Single-stage compressor and energy system using the same
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Solution Overview
Problem
Conventional single-stage injection-type compressors experience efficiency decreases due to intermediate-pressure injection occurring near suction pressure, limiting their capability and efficiency.
Innovation Solution
A single-stage compressor design with an intermediate-pressure valve that controls the supply of intermediate-pressure working fluid to an injection port, spaced apart from the suction port, allowing injection at an optimal intermediate pressure, enhancing efficiency and capability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If injection occurs near suction pressure in a conventional single-stage compressor, then the structure is simple, but efficiency and capability decrease
Solution Approach 1:
The compressor is divided into multiple compression stages with intermediate injection capability. The compression process is segmented into first and second compression sections, allowing intermediate-pressure fluid to be injected between stages, thereby improving efficiency while maintaining reasonable structural complexity
Solution Approach 2:
The injection port is positioned at a different spatial location than conventional designs, specifically at intermediate pressure rather than near suction pressure. This dimensional change in pressure positioning enables efficient intermediate-pressure injection while maintaining structural feasibility
2Device complexity
If injection occurs near suction pressure, then the device complexity is low, but capability and efficiency are limited
Solution Approach 1:
The injection system incorporates a controllable intermediate-pressure valve that dynamically responds to pressure differences. The valve body slides based on pressure differential between the compression chamber and injection port, enabling adaptive control of intermediate-pressure injection to optimize capability without excessive complexity
Solution Approach 2:
An intermediate-pressure valve serves as a mediator between the compression chamber and injection port. This valve component enables controlled intermediate-pressure injection by responding to pressure differences, thereby enhancing compressor capability while maintaining manageable device complexity
3Measurement precision
If intermediate-pressure valve controls fluid supply, then injection pressure accuracy improves, but valve structure complexity increases
Solution Approach 1:
The intermediate-pressure valve is designed to automatically respond to pressure differences without external control systems. The valve body slides open or closed based on the natural pressure differential between the compression chamber and injection port, achieving accurate pressure-controlled injection while minimizing control system complexity
Solution Approach 2:
The valve structure utilizes pressure differential as the controlling parameter. When the pressure difference between the compression chamber and injection port exceeds a threshold, the valve body slides to open the flow path; otherwise, it remains closed. This parameter-based control achieves precise injection pressure regulation with simple valve structure
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
The solution improves the efficiency and capability of single-stage compressors by injecting intermediate-pressure fluid at the correct pressure, leading to enhanced performance and allowing for flexible pressure settings, making it suitable for various compressor types and energy systems like heat pumps and air-conditioning systems.
Implementation Method 1
configured to slide due to a pressure difference between first pressure and the second pressure
Implementation Method 2
an elastic object placed in the first space, having one side supported at an inside surface of the valve housing and the other side elastically supporting one side of the valve body and having an elastic force corresponding to the intermediate pressure
Data Source
AI summary
A single-stage compressor including one compressing unit, includes: a housing having a compressing chamber formed therein and including a suction port, which is located in one side of the compressing chamber and into which a working fluid enters, and an injection port, which is located on the compressing chamber to be spaced apart from the suction port by a predetermined distance and into which an intermediate-pressure working fluid is injected; and an intermediate-pressure valve installed on an intermediate-pressure fluid flow path on which the intermediate-pressure working fluid moves and configured to control supply of the intermediate-pressure working fluid so that the intermediate-pressure working fluid is supplied to the injection port in response to an intermediate pressure of the compressing chamber. In the injection-type compressor having a single chamber, a working fluid is injected at an intermediate pressure (not in the proximity of a suction pressure) so that efficiency and capability of the injection-type compressor having a single chamber can be improved. The injection-type compressor having a single chamber has a simple structure and is easily manufactured so that a pressure of an injection port and a corresponding intermediate pressure can be selectively set in various ways.