A phase change heat exchanger

Abstract

This utility model belongs to the field of heat exchanger technology, specifically a phase change heat exchanger, including a shell. A frustum-shaped water inlet tank is fixedly connected to the upper end of the shell. The frustum-shaped water inlet tank has three branch ports, and the lower ends of each branch port are connected to a spiral heat exchange tube. Twelve phase change material containers are fixedly connected to the lower end of the frustum-shaped water inlet tank. Each phase change material container is encapsulated with phase change material. This utility model has a reasonable structure. The S-shaped spiral heat exchange tube is set in the shell. This design significantly extends the flow path of the fluid in the tube, thereby increasing the contact time and distance between the fluid and the heat exchange tube wall. Due to the extension of the path and the multiple changes in direction, the fluid is more likely to form turbulence, which greatly enhances the convective heat transfer coefficient between the fluid and the heat exchange tube wall. In this way, heat transfer becomes more efficient, thereby effectively improving the heat exchange efficiency of the entire heat exchanger.

Description

Technical Field

[0001] This utility model belongs to the field of heat exchanger technology, specifically a phase change heat exchanger. Background Technology

[0002] Phase change thermal energy storage technology has become a hot research area due to its significant advantages of constant temperature and high heat storage density during the heat storage process. This technology performs well in dealing with complex operating conditions such as discontinuous heat supply and mismatch between supply and demand time, and can effectively improve energy utilization efficiency. It is of great significance for alleviating energy pressure and reducing environmental pollution. Its application scenarios are wide-ranging, including the efficient utilization of solar energy, peak shifting and valley filling of power systems, recovery and reuse of industrial waste heat, and energy-saving applications in building heating and air conditioning systems, showing great development potential and market prospects.

[0003] Currently, various methods have been proposed for a phase change heat exchanger. For example, a patent application with publication number "CN215930660U" discloses a phase change heat storage heat exchanger in which a high-temperature fluid is introduced into the inlet pipe and enters the inlet tank. The high-temperature fluid is then diverted through several guide channels and diversion holes on the guide plate, allowing the high-temperature fluid to flow into each heat exchange tube. The high-temperature fluid undergoes efficient heat exchange with the phase change heat storage medium through the heat exchange tube. After heat exchange, the high-temperature fluid cools down and flows into the outlet tank. The outlet valve is opened to discharge the fluid in the outlet tank through the outlet pipe. However, the heat exchange tube is set straight inside the outer shell. The straight heat exchange tube makes the fluid flow relatively smoothly inside the tube, making it difficult to form turbulence. This results in a low convective heat transfer coefficient between the fluid and the heat exchange tube wall, and insufficient heat transfer, thereby reducing the overall heat exchange efficiency.

[0004] Therefore, this utility model provides a phase change heat exchanger. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: The phase change heat exchanger of this utility model includes a shell, a frustum-shaped water inlet tank fixedly connected to the upper end of the shell, three branch ports opened in the frustum-shaped water inlet tank, and a spiral heat exchange tube connected to the lower end of each branch port. Twelve phase change material containers are fixedly connected to the lower end of the frustum-shaped water inlet tank, and each phase change material container is encapsulated with phase change material. A branch mechanism for branching is installed in the frustum-shaped water inlet tank. A water outlet tank is fixedly connected to the bottom end of the shell, and the spiral heat exchange tube is connected to the water outlet tank. A heat dissipation mechanism for dissipating heat from the phase change material container is installed on the phase change material container. A water inlet is opened at the upper end of the frustum-shaped water inlet tank, and a water inlet pipe is connected to the water inlet. A water inlet valve is provided on the side wall of the water inlet pipe.

[0007] Preferably, the inner wall of the housing is provided with a heat insulation layer, which is firmly attached to the inner wall of the housing by an adhesive.

[0008] Preferably, the diversion mechanism includes a flow guiding frustum, which is fixedly installed at the bottom inner end of the frustum inlet tank and is located directly below the inlet.

[0009] Preferably, the heat dissipation mechanism includes a plurality of heat dissipation fins, which are evenly arranged on the side wall of the phase change material container. The phase change material container is tightly attached to the outer wall of the spiral heat exchange tube and is fixedly connected to it by a high-efficiency thermally conductive adhesive.

