CN106659089A - Heat dissipation device and inverter cabinet provided with same - Google Patents

Abstract

The invention relates to a heat dissipation device and an inverter cabinet with the same. A first air guide device corresponding to a corresponding fan is arranged above or below the radiator, so that the cooling air generated by the fan passes through the first air guide device. When switching between the horizontal direction and the up and down direction. The heat dissipation device is simple in design and easy to implement. The cold air entering the air duct through the air guide device greatly increases the heat dissipation effect, effectively solving the uneven heat dissipation caused by the heat dissipation fan and the conical excessive air duct under the inverter. , The problem of poor effect meets the heat dissipation requirements of the string photovoltaic grid-connected inverter and provides good conditions for the stable operation of the string photovoltaic grid-connected inverter.

Description

A heat dissipation device and an inverter cabinet having the same

technical field

The invention belongs to the technical field of string photovoltaic grid-connected inverter system design, and in particular relates to a heat dissipation device and an inverter cabinet having the same.

Background technique

Radiator is a general term for a series of devices used to conduct and release heat. As we all know, high temperature is an important factor for equipment aging. High temperature will not only lead to unstable operation of equipment, shorten service life, and may even burn some components. The heat that causes high temperature does not come from the outside of the device, but the inside of the device. The function of the radiator is to absorb the heat and then dissipate it to the outside of the device, so that the device can work within a normal temperature range.

In 2015, the National Energy Administration plans to build a new photovoltaic power station with a capacity of 17.8GW. The cumulative installed capacity of photovoltaic power stations in my country ranks first in the world. With the vigorous development of distributed photovoltaics, string photovoltaic grid-connected inverters are used in factory roofs and hilly power stations. The application is more extensive. In the prior art, string-type photovoltaic grid-connected inverters have poor heat dissipation effect and low work efficiency in high-temperature environments, which leads to derating operation of the inverter and seriously affects the operation safety of the substation.

At present, the incoming and outgoing cables of the string photovoltaic grid-connected inverter are connected at the lower part of the inverter, and there is not enough space for cooling air ducts, but if the air ducts are made at the bottom of the string photovoltaic grid-connected inverter The top will reduce the protection level of the inverter itself, and it is also vulnerable to falling foreign objects. In addition, most inverters are installed outdoors and are easily affected by the external temperature. In order to reduce the loss of inverter power generation, it is particularly important to do a good job of heat dissipation for string photovoltaic grid-connected inverters. According to research, the forced air-cooled heat dissipation method is more suitable for the heat dissipation of string photovoltaic grid-connected inverters.

Publication No. CN103533816 provides a cooling device for a high-frequency power supply cabinet. The inverter cooling device has a cooling air duct (main air duct and auxiliary air duct) that guides the wind up and down, and a conical transitional air duct is provided below the inverter. As well as the cooling fan connected to it, since the inlet and outlet cables of the inverter are located under the inverter, there is insufficient space under the inverter, and the cooling fan is large in size and the air outlet is small, so the tapered excessive air duct can only The heat dissipation fan can only work through the narrow opening, resulting in long cooling time of the main air duct, uneven heat dissipation, poor heat dissipation effect, no heat dissipation in the auxiliary air duct, and low working efficiency.

Contents of the invention

The purpose of the present invention is to provide a heat dissipation device and an inverter cabinet with it, which is used to solve the problem of uneven heat dissipation and poor effect caused by heat dissipation fans and conical excessive air ducts arranged under the inverter.

In order to solve the above technical problems, the present invention proposes a heat dissipation device, including the following heat dissipation device solutions:

Solution 1 of the heat dissipation device includes a radiator. The radiator has a cooling air channel for guiding the wind up and down. A first air guide device is provided above or below the radiator to correspond to the corresponding fan. The radiating wind generated by the above-mentioned fan is reversible and guided between the horizontal direction and the up-down direction.

Solution 2 of the cooling device. On the basis of the first solution of the cooling device, the cooling device also includes a second air guiding device corresponding to the first air guiding device. The second air guiding device and the first air guiding device are located On the opposite sides, the second air guiding device is used for reversing and guiding the cooling air generated by the fan corresponding to it between the horizontal direction and the up and down direction.

Heat dissipation device schemes three and four are respectively based on heat dissipation device schemes one and two, and there are two first air guiding devices, and the two first air guiding devices are symmetrically arranged left and right.

Heat dissipation device schemes five and six are respectively based on heat dissipation device schemes three and four, and the air outlets at one end of the two first air guiding devices away from the heat dissipation air duct of the radiator face left and right respectively.

The heat dissipation device scheme 7, on the basis of the heat dissipation device scheme 2, there are two second air guiding devices, and the two second air guiding devices are symmetrically arranged left and right.

In the eighth heat dissipation device scheme, on the basis of the seventh heat dissipation device scheme, the air outlets at the ends of the two second air guiding devices away from the heat dissipation air duct of the radiator face left and right respectively.

