A refrigerant/heat medium heat exchanger that heats a heat medium which circulates in a heater core of an HVAC unit is provided in a discharge pipe of a cooling refrigerant circuit, a heating bypass circuit that extends to a receiver is connected to a downstream side of the refrigerant/heat medium heat exchanger through a switching means, a second circuit having a second decompression means is provided between an outlet of the receiver and a first end of a vehicle exterior heat exchanger, and a third circuit having a solenoid valve is provided between a second end of the vehicle exterior heat exchanger and an intake circuit. In a vehicle air-conditioning system, a heating refrigerant circuit is configured by an electric compressor, a refrigerant/heat medium heat exchanger, a switching means, a heating bypass circuit, a receiver, a second circuit, a vehicle exterior heat exchanger, and a third circuit. Consequently, while simplification of a configuration and the like are attained by diverting cooling refrigerant circuit and an HVAC of a current system, cooling/heating capacity can be ensured by diversifying heating heat sources, and operation in a frost formation delay mode or the like is possible during heating.

A vehicle air conditioner capable of making a determination that the dehumidification is unnecessary in a vehicle interior early to make a prompt transition from a dehumidifying mode to a heating mode and reduce power consumption is provided. A control device executes a heating mode to let a refrigerant discharged from a compressor 2 radiate heat in a radiator, decompress the refrigerant, and then let the refrigerant absorb heat in an outdoor heat exchanger 7, and a dehumidifying mode to let the refrigerant flow into the outdoor heat exchanger without flowing to the radiator to radiate heat therein, decompress the refrigerant, and then let the refrigerant absorb heat in a heat absorber 9 and let an auxiliary heater 23 generate heat. The control device shifts from the dehumidifying mode to the heating mode on the basis of the heat absorber suction air temperature Tevain being lowered more than a target heat absorber temperature TEO.

A refrigeration system includes a refrigeration circuit and a coolant circuit separate from the refrigeration circuit. The refrigerant circuit includes a gas cooler/condenser, a receiver, and an evaporator. The coolant circuit includes a heat exchanger configured to transfer heat from a refrigerant circulating within the refrigeration circuit into a coolant circulating within the coolant circuit, a heat sink configured to remove heat from the coolant circulating within the coolant circuit, and a magnetocaloric conditioning unit configured to transfer heat from the coolant within a first fluid conduit of the coolant circuit into the coolant within a second fluid conduit of the coolant circuit. The first fluid conduit connects an outlet of the heat exchanger to an inlet of the heat sink, whereas the second fluid conduit connects an outlet of the heat sink to an inlet of the heat exchanger.

Disclosed is a refrigeration system, which may include a generator, a condenser, an evaporator, and an absorber connected in sequence, the condenser being disposed above the evaporator, and the absorber being disposed below the evaporator; the evaporator includes an outer pipe, a hydrogen inlet pipe, and a liquid ammonia pipe; one end of the outer pipe is sealed and the other end thereof is connected to the absorber; the diameter of the end of the outer pipe connected to the absorber is gradually reduced facing a direction of the absorber; the hydrogen inlet pipe is hidden inside the outer pipe; an air outlet end of the hydrogen inlet pipe is disposed at the sealed end of the outer pipe.

A cooling device includes a circulation system configured to circulate a refrigerant in a condenser so as to return the refrigerant to the condenser via a pump, a heater, a throttle valve, and a vaporizer; and a cooling system that includes a heat exchanger arranged in the condenser. The condenser includes a first portion where the refrigerant is present in a liquid state and a second portion where the refrigerant is present in a gas state, and at least a portion of the heat exchanger is arranged in the second portion.

A method for cooling with a refrigerant based cooling system includes circulating a refrigerant in a main flow path of a refrigeration cycle including an accumulator, compressor, condenser and an evaporator, diverting a portion of flow to a bypass flow path from a location along the main flow path that is downstream the compressor and upstream the condenser and combining flow through the bypass flow path with flow through the main flow path downstream the condenser and upstream from the evaporator. The rate of flow through the bypass flow path may be dynamically controlled.

A heat management system which includes: a refrigerant circulation line which includes a compressor, a water cooling-type condenser, a first expansion valve, an air cooling-type condenser, a second expansion valve, and an evaporator, and cools the indoor space by circulating a refrigerant; a heating line which heats the indoor space by circulating cooling water which exchanges heat with the refrigerant through the water cooling-type condenser; a first cooling line which cools a battery by circulating cooling water which exchanges heat with air or the refrigerant; and a second cooling line which cools electric components including a driving motor, by circulating cooling water which exchanges heat with air or the refrigerant. The heat management system enables efficient heat management of electric components and a battery in a vehicle as well as cooling and heating of the vehicle.

An air-conditioning apparatus includes a refrigerant circuit in which a compressor, a refrigerant flow switching device, a heat source side heat exchanger, an expansion device, a heat medium heat exchanger, and an accumulator are connected, a heat medium circuit in which a pump, the heat medium heat exchanger, a heat medium flow control device, and a load side heat exchanger are connected, at least one or more bypass pipes provided in the refrigerant circuit so that the refrigerant discharged from the compressor bypasses at least either one of the heat source side heat exchanger and the heat medium heat exchanger, a bypass opening and closing device provided at the bypass pipe, and a controller configured to control the bypass opening and closing device to carry out a start-up control function of causing low-pressure gas refrigerant with a high degree of superheat to flow into the accumulator.

A temperature control device for controlling a temperature of a temperature adjustment target part is provided. A communication module of the temperature control device is configured to store target temperature information of each of the temperature adjustment target parts included in a communication frame periodically received via a field network in a predetermined position of a memory, and an arithmetic operation module of the temperature control device receives the target temperature information of each of the temperature adjustment target parts, receives refrigerant temperature information from each of temperature sensors corresponding to each of the temperature adjustment target parts, and calculates each of control parameter for adjusting an opening degree of each corresponding control valve so that each temperature of the temperature adjustment target parts becomes a target temperature indicated by the received target temperature information based on the received target temperature information and the received refrigerant temperature information.

A refrigeration system includes a heat exchanger configured to place a cooling fluid in a heat exchange relationship with a working fluid, a free-cooling circuit having a pump configured to circulate the working fluid through the heat exchanger and a condenser, a flow control valve configured to control a flow rate of the working fluid to the condenser, a condenser bypass valve configured to control a flow rate of the working fluid that bypasses the condenser, and a controller configured to adjust a position of the flow control valve, a position of the condenser bypass valve, a speed of a fan of the condenser, a speed of the pump, and a temperature of a heater based on an ambient temperature, a temperature of the working fluid leaving the condenser, the position of the flow control valve, the position of the condenser bypass valve, or a combination thereof.