Defrosting Or Frost Inhibiting Patents (Class 62/80)
  • Patent number: 8701433
    Abstract: A heat exchanger door system includes a heat exchanger and a first rotatable member, proximate to the heat exchanger, that rotates about an axis of rotation. The system includes a first door member rolled around the rotatable member and movable from a rolled position to an unrolled position in which the first door member covers more of the heat exchanger than when the door member is in the rolled position.
    Type: Grant
    Filed: March 31, 2008
    Date of Patent: April 22, 2014
    Inventor: Michael Cyril Haseldine, Jr.
  • Publication number: 20140096545
    Abstract: A merchandiser system includes a case that has a door and a door heater. The system includes a low temperature refrigeration unit sized to fit within a case compartment and to operably couple to the case to maintain food product within a low temperature range. The system also includes a medium temperature refrigeration unit sized to fit within the compartment and operably couple to the case to maintain food product within a medium temperature range. The system includes a controller in communication with the door heater and is programmed to activate the door heater only in response to the low temperature modular refrigeration unit positioned within the compartment. One of the low temperature refrigeration unit and the medium temperature refrigeration unit is removably coupled to the case within the compartment, and is replaceable by the other refrigeration unit to change the temperature range of the product display area.
    Type: Application
    Filed: March 12, 2013
    Publication date: April 10, 2014
    Inventors: Jony M. Zangari, Oswaldo Carrillo
  • Patent number: 8689573
    Abstract: A refrigerated merchandiser including a case, a refrigeration system, a sensor, and a controller. The refrigeration system is operable in a defrost mode defrosting the evaporator, and a refrigeration mode discharging a refrigerated airflow into the product storage area to refrigerate the product and to maintain the product within a predetermined temperature range without freezing the product, and to receive the refrigerated airflow along a return passageway. The sensor senses one or more defrost conditions of the case. The controller controls the refrigeration system in the refrigeration mode and in the defrost mode, and includes an algorithm for calculating when to initiate the defrost mode and for calculating a duration of the defrost mode. The controller is programmed to vary the refrigeration system between the refrigeration mode and the defrost mode based on the signals indicative of the defrost conditions and the calculations by the algorithm.
    Type: Grant
    Filed: July 13, 2011
    Date of Patent: April 8, 2014
    Assignee: Hussmann Corporation
    Inventors: Jony M. Zangari, Dennis L. Wagner, Mark Schaefer, Dennis L. Dickerson, Scott N. Hixson, William R. North
  • Publication number: 20140069125
    Abstract: Systems, methods, and apparatuses are provided for preventing condensation in refrigerated display cases. A display case can be provided with one or more heater circuits and one or more sensors communicably coupled thereto. The sensor can sense ambient humidity levels, ambient temperature levels, and surface temperature levels. In certain embodiments, dewpoint temperatures may be calculated based on the ambient humidity and temperature levels provided by the sensor. The sensed ambient humidity level, temperature level, surface temperature, or calculated dewpoint can be compared to preset trigger levels and at least one of the heater circuits can be activated if the preset trigger level is violated. Activation of the heater circuit can be for a predetermined amount or percentage of time or at a predetermined voltage level based on the sensed or calculated level or the amount the sensed or calculated level is over the preset trigger level.
    Type: Application
    Filed: September 12, 2013
    Publication date: March 13, 2014
    Applicant: HEATCRAFT REFRIGERATION PRODUCTS LLC
    Inventors: Chandrashekhara S. Chikkakalbalu, Ajay Iyengar
  • Publication number: 20140053581
    Abstract: A cooling apparatus includes a storage compartment, an evaporator to cool air in the storage compartment by evaporating a refrigerant, a compressor to compress the refrigerant evaporated by the evaporator, an air blower to supply the air cooled by the evaporator to the storage compartment and to remove frost formed on the evaporator, a storage temperature sensor to sense a temperature of the storage compartment, a driving unit to drive the compressor and the air blower, and a controller to perform a defrosting operation of operating the air blower to remove frost formed on the evaporator when a cooling operation of cooling the storage compartment is terminated and to perform the cooling operation, wherein the controller defers, when the defrosting operation is being performed, operation of the compressor, even if the temperature of the storage compartment is greater than or equal to the storage upper limit temperature.
    Type: Application
    Filed: August 27, 2013
    Publication date: February 27, 2014
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Sung Ho Cho, Woo Sung Kim, Won Je Lee, Yong Han Kim, Jung Won Park, Seong Wook Jeong, Sang Youl Cha
  • Publication number: 20140053580
    Abstract: Systems and methods are disclosed for water collection from atmospheric moisture in large quantities in uncontrolled outdoor environments where the temperature may be cold and humidity levels low. To extract water from air when the dew point is low, a heat exchanger cools to a point where water vapor is deposited on its surface as ice. The heat exchanger then cycles through a heating phase to melt the ice and generate liquid water. The accumulation of frost is advantageous. Frost accumulation enables water collection when the dew point is low. Disclosed variations enhance efficiency and environmental tolerance.
