Double-rotational-flow surrounding heat exchange device and heat exchange method

Abstract

The invention belongs to the field of heat exchange, and discloses a double-rotational-flow surrounding heat exchange device and a heat exchange method.The double-rotational-flow surrounding heat exchange device comprises a core body and first to sixth heat exchange units, during heat exchange, hot fluid enters from the core body and sequentially flows through the first heat exchange unit, the second heat exchange unit, the third heat exchange unit, the fourth heat exchange unit, the fifth heat exchange unit and the sixth heat exchange unit; the hot fluid is finally discharged from the hot fluid outlet of the pressing plate; cold fluid enters from the cold fluid inlet of the pressing plate, sequentially passes through the sixth heat exchange unit, the fifth heat exchange unit, the fourth heat exchange unit, the third heat exchange unit, the second heat exchange unit and the first heat exchange unit and is finally discharged from the cold fluid outlet in the core body. The multiple heat exchange units are connected and fixed in series, the number of cold fluid channels can be increased at any time to prolong the retention time of cold fluid after thermal expansion, and efficient and continuous cyclic utilization of heat can be achieved; the heat exchanger is suitable for industries such as chemical engineering, heating and ventilation, energy, petroleum and food and is used for realizing heat exchange.

Description

Technical Field

[0001] The present invention belongs to the field of heat exchange, and particularly relates to a double swirl flow surrounding heat exchange device and a heat exchange method. Background Art

[0002] Heat exchange refers to the process of transferring heat from a high-temperature fluid to a low-temperature fluid through a heat transfer medium.

[0003] The existing plate heat exchanger is composed of multiple sets of corrugated metal plates stacked together. Alternating cold and hot fluid channels are formed between the plates. The cold and hot fluids flow in the flow channels on both sides of adjacent plates respectively, adopting a co-current or counter-current manner, and disturbing the fluids through the corrugated structure of the plates to enhance heat transfer. For the flow states of the cold and hot fluids in the existing plate heat exchanger, see Figure 1 , Figure 1 In the figure, the red arrow represents the flow direction of the hot fluid, and the cyan arrow represents the flow direction of the cold fluid. The hot fluid enters through the first main input pipeline 2 and is distributed from the first main input pipeline 2 to the hot fluid channels on each plate 1. The cold fluid enters through the second main input pipeline 3 and is then distributed from the second main input pipeline 3 to the cold fluid channels on each plate 1. The hot fluid and the cold fluid flow in a counter-current manner between adjacent plates 1, and conduction heat exchange is carried out through the surface of the plate 1. The hot fluid that has completed heat exchange is directly discharged through the first main output pipeline 4, and the cold fluid is synchronously discharged through the second main output pipeline 5. However, the fluid channels in this type of plate heat exchanger are short and are not suitable for the efficient continuous recycling of heat with a large temperature difference.

[0004] The heat exchange efficiency of the existing spiral plate heat exchanger is similar to that of the plate heat exchanger, and the fluid channels are long, but the number of flow channels is limited, resulting in a limited fluid capacity in the flow channels.

[0005] The patent application of the invention with the publication number CN109098881A discloses a plate heat exchange engine, which includes a wound plate heat exchanger. The fluid channels are long and the number of flow channels can be increased. However, after heat exchange, the temperature of the cold fluid rises, and thermal expansion occurs in the cold fluid channel. When thermal expansion occurs, the volume of the cold fluid will expand and even turn into a gas, and the flow rate of the cold fluid in the cold fluid channel gradually increases. However, the cold fluid channel in the above-mentioned wound plate heat exchanger is a single channel. After the flow rate of the cold fluid increases, the residence time of the cold fluid in the cold fluid channel is shortened. In this case, the effective heat exchange time of the cold fluid and the hot fluid is shortened, and at this time, it is necessary to temporarily increase the number of cold fluid channels to increase the residence time of the cold fluid. However, the above-mentioned wound plate heat exchanger is formed by pressing a whole plate, and it is impossible to increase the number of cold fluid channels in the formed wound plate heat exchanger midway. Summary of the Invention

[0006] The present invention aims to provide a double swirl surrounding heat exchange device and a heat exchange method to solve the problem that the existing spiral plate heat exchanger cannot additionally increase the number of cold fluid channels to increase the residence time of the cold fluid after thermal expansion.

[0007] To achieve the above object, the technical solutions adopted by the present invention are as follows: The present invention provides a double swirl surrounding heat exchange device, including a core body, a heat exchange unit one, a heat exchange unit two and pressing plates. A hot fluid inlet and a cold fluid outlet are arranged on the core body, and the heat exchange unit one and the heat exchange unit two are symmetrically arranged with respect to the core body; The heat exchange unit one and the heat exchange unit two have the same structure, and both include a partition plate, a hot fluid plate, a heat conducting plate, and a cold fluid plate that are sequentially and tightly connected outward from the core body; a hot fluid channel is arranged on the hot fluid plate, and a cold fluid channel is arranged on the cold fluid plate. The partition plate and the heat conducting plate form double-sided extrusion and limitation on the hot fluid plate, so that the hot fluid channel forms a closed flow channel; One pressing plate is arranged on each of the heat exchange unit one and the heat exchange unit two on the side away from the core body. The heat conducting plate and the pressing plate form double-sided extrusion and limitation on the cold fluid plate, so that the cold fluid channel forms a closed flow channel; A plurality of flow holes for the hot fluid or the cold fluid to pass through are respectively arranged on the core body, the partition plate, the hot fluid plate, the cold fluid plate, the heat conducting plate and the pressing plate. The hot fluid channel, the cold fluid channel and the plurality of flow holes together constitute a composite flow channel that allows the hot fluid or the cold fluid to perform swirl surrounding separately, ensuring that the hot fluid and the cold fluid remain in an isolated state during the swirl movement; A cold fluid inlet and a hot fluid outlet are arranged on the pressing plate on one side of the core body.

[0008] As a limitation to the present invention: both the hot fluid channel and the cold fluid channel are continuous bending structures, and the flow trajectories of the hot fluid along the hot fluid channel and the cold fluid along the cold fluid channel are both in an inverted S shape.

[0009] As a further limitation to the present invention: at least two blocking strips are fixedly arranged on the hot fluid plate. Adjacent two blocking strips are arranged at intervals in the horizontal direction, and the upper end of one of the blocking strips is fixedly connected to the top edge of the hot fluid plate, and the lower end is a free end that extends into the hot fluid channel; the lower end of the other blocking strip is fixed to the bottom edge of the hot fluid plate, and the upper end is a free end that extends into the hot fluid channel; the free ends of the two blocking strips are arranged staggeredly in the height direction, so that the hot fluid channel forms an inverted S-shaped diversion path.

