Heat exchanger

Abstract

The utility model relates to vehicle air conditioning technical field and provide a kind of heat exchanger, the heat exchanger of the utility model mainly includes first water chamber, second water chamber and multiple flat tubes connected between the two, multiple flat tubes are divided into multiple groups sequentially arranged along the first direction, each group of flat tubes includes multiple flat tubes stacked along the first direction, first water chamber is divided into liquid inlet chamber and liquid outlet chamber, and the heat exchange fluid into liquid inlet chamber is shunted to each group of flat tubes, and the heat exchange fluid flowing through each group of flat tubes can be converged to liquid outlet chamber after flowing out. The heat exchanger of the utility model, multiple groups of flat tubes are connected in parallel, can form multiple flow processes parallel form, can effectively reduce the temperature difference of import and export, improve heat exchange uniformity.

Description

Technical Field

[0001] This utility model relates to the field of vehicle air conditioning system technology, and in particular to a heat exchanger suitable for vehicle air conditioning systems. Background Technology

[0002] Heat exchangers are important components in automotive air conditioning systems. For example, in the interior air cooler, refrigerant enters the interior air cooler and continuously releases heat during its flow. The fins on the surface of the interior air cooler continuously exchange heat with the air it comes into contact with, thereby achieving the purpose of heating.

[0003] Currently, the most common type of interior air cooler for vehicle air conditioning systems on the market is the parallel flow heat exchanger, which is a compact type of heat exchanger. In the structure of a conventional interior air cooler, the refrigerant typically flows through two channels. Due to the properties of the refrigerant, the temperature difference between the inlet and outlet is usually around 80°C, which results in poor temperature uniformity in the interior air cooler.

[0004] Generally speaking, the temperature of the flat tube closer to the inlet / outlet is higher, while the temperature of the flat tube farther away from the inlet / outlet is lower. This can lead to uneven air temperature when the passenger compartment is heated, affecting the user experience. Utility Model Content

[0005] In view of this, the present invention aims to provide a heat exchanger to improve heat exchange uniformity.

[0006] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0007] A heat exchanger suitable for a vehicle air conditioning system includes a first water chamber and a second water chamber arranged opposite to each other, and a plurality of flat tubes located between the first water chamber and the second water chamber;

[0008] Both the first water chamber and the second water chamber extend along a first direction, and multiple sets of flat tubes are arranged sequentially along the first direction. Each set of flat tubes includes multiple flat tubes stacked along the first direction.

[0009] The first water chamber is divided into an inlet chamber and an outlet chamber. A portion of each set of flat tubes is connected to the inlet chamber, and another portion of each set of flat tubes is connected to the outlet chamber. Each set of flat tubes is also connected to the second water chamber.

[0010] The heat exchange fluid entering the inlet chamber is diverted to each set of flat tubes, and the heat exchange fluid flowing through each set of flat tubes can converge into the outlet chamber and then flow out.

[0011] Furthermore, each group of flat tubes includes two rows arranged side by side along a second direction, the second direction being perpendicular to the first direction; the liquid inlet chambers are multiple, each corresponding to one group of flat tubes, and the liquid outlet chambers are multiple, each corresponding to one group of flat tubes; in each group of flat tubes, one row of flat tubes is connected to the liquid inlet chamber corresponding to that group of flat tubes, and the other row of flat tubes is connected to the liquid outlet chamber corresponding to that group of flat tubes.

[0012] Furthermore, the first water chamber includes a first cover plate, a first distribution plate, a first reversing plate, and a first main plate that are stacked sequentially; each of the liquid inlet chambers includes a liquid inlet cavity formed between the first cover plate and the first distribution plate, and a distribution channel provided on the first distribution plate and the first reversing plate; the liquid inlet cavity and the distribution channel both extend along the first direction, and each group of flat tubes and the corresponding liquid inlet chamber are configured such that a portion of one row of flat tubes communicates with the liquid inlet cavity through the distribution channel.

[0013] Furthermore, each of the discharge chambers includes a discharge cavity formed between the first cover plate and the first distribution plate, and a collection channel provided on the first distribution plate and the first reversing plate; the discharge cavity and the collection channel both extend along the first direction, and the group of flat tubes and the corresponding discharge chambers are all configured such that a portion of another row of flat tubes communicates with the discharge cavity through the collection channel; the first reversing plate is provided with a reversing channel, which consists of multiple reversing channels spaced apart along the first direction, and each group of flat tubes is provided with a reversing channel, and in each group of two rows of flat tubes, two flat tubes located at the same stacked position are connected through the reversing channel.

[0014] Furthermore, the first water chamber also includes a first channel plate located between the first reversing plate and the first main board; the first main board is provided with a plurality of first openings, each of which is used to insert the flat tube, and the edge of each first opening is provided with a first flange that bends toward the flat tube, and the first channel plate is provided with a first clearance hole to avoid each of the first flanges.

[0015] Furthermore, the first motherboard has third flanges on both sides in the second direction, and the first channel plate, the first reversing plate, the first distribution plate and the first cover plate are sequentially welded and fixed between the third flanges on both sides.

[0016] Furthermore, one end of the first water chamber is provided with a connector, the connector having an inlet channel and an outlet channel; the first water chamber is provided with a first connecting port connecting the inlet channel to each of the inlet chambers, and the first water chamber is provided with a second connecting port connecting the outlet chamber to each of the outlet channels; wherein, among the first connecting ports, the first connecting port connecting to the inlet chamber closest to the connector has the smallest connecting area, and / or, among the second connecting ports, the second connecting port connecting to the outlet chamber closest to the connector has the smallest connecting area.

