KR101661954B1 - Heat exchanger - Google Patents

Abstract

The heat exchanger of the present invention comprises: a shell having a space formed therein; A first fluid inlet pipe through which the first fluid flows into the space; A spiral tube portion in which a plurality of turns having a distance from the central axis passing through the second fluid to be heat-exchanged with the first fluid are spirally and continuously wound; And a first fluid discharge pipe through which the first fluid in the space is discharged to the outside of the shell, wherein a plurality of the spiral tube portions are arranged so as to be spaced apart from each other in a direction orthogonal to the central axis, The thermal efficiency can be improved by uniformly exchanging the first fluid with all of the plurality of the spiral tube portions, and the first fluid can flow between the spiral tube portion closest to the inner wall of the shell and the shell, There is an advantage that excessive bypassing can be prevented.

Description

Heat exchanger

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger, and more particularly, to a heat exchanger in which a plurality of turns of a spiral tube are continuously wound in a shell.

Generally, a heat exchanger is a device for moving heat between two fluids, and is widely used for cooling, heating, and hot water supply.

The heat exchanger functions as a waste heat recovering heat exchanger for recovering the waste heat or as a cooler for cooling the hot fluid or as a condenser for condensing the vapor or as an evaporator for evaporating the coolant fluid .

Various types of heat exchangers may be used, including a tube through which the first fluid passes, a finned tube heat exchanger with the fin provided on the tube, a shell through which the first fluid passes, and a second fluid through which heat exchange with the first fluid passes A dual tube heat exchanger having an inner tube through which the first fluid passes and a second fluid that undergoes heat exchange with the first fluid and surrounds the inner tube and has an outer tube; And a plate heat exchanger in which the fluid passes through the heat transfer plate.

 The shell-type heat exchanger of the heat exchanger can be formed in a spiral shape, and the spiral tube can heat-exchange the first fluid and the second fluid inside the shell. The first fluid can flow into the shell and pass through the shell to heat or cool the second fluid, and the second fluid can exchange heat with the first fluid as it passes through the tube.

KR 10-0353334 B1 (2003.02.07)

 The heat exchanger according to the related art is arranged such that a plurality of coils wound in a clockwise or counterclockwise direction are vertically spaced apart from the outermost coil winding of the helical coil and the innermost coil winding and each of the plurality of coils is disposed in the intake manifold and the exhaust manifold There is a problem in that the structure is complicated and a spacer bar for maintaining the coil turn which can increase the heat transfer efficiency is additionally installed, so that the number of parts is large and the structure is complicated.

According to an aspect of the present invention, there is provided a heat exchanger including: a shell having a space therein; A first fluid inlet pipe through which the first fluid flows into the space; A spiral tube portion having a plurality of spirals continuously passing through a plurality of turns through which a second fluid to be heat-exchanged with the first fluid passes and a distance from the central axis is the same; And a first fluid discharge pipe through which the first fluid in the space is discharged to the outside of the shell, wherein a plurality of the spiral tube portions are spaced apart in a direction orthogonal to the central axis, .

[Formula 1]

P = L x C

Here, P is an interval between the plurality of helical tube portions, L is a distance between the helical tube portion closest to the inner wall of the shell and the inner wall of the shell, and C is a value of one of 1.5 to 2.5.

The plurality of spiral tube portions may be arranged such that the central axes thereof are perpendicular to each other.

The plurality of spiral tube portions may have different distances from the central axis.

The plurality of helical tubular sections may be spaced equidistantly.

A spiral tube portion having a distance from the central axis of the plurality of spiral tube portions may be in contact with the first fluid discharge tube and a spiral tube portion of the plurality of spiral tube portions, Can be spaced apart.

The first fluid inlet pipe may face at least one of the plurality of spiral pipe sections at an outlet end from which the first fluid is discharged.

The plurality of spiral tube portions may be connected to each other by a single connection tube.

The straight pipe portion may be extended to the helical pipe portion, and the straight pipe portion may be fixed to the shell.

The shell has a vertically long case; A top cover coupled to an upper portion of the case; And a lower cover coupled with a lower portion of the case.

The plurality of spirals can be spaced apart in the radial direction of the case.

