A replaceable core type heat exchanger

Abstract

The utility model provides a replaceable core formula heat exchanger belongs to heat exchanger technical field, including pressure -bearing casing, the pressure -bearing casing is horizontal cylindrical structure, is equipped with the overhaul opening on its both sides side wall, the pressure -bearing casing inner bottom is provided with the mounting base, is equipped with a plurality of installation groove on the mounting base, the heat exchange core body is detachably connected in the installation groove. The utility model can realize the individual replacement of heat exchange core body, does not need the overall replacement when the trouble, and can adjust the heat exchange core body quantity according to the system need, improves its flexibility.

Description

Technical Field

[0001] This utility model belongs to the field of heat exchanger technology, and in particular relates to a replaceable core heat exchanger. Background Technology

[0002] Supercritical carbon dioxide Brayton cycle is considered one of the core power technologies for next-generation concentrated solar power (CSP), fourth-generation nuclear energy, and waste heat recovery due to its advantages such as high thermal efficiency, compact system, environmentally friendly working fluid, and low cost. To achieve near-theoretical efficiency, the system needs to employ a high-efficiency regenerator to recover turbine exhaust heat to preheat the low-temperature supercritical carbon dioxide at the compressor outlet. However, supercritical carbon dioxide undergoes drastic property changes near the critical point and operates under high temperature and high pressure conditions, placing extremely high demands on the performance and structural strength of the heat exchanger.

[0003] Traditional supercritical carbon dioxide Brayton cycle heat exchange equipment mainly uses printed circuit board heat exchangers. These heat exchangers have advantages such as high efficiency, compactness, and pressure resistance. However, due to their high degree of structural integration, they cannot be detected or repaired after damage, and the entire unit must be replaced when a fault occurs. Furthermore, their heat exchange capacity is fixed and cannot be expanded or adjusted according to system needs. Utility Model Content

[0004] In view of the defects or deficiencies in the existing technology, this utility model provides a replaceable core heat exchanger, which can realize the individual replacement of the heat exchange core, and does not require the whole system to be replaced when a failure occurs. Furthermore, the number of heat exchange cores can be adjusted according to the system needs, thereby improving its flexibility.

[0005] To achieve the above objectives, the present invention adopts the following technical solution; An embodiment of this utility model provides a replaceable core heat exchanger, including a pressure-bearing shell, which is a horizontal cylindrical structure with inspection ports on its two side walls. A mounting base is provided at the bottom of the pressure-bearing shell, and multiple mounting slots are provided on the mounting base. A heat exchange core is detachably connected to the mounting slot.

[0006] Furthermore, a first fluid inlet pipe and a first fluid outlet pipe are provided on the top outer wall of the pressure-bearing shell. The bottom end of the first fluid inlet pipe is connected to multiple first fluid inlet branch pipes, and the bottom end of the first fluid outlet pipe is connected to multiple first fluid outlet branch pipes. The multiple first fluid inlet branch pipes and the multiple first fluid outlet branch pipes are respectively connected to multiple heat exchange cores.

[0007] Furthermore, the top of the heat exchange core is provided with a first fluid inlet and a first fluid outlet. The first fluid inlet and the first fluid inlet branch pipe, as well as the first fluid outlet and the first fluid outlet branch pipe, are detachably connected by a flexible connection component.

[0008] Furthermore, the heat exchange core is provided with a first fluid microchannel and a second fluid microchannel, and both the first fluid microchannel and the second fluid microchannel are provided with multiple branch channels.

[0009] Furthermore, the two ends of the first fluid microchannel are respectively connected to the first fluid inlet and the second fluid outlet, and the two ends of the second fluid microchannel are respectively connected to the second fluid inlet and the second fluid outlet opened on the bottom surface of the heat exchange core.

[0010] Furthermore, a second fluid inlet pipe and a second fluid outlet pipe are provided on the bottom outer wall of the pressure-bearing housing. The top end of the second fluid inlet pipe is connected to multiple second fluid inlet branch pipes, and the top end of the second fluid outlet pipe is connected to multiple second fluid outlet branch pipes. The multiple second fluid inlet branch pipes and the multiple second fluid outlet branch pipes are respectively provided with multiple mounting slots.

