KR101462176B1 - Heat exchanger - Google Patents

Abstract

According to the present invention, a heat exchanger includes a plurality of horizontally arranged tubes; a pair of vertical headers; and one or more flow distribution baffle mounted on an inlet side header in one tube group among the plurality of tube groups to be placed among the tubes in the group, and having one or more distribution holes passing refrigerant, thereby preventing an unbalance in refrigerant distribution even when the heat exchanger is operated as an evaporator of an outdoor unit.

Description

Heat Exchanger {HEAT EXCHANGER}

The present invention relates to a heat exchanger having a vertical header with improved distribution performance of the refrigerant.

In general, a heat exchanger includes tubes for flowing refrigerant therein and exchanging heat with outside air, heat exchange fins for contacting the tubes to widen the heat dissipation area, and both ends of the tubes communicating with each other to guide the refrigerant to the tubes, And is a device for exchanging heat between the refrigerant and the outside air.

The heat exchanger is mainly composed of a Fin tube type in which a copper heat transfer tube is inserted into a thin film heat exchange fin of an aluminum material and a heat exchange fin are disposed between aluminum tubes having a plurality of micro channels, There is a parallel flow type supported by a pair of headers, and the parallel flow type is known to be relatively inexpensive and highly efficient.

However, the vertical flow header parallel flow type heat exchanger is used as an evaporator of an outdoor unit, the balance of the refrigerant distribution distributed to the tubes in the vertical header is broken due to the difference in physical properties depending on the gravity and the phase of the refrigerant, And is mainly used as a condenser of an outdoor unit.

One aspect of the present invention discloses a parallel flow type heat exchanger having a vertical header in which refrigerant flowing into a header is evenly distributed to tubes even when operated as an evaporator of an outdoor unit, so that heat exchange performance is not degraded.

According to an aspect of the present invention, there is provided a heat exchanger including: a plurality of tubes disposed horizontally; a heat exchange fin in contact with the plurality of tubes; a first header vertically disposed so that one ends of the plurality of tubes communicate with each other; A second header vertically disposed so that the other ends of the plurality of tubes communicate with each other; a second header mounted on at least one of the first header and the second header, (N > = 2, n is an even number) grouping the plurality of tubes adjacent to each other and flowing the refrigerant in the same direction, baffler; And at least one flow distribution baffle mounted to be positioned between the tubes belonging to the group and having at least one distribution hole for passing refrigerant, in an inlet header of any one of the n groups; .

Here, the at least one flow distribution baffle may be mounted such that among the n groups, the heat exchanger is located between the tubes belonging to the last group positioned according to the direction of flow of the refrigerant when operating as an evaporator.

The at least one distribution hole may be spaced from the inner side of the header opposite the tube so that the flow of refrigerant flowing along the inner side opposite to the tube of the header is blocked.

In addition, the cross-section of the at least one distribution hole may have any one of a polygonal shape, a circular shape, or various other closed shape shapes.

In addition, the sum of the cross-sectional areas of the at least one distribution hole may be 1 to 40% of the cross-sectional area of the inner space of the header.

Further, the groups may each have 2 to 15 tubes.

In addition, n = 4, the number of flow path forming baffles is three, and the plurality of tubes may be divided into four groups.

In addition, an inlet pipe and an outlet pipe may be provided in any one of the first header and the second header, and the flow distribution baffle may be installed in the other header of the first header and the second header. have.

In addition, when the heat exchanger operates as an evaporator, the refrigerant flows upward in the first header and the second header, and when the heat exchanger operates as a condenser, the refrigerant flows in the first header and the second header The refrigerant can flow downward.

Further, the heat exchanger is disposed in an inlet header of any one of the n groups, and the group and the heat exchanger are positioned between the group positioned immediately in front of the group in accordance with the flow direction of the refrigerant when operating the evaporator And at least one flow amplification baffle mounted with the at least one booster hole for allowing the refrigerant to pass therethrough.

Wherein the at least one flow amplifying baffle includes a group in which the heat exchanger is positioned last in accordance with a flow direction of the refrigerant when operated as an evaporator and a group positioned immediately before the group positioned at the last position, As shown in Fig.

In addition, the cross section of the at least one booster hole may have any one of a polygonal shape, a circular shape, and various other shapes of a closed shape.

In addition, the total sum of the cross sectional areas of the at least one boosting holes may be 5 to 70% of the cross sectional area of the inner spaces of the header.

In addition, the total sum of the cross sectional areas of the at least one booster holes may be greater than the sum of the cross sectional areas of the at least one distribution hole.