The present invention can improve the thermal efficiency of a plurality of spiral tube portions with a small number of parts and a simple structure and can prevent the first fluid from being excessively bypassed between the spiral tube portion closest to the inner wall of the shell and the shell There is an advantage.

FIG. 1 is a schematic view of an air conditioner to which a heat exchanger according to an embodiment of the present invention is applied.
FIG. 2 is a side view of an embodiment of a heat exchanger according to the present invention,
Fig. 3 is a bottom view of the shell shown in Fig. 2,
Figure 4 is a view of the interior of one embodiment of a heat exchanger according to the present invention,
FIG. 5 is a side view showing a spiral tube portion of a heat exchanger according to an embodiment of the present invention,
6 is a cross-sectional view of one embodiment of a heat exchanger according to the present invention,
FIG. 7 is a plan view showing the inside of a heat exchanger according to an embodiment of the present invention,
8 is a graph showing a heat transfer amount according to a distance between a plurality of helical tube portions in an embodiment of the heat exchanger according to the present invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of an air conditioner to which a heat exchanger according to an embodiment of the present invention is applied.

The air conditioner shown in Fig. 1 may include a compressor 2, a first heat exchanger 4, an expansion mechanism 6, and a second heat exchanger 8. [ The first heat exchanger 4 can heat-exchange the first fluid and the second fluid. The first fluid may function as a cooling fluid that absorbs heat of the second fluid or may function as a heating fluid that applies heat to the second fluid. The air conditioner includes a compressor (2) in which a second fluid is compressed, a first heat exchanger (4) in which the second fluid is heat-exchanged with the first fluid, an expansion mechanism (6) And a second heat exchanger (8) for heat exchange with air.

The second fluid can pass through the compressor 2, the first heat exchanger 4, the expansion mechanism 6 and the second heat exchanger 8 in this order. That is, the second fluid compressed by the compressor 2 is passed through the first heat exchanger 4, the expansion mechanism 6, and the second heat exchanger 8 in sequence, and is then recovered to the compressor 2 . In this case, the first heat exchanger 4 may function as a condenser for condensing the second fluid and the second heat exchanger 8 may function as an evaporator for evaporating the second fluid, 2) that absorbs the heat of the second fluid that has been compressed.

The second fluid can pass through the compressor 2, the second heat exchanger 8, the expansion mechanism 6 and the first heat exchanger 4 in this order. That is, the second fluid compressed by the compressor 2 is passed through the second heat exchanger 8, the expansion mechanism 6, and the first heat exchanger 4 in sequence, and is recovered to the compressor 2 . In this case, the second heat exchanger 8 may function as a condenser for condensing the second fluid, and the first heat exchanger 4 may function as an evaporator for evaporating the second fluid, Can be heated by the second fluid passing through the heat exchanger (4).

The air conditioner includes a compressor (2) in which a second fluid is compressed, a first heat exchanger (4) in which the second fluid is heat-exchanged with the first fluid, an expansion mechanism (6) (8) for exchanging heat with the room air and a flow switching valve (7) for sending the second fluid compressed by the compressor (2) to the first heat exchanger (4) or the second heat exchanger (8) Not shown) may be further included. The air conditioner is configured such that the second fluid compressed in the compressor 2 passes through the flow path switching valve, the first heat exchanger 4, the expansion mechanism 6, the second heat exchanger 8 and the flow path switching valve sequentially And then recovered to the compressor (2). The air conditioner is configured such that the second fluid compressed in the compressor 2 is supplied to the first heat exchanger 4 and the second heat exchanger 4 through a flow path switching valve (not shown), a second heat exchanger 8, an expansion mechanism 6, And a second circulation circuit which is sequentially recovered by the compressor 2 after passing through the first circulation circuit. The first circulation circuit can be a circuit in the cooling operation in which the room is cooled by the second heat exchanger 8. The first heat exchanger 4 can function as a condenser for condensing the second fluid, 2 heat exchanger 8 may function as an evaporator for evaporating the second fluid. The second circulation circuit can be a circuit in a heating operation in which the room is heated by the second heat exchanger 8 and the second heat exchanger 8 can function as a condenser for condensing the second fluid, 1 heat exchanger 4 can function as an evaporator for evaporating the second fluid.

