JPH0571670U - Cylindrical heat exchanger - Google Patents

Abstract

(57) [Summary] [Purpose] By winding the heat transfer tube in a compact way,
To reduce the size of the cylindrical heat exchanger container. [Structure] The heat transfer tube in the cylindrical container is half wound around the outer circumference of the upper stage, then moved to the inner circumference of the upper stage by the next half winding, then half wound at the inner circumference of the upper stage, and then the innermost part of the middle stage by the next half winding. To the inner circumference of the lower stage, then to the inner circumference of the lower stage, then to the outer circumference of the lower stage in the next half winding, and finally to the outer periphery of the lower stage. The lower stage was wound in a coil shape of two turns each. [Effect] Since the entire coil, including the pipe lead-out portion, is wound in two stages and the thickness is within 2.5 times the pipe diameter, even if it is tightly wound, it has a diameter of 3
The size can be reduced as compared with the conventional example that requires double the number.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a method of winding a heat transfer tube in a cylindrical heat exchanger.

[0002]

[Prior Art]

 Conventionally, when a heat transfer tube coil with two upper and lower stages or two windings for each of the upper and lower stages is constructed by one pipe, as shown in Fig. 3, the pipe withdrawal section will have three upper and lower stages, and at least the diameter of the pipe. 3 times the thickness is required. This is because one pipe occupies both the upper and lower stages when moving from the upper stage to the lower stage, which hinders the downsizing of equipment. Therefore, conventionally, when a flat heat exchanger with two windings each in the upper and lower stages is required, as shown in Fig. 4, a joint for distribution is used to form an inner and outer double winding coil for each one, and The connection was made outside the container.

[0003]

[Problems to be solved by the device]

 However, the conventional configuration shown in FIG. 4 has a drawback in that the number of parts, processing, and inspection man-hours are large. On the other hand, if it is configured with a single pipe as shown in FIG. 3, the thickness of the container increases and the size is reduced. There was a problem that it interfered with. An object of the present invention is to solve the above-mentioned problems and to provide a small-sized and low-cost heat exchanger that can be constructed by one pipe.

[0004]

[Means for Solving the Problems]

 In the cylindrical heat exchanger according to the present invention, as shown in FIGS. 1 and 2, the heat transfer tube in the cylindrical container is half wound around the outer circumference of the upper stage and then moved to the inner circumference of the upper stage by the next half winding. After making a half turn in the inner circumference of the upper stage, the next half turn makes it move to the innermost circumference of the middle stage, makes another half turn makes it move to the inner circumference of the lower stage, then makes a half turn in the inner circumference of the lower stage, and then makes the next half turn. The outer circumference of the lower stage is wound, and then the outer circumference of the lower stage is half-wound.

[0005]

[Action]

 According to the above-mentioned structure, compared with the case where four tubes are closely wound, the radius of the tube bundle is about R in the vertical direction and the width of the tube bundle is about 1.3R only in the front side in the radial direction. Although the thickness is large, the entire coil including the pipe lead-out portion can be stored in two stages and the thickness can be stored within 5R, so that the container can be made flatter than in the conventional case. Further, the structure of claim 2 helps to reduce the diameter of the container.

[0006]

【Example】

 1 and 2 show an embodiment of the heat exchanger according to the present invention, in which the heat transfer tube 2 introduced into the cylindrical container 1 is half-wound (A) at the outer circumference of the upper stage, and the next half-wound. In (B), it moves to the inner circumference of the upper stage, then in the inner circumference of the upper stage, it is half-wound (C), in the next half-winding (D), it moves to the innermost circumference of the middle stage, and in the next half-winding (E). It moves to the inner circumference of the lower stage, then half-winding (F) in the inner circumference of the lower stage, then to the outer circumference of the lower stage in the next half-winding (G), and finally half-winding (H) in the outer circumference of the lower stage. A two-turn coil is constructed. Both ends of the heat transfer tube 2 are bent and drawn out of the container 1 as pipe drawing portions 2a and 2b. In this example, the shape of the container 1 is formed in a cylindrical shell shape, and in order to make the diameter of the inner cylinder of the container 1 as large as possible, in accordance with the innermost peripheral portion (D and E), The center P of the outer diameter of the coil is slightly displaced from the center Q of the container 1 toward the pipe lead-out portions 2a and 2b. In the vertical cross-sectional view of FIG. 2, numbers 1 to 3 are numbered in the order of the paths of the heat transfer tubes 2.

[0007]

[Effect of the device]

 As described above, in the cylindrical heat exchanger according to the present invention, the entire coil including the pipe lead-out portions 2a and 2b can be housed in two stages, and at the same time, the thickness thereof can be housed within 2.5 times the diameter, so that it is smaller than the conventional one. This has the advantage that the container 1 can be made flat, and especially when it is necessary to provide a certain gap between the pipes in order to improve the heat exchange efficiency, in the present proposal, a gap about the radius of the pipe is already formed. Therefore, the effect of further miniaturization can be achieved.

[Brief description of drawings]

FIG. 1 is a top view of an embodiment of the present invention.

FIG. 2 is a side view of the above.

FIG. 3 is a side view of a conventional example.

FIG. 4 is a top view of another conventional example.

[Explanation of symbols]

 1 Container 2 Heat Transfer Tubes 2a, 2b Pipe Drawer

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Creator Hideki Tani 4-1-2, Hiranocho, Chuo-ku, Osaka City Osaka Gas Co., Ltd.

Claims (2)

[Scope of utility model registration request] 1. A heat transfer tube in a cylindrical container is wound half way around the outer circumference of the upper stage, then moved to the inner circumference of the upper stage at the next half winding, then half-turned at the inner circumference of the upper stage, and then at the middle stage at the next half winding. Move to the innermost circumference, then move to the lower inner circumference with the next half winding, then half-wind with the lower inner circumference, then move to the lower outer circumference with the next half winding, and finally half-wind with the lower outer circumference. , Upper and lower 2 each
A cylindrical heat exchanger that is wound into a wound coil. 2. A cylindrical heat exchanger in which a container is formed into a cylindrical shell shape, and the coil is mounted such that the center of the outer diameter of the coil is slightly displaced from the center of the container toward the pipe drawing portion.