High-precision constant-temperature and humidity air conditioner operated in wide temperature range

Abstract

The invention relates to a high-precision constant-temperature and humidity air conditioner operated in a wide temperature range. The air conditioner comprises an outdoor machine and an indoor machine, wherein the outdoor machine is provided with a condenser and a condensing fan; the indoor machine comprises an evaporator, a thermal recovery exchanger, an electric heater, a humidifier and a blower; and a compressor is formed by connecting in parallel a constant-frequency compressor and a variable-frequency compressor (or a digital scroll compressor) and is arranged in the indoor machine. As the system adopts frequency conversion technology or digital vortex technology and electronic expansion valve technology and unique classified evaporator control, condenser fan frequency-conversion control technology and evaporator frostless structural design, the air condition broadens the use environment range, indoor temperature control environment (between 7 and 30 DEG C) and relative humidity control environment (between 35 and 70 percent RH), can be reliably operated in the outdoor high-temperature environment of 45 DEG C, also improves the controlling precision of indoor temperature and humidity, and is applicable to places with severe requirements on temperature and humidity and large environmental temperature change.

Description

Technical field: [0001] The invention belongs to the technical field of air conditioners, in particular to a high-precision constant temperature and humidity air conditioner capable of operating in a wide temperature range. Background technique: [0002] At this stage, conventional constant temperature and humidity air conditioners consume more energy than ordinary air conditioners. On the one hand, conventional constant temperature and humidity air conditioners need to use refrigeration to overcome the heat and humidity in the room; Cooling capacity and over-dehumidification capacity, usually this reheat is very large, accounting for nearly 30% to 40% of the cooling capacity. [0003] Furthermore, conventional constant temperature and humidity air conditioners can only use auxiliary heaters and humidifiers for high-precision control, and rely on precise control means (such as thyristor PID adjustment) to accurately adjust the heating and humidification. Achieve high-preci...

AI Technical Summary

Problems solved by technology

At the same time, conventional constant temperature and humidity air conditioners also have disadvantages such as poor load adaptability, low control accuracy, severe cold and heat offset, frequent compressor startup, impact on compressor life, and large impact on the power grid.

[0004] Finally, conventional constant temperature and humidity air conditioners are

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