[0017] Furthermore, the second water chamber includes a second cover plate and a second main plate connected together, and a second channel plate located between the second cover plate and the second main plate; the second main plate is provided with a plurality of second openings, each of which is used to insert the flat tube, and the edge of each second opening is provided with a second flange that bends toward the flat tube; the second channel plate is provided with second clearance holes that respectively make way for each of the second flanges.

[0018] Furthermore, the second water chamber also includes a partition, and the cavity between the second cover plate and the second channel plate is divided into multiple independent second sub-cavities by the partition; the multiple second sub-cavities are arranged one-to-one with each group of flat tubes, and each second sub-cavity is divided into multiple connected sub-cavities arranged side by side; in each group of flat tubes, two connected sub-cavities are provided for each row of flat tubes, and each connected sub-cavity extends along the first direction and connects to each flat tube in the corresponding row.

[0019] Furthermore, the second motherboard has a fourth flange on both sides in the second direction, and the second channel plate and the second cover plate are sequentially welded and fixed between the fourth flanges on both sides.

[0020] Compared with the prior art, this utility model has the following advantages:

[0021] (1) The heat exchanger described in this utility model divides multiple flat tubes into multiple groups, and through the liquid inlet chamber and liquid outlet chamber in the first water chamber, a part of each group of flat tubes is connected to the liquid inlet chamber and the other part is connected to the liquid outlet chamber. Each group of flat tubes is connected through the second water chamber, so that multiple groups of flat tubes are arranged in parallel to form a multi-process parallel configuration, which can effectively reduce the temperature difference between the inlet and outlet, improve the temperature consistency of each flat tube, and improve the heat exchange uniformity.

[0022] (2) Each set of flat tubes is set in two rows, so that each set of flat tubes can be connected to the inlet chamber and the outlet chamber respectively, and the inlet chamber and the outlet chamber are respectively connected to each set of flat tubes, which facilitates the overall layout and facilitates the connection between the inlet chamber and the outlet chamber and the corresponding set of flat tubes respectively.

[0023] (3) The first water chamber includes a first cover plate, a first distribution plate, a first reversing plate and a first main plate. Each liquid inlet chamber includes a liquid inlet cavity and a distribution channel, so that the liquid inlet cavity extends along the first direction to facilitate the provision of heat exchange fluid for multiple flat tubes, and the distribution channels extend along the first direction to facilitate corresponding communication with multiple flat tubes.

[0024] (4) The liquid outlet chamber includes a liquid outlet cavity and a collection channel. The liquid outlet cavity extends along the first direction to facilitate the collection of heat exchange fluid in the flat tubes, while the collection channel extends along the first direction to facilitate the collection of heat exchange fluid in multiple flat tubes. The reversing channels connect two flat tubes located at the same stack position in the two rows of flat tubes, which can increase the number of flow paths, allowing the heat exchange fluid entering from the same liquid inlet cavity to flow through more flat tubes, resulting in more complete heat exchange, higher heat exchange performance, and convenient overall arrangement of the heat exchanger.

[0025] (5) The first opening provided on the first main board can facilitate the positioning of each flat tube and facilitate the welding connection between the flat tube and the first main board. The first flange provided on the edge of each first opening is conducive to improving the stability and reliability of the flat tube positioning. The first clearance hole provided is convenient for the end of the flat tube to be inserted into the first clearance hole and welded to the first main board, which helps to prevent the solder from blocking the channel inside the flat tube.

[0026] (6) The third flange can play a positioning role in the welding process of the first water chamber, so as to facilitate the welding of the first channel plate, the first reversing plate, the first distribution plate, the first cover plate and the first main board together without the need for external tooling, which helps to improve welding efficiency.

[0027] (7) The first connection port connected to the liquid inlet chamber near the adapter has the smallest connection area, and the second connection port connected to the liquid outlet chamber near the adapter has the smallest connection area, so that the flow rate of the heat exchange fluid can be better distributed, which is conducive to improving the heat exchange effect and effectively improving the temperature uniformity between the flat tubes.

[0028] (8) The second water chamber includes a second cover plate, a second main plate and a second channel plate. The second opening facilitates the positioning of each flat tube and the welding connection between the flat tube and the second main plate. The second flange provided at the edge of each second opening helps to improve the stability and reliability of the flat tube positioning. The second clearance hole facilitates the insertion of the end of the flat tube into the second clearance hole and welding with the second main plate, which helps to prevent the solder from blocking the channel inside the flat tube.

[0029] (9) The partition is set so that the second sub-cavity corresponds to each group of flat tubes, which makes it convenient for multiple flat tubes of each group to be connected through the corresponding second sub-cavity. The connecting sub-cavity is set and extends along the first direction to facilitate the simultaneous connection of multiple flat tubes.

[0030] (10) The fourth flange can play a positioning role in the welding process of the second water chamber, which makes it convenient for the second channel plate, the second cover plate and the second main plate to be welded together quickly without the need for external tooling, thus improving welding efficiency. Attached Figure Description

[0031] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0032] Figure 1 This is a schematic diagram of an exemplary structure of the heat exchanger described in an embodiment of the present utility model;

[0033] Figure 2 Figure 1 Exploded view;

[0034] Figure 3 This is an exemplary structural diagram of the first motherboard described in an embodiment of the present utility model;

[0035] Figure 4 This is an exemplary structural diagram of the first distribution plate described in an embodiment of the present utility model;

[0036] Figure 5 This is an exemplary structural diagram of the first commutator plate described in an embodiment of the present utility model;

[0037] Figure 6 This is an exemplary structural diagram of the first channel plate described in an embodiment of the present utility model;

[0038] Figure 7 This is an exemplary structural diagram of the second cover plate described in an embodiment of the present utility model;

[0039] Figure 8 This is an exemplary flowchart of the flow of heat exchange fluid within a heat exchanger as described in an embodiment of the present invention;

[0040] Figure 9 This is another exemplary flowchart illustrating the flow of heat exchange fluid within the heat exchanger as described in this embodiment of the present invention.

