# US 10,864,801 B2 · Air conditioning device for vehicle

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- Number: US 10,864,801 B2
- Document ID: US10864801B2
- Status: Granted
- Kind: B2
- Application number: 15/999,646
- Filed: 2016-11-23
- Published: 2020-02-20
- Granted: 2020-12-15
- Earliest claimed: 2016-02-22
- Assignees: Denso Corporation
- Applicants: Denso Corporation
- Inventors: Takatomo Narahara; Keisuke Tokorozawa
- Web page: https://patentgrep.com/patent/US10864801B2

## CPC

- B60H 1/00528: {Connections between housing parts}
- B60H 1/3233: {characterised by condensed liquid drainage means}
- B60H 1/00021: {Air flow details of HVAC devices}
- B60H 1/00564: {of air ducts}
- B60H 2001/00085: {of air intake}
- B60H 2001/00178: {comprising an air passage from the HVAC box to the exterior of the cabin}
- B60H: ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES

## Abstract

A first case member of a blower unit has a first communication passage communicating with an air intake side of a blower. A second case member of a temperature adjustment unit has a second communication passage communicating with a condensed water discharge portion through which condensed water is discharged. The respective case members are joined with each other in a state where a portion forming the first communication passage and a portion forming the second communication passage face each other. The portion of the first communication passage includes a drain portion having a groove shape and configured to discharge water in the first communicating passage. The portion of the second communication passage includes a drain receiving portion having a groove shape, communicating with the first communication passage and receiving the water discharged from the drain portion.

## Claims

### Claim 1

An air conditioning device for a vehicle, comprising:
a blower unit in which a blower configured to generate an air flow toward a vehicle interior is housed; and
a temperature adjustment unit in which a cooling heat exchanger configured to cool an air blown from the blower unit is housed, wherein
the blower unit includes a first case member, the first case member having a first upper passage through which the air flow generated by the blower flows, a first lower passage through which the air flow generated by the blower flows below the first upper passage, and a first communication passage communicating with an air intake side of the blower below the first lower passage,
the temperature adjustment unit includes a second case member, the second case member having a second upper passage communicating with the first upper passage, a second lower passage communicating with the first lower passage below the second upper passage, and a second communication passage located upstream of the cooling heat exchanger and in a lower area of the second lower passage and communicating with a condensed water discharge portion through which a condensed water of the cooling heat exchanger is discharged to the outside,
the first case member and the second case member are joined with each other in a state where a portion forming the first communication passage and a portion forming the second communication passage face each other,
the portion of the first communication passage facing the second communication passage includes a drain portion having a groove shape and configured to discharge the water which has entered the first communication passage, and
the portion of the second communication passage facing the first communication passage includes a drain receiving portion having a groove shape, communicating with the first communication passage and configured to receive the water discharged from the drain portion.

### Claim 2 (depends on 1)

The air conditioning device for a vehicle, according to claim 1, wherein
the first case member includes a side wall portion having a plate shape and facing the portion of the second case member forming the second communication passage, and
the drain portion is provided in the side wall portion and has a groove having a slit shape with a groove width smaller than a groove width of the drain receiving portion.

### Claim 3 (depends on 1)

The air conditioning device for a vehicle, according to claim 1, wherein
the second case member includes an opposing wall portion constituting a bottom wall portion of the second lower passage and facing the portion forming the first communication passage, and
the drain receiving portion is provided in the opposing wall portion and has a drain groove recessed downward from the bottom wall portion of the second lower passage.

### Claim 4 (depends on 3)

The air conditioning device for a vehicle, according to claim 3, wherein
the opposing wall portion includes a guide portion that guides the water entering the second lower passage from the first lower passage toward a bottom portion of the drain receiving portion.

### Claim 5 (depends on 1)

The air conditioning device for a vehicle, according to claim 1, wherein
the first case member includes a first protrusion portion protruding downstream in the air flow from a portion of a downstream opening end portion on a downstream side of the first case member in the air flow, and a first recess portion recessed upstream in the air flow from a remaining portion of the downstream opening end portion,
the second case member includes a second protrusion portion protruding upstream in the air flow from a portion of an upstream opening end portion on an upstream side of the second case member in the air flow, and a second recess portion recessed downstream in the airflow from a remaining portion of the upstream opening end portion,
an outer wall portion of the first protrusion portion has a shape corresponding to an inner wall portion of the second recess portion to be fitted into the inner wall of the second recess portion,
an outer wall portion of the second protrusion portion has a shape corresponding to an inner wall of the first recess portion to be fitted into the inner wall portion of the first recess portion, and
the first case member and the second case member are fitted to each other in a state where a sealing member is interposed between the outer wall portion of the first protrusion portion and the inner wall portion of the second recess portion, and where the sealing member is interposed between the inner wall portion of the first recess portion and the outer wall portion of the second protrusion portion.

### Claim 6 (depends on 1)

The air conditioning device for a vehicle, according to claim 1, wherein
the drain portion in the portion forming the first communication passage is the same in number as the drain receiving portion in the portion forming the second communication passage.