    Type: Application
    Filed: March 4, 2012
    Publication date: February 27, 2014
    Applicant: ECOLOBLUE, INC.
    Inventors: Wayne Ferreira, Henri-James Tieleman
  • Publication number: 20140033744
    Abstract: Disclosed herein are a cooling apparatus and a control method thereof. The cooling apparatus using latent heat of a refrigerant includes evaporators evaporating the refrigerant, a compressor compressing the evaporated refrigerant to a high pressure, defrosting heaters removing frost accumulated on the evaporators, a driving unit providing driving current selectively to the compressor or the defrosting heaters, and a control unit controlling the driving unit to provide driving current to the compressor in a cooling operation mode and controlling the driving unit to provide driving current to the defrosting heaters in a defrosting operation mode. The cooling apparatus controls the defrosting heaters using a driving circuit controlling the compressor, and thus lowers the manufacturing costs of a refrigerator operated at DC power.
    Type: Application
    Filed: July 31, 2013
    Publication date: February 6, 2014
    Applicant: Samsung Electronics Co., Ltd
    Inventor: Sun Jin KIM
  • Publication number: 20140026600
    Abstract: A climate control system for the interior cabin of an automotive vehicle. The climate control system includes a mode selection device configured for selecting a defrost mode. When the system is in the defrost mode, a controller receives a signal from a humidity sensor indicative of the measured humidity level in the vicinity of the window. The controller compares this measured humidity level with a threshold humidity level and, if the humidity is below the threshold humidity level, the controller stops operation of a compressor being used to dehumidify the air being provided to defrost the window, thereby minimizing possible fogging of the window and increasing the efficiency of the vehicle.
    Type: Application
    Filed: July 25, 2012
    Publication date: January 30, 2014
    Inventor: Erik A. Wippler
  • Publication number: 20130327070
    Abstract: A refrigerated merchandiser including a case defining a product display area supporting product and an evaporator disposed in an air passageway in fluid communication with the product display area via an outlet to direct a refrigerated airflow into the product display area. The merchandiser also includes a control system in communication with and programmed to control the refrigeration system so that the product display area is maintained within a predetermined temperature range. The control system also varies the temperature of the refrigerated airflow through the outlet above an airflow temperature threshold between about 35 degrees Fahrenheit and 41 degrees Fahrenheit at least once during a predetermined time period to avoid formation of frost on the evaporator while maintaining the product display area within the predetermined temperature range.
    Type: Application
    Filed: June 12, 2012
    Publication date: December 12, 2013
    Applicant: HUSSMANN CORPORATION
    Inventors: Brian J. Rees, Simon A. Johnston, Derek R. Lea
  • Patent number: 8601831
    Abstract: A refrigeration machine for a domestic refrigerator includes a compressor, a condenser and an evaporator, which are connected to form a refrigerant circuit, wherein a stop valve is arranged in a refrigerant path from the condenser to the evaporator.
    Type: Grant
    Filed: August 7, 2007
    Date of Patent: December 10, 2013
    Assignee: BSH Bosch und Siemens Hausgeraete GmbH
    Inventors: Panagiotis Fotiadis, Hans Ihle
  • Patent number: 8590326
    Abstract: A refrigeration cycle apparatus 100 includes a first compressor 101, a second compressor 102 provided in parallel with the first compressor 101, a radiator 103 for cooling a refrigerant compressed by the compressors 101 and 102, an expander 104 for recovering power while expanding the refrigerant cooled by the radiator 103, an evaporator 105 for evaporating the refrigerant expanded by the expander 104, a rotation shaft 123 connecting the first compressor 101 to the expander 104 so that the first compressor 101 uses the power recovered by the expander 104, a controller 112 for executing a control including a step of increasing a flow rate of the refrigerant gradually during a defrosting operation in which frost formed on the evaporator 105 is melted by allowing the refrigerant having a high temperature to flow through the evaporator 105.
    Type: Grant
    Filed: October 8, 2008
    Date of Patent: November 26, 2013
    Assignee: Panasonic Corporation
    Inventors: Yuichi Yakumaru, Katsuji Taniguchi, Masaya Honma
  • Publication number: 20130305748
    Abstract: An icephobic coating is disposed on at least a cold side of a condenser in an environmental control system (ECS) of an aircraft. By applying the icephobic coatings to the condenser, the adhesive strength of the ice can be significantly reduced. As a result, it is difficult for ice to stick on the condenser. The vibration in the system and the force of the air flow can then knock the ice particles off of the condenser, resulting in reduced ice buildup.
    Type: Application
    Filed: May 18, 2012
    Publication date: November 21, 2013
    Applicant: HONEYWELL INTERNATIONAL INC.
