The office central air conditioner has improved the traditional air conditioning and refrigeration technology. It adopts the liquid refrigeration principle to expand the refrigeration range. Compared with other refrigeration systems, the office central air conditioner has obvious advantages:
. First: the cooling is uniform and comfortable, and the office central air conditioner is better than the household one. Air conditioners have greater indoor temperature control capabilities. Generally, split-type air conditioners will shut down when the indoor temperature reaches the set temperature, and then restart the refrigeration system when the indoor temperature fluctuates by more than 2°C. The human body will feel obvious discomfort when the temperature fluctuates by more than 1°C. Office central air conditioners can balance the indoor temperature. The temperature fluctuates within 0.5℃, making the overall experience more comfortable.
Second: Space saving and beautiful appearance; the installation position of the office central air conditioner is hidden inside the ceiling, so it can save the installation space of the air conditioner hanger and cabinet unit. In addition, the air vents set in the suspended ceiling can better match the interior decoration, and have more controllability and multilaterality during installation, making the interior decoration more fashionable.
Third: low failure rate and long life; the life of ordinary split air conditioners is 5-10 years, and the average life of central air conditioners is about 20 years. It is much larger than split air conditioners . At the same time, the failure rate of office central air conditioners is much lower than that of split air conditioners. Many of them do not start to gradually experience failure problems until the end of their lifespan.
Fourth: is more energy efficient and energy-saving than ; the office central air conditioner adopts a one-to-many installation mode, which reduces the number of outdoor units of the air conditioner. At the same time, the air conditioner frequency conversion balance also further enhances its energy saving. Compared with System air conditioners and office central air conditioners consume less energy, and the energy saving effect is more obvious after long-term use.
1. Current status of office central air-conditioning maintenance
The main advantages of office central air-conditioning in my country are saving operating costs and higher efficiency of automatic adjustment. Although central air-conditioning has many advantages, due to its own system, Routine maintenance and upkeep are essential. Routine maintenance and upkeep are mainly to further extend the service life of the office central air conditioner and make full use of its value. At present, the main application of office central air conditioners in our country is basically that it can clearly define the maintenance and upkeep of air conditioners. Usually, it is divided into three categories: overhaul, preventive maintenance and maintenance. However, in the process of repair and maintenance, common practices are usually based on routines, including routine inspections, technical training, improvement needs, and failures. Processing, value-added services, parts replacement, cleaning, accessories updates, system upgrades, etc.
2. Maintenance and maintenance of the office central air-conditioning system
The office central air-conditioning system is mainly composed of the air-conditioning system, the host computer and the terminal equipment. There are many ways to maintain the system. Here we focus on three aspects: the water system, the refrigeration host computer and the terminal equipment. A brief discussion on how to maintain and maintain:
(1) Water system maintenance and maintenance Office central air conditioners are used repeatedly in the circulation system. Due to the rise in water temperature and evaporation, soluble substances in the water are continuously concentrated. The pool of cooling tower is polluted by wind, sun, rain and various external environments, which is more serious than the sediment produced by direct-flow cooling water and closed cooling water systems. Corrosion of equipment and a large number of microorganisms causes pipes to become clogged with mud and dirt, leading to an increasing trend of scaling and corrosion in the cooling system, posing hidden dangers to production safety. To this end, concentrated water must be discharged and fresh water and water treatment chemicals must be replenished to maintain horizontal balance and stable water quality.
In order to ensure the long-term safety and energy-saving operation of the equipment and effectively control the corrosion, scaling and harm of biological clay in the water system, water treatment for office central air conditioning is carried out. Office central air conditioning water system treatment can be divided into physical cleaning and chemical cleaning according to whether chemicals are used. Cleaning mainly uses electronic equipment to treat water quality. The main methods include electrolysis method , ultrasonic method, etc. Environmental friendly.For example, the cooling tower cleaning can use high-pressure water gun to flush the inner wall of the cooling tower to remove moss and rust in the tower, thereby reducing the entry of dirt into the condenser , protecting the host equipment and improving the work efficiency of the host. Chemical cleaning mainly performs water treatment by adding chemical reagents. Commonly used chemical reagents include zinc sulfate , polyacrylic acid , etc. These agents dissolve quickly in water and react quickly with dirt. Achieve the effect of removing dirt. The water quality conditions in different regions are different, so the selection of chemical reagents should be adjusted accordingly according to the local water quality conditions.
For example, condenser cleaning mainly involves adding acidic chemical reagents to clean the scale in the copper tubes of the heat exchanger of the unit to prevent clogging. After cleaning, the cooling performance and cooling effect of the system are greatly improved, and energy consumption is reduced. Reduce equipment failures. Water treatment of office central air conditioners has practical significance and practical value for improving the cooling effect of central air conditioners, saving energy, inhibiting equipment corrosion, and extending the service life of the unit.
(2) Host maintenance and maintenance The office central air conditioner is composed of compressor , evaporator , condenser and refrigerant (refrigerant). It is an important part of the office central air conditioning system. The host is combined with the core technology of office central air conditioning. The maintenance and upkeep effect of the main unit directly determines the stability of the air conditioning system. Qualitativeness and longevity.
The maintenance and upkeep of the office central air conditioning host mainly includes the following contents:
(1) Check whether the compressor operating current, operating sound, working voltage, and oil level color are normal;
(2) Check whether the water flow protection switch is working normally;
(3 ) Check whether the air switch of air conditioner is normal; AC contactor , thermal protector are good;
(4) Check the computer board
(5) Check the air conditioner host, the high and low pressure of the refrigerant refrigerant are normal, no Leakage, need to replenish refrigerant;
(6) Check the phase sequence protector of the air conditioner main engine. Under normal circumstances, under the condition of missing phase , terminal is not loose
(7) Clean the scale on the condenser and evaporator regularly to ensure that the condenser and evaporator are clean and improve the heat conversion efficiency.
(3) Terminal equipment maintenance and maintenance
The terminal equipment of office central air-conditioning mainly refers to the ventilation system, including air ducts, fresh air ducts, central air-conditioning air hoods, air exhaust outlets, air handling units, fan coils , etc. The wind system works for a long time, and the dust in the air duct cannot provide air. The temperature and humidity environment in the air duct promotes the growth of a large number of bacteria and microorganisms to form infectious diseases; various infectious disease pathogens can easily cause cross-infection between groups through the air circulation system. A large amount of dust accumulates in the air ducts and filters. This will lead to increased wind resistance, reduced unit capacity, and energy loss. Therefore, the air system should be cleaned regularly during daily repair and maintenance to ensure that the system is clean. The main maintenance contents include: cleaning the return air filter, cleaning the heat exchanger fins, cleaning the centrifugal impeller, and bearing repair and replacement. 2. Check whether the air volume and outlet temperature of the fan coil outlet are normal, clean the air outlet, and remove dust from the return air.
Office central air-conditioning equipment and its systems are relatively expensive assets. To effectively play the role of air conditioning, make it operate efficiently, safely and economically, daily maintenance is essential; regular maintenance can eliminate hidden dangers, reduce accidents, reduce operating costs, and extend The service life of the equipment ensures the normal working time of and .
