Hydronic heat exchanger

Abstract

The application discloses a loop heat pipe heat exchanger, which comprises an evaporation plate, a gas collecting plate and a plurality of condensing pipes, the evaporation plate is formed with an evaporation cavity, the gas collecting plate is formed with a gas collecting cavity, the condensing pipes are provided with condensing cavities, the evaporation cavity, the condensing cavities and the gas collecting cavity are communicated to form a closed loop, the closed loop is provided with refrigerant, heat exchange channels are formed between adjacent condensing pipes, the condensing pipes are provided with fins to separate the condensing pipes, the fins are inwardly recessed to form inner recesses, a plurality of inner recesses are arranged at intervals, outer recesses are formed between adjacent inner recesses, and windows are arranged between adjacent inner recesses and outer recesses to communicate the inner recesses and the outer recesses. The application can make the refrigerant flow following the principle of gravity through the windows, realize the gravity power condition of the evaporation and condensation process, improve the circulation efficiency of the loop heat pipe heat exchanger and improve the heat exchange effect.

Description

Technical Field

[0001] This invention belongs to the field of heat exchanger technology, and particularly relates to loop thermosiphon heat exchangers. Background Technology

[0002] A loop thermosiphon heat exchanger is a device that achieves heat exchange through the siphon principle. It dissipates heat by utilizing the heat absorption and release during the phase change of the refrigerant and the principle of heat transfer through gravity. When the liquid inside the heat exchanger is heated, its volume expands, its density decreases, and it rises, replenished by the surrounding cold liquid, forming a natural circulation. Its advantage lies in achieving highly efficient heat exchange. Due to the requirements of product use and installation, as well as process limitations, the condenser tubes are installed horizontally. If the internal flow channels were perpendicular to the direction of gravity, the circulation force would be lost. Therefore, designs with compressed flow channels or straight inner fins cannot achieve gravity circulation. Summary of the Invention

[0003] The purpose of this invention is to solve the above-mentioned technical problems existing in the prior art and to provide a loop thermosiphon heat exchanger that enables the refrigerant to flow through the window following the principle of gravity, realizing the gravitational dynamic conditions of the evaporation and condensation process, improving the circulation efficiency of the loop thermosiphon heat exchanger and enhancing the heat exchange effect.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A loop thermosiphon heat exchanger is characterized by comprising an evaporating plate, a collecting plate, and several condensing tubes. The evaporating plate forms an evaporating cavity, the collecting plate forms a collecting cavity, and the condensing tubes are provided with condensing cavities. The evaporating cavity, condensing cavity, and collecting cavity are connected to form a closed loop. A refrigerant is provided in the closed loop. A heat exchange channel is formed between adjacent condensing tubes. Fins are provided inside the condensing tubes to separate them. The fins are recessed inward to form inner grooves. Multiple inner grooves are arranged at intervals. An outer groove is formed between adjacent inner grooves. An opening is provided between adjacent inner grooves and outer grooves to connect the inner grooves and outer grooves.

[0005] Furthermore, the inner groove includes a plurality of first grooves and a plurality of second grooves, the first grooves and the second grooves being arranged alternately along the extension direction of the inner groove, and the first grooves and the second grooves being staggered vertically to form an opening.

[0006] Furthermore, the vertical projections of adjacent windows overlap each other.

[0007] Furthermore, the vertical projections of adjacent windows are staggered.

[0008] Furthermore, the bottom surfaces of the first groove and the second groove are inclined.

[0009] Furthermore, partition plates are provided between adjacent condenser tubes to separate the heat exchange channels.

[0010] Furthermore, the separator includes multiple bends and multiple partitions, which are arranged at intervals and connected end to end to form the separator. The bends are fixedly connected to the condenser tube.

[0011] Furthermore, the evaporator plate includes a connecting part and a heat-absorbing part. The connecting part is connected to the condenser tube, and the heat-absorbing part is used to connect the heat dissipation components. The heat-absorbing part is located below the connecting part.

[0012] Furthermore, the connecting section is provided with multiple spaced-apart manifolds to separate the evaporation chamber located in the connecting section.

