Abstract: An energy saving defrost control system for an electromechanically controlled refrigerator. The system includes a defrost timer adapted 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 demand side management module responsive to demand state signals from an associated utility indicative of at least a peak demand and an off peak demand state, and a time delay latching relay having a timer and configured to switch to one of a low position and a high position based on the demand state signal.

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.

Abstract: An outdoor unit control unit 200 has a defrosting operation condition table 300a that defines an activation rotational speed Cr in accordance with a total sum of flow rate coefficients Cva that is a total sum of flow rate coefficients Cv representing capacities of indoor expansion valves 52a to 52c. The outdoor unit control unit 200 calculates the total sum of the flow rate coefficients Cva by adding the flow rate coefficient Cv of each of the indoor expansion valves 52a to 52c, and refers to the defrosting operation condition table 300a, so as to determine the activation rotational speed Cr. Then, the outdoor unit control unit 200 activates a compressor 21 at the determined activation rotational speed Cr when starting a defrosting operation, maintains this activation rotational speed Cr for a predetermined time from the start of the defrosting operation, and drives the compressor 21.

Abstract: A method of controlling a heating, ventilation and air-conditioning (HVAC) system includes measuring an ambient temperature and determining whether the ambient temperature is below a threshold temperature value. Responsive to a determination that the ambient temperature is below the threshold temperature value, measuring a condenser-fan cycle time of the HVAC system and setting a speed of the compressor based on the measured condenser-fan cycle time.

Abstract: A heat pump device includes an air conditioning control device configured to switch the heat pump device among a plurality of operation modes including an air-heating operation mode in which an indoor heat exchanger serves as a radiator and an outdoor heat exchanger serves as a heat absorber, and an air-cooling operation mode in which the indoor heat exchanger serves as a heat absorber and the outdoor heat exchanger serves as a radiator. The air conditioning control device switch a refrigerant pipe such that refrigerant is, in the air-cooling operation mode, supplied to part of the outdoor heat exchanger serving as a refrigerant inlet in the air-heating operation mode.

Abstract: The invention relates to a method for controlling a refrigerator. The method comprises the steps of establishing a time interval of a certain duration, a first use of the refrigerator starting a first time interval, starting a subsequent time interval based on the start of the first time interval, and subtracted a time difference. The subsequent time interval subtracted a time difference is being used for starting a cool-down period of the subsequent time interval. The invention also relates to a control unit for the refrigerator and to a refrigerator with such control unit.

Abstract: A refrigerator includes an ice making chamber having an ice making tray, an ice making chamber refrigerant pipe to supply cool air to the ice making tray, and an ice making chamber circulation fan to circulate air in the ice making chamber. A control method to prevent frost from being formed in the ice making chamber includes determining whether temperature of the ice making chamber is lower than a predetermined temperature; and driving the ice making chamber circulation fan to prevent frost from being formed in the ice making chamber upon determining that the temperature of the ice making chamber is lower than the predetermined temperature. Driving the ice making chamber circulation fan to prevent frost includes driving the ice making chamber circulation fan for a predetermined period of time when the temperature of the ice making chamber is lower than the predetermined temperature.

Abstract: The invention relates to a method for controlling a refrigerator. The method comprises the steps of establishing a time interval of a certain duration, a first use of the refrigerator starting a first time interval, starting a subsequent time interval based on the start of the first time interval, and subtracted a time difference. The subsequent time interval subtracted a time difference is being used for starting a cool-down period of the subsequent time interval. The invention also relates to a control unit for the refrigerator and to a refrigerator with such control unit.

Abstract: The present disclosure discloses a liquid cooler having separable and portable components. The liquid cooler has a liquid cooling section and a refrigerating system section. In an operative liquid cooling configuration, the components present in the liquid cooling section and the refrigerating system section are connected with each other with a first and second releasing coupler. In an operative defrosting configuration, the components of present in the liquid cooling section and the refrigerating system section are separated with each other by releasing the first and second releasing coupler and hence are easily portable. The separated liquid cooling section and the refrigerating system section enables easy periodic maintenance or replacement of faulty components in less time, labor and cost. Further, the liquid cooler is powered by power received from power mains or by power storage device such as battery.

