Heat exchanger

Abstract

The present application discloses a heat exchanger, comprising at least two first inter-plate channels and at least one fluid channel. The fluid channel is in communication with the at least two first inter-plate channels. The heat exchanger comprises liquid-collecting recesses. Each liquid-collecting recess is provided with an opening, and the opening faces the fluid channel. When the heat exchanger is in a working state, under the action of gravity, fluid entering the fluid channel falls into a liquid-collecting recess. When the height of the fluid in the liquid-collecting recess is greater than that of a bottom end of a channel wall forming the fluid channel, the fluid will enter an adjacent liquid-collecting recess by means of the fluid channel. When all of the liquid-collecting recesses in the heat exchanger are filled with the fluid, the fluid flows out of the liquid-collecting recesses, so that the distribution of the fluid between plates is more uniform, and thus, the heat exchange performance of the heat exchanger can be improved.

Description

heat exchanger

[0001] This application claims priority to Chinese Patent Application No. 202411318879.4, filed with the State Intellectual Property Office of China on September 20, 2024, entitled "Heat Exchanger," and Chinese Patent Application No. 202411038397.3, filed with the State Intellectual Property Office of China on July 30, 2024, entitled "Heat Exchanger," the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of thermal management technology, and more specifically, to heat exchangers. Background Technology

[0003] Plate heat exchangers consist of multiple stacked plates, with inter-plate channels formed between adjacent plates for fluid flow. Two fluids can flow on opposite sides of the plates to achieve heat exchange between the plates.

[0004] When a plate heat exchanger is used as an evaporator, the refrigerant cools the liquid. The liquid phase in the refrigerant evaporates from low dryness to high dryness or superheated gas. During heat exchange, the heat exchange performance of a uniformly mixed two-phase system is better than that of a single-phase liquid or single-phase gas. At low refrigerant flow rates, due to gravity, the liquid phase more easily enters the heat exchange zone through the corner holes in the channels between the first few plates, while the gas phase more easily enters the channels between the later plates. This can easily lead to uneven gas-liquid distribution between the plates, reducing heat exchange performance.

[0005] Application content

[0006] This application provides a heat exchanger that can improve the uniformity of gas-liquid distribution between plates.

[0007] To achieve the above objectives, this application provides the following technical solution:

[0008] A heat exchanger includes at least two first interplate channels and at least one fluid channel, the fluid channel communicating with at least two first interplate channels;

[0009] The heat exchanger includes a liquid collection tank with an opening facing the fluid channel.

[0010] The heat exchanger of this application includes a liquid collection tank, the opening of which faces the fluid channel. When the heat exchanger is in operation, under the action of gravity, the fluid entering the fluid channel falls into the liquid collection tank. When the height of the fluid in the liquid collection tank is greater than the bottom of the hole wall forming the fluid channel, the fluid will enter the adjacent liquid collection tank through the fluid channel. When all the liquid collection tanks in the heat exchanger are full of fluid, the fluid flows out from the liquid collection tank, thereby making the distribution of fluid between the plates more uniform and thus improving the heat exchange performance of the heat exchanger. Attached Figure Description

[0011] Figure 1 is a schematic diagram of the heat exchanger in Example 1;

[0012] Figure 2 is a schematic diagram of the heat exchange core of Figure 1 in Example 1;

[0013] Figure 3 is a schematic diagram of the structure of Example 1 in Figure 2 with the first side plate and the second plate hidden;

[0014] Figure 4 is a cross-sectional view of Figure 3 along the AA direction in Example 1;

[0015] Figure 5 is an enlarged view of point A in Figure 4 of Example 1;

[0016] Figure 6 is an exploded view of Figure 2 of Example 1;

[0017] Figure 7 is a schematic diagram of the structure of the first side plate in Figure 1 of Embodiment 1;

[0018] Figure 8 is a schematic diagram of the structure of the first plate in Figure 1 of Embodiment 1;

[0019] Figure 9 is a back view of Figure 8 of Example 1;

[0020] Figure 10 is a schematic diagram of the structure of the second plate in Figure 1 of Embodiment 1;

[0021] Figure 11 is a rear view of Figure 10 in Example 1;

[0022] Figure 12 is a schematic diagram of the structure of the second side plate of Figure 1 in Embodiment 1;

[0023] Figure 13 is a schematic diagram of the second embodiment of the flow-blocking part in Example 1;

[0024] Figure 14 is a structural schematic diagram of the third embodiment of the flow-blocking part in Example 1;

[0025] Figure 15 is a structural schematic diagram of Figure 14 from another perspective of Embodiment 1;

[0026] Figure 16 is a structural schematic diagram of the fourth embodiment of the flow-blocking part in Example 1;

[0027] Figure 17 is a structural schematic diagram of the fifth embodiment of the flow-blocking part in Example 1;

[0028] Figure 18 is a structural schematic diagram of the sixth embodiment of the flow-blocking part in Example 1;

[0029] Figure 19 is a structural schematic diagram of Figure 18 from another perspective of Embodiment 1;

[0030] Figure 20 is a structural schematic diagram of the seventh embodiment of the flow-blocking part in Example 1;

[0031] Figure 21 is a structural schematic diagram of the eighth embodiment of the flow-blocking part in Example 1;

[0032] Figure 22 is a structural schematic diagram of the ninth embodiment of the flow-blocking part in Example 1;

[0033] Figure 23 is a structural schematic diagram of Figure 22 from another perspective of Embodiment 1;

[0034] Figure 24 is a back view of Figure 22 of Example 1;

[0035] Figure 25 is a schematic diagram of the heat exchanger in Example 2;

[0036] Figure 26 is a schematic diagram of the structure of Example 2 with the drainage component hidden in Figure 25;

[0037] Figure 27 is a cross-sectional view along the AA direction of Figure 26 in Example 2;

[0038] Figure 28 is a structural schematic diagram of Figure 25 from another perspective in Embodiment 2;

[0039] Figure 29 is a cross-sectional view of Figure 28 along the BB direction in Example 2;

