CN209844822U - Water-wind heat dissipation full-closed power cabinet - Google Patents

Abstract

The utility model relates to a fully enclosed power cabinet for water and wind heat dissipation, comprising a cabinet body, an air cavity, a water and wind heat exchanger, a centrifugal fan and several IGBT power modules. Installed side by side on the main mounting plate in sequence, the side wall of the IGBT power module is surrounded by an airtight casing, the top of the airtight casing is connected to the air chamber, the top of the air chamber is connected to the water-air heat exchanger, and the water-air The top of the heat exchanger is connected to a centrifugal fan, and a deflector is provided in the air outlet direction of the centrifugal fan, and the deflector guides the air outlet of the centrifugal fan so that the outlet air flows to the lower part of the cabinet body, and the air outlet The centrifugal fan draws the flow up from the bottom of the airtight enclosure to pass through the IGBT power module to exchange heat for the IGBT power module. The utility model can improve the operation reliability and service life of the capacitor, the resistor and the copper bar.

Description

A fully enclosed power cabinet with water and wind heat dissipation

technical field

The utility model belongs to the technical field of cabinet ventilation and heat dissipation, in particular to a water wind heat dissipation fully-sealed power cabinet.

Background technique

With the rapid development of wind energy, wind power converters are required to be smaller in size and higher in power density. Many converters are used in offshore environments or high-humidity environments. This not only needs to take away more losses per unit volume, but also A higher cabinet protection level is also required to make the cabinet a fully enclosed cabinet. For converter cabinets of this power level, the current better heat dissipation solution is water cooling. However, water cooling can only take away the heat of the IGBT very well. For components such as capacitors, resistors, and copper bars, the heat can only be dissipated after the heat exchange between the water-air heat exchanger in the cabinet and the components is transferred to water. In the secondary heat exchange process of air and air-to-water heat exchange, the heat dissipation effect of these devices is 5-10°C worse than that of air-cooled converters.

Therefore, based on these problems, it is of great practical significance to provide a power cabinet that can improve the operational reliability and lifespan of capacitors, resistors and copper bars, and can realize efficient water and wind heat dissipation in a fully enclosed cabinet.

Contents of the invention

The purpose of the utility model is to overcome the deficiencies of the prior art, to provide a power cabinet that can improve the operation reliability and service life of capacitors, resistors and copper bars, and can realize efficient water and wind heat dissipation in a fully enclosed cabinet.

The utility model solves its technical problem and realizes by taking the following technical solutions:

A fully enclosed power cabinet with water and air heat dissipation, including a cabinet body, an air cavity, a water and air heat exchanger, a centrifugal fan, and several IGBT power modules. The lower part of the cabinet is provided with a main mounting plate, and the IGBT power modules are arranged side by side in sequence. Installed on the main mounting plate, the side wall of the IGBT power module is surrounded by an airtight casing, the top of the airtight casing is connected to the air chamber, the top of the air chamber is connected to the water-air heat exchanger, and the water-air heat exchange The top of the device is connected to the centrifugal fan, and the air outlet direction of the centrifugal fan is provided with a deflector, and the deflector guides the air outlet of the centrifugal fan, so that the outlet air flows to the lower part of the cabinet body, and the outlet air passes through the centrifugal fan. The fan sucks a flow up from the bottom of the airtight casing through the IGBT power module to exchange heat for the IGBT power module.

Further, the wind cavity is a closed cavity structure.

Further, deflectors are provided between the centrifugal fans on the top of the adjacent IGBT power modules, and the deflectors are installed on the top wall of the cabinet.

Further, the cross section of the deflector is an inverted triangle.

Further, the bottom of the airtight casing is an air-permeable structure.

Advantage and positive effect of the present utility model are:

A sealed air chamber is installed above the IGBT power module of the utility model, and the upper part of the air chamber is well sealed and connected with the air inlet end of the water-air heat exchanger. A centrifugal fan is installed above the water-air heat exchanger. Through the suction effect of the centrifugal fan, Negative pressure is formed in the air cavity to absorb hot air for the IGBT power module. After this part of the hot air passes through the large laminated busbar to dissipate heat, it passes through the air cavity to complete the heat exchange between the water-air heat exchanger and water, resulting in low temperature The cooling airflow is blown out by the centrifugal fan, and the cooling airflow enters the IGBT power module through the function of the deflector, and cools the capacitor, resistor, and copper row in the power module to complete a heat dissipation cycle. The effect is good, the structure is compact, and the physical phenomenon that hot air rises and cold air sinks is effectively used, and the heat dissipation cycle is realized by means of fans and deflectors. It is suitable for heat dissipation of cabinets installed with IGBT power modules.

