Efficient photovoltaic high-voltage grid-connected cabinet water cooling system

Abstract

The utility model relates to the technical field of photovoltaic power generation system water cooling, in particular to a high-efficiency photovoltaic high-voltage grid-connected cabinet water cooling system, which comprises a heat exchanger, a plurality of electrical water cooling plates arranged at heat dissipation positions of photovoltaic high-voltage grid-connected cabinets, and a heat exchange pipeline used for connecting the electrical water cooling plates in parallel. A water inlet pipeline and a water return pipeline are arranged between the heat exchanger and the heat exchange pipeline to form a loop; a cooling water pumping device and a water inlet control valve are arranged on the water inlet pipeline; and a water outlet control valve is arranged on the water return pipeline. By adopting the water cooling technology, the system is tightly attached to the heat dissipation surface of the photovoltaic high-voltage grid-connected cabinet through the electric water cooling plate, heat generated by equipment is directly absorbed, and the heat is rapidly taken away through cooling water circulation. According to the design, the heat dissipation efficiency is remarkably improved, and the operation temperature of the equipment is effectively reduced, so that the service life of the equipment is prolonged, and equipment damage or performance reduction caused by overheating is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of water cooling for photovoltaic power generation systems, and specifically to a high-efficiency water cooling system for a photovoltaic high-voltage grid connection cabinet. Background Art

[0002] With the growing global demand for renewable energy, photovoltaic power generation, as a clean and renewable energy form, has been increasingly widely applied. The photovoltaic high-voltage grid connection cabinet, as a key device in the photovoltaic power generation system, is responsible for converting the direct current generated by the photovoltaic array into alternating current and safely connecting it to the power grid. However, during the conversion process, a large amount of heat is generated inside the high-voltage grid connection cabinet. If this heat cannot be dissipated in a timely and effective manner, it will cause the temperature of the device to rise, thereby leading to a decline in device performance, a shortening of the service life, and even potential system failures and safety hazards.

[0003] Traditional heat dissipation methods, such as natural air cooling or simple fan cooling, often struggle to meet the heat dissipation requirements of the high-voltage grid connection cabinet under high-load operation. Especially in harsh environments such as high temperature and high humidity, the efficiency of these traditional heat dissipation methods is greatly reduced. Therefore, developing an efficient and reliable heat dissipation system is of great significance for ensuring the stable operation of the photovoltaic high-voltage grid connection cabinet. Summary of the Utility Model

[0004] In view of the technical problems existing in the prior art, the utility model provides a high-efficiency water cooling system for a photovoltaic high-voltage grid connection cabinet to solve the problem of low 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 high-efficiency water cooling system for a photovoltaic high-voltage grid connection cabinet includes a heat exchanger, a plurality of electrical water cooling plates arranged at the heat dissipation positions of each photovoltaic high-voltage grid connection cabinet, and a heat exchange pipeline for paralleling each electrical water cooling plate; a water inlet pipeline and a water return pipeline are arranged between the heat exchanger and the heat exchange pipeline to form a loop;

[0006] A cooling water pump delivery device and a water inlet control valve are arranged on the water inlet pipeline;

[0007] A water outlet control valve is arranged on the water return pipeline.

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

[0009] Further, the cooling water pump delivery device includes two groups of water pump sets connected in parallel to the water inlet pipeline, and the two groups of water pumps can operate synchronously or independently to control the water delivery volume.

[0010] Further, the water pump set is assembled by a flexible joint and a water pump.

[0011] Furthermore, the water pump group further includes a check valve disposed in front of the water inlet of the water pump.

[0012] Furthermore, control valves are installed at both the water inlet and outlet of the water pump.

[0013] Furthermore, an expansion tank is connected to the inlet pipeline through a pipeline.

[0014] Furthermore, pressure gauges and exhaust valves are provided on both the inlet pipeline and the return pipeline.

[0015] Furthermore, a water filter is provided on the return pipeline.

