Air conditioning system and pressure adjusting method for same

Abstract

The invention discloses an air conditioning system and a pressure adjusting method for the same. The air conditioning system comprises an outdoor unit and at least one indoor unit. The outdoor unit comprises a pressure adjusting device; the pressure adjusting device is arranged at the refrigerant discharging pipe of the outdoor unit; the pressure adjusting device comprises a pressure sensor, a control unit and a flow adjusting unit, wherein the pressure sensor is used for detecting an actual pressure value at the refrigerant discharging pipe of the outdoor unit; the control unit is used for comparing the actual pressure value detected by the pressure sensor and a pre-set pressure threshold value, and controlling the opening of the flow adjusting unit according to a comparing result; and the flow adjusting unit is used for adjusting the flow of flowing a refrigerant of the outdoor unit under control of the control unit. According to the air conditioning system provided by the invention, hyper-normal high-drop connection between the indoor unit and outdoor unit of the air conditioning system can be realized, so that the requirement of mounting the air conditioning system, such as a multi-couple unit, within a higher drop range can be met.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to an air conditioning system and a pressure adjustment method for the air conditioning system. Background technique [0002] Multi-connected units (or the air conditioning system in which the outdoor unit drags multiple indoor units, and only multi-connected units are mentioned in the subsequent content) is connected with an extraordinary high drop and the outdoor unit is on top of the indoor unit. When the unit is in cooling operation, Due to the high drop between the indoor and outdoor units, the refrigerant in the liquid pipeline generates a large liquid column pressure before entering the throttle valve of the indoor unit. Under high-temperature refrigeration conditions, if the liquid column pressure is not decompressed, the pressure of the liquid refrigerant in front of the electronic expansion valve of the indoor unit will exceed the design pressure of the refrigeran...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problem in the related art that cannot effectively solve the problem that the excessive liquid column pressure of the liquid pipe between the indoor and outdoor units causes danger to the system due to the excessive height difference, the present invention proposes a pressure regulating method and device for air conditioning equipment, which can solve the problem of Under the ultra-conventional high-drop connection, the pressure in front of the electronic expansion valve of the indoor unit exceeds the design pressure of the refrigerant system and a dangerous problem occurs, thereby realizing the ultra-conventional high-drop connection between the multi-line indoor and outdoor units to meet the multi-line in a larger Requirements for high drop range installation

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