Wind-exhaust and heat-recycle air-conditioning system of multi-stage and all-condition continuous heat pump

Abstract

The invention discloses a wind-exhaust and heat-recycle air-conditioning system of a multi-stage and all-condition continuous heat pump, which comprises a new wind pipe, a wind exhaust pipe, a first-stage refrigerating system and a second-stage refrigerating system, wherein the first-stage refrigerating system comprises a first-stage condenser, a first-stage compressor and a first-stage main evaporator successively connected in series; the first-stage condenser is arranged in a fresh wind pipe; the first-stage main evaporator is arranged in an exhaust wind pipe; the second-stage refrigeratingsystem comprises a second-stage condenser, a second-stage compressor and a second-stage main evaporator successively connected in series; the second-stage condenser is arranged in the fresh wind pipein the upwind direction of the first-stage condenser; and the second-stage main evaporator is arranged in the exhaust wind pipe in the downwind direction of the first-stage condenser. The air-conditioning system provided by the invention has the advantages that the system can meet the air-conditioning requirements in winter and transition season, does not need to be matched with other air-conditioning equipment, has high heating energy efficiency, does not need to be provided with an auxiliary heat source for defrosting, reduces the energy consumption and simultaneously decreases the power distribution capacity of the air-conditioning system, thereby having good social and economic benefits.

Description

technical field [0001] The invention relates to a multi-stage full working condition continuous heat pump exhaust heat recovery air conditioning system. Background technique [0002] The existing heat pump heat recovery heating and humidifying air-conditioning system adopts a single-stage refrigeration system. In winter, especially in northern areas, the fresh air temperature is low (minus 20°C), and the heat recovery of the unit is insufficient. Other air-conditioning heating equipment is required to heat and humidify the fresh air. . At the same time, due to the large operating range of the unit, the unit with a single-stage refrigeration system operates unstable. In addition, the existing heat recovery unit adopts the reverse defrosting method, which causes large temperature fluctuations or blows cold air. It is necessary to configure other auxiliary heat sources to compensate for the heat of the fresh air. In some air-conditioned places, since there are no other auxili...

AI Technical Summary

Problems solved by technology

At the same time, due to the large operating range of the unit, the unit with a single-stage refrigeration system operates unstable

In addition, the existing heat recovery unit adopts the reverse defrosting method, which causes large temperature fluctuations or blows cold air. It is necessary to configure other auxiliary heat sources to compensate for the heat of the fresh air.

In some air-conditioned places, since there are no other auxiliary heat sources, continuous heat recovery is required in winter and transitional seasons. At the same time, the process requires that the exhaust air temperature must be close to the outdoor ambient temperature, and the existing heat recovery units cannot meet the requirements.

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