Range separation structure for multi-path plate-fin heat exchanger

Abstract

The utility model discloses a stroke separation structure for a multi-flow plate-fin heat exchanger. The stroke separation structure is suitable for a heat exchanger mainly composed of a core assembly, a hot side inlet and outlet end cover, a cold side inlet and outlet assembly, a mounting plate assembly, a multi-flow switching end cover and the like. According to the core assembly, the heat exchange fins, the stroke separation parts, the sealing strips, the side plates and the like are welded into a whole through vacuum brazing, and the other parts and the core assembly are welded through argon arc welding. A stroke separation part is designed in the multi-flow plate-fin heat exchanger to separate two adjacent flows, so that the purpose of separating the flows is achieved. According to the heat exchanger, the long interval sealing strips, the special-shaped interval sealing strips, the interval fins, the short interval sealing strips, the harmonica-shaped tubes, the flat sealing strips or the flat partition plates and the sealing strips or the partition plates with grooves or protrusions or rivet holes are designed to serve as interval parts, so that the heat exchange efficiency, the size compactness and the weight lightness are optimal; and the performance and function requirements of high efficiency, compactness, lightness, safety and reliability of aviation and aerospace refrigeration accessories are met.

Description

Technical Field

[0001] The utility model relates to a compact and efficient separation design of a multi-pass plate-fin heat exchanger, belonging to the field of aircraft thermal management system design. Background Art

[0002] The flow transition of the fluid in the heat exchanger is usually designed into single-pass, double-pass, triple-pass, quadruple-pass and other flow structures according to the installation space, the position of the hot and cold side interfaces, the heat exchange performance and other functions and performance requirements. However, for multi-pass plate-fin heat exchanger refrigeration accessories with more than two passes, the partition design on the core usually adopts conventional wide seals (that is, obtained by increasing the width of the seal on the basis of the conventional seal) as the partition parts. However, the wider seal parts not only increase the weight and volume of the heat exchanger, but also reduce the heat exchange compactness of the heat exchanger. Summary of the invention

[0003] In view of the problems existing in the background technology, the utility model aims to provide a separation structure for a multi-pass plate-fin heat exchanger. According to the functions and performance requirements such as the installation space, the position of the cold and hot side interfaces, and the heat exchange performance, when the cold side or hot side fluid of the heat exchanger is designed into a double-pass, triple-pass, quadruple-pass or other flow structure, a compact and efficient separation structure is adopted, so that the size and weight of the refrigeration accessory heat exchanger in the thermal management system are reduced, the heat exchange performance is improved, and the compactness of the refrigeration accessory heat exchanger in the aircraft thermal management system is improved.

[0004] In order to solve the above problems, the utility model adopts the following technical solutions:

[0005] The partition structure for a multi-pass plate-fin heat exchanger includes partition parts for front and rear baffles and partition parts for left and right baffles, wherein:

[0006] The partition part for front and rear deflection is arranged between the fins corresponding to two adjacent flows in the same layer of fins in the core assembly, and is formed by any one of the following structures:

[0007] A combination of a long seal strip and a baffle fin;

[0008] Or a combination of a special-shaped barrier seal and a baffle fin;

[0009] Or a combination of a short spacer seal, a spacer fin and a baffle fin;

[0010] or a combination of a short-pass seal, a harmonica tube, and baffle fins;

[0011] Or a combination of a partition fin and a baffle fin;

[0012] or a harmonica pipe combined with baffled fins;

[0013] In the above structure, the long spacer seal, the special-shaped spacer seal, the spacer fin, the short spacer seal and the harmonica tube are parallel to the flow direction of the medium in the adjacent process, and the flow channels of the spacer fin and the harmonica tube are not connected to the flow channels of the fins, and the baffle fin is perpendicular to the flow direction of the medium in the adjacent process, and the flow channels of the baffle fin are connected to the flow channels of the fins;

[0014] Or a long seal for each trip;

[0015] Or a special-shaped barrier seal;

[0016] Or a combination of a short spacer seal and a spacer fin;

[0017] or a combination of a short-distance seal and a harmonica pipe;

[0018] or a combination of a short gap seal, a gap fin and a short gap seal;

