High-temperature air conditioning unit
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Solution Overview
Problem
High-temperature air conditioning units face insufficient cooling of components like motors, frequency converters, and lubricating oil due to excessively high evaporation pressure, which prevents stable and reliable operation.
Innovation Solution
The air conditioning unit incorporates a throttling and cooling pipeline assembly with parallel medium-pressure and low-pressure pipelines, featuring throttle valves and a booster pipeline to regulate refrigerant pressure, ensuring low-pressure refrigerant for cooling components, and includes a boosting device to maintain efficient cycling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the evaporation temperature in the evaporator is increased for high-temperature refrigeration, then the refrigeration temperature is improved, but the pressure of the high-temperature and high-pressure liquid refrigerant becomes excessively high, causing insufficient cooling of components
Solution Approach 1:
The patent divides the single refrigerant stream into two separate streams: one stream (first throttle valve) maintains high pressure for the evaporator to achieve high-temperature refrigeration, while the other stream (second throttle valve) is throttled to low pressure specifically for cooling components. This segmentation allows different pressure levels to serve different functions simultaneously, resolving the contradiction between high evaporation temperature and low component cooling pressure.
Solution Approach 2:
The patent applies different pressure conditions to different parts of the system: the evaporator receives high-temperature and high-pressure refrigerant for high-temperature refrigeration, while the components (motor, frequency converter, lubricating oil) receive low-pressure refrigerant for effective cooling. This local differentiation of pressure quality enables each component to operate under its optimal pressure condition.
2Object-affected harmful factors
If the refrigerant pressure is reduced for component cooling, then the cooling effect is improved, but the refrigeration capability is worsened
Solution Approach 1:
The patent segments the refrigerant flow into two independent paths after the condenser: the first path through the first throttle valve maintains high pressure for the evaporator to ensure refrigeration performance, while the second path through the second throttle valve reduces pressure for component cooling. This segmentation ensures that reducing pressure for cooling does not compromise refrigeration capability.
Solution Approach 2:
The patent creates a multi-functional refrigerant distribution system where the refrigerant serves dual purposes: high-pressure refrigerant for temperature control in the evaporator and low-pressure refrigerant for heat dissipation in components. This multi-functionality allows the system to simultaneously achieve reliable refrigeration and effective component cooling.
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 configuration ensures effective cooling of components by maintaining low-pressure refrigerant in the low-pressure pipeline, addressing the issue of insufficient cooling and enabling stable operation in high-temperature refrigerating and heating pump units.
Implementation Method 1
the throttle valves are configured to enable a pressure of refrigerant in the low-pressure pipeline to be lower than a pressure of refrigerant in the medium-pressure pipeline
Implementation Method 2
components to be cooled are disposed in the low-pressure pipeline... effective cooling of components by maintaining low-pressure refrigerant
Implementation Method 3
an outlet of the low-pressure pipeline is connected to the booster pipeline, and an outlet of the booster pipeline is connected to the evaporator; a boosting device is arranged in the booster pipeline
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
Disclosed is a high-temperature air conditioning unit. By changing an arrangement mode of throttle valves (14, 15), a pressure of refrigerant inside a low-pressure pipeline is made to be lower than a pressure of refrigerant inside a medium-pressure pipeline, thus ensuring that the refrigerant, used for cooling components, inside the low-pressure pipeline has a low pressure, thereby solving a problem in the prior art that a frequency converter, a motor and lubricating oil are not cooled sufficiently or cannot be cooled due to excessively high evaporation pressure.