Plate-fin heat exchanger with uniform heat exchange

Abstract

The utility model provides a kind of plate-fin heat exchanger of uniform heat exchange, it is related to heat exchanger field, including heat exchange core, water inlet head and water outlet head;Water inlet head and water outlet head are respectively set in the two sides of heat exchange core;Water inlet head is equipped with inner cavity, and is provided with water inlet and water outlet;Inner cavity includes buffer chamber, distribution chamber and mixing chamber;Buffer chamber, distribution chamber and mixing chamber are sequentially arranged;Buffer chamber is communicated with water inlet;Mixing chamber is communicated with water outlet;Distribution chamber includes several shunt chambers;Shunt chamber both ends are respectively equipped with shunt inlet and shunt outlet;Shunt inlet is communicated with buffer chamber;Shunt outlet is communicated with mixing chamber.The utility model can solve the prior art when cooling liquid is transported to plate-fin heat exchanger to carry out heat exchange, the flow rate of cooling liquid near the position of inlet flange is larger, and the flow rate of cooling liquid far from the position of inlet flange is smaller, leading to cooling liquid distribution uneven in each inner passage, cannot effectively improve the problem of heat exchange efficiency.

Description

Technical Field

[0001] This utility model relates to the field of heat exchangers, and more particularly to a plate-fin heat exchanger with uniform heat exchange. Background Technology

[0002] Plate-fin heat exchangers typically consist of baffles, fins, seals, and end caps. Their structure can be referenced in Chinese patent application number 200910153125.7, which discloses a high-pressure aluminum plate-fin heat exchanger.

[0003] When using the plate-fin heat exchanger provided by this patent, the coolant enters the head cavity from the inlet flange, then enters the inner channel from the head cavity, where the coolant in the inner channel exchanges heat with the air in the outer channel, and then enters the head cavity on the other side and exits from the outlet flange. Because the head cavity needs to cover all the inner and outer channels on one side of the heat exchange core, the cross-section of the head cavity is large, while the cross-section of the inlet flange is small. As a result, the coolant entering the head cavity from the inlet flange has a higher flow velocity near the inlet flange and a lower flow velocity further away from the inlet flange. This leads to uneven distribution of the coolant in the various inner channels, which cannot effectively improve the heat exchange efficiency. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a plate-fin heat exchanger with uniform heat exchange. This solves the problem in existing technologies where, when coolant is supplied to a plate-fin heat exchanger for heat exchange, the flow velocity of the coolant is higher near the inlet flange and lower further away, resulting in uneven distribution of the coolant within the various internal channels and hindering effective heat exchange efficiency. The present invention achieves uniform distribution of coolant within each internal channel of the plate-fin heat exchanger, ensuring uniform heat exchange and effectively improving the heat exchange efficiency of the plate-fin heat exchanger.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: This utility model provides a plate-fin heat exchanger with uniform heat exchange, comprising a heat exchange core, an inlet end cap, and an outlet end cap; the inlet end cap and the outlet end cap are respectively disposed on both sides of the heat exchange core; the inlet end cap has an inner cavity; an inlet and an outlet are respectively opened on the opposite side walls of the inlet end cap; both the inlet and the outlet are connected to the inner cavity; the side of the inlet end cap with the outlet is connected to the heat exchange core; the inner cavity includes a buffer cavity, a distribution cavity, and a mixing cavity; the buffer cavity, the distribution cavity, and the mixing cavity are arranged sequentially; the buffer cavity is connected to the inlet; the mixing cavity is connected to the outlet; The distribution chamber includes several diversion chambers; each diversion chamber has a diversion inlet and a diversion outlet at both ends; the diversion inlet is connected to the buffer chamber; and the diversion outlet is connected to the mixing chamber.

[0006] The plate-fin heat exchanger with uniform heat exchange provided by this utility model preferably uses the branching cavity adjacent to the water inlet as the main branching cavity and the remaining branching cavities as auxiliary branching cavities; a first flow control net is provided at the branching inlet of the main branching cavity; and a second flow control net is provided at the branching inlet of the auxiliary branching cavity. The first flow control mesh has a plurality of first flow control holes; the second flow control mesh has a plurality of second flow control holes; the number of first flow control holes and second flow control holes are equal; the first flow control holes are smaller than the second flow control holes.

