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5562861 Fluoroiodocarbon blends as cfc and halon replacements
PatentsA L E R T
IX
N E W REFRIGERANTS AND REFRIGERATION SYSTEMS
5561985 HEAT PUMP APPARATUS I N C L U D I N G E A R T H TAP H E A T EXCHANGER Cochran Robert W Lakeland, FL, UNITED STATES assigned to ECR Technologies Inc A ground-coupled direct expansion heat pump apparatus includes an earth tap heat exchanger including a plurality of earth contacting tubes connected together in side-by-side relation. A fast earth contacting tube defmes a vapor refrigerant passageway and a second earth contacting tube provides additional heat transfer with the fast earth contacting tube. Moreover, the earth tap heat exchanger includes a liquid refrigerant insulated passageway positioned within the second earth contacting tube. Each of the earth contacting tubes preferably comprises a thermal conductor, such as copper or a non-metallic material suitable for contact with refrigerant, to transfer heat with surrounding earth and with an adjacent earth contacting tube. The liquid refrigerant passageway and the vapor refrigerant passageway are preferably connected together in fluid communication adjacent lower ends thereof. Multiple vapor refrigerant passageways may be provided by additional earth contacting tubes. Method aspects of the invention are also disclosed.
5562157 HEAT EXCHANGER Hasegawa Etuo; Nagasawa Toshiya; Sumi Shogo Kounan, JAPAN assigned to Nippondenso Co Ltd A laminate type heat exchanger is formed from a plurality of plates and integrally brazed and joined. This heat exchanger includes a joint block, a refrigerant heat-exchanging portion which causes heat exchange between refrigerants, and an evaporating portion which causes heat exchange
between refrigerant and passenger-compartment air. The inventors formulated new index to perform successful integral brazing. A reference volume of a portion is a volume of the portion providing a predetermined amount of heat-receiving surface area of the portion, an index A of the portion is defmed by A=(volume of material of the portion to be heated existing in a reference volume of the portion)/(the reference volume of the portion), and a ratio of an index A1 which is the index A of the fast portion and an index A2 which is the index A of the second portion, i.e., A1/A2 is set within a certain range. Preferably, the certain range of the ratio of A1/A2 is def'med by I/2.2< or =A1/A2< or =2.2. Plate thickness tl of plates forming the refrigerant heat-exchanging portion and plate thickness t2 of plates of the evaporating portion have a relationship that a ratio tl/t2 is set within a range of 0.17< or =tl/t2< or =0.75.
5562861 F L U O R O I O D O C A R B O N BLENDS AS CFC AND H A L O N REPLACEMENTS Nimitz Jonathan; Lankford Lance Albuquerque, NM, UNITED STATES assigned to IKON Corporation A new set of effective, environmentally safe, nonflammable, low-toxicity refrigerants, solvents, foam blowing agents, propellants, and fa'efighting agents is disclosed. The agents are clean, electrically nonconductive, and have short atmospheric lifetimes, zero ozone-depletion potential, and low global warming potentials. The agents comprise at least one fluoroiodocarbon agent satisfying the general formula CaHbBrcCldFeIfNgOh, wherein a is between and including 1 and 8; b is between and including 0 and 2; c, d, g, and h are each between and including 0 and 1; e is between and including 1 and 18; and f i s between and including 1 and 2, either neat or mixed with additives selected from
X
PatentsA LER T
the group consisting of: alcohols, esters, ethers, fluoroethers, hydrocarbons, hydrofluorocarbons, and perfluorocarbons.
5568736 THERMAL
INTER-COOLER
Nivens Jerry W Truth or Consequences, NM, UNITED STATES assigned to Apollo Environmental Systems Corp
The invention comprises a non-restrictive, constant pressure refrigerant recycling and cooling unit that interrupts the normal refrigerant cycle to permit a lower temperature liquid to enter the expansion device, and thus provide a lower temperature, and therefore a lower pressure gas for delivery to the inlet side of the compressor, which acts to reduce the energy requirement and cost to operate the compressor. This reduction in pressure and temperature also results in lower operating costs and lower maintenance costs and utilizes less refrigerant quantity requirements.