[0041] Explanation of reference numerals in the attached figures:

[0042] 1. First water chamber;

[0043] 101. First cover plate; 102. First distribution board; 103. First reversing board; 104. First main board; 105. First channel board;

[0044] 10A, Distribution Channel; 10B, Aggregation Channel; 10C, First Connector; 10D, Second Connector;

[0045] 1041, First opening; 1042, First fold; 1043, Third fold; 10431, First notch;

[0046] 1051, First clearance hole;

[0047] 1031. Reversing channel;

[0048] 2. Second water chamber;

[0049] 201. Second cover plate; 202. Second main board; 203. Second channel board; 204. Partition plate;

[0050] 2011, Mounting holes;

[0051] 20A, Second sub-cavity; 20A1, Connecting sub-cavity;

[0052] 2021, Second opening; 2022, Second fold; 2023, Fourth fold; 20231, Second notch;

[0053] 2031, Second clearance hole;

[0054] 3. Flat tube; 4. Adapter; 401. Liquid inlet channel; 402. Liquid outlet channel;

[0055] 5. Side panels;

[0056] S, gap; K1, inlet chamber; K2, outlet chamber. Detailed Implementation

[0057] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other.

[0058] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" appear, indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, if terms such as "first" or "second" appear, they are also used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0059] Furthermore, in the description of this utility model, unless otherwise explicitly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model in light of the specific circumstances.

[0060] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0061] Heat exchangers are important components in automotive air conditioning systems. For example, in the interior air cooler, refrigerant enters the interior air cooler and continuously releases heat during its flow. The fins on the surface of the interior air cooler continuously exchange heat with the air it comes into contact with, thereby achieving the purpose of heating.

[0062] Currently, the most common type of interior air cooler for vehicle air conditioning systems on the market is the parallel flow heat exchanger, which is a compact type of heat exchanger. In the structure of a conventional interior air cooler, the refrigerant typically flows through two channels. Due to the properties of the refrigerant, the temperature difference between the inlet and outlet is usually around 80°C, which results in poor temperature uniformity in the interior air cooler.

[0063] Generally speaking, the temperature of the flat tube closer to the inlet / outlet is higher, while the temperature of the flat tube farther away from the inlet / outlet is lower. This can lead to uneven air temperature when the passenger compartment is heated, affecting the user experience.

[0064] Because the indoor air cooler has a long water chamber and short flat tubes, unlike the four- or six-flow evaporator, dividing the internal flow of the indoor air cooler into a continuous four- or six-flow series configuration has little impact on improving temperature uniformity.

[0065] Therefore, the first aspect of this utility model provides a heat exchanger, particularly a parallel flow heat exchanger, which is suitable for vehicle air conditioning systems and can meet the requirements of high working pressure (≤37MPa). Its application scenarios include, but are not limited to, R744 refrigeration systems.

[0066] This heat exchanger can be used, for example, as an interior air cooler, primarily in automotive heat pump air conditioning systems that use carbon dioxide as a refrigerant. Applying this heat exchanger to automotive heat pump air conditioning systems can solve the following problem: existing carbon dioxide interior air coolers exhibit poor temperature uniformity during actual operation, resulting in uneven outlet air temperature and affecting the heating effect of the passenger compartment. The specific structure of the heat exchanger will be described in detail below.

[0067] In terms of overall structure, refer to Figure 1 and Figure 2 As shown, the heat exchanger includes a first water chamber 1 and a second water chamber 2 arranged opposite to each other, and multiple sets of flat tubes 3 located between the first water chamber 1 and the second water chamber 2. The first water chamber 1 and the second water chamber 2 both extend along a first direction, and the multiple sets of flat tubes 3 are arranged sequentially along the first direction, with each set of flat tubes 3 comprising multiple flat tubes 3 stacked along the first direction.

[0068] For example, in this embodiment, the multiple flat tubes 3 are divided into two groups arranged sequentially along the first direction. It should be understood that, in addition to dividing the multiple flat tubes 3 into two groups, they can also be divided into three groups, four groups, etc.

[0069] In practical implementation, the first water chamber 1 is divided into an inlet chamber and an outlet chamber. A portion of each set of flat tubes 3 is connected to the inlet chamber, and another portion of each set of flat tubes 3 is connected to the outlet chamber. Each set of flat tubes 3 is also connected to the second water chamber 2. Through the above structural arrangement, multiple sets of flat tubes 3 are connected in parallel, and the heat exchange fluid entering the inlet chamber is diverted to each set of flat tubes 3, while the heat exchange fluid flowing through each set of flat tubes 3 can converge to the outlet chamber and then flow out.

[0070] In this embodiment, the heat exchanger divides multiple flat tubes 3 into multiple groups. Each group of flat tubes 3 is connected to the inlet chamber and the outlet chamber in the first water chamber 1. A portion of each group of flat tubes 3 is connected to the inlet chamber, and another portion of each group of flat tubes 3 is connected to the outlet chamber. Each group of flat tubes 3 is connected through the second water chamber 2, so that multiple groups of flat tubes 3 are arranged in parallel to form a multi-process parallel configuration. This can effectively reduce the temperature difference between the inlet and outlet, improve the temperature consistency of each flat tube 3, and enhance the heat exchange uniformity.

