The disclosure relates to a method and a device for providing zeotropic refrigerants in which the refrigerant is formed from a refrigerant blend of at least two components, the components being added to a container in the ratio of their respective mass fractions to the refrigerant, and the refrigerant blend being formed in the container, wherein the temperature and/or the pressure in the container is set by means of a control device such that the refrigerant is present exclusively in the gas phase or exclusively in the liquid phase.

A purge system for removing non-condensables from a chiller system includes a purge chamber, a plurality of carbon beds fluidly connected to the purge chamber into which a flow of refrigerant and non-condensables is selectably directed from the purge chamber to remove the non-condensables therefrom. A vent line is fluidly connected to the plurality of carbon beds to dispose of the collected non-condensables, and a heater is operably connected to the plurality of carbon beds to selectably heat one or more of the carbon beds of the plurality of carbon beds to release refrigerant therefrom and direct the released refrigerant to the purge chamber.

A refrigerant amount management system manages an amount of refrigerant with which a plurality of refrigeration cycle apparatuses is filled. Each refrigeration cycle apparatus has a refrigerant circuit. The refrigerant amount management system includes an additional-filling-amount obtaining unit that obtains an additional filling amount of refrigerant with which a refrigeration cycle apparatus has been additionally filled after installation, a storage unit, and a useful-information creation unit. The storage unit stores apparatus information regarding the refrigeration cycle apparatus that has been additionally filled with refrigerant and the additional filling amount of the refrigeration cycle apparatus identified with the apparatus information in association with each other. The useful-information creation unit creates useful information to be used in management of the amount of refrigerant based on the additional filling amount of one of the refrigeration cycle apparatuses and the additional filling amount of another of the refrigeration cycle apparatuses.

An HVAC system includes a heating element, a discharge air temperature sensor, and a return air temperature sensor. A controller of the HVAC system determines that the HVAC system has been operating in the heating mode for at least a predefined amount of time. The controller receives measurements of the discharge air temperature and the return air temperature. A temperature rise value is determined using the discharge air temperature and return air temperature. If the temperature rise value is less than a predefined minimum threshold value, the controller determines that a first fault of the HVAC system is detected and provides a corresponding alert. If the temperature rise value is greater than a predefined maximum threshold value, the controller determines that a second fault of the HVAC system is detected and provides a corresponding alert.

An additional-filling-amount management system includes a mass correlation data obtaining unit, an additional-filling-amount determination unit, and a storage unit. The mass correlation data obtaining unit obtains mass correlation data correlating with a mass of a refrigerant container from which refrigerant is supplied to a refrigeration cycle apparatus that is additionally filled with refrigerant. The additional-filling-amount determination unit determines an additional filling amount based on the mass correlation data, the additional filling amount being an amount of refrigerant, from the refrigerant container, with which the refrigeration cycle apparatus has been additionally filled. The storage unit stores apparatus information regarding the refrigeration cycle apparatus for which additional filling with refrigerant is completed and the additional filling amount that is the amount of refrigerant with which the refrigeration cycle apparatus identified with the apparatus information has been filled, in association with each other.

There is provided a refrigerant charging method in which a foreign material and moisture are avoided from entering a heat source unit until a refrigeration cycle apparatus is configured. The refrigerant charging method is a method of charging a refrigerant to a refrigerant circuit in which a refrigeration cycle is to be performed by a circulating refrigerant, the refrigerant circuit being configured by connecting a second heat source unit and a utilization unit to each other. The refrigerant charging method includes charging a first refrigerant to the second heat source unit before connecting the second heat source unit to the utilization unit to configure the refrigerant circuit, and connecting the second heat source unit to the utilization unit and charging a second refrigerant that differs from the first refrigerant to the refrigerant circuit to obtain the circulating refrigerant that includes the second refrigerant and the first refrigerant that is charged in the second heat source unit.

The present disclosure relates to the field of air conditioning technology. In particular, it involves a refrigerant charging method for variable speed compressor based ac system.

Maintenance apparatus of an air conditioning system mounted on a motor vehicle. The maintenance apparatus comprises: two external ducts, a discharging circuit, which is connected to the ducts to receive the carbon dioxide contained in the air conditioning system at a first pressure and a first flow rate and is structured so as to discharge the carbon dioxide received into the environment, a measuring apparatus, which is configured so as to measure the amount of carbon dioxide that passes through the discharging circuit, and a pressure and flow rate reducing device, which is structured so as to reduce the first pressure and the first flow rate of the carbon dioxide to the be measured to a second predetermined pressure and to a second predetermined flow rate, respectively.

A purge system for removing non-condensables from a chiller system includes a purge chamber, a plurality of carbon beds fluidly connected to the purge chamber into which a flow of refrigerant and non-condensables is selectably directed from the purge chamber to remove the non-condensables therefrom. A vent line is fluidly connected to the plurality of carbon beds to dispose of the collected non-condensables, and a heater is operably connected to the plurality of carbon beds to selectably heat one or more of the carbon beds of the plurality of carbon beds to release refrigerant therefrom and direct the released refrigerant to the purge chamber.

A method for loading refrigerant fluid into an A/C system from an apparatus for recovering and regenerating refrigerant fluid includes a step of hydraulically connecting the apparatus with the A/C system by a high pressure pipe and a low pressure pipe and a step of loading refrigerant fluid present in a storage container of the apparatus into the A/C system.