Corrugated heat exchanger with flow guide holes

Abstract

The utility model relates to the field of heat exchangers, and provides a flow guide hole corrugated heat exchanger, which is characterized in that at least one layer of corrugated fins or flat fins with certain corrugation shapes is arranged between two adjacent corrugated partition plates with certain corrugation shapes to form a heat exchange corrugated plate bundle with certain corrugation shapes. Heat exchange medium flow guide holes are formed in the corrugated fins or the flat plate fins, and the same heat exchange medium shuttles back and forth between the two faces of at least one layer of corrugated fins or flat plate fins through the flow guide holes. The structure of the flow guide hole corrugated heat exchanger and the structure of the plate-fin heat exchanger are roughly the same, but the functions of the corrugated fins and the functions of the partition plates are completely opposite, and the secondary heat exchange fin surface area of the plate-fin heat exchanger is converted into the primary heat exchange surface area of the flow guide hole corrugated heat exchanger. The secondary heat exchange surface area of the plate-fin heat exchanger is far larger than the primary heat exchange surface area, and therefore the heat exchange efficiency of the corrugated heat exchanger is improved to a new step on the basis of the heat exchange efficiency of an existing plate-fin heat exchanger.

Description

Technical Field

[0001] The utility model application relates to the field of heat exchangers, in particular to a plate-fin heat exchanger. Background Art

[0002] A heat exchanger is a space in which two or more fluids at different temperatures are separated by heat exchange walls. Heat is exchanged between two or more fluids at different temperatures through heat conduction through the heat exchange walls and fins.

[0003] The existing plate-fin heat exchanger is mainly composed of a straight partition, a fin with a certain corrugated shape, a seal, and a guide vane. A corrugated fin, a guide vane and a seal are arranged between two adjacent straight partitions to form a sandwich. Such a sandwich is stacked in different ways according to different working conditions of various heat exchange fluids, brazed into a whole, and forms a plate-fin heat exchange core.

[0004] The characteristics of plate-fin heat exchanger are high heat transfer efficiency, compactness, lightness and strong adaptability. It has a large secondary heat transfer fin surface, so the heat transfer process is not only on the primary heat transfer baffle surface, but also on the heat medium side. In addition to the primary heat transfer baffle surface, the heat is also transferred along the height direction of the fin surface.

[0005] The only drawback is that most of the plate-fin heat exchanger is the secondary heat transfer fin surface, the primary heat transfer baffle surface is very small, and the fin height is several times or even dozens of times the fin thickness, which will directly lead to an exponential increase in the thermal resistance in the fin height direction, thereby reducing the heat transfer efficiency of the plate-fin heat exchanger. Summary of the invention

[0006] The purpose of the utility model is to solve the shortcomings of the above-mentioned existing plate-fin heat exchangers and provide a guide hole corrugated heat exchanger. The guide hole corrugated heat exchanger is mainly composed of a corrugated partition, corrugated fins or flat fins, guide holes, balancing holes, corrugated side seals, etc. to form a heat exchange core of the guide hole corrugated heat exchanger.

[0007] At least one layer of corrugated fins or flat fins with a certain corrugated shape is arranged between two adjacent corrugated partitions with a certain corrugated shape. The combination of the two adjacent corrugated partitions and the corrugated fins or flat fins forms a heat exchange corrugated plate bundle with a certain corrugated shape. The corrugated fins or flat fins are tightly attached to or welded to the corrugated partitions on both sides, and a number of heat exchange medium channels are formed on both sides of the corrugated fins or flat fins. Different cold and hot media are separated by corrugated partitions. The heat exchange medium channels on both sides of the corrugated fins or flat fins belong to the same medium, while the heat exchange medium channels on both sides of the corrugated partitions belong to different media.

[0008] For the guide hole corrugated heat exchanger, when the corrugated baffles are combined with the flat fins, the medium channels on both sides of the flat fins are divided into parallel dislocation, parallel cross dislocation and double cross dislocation. Parallel dislocation means that the crests of the corrugated baffles on both sides of the flat fins are aligned with the crests, the troughs are aligned with the troughs, the center points of contact between the corrugated baffles on both sides of the flat fins and the flat fins are mutually dislocated, and the straight lines of the flat fins are parallel to the parallel lines of the channel directions on both sides.

