Based on years of experience in textile air-conditioning system design, Aijin Company has developed a software package specifically tailored for textile air-conditioning systems. This package boasts fully independent intellectual property rights and is seamlessly integrated with Germany’s Beckhoff embedded PCs as well as imported high-precision industrial-grade temperature and humidity transmitters, damper actuators, and other peripheral control devices. Combined with its latest EtherCAT 100 Mbps technology, this system enables remote, distributed control of multiple air-conditioning zones, effectively reducing users’ costs associated with controllers and bus infrastructure.

The control system relies on a variety of advanced and rational algorithms. While ensuring highly precise temperature and humidity control, it employs multiple measures to continuously and uninterruptedly maintain the air-conditioning system at its optimal energy-saving state around the clock, offering unparalleled advantages over manual operation.

1. PM2.5 monitoring linked with the fresh-air filtration system, enabling automatic switching and selection of the fresh-air passage.

2. Automatic switching between power frequency and variable frequency;

3. Positive and negative pressure control: The differential pressure controller is integrated with the dust filtration equipment and the supply fan for unified interlocked control.

4. Switching between bypass valve mode and humidity-priority mode;

5. Enthalpy-based energy-saving control;

6. Monitoring and control of water levels in trenches;

7. The air conditioning system is equipped with a dedicated server and connected to the company’s ERP system.

8. Absolute moisture content control for even more convenient control of re-wetting rate;

9. Independent control of temperature and humidity in multiple zones with varying dew points. Typically, the industry adopts equal-dew-point control. However, based on user needs, Aijin Company has developed specialized programs and logical algorithms for sophisticated control systems that handle varying dew points.

10. B/S architecture system.

For example:

For a certain size and environmental combination air conditioning system—(single dew point, variable air volume, combined return air, with secondary return air).

The monitoring devices at the execution level mainly include the following 14 items (for reference only):

(1) Variable-frequency drive control for all fans

Automatic airflow adjustment

(2) Variable-frequency control of water pumps

The spray water volume is automatically adjusted. The variable-frequency drive (VFD) for the water pump should be used in conjunction with a VFD for the fan and electric dampers, employing a three-level sequential control strategy to achieve optimal energy savings. During the humidification process in the workshop: First, the damper is automatically opened wider; when the humidity fails to meet the required level, the water pump is then activated and its speed is increased; finally, the fan speed is raised. During the dehumidification process: The fan speed is first reduced; if the humidity still does not meet the requirements, the water pump speed is subsequently lowered and the pump is eventually stopped; only at this stage is the damper opening adjusted. The energy savings achieved by using a variable-frequency drive for the water pump are significant. For non-VFD pumps in high-speed spray chambers, a VFD-equipped pump can save up to 64% of energy; for non-VFD pumps in low-speed spray chambers, a VFD-equipped pump can save more than 70% of energy. It is crucial that the water pump’s VFD operation be governed by precise enthalpy-based control—rather than manual adjustment—and that the control adapts dynamically to the annual variations in the water-to-air ratio. Only in this way can energy savings be maximized.

(3) New air temperature and humidity probe

Calculate the enthalpy of the fresh air.

(4) All dampers are equipped with actuators for automatic adjustment.

The opening degree of the self-regulating damper.

(5) Temperature and humidity probes in the workshop

Measure the temperature and relative humidity within the workshop, with relative humidity taking priority for control. It is also possible to measure the absolute humidity in the workshop and control the absolute moisture content therein. This probe is installed solely for the purpose of controlling the temperature and humidity of the overall environment.

(6) Temperature and humidity probes in the small-environment supply air duct

It is generally installed in the main supply air duct of a small environment.

(7) Temperature and humidity probe at the air supply outlet in the most unfavorable location of the microenvironment airflow (optional)

Test the temperature and humidity above the warp yarn surface.

(8) Pressure sensor in the small-scale environmental air duct

After the loom stops, the air vents close, and the signal from the pressure sensor causes the blower to reduce its airflow.

(9) Pressure sensors in the workshop (optional)

Maintain a slightly positive pressure within the workshop.

(10) Temperature sensor after the spray chamber

Test the air temperature after spraying and compare it with the dew point temperature.

(11) Temperature sensor after the return air fan

Calculate the enthalpy of the return air.

(12) Actuator for the small environmental air supply outlet

It can be linked with the machine to automatically close the air supply outlet, and it can also—