[0019] Or a combination of a short-distance seal, a harmonica pipe and a short-distance seal;

[0020] Or a piece of interval fin;

[0021] or a harmonica pipe;

[0022] In the above structure, the long spacer seal, the special-shaped spacer seal, the short spacer seal, the spacer fin and the harmonica tube are parallel to the flow direction of the medium in the adjacent process, and the flow channels of the spacer fin and the harmonica tube are not connected with the flow channels of the fins;

[0023] The partition part for left and right deflection is arranged between two adjacent layers of fins with opposite flow in the core assembly and at least a part thereof is located on the outer surface of the core assembly, and the partition part is formed by any one of the following structures:

[0024] Flat seals or flat partitions of rectangular cross-section, where "flat" means that the four sides of the rectangle are straight sides, without grooves, protrusions or rivet holes;

[0025] or seals or partitions with grooves in rectangular cross-section;

[0026] or a rectangular cross section with raised seals or partitions;

[0027] Or a seal or partition with rivet holes in a rectangular cross-section.

[0028] It should be noted that the "long" and "short" in the long interval seal and the short interval seal are based on the existing conventional seals, that is, the long interval seal can be obtained by extending the length dimension of the existing conventional seal, and the short interval seal can be obtained by shortening the length dimension of the existing conventional seal.

[0029] As a solution, in the partition parts used for front and rear deflection, the ends of the partition long seal, special-shaped partition seal, short partition seal, partition fin and harmonica tube are shortened by a length compared to the fin, and the ends are welded to one end of the partition inside the hot side inlet and outlet end cover or the cold side inlet and outlet end cover on the outside of the core assembly.

[0030] As a solution, in the partition parts for left and right deflection, the ends of the flat seal strip or flat partition with a rectangular cross-section pass through the hot side inlet and outlet end covers and are welded to the hot side inlet and outlet end covers, or pass through the cold side inlet and outlet end covers and are welded to the cold side inlet and outlet end covers.

[0031] As a solution, in the partition parts used for front and rear deflection, grooves are provided at the ends of the long partition seal, special-shaped partition seal, short partition seal, partition fin and harmonica tube, and are plugged or riveted to one end of the partition in the hot side inlet and outlet end cover or the cold side inlet and outlet end cover or the protrusion at one end of the partition through the groove.

[0032] As a solution, in the partition parts used for left and right deflection, the seal or partition with a groove on the rectangular cross-section, the seal or partition with a protrusion on the rectangular cross-section are plugged into the partition inside the hot side inlet and outlet end cover or the cold side inlet and outlet end cover, and the seal or partition with a rivet hole on the rectangular cross-section is riveted to the partition inside the hot side inlet and outlet end cover or the cold side inlet and outlet end cover.

[0033] As a solution, in the partition parts used for left and right deflection, one end of a flat seal or flat partition with a rectangular cross-section, one end of a seal or partition with a groove on a rectangular cross-section, and one end of a seal or partition with a protrusion on a rectangular cross-section are plugged into the hot side inlet and outlet end cover or the cold side inlet and outlet end cover, and the other end is welded or butted to the core assembly; one end of a seal or partition with a rivet hole on a rectangular cross-section is plugged or riveted to the hot side inlet and outlet end cover or the cold side inlet and outlet end cover, and the other end is welded or butted to the core assembly.

[0034] As a solution, the core assembly is a plate-fin heat exchanger structure or a structure similar to a plate-fin heat exchanger, including fins, partitions, seals and side plates formed as an integral whole by vacuum brazing.

[0035] As a solution, the hot edge inlet and outlet end covers are welded to the core assembly by argon arc welding.

[0036] As a solution, the cold side inlet and outlet end covers are welded to the core assembly by argon arc welding.

[0037] As a solution, the outer side of the core assembly is also connected to a mounting plate assembly or a multi-pass transition end cover.

[0038] Compared with the prior art, the utility model has the following characteristics: when the heat exchanger is a multi-pass plate-fin structure or a similar plate-fin structure, the multi-pass core assembly is separated by special partition parts, and the partition parts can be special seals, special partitions, special fins or harmonica tubes, etc. The partition between the two adjacent end cover cavities in the hot side or cold side end cover multi-pass is connected to the partition parts of the core assembly by welding, plugging, riveting, docking, etc.