[0040] Figure 30 is an enlarged schematic diagram of point A in Figure 29 of Example 2;

[0041] Figure 31 is a cross-sectional structural schematic diagram of the first embodiment of the drainage component in Figure 25 of Example 2;

[0042] Figure 32 is a cross-sectional structural schematic diagram of the second embodiment of the drainage component in Figure 25 of Example 2;

[0043] Figure 33 is a schematic diagram of the heat exchange core in Figure 25 of Example 2;

[0044] Figure 34 is a cross-sectional schematic diagram of the first embodiment along the CC direction in Figure 33 of Example 2;

[0045] Figure 35 is a cross-sectional schematic diagram of the second embodiment along the CC direction in Figure 33 of Example 2;

[0046] Figure 36 is a schematic diagram of the structure in Example 2 where the extension length L2 of the diversion channel in Figure 25 is less than L1;

[0047] Figure 37 is a schematic diagram of the structure in Example 2 where the extension length L2 of the drainage channel in Figure 25 is equal to L1;

[0048] Figure 38 is a schematic diagram of the first embodiment of the drainage component in Figure 25 of Example 2;

[0049] Figure 39 is a structural schematic diagram of the cover plate of Figure 25 in Embodiment 2;

[0050] Figure 40 is a schematic diagram of the second embodiment of the drainage component in Figure 25 of Example 2;

[0051] Figure 41 is a schematic diagram of the structure of the drainage component with a distribution section in Figure 25 of Embodiment 2;

[0052] Figure 42 is a schematic diagram of the structure of the first plate in Figure 25 of Embodiment 2;

[0053] Figure 43 is a structural schematic diagram of Figure 36 from another perspective in Embodiment 2;

[0054] Figure 44 is a cross-sectional schematic diagram of the third embodiment along the CC direction in Figure 33 of Example 2. Detailed Implementation

[0055] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. Specific implementation schemes are as follows:

[0056] Example 1:

[0057] This embodiment discloses a heat exchanger 1, as shown in Figures 1-5, including a cover plate 2 and a heat exchange core 3. The cover plate 2 has a third inlet 58 and a third outlet 59. The heat exchange core 3 has a fluid channel 4, which includes a fluid inlet 5 and at least one fluid through hole 6. The heat exchange core 3 is provided with at least two first inter-plate channels 7 and at least one second inter-plate channel 8. The first inter-plate channels 7 and the second inter-plate channels 8 are isolated from each other and arranged alternately. The fluid channel 4 connects to at least two first inter-plate channels 7. Fluid enters the fluid channel 4 through the fluid inlet 5, and the fluid in the first inter-plate channel 7 and the fluid in the second inter-plate channel 8 exchange heat through the plate walls. The heat exchanger 1 includes a liquid collection tank 9. The liquid collecting tank 9 has a groove 10 facing the fluid channel 4; the plates forming the first inter-plate channel 7 include a first plate 11 and a second plate 12; the liquid collecting tank 9 includes a flow-blocking portion 13, one of the first plate 11 and the second plate 12 is fixedly connected to the flow-blocking portion 13 or is an integral structure, and the other of the first plate 11 and the second plate 12 is fixedly connected to the flow-blocking portion 13 or has a clearance fit or is an integral structure; the flow-blocking portion 13 has a first end 14 and a second end 15, and at least part of the wall of the fluid channel 4 is lower than the first end 14 and the second end 15 in the direction of gravity; along the direction of gravity, at least part of the flow-blocking portion 13 is located below the fluid channel 4. Since at least part of the orifice wall forming the fluid channel 4 is lower than the first end 14 and the second end 15 in the direction of gravity, the bottom of the orifice wall will be lower than the first end 14 and the second end 15 of the baffle 13. When the fluid enters the fluid channel 4, due to the bottom of the orifice wall being lower than the first end 14 and the second end 15 of the baffle 13, the fluid falls into the collection tank 9 under the action of gravity. When the height of the fluid in the collection tank 9 near the fluid inlet 5 is greater than the bottom of the orifice wall, the fluid will enter the adjacent collection tank 9 through the fluid channel 4. When all the collection tanks 9 in the heat exchanger 1 are filled with fluid, the fluid flows out from the collection tank 9, thereby making the distribution of fluid between the plates more uniform, which can improve the heat exchange performance of the heat exchanger.

[0058] In some embodiments, as shown in FIG3, the flow-blocking portion 13 includes a bottom wall portion 16 located between the first end portion 14 and the second end portion 15, with at least a portion of the bottom wall portion 16 arched away from the fluid channel 4. Thus, the partial arching of the bottom wall portion 16 away from the fluid channel 4 forms a groove structure capable of collecting fluid. After the groove is filled with fluid, the fluid flows through the fluid channel 4 into the adjacent collection tank 9.

[0059] Definition: The side of the plate facing the cover plate 2 is the first plate surface, and the other side of the plate is the second plate surface.

[0060] As shown in Figures 6 and 7, by way of example, the heat exchange core 3 includes a first side plate 17, a second side plate 18, at least two first plates 11, and at least two second plates 12. The first side plate 17 has a first inlet 21 and a first outlet 22.

[0061] As shown in Figures 8 and 9, exemplarily, the first plate 11 includes a first inlet corner hole 23, a first outlet corner hole 24, and a second inlet corner hole portion 25 and a second outlet corner hole portion 26 protruding from the first plate surface of the first plate 11. The second inlet corner hole portion 25 has a second inlet corner hole 27, and the second outlet corner hole portion 26 has a second outlet corner hole 28. As some embodiments, the first inlet corner hole 23 and the first outlet corner hole 24 are located on the same side of the first plate 11; the second inlet corner hole 27 and the second outlet corner hole 28 are located on the other side of the first plate 11. The first plate 11 also has a first bypass protrusion 37 protruding from the first plate surface of the first plate 11. The first bypass protrusion 37 extends along a first direction, and the second plate surface of the first plate 11 has a first recess corresponding to the first bypass protrusion 37. The first recess forms a first bypass groove 38, and the first bypass protrusion 37 and the first inlet corner hole 23 are located on the same side of the first plate 11.

