Heat dissipation device for dry-type transformer of wind power generator cabin

Abstract

The utility model relates to the technical field of dry-type transformers, in particular to a heat dissipation device for a dry-type transformer of a wind power generator cabin, which is efficient in heat dissipation, capable of preventing dust and purifying and suitable for high temperature. Comprising a heat dissipation box body and a box door connected with the heat dissipation box body in an opening and closing mode. A containing cavity used for containing the dry-type transformer is formed in the heat dissipation box body, and a cold air generation mechanism used for cooling air and an air cooling circulation mechanism used for ventilation of the containing cavity are fixed to the side wall of the heat dissipation box body.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of dry type transformer, in particular to a heat dissipation device for wind driven generator cabin dry type transformer. BACKGROUND

[0002] As a clean and renewable energy technology, wind power occupies an increasingly important position in the global energy structure. The dry type transformer in the wind driven generator cabin plays a key role in voltage conversion and power transmission. If it cannot dissipate heat in time and effectively, the temperature of the transformer will be too high, which will affect its performance, shorten its service life, and even cause failure, thereby affecting the stable operation of the entire wind power system

[0003] The existing heat dissipation device for wind driven generator cabin dry type transformer mostly adopts air cooling or liquid cooling. Air cooling mainly relies on natural convection or forced convection of air to carry away heat. However, in a high temperature environment, the ambient air temperature is relatively high, the heat capacity of air is relatively limited, and the heat that can be carried away is also greatly limited. The liquid cooling method uses cooling liquid circulation to dissipate heat. Although the heat dissipation efficiency is higher than that of air cooling, the temperature of the cooling liquid in the liquid cooling system is prone to rise in a high temperature environment, and the heat exchange efficiency is reduced, thereby making it difficult for these heat dissipation devices to meet the heat dissipation demand in a high temperature environment. SUMMARY

[0004] To solve the above technical problems, the utility model provides a heat dissipation device for wind driven generator cabin dry type transformer, which is efficient in heat dissipation, dustproof and purification, and suitable for high temperature.

[0005] The heat dissipation device for wind driven generator cabin dry type transformer comprises a heat dissipation box body and a box door connected to the heat dissipation box body in an openable and closable manner. The heat dissipation box body is internally provided with a containing cavity for placing the dry type transformer. A cold air generating mechanism for cooling air and an air cooling circulation mechanism for ventilation of the containing cavity are fixed on the side wall of the heat dissipation box body.

[0006] Further, the air cooling circulation mechanism comprises multiple groups of air inlet assemblies and multiple groups of air outlet assemblies. The air inlet assemblies are arranged on the lower part of the side of the heat dissipation box body, and the air outlet assemblies are arranged on the top of the heat dissipation box body.

[0007] Further, the air inlet assembly comprises an air inlet and an air inlet pipeline. The air inlet is formed on the side wall of the heat dissipation box body. The air inlet pipeline is connected to the air inlet, and a wind collecting cover is connected to the air outlet of the air inlet pipeline. An air filtering assembly is arranged in the air inlet pipeline.

[0008] Further, the air filtering assembly comprises a plurality of filtering pieces, which are arranged in sequence along the air flow direction.

[0009] Further, the cold air generating mechanism comprises a condenser set, a compressor set and an evaporator set; the condenser set and the evaporator set form a closed loop with the compressor set through pipelines, and the evaporator set is arranged in the air inlet pipeline, and the condenser set is installed outside the heat dissipation box body; the evaporator set comprises a water collecting bucket and a plurality of evaporators, and the evaporators are arranged in sequence along the air flow direction, and the water collecting bucket is arranged below the evaporators.

[0010] Further, the cold air generating mechanism further comprises a nozzle set, the nozzle set comprises a plurality of nozzles facing the windward surface of the evaporator, the plurality of nozzles are communicated with the water collecting bucket through pipelines, and a water pump and a water filter are arranged on the pipelines.

[0011] Further, the air outlet assembly comprises an air outlet, an air outlet pipeline and an air outlet fan, the air outlet is arranged on the side wall of the heat dissipation box body, the air outlet pipeline is connected with the air outlet, and the air outlet fan is installed in the air outlet pipeline.

