KR100442806B1 - Heat exchanger - Google Patents

Abstract

The present invention is to reduce the air permeation resistance and prevent the growth of the boundary layer while reducing the dead space of the heat pipe back to increase the heat transfer performance of the heat inlet and the wind outflow side of the heat pipe based on the center line of the heat pipe 3 by 3 rows each Arrange the cutting projections, the inner cutting projections of the inlet side and the outflow side is composed of a single body, the outer cutting projections are divided into two divided each, in the case of the intermediate cutting projections disposed between the inner cutting projections and the outer cutting projections, The side is divided into two, the outflow side relates to a heat exchanger consisting of a single unit, in the case of this heat exchanger, the outer cutting protrusion (111, 111 ') and the intermediate cutting protrusion 112, 112 'is formed of two divided bodies, and the inner cutting protrusion 113 is formed of a single body, and the first granular portion 111a of the double outer cutting protrusions 111 and 111' and the intermediate cutting protrusions 112 and 112 '. , 111 a '; 112a and 112a' are parallel to the air flow direction l and the second granular portions 111b and 111b '; 112b and 112b' are parallel to the tangential direction of the heat pipe 102; Outer cutting protrusions 116 and 116 'of the cutting protrusion group on the airflow outlet side are divided into two parts while being symmetrical with the outer cutting protrusions 111 and 111' on the airflow inlet side with respect to the center line CC of the heat transfer pipe 102. The first granular portions 116a and 116a 'are parallel to the air flow direction l, and the second granular portions 116b and 116b' are parallel to the tangential direction of the heat transfer pipe 102, and the intermediate cutting protrusion 115 ) And the inner cutting protrusion 114 are each formed in a single body, and both of the granular portions 115a and 115b of the intermediate cutting protrusion 115 are second granular portions 116b and 116b of the outer cutting protrusions 116 and 116 '. Similar to '), parallel to the tangential direction of the heat transfer pipe 102, and the raised portions 114a and 114b of the inner cutting protrusion 114 is configured to be parallel to the air flow direction (l).

Description

Heat exchanger {HEAT EXCHANGER}

The present invention relates to a heat exchanger, and more specifically, to the evaporation performance while reducing the pressure drop to improve the evaporation performance by configuring the cutting projection structure of the inflow side and the outflow side of the wind blown relative to the center line of the heat transfer tube. A heat exchanger that can be.

In general, since the interior space of a building is contaminated by internal factors such as occupants' breath, it is necessary to periodically supply fresh air from the outside.

In addition, in hot summer or cold winter, the room should be cooled and heated to an appropriate temperature, and the proper humidity is maintained to be suitable for people's activities.

To this end, most buildings are equipped with air conditioners.

A typical air conditioner is an air conditioner that cools a room by using a phenomenon of absorbing heat when surrounding liquid evaporates.

The air conditioner consists of a compressor for compressing the refrigerant into a gas of high temperature / high pressure, a condenser for liquefying the compressed high temperature / high pressure refrigerant, and a heat exchanger for evaporating the refrigerant expanded by the expansion valve. The cooled air is forcedly blown into the room where cooling is required by the blowing fan in the blower assembly.

This type of heat exchanger is composed of heat transfer tubes such as copper and fins connected to each other by U bends, and the air flowing between the fluid and the fins passing through the heat transfer tubes is cooled by heat exchange with the refrigerant. Have

In heat exchangers, miniaturization and high performance have recently been required, but problems of deterioration of heat transfer performance and generation of noise are accompanied.

Accordingly, there have been attempts to improve heat transfer performance and reduce noise while achieving miniaturization and high performance of heat exchangers.

Korean Patent No. 1991-3071, filed on October 28, 1988 and registered on May 17, 1991, discloses a heat exchanger to improve heat transfer performance while simultaneously reducing noise.

The fin shape of the heat exchanger disclosed in this patent has a structure as shown in FIG.

That is, the heat transfer pipe 2 is inserted into the pin collar 12, which is burried at a predetermined interval on the plate-shaped pin 1, and the wind flows in the direction of the arrow (A).

