Abstract: Refrigeration apparatus (1) having a closed circuit (C) in which a flow rate (P) of coolant circulates, said closed circuit comprising at least one main branch (M) provided with at least one main compressor (2), at least one cooling device (3) to cool said coolant, expansion means (4) to expand the coolant and at least one evaporator (5), said closed circuit further comprising at least one secondary economizer branch (100) for at least one fraction of flow rate (X1) of said coolant, wherein the inlet section (100a) of said at least one first secondary economizer branch (100) is arranged in a length (101) of said closed circuit (C) comprised between said cooling device (3) and said expansion means (4) and the outlet section (100b) of said at least one secondary economizer branch (100) is arranged in proximity of the suction of said main compressor (2), said main branch (M) further comprises at least one reciprocating compressor (6) arranged between said evaporator and said main compressor.

Abstract: A refrigeration cycle device, comprising: a compressor configured to compress a refrigerant; an outdoor air heat exchanger configured to exchange heat between the refrigerant and outside air located outside a target space; an indoor air heat exchanger configured to exchange heat between the refrigerant and inside air located inside the target space; a water heat exchanger configured to exchange heat between the refrigerant and water; a four-way valve located between an indoor port on the indoor air heat exchanger, an outdoor port on the outdoor air heat exchanger, an input port on the compressor, and an output port on the compressor; a bypass refrigerant line connecting the indoor port to the outdoor port; and a controllable valve located on the bypass refrigerant line, the controllable valve being configured to have an open state that passes the refrigerant and a closed state that prohibits passage of the refrigerant.

Abstract: Refrigeration cycle intercooler with dual coil evaporator is a component in a refrigeration cycle that is installed in a vehicle with an internal combustion engine or motor. The refrigeration cycle operates by continuously cycling a refrigerant through a closed loop where refrigerant passes through an inner coil evaporator and an outer coil evaporator where the refrigerant changes from liquid to gas, thereby providing a cooling effect. During operation, fresh air or outside air continuously passes by the inner coil evaporator and the outer coil evaporator and then continues into the internal combustion engine or motor air intake. The inner coil evaporator and the outer coil evaporator function to cool and dry the intake air for the internal combustion engine or motor. The inner coil evaporator and an outer coil evaporator are specially designed to provide substantially more cooling and drying than any other intercooler design.

Abstract: The present invention relates to a vehicle air conditioner and, more specifically, to a vehicle air conditioner which supplies, to a variable heat exchanger, condensate water and air, that have been blown by means of a supply part and passed through an evaporator, so as to enable sub-cooling and overall performance of the variable heat exchanger to be improved during cooling, thereby further increasing cooling performance, and which may use air and condensate water as a heat-absorbing heat source during heating so as to further increase the heat absorption amount of the variable heat exchanger, so that heating performance may be further increased, and thus overall power consumption for air conditioning may be reduced and an increase in heat pump system performance may be promoted.

Abstract: 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.

Abstract: A cooling system using carbon dioxide as a coolant comprises a cooling chamber for storing products to be cooled during transport and a cooling unit for cooling the atmosphere in the cooling chamber. The cooling chamber and the cooling unit are mounted on or integrated in a cooling vehicle like a truck, a railway wagon or a ship. The cooling unit comprises a carbon dioxide storage compartment and at least one cooling channel through which air is led from and to the cooling chamber. The carbon dioxide storage compartment and the cooling channel are separated from each other by a thermal well-conducting but gas-tight plate serving as a heat exchanger between the carbon dioxide in the carbon dioxide storage compartment and the air in the cooling channel.

Abstract: A method for controlling an air conditioning device of an electrified vehicle includes determining, by a controller, whether an active air flap is closed in response to an operation signal of the active air flap of the electrified vehicle, when an electric compressor provided in an air conditioner of the air conditioning device of the electrified vehicle is operated, when the active air flap is closed, controlling, by the controller, opening of an intake door provided in the air conditioning device to increase an amount of internal circulating air of the air conditioner, and when the amount of the internal circulating air of the air conditioner is increased, decreasing, by the controller, a speed of the electric compressor.

Abstract: An air conditioner for a vehicle includes: a case having an air passage; a heat exchanger having a core portion in which heat is exchanged between air and a heat medium; a support portion provided in the case to support a lower portion of the heat exchanger; and a cushioning material interposed between the lower portion of the heat exchanger and the support portion. The lower portion of the heat exchanger has a pipe side adjacent to an inflow pipe or an outflow pipe for the heat medium and an opposite-to-pipe side located on an opposite side of the pipe side. The support portion includes a pipe side support that supports the pipe side, and an opposite-to-pipe side support that supports the opposite-to-pipe side. A surface area of the opposite-to-pipe side support in contact with the cushioning material is larger than that of the pipe side support.

Abstract: An air conditioning control apparatus for a vehicle according to the present disclosure includes a sensor that senses a number of vehicle occupants, a vehicle speed, and an indoor temperature and an outdoor temperature of the vehicle, an air conditioner that adjusts an amount of air introduced from an outside or exhausted to the outside, and a controller that controls the air conditioner based on the number of vehicle occupants, the vehicle speed, and the indoor temperature and the outdoor temperature of the vehicle. According to the present embodiment, the comfort inside the vehicle may be improved by adjusting the ventilation amount depending on the number of vehicle occupants, the vehicle speed, and the indoor temperature and the outdoor temperature of the vehicle.