Description of drawings

The technical scheme of the utility model will be further described in detail below in conjunction with the drawings and embodiments, but it should be known that these drawings are only designed for the purpose of explanation, and therefore are not intended to limit the scope of the utility model. Furthermore, unless otherwise indicated, the drawings are only intended to conceptually illustrate the architectural configurations described herein and are not necessarily drawn to scale.

Fig. 1 is a schematic structural diagram of a fully enclosed power cabinet for water and wind heat dissipation provided by an embodiment of the present invention;

Fig. 2 is a schematic structural diagram of the IGBT power module in the fully enclosed power cabinet with water and wind heat dissipation provided by the embodiment of the present invention;

In the picture:

Fully enclosed cabinet-12, water-air heat exchanger-2, centrifugal fan-1, IGBT-6, film capacitor-10, large laminated busbar-11, air chamber-3, main installation board-13, AC copper bar -8, discharge resistor-7, water cooling plate-5, airtight casing-9, deflector plate-14, IGBT power module-4.

Detailed ways

First of all, it should be noted that the specific structure, features and advantages of the present utility model will be described in detail below by way of example, but all descriptions are only for illustration, and should not be interpreted as forming the basis for the present utility model. any restrictions. In addition, any single technical feature described or implied in each embodiment mentioned herein, or any single technical feature shown or implied in each drawing, can still be described in these technical features (or their equivalents) ) to continue any combination or deletion, so as to obtain more other embodiments of the present utility model that may not be directly mentioned herein. In addition, for the sake of simplifying the drawings, the same or similar technical features may only be marked in one place in the same drawing.

In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" The orientation or positional relationship indicated by etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship that is usually placed when the product of the utility model is used. It is only for the convenience of describing the utility model and simplifying the description, rather than Any indication or implication that a referenced device or element must have a particular orientation, be constructed, and operate in a particular orientation should not be construed as limiting the invention.

It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

The utility model will be specifically described below in conjunction with Fig. 1 to Fig. 2 .

Example 1

Fig. 1 is a schematic structural diagram of a water-air cooling fully enclosed power cabinet provided by an embodiment of the utility model; Fig. 2 is a structural schematic diagram of an IGBT power module in a water-wind cooling fully enclosed power cabinet provided by an embodiment of the utility model; as shown in Fig. 1 As shown in ~2, a fully enclosed power cabinet for water and air heat dissipation provided in this embodiment includes a cabinet body 12, an air cavity 3, a water and air heat exchanger 2, a centrifugal fan 1, and several IGBT power modules 4. The cabinet The lower part of the body 12 is provided with a main mounting plate 13, and the IGBT power modules 4 are installed side by side on the main mounting plate 13 in turn, and the side walls of the IGBT power modules 4 are surrounded by an airtight casing 9. The IGBT power module 4 is installed and fixed with the sealed casing 9 by conventional means such as bolts, rivets, and welding in the prior art, and the top of the sealed casing 9 is connected to the wind cavity 3, and the wind cavity 3 is a closed cavity. structure, the top of the wind chamber 3 is connected to the water-wind heat exchanger 2, the top of the water-wind heat exchanger 2 is connected to the centrifugal fan 1, and the centrifugal fan 1 is provided with a deflector 14 in the air outlet direction, and the deflector 14 guide the air outlet of the centrifugal fan 1 so that the air outlet flows to the lower part of the cabinet body 12, and the air outlet is sucked by the centrifugal fan 1 and rises from the bottom of the airtight casing 9 to flow through the IGBT power module 4, Perform heat exchange on the IGBT power module 4 .

Furthermore, it can also be considered in the utility model that deflectors 14 are arranged between the centrifugal fans 1 on the top of the IGBT power modules 4 adjacent to each other, so that not only can the deflectors 14 support the The air outlet of the centrifugal fan 1 is dredged, and the air outlets of the centrifugal fans 1 on the top of the adjacent IGBT power modules 4 are prevented from interfering with each other, causing the air outlet to not be well circulated; in order to facilitate installation, it can be considered The deflector 14 is installed on the top wall of the cabinet body 12; and, in order to better guide the air outlet, the cross section of the deflector 14 may be considered as an inverted triangle.

