Abstract: An air return bulkhead having a filter for filtering dust, dirt and debris out of an airflow prior to its entry into an evaporator or heat exchanger. The apparatus is particularly designed for use within a climate-controlled space such as a trailer or truck interior. Air pulled into the refrigeration system first enters the air return bulkhead where particles and debris are filtered. The air then travels through the refrigeration system and back into the climate-controlled space.

Abstract: An air circulation system mounted within a chamber is provided. The chamber receives a product to be tested or processed. The air circulation system comprises an enclosure defined within the chamber with at least one inlet formed in the enclosure for receiving air from the chamber. A pair of counter rotating fans are mounted within the enclosure adjacent the inlet for circulating the air. Additionally, at least one air diverter plate is mounted within the enclosure adjacent the fans for diverting the circulating air substantially across the width of the enclosure. Furthermore, at least one air outlet is formed in the enclosure for introducing circulating air into the chamber about the product being tested or processed.

Abstract: An air conditioning cooling apparatus and method which includes the steps of supplying cooling air generated from a cooling apparatus into an air passageway formed below a floor; guiding the cooling air within the air passageway into an equipment assembly disposed on the floor through an opening located in the floor; communicating the cooling air introduced into the equipment assembly into a plenum and introducing the air released from within the equipment into the plenum and communicating the released air through the cooling apparatus for cooling the released air. The method permits temperature differential between the air supplied to the air passageway and the air introduced into the plenum from the equipment assembly to be 45° F. to substantially 40° F. so as to reduce the power necessary for operating on the fan of the blowing apparatus. The equipment assembly utilizes an air flow control mechanism so as to substantially evenly distribute cooling air to the equipment.

Abstract: This invention provides a fundamentally new approach to air conditioning. In a conventional air-conditioning system air the full volume of air is cooled below the dew point to provide both sensible and latent cooling. In the new system, dehumidification and sensible cooling functions are preferably separate. The separate dehumidification allows for much higher supply air temperatures, preferably within about 10° F. of the space temperature. Low-velocity air distribution through a ceiling plenum or a vent into the space allows for very low fan static pressures, which greatly reduces fan energy use compared to conventional ducted systems. The low static pressures and high supply-air temperatures allow the use of existing drop ceiling construction with little modification. The system can also include low-cost thermal storage. Latent thermal storage is in the form of a concentrated liquid desiccant solution. Chilled water storage is another option.

Abstract: A refrigerated soda vending machine includes sensors for monitoring various parameters such as temperature within its refrigerated chamber and for monitoring occupancy in the vicinity of the chamber. The sensor data is used to determine when to switch between a normal mode of operation and a power-conservation mode of operation. In either mode of operation, a cooling system is regulated so that a compressor goes on when an upper internal temperature threshold is reached and off when a lower internal temperature threshold is reached. In the normal mode of operating, fans circulate air within the chamber to maintain a relatively uniform temperature throughout the chamber. During power-conservation mode, the fans are off most of the time the compressor is off. In the absence of circulation, the temperature within the refrigerated chamber stratifies so that a lower cool zone and an upper warm zone can be differentiated. Soda cans are held in vertical stacks so that the lowest cans are located in the cool zone.

Abstract: A two stage reciprocating compressor and associated HVAC systems and methods are disclosed. The reciprocating compressor includes a crankshaft having an eccentric crankpin, a reversible motor for rotating the crankshaft in a forward and a reverse direction, and an eccentric, two position cam rotatably mounted over the crankpin. The crankshaft and cam combine to cause the piston to have a first stroke when the motor operates in the forward direction and a second stroke when the motor operates in the reverse direction. The cam and crankpin also include stabilization means to restrict the relative rotation of the cam about the crankpin. A lubrication system is provided to lubricate the engaging surfaces of the crankshaft and cam and between the cam and the bearing surface of the connecting rod. There is also provided a control for selectively operating the motor either in the forward direction at a first power load or in the reverse direction at a reduced second power load.

Abstract: Methods and apparatus for pressure equalization port devices, which are particularly suited for preventing vacuum seals in ultra low freezers are disclosed. An application of the pressure equalization port method and apparatus to ultra low freezers is also disclosed.