[0012] Further, a heat insulation layer is arranged on the heat dissipation box body.

[0013] Compared with the prior art, the utility model has the advantages that:

[0014] Through the cold air generating mechanism, the air entering the containing cavity is cooled, and then the air circulation mechanism is used to realize the circulation flow of the air, so that the working temperature of the transformer can be effectively reduced, the heat dissipation efficiency is improved, and the utility model is especially suitable for high temperature environment. BRIEF DESCRIPTION OF DRAWINGS

[0015] The utility model will be further described below in combination with the drawings.

[0016] Figure 1 It is the structure schematic diagram of the utility model;

[0017] Figure 2 It is the internal structure schematic diagram of the utility model;

[0018] Figure 3 It is the connection structure schematic diagram of the cold air generating mechanism of the utility model;

[0019] Figure 4 It is the connection structure schematic diagram of the evaporator set and the nozzle set of the utility model;

[0020] The attached diagram is labeled as follows: 1. Heat dissipation box; 11. Receiving cavity; 2. Box door; 3. Cold air generation mechanism; 31. Condenser assembly; 32. Compressor assembly; 33. Evaporator assembly; 331. Water collection trough; 332. Evaporator; 34. Nozzle assembly; 341. Nozzle; 342. Water pump; 343. Water filter; 4. Air-cooled circulation mechanism; 41. Air inlet assembly; 411. Air inlet; 412. Air inlet duct; 413. Air collector hood; 414. Air filter assembly; 4141. Filter element; 42. Air outlet assembly; 421. Air outlet; 422. Air outlet duct; 423. Fan. Detailed Implementation

[0021] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0022] like Figures 1 to 2 As shown, the present invention discloses a heat dissipation device for a dry-type transformer in a wind turbine nacelle, comprising a heat dissipation box 1 and a door 2 that can be opened and closed connected to the heat dissipation box 1. In the embodiments of this application, the heat dissipation box 1 is an integral structural frame that provides a closed or semi-closed space for the entire heat dissipation device to accommodate and protect the internal components. It is usually made of a material with a certain strength to prevent excessive interference from the external environment and to protect the safety of the operators. The door 2 is designed to facilitate the inspection, maintenance and repair of the interior of the heat dissipation box 1 by the staff.

[0023] In the embodiments of this application, the heat dissipation box 1 is provided with a receiving cavity 11 for placing the dry-type transformer. A cold air generating mechanism 3 for cooling the air and an air-cooling circulation mechanism 4 for ventilating the receiving cavity 11 are fixed on the side wall of the heat dissipation box 1. Its working principle is based on the heat exchange characteristics of air. The cold air generating mechanism 3 draws in air from the external environment and cools the air to a lower temperature. The air-cooling circulation mechanism 4 introduces the cooled air into the receiving cavity 11 of the heat dissipation box. When the cold air comes into contact with the surface of the dry-type transformer, since the surface temperature of the transformer is higher than the temperature of the cold air, heat will be transferred from the surface of the transformer to the cold air. The heated air temperature rises and the density decreases. Under the action of the air-cooling circulation mechanism 4, the hot air is discharged from the receiving cavity 11, and new cold air will be continuously replenished. This cycle repeats, thereby achieving continuous heat dissipation for the dry-type transformer. Through this design, the air is actively cooled, which is not limited by the external ambient temperature. Even in high-temperature environments, it can still provide low-temperature cooling air, ensuring the stability and reliability of the heat dissipation device and having strong environmental adaptability.

[0024] In some embodiments of the present application, the air cooling circulation mechanism 4 includes multiple sets of air inlet assemblies 41 and multiple sets of air outlet assemblies 42. The air inlet assemblies 41 are arranged at the lower part of the side wall of the heat dissipation box 1, and the air outlet assemblies 42 are arranged at the top of the heat dissipation box 1. When the air cooling circulation mechanism 4 is working, the air inlet assemblies 41 introduce the low-temperature cold air cooled by the cold air generating mechanism 3 into the containing cavity 11 from the lower part of the side wall of the heat dissipation box 1. Due to the large density of the cold air, the cold air rises along the bottom of the heat dissipation box 1 and fully contacts the surface of the dry-type transformer placed above, thereby taking away the heat generated by the transformer. As the temperature of the air rises, the hot air gradually rises and is finally discharged out of the box through the air outlet assemblies 42 located at the top of the heat dissipation box 1, forming an orderly air convection channel and avoiding the occurrence of air short-circuit phenomenon, thereby ensuring the uniform flow of air in the containing cavity and improving the heat dissipation efficiency.

