Heat exchanger and air conditioner

Abstract

The application relates to a heat exchanger and an air conditioner. The heat exchanger comprises flow paths, has an inlet and an outlet located above the inlet, and enables fluid to flow upwards. The flow paths are multiple and are arranged at intervals along the height direction of the heat exchanger. The flow path located at the lower side of two adjacent flow paths is defined as a first flow path, and the flow path located at the upper side is defined as a second flow path. The outlet of the second flow path is located above the outlet of the adjacent first flow path, and the outlet of the first flow path is located above the inlet of the adjacent second flow path. The design improves the height difference between the outlet and the inlet of the flow path, is beneficial to the water storage under the action of gravity and flowing out through the inlet, reduces the possibility of water storage, and avoids the situation that the heat exchange pipe of the flow path is frozen and cracked.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heat exchangers, in particular to a heat exchanger and an air conditioner. BACKGROUND

[0002] The heat exchanger can realize heat exchange of two fluid media with a certain temperature difference, so as to achieve the purpose of cooling and ensuring normal operation of the system.

[0003] In the current heat exchanger, a plurality of parallel flow paths are usually arranged, and the inlets and outlets of the flow paths are usually at the same height. When the flow path of the heat exchanger has residual medium (such as chilled water), icing will occur in a low-temperature environment, and the heat exchange pipe of the flow path will be cracked. In order to discharge the medium (such as chilled water) in the flow path in time, the medium in the flow path is usually manually discharged through the inlet and outlet, because the height of the inlet and outlet is basically the same, the water in the interior cannot be automatically discharged, thereby the heat exchange pipe forming the flow path has the risk of cracking, and the operation is complicated. CONTENT OF THE UTILITY MODEL

[0004] Therefore, it is necessary to provide a heat exchanger to reduce the risk of cracking of the pipe of the flow path.

[0005] The present application provides a heat exchanger, comprising a flow path, having an inlet and an outlet located above the inlet along the height direction of the heat exchanger, so that the fluid flows upward; the flow path has a plurality of flow paths, and is arranged along the height direction of the heat exchanger, the lower flow path of the two adjacent flow paths is defined as a first flow path, and the upper flow path along the height direction of the heat exchanger is defined as a second flow path, the outlet of the second flow path is located above the outlet of the adjacent first flow path, and the outlet of the first flow path is located above the inlet of the adjacent second flow path.

[0006] In one embodiment, the heat exchanger comprises a vertically arranged connecting plate and a heat exchange pipe group, the heat exchange pipe group has B columns, and is arranged along the width direction of the heat exchanger, each column of the heat exchange pipe group comprises A rows of heat exchange pipes arranged along the height direction of the connecting plate and having an oval cross section, the two side edges of the connecting plate along the width direction of the heat exchanger are defined as a first side edge and a second side edge, respectively, the inlet of each flow path is arranged on the heat exchange pipe close to the first side edge, and the outlet of each flow path is arranged on the heat exchange pipe close to the second side edge, the flow path is formed by the heat exchange pipes connected in sequence, and the number of the heat exchange pipes contained in each flow path is n, and n is an even number.

[0007] In one of the embodiments, the two adjacent rows of the heat exchange tube groups are defined as a first heat exchange tube group and a second heat exchange tube group, the heat exchange tubes in the first heat exchange tube group are defined as first heat exchange tubes, the heat exchange tubes in the second heat exchange tube group are defined as second heat exchange tubes, the first heat exchange tubes and the second heat exchange tubes are arranged in a staggered manner, the lowermost row of the first heat exchange tubes is located below the lowermost row of the second heat exchange tubes, the uppermost row is the second heat exchange tubes, the first column of the heat exchange tube group closest to the first side edge is the first heat exchange tube group, and the first heat exchange tube group and the second heat exchange tube group are arranged alternately along the width direction of the heat exchanger.

[0008] In one of the embodiments, the height of the connecting plate is defined as H, the length of the connecting plate is defined as L, the distance between the top edge of the uppermost row of the heat exchange tubes and the top edge of the connecting plate is defined as d1, the distance between the bottom edge of the lowermost row of the heat exchange tubes and the bottom edge of the connecting plate is defined as d2, the distance between the centers of the two adjacent heat exchange tubes in the height direction of the connecting plate is defined as d3, the distance between the side edge of the heat exchange tube closest to the first side edge and the first side edge is defined as d4, the distance between the side edge of the heat exchange tube closest to the second side edge and the second side edge is defined as d5, the distance between the centers of the two adjacent heat exchange tubes in the length direction of the connecting plate is defined as d6, A, H, d1 and d2 satisfy: A=(H-d1-d2) / d3, B=(L-d4-d5) / d6, the length of the heat exchange tube is M, the flow path has D rows, D=(A*B*M) / C, wherein C is 7-9, D is an integer, the heat exchange tubes in the flow path have E, E=A*B / D.

[0009] In one of the embodiments, the distance d1 is equal to the distance d2, and the distance d4 is equal to the distance d5.

