JPH02192932A - Manufacture of resin fine tube heat exchanger - Google Patents

Abstract

PURPOSE:To make the arranging density of many fine heat transfer tubes made of resin uniform, to realize a zigzaglike fluid passage structure and to improve heat exchanging efficiency by coating the many heat transfer tubes with adhesive, winding them on a core rod of a predetermined structure as a rolled heat transfer tube, and engaging it with a baffle plate. CONSTITUTION:Heat transfer tubes 11 each made of many synthetic resin fine tubes are aligned in parallel at an equal interval. They are coated at a predetermined interval in a stripe shape with adhesive 12. The discs of core rods 5 are abutted against the corresponding adhesive coating parts from the coated end side, and adhesively wound on the outer surface while adhesively rotating. Thus, a ringlike adhesive layer 6 sealed from the inner surface side to the outer surface side is formed at the adhered part on the outer surface of the disc 4, bundled, and an inner partition chamber 13 is formed. The discs 4 are disposed on non-corresponding predetermined adhesive layer 6 to be engaged with a ringlike baffle plate 7 to form an outer partition wall 12. Eventually, a predetermined ending process is performed on the respective heat transfer tubes 11. The rolled heat transfer tube body 10 is contained and installed in a tube body 1 through the baffle plate 7.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a method for manufacturing a resin tube heat exchanger.

(Prior art) In recent years, development of multi-tube shell heat exchangers using synthetic resin heat exchanger tubes has been progressing, but synthetic resin heat exchanger tubes have extremely low thermal conductivity compared to metal heat exchanger tubes. Considering that the pressure resistance is low and there is no dust clogging, etc.,
By reducing the diameter of the heat transfer tube as much as possible, forming it into a thin tube shape, and reducing the wall thickness of the heat transfer tube, the heat exchange efficiency is improved by reducing thermal resistance and increasing the heat transfer area. There is.

However, on the other hand, if a thin tube structure with such a thin wall thickness and a small tube diameter is used, there is a problem in that it is difficult to maintain because blister naturally occurs. Therefore, it is usually considered to use a large number of heat transfer capillary tubes made of synthetic resin tied together in a cylindrical shape, but if they are simply tied together, it is difficult to make the bundling density uniform among the capillary tubes. There is a problem in that the heat medium flowing outside the heat exchanger tubes does not flow uniformly so that it can come into contact with all the heat exchanger tubes, and uneven flow may occur, so that some heat exchanger tubes are not fully utilized for heat exchange. Therefore, for example, the fifth
As shown in the figure, a central core (not shown) having a large number of holes is provided at the center of a plurality of heat exchanger tube bundles 21a to 21e, and a plurality of baffle plates 22a to 22d are provided in the center core to be perpendicular to the heat exchanger tube bundles. It has already been proposed that the heat transfer tube bundles 21a to 21e are arranged inside the tube body 23 via the baffle plates 22a to 22d to eliminate uneven flow of the heat medium flowing outside the heat transfer tubes. (See, for example, Japanese Utility Model Application No. 192088/1988).

In the configuration of this prior art, the fixing positions of the tube bundles are alternately shifted between adjacent baffle plates, particularly with the aim of improving heat exchange efficiency.

(The problem that the invention seeks to solve is that in the case of the above-mentioned prior art configuration, the heat exchanger tubes are divided into a plurality of tube bundles, so the gap between the heat exchanger tubes in each tube bundle is smaller than the gap between the plurality of tube bundles.) There is a problem in that the tube bundle becomes very narrow, and the heat exchange fluid does not flow sufficiently through the tube bundle, resulting in a decrease in heat exchange performance.

(Means for Solving the Problems) The present invention has been made for the purpose of solving the above-mentioned problems. For example, as shown in FIGS. A large number of resin tubes 11, 11, etc. are arranged in parallel, and each resin thin tube 11. l! A predetermined curable adhesive 12.12... is applied in a plurality of strips at predetermined intervals in the direction in which the curable adhesives 12, 12, and so on are arranged in parallel. The plurality of resin tubes 11, 11, etc. are wound into a roll using a mandrel 5 provided with a disk-shaped winding part 4,4, which has an internal partition function. Baffle plates 7, 7, 7, 7, 7, 7, 7, 9, 7, 7, 9, 7, 7, 7, 7, 7, 7, 7, and 7, each having an external partition function as an external partition wall, correspond to the adhesive-applied portions 6. After the two are fitted together, terminal processing is performed.

