JP5256105B2 - Heat exchanger for refrigeration air conditioner and transfer tool for the heat exchanger - Google Patents

Description

This invention relates to a heat exchanger for cooling Kosora conditioner, is particularly related to shape of the transfer tool of a fin tube type heat exchanger and its heat exchanger substantially U.

As a conventional refrigeration air conditioning system, those ports balloon each other a shaped finned tube heat exchanger of substantially U planar shape and the propeller fan arranged to face outwardly in the double stack, total four heat exchanger units The technique used as a main body is shown (for example, patent document 1).

JP 2008-267720 A

The refrigeration and air-conditioning equipment as described above can be installed in an elevator installed in a local building by bringing in an assembly and assembly completed in a conventional factory to the local site and lifting it with a large crane etc. Divided into dimensional weights and then reassembled on site after transport. But the recent cold Kosora control device increasingly large in size, its weight also be there more than 2 tons. There are an increasing number of cases where such heavy objects are installed on the rooftops of high-rise buildings that cannot be reached even with large cranes, in places surrounded by buildings, in densely populated areas, etc. Carrying in on-site has become technically and costly difficult, and the demand for the development of refrigerating and air-conditioning systems that can be easily divided and reassembled on-site is increasing rapidly.

  In the example shown in the above-mentioned Patent Document 1, the conventional divided conveyance and on-site reassembly are carried out by conveying the substantially U-shaped fin tube heat exchanger, machine room, and propeller fan device as divided units, respectively. Had been reassembled into stacks. Since the work in this case was carried out, lifted and suspended using hydraulic jacks, nylon suspension ropes, etc. based on the judgment of the worker at the installation site, the laminated fins of the aluminum thin plate laminated structure of the heat exchanger There was a problem of permanently deforming.

  In accordance with an increase in the demand for development of a refrigerating and air-conditioning machine that can easily perform divided conveyance and on-site assembly as described above, there is a risk of permanent deformation of the laminated fins in the conventional conveyance reassembly dimensions. It aims at providing the heat exchanger for refrigeration air conditioners which solved the subject called, and the tool for the conveyance.

The first refrigerating air conditioner heat exchanger according to the invention, a laminated fins unit laminate fins stacked thin plates formed into a shape of a plurality bonded substantially U of the layered fin-shaped this substantially U A hairpin side plate provided at one end portion and a header portion side plate provided at the other end portion are provided. A heat exchanger is lifted on the hairpin side plate and the header portion side plate, and a screw for transporting. A hole is provided , and the hairpin part side plate is provided in the outermost unit laminated fin and the innermost unit laminated fin among the plurality of unit laminated fins, and the header part side plate is A heat exchanger for a refrigeration air conditioner, which is provided so as to straddle an end of a laminated fin.

  Moreover, the transfer tool for the heat exchanger according to the second invention is a transfer tool for the refrigeration air conditioner heat exchanger according to the first invention, and this tool includes a hairpin side column, a header side column, and these columns. It is formed with the top plate to be joined, and the front shape is a gate type, and the hairpin side column, the hairpin side plate of the heat exchanger, the header side column, and the header of the heat exchanger are bolts from the column side Are combined with the heat exchanger and integrated with the heat exchanger, and the heat exchanger can be lifted and conveyed by eyebolts provided on the top plate.

According to the first invention, since the above configuration is adopted, the heat exchanger for the refrigeration air conditioner can be transported to a high-rise building rooftop, etc., and a screw hole for lifting can be used at the time of reassembly. There is no damage to the laminated fins.
Further, the heat exchanger can be easily transferred and reassembled using the transfer tool according to the second aspect of the invention, and the thin laminated fins are not damaged. In addition, there is an excellent effect that a large crane for carrying in and reassembling is not required on the rooftop of a high-rise building and the cost for carrying in and reassembling can be greatly reduced.

2 is a perspective view showing a laminated fin according to Embodiment 1. FIG. It is a figure which shows the detail of the hairpin part side plate of Embodiment 1. FIG. FIG. 4 is a diagram showing details of a header part side plate of the first embodiment. FIG. 6 is a diagram illustrating a transfer tool according to a second embodiment. It is a figure which shows the state which attached the conveyance tool of Embodiment 2 to the heat exchanger.

