Heat exchanger

Abstract

A heat exchanger (1000, 2000), comprising: a plurality of heat exchange tube rows arranged in a first direction, wherein each heat exchange tube row comprises one heat exchange tube (100, 200, 300, 400, 500, 600) or a plurality of heat exchange tubes (100, 200, 300, 400, 500, 600) arranged in a second direction at an angle to the first direction, and at least part of the heat exchange tube rows extends in a third direction perpendicular to the first direction and the second direction; at least one pair of adjacent heat exchange tube rows of the at least one heat exchange tube row comprises a high-efficiency heat exchange portion (110, 210, 310, 410, 510, 610) allowing at least a majority of fluid in a pair of adjacent heat exchange tubes (100, 200, 300, 400, 500, 600) to flow therethrough, and a low-efficiency heat exchange portion (120, 220, 320, 420, 520, 620) connected between two adjacent high-efficiency heat exchange portions (110, 210, 310, 410, 510, 610) in the second direction and allowing the remainder of the fluid in the pair of adjacent heat exchange tubes (100, 200, 300, 400, 500, 600) to flow therethrough or allowing no fluid in the heat exchange tubes to flow therethrough; the high-efficiency heat exchange portion (110, 210, 310, 410, 510, 610) of the heat exchange tubes (100, 200, 300, 400, 500, 600) of one of the at least one pair of adjacent heat exchange tube rows is at least partially aligned in the first direction with the low-efficiency heat exchange portion (120, 220, 320, 420, 520, 620) of the heat exchange tubes (100, 200, 300, 400, 500, 600) of the other one of the at least one pair of adjacent heat exchange tube rows.

Description

heat exchanger Technical Field

[0001] This invention relates to the field of mechanical manufacturing, and more specifically to a heat exchanger. Background Technology

[0002] In air conditioning systems, heat exchangers are used to achieve heat exchange between different fluids. When the heat exchanger is used as an evaporator, if the evaporator temperature is lower than the air's condensation temperature, water (condensate) will form on the evaporator surface due to air condensation. If the amount of condensate is large and drainage is not timely, the condensate will accumulate on the evaporator fins. This causes the circulating air blowing through the heat exchanger to blow the condensate out of the heat exchanger. When the condensate is blown onto nearby sheet metal equipment, it can cause rust and reduce the equipment's lifespan. Alternatively, when the condensate is blown onto end users, it can negatively impact the user experience. Therefore, effective control of condensate is necessary.

[0003] Existing solutions typically reduce the surface tension of condensate by increasing the fin spacing and opening angle, thereby accelerating condensate drainage. However, increasing the fin spacing reduces the turbulence intensity of the circulating air on the fin surface, negatively impacting heat exchange performance. Increasing the opening angle increases resistance to the circulating air, resulting in reduced airflow under the same fan conditions, also negatively affecting heat exchange performance. If the fan is a variable frequency drive (VFD), increasing the fan frequency to overcome the increased resistance to the circulating air leads to increased power consumption and reduced VFD efficiency. Summary of the Invention

[0004] In view of the above problems, the present invention provides a heat exchanger comprising: a plurality of heat exchange tube rows arranged along a first direction, each heat exchange tube row including one heat exchange tube or a plurality of heat exchange tubes arranged along a second direction at an angle to the first direction, at least a portion of the heat exchange tube rows extending along a third direction perpendicular to the first and second directions; at least one pair of adjacent heat exchange tube rows in at least one heat exchange tube row including: a high-efficiency heat exchange section configured to allow at least a majority of fluid in the pair of adjacent heat exchange tubes to flow through it; and an inefficient heat exchange section configured to be connected between two adjacent high-efficiency heat exchange sections along the second direction and allowing the remaining portion of the fluid in the pair of adjacent heat exchange tubes to flow through it or not allowing the fluid in the heat exchange tubes to flow through it, wherein the high-efficiency heat exchange section of the heat exchange tubes in one of the at least one pair of adjacent heat exchange tube rows and the inefficient heat exchange section of the heat exchange tubes in the other of the at least one pair of adjacent heat exchange tube rows are at least partially aligned along the first direction.

[0005] According to one aspect of the invention, the heat exchange tubes of a plurality of heat exchange tube rows are at least partially aligned along a first direction to form a plurality of heat exchange tube columns, the plurality of heat exchange tube columns being arranged along a second direction, wherein at least a portion of the heat exchange tubes of at least one heat exchange tube column and at least a portion of the heat exchange tubes of a heat exchange tube column adjacent to the at least one heat exchange tube column are offset in the second direction.

[0006] According to one aspect of the invention, at least a portion of the heat exchange tubes in at least two of the plurality of heat exchange tube rows are aligned in a second direction.

[0007] According to one aspect of the invention, at least one pair of adjacent heat exchange tubes aligned in a second direction in the at least two heat exchange tube rows comprise two high-efficiency heat exchange sections and one low-efficiency heat exchange section.

[0008] According to one aspect of the invention, counting from one side of the heat exchanger to the other side in a second direction, at least a portion of the heat exchange tubes in the odd-numbered columns are aligned in the second direction, at least a portion of the heat exchange tubes in the even-numbered columns are aligned in the second direction, and at least a portion of the heat exchange tubes in the odd-numbered and even-numbered columns are staggered in the second direction.

[0009] According to one aspect of the invention, the heat exchanger further includes a plurality of fins connecting adjacent rows of heat exchange tubes along a first direction.

[0010] According to one aspect of the invention, the high-efficiency heat exchange section abuts against the fins.

[0011] According to one aspect of the invention, the heat exchanger further includes a plurality of fins connecting adjacent heat exchange tube rows along a first direction, and at least one of the plurality of fins thermally connecting at least one pair of adjacent heat exchange tube rows along a second direction.

[0012] According to one aspect of the invention, the heat exchanger includes at least four heat exchange tube rows, at least two heat exchange tube rows on one side of the heat exchanger along a second direction are connected by a set of fins, and at least two heat exchange tube rows on the other side of the heat exchanger along the second direction are connected by another set of fins.

[0013] According to one aspect of the invention, the heat exchanger further includes a plurality of fins connecting adjacent rows of heat exchange tubes, and the plurality of fins connecting all rows of heat exchange tubes.

