Patent ID: 9522589
Filing Date: 2016-12-20
CPC Classification: B60H,F25B

Claim Text:
1. A method of controlling a vehicular heat pump system having multiple heat exchangers within an HVAC module, the vehicular heat pump system including a connection line directly interconnecting a compressor and an outside heat exchanger, the method comprising: selecting a mode in which the vehicular heat pump system will operate, based on at least one control parameter; controlling the direction of refrigerant flow in a refrigeration circuit of the vehicular heat pump system, based on the mode of operation, wherein the mode of operation is a cooling mode when the at least one control parameter is within a first range of temperatures, and the mode of operation is a heating mode when the at least one control parameter is within a second range of temperatures; adjusting a first isolation valve and a second isolation valve of the vehicular heat pump system to isolate one of a first inside heat exchanger and a second inside heat exchanger of the vehicular heat pump system from the refrigeration circuit, based on the mode of operation while still allowing refrigerant flow through the outside heat exchanger disposed along the refrigeration circuit regardless of the mode of operation; adjusting a first metering device and a second metering device of the vehicular heat pump system to isolate one of the first inside heat exchanger and the second inside heat exchanger from the refrigeration circuit, and to control expansion of the refrigerant, based on the mode of operation while still allowing refrigerant flow through the outside heat exchanger regardless of the mode of operation; and wherein the first inside heat exchanger and the second inside heat exchanger are located within the HVAC module, and are configured to selectively operate both in parallel and in series; and wherein controlling the direction of refrigerant flow in the refrigeration circuit of the vehicular heat pump system, based on the mode of operation, includes: