KR20150098141A - Heat exchanger and air conditional having the same - Google Patents

Abstract

The present invention relates to a heat exchanger and an air conditioner having the same, wherein a refrigerant is dispersed in the heat exchanger to be heat-exchanged. The heat exchanger comprises: a plurality of refrigerant tubes; a header joined to both ends of the refrigerant tubes; a plurality of inlet tubes installed in one side of the header to allow a refrigerant to dispersedly be flowed in; and a plurality of outlet tubes corresponding to the inlet tubes to allow the refrigerant flowing in through the inlet tubes to be discharged through the refrigerant tubes in different dispersion groups. As such, the refrigerant can be dispersed at a predetermined flow rate to flow into the heat exchanger, and to effectively be heat-exchanged.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a heat exchanger,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger and an air conditioner having the heat exchanger, and more particularly, to a heat exchanger in which refrigerant is divided and heat-exchanged, and an air conditioner having the same.

Generally, the air conditioner uses a refrigeration cycle to control the temperature, humidity, airflow, distribution, etc. suitable for human activity and to remove dust and the like in the air. Compressors, condensers, evaporators, expansion valves, ventilation fans, etc., are the main components of the refrigeration cycle.

The air conditioner may be divided into a separate type air conditioner in which an indoor unit and an outdoor unit are separately installed, and an integrated type air conditioner in which an indoor unit and an outdoor unit are installed together in a single cabinet. The indoor unit of the separate type air conditioner includes a heat exchanger for exchanging heat with the air sucked into the panel, and a blowing fan for sucking indoor air into the panel and blowing the sucked air back into the room.

The heat exchanger constitutes an air conditioner and can serve as a condenser or an evaporator. The heat exchanger is provided with a refrigerant tube for guiding the refrigerant, and the refrigerant tube can be combined with a plurality of heat exchange fins to increase heat exchange efficiency.

A heat exchanger having a microchannel refrigerant tube is known to be superior in heat transfer characteristics to other types of heat exchangers and is used as a heat exchanger of an air conditioner. However, there is a problem that the refrigerant is not uniformly distributed to the refrigerant tube due to the phase change of refrigerant flowing through the microchannel refrigerant tube. Particularly, as the dryness of the coolant increases, the refrigerant distribution from the header to the microchannel tube becomes disadvantageous.

The refrigerant distribution characteristics from these headers to the microchannel tubes are influenced by the refrigerant mass flow rate and the effective cross-sectional area of the header. Therefore, there is a problem that specifications of various headers are required to cope with various capacity products.

According to an aspect of the present invention, there is provided a heat exchanger for providing a refrigerant so that a plurality of refrigerant tubes can efficiently exchange heat, and an air conditioner having the same.

The present invention also provides a heat exchanger capable of distributing the flow rate of the refrigerant as needed using a distributor, and an air conditioner having the heat exchanger.

The heat exchanger according to the present invention includes a plurality of refrigerant tubes, a header coupled to both ends of the plurality of refrigerant tubes, a plurality of inflow tubes installed at one side of the header, And a plurality of outflow pipes installed in correspondence with the plurality of inflow pipes so that the refrigerant introduced through the pipes are respectively discharged through the refrigerant tubes of the different distribution groups.

And at least one distribution baffle installed in the header to divide the plurality of refrigerant tubes into a plurality of distribution groups each including one inlet pipe and one outlet pipe.

The plurality of refrigerant tubes belonging to the same dispensing group may include at least one flow baffle installed in the header such that the refrigerant flows in the same direction and divides the refrigerant tubes into a plurality of adjacent flow groups.

The flow baffle is configured such that one distribution group is divided into a first flow group, a second flow group, a third flow group, and a fourth flow group, A second flow baffle, a second flow baffle positioned between the second flow group and the third flow group, and a third flow baffle positioned between the third flow group and the fourth flow group.

A plurality of refrigerant tubes belonging to one distribution group are supplied to the first flow group at 11% or more, 16% or less, 17% or more and 22% or less in the second flow group, 26% 29% or less, and 34% or more and 46% or less in the fourth flow group.