[0010] As a further limitation to the present invention: at least two blocking strips are fixedly arranged on the cold fluid plate. Adjacent two blocking strips are arranged at intervals in the horizontal direction, and the upper end of one of the blocking strips is fixedly connected to the top edge of the cold fluid plate, and the lower end is a free end that extends into the cold fluid channel; the lower end of the other blocking strip is fixed to the bottom edge of the cold fluid plate, and the upper end is a free end that extends into the cold fluid channel; the free ends of the two blocking strips are arranged staggeredly in the height direction, so that the cold fluid channel forms an inverted S-shaped diversion path.

[0011] As a further limitation of the present invention: the flow channel boundaries of the hot fluid channel and the cold fluid channel are set as wavy structures.

[0012] As another limitation of the present invention: it further includes heat exchange units three, four, five, and six with the same structure. Heat exchange unit three and heat exchange unit four are symmetrical about the core body. Heat exchange unit five and heat exchange unit six are symmetrical about the core body. Heat exchange unit one, heat exchange unit three, and heat exchange unit five are sequentially fastened and connected. Heat exchange unit two, heat exchange unit four, and heat exchange unit six are sequentially fastened and connected; the pressing plate is arranged on the side of heat exchange unit five and heat exchange unit six away from the core body; Heat exchange unit three includes a hot fluid plate, a heat conducting plate, a cold fluid plate, and a partition plate, and its structure is the same as that in heat exchange unit one; the heat conducting plates in heat exchange unit one and heat exchange unit three form double-sided extrusion and limitation on the hot fluid plate in heat exchange unit three. The heat conducting plates in heat exchange unit three and heat exchange unit five form double-sided extrusion and limitation on the hot fluid plate in heat exchange unit five. The heat conducting plates in heat exchange unit two and heat exchange unit four form double-sided extrusion and limitation on the hot fluid plate in heat exchange unit four. The heat conducting plates in heat exchange unit four and heat exchange unit six form double-sided extrusion and limitation on the hot fluid plate in heat exchange unit six; In heat exchange units one, two, three, four, five, and six, double-sided extrusion and limitation on the cold fluid plate are formed through the heat conducting plate and the partition plate; The cold fluid inlet and the hot fluid outlet are arranged on the pressing plate connected to heat exchange unit six; All the hot fluid channels, cold fluid channels, and flow holes in heat exchange units one to six together constitute a composite flow channel that allows the hot fluid or the cold fluid to perform swirling and surrounding separately.

[0013] The present invention also provides a heat exchange method, which adopts the above double-swirl surrounding heat exchange device. The method includes the following contents: The hot fluid enters the core body from the hot fluid inlet and flows out through the through holes in the core body, passes through the partition plate in heat exchange unit one and enters the hot fluid channel in heat exchange unit one, then turns back from the hot fluid channel in heat exchange unit one, passes through the partition plate and the core body in heat exchange unit one and enters heat exchange unit two, then passes through the partition plate in heat exchange unit two and enters the hot fluid channel in heat exchange unit two, and finally flows out from the hot fluid outlet on the pressing plate connected to heat exchange unit two; The cold fluid enters from the cold fluid inlet on the pressing plate connected to the second heat exchange unit, reaches the cold fluid channel, then passes through the heat conduction plate, hot fluid plate, and partition plate in the second heat exchange unit and enters the core. Subsequently, it passes through the partition plate, hot fluid plate, and heat conduction plate in the first heat exchange unit and enters the cold fluid channel, then turns back in the cold fluid channel of the first heat exchange unit, passes through the heat conduction plate, hot fluid plate, and partition plate in the first heat exchange unit and enters the core, and finally exits from the cold fluid outlet on the core. Both the hot fluid and the cold fluid flow in a swirling motion around the core, forming a double swirling flow.

[0014] As a limitation of the present invention: the method includes the following: The hot fluid enters the core from the hot fluid inlet and flows out through the flow holes in the core, passes through the partition plate in the first heat exchange unit and enters the hot fluid channel in the first heat exchange unit, then turns back in the hot fluid channel of the first heat exchange unit, passes through the partition plate and the core in the first heat exchange unit and enters the second heat exchange unit, then passes through the partition plate in the second heat exchange unit and enters the hot fluid channel in the second heat exchange unit, then turns back in the hot fluid channel of the second heat exchange unit, passes through the partition plate, the core, and the first heat exchange unit in the second heat exchange unit and enters the hot fluid channel in the third heat exchange unit, then turns back in the hot fluid channel of the third heat exchange unit, passes through the first heat exchange unit, the core, and the second heat exchange unit and enters the hot fluid channel in the fourth heat exchange unit, then turns back in the hot fluid channel of the fourth heat exchange unit, passes through the second heat exchange unit, the core, the first heat exchange unit, and the third heat exchange unit and enters the hot fluid channel in the fifth heat exchange unit, then turns back in the hot fluid channel of the fifth heat exchange unit, passes through the third heat exchange unit, the first heat exchange unit, the core, the second heat exchange unit, and the fourth heat exchange unit and enters the hot fluid channel in the sixth heat exchange unit, and finally passes through the heat conduction plate, cold fluid plate, and partition plate in the sixth heat exchange unit and finally exits from the hot fluid outlet on the pressing plate. The cold fluid enters from the cold fluid inlet on the pressing plate connected to the sixth heat exchange unit, passes through the partition plate in the sixth heat exchange unit and enters the cold fluid channel in the sixth heat exchange unit, then passes through the heat conduction plate and hot fluid plate in the sixth heat exchange unit and successively passes through the fourth heat exchange unit, the second heat exchange unit, the core, the first heat exchange unit, and the third heat exchange unit and enters the cold fluid channel in the fifth heat exchange unit; then turns back in the cold fluid channel of the fifth heat exchange unit and successively passes through the third heat exchange unit, the first heat exchange unit, the core, and the second heat exchange unit and enters the cold fluid channel in the fourth heat exchange unit, then turns back in the cold fluid channel of the fourth heat exchange unit and successively passes through the second heat exchange unit, the core, and the first heat exchange unit and enters the cold fluid channel in the third heat exchange unit; then turns back in the cold fluid channel of the third heat exchange unit and successively passes through the first heat exchange unit and the core and enters the cold fluid channel in the second heat exchange unit; then turns back in the cold fluid channel of the second heat exchange unit and passes through the core and enters the cold fluid channel in the first heat exchange unit, then passes through the heat conduction plate, hot fluid plate, and partition plate in the first heat exchange unit and enters the core, and finally exits from the cold fluid outlet on the core. Both the hot fluid and the cold fluid flow in a swirling motion around the core, forming a double swirling flow around the core.

