Electrical Control Cooling in Air Conditioners Using One-Way Throttle Valves
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Solution Overview
Problem
Variable frequency air conditioners face challenges with heat dissipation in high temperature environments, leading to reduced compressor operation frequency and compromised cooling effectiveness, while existing heat dissipation methods can result in condensation issues and reduced reliability.
Innovation Solution
The air conditioner employs a series connection of one-way throttle valves between the outdoor and indoor heat exchangers, allowing for effective heat dissipation of the electrical control element, reducing temperature, and minimizing condensation, with a heat dissipation subassembly that includes a heat dissipation pipe and casing for enhanced cooling efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If air convection heat dissipation is used for the electrical control system, then the structure is simple, but the heat dissipation effect is poor under high temperature environment
Solution Approach 1:
The patent introduces a coolant as an intermediary substance to transfer heat from the electrical control system. The coolant flows through a heat dissipation channel in contact with the electrical control system, absorbing heat and transporting it to the outdoor heat exchanger, thereby solving the poor heat dissipation effect under high temperature environments while maintaining system reliability
Solution Approach 2:
The patent employs a liquid coolant flowing through hydraulic channels to achieve heat dissipation. The coolant circulation system uses fluid dynamics to transport thermal energy from the electrical control system through the heat dissipation channel to the outdoor heat exchanger, providing efficient cooling under high temperature conditions
2Temperature
If low temperature coolant is used for heat dissipation, then the cooling effect is improved, but condensation water is produced and temperature drops too much
Solution Approach 1:
The patent uses dynamic control through one-way throttle valves that automatically adjust coolant flow based on system conditions. The throttle valves are positioned to control coolant flow into the indoor and outdoor heat exchangers, dynamically preventing condensation by ensuring proper flow direction and timing, thereby avoiding excessive cooling and condensation water production
Solution Approach 2:
The one-way throttle valve mechanism provides automatic feedback control of coolant flow. The valves respond to pressure and flow conditions in the refrigeration cycle, automatically regulating coolant delivery to heat exchangers to prevent conditions that would cause condensation, thus eliminating the harmful effect without sacrificing cooling effectiveness
3Temperature
If compressor operation frequency is decreased to reduce heat production, then the electrical control system temperature is controlled, but the cooling effect and user comfortability are greatly affected
Solution Approach 1:
The patent extracts the heat dissipation function from the refrigeration cycle by introducing a separate coolant circulation system. The coolant independently absorbs heat from the electrical control system and transports it to the outdoor heat exchanger, allowing the compressor to operate at high frequency for maximum cooling effect while the electrical control system is cooled separately without affecting productivity
Solution Approach 2:
The outdoor heat exchanger serves multiple functions: it acts as both the condenser for the refrigeration cycle and the heat dissipation device for the electrical control system. The coolant transfers heat from the electrical control system to the outdoor heat exchanger, which then dissipates it to the environment, enabling the same component to handle both refrigeration and electrical cooling demands simultaneously
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 improves the stability and performance of the air conditioner by maintaining high compressor operation frequency, reducing condensation, and enhancing cooling efficiency, even in high temperature conditions, while simplifying the structure and reducing production costs.
Implementation Method 1
a heat dissipation subassembly for heat dissipation of the electrical control element
Implementation Method 2
a metal cooling fin dissipates heat through air convection
Implementation Method 3
a first one-way throttle valve including a first valve port and a second valve port, in which the first valve port is connected to the second end of the outdoor heat exchanger and the second valve port is connected to the heat dissipation subassembly
Data Source
AI summary
An air conditioner (100), comprising a compressor (110), a reversing assembly (120), an outdoor heat exchanger (130), an indoor heat exchanger (140), an electric control heat sink assembly (150), a first unidirectional throttle valve (160) and a second unidirectional throttle valve (160′). The electric control heat sink assembly (150) comprises an electric control component (151) and a heat dissipation assembly (152). The first unidirectional throttle valve (160), on the flow direction from a first valve port (161) to a second valve port (162), is completely turned on. On the flow direction from the second valve port (162) to the first valve port (161), the first unidirectional throttle valve (160) is a throttle component. The second unidirectional throttle valve (160′), on the flow direction from a third valve port (161′) to a fourth valve port (162′), is completely turned on. On the flow direction from the fourth valve port (162′) to the third valve port (161′), the second unidirectional throttle valve (160′) is a throttle component.