The fin 1 has three rows on the inflow side of the wind flow A between two heat transfer tubes 2 adjacent in the short direction, three rows on the outflow side where the wind blows, and a total of six rows. It has a cutting protrusion group which consists of cutting protrusion pieces.

Among the six rows of cutting projection pieces, the cutting projection pieces in the most upstream and downstream streams of the air stream are each composed of two cutting projection pieces 14 and 24 separated by the central divided flat portion 3a, and the cutting projections in different rows. Each piece consists of one cutting protrusion piece 4, respectively. The openings 8, 18, and 28 of the six rows of cutting projection pieces are perpendicular to the air flow direction l.

In addition, the granular portions 5, 6, 15, and 25 on the heat transfer pipe 2 side of each of the cutting projection pieces 4, 14, and 24 are tangent to the heat transfer pipe 2 (m). The inclination angle is set in a direction substantially along a line extending in parallel with the cross-section), and the granular portions 16 and 26 on the central portion of the two cutting protrusion pieces 14 and 24 respectively at the upstream end or the downstream end of the air stream are formed into the granular part ( Parallel to 15 and 25, respectively, the cutting projection pieces 14 and 24 are formed in parallel quadrilateral shapes.

The six rows of cutting projection pieces are alternately formed with the cutting projections on the surface side and the rear surface side of the pin 1 with the intermediate flat portion 3b interposed therebetween.

According to the above configuration, the effect of improving the heat transfer rate between the air and the fin surface can be expected to increase the heat exchange efficiency, but noise is still generated and there is a limit to the improvement of the evaporation performance.

The present invention for solving the above problems is configured heat exchanger to improve the evaporation performance while reducing the pressure drop by configuring the cutting protrusion structure of the inflow side and the blowing side of the wind blowing on the basis of the center line of the heat transfer pipe The purpose is to provide a flag.

1 is a plan view showing the fin shape of a conventional heat exchanger,

Figure 2 is a perspective view showing the fin shape of the heat exchanger according to the present invention,

3 is a plan view showing the fin shape of the heat exchanger according to the present invention;

4 is a cross-sectional view taken along the line IV-IV in FIG.

FIG. 5 is a cross-sectional view taken along the line VV of FIG. 3. FIG.

♣ Explanation of symbols for main part of drawing ♣

100: fin 102: heat transfer pipe

111, 111 ', 116, 116': Outer cutting protrusion 112, 115: Middle cutting protrusion

113, 114: inner cutting protrusion 100a: split flat part

100b: Middle flat part 118: Opening

The heat exchanger of the present invention for achieving the above object is arranged in parallel at a predetermined interval, a plurality of flat fins through which air flows therebetween, and a heat transfer tube inserted at right angles to each of the flat fins and passing the fluid therein A plurality of airflow inlet side cutting protrusion groups and airflow outflow side cutting protrusion groups are disposed between the two heat transfer tubes with respect to the center line of the heat of the heat transfer tube, between the two heat transfer tubes. A central flat portion located on the center line of the heat transfer tube is formed therebetween, and each cutting protrusion composed of a granular portion protruding from the fin surface at both ends and a cross-linking portion between the two granular portions has a front side and a rear surface side with respect to the fin surface. Alternately protruding from each other, an intermediate flat portion is formed between the cutting protrusions, and each of the cutting protrusions uses the intermediate flat portion. In the heat exchanger disposed in parallel adjacent to each other, the outer cutting projection and the intermediate cutting projection of the cutting projection group on the inlet side of the air flow is formed of two divided bodies, the inner cutting projection is formed of a single body, the double outer cutting projection and the intermediate The first granular portion of the cutting projection is parallel to the airflow direction and the second granular portion is parallel to the tangent of the heat transfer pipe; The outer cutting protrusion of the cutting protrusion group on the outflow side of the air flow is formed into two divisions symmetrically with the outer cutting protrusion on the inflow side of the heat transfer tube with respect to the center line of the heat transfer pipe, and the first granular portion is parallel to the airflow direction and the second granular portion is Parallel to the tangential direction of the heat transfer pipe, the intermediate cutting protrusion and the inner cutting protrusion are each formed in a single body, wherein both of the granular portions of the intermediate cutting protrusion are parallel to the tangential direction of the heat transfer pipe and are cut inside the same as the second granular portion of the outer cutting protrusion. Both granular portions of the projections are characterized by being parallel to the airflow direction.