And at least one flow velocity baffle located between the refrigerant tubes belonging to the same flow group to reduce the effective cross-sectional area of the header to increase the flow rate of the refrigerant.

To prevent heat transfer between different dispensing groups, the plurality of refrigerant tubes may include a lease refrigerant tube located between dispensing groups.

And a distributor connected to the plurality of inlet pipes and distributing the refrigerant at a predetermined refrigerant flow rate.

The plurality of inflow pipes connecting the distributor and the heat exchanger may be provided with different lengths.

An air conditioner according to an embodiment of the present invention includes a compressor for compressing a refrigerant gas and an expansion valve for expanding the refrigerant liquid. The air conditioner includes a plurality of refrigerant tubes, a pair of refrigerant tubes And a distributor disposed between the expansion valve and the heat exchanger and distributing the refrigerant to the heat exchanger.

And a plurality of inlet pipes connecting the distributor and the heat exchanger such that the refrigerant distributed through the distributor flows into the heat exchanger, respectively.

The heat exchanger may include at least one distribution baffle installed in the header to divide the plurality of refrigerant tubes into a plurality of distribution groups each having an inlet tube and an outlet tube.

The at least one distribution baffle may be installed in each of the pair of headers so that the refrigerant flows through a refrigerant tube belonging to a different dispensing group.

The heat exchanger may include at least one flow baffle installed in the header to divide the plurality of refrigerant tubes belonging to the same dispensing group into a plurality of flow groups adjacent to each other and flowing in the same direction as the refrigerant flows.

The at least one flow baffle may be installed in at least one of the pair of headers such that refrigerant circulates through the pair of headers.

It is possible to distribute the refrigerant at a predetermined flow rate and to flow the refrigerant into the heat exchanger, thereby effectively performing heat exchange.

In addition, it is possible to have optimal distribution characteristics for products of various capacities with a minimum number of header specifications.

1 is a view illustrating a refrigerant cycle of an air conditioner according to an embodiment of the present invention.
FIG. 2 is a view showing a flow of a refrigerant when a heat exchanger according to an embodiment of the present invention is used as a condenser.
FIG. 3 is a view illustrating a flow of a refrigerant when a heat exchanger according to an embodiment of the present invention is used as an evaporator.
4 is a view illustrating a heat exchanger according to an embodiment of the present invention.
5 is a view illustrating a distributor of a heat exchanger according to an embodiment of the present invention.
FIG. 6 is a view illustrating a distribution baffle, a flow baffle, and a flow rate baffle of a heat exchanger according to an embodiment of the present invention.
FIG. 7 illustrates various embodiments of a flow rate baffle of a heat exchanger in accordance with an embodiment of the present invention.

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

1 is a view showing a refrigerant cycle of the air conditioner 1 according to an embodiment of the present invention.

The refrigerant cycle constituting the air conditioner 1 is composed of a compressor 7, a condenser, an expansion valve 3, and an evaporator. The air conditioner 1 can heat the refrigerant circulating in a series of processes consisting of compression-condensation-expansion-evaporation and air to supply conditioned air to the indoor space.

The compressor (7) compresses and discharges the refrigerant gas in a state of high temperature and high pressure, and the discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, releases heat to the surroundings through the condensation process, and achieves a heating effect.

The expansion valve (3) expands the liquid refrigerant in the high temperature and high pressure state condensed in the condenser to the liquid refrigerant in the low pressure state. The evaporator evaporates the refrigerant expanded in the expansion valve (3) and returns the low-temperature low-pressure refrigerant gas to the compressor (7). The evaporator can achieve the freezing effect by heat exchange with the object to be cooled by using the latent heat of evaporation of the refrigerant. Through the refrigerant cycle, the air conditioner 1 can adjust the air temperature of the indoor space.