[0016] Furthermore, it further includes a PLC controller. The signal input end of the PLC controller is connected to a temperature transmitter and a pressure transmitter; the PLC controller adjusts the water flow rate of the heat exchanger and the cooling water pumping device according to the pressure and temperature parameters.

[0017] Moreover, the water-cooling system for the high-efficiency photovoltaic high-voltage grid-connected cabinet provided by the present utility model has at least the following beneficial effects compared with the prior art:

[0018] 1. Using water-cooling technology, the system directly absorbs the heat generated by the equipment by closely attaching the electrical water-cooling plate to the heat dissipation surface of the photovoltaic high-voltage grid-connected cabinet, and quickly takes away the heat through the cooling water circulation. This design significantly improves the heat dissipation efficiency, effectively reduces the operating temperature of the equipment, thereby extending the service life of the equipment and preventing equipment damage or performance degradation caused by overheating.

[0019] 2. Compared with the traditional air-cooling system, the water-cooling system has higher heat dissipation efficiency and lower operating cost, meeting the development trend of energy conservation and environmental protection; the water-cooling system can effectively control the temperature of the equipment, reduce the risk of equipment damage due to overheating, and improve the stability and reliability of the equipment.

[0020] 3. The system is equipped with a PLC controller, which can intelligently adjust the operating state of the cooling water pumping device and the opening degree of the valve according to the actual temperature and load conditions. This intelligent control mechanism ensures that the system can maintain the best heat dissipation effect under different working conditions, improving the adaptability and stability of the system. Description of the Drawings

[0021] Figure 1 is a flow chart of the water-cooling system for the high-efficiency photovoltaic high-voltage grid-connected cabinet of the present utility model;

[0022] Figure 2 is a distribution schematic diagram of the water-cooling system for the grid-connected cabinet applied in the photovoltaic power generation system of the present utility model.

[0023] In the drawings, the list of components represented by each reference numeral is as follows:

[0024] 1. Heat exchanger; 2. Electrical water-cooled plate; 3. Heat exchange pipeline; 4. Cooling water pump delivery device; 4.1 Flexible joint; 4.2 Water pump; 4.3 Check valve; 4.4 Control valve; 5. Expansion tank; 6. Pressure gauge; 7. Exhaust valve; 8. Water filter; 9. PLC controller. Specific implementation manner

[0025] The principles and features of the present utility model will be described below with reference to 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.

[0026] It should be noted that unless otherwise clearly specified and defined, 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.

[0027] As Figure 1 and Figure 2 shown, the water-cooling system of the high-efficiency photovoltaic high-voltage grid-connected cabinet designed by the present utility model includes a heat exchanger 1, a plurality of electrical water-cooled plates 2 arranged at the heat dissipation positions of each photovoltaic high-voltage grid-connected cabinet, and a heat exchange pipeline 3 for paralleling each electrical water-cooled plate 2; a water inlet pipeline and a water return pipeline are arranged between the heat exchanger 1 and the heat exchange pipeline 3 to form a loop;

[0028] A cooling water pump delivery device 4 and a water inlet control valve are arranged on the water inlet pipeline;

[0029] An outlet control valve is arranged on the water return pipeline.

[0030] After the cooling water pump delivery device 4 is started, cooling water is transported to the heat exchanger 1 through the water inlet pipeline for preliminary cooling; the cooled cooling water then enters each electrical water-cooled plate 2. These water-cooled plates are closely attached to the heat dissipation surface of the photovoltaic high-voltage grid-connected cabinet, and the heat generated by the equipment is absorbed into the cooling water through heat conduction; the cooling water that has absorbed the heat then flows back to the heat exchanger 1 through the heat exchange pipeline 3, and heat exchange is carried out with the external environment in the heat exchanger, and the heat is dissipated into the air, thereby realizing the recycling of the cooling water.