[0010] Preferably, three phase change material containers are distributed on the outer side of the spiral heat exchange tube, and the included angle between the phase change material containers is 120 degrees.

[0011] Preferably, the lower end of the water outlet tank is connected to a water outlet pipe, and a water outlet valve is provided on the water outlet pipe.

[0012] Preferably, three fixing posts are fixedly connected to the lower end of the housing, and each fixing post is fixedly connected to an anti-slip pad at its lower end.

[0013] Preferably, an insulation cover is bolted to the outside of the housing.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. The phase change heat exchanger of this utility model, by setting a spiral heat exchange tube in the shell, and the spiral heat exchange tube is S-shaped, the S-shaped spiral heat exchange tube extends the path of the fluid when flowing in the tube, increases the contact time and distance between the fluid and the heat exchange tube wall, thereby promoting the formation of turbulence in the fluid in the tube, enhancing the convective heat transfer coefficient between the fluid and the heat exchange tube wall, improving heat transfer, and thus improving the overall heat exchange efficiency.

[0016] 2. The phase change heat exchanger described in this utility model achieves efficient heat storage and stable heat release by encapsulating phase change material within a phase change material container. When a high-temperature fluid flows through the heat exchange tube, the phase change material can rapidly absorb and store a large amount of heat, achieving rapid heat storage and improving energy utilization efficiency. When the system temperature decreases or the supply of high-temperature fluid is interrupted, the phase change material can stably release the stored heat, providing a reliable heat source for the system, effectively meeting intermittent or discontinuous heat demand, and enhancing the system's flexibility and adaptability. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] Figure 1 This is a perspective view of the present invention;

[0019] Figure 2 This is a schematic diagram of the cross-sectional structure of the shell of this utility model;

[0020] Figure 3 This is a schematic diagram of the cross-sectional structure of the frustum-shaped water inlet tank of this utility model;

[0021] Figure 4 for Figure 2 A magnified schematic diagram of the structure of A in the middle.

[0022] In the diagram: 1. Shell; 2. Frustum-shaped water inlet tank; 3. Water inlet pipe; 4. Water inlet valve; 5. Fixing column; 6. Anti-slip pad; 7. Water outlet pipe; 8. Water outlet valve; 9. Water inlet; 10. Water outlet tank; 11. Phase change material container; 12. Spiral heat exchange tube; 13. Flow divider; 14. Flow guide frustum; 15. Insulation layer; 16. Heat dissipation fins; 17. Insulation cover; 18. Bolt. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0024] Specific implementation examples are given below.

[0025] like Figures 1 to 4As shown in the embodiment of this utility model, a phase change heat exchanger includes a shell 1. A frustum-shaped water inlet tank 2 is fixedly connected to the upper end of the shell 1. The frustum-shaped water inlet tank 2 has three branch ports 13, and the lower ends of each branch port 13 are connected to spiral heat exchange tubes 12. Twelve phase change material containers 11 are fixedly connected to the lower end of the frustum-shaped water inlet tank 2. Each phase change material container 11 is encapsulated with phase change material. A branch mechanism for branching is installed in the frustum-shaped water inlet tank 2. A water outlet tank 10 is fixedly connected to the bottom end of the shell 1. The spiral heat exchange tubes 12 are connected to the water outlet tank 10. A phase change material container 11 for heat dissipation is installed on the phase change material container 11. The internal temperature heat dissipation mechanism includes an inlet 9 at the upper end of the frustum-shaped water inlet tank 2, with an inlet pipe 3 connected to the inlet 9. An inlet valve 4 is installed on the side wall of the inlet pipe 3. During operation, high-temperature fluid enters the water inlet tank 2 through the inlet pipe 3 and the inlet 9. The inlet valve 4 regulates the flow rate, and the guide frustum 14 distributes the fluid to three branch ports 13 within the water inlet tank 2. The fluid then flows into the spiral heat exchange tube 12. The S-shaped design of the spiral heat exchange tube 12 extends the fluid flow path, increases the contact time with the tube wall, promotes turbulence, and improves the convective heat transfer coefficient. Heat is effectively transferred to the phase change material in the phase change material container 11, causing it to undergo a phase change and achieving efficient heat storage.