[0071] Still refer to Figure 2 As shown, in some exemplary embodiments, each set of flat tubes 3 includes two rows arranged side by side along a second direction, which is perpendicular to the first direction.

[0072] In specific implementation, there are multiple inlet chambers corresponding one-to-one with each group of flat tubes 3, and multiple outlet chambers corresponding one-to-one with each group of flat tubes 3. In this embodiment, since there are two groups of flat tubes 3, there are two inlet chambers and two outlet chambers in the first water chamber 1.

[0073] In some embodiments, in each group of flat tubes 3, one row of flat tubes 3 is connected to the inlet chamber corresponding to that group of flat tubes 3, and the other row of flat tubes 3 is connected to the outlet chamber corresponding to that group of flat tubes 3. For example, in this embodiment, all flat tubes 3 are divided into two groups along a first direction, each group including two rows of flat tubes 3, each row of flat tubes 3 including multiple flat tubes 3, and the multiple flat tubes 3 in each row of each group are arranged along the first direction.

[0074] Taking the inlet chamber and its corresponding flat tube 3 as an example, in the first direction, the inlet chamber is located above the corresponding flat tube 3, and the inlet chamber is connected to the portion of the flat tube 3 below the corresponding position. The outlet chamber is also located above the corresponding flat tube 3. In a preferred example, the inlet chamber and the outlet chamber are symmetrical about the centerline of the heat exchanger in the second direction, and the outlet chamber is connected to the portion of the flat tube 3 below the corresponding position.

[0075] In the above structure, each set of flat tubes 3 is arranged in two rows, which facilitates the connection between each set of flat tubes 3 and the inlet and outlet chambers respectively. This ensures that each inlet and outlet chamber corresponds one-to-one with each set of flat tubes 3, which is convenient for overall arrangement and allows the inlet and outlet chambers to connect with the corresponding sets of flat tubes 3 respectively. The structure of the inlet and outlet chambers will be described in detail below.

[0076] Depend on Figure 2 Combination Figures 3 to 6 As shown, in some exemplary embodiments, the first water chamber 1 includes a first cover plate 101, a first distribution plate 102, a first reversing plate 103, and a first main plate 104 stacked and connected on one side. It should be noted that, along the length direction of the flat tube 3, the first cover plate 101, the first distribution plate 102, the first reversing plate 103, and the first main plate 104 are arranged in sequence and welded together between any two adjacent ones, thereby forming the first water chamber 1 in this embodiment.

[0077] Each inlet chamber includes an inlet cavity K1 formed between the first cover plate 101 and the first distribution plate 102, and a distribution channel 10A provided on the first distribution plate 102 and the first reversing plate 103. The inlet cavity K1 and the distribution channel 10A both extend along a first direction, and each set of flat tubes 3 and the corresponding inlet chamber are configured such that a portion of one row of flat tubes 3 communicates with the inlet cavity K1 through the distribution channel 10A.

[0078] In the above structure, the first water chamber 1 includes a first cover plate 101, a first distribution plate 102, a first reversing plate 103 and a first main plate 104, which facilitates the formation of the liquid inlet chamber K1, the distribution channel 10A, the collection channel 10B and the reversing channel 1031, thereby facilitating the formation of a structure in which multiple sets of flat tubes 3 are connected in parallel.

[0079] In addition, each liquid inlet chamber includes a liquid inlet cavity K1 and a distribution channel 10A, so that the liquid inlet cavity K1 extends along the first direction to facilitate the supply of heat exchange fluid to multiple flat tubes 3, and the distribution channel 10A extends along the first direction to facilitate corresponding communication with multiple flat tubes 3. The specifics will be described in detail below.

[0080] In some of the exemplary implementations, reference is still made to Figure 2 Combination Figures 3 to 6As shown, each outlet chamber includes an outlet cavity K2 formed between the first cover plate 101 and the first distribution plate 102, and a collection channel 10B provided on the first distribution plate 102 and the first reversing plate 103. Specifically, the outlet cavity K2 and the collection channel 10B both extend along a first direction, and each set of flat tubes 3 and the corresponding outlet chamber are configured such that a portion of another row of flat tubes 3 is connected to the outlet cavity K2 through the collection channel 10B.

[0081] In the above structure, the liquid outlet chamber includes a liquid outlet cavity K2 and a collection channel 10B. The liquid outlet cavity K2 extends along the first direction to facilitate the collection of heat exchange fluid in the flat tube 3, while the collection channel 10B extends along the first direction to facilitate the collection of heat exchange fluid in multiple flat tubes 3 together.

[0082] To improve the heat exchange effect, the first reversing plate 103 is provided with reversing channels 1031. Multiple reversing channels 1031 are arranged at intervals along the first direction, and each group of flat tubes 3 is provided with a reversing channel 1031. In each group of two rows of flat tubes 3, two flat tubes 3 located at the same stack position are connected through the reversing channel 1031. This increases the number of flow paths, so that the heat exchange fluid entering the same liquid inlet chamber K1 can flow through more flat tubes 3, making the heat exchange more complete, the heat exchange performance higher, and facilitating the overall arrangement of the heat exchanger.

