CN222733002U - Heat exchanger and waste heat recovery system - Google Patents

Abstract

The utility model provides a heat exchanger and a waste heat recovery system, wherein the heat exchanger comprises a first heat exchange assembly, a second heat exchange assembly and a plurality of second flat pipes, wherein the first heat exchange assembly comprises a first collecting pipe group, the first collecting pipe group comprises two first collecting pipes, the first flat pipes are arranged at intervals along the axial direction of the first collecting pipes, the second heat exchange assembly comprises a second collecting pipe group, the second collecting pipe group comprises a second collecting pipe, the second flat pipes are arranged at intervals along the axial direction of the second collecting pipe, the first heat exchange assembly comprises a plurality of first heat exchange fins, and the first heat exchange fins are arranged between two adjacent first flat pipes and are connected with at least one of the two adjacent first flat pipes in a conducting mode. The heat exchanger provided by the utility model can be efficiently applied to heat recovery of the condenser on the air-cooled heat pump, and can be applied to a hot water supply system for waste heat recovery, so that the heat of the condenser is effectively utilized, and the effects of energy conservation and emission reduction are achieved.

Description

Heat exchanger and waste heat recovery system

Technical Field

The utility model relates to the technical field of waste heat recovery equipment, in particular to a heat exchanger and a waste heat recovery system.

Background

At present, the existing waste heat recovery system for an air conditioning system is widely applied to buildings with stable hot water requirements due to obvious energy saving effect, the existing air conditioning system mainly comprises a water chilling unit for refrigerating circulation and an air cooling heat pump for driving, for example, in a concentrated cooling building, a large amount of condensation heat is concentrated at a condenser of the air conditioning system, particularly the condenser on the air cooling heat pump, the condensation heat is more, the potential of being recovered and utilized is huge, when the heat exchanger is applied to the circulating system of the air cooling heat pump for heat recovery, the heat of the condenser on the air cooling heat pump is usually discharged by virtue of the heat dissipation effect of a heat exchange component and a fan, so that indoor air is heated, the utilization of the waste heat of the condenser is completed, but in the process, the heat exchange efficiency between the existing heat exchange component and the condenser is low, the heat exchange effect is poor, the excessive heat on the condenser is not enough to exchange heat with the heat exchange component, and is lost along with the circulation of a heat conducting medium (such as a refrigerant) and the heat exchange with air, and heat waste is further caused.

In order to improve the energy utilization rate and realize energy saving, a heat exchanger and a waste heat recovery system which can be suitable for heat recovery of a condenser, particularly a condenser on an air-cooled heat pump, are needed.

Disclosure of utility model

The utility model provides a heat exchanger and a waste heat recovery system, which are used for solving the problem of poor heat exchange efficiency of a heat exchange assembly and a condenser in the prior art.

In order to solve the problems, according to one aspect of the utility model, a heat exchanger is provided, which comprises a first heat exchange assembly, wherein the first heat exchange assembly comprises a first collecting pipe group, a plurality of first flat pipes, a second heat exchange assembly, a plurality of second flat pipes, a plurality of heat exchange fins and a conduction fin, wherein the first collecting pipe group comprises a first collecting pipe group, the first collecting pipe group comprises two first collecting pipes which are arranged at intervals, the plurality of first flat pipes are arranged at intervals along the axial direction of the first collecting pipe group, the plurality of first heat exchange fins are arranged between two adjacent first flat pipes and are connected with at least one first collecting pipe at least, the second heat exchange assembly comprises a second collecting pipe group, the second collecting pipe group comprises two second collecting pipes which are arranged at intervals, the plurality of second flat pipes are arranged at intervals along the axial direction of the second collecting pipe group, the two ends of the second flat pipes are respectively connected with the two second collecting pipes at intervals, the second heat exchange fins are arranged along the width direction of the first flat pipes, the second heat exchange assembly and the first heat exchange fins are arranged between the two adjacent first flat pipes, the first heat exchange fins are connected with the two adjacent flat pipes at least one first flat pipes, and the two adjacent flat pipes extend out of the first flat pipes at least.

Further, the second heat exchange assembly comprises a plurality of second heat exchange fins, the second heat exchange fins are arranged between two adjacent second flat pipes and are in conductive connection with at least one of the two adjacent second flat pipes, and the extending parts of the first heat exchange fins are in conductive connection with at least one of the two adjacent second flat pipes through the second heat exchange fins.

Further, the first heat exchange fin comprises a first fixing fin and a first extending fin, the first fixing fin is arranged along the width direction of the first flat tube in parallel with at least one of two adjacent first flat tubes in conductive connection, the first extending fin extends out of the two adjacent first flat tubes to be arranged, one end of the first extending fin is in conductive connection with the first fixing fin, the other end of the first extending fin is in conductive connection with the second heat exchange fin, and/or the second heat exchange fin comprises a second fixing fin and a second extending fin, the second fixing fin is arranged along the width direction of the second flat tubes in parallel with at least one of two adjacent second flat tubes in conductive connection, the second extending fin extends out of the two adjacent second flat tubes to be arranged, one end of the second extending fin is in conductive connection with the second fixing fin, and the other end of the second extending fin is in conductive connection with the first heat exchange fin.

The first fixing fins and the first extending fins are wavy fins which are arranged in a wavy mode, the wavy fins are perpendicular to each other in length direction, width direction and height direction, the wavy fins are provided with front faces and rear faces which are arranged correspondingly in length direction, the wavy fins are provided with left faces and right faces which are arranged correspondingly in width direction, the wavy fins are provided with upper faces and lower faces which are arranged correspondingly in height direction, one face of each of the front faces and the rear faces of the first extending fins extends between the two first flat tubes, the other face of each of the front faces and the rear faces of the first extending fins is connected with the front face or the rear face of the first fixing fins, the projection of each of the wavy fins in a plane formed by the height direction and the width direction is in a corrugated mode, the corrugations of each of the wavy fins extend to be parallel to the length direction, and the width direction of each of the first fixing fins is inclined with the width direction of each of the first extending fins.