[0015] Due to the adoption of the above technical solution, compared with the prior art, the beneficial effects achieved by the present invention are as follows: The present invention includes a core, and a first heat exchange unit and a second heat exchange unit symmetrically arranged with respect to the core. When the cold fluid and the hot fluid exchange heat in the present device, the hot fluid enters from the core, flows through the hot fluid channel in the first heat exchange unit, then turns back and passes through the core into the second heat exchange unit, and flows out from the hot fluid outlet on the pressing plate after flowing in the hot fluid channel in the second heat exchange unit; the hot fluid flows in a circular motion around the core in the present device, that is, a swirling motion; similarly, the cold fluid enters the cold fluid channel in the second heat exchange unit from the cold fluid inlet on the pressing plate, then passes through the core into the cold fluid channel in the first heat exchange unit, and after flowing in the cold fluid channel, turns back and enters the core, and finally discharges from the core. When the hot fluid flows in the hot fluid channel, it exchanges heat with the cold fluid flowing in the cold fluid channel across the heat conduction plate.

[0016] The present invention further includes a third heat exchange unit and a fourth heat exchange unit, a fifth heat exchange unit and a sixth heat exchange unit symmetrically arranged with respect to the core, which are used to increase the number of turns of the hot fluid and the cold fluid in the present device. During heat exchange, the hot fluid enters from the core and successively flows through the first heat exchange unit, the second heat exchange unit, the third heat exchange unit, the fourth heat exchange unit, the fifth heat exchange unit, and the sixth heat exchange unit, forming a circular motion, that is, a swirling motion, and finally discharges from the hot fluid outlet on the pressing plate; similarly, the cold fluid enters from the cold fluid inlet on the pressing plate and successively passes through the sixth heat exchange unit, the fifth heat exchange unit, the fourth heat exchange unit, the third heat exchange unit, the second heat exchange unit, and the first heat exchange unit, forming a circular motion, that is, a swirling motion, and finally discharges from the cold fluid outlet on the core. The added third to sixth heat exchange units enable the hot fluid and the cold fluid to form a swirling flow around the core by turning back multiple times in the present device; In the present invention, multiple heat exchange units are connected in series and fixed, and the number of heat exchange units can be increased or decreased at any time according to the situation during use to increase the number of cold fluid channels and the residence time of the cold fluid, and it has a wide range of applications. Moreover, the fluid channels of the present invention are long and the number of flow channels is large, and it can be applied to the efficient continuous recycling of heat with a large temperature difference.

[0017] To sum up, the present invention can increase the residence time of the cold fluid after thermal expansion by increasing the number of cold fluid channels at any time, and can realize the efficient continuous recycling of heat; the present invention is applicable to industries such as chemical engineering, heating ventilation, energy, petroleum, and food for heat exchange. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following further describes the present invention in detail with reference to the drawings and specific embodiments.

[0019] Figure 1Schematic diagram of the structure during heat exchange between cold and hot fluids in the prior art; Figure 2 Schematic diagram of the structure of Embodiment 1 of the present invention; Figure 3 Exploded view of Embodiment 1 of the present invention; Figure 4 Schematic diagram of the flow state of the hot fluid among the core body, Heat Exchange Unit 1, and Heat Exchange Unit 2 in Embodiment 1 of the present invention; Figure 5 Schematic diagram of the structure of the cold fluid plate in Embodiment 1 of the present invention (flow holes not shown); Figure 6 Schematic diagram of the structure of the hot fluid plate in Embodiment 1 of the present invention (flow holes not shown); Figure 7 Schematic diagram of the flow relationship between the hot fluid and the cold fluid among the heat exchange units in Embodiment 2 of the present invention; Figure 8 Exploded view of Embodiment 3 of the present invention; Figure 9 Schematic diagram of the application structure of Embodiment 3 of the present invention in a boiler.

[0020] In the figure: 1 - plate, 2 - first main input pipeline, 3 - second main input pipeline, 4 - first main output pipeline, 5 - second main output pipeline, 6 - Heat Exchange Unit 1, 7 - Heat Exchange Unit 2, 8 - Heat Exchange Unit 3, 9 - Heat Exchange Unit 4, 10 - Heat Exchange Unit 5, 11 - Heat Exchange Unit 6, 12 - front pressing plate, 13 - rear pressing plate, 14 - core body, 15 - first partition board, 16 - hot fluid plate, 17 - heat conducting plate, 18 - cold fluid plate, 19 - second partition board, 20 - hot fluid channel, 21 - cold fluid channel, 22 - left side bar, 23 - right side bar, 24 - middle bar, 25 - partition board, 26 - flow channel boundary, 27 - hot fluid inlet, 28 - hot fluid outlet, 29 - cold fluid inlet, 30 - cold fluid outlet, 31 - flow hole, 32 - stove, 33 - furnace, 34 - smoke hood. Detailed implementation manners

[0021] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the double - swirl circumferential heat exchange device and heat exchange method described herein are preferred embodiments, which are only used to illustrate and explain the present invention and do not constitute a limitation to the present invention.

[0022] The orientation terms or positional relationships such as "left", "right", "front", "rear", etc. described in the embodiments are based on the accompanying drawings in the specification of the present invention Figure 3The orientation relationship is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation on the content protected by the present invention.

[0023] Embodiment 1 Dual-swirl Surrounding Heat Exchange Device As Figure 2 、 3 shown, the whole of this embodiment is rectangular, and includes a core body 14, a first heat exchange unit 6, a second heat exchange unit 7, a third heat exchange unit 8, a fourth heat exchange unit 9, a fifth heat exchange unit 10, a sixth heat exchange unit 11 and a pressing plate. The first heat exchange unit 6 and the second heat exchange unit 7 have the same structure, and the third heat exchange unit 8, the fourth heat exchange unit 9, the fifth heat exchange unit 10 and the sixth heat exchange unit 11 have the same structure. Compared with the third heat exchange unit 8, the first heat exchange unit 6 is provided with an additional first partition 15.

[0024] The first heat exchange unit 6 and the second heat exchange unit 7 are symmetrically arranged with respect to the core body 14, the third heat exchange unit 8 and the fourth heat exchange unit 9 are symmetric with respect to the core body 14, and the fifth heat exchange unit 10 and the sixth heat exchange unit 11 are symmetric with respect to the core body 14. The first heat exchange unit 6, the third heat exchange unit 8 and the fifth heat exchange unit 10 are located on the front side of the core body 14 and are sequentially fastened and connected by bolts, and the second heat exchange unit 7, the fourth heat exchange unit 9 and the sixth heat exchange unit 11 are located on the rear side of the core body 14 and are sequentially fastened and connected. In this embodiment, only bolt holes are shown in the figure, and the bolts are not shown.