[0031] The water inlet control valve and the outlet control valve are respectively installed on the water inlet pipeline and the water return pipeline to adjust the flow rate of the cooling water; by controlling the opening degree of the valve, precise adjustment of the cooling water flow rate can be achieved, so as to meet the heat dissipation requirements under different working conditions.

[0032] At the same time, the control system will intelligently adjust the operating state of the cooling water pump delivery device and the opening degree of the valve according to the actual temperature and load conditions of the photovoltaic high-voltage grid-connected cabinet to ensure that the equipment always maintains within the optimal operating temperature range.

[0033] As an implementation manner, the cooling water pumping device 4 includes two groups of water pump sets that are connected in parallel to the water inlet pipeline, and the two groups of water pumps can operate synchronously or independently to control the water delivery volume.

[0034] The system adjusts the delivery volume of the cooling water by controlling the synchronous or independent operation of the two groups of water pump sets. When the heat dissipation requirement of the equipment is relatively low, only one group of water pump sets can be started to operate; when the heat dissipation requirement is relatively high, both groups of water pump sets are started simultaneously to increase the flow rate of the cooling water and improve the heat dissipation efficiency.

[0035] Specifically, the water pump set is assembled by a flexible joint 4.1 and a water pump 4.2.

[0036] The water pump set further includes a check valve 4.3 disposed in front of the water inlet of the water pump 4.2; control valves 4.4 are installed at both the water inlet and the water outlet of the water pump 4.2. The control valves 4.4 adjust the on-off and flow rate of the water flow according to the control instructions or preset parameters of the system. When it is necessary to increase the flow rate of the cooling water, the control valve can be gradually opened to allow more cooling water to enter the water pump and flow to the radiator; conversely, when it is necessary to reduce the flow rate, the control valve is gradually closed; the check valve 4.3 automatically closes when the water pump stops running, preventing the cooling water from flowing back into the water inlet pipeline and protecting the water pump from damage such as water hammer impact. At the same time, the check valve can also prevent external impurities from entering the interior of the water pump, ensuring the cleanliness and normal operation of the water pump.

[0037] As an implementation manner, an expansion tank 5 is also connected to the water inlet pipeline through a pipeline.

[0038] The expansion tank is pre-filled with gas (such as nitrogen) at a certain pressure. When the system pressure rises, part of the cooling water will be compressed and enter the airbag in the expansion tank, thereby reducing the system pressure; when the system pressure drops, the water in the airbag will be extruded by the gas and replenished into the system to maintain the relative stability of the system pressure.

[0039] As a supplement, pressure gauges 6 and exhaust valves 7 are provided on both the water inlet pipeline and the water return pipeline. Through the readings of the pressure gauges, the operator can understand the operating conditions of the system and promptly discover and handle possible faults. For example, when the system pressure rises or drops abnormally, it may mean that there are problems such as blockage, leakage, or water pump failure in the system, and measures need to be taken promptly to deal with them; the exhaust valve can be opened automatically or manually to discharge the air in the pipeline to ensure the smooth flow of the cooling water.

[0040] As a supplement, a water filter 8 is also provided on the water return pipeline. The interior of the filter is equipped with filtering media, such as filter elements, filter meshes, etc. When the cooling water passes through the filter, impurities and particulate matters will be intercepted by the filtering media and deposited inside the filter.

[0041] As an implementation manner, it further includes a PLC controller 9, and the signal input end of the PLC controller 9 is connected to a temperature transmitter and a pressure transmitter; the PLC controller 9 regulates the water flow rate of the heat exchanger 1 and the cooling water pumping device 4 according to the pressure and temperature parameters.

[0042] The signal input end of the PLC controller is connected to a temperature transmitter and a pressure transmitter. The temperature transmitter is used to monitor the temperature of the photovoltaic high-voltage grid-connected cabinet or other key components in real time, convert the temperature signal into an electrical signal and transmit it to the PLC controller. The pressure transmitter is used to monitor the pressure change in the cooling water system, and also convert the pressure signal into an electrical signal and transmit it to the PLC controller.