[0083] For example, in this embodiment, two liquid inlet chambers K1 and two liquid outlet chambers K2 are defined between the first cover plate 101 and the first distribution plate 102, as shown in the reference. Figure 2 As shown, the two inlet chambers K1 and the two outlet chambers K2 extend along the first direction, and the lengths of the two inlet chambers K1 and the two outlet chambers K2 in the first direction are close to the length of the first water chamber 1. Thus, when processing the first cover plate 101, it is only necessary to process the first cover plate 101 into a structure with a wavy cross-section, which is relatively convenient.

[0084] For details regarding the structure of the first cover plate 101, please refer to [reference needed]. Figure 7 The structure of the second cover plate 201 shown is that the first cover plate 101 is different from the second cover plate 201 except that it has one less middle mounting hole 2011. The two mounting holes 2011 at both ends of the first cover plate 101 are used to install the partition 204 described below, so as to seal the two ends of each liquid inlet chamber K1 and each liquid outlet chamber K2.

[0085] The structure of the first distribution plate 102 can be as follows: Figure 4 As shown, there are two distribution channels 10A, which are respectively connected to the two inlet chambers K1, and the two distribution channels 10A are used to distribute heat exchange fluid into the two sets of flat tubes 3 respectively. There are two collection channels 10B, which are respectively connected to the two outlet chambers K2, and the two collection channels 10B are used to collect the heat exchange fluid in the two sets of flat tubes 3.

[0086] Figure 5 The structure of the first commutator 103 is shown. The distribution channel 10A on the first commutator 103 is connected to the distribution channel 10A on the first distribution plate 102 in a one-to-one correspondence, and the collection channel 10B on the first commutator 103 is connected to the collection channel 10B on the first distribution plate 102 in a one-to-one correspondence.

[0087] Furthermore, the reversing channels 1031 on the first reversing plate 103 include, in the first direction, a plurality of reversing channels 1031 located in the middle of the first reversing plate 103, and a plurality of reversing channels 1031 respectively arranged near both ends of the first reversing plate 103. Among them, with the center line in the length direction of the first reversing plate 103 as the boundary, the reversing channels 1031 on both sides of the center line are used to reversing the heat exchange fluid in the two sets of flat tubes 3.

[0088] Each reversing channel 1031 extends along the second direction, and along the first direction, the spacing between any two reversing channels 1031 at any adjacent position is the same as the spacing between any two adjacent flat tubes 3, which facilitates connecting two flat tubes 3 at the same stack position in the two rows of flat tubes 3.

[0089] In some exemplary embodiments, the first water chamber 1 further includes a first channel plate 105 located between the first reversing plate 103 and the first main board 104. The structure of the first main board 104 is shown in reference to... Figure 3 As shown, the first channel plate 105 will be referenced Figure 6 As shown, the first main board 104 is provided with a plurality of first openings 1041, each of which is used to insert a flat tube 3, and the edge of each first opening 1041 is provided with a first flange 1042 that bends toward the flat tube 3. The first channel plate 105 is provided with a first clearance hole 1051 that avoids each first flange 1042, that is, the first opening 1041 and the first clearance hole 1051 correspond one to one.

[0090] The first opening 1041 provided on the first main board 104 facilitates the positioning of each flat tube 3 and the welding connection between the flat tube 3 and the first main board 104. The first flange 1042 provided on the edge of each first opening 1041 helps to improve the stability and reliability of the positioning of the flat tube 3. The first clearance hole 1051 provided facilitates the insertion of the end of the flat tube 3 into the first clearance hole 1051 for welding with the first main board 104, which helps to prevent the solder from blocking the internal channel of the flat tube 3, and at the same time can increase the insertion depth of the flat tube 3, which is beneficial for assembly and improves the stability and reliability of the structure.

[0091] In some of the exemplary implementations, for example Figure 3As shown, the first motherboard 104 has third flanges 1043 on both sides in the second direction, and the first channel plate 105, the first reversing plate 103, the first distribution plate 102 and the first cover plate 101 are sequentially welded and fixed between the third flanges 1043 on both sides.

[0092] The third flange 1043 is folded to the side facing away from each flat tube 3, which can play a positioning role in the welding process of the first water chamber 1, thereby facilitating the welding of the first channel plate 105, the first reversing plate 103, the first distribution plate 102, the first cover plate 101 and the first main plate 104 together without the need for external tooling, which helps to improve welding efficiency.

[0093] In some examples, such as Figure 3 As shown, multiple first notches 10431 are provided on the side of the third flange 1043 away from the flat tube 3. The multiple first notches 10431 are arranged sequentially at intervals along the first direction, which has a good weight reduction effect.

[0094] Reference Figure 1 and Figure 2 As shown, in some exemplary embodiments, one end of the first water chamber 1 is provided with a connector 4, and the connector 4 is provided with an inlet channel 401 and an outlet channel 402. The first water chamber 1 is provided with a first connection port 10C that connects the inlet channel 401 to each inlet chamber, and the first water chamber 1 is also provided with a second connection port 10D that connects the outlet chamber to each outlet channel 402.

[0095] In some examples, the first connection port 10C connected to the liquid inlet chamber near the adapter 4 has the smallest connection area. That is, the connection area of ​​the first connection port 10C connected to the liquid inlet chamber near the adapter 4 is greater than the connection area of ​​the first connection port 10C connected to the liquid inlet chamber far from the adapter 4.

[0096] For example, in some examples, the first distribution plate 102, the first reversing plate 103 and the first channel plate 105 are all provided with a first connecting port 10C. The first connecting ports 10C are arranged to run through these three, and the number of first connecting ports 10C corresponds one-to-one with the number of liquid inlet chambers K1. Each liquid inlet chamber K1 is connected to the corresponding first connecting port 10C.

