Heat exchanger and air conditioning system

Abstract

The application relates to a heat exchanger and an air conditioning system. The heat exchanger comprises: a first heat exchanger comprising a first pipe, a second pipe and a plurality of first heat exchange pipes, the first heat exchange pipes being connected to the first pipe and the second pipe, the first pipe, the second pipe and the plurality of first heat exchange pipes forming a heat exchange medium flow path of the first heat exchanger; a second heat exchanger comprising a third pipe, a fourth pipe and a plurality of second heat exchange pipes, the second heat exchange pipes being connected to the third pipe and the fourth pipe, the third pipe, the fourth pipe and the plurality of second heat exchange pipes forming a heat exchange medium flow path of the second heat exchanger; the heat exchange medium flow path of the first heat exchanger being connected to the heat exchange medium flow path of the second heat exchanger; a first plane being defined as a plane passing through the axis of the first pipe and the axis of the second pipe, a second plane being defined as a plane passing through the axis of the third pipe and the axis of the fourth pipe, the included angle between the first plane and the second plane being greater than or equal to 85 degrees and less than or equal to 100 degrees. The heat exchanger has good frost performance.

Description

Technical Field

[0001] This application relates to the field of heat exchange technology, and more particularly to a heat exchanger and air conditioning system. Background Technology

[0002] When distributing refrigerant to heat exchangers with two or more rows, the related distribution technology suffers from poor uniformity due to the large number of flat tubes, their long length, and the non-unidirectional flow of refrigerant within them. Furthermore, the more rows there are and the greater the outlet superheat, the more difficult the distribution adjustment becomes. During frosting conditions, frost gradually extends from the refrigerant inlet area along the refrigerant flow direction. Therefore, the row of heat exchangers at the inlet has the most frost, while the row at the outlet has the least. The amount of frost varies significantly across each row, which is detrimental to improving frosting performance. Summary of the Invention

[0003] A first aspect of this application provides a heat exchanger, the heat exchanger comprising:

[0004] The first heat exchanger includes a first tube, a second tube, and a plurality of first heat exchange tubes. The first heat exchange tubes connect the first tube and the second tube, and the first tube, the second tube, and the plurality of first heat exchange tubes form a heat exchange medium flow path for the first heat exchanger.

[0005] The second heat exchanger includes a third tube, a fourth tube, and a plurality of second heat exchange tubes. The second heat exchange tubes are connected to the third tube and the fourth tube. The third tube, the fourth tube, and the plurality of second heat exchange tubes form the heat exchange medium flow path of the second heat exchanger.

[0006] The heat exchange medium flow path of the first heat exchanger is connected to the heat exchange medium flow path of the second heat exchanger;

[0007] The plane that passes through the axis of the first tube and the axis of the second tube simultaneously is defined as the first plane, and the plane that passes through the axis of the third tube and the axis of the fourth tube simultaneously is defined as the second plane. The angle formed by the first plane and the second plane is greater than or equal to 85° and less than or equal to 100°.

[0008] In one alternative embodiment, the axes of the first tube and the second tube are horizontal, and the axes of the third tube and the fourth tube are vertical.

[0009] In one alternative embodiment, the second heat exchanger includes a first heat exchange section and a second heat exchange section along the axial direction of the third tube, and the heat exchange medium flow path of the first heat exchange section and the heat exchange medium flow path of the second heat exchange section are connected through the heat exchange medium flow path of the first heat exchanger.

[0010] In one alternative embodiment, the second heat exchanger is provided with a heat exchange medium inlet and a heat exchange medium outlet, wherein the heat exchange medium inlet is located in the first heat exchange section and the heat exchange medium outlet is located in the second heat exchange section.

[0011] Alternatively, the heat exchange medium inlet may be located in the second heat exchange section, and the heat exchange medium outlet may be located in the first heat exchange section;

[0012] The second heat exchanger is located on the windward side of the heat exchanger.

[0013] In one alternative embodiment, a first baffle is provided inside the third pipe, which divides the third pipe into a first pipe segment and a second pipe segment; a second baffle is provided inside the fourth pipe, which divides the fourth pipe into a third pipe segment and a fourth pipe segment.

[0014] The first heat exchange section includes a first pipe segment, a third pipe segment, and a portion of the second heat exchange tube, with the portion of the second heat exchange tube located between the first pipe segment and the third pipe segment. The second heat exchange section includes a second pipe segment, a fourth pipe segment, and a portion of the second heat exchange tube, with the portion of the second heat exchange tube located between the second pipe segment and the fourth pipe segment.

[0015] In one alternative embodiment, the first tube is provided with a heat exchange medium inlet, and a gas-liquid separation tube is provided inside the first tube. The gas-liquid separation tube has a first end and a second end along its length. There is a gap between the first end of the gas-liquid separation tube and the heat exchange medium inlet, and the second end of the gas-liquid separation tube is connected to the heat exchange medium flow path of the second heat exchanger.

[0016] In one alternative embodiment, the second heat exchanger includes at least a third heat exchange section and a fourth heat exchange section, wherein the heat exchange medium flow path of the third heat exchange section is connected to the heat exchange medium flow path of the fourth heat exchange section.

[0017] The second end of the gas-liquid separator and the heat exchange medium flow path of the first heat exchanger are respectively connected to the heat exchange medium flow path of the third heat exchange section, and the fourth heat exchange section is provided with a heat exchange medium outlet.

[0018] The heat exchanger includes a first flow path for a gaseous heat exchange medium and a second flow path for a liquid heat exchange medium. The first flow path includes at least the heat exchange medium flow path of the third heat exchange section and the heat exchange medium flow path of the fourth heat exchange section. The second flow path includes at least the heat exchange medium flow path of the first heat exchanger, the heat exchange medium flow path of the third heat exchange section, and the heat exchange medium flow path of the fourth heat exchange section.

[0019] In one alternative embodiment, the fourth heat exchange section is located above the third heat exchange section.

[0020] In one alternative embodiment, the second heat exchanger further includes a fifth heat exchange section located between the third heat exchange section and the fourth heat exchange section, wherein the heat exchange medium flow path of the fifth heat exchange section is connected in series with the coolant flow path of the third heat exchange section and the coolant flow path of the fourth heat exchange section.

[0021] The first flow path includes the heat exchange medium flow path of the third heat exchange section, the heat exchange medium flow path of the fifth heat exchange section, and the heat exchange medium flow path of the fourth heat exchange section. The second flow path includes the heat exchange medium flow path of the first heat exchanger, the heat exchange medium flow path of the third heat exchange section, the heat exchange medium flow path of the fifth heat exchange section, and the heat exchange medium flow path of the fourth heat exchange section.

[0022] In one alternative embodiment, a third baffle is provided inside the third pipe, which divides the third pipe into a fifth pipe segment and a sixth pipe segment, and a fourth baffle is provided inside the fourth pipe, which divides the fourth pipe into a seventh pipe segment and an eighth pipe segment.

