# US 11,898,786 B2 · Engineless transport refrigeration unit

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- Number: US 11,898,786 B2
- Document ID: US11898786B2
- Status: Granted
- Kind: B2
- Application number: 17/032,410
- Filed: 2020-09-25
- Published: 2021-01-14
- Granted: 2024-02-13
- Earliest claimed: 2016-04-05
- Assignees: Carrier Corporation
- Applicants: Carrier Corporation
- Inventors: Robert A Chopko; Yu H. Chen; Greg Deldicque
- Web page: https://patentgrep.com/patent/US11898786B2

## CPC

- F25D 11/003: {Transport containers}
- B60H 1/3222: {characterised by the compressor driving arrangements, e.g. clutches, transmissions or multiple drives (B60H1/3208, B60H1/3226 take precedence)}
- B60H 1/3232: {particularly adapted for load transporting vehicles (B60H1/3226 takes precedence)}
- F25B 27/00: Machines, plants or systems, using particular sources of energy (F25B30/06 takes precedence)
- F25D 19/003: {with respect to movable containers}
- F25D 19/04: with more than one refrigeration unit
- F25D 29/003: {for movable devices}
- F25D: REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR (refrigerated showcases A47F3/04; thermally-insulated vessels for domestic use A47J41/00; refrigerated vehicles, see the appropriate subclasses of classes B60 - B64; containers with thermal insulation in general B65D81/38; heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants, or materials for the production of heat or cold by chemical reactions other than by combustion C09K5/00; thermally-insulated vessels for liquefied or solidified gases F17C; air-conditioning or air-humidification F24F; refrigeration machines, plants, or systems F25B; cooling of instruments or comparable apparatus without refrigeration G12B)
- B60H: ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- F25B: REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS

## Abstract

An engineless transport refrigeration unit includes a direct current compressor motor, condenser fan motor, evaporator fan motor, an energy storage device, and a generator. The energy storage device is configured to provide direct current electric power to the compressor motor the condenser fan motor, and the evaporator fan motor. The energy storage device is configured to provide power within a range of two hundred volts to six hundred volts. The compressor motor is configured to operate at a direct current voltage range of two hundred to six hundred volts.

## Claims

### Claim 1

A tractor trailer system including a self-propelled tractor including a combustion engine and a generator driven by the combustion engine, including a transport container adapted to be connected and towed by the self-propelled tractor, and the tractor trailer system further comprising:
an engineless transport refrigeration unit mounted on the transport container, the engineless transport refrigeration unit comprising a compressor constructed and arranged to compress a refrigerant, a direct current compressor motor configured to drive the compressor, a condenser heat exchanger operatively coupled to the compressor, a condenser fan configured to provide air flow over the condenser heat exchanger, a condenser fan motor for driving the condenser fan, an evaporator heat exchanger operatively coupled to the compressor, an evaporator fan configured to provide air flow over the evaporator heat exchanger, an evaporator fan motor for driving the evaporator fan, and an energy storage device configured to provide direct current electric power to the compressor motor, condenser and evaporator fan motors, and wherein the energy storage device is configured to provide power within a range of two hundred volts to six hundred volts and to be recharged by the generator, and wherein the compressor motor is configured to operate at a direct current voltage range of two hundred to six hundred volts.

### Claim 2 (depends on 1)

The tractor trailer system set forth in claim 1, wherein the refrigerant is a natural refrigerant having a GWP of about one.

### Claim 3 (depends on 1)

The tractor trailer system set forth in claim 1, wherein the energy storage device is a battery.

### Claim 4 (depends on 1)

The tractor trailer system set forth in claim 1, wherein the electric condenser fan motor is a direct current condenser fan motor.

### Claim 5 (depends on 1)

The tractor trailer system set forth in claim 1, wherein the electric evaporator fan motor is a direct current evaporator fan motor.

### Claim 6 (depends on 3)

The tractor trailer system set forth in claim 3, wherein the engineless transport refrigeration unit includes a renewable source of power configured to recharge the battery.

### Claim 7 (depends on 6)

The tractor trailer system set forth in claim 6, wherein the renewable source of power is a solar panel.

### Claim 8 (depends on 6)

The tractor trailer system set forth in claim 6, wherein the renewable source of power is regenerative braking.