It should be pointed out that the bottom of the airtight casing 9 is an air-permeable structure. Specifically, it can be considered that there is no baffle at the bottom of the airtight casing 9, or that there is a baffle at the bottom of the airtight casing 9, but the baffle is a hollow structure. , as long as the bottom of the airtight casing 9 is an air-permeable structure, it is not necessary to stick to a specific structural shape.

It should be pointed out that the water-air heat exchanger 2 is a common water-air heat exchange product in the market, such as the JX051-002 product of Wuxi Heat Exchanger Factory.

It should be noted that the IGBT power module 4 can be considered as any existing product IGBT power module; in this embodiment, the IGBT power module 4 is an existing product IGBT power module, specifically refer to patent CN201721073695.1; As shown in Figure 2, the IGBT power module 4 includes an IGBT 6, an AC copper bar 8, a film capacitor 10, a water cooling plate 5, and a discharge resistor 7, wherein the IGBT 6 dissipates heat through the water cooling plate 5, and the AC copper bar 8, Devices such as film capacitor 10 and discharge resistor 7 all dissipate heat through the water-air heat exchanger 2 and centrifugal fan 1 in the cabinet; it should be pointed out that several of the IGBT power modules 4 realize electrical connection, the large laminated bus bar 11 is installed in the wind cavity 3 .

It should be noted that the fixed connection method in the present invention adopts conventional methods such as bolts, rivets, and welding, which are mature in the prior art, and will not be repeated here, but due to the above reasons, it will not affect the repeated reproduction of those skilled in the art. .

As an example, in the present utility model, a sealed air chamber is installed above the IGBT power module, and the upper part of the air chamber is well sealed and connected with the air inlet end of the water-air heat exchanger, and a centrifugal fan is installed above the water-air heat exchanger. When starting to work, negative pressure is formed in the air chamber through the suction effect of the centrifugal fan, thereby absorbing hot air for the IGBT power module in the sealed casing. The air cavity carries out the heat exchange between the water-air heat exchanger and the water, and turns into a low-temperature cooling air flow, which is then blown out by the centrifugal fan, and the cooling air flow enters the sealed casing through the function of the deflector, as shown in Figure 1. Arrows indicate the air flow channel, which cools the capacitors, resistors, copper bars and other structures of the IGBT power module to complete a heat dissipation cycle. Physical phenomena, and realize heat dissipation circulation with the help of fans and deflectors.

To sum up, the utility model can provide a power cabinet that can improve the operation reliability and lifespan of capacitors, resistors and copper bars, and can realize efficient water and wind heat dissipation in a fully enclosed cabinet.

The above embodiments have described the utility model in detail, but the content described is only a preferred embodiment of the utility model, and cannot be considered as limiting the implementation scope of the utility model. All equal changes and improvements made according to the application scope of the utility model should still belong to the scope covered by the patent of the utility model.

Claims (5)

1. A fully enclosed power cabinet with water and wind heat dissipation, characterized in that: it includes a cabinet body, an air cavity, a water and wind heat exchanger, a centrifugal fan and several IGBT power modules, and the lower part of the cabinet is provided with a main mounting plate. The IGBT power modules are installed side by side on the main mounting board in turn, and the side walls of the IGBT power modules are surrounded by a sealed casing, the top of the sealed casing is connected to the air chamber, and the top of the air chamber is connected to the water-air heat exchanger. The top of the water-air heat exchanger is connected to a centrifugal fan, and a deflector is provided in the air outlet direction of the centrifugal fan, and the deflector guides the air outlet of the centrifugal fan so that the outlet air flows to the lower part of the cabinet. , and the outlet air is sucked by the centrifugal fan and rises from the bottom of the airtight casing to flow through the IGBT power module to exchange heat for the IGBT power module. 2. A fully enclosed power cabinet with water and wind heat dissipation according to claim 1, characterized in that: the wind cavity is a closed cavity structure. 3. A fully enclosed power cabinet with water and wind heat dissipation according to claim 1, characterized in that: deflectors are provided between the centrifugal fans on the top of the IGBT power modules adjacent to each other, and the deflectors The board is mounted on the top wall of the cabinet. 4 . The fully enclosed power cabinet for water and wind heat dissipation according to claim 3 , wherein the cross section of the deflector is an inverted triangle. 5 . 5 . The fully enclosed power cabinet with water and wind heat dissipation according to claim 1 , wherein the bottom of the airtight enclosure is a structure through which air can circulate. 5 .