Heat radiation structure of circuit module and outdoor unit of variable-frequency air conditioner

Abstract

The invention discloses a heat radiation structure of a circuit module and an outdoor unit of a variable-frequency air conditioner. The heat radiation structure comprises a circuit board (1), a mounting support (2), electronic devices (3) and a heat radiator (4), wherein the electronic devices penetrate one side of the mounting support to be connected with a circuit board on the other side, and the heat radiator is abutted against the surfaces of the electronic devices; a zigzag structure (21) used for reducing mutual contact area is formed on the contact surface between the circuit board and the mounting support. Furthermore, the heat radiation structure comprises an electric control box (5), various parts are sequentially stacked in the electric control box, the heat radiator extends out of the electric control box, and an air inlet passage (7) facing the heat radiator is formed on the electric control box. The heat radiation structure is mounted in a case (9) via the electric control box and close to an air wheel (12) of the outdoor unit. With the zigzag structure, water accumulation is well prevented; with the mounting structure and the air passage, heat radiation effect of the heat radiator is well improved so as to radiate heat on the surface of the circuit board.

Description

technical field [0001] The invention relates to the field of frequency conversion air conditioners, in particular to a heat dissipation structure of an outdoor unit of frequency conversion air conditioners and a circuit module installed therein. Background technique [0002] The heart of the inverter air conditioner is the inverter compressor. The higher the frequency, the higher the efficiency of the compressor. In order to ensure the high-frequency operation of the compressor, the control device of the compressor must have a reliable heat dissipation effect to ensure the reliable operation of the compressor. Power compressors develop high-power products, which greatly reduces product costs. Therefore, the heat dissipation of frequency conversion air conditioners has always been a key and difficult point in the refrigeration industry, especially the heat dissipation of frequency conversion modules. The heat dissipation of the frequency conversion module is to absorb the he...

AI Technical Summary

Problems solved by technology

However, due to the large amount of heat generated by electronic components, the cooling effect of the fan wheel of the outdoor unit on the radiator has always been poor, and water vapor is easy to condense and accumulate on the contact part between the circuit board and the bracket, forming water under high-temperature rapid drying. spots, and even cause circuit boards to short circuit

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