HVAC apparatus for a vehicle
A heating, ventilation, and air conditioning (HVAC) apparatus for a vehicle includes a housing defining an inlet, an outlet, an airflow path between the inlet and the outlet, a heat exchanger disposed along the airflow path for selectively heating and cooling air in the airflow path, a passage between the inlet and the outlet and dividing the airflow path into a first path through the heat exchanger and a second path through the passage bypassing the heat exchanger, and a bypass door selectively covering the passage to control airflow through the first and second paths.
1 . A heating, ventilation, and air conditioning (HVAC) apparatus for a vehicle, comprising:
a housing defining an inlet, an outlet, and an airflow path between the inlet and the outlet;
a heat exchanger disposed along the airflow path for selectively heating and cooling air in the airflow path, wherein the heat exchanger is the only heat exchanger of the HVAC apparatus, and wherein the heat exchanger contains thermal fluid having an operating temperature at least partially determined by user input;
a passage between the inlet and the outlet and dividing the airflow path into a first path through the heat exchanger and a second path through the passage bypassing the heat exchanger;
a bypass door selectively covering the passage to control airflow through the first and second paths;
a first temperature sensor configured to sense a temperature of air in the outlet; and
a restriction plate extending across the passage and configured to reduce airflow through the second path.
2 . The HVAC apparatus of claim 1 , wherein the restriction plate includes a baffle.
3 . The HVAC apparatus of claim 1 , wherein the housing defines a second outlet, and further comprising:
a second passage between the inlet and the second outlet and dividing the airflow path into a third path through the second passage bypassing the heat exchanger; and
a second bypass door selectively covering the second passage to control airflow through the third path.
4 . The HVAC apparatus of claim 1 , further comprising:
a divider downstream of the heat exchanger and dividing the first path into a plurality of outlet paths each extending to a corresponding plurality of outlets.
5 . A heating, ventilation, and air conditioning (HVAC) apparatus for a vehicle, comprising:
a housing defining an inlet, an outlet, and an airflow path between the inlet and the outlet;
a heat exchanger disposed along the airflow path for selectively heating and cooling air in the airflow path via a thermal fluid having an operating temperature at least partially determined by user input, wherein the heat exchanger is the only heat exchanger of the HVAC apparatus;
a passage between the inlet and the outlet and dividing the airflow path into a first path through the heat exchanger and a second path through the passage bypassing the heat exchanger;
a bypass door selectively covering the passage to control airflow through the first and second paths;
an actuator configured to move the bypass door in response to a control signal; and
a restriction plate extending across the passage and configured to reduce airflow through the second path.
6 . The HVAC apparatus of claim 5 , wherein the restriction plate includes a baffle.
7 . The HVAC apparatus of claim 5 , further comprising:
a temperature sensor configured to sense a temperature of air in the outlet.
8 . A heating, ventilation, and air conditioning (HVAC) apparatus for a vehicle, comprising:
a housing defining an inlet, a first outlet, a second outlet, and an airflow path between the inlet and each of the first and second outlets;
a heat exchanger disposed along the airflow path for selectively heating and cooling air in the airflow path;
a first passage between the inlet and the first outlet and dividing the airflow path into a first path through the heat exchanger and a second path through the first passage bypassing the heat exchanger;
a first bypass door selectively covering the passage to control airflow through the first and second paths;
a second passage between the inlet and the second outlet and dividing the airflow path into a third path through the second passage bypassing the heat exchanger; and
a second bypass door selectively covering the second passage to control airflow through the third path.
9 . The HVAC apparatus of claim 8 , wherein the controller is configured to receive a target temperature set by a user and control a degree of opening for at least one of the first bypass door and the second bypass door in response to the target temperature.