The heat exchange device comprises a plurality of first flat tubes, a plurality of first extending fins, a plurality of first fixing fins, a plurality of first extending fins, a plurality of second extending fins, a plurality of first fixing fins, a plurality of first heat exchange lines, a plurality of second fixing fins, a plurality of first extending fins, a plurality of second heat exchange lines, a plurality of first heat exchange lines and a plurality of second heat exchange lines, wherein the first fixing fins are arranged between two adjacent first flat tubes and are used as a plurality of fixing heat exchange lines, the upper faces and the lower faces of the plurality of first fixing fins are respectively parallel to the extending direction of the first flat tubes, the upper faces and the lower faces of the plurality of first extending fins are respectively coplanar, the plurality of first extending fins are arranged between two adjacent first flat tubes and are used as an extending heat exchange line, the plurality of first extending fins are arranged at equal intervals along the extending direction of the first flat tubes, the upper faces and the lower faces of the plurality of first extending fins are respectively parallel to the extending direction of the first flat tubes, and the front faces or the rear faces of the first extending fins are connected with the second heat exchange fins in a conducting mode in the length direction.

Further, the portion of the first heat exchange fin extending between the adjacent two first flat tubes is disposed between the adjacent two second flat tubes.

The first collecting pipe and the second collecting pipe are arranged in parallel at intervals, wherein a plurality of first flat pipes and a plurality of second flat pipes are arranged in parallel at intervals in a one-to-one correspondence mode, the space between the first flat pipes and the second flat pipes is WCP, the width of each first flat pipe is W1, the WCP is not more than 0.8W1 and not more than 5W1, and/or the first collecting pipe and the second collecting pipe are arranged in parallel at intervals, the first flat pipes and the second flat pipes are arranged in parallel at intervals in a one-to-one correspondence mode, the space between the first flat pipes and the second flat pipes is WCP, the width of each second flat pipe is W2, and the WCP is not more than 0.8W2 and not more than 5W2.

Further, a plurality of first slots penetrating the peripheral wall of the first collecting pipe along the wall thickness direction of the first collecting pipe are arranged on the peripheral wall of the first collecting pipe, the width direction of each first slot is parallel to the axial direction of the first collecting pipe, the plurality of first slots are arranged at intervals along the axial direction of the first collecting pipe, the distance between the adjacent first slots in the axial direction of the first collecting pipe is greater than four times of the width of the first slots, and/or a plurality of second slots penetrating the peripheral wall of the second collecting pipe along the wall thickness direction of the second collecting pipe are arranged on the peripheral wall of the second collecting pipe, the width direction of each second slot is parallel to the axial direction of the second collecting pipe, the plurality of second slots are arranged at intervals along the axial direction of the second collecting pipe, and the distance between the adjacent second slots in the axial direction of the second collecting pipe is greater than four times of the width of the second slots.

Further, the first flat pipe is communicated with the two first collecting pipes to form a first passage, the second flat pipe is communicated with the two second collecting pipes to form a second passage, and the first passage and the second passage are respectively used for circulating two liquids with different temperatures.

According to another aspect of the utility model, a waste heat recovery system is provided, which comprises the heat exchanger, the waste heat recovery system further comprises an air conditioning system and a heat recovery device, the air conditioning system comprises a compressor, an evaporator, a throttling device and a first heat exchange component, the compressor, the evaporator, the throttling device and the first heat exchange component are sequentially communicated through pipelines to form a refrigerant circulation pipeline, the first heat exchange component is used as a condenser, the heat recovery device comprises a second heat exchange component, first heat exchange fins on the first heat exchange component are fixedly connected with the second heat exchange component in a welding mode, and the second heat exchange component collects part of heat emitted in the air by the first heat exchange component and transmits the part of heat to a heat exchange medium in the second heat exchange component.

The waste heat recovery system further comprises a water tank, a circulating pump and a fan, wherein the fan drives air to flow through the heat exchanger to perform convection heat exchange, the water tank, the circulating pump and the second heat exchange assembly are sequentially communicated through pipelines to form a heat exchange medium circulating pipeline, the circulating pump is used for driving heat exchange medium in the heat exchange medium circulating pipeline to flow, and the heat exchange medium in the heat exchange medium circulating pipeline conveys collected heat to the water tank for storage.

Further, the refrigerant circulation pipeline and the internal flow path of the heat exchange medium circulation pipeline are reversely arranged.

The utility model provides a heat exchanger, which comprises a first heat exchange component, a second heat exchange component and a heat exchange component, wherein the first heat exchange component comprises a first collecting pipe group, and the first collecting pipe group comprises two first collecting pipes which are arranged at intervals; the plurality of first flat pipes are arranged at intervals along the axial direction of the first collecting pipe, and two ends of each first flat pipe are respectively communicated with two first collecting pipes of the first collecting pipe group; the heat exchange device comprises a first heat exchange component and a second heat exchange component, wherein the first heat exchange component comprises a plurality of first collecting pipes, the first heat exchange component comprises a plurality of first heat collecting pipes, the first heat collecting pipes comprise two second collecting pipes which are arranged at intervals, the plurality of first flat pipes are arranged at intervals along the axial direction of the first collecting pipes, two ends of each first flat pipe are respectively communicated with the two first collecting pipes of the first collecting pipes, the first heat exchange component and the second heat exchange component are arranged in parallel along the width direction of each first flat pipe, the first heat exchange component comprises a plurality of first heat exchange fins which are arranged between the two adjacent first flat pipes and are in conductive connection with at least one of the two adjacent first flat pipes, the first heat exchange fins extend out of the two adjacent first flat pipes along the width direction of the first flat pipes, and the extending parts of the first heat exchange fins are in conductive connection with at least one of the two adjacent second flat pipes.

According to the heat exchanger, the first heat exchange fins are arranged between the two adjacent first flat pipes, a part of the first heat exchange fins extend out of a gap between the two adjacent first flat pipes, so that the first heat exchange components in the heat exchanger can be directly connected with the second heat exchange components through the first heat exchange fins for contact heat exchange, the plurality of first heat exchange fins are arranged at intervals, air flows through the gaps among the plurality of first heat exchange fins to perform convection heat exchange, the second heat exchanger can effectively collect diffuse heat in the air, the heat exchange efficiency of the heat exchanger is high through the cooperation of the two heat exchange modes of convection heat exchange and contact heat exchange, the whole heat exchange effect is good, the actual use requirement is effectively met, the heat exchanger provided by the utility model can be efficiently applied to a heat recovery of a condenser on an air-cooled heat pump (for example, the first heat exchange components are used as condensers), the heat exchanger can be applied to a hot water supply system for waste heat recovery, the heat exchange of the condenser is fully realized, the heat recovery of the condenser can be effectively utilized, the heat energy of the heat exchanger can be effectively utilized, the heat energy can be saved, the heat can be effectively saved, the heat can be supplied by the heat energy can be effectively reduced, the heat can be supplied by the heat supply system, the heat can not be supplied by the heat energy is saved, and the heat is not required by the system, and the heat is provided by the heat energy is greatly reduced by the energy and the system.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

