Comparison of advantages and disadvantages of air duct machine, water chiller and multi-line

Comparison of advantages and disadvantages of air duct machine, water chiller and multi-line 1. Ducting machine-Ducting system

　　 duct type system, as its name implies, uses air as the conveying medium. It uses chillers to centrally produce cold energy, cools/heats the fresh air, mixes it with the return air, and sends it indoors. If there is no fresh air, only the return air is heated/cooled. The outdoor air duct system can consist of multiple compressors and one air-cooled condenser. The indoor unit is composed of evaporators and circulating fans. The number of units is the same as the number of compressors, and there are many types such as ceilings. Hidden ceiling, etc.

　　 1. Working principle:

The principle of refrigeration is the same as that of household cabinets, using compressors and Fuli Subarum for refrigeration. The difference is that the home cabinets heat exchanger (evaporator) is in the room, and the hot air is sucked in from the air inlet and cooled by the heat exchanger. After sending out cold wind. The evaporator of the air duct machine is outside the room. The evaporator cools the air through a wind box, and then concentrates the cold air to each room through the air duct.

　　2, advantages:

　　 Compared with other small household central air-conditioning types, the initial investment of the air duct system is smaller. The fresh air system improves air quality and human comfort.

　　 3. Disadvantages:

　　1) The wind pipe installation requires high requirements, requires heat preservation performance, and good sealing performance. Such as heat preservation, poor sealing can easily cause water leakage, and loss of cooling capacity, which increases the power consumption of the entire unit.

　　 2) If you do not do the electronic control part, as long as you open any tuyere in the room, the entire outdoor machine will run at full speed. The operating cost is higher.

　　3) If the wind system is not properly designed (the wind pressure is too small), the temperature of each room may not meet the design requirements. The return air design is difficult. Such as improper design is easy to produce noise. The overall noise (wind noise) is too loud.

　　4) The air ducts are used in various rooms and the ceiling is required to be concealed. Sometimes the lintels may be damaged. Restricted by floor height, home decoration and ceiling.

　　5) Large cooling capacity loss, resulting in increased power consumption.

　　Ⅱ、Water cooler

　　The delivery medium of cold/hot water unit is usually water or glycol solution. It generates air-conditioning cold/hot water through the outdoor host, which is delivered to each indoor terminal device by the pipeline system, where the cold/hot water and indoor air exchange heat to generate cold/hot air, thereby eliminating the room air conditioning load. It is a form of air conditioning system that centrally generates cold/heat and disperses the load of each room. The terminal device of the cold/hot water unit is usually a fan coil.

　　 1. Working principle:

Similar to the domestic cabinet machine, the difference is that outside the room, the water or glycol solution is cooled by the evaporator in the water tank, and then sent to each room through the water pipe. The cold water is then carried out by the fan disk in the room through the fan and indoor hot air. Hot and cold exchange. The chilled water system consists of a chilled pump, water make-up valve, water tank, anti-air valve, balance valve and circulating water pipeline.

　　2, advantages:

　　1) Low running noise, but also your comfortable and quiet environment.

　　2) High temperature control accuracy, constant temperature, no cold or hot phenomenon, good comfort.

　　3) It is easy to coordinate and cooperate with the interior decoration, reflecting the elegant style.

　　4) The operating cost of this machine is low, even if it is only used in one room, because of the water temperature control switch, the downtime is long and no electric energy is wasted.

　　 3. Disadvantages:

　　1) High requirements for water system installation and heat preservation must be performed by a professional team to prevent water leakage.

　　 2) The material requirements of the water pipe are high, and PP-R pipe is recommended.

　　3) Each room has higher requirements for water pressure, and the system design should be professional.

　　4) Maintenance is troublesome. In the north, water is released every winter, and water is added the next spring.

　　5) The heating effect is not good.

　　 Three, multi-online system (one for multiple)

　　 Even the refrigerant flow system. As the name suggests, it is a refrigerant system. It uses compressed refrigerant as the transport medium and uses one compressor to drive multiple indoor units. The outdoor host is composed of an outside heat exchanger, a compressor and other accessories. The indoor unit consists of a direct evaporative heat exchanger and a fan.

　　 1. Working principle:

Similar to the domestic cabinet machine, but the external machine adopts a frequency conversion compressor, and an external machine can connect several to dozens of internal machines at the same time. The internal machine can be a household hanging machine, a cabinet machine, a ceiling machine, a fan coil, and other refrigerant type air conditioners. The main difference of the system is: the compressor of this system adopts frequency conversion speed regulation for control, and the internal machine adopts electronic expansion valve. When the system is under low load, the external machine reduces the compressor speed through the inverter controller, and the internal machine reduces the refrigerant flow of the internal machine through the electronic expansion valve, so that the whole machine is in a state of low power consumption. When the system is under high load, the external machine increases the speed of the compressor through the inverter controller, and the internal machine increases the refrigerant flow of the internal machine through the electronic expansion valve. The whole machine runs at full speed, reducing the indoor temperature in a short time.

　　2, advantages:

　　1) Low running noise, but also your comfortable and quiet environment.

　　2) High temperature control accuracy and constant temperature.

　　3) Because of the inverter compressor, the temperature of each room can be adjusted freely. More personal.