Thermo King Patente

The present disclosure relates to a method 300 of operating an electrical apparatus 200 comprising a rotary electric machine 230 and a power converter 220 electrically coupled to the rotary electric machine 230. The rotary electric machine 230 includes a rotor 234 and a stator 232. The method 300 comprises controlling the power converter 220 based on: determined components of a future stator magnetic flux space vector; an estimated future rotor electric current space vector and/or an estimated future magnetizing current space vector; and/or a combination of a change in a stored electrical energy of a DC link 210 to which the rotary electric machine 230 is coupled and a change in a stored electrical energy of the rotary electric machine 230.

There is provided an active controlled atmosphere (CA) system for a transport container. The transport container includes a cargo storage space. The CA system comprises: a gas concentration sensor, a nitrogen source including an outlet configured for the introduction of nitrogen-containing gas into the cargo storage space, a fan operable to circulate the gas around the cargo storage space, and a controller. The controller is configured to operate the CA system in each of a first mode and a second mode, wherein, in both the first mode and the second mode the nitrogen source is operated to introduce nitrogen-containing gas through the outlet, and wherein, in the first mode, the fan is deactivated and, in the second mode, the fan is activated. The gas concentration sensor is positioned so that: in the first mode, nitrogen-containing gas that has been introduced through the outlet passes over the sensor so that the sensor provides a signal indicative of a concentration of a first gas introduced through the outlet; and, in the second mode, nitrogen-containing gas that has been introduced through the outlet is displaced away from the sensor by the fan so that the sensor is configured to provide a signal indicative of the concentration of the first gas in an ambient environment of the cargo storage space.

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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There is disclosed a transport refrigeration unit (100) comprising an enclosed cargo space (102), an outer refrigeration cycle (110) configured to transfer heat from the cargo space exteriorly of the cargo space, to cool the cargo space; a container (200) installed within the cargo space; and an inner refrigeration cycle (210) configured to transfer heat from an interior (202) of the container, to cool the interior of the container. There is also disclosed a portable refrigeration device for use in such nested cooling arrangements, methods of adapting a transport refrigeration unit and/or portable refrigeration device for such use, a refrigeration module for such use, and an associated method of operating a transport refrigeration unit.

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A method for predicting an impending climate control failure for a transport temperature control system (TCCS) is provided. The method includes a backend obtaining one or more operational parameters and/or one or more control parameters of transport temperature control systems including the TCCS. The method also includes obtaining warrantee data and/or service records for the transport temperature control systems. The method further includes training a machine learning model with the warrantee data and/or service records for the transport temperature control systems, and at least one of the operational parameters of the transport temperature control systems or the control parameters of the transport temperature control systems. Also the method includes deploying the trained machine learning model. The method further includes predicting the impending climate control failure for the TCCS based on the trained machine learning model, operational parameters of the TCCS, and/or control parameters of the TCCS.

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There is disclosed a refrigerant circuit 30 comprising, in flow order along a main refrigerant path: a compressor 10; a condenser 12 configured to transfer heat from a refrigerant side to a secondary fluid side; a main expansion valve 17; and an evaporator 19, the refrigerant circuit further comprising: a thermal expansion valve 32 disposed downstream of the condenser and upstream of the main expansion valve. The thermal expansion valve is configured to regulate refrigerant flow responsive to variation of a condenser approach temperature. The thermal expansion valve comprises a remote sensing bulb 33 mounted to the condenser for thermal communication with the secondary fluid side of the condenser.

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