Multi-channel independent throttling heat pump system

Abstract

The invention provides a multi-channel independent throttling heat pump system. The heat pump system is characterized in that a condenser comprises X condensing branches, a gas-phase flow divider is arranged on the inlet side of the condenser, and high-temperature and high-pressure refrigerants output by a compressor are distributed to the X condensing branches; X evaporation branches are arrangedon an evaporator, X condensation branches of the condenser are independently connected with throttling components separately to form independent X throttling branches, and the X throttling branches are connected with the X evaporation branches correspondingly; a gas-phase current collector is arranged at an outlet of the evaporator to collect refrigerants output by the X evaporation branches, andthe refrigerants pass through a gas-liquid separator and then are fed into the compressor; and n bypass branches are additionally arranged behind an exhaust outlet of the compressor and connected with inlets of n evaporation branches correspondingly, and each bypass branch is provided with an electromagnetic valve. The number of system components in a traditional mode is reduced, and accessory cost is saved; and hot gas bypass defrosting and oil return are alternately used in different areas without shutdown, and the stability of the heat energy requirement of the user side is improved.

Description

technical field [0001] The invention relates to the field of air source heat pump equipment, and more specifically relates to a multi-channel independent throttling heat pump system. Background technique [0002] The air source heat pump system has been widely used in the fields of refrigeration, heating and drying due to its excellent energy-saving characteristics. Conventional heat pump systems generally use air or water as the heat source. The refrigerant evaporates by absorbing the low-temperature heat source in the air in the side-fired evaporator, enters the compressor, and is compressed into a high-temperature and high-pressure gas by the compressor. Then it is discharged to the condensation side, where condensation occurs in the condenser, and heat is discharged to realize heating. A conventional heating heat pump system mainly includes a compressor, a low-pass switch, a gas-liquid separator, a four-way valve, a gas collection side, an evaporator, an axial flow fan,...

AI Technical Summary

Problems solved by technology

In severe cases, the compressor may run without oil and the mechanical wear will increase

In addition, the lubricating oil adheres to the inner surface of the copper tube, which increases the heat transfer resistance, which is not conducive to the heat transfer of the evaporator, and directly reduces the heating capacity.

[0007] 4. Since the evaporating side needs to be defrosted, the system needs to be turned on frequently. At this time, the risk of liquid return caused by the instantaneous start of the compressor and the mechanical wear of the parts caused by frequent turns are increased, and the service life of the product is shortened.

Images