labor of filling the refrigerant such as CFC gas after connecting the refrigerant pipes 3A and 3B at the site, and it is possible to further improve the workability at the site.

Furthermore, since a guide tube is not required as in the conventional case, the work of attaching and managing the guide tube is unnecessary in the factory, the workability can be improved, and the number of parts can be reduced, so that the cost can be reduced.

FIG. 4 shows a second embodiment of the present invention. This embodiment is similar to the first embodiment in that each refrigerant pipe 3A attached to each building unit 10, 20 in the factory is
3B is connected by a shape memory alloy joint 50. The shape memory alloy joint 50 is made of copper alloy or nickel.
The titanium alloy is formed into a pipe shape.
When the copper pipe 30 of the refrigerant pipes 3A and 3B is inserted into the insertion hole 51 of the joint 50 with its inner diameter enlarged and the joint 50 is heated, the shape memory alloy contracts and the communication hole 51 contracts to reduce the diameter of each copper pipe. Tighten it tightly to 30. If this shape memory alloy contracts once, it will not expand again unless it is cooled to a low temperature of about -40 degrees, so it is kept in a contracted state at room temperature and the refrigerant tubes 3A, 3B
Can be connected firmly and securely. In this embodiment, the refrigerant pipes 3A and 3B are arranged between the outer wall 52 and the inner wall 53 of the unit building, and the ceiling panel 55 and the second floor building unit 20 attached to the lower surface of the upper beam 54 of the first floor building unit 10 are arranged. Lower beam
56 is provided so as to penetrate through a floor material 57 attached to the upper surface so that the refrigerant pipe 3 is not exposed outdoors or indoors.

In this embodiment as described above, when the building units 10 and 20 to which the refrigerant pipes 3A and 3B are previously attached are combined, the copper pipe 30 at the end of each refrigerant pipe 3A and 3B is connected to the joint 50. Insertion hole 51
Then, the joint 50 is heated and contracted to connect the refrigerant pipes 3A and 3B.

Also in this embodiment, the first
Similar to the embodiment, it is possible to reduce the on-site work and improve the efficiency of the piping work, and since the guide pipe is not required, the workability in the factory can be improved and the cost can be reduced. Also,
Since the shape memory alloy joint 50 is used, the refrigerant tubes 3A and 3B can be reliably connected by a simple operation.

The present invention is not limited to the above-described embodiments, but includes modifications and improvements as long as the object of the present invention can be achieved. For example, in order to connect the respective refrigerant pipes 3A, 3B in the present invention, it is not limited to the method described in the first and second embodiments, but may be connected using welding, brazing, flare joints, various mechanical joints, etc. You may. However, the use of the connection methods of the first and second embodiments has the advantage that the workability on site can be improved.

Further, although the piping structure of the refrigerant pipe 3 is used in the two-story unit building 1 in each of the above-described embodiments, the present invention is not limited to this, and an indoor unit and an outdoor unit are provided in the unit building 1. However, as long as a refrigerant pipe for connecting them is provided, it can be used for a three-story unit building or a single-story unit building in which a plurality of building units are arranged in parallel.

Further, in the first embodiment, a pair of connecting members 4 consisting of the male type coupling 14 and the female type coupling 23 are used for connecting the refrigerant pipes 3, and the male type coupling 14 is used for the first floor building. Although it is attached to the unit 10 side and the female coupling 23 is attached to the second floor building unit 20 side, this arrangement may be reversed.

Further, the outdoor unit 12 is installed outside the first-floor building unit 10, but it is not limited to this and may be installed, for example, on the second-floor building unit 20 side, as long as it can be connected to the indoor unit 21.

Further, in each of the above-mentioned embodiments, the indoor units 11 and 21 are preliminarily attached to the building units 10 and 21 at the factory, and the refrigerant pipes 3A and 3B are connected to the indoor units 11 and 21 at the factory. Not exclusively. For example, when only the refrigerant pipes 3A and 3B are installed in the building units 10 and 21 at the factory and the indoor units 11 and 21 and the outdoor unit 12 are installed in the building units 10 and 21 on site and are connected at the site, Is also available. Also in this case, if the structure of each of the above-described embodiments is used to connect the refrigerant pipes 3A and 3B to the indoor units 11 and 21, and the outdoor unit 12, there is an advantage that they can be easily connected.

[0034]

As described above, according to the piping method and the piping structure of the refrigerant pipe for the air conditioner of the present invention, the work in the field and the factory can be reduced and the piping of the refrigerant pipe can be easily and efficiently performed. At the same time, the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view showing an entire unit building to which a piping structure according to a first embodiment of the present invention is applied.

FIG. 2 is an exploded side view of the unit building.

FIG. 3 is a detailed view of a main part showing a connection structure of a refrigerant pipe.

FIG. 4 is a detailed view of the essential portions showing the refrigerant pipe connection structure of the second embodiment of the present invention.

FIG. 5 is a piping structure diagram of a conventional refrigerant pipe for an air conditioner.

[Explanation of symbols]

 1 unit building 2 air conditioner (air conditioner) 3 refrigerant pipe 3A first floor refrigerant pipe 3B second floor refrigerant pipe 4 pair of connecting members 11,21 indoor unit 12 outdoor unit 14 male coupling 23 female coupling 30 Copper pipe 50 Fitting 51 Insertion hole

Claims (3)

[Claims] 1. A method of piping a refrigerant pipe for an air conditioner, which connects an indoor unit and an outdoor unit in a unit building configured by combining a plurality of building units, the method spanning a plurality of building units. Characteristically, the refrigerant pipes that are arranged as described above are divided into each of the building units and are attached to each building unit in advance at the factory, and when the building units are assembled at the construction site, the ends of each refrigerant pipe are connected. Method of piping refrigerant pipes for air conditioners in unit buildings. 2. A piping structure of a refrigerant pipe for an air conditioner, which connects an indoor unit and an outdoor unit in a unit building configured by combining a plurality of building units, which straddles the plurality of building units. The refrigerant pipes that are arranged as described above are divided for each of the building units and installed in advance in each building unit at the factory, and the connecting ends of the refrigerant pipes each close the opening when they are separated, A piping structure of a refrigerant pipe for an air conditioner in a unit building, wherein each refrigerant pipe is connected by a pair of connecting members that can communicate with each other when the building units are combined and connected to each other. 3. A piping structure of a refrigerant pipe for an air conditioner, which connects an indoor unit and an outdoor unit in a unit building configured by combining a plurality of building units, which straddles the plurality of building units. Refrigerant pipes that are arranged in each of the building units are divided and installed in advance in each building unit at the factory, and the connection end of each refrigerant pipe is provided with an insertion hole into which each refrigerant pipe is inserted. A piping structure for a refrigerant pipe for an air conditioner in a unit building, wherein the pipes are connected by a shape memory alloy joint in which a diameter of an insertion hole changes.