[0039] The utility model adopts a compact and efficient partition structure design. Under the condition of the same heat exchange performance (the harmonica tube, fins and some special-shaped seals as partition parts not only play a role in weight reduction, but also may improve the heat dissipation performance and reduce the flow resistance), the weight of the heat exchanger can be reduced by 5-10%, and the volume can be reduced by 2-3%. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic diagram of the structure of the heat exchanger involved in the utility model;

[0041] Figure 2 This is a schematic diagram of the multi-pass front and rear baffle structure (the left picture has a multi-pass transfer end cover, and the right picture does not have a multi-pass transfer end cover);

[0042] Figure 3 It is a schematic diagram of a multi-process left-right baffle structure;

[0043] Figure 4 It is a schematic diagram of the structure of the multi-process front and rear baffle core assembly;

[0044] Figure 5 It is a schematic diagram of the structure of the multi-flow left and right baffle core assembly, and the arrow indicates the flow direction of the medium;

[0045] Figure 6 Schematic diagram of the design structure of 9 kinds of partition parts for hot side or cold side multi-pass connection when the core assembly is baffled forward and backward, and the arrows in the figure indicate the flow direction of the medium;

[0046] Figure 7 Schematic diagram of the design structure of 6 kinds of interval parts for hot side or cold side multi-pass connection when the core assembly is baffled left and right;

[0047] Figure 8 to Figure 14 It is a schematic diagram of the connection between the hot side or cold side multi-pass partition parts and the hot side or cold side end cover when the core assembly is baffled;

[0048] In the figure: 1-core assembly; 2-hot side inlet and outlet end covers; 3-cold side inlet and outlet end covers; 4-mounting plate assembly; 5-multi-pass transfer end cover; 6-long interval seal; 7-special-shaped interval seal; 8-short interval seal; 9-interval fin; 10-harmonica tube; 11-fin; 12-baffle fin; 13-baffle seal; 14-seal; 15-wide seal. DETAILED DESCRIPTION

[0049] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments, but it should not be understood that the scope of the subject matter described in the present invention is limited to the following embodiments. Without departing from the above-mentioned technical ideas of the present invention, various modifications, substitutions and changes made according to the common technical knowledge and customary means in the field are included in the scope of the present invention.

[0050] like Figure 1 and Figure 2 The figure shows a multi-pass plate-fin heat exchanger, which includes a core assembly 1, a hot side inlet and outlet end cover 2, a cold side inlet and outlet end cover 3, a mounting plate assembly 4, a multi-pass transfer end cover 5 and other components. In order to improve its compactness and reduce its external dimensions and deadweight, it is designed Figure 6 and Figure 7 The compact and efficient partition structure shown.

[0051] The core assembly 1 is a plate-fin structure or a similar plate-fin structure. The fins 11, partitions, seals 14, and side panels are brazed into a whole by vacuum brazing. When the hot side flow channel or the cold side flow channel is a double-flow or multi-flow channel, the fins 11 of the hot side flow channel or the cold side flow channel are high-efficiency fins such as serrated or corrugated shapes with good functions and comprehensive performance. Taking the double-flow channel as an example, the partition parts are divided into two types according to the baffle form of the fluid in the core assembly 1: the front-to-back baffle form and the left-to-right baffle form. When it is the front-to-back baffle form ( Figure 4 The structure of the core assembly 1 with front and rear baffles is shown. The core assembly 1 is composed of a baffle seal 13, a seal 14, a baffle fin 12, a fin 11 and a wide seal 15, and the wide seal 15 is used as a spacer part). Figure 6 The structural forms of the intermediate parts in the core assembly 1 can be designed as follows:

[0052] 1) Baffle fin 12 + interval long seal 6, corresponding to Figure 6 Figure (1) in ;

[0053] 2) Baffle fin 12 + special-shaped spacer seal 7, corresponding to Figure 6 Figure (2) in ;

[0054] 3) Baffle fin 12 + short seal 8 + fin 9 or harmonica tube 10, corresponding to Figure 6 Figure (3) in ;

