Multi-connected air conditioner working principle and key core components function

Advantages:

Saving space in the building area, precise temperature control and comfort;

Lower noise, quiet operation;

Energy saving and low running costs for small areas.

Flexible control, remote control can be realized by telephone and modem;

Easy construction and installation, can meet the requirements of different working conditions;

Disadvantages:

The initial investment will be higher;

If a fresh air system is required, it is necessary to order external additions;

The length of refrigerant pipe and the height difference between indoor and outdoor units are strictly limited;

It is not applicable to room types with large room depth, small static pressure outside the machine and short air supply distance;

The cooling (heating) capacity of a set of units is limited and cannot meet the air-conditioning requirements of larger rooms;

Key Components for Multi-split Air Conditioners

Compressor: Adjusts speed according to real-time system demand for energy-efficiency management to ensure that the system supplies cooling/heating on demand.

Compressor oil heating tape: Maintains the compressor oil temperature during non-operating conditions to ensure reliability and efficiency when starting up again.

Compressor Discharge Temperature Sensor Package: Monitor the compressor discharge temperature for control and protection of the system to avoid overheating damage.

High pressure switch: when the compressor exhaust pressure exceeds the standard immediately respond to cut off the power supply, to protect the compressor from damage.

Oil separator: effectively separating the oil in the refrigerant gas, maintaining the stability and durability of the compressor operation.

Oil equalizer: further refine the oil and gas separation, to ensure that the whole system runs efficiently and stably.

Check valve: prevent the high pressure gas backflow, to protect the safety of the compressor, while promoting the suction and discharge pressure balance.

High-pressure sensor: real-time monitoring of the system's high-pressure status, to provide data support for compressor protection and system control.

Four-way valve: Realize rapid switching between cooling and heating modes of the indoor unit.

Heat exchanger (condenser): located outside, responsible for discharging system heat to the outside environment.

Fan (fan motor): Enhances the heat exchange efficiency of the heat exchanger and accelerates the heat dissipation or absorption process.

Frost Sensor Package: Specially designed to detect and initiate the defrosting process to ensure the heating effect in winter.

Electronic expansion valve for heating: regulates refrigerant flow in heating mode to optimize heat output.

One-way valve (cooling mode bypass): directs refrigerant bypass in cooling mode, regulates refrigerant flow path.

Subcooler electronic expansion valve: control the degree of subcooling of the liquid tube during cold operation to reduce energy loss.

Supercooler liquid outlet temperature sensing package: monitor the temperature of the liquid tube at the outlet of the supercooler to ensure that the refrigerant is in proper condition.

Gas-liquid separator inlet tube temperature sensing package: detect the temperature before entering the gas-liquid separator to prevent the unit from running wet.

Subcooler gas outlet temperature sensing package: Measure the temperature of the gas side of the subcooler to optimize the system efficiency.

Gas-liquid separator outlet pipe temperature sensing package: monitoring the temperature of the separated gas, feedback to the control system to adjust the compressor working status.

Environment temperature sensing package: sensing the temperature around the outdoor unit, assisting the system to adjust the operation strategy.

Low Pressure Sensor: Monitor the low pressure status of the system to prevent abnormal operation due to insufficient pressure.

Gas-liquid separator: Separate gaseous and liquid refrigerant, to avoid the compressor inhaling liquid refrigerant causing damage.

Unloading valve: balancing the system pressure, preventing local high pressure, to protect the pipeline safety.

Oil return solenoid valve: precise control of compressor oil return, to ensure adequate supply of lubricating oil.

Pressure balancing valve: help the compressor start smoothly, to ensure that the pressure balance at the beginning of the start.

Oil return temperature sensing package: monitoring the temperature of the return oil, to prevent clogging or leakage of the pipeline.

Capillary tube: Utilizing the throttling effect to reduce the refrigerant pressure and control the flow rate.

Subcooler: Enhance the subcooling effect of refrigerant and improve system efficiency.

Filter drier: adsorb water and impurities in the system to protect the system from contamination.

Filter: block impurities into the key components, keep the system clean.

Liquid valve: closed at factory, need to be opened during commissioning, used for refrigerant charging path control.

Low Pressure Measuring Valve: Used for detecting and regulating the low pressure status of the system, as well as refrigerant charging operation.

Air valve: closed at the factory and opened during commissioning, it is another way of refrigerant charging.

Oil check valve: to check the compressor oil quality during maintenance to ensure that the oil quality meets the requirements.