[0007] The plate-fin heat exchanger with uniform heat exchange provided by this utility model preferably has a flow guide shroud at the flow outlet of the main flow distribution chamber; the flow guide shroud is hemispherical; a plurality of flow distribution holes are opened on the flow guide shroud; the flow distribution holes are evenly distributed on the flow guide shroud; the axis of the flow distribution hole is perpendicular to the tangent plane at which it is located; the convex side of the flow guide shroud faces the mixing chamber.

[0008] The above technical solution has the following advantages or beneficial effects: The plate-fin heat exchanger with uniform heat exchange provided by this utility model is equipped with a buffer chamber connected to the inlet. The buffer chamber expands its volume to transform the coolant entering the inlet head in the form of a concentrated jet from the inlet into a diffused flow, initially reducing the coolant velocity near the inlet. Furthermore, the coolant in the buffer chamber is divided into multiple branches, which enter different distribution chambers, allowing the multiple coolant branches to flow independently and preventing the coolant from continuously concentrating in the middle part (near the inlet). This results in the coolant being relatively evenly distributed in each distribution chamber, reducing velocity accumulation in the middle part and balancing the overall coolant velocity. Furthermore, the fluids in each distribution chamber converge in the mixing chamber. Through momentum exchange between the fluids, i.e., the high-speed fluid drives the low-speed fluid, or the low-speed fluid hinders the high-speed fluid, uniform coolant velocity is achieved. In existing technologies, when coolant is delivered to a plate-fin heat exchanger, the flow velocity of the coolant is higher near the inlet flange and lower further away, resulting in uneven distribution of coolant within the internal channels and failing to effectively improve heat exchange efficiency. The plate-fin heat exchanger with uniform heat exchange provided by this invention addresses this by incorporating a buffer chamber to initially reduce the coolant velocity in the middle section, and by setting several diversion chambers to split the coolant within the buffer chamber into multiple streams, reducing velocity accumulation in the middle section. Furthermore, a mixing chamber allows for momentum exchange between coolants with different velocities, balancing the overall flow velocity and enabling the coolant to enter the heat exchange core at a uniform speed. This balances the heat exchange efficiency of each internal channel, thereby effectively improving the overall heat exchange efficiency of the plate-fin heat exchanger. Attached Figure Description

[0009] The present invention, its features, shape, and advantages will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like reference numerals denote like parts throughout the drawings. The drawings are not intentionally drawn to scale; the focus is on illustrating the gist of the invention.

[0010] Figure 1 This is a three-dimensional structural diagram of the plate-fin heat exchanger with uniform heat exchange provided in Embodiment 1 of this utility model.

[0011] Figure 2 This is a cross-sectional structural diagram of the water inlet seal in the plate-fin heat exchanger with uniform heat exchange provided in Embodiment 1 of this utility model. Detailed Implementation

[0012] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.

[0013] Example 1: like Figures 1-2 As shown in Embodiment 1 of this utility model, a plate-fin heat exchanger with uniform heat exchange is provided, including a heat exchange core 1, an inlet end cap 2, and an outlet end cap 3; the inlet end cap 2 and the outlet end cap 3 are respectively disposed on both sides of the heat exchange core 1; the inlet end cap 2 is provided with an inner cavity 21; an inlet 22 and an outlet 23 are respectively opened on the opposite side walls of the inlet end cap 2; both the inlet 22 and the outlet 23 are connected to the inner cavity 21; the side of the inlet end cap 2 with the outlet 23 is connected to the heat exchange core 1; the inner cavity 21 includes a buffer cavity 211, a distribution cavity 212, and a mixing cavity 213; the buffer cavity 211, the distribution cavity 212, and the mixing cavity 213 are arranged sequentially; the buffer cavity 211 is connected to the inlet 22; the mixing cavity 213 is connected to the outlet 23; The distribution chamber 212 includes several diversion chambers 2121; each diversion chamber 2121 has a diversion inlet 21211 and a diversion outlet 21212 at both ends; the diversion inlet 21211 is connected to the buffer chamber 211; and the diversion outlet 21212 is connected to the mixing chamber 213.

