Many people are still unfamiliar with home central air conditioning. Below we will give you a comprehensive introduction to what is a central air conditioner for home use? From the three most common types of household central air conditioners, analyze the advantages and disadvantages of home central air conditioners one by one, so that you can better Choose a home central air conditioner.
What is home central air conditioning
Household central air conditioning refers to the design and installation of the national air conditioning system according to the design parameters and requirements of the national air conditioning design specification. The home central air conditioner is an air conditioning system that sends hot and cold air from the outdoor host, the indoor fan coil and its connected air duct to achieve indoor air conditioning. According to the working principle, it can be divided into two types: one is a large central air conditioning system. Air conditioning systems evolved from equipment such as small air-cooled chillers, small air duct units are the main products; the other is the air-conditioning system evolved from split-wall air-conditioning equipment.
The three most common types of household central air conditioners: cold/hot water units; ducted systems; multi-line systems.
Home central air conditioning: cold / hot water unit
The conveying medium of the cold/hot water unit is usually water or an ethylene glycol solution. It generates air-conditioning cold/hot water from the outdoor host to the end devices of the indoor system, and the cold/hot water exchanges heat with the indoor air at the end device to generate cold/hot air, thereby eliminating the air conditioning load of the room. It is a form of air conditioning system that concentrates on generating cold/heat and disperses the load of each room. The end device of the cold/hot water unit is usually a fan coil.
advantage:
1. High energy consumption ratio;
2, the temperature difference is small, very comfortable;
3, each room temperature can be freely adjusted, more energy efficient;
4. The water pipe takes up less space and is easy to decorate;
Disadvantages:
1. The system is complex, the cost is high, and the construction quality is not high, there will be hidden dangers of water leakage, and maintenance is troublesome;
2, can not directly introduce new winds;
3, affected by the climate, can not work normally below -5 °C, need to install auxiliary heating device, also need to consume some additional energy.
Home central air conditioning: duct system
As the name implies, the air duct system uses air as the transport medium. It uses the chiller to concentrate the cooling capacity, cools/heats the fresh air, mixes it with the return air, and sends it into the room. If there is no fresh air, only the return air will be heated/cooled.
The air duct system can be composed of multiple compressors and an air-cooled condenser. The indoor unit is composed of an evaporator and a circulating fan. The number of units is the same as that of the compressor, and the form is various, such as ceiling type. Hidden ceilings and so on. The system is characterized in that the condenser of the outdoor unit is air-cooled, and each compressor and the indoor unit are arranged one-to-one to form an independent system, and the connection between the condenser of the outdoor unit and the evaporator of the indoor unit can be up to 25 m. It is hidden that the ceiling machine (indoor unit) can be connected to the air duct and the air outlet can be evenly arranged indoors according to the indoor space. It can also be connected to the new air duct to introduce new air. The system completely relies on the refrigerant circulation to complete the air conditioning requirements. The function of the split type air conditioner has the air supply effect of the central air conditioner.
advantage:
1. Compared with other small central air conditioners for household use, the initial investment of ducted systems is relatively small;
2. The fresh air system improves air quality and improves human comfort.
Disadvantages:
1. The temperature of each room is not well adjusted separately;
2. The air duct occupies more space, about 100×200 square millimeters, and it needs to reduce its interference to the space through the decoration technique;
3, the outdoor temperature is too low to start, you need to increase the heating system.
Home central air conditioning: multi-line system
Multi-line system, ie refrigerant flow system. As the name suggests, it is a refrigerant system that uses compressed refrigerant as the transport medium. It uses a single compressor to drive multiple indoor units. The outdoor unit consists of external heat exchangers, compressors and other accessories. The indoor unit consists of a direct evaporative heat exchanger and a fan. The refrigerant is sent to the indoor unit through the tube routing outdoor unit, and the heat flux of different load holidays is met by controlling the flow rate of the refrigerant in the pipeline and the cooling flow rate entering the indoor radiator.
advantage:
1. The temperature of each room can be adjusted freely;
2. The pipeline takes up little space;
3, can meet the needs of different rooms, energy saving, thermal efficiency.
Disadvantages:
1. If the outdoor temperature is too low, it cannot be started. It is necessary to increase the heating system.
2. It is difficult to solve the problem of fresh air supply and winter humidification;
3. The cost is relatively high.
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