Defrosting Or Frost Inhibiting Patents (Class 62/80)
  • Patent number: 10488099
    Abstract: A frost monitor for HVAC&R systems detects efficiency degradations indicative of coil icing or frosting conditions by modeling compressor input power. The model uses temperature and compressor input power parameter measurements to predict expected compressor input power parameter values. Efficiency degradations are detected by comparing compressor power or current as predicted by the model against measured power or current. Deviations of the measured power parameter values from the predicted power parameter values by a predefined threshold reflect efficiency degradations that may be due to ice or frost accumulation on system coils. Such efficiency degradations may then be used to initiate a defrost cycle in the system.
    Type: Grant
    Filed: February 22, 2018
    Date of Patent: November 26, 2019
    Assignee: Schneider Electric USA, Inc.
    Inventors: Paul R. Buda, Scott R. Brown
  • Patent number: 10436497
    Abstract: A no-frost refrigeration appliance has an interior which is divided by a partition into an evaporator chamber and a storage chamber. The evaporator chamber accommodates an evaporator and a defrost heater. The storage chamber is cooled by the evaporator chamber. The partition and the evaporator are mutually independently attached to walls of the interior. The defrost heater is not connected to the evaporator and is fastened to the partition.
    Type: Grant
    Filed: October 18, 2017
    Date of Patent: October 8, 2019
    Assignee: BSH Hausgeraete GmbH
    Inventor: Ulrich Kriegsmann
  • Patent number: 10215480
    Abstract: A method for controlling a refrigerating unit that includes the steps of providing a freezing compartment, a user interface and a refrigeration circuit with a compressor; and setting a controlling routine through the user interface for avoiding freezer burns on food products to be stored in the freezing compartment, upon the setting changing the set temperature of the freezing compartment to a value from 2° C. to 10° C. lower than the previously set value, and changing the on/off control or the cooling capacity of the compressor so that temperature oscillations in the freezing compartment are limited to a range from 1° C. to 0.1° C.
    Type: Grant
    Filed: February 6, 2018
    Date of Patent: February 26, 2019
    Assignee: Whirlpool Corporation
    Inventors: Carolina Biotti, Raffaele Paganini, Sankara Pandian
  • Patent number: 10183544
    Abstract: Disclosed herein is a heat pump system for a vehicle having a battery module and an electric module. The heat pump system includes: a first cooling line connected to the battery module and having a coolant flowing therein; a chiller disposed on the first cooling line and connected to a refrigerant line of an air conditioning system through a connection line, and exchanging heat between a coolant selectively introduced therein and a refrigerant to control a temperature of the coolant; a cooling system including a radiator connected to a cooling line and a first pump circulating the coolant along the second cooling line so as to cool an electric module, and connected to the first cooling line through a first valve; and a bypass line selectively connecting the connection line and the refrigerant line to each other through a second valve provided on the refrigerant line.
    Type: Grant
    Filed: December 5, 2016
    Date of Patent: January 22, 2019
    Assignee: HYUNDAI MOTOR COMPANY
    Inventors: Jae Yeon Kim, Jai Young An, Myunghwan Kim, Wan Je Cho, Yeon Ho Kim, Yong Hyun Choi, Tae Han Kim
  • Patent number: 10113783
    Abstract: An air conditioning machine is provided by which refrigerant collected into an outdoor heat exchanger is suppressed from counter-flowing through a discharge hole of a compressor toward a side of an indoor heat exchanger after the end of a pump down operation. The air conditioning machine includes a refrigerant circuit, a refrigerant leakage sensor that senses leakage of the flammable refrigerant from the refrigerant circuit, and a control unit that carries out a pump down operation for accumulating the flammable refrigerant in the outdoor heat exchanger when the leakage of the flammable refrigerant is sensed. At the end of the pump down operation, the pump down operation control unit controls the compressor so that the compression member stops at a position where the compression member overlaps at least a portion of the discharge hole when viewed in an axial direction of the cylinder chamber.
    Type: Grant
    Filed: June 29, 2016
    Date of Patent: October 30, 2018
    Assignee: Daikin Industries, Ltd.