According to another aspect of the present invention, there is provided a heat exchanger including: a plurality of tubes arranged horizontally; a heat exchange fin in contact with the plurality of tubes; A second header disposed vertically so that the other ends of the plurality of tubes communicate with each other; and a second header mounted on at least one of the first header and the second header, (N - 1), which divides the refrigerant into a group of n (n ≥ 2, n is an even number) group which forms a refrigerant flow path by shutting off the flow of the refrigerant and flows the refrigerant in the same direction, Baffle with four flow channels; And an inlet header mounted in an inlet header of any one of the n groups such that the group and the heat exchanger are positioned between a group positioned immediately in front of the group according to a flow direction of the refrigerant in operation with the evaporator, At least one flow amplification baffle having at least one booster hole therethrough; .

Wherein the at least one flow amplifying baffle includes a group in which the heat exchanger is positioned last in accordance with a flow direction of the refrigerant when operated as an evaporator and a group positioned immediately before the group positioned at the last position, As shown in Fig.

In addition, the cross section of the at least one booster hole may have any one of a polygonal shape, a circular shape, and various other shapes of a closed shape.

The at least one distribution hole includes not only a hole formed inside the flow distribution baffle but also a hole formed between the flow distribution baffle and the inner surface of the header by mounting the flow distribution baffle to the header can do.

In addition, the total sum of the cross sectional areas of the at least one boosting holes may be 5 to 70% of the cross sectional area of the inner spaces of the header.

In addition, the total sum of the cross sectional areas of the at least one booster holes may be greater than the sum of the cross sectional areas of the at least one distribution hole.

According to another aspect of the present invention, there is provided a heat exchanger including: a plurality of tubes disposed horizontally; a heat exchange pin contacting the plurality of tubes; a plurality of tubes disposed vertically so that one ends of the plurality of tubes are communicated, A first header provided with an inlet pipe and an outlet pipe, a second header vertically arranged so that the other ends of the plurality of tubes communicate with each other, and at least one of the first header and the second header And at least one flow path for separating the plurality of tubes into a plurality of groups adjacent to each other and flowing the refrigerant in the same direction, Forming baffle; And a supply section for supplying the refrigerant to tubes belonging to the group positioned at the uppermost position among the plurality of groups into an upper section in which at least a part of the tubes communicate with a lower section in which at least another part communicates with the lower section, At least one flow distribution baffle mounted to the second header and having at least one distribution hole through which the refrigerant passes; Wherein a portion of the refrigerant directed from the lower section to the upper section passes through the at least one distribution hole and is distributed to tubes communicating with the upper section and the remaining portion does not pass through the at least one distribution hole And can be dispensed to the tubes that communicate with the lower section.

Here, the heat exchanger is provided between the supply section and the inflow section located below the supply section so as to receive the coolant from the tubes belonging to the group positioned immediately below the group located at the uppermost position among the plurality of groups Further comprising a flow amplification baffle mounted to the second header and having at least one booster hole through which the refrigerant passes, wherein the pressure of the inlet section is amplified to flow through the at least one booster hole The flow rate of the refrigerant toward the supply section can be amplified.

According to the idea of the present invention, even when the heat exchanger of the parallel flow type having the vertical header operates as the evaporator of the outdoor unit, the distribution of the refrigerant from the header to the tubes is balanced, so that the heat exchange performance is not deteriorated.

Therefore, even when a parallel-flow type heat exchanger having a vertical header is used as an outdoor unit of a heat pump type air-conditioning and heating system, the cooling and heating efficiency are not varied, and the performance can be evened.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing an appearance of a heat exchanger according to an embodiment of the present invention; FIG.
Fig. 2 is an exploded view of the configuration of a second header of the heat exchanger of Fig. 1; Fig.
3 is an exploded view of the configuration of a first header of the heat exchanger of FIG.
Figure 4 is a front view of the heat exchanger of Figure 1;
Fig. 5 is a view showing a main part of the heat exchanger of Fig. 1; Fig.
6 is a sectional view taken along the line I-I in Fig.
7-11 are cross-sectional views of a flow distribution baffle in accordance with further embodiments of the present invention.
Figure 12 is a cross-sectional view of the flow amplification baffle of the heat exchanger of Figure 1;
13 is a cross-sectional view of a header and a flow distribution baffle in accordance with another embodiment of the present invention.
FIG. 14 is a general refrigerant flow diagram of an air conditioning system according to an embodiment of the present invention. FIG.
15 is a flow chart of the refrigerant when the heat exchanger of Fig. 1 operates as a condenser.
16 is a flow chart of the refrigerant when the heat exchanger of Fig. 1 operates as an evaporator;

Hereinafter, preferred embodiments according to the present invention will be described in detail.

