JPH05340685A - Wire fin type heat-exchanger and manufacturing device thereof - Google Patents

Abstract

PURPOSE:To provide a heat-exchanger which has excellent ability of removing dew condensation and ability of removing dust and prevents the occurrence of a trouble due to deformation of a fin by a method wherein retainers are arranged in parallel between the adjoining heat- transfer pipes of a plurality of heat-transfer pipes arranged in parallel in a state that rows are arranged in a good order, and a plurality of wires are wound around the heat-transfer pipes and the retainers to form a fin. CONSTITUTION:Heat-transfer pipes 5 are installed in parallel at equal intervals between plates, positioned opposite to each other, of a frame body 2, the heat-transfer pipes 5 are projected through the plates 3 to the outside and alternately intercoupled through respective U-shape bent pipes 6 to form a single zigzag pipe through which a refrigerant passes. Retainers 8 are installed between the plates 3 in a state to be arranged between the adjoining heat- transfer pipes 5 of the heat-transfer pipes 5 in parallel approximately at equal intervals. Further, a plurality of wires 9 are wound around, in order, the heat-transfer pipes 5 and the retainers 8 to form a fin. Since the wires 9 are extended at right angles with the heat- transfer pipes 5 and the retainers 8 and pointed in the same direction, dew condensed at the wires 9 is dropped along the wires 9 and dew condensation is simply removed by effecting wiping along the wire 9 by means of cloth.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger and its manufacturing device.

[0002]

2. Description of the Related Art Conventional heat exchangers are commonly used
As disclosed in Japanese Patent Laid-Open No. 62-62, a heat transfer tube through which a refrigerant passes is configured to penetrate plate fins made of a large number of metal flat plates.

There is also an example (Japanese Utility Model Laid-Open No. 57-154867) in which a fin woven of metal flocked fibers in a plate shape is used instead of the metal flat plate.

[0004]

[Problem to be Solved] In the former case of a heat exchanger using plate fins of a metal plate, when it is used as an evaporator, the heat in the atmosphere is taken away so that moisture is likely to condense on the fins and stay there. Poor transmission and freezing may occur after a long period of retention.

On the other hand, in the case of the latter case where the flocked fibers are used for the fins, the condensed water droplets can be spheroidized to easily fall and prevent freezing and the like, but since the fibers are woven, dust is left on the texture and the like. Dust easily adheres and is not easy to remove.

Further, both fins are flat plates of metal or plate fins woven of fibers in a plate shape. However, when flying stones or other foreign matter hits, the fins are easily deformed, and the hit portions are crushed as a whole to cause air leakage. It may hinder the flow and reduce the heat exchange efficiency.

It is not easy to restore a fin that has been crushed once. Therefore, it is necessary to dispose a net-shaped cover or the like in front of the heat exchanger to prevent foreign matter from entering.

The present invention has been made in view of the above points, and an object of the present invention is to provide a heat exchanger and a manufacturing apparatus for the same, which is excellent in eliminating dew condensation, excellent in removing dust and the like, and avoiding problems caused by fin deformation. It is in.

[0009]

In order to achieve the above object, the present invention provides at least one retainer between adjacent heat transfer tubes of a plurality of heat transfer tubes arranged in parallel in parallel. The heat transfer tubes and the retainer are arranged in parallel and a plurality of wires are sequentially wound around the retainer to form a fin.

Since a plurality of wires are wound around the heat transfer tube and the retainer as a weft yarn in sequence like a warp yarn to form a fin, a large number of wires are arranged in one direction.
Therefore, dew condensation easily drops along the wire, and the dew condensation can be easily eliminated by wiping the wire along the wire.

Further, by brushing along the wire, dust and the like can be easily and surely removed.

Further, since the wire is wound around the heat transfer tube or the retainer, it is hard to be deformed by collision of foreign matter, and a front net-like cover is not necessarily required.

In order to manufacture such a heat exchanger, the second aspect of the present invention is to form a small hole at the tip of a frame for fixedly supporting the frame of the heat exchanger and a plurality of comb teeth arranged at equal intervals. A comb-shaped member and two comb-shaped members, and a support member that stacks the comb-shaped members so that one comb tooth faces a gap between the other comb-shaped members and supports each comb-shaped member so that the comb-shaped members can move up and down. An elevating mechanism for alternately elevating and lowering the comb-shaped member, and a tensioning means for tensioning a large number of wires which have one end fixed to one of a pair of plates forming a part of the frame and have passed through the small holes of the comb teeth. The wire fin type heat exchanger was provided as a manufacturing device.

