Water-cooling heat exchanger of photovoltaic high-voltage grid-connected cabinet

Abstract

The utility model relates to the technical field of photovoltaic power generation system cooling, in particular to a photovoltaic high-voltage grid-connected cabinet water-cooling heat exchanger which comprises a heat exchange device and a plurality of water-cooling plates arranged at the heat dissipation position of a photovoltaic high-voltage grid-connected cabinet. The heat exchange device comprises a main frame body; a water inlet tank and a water outlet tank are sequentially arranged on the main frame body; a plurality of heat exchange tubes which are arranged at equal intervals are communicated between the water inlet tank and the water outlet tank; the main frame body is further provided with a plurality of sets of heat dissipation fins which are arranged at equal intervals and make contact with the heat exchange pipes. The system adopts a water-cooling circulation mechanism, and realizes effective transfer and dissipation of heat through a heat exchange device consisting of a water inlet tank, a heat exchange tube, heat dissipation fins, a water outlet tank and the like. The water-cooling liquid flows in the heat exchange tubes, absorbs heat generated by the photovoltaic high-voltage grid-connected cabinet, carries the heat to the water outlet tank through circular flow, and finally dissipates the heat to the environment. The circulation mode obviously improves the heat dissipation efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of cooling of photovoltaic power generation systems, and particularly relates to a water-cooled heat exchanger for a photovoltaic high-voltage grid connection cabinet. Background Technique

[0002] In a photovoltaic power generation system, a photovoltaic high-voltage grid connection cabinet is a key power conversion and distribution device, and its stable operation is crucial for the power generation efficiency and safety of the entire photovoltaic power station. However, with the continuous expansion of the scale of photovoltaic power stations and the improvement of power generation efficiency, a large amount of heat is generated during the operation of the photovoltaic high-voltage grid connection cabinet. If the heat cannot be dissipated in a timely and effective manner, it will cause the equipment to overheat, thereby affecting its performance and lifespan, and even leading to safety accidents.

[0003] Traditional heat dissipation methods, such as natural air cooling or simple forced air cooling, often struggle to meet the heat dissipation requirements of high-power density photovoltaic high-voltage grid connection cabinets. Therefore, it is particularly important to develop an efficient and reliable water-cooled heat dissipation system. The water-cooled heat exchanger, with its high heat transfer capacity and stable operating performance, becomes an ideal choice for solving the heat dissipation problem of photovoltaic high-voltage grid connection cabinets. Summary of the Utility Model

[0004] The utility model aims at the technical problems existing in the prior art, and provides a water-cooled heat exchanger for a photovoltaic high-voltage grid connection cabinet to solve the problem of poor heat dissipation efficiency of the above-mentioned high-voltage grid connection cabinet.

[0005] The technical solution for the utility model to solve the above technical problems is as follows: A water-cooled heat exchanger for a photovoltaic high-voltage grid connection cabinet includes a heat exchange device and a plurality of water-cooled plates arranged at the heat dissipation positions of the photovoltaic high-voltage grid connection cabinet;

[0006] The heat exchange device includes a main frame body; an inlet water tank and an outlet water tank are successively installed on the main frame body; a plurality of heat exchange tubes arranged at equal intervals are communicated between the inlet water tank and the outlet water tank; a plurality of groups of heat dissipation fins arranged at equal intervals and in contact with the heat exchange tubes are also installed on the main frame body;

[0007] An annular water-cooled liquid delivery channel is opened in the water-cooled plate, and the inlet and outlet of the water-cooled liquid delivery channel are respectively connected to the inlet water tank and the outlet water tank through pipelines to form a loop.

[0008] Based on the above technical solution, the utility model can be further improved as follows.

[0009] Further, a plurality of fan groups facing the heat dissipation surface of the heat dissipation fins are also installed on the main frame body.

[0010] Further, the fan group is assembled by blades, a drive shaft and a motor drive member.

[0011] Further, a wind guide cover is also arranged along the periphery of the wind direction of the fan group.

