Air conditioning apparatus for recreational vehicles
AssigneeDometic Sweden AB
InventorsEnrico Paci, Andrea Cipressini
Life of this patent
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Abstract
An air conditioning apparatus for recreational vehicles comprises a refrigeration circuit for circulating a refrigerant fluid, said refrigeration circuit including: a condenser, an expansion valve, an evaporator, in heat exchange with a room of the recreational vehicle to be air-conditioned, a compressor, and a leakage detection system, including: a refrigerant fluid sensor, configured to detect a control parameter representative of a physical condition of the refrigerant fluid at the outlet of the evaporator or at the inlet of the condenser; a control unit, connected to the refrigerant fluid sensor, and to the compressor.
Claims15
An air conditioning apparatus for recreational vehicles, comprising:
- a refrigerant fluid;
- a refrigeration circuit for circulating the refrigerant fluid, said refrigeration circuit
- including:
- a condenser, in heat exchange with an external environment and configured to condense the refrigerant fluid;
- an expansion valve, configured to expand the refrigerant fluid;
- an evaporator, in heat exchange with a room of the recreational vehicle to be air-conditioned and configured to evaporating the refrigerant fluid;
- a compressor, configured to compress the refrigerant fluid, wherein the evaporator has an inlet connected to the expansion valve and an outlet connected to the compressor and the condenser has an inlet connected to the compressor and an outlet connected to the expansion valve;
- a leakage detection system, including:
- a refrigerant fluid sensor, configured to detect a control parameter representative of a physical condition of the refrigerant fluid at the outlet of the evaporator or at the inlet of the condenser;
- a control unit, connected to the refrigerant fluid sensor, wherein the control unit is further connected to the compressor and is configured to:
- receive, in real time, the control parameter from the refrigerant fluid sensor and a compressor operation signal, representative of an operating status of the compressor, from the compressor,
- select reference values previously memorized in a database, as a function of the compressor operation signal,
- compare the value of the control parameter with the reference values, to generate a diagnostic parameter for assessing a leakage condition.
A method for detecting a leakage of refrigerant fluid in a refrigeration circuit for a recreational vehicle, wherein the refrigeration circuit includes a condenser, in heat exchange with an external environment, an expansion valve, an evaporator, in heat exchange with a room of the recreational vehicle to be air-conditioned, a compressor, wherein the method comprises the following steps:
- detecting a control parameter, representative of a physical condition of the refrigerant fluid at an outlet of the evaporator or at an inlet of the condenser;
- receiving in real time, at a control unit the control parameter and a compressor operation signal, representative of an operating status of the compressor,
- selecting reference values previously memorized in a database, as a function of the compressor operation signal,
- comparing the value of the control parameter with the reference values, and generating a diagnostic parameter for assessing a leakage condition.
Dependencies are inferred from the claim text.