The outdoor unit 200a of the air conditioner 1 refers to the portion including the compressor 7 and the outdoor heat exchanger 10a during the refrigeration cycle. The expansion valve 3 may be located in either the indoor unit 200b or the outdoor unit 200a and the indoor heat exchanger 10b may be provided in the indoor unit 200b of the air conditioner 1. [

The indoor heat exchanger 10b and the outdoor heat exchanger 10a may be provided with the same type of heat exchanger 10 (Fig. 2). When the heat exchanger 10 is used as a condenser, gaseous refrigerant is introduced and discharged in a liquid state, and when used as an evaporator, refrigerant in a liquid state can be discharged in a gaseous state.

The outdoor heat exchanger 10a and the indoor heat exchanger 10b may be used either as a condenser or an evaporator. The indoor heat exchanger 10b serves as an evaporator when the outdoor heat exchanger 10a serves as a condenser and the indoor heat exchanger 10b serves as a condenser when the outdoor heat exchanger 10a serves as an evaporator.

The refrigerant cycle shown by a solid line in FIG. 1 represents a cooling cycle for cooling an indoor space. The outdoor heat exchanger 10a serves as a condenser and the indoor heat exchanger 10b serves as an evaporator. The high-temperature and high-pressure refrigerant gas compressed by the compressor 7 flows into the outdoor heat exchanger 10a, and the outdoor heat exchanger 10a condenses the refrigerant gas into the refrigerant liquid to discharge the heat to the outdoor air. The refrigerant liquid exiting the outdoor heat exchanger (10a) is expanded in the expansion valve (3) and flows into the indoor heat exchanger (10b). The indoor heat exchanger (10b) evaporates the refrigerant liquid into the refrigerant gas and can take the heat of the room air to cool the indoor space.

The refrigerant cycle shown by a dotted line in FIG. 1 represents a heating cycle for heating the indoor space. The outdoor heat exchanger 10a serves as an evaporator and the indoor heat exchanger 10b serves as a condenser. The refrigerant moves in a direction opposite to the cooling cycle indicated by the solid line described above. The refrigerant gas from the compressor 7 flows into the indoor heat exchanger 10b and the indoor heat exchanger 10b releases the heat to the room air to heat the room. The indoor heat exchanger 10b condenses the refrigerant gas into a refrigerant liquid and sends it to the expansion valve 3. The refrigerant that has passed through the expansion valve 3 is phase-changed from the outdoor heat exchanger 10b to the refrigerant gas.

The refrigerant conversion device 60 can change the direction of the refrigerant so that the refrigerant cycle can be used as a heating cycle and a cooling cycle. The refrigerant can flow clockwise or counterclockwise due to the refrigerant conversion device 60 and the air conditioner 1 can be used as a cooling and heating air conditioner 1 capable of cooling or heating indoor air.

The refrigerant conversion device (60) may be located between the compressor (7) and the outdoor heat exchanger (10a). The refrigerant conversion device 60 is installed adjacent to the compressor 7 having the greatest influence among the refrigerant cycles constituting the air conditioner 1, so that the direction of the refrigerant can be more easily changed.

In the present invention, the heat exchanger 10 can be used as a condenser or an evaporator, and can be used as an indoor heat exchanger 10b or an outdoor heat exchanger 10a.

FIG. 2 is a view showing a flow of a refrigerant when a heat exchanger 10 according to an embodiment of the present invention is used as a condenser, and FIG. 3 is a cross-sectional view of a heat exchanger 10 according to an embodiment of the present invention, If used, the flow of the refrigerant.

The heat exchanger 10 includes a plurality of refrigerant tubes 20 and a pair of headers 41 and 42 coupled to both ends of the plurality of refrigerant tubes 20. The refrigerant pipes 43, 44, 45, 46, 47 and 48, which are connected to the compressors 7 and the expansion valve 3 and connected to the refrigerant pipes, can be connected to one side of the headers 41 and 42 .

