Ventilation Device For A Vehicle Cabin

Abstract

A ventilation device for a cabin of a vehicle, the ventilation device includes a temperature-control circuit in which a fluid circulates for heat transfer; an ambient heat exchanger via which heat is exchanged between the temperature-control circuit and a cabin environment; a cabin heat exchanger via which heat is exchanged between the temperature-control circuit and an air flow provided for ventilating the cabin; one or more liquid channels connecting the ambient heat exchanger to the cabin heat exchanger; an air supply system for directing air to the cabin heat exchanger to supply the passengers in the cabin, and an air conveyor device for conveying supply air; and a distance between the air conveyor device and the passenger is greater than a distance between the cabin heat exchanger and the passenger.

Claims

1. A ventilation device of a vehicle, the ventilation device comprising a temperature-control circuit in which a fluid circulates for heat transport; an ambient heat exchanger, via which heat is exchanged between the temperature-control circuit and a cabin environment of the cabin; a cabin heat exchanger, via which the heat is exchanged between the temperature-control circuit and an air flow provided for ventilating the cabin; one or more liquid channels connecting the ambient heat exchanger to the cabin heat exchanger to allow circulation of liquid between the ambient heat exchanger and the cabin heat exchanger; an air supply system for supplying the air flow to the cabin heat exchanger; and an air conveyor device to convey the air flow to the cabin heat exchanger; wherein a distance between the air conveyor device and a passenger in the cabin is greater than a distance between the cabin heat exchanger and the passenger.

2. The ventilation device according to claim 1, wherein the air conveyor device is arranged in a trunk or in a rear of the vehicle.

3. The ventilation device according to claim 1, wherein the air conveyor device is radial ventilator.

4. The ventilation device according to claim 1, wherein one or more of the one or more liquid channels has a wall formed from an elastic tube.

5. The ventilation device according to claim 1, wherein the one or more liquid channels has, at least in sections, an open cross-section of less than 3 square centimeters, or less than 1.5 square centimeters.

6. The ventilation device according to claim 1, wherein the fluid circulating in the temperature-control circuit is a liquid.

7. The ventilation device according to claim 1, wherein the ambient heat exchanger is an air-liquid heat exchanger or an evaporator.

8. The ventilation device according to claim 1, wherein characterized in that a further ambient heat exchanger of the ventilation device is a liquid-liquid heat exchanger.

9. A vehicle comprising a cabin; and the ventilation device according to claim 1.

10. The ventilation device according to claim 1, wherein the temperature-control circuit is a closed circuit.

11. The ventilation device according to claim 10, wherein the fluid is liquid and does not evaporate, and has a specific heat capacity that is at least 50% of the specific heat capacity of water.

12. The ventilation device according to claim 11, wherein the fluid consists of at least 90% water and contains antifreeze as a mixture.

13. The ventilation device according to claim 1, wherein the heat exchanger is connected to the temperature-control circuit via a valve, and an inlet an outlet of an engine cooling circuit are provided, via which the temperature-control circuit is supplied with heat, and wherein the heat exchanger is a liquid-liquid heat exchanger.

14. The ventilation device according to claim 13, wherein air-flow cooler or a cooling aggregate is provided at the ambient heat exchanger, via which the temperature-control circuit is cooled, and wherein the ambient heat exchanger is an air-liquid heat exchanger or an evaporator.

15. The ventilation device according to claim 14, wherein the temperature-control circuit comprises a pump to pump the fluid forward in the temperature-control circuit, wherein at a liquid side of the cabin heat exchanger, the heat is transferred to or absorbed by the air flow introduced into the cabin.

16. The ventilation device according to claim 15, wherein an outflow device is positioned above a head and to the side of a head of the passenger, along a centerline of the vehicle or the cabin.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In the following, preferred embodiments of the invention are explained and described in more detail with reference to the accompanying drawing. The figure shows:

[0037] FIG. 1 is a schematic view of a vehicle according to the invention with fluid lines for temperature-controlled ventilation of a vehicle cabin;

DETAILED DESCRIPTION

[0038] FIG. 1 shows a vehicle 100 with a ventilation device 10 for the cabin 102 of the vehicle 100.

