Independent Temperature-Humidity Air Conditioning With Dual Cooling Loops

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Solution Overview

Problem

Conventional air conditioning systems control temperature and humidity in combination, leading to inefficient cooling units, energy wastage, and issues like mildew due to poor humidity control, making them costly and inefficient, especially in terms of energy savings.

Innovation Solution

A temperature and humidity independent control air conditioning system comprising a high temperature cooling unit, a low temperature cooling unit, a humidity processing unit, and an indoor unit, where coolant temperatures are regulated and exchanged between these units to optimize temperature and humidity control, with a control unit managing flow rates based on indoor requirements.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If conventional air conditioning systems control temperature and humidity in combination, then both temperature and humidity are controlled simultaneously, but cooling unit performance deteriorates and energy consumption increases

Engineering Contradiction:
Improvetemperature and humidity controlVSAvoidenergy consumption
Core Design Contradiction:
Ease of operationVSLoss of energy

Solution Approach 1:

The system divides temperature control and humidity control into separate independent loops. The temperature control unit handles only sensible heat through a temperature control valve, while the humidity control unit handles only latent heat through an expansion valve. This segmentation allows each unit to operate independently at optimal efficiency, avoiding the energy waste of simultaneous combined control.

Inventive Principle:
Principle #1Segmentation

2Ease of operation

If conventional air conditioning systems control temperature and humidity in combination, then both parameters are adjusted together, but cooling unit efficiency decreases

Engineering Contradiction:
Improvetemperature and humidity controlVSAvoidcooling unit efficiency
Core Design Contradiction:
Ease of operationVSProductivity

Solution Approach 1:

The system segments the cooling function into two independent units: a temperature control unit with a temperature control valve for sensible heat removal, and a humidity control unit with an expansion valve for latent heat removal. This segmentation enables each unit to maintain optimal operating conditions independently, significantly improving cooling unit efficiency compared to combined control.

Inventive Principle:
Principle #1Segmentation

3Device complexity

If conventional air conditioning systems use combined temperature and humidity control, then system complexity is reduced, but humidity control precision deteriorates leading to stagnant water and mildew

Engineering Contradiction:
Improvesystem structureVSAvoidhumidity control precision
Core Design Contradiction:
Device complexityVSManufacturing precision

Solution Approach 1:

The system implements separate control loops for temperature and humidity, with the humidity control unit dedicated exclusively to dehumidification through expansion valve control. This segmentation ensures precise humidity control independent of temperature fluctuations, preventing stagnant water accumulation and mildew growth, while the overall system structure remains manageable through modular design.

Inventive Principle:
Principle #1Segmentation

4Adaptability or versatility

If separate temperature and humidity control systems are implemented, then independent control is achieved, but system complexity and installation cost increase

Engineering Contradiction:
Improveindependent control capabilityVSAvoidsystem structure
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The system merges the temperature control unit and humidity control unit into a single integrated air conditioning system that shares common components such as the compressor, condenser, and evaporator. The temperature control valve and expansion valve operate in parallel within the same refrigerant circuit, enabling independent control of temperature and humidity while avoiding the complexity of completely separate systems.

Inventive Principle:
Principle #5Merging (Combining)

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 system achieves efficient independent control of temperature and humidity, reducing energy consumption and preventing issues like mildew, while being cost-effective in both installation and operation.

Implementation Method 1

coolant with a first temperature provided by the high temperature cooling unit, after flowing into the indoor unit, becomes coolant with a second temperature; coolant with a third temperature provided by the low temperature cooling unit, after flowing into the humidity processing unit, becomes coolant with a fourth temperature

Methodology Applied
Scientific EffectHeat exchange: Heat Exchanger

Data Source

PatentUS9618272B2Temperature and humidity independent control air conditioning system and method
Publication Date: 2017.04.11 CARRIER CORP
  • US9618272B2 patent drawing
  • US9618272B2 patent drawing
  • US9618272B2 patent drawing

AI summary

This invention provides a temperature and humidity independent control air conditioning system, comprising a high temperature cooling unit, a low temperature cooling unit, a humidity processing unit, and an indoor unit, wherein the coolant with a first temperature provided by the high temperature cooling unit flows into the indoor unit and then its temperature becomes a second temperature; the coolant with a third temperature provided by the low temperature cooling unit flows into the humidity processing unit; the coolant with the second temperature is divided to the low temperature cooling unit. With this invention, temperature and humidity independent control can be realized with high efficiency.