Hereinafter, a heat exchanger according to a preferred embodiment of the present invention will be described in detail with reference to FIGS. 2 to 5.

2 is a perspective view showing the fin shape of the heat exchanger according to the present invention, Figure 3 is a plan view showing the fin shape of the heat exchanger according to the present invention, Figure 4 is a cross-sectional view taken along the line IV-IV in Figure 3 and Figure 5 3 is a cross-sectional view taken along the line VV.

The fin shape of the heat exchanger according to the present invention has a structure as shown in FIG.

That is, the heat transfer tube 102 is inserted into the flat plate-shaped pin 100 at a predetermined interval, and the wind flows in the direction of the arrow A to exchange heat with the refrigerant.

That is, the plurality of flat fins 100 are arranged in parallel at regular intervals, and the plurality of heat transfer tubes 102 through which fluid flows are inserted at right angles to the flat fins 100.

In the flat fin 100 of the present invention, between the two heat pipes 102, a total of six rows of cutting protrusions are formed on each of the inflow side of the air flow A and the outflow side of the wind. .

Here, the inflow side refers to the side (bottom in Figs. 2 and 3) in which the air flow (A) is blown, based on the center line (CC) of the heat pipe 102 row, the outlet side is the center line (CC) of the heat pipe 102 row. On the basis of the reference point, the air flow A is blown out (upper in Figs. 2 and 3).

Center located on the center line of the heat exchanger tube 102 between the airflow inlet side cutting protrusion group 111, 111 '; 112, 112'; 113 and the airflow outlet side cutting protrusion group 114; 115; 116, 116 '. The flat part 100a is formed.

Each cutting protrusion (for example, 113; 114 in the center) is a bridge between the granular portions 113a, 113b; 114a, 114b, which protrude from the fin surface at both ends, and the two granular portions 113a, 113b; 114a, 114b. It is composed.

Further, each of the cutting protrusions is formed by alternately protruding the surface side and the rear side with respect to the pin surface or by protruding both in the surface side and the rear side.

That is, as shown in detail in Figs. 2 and 5, the first side cutting projections (111, 111 '), the third row cutting projections 113, the fifth row cutting projections in order from the bottom to the surface side of the pin surface 115 is formed, and the fourth row cutting projections 114 and the sixth row cutting projections 116 and 116 'are formed on the rear surface thereof, including the second row cutting projections 112 and 112'.

Intermediate flat portions 100b are formed between the cutting projections, and the six rows of cutting projections are arranged adjacently in parallel with the intermediate flat portions 100b interposed therebetween.

Looking in more detail the configuration of the air flow inlet side cutting protrusion group (111, 111 '; 112, 112'; 113), the inner cutting protrusion 113 is located close to the center line (CC) of the heat transfer pipe 102, the most forward It consists of the outer cutting protrusions 111 and 111 'located in the airflow inflow side, and the intermediate cutting protrusions 112 and 112' located between the inner cutting protrusion 113 and the outer cutting protrusions 111 and 111 '. .

Among them, the outer cutting protrusions 111 and 111 'and the intermediate cutting protrusions 112 and 112' are formed of two divided bodies, the inner cutting protrusion 113 is formed of a single body, and the double outer cutting protrusions 111 and 111 '. ') And the first granular portions 111a, 111a'; 112a, 112a 'of the intermediate cutting protrusions 112, 112' are parallel to the airflow direction l and the second granular portions 111b, 111b '; 112b, 112b. ') Is formed parallel to the tangential direction of the heat transfer pipe (102).

