Electric Control Box Refrigerant Cooling for High-Temperature AC Operation
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Solution Overview
Problem
Air conditioners face poor heat dissipation at high temperatures, affecting the service life and reliability of electric control boxes and limiting the operating frequencies of variable frequency air conditioners.
Innovation Solution
Incorporating a heat dissipation coolant pipe within the electric control box, connected to both the outdoor condenser and indoor evaporator, which uses electronic expansion valves and throttle valves to manage coolant flow, ensuring timely heat removal and preventing condensation, thereby enhancing reliability and allowing high operating frequencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If air cooling is used for the electric control box, then the structure is simple, but the heat dissipation effect is poor at high temperatures
Solution Approach 1:
A heat dissipation coolant pipe is introduced as an intermediary substance (refrigerant) to transfer heat from the electric control box to the outdoor condenser. The coolant pipe acts as a thermal conduit, allowing efficient heat removal without direct air contact, thereby solving the poor heat dissipation problem at high temperatures while maintaining system reliability.
Solution Approach 2:
The patent utilizes the refrigerant circulation system (pneumatic/hydraulic principle) to achieve heat dissipation. The refrigerant flows through the heat dissipation coolant pipe, absorbing heat from the electric control box components and transporting it to the outdoor condenser, where it is released to the environment, providing effective cooling at high temperatures.
2Productivity
If variable frequency air conditioner operates at high frequencies, then cooling capacity increases, but heat dissipation becomes insufficient at high temperatures
Solution Approach 1:
The heat dissipation coolant pipe is pre-installed within the electric control box, with the refrigerant circulation path established before high-frequency operation begins. This preliminary arrangement ensures that when the air conditioner operates at high frequencies, the cooling system is already in place to immediately remove heat, preventing temperature buildup that would limit operating frequency.
3Temperature
If heat dissipation is improved using refrigerant cooling, then temperature control improves, but device complexity increases
Solution Approach 1:
The patent merges the heat dissipation function with the existing refrigerant circulation system of the air conditioner. The heat dissipation coolant pipe is integrated into the refrigerant circuit, utilizing the same refrigerant that already circulates through the compressor and condenser. This consolidation avoids adding a separate cooling system, thereby improving temperature control without significantly increasing device complexity.
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 effectively lowers the temperature of electric control boxes, improves the service life and reliability of air conditioners, and enables variable frequency air conditioners to operate at high frequencies and power outputs even at high temperatures, meeting user requirements.
Implementation Method 1
a heat dissipation coolant pipe 14 arranged in an electric control box 13... timely removing heat generated by the electric control box
Implementation Method 2
which uses electronic expansion valves and throttle valves to manage coolant flow
Data Source
Figure 1~2
Figure 3~4
AI summary
Provided are an air conditioner control method and device, and an air conditioner. The air conditioner comprises an outdoor condenser, an indoor evaporator, a first electronic expansion valve, a throttle valve and a heat dissipation coolant pipe provided in an electric control box. The outdoor condenser is connected with a first end of the heat dissipation coolant pipe via the first electronic expansion valve. The indoor evaporator is connected with a second end of the heat dissipation coolant pipe via the throttle valve. The first electronic expansion valve is used to throttle a coolant in a heating mode. The throttle valve is used to throttle the coolant in a cooling mode. The air conditioner control method and device, and the air conditioner of the present invention employ a heat dissipation coolant pipe to dissipate heat from an electric control box of an air conditioner, thereby timely removing heat generated by the electric control box, lowering element temperatures, and improving the reliability and service life of the air conditioner. The invention enables a variable frequency air conditioner to operate at a high operating frequency and reach high output power efficiency under high temperatures, thereby maximizing advantages of the variable frequency air conditioner, and meeting user requirements.