An air conditioning system for motor-vehicles includes a thermally controlled expansion valve unit for regulating the expansion of the fluid upstream of the evaporator, depending upon the temperature downstream of the evaporator. An intermediate heat exchanger provides a heat exchange between the conduit upstream of the evaporator and the conduit downstream of the evaporator. The expansion valve unit is arranged in such a way that its temperature sensor detects a temperature of the fluid along the conduit downstream of the evaporator at a portion of this conduit which is located downstream also with respect to the intermediate heat exchanger. A connecting flange is interposed between the evaporator and the thermally controlled expansion valve unit.

A method of forming a refrigeration heat exchanger comprising a suction line and a capillary line includes juxtaposing at least a portion of the suction and capillary lines to form a juxtaposed portion, at least partially enveloping the juxtaposed portion with a metal material, and encapsulating the capillary line to the suction line along at least a portion of the juxtaposed portion.

Systems, devices, and methods are presented that include an expansion valve having a pin operable to regulate a primary flow of refrigerant through a flow orifice. A flange is coupled to the pin and is configured to regulate a bleed flow of refrigerant through a bleed orifice. The flange moves cooperatively with the pin, thereby enabling the bleed flow of refrigerant to vary in coordination with the primary flow of refrigerant. When the pin occludes the flow orifice, the flange forms a predetermined gap that allows a non-zero bleed flow when the primary flow of refrigerant is substantially zero. The bleed flow of refrigerant therefore flows persistently through the expansion valve during operation. Other systems, tools and methods are presented.

A variable refrigerant volume system and control method thereof. The variable refrigerant volume system comprises: a compressor (1); a four-way valve (19); an indoor unit; a liquid tube (22), the first end thereof being connected to the indoor unit, the second end thereof being connected to the third valve port of the four-way valve (19), and a condenser (18) being provided on the liquid tube (22); a low pressure air pipe (23), the first end thereof being connected to the indoor unit, and the second end thereof being connected to the fourth valve port of the four-way valve (19); a refrigerant adjustment tank (6), the first port thereof being connected to the liquid tube (22), the second port thereof being connected to the low pressure air pipe (23), and the third port thereof optionally communicating with the liquid tube (22) or the low pressure air pipe (23). The refrigerant adjustment tank (6) provides refrigerant to the variable refrigerant volume system when the system requires more refrigerant, and recycles refrigerant from the variable refrigerant volume system when the system requires less refrigerant. The variable refrigerant volume system can flexibly control a refrigerant recycling amount in accordance with a refrigerant operation situation, thus ensuring system reliability.

A refrigeration cycle device includes at least a condenser, an expansion valve, an evaporator and a plurality of compressors, a sealed casing of each of the compressors is disposed with a rotary compression mechanism part in communication with a low-pressure path and a motor part configured to drive the compression mechanism part, the low-pressure path is in communication with the evaporator, each of the compressors is further provided with an oil storage cavity, and a gas discharge path of at least one compressor is connected with the sealed casing of another compressor.

A system includes a high side heat exchanger, a flash tank, a vessel, a load, and a compressor. The high side heat exchanger removes heat from a refrigerant. The flash tank stores the refrigerant from the high side heat exchanger. The vessel includes a chamber defined by an exterior housing and a tube positioned within the chamber. Heat is removed from the liquid refrigerant circulating through this tube and coming from the flash tank. The load uses the refrigerant from the tube to remove heat from a space proximate the load. The load sends the refrigerant into the chamber between the exterior housing and the tube. The compressor receives the refrigerant from the chamber between the exterior housing and the tube and compresses the refrigerant.

An expansion valve includes: a body having an insertion hole in a partition separating a first passage from a second passage; a power element configured to generate a drive force for opening or closing a valve section; a shaft extending through the insertion hole and configured to transmit the drive force to a valve element; a vibration-proof spring coaxially supporting the shaft and biasing the shaft radially inward to apply a sliding resistance thereto; and a flexible O-ring supported by one of an inner surface of the support part defining the insertion hole and an outer surface of the shaft and being in close contact with the other thereof. The O-ring, sliding portions of the shaft and the support part, and the vibration-proof spring are arranged in this order from a first passage side toward a second passage side in an axial direction of the shaft.

A distributor includes a main body. The main body includes a refrigerant inflow path, a plurality of refrigerant outflow paths, a distribution path communicating with the refrigerant inflow path and the plurality of refrigerant outflow paths, and a plurality of tapered paths each communicating between corresponding one of the plurality of refrigerant outflow paths and the distribution path. The tapered paths each have an inlet opening and an outlet opening, the inlet opening being larger than the outlet opening.

A drive control method for an electric expansion valve is disclosed. In the disclosure, before applying a drive pulse signal corresponding to a rotary pulse number to a motor of the electronic expansion valve, a secondary positioning is performed on a relative position between stator magnetic field of the motor and rotor magnetic field of the motor by applying a holding current of a first duration time to the motor, applying an pulse signal of an additional pulse number to the motor, and applying a holding current of a second duration time to the motor, and a same secondary positioning operation is also performed on the motor after applying the drive pulse signal corresponding to the rotary pulse number to the motor of the electronic expansion valve, which ensures that the electronic expansion valve operates according to the drive pulse signal corresponding to the rotary pulse number.

A bottom-freezer refrigerator has an ice making compartment formed in a door thereof. Cold air formed in independent spaces of the refrigerating compartment is individually guided to the ice making compartment and the refrigerating compartment, thereby reducing power consumption and noise to be caused as the length of a fluid passage is increased. Foods are refrigerated or frozen and stored in a clean state. The foods in the refrigerating compartment are freshly stored in a high moisture state, and the door is prevented from being forcibly open.