Evaporative cooling unit with frost prevention structure

Abstract

The invention provides an evaporative cooling unit with a frost prevention structure. The evaporative cooling unit comprises an indoor circulating system, an outdoor circulating system, a metal filterscreen, a refrigerating system and a frost prevention system, wherein the indoor circulating system is provided with an indoor return air inlet and an indoor air supply outlet, and indoor air entersthe indoor circulating system by the indoor return air supply inlet and then is sent back to the indoor by the indoor air supply outlet; the outdoor circulating system is provided with an outdoor airinlet and an outdoor air outlet, and outdoor air enters the outdoor circulating system by the outdoor air inlet and then is exhausted to the outdoor by the outdoor air outlet; the metal filter screenis arranged at the outdoor air inlet so as to filter the outdoor air; the refrigerating system can transfer heat of air in the indoor circulating system to air in the outdoor circulating system, so that the temperature of the air in the outdoor circulating system increases; and the frost prevention system is provided with a frost prevention air duct capable of exhausting the air with increased temperature in the outdoor circulating system to the metal filter screen. The outdoor air with increased temperature is exhausted to the metal filter screen through the frost prevention air duct, so thatthe surface temperature of the metal filter screen is increased, and frosting, icing and snow accumulation on the metal filter screen are prevented.

Description

technical field [0001] The invention relates to the field of air conditioning, in particular to an evaporative cooling unit with a frost-proof structure. Background technique [0002] The indirect evaporative cooling air conditioning unit is a highly efficient and energy-saving air conditioning product, which includes indoor air circulation and outdoor air circulation. Because the outdoor air quality varies greatly depending on the installation and application environment, in order to prevent debris from entering the air-air heat exchanger, an air filter is usually installed at the air inlet on the outdoor side. Ordinary air filters are easily damaged after being cleaned 2-3 times and need to be replaced frequently. In order to reduce operating costs, reusable metal air filters are generally used on the outdoor air intake side. [0003] However, the outdoor air intake side of the indirect evaporative cooling air-conditioning unit is equipped with a metal air filter. When t...

AI Technical Summary

Problems solved by technology

[0003] However, the outdoor air intake side of the indirect evaporative cooling air-conditioning unit is equipped with a metal air filter. When the outdoor temperature drops in winter, the metal filter is prone to frosting or even freezing. When it snows, the surface of the metal filter is also prone to snow accumulation, causing metal filter clogged

Thereby reducing the air intake on the outdoor circulation side and affecting the operating efficiency of the product

In order to solve this problem, measures such as belt-type electric heating or heaters are usually installed at the air inlet filter to heat the inlet metal filter when the temperature is low in winter. Although the above measures can solve the problems of frosting or icing and snow accumulation, but causes additional power loss

The electric heating is exposed at the air inlet, which poses a safety hazard

In order to meet the extreme low temperature and high humidity environment, the electric heating power is relatively large, which reduces the operating efficiency of the unit

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