    Inventors: Sapan N. Shah, Hal J. Strumpf, Adel Elsayed, Vipul Patel
  • Publication number: 20130305749
    Abstract: An energy saving defrost control system for reducing power consumption of an electromechanically controlled refrigerator is provided. The system includes a defrost timer configured to control a compressor according to an established run time, a defrost heater control operatively connected to the defrost timer and configured to activate a defrost heater in response to a timeout by the defrost timer, a DSM module responsive to demand state signals from an associated utility indicative of at least a peak demand and off peak demand state, and a time delay latching relay comprising a timer and configured to switch to one of a low position and a high position based on the demand state signal.
    Type: Application
    Filed: July 24, 2013
    Publication date: November 21, 2013
    Applicant: General Electric Company
    Inventor: John K. Besore
  • Publication number: 20130255283
    Abstract: An automated, ultra-low temperature freezer having multiple structural features that reduce heat transfer into the freezer, protect its internal mechanical devices against low temperature mechanical binding of their movements, allow defrosting and autoclaving as a result of only minimal changes to the conventional CO2 emergency backup system. A group of freezers are arranged so they can simultaneously provide an HVAC function. A vial management system allows biological samples or vials to be automatically placed in and recovered from the freezer and associates the temperature history with each sample or vial that it was subjected to during its storage.
    Type: Application
    Filed: February 27, 2013
    Publication date: October 3, 2013
    Applicant: GLOBAL COOLING, INC.
    Inventor: David M. Berchowitz
  • Publication number: 20130247598
    Abstract: A method for controlling the operation of a transport refrigeration system to limit current drawn by a compressor powered by AC electric current includes the steps of: (a) determining whether an ambient temperature in which the refrigeration unit is operating has been greater than a set point ambient temperature for a first time period; (b) determining whether the refrigeration unit has been operating in a temperature pulldown mode; (c) determining whether the AC electric current is equal to or exceeds a preset maximum current limit; (d) determining whether a time period between a last defrost cycle and a next previous defrost cycle is less than fifteen minutes; and (e) if the determination is YES in both of step (a) and step (b) and is also YES in at least one of step (c) and step (d), reducing the preset maximum current limit to a reset maximum current limit.
    Type: Application
    Filed: November 7, 2011
    Publication date: September 26, 2013
    Applicant: Carrier Corporation
    Inventors: Scott D. Fulmer, Donald B. Hotaling, Mark J. Perkovich
  • Publication number: 20130239596
    Abstract: An air conditioner and a method for controlling the same for securing reliability and increasing efficiency are provided. The air conditioner and the method of controlling the same detect freezing occurring in the heat exchanger of the outdoor unit, determine a time of the defrosting operation according to a freezing degree such that the defrosting operation is performed, thereby preventing cooling/heating operation efficiency and capability due to a frequent defrosting operation from being deteriorated. The air conditioner and the method of controlling the same according to the present invention provide comfort of a predetermined level to the user to solve deterioration of convenience, and remove freezing due to a defrosting operation to thereby improve efficiency during cooling/heating operations.
    Type: Application
    Filed: February 27, 2013
    Publication date: September 19, 2013
    Applicant: LG Electronics Inc.
    Inventors: Daehee Kim, Joonkeol Song, Sunghwan Kim
  • Publication number: 20130227973
    Abstract: Disclosed therein are a heat pump system for a vehicle and a method of controlling the heat pump system, which determines that frosting begins on an exterior heat exchanger and carries out a defrosting control if a difference value between outdoor temperature and refrigerant temperature of an outlet side of the exterior heat exchanger is above a frosting decision temperature in a heat pump mode, thereby increasing frost-prevention and defrosting effects and enhancing heating performance and stability of the system because the system recognizes the beginning of frosting on the exterior heat exchanger at a proper time so as to carry out the defrosting control.
    Type: Application
    Filed: March 1, 2013
    Publication date: September 5, 2013
    Applicant: Halla Climate Control Corporation
    Inventors: Sungho KANG, Hakkyu KIM, Youngho CHOI, Jungjae LEE, Taeeun KIM, Jeonghun SEO
  • Patent number: 8511102
    Abstract: A method for defrost control of a refrigerator having a refrigeration and defrost system that includes a compressor, an evaporator, an evaporator fan and a heater. The refrigerator also has a control system to control the operation of the refrigerator. The method includes stopping the compressor operation; starting a defrost process; starting the heater; maintaining a start state over a preset period of time; closing off the heater; and starting the compressor. After starting the compressor and before the evaporator fan is started to perform the refrigeration operation, the evaporator fan is operated at least once briefly and intermittently.
    Type: Grant
    Filed: April 17, 2009
    Date of Patent: August 20, 2013
    Assignee: BSH Bosch und Siemens Hausgeraete GmbH
    Inventors: Junhong Feng, Xiaotian Zhou, Qiwu Zhu, Weizhong Zhu
  • Publication number: 20130199218
    Abstract: An icing protection system comprises a fuel cell, an evaporative cooling system, a thermal deicing device, a control unit and a device for measuring the pressure in the evaporative cooling system. The evaporative cooling system is in thermal contact with the fuel cell and with the thermal deicing device in order to conduct heat from the fuel cell to the thermal deicing device. The control unit controls the electrical power demanded from the evaporatively cooled fuel cell in dependence on a deviation of the pressure measured by the pressure measuring device from a predetermined NOMINAL pressure. In this way, an energetically very efficient and very well controllable icing protection system is made available that can be operated without bleed air supplied by engines or electrical energy provided by engine generators.
