Patent DE-102010001929-A1 (DE)
Title: Refrigeration plant for cooling enclosed space, comprises a compressor, a capacitor, an expansion device and an evaporator, which are connected with wires, in such a way that a closed circuit is formed with a high-pressure side
Inventor: SONNEKALB MICHAEL
IPC: F25B9/00
Filed: 2010-02-15
Abstract: The refrigeration plant for cooling enclosed space, comprises a compressor (3), a capacitor (5), an expansion device (7) and an evaporator (9), which are connected with wires, in such a way that a closed circuit is formed with a high-pressure side and a low pressure side, where the low pressure side of the outlet extending itself from the expansion device to an inlet in the compressor, and a refrigerating agent contained in the refrigeration plant is flow through the low pressure side. The evaporator has a burst pressure, which is greater than 0.9 Pc, where Pc is the critical pressure. The refrigeration plant for cooling enclosed space, comprises a compressor (3), a capacitor (5), an expansion device (7) and an evaporator (9), which are connected with wires, in such a way that a closed circuit is formed with a high-pressure side and a low pressure side, where the low pressure side of the outlet extending itself from the expansion device to an inlet in the compressor, and a refrigerating agent contained in the refrigeration plant is flow through the low pressure side. The evaporator has a burst pressure, which is greater than 0.9 Pc, where Pc is the critical pressure of the refrigerant agent. The burst pressure of the high pressure side corresponds to the burst pressure of the evaporator. The amount of refrigerant agent in the refrigeration plant based on the volume occupied by the refrigerant agent of the refrigeration plant is smaller than the critical density of the refrigerant agent. The burst pressure of the low pressure side is greater than 0.9 Pc. The refrigeration plant is operated with a pressure, which is smaller than the critical pressure of the refrigerant agent, which contains an aliphatic or cycloaliphatic hydrocarbon, which contains a C-C multiple bond and/or an oxygen atom as ether bond or non terminal carbonyl group and/or in which one hydrogen atom is substituted by halogen, where the number of halogen atoms is small or equal to the number of hydrogen atoms when the aliphatic hydrocarbon contains no C-C multiple bonds and no oxygen or the aliphatic hydrocarbon contains refrigerant agent of an aromatic hydrocarbon in which the hydrogen atom is substituted by the halogen and/or by alkyl radicals. The alkyl radical of the carbon-carbon multiple bonds and/or the oxygen atom as ether bond or not contains the terminal carbonyl group and/or is substituted by the halogen on the alkyl radical of the hydrogen atom. The burst pressure of the low pressure side is greater than the critical pressure of the refrigerant agent, which has a critical temperature, which is greater than 93[deg] C. The amount of the refrigerant agent in the refrigeration plant based on the volume occupied by the refrigerant agent of the refrigeration plant is less than 0.3 rho c, where rho c is the critical density of the refrigerant agent. A safety pressure relief device is provided over a part of the refrigerant agent in exceeding a predetermined pressure which is smaller than the burst pressure from which the refrigeration plant is derived by a place without ignition source and from hot surfaces. The refrigerant agent is derived in a container, which optionally contains a sorbent.