[0062] As shown in Figures 10 and 11, by way of example, the second plate 12 includes a third inlet corner hole 31, a third outlet corner hole 32, and a fourth inlet corner hole portion 33 and a fourth outlet corner hole portion 34 protruding from the first plate surface of the second plate 12. The fourth inlet corner hole portion 33 has a fourth inlet corner hole 35, and the fourth outlet corner hole portion 34 has a fourth outlet corner hole 36. As some embodiments, the third inlet corner hole 31 and the third outlet corner hole 32 are located on the same side of the first plate 11; the fourth inlet corner hole 35 and the fourth outlet corner hole 36 are located on the other side of the first plate 11. The second plate 12 also includes a second bypass protrusion 29 protruding from the first plate surface of the second plate 12. The second bypass protrusion 29 extends along a first direction, and the second plate surface of the second plate 12 has a second recess corresponding to the second bypass protrusion 29. The second recess forms a second bypass groove 30, and the second bypass protrusion 29 and the third inlet corner hole 31 are located on the same side of the second plate 12.

[0063] As shown in Figure 12, by way of example, the second side plate 18 has a second inlet 39 and a second outlet 40.

[0064] In this embodiment, a first inter-plate channel 7 is formed between the first plate surface of the first plate 11 and the second plate surface of the second plate 12, and a second inter-plate channel 8 is formed between the second plate surface of the first plate 11 and the first plate surface of the second plate 12; a second inter-plate channel 8 is also formed between the second plate surface of the first side plate 17 and the first plate surface of the second plate 12; the assembly of the first side plate 17, the first plate 11, the second plate 12, and the second side plate 18 is specifically described as follows:

[0065] Assembly between the second plate surface of the first side plate 17 and the first plate surface of the second plate 12:

[0066] As shown in Figures 6, 10, and 11, exemplarily, the second surface of the first side plate 17 is disposed opposite to the first surface of the second plate 12. The fourth inlet corner hole 33 of the second plate 12 contacts and is fixed to the base plate of the first side plate 17 by welding; the fourth outlet corner hole 34 of the second plate 12 contacts and is fixed to the base plate of the first side plate 17 by welding. Simultaneously, the second bypass protrusion 29 of the second plate 12 contacts and is fixed to the base plate of the first side plate 17 by welding. The first inlet 21 of the first side plate 17 is aligned with and communicates with the fourth inlet corner hole 35 of the second plate 12 to form a fluid inlet 5, and the first outlet 22 of the first side plate 17 is aligned with and forms a fluid outlet with the fourth outlet corner hole 36 of the second plate 12. Thus, a second inter-plate channel 8 is formed between the second surface of the first side plate 17 and the first surface of the second plate 12.

[0067] Assembly between the second plate surface of the second plate 12 and the first plate surface of the first plate 11:

[0068] As shown in Figures 6, 8, and 9, exemplarily, the second surface of the second plate 12 is disposed opposite to the first surface of the first plate 11. The second inlet corner hole 25 of the first plate 11 contacts and is fixed to the base plate of the second plate 12 by welding, and the second inlet corner hole 27 of the first plate 11 is aligned with and communicates with the third inlet corner hole 31 of the second plate 12. The second outlet corner hole 26 of the first plate 11 contacts and is fixed to the base plate of the second plate 12 by welding, and the second outlet corner hole 28 of the first plate 11 is aligned with and communicates with the third outlet corner hole 32 of the second plate 12. Simultaneously, the first bypass protrusion 37 of the first plate 11 contacts and is fixed to the base plate of the second plate 12 by welding. The first inlet corner hole 23 of the first plate 11 is aligned with the fourth inlet corner hole 35 of the second plate 12, and the first outlet corner hole 24 of the first plate 11 is aligned with the fourth outlet corner hole 36 of the second plate 12; thus, a first inter-plate channel 7 is formed between the second plate surface of the second plate 12 and the first plate surface of the first plate 11.

[0069] Assembly between the first surface of the second plate 12 and the second surface of the first plate 11:

[0070] As shown in Figures 6, 8, and 9, exemplarily, the first surface of the second plate 12 is disposed opposite to the second surface of the first plate 11. The fourth inlet corner hole 33 of the second plate 12 contacts and is fixed to the base plate of the first plate 11 by welding, and the fourth inlet corner hole 35 of the second plate 12 is aligned with and communicates with the first inlet corner hole 23 of the first plate 11. The fourth outlet corner hole 34 of the second plate 12 contacts and is fixed to the base plate of the first plate 11 by welding, and the fourth outlet corner hole 36 of the second plate 12 is aligned with and communicates with the first outlet corner hole 24 of the first plate 11. Simultaneously, the second bypass protrusion 29 of the second plate 12 contacts and is fixed to the base plate of the first side plate 17 by welding. The first inlet corner hole 23 of the first plate 11 is aligned with and communicates with the fourth inlet corner hole 35 of the second plate 12, and the first outlet corner hole 24 of the first plate 11 is aligned with and communicates with the fourth outlet corner hole 36 of the second plate 12. In this way, a second interplate channel 8 is formed between the second plate surface of the first plate 11 and the first plate surface of the second plate 12.

[0071] Assembly between the first surface of the second side plate 18 and the second surface of the second plate 12:

[0072] As shown in Figures 6, 8, 9 and 12, by way of example, the first plate surface of the second side plate 18 is disposed opposite to the second plate surface of the second plate 12, the base plate portion of the second side plate 18 is in contact with the base plate portion of the second plate 12 and is fixed by welding, the second inlet 39 of the second side plate 18 is aligned with and communicates with the third inlet corner hole of the second plate 12, and the second outlet 40 of the second side plate 18 is aligned with and communicates with the third outlet corner hole of the second plate 12.

[0073] According to the above assembly method, the first side plate 17, the first plate 11, the second plate 12 and the second side plate 18 are assembled to form at least two first inter-plate channels 7 and at least one second inter-plate channel 8, and the first inter-plate channels 7 and the second inter-plate channels 8 are isolated from each other.