[0026] like Figure 4 As shown, the inner wall of the shell 1 is provided with a heat insulation layer 15. The heat insulation layer 15 is firmly attached to the inner wall of the shell 1 by an adhesive. Through the above structure, the heat loss in the shell 1 can be effectively reduced, the energy utilization efficiency of the heat exchanger can be improved, the energy waste caused by heat loss can be reduced, and the phase change material can absorb and utilize the heat of the high temperature fluid more fully, thus enhancing the heat storage effect.

[0027] like Figure 3 As shown, the flow-dividing mechanism includes a flow-guiding frustum 14, which is fixedly installed at the inner bottom of the frustum inlet tank 2. The flow-guiding frustum 14 is located directly below the inlet 9. Through the above structure, the design of the flow-guiding frustum 14 reasonably guides the flow direction of the fluid. Since the shape of the flow-guiding frustum 14 is a frustum, the fluid will flow downward along the side wall of the flow-guiding frustum 14 when it comes into contact with the flow-guiding frustum 14. This allows the fluid to be evenly distributed before entering the spiral heat exchange tube 12, improving the flow-dividing effect of the fluid, reducing the local impact of the fluid on the heat exchange tube, and extending the service life of the heat exchange tube.

[0028] like Figure 2 and Figure 4As shown, the heat dissipation mechanism includes several heat dissipation fins 16, which are evenly arranged on the side wall of the phase change material container 11. The phase change material container 11 is tightly attached to the outer wall of the spiral heat exchange tube 12 and is fixedly connected to it by a high-efficiency thermally conductive adhesive. Through the above structure, the uniform distribution of the heat dissipation fins 16 significantly increases the heat dissipation area of ​​the phase change material container 11, accelerates the heat exchange rate between the phase change material and the surrounding environment, and enables the phase change material to undergo phase change more quickly when absorbing heat, thereby improving the heat storage efficiency. When releasing heat, it can also transfer heat to the fluid more quickly, thereby enhancing the heat release effect.

[0029] like Figure 2 As shown, three phase change material containers 11 are distributed on the outer side of the spiral heat exchange tube 12, and the included angle between the phase change material containers 11 is 120 degrees. Through the above structure, this arrangement makes the phase change material containers 11 more evenly distributed in the shell 1, increases the contact area between the phase change material and the spiral heat exchange tube 12, improves the uniformity and efficiency of heat transfer, and avoids the problem of local heat accumulation or insufficient heat exchange.

[0030] like Figure 1 As shown, the lower end of the water outlet tank 10 is connected to the water outlet pipe 7, and the water outlet pipe 7 is equipped with a water outlet valve 8. During operation, turning the water outlet valve 8 allows the fluid to be discharged through the water outlet pipe 7, and turning the water outlet valve 8 in the opposite direction allows the fluid to be suppressed in the water outlet pipe 7. With the above structure, it is easy to control the discharge volume and discharge speed of the fluid after heat exchange, and the outflow of the fluid can be flexibly adjusted according to the actual heat demand, thereby improving the flexibility and adaptability of the heat exchanger.

[0031] like Figure 1 As shown, three fixing columns 5 are fixedly connected to the lower end of the shell 1, and each fixing column 5 is fixedly connected to an anti-slip pad 6. Through the above structure, the fixing columns 5 improve the placement stability of the heat exchanger, and the anti-slip pad 6 increases the friction with the ground, preventing the equipment from shifting due to vibration or fluid impact during operation, ensuring that the heat exchanger can operate safely and stably. At the same time, to facilitate the movement of the device, the anti-slip pad 6 can be replaced with self-locking universal wheels, which improves the mobility and flexibility of the device, and makes it easier to realize waste heat utilization and heat transfer utilization, making the device more convenient to use.

[0032] like Figure 1 As shown, an insulation cover 17 is connected to the outside of the housing 1 by bolts 18. Through the above structure, the insulation cover 17 is a special outer shell structure for equipment insulation, usually made of insulation material combined with a metal shell or other protective materials. It can completely wrap the housing 1 to form a relatively closed insulation space, isolate the cold and heat effects of the external environment, and effectively reduce heat loss.