[0043] By receiving the signals transmitted by the temperature transmitter and the pressure transmitter, the temperature and pressure parameters of the system are monitored in real time; these parameters are analyzed and judged according to the preset logic program and algorithm; control instructions are sent to the heat exchanger and the cooling water pumping device according to the judgment results to effectively regulate the system temperature and precisely control the cooling water flow rate. This process realizes the intelligent and automatic operation of the system, and improves the stability and reliability of the system.

[0044] It should be noted that in this article, the terms "include", "comprise" or any other variant 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 expressly listed, or further includes elements inherent to such process, method, article or device. Unless otherwise expressly stipulated and defined, the terms "install", "connect", "couple" 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 utility model can be understood according to specific circumstances.

[0045] Although the preferred embodiments of the present utility model have been described, those skilled in the art can make additional changes and modifications once they know the basic inventive concept. Therefore, the appended claims are intended to be construed to include the preferred embodiments as well as all changes and modifications falling within the scope of the present utility model.

[0046] Obviously, those skilled in the art can make various changes and modifications to the present utility model without departing from the spirit and scope of the present utility model. Thus, if these modifications and variations of the present utility model fall within the scope of the claims of the present utility model and their equivalent technologies, the present utility model is also intended to include these modifications and variations.

Claims

1. An efficient water-cooling system for a photovoltaic high-voltage grid-connected cabinet, characterized in that, It includes a heat exchanger (1), a number of electrical water-cooled plates (2) arranged at the heat dissipation positions of each photovoltaic high-voltage grid-connected cabinet, and a heat exchange pipeline (3) for paralleling each electrical water-cooled plate (2); a water inlet pipeline and a water return pipeline are arranged between the heat exchanger (1) and the heat exchange pipeline (3) to form a loop; A cooling water pump delivery device (4) and a water inlet control valve are arranged on the water inlet pipeline; A water outlet control valve is arranged on the water return pipeline.

2. The water cooling system of the high-efficiency photovoltaic high-voltage grid-connected cabinet according to claim 1, characterized in that The cooling water pump delivery device (4) includes two groups of water pump sets connected in parallel to the water inlet pipeline, and the two groups of water pumps can operate synchronously or independently to control the water delivery volume.

3. The water-cooling system of the high-efficiency photovoltaic high-voltage grid-connected cabinet according to claim 2, characterized in that, The water pump set is assembled by a flexible joint (4.1) and a water pump (4.2).

4. The water cooling system of the high-efficiency photovoltaic high-voltage grid-connected cabinet according to claim 3, characterized in that, The water pump set further includes a check valve (4.3) arranged in front of the water inlet of the water pump (4.2).

5. The water cooling system of the high-efficiency photovoltaic high-voltage grid-connected cabinet according to claim 3, wherein, Control valves (4.4) are installed at both the water inlet and the water outlet of the water pump (4.2).

6. The water-cooling system of the high-efficiency photovoltaic high-voltage grid-connected cabinet according to claim 1, wherein An expansion tank (5) is also connected to the water inlet pipeline through a pipeline.

7. The water cooling system of the high-efficiency photovoltaic high-voltage grid-connected cabinet according to claim 1, wherein, Pressure gauges (6) and exhaust valves (7) are arranged on both the water inlet pipeline and the water return pipeline.

8. The water cooling system of the high-efficiency photovoltaic high-voltage grid-connected cabinet according to claim 1, wherein, A water filter (8) is also arranged on the water return pipeline.

9. The water cooling system for the high-efficiency photovoltaic high-voltage grid-connected cabinet according to any one of claims 1-8, characterized in that, It further includes a PLC controller (9), and the signal input end of the PLC controller (9) is connected to a temperature transmitter and a pressure transmitter; the PLC controller (9) adjusts the water flow of the heat exchanger (1) and the cooling water pump delivery device (4) according to the pressure and temperature parameters.

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