[0009] Parallel cross misalignment means that the parallel line in the channel direction of one side of the flat fin is parallel to the straight line of the flat fin, and is misaligned with the parallel line in the channel direction of the other side of the flat fin. The misalignment is measured by the intersection angle a between the straight line of the flat fin and the parallel line in the channel direction of the other side of the flat fin being greater than 0° and less than 70°, and the two ends of several channels on both sides of the flat fin are aligned, that is, the crest of the corrugated partition on one side of the flat fin is aligned with the trough of the corrugated partition on the other side, and the medium channels on both sides of the flat fin are crossed in front and behind the middle of the flat fin.

[0010] The difference between double cross dislocation and parallel cross dislocation is that the straight edge lines of the flat fins are not parallel to the parallel lines in the channel directions on both sides, and the parallel lines in the channel directions on both sides of the flat fins are cross-dislocated in opposite directions. The other technical features are basically the same as those described in parallel cross dislocation.

[0011] When the corrugated partitions are combined with the corrugated fins, the medium channels on both sides of the corrugated fins are divided into parallel misalignment, parallel crossing and parallel embedded misalignment, wherein the parallel misalignment means that the crests of the corrugated partitions on both sides of the corrugated fins are aligned with the crests, the troughs are aligned with the troughs, the center points of contact between the corrugated partitions on both sides of the corrugated fins and the corrugated fins are offset from each other, and the parallel lines of the channel direction on the corrugated fins are parallel to the parallel lines of the channel direction on the corrugated partitions on both sides.

[0012] Parallel crossing means that the parallel lines in the channel direction on the two corrugated partitions on both sides of the corrugated fin are parallel or crossed to each other, and the parallel lines in the channel direction on the corrugated fin intersect with the parallel lines in the channel direction on the corrugated partitions on both sides and extend to form a minimum angle between greater than 0° and equal to 90°.

[0013] Parallel embedding misalignment refers to the parallel lines of the two adjacent corrugated partitions and the corrugated fin channel directions being misaligned parallel to each other, and the trough of the corrugated partition on one side of the corrugated fin is embedded in the connecting line of the two crests of the corrugated fin, and the crest of the corrugated partition on the other side of the corrugated fin is embedded in the connecting line of the two troughs of the corrugated fin. With each misalignment, the waist of the corrugated fin and the waist of the corrugated partitions on both sides are close to each other.

[0014] The guide hole corrugated heat exchanger is provided with a plurality of heat exchange medium guide holes on the corrugated fins or flat fins with a certain corrugated shape. The same heat exchange medium shuttles back and forth between the two surfaces of the corrugated fins or flat fins through the plurality of guide holes. The position, shape, size and number of the guide holes on the corrugated fins or flat fins are set according to the actual heat exchange working conditions. The modes can be set in series, series-parallel and parallel, and the mutual conversion of the modes can be realized. The counterflow, crossflow, multi-stream flow and multi-pass flow modes can be realized through the combination setting of the medium channels, forming a complex and changeable heat exchange medium channel to adapt to different heat exchange working conditions.

[0015] The structures of the guide hole corrugated heat exchanger and the plate-fin heat exchanger are roughly the same, but the functions of the fins and partitions are completely opposite. The biggest difference is that the secondary heat exchange fin surface area of ​​the plate-fin heat exchanger is transformed into the primary heat exchange surface area of ​​the guide hole corrugated heat exchanger, and the primary heat exchange surface area of ​​the plate-fin heat exchanger is transformed into the secondary heat exchange surface area of ​​the guide hole corrugated heat exchanger. The secondary surface area of ​​the plate-fin heat exchanger is much larger than the primary heat exchange surface area, which improves the heat exchange efficiency of the guide hole corrugated heat exchanger to a new level on the basis of the existing plate-fin heat exchanger heat exchange efficiency, and demonstrates that the guide hole corrugated heat exchanger has outstanding substantial characteristics and significant progress, and the positive effect produced is obvious. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the parallel staggered channel mode and flow chart of the guide hole corrugated heat exchanger in the embodiment of the utility model.