[0014] According to one aspect of the invention, the high-efficiency heat exchange section is provided with a high-efficiency channel that extends at least partially along the third direction so that at least most of the fluid flows through it.

[0015] According to one aspect of the invention, the thickness of the inefficient heat exchange portion along the first direction is less than that of the efficient heat exchange portion to be spaced apart from the fins, or the thickness of the inefficient heat exchange portion along the first direction is equal to that of the efficient heat exchange portion to abut against the fins.

[0016] According to one aspect of the invention, the inefficient heat exchange section is constructed to be solid.

[0017] According to one aspect of the invention, the inefficient heat exchange section is provided with an inefficient channel extending along the third direction and having a cross-sectional area smaller than that of the efficient channel so that the remaining portion of the fluid in the heat exchange tube flows through the inefficient channel.

[0018] According to one aspect of the invention, the inefficient heat exchange section is composed of two ribs spaced apart from each other along a first direction, at least one of the two ribs abutting against a fin.

[0019] According to one aspect of the invention, the heat exchange tube includes a first heat exchange tube, the first heat exchange tube including at least two high-efficiency heat exchange sections and at least one low-efficiency heat exchange section.

[0020] According to one aspect of the invention, the width of the high-efficiency heat exchange section along the second direction is greater than or equal to the width of the low-efficiency heat exchange section along the second direction.

[0021] According to one aspect of the invention, a high-efficiency heat exchange portion and a low-efficiency heat exchange portion of the first heat exchange tube in one of the pairs of adjacent heat exchange tube rows are respectively at least partially aligned with a low-efficiency heat exchange portion and a high-efficiency heat exchange portion of the first heat exchange tube in the other of the pairs of adjacent heat exchange tube rows along a first direction.

[0022] According to one aspect of the invention, the heat exchange tube further includes a second heat exchange tube, the second heat exchange tube comprising at least three high-efficiency heat exchange sections and at least two low-efficiency heat exchange sections.

[0023] According to one aspect of the invention, one heat exchange tube row in each pair of adjacent heat exchange tube rows includes a first heat exchange tube, and the other heat exchange tube row in each pair of adjacent heat exchange tube rows includes a second heat exchange tube, wherein the widths of the high-efficiency heat exchange portion and the low-efficiency heat exchange portion of the second heat exchange tube along a second direction are the same as the width of the low-efficiency heat exchange portion of the first heat exchange tube along the second direction, such that the two high-efficiency heat exchange portions of the first heat exchange tube are at least partially aligned with the two low-efficiency heat exchange portions of the second heat exchange tube along a first direction, and the one low-efficiency heat exchange portion of the first heat exchange tube is at least partially aligned with the one high-efficiency heat exchange portion of the second heat exchange tube along the first direction.

[0024] According to one aspect of the invention, the widths of the high-efficiency heat exchange portion and the low-efficiency heat exchange portion of the first heat exchange tube are the same along the second direction, such that the two high-efficiency heat exchange portions of the first heat exchange tube are completely aligned with the two low-efficiency heat exchange portions of the second heat exchange tube along the first direction.

[0025] According to one aspect of the invention, the heat exchanger further includes at least two manifolds that are fluidly connected to both ends of heat exchange tubes in the plurality of heat exchange tube rows that are at least partially aligned along the first direction to form a heat exchange tube array.

[0026] According to one aspect of the invention, each heat exchanger tube array has its own manifold at both ends.

[0027] According to one aspect of the invention, multiple heat exchange tube rows are fluidly connected in series by fluidly communicating the respective manifolds.

[0028] According to one aspect of the invention, at least two heat exchanger tube rows are connected at one end to the same manifold.

[0029] According to one aspect of the invention, the plurality of heat exchange tube rows are at least partially aligned along the first direction to form four heat exchange tube columns, the manifold comprising a first inflow manifold, a second inflow manifold, a third inflow manifold, and a fourth inflow manifold respectively fluidly connected to one end of the four heat exchange tube columns, and a first outflow manifold, a second outflow manifold, a third outflow manifold, and a fourth outflow manifold respectively fluidly connected to the other end of the four heat exchange tube columns.

[0030] According to one aspect of the invention, a first inflow manifold, a second outflow manifold, a third inflow manifold, and a fourth outflow manifold are respectively located at one end of the four heat exchange tube arrays, and the second outflow manifold is fluidly connected to the third inflow manifold; and the first outflow manifold, the second inflow manifold, the third outflow manifold, and the fourth inflow manifold are respectively located at the other end of the four heat exchange tube arrays, and the first outflow manifold is fluidly connected to the second inflow manifold, and the third outflow manifold is fluidly connected to the fourth inflow manifold.

[0031] According to one aspect of the invention, a first inflow manifold, a second outflow manifold, a third inflow manifold, and a fourth outflow manifold are arranged sequentially from one side of the heat exchanger to the other along the second direction; and the first outflow manifold, the second inflow manifold, the third outflow manifold, and the fourth inflow manifold are arranged sequentially from one side of the heat exchanger to the other along the second direction.

[0032] According to one aspect of the invention, a first inflow manifold, a third inflow manifold, a second outflow manifold, and a fourth outflow manifold are arranged sequentially from one side of the heat exchanger to the other along the second direction; and a first outflow manifold, a third outflow manifold, a second inflow manifold, and a fourth inflow manifold are arranged sequentially from one side of the heat exchanger to the other along the second direction.

[0033] According to one aspect of the invention, the length of the high-efficiency heat exchange section along the third direction is greater than that of the low-efficiency heat exchange section, such that both ends of the high-efficiency heat exchange section protrude beyond the low-efficiency heat exchange section along the third direction, in such a way that each high-efficiency heat exchange section of the heat exchange tube is fluidly connected to a manifold located at its respective two ends, and the low-efficiency heat exchange section of the heat exchange tube is fluidly disconnected from the manifold.

[0034] According to one aspect of the invention, at least one of the plurality of fins includes a fin body and a plurality of heat exchange tube grooves formed in the fin body, wherein at least a portion of the heat exchange tubes in the plurality of heat exchange tube rows are inserted into the plurality of heat exchange tube grooves.

[0035] According to one aspect of the invention, at least one of the plurality of fins is configured to be corrugated and arranged between at least a pair of adjacent heat exchange tube rows.

[0036] According to one aspect of the invention, the first direction and the second direction are perpendicular.

