Motor vehicle air-conditioning system

Patent metadata

Field	Value
Publication number	US-11241935-B2
Application number	US-201816120432-A
Country	US
Kind code	B2
Filing date	Sep 3, 2018
Priority date	Sep 4, 2017
Publication date	Feb 8, 2022
Grant date	Feb 8, 2022

Abstract

An air-conditioning system comprises a channel system, a system conveying device positioned in the channel system and configured to convey air in the channel system, a sensor device comprising at least one analysis channel and configured to measure a characteristic of air flowing through the at least one analysis channel, and a suction jet pump comprising a motive-fluid inlet, a suction inlet, and a pump outlet. The system conveying device separates a suction area of the channel system arranged upstream of the system conveying device from a pressure area of the channel system arranged downstream from the system conveying device, and the sensor device further comprises a sensor outlet configured to release air from the sensor device. The motive-fluid inlet is fluidically connected to the pressure area via a suction jet branch-off point within the channel system, and the suction inlet is fluidically connected to the sensor outlet.

First claim

The invention claimed is:

1. An air-conditioning system of a motor vehicle to air-condition a vehicle interior, comprising:
a channel system configured to allow air to flow therethrough during operation;
a conveyor positioned in the channel system and configured to convey air in the channel system, wherein the conveyor separates a suction area of the channel system arranged upstream of the conveyor from a pressure area of the channel system arranged downstream from the conveyor;
a sensor comprising at least one analysis channel and configured to measure a characteristic of air flowing through the at least one analysis channel, wherein the sensor further comprises a sensor outlet configured to release air from the sensor;
a suction jet pump including a motive-fluid inlet, a suction inlet, and a pump outlet;
wherein a suction jet branch-off point is disposed in the pressure area and connects the motive-fluid inlet to the channel system;
wherein the suction inlet is fluidically connected to the sensor outlet;
wherein the conveyor comprises a spiral-shaped spiral channel of the channel system;
wherein the spiral channel includes a start section via which air flows into the spiral channel from the suction area during operation;
wherein the spiral channel includes an end section via which air flows from the spiral channel into the pressure area during operation; and
wherein the suction jet branch-off point is arranged within the end section of the spiral channel.

2. The air-conditioning system according to claim 1 , wherein a suction jet flow-in opening connects the pump outlet to the channel system such that, during operation, air flows from the suction jet pump, through the pump outlet, to the suction jet flow-in opening, and into the channel system.

3. The air-conditioning system according to claim 1 , wherein:
an impeller is arranged in the spiral channel to convey the air;
the spiral channel longitudinally extends between the start section and the end section;
a flow cross-section of the spiral channel enlarges in a continuous manner from the start section to the end section;
between the start section and the end section, a hollow space is formed that is fluidically separated from the spiral channel; and
the sensor is arranged in the hollow space.

4. The air-conditioning system according to claim 3 , wherein the suction jet pump extends through the spiral channel.

5. The air-conditioning system according to claim 2 , wherein the suction jet flow-in opening is arranged downstream from the suction jet branch-off point within the channel system such that, during operation, air flows from the suction jet branch-off point to the suction jet pump and then to the suction jet flow-in opening.

6. The air-conditioning system according to claim 2 , wherein the suction jet flow-in opening is arranged in the suction area.

7. The air-conditioning system according to claim 3 , wherein the suction jet pump comprises an outlet section extending between the motive-fluid inlet and the pump outlet, the outlet section extending through a tongue of the end section facing the impeller.

8. The air-conditioning system according to claim 3 , wherein:
the conveyor includes a drive mechanism configured to drive the impeller;
a cooling channel connects the drive mechanism to the channel system between the start section and the end section of the spiral channel;
the cooling channel is configured to, during operation, lead air for cooling the drive mechanism to the drive mechanism; and
the sensor includes at least one sensor inlet that is fluidically connected to the cooling channel.