In order to solve the above technical problems, the present invention also proposes an inverter cabinet with a heat dissipation device, including the following inverter cabinet solutions:

The inverter cabinet scheme 1 includes a cabinet body, and a heat dissipation device is arranged in the cabinet body. The heat dissipation device includes a radiator. The radiator has a cooling air duct for guiding the wind up and down. The first air guiding device is provided, and the first air guiding device is used for reversing and guiding the cooling air generated by the fan between the horizontal direction and the up and down direction.

Inverter cabinet scheme 2, on the basis of inverter cabinet scheme 1, the heat dissipation device also includes a second air guide device corresponding to the first air guide device, the second air guide device and the first air guide device are located at the On the opposite sides of the radiator, the second air guiding device is used to guide the cooling air generated by the fan corresponding to it between the horizontal direction and the up and down direction.

Inverter cabinet scheme three, on the basis of inverter cabinet scheme two, there are two first air guide devices, and the two first air guide devices are symmetrically arranged left and right; there are two second air guide devices, and the two second air guide devices are The two air guiding devices are symmetrically arranged left and right.

Inverter cabinet scheme 4, on the basis of inverter cabinet scheme 3, the air outlets at one end of the two first air guide devices away from the heat dissipation air duct of the radiator face to the left and right respectively, and the two second air guide devices are far away from The air outlets at one end of the cooling air duct of the radiator face to the left and to the right respectively.

The beneficial effects of the present invention are: the first air guide device corresponding to the corresponding fan is arranged above or below the radiator, so that the cooling air generated by the fan passes through the first air guide device between the horizontal direction and the up and down direction. Perform reversing orientation. The heat dissipation device is simple in design and easy to implement. The cold air entering the air duct through the air guide device greatly increases the heat dissipation effect, effectively solving the uneven heat dissipation caused by the heat dissipation fan and the conical excessive air duct under the inverter. , The problem of poor effect meets the heat dissipation requirements of the string photovoltaic grid-connected inverter and provides good conditions for the stable operation of the string photovoltaic grid-connected inverter.

Description of drawings

Fig. 1 is the schematic diagram of a kind of cooling device of the present invention;

Fig. 2 is a schematic diagram of the heat dissipation fins arranged along the length direction of the heat sink in a heat dissipation device of the present invention.

detailed description

The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

An embodiment of an inverter cabinet with a cooling device of the present invention:

The inverter cabinet as shown in Fig. 1 includes an inverter cabinet body, an inverter and a heat dissipation device are arranged in the cabinet body, the heat dissipation device includes a radiator 5, and an incoming and outgoing cable is arranged on the lower side of the inverter. The heat sink 5 includes a rectangular heat dissipation substrate whose length extends along the left and right directions, whose height extends along the up and down direction, and whose thickness extends along the front and rear directions. The rear surface of the heat dissipation substrate is attached to the side of the inverter. Two heat dissipation fins 9 are arranged at intervals along the left and right directions, and the gaps between adjacent heat dissipation fins form a heat dissipation air duct 8 for guiding the wind up and down.

The heat dissipation device also includes two first air guiding devices arranged on the lower side of the radiator 5 . The two first air guide devices are symmetrically arranged left and right, the first air guide device at the left position is called the left first air guide device 1, and the first air guide device at the right position is called the right first air guide device 2.

Left first air guiding device 1 is away from radiator 5 one end tuyere toward the left, is provided with left blower fan 7 correspondingly, and right first air guiding device 2 is far away from radiator 5 one end air outlet is facing right, is correspondingly provided with right blower fan 6, and its guide The wind principle is as follows: the cold wind blown by the left fan 7 passes through the first left air guide device 1, changes the wind in the horizontal direction from left to right to the wind in the vertical direction, and enters the radiator 5 with the upper and lower air guide and heat dissipation air ducts 8; The wind blown by the right blower fan 6 passes through the right first air guiding device 2, and the wind in the horizontal direction from right to left is changed to the wind in the vertical direction, and enters the radiator 5 with the upper and lower air guiding and cooling air ducts 8.

The advantage of the arrangement of the first air guide device is that the blown air is evenly introduced into the heat dissipation air duct by the fan through the first air guide device. The problem of uneven heat dissipation caused by the heat dissipation fan and the conical excessive air duct under the inverter is solved. It also solves the problem that the air duct is installed above the string photovoltaic grid-connected inverter and affects its own protection level.

In order to prevent the wind passing through the heat dissipation duct from accumulating in the inverter, the wind needs to be led out of the inverter, so the heat dissipation device further includes two second air guiding devices arranged on the upper side of the radiator 5 . The two second air guiding devices are symmetrically arranged left and right, the second air guiding device located on the left is called the second left air guiding device 3, and the first air guiding device located on the right is called the first right air guiding device 4 . The air outlet at one end of the left second air guide device 3 away from the radiator cooling air duct faces left, the cold air radiated by the radiator is discharged through the left second air guide device 3, and the right second air guide device 4 is far away from the side of the radiator cooling air duct One end air outlet is discharged through the right second air guiding device 4 through the cold air that radiator radiates heat to the right. In order to further increase the exhaust effect, a fan can be arranged respectively at the air outlet at one end of the left second air guiding device 3 away from the radiator cooling air duct, and at the one end of the right second air guiding device 4 away from the radiator cooling air duct, so as to speed up the process. The flow of wind speed in the cooling device.

