Introduction of the new air unit
The new air unit is an air conditioning equipment to provide fresh air. Function according to the requirements of the use of the environment can achieve constant temperature and humidity or simply provide fresh air. The working principle is to extract fresh air from the outdoors after dust removal, dehumidification (or humidification), cooling (or warming) and other processing through the fan sent to the indoor space when entering the indoor space to replace the original indoor air. Of course, the functions mentioned above have to be based on the needs of the use of the environment to determine, the more complete the cost is higher.
In order to protect the indoor air quality, the indoor space is equipped with a centralized fresh air system, and the supply of fresh air and fresh air treatment of the host is known as fresh air unit.
The working principle of the new air unit
1, the temperature control system of the new air unit is composed of a proportional-integral temperature controller, temperature sensors installed in the air supply pipe and motorized control valve. The controller's role is to be placed in the air supply duct temperature sensor detected by the air supply temperature transmitted to the temperature controller and the controller to set the temperature comparison, and according to the results of PI algorithm, the temperature controller to the electric valve to open/close the valve signal, so as to make the air supply temperature to maintain the required range.
2, electric control valve and fan chain to ensure that cut off the power supply fan valve is also closed at the same time. Electric control valve can also realize the linkage with the fan (as shown in the figure dotted line box), when the fan cuts off the power to close the electric control valve. The above figure in the two chain line connection, respectively, for power failure reset equipment and electric shutdown equipment, the user can according to the specific circumstances of their own choice. (There are anti-freezing requirements of the occasion can be through the trip limiter will keep the hot water valve position in the required degree of opening).
3, in need of refrigeration, the thermostat is placed in refrigeration mode, when the temperature measured by the sensor reaches or is lower than the set temperature, the thermostat gives a shut-off signal to the electric valve, and the shut-off contact of the electric valve closes the valve. If the measured temperature does not reach the set temperature, the thermostat gives an open signal to the motorized valve, and the open contact of the motorized valve opens the valve. When heating is required, the thermostat is placed in the heating mode, when the temperature measured by the sensor reaches or is higher than the set temperature, the thermostat gives the motorized valve a shut-off signal, and the shut-off contact of the motorized valve turns on and closes the valve. If the measured temperature does not reach the set temperature, the thermostat gives an open signal to the motorized valve, and the open contact of the motorized valve opens the valve.
4, when the filter is clogged or when it exceeds the specified value, the differential pressure switch gives the switch signal.
5, when the coil temperature is too low, low-temperature anti-freezing switch gives a switch signal, the fan stops running to prevent the coil from freezing.
New air unit manufacturer introduction
1, Guangdong Westinghouse Kanda Air Conditioning Co., Ltd, Westinghouse Kanda, new air ventilator, all-heat new air ventilator combined air conditioning unit, professional processing and customization, can be used in schools, hotels, offices and other areas. Starting batch quantity is at least five units, the market price is $4400.00/unit.
2, Shenzhen Jinhuali Refrigeration Equipment Co., Ltd, provides processing and customization services, supplying Shenzhen ceiling fresh air unit, ceiling air cabinet, temperature control range of 18-25 degrees Celsius, the main use of regional medicine. Starting batch is at least four units, market price is 4600.00RMB/unit.
3, Jingjiang City, Qixing air-conditioning equipment manufacturing limited company, supply fresh air unit, provide customized processing, the unit shell for the iron shell fan material. Starting lot of at least five units, the market price is 1600.00 yuan / unit.
4, Xiamen Zhonghui Air Conditioning Co., Ltd, ceiling-type fresh air unit, ceiling-type fresh air unit with heat recovery, heat recovery fresh air system, provide processing and customization, the main function of ventilation and air exchange, energy recovery, with cooling and heating. Starting lot of at least four units, market price is $4,900.00/unit.
5, Shanghai Hengbiao Air Conditioning Equipment Co., Ltd, roof type fresh air ventilation regulator, high static pressure duct unit, can be customized, cooling capacity of 3000. starting batch of at least eight, the market price of 998.00 yuan / unit.