摘要:
Suppression of variation in the charging time of refrigerant into a refrigerant circuit is enabled. A refrigerant charging device includes: an electric valve (49) provided in a supply pipe (47); a flow rate control unit (50) for controlling the degree of opening of the electric valve (49) such that the flow rate in the supply pipe (47) lies within a predetermined range, on the basis of a pressure difference between pressure of refrigerant supplied to the supply pipe (47) and the pressure of refrigerant on the suction side of a compressor (14); an outdoor air temperature sensor (36) for detecting outdoor air temperature; and a low-pressure side pressure sensor (34) for detecting refrigerant pressure on the suction side of the compressor (14). The pressure difference is a difference between a saturation pressure corresponding to the outdoor air temperature detected by the outdoor air temperature sensor (36) and refrigerant pressure detected by the low-pressure side pressure sensor (34).
摘要:
A refrigerant recovery and recharge device and a method to operate the refrigerant recovery and recharge device is disclosed. The refrigerant recovery and recharge device (10) is adapted to be connected to refrigeration equipment (12). The device (10) comprises at least a valve block (14), an accumulator (16), a compressor (18) and a tank (20). The device (10) also comprises a first flow path (22) adapted to recover refrigerant from the refrigeration equipment (12) and a second flow path (24) adapted to recharge refrigerant to the refrigeration equipment (12). The device (10) is characterized by comprising a third flow (path 26) adapted to redirect refrigerant from tank (20) to accumulator 16; at least one valve (28) located in the third flow path (26) adapted to be actuated in a manner that allows redirection of refrigerant from tank (20) to accumulator (16); and a control unit (32) adapted to control actuation of at least one valve (28).
摘要:
A non-flammable refrigerant mixture is disclosed. The non-flammable refrigerant mixture consists essentially of (a) from 20 weight percent to 25.5 weight percent HFO-1234yf, (b) from 20 weight percent to 24.5 weight percent HFC-32, (c) from 24.5 weight percent to 30 weight percent HFC-125 (d) from 25.5 weight percent to 30 weight percent HFC-134a, and (e) from about 0.0001 weight percent to 10 weight percent trans-HFO-1234ze. These refrigerant mixtures are useful as components in compositions also containing non-refrigerant components (e.g. lubricants), in processes to produce cooling, in methods for replacing refrigerant R-404A or R-507, and in refrigeration apparatus.
摘要:
A method of measuring weight of the refrigerant recovered and a device for refrigerant recovery and recharge device is disclosed. A connection is established between the refrigerant recovery path and refrigerant recharge path. Refrigerant is filled in the refrigerant recovery path and the refrigerant recharge path. Once the refrigerant occupies the all components of the refrigerant recovery and recharge device, weight of the refrigerant storage tank is measured. The weight of the refrigerant storage tank is measured once before the recovery of the refrigerant from the refrigeration equipment and once after recovery of the refrigerant from the refrigeration equipment. Difference in the weights measured before recovery and after recovery is calculated to a get the amount of refrigerant recovered.
摘要:
An apparatus for recovering and depurating a cooling fluid having at least one passage duct of cooling fluid that extends entering or exiting the apparatus. Each passage duct has a distal end configured to be connected to a high and/or low pressure connection of high and low pressure lines of a refrigeration circuit and a proximal end connected to a coolant inlet/outlet fitting. The apparatus also includes a coolant recovery and depuration pathway, and a collection container of accumulated cooling fluid that receives depurated cooling fluid from the recovery and depuration pathway.
摘要:
A method of operating a filling system, which is configured for transferring a refrigerant to a refrigeration system (48) and comprises a receiver (28) for collecting a refrigerant-air-mixture, comprises the steps of determining the saturation pressure of the refrigerant at the actual environmental conditions; determining the air pressure of the refrigerant-air-mixture within the receiver (28); and stopping the operation of the filling system and/or issuing an alarm if the air pressure of the refrigerant-air-mixture within the receiver (28) exceeds the saturation pressure of the refrigerant by more than a predetermined margin or if the change of the air pressure within the refrigerant-air-mixture within the receiver over time exceeds a predetermined margin.
摘要:
A vessel for use in an air conditioner recharging system contains a desiccant that may limit moisture in a hygroscopic fluid, such as liquid lubricant and/or dye. The vessel may thus limits the amount of moisture introduced as a result of replacing or injecting lubricant. The vessel may contain an amount of pure lubricant for the air-conditioning system, or a lubricant and fluorescent dye to aid in detecting leaks.