Fully automatic control logic of the system: The refrigeration system is divided into cold units, chilled water pump groups, cooling water pump groups, tower fan groups, and air conditioning boxes. Each group contains multiple corresponding devices. When the system is put into full automatic operation, the system starts according to the timer, tower fan group, cooling water pump group, chilled water pump group, refrigeration unit, and the opposite is true when shut down. When a device in the group stops or fails unexpectedly, the system will automatically run the idle devices in the group and sound a buzzer alarm. The equipment in the group starts and stops according to the running time. The equipment with short running time is started first, and the equipment with long running time is shut down first.
1. Intelligent control of cold machines: According to the relationship between the specific heat capacity and temperature of water, according to the temperature and humidity requirements of the workshop, enter System fully automatic control logic: The refrigeration system is divided into cold units, chilled water pump groups, cooling water pump groups, tower fan groups , and air conditioning boxes. Each group contains multiple corresponding devices. When the system is put into full-automatic operation, the system starts according to the timer, tower fan unit, cooling water pump unit, chilled water pump unit, refrigeration unit, and the opposite is true when shutting down. When a device in the group stops or fails unexpectedly, the system will automatically run the idle devices in the group and issue a buzzer alarm. The equipment in the group starts and stops according to the running time. The equipment with short running time is started first, and the equipment with long running time is shut down first. The optimal outlet water temperature control of the chiller; the optimal cooling supply and return water temperature difference and variable flow control according to the operating load of the chiller; the optimal operation control according to the operating efficiency of the chiller;
2. Chilled water pump group control: while ensuring that the water supply pressure is greater than the set low value, adjust the water pump frequency according to the current supply and return water temperature difference, flowmeter.
3. Cooling water pump group control: while ensuring that the water supply pressure is greater than the set low value, adjust the frequency according to the current load of the chiller and the cooling water supply and return water temperature.
4. Tower fan unit control: According to the current ambient temperature and humidity, as well as the historical outlet water temperature, calculate the current appropriate outlet water temperature value, automatically adjust the fan frequency and the number of openings, automatically reduce the outlet water temperature in energy-saving mode, improve the heat exchange efficiency of the chiller, set the outlet water temperature protection threshold, and avoid equipment surge caused by too low cooling water temperature.
5. Precision air conditioning control: According to the indoor ambient temperature and humidity, automatically adjust the operation of the refrigeration system and air handling system, and realize real-time variable frequency adjustment control of precision air conditioning.