    Inventor: Motoki Takagi
  • Patent number: 9211954
    Abstract: The invention relates to an air supply system of an aircraft, in particular of a passenger aircraft, which comprises a fresh air system, through which fresh air can be supplied to an aircraft cabin, a circulating air system, which is coupled to the fresh air system and through which used cabin air can be supplied to the fresh air system, a cooling air system for cooling an air conditioning system of the aircraft disposed in the fresh air system, and a ventilation system coupled to the cooling air system for ventilating an installation space of the air conditioning system. The air supply system includes a device for fluidically coupling the cooling air system and the ventilation system. The device is disposed and configured inside the fuselage of the aircraft such that the air in one system can be driven through the air flow in the other system. The invention also relates to a method for mixing two air streams in an air supply system of this kind of an aircraft.
    Type: Grant
    Filed: August 31, 2007
    Date of Patent: December 15, 2015
    Assignee: Airbus Operations GmbH
    Inventor: Jan Barkowsky
  • Patent number: 9170628
    Abstract: An energy-savings control system can control the showcase, refrigerator and freezer so that they can run with the reduced energy consumption by responding to the electric current values flowing in each respective one of the showcase, etc. A freezing-machine is provided in each respective one of the showcase, refrigerator and freezer in which the electric current values flowing in the freezing-machine may be detected at time intervals of every one minute, and the average electric current values during the continuous time period of 30 minutes may be computed from the electric current values as detected above. If it is determined that the freezing-machine's operating rate as computed above is greater than the freezing-machine's predetermined operating rate, the freezing-machine installed therein may be controlled so that the electromagnetic valve can be switched to its opened position.
    Type: Grant
    Filed: October 28, 2011
    Date of Patent: October 27, 2015
    Assignee: TECHNOMIRAI CO., LTD.
    Inventor: Kazuo Miwa
  • Patent number: 9165690
    Abstract: A method for preparing a cavity loaded with wet radioactive elements for dry storage, the method including: connecting a condensing module, a vacuum module, and a gas circulator module to the cavity so as to form a hermetically sealed closed-loop path that includes the cavity; filling the closed-loop path with a non-reactive gas; circulating the non-reactive gas through the closed-loop path until the condensing module is no longer removing substantial amounts of water from the circulating non-reactive gas, wherein the vacuum module is sealed off from the closed-loop path during the circulating; discontinuing the circulation of the non-reactive gas through the closed-loop path; fluidly coupling the vacuum module to the cavity and fluidly isolating the cavity and the vacuum module; and applying a vacuum pressure to the cavity via the vacuum module so as to create a sub-atmospheric pressure within the cavity.
    Type: Grant
    Filed: October 22, 2013
    Date of Patent: October 20, 2015
    Inventors: Krishna P. Singh, John D. Griffiths
  • Patent number: 9115916
    Abstract: A method of calculating net sensible cooling capacity of a cooling unit includes measuring a discharge pressure from of fluid from a compressor and a suction pressure from an evaporator, calculating a condensing temperature of fluid flowing from the compressor and an evaporating temperature of fluid flowing from the evaporator, calculating a mass flow rate of fluid flowing from the compressor, calculating enthalpy of fluid flowing from the compressor, of fluid flowing from the thermal expansion valve, and of fluid flowing from the evaporator, calculating a mass flow rate of fluid flowing through the hot gas bypass valve, and calculating net sensible cooling capacity. Embodiments of cooling units and other methods are further disclosed.
    Type: Grant
    Filed: November 16, 2012
    Date of Patent: August 25, 2015
    Assignee: SCHNEIDER ELECTRIC IT CORPORATION
    Inventors: Ozan Tutunoglu, John H. Bean, Jr.
  • Patent number: 9080798
    Abstract: A method of controlling a refrigerated merchandiser including a plurality of display case modules each having a separate refrigeration circuit with a compressor and an evaporator. The method includes selectively starting and stopping a first compressor of a first refrigeration circuit having a first evaporator associated with a first display case module to regulate a temperature in a product display area of the first display case module, and selectively starting and stopping a second compressor of a second refrigeration circuit having a second evaporator associated with a second display case module to regulate a temperature in a product display area of the second display case module. The method also includes controlling the first refrigeration module and the second refrigeration module based on a heat load of the merchandiser and a predetermined number of start/stop cycles of each of the first compressor and the second compressor within a given time period.