[0010] In one of the embodiments, the heat exchange tube group closest to the first side edge is defined as the first column of the heat exchange tube group, the heat exchange tube group closest to the second side edge is defined as the Bth column of the heat exchange tube group, at least part of the inlet of each flow path is located on the corresponding heat exchange tube in the first column of the heat exchange tube group, at least part of the outlet of each flow path is located on the corresponding heat exchange tube in the Bth column of the heat exchange tube group, and each flow path includes a wave section for upward fluid flow.

[0011] In one of the embodiments, B=3, A=8, D=4, E=6, each of the flow paths comprises an inflow section upstream of the corresponding wave section, the inflow section of the lowermost flow path is formed by the lowermost row of the first heat exchange tubes, the inflow sections of the other flow paths are arranged in sequence from bottom to top, and each is formed by the lowermost row of the first heat exchange tubes in the first group of heat exchange tube banks in sequence from bottom to top, the outlet of the uppermost flow path is located on the uppermost heat exchange tube in the second group of heat exchange tube banks, and the outlets of the other flow paths except the uppermost flow path are located on the corresponding heat exchange tubes in the third group of heat exchange tube banks.

[0012] In one of the embodiments, B=6, A=6, D=3, E=12, the flow paths of the flow paths are different, the lowermost flow path has an inflow section formed by the lowermost row of the first heat exchange tubes, the inflow section is upstream of the corresponding wave section, the inlets of the flow paths are located on the corresponding heat exchange tubes in the first group of heat exchange tube banks, the inlets of the middle flow paths are arranged adjacent to the inlet of the lowermost flow path, and the inlet of the uppermost flow path is separated from the inlet of the middle flow path by one heat exchange tube, and the outlets of the flow paths are located on the corresponding heat exchange tubes in the sixth group of heat exchange tube banks.

[0013] In one of the embodiments, B=6, A=8, D=3, E=16, the flow paths of the flow paths are different, the lowermost flow path has an inflow section formed by the lowermost row of the first heat exchange tubes, the inflow section is upstream of the corresponding wave section, the inlets of the flow paths are located on the corresponding heat exchange tubes in the first group of heat exchange tube banks, the inlets of the middle flow paths are arranged adjacent to the inlet of the lowermost flow path, and the inlet of the uppermost flow path is separated from the inlet of the middle flow path by two heat exchange tubes, and the outlets of the flow paths are located on the corresponding heat exchange tubes in the sixth group of heat exchange tube banks.

[0014] In one of the embodiments, B=6, A=4, D=4, E=6, the flow paths of the middle two flow paths are arranged side by side, the inlets of the lowermost two flow paths are located on the lowermost row of the corresponding first heat exchange tubes and arranged adjacent, in the other flow paths except the lowermost flow path, the inlets of the flow paths are located on the corresponding heat exchange tubes in the first group of heat exchange tube banks, and the inlet of the second flow path is located above the inlet of the adjacent first flow path, the outlet of the uppermost flow path is located on the uppermost heat exchange tube in the fourth group of heat exchange tube banks, and the outlets of the other flow paths except the uppermost flow path are located on the corresponding heat exchange tubes in the sixth group of heat exchange tube banks.

[0015] In one of the embodiments, B=5, A=8, the flow paths are 5, each of the flow paths is wavy, the inlets of the two flow paths at the bottom are located on the corresponding first heat exchange pipes at the bottom row, and are arranged adjacently, in the flow paths other than the flow path at the bottom, the inlet of the second flow path is located above the inlet of the adjacent first flow path, and is separated from the inlet of the adjacent first flow path by one heat exchange pipe, the outlet of the flow path at the top is located on the top heat exchange pipe in the fourth column of the heat exchange pipe group, the outlets of the flow paths other than the flow path at the top are located on the corresponding heat exchange pipes in the fifth column of the heat exchange pipe group, the number of the heat exchange pipes included in the two flow paths other than the two flow paths at the bottom and the flow path at the top is equal, and is defined as the fourth flow path, and the number of the heat exchange pipes included in the fourth flow path is greater than the number of the heat exchange pipes included in the other flow paths.

[0016] In one of the embodiments, B=5, A=6, the flow paths are 6, the inlets of the two flow paths at the bottom are located on the corresponding first heat exchange pipes at the bottom row, and are arranged adjacently; the number of the heat exchange pipes included in the flow path at the bottom is n, the number of the heat exchange pipes corresponding to the two adjacent flow paths is different, and is n and m respectively, m>n, the flow path in which the number of the heat exchange pipes is defined as n is defined as the third flow path, and the flow path in which the number of the heat exchange pipes is defined as m is defined as the fourth flow path.

[0017] In one of the embodiments, the heat exchanger is applied to an air conditioner, and the air conditioner comprises a fan, and the fan is arranged at a position close to the fourth flow path.

[0018] The application further provides an air conditioner comprising the heat exchanger.

[0019] Compared with the prior art, in the heat exchanger provided by the application, the outlet of the flow path is located above the inlet (i.e. lower inlet and upper outlet), and the outlet of the second flow path is located above the outlet of the adjacent first flow path and the outlet of the first flow path is located above the inlet of the adjacent second flow path, such a design improves the height difference between the outlet and the inlet of the flow path, is beneficial to the water storage flowing out through the inlet under the action of gravity, reduces the possibility of water storage, and avoids the situation that the heat exchange pipes of the flow path are cracked by freezing. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or the prior art description will be briefly introduced as follows. Obviously, the accompanying drawings in the following description only only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained from these drawings without creative labor.