[0097] The adapter 4 has upward-folded fifth flanges on both sides. The adapter 4 is installed at one end of the first water chamber 1, specifically by welding. The adapter 4 and each flat tube 3 are located on the same side of the first water chamber 1. The ratio of the communication area of ​​the first communication port 10C that communicates with the liquid inlet chamber near the adapter 4 and the first communication port 10C that communicates with the liquid outlet chamber away from the adapter 4 is between 1:2 and 1:4, for example, it can be 1:2, 1:3, 1:4, etc., to improve the temperature uniformity among the flat tubes 3.

[0098] In some exemplary embodiments, the first water chamber 1 is provided with a second connecting port 10D that connects the outlet to each outlet channel 402. Among the second connecting ports 10D, the connecting port 10D that connects to the outlet chamber closest to the adapter 4 has the smallest connecting area. That is, the connecting area of ​​the second connecting port 10D that connects to the outlet chamber closest to the adapter 4 is greater than the connecting area of ​​the second connecting port 10D that connects to the outlet chamber furthest from the adapter 4.

[0099] For example, in some examples, the first distribution plate 102, the first reversing plate 103 and the first channel plate 105 are all provided with a second connecting port 10D. The second connecting ports 10D are arranged to pass through these three, and the number of second connecting ports 10D corresponds one-to-one with the number of liquid outlet chambers K2. Each liquid outlet chamber K2 is connected to the corresponding second connecting port 10D.

[0100] The ratio of the communication area of ​​the second communication port 10D connected to the liquid outlet chamber near the adapter 4 and the second communication port 10D connected to the liquid outlet chamber far from the adapter 4 is between 1:2 and 1:4, for example, it can be 1:2, 1:3, 1:4, etc., which is also conducive to improving the temperature uniformity among the flat tubes 3.

[0101] In general, limiting the communication area of ​​the first communication port 10C connected to the liquid inlet chamber near the adapter 4 to be greater than the communication area of ​​the first communication port 10C connected to the liquid inlet chamber far from the adapter 4, and limiting the communication area of ​​the second communication port 10D connected to the liquid outlet chamber near the adapter 4 to be greater than the communication area of ​​the second communication port 10D connected to the liquid outlet chamber far from the adapter 4, can both enable the flow rate of the heat exchange fluid to be better distributed, which is conducive to improving the heat exchange effect of the heat exchanger and effectively improving the temperature uniformity among the flat tubes 3.

[0102] In some of these exemplary implementations, reference is still made to... Figure 1 and Figure 2 As shown, the second water chamber 2 includes a second cover plate 201 and a second main plate 202 connected together, and a second channel plate 203 located between the second cover plate 201 and the second main plate 202.

[0103] In some examples, the structure of the second cover plate 201 is as follows: Figure 7 As shown, the structure of the second motherboard 202 is as follows: Figure 3 As shown, the structure of the second channel plate 203 is referenced. Figure 2As shown, the second main board 202 is provided with a plurality of second openings 2021, each of which is used to insert the flat tube 3, and the edge of each second opening 2021 is provided with a second flange 2022 that bends toward the flat tube 3. The second channel plate 203 is provided with a second clearance hole 2031 that makes way for each second flange 2022, that is, the second opening 2021 and the second clearance hole 2031 correspond one-to-one.

[0104] In this example, the second water chamber 2 includes a second cover plate 201, a second main plate 202, and a second channel plate 203, facilitating the arrangement of the following connecting sub-cavities 20A1. The second opening 2021 facilitates the positioning of each flat tube 3 and allows for welding of the flat tube 3 to the second main plate 202. The second flange 2022 at the edge of each second opening 2021 improves the stability and reliability of the flat tube 3 positioning. The second clearance hole 2031 facilitates the insertion of the end of the flat tube 3 into the second clearance hole 2031 for welding to the second main plate 202, preventing solder from clogging the channel inside the flat tube 3, increasing the insertion depth of the flat tube 3, facilitating assembly, and improving the stability and reliability of the structure.

[0105] In some of these exemplary implementations, reference continues to be made to... Figure 2 As shown, the second water chamber 2 also includes a partition 204. The cavity between the second cover plate 201 and the second channel plate 203 is divided into multiple independent second sub-cavities 20A by the partition 204. The multiple second sub-cavities 20A are arranged one-to-one with each group of flat tubes 3, and each second sub-cavity 20A is divided into multiple connected sub-cavities 20A1 arranged side by side. In each group of flat tubes 3, each row of flat tubes 3 is provided with two connected sub-cavities 20A1. Each connected sub-cavity 20A1 extends along the first direction and connects to each flat tube 3 in the corresponding row.

[0106] It should be noted that the second sub-cavities 20A correspond one-to-one with each group of flat tubes 3, facilitating communication between multiple flat tubes 3 in each group through their corresponding second sub-cavities 20A. The connecting sub-cavities 20A1 extend along the first direction, allowing for simultaneous communication between multiple flat tubes 3. The partitions 204 effectively prevent internal leakage within each water chamber, thus preventing interference with core heat exchange, and also prevent communication between the first water chamber 1 and the second water chamber 2 and the outside, thereby reducing the risk of leakage of heat exchange fluids such as refrigerant.

[0107] In some examples, three partitions 204 are provided, and two second sub-cavities 20A are provided, with each second sub-cavity 20A corresponding to one of the two sets of flat tubes 3. Each second sub-cavity 20A is divided into four connecting sub-cavities 20A1, which extend along the first direction. Each row of flat tubes 3 has two connecting sub-cavities 20A1, with one connecting sub-cavity 20A1 connecting the holes in half of the corresponding row of flat tubes 3 in the second direction, and the other connecting sub-cavity 20A1 connecting the holes in the other half of the corresponding row of flat tubes 3 in the second direction.

