CN203352458U - Photovoltaic inverter cabinet utilizing heat pipe self-cooling radiation - Google Patents

Abstract

The utility model provides a photovoltaic inverter cabinet utilizing heat pipe self-cooling radiation. The inverter cabinet comprises a cabinet body. An inversion power assembly is arranged at the upper part inside the cabinet body. A capacitive bus unit, a grid-connection isolation transformer and a grid-connection switch are arranged below the inversion power assembly. The cabinet body of the inverter cabinet is provided with an air inlet at the upper part and an air outlet at the lower part. The inverter cabinet is characterized in that a heat radiation opening is disposed on the top of the cabinet body; a heat pipe radiator is located above the inversion power assembly; a radiation fin part of the heat pipe radiator protrudes out of the cabinet through the heat radiation opening on the top of the cabinet body; and a waterproof rain cover is fixedly arranged at the top of the protruded part of the heat pipe radiator. According to the utility model, fans are eliminated, so that the inverter cabinet is free from maintenance, and the cost is reduced; the heat pipe radiator is mounted on the top of the inverter cabinet, and the heat can be discharged to the external of the cabinet body based on the working principles of the heat pipe, thereby achieving self-cooling heat radiation with high speed and good effects; besides, a relatively high IP level inside the cabinet is kept.

Description

Heat pipe self-cooling photovoltaic inverter cabinet

technical field

The utility model belongs to the field of photovoltaic power generation, and relates to a structural design of a box-type inverter station, in particular to a box-type inverter station structure that uses a heat pipe self-cooling and heat dissipation method for heat dissipation. the

Background technique

An inverter is a power adjustment device composed of semiconductor devices, which is mainly used to convert DC power into AC power. It is generally composed of a boost circuit and an inverter bridge circuit. The boost circuit boosts the DC voltage of the solar battery to the DC voltage required for inverter output control; the inverter bridge circuit converts the boosted DC voltage into an AC voltage of common frequency equivalently. Generally, the inverter is arranged in a cabinet shape, and various inverter components are installed in the cabinet, and then air inlets and outlets are opened on the cabinet, and the heat source of the inverter cabinet is the power component IGBT power device in the cabinet. , the layout of the traditional inverter cabinet is shown in Figure 1: a high-speed fan 2 is installed at the entrance of the cabinet, and the radiator assembly is arranged on the high-speed fan. It is sent to the lower part of the inverter cabinet, forced into the power components of the inverter cabinet, and then released from the air outlet on the upper part of the cabinet, so that the air duct needs to pass through the cabinet, and then transfer the heat to the outside of the cabinet. The disadvantage of this kind of cabinet structure design is that the air duct needs to be closely matched, and the upper power components are affected by the lower power components. In the same plane, the temperature of the upper components must be higher than the temperature of the lower power components. On the other hand, dust passing through the cabinet will bring a lot of dust. If it is not cleaned in time, it will definitely affect the components in the cabinet. the

Contents of the invention

The utility model mainly aims at the deficiencies of the prior art to provide an inverter cabinet which adopts the self-cooling and heat dissipation method of the heat pipe to dissipate heat. The heat in the inverter is dissipated to the outside of the inverter station box to achieve self-cooling and heat dissipation. the

The technical solution provided by the utility model: the heat pipe self-cooling and heat dissipation photovoltaic inverter cabinet includes a cabinet body, an inverter power assembly is arranged above the cabinet body, and a capacitor bus unit is arranged below the inverter power assembly. The grid-connected isolation transformer and the grid-connected switch have an air inlet at the bottom of the inverter cabinet and an air outlet at the top. A heat pipe radiator is arranged above, and the heat dissipation fin part of the heat pipe radiator extends out of the cabinet from the heat dissipation port on the top of the cabinet body, and a waterproof rain shield is fixedly installed on the top of the heat pipe radiator extension part. the

There are multiple air outlets, which are respectively set on the side surfaces of the upper part of the cabinet body. the