Abstract: A cooling system and related method of defrosting a refrigeration unit or a freezer unit involves the steps of (a) monitoring a compressor running time, (b) monitoring an evaporator coil temperature, (c) monitoring a first time period since a last cooled compartment door open alarm of the unit, (d) monitoring a second time period since a last defrost operation, (e) monitoring a third time period during which the cooled compartment door is closed, and (f) controlling initiation of a defrost operation as a function of the monitored compressor running time, the monitored evaporator coil temperature, the monitored first time period, the monitored second time period, and the monitored third time period. Various sets of conditions may be established for triggering initiation of the defrost operation. The system may also detect refrigerant leaks and a clogged condenser as a function of compressor running time and compressor discharge line temperature.

Abstract: A driving controlling apparatus of a hood motor, including: hood motor means rotatably driven for ventilating the inner portion of a system; main controlling means for generating control signals for controlling the operation of the hood motor; sub-controlling means for controlling the driving of the hood motor by sensing temperature changes in the system; and driving circuit means for controlling the driving of the hood motor in accordance with the control signal of the main controlling means and the driving controlling of the sub-controlling means.

Abstract: An apparatus operated in response to a load in a home bar of a SXS refrigerator having the home bar at one side of its door and a cooling air circulator including: a refrigerating chamber temperature sensor for sensing a temperature change of a refrigerating chamber; a home bar temperature sensor for sensing a temperature change of the home bar; and a microprocessor for comparing a temperature change amount of the home bar sensed by the home bar temperature sensor and the temperature change amount of the refrigerating chamber sensed by the refrigerating chamber temperature sensor after a load is inputted to the home bar, and setting a temperature of the refrigerating chamber at a lower degree in accordance with the comparison result and accordingly driving a cooling air circulator.

Abstract: A temperature sensor is disposed to sense refrigerant temperature discharging from the evaporator of a vehicle air conditioning system. The temperature is averaged over the sampling interval and is inputted to an electronic controller. The controller computes the temperature set points from a lookup table based upon blower speed and blend door settings and cycles the compressor if the averaged temperature is outside the set points.

Abstract: This invention provides a fundamentally new approach to air conditioning. In a conventional air-conditioning system air the full volume of air is cooled below the dew point to provide both sensible and latent cooling. In the new system, dehumidification and sensible cooling functions are preferably separate. The separate dehumidification allows for much higher supply air temperatures, preferably within about 10° F. of the space temperature. Low-velocity air distribution through a ceiling plenum or a vent into the space allows for very low fan static pressures, which greatly reduces fan energy use compared to conventional ducted systems. The low static pressures and high supply-air temperatures allow the use of existing drop ceiling construction with little modification. The system can also include low-cost thermal storage. Latent thermal storage is in the form of a concentrated liquid desiccant solution. Chilled water storage is another option.

Abstract: A modular air handling supply system and method for producing a supply of cooled air for cooling purposes is disclosed. The modular air handling supply system includes a module container and ducting for transporting the air within said module container and a blower in operational connection with the ducting, wherein the cooled air is propelled to at least one resource or facility, each of which are located external to the module container. The system has the capability of supplying a remote resource or facility with a variable volume and temperature of cooled air.

Abstract: A system and method for providing conditioned air to the interior space of a building includes separate dehumidification and sensible cooling functions. The separate dehumidification allows for much higher supply air temperatures, preferably within about 10° F. to about 15° F. of the air temperature of the building space. Low-velocity air distribution through a ceiling plenum or a vent into the space allows for very low fan static pressures, which greatly reduces fan energy usage compared to conventional ducted systems. The low static pressures and high supply-air temperatures allow the use of existing drop ceiling construction with little modification. Optional return air channels between an inner glazing and an outer glazing of exterior windows can virtually eliminate heating loads at the building perimeter, which virtually eliminates the need for simultaneous heating and cooling. The result is a major improvement in energy efficiency and comfort while reducing installed cost of the system.