[0023] The third heat exchange section includes the fifth pipe segment, the seventh pipe segment, and a portion of the second heat exchange tube, with the portion of the second heat exchange tube located between the fifth pipe segment and the seventh pipe segment. The fourth heat exchange section includes the sixth pipe segment, the eighth pipe segment, and a portion of the second heat exchange tube, with the portion of the second heat exchange tube located between the sixth pipe segment and the eighth pipe segment.

[0024] In one alternative embodiment, the gas-liquid separator has a through hole on its peripheral wall, and the first end of the gas-liquid separator is closed.

[0025] In one alternative, the first heat exchanger is located on the windward side of the heat exchanger.

[0026] In one alternative embodiment, the second heat exchanger further includes a fifth tube and a sixth tube, with at least a portion of the second heat exchange tube connected to the fifth tube and the sixth tube at both ends along its length.

[0027] In one alternative embodiment, one of the fifth and sixth pipes is provided with an inlet and the other with an outlet, the inlet and the outlet being used to communicate with the flow channel of an external device.

[0028] In one alternative embodiment, the second heat exchanger includes a sixth heat exchange section and a seventh heat exchange section that are bent relative to each other, so that the second heat exchanger has an L-shaped structure. The second heat exchange tube includes a first section and a second section that are bent relative to each other. The sixth heat exchange section includes the fourth tube and the first section, and the seventh heat exchange section includes the third tube and the second section.

[0029] The area of ​​the sixth heat exchange section is larger than that of the seventh heat exchange section, and the first heat exchanger and the sixth heat exchange section are arranged in parallel.

[0030] A second aspect of this application provides an air conditioning system, which includes a compressor, a condenser, a throttling device, and an evaporator, wherein the evaporator is the heat exchanger described above.

[0031] In this embodiment, the heat exchange medium flow path of the first heat exchanger is connected to the heat exchange medium flow path of the second heat exchanger, meaning the heat exchange medium can enter the heat exchange medium flow path of the second heat exchanger from the heat exchange medium flow path of the first heat exchanger, and / or, the heat exchange medium can enter the heat exchange medium flow path of the first heat exchanger from the heat exchange medium flow path of the second heat exchanger. The heat exchanger in this embodiment, because it includes both a first heat exchanger and a second heat exchanger, has the advantages of uniform heat exchange medium distribution and high heat exchange efficiency. Furthermore, the frosting starting points include the connection position between the first heat exchange tube and the inlet manifold of the first heat exchanger and the inlet position of each process of the second heat exchanger, meaning the heat exchanger has a greater number of frosting starting points, thereby improving its frosting performance.

[0032] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit this application. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of the heat exchanger provided in this application in a specific embodiment;

[0034] Figure 2 This is a schematic diagram of the structure of the heat exchanger provided in this application in another specific embodiment;

[0035] Figure 3 for Figure 2 Front view of the second heat exchanger;

[0036] Figure 4 for Figure 3 Sectional view along axis AA;

[0037] Figure 5 This is a schematic diagram of the structure of the heat exchanger provided in this application in yet another specific embodiment;

[0038] Figure 6 for Figure 5 A schematic diagram of the structure of the first heat exchanger in a specific embodiment;

[0039] Figure 7 for Figure 6 A magnified view of part I in the middle;

[0040] Figure 8 for Figure 5A front view of the second heat exchanger in one specific embodiment;

[0041] Figure 9 for Figure 8 BB-direction sectional view;

[0042] Figure 10 for Figure 8 CC-direction sectional view;

[0043] Figure 11 This is a schematic diagram of the structure of the heat exchanger provided in this application in yet another specific embodiment;

[0044] Figure 12 for Figure 11 A schematic diagram of the structure of the second heat exchanger in one specific embodiment;

[0045] Figure 13 This is a schematic diagram of the structure of the heat exchanger provided in this application in yet another specific embodiment.

[0046] Figure label:

[0047] 1-First heat exchanger;

[0048] 11-First tube;

[0049] 12-Second tube;

[0050] 13-First heat exchange tube;

[0051] 14-First fin;

[0052] 15-Gas-liquid separator;

[0053] 151 - Through hole;

[0054] 152 - First end;

[0055] 161 - First connecting pipe;

[0056] 162 - Second connecting pipe;

[0057] 163 - Third connecting pipe;

[0058] 164 - Fourth connecting tube;

[0059] 165 - Fifth connecting tube;

[0060] 166 - Sixth connecting tube;

[0061] 167 - Seventh connecting tube;

[0062] 2-Second heat exchanger;

[0063] 21-Second heat exchange tube;

[0064] 211 - First paragraph;

[0065] 212 - Second paragraph;

[0066] 22-Second fin;

[0067] 23-Third tube;

[0068] 231 - First partition;

[0069] 232 - First Pipe Section;

[0070] 233 - Second Pipe Section;

[0071] 234 - First Exit;

[0072] 235 - First Import;

[0073] 236 - Fifth Pipe Section;

[0074] 237-Sixth Pipe Section;

[0075] 238 - Third partition;

[0076] 239 - Second Import;

[0077] 24 - Fourth tube;

[0078] 241 - Second partition;

[0079] 242 - Third Pipe Section;

[0080] 243-Fourth Pipe Section;

[0081] 244 - Third Import;

[0082] 245 - Seventh Pipe Section;

[0083] 246 - Eighth pipe section;

[0084] 247 - Fourth partition;

[0085] 25 - Fifth tube;

[0086] 26 - Sixth tube;

[0087] 271 - First heat exchange section;

[0088] 272 - Second heat exchange section;

[0089] 273 - Third heat exchange section;

[0090] 274 - Fourth heat exchange section;

[0091] 275 - Sixth heat exchange section;

[0092] 276 - Seventh heat exchange section;

[0093] 277 - Eighth heat exchange section;

[0094] 3-Heat exchange medium inlet;

[0095] 4-Heat exchange medium outlet;

[0096] 5-Fourth import;

[0097] 6-Fourth Exit.

[0098] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. Detailed Implementation

[0099] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0100] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0101] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0102] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0103] It should be noted that the directional terms such as "upper," "lower," "left," and "right" described in the embodiments of this application are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when it is mentioned that an element is connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected to the other element "upper" or "lower" through an intermediate element.

[0104] This application provides a heat exchanger. The technical solution and effects are described using the heat exchanger in an air conditioning system as an example. Of course, the application field of the heat exchanger in this application is not limited to the description herein, and it can also be used in other systems, such as water heaters, automobiles and other systems.

[0105] Depending on the functions they perform, air conditioning systems can be categorized into cooling-only systems and cooling-and-heating systems. Cooling-only systems only provide cooling, while cooling-and-heating systems can provide both cooling and heating. Taking a household air conditioner as an example, when the system is a cooling-and-heating system, it includes components such as a compressor, condenser, evaporator, throttling device, and reversing valve.

