Air conditioning system with pressure relief function

Abstract

The invention discloses an air conditioning system with a pressure relief function. The air conditioning system comprises a compressor, a condenser, an expansion valve, an evaporator and a gas-liquid separator. A pressure relief branch is arranged between an inlet pipe of the condenser and an inlet pipe of the evaporator, an electromagnetic valve is serially connected in the pressure relief branch, and turning on and turning off of the electromagnetic valve are staggered and synchronized with turning on and turning off of the compressor. Since the pressure relief branch is arranged between the inlet pipe of the condenser and the inlet pipe of the evaporator, a high-pressure refrigerant in the condenser can be quickly released into low-pressure refrigerant of the evaporator, pressure balance of a refrigerating system is quickly established, and pressure difference is prevented from existing in the system when the compressor is started again; meanwhile, diameter of the pressure relief branch is large, so that oil return of the refrigerating system is well guaranteed, and heat exchange effect of the system is improved; moreover, a pressure sensor is further arranged at the position of the electromagnetic valve, pressure relief information can be fed back to an air conditioning control system by the pressure sensor, and accordingly convenience is brought to the control system to adjust states of an air conditioner.

Description

technical field [0001] The invention relates to an air conditioning system with pressure relief function. Background technique [0002] Because the industrial air conditioner is used in a special environment and requires many functions, the refrigeration system of the industrial air conditioner has a complex structure and the compressor used is too large, which brings inconvenience to the rapid establishment of pressure balance and system oil return in the refrigeration system. However, the start-up of the compressor is carried out when the pressure of the refrigeration system is balanced. If there is a pressure difference in the system, the compressor will be damaged when it starts. If the pressure difference is too large, the compressor will be stuck or damaged. At present, in order to prevent the compressor from starting in a system with a pressure difference, a delay method is generally used to solve the problem, that is, when the compressor stops, the circuit board cont...

AI Technical Summary

Problems solved by technology

The length of compressor power-off time in the delay method is determined according to the complexity of the system, which makes the circuit boards of industrial air conditioners of the same brand less interchangeable. If the compressor power-off time is unified, it will be used cause inconvenience

In addition, relying on the natural balance of the system pressure difference, it is easy to cause the system oil to deposit in the condenser, reducing the heat exchange capacity of the condenser

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