Abstract: Side by side type refrigerator and method for controlling a temperature in a vegetable box therein, the method including the steps of (1) sensing the temperature in the vegetable box in a lower portion of a refrigerating chamber, and comparing the temperature in the vegetable box to a preset temperature of the vegetable box, under a state operation of the refrigerator is stopped, and (2) opening a damper in an upper portion of the refrigerating chamber when the temperature in the vegetable box is higher than the preset temperature in the vegetable box as a result of the comparison, and closing the damper when the temperature in the vegetable box is lower than the preset temperature in the vegetable box as the result of the comparison, thereby supplying the cold air in the freezing chamber to the vegetable box in the refrigerating chamber by means of natural circulation when the damper is opened, whereby supplying appropriate cold air to the vegetable box without separate cold air duct.

Abstract: A dehumidifier comprising hot and cold water supply pipes interconnected to a showerhead in a bathroom, a hot heat exchanger interconnected to the hot water supply pipe, fan means to pull air from an adjacent room across the hot air exchanger and into the bathroom, and an exhaust fan to remove air from the bathroom

Abstract: Containers for transportation of bulk cargo susceptible to spoilage, that have a controlled temperature profile. The refrigerated containers include opposed insulated side walls each of which include internal channels for carrying return air from the floor of the container upward into a plenum. Each plenum is closed at one end, and in fluid communication with a refrigeration unit at the other end to supply return air to the refrigeration unit. Refrigerated air is blown from the refrigeration unit into a central air distribution duct that extends longitudinally along the roof of the container. The central duct is supplied with a multiplicity of spaced apart apertures, and is preferably tapered from a widest point in the vicinity of the refrigeration unit. Thus, substantially equal refrigerated airflow can be obtained throughout the refrigerated container.

Abstract: A refrigerated showcase has a front opening through which a consumer can view and access foodstuffs on display. The foodstuffs are cooled by coolant air introduced through a slanted, perforated, interior panel located near a rear wall of the showcase. An air curtain directed downwardly at the front opening minimizes coolant air loss through the opening. Lips are applied and extended from edges of vertical sides of the access opening to reduce the loss of coolant air through the air curtain. Thus, relative flows of the coolant air and the air curtain are maintained inside the showcase.

Abstract: A temperature control apparatus for a refrigerator and a control method therefor, mount an air circulation fan in addition to a prior refrigerating fan into the refrigerating compartment, drive the air circulation fan together with the refrigerating fan or drive only the air circulation fan, obtain a uniform cooling effect of a refrigerating compartment, feebly circulate a cool air when opening a door of the refrigerating compartment, and quickly cool the refrigerating compartment after closing the door.

Abstract: A method [and an apparatus are] is disclosed for detecting an occurrence of a liquid dry condition in a container containing a liquefied compressed gas while the gaseous phase of the liquefied compressed gas is being removed from the container over time. The [apparatus includes] method uses a first sensor, a second sensor, and a computer, preferably a programmed logic controller (PLC). The first sensor senses temperature (T) inside the container and provides a signal indicative thereof. The second sensor senses pressure (P) inside the container and provides a signal indicative thereof. The computer receives signals from the first and second sensors, and determines the rates of change in the pressure (dP/dt) and the temperature (dT/dt) inside the container over time.

Abstract: A uniform cooling apparatus for a refrigerator and a control method thereof install a plurality of temperature sensors into a refrigerating compartment, mount an air circulation fan in addition to a prior refrigerating compartment fan into the refrigerating compartment, and thus obtain a uniform cooling effect by minimizing a refrigerating compartment temperature deviation. The uniform cooling apparatus includes: a plurality of temperature sensors which are mounted to at least two positions inside of the refrigerating compartment; and an air circulation fan which is additionally mounted to the refrigerating compartment, is turned on or off according to a deviation among temperatures sensed by the plurality of temperature sensors, and makes a uniform cool air in the refrigerating compartment.

Abstract: A heat exchanger comprising a precooler and reheater core adjacent a chiller core, first heat transfer passages extending through both cores through which incoming air passes in a first direction, second heat transfer passages extending through the chiller core through which coolant passes in heat exchange relationship with incoming air and perpendicular to the first direction, and third heat transfer passages extending through the precooler and reheater core through which cooled air from the chiller core passes in heat exchange relationship with the incoming air and perpendicular to the first direction. A manifold contiguous with both cores conducts chilled air from the chiller core to the third set of heat transfer passages.Incoming air is chilled in the chiller core and thereafter exchanges heat with the incoming air in the precooler and reheater core to precool the incoming air to form water droplets and to raise the temperature of the chilled air to a usable temperature.

