Device for storing refrigerant in a refrigerant circuit and method for operating the device

Abstract

The invention relates to a device for storing refrigerant of a refrigerant circuit, which is used, in particular, in an air-conditioning system of a motor vehicle. The device has: a housing with a wall surrounding the volume, the wall having an inlet and an outlet for introducing a refrigerant-oil mixture; a refrigerant outlet line arranged in the interior of the housing, so The refrigerant output line has an inlet opening positioned above the liquid level of the refrigerant for receiving gaseous refrigerant; and a system for leading oil back to the compressor, the system having an Below the liquid level of the refrigerant, in particular below the liquid level of the oil, at least one through opening is formed in the refrigerant outlet line. Furthermore, the at least one through-opening formed in the refrigerant outlet line has an adjustable through-flow cross-section which is variable by means of the closure device. Furthermore, the invention relates to a method for operating the device.

Description

technical field [0001] The invention relates to a device for storing refrigerant of a refrigerant circuit, in particular for an air-conditioning system of a motor vehicle. Furthermore, the invention relates to a method for operating the device. Background technique [0002] Conventional refrigerant circuits, especially cold vapor-compression refrigerant circuits, for example in air-conditioning systems or refrigeration systems, use various refrigerants, such as partially or completely halogenated fluorocarbons, HFKW or FKW for short, Or natural substances such as carbon dioxide operate as the working fluid. In this case, the refrigerant circuit is often designed with a device for separating and storing the refrigerant, which receives additional refrigerant in order to compensate for the refrigeration that inevitably escapes from the refrigerant circuit during maintenance intervals. agent. In addition, the amount of refrigerant circulating in the refrigerant circuit is rel...

AI Technical Summary

Problems solved by technology

Here, the efficiency of the operation of the refrigeration circuit can be significantly reduced

Also, liquid shock caused by liquid refrigerant being drawn into the compressor can damage the compressor

[0012] When conducting the process subcritically, a device for storing refrigerant with a system for transporting oil back to the compressor can be placed not only as a storage tank in the low-pressure area, but also as a collector in the high-pressure area , while the device cannot be arranged as a collector when conducting the process transcritically, for example with carbon dioxide as refrigerant, so that it is not possible to use the systems known from the prior art for leading back oil, that is to say with local A system of U-shaped pipes or J-shaped pipes arranged stretchingly at the bottom, said U-shaped pipes or J-shaped pipes having through-openings for introducing oil into the pipes

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