Abstract: A refrigerator is provided that includes a low energy defrost system and method for melting frost formed on an evaporator of a cooling system for the refrigerator. The low energy defrost system includes using air from the refrigerator compartment or external air adjacent the refrigerator to be directed to the evaporator and passed adjacent the evaporator coils to melt any frost formed thereon. As the air is above freezing temperature, it will melt any frost formed on the coils without the need of use an electrical heater. Re-cooled air from the melted frost may then be directed back into the refrigerator compartment to be used to aid in cooling the refrigerator compartment or keeping the refrigerator compartment at the programmed or predetermined temperature.

Abstract: A tamping unit of a machine for simultaneously tamping at least two sleepers of a track, positioned one following the other with regard to a longitudinal direction of the machine, includes inner tamping tines provided for simultaneous immersion into the same sleeper crib and, arranged at either end, a respective outer tamping tine. Each tamping lever mounted on an assembly frame for pivoting about a pivot axis is connected to a squeeze drive. Each squeeze drive is mounted on a common eccentric shaft having an eccentricity with respect to an axis of rotation. The eccentricity causing vibrations of the inner tamping tine is configured differently as compared to the eccentricity causing vibrations of the outer tamping tine.

Abstract: A vehicle air conditioner is capable of selecting and changing an optimum operation mode so that a desirable air conditioning performance can be exerted on conditions such as an environment and a set temperature. A controller changes and executes at least one of a heating mode, a dehumidifying and heating mode, a dehumidifying and cooling mode, and a cooling mode. In the dehumidifying and heating mode, the controller shifts to the dehumidifying and cooling mode on the basis of a situation where heat absorption in a heat absorber (9) runs short or heat radiation in a radiator (4) becomes excessive, and also in this dehumidifying and cooling mode, the controller shifts to the dehumidifying and heating mode on the basis of a situation where the heat radiation in the radiator (4) runs short.

Abstract: An air conditioner includes an indoor unit, an outdoor unit including an outdoor fan, a sensor unit mounted at an upper portion of the outdoor unit to sense snow piled up on the outdoor unit, and a control unit to determine whether snow is piled up or not based on an output from the sensor unit and control an operation of the outdoor fan to remove snow when snow is piled up based on the determination. The sensor unit includes a photo sensor and a temperature sensor.

Abstract: A cooling box to control temperature so that an internal temperature of the cooling box becomes equal to a set temperature, includes: a control device including an temperature sensor to detect an ambient temperature of the box, and adjust a supply amount of warm air into the box after stopping supply of cold air thereinto based on the ambient temperature; and a door sensor to detect whether an opening connected with the interior of the cooling box is in either an open or closed state, when the door sensor detects a change of the opening from an open to closed state. The control device executes control so that the warm-air-supply-amount reaches a first value until a predetermined period has elapsed, and executes control so that the warm-air-supply-amount reaches a second value smaller than the first value after the predetermined period has elapsed.

Abstract: A refrigerator and a method for controlling a refrigerator are provided. The refrigerator may include a pair of evaporators. When a switching valve operates, one blower fan may be maintained in operation for a predetermined period of time to more quickly collect a refrigerant, thereby realizing an efficient cycle operation.

Abstract: A defrost system includes: a cooling device in a freezer, and includes a casing, a heat exchanger pipe with a difference in elevation in the casing, and a drain receiver unit below the heat exchanger pipe; a refrigerating device to cool and liquefy CO2 refrigerant; and a refrigerant circuit for permitting the cooled and liquefied CO2 refrigerant to circulate to the heat exchanger pipe. The defrost system includes a bypass pipe of the heat exchanger pipe to form a CO2 circulation path; an on-off valve in the heat exchanger pipe to be closed during defrosting so that the CO2 circulation path is a closed circuit; a pressure adjusting unit for adjusting pressure of the CO2 refrigerant during defrosting; and a brine circuit as a first heating medium, in which the defrost system permits the CO2 refrigerant to naturally circulate in the closed circuit during defrosting by a thermosiphon effect.

