WO2006098535A1

WO2006098535A1 - Heat transfer pipe structure of heat pipe heat exchanger

Info

Publication number: WO2006098535A1
Application number: PCT/KR2005/002568
Authority: WO
Inventors: Min Hyun Bae; Chi Tau Chan
Original assignee: Cti Ltd.
Priority date: 2005-03-18
Filing date: 2005-08-08
Publication date: 2006-09-21
Also published as: CN1834570A; KR200387377Y1

Abstract

This invention relates to a heat transfer pipe structure of a heat pipe heat exchanger for enhancing durability and workability by connecting with a heat pipe and extruding in an integral structure which partitions the heat transfer pipe for transferring heat by heat siphon phenomenon into a heat radiating part and a heat source part without adopting a double pipe type and for greatly economizing in manufacturing cost. To do this, there is provided a heat transfer apparatus comprising a heat source, a heat transfer pipe which is filled up with a heat medium liquid for receiving the heat from the heat source and generating the phase change, and a heat pipe which is communicated with the heat transfer pipe and has a predetermined flow path therein, wherein the heat transfer pipe (10) including: a heat source part (11) having the heat source therein to transfer heat the heat pipe (20); a heat emitting part (12) which has closed both ends and is filled up with the heat medium liquid (30) after vacuuming process, the heating emitting part (12) communicating the heat pipe (20); and an internal partition member (13) for partitioning the heat emitting pipe and the heat source part in a length direction thereof; wherein the heat emitting part and the heat source part including the partition member are integrally extruded by an extruding machine.

Description

HEAT TRANSFER PIPE STRUCTURE OF HEAT PIPE HEAT

EXCHANGER

Technical Field

[1] This invention relates to a heat transfer pipe structure of a heat pipe heat exchanger, and more particularly to a heat transfer pipe structure for enhancing durability and workability by connecting with a heat pipe and extruding in an integral structure which partitions the heat transfer pipe for transferring heat by heat siphon phenomenon into a heat radiating part and a heat source part without adopting a double pipe type and for greatly economizing in manufacturing cost.

Background Art

[2] In general, a heat pipe heat exchanger can be variously used in a wide range from high temperature to low temperature. Further, when performing air cooling and heating of a building, heat recovery in a boiler, solar collecting and so on, it has been widely used as an efficient heat transfer element.

[3] A representative heat pipe heat exchanger, as shown in Fig.l, is disclosed in Korea

Registered Utility Model No.20-231711.

[4] According to the conventional heat exchanger in Fig. 1, numerous heat emitting pipes 4 having regenerative rooms 5 are communicated to one side of an enclosed heat exchanging pipe 1. A heat transfer pipe 2 having an electric heater 2' connected to a positive wire and a negative wire at its both ends is installed in a heat exchanging room 3 within the heat exchanging pipe 1. After making the heat exchanging room 3 vacuous, a heat medium liquid 7 having a low boiling point, such as acetone and so on, is filled up into the heat exchanging pipe 1 through a filling pipe 6. Then, the heat transfer pipe 2 is heated, thereby regenerating heat steam which experiences heat exchange within the regenerative room 5.

[5] However, since the heat exchanging pipe 1 has a double piped structure, the heat transfer pipe 2 should be exactly positioned in the center of the heat exchanging pipe 1 to uniformly heat the heat exchanging pipe 1 and then should be coupled with the electric heater 2' at both sides thereof. Thus, the manufacture of the heat exchanging pipe 1 is difficult.

[6] Further, since the internal heat transfer pipe 2 and the external heat exchanging pipe

1 are made in a double piped structure and the internal heat transfer pipe 2 is supported only on both ends thereof, the other parts except for the both ends of the internal heat transfer pipe 2 has a weak structure against the external shock or crush. Thus, the durability of the pipe 2 is lower. Further, in order to replace the electric heater 2' and use the other kind of heat source, the both ends of the heat transfer pipe 2 should be disassembled and then the heat medium liquid 7 should be discharged.

[7] Further, since the heat exchanging pipe 1 and the heat transfer pipe 2 have different diameters each other, it is inevitable to increase the material and manufacturing cost. Disclosure of Invention Technical Problem

[8] It is, therefore, an object of the invention to provide a structure for a heat transfer pipe of a heat pipe heat exchanger which is connected with a heat pipe and is integrally extruded while being partitioned into a heat emitting part and a heat transferring part, thereby enhancing durability and workability and saving the manufacturing cost.

[9] Further, it is another object of the invention to provide a structure for a heat transfer pipe of a heat pipe heat exchanger for using not only a electric heater but also a heating or cooling unit by completely partitioning a heat source part which has a heat source therein and a heat emitting part which is filled with a heat medium liquid by an internal partitioning member.