Embodiment 1 FIG.
Embodiment 1 of the present invention will be described below with reference to the drawings.
The heat exchanger of the refrigerating air conditioner according to the first embodiment, as shown in the perspective view of FIG. 1, in which the planar shape with a shape of a fin tube type heat exchanger of substantially U. This fin tube type heat exchanger 100 (hereinafter abbreviated as “heat exchanger 100”) is a unit laminated fin in which a large number of thin aluminum plates having a thickness of about 0.1 mm are laminated, in this example, four unit laminated fins 1a to 1d. The laminated fin 1 which couple | bonded, the several conduit | pipe for refrigerant | coolants 2, the header 3, the distribution pipe 4, the header part side plate 5, and the hairpin part side plate 6 are provided. The copper pipe 2 that is a refrigerant conduit is mechanically coupled to the laminated fin 1 of FIG. The laminated fins 1 mainly contact the air flow to exchange heat, and the copper pipe 2 passes through the refrigerant and mainly exchanges heat with the refrigerant. The header 3 has high-pressure side refrigerant in and out, and the distribution pipe 4 has low-pressure side refrigerant in and out. The size of the heat exchanger 100 is, for example, about 0.8 m in height, 1.2 m in width, and 0.7 m in depth.

In order to make this Embodiment 1 easier to understand, description will be made including specific numerical values and manufacturing method of the laminated fin 1 configured by providing four rows of unit laminated fins 1a to 1d. As an example, a method of manufacturing the inner unit laminated fin 1a will be described.
The size of one fin is 20 mm wide, 780 mm long, and 0.1 mm thick. The fin has 38 burring holes that are slightly larger than the diameter of the copper tube 2 by press molding and is provided in the center of the width, and 38 fins are provided at 20 mm intervals in the longitudinal direction. The height of the burring is about 2 mm including the plate thickness. After press molding, about 1000 sheets are laminated at an interval of about 2 mm. Similar to the fins, a hairpin portion side plate 6 having a plate thickness of about 0.3 to 3 mm provided with a burring hole through which the copper tube 2 passes is provided. A detailed view of the hairpin portion side plate 6 is shown in FIG. Separately, a copper tube 2 having a diameter of 8 mm and having a hairpin portion 2 a bent at 180 ° at the center of the length is attached to the laminated fin 1 through a hole with a burring of the hairpin portion side plate 6. Insert into the hole. As a result, the copper tube 2 and the laminated fin 1 are coupled by frictional contact. The outer unit laminated fin 1d is manufactured in the same manner, but the hairpin part side plate 6 is the same as that for the unit laminated fin 1a except that it is different from the left and right.
The unit laminated fins 1b and 1c have the same manufacturing method as the unit laminated fin 1a except that the hairpin portion side plate 6 is not provided. The four unit laminated fins 1a to 1d manufactured as described above are laminated as shown in FIG. 1, and the copper tubes 2 of the four unit laminated fins 1a to 1d which are aligned and laminated are shown in detail in FIG. The attachment is performed so as to penetrate the hole with the burring of the part side plate 5.
In addition, the hairpin part side plate 6 and the header part side plate 5 are provided with burring screw holes for attaching a transfer tool to be described later. This screw hole is provided with a female screw at a protrusion formed by burring, but a nut may be provided by welding or the like instead of this burring screw hole.

Next, the end of the copper tube 2 protruding from the header portion side plate 5 is expanded, and the frictional contact between the laminated fin 1 and the copper tube 2 is promoted by the caulking effect, so that the header portion side plate 5 and the laminated fin 1 Fix both. Thereafter, the header 3, the distribution pipe 4, a capillary tube (not shown) and the like are brazed to the copper tube 2. After this, the laminated fin 1 is bent into a U-shape and becomes the shape shown in FIG.
Although the fin is made of aluminum, it may be made of copper if long-term reliability is ensured, such as when used in a corrosive environment, and is not limited to these if the workability and thermal conductivity are good. The distributor 4 is installed in a heat pump type that can be switched between cooling and heating, but is generally not installed in a refrigeration machine. In addition, although the copper pipe was shown as the conduit | pipe 2 for refrigerant | coolants, an aluminum pipe may be sufficient, and another material may be sufficient if workability and heat conductivity are good.
Since the heat exchanger 100 of the large refrigeration air conditioner manufactured in this way is a single unit that weighs several tens of kilograms and the thickness of the laminated fin 1 is thin and easily deformed, various dedicated transfer machines are used. Transported or transferred. It can be transported or transferred by a large number of people manually, but it is difficult to prevent deformation of the laminated fin 1 without any special tool. In addition, although the example of four unit lamination | stacking fins was shown, it does not restrict to this.

