Three-Cylinder Variable-Capacity Compressor for Low-Temperature Heating
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Solution Overview
Problem
Conventional double-stage enthalpy increasing compressors have poor adaptability to operating conditions, especially at low temperatures, leading to a significant decline in heating capacity and energy efficiency due to fixed displacement and inability to adjust the number of working cylinders.
Innovation Solution
A rolling rotor-type three-cylinder double-stage compressor with variable capacity, where the number of working cylinders can be flexibly adjusted through sliding sheets and control devices, allowing for different operational modes to optimize cylinder usage based on load conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a conventional double-stage enthalpy increasing compressor is employed to improve heating capacity at low temperature, then the heating capacity is improved, but the energy efficiency under normal working conditions declines significantly
Solution Approach 1:
The patent applies the dynamics principle by making the compressor capacity adjustable through variable displacement mechanisms. The compressor can dynamically change its operating mode between different stages (single-stage and double-stage) and adjust displacement ratios based on ambient temperature conditions. This allows the system to operate at optimal efficiency under normal conditions while providing enhanced heating capacity when low temperature operation is required.
2Temperature
If the displacement of a conventional double-stage enthalpy increasing compressor is fixed to ensure heating capacity at low temperature, then the heating capacity is improved, but the adaptability to operating conditions becomes poor
Solution Approach 1:
The patent implements dynamics by enabling the compressor to dynamically switch between different operating modes including single-stage compression and double-stage enthalpy increasing compression. The system can adjust its displacement ratio and stage configuration in real-time based on ambient temperature and load conditions, providing excellent adaptability across varying operating environments while maintaining adequate heating capacity at low temperatures.
3Temperature
If electrically auxiliary heating is employed to improve heating capacity, then the heating capacity is improved, but the energy efficiency becomes low
Solution Approach 1:
The patent applies mechanics substitution by replacing the electrical auxiliary heating system with a mechanical solution - the double-stage enthalpy increasing compression mechanism. This mechanical approach uses the compressor's own compression work to achieve heating, eliminating the need for separate electrical heating elements and thereby improving overall energy efficiency while maintaining adequate heating capacity.
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 design enhances the compressor's adaptability to varying conditions, improving energy efficiency during normal operations and significantly increasing heating capacity at low temperatures by adjusting the number of active high-pressure stage cylinders.
Implementation Method 1
a first sliding sheet is provided in the first sliding sheet slot, the second high-pressure stage cylinder has a second sliding sheet slot, and a second sliding sheet is provided in the second sliding sheet slot
Implementation Method 2
a low-pressure stage cylinder, a first high-pressure stage cylinder, and a second high-pressure stage cylinder are stacked
Implementation Method 3
double-stage enthalpy increasing compressor
Data Source
AI summary
A compressor includes a low-pressure stage cylinder, a first high-pressure stage cylinder and a second high-pressure stage cylinder which are stacked, a partition is arranged between each two adjacent cylinders, the first and second high-pressure stage cylinders are both situated at a same side of the low-pressure stage cylinder or respectively situated at two sides of the low-pressure stage cylinder, the lower flange is situated below the low-pressure stage cylinder, the first high-pressure stage cylinder and the second high-pressure stage cylinder. A first sliding sheet is provided in the first high-pressure stage cylinder, a second sliding sheet is provided in the second high-pressure stage cylinder, and a third sliding sheet is provided in the low-pressure stage cylinder. The first and the second high-pressure stage cylinders are arranged in parallel, and the first and second high-pressure stage cylinders arranged in parallel are connected to the low-pressure stage cylinder in series.