    Type: Grant
    Filed: November 7, 2012
    Date of Patent: July 14, 2015
    Assignee: Hussmann Corporation
    Inventors: Doron Shapiro, Timothy D. Anderson
  • Patent number: 9046291
    Abstract: A refrigeration appliance, such as a household refrigerator that can include freezer and fresh food compartments, includes operating components that can be controlled so as to allow a user to select for implementation at the refrigeration appliance modes of operation that can optimize the performance of the refrigeration appliance with respect to selected operating objectives. The refrigeration appliance also can include a respective actuating device corresponding to each mode of operation that is available for selective implementation by the user upon the activation of the respective actuating device and a controller configured to direct operating commands to the one or more operating components in response to the activation of a respective actuating device, causing the one or more operating components to operate in a manner so as to selectively implement at the refrigeration appliance the mode of operation corresponding to the respective actuating device activated.
    Type: Grant
    Filed: June 4, 2012
    Date of Patent: June 2, 2015
    Assignee: ELECTROLUX HOME PRODUCTS, INC.
    Inventors: Aaron Meltzer, Kurt Froehlich
  • Publication number: 20150143825
    Abstract: In various implementations, defrost operations may be managed. A change in the temperature of a heat exchanger may be determined. A determination whether to allow a defrost operation may be at least partially based on the determined change in the temperature of the heat exchanger.
    Type: Application
    Filed: November 27, 2013
    Publication date: May 28, 2015
    Applicant: Lennox Industries Inc.
    Inventors: Yi Qu, Pete Hrejsa
  • Patent number: 9032751
    Abstract: A system and method for controlling automatic defrost of a refrigerator device adaptively moves the defrost cycle to a time period of comparatively low compressor activity based on an evaluation of compressor usage over a cyclically recurring time interval. An adaptive defrost controller (ADC) analyzes stored data to develop a profile for compressor activity vs. time. From this profile, high compressor activity times of the time interval are distinguished from low compressor activity times in the time interval and a defrost cycle is scheduled based on the results of the analyzed data.
    Type: Grant
    Filed: October 21, 2009
    Date of Patent: May 19, 2015
    Assignee: Diehl AKO Stiftung & Co. KG
    Inventors: Kevin Lacey, Robert Alvord, Jim Kopec
  • Patent number: 9027356
    Abstract: The biocontainer of the present invention provides a low cost, simple solution of many of the problems encountered during shipping, freezing and thawing of biopharmaceutical materials. The present invention enables a user to monitor the temperature profile of each biopharmaceutical container during the cryogenic process, so as to ensure the integrity of materials within each biocontainer by using a pre-installed and pre-sterilized temperature sensor. In some embodiments, the sensor assembly includes a wireless transmitter and is capable of transmitting information regarding the measured reading. In other embodiments, the sensor assembly includes a processing unit, which determines whether the temperature profile is acceptable. In a further embodiment, an indicator is included, such that the processing unit may indicate whether the biopharmaceutical material has been properly frozen.
    Type: Grant
    Filed: October 18, 2012
    Date of Patent: May 12, 2015
    Assignee: EMD Millipore Corporation
    Inventors: Aaron Burke, Michael Felo, Brian Pereira, Elias Noukas, Dennis Wong
  • Publication number: 20150121912
    Abstract: A novel method of deicing utilizing a fins-on-tubes type evaporator/heat exchanger system that is optimized for energy-saving inductive heating thereof, by configuring it to increase its resistance to a value at which the system's reactance at its working frequency is comparable to its electrical resistance. The system includes a set of tubes configured for flow of cooling material therethrough, and also includes a set of fins positioned and disposed perpendicular to, and along, the tubes, in such a way that at least a portion of the fins comprises longitudinal excisions therein.
    Type: Application
    Filed: January 12, 2015
    Publication date: May 7, 2015
    Inventor: John S. Chen
  • Patent number: 9004369
    Abstract: A method and system is provided which receives a desired humidity level from a user for the refrigeration compartment of a refrigerator, determines the current humidity level, and then activates an atomizer in the refrigeration compartment to increase the humidity level if needed. The humidity in the refrigeration compartment may be determined based at least in part on the temperature of the refrigeration compartment, the defrost timer, the door opening times, and the compressor timer.
    Type: Grant
    Filed: March 24, 2010
    Date of Patent: April 14, 2015
    Assignee: Whirlpool Corporation
    Inventors: Anderson Bortoletto, Rameet Singh Grewal, Guolian Wu
  • Patent number: 8997504
    Abstract: An improved vent ice prevention apparatus including a first conduit, a second conduit, and a third conduit, wherein the second conduit concentrically surrounds the first conduit thereby forming an annular region between the two conduits. The third conduit is in fluid communication with said annular region. The first conduit is configured to receive a cold vent stream, and the third conduit is configured to receive a dry purge stream and introduce the dry purge stream into the annular region in order to prevent ice formation.