Embodiment 2. FIG.
Next, in the second embodiment, the heat exchanger 100 is transported using the burring screw holes provided in the header part side plate 5 and the hairpin part side plate 6 provided in the heat exchanger 100 according to the first embodiment. A tool for assembling will be described with reference to the drawings.
As shown in FIG. 4, the front shape of the transfer tool 50 (hereinafter referred to as a tool) forms a gate shape. The tool 50 includes a front frame 21 corresponding to a top plate, a header side frame 22, a hairpin side frame 23, a rear frame 24, a center frame 25, and a header side column 26 fixed to the top plate by welding or bolting, The unit laminated fin 1a hairpin side column 27 and the unit laminated fin 1d hairpin side column 28 form a gate shape. Such a tool is attached so as to cover the top of the heat exchanger 100 shown in FIG. That is, the header part side plate 5 attached to the heat exchanger 100 described above, the hairpin part side plate 6 provided on the single layer laminated fin 1a and the single layer laminated fin 1d, the header side column 26 and the hairpin of the tool 50. The side struts 29 are fastened by bolts not shown in the laminated fin mounting holes 30. An eyebolt 32 is attached to the central frame 25 corresponding to the top plate. A sketch of the state in which the tool 50 and the heat exchanger 100 are combined is shown in FIG.
In this state, the tool 50 and the heat exchanger 100 are firmly fixed, and the heat exchanger 100 can be lifted by hooking a hook or the like on the eyebolt 32.
Moreover, the tool 50 has a structure that can be fixed at a distance of about 10 mm from the heat exchanger 100 so that the tool 50 is not directly in contact with other than the header part side plate 5 and the hairpin part side plate 6 of the heat exchanger 100. The fin 1 is configured not to be deformed by hitting it.
If the amount of deviation from the center of gravity of the eyebolt 32 is within 5% of the width and depth of the heat exchanger 100 with respect to the mounting position accuracy of the eyebolt 32 , there is no problem even if a tilt occurs during lifting. However, in order to enhance safety, the central frame 25 is provided with either a long hole or a hole larger in diameter than the eyebolt diameter. In the latter case, a screw washer of the eyebolt 32 is used with a washer having a diameter covering the large diameter hole. A structure that has a length penetrating the center frame 25 and uses a nut for the eyebolt 32 may adjust the position of the center of gravity when the heat exchanger 100 is lifted.
If the tool 50 according to FIG. 4 is used for the suspension, the suspension can be suspended while the heat exchanger 100 is held horizontally, and the suspension can be performed without deforming the laminated fin 1. It becomes possible to transport the heat exchanger 100 without damaging the laminated fins 1 of the heat exchanger 100 without distorting the entire heat exchanger 100 when it is lifted, and using the eyebolts 32 for suspension on the rooftop of a high-rise building or the like. In addition to the above-described two-stage reassembly of the heat exchanger 100, the heat exchanger 100 combined as a refrigeration air conditioner at the time of regular inspection at the site is provided by a temporary simple crane such as a hoist on the roof. Can be easily disassembled without damaging the laminated fins 1.

Hereinafter, reassembly of the refrigeration air conditioner and the heat exchanger 100 according to the first embodiment which are conveyed separately for each major component on a high-rise building rooftop or the like will be described.
First, on a rooftop of a high-rise building or the like, a cargo handling device as shown in, for example, JP-A-2002-114479, which can be easily assembled, disassembled, and moved, is prepared.
On the rooftop, there is already a foundation part where the refrigeration air conditioner is installed. The frame of the cargo handling device is assembled and installed at a height of about 4 m above the upper surface of the foundation so as to straddle the foundation. As a result, the load can be moved from the vicinity of the foundation onto the foundation. In addition, from the elevator exit of the building to the vicinity of the foundation, each divided part is carried in by a carriage or the like.
Assembling at the installation site of the refrigeration and air-conditioning equipment, the platform is first placed on the foundation with the cargo handling device, then the heat exchanger is held by the tool 50, attached to the hook of the cargo handling device, lifted, moved horizontally, The first stage heat exchanger is lowered and installed at a predetermined position on the platform, and the second stage is installed in the same manner.
Next, the electrical wiring of the machine room and the fan motor is connected to the machine room, the electrical supply wiring is connected to the power supply unit of the refrigeration air conditioner, the bell mouth and the panels are attached, and the assembly of the refrigeration air conditioner is completed.
In this way, by using the carry-in tool 50 and the cargo handling device, assembly work can be performed at the installation site of the refrigeration air conditioner. In addition, when assembling work, it is possible to work without deforming the laminated fins by transferring and stacking substantially U-shaped heat exchangers while being suspended horizontally. In addition, the refrigeration / air-conditioning apparatus can be installed at an installation site where a large crane cannot be used, and the carrying-in cost can be greatly reduced.