FIG. 1 is a view showing an outer appearance of a heat exchanger according to an embodiment of the present invention, FIG. 2 is an exploded view of the configuration of a second header of the heat exchanger of FIG. 1, Fig. 5 is a diagram showing the configuration of the first header of Fig.

1 to 3, the heat exchanger 10 according to the embodiment of the present invention is a parallel flow type having a vertical header. The heat exchanger 10 has a structure in which the refrigerant flows inside and horizontally A pair of headers (20, 30) guiding the refrigerant to the plurality of tubes (60) and vertically arranged to communicate with the plurality of tubes (60), a plurality And a heat exchange fin (50) in contact with the tubes (60).

The plurality of tubes 60 may each be formed in a flat shape of an aluminum material, and a plurality of microchannels 61 through which refrigerant can flow may be formed. The plurality of tubes 60 are horizontally disposed to be spaced apart from one another by a predetermined distance.

The heat exchange fin 50 may have various shapes that enlarge the heat transfer area and facilitate drainage of the condensed water, and may be made of aluminum material. The heat exchange fin 50 is provided between the plurality of tubes 60 and can be brazed to the plurality of tubes 60.

The pair of headers 20 and 30 may be vertically disposed to be spaced apart from each other with a plurality of tubes 60 therebetween. For convenience, the header 20 disposed on the right side of the tubes 60 in FIG. 1 is referred to as a first header 20, and the header 30 disposed on the left side is referred to as a second header 30.

The first header 20 and the second header 30 may have a cylindrical shape having a space formed therein. Accordingly, the cross section of the first header 20 and the second header 30 has a substantially circular shape, but is not limited thereto, and may have a substantially "D" shape or various other shapes.

The first header 20 and the second header 30 each have cylindrical bodies 21 and 31 having internal spaces 22 and 32 and open at both ends, The upper and lower caps 25 and 35 and the lower caps 26 and 36 may be combined to cover both ends. The body portions 21 and 31, the upper caps 25 and 35, and the lower caps 26 and 26 are all made of aluminum and can be brazed together.

On one side of the body portions 21 and 31, tube insertion grooves 23 and 33 into which a plurality of tubes 60 can be inserted are formed. Both ends of the plurality of tubes 60 can be brazed after being inserted into the tube insertion grooves 23 and 33, respectively. This allows the microchannels 61 of the plurality of tubes 60 to communicate with the internal spaces 22 and 32 of the first and second headers 20 and 30 and the refrigerant is introduced into the header 20, And the tubes 60, as shown in Fig.

Baffle insertion grooves 24 and 34 into which various baffles 70, 80, 90 and 100 can be inserted are formed on the other side surfaces of the body portions 21 and 31, respectively. The flow path forming baffles 70 are inserted into the baffle insertion grooves 24 of the first header 20 and the flow path forming baffle 70 is inserted into the baffle insertion grooves 34 of the second header 30, The amplification baffle 100 and the channel distribution baffles 80, 90 can be inserted.

The detailed configuration and function of the flow path formation baffle 70, the flow rate amplification baffle 100, and the flow path distribution baffles 80 and 90 will be described later. These baffles 70,80,90,100 can be inserted into the baffle insertion grooves 24 of the first header 20 or the second header 30 in the direction from the outside to the inside of the heat exchanger 10 .

The baffles 70, 80, 90, and 100 are all made of aluminum and can be brazed after being inserted into the baffle insertion grooves 24.

Meanwhile, the first header 20 may be provided with an inlet pipe 27 and an outlet pipe 28 through which the refrigerant can flow. The inlet pipe 27 may be provided at the lower portion of the first header 20 and the outlet pipe 28 may be provided at the upper portion of the first header 20.

The liquid or gaseous refrigerant can be introduced through the inlet pipe 27 when the heat exchanger 10 of the present embodiment is operated by the evaporator of the outdoor unit. The introduced refrigerant passes through the plurality of tubes 60, takes the heat of the outside air, evaporates, and can be discharged through the outlet pipe 28 in a gaseous state.