    Type: Grant
    Filed: December 12, 2012
    Date of Patent: April 7, 2015
    Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Bruce M. Ellis, Minh Huy Pham
  • Patent number: 8997509
    Abstract: A heat pump system is configured to have a defrost cycle operable during a heating mode of operation. The system uses: larger than conventionally sized capillary tubes at the liquid refrigerant entry end of an exterior air-source heat exchanger; a special amount of additional refrigerant charge; a supplemental hot gas refrigerant transport line extending from the compressor; a special valve in the new supplemental hot gas refrigerant transport line; and another special valve controlling a restriction to the refrigerant flow in the common consolidated vapor refrigerant transport line exiting the exterior heat exchanger. A controller opens the valve in the new supplemental hot gas refrigerant transport line and to simultaneously engages, for a special period of time, the valve controlling the specially sized restriction to the refrigerant flow in the common consolidated vapor refrigerant transport line exiting the exterior heat exchanger at periodic intervals during potential frost conditions.
    Type: Grant
    Filed: March 10, 2011
    Date of Patent: April 7, 2015
    Inventor: B. Ryland Wiggs
  • Publication number: 20150089966
    Abstract: A method of operating a heat pump system is provided, the heat pump system having at least a controller and configured to operate at least two defrost cycles. The method comprises receiving, at the controller, weather data for a defined geographic area proximate to an installed location of the heat pump system; and selecting, based on said weather data, one of the at least two defrost cycles.
    Type: Application
    Filed: September 27, 2013
    Publication date: April 2, 2015
    Applicant: Lennox Industries Inc.
    Inventors: Yi Qu, Pete Hrejsa
  • Publication number: 20150075192
    Abstract: Temperature sensors detect an outdoor air temperature and a heat exchanger temperature of an outdoor unit, and a human detection sensor detects presence of a person in an air blowable region of each indoor unit. A control section selectively executes a first defrosting operation mode in which a defrosting operation is performed while fans of all the indoor units are stopped, and a second defrosting operation mode in which, when a frost formation amount in the heat exchanger is estimated to exceed a threshold value on the basis of the temperatures detected by the first and second temperature sensors, the indoor unit for which the human detection sensor detects no person in its air blowable region is preferentially selected, and a defrosting operation is performed while the fan of the indoor unit is forcibly operated. Such an air conditioning system and a defrosting operation method reduce time required for defrosting.
    Type: Application
    Filed: April 3, 2013
    Publication date: March 19, 2015
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventor: Shigekazu Wasa
  • Patent number: 8978264
    Abstract: A fuel cell system having an apparatus for gas drying that includes, but is not limited to at least one cooling element with at least one first surface and at least one detachment device. The cooling element is designed to be thermally connected to a heat sink and to come into contact with gas flowing past. The detachment device is movably held relative to the first surface and is designed to detach frozen water from the first surface.
    Type: Grant
    Filed: April 30, 2012
    Date of Patent: March 17, 2015
    Assignee: Airbus Operations GmbH
    Inventors: Ralf-Henning Stolte, Sebastian Mock, Johannes Lauckner
  • Patent number: 8978396
    Abstract: An improved vent ice prevention method including introducing a cold vent stream into a first conduit, wherein at least a portion of the first conduit is concentric with a second conduit, thereby producing an annular region, introducing a hot vent stream into a third conduit, and wherein the third conduit is in fluid connection with the annular region, thereby preventing the first conduit or the second conduit from forming ice. The cold vent stream is a cold compressor seal vent stream. The hot vent stream is a warm compressor seal vent stream.
    Type: Grant
    Filed: June 22, 2012
    Date of Patent: March 17, 2015
    Assignee: L'Air Liquide Societe, Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Bruce M. Ellis, Huy Minh Pham
  • Publication number: 20150047375
    Abstract: In various implementations, a heat pump may include heating operations and defrost operations. The heat pump may monitor cycle time(s) for one or more of the operations. Defrost operation(s) in the heat pump may be automatically adjusted based at least partially on cycle times.
    Type: Application
    Filed: August 13, 2013
    Publication date: February 19, 2015
    Applicant: Lennox Industries Inc.
