Anti-frosting fresh air heat recovery device and control method thereof

Abstract

The invention provides an anti-frosting fresh air heat recovery device and a control method thereof. The device comprises a heat recovery core body (1), a heat pump system and a dehumidification rotating wheel (2), the heat pump system comprises an evaporator (3) and a condenser (4), and the dehumidification rotating wheel (2) comprises a dehumidification area and a regeneration area. On the exhaust side, the dehumidification area of the dehumidification rotating wheel (2) and the evaporator (3) are sequentially arranged on the upstream of the heat recovery core body (1). On the fresh air side, the condenser (4) and the regeneration area of the dehumidification rotating wheel (2) are sequentially arranged on the downstream of the heat recovery core body (1). By means of the fresh air heat recovery device, energy consumption of frosting prevention of the fresh air heat recovery device can be reduced.

Description

[0001] This application claims the priority of the Chinese patent application with the application number 202010666254.2 and the invention title "Anti-Frosting Fresh Air Heat Recovery Device" submitted to the China Patent Office on July 9, 2020, the entire contents of which are incorporated by reference in this application . technical field [0002] The invention relates to the technical field of fresh air energy saving, in particular to an anti-frost fresh air heat recovery device and a control method thereof. Background technique [0003] With the development of building energy conservation, it has become an increasingly common practice to apply fresh air-exhaust air two-way flow heat recovery devices to buildings to recover the energy in the exhaust air while sending fresh air into the building. However, in the severe cold and cold regions of the north, when the outdoor temperature is low in winter, frosting will occur during the operation of the heat recovery device, whi...

AI Technical Summary

Problems solved by technology

In order to solve the frosting problem of the fresh air heat recovery device, the existing technology usually uses electric heating to preheat the outdoor fresh air, and preheats the temperature of the outdoor fresh air to above the heat recovery frosting threshold (such as 0°C), such as figure 1 As shown, the advantage of this method is that the unit structure is simple, the initial investment is low, but the energy consumption is high

Using this preheating method not only consumes preheating energy, but also reduces the recoverable energy of the heat recovery device, thus greatly reducing the energy-saving effect of fresh air heat recovery

[0005] Therefore, how to solve the technical problem of high energy consumption when the fresh air heat recovery device prevents frosting in the prior art has become a technical problem that needs to be solved urgently in this field

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