Integrated design structure of core assembly of two-stage heat exchanger

Abstract

The utility model discloses a two-stage heat exchanger core assembly integrated design structure, which is internally provided with a cold medium flow channel and two hot medium flow channels, and comprises a primary heat dissipation core assembly and a secondary heat dissipation core assembly, the primary heat dissipation core assembly and the secondary heat dissipation core assembly are each of a plate-fin type reverse cross flow heat exchange structure, the purpose that one path of cold medium cools two paths of heat media in different flow channels at the same time is achieved, and the heat exchanger has the advantages of being small in occupied space, light in weight, high in heat exchange efficiency, high in integration degree and the like.

Description

Technical Field

[0001] This utility model belongs to the field of aircraft cooling system technology, specifically relating to an integrated design structure of a two-stage heat exchanger core assembly. Background Technology

[0002] The two-stage heat exchanger core assembly is a cooling accessory for aircraft systems. The ram air introduced from outside the aircraft exchanges heat with the high-temperature hot fluid in the two-stage heat exchanger core assembly, reaching a certain temperature for use by the aircraft system. This ensures that the aircraft system meets its heat exchange requirements during flight. Because different aircraft systems have different requirements for heat exchange capacity, space, and weight of the radiator, each system must meet the functional performance requirements of the ram air and high-temperature hot fluid.

[0003] In existing technologies, different types of radiators are often used in the same system to meet different cooling needs. Currently, these radiators for different purposes are mostly arranged in a front-to-back manner or are separate radiators, which occupy a large amount of system space and are not conducive to the requirements of system weight reduction.

[0004] In a front-to-back parallel structure, these heat sinks with different purposes rely on the flow of cooling air to transfer and dissipate heat during the cooling process. However, variations in the structure of each heat sink reduce the cooling capacity of the downstream heat sink, resulting in lower cooling efficiency. Furthermore, the arrangement of multiple heat sinks front-to-back leads to a thick core, occupying a large volume, and the increased thickness also increases flow resistance, significantly reducing cooling effectiveness. For an independent structure, when the host needs to accommodate more than three types of heat sinks simultaneously, a large piping structure is required, resulting in significant losses due to system flow resistance. Moreover, space constraints make it difficult to implement, leading to low heat sink integration and making it unsuitable for the miniaturization requirements of heat sinks and the system. Summary of the Invention

[0005] This utility model aims to propose an integrated design structure for a two-stage heat exchanger core assembly to solve the problems of large system space occupation, excessive weight, and low heat exchange efficiency of radiators in existing systems. It improves the compactness of radiators, increases product integration, reduces the number of parts, reduces the overall volume of radiators, reduces system space occupation, reduces product weight, improves heat exchange efficiency, and meets the miniaturization requirements of system radiators.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An integrated design structure for a two-stage heat exchanger core assembly includes spaced-apart cold-side channels and hot-side channels.

[0008] The cold edge flow channel is a single-pass air flow channel;

[0009] The hot-side flow channel includes a single-pass hot medium flow channel and a double-pass hot medium flow channel. The single-pass hot medium flow channel and the double-pass hot medium flow channel are independent of each other, but share the same single-pass air flow channel. The single-pass hot medium flow channel has a plate-fin structure and forms a counter-crossflow heat exchange structure with the single-pass air flow channel. The double-pass hot medium flow channel has a plate-fin structure with baffle fins and forms a counter-crossflow heat exchange structure with the single-pass air flow channel.

[0010] As one solution:

[0011] The multiple single-flow air channels and the multiple single-flow heat transfer medium channels constitute a primary heat dissipation core assembly.

[0012] The multiple single-flow air channels and the multiple dual-flow heat transfer medium channels constitute a secondary heat dissipation core assembly.

[0013] The primary heat dissipation core assembly and the secondary heat dissipation core assembly are vacuum brazed together as one unit.

[0014] As one solution:

[0015] The hot edge outlet of the primary heat dissipation core assembly is on the same side as the hot edge outlet and hot edge inlet of the secondary heat dissipation core assembly.

[0016] Alternatively, the hot edge inlet of the primary heat dissipation core assembly and the hot edge outlet and hot edge inlet of the secondary heat dissipation core assembly are on the same side.

[0017] As one option, the primary heat dissipation core assembly and the secondary heat dissipation core assembly are arranged sequentially along a single-flow air channel from the cold side inlet to the cold side outlet.

[0018] Alternatively, the fin structure in the single-flow heat medium channel may be triangular, corrugated triangular, cut triangular, serrated, wavy, straight, trapezoidal, rolled corrugated, or perforated straight-through fins.

[0019] Alternatively, the fin structure in the dual-flow heat medium channel can be triangular, corrugated triangular, cut triangular, serrated, wavy, straight, trapezoidal, rolled corrugated, or perforated straight-through fins.