Fig. 1 shows a specific structural schematic diagram of a heat exchanger according to a first embodiment of the present utility model;

FIG. 2 is a schematic diagram showing a specific structure of a first heat exchange assembly according to a first embodiment of the present utility model;

FIG. 3 is a schematic view showing the matching of a row of first heat exchange fins and two first flat tubes according to the first embodiment of the present utility model;

fig. 4 shows a schematic diagram of the matching of a row of first heat exchange fins and two first flat tubes according to the second embodiment of the utility model;

fig. 5 shows a specific structural schematic diagram of a first heat exchange assembly according to a third embodiment of the present utility model;

Fig. 6 shows a schematic diagram of the cooperation of the fixed heat exchange column, the extended heat exchange column and the two first flat tubes according to the third embodiment of the present utility model;

Fig. 7 is a schematic view showing a part of the structure of a waste heat recovery system according to an embodiment of the present utility model;

Fig. 8 shows a schematic view of the structure of the first heat exchange fin according to the embodiment of the present utility model when the first heat exchange fin is a wave-shaped fin.

Wherein the above figures include the following reference numerals:

1. a first heat exchange assembly; 2, a second heat exchange component, 3, a throttling device;

10. A first header;

20. A first flat tube;

30. First heat exchange fins, 31, front face, 32, rear face, 33, left face, 34, right face, 35, upper face, 36, lower face, 37, first fixing fins, 38, first extending fins;

41. 42, extending out of the heat exchange column;

50. protecting the side plates;

60. a compressor;

70. an evaporator;

80. The condenser, 81, the second collecting pipe, 82, the second flat pipe;

90. a water tank.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1 to 8, an embodiment of the present utility model provides a heat exchanger, which comprises a first heat exchange assembly 1, wherein the first heat exchange assembly 1 comprises a first collecting tube group, the first collecting tube group comprises two first collecting tubes 10 which are arranged at intervals, a plurality of first flat tubes 20, the plurality of first flat tubes 20 are arranged at intervals along the axial direction of the first collecting tubes 10, two ends of each first flat tube 20 are respectively communicated with two first collecting tubes 10 of the first collecting tube group, a second heat exchange assembly 2 comprises a second collecting tube group, the second collecting tube group comprises two second collecting tubes 81 which are arranged at intervals, a plurality of second flat tubes 82 are arranged at intervals along the axial direction of the second collecting tubes 81, two ends of each second flat tube 82 are respectively communicated with two second collecting tubes 81 of the second collecting tube group, the second heat exchange assembly 2 and the first heat exchange assembly 1 are arranged along the width direction of each first flat tube 20, wherein the first heat exchange assembly 1 comprises a plurality of first heat exchange fins 30, the first heat exchange fins 30 are arranged between two adjacent flat tubes 20 and extend out of at least two adjacent flat tubes 20, and at least two adjacent flat tubes 30 extend out of the width direction of the first flat tubes 20, and at least two adjacent flat tubes 30 extend out of the first heat exchange fins 30 extend from the first flat tubes.

According to the heat exchanger provided by the utility model, the first heat exchange fins 30 are arranged between the adjacent two first flat pipes 20, and part of the first heat exchange fins 30 extend out of the gap between the adjacent two first flat pipes 20, so that the first heat exchange component 1 and the second heat exchange component 2 in the heat exchanger can be directly connected through the first heat exchange fins (for example, the first heat exchange component 1 can serve as a condenser 80 in an air conditioning system) to perform contact heat exchange, the air flows through the gaps between the plurality of first heat exchange fins 30 at intervals through the arrangement of the plurality of first heat exchange fins 30, convection heat exchange can be performed, and further, the heat exchanger (for example, the second heat exchange component 2) can effectively collect diffuse heat in the air, the heat exchange efficiency of the heat exchanger provided by the utility model is higher through the cooperation of the two heat exchange modes of convection heat exchange and contact heat exchange, the whole heat exchange effect is good, the actual use requirement is effectively met, the heat exchanger provided by the heat exchanger can be efficiently used for heat recovery of the condenser 80 on an air-cooled heat pump, the heat exchanger can be applied to the heat recovery of the heat exchanger 80, the heat exchanger can be supplied by the heat exchanger, the heat exchanger can be fully supplied by the heat exchanger 80, the energy is fully utilized, the heat exchanger is not supplied by the heat exchanger 80, the heat exchanger is fully supplied by the energy is fully, and the heat-saving system is fully consumed by the heat-saving system, and energy is fully consumed by the heat is reduced by the heat energy, and the heat is fully consumed by the heat energy is saved.

It should be noted that the "conductive connection" in the present utility model refers to a connection manner capable of implementing heat conduction, for example, a manner of directly connecting to implement contact heat exchange, a manner of spacing to implement convection heat exchange or a manner of radiation heat exchange, and includes, but is not limited to, a direct abutting or welding fixed connection between the two, or other connection manners known in the art capable of implementing heat conduction, so that the conductive connection between the first heat exchange fin 30 and the second flat tube 82 may be a direct connection or a spacing arrangement, and the connection manner may be flexibly set according to actual requirements (for example, a requirement of heat conduction efficiency), which is not described herein.

Specifically, the second heat exchange assembly 2 includes a plurality of second heat exchange fins, the second heat exchange fins are disposed between two adjacent second flat tubes 82 and are conductively connected to at least one of the two adjacent second flat tubes 82, and the extension portion of the first heat exchange fin 30 is conductively connected to at least one of the two adjacent second flat tubes 82 through the second heat exchange fins. The arrangement makes the second heat exchange fin convenient for processing and forming and subsequent welding and installation.

Optionally, the first heat exchange fin 30 comprises a first fixing fin 37 and a first extending fin 38, the first fixing fin 37 is arranged flush with at least one of two adjacent first flat tubes 20 in conductive connection along the width direction of the first flat tubes 20, the first extending fin 38 extends out of the two adjacent first flat tubes 20, one end of the first extending fin 38 is in conductive connection with the first fixing fin 37, and the other end is in conductive connection with the second heat exchange fin, and/or the second heat exchange fin comprises a second fixing fin and a second extending fin, the second fixing fin is arranged flush with at least one of two adjacent second flat tubes 82 in conductive connection along the width direction of the second flat tubes 82, the second extending fin extends out of the two adjacent second flat tubes 82, one end of the second extending fin is in conductive connection with the second fixing fin, and the other end of the second extending fin is in conductive connection with the first heat exchange fin 30.