    Type: Application
    Filed: January 30, 2013
    Publication date: August 8, 2013
    Applicant: AIRBUS OPERATIONS GMBH
    Inventor: AIRBUS OPERATIONS GMBH
  • Publication number: 20130192280
    Abstract: A refrigerator according to the present invention includes a compressor compressing a coolant, a condenser condensing the coolant compressed in the compressor, an expander through which the coolant condensed in the condenser passes, an evaporator evaporating the coolant expanded in the expander and cooling an inside of the refrigerator, a defroster defrosting the evaporator, a coolant adjusting valve adjusting the coolant flowing from the condenser to the evaporator, and a controller driving the compressor and turning on the defroster after closing the coolant adjusting valve. The refrigerator may minimize power consumed for defrosting and the defrosting time.
    Type: Application
    Filed: January 30, 2013
    Publication date: August 1, 2013
    Applicant: LG ELECTRONICS INC.
    Inventor: LG ELECTRONICS INC.
  • Publication number: 20130139527
    Abstract: A method is provided for controlling a heating and air conditioning system in a vehicle. The evaporator of the air conditioner is switched off below a predefined external temperature threshold in order to prevent the risk of icing. The external temperature threshold for switching off the evaporator as a function of the external temperature, is also defined, preferably variably, below the freezing point.
    Type: Application
    Filed: January 29, 2013
    Publication date: June 6, 2013
    Applicant: BAYERISCHE MOTOREN WERKE AKTIENGESELLSCHAFT
    Inventor: BAYERISCHE MOTOREN WERKE AKTIENGESELLSCHAFT
  • Publication number: 20130104576
    Abstract: An air conditioner may include a plurality of indoor units and a plurality of outdoor units connected to the plurality of indoor units. Each of the plurality of outdoor units may include a plurality of outdoor heat exchangers. Each of the outdoor heat exchangers may include a plurality of heat exchanger parts. When a defrosting operation condition is satisfied during a heating operation, indicating that a defrosting operation should be performed the plurality of heat exchanger parts of the plurality of outdoor heat exchangers may successively perform the defrosting operation.
    Type: Application
    Filed: March 29, 2012
    Publication date: May 2, 2013
    Inventor: Jaewan LEE
  • Publication number: 20130104577
    Abstract: An apparatus comprising a cooling chamber comprising a cooling unit for cooling uranium hexafluoride in the chamber; and a heater comprising a first region inside the cooling chamber arranged to defrost the cooling unit; and a second region outside the cooling chamber arranged to receive heating fluid cooled in the first region and to heat the received fluid. A method of defrosting a cooling unit is also described.
    Type: Application
    Filed: October 26, 2012
    Publication date: May 2, 2013
    Applicant: URENCO LIMITED
    Inventor: URENCO LIMITED
  • Publication number: 20130098075
    Abstract: A high performance refrigerator includes a cabinet with a refrigerated interior, a refrigeration fluid circuit having an evaporator located within an insulated evaporator compartment outside the cabinet, and at least one damper that opens to permit air circulation from the refrigerated interior through the evaporator compartment. The refrigerator also includes a eutectic member configured to melt at an operating temperature of the refrigerator. The evaporator cools the refrigerated interior to a temperature below the operating temperature so that the eutectic member melts to cool the refrigerated interior or the evaporator compartment during a defrost cycle. The insulated evaporator cover limits heat transfer into the refrigerated interior during the defrost cycle to avoid temperature spikes in the refrigerated interior.
    Type: Application
    Filed: October 16, 2012
    Publication date: April 25, 2013
    Applicant: THERMO FISHER SCIENTIFIC (ASHEVILLE) LLC
    Inventor: Thermo Fisher Scientific (Asheville) LLC
  • Publication number: 20130098074
    Abstract: A high performance refrigerator includes a cabinet with a refrigerated interior, an insulating cover separating a portion of the cabinet from the refrigerated interior, and a refrigeration fluid circuit having an evaporator located within the portion of the cabinet separated by the insulating cover from the refrigerated interior. The refrigerator also includes a controller that commands the refrigerator to perform a defrosting cycle when the evaporator coil requires defrosting. This defrosting cycle includes closing dampers in the insulating cover during the defrosting of the evaporator coil, thereby keeping the refrigerated interior thermally isolated from the evaporator during the defrost cycle. The controller is also operable to stop operation of a defrost heater when the evaporator reaches a first target temperature above the freezing point of water, and to re-open the dampers when the evaporator reaches a second target temperature above the freezing point of water.