 The first fluid may be composed of a liquid fluid such as water or an antifreeze, and the second fluid may be composed of various refrigerants such as a freon refrigerant and a carbon dioxide refrigerant, which are typically used in an air conditioner.

The compressor (2) may be composed of various compressors for compressing the second fluid, which is a refrigerant, and may be various compressors such as a rotary compressor, a scroll compressor, a screw compressor and the like. The compressor (2) may be connected to the first heat exchanger (4) and the compressor outlet flow path (3).

The first heat exchanger (4) may be constituted by a shell tubular heat exchanger. The first heat exchanger 4 may include a shell through which a first fluid such as water or an antifreeze passes, and a tube through which a second fluid as a refrigerant passes. The first heat exchanger (4) may be connected to the expansion mechanism (6) and the first heat exchanger expansion device connection flow path (5). The first heat exchanger 4 will be described later in detail.

The expansion mechanism (6) may be a capillary tube or an electronic expansion valve in which a second fluid as a refrigerant is expanded. The expansion mechanism (6) may be connected to the second heat exchanger (8) and the expansion mechanism second heat exchanger connecting flow path (7).

The second heat exchanger 8 may be a fin-tube heat exchanger or a coil-type heat exchanger through which the second fluid as a refrigerant passes. The second heat exchanger 8 may include a tube that exchanges heat with indoor air while passing a second fluid as a refrigerant. The second heat exchanger 8 may further include a fin which is a heat transfer member coupled with the tube. The second heat exchanger (8) can be connected to the compressor (2) and the compressor suction passage (9).

The air conditioner may include a heat treatment unit (10) connected to the first heat exchanger (4). The heat treatment unit 10 may be configured as a cooler for cooling the first fluid when the first heat exchanger 4 functions as a condenser for condensing the second fluid. The heat treatment unit 10 may be constituted by a heater for heating the first fluid when the first heat exchanger 4 functions as an evaporator for evaporating the second fluid. When the heat treatment unit 10 is configured as a cooler, the heat treatment unit 10 may include a cooling tower for cooling the first fluid. The first fluid may be cooling water such as water or an antifreeze and the heat treatment unit 10 may be connected to the first heat exchanger 4 and the water pipes 12 and 14. [ The first heat exchanger 4 can be connected to the heat treatment unit 10 and the outflow pipe 12 and the first fluid of the first heat exchanger 4 can be connected to the heat treatment unit 10 through the outflow pipe 12 . The first heat exchanger 4 may be connected to the heat treatment unit 10 and the inlet pipe 14 and the first fluid of the heat treatment unit 10 may be connected to the first heat exchanger 4 via the inlet pipe 14, . A circulation mechanism such as a pump for circulating the first fluid to the heat treatment unit 10 and the first heat exchanger 4 may be installed in at least one of the heat treatment unit 10, the outflow pipe 12 and the intake pipe 14 have.

The air conditioner may further include an indoor fan (16) for circulating air in the room to the second heat exchanger (8) and then discharging the air to the room again.

The compressor 2, the first heat exchanger 4, the expansion mechanism 6, the second heat exchanger 8, and the indoor fan 16 can be installed in one air conditioning unit, To the second heat exchanger (8), and then discharged back to the room through a duct or the like to cool or heat the room. The heat treatment unit 10 may be installed in addition to one air conditioning unit and may be connected to one air conditioning unit by water pipes 12 and 14. [

The compressor 2, the first heat exchanger 4, the expansion mechanism 6, the second heat exchanger 8 and the indoor fan 16 may be installed in a distributed manner in a plurality of air conditioning units I . The first heat exchanger 4 and the indoor fan 16 can be installed together in the indoor unit I and the compressor 2 and the first heat exchanger 4 can be installed together in the compression unit O Can be installed. The expansion mechanism (6) may be installed in at least one of the indoor unit (I) and the compression unit (O). The expansion mechanism (6) can be provided with one expansion mechanism in the indoor unit (I) or the compression unit (O). It is possible that a plurality of expansion mechanisms 6 may be provided, the first expansion mechanism may be installed in the indoor unit I, and the second expansion mechanism may be installed in the compression unit O. The first expansion mechanism may function as an outdoor expansion mechanism which is installed closer to the first heat exchanger (4) of the first heat exchanger (4) and the second heat exchanger (8). The second expansion mechanism can function as an indoor expansion mechanism that is installed closer to the first heat exchanger (4) and the second heat exchanger (8) of the second heat exchanger (8). The indoor unit (I) can be installed in a room to be cooled or heated. The compression unit (O) may be installed in a machine room, a basement or the like of a building or on the roof. The compression unit (O) can be connected to the heat treatment unit (10) by the water pipes (12) and (14).