As shown in fig. 6 and 8, the first heat exchange fin 30 comprises a first fixed fin 37 and a first protruding fin 38, one end of the first protruding fin 38 is connected with the first fixed fin 37, the other end is connected with the second heat exchange assembly 2, the first fixed fin 37 and the first protruding fin 38 are all wavy fins which are arranged in a wavy manner, the wavy fins have a length direction, a width direction and a height direction which are perpendicular to each other, the wavy fins have a front face 31 and a rear face 32 which are arranged correspondingly in the length direction, the wavy fins have an upper face 33 and a right face 34 which are arranged correspondingly in the width direction, the wavy fins have an upper face 35 and a lower face 36 which are arranged correspondingly in the height direction, one face 31 of the front face 31 and one face 32 of the first protruding fin 38 protrude between the two first flat tubes 20, the other face is connected with the front face 31 or the rear face 32 of the first fixed fin 37, the projection of the wavy fins in a plane formed by the height direction and the width direction is in a wavy manner and the wavy waves extend to be parallel to the length direction, and the width direction of the wavy waves formed by the width direction of the first fixed fin 37 are flush with the width direction of the first protruding fin 38.

Through setting up the width direction of first fixed fin 37 and the width direction that first stretches out fin 38 have the contained angle for first fixed fin 37 interweaves under the angle of fig. 6 with first stretching out fin 38 and forms the convection heat transfer network, and then has further improved convection heat transfer efficiency, is favorable to improving heat transfer efficiency.

In one embodiment of the present utility model, the areas of the upper surface 35 and the lower surface 36 are not smaller than the areas of the left surface 33 and the right surface 34, the areas of the left surface 33 and the right surface 34 are not smaller than the areas of the front surface 31 and the rear surface 32, and the left surface 33 and the right surface 34 of the first extending fin 38 are fixedly connected with the outer walls of the adjacent two first flat tubes 20 respectively through welding.

As shown in fig. 6 and 8, the width direction of the first fixing fins 37 is perpendicular to the width direction of the first protruding fins 38, the plurality of fixing heat exchange columns 41 are formed by taking the plurality of first fixing fins 37 positioned between two adjacent first flat tubes 20 as one fixing heat exchange column 41, the upper faces 35 and the lower faces 36 of the plurality of first fixing fins 37 positioned in the same fixing heat exchange column 41 are respectively coplanar, the plurality of protruding heat exchange columns 42 are formed by taking the plurality of first protruding fins 38 positioned between two adjacent first flat tubes 20 as one protruding heat exchange column 42, the plurality of first protruding fins 38 positioned in the same protruding heat exchange column 42 are equidistantly arranged along the extending direction of the first flat tubes 20, the upper faces 35 and the lower faces 36 of the plurality of first protruding fins 38 are respectively parallel, the height direction of the first protruding fins 38 are respectively parallel to the extending direction of the first flat tubes 20, and the front faces 31 or the rear faces 32 of the first protruding fins 38 are conductively connected with the second heat exchange fins in the length direction. In this way, the number of the first fixing fins 37 and the first protruding fins 38 is increased as much as possible in the limited space, thereby maximizing the efficiency of convection and contact heat exchange.

Specifically, the second heat exchange assembly 2 comprises a second collecting pipe group, wherein the second collecting pipe group comprises two second collecting pipes 81 arranged at intervals, a plurality of second flat pipes 82, the second flat pipes 82 are arranged at intervals along the axial direction of the second collecting pipes 81, two ends of each second flat pipe 82 are respectively communicated with the two second collecting pipes 81 of the second collecting pipe group, at least the part, extending out of the space between two adjacent first flat pipes 20, of each first heat exchange fin 30 is arranged between the two adjacent second flat pipes 82, the second heat exchange assembly 2 further comprises second heat exchange fins, each second heat exchange fin is arranged between the two adjacent second flat pipes 82, and each second heat exchange fin is arranged in a split mode with the corresponding first extending fin 38.

Through setting up second heat transfer fin and the integrative setting of first fin 38 that stretches out, both realized the reliable connection and the fixed between first heat exchange component 1 and the second heat exchange component 2, make second heat transfer fin and first fin 38 that stretches out be convenient for machine-shaping and welding installation again.

As shown in fig. 1, the second heat exchange assembly 2 comprises a second collecting pipe group, a plurality of second flat pipes 82 and a plurality of second flat pipes 82, wherein the second collecting pipe group comprises two second collecting pipes 81 which are arranged at intervals, the second flat pipes 82 are arranged at intervals along the axial direction of the second collecting pipe 81, two ends of each second flat pipe 82 are respectively communicated with the two second collecting pipes 81 of the second collecting pipe group, and the parts, extending out of the space between the adjacent two first flat pipes 20, of the first heat exchange fins 30 are arranged between the adjacent two second flat pipes 82. By the arrangement, the contact heat exchange efficiency and the convection heat exchange efficiency between the first heat exchange assembly 1 and the second heat exchange assembly 2 are improved.

Specifically, the first collecting pipe 10 and the second collecting pipe 81 are arranged at intervals in parallel, wherein a plurality of first flat pipes 20 and a plurality of second flat pipes 82 are arranged at intervals in parallel in a one-to-one correspondence manner, the space between the first flat pipes 20 and the second flat pipes 82 is WCP, the width of the first flat pipes 20 is W1 and is 0.8W1W 1 or less than or equal to WCP or less than or equal to 0.8W1, and/or the first collecting pipe 10 and the second collecting pipe 81 are arranged at intervals in parallel, the plurality of first flat pipes 20 and the plurality of second flat pipes 82 are arranged at intervals in parallel in a one-to-one correspondence manner, the space between the first flat pipes 20 and the second flat pipes 82 is WCP, the width of the second flat pipes 82 is W2 and is 0.8W2 or less than or equal to WCP or less than or equal to 5W2. By the arrangement, heat loss can be effectively avoided, and the overall heat exchange efficiency of the heat exchanger is improved. The widths of the first flat tube 20 and the second flat tube 82 can be equal or unequal, and when the widths of the first flat tube 20 and the second flat tube 82 can effectively adjust the heat recovery quantity between the first heat exchange component 1 and the second heat exchange component 2, the widths of the first flat tube 20 and the second flat tube 82 are equal, so that the overall structure layout of the heat exchanger is convenient.

