# US 2018/0022181 A1 · Vehicle auxiliary hvac system using a coolant loop for cooling a component and vehicle interior > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0022181 A1 - Document ID: US20180022181A1 - Status: Published application - Kind: A1 - Application number: 15/215,218 - Filed: 2016-07-20 - Published: 2018-01-25 - Earliest claimed: 2016-07-20 - Assignees: Ford Global Technologies, LLC - Applicants: Ford Global Technologies, LLC - Inventors: Robert Steven Sawyer; Manfred Koberstein - Web page: https://patentgrep.com/patent/US20180022181A1 ## CPC - B60H 1/00271: {HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit} - B60H 1/00278: {for the battery} - B60H 1/00328: {of the liquid-air type} - B60H 1/00564: {of air ducts} - B60H 1/00671: {Damper doors moved by rotation; Grilles} - B60H 2001/00092: {of air deflecting or air directing means inside the device} - B60H 2001/003: {Component temperature regulation using an air flow} - B60H 2001/00307: {Component temperature regulation using a liquid flow} - B60H 2001/00721: {Air deflecting or air directing means} - B60H: ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES ## Abstract A vehicle includes a heating, ventilation and air conditioning (HVAC) system for heating and cooling a passenger compartment. The HVAC system includes a refrigerant loop and a coolant loop, and an auxiliary heating, ventilation and air conditioning (HVAC) system. The auxiliary HVAC includes an expansion device coupled to the refrigerant loop for controlling a flow of refrigerant to a first heat exchanger, and a second heat exchanger coupled to an auxiliary coolant loop used to regulate a temperature of the component. The auxiliary HVAC further includes a blower for creating an air flow through the first heat exchanger, a first blend door for directing the air flow through the second heat exchanger and/or an outlet, a second blend door for directing the air flow through the outlet and/or a recirculation duct, and a third blend door for controlling the air flow through the recirculation duct. ## Claims ### Claim 1 A vehicle, comprising: a heating, ventilation and air conditioning (HVAC) system for heating and cooling a passenger compartment, said HVAC system including a refrigerant loop and a coolant loop; and an auxiliary heating, ventilation and air conditioning (HVAC) system including an expansion device coupled to said refrigerant loop for controlling a flow of refrigerant to a first heat exchanger, and a second heat exchanger coupled to an auxiliary coolant loop including a pump for moving a coolant within said auxiliary coolant loop near a component in order to regulate a temperature of said component. ### Claim 2 (depends on 1) The vehicle of claim 1, wherein said auxiliary HVAC system further includes a blower for creating an air flow through said auxiliary HVAC system, and wherein said first heat exchanger is a refrigerant to air heat exchanger and said second heat exchanger is an air to coolant heat exchanger. ### Claim 3 (depends on 1) The vehicle of claim 1, wherein said auxiliary HVAC system further includes a blower for creating an air flow through said auxiliary HVAC system and a first blend door, said first blend door positioned downstream of said first heat exchanger for directing the air flow at least partially through an outlet in a passenger compartment cooling mode. ### Claim 4 (depends on 1) The vehicle of claim 1, wherein said auxiliary HVAC system further includes a blower for creating an air flow through said auxiliary HVAC system and a first blend door, said first blend door positioned downstream of said first heat exchanger for directing the air flow at least partially through said second heat exchanger in a component cooling mode. ### Claim 5 (depends on 4) The vehicle of claim 4, wherein said auxiliary HVAC system further includes a recirculation duct through which the air flow directed at least partially through said second heat exchanger returns to said blower. ### Claim 6 (depends on 5) The vehicle of claim 5, wherein said auxiliary HVAC system further includes a second blend door, said second blend door positioned downstream of said first blend door for further directing the air flow directed at least partially through said second heat exchanger through said recirculation duct. ### Claim 7 (depends on 1) The vehicle of claim 1, wherein said auxiliary HVAC system further includes a blower for creating an air flow through said auxiliary HVAC system, a first blend door positioned downstream of said first heat exchanger for directing a first portion of the air flow through an outlet and into the passenger compartment and a second portion of the air flow through said second heat exchanger, and a second blend door and a third blend door both positioned downstream of said first blend door for further directing the second portion of the air flow through said outlet, through a recirculation duct back