Hereinafter, the first heat exchanger 4 will be referred to as a heat exchanger.

FIG. 3 is a bottom view of the shell shown in FIG. 2, FIG. 4 is a view illustrating the interior of a heat exchanger according to an embodiment of the present invention, and FIG. 6 is a cross-sectional view of one embodiment of a heat exchanger according to the present invention, and FIG. 7 is a cross-sectional view of a heat exchanger according to an embodiment of the present invention, Fig.

The heat exchanger (4) comprises a shell (20) having a space (18) formed therein; A first fluid inlet pipe (30) for introducing the first fluid into the space (18); A first fluid discharge pipe (40) through which the first fluid in the space (18) is discharged to the outside of the shell (20); A plurality of turns 71 and 72 having the same distance from the center axis VX as the second fluid to be heat-exchanged with the first fluid pass through are spirally and continuously wound around the spiral tube portions 74, 75, 76 and 77 ).

The spiral tube portions 74, 75, 76, and 77 may constitute a single spiral tube portion of the plurality of turns 71 and 72. The spiral tube portions 74, 75, 76, and 77 may be formed with a gap 73 through which the first fluid can pass between the adjacent turn 71 and the turn 72. The spiral tube portions 74, 75, 76, and 77 may have at least 10 turns. The spiral tube portions 74, 75, 76, and 77 may be wound continuously in the clockwise direction or continuously in the counterclockwise direction. The plurality of turns (71) and (72) can be wound to be spaced apart in the vertical direction, and a gap (73) can be formed between the plurality of turns (71) and (72). The first fluid passes through the gap 73 and flows into the inner space of the spiral tube portions 74, 75, 76 and 77 or flows into the space inside the spiral tube portions 74, 75, 76 and 77 73 and may flow between the shell 20 and the spiral tube portions 74, 75, 76, 77. The straight pipe portions 81, 82, 83, and 84 may be extended to the spiral pipe portions 74, 75, 76, The straight pipe portions 81, 82, 83 and 84 may be formed by bending at the lowermost turn among the spiral pipe portions 74, 75, 76 and 77. The straight pipe portions 81, 82, 83 and 84 may be formed by bending in a turn located on the uppermost one of the spiral pipe portions 74, 75, 76 and 77. The straight pipe portions 81, 82, 83, and 84 may be disposed parallel to the central axis VX. The heat exchanger 4 may have one straight tube portion extending in one helical tube portion and one helical tube portion and one straight tube portion may constitute one tube 86, 87, 88 and 89 . The straight pipe portions 81, 82, 83 and 84 can penetrate through the shell 20 and can be fixed to the shell 20. The tubes 86, 87, 88 and 89 can be supported by fixing the straight pipe portions 81, 82, 83 and 84 to the shell 20.

The shell 20 includes a case 21 which is long in the vertical direction; A top cover 22 coupled with an upper portion of the case 21; And a lower cover 23 coupled with a lower portion of the case 21. [

The case 21 is not formed integrally with at least one of the top cover 22 and the row cover 23 but is formed separately from the top cover 22 and the row cover 23 and then the top cover 22 and the row cover 23, (Not shown). The inner surface of the case 21 and the bottom surface of the top cover 22 and the top surface of the lower cover 23 can be easily painted when the case 21, the top cover 22, . When the case 21 is integrally formed with one of the top cover 22 and the low cover 23, the coating fluid may not easily flow uniformly over the entire inner wall of the case 21. [ On the other hand, when the case 21 is constructed separately from the top cover 22 and the row cover 23, the coating fluid can be painted while the entire inner wall of the case 21 is uniformly flowing. The shell 20 is attached to the case 21 and the top cover 22 and the row cover 23 after the inner circumferential surface of the case 21, the bottom surface of the top cover 22 and the top surface of the row cover 23 are painted, Lt; / RTI >

The case 21 includes a hollow cylinder 21a in which a space 18 is formed, a first engaging portion 21b engaged with the top cover 22 and a second engaging portion 21c engaged with the low cover 23 21c.

