Heat exchanger

Abstract

A heat exchanger comprises a core body, the core body comprises a first plate sheet and a second plate sheet, the core body is provided with a first channel and a second channel, the first channel comprises a first hole channel and a second hole channel, and the first channel further comprises a first inter-plate channel located between the first plate sheet and the second plate sheet; the first plate sheet and / or the second plate sheet comprise / comprises a first isolation part for dividing the first inter-plate channel into a first inter-sub-plate channel and a second inter-sub-plate channel, the core body further comprises a first insertion pipe, the first insertion pipe comprises a first pipe main body, at least part of the first pipe main body is located in the first hole channel, and the first pipe main body is provided with a first circulation channel; the first circulation channel is communicated with the first inter-plate channel; a face which passes through the center line of the first pipe main body and extends in the length direction of the first plate sheet is defined as a first face, the sum of the through-flow areas of the first circulation channels located between the first face and the first isolation part is S1, the sum of the through-flow areas of the first circulation channels located on the first face and deviating from the first isolation part is S2, and S1 is smaller than S2.

Description

[Technical field]

[0001] The present application relates to the field of heat exchange technology, and in particular to a heat exchanger. [Background technology]

[0002] Plate heat exchangers have high heat exchange efficiency, are compact, and are relatively light in weight. They can be used in many industries such as refrigeration, chemical industry, and water treatment. The basic principle of a plate heat exchanger is to form multiple adjacent and spaced flow channels between multiple heat exchange plates, and the two heat exchange media exchange heat through the heat exchange plates in adjacent flow channels. With the increase in the application scenarios of plate heat exchangers, the performance requirements for plate heat exchangers are also increasing. In a heat exchanger with a U-shaped inter-plate channel, although the inter-plate channel is long, the fluid tends to flow close to the dividing ribs when flowing, and the uniformity of fluid distribution needs to be further improved. [Summary of the invention]

[0003] A heat exchanger is provided, comprising a core, the core comprising a first plate and a second plate arranged in a stacked manner, the core having a first channel and a second channel isolated from each other, the first channel comprising a first hole and a second hole located on the same width direction side of the core, the first channel further comprising a first inter-plate channel located between the first plate and the second plate and corresponding to the first hole and the second hole, the first plate and / or the second plate comprising a first isolating portion for separating the first inter-plate channel into a first sub-inter-plate channel and a second sub-inter-plate channel, the first sub-inter-plate channel being in communication with the first hole, and the second sub-inter-plate channel being in communication with the second hole; The core body also includes a first insert tube, which includes a first tube body, which is at least partially located in the first channel, and has a first circulation channel, which is located between the adjacent first plate and the second plate, and is connected to the first inter-plate channel; it is defined that the surface passing through the center line of the first tube body and extending in the length direction of the first plate is the first surface, the sum of the flow areas of the first circulation channels located between the first surface and the first isolation part is S1, and the sum of the flow areas of the first circulation channels located on the first surface away from the first isolation part is S2, and S1<S2.

[0004] In such a heat exchanger, the core includes a first insert tube, the first insert tube includes a first tube body, the first tube body is at least partially located in the first channel, the first tube body has a first circulation channel, the first circulation channel is located between the adjacent first plate and the second plate, and the first circulation channel is connected to the first inter-plate channel; it is defined that the surface passing through the center line of the first tube body and extending in the length direction of the first plate is the first surface, the sum of the flow areas of the first circulation channels located between the first surface and the first isolation part is S1, and the sum of the flow areas of the first circulation channels located on the first surface away from the first isolation part is S2, S1<S2. When the heat exchanger is working, the flow resistance of the fluid when flowing through the first circulation channel located between the first surface and the first isolation part is greater than the flow resistance of the fluid when flowing through the first circulation channel of the first surface away from the first isolation part, so that part of the fluid tends to flow away from the first isolation part, thereby improving the uniformity of the distribution of the fluid in the first inter-plate channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0005] Figure 1 It is a structural schematic diagram of an implementation mode of a heat exchanger in the present application;

[0006] Figure 2 yes Figure 1 Sectional view of AA in the middle;

[0007] Figure 3 It is a partial structural schematic diagram of an implementation mode of a heat exchanger in the present application;

[0008] Figure 4 is a schematic structural diagram of a first insert pipe of an embodiment of a heat exchanger in the present application;

[0009] Figure 5 It is a partial structural schematic diagram of a bottom plate of an embodiment of a heat exchanger in the present application;

[0010] Figure 6 It is a partial structural schematic diagram of another embodiment of the heat exchanger in the present application.