[0017] Figure 2 It is a schematic diagram of the parallel cross-staggered channel mode and flow chart of the guide hole corrugated heat exchanger in the embodiment of the utility model.

[0018] Figure 3 It is a schematic diagram of a double cross-staggered channel mode and a flow chart of a guide hole corrugated heat exchanger according to an embodiment of the utility model.

[0019] Figure 4 It is a schematic diagram of the combined cross-section and flow of a trapezoidal corrugated partition and a flat fin of a guide hole corrugated heat exchanger according to an embodiment of the utility model.

[0020] Figure 5 It is a schematic diagram of the combined cross-section and flow of the arc-shaped corrugated partition and the flat fin of the guide hole corrugated heat exchanger of the embodiment of the utility model.

[0021] Figure 6 It is a schematic diagram of the combined cross-section and flow of a trapezoidal corrugated partition and a trapezoidal corrugated fin of a guide hole corrugated heat exchanger according to an embodiment of the utility model.

[0022] Figure 7The utility model is a schematic diagram of a cross section and a process flow diagram of a toothed corrugated partition plate and a toothed corrugated fin of a guide hole corrugated heat exchanger in which parallel staggered combinations are embedded.

[0023] Figure 8 It is a schematic diagram of a parallel cross-combination channel mode and a flow chart of a trapezoidal corrugated partition plate and a trapezoidal corrugated fin of a guide hole corrugated heat exchanger according to an embodiment of the utility model.

[0024] In the figure: 1 corrugated partition; 2 corrugated fin; 3 flat fin; 4 guide hole; 5 balancing hole; 6 side seal; 7 side seal plate; 8 corrugated side seal; 9 corrugated plate bundle hot medium inlet; 10 corrugated plate bundle hot medium outlet; 11 corrugated plate bundle cold medium inlet; 12 corrugated plate bundle cold medium outlet; 13 series section; 14 series-parallel section; 15 series-parallel channel enlargement section; 16 series-parallel channel reduction section; 17 wave pitch; 18 hot medium channel; 19 cold medium channel; 20 single-side blind area; 21 limit groove; 22 corrugated guide strip; a angle. DETAILED DESCRIPTION

[0025] In order to make the technical solution of the utility model clearer, the following will be combined with the drawings of the embodiments of the utility model, the technical solution and the features are fully described. Since the corrugated shapes of the guide hole corrugated heat exchanger of the utility model are relatively many, only the most representative corrugated shapes are described in the drawings of each embodiment. In order to clearly and intuitively understand the technical features of the utility model, Figures 1 to 8 Each schematic diagram only shows a partial heat exchange area of ​​the guide hole corrugated heat exchanger. The appearance, collector and diverter, guide plate, etc. of the guide hole corrugated heat exchanger belong to the prior art and will not be described in detail here.

[0026] Embodiments of the utility model Figure 1 This is a parallel staggered channel mode and flow diagram of the guide hole corrugated heat exchanger, such as Figure 1 As shown, a flat fin 3 is arranged between two corrugated partitions 1, and the flat fin 3 is welded to the corrugated partitions 1 on both sides at the contacting parts to form a corrugated plate bundle, and a plurality of heat exchange medium channels are formed at the places where the two corrugated partitions 1 are not in contact with the flat fin 3, and the heat exchange medium channels on both sides of the flat fin 3 are parallel and offset to each other, and the two ends of the plurality of heat exchange medium channels on both sides of the flat fin 3 are blocked by corrugated side sealing strips 8, and the guide vane can be arranged on the corrugated side sealing strips 8.

[0027] like Figure 1 As shown, the figure brings together the series section 13, the series-parallel section 14, the series-parallel channel enlargement section 15, the series-parallel channel reduction section 16, and the mutual conversion process of the series and series-parallel channels. In actual applications, various channel modes can be selected according to working conditions.

