Plate-fin heat exchanger core

Abstract

The utility model provides a plate-fin heat exchanger core body, the plate-fin heat exchanger core body is provided with a core width direction and a core height direction, the plate-fin heat exchanger core body comprises two side plates which are oppositely arranged in a spaced mode in the core width direction, fins and partition plates which are sequentially and alternately arranged in the core width direction are arranged between the side plates, and the partition plates are arranged between the two side plates. Heat dissipation channels are formed in the fins; the side faces, opposite to each other in the core width direction, of the two side plates are core width design faces, and the core width design faces extend outwards in the core width direction to form error parts capable of being milled. According to the plate-fin heat exchanger core, the error part is additionally arranged on the outer side of the side plate core in the width direction, so that the machining size error is avoided in the early stage of core assembly, the core can be fully machined to the required size, overall scrapping caused by leakage in a core test after tailor welding forming is avoided, the rejection rate of the core is reduced, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to plate-fin heat exchanger technical field especially relates to a plate-fin heat exchanger core body. BACKGROUND

[0002] Aluminum plate-fin heat exchanger belongs to a novel high-efficiency heat exchanger, and its remarkable advantages are compact structure, less volume occupation, high structural strength, good heat transfer efficiency and relatively low manufacturing cost compared with copper products, and it is widely used in various fields such as petroleum, chemical industry, automobile, air compressor and engineering machinery, and has been recognized by many industries.

[0003] The existing plate-fin heat exchanger for generator set has the following defects:

[0004] During the early development process, the leakage of the core body causes the loss of the entire product scrap, specifically, the plate-fin heat exchanger is welded compared with the traditional two-face channel, the six faces of the generator set are welded, and the complex structure of the parts is completed by carving an aluminum block, and once the core body is tested for leakage after being welded into shape, the whole will be scrapped.

[0005] Therefore, in order to solve the above problems, the utility model provides a plate-fin heat exchanger core body capable of reducing the core body scrap rate. INVENTION CONTENTS

[0006] In order to solve the above problems of the existing plate-fin heat exchanger for generator set, the utility model provides a plate-fin heat exchanger core body.

[0007] According to one object of the utility model, the utility model provides a plate-fin heat exchanger core body, which is provided with a core width direction and a core height direction, and comprises two side plates arranged opposite to each other along the core width direction, fins and partition plates arranged alternately along the core width direction between the side plates, and a heat dissipation channel formed on the fins.

[0008] The side faces of the two side plates opposite to each other in the core width direction are core width design faces, and the core width design faces extend outward in the core width direction to form millable error parts;

[0009] The side faces of the core body opposite to each other in the core height direction are core height design faces, and the core height design faces are provided with weld seams, the weld seams are connected by welding to form a surfacing part, and the surfacing part extends outward to the outside of the core height design face in the core height direction.

[0010] A dummy water chamber can be installed at the end of the heat dissipation channel in the longitudinal direction. The dummy water chamber is configured to communicate with the heat dissipation channel to test the sealing performance of the plate-fin heat exchanger core.

[0011] Preferably, a wire cutting section is provided between the weld overlay and the weld, and the wire cutting section is flush with the core height design surface.

[0012] Preferably, the error portion has a size of 1-2 mm in the core width direction, the spacing between the core width design surfaces in the core width direction is the core width design size, and the size between the outer surfaces of the error portions of the two side plates in the core width direction is 2-4 mm larger than the core width design size.

[0013] Preferably, the spacing between the core height design surfaces in the core height direction is the core height design dimension, and the dimension between the outer surfaces of the weld overlay in the core height direction is 2-4 mm larger than the core height design dimension.

[0014] Preferably, the dimension of the weld overlay in the core height direction is 2 mm.

[0015] Preferably, the error portion has a dimension of 1 mm in the core width direction, and the weld overlay portion has a dimension of 0.5 mm in the core height direction.

[0016] Preferably, the weld seam is provided with a brazing part, and the brazing part and the weld overlay part are arranged sequentially from the inside to the outside along the core height direction.

[0017] Preferably, a fake water chamber is installed at each end of the heat dissipation channel along its length.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] The plate-fin heat exchanger core has an error section added to the outer side of the side plate core width direction to avoid machining dimensional errors in the early stage of core assembly. This allows the core to be fully machined to the required dimensions, avoiding the overall scrapping caused by core leakage during testing after welding and forming, reducing the core scrap rate and improving production efficiency.

[0020] In addition, by setting up a dummy water chamber, the core can be tested in the early stage of product welding without damaging the core surface. Unqualified cores are inspected, and after the inspection, the core is machined without damage. The error parts on the easily deformable side plates on both sides are further milled to ensure the perpendicularity and flatness of the core surface. After the machining is completed, the manifold is welded on the core, and the dummy water chamber is formed inside the manifold. The dummy water chamber is divided into water chamber, gas chamber or oil chamber, etc., depending on the different fluids distributed and collected, and finally a plate-fin heat exchanger is formed.

