JPS61105100A - Heat exchanger - Google Patents

Abstract

PURPOSE:To contrive to prevent the fin-shaped strip type member from rolling back and falling off by a method wherein a heat exchanging pipe is wound in spiral manner in the same direction as the winding direction of a strip-shaped member. CONSTITUTION:A strip-shaped member 16 provided with a continuous needle-shaped fin 15 is wound in spiral manner in counter clockwise direction on the outer periphery of a heat exchanging pipe 14. A cut-off is formed on the strip-shaped member 16 at right angle for the longitudinal direction, both side parts formed by the cut-off are stood to be U-shaped structure. The counterclockwise wound spine fin tube 13 is formed as follows; that is, the beginning end part of a beginning end part member 16 of the strip-shaped member 16 is fixed on the heat exchanger pipe 14, then the heat exchanger pipe 14 is rotated in an arrow mark A direction, simultaneously, moved at optional speed toward an arrow mark B direction, then the straight pipe-shaped structure having an optional pitch is finished. On the counterclockwise spiral spine fin tube 13, the winding direction of the belt-shaped member 16 and the spiral direction of the spine fin tube 13 are both the same counterclockwise direction, accordingly, the strip-shaped member 16 is further tightened on the outer periphery of the heat exchanging pipe 14 at the rotating and bending working time of the spine fin tube 13, therefore, the belt-shaped member 16 is fixed by pressure on the heat exchanging pipe 14 without using adhesives.

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Industrial Field of Application The present invention relates to a heat exchanger in which a band member having needle-shaped fins arranged thereon is wound spirally around the outer periphery of a heat exchanger YA tube.

(1. Prior Art) In the conventional technology, which was filed in Japanese Patent Application No. 111314/1986, which precedes the present invention, a band-like member having continuous needle fins is wound spirally around the outer periphery of a heat exchange tube. l!i
A heat exchanger is obtained by spirally winding a heat exchanger tube, but if the winding direction of the band-shaped member and the winding direction of the heat exchange tube are opposite to each other, the band-shaped member Disadvantage that the paper rolls back and unravels, and JP-A-55-15519
As described in Publication No. 4, there is a drawback that an adhesive for preventing rollback is required.

(c) Problems to be Solved by the Invention The present invention solves these drawbacks and provides a heat exchanger in which the strip-shaped S material does not unwind and does not require an adhesive to prevent the strip-shaped member from unwinding. This is what we provide.

(b) Means for Solving the Problems The present invention provides a heat exchange tube in which a band-like member having continuous needle fins is spirally wound in a spiral manner in the same direction as the winding direction of the band-like member. It was rotated.

(E) Effect According to the present invention, when the heat exchange tube is wound spirally, the fin-shaped band member on the outer periphery of the heat exchange tube does not roll back and come off.

(f) Example FIG. 1 shows a refrigerator equipped with a heat exchanger according to the present invention,
(11 is the refrigerator body, and the outer box (11' is insulated with U)
(Inner box (3) is fully installed through 21t, and this inner box (3)
It is divided into a freezer compartment (51) and a refrigerator compartment (6) by a partition part (4), and a condensing pipe (81).
A refrigeration cycle is constructed from a heat exchanger (91, etc.), and the cold air generated by the heat exchanger (9) is sent to the freezing room (5) and the refrigerator room (61) at 7 rtt'n. .Dish a and z are doors for opening and closing the freezer compartment (5) and the refrigerator compartment (6), respectively.

Next, the heat exchanger (9) according to the present invention will be explained.

In Figure 2, House 3 has a spine fin tube (8p) made of copper and aluminum with high thermal conductivity.
A strip member ae having needle-shaped fins (15 (15...) connected thereto is spirally wound to the left around the outer periphery of a heat exchange tube a4 through which refrigerant flows. A notch is made perpendicular to the longitudinal direction, and both of the cut parts are raised up to form a U-shape.This left-handed spine fin tube a3 connects the starting end of the band member σe to the heat exchange tube ( 141, and the heat exchange tube (14t) is formed into a straight tube shape with an arbitrary pitch by rotating it in the direction of the arrow A and simultaneously moving it in the direction of the arrow at an arbitrary speed. Alternatively, instead of moving the heat exchange tube 14 in the direction of the arrow, the same result can be obtained by moving the strip of eel in the opposite direction to the direction of the arrow.

In Figure 3, housing η is a straight spine fin tube u
3'e A mandrill used as a spirally curved jig,
It has an outer diameter (dl) smaller than the inner diameter (dl) of the spine fin tube (131) by an appropriate clearance, and extends substantially linearly in the longitudinal direction, and has an extended tip (
In 17a), the curve mode corresponding to the turning diameter of the % spiral (indicated by arrow C) and the twist corresponding to pitch P (indicated by arrow 2)
is formed. This curved form is curved to the left in the same manner as the winding direction of the band 111-161. As shown in Fig. 4, the spine fin tube (13t) is inserted into this jig (L71) from the straight part of the jig. After the chain σJ is inserted, the jig C1nf is inserted at the M exit point (17b). Fix the fixing jig U to the
The jig (171) is fixed at 81. After the jig (l?) is fixed, the feeder 9 is slid along the jig (In) in the direction of the arrow small by a feeding device (not shown). Then, Spine fin tube (13 is pushed out to the front of the jig surface via the feeder (11). Spine fin tube a3
When passing through the tip (17a) of the jig η, it is bent in the left-turning direction according to the left-handed curve mode (indicated by arrow C), and at the same time, it is bent in the direction of pitch P according to the twist (indicated by arrow 2). , the desired spiral shape is obtained as shown in the fifth factor. Here, in the left-turning spine fin tube 0, since the winding direction of the band-shaped portion, H (161) and the turning direction of the spine fin tube (13) are both left-handed and the same direction, the turning direction of the spine fin tube (131) is At this time, the strip member E is further tightened around the outer periphery of the heat exchange tube 141, so that the strip portion H (Le) is crimped and fixed to the heat exchange tube (141) without using adhesive.

Figure 6 Figure 7 shows a right-turning spine fin tube (2G
I'll show you. Even in the right-handed spine fin tube (■), the winding direction of the band-shaped member - is the same as the turning direction of the chain J, which is the right-handed direction, so the band-shaped flll material c! D is crimped and fixed to the heat exchange tube (22) without using adhesive.

As shown in FIG. 8(b), left and right spiral-shaped spine fin tubes (131) are installed side by side.

Heat exchanger c for refrigerators by brazing and connecting with connectors! 4) is obtained.

(G) Effects of the Invention Since the present invention is configured as described above, when the heat exchange tube is wound spirally, the band-shaped member having continuous needle fins is further tightened around the outer periphery of the heat exchange tube. The strip member can be firmly fixed to the heat exchange tube without using adhesive.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of a refrigerator embodying the present invention, FIGS. 2 to 5 are explanatory diagrams of each manufacturing process of the left-handed spine fin tube according to the present invention, and FIGS. 6 and 7 are the same. Explanatory diagram of each manufacturing process of right-handed spine fin tube, No. 8
The figures show one embodiment of the present invention, (al is a front view, (b)
is a right side view. (14 (221... heat exchange tube, (161I2...
Band-shaped member.

Claims (1)

[Claims] 1) A band-like member with continuous needle fins is spirally wound around the outer periphery of the heat exchange tube, and the heat exchange tube is spirally wound in the same direction as the winding direction of the band-like member. heat exchanger.