Spx Corporation

Bosch Automotive Service Solutions Inc.

Service Solutions U.S. LLC

Robert Boschgmbh

Other

Spx Corporation Robinair Division

William C Brown

Mark McMasters

Gary P Murray

Walter D Murray

Dylan M Lundberg

Bruce Brown

James Josh Driscoll

Cheryl Lynn Sellers

Jacob Hanson

Mark Alan Gasper

Michael Steven Schoenoff

Travis John Bakker

David Painter

Richard W Mills

Jade Marie Katinas

Charles E Dull

Jamie Stringfield

Jason Scott Cooper

John E Flaherty

James P Biedenharn

Mahendra Hospet Basavapura Srinivasa

Mark D Pfleeger

Jim Jirele

Stan Norland

Eric Vinyard

James Sarnes

Mark W Mcmasters

Mark Mcmasters

An air conditioning service unit and method of using same provide increased accuracy in determining respective amounts of refrigerant and oil recovered during service of an air conditioning system by taking into account the quantity of dissolved refrigerant in oil recovered from the system.

Apparatus and method for determining the quantity of dissolved refrigerant in oil recovered from an air conditioning system

An air conditioning service system includes a plurality of conduits and voids defining a total refrigerant receiving volume of the air conditioning service system, a pressure transducer configured to sense a pressure at a first location in the plurality of conduits and voids, a compressor operably connected to the plurality of conduits and voids, and a controller. The controller determines a quantity of refrigerant recovered from a refrigeration system by obtaining a first pressure signal from the pressure transducer corresponding to a first pressure at the first location, operating the compressor to recover the refrigerant from the refrigeration system after the first pressure is sensed, obtaining a second pressure signal from the pressure transducer corresponding to a second pressure at the first location after operating the compressor, and determining an amount of refrigerant recovered from the refrigeration system based on the first pressure signal an the second pressure signal.

System and method for recovering refrigerant

A refrigerant recovery system includes a first oil separator including a chamber configured to receive refrigerant from an air conditioning system, a heat exchanger disposed within the first oil separator, and a compressor fluidly connected to the chamber and the heat exchanger. A first valve is disposed in a first flow line that is fluidly connected between an inlet of the first oil separator and a source of refrigerant and a second valve is disposed in a second flow line that fluidly connects the compressor and the heat exchanger. A controller is configured to open the first valve to enable refrigerant to pass into the chamber of the first oil separator, open the second valve so that a flow loop for refrigerant is formed between the heat exchanger and the compressor, activate the compressor to heat the refrigerant flowing through the flow loop, and subsequently commence a refrigerant recovery operation.

A refrigerant recovery system includes a refrigerant storage unit, a refrigerant charge path, a flushing path, a processor, and a memory. The refrigerant storage unit is configured to store a refrigerant. The refrigerant charge path is configured to convey the refrigerant to a refrigeration system to recharge the refrigeration system with the refrigerant. The refrigerant charge path includes a first and second service coupler and a first and second service hose. The service hoses are in fluid communication with the respective service couplers. The flushing path is configured to receive a flow of refrigerant for flushing the refrigeration charge path. The flushing path includes a first and second flushing coupler. The processor is configured to control the refrigerant recovery system to provide a flow of the refrigerant from the storage unit, through the refrigerant charge path, and to the flushing path.

Modified hose flush device and method

A refrigerant recovery unit with improved charging accuracy is provided. In some embodiments, the contamination of charging refrigerant can be prevented while also providing greater refrigerant flow control. In addition, methods associated therewith for servicing refrigerant containing refrigeration systems are provided. In some aspects, the methods include steps that can be used to achieve more accurate assessments of the refrigerant that is charged into the refrigeration systems during servicing.

Method and apparatus for improving the charge accuracy of a refrigerant recovery unit

A method and charging apparatus for adding refrigerant to an air conditioning system are provided. The method includes calculating a temperature differential by measuring a first temperature of a refrigerant inside of a refrigerant container and measuring a second temperature either at the air conditioning system or the ambient temperature. The method further includes using the temperature differential to calculate a compensation amount of refrigerant to add to a previously determined recommended amount of refrigerant based on the type of air conditioning system being charged.