[0108] In some exemplary embodiments, the second main board 202 has fourth flanges 2023 on both sides in the second direction, and the second channel plate 203 and the second cover plate 201 are sequentially welded and fixed between the fourth flanges 2023 on both sides. The fourth flanges 2023 provided here can play a positioning role during the welding process of the second water chamber 2, which facilitates the rapid welding of the second channel plate 203, the second cover plate 201 and the second main board 202 together without the need for external tooling, thereby improving welding efficiency.

[0109] In some examples, such as Figure 2 As shown, multiple second notches 20231 are provided on the side of the fourth flange 2023 away from the flat tube 3. The multiple second notches 20231 are arranged sequentially at intervals along the first direction, which has a good weight reduction effect.

[0110] Finally, it should be noted that a gap S is provided between any two adjacent flat tubes 3, and fins are provided within any gap S. The specific structure and installation method of the fins can refer to existing technologies. By setting fins, the heat exchange performance of this heat exchanger can be improved.

[0111] It should be noted that the fin structure can, for example, adopt existing folded aluminum strip fins with windowed structures. These are aluminum foils with windowed structures cut by a tool and then folded up, which are key heat exchange components. The fins and flat tube 3 are in close contact, exchanging heat with the refrigerant inside the flat tube 3 on the one hand, and with the coolant on the other, thereby realizing the heat transfer between the refrigerant and the coolant.

[0112] In this embodiment, the heat exchanger redistributes the refrigerant flow of the indoor air cooler by adding a first distribution plate 102 to the first water chamber 1, thereby changing the traditional four-six flow into multiple parallel four-six flow, thus ensuring the temperature uniformity of the indoor air cooler.

[0113] The external heat exchange fluid can flow into the first water chamber 1 through the liquid inlet channel 401 in the adapter 4. The heat exchange fluid is distributed through the liquid inlet chamber K1 and the distribution channel 10A in the first water chamber 1. Then, it flows back to the collection channel 10B in the first water chamber 1 through the flat tube 3 and the second water chamber 2, and then flows out through the liquid outlet chamber K2 and the liquid outlet channel 402 in the adapter 4.

[0114] When the refrigerant flows through the flat tube 3, it releases heat, which raises the temperature of the fins that are in close contact with the flat tube 3. When the low-temperature air passes through the high-temperature fins, the two exchange heat, which raises the air temperature, thus achieving the heating effect of the heat pump air conditioner.

[0115] The heat exchanger process is designed with multiple four-pass parallel flows. For the specific process structure, please refer to [reference needed]. Figure 8 As shown, the refrigerant enters the first water chamber 1 and is first divided into two zones, namely the first cover plate 101 and the first distribution plate 102. Each zone has a 2×4P flow path (e.g., ...). Figure 8 (The structure shown on the left side of the diagram) is named a, b, c, and d respectively (each sub-process is named a-①, a-②, a-③, and a-④ according to the refrigerant flow sequence, such as...). Figure 8 (Schematic diagram of the structure on the right side of the middle section).

[0116] The arrows indicate the direction of refrigerant flow; red indicates inflow, blue indicates outflow, and circles represent refrigerant junctions where the direction needs to be changed.

[0117] In some exemplary embodiments, the number of flat tubes 3 within each process is allocated according to the following rules. In Tables 1 and 2, the number of flat tubes in a single core layer refers to the number of flat tubes 3 in any row. The heat exchanger has two rows of flat tubes 3, and the two rows have the same number of flat tubes 3.

[0118] Since Zone 1 is farther from the inlet / outlet adapter 4 than Zone 2, the number of flat tubes 3 added is prioritized to Zone 1 to ensure even flow distribution. In each sub-zone, the number of flat tubes 3 is the same for Process ① and Process ④, and the number of flat tubes 3 is the same for Process ② and Process ③.

[0119] If N is even, then calculate according to Table 1.

[0120] Table 1:

[0121]

[0122] If N is odd, then calculate according to Table 2.

[0123] Table 2:

[0124]

[0125] This parallel multi-process structure design can be used not only for multiple four-process stacks, but also for multiple six-processes, multiple 4X processes, etc., to further improve and enhance the temperature uniformity of the sample surface according to specific sample requirements. A schematic diagram of a four-process structure can be found for example... Figure 9 As shown in the image.

[0126] The flat tube 3 mentioned above can be any existing porous microchannel flat tube 3. For example, in one example, the flat tube 3 has 6 flow channels. The length direction of each flow channel extends along the length direction of the flat tube 3, and the flow channels are arranged in a row along the second direction. It should be understood that the number of flow channels in the flat tube 3 can also be set to other numbers, such as 4, 8, etc.

[0127] In some examples, along the first direction, the heat exchange type has side plates 5 at both ends, which can be used to fix the outer fins at both ends. The two ends of each side plate 5 are welded to the first main plate 104 and the second main plate 202 respectively.