[0037] According to one aspect of the invention, the heat exchange tubes of the plurality of heat exchange tube rows are at least partially aligned along the first direction to form a plurality of heat exchange tube columns, the plurality of heat exchange tube columns being in fluid communication with each other.

[0038] According to one aspect of the invention, the plurality of heat exchanger tubes are fluidly connected in series.

[0039] According to one aspect of the invention, the heat exchanger is configured such that fluid passes sequentially through a series of heat exchange tubes arranged along a second direction from one side of the heat exchanger toward the other side.

[0040] According to one aspect of the invention, the inlet of the heat exchanger is close to or located on one side of the heat exchanger in the second direction, and the outlet of the heat exchanger is close to or located on the other side of the heat exchanger in the second direction. The heat exchanger is configured such that after passing through at least one heat exchange tube set, the fluid enters a heat exchange tube set that is closer to the other side of the heat exchanger in the second direction than the at least one heat exchange tube set. Attached Figure Description

[0041] The above-described features, other objects, and advantages of the present invention will become clearer from the following description of embodiments of the invention with reference to the accompanying drawings, in which:

[0042] Figure 1 shows a perspective view of a heat exchanger with corrugated fins according to an embodiment of the present invention;

[0043] Figure 2 shows a perspective view of a heat exchanger with corrugated fins according to another embodiment of the present invention, which differs from the embodiment in Figure 1 only in the arrangement order of the manifolds at both ends of the heat exchanger.

[0044] Figure 3 shows a side view of the heat exchanger in Figure 1;

[0045] Figure 4 shows a cross-sectional view taken along line AA in Figure 3, showing a cross-section of a heat exchanger with heat exchange tubes installed according to the first embodiment of the present invention;

[0046] Figure 5 shows a cross-sectional view taken along line AA in Figure 3, showing a cross-section of a heat exchanger equipped with heat exchange tubes according to the first and second embodiments of the present invention;

[0047] Figure 6 shows a cross-sectional view taken along line AA in Figure 3, showing a cross-section of a heat exchanger equipped with heat exchange tubes according to the third and second embodiments of the present invention.

[0048] Figure 7 shows a cross-sectional view taken along line AA in Figure 3, showing a cross-section of a heat exchanger equipped with heat exchange tubes according to the fourth embodiment of the present invention;

[0049] Figure 8 shows a cross-sectional view taken along line AA in Figure 3, showing a cross-section of a heat exchanger equipped with heat exchange tubes according to the fifth embodiment of the present invention;

[0050] Figure 9 shows a cross-sectional view taken along line AA in Figure 3, showing a cross-section of a heat exchanger equipped with heat exchange tubes according to the sixth embodiment of the present invention;

[0051] Figure 10 shows a perspective view of a heat exchange tube according to a sixth embodiment of the present invention;

[0052] Figure 11 shows a perspective view of a portion of a heat exchanger equipped with plate-shaped fins according to another embodiment of the present invention; and

[0053] Figure 12 shows a cross-sectional view taken along line BB in Figure 11. Detailed Implementation

[0054] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the invention. In the following detailed description, numerous specific details are set forth to provide a thorough understanding of the embodiments of the invention for ease of explanation. However, it will be apparent that one or more embodiments may be practiced without these specific details. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0055] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The terms “comprising,” “including,” etc., as used herein indicate the presence of the stated features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.

[0056] All terms used herein (including technical and scientific terms) have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein are to be interpreted in a manner consistent with the context of this specification, and not in an idealized or overly rigid way.

[0057] When using expressions such as "at least one of A, B, and C", they should generally be interpreted in accordance with the meaning that is commonly understood by a person skilled in the art (e.g., "a system having at least one of A, B, and C" should include, but is not limited to, a system having A alone, a system having B alone, a system having C alone, a system having A and B, a system having A and C, a system having B and C, and / or a system having A, B, and C, etc.).

[0058] Referring to Figures 1 to 12, the present invention discloses a heat exchanger 1000, 2000, comprising: a plurality of heat exchange tube rows arranged along a first direction D1 (i.e., vertical direction); at least two manifolds 1100, 1200, 1300, 1400, 1500, 1600 respectively fluidly connected to both ends of heat exchange tubes 100, 200, 300, 400, 500, 600 in the plurality of heat exchange tube rows that are at least partially aligned along the first direction D1 to form a heat exchange tube array; and a plurality of fins 700, 800 connecting adjacent heat exchange tube rows along the first direction D1.

[0059] Each heat exchange tube row includes one heat exchange tube 100, 200, 300, 400, 500, 600, or multiple heat exchange tubes 100, 200, 300, 400, 500, 600 arranged along a second direction D2 at an angle to the first direction D1. For clarity, in Figures 1 to 12, the angle between the second direction D2 and the first direction D1 is set to 90°, such that the first direction D1 and the second direction D2 are perpendicular. However, the invention is not limited to this, and the angle between the second direction D2 and the first direction D1 can be between 0° and 180°. For clarity, referring to Figures 4 to 9, 11, and 12, only the case where each heat exchanger tube row includes one heat exchanger tube 100, 200, 300, 400, 500, or 600 is shown. However, the invention is not limited to this; each heat exchanger tube row may include multiple heat exchanger tubes 100, 200, 300, 400, 500, or 600 of the same or different types. The heat exchanger tubes 100, 200, 300, 400, 500, or 600 of the multiple heat exchanger tube rows are at least partially aligned along the first direction D1 to form multiple heat exchanger tube rows that are in fluid communication with each other, or even fluidly connected in series, as described in further detail below.