[0011] Furthermore, the mounting groove is symmetrically provided with a second fluid inlet port and a second fluid outlet port. Both the first fluid inlet port and the second fluid outlet port are provided through the bottom surface of the mounting groove. The bottom end of the second fluid inlet port is connected to the second fluid inlet branch pipe, and the bottom end of the second fluid outlet port is connected to the second fluid outlet branch pipe.

[0012] Furthermore, the top ends of both the second fluid inlet port and the second fluid outlet port protrude from the upper surface of the mounting groove. The second fluid inlet port is corresponding to the second fluid inlet port on the bottom surface of the heat exchange core, and the second fluid outlet port is corresponding to the second fluid outlet port on the bottom surface of the heat exchange core.

[0013] Furthermore, a first flow sensor is installed on the first fluid inlet pipe, the first fluid outlet pipe, the second fluid inlet pipe, and the second fluid outlet pipe, and a second flow sensor and a flow regulating valve assembly are installed on the first fluid inlet branch pipe, the second fluid outlet branch pipe, the second fluid inlet branch pipe, and the second fluid outlet branch pipe.

[0014] Furthermore, the two ends of the heat exchange core are detachably connected to the mounting base via a locking mechanism. The locking mechanism includes a latch base, which is fixed to the side walls of the mounting base on both sides. A pressure plate is hinged to the top of the latch base via a pivot, and a U-shaped pull ring is hinged to the middle of the pressure plate. Hook-shaped buckle plates are correspondingly provided on the side walls of the heat exchange core.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model features a mounting base at the bottom of the pressure-bearing housing, with multiple mounting slots on the base. Heat exchanger cores are detachably connected within these slots. When the heat exchanger fails, only the faulty core can be replaced, eliminating the need to replace the entire heat exchanger. This significantly shortens maintenance time, reduces total lifespan costs, and improves system reliability and availability. Furthermore, the number of heat exchanger cores can be adjusted according to system needs, adapting to dynamic system requirements and enhancing flexibility.

[0016] 2. This utility model incorporates a first fluid microchannel and a second fluid microchannel within the heat exchange core. Both the first and second fluid microchannels are equipped with multiple branch channels, which are designed as highly optimized biomimetic dendritic structures and evenly distributed throughout the entire heat exchange core. This structure fundamentally optimizes the uniformity of fluid distribution within the heat exchange core, effectively eliminates dead zones, and reduces flow resistance. The two sets of dendritic channels of the first and second fluids interweave and closely adhere to each other in three-dimensional space, forming a large heat transfer interface and achieving efficient heat transfer.

[0017] 3. By installing flow sensors and flow regulating valve groups on each fluid inlet and outlet branch pipe, this utility model can accurately locate the faulty heat exchanger when a fault occurs, and completely cut off the pipeline to the faulty heat exchanger through remote operation, thereby achieving online fault isolation and ensuring that the rest of the system can operate at reduced capacity, avoiding complete shutdown. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the external structure of the heat exchanger in an embodiment of this utility model; Figure 2 This is a schematic diagram of the internal structure of the heat exchanger in an embodiment of this utility model; Figure 3 This is a schematic diagram of the internal structure of the heat exchange core in an embodiment of this utility model; Figure 4 This is a diagram showing the connection relationship between the heat exchange core and the mounting base in an embodiment of this utility model; Figure 5 This is a schematic diagram of the locking mechanism structure in an embodiment of the present utility model; Figure 6 This is a schematic diagram of the top connection structure of the heat exchange core in an embodiment of this utility model; Among them, 1. Pressure-bearing shell; 101. First fluid inlet pipe; 102. First fluid outlet pipe; 103. First fluid inlet branch pipe; 104. First fluid outlet branch pipe; 105. Second fluid inlet pipe; 106. Second fluid outlet pipe; 107. Second fluid inlet branch pipe; 108. Second fluid outlet branch pipe; 109. First flow sensor; 110. Flow regulating valve assembly; 2. End cap; 3. End cap flange; 4. Heat exchange core; 401. First fluid inlet port; 402. First fluid outlet port; 403. First fluid micro Channel; 404, Second fluid microchannel; 405, Second fluid inlet; 406, Second fluid outlet; 5, Inspection port; 6, Mounting base; 601, Mounting groove; 602, Second fluid inlet interface; 603, Second fluid outlet interface; 604, Sealing groove; 605, Sealing ring; 7, Locking mechanism; 701, Hook and loop base; 702, Pressure plate; 703, U-shaped pull ring; 704, Hook-type buckle plate; 8, Flexible connection assembly; 801, Metal bellows; 802, Threaded joint; 803, Union joint; 804, Retaining ring. Detailed Implementation