[0020] Alternatively, the single-flow air channel is provided with fins, and the fin structure is triangular, corrugated triangular, cut triangular, serrated, wavy, straight, trapezoidal, rolled corrugated, or perforated straight-through fin.

[0021] As one solution:

[0022] The primary heat dissipation core assembly mainly consists of a side plate, a brazing plate, a cold edge seal, cold edge fins, a primary heat dissipation core assembly hot edge seal, and a primary heat dissipation core assembly hot edge fins.

[0023] The secondary heat dissipation core assembly mainly consists of a side plate, a brazing plate, a cold edge seal, cold edge fins, a middle seal of the secondary heat dissipation core assembly, a hot edge seal of the secondary heat dissipation core assembly, hot edge fins of the first primary heat dissipation core assembly, and hot edge fins of the second secondary heat dissipation core assembly.

[0024] Multiple brazing plates are arranged parallel and spaced apart between two side plates, forming spaced cold-edge channels and hot-edge channels. The cold-edge channels are filled with cold-edge fins, and each end of the cold-edge fin is fitted with a cold-edge seal. The hot-edge channels are divided into two parts: the part corresponding to the primary heat dissipation core assembly is filled with primary heat dissipation core assembly hot-edge fins, and each end of the primary heat dissipation core assembly hot-edge fins is fitted with a primary heat dissipation core assembly hot-edge seal; the part corresponding to the secondary heat dissipation core assembly is filled with two primary heat dissipation core assembly hot-edge fins and one secondary heat dissipation core assembly hot-edge fin. The two primary heat dissipation core assembly hot-edge fins are separated by a secondary heat dissipation core assembly intermediate seal and connected by a reversing connection through the secondary heat dissipation core assembly hot-edge fins. One of the primary heat dissipation core assembly hot-edge fins is fitted with a secondary heat dissipation core assembly hot-edge seal at the end furthest from the primary heat dissipation core assembly.

[0025] Compared with the prior art, the design of this utility model has the following characteristics:

[0026] (1) In this utility model, the primary heat dissipation core assembly and the secondary heat dissipation core assembly are two components. The primary heat dissipation core assembly and the secondary heat dissipation core assembly are connected by vacuum brazing to form a rigid body structure, making the structure of the entire two-stage heat exchanger core assembly more compact, lighter, with fewer parts, smaller system space, and higher reliability.

[0027] (2) In this utility model, the primary heat dissipation core assembly and the secondary heat dissipation core assembly are arranged in series, and the heat medium flow channels of the primary heat dissipation core assembly and the secondary heat dissipation core assembly are arranged in parallel, which makes the structure more compact and more conducive to the miniaturization requirements of the heat sink.

[0028] (3) In this utility model, the radiator adopts baffle fins and eliminates the double flow baffle chamber, making the radiator structure more compact and lighter.

[0029] (4) In this utility model, the heat exchange structure of the heat exchanger fins is triangular, wavy triangular, cut triangular, sawtooth, wave-shaped, straight, trapezoidal, rolling wave, or punched straight-through, which makes the core structure more varied and the heat transfer efficiency higher.

[0030] (5) In this utility model, the radiator fins are made of metal materials such as aluminum alloy, copper alloy, titanium alloy, stainless steel alloy, and high temperature alloy, which makes the core heat transfer efficiency higher and the welding process better. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of a two-stage heat exchanger core assembly;

[0032] Figure 2 for Figure 1 Schematic diagram of section AA;

[0033] Figure 3 A schematic diagram of the primary core assembly.

[0034] Figure 4 This is a schematic diagram of the secondary core assembly.

[0035] Figure 5 A schematic diagram of the cold side flow channel of a two-stage heat exchanger core assembly;

[0036] Figure 6 for Figure 5 Schematic diagram of the BB section;

[0037] Figure 7 This is a schematic diagram of the operation of a two-stage heat exchanger core assembly.

[0038] Explanation of reference numerals: 1. Primary heat dissipation core assembly; 2. Secondary heat dissipation core assembly; 101. Side plate; 102. Brazing plate; 103. Cold edge seal; 104. Cold edge fin; 105. Primary heat dissipation core assembly hot edge seal; 106. Primary heat dissipation core assembly hot edge fin; 201. Secondary heat dissipation core assembly center seal; 202. Secondary heat dissipation core assembly hot edge seal; 203. First primary heat dissipation core assembly hot edge fin; 204. Secondary secondary heat dissipation core assembly hot edge fin. Detailed Implementation

[0039] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. However, it should not be construed that the scope of the subject matter of the present invention is limited to the following embodiments. Any modifications, substitutions and alterations made based on ordinary technical knowledge and conventional means in the art without departing from the above-described technical concept of the present invention are included within the scope of the present invention.