[0060] At least a portion of the heat exchange tube row extends along a third direction D3 (i.e., the longitudinal direction) perpendicular to the first direction D1 and the second direction D2. At least one pair of adjacent heat exchange tube rows in at least one heat exchange tube row includes high-efficiency heat exchange sections 110, 210, 310, 410, 510, 610 and low-efficiency heat exchange sections 120, 220, 320, 420, 520, 620. The high-efficiency heat exchange sections 110, 210, 310, 410, 510, 610 abut against fins 700, 800. The high-efficiency heat exchange sections 110, 210, 310, 410, 510, 610 are configured such that at least a majority of the fluid (also referred to as refrigerant) in the pair of adjacent heat exchange tubes 100, 200, 300, 400, 500, 600 flows through them. Therefore, the high-efficiency heat exchange sections 110, 210, 310, 410, 510, and 610 can exchange heat sufficiently. Consequently, the fins 700 and 800 that come into contact with the high-efficiency heat exchange sections 110, 210, 310, 410, 510, and 610 will also exchange heat sufficiently, resulting in a significant reduction in the surface temperature of the fins 700 and 800. This causes moisture in the airflow blown into the heat exchangers 1000 and 2000 to condense upon contact with the high-efficiency heat exchange sections 110, 210, 310, 410, 510, and 610 and the fins 700 and 800. This achieves the effect of discharging more condensate from the surfaces of the high-efficiency heat exchange sections 110, 210, 310, 410, 510, and 610 and the surfaces of the fins 700 and 800 that come into contact with them.

[0061] The inefficient heat exchange sections 120, 220, 320, 420, 520, and 620 are configured to connect along the second direction D2 between two adjacent high-efficiency heat exchange sections 110, 210, 310, 410, 510, and 610, allowing the remaining portion of the fluid in the pair of adjacent heat exchange tubes 100, 200, 300, 400, 500, and 600 to flow through them (for example, referring to Figure 7, the inefficient heat exchange section 420 is provided to extend along the third direction D3 and transversely). An inefficient channel 421 with a cross-sectional area smaller than the efficient channel 411 allows the remaining portion of the fluid in the heat exchange tube 400 to flow through it, or prevents the fluid in the heat exchange tubes 100, 200, 300, 400, 500, and 600 from flowing through it (for example, referring to Figures 4 to 6, 8, and 12, the inefficient heat exchange sections 120, 220, 320, and 520 are constructed as solid, so that no fluid flows through them). Therefore, the inefficient heat exchange sections 120, 220, 320, 420, 520, and 620 cannot perform sufficient heat exchange, resulting in less condensate draining from the surfaces of the inefficient heat exchange sections 120, 220, 320, 420, 520, and 620 and the surfaces of the fins 700 (see Figures 7 and 8) that abut them.

[0062] In this way, by setting the distribution of high-efficiency heat exchange sections 110, 210, 310, 410, 510, 610 and low-efficiency heat exchange sections 120, 220, 320, 420, 520, 620, the amount and distribution of discharged condensate can be controlled.

[0063] The high-efficiency heat exchange sections 110, 210, 310, 410, 510, and 610 of the heat exchange tubes 100, 200, 300, 400, 500, and 600 of one of the at least one pair of adjacent heat exchange tube rows, and the inefficient heat exchange sections 120, 220, 320, 420, 520, and 620 of the heat exchange tubes 100, 200, 300, 400, 500, and 600 of the other heat exchange tube row, are at least partially aligned along the first direction D1, such that the high-efficiency heat exchange sections 110, 210, 310, 410, 510, and 610 are ... The alternating distribution of inefficient heat exchange sections 120, 220, 320, 420, 520, and 620 along the first direction D1 not only avoids excessive condensate discharge from heat exchangers 1000 and 2000, preventing the resulting excessive condensate from being blown out of heat exchangers 1000 and 2000, and preventing rusting of sheet metal equipment due to excessive condensate, but also avoids excessive reduction in the local heat exchange capacity of heat exchangers 1000 and 2000 due to the alignment of inefficient heat exchange sections 120, 220, 320, 420, 520, and 620 along the first direction D1. Therefore, heat exchangers 1000 and 2000 according to the embodiments of the present invention can effectively extend the service life of sheet metal equipment and improve the user experience.

[0064] Referring to Figures 4 to 9, 11, and 12, the heat exchange tubes 100, 200, 300, 400, 500, and 600 of the multiple heat exchange tube rows are at least partially aligned along the first direction D1 to form multiple heat exchange tube columns, which are arranged along the second direction D2 (see Figures 1 to 2). At least a portion of the heat exchange tubes 100, 200, 300, 400, 500, and 600 of at least one heat exchange tube column and at least a portion of the heat exchange tubes 100, 200, 300, 400, 500, and 600 of the heat exchange tube column adjacent to the at least one heat exchange tube column are staggered in the second direction D2 (not shown in Figures 1 to 2).

[0065] For clarity, referring to Figures 1 and 2, only four heat exchanger tube rows are shown, each connected between a pair of manifolds 1100, 1200; 1300, 1400; 1500, 1600; 1700, 1800 located at both ends of heat exchanger 1000, 2000 along a third direction D3. There are a total of four pairs of manifolds 1100, 1200; 1300, 1400; 1500, 1600; 1700, 1800, resulting in four heat exchanger tube rows. Each heat exchanger tube row has its own manifold 1100, 1200; 1300, 1400; 1500, 1600; 1700, 1800 at both ends. However, the invention is not limited to this; it can also be configured such that at least two heat exchanger tube rows have one end connected to the same manifold. Multiple heat exchanger tube rows are fluidly connected in series by fluidly connecting the corresponding manifolds 1100, 1200; 1300, 1400; 1500, 1600; 1700, 1800, as described in further detail below.

[0066] Referring to Figures 1 and 2, the plurality of heat exchange tube rows are at least partially aligned along the first direction D1 to form four heat exchange tube columns. The manifold includes a first inflow manifold 1100, a second inflow manifold 1300, a third inflow manifold 1500, and a fourth inflow manifold 1700, which are respectively fluidly connected to one end of the four heat exchange tube columns, and a first outflow manifold 1200, a second outflow manifold 1400, a third outflow manifold 1600, and a fourth outflow manifold 1800, which are respectively fluidly connected to the other end of the four heat exchange tube columns.

[0067] Referring to Figures 1 and 2, the first inflow manifold 1100, the second outflow manifold 1400, the third inflow manifold 1500, and the fourth outflow manifold 1800 are located at one end of the four heat exchange tube sets, with the second outflow manifold 1400 fluidly connected to the third inflow manifold 1500. The first outflow manifold 1200, the second inflow manifold 1300, the third outflow manifold 1600, and the fourth inflow manifold 1700 are located at the other end of the four heat exchange tube sets, with the first outflow manifold 1200 fluidly connected to the second inflow manifold 1300 and the third outflow manifold 1600 fluidly connected to the fourth inflow manifold 1700.

