How to safely use central air conditioners in offices and homes during the epidemic?

“Due to the recent outbreak of the new coronavirus, everyone is very concerned about the ventilation safety of central air conditioning. Central air conditioners are mainly divided into two types: buildings and residences according to the application.

“

Due to the recent outbreak of the new coronavirus, everyone is very concerned about the ventilation safety of central air conditioning. Central air conditioners are mainly divided into two types: buildings and residences according to the application.

1. Central air conditioning in the building – mainly divided into all-air system, all-water system and all-cooling media system

What is a full air system?

Basically, it is more common in building air conditioners. Generally, the combined air conditioner box (AHU for short) is sent to each room through the air duct, and then mixed with the incoming fresh air through the unified return air duct and sent back to the AHU for reprocessing. ; This kind of system is what we usually call the “big pot rice” system, “full opening”, and the air sent to each room is processed and provided by this AHU. Once there is a virus in a room, it is very likely to be sent to other rooms through this type of air conditioning system, resulting in cross-infection. Therefore, such air conditioners must be turned off during the epidemic.

What is a full water system?

Generally, the fan coil unit in each room performs independent cooling and heating treatment, and the fresh air is delivered by an independent fresh air system. The all-water system is slightly better than the all-air system. The cold and heat of each fan coil is exchanged with the main unit through the cold and warm water pipes, so from the indoor side room alone, it is not easy to cause cross infection when this type of air conditioner is turned on. However, it is still necessary to ensure that enough fresh air is introduced to ensure the circulation of indoor air and avoid crossover within a single room.

What is a full refrigerant system?

The cooling and heating of each room is performed by an independent indoor unit, and each indoor unit exchanges heat with the outdoor unit module where it is located through a closed refrigerant circuit. Therefore, whether it is indoor or outdoor, a refrigerant system is not only independent, but also has a relatively small unit capacity, so the risk of infection is extremely low. The fresh air is also delivered by an independent fresh air system. A brand new fan with cold and heat treatment can be used to deliver fresh air to the room and exhaust it through doors and windows to ensure indoor ventilation. A full heat exchange fresh air system can also be used in a single space to achieve heat recovery from cooling and heating, to meet the comfort of fresh air and reduce energy consumption.

2. Residential central air-conditioning – the most important form is the household water machine system and the refrigerant system

The household water machine system can be understood as the mini version of the above all-water system, and the refrigerant system can be understood as the mini version of the above-mentioned all-refrigerant system. Therefore, users with central air conditioners in their homes have no problem turning on the air conditioners for heating during the epidemic. Each room is an independent device, and there is no problem of cross infection. Then, what we need to remind you most is the issue of fresh air. No matter which form of central air conditioner is used, the premise of being able to turn on is to ensure indoor air circulation. The fresh air is the most effective device for solving air circulation in addition to opening windows for ventilation, especially when there are problems such as cooling, noise, and dust along the road outside. Opening windows for ventilation is a big problem. And fresh air equipment is a way to have the best of both worlds. There are several common forms of fresh air in the current household central air conditioning market.

One is the fresh air system for the whole house. Daikin’s total heat exchanger belongs to this type of product. It is a two-way ventilation system that introduces fresh air from the outside and discharges the indoor exhaust gas, and also installs a filter device. If you install this system in your home, please use it with confidence. It can not only effectively ventilate and ventilate, but also effectively filter external pollution through the filter device to purify the indoor air of your home.

The second is more representative of the local fresh air. Installing a fresh fan in a room can meet the fresh air ventilation requirements of the room, and can also realize the ventilation and purification and filtration of the room. It is very suitable for users who have not installed fresh air in the original decoration, but want to add it later. If users who have adopted this type of fresh air, please feel free to turn on your equipment.

Daikin Corner Guard’s surface-mounted fresh air purification system can achieve the effect of three-in-one effect of introducing fresh air, exhaust gas, and indoor purification, so that renovated houses can also fall in love with “Zhai” homes.

The third type is that there is no fresh air system in the home, and the window can only be opened every once in a while for ventilation. But if you really can’t open windows at home, you can only use air purifiers to circulate the indoor air. Although it can only play an auxiliary role, it cannot replace opening windows for ventilation, but something is better than nothing. The principle of the device is to purify the indoor air through continuous indoor circulation filtration, just like a sieve, which continuously filters out pollutants in the air. Of course, when choosing, try to choose some air purification that can decompose bacteria and viruses. It can improve the indoor air environment and provide us with a relatively clean indoor environment.

During the epidemic, everyone must do a good job in the air protection of the office environment and the air environment of the home, to tide over the difficulties together!