Constant-dew-point-temperature and variable-flow heat pump dehumidification type precision air conditioner and control method thereof

Abstract

The invention discloses a constant-dew-point-temperature and variable-flow heat pump dehumidification type precision air conditioner and a control mode thereof, and belongs to the field of energy utilization technologies and air conditioning. The precision air conditioner is composed of an air feeder, a surface air cooler, a fresh air valve, a dew point temperature transmitter, a temperature and humidity sensor, a return air valve and a variable-flow heat pump system. According to the precision air conditioner and the control mode thereof, after return air and fresh air are mixed and filteredthrough the fresh air valve and the return air valve correspondingly, pre-cooling is carried out through an evaporator of the variable-flow heat pump system, then stepless regulation is carried out through the surface air cooler for accurate temperature control, so that the temperature of the air passing through the surface air cooler reaches the dew point temperature corresponding to the indoor working condition required to be controlled, then stepless accurate adjustment is carried out through a condenser of the variable-flow heat pump system for temperature rise and dehumidification, and therefore the required indoor temperature and humidity are achieved.

Description

technical field [0001] The invention relates to a precision air conditioner with constant temperature and humidity, in particular to a heat pump dehumidification type precision air conditioner with constant dew point temperature and variable flow rate and its control method. Background technique [0002] Most of the technology constant temperature and humidity air conditioning systems in my country adopt the mixed mode of fresh return air, which first performs freezing and cooling, and then heats up and dehumidifies. Most of the heating methods use hot water, steam or electric heating. There are many problems in such a dehumidification method and control logic: 1. There are cold and heat offsets and the evaporation temperature is too low, and the power consumption required for cooling is too large; 2. The traditional heating method has low heating efficiency and large power consumption; 3. With the traditional control logic strategy, the control accuracy of temperature and h...

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Problems solved by technology

There are many problems in such a dehumidification method and control logic: 1. There are cold and heat offsets and the evaporation temperature is too low, and the power consumption required for cooling is too large; 2. The traditional heating method has low heating efficiency and large power consumption; 3. With the traditional control logic strategy, the control accuracy of temperature and humidity is difficult to be precise; 4. There may be large horse-drawn carts for cooling and dehumidification, which cannot be distributed according to needs, and the energy efficiency ratio of the whole machine is low

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