[0068] Referring to Figure 1, along the third direction D3, the first inflow manifold 1100, the second outflow manifold 1400, the third inflow manifold 1500, and the fourth outflow manifold 1800 located at one end of the heat exchanger 1000 are arranged sequentially from one side of the heat exchanger 1000 to the other side along the second direction D2. Along the third direction D3, the first outflow manifold 1200, the second inflow manifold 1300, the third outflow manifold 1600, and the fourth inflow manifold 1700 located at the other end of the heat exchanger 1000 are arranged sequentially from one side of the heat exchanger 1000 to the other side along the second direction D2. In heat exchanger 1000, fluid flows into heat exchanger 1000 from first inlet manifold 1100, flows through first heat exchange tubes along third direction D3 to first outlet manifold 1200, then flows into second inlet manifold 1300 and through second heat exchange tubes along third direction D3 to second outlet manifold 1400, then flows into third inlet manifold 1500 and through third heat exchange tubes along third direction D3 to third outlet manifold 1600, then flows into fourth inlet manifold 1700 and through fourth heat exchange tubes along third direction D3 to fourth outlet manifold 1800.

[0069] Referring to Figure 2, heat exchanger 2000 is a heat exchanger according to another embodiment of the present invention. The difference between heat exchanger 2000 and heat exchanger 1000 lies only in the arrangement order of the manifolds located at both ends of heat exchanger 2000 along the third direction D3. The first inflow manifold 1100, the third inflow manifold 1500, the second outflow manifold 1400, and the fourth outflow manifold 1800 located at one end of heat exchanger 2000 along the third direction D3 are arranged sequentially from one side of heat exchanger 2000 to the other side along the second direction D2. The first outflow manifold 1200, the third outflow manifold 1600, the second inflow manifold 1300, and the fourth inflow manifold 1700 located at the other end of heat exchanger 2000 along the third direction D3 are arranged sequentially from one side of heat exchanger 2000 to the other side along the second direction D2. In heat exchanger 2000, fluid flows into heat exchanger 1000 from the first inlet manifold 1100, flows through the first heat exchange tube set along the third direction D3 to the first outlet manifold 1200, then flows into the second inlet manifold 1300 and through the second heat exchange tube set along the third direction D3 to the second outlet manifold 1400, then flows into the third inlet manifold 1500 and through the third heat exchange tube set along the third direction D3 to the third outlet manifold 1600, then flows into the fourth inlet manifold 1700 and through the fourth heat exchange tube set along the third direction D3 to the fourth outlet manifold 1800.

[0070] Therefore, the heat exchangers 1000 and 2000 are configured to allow fluid to pass sequentially through rows of heat exchange tubes arranged along the second direction D2 from one side of the heat exchangers 1000 and 2000 to the other side using manifolds 1100, 1200; 1300, 1400; 1500, 1600; 1700, 1800. The inlet of the heat exchangers 1000 and 2000 (i.e., the inlet of the first inflow manifold 1100) is close to or located on one side of the heat exchangers 1000 and 2000 in the second direction D2, and the outlet of the heat exchangers 1000 and 2000 (i.e., the outlet of the fourth outflow manifold 1800) is close to or located on the other side of the heat exchangers 1000 and 2000 in the second direction D2. The heat exchanger 1000 is configured such that after passing through at least one heat exchange tube bank, the fluid enters a heat exchange tube bank that is closer to the other side of the heat exchanger 1000 in the second direction D2 than the at least one heat exchange tube bank.

[0071] Although Figures 1 and 2 show heat exchangers 1000 and 2000 comprising four heat exchange tube rows, the present invention is not limited thereto, and heat exchangers 1000 and 2000 may include more than four heat exchange tube rows. At least two heat exchange tube rows on the side of heat exchangers 1000 and 2000 along the second direction D2 near the heat exchangers 1000 and 2000 are connected by a set of fins 700, and at least two heat exchange tube rows on the other side of heat exchangers 1000 and 2000 along the second direction D2 near the heat exchangers 1000 and 2000 are connected by another set of fins 700. Although Figures 1 and 2 show fins 700, the present invention is not limited thereto, and fins 700 may be replaced by fins 800.

[0072] Referring to Figure 1, a protective plate 1900 is provided on the top of the heat exchanger 1000, which is connected between the manifolds 1100 and 1200 and between the manifolds 1500 and 1600. The protective plate 1900 is used to assist in positioning the fins 700.

[0073] Similarly, referring to Figure 2, a protective plate 1900 is provided on the top of the heat exchanger 2000, which is connected between the manifolds 1100 and 1200 and between the manifolds 1300 and 1400. The protective plate 1900 is used to assist in positioning the fins 700.

[0074] At least a portion of the heat exchange tubes 100, 200, 300, 400, 500, and 600 in at least two of the plurality of heat exchange tube rows are aligned in the second direction D2. Referring to Figures 4 to 9, 11, and 12, at least one pair of adjacent heat exchange tubes 100, 200, 300, 400, 500, and 600 aligned in the second direction D2 in the at least two heat exchange tube rows include two high-efficiency heat exchange sections 110, 210, 310, 410, 510, and 610 and one low-efficiency heat exchange section 120, 220, 320, 420, 520, and 620.

[0075] Counting from one side of heat exchangers 1000 and 2000 to the other side in the second direction D2, at least some heat exchange tubes 100, 200, 300, 400, 500, and 600 in the odd-numbered columns are aligned in the second direction D2, and at least some heat exchange tubes 100, 200, 300, 400, 500, and 600 in the even-numbered columns are aligned in the second direction D2. Furthermore, at least some heat exchange tubes 100, 200, 300, 400, 500, and 600 in the odd-numbered and even-numbered columns are staggered in the second direction D2 to further adjust the amount and distribution of discharged condensate along the second direction D2.

[0076] In one embodiment of the present invention, referring to Figures 4 to 9, 11, and 12, the fins 700 and 800 connect adjacent heat exchange tube rows along a first direction D1, and at least one of the fins 700 and 800 thermally connects or thermally couples at least one pair of adjacent heat exchange tube rows along a second direction D2.

[0077] In another embodiment of the present invention, referring to Figures 4 to 9, 11, and 12, the fins 700 and 800 connect adjacent heat exchange tube rows along a first direction D1, and the fins 700 and 800 connect or thermally couple all heat exchange tube rows along a second direction D2.

