RUIDONG Commercial Air Conditioning Rooftop Packaged Units

RUIDONG Commercial Air Conditioning Rooftop Packaged Units

The increasing number of extreme weather events and the rising demand for intelligence have focused the core needs of commercial buildings for air conditioning systems on four major directions: high efficiency and energy saving, intelligent control, scenario customization, and green and low-carbon. These needs are specifically differentiated based on building types, usage scenarios, and environments. For example, it is necessary to achieve precise temperature and humidity control according to different functions such as offices, hospitals, and shopping malls to ensure a comfortable environment; at the same time, it should be able to adapt to load fluctuations caused by passenger flow and seasons, and have dynamic adjustment capabilities to cope with extreme weather.

Among the mainstream commercial air conditioning units, rooftop packaged units occupy an important position due to their unique advantages.

A rooftop packaged unit is a large - scale air conditioning equipment that integrates core components such as compressors, condensers, evaporators, and fans into one body and is directly installed on the roof of a building. Compared with split - type commercial air conditioning units, it can be combined with fan coils, air handlings and other equipment, which can not only adapt to building structure restrictions but also ensure indoor beauty. Compared with chiller units, its installation and maintenance are more convenient, which can significantly reduce related costs.

Figure 1- Ruidong rooftop packaged unit series 18kw-360kw

Core Components of Commercial Air Conditioning Rooftop Packaged Units:

1. Compressor: The "heart" of the air conditioner, responsible for compressing refrigerants (such as R410A, R407C, etc.) and driving the refrigeration cycle.

2. Condenser: Exchanges heat with outdoor air and dissipates the heat of the refrigerant to the outside (in cooling mode).

3. Evaporator: Exchanges heat with indoor return air / fresh air to achieve air cooling and dehumidification (cooling mode) or heating (heating mode, which needs to be combined with electric heating or heat pump function).

4. Fan system: Including supply fans and exhaust fans, responsible for sending the treated air into the room and exhausting part of the return air / fresh air. Among them, evaporator fan motors come in two types: centrifugal and EC direct-drive variable-frequency motors.

(1) Centrifugal motor: It makes air flow through the action of centrifugal force, with a relatively traditional structure. It can generate high pressure during air transportation, and is suitable for occasions that require long - distance air supply or have large system resistance. Its motor speed is usually fixed, and the air volume is changed by adjusting the air valve, etc., so the energy consumption is relatively high.

(2) EC direct - drive inverter motor: Adopting electronic commutation technology, it can directly realize variable frequency speed regulation and accurately adjust the air volume according to actual needs. Compared with centrifugal motors, it has a higher energy efficiency ratio, lower energy consumption, lower operating noise, and higher control precision. It can be seamlessly connected with the unit's control system to achieve intelligent operation.

5. Filter device: Common ones include primary filters, which can filter large particles of dust, hair, etc.; medium - efficiency filters, which can capture fine dust and some microorganisms; high - efficiency filters (such as HEPA), which are suitable for places with high requirements for air cleanliness and can filter fine pollutants such as PM2.5; some are also equipped with activated carbon filters to absorb odors and harmful gases and improve air purification effects.

6. Control system: Equipped with an RS485 interface, which can be connected to other equipment for centralized control.

Figure 2 - 260kW Rooftop packaged unit structure diagram

Figure 3 - 260kW Rooftop packaged unit equipped with EC direct-connect inverter motor

Advantages of Commercial Air Conditioning Rooftop Packaged Units

1. Saving indoor space: All components are installed on the roof, without occupying the indoor use area of shopping malls, offices, etc., which is especially suitable for buildings with limited floor height or compact layout.

2. Convenient installation and maintenance: With an integrated design, on - site installation only requires connecting air ducts and power supplies, and the construction period is short; during maintenance, there is no need to enter the room, and operations can be directly carried out on the roof, reducing interference to users.

3. Strong adaptability: A single unit has a wide range of cooling / heating capacity, which can meet the needs of commercial places of different scales; at the same time, it supports modular combination to flexibly match load changes.

4. Reasonable energy consumption control: The unit can be equipped with frequency conversion technology, heat recovery function, etc., which can adjust the operating power according to the indoor load to reduce energy consumption; the ratio of fresh air to return air can be adjusted to balance energy saving and comfort. In particular, units using EC direct - drive inverter motors perform more excellently in energy consumption control.

Figure 4 - Multiple Protections for Rooftop Packaged Units

Typical Application Scenarios of Commercial Air Conditioning Rooftop Packaged Units

1. Large shopping malls / supermarkets: With open spaces and dense passenger flow, they require large cooling capacity and fresh air volume. Rooftop packaged units can centrally process air and cooperate with air ducts for uniform air supply. If the air supply distance is long and the system resistance is large, units with centrifugal motors are more suitable; if there are high requirements for energy consumption and noise control, units with EC direct - drive inverter motors are better.

2. Office buildings / office towers: There is a high demand for layered or zoned control. Multiple units can be linked to meet the temperature requirements of different floors without occupying office indoor space. Such places are more sensitive to operating noise and energy consumption, and units with EC direct - drive inverter motors can better meet the needs.

3. Hotels / catering places: Need to take into account cooling, heating and ventilation. Some units support humidity control, which can improve the comfort of guest rooms and banquet halls. The guest room area has high requirements for noise, so units with EC direct - drive inverter motors are more applicable; while for some large banquet halls with large air supply system resistance, units with centrifugal motors are also a good choice.

4. Industrial plants / warehouses: Some production workshops or warehouses need a constant temperature and humidity environment (such as electronic factories, food warehouses). Rooftop packaged units can cooperate with air ducts to achieve precise temperature control. According to the air supply distance and system resistance of the plant, units with corresponding motor types can be selected.

Figure 5 - Partial application scenarios

Founded in 2011, Ruidong Group Co., Ltd. boasts over 14 years of experience in central air-conditioning and ventilation equipment, specializing in design, production, sales, installation and maintenance. We offer customized services, meeting T3 working conditions, and use world-renowned compressors and electrical components to ensure high quality.

For more info, visit our website or contact us via the details there.