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7454919 |
Hot-water supply apparatus
Defrosting operation is possible by causing refrigerant discharged from a compressor to flow to an outdoor heat exchanger, and returning the refrigerant passed through the outdoor heat exchanger to...
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7348522 |
Apparatus for thawing frozen food items
An apparatus is disclosed for thawing a frozen food item, including a chamber dimensioned to receive the frozen food item, a heat exchanger operable to either heat air in the chamber or to cool the...
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7228692 |
Defrost mode for HVAC heat pump systems
A heat pump, and in particular a heat pump for heating a hot water supply is provided with an improved defrost mode. The defrost mode is actuated to remove frost from an outdoor evaporator that may...
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7219505 |
Control stability system for moist air dehumidification units and method of operation
A system and humidity control method is provided for a multi-stage cooling system having two or more refrigerant circuits that balances humidity control and cooling demand. Each refrigerant circuit...
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7185502 |
Multi-type air conditioner and method for controlling operation of the same
Air conditioner, and method for controlling an operation of the same, the air conditioner including a sheath heater in the accumulator for heating the refrigerant in room heating for delaying...
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7171817 |
Heat exchanger liquid refrigerant defrost system
A heat exchanger liquid refrigerant defrost system disclosed herein specifically designed to defrost the coil subsystems used on an outdoor heat exchanger used on a building heat pump unit or...
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7150158 |
Freezing prevention system for refrigeration device and air conditioner using the same
A freezing prevention system for a refrigeration device includes a freezing-prevention temperature sensor for detecting a refrigerant temperature in a refrigerant evaporator, and a control unit for...
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7137262 |
Supplemental heat control apparatus and method for freezer/refrigeration equipment
A method and apparatus that provides supplemental heat from a heat source based upon the operating environment of a refrigeration or freezer. The supplemental heat is automatically controlled to...
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7131284 |
Automatic defrost controller including air damper control
A damper apparatus for controlling airflow between compartments in a two compartment refrigerator having a door includes a controller for controlling opening and closing of a damper; and a door...
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7089752 |
Refrigerator and defrosting method thereof
A refrigerator and a defrosting method thereof which are capable of achieving an appropriate defrosting operation even when a part of constituent elements included in a defrosting system fails. The...
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7028494 |
Defrosting methodology for heat pump water heating system
Refrigerant is circulated through a vapor compression system including a compressor, a gas cooler, an expansion device, and an evaporator. When a sensor detects that frozen water droplets form on...
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6978629 |
Vehicle air conditioner
In a vehicle air conditioner, a controller calculates a first target post-evaporator temperature for defogging a windshield based on a detection humidity of a humidity sensor, and calculates a...
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6927750 |
External display device of refrigerator and method for controlling the same
An external display device of a refrigerator which includes a microprocessor enabling a serial data transmission/reception between the external display device and a control unit included in the...
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6883334 |
Cold plate temperature control method and apparatus
A method and apparatus for controlling the temperature of a cold plate is disclosed. The temperature of the cold plate is controlled by directing compressed refrigerant along a first path...
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6843065 |
Very low temperature refrigeration system with controlled cool down and warm up rates and long term heating capabilities
Heating/defrost constructions of a very low temperature refrigeration system having a defrost supply circuit and a defrost return bypass circuit optimizing the heating/defrost cycle, preventing...
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6840053 |
Temperature control using infrared sensing
A system and method for sensing and controlling the temperature of a heating, ventilation and air conditioning (HVAC) system utilizes an infrared sensor. The infrared sensor is used to detect...
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6837060 |
Adaptive defrost control device and method
A method for defrosting a household refrigeration appliance including a compressor and a defrost heater. After a controller indicates that it is time for a defrost cycle, the compressor is operated...
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6802369 |
Refrigerator quick chill and thaw control methods and apparatus
A control system for a refrigerator quick chill and thaw system comprises an electronic controller coupled to the operable components of a modular air handler for producing a convective airstream...
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6779352 |
Refrigerator and method of controlling the same
A refrigerator which uses a microcomputer having a common input port for a plurality of temperature sensing devices, and a method of controlling the same. In the refrigerator, inexpensive bimetals...
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6745583 |
Defrosting apparatus of air conditioner and method thereof
Disclosed are a defrosting apparatus of an air conditioner and a method thereof. The defrosting apparatus includes a temperature sensor for sensing a pipe temperature of an outdoor heat exchanger...
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6725679 |
Vehicle air conditioner with defrosting operation of exterior heat exchanger
In a vehicle air conditioner with a heat pump cycle having an interior heat exchanger and an exterior heat exchanger, when a frosting on a surface of the exterior heat exchanger is determined and...
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6725678 |
Refrigerator with multipurpose storage chamber and control method thereof
A refrigerator with a multipurpose storage chamber and a control method. In the refrigerator, the flow of cool air to the multipurpose storage chamber is selectively controlled in accordance with a...
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6718778 |
Defrost control method and apparatus
A defrost control system detects the variation in flow rate of refrigerant through an evaporator 8 while the flow is regulated to achieve a desired level of superheat at the outlet of the...
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6701729 |
Device and method for operating a refrigeration cycle without evaporator icing
The present invention relates to a device and method for operating a refrigeration cycle without icing of the evaporative surface of the device.
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6694754 |
Refrigeration appliance with pulsed defrost heater
A refrigeration appliance is provided having a first compartment to be cooled, at least one evaporator in heat transfer association with the first compartment, a defrost heater associated with the...