[0106] When the air conditioning system is in cooling mode, the outdoor unit acts as the condenser, and the indoor unit acts as the evaporator. The working process in cooling mode mainly includes: the compressor compresses and pressurizes the low-temperature, low-pressure gas from the evaporator into a high-temperature, high-pressure liquid (consuming electrical energy during compression). The high-temperature, high-pressure liquid from the compressor enters the condenser, where it releases heat and liquefies into a medium-temperature, high-pressure liquid (releasing heat to the outside during liquefaction). The medium-temperature, high-pressure liquid from the condenser enters the throttling device, where it is throttled and depressurized into a low-temperature, low-pressure liquid. This low-temperature, low-pressure liquid from the throttling device enters the evaporator, where it absorbs heat and vaporizes into a low-temperature, low-pressure gas. During this heat absorption process, it absorbs heat from the room, thus cooling the room. The low-temperature, low-pressure gas from the evaporator then re-enters the compressor to begin the next cooling cycle.

[0107] When the air conditioning system switches from cooling mode to heating mode, the reversing valve switches the flow direction of the heat exchange medium within the system, causing the outdoor unit to act as an evaporator and the indoor unit as a condenser. The heating mode operation mainly includes: the compressor compresses and pressurizes the low-temperature, low-pressure gas from the evaporator into a high-temperature, high-pressure liquid (consuming electrical energy during compression). The high-temperature, high-pressure liquid from the compressor enters the condenser, where it releases heat and liquefies into a medium-temperature, high-pressure liquid. During liquefaction, it releases heat to the room where the condenser is located, thus heating the room. The medium-temperature, high-pressure liquid from the condenser enters the throttling device, where it is throttled and depressurized into a low-temperature, low-pressure liquid. This low-temperature, low-pressure liquid from the throttling device enters the evaporator, where it absorbs heat and vaporizes into a low-temperature, low-pressure gas (absorbing heat from the outdoor environment where the evaporator is located). The low-temperature, low-pressure gas from the evaporator then re-enters the compressor, starting the next heating cycle.

[0108] Taking the outdoor heat exchanger of this air conditioning system as an example, it functions as a condenser during cooling and as an evaporator during heating. When the outdoor heat exchanger is used as an evaporator, the temperature of the heat exchange medium inside the heat exchanger may be below zero due to the low outdoor ambient temperature. This results in a low surface temperature for the heat exchanger, posing a risk of water vapor in the outside air condensing and frosting on the surface. Frosting can clog the air ducts of the heat exchanger, leading to a decrease in its performance.

[0109] In the aforementioned air conditioning system, the condenser and evaporator can employ the heat exchangers described in the embodiments of this application. These heat exchangers can be microchannel heat exchangers, and include, for example... Figure 1 The first heat exchanger 1 shown is as follows: Figure 1 As shown, the first heat exchanger 1 includes a first tube 11, a second tube 12, a plurality of first heat exchange tubes 13, and a plurality of first fins 14. The first heat exchange tubes 13 are connected to the first tubes 11 and the second tubes 12. The first fins 14 are disposed between adjacent first heat exchange tubes 13, and a duct for gas flow is formed between adjacent first fins 14. The first tubes 11, the second tubes 12, and the plurality of first heat exchange tubes 13 are connected to form a heat exchange medium flow path for the first heat exchanger 1, thereby enabling the gas in the duct to exchange heat with the heat exchange medium in the first heat exchange tubes 13.

[0110] Specifically, the first heat exchange tube 13 can be a flat tube, and multiple flat tubes are arranged in parallel with each other. Of the first tube 11 and the second tube 12, one is an inlet manifold and the other is an outlet manifold. The inlet manifold is used for the heat exchange medium to flow into the first heat exchanger 1 and to distribute the heat exchange medium into the first heat exchange tube 13. The outlet manifold is used to collect the heat exchange medium after heat exchange and to discharge the heat exchange medium from the first heat exchanger 1 through the outlet manifold.

[0111] like Figure 1 As shown, the first heat exchanger 1 has fewer flow paths and lower resistance to the flow of the heat exchange medium, resulting in better uniformity of the heat exchange medium and higher heat exchange efficiency. However, because the cross-sectional area of ​​the first heat exchange tube 13 is smaller than that of the inlet manifold (first tube 11 or second tube 12), there is a higher risk of water vapor condensation and frosting at the inlet of the first heat exchange tube 13. Furthermore, the amount of frosting gradually decreases from the inlet to the outlet of the first heat exchanger 13. Therefore, the amount of frosting on the first heat exchanger 1 is uneven, which is detrimental to subsequent defrosting.

[0112] To improve the uniformity of frosting on the heat exchanger while maintaining high heat exchange efficiency and uniform distribution of the heat exchange medium, the heat exchanger in this embodiment further includes a second heat exchanger 2 arranged in parallel with the first heat exchanger 1. This second heat exchanger 2 can be a microchannel heat exchanger. Figure 1As shown, the second heat exchanger 2 includes a third tube 23, a fourth tube 24, a plurality of second heat exchange tubes 21 and a plurality of second fins 22. The second heat exchange tubes 21 are connected to the third tube 23 and the fourth tube 24. The second fins 22 are located between adjacent second heat exchange tubes 21, and a duct for gas flow is formed between adjacent second fins 22. The third tube 23, the fourth tube 24 and the plurality of second heat exchange tubes 21 are connected to form the heat exchange medium flow path of the second heat exchanger 2.

[0113] Specifically, the second heat exchange tube 21 can be a flat tube, and multiple flat tubes can be arranged in parallel with each other. The third tube 23 and the fourth tube 24 are respectively an inlet manifold and an outlet manifold. The inlet manifold is used for the heat exchange medium to flow into the second heat exchanger 2 and to distribute the heat exchange medium into the second heat exchange tube 21. The outlet manifold is used to collect the heat exchange medium after heat exchange and to discharge the heat exchange medium from the second heat exchanger 2.

[0114] The second heat exchanger 2 comprises multiple processes, with a relatively reduced number of second heat exchange tubes 21 in each process. Furthermore, the refrigerant dryness increases after passing through the first heat exchanger 1, reducing the probability of gas-liquid separation when the refrigerant passes through the second heat exchanger 2, thus improving the uniformity of refrigerant distribution in each process. During operation, the surface of the second heat exchanger 2 exhibits high uniformity of frost formation, facilitating subsequent defrosting.

[0115] In this heat exchanger, the plane passing through the axis of the first tube 11 and the axis of the second tube 12 is defined as the first surface, and the plane passing through the axis of the third tube 23 and the axis of the fourth tube 24 is defined as the second surface. The included angle between the first surface and the second surface is greater than or equal to 85° and less than or equal to 100°. For example, the included angle between the first surface and the second surface can be 85°, 90°, 95°, 100°, etc.

[0116] In one specific embodiment, such as Figure 1 As shown, the axis of the first tube 11 is parallel to the axis of the second tube 12, and the axis of the third tube 23 is parallel to the axis of the fourth tube 24. In this case, the angle between the axes of the first tube 11, the second tube 12, the third tube 23, and the fourth tube 24 is the angle between the first surface and the second surface mentioned above. In this heat exchanger, the angle between the flow direction of the heat exchange medium in the first tube 11 and the second tube 12 and its flow direction in the third tube 23 and the fourth tube 24 is relatively large.