    Type: Application
    Filed: October 16, 2012
    Publication date: April 25, 2013
    Applicant: THERMO FISHER SCIENTIFIC (ASHEVILLE) L.L.C.
    Inventor: Thermo Fisher Scientific (Asheville) L.L.C.
  • Publication number: 20130086929
    Abstract: A method is disclosed for controlling initiation of a defrost cycle of an evaporator heat exchanger of a refrigeration system operatively associated with a refrigerated transport cargo box. The method includes the steps of establishing an return air-saturation temperature differential equal to the difference of a sensed air temperature of an air flow returning from the cargo box to pass over the heat exchange surface of the evaporator heat exchanger minus a refrigerant saturation temperature of a flow of refrigerant passing through the evaporator heat exchanger, comparing the return air-saturation temperature differential to a set point threshold defrost temperature differential, and if the return air-saturation temperature differential exceeds the set point threshold defrost temperature differential, initiating a defrost cycle for defrosting the evaporator heat exchanger.
    Type: Application
    Filed: June 29, 2011
    Publication date: April 11, 2013
    Inventor: Ramond L. Senf, JR.
  • Publication number: 20130086928
    Abstract: A refrigerator includes a low-temperature storage compartment damper to control supply of cool air to a low-temperature storage compartment, a high-temperature storage compartment damper to control supply of hot air to a high-temperature storage compartment, and a controller to control the low-temperature storage compartment damper to be opened and the high-temperature storage compartment damper to be closed while controlling a compressor and blowing fan to be driven so that the temperature of the low-temperature storage compartment reaches a low set temperature, to control the driving of the compressor and blowing fan to be stopped and the low-temperature storage compartment damper to be closed when the temperature of the low-temperature storage compartment reaches the low set temperature, and to control a defrosting heater and the blowing fan to be driven and the high-temperature storage compartment damper to be opened when the supply of cool air is stopped.
    Type: Application
    Filed: October 5, 2012
    Publication date: April 11, 2013
    Applicant: Samsung Electronics Co., Ltd.
    Inventor: Samsung Electronics Co., Ltd.
  • Patent number: 8417386
    Abstract: A system and a method are provided for monitoring a condition and selectively executing a certification defrost algorithm for a heating, ventilation, and air conditioning (HVAC) system in response to the status of the monitored condition. A system and a method are provided for selectively operating a certification defrost algorithm in parallel to a field defrost algorithm. A system and a method are also provided for causing a controller to execute a first algorithm and for causing the controller to selectively execute a second algorithm while also executing the first algorithm where each of the first algorithm and the second algorithm are configured to selectively cause the HVAC system to operate in a defrost mode.
    Type: Grant
    Filed: November 17, 2008
    Date of Patent: April 9, 2013
    Assignee: Trane International Inc.
    Inventors: Jonathan D. Douglas, Darryl E. Denton, Alan D. Marble, Kevin B. Mercer, Gary L. Sapp, Kristen L. Schaefer, Steven A. Tice
  • Patent number: 8402777
    Abstract: An intelligent defrosting control for an air conditioner is disclosed, which comprises the following steps: setting a standard air pressure value; placing a high-pressure sensor on the exhaust pipe of the compressor of the air conditioner to measure the air pressure; When the air pressure measured by the high-pressure sensor is lower than the standard air pressure value, said air conditioner begins to come into the defrosting mode; otherwise, said air conditioner working in previous mode.
    Type: Grant
    Filed: November 24, 2006
    Date of Patent: March 26, 2013
    Assignee: Free Electric Appliances Inc. of Zhuhai
    Inventors: Su Yuhai, Liu Guiping, Sun Changquan
  • Publication number: 20130042638
    Abstract: The refrigerator of the present invention comprises: a refrigeration cycle composed of a compressor, a condenser and an expansion unit; an evaporator for evaporating a refrigerant which passes through the expansion unit; a heating unit for providing the heat for defrosting the evaporator; and a frost sensor unit which is provided at one side of the evaporator for sensing the amount of frost on the evaporator, and is characterized in that an operation of the frost sensor unit is started on the basis of whether operation conditions of the frost sensor unit are recognized and the heating unit selectively generates the heat according to the sensed result of the frost sensor unit. According to one embodiment of the present invention, the amount of frost on the evaporator is easily determined by the operation of the frost sensor unit and the evaporator is effectively defrosted according to the amount of frost determined thereby.
    Type: Application
    Filed: February 17, 2011
    Publication date: February 21, 2013
    Applicant: LG ELECTRONICS INC.
    Inventors: Yonghwan Eom, Hoyoun Lee, Youngjin Kim
  • Publication number: 20130031917
    Abstract: A heat exchanging apparatus and an associated method are provided so as to permit a heat exchanger to be defrosted without being taken out of service. A defrostable heat exchanging apparatus includes a heat exchanger configured to cool gas flowing there through by heating a liquid also passing there through. The defrostable heat exchanging apparatus also includes a blockage positionable upstream of the heat exchanger with respect to the liquid so as to reduce flow of the liquid through a portion of the heat exchanger aligned with the blockage relative to the flow of the liquid through other portions of the heat exchanger. The defrostable heat exchanging apparatus may also include a positioning mechanism for moving the blockage relative to the heat exchanger.