[0039] The ventilation device 10 comprises a temperature-control circuit 12 in which a fluid circulates for heat transfer, and an ambient heat exchanger 14b through which heat is exchanged between the temperature-control circuit 12 and a cabin environment. Furthermore, the ventilation device 10 comprises a cabin heat exchanger 16 via which heat is exchanged between the temperature-control circuit 12 and an airflow provided for ventilating the cabin 102, and a plurality of liquid passages 18a-18e connecting the ambient heat exchanger 14b to the cabin heat exchanger 16 to allow circulation of liquid between the ambient heat exchanger 14b and the cabin heat exchanger 16.

[0040] In addition, the ventilation device 10 comprises an air supply system 20 for delivering supply air thereover to the cabin heat exchanger 16 for supply to passengers in the cabin 102, and an air conveyor device 22 for conveying supply air from a position at a distance from a passenger to the cabin heat exchanger 16 and then to the passenger.

[0041] The temperature-control circuit 12 is a closed system. The liquid channels 18a-18e each have walls formed from elastic tubes over at least 80% of their length. The liquid channels 18a-18e are furthermore thermally isolated from the environment. The open cross-section of the liquid channels 18a-18e is less than 3 square centimeters over at least 60% of their channel length.

[0042] A fluid circulates in the temperature-control circuit 12 as a heat transfer medium. The fluid is liquid in any operating state. There is no evaporation. The operating temperature of the fluid is therefore below its boiling point at normal pressure. The fluid has a specific heat capacity that is at least 50% of the specific heat capacity of water. The fluid consists of at least 90% water and contains antifreeze as an admixture.

[0043] At the heat exchanger 14a, which can be connected to the temperature-control circuit 12 via the valve 30, inlets and outlets 26a, 26b of an engine cooling circuit are provided, via which the temperature-control circuit 12 can be supplied with heat in winter. The heat exchanger 14a is thus a liquid-liquid heat exchanger.

[0044] An air-flow cooler or a cooling aggregate, which works with compressed air or evaporation, is provided at the ambient heat exchanger 14b, via which the temperature-control circuit 12 can be cooled in summer. The ambient heat exchanger 14b is thus an air-liquid heat exchanger or an evaporator.

[0045] If the available installation space is small, the functions of the ambient heat exchangers 14a, 14b can also be performed by a single heat exchanger.

[0046] Additionally, a pump 28 is provided in the temperature-control circuit 12 to pump the fluid forward in the temperature-control circuit 12. At the liquid side of the cabin heat exchanger 16, a large amount of heat can be transferred to or absorbed by the airflow to be introduced into the cabin 102 via the liquid temperature control fluid. During heating operation, the temperature of the liquid before entering the heat exchanger 16 is more than 60 degrees Celsius, preferably more than 80 degrees Celsius. During cooling operation, the temperature of the liquid before entering the heat exchanger 16 is less than 20 degrees Celsius, preferably less than 10 degrees Celsius.

[0047] The supply air to be introduced into the cabin 102 is heated or cooled as required by the temperature-control circuit 12. The supply air is taken from a location at a distance from the passengers, in this case the trunk. This is done by means of a radial ventilator, which is also arranged at a distance from the passengers in the trunk to avoid disturbing the passengers with vibrations and noise.

[0048] The supply air to be introduced into the cabin 102 is supplied through a supply channel of the air supply system 20 to the cabin heat exchanger 16, where it is temperature controlled and then supplied to a passenger via an outflow device.

[0049] This outflow device is positioned above the passengers' head height and to the side of the passengers' heads, namely along the centerline of the vehicle 100 or cabin 102.

[0050] Each passenger may also be assigned an individual outflow device, which is arranged in proximity to the respective passenger.

REFERENCE NUMBERS

[0051] 10 ventilation device [0052] 12 temperature-control circuit [0053] 14a, 14b ambient heat exchanger [0054] 16 cabin heat exchanger [0055] 18a-18e liquid channels [0056] 20 air supply system [0057] 22 air conveyor device [0058] 26a, 26b inlet and outlet [0059] 28 pump [0060] 30 valve [0061] 32 outflow device [0062] 34 inflow device [0063] 36 outflow opening [0064] 38a, 38b air-guiding devices [0065] 100 vehicle [0066] 102 cabin