A wire, one end of which is fixed to one side plate of the frame body, is tensioned by a pulling means through the small holes of the comb teeth of the two comb-shaped members located above and below each other, and the heat transfer tube or the retainer is held. Is passed between upper and lower wires like a weft to move the two comb-like members up and down with each other by an elevating mechanism, and then a heat transfer tube or retainer is passed like a weft again to re-insert the two comb-like members. By repeatedly moving up and down, the wire fins can be easily formed and the heat exchanger can be easily manufactured.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention shown in FIGS. 1 and 2 will be described below.

FIG. 1 is an external view of a wire fin type heat exchanger 1 according to this embodiment. Five heat transfer tubes 5 are installed in parallel between a pair of opposing plates 3 of the rectangular frame body 2 at equal intervals, and each heat transfer tube 5 penetrates the plate 3 and projects outward.
The U-shaped bend pipes 6 are alternately connected to form one meandering pipe through which the refrigerant flows, and joining pipes 7 are attached to the ends of the refrigerant inlet and outlet.

Between the adjacent heat transfer tubes 5 of the heat transfer tubes 5 arranged in parallel, two retainers 8, which are metal rods, are arranged in parallel at substantially equal intervals, and between the pair of plates 3. Is installed in. A plurality of wires 9 are sequentially wound around the heat transfer tube 5 and the retainer 8 arranged in parallel between the pair of plates 3 facing each other as described above to form a fin.

That is, as shown in FIG. 2, the heat transfer tube 5 and the retainer 8 are wound as a weft, and a wire 9 is sewn like a warp. There is an appropriate gap between the wires 9 to form an air passage.

The refrigerant that evaporates in the heat transfer tube 5 removes heat of vaporization from the air passing through the ventilation passage through the fins formed by the wires 9 and exchanges heat to send cold air into the room. Wire 9 is heat transfer tube 5
In addition to being wound around, it also winds around the retainer 8 to facilitate heat transfer and improve heat exchange efficiency.

Further, since the plurality of wires 9 are oriented in the same direction at right angles to the heat transfer tube 5 and the retainer 8, dew condensation formed on the wire 9 easily falls along the wire 9 and the wire 9 is also formed. Condensation can be easily eliminated by wiping with a cloth along the.

Further, dust attached to the wire 9 can be easily and surely removed by brushing along the wire 9 with a brush.

Further, even if a stepping stone or the like hits the front surface of the heat exchanger 1, the wire 9 is wound around the heat transfer tube 5 and the retainer 8 and does not have a plate-like protruding portion, so that the fin itself is deformed to form an air passage. You can avoid problems such as blocking. It should be noted that the conventional plate fin cannot be easily restored to its original shape when a plurality of plate fins are crushed with a certain area.

Next, an apparatus for manufacturing the wire fin type heat exchanger 1 described above will be described with reference to FIG.

The heat exchanger 1 is mounted on the upper surface of the front half of the plate-shaped mount 21.
The frame body 2 is placed. The frame body 2 is placed on the pedestal 21 in a U-shaped state including the pair of plates 3 and one side plate 4 before one of the pair of side plates is attached, and is laid in the center of the pedestal 21. The side opened to the receiving member 22 is abutted and fixed.

Holes for inserting the heat transfer tubes 5 and the retainers 8 are previously formed in a row in the left and right plates 3 facing each other, and one end of a large number of wires 9 is fixed to the side plate 4 to the rear side. It is extended.

A pair of columns 23 are erected on both sides of the center of the pedestal 21, two vertical grooves are formed inside the columns 23, and one of the combs is formed in the groove on the front side of the left and right columns 23. The plate member 30 is vertically movable, and the other comb plate member 31 is inserted in the rear groove.
Is still inserted so that it can be moved up and down.

The comb-shaped plate members 30 and 31 have comb teeth 30 in the lower half.
a, 31a are formed, and the comb teeth 30a, 31a are arranged at a predetermined interval and at an equal pitch. Comb tooth
Small holes 30b and 31b are formed at the lower ends of 30a and 31a, and each small hole 30b and 31b has a notch in the left horizontal direction and communicates with the outside.

The front and rear comb teeth 30a and 31a are offset from each other by a half pitch, and the rear comb teeth 31a are located in correspondence with the gaps between the front comb teeth 30a.