[0011] Reference numerals:

[0012] Core 1, first plate 11, first main body 111, first convex portion 1121, first welding portion 1122, first convex rib 113, third convex rib 114, second plate 12, second main body 121, second convex portion 1221, second welding portion 1222, second convex rib 123, first channel 131, second channel 132, first sub-plate inter-channel 1331, second sub-plate inter-channel 1332, first insert 14, first tube body 141, first limiting convex portion 142, first circulation channel 143, first port 1431, second insert 15, second circulation channel 151,

[0013] Bottom plate 2, first limiting groove 21,

[0014] The top plate 3 , the third main body portion 31 , the first flange portion 32 , and the second flange portion 33 . DETAILED DESCRIPTION

[0015] The technical solution of the specific implementation method is described below in conjunction with the accompanying drawings.

[0016] It should be noted that: although this specification has described the present invention in detail with reference to the above-mentioned embodiments, ordinary technicians in the field should understand that technicians in the relevant technical field can still modify, combine or replace the present invention with equivalents, and all technical solutions and improvements thereto that do not depart from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

[0017] refer to Figure 1-Figure 2 A heat exchanger includes a core 1, the core 1 includes a first plate 11 and a second plate 12 which are stacked, the core 1 has a first channel and a second channel which are isolated from each other, the first channel includes a first channel 131 and a second channel 132 which are located on the same width direction side of the core 1, the first channel also includes a first inter-plate channel which is located between the first plate 11 and the second plate 12 and corresponds to the first channel 131 and the second channel 132, the first plate 11 and / or the second plate 12 include a first plate The inter-plate channel is divided into a first isolation part of a first sub-plate channel 1331 and a second sub-plate channel 1332. The first sub-plate channel 1331 is connected to the first hole 131, and the second sub-plate channel 1332 is connected to the second hole 132. The heat exchange medium can flow from the first hole 131 through the first sub-plate channel 1331, then flow to the second inter-plate channel, and finally flow out of the core 1 through the second hole 132. The medium flow path is roughly U-shaped, which extends the fluid flow path and improves the heat exchange efficiency of the heat exchanger.

[0018] The first plate 11 may be substantially the same as the second plate 12 , and will not be described in detail herein.

[0019] refer to Figure 2-Figure 3 The core body 1 also includes a first insert tube 14, which includes a first tube body 141. The first tube body 141 is at least partially located in the first channel 131. The first tube body 141 has a first circulation channel 143. The first circulation channel 143 is located between the adjacent first plate 11 and the second plate 12. The first circulation channel 143 is connected to the first inter-plate channel.

[0020] refer to Figure 2-Figure 3, definition, the surface passing through the center line of the first tube body 141 and extending in the length direction of the first plate 11 is the first surface, the sum of the flow areas of the first circulation channels 143 located between the first surface and the first isolation portion is S1, the sum of the flow areas of the first circulation channels 143 located on the first surface away from the first isolation portion is S2, S1<S2.

[0021] In such a heat exchanger, the core 1 includes a first insert tube 14, the first insert tube 14 includes a first tube body 141, the first tube body 141 is at least partially located in the first channel 131, the first tube body 141 has a first circulation channel 143, the first circulation channel 143 is located between the adjacent first plate 11 and the second plate 12, and the first circulation channel 143 is connected to the first inter-plate channel; it is defined that the surface passing through the center line of the first tube body 141 and extending in the length direction of the first plate 11 is the first surface, the sum of the flow areas of the first circulation channels 143 located between the first surface and the first isolation portion is S1, and the sum of the flow areas of the first circulation channels 143 located on the first surface away from the first isolation portion is S2, and S1<S2. When the heat exchanger is working, the flow resistance of the fluid when flowing through the first circulation channel 143 located between the first surface and the first isolation portion is greater than the flow resistance of the fluid when flowing through the first circulation channel 143 of the first surface away from the first isolation portion, so that part of the fluid tends to flow away from the first isolation portion, thereby improving the uniformity of the fluid distribution in the first plate inter-plate channel.

[0022] The first plane passes through the center line of the first pipe body 141 means that the center line of the first pipe body 141 is located in the first plane.

[0023] The sum of the flow areas of the first flow channels 143 between the first surface and the first isolation portion is S1, where S1≥0. For example, the first tube body 141 between the first surface and the first isolation portion is not provided with a flow channel, which is not described in detail here.

