A heat pump system for a vehicle may include a cooling apparatus including a radiator, a first water pump, a first valve, and a reservoir tank which are connected through a coolant line, and configured to circulate a coolant in the coolant line to cool at least one electrical component provided in the coolant line; a battery cooling apparatus configured to include a battery coolant line connected to the reservoir tank through a second valve, and a second water pump and a battery module which are connected through the battery coolant line to circulate the coolant in the battery module; and a heating apparatus including a heating line connected to the coolant line through a third valve to heat a vehicle interior by use of a coolant and a third water pump provided on the heating line, and a heater.

A method for notifying and mitigating a suboptimal event occurring in a transport climate control system that provides climate control to a climate controlled space of a transport unit is provided. The method includes monitoring an amount of power available for powering the transport climate control system, monitoring a power demand from the transport climate control system, and accessing operational data of the transport climate control system and the transport unit. The method also includes a controller determining whether a suboptimal event is detected based on one or more of the monitored amount of power available, the monitored power demand and the accessed operational data. Also, the method includes the controller generating a notification when a suboptimal event is detected, and the controller instructing the generated notification to be displayed on a display.

An air conditioner includes an air conditioning unit installed in a cabin, and a supply unit supplying air conditioned by the air conditioning unit to the cabin. The air conditioning unit includes a refrigeration cycle device having a compressor, a radiator, a decompression device, and an evaporator. One of the radiator and the evaporator functions as a use-side heat exchanger that generates conditioned air by heat exchange between refrigerant and air. The refrigeration cycle device has a high-pressure protection device that discharges the refrigerant to the outside when the pressure of the refrigerant flowing through a passage, which is defined from a refrigerant discharge side of the compressor to a refrigerant inlet side of the decompression device, exceeds a predetermined reference pressure. The high-pressure protection device is configured to discharge the refrigerant to the outside through an outside communication portion communicated with the outside of the cabin.

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.

A system comprising a refrigeration engine (132) and regulator (250, 350, 450, 550, 650) positioned within a housing (144, 244), the regulator (250, 350, 450, 550, 650) controlling fuel to the engine through a fuel line (354), a lock-off valve connected to the regulator (250, 350, 450, 550, 650) to shut off fuel supply through the regulator (250, 350, 450, 550, 650), a controller operably connected to the lock-off valve and/or the regulator (250, 350, 450, 550, 650), a guide (462, 562) positioned within the housing (144, 244) and proximate to the refrigeration engine (132), the regulator (250, 350, 450, 550, 650), and/or the fuel line (354) to direct gases leaking from the refrigeration engine (132), regulator (250, 350, 450, 550, 650), and/or at least one fuel line (354), and a methane sensor (566, 666A) positioned within the guide (462, 562) to detect the presence of methane within the guide (462, 562) that is directed by the guide (462, 562), the methane sensor (566, 666A) in communication with the controller and configured to transmit a signal to the controller when methane is detected by the methane sensor (566, 666A). The controller performs a safety action when the signal from the methane sensor (566, 666A) is received.

A transport refrigeration system having: a first engine (26) configured to power a refrigeration unit (22); a first fuel tank (330) fluidly connected to the first engine through a first fuel line (332); a first shut off valve (450) located within the first fuel line proximate the first fuel tank; a second shut off valve (72) located within the first fuel line proximate the first engine; a sensor system (80) configured to detect at least one of a crash of the transport refrigeration system, a fuel leak in the first fuel line, and an engine stall in the first engine; and a controller (30) configured to close the first shutoff valve and the second shutoff valve when the sensor system detects at least one of a crash of the transport refrigeration system, a fuel leak in the first fuel line, and an engine stall in the first engine.

A method of mitigating refrigerant leaks within a refrigeration system that includes: detecting a leak of a refrigerant from a refrigeration system; closing a first valve to inhibit a fluid flow of the refrigerant between an evaporator and a condenser fluidly connected to the evaporator; and operating a compressor to direct another fluid flow of the refrigerant from the evaporator to the compressor.

A vehicle air conditioning system sets a deterioration determination index, which is an index for determining the degree of deterioration of an electric motor, to an integrated value of the time for which a condition continues in which the temperature of the engine cooling water for cooling an internal combustion engine is at or above a preset set temperature, or to the number of times that the temperature of the engine cooling water is at or above the set temperature, and estimates the degree of deterioration of the electric motor on the basis of a total engine speed, which is the cumulative value of the engine speed, and on the deterioration determination index.

A leak detection system includes a sensor assembly (30) having a sensor housing (32), a leak sensor (60), and a 36 collection housing (34). The sensor housing (32) defines a first fluid inlet (40). The leak sensor (60) is disposed within the sensor housing (32). The leak sensor (60) is arranged to provide a signal indicative of a presence of the first fluid within an interior space of the transport refrigeration unit. The collection housing (34) is spaced apart from the sensor housing (32) and defines a second fluid inlet (80).

A vehicle-mounted cooling system includes an air-conditioning refrigerant circuit including a refrigerant passage, a compressor, a heat source-side heat exchanger and a use-side heat exchanger, a battery, and a battery cooling unit cooling the battery using the refrigerant. A control device controls a drive state of the compressor in response to an air-conditioning request and a battery cooling request. The control device includes an abnormality determination unit configured to determine whether an abnormality has occurred in the air-conditioning refrigerant circuit, and a control mode change unit configured to perform, under a situation where the battery cooling request has occurred and it is determined that an abnormality has occurred in the air-conditioning refrigerant circuit, a change of a refrigerant-circulation control mode while permitting the battery cooling unit to continuously cool the battery based on the refrigerant, the refrigerant-circulation control mode representing how the refrigerant is circulated in the air-conditioning refrigerant circuit.