[0019] In this embodiment, the first fluid and the second fluid are used only to distinguish between two different fluids, wherein the first fluid is high-temperature, low-pressure supercritical carbon dioxide, and the second fluid is low-temperature, high-pressure supercritical carbon dioxide.

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] A typical embodiment of this utility model is as follows: Figure 1 As shown, a replaceable core heat exchanger includes a pressure-bearing shell 1, which is a horizontal cylindrical structure. Both ends of the pressure-bearing shell 1 are provided with end caps 2, which are fixed to the end cap flanges 3 at both ends of the pressure-bearing shell 1 by bolts. The pressure-bearing shell 1 serves as the main pressure-bearing boundary and structural support frame of the equipment. Multiple heat exchange cores 4 are detachably connected inside the pressure-bearing shell 1. Inspection ports 5 are provided on both side walls of the pressure-bearing shell 1. Inspection plates are detachably connected to the inspection ports 5 by bolts. During maintenance, the heat exchange cores 4 inside the pressure-bearing shell 1 can be replaced through the inspection ports 5.

[0022] like Figure 2 As shown, a mounting base 6 is provided at the bottom of the pressure-bearing shell 1. The length of the mounting base 6 is the same as that of the pressure-bearing shell 1. Multiple mounting slots 601 are provided on the mounting base 6. The multiple mounting slots 601 are arranged side by side along the length direction of the mounting base 6, and the distance between two adjacent mounting slots 601 is the same. A heat exchange core 4 is placed in the mounting slot 601. The heat exchange core 4 is detachably connected to the mounting base 6 through a locking mechanism 7.

[0023] A first fluid inlet pipe 101 and a first fluid outlet pipe 102 are provided on the top outer wall of the pressure-bearing shell 1. The first fluid inlet pipe 101 and the first fluid outlet pipe 102 are symmetrically arranged. The top ends of the first fluid inlet pipe 101 and the first fluid outlet pipe 102 extend to the outside of the pressure-bearing shell 1 and are provided with connecting flanges for connecting to the external supercritical carbon dioxide circulation system pipeline. The bottom ends of the first fluid inlet pipe 101 and the first fluid outlet pipe 102 are located inside the pressure-bearing shell 1. The bottom end of the first fluid inlet pipe 101 is connected to multiple first fluid inlet branch pipes 103, and the bottom end of the first fluid outlet pipe 102 is connected to multiple first fluid outlet branch pipes 104. The multiple first fluid inlet branch pipes 103 and the multiple first fluid outlet branch pipes 104 are respectively connected to multiple heat exchange cores 4.

[0024] Specifically, the top surface of the heat exchange core 4 is provided with a first fluid inlet 401 and a first fluid outlet 402. The first fluid inlet branch pipe 103 and the first fluid inlet 401, as well as the first fluid outlet branch pipe 104 and the first fluid outlet 402, are connected by a flexible connection component 8 to achieve convenient replacement and reliable sealing of the heat exchange core 4.

[0025] like Figure 6 As shown, taking the first fluid inlet side as an example, the flexible connection component 8 includes a metal bellows 801. The top end of the metal bellows 801 is welded and fixed to the first fluid inlet branch pipe 103 to ensure the sealing of the pipeline. The metal bellows 801 serves as the main body of the flexible connection component 8, and its corrugated structure gives the flexible connection component 8 the elastic ability to absorb displacement and installation errors.

