Abstract: The present invention relates to a system for cooling a quick-freezing chamber at ?40 to ?30° C., a freezing chamber at ?20 to ?15° C., a refrigerating chamber at 0 to 5° C., and the like and an energy-saving defrosting system for defrosting the quick-freezing chamber, the freezing chamber, and the refrigerating chamber using condensed waste heat.

Abstract: The present invention relates to an energy saving refrigeration and defrosting system through 3 stage condensation heat exchangers. More specifically, the high-temperature vapor refrigerant in the refrigeration system is condensed using 3 stage condensation heat exchangers such as a tubular tube, a condensation heat exchange tank and a brine tank. This invention relates to an energy saving refrigeration and defrosting system using 3 stage condensation heat exchangers in place of a conventional refrigeration condenser.

Abstract: Disclosed is a heat pump heating/cooling system that uses a hybrid heat source that may include air heat, groundwater heat, brine and in-line heaters. The heat pump includes 1) a device for compressing, condensing, gasifying, and circulating cooling/heating media and exchanging heat with water refrigerant; 2) a device for storing heat energy in a storage tank; 3) a device for loading a load through a four-way fan coil unit; and 4) a control panel. To remove frost on the exterior of an evaporator, the evaporator is temporarily stopped, and brine at a temperature of 15° C. to 20° C., which receives groundwater heat from a brine heat exchanger and receives heat from an in-line heater, is supplied to a brine supply pipe installed around the evaporator to melt and remove the frost on the exterior of the evaporator and then is discharged at a temperature of ?3° C. to 5° C.

Abstract: An apparatus for defrosting an evaporator in a refrigeration system using an infrared emitting diode includes i) a frost detection sensor configured to receive a frost sensing signal from an output part of a control processor and to transmit a frost detection signal into an input part of a control processor, wherein the frost detection signal is generated by projecting infrared to the frost and receiving reflection-infrared from the frost; ii) a control processor configured to convert the frost detection signal into a digital signal in the signal converting part, to evaluate if the frost detection signal is higher than a threshold value which is set from a signal setting part, and to transmit the operation signal to the defroster, as well as the display signal to the signal display part; and iii) a defroster.

Abstract: Disclosed is a heat pump heating/cooling system that uses a hybrid heat source that may include air heat, groundwater heat, brine and in-line heaters. The heat pump includes 1) a device for compressing, condensing, gasifying, and circulating cooling/heating media and exchanging heat with water refrigerant; 2) a device for storing heat energy in a storage tank; 3) a device for loading a load through a four-way fan coil unit; and 4) a control panel. To remove frost on the exterior of an evaporator, the evaporator is temporarily stopped, and brine at a temperature of 15° C. to 20° C., which receives groundwater heat from a brine heat exchanger and receives heat from an in-line heater, is supplied to a brine supply pipe installed around the evaporator to melt and remove the frost on the exterior of the evaporator and then is discharged at a temperature of ?3° C. to 5° C.

Abstract: The present invention relates to an apparatus for defrosting an evaporator in refrigeration system using infrared emitting diode sensor comprising: i) a frost detection sensor (50) configured to receive the frost sensing signal from the output part of a control processor (60), and to transmit the frost detection signal into the input part of a control processor (60), wherein the frost detection signal is generated by projecting infrared to the frost and projecting and receiving reflection-infrared from the frost; ii) a control processor (60) configured to convert the frost detection signal into digital signal in the signal converting part, to evaluate if the frost detection signal is higher than threshold value which is set from signal setting part (61), and to transmit the operation signal to the defroster (70) as well as the display signal to the signal display part (62); and iii) a defroster (70) configured to be operated depending on the signal from the control processor (60).

Abstract: A multilayer ceramic capacitor includes: a ceramic body including dielectric layers and first and second internal electrodes disposed to face each other with respective dielectric layers interposed therebetween; and first and second external electrodes disposed on an external surface of the ceramic body, wherein the dielectric layer contains a barium titanate-based powder particle having a core-shell structure including a core and a shell around the core, the shell having a structure in which titanium is partially substituted with an element having the same oxidation number as that of the titanium in the barium titanate-based powder particle and having an ionic radius different from that of the titanium in the barium titanate-based powder particle, and the shell covers at least 30% of a surface of the core.