The utility model cancels the fan, realizes maintenance-free and reduces costs, and installs a heat pipe radiator on the top of the inverter cabinet. When the power components in the inverter cabinet are working, the heat is discharged from the outside of the cabinet through the working principle of the heat pipe, thereby achieving self-efficiency. Cooling and heat dissipation, the heat dissipation is fast and the heat dissipation effect is good. Since the traditional heat sink does not rely on the fan to exhaust the air during the heat extraction process, the cabinet can maintain a high IP level; and the top of the heat sink is equipped with The rainproof waterproof cover will not make the radiator exposed outside be damaged by rainwater. the

Description of drawings

Figure 1 is a schematic structural diagram of a traditional photovoltaic inverter cabinet;

Fig. 2 is the structural representation of the utility model;

Fig. 3 is a schematic diagram of the direction of the natural air convection of the utility model. the

In the figure: 1—cabinet, 2—high-speed fan, 3—grid-connected isolation transformer, 4—capacitor bus unit, 5—grid-connected switch, 6—inverter power component, 7—heat pipe radiator, 8—waterproof and rainproof Cover, 9—air inlet, 10—air outlet. the

Detailed ways

The technical solutions in the utility model will be clearly and completely described below in conjunction with the accompanying drawings. As shown in Figure 2, the heat pipe self-cooling and heat dissipation photovoltaic inverter cabinet includes a cabinet body 1, an inverter power assembly 6 is arranged above the cabinet body, and a capacitor bus unit 4 is arranged below the inverter power assembly , grid-connected isolation transformer 3, grid-connected switch 5, an air inlet 9 is opened at the bottom of the inverter cabinet, and an air outlet 10 is opened at the top. A heat pipe radiator 7 is arranged above the variable power assembly 6, and the cooling fin part of the heat pipe radiator 7 extends out of the cabinet body 1 from the cooling opening on the top of the cabinet body, and is fixedly installed on the top of the extended part of the heat pipe radiator 7. Waterproof rain cover8. The air outlet 10 is provided with a plurality of them, which are opened on the upper side of the cabinet body 1 respectively. the

The air inlet of the inverter cabinet is arranged at the lower part of the cabinet body, and when the cold air passes through the inverter power assembly 6, the hot air is discharged through the air outlet by natural convection. the

The power components in the inverter cabinet generate a lot of heat during operation (Figure 3), and the heat pipe radiator 7 above the inverter power component 6 obtains this heat, and conducts it to the upper part of the heat pipe through the working medium inside the heat pipe, and the heat pipe quickly heats through it. The function of exchange is to transfer the heat to the heat dissipation fins exposing the inverter cabinet body, and then the heat dissipation fins will throw out the conducted heat. Since the outside of the cabinet belongs to an open space, the heat is directly discharged from the top, and the inside of the cabinet is due to the load. It will automatically suck in external air from the air inlet 9 at the bottom of the inverter cabinet to form a natural wind circulation, thereby achieving the self-cooling and heat dissipation mode of the heat pipe. the

Claims (2)

1. a heat pipe self-cold radiating formula photovoltaic inverter cabinet, comprise cabinet (1), be provided with inverter power assembly (6) above in cabinet, arranged beneath at the inverter power assembly has electric capacity bus unit (4), grid-connected isolating transformer (3), grid-connected switch (5), offer air inlet (9) below the inverter cabinet cabinet, top is provided with air outlet (10), it is characterized in that: at inverter cabinet cabinet (1) top, offer thermovent, be provided with heat-pipe radiator (7) in the top of inverter power assembly (6), the radiating fin part of heat-pipe radiator (7) is stretched out cabinet (1) from the thermovent at cabinet top, and the top at heat-pipe radiator (7) extension is fixed with waterproof rain cover (8).

2. heat pipe self-cold radiating formula photovoltaic inverter cabinet according to claim 1, it is characterized in that: described air outlet (10) is provided with a plurality of, is opened in respectively the side on cabinet (1) top.

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