一种用于制冷机组的喷液补气管路结构及制冷机组
By using a single pipeline in the refrigeration unit to simultaneously achieve liquid injection cooling and economizer gas replenishment, combined with throttling devices and sensors, and optimizing the pipeline layout, the complex connection and leakage problems in the refrigeration unit are solved, improving the system's reliability and refrigeration efficiency, adapting to different load requirements, and realizing waste heat recovery.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- MCQUAY AIR CONDITIONING & REFRIGERATION WUHAN
- Filing Date
- 2025-07-25
- Publication Date
- 2026-07-17
AI Technical Summary
The existing refrigeration units have complex designs and connections for the liquid injection cooling pipeline and the economizer gas supply pipeline, which increases manufacturing costs and leakage risks, and makes it difficult to optimize system performance.
A single pipeline is used for both liquid injection cooling and economizer gas replenishment. By combining a throttling device and sensors, the pipeline layout is optimized, reducing connecting parts and sealing nodes, and achieving multi-stage compression and heat recovery.
Reduce manufacturing costs and leakage risks, improve system reliability and cooling efficiency, enhance cooling capacity and flexibility, adapt to different load requirements, and achieve efficient and stable operation and waste heat recovery.
Smart Images
Figure CN224517076U_ABST
Abstract
Claims
1. A liquid injection gas supplementing pipe structure for a refrigeration unit, characterized by: It should include at least a condenser and an economizer; The condenser outlet is provided with two parallel pipelines. The first pipeline is connected to the hot side inlet of the economizer, and the second pipeline is connected to the cold side inlet of the economizer through the first connecting pipe for liquid injection and gas replenishment. A throttling device is arranged on the first connecting pipe for liquid injection and gas replenishment, and upstream of the cold side inlet of the economizer, along the gas flow direction. Downstream of the cold-side outlet of the economizer, the second pipeline is connected to the compressor's gas inlet via a second liquid injection gas inlet connecting pipe.
2. The liquid injection and gas replenishment pipeline structure for a refrigeration unit according to claim 1, characterized in that: On the first connecting pipe and located upstream of the cold side inlet of the economizer, the throttling device consists of a solenoid valve and an expansion valve arranged sequentially along the gas flow direction.
3. The liquid injection and gas replenishment pipeline structure for a refrigeration unit according to claim 1, characterized in that: A check valve is installed on the second connecting pipe along the direction of gas flow.
4. The liquid injection and gas replenishment pipeline structure for a refrigeration unit according to claim 1, characterized in that: Multiple compressors are connected in series, and each compressor is equipped with a separate economizer. Each compressor is connected to its corresponding economizer through a first pipeline and a second pipeline.
5. The liquid injection and gas replenishment pipeline structure for a refrigeration unit according to claim 1, characterized in that: In the direction of the hot side outlet of the economizer, the first pipeline is connected to the evaporator through the main liquid supply valve, and the evaporator is connected to the working chamber of the compressor.
6. The liquid injection and gas replenishment pipeline structure for a refrigeration unit according to claim 1, characterized in that: Multiple evaporators are connected in parallel between the main liquid supply valve and the compressor.
7. The liquid injection and gas replenishment pipeline structure for a refrigeration unit according to claim 1, characterized in that: A flow regulating valve, a pressure sensor, and a temperature sensor are installed on the first and second connecting pipes.
8. The liquid injection and gas replenishment pipeline structure for a refrigeration unit according to claim 1, characterized in that: A filter and dryer were added to the compressor's air inlet.
9. The liquid injection and gas replenishment pipeline structure for a refrigeration unit according to claim 1, characterized in that: A pipeline is installed at the condenser outlet to connect to a heat recovery heat exchanger.
10. A refrigeration unit characterized by The liquid injection and gas replenishment pipeline structure for refrigeration units described in any one of claims 1-9 is adopted.