[0012] Furthermore, a spray box is installed on the main frame above the heat dissipation fins, and a number of nozzles are installed below the spray box and are arranged facing the heat dissipation fins.

[0013] Furthermore, a heat conduction pad is filled at the contact surface between the water-cooled plate and the photovoltaic high-voltage grid connection cabinet.

[0014] Furthermore, a transfer pump is also provided on the pipeline of the water outlet tank and the water-cooling liquid transfer channel.

[0015] Moreover, the photovoltaic high-voltage grid connection cabinet water-cooled heat exchanger provided by the present utility model has at least the following beneficial effects compared with the prior art:

[0016] 1. The system adopts a water-cooled circulation mechanism. Through the heat exchange device composed of a water inlet tank, heat exchange tubes, heat dissipation fins, and a water outlet tank, effective heat transfer and dissipation are achieved. The water-cooling liquid flows in the heat exchange tubes, absorbs the heat generated by the photovoltaic high-voltage grid connection cabinet, and brings the heat to the water outlet tank through cyclic flow, and finally dissipates it into the environment. This cyclic method significantly improves the heat dissipation efficiency.

[0017] 2. On the basis of the heat exchange device, a fan group and a wind guide cover are added to provide an additional air-cooling effect for the heat dissipation fins. The directional air flow generated by the fan group directly blows towards the heat dissipation fins, accelerating the air flow around the heat dissipation fins and improving the heat exchange rate. At the same time, the optimized design of the wind guide cover ensures the concentration and efficient utilization of the air flow, further enhancing the heat dissipation effect.

[0018] 3. A spray cooling system composed of a spray box and nozzles is also introduced. By spraying the cooling liquid on the heat dissipation fins, the temperature of the heat dissipation fins is rapidly reduced using the principle of evaporation heat absorption, and a water film is formed on its surface to increase the heat exchange area. This spray cooling technology not only enhances the heat dissipation effect but also improves the flexibility and adaptability of the system. Description of the Drawings

[0019] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0020] Figure 2 is a schematic diagram of the structure of the heat exchange device of the present utility model;

[0021] Figure 3 is a schematic diagram of the structure of the heat exchange device of the present utility model from another perspective.

[0022] In the drawings, the list of components represented by each reference numeral is as follows:

[0023] 1. Main frame; 2. Water inlet tank; 3. Water outlet tank; 4. Heat exchange tubes; 5. Heat dissipation fins; 6. Fan group; 7. Wind guide cover; 8. Spray box; 8.1. Nozzle; 100. Water-cooled plate. Detailed implementation mode

[0024] The principles and features of the present utility model will be described below in conjunction with the accompanying drawings. The examples given are only used to explain the present utility model and are not intended to limit the scope of the present utility model.

[0025] It should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection" and "connection" in the terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrally formed structure. For those of ordinary skill in the art, the specific meanings of such terms in this patent can be understood according to specific circumstances.

[0026] As Figure 1 、 Figure 2 and Figure 3 shown, the water-cooled heat exchanger of the photovoltaic high-voltage grid-connected cabinet of the present utility model design includes a heat exchange device and a plurality of water-cooled plates 100 arranged at the heat dissipation positions of the photovoltaic high-voltage grid-connected cabinet;

[0027] The heat exchange device includes a main frame 1; a water inlet tank 2 and a water outlet tank 3 are successively installed on the main frame 1; a plurality of heat exchange tubes 4 arranged at equal distances are connected between the water inlet tank 2 and the water outlet tank 3; a plurality of groups of heat dissipation fins 5 arranged at equal distances and in contact with the heat exchange tubes 4 are also installed on the main frame 1;

[0028] An annular water-cooled liquid conveying channel is opened in the water-cooled plate 100, and the inlet and outlet of the water-cooled liquid conveying channel are respectively connected to the water inlet tank 2 and the water outlet tank 3 through pipelines to form a loop.