[0024] refer to Figure 3 There are multiple first circulation channels 143, for example, 4 first circulation channels 143, which are arranged in the circumferential direction of the first tube body 141, and the center lines of the first circulation channels 143 are located in the same plane. The cross-section of the first circulation channels 143 is circular, and the apertures of the first circulation channels 143 increase successively.

[0025] Of course, the first circulation channels 143 may be staggered with each other in the axial direction of the first tube body 141 , and the cross-section of the first circulation channels 143 may be rectangular, triangular, etc., which will not be elaborated here.

[0026] Of course, there can be one first circulation channel 143 located between a first plate 11 and a second plate 12 adjacent thereto, and part of the first circulation channel 143 is located on the side of the first surface away from the first isolation portion, and part of the first circulation channel 143 is located between the first surface and the first isolation portion, which will not be elaborated here.

[0027] refer to Figure 2-Figure 3 The first plate 11 includes a first main body 111 and a first fixing part, the first tube body 141 is penetrated by the first fixing part, and the first fixing part is welded to the first tube body 141. The second plate 12 includes a second main body 121 and a second fixing part, the first tube body 141 is penetrated by the second fixing part, and the second fixing part is welded to the first tube body 141.

[0028] refer to Figure 2-Figure 3 The first fixing portion includes a first protrusion 1121 and a first welding portion 1122. The first protrusion 1121 protrudes from the first main body portion 111. The first welding portion 1122 extends from the end of the first protrusion 1121 away from the first main body portion 111 toward the first tube body 141. The first welding portion 1122 is welded to the first tube body 141.

[0029] refer to Figure 2-Figure 3 The second fixing portion includes a second protrusion 1221 and a second welding portion 1222. The second protrusion 1221 protrudes from the second main body portion 121. The second welding portion 1222 extends from the end of the second protrusion 1221 away from the second main body portion 121 toward the first tube body 141. The second welding portion 1222 is welded to the first tube body 141.

[0030] refer to Figure 2 The first welding portion 1122 is welded to the second welding portion 1222 located above it, the first welding portion 1122 and the second welding portion 1222 located below it have a certain distance, and the first inter-plate channel is located between the first plate 11 and the second plate 12 located below the first plate 11.

[0031] refer to Figure 2 The first circulation channel 143 has a first port 1431 , which is located on the outer peripheral wall of the first tube body 141 and between the first welding portion 1122 and the second welding portion 1222 , wherein the second welding portion 1222 is located below the first welding portion 1122 .

[0032] refer to Figure 2-Figure 3The first plate 11 has a first convex rib 113, which protrudes from the first main body 111. The second plate 12 has a second convex rib 123, which protrudes from the second main body 121. The second convex rib 123 is partially surrounded by the first convex rib 113. The first convex rib 113 and the second convex rib 123 are welded. The first plate 11 has a third convex rib 114, which is located at one end of the first convex rib 113. The end of the third convex rib 114 away from the first convex rib 113 is roughly flush with a short side of the first main body 111, and the third convex rib 114 is welded to the second main body 121.

[0033] refer to Figure 3 The shortest distance between the long side of the first main body 111 and the first surface is L1, and the shortest distance between the third rib 114 and the first surface is L2, L1=L2.

[0034] refer to Figure 2 The first insert tube 14 includes a first limiting protrusion 142, which protrudes from the bottom wall of the first tube body 141, and is crescent-shaped or arc-shaped. The heat exchanger has a bottom plate 2, and the bottom plate 2 has a first limiting groove 21. The first limiting groove 21 is recessed in the upper wall of the bottom plate 2, and is crescent-shaped or arc-shaped. The first limiting protrusion is matched with the first limiting groove 21, which is convenient for positioning the first insert tube 14 during installation.

[0035] refer to Figure 2 The heat exchanger has a top plate 3, which includes a third main body portion 31 and a first flange portion 32. The third main body portion 31 has a first mounting hole, which is opposite to the first channel 131. The first flange portion 32 protrudes from the third main body portion 31. The first tube body 141 is provided with the first mounting hole. The first flange portion 32 is sleeved on the first tube body 141, and the first flange portion 32 is welded to the first tube body 141.

[0036] refer to Figure 2 The core body 1 also includes a second insert tube 15, which includes a second tube body. The second tube body is at least partially located in the second channel 132, and the second tube body has a second circulation channel 151. The second circulation channel 151 is located between the adjacent first plate 11 and the second plate 12, and the second circulation channel 151 is connected to the first inter-plate channel.