[0028] The flat fin 3 is provided with a guide hole 4, such as Figure 1As shown, the heat medium enters the heat medium channel 18 through the heat medium inlet 9, and then passes through the flat fin 3 through the guide hole 4 to enter the heat medium channel 18 on the other side of the flat fin 3. The heat medium flows through the heat medium channel 18 on the other side of the flat fin 3, and then returns to another heat medium channel 18 on the starting surface through other guide holes 4. The heat medium shuttles back and forth between the two surfaces of the flat fin 3 through the guide holes, and finally flows out from the heat medium outlet of the corrugated plate bundle, and the heat exchange process is realized.

[0029] like Figure 1 As shown in the figure, there is only a single hot medium channel 18. A layer of flat fins 3 and corrugated partitions 1 are added to any side of such a corrugated plate bundle to form a number of cold medium channels 19, and they are stacked in this way until the working condition design requirements are met. Finally, a number of identical cold and hot media are diverted and collected, and the cold and hot medium inlets and outlets of the guide hole corrugated heat exchanger are set. The cold and hot medium inlets and outlets of the guide hole corrugated heat exchanger can be set at any position on the side seal 6 of the guide hole corrugated heat exchanger or the side seal 8 of the corrugated heat exchanger. The cold and hot medium inlets and outlets are set at any position before and after the middle of the guide hole corrugated heat exchanger on the side seal 8 of the corrugated heat exchanger, and a multi-pass flow channel mode can be realized.

[0030] like Figure 1 As shown, several such heat exchange corrugated plate bundles can be fixed in parallel with certain gaps between the corrugated plate bundles to form a cold medium channel, which is then placed in the cylinder to divert and collect the cold and hot media, and to set the cold and hot medium inlets and outlets to form a plate-shell type guide hole corrugated heat exchanger. When the width of the corrugated plate bundle in the center of the cylinder is greater than the width of the corrugated plate on the side of the cylinder, the series and series-parallel modes can be used to adjust the average length of the channel. The plate-shell type corrugated heat exchanger can be used in various gas evaporation, condensation and other working environments.

[0031] Embodiments of the utility model Figure 2 It is a parallel cross-staggered channel mode and flow diagram of a guide hole corrugated heat exchanger. When the wave pitch 17 is too small to set the guide hole 4, parallel cross-staggered can be used.

[0032] When the heat exchange condition needs to be switched between series and series-parallel modes, there is a single-sided blind area 20 in the middle of the corrugated plate bundle, and the adjacent heat medium channels will inevitably switch between the series and series-parallel modes. The cold medium gradually increases the channel cross-sectional area, and the hot medium gradually reduces the channel cross-sectional area, which will better adapt to processes such as evaporation and condensation.

[0033] like Figure 2 When series connection or series-parallel connection is adopted as shown, the channels are independent of each other. In order to prevent the pressure in a certain channel from being too high or the flow rate from being uneven, a balancing hole 5 is provided on the flat fin 3 at the intersection of each channel to balance the pressure and flow rate of each channel in the series connection or series-parallel connection mode.

[0034] Embodiments of the utility model Figure 2 In addition to the above technical features, Figure 2 and Figure 1 The other technical features are basically the same and will not be described repeatedly here.

[0035] Embodiments of the utility model Figure 3 This is a double cross-staggered channel mode and flow diagram of the guide hole corrugated heat exchanger. Figure 3 The double cross-staggered channel mode is shown. Figure 1 Figure 2 The difference is that it is more stable and has a two-way channel slope. The size of the slope is related to the number of series and parallel channels. The channel slope is more suitable for viscous or phase-changing heat exchange media. Other technical features are similar to Figure 1 Figure 2 Basically the same, I won't repeat it here.

[0036] Embodiments of the utility model Figure 4 Figure 5 Figure 6 It is a cross-sectional and flow diagram of different shapes of corrugated baffles 1 and flat fins 3 or trapezoidal corrugated fins 2, which are combined in a parallel staggered channel mode. Each diagram forms multiple cold and hot medium heat exchange layers. Rectangular corrugations, parallelogram corrugations, right-angled trapezoidal corrugations, etc. can be used. Figure 4 Figure 5 Figure 6 In practical applications, suitable corrugated shapes can be selected according to the working conditions such as medium pressure and pressure reduction range. In order to improve the heat exchange efficiency as much as possible, such as Figure 6 As shown, when the corrugated partition plate 1 and the corrugated fin 2 are combined in parallel and staggered manner, the corrugated waist of the corrugated fin 2 should be as short as possible to meet the position of the guide hole.

