CN100362305C

CN100362305C - Return pipe heat exchanger

Info

Publication number: CN100362305C
Application number: CNB2005100317845A
Authority: CN
Inventors: 彭建华
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-07-01
Filing date: 2005-07-01
Publication date: 2008-01-16
Anticipated expiration: 2025-07-01
Also published as: CN1719177A

Abstract

The present invention discloses a heat exchanger with return pipes, which is suitable for medium and small water cooling air conditioners, water source heat pumps, domestic central air conditioners, air source heat pump water heaters, etc. and is used as condensers and evaporators. An outer casing of the heat exchanger is formed by combining 1 to 12 straight cylindrical bodies and end covers, wherein 1 to 8 similar clip-shaped heat exchange pipes, namely the return pipes are contained in each cylindrical body; the pipe heads of the return pipes in the cylindrical bodies thread out of cover plates of the end covers; the adjacent first and last pipe heads of same groups of the return pipes are communicated by connecting bends; the inlet ends and the outlet ends of each group of the return pipes are respectively connected into a main pipe by distributors; the space in each return pipes is a flow path of a heat transfer medium; the interlayer space outside the return pipes in the outer casing of the heat exchanger is a flow path of the other heat transfer medium; the two flow paths carry out heat transfer by the pipe walls of the return pipes. The present invention has the advantages of compact structure, small volume, simple production technology, low cost, reliable quality, less failure, high reliability and little possibility of filth blockage, can be horizontally laid, can also be sidewise laid, and is very convenient for arrangement by air conditioner designers.

Description

Heat exchanger with return pipe

Technical field

The present invention relates to a kind of heat exchanger with return pipe that is applicable to middle-size and small-size water-cooling air conditioner, water resource heat pump, residential central air conditioning and air source hot pump water heater etc. as condenser and evaporimeter use.

Background technology

Be currently available for that the heat exchanger as heat-exchange device has only plate type heat exchanger, shell and tube exchanger and three kinds of citation forms of double pipe heat exchanger between liquid phase or gas-liquid two-phase fluid.Return pipe in the case tube heat exchanger is common straight tube or U type pipe, and heat exchanger inside is provided with the floor of branch water; Only be applicable to the occasion of big heat flow, the heat exchanger that is fit to medium and small heat flow only has double-tube heat exchanger and plate type heat exchanger.Plate type heat exchanger compact conformation, efficient height, but cost an arm and a leg, fault is many, and generally can only vertically install, and is not suitable for some to using under the occasion that specific (special) requirements is highly arranged; Though the double-tube heat exchanger low price, its appearance and size is big, uses very inconvenient.

Summary of the invention

The object of the present invention is to provide a kind of compact conformation, volume little, but the low discharge heat exchanger with return pipe that low price and various ways are installed.

Technical scheme of the present invention is: comprise the shell that cylindrical shell and end cap constitute, flow hole above the end cap, distributor, it is characterized in that the quantity of cylindrical shell is 1-12, comprises 1-8 root return pipe in each cylindrical shell, described return pipe is meant back and forth the heat exchanger tube around the paper clip shape of 2-8 circle, return pipe tube head in the cylindrical shell passes from the end cap cover plate, and the adjacent head and the tail tube head in the same flow process is connected by connecting bend, and the in-out end of the return pipe of different flow processs is connected to a house steward by distributor respectively.

Have intercommunicating pore between the block set of adjacent end cap, make whole connections of all cylindrical shells and formation series relationship in the heat exchanger.

Described return pipe is meant back and forth the metal tube around the paper clip shape of 2-8 circle, and its two is that the U type is curved, and the centre is straight tube or the straight tube that reverses certain angle.Return pipe can be formed by a complete metallic copper canal curvature, also can be by straight tube and U type elbow through being made of welded connection.

For enhanced heat exchange, the return pipe bundle can also be reversed into twisted shape, allow the oblique copper pipe that skims over of current, further strengthen the heat transfer of current one side,

End cap is made of as a whole cover plate and block set, the quantity of block set is identical with cylindrical shell quantity on end cap, and block set arrangement mode on the cover board is identical with the cylindrical shell arrangement mode.Between the adjacent block set, press the heat exchanger shell pass fluid flow path, have intercommunicating pore, and be interconnected, make whole connections of all cylindrical shells and formation series relationship in the heat exchanger.

2 flow holes can be driveed in the end cap of the left and right sides on any one, or respectively open one on the end cap of the left and right sides.

Distributor can adopt the pectination distributor, can also select the pyramid type distributor for use.

Cylindrical shell is the long and thin metal tube, and different cylindrical shell numbers can be arranged to different arrangement modes.When being 2, then be arranged side by side as the quantity of cylindrical shell; When the quantity of cylindrical shell is 3, then arranged in a straight line side by side; When the quantity of cylindrical shell is 4, then arranged in a straight line side by side or form 2 * 2 square matrix and arrange; When the quantity of cylindrical shell is 6, form 2 * 3 rectangular matrix arrangement; When the quantity of cylindrical shell is 8, form 2 * 4 rectangular matrix arrangement; When the quantity of cylindrical shell is 10, form 2 * 5 rectangular matrix arrangement; When the quantity of cylindrical shell is 12, form 2 * 6 rectangular matrix arrangement.The even numbers that adopt are arranged side by side more in the real work.

The outer interlayer space of outer cover of heat exchanger internal pore of the present invention and return pipe pipe is the runner of one road heat transfer medium, and the inner space of return pipe is the runner of another road heat transfer medium.Shell side and tube side two-way fluid carry out heat exchange by the tube wall of return pipe.