[0025] In some embodiments of the present application, the air inlet assembly 41 includes an air inlet 411 and an air inlet pipeline 412. The air inlet 411 is arranged on the side wall of the heat dissipation box 1, and the air inlet pipeline 412 is connected to the air inlet 411. A wind collecting cover 413 is connected to the air outlet of the air inlet pipeline 412, and an air filtering assembly 414 is arranged in the air inlet pipeline 412. In the embodiments of the present application, the air filtering assembly 414 filters the air to remove impurities and particulate matter. The purified air flows in the air inlet pipeline 412, is concentrated and guided by the wind collecting cover 413, and is introduced into the containing cavity 11 of the heat dissipation box and uniformly distributed around the dry-type transformer. The filtering by the air filtering assembly 414 ensures that the air entering the heat dissipation box 1 is clean, which not only prevents pollutants from accumulating on the surface of the transformer and affecting the heat dissipation effect, but also reduces the safety hazards such as short circuit and electric leakage caused by dust entering the electrical connection part, thereby improving the operation reliability and safety of the equipment.

[0026] As shown in Figure 3 In some embodiments of the present application, the air filtering assembly 414 includes a plurality of filtering elements 4141 arranged in sequence along the air flow direction. In the embodiments of the present application, the filtering elements 4141 are of a detachable structure, which facilitates regular cleaning or replacement by the staff to maintain good filtering effect. Each filtering element 4141 has a specific filtering structure and function, and can effectively intercept and filter particulate matter of different sizes and properties. These filtering elements 4141 can be made of various filtering materials such as filter screens and filter cartridges, and appropriate filtering precision and material can be selected according to actual needs to meet the requirements of air purification.

[0027] As shown in Figure 3 and Figure 4As shown in the drawings, in some embodiments of the present application, the cold air generating mechanism 3 includes a condenser group 31, a compressor group 32 and an evaporator group 33; the condenser group 31 and the evaporator group 33 form a closed loop with the compressor group 32 through pipes, and the evaporator group 33 is arranged in the air inlet pipe 412, and the condenser group 31 is installed on the outside of the heat dissipation box 1; the evaporator group 33 includes a water collecting bucket 331 and a plurality of evaporators 332, each evaporator 332 is arranged in sequence along the air flow direction, and the water collecting bucket 331 is arranged below the evaporators 332; in the embodiments of the present application, the main function of the condenser group 31 is to cool the high-temperature and high-pressure gas generated after the refrigerant absorbs heat in the evaporator group 33 into liquid state, which exchanges heat with the outside air to dissipate the heat in the refrigerant to the outside environment, and the condenser group 31 is usually composed of multiple condenser units to improve the heat dissipation efficiency; the compressor group 32 is used to compress the low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure gas through the compressor, and then deliver it to the condenser group 31 for cooling, so that the refrigerant can continuously circulate in the whole closed loop through the work of the compressor, realizing the continuous refrigeration process; the evaporator group 33 is used to cool the air entering the heat dissipation box, and the air is fully contacted with the evaporator through the sequentially arranged evaporators 332, so as to improve the cooling effect; in the process of air passing through the evaporator 332, the water vapor in the air will condense into water droplets on the surface of the evaporator 332 due to the cold, and the water droplets will flow downward under the action of gravity and finally fall into the water collecting bucket 331 for collection, and the condensed water can be used for other purposes after appropriate treatment, realizing the recycling of water resources.