In addition, the configuration of the outflow side cutting protrusion group 114; 115; 116, 116 'shows that the inner side cutting protrusion 114 located close to the center line CC of the heat transfer pipe 102 and the rearmost airflow outlet side. The outer cutting protrusions 116 and 116 'are positioned, and the intermediate cutting protrusion 115 is positioned between the inner cutting protrusion 114 and the outer cutting protrusions 116 and 116'.

Among them, the outer cutting protrusions 116 and 116 'are formed in two segments while being symmetrical with the outer cutting protrusions 111 and 111' of the air flow inlet side with respect to the center line CC of the heat transfer pipe 102. The first granular portions 116a and 116a 'are formed parallel to the air flow direction l and the second granular portions 116b and 116b' are formed parallel to the tangential direction of the heat transfer pipe 102.

In addition, the intermediate cutting protrusion 115 and the inner cutting protrusion 114 are each formed in a single body, and both the granular portions 115a and 115b of the intermediate cutting protrusion 115 are formed of the outer cutting protrusions 116 and 116 '. Similar to the two riser portions 116b and 116b ', both of the riser portions 114a and 114b of the inner cutting protrusion 114 are formed parallel to the tangential direction of the heat transfer pipe 102 and parallel to the airflow direction l.

The present invention configured as described above, the air flowing into the first row and the second row (111, 111 '; 112, 112') from the air inlet side flows uniformly to the base surface of the heat transfer pipe 102 and the fin 100 To improve heat transfer and to reduce heat transfer due to the continuous growth of the flow boundary layer on the base surface located between the divided protrusions which are formed in the case of a divided protrusion by forming the cutting protrusion 115 on the outflow side in a single body. Stop it.

In addition, if the surface state of the part connected to the granular part of the protrusion is enlarged from the base surface, the surface roughness that resists the air flow is relatively higher as more granular parts are removed from the base surface and raised to the granular part of the protrusion. The pin face of the granular part is also in a bent shape, which does not coincide with the streamline, thereby increasing the ventilation resistance.

Therefore, in order to reduce the ventilation resistance, the outflow side intermediate cutting protrusion 115 was formed as a single body so that the number of granular parts was formed to be two, and another effect of the outflow side intermediate cutting protrusion 115 as a single body was condensed water. The smooth discharge of condensate prevents air flow and condensate from scattering.

That is, in the wet coil state in which the condensate is formed, as the protrusion is divided, the condensate is trapped in the vent of the protrusion due to the surface tension of the protrusion, which makes it difficult to discharge the condensate. It is greatly dropped, the present invention is to ensure that the condensed water is smoothly discharged by using the outgoing intermediate cutting protrusion 115 as a single body.

In addition, since the dead space generated on the heat transfer pipe of the outlet causes flow pressure loss and heat transfer loss, the dead space must be minimized to reduce the airflow resistance and the heat transfer efficiency deterioration, and the present invention is located after the outlet intermediate cutting protrusion 115. The second granular portions 116b and 116b 'were brought close to the heat transfer tubes in order to configure the outer cutting protrusions 116 and 116' to reduce the dead space of the heat pipe downstream.

In this case, the monolithic body is weak in rigidity due to the increase in the length of the crosslinked portion, causing the crosslinked portion to bend or tremble in the flow air, that is, abnormal noise is generated. ) Is used to maintain the rigidity of the crosslinked portion by using two split bodies.

In the embodiment of the present invention, the heat pipe is shown an example consisting of one row in parallel with the air flow direction, the present invention is not limited to this, even when the heat pipe is composed of multiple rows in parallel with the air flow direction cutting projection shape according to the present invention is each Naturally, it can be formed in multiple rows symmetrically with respect to the center line dividing the heat pipes.

