A system for cooling a plurality of processors in a data center is disclosed. The cooling system includes a refrigeration system having a compressor for compressing a carbon dioxide (CO2) working fluid, an air cooled heat exchanger downstream from the compressor and located out-of-doors for cooling the working fluid, an expansion device downstream from the heat exchanger, a cooling device located within the data center in which the working fluid is expanded to cool the processors by circulating the cooled air around the processors, and a return line for the return of the working fluid from the cooling device to the compressor.

A system for cooling a plurality of processors in a data center is disclosed. The cooling system includes a refrigeration system having a compressor for compressing a carbon dioxide (CO2) working fluid, an air cooled heat exchanger downstream from the compressor and located out-of-doors for cooling the working fluid, an expansion device downstream from the heat exchanger, a cooling device located within the data center in which the working fluid is expanded to cool the processors by circulating the cooled air around the processors, and a return line for the return of the working fluid from the cooling device to the compressor.

A double pipe forms an inner flow path, through which a low-pressure side refrigerant flows, inside an inner pipe, and forms an inner-outer flow path, through which a high-pressure side refrigerant flows, between the outer pipe and the inner pipe. It comprises an expansion valve side connector and a counter-expansion valve side connector which are interposed between distal ends of the outer pipe and the inner pipe and members to be connected. An outer diameter of the outer pipe is 30 millimeters or less. A ratio of a difference between an inner diameter of the outer pipe and an outer diameter of the inner pipe with respect to the inner diameter of the outer pipe is 25% or less. A sealing member is provided to prevent a refrigerant leakage. The plurality of members are mechanically fixed.

A double pipe forms an inner flow path, through which a low-pressure side refrigerant flows, inside an inner pipe, and forms an inner-outer flow path, through which a high-pressure side refrigerant flows, between the outer pipe and the inner pipe. It comprises an expansion valve side connector and a counter-expansion valve side connector which are interposed between distal ends of the outer pipe and the inner pipe and members to be connected. An outer diameter of the outer pipe is 30 millimeters or less. A ratio of a difference between an inner diameter of the outer pipe and an outer diameter of the inner pipe with respect to the inner diameter of the outer pipe is 25% or less. A sealing member is provided to prevent a refrigerant leakage. The plurality of members are mechanically fixed.

A refrigerator includes a main body that has a storage chamber and a drying chamber; a thermoelectric module that includes a heat absorber and a heat dissipater; a cooling fan that circulates air in the storage chamber to the heat absorber and the storage chamber; a heat-dissipating fan that blows air to the heat dissipater; an air guide that has a passage for guiding air heated by the heat dissipater to the drying chamber; a heater that is disposed in the passage; and a damper that controls a flow of air in the passage between the heat-dissipating fan and the heater. Heat of the heat dissipater transfers to the drying chamber through the passage of the air guide and the damper, thereby being able to dry an object to be dried.

A throttling device is equipped with a valve seat in which a valve port for connecting a primary chamber and a secondary chamber is formed, a needle valve, a needle section which is inserted into the valve port, a guide section for guiding a slide shaft of the needle valve, and a coil spring for biasing the needle valve in a valve-closing direction. The guide section and the coil spring are positioned on the primary chamber side. The coil spring is covered by a stopper section. A gap between the stopper section and a main body case functions as a main body path for delivering a refrigerant from the primary chamber to the valve port.

A clamp (204) for securing an expansion valve (XV) bulb (114) to a vapor header in a refrigeration system is provided. Aspects includes an arcuate member (210) having a first clamping portion (206) and a second clamping portion (208) extending therefrom and a terminal end of the first clamping portion having a first flange (212) and a terminal end of the second clamping portion having a second flange (214). The first clamping portion (206) and the second clamping portion (208) are configured to envelope the expansion valve (XV) bulb (114) and a vapor header in a refrigeration system.

An air conditioning system and a startup control method. The air conditioning system includes: a compressor, a condenser, a thermal expansion valve and an evaporator connected via a pipeline; and a thermal temperature sensing bulb disposed on an outlet pipeline of the evaporator and associated with the thermal expansion valve; the air conditioning system further includes a thermal power source which is thermally coupled to the thermal temperature sensing bulb and controlledly cools or heats the thermal temperature sensing bulb. The thermal temperature sensing bulb is cooled or heated, as needed, by a thermal power source thermally coupled to the thermal temperature sensing bulb, thereby enabling the thermal expansion valve associated with the thermal temperature sensing bulb to be opened and closed more smoothly.

The present invention provides an expansion valve which is compact and can further enhance muffling performance. The expansion valve includes a valve main body including an inlet passage configured to introduce a high-pressure refrigerant, a valve chamber configured to communicate with the inlet passage, an expansion chamber that includes an orifice configured to reduce a pressure of the refrigerant introduced into the valve chamber, and an outlet passage disposed downstream of the expansion chamber and configured to discharge the refrigerant that passes through the expansion chamber, a rectifier disposed in the valve main body and configured to partition the expansion chamber and the outlet passage, a valve member configured to open and close the orifice, and a valve member driving device configured to drive the valve member. The rectifier includes a hollow convex portion projecting toward the outlet passage and a throttle hole formed at a distal end of the hollow convex portion, and the refrigerant that enters the expansion chamber when the orifice opens passes through the throttle hole and travels toward the evaporator.

A double pipe forms an inner flow path, through which a low-pressure side refrigerant flows, inside an inner pipe, and forms an inner-outer flow path, through which a high-pressure side refrigerant flows, between the outer pipe and the inner pipe. It comprises an expansion valve side connector and a counter-expansion valve side connector which are interposed between distal ends of the outer pipe and the inner pipe and members to be connected. An outer diameter of the outer pipe is 30 millimeters or less. A ratio of a difference between an inner diameter of the outer pipe and an outer diameter of the inner pipe with respect to the inner diameter of the outer pipe is 25% or less. A sealing member is provided to prevent a refrigerant leakage. The plurality of members are mechanically fixed.