    Inventors: Yi Qu, Bruce Perkins, Mark Olsen
  • Patent number: 8955761
    Abstract: A system and methods providing real-time monitoring, management and control of a variable frequency drive retrofit to a constant volume air handling unit without making significant mechanical or control system changes. Customers and vendors are provided with a more informative and economically attractive air handling unit. The system also provides a finer granularity of control over conditioned air properties such as temperature, humidity and air quality.
    Type: Grant
    Filed: September 22, 2008
    Date of Patent: February 17, 2015
    Assignee: Rockwell Automation Technologies, Inc.
    Inventor: Ronald M. Malloy
  • Publication number: 20150033773
    Abstract: A refrigerator, where warm air is prevented from flowing into a storage chamber during defrosting or when cooling starts, heat transfer from a cooling chamber to the storage chamber is prevented, and the temperature rise in the storage chamber is constrained to a low level. A separator is used to divide a part of an air supply passage, to form a space portion in communication with a cooling chamber through an air supply opening portion. A first freely controllable opening portion is disposed in a separating area between the space portion and the divided air supply passage, and a second freely controllable opening portion is disposed in a separating area between the space portion and an air return passage or the cooling chamber. By setting the first and second opening portions in closed and open states, respectively, a condenser performs cooling and an air blower supplies air.
    Type: Application
    Filed: March 26, 2013
    Publication date: February 5, 2015
    Inventors: Hiroshi Tajima, Jyunichi Kubota
  • Publication number: 20150027144
    Abstract: An air conditioner, having an outdoor unit and an indoor unit, to perform a heating operation and a defrosting operation, the air conditioner including a detection unit to detect a state of at least one selected between the outdoor unit and the indoor unit and to output the detected value, a controller to determine whether the air conditioner is in a stable state when the defrosting operation is completed and, upon determining that the air conditioner is in the stable state, to control the detected value output from the detection unit to determine entry time of the next defrosting operation, and a storage unit to store a value detected in the stable state. The entry time of the defrosting operation is accurately determined, thereby minimizing the number of times of the defrosting operation during the heating operation.
    Type: Application
    Filed: June 10, 2014
    Publication date: January 29, 2015
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Suk Ho LEE, II Yong CHO, Hyung Mo KOO, Chang Yong LEE, Joon Hwan LEE, Byoung Guk LIM
  • Publication number: 20150013354
    Abstract: The present disclosure, in one embodiment, relates to a defrosting apparatus comprising a manifold, wherein the manifold is adapted to expel a liquid onto an evaporator component. The apparatus further comprising one or more cold liquid pipes adapted to deliver the liquid to a container, the container comprising a mechanism for heating the liquid. And the apparatus also comprising one or more heated liquid pipes adapted to deliver the liquid from the container to the manifold. The present disclosure includes a computer with tactile monitor, machine vision, video cameras for inspecting, reporting and acting to defrost the freezer evaporator(s), and WiFi capabilities. Freezer access and inventory tracking is controlled by a second camera built onto the outward facing tactile monitor. Facial, pattern, and voice recognition is built into this device to provide reliable security and inventory control.
    Type: Application
    Filed: July 15, 2014
    Publication date: January 15, 2015
    Inventors: Luis Carlos Gabino Barrera Ramirez, Joseph Alvite, Dwight Vaughn Friedline
  • Publication number: 20140352335
    Abstract: Adaptive defrost systems, computer program products, and methods are provided. A defrost cycle is initiated, and an actual time of defrost (TOD) is determined based on the defrost cycle. Additionally, a first time between defrost (TBD) between defrost cycles is determined. A variable increment time between defrost (TBDInc) is calculated based at least partially on the ideal time of defrost and the actual time of defrost. The TBD is incremented by TBDInc, resulting in a new TBD, which may be used to initiate the next defrost cycle.
    Type: Application
    Filed: September 11, 2013
    Publication date: December 4, 2014
    Applicant: HAIER AMERICA RESEARCH AND DEVELOPMENT CO., LTD.
    Inventor: Ronald Kenneth ANDERSON
  • Publication number: 20140331698
    Abstract: A condensate collector for an air conditioner window unit. The condensate collector includes a pan including walled sides. Two or more connectors are provided for connecting the condensate collector to the air conditioner window unit. A first one of the connectors is located on one side of the pan and a second one of the connectors is located on an opposite side of the pan from the first one of the connectors. A sponge is removably positioned within the pan, and a drain is provided including an aperture in the pan. A method of collecting condensate from an air conditioner window unit is further provided.