According to the present invention described above, three rows of cutting protrusions are arranged on the inflow side and the outflow side of the wind from the air inlet side, respectively, based on the center line of the heat pipes of the first and second rows. The inner cutting protrusion on the outflow side is composed of a single body, and the outer cutting protrusion is divided into two, and in the case of the intermediate cutting protrusion disposed between the inner cutting protrusion and the outer cutting protrusion, the inflow side is divided into two, and the outflow side is By forming a single body, it is possible to reduce the pressure drop to increase the amount of air, there is an advantage to improve the evaporation performance by increasing the heat transfer rate between the air and the fin surface.

Claims (5)

A plurality of flat fins arranged in parallel at regular intervals and in which air flows therebetween, and a plurality of heat transfer tubes inserted at right angles to each of the flat fins and passing fluid therein are provided at right angles to the passage direction of the airflow. Between the two heat pipes, the airflow inlet side cutting protrusion group and the airflow outlet side cutting protrusion group are disposed with respect to the centerline of the heat of the heat transfer tube, and between these two cutting protrusion groups, the central flat located on the centerline of the heat transfer tube. An additional portion is formed, and each cutting protrusion composed of a granular portion protruding from the fin surface at both ends and a cross-linking portion between the two granular portions is formed by alternately protruding the surface side and the rear surface side with respect to the pin surface, and between the cutting protrusions. An intermediate flat portion is formed, and each of the cutting protrusions is disposed in a heat exchanger disposed adjacently in parallel with the intermediate flat portion therebetween. hurry, The outer cutting protrusions 111 and 111 'and the middle cutting protrusions 112 and 112' of the cutting protrusion group on the inflow side of the air flow are formed of two divided bodies, and the inner cutting protrusion 113 is formed of a single body, and the double outer side thereof. The first and second granular portions 111a and 111a 'and 112a and 112a' of the cutting protrusions 111 and 111 'and the intermediate cutting protrusions 112 and 112' are parallel to the airflow direction l and the second granular portions 111b and 111b '; 112b and 112b' are parallel to the tangential direction of the heat pipe 102; The outer cutting protrusions 116 and 116 ′ of the cutting protrusion group on the airflow outlet side are symmetrical with the outer cutting protrusions 111 and 111 ′ on the airflow inlet side with respect to the center line CC of the heat transfer pipe 102. The first granular portions 116a and 116a 'are parallel to the air flow direction l and the second granular portions 116b and 116b' are parallel to the tangential direction of the heat transfer pipe 102, and the intermediate cutting protrusions 115 and the inner cutting protrusion 114 are each formed in a single body, and both of the granular portions 115a and 115b of the intermediate cutting protrusion 115 are formed of the second granular portion of the outer cutting protrusions 116 and 116 '. Like 116b, 116b '), the heat exchanger is parallel to the tangential direction of the heat pipe 102, and both of the risers 114a and 114b of the inner cutting protrusion 114 are parallel to the air flow direction l. The method of claim 1, The interval between the first granular portions 111a and 111a 'of the both outer cutting projections 111 and 111' on the inflow side of the airflow is the first granular portions 112a and 112a of the intermediate cutting projections 112 and 112 '. By forming a larger than the interval between '), the second granular portion (111b, 111b'; 112b, 112b ') of the both outer cutting projections (111, 111') and the intermediate cutting projections (112, 112 ') is transferred to the heat pipe (102). Heat exchanger, characterized in that disposed close to at approximately the same distance as). The method of claim 1, The second granular portions 112b and 112b 'of the intermediate cutting protrusions 112 and 112' on the airflow inlet side and the both granular portions 115a and 115b of the intermediate cutting protrusions 115 and 115 'on the airflow outlet side are respectively. Heat exchanger, characterized in that arranged in close proximity at approximately the same distance as the heat pipe (102). The method of claim 1, Each of the cutting protrusions is formed by alternately protruding from the surface side and the back side with respect to the fin surface, or all of the cutting protrusions protrude in the same direction of either the surface side or the back side. The method of claim 1, When the heat exchanger tube 102 is a heat exchanger composed of two rows in parallel with the air flow direction, each cutting protrusion shape is formed symmetrically with respect to the center line between the first and second rows of heat transfer tubes.