Large-capacity multiple air conditioner/heat pump units

Abstract

The invention relates to a large-capacity multigang air-conditioner / heat pump unit, which belongs to the technical field of refrigerating air conditioner. The large-capacity multigang air-conditioner / heat pump unit comprises an outdoor unit basic unit, a plurality of outdoor unit expansion units and a plurality of independent indoor unit units, and is characterized in that various outdoor unit expansion units are formed by compressors and evaporator / condensers; compressors of the outdoor unit basic unit are connected with the compressors of the various outdoor unit expansion units through return gas pipes, oil balance pipes and exhaust pipes; evaporator / condensers of the outdoor unit basic unit are connected with the evaporator / condensers of the various outdoor unit expansion units through gas collectors and liquid collectors; and liquid connecting pipes and gas connecting pipes of the outdoor unit basic unit are correspondingly connected with liquid connecting pipes and gas connecting pipes of various indoor unit units, so as to form a vapor compression refrigeration / heating cycle. The comprehensive performance coefficients IPLV(C) and IPLV(H) of the large-capacity multigang air-conditioner / heat pump unit can be improved; the operation reliability of the unit can be improved; and the equipment cost can be reduced.

Description

A large-capacity multi-connected air conditioner / heat pump unit technical field The invention relates to a large-capacity multi-connected air conditioner / heat pump unit, which belongs to the technical field of refrigeration and air conditioning, and is especially suitable for cooling and heating in buildings with multiple rooms and large cooling / heating area. Background technique Since the multi-connected air conditioner / heat pump unit has outstanding advantages such as independent control of indoor units, flexible use, good expandability, small installation space, and no special machine room, it has developed rapidly since its birth in Japan in 1982, and has become a Chinese , One of the most active forms of central air-conditioning systems in small buildings. The characteristics of the multi-connected air conditioner / heat pump unit are mainly two points: one is that there are multiple indoor units, and the other is a cooling / heating system formed by connecting the outdoo...

AI Technical Summary

Problems solved by technology

(1) Since the evaporator / condenser 3 of each outdoor unit and its heat exchange fan 4 are only used by the module outdoor unit, for the large-capacity modular outdoor unit, partial load adjustment can only be realized by stopping part of the module outdoor unit , so that all the outdoor evaporators / condensers 3 of the large-capacity modular outdoor unit cannot be used at the same time, and the part-load energy efficiency ratio of the multi-connected air conditioner / heat pump unit is lower than COP0 / COPh. An important reason for the low comprehensive performance coefficient IPLV(C) and IPLV(H) of the unit;

(2) When the large-capacity modular outdoor unit is operating at part load, the evaporator / condenser 3 and the fan 4 of the operating modular outdoor unit generally operate synchronously, resulting in increased energy consumption at part load, which is also part load Another reason why energy efficiency is lower than COP0 and COPh

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