9. The air-conditioning system according to claim 1 , further comprising a system filter fluidically connected to the channel system and arranged upstream of the conveyor such that, during operation, air flows from the system filter to the conveyor; and
wherein the suction jet branch-off point is arranged downstream from the system filter such that, during operation, filtered air flows from the system filter to the suction jet branch-off point.

10. The air-conditioning system according to claim 3 , wherein:
the pump outlet is fluidically connected to the channel system via a suction jet flow-in opening;
the end section comprises a tongue facing the impeller; and
the suction jet flow-in opening is arranged on a side of the tongue facing the impeller.

11. The air-conditioning system according to claim 1 , wherein:
the at least one analysis channel comprises an interaction section;
the at least one analysis channel comprises a channel sheath adjoining the at least one analysis channel, in which the interaction section is designed as a break of the channel sheath; and
the interaction section is surrounded by a sheath-air flow path during operation configured to limit a flow of the air through the interaction section.

12. The air-conditioning system according to claim 11 , wherein the sheath-air flow path is fluidically connected to the sensor outlet.

13. The air-conditioning system according to claim 1 , wherein:
the sensor further comprises a sensor housing, the at least one analysis channel arranged in the sensor housing;
the sensor further comprises a flushing-air inlet configured to introduce flushing-air into the sensor housing to flush the sensor housing, and a flushing-air outlet configured to release flushing-air from the sensor housing; and
the flushing-air outlet is fluidically connected to the suction inlet of the suction jet pump.

14. A vehicle, comprising a vehicle interior and an air-conditioning system, the air-conditioning system including:
an air channel system;
a conveyor positioned within the air channel system and configured to convey air in the air channel system, wherein the conveyor separates a suction area of the air channel system arranged upstream of the conveyor from a pressure area of the air channel system arranged downstream from the conveyor;
an air characteristic sensor comprising a sensor inlet and a sensor outlet and configured to measure a characteristic of air flowing therethrough;
a suction jet pump comprising a motive-fluid inlet, a suction inlet, and a pump outlet;
wherein the motive-fluid inlet is fluidically connected to the pressure area via a suction jet branch-off point within the air channel system;
wherein the conveyor comprises a spiral-shaped spiral channel of the channel system;
wherein an impeller is arranged in the spiral channel to convey the air;
wherein the spiral channel comprises a start section and an end section between which a flow cross-section of the spiral channel enlarges in a continuous manner;
wherein, between the start section and the end section, a hollow space is formed that is fluidically separated from the spiral channel;
wherein the sensor is arranged in the hollow space; and
wherein the suction jet branch-off point is arranged within the end section of the spiral channel.

15. The vehicle of claim 14 , wherein:
the air characteristic sensor further comprises an analysis channel having a break therein;
the analysis channel further comprises a channel sheath; and
the channel sheath is configured to have a sheath-air flow pass therethrough configured to bound air flowing through the analysis channel as the air flowing through the analysis channel passes adjacently to the break.

16. The air-conditioning system according to claim 1 , wherein:
a suction jet flow-in opening connects the pump outlet to the channel system;
during operation, a first airflow flows successively from a first portion of the channel system disposed

Assignees

• Mahle Int Gmbh

Inventors

• Eberle Daniel
• Knoeller Rainer
• Michael Markus
• Reiter Anja
• Schultze Oliver
• Seitz Isabelle
• Treier Joachim
• Wolf Walter

Classifications

• B60H1/00792

  Arrangement of detectors (B60H1/00742, B60H1/0075, B60H1/00785 take precedence) · CPC title

• B60H3/0608

  Filter arrangements in the air stream · CPC title

• B60H1/24

  Ventilating devices where the heating or cooling is irrelevant (nozzles or air-diffusers B60H1/34) · CPC title

• B60H1/008 Primary

  the input being air quality · CPC title

• B60H3/00

  Other air-treating devices · CPC title