[0037] refer to Figure 2-Figure 3 , definition, the surface passing through the center line of the second tube body and extending in the length direction of the first plate 11 is the second surface, the sum of the flow areas of the first circulation channels 143 located between the second surface and the first isolation portion is S3, the sum of the flow areas of the second circulation channels 151 located on the second surface away from the first isolation portion is S4, S3<S4.

[0038] The first insert pipe 14 is the fluid inlet pipe of the heat exchanger, and the second insert pipe 15 is the fluid outlet pipe of the heat exchanger, which will not be described in detail here.

[0039] refer to Figure 2 The top plate 3 includes a second flange portion 33, the third main body portion 31 has a second mounting hole, the second mounting hole is opposite to the second channel 132, the second flange portion 33 protrudes from the third main body portion 31, the second tube body is penetrated by the second mounting hole, the second flange portion 33 is sleeved on the second tube body, and the second flange portion 33 is welded to the second tube body.

[0040] The first circulation channel 143 is located between a first plate 11 and a second plate 12 adjacent thereto. Of course, the first tube body 141 may be provided with a third circulation channel, and the third circulation channel is connected to the first sub-plate channel 1331. The third circulation channel is located between another first plate 11 and a second plate 12 adjacent thereto. The third circulation channel may be provided in the same manner as the first circulation channel 143. Of course, the channel connecting the first tube body 141 and the first sub-plate channel 1331 may be provided in accordance with the first circulation channel 143, and the second tube body may also be provided in accordance with the first tube body 141, which will not be elaborated here.

[0041] refer to Figure 6 Any adjacent first fixing portion is arranged at a certain distance from the second fixing portion, and the first circulation channel 143 has a second port, and the second port is located between the adjacent first fixing portion and the second fixing portion, wherein the second fixing portion is located below the first fixing portion.

[0042] For example, the first plate 11 is not provided with the first protrusion 1121 and the first welding portion 1122, that is, the first fixing portion is in the shape of a flat plate, the second plate 12 is not provided with the second protrusion 1221 and the second welding portion 1222, that is, the second fixing portion is in the shape of a flat plate, the first tube body 141 is located between the first plate 11 and the second plate 12 adjacent to it and below it, and a first circulation channel 143 is provided, and the first tube body 141 is located between the first plate 11 and the second plate 12 adjacent to it and above it, and no circulation hole is provided, which will not be elaborated here.

[0043] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A heat exchanger, comprising a core (1), wherein the core (1) comprises a first plate (11) and a second plate (12) which are stacked, and wherein the core (1) has a first channel and a second channel which are isolated from each other, and wherein: The first channel comprises a first hole (131) and a second hole (132) located on the same width direction side of the core (1), the first channel also comprises a first inter-plate channel located between the first plate (11) and the second plate (12) and corresponding to the first hole (131) and the second hole (132), the first plate (11) and / or the second plate (12) comprises a first isolation portion for separating the first inter-plate channel into a first sub-inter-plate channel (1331) and a second sub-inter-plate channel (1332), the first sub-inter-plate channel (1331) being in communication with the first hole (131), and the second sub-inter-plate channel (1332) being in communication with the second hole (132); The core (1) further comprises a first insert tube (14), the first insert tube (14) comprising a first tube body (141), the first tube body (141) being at least partially located in the first hole (131), the first tube body (141) having a first circulation channel (143), the first circulation channel (143) being located between the adjacent first plate (11) and the second plate (12), the first circulation channel (143) being communicated with the first inter-plate channel; It is defined that the surface passing through the center line of the first tube body (141) and extending in the length direction of the first plate (11) is the first surface, the sum of the flow areas of the first circulation channels (143) located between the first surface and the first isolation portion is S1, and the sum of the flow areas of the first circulation channels (143) located on the first surface away from the first isolation portion is S2, and S1<S2.

2. The heat exchanger according to claim 1, characterized in that: There are a plurality of first circulation channels (143), and the first circulation channels (143) are arranged in the circumferential direction of the first tube body (141). The cross section of the first circulation channels (143) is circular, and the apertures of the first circulation channels (143) increase sequentially.