IX
N E W REFRIGERANTS AND REFRIGERATION SYSTEMS
5561985 HEAT PUMP APPARATUS I N C L U D I N G E A R T H TAP H E A T EXCHANGER Cochran Robert W Lakeland, FL, UNITED STATES assigned to ECR Technologies Inc A ground-coupled direct expansion heat pump apparatus includes an earth tap heat exchanger including a plurality of earth contacting tubes connected together in side-by-side relation. A fast earth contacting tube defmes a vapor refrigerant passageway and a second earth contacting tube provides additional heat transfer with the fast earth contacting tube. Moreover, the earth tap heat exchanger includes a liquid refrigerant insulated passageway positioned within the second earth contacting tube. Each of the earth contacting tubes preferably comprises a thermal conductor, such as copper or a non-metallic material suitable for contact with refrigerant, to transfer heat with surrounding earth and with an adjacent earth contacting tube. The liquid refrigerant passageway and the vapor refrigerant passageway are preferably connected together in fluid communication adjacent lower ends thereof. Multiple vapor refrigerant passageways may be provided by additional earth contacting tubes. Method aspects of the invention are also disclosed.
5562157 HEAT EXCHANGER Hasegawa Etuo; Nagasawa Toshiya; Sumi Shogo Kounan, JAPAN assigned to Nippondenso Co Ltd A laminate type heat exchanger is formed from a plurality of plates and integrally brazed and joined. This heat exchanger includes a joint block, a refrigerant heat-exchanging portion which causes heat exchange between refrigerants, and an evaporating portion which causes heat exchange
between refrigerant and passenger-compartment air. The inventors formulated new index to perform successful integral brazing. A reference volume of a portion is a volume of the portion providing a predetermined amount of heat-receiving surface area of the portion, an index A of the portion is defmed by A=(volume of material of the portion to be heated existing in a reference volume of the portion)/(the reference volume of the portion), and a ratio of an index A1 which is the index A of the fast portion and an index A2 which is the index A of the second portion, i.e., A1/A2 is set within a certain range. Preferably, the certain range of the ratio of A1/A2 is def'med by I/2.2< or =A1/A2< or =2.2. Plate thickness tl of plates forming the refrigerant heat-exchanging portion and plate thickness t2 of plates of the evaporating portion have a relationship that a ratio tl/t2 is set within a range of 0.17< or =tl/t2< or =0.75.
5562861 F L U O R O I O D O C A R B O N BLENDS AS CFC AND H A L O N REPLACEMENTS Nimitz Jonathan; Lankford Lance Albuquerque, NM, UNITED STATES assigned to IKON Corporation A new set of effective, environmentally safe, nonflammable, low-toxicity refrigerants, solvents, foam blowing agents, propellants, and fa'efighting agents is disclosed. The agents are clean, electrically nonconductive, and have short atmospheric lifetimes, zero ozone-depletion potential, and low global warming potentials. The agents comprise at least one fluoroiodocarbon agent satisfying the general formula CaHbBrcCldFeIfNgOh, wherein a is between and including 1 and 8; b is between and including 0 and 2; c, d, g, and h are each between and including 0 and 1; e is between and including 1 and 18; and f i s between and including 1 and 2, either neat or mixed with additives selected from
X
PatentsA LER T
the group consisting of: alcohols, esters, ethers, fluoroethers, hydrocarbons, hydrofluorocarbons, and perfluorocarbons.
5568736 THERMAL
INTER-COOLER
Nivens Jerry W Truth or Consequences, NM, UNITED STATES assigned to Apollo Environmental Systems Corp
The invention comprises a non-restrictive, constant pressure refrigerant recycling and cooling unit that interrupts the normal refrigerant cycle to permit a lower temperature liquid to enter the expansion device, and thus provide a lower temperature, and therefore a lower pressure gas for delivery to the inlet side of the compressor, which acts to reduce the energy requirement and cost to operate the compressor. This reduction in pressure and temperature also results in lower operating costs and lower maintenance costs and utilizes less refrigerant quantity requirements.