# US 2018/0023822 A1 · Indoor unit and air-conditioning apparatus

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2018/0023822 A1
- Document ID: US20180023822A1
- Status: Published application
- Kind: A1
- Application number: 15/546,689
- Filed: 2015-05-20
- Published: 2018-01-25
- Earliest claimed: 2015-05-20
- Assignees: Mitsubishi Electric Corporation
- Applicants: Mitsubishi Electric Corporation
- Inventors: Naoya MATSUNAGA; Takaaki TAKISHITA; Tatsuo FURUTA; Takahiro KOMATSU
- Web page: https://patentgrep.com/patent/US20180023822A1

## CPC

- F24F 1/0007: Indoor units, e.g. fan coil units (self-contained units F24F1/02)
- F24F 1/00: Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F 1/0011: characterised by air outlets
- F24F 1/0047: mounted in the ceiling or at the ceiling
- F24F 1/0063: by the mounting or arrangement of the heat exchangers
- F24F 1/0071: with means for purifying supplied air (perfuming or deodorising means F24F1/008)
- F24F 13/20: Casings or covers
- F24F 13/222: {for evacuating condensate}
- F24F 1/0083: with dehumidification means
- F24F 2013/227: {Condensate pipe for drainage of condensate from the evaporator}
- F24F: AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING (removing dirt or fumes from areas where they are produced B08B15/00; vertical ducts for carrying away waste gases from buildings E04F17/02; tops for chimneys or ventilating shafts, terminals for flues F23L17/02)

## Abstract

An indoor unit includes: a casing including a top plate and lateral plates; a motor mounted to a central part on an inner surface side of the top plate; a turbofan fixed to a rotary shaft of the motor and configured to rotate through drive of the motor; a drain pan received in the casing and mounted to the lateral plates of the casing; and a bellmouth mounted to the drain pan and configured to rectify a fluid flowing into the casing. The drain pan includes a positioning fitting having: a casing-fixing threaded hole for allowing the drain pan to be fixed to the casing with a screw; and a bellmouth-fixing threaded hole for allowing the bellmouth to be fixed to the drain pan with a screw.

## Claims

### Claim 1

An indoor unit, comprising:
a casing comprising a top plate and lateral plates;
a motor mounted to a central part on an inner surface side of the top plate;
a fan fixed to a rotary shaft of the motor and configured to rotate through drive of the motor;
a drain pan received in the casing and mounted to the lateral plates of the casing; and
a bellmouth mounted to the drain pan and configured to rectify a fluid flowing into the casing,
the drain pan comprising a positioning fitting having
a casing-fixing threaded hole for allowing the drain pan to be fixed to the casing with a screw; and
a bellmouth-fixing threaded hole for allowing the bellmouth to be fixed to the drain pan with a screw
wherein
the positioning fitting has an oblong hole for allowing the bellmouth to be positioned in conjunction with the bellmouth-fixing threaded hole,
the drain pan has a recessed portion conforming to the oblong hole, and
the bellmouth has a projection portion to be fitted into the recessed portion through the oblong hole.

### Claim 2

(canceled)

### Claim 3 (depends on 1)

The indoor unit of claim 1, wherein the bellmouth and the drain pan are positioned to each other at one position.

### Claim 4 (depends on 1)

The indoor unit of claim 1, wherein the positioning fitting is formed by processing a metal plate or a resin.

### Claim 5 (depends on 1)

An air-conditioning apparatus, comprising:
the indoor unit of claim 1; and
an outdoor unit configured to supply heat to the indoor unit side.

### Claim 6 (depends on 3)

The indoor unit of claim 3, wherein the positioning fitting is formed by processing a metal plate or a resin.

### Claim 7 (depends on 3)

An air-conditioning apparatus, comprising:
the indoor unit of claim 3;
an outdoor unit configured to supply heat to the indoor unit side.

### Claim 8 (depends on 4)

An air-conditioning apparatus, comprising:
the indoor unit of claim 4;
an outdoor unit configured to supply heat to the indoor unit side.