Abstract: Provided is a low temperature display case, which comprises: a duct that is so formed that it communicates with a rear and a lower portion of a storage chamber having an opening at the front, an evaporator that is provided upright in a duct at a rear location, a blower for discharging, from an upper edge of the opening of the storage chamber, air that is cooled at the evaporator by heat exchange, a drain pan that is located at a bottom level of the duct and that is inclined downward toward a drain hole, defrosting heaters that are provided in a lower portion of the duct and that are located forward of a position under the evaporator, and a sharply sloped portion that is provided on the drain pan below the evaporator and that is inclined at a greater angle toward the drain hole than is the drain pan; wherein to defrost the evaporator a refrigerant at a high temperature is fed into the evaporator, and heat is generated by the defrosting heaters.

Abstract: The object of the present invention is to provide a defrosting device, for a low temperature display case, that can effectively prevent incomplete defrosting, and that can reduce the temperature increase in a storage chamber during defrosting to the minimum.According to the present invention, a defrosting device comprises: defrosting heaters provided in a duct; a first defrost recovery temperature sensor for detecting an air temperature in the duct; a second defrost recovery temperature sensor for detecting a temperature at the evaporator; and a controller for, during a defrosting operation for the evaporator, rendering the defrosting heaters conductive, supplying a high temperature refrigerant to the evaporator, and for rendering the defrosting heaters nonconductive, based on an output of the first defrost recovery temperature sensor, and halting a flow of the high temperature refrigerant to the evaporator, based on an output of the second defrost recovery temperature sensor.

Abstract: A refrigerating apparatus capable of reducing the start noise of the compressor comprises a compressor 1, a condenser 2, a capillary tube 4, and an evaporator 6, serially connected by piping to form a closed loop. The apparatus further comprises a solenoid valve 3 installed between the outlet of the condenser 2 and the capillary tube 4 and a control unit C controlling the compressor 1 and the solenoid valve 3. The control unit opens and closes the solenoid valve 3 in response to the operation and stop of the compressor 1 and in particular closes the solenoid valve 3 before the compressor 1 stops.

Abstract: A multi-passage tube coupling for coupling a plurality of parallel or concentric tubes or tube passages of a multi-passage tube for supplying a fluid to actuators. The coupling comprises a body and a coupling member, the body having as many passages or holes as the number of the tubes or tube passages of the multi-passage tube. At least one of the tubes or tube passages is coupled to the corresponding actuator through a passage defined in the coupling member.

Abstract: A multi-passage tube coupling for coupling a plurality of parallel or concentric tubes or tube passages of a multi-passage tube for supplying a fluid to actuators. The coupling comprises a body and a coupling member, the body having as many passages or holes as the number of the tubes or tube passages of the multi-passage tube. At least one of the tubes or tube passages is coupled to the corresponding actuator through a passage defined in the coupling member.

Abstract: An automatic on-off valve for use with a pneumatic micrometer connected between the main body of a pneumatic micrometer and its measuring head for economizing the consumption of pressurized air includes a valve body having, between an inlet and an exit thereof, a main flow passage to be opened and closed by a valve member and a sub-flow passage always open with a slight gap. The valve member is automatically turned on or off by the back pressure difference at the measuring head between a measuring state and a not-measuring state. The total open cross sectional area for both of the flow passages are set to be 6 to 9 times as large as the cross sectional area for a flow passage which is formed between a nozzle of the measuring head and an object to be measured upon the object being placed to measure the maximum gap, whereby a measuring error resulting from the disposition of the automatic on-off valve can be minimized within an allowable range to thereby maintain the measuring accuracy a desired high level.