# US 2019/0170159 A1 · Blower device and vehicular air-conditioning device

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- Number: US 2019/0170159 A1
- Document ID: US20190170159A1
- Status: Published application
- Kind: A1
- Application number: 16/092,641
- Filed: 2017-07-06
- Published: 2019-06-06
- Earliest claimed: 2016-07-15
- Assignees: Mitsubishi Heavy Industries Thermal Systems, Ltd.
- Applicants: Mitsubishi Heavy Industries Thermal Systems, Ltd.
- Inventors: Satoshi KOMINAMI; Tomoki NAKAMURA
- Web page: https://patentgrep.com/patent/US20190170159A1

## CPC

- F04D 25/082: {the unit having provision for cooling the motor}
- B60H 1/32: Cooling devices {(B60H1/00478, B60H1/005 take precedence)}
- F04D 25/06: the pump being electrically driven (F04D25/08 takes precedence)
- F04D 29/4226: {Fan casings}
- F04D 29/5806: {Cooling the drive system}
- F04D 29/582: {specially adapted for elastic fluid pumps}
- B60H 1/00: Heating, cooling or ventilating devices
- B60H 1/00035: {for sending an air stream of uniform temperature into the passenger compartment}
- B60H 1/00471: {The ventilator being of the radial type, i.e. with radial expulsion of the air}
- F04D 25/08: the working fluid being air, e.g. for ventilation
- F04D 29/58: Cooling (of machines or engines in general F01P); Heating; Diminishing heat transfer {(for the motor of air-pump units F04D25/082; cooling of shafts or bearings F04D29/04)}
- F04D 29/5826: {Cooling at least part of the working fluid in a heat exchanger}
- F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02)
- B60H: ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES

## Abstract

The present invention provides a blower device and a vehicular air-conditioning device including a chamber taking therein a part of the air through a flow path portion so as to cool a motor, whereby water drop is prevented from reaching the motor with higher reliability. This air blower includes: a casing (11) including an air intake port (23), an air discharge port, and a discharge flow path portion (31) communicating between the air intake port (23) and the air discharge port; a scroll fan (22) provided in the casing (11) so as to take in the air from the air intake port (23) and generate an air flow to the air discharge port through the discharge flow path portion (31); a motor (21) rotationally driving the scroll fan (22); and a motor cooling unit (50) cooling the motor (21). The motor cooling unit (50) includes a chamber (51) taking therein a part of the air from the discharge flow path portion (31) and a cooling duct (52) having an opening portion (57a) which opens into the chamber (51) at one end and supplying, to the motor (21), the air in the chamber (51) taken in through the opening portion (57a). The ceiling portion (55A) of the chamber (51) has an inclined surface (59) which is inclined downward from above.

## Claims

### Claim at position 1

1-4. (canceled)

### Claim 5

A blower device comprising:
a casing comprising an air intake port, an air discharge port, and a flow path portion communicating between the air intake port and the air discharge port;
a fan taking in air from the air intake port and generating an air flow to the air discharge port through the flow path portion;
a motor rotationally driving the fan; and
a motor cooling unit cooling the motor,
the motor cooling unit comprising a chamber communicating with the flow path portion through an opening formed in a side wall on the fan side of the casing, which forms the flow path portion and taking therein a part of the air from the flow path portion, and
a duct having an opening portion that opens into the chamber and supplying, to the motor, the air in the chamber taken in through the opening portion, and
a ceiling portion of the chamber having an inclined surface that is inclined downward from above.

### Claim 6 (depends on 5)

The blower device according to claim 5, wherein the inclined surface is formed at least vertically above the opening portion.

### Claim 7 (depends on 5)

The blower device according to claim 5, wherein the inclined surface is formed into an umbrella shape that is gradually inclined downward to a radially outer portion from a central portion of the ceiling portion.

### Claim 8 (depends on 5)

A vehicular air-conditioning device comprising the blower device according to any one of claim 5.

### Claim 9 (depends on 7)

The blower device according to claim 7, wherein the inclined surface is formed into an umbrella shape that is gradually inclined downward to a radially outer portion from a central portion of the ceiling portion.

### Claim 10 (depends on 6)

A vehicular air-conditioning device comprising the blower device according to claim 6.

### Claim 11 (depends on 7)

A vehicular air-conditioning device comprising the blower device according to claim 7.

### Claim 12 (depends on 9)

A vehicular air-conditioning device comprising the blower device according to claim 9.