Abstract: A manufacturing method for an air conditioner including the steps of: (a) assembling a refrigeration cycle by connecting an outdoor unit, which has a compressor containing a refrigerant and an outdoor heat exchanger to a dummy indoor unit, and a part including a moisture adsorbent, using connection piping; (b) operating the refrigeration cycle by either an intermittent heating operation or switching between cooling and heating operations to adsorb moisture contained in the refrigeration cycle using a moisture adsorbent; (c) disconnecting the part including the moisture adsorbent after adsorbing moisture from the refrigeration cycle, and (d) measuring the water content contained in the moisture adsorbent, to control the water contained in the outdoor unit.

Abstract: In a refrigeration cycle using a flammable refrigerant as a refrigerant and comprising an indoor heat exchanger, an outdoor heat exchanger, a compressor and an expansion device which are annularly connected to one another through pipes, the refrigeration cycle is provided with a gas sensor and a refrigerant discharge portion, the gas sensor monitors leakage of the refrigerant from the refrigeration cycle to outside, and after the leakage is detected by the gas sensor, the discharge portion is opened to discharge the refrigerant to outside. At that time, the gas sensor is disposed inside a room, and the discharge portion is disposed outside the room. Further, the discharge portion is provided with a fan to facilitate the dispersion of the refrigerant. Further, the discharge portion is provided with a burner portion to discharge out the refrigerant while burning the refrigerant.

Abstract: In a refrigerant leakage warning device for an apparatus having a refrigeration cycle using a flammable refrigerant as a refrigerant, when leakage of the refrigerant occurs, measures how to cope after the leakage of refrigerant occurs are indicated on an indoor unit. Therefore, the user can see the indication of the leakage and take the measures to cope with it, and it is possible to hold the damage at a minimum, and to enhance the safety.

Abstract: In an apparatus having a refrigeration cycle, the refrigeration cycle is formed by annularly connecting a compressor, a condenser, an expansion device and an evaporator with one another, the apparatus uses propane, isobutane or ethane as a refrigerant, and uses refrigerating machine oil having less mutual solubility with the refrigerant, and a dryer is provided in the refrigeration cycle for absorbing water. In stead of the dryer, an additive which reacts with water may be included in said refrigerating machine oil. With this arrangement, the amount of the refrigerant can be reduced, and the long term reliability of the apparatus can be obtained.

Abstract: A refrigeration cycle that controls the deposit of foreign matter at inlet or outlet of a capillary tube, which forms an expansion device in the refrigeration, regardless of changeover from a cooling operation to a heating operation. In particular, in a refrigeration cycle using an alternative refrigerant, a junction is provided for joining an end of a capillary tube forming an expansion device to the piping through which the refrigerant flows. The junction has a slope defined by the inside diameter thereof, which gradually decreases from the side of the junction that joins the piping to the side of the junction that joined the capillary tube. An end portion of the capillary tube projects into the junction at the piping side. The projecting end of the capillary tube is opened obliquely to the axial line of the capillary tube. A hole is formed in the peripheral wall of the projecting end of the capillary tube.

Abstract: A refrigeration cycle that controls the deposit of foreign matter at inlet or outlet of a capillary tube, which forms an expansion device in the refrigeration, regardless of changeover from a cooling operation to a heating operation. In particular, in a refrigeration cycle using an alternative refrigerant, a junction is provided for joining an end of a capillary tube forming an expansion device to the piping through which the refrigerant flows. The junction has a slope defined by the inside diameter thereof, which gradually decreases from the side of the junction that joins the piping to the side of the junction that joined the capillary tube. An end portion of the capillary tube projects into the junction at the piping side. The projecting end of the capillary tube is opened obliquely to the axial line of the capillary tube. A hole is formed in the peripheral wall of the projecting end of the capillary tube.

Abstract: A refrigerator controller employs a non-azeotropic mixture refrigerant and a compressor, a four-way valve, an outdoor hear exchanger, a fractionator, an overhead condenser provided on the top of the fractionator, a first flow control valve, a throttle, and an indoor heat exchanger which are connected in the form of a ring. The controller further employs a circuit at a lower part of the fractionator returning to the bottom of the fractionator through a second flow control valve and a reheater, and a circuit returning from the overhead condenser to the top of the fractionator, thereby controlling the openings of the first and second flow control valves by the output signal of indoor and outdoor heat exchanger temperature detectors, an indoor temperature detector, and an indoor temperature setting device through a flow controller. In this manner, a wider control range of refrigerating capability can be realized.