[0021] Figure 1 Part structure schematic diagram of the heat exchanger of the first embodiment of the present application;

[0022] Figure 2 Part structure schematic diagram of the heat exchanger of the second embodiment of the present application;

[0023] Figure 3 Part structure schematic diagram of the heat exchanger of the third embodiment of the present application;

[0024] Figure 4 Part structure schematic diagram of the heat exchanger of the fourth embodiment of the present application;

[0025] Figure 5 Part structure schematic diagram of the heat exchanger of the fifth embodiment of the present application;

[0026] Figure 6 Part structure schematic diagram of the heat exchanger of the sixth embodiment of the present application;

[0027] Figure 7 Structure schematic diagram of the combined machine of the present application;

[0028] Figure 8 Structure schematic diagram of the cabinet machine of the present application;

[0029] Figure 9 Structure schematic diagram of the DCC dry coil unit of the present application.

[0030] The accompanying drawings are as follows: 1, flow path; 1a, inlet flow section; 1b, wave section; 101, inlet; 102, outlet; 11, first flow path; 12, second flow path; 13, third flow path; 14, fourth flow path; 2, connecting plate; 21, first side edge; 22, second side edge; 3, first heat exchange pipe group; 31, first heat exchange pipe; 4, second heat exchange pipe group; 41, second heat exchange pipe. DETAILED DESCRIPTION

[0031] In order to make the above objectives, features and advantages of the present application more clear and comprehensible, the detailed description of the specific embodiments of the present application is made below in conjunction with the accompanying drawings. In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many different ways other than those described herein, and one of ordinary skill in the art can make similar improvements without departing from the spirit of the present application, and therefore the present application is not limited to the specific embodiments disclosed below.

[0032] It should be noted that when a component is referred to as being "on" or "disposed on" another component, it can be directly on the other component or there can be intervening components. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or there can be intervening components. The terms "vertical", "horizontal", "upper", "lower", "left", "right", "side", "top", "bottom", and similar terms as used in the description of the application are used for describing various example structural portions and elements of the application, but are used for convenience in describing the application and are not intended to be limiting. Since the embodiments disclosed in the application can be arranged in different directions, these terms indicating directions are used for illustration and should not be considered as limiting, such as "upper" and "lower" are not necessarily limited to the direction opposite or consistent with the direction of gravity.

[0033] In addition, the terms "first", "second", etc. are used only for descriptive purposes and should not be construed as indicating or implying relative importance or an indicated number of technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0034] In the present application, unless otherwise specifically defined and limited, the "on", "under", "above" and "over" of the first feature to the second feature can be that the first feature is in direct contact with the second feature, or the first feature is indirectly in contact with the second feature through an intermediate medium. Moreover, the "on", "above" and "over" of the first feature to the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height. The "under", "below" and "under" of the first feature to the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature is lower than the second feature in horizontal height.

[0035] It should be noted that "axial arrangement" means that the overall arrangement direction is along the axial direction, including but not limited to axial extension, which can be at an angle with the axial direction.

[0036] Unless otherwise defined, all technical and scientific terms used in the application's specification have the same meaning as commonly understood by one of ordinary skill in the art to which the application belongs. The terminology used in the application's specification is for describing particular embodiments only and is not intended to be limiting of the application. The use of the terms "and / or" includes a combination of one or more of the associated listed items.

[0037] As shown in Figures 1-9 The application provides a heat exchanger. The heat exchanger comprises a plurality of flow paths 1 arranged along the height direction of the heat exchanger. The flow path 1 has an inlet 101 and an outlet 102 located above the inlet 101 along the height direction of the heat exchanger, so that the fluid flows upward. The lower flow path 1 in the adjacent two flow paths 1 is defined as the first flow path 11, and the upper flow path 1 is defined as the second flow path 12. The outlet 102 of the second flow path 12 is located above the outlet 102 of the adjacent first flow path 11, and the outlet 102 of the first flow path 11 is located above the inlet 101 of the adjacent second flow path 12.

[0038] It can be understood that the outlet 102 of each flow path 1 is located above the inlet 101 (i.e. lower inlet and upper outlet), and the outlet 102 of the second flow path 12 is located above the outlet 102 of the adjacent first flow path 11, and the outlet 102 of the first flow path 11 is located above the inlet 101 of the adjacent second flow path 12. Such design improves the height difference between the outlet 102 and the inlet 101 of the flow path 1, which is beneficial to make the stored water flow out through the inlet 101 under the action of gravity, reduces the possibility of water storage, and avoids the situation that the heat exchange tube of the flow path 1 is cracked by freezing.

[0039] In the present specification, referring to Figure 1 The vertical direction is the height direction y of the heat exchanger, and the width direction of the heat exchanger is z.

