The aim of the invention is to enable air conditioning systems of vehicles (F) to be filled with refrigerant (K) in a simpler and more efficient manner. This is achieved by a filling device having a receiving region for receiving a pressure container filled with the refrigerant (K), a valve unit, being connected to an outlet of the pressure container, for controlling the quantity of the refrigerant (K) being supplied to the vehicle (F), and a heating device (9) for heating the pressure container, wherein the heating device has at least one infrared heating unit to heat the pressure container without any contact.

An air conditioning service system includes an inlet port configured to connect to an air conditioning system to receive refrigerant, a discharge circuit, a pressure transducer, and a controller. The discharge circuit includes a plurality of discharge lines arranged in parallel with one another, each of the plurality of discharge lines fluidly connecting the inlet port to the atmosphere through an associated orifice to vent the refrigerant to atmosphere, and a plurality of discharge valves, each of which is configured to open and close an associated one of the plurality of discharge lines. The controller is configured to obtain the pressure at the inlet port and determine a theoretical mass flow rate through each of the plurality of discharge lines based upon the pressure and the cross-sectional area of the associated orifice, and to operate selected ones of the discharge valves based upon the determined theoretical mass flow rates.

Efficiency in refrigerant charging work is addressed when a refrigerant recovered from the first heat source unit is to be charged to a second heat source unit. In a refrigerant charging method in which a first heat source unit of an already installed refrigeration cycle apparatus in which a refrigeration cycle is to be performed by a refrigerant that circulates is replaced with a second heat source unit, transferring the refrigerant from the first heat source unit to the second heat source unit is included. In addition, the method includes measuring the weight of the refrigerant that is transferred from the first heat source unit to the second heat source unit.

A system and method for retrofitting a refrigeration system containing an HCFC refrigerant and a compatible lubricant, with an HFC refrigerant, comprising providing a transport container containing a mixture of about 5-15% by weight of a miscible lubricant and the HFC refrigerant, removing the HCFC refrigerant from the refrigeration system while maintaining at least a portion of a lubricant immiscible with the HFC refrigerant, and charging the refrigeration system with the mixture.

A system for charging an outdoor unit with refrigerant includes a sensor configured to measure a refrigerant concentration and a user device configured to receive the measured refrigerant concentration. The system includes that the user device is configured to, in response to the measured refrigerant concentration exceeding a threshold, generate and display an alert on a user interface of the user device indicating the measured refrigerant concentration exceeds the threshold.

A method, system and device provides for the conversion of a mini-split AC unit to a mini-split AC unit with quick connect pre-charged ends. Quick connect fittings are placed onto the AC unit lines after the nitrogen pre-charge is released from the liquid line. A fitting tool/device having one or more fittings and valves is attached to the liquid line. A vacuum pump attached to the fitting tool/device vacuums the evaporator until its micron level falls and stays below 500 microns. Then, a refrigerant line attached to the fitting tool/device adds approximately 1 ounce of refrigerant to the evaporator.

An air conditioning service system includes an oil receptacle, a coupling port in fluid communication with the oil receptacle through an oil injection line, a solenoid valve configured to selectively allow the oil to flow from the oil receptacle into the oil injection line, a memory including program instructions stored therein, and a controller operably connected to the solenoid valve and the memory. The controller is configured to execute the program instructions to obtain at least one viscosity signal associated with a viscosity of the oil, obtain a volume signal indicative of an amount of oil to be charged, determine a time period based upon the obtained at least one viscosity signal and the obtained volume signal, control the solenoid valve to an open condition, and control the solenoid valve to a closed condition after the determined time period has passed since opening of the solenoid valve.

Method for transferring coolant fluid from a loading unit/station (20) to an air conditioning system (10), via at least one high pressure HP valve (7) and duct (15), for the introduction of liquid coolant, and at least one low pressure LP valve (8) and duct (17), for the suction and the recovery of the coolant-vapour in the system (10). It is provided for executing the step of transferring the fluid also maintaining the low pressure circuit branch (17) open/active, through relative LP valve. Part of the coolant loaded during the transfer step passes through a valve for the expansion of the system and it is suctioned, as vapour, by the station through LP: the net amount that enters into the system is always positive given that there is more loaded coolant with respect to the suctioned coolant.

Method for transferring coolant fluid from a loading unit/station (20) to an air conditioning system (10), via at least one high pressure HP valve (7) and duct (15), for the introduction of liquid coolant, and at least one low pressure LP valve (8) and duct (17), for the suction and the recovery of the coolant-vapour in the system (10). It is provided for executing the step of transferring the fluid also maintaining the low pressure circuit branch (17) open/active, through relative LP valve. Part of the coolant loaded during the transfer step passes through a valve for the expansion of the system and it is suctioned, as vapour, by the station through LP: the net amount that enters into the system is always positive given that there is more loaded coolant with respect to the suctioned coolant.

A method for weighing and dispensing small amounts of HC refrigerant gases for appliances such as refrigerators, room air conditioners, small ice makers, wine coolers, etc. More particularly, it relates to method of weighing and dispensing small quantities of HC, or blended HC, gas refrigerants for such refrigerated appliances. Due to the safety hazards associated with large quantities of HC refrigerant gases in an enclosed space, only small containers, holding pre-measured amounts of HC refrigerant gas, are taken into the enclosed space where the refrigerated appliance is located.