This heat exchanger with return pipe has the following advantages:

1, compact conformation, volume are little: its volume only is 1/5 of an identical heat exchange amount double pipe heat exchanger.

2, production technology is simple, and cost is low.

4, reliable in quality, fault are few: similar package of the structure of heat exchanger with return pipe and double pipe heat exchanger, therefore, it has the high advantage of reliability equally.In heat exchanger with return pipe, the plumbers shed space is evenly distributed simultaneously, therefore also is not easy to take place as board-like and sleeve pipe dirty stifled.

5, heat exchanger can constitute various forms, can crouch to put, and also can be sidelong, and very convenient Air-conditioner design person arranges.

The present invention is specially adapted to middle-size and small-size water-cooling air conditioner, water resource heat pump, residential central air conditioning and air source hot pump water heater etc. and uses as condenser and evaporimeter.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 bends the moulding return pipe for integral body;

Fig. 3 is a circular cylinder body;

Fig. 4 is a bitubular heat exchanger with return pipe left end cap front view;

Fig. 5 is a bitubular heat exchanger with return pipe left end cap side view;

Fig. 6 is a bitubular heat exchanger with return pipe right end cap cutaway view;

Fig. 7 is the mid section figure of bitubular heat exchanger with return pipe;

Fig. 8 is the connecting bend of bitubular heat exchanger with return pipe;

Fig. 9 is 4 (arrangement of 2 * 2 matrixes) heat exchanger with return pipe left end cap schematic diagrames;

Figure 10 is side diagrammatic sketch of right end cap of 4 (arrangement of 2 * 2 matrixes) heat exchanger with return pipe;

Figure 11 is another side diagrammatic sketch of right end cap of 4 (arrangement of 2 * 2 matrixes) heat exchanger with return pipe;

Figure 12 is the pectination distributor;

Figure 13 is a kind of conical distributor.

The specific embodiment

Embodiment 1: bitubular heat exchanger with return pipe

In conjunction with Fig. 1-Fig. 3:

Present embodiment is provided with two cylindrical shells 2, and cylindrical shell is the long and thin metal tube, has three in each cylindrical shell 2 back and forth around 2 return pipes 1 that enclose.The return pipe 1 of present embodiment bends moulding for integral body.Two cylindrical shells 2 insert in the groove of two block sets 12 of left end caps 4 and right end cap 3, have constituted the shell of heat exchanger, and import 10 is arranged above the end cap, outlet 9, and the tube head of totally 12 return pipes passes from the cover plate 11 of left end cap 4.The adjacent head and the tail tube head of return pipe is connected by connecting bend 5 on the same group, each in-out end of organizing return pipe is connected to a house steward by last distributor 6 and following distributor 7 respectively, have intercommunicating pore 8 between the adjacent block set, interior all cylindrical shells of heat exchanger all are communicated with, and form the relation of series connection.

In conjunction with Fig. 4-Fig. 8: right end cap and left end cap constitute an integral body by cover plate 11 and block set 12, and the quantity of block set 12 is identical with cylindrical shell quantity on end cap, is 2.

During work, the shell side heat transferring medium enters heat exchanger from the import 10 of shell termination, flows in the space between return pipe and shell, and the tube side heat transferring medium enters from the main entrance end distributor 6 of return pipe, flows in return pipe.The two-way fluid carries out heat exchange by the tube wall of return pipe, and after heat exchange was finished, shell-side fluid went out heat exchanger from exporting 9, and tube side fluid is pooled to distributor 7 from each road return pipe, goes out heat exchanger.

For the situation of tube side heat exchanging fluid more than 1 tunnel, can be as required install distributor additional at the entrance end of return pipe.

Embodiment 2:4 tube (arrangement of 2 * 2 matrixes) heat exchanger with return pipe

In conjunction with Fig. 9-Figure 11:

As different from Example 1: 6 groups of return pipes 1 place respectively in 4 cylindrical shells 2, constitute (arrangement of 2 * 2 matrixes), and the quantity of block set 12 is identical with cylindrical shell quantity, is 4.

Claims

1. heat exchanger with return pipe, comprise the shell that cylindrical shell and end cap constitute, flow hole above the end cap, distributor is characterized in that, the quantity of cylindrical shell is 1-12, comprise 1-8 root return pipe in each cylindrical shell, described return pipe is meant that back and forth the return pipe tube head in the cylindrical shell passes around the heat exchanger tube of the paper clip shape of 2-8 circle from the end cap cover plate, adjacent head and the tail tube head in the same flow process is connected by connecting bend, and the in-out end of the return pipe of different flow processs is connected to a house steward by distributor respectively.

2. heat exchanger according to claim 1 is characterized in that return pipe two is that the U type is curved, and the centre is straight tube or the straight tube that reverses certain angle.

3. heat exchanger according to claim 1 is characterized in that return pipe is formed by a complete metal tube bending.

4. heat exchanger according to claim 1, it is characterized in that return pipe by straight tube and U type elbow through being made of welded connection.

5. heat exchanger according to claim 1 is characterized in that the return pipe bundle is reversed into twisted shape.

6. heat exchanger according to claim 1 is characterized in that end cap constitutes an integral body by cover plate and block set, and the quantity of block set is identical with cylindrical shell quantity on end cap, and block set arrangement mode on the cover board is identical with the cylindrical shell arrangement mode.

7. heat exchanger according to claim 7 is characterized in that pressing the heat exchanger shell pass fluid flow path between the adjacent block set, has intercommunicating pore, and is interconnected, and makes the relation of all cylindrical shells formation series connection in the heat exchanger.

8. heat exchanger according to claim 1 is characterized in that 2 flow holes can drive in the end cap of the left and right sides on any one, or respectively opens one on the end cap of the left and right sides.