Heat-Pump Dryer Temperature Control for Quiet, Lower-Power Drying

The patent applies dynamics by making the operating parameters of the compressor and drying air fan variable rather than fixed. The control unit continuously monitors the temperature of the heat pump system and dynamically adjusts the rotational speeds of the compressor and drying air fan accordingly. During phases when the heat pump temperature is within optimal ranges, higher speeds are used to maximize drying efficiency. When temperatures approach threshold values, the speeds are reduced or temporarily stopped to prevent overheating, thereby dynamically balancing productivity with noise reduction and thermal management.

The patent implements periodic action through cyclic operation patterns of the compressor and drying air fan. The control unit creates alternating phases of high-speed operation (for productivity) and low-speed or stopped operation (for noise reduction and temperature management). This periodic modulation allows the system to achieve effective drying over time while significantly reducing continuous noise emission and power consumption, particularly during night or silent modes.

The system dynamically adjusts the power consumption of the compressor and drying air fan based on real-time temperature monitoring. By varying the rotational speeds according to the heat pump system's thermal state, the patent optimizes energy usage - operating at high power only when necessary for effective drying, and reducing power consumption when thermal conditions allow or when energy savings are prioritized (e.g., night mode).

The patent changes the operational parameters (rotational speed, power input) of the compressor and drying air fan based on the temperature parameter of the heat pump system. The control unit modifies these parameters in response to temperature threshold detections, thereby adapting the energy consumption profile to match actual drying needs and thermal conditions, reducing overall power consumption while maintaining acceptable drying productivity.

The patent implements feedback control by continuously monitoring the temperature of the heat pump system and using this information to adjust the operation of the compressor and drying air fan. The control unit receives temperature data and feeds it back into the control algorithm, which then modifies operational parameters to maintain temperature within safe ranges. This closed-loop feedback mechanism prevents temperature from rising to dangerous levels while still allowing efficient drying operation within the safe thermal window.

The system applies beforehand cushioning by proactively reducing or stopping the compressor and drying air fan before the temperature reaches critical threshold values. The control unit is configured with temperature thresholds that trigger preventive action, cushioning against potential abnormal compressor conditions by avoiding excessive temperature rises in the first place, rather than reacting after problems occur.

The patent uses periodic action by implementing intermittent operation of the compressor rather than continuous or completely stopped operation. The control unit creates cycles where the compressor operates at high speed for drying efficiency, then reduces or stops to reduce noise and power consumption. This periodic pattern allows the system to achieve acceptable drying progress over time while significantly reducing average noise emission and energy usage, particularly during night or silent drying modes.

The system applies partial action by deactivating the compressor temporarily rather than continuously, accepting that some drying function is reduced during these periods. The control unit strategically selects when to partially deactivate the compressor (when temperature thresholds are approached or during night mode) to achieve noise and energy savings, understanding that the overall drying process continues at a reduced rate during these intervals.