  The present invention can be used for a heat exchanger of a refrigeration air conditioner that enables divided transportation and local assembly without damaging the heat exchanger.

1 laminating fins, 1a to 1d unit laminating fins, 2 refrigerant conduits, 5 header side plates,
6 hairpin side plate, 7 screw hole, 26 header side support, 29 hairpin side support,
32 eyebolts, 50 transfer tools, 100 heat exchangers.

Claims (7)

A heat exchanger for a refrigerating and air-conditioning apparatus, wherein a plurality of unit laminated fins in which thin plates are laminated are joined to each other to form a substantially U-shaped laminated fin, and this substantially U-shaped laminated A hairpin part side plate provided at one end of the fin and a header part side plate provided at the other end are provided, and the heat exchanger is lifted to the hairpin part side plate and the header part side plate, A screw hole for conveyance is provided , and the hairpin part side plate is provided in the outermost unit laminated fin and the innermost unit laminated fin among the plurality of unit laminated fins, and the header The partial side plate is provided so as to straddle the end portion of the laminated fin. A plurality of holes are provided in the hairpin portion side plate and the header portion side plate, and a plurality of refrigerant conduits penetrating the plurality of holes provided in the laminated fins are engaged with the holes. The heat exchanger for a refrigeration air conditioner according to claim 1, wherein the hairpin part side plate and the header part side plate are mechanically coupled to the laminated fins. The heat exchanger for a refrigeration air conditioner according to claim 1, wherein the screw holes provided in the hairpin part side plate and the header part side plate are provided in a burring hole. The heat exchanger for a refrigeration air conditioner according to claim 2, wherein the hole provided in the laminated fin is a burring hole formed in the thin plate. It is a conveyance tool of the refrigerating air conditioner heat exchanger according to claim 1, wherein the tool is formed of a hairpin side column, a header side column, and a top plate connecting these columns, and the front shape is a gate type. The hairpin side strut and the hairpin portion side plate of the heat exchanger, and the header side strut and the header portion side plate of the heat exchanger are coupled by bolts from the strut side to be integrated with the heat exchanger. And the transfer tool of the heat exchanger for refrigeration air conditioners provided with the structure which enables the said heat exchanger to be lifted and conveyed with the eyebolt provided in the said top plate. A plurality of unit laminated fins in which thin plates are laminated are combined to form a substantially fin-shaped laminated fin, a hairpin portion side plate provided at one end of the substantially U-shaped laminated fin, and the other A heat exchanger for a refrigeration air conditioner, provided with a header part side plate provided at an end, the hairpin part side plate and the header part side plate are provided with screw holes for lifting and transporting the heat exchanger The tool is formed of a hairpin side column, a header side column, and a top plate connecting these columns, and the front shape is a gate shape, and the hairpin side column and the heat exchanger The hairpin part side plate and the header side post and the header part side plate of the heat exchanger are combined with the bolt from the post side to be integrated with the heat exchanger, and the heat is applied by the eyebolt provided on the top plate. Lift and transfer exchanger Conveying tool of the heat exchanger for a refrigeration air-conditioner, characterized in that it has the structure and ability. The top plate is provided with either a long hole or a hole with a diameter larger than the diameter of the eyebolt, and the eyebolt passing through the hole is located on the top plate at the center of gravity when the heat exchanger is lifted. It is fixed, The transfer tool of the heat exchanger for refrigeration air conditioners of Claim 5 or Claim 6 characterized by the above-mentioned.

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