688results about "Refrigerants" patented technology

The present invention relates to compositions for use in refrigeration, air-conditioning, and heat pump systems wherein the composition comprises E-1,2-difluoroethylene. The compositions of the present invention are useful in processes for producing cooling or heat, as heat transfer fluids, foam blowing agents, aerosol propellants, and power cycle working fluids.

A diagnostic monitoring system and method is employed for one or more vapor compression systems such as air conditioners and heat pumps having a compressor, an indoor air handler fan coil and an outdoor condensor. Temperature, voltage and current sensors are provided at the outdoor condensor to determine that at least one vapor compression system is operating properly. Data obtained from the sensors is wirelessly transmitted to a receiving-device for use by the systems' custodian or repair service provider and includes information concerning an occurrence of periods when one or more of the vapor compression systems are operating at an abnormal state.

A refrigerant recovery unit is provided that can recover and recharge refrigerant. The unit is further configured with a pair of service hoses and a refrigerant control circuit operable to receive and transport the refrigerant between the hoses and the storage vessel and to process the refrigerant to substantially remove contaminants from the refrigerant. A fluid connector is provided in fluid communication with the hoses to enable the refrigerant to flow between the hoses and to establish a closed loop through the refrigerant control circuit, and a controller is operatively connected to the refrigerant control circuit and configured to control a flow of the refrigerant through the refrigerant control circuit and through the fluid connector.

A refrigerant charging system for charging a refrigeration system with refrigerant includes a refrigerant source, a storage vessel, input and output lines, and a device for detecting mass of refrigerant within the storage vessel. The input line fluidly connects the refrigerant source to the storage vessel, and the output line extends from the storage vessel and is adapted to connect to the refrigeration system. The system also includes an input control valve disposed between the storage vessel and the refrigerant source, and an output control valve disposed between the storage vessel and the refrigeration system. A heater is connected to the refrigerant source for raising the temperature of refrigerant within the refrigerant source. A method of charging a refrigeration system is also disclosed. The system and method are useful to charging the refrigerant system of an automotive vehicle, among others.

A refrigerating cycle apparatus is obtained that can determine excess/shortage of a refrigerant amount in a refrigerating circuit at high precision even if a factor such as a heat exchanger whose refrigerant amount is difficult to calculate exists. The refrigerating cycle apparatus according to the present invention includes one heat source unit or more, one utilization unit or more, a refrigerating circuit constituted by the heat source unit and utilization unit, a storage part which stores an appropriate refrigerant amount of a refrigerant to be charged in the refrigerating circuit and a correction coefficient which corrects a liquid refrigerant amount such that calculation of the refrigerant amount of each constituent element of the refrigerating circuit is equal to the appropriate refrigerant amount, a measurement part which detects an operation state amount in each constituent element of the refrigerating circuit, a calculation part which calculates the refrigerant amount of each constituent element of the refrigerating circuit based on the operation state amount by using the correction coefficient, a comparison part which compares the appropriate refrigerant amount with a calculative refrigerant amount calculated by the calculation part, and a determination part which determines excess/shortage of the refrigerant amount charged in the refrigerating circuit based on a comparison result of the comparison part.

A heat pump system (10) includes a compressor (20), a reversing valve (30), an outdoor heat exchanger (40) and an indoor heat exchanger (50) coupled via refrigerant lines (35, 45, 55) in a conventional refrigeration circuit, a refrigerant to liquid heat exchanger (60), a refrigerant to liquid heat exchanger bypass valve (130), an outdoor heat exchanger bypass valve (230), and an indoor heat exchanger bypass valve (330). A controller (100) is provided to selectively control the respective positioning of the valves (30, 130, 230 and 330) between their respective open and closed positions so as to selectively configure the refrigerant circuit for operation in one of an air cooling only mode, an air cooling with liquid heating mode, an air heating only mode, an air heating with liquid heating mode, and a liquid heating only mode.