The headers 41 and 42 may include a first header 41 and a second header 42 that are coupled to both ends of the plurality of refrigerant tubes 20, respectively. The refrigerant can flow through the plurality of refrigerant tubes 20 through the first header 41 and the second header 42. 2 and 3, the header provided with the refrigerant tubes 43, 44, 45, 46, 47 and 48 is referred to as a first header 41 and the remainder is referred to as a second header 42. [

A plurality of refrigerant tubes (20) are provided extending in the longitudinal direction and are spaced apart from each other at predetermined intervals. The refrigerant tube 20 may be formed by hollowing the inside of the refrigerant tube 20 so that the refrigerant can flow. The refrigerant tube 20 may be a microchannel refrigerant tube, usually a tube with a hydraulic diameter of 3 mm or less. The hydraulic diameter can be obtained by dividing the cross-sectional area of the tube by the circumference of the tube.

The refrigerant pipes 43, 44, 45, 46, 47 and 48 are connected to the refrigerant pipes 43 and 45 connected to the compressor 7 and the liquid refrigerant pipes 44 and 46 connected to the expansion valve 3, , 48). 2, when the refrigerant enters through the gas refrigerant pipes 43, 45 and 47 and the refrigerant exits through the liquid refrigerant pipes 44, 46 and 48, the heat exchanger 10 functions as a condenser .

Conversely, when the refrigerant enters through the liquid refrigerant pipes 44, 46 and 48 and the refrigerant exits through the gas refrigerant pipes 43, 45 and 47, the heat exchanger 10 can function as an evaporator. 3 shows a heat exchanger 10 used as an evaporator in which refrigerant enters the liquid refrigerant tubes 44, 46 and 48 to heat-exchange and escape to the gas refrigerant tubes 43, 45 and 47.

At this time, a plurality of liquid refrigerant pipes (44, 46, 48) and gas refrigerant pipes (43, 45, 47) may be provided correspondingly. 2 and 3 show three liquid refrigerant pipes 44, 46 and 48 and three gas refrigerant pipes 43 and 45 and 47. The liquid refrigerant pipes 44, 46 and 48, A case where three refrigerant pipes 43, 45, 47 are provided will be described. The first gas refrigerant pipe 43, the first liquid refrigerant pipe 44, the second gas refrigerant pipe 45, the second liquid refrigerant pipe 46, the third gas refrigerant pipe 47, Liquid refrigerant tube 48. [

In FIG. 2, the refrigerant is distributed through the first gas refrigerant pipe 43, the second gas refrigerant pipe 45, and the third gas refrigerant pipe 47, and flows into the heat exchanger 10. The divided refrigerant flows through the different refrigerant tubes 20 and flows through the first liquid refrigerant pipe 44, the second liquid refrigerant pipe 46 and the third liquid refrigerant pipe 48 through the heat exchanger 10, ≪ / RTI >

That is, when the heat exchanger 10 is used as a condenser, each of the gas refrigerant tubes 43, 45, 47 becomes an inlet tube, and each of the liquid refrigerant tubes 44, 46, 48 becomes an outlet tube. When the heat exchanger 10 shown in FIG. 3 is used as an evaporator, the respective liquid refrigerant pipes 44, 46 and 48 become inflow pipes, and the respective gas refrigerant pipes 43, 45, .

Accordingly, the heat exchanger 10 may include a plurality of inlet pipes and outlet pipes. The refrigerant, which has been distributed through the plurality of inlet pipes, may be discharged through the plurality of outlet pipes through the refrigerant tubes 20 of the different distribution groups A, B, and C, respectively.

One inlet pipe and one outlet pipe may be provided in each of the plurality of distribution groups (A, B, C). 2, the refrigerant that enters through the first gas refrigerant pipe 43 and exits through the first liquid refrigerant pipe 44 passes through the refrigerant tube 20 belonging to the first distribution group A, can do. As described above, the plurality of refrigerant tubes 20 can be divided into a first distribution group A, a second distribution group B, and a third distribution group C.

In order to divide the plurality of refrigerant tubes 20 into a plurality of distribution groups A, B and C, the heat exchanger 10 has at least one distribution baffle 51, 52, 53 , 54). The distribution baffles 51, 52, 53, 54 may be installed to block longitudinal flow of refrigerant flowing through the header 41, 42.