[0021] The utility model is further illustrated below in combination with the drawings and examples. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is the whole schematic view of the plate-fin heat exchanger core body of the utility model;

[0023] Figure 2 It is the milling schematic view of the plate-fin heat exchanger core body of the utility model;

[0024] Figure 3 It is the test schematic view of the plate-fin heat exchanger core body connecting false water chamber of the utility model;

[0025] Figure 4 It is the partial enlarged schematic view of the plate-fin heat exchanger core body of the utility model. DETAILED DESCRIPTION

[0026] The following description is used to explain the utility model in detail to enable those skilled in the art to realize the utility model. The preferred embodiments in the following description are only as examples, and other obvious variants can be thought of by those skilled in the art. The basic principles of the utility model defined in the following description can be applied to other implementation schemes, variant schemes, improved schemes, equivalent schemes and other technical schemes without departing from the spirit and scope of the utility model.

[0027] Please refer to Figures 1-3 The utility model provides a technical scheme: a plate-fin heat exchanger core body is provided with core width direction a and core height direction b, the plate-fin heat exchanger core body includes two side plates 100 that are oppositely spaced apart along the core width direction a, the side plate 100 is provided with fin 200 and baffle 300 that are alternately arranged in sequence along core width direction a between the two side plates 100, the fin 200 is formed with heat dissipation passage 200a, and both sides of the heat dissipation passage 200a in the width direction are sealed and connected through a seal;

[0028] The side face of the two side plates 100 opposite in the core width direction a is core width design surface a100, the core width design surface a100 extends outward in the core width direction a to form millable error part 101, further, the error part 101 and the core width design surface a100 are provided with milling part, the milling part is flush with the core width design surface a100, by the mode of wire cutting, the surfacing part is cut off along the wire cutting part, at the same time, the milling bed processing mode is used to mill the error part 101 on both sides along the milling part, to ensure that the perpendicularity and flatness of the core body 500 after milling meet the requirements;

[0029] The opposite side of the core 500 in the core height direction b is a core height design surface b100, and a weld is arranged on the core height design surface b100, wherein the weld is a gap formed between the fins 200, the partition plates 300 and the side plates 100 for assembly, and the weld forms an outwardly extending build-up portion in the core height direction b by welding;

[0030] The end of the heat dissipation channel 200a in the length direction can be provided with a false water chamber 400, which is arranged to be in communication with the heat dissipation channel 200a to test the sealing performance of the plate-fin heat exchanger core.

[0031] By adding the error portion 101 on the outside of the side plate 100 in the core width direction a, the machining size error in the early stage of assembling the core 500 can be avoided, the core 500 can be fully machined to the required size, the leakage test of the core 500 after the assembly of the core 500 can be avoided, the overall rejection can be avoided, the rejection rate of the core 500 can be reduced, and the production efficiency can be improved.

[0032] In addition, by arranging the false water chamber 400, the core 500 can be tested in the early stage of product welding, without damaging the surface of the core 500, detecting the unqualified core 500, and machining the core 500 after the detection, without damaging the core 500, further milling the error portion 101 on the two sides of the deformed side plate 100, ensuring the perpendicularity and flatness of the surface of the core 500, and welding the header tank on the core 500 after the machining is completed, and the false water chamber 400 is formed in the header tank, wherein the false water chamber 400 is divided into a water chamber, an air chamber or an oil chamber according to the distribution and collection of fluid, and finally forms a plate-fin heat exchanger.

[0033] Further, the wire cutting portion is arranged between the build-up portion and the weld, and the wire cutting portion is flush with the core height design surface b100, so that the wire cutting is performed according to the core height design surface b100 after the welding test is passed by the false water chamber 400, and the wire cutting is just cut to the position of the weld without damaging the core 500.

[0034] Optionally, the size of the error portion 101 in the core width direction a is 1-2 mm, the interval size of the core width design surface a100 in the core width direction a is the core width design size y, and the size between the outer sides of the error portions 101 of the two side plates 100 in the core width direction a is greater than the core width design size y by 2-4 mm.

[0035] The interval size of the core height design surface b100 in the core height direction b is a core height design size x, and the size between the outer sides of the surfacing portion in the core height direction b is greater than the core height design size x by 2-4 mm. Preferably, the size of the surfacing portion in the core height direction b is 2 mm. Through the above design, the machining size error can be avoided in the early stage of assembly of the core 500, and the core 500 can be fully machined to the required size, thereby reducing the scrap rate of the core 500 and improving the production efficiency. In the embodiment, referring to Figure 2 , the size of the error portion 101 in the core width direction a is 1 mm, and the size of the surfacing portion in the core height direction b is 0.5 mm.