    Type: Application
    Filed: May 5, 2014
    Publication date: November 13, 2014
    Inventor: Everett Kesna Daley
  • Publication number: 20140326005
    Abstract: A galley chiller system configured to operate in a defrost mode is provided including a cooling module, a heating element, and a fan module. The cooling module is configured to provide cool air to at least one galley monument. The cooling module includes a heat exchanger configured to have both air and a liquid coolant flow there through in a heat transfer relationship. The heating element is arranged generally adjacent a coolant inlet of the heat exchanger. The fan module is configured to circulate warm return air from the at least galley monument to the cooling module. When the galley chiller system is in the defrost mode, only liquid coolant flows through the heat exchanger. The liquid coolant is locally heated by the heating element.
    Type: Application
    Filed: May 6, 2013
    Publication date: November 6, 2014
    Applicant: Hamilton Sundstrand Corporation
    Inventors: Thomas M. Zywiak, David Anderson, Jr.
  • Publication number: 20140305145
    Abstract: A control system and a control method for controlling input voltages (1) for household appliances having at least one electric motor in their set of electric charges or devices (5). This control is made by means of a processing unit (3), which can act selectively and independently on a set of output switches (4) and, therefore, act in different ways on each of the devices (5).
    Type: Application
    Filed: September 4, 2012
    Publication date: October 16, 2014
    Applicant: WHIRLPOOL S.A.
    Inventors: Marcelo Zanelato, Marcos Roberto De Souza, Silvia Helena Pini
  • Publication number: 20140283538
    Abstract: A system for controlling the defrost cycle of an evaporator comprising a sensor in the coil of an evaporator or downstream of the coil, the sensor configured to determine changes in the liquid mass ratio of the refrigerant in the evaporator. The difference in liquid mass ratio relating to frost buildup on the outside of said evaporator. When the difference in liquid mass ratio reaches a predetermined amount, corresponding to an unsatisfactory frost buildup, a defrost cycle is initiated. When the liquid mass ratio returns to a value that corresponds to a defrosted evaporator, the defrost cycle is discontinued.
    Type: Application
    Filed: March 21, 2014
    Publication date: September 25, 2014
    Applicant: Evapco, Inc.
    Inventor: Greg Derosier
  • Publication number: 20140260360
    Abstract: A refrigerated merchandiser includes a sensor coupled to a case adjacent an air inlet. The sensor is in communication with a portion of a refrigerated airflow passing through the air inlet to sense a temperature of the airflow and to generate a signal indicative of an air return temperature. The merchandiser also includes a controller in communication with the sensor to receive the signal indicative of the air return temperature, the controller further in communication with a conductive film on a door and programmed to initiate a clearing interval to clear condensation from the door in response to the signal indicative of the air return temperature reaching a first predetermined temperature threshold.
    Type: Application
    Filed: March 12, 2013
    Publication date: September 18, 2014
    Applicant: HUSSMANN CORPORATION
    Inventor: John M. Rasch
  • Publication number: 20140260361
    Abstract: An energy management system may include a refrigeration apparatus. Heat rejected from that apparatus may be used for heating elsewhere. There may be cooling loads which may be prone to frosting. A defrosting apparatus is provided. It is segregated from the coolant distribution array. Recaptured heat of the refrigeration apparatus may be used to defrost the cooling load heat exchangers, in an alternating or cycling mode, as may be. The apparatus may be electronically controlled. Ammonia may be used in a primary refrigeration vapour cycle system. The apparatus may also use a secondary cooling loop or system, linked to the primary system. The secondary system may be a distribution system. The secondary system may use CO2 as a heat transport medium. The coolant system may be an high pressure system, whereas the defrost system is a low pressure system. Separate circuits are provided for coolant and defrost.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Inventor: Benoit RODIER
  • Publication number: 20140260362
    Abstract: The present invention relates to a heat exchanger, a method for manufacturing the same, a heat recovery ventilator (HRV) including the same, and a method for defrosting and checking operations thereof.
    Type: Application
    Filed: March 12, 2014
    Publication date: September 18, 2014
    Inventor: In Sook JUNG
  • Publication number: 20140245759
    Abstract: The present invention relates to a defrosting apparatus comprising a vessel which is partially filled with the product to be defrosted and which rotates and/or comprises means to move the product during defrosting.