The hollow cylinder 21a may be formed in a hollow cylindrical shape.

The first coupling portion 21b may protrude from the upper end of the hollow cylinder 21a in a flange shape and may be formed with a coupling hole to be coupled to the top cover 22 by a coupling member 22a such as a bolt.

The second engaging portion 21c may protrude in a flange shape at the lower end of the hollow cylinder 21a and may be formed with a fastening hole to be fastened with the fastening member 23a such as a bolt or the like.

The top cover 22 may be formed of a plate, and may be formed in a disc shape. The top cover 22 is formed with a fastening hole corresponding to the fastening hole of the first fastening portion 21b and can be coupled with the first fastening portion 21b by a fastening member 22a such as a bolt.

 The row cover 23 may be formed as a plate and may be formed in a disc shape. The lower cover 23 is formed with a coupling hole corresponding to the coupling hole of the second coupling portion 21c and can be coupled to the second coupling portion 21c by a coupling member 23a such as a bolt.

The first fluid may flow into the space 18 through the first fluid inlet pipe 30. The first fluid can be heat exchanged with the spiral tube portions 74, 75, 76, 77 while flowing in the space 18. [

The shell 20 may be formed with a first fluid inflow conduit 24 through which the first fluid inflow conduit 30 passes. The shell 20 may be provided with a first fluid discharge pipe through-hole 25 through which the first fluid discharge pipe 40 passes. The shell 20 may be provided with tube through holes 26, 27, 28, and 29 through which the tubes 86, 87, 88, and 89 pass. The number of the tube through holes 26, 27, 28 and 29 may be the same as the number of the tubes 86, 87, 88 and 89. Tubes 86, 87, 88 and 89 may be positioned such that the spiral tubular portions 74, 75, 76 and 77 are located in the space 18 and the straight tubular portions 81, (84) can penetrate the tube through holes (26) (27) (28) (29).

The first fluid inlet pipe 30 may pass through the shell 20 such that the outlet end 32 from which the first fluid exits the first fluid outlet pipe 40 is located within the shell 20. [ The first fluid introduced into the shell 20 through the first fluid inlet pipe 30 can be choked from the lower inner side of the shell 20. The first fluid inlet pipe 30 may be disposed such that the outlet end 32 from which the first fluid exits is located at an inner lower portion of the shell 20. The first fluid inlet pipe 30 may be connected to the water inlet pipe 14 shown in FIG. 1 at a portion of the first fluid inlet pipe 30 located outside the shell 20. The first fluid inflow conduit 30 may have an outlet end 32 through which the first fluid exits and may face at least one of the plurality of spiral conduits 74, 75, 76,

The first fluid discharge tube 40 may penetrate the shell 20 such that an inlet end 42 into which the first fluid enters the first fluid discharge tube 40 is located inside the shell 20. [ The first fluid discharge pipe 40 is formed such that the first fluid located in the inner lower portion of the shell 20 is not discharged through the first fluid discharge pipe 40, 1 < / RTI > fluid discharge pipe 40, as shown in FIG. The first fluid discharge pipe (40) may be disposed such that an inlet end (42) into which the first fluid enters is positioned at the upper inside of the shell (20). The first fluid discharge pipe 40 may be connected to the outflow pipe 12 shown in FIG. 1 at a portion of the first fluid discharge pipe 40 located outside the shell 20.

