Commercial Dryer Heat Pump Layout for High Capacity at Lower Cost
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Solution Overview
Problem
Commercial drying devices require high heating and cooling capacities due to short program times for large quantities of items, necessitating custom-made, costly heat pumps, whereas household dryers use inexpensive mass-produced units suitable for longer cycles.
Innovation Solution
A device with a heat pump system comprising at least two mass-produced heat pump units in parallel, where process air flows through all units, allowing for adjustable air distribution and control, enabling efficient energy utilization and fail-safe operation by using conventional, inexpensive components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If custom-made heat pumps are used to provide high heating and cooling capacities for commercial drying devices, then the required heating and cooling performance is achieved, but the device cost increases significantly
Solution Approach 1:
The heat pump system is divided into multiple independent heat pump units (first heat pump unit, second heat pump unit, etc.), each capable of operating independently. This segmentation allows the use of smaller, mass-produced units instead of requiring a single large custom-made unit, thereby reducing costs while maintaining the required total heating and cooling capacity for commercial drying applications
Solution Approach 2:
Multiple heat pump units are combined in parallel to achieve the required total heating and cooling capacity. The units work together to provide the high power output needed for commercial drying, while each individual unit can be a standardized, mass-produced component, thus resolving the contradiction between high power requirements and cost reduction
2Ease of manufacture
If mass-produced heat pumps are used in commercial drying devices, then device cost is reduced, but the heating and cooling capacity is insufficient for short program times
Solution Approach 1:
The system uses multiple independent heat pump units instead of a single unit. Each unit can be a standard mass-produced model with moderate capacity, but when operated in parallel, their combined heating and cooling capacity meets the high power demands of commercial drying applications requiring short program times
Solution Approach 2:
The heat pump units are designed to be universally applicable, using standardized components that can be mass-produced. The modular design allows these universal units to be scaled by quantity rather than requiring custom engineering, thus achieving both cost reduction and sufficient capacity through parallel operation
3Device complexity
If a single heat pump unit is used, then the system is simpler, but the system reliability decreases due to single point of failure
Solution Approach 1:
The heat pump system is segmented into multiple independent units with separate refrigerant circuits. This segmentation creates redundancy, so that if one unit fails, the other units can continue to operate, thereby improving system reliability without requiring an overly complex integrated design
Solution Approach 2:
The system is designed with redundant heat pump units as a form of prior cushioning against failures. This redundancy is built into the system architecture from the beginning, allowing continuous operation even when individual units fail, thus improving reliability without excessive complexity
4Reliability
If multiple heat pump units are operated in parallel, then system reliability and capacity are improved, but the control complexity increases
Solution Approach 1:
The control system is designed to be dynamic and adaptive, automatically adjusting the operation of individual heat pump units based on system requirements. The control device can selectively activate or deactivate units and adjust refrigerant distribution, simplifying the overall control complexity while maintaining reliability through intelligent management of multiple units
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration allows for cost-effective operation with optimal energy use, extended equipment life, and flexible program control, reducing energy consumption and extending device lifespan while maintaining efficient drying performance.
Implementation Method 1
the process air is cooled in a condensation device and dehumidified in the process
Implementation Method 2
the process air is cooled in a condensation device and dehumidified in the process
Implementation Method 3
Thermal energy is released in the condenser, with which the process air is heated
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The invention relates, among other things, to a device for drying goods, in particular a commercial clothes dryer (1), a commercial dishwasher or a cleaning and disinfection machine, comprising a chamber for receiving goods to be dried, a process air supply in which process air is heated by means of a heating device and then supplied to the chamber, and then extracted from the chamber and subsequently cooled and dehumidified in a condensation device, and a heat pump device in which refrigerant is circulated via an evaporator (51), a compressor (52), a condenser (53) and a throttle (54) or capillary, wherein the condensation device comprises the evaporator (51) and the heating device comprises the condenser (53).In order to make mass-produced heat pumps usable and thus save costs, it is proposed that the heat pump system consist of at least two heat pump units (B).