    Type: Application
    Filed: September 7, 2012
    Publication date: September 4, 2014
    Inventor: Bjarne Lyngoe
  • Publication number: 20140216705
    Abstract: An automatic climate controller device may be configured to perform operations including identifying, by an automatic climate controller device, an operating zone of the climate control system according to at least two input factors; identifying a discharge temperature of the climate control system; determining, based on the operating zone and the discharge temperature, whether to perform at least one override action to override a climate control system setting to reduce the possibility of evaporator core icing; and adjusting an evaporator set point according to the at least one override action to reduce the discharge temperature. The input factors may include evaporator temperature and cabin relative humidity. The actions may include to increase blower speed and to increase use of recirculated air.
    Type: Application
    Filed: February 5, 2013
    Publication date: August 7, 2014
    Applicant: FORD GLOBAL TECHNOLOGIES, LLC
    Inventors: Gary A. Dage, Steven L. Lambert
  • Publication number: 20140216078
    Abstract: Embodiments are directed to determining, by a controller comprising a processor, that a coil associated with a heat pump is subjected to a defrost cycle, determining, by the controller, that at least one of: a conditioned space is occupied, and a thermostat associated with the conditioned space indicates that an energy saving mode is not in use, and enabling, by the controller, an auxiliary heat source based on the determination that the coil is subject to the defrost cycle and the determination that the conditioned space is occupied or the thermostat indicates that the energy saving mode is not in use.
    Type: Application
    Filed: December 2, 2013
    Publication date: August 7, 2014
    Applicant: Carrier Corporation
    Inventor: Mark J. Ladd
  • Patent number: 8769976
    Abstract: A method for controlling a refrigerant distribution in a vapour compression system, such as a refrigeration system, e.g. an air condition system, comprising at least two evaporators. The refrigerant distribution determines the distribution of the available amount of refrigerant among the evaporators. While monitoring a superheat, SH, at a common outlet for the evaporators, the distribution of refrigerant is modified in such a manner that a mass flow of refrigerant to a first evaporator is altered in a controlled manner. The impact on the monitored SH is then observed, and this is used for deriving information relating to the behaviour of the first evaporator, in the form of a control parameter. This is repeated for each evaporator, and the refrigerant distribution is adjusted on the basis of the control parameters. The impact may be in the form of a significant change in SH.
    Type: Grant
    Filed: June 11, 2008
    Date of Patent: July 8, 2014
    Assignee: Danfoss A/S
    Inventors: Claus Thybo, Rafael Wisniewski
  • Publication number: 20140165630
    Abstract: The invention relates to a method for controlling a refrigeration system by establishing a defrost period during an initial defrost period. One or more compressors of the refrigeration system are monitored to establish if the one or more compressors are running, and a parameter representative of the one or more compressors running is monitored. The monitoring establishes at least one parameter limit value representative of whether a defrost period or a non-defrost period is to be initiated. The invention also relates to a method for controlling a refrigeration system subsequent to an electrical power interruption. The invention also relates to control units for applying one or both of the methods according to the invention, and to a refrigeration system having one or more control units controlling the refrigeration system according to one or both of the methods.
    Type: Application
    Filed: July 13, 2012
    Publication date: June 19, 2014
    Applicant: DANFOSS A/S
    Inventors: Gero C. Langenberg, Hans Erik Fogh
  • Publication number: 20140165628
    Abstract: An order in which parts of a heat source side heat exchanger are defrosted is determined on the basis of the heat exchanger capacity of the parts of the heat source side heat exchanger, the necessary heating capacity of the parts of the heat source side heat exchanger, and the arrangement of the parts of the heat source side heat exchanger, the opening and closing of first flow switching valves, second flow switching valves, and third flow switching valves are controlled accordingly, and a defrosting operation in which a refrigerant discharged from a compressor is caused to flow through the heat source side heat exchanger is performed.
    Type: Application
    Filed: March 28, 2013
    Publication date: June 19, 2014
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Naomichi TAMURA, Tadashi ARIYAMA
  • Publication number: 20140165629
    Abstract: A method for controlling evaporator defrost in a refrigeration appliance having a cooling circuit with a variable cooling capacity compressor is disclosed. The method includes assessing the cooling capacity of the cooling circuit and calculating the defrost time on the basis of such cooling capacity. Defrost time is preferably assessed on the basis of the inverter frequency driving the compressor and/or the percentage of insertion of the compressor.