Technical Solution

[10] To accomplish the above objects, there is provide a heat transfer apparatus comprising a heat source, a heat transfer pipe which is filled up with a heat medium liquid for receiving the heat from the heat source and generating the phase change, and a heat pipe which is communicated with the heat transfer pipe and has a predetermined flow path therein, wherein the heat transfer pipe including: a heat source part having the heat source therein to transfer heat the heat pipe; a heat emitting part which has closed both ends and is filled up with the heat medium liquid, the heating emitting part communicating the heat pipe; and an internal partition member for partitioning the heat emitting pipe and the heat source part in a length direction thereof; wherein the heat emitting part and the heat source part including the partition member are integrally extruded by an extruding machine. Advantageous Effects

[11] From the foregoing, since the heat emitting part and the heat source part are integrally extruded, durability and workability thereof are superior. Further, since the constitutional elements are of small number and the inventive production is easily manufactured, the manufacturing cost is considerably saved.

[12] Further, the heat source part and the heat emitting part are completely partitioned by the internal partition member. Thus, the inventive production may be utilized as it is without disassembling the both ends of the heat emitting part using various heat sources. Further, the repair or the replacement can be conveniently performed.

[13] Furthermore, since the prompt and uniform heat transfer is possible over the entire surface of the heat pipe using the heat medium liquid which has a low boiling point and performs continual phase change due to heat siphon phenomenon, the required energy is greatly saved and also the usage is possible in a wide temperature range.

Brief Description of the Drawings [14] The above and other objects and features of the invention will become apparent from the following description of preferred embodiments taken in conjunction with the accompanying drawings, in which: [15] Fig. 1 is a view for showing a structure of a heat transfer pipe of a conventional heat pipe heat exchanger; [16] Fig. 2a is a perspective view for showing a heat transfer pipe of a heat pipe heat exchanger according to the invention; [17] Fig. 2b is a sectional view for showing a heat transfer pipe of a heat pipe heat exchanger according to the invention;

[18] Figs. 3a and 3b are views for showing preferred embodiments of the invention; and

[19] Figs. 4a and 4b are sectional views for showing various structure of a heat transfer pipe of the invention.

Best Mode for Carrying Out the Invention [20] In the following, the constitution of the invention will be described in detail with reference to the accompanying drawings. [21] First, Fig. 2a is a perspective view for showing a heat transfer pipe of a heat pipe heat exchanger according to the invention, and Fig. 2b is a sectional view for showing a heat transfer pipe of a heat pipe heat exchanger according to the invention. [22] Referring to Figs. 2a and 2b, the invention discloses a heat transfer pipe 10 and a heat pipe 20 communicated with the heat transfer pipe 10. [23] The heat transfer pipe 10 includes a heat source part 11 having a heat source therein and a heat emitting part 12 filled with heat medium liquid after vacuuming process therein to generate heat siphon phenomenon from the heat pipe 20 by heat transferred from the heat source part 11. [24] Here, the heat source part 11 and the heat emitting part 12 are separated in a length direction by an internal partition member 13. [25] The heat transfer pipe 10 having the above structure is formed by extrusion molding method. That is, a superior molding material such as aluminum is contained in a container and then is extruded through a die by a high pressure. [26] Thus, since the heat source part 11 and the heat emitting part 12 of the heat transfer pipe 10 are integrally manufactured as compared with the conventional double typed pipe, durability and workability of the heat transfer pipe 10 are enhanced and also the heat transfer pipe 10 are easily manufactured. [27] The heat pipe 20 is coupled to an upper side of the heat transfer pipe 10 to be communicated with it. The heat pipe has a shape of a branch pipe which has numerous branched pipes connected from each other and a flow path within the pipe.

[28] Therefore, the branched heat pipe 20 are welded to be communicated with the heat emitting part 12 in a length direction of the heat emitting part 12 at proper positions on the heat emitting part 12 of the heat transfer pipe 10.

[29] Then, the both ends of the heat emitting part 12 are blocked to be completely sealed. A predetermined amount of the heat medium liquid 30 enters the internal space of the heat pipe 20 through a filling pipe 21 provided to one side of the heat pipe 20. As a result, the heat medium liquid 30 is accommodated within the heat emitting part 12.

[30] After filling up the heat medium liquid 30, air within the heat pipe 20 is absorbed to the outside through the filling pipe 21 so that the space within the heat pipe 20 forms a vacuum.

[31] As such, since the inventive heat transfer pipe 10 having the heat emitting part 12 filled with the heat medium liquid 30 after vacuuming process and communicated with the heat pipe 20 is completely sealed from the outside, the heat source connected to the heat source part 11 may be freely replaced or repaired.

[32] In the following, the embodiments of the invention will be described in detail with reference to Figs. 3a and 3b.

[33] First, referring to Fig. 3a, an electric heater 14 is sealed with a material having superior insulation and adiabatic property, such as thermosetting silicon or porcelain insulator. The electric heater 14 is inserted into the heat source part 11 in a length direction thereof and then is positioned in the center of the heat source part 11. One end of the heat source part 11 is blocked and then the internal space thereof forms a vacuum.