[0040] like Figure 1The diagram illustrates an integrated design structure for a two-stage heat exchanger core assembly, comprising a primary heat dissipation core assembly 1 with internal airflow and heat medium flow channels. The heat medium flow channel is a single-pass type, and the primary heat dissipation core assembly is a single-pass plate-fin reverse crossflow structure. A secondary heat dissipation core assembly 2 also has internal airflow and heat medium flow channels, with a dual-pass type. The secondary heat dissipation core assembly is a dual-pass plate-fin reverse crossflow structure. Baffle fins are used on the hot side of the secondary heat dissipation core assembly, eliminating the need for a dual-pass baffle chamber and improving product compactness. The primary heat dissipation core assembly 1 and the secondary heat dissipation core assembly 2 are connected in parallel via vacuum brazing. Both core assemblies share a single cold-side channel, but their hot-side channels are independent, meeting various operating requirements. This structure helps reduce the overall volume of the radiator / heat exchanger, occupying less system space, reducing weight, and achieving a more compact structure and high integration, thus achieving miniaturization.

[0041] exist Figure 2 In the diagram, arrow C represents the medium flow direction of the primary heat sink assembly 1, and arrows D and E represent the medium flow direction of the secondary heat sink assembly 2. Figure 3 , Figure 4 In the diagram, solid arrows indicate the flow direction of the heat transfer medium in the primary heat dissipation core assembly 1 and the secondary heat dissipation core assembly 2, respectively. Figure 6 In the diagram, the dashed arrows indicate the direction of airflow. Figure 7 In the diagram, arrow F represents the cold edge outlet, arrow G represents the cold edge inlet, arrow H represents the hot edge outlet of the primary heat dissipation core assembly 1, arrow I represents the hot edge inlet of the secondary heat dissipation core assembly 2, and arrow J represents the hot edge outlet of the secondary heat dissipation core assembly 2.

[0042] In this embodiment, the side plate 101, brazing plate 102, cold edge seal 103, cold edge fins 104, primary heat dissipation core assembly hot edge seal 105, and primary heat dissipation core assembly hot edge fins 106 are arranged in an alternating manner and connected by vacuum brazing to form a rigid body structure primary heat dissipation core assembly 1. Side plate 101, brazing plate 102, cold edge seal 103, cold edge fins 104, primary heat dissipation core assembly hot edge seal 105, secondary heat dissipation core assembly intermediate seal 201, secondary heat dissipation core assembly hot edge seal 202, primary heat dissipation core assembly hot edge fins 203 and secondary heat dissipation core assembly hot edge fins 204 are arranged alternately and connected by vacuum brazing to form a rigid body structure secondary heat dissipation core assembly 2. The primary heat dissipation core assembly 1 and the secondary heat dissipation core assembly 2 are separated by the primary heat dissipation core assembly hot edge seal 105 on one side of the primary heat dissipation core assembly 1 as an intermediate seal and are connected by vacuum brazing to form an integral rigid body structure, thereby improving the overall rigidity and heat exchange efficiency of the entire radiator.

[0043] The fins are the main body of the heat sink and are the key functional components of the product. The cold edge fins 104, the primary heat sink core assembly hot edge fins 106, the first-stage heat sink core assembly hot edge fins 203, and the second-stage heat sink core assembly hot edge fins 204 adopt a variety of structures with high heat transfer efficiency, such as triangular, corrugated triangular, cut triangular, sawtooth, wave, straight, trapezoidal, rolled corrugated, or punched straight-through structures. The fin materials are aluminum alloy, copper alloy, titanium alloy, stainless steel alloy, high-temperature alloy, etc., which have high heat transfer efficiency, good weldability, and high strength.

[0044] The working principle of this invention is as follows: When the aircraft is in flight, the secondary heat dissipation core assembly 2 uses ram air to initially cool the bleed air, while the primary heat dissipation core assembly 1 uses ram air to cool the high-temperature air at the compressor outlet. After the ram air enters from the cold air inlet, it first exchanges heat with the heat medium in the hot-side outlet channel of the secondary heat dissipation core assembly 2, then with the heat medium in the hot-side inlet channel of the secondary heat dissipation core assembly 2, and finally with the heat medium in the hot-side channel of the primary heat dissipation core assembly 1.

[0045] The integrated design structure of the two-stage heat exchanger core assembly for aircraft systems provided by this utility model ensures that the ram air introduced from outside the aircraft exchanges heat with the high-temperature hot fluid (heat medium) to reach a certain temperature and be used in the aircraft. The high-temperature hot fluid exchanges heat with the air to reach a certain temperature and is then used in various aircraft systems. This reduces the number of components in the aircraft system cooling accessories, reduces the installation space, and lightens the weight, thereby reducing the complexity of the aircraft system structure. The integrated design structure of the two-stage heat exchanger core assembly also reduces the quality failure rate of the aircraft system and improves the reliability of the aircraft system.

