CN101000186A - High efficiency small finned shell and tube heat exchanger - Google Patents

Abstract

The invention discloses a high-efficiency small-fin shell-tube heat exchanger, which comprises a shell tube and a plurality of copper tubes arranged in the shell tube along the axial direction of the shell tube, wherein a plurality of small fins are arranged on each copper tube in the shell at intervals, each small copper tube is respectively arranged in through holes on a plurality of small fins corresponding to the small copper tubes in a penetrating way and fixedly connected with the small fins, the small fins are divided into flat fins and corrugated fins, and the small fins are also provided with punching seams, flanging holes, shutters or pockmarks. The heat exchange area can be increased, and the heat exchange efficiency can be effectively improved. At least one row of smooth copper pipes or external thread copper pipes without small fins can be arranged at the bottom of the shell pipe to increase the supercooling degree of the refrigerant.

Description

High efficiency small finned shell and tube heat exchanger

technical field

The invention relates to a heat exchanger, more specifically to a high-efficiency shell-and-tube heat exchanger with small fins that can be made into a condenser in refrigeration and air-conditioning applications.

Background technique

The traditional shell-and-tube heat exchanger is composed of two different diameter tubes, which are used in refrigeration equipment, especially refrigeration and air-conditioning units, but the structure of the traditional shell-and-tube heat exchanger is: in a A plurality of copper tubes are sheathed in the shell and tube sleeve. Since the heat exchange is performed between the outer surface of the plurality of copper tubes and the refrigerant in the shell tube, the area of heat exchange is determined by the outer surface of the plurality of copper tubes. Depending on the area, there are the following defects: the heat exchange area of a certain number of copper tubes in the shell tube is small, the heat exchange time is short, and the heat conduction efficiency is low. If the efficiency of heat exchange needs to be enhanced, more copper tubes need to be arranged in the shell tube, resulting in an excessive number of copper tubes in the shell tube, resulting in an increase in production cost, which is not conducive to cost reduction.

Contents of the invention

The object of the present invention is to overcome the above defects and provide a high-efficiency small-fin shell-and-tube heat exchanger with high heat exchange efficiency and can effectively reduce the number of copper tubes in the shell.

In order to achieve the above object, the technical solution provided by the present invention is as follows: Construct a high-efficiency small-fin shell-and-tube heat exchanger, including a shell and tube, a number of copper tubes arranged in the shell and tube along the axial direction of the shell and tube, and the Each copper tube is provided with a plurality of small fins at intervals, and each small copper tube is fixedly connected with the plurality of small fins through the through holes of the corresponding small fins. The fins are divided into flat sheets and corrugated sheets, and the small fins are also punched with seams, flanged holes, shutters or pockmarks.

The several small fins arranged on each copper tube are distributed on the outer wall of the copper tube at intervals and fixedly connected with the outer wall of the copper tube; the several small fins are stamped by metal sheet forming.

The shape of the edge of the small fin is one of the following shapes: circle, circular segment, quadrilateral or polygon.

The basic form of the small fins may be a flat sheet or a corrugated sheet.

In order to further enhance the effect of heat exchange, the small fins can be processed into punched sheets.

In order to further enhance the effect of heat exchange, the small fins can be processed into flanging holes.

In order to further enhance the effect of heat exchange, the small fins can be processed into louvers.

In order to further enhance the effect of heat exchange, the small fins can be processed into pitted sheets.

The beneficial effect of the high-efficiency small-fin shell-and-tube heat exchanger of the present invention is that, by setting several small fins at intervals on each copper tube in the housing, each small copper tube is respectively installed on the The through holes on the corresponding several small fins are fixedly connected with the several small fins. The small fins are divided into flat sheets and corrugated sheets. There are also punching and flanging holes on the small fins. , louvers or pitting, can increase the area of heat exchange, can effectively improve the efficiency of heat exchange. At least one row of several smooth copper tubes without small fins or externally threaded copper tubes can also be arranged at the bottom of the shell tube to increase the subcooling degree of the refrigerant. Thus it has the following advantages:

1. Put the small fins on the outside of all the copper tubes in the shell tube to form a copper tube bundle with small fins. On the same length of copper tubes, the heat transfer area of the copper tube bundle with small fins is larger than that of a single copper tube Much larger, that is to say, the heat exchange area is increased.

2. The small fins are placed on the outer edge of the copper tube in the shell tube to form a copper tube with small fins, which generates turbulent refrigerant flow, prolongs the heat exchange time, and improves the heat transfer efficiency.

3. For the heat exchanger with the same heat exchange area, the small finned shell and tube heat exchanger saves copper tubes compared with the traditional external threaded shell and tube heat exchanger.

4. The form of small fins can be flat or corrugated, and punching, flanging holes, pitting or louver-like slits are distributed on the small fins, which can effectively increase the heat transfer area.

5. At least one row of several smooth copper tubes without fins or externally threaded copper tubes can be arranged at the bottom of the shell tube to increase the subcooling degree of the refrigerant, thereby improving the cooling effect of the entire system.

