Vehicular air conditioner

Patent metadata

Field	Value
Publication number	US-10017027-B2
Application number	US-201214368658-A
Country	US
Kind code	B2
Filing date	Nov 15, 2012
Priority date	Dec 27, 2011
Publication date	Jul 10, 2018
Grant date	Jul 10, 2018

Abstract

A vehicular air conditioner includes a partitioning portion which separates an inside of an air-conditioning casing into an inside-air passage through which an inside air flows and an outside-air passage through which an outside air flows, a cooling heat exchanger extending across both the inside-air passage and the outside-air passage, a heating heat exchanger heating the inside air and the outside air on a downstream side of the cooling heat exchanger in an air flow, and a restriction portion provided downstream of the cooing heat exchanger in the air flow and limiting inflow of the inside air into the outside-air passage on the way to the heating heat exchanger. The restriction portion is located in the inside-air passage between the cooing heat exchanger and the heating heat exchanger, and includes a first temperature regulation door that regulates a temperature of air supplied to the vehicle compartment.

First claim

The invention claimed is:

1. A vehicular air conditioner comprising:
an air-conditioning casing;
a blower drawing air into the air-conditioning casing;
a partitioning portion separating an inside of the air-conditioning casing into an inside-air passage in which an inside air drawn by the blower from inside a vehicle compartment flows, and an outside-air passage in which an outside air drawn by the blower from outside the vehicle compartment flows;
a cooling heat exchanger extending across both the inside-air passage and the outside-air passage to cool the inside air and the outside air;
a heating heat exchanger extending into both the inside-air passage and the outside-air passage on a downstream side of the cooling heat exchanger in an air flow direction to heat the inside air and the outside air;
a clearance between the partitioning portion and the heating heat exchanger; and
a restriction portion including a first temperature regulation door disposed in the inside-air passage between the cooling heat exchanger and the heating heat exchanger, the first temperature regulation door regulating a flow ratio of an air passing through the heating heat exchanger and an air bypassing the heating heat exchanger, and regulating a temperature of air supplied to the vehicle compartment, wherein
the first temperature regulation door has a surface restricting an air flow,
the surface of the first temperature regulation door includes a first door end portion and a second door end portion that is farther from the partitioning portion than the first door end portion,
a distance between the first door end portion and an air outlet surface of the cooling heat exchanger, through which air passing through the cooling heat exchanger flows out, is shorter than a distance between the second door end portion and the air outlet surface,
the first temperature regulation door is a sliding door,
the restriction portion further includes a sealing portion that extends from the partitioning portion toward the sliding door, the sealing portion blocking an air to flow through the heating heat exchanger when overlapping with a part of the sliding door in the air flow direction,
the sealing portion extends in a direction away from both the partitioning portion and the air outlet surface, and
an inclination angle of the sealing portion with respect to the air outlet surface of the cooling heat exchanger is larger than an inclination angle of the heating heat exchanger with respect to the air outlet surface of the cooling heat exchanger.

2. The vehicular air conditioner according to claim 1 , wherein
the restriction portion further includes a second temperature regulation door disposed in the outside-air passage between the cooling heat exchanger and the heating heat exchanger, the second temperature regulation door separating the outside air flowing in the outside-air passage into an air passing through the heating heat exchanger and an air bypassing the heating heat exchanger, and regulating a temperature of air supplied to the vehicle compartment,
the second temperature regulation door has a surface restricting an air flow,
the surface of the second temperature regulation door includes a first door end portion and a second door end portion that is nearer to the partitioning portion than the first door end portion, and
a distance between the first door end portion and the air outlet surface is shorter than a distance between the second door end portion and the air outlet surface in an entire movable range of the second temperature regulation door.

3. The vehicular air conditioner according to claim 1 , wherein
the heating heat exchanger includes a first end portion located in the outside-air passage, and a second end portion located in the inside-air passage, and
a distance between the first end portion and the air outlet surface is shorter than a distance between the second end portion and the air outlet surface.

4. The vehicular air conditioner according to claim 1 , wherein
the sealing portion extends obliquely from the partitioning portion toward the first temperature regulation door.

5. The vehicular air conditioner according to claim 1 , wherein
the cooling heat exchanger and the heating heat exchanger are parallel to each other, normal to air flow and perpendicular to the partitioning portion.

6. The vehicular air conditioner according to claim 5 , wherein
the first temperature regulation door and the sealing portion are parallel to each other.

7. The vehicular air conditioner according to claim 1 , wherein
the cooling heat exchanger, the heating heat exchanger and a second temperature regulation door disposed in the outside-air passage between the cooling heat exchanger and the heating heat exchanger are parallel to each other, normal to air flow and perpendicular to the partitioning portion.

8. The vehicular air conditioner according to claim 1 further comprising a first tilt angle defined between the sealing portion and the air outlet surface, and a second tilt angle defined between the first temperature regulation door and the outlet surface, wherein a measurement of the first tilt angle is equal to a measurement of the second tilt angle.

9. The vehicular air conditioner according to claim 1 , wherein the distance between the first door end portion and the air outlet surface of the cooling heat exchanger is shorter than the distance between the second door end portion and the air outlet surface in an entire movable range of the first temperature regulation door.

10. The vehicular air conditioner according to claim 1 , wherein the sealing portion is parallel to the first temperature regulation door.

11. A vehicular air conditioner comprising:
an air-conditioning casing;
a blower drawing air into the air-conditioning casing;
a partitioning portion separating an inside of the air-conditioning casing into an inside-air passage in which an inside air drawn by the blower from inside a vehicle compartment flows, and an outside-air passage in which an outside air drawn by the blower from outside the vehicle compartment flows;
a cooling heat exchanger extending across both the inside-air passage and the outside-air passage to cool the inside air and the outside air;
a heating heat exchanger extending into both the inside-air passage and the outside-air passage on a downstream side of the cooling heat exchanger in an air flow direction to heat the inside air and the outside air;
a clearance between the partitioning portion and the heating heat exchanger; and
a restriction portion including a first temperature regulation door disposed in the inside-air passage between the cooling heat exchanger and the heating heat exchanger, the first temperature regulation door regulating a flow ratio of an air passing through the heating heat exchanger and an air bypassing the heating heat exchanger, and regulating a temperature of air supplied to the vehicle compartment, wherein
the first temperature regulation door has a surface restricting an air flow,
the surface of the first temperature regulation door includes a first door end portion and a second door end portion that is farther from the partitioning portion than the first door end portion,
a distance between the first door end portion and an air outlet surface of the cooling heat exchanger, through which air passing through the cooling heat exchanger flows out, is shorter than a distance between the second door end portion and the air outlet surface,
the first temperature regulation door is a sliding door,
the restriction portion further includes a sealing portion that extends from the partitioning portion toward the sliding door, the seali

Assignees

• Denso Corp

Inventors

• Haraguchi Akihiro
• Kuwada Katsuji

Classifications

• B60H1/00028 Primary

  Constructional lay-out of the devices in the vehicle · CPC title

• B60H2001/00135

  Deviding walls for separate air flows · CPC title

• B60H1/00064 Primary

  for sending air streams of different temperatures into the passenger compartment · CPC title