Abstract: A heat exhaust system for installation in the space behind the refrigerator of a recreational vehicle for disposal of heat that builds up behind an RV refrigerator from the operation thereof. The system operates automatically to turn on a fan to dissipate the heat at a predefined high temperature, and operates automatically at a predefined low temperature to turn off the fan thereof.

Abstract: A cool air exhaling apparatus in an enforced circulation type refrigerator and a control method thereof having a simple configuration so as to reduce manufacturing costs and to improve productivity, as well as freezing and refrigerating efficiency of foods. The cool air exhaling apparatus in an enforced circulation type refrigerator in which a cool air cooled by an evaporator is guided to a duct by operating a cool air circulating fan and is exhaled into the refrigerator through a cool air exhaling hollow formed in a duct cover, includes at least one cool air guide formed protrusively at the front of a duct cover in a width direction of the refrigerator, having a cool air exhaling hollow in its inner sidewall, and a duct thermal insulation material in which a cool air guide hollow having a convex curved side portion connected to the inner sidewall of the cool air guide is formed in sides of the duct cover.

Abstract: A method of controlling supply air temperature in an enclosure refrigerated with a refrigeration cycle including an evaporator exhibiting a temperature differential, is disclosed. The method includes the steps of defining a supply temperature limit constant and a setpoint; sensing supply air temperature; sensing return air temperature; comparing supply air temperature to the supply temperature limit constant; increasing supply air temperature if supply air temperature drops below the constant and at least one of additional determinable factors is sensed, thereby reducing cooling capacity; and increasing cooling capacity without substantially effecting the temperature differential at the evaporator.

Abstract: A method for operating a blower of an vehicle air conditioning (a/c) system after ignition off for purging moisture from an evaporator core includes accumulating a/c system data while the a/c system is operating including a/c on time, duty cycle, ambient temperature and mode of operation. When the ignition switch is turned off terminating operation the a/c system, updated data is saved for use in a look up table. A moisture index is selected from the look up table after ignition off as a function of a/c duty cycle, ambient temperature and mode of operation. The moisture index is a measure of the amount of moisture accumulated on the evaporator core which is a function of the a/c duty cycle, ambient temperature and fresh air or recirculated air mode of operation. The blower operates at a speed and for a duration dictated by the moisture index to purge moisture rather than simply operating for a set period of time regardless of moisture present.

Abstract: An apparatus for and a method of supplying cold in a refrigerator, wherein respective temperatures at a plurality of different portions of the interior of the refrigerator are sensed so that cold air is selectively supplied to each refrigerator portion based on the sensed temperature associated with the refrigerator portion, thereby effectively maintaining the refrigerating and freezing compartments of the refrigerator at predetermined temperatures, respectively. The apparatus and method are also configured to concentratedly supply cold air to a portion of the refrigerating compartment of the refrigerator in which a new load is stored. When at least one of the sensed temperatures of the freezing compartment and different portions of the refrigerating compartment is higher than an associated set temperature, concentratedly supplying cold air to the compartment or compartment portion exhibiting the temperature higher than the set temperature.

Abstract: Disclosed is a method of controlling a cool air dispersing operation of a refrigerator for maintaining the temperature in a cooling compartment uniform. Many horizontal dispersing blades and vertical dispersing blades of planar plate shape, which respectively control the horizontal and vertical discharge directions of cool air are installed in a cool air duct. The blades are continuously rotated while a deviation of temperature in the cooling compartment is smaller than a predetermined value, whereby the cool air in the cooling compartment is successively supplied into the respective areas in the cooling compartment. Meanwhile, if the deviation is greater than the predetermined value, the blades are stopped at a specific position so that the cool air is discharged toward an area of which temperature is high. Thus, the temperature in the cooling compartment becomes uniform in a short period of time. Further, no vortex of cool air is generated since the blades are shaped into a planar plate.