[0055] 4) Baffle fin 12 + interval fin 9 or harmonica tube 10, corresponding to Figure 6 Figure (4) in ;

[0056] 5) Long seal 6, corresponding to Figure 6 Figure (5) in ;

[0057] 6) Special-shaped barrier seal 7, corresponding to Figure 6 Figure (6) in ;

[0058] 7) 1 piece of short seal 8 + fin 9 or harmonica tube 10, corresponding to Figure 6 Figure (7) in ;

[0059] 8) 2 pieces of short seals 8 + fins 9 or harmonica tubes 10, corresponding to Figure 6 Figure (8) in ;

[0060] 9) The interval fin 9 or the harmonica tube 10 corresponds to Figure 6 Figure (9) in ;

[0061] When the flow is baffled left and right ( Figure 3 and Figure 5 The heat exchanger shape of the left and right baffles and the structure of the core assembly 1 are shown, such as Figure 7 The structural forms of the intermediate parts in the core assembly 1 can be designed as follows:

[0062] 1) Flat seal or flat partition with rectangular cross section, corresponding to Figure 7 Figure (1) in ;

[0063] 2) Rectangular cross-section grooved seal or partition, corresponding to Figure 7 Figure (2) in ;

[0064] 3) Rectangular cross-section with raised seals or partitions, corresponding to Figure 7 Figure (4) in ;

[0065] 4) Another seal or partition with a rectangular cross section and grooves, corresponding to Figure 7 FIG. (3) in the figure, the difference between this structure and FIG. (2) is that the bottom of the groove is located outside the end surface of the core component 1;

[0066] 5) Another rectangular cross-section with a raised seal or partition, corresponding to Figure 7 FIG. (5) in the figure, the difference between this structure and FIG. (4) is that the interface between the protrusion and the rectangular cross section is located outside the end surface of the core component 1, forming a tenon-like structure;

[0067] 6) A seal or partition with a rectangular cross-section and a rivet hole, and the end surface of the rectangular cross-section with the rivet hole is located outside the core component 1, corresponding to Figure 7 Figure (6) in .

[0068] In order to facilitate the processing of grooves, tenons (protrusions), rivet holes, welding, plugging, riveting, etc. to achieve process separation, the width of the seals, partitions, etc. at the separation is generally designed to be ≥3.5mm. The separation fin 9 can be a straight-through fin with a cross-section of a rectangle, triangle, trapezoid, etc., or a corrugated fin with a cross-section of a rectangle, triangle, trapezoid, etc. The separation harmonica tube 10 can be a harmonica tube with a cross-section of a rectangle, triangle, trapezoid, etc.

[0069] The hot side inlet and outlet end caps 2 are the inlet and outlet of high temperature hot fluid, and are welded to the core assembly 1 by argon arc welding. If the hot side is a multi-pass structure, the partition between two adjacent end cap cavities in the end cap (that is, the inside of the hot side inlet and outlet end caps 2 is divided into two unconnected cavities by the partition) and the separated pass parts of the core assembly 1 are connected by welding, plugging, riveting or docking.

[0070] The cold side inlet and outlet end covers 3 are the inlet and outlet of low-temperature cold fluid, and are welded to the core assembly by argon arc welding. If the cold side is a multi-flow structure, the partition between the two adjacent end cover cavities in the end cover (that is, the interior of the cold side inlet and outlet end covers 3 is divided into two unconnected cavities by the partition) and the partition parts of the core assembly 1 are connected by welding, plugging, riveting or docking.

[0071] The mounting plate assembly 4 is a mounting component for refrigeration accessories and upper components, and is welded to the core assembly 1 or the hot side inlet and outlet end cover 2 or the cold side inlet and outlet end cover 3 or the multi-process transfer end cover 5 by argon arc welding.

[0072] The multi-flow transfer end cover 5 is a transfer transition section when the multi-flow hot fluid or cold fluid flows out of one flow in the core component 1 and then enters another flow in the core component 1, and is welded to the core component 1 by argon arc welding.

