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Title:
PRESSURE PROTECTION CONTROL SYSTEM FOR CO2 AIR CONDITIONING SYSTEM OF RAIL TRANSIT VEHICLE
Document Type and Number:
WIPO Patent Application WO/2022/160555
Kind Code:
A1
Abstract:
A pressure protection control system for a CO2 air conditioning system of a rail transit vehicle. A series circuit is composed of a ventilator air pressure switch (1), a condensation fan air pressure switch (2), a pressure switch (4), a compressor pipeline temperature protection switch (7), and a coil of a compressor contactor (10). An input end of a controller (9) is connected to a 110 Vdc+ power supply and a 110 Vdc- power supply. An output port of the controller (9) is connected to the ventilator air pressure switch (1). A pressure sensor (3) is connected to an input terminal of the controller (9). The other end of the coil of the compressor contactor (10) is connected to the 110 Vdc- power supply. A terminal on a side of a compressor thermal magnetic circuit breaker (5) is connected to a 380 Vac power supply, and a terminal on the other side is connected to a port on a side of the compressor contactor (10). A terminal on the other side of the compressor contactor (10) is connected to a main loop wire feeding port of a compressor (11). The disconnection of any component in the series circuit causes the compressor contactor (10) to be disconnected from the loop, thereby providing a six-level protective measure for a CO2 air conditioner and effectively increasing the safety protection of the pressure in a refrigeration circuit in a CO2 air conditioning system of a rail transit vehicle.

Inventors:
MENG FANJIE (CN)
ZHAO BO (CN)
DU PING (CN)
WANG HAIYAO (CN)
ZENG LEI (CN)
LI JIYANG (CN)
YANG BO (CN)
CHEN JIANBO (CN)
PANG XUEBO (CN)
SONG DAPENG (CN)
BAO MINGDONG (CN)
Application Number:
PCT/CN2021/099346
Publication Date:
August 04, 2022
Filing Date:
June 10, 2021
Export Citation:
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Assignee:
CRRC DALIAN INST CO LTD (CN)
International Classes:
B61D27/00; B60H1/00; B61C17/00; F24F11/00; F25B9/00; F25B49/02
Attorney, Agent or Firm:
DALIAN ZHICHENG PATENT AGENCY (CN)
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