    Type: Application
    Filed: August 5, 2011
    Publication date: February 7, 2013
    Applicant: THE BOEING COMPANY
    Inventor: Steven George Mackin
  • Patent number: 8365542
    Abstract: The present invention provides an energy efficient air conditioner that can provide a continuous supply of air at dew point that is several degrees Celsius below zero, without requiring a defrost cycle. The air conditioner in accordance to present invention comprises a plurality of cooling coils with interconnecting refrigerant piping, refrigeration circuit consisting of compressor and condenser coils, control circuit and one or more electric motor driven centrifugal fan. The present invention uses two cooling systems. The first cooling system having single coil cools the air to a temperature just above zero deg. C., say four deg. C. so that the second stage gets a steady supply of cold air. The second stage has two coils, each being half the size of the first stage coil, thus taking half the air from it so that all the air from stage 1 passes through stage 2. In operation, only one coil of the second stage is active arid chills the air going through it to say minus 14 Deg. C.
    Type: Grant
    Filed: March 15, 2010
    Date of Patent: February 5, 2013
    Inventor: Surendra Himatlal Shah
  • Patent number: 8365541
    Abstract: A refrigerator and a method of operating a refrigerator to determine the time at which to initiate a defrost cycle is provided. Changes in the voltage provided to an evaporator fan are used to determine and/or predict when to initiate a defrost cycle. Adjustments to the timing of the defrost cycle can be made based on known periods of peak energy demand and/or the increased costs associated with operating the defrost cycle during such peak energy demand periods.
    Type: Grant
    Filed: November 4, 2010
    Date of Patent: February 5, 2013
    Assignee: General Electric Company
    Inventors: Kenneth Joseph Hanley, Jeffrey Martin Wood, Martin Christopher Severance, Jason Andrew May
  • Publication number: 20130019616
    Abstract: A door for a refrigerated merchandiser including a case that defines a product display area. The door includes a frame and a first glass pane coupled to the frame. The first glass pane has heat-absorbing glass and is configured to be positioned adjacent an ambient environment surrounding the refrigerated merchandiser to absorb radiation from the ambient environment. The door also includes a second glass pane coupled to the frame and configured to be positioned adjacent the product display area. The second glass pane includes a conductive coating. The door further includes a third glass pane positioned between and spaced from the first glass pane and the second glass pane, and has a low emissivity coating.
    Type: Application
    Filed: July 20, 2011
    Publication date: January 24, 2013
    Applicant: HUSSMANN CORPORATION
    Inventor: Craig Steven Reichert
  • Publication number: 20130014521
    Abstract: Disclosed is a system for and a method of reducing and/or avoiding ice formation inside a cooling space (41) of a refrigerated transport container (1) comprising at least a cooling unit (40) and an evaporator (16) located in the cooling space (41), where the cooling unit (40) comprises at least an intermittently operated compressor (6) operated between a first active state and a second less active state, and wherein the method comprises: reducing and/or avoiding ice formation inside the cooling space (41), when the system is operated at a temperature setpoint where a potential risk of ice build-up on the external surface of the evaporator exists, by altering a cycling of the compressor (6) between the first active state and the second less active state such that the number of melting-refreezing cycles at an external surface of the evaporator is reduced.
    Type: Application
    Filed: July 12, 2011
    Publication date: January 17, 2013
    Applicant: A.P. MOLLER - MAERSK A/S
    Inventors: Leijn Johannes Sjerp Lukasse, Janneke Emmy De Kramer-Cuppen
  • Publication number: 20120318006
    Abstract: Embodiments of apparatus, transport refrigeration units, and methods for operating the same can control defrost operations for a refrigerant vapor compression system. Embodiments can provide control for transitioning a refrigerant vapor compression system into and out of a defrost mode.
    Type: Application
    Filed: March 3, 2011
    Publication date: December 20, 2012
    Applicant: CARRIER CORPORATION
    Inventors: Lucy Yi Liu, Suresh Duraisamy, Gilbert B. Hofsdal
  • Publication number: 20120279237
    Abstract: An auxiliary heater control device can be readily attached to a hot water heating system configured with a simple water circuit without a hot water storage tank, and is capable of preventing freezing of circulating water such that use of an auxiliary heater is minimized. When a sensed temperature tS sensed by a temperature sensor is in a range, a control device increases a rotational speed of a circulation pump. When the sensed temperature tS is in a range, the control device increases the rotational speed of the circulation pump and lowers an operating frequency of a compressor. When the sensed temperature tS is in a range, the control device increases the rotational speed of the circulation pump, lowers the operating frequency of the compressor, and activates an auxiliary heater.