[0013] Furthermore, the heat absorption section is provided with multiple spaced guide columns to divide the evaporation chamber in the heat absorption section into several flow channels.

[0014] The present invention, by adopting the above-described technical solution, has the following beneficial effects: This invention separates the condenser tubes by setting fins inside the tubes. The fins are recessed inward to form inner grooves. Multiple inner grooves are arranged at intervals, and outer grooves are formed between adjacent inner grooves. Openings are provided between adjacent inner and outer grooves to connect the inner and outer grooves, thereby realizing vertical communication between the inner and outer grooves. This allows the refrigerant to flow through the openings according to the principle of gravity, realizing the gravitational dynamic conditions of the evaporation and condensation process, improving the circulation efficiency of the loop thermosiphon heat exchanger, and enhancing the heat exchange effect. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the loop thermosiphon heat exchanger of the present invention; Figure 2 This is a schematic diagram of the connection between the evaporator plate, the gas collecting plate, and the condenser tube in this invention; Figure 3 This is a schematic diagram of the closed loop structure in this invention; Figure 4 This is a schematic diagram of the heat exchange channel in this invention; Figure 5 This is a schematic diagram of the condenser tube in this invention; Figure 6 This is a schematic diagram of the connection between the condenser tube and the fins in this invention; Figure 7 This is a schematic diagram of the structure of the fin in Embodiment 1 of the present invention; Figure 8 for Figure 7 Enlarged view of the structure at point A in the middle; Figure 9 This is a left view of the fins in this invention; Figure 10for Figure 9 Enlarged view of the structure at point B; Figure 11 This is a schematic diagram of the structure of the misaligned fins in Embodiment 2 of the present invention; Figure 12 This is a schematic diagram of the structure of the fins with inclined bottom surfaces of the first and second grooves in Embodiment 3 of the present invention; Figure 13 This is a schematic diagram of the evaporation plate in this invention; Figure 14 This is a schematic diagram of the connecting part and the heat-absorbing part in this invention; Figure 15 This is a schematic diagram of the structure of the separator in this invention; Figure 16 This is a schematic diagram of the connection between the bent portion and the partition portion in this invention; Figure 17 This is a schematic diagram of the flow of the cooling medium in the fins in this invention.

[0016] In the diagram, 1-evaporator plate; 2-gas collecting plate; 3-condenser tube; 4-evaporator chamber; 5-gas collecting chamber; 6-condenser chamber; 7-heat exchange channel; 8-fin; 9-inner groove; 10-outer groove; 11-window; 12-first groove; 13-second groove; 14-separator plate; 15-bend; 16-separator; 17-connection; 18-heat absorption section; 19-flow distribution column; 20-flow guide column. Detailed Implementation

[0017] like Figures 1 to 17 As shown, the loop thermosiphon heat exchanger of the present invention includes an evaporator plate 1, a gas collecting plate 2, and several condenser tubes 3. The evaporator plate 1 forms an evaporation chamber 4, the gas collecting plate 2 forms a gas collecting chamber 5, and the condenser tubes 3 are provided with condensation chambers 6. The evaporator chamber 4, condensation chamber 6, and gas collecting chamber 5 are connected to form a closed loop, and a refrigerant is provided in the closed loop. A heat exchange channel 7 is formed between adjacent condenser tubes 3. Fins 8 are provided inside the condenser tubes 3 to separate them. The fins 8 are recessed inward to form inner grooves 9. Multiple inner grooves 9 are arranged at intervals, and outer grooves 10 are formed between adjacent inner grooves 9. An opening 11 is provided between adjacent inner grooves 9 and outer grooves 10 to connect the inner grooves 9 and outer grooves 10. Through the above arrangement, the adjacent inner grooves 9 and outer grooves 10 can be connected, allowing the refrigerant to flow through the opening 11 according to the principle of gravity, realizing the gravitational dynamic conditions of the evaporation and condensation process, improving the circulation efficiency of the loop thermosiphon heat exchanger, and enhancing the heat exchange effect. Loop thermosiphon heat exchangers generally employ two closed loops. The evaporator plate 1 is designed with an upper and lower row structure, separated in the middle, and the upper and lower rows work independently.