Brackets 30c and 31c are provided on upper portions of the left and right side edges of the comb-shaped plate members 30 and 31, respectively. The bracket 30c projecting from the front comb-shaped plate member 30 first protrudes outward and is then bent at a right angle to the front. A long hole 30d is formed in the bent portion in the front-rear direction. ing.

On the other hand, the bracket 31c projecting from the rear comb-shaped plate member 31 first projects to the outside and is then bent backward at a right angle, and the bent portion has a long length in the front-rear direction. Hole
31d is formed. However, one of the brackets 31c has a slightly extended tip.

Bearings 24 project further upward from the upper ends of the left and right struts 23, and swinging members 26 are swingably provided on the bearings 24 via pivot shafts 25 so that the swinging members 26 are pivotally supported at their centers. Has been.

A pin 27 fixed to the front end of the swing member 26
Is slidably fitted in a horizontally long slot 30d formed in the bracket 30c of the front comb plate member 30 in the front-rear direction, while the pin 28 fixed to the rear end of the swing member 26 is attached to the rear side. The comb-shaped plate member 31 is slidably fitted in a horizontally long slot 31d formed in a bracket 31c in the front-rear direction.

Therefore, when the pair of right and left swing members 26 swing, the front and rear comb plate members 30 and 31 supported by the front and rear pins 27 and 28 move up and down in opposite directions.

Bracket on one side of one comb plate member 30
A spring 41 is interposed between the abutment 40 and 30d to urge the comb plate member 30 upward, and the other comb plate member 30d.
A tip end of a cylinder rod 43 protruding upward from a cylinder 42 fixed to the pedestal 21 is fitted to an extending portion of the bracket 31c on one side of 31.

A switch button 44 is provided near one of the columns 23.
Is provided, and the cylinder 42 is repeatedly activated and deactivated each time the switch button 44 is pressed.

Therefore, when the cylinder 42 is not in operation, the front comb-shaped plate member 30 is raised by the spring 41, and conversely, the rear comb-shaped plate member 31 is lowered to move the cylinder rod of the cylinder 42.
Although 43 is in the retracted state (the state shown in FIG. 3), when the switch button 44 is pressed in this state, the cylinder 42 operates and the cylinder rod 43 projects upward, so that the rear comb plate member 31 Ascends, and the front comb-shaped plate member 30 descends against the spring 41.

When the switch button 44 is pressed again, the cylinder 42 is deactivated this time, and the spring 41 causes the front comb plate member 30 to rise and the rear comb plate member 31 to descend. As described above, each time the switch button 44 is pressed, the front comb-shaped plate member 30 and the rear comb-shaped plate member 31 move up and down in the opposite directions.

Behind such comb-shaped plate members 30 and 31, a horizontally long sliding member 51 is provided so as to be slidable back and forth along two grooves 50 formed in the frame 21 so as to be oriented in the front-back direction. The spring 53 is interposed between the sliding member 51 and the pedestal 52 fixed to the front of both ends of the sliding member 51.
Is urged backwards by.

On the upper surface of the sliding member 51, there is provided a holding member 54 for holding the rear end of the wire 9 in a horizontal row.

The manufacturing apparatus has the above-mentioned structure, and the manufacturing process of the wire fin type heat exchanger 1 will be described below.

First, of the frame 2 of the heat exchanger 1, a U-shaped frame is prepared in advance from two facing plates 3 excluding one side plate 4 on one side and one side plate 4,
On the front half of the gantry 21, the open end portions of the two plates 3 are placed in contact with the receiving member 22.

Then, the front ends of the required number of wires 9 are fixed to the inner surface of the side plate 4 in a horizontal row, the wires 9 are extended rearward, and one opening of the frame 2 and the comb teeth 30a of the comb-shaped plate members 30, 31 are formed. , 31a are sewn in and the rear end is held in line by the holding member 54 on the upper surface of the rear sliding member 51.

The wire 9 is pulled rearward by the spring 53 to maintain an appropriate tension, and adjacent ones of the wires 9 are alternately combed with the comb teeth 30a, 31a of the comb-shaped plate members 30, 31.
When the small holes 30b, 31b are inserted into the small holes 30b, 31b provided in the horizontal cutout and hooked, the small holes 30b, 31b are located at vertically different positions, so that the plurality of wires 9 have their front ends and rear ends arranged in a horizontal row. The wires 9 which are aligned and adjacent to each other at the central comb-shaped plate members 30 and 31 are opened up and down with respect to each other to form a flat diamond-shaped opening between the wire 9 located above and the wire 9 located below. is doing.