[0040] The heat exchanger comprises a vertically arranged connecting plate 2 and a heat exchange tube group. The heat exchange tube group has B columns and is arranged along the width direction of the heat exchanger. Each column of the heat exchange tube group comprises A rows of heat exchange tubes arranged along the height direction of the connecting plate 2 and having an elliptical cross section. The two side edges of the connecting plate 2 along the width direction of the heat exchanger are defined as the first side edge 21 and the second side edge 22, respectively. The inlet 101 of each flow path 1 is arranged on the heat exchange tube close to the first side edge 21, and the outlet 102 of each flow path 1 is arranged on the heat exchange tube close to the second side edge 22. The flow path 1 is formed by the corresponding heat exchange tubes in sequence. The number of heat exchange tubes contained in each flow path 1 is n, and n is an even number.

[0041] It can be understood that the inlet 101 and the outlet 102 of the flow path 1 after flowing can be ensured to be located on the same side of the connecting plate 2. And compared with the circular tube with a circular cross section, the heat exchange tube with an elliptical cross section can arrange more heat exchange tubes under the condition of the same size of the heat exchanger, which not only improves the heat exchange efficiency, but also reduces the required heat exchange area. In addition, the design of the heat exchange tube with an elliptical cross section can make the flow characteristic outside the heat exchange tube good, that is, the resistance of the air side is reduced, and the heat exchange coefficient of the outside of the heat exchange tube is increased, which helps to improve the heat exchange performance of the heat exchanger.

[0042] The two adjacent heat exchange tube groups are defined as the first heat exchange tube group 3 and the second heat exchange tube group 4. The heat exchange tubes in the first heat exchange tube group 3 are defined as the first heat exchange tubes 31, and the heat exchange tubes in the second heat exchange tube group 4 are defined as the second heat exchange tubes 41. The first heat exchange tubes 31 are arranged in a staggered manner with the second heat exchange tubes 41, and the lowermost row of the first heat exchange tubes 31 is located below the lowermost row of the second heat exchange tubes 41. The uppermost row is the second heat exchange tube 41, that is, in the heat exchanger, the lowermost row is the first heat exchange tube 31, and the uppermost row is the second heat exchange tube 41. The uppermost row refers to the row located on the uppermost along the height direction of the heat exchanger. The lowermost row refers to the row located on the lowermost along the height direction of the heat exchanger. The first column of heat exchange tube group closest to the first side edge 21 is the first heat exchange tube group 3, and the first heat exchange tube group 3 and the second heat exchange tube group 4 are arranged in turn along the width direction of the heat exchanger. That is, the even columns are all the second heat exchange tube group 4, and the odd columns are all the first heat exchange tube group 3. For example, when there are even columns, the Bth column is the second heat exchange tube group 4, and when there are odd columns, the Bth column is the first heat exchange tube group 3.

[0043] Referring to Figure 1 , the height of the connecting plate 2 is defined as H, the length of the connecting plate 2 along the width direction of the heat exchanger is defined as L, the distance between the top edge of the uppermost row of heat exchange tubes and the top edge of the connecting plate 2 is defined as d1, the distance between the bottom edge of the lowermost row of heat exchange tubes and the bottom edge of the connecting plate 2 is defined as d2, the distance between the centers of the ellipses of two adjacent heat exchange tubes along the height direction of the connecting plate 2 is defined as d3, the distance between the side edge of the heat exchange tube closest to the first side edge 21 and the first side edge 21 is defined as d4, the distance between the side edge of the heat exchange tube closest to the second side edge 22 and the second side edge 22 is defined as d5, and the distance between the centers of the ellipses of two adjacent heat exchange tubes along the length direction of the connecting plate 2 is defined as d6, that is, the distance d6 between the centers of the ellipses of two adjacent heat exchange tubes along the width direction z of the heat exchanger. A, H, d1 and d2 satisfy: A=(H-d1-d2) / d3, B=(L-d4-d5) / d6, the length of the heat exchange tube is M, the flow path 1 has D rows, D=(A*B*M) / C, wherein C is 7-9, D is an integer, the heat exchange tube in the flow path 1 has E, E=A*B / D.

[0044] Understandably, by designing the above formula, while making full use of the heat exchanger space, improving heat exchange efficiency, and reducing the possibility of water accumulation in flow path 1, the number of columns and rows of heat exchange tube groups installed in the heat exchanger, as well as the number of flow paths 1 and the number of heat exchange tubes contained in flow path 1, can be determined. This eliminates the need for continuous actual trials to determine the number of flow paths 1 and the number of heat exchange tubes contained in flow path 1, making it more convenient, faster, and better able to meet actual needs while saving costs.

[0045] In one embodiment, the spacing d1 and d2 are not equal, and the spacing d4 and d5 are not equal. In this embodiment, the spacing d1 and d2 are equal, and the spacing d4 and d5 are equal. In this embodiment, d1 to d4 are all 20 mm, d3 is 26 mm, and d6 is 30 mm. The length M of the heat exchange tube ranges from 100 mm to 4000 mm, and the length of the heat exchange tube is selected according to actual needs.

[0046] The heat exchanger designed according to the above formula will be further illustrated through the following specific embodiments. However, those skilled in the art will understand that the following embodiments are for illustrative purposes only and should not be considered as limiting the scope of the present invention.