The high-efficiency small-fin shell-and-tube heat exchanger of the present invention will be further described below in conjunction with the accompanying drawings and embodiments:

Description of drawings

Fig. 1 is the overall structural view of the high-efficiency small-fin shell-and-tube heat exchanger of the present invention;

Fig. 2 is a partial sectional view of Fig. 1;

Fig. 3 is A-A sectional view of Fig. 1;

Fig. 4 is a partially enlarged top view of the connection structure with the small copper tube when the small fins of the high-efficiency small-finned shell-and-tube heat exchanger of the present invention are corrugated sheets and punched;

Fig. 5 is a partially enlarged view of B in Fig. 4;

Fig. 6 is a partially enlarged top view of the connection structure with the small copper tube when the small fins of the high-efficiency small-finned shell-and-tube heat exchanger of the present invention are flat sheets and punched with flanging holes;

Fig. 7 is a partial cross-sectional view of the high-efficiency small-finned shell-and-tube heat exchanger of the present invention arranged with a row of several small copper tubes without small fins;

Fig. 8 is a partially enlarged view of C in Fig. 6 .

Detailed ways

The following best embodiments of the high-efficiency small-fin shell-and-tube heat exchanger of the present invention do not limit the protection scope of the present invention.

Referring to Fig. 1, Fig. 2 and Fig. 3, a high-efficiency small-finned shell-and-tube heat exchanger is provided, including a shell-tube 1, and a number of small copper tubes 9 arranged in the shell-tube 1 along the axial direction of the shell-tube 1. Each small copper tube 9 arranged at intervals in the shell tube 1 is respectively pierced through the through holes on the corresponding several small fins and fixed with the several small fins. The edge shape of the small fins 3 is One of the following shapes: circular, circular, quadrangular or polygonal, the several small fins 3 are provided with through holes corresponding to the small copper tubes 9 in turn, and each small copper tube 9 is respectively pierced on the The through holes on the corresponding several small fins 3 are fixedly connected with the several small fins 3. The small fins 3 are in the form of flat sheets or corrugated sheets. In order to further enhance the effect of heat exchange, the The flat sheet or the corrugated sheet of the small fin 3 is provided with punching, flanging through holes, louvers or pits, so that the refrigerant causes turbulent flow, prolongs the heat exchange time, and improves the heat transfer efficiency.

The several pieces of small fins 3 arranged on the small copper tube 9 are distributed on the small copper tube 9 at intervals and are fixedly connected with the small copper tube 9. The several pieces of small fins 3 are stamped from metal aluminum sheets forming.

Referring to Fig. 4 and Fig. 5, in order to further enhance the effect of heat exchange, the small fin 3 is in the form of a corrugated sheet, and a punching slot 15 is arranged on the small fin 3, and the refrigerant flows through the punching slot to cause The turbulent flow is improved, and the heat transfer efficiency is improved.

Referring to Fig. 6 and Fig. 8, in order to further enhance the effect of heat exchange, the small fin 3 is in the form of a flat sheet, and a flanging hole 8 is arranged on the small fin 3, and the refrigerant flows through the flanging hole 8 o'clock caused turbulent flow, improved heat transfer efficiency.

The small fins 3 can be processed into louvers.

Referring to Figure 7, the shape of the edge of the small fins is circular or polygonal, and at least one row of several smooth copper tubes without small fins or externally threaded copper tubes can also be arranged between the small fins and the bottom of the shell tube. The tube 14 is used to increase the subcooling degree of the refrigerant, thereby improving the cooling effect of the entire refrigeration system. The copper tube 14 can be a smooth or externally threaded copper tube.

Dimples punched out can also be provided on the small fins 3 to increase the heat exchange area.

Using the high-efficiency small-fin shell-and-tube heat exchanger of the present invention, each small copper tube 9 in the shell tube 1 is provided with a small fin 3, water flows in the small copper tube 9, and the refrigerant flows in the shell tube 1 Flow, the whole heat exchanger is made into a shell-and-tube type, water enters from the water inlet 10, and finally flows out from the water outlet 11, while the refrigerant gas enters the shell and tube 1 from the inlet 12, and finally the refrigerant flows out from the outlet 13. According to this, the cold water flows from bottom to top OK, the refrigerant goes down from top to bottom, the two form a sufficient countercurrent, and the efficiency of heat exchange is greatly improved. The number of small copper tubes 9 in the shell tube 1 is not limited, and the number of small copper tubes 9 depends on the cooling capacity.

Claims (9)

1, a kind of high efficient small fin case tube heat exchanger, comprise package, be axially disposed within some copper pipes in the package along package, it is characterized in that, be arranged at intervals with some little fins respectively on each root copper pipe in described housing, the little copper pipe of each root be located in respectively with its corresponding some little fins on through hole in fixedly connected with these some little fins.

2, high efficient small fin case tube heat exchanger according to claim 1 is characterized in that, described to be arranged on each root copper pipe some little fins be to be distributed on the lateral wall of this copper pipe and with the lateral wall of this copper pipe to fixedly connected.

3, high efficient small fin case tube heat exchanger according to claim 1 is characterized in that, the edge shape of described little fin is one of following shape: circular, circle lacks shape, quadrangle or polygon.

4, high efficient small fin case tube heat exchanger according to claim 3 is characterized in that, the form of described little fin is plain film or corrugated plate.

5, high efficient small fin case tube heat exchanger according to claim 4 is characterized in that: described little fin is the calking sheet.

6, high efficient small fin case tube heat exchanger according to claim 4 is characterized in that: described little fin is a flange hole sheet.

7, high efficient small fin case tube heat exchanger according to claim 4 is characterized in that: described little fin is a louver.

8, high efficient small fin case tube heat exchanger according to claim 4 is characterized in that, also is intervally distributed with the pit that punching press is come out on the described little fin.

9, high efficient small fin case tube heat exchanger according to claim 1 is characterized in that, can also arrange between described little fin and the package bottom that some of at least one rows are not with the smooth copper or the external screw thread copper pipe of little fin.

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