When the heat exchanger 10 of the present embodiment is operated as a condenser of an outdoor unit, refrigerant in a gaseous state can be flowed through the outlet pipe 28 on the contrary. The introduced refrigerant passes through the plurality of tubes (60) and is taken out of the outside air, condensed, and then can flow out through the inlet pipe (27) in a liquid state.

 As described above, the heat exchanger 10 according to the embodiment of the present invention is a parallel flow type heat exchanger that can be operated as an evaporator and a condenser of an outdoor unit and has vertical headers 20 and 30. Particularly, the flow rate distribution baffles 80 and 90 and the flow rate amplification baffle 100 provided in the second header 30 are arranged such that when the heat exchanger 10 operates as an evaporator of an outdoor unit, Thereby enhancing heat exchange efficiency.

The configuration and function of the flow path formation baffle 70, the flow distribution baffles 80 and 90, and the flow rate amplification baffle 100 will be described in detail below.

FIG. 4 is a front view of the heat exchanger of FIG. 1, FIG. 5 is a view showing a substantial part of the heat exchanger of FIG. 1, and FIG. 6 is a sectional view taken along the line I-I of FIG. Figures 7-11 are cross-sectional views illustrating a flow distribution baffle in accordance with further embodiments of the present invention. Figure 12 is a cross-sectional view of the flow amplification baffle of the heat exchanger of Figure 1; 13 is a cross-sectional view illustrating a header and a flow distribution baffle according to another embodiment of the present invention.

The arrows shown in Figs. 4 and 5 show the flow of the refrigerant when the heat exchanger 10 is operated as an evaporator of the outdoor unit.

4 to 6, two flow path forming baffles 70 are mounted on the first header 20 and one flow path forming baffles 70 is mounted on the second header 30. As shown in FIG. Therefore, the heat exchanger 10 is provided with three flow path forming baffles 70, and the three flow path forming baffles 70 are arranged at different heights.

The three flow path forming baffles 70 block the flow of refrigerant along the longitudinal direction of the header 20, 30 within the header 20, respectively. Therefore, the refrigerant flowing into the first header 20 through the inlet pipe 27 provided at the lower portion of the first header 20 flows through the first header 20, (60) and the second header (30) repeatedly.

That is, the flow path forming baffles 70 form a flow path of the refrigerant. At this time, the plurality of tubes 60 are classified into a plurality of groups A, B, C, and D that are adjacent to each other and flow the refrigerant in the same direction.

In this embodiment, the plurality of tubes 60 are disposed adjacent to each other at the lowest and one group (hereinafter referred to as " A ") for flowing the refrigerant in the direction of the second header 30 from the first header 20 (Hereinafter referred to as a group B), which are disposed adjacent to each other on the A group of tubes and flow the refrigerant in the direction of the first header 20 from the second header 30 And another group (hereinafter referred to as a C group) which is disposed adjacent to the tubes of the B group and flows the refrigerant again from the first header 20 to the second header 30 And another group (hereinafter referred to as D group) disposed adjacent to each other on the C group of tubes and for flowing the refrigerant from the second header 30 to the first header 20 again, Of tubes. Where each group preferably has 2 to 15 tubes.

Thus, in the present embodiment, the heat exchanger 10 has three flow path forming baffles 70, and the three flow path forming baffles 70 divide the plurality of tubes 60 into four groups .

If the number of the flow path forming baffles 70 is n - 1 in the structure in which both the inlet pipe 27 and the outlet pipe 28 are provided in the first header 20 among the pair of the headers 20 and 30 The number of tube groups is n, and n is an even number greater than 2.

The idea of the present invention is not limited to the number of flow path forming baffles 70 and the number of tube groups, and the number of flow path forming baffles 70 may be smaller or larger than three according to design specifications. The number may be less or more than four.

In summary, the heat exchanger according to the present invention includes n-1 flow paths for dividing the plurality of tubes 60 into groups of n (n > = 2, n = even) Forming baffle.

On the other hand, the flow distribution baffles 80, 90 are for distributing the refrigerant inside the header 30 evenly to the tubes 60. In this embodiment, two flow distribution baffles 80, 90 < / RTI >

However, the number of flow distribution baffles is not limited, and only one flow distribution baffle may be provided, or three or more flow distribution baffles may be provided depending on various specifications such as the number and length of the tubes 60 and the pressure of the refrigerant. .

Since the shape and function of the two flow distribution baffles 80 and 90 of this embodiment are substantially identical, only the flow distribution baffle 80 disposed below the two flow distribution baffles 80 and 90 will be described below Description of the remaining portions will be omitted.