The distribution baffles 51, 52, 53 and 54 may be installed in the first header 41 and the second header 42, respectively, so that the refrigerant introduced into the different inlet pipes does not meet inside the heat exchanger 10 . The distribution baffles 51, 52, 53 and 54 comprise upper distribution baffles 51 and 52 for separating the first distribution group A and the second distribution group B and the upper distribution baffles 51 and 52 for separating the second distribution group B and the third distribution group B, And a lower distribution baffle 53, 54 that divides the dispensing group C. The upper distribution baffles 51 and 52 and the lower distribution baffles 53 and 54 include at least one first upper distribution baffle 51 installed in the first header 41 and the second header 42, 2 upper distribution baffle 52, a first lower distribution baffle 53, and a second lower distribution baffle 54. [

To prevent heat transfer between different dispensing groups A, B, C, the plurality of refrigerant tubes 20 may include lease refrigerant tubes 56, 57 located between dispensing groups. The refrigerant for heat exchange does not flow into the lease refrigerant tubes (56, 57). The lease refrigerant tubes 56 and 57 have an upper lease tube 56 positioned between the first distribution group A and the second distribution group B and a lower lease tube 56 positioned between the second distribution group B and the third distribution group C And a lower lease tube 57 positioned between the lower lease tube 57 and the lower lease tube 57.

The first upper distribution baffle 51 and the first lower distribution baffle 53 may be provided in pairs such that no refrigerant is injected into the upper and lower lease tubes 56 and 57. As shown in FIGS. 2 and 3, the first upper distribution baffle 51 is installed at upper and lower portions of the upper lease tube 56 to block the refrigerant flow of the upper lease tube 56. The first lower distribution baffle 53 is also provided on the upper and lower portions of the lower lease tube 57.

The refrigerant tube 20 is preferably formed as long as possible to widen the heat exchange area between the refrigerant and the outside air. Therefore, the first header 41 and the second header 42 may be provided with at least one flow baffle 61, 62, 63 which can change the direction of flow of the refrigerant.

That is, the at least one flow baffle 61, 62, 63 includes a plurality of refrigerant tubes 20 belonging to the same dispensing group A, B, C, Group (a, b, c, d). The flow baffles 61, 62 and 63 are installed in at least one of the pair of the headers 41 and 42 and can block the longitudinal flow of the refrigerant flowing inside the header 41 and 42.

The plurality of flow groups a, b, c and d may comprise a first flow group a, a second flow group b, a third flow group c and a fourth flow group d . For this purpose, the flow baffles 61, 62 and 63 comprise a first flow baffle 61, a second flow group b and a third flow baffle 61 located between the first flow group a and the second flow group b, A second flow baffle 62 positioned between the flow groups c and a third flow baffle 63 positioned between the third flow group c and the fourth flow group d.

The baffle 50 may be provided alternately to the first header 41 and the second header 42 so that the refrigerant can pass through the heat exchanger 5 along the refrigerant tube 20 while changing the flow direction of the refrigerant . The first flow baffle 61 and the third flow baffle 63 may be installed in the first header 41 and the second flow baffle 62 may be installed in the second header 42.

3, the refrigerant introduced into the first header 41 through the first liquid refrigerant pipe 44 flows through the first upper distribution baffle 51 and the second upper distribution baffle 51, Flows into the second header 42 along the refrigerant tube 20 belonging to the first flow group (a) partitioned by the one-flow baffle 61. The refrigerant flows upward through the second upper distribution baffle 52 in the second header 42 and flows along the refrigerant tube 20 belonging to the second flow group b defined by the second flow baffle 62 And flows to the first header 41. The refrigerant flows back to the second header 42 along the third flow group c by the third flow baffle 63 in the first header 41 and flows along the fourth flow group d to the first header 42, 41, and exits the first header 41 through the first gas refrigerant pipe 43.

As shown in FIG. 3, the refrigerant entering the refrigerant liquid state through the liquid refrigerant pipes 44, 46, and 48 exits the gas refrigerant pipes 43, 45, and 47 through the heat exchange with the air in the state of the refrigerant gas. Conversely, when the refrigerant enters the gas refrigerant pipes 43, 45 and 47 and flows out to the liquid refrigerant pipes 44, 46 and 48 as shown in FIG. 2, the refrigerant gas changes phase to refrigerant liquid.