A method and apparatus are provided for indicating the status of the refrigerant charge in an air conditioning system based upon the degree of subcooling present in the condensed refrigerant system temperature measurements. The status of the refrigerant charge in the system is indicated in real-time on a service panel for access by a field service technician. The status of the refrigerant charge in the system on a time-average basis for a specified period of operation is presented on an indicator panel. The indicator panel includes a first indicator light indicating that the refrigerant charge is low, a second indicator light indicating that the refrigerant charge is high, and a third indicator light indicating that the refrigerant charge is correct.

a cooling apparatus 110 comprises a primary refrigerant circulating circuit which allows a primary refrigerant CW1 whose temperature is adjusted by a heat exchanger 138 to circulate through an electrode to adjust a temperature of the electrode, a secondary refrigerant circulating circuit which supplies a secondary refrigerant CW2 to the heat exchanger to adjust the temperature of the primary refrigerant, and a freezing circuit 140 which has a first heat exchanger 141 interposed in the secondary refrigerant circulating circuit and which adjust a temperature of the secondary refrigerant by a tertiary refrigerant. The temperature of the primary refrigerant is adjusted by the secondary refrigerant without adjusting the temperature using the freezing circuit. When a temperature of the primary refrigerant is set higher than that of the secondary refrigerant, the temperature of the primary refrigerant can be adjusted only by the secondary refrigerant. Only when the temperature of the primary refrigerant is set lower than that of the secondary refrigerant, the temperature of the secondary refrigerant is adjusted by the freezing circuit and thus, it is possible to save energy.

The invention provides a method and device for recovering air conditioner coolants. The method comprises the steps that when a command to recover the coolants is received, an electronic expansion valve is opened; a target recovery position of the coolants is determined, if target recovery position is located at an outdoor unit, a liquid valve is closed, the air conditioner works in a refrigeration mode, and when it is detected that the first temperature changing value of an evaporator is larger than or equal to a first preset temperature changing value within a first preset period or the time during which the first pressure value in a suction pipeline of a compressor is smaller than a first preset pressure value is equal to the first preset period, an air valve is closed; if the target recovery position is located at an indoor unit, the air valve is closed, the air conditioner works in a heating mode, and when it is detected that the second temperature changing value of a condenser in the outdoor unit is larger than or equal to a second preset temperature changing value or the time during which the second pressure value in the suction pipeline is smaller than the second preset pressure value is equal to the second preset period, the liquid valve is closed, and the air conditioner is controlled to stop working. By means of the scheme, emission of the coolants is reduced, and maintenance cost is lowered.

An apparatus and method for providing expandability to a refrigeration servicing unit which includes one or more integrated modules. The modules can communicate with the unit via a wired or wireless connection. The modules can add functionality such as an information module, a refrigerant identifier module, a communication module, a bar code module, and a diagnostic module.

A air-conditioner and the refrigerant charging method of the air-conditioner are disclosed. When a refrigerant amount determining mode is requested to be performed, whether or not the refrigerant amount in the air-conditioner is proper is automatically determined and a shortage amount of refrigerant can be charged. Thus, a user can easily check whether or not the refrigerant charged in the air-conditioner is sufficient or insufficient, and if the refrigerant is not sufficient, the user can automatically charge the refrigerant without having to entirely remove the refrigerant from the air-conditioner, thus increasing the user convenience and reducing time and costs.

A sub-unit for a vehicle air conditioning system is shipped with a condenser, chiller and fluid lines. Snap together couplings are placed on free ends of the fluid lines whereby the sub-unit can be pre-charged, shipped, installed into the front end of a vehicle engine compartment and connected to an air conditioning compressor.

A method, system and apparatus for transferring a measured level of liquefied refrigerant to a refrigeration system includes the steps of purging a calibration container; filling the calibration container with liquefied refrigerant from a liquefied refrigerant supply to a desired level; and charging a system with the liquefied refrigerant from the calibration container.

Refrigerant charging systems and methods of use are described herein. A refrigerant charging system may include a conduit, a valve releasably connectable to the outlet portion and coupled to a first end of the conduit; and a disconnect coupler fitting connected to a second end of the conduit. The disconnect coupler fitting may include a control structure positioned in a hollow body that, during use, allows refrigerant flow to the refrigerant circuit. The control structure may include one or more openings that allow controlled leakage of fluid from the refrigerant charging assembly when the refrigerant charging assembly is disconnected from at least the refrigerant service unit.