[0047] The heat exchange tube group closest to the first side edge 21 is defined as the first column of heat exchange tubes, and the heat exchange tube group closest to the second side edge 22 is defined as the Bth column of heat exchange tubes. At least a portion of the inlet 101 of each flow path 1 is located on the corresponding heat exchange tube in the first column of heat exchange tubes, and at least a portion of the outlet 102 of each flow path 1 is located on the corresponding heat exchange tube in the Bth column of heat exchange tubes. Each flow path 1 includes a wave section 1b that causes the fluid to flow upward. It is understood that the presence of the wave section 1b allows the outlet 102 in the flow path 1 to be located above the inlet 101, further reducing the possibility of water accumulation in the flow path 1.

[0048] In the first embodiment, as Figure 1As shown, B = 3, A = 8, D = 4, E = 6, each flow path 1 includes an inlet section 1a upstream of the corresponding wave section 1b. The inlet section 1a of the flow path 1 at the bottom is formed by the first heat exchange tubes 31 in the bottom row, and the inlet sections 1a of the other flow paths 1 are arranged in sequence from bottom to top, and are formed by the first heat exchange tubes 31 in the adjacent two rows of the first heat exchange tube group in sequence from bottom to top. The outlet 102 of the flow path 1 at the top is located on the topmost heat exchange tube 41 in the second heat exchange tube group 4. The outlets 102 of the other flow paths 1 are located on the corresponding heat exchange tubes in the third heat exchange tube group, which is the second heat exchange tube group 4. The flow path at the top is the flow path at the top along the height direction of the heat exchanger. In this embodiment, the outlets 102 of the adjacent two flow paths 1 are separated by one heat exchange tube, and the outlet 102 of the flow path 1 at the bottom is separated from the heat exchange tube in the bottom row by one heat exchange tube. The flow path at the bottom is the flow path at the bottom along the height direction of the heat exchanger.

[0049] In the second embodiment, as shown in Figure 2 B = 6, A = 6, D = 3, E = 12, the flow paths of the flow paths 1 are different, the flow path 1 at the bottom has an inlet section 1a formed by the first heat exchange tubes 31 in the bottom row, and the inlet section 1a is located upstream of the corresponding wave section 1b. The other flow paths are wavy. The inlets 101 of the flow paths 1 are located on the corresponding heat exchange tubes in the first heat exchange tube group, the inlets 101 of the flow paths 1 in the middle are arranged adjacent to the inlet 101 of the flow path 1 at the bottom, the inlet 101 of the flow path 1 at the top is separated from the inlet 101 of the flow path 1 in the middle by one heat exchange tube, and the outlets 102 of the flow paths 1 are located on the corresponding heat exchange tubes in the sixth heat exchange tube group. In this embodiment, the sixth heat exchange tube group is the second heat exchange tube group 4, the outlets 102 of the two flow paths 1 at the top are arranged adjacent to each other, the outlets 102 of the two flow paths 1 other than the flow path 1 at the top are separated by one second heat exchange tube 41, and the outlet 102 of the flow path 1 at the bottom is separated from the second heat exchange tube 41 at the bottom by one second heat exchange tube 41.

[0050] In the third embodiment, as shown in Figure 3As shown, B = 6, A = 8, D = 3, E = 16, the flow paths of the flow channels 1 are different, and the flow channel 1 at the bottom has an inlet section 1a formed by the first heat exchange tubes 31 at the bottom row being connected, and the inlet section 1a is located upstream of the corresponding wave section 1b. The other flow channels 1 are in a wave shape. The inlets 101 of the flow channels 1 are respectively located on the corresponding heat exchange tubes in the first column of heat exchange tube groups, the inlet 101 of the flow channel 1 at the middle is arranged adjacent to the inlet 101 of the flow channel 1 at the bottom, and the inlet 101 of the flow channel 1 at the top is separated by two heat exchange tubes from the inlet 101 of the flow channel 1 at the middle. The outlets 102 of the flow channels 1 are all located on the corresponding heat exchange tubes in the sixth column of heat exchange tube groups, and the sixth column is the second heat exchange tube group 4. In this embodiment, the outlets 102 of the two flow channels 1 at the top are arranged adjacent to each other, and the outlets 102 of the two flow channels 1 except for the flow channel 1 at the top are separated by two second heat exchange tubes 41. The outlets 102 of the two flow channels 1 at the bottom are also separated by two second heat exchange tubes 41.

[0051] In the fourth embodiment, as shown in Figure 4 B = 6, A = 4, D = 4, E = 6, the flow paths of the two flow channels 1 at the middle are arranged side by side, the inlets 101 of the two flow channels 1 at the bottom are respectively located on the corresponding first heat exchange tubes 31 at the bottom row and arranged adjacent to each other, the inlets 101 of the flow channels 1 except for the flow channel 1 at the bottom are respectively located on the corresponding heat exchange tubes in the first column of heat exchange tube groups, and the inlet 101 of the second flow channel 12 is located above the inlet 101 of the adjacent first flow channel 11. The outlet 102 of the flow channel 1 at the top is located on the top heat exchange tube in the fourth column of heat exchange tube groups. The outlets 102 of the flow channels 1 except for the flow channel 1 at the top are respectively located on the corresponding heat exchange tubes in the sixth column of heat exchange tube groups, and the fourth column and the sixth column are both the second heat exchange tube group 4. In this embodiment, the outlets 102 of the flow channels 1 except for the flow channel 1 at the top are arranged adjacent to each other, and the outlet 102 of the flow channel 1 at the bottom is arranged adjacent to the second heat exchange tube 41 at the bottom.

