Air Conditioner Bypass Defrosting for Continuous Heating Capacity
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Solution Overview
Problem
Existing air-conditioning devices face issues with frosting and defrosting during heating operations, leading to reduced heating performance and user discomfort, as the indoor unit cools down during defrosting and the divided outdoor unit defrosting method results in slow defrosting and attenuated heating capacity.
Innovation Solution
A continuous heating control system utilizing a bypass pipeline with a defrosting solenoid valve and a heating structure at the gas separator, allowing high-temperature refrigerant to directly heat the outdoor and indoor heat exchangers without switching the four-way valve, maintaining continuous heating and fast defrosting through hot air bypass and gas separation technology.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the air-conditioning device performs heating operation, then heating performance is provided, but frosting occurs on the outdoor heat exchanger which reduces heating performance
Solution Approach 1:
The system performs preliminary defrosting actions by controlling the defrosting solenoid valve to open and allowing high-temperature refrigerant to flow through the bypass pipeline to the outdoor heat exchanger before the frosting severely impacts heating performance. The heating structure at the gas separator also provides preliminary heating to prevent frosting accumulation.
Solution Approach 2:
A bypass pipeline with a defrosting solenoid valve is introduced as an intermediary pathway, allowing high-temperature refrigerant to directly reach the outdoor heat exchanger for defrosting without following the normal refrigeration cycle. This intermediary pathway enables simultaneous heating and defrosting operations.
2Object-affected harmful factors
If traditional defrosting method is used with four-way valve switching, then defrosting is achieved, but heating capacity is attenuated and user comfort is reduced
Solution Approach 1:
The refrigerant flow path is segmented into multiple pathways: the normal refrigeration cycle path and a separate bypass defrosting path. The bypass pipeline with defrosting solenoid valve creates an independent defrosting channel that operates simultaneously with the heating function, avoiding the need to switch the four-way valve and maintain continuous heating capacity.
Solution Approach 2:
The heating structure at the gas separator and the bypass defrosting system enable continuous heating operation during defrosting. High-temperature refrigerant continuously flows through the bypass pipeline to the outdoor heat exchanger for defrosting while the indoor unit continues to provide heating, eliminating the interruption of heating service.
3Object-affected harmful factors
If divided outdoor unit defrosting method is used, then defrosting is performed, but defrosting time is prolonged and heating capacity is reduced
Solution Approach 1:
The bypass pipeline acts as an intermediary high-temperature pathway that directly delivers hot refrigerant from the compressor to the outdoor heat exchanger, bypassing the low-temperature evaporator section. This intermediary path significantly accelerates the defrosting process by providing concentrated high-temperature heat directly where needed.
Solution Approach 2:
The defrosting heat is locally concentrated at the outdoor heat exchanger through the bypass pipeline, providing high-temperature refrigerant precisely where the frosting occurs. This localized high-temperature application accelerates defrosting compared to general system-wide temperature changes.
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 solution ensures no attenuation of heating capacity and fast defrosting, maintaining indoor heating comfort by directly guiding high-temperature refrigerant for defrosting and heating, thus avoiding the need for four-way valve switching and prolonging defrosting time.
Implementation Method 1
a heating structure arranged at a bottom of a gas separator and configured to heat the gas separator
Implementation Method 2
When the air-conditioning device is in a heating operation, a refrigerant in an outdoor heat exchanger evaporates and absorbs heat
Implementation Method 3
a refrigerant in an outdoor heat exchanger evaporates and absorbs heat, which may result in frosting on the outdoor heat exchanger
Implementation Method 4
a heating structure arranged at a bottom of a gas separator and configured to heat the gas separator
Data Source
AI summary
A continuous heating control system and method, and an air-conditioning device. The system includes a defrosting solenoid valve (1) arranged on a bypass pipeline, wherein one end of the bypass pipeline is connected to an oil separator (2), and the other end of the bypass pipeline is connected to an outdoor heat exchanger (3); and a heating structure which is arranged at the bottom of a gas separator (4) and used for heating the gas separator (4).