6, the flow distribution baffle 80 is provided perpendicular to the longitudinal direction of the header so that the refrigerant flows along the longitudinal direction of the header inside the header A distribution hole 81 formed in the blocking wall 89 so as to allow the refrigerant to flow along the longitudinal direction of the header inside the header and an insertion depth of the flow distribution baffle 80 And a stopper portion 88 protruding from the blocking wall portion 89 at both sides thereof.

The blocking wall 89 is provided in close contact with the inner surface of the header so as to block the flow of the refrigerant and the refrigerant directed to the flow distribution baffle 80 can pass through the distribution distribution baffle 80 only through the distribution hole 81 .

In particular, the distribution hole 81 should be spaced a predetermined distance G from the opposite side 37 of the header tube so as to block the flow of liquid refrigerant flowing on the opposite inner side 37 of the tube of the header do.

On the other hand, the shape of the distribution hole 81 is not limited. Also, the number is not limited. That is, although the distribution hole shown in Fig. 6 has a rectangular cross section, it is not limited thereto. As an example, as shown in FIG. 7, the flow distribution baffle 82 may have a distribution hole 82a having a circular cross-section. Also, as shown in Figure 8, the flow distribution baffle 83 may have a distribution hole 83a having a plurality of slit-shaped cross-sections. 9, the flow distribution baffle 84 may have a distribution hole 84a having a cross-section of another closed shape that is not also a circular square. Also, as shown in FIG. 10, the flow distribution baffle 85 may have a porous distribution hole 85a.

Furthermore, the distribution holes of the flow distribution baffle 82 according to the spirit of the present invention are not limited to the holes formed inside the flow distribution baffle 82, as well as the flow distribution baffle 82, And a hole formed between the header and the header.

11, a flow distribution baffle 86 is formed between the one side 86b of the flow distribution baffle 82 and the inner side 38 of the header 31 by being mounted on the header 31 The hole 86a is also included in the distribution hole 86a of the flow distribution baffle 86. [

It should be understood that the flow distribution baffle 80 of the present invention is not only applied to a case where the cross section of the header is circular, but of course also applicable to the header having a cross section other than the round shape.

13, the flow distribution baffle 87 in which the distribution hole 87a is formed can be mounted even when the cross section of the header 39 is substantially a "D" -shape.

On the other hand, the sum of the cross sectional areas of at least one distribution hole 81 of the flow distribution baffle 80 is preferably 1 to 40% of the cross sectional area of the inner space of the header.

The mounting position and function of the flow distribution baffle 80 will be described with reference to FIG.

First, for convenience of explanation, a portion for supplying the refrigerant to the tubes of the group D in the inner space of the second header 30 is referred to as a supply section 40. Accordingly, the supply section 40 is defined by the inner space of the second header at its lower end by the flow amplification baffle 100, and its upper end by the upper cap 35. [

Generally, the upward flow of refrigerant in the feed section 40 is fast. In particular, the liquid refrigerant rises rapidly on the inner side opposite to the tube 60 of the second header 30. Thus, the refrigerant is not evenly distributed to the tubes of the group D in the supply section 40. That is, the refrigerant is mainly distributed to the tubes located above the tubes of the group D, and the refrigerants are hardly distributed to the tubes located below the tubes of the group D.

The flow distribution baffle 80 in accordance with an embodiment of the present invention is mounted to this feed section 40 to serve to distribute the refrigerant in the feed section 40 to all the tubes of the D group in a balanced manner.

Specifically, the flow distribution baffle 80 is mounted in the second header 30 such that it is positioned between the D group of tubes. Here, the fact that the flow distribution baffle 80 is located between the tubes of group D means that at least one of the tubes of group D is located above the flow distribution baffle 80 and the lower part of the flow distribution baffle 80 Means that at least one of the tubes of the group D is located.

The feed section 40 is divided into two spaces by a flow distribution baffle 80. For convenience of explanation, the space above the flow distribution baffle 80 is referred to as the upper section 41 and below the flow distribution baffle 80 Is called a lower section (42).

The flow of refrigerant in the feed section 40 is an upward flow, and the refrigerant flows from the lower section 42 to the upper section 41. At this time the flow of refrigerant from the lower section 42 to the upper section 41 is greater than the flow distribution baffle 80 because the flow distribution baffle 80 is mounted between the lower section 42 and the upper section 41. [ And a part thereof flows into the upper section 41 through the distribution hole 81 and the remaining part flows horizontally into the tubes that are not communicated through the distribution hole 81 and eventually communicate with the lower section 42 .