[0078] Referring to Figures 4 to 9, 11, and 12, the high-efficiency heat exchange units 110, 210, 310, 410, 510, and 610 are provided with high-efficiency channels 111, 211, 311, 411, 511, and 611 that extend at least partially along the third direction D3 so that at least a majority of the fluid flows through them.

[0079] Referring to Figures 4 to 6 and 12, the thickness of the inefficient heat exchange sections 120, 220, and 320 along the first direction D1 is smaller than that of the efficient heat exchange sections 110, 210, and 310, thus separating them from the fins 700 and 800. This prevents the inefficient heat exchange sections 120, 220, and 320 from exchanging heat through the fins 700 and 800, thereby reducing the amount of condensate discharged from the surface of the inefficient heat exchange sections 120, 220, and 320 and adjusting the distribution of condensate. Referring to Figures 7 to 9, the thickness of the inefficient heat exchange sections 420, 520, and 620 along the first direction D1 is equal to that of the efficient heat exchange sections 410, 510, and 610, so that they abut against the fins 700. This allows the inefficient heat exchange sections 420, 520, and 620 to exchange heat through the fins 700, thereby increasing the amount of condensate discharged from the surface of the inefficient heat exchange sections 420, 520, and 620 and thus regulating the distribution of condensate.

[0080] Referring to Figure 9, the inefficient heat exchange section 620 is composed of two ribs 621 and 622 spaced apart from each other along the first direction D1. At least one of the two ribs 621 and 622 abuts against the fin 700. Compared with the embodiment of Figure 8, the inefficient heat exchange section 620 saves material and reduces the cost of the inefficient heat exchange section 620.

[0081] Referring to Figures 4 to 12, the heat exchange tube includes first heat exchange tubes 100, 300, 400, 500, and 600. Each first heat exchange tube 100, 300, 400, 500, and 600 includes at least two high-efficiency heat exchange sections 110, 310, 410, 510, and 610 and at least one low-efficiency heat exchange section 120, 320, 420, 520, and 620.

[0082] Referring to Figure 6, the width of the high-efficiency heat exchange section 310 along the second direction D2 is greater than the width of the low-efficiency heat exchange section 320 along the second direction D2. Referring to Figures 4 to 9, the width of the high-efficiency heat exchange sections 110, 210, 410, 510, and 610 along the second direction D2 is equal to the width of the low-efficiency heat exchange sections 120, 220, 420, 520, and 620 along the second direction D2.

[0083] Referring to Figures 4 to 9, 11, and 12, in each pair of adjacent heat exchanger tube rows, one of the high-efficiency heat exchange sections 110, 310, 410, 510, and one of the low-efficiency heat exchange sections 120, 320, 420, 520, and 620 of the first heat exchanger tubes 100, 300, 400, 500, and 600 of the first heat exchanger tubes 100, 300, 400, 500, and 600 of the other pair of adjacent heat exchanger tube rows is at least partially aligned along the first direction D1 with one of the low-efficiency heat exchange sections 120, 320, 420, 520, and 620 and one of the high-efficiency heat exchange sections 110, 310, 410, 510, and 610 of the first heat exchanger tubes 100, 300, 400, 500, and 600 of the other pair of adjacent heat exchanger tube rows.

[0084] Referring to Figures 5 and 6, the heat exchange tube also includes a second heat exchange tube 200, which includes at least three high-efficiency heat exchange sections 210 and at least two low-efficiency heat exchange sections 220.

[0085] Referring to Figures 5 and 6, one of the adjacent heat exchanger tube rows in each pair includes a first heat exchanger tube 100, 300. The other heat exchanger tube row in each pair includes a second heat exchanger tube 200. The widths of the high-efficiency heat exchanger section 210 and the low-efficiency heat exchanger section 220 of the second heat exchanger tube 200 along the second direction D2 are the same as the widths of the low-efficiency heat exchanger sections 120, 320 of the first heat exchanger tubes 100, 300 along the second direction D2, such that the two high-efficiency heat exchanger sections 110, 310 of the first heat exchanger tubes 100, 300 are at least partially aligned with the two low-efficiency heat exchanger sections 220 of the second heat exchanger tube 200 along the first direction D1, and the low-efficiency heat exchanger sections 120, 320 of the first heat exchanger tubes 100, 300 are at least partially aligned with the one high-efficiency heat exchanger section 210 of the second heat exchanger tube 200 along the first direction D1.

[0086] Referring to Figure 5, the widths of the high-efficiency heat exchange section 110 and the low-efficiency heat exchange section 120 of the first heat exchange tube 100 along the second direction D2 are the same, such that the two high-efficiency heat exchange sections 110 of the first heat exchange tube 100 are completely aligned with the two low-efficiency heat exchange sections 220 of the second heat exchange tube 200 along the first direction D1.

[0087] Referring to Figures 10 and 11, in the heat exchange tube 600 according to an embodiment of the present invention, the length of the high-efficiency heat exchange section 610 along the third direction D3 is greater than that of the low-efficiency heat exchange section 620, such that both ends of the high-efficiency heat exchange section 610 protrude beyond the low-efficiency heat exchange section 620 along the third direction D3, in such a way that each high-efficiency heat exchange section 610 of the heat exchange tube 600 is fluidly connected to the manifolds located at their respective ends, and the low-efficiency heat exchange section 620 of the heat exchange tube 600 is fluidly disconnected from the manifolds.

[0088] Referring to Figures 1 to 9, the plurality of fins 700 are corrugated and arranged between at least one pair of adjacent heat exchange tube rows. The heat exchanger according to an embodiment of the present invention has high heat transfer efficiency and high manufacturing efficiency. Referring to Figures 11 to 12, the plurality of fins 800 includes a fin body and a plurality of heat exchange tube grooves 810 formed in the fin body. At least a portion of the heat exchange tubes 100 in the plurality of heat exchange tube rows are inserted into the plurality of heat exchange tube grooves 810. The length of the high-efficiency heat exchange portion 110 of the heat exchange tube 100 along the third direction D3 is greater than that of the inefficient heat exchange portion 120, such that both ends of the high-efficiency heat exchange portion 110 protrude beyond the inefficient heat exchange portion 120 along the third direction D3. Although Figures 11 to 12 only show the heat exchange tube 100 inserted into the heat exchange tube groove 810, the present invention is not limited thereto; heat exchange tubes 200, 300, 400, 500, and 600 may also be inserted into the heat exchange tube groove 810. The heat exchanger according to embodiments of the present invention has good condensate drainage effect and greater design flexibility.