It should be noted that, the distance between the first flat tube 20 and the second flat tube 82 is between 5mm and 100mm, and the distance between the first flat tube 20 and the second flat tube 82 is set to effectively avoid the excessive resistance of the middle air convection of the first heat exchange component 1 and the second heat exchange component 2, the first flat tube 20 and the second flat tube 82 directly need to have a gap, if the gap is too small, the air convection resistance is large, and if the gap is too large, the heat conduction effect is poor, so that the effect balance needs to be found by setting the distance between the first flat tube 20 and the second flat tube 82.

Optionally, a plurality of first slots penetrating the peripheral wall of the first header 10 in the wall thickness direction of the first header 10 are formed in the peripheral wall of the first header 10, the width direction of each first slot is parallel to the axial direction of the first header 10, the plurality of first slots are arranged at intervals along the axial direction of the first header 10, the distance between adjacent first slots in the axial direction of the first header 10 is greater than four times the width of the first slots, and/or a plurality of second slots penetrating the peripheral wall of the second header 81 in the wall thickness direction of the second header 81 are formed in the peripheral wall of the second header 81, the width direction of each second slot is parallel to the axial direction of the second header 81, the plurality of second slots are arranged at intervals along the axial direction of the second header 81, and the distance between adjacent second slots in the axial direction of the second header 81 is greater than four times the width of the second slots.

It should be noted that, considering the convenience of processing, the distance between two slots (for example, two first slots or two second slots) is preferably above 6.5mm, so as to ensure the pressure resistance of the overall structure of the heat exchanger.

As shown in fig. 1, the first flat tube 20 is communicated with two first collecting pipes 10 to form a first passage, the second flat tube 82 is communicated with two second collecting pipes 81 to form a second passage, and the first passage and the second passage are respectively used for circulating two liquids with different temperatures.

In one embodiment of the present utility model, the projection along the extending direction of the first flat tube 20 has a superposition portion of the projection of the first header 10 and the projection of the second header 81. The arrangement is that the distance between the first collecting pipe 10 and the second collecting pipe 81 is maximally reduced on the premise that the first collecting pipe 10 and the second collecting pipe 81 are arranged at intervals, so that the efficiency of radiation heat exchange and convection heat exchange is improved to a certain extent, the whole structure of the heat exchanger is compact, and the space is saved.

In another embodiment of the present utility model, the first heat exchange fin 30 is a wave fin, the wave fin has a length direction, a width direction and a height direction perpendicular to each other, the dimension of the first flat tube 20 in the length direction is equal to or greater than the diameter of the first collecting pipe 10, and the dimension of the second flat tube 82 in the length direction is equal to or greater than the diameter of the second collecting pipe 81. By the arrangement, the contact areas of the first flat tube 20 and the second flat tube 82 and the left surface and the right surface of the wavy fins are increased, and then the contact heat exchange efficiency is increased.

As shown in fig. 2 and 8, the first heat exchange fin 30 is fixedly connected with a condenser 80 in an external air conditioning system in a brazing manner, the first heat exchange fin 30 is a wave-shaped fin, the wave-shaped fin has a longitudinal direction, a width direction and a height direction which are perpendicular to each other, the wave-shaped fin has a front face 31 and a rear face 32 which are correspondingly arranged in the longitudinal direction, the wave-shaped fin has a left face 33 and a right face 34 which are correspondingly arranged in the width direction, and the wave-shaped fin has an upper face 35 and a lower face 36 which are correspondingly arranged in the height direction, wherein the areas of the upper face 35 and the lower face 36 are not smaller than the areas of the left face 33 and the right face 34, and the areas of the left face 33 and the right face 34 are not smaller than the areas of the front face 31 and the rear face 32. The arrangement ensures that the structure of the first heat exchange fin 30 is simplified and the welding and fixing are convenient, and meanwhile, the plurality of wavy fins work cooperatively, so that the flow direction of air flow can be flexibly set, and the convection heat exchange effect is ensured.

As shown in fig. 1, 2, 3 and 4, the plurality of first heat exchange fins 30 located between two adjacent first flat tubes 20 are used as a heat exchange column to form a plurality of heat exchange columns, the plurality of first heat exchange fins 30 located in the same heat exchange column are equidistantly arranged along the extending direction of the first flat tubes 20 at intervals, the upper faces 35 and the lower faces 36 of the plurality of first heat exchange fins 30 are respectively parallel, the left faces 33 and the right faces 34 of the first heat exchange fins 30 are respectively fixedly connected with the outer walls of the two adjacent first flat tubes 20 in a welding mode, the height direction is parallel to the extending direction of the first flat tubes 20, and a part of the first heat exchange fins 30 extend out of gaps between the two adjacent first flat tubes 20 along the length direction in the length direction for being fixedly connected with the second heat exchange assembly 2. This arrangement ensures the contact heat exchange and convection heat exchange effects of the first heat exchange fins 30.

It should be noted that, in the first embodiment of the present utility model, the second heat exchange assembly 2 itself also has fins, as shown in fig. 3, the first heat exchange assembly 1 and the second heat exchange assembly 2 in the first embodiment have the same fin size and arrangement direction, and the wind side resistance coefficient is small and the wind side pressure drop is better.

In addition, it should be noted that in the second embodiment of the present utility model, as shown in fig. 4, the fins of the first heat exchange assembly 1 have the same direction as the fins of the second heat exchange assembly 2, but have a slightly larger size (for example, the size in the width direction is slightly larger than the size of the fins on the second heat exchange assembly 2), and when the first heat exchange fins 30 of the first heat exchange assembly 1 are welded and fixed with the second flat tubes 82 on the second heat exchange assembly 2, the first heat exchange fins 30 will extend to the ends of the second flat tubes 82 on the second heat exchange assembly 2 (i.e., the end faces of the second flat tubes 82 facing the first heat exchange fins 30 in the length direction), and the arrangement ensures that the first heat exchange fins 30 of the first heat exchange assembly 1 and the second heat exchange assembly 2 perform sufficient contact heat exchange, thereby enhancing the heat exchange effect.

As shown in fig. 1, 2, 3 and 4, the plurality of first flat tubes 20 are equidistantly spaced along the axial direction of the first header 10 so that the plurality of heat exchange columns are equidistantly spaced, and for two adjacent heat exchange columns, the upper faces 35 of the plurality of first heat exchange fins 30 in one heat exchange column are not coplanar with the upper faces 35 of the plurality of first heat exchange fins 30 in the other heat exchange column so as to form a plurality of first heat exchange fins 30 which are staggered in the axial direction of the first header 10. By arranging the plurality of first heat exchange fins 30 which are staggered in the axial direction of the first collecting pipe 10, airflow can generate bypass (instead of advection) when passing between the plurality of first heat exchange fins 30, and therefore the convective heat exchange effect is improved.