[0037] Embodiments of the utility model Figure 7 The cross section and flow diagram of the toothed corrugated partition 1 and the toothed corrugated fin 2 of the guide hole corrugated heat exchanger are parallelly embedded in the staggered combination, as shown in FIG. Figure 7 As shown, two toothed corrugated partitions 1 and toothed corrugated fins 2 are offset parallel to each other, and then the trough of the toothed corrugated partition 1 on one side of the toothed corrugated fin 2 is embedded into the connection line of the two wave crests of the toothed corrugated fin 2, and the wave crest of the toothed corrugated partition 1 on the other side of the toothed corrugated fin 2 is embedded into the connection line of the two wave troughs of the toothed corrugated fin 2. The toothed corrugated partitions 1 on both sides of the toothed corrugated fin 2 are offset left and right in turn, and the superposition meets the working condition design requirements. Limiting grooves 21 are provided on the toothed corrugated fin 2 and the toothed corrugated partition 1 to facilitate the control of the embedding depth, and the medium channel width can be controlled in a fine state to meet the heat exchange needs of different cold and hot media.

[0038] Embodiments of the utility model Figure 8It is a cross-sectional diagram and flow diagram of the parallel cross-combination of trapezoidal corrugated baffles and trapezoidal corrugated fins of the guide hole corrugated heat exchanger, such as Figure 8 As shown, a layer of corrugated fins 2 with a certain corrugation shape is arranged between two adjacent corrugated partitions 1 with a certain corrugation shape, and the parallel lines of the channel directions on the two corrugated partitions 1 on both sides of the corrugated fins 2 are parallel or cross each other, and the parallel lines of the channel directions on the corrugated fins 2 intersect with the parallel lines of the channel directions of the corrugated partitions 1 on both sides and extend to form a minimum angle between greater than 0° and equal to 90°, forming heat exchange medium channels on both sides of the corrugated fins 2 and the two corrugated partitions 1, and corrugated guide strips 22 are arranged on both sides of the corrugated fins 2 according to the needs of the heat exchange working conditions, and the distance between the corrugated guide strips 22 is gradually increased. The fin 2 can be enlarged or reduced to adapt to the phase change process of the heat exchange medium. If necessary, a balancing hole 5 can be set on the corrugated fin 2 to balance the medium pressure on both sides of the corrugated fin. The cold medium enters the heat exchange medium channel of the corrugated partition 1 on both sides of the corrugated fin 2 from the inlet 11 of the corrugated plate bundle. Due to the action of the corrugated guide strip 22, the heat exchange cold medium reaches the end of the corrugated guide strip 22, and then the cold medium enters the heat exchange medium channel on the corrugated fin 2. After passing through the heat exchange medium channel on the corrugated fin 2, the cold medium enters the heat exchange medium channel on another corrugated partition 1, and circulates to the outlet 12 of the corrugated plate bundle to realize the heat exchange process.

[0039] The utility model can be applied to the industries of petroleum, chemical industry, natural gas processing, gas separation, etc., selects the best combination mode and satisfies the heat exchange of gas / gas, gas / liquid, liquid / liquid or cold and hot media with phase change, and can also meet the needs of heat exchange of multiple cold and hot media at the same time.

Claims

1. The guide hole corrugated heat exchanger is characterized by: A flat fin is arranged between two adjacent corrugated partitions with a certain corrugated shape to form a heat exchange corrugated plate bundle with a certain corrugated shape, a number of heat exchange medium channels of the same medium are formed on both sides of the flat fin, a number of heat exchange medium channels of different media are formed on both sides of the corrugated partition, a number of heat exchange medium guide holes are arranged on the flat fin, and the same medium shuttles back and forth between the two surfaces of the flat fin through the several guide holes.