[0026] A threaded connector 802 is fixed at the first fluid inlet 401. The bottom end of the metal bellows 801 is connected to the threaded connector 802 through a union 803. Specifically, a retaining ring 804 is provided at the bottom end face of the metal bellows 801. The diameter of the retaining ring 804 is larger than the diameter of the metal bellows 801. The union 803 is sleeved on the outside of the metal bellows 801 and is movably connected to the metal bellows 801. The union 803 is a cylindrical connector with openings at both the top and bottom. The diameter of the opening at the top is smaller than the diameter of the retaining ring 804.

[0027] The bottom end of the threaded connector 802 is welded to the top end of the first fluid inlet 401. The top end of the threaded connector 802 is provided with an external thread. The bottom opening of the union 803 is adapted to the threaded connector 802. The inner wall of the union 803 is provided with an internal thread. The detachable connection between the first fluid inlet branch pipe 103 and the first fluid inlet 401 is realized through the threaded connection between the union 803 and the threaded connector 802.

[0028] During installation, after the heat exchange core 4 is placed in place, align the union 803 fitted onto the metal bellows 801 with the threaded joint 802 on the top of the heat exchange core 4, and then tighten the union 803 onto the threaded joint 802. The tightening force of the union 803, through the action of the inner shoulder, axially presses the bottom end of the metal bellows 801 and the top end of the threaded joint 802 together, thereby forming a reliable seal that can withstand high temperature and high pressure.

[0029] Each heat exchange core 4 is a microchannel heat exchange unit that can be independently installed and disassembled. The heat exchange core 4 adopts selective laser melting technology and uses high-temperature and high-pressure resistant 316L stainless steel metal powder as raw material. It is formed in one piece by 3D printing. Its interior contains two sets of intersecting microchannels for the flow of hot and cold fluids.

[0030] Specifically, such as Figure 3 As shown, the heat exchange core 4 is provided with a first fluid microchannel 403 and a second fluid microchannel 404. Both the first fluid microchannel 403 and the second fluid microchannel 404 are provided with multiple branch channels. The branch channels are designed as a highly optimized biomimetic dendritic structure and are evenly distributed throughout the heat exchange core 4. This structure can fundamentally optimize the uniformity of fluid distribution inside the heat exchange core 4, effectively eliminate flow dead zones, and reduce flow resistance. The two sets of dendritic channels of the first fluid and the second fluid are intertwined and closely fitted in three-dimensional space to form a huge heat transfer interface, realizing efficient heat transfer.

[0031] The first fluid microchannel 403 is connected to a first fluid inlet 401 and a first fluid outlet 402 at its two ends, respectively. The first fluid enters the first fluid microchannel 403 through the first fluid inlet 401 and flows out through the first fluid outlet 402 after heat exchange. A second fluid inlet 405 and a second fluid outlet 406 are provided on the bottom surface of the heat exchange core 4. The second fluid microchannel 404 is connected to the second fluid inlet 405 and the second fluid outlet 406 at its two ends, respectively. The second fluid enters the second fluid microchannel 404 through the second fluid inlet 405 and flows out through the second fluid outlet 406 after heat exchange.

[0032] A second fluid inlet pipe 105 and a second fluid outlet pipe 106 are provided on the bottom outer wall of the pressure-bearing housing 1. The second fluid inlet pipe 105 and the second fluid outlet pipe 106 are symmetrically arranged. The bottom ends of the second fluid inlet pipe 105 and the second fluid outlet pipe 106 extend to the outside of the pressure-bearing housing 1 and are provided with connecting flanges for connecting to the external supercritical carbon dioxide circulation system pipeline. The top ends of the second fluid inlet pipe 105 and the second fluid outlet pipe 106 are located inside the pressure-bearing housing 1. The top end of the second fluid inlet pipe 105 is connected to multiple second fluid inlet branch pipes 107, and the top end of the second fluid outlet pipe 106 is connected to multiple second fluid outlet branch pipes 108. The multiple second fluid inlet branch pipes 107 and the multiple second fluid outlet branch pipes 108 are respectively provided with multiple mounting slots 601.