[0018] like Figures 5 to 10As shown, in one implementation, the inner groove 9 includes a plurality of first grooves 12 and a plurality of second grooves 13. The first grooves 12 and the second grooves 13 are arranged alternately along the extending direction of the inner groove 9, and the first grooves 12 and the second grooves 13 are vertically offset to form an opening 11. With the above arrangement, the opening 11 on the fin 8 can be realized, and the opening 11 formed by the offset of the first grooves 12 and the second grooves 13 can eliminate tedious steps such as drilling, and can be formed in one step by stamping, which has high production efficiency and saves production costs.

[0019] As one implementation, the vertical projections of adjacent windows 11 overlap. The windows 11 are vertically continuous, which facilitates the flow of the refrigerant within the condensing chamber 6, thus ensuring gravity circulation in the closed loop.

[0020] like Figure 11 As shown, as another implementation, the vertical projections of adjacent windows 11 are staggered. This arrangement effectively prevents excessive liquid refrigerant from flowing through the windows 11 to the bottom of the condenser tube 3, thus ensuring the lateral flow of the refrigerant, improving the circulation efficiency of the heat exchanger, and enhancing the heat exchange effect.

[0021] like Figure 12 As shown, in one implementation, the bottom surfaces of the first groove 12 and the second groove 13 are inclined. This arrangement better guides the liquid refrigerant, facilitating its return to the evaporation chamber 4 and improving the gravity circulation effect of the heat exchanger.

[0022] like Figure 15 and Figure 16 As shown, as one implementation, a partition 14 is provided between adjacent condenser tubes 3 to separate the heat exchange channels 7. Through the above arrangement, the heat exchange channels 7 can be separated, effectively guiding the heat exchange medium, and the partition 14 can also play a supporting role, improving the overall strength of the heat exchanger, making the heat exchanger less prone to damage and extending its service life.

[0023] Specifically, the partition plate 14 includes multiple bent portions 15 and multiple partition portions 16. The bent portions 15 and partition portions 16 are arranged at intervals and connected end to end to form the partition plate 14. The bent portions 15 are fixedly connected to the condenser tube 3. With the above arrangement, the partition plate 14 can be made to divide the second heat exchange channel 7 in a wave-like shape, and can be integrally formed, improving processing and assembly efficiency.

[0024] like Figure 13 and Figure 14As shown, in one implementation, the evaporator plate 1 includes a connecting portion 17 and a heat-absorbing portion 18. The connecting portion 17 is connected to the condenser tube 3, and the heat-absorbing portion 18 is used to connect components that need heat dissipation. The heat-absorbing portion 18 is located below the connecting portion 17. Components that need heat dissipation are generally located on the side of the heat-absorbing portion 18 away from the condenser tube. The liquid refrigerant in the heat-absorbing portion 18 absorbs heat, evaporates into a gaseous state, and moves upwards carrying heat, then passes through the connecting portion 17 and enters the condenser tube 3.

[0025] Specifically, the connecting part 17 is provided with multiple spaced-apart flow distribution columns 19 to separate the evaporation chamber 4 within the connecting part 17. The connecting part 17 is a transition cavity used for the docking of the evaporator plate 1 and the condenser tube 3, serving to distribute the gaseous refrigerant and collect the liquid refrigerant. The flow distribution columns 19 are generally square columns, but can also be cylindrical or long columns with chamfered ends. The densely arranged flow distribution columns 19 allow the refrigerant to flow through each other within the connecting part 17, and can also connect the bottom plate and the top plate of the evaporator plate 1 simultaneously, improving the overall connection strength of the evaporator plate 1.

[0026] In this embodiment, the heat-absorbing section 18 is provided with a plurality of spaced-apart guide columns 20 to divide the evaporation chamber 4 in the heat-absorbing section 18 into several flow channels. The heat-absorbing section 18 is a heat-absorbing chamber, and the guide columns 20 are generally arranged vertically, which allows the refrigerant to evaporate upward with heat. In addition, the arrangement of the guide columns 20 can also increase the contact area of ​​the refrigerant medium in the heat-absorbing section 18 and improve the heat absorption effect.