3. The heat exchanger according to claim 2, characterized in that: The first plate (11) comprises a first main body (111) and a first fixing part, the first tube body (141) is penetrated by the first fixing part, and the first fixing part is welded to the first tube body (141); the second plate (12) comprises a second main body (121) and a second fixing part, the first tube body (141) is penetrated by the second fixing part, and the second fixing part is welded to the first tube body (141).

4. The heat exchanger according to claim 3, characterized in that: The first fixing portion comprises a first convex portion (1121) and a first welding portion (1122), the first convex portion (1121) protruding from the first main body portion (111), the first welding portion (1122) extending from an end of the first convex portion (1121) away from the first main body portion (111) toward the first pipe body (141), and the first welding portion (1122) is welded to the first pipe body (141); The second fixing portion comprises a second convex portion (1221) and a second welding portion (1222), the second convex portion (1221) protrudes from the second main body portion (121), the second welding portion (1222) extends from an end of the second convex portion (1221) away from the second main body portion (121) toward the first pipe main body (141), and the second welding portion (1222) is welded to the first pipe main body (141); The first welding portion (1122) is welded to a second welding portion (1222) located above the first welding portion (1122), and a certain distance exists between the first welding portion (1122) and the second welding portion (1222) located below the first welding portion (1122); The first circulation channel (143) has a first port (1431), the first port (1431) is located on the outer peripheral wall of the first tube body (141), the first port (1431) is located between the first welding portion (1122) and the second welding portion (1222), wherein the second welding portion (1222) is located below the first welding portion (1122).

5. The heat exchanger according to claim 3, characterized in that: Any adjacent first fixing part and second fixing part are arranged at a certain distance, and the first circulation channel (143) has a second port, and the second port is located between the adjacent first fixing part and the second fixing part, wherein the second fixing part is located below the first fixing part.

6. The heat exchanger according to any one of claims 1 to 5, characterized in that: The first insert tube (14) comprises a first limiting protrusion (142), the first limiting protrusion (142) protrudes from the bottom wall of the first tube body (141), the heat exchanger comprises a bottom plate (2), the bottom plate (2) comprises a first limiting groove (21), the first limiting groove (21) is recessed in the upper wall of the bottom plate (2), and the first limiting protrusion is matched with the first limiting groove (21).

7. The heat exchanger according to claim 6, characterized in that The core (1) further comprises a second insert tube (15), the second insert tube (15) comprising a second tube body, the second tube body at least partially located in the second hole (132), the second tube body having a second circulation channel (151), the second circulation channel (151) being located between the adjacent first plate (11) and the second plate (12), the second circulation channel (151) being communicated with the first inter-plate channel; It is defined that the surface passing through the center line of the second tube body and extending in the length direction of the first plate (11) is the second surface, the sum of the flow areas of the first circulation channels (143) located between the second surface and the first isolation portion is S3, and the sum of the flow areas of the second circulation channels (151) located on the second surface away from the first isolation portion is S4, and S3<S4.

8. The heat exchanger according to claim 7, characterized in that The heat exchanger comprises a top plate (3), the top plate (3) comprising a third main body (31), a first flanged portion (32) and a second flanged portion (33); the third main body (31) comprises a first mounting hole and a second mounting hole; the first mounting hole is opposite to the first hole (131); the second mounting hole is opposite to the second hole (132); the first flanged portion (32) protrudes from the third main body (31); the second flanged portion (33) protrudes from the third main body (31); the first tube body (141) is provided with the first mounting hole; the first flanged portion (32) is sleeved on the first tube body (141); the first flanged portion (32) is welded to the first tube body (141); the second tube body is provided with the second mounting hole; the second flanged portion (33) is sleeved on the second tube body; the second flanged portion (33) is welded to the second tube body.

9. The heat exchanger according to claim 8, characterized in that The first plate (11) has a first convex rib (113), the first convex rib (113) protrudes from the first main body (111), the second plate (12) has a second convex rib (123), the second convex rib (123) protrudes from the second main body (121), the second convex rib (123) is partially arranged around the first convex rib (113), and the first convex rib (113) and the second convex rib (123) are welded; The first plate (11) has a third convex rib (114), the third convex rib (114) is located at one end of the first convex rib (113), the end of the third convex rib (114) away from the first convex rib (113) is substantially flush with a short side of the first main body (111), and the third convex rib (114) is welded to the second main body (121).

10. The heat exchanger according to claim 9, characterized in that The shortest distance between the long side of the first main body (111) and the first surface is L1, and the shortest distance between the third convex rib (114) and the first surface is L2, where L1=L2.

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