[0117] In other embodiments, the axis of the first tube 11 may not be parallel to the axis of the second tube 12, and the axis of the third tube 23 may not be parallel to the axis of the fourth tube 24. In this embodiment, the heat exchange medium flow path of the first heat exchanger 1 is connected to the heat exchange medium flow path of the second heat exchanger 2, that is, the heat exchange medium can enter the heat exchange medium flow path of the second heat exchanger 2 from the heat exchange medium flow path of the first heat exchanger 1, and / or, the heat exchange medium can enter the heat exchange medium flow path of the first heat exchanger 1 from the heat exchange medium flow path of the second heat exchanger 2. Therefore, the heat exchanger in this embodiment, due to including a first heat exchanger 1, has the advantages of uniform distribution of the heat exchange medium and high heat exchange efficiency. Furthermore, since it includes a first heat exchanger 1 and a second heat exchanger 2, the frosting starting point includes the connection position between the first heat exchange tube 13 of the first heat exchanger 1 and the inlet manifold, and the inlet position of each process in the second heat exchanger 2. Frosting in microchannel heat exchangers often starts at the connection between the manifold and the heat exchange tube, and then gradually extends along the direction of the heat exchange tube. The closer to the frosting starting point, the more frost is formed on the surface of the heat exchanger. Therefore, for a conventional first heat exchanger with a single frosting starting point structure, the amount of frost is greater near the inlet manifold and gradually decreases at other locations, resulting in poor frosting uniformity for the entire heat exchanger. Adding a frosting starting point can improve the frosting uniformity of the entire heat exchanger. That is, the heat exchanger has more frosting starting points, thereby improving its frosting performance.

[0118] In one specific embodiment, the angle between the axis of the first tube, the axis of the second tube, the axis of the third tube, and the axis of the fourth tube is 90°, that is, the direction in which the heat exchange medium flows in the two manifolds of the first heat exchanger 1 is perpendicular to the direction in which it flows in the two manifolds of the second heat exchanger 2.

[0119] Specifically, during the use of the first heat exchanger 1, the axes of the first tube 11 and the second tube 12 are located in the horizontal plane (the plane containing X and Y) or have a small angle with the horizontal plane, and the axis of the first heat exchange tube 13 is along the vertical direction Z or has a small angle with the vertical direction Z. That is, the heat exchange medium flows roughly horizontally in the two manifolds of the first heat exchanger 1 and is distributed to the first heat exchange tube 13. When the heat exchange medium flows roughly horizontally, it is less affected by gravity, thereby making the heat exchange medium distribution in the inlet manifold (first tube 11 or second tube 12) of the first heat exchanger 1 more uniform, and thus making the heat exchange efficiency of the first heat exchanger 1 higher. In the second heat exchanger 2, the axes of the third tube 23 and the fourth tube 24 are along the vertical direction Z or have a small angle with the vertical direction Z. The second heat exchange tube 21 is arranged horizontally or has a small angle with the horizontal plane. That is, the heat exchange medium flows approximately vertically in the two manifolds of the second heat exchanger 2 and is distributed to the second heat exchange tube 21, and the heat exchange medium flows approximately horizontally in the second heat exchange tube 21. The frosting of this second heat exchanger 2 is more uniform and the frosting performance is better. Therefore, the heat exchanger in this embodiment combines the first heat exchanger 1 and the second heat exchanger 2, so that the heat exchanger has high uniformity of heat exchange medium and high heat exchange efficiency, while also having good frosting performance.

[0120] Figure 1 In the illustrated embodiment, the first heat exchanger 1 can be a double-row heat exchanger, with the axes of the first tube 11 and the second tube 12 both horizontal and located below the first heat exchange tube 13. The first heat exchange tube 13 is bent and its two ends are connected to the first tube 11 and the second tube 12, respectively. The second heat exchanger 2 can be a single-row heat exchanger, with the axes of the third tube 23 and the fourth tube 24 both vertical Z. The second heat exchange tube 21 is arranged horizontally, and its two ends are connected to the third tube 23 and the fourth tube 24, respectively. The first tube 11 is provided with a heat exchange medium inlet 3, and the fourth tube 24 is provided with a heat exchange medium outlet 4. The second tube 12 and the fourth tube 24 are connected by a first connecting pipe 161.

[0121] The heat exchange medium enters the first tube 11 through the heat exchange medium inlet 3, flows horizontally within the first tube 11, and then enters each of the first heat exchange tubes 13. Within each of the first heat exchange tubes 13, it flows vertically upwards (Z-direction) and downwards into the second tube 12. The heat exchange medium in the second tube 12 enters the fourth tube 24 of the second heat exchanger 2 through the first connecting pipe 161. The fourth tube 24 is equipped with a baffle, which divides the fourth tube 24 into upper and lower regions. The lower region of the fourth tube 24 is connected to the first heat exchanger 1. When the heat exchange medium enters the lower region of the fourth tube 24, it... The heat exchange medium flows vertically upwards (Z-direction) within the domain. During its flow within the fourth tube 24, the medium is distributed to each of the second heat exchange tubes 21. Within each second heat exchange tube 21, it flows horizontally and enters the third tube 23. The heat exchange medium in the third tube 23 then enters the upper region of the fourth tube 24 via the second heat exchange tubes 21 and exits from the heat exchange medium outlet 4 located in the upper region of the fourth tube 24. In other words, the heat exchange medium first passes through the heat exchange medium flow path of the first heat exchanger 1, then through the heat exchange medium flow path in the lower region of the second heat exchanger 2, and finally exits from the heat exchange medium flow path in the upper region of the second heat exchanger 2. During its flow within the heat exchanger, the heat exchange medium exchanges heat with the air flowing through the duct.

[0122] In one specific embodiment, such as Figure 2-4 As shown, the second heat exchanger 2 includes a first heat exchange section 271 and a second heat exchange section 272 along the axial direction of the third tube 23. When the third tube 23 of the second heat exchanger 2 is in the vertical direction Z, the second heat exchanger 2 includes the first heat exchange section 271 and the second heat exchange section 272 in the vertical direction Z. The heat exchange medium flow path of the first heat exchange section 271 and the heat exchange medium flow path of the second heat exchange section 272 are not directly connected. Specifically, they can be connected through the heat exchange medium flow path of the first heat exchanger 1, so that the heat exchange medium can flow sequentially through the heat exchange medium flow path of the first heat exchange section 271, the heat exchange medium flow path of the first heat exchanger 1, and the heat exchange medium flow path of the second heat exchange section 272, or the heat exchange medium can flow sequentially through the heat exchange medium flow path of the second heat exchange section 272, the heat exchange medium flow path of the first heat exchanger 1, and the heat exchange medium flow path of the first heat exchange section 271.

[0123] In this embodiment, the second heat exchanger 2 is located on the windward side of the heat exchanger. Because the temperature difference between the air inside the duct of the windward heat exchanger and the heat exchange medium inside the heat exchanger is larger, the heat exchange between the heat exchange medium and the air in the windward heat exchanger is greater. In this embodiment, the heat exchange medium passes through the second heat exchanger located on the windward side twice, thereby increasing the heat exchange capacity of the heat exchange medium. In this embodiment, the windward side of the heat exchanger refers to the side where the outside air first passes. The outside air first passes through the windward heat exchanger and exchanges heat with the heat exchange medium, and then passes through the heat exchanger on the leeward side.