The first fluid inlet pipe 30 and the first fluid outlet pipe 40 may be disposed to pass through one of the case 21, the top cover 22 and the row cover 23. The tubes 86, 87, 88 and 89 may be arranged to pass through one of the case 21, the top cover 22 and the row cover 23. When the first fluid inflow pipe 30 and the first fluid inflow pipe 40 and the tubes 86, 87, 88 and 89 are arranged to pass through the row cover 23, the heat exchanger 4 is cleaned The work may be easy. The heat exchanger 4 has a structure in which the first fluid inlet pipe 30 and the first fluid outlet pipe 40 and the tubes 86, 87, 88 and 89 are fixed to the row cover 23, 22 can be separated from the case 21 and the case 21 can be separated from the row cover 23. The top cover 2 and the case 21 are separated and the first fluid inlet pipe 30 and the first fluid outlet pipes 40, 86, 87, 88 and 89 are connected to the lower cover 23 The operator can easily clean the heat exchanger 4 in a fixed state. The first fluid inflow pipe 30 and the first fluid inflow pipe 40 and the tubes 86, 87, 88 and 89 penetrate the lower cover 23 when considering the cleanability of the heat exchanger 4. [ .

 The heat exchanger (4) may include a pedestal (50) for supporting the shell (20). The pedestal 50 may include a fastening portion 52 to which the shell 20 is fastened. The fastening portions 52 may be formed in the shape of a plate, and may be disposed horizontally. The shell 20 can be lifted up to the fastening portion 52 and can be coupled to the fastening portion 52 with a fastening member 23a such as a bolt. The pedestal 50 may include a support for supporting the fastening portion 32. The support may include a plurality of legs (57) and (58) that support the fastening portion (52). When the heat exchanger 4 is put on the fastening portion 52, a part of the first fluid inflow pipe 30, a part of the first fluid discharge pipe 40 and the tubes 86, 87, 88, May be located below the fastening plate (52). The heat exchanger 4 may extend both the first fluid discharge pipe 30 and the second fluid discharge pipe 40 and the tubes 86, 87, 88 and 89 to the lower portion of the shell 20.

The plurality of helical tube portions 74, 75, 76, and 77 may be spaced apart from each other in a direction orthogonal to the central axis VX. At least two helical tube portions 74, 75, 76, and 77 may be provided inside the shell 20. The plurality of spiral tube portions 74, 75, 76, 77 may be connected to the connection tubes 78, 79. The plurality of spiral tube portions 74, 75, 76, and 77 may be connected to one spiral tube portion by two spiral tube portions. The plurality of spiral tube portions 74, 75, 76, and 77 may be arranged such that the central axis VX is vertically arranged. The plurality of spiral tube portions 74, 75, 76, and 77 may have a distance from the center axis VX to the other spiral tube portion. The plurality of spiral tube portions 74, 75, 76, and 77 may be spaced at equal intervals P. The plurality of spiral portions 74, 75, 76, and 77 may be spaced apart from each other in the radial direction of the case 21. The spiral tube portion 77 having the shortest distance from the center axis VX among the plurality of spiral tube portions 74, 75, 76 and 77 can be brought into contact with the first fluid discharge tube 40 and the plurality of spiral tube portions 74, 75, 76, 77 may be spaced apart from the inner wall of the shell 20 by a distance of a distance from the central axis VX.

The heat exchanger 4 can be connected in series with a pair of tubes having different distances from the central axis VX. The heat exchanger 4 may be connected to a pair of tubes having different distances from the central axis VX by connection tubes. The connecting tube may be formed in a U-shape. The pair of tubes and one connection tube can constitute one heat transfer path. The second fluid flows through the straight tube portion and the spiral tube portion of one of the pair of tubes in sequence and then flows to the connection tube. After passing through the other one of the pair of tubes and the straight tube portion sequentially, 20). The second fluid is heat-exchanged with the first fluid while passing through any one of the pair of tubes, and is then heat-exchanged with the first fluid while passing through the connection tube. Then, the second fluid is heat-exchanged with the first fluid while passing through the other one of the pair of tubes It is possible. The heat exchanger 4 can be provided with a plurality of pairs of tubes which are different in distance from the central axis VX and are connected in series.