Abstract: A relay module includes a case forming an exterior of the relay module, a Positive Temperature Coefficient (PTC) device configured to control the supply of power to the compressor, a holder mounted at the case and configured to accommodate the PTC device, a start capacitor electrically connected to the PTC device, a first connecting terminal having a first PTC connecting terminal connected to the PTC device and a first capacitor connecting terminal connected to the start capacitor, and a second connecting terminal having a second PTC connecting terminal connected to the PTC device and a second capacitor connecting terminal connected to the start capacitor. The first capacitor connecting terminal and the second capacitor connecting terminal are spaced apart a predetermined distance from a bottom surface of the case.

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.

Abstract: An air conditioner includes a compressor and a heat exchanger. The heat exchanger includes a first header pipe to have a refrigerant compressed by the compressor to flow therein, a heat exchange unit including a plurality of first refrigeration tubes and a plurality of second refrigeration tubes to thermally exchange the refrigerant with air, a plurality of first header branch pipes coupling the first header pipe with corresponding first refrigeration tubes in the heat exchange unit, a bypass pipe to have the refrigerant, thermally exchanged in the heat exchange unit, passing therethrough in the air cooling operation, and a second header pipe to have the refrigerant passing through the bypass pipe to flow therein. A plurality of second header branch pipes couples the second header pipe with corresponding second refrigeration tubes in the heat exchange unit, where at least two first refrigeration tubes have at least one second refrigeration tube therebetween.

Abstract: A moisture control system includes a cabinet having a mullion defining first and second compartments and openings within the mullion to provide selective communication between the compartments. An evaporator is disposed in the first compartment. A cooling bank is disposed in the second compartment in selective thermal communication with the evaporator, and includes cooling and condensing portions separated by a dividing member, and a fluid collector disposed proximate the condensing portion. A first cooling fan is disposed proximate the evaporator and configured to direct air across the evaporator and through the first compartment. A second cooling fan is disposed proximate the cooling bank and operable between an evaporator position in fluid communication with the evaporator and the cooling bank, and a bank position in fluid communication with the cooling bank. A panel assembly is disposed proximate the plurality of openings and operable between a plurality of positions.

Abstract: A refrigeration cycle that is formed by connecting a compressor, a condenser, an expansion valve, and an evaporator and that performs cooling operation; an evaporator heating device that heats the evaporator; a drain pan that receives drain-water from the evaporator and drains the drain-water; a drain-pan heating device that heats the drain pan; a frost detecting device including a light-emitting element that emits light to the evaporator and a light-receiving element that receives reflected light from the evaporator and outputs a voltage according to the reflected light; and a control device that controls on-off operation of the evaporator heating device and the drain-pan heating device. The control device determines a frosting condition on the evaporator from an output of the frost detecting device and individually controls the evaporator heating device and the drain-pan heating device in accordance with the determination result.

Abstract: A system for controlling a defrost cycle of an evaporator having a sensor module and a control module. The sensor module includes a light source configured to emit light toward the evaporator when activated and to deactivate in response to a lockout signal. The sensor module also includes a light sensor configured to determine an amount of the emitted light reflected by the evaporator and to generate a detected light signal that corresponds to the amount of the emitted light reflected by the evaporator. The control module is configured to receive the detected light signal from the light sensor and to compare the detected light signal to a preset threshold. The control module is also configured to generate a termination signal when the detected light signal is less than the preset threshold and to generate the lockout signal when the detected light signal is greater than the preset threshold.

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.

