A refrigerator having an improved structure that enhances the cooling efficiency. The refrigerator includes a main body, a storage compartment formed inside the main body, and a cold air supplier to supply cold air to the storage compartment, the cold air supplier including a compressor compressing a refrigerant, a condenser condensing the compressed refrigerant, a decompressor expanding the condensed refrigerant, an evaporator disposed at a rear of the storage compartment to evaporate the expanded refrigerant, and a refrigerant moving tube connecting the evaporator to the compressor through which the evaporated refrigerant is moved to the compressor so that the refrigerant is recirculated, wherein the evaporator includes a case, a refrigerant tube disposed inside the case such that the refrigerant introduced into the evaporator flows therethrough, and connected to the refrigerant moving tube at an inside of the case, and a heat insulating material filling the inside of the case to cover where the refrigerant tube and the refrigerant moving tube are connected to each other.

A temperature homogenizing container and a refrigerator having same. The container comprises a body and an accommodating space that is enclosed by the body. The body comprises several capillary tube cavities provided therein and allowing flow of a heat exchange medium. A micro-tooth structure is provided on the inner wall of each capillary tube cavity. The heat exchange medium may flow in the capillary tube cavities along an extension direction of the capillary tube cavities. By setting the container body to comprise several capillary tube cavities therein, the temperature homogenizing effect and heat exchange efficiency of the container are improved; by providing the micro-tooth structure, the heat exchange efficiency is further improved; the temperature difference of different areas in the container is reduced, and temperature homogenization in the container is achieved.

An exemplary heat pump (10) includes: a compressor (16A, 16B) that discharges refrigerant; an oil separator (30) that separates oil from the refrigerant discharged from the compressor; an oil return channel (80) that returns the oil separated by the oil separator to the compressor; a pressure sensor (86A, 86B) that detects a pressure in the oil return channel; a first pressure loss member (84A, 84B) and a second pressure loss member (88A, 88B) disposed in portions of the oil return channel at an oil separator side and a compressor side relative to the pressure sensor; and a control device that increases an output of the compressor in a case where a pressure detected by the pressure sensor exceeds a suction pressure of the compressor and less than a discharge pressure of the compressor.

A refrigerator appliance includes a sealed system with a first evaporator connected in series with a first capillary tube and a second evaporator connected in series with second and third capillary tubes such that the second evaporator is between the second and third capillary tubes. The first capillary tube is sized such that the chilled air at the first evaporator is a first temperature during operation of the sealed system. The second capillary tube is sized such that the chilled air at the second evaporator is a second, different temperature during operation of the sealed system.

A refrigeration apparatus includes: a refrigerant circuit that condenses a refrigerant discharged from a compressor, decompresses the refrigerant with a capillary tube, and causes the refrigerant to evaporate in an evaporator to exhibit a refrigeration effect, wherein, as the refrigerant in the refrigerant circuit, a mixed refrigerant containing a first refrigerant having a boiling point in an ultralow temperature range of not less than 89.0 C. and not more than 78.1 C. and carbon dioxide (R744) is enclosed, and a heater that heats at least a portion of a suction pipe through which the refrigerant that returns from the evaporator to the compressor passes is provided.

A refrigerator appliance includes an icemaker having a mold body that defines an ice cavity. The ice cavity is defined at least in part by a bottom wall positioned at a bottom portion of ice cavity and a back wall positioned at a rear portion of the ice cavity. First and second bottom wall segments are positioned and oriented such that an upper surface of the first bottom wall segment defines a first angle with a front surface of the back wall and such that an upper surface of the second bottom wall segment defines a second angle with the front surface of the back wall.

A bulb (5) for a thermostatic expansion valve is provided, said bulb (5) comprising a chamber (7), said chamber (7) being located within a metallic casing of said bulb and being filled with a filling adapted to influence a valve element of said thermostatic expansion valve. Service of a temperature controlled valve connected to a bulb should be facilitated. To this end said bulb (5) comprises a connection geometry (10) adapted to be connected to a capillary member (6) and said casing being provided with a closed opening zone located within said connection geometry (10), said opening zone being adapted to be opened upon mounting a counterpart (15) to said connection geometry (10).

A thermodynamic system for cooling or heating at least a first container containing food products of the liquid or semi-liquid type, including a circuit employing a heat exchanger fluid, having at least: a compressor having at least one inlet for the heat exchanger fluid and one outlet for the heat exchanger fluid; a first heat exchanger connected to the outlet of the compressor; at least one first expansion element connected to an outlet of the first heat exchanger; a second heat exchanger which can be associated with the first container and which has an inlet connected to an outlet of the at least one first expansion element; a return duct having an inlet portion connected to an outlet of the second heat exchanger and an outlet portion connected to the inlet of the compressor.

A Heating, Ventilation, and Air Conditioning (HVAC) system that is configured to receive a refrigerant from a condenser at a fixed expansion device and a variable expansion device. The system is further configured to output a first portion of the refrigerant to a first downstream HVAC component at a fixed flow rate using the fixed expansion device. The system is further configured to apply a first force to a pin of the variable expansion device based on a sensed temperature. The system is further configured to apply a second force to a valve of the variable expansion device via the force applied to the pin and to output a second portion of the refrigerant to a second downstream HVAC component at a variable flow rate based on the second force using the valve of the variable expansion device.

An HVAC system having a fixed orifice expansion device coupled to an evaporator coil is provided. In one embodiment, an expansion device coupled to an evaporator coil includes a flow restrictor and an evaporator inlet manifold. The flow restrictor includes multiple fixed orifices aligned with the refrigerant distribution tubes to restrict flow of refrigerant from the evaporator inlet manifold into the refrigerant distribution tubes through the multiple fixed orifices. Additional systems, devices, and methods are also disclosed.