A subway train air conditioning unit with an exhaust air subcooler

A technology for air conditioning units and subcoolers, which is applied to subcoolers, refrigerators, refrigeration components, etc., can solve the problems of poor heat exchange effect of heat exchangers, low refrigeration efficiency of units, and size limitations, and achieve enhanced heat exchange effects. , Improve operational reliability and refrigeration efficiency, reduce the effect of condensing pressure

Inactive Publication Date: 2018-06-26
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing air-conditioning units of subway trains, the exhaust air in the compartment is directly discharged to the outdoor environment through the exhaust fan and air duct, which results in a huge waste of cooling capacity
In addition, the size of the air-conditioning unit for subway trains is strictly limited, the heat transfer effect of the heat exchanger is poor, and the cooling efficiency of the unit is low

Method used

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  • A subway train air conditioning unit with an exhaust air subcooler

Examples

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Embodiment 1

[0023] A subway train air conditioning unit with an exhaust air subcooler, its structure and flow are as follows figure 1 As shown, the air conditioning unit includes a refrigerant circuit and an air circuit.

[0024] The refrigerant circuit includes a compressor 1, a condenser 2, a subcooler 3, a throttling device 4, and an evaporator 5 that are sequentially connected in circulation, wherein the condenser 2, the subcooler 3, and the evaporator 5 all include refrigerant passages and Air channel, in the refrigerant circuit, the condenser 2, the subcooler 3 and the evaporator 5 are all connected to the refrigerant channel, and the specific process is as follows: the low-temperature and low-pressure refrigerant vapor coming out of the evaporator 5 refrigerant channel is refrigerated The refrigerant connecting pipe 18 enters the compressor 1, and becomes a high-temperature and high-pressure refrigerant vapor under the action of the compressor 1; enters the refrigerant passage of t...

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PUM

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Abstract

The invention relates to an air-conditioning unit for subway trains with an exhaust supercooler. The air-conditioning unit includes a refrigerant circuit and an air circuit; the refrigerant circuit is filled with refrigerant, including a compressor, a condenser, and a throttling device. and an evaporator, the refrigerant circuit also includes a subcooler, wherein the compressor, condenser, subcooler, throttling device and evaporator are sequentially connected in a cycle; the air circuit includes an evaporator air circuit, an overcooler cooler air circuit and condenser air circuit. Compared with the prior art, the present invention uses the exhaust air of the compartment for cooling without consuming additional energy, and adds a subcooler to increase the cooling efficiency of the air conditioning unit. Simulation results show that after adding the subcooler, the refrigeration performance system 9% improvement.

Description

technical field [0001] The invention relates to an air-conditioning unit for a subway train, in particular to an air-conditioning unit for a subway train with an exhaust supercooler. Background technique [0002] Air conditioners in subway trains are mostly cold-only systems. In the existing air-conditioning units of subway trains, the exhaust air in the compartment is directly discharged to the outdoor environment through the exhaust fan and the air duct, and there is a huge waste of cooling capacity. In addition, the size of air-conditioning units for subway trains is strictly limited, the heat exchange effect of the heat exchanger is poor, and the cooling efficiency of the units is low. Contents of the invention [0003] The object of the present invention is to provide a subway train air-conditioning unit with an exhaust air subcooler with low energy consumption and good refrigeration efficiency in order to overcome the above-mentioned defects in the prior art. [00...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B40/02F25B41/00
CPCF25B40/02F25B41/40
Inventor 邵亮亮曹祥蔡思维张春路
Owner TONGJI UNIV
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