Heat pump heat recovery type fresh air machine adopting return air supercooling and mixed air condensing

Abstract

The invention relates to a heat pump heat recovery type fresh air machine adopting return air supercooling and mixed air condensing. The heat pump heat recovery type fresh air machine comprises a compressor, a four-way reversing valve, an air exhaust coil pipe, a supercooling coil pipe, a throttling device, an air supply coil pipe, an air supply fan, an air exhaust fan and a bypass air port. The compressor, the four-way reversing valve, a refrigerant channel of the air exhaust coil pipe, a refrigerant channel of the supercooling coil pipe, the throttling device and a refrigerant channel of theair supply coil pipe are connected through a refrigerant connecting pipeline, a closed-cycle refrigerant flow path is formed, the air supply fan is connected with an air channel of the air supply coil pipe through an air supply air way, an air supply flow path is formed, an air channel of the supercooling coil pipe, an air channel of the air exhaust coil pipe and the air exhaust fan are connectedthrough an air exhaust air way, an air exhaust flow path is formed, the bypass air port communicates with the air supply air way and the air exhaust air way, and the bypass air port is opened under arefrigeration working condition and closed under a heating working condition. Under the condition that the volumes in the coil pipes are kept unchanged, the refrigerating capacity of unit mass flow of a refrigerant can be increased, and the air supply temperature can be reduced.

Description

technical field [0001] The invention relates to a fresh air blower, in particular to a heat pump heat recovery fresh air blower in which return air is supercooled and mixed air is condensed. Background technique [0002] Sending fresh air into the room is of great significance to human health. Many modern buildings, especially residential buildings, have begun to introduce fresh air air conditioning systems to improve indoor air quality. However, if the fresh air is directly sent into the air-conditioning area without any treatment, it will definitely increase the load on the air-conditioning system. In order to reduce or not increase the indoor load, the fresh air needs to be processed before being sent to the air-conditioning area, thus producing a fresh fan. [0003] At present, the treatment method of fresh air is mainly to use ordinary fresh air units to process the fresh air so that it reaches the air supply state point required by the design. For example, the direc...

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problems that the heat pump heat recovery type fresh air fan has a small return air volume, high condensation temperature, limited operating range under variable working conditions, and low efficiency under refrigeration conditions, and further provides a return air Heat pump heat recovery fresh air fan with subcooling and mixed air condensation

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