[0028] As shown in the drawings, Figure 4 As shown in the drawings, in some embodiments of the present application, the cold air generating mechanism 3 further includes a nozzle group 34, the nozzle group 34 includes a plurality of nozzles 341 facing the windward surface of the evaporator 332, the plurality of nozzles 341 are communicated with the water collecting bucket 331 through a pipeline, and a water pump 342 and a water filter 343 are arranged on the pipeline; in the embodiments of the present application, the condensed water collected by the water collecting bucket 331 is reused for water spraying cooling, and this additional cooling mode cooperates with the refrigeration effect of the evaporator 332 itself, further enhancing the refrigeration effect of the cold air generating mechanism 3; at the same time, through the water spraying process, the water flow can wash the surface of the evaporator 332 to remove accumulated dust, dirt and other impurities. Keeping the surface of the evaporator 332 clean helps to improve the heat exchange efficiency and avoid the heat transfer performance decline caused by surface pollution.

[0029] As shown in the drawings, Figure 2As shown, in some embodiments of this application, the air outlet assembly 42 includes an air outlet 421, an air outlet duct 422, and a blower 423. The air outlet 421 is located on the side wall of the heat sink 1, the air outlet duct 422 is connected to the air outlet 421, and the blower 423 is installed inside the air outlet duct 422. In the embodiments of this application, the air outlet 421 is an opening on the heat sink 1 for discharging internal hot air, the air outlet duct 422 is used to guide the hot air discharged from the heat sink 1 to flow in a predetermined direction, and the blower 423 drives the impeller to rotate through a motor, generating a strong airflow thrust to quickly extract the hot air from the heat sink 1 and discharge it to the external environment through the air outlet duct 422. This makes room for subsequent cold air to enter, thereby maintaining the air circulation inside the heat sink 1 and ensuring that the dry-type transformer is always within a suitable operating temperature range.

[0030] In some embodiments of this application, a heat dissipation box 1 is provided with a heat insulation layer; in the embodiments of this application, the heat insulation layer covers the surface of the heat dissipation box 1, forming a continuous isolation layer; the heat insulation layer is usually made of a material with low thermal conductivity, such as heat insulation foam, ceramic fiber, aerogel, etc., which greatly slows down the conduction speed of heat in the heat insulation layer, thereby reducing heat loss or transfer; at the same time, the heat insulation layer can also reduce the influence of convection and radiation heat transfer to a certain extent; for example, some heat insulation materials have special coatings or structures on their surfaces that can reflect some radiant heat, further reducing the heat transfer efficiency.

[0031] The working process of the heat dissipation device for a dry-type transformer in a wind turbine nacelle according to this utility model is as follows:

[0032] First, outside air enters the air intake duct 412 through the air intake port 411 of the air intake component 41 located on the lower side of the heat sink 1. Inside the air intake duct 412, the air first passes through the air filter component 414, where several filter elements 4141 arranged sequentially along the air flow direction filter the air. The filtered air continues to flow inside the air intake duct 412.

[0033] The air in the air inlet duct 412 passes through the evaporator group 33. The condenser group 31, compressor group 32 and evaporator group 33 in the cold air generating mechanism 3 form a closed loop through the pipe. Several evaporators 332 in the evaporator group 33 are arranged in sequence along the air flow direction to cool the passing air and reduce its temperature to become cold air. At the same time, the condensate produced by the evaporator 332 drips into the water collection hopper 331 below.

[0034] When further enhanced cooling effect is needed, the spray head group 34 works, the water in the water collecting hopper 331 is filtered through the water filter 343 under the action of the water spray pump 342, and then is sprayed out through a plurality of spray heads 341 facing the windward surface of the evaporator 332, is sprayed on the evaporator 332, and further enhances the refrigeration effect of the evaporator 332, so that the passing air can be more fully cooled;

[0035] The cooled cold air passes through the air collecting hood 413 connected at the air outlet of the air inlet pipeline 412, enters the containing cavity 11 for placing the dry-type transformer in the heat dissipation box body 1, the air in the containing cavity 11 is heated through heat exchange, enters the air outlet 421, and then enters the air outlet pipeline 422, and the hot air is discharged out of the heat dissipation box body 1 under the action of the air outlet fan 423 in the air outlet pipeline 422, and a first air cooling cycle heat dissipation process is completed.