[0052] The direction extending from the first side edge 21 to the second side edge 22 is defined as the first direction x, and the first direction x is located in the width direction of the heat exchanger. In addition, in the fourth embodiment described above, the two flow channels 1 at the middle are both gradually inclined upward along the first direction x.

[0053] In the fifth embodiment, as shown in Figure 5As shown, B = 5, A = 6, there are 6 flow paths 1 (D = 6), the inlets 101 of the two flow paths 1 at the bottom are located on the corresponding first heat exchange pipes 31 in the bottom row, and are arranged adjacently; the number of heat exchange pipes contained in the flow path 1 at the bottom is n, the numbers of heat exchange pipes contained in the two adjacent flow paths 1 are different, and are n and m respectively, the flow path 1 in which the number of heat exchange pipes contained is defined as n is defined as the third flow path 13, and the flow path 1 in which the number of heat exchange pipes contained is defined as m is defined as the fourth flow path 14, obviously, the length of the fourth flow path 14 is greater than that of the third flow path 13. Wherein, m = 6, n = 4. The inlets 101 of the third flow paths 13 other than the flow path 1 at the bottom are all located on the corresponding heat exchange pipes in the second column of heat exchange groups; the inlets 101 of the fourth flow paths 14 are all located on the corresponding heat exchange pipes in the first column of heat exchange groups. In this embodiment 5, there are 3 third flow paths 13 and 3 fourth flow paths 14.

[0054] In this embodiment 5, the two third flow paths 13 in the middle gradually incline upward along the first direction x. The third flow path 13 at the bottom is formed by the inflow section 1a connected by the first heat exchange pipe 31 at the bottom in the third column and the first heat exchange pipe 31 at the bottom in the fifth column, and the wave section 1b downstream of the inflow section 1a.

[0055] In the fifth embodiment designed according to the above formula, the flow path 1 should have 5, but the water resistance cannot meet the national standard, so while considering the above formula, the water resistance that meets the national standard should also be considered, and the number of flow paths 1 and the number of heat exchange pipes are adjusted to fully utilize the space of the heat exchanger while meeting the heat exchange efficiency of the heat exchanger.

[0056] In the sixth embodiment, as shown, Figure 6 B = 5, A = 8, there are 5 flow paths 1, each flow path 1 is in a wave shape, the inlets 101 of the two flow paths 1 at the bottom are located on the corresponding first heat exchange pipes 31 in the bottom row, and are arranged adjacently, among the flow paths 1 other than the flow path 1 at the bottom, the inlet 101 of the second flow path 12 is located above the inlet 101 of the adjacent first flow path 11, and is separated from the inlet 101 of the adjacent first flow path 11 by one heat exchange pipe, the outlet 102 of the flow path 1 at the top is located on the top heat exchange pipe in the fourth column of heat exchange pipe groups, the outlets 102 of the flow paths 1 other than the flow path 1 at the top are respectively located on the corresponding heat exchange pipes in the fifth column of heat exchange pipe groups, the numbers of heat exchange pipes corresponding to the two flow paths 1 other than the two flow paths 1 at the bottom and the flow path 1 at the top are both 10, and are both defined as the fourth flow path 14, the number of heat exchange pipes contained in the fourth flow path 14 is greater than the number of heat exchange pipes contained in the other flow paths 1.

[0057] In the sixth embodiment described above, the number of heat exchange tubes included in the uppermost flow path 1 and the lowermost flow path 1 is 6, and the number of heat exchange tubes included in the flow path 1 between the fourth flow path 14 and the lowermost flow path 1 is 8. The outlet 102 of the flow path 1 other than the lowermost flow path 1 and the uppermost flow path 1 is spaced apart from the first heat exchange tube 31 by one. The outlet 102 of the lowermost flow path 1 is spaced apart from the lowermost first heat exchange tube 31 by one. The outlet 102 of the uppermost fourth flow path 14 is located on the uppermost first heat exchange tube 31 of the fifth column.

[0058] The application also provides an air conditioner, which comprises the heat exchanger, i.e. the heat exchanger of each of the above embodiments is applied to the air conditioner, and the air conditioner comprises a fan. Figure 7 As shown in the figure, the aforementioned air conditioner is a combination machine. Figure 8 As shown in the figure, the aforementioned air conditioner is a cabinet machine. Figure 9 As shown in the figure, the aforementioned air conditioner is a DCC dry coil unit.

[0059] For the fifth and sixth embodiments described above, the fan is arranged at a position close to the fourth flow path 14, i.e. at a position of the longer flow path 1 close to the upper middle part.

[0060] As can be seen from the above embodiments of the application, when the number of flow paths in the heat exchanger is reduced, i.e. the flow rate of the fluid entering each flow path is increased, which leads to an increase in the flow velocity, and the increase in the flow velocity increases the convective heat transfer coefficient inside the heat exchange tube, thereby increasing the heat transfer coefficient, resulting in an increase in the heat exchange effect of the heat exchanger. The increase in the flow velocity can change the flow state of the fluid and improve the degree of turbulent pulsation, thereby enhancing the heat transfer effect and achieving the purpose of improving the heat exchange efficiency. At the same time, the increase in the flow velocity leads to an increase in the water resistance, which leads to a decrease in the heat transfer temperature difference (logarithmic mean temperature difference), and the increase in the water resistance leads to an increase in the energy consumption of the entire system.

