Method for determining wire connections in a vapour compression system

摘要

A method for determining wire connections in a vapor compression system (1) is disclosed. The vapor compression system comprises a compressor, a condenser, an expansion device (2) and an evaporator (3) being fluidly interconnected in a refrigerant path, and two or more sensor devices (7, 8, 9, 10, 11) arranged for measuring variables which are relevant for the operation of the vapor compression system (1). The method comprises the steps of changing an operational setting, e.g. an opening degree of the expansion device (2) for the vapor compression system (1), monitoring variable values, such as temperatures, being measured by at least two sensor devices (7, 8, 9, 10, 11), e.g. arranged at various positions of the vapor compression system (1), in response to said changed operational setting, comparing the measured variable values to expected behavior of at least one variable measured by a sensor device (7, 8, 9, 10, 11) in response to said changed operational setting, and based on the comparing step, determining at least one wire connection of the vapour compression system (1). The method allows correct wire connections to be established without any special effort from the installing personnel, and without requiring rewiring of the system.

主权项

1. A method for determining wire connections in a vapour compression system, the vapour compression system comprising a compressor, a condenser, an expansion device and an evaporator being fluidly interconnected in a refrigerant path, and two or more sensor devices arranged at different locations in the vapour compression system relative to the evaporator for measuring variables responsive to a mass flow of refrigerant through the evaporator, the variables being relevant for the operation of the vapour compression system, the method comprising the steps of:
changing a single operational setting for the vapour compression system, monitoring rates of change of variable values being measured by the at least two sensor devices at different locations in the vapour compression system relative to the evaporator in response to said single changed operational setting, each variable value being monitored by a sensor device of the at least two sensor devices having a dynamic response when the single operational setting is changed based at least in part on the mass flow of refrigerant through the evaporator so that said monitored rates of change of variable values being measured by the at least two sensors exhibit differing dynamical behavior in response to said single changed operational setting, comparing the monitored rates of change of the measured variable values to expected dynamical behavior of at least one variable measured by a sensor device in response to said single changed operational setting, and based on the comparing step, determining at least one wire connection of the vapour compression system when a mutual level of a minimum value of a monitored rate of change of a measured variable values of the monitored rates of change compared to minimum values of rates of change of other measured variable values of the monitored rates of change is the same as an expected mutual level of the expected dynamical behavior.