[34] At this time, preferably, one side of the electric heater 14 is fixed by a fixture 50 not to move within the heat source part 11.

[35] Then, the electric heater 14 is connected through a power source connecting part 40 to a power source. As a result, the heat source part 11 is heated.

[36] Here, the electric heater 14 may use a known sheath heater which has a coil or line shaped heat wire and a protective material having a superior heat-resisting property covered on the heat wire. The sheath heater can be worked in various shapes to correspond to the usage for a cartridge heater or a water-proof heater. Further, since it saves an installing space and has a superior safety, it is widely used.

[37] The electric heater 14 is provided with a thermostat 17 connected with a electric power source. The thermostat 17 senses whether the temperature of the electric heater 14 is normal or not. Thus, it serves to prevent a damage of the electric heater 14 and an accident such as a fire due to the damage. [38] Meanwhile, as shown in Fig. 3b, the heat source part 11 may be connected to a heating unit such as a boiler for discharging hot water or steam or a cooling unit such as a cooler for circulating refrigerant except for the electric heater 14. Thus, the heat pipe 20 may be used for heating or cooling. [39] This is accomplished by connecting a pipe line of the heating unit or the cooling unit to the both ends of the heat source part 11. That is, the heat source part 11 is positioned on the pipe line of the heating unit or the cooling unit. [40] Here, the heating unit such as a boiler or an internal combustion engine discharges hot water or steam using heat due to combustion. Further, the cooling unit such as a cooler circulates refrigerant such as Freon or ammonia. [41] As described above, the heat siphon phenomenon due to a prompt phase change of the heat medium liquid 30 between the heat transfer pipe 10 and the heat pipe 20 occurs actively by means of various heat sources. [42] The heat medium liquid 30 is a material which is easily vaporized due to a low boiling point and has a superior thermal conductivity. For example, it may be acetone, alcohol, ether, ethylene glycol and so on. It serves to promptly and uniformly transfer heat from the heat source part 11 to the heat pipe 20. [43] Figs. 4a and 4b are sectional views for showing various structure of a heat transfer pipe of the invention. [44] Referring to Fig. 4a, the heat source part 11 and the heat emitting part 12 partitioned by the internal partition member 13 are integrally formed. Here, an upper surface of the heat source part 11 may be extruded in a plain shape. [45] Thus, when welding the heat pipe made of a material such as copper alloy or stainless alloy to the upper surface of the heat emitting part 12 or when brazing the heat pipe made of an aluminum material to the heat emitting pipe, the work for connecting the heat pipe to the heat emitting pipe may be more easily performed. [46] Further, the upper surface of the heat emitting part 12, as shown in Fig. 4b, may be formed in various curve shapes. [47] Further, preferably, the internal partition member 13 may be formed in a curve shape to increase heat efficiency by providing more wide heat transferring area between the heat source part 11 and the heat emitting part 12. [48] As described above, according to the invention, it is a basic technological sprit to provide a heat transfer pipe structure for enhancing durability and workability by connecting with a heat pipe and extruding in an integral structure which partitions the heat transfer pipe for transferring heat by heat siphon phenomenon into a heat emitting part and a heat source part without adopting a double pipe type and for greatly economizing in manufacturing cost. [49] While the invention has been particularly shown and described with reference to preferred embodiments thereof, it will be understood by those skill in the art that the foregoing and other changes in form and details can be made therein without departing from the spirit and scope of the invention. Industrial Applicability

[50] From the foregoing, since the heat emitting part and the heat source part are integrally extruded, durability and workability thereof are superior. Further, since the constitutional elements are of small number and the inventive production is easily manufactured, the manufacturing cost is considerably saved.

[51] Further, the heat source part and the heat emitting part are completely partitioned by the internal partition member. Thus, the inventive production may be utilized as it is without disassembling the both ends of the heat emitting part using various heat sources. Further, the repair or the replacement can be conveniently performed.

[52] Furthermore, since the prompt and uniform heat transfer is possible over the entire surface of the heat pipe using the heat medium liquid which has a low boiling point and performs continual phase change due to heat siphon phenomenon, the required energy is greatly saved and also the usage is possible in a wide temperature range.

Claims

[1] A heat transfer apparatus comprising a heat source, a heat transfer pipe which is filled up with a heat medium liquid for receiving the heat from the heat source and generating the phase change, and a heat pipe which is communicated with the heat transfer pipe and has a predetermined flow path therein, wherein the heat transfer pipe 10 including: a heat source part 11 having the heat source therein to transfer heat the heat pipe 20; a heat emitting part 12 which has closed both ends and is filled up with the heat medium liquid 30 after vacuuming process, the heating emitting part 12 communicating the heat pipe 20; and an internal partition member 13 for partitioning the heat emitting pipe and the heat source part in a length direction thereof; wherein the heat emitting part and the heat source part including the partition member are integrally extruded by an extruding machine.