[0061] It can be understood that increasing the length of the flow path 1 increases the contact time of air and heat exchange medium, which can expand the heat transfer area and improve the heat transfer efficiency. When the fan is arranged at a position of the longer flow path 1, the fan can increase the residence time of air in the heat exchanger when working, thereby improving the heat exchange efficiency. In addition, it is also possible to reduce the vortex, thereby facilitating the uniformity of air flow.

[0062] The technical features of the above embodiments can be combined in any manner. In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described, however, as long as the combinations of the technical features do not exist contradictions, they should be considered as the scope of the present application.

[0063] The above-described embodiments are merely illustrative of several embodiments of the present application, which are described in more detail and in a specific manner, but should not be construed as limiting the scope of the patent application. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A heat exchanger, characterized in that, include: The flow path (1) has an inlet (101) and an outlet (102) located above the inlet (101) along the height direction of the heat exchanger to allow fluid to flow upward; There are multiple flow paths (1) and they are arranged at intervals along the height direction of the heat exchanger. Among two adjacent flow paths (1), the flow path (1) located below along the height direction of the heat exchanger is defined as the first flow path (11) and the flow path (1) located above is defined as the second flow path (12). The outlet (102) of the second flow path (12) is located above the outlet (102) of the adjacent first flow path (11), and the outlet (102) of the first flow path (11) is located above the inlet (101) of the adjacent second flow path (12).

2. The heat exchanger according to claim 1, characterized in that, The heat exchanger includes a vertically arranged connecting plate (2) and heat exchange tube groups. The heat exchange tube groups have B columns and are spaced apart along the width direction of the heat exchanger. Each column of the heat exchange tube groups includes A rows of heat exchange tubes spaced apart along the height direction of the connecting plate (2) and with an elliptical cross-section. The two sides of the connecting plate (2) along the width direction of the heat exchanger are defined as the first side edge (21) and the second side edge (22), respectively. The inlet (101) of each flow path (1) is located on the heat exchange tube near the first side edge (21), and the outlet (102) of each flow path (1) is located on the heat exchange tube near the second side edge (22). The flow path (1) is formed by sequentially connecting the corresponding heat exchange tubes. The number of heat exchange tubes included in each flow path (1) is n, where n is an even number.

3. The heat exchanger according to claim 2, characterized in that, The two adjacent columns of heat exchange tube groups are respectively the first heat exchange tube group (3) and the second heat exchange tube group (4). The heat exchange tube in the first heat exchange tube group (3) is defined as the first heat exchange tube (31), and the heat exchange tube in the second heat exchange tube group (4) is defined as the second heat exchange tube (41). The first heat exchange tube (31) and the second heat exchange tube (41) are arranged in a staggered manner. The first heat exchange tube (31) in the bottom row is located below the second heat exchange tube (41) in the bottom row. The second heat exchange tube (41) in the top row is the second heat exchange tube. The first column of heat exchange tube groups closest to the first side edge (21) is the first heat exchange tube group (3). The first heat exchange tube group (3) and the second heat exchange tube group (4) are arranged alternately along the width direction of the heat exchanger.

4. The heat exchanger according to claim 3, characterized in that, Define the height of the connecting plate (2) as H, the length as L, the distance between the top edge of the top row of heat exchange tubes and the top edge of the connecting plate (2) as d1, the distance between the bottom edge of the bottom row of heat exchange tubes and the bottom edge of the connecting plate (2) as d2, the distance between the elliptical centers of two adjacent heat exchange tubes in the height direction of the connecting plate (2) as d3, the distance between the side edge of the heat exchange tube closest to the first side edge (21) and the first side edge (21) as d4, and the distance between the side edge of the heat exchange tube closest to the second side edge (21) as d4. The distance between the side edge of the heat exchange tube (22) and the second side edge (22) is d5, the distance between the elliptical centers of two adjacent heat exchange tubes in the length direction of the connecting plate (2) is d6, A, H, d1 and d2 satisfy: A=(H-d1-d2) / d3, B=(L-d4-d5) / d6, the length of the heat exchange tube is M, the flow path (1) has D lines, D=(A*B*M) / C, where C is 7~9, D is an integer, the heat exchange tube in the flow path (1) has E lines, E=A*B / D.

5. The heat exchanger according to claim 4, characterized in that, Spacing d1 is equal to spacing d2, and spacing d4 is equal to spacing d5.

6. The heat exchanger according to claim 4 or 5, characterized in that, The heat exchange tube group closest to the first side edge (21) is defined as the first column of heat exchange tube groups, and the heat exchange tube group closest to the second side edge (22) is defined as the Bth column of heat exchange tube groups. At least a portion of the inlet (101) of each flow path (1) is located on the corresponding heat exchange tube in the first column of heat exchange tube groups, and at least a portion of the outlet (102) of each flow path (1) is located on the corresponding heat exchange tube in the Bth column of heat exchange tube groups. Each flow path (1) includes a wave section (1b) that causes the fluid to flow upward.