[0074] By way of illustration and not limitation, in this embodiment, the liquid collection tank 9 has a variety of configurations. For example, it can be formed by a protrusion and a pressure plate; or it can be formed by a liquid collection plate 45 and a pressure plate.

[0075] The liquid collection tank 9 is formed by a first pressure plate, a wall forming a protrusion, and a second pressure plate:

[0076] In the first embodiment, as shown in Figures 3, 6 and 8, the first plate 11 includes a first protrusion 41 protruding toward the first inter-plate channel 7. The side of the first protrusion 41 near the fluid channel 4 is a bottom wall portion 16, and the side of the first protrusion 41 away from the first plate 11 abuts against or is welded to the second plate 12. The first protrusion 41 can be formed by stamping or can be fixedly connected to the first plate 11 by welding. Compared with the welding and fixing of the first protrusion 41 to the first plate 11, the first protrusion 41 can be formed simultaneously with other components of the first plate 11 (such as bypass portions, corner holes, etc.) by stamping in one go, which has high precision and simplifies the process, eliminating the need for additional welding.

[0077] In the second embodiment, as shown in FIG13, the second plate 12 includes a second protrusion 42 protruding toward the first inter-plate channel 7. The side of the second protrusion 42 near the fluid channel 4 is the bottom wall portion 16, and the side of the second protrusion 42 away from the second plate 12 abuts or is welded to the first plate 11. The second protrusion 42 has the same technical effect as the first protrusion 41 in the first embodiment, and will not be described again here.

[0078] In the third embodiment, as shown in Figures 14 and 15, the bottom wall portion 16 includes a first bottom wall portion 43 and a second bottom wall portion 44; the first plate 11 includes a first protrusion 41 protruding towards the first inter-plate channel 7, with the side of the first protrusion 41 near the fluid channel 4 forming the first bottom wall portion 43; the second plate 12 includes a second protrusion 42 protruding towards the first inter-plate channel 7, with the side of the second protrusion 42 near the fluid channel 4 forming the second bottom wall portion 44; the first protrusion 41 and the second protrusion 42 are abutted or welded together. The first protrusion 41 can be formed by stamping or fixedly connected to the first plate 11 by welding; compared to welding the first protrusion 41 to the first plate 11, the first protrusion 41 can be formed simultaneously with other components of the first plate 11 (such as bypass portions, corner holes, etc.) in a single stamping process, achieving high precision and simplifying the process without requiring additional welding. Similarly, the second protrusion 42 can also be formed by stamping or fixedly connected to the second plate 12 by welding, and its technical effect is the same as that of the first protrusion 41 in this embodiment.

[0079] In the fourth embodiment, as shown in FIG16, the first plate 11 includes at least two third protrusions 55 protruding toward the first inter-plate channel 7. The two adjacent third protrusions 55 are fitted with a clearance, and the third protrusions 55 abut against or are welded to the second plate 12. The side of the third protrusion 55 near the fluid channel 4 forms a partial bottom wall portion 16. In this way, a plurality of third protrusions 55 are arranged sequentially to form a discontinuous flow-blocking portion 13. The third protrusions 55 can be formed by stamping or fixedly connected to the first plate 11 by welding. Compared with the welding and fixing of the third protrusions 55 to the first plate 11, the third protrusions 55 can be formed simultaneously with other components of the first plate 11 (such as bypass portions, corner holes, etc.) in a single stamping, which has high precision and simplifies the process, eliminating the need for additional welding.

[0080] In the fifth embodiment, as shown in FIG17, the second plate 12 includes at least two fourth protrusions 56 protruding toward the first inter-plate channel 7. The two adjacent fourth protrusions 56 are fitted with a clearance, and the fourth protrusions 56 abut against or are welded to the first plate 11. The side of the fourth protrusion 56 near the fluid channel 4 forms a partial bottom wall portion 16. The fourth protrusion 56 has the same technical effect as the third protrusion 55 in the fourth embodiment, and will not be described again here.

[0081] In the sixth embodiment, as shown in Figures 18-19, the bottom wall portion 16 includes a first bottom wall portion 43 and a second bottom wall portion 44; the first plate 11 includes at least two third protrusions 55 protruding towards the first inter-plate channel 7, with adjacent third protrusions 55 in clearance fit, and the side of the third protrusion 55 near the fluid channel 4 forming a portion of the first bottom wall portion 43; the second plate 12 includes at least two fourth protrusions 56 protruding towards the first inter-plate channel 7, with adjacent fourth protrusions 56 in clearance fit, and the side of the fourth protrusion 56 near the fluid channel 4 forming a portion of the second bottom wall portion 44; the third protrusions 55 and the fourth protrusions 56 are abutted or welded together. The third protrusions 55 can be formed by stamping or fixedly connected to the first plate 11 by welding; compared to welding the third protrusions 55 to the first plate 11, the third protrusions 55 can be formed simultaneously with other components of the first plate 11 (such as bypass portions, corner holes, etc.) in a single stamping process, achieving high precision and simplifying the process without requiring additional welding. Similarly, the fourth protrusion 56 can also be formed by stamping or fixedly connected to the second plate 12 by welding, and its technical effect is the same as that of the third protrusion 55 in this embodiment.

[0082] The liquid collection tank 9 is formed by the liquid collection plate 45, the first pressure plate, and the second pressure plate:

[0083] In the seventh embodiment, as shown in FIG20, the flow-blocking part 13 is a liquid collecting plate 45, and the side of the liquid collecting plate 45 near the fluid channel 4 is the bottom wall part 16; one of the first plate 11 and the second plate 12 is fixedly connected to the liquid collecting plate 45, and the other of the first plate 11 and the second plate 12 is fixedly connected to the liquid collecting plate 45 or clearance-fitted. The liquid collecting plate 45 is fixed between the first plate 11 and the second plate 12 by welding. The liquid collecting plate 45, part of the first plate 11 and part of the second plate 12 enclose a liquid collecting groove 9, which has a simple structure.