Optionally, as shown in fig. 5 and 6, at least a part of the first heat exchange fins 30 are parallel to the extending direction of the first flat tubes 20, and a part of the first heat exchange fins 30 extends out of the gap between two adjacent first flat tubes 20 along the length direction for fixedly connecting with the second heat exchange assembly 2 in the external air conditioning system. Unlike the heat exchangers shown in fig. 1, 2, 3 and 4, the arrangement direction of at least a part of the first heat exchange fins 30 is changed, so that the flow direction and the effective heat exchange area when the air flow passes through the plurality of first heat exchange fins 30 are changed, and the convection heat exchange effect is ensured to the maximum extent.

It should be noted that, in the first embodiment and the second embodiment of the present utility model, the height direction of the first heat exchange fin 30 is parallel to the extending direction of the first flat tube 20, and the width direction of the first heat exchange fin 30 in the third embodiment of the present utility model is parallel to the extending direction of the first flat tube 20, and in practical use, the arrangement modes of the first heat exchange fin 30 in the above three embodiments can be flexibly selected in a mixing manner, so as to improve the applicability of the heat exchanger.

As shown in fig. 5 and 6, a part of the first heat exchange fins 30 among the plurality of first heat exchange fins 30 located between two adjacent first flat tubes 20 form one heat exchange column, the plurality of first heat exchange fins 30 in the heat exchange column are arranged at equal intervals along the extending direction of the first flat tubes 20, and the upper faces 35 and the lower faces 36 of the plurality of first heat exchange fins 30 in the heat exchange column are respectively arranged in a coplanar manner. This arrangement ensures the heat exchanging effect of the first heat exchanging fin 30 in the third embodiment.

As shown in fig. 6, at least two heat exchange columns are arranged between two adjacent first flat tubes 20, and a plurality of heat exchange columns are arranged in parallel. By this arrangement, the effective heat exchange area of the first heat exchange fin 30 is further increased.

It should be noted that, in an embodiment of the present utility model, one heat exchange column may be formed by bending or bending the same plate, and at this time, two adjacent first heat exchange fins 30 in one heat exchange column have a connection relationship, so as to ensure the firmness of the first heat exchange fins 30.

Specifically, the first flat tube 20 and the second flat tube 82 have a circulation channel for accommodating and circulating a heat exchange medium therein, the circulation channel is communicated with the first collecting pipe 10, and the equivalent diameter of the circulation channel ranges from 10 μm to 1000 μm, so that the heat exchanger is a micro-channel heat exchanger. The heat exchanger is a micro-channel heat exchanger, so that the heat exchanger is convenient to miniaturize and integrate.

The equivalent diameter in the present utility model is not limited to the cross-sectional shape of the flow channel, and the cross-sectional shape of the flow channel may be circular or may be any other shape. For example, a rectangular shape, etc., the equivalent diameter is limited only to the volume of liquid flowing through the flow channel per unit time, and for example, when the flow channel has a rectangular cross-sectional shape, the volume of liquid flowing through the flow channel per unit time falls within the volume of liquid flowing through the flow channel per unit time when the flow channel has a circular cross-sectional shape and the circular diameter is within the range of 10 to 1000 μm.

As shown in fig. 1, 2 and 5, the first flat tube 20 has a flow channel therein for receiving and circulating a heat exchange medium, one of the first headers 10 serves as an inlet for the heat exchange medium, the other of the first headers 10 serves as an outlet for the heat exchange medium, the plurality of first flat tubes 20 are arranged in an axial direction of the first headers 10 to form a flat tube group, and the heat exchanger further includes at least two protection side plates 50, wherein one protection side plate 50 is disposed on the first flat tube 20 at one end of the flat tube group, and the other protection side plate 50 is disposed on the first flat tube 20 at the other end of the flat tube group to protect the first flat tube 20. By arranging the protection side plate 50, the first flat tube 20 is effectively protected, and the working reliability of the heat exchanger is further improved.

It should be noted that, in an embodiment of the present utility model, the protection edge plate 50 may be formed by machining the first flat tubes 20, and the two first flat tubes 20 located at the outermost ends of the flat tube groups are not connected to the first collecting pipe 10, so that the two first flat tubes 20 may be regarded as two protection edge plates 50 to protect the inner first flat tubes 20.

As shown in FIG. 7, the utility model further provides a waste heat recovery system, which comprises the heat exchanger, the waste heat recovery system further comprises an air conditioning system and a heat recovery device, the air conditioning system comprises a compressor 60, an evaporator 70, a throttling device 3 and a first heat exchange component 1, the compressor 60, the evaporator 70, the throttling device 3 and the first heat exchange component 1 are sequentially communicated through pipelines to form a refrigerant circulation pipeline, the refrigerant circulates in the refrigerant circulation pipeline, the first heat exchange component 1 serves as a condenser 80, the heat recovery device comprises a second heat exchange component 2, first heat exchange fins 30 on the first heat exchange component 1 are fixedly connected with the second heat exchange component 2 in a welding mode, and the second heat exchange component 2 collects part of heat emitted by the first heat exchange component 1 in the air and transmits the part of heat to a heat exchange medium in the second heat exchange component 2. By the arrangement, the high-efficiency heat utilization of the waste heat recovery system is realized.

As shown in fig. 7, the waste heat recovery system further comprises a water tank 90, a circulating pump and a fan, wherein the fan drives air to flow through the heat exchanger to perform convection heat exchange, the water tank 90, the circulating pump and the second heat exchange assembly 2 are sequentially communicated through pipelines to form a heat exchange medium circulating pipeline, the circulating pump is used for driving heat exchange medium in the heat exchange medium circulating pipeline to flow, and the heat exchange medium in the heat exchange medium circulating pipeline conveys collected heat into the water tank 90 for storage. By the arrangement, structural support is provided for a subsequent waste heat recovery system to provide hot water for users.

In one embodiment of the present utility model, water is circulated in the heat exchange medium circulation line of the heat recovery device, that is, water is used as the heat exchange medium at this time, and a refrigerant circulation line in the air conditioning system circulates a conventional refrigerant.

