Method for improving heating effect of multi-connected machine indoor machines and unit thereof

Abstract

The invention discloses a method for improving the heating effect of multi-connected machine indoor machines and a unit thereof. The method comprises the steps of 1, stopping partial indoor machines while partial indoor machines of indoor units (5) carry out heating and carrying out operation for t1; 2, detecting the opening degree of an outdoor machine electronic expansion valve (4), obtaining the saturate temperature value T1 of an outdoor heat exchange machine (3) and detecting the exhaust temperature T2 of a compressor (1); 3, setting the refrigerant lack condition of the indoor machines in the heating mode according to the opening degree of the outdoor machine electronic expansion valve (4), the saturate temperature value T1 and the exhaust temperature T2 in the step 2, implementing the step 4 if the condition is met and otherwise, implementing the step 5; 4, increasing the opening degree of indoor machine electronic expansion valves (6) of the stopped indoor machines, and implementing the step 2; and 5, maintaining the increased opening degree of the indoor machine electronic expansion valves (6) of the stopped indoor machines. The method and the unit have the advantages that the heating effect is guaranteed, and the needed energy consumption is low.

Description

technical field [0001] The invention relates to a method for improving the heating effect of a multi-line internal mechanism and the unit thereof. Background technique [0002] Air-conditioning has become a part of people's life as refrigeration or heating equipment, which improves the comfort of people's life, but the operation of air-conditioning needs to consume more electric energy. The operating cycle of the air conditioner is also longer, and generally there is no problem in running it for 10 years. At present, the multi-connected air conditioners on the market, especially when heating, adopt a new technical solution for the phenomenon of refrigerant bias flow, so that the heating effect of the system can be improved. [0003] For example, the Chinese patent with the application number CN201110255060.4, the patent name is: Control method for preventing refrigerant drift when multi-connected air-conditioning unit is heating, the invention discloses a control method for...

AI Technical Summary

Problems solved by technology

[0004] However, the above-mentioned technical solution simply returns the refrigerant of the indoor unit with more refrigerant to the indoor unit with smaller refrigerant to improve the heating effect of the system. This technical solution cannot solve the following problems: multi-connected air-conditioning unit When some indoor units are in the heating state and some indoor units are in the shutdown state, there will be a large amount of liquid in the indoor units in the shutdown state. When the total amount of refrigerant in the system is insufficient, it will lead to The total amount of refrigerant in the indoor unit is insufficient, the exhaust temperature of the compressor is too high, and the electronic expansion valve of the outdoor unit is too large, resulting in poor heating effect of the indoor unit in the heating state, and high energy consumption of the system as a whole

Images