초록 ▼

Engine cooling water is charged to a flexible diaphragm member (3d) to expand the flexible diaphragm member ( 3d) so that the substantial sectional area of an air passage (3b) is decreased when a ventilation resistance, in an air conditioning casing (2) in a maximum heating or a foot mode, is increa

Engine cooling water is charged to a flexible diaphragm member (3d) to expand the flexible diaphragm member ( 3d) so that the substantial sectional area of an air passage (3b) is decreased when a ventilation resistance, in an air conditioning casing (2) in a maximum heating or a foot mode, is increased. On the other hand, the engine cooling water is discharged from the flexible diaphragm member (3d) to deflate the flexible diaphragm member (3d) so that the substantial sectional area of the air passage (3b) is increased when a ventilation resistance, in the air conditioning casing (2) in maximum cooling or face mode, is decreased. Thus, the property of a fan (3) can be changed into a property suitable for foot mode having a large ventilation resistance, while heating air is being supplied.

대표청구항 ▼

The invention claimed is: 1. An air conditioner for a vehicle, comprising a fan; an air conditioning casing that is provided at the downstream side of the fan in an air flow direction and that defines an air passage through which air is blown from the fan to a vehicle compartment; heating means tha

The invention claimed is: 1. An air conditioner for a vehicle, comprising a fan; an air conditioning casing that is provided at the downstream side of the fan in an air flow direction and that defines an air passage through which air is blown from the fan to a vehicle compartment; heating means that is housed in the air conditioning casing and that heats the air blown to a vehicle compartment; and a flexible diaphragm member defining a sealed chamber to/from which a fluid is charged/discharged to vary the sectional area of the air passage, said flexible diaphragm member being disposed in the air passage in the fan, wherein the fluid is charged or discharged in accordance with a ventilation resistance in the air conditioning casing. 2. An air conditioner for a vehicle, comprising: a fan; an air conditioning casing that is provided at the downstream side of the fan in an air flow direction and that defines an air passage through which air is blown from the fan to a vehicle compartment; heating means that is housed in the air conditioning casing and that heats the air blown to a vehicle compartment; and a flexible diaphragm member defining a sealed chamber to/from which a fluid is charged/discharged to vary the sectional area of the air passage, said flexible diaphragm member being disposed in the air passage in the fan; wherein a heated medium is charged to the flexible diaphragm member in maximum heating. 3. An air conditioner for a vehicle, comprising a fan; an air conditioning casing that is provided at the downstream side of the fan in an air flow direction and that defines an air passage through which air is blown from the fan to a vehicle compartment; heating means that is housed in the air conditioning casing and that heats the air blown to a vehicle compartment; and a flexible diaphragm member to/from which a fluid is charged/discharged to vary the sectional area of the air passage, said flexible diaphragm member being disposed in the air passage in the fan, wherein a heated medium is charged to the flexible diaphragm member in maximum heating; and the heated medium is engine cooling water. 4. An air conditioner for a vehicle, comprising a fan; an air conditioning casing that is provided at the downstream side of the fan in an air flow direction and that defines an air passage through which air is blown from the fan to a vehicle compartment; heating means that is housed in the air conditioning casing and that heats the air blown to a vehicle compartment; and a flexible diaphragm member defining a sealed chamber to/from which a fluid is charged/discharged to vary the sectional area of the air passage, said flexible diaphragm member being disposed in the air passage in the fan, wherein a heated medium is charged to the flexible diaphragm member in foot mode in which air is blown toward the lower side of a vehicle compartment. 5. An air conditioner for a vehicle, comprising a fan; an air conditioning casing that is provided at the downstream side of the fan in an air flow direction and that defines an air passage through which air is blown from the fan to a vehicle compartment; heating means that is housed in the air conditioning casing and that heats the air blown to a vehicle compartment; and heating means that is housed in the air conditioning casing and that heats the air blown to a vehicle compartment; and a flexible diaphragm member to/from which a fluid is charged/discharged to vary the sectional area of the air passage, said flexible diaphragm member being disposed in the air passage in the fan, wherein a heated medium is charged to the flexible diaphragm member in foot mode in which air is blown toward the lower side of a vehicle compartment; and the heated medium is engine cooling water. 6. An air conditioner for a vehicle, comprising a fan; an air conditioning casing that is provided at the downstream side of the fan in an air flow direction and that defines an air passage through which air is blown from the fan to a vehicle compartment; heating means that is housed in the air conditioning casing and that heats the air blown to a vehicle compartment; and a flexible diaphragm member to/from which a fluid is charged/discharged to vary the sectional area of the air passage, said flexible diaphragm member being disposed in the air passage in the fan, wherein the fluid is charged or discharged in accordance with a ventilation resistance in the air conditioning casing; and a number of recessed and projected portions are provided in the portion of the flexible diaphragm member which is exposed to air passing through the air passage. 7. An air conditioner for a vehicle, comprising a fan; an air conditioning casing that is provided at the downstream side of the fan in an air flow direction and that defines an air passage through which air is blown from the fan to a vehicle compartment; heating means that is housed in the air conditioning casing and that heats the air blown to a vehicle compartment; and a flexible diaphragm member to/from which a fluid is charged/discharged to vary the sectional area of the air passage, said flexible diaphragm member being disposed in the air passage in the fan, wherein the fluid is charged or discharged in accordance with a ventilation resistance in the air conditioning casing; and the flexible diaphragm member is divided into a plurality of layered spaces, and the spaces to/from which a fluid is charged/discharged are switched in accordance with a ventilation resistance in the air conditioning casing. 8. An air conditioner for a vehicle, comprising a fan; an air conditioning casing that is provided at the downstream side of the fan in an air flow direction and that defines an air passage through which air is blown from the fan to a vehicle compartment; heating means that is housed in the air conditioning casing and that heats the air blown to a vehicle compartment; and a flexible diaphragm member to/from which a fluid is charged/discharged to vary the sectional area of the air passage, said flexible diaphragm member being disposed in the air passage in the fan, wherein the fluid is charged or discharged in accordance with a ventilation resistance in the air conditioning casing; and the fan comprises a centrifugal fan that has a number of vanes, around a rotating shaft thereof, to supply, in radial directions, air drawn along an axial direction of the rotating shaft; and a scroll casing that houses the centrifugal fan and defines a spiral air passage through which air supplied from the centrifugal fan passes, and the flexible diaphragm member is disposed at at least an inner wall of an outer periphery of the scroll casing.