    Type: Application
    Filed: November 25, 2009
    Publication date: November 8, 2012
    Applicant: Mitsubishi Electric Corporation
    Inventors: Takahiro Ushijima, Kazutaka Suzuki, Koji Matsuzawa, Nobuaki Uehara
  • Publication number: 20120266615
    Abstract: Adaptable evaporator defrost logic is employed in a refrigeration system to detect a build-up of ice on the evaporator. In response to the detected build-up of ice, a defrost operation is initiated that includes decreasing the speed of the compressor. At the end of the defrost operation, the adaptable evaporator defrost logic determines whether the defrost operation was a success. If the defrost operation was a success, then normal operation is resumed. If the defrost operation was not a success, then the defrost operation is modified by turning the compressor off and extending a duration of the defrost operation.
    Type: Application
    Filed: April 21, 2011
    Publication date: October 25, 2012
    Applicant: HAMILTON SUNDSTRAND CORPORATION
    Inventors: Kodjovi Coussey, Richard Rusich, Tejendra Patel, Anson Stark Coolidge
  • Publication number: 20120266616
    Abstract: A multi type air conditioner is provided that may include a plurality of indoor devices, each comprising an indoor heat exchanger, and a plurality of outdoor devices connected to the plurality of indoor devices, each comprising an outdoor heat exchanger. When a defrosting operation condition is satisfied during a heating operation, the plurality of outdoor devices may successively perform a defrosting operation.
    Type: Application
    Filed: March 20, 2012
    Publication date: October 25, 2012
    Inventors: Hoki LEE, Sanghun Lee
  • Patent number: 8291718
    Abstract: A method includes providing a standard supply of electrical power to a defrost heater during a standard defrost cycle for a refrigeration system of an appliance, detecting a high energy demand period during the standard defrost cycle, and enabling a reduced consumption of electrical power by the defrost heater in a low power defrost cycle.
    Type: Grant
    Filed: September 2, 2010
    Date of Patent: October 23, 2012
    Assignee: General Electric Company
    Inventors: Brent Alden Junge, Joseph Thomas Waugh, Jeffrey Wood
  • Publication number: 20120227423
    Abstract: A system for an ice merchandiser having a compressor in a compressor enclosure to cool the ice merchandiser includes a sensor disposed within the ice merchandiser, and a communications component disposed within the compressor enclosure and coupled to the sensor to receive signals from the sensor representative of the amount of ice in the ice merchandiser, wherein the communications component is configured to convert the received signals to a digital format and publish the signals via a network connection.
    Type: Application
    Filed: March 9, 2012
    Publication date: September 13, 2012
    Applicant: Spinnaker Process Instruments
    Inventors: Thomas H. Johnson, Carrol E. Johnson
  • Patent number: 8261565
    Abstract: A cooling system for transferring heat from a heat load to an environment has a volatile working fluid. The cooling system includes first and second cooling cycles that are thermally connected to the first cooling cycle. The first cooling cycle is not a vapor compression cycle and includes a pump, an air-to-fluid heat exchanger, and a fluid-to-fluid heat exchanger. The second cooling cycle can include a chilled water system for transferring heat from the fluid-to-fluid heat exchanger to the environment. Alternatively, the second cooling cycle can include a vapor compression system for transferring heat from the fluid-to-fluid heat exchanger to the environment.
    Type: Grant
    Filed: December 2, 2004
    Date of Patent: September 11, 2012
    Assignee: Liebert Corporation
    Inventors: Steven A Borror, Franklin E DiPaolo, Thomas E Harvey, Steven M Madara, Reasey J Mam, Stephen C Sillato
  • Publication number: 20120198863
    Abstract: A refrigeration appliance includes a storage compartment. An evaporator cools the storage compartment. A defrost heater is associated with the evaporator. A temperature sensor senses an evaporator temperature and generates a temperature signal based on the evaporator temperature. A controller receives the temperature signal and generates a defrost heater power control signal. A power supply receives the defrost heater power control signal and controls a power level supplied to the defrost heater based on the defrost heater power control signal. A first power level is supplied to the defrost heater during a first heating interval of a defrosting operation, and, based on an evaporator temperature rise occurring during the first heating interval, the controller adjusts the defrost heater power control signal such that an adjusted power level is supplied to the defrost heater during a second heating interval of the defrosting operation.
    Type: Application
    Filed: February 7, 2011
    Publication date: August 9, 2012
    Applicant: ELECTROLUX HOME PRODUCTS, INC.
    Inventor: David L. Hall
  • Publication number: 20120198864
    Abstract: A system, apparatus, and method for determining when an amount of ice formed on an evaporator or evaporator grid has reached a predetermined size are illustrated. An acoustic transmitter an acoustic transmitter positioned proximate to the evaporator channels acoustic signals emanating from the evaporator or evaporator grid to an acoustic sensor, which generates an electronic signal indicative of the acoustic signal. A receiver module coupled to the acoustic sensor is configured to receive the electronic signal and determine that ice formed on the evaporator has reached a predetermined size based on the electronic signal.