[0124] Specifically, the heat exchange medium outlet 4 of the heat exchanger is located on the windward side of the second heat exchanger 2. That is, the heat exchange medium enters the first heat exchanger 1 from the second heat exchanger 2 and returns to the second heat exchanger 2, and is discharged from the heat exchange medium outlet 4 of the second heat exchanger 2. When the heat exchange medium 4 first passes through the second heat exchanger 2, the temperature difference between the air and the heat exchange medium inside the second heat exchanger 2 is large, and the heat exchange is large. When the heat exchange medium 4 enters the first heat exchanger 1 located on the leeward side from the second heat exchanger 2, the temperature difference between the air and the heat exchange medium inside the first heat exchanger 1 is small because the air has already exchanged heat with the heat exchange medium inside the second heat exchanger 2, and the heat exchange is reduced. When the heat exchange medium re-enters the second heat exchanger 2 located on the windward side from the first heat exchanger 1, the temperature difference between the unexchanged outside air and the heat exchange medium inside the second heat exchanger 2 is large, and the heat exchange is large. Thus, the heat exchange medium discharged from the heat exchange medium outlet 4 of the second heat exchanger 2 has undergone sufficient heat exchange.

[0125] When the heat exchanger in this embodiment is used as a condenser, the heat exchange medium discharged from the heat exchange medium outlet 4 of the heat exchanger needs to have a high degree of subcooling. When the heat exchanger in this embodiment is used as an evaporator, the heat exchange medium discharged from the heat exchange medium outlet 4 of the heat exchanger needs to have a high degree of superheating. Both high degree of subcooling and high degree of superheating of the heat exchange medium are required to make the heat exchange capacity of the heat exchange medium high.

[0126] Specifically, such as Figure 2 As shown, the first part 271 of the second heat exchanger 2 is connected to the first tube 11 of the first heat exchanger 1 via a second connecting pipe 162, and the second part 272 of the second heat exchanger 2 is connected to the second tube 12 of the first heat exchanger 1 via a third connecting pipe 163. When the heat exchanger is used as an evaporator, the first part 271 of the second heat exchanger 2 is provided with a heat exchange medium inlet 3, and the second part 272 of the second heat exchanger 2 is provided with a heat exchange medium outlet 4. The heat exchange medium enters the first part 271 of the second heat exchanger 2 located on the windward side from the heat exchange medium inlet 3, and then enters the first tube 11 of the first heat exchanger 1 located on the leeward side through the second connecting pipe 162. It is then distributed to each of the first heat exchange tubes 13 through the first tube 11 and enters the second tube 12. Finally, it enters the second part 272 of the second heat exchanger 2 located on the windward side through the third connecting pipe 163, flows within the second part 272, and is discharged from the heat exchange medium outlet 4. At this time, due to the large total heat exchange between the heat exchange medium and the air, the heat exchange medium discharged from the heat exchange medium outlet 4 has a high degree of superheat.

[0127] When the heat exchanger is used as a condenser, the second part 272 of the second heat exchanger 2 is provided with a heat exchange medium inlet 3, and the first part 271 of the second heat exchanger 2 is provided with a heat exchange medium outlet 4. The heat exchange medium enters the second part 272 of the second heat exchanger 2 located on the windward side from the heat exchange medium inlet 3, and then enters the second tube 12 of the first heat exchanger 1 located on the leeward side through the third connecting pipe 163. It is then distributed to each of the first heat exchange tubes 13 through the second pipe 12 and enters the first tube 11. It then enters the first part 271 of the second heat exchanger 2 located on the windward side through the second connecting pipe 162, flows in the first part 271, and is discharged from the heat exchange medium outlet 4. At this time, because the total heat exchange between the heat exchange medium and the air is large, the heat exchange medium discharged from the heat exchange medium outlet 4 has a high degree of subcooling.

[0128] In one specific embodiment, such as Figure 3 and Figure 4 As shown, a first partition 231 is provided inside the third tube 23, dividing the third tube 23 into a first tube segment 232 and a second tube segment 233. A second partition 241 is provided inside the fourth tube 24, dividing the fourth tube 24 into a third tube segment 242 and a fourth tube segment 243. The first heat exchange section 271 includes the first tube segment 232, the third tube segment 242, and a portion of the second heat exchange tube 21, with the portion of the second heat exchange tube 21 located between the first tube segment 232 and the third tube segment 242. The second heat exchange section 272 includes the second tube segment 233, the fourth tube segment 243, and a portion of the second heat exchange tube 21, with the portion of the second heat exchange tube 21 located between the second tube segment 233 and the fourth tube segment 243.

[0129] In this embodiment, the second heat exchanger 2 can be divided into a first heat exchange section 271 and a second heat exchange section 272 simply by setting a first partition 231 and a fourth partition 241 in the third tube 23 and the fourth tube 24 of the second heat exchanger 2, respectively, making the structure of the second heat exchanger 2 simple and the cost low.

[0130] like Figure 3 As shown, the third tube 23 of the second heat exchanger 2 is also provided with a first inlet 235 and a first outlet 234. The first outlet 234 is located in the first heat exchange section 271 and is connected to the first tube 11 of the first heat exchanger 1 through the second connecting tube 162. The first inlet 235 is located in the second heat exchange section 272 and is connected to the second tube 12 of the first heat exchanger 1 through the third connecting tube 163.

[0131] In another specific embodiment, the first heat exchange section 271 and the second heat exchange section 272 of the second heat exchanger 2 can be formed by separate heat exchangers. This application does not limit the formation method of the first heat exchange section 271 and the second heat exchange section 272.

[0132] In yet another specific embodiment, such as Figure 5-7 As shown, the first tube 11 of the first heat exchanger 1 is provided with a heat exchange medium inlet 3, and a gas-liquid separation tube 15 is provided inside the first tube 11. The gas-liquid separation tube 15 is used to separate the gas-liquid two-phase heat exchange medium in the first tube 11 into gaseous and liquid states. The gaseous heat exchange medium flows along the gas-liquid separation tube 15, and the liquid heat exchange medium flows inside the first tube 11. The gas-liquid separation tube 15 has a first end 152 and a second end along its length. The second end of the gas-liquid separation tube 15 is connected to the heat exchange medium flow path of the second heat exchanger 2, so that the gaseous heat exchange medium in the gas-liquid separation tube 15 enters the second heat exchanger 2, and the liquid heat exchange medium is distributed to each of the first heat exchange tubes 13 through the first tube 11 for heat exchange. The distribution uniformity of the liquid heat exchange medium in the first heat exchanger 1 is relatively high, and when the gaseous heat exchange medium with a smaller heat exchange capacity is separated from the first heat exchanger 1, the heat exchange efficiency of the first heat exchanger 1 can be improved.