[0025] There are two pressing plates, and one is fixedly arranged on each of the sides of the fifth heat exchange unit 10 and the sixth heat exchange unit 11 away from the core body 14. In this embodiment, the pressing plates include a front pressing plate 12 and a rear pressing plate 13. The front pressing plate 12 is fixedly connected to the partition 25 in the fifth heat exchange unit 10, and the rear pressing plate 13 is fixedly connected to the partition 25 in the sixth heat exchange unit 11. The cold fluid inlet 29 and the hot fluid outlet 28 are arranged on the pressing plate (i.e., the rear pressing plate 13) connected to the sixth heat exchange unit 11.

[0026] I. Taking the first heat exchange unit 6 as an example to illustrate the specific structure: As Figure 3 、 4 shown, the first heat exchange unit 6 includes a first partition 15, a hot fluid plate 16, a heat conducting plate 17, a cold fluid plate 18 and a second partition 19 that are sequentially fastened and connected by bolts from the core body 14 outward (i.e., forward). Here, since there are two partitions in the first heat exchange unit 6, they are called the first partition 15 and the second partition 19, while there is only one partition 25 in the third heat exchange unit 8 to the sixth heat exchange unit 11, and they are uniformly called the partition 25. The structure of the hot fluid plate 16 is as Figure 6 shown, and a hot fluid channel 20 is provided on the hot fluid plate 16. As Figure 4As shown, the first partition plate 15 and the heat conducting plate 17 form a bilateral extrusion limit on the heat fluid plate 16, so that the heat fluid channel 20 forms a closed flow channel, that is, the heat fluid can only flow within the heat fluid channel 20 and will not flow between the heat fluid plate 16 and the heat conducting plate 17 or between the heat fluid plate 16 and the first partition plate 15. Correspondingly, as Figure 4 , 5 shown, a cold fluid channel 21 is provided on the cold fluid plate 18, and the heat conducting plate 17 and the second partition plate 19 form a bilateral extrusion limit on the cold fluid plate 18, so that the cold fluid channel 21 forms a closed flow channel, that is, the cold fluid can only flow within the cold fluid channel 21 and will not flow between the cold fluid plate 18 and the heat conducting plate 17 or between the cold fluid plate 18 and the second partition plate 19.

[0027] The heat fluid channel 20 and the cold fluid channel 21 in the first heat exchange unit 6:[[]] As Figure 5 , 6 shown, both the heat fluid channel 20 and the cold fluid channel 21 are continuous bending structures, and the flow trajectories of the heat fluid along the heat fluid channel 20 and the cold fluid along the cold fluid channel 21 are both in an inverted S shape. Specifically, at least two retaining bars are fixedly provided on the heat fluid plate 16. Adjacent two retaining bars are arranged at intervals in the horizontal direction, and the upper end of one retaining bar is fixedly connected to the top edge of the heat fluid plate 16, and the lower end is a free end extending into the heat fluid channel 20; the lower end of the other retaining bar is fixed to the bottom edge of the heat fluid plate 16, and the upper end is a free end extending into the heat fluid channel 20. The free ends of the two retaining bars are staggered in the height direction, so that the heat fluid channel 20 forms an inverted S-shaped diversion path. Specifically, in this embodiment, there are three retaining bars. The three retaining bars are arranged at intervals in the left-right direction. The upper ends of the left retaining bar 22 and the right retaining bar 23 are respectively fixedly connected to the top edge of the heat fluid plate 16, and the lower ends are respectively free ends extending into the heat fluid channel 20. The lower end of the middle retaining bar 24 is fixed to the bottom edge of the heat fluid plate 16, and the upper end is a free end extending into the heat fluid channel 20. The free ends of the left retaining bar 22 and the right retaining bar 23 are lower than the free end of the middle retaining bar 24. When the heat fluid flows in the heat fluid channel 20, the flow trajectory is in an inverted S shape.

[0028] As Figure 5As shown in the figure, at least two baffles are fixedly arranged on the cold fluid plate 18. Adjacent two baffles are arranged at intervals in the horizontal direction. The upper end of one baffle is fixedly connected to the top edge of the cold fluid plate 18, and the lower end is a free end extending into the cold fluid channel 21; the lower end of the other baffle is fixed to the bottom edge of the cold fluid plate 18, and the upper end is a free end extending into the cold fluid channel 21; the free ends of the two baffles are staggered in the height direction, so that the cold fluid channel 21 forms an inverted S-shaped flow path. Specifically, in this embodiment, there are three baffles. The three baffles are arranged at intervals in the left-right direction. The upper ends of the left baffle 22 and the right baffle 23 are respectively fixedly connected to the top edge of the cold fluid plate 18, and the lower ends are respectively free ends extending into the cold fluid channel 21. The lower end of the middle baffle 24 is fixed to the bottom edge of the cold fluid plate 18, and the upper end is a free end extending into the cold fluid channel 21. The free ends of the left baffle 22 and the right baffle 23 are lower than the free end of the middle baffle 24. When the cold fluid flows in the cold fluid channel 21, the flow trajectory is in an inverted S shape.

[0029] The three baffles can force the hot fluid to form an inverted S-shaped flow trajectory in the hot fluid channel 20 and the cold fluid to form an inverted S-shaped flow trajectory in the cold fluid channel 21, and can also increase the structural strength of the cold fluid plate 18 and the hot fluid plate 16. Compared with the straight flow channel, this structure increases the length of the flow path, extends the contact time between the hot fluid and the heat conduction plate 17, and ensures that the heat is fully conducted to the surface of the heat conduction plate 17. Of course, the number of baffles can also be set to other numbers, such as two or four.

[0030] Furthermore, the flow channel boundaries 26 of the hot fluid channel 20 and the cold fluid channel 21 are set as a wavy structure, which can expand the contact area and increase the heat exchange area.