    Type: Application
    Filed: December 12, 2013
    Publication date: June 19, 2014
    Applicant: WHIRLPOOL CORPORATION
    Inventors: MARIAGRAZIA DAURIA, DAVIDE GUATTA, RAFFAELE PAGANINI, FRANCESCO DEL BELLO, PAOLO SICHER
  • Publication number: 20140157800
    Abstract: A refrigerator including an evaporator to carry out heat exchange, a frost sensing unit to sense an amount of frost formed on the frost sensing unit, and a heater to be operated for removing the frost from the frost sensing unit is provided. The heater is operated in at least a portion of a defrosting section. Methods for operating the refrigerator are also provided.
    Type: Application
    Filed: December 10, 2013
    Publication date: June 12, 2014
    Inventors: Seojung Kim, Yonghwan Eom, Kyeongyun Kim
  • Publication number: 20140150479
    Abstract: Frost may accumulate on a heat pump. In various implementations, a primary defrost operation and/or a secondary defrost operation may be utilized to remove at least a portion of the frost from the heat pump.
    Type: Application
    Filed: November 30, 2012
    Publication date: June 5, 2014
    Inventors: Yi Qu, Bruce Perkins, Chris Mchugh, Mark Olsen
  • Publication number: 20140150477
    Abstract: In various implementations, frost in a vapor compression system may be controlled. A property of a fan may be determined. A determination may be made whether a frost event and/or a nonfrost event has occurred based at least partially on the determined fan property.
    Type: Application
    Filed: November 30, 2012
    Publication date: June 5, 2014
    Inventors: Yi Qu, H. Gene Havard, Jon Douglas, Jeff Mangum
  • Publication number: 20140150478
    Abstract: In various implementations, an ice sensor may include heater(s), ice accumulation surface(s), and/or temperature sensor(s). During operation, heat from a heater may be provided to an ice accumulation surface and a temperature sensor(s) may determine temperature(s) of the ice accumulation surface. A determination of whether ice is present on the ice sensor may be based at least partially on the determined temperature(s).
    Type: Application
    Filed: November 30, 2012
    Publication date: June 5, 2014
    Inventors: Robert B. Dutch Uselton, Jonathan Douglas
  • Patent number: 8739563
    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: Grant
    Filed: April 21, 2011
    Date of Patent: June 3, 2014
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Kodjovi Coussey, Richard Rusich, Tejendra Patel, Anson Stark Coolidge
  • Publication number: 20140137580
    Abstract: A method of refrigeration control through a refrigeration system of a refrigerated transport container includes performing a defrost cycle on the refrigeration system by activating a heat source; and restarting the refrigeration system after the defrost cycle has completed, wherein restarting the refrigeration system includes performing a liquid slugging avoidance process including: initiating a compressor of the refrigeration system at a speed; opening a pressure equalization valve in parallel with the compressor in response to the initiating; opening a liquid valve in series between a condenser and an evaporator after opening of the pressure equalization valve; and closing the pressure equalization valve after a period of time.
    Type: Application
    Filed: July 7, 2011
    Publication date: May 22, 2014
    Applicant: Carrier Corporation
    Inventors: Fabienne Peyaud, JeanPhilippe Goux, Virginie Choquart
  • Publication number: 20140123690
    Abstract: A method for operating a refrigerator appliance during a defrost cycle of the refrigerator appliance is provided. The method includes deactivating a compressor of the refrigerator appliance at a beginning or commencement of the defrost cycle until a predetermined period of time elapses or a chilled chamber of the refrigerator appliance rises to a preselected temperature. The method can improve an energy efficiency of the refrigerator appliance.
    Type: Application
    Filed: November 7, 2012
    Publication date: May 8, 2014
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Kenneth Joseph Hanley, Martin Christopher Severance
  • Patent number: 8707716
    Abstract: A method of defrosting a heat exchanger while the heat exchanger continues to cool air passing through the heat exchanger. The heat exchanger includes liquid passages for carrying cold liquid between an inlet and an outlet and air passages in thermal communication with the liquid passages for cooling air passing through the air passages. The method includes introducing warmer liquid to a first selected section of the heat exchanger liquid passage while continuing to provide cold liquid to the liquid passages of the heat exchanger.
    Type: Grant
    Filed: December 14, 2011
    Date of Patent: April 29, 2014
    Assignee: The Boeing Company
    Inventor: Steve G. Mackin