Abstract: A system and method for protecting against low refrigerant charge of a refrigerant subsystem in a vehicle includes a controller configured to control a component of the vehicle in response to detecting a low refrigerant charge based on an ambient temperature of the refrigerant subsystem, a suction pressure of refrigerant entering a compressor of the refrigerant subsystem, and a speed of the compressor.

Abstract: The method for controlling the refrigerator includes operating a first cooling cycle for cooling the first storage compartment to operate the compressor and operating a first fan for the first storage compartment, and switching the first cooling cycle to a second cooling cycle for cooling the second storage compartment to operate the compressor and operating a second fan when a stop condition of the first cooling cycle is satisfied. A temperature of each storage compartment is sensed at sampling time intervals in each cooling cycle. Further, a cooling power of the compressor is determined for each sampling time based on a sensed current temperature of the storage compartment, and the compressor is operated at the determined cooling power.

Abstract: A transport climate control system to cost-effectively maintain an ultra-low temperature over an extended period of time is provided. The transport climate control system includes a primary climate control system and a secondary climate control system. The primary climate control system includes a first compressor, a first condenser, a first expander, and a main evaporator that is configured to thermally communicate with a climate controlled space. The secondary climate control system includes an ultra-low temperature phase changing medium packaged inside or outside of an enclosure for a cargo. The secondary climate control system is configured to thermally communicate with the climate controlled space, the primary climate control system, and the cargo to provide additional or backup climate control capacity at the ultra-low temperature.

Abstract: A thermal management system for a vehicle includes a plurality of fluid flow circuits including a heating ventilation and air conditioning (HVAC) circuit circulating a flow of refrigerant therethrough and including an evaporator, a chiller heat exchanger, a first expansion valve located upstream of the evaporator, a second expansion valve located upstream of the chiller heat exchanger, and a heat exchanger located fluidly upstream of the expansion valves. A propulsion cooling circuit circulates a flow of coolant therethrough which is utilized to condition one or more propulsion components of the vehicle. The flow of coolant is directed through the heat exchanger, thus subcooling the flow of refrigerant. A controller is operably connected to one or more control points of the thermal management system and is configured to adjust the one or more control points to achieve a target amount of subcooling of the flow of refrigerant at the heat exchanger.

Abstract: Air conditioner units and methods of operating the same are provided. A method of operating an air conditioner unit includes determining a fan speed as a function of a compressor speed of a variable speed compressor of the air conditioner unit. The method also includes activating a variable speed fan of the air conditioner unit at the fan speed. An air conditioner unit may include a controller, and the controller may be configured for performing the method.

Abstract: To control the temperature of a fluid with high accuracy, a temperature control system is equipped with: a circulation channel including a temperature control target and a tank containing a fluid adjusted to a specified temperature range including a target temperature of the temperature control target; and a first temperature controller that is arranged between the tank and the temperature control target in the circulation channel and that adjusts the temperature of the fluid to be supplied to the temperature control target.

Abstract: A climate control circuit for a transport climate control system is provided. The circuit includes a compressor, a plurality of evaporators, a suction flow control device, and a controller. The suction flow control device is downstream of the plurality of evaporators and directs the working fluid from each of the evaporators to one of a main suction port and an auxiliary port of the compressor. The controller determines whether each of the evaporators is operating in a fresh temperature range or in a frozen temperature range. For each of the evaporators operating in the fresh temperature range, the controller instructs the suction flow control device to direct the working fluid from the corresponding evaporator to the auxiliary suction port. For each of the plurality of evaporators operating in the frozen temperature range, the controller instructs the suction flow control device to direct the working fluid to the main suction port.

Abstract: A heat exchanger for a motor vehicle that includes at least two flat tubes and at least two corrugated fins. The flat tubes and the corrugated fins are stacked alternately one above the other in a height direction (HR) to form a stack. The flat tubes and the corrugated fins are displaced in the stack in such a way that a central height axis (HMA) of the stack is aligned at an inclination angle (NVV) to the height direction (HR).

Abstract: A controller of an HVAC system monitors a suction-side property and a liquid-side property over a period of time. The controller determines whether the suction-side property has an increasing or decreasing trend over the period of time. The controller determines whether the liquid-side property has an increasing or decreasing trend. In response to determining that both the suction-side property and the liquid-side property have an increasing trend over the period of time, a fan fault is detected. In response to determining that the suction-side property has a decreasing trend and the liquid-side property has an increasing trend over the period of time, a blockage of a refrigerant conduit subsystem is detected. In response to determining that both the suction-side property and the liquid-side property have a decreasing trend over the period of time, a blower fault is detected.

Abstract: Disclosed is an air conditioner for a vehicle, the air conditioner having an improved guide structure capable of increasing an air volume by preventing a collision between air flowing through an upper passage and air flowing through a lower passage. The air conditioner for a vehicle comprises: an air conditioning case having an air passage formed therein and an air outlet which includes a defrost vent and a face vent; and a heat exchanger for cooling and a heat exchanger for heating, which are provided in the air passage of the air conditioning case.

Abstract: Disclosed is a method of operating a trailer refrigeration unit of a refrigerated trailer system comprising setting a cargo hold set point temperature through a user interface; urging an airflow along a flowpath from a return air inlet port, through an evaporator of the trailer refrigeration unit, and to a supply air outlet port of the trailer refrigeration unit; monitoring a return air temperature of the airflow flowing through the return air inlet port; monitoring a supply air temperature of the airflow flowing through the supply air outlet port; heating the airflow flowing through the supply air outlet port when the return air temperature is less than the cargo hold set point temperature; and stopping heating of the airflow flowing to the supply air outlet port when the return air temperature is less than the cargo hold set point temperature and the supply air temperature reaches a threshold.