System and method for improving charge accuracy by temperature compensation

A refrigerant recovery unit for accurately filling a refrigerant system with a refrigerant is provided which includes a storage vessel for holding refrigerant, sensors to assist in determining the pressure of the refrigerant in the storage vessel, a controller to control the flow of refrigerant from the storage vessel to the refrigerant system to be serviced, and a heating device to heat the refrigerant, which is activated only if heating is required, as determined by data received by the controller.

Method for accurately recharging A/C systems

A refrigerant recovery unit is provided and includes a safe purging mode. The safe purging mode allows non-condensable gases to be incrementally purged from a storage tank when the determined ideal vapor pressure is high, such as 40 p.s.i., in order to minimize refrigerant loss during purging. The purging can be done in small increments of time, pressure or mass. The storage tank can include a dip tube that extends into the liquid portion of the refrigerant in order to heat up the refrigerant in the tank with the heated recovered refrigerant.

Apparatus and method for identifying and operating air purge in safe mode and having a dip tube

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.

Apparatus to clear oil from the hoses and front end of a recovery recharge machine

A method of charging or recharging an air conditioning wherein an initial amount of refrigerant is introduced, followed by additional introductions of refrigerant during injection pulses. The pulse periods are adjusted dynamically during the charging/recharging process based on feedback obtained after each pulse related to how much refrigerant was transferred during the previous pulse. Also, a system for implementing the above-mentioned method.

Air conditioning system recharging method and apparatus

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.

Internal clearing function for a refrigerant recovery/recharge machine

A refrigerant recovery unit is provided that can clear oil from an oil inject path in order to prepare the unit to switch over to a different kind of oil. The refrigerant recovery unit includes an oil inject circuit that receives an oil from the oil bottle into the refrigerant system. The refrigerant recovery circuit is coupled in fluid communication with the oil inject circuit. The refrigerant recovery circuit is operable to receive and transfer a fluid drawn through the oil inject circuit. A controller is operatively connected to the refrigerant recovery circuit and to the oil inject circuit so that as the fluid is drawn through the oil inject circuit a quantity of the oil in the oil inject circuit is removed.

Method and apparatus for clearing oil inject circuit for changing oil types

A refrigerant recovery unit that diverts blended refrigerant withdrawn out of a refrigerant system to an external tank outside the refrigerant recovery unit for reclamation includes a recovery circuit coupled on one end to the refrigerant system and coupled on another end to the external tank, a controller in communication with the recovery circuit for controlling a transfer of the refrigerant withdrawn from the refrigerant system to the external tank, and a valve operatively engaged with the controller and the recovery circuit and operable to transfer the refrigerant withdrawn from the refrigerant system to the external tank for recycling or reclamation.

Method for recovery and recharge of blend refrigerants with blend sent for reclamation

A method of adding refrigerant to an air conditioning system. The method includes measuring a first pressure inside of the air conditioning system and a second pressure inside of a container that holds refrigerant being added to the air conditioning system. The method also includes comparing the difference between the two measured pressures to empirical data in order to determine how long to pulse additional refrigerant into the air conditioning system. In addition, an apparatus configured to add refrigerant to an air conditioning system.

System and method for accurately recharging an air conditioning system

A method of determining whether a scale in a fluid handling device needs to be calibrated includes weighing a storage tank of fluid a first time with a scale, transferring the fluid from the storage tank to an area of known volume, weighing the storage tank at a second time with the scale, after fluid has been moved to the area of known volume, determining the pressure of the fluid in the area of known volume with a pressure sensor, calculating a temperature of the fluid in the area of known volume with the determined pressure, calculating the weight of fluid in the area of known volume based on the calculated temperature, calculating the weight of fluid in the area of known volume based on the determined temperature and temperature, comparing a difference in weight of the storage tank between the first and second weighing times with the weight of the fluid in the area of known volume; and sending a first signal to a user indicating a calibration of the scale is not needed if the difference between the compared weights of the fluid is within a predetermined range.

Growing community of inventors

Bryan, OH, United States of America

William C Brown