Abstract: A refrigerator (1) includes a cabinet (2) provided with a primary electrical circuit (7) connected to a main alternate voltage power supply and at least one movable member (6) associable to the cabinet (2) and provided with a secondary electrical circuit (11). The secondary circuit (11) is powered contactlessly by the primary circuit (7) and the secondary circuit (11) supplies electrical energy to a power consuming device (14).

Abstract: The present invention relates generally to a method for automatically adjusting the interval of time between defrost cycles in a heat pump system. The method includes tracking the duration of the previous defrost cycle or cycles, and dynamically adjusting the length of time before initiating the next defrost cycle.

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.

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.

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.

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.

Abstract: A system and method of heat exchanger freeze protection for an HVAC system by operating an indoor unit assembly and an outdoor unit assembly in a cooling mode and operating a fan at an initial airflow, operating a temperature sensor to measure a temperature value of a heat exchanger, at the expiration of a first predetermined time period, determining whether the temperature value is less than or equal to a first temperature preset value, determining whether a current airflow multiplier is equal to a maximum airflow multiplier limit, increasing the current airflow by an airflow offset multiplier if the current airflow multiplier is less than or equal to the maximum airflow multiplier limit and the temperature value is less than or equal to the first temperature preset, and operating the fan at an increased airflow to move more air across the heat exchanger.

Abstract: An air conditioner for a vehicle includes a vapor compression refrigeration cycle switchable between a heat pump cycle and a cooler cycle, a heat core configured to heat air to be blown into a vehicle compartment by using coolant of an engine of the vehicle as a heat source, and a controller configured to control operation of the vapor compression refrigeration cycle. The controller controls the vapor compression refrigeration cycle to be operated as the cooler cycle so as to perform a defrosting control of the outdoor heat exchanger, and outputs an operation request signal to the engine, when the controller determines that the outdoor heat exchanger is frosted.

Abstract: A refrigerating machine having tube-cooled evaporator & air-cooled evaporator includes a refrigerating device (1) and a defroster (4). The refrigerating device (1) includes a compressor (11), a condenser (12), a reservoir (13), a heat exchanger (14), a first refrigerating electromagnetic valve (15a), a first expansion valve (16a), a tube-cooled evaporator (2), a second refrigerating electromagnetic valve (15b), a second expansion valve (16b), an air-cooled evaporator (3), and a plurality of pipes (10a, 10b, 10c, 10d, 10g). The defroster (4) includes a micro switch (41), a door-opening relay, a high/low pressure switch (43), a compressor electromagnetic switch, a delay relay (45), a set timer (46), a defrosting timer (47), a defrosting conversion contactor, and a defrosting resetting temperature switch (40).

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.

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.

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.

Abstract: A refrigerating and air-conditioning apparatus performs, even during a heating operation under air conditions leading to formation of frost, a defrosting operation while simultaneously continuing a heating operation and that improves comfort through heating by ensuring an appropriate amount of ventilation. A plurality of refrigeration cycles that are capable of independently performing a heating operation and a defrosting operation, are provided. A ventilation damper of an indoor unit in which a refrigeration cycle that performs a defrosting operation is installed is closed during a defrosting operation, and a ventilation damper of an indoor unit in which a refrigeration cycle that performs a heating operation is installed is controlled to achieve a required amount of ventilation corresponding to the indoor ventilation state.

Abstract: Appliances are provided with one or more heated glass panels that provide a uniform and controllable source of heat. The heated glass panels can generate heat for any desired purpose, such as drying articles and removing frost buildup in a freezer.

Abstract: A method of analyzing and controlling a refrigeration system (1) including at least one compressor (4), at least one condenser (5) and at least two refrigeration entities (2), each having at least one evaporator (9), includes preventing or reducing evaporator synchronization. Based on information received from the evaporator valve control units by a central control unit (9), it is determined whether or not two or more evaporators (9) are running in a synchronized manner and the refrigeration system (1) is controlled in order to desynchronize the evaporators (9) when two or more evaporators (9) are running in a synchronized manner.

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.