One side of the radiator of the present invention is in close contact with the power device or heating device of the inverter, and the other side is a cooling fin. The exhaust method of cooling fins is adopted, and the exhaust method of arranging cooling fins at intervals along the short side (that is, along the left and right directions) is adopted, as shown in Figure 2.

In the present invention, a heat dissipation air channel for guiding the wind up and down is designed on the side of the radiator, and an air guide device is arranged under the radiator, so that the fan blows the wind into the air from both sides, guides the air into the heat dissipation air channel through the air guide device, and finally flows from the The heat sink is exported above the radiator. The design of the heat sink is simple and easy to implement, and it greatly increases the heat dissipation effect, which meets the heat dissipation requirements of the string photovoltaic grid-connected inverter. Provides good conditions for the stable operation of the device.

In other embodiments of the inverter cabinet, the left first air guide device and the right first air guide device, or the right first air guide device and the right second air guide device may be arranged asymmetrically, that is, the first There can be only one air guide device or the second air guide device; it is also possible to only have the first air guide device without the second air guide device; Fans are installed at the corresponding positions, and the form of the fan guide can be to change the wind from the horizontal direction to the up and down direction, or to change the wind from the up and down direction to the horizontal direction.

Embodiment of a kind of cooling device of the present invention:

It includes a radiator, the radiator has a heat dissipation air channel for guiding the wind up and down, and a first air guiding device is provided above or below the radiator to correspond to the corresponding fan, and the first air guiding device is used to dissipate heat generated by the fan. The wind is redirected between horizontal and up-down directions.

An embodiment of a heat dissipation device of the present invention has been introduced in detail in the above embodiment of an inverter cabinet with a heat dissipation device, and will not be repeated here.

Under the idea given by the present invention, the technical means in the above-mentioned embodiments are transformed, replaced, and modified in ways that are easy for those skilled in the art, and the functions played are basically the same as those of the corresponding technical means in the present invention. 1. The purpose of the invention realized is also basically the same, and the technical solution formed in this way is formed by fine-tuning the above-mentioned embodiments, and this technical solution still falls within the protection scope of the present invention.

Claims (10)

1. a kind of heat abstractor, including radiator, radiator has the heat dissipation wind channel of upper and lower wind-guiding, it is characterised in that radiator Above or below be provided with the first air ducting for being correspondingly arranged with corresponding blower fan, the first air ducting is used for the wind The radiation air that machine is produced carries out in the horizontal direction commutation guiding and above-below direction between.

2. heat abstractor according to claim 1, it is characterised in that heat abstractor also includes corresponding with the first air ducting The second air ducting for arranging, the second air ducting, the first air ducting are located at the opposite sides of the radiator, the second wind-guiding Device is used for the radiation air of the blower fan generation to corresponding setting carries out in the horizontal direction commutation guiding and above-below direction between.

3. heat abstractor according to claim 1 and 2, it is characterised in that the first air ducting has two, and two first are led Wind apparatus are symmetrically arranged.

4. heat abstractor according to claim 3, it is characterised in that radiating of two the first air ductings away from radiator One end air port in air channel is respectively towards a left side and towards the right side.

5. heat abstractor according to claim 2, it is characterised in that the second air ducting has two, two the second wind-guidings Device is symmetrically arranged.

6. heat abstractor according to claim 5, it is characterised in that two the second air ductings are away from radiator heat-dissipation wind One end air port in road is respectively towards a left side and towards the right side.

7. a kind of inverter cabinet with heat abstractor, including cabinet, is provided with heat abstractor in cabinet, the heat abstractor includes Radiator, radiator has the heat dissipation wind channel of upper and lower wind-guiding, it is characterised in that be provided with above or below radiator for phase The first air ducting that blower fan is correspondingly arranged, the first air ducting is answered to be used for the radiation air produced to the blower fan in the horizontal direction Commutation guiding is carried out and above-below direction between.

8. the inverter cabinet with heat abstractor according to claim 7, it is characterised in that heat abstractor also includes and The second air ducting that one air ducting is correspondingly arranged, the second air ducting, the first air ducting are located at the phase of the radiator To both sides, the second air ducting be used for radiation air that the blower fan to corresponding setting produces in the horizontal direction with above-below direction it Between carry out commutation guiding.

9. the inverter cabinet with heat abstractor according to claim 8, it is characterised in that the first air ducting has two Individual, two the first air ductings are symmetrically arranged；Second air ducting has two, the symmetrical cloth of two the second air ductings Put.

10. the inverter cabinet with heat abstractor according to claim 9, it is characterised in that two the first air ductings Away from radiator heat dissipation wind channel one end air port respectively towards left and towards the right side, radiating of two the second air ductings away from radiator One end air port in air channel is respectively towards a left side and towards the right side.