[0084] Alternatively, the liquid collection tank 9 can also be formed by a bypass tank, a first pressure plate, and a second pressure plate:

[0085] In the eighth embodiment, as shown in Figures 2, 4, 5, and 21-24, the direction of the line connecting the center of the first inlet 21 and the center of the first outlet 22 is defined as the third direction X, and the direction perpendicular to the third direction X is defined as the fourth direction Y. The heat exchanger 1 further includes at least one second interplate channel 8. One of the first plate 11 and the second plate 12 has a first bypass protrusion 37 protruding toward the first interplate channel 8. The other of the first plate 11 and the second plate 12 abuts or is fixedly connected to the first bypass protrusion 37. The first bypass protrusion 37 forms a first bypass groove 38 in the second interplate channel 8. 37 includes a first bypass portion 46 and a second bypass portion 47. The first bypass portion 46 extends along the fourth direction Y, and the second bypass portion 47 extends along the third direction X. A baffle plate 48 is fixed to the end of the first bypass portion 46 away from the second bypass portion 47. The side of the baffle plate 48 near the fluid channel 4 is a baffle wall portion 49, and the side of the first bypass portion 46 near the fluid channel 4 is a first bypass wall portion 50. The bottom wall portion 16 includes the baffle wall portion 49 and the first bypass wall portion 50. Alternatively, as shown in FIG22, the end of the first bypass portion 46 away from the second bypass portion 47 extends upward, and the side of the first bypass portion 46 near the fluid channel 4 is the bottom wall portion 16. The first bypass protrusion 37 forms a first bypass groove 38 in the second inter-plate channel 8, which is beneficial to the uniform distribution of fluid in the distribution area 53 in the second inter-plate channel 8. The first bypass protrusion 37 cooperates with the plate in the first inter-plate channel 7 to form a liquid collection groove 9, making the distribution of fluid between the plates more uniform. Furthermore, the first interplate channel 7 has a heat exchange zone 52 and a distribution zone 53. The first end 14 is close to the heat exchange zone 52, and the second end 15 is connected to the second bypass section 47. The line connecting the first end 14 and the center of the fluid through-hole 6 extends in the first direction, and the angle between the first direction and the vertical direction is α, with the angle α ranging from 15° to 145°. In this way, the liquid level can be blocked, preventing the liquid level at the inlet from being high and the flow rate from being fast when the refrigerant flow is large, thus avoiding easy entry into the subsequent first interplate channel 7.

[0086] Preferably, as shown in Figure 13, in the first, second, third, fourth, fifth, sixth, and seventh embodiments, the first interplate channel 7 has a heat exchange zone 52 and a distribution zone 53. The first end 14 is close to the heat exchange zone 52, and the second end 15 is far from the heat exchange zone 52. The line connecting the first end 14 and the center of the fluid through-hole 6 extends in a first direction, and the angle between the first direction and the direction of gravity is α, with the angle ranging from 15° to 145°. The line connecting the second end 15 and the center of the fluid through-hole 6 extends in a second direction, and the angle between the second direction and the direction of gravity is β, with the angle ranging from 15° to 145°. This achieves the effect of blocking the liquid level, preventing the high liquid level and fast flow velocity at the inlet when the refrigerant flow rate is large, which would easily allow it to enter the subsequent first interplate channel 7. Furthermore, α and β satisfy the following relationship: α < β. This allows more fluid to flow to the heat exchange zone 52, thereby improving heat exchange efficiency.

[0087] In this embodiment, as shown in FIG8, the first plate 11 further includes a plurality of protrusions 54 surrounding the fluid channel 4; or, the second plate 12 includes a plurality of protrusions 54 surrounding the fluid channel 4. The fluid entering the fluid channel 4 includes both gas and liquid phases. The arrangement of these protrusions 54 can improve the distribution of the gas phase within the first plate channel 7. In addition, the protrusions 54 can also serve as supports, resisting pressure and bursting.

[0088] Example 2:

[0089] This embodiment discloses a heat exchanger 1, as shown in Figures 25-30 and 39, which includes a cover plate 16' and a heat exchange core 8'. The cover plate 16' has a first inlet 5' and a first outlet 28'. The heat exchange core 8' has a fluid channel 2', which includes at least one fluid through hole 9'. The heat exchange core 8' is provided with at least two first inter-plate channels 3' and at least one second inter-plate channel 27'. The first inter-plate channels 3' and the second inter-plate channels 27' are isolated from each other and arranged alternately. The fluid through hole 9' connects two adjacent first inter-plate channels 3'. Fluid enters the fluid channel 2', and the fluid in the first inter-plate channel 3' and the fluid in the second inter-plate channel 27' exchange heat through the plate walls.

[0090] In this embodiment, as shown in Figures 27-30, the heat exchanger 1 further includes a flow guide 4', which is at least partially located within the fluid channel 2' and is close to the first inlet 5'. The flow guide 4' is fixedly connected, interference-fitted, or clearance-fitted to the wall of the fluid channel 2'. The flow guide 4' has a flow channel 6', which communicates with the first inlet 5'. Fluid enters the fluid channel 2' through the first inlet 5'. Because the flow guide 4' is close to the first inlet 5', some fluid will enter the flow channel 6' of the flow guide 4'. Under the guidance of the flow channel 6', the fluid entering the flow channel 6' flows away from the first inlet 5', thereby improving the uniformity of fluid distribution between the plates and thus improving the heat exchange performance of the heat exchanger 1.

[0091] In the above technical solution, as shown in Figures 30-32, the flow guide 4' is a non-tubular structure. The flow guide groove 6' of the flow guide 4' has a groove opening 23', which faces the first inter-plate channel 3' and extends axially along the fluid channel 2'. Fluid in the flow guide groove 6' can enter the first inter-plate channel 3' through the groove opening 23'. There are no particular restrictions on the shape of the wall forming the flow guide groove 6', as long as the flow guide effect can be achieved. For example, as shown in Figures 30-32, the wall forming the flow guide groove 6' is arc-shaped or concave along the axial direction of the fluid channel 2'. In this way, the arc-shaped or concave groove wall can cause some fluid to flow away from the first inlet 5' into the first inter-plate channel 3', achieving the flow guide effect and thus improving the uniformity of fluid distribution between the plates.

