Automatic constant-temperature dehumidification device
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Solution Overview
Problem
Current heat pump systems for sludge drying face issues such as high operation costs, leakage of hot air and bad smells, inability to meet varying air volume, temperature, and humidity requirements, and occupy large spaces, making them inefficient and difficult to maintain.
Innovation Solution
An automatic constant-temperature dehumidification device with two sets of dehumidifying heat pump assemblies, each comprising primary and secondary refrigeration modules with specific condensers, evaporators, and compressors, along with an air module and regenerators, which allows for self-balanced temperature control, sealed operation, and separate air volume management to meet different drying stage requirements without external cooling sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If external air or water cooling is used for temperature adjustment during drying, then temperature control is achieved, but operation cost increases and leakage of hot air and bad smells occurs
Solution Approach 1:
The patent combines the cooling function with the dehumidification function by using the same heat pump system. The heat pump's evaporator serves dual purposes: dehumidifying the air while also providing cooling through its heat exchange capability, eliminating the need for separate cooling systems and preventing leakage issues
Solution Approach 2:
The patent introduces a regenerator as an intermediary component that recovers heat from the exhaust air and transfers it to the incoming air. This heat recovery mechanism reduces the cooling load and allows the system to maintain temperature control without direct external air/water cooling that causes leakage
2Temperature
If external air or water cooling is used for temperature adjustment, then temperature control is achieved, but operation cost increases
Solution Approach 1:
The patent recovers waste heat from the exhaust air stream using the regenerator and applies it to preheat the incoming fresh air. This heat recovery reduces the energy required for heating during different drying stages, significantly lowering operation costs while maintaining effective temperature control
Solution Approach 2:
The heat pump system is designed to perform multiple functions: dehumidification, cooling, and heat recovery. By making the system multi-functional, the patent eliminates the need for separate dedicated cooling equipment, reducing overall energy consumption and operation costs
3Device complexity
If a single heat pump assembly is used, then device structure is simple, but it fails to meet different air volume, temperature, and humidity requirements at different drying stages
Solution Approach 1:
The patent divides the drying system into distinct operational stages with different air handling requirements. The multi-set heat pump assembly allows independent control of each unit, enabling the system to provide different air volumes, temperatures, and humidity levels appropriate for each drying stage (constant temperature, falling rate, and equilibrium stages)
4Reliability
If traditional heat pump systems are used, then dehumidification is achieved, but they occupy large surface area and space for maintenance
Solution Approach 1:
The patent employs a compact modular design where components are nested within each other. The heat pump assemblies are arranged in a space-efficient configuration, and the regenerator is integrated into the existing air flow path, minimizing the overall footprint and reducing the space required for installation and maintenance
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
The device achieves efficient sludge drying with reduced operation costs, prevents smell leakage, and optimizes air volume, temperature, and humidity control, shortening the drying cycle and reducing space requirements, thus enhancing the overall dehumidification performance and modular design.
Implementation Method 1
each of the primary refrigeration module and the secondary refrigeration module comprises a condenser, an evaporator, and a compressor; in each of primary refrigeration module and the secondary refrigeration module of each of the two refrigerant modules, an outlet of the compressor is connected to an inlet of the corresponding condenser, an outlet of the condenser is connected to an inlet of the corresponding evaporator via an expansion valve
Implementation Method 2
A heat exchanger is provided between each evaporator and each corresponding compressor
Implementation Method 3
an outlet of the compressor is connected to an inlet of the corresponding condenser, an outlet of the condenser is connected to an inlet of the corresponding evaporator via an expansion valve
Implementation Method 4
The condenser of the primary refrigeration module of a first refrigerant module of the two refrigerant modules is a water condenser. The condenser of the primary refrigeration module of a second refrigerant module of the two refrigerant modules is an air condenser
Implementation Method 5
an air inlet duct of the air module is connected to a hot side of a corresponding regenerator disposed at each of the two refrigerant modules; the hot side of each regenerator is connected with the evaporator of the primary refrigeration module and the evaporator of the secondary refrigeration module of a corresponding refrigerant module via ventilation ducts
Implementation Method 6
each of the primary refrigeration module and the secondary refrigeration module comprises a condenser, an evaporator, and a compressor; in each of primary refrigeration module and the secondary refrigeration module of each of the two refrigerant modules, an outlet of the compressor is connected to an inlet of the corresponding condenser
Data Source
AI summary
An automatic constant-temperature dehumidification device, comprising at least two dehumidification heat pump assemblies having two refrigerant modules and an air module. The refrigerant module comprises a primary refrigerating module and a secondary refrigerating module, the primary refrigerating module and the secondary refrigerating module each comprising a condenser, an evaporator and a compressor. An air inlet pipe of the air module is connected to a hot side of a heat regenerator, the hot side of the heat regenerator is connected to the evaporators through ventilation pipes, the evaporators are connected to a cold side of the heat regenerator through ventilation pipes, and the cold side of the heat regenerator is connected to one of the condensers through a ventilation pipe.