[0133] Among them, such as Figure 7 As shown, there is a gap between the first end 152 of the gas-liquid separation pipe 15 and the heat exchange medium inlet 3, thereby preventing the first end 152 of the gas-liquid separation pipe 15 from blocking the heat exchange medium from entering the first pipe 11 and improving the flow uniformity of the heat exchange medium after entering the first pipe 11, further improving the heat exchange medium distribution uniformity of the first heat exchanger 1. Furthermore, the first end 152 of the gas-liquid separation pipe 15 is closed, thereby preventing the heat exchange medium entering the first pipe 11 from the heat exchange medium inlet 3 from directly entering the gas-liquid separation pipe 15. A through hole 151 is provided on the peripheral wall of the gas-liquid separation pipe 15, allowing the gaseous heat exchange medium to enter the gas-liquid separation pipe 15 through the through hole 151. When the liquid heat exchange medium enters the gas-liquid separation pipe 15, under the action of gravity, the liquid heat exchange medium can be discharged from the through hole 151 into the first pipe 11, thereby reducing the amount of liquid heat exchange medium in the gas-liquid separation pipe 15, so that most of the liquid heat exchange medium is distributed to each of the first heat exchange pipes 13 through the first pipe 11.

[0134] like Figure 5 As shown, in this embodiment, the first tube 11 and the second tube 12 of the first heat exchanger 1 are located above each of the first heat exchange tubes 13, so that when the heat exchange medium enters the first tube 11, the liquid heat exchange medium flows downward under the action of gravity and is distributed to each of the first heat exchange tubes 13, while the gaseous heat exchange medium flows upward into the gas-liquid separation tube 15, thereby improving the efficiency of gas-liquid separation.

[0135] Specifically, such as Figure 8 As shown, the second heat exchanger 2 includes at least a third heat exchange section 273 and a fourth heat exchange section 274. The heat exchange medium flow path of the third heat exchange section 273 is connected to the heat exchange medium flow path of the fourth heat exchange section 274. The fourth heat exchange section 274 is provided with a heat exchange medium outlet 4. The second end of the gas-liquid separation pipe 15 and the heat exchange medium flow path of the first heat exchanger 1 are respectively connected to the heat exchange medium flow path of the third heat exchange section 273. For example... Figure 5 and Figure 8 As shown, the second end of the gas-liquid separation pipe 15 is connected to the third heat exchange section 273 through the fourth connecting pipe 164, and the heat exchange medium flow path of the first heat exchange medium 1 is connected to the third heat exchange section 273 through the fifth connecting pipe 165.

[0136] The heat exchanger includes a first flow path and a second flow path. The first flow path is used for gaseous heat exchange medium, and the second flow path is used for liquid heat exchange medium. The first flow path includes at least the heat exchange medium flow path of the third heat exchange section 273 and the heat exchange medium flow path of the fourth heat exchange section 274. The second flow path includes at least the heat exchange medium flow path of the first heat exchanger 1, the heat exchange medium flow path of the third heat exchange section 273, and the heat exchange medium flow path of the fourth heat exchange section 274. The heat exchange medium enters the first pipe 11 through the heat exchange medium inlet 3 and is separated by the gas-liquid separator 15. The gaseous heat exchange medium then enters the third heat exchange section 273 of the second heat exchanger 2 through the gas-liquid separator 15 and the fourth connecting pipe 164. The liquid heat exchange medium is distributed to each of the first heat exchange pipes 13 through the first pipe 11 to exchange heat with the air, then enters the second pipe 12, and then enters the third heat exchange section 273 of the second heat exchanger 2 through the fifth connecting pipe 165. In the third heat exchange section 273, the gaseous heat exchange medium mixes with the heat-exchanged liquid heat exchange medium, and finally exits from the heat exchange medium outlet 4 located in the fourth heat exchange section 274. The mixing of the gaseous heat exchange medium and the heat-exchanged liquid heat exchange medium in the third heat exchange section 273 can improve the uniformity of the heat exchange medium in the second heat exchanger 2, thereby improving the heat exchange efficiency of the heat exchange medium in the second heat exchanger 2.

[0137] More specifically, such as Figure 8-10 As shown, a third partition 238 is provided inside the third tube 23, dividing the third tube 23 into a fifth tube segment 236 and a sixth tube segment 237. A fourth partition 247 is provided inside the fourth tube 24, dividing the fourth tube 24 into a seventh tube segment 245 and an eighth tube segment 246. At this time, the third heat exchange section 273 includes the fifth tube segment 236, the seventh tube segment 245, and a portion of the second heat exchange tube 21, with the portion of the second heat exchange tube 21 located between the fifth tube segment 236 and the seventh tube segment 245. The fourth heat exchange section 274 includes the sixth tube segment 237, the eighth tube segment 246, and a portion of the second heat exchange tube 21, with the portion of the second heat exchange tube 21 located between the sixth tube segment 237 and the eighth tube segment 246.

[0138] In this embodiment, the second heat exchanger 2 can be divided into a third heat exchange section 273 and a fourth heat exchange section 274 simply by setting a third partition 238 and a fourth partition 247 in the third tube 23 and the fourth tube 24 of the second heat exchanger 2, respectively, making the structure of the second heat exchanger 2 simple and the cost low.

[0139] like Figure 8As shown, the third tube 23 of the second heat exchanger 2 is also provided with a second inlet 239 and a third inlet 244. The second inlet 239 is located in the third heat exchange section 273 and is connected to the gas-liquid separation tube 15 of the first heat exchanger 1 through a fourth connecting tube 164. The third inlet 244 is located in the fourth heat exchange section 274 and is connected to the second tube 12 of the first heat exchanger 1 through a fifth connecting tube 165.

[0140] More specifically, the second heat exchanger 2 may further include a fifth heat exchange section (not shown in the figure) located between the third heat exchange section 273 and the fourth heat exchange section 274, wherein the heat exchange medium flow path of the fifth heat exchange section is connected in series with the coolant flow path of the third heat exchange section 273 and the coolant flow path of the fourth heat exchange section 274. In this case, the first flow path for the gaseous heat exchange medium includes the heat exchange medium flow path of the third heat exchange section 273, the heat exchange medium flow path of the fifth heat exchange section, and the heat exchange medium flow path of the fourth heat exchange section 274, and the second flow path for the liquid heat exchange medium includes the heat exchange medium flow path of the first heat exchanger 1, the heat exchange medium flow path of the third heat exchange section 273, the heat exchange medium flow path of the fifth heat exchange section, and the heat exchange medium flow path of the fourth heat exchange section 274.

[0141] The heat exchange medium enters the first pipe 11 through the heat exchange medium inlet 3 and is separated by the gas-liquid separator 15. The gaseous heat exchange medium then enters the third heat exchange section 273 of the second heat exchanger 2 through the gas-liquid separator 15 and the fourth connecting pipe 164. The liquid heat exchange medium is distributed to each of the first heat exchange pipes 13 through the first pipe 11 to exchange heat with the air, then enters the second pipe 12, and then enters the third heat exchange section 273 of the second heat exchanger 2 through the fifth connecting pipe 165. In the third heat exchange section 273, the gaseous heat exchange medium mixes with the heat-exchanged liquid heat exchange medium, and is further mixed in the fifth heat exchange section of the second heat exchanger 2. Finally, it is discharged from the heat exchange medium outlet 4 located in the fourth heat exchange section 274. The fifth heat exchange section further improves the uniformity of the mixing between the gaseous heat exchange medium and the heat-exchanged liquid heat exchange medium, thereby further improving the heat exchange efficiency of the heat exchange medium in the second heat exchanger 2.