[0029] The system realizes the transfer and dissipation of heat through the circulation of the water-cooled liquid. The water-cooled liquid enters from the water inlet tank 2 and flows through a plurality of heat exchange tubes 4 arranged at equal distances. These heat exchange tubes are located on the main frame 1 and are in close contact with the heat dissipation fins 5. In the heat exchange tubes, the water-cooled liquid absorbs the heat from the inside of the photovoltaic high-voltage grid-connected cabinet or the heat dissipation fins, and then flows through the pipeline to the water outlet tank 3 to complete a cycle.

[0030] The water-cooled liquid flowing in the heat exchange tubes takes away the heat generated by the photovoltaic high-voltage grid-connected cabinet through direct contact with the heat dissipation fins 5. The design of the heat dissipation fins increases the heat exchange area and improves the heat transfer efficiency, enabling the heat to be transferred to the water-cooled liquid more quickly.

[0031] An annular water-cooled liquid conveying channel is provided in the water-cooled plate 100 arranged at the heat dissipation position of the photovoltaic high-voltage grid-connected cabinet. These water-cooled plates are directly attached to or close to the components that need to be cooled. Through the flow of the water-cooled liquid in the conveying channel, the heat is conducted from the key components of the photovoltaic high-voltage grid-connected cabinet to the water-cooled liquid. The inlet and outlet of the water-cooled liquid are respectively connected to the water inlet tank 2 and the water outlet tank 3 to form a closed circulation loop, ensuring the continuous transfer and dissipation of heat.

[0032] Through the above-mentioned water cooling cycle and heat exchange mechanism, the heat generated inside the photovoltaic high-voltage grid-connected cabinet is effectively transferred to the water-cooling liquid, and through the circulation of the water-cooling liquid, the heat is finally dissipated into the environment. This design significantly improves the heat dissipation efficiency of the photovoltaic high-voltage grid-connected cabinet and ensures the stability and reliability of the equipment under long-term high-load operation.

[0033] As an implementation mode, the main frame 1 is further provided with a plurality of fan units 6 facing the heat dissipation surfaces of the heat dissipation fins 5 .

[0034] Specifically, the fan unit 6 is assembled from blades, a drive shaft and a motor drive component.

[0035] The introduction of the fan unit 6 provides an additional air cooling effect for the heat dissipation fins 5. The fan unit is assembled from blades, a drive shaft and a motor drive. When the motor drive is started, the drive shaft drives the blades to rotate, generating directional airflow. These airflows are directly blown to the heat dissipation surface of the heat dissipation fins 5, accelerating the flow of air around the heat dissipation fins, thereby increasing the heat exchange rate, so that the heat on the heat dissipation fins can be dissipated into the air faster.

[0036] Specifically, an air guide hood 7 is further provided along the wind direction periphery of the fan unit 6, and the air guide hood 7 provided along the wind direction periphery of the fan unit 6 plays a role in optimizing the wind flow. The air guide hood can guide the airflow generated by the fan to flow in a specific direction, reduce the turbulence and loss of the airflow, and ensure that the airflow can directly and efficiently act on the heat dissipation fins 5. At the same time, the air guide hood can also reduce the influence of the external environment on the wind flow to a certain extent, and improve the stability and efficiency of the heat dissipation system.

[0037] As an implementation mode, a spray box 8 located above the heat dissipation fins 5 is further installed on the main frame 1, and a plurality of spray heads 8.1 facing the heat dissipation fins 5 are installed below the spray box 8.

[0038] The spray box 8 stores cooling water or other suitable coolant. When needed, the spray system is activated through the control system, so that the coolant is sprayed from the nozzle 8.1 below the spray box 8 and directly sprayed on the heat sink fins 5. The coolant evaporates quickly after contacting the high-temperature heat sink fins. This evaporation process absorbs a large amount of heat, thereby effectively reducing the temperature of the heat sink fins.

[0039] Spray cooling not only reduces the temperature of the heat sink fins by evaporating heat, but also forms a thin layer of water film on the surface of the heat sink fins. This layer of water film can increase the contact area between the heat sink fins and the surrounding air, improving the heat exchange efficiency. At the same time, the water in the water film will also take away some heat during the evaporation process, further accelerating the heat dissipation.