[0031] The flow-through holes 31 in the heat exchange unit 6: The heat conduction plate 17 is made of a thin metal aluminum plate with a relatively large thermal conductivity. Of course, a thin stainless steel or copper plate can also be used. A plurality of flow-through holes 31 for the hot fluid or the cold fluid to pass through are respectively arranged on the hot fluid plate 16, the cold fluid plate 18, the first partition plate 15, the second partition plate 19, the partition plate 25, and the heat conduction plate 17. The hot fluid channel 20, the cold fluid channel 21, and the plurality of flow-through holes 31 together form a composite flow channel that allows the hot fluid or the cold fluid to perform a swirling circulation separately, ensuring that the hot fluid and the cold fluid are kept in a separated state during the swirling motion. For example, as Figure 4 shown, a plurality of flow-through holes 31 are respectively arranged at the upper left corner and the upper right corner of the first partition plate 15. Among the flow-through holes 31 at the upper right corner, one flow-through hole 31 corresponds to the hot fluid channel 20, but the remaining flow-through holes 31 do not correspond to the hot fluid channel 20. The principle is: taking the flow of the hot fluid as an example, as Figure 4 shown, Figure 4The red line represents the hot fluid path, and the arrow represents the flow direction. The hot fluid flows out through the flow-through holes 31 on the core 14, passes through the flow-through holes 31 on the first partition plate 15, enters the hot fluid channels 20 on the hot fluid plate 16, and meanders from right to left within the hot fluid channels 20. Since the flow-through holes 31 in the upper left corner of the heat conduction plate 17 do not correspond to the hot fluid channels 20, the hot fluid does not flow forward but turns back backward on the left side of the hot fluid channels 20, passes through the flow-through holes 31 on the first partition plate 15 to enter the core 14, and passes through the flow-through holes 31 on the core 14 to reach the second heat exchange unit 7. The hot fluid undergoes the same flow in the second heat exchange unit 7 and then turns back into the core 14. At this time, the hot fluid flows out from another flow-through hole 31 on the core 14 and enters the first heat exchange unit 6. When entering, the hot fluid does not enter the hot fluid channels 20 on the hot fluid plate 16 in the first heat exchange unit 6 but passes through the flow-through holes 31 of the first partition plate 15, the flow-through holes 31 of the hot fluid plate 16, the flow-through holes 31 of the heat conduction plate 17, the flow-through holes 31 of the cold fluid plate 18, and the flow-through holes 31 of the second partition plate 19 to enter the hot fluid channels 20 in the third heat exchange unit 8. Generally speaking, by arranging the flow-through holes 31 on different structures in a staggered manner, when the hot fluid needs to flow into the hot fluid channels 20, it passes through the flow-through holes 31 corresponding to the hot fluid channels 20. When the hot fluid does not need to enter the hot fluid channels 20 of a certain heat exchange unit but needs to cross the heat exchange unit during the circulation, the hot fluid passes through the flow-through holes 31 on the hot fluid plate 16 and does not enter the hot fluid channels 20 of the heat exchange unit to be crossed. The flow-through holes 31 drawn in the figure are only for illustration, and the positions and quantities of the flow-through holes 31 can be set according to the specific number of swirl circulations in actual applications. In the present invention, all the hot fluid channels 20, cold fluid channels 21, and flow-through holes 31 in the first heat exchange unit 6 to the sixth heat exchange unit 11 together constitute a composite flow channel that allows the hot fluid or the cold fluid to perform swirl circulation independently.

[0032] The structure of the second heat exchange unit 7 will not be described in detail.

[0033] The heat exchange unit three 8 includes a hot fluid plate 16, a heat conducting plate 17, a cold fluid plate 18 and a partition plate 25, and its structure is the same as that in the heat exchange unit one 6, so it will not be elaborated here. The heat conducting plate 17 in each heat exchange unit is located between the hot fluid plate 16 and the cold fluid plate 18. However, it should be noted that the heat conducting plates 17 in the heat exchange unit one 6 and the heat exchange unit three 8 form a double-sided extrusion limit on the hot fluid plate 16 in the heat exchange unit three 8, that is, the second partition plate 19 in the heat exchange unit one 6 and the heat conducting plate 17 in the heat exchange unit three 8 form a double-sided extrusion limit on the hot fluid plate 16 in the heat exchange unit three 8. The heat conducting plates 17 in the heat exchange unit three 8 and the heat exchange unit five 10 form a double-sided extrusion limit on the hot fluid plate 16 in the heat exchange unit five 10, that is, the partition plate 25 in the heat exchange unit three 8 and the heat conducting plate 17 in the heat exchange unit five 10 form a double-sided extrusion limit on the hot fluid plate 16 in the heat exchange unit five 10. The heat conducting plates 17 in the heat exchange unit two 7 and the heat exchange unit four 9 form a double-sided extrusion limit on the hot fluid plate 16 in the heat exchange unit four 9, that is, the second partition plate 19 in the heat exchange unit two 7 and the heat conducting plate 17 in the heat exchange unit four 9 form a double-sided extrusion limit on the hot fluid plate 16 in the heat exchange unit four 9. The heat conducting plates 17 in the heat exchange unit four 9 and the heat exchange unit six 11 form a double-sided extrusion limit on the hot fluid plate 16 in the heat exchange unit six 11, that is, the partition plate 25 in the heat exchange unit four 9 and the heat conducting plate 17 in the heat exchange unit six 11 form a double-sided extrusion limit on the hot fluid plate 16 in the heat exchange unit six 11.

[0034] In the heat exchange unit one 6, the heat exchange unit two 7, the heat exchange unit three 8, the heat exchange unit four 9, the heat exchange unit five 10, and the heat exchange unit six 11, the heat conducting plate 17 and the partition plate 25 (or the second partition plate 19) form a double-sided extrusion limit on the cold fluid plate 18.

[0035] II. Core body 14: As Figures 2 - 4 shown, a hot fluid inlet 27, a cold fluid outlet 30 and a plurality of flow holes 31 are provided on the core body 14.