From the inner surface of the side plate 4, an upward opening of an acute angle is formed by the upwardly directed wire 9 and the downwardly directed wire 9, and the heat transfer tube 5 located at the leftmost side in the drawing is first formed in this opening. Left and right plate 3
It is inserted and inserted between the two.

When the switch button 44 is pushed, the cylinder 42 moves the comb-shaped plate members 30 and 31 up and down in opposite directions so that the wire 9 located above moves downward and the wire 9 located below moves upward. Therefore, the wire 9 is wound around the erected heat transfer tube 5 for about a quarter turn.

Then, the wire 9 that crosses the next retainer 8
Inserted in the rear opening from the crossing position and moved forward like a hammer and installed between the left and right plates 3 and pressing the switch button 44 again, the adjacent wires 9 alternate up and down and wind around the retainer 8. .. In this way, the heat transfer tube 5 or the retainer 8 is inserted like a weft thread, and the warp threads 9 are sequentially wound while being beaten, so that it can be woven like a woven fabric.

When the wire 9 is wound around the last heat transfer tube 5, the wire 9 is temporarily cut at an appropriate position and left, and when one side plate 4 left is attached to the plate 3, the wire 9 is attached to the inner surface thereof. Secure the rear end of the. Then, the bend pipe 6 is joined to the heat transfer pipe 5 protruding to the outside of the plate 3 to complete the wire fin type heat exchanger 1.

By using this manufacturing apparatus as described above, the wire fin type heat exchanger 1 can be manufactured efficiently.

In this embodiment, the small holes 30 of the comb teeth 30a, 31a are provided.
Although one wire 9 is passed through each of b and 31b, several wires may be passed through at once, and the number of wires 9 to be used can be appropriately changed.

[0050]

According to the first aspect of the present invention, since the fins are formed by sequentially winding the wire around the heat transfer tube and the retainer in the heat exchanger, the dew condensation is less likely to stay and the dew condensation can be easily eliminated, and the dust is also removed. It is easy to do and it is difficult to deform even when a foreign object collides.

Further, by winding the wire around the retainer, it is possible to increase the contact area as much as possible to improve the heat transfer coefficient and keep the heat exchange efficiency high.

The second aspect of the present invention is a manufacturing apparatus for weaving a heat transfer tube and a retainer as a weft and a wire as a warp, so that a wire fin type heat exchanger can be efficiently manufactured.

[Brief description of drawings]

FIG. 1 is a perspective view of a plate fin type heat exchanger according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a perspective view of an apparatus for manufacturing a plate fin type heat exchanger.

[Explanation of symbols]

1 ... Plate fin type heat exchanger, 2 ... Frame body, 3 ... Plate, 4 ... Side plate, 5 ... Heat transfer tube, 6 ... Bend tube,
7 ... Junction pipe, 8 ... Retainer, 9 ... Wire, 21 ... Stand, 22
... Receiving member, 23 ... Strut, 24 ... Bearing, 25 ... Axis, 26 ... Oscillating member, 30, 31 ... Comb plate member, 40 ... Abutment, 41 ... Spring, 42 ... Cylinder, 43 ... Cylinder rod, 44 ... switch button, 50 ... groove, 51 ... sliding member, 52 ... pedestal, 53 ... spring, 54 ... holding member.

Claims (2)

[Claims] 1. At least one retainer is arranged in parallel between adjacent heat transfer tubes of a plurality of heat transfer tubes arranged in parallel in parallel with each other, and a plurality of heat transfer tubes and retainers are arranged in parallel. A wire-fin type heat exchanger, characterized in that a plurality of wires are sequentially wound to form a fin. 2. A frame for fixedly supporting the frame of the heat exchanger,
Comb-shaped members with small holes formed at the tips of a plurality of comb-shaped teeth arranged at equal intervals, and two comb-shaped members are stacked so that one comb-tooth faces the gap between the other comb-teeth. A support member that supports each comb-shaped member so that the comb-shaped member can move up and down, a lift mechanism that alternately lifts and lowers the two comb-shaped members, and one end fixed to one of a pair of plates that form a part of the frame body. An apparatus for manufacturing a wire fin type heat exchanger, comprising: tensioning means for tensioning a large number of wires that have passed through the small holes of the comb teeth.