The invention relates to a refrigerant filling system and method and an air-conditioning machine set. The refrigerant filling system comprises a refrigerant detection device and a refrigerant filling device, wherein the refrigerant detection device is used for detecting the parameter of a refrigerant circulation system and used for judging whether the parameters of the refrigerant circulation system meet preset judgment conditions or not; if the preset judgment conditions are met, a refrigerant is filled into the refrigerant circulation system through the refrigerant filling device. By adopting the refrigerant filling system provided by the invention, the refrigerant can be filled through the refrigerant filling device under the condition that the refrigerant detection device detects that the refrigerant is in shortage, a part of procedures of manually filling the refrigerant can be canceled, and thus the cost is lowered.

A non-flammable refrigerant mixture is disclosed. The non-flammable refrigerant mixture may include 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 optionally (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 refrigerants R-404A, R-507, R-407A, R-407C, R-407F and/or R-22, and in refrigeration apparatuses.

Operation data of a refrigerant circuit is acquired after an initial refrigerant charge amount of refrigerant is charged in the refrigerant circuit and operation of the refrigerant circuit is started, an internal volume of a high-pressure pipe 6 is computed from the obtained operation data and the initial refrigerant charge amount input in a input unit 112, a target refrigerant charge amount is computed from the computed internal volume of the high-pressure pipe 6 and a standard operating state acquired in advance, the standard operating state being operation data of the refrigerant circuit when the refrigerant circuit is in a standard operating state that satisfies a preset condition, and an additional refrigerant charge amount is computed from the target refrigerant charge amount and the initial refrigerant charge amount.

Various embodiments of adapter systems and related apparatus, and methods of operating the same are described. The adapter of the systems is couplable to an outlet of a fluid source and an inlet of a routing device. The adapter includes a plunger configured to engage an integrated valve of the fluid source and to receive a member of the routing device. The routing device member includes an end capable of breaking a seal. Coupling of the routing device to the outlet may advance the plunger such that plunger engages the integrated valve and at least partially opens the integrated valve.

An apparatus for controlling the temperature of an electronic device under test includes a thermal head. The thermal head defines a flow channel for passage of a refrigerant fluid so as to cause transfer of thermal energy between the electronic device and the thermal head. A refrigeration system is connected in fluid communication with the flow channel of the thermal head to supply refrigerant fluid thereto. An inlet valve and outlet valve are provided to facilitate disconnection of the thermal head from the refrigeration system. The valves are sequentially closed with the refrigeration system continuing to operate during the interim period so as to reclaim the refrigerant fluid. Accordingly, thermal head may be disconnected from refrigeration system and removed.

A method for determining a level of refrigerant charge in a vapor compression system having a compressor, a condenser, an expansion device and an evaporator operatively connected in serial relationship in a refrigerant flow circuit having a refrigerant, includes receiving information indicative of at least one of a compressor torque or compressor current; and determining whether the refrigerant charge is within a defined tolerance or whether the refrigerant is to be added or recovered in response to the receiving of the information.

A charging system for charging a refrigeration system of a vehicle includes a controller, a refrigerant source, at least one line fluidly connecting the refrigerant source to the refrigeration system; a control valve disposed to control flow of the refrigerant from the refrigerant source to the refrigeration system, and an efficiency sensor for measuring the efficiency of the refrigeration system. The controller operates to cause the charging system to input into the refrigeration system a predetermined amount of refrigerant less than a recommended refrigerant charge amount; measure a baseline efficiency of the refrigeration system, input a supplemental amount of refrigerant into the refrigeration system, measure an adjusted efficiency of the refrigeration system, and compare the measured adjusted efficiency to the baseline efficiency using the controller.

An apparatus and method providing a refrigeration servicing system that comprises a clean refrigerant source, a recovery circuit and a flushing circuit. The recovery circuit can be configured to recover refrigerant from a cooling system. After recovery cycle is completed, the flushing circuit that is coupled to the recovery circuit can flush clean refrigerant through the recovery circuit. A housing can be provided and configured to house the refrigerant source, the recovery circuit and the flushing circuit.

A method is provided for detecting in real-time a refrigerant charge loss in a refrigerant vapor compression system. If both a sensed evaporator outlet superheat exceeds a target evaporator outlet superheat by at least a preset amount of superheat and a sensed degree of openness of an electronic expansion valve exceeds a preset degree of openness for a preset time of period, and a sensed air temperature of either a flow of supply air having traversed the evaporator or a flow of return air returning to the evaporator is changing at a rate less than preset air temperature rate of change, a service alarm is generated indicating a loss of charge warning.