Air-conditioner and control method thereof

Abstract

The invention discloses an air-conditioner and a control method thereof. The air-conditioner comprises an outdoor heat exchanger, a four-way valve, a compressor, an indoor heat exchanger and a throttling device, wherein the throttling device is in tandem connection between the outdoor heat exchanger and the indoor heat exchanger. The air-conditioner is characterized in that the throttling device comprises a multi-ported valve and more than two throttling elements with different flow rates, wherein the multi-ported valve is provided with a switching mechanism; more than three ports are arranged on the multi-ported valve; one end of the more than two throttling elements with different flow rates is respectively communicated with two of the more than three ports; the other end of the more than two throttling elements with different flow rates are connected in parallel and then are communicated with the indoor heat exchanger; the rest of the more than three ports is communicated with the outdoor exchanger. The invention has the characteristics of simplicity and reasonability, flexible operation, low cost and wide application range, can effectively improve the energy efficiency of the air-conditioner, and simultaneously improve the maximum operational capability and low-temperature heating capability of the air-conditioner.

Description

technical field [0001] The invention relates to an air conditioner, in particular to an air conditioner and an air conditioner control method. Background technique [0002] Inverter air conditioners can adjust the operating frequency within a certain range as the load changes to change the output capacity. When the frequency is high, it can achieve rapid cooling or heating, and when the frequency is low, the output is reduced to achieve the purpose of energy saving. However, if the ordinary inverter air conditioner adopts capillary throttling, the energy efficiency ratio of the ordinary inverter air conditioner can only be optimized at a certain frequency when cooling or heating due to the fixed cooling capillary flow and heating capillary flow. When operating at other frequencies, the energy efficiency is not in the optimal state, which is manifested in the fact that the annual energy consumption efficiency SEER, the heating season energy consumption efficiency HSPF and th...

AI Technical Summary

Problems solved by technology

However, if the ordinary inverter air conditioner adopts capillary throttling, the energy efficiency ratio of the ordinary inverter air conditioner can only be optimized at a certain frequency when cooling or heating due to the fixed cooling capillary flow and heating capillary flow. The energy efficiency is not optimal when running at other frequencies, which means that the annual energy consumption efficiency SEER, the heating season energy consumption efficiency HSPF and the cooling season energy consumption efficiency APF are not high

At the same time, due to the fixed capillary flow rate, when ordinary inverter air conditioners operate at high frequencies, exhaust temperature protection often occurs under many working conditions, so that ordinary inverter air conditioners cannot maintain high-frequency operation and cannot achieve rapid cooling or heating. Purpose

[0003] In order to solve these problems, some high-end inverter air conditioners on the market now start to use electronic expansion valves to throttle, which can improve energy efficiency and effectively avoid exhaust temperature protection, etc. many

[0004] Fixed-speed air conditioners generally use capillary throttling, but due to the fixed capillary flow, exhaust protection often occurs under severe working conditions. In low-temperature conditions, the heating capacity is low, and the blowing air of the air conditioner is relatively cool, causing customer dissatisfaction

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