[0014] When using the plate-fin heat exchanger with uniform heat exchange provided in Embodiment 1 of this utility model, the inlet water seal 2 and the outlet water seal 3 are respectively connected to pipes through which coolant flows. Specifically, the coolant enters the inlet water seal 2 through the inlet 22 and flows into the buffer chamber 211. The coolant is buffered and its flow rate is reduced by the buffer chamber 211. Then, it is divided into multiple streams and enters multiple branch chambers 2121 through the branch inlet 21211. Then, it enters the mixing chamber 213 from the branch outlet 21212 and merges. It enters the inner channel of the heat exchange core 1 from the outlet 23. The coolant exchanges heat with the flowing air in the outer channel in the inner channel of the heat exchange core 1. After being cooled, the coolant enters the outlet water seal 3 and is discharged from the outlet water seal 3.

[0015] The present invention provides a plate-fin heat exchanger with uniform heat exchange in Embodiment 1. A buffer chamber 211 is provided, connected to the inlet 22. Through volume expansion, the buffer chamber 211 transforms the coolant entering the inlet head 2 from the inlet 22 in a concentrated jet form into a diffused flow, initially reducing the coolant velocity near the inlet 22. Furthermore, the coolant in the buffer chamber 211 is divided into multiple streams, each entering a different distribution chamber 2121, allowing the multiple coolant streams to flow independently. This prevents the coolant from continuously concentrating in the middle (near the inlet 22), resulting in a relatively uniform distribution of coolant in each distribution chamber 2121, reducing velocity accumulation in the middle and balancing the overall coolant velocity. Even further, the fluids in each distribution chamber 2121 converge in the mixing chamber 213. Through momentum exchange between the fluids—that is, high-speed fluid driving low-speed fluid, or low-speed fluid hindering high-speed fluid—uniform coolant velocity is achieved. In existing technologies, when coolant is delivered to a plate-fin heat exchanger for heat exchange, the flow velocity of the coolant is higher near the inlet flange and lower further away, resulting in uneven distribution of coolant in the various internal channels and failing to effectively improve heat exchange efficiency. The plate-fin heat exchanger with uniform heat exchange provided in Embodiment 1 of this utility model addresses this by setting a buffer chamber 211 to initially reduce the coolant flow velocity in the middle section, setting several diversion chambers 2121 to divide the coolant in the buffer chamber 211 into multiple branches, reducing velocity accumulation in the middle section, and setting a mixing chamber 213 to allow momentum exchange between coolants with different flow velocities, balancing the overall flow velocity of the coolant. This allows the coolant to enter the heat exchange core 1 at a uniform speed, balancing the heat exchange efficiency of each internal channel, thereby effectively improving the overall heat exchange efficiency of the plate-fin heat exchanger.

[0016] The plate-fin heat exchanger with uniform heat exchange provided in Embodiment 1 of this utility model preferably uses the branching chamber 2121 adjacent to the inlet 22 as the main branching chamber 2122 (high-velocity coolant) to further balance the flow rate of the coolant, and the remaining branching chambers 2121 as auxiliary branching chambers 2123 (low-velocity coolant). A first flow control net 21221 is provided at the branching inlet 21211 of the main branching chamber 2122, and a second flow control net 21231 is provided at the branching inlet 21211 of the auxiliary branching chambers 2123. Different flow control nets are set up to balance the flow velocity by utilizing the difference in flow resistance. Specifically, the first flow control net 21221 has a number of first flow control holes, and the second flow control net 21231 has a number of second flow control holes. The number of first flow control holes and second flow control holes are equal, and the first flow control holes are smaller than the second flow control holes. The main flow distribution cavity 2122 increases the flow resistance through the smaller diameter first flow control holes to reduce the fluid velocity in the central region, while the auxiliary flow distribution cavity 2123 reduces the flow resistance through the larger diameter second flow control holes to increase the fluid velocity in the edge region.