[0092] As shown in Figures 31-35, the first interplate channel 3' includes a heat exchange zone 7' and a distribution zone. The distribution zone includes a first distribution zone 24' and a second distribution zone 25', with the heat exchange zone 7' located between the first distribution zone 24' and the second distribution zone 25'. The opening 23' of the guide channel 6' faces the heat exchange zone 7'. The fluid in the first interplate channel 3' and the fluid in the second interplate channel 27' exchange heat through the partition wall, with the heat exchange mainly concentrated in the heat exchange zone 7'. The opening 23' of the guide channel 6' faces the heat exchange zone 7', thus allowing more fluid to flow towards the heat exchange zone 7', thereby improving the heat exchange performance of the heat exchanger 1.

[0093] More specifically, as shown in Figures 33-34, the cross-section of the flow channel 6' is perpendicular to the axial direction of the fluid channel 2'. It has a first end 10' and a second end 11'. The first end 10' is close to the heat exchange zone 7', and the second end 11' is far from the heat exchange zone 7'. The line connecting the center of the first end 10' and the center of the fluid through hole 9' extends in a first direction, and the line connecting the center of the second end 11' and the center of the fluid through hole 9' extends in a second direction. The angle between the first direction and the direction of gravity is α, and the angle between the second direction and the direction of gravity is... The included angle is β. The height of the first end 10' and the second end 11' in the direction of gravity affects the flow of fluid. The size of the included angle α affects the height of the first end 10' in the direction of gravity. Similarly, the size of the included angle β affects the height of the second end 11' in the direction of gravity. The smaller the included angle, the smaller the height of the corresponding end in the direction of gravity, and the more easily the fluid flows towards the end with the smaller included angle. The included angle α and included angle μ satisfy the following relationship: α < β. In this way, more fluid can flow to the heat exchange zone 7', thereby improving the heat exchange efficiency.

[0094] The size of the flow cross-sectional area affects the fluid velocity; a larger flow cross-sectional area results in a lower velocity, and vice versa. As shown in Figure 44, the fluid channel 2' includes a first channel 12' and a second channel 13', located on both sides of the guide member 4'. The first channel 12' includes at least a portion of the guide groove 6'. The flow cross-sectional area of ​​the fluid channel 2' is S1, and the flow cross-sectional area of ​​the first channel 12' is S2. S1 and S2 satisfy the following relationship: 1 / 4S1 < S2 < 2 / 3S1. Thus, in the case of low-velocity fluid, by reducing the flow cross-sectional area, the fluid velocity can be increased, thereby causing the fluid to flow away from the first inlet 5'.

[0095] It should be noted that the fluid entering fluid channel 2' includes both gas and liquid phases, which are not completely separated. In fact, the fluid entering fluid channel 2' also includes a gas-liquid mixture. The heat transfer performance of a uniformly mixed two-phase refrigerant is superior to that of a single-phase liquid or single-phase gas.

[0096] As shown in Figures 28-30, the end of the drainage channel 6' near the first inlet 5' can have a gap with the wall forming the first inlet 5'. Fluid enters the fluid channel 2' through the first inlet 5', with some fluid falling directly into the first inter-plate channel 3' near the first inlet 5' due to gravity, and some fluid entering the drainage channel 6'. Under the guidance of the drainage channel 6', it flows away from the first inlet 5', thereby improving the uniformity of fluid distribution between the plates. Of course, as shown in Figure 36, the end of the drainage channel 6' near the first inlet 5' can... With no gap between the fluid and the wall forming the first inlet 5', the fluid enters the fluid channel 2' directly into the guide groove 6' and flows away from the first inlet 5' under the guidance of the guide groove 6'. Some of the fluid that enters the fluid channel 2' through the first inlet 5' flows out from the guide groove 6' and enters the first interplate channel 3' close to the first inlet 5'. Under the guidance of the guide groove 6', some of the fluid enters the first interplate channel 3' away from the first inlet 5', which can also achieve uniform distribution of fluid between the plates.

[0097] In the above technical solution, the extension length of the flow channel 6' can be less than the extension length of the fluid channel 2', or it can be greater than or equal to the extension length of the fluid channel 2'. More specifically, as shown in Figures 36, 37, and 43, the heat exchanger 1 also includes a first side plate 17', with the first inlet 5' and the first side plate 17' located at both ends of the flow channel 6'; the wall forming the first inlet 5' includes an outer end and an inner end 14', with the inner end 14' close to the first side plate 17', and the distance between the inner end 14' and the first side plate 17' is L1. The flow channel 6' extends from the first inlet 17' towards the first side plate 17', and the extension length of the flow channel 6' is L2. L1 and L2 satisfy the following relationship: 1 / 2L1≤L2≤L1. When 1 / 2L1≤L2<L1, that is, the extension length of the drainage channel 6' is less than the extension length of the fluid channel 2', some fluid flows towards the first side plate 17' under the guidance of the drainage channel 6'. After flowing out from the port of the drainage channel 6', the fluid enters the first inter-plate channel 3' away from the first inlet 5' under the action of gravity. When L1=L2, that is, the extension length of the drainage channel 6' is equal to the extension length of the fluid channel 2', the fluid entering the fluid channel 2' first accumulates in the drainage channel 6'. When the height of the fluid in the direction of gravity is greater than the first end 10' or the second end 11' of the drainage channel 6', the fluid overflows from the drainage channel 6' and enters the first inter-plate channel 3', thereby improving the uniformity of fluid distribution between the plates.

[0098] For example, as shown in Figures 37, 38, and 40, the wall forming the drainage groove 6' is fixedly connected to or clearance-fitted with the first side plate 17'; or, the end of the wall forming the drainage groove 6' away from the ring body 15' is fixedly or integrally formed with a baffle portion 19'. In this way, the end of the drainage groove 6' away from the first inlet 5' can form a closed structure, thereby concentrating the fluid flow into the first interplate channel 8'.