Particularly, as described above, the liquid refrigerant rapidly rises mainly on the inner side opposite to the tube of the header, and the rise of the liquid refrigerant is blocked by the flow distribution baffle 80 so that the mixing of the refrigerant in the lower section 42 An effect that can be achieved also occurs.

With such a construction, the flow distribution baffle 80 can improve the distribution of the refrigerant from the header 30 to the tubes 60.

In this embodiment, the flow distribution baffle 80 is mounted on top of the second header that is in communication with the D group of tubes, but is not limited to this, and the flow rate of the refrigerant may be fast according to the specifications of the heat exchanger, It is of course possible to mount it on any part which does not.

The flow rate amplifying baffle 100 is for improving the speed of the refrigerant in the header 30 to improve the distribution of the refrigerant. In the present embodiment, one flow velocity amplifying baffle 100) was mounted.

However, the number of the flow amplifying baffles 100 is not limited to two, and may be two or more according to various specifications of the heat exchanger, or omitted if unnecessary.

12, the flow amplifying baffle 100 has at least one booster hole 101 through which the refrigerant is passed, and is substantially similar to the flow distribution baffle 80 .

However, it is preferable that the sum of the cross sectional areas of at least one booster hole 101 of the flow amplification baffle 100 occupies 5 to 70% of the cross sectional area of the inner space of the header. The total sum of the cross sectional areas of the at least one booster hole 101 of the flow amplifying baffle 100 is set larger than the sum of the cross sectional areas of at least one of the distribution holes 81 of the flow distribution baffle 80. [

The shape of the boosting hole 101 of the flow velocity amplification baffle 100 is not limited. On the other hand, the boosting hole 101 of the flow amplification baffle 100 does not necessarily have to be spaced from the inner side of the opposite side of the tube of the header, unlike the distribution hole 81 of the flow distribution baffle 80.

With reference to Fig. 5, the mounting position and function of the flow amplification baffle 100 will be described.

For convenience of explanation, a portion of the second header 30 located below the supply section 40 and supplied with refrigerant from the tubes of the group C is referred to as an inlet section 43.

The flow amplification baffle 100 is mounted to the second header 30 to be positioned between the feed section 40 and the inlet section 43. That is, the flow amplification baffle 100 is mounted to the second header 30 to be positioned between the D group of tubes and the C group of tubes.

The refrigerant in the inlet section 43 flows upward toward the supply section 40 by the pressure of the refrigerant flowing from the C group tubes. The flow of the refrigerant from the inlet section 43 to the supply section 40 is controlled by the flow amplifying baffle 100 so that the flow of the refrigerant from the inlet section 43 to the supply section 40 is stopped, The pressure of the refrigerant in the inlet section 43 is increased.

Thus, the refrigerant in the inlet section 43 passes through the boosting hole 101 of the flow amplifying baffle 100, so that the flow rate is amplified and flows into the supply section 40.

As described above, the flow rate amplification baffle can accelerate the speed of the refrigerant when the speed of the refrigerant in the header 30 is low and the refrigerant can not be sufficiently supplied to the upper end of the header 30 and is pushed downward. Therefore, the flow rate amplifying baffle may not be necessary under the condition that the refrigerant is sufficiently supplied to the upper end.

FIG. 14 is a flow chart of the entire refrigerant of the cooling / heating system according to the embodiment of the present invention, FIG. 15 is a flow chart of the refrigerant when the heat exchanger of FIG. 1 operates as a condenser, It is a flow chart of the refrigerant.

14 to 16, the operation of the air conditioning system in which the heat exchanger of the present invention is used will be described.

The bidirectional heat pump cooling and heating system is composed of an outdoor unit 1 and an indoor unit 2. The outdoor unit 1 includes a first heat exchanger 10 according to an embodiment of the present invention, a compressor 3 for compressing refrigerant, , An expansion device (4) for expanding the refrigerant, and a switching valve (5) for switching the flow path of the refrigerant. The indoor unit (5) may include a second heat exchanger (5).

In the cooling mode, the refrigerant flows along the solid line in turn through the compressor 3, the first heat exchanger 10, the expansion device 4, and the second heat exchanger 5. Thus, the first heat exchanger 10 operates as a condenser and the second heat exchanger 5 operates as an evaporator.

As shown in FIG. 15, in the cooling mode, the high-temperature and high-pressure gas refrigerant compressed in the compressor 3 flows into the outlet pipe 28 of the first heat exchanger 10. The introduced refrigerant flows downward in the form of a jig jig while heat is taken away from the outside air, and the condensed and condensed refrigerant flows out through the inlet pipe 27.

