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1. WO1996006316 - SELF-ADJUSTING SUPERHEAT VALVE

Publication Number WO/1996/006316
Publication Date 29.02.1996
International Application No. PCT/US1994/010255
International Filing Date 25.08.1994
Chapter 2 Demand Filed 18.03.1996
IPC
F25B 41/06 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION OR SOLIDIFICATION OF GASES
BREFRIGERATION MACHINES, PLANTS, OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
41Fluid-circulation arrangements, e.g. for transferring liquid from evaporator to boiler
06Flow restrictors, e.g. capillary tubes; Disposition thereof
G05D 23/12 2006.01
GPHYSICS
05CONTROLLING; REGULATING
DSYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
23Control of temperature
01without auxiliary power
12with sensing element responsive to pressure or volume changes in a confined fluid
CPC
F25B 2341/062
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
2341Details of ejectors not being used as compression device; Details of flow restrictors or expansion valves
06Details of flow restrictors or expansion valves
062Capillary expansion valves
F25B 2341/0681
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
2341Details of ejectors not being used as compression device; Details of flow restrictors or expansion valves
06Details of flow restrictors or expansion valves
068Expansion valves combined with a sensor
0681the sensor is heated
F25B 2600/21
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
2600Control issues
21Refrigerant outlet evaporator temperature
F25B 2700/21171
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
2700Sensing or detecting of parameters; Sensors therefor
21Temperatures
2117of an evaporator
21171of the fluid cooled by the evaporator
F25B 2700/21175
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
2700Sensing or detecting of parameters; Sensors therefor
21Temperatures
2117of an evaporator
21175of the refrigerant at the outlet of the evaporator
F25B 41/062
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
41Fluid-circulation arrangements, e.g. for transferring liquid from evaporator to boiler
06Flow restrictors, e.g. capillary tubes; Disposition thereof
062Expansion valves
Applicants
  • ALSENZ, Richard, H. [US/US]; US
Inventors
  • ALSENZ, Richard, H.; US
Agents
  • HEIM, Michael, F. ; Conley, Rose & Tayon, P.C. 1850 Texas Commerce Tower 600 Travis Street Houston, TX 77002, US
Priority Data
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) SELF-ADJUSTING SUPERHEAT VALVE
(FR) DETENDEUR A SURCHAUFFE AUTO-REGLABLE
Abstract
(EN)
The present invention discloses an automatic self-adjusting thermally powered expansion valve (22) for controlling the flow of refrigerant to an evaporator (18) of a refrigeration system (10). The valve (22) includes a generally cylindrical interior valve chamber (84) with an inlet port (90) and an outlet port (92) providing a passage for the flow of refrigerant through the valve (22). The flow of refrigerant through the valve (22) is regulated by valve element (98), which moves longitudinally within chamber (84). The valve element (98) includes one or more grooves (100) along the circumference thereof to provide a passage for the refrigerant. The number and size of grooves (100) which align with inlet port (90) and outlet port (92) determine the flow rate of the refrigerant through valve (22). The longitudinal position of the valve element (98) is controlled by force generators (102, 106, 108) and probes (74, 78). The force generators (102, 106) preferably comprise bellows, while force generator (108) comprises a compression spring. As a result, the position of the valve element (98) depends on the fluid pressure in and the size and configuration of, bellows (102, 106), and the spring constant of compression spring (103). As the temperature at probes (74, 78) increase, so too does the pressure in conduits (76, 80) and bellows (102, 106). Fluid pressure within the evaporator coil (20) is communicated through the valve element (98) by passages (112, 114) so that the movement of valve element (98) is not hindered by a fluid pressure differential in the chamber.
(FR)
Détendeur (22) automatique auto-réglable à commande thermique destiné à réguler le flux de réfrigérant alimentant un évaporateur (18) d'un système de refroidissement (10). Ledit détendeur (22) comporte une chambre (84) intérieure généralement cylindrique dotée d'un orifice d'entrée (90) et d'un orifice de sortie (92) qui fournissent un passage pour le flux de réfrigérant s'écoulant à travers le détendeur (22). Le flux de réfrigérant s'écoulant à travers le détendeur (22) est régulé par un élément (98) qui se déplace longitudinalement dans la chambre (84). Ledit élément (98) comporte une ou plusieurs rainures (100) sur sa circonférence, destinées à fournir un passage pour le réfrigérant. Le nombre et la taille des rainures (100) qui s'alignent avec l'orifice d'entrée (90) et l'orifice de sortie (92) déterminent la vitesse d'écoulement du réfrigérant à travers le détendeur (22). La position longitudinale de l'élément (98) est commandée par des générateurs de force (102, 106, 108) et des sondes (74, 78). Les générateurs de force (102, 106) comportent de préférence des soufflets, tandis que le générateur de force (108) comporte un ressort à pression. Il en résulte que la position de l'élément (98) dépend de la pression du fluide dans les soufflets et de la taille et de la configuration desdits soufflets (102, 106), et de la constante de rappel du ressort à pression (103). Lorsque la température augmente au niveau des sondes (74, 78), la pression augmente elle aussi dans les conduits (76, 80) et les soufflets (102, 106). La pression du fluide dans le serpentin (20) d'évaporateur est communiquée à travers l'élément (98) par des passages (112, 114), si bien que le mouvement de l'élément (98) n'est pas entravé par un différentiel de pression de fluide dans la chambre.
Also published as
NZ275541
Latest bibliographic data on file with the International Bureau