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6694753 |
Defrost delay module
A device and method for automatically defrosting a refrigeration system only during times of non-peak energy demand. The device is a defrost delay module that plugs into the current defrost timer...
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6672086 |
Frosting cooler
A frosting cooler creates and maintains frost on cold products, such as bottles of a beverage stored in the cooler, thereby to provide a visual manifestation of the cold condition of the beverage....
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6668917 |
Energy saving defog/device operation strategy and control scheme for vehicles
An energy-saving method for operating a climate control system includes reporting an ambient outside temperature from a first temperature sensor to a controller unit and reporting a climate control...
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6668566 |
System and a method of automatic defrost for a refrigeration appliance
A system and a method of automatic defrost for a refrigeration appliance, including a hermetic compressor driven by an electric motor ( 1 ); a control unit ( 2 ); a thermal switch means ( 10 )...
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6640566 |
Device and method for automatic defroster in cars
Method and apparatus for providing an automatic defroster function for a surface in a vehicle including a sensor for detecting the presence of mist or ice on such a surface, means for generating...
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6634180 |
System and method for defrost termination feedback
A heat pump system includes an indoor unit and an outdoor unit, with a compressor, an outdoor fan, and a reversing valve all in the outdoor unit. A thermostat is added to the outdoor unit with one...
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6631620 |
Adaptive refrigerator defrost method and apparatus
A method and apparatus for defrosting an evaporator of a refrigeration system including a defrost heater and a controller operatively connected to the evaporator and a defrost heater is provided....
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6629422 |
Sequential defrosting of refrigerated display cases
The invention is a method and a defroster control circuit to sequentially defrost a series of refrigerated display cases. The method begins by operating the series of refrigerated display cases...
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6619058 |
Refrigerator for kimchi and controlling method therefor
Disclosed is a refrigerator for kimchi, including a main body having at least one cooling chamber, an evaporator for cooling the cooling chamber, a compressor for supplying a refrigerant to the...
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6606870 |
Deterministic refrigerator defrost method and apparatus
A defrost control system for a self-defrosting refrigerator is configured to monitor a compressor load, determine whether at least a first defrost cycle is required based on the compressor load,...
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6604577 |
Geothermal heat pump cleaning control system and method
An apparatus for removing deposits from a heat transfer wall of a heat exchanger. The apparatus includes a cleaning cycle control system that operates through the control system of the heat pump...
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6601396 |
Freezer defrost method and apparatus
Methods and apparatus for freezer defrost, which are particularly suited for an automated system, include the formulation of algorithms utilized for this purpose. The algorithms are included in the...
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6490876 |
Method and apparatus for de-icing dehumidifier
A method and apparatus for operating a dehumidifier in a de-ice mode is provided wherein the dehumidifier has an evaporator coil, a fan operated by a fan motor to cause a flow of ambient air over...
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6467284 |
Frostless heat pump having thermal expansion valves
A heat pump system having an operable relationship for transferring heat between an exterior atmosphere and an interior atmosphere via a fluid refrigerant and further having a compressor, an...
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6449967 |
High speed evaporator defrost system
A high-speed evaporator defrost system is described. It comprises a defrost conduit circuit having valves for directing hot high pressure refrigerant gas from a discharge line of a compressor and...
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6430948 |
Automatic vending machine capable of carrying out a defrosting operation adapted to a frosting condition
In an automatic vending machine in which a number of items are stored in a commodity storage and cooled by a cooling unit included in a refrigerating circuit, a temperature sensor detects a storage...
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6418737 |
Heat pump type hot-water supply system capable of performing defrosting operation
A heat pump type hot-water supply system performs an ordinary operation for heating liquid stored in a reservoir by circulating the liquid in a heat exchanger for supplying hot water. When an...
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6415616 |
Method for controlling defrost heater of refrigerator
The present invention relates to a method for controlling a defrost heater of a refrigerator. The method for controlling a defrost heater of a refrigerator, comprising the steps of; accumulating...
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6397610 |
Method for controlling air conditioner/heater by coil temperature
An air conditioner/heater automatically operates in either air conditioning or heating mode by coil temperatures of indoor and outdoor heat exchangers. In air conditioning mode, the rotating speed...
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6334321 |
Method and system for defrost control on reversible heat pumps
A control algorithm controls a coil defrosting cycle on a reversible heat pump by storing values representing performance of a clean coil, i.e., one with no frost build-up, and monitoring those...
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6330803 |
Operation control apparatus for a refrigerator
An operation control apparatus for a refrigerator performs a cooling operation by using a refrigerating compartment temperature regulator directly connected to a power-supply input terminal even if...
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6321543 |
Method for protecting compressors used in chillers and/or heat pumps
A controller monitors the saturated suction temperature and the saturated discharge temperature of a system that includes a compressor operating as part of a chiller and/or heat pump. When the...
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6318095 |
Method and system for demand defrost control on reversible heat pumps
A control processor controls an outdoor coil defrost cycle on a reversible heat pump by continuously monitoring the difference between the outdoor coil temperature and the outdoor air temperature....
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6250090 |
Apparatus and method for evaporator defrosting
An apparatus and method for warm-liquid defrosting of the evaporator of a refrigeration system. The apparatus includes a first refrigerant expansion device that selectively expands refrigerant for...
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6205800 |
Microprocessor controlled demand defrost for a cooled enclosure
A refrigerated device having a cooled enclosure and an evaporator through which refrigerant is circulated. An air temperature sensor adapted to generate an air temperature signal indicative of air...
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