[0036] Embodiment 2 Heat exchange method This embodiment adopts Embodiment 1 and specifically includes the following content: As Figure 7 shown, in combination with Figures 2 - 4, 8. The hot fluid enters the core body 14 from the hot fluid inlet 27 and flows out through the flow holes 31 of the core body 14, passes through the first partition 15 in the first heat exchange unit 6 and enters the right side of the hot fluid channel 20 in the first heat exchange unit 6, then turns back from the left side of the hot fluid channel 20 in the first heat exchange unit 6, passes through the flow holes 31 of the first partition 15 in the first heat exchange unit 6 and the flow holes 31 of the core body 14 and enters the second heat exchange unit 7, passes through the first partition 15 in the second heat exchange unit 7 and enters the left side of the hot fluid channel 20 in the second heat exchange unit 7, then turns back from the right side of the hot fluid channel 20 in the second heat exchange unit 7, passes through the flow holes 31 of the first partition 15 in the second heat exchange unit 7, the flow holes 31 of the core body 14, and the flow holes 31 on the right side in the first heat exchange unit 6 (the hot fluid will not enter the hot fluid channel 20 in the first heat exchange unit 6 at this time), enters the right side of the hot fluid channel 20 in the third heat exchange unit 8, then turns back from the left side of the hot fluid channel 20 in the third heat exchange unit 8, passes through the flow holes 31 in the first heat exchange unit 6 (due to the corresponding relationship of the flow holes 31, it will not enter the hot fluid channel 20 in the first heat exchange unit 6 again), the flow holes 31 of the core body 14, and the flow holes 31 in the second heat exchange unit 7 (it will not enter the hot fluid channel 20 in the second heat exchange unit 7 again) and enters the left side of the hot fluid channel 20 in the fourth heat exchange unit 9, then turns back from the right side of the hot fluid channel 20 in the fourth heat exchange unit 9, passes through the second heat exchange unit 7, the core body 14, the first heat exchange unit 6, and the third heat exchange unit 8 (it will not enter the hot fluid channels 20 in the second heat exchange unit 7, the first heat exchange unit 6, and the third heat exchange unit 8 again), enters the right side of the hot fluid channel 20 in the fifth heat exchange unit 10, then turns back from the left side of the hot fluid channel 20 in the fifth heat exchange unit 10, passes through the third heat exchange unit 8, the first heat exchange unit 6, the core body 14, the second heat exchange unit 7, and the fourth heat exchange unit 9 (it will not enter the hot fluid channels 20 in the third heat exchange unit 8, the first heat exchange unit 6, the second heat exchange unit 7, and the fourth heat exchange unit 9 again), enters the left side of the hot fluid channel 20 in the sixth heat exchange unit 11, after flowing to the right side of the hot fluid channel 20, finally passes through the heat conduction plate 17, the cold fluid plate 18, and the partition 25 in the sixth heat exchange unit 11, and finally discharges from the hot fluid outlet 28 on the rear pressure plate 13. The multiple flow holes 31 drawn in the figure do not all flow at the same time.

[0037] As Figure 7 shown, combined with Figure 3 , 8, after the cold fluid enters from the cold fluid inlet 29 on the pressure plate (i.e., the rear pressure plate 13) connected to the heat exchange unit six 11, it passes through the partition plate 25 in the heat exchange unit six 11 and enters the right side of the cold fluid channel 21 in the heat exchange unit six 11, then flows to the left side of the cold fluid channel 21. After passing through the flow holes 31 of the heat conduction plate 17 and the flow holes 31 of the hot fluid plate 16 in the heat exchange unit six 11, it sequentially passes through the heat exchange unit four 9, the heat exchange unit two 7, the core body 14, the heat exchange unit one 6, and the heat exchange unit three 8 and enters the left side of the cold fluid channel 21 in the heat exchange unit five 10. It should be noted that the cold fluid does not enter the hot fluid channels 20 and the cold fluid channels 21 in the heat exchange unit four 9, the heat exchange unit two 7, the heat exchange unit one 6, and the heat exchange unit three 8, but directly enters the cold fluid channel 21 in the heat exchange unit five 10 through the flow holes 31. Subsequently, it turns back from the right side of the cold fluid channel 21 in the heat exchange unit five 10 and sequentially passes through the heat exchange unit three 8, the heat exchange unit one 6, the core body 14, and the heat exchange unit two 7 and enters the right side of the cold fluid channel 21 in the heat exchange unit four 9 (the cold fluid does not enter the hot fluid channels 20 and the cold fluid channels 21 in the heat exchange unit three 8, the heat exchange unit one 6, and the heat exchange unit two 7), then turns back from the left side of the cold fluid channel 21 in the heat exchange unit four 9 and sequentially passes through the heat exchange unit two 7, the core body 14, and the heat exchange unit one 6 (the cold fluid does not enter the hot fluid channels 20 and the cold fluid channels 21 in the heat exchange unit two 7 and the heat exchange unit one 6), and enters the left side of the cold fluid channel 21 in the heat exchange unit three 8; then it turns back from the right side of the cold fluid channel 21 in the heat exchange unit three 8 and sequentially passes through the heat exchange unit one 6 and the core body 14 (the cold fluid does not enter the hot fluid channels 20 and the cold fluid channels 21 in the heat exchange unit one 6), and enters the right side of the cold fluid channel 21 in the heat exchange unit two 7; then it turns back from the left side of the cold fluid channel 21 in the heat exchange unit two 7 and passes through the core body 14 and enters the left side of the cold fluid channel 21 in the heat exchange unit one 6. After flowing to the right side of the cold fluid channel 21, it finally passes through the heat conduction plate 17, the hot fluid plate 16, and the first partition plate 15 in the heat exchange unit one 6 and enters the core body 14, and finally is discharged from the cold fluid outlet 30 on the core body 14.

[0038] Both the hot fluid and the cold fluid flow in a circular swirling motion centered around the core body 14 in this device.

[0039] Embodiment 3 Double - swirling circular heat exchange device Compared with Embodiment 1, this embodiment reduces the heat exchange unit three 8, the heat exchange unit four 9, the heat exchange unit five 10, and the heat exchange unit six 11. As Figure 8As shown in the figure, this embodiment includes a core body 14, a first heat exchange unit 6, a second heat exchange unit 7, and a pressing plate. The structures and positional relationships of the core body 14, the first heat exchange unit 6, and the second heat exchange unit 7 are the same as those in Embodiment 1. The structures of the first partition plate 15, the hot fluid plate 16, the heat conduction plate 17, and the cold fluid plate 18 in the first heat exchange unit 6, as well as its hot fluid channels 20, cold fluid channels 21, flow-through holes 31, etc. are also the same as those in Embodiment 1. The cold fluid inlet 29 and the hot fluid outlet 28 are also provided on the rear pressing plate 13. The difference is that in this embodiment, the front pressing plate 12 is fixedly connected to the second partition plate 19 in the first heat exchange unit 6, and the rear pressing plate 13 is fixedly connected to the second partition plate 19 in the second heat exchange unit 7. The heat conduction plate 17 and the pressing plate form a double-sided extrusion limit on the cold fluid plate 18. Taking the first heat exchange unit 6 as an example, the front pressing plate 12 is fixedly connected to the second partition plate 19 and limits the cold fluid plate 18 together with the heat conduction plate 17; the double-sided extrusion limit on the hot fluid plate 16 is the same as that in Embodiment 1.