[0142] Among them, such as Figure 8 As shown, in the vertical direction, the fourth heat exchange section 274 is located above the third heat exchange section 273. That is, the gaseous heat exchange medium after being separated by the gas-liquid separation pipe 15 first enters the lower third heat exchange section 273, and the liquid heat exchange medium after heat exchange in the first heat exchanger 1 also first enters the lower third heat exchange section 273, and mixes with the gaseous heat exchange medium in the third heat exchange section 273. The mixed heat exchange medium flows upward to the fourth heat exchange section 274, which can improve the mixing uniformity of the liquid heat exchange medium and the gaseous heat exchange medium, as well as the uniformity of the heat exchange medium flow.

[0143] Figure 5In the embodiment shown, the first heat exchanger 1 is located on the windward side of the heat exchanger, the second heat exchanger 2 is located on the leeward side of the heat exchanger, and the heat exchange medium inlet 3 is located on the first heat exchanger 1 located on the windward side.

[0144] In the above embodiments, as Figure 11 and Figure 12 As shown, the second heat exchanger 2 includes a sixth heat exchange section 275 and a seventh heat exchange section 276 that are bent relative to each other, so that the second heat exchanger 2 has an L-shaped structure. The second heat exchange tube 21 includes a first section 211 and a second section 212 that are bent relative to each other. The sixth heat exchange section 275 includes a fourth tube 24 and the first section 211, and the seventh heat exchange section 276 includes a third tube 23 and the second section 212. In this second heat exchanger 2, the third tube 23 and the fourth tube 24, which are more difficult to bend, do not need to be bent. Bending the second heat exchange tube 23, which is less difficult to bend, can reduce the processing difficulty, and the L-shaped structure is more convenient to arrange in a small space, which can increase the heat exchange area and thus improve the heat exchange performance.

[0145] In this design, the length of the first segment 211 in the second heat exchange tube 23 is greater than the length of the second segment 212, resulting in the area of ​​the sixth heat exchange section 275 being larger than the area of ​​the seventh heat exchange section 276. When arranging the second heat exchanger 2, the larger sixth heat exchange section 275 is placed in a location with more space, while the smaller seventh heat exchange section 276 is placed in a location with less space. In this case, the first heat exchanger 1 is arranged in parallel with the larger sixth heat exchange section 276, resulting in a larger heat exchange area for the first heat exchanger 1 and improving its heat exchange performance.

[0146] In the above embodiments, the first heat exchanger 1 can be a single-row heat exchanger, a double-row heat exchanger, or a multi-row heat exchanger. For example... Figure 11 In the embodiment shown, the first heat exchanger 1 is a single-row heat exchanger, and its first tube 11 is provided with a heat exchange medium inlet 3. The fourth tube 24 of the second heat exchanger 2 is provided with a heat exchange medium outlet 4. The second tube 12 of the first heat exchanger 1 and the fourth tube 24 of the second heat exchanger 2 are connected through a sixth connecting tube 166.

[0147] In the above embodiments, as Figure 13 As shown, the second heat exchanger 2 may further include a fifth tube 25 and a sixth tube 26. At least a portion of the second heat exchange tube 21 is connected to the fifth tube 25 and the sixth tube 26 at both ends along its length. In this case, the fifth tube 25, the sixth tube 26, and the portion of the second heat exchange tube 21 connecting them form an eighth heat exchange section 277, which is connected in parallel with the heat exchange medium flow path of the second heat exchanger 2. At this time, the fluid in the eighth heat exchange section 277 can exchange heat with the air in the air duct of the second heat exchanger 2, and the fluid in the eighth heat exchange section 277 can also exchange heat with the heat exchange medium in the heat exchange medium flow path of the second heat exchanger 2.

[0148] Specifically, one of the fifth tube 25 and the sixth tube 26 is provided with an inlet, and the other is provided with an outlet. The inlet and outlet are used to communicate with the flow channel of the external equipment, so that the heat recovery medium of the external equipment can be introduced into the eighth heat exchange section 277 of the second heat exchanger 2, thereby exchanging heat between the heat recovery medium and the heat exchange medium of the second heat exchanger 2, improving the heat exchange performance of the second heat exchanger 2, and making reasonable use of the heat of the heat recovery medium of the external equipment, thus saving energy.

[0149] Among them, such as Figure 13 In the illustrated embodiment, the fifth tube 25 is provided with a fourth inlet 5, and the sixth tube 26 is provided with a fourth outlet 6. The axes of the fifth tube 25 and the sixth tube 26 are parallel to the axes of the third tube 23 and the fourth tube 24. When the axes of the third tube 23 and the fourth tube 24 are in the vertical direction Z, the axes of the fifth tube 25 and the sixth tube 26 are also in the vertical direction Z. The lengths of the fifth tube 25 and the sixth tube 26 are less than the lengths of the third tube 23 and the fourth tube 25. The fourth tube 24 is provided with a partition, which divides the fourth tube 24 into upper and lower regions. The lengths of the fifth tube 25 and the sixth tube 26 can be the same as or different from the length of the lower region of the fourth tube 24. The lower region of the fourth tube 24 is connected to the second tube 12 of the first heat exchanger 1 through a seventh connecting pipe 167. The first tube 11 of the first heat exchanger 1 is provided with a heat exchange medium inlet 3, and the fourth tube 24 of the second heat exchanger 2 is provided with a heat exchange medium outlet 4.

[0150] When the heat exchanger is working, the heat exchange medium enters the first tube 11 through the heat exchange medium inlet 3, flows horizontally in the first tube 11, and enters each of the first heat exchange tubes 13. In each of the first heat exchange tubes 13, it flows vertically upward (Z) and downward into the second tube 12. The heat exchange medium in the second tube 12 enters the area above the fourth tube 24 of the second heat exchanger 2 through the seventh connecting tube 167. It flows in the area above the fourth tube 24, and during the flow of the heat exchange medium in the area above the fourth tube 24, it is distributed to the second heat exchange tubes 21 that are connected to the area above the fourth tube 24. In each of the second heat exchange tubes 21, it flows horizontally and enters the third tube 23. The heat exchange medium in the third tube 23 enters each of the second heat exchange tubes 21 that are connected to the area below the fourth tube 24. In this process, the regenerating medium enters each of the second heat exchange tubes 21 of the eighth heat exchange section 277 from the fourth inlet 5 of the fifth tube 25, and exchanges heat with the heat exchange medium in the second heat exchange tube 21. After the heat exchange is completed, it is discharged from the heat exchange medium outlet 4 of the eighth heat exchange section 277. During the flow of the heat exchange medium and the regenerating medium in the heat exchanger, they exchange heat with the air flowing through the air duct.