2. The guide hole corrugated heat exchanger according to claim 1, characterized in that: The flat plate fins are provided with balancing holes.

3. The guide hole corrugated heat exchanger according to claim 1, characterized in that: The crests of the corrugated partitions on both sides of the flat fin are aligned with each other, the troughs are aligned with each other, the center points of contact between the flat fin and the corrugated partitions on both sides are offset from each other, and the side lines of the flat fin are parallel to the parallel lines of the channel directions on both sides.

4. The guide hole corrugated heat exchanger according to claim 1, characterized in that: The parallel line in the channel direction of one side of the flat fin is parallel to the edge line of the flat fin, and crosses and displaces with the parallel line in the channel direction of the other side of the flat fin. The amount of dislocation is such that the angle a of the intersection of the edge line of the flat fin and the parallel line in the channel direction of the other side of the flat fin is between greater than 0° and less than 70°. The crest of the corrugated partition on one side of the flat fin is aligned with the trough of the corrugated partition on the other side. The medium channels on both sides of the flat fin are cross-shaped in front and behind the middle of the flat fin.

5. The guide hole corrugated heat exchanger according to claim 1, characterized in that: The side line of the flat plate fin is not parallel to the parallel lines in the directions of the channels on both sides, and the parallel lines in the directions of the channels on both sides of the flat plate fin are cross-displaced in opposite directions. The amount of misalignment is an angle a between the side line of the flat plate fin and the parallel lines in the directions of the channels on both sides of the flat plate fin, which is greater than 0° and less than 70°. The crest of the corrugated partition on one side of the flat plate fin is aligned with the trough of the corrugated partition on the other side, and the medium channels on both sides of the flat plate fin are cross-shaped in front and behind the middle of the flat plate fin.

6. The guide hole corrugated heat exchanger is characterized by: At least one layer of corrugated fins with a certain corrugated shape is arranged between two adjacent corrugated partitions with a certain corrugated shape to form a heat exchange corrugated plate bundle with a certain corrugated shape. There are a number of heat exchange medium channels of the same medium on both sides of at least one layer of corrugated fins, and there are a number of heat exchange medium channels of different media on both sides of the corrugated partitions. A number of heat exchange medium guide holes are arranged on the corrugated fins, and the same heat exchange medium shuttles back and forth between the two surfaces of at least one layer of corrugated fins through the several guide holes.

7. The guide hole corrugated heat exchanger according to claim 6, characterized in that: The trough of the corrugated partition on one side of the corrugated fin is embedded in the connection line of the two wave crests of the corrugated fin, and the wave crest of the corrugated partition on the other side of the corrugated fin is embedded in the connection line of the two wave troughs of the corrugated fin, and they are staggered left and right in sequence, and the wave waist of the corrugated fin and the wave waist of the corrugated partitions on both sides are close to each other.

8. The guide hole corrugated heat exchanger according to claim 6, characterized in that: The crests of the corrugated partitions on both sides of the corrugated fins are aligned with each other, and the troughs are aligned with each other. The parallel lines in the channel direction on the corrugated fins and the parallel lines in the channel direction on the corrugated partitions on both sides are parallel to each other.

9. The guide hole corrugated heat exchanger is characterized by: A layer of corrugated fins with a certain corrugation shape is arranged between two adjacent corrugated partitions with a certain corrugation shape to form a heat exchange corrugated plate bundle with a certain corrugation shape. There are a number of heat exchange medium channels of the same medium on both sides of the corrugated fins, and heat exchange medium channels of different media on both sides of the corrugated partitions. Parallel lines in the channel directions of the two corrugated partitions on both sides of the corrugated fins are parallel or cross each other, and the parallel lines in the channel direction on the corrugated fins intersect with the parallel lines in the channel direction on the corrugated partitions on both sides and extend to form a minimum angle between greater than 0° and equal to 90°.

10. The guide hole corrugated heat exchanger according to claim 9, characterized in that: A corrugated guide strip is arranged between the corrugated fin and the corrugated partition.

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