[0046] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the concept of the present utility model and using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present utility model.

Claims

1. An integrated design structure for a two-stage heat exchanger core assembly, comprising spaced-apart cold-side channels and hot-side channels, characterized in that: The cold edge flow channel is a single-pass air flow channel; The hot-side flow channel includes a single-pass hot medium flow channel and a double-pass hot medium flow channel. The single-pass hot medium flow channel and the double-pass hot medium flow channel are independent of each other, but share the same single-pass air flow channel. The single-pass hot medium flow channel has a plate-fin structure and forms a counter-crossflow heat exchange structure with the single-pass air flow channel. The double-pass hot medium flow channel has a plate-fin structure with baffle fins and forms a counter-crossflow heat exchange structure with the single-pass air flow channel.

2. The integrated design structure of a two-stage heat exchanger core assembly according to claim 1, characterized in that: The multiple single-flow air channels and the multiple single-flow heat medium channels constitute a primary heat dissipation core assembly (1); Multiple single-flow air channels and multiple dual-flow heat transfer medium channels constitute a secondary heat dissipation core assembly (2); The primary heat dissipation core assembly (1) and the secondary heat dissipation core assembly (2) are vacuum brazed together.

3. The integrated design structure of a two-stage heat exchanger core assembly according to claim 2, characterized in that: The hot edge outlet of the primary heat dissipation core assembly (1) is on the same side as the hot edge outlet and hot edge inlet of the secondary heat dissipation core assembly (2); Alternatively, the hot edge inlet of the primary heat dissipation core assembly (1) and the hot edge outlet and hot edge inlet of the secondary heat dissipation core assembly (2) are on the same side.

4. A two-stage heat exchanger core subassembly integrated design structure according to claim 2, characterized by: The primary heat dissipation core assembly (1) and the secondary heat dissipation core assembly (2) are arranged sequentially along the direction from the cold side inlet to the cold side outlet in a single-flow air channel.

5. A two-stage heat exchanger core subassembly integrated design structure according to claim 1, characterized by: The fin structure in the single-flow heat medium channel is triangular, corrugated triangular, cut triangular, serrated, wavy, straight, trapezoidal, rolled corrugated, or perforated straight-through fin.

6. A two-stage heat exchanger core subassembly integrated design structure according to claim 1, characterized by: The fin structure in the dual-flow heat medium channel is triangular, corrugated triangular, cut triangular, serrated, wavy, straight, trapezoidal, rolled corrugated, or perforated straight-through fin.

7. A two-stage heat exchanger core subassembly integrated design structure according to claim 1, characterized by: The single-flow air channel is equipped with fins, and the fin structure is triangular, corrugated triangular, cut triangular, sawtooth, wavy, straight, trapezoidal, rolled corrugated, or perforated straight fin.

8. The integrated design structure of a two-stage heat exchanger core assembly according to claim 2, characterized in that: The primary heat dissipation core assembly (1) is mainly composed of a side plate (101), a brazing plate (102), a cold edge seal (103), a cold edge fin (104), a primary heat dissipation core assembly hot edge seal (105), and a primary heat dissipation core assembly hot edge fin (106). The secondary heat dissipation core assembly (2) is mainly composed of a side plate (101), a brazing plate (102), a cold edge seal (103), cold edge fins (104), a secondary heat dissipation core assembly middle seal (201), a secondary heat dissipation core assembly hot edge seal (202), a primary heat dissipation core assembly hot edge fins (203), and a secondary heat dissipation core assembly hot edge fins (204). Multiple brazing plates (102) are arranged in parallel and spaced apart between two side plates (101), thereby forming spaced cold-edge channels and hot-edge channels. The cold-edge channels are filled with cold-edge fins (104), and each end of the cold-edge fin (104) is fitted with a cold-edge seal (103). The hot-edge channels are divided into two parts. The part corresponding to the primary heat dissipation core assembly (1) is filled with primary heat dissipation core assembly hot-edge fins (106), and each end of the primary heat dissipation core assembly hot-edge seal (105) is fitted with a primary heat dissipation core assembly hot-edge seal (105). The secondary heat sink core assembly (2) is filled with two primary heat sink core assembly hot edge fins (203) and one secondary heat sink core assembly hot edge fin (204). The two primary heat sink core assembly hot edge fins (203) are separated by a secondary heat sink core assembly intermediate seal (201) and connected by a secondary heat sink core assembly hot edge fin (204). One of the primary heat sink core assembly hot edge fins (203) is equipped with a secondary heat sink core assembly hot edge seal (202) at the end away from the primary heat sink core assembly (1).

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