Abstract: The present invention provides a body cooling garment to easily and effectively cool the human body. By pressurizing air or other compressible gases to a minimum pressure rating of 70 psi and channeling it by means of a tubing network that is incorporated into body garments such as vest, head covers, and pants, the pressurized air can be transported and dispensed on the individual. Thus a two fold cooling affect is accomplished. First, initial cooling is achieved by the cooling of the pressurized gas itself as it rapidly depressurizes and expands though openings in the tubing resulting is a very cold gas. This affect combined with the flow of air and gases that is created by this expansion of pressurized gas in the vicinity of the body of an individual wearing such a garment will evaporatively cool the body and compliment the cooling caused by the rapid depressurization of the compressed gas.

Abstract: An air conditioner system has a boiler for generating a refrigerant vapor from a liquid refrigerant therein and a condenser for condensing the refrigerant vapor to the liquid refrigerant. An expander connects the boiler and the condenser to generate output energy when the refrigerant vapor passes therethrough from the boiler to the condenser in a first direction. A fan produces an ambient air flow through the boiler and the condenser to provide heat input for vaporizing the liquid refrigerant in the boiler and cooling the air flow and for extracting heat from the condenser to condense the refrigerant vapor to the liquid refrigerant. A water mist is generated that contacts the air flow intermediate the boiler and the condenser for further cooling the air flow through heat of vaporization of the water so that air exiting the condenser is cooler than the ambient air flow entering the boiler.

Abstract: A refrigeration system is disclosed in which temperature regulation and energy efficiency are improved. Each compartment to be cooled is provided with a variable speed fan, the speed of which is controlled dependent on that compartment's temperature, the temperature required of that compartment, and the difference between required and actual temperatures for any other compartments. The temperatures are monitored continually and fan speeds altered so that the compartment furthest from its required temperature receives the most cooling (highest fan speed). An alternative embodiment is also disclosed wherein the speed of one compartment's fan is fixed and the other varied.

Abstract: An air conditioning installation for the cabin of a motor vehicle comprises an air treatment and distribution unit having an upstream chamber containing a fan and a downstream chamber containing distribution valves for distribution of treated air to the cabin. The two chambers are separated by an evaporator, through which air is driven by the fan into the downstream chamber. A collector for recovery of condensates is located below the evaporator and drains to outside the vehicle. The installation includes control means arranged to operate an automatic scavenging cycle immediately prior to the start of a period of air conditioning operation. This cycle consists in closing all the distribution valves and then running the fan for a predetermined scavenging period so as to drive the stale air out of the interior of the unit.

Abstract: An air-conditioning unit is provided for a vehicle with an air-conditioning function depending on the outside dew point. The air-conditioning unit includes a device for determining the dew point temperature of the outside air, an air duct leading to a window of the vehicle and having a controllable closing device, a device for determining the temperature of the air blown through the ducts leading to the window of the vehicle and a control device for automatically opening and closing the air duct leading to a window of the vehicle by appropriately energizing the air duct closing device. The control device, in the cooling operation of the air conditioning unit, opens and closes this air duct automatically as a function of the dew point temperature determined for the outside air and as a function of the temperature determined for the air blown out through this air duct.

Abstract: For achieving an air conditioner being applicable to various a-c source voltages in common and operative with high power factor by suppressing generation of high harmonics, an a-c source voltage from an a-c electric power source 1 is rectified in full-wave by a rectifier 2, and a d-c source voltage Ed of an inverter 13 is obtained by being charged in a condenser 5. Here, there are a-c source voltages of 100 V and 200 V, and a divided voltage Ed1 of the d-c voltage of the condenser 5 is selected when the a-c source voltage is 100 V, a divided voltage Ed2 (here, Ed1>Ed1) of the d-c voltage of the condenser 5 is selected when the a-c source voltage is 200 V, respectively by an exchange switch 18, and is used as a d-c voltage Ed' for controlling on and off of a switch element 6.

Abstract: A domestic air conditioning and/or heating method, particularly for apartment buildings, using an outside unit (2) and an inside unit (1) connected to one another via fluid and electrical lines (3). The outside unit (2) includes a compressor, a ventilation system and an exchanger while the inside unit (1) includes a ventilation system and an exchanger. A low pressure inside unit (1) supplies pressurized air at a pressure no higher than 8 mm and the air is bulk-fed into a false ceiling (6) forming a decompression chamber and comprises supply grills (15-17) for blowing air into each of the rooms to be served.

