Methods and systems for providing controlling environmental conditions in a passenger compartment of a vehicle are presented. In one example, various low cost expansion valves are included in a system that has a receiver positioned downstream of an exterior heat exchanger to provide a climate contro
Methods and systems for providing controlling environmental conditions in a passenger compartment of a vehicle are presented. In one example, various low cost expansion valves are included in a system that has a receiver positioned downstream of an exterior heat exchanger to provide a climate control system with heating, cooling, dehumidification, and de-icing modes.
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1. A vehicle system, comprising: a coolant loop including a heater core in a passenger compartment; anda refrigerant loop in thermal communication with the coolant loop via an intermediate heat exchanger and fluidically isolated from the coolant loop, the refrigerant loop including a passive fixed a
1. A vehicle system, comprising: a coolant loop including a heater core in a passenger compartment; anda refrigerant loop in thermal communication with the coolant loop via an intermediate heat exchanger and fluidically isolated from the coolant loop, the refrigerant loop including a passive fixed area expansion device which is disposed between, and directly coupled to, each of the intermediate heat exchanger and an exterior heat exchanger, the refrigerant loop further including an internal heat exchanger directly coupled to an interior heat exchanger. 2. The vehicle system of claim 1, where the refrigerant loop is part of a climate control system, and further comprising a controller including instructions to operate the climate control system in a heating mode, a cooling mode, a dehumidification mode, and a de-icing mode. 3. The vehicle system of claim 2, where the dehumidification mode includes cooling passenger compartment air and heating passenger compartment air via the climate control system. 4. The vehicle system of claim 1, further comprising a battery chiller loop, where the battery chiller loop includes a battery chiller pump, a battery chiller heat exchanger, and a battery. 5. The vehicle system of claim 1, further comprising a battery chiller thermal expansion valve positioned directly upstream of a battery chiller heat exchanger, wherein the battery chiller thermal expansion valve is positioned upstream of the battery chiller heat exchanger. 6. The vehicle system of claim 1, where the passive fixed area expansion device includes a shut-off valve that stops refrigerant flow through the passive fixed area expansion device. 7. The vehicle system of claim 1, further comprising a thermal expansion valve disposed between, and directly coupled to, each of the internal heat exchanger and the interior heat exchanger. 8. The vehicle system of claim 1, wherein the internal heat exchanger is configured to transfer thermal energy between refrigerant flowing through different regions of the refrigerant loop. 9. A vehicle system, comprising: a coolant loop including a heater core in a passenger compartment; anda refrigerant loop including a fixed area expansion device disposed between and directly coupled to each of an intermediate heat exchanger and an exterior heat exchanger, the refrigerant loop further including an internal heat exchanger directly coupled to an interior heat exchanger, and a receiver directly coupled to the exterior heat exchanger, wherein the refrigerant loop is in thermal communication with the coolant loop via the intermediate heat exchanger, and wherein the internal heat exchanger is configured to transfer thermal energy between refrigerant flowing through different regions of the refrigerant loop. 10. The vehicle system of claim 9, wherein the receiver is directly coupled to an outlet of the exterior heat exchanger, wherein the receiver is also directly coupled to the internal heat exchanger upstream of a first side of the internal heat exchanger, wherein the receiver is disposed between the exterior heat exchanger and the internal heat exchanger, and wherein a second side of the internal heat exchanger is positioned downstream of the interior heat exchanger in the refrigerant loop. 11. The vehicle system of claim 9, further comprising a battery chiller loop, where the battery chiller loop includes a battery chiller pump, a battery chiller heat exchanger, and a battery. 12. The vehicle system of claim 9, further comprising a battery chiller thermal expansion valve positioned upstream of a battery chiller heat exchanger. 13. The vehicle system of claim 9, where the fixed area expansion device includes a shut-off valve that stops refrigerant flow through the fixed area expansion device. 14. The vehicle system of claim 9, further comprising a thermal expansion valve disposed between, and directly coupled to, each of the internal heat exchanger and the interior heat exchanger. 15. A vehicle climate control method, comprising: receiving refrigerant at a receiver positioned directly downstream of an outlet of an exterior heat exchanger and directly upstream of an inlet of a first side of an internal heat exchanger in a refrigerant loop of a vehicle climate control system, wherein the refrigerant loop includes the exterior heat exchanger, an interior heat exchanger, and the internal heat exchanger, wherein an inlet of a second side of the internal heat exchanger is directly fluidically coupled to an outlet of the interior heat exchanger, wherein the internal heat exchanger is configured to transfer thermal energy between refrigerant flowing through different regions of the refrigerant loop, and wherein the refrigerant is received in a cooling mode, a heating mode, a de-icing mode, and a dehumidification mode. 16. The vehicle climate control method of claim 15, further comprising transitioning between the cooling mode and the heating mode via a procedure of first adjusting operating states of pumps in the vehicle climate control system. 17. The vehicle climate control method of claim 16, further comprising switching operating states of one or more valves in the vehicle climate control system after first adjusting the operating states of the pumps. 18. The vehicle climate control method of claim 17, further comprising ramping up compressor speed after switching the operating states of the one or more valves. 19. The vehicle climate control method of claim 18, further comprising adjusting an operating state of a coolant pump or a battery chiller pump after ramping up the compressor speed. 20. The vehicle climate control method of claim 15, where the vehicle climate control system further includes an intermediate heat exchanger positioned upstream of an inlet of the exterior heat exchanger and downstream of an outlet of the second side of the internal heat exchanger.
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