For example, when four tubes 86, 87, 88 and 89 are provided, the first tube 86 may include a first spiral tube portion 74 and a first straight tube portion 81 And the second tube 87 may include a second spiral tube portion 75 and a second straight tube portion 82 and the third tube 88 may include a third spiral tube portion 76 and a third straight tube portion 76 83 and the fourth tube 89 may include a fourth helical tubular portion 77 and a fourth straight tubular portion 84. The first to fourth helical tube portions 74, 75, 76 and 77 may have the same central axis VX and may be spaced apart in a direction orthogonal to the central axis VX. The first spiral tube portion 74 and the fourth spiral tube portion 77 can be connected to the first connection tube 78 and the second spiral tube portion 75 and the third spiral tube portion 76 can be connected to the second connection tube 79 ). The second fluid passes through the first straight pipe portion 81 and the first helical pipe portion 74, the first connecting tube 78, the fourth helical pipe portion 77 and the fourth straight pipe portion 84, Fluid can be exchanged with the fluid. The second fluid can flow through the second straight pipe portion 82, the second spiral pipe portion 75, the second connection pipe 79, the third spiral pipe portion 76 and the third straight pipe portion 83 And can be heat-exchanged with the first fluid passing sequentially.

The heat exchanger 4 can affect the heat transfer efficiency by the flow path length of the plurality of spiral portions 74, 75, 76 and 77 and the flow rate of the first fluid passing through the heat exchanger 4, The spacing between the tube portions 74, 75, 76, 77 can affect the heat transfer efficiency.

The heat exchanger 4 has a length of a plurality of spiral portions 74, 75, 76, 77, which is a condition other than a space between the plurality of spiral tube portions 74, 75, 76, 77, 74, 75, 76, 77 is large, the flow of the first fluid flows through the plurality of spiral tube portions 74, and the flow of the first fluid through the spiral tube portions 74, The heat exchange capacity of the helical tube portion 74 closest to the shell 20 among the plurality of helical tube portions 74, 75, 76, and 77 that are concentrated among the plurality of helical tube portions 75, 76, If the distance between the helical tube portions 74, 75, 76 and 77 is small, the flow of the first fluid is the closest to the shell 20 among the plurality of helical tube portions 74, 75, 76, The heat exchanging ability of the burnishing tube portions 75, 76 and 77 may be lowered and the heat exchange capacity of the burnishing tube portions 75, 76 and 77 may be lowered due to the concentration of heat between the spiral tube portion 74 and the shell 20. [ The flow rate discharged to the first fluid discharge pipe 40 can be increased.

If the distance between the shell 20 and the spiral tube portion 74 closest to the shell 20 among the plurality of spiral tube portions 74, 75, 76 and 77 is too small, It may be difficult to attach and detach the case 21 easily and it is preferable that the case 21 can be easily attached and detached and have an interval capable of increasing the heat transfer amount of the plurality of helical tube portions 74, 75, 76,

8 is a graph showing a heat transfer amount according to a distance between a plurality of helical tube portions in an embodiment of the heat exchanger according to the present invention.

The heat exchanger 4 may use water capable of functioning as cooling water as an example of the first fluid, and one of various refrigerants such as a freon refrigerant or a carbon dioxide refrigerant, which is typically used in an air conditioner, . The heat exchanger 4 is arranged so that the interval between the plurality of spiral duct portions (the first fluid inlet pipe 30, the second fluid inlet pipe 30, and the third fluid inlet pipe 30) is 2.7 m / sec, 1.6 kg / sec, P) is changed. Heat transfer of water and refrigerant can be measured. In this case, when the interval P between the plurality of helical tube portions is twice the distance L between the helical tube portion 74 closest to the inner wall of the shell 20 and the inner wall of the shell 20, When the interval P between the plurality of helical tube portions is twice the interval L between the helical tube portion 74 closest to the inner wall of the shell 20 and the inner wall of the shell 20, (C = P / L) of the interval (P) between the plurality of helical tube portions and the distance L between the helical tube portion 74 closest to the inner wall of the shell 20 and the inner wall of the shell 20 If the heat transfer amount due to the heat transfer is made non-dimensional, it can be shown as in FIG.

 The spacing between the plurality of spiral tube portions 74, 75, 76, and 77 can be determined by Equation 1.

[Formula 1]

P = L x C

Where L is the distance between the spiral tube portion 74 closest to the inner wall of the shell 20 and the inner wall of the shell 20, and P is the distance between the plurality of spiral tube portions 74, 75, 76, And C is a value of one of 1.5 to 2.5.