Abstract: Method for refrigerating showcases characterized by the steps of cooling air within a refrigerating unit to a temperature below the predetermined temperature in showcases and feeding said cooled air as refrigerating source into said showcases through feeding piping; mixing said cooled air with air in said showcases thereby to carry out refrigerating in said showcases while collecting said air in said showcases in the same quantity of said cooled air fed into said showcases through collecting piping into said refrigerating unit; and cooling said collected cooled air in said refrigerating unit for using again said collected and cooled air as refrigerating air.The refrigerating device according to the invention has lower initial and running costs and can effectively utilize the internal space of showcases and automatic vending machines for goods containing use.

Abstract: An air flow system for the freezer compartment of a refrigerator includes air inlets located at an upper rear portion of the freezer compartment which direct a supply of cooling air forward and against both top and side walls of the compartment. The air then flows along an upper portion of the compartment toward a front thereof where it is re-directed downward and rearward. The bottom wall of the freezer compartment is provided with a plurality of upstanding, laterally spaced ribs upon which food items can be supported. Since the ribs are spaced, numerous channels are formed which extend from the front portion of the compartment to adjacent the rear wall. A gap is preferably created between the rear wall and the ends of the ribs such that air is permitted to flow laterally along a lower rear portion of the compartment. Air outlets or returns are also provided in the lower rear portion of the compartment for recycling of the air.

Abstract: A temperature controlling method and apparatus for a refrigerator by controlling the velocity of a rotary blade are provided. In the temperature controlling method, a fuzzy model for inferring an equilibrium velocity corresponding to the rotation velocity of the rotary blade, required for the temperature equilibrium within a refrigeration compartment, is constituted and then the fuzzy inference is performed based on the fuzzy model using the change in temperature measured at a predetermined number of portions within the refrigeration compartment to calculate the equilibrium velocity, thereby controlling the rotation velocity of the rotary blade according to the calculated equilibrium velocity.

Abstract: An air conditioning installation designed with regard to achieving a comfort temperature as well as meeting heat load requirements for a conditional space. The comfort temperature being dependent upon the velocity of the air flow in the space and the design being established by an iterative process until the comfort temperature differs from the exit temperature of the space within predetermined limits.

Abstract: A temperature controlling apparatus adopting a fuzzy adaptation model and a method using the same are provided, in which temperatures of a plurality of positions of a refrigeration compartment are estimated in order to rapidly reach temperature equilibrium of the refrigeration compartment, by considering the operation states of a compressor and a cooling fan which directly affect the temperature of the refrigeration compartment. The temperature controlling apparatus adopting the fuzzy inference includes: a cool air discharge direction controller for controlling the rotation angle of a cool air discharge control blade; and a fuzzy inference unit for inferring peripheral temperatures of temperature sensors by taking the operational states of the cooling fan and the compressor as inputs, in order to provide the cool air discharge direction controller with information with respect to the static angle of the blades of the cool air discharge control blade.

Abstract: An air curtain fan driving controlling method and apparatus control a driving of an air curtain based on the temperature inside a refrigerating compartment of a refrigerator and the temperature outside a refrigerating compartment thereof. In the method, a reference temperature for controlling a temperature inside a refrigerating compartment is set. The normal cool operation for the refrigerating compartment is executed. It is judged whether an open door for the refrigerating compartment is detected during the normal cooling operating. In the previous step, when the door-close is detected, the temperature inside the refrigerating compartment and the temperature outside the refrigerating compartment is detected. An absolute value between a difference of the temperature inside a refrigerating compartment and the temperature outside the refrigerating compartment is compared with the set reference temperature to control a driving of the air curtain fan.

Abstract: A room air conditioner includes an air inlet, an air outlet, a heat exchanger disposed between the inlet and outlet, and an air circulation fan. The inlet is opened and closed by motor-driven inlet vanes. The outlet is opened and closed by a vertically slidable motor-driven door. Air direction control vanes extend across the outlet for varying the direction of discharged air. Before the door is either opened or closed, the air control vanes are automatically swung upwardly to a clearance position to avoid interfering with movement of the door. When the inlet and outlet are to be closed, the inlet vane motor is actuated prior the door motor to ensure that the inlet and outlet are fully closed simultaneously, even though it takes longer for the inlet vanes to travel to their fully closed state. A sensor determines when the door reaches an almost-closed state, and the door motor continues to operate for a set period thereafter to ensure that the door becomes fully closed.