[0027] In operation, the liquid refrigerant in the heat-absorbing section 18 absorbs heat from the heat-dissipating components, evaporates into a gaseous state, and moves upwards with the absorbed heat into the connecting section 17, and then flows into the condenser tube 3. For example... Figure 17 As shown, in the condenser tube 3, the gaseous refrigerant flows upward through the window 11 from the outer groove 10 into the inner groove 9 or from the inner groove 9 into the outer groove 10, and then flows laterally into the gas collecting chamber 5. The liquid refrigerant, under the action of gravity, flows downward through the window 11 from the outer groove 10 into the inner groove 9 or from the inner groove 9 into the outer groove 10, and then flows laterally back into the evaporation chamber 4, and finally back into the heat absorption section 18, completing the gravity circulation of the refrigerant.

[0028] This invention provides a method to separate the condenser tube 3 by setting fins 8 inside the condenser tube 3. The fins 8 are recessed inward to form an inner groove 9. Multiple inner grooves 9 are arranged at intervals, and an outer groove 10 is formed between adjacent inner grooves 9. An opening 11 is provided between adjacent inner grooves 9 and outer grooves 10 to connect the inner grooves 9 and outer grooves 10, thereby realizing the vertical connection between the inner grooves 9 and outer grooves 10. This allows the refrigerant to flow through the opening 11 according to the principle of gravity, realizing the gravitational dynamic conditions of the evaporation and condensation process.

[0029] The above are merely specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on the present invention to solve essentially the same technical problems and achieve essentially the same technical effects are all covered within the protection scope of the present invention.

Claims

1. A loop thermosiphon heat exchanger, characterized in that: The device includes an evaporator plate, a gas collecting plate, and several condenser tubes. The evaporator plate forms an evaporation chamber, the gas collecting plate forms a gas collecting chamber, and the condenser tubes have condensation chambers. The evaporator chamber, the condensation chamber, and the gas collecting chamber are connected to form a closed loop. A refrigerant is provided in the closed loop. A heat exchange channel is formed between adjacent condenser tubes. Fins are provided inside the condenser tubes to separate them. The fins are recessed inward to form inner grooves. Multiple inner grooves are arranged at intervals. An outer groove is formed between adjacent inner grooves. An opening is provided between adjacent inner grooves and outer grooves to connect the inner grooves and the outer grooves.

2. The loop thermosiphon heat exchanger according to claim 1, characterized in that: The inner groove includes a plurality of first grooves and a plurality of second grooves, the first grooves and the second grooves being arranged alternately along the extension direction of the inner groove, and the first grooves and the second grooves being vertically offset to form the window.

3. The loop thermosiphon heat exchanger according to claim 1, characterized in that: The vertical projections of adjacent windows overlap each other.

4. The loop thermosiphon heat exchanger according to claim 1, characterized in that: The vertical projections of adjacent windows are staggered.

5. The loop thermosiphon heat exchanger according to claim 2, characterized in that: The bottom surfaces of the first groove and the second groove are inclined.

6. The loop thermosiphon heat exchanger according to claim 1, characterized in that: A partition is provided between adjacent condenser tubes to separate the heat exchange channels.

7. The loop thermosiphon heat exchanger according to claim 6, characterized in that: The separator includes multiple bends and multiple partitions, which are arranged at intervals and connected end to end to form the separator. The bends are fixedly connected to the condenser tube.

8. The loop thermosiphon heat exchanger according to claim 1, characterized in that: The evaporator plate includes a connecting part and a heat-absorbing part. The connecting part is connected to the condenser tube, and the heat-absorbing part is used to connect components that need to dissipate heat. The heat-absorbing part is located below the connecting part.

9. The loop thermosiphon heat exchanger according to claim 8, characterized in that: The connecting section is provided with multiple spaced-apart manifolds to separate the evaporation chamber located in the connecting section.

10. The loop thermosiphon heat exchanger according to claim 8, characterized in that: The heat absorption section is provided with multiple spaced guide columns to divide the evaporation chamber in the heat absorption section into several flow channels.

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