[0040] Embodiment 4 Heat Exchange Method This embodiment adopts Embodiment 3 and is basically similar to Embodiment 2. The difference is that the flow path in this embodiment is shortened. This embodiment specifically includes the following content: As Figure 8 shown, Figure 8 In the figure, the red line represents the hot fluid flow path, and the cyan line represents the cold fluid flow path. The hot fluid enters the core body 14 from the hot fluid inlet 27 and flows out through the flow-through holes 31 of the core body 14, passes through the first partition plate 15 in the first heat exchange unit 6 and enters the right side of the hot fluid channel 20 in the first heat exchange unit 6, then turns back from the left side of the hot fluid channel 20 in the first heat exchange unit 6, passes through the flow-through holes 31 of the first partition plate 15 in the first heat exchange unit 6 and the flow-through holes 31 of the core body 14 and enters the second heat exchange unit 7, then passes through the first partition plate 15 in the second heat exchange unit 7 and enters the left side of the hot fluid channel 20 in the second heat exchange unit 7. After flowing to the right side of the hot fluid channel 20, it passes through the heat conduction plate 17, the cold fluid plate 18, and the second partition plate 19 in the second heat exchange unit 7, and finally is discharged from the hot fluid outlet 28 on the rear pressing plate 13 connected to the second heat exchange unit 7; After the cold fluid enters from the cold fluid inlet 29 on the pressing plate (i.e., the rear pressing plate 13) of the heat exchange unit II 7, it reaches the right side of the cold fluid channel 21 of the heat exchange unit II 7. After flowing to the left side of the cold fluid channel 21, it then passes through the flow-through holes 31 of the heat conduction plate 17, the flow-through holes 31 of the hot fluid plate 16, and the flow-through holes 31 of the first partition plate 15 in the heat exchange unit II 7 to enter the core body 14. Then, it flows out from the flow-through holes 31 of the core body 14 and passes through the flow-through holes 31 of the first partition plate 15, the flow-through holes 31 of the hot fluid plate 16, and the flow-through holes 31 of the heat conduction plate 17 in the heat exchange unit I 6 to enter the left side of the cold fluid channel 21 in the heat exchange unit I 6. Then, it turns back from the right side of the cold fluid channel 21 in the heat exchange unit I 6, passes through the flow-through holes 31 of the heat conduction plate 17, the flow-through holes 31 of the hot fluid plate 16, and the flow-through holes 31 of the first partition plate 15 in the heat exchange unit I 6 to enter the core body 14, and finally is discharged from the cold fluid outlet 30 on the core body 14; Both the hot fluid and the cold fluid flow in a swirling and surrounding manner centered on the core body 14, forming a double swirling and surrounding flow.

[0041] It should be particularly noted that in this embodiment, multiple heat exchange units are connected in series and fixed. The number of heat exchange units can be increased according to actual applications, and the series flow of the cold fluid and the hot fluid in each heat exchange unit can also be adjusted to a parallel flow. For example, the hot fluid from the heat exchange unit I can be output to the heat exchange unit II and the heat exchange unit IV simultaneously, and the cold fluid can also be adjusted to a parallel flow state to adapt to the situation where the flow rate of the cold fluid increases after thermal expansion and increase the residence time of the cold fluid after thermal expansion. At the same time, the fluid channels of the present invention are long, and the number of flow channels can be increased, which can be applied to the efficient continuous recycling of heat with a large temperature difference.

[0042] In addition, there are the following functions: First, it can achieve the efficient continuous recycling of heat; here, efficient means that the heat source for recycling has a recycling rate greater than 50% in each cycle process, that is, mainly based on heat recycling and supplemented by compensating for heat loss. Continuous means that the cycle interruption is not caused by external factors, such as equipment failure. Example: The hot gas in the boiler enters the external combustion engine, and then enters the present invention for heat exchange again. The steam after heat exchange enters the boiler again for heating, and then cycles again to achieve the efficient continuous recycling of heat.

[0043] Second, the present invention can replace the pot and flue in the boiler and be used for recovering the waste heat generated in the boiler. Such as Figure 9As shown in the figure, the high-temperature waste heat generated from the smoke hood 34 enters this device, and the high-temperature water after heat exchange in this device then enters the furnace 33. By replacing the boiler, the high-temperature gas discharged from the internal combustion engine can be used for the external combustion engine. Specifically, the high-temperature gas discharged from the internal combustion engine is heat-exchanged with cold water through the present invention, and the water after heat exchange is directly used in the external combustion engine. Then the external combustion engine will no longer consume the fuel in the stove 32, and the same effect as the prior art can be achieved. In addition, the boiler can also be embedded in the middle of the core body, which can further reduce heat loss.

[0044] Thirdly, compared with the spiral plate heat exchanger, the processing technology of this application is simple and the cost is low.

[0045] It should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the above embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A double cyclone surround heat exchange device, characterized in that: It includes a core, a heat exchange unit 1, a heat exchange unit 2 and a pressure plate. The core is provided with a hot fluid inlet and a cold fluid outlet. The heat exchange unit 1 and the heat exchange unit 2 are symmetrically arranged with respect to the core. The heat exchange unit 1 and the heat exchange unit 2 have the same structure, and both include a partition, a hot fluid plate, a heat conduction plate, and a cold fluid plate that are sequentially fastened and connected from the core to the outside; a hot fluid channel is provided on the hot fluid plate, and a cold fluid channel is provided on the cold fluid plate. The partition and the heat conduction plate form a double-sided extrusion limit for the hot fluid plate, so that the hot fluid channel forms a closed flow channel; a pressure plate is provided on each side of the heat exchange unit 1 and the heat exchange unit 2 away from the core, and the heat conduction plate and the pressure plate form a double-sided extrusion limit for the cold fluid plate, so that the cold fluid channel forms a closed flow channel; The core, the partition, the hot fluid plate, the cold fluid plate, the heat conducting plate and the pressure plate are respectively provided with a plurality of flow holes for the hot fluid or the cold fluid to pass through. The hot fluid channel, the cold fluid channel and the plurality of flow holes together constitute a composite flow channel that allows the hot fluid or the cold fluid to swirl around separately, ensuring that the hot fluid and the cold fluid remain isolated during the swirl motion; A cold fluid inlet and a hot fluid outlet are arranged on a pressure plate on one side of the core.

2. The double cyclone surround heat exchange device according to claim 1, characterized in that: The hot fluid channel and the cold fluid channel are both continuous bending structures, and the flow trajectory of the hot fluid along the hot fluid channel and the flow trajectory of the cold fluid along the cold fluid channel are both inverted S-shape.

3. The double cyclone surround heat exchange device according to claim 2, characterized in that: At least two baffles are fixed on the thermal fluid plate, and two adjacent baffles are arranged at intervals in the horizontal direction, and the upper end of one of the baffles is fixed to the top edge of the thermal fluid plate, and the lower end is a free end cantilevered into the thermal fluid channel; the lower end of the other baffle is fixed to the bottom edge of the thermal fluid plate, and the upper end is a free end cantilevered into the thermal fluid channel; the free ends of the two baffles are staggered in the height direction, so that the thermal fluid channel forms an inverted S-shaped guide path.