[0099] In this embodiment, as shown in FIG36, the wall forming the drainage groove 6' is fixed or integrally formed with an annular body 15', and at least a portion of the wall forming the first inlet 5' is fixedly connected or interference-fitted to the annular body 15'. Thus, the annular body 15' facilitates the assembly of the drainage member 4' with the wall forming the first inlet 5'. More specifically, the cover plate 16' has a first inlet 5', the annular body 15' extends into the first inlet 5', and at least a portion of the wall forming the first inlet 5' is fixedly connected or interference-fitted to the annular body 15'. This strengthens the fixation of the drainage member 4' within the fluid channel 2'. When the annular body 15' is interference-fitted to the wall forming the first inlet 5', the wall forming the fluid channel 2' can be clearance-fitted to the drainage member 4' without requiring a fixed or interference-fitted connection; that is, the annular body 15' only needs to be fixedly connected to the cover plate 16', thereby simplifying assembly.

[0100] It should be noted that the fluid entering the fluid channel 2' includes both gas and liquid phases. The liquid phase flows out from the guide groove 6' and enters the first interplate channel 3', while the gas phase enters the first interplate channel 3' from above the guide groove 6'. In order to improve the uniformity of the gas phase fluid within the plate, the technical solution of this application designs a distribution structure, as described below:

[0101] In some embodiments, as shown in FIG41, an exemplary ring 15' is fixed or integrally formed with a distribution portion 18', the distribution portion 18' having a plurality of distribution ports 26', the distribution ports 26' communicating with the guide groove 6' and the first inter-plate channel 3'; the distribution ports 26' are arranged circumferentially at intervals along the ring 15' and extend axially along the fluid channel 2'. The fluid entering the fluid channel 2' includes gas phase and liquid phase, and the arrangement of these distribution ports 26' can improve the distribution of gas phase in the first inter-plate channel 3'. Furthermore, the distribution ports 26' extend from one end of the fluid channel 2' to the other end of the fluid channel 2'; thus, the gas phase fluid passes through the distribution ports 26' into each first inter-plate channel 3', thereby making the inter-plate distribution of the heat exchanger 1 more uniform.

[0102] In other embodiments, as shown in FIG42, for example, the first plate 20' further includes a plurality of protrusions 22' protruding toward the second plate 21', the plurality of protrusions 22' surrounding the fluid through-hole 9', with gaps between adjacent protrusions 22'; or, the second plate 21' includes a plurality of protrusions 22' protruding toward the first plate 20', the plurality of protrusions 22' surrounding the fluid through-hole 9', with gaps between adjacent protrusions 22'. Gaseous fluid passes through the gaps between adjacent protrusions 22' into each first interplate channel 3'. The arrangement of these protrusions 22' can improve the distribution of the gaseous phase within the first interplate channel 3'. In addition, the protrusions 22' can also serve a supporting function, resisting pressure and bursting.

[0103] The technical features of the above-described technical solutions can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above-described technical solutions are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0104] The technical solutions described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and controls without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the scope of protection of this patent application should be determined by the appended claims.

Claims

1. A heat exchanger, characterised in that: The heat exchanger (1) comprises at least two first inter-plate channels (7) and at least one fluid hole (4) which communicates with the at least two first inter-plate channels (7); The heat exchanger (1) comprises a collecting groove (9) which has a groove opening (10) facing the fluid hole (4).

2. The heat exchanger of claim 1, wherein: The plate forming the first inter-plate channel (7) comprises a first plate (11) and a second plate (12); the collecting groove (9) comprises a flow blocking part (13), one of the first plate (11) and the second plate (12) is fixedly connected with the flow blocking part (13) or is an integral structure, and the other of the first plate (11) and the second plate (12) is fixedly connected with the flow blocking part (13) or is a clearance fit or an integral structure; The flow blocking part (13) has a first end part (14) and a second end part (15), and a hole wall forming the fluid hole (4) is at least partially lower than the first end part (14) and the second end part (15) in the direction of gravity; at least part of the flow blocking part (13) is located below the fluid hole (4) in the direction of gravity.

3. The heat exchanger of claim 1, wherein: The heat exchanger (1) further comprises a flow guide (4') which is at least partially located in the fluid hole (2'); the heat exchanger (1) has a first inlet (5'), and the flow guide (4') is close to the first inlet (5'); The flow guide (4') is fixedly connected, interference connected or clearance fit with the hole wall forming the fluid hole (2'); the flow guide (4') has the collecting groove (6') which communicates with the first inlet (5').

4. The heat exchanger of claim 3, wherein: The fluid hole (2') comprises a first hole (12') which comprises at least part of the collecting groove (6'); the fluid hole (2') has a flow passage cross-sectional area S1, and the first hole (12') has a flow passage cross-sectional area S2, and S1 and S2 satisfy the following relationship: 1 / 4S1 < S2 < 2 / 3S1.

5. The heat exchanger of claim 4, wherein: The wall forming the collecting groove (6') is fixedly connected or clearance fit with the first side plate (17'); or, the wall forming the collecting groove (6') is fixed or integrally formed with a baffle part (19') at an end away from the first inlet (5').

6. The heat exchanger of claim 5, wherein: The wall forming the collecting groove (6') is fixed or integrally formed with a ring body (15'); the heat exchanger (1) further comprises a cover plate (16') which has the first inlet (5'), and the wall forming the first inlet (5') is at least partially fixedly connected or interference connected with the ring body (15').

7. The heat exchanger of claim 6, wherein: The ring body (15') is fixed or integrally formed with a distribution part (18') which has a plurality of distribution openings (26') which communicate the collecting groove (6') with the first inter-plate channel (3'); the distribution openings (26') are arranged in a circumferential direction of the ring body (15'), and the distribution openings (26') extend in an axial direction of the fluid hole (2').

8. The heat exchanger of claim 2, wherein: The baffle (13) comprises a bottom wall portion (16) located between the first end portion (14) and the second end portion (15), and at least part of the bottom wall portion (16) is arched towards the direction away from the fluid channel (4).

