Thermo King

A compressor is provided that includes a compressor housing (102) with a discharge chamber (104) and an intermediate-pressure chamber (106), first and second lubricant sumps (110,112), a suction inlet (114), a discharge outlet (118E), a compression mechanism (120), an intermediate injection port (124), a lubricant passage (150), and a lubricant sump valve (152). The first lubricant sump (110) is disposed in the discharge chamber (104). The second lubricant sump (112) is disposed in the intermediate-pressure chamber (106). The compression mechanism (120) suctions a working fluid from the suction inlet (114) and discharges the working fluid into the discharge chamber (118E). The intermediate injection port (124) is fluidly connected to the intermediate-pressure chamber (106). The lubricant supply passage (150) connects the discharge chamber (104) and the intermediate-pressure chamber (106). The lubricant sump valve (152) controls a flow of lubricant through the lubricant supply passage (150) from first lubricant sump (110) to the second lubricant sump (112). The lubricant in the second lubricant sump (112) is supplied to at least the compression mechanism (120).

A method is provided for preventing an arc-flash event while an electrically powered accessory disposed on a transport unit is connected to an electrical power source. The method includes obtaining movement data indicating whether the transport unit is moving, and obtaining electrical power data indicating whether the electrically powered accessory is receiving electrical power from the electrical power source. The method also includes determining that the transport unit is moving, and determining that the electrically powered accessory is connected to the electrical power source. Also, the method includes deenergizing a connection that supplies power from the electrical power source to one or more loads of the electrically powered accessory upon detecting both that the transport unit is moving and that the electrically powered accessory is connected to the electrical power source.

There is disclosed a power network for a transport climate control system, comprising: a DC bus configured to provide power from a plurality of power sources to a load, including one or more autonomous power sources; one or more autonomous control modules, each associated with a respective one of the autonomous power sources; and a primary control module configured to determine a resource demand value for the power network by monitoring power delivery to the load. The resource demand value varies as a quantitative variable, and each autonomous control module receives the resource demand value and determines whether to cause power delivery from the respective autonomous power source to the DC bus based on the resource demand value and a corresponding resource availability function associated with the respective power source

There is described a refrigeration system 10, the refrigeration system 10 comprising an induction motor 18 having a rotor 23, wherein the refrigeration system 10 is configured to: supply 102 an alternating current to the induction motor 18 to induce rotation of the rotor 23, wherein rotation of the rotor 23 powers one or more loads 20, 21 of the refrigeration system 10; identify 104 a predetermined threshold value R_t1 of a parameter R of the induction motor 18 and a predetermined relationship associated with the induction motor 18 between the parameter R and a derating amount P₁, the parameter R being an angular velocity or a slip of the rotor 23 of the induction motor 18; determine 106 the parameter R of the rotor 23 during rotation of the rotor 23; determine 108 whether the determined parameter R meets a first condition, the first condition being the angular velocity R being less than the predetermined threshold value R_t1 or the slip being greater than the predetermined threshold value R_t1; upon determining that the first condition has been met, determine 110 a derating amount P₁ based on the determined parameter R and the predetermined relationship; and derate 112 the one or more loads 20, 21 by the derating amount P₁. There is also described a method 100, 200, 300, 400, 500 of operating a refrigeration system.

Strip shape battery modules (200) are provided that can be positioned between cross beams (302) of a trailer (300), a cargo compartment (412) of a truck, etc. The strip shape battery modules can be connected so as to provide suitable power to a transport climate control system (800). The strip shape battery modules can be positioned at a ground clearance of 700 millimeters or more. The strip shape battery modules can be secured using skid plates (310) covering connections and locking the modules in place.

An embodiment of detecting a refrigerant leak in a climate control system includes (a) determining that the climate control system is in a deactivated and equalized state. In addition, the method includes (b) comparing an average pressure of a refrigerant of the climate control system to a saturated vapor pressure of the refrigerant at an average temperature within the climate control system, in response to (a). Further, the method includes (c) detecting a refrigerant leak based at least in part on (b).

The present disclosure relates to an electrical system 100 for a vehicle 10. The electrical system 100 comprises: a port 110 including a control pilot contact 8; and a controller 190 comprising a power terminal PT1 for receiving a supply voltage. The power terminal PT1 of the controller 190 is electrically coupled to the control pilot contact 8. The present disclosure also relates to a method 400 comprising causing 406 a ready signal to be transmitted to a charging station 100* from a vehicle 10, 100 via a control pilot contact 8 using electrical power drawn through the control pilot contact 8, the ready signal being for prompting the charging station 100* to supply electrical power to the vehicle 10, 100 through at least one power supply contact 6.

The present disclosure relates to an electrical system 100 comprising an active power converter 130, a filter 140, a DC power supply network 110 and a controller 139. The filter 140 has a cutoff frequency 322. The controller 139 is configured to control the active power converter 130 based on a control logic 200 having a corner frequency 324. The corner frequency 324 is equal to or greater than the cutoff frequency 322. The present disclosure further relates to a method 400 of tuning a control logic 200 of a controller 139 configured to control a power converter 130 coupled to a DC power supply network 110, the method 400 comprising adjusting 420 a gain of the control logic 200 to reduce voltage oscillations on the DC power supply network 110 below a cutoff frequency 322 of the filter 140.

A working fluid circuit includes a compressor (10), an oil sump (56), and an oil injection system. The compressor compresses working fluid into a compressed working fluid. The oil injection system has an oil pathway that is connected to the oil sump and to a suction pathway of the compressor. The oil pathway injects the oil from the oil sump into the suction pathway to cool the working fluid in the suction pathway. A method of controlling a working fluid circuit includes suctioning working fluid into a compressor, compressing the working fluid, and discharging the working fluid from the compressor. The method also includes separating oil from the working fluid and supplying and injecting, via an oil pathway, the oil into a suction pathway of the compressor. Gaseous refrigerant dissolved in the oil is liberated from the oil to provide cooling to the working fluid in the suction pathway.

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