[0128] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A heat exchanger suitable for vehicle air conditioning systems, characterized in that: It includes a first water chamber (1) and a second water chamber (2) arranged opposite to each other, and multiple sets of flat tubes (3) located between the first water chamber (1) and the second water chamber (2); The first water chamber (1) and the second water chamber (2) both extend along the first direction, and multiple sets of flat tubes (3) are arranged sequentially along the first direction. Each set of flat tubes (3) includes multiple flat tubes (3) stacked along the first direction. The first water chamber (1) is divided into an inlet chamber and an outlet chamber. A portion of each set of flat tubes (3) is connected to the inlet chamber, and another portion of each set of flat tubes (3) is connected to the outlet chamber. Each set of flat tubes (3) is also connected to the second water chamber (2). The heat exchange fluid entering the inlet chamber is diverted to each set of flat tubes (3), and the heat exchange fluid flowing through each set of flat tubes (3) can converge to the outlet chamber and then flow out.

2. The heat exchanger according to claim 1, characterized in that: Each set of flat tubes (3) includes two rows arranged side by side along a second direction, which is perpendicular to the first direction; The liquid inlet chamber is a plurality of chambers corresponding one-to-one with each of the flat tubes (3) in each group; the liquid outlet chamber is a plurality of chambers corresponding one-to-one with each of the flat tubes (3) in each group. In each group of flat tubes (3), one row of flat tubes (3) is connected to the liquid inlet chamber corresponding to the flat tubes (3) in that group, and the other row of flat tubes (3) is connected to the liquid outlet chamber corresponding to the flat tubes (3) in that group.

3. The heat exchanger according to claim 2, characterized in that: The first water chamber (1) includes a first cover plate (101), a first distribution plate (102), a first reversing plate (103), and a first main plate (104) that are stacked and connected in sequence; Each of the liquid inlet chambers includes a liquid inlet cavity (K1) formed between the first cover plate (101) and the first distribution plate (102), and a distribution channel (10A) provided on the first distribution plate (102) and the first reversing plate (103); Both the inlet chamber (K1) and the distribution channel (10A) extend along the first direction, and each set of flat tubes (3) and the corresponding inlet chamber are configured such that a portion of one row of flat tubes (3) is connected to the inlet chamber (K1) through the distribution channel (10A).

4. The heat exchanger according to claim 3, characterized in that: Each of the liquid outlet chambers includes a liquid outlet cavity (K2) formed between the first cover plate (101) and the first distribution plate (102), and a collection channel (10B) provided on the first distribution plate (102) and the first reversing plate (103); The liquid outlet chamber (K2) and the collecting channel (10B) both extend along the first direction, and each set of flat tubes (3) and the corresponding liquid outlet chamber are configured such that a portion of another row of flat tubes (3) is connected to the liquid outlet chamber (K2) through the collecting channel (10B); The first reversing plate (103) is provided with a reversing channel (1031). The reversing channel (1031) consists of multiple channels spaced apart along the first direction. Each group of flat tubes (3) is provided with a reversing channel (1031). In each group, two flat tubes (3) located at the same stack position are connected through the reversing channel (1031).

5. The heat exchanger according to claim 3, characterized in that: The first water chamber (1) further includes a first channel plate (105) located between the first reversing plate (103) and the first main board (104); The first main board (104) is provided with a plurality of first openings (1041), each of the first openings (1041) is used to insert the flat tube (3), and the edge of each of the first openings (1041) is provided with a first flange (1042) that bends toward the flat tube (3), and the first channel plate (105) is provided with a first clearance hole (1051) that avoids each of the first flanges (1042).

6. The heat exchanger according to claim 5, characterized in that: The first motherboard (104) has third flanges (1043) on both sides in the second direction, and the first channel plate (105), the first reversing plate (103), the first distribution plate (102) and the first cover plate (101) are sequentially welded and fixed between the third flanges (1043) on both sides.

7. The heat exchanger according to claim 3, characterized in that: One end of the first water chamber (1) is provided with a connector (4), and the connector (4) is provided with an inlet channel (401) and an outlet channel (402); The first water chamber (1) is provided with a first communication port (10C) that connects the liquid inlet channel (401) to each of the liquid inlet chambers, and the first water chamber (1) is provided with a second communication port (10D) that connects the liquid outlet chamber to each of the liquid outlet channels (402); Among them, the first communication port (10C) that communicates with the liquid inlet chamber near the adapter (4) has the smallest communication area, and / or, among the second communication ports (10D) that communicate with the liquid outlet chamber near the adapter (4) has the smallest communication area.

8. The heat exchanger according to any one of claims 3-7, characterized in that: The second water chamber (2) includes a second cover plate (201) and a second main plate (202) connected together, and a second channel plate (203) located between the second cover plate (201) and the second main plate (202); The second main board (202) is provided with a plurality of second openings (2021), each of which is used to insert the flat tube (3), and the edge of each of the second openings (2021) is provided with a second flange (2022) that bends toward the flat tube (3). The second channel plate (203) is provided with a second clearance hole (2031) that makes way for each of the second flanges (2022).

9. The heat exchanger according to claim 8, characterized in that: The second water chamber (2) further includes a partition (204), and the cavity between the second cover plate (201) and the second channel plate (203) is divided by the partition (204) into a plurality of independent second sub-cavities (20A); Multiple second sub-cavities (20A) are provided in a one-to-one correspondence with each group of flat tubes (3), and each second sub-cavity (20A) is divided into multiple connected sub-cavities (20A1) arranged side by side; In each group of flat tubes (3), each row of flat tubes (3) is provided with two connecting sub-cavities (20A1). Each connecting sub-cavity (20A1) extends along the first direction and connects to each flat tube (3) in the corresponding row.

10. The heat exchanger according to claim 8, characterized in that: The second motherboard (202) has a fourth flange (2023) on both sides in the second direction, and the second channel plate (203) and the second cover plate (201) are welded and fixed between the fourth flanges (2023) on both sides in sequence.

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