[0151] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A heat exchanger, characterized in that, The heat exchanger includes: The first heat exchanger includes a first tube, a second tube, and a plurality of first heat exchange tubes. The first heat exchange tubes connect the first tube and the second tube, and the first tube, the second tube, and the plurality of first heat exchange tubes form a heat exchange medium flow path for the first heat exchanger. The second heat exchanger includes a third tube, a fourth tube, and a plurality of second heat exchange tubes. The second heat exchange tubes are connected to the third tube and the fourth tube. The third tube, the fourth tube, and the plurality of second heat exchange tubes form the heat exchange medium flow path of the second heat exchanger. The heat exchange medium flow path of the first heat exchanger is connected to the heat exchange medium flow path of the second heat exchanger; The plane that passes through the axis of the first tube and the axis of the second tube simultaneously is defined as the first plane, and the plane that passes through the axis of the third tube and the axis of the fourth tube simultaneously is defined as the second plane. The angle formed by the first plane and the second plane is greater than or equal to 85° and less than or equal to 100°.

2. The heat exchanger according to claim 1, characterized in that, The axes of the first tube and the second tube are horizontal, while the axes of the third tube and the fourth tube are vertical.

3. The heat exchanger according to claim 1, characterized in that, The second heat exchanger includes a first heat exchange section and a second heat exchange section along the axial direction of the third tube. The heat exchange medium flow path of the first heat exchange section and the heat exchange medium flow path of the second heat exchange section are connected through the heat exchange medium flow path of the first heat exchanger.

4. The heat exchanger according to claim 3, characterized in that, The second heat exchanger is provided with a heat exchange medium inlet and a heat exchange medium outlet. The heat exchange medium inlet is located in the first heat exchange section, and the heat exchange medium outlet is located in the second heat exchange section. Alternatively, the heat exchange medium inlet may be located in the second heat exchange section, and the heat exchange medium outlet may be located in the first heat exchange section; The second heat exchanger is located on the windward side of the heat exchanger.

5. The heat exchanger according to claim 3, characterized in that, The third pipe is provided with a first baffle, which divides the third pipe into a first pipe segment and a second pipe segment; the fourth pipe is provided with a second baffle, which divides the fourth pipe into a third pipe segment and a fourth pipe segment. The first heat exchange section includes a first pipe segment, a third pipe segment, and a portion of the second heat exchange tube, with the portion of the second heat exchange tube located between the first pipe segment and the third pipe segment. The second heat exchange section includes a second pipe segment, a fourth pipe segment, and a portion of the second heat exchange tube, with the portion of the second heat exchange tube located between the second pipe segment and the fourth pipe segment.

6. The heat exchanger according to claim 1, characterized in that, The first tube is provided with a heat exchange medium inlet, and a gas-liquid separation tube is provided inside the first tube. The gas-liquid separation tube has a first end and a second end along its length. There is a gap between the first end of the gas-liquid separation tube and the heat exchange medium inlet, and the second end of the gas-liquid separation tube is connected to the heat exchange medium flow path of the second heat exchanger.

7. The heat exchanger according to claim 6, characterized in that, The second heat exchanger includes at least a third heat exchange section and a fourth heat exchange section, wherein the heat exchange medium flow path of the third heat exchange section is connected to the heat exchange medium flow path of the fourth heat exchange section; The second end of the gas-liquid separator and the heat exchange medium flow path of the first heat exchanger are respectively connected to the heat exchange medium flow path of the third heat exchange section, and the fourth heat exchange section is provided with a heat exchange medium outlet. The heat exchanger includes a first flow path for a gaseous heat exchange medium and a second flow path for a liquid heat exchange medium. The first flow path includes at least the heat exchange medium flow path of the third heat exchange section and the heat exchange medium flow path of the fourth heat exchange section. The second flow path includes at least the heat exchange medium flow path of the first heat exchanger, the heat exchange medium flow path of the third heat exchange section, and the heat exchange medium flow path of the fourth heat exchange section.

8. The heat exchanger according to claim 7, characterized in that, In the vertical direction, the fourth heat exchange section is located above the third heat exchange section.

9. The heat exchanger according to claim 7, characterized in that, The second heat exchanger further includes a fifth heat exchange section located between the third heat exchange section and the fourth heat exchange section, wherein the heat exchange medium flow path of the fifth heat exchange section is connected in series with the coolant flow path of the third heat exchange section and the coolant flow path of the fourth heat exchange section; The first flow path includes the heat exchange medium flow path of the third heat exchange section, the heat exchange medium flow path of the fifth heat exchange section, and the heat exchange medium flow path of the fourth heat exchange section. The second flow path includes the heat exchange medium flow path of the first heat exchanger, the heat exchange medium flow path of the third heat exchange section, the heat exchange medium flow path of the fifth heat exchange section, and the heat exchange medium flow path of the fourth heat exchange section.

10. The heat exchanger according to claim 7, characterized in that, The third pipe is provided with a third baffle, which divides the third pipe into a fifth pipe segment and a sixth pipe segment; the fourth pipe is provided with a fourth baffle, which divides the fourth pipe into a seventh pipe segment and an eighth pipe segment. The third heat exchange section includes the fifth pipe segment, the seventh pipe segment, and a portion of the second heat exchange tube, with the portion of the second heat exchange tube located between the fifth pipe segment and the seventh pipe segment. The fourth heat exchange section includes the sixth pipe segment, the eighth pipe segment, and a portion of the second heat exchange tube, with the portion of the second heat exchange tube located between the sixth pipe segment and the eighth pipe segment.

11. The heat exchanger according to claim 6, characterized in that, The gas-liquid separator has a through hole on its peripheral wall, and the first end of the gas-liquid separator is closed.

12. The heat exchanger according to any one of claims 6-11, characterized in that, The first heat exchanger is located on the windward side of the heat exchanger.

13. The heat exchanger according to any one of claims 1-11, characterized in that, The second heat exchanger also includes a fifth tube and a sixth tube, with at least a portion of the second heat exchange tube connected to the fifth tube and the sixth tube at both ends along its length.

14. The heat exchanger according to claim 13, characterized in that, One of the fifth pipe and the sixth pipe is provided with an inlet, and the other is provided with an outlet. The inlet and the outlet are used to communicate with the flow channel of an external device.

15. The heat exchanger according to any one of claims 1-11, characterized in that, The second heat exchanger includes a sixth heat exchange section and a seventh heat exchange section that are bent relative to each other, so that the second heat exchanger has an L-shaped structure. The second heat exchange tube includes a first section and a second section that are bent relative to each other. The sixth heat exchange section includes the fourth tube and the first section. The seventh heat exchange section includes the third tube and the second section. The area of ​​the sixth heat exchange section is larger than that of the seventh heat exchange section, and the first heat exchanger and the sixth heat exchange section are arranged in parallel.

16. An air conditioning system, the air conditioning system comprising a compressor, a condenser, a throttling device, and an evaporator, characterized in that, The evaporator and / or condenser is the heat exchanger according to any one of claims 1 to 15.

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