(Function) In the method for manufacturing a resin capillary heat exchanger of the present invention, a large number of resin capillaries +1.11... of a predetermined length are arranged in parallel, and then the resin capillary tubes 11,11... are arranged in parallel. A plurality of predetermined curable adhesives 12, 12, etc. are applied in a strip-like manner, and internal partition walls are formed in correspondence with the coated portions of the strip-shaped adhesive at predetermined intervals. 4.4... are positioned and wound into a roll to be integrated. Therefore,
In the wound roll-shaped heat exchanger tube body IO, heat exchanger tubes each consisting of a large number of resin thin tubes 11, 11 are arranged evenly at predetermined intervals in both the circumferential direction and the radial direction.

Further, adhesive application portions 6.6 are provided at predetermined intervals on the outer circumferential side of the roll-shaped heat transfer tube body 10 configured as described above.
A baffle plate 7, 7, etc. having an external partition function is fitted to the baffle plates 7, 7, etc., and the baffle plates 7, 7, .

(Effects of the Invention) Therefore, according to the method for manufacturing a heat exchanger made of resin tubes of the present invention, the heat exchanger tube arrangement density is uniform, there is no uneven flow of the heat exchange fluid, and the heat exchanger can be heated by a relatively easy method and at a low cost. It becomes possible to provide a resin tube heat exchanger with high exchange efficiency.

(Example) FIGS. 1 to 4 show the construction of a resin tube shell duplex heat exchanger according to an example of the present invention.

First, FIG. 4 shows the overall structure of the shell-tube heat exchanger made of thin resin tubes, and reference numeral 1 in the figure indicates a tube body of a predetermined diameter. Tube sheets 2.2 are attached to both ends of the tube body 1 by a method such as welding, and a rolled heat transfer tube body 10 (described later) is attached to the tube body 1 by using the tube sheets 2.2.
It is designed to be stored and fixed inside as shown in the figure. Reference numeral 3.3 denotes a lid attached to the outside of each tube sheet 2.2.

As shown in FIGS. 1 to 3, the heat transfer tube body 1.0 has a mandrel 5 in the center, and a disk 4.4 serving as an internal partition wall is fitted to the mandrel 5 at a predetermined interval. It consists of a large number of heat transfer tubes 11, 11... made of thin synthetic resin tubes wound into a roll to form a predetermined space inside through the roll-shaped heat transfer tubes. Ring-shaped hardened adhesive layers 6, 6... are formed at predetermined intervals from the inner peripheral surface side to the outer periphery of the body 1O, and are bound by the ring-shaped adhesive layers 6, 6..., and Each heat exchanger tube 11, 11... is sealed in the axial direction. In addition, baffle plates 7.7, which have a larger diameter, are fitted to the outer circumferential surface of the ring-shaped adhesive layers 6.6, . The entire rolled heat transfer tube 10 is installed in a fitted state within the tube 311 without bending at all, and the baffle plates 7,7... are installed outside the heat transfer tube IO. It forms compartments 12, 12, . . . for heat exchange.

In addition, the baffle plates 7.7... have the internal partition function on at least one of the ring-shaped adhesive layers 6.6... formed at a plurality of locations at predetermined intervals. The disc 4.4... is designed to be fitted only to those that do not exist, and the above-mentioned rolled heat transfer tube body!
0 is fitted into the tube body 1 as shown in FIG. 4, a fluid passage through which a heat exchange fluid flows is formed inside the heat transfer tube 10 (see FIG. 2). ).

The discs 4.4 also define an internal compartment 13 which is located on either side of the fluid passageway and communicates with the external compartment 12, including the fluid passageway.

