Product Introduction
Product Introduction:
Cabinet dimensions: 800*2000*400 (W*H*D), protection class IP30. Two 150*150 cooling fans are equipped on the left and right sides of the upper end of the cabinet to ensure effective heat dissipation of the cabinet. This product is custom-made for users, with a built-in frequency converter (for frequency conversion start of air-conditioning supply fans), switching power supplies for various weak current equipment, PLC host required for the control system, analog input/output modules, digital input/output modules, etc. This power distribution cabinet can meet the following system requirements:
Cabinet dimensions: 800*2000*400 (W*H*D), protection class IP30. Two 150*150 cooling fans are equipped on the left and right sides of the upper end of the cabinet to ensure effective heat dissipation of the cabinet. This product is custom-made for users, with a built-in frequency converter (for frequency conversion start of air-conditioning supply fans), switching power supplies for various weak current equipment, PLC host required for the control system, analog input/output modules, digital input/output modules, etc. This power distribution cabinet can meet the following system requirements:
1. Display of main system operating parameters: fan operating status, fresh air temperature and humidity, air supply volume, temperature, humidity and positive pressure value of the service area corresponding to each air-conditioning system, pressure difference and alarm of filters at all levels, and opening degree of each valve.
2. An electric proportional-integral regulating valve is installed on the fresh air duct, which automatically adjusts the opening degree of the fresh air valve according to the indoor relative pressure difference signal of the service area of the air-conditioning system to maintain stable pressure in the service area. The valve opening can be adjusted on-site and remotely.
3. Equipped with a temperature and humidity control system, which can set and control indoor temperature, humidity and relative outdoor pressure difference, and is equipped with a control cabinet and control valves for air, water and steam circuits.
- Summer: Based on the deviation between the indoor relative temperature and the set value, PID control is performed according to the comparison result to adjust the opening degree of the electric regulating valve on the return water pipe of the front surface cooling section, so that the indoor relative temperature tends to the set value; According to the deviation between the indoor temperature and the set value, through an appropriate algorithm, PID control is performed according to the comparison result to adjust the opening degree of the electric regulating valve on the return water pipe of the rear surface cooling section, so that the indoor temperature tends to the set value.
- Winter: Based on the deviation between the fresh air temperature and the set value, PID control is performed according to the comparison result to adjust the opening degree of the electric regulating valve on the return water pipe of the front heating section, so that the fresh air temperature tends to the set value; According to the deviation between the indoor temperature and the set value, through an appropriate algorithm, PID control is performed according to the comparison result to adjust the opening degree of the electric regulating valve on the return water pipe of the rear heating section or rear surface cooling section, so that the indoor temperature tends to the set value; According to the deviation between the indoor relative humidity and the set value, through an appropriate algorithm, PID control is performed according to the comparison result to adjust the opening degree of the electric regulating valve of the rear steam humidification section, so that the indoor relative humidity tends to the set value.
- Summer: Based on the deviation between the indoor relative temperature and the set value, PID control is performed according to the comparison result to adjust the opening degree of the electric regulating valve on the return water pipe of the front surface cooling section, so that the indoor relative temperature tends to the set value; According to the deviation between the indoor temperature and the set value, through an appropriate algorithm, PID control is performed according to the comparison result to adjust the opening degree of the electric regulating valve on the return water pipe of the rear surface cooling section, so that the indoor temperature tends to the set value.
- Winter: Based on the deviation between the fresh air temperature and the set value, PID control is performed according to the comparison result to adjust the opening degree of the electric regulating valve on the return water pipe of the front heating section, so that the fresh air temperature tends to the set value; According to the deviation between the indoor temperature and the set value, through an appropriate algorithm, PID control is performed according to the comparison result to adjust the opening degree of the electric regulating valve on the return water pipe of the rear heating section or rear surface cooling section, so that the indoor temperature tends to the set value; According to the deviation between the indoor relative humidity and the set value, through an appropriate algorithm, PID control is performed according to the comparison result to adjust the opening degree of the electric regulating valve of the rear steam humidification section, so that the indoor relative humidity tends to the set value.
4. Temperature and humidity measuring points and pressure difference measuring points are set in the area served by the unit, and the measured values are transmitted to the central control room.
5. The filter is equipped with a pressure difference alarm. The alarm pressure values of filters at all levels are: primary filter: 100 Pa; medium efficiency filter: 160 Pa; high efficiency filter: 200 Pa.
6. The control box enables the start/stop, operating status, valve status and air temperature and humidity of the air-conditioning unit to be displayed in the control room.
7. For the proportional-integral regulating valve at the fresh air inlet, it will be interlocked and closed when the temperature after the preheating coil is too low. The front surface cooling section of the air-conditioning unit does not work in winter. To ensure system safety, the chilled water pipeline system should be completely emptied before winter. The electric valve of the preheating coil of the air-conditioning unit is set with a minimum opening degree and cannot be completely closed, so as to ensure that there is hot water passing through the coil and protect the subsequent coils.