Transcritical CO2 heat pump air heating system and air cooling device

Abstract

The invention provides an air cooling device for a transcritical CO2 heat pump air heating system. The air cooling device comprises a rectangular shell, wherein an air channel is arranged in the rectangular shell; an air inlet interface and an air outlet interface communicated with the air channel are arranged at both ends of the rectangular shell; the air channel is provided with at least four heat exchanging units in the structural form of finned pipe type heat exchanger at intervals side by side; multiple heat exchanging units are connected in series to form a heat exchanging group by a flange; the heat exchanging units are arranged based on the heat exchanging area; the heat exchanging area of the final heating exchanging unit close to the air inlet interface end is the largest; the ratio of the heat exchanging area of the final heat exchanging unit to the first heat exchanging unit is greater than 3; the air inlet connector of the first heat exchanging unit is the air inlet end of the heat exchanging group; the air outlet connector of the final heat exchanging unit is the air outlet end of the heat exchanging group; and the air inlet end of the heat exchanging group and the air outlet end of the heat exchanging group pass out of the rectangular shell. The device has the advantages of high heating efficiency and strong warming ability. The heat pump air heating system can be used for providing high-temperature air, and has the advantages of low energy consumption and wide application range.

Description

technical field [0001] The present invention relates to transcritical CO 2 In the field of heat pump systems, specifically transcritical CO 2 A heat pump air heating system and an air cooler applied to the system. Background technique [0002] CO 2 As an ideal refrigerant naturally occurring in nature, it has the advantages of non-toxic, non-flammable, low price, and no damage to the ozone layer. With the enhancement of people's awareness of environmental protection, CO 2 Refrigerants have received increasing attention, especially CO in the transcritical state 2 There is a large temperature glide during the heat release process. Once this temperature glide matches the heat absorption characteristics of the cooling medium, the cooling medium can be heated to a very high temperature, which has the advantage of reducing energy consumption. [0003] For transcritical CO with air as the cooling medium 2 The heat pump system mainly includes a compressor, an air cooler, a rege...

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Problems solved by technology

The existing heat pump system is limited by the heat transfer capacity of the air cooler and the heat absorption characteristics of the air, and has the defects of low heat transfer efficiency and limited heating capacity. Generally, the temperature of the cooling medium air can be raised to 60°C, but it is difficult to further increases, limiting the transcritical CO with air as the cooling medium 2 application of heat pump systems, therefore, it is necessary to improve

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