Since the refrigerant liquid has a smaller volume than the refrigerant gas of the same mass, the number of the refrigerant tubes 20 flowing through the refrigerant tube 20 can be reduced. The first flow group (a) through which the refrigerant containing a large amount of refrigerant flows has a small number of refrigerant tubes (20), and the fourth flow group (d) through which the refrigerant containing a large amount of refrigerant flows, And a refrigerant tube (20). That is, the heat exchanger 10 is arranged such that the number of the refrigerant tubes 20 increases sequentially from the first flow group a to the fourth flow group d.

A plurality of refrigerant tubes 20 belonging to one distribution group A, B, and C may be provided in the first flow group a in a number of 11% or more and 16% or less. The second flow group (b) may be provided in a number of 17% or more and 22% or less, and 26% or more and 29% or less may be provided in the third flow group (c). And the fourth flow group (d) may have a number of not less than 34% and not more than 46%. The heat exchanger 10 having such a ratio can distribute the refrigerant optimally and minimize the pressure loss.

For example, the total number of the plurality of refrigerant tubes 20 shown in Figs. 2 and 3 is 91. Fig. The three distribution groups A, B and C each comprise 29 refrigerant tubes and one lease refrigerant tube 56, 57 is provided between the distribution groups A, B, C, respectively. 29 refrigerant tubes belonging to one distribution group A, B and C are arranged in the first flow group a, 6 in the second flow group b, 8 in the third flow group c, , And 11 in the fourth flow group (d). At this time, the first flow group a occupies about 13.8% (4/29 * 100%), the second flow group b accounts for about 20.7%, the third flow group c, Is about 27.6%, and the fourth flow group (d) is about 37.9%.

FIG. 4 illustrates a heat exchanger 10 according to an embodiment of the present invention, and FIG. 5 illustrates a distributor 100 of a heat exchanger 10 according to an embodiment of the present invention.

The refrigerant is phase-changed while flowing along the refrigerant tube 20, and can radiate heat to the surroundings or absorb heat from the surroundings. The heat exchange fin 30 can be coupled to the refrigerant tube 20 so that the refrigerant can efficiently discharge or absorb heat. The heat exchange fin 30 may be joined to the outer surface of the refrigerant tube 20 to substantially increase the heat exchange area between the air and the refrigerant tube 20. [

The heat exchange fin 30 may be made of an aluminum alloy material having a high thermal conductivity. The heat exchange fin 30 may be provided in any form so that the refrigerant tube 20 can efficiently emit or absorb heat. For example, the heat exchange fins 30 may be spaced apart from each other at regular intervals in a direction perpendicular to the direction in which the refrigerant tubes 20 extend. In FIG. 4, the shape of the heat exchange fin 30 is simply shown, and the heat exchange fin 30 is not shown in FIGS. 2, 3, and 6 for convenience of explanation.

The first bracket 94 and the second bracket 92 may be installed in the first header 41 and the second header 42 for the installation of the heat exchanger 10. The heat exchanger 10 can be fixed to the indoor unit 200b or the outdoor unit 200a through the brackets 92 and 94. [ The first bracket 94 attached to the first header 41 connected to the refrigerant pipes 43, 44, 45, 46, 47 and 48 is connected to the refrigerant pipes 43, 44, 45, 46, 47, And may include a plurality of openings that can pass through.

A distributor 100 may be located at one side of the heat exchanger 10 to distribute the refrigerant to the heat exchanger 10. The distributor 100 may be connected to the plurality of liquid refrigerant pipes 44, 46, 48 so that the divided refrigerant flows into the heat exchanger 10, respectively. One side of the distributor 100 may be connected to the heat exchanger 10 by a plurality of liquid refrigerant pipes 44, 46 and 48 and the other side may be connected to the expansion valve 3 by the liquid pipe 70.