[0089] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. It should be noted that implementations not illustrated or described in the drawings or the main text of the specification are forms known to those skilled in the art and are not described in detail. Furthermore, the definitions of the components described above are not limited to the various specific structures, shapes, or methods mentioned in the embodiments, and those skilled in the art can easily modify or substitute them.

[0090] It should also be noted that, in specific embodiments of the present invention, unless otherwise stated otherwise, the numerical parameters in this specification and the appended claims are approximate values ​​and can be changed according to the desired characteristics obtained from the content of the present invention. Specifically, all numbers used in the specification and claims to indicate dimensions, range conditions, etc., of the composition should be understood to be modified by the term "about" in all cases. Generally, this means that there may be variations of ±10% in some embodiments, ±5% in some embodiments, ±1% in some embodiments, and ±0.5% in some embodiments.

[0091] Those skilled in the art will understand that the features described in the various embodiments and / or claims of the present invention can be combined or combined in various ways, even if such combinations or combinations are not explicitly described in the present invention. In particular, the features described in the various embodiments and / or claims of the present invention can be combined or combined in various ways without departing from the spirit and teachings of the present invention. All such combinations and / or combinations fall within the scope of the present invention.

[0092] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A heat exchanger, characterized by, The heat exchanger comprises: a plurality of rows of heat exchange tubes arranged along a first direction, each row of heat exchange tubes comprising one heat exchange tube or a plurality of heat exchange tubes arranged along a second direction at an angle to the first direction, at least a portion of the rows of heat exchange tubes extending along a third direction perpendicular to the first and second directions; at least one pair of adjacent rows of heat exchange tubes in the at least one row of heat exchange tubes comprises: a high-efficiency heat exchange portion configured to cause at least a majority of a fluid in the pair of adjacent rows of heat exchange tubes to flow therethrough; and a low-efficiency heat exchange portion configured to connect between two adjacent high-efficiency heat exchange portions along the second direction and cause a remainder of the fluid in the pair of adjacent rows of heat exchange tubes to flow therethrough or not to flow therethrough, wherein the high-efficiency heat exchange portion of a heat exchange tube of one row of the at least one pair of adjacent rows of heat exchange tubes and the low-efficiency heat exchange portion of a heat exchange tube of another row of the at least one pair of adjacent rows of heat exchange tubes are at least partially aligned along the first direction.

2. The heat exchanger of claim 1, wherein The heat exchange tubes of the plurality of rows of heat exchange tubes are at least partially aligned into a plurality of columns of heat exchange tubes along the first direction, the plurality of columns of heat exchange tubes arranged along the second direction, at least a portion of heat exchange tubes of at least one column of heat exchange tubes and at least a portion of heat exchange tubes of a column of heat exchange tubes adjacent to the at least one column of heat exchange tubes being staggered in the second direction.

3. The heat exchanger of claim 2, wherein At least a portion of heat exchange tubes of at least two columns of heat exchange tubes of the plurality of columns of heat exchange tubes are aligned in the second direction.

4. The heat exchanger of claim 3, wherein At least one pair of adjacent heat exchange tubes of the at least two columns of heat exchange tubes aligned in the second direction comprises two high-efficiency heat exchange portions and one low-efficiency heat exchange portion.

5. The heat exchanger of claim 1, wherein At least a portion of heat exchange tubes of odd-numbered columns of heat exchange tubes are aligned in the second direction, at least a portion of heat exchange tubes of even-numbered columns of heat exchange tubes are aligned in the second direction, and at least a portion of heat exchange tubes of odd-numbered and even-numbered columns of heat exchange tubes are staggered in the second direction, counted from one side of the heat exchanger to the other side of the heat exchanger in the second direction.

6. The heat exchanger of claim 1, wherein The heat exchanger further comprises a plurality of fins connecting adjacent rows of heat exchange tubes along the first direction.

7. The heat exchanger of claim 6, wherein The high-efficiency heat exchange portion is abutted against the fins.

8. The heat exchanger of claim 2, wherein The heat exchanger further comprises a plurality of fins connecting adjacent rows of heat exchange tubes along a first direction, and at least one fin of the plurality of fins thermally connects at least one pair of adjacent columns of heat exchange tubes along a second direction.

9. The heat exchanger of claim 8, wherein, The heat exchanger comprises at least four columns of heat exchange tubes, at least two columns of heat exchange tubes proximate to one side of the heat exchanger along the second direction connected by one set of fins, and at least two columns of heat exchange tubes proximate to the other side of the heat exchanger along the second direction connected by another set of fins.

10. The heat exchanger of claim 2, wherein The heat exchanger further comprises a plurality of fins connecting adjacent rows of heat exchange tubes, and the plurality of fins connect all columns of heat exchange tubes.

11. The heat exchanger of claim 1, wherein The high-efficiency heat exchange portion is provided with a high-efficiency channel extending at least partially along the third direction to cause the at least majority of the fluid to flow therethrough.

12. The heat exchanger of claim 6, wherein A thickness of the low-efficiency heat exchange portion along the first direction is less than the high-efficiency heat exchange portion to be spaced apart from the fins, or A thickness of the low-efficiency heat exchange portion along the first direction is equal to the high-efficiency heat exchange portion to be abutted against the fins.

13. The heat exchanger of claim 1, wherein The low-efficiency heat exchange portion is configured to be solid.

14. The heat exchanger of claim 1, wherein The inefficient heat exchange section is provided with a cross-sectional area smaller than that of the efficient channel extending along the third direction, so that the remaining portion of the fluid in the heat exchange tube flows through the inefficient channel.

15. The heat exchanger of claim 6, wherein The inefficient heat exchange section is composed of two ribs spaced apart from each other along a first direction, at least one of the two ribs abutting against the fins.

16. The heat exchanger according to any one of claims 1 to 15, characterized in that The heat exchange tube includes a first heat exchange tube, which includes at least two high-efficiency heat exchange sections and at least one low-efficiency heat exchange section.