[0036] Further, the welding seam is provided with a brazing portion, and the brazing portion and the surfacing portion are arranged in sequence from inside to outside along the core height direction b. During welding of the welding seam, the surfacing process is added to avoid some uncontrollable factors during brazing from causing the core 500 to deform, thereby avoiding the scrap of the core 500 in the later stage. By adding the above early stage process, it is beneficial to reduce the welding error for some high-quality and high-quality products and reduce the probability of poor quality due to large brazing deformation.

[0037] Further, referring to Figure 3 , one of the false water chambers 400 is mounted at each end of the length direction of the heat dissipation channel 200a.

[0038] In summary, the assembly method of the plate-fin heat exchanger core is basically the same as that of the existing plate-fin heat exchanger core, and the difference lies in that the two side plates 100 in the core width direction a are extended outward to form error portions 101 to increase the thickness of the two sides in the core width direction a. The size of the error portion 101 is greater than that of the two side plates 100 before assembly of the core 500 by 1-2 mm, and the overall core width is increased by about 2-4 mm. The core height design surface b100 is smaller than the surfacing portion on the outer side in the core height direction b by about 2-4 mm. After brazing is completed, the welding seam is surfacing on the two sides in the core height direction, the height of the surfacing portion is about 2 mm, and then the false water chamber 400 is used for welding test. After the test is qualified, the design size is cut, the line cutting is performed along the core height design surface b100, the line cutting is exactly cut to the welding seam position without damaging the core 500, and the milling machine is used for processing the two side plates 100 along the core width design surface a100 to ensure that the perpendicularity and flatness of the core 500 after milling meet the requirements.

[0039] The plate-fin heat exchanger core can meet the process requirements that cannot be met by traditional brazing, and is suitable for some plate-fin heat sinks with high requirements.

[0040] The above-described embodiments are only used for illustrating the technical ideas and characteristics of the present application, and the purpose is to enable the skilled in the art to understand the content of the present application and to implement it, and the present embodiment cannot be used to limit the patent application range of the present application, that is, any equivalent changes or modifications made according to the spirit disclosed in the present application still fall within the patent range of the present application.

Claims

1. A plate-fin heat exchanger core, characterized in that The plate-fin heat exchanger core is provided with a core width direction (a) and a core height direction (b). The plate-fin heat exchanger core includes two side plates (100) arranged at intervals along the core width direction (a). Fins (200) and partitions (300) are arranged alternately along the core width direction (a) between the side plates (100). Heat dissipation channels (200a) are formed on the fins (200). The two side plates (100) have opposite sides in the core width direction (a) as core width design surfaces (a100), and the core width design surfaces (a100) extend outward in the core width direction (a) to form millable error portions (101). The core (500) has a core height design surface (b100) on the opposite side in the core height direction (b). A weld is provided on the core height design surface (b100). The weld is connected by welding to form a weld overlay. The weld overlay extends outward in the core height direction (b) to the outside of the core height design surface (b100). A dummy water chamber (400) may be installed at the end of the heat dissipation channel (200a) in the length direction. The dummy water chamber (400) is configured to communicate with the heat dissipation channel (200a) to test the sealing performance of the plate-fin heat exchanger core.

2. A plate-fin heat exchanger core according to claim 1, characterized in that A wire cutting section is provided between the weld overlay and the weld, and the wire cutting section is flush with the core height design surface (b100).

3. A plate-fin heat exchanger core according to claim 1, characterized in that The error portion (101) has a size of 1-2 mm in the core width direction (a), the spacing of the core width design surface (a100) in the core width direction (a) is the core width design size (y), and the size between the outer surfaces of the error portion (101) of the two side plates (100) in the core width direction (a) is 2-4 mm larger than the core width design size (y).

4. A plate-fin heat exchanger core according to claim 1, characterized in that The spacing dimension of the core height design surface (b100) in the core height direction (b) is the core height design dimension (x), and the dimension between the outer surfaces of the weld overlay in the core height direction (b) is 2-4 mm larger than the core height design dimension (x).

5. A plate-fin heat exchanger core according to claim 1, characterized in that, The dimension of the weld overlay in the core height direction (b) is 2 mm.

6. A plate-fin heat exchanger core according to claim 1, characterized in that, The error section (101) has a dimension of 1 mm in the core width direction (a), and the weld overlay has a dimension of 0.5 mm in the core height direction (b).

7. A plate-fin heat exchanger core according to claim 1, characterized in that, The weld is provided with a brazing part, and the brazing part and the overlay part are arranged sequentially from the inside to the outside along the core height direction (b).

8. A plate-fin heat exchanger core according to claim 1, characterized in that, The heat dissipation channel (200a) has a fake water chamber (400) installed at each end in the length direction.

Images