oil sump - expansion tank

monoblock cooling unit is a type of air conditioning or refrigeration system where all components, including the compressor, condenser, evaporator, and expansion valve, are housed within a single unit or enclosure. This design contrasts with split-system air conditioners or refrigeration systems, where some components are located indoors (like the evaporator) and others outdoors (like the condenser and compressor). Monoblock units are commonly used in smaller-scale applications, such as window air conditioners, portable air conditioners, refrigerators, and freezers. They are often more straightforward to install and can be more compact compared to split-system units, making them suitable for spaces where there may be limited installation options or space constraints. Additionally, monoblock units can be more convenient for temporary or mobile cooling needs, such as in rented apartments or for use in recreational vehicles.