[0073] The main processing method of the heat exchanger is as follows: the core assembly 1 is welded into a whole by vacuum brazing the fins 11, partitions, seals 14, partition parts, side panels and other parts; the partition between two adjacent end cover cavities in the end cover is connected to the partition parts of the core assembly 1 by welding, plugging, riveting, docking and the like; the core assembly 1, the hot side inlet and outlet end cover 2, the cold side inlet and outlet end cover 3, and the mounting plate assembly 4 are connected to form a heat exchanger by argon arc welding.

[0074] The heat exchanger mainly uses aluminum alloy, copper alloy, titanium alloy, stainless steel alloy or high-temperature alloy with good welding performance, mature process, good heat transfer performance and corrosion resistance.

[0075] like Figure 1 to Figure 3As shown, in this embodiment, the multi-pass heat exchanger is composed of components such as a core assembly 1, a hot side inlet and outlet end cover 2, a cold side inlet and outlet end cover 3, a mounting plate assembly 4, and a multi-pass transfer end cover 5. The core assembly 1, the hot side inlet and outlet end cover 2, the cold side inlet and outlet end cover 3, the mounting plate assembly 4, and the multi-pass transfer end cover 5 are connected to form a heat exchanger by argon arc welding.

[0076] like Figure 8 to Figure 14 As shown, when the heat exchanger is a double-pass or multi-pass structure, when the hot fluid or the cold fluid is a front-to-back baffle or a left-to-right baffle, the connection method between the partition between the two adjacent end cover cavities in the end cover and the partition parts of the core assembly 1 is welding, plugging, riveting, docking, etc. The state design form corresponding to the connection method is shown in Figure 8 to Figure 14 ,in Figure 8 and Fig. 9 Two welding methods are demonstrated. Figure 8 It is a front and rear baffle form. Figure 8 A in the middle is the welding point. Fig. 9 It is a left-right baffle form. Fig. 9 B in the middle is a partial magnified state of the welding position. Figure 10 to Figure 13 Four plug-in or riveting methods are shown. Fig.10 It is a front and rear baffle form. Fig.10 C in the middle is the plug-in or riveting position. Fig.11 It is a front and rear baffle form. Figure 12 to Figure 14 It is a left-right baffle form. Figure 11 to Figure 13 D, E, and F in the middle are partial enlarged states of plugging or riveting. Fig.14 Demonstrated plug-in or riveting + welding methods, Fig.14 G is the plugging or riveting position, and H is the welding or docking position. The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or replacements that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A spacer structure for a multi-pass plate-fin heat exchanger, characterized in that: It includes partition parts for front and rear baffles and partition parts for left and right baffles, wherein: The partition part for front and rear deflection is arranged between the fins (11) corresponding to two adjacent flow paths in the same layer of fins (11) in the core assembly (1), and is formed by any one of the following structures: A combination of a long seal strip (6) and a baffle fin (12); or a combination of a special-shaped barrier seal (7) and a baffle fin (12); or a combination of a short spacer seal (8), a spacer fin (9) and a baffle fin (12); or a combination of a short-distance seal (8), a harmonica tube (10) and a baffle fin (12); or a combination of a partition fin (9) and a baffle fin (12); or a combination of a harmonica tube (10) and a baffle fin (12); In the above structure, the long spacer seal (6), the special-shaped spacer seal (7), the spacer fin (9), the short spacer seal (8) and the harmonica tube (10) are parallel to the flow direction of the medium in the adjacent process, and the flow passages of the spacer fin (9) and the harmonica tube (10) are not connected to the flow passage of the fin (11), and the baffle fin (12) is perpendicular to the flow direction of the medium in the adjacent process, and the flow passage of the baffle fin (12) is connected to the flow passage of the fin (11); or a long seal (6); or a special-shaped barrier seal (7); or a combination of a short spacer seal (8) and a spacer fin (9); or a combination of a short-distance seal (8) and a harmonica pipe (10); or a combination of a short gap seal (8), a gap fin (9) and a short gap seal (8); or a combination of a short-distance seal (8), a harmonica tube (10) and a short-distance seal (8); or a spacer fin (9); or a harmonica pipe (10); In the above structure, the long spacer seal (6), the special-shaped spacer seal (7), the short spacer seal (8), the spacer fin (9) and the harmonica tube (10) are parallel to the flow direction of the medium in the adjacent process, and the flow channels of the spacer fin (9) and the harmonica tube (10) are not connected to the flow channel of the fin (11); The partition part for left and right deflection is arranged between two adjacent layers of fins (11) with opposite flow paths in the core component (1) and at least a part thereof is located on the outer surface of the core component (1), and is formed by any one of the following structures: Flat seals or partitions of rectangular cross-section; or seals or partitions with grooves in rectangular cross-section; or a rectangular cross section with raised seals or partitions; Or a seal or partition with rivet holes in a rectangular cross-section.