[0033] Specifically, such as Figure 4 As shown, a second fluid inlet port 602 and a second fluid outlet port 603 are symmetrically arranged on the mounting groove 601. Both the second fluid inlet port 602 and the second fluid outlet port 603 penetrate the bottom surface of the mounting groove 601. The bottom end of the second fluid inlet port 602 is connected to the second fluid inlet branch pipe 107, and the bottom end of the second fluid outlet port 603 is connected to the second fluid outlet branch pipe 108.

[0034] The top ends of the second fluid inlet port 602 and the second fluid outlet port 603 both protrude from the upper surface of the mounting groove 601. The second fluid inlet port 602 is corresponding to the second fluid inlet port 405 on the bottom surface of the heat exchange core 4, and the second fluid outlet port 603 is corresponding to the second fluid outlet port 406 on the bottom surface of the heat exchange core 4. When the heat exchange core 4 is placed in the mounting groove 601, the second fluid inlet port 602 and the second fluid outlet port 603 are respectively inserted into the second fluid inlet port 405 and the second fluid outlet port 406 to achieve communication with the second fluid microchannel 404.

[0035] Both the second fluid inlet port 602 and the second fluid outlet port 603 have sealing grooves 604 on their outer tops. A sealing ring 605 is provided in the sealing groove 604. When the heat exchange core 4 is placed in the mounting groove 601, the sealing ring 605 can be used to seal the heat exchange core 4 and the mounting base 6.

[0036] In this embodiment, the sealing ring 605 is a metal C-shaped ring sealing ring, which has the characteristics of high temperature and high pressure resistance.

[0037] In this embodiment, the heat exchange core 4 is configured as a block with standard external dimensions and interface definitions. Fluid inlets and outlets are provided on its bottom surface, which are adapted to the fluid interfaces provided on the mounting base 6 in terms of position, size and shape. This standardized interface design ensures that any heat exchange core 4 can be installed in any mounting slot 601, and that after the heat exchange core 4 is installed in place, its internal microchannels can achieve precise fluid communication with the corresponding fluid pipes.

[0038] Furthermore, a first flow sensor 109 is provided on the first fluid inlet pipe 101, the first fluid outlet pipe 102, the second fluid inlet pipe 105, and the second fluid outlet pipe 106 to detect the flow rate of the first fluid or the second fluid and to confirm whether the heat exchanger is operating normally.

[0039] Second flow sensors are installed on the first fluid inlet branch pipe 103, the first fluid outlet branch pipe 104, the second fluid inlet branch pipe 107, and the second fluid outlet branch pipe 108. These sensors can detect the flow rate of the first or second fluid in each branch pipe. When a heat exchange core 4 malfunctions, the faulty heat exchange core 4 can be located using the second flow sensors.

[0040] Flow regulating valve groups 110 are installed on the first fluid inlet branch pipe 103, the first fluid outlet branch pipe 104, the second fluid inlet branch pipe 107, and the second fluid outlet branch pipe 108. By setting the flow regulating valve groups 110, the flow rate of the fluid entering each heat exchange core 4 can be independently controlled. During normal operation, it can be used to balance the flow distribution among the heat exchange cores 4. When a heat exchange core 4 is diagnosed as having a fault, it can be remotely operated to completely cut off the pipeline to the faulty heat exchange core 4, realize online fault isolation, ensure that the rest of the system can operate at reduced capacity, and avoid complete shutdown.