to said blower, or through said outlet and said recirculation duct back to said blower. ### Claim 8 An auxiliary heating, ventilation and air conditioning (HVAC) system for heating and cooling a passenger compartment and cooling a component via an auxiliary coolant loop, comprising: an expansion device for controlling a flow of refrigerant to a first heat exchanger; a second heat exchanger coupled to the auxiliary coolant loop for regulating a temperature of the component; a blower for creating an air flow through said first heat exchanger; a first blend door downstream of said first heat exchanger for directing the air flow through said second heat exchanger and/or an outlet into the passenger compartment; a second blend door downstream of said first blend door for directing the air flow through said outlet and/or a recirculation duct back to said blower; and a third blend door downstream of said first blend door for controlling the air flow through said recirculation duct. ### Claim 9 (depends on 8) The auxiliary heating, ventilation and air conditioning (HVAC) system of claim 8, wherein said component is one or more power storage devices, said first heat exchanger is a refrigerant to air heat exchanger, and said second heat exchanger is an air to coolant heat exchanger. ### Claim 10 (depends on 8) The auxiliary heating, ventilation and air conditioning (HVAC) system of claim 8, wherein said first blend door directs the air flow through said outlet in a passenger compartment cooling mode. ### Claim 11 (depends on 8) The auxiliary heating, ventilation and air conditioning (HVAC) system of claim 8, wherein said first blend door directs the air flow through said second heat exchanger in a component cooling mode. ### Claim 12 (depends on 11) The auxiliary heating, ventilation and air conditioning (HVAC) system of claim 11, wherein said second blend door directs the air flow through said third blend door and said recirculation duct in the component cooling mode. ### Claim 13 (depends on 8) The auxiliary heating, ventilation and air conditioning (HVAC) system of claim 8, wherein said first blend door directs a first portion of the air flow through said outlet and a second portion of said air flow through said second heat exchanger in a blended cooling mode. ### Claim 14 (depends on 13) The auxiliary heating, ventilation and air conditioning (HVAC) system of claim 13, wherein said second blend door directs the second portion of air flow through said second heat exchanger through said outlet. ### Claim 15 (depends on 13) The auxiliary heating, ventilation and air conditioning (HVAC) system of claim 13, wherein said third blend door directs at least a portion of the second portion of air flow through said second heat exchanger through said recirculation duct. ### Claim 16 A method of cooling a component in a vehicle having an auxiliary heating, ventilation and air conditioning (HVAC) system including an auxiliary coolant loop, comprising the steps of: creating an air flow through a first heat exchanger to lower a temperature of the air flow; directing at least a portion of the lowered temperature air flow through a second heat exchanger; pumping coolant through the auxiliary coolant loop to draw heat away from the component; and changing a temperature of the coolant within the auxiliary coolant loop utilizing the second heat exchanger. ### Claim 17 (depends on 16) The method of cooling a component in a vehicle having an auxiliary heating, ventilation and air conditioning (HVAC) system including an auxiliary coolant loop of claim 16, wherein the step of changing a temperature of the coolant includes controlling a flow of coolant through said second heat exchanger. ### Claim 18 (depends on 16) The method of cooling a component in a vehicle having an auxiliary heating, ventilation and air conditioning (HVAC) system including an auxiliary coolant loop of claim 16, wherein substantially all of the lowered temperature air flow is directed through said second heat exchanger in a component cooling mode. ### Claim 19 (depends on 18) The method of cooling a component in a vehicle having an auxiliary heating, ventilation and air conditioning (HVAC) system including an auxiliary coolant loop of claim 18, further comprising the step of recirculating the lowered temperature air flow directed through said second heat exchanger back to a blower. ### Claim 20 (depends on 16) The method of cooling a component in a vehicle having an auxiliary heating, ventilation and air conditioning (HVAC) system including an auxiliary coolant loop of claim 16, further comprising the steps of recirculating a first portion of the portion of the lowered temperature air flow directed through said second heat exchanger, and directing a second portion of the portion of the lowered temperature air flow directed through said second heat exchanger through an outlet into a passenger compartment in a blended cooling mode.