[0040] As an implementation manner, a heat conduction pad is filled at the contact surface between the water cooling plate 100 and the photovoltaic high-voltage grid-connected cabinet. The heat conduction pad is filled between the contact surfaces of the water cooling plate 100 and the photovoltaic high-voltage grid-connected cabinet. Its main function is to fill the tiny gaps between the two, ensure the close fit of the contact surfaces, and reduce the thermal resistance. The heat conduction pad is usually made of high thermal conductivity materials, which can quickly conduct the heat generated inside the photovoltaic high-voltage grid-connected cabinet to the water cooling plate, so that the heat can be more effectively absorbed and carried away by the water cooling liquid.

[0041] A delivery pump is also provided on the pipeline of the water outlet tank 3 and the water cooling liquid delivery channel. The delivery pump is provided on the pipeline of the water outlet tank 3 and the water cooling liquid delivery channel. Its main function is to provide power to push the water cooling liquid to circulate between the heat exchange device and the water cooling plate. The delivery pump can ensure that the water cooling liquid passes through the heat exchange tube 4 and the delivery channel inside the water cooling plate at a certain flow rate and flow volume, so that the heat can be continuously and efficiently transferred and dissipated. By adjusting the power and flow volume of the delivery pump, the circulation speed and heat dissipation effect of the water cooling liquid can be controlled to meet the heat dissipation requirements under different working conditions.

[0042] It should be noted that in this article, the terms "including", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. Unless otherwise clearly stipulated and defined, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0043] Although the preferred embodiments of the present invention have been described, those skilled in the art can make additional changes and modifications once they know the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present invention.

[0044] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims

1. A water-cooled heat exchanger for a photovoltaic high-voltage grid-connected cabinet, characterized in that, It includes a heat exchange device and a number of water-cooled plates (100) arranged at the heat dissipation positions of the photovoltaic high-voltage grid connection cabinet; The heat exchange device includes a main frame body (1); an inlet water tank (2) and an outlet water tank (3) are successively installed on the main frame body (1); a plurality of heat exchange tubes (4) arranged at equal intervals are connected between the inlet water tank (2) and the outlet water tank (3); a plurality of groups of heat dissipation fins (5) arranged at equal intervals and in contact with the heat exchange tubes (4) are also installed on the main frame body (1); An annular water-cooling liquid conveying channel is formed in the water-cooled plate (100), and the inlet and outlet of the water-cooling liquid conveying channel are respectively connected to the inlet water tank (2) and the outlet water tank (3) through pipelines to form a loop.

2. The water-cooled heat exchanger of the photovoltaic high-voltage grid-connected cabinet according to claim 1, characterized in that, A number of fan groups (6) facing the heat dissipation surface of the heat dissipation fins (5) are also installed on the main frame body (1).

3. The water-cooled heat exchanger of the photovoltaic high-voltage grid-connected cabinet according to claim 2, characterized in that, The fan group (6) is assembled by blades, a driving shaft and a motor driving part.

4. The water-cooled heat exchanger of the photovoltaic high-voltage grid-connected cabinet according to claim 2, wherein A wind guide cover (7) is also arranged along the outer periphery of the wind direction of the fan group (6).

5. The water-cooled heat exchanger of the photovoltaic high-voltage grid-connected cabinet according to claim 1, characterized in that, A spray box (8) located above the heat dissipation fins (5) is also installed on the main frame body (1), and a number of nozzles (8.1) facing the heat dissipation fins (5) are installed below the spray box (8).

6. The water-cooled heat exchanger of the photovoltaic high-voltage grid-connected cabinet according to claim 1, characterized in that, A heat conduction pad is filled at the contact surface between the water-cooled plate (100) and the photovoltaic high-voltage grid connection cabinet.

7. The water-cooled heat exchanger of the photovoltaic high-voltage grid-connected cabinet according to any one of claims 1-6, characterized in that A delivery pump is also arranged on the pipeline of the outlet water tank (3) and the water-cooling liquid conveying channel.

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