[0041] The heat exchange core 4 is detachably connected to the mounting base 6 at both ends via locking mechanisms 7, specifically, as follows: Figure 5As shown, the locking mechanism 7 uses a common spring latch, including a latch base 701. The latch base 701 is fixed to the side walls of the mounting base 6. A pressure plate 702 is hinged to the top of the latch base 701 via a pin. A U-shaped pull ring 703 is hinged to the middle of the pressure plate 702. Hook-shaped latch plates 704 are correspondingly provided on the side walls of the heat exchange core 4. When the heat exchange core 4 is placed in the mounting groove 601, the pressure plate 702 is lifted upwards, and the U-shaped pull ring 703, which is in a relaxed state, is hung on the heat exchange core. On the hook-shaped buckle plate 704 of 4, the pressure plate 702 is then pressed down. During the pressing process, due to the lever and linkage principle, the U-shaped pull ring 703 is pulled down forcefully, thereby tightening the hook-shaped buckle plate 704 and the entire heat exchange core 4 into the mounting groove 601. When the hinge point of the pressure plate 702 crosses the center line of the pin connecting it to the buckle base 701, the entire locking mechanism 7 will enter the over-center self-locking state, and will not be accidentally released even under severe vibration, thereby achieving the pressing of the heat exchange core 4.

[0042] During this period, the sealing ring 605 located between the heat exchange core 4 and the mounting groove 601 is deformed under pressure, thereby achieving a reliable seal.

[0043] By setting the locking mechanism 7, a detachable connection can be achieved between the heat exchange core 4 and the mounting base 6, and the heat exchange core 4 can be firmly fixed in the mounting groove 601 to resist the influence of fluid pressure and vibration. Under the locking force of the locking mechanism 7, a reliable and leak-free static seal is formed between the fluid inlet and outlet on the bottom surface of the heat exchange core 4 and the fluid interface in the mounting groove 601, which can withstand the high temperature and high pressure environment of the supercritical carbon dioxide system.

[0044] Working principle During initial installation, first remove the end caps at both ends of the pressure shell. Based on the system's heat exchange capacity requirements, insert the required number of heat exchange cores one by one from the opening end of the pressure shell. Place the heat exchange cores into the designated mounting slots. Then, connect the multiple first fluid inlet branches and multiple first fluid outlets, as well as the multiple first fluid outlet branches and multiple second outlets, using flexible connection components. Finally, use a locking mechanism to lock the heat exchange cores into the mounting slots. If there are empty mounting slots, use dedicated sealing blocks to seal them. After installation, reinstall and secure the end caps. If future expansion is required, simply repeat this process, adding heat exchange cores to the empty mounting slots. During the operation of the heat exchanger, the first fluid flows into the heat exchanger from the first fluid inlet pipe and is evenly distributed to each normally operating heat exchange core through multiple first fluid inlet branch pipes. Inside the heat exchange core, the first fluid microchannel and the second fluid microchannel exchange heat in a counter-current or cross-flow manner, releasing heat and reducing the temperature. The cooled first fluid flows out from each heat exchange core, through each first fluid outlet branch pipe, and finally out from the first fluid outlet pipe to enter the next stage of the cycle. During this process, the second fluid flows in from the second fluid inlet pipe and is distributed to each heat exchange core through multiple second fluid inlet branch pipes. After absorbing heat and heating up inside the heat exchange core, it flows out through each second fluid outlet branch pipe and is sent to the external reactor or heater for further heating.

[0045] When a heat exchanger malfunctions, the first flow sensor detects abnormal changes in the inlet and outlet flow rates of the first or second fluid, indicating a blockage or leak inside a heat exchange core. By monitoring the second flow sensors on each branch pipe, the faulty heat exchange core is precisely located. The operator first safely shuts down the system and depressurizes it, opens the inspection port to expose the internal modules, and then uses tools to loosen the union on the flexible connection assembly at the top of the faulty heat exchange core to separate it from the corresponding fluid branch pipe. Then, the locking mechanism is released from the faulty heat exchange core, and the faulty heat exchange core is removed. A good spare heat exchange core is placed in the installation slot, the union on the top is tightened first, and then it is tightened again through the locking mechanism. The inspection plate is installed to close the inspection port. After the system is pressure tested and no leaks are found, normal operation can be restored.

[0046] By installing a mounting base at the bottom of the pressure-bearing shell, with multiple mounting slots on the base, and allowing for detachable connection of the heat exchanger core within these slots, individual heat exchanger cores can be replaced individually in case of heat exchanger failure, eliminating the need to replace the entire heat exchanger. This significantly shortens maintenance time, reduces total lifecycle costs, and improves system reliability and availability. Furthermore, the number of heat exchanger cores can be adjusted according to system needs, adapting to dynamic system requirements and enhancing flexibility.