When the heat exchanger 10 is used as an evaporator, the liquid refrigerant pipes 44, 46 and 48 become inflow pipes, and the refrigerant can be moved from the expansion valve 3 to the heat exchanger 10. The refrigerant flowing into the distributor 100 through the liquid pipe 70 is distributed to the respective liquid refrigerant pipes 44, 46 and 48 and flows into the heat exchanger 10. The refrigerant that has moved through the refrigerant tubes 20 of the different distribution groups A, B and C escapes to the respective gas refrigerant tubes 43, 45 and 47 and rejoins through the steam pipe 72.

At this time, the respective liquid refrigerant pipes (44, 46, 48) may be provided with different lengths. The lengths of the liquid refrigerant pipes (44, 46, 48) can be adjusted to distribute the refrigerant at various flow rates according to the installation environment. A filter (not shown) is provided inside the distributor 100 to remove foreign matter from the refrigerant passing through the distributor 100.

FIG. 6 is a view showing distribution baffles 52 and 54, flow baffle 62, and flow velocity baffle 82 of the heat exchanger 10 according to one embodiment of the present invention, and FIG. 82 and 83 of the heat exchanger 10 according to the illustrative embodiment of the present invention.

As described above, at least one distribution baffle 52, 54 and a flow baffle 62 may be installed in the header 41, 42. 6 shows a second header 42 in which a second upper distribution baffle 52 and a second lower distribution baffle 54 are provided one by one and each distribution group A, A second flow baffle 62 is provided one by one. Hereinafter, for convenience of explanation, the second header 42 is referred to as a header.

The header 42 may also be provided with at least one flow rate baffle 82 located between the refrigerant tubes 20 belonging to the same flow group (a, b, c, d). The flow rate baffle 82 may block some of the longitudinal flow of the refrigerant unlike the distribution baffles 52 and 54 and the flow baffle 62 that completely block the longitudinal flow of the refrigerant flowing inside the header 42. That is, the flow rate baffle 82 is installed to reduce the effective cross-sectional area of the header 42 to increase the flow rate of the refrigerant.

The first flow rate baffle 81 shown in Fig. 7A includes a blocking wall portion 88 for blocking the longitudinal flow of the header 42 and a partition wall portion 88 formed in the blocking wall portion 88 so that the refrigerant can flow Hole 84. [ Further, it may include a stopper portion 87 protruding on both sides from the blocking wall portion 88 to limit the insertion depth of the first flow velocity baffle 81. The refrigerant can pass through the first flow rate baffle 81 only through the distribution hole 84, so that the flow rate increases.

The shape of the distribution hole 84 is not limited, and the number of the distribution holes 84 is not limited. FIG. 7 shows a first flow rate baffle 81, a second flow rate baffle 82 and a third flow rate baffle 83 having distribution holes 84, 85 and 86 of various shapes. This is merely an example, and the shapes of the distribution holes 84, 85, and 86 are not limited thereto. The first flow rate baffle 81 includes a circular first distribution hole 84 and the second flow rate baffle 82 has a rectangular second distribution hole 85 and the third flow rate baffle 83 has an elliptical And a third distribution hole (86).

The distribution holes 84,85 and 86 may be formed in the center as in the first distribution hole 84 and may be formed in one side as in the second distribution hole 85 and the third distribution hole 86 . Since the refrigerant tube 20 is coupled to one side of the header 42, the effective sectional area of the header 42 has a non-circular shape. Therefore, the distribution holes 84, 85, and 86 are formed to be opposed to each other to which the refrigerant tube 20 is coupled so that the refrigerant can pass through the shape of the distribution holes 84, 85, and 86.

6, the header 42 is provided with a plurality of baffle holes 96 through which distribution baffles 52, 54, flow baffles 62, and flow rate baffles 82 can be fitted. Each baffle can be fitted in a baffle hole 96 provided at a predetermined position.