The spacing P between the plurality of helical tube portions 74, 75, 76 and 77 can be high when the heat transfer amount is determined by Equation 1, and when C is a value between 1.8 and 2.2, .

  As shown in FIG. 8, when the value of C is one of 1.5 to 2.5, the heat exchanger 4 can obtain a heat transfer amount of about 70% or more of the maximum heat transfer amount, and C has a value of 1.5 to 2.5 . The region where C is 1.5 to 2.5 can be the application region (A) which can be applied in the heat exchanger (4).

When C is less than 1.5, the spacing P between the plurality of helical tube portions 74, 75, 76, 77 becomes relatively too small and the number of spiral tube portions 74, 75, 76, 77 The flow rate discharged to the first fluid discharge pipe 40 without heat exchange can be increased, and the amount of heat transfer can thereby be reduced.

If C is more than 2.5, the heat transfer amount of the helical tube portion 74 closest to the inner wall of the shell 20 is reduced, and the overall heat transfer amount can be reduced.

As shown in FIG. 8, when the value of C is one of 1.8 to 2.2, the heat exchanger 4 can obtain a heat transfer amount of about 92% or more of the maximum heat transfer amount, and C has a value of 1.8 to 2.2 . The region where C is 1.8 to 2.2 can be the optimum region B that can be applied in the heat exchanger 4. [

4: Heat exchanger 20: Shell
21: Case 22: Top cover
23: Lower cover 30: First fluid inlet pipe
40: first fluid discharge pipe 71, 72: turn
74, 75, 76, 77: spiral tube portion 78, 79:
81,82,83,84: straight pipe portion 86,87,88,89: tube
P: Spacing between multiple spiral ducts
L: space between the inner wall of the shell and the spiral tube part closest to the inner wall of the shell

Claims (11)

A shell having a space formed therein;
A first fluid inflow pipe having an outlet end through which the first fluid flows into the space;
A spiral tube portion having a plurality of spirals continuously passing through a plurality of turns through which a second fluid to be heat-exchanged with the first fluid passes and a distance from the central axis is the same;
And a first fluid discharge pipe in which an inlet end through which the first fluid flowing out of the space flows is formed,
Wherein a plurality of the helical tube portions are arranged outside the first fluid discharge tube so as to be spaced apart from each other in a direction orthogonal to the central axis,
Wherein the outlet end is located at an inner lower portion of the shell, the inlet end is located at an inner upper portion of the shell,
Wherein the plurality of spiral tube portions are spaced apart from each other by a distance from the center axis and are equidistantly spaced apart from each other and a spiral tube portion that is the farthest from the center axis among the plurality of spiral tube portions is spaced from the inner wall of the shell,
Wherein the spacing between the plurality of helical tubular portions is determined by Equation (1).
[Formula 1]
P = L x C
Here, P is an interval between the plurality of helical tube portions,
L is an interval between a spiral tube portion closest to an inner wall of the shell and an inner wall of the shell,
And C is a value of one of 1.6 to 2.4. The method according to claim 1,
Wherein the plurality of spiral tube portions are arranged such that the central axes thereof are vertically arranged. delete delete The method according to claim 1,
And a spiral tube portion of the plurality of spiral tube portions that is the farthest from the central axis is spaced apart from the inner wall of the shell. 6. The method of claim 5,
Wherein the first fluid inlet tube has an outlet end through which the first fluid exits and faces at least one of the plurality of spiral tube sections. The method according to claim 1,
Wherein the plurality of spiral duct portions are connected to one spiral tube portion by two spiral duct portions. 8. The method of claim 7,
Wherein the straight pipe portion is extended to the helical pipe portion, and the straight pipe portion is fixed to the shell. The method according to claim 1,
The shell
A long case extending in a vertical direction;
A top cover coupled to an upper portion of the case;
And a lower cover coupled with a lower portion of the case. 10. The method of claim 9,
Wherein the plurality of helical tube portions are radially spaced apart from the case. The method according to claim 1,
Wherein C in the first equation is one of a value between 1.8 and 2.2.

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