2. The isolating structure for a multi-pass plate-fin heat exchanger according to claim 1, characterized in that: In the partition parts for front and rear baffles, the ends of the partition long seal (6), the special-shaped partition seal (7), the partition short seal (8), the partition fin (9) and the harmonica tube (10) are shorter than the fin (11) by a certain length, and the ends are welded to one end of the partition inside the hot side inlet and outlet end cover (2) or the cold side inlet and outlet end cover (3) outside the core assembly (1).

3. The isolating structure for a multi-pass plate-fin heat exchanger according to claim 1, characterized in that: In the partition part for left and right deflection, the end of the flat sealing strip or flat partition with a rectangular cross section passes through the hot side inlet and outlet end cover (2) and is welded to the hot side inlet and outlet end cover (2), or passes through the cold side inlet and outlet end cover (3) and is welded to the cold side inlet and outlet end cover (3).

4. The isolating structure for a multi-pass plate-fin heat exchanger according to claim 1, characterized in that: In the partition parts used for front and rear deflection, the ends of the partition long seal strip (6), the special-shaped partition seal strip (7), the partition short seal strip (8), the partition fin (9) and the harmonica tube (10) are provided with grooves, and the grooves are plugged or riveted with one end of the partition plate in the hot side inlet and outlet end cover (2) or the cold side inlet and outlet end cover (3) or with a protrusion at one end of the partition plate.

5. The isolating structure for a multi-pass plate-fin heat exchanger according to claim 1, characterized in that: In the partition parts for left and right deflection, the seal strip or partition plate with grooves on the rectangular cross section and the seal strip or partition plate with protrusions on the rectangular cross section are plugged into the partition plate inside the hot side inlet and outlet end cover (2) or the cold side inlet and outlet end cover (3), and the seal strip or partition plate with rivet holes on the rectangular cross section are riveted to the partition plate inside the hot side inlet and outlet end cover (2) or the cold side inlet and outlet end cover (3).

6. The isolating structure for a multi-pass plate-fin heat exchanger according to claim 1, characterized in that: In the partition parts for left and right deflection, one end of a flat seal or a flat partition with a rectangular cross section, one end of a seal or a partition with a groove on a rectangular cross section, and one end of a seal or a partition with a protrusion on a rectangular cross section are plugged into the hot side inlet and outlet end cover (2) or the cold side inlet and outlet end cover (3), and the other end is welded or butted with the core assembly (1); one end of a seal or a partition with a rivet hole on a rectangular cross section is plugged or riveted with the hot side inlet and outlet end cover (2) or the cold side inlet and outlet end cover (3), and the other end is welded or butted with the core assembly (1).

7. The isolating structure for a multi-pass plate-fin heat exchanger according to claim 1, characterized in that: The core assembly (1) is a plate-fin heat exchanger structure or a structure similar to a plate-fin heat exchanger structure, and comprises fins (11), partitions, sealing strips (14) and side plates formed as an integral whole by vacuum brazing.

8. The isolating structure for a multi-pass plate-fin heat exchanger according to claim 2, 3, 4, 5 or 6, characterized in that: The hot edge inlet and outlet end covers (2) are welded to the core assembly (1) by argon arc welding.

9. The isolating structure for a multi-pass plate-fin heat exchanger according to claim 2, 3, 4, 5 or 6, characterized in that: The cold side inlet and outlet end covers (3) are welded to the core assembly (1) by argon arc welding.

10. The isolating structure for a multi-pass plate-fin heat exchanger according to claim 1, characterized in that: The outer side of the core assembly (1) is also connected to a mounting plate assembly (4) or a multi-pass transfer end cover (5).

Images