In one embodiment of the present utility model, the tank 90 is coated with the energy storage material or the tank 90 is formed by processing the energy storage material, so that the energy-saving and heat-insulating properties of the tank 90 are better. The energy storage material comprises an organic phase change material, an inorganic phase change material and a mixed phase change material used by mixing the organic phase change material and the inorganic phase change material, and can be flexibly selected according to the use environment, the use place and the client requirement.

The heat pump type air conditioning system is characterized in that the refrigerant in the heat pump type air conditioning system can be discharged from a condenser 80, heat is brought into a room by blowing hot air of a fan to achieve the purpose of indoor heat supply, but in the process, part of the heat of the condenser 80 is accumulated and cannot be timely carried away by blowing heat exchange, the heat exchanger provided by the utility model is characterized in that the condenser 80 is provided with a plurality of first heat exchange fins 30 which are welded with a second heat exchange assembly 2 through a brazing process, so that the effective recovery of redundant heat in the heat pump type air conditioning system is realized, the recovered heat can heat flowing working medium water and be stored in a water tank 90, and subsequent clients can select different use modes according to different use requirements, such as direct use, common heat preservation, combined use of an electric water heater or a gas water heater, and the like.

In one embodiment of the present utility model, the modes of the waste heat recovery system for external hot water supply and energy storage can be classified into the following three modes:

A. When the waste heat recovery system is applied to places such as markets, companies, hotels and the like with large flow and more hot water, and the use time period of the hot water is the same as that of the heat pump air conditioning system, the hot water in the water tank 90 can be set into a hot water supply mode of 'taking and using at once';

B. When the waste heat recovery system is used in places with fewer people and more hot water is produced by the system, the water tank 90 can be set as a common heat preservation water storage device (namely, the water tank 90 without energy storage materials) to store hot water, and the water tank is reused when the user needs to use the water tank;

C. The hot water is stored using the energy storage material coated water tank 90 or directly by absorbing heat with the energy storage material to facilitate long term storage of energy.

The three schemes can be combined with the electric/gas water heater for use, namely when the temperature of the hot water in the water tank 90 does not reach the use requirement of a user, the electric/gas water heater carries out heating treatment on the hot water and provides the hot water for the user for use, and through the arrangement, the waste heat recovery system effectively meets different use requirements.

In summary, the utility model provides a heat exchanger and a waste heat recovery system, wherein the heat exchanger is provided with the first heat exchange fins 30 arranged between two adjacent first flat pipes 20, and one part of the first heat exchange fins 30 extends out of a gap between two adjacent first flat pipes 20, so that the first heat exchange component 1 and the second heat exchange component 2 in the heat exchanger can be directly connected through the first heat exchange fins 30 for contact heat exchange, the air can flow through the gaps between the plurality of first heat exchange fins 30 for convection heat exchange through the arrangement of the plurality of first heat exchange fins 30 at intervals, the second heat exchange component 2 can effectively collect diffuse heat in the air, the heat exchange efficiency of the heat exchanger is higher through the cooperation of the two heat exchange modes of convection heat exchange and contact heat exchange, the whole heat exchange effect is good, the actual use requirement is effectively met, the heat exchanger provided by the utility model can be effectively applied to the heat recovery of the condenser 80 on a cold heat pump, the heat exchanger can be applied to a waste heat supply system, the heat exchanger can be applied to the heat exchanger, the heat exchanger can be fully utilized, the heat exchanger 80 can be supplied by the heat exchanger, the heat exchanger can be fully utilized, the heat exchanger can be fully supplied by the heat exchanger 80, the heat exchanger can be fully has the energy saving effect, and energy can be fully saved, the heat can be fully supplied by the heat exchanger, and the heat can be fully consumed by the heat exchanger 80, and the heat can be fully consumed by the heat exchanger, and has the heat energy is reduced by heat energy. It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present utility model. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In the description of the present utility model, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, and are merely for convenience of describing the present utility model and simplifying the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of the present utility model, and the azimuth terms "inside and outside" refer to inside and outside with respect to the outline of each component itself.

Spatially relative terms, such as "above," "upper" and "upper surface," "above" and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the process is carried out, the exemplary term "above" may be included. Upper and lower. Two orientations below. The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present utility model.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (12)

1. A heat exchanger, comprising:

The heat exchange device comprises a first heat exchange assembly (1), a plurality of first flat tubes (20), a plurality of first heat exchange assemblies (1), a plurality of second heat exchange assemblies (1), a plurality of first heat exchange assemblies, a plurality of second heat exchange assemblies (2), a plurality of first heat exchange assemblies (1), a plurality of second heat exchange assemblies (20) and a plurality of heat exchange assemblies, wherein the first heat exchange assemblies comprise first collector tube groups, the first collector tube groups comprise two first collector tubes (10) which are arranged at intervals, the first flat tubes (20) are arranged at intervals along the axial direction of the first collector tubes (10), and two ends of each first flat tube (20) are respectively communicated with the two first collector tubes (10) of each first collector tube group;

The second heat exchange assembly (2) comprises a second collecting pipe group, a plurality of second flat pipes (82) and a plurality of heat exchange units, wherein the second collecting pipe group comprises two second collecting pipes (81) which are arranged at intervals, the second flat pipes (82) are arranged at intervals along the axial direction of the second collecting pipes (81), two ends of each second flat pipe (82) are respectively communicated with the two second collecting pipes (81) of the second collecting pipe group, and the second heat exchange assembly (2) and the first heat exchange assembly (1) are arranged in parallel along the width direction of the first flat pipes (20);

The first heat exchange assembly (1) comprises a plurality of first heat exchange fins (30), wherein the first heat exchange fins (30) are arranged between two adjacent first flat tubes (20) and are in conductive connection with at least one of the two adjacent first flat tubes (20), the first heat exchange fins (30) extend out of the two adjacent first flat tubes (20) along the width direction of the first flat tubes (20), and the extending parts of the first heat exchange fins (30) are in conductive connection with at least one of the two adjacent second flat tubes (82).

2. The heat exchanger according to claim 1, wherein the second heat exchange assembly (2) comprises a plurality of second heat exchange fins arranged between and in conductive connection with at least one of the adjacent two second flat tubes (82), the protruding portion of the first heat exchange fin (30) being in conductive connection with at least one of the adjacent two second flat tubes (82) through the second heat exchange fins.

