# US 2015/0147950 A1 · Air-conditioning system for a vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2015/0147950 A1 - Document ID: US20150147950A1 - Status: Published application - Kind: A1 - Application number: 14/553,330 - Filed: 2014-11-25 - Published: 2015-05-28 - Earliest claimed: 2013-11-28 - Assignees: MAHLE Behr France Rouffach SAS - Applicants: Mahle Behr France Rouffach SAS - Inventors: Henri Klein; Emmanuel Fleith - Web page: https://patentgrep.com/patent/US20150147950A1 ## CPC - B60H 1/24: Ventilating devices where the heating or cooling is irrelevant (nozzles or air-diffusers B60H1/34) - B60H 1/00485: {Valves for air-conditioning devices, e.g. thermostatic valves} - B60H 1/00685: {the door being a rotating disc or cylinder or part thereof (B60H1/00678 takes precedence)} - B60H 1/00849: {for selectively commanding the induction of outside or inside air (B60H1/00842 takes precedence)} - B60H: ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES ## Abstract An air-conditioning system for air-conditioning an interior of a vehicle may include a fan for driving air. The system may include a control device that may include a circulating air inlet for drawing in circulating air from the interior, a fresh air inlet for drawing in fresh air from an environment of the vehicle, and an air outlet. The control device may include a control valve adjustable between a circulating position and a fresh air position. The control valve may include at least one non-return check valve. The non-return check valve may permit a flow to pass through the control valve in one direction and block the flow in an opposite direction. ## Claims ### Claim 1 An air-conditioning system for air-conditioning an interior of a vehicle, comprising: a fan for driving air, a control device including a circulating air inlet for drawing in circulating air from the interior, a fresh air inlet for drawing in fresh air from an environment of the vehicle, and an air outlet for passing the drawn in at least one of circulating air and fresh air on to the fan, wherein the control device includes a control valve which is adjustable between a circulating air position, in which the control valve closes a fresh air path leading from the fresh air inlet to the air outlet and opens a circulating air path leading from the circulating air inlet to the air outlet, and a fresh air position, in which the control valve closes the circulating air path and opens the fresh air path, and wherein the control valve includes at least one non-return check valve, which in the fresh air position permits a circulating air flow in a through-flow direction from the circulating air inlet through the control valve to the air outlet and blocks the circulating air flow in an opposite direction. ### Claim 2 (depends on 1) The air-conditioning system according to claim 1, wherein the respective non-return check valve has a valve member, which is arranged at least one of adjustably and movably on the control valve and cooperates with a passage opening formed in the control valve, in order to open it the passage opening in the through-flow direction and to block the passage opening in the opposite direction. ### Claim 3 (depends on 2) The air-conditioning system according to claim 2, wherein the valve member is at least one of configured elastically at least in part and arranged on an inner side of the control valve facing the air outlet. ### Claim 4 (depends on 2) The air-conditioning system according to claim 2, wherein the valve member is configured and arranged so that on adjusting between a blocking position, in which the valve member blocks the passage opening, and an open position, in which the valve member opens the passage opening, it via deforming elastically, wherein the valve member is prestressed in the open position in a direction of the blocking position. ### Claim 5 (depends on 4) The air-conditioning system according to claim 4, wherein the valve member is configured and arranged so that the valve member is elastically deformed in the blocking position and is thereby prestressed into the blocking position. ### Claim 6 (depends on 2) The air-conditioning system according to one of claim 2, wherein the valve member is secured to the control valve in a stationary region, wherein the valve member includes an elastic mobile region at least one of movable and adjustable relative to the control valve. ### Claim 7 (depends on 1) The air-conditioning system according to claim 1, wherein the respective non-return check valve is at least one of pressure-controlled and pre-stressed into its closed position, so that in the fresh air position the non-return check valve only opens relative to the circulating air inlet starting from a predetermined negative pressure in the fresh air path. ### Claim 8 (depends on 1) The air-conditioning system according to one of claim 1, wherein the control valve is configured to be trough-shaped, wherein a concave inner side of the control valve faces the air outlet. ### Claim 9 (depends on 1) The air-conditioning system according to claim 1, wherein the control device includes a control housing, which includes the circulating air inlet, the fresh air inlet and the air outlet, wherein the control valve is swivellably arranged in the control housing about a swivel axis. ### Claim 10 (depends on 9) The air-conditioning system according to claim 9, wherein the control valve has sealing contours which, in the fresh air position and in the circulating air position, cooperate with counter sealing contours complementary thereto, which are formed disposed on the control housing. ### Claim 11 A control device for an air-conditioning system, comprising: a control valve, which is adjustable between a circulating air position, in which the control valve closes a fresh air path leading from a fresh air inlet to an air outlet, and opens a circulating air path leading from a circulating air inlet to the air outlet, and a fresh air position, in which the control valve closes the circulating air path and opens the fresh air path, and at least one non-return check valve, which in the fresh air position permits a circulating air flow in a through-flow direction from the circulating air inlet through the control valve to the air outlet and blocks the circulating air flow in the opposite direction. ### Claim 12 (canceled) ### Claim 13 (canceled) ### Claim 14 (depends on 11) The control device according to claim 11, wherein the non-return check valve includes a valve member arranged at least one of adjustable and movably on the control valve, the valve member cooperating with a passage opening arranged in the control valve to open the passage opening in the through-flow direction and block the passage opening in the opposite direction. ### Claim 15 (depends on 14) The control device according to claim 14, wherein the valve member is at least partially configured elastically and is arranged on an inner side of the control valve facing the air outlet. ### Claim 16 (depends on 14) The control device according to claim 14, wherein the valve member is secured to the control valve in a stationary region, wherein the valve member includes an elastic mobile region that is at least one of movable and adjustable relative to the control member. ### Claim 17 (depends on 11) The control device according to claim 11, wherein the non-return check valve is operable to open relative to the circulating air inlet in response to exceeding a predetermined negative pressure in the fresh air path. ### Claim 18 (depends on 11) The control device according to claim 11, wherein the control valve has an inner side facing the air outlet, wherein the inner side is concave. ### Claim 19 (depends on 11) The control device according to claim 11, further comprising a housing including the circulating air inlet, the fresh air inlet and the air outlet, wherein the control valve is arranged to swivel in the control housing about a swivel axis. ### Claim 20 (depends on 11) The control device according to claim 11, wherein the control valve includes sealing contours that cooperate with counter sealing contours arranged on the control housing in at least one of the fresh air position and the circulating air position. ### Claim 21 A control device for an air-conditioning system, comprising: a fresh air path for communicating fresh air leading from a fresh air inlet to an air outlet; a circulating air path for communicating circulating air leading from a circulating air inlet to the air outlet; a control valve adjustable between a circulating position in which the control valve closes the fresh air path and opens the circulating air path, and a fresh air position in which the control valve closes the circulating air path and opens the fresh air path; at least one non-return check valve including a valve member cooperating with a passage opening, the valve member secured to an inner side of the control valve facing the air outlet in a stationary region, the valve member including an elastic mobile region at least one of movable and adjustable relative to the control valve; wherein the valve member in the fresh air position is movable to (i) open the passage opening to a circulating air flow in a through-flow direction from the circulating air inlet to the air outlet, and (ii) block the passage opening to stop the circulating air flow in an opposite direction. ### Claim 22 (depends on 21) The control device according to claim 21, further comprising a housing including the circulating air inlet, the fresh air inlet and the air outlet, wherein the control valve is arranged to swivel in the control housing about a swivel axis.