9. The heat exchanger of claim 8, wherein: The first plate (11) comprises a first protruding portion (41) protruding towards the first inter-plate passage (7), and the first protruding portion (41) is in abutment or welded with the second plate (12), and the side of the first protruding portion (41) close to the fluid channel (4) is the bottom wall portion (16); Alternatively, the second plate (12) comprises a second protruding portion (42) protruding towards the first inter-plate passage (7), and the second protruding portion (42) is in abutment or welded with the first plate (11); and the side of the second protruding portion (42) close to the fluid channel (4) is the bottom wall portion (16); Alternatively, the bottom wall portion (16) comprises a first bottom wall portion (43) and a second bottom wall portion (44); the first plate (11) comprises a first protruding portion (41) protruding towards the first inter-plate passage (7), and the side of the first protruding portion (41) close to the fluid channel (4) is the first bottom wall portion (43); the second plate (12) comprises a second protruding portion (42) protruding towards the first inter-plate passage (7), and the side of the second protruding portion (42) close to the fluid channel (4) is the second bottom wall portion (44); and the first protruding portion (41) is in abutment or welded with the second protruding portion (42).

10. The heat exchanger of claim 8, wherein: The baffle (13) is a liquid collecting plate (45), and the side of the liquid collecting plate (45) close to the fluid channel (4) is the bottom wall portion (16); one of the first plate (11) and the second plate (12) is fixedly connected with the liquid collecting plate (45), and the other of the first plate (11) and the second plate (12) is fixedly connected or gap-fitted with the liquid collecting plate (45).

11. The heat exchanger of claim 8, wherein: The first plate (11) comprises at least two third protruding portions (55) protruding towards the first inter-plate passage (7), and adjacent two third protruding portions (55) are gap-fitted, and the third protruding portions (55) are in abutment or welded with the second plate (12), and the side of the third protruding portions (55) close to the fluid channel (4) forms part of the bottom wall portion (16); Alternatively, the second plate (12) comprises at least two fourth protruding portions (56) protruding towards the first inter-plate passage (7), and adjacent two fourth protruding portions (56) are gap-fitted, and the fourth protruding portions (56) are in abutment or welded with the first plate (11); and the side of the fourth protruding portions (56) close to the fluid channel (4) forms part of the bottom wall portion (16); Alternatively, the bottom wall portion (16) comprises a first bottom wall portion (43) and a second bottom wall portion (44); the first plate (11) comprises a third protrusion (55) protruding towards the first inter-plate passage (7), two adjacent third protrusions (55) are in clearance fit, and the third protrusion (55) forms part of the first bottom wall portion (43) on one side close to the fluid channel (4); the second plate (12) comprises a fourth protrusion (56) protruding towards the first inter-plate passage (7), two adjacent fourth protrusions (56) are in clearance fit, and the fourth protrusion (56) forms part of the second bottom wall portion (44) on one side close to the fluid channel (4); the third protrusion (55) and the fourth protrusion (56) are in abutment or welded and fixed.

12. The heat exchanger according to any one of claims 2, 8 to 11, characterized in that: The first inter-plate passage (7) has a heat exchange zone (52), the first end portion (14) is close to the heat exchange zone (52), and the second end portion (15) is away from the heat exchange zone (52); the fluid channel (4) comprises at least one fluid through hole (6), the extension direction of the line connecting the first end portion (14) and the center of the fluid through hole (6) is the first direction, the included angle between the first direction and the direction of gravity is α, and the angle range of the angle α is 15°-145°; the extension direction of the line connecting the second end portion (15) and the center of the fluid through hole (6) is the second direction, the included angle between the second direction and the vertical direction is β, and the angle range of the angle β is 15°-145°.

13. The heat exchanger of claim 8, wherein: The heat exchanger (1) has a first inlet (21) and a first outlet (22), and the extension direction of the line connecting the center of the first inlet (21) and the center of the first outlet (22) is the third direction X, and the direction perpendicular to the third direction X is the fourth direction Y; The heat exchanger (1) further comprises at least one second inter-plate passage (8), one of the first plate (11) and the second plate (12) has a first bypass protrusion (37) protruding towards the first inter-plate passage (7), and the other of the first plate (11) and the second plate (12) is in abutment or fixed connection with the first bypass protrusion (37); the first bypass protrusion (37) comprises a first bypass portion (46) and a second bypass portion (47), the first bypass portion (46) extends along the fourth direction Y, and the second bypass portion (47) extends along the third direction X; The first bypass portion (46) is fixed with a baffle plate (48) at one end away from the second bypass portion (47), the baffle plate (48) has a baffle wall portion (49) on one side close to the fluid channel (4), the first bypass portion (46) has a first bypass wall portion (50) on one side close to the fluid channel (4), and the bottom wall portion (16) comprises the baffle wall portion (49) and the first bypass wall portion (50); Alternatively, the first bypass portion (46) extends upward away from one end of the second bypass portion (47), and the first bypass portion (46) is adjacent to the bottom wall portion (16) on one side of the fluid channel (4).

14. The heat exchanger of claim 13, wherein: The first inter-plate channel (7) has a heat exchange zone (52), and the first end portion (14) is adjacent to the heat exchange zone (52); the fluid channel (4) comprises at least one fluid through hole (6), and the extension direction of the line connecting the first end portion (14) and the center of the fluid through hole (6) is a first direction, the included angle between the first direction and the vertical direction is α, and the angle range of the α is 15°-145°.

15. The heat exchanger according to any one of claims 1 to 14, characterized in that: The plate piece forming the first inter-plate channel (3') comprises a first plate piece (20') and a second plate piece (21'); the first plate piece (20') comprises a plurality of protrusions (22') protruding towards the second plate piece (21'), the plurality of protrusions (22') surround the fluid through hole (9'), and the adjacent protrusions (22') have gaps therebetween; or, the second plate piece (21') comprises a plurality of protrusions (22') protruding towards the first plate piece (20'), the plurality of protrusions (22') surround the fluid through hole (9'), and the adjacent protrusions (22') have gaps therebetween.

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