Air conditioning system using heat pump and air heating device
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Solution Overview
Problem
Existing air conditioning systems using heat pumps in cold environments face issues with frost formation, inefficient heating due to defrost modes, and potential damage from overheated refrigerants, leading to increased reliance on gas/air heating devices and uneven heating.
Innovation Solution
An air conditioning system incorporating a heat pump, an air heating device that heats water using fuel combustion, and an intermediate heat exchanger to exchange heat between refrigerant and water, with a controller managing load distribution to prevent compressor damage and ensure stable heating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the heat pump operates in defrost mode to remove frost, then frost is removed from the heat pump, but heating performance deteriorates and the heating load on the gas/air heating device increases
Solution Approach 1:
The patent introduces an intermediate heat exchanger as a mediator between the heat pump and the air heating device. During defrost mode, the intermediate heat exchanger transfers heat from the air heating device to the heat pump, enabling frost removal while maintaining heating performance through the air heating device's fuel combustion system.
2Productivity
If the heat pump operates in heating mode after defrost mode, then heating is provided, but the overheated refrigerant damages the compressor
Solution Approach 1:
The patent implements preliminary cooling action by controlling the intermediate heat exchanger to cool the refrigerant before it enters the compressor. When switching from defrost mode to heating mode, the system预先 activates the intermediate heat exchanger to reduce refrigerant temperature, preventing compressor damage from overheated refrigerant.
3Productivity
If the gas/air heating device is used to provide heating, then heating load is met, but uniform heating is difficult to achieve
Solution Approach 1:
The patent merges the heating functions of two different systems: the heat pump provides base heating through refrigerant circulation, while the air heating device supplements with fuel combustion heating. This combined approach distributes heat more uniformly throughout the space, overcoming the limitation of using either system alone.
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 system prevents heat pump damage, ensures stable heating, and achieves uniform temperature distribution by optimizing load distribution between the heat pump and air heating device, enhancing overall heating efficiency.
Implementation Method 1
an intermediate heat exchanger provided to exchange heat between the refrigerant and the water
Implementation Method 2
an air heating device provided to burn a fuel so as to heat circulating water
Data Source
AI summary
Provided is an air conditioning system. The air conditioning system includes a heat pump provided to heat or cool a circulating refrigerant, an air heating device provided to burn a fuel so as to heat circulating water so that air is heated by the heated water, and an intermediate heat exchanger provided to exchange heat between the refrigerant and the water.