7. The heat exchanger according to claim 6, characterized in that, B=3, A=8, D=4, E=6, each of the flow paths (1) includes an inlet section (1a) located upstream of the corresponding wave segment (1b). The inlet section (1a) of the lowest flow path (1) is formed by connecting the first heat exchange tubes (31) in the lowest row. The inlet sections (1a) of the other flow paths (1) are arranged sequentially from bottom to top and are formed by connecting the first heat exchange tubes (31) in adjacent rows in the first column of heat exchange tubes sequentially from bottom to top. The outlet (102) of the highest flow path (1) is located on the highest heat exchange tube in the second column of heat exchange tubes. The outlets (102) of the other flow paths (1) are located on the heat exchange tubes corresponding to the third column of heat exchange tubes.

8. The heat exchanger according to claim 6, characterized in that, B=6, A=6, D=3, E=12, and the flow paths of each flow path (1) are different. The flow path (1) at the bottom has an inlet section (1a) formed by connecting the first heat exchange tube (31) in the bottom row. The inlet section (1a) is located upstream of the corresponding wave section (1b). The inlet (101) of each flow path (1) is located on the corresponding heat exchange tube in the first column of the heat exchange tube group. The inlet (101) of the middle flow path (1) is arranged adjacent to the inlet (101) of the bottom flow path (1). The inlet (101) of the top flow path (1) is separated from the inlet (101) of the middle flow path (1) by one heat exchange tube. The outlet (102) of each flow path (1) is located on the heat exchange tube corresponding to the sixth column of the heat exchange tube group.

9. The heat exchanger according to claim 6, characterized in that, B=6, A=8, D=3, E=16, and the flow paths of each flow path (1) are different. The lowest flow path (1) has an inlet section (1a) formed by connecting the first heat exchange tube (31) in the lowest row. The inlet section (1a) is located upstream of the corresponding wave section (1b). The inlet (101) of each flow path (1) is located on the corresponding heat exchange tube in the first column of the heat exchange tube group. The inlet (101) of the middle flow path (1) is arranged adjacent to the inlet (101) of the lowest flow path (1). The inlet (101) of the uppermost flow path (1) is separated from the inlet (101) of the middle flow path (1) by two heat exchange tubes. The outlet (102) of each flow path (1) is located on the heat exchange tube corresponding to the sixth column of the heat exchange tube group.

10. The heat exchanger according to claim 6, characterized in that, B=6, A=4, D=4, E=6. The flow paths of the two middle flow paths (1) are arranged side by side. The inlets (101) of the two bottom flow paths (1) are respectively located on the bottom row corresponding to the first heat exchange tube (31) and are arranged adjacent to each other. In the other flow paths (1) except the bottom flow path (1), the inlet (101) of each flow path (1) is respectively located on the heat exchange tube corresponding to the first column of the heat exchange tube group. The inlet (101) of the second flow path (12) is located above the inlet (101) of the adjacent first flow path (11). The outlet (102) of the top flow path (1) is located on the topmost heat exchange tube in the fourth column of the heat exchange tube group. The outlets (102) of the other flow paths (1) except the top flow path (1) are respectively located on the heat exchange tube corresponding to the sixth column of the heat exchange tube group.

11. The heat exchanger according to claim 3, characterized in that, B=5, A=8, there are 5 flow paths (1), each flow path (1) is wavy. The inlets (101) of the two lowest flow paths (1) are located on the first heat exchange tube (31) in the bottom row and are arranged adjacent to each other. Among the other flow paths (1) except the lowest flow path (1), the inlet (101) of the second flow path (12) is located above the inlet (101) of the adjacent first flow path (11) and is separated from the inlet (101) of the adjacent first flow path (11) by one heat exchange tube. The outlet (102) of the flow path (1) is located on the uppermost heat exchange tube in the fourth column of the heat exchange tube group. The outlets (102) of the other flow paths (1) besides the uppermost flow path (1) are respectively located on the heat exchange tubes corresponding to the fifth column of the heat exchange tube group. The two flow paths (1) other than the lowermost two flow paths (1) and the uppermost flow path (1) contain the same number of heat exchange tubes and are both defined as the fourth flow path (14). The number of heat exchange tubes contained in the fourth flow path (14) is greater than the number of heat exchange tubes contained in the other flow paths (1).

12. The heat exchanger according to claim 3, characterized in that, B=5, A=6, there are 6 flow paths (1), the inlets (101) of the two flow paths (1) at the bottom are respectively located on the first heat exchange tube (31) in the bottom row and are arranged adjacent to each other; the number of heat exchange tubes contained in the bottom flow path (1) is n, the number of heat exchange tubes contained in the two adjacent flow paths (1) is different, and is n and m respectively, m>n. The flow path (1) with n heat exchange tubes is defined as the third flow path (13), and the flow path (1) with m heat exchange tubes is defined as the fourth flow path (14).

13. The heat exchanger according to claim 11 or 12, characterized in that, The heat exchanger is used in an air conditioner, which includes a fan located near the fourth flow path (14).

14. An air conditioner, comprising a heat exchanger, characterized in that, The heat exchanger is the heat exchanger according to any one of claims 1 to 13.

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