3. The heat exchanger according to claim 2, wherein the first heat exchange fin (30) includes a first fixing fin (37) and a first protruding fin (38), the first fixing fin (37) is disposed flush with at least one of the two adjacent first flat tubes (20) connected by conduction along a width direction of the first flat tubes (20), the first protruding fin (38) is disposed protruding from the two adjacent first flat tubes (20), one end of the first protruding fin (38) is conductively connected to the first fixing fin (37), the other end is conductively connected to the second heat exchange fin, and/or the second heat exchange fin includes a second fixing fin and a second protruding fin, the second fixing fin is disposed flush with at least one of the two adjacent second flat tubes (82) connected by conduction along a width direction of the second flat tubes (82), the second protruding fin is disposed protruding from the two adjacent second flat tubes (82), and the second protruding fin is connected by flush with the second heat exchange fin (30).

4. A heat exchanger according to claim 3, wherein the first fixing fins (37) and the first projecting fins (38) are each wave-like fins extending in a wave shape, the wave-like fins having a longitudinal direction, a width direction and a height direction perpendicular to each other, the wave-like fins having a front face (31) and a rear face (32) disposed correspondingly in the longitudinal direction, the wave-like fins having a left face (33) and a right face (34) disposed correspondingly in the width direction, the wave-like fins having an upper face (35) and a lower face (36) disposed correspondingly in the height direction, wherein one face of the front face (31) and the rear face (32) of the first projecting fins (38) projects between the two first flat tubes (20), the other face of the wave-like fins is connected to the front face (31) or the rear face (32) of the first fixing fins (37), the wave-like fins are projected in a plane formed correspondingly in the height direction and the width direction, and the wave-like fins extend in a wave shape to be flush with the width direction of the first projecting fins (37) and have an angle with the width direction of the first projecting fins.

5. The heat exchanger according to claim 4, wherein the width direction of the first fixing fin (37) is perpendicular to the width direction of the first projecting fin (38);

a plurality of first fixing fins (37) positioned between two adjacent first flat tubes (20) are taken as a fixed heat exchange column (41) to form a plurality of fixed heat exchange columns (41); the upper surface (35) and the lower surface (36) of a plurality of first fixing fins (37) positioned on the same fixed heat exchange column (41) are respectively coplanar;

A plurality of first extending fins (38) between two adjacent first flat tubes (20) are used as an extending heat exchange column (42) to form a plurality of extending heat exchange columns (42), the plurality of first extending fins (38) located in the same extending heat exchange column (42) are arranged at equal intervals along the extending direction of the first flat tubes (20), the upper surfaces (35) and the lower surfaces (36) of the plurality of first extending fins (38) are respectively parallel, the height direction of the first extending fins (38) is parallel to the extending direction of the first flat tubes (20), and the front surfaces (31) or the rear surfaces (32) of the first extending fins (38) are connected with the second heat exchange fins in a conducting mode in the length direction.

6. The heat exchanger according to claim 1, wherein the portion of the first heat exchange fin (30) extending between two adjacent ones of the first flat tubes (20) is disposed between two adjacent ones of the second flat tubes (82).

7. The heat exchanger according to any one of claims 1 to 5, wherein the first collecting pipe (10) and the second collecting pipe (81) are arranged at intervals in parallel, wherein a plurality of the first flat pipes (20) and a plurality of the second flat pipes (82) are arranged at intervals side by side in a one-to-one correspondence, the interval between the first flat pipes (20) and the second flat pipes (82) is WCP, the width of the first flat pipes (20) is W1 and satisfies 0.8W1W 1 less than or equal to WCP, and/or the first collecting pipe (10) and the second collecting pipe (81) are arranged at intervals in parallel, wherein a plurality of the first flat pipes (20) and a plurality of the second flat pipes (82) are arranged at intervals side by side in a one-to-one correspondence, the interval between the first flat pipes (20) and the second flat pipes (82) is WCP, the width of the second flat pipes (82) is W2 and satisfies 0.8W2W 2 less than or equal to WCP 5 less than or equal to WCP.

8. The heat exchanger according to any one of claims 1 to 5, wherein a plurality of first slots penetrating the peripheral wall of the first header (10) in the wall thickness direction of the first header (10) are provided in the peripheral wall of the first header (10), the width direction of each of the first slots is parallel to the axial direction of the first header (10) and the plurality of first slots are arranged at intervals in the axial direction of the first header (10), the distance between adjacent first slots in the axial direction of the first header (10) is greater than four times the width of the first slots, and/or a plurality of second slots penetrating the peripheral wall of the second header (81) in the wall thickness direction of the second header (81) are provided in the peripheral wall of the second header (81), the width direction of each of the second slots is parallel to the axial direction of the second header (81) and the plurality of second slots are arranged at intervals in the axial direction of the second header (81), and the distance between adjacent second slots in the axial direction of the second header (81) is greater than four times the width of the second slots in the axial direction of the second header (81).

9. The heat exchanger according to any one of claims 1 to 5, wherein the first flat tube (20) communicates with two of the first headers (10) to form a first passage, and the second flat tube (82) communicates with two of the second headers (81) to form a second passage, the first and second passages being respectively for circulating two liquids of different temperatures.

10. A waste heat recovery system is characterized by comprising a heat exchanger according to any one of claims 1 to 9, the waste heat recovery system further comprises an air conditioning system and a heat recovery device, the air conditioning system comprises a compressor (60), an evaporator (70), a throttling device (3) and a first heat exchange component (1), the compressor (60), the evaporator (70), the throttling device (3) and the first heat exchange component (1) are sequentially communicated through pipelines to form a refrigerant circulation pipeline, the first heat exchange component (1) serves as a condenser (80), the heat recovery device comprises a second heat exchange component (2), the first heat exchange fins (30) on the first heat exchange component (1) are fixedly connected with the second heat exchange component (2) in a welding mode, and the second heat exchange component (2) collects part of heat emitted in air by the first heat exchange component (1) and transmits the part of heat to a heat exchange medium in the second heat exchange component (2).

11. The waste heat recovery system according to claim 10, further comprising a water tank (90), a circulating pump and a fan, wherein the fan drives air to flow through the heat exchanger to perform convection heat exchange, the water tank (90), the circulating pump and the second heat exchange assembly (2) are sequentially communicated through pipelines to form a heat exchange medium circulating pipeline, the circulating pump is used for driving the heat exchange medium in the heat exchange medium circulating pipeline to flow, and the heat exchange medium in the heat exchange medium circulating pipeline is used for conveying collected heat into the water tank (90) for storage.

12. The waste heat recovery system of claim 11, wherein the refrigerant circulation line is disposed in a reverse direction of the internal flow path of the heat exchange medium circulation line.