[0036] The plurality of air inlet assemblies 41 and the plurality of air outlet assemblies 42 of the air cooling circulation mechanism 4 work continuously, the air inlet and outlet circulation is continuously carried out, the cold air generating mechanism 3 continuously operates to cool the entering air, and therefore the continuous heat dissipation of the dry-type transformer is realized.

[0037] The dry-type transformer heat dissipation device of the wind driven generator cabin is provided with the installation mode, the connection mode or the setting mode, and the common mechanical mode can be implemented as long as the beneficial effect can be achieved.

[0038] The preferred embodiments of the utility model are described above, and it should be pointed out that, for ordinary technical personnel in the technical field, a plurality of improvements and modifications can be made without departing from the technical principle of the utility model, and the improvements and modifications should be regarded as the protection range of the utility model.

Claims

1. A heat dissipation device for a dry-type transformer of a wind power generator cabin, comprising a heat dissipation box (1) and a box door (2) which is openably and closably connected with the heat dissipation box (1), characterized in that, The heat dissipation box (1) is internally provided with a containing cavity (11) for placing a dry-type transformer, and a cold air generating mechanism (3) for cooling air and a wind cooling circulation mechanism (4) for ventilation of the containing cavity (11) are fixed on the side wall of the heat dissipation box (1).

2. The heat sink for a dry-type transformer of a wind power generator nacelle according to claim 1, characterized in that, The wind cooling circulation mechanism (4) comprises a plurality of groups of air inlet assemblies (41) and a plurality of groups of air outlet assemblies (42), the air inlet assemblies (41) are arranged at the lower part of the side of the heat dissipation box (1), and the air outlet assemblies (42) are arranged at the top of the heat dissipation box (1).

3. The heat sink for a dry-type transformer of a wind power generator nacelle according to claim 2, characterized in that, The air inlet assembly (41) comprises an air inlet (411) and an air inlet pipeline (412), the air inlet (411) is arranged on the side wall of the heat dissipation box (1), the air inlet pipeline (412) is connected with the air inlet (411), a wind collecting cover (413) is connected to the air outlet of the air inlet pipeline (412), and an air filtering assembly (414) is arranged in the air inlet pipeline (412).

4. The heat sink for a dry-type transformer of a wind power generator nacelle according to claim 3, characterized in that, The air filtering assembly (414) comprises a plurality of filtering pieces (4141), and the filtering pieces (4141) are sequentially arranged along the air flow direction.

5. The heat sink for a dry-type transformer of a wind power generator nacelle according to claim 3, characterized in that, The cold air generating mechanism (3) comprises a condenser group (31), a compressor group (32) and an evaporator group (33); the condenser group (31) and the evaporator group (33) form a closed loop with the compressor group (32) through pipelines, the evaporator group (33) is arranged in the air inlet pipeline (412), and the condenser group (31) is arranged outside the heat dissipation box (1); the evaporator group (33) comprises a water collecting hopper (331) and a plurality of evaporators (332), the evaporators (332) are sequentially arranged along the air flow direction, and the water collecting hopper (331) is arranged below the evaporators (332).

6. The heat sink for a dry-type transformer of a wind power generator nacelle according to claim 5, characterized in that, The cold air generating mechanism (3) further comprises a nozzle group (34), the nozzle group (34) comprises a plurality of nozzles (341) facing the windward surface of the evaporators (332), the nozzles (341) are communicated with the water collecting hopper (331) through pipelines, and a water pump (342) and a water filter (343) are arranged on the pipelines.

7. The heat sink for a dry-type transformer of a wind power generator nacelle according to claim 2, characterized by, The air outlet assembly (42) comprises an air outlet (421), an air outlet pipeline (422) and an air outlet fan (423), the air outlet (421) is arranged on the side wall of the heat dissipation box (1), the air outlet pipeline (422) is connected with the air outlet (421), and the air outlet fan (423) is arranged in the air outlet pipeline (422).

8. The heat sink for a dry-type transformer of a wind power generator nacelle according to claim 1, characterized by, The heat dissipation box (1) is provided with a heat insulation layer.

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