In the heating mode, the refrigerant flows through the compressor 3, the second heat exchanger 5, the expansion device 4, and the first heat exchanger 10 in order along the dotted line. Thus, the first heat exchanger 10 operates as an evaporator and the second heat exchanger 5 operates as a condenser.

16, the liquid or gaseous refrigerant expanded in the expansion device 4 at low temperature and low pressure flows into the inlet pipe 27 of the first heat exchanger 10 in the heating mode. The introduced refrigerant flows upward in the form of a zigzag, while taking out the heat of the outside air and evaporated, and the evaporated refrigerant flows out through the outlet pipe 28.

The parallel flow type first heat exchanger 10 having a vertical header may cause a distribution imbalance of the refrigerant due to the physical properties of the liquid refrigerant and gravity during operation of the evaporator.

Particularly, the flow rate of the refrigerant rising in the second header 30 may be so high that the refrigerant tends to be pushed to the upper end of the second header 30. In the second header 30 of the first heat exchanger 10, At least one flow distribution baffle 80, 90 may be mounted to prevent imbalance.

The second header 30 of the first heat exchanger 10 may not be sufficiently supplied with the refrigerant because the flow rate of the refrigerant rising in the second header 30 is too slow to supply the refrigerant to the upper end of the second header 30. [ At least one flow amplification baffle 100 may be mounted to prevent imbalance.

Accordingly, even when the first heat exchanger 10 operates as the evaporator of the outdoor unit, the refrigerant is smoothly distributed, so that the imbalance between the cooling mode and the heating mode performance of the heat pump cooling and heating system can be solved.

Although the technical idea of the present invention has been described above with reference to specific embodiments, the scope of rights of the present invention is not limited to these embodiments.

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 present invention as defined by the appended claims and their equivalents.

1: outdoor unit 2: indoor unit
3: compressor 4: expansion device
5: Switching valve 10, 11: Heat exchanger
20: first header 21:
22: inner space 23: tube insertion groove
24: baffle insertion groove 25: upper cap
26: lower cap 27: inlet pipe
28: outlet pipe 30,39: second header
31: Body part 32: Inner space
33: tube insertion groove 34: baffle insertion groove
35: upper cap 36: lower cap
37: Inner side in the direction opposite to the tubes 38: Inner side in the direction facing the tubes
40: supply section 41: upper section
42: lower section 43: inlet section
50: heat exchange fin 60: tubes
61: microchannels 70: flow path forming baffle
80,82,83,84,85,86,87: Flow distribution baffle
81, 82a, 83a, 84a, 85a, 86a, 87a:
86b: distribution hole forming surface 87: stopper portion
88: blocking wall 90: flow distribution baffle
91: Distribution hole 100: Flow rate amplification baffle
101: Boosting Hall A, B, C, D: Group of tubes
G: Spacing

Claims (22)