[0033] Working principle: High-temperature fluid flows into water tank 2 through inlet pipe 3 and inlet 9. Inlet valve 4 controls the flow rate. Inside water tank 2, guide frustum 14 distributes the fluid to three branch ports 13. The fluid then enters spiral heat exchange tube 12. Since spiral heat exchange tube 12 is S-shaped, it prolongs the fluid flow path and increases the contact time with the tube wall, causing the fluid to form turbulence, enhancing the convective heat transfer coefficient, and transferring heat to the phase change material in phase change material container 11, causing it to undergo phase change (such as solid to liquid), thus achieving efficient heat storage.

[0034] The heat dissipation fins 16 on the outer wall of the phase change material container 11 are tightly fitted with the spiral heat exchange tube 12 to accelerate heat exchange. The heat insulation layer 15 on the inner wall of the shell 1 reduces heat loss and improves energy utilization efficiency. The temperature of the fluid after heat exchange decreases and flows along the spiral heat exchange tube 12 to the outlet tank 10, and is discharged through the outlet pipe 7. The outlet valve 8 controls the discharge volume. The phase change material releases heat when the temperature decreases and undergoes a reverse phase change (such as liquid to solid), providing a continuous heat source for the system. At the same time, to facilitate the movement of the device, the anti-slip pad 6 can be replaced with a self-locking universal wheel, which improves the mobility and flexibility of the device. It can also more easily realize the utilization of waste heat and heat transfer, making the use of the device more convenient.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A phase change heat transformer characterized by: The system includes a shell (1), with a frustum-shaped water inlet tank (2) fixedly connected to the upper end of the shell (1). The frustum-shaped water inlet tank (2) has three branch ports (13) inside, and each branch port (13) is connected to a spiral heat exchange tube (12) at its lower end. The frustum-shaped water inlet tank (2) has twelve phase change material containers (11) fixedly connected to its lower end. Each phase change material container (11) contains a phase change material. The frustum-shaped water inlet tank (2) is equipped with a branch port for water distribution. The flow distribution mechanism has a water outlet tank (10) fixedly connected to the bottom of the shell (1), the spiral heat exchange tube (12) is connected to the water outlet tank (10), the phase change material container (11) is equipped with a heat dissipation mechanism for dissipating heat from the inside of the phase change material container (11), the upper end of the frustum water inlet tank (2) is provided with a water inlet (9), the water inlet (9) is connected to a water inlet pipe (3), and the side wall of the water inlet pipe (3) is provided with a water inlet valve (4).

2. A phase change heat transformer according to claim 1, characterised in that: The inner wall of the shell (1) is provided with a heat insulation layer (15), which is firmly attached to the inner wall of the shell (1) by an adhesive.

3. A phase change heat transformer according to claim 1, wherein: The diversion mechanism includes a flow guiding truncated cone (14), which is fixedly installed at the bottom of the inner end of the truncated cone water inlet tank (2) and is located directly below the water inlet (9).

4. A phase change heat transformer according to claim 1, wherein: The heat dissipation mechanism includes several heat dissipation fins (16), which are evenly arranged on the side wall of the phase change material container (11). The phase change material container (11) is tightly attached to the outer wall of the spiral heat exchange tube (12) and fixedly connected to it by a high-efficiency thermally conductive adhesive.

5. A phase change heat transformer according to claim 1, wherein: Three phase change material containers (11) are distributed on the outer side of the spiral heat exchange tube (12), and the included angle between the phase change material containers (11) is 120 degrees.

6. A phase change heat transformer according to claim 1, wherein: The lower end of the water outlet tank (10) is connected to a water outlet pipe (7), and a water outlet valve (8) is provided on the water outlet pipe (7).

7. A phase change heat transformer according to claim 1, wherein: The lower end of the housing (1) is fixedly connected to three fixed posts (5), and each fixed post (5) is fixedly connected to an anti-slip pad (6).

8. A phase change heat transformer according to claim 1, wherein: An insulation cover (17) is connected to the outside of the shell (1) by bolts (18).

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