    Type: Application
    Filed: February 8, 2012
    Publication date: August 9, 2012
    Applicant: CONTROL PRODUCTS, INC.
    Inventors: Richard Rosenlund, Gary Olson, Christian Berghoff, Laura Berghoff
  • Publication number: 20120192577
    Abstract: In at least some embodiments, an air handler includes a coil and a fan. The air handler also includes an auxiliary heat source having a plurality of heat elements. The auxiliary heat source implements a wear-leveling algorithm to cycle use of the heat elements over multiple auxiliary heat cycles.
    Type: Application
    Filed: January 28, 2011
    Publication date: August 2, 2012
    Applicant: TRANE INTERNATIONAL INC.
    Inventors: Dean Alan Drake, Daniel John Blair
  • Publication number: 20120180505
    Abstract: A heat pump system is operable in winter mode and/or summer mode, and may be selectively operated in a defrost mode or cycle. The system includes an energy recovery module that receives and conditions air in a regeneration air channel. A pre-processing module is positioned downstream of the energy recovery module. The pre-processing module receives and heats air from the energy recovery module. A regeneration air heat exchanger is positioned downstream of the pre-processing module. The regeneration air heat exchanger receives and conditions air from the pre-processing module. The pre-processing module heats the air from the energy recovery module to increase efficiency of the regeneration air heat exchanger. During the defrost mode, a loop of regeneration air may be recirculated between the supply air channel and the regeneration air channel in order to defrost the regeneration air heat exchanger.
    Type: Application
    Filed: January 16, 2012
    Publication date: July 19, 2012
    Applicant: Venmar CES, Inc.
    Inventors: Manfred Gerber, Can Wen Rong
  • Publication number: 20120159973
    Abstract: The invention provides a condensate drain assembly comprising one or more reservoirs, a conduit, and a port defining an inlet to a drip channel. The reservoir is preferably constructed to have a floor that is shaped in a manner that allows the collected condensate to be directed to the conduit. For example, the floor may be partially concave and defined by a highest point at an inside wall of the reservoir that is about opposite to the entrance to the conduit and a lowest point at a bottom of the entrance to the conduit. Additionally, the floor at the entrance to the conduit may be further defined by a cone that is open at a top and a side entering the conduit to allow the condensate to be funneled to the conduit from the reservoir.
    Type: Application
    Filed: November 21, 2011
    Publication date: June 28, 2012
    Inventors: Donald Kirner, Joan M. Kirner
  • Publication number: 20120102984
    Abstract: A refrigerator and a dehumidification control method thereof to effectively perform both temperature compensation and dehumidification so as to prevent formation of dewdrops in a refrigerating compartment of the refrigerator. The control method includes detecting a temperature of outside air around the refrigerator to judge whether or not the detected temperature corresponds to a low-temperature mode requiring dehumidification, heating a refrigerating compartment by operating a refrigerating compartment heater and a refrigerating compartment fan for dehumidification if the low-temperature mode is judged, cooling the refrigerating compartment by operating a compressor while continuously operating the refrigerating compartment fan, and simultaneously cooling and heating the refrigerating compartment to enable simultaneous implementation of temperature compensation by heating of the refrigerating compartment and dehumidification by cooling of the refrigerating compartment.
    Type: Application
    Filed: October 26, 2011
    Publication date: May 3, 2012
    Applicant: SAMSUNG ELECTRONICS CO., LTD
    Inventors: Yong Han Kim, Kook Jeong Seo, Jung Won Park
  • Patent number: 8161758
    Abstract: A method of defrosting a eutectic plate of a refrigeration system involves activating a defrost system when a power source is connected to the refrigeration system. The defrost system is operated for all or a portion of a defrost cycle and is then deactivated. The initiation of a subsequent defrost cycle is prevented until the power source has been disconnected from the refrigeration system for at least a selected amount of time. A defrost system may include a controller programmed to carry out the method and automatically initiate a series of defrost cycles.
    Type: Grant
    Filed: February 17, 2009
    Date of Patent: April 24, 2012
    Assignee: Dole Refrigerating Company
    Inventors: Bruce C. Bailey, John W. Cook
  • Patent number: 8151584
    Abstract: When during a first action of a refrigeration system the internal cold storage temperature is held at a desired temperature by an evaporator, the refrigeration system performs a second action of increasing the cooling capacity of the evaporator to decrease the internal cold storage temperature. When during the second action the internal cold storage temperature reaches a minimum temperature Tmin, the refrigeration system stops a compressor and performs a third action. When during the third action the internal cold storage temperature reaches a maximum temperature Tmin, the refrigeration system drives the compressor and performs the first action.
    Type: Grant
    Filed: July 20, 2006
    Date of Patent: April 10, 2012
    Assignee: Daikin Industries Ltd.
    Inventors: Shigeto Tanaka, Noriyasu Kawakatsu