Therefore, as is clear from FIG. 2, the heat exchanger tube 10 has baffle plates 7, 7, . 4.4..., the inner and outer passages through which the heat exchange fluid flows in a zigzag manner in the radial direction through the multiple heat transfer tubes 11. As a result, not only no drift occurs, but also the contact between each heat exchanger tube 2,2... and the heat exchange fluid and the heat transfer efficiency are greatly improved, and the heat exchange performance is particularly improved.

By the way, the heat transfer tube body IO is manufactured as follows.

(1) First, the heat transfer tube 11 is made of a large number of synthetic resin thin tubes.
11... are accurately arranged in parallel at equal intervals as shown in FIG.

(2) Next, the heat exchanger tubes 11 in the juxtaposed state. Adhesive 12, 12... is applied in strips at predetermined intervals to II.... The application positions of the adhesives 12, 12, etc. correspond to the fitting positions of the disc 4 on the side of the mandrel 5 and the fitting positions of the ring-shaped baffle plates 7, 7, etc. between them. is set.

(3) After that, each disc 4.4 of the mandrel 5 is brought into contact with the corresponding adhesive application part from the application end side, and while the adhesive is rotated, the outer peripheral surface of the disc 4.4 is It is then bonded and wound into a roll.

In this way, a ring-shaped adhesive layer 6.6 as shown in FIG. 13.13.
form.

(4) The disk 4.4 on the outer periphery of the rolled heat transfer tube 10 formed as in (3) above is located on a predetermined adhesive layer 6.6 that does not correspond to the second adhesive layer 6.6. As shown in the figure, ring-shaped baffle plates 7.7 are fitted to form external compartments 12, 12.

(5) Finally, each heat exchanger tube 11°11
Perform the specified terminal processing on...

Then, the roll-shaped heat transfer tube body 10 shown in FIG. 2 and configured as described above is housed and installed in the tube body 1 via the baffle plates 7, 7, etc., as shown in FIG. 4. .

Therefore, according to the structure of the shell tube heat exchanger made of resin thin tubes of the above embodiment, adhesive 12 is applied to a large number of resin thin tube heat exchanger tubes 11, and the adhesive 12 is wound around the mandrel 5 having a predetermined structure. A roll-shaped heat exchanger tube IO can be formed easily and with high precision just by going.

Then, a ring-shaped adhesive 1116.6 is formed on the wound layer portion coated with the adhesive 12, and finally, the baffle plates 7, 7, and so on are simply fitted to bind and separate the inner and outer compartments. It is possible to form both heat exchanger tubes 11.
11. By making the arrangement density uniform and realizing an effective zigzag fluid passage structure, it becomes possible to obtain a considerable improvement in heat exchange efficiency.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a developed state (manufacturing process) of a rolled heat exchanger tube of a resin tube heat exchanger according to an embodiment of the present invention, FIG. 2 is a perspective view of the rolled heat exchanger tube, Fig. 3 is a sectional view of the same essential parts, Fig. 4 is a partially cutaway front view of a shell tube type heat exchanger having the same structure, and Fig. 5 is a partially cutaway front view of a conventional shell duplex type heat exchanger. It is a front view. 1...Tube body 2...Tube sheet 3...Lid 4...Disk 5...Mandrel 6...Ring-shaped adhesive layer 7 ... Baffle plate lO ... Heat transfer tube body 11 ... Heat transfer tube 12 ... Adhesive Fig. 1 Fig. 4 Fig. 5 "Fig. 3

Claims (1)

[Claims] 1. Heat exchange resin thin tube (11), (11) of a predetermined length.
A large number of ・ are installed in parallel, each resin thin tube (11), (11)
A predetermined curable adhesive (12), (12
)... is applied in multiple strips at predetermined intervals, and a disc-shaped winding part ( 4),(
4) By winding up the plurality of resin thin tubes (11), (11), etc. using the mandrel (5) provided with..., they are wound into a roll and integrated. The adhesive application portions (6), (6) on the outer periphery of the rolled heat transfer tube (10)
A resin capillary tube characterized in that after fitting baffle plates (7), (7), etc. of a predetermined width with an external partition function corresponding to a predetermined one, terminal treatment is performed. A method for manufacturing a heat exchanger.