[0017] The plate-fin heat exchanger with uniform heat exchange provided in Embodiment 1 of this utility model preferably includes a flow guide shroud 21222 at the flow outlet 21212 of the main flow distribution chamber 2122 in order to further balance the flow velocity of the coolant. The flow guide shroud 21222 is hemispherical and has several flow diversion holes. The hemispherical structure can diffuse the coolant branch of the main flow distribution chamber 2122 to the surrounding areas, preventing the coolant branch from flowing continuously in the original velocity direction. The flow diversion holes are evenly distributed on the flow guide shroud 21222, which, together with the hemispherical structure, allows the coolant of the main flow distribution chamber 2122 to enter the mixing chamber 2123 evenly, and mixes better with the coolant of the auxiliary flow distribution chamber 2123, so as to reduce local flow velocity peaks. At the same time, multiple coolants flowing in different directions can form turbulence, further enhancing the heat exchange efficiency of the plate-fin heat exchanger. It should also be noted that, in order to achieve the above effect, the convex side of the flow guide 21222 should face the mixing chamber 213, and the axis of the flow divider should be perpendicular to its tangential plane, so as to ensure that the coolant spray direction of each flow divider is radially diverging along the flow guide 21222.

[0018] In summary, the plate-fin heat exchanger with uniform heat exchange provided by this utility model can solve the problem in the prior art where, when coolant is transported to a plate-fin heat exchanger for heat exchange, the flow velocity of the coolant is higher near the inlet flange and lower further away from the inlet flange, resulting in uneven distribution of coolant in each internal channel and failing to effectively improve heat exchange efficiency. This invention achieves uniform distribution of coolant in each internal channel of the plate-fin heat exchanger, ensuring uniform heat exchange and effectively improving the heat exchange efficiency of the plate-fin heat exchanger.

[0019] Those skilled in the art should understand that variations can be implemented by combining existing technology and the above embodiments, and will not be elaborated here. Such variations do not affect the substantive content of this utility model, and will not be elaborated here.

[0020] The preferred embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and the devices and structures not described in detail should be understood as being implemented in a conventional manner in the art; any possible variations and modifications made by those skilled in the art without departing from the technical solution of this utility model, or equivalent embodiments with equivalent changes, do not affect the essential content of this utility model. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from the content of the technical solution of this utility model, shall still fall within the protection scope of the technical solution of this utility model.

Claims

1. A plate-fin heat exchanger with uniform heat exchange, comprising a heat exchange core, an inlet end cap, and an outlet end cap; the inlet end cap and the outlet end cap are respectively disposed on both sides of the heat exchange core; the inlet end cap has an inner cavity; an inlet and an outlet are respectively provided on the opposite side walls of the inlet end cap; both the inlet and the outlet are in communication with the inner cavity; the side of the inlet end cap with the outlet is connected to the heat exchange core; characterized in that, The inner cavity includes a buffer cavity, a distribution cavity, and a mixing cavity; the buffer cavity, the distribution cavity, and the mixing cavity are arranged sequentially; the buffer cavity is connected to the water inlet; the mixing cavity is connected to the water outlet. The distribution chamber includes several diversion chambers; each diversion chamber has a diversion inlet and a diversion outlet at both ends; the diversion inlet is connected to the buffer chamber; and the diversion outlet is connected to the mixing chamber.

2. The plate-fin heat exchanger with uniform heat exchange as described in claim 1, characterized in that, The diversion chamber adjacent to the water inlet is designated as the main diversion chamber, and the remaining diversion chambers are designated as auxiliary diversion chambers; a first flow control net is provided at the diversion inlet of the main diversion chamber; a second flow control net is provided at the diversion inlet of the auxiliary diversion chambers; The first flow control mesh has a plurality of first flow control holes; the second flow control mesh has a plurality of second flow control holes; the number of first flow control holes and second flow control holes are equal; the first flow control holes are smaller than the second flow control holes.

3. The plate-fin heat exchanger with uniform heat exchange as described in claim 2, characterized in that, The main flow distribution chamber has a flow guide shroud at its flow outlet; the flow guide shroud is hemispherical; the flow guide shroud has several flow distribution holes; the flow distribution holes are evenly distributed on the flow guide shroud; the axis of the flow distribution holes is perpendicular to the tangent plane in which they are located; the convex side of the flow guide shroud faces the mixing chamber.

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