4. The double cyclone surround heat exchange device according to claim 3, characterized in that: At least two baffles are fixed on the cold fluid plate, and two adjacent baffles are arranged at intervals in the horizontal direction, and the upper end of one of the baffles is fixedly connected to the top edge of the cold fluid plate, and the lower end is a free end cantilevered into the cold fluid channel; the lower end of the other baffle is fixed to the bottom edge of the cold fluid plate, and the upper end is a free end cantilevered into the cold fluid channel; the free ends of the two baffles are staggered in the height direction, so that the cold fluid channel forms an inverted S-shaped guide path.

5. The double cyclone surround heat exchange device according to claim 4, characterized in that: The flow channel boundaries of the hot fluid channel and the cold fluid channel are set to a wavy structure.

6. The double cyclone surround heat exchange device according to any one of claims 1 to 5, characterized in that: It also includes heat exchange unit 3, heat exchange unit 4, heat exchange unit 5, and heat exchange unit 6 with the same structure. Heat exchange unit 3 and heat exchange unit 4 are symmetrical about the core body, heat exchange unit 5 and heat exchange unit 6 are symmetrical about the core body, heat exchange unit 1, heat exchange unit 3, and heat exchange unit 5 are fastened and connected in sequence, and heat exchange unit 2, heat exchange unit 4, and heat exchange unit 6 are fastened and connected in sequence; a pressure plate is arranged on a side of heat exchange unit 5 and heat exchange unit 6 away from the core body; The heat exchange unit three includes a hot fluid plate, a heat conduction plate, a cold fluid plate and a partition, and its structure is the same as that of the heat exchange unit one; the heat conduction plates in the heat exchange unit one and the heat exchange unit three form a double-sided extrusion limit for the hot fluid plate in the heat exchange unit three, the heat conduction plates in the heat exchange unit three and the heat exchange unit five form a double-sided extrusion limit for the hot fluid plate in the heat exchange unit five, the heat conduction plates in the heat exchange unit two and the heat exchange unit four form a double-sided extrusion limit for the hot fluid plate in the heat exchange unit four, and the heat conduction plates in the heat exchange unit four and the heat exchange unit six form a double-sided extrusion limit for the hot fluid plate in the heat exchange unit six; Heat exchange unit 1, heat exchange unit 2, heat exchange unit 3, heat exchange unit 4, heat exchange unit 5, and heat exchange unit 6 all form double-sided extrusion limits on the cold fluid plate through heat conduction plates and partitions; The cold fluid inlet and the hot fluid outlet are arranged on a pressure plate connected to the heat exchange unit 6; All the hot fluid channels, cold fluid channels and flow holes in the heat exchange units 1 to 6 together form a composite flow channel that allows the hot fluid or the cold fluid to swirl around separately.

7. A heat exchange method, using the double cyclone surround heat exchange device according to any one of claims 1 to 6, characterized in that: The Method Includes the following: The hot fluid enters the core from the hot fluid inlet and flows out from the flow hole of the core, passes through the baffle in the heat exchange unit 1 and enters the hot fluid channel in the heat exchange unit 1, then turns back from the hot fluid channel of the heat exchange unit 1, passes through the baffle and core in the heat exchange unit 1 and enters the heat exchange unit 2, then passes through the baffle in the heat exchange unit 2 and enters the hot fluid channel in the heat exchange unit 2, then passes through the heat conduction plate and cold fluid plate in the heat exchange unit 2, and finally is discharged from the hot fluid outlet on the pressure plate connected to the heat exchange unit 2; The cold fluid enters from the cold fluid inlet on the pressure plate connected to the heat exchange unit 2 and reaches the cold fluid channel, then passes through the heat transfer plate, hot fluid plate, and partition in the heat exchange unit 2 to enter the core, then passes through the partition, hot fluid plate, and heat transfer plate in the heat exchange unit 1 to enter the cold fluid channel, then turns back from the cold fluid channel in the heat exchange unit 1, passes through the heat transfer plate, hot fluid plate, and partition in the heat exchange unit 1 to enter the core, and finally is discharged from the cold fluid outlet on the core; Both the hot fluid and the cold fluid flow in a swirl around the core, forming a double swirl.

8. The heat exchange method according to claim 7, characterized in that: The method includes the following: The hot fluid enters the core from the hot fluid inlet and flows out from the flow hole of the core, passes through the baffle in the heat exchange unit one and enters the hot fluid channel in the heat exchange unit one, then turns back from the hot fluid channel of the heat exchange unit one, passes through the baffle and core in the heat exchange unit one and enters the heat exchange unit two, then passes through the baffle in the heat exchange unit two and enters the hot fluid channel in the heat exchange unit two, then turns back from the hot fluid channel of the heat exchange unit two, passes through the baffle, core and heat exchange unit one in the heat exchange unit two and enters the hot fluid channel in the heat exchange unit three, then turns back from the hot fluid channel of the heat exchange unit three. Return, pass through heat exchange unit 1, core, heat exchange unit 2, enter the hot fluid channel in heat exchange unit 4, then turn back from the hot fluid channel in heat exchange unit 4, pass through heat exchange unit 2, core, heat exchange unit 1, heat exchange unit 3, enter the hot fluid channel in heat exchange unit 5, then turn back from the hot fluid channel in heat exchange unit 5, pass through heat exchange unit 3, heat exchange unit 1, core, heat exchange unit 2, heat exchange unit 4, enter the hot fluid channel in heat exchange unit 6, finally pass through the heat conduction plate, cold fluid plate, and partition in heat exchange unit 6, and finally be discharged from the hot fluid outlet on the pressure plate; After the cold fluid enters from the cold fluid inlet on the pressure plate connected to the heat exchange unit six, it passes through the partition in the heat exchange unit six and enters the cold fluid channel in the heat exchange unit six, and then passes through the heat exchange unit four, heat exchange unit two, core, heat exchange unit one, heat exchange unit three in turn, and enters the cold fluid channel in the heat exchange unit five; then it turns back from the cold fluid channel in the heat exchange unit five and passes through the heat exchange unit three, heat exchange unit one, core, heat exchange unit two in turn, and enters the cold fluid channel in the heat exchange unit four , then turn back from the cold fluid channel in the heat exchange unit four and pass through the heat exchange unit two, the core, and the heat exchange unit one in sequence to enter the cold fluid channel in the heat exchange unit three; then turn back from the cold fluid channel in the heat exchange unit three and pass through the heat exchange unit one and the core in sequence to enter the cold fluid channel of the heat exchange unit two; then turn back from the cold fluid channel in the heat exchange unit two and pass through the core to enter the cold fluid channel of the heat exchange unit one, then pass through the heat conduction plate, hot fluid plate, and partition in the heat exchange unit one to enter the core, and finally be discharged from the cold fluid outlet on the core; Both the hot fluid and the cold fluid flow in a swirl around the core, forming a double swirl.

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