A plurality of tubes arranged horizontally;
A heat exchange fin in contact with said plurality of tubes;
A first header vertically disposed so that one ends of the plurality of tubes communicate with each other;
A second header vertically disposed so that the other ends of the plurality of tubes communicate with each other;
The refrigerant flow path is formed by blocking the flow of the refrigerant along the longitudinal direction inside the header, and the plurality of tubes are disposed adjacent to each other in the same direction (N - 1) flow-forming baffles that divide the refrigerant into n groups (n > = 2, and n is an even number)
At least one flow distribution baffle mounted to be positioned between the tubes belonging to said group and having at least one distribution hole for passing refrigerant, in an inlet header of any one of said n groups; And
And a boosting hole mounted on the first header or the second header so as to be positioned between any two groups out of the n groups and allowing the refrigerant to pass therethrough, the pressure of the upstream space being increased with respect to the boosting hole A flow rate amplifying baffle for increasing the flow rate of the refrigerant passing through the booster hole; ≪ / RTI > The method according to claim 1,
Wherein the at least one flow distribution baffle is mounted such that the heat exchanger among the n groups is positioned between tubes belonging to the group last placed along the direction of flow of the refrigerant in operation as an evaporator . The method according to claim 1,
Wherein the at least one distribution hole is spaced from an inner side of the header opposite the tube so that a flow of refrigerant flowing along the inner side opposite to the tube of the header is blocked. The method according to claim 1,
Wherein the cross section of the at least one distribution hole has a shape selected from the group consisting of polygonal, circular, or other various closed shapes. The method according to claim 1,
The at least one distribution hole includes not only a hole formed inside the flow distribution baffle but also a hole formed between the flow distribution baffle and the inner surface of the header by mounting the flow distribution baffle to the header Features a heat exchanger. The method according to claim 1,
Wherein the sum of the cross-sectional areas of the at least one distribution hole is 1 to 40% of the cross-sectional area of the inner space of the header. The method according to claim 1,
Said groups each having 2 to 15 tubes. The method according to claim 1,
Wherein n = 4, the number of flow path forming baffles is three, and the plurality of tubes are divided into four groups. The method according to claim 1,
Wherein an inlet pipe and an outlet pipe are provided in any one of the first header and the second header,
Wherein the flow distribution baffle is mounted in the header of the other of the first header and the second header. The method according to claim 1,
When the heat exchanger operates as an evaporator, the refrigerant flows upward in the first header and the second header,
Wherein when the heat exchanger operates as a condenser, the refrigerant flows downward within the first header and the second header. delete The method according to claim 1,
Wherein the at least one flow amplification baffle is configured such that the heat exchanger among the n groups is disposed between a group positioned last in the direction of flow of the refrigerant when operated as an evaporator and a group positioned immediately before the group positioned at the last position And is mounted so as to be positioned. The method according to claim 1,
Wherein the cross-section of the at least one booster hole has a shape selected from the group consisting of polygonal, circular, or other various closed shapes. The method according to claim 1,
Sectional area of the at least one booster hole is 5 to 70% of the cross-sectional area of the inner space of the header. The method according to claim 1,
Wherein the sum of the cross sectional areas of the at least one booster holes is greater than the sum of the cross sectional areas of the at least one distribution hole. A plurality of tubes arranged horizontally;
A heat exchange fin in contact with said plurality of tubes;
A first header vertically disposed so that one ends of the plurality of tubes communicate with each other;
A second header vertically disposed so that the other ends of the plurality of tubes communicate with each other;
The refrigerant flow path is formed by blocking the flow of the refrigerant along the longitudinal direction inside the header, and the plurality of tubes are disposed adjacent to each other in the same direction (N > = 2, n is an even number) groups for flowing the refrigerant into the first header and the second header, respectively, and supplying the refrigerant to the plurality of tubes, An n - 1 passage forming baffle partitioning the refrigerant into an inlet section through which the refrigerant flows from the plurality of tubes; And
At least one flow amplification baffle mounted between the inlet section and the feed section of the header to be positioned between any two of the n groups and having at least one booster hole for passing refrigerant therethrough; ≪ / RTI > 17. The method of claim 16,
Wherein the at least one flow amplification baffle is configured such that the heat exchanger among the n groups is disposed between a group positioned last in the direction of flow of the refrigerant when operated as an evaporator and a group positioned immediately before the group positioned at the last position And is mounted so as to be positioned. 17. The method of claim 16,
Wherein the cross-section of the at least one booster hole has a shape selected from the group consisting of polygonal, circular, or other various closed shapes. 17. The method of claim 16,
Sectional area of the at least one booster hole is 5 to 70% of the cross-sectional area of the inner space of the header. 17. The method of claim 16,
Wherein the sum of the cross sectional areas of the at least one booster holes is greater than the sum of the cross sectional areas of the at least one distribution hole. A plurality of tubes arranged horizontally;
A heat exchange fin in contact with said plurality of tubes;
A first header vertically disposed so that one ends of the plurality of tubes communicate with each other;
A second header vertically disposed so that the other ends of the plurality of tubes communicate with each other;
The refrigerant flow path is formed by blocking the flow of the refrigerant along the longitudinal direction inside the header, and the plurality of tubes are disposed adjacent to each other in the same direction A supply section for supplying the refrigerant to the plurality of tubes, respectively, the first header and the second header, and an inlet section for introducing the refrigerant from the plurality of tubes, At least one flow path forming baffle dividing the flow path forming baffle into baffles;
At least one booster hole mounted in the first header or the second header to be positioned between the inlet section and the supply section and through which the refrigerant passes, A flow amplification baffle that increases the flow rate of the refrigerant to the section; And
And at least one distribution hole mounted to the first header or the second header so as to partition the supply section into an upper section and a lower section and having a refrigerant passage therethrough, wherein the refrigerant flowing from the inlet section to the supply section At least one flow distribution baffle for distributing the tubes into the tubes communicating with the upper section and the tubes communicating with the lower section; ≪ / RTI > delete

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