Abstract: An air conditioner includes an inlet for receiving room air, a heat exchanger for heating or cooling the air, an outlet for discharging the heated or cooled air back into the room, a fan for circulating the air through the air conditioner, inlet and outlet doors for opening/closing the inlet and outlet, a motor for driving the doors, and a controller for automatically actuating the motor to open the doors when the air conditioner is activated, and close the doors when the air conditioner is deactivated. A control by-pass is provided in a remote controller which is relatively inaccessible to a normal user but which can be actuated by an air conditioner tester or shipper for maintaining the doors open even when the air conditioner is deactivated (e.g., during testing or shipping) to prevent the doors from being damaged.

Abstract: A refrigerator having an opening degree control means and a control method thereof which have an opening degree control means for controlling a refrigerant flow provided into each evaporator, and thus enhance an energy efficiency, in a refrigerator which independently cools or maintains the freezing and refrigerating compartments at different temperatures by including an evaporator in each of the freezing and refrigerating compartments.

Abstract: Disclosed is a refrigerator-freezer unit having upper and lower storage compartments which are separated by a divider member. The lower compartment functions as a freezer and the upper compartment is selectively operable as either a freezer or a refrigerator.

Abstract: An operation control device for a refrigerator which can maintains freshness of food and drink for a long time by supplying a cold-storage room with cool air remaining in an evaporator by opening a cold-storage room damper and driving a fan motor until a present temperature of the evaporator sensed by an evaporator temperature sensor is above the temperature of the evaporator sensed while the driving of a compressor motor is stopped, by a predetermined temperature if the present temperature of the cold-storage room sensed by a cold-storage room temperature sensor is above a predetermined temperature set in the cold-storage room while the driving of the compressor motor is stopped.

Abstract: A temperature controlling method and apparatus for a refrigerator are provided, in which a temperature-equilibrating position into which cool air is to be discharged is calculated based on a fuzzy model and learning of a neural network, using the change in temperatures measured by only a small number of temperature sensors at a predetermined number of portions within a refrigeration compartment, and then the rotation velocity of a ventilation fan and a stop angle of a rotary blade are controlled according to the calculated temperature-equilibrating position. As a result, the cool air is appropriately discharged into each portion according to the distance between the rotary blade and a target position, so that the optimal temperature equilibrium is obtained in the refrigeration compartment.

Abstract: A refrigerator has a device for generating an air curtain, and the air curtain generating device operates according to the sensor for sensing the opening/closing of the door and the temperatures in the cooling compartment sensed by temperature sensors. The air curtain is generated when the door is opened and when the temperature of the area near the door is higher than the temperature of the area distant from the door. Thus, the area near the door in the cooling compartment is efficiently cooled when the door is closed, and the operation for generating an air curtain is exactly performed when the door is opened even if the sensor for sensing the opening/closing of the door is out of order.

Abstract: This invention relates to a suction inlet/discharge outlet opening or closing apparatus for an air conditioner having a function to close a suction inlet and a discharge outlet at the time of recovery of electric power, with reference to a time duration retrieved from an appropriate storage containing the time duration counted during a closing/opening of the suction inlet and discharge outlet, and a method therefor.

Abstract: A temperature controlling method is provided for a separate cooling refrigerator having a rotary blade in which a freezer compartment and a refrigeration compartment having the rotary blade at the rear wall thereof are separately cooled by installing an evaporator and a ventilation fan in each compartment, and a refrigerant is properly provided to each ventilation fan for the freezer and refrigeration compartments by a compressor. According to the method, a stationary angle of the rotary blade is controlled to discharge cool air into the highest-temperature portion within the refrigeration compartment, inferred by a fuzzy inference, and a cool air discharging cycle is also controlled by the compressor and the ventilation fan for the refrigeration compartment, maintaining the temperature equilibrium within the refrigeration compartment.