In particular, the flow rate baffle 82 may be located between the refrigerant tubes 20 belonging to the fourth flow group d. The fourth flow group (d) including the largest number of refrigerant tubes (20) may not be able to distribute the refrigerant to each refrigerant tube (20) in a balanced manner. In particular, the refrigerant may be mainly distributed to the refrigerant tube 20 located at the upper portion of the fourth flow group d due to the moving speed of the refrigerant. Accordingly, at least one of the flow velocity baffles 82 is disposed between the refrigerant tubes 20 belonging to the fourth flow group d, so that the refrigerant can be distributed in a balanced manner by interfering with the movement of some refrigerants.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

1: air conditioner 10: heat exchanger
20: refrigerant tube 30: heat exchange pin
41, 42: header 43, 45, 47: gas refrigerant tube
44, 46, 48: liquid refrigerant pipes 51, 52, 53, 54: distribution baffle
56, 57: Lys refrigerant tube 61, 62, 63: Flow baffle
81, 82, 83: Flow rate baffle 100: Dispenser

Claims (15)

A plurality of refrigerant tubes;
A header coupled to both ends of the plurality of refrigerant tubes;
A plurality of inflow pipes installed at one side of the header, the refrigerant being distributed and introduced;
A plurality of outflow pipes installed corresponding to the plurality of inflow pipes so that the refrigerant introduced through the plurality of inflow pipes is respectively discharged through the refrigerant tubes of different distribution groups;
≪ / RTI > The method according to claim 1,
A plurality of refrigerant tubes are divided into a plurality of distribution groups each including one inlet pipe and one outlet pipe,
And at least one distribution baffle installed in the header. 3. The method of claim 2,
A plurality of refrigerant tubes belonging to the same distribution group,
So that the refrigerant flows in the same direction and is divided into a plurality of adjacent flow groups,
And at least one flow baffle installed in the header. The method of claim 3,
One distribution group is divided into a first flow group, a second flow group, a third flow group, and a fourth flow group,
The flow baffle,
A first flow baffle located between the first flow group and the second flow group,
A second flow baffle positioned between the second flow group and the third flow group,
And a third flow baffle positioned between the third flow group and the fourth flow group. 5. The method of claim 4,
A plurality of refrigerant tubes belonging to one distribution group,
To the first flow group, 11% or more, 16% or less,
In the second flow group, 17% or more, 22% or less,
26% or more, 29% or less,
And the fourth flow group is provided in a number of 34% or more and 46% or less. The method of claim 3,
In order to increase the flow rate of the refrigerant by reducing the effective cross-sectional area of the header,
And at least one flow velocity baffle located between the refrigerant tubes belonging to the same flow group. The method according to claim 1,
To prevent heat transfer between different dispensing groups,
Said plurality of refrigerant tubes comprising a less refrigerant tube located between dispensing groups. The method according to claim 1,
And a distributor connected to the plurality of inflow pipes and distributing the refrigerant. 9. The method of claim 8,
Wherein the plurality of inlet pipes connecting the distributor and the heat exchanger are provided with different lengths. 1. An air conditioner comprising: a compressor for compressing a refrigerant gas; and an expansion valve for expanding the refrigerant liquid,
A heat exchanger including a plurality of refrigerant tubes and a pair of headers coupled to both ends of the plurality of refrigerant tubes;
A distributor disposed between the expansion valve and the heat exchanger for distributing the refrigerant;
And an air conditioner. 11. The method of claim 10,
And a refrigerant circulating through the distributor is introduced into the heat exchanger,
And a plurality of inflow pipes connecting the distributor and the heat exchanger. 12. The method of claim 11,
The plurality of refrigerant tubes are divided into a plurality of distribution groups each having an inlet pipe and an outlet pipe,
Wherein the heat exchanger comprises at least one distribution baffle mounted in the header. 13. The method of claim 12,
The at least one distribution baffle is configured to allow refrigerant to flow through a refrigerant tube belonging to a different dispensing group,
Wherein the air conditioner is installed in each of the pair of headers. 13. The method of claim 12,
To divide a plurality of refrigerant tubes belonging to the same distribution group into a plurality of flow groups adjacent to each other and flowing in the same direction,
Wherein the heat exchanger comprises at least one flow baffle mounted in the header. 15. The method of claim 14,
Wherein the at least one flow baffle is configured to allow refrigerant to circulate through the pair of headers,
Wherein the air conditioner is installed in at least one of the pair of headers.

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