Abstract: A system and a method are provided for returning oil in a heating, ventilation, and air conditioning (HVAC) system by determining when an ambient zone temperature is equal to or less than a temperature limit and reversing a direction of refrigerant flow of the HVAC system based on the length of time. Also, a system and a method are provided for monitoring the length of operation in a first and a second heating mode and for reversing a direction of refrigerant flow based on the length of time operation occurs in the first and second heating modes. A system and a method having a first compressor, a first heating mode, a second heating mode, a defrost mode, and a controller is disclosed. The controller selectively controls initiation of the defrost mode in response to an HVAC system operating in a heating mode of operation for a predetermined amount of time.

Abstract: Heat pumps with improved defrost cycles and methods of defrosting heat exchangers, for example, having microchannel outdoor heat exchangers. A heat exchanger has three types of connection points that are used during a defrost cycle. Two connection points are used to deliver hot refrigerant gas to the heat exchanger and one connection point is where refrigerant exits the heat exchanger. Two of the connection points are at the same header and during at least part of the defrost cycle, at least part of the hot refrigerant gas is passed through that header without passing through any cross tubes of the heat exchanger. A defrost valve in a refrigerant conduit opens during the defrost cycle to deliver hot refrigerant gas to the connection point on the header. In a number of embodiments, the defrost valve is open only during a portion of the defrost cycle.

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.

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.

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.

Abstract: Heat pumps with improved defrost cycles and methods of defrosting heat exchangers, for example, having microchannel outdoor heat exchangers. A heat exchanger has three types of connection points that are used during a defrost cycle. Two connection points are used to deliver hot refrigerant gas to the heat exchanger and one connection point is where refrigerant exits the heat exchanger. Two of the connection points are at the same header and during at least part of the defrost cycle, at least part of the hot refrigerant gas is passed through that header without passing through any cross tubes of the heat exchanger. A defrost valve in a refrigerant conduit opens during the defrost cycle to deliver hot refrigerant gas to the connection point on the header. In a number of embodiments, the defrost valve is open only during a portion of the defrost cycle.

Abstract: An air conditioner is provided. The air conditioner includes a heat exchanger which exchanges heat with air by passing a coolant therethrough; and an anti-freeze apparatus which prevents the freeze of water on the surface of the heat exchanger by supplying energy to the heat exchanger. The air conditioner can prevent the freeze of water on the surface of the heat exchanger during its operation, and thus, there is no need to perform a defrost operation during the operation of the air conditioner. In addition, the air conditioner can continuously and efficiently perform an air conditioning function.

Abstract: Heat pumps with improved defrost cycles, methods of defrosting heat exchangers, and methods of improving the effectiveness of defrost cycles of heat pumps, for example, having a microchannel outdoor heat exchanger. A defrost valve in a refrigerant conduit opens during a defrost cycle to deliver hot refrigerant gas to a portion of the heat exchanger that otherwise defrosts more slowly or less completely than other portions of the heat exchanger. Particular embodiments pass hot refrigerant gas through a header of the heat exchanger, such as a bottom header. In a number of embodiments, the defrost valve is open only during a portion of the defrost cycle. Further, in some embodiments, the fan that is used to blow air through the heat exchanger is operated in a reversed direction during at least part of the defrost cycle to counteract natural convection through the heat exchanger.

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.

Abstract: An air conditioner is provided. The air conditioner includes a heat exchanger which exchanges heat with air by passing a coolant therethrough; an anti-freeze apparatus which prevents the freeze of water on the surface of the heat exchanger by supplying energy to the heat exchanger; and a control unit which controls the anti-freeze apparatus according to operating conditions of the air conditioner. Therefore, the air conditioner can effectively prevent the freeze of water, if any, on the surface of the heat exchanger.

Abstract: A refrigerator is provided that includes a chilled interior and a cooling circuit for a coolant, the cooling circuit being provided with an evaporator, a compressor, and a condenser. The refrigerator further includes a controller as well as a fan for cooling the condenser and the compressor. The controller controls the fan to operate during an idle phase of the compressor.