[0047] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A replaceable core heat exchanger, characterized in that, It includes a pressure-bearing shell, which is a horizontal cylindrical structure with inspection ports on its two side walls. An installation base is provided at the bottom of the pressure-bearing shell, and multiple installation slots are provided on the installation base. A heat exchange core is detachably connected to the installation slot.

2. A replaceable core heat exchanger as described in claim 1, characterized in that, The pressure-bearing shell is provided with a first fluid inlet pipe and a first fluid outlet pipe on its top outer wall. The bottom end of the first fluid inlet pipe is connected to multiple first fluid inlet branch pipes, and the bottom end of the first fluid outlet pipe is connected to multiple first fluid outlet branch pipes. The multiple first fluid inlet branch pipes and the multiple first fluid outlet branch pipes are respectively connected to multiple heat exchange cores.

3. A replaceable core heat exchanger as described in claim 2, characterized in that, The heat exchange core has a first fluid inlet and a first fluid outlet at its top. The first fluid inlet and the first fluid inlet branch pipe, as well as the first fluid outlet and the first fluid outlet branch pipe, are detachably connected by a flexible connection component.

4. A replaceable core heat exchanger as described in claim 3, characterized in that, The heat exchange core is provided with a first fluid microchannel and a second fluid microchannel, and both the first fluid microchannel and the second fluid microchannel are provided with multiple branch channels.

5. A replaceable core heat exchanger as described in claim 4, characterized in that, The first fluid microchannel is connected to the first fluid inlet and the second fluid outlet at both ends, and the second fluid microchannel is connected to the second fluid inlet and the second fluid outlet at both ends, which are respectively located on the bottom surface of the heat exchange core.

6. A replaceable core heat exchanger as described in claim 5, characterized in that, The pressure-bearing housing has a second fluid inlet pipe and a second fluid outlet pipe on its bottom outer wall. The top end of the second fluid inlet pipe is connected to multiple second fluid inlet branch pipes, and the top end of the second fluid outlet pipe is connected to multiple second fluid outlet branch pipes. The multiple second fluid inlet branch pipes and the multiple second fluid outlet branch pipes are respectively set to correspond to multiple mounting slots.

7. A replaceable core heat exchanger as described in claim 6, characterized in that, The mounting groove is symmetrically provided with a second fluid inlet port and a second fluid outlet port. Both the first fluid inlet port and the second fluid outlet port are provided through the bottom surface of the mounting groove. The bottom end of the second fluid inlet port is connected to the second fluid inlet branch pipe, and the bottom end of the second fluid outlet port is connected to the second fluid outlet branch pipe.

8. A replaceable core heat exchanger as described in claim 7, characterized in that, The top ends of the second fluid inlet and the second fluid outlet are both protruding from the upper surface of the mounting groove. The second fluid inlet is corresponding to the second fluid inlet on the bottom surface of the heat exchange core, and the second fluid outlet is corresponding to the second fluid outlet on the bottom surface of the heat exchange core.

9. A replaceable core heat exchanger as described in claim 6, characterized in that, A first flow sensor is installed on the first fluid inlet pipe, the first fluid outlet pipe, the second fluid inlet pipe, and the second fluid outlet pipe. A second flow sensor and a flow regulating valve assembly are installed on the first fluid inlet branch pipe, the second fluid outlet branch pipe, the second fluid inlet branch pipe, and the second fluid outlet branch pipe.

10. A replaceable core heat exchanger as described in claim 1, characterized in that, The heat exchange core is detachably connected to the mounting base at both ends by a locking mechanism. The locking mechanism includes a latch base, which is fixed on the side walls of the mounting base. A pressure plate is hinged to the top of the latch base via a pivot, and a U-shaped pull ring is hinged to the middle of the pressure plate. Hook-shaped buckle plates are correspondingly provided on the side walls of the heat exchange core.

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