17. The heat exchanger of claim 1, wherein The width of the high-efficiency heat exchange section along the second direction is greater than or equal to the width of the low-efficiency heat exchange section along the second direction.

18. The heat exchanger of claim 16, wherein, A high-efficiency heat exchange section and a low-efficiency heat exchange section of the first heat exchange tube in one of the pairs of adjacent heat exchange tube rows are respectively at least partially aligned with a low-efficiency heat exchange section and a high-efficiency heat exchange section of the first heat exchange tube in the other pair of adjacent heat exchange tube rows along a first direction.

19. The heat exchanger of claim 16, wherein The heat exchange tube also includes a second heat exchange tube, which includes at least three high-efficiency heat exchange sections and at least two low-efficiency heat exchange sections.

20. The heat exchanger of claim 19, wherein, One of the adjacent heat exchanger tube rows in each pair includes a first heat exchanger tube, and the other heat exchanger tube row in each pair includes a second heat exchanger tube. The high-efficiency heat exchange section and the low-efficiency heat exchange section of the second heat exchanger tube have the same width along the second direction as each other and the same width along the second direction as the low-efficiency heat exchange section of the first heat exchanger tube. This is such that the two high-efficiency heat exchange sections of the first heat exchanger tube are at least partially aligned with the two low-efficiency heat exchange sections of the second heat exchanger tube along the first direction, and the one low-efficiency heat exchange section of the first heat exchanger tube is at least partially aligned with the one high-efficiency heat exchange section of the second heat exchanger tube along the first direction.

21. The heat exchanger according to claim 20, characterized in that, The high-efficiency heat exchange section and the low-efficiency heat exchange section of the first heat exchange tube have the same width along the second direction, such that the two high-efficiency heat exchange sections of the first heat exchange tube are completely aligned with the two low-efficiency heat exchange sections of the second heat exchange tube along the first direction.

22. The heat exchanger of any one of claims 1-15 and 17-21, wherein, The heat exchanger further includes at least two manifolds that are fluidly connected to both ends of heat exchange tubes that are at least partially aligned along the first direction to form a heat exchange tube array in the plurality of heat exchange tube rows.

23. The heat exchanger of claim 22, wherein, Each heat exchanger tube bank has its own manifold at both ends.

24. The heat exchanger of claim 23, wherein, Multiple heat exchange tube rows are fluidly connected in series by connecting the corresponding manifolds.

25. The heat exchanger of claim 22, wherein At least two heat exchanger tube rows are connected at one end to the same manifold.

26. The heat exchanger of claim 22, wherein The plurality of heat exchange tube rows are at least partially aligned along the first direction to form four heat exchange tube columns. The manifold includes a first inflow manifold, a second inflow manifold, a third inflow manifold, and a fourth inflow manifold, which are respectively fluidly connected to one end of the four heat exchange tube columns, and a first outflow manifold, a second outflow manifold, a third outflow manifold, and a fourth outflow manifold, which are respectively fluidly connected to the other end of the four heat exchange tube columns.

27. The heat exchanger according to claim 26, characterized in that, The first inflow manifold, the second outflow manifold, the third inflow manifold, and the fourth outflow manifold are located at one end of the four heat exchange tube rows, and the second outflow manifold is fluidly connected to the third inflow manifold. as well as The first outflow manifold, the second inflow manifold, the third outflow manifold, and the fourth inflow manifold are located at the other end of the four heat exchange tube rows, respectively. The first outflow manifold is fluidly connected to the second inflow manifold, and the third outflow manifold is fluidly connected to the fourth inflow manifold.

28. The heat exchanger according to claim 27, characterized in that, The first inflow manifold, the second outflow manifold, the third inflow manifold, and the fourth outflow manifold are arranged sequentially from one side of the heat exchanger to the other along the second direction; and The first outflow manifold, the second inflow manifold, the third outflow manifold, and the fourth inflow manifold are arranged sequentially from one side of the heat exchanger to the other along the second direction.

29. The heat exchanger according to claim 27, characterized in that, The first inflow manifold, the third inflow manifold, the second outflow manifold, and the fourth outflow manifold are arranged sequentially from one side of the heat exchanger to the other along the second direction; and The first outflow manifold, the third outflow manifold, the second inflow manifold, and the fourth inflow manifold are arranged sequentially from one side of the heat exchanger to the other along the second direction.

30. The heat exchanger of claim 22, wherein, The length of the high-efficiency heat exchange section along the third direction is greater than that of the low-efficiency heat exchange section, such that both ends of the high-efficiency heat exchange section protrude beyond the low-efficiency heat exchange section along the third direction. In this way, each high-efficiency heat exchange section of the heat exchange tube is fluidly connected to the manifolds located at their respective ends, and the low-efficiency heat exchange section of the heat exchange tube is fluidly disconnected from the manifolds.

31. The heat exchanger according to any one of claims 6 to 13, characterized in that, At least one of the plurality of fins includes a fin body and a plurality of heat exchange tube grooves formed in the fin body, wherein at least a portion of the heat exchange tubes in the plurality of heat exchange tube rows are inserted into the plurality of heat exchange tube grooves.

32. The heat exchanger according to any one of claims 6 to 15, 17 to 21, characterized in that, At least one of the plurality of fins is configured to be corrugated and is arranged between at least a pair of adjacent heat exchange tube rows.

33. The heat exchanger of claim 1, wherein The first direction is perpendicular to the second direction.

34. The heat exchanger of claim 1, wherein The heat exchange tubes of the plurality of heat exchange tube rows are at least partially aligned along the first direction to form a plurality of heat exchange tube columns, which are in fluid communication with each other.

35. The heat exchanger of claim 34, wherein, The multiple heat exchanger tubes are connected in series in a fluid manner.

36. The heat exchanger of claim 34, wherein, The heat exchanger is configured such that fluid passes sequentially through individual heat exchange tube arrays arranged along a second direction from one side of the heat exchanger toward the other.

37. The heat exchanger of claim 34 or 35, wherein, The inlet of the heat exchanger is close to or located on one side of the heat exchanger in the second direction, and the outlet of the heat exchanger is close to or located on the other side of the heat exchanger in the second direction. The heat exchanger is configured such that after passing through at least one heat exchange tube set, the fluid enters a heat exchange tube set that is closer to the other side of the heat exchanger in the second direction than the at least one heat exchange tube set.

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