Control device and method used for air conditioner as well as air conditioner

Abstract

The invention discloses a control method and device used for an air conditioner as well as the air conditioner. The control method comprises the following steps of: presetting degree of superheat, difference of degree of superheat and operation frequency of a compressor, which are sequentially reduced gradually; obtaining a set temperature and an initial environment temperature, and calculating to determine a temperature difference value to generate temperature difference matching results; obtaining a back temperature and a coil pipe temperature, calculating to determine the degree of superheat and the difference of degree of superheat; controlling the compressor to operate under frequency H1, regulating opening degree of an expansion valve according to the temperature difference matching results, the degree of superheat and the difference of degree of superheat, operating for set time with preset degree of superheat or preset difference of degree of superheat in sequence, keeping frequency of the compressor and opening degree of the expansion valve if the set temperature is reached; otherwise, switching the compressor to operate with next frequency. According to the control method disclosed by the invention, the expansion valve is regulated with opening degree which corresponds to set degree of superheat or set difference of degree of superheat according to back temperatures of different heat exchange and air supply units, so that a plurality of air outlets discharge air at different temperatures, and therefore, effects of natural air supplying and cold-heat mixing are simulated indoors.

Description

Technical field [0001] The present invention relates to the technical field of air conditioners, in particular to a control method, device and air conditioner for air conditioners. Background technique [0002] At present, most of the air-conditioning products on the market only have a set of circulation system. The circulation system only has a single number of evaporators, condensers, expansion valves and other main components. Air-conditioning functions such as refrigeration and dehumidification need to be completed by this circulation system. In actual use, the existing air-conditioning products cannot achieve the best operating conditions of multiple functions such as refrigeration and dehumidification at the same time. For example, the air-conditioning system has a poor cooling effect during the dehumidification process, and when the cooling effect is good, it cannot satisfy the dehumidification station. The required temperature conditions, when the indoor temperature is lo...

AI Technical Summary

Problems solved by technology

[0002] Most of the air-conditioning products on the market now only have a set of circulation system, in which only a single number of evaporators, condensers, expansion valves and other main components are installed, and air-conditioning functions such as refrigeration and dehumidification need to rely on this circulation system to complete. In the actual use process, the existing air-conditioning products cannot achieve the optimal operation status of multiple functions such as cooling and dehumidification at the same time. The required temperature conditions, when the indoor temperature is low and the humidity is high, it cannot meet the requirements of blowing without cooling and dehumidification, or when the temperature is high and the humidity is high, it cannot quickly meet the problems of cooling, cooling and dehumidification at the same time

[0003] At the same time, in a large indoor environment with a large area, users in different areas have differentiated cooling or air supply requirements, and conventional air-conditioning products are far from meeting the diverse needs of users.

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