# US 8,784,040 B2 · Ventilator

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- Number: US 8,784,040 B2
- Document ID: US8784040B2
- Status: Granted
- Kind: B2
- Application number: 12/919,335
- Filed: 2008-05-26
- Published: 2011-01-13
- Granted: 2014-07-22
- Earliest claimed: 2008-05-26
- Assignees: Mitsubishi Electric Corporation
- Applicants: Kenji Masuda; Yoshikatsu Nankaku; Daisuke Nagasaki; Akihiro Ikawa
- Inventors: Kenji Masuda; Yoshikatsu Nankaku; Daisuke Nagasaki; Akihiro Ikawa
- Web page: https://patentgrep.com/patent/US8784040B2

## CPC

- F24F 7/007: with forced flow (using ducting systems F24F7/06)
- F04D 25/12: the unit being adapted for mounting in apertures
- F04D 29/4226: {Fan casings}
- F04D 29/601: {specially adapted for elastic fluid pumps}
- F24F 7/013: using wall or window fans, displacing air through the wall or window
- 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)
- F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02)

## Abstract

A ventilator includes a body casing having an opening formed in its lower portion and an exhaust port formed on one side; a fan that is provided in the body casing, for sucking indoor air from the opening and exhausting the indoor air from the exhaust port; a resin fan casing that has a suction port and forms an air passage of the fan; a protection frame formed outside the air passage to cover a terminal block provided outside the air passage; a resin terminal block cover that watertightly seals a protection frame opening of a lower portion of the protection frame and is opened and closed; a sheet-metal case that is provided in the protection frame and stores the terminal block; and a sheet-metal terminal block cover that opens and closes a lower opening of the sheet-metal case.

## Claims

### Claim 1

A ventilator, comprising:
a body casing that has an opening formed in a lower portion and an exhaust port formed on one side;
a fan that is provided in the body casing, sucks indoor air from the opening, and exhausts the indoor air from the exhaust port;
a resin fan casing that has a suction port, is provided in the opening, closes the opening other than the suction port, and forms an air passage of the fan;
a protection frame that is formed outside the air passage of the fan casing to cover a terminal block provided in an internal corner of the body casing outside the air passage of the fan casing;
a resin terminal block cover that watertightly seals a protection frame opening of a lower portion of the protection frame and can be opened and closed;
a sheet-metal case that is provided in the protection frame and stores the terminal block;
a sheet-metal terminal block cover that opens and closes a lower opening of the sheet-metal case; and
a rib provided on the rear side of the resin terminal block cover, such that the sheet-metal terminal block cover bumps against the rib and closing of the resin terminal block cover is disabled, when the resin terminal block cover is closed in a state in which the sheet-metal terminal block cover is opened.

### Claim 2 (depends on 1)

The ventilator of claim 1,
wherein a semicylindrical cover hooking portion is provided in the sheet-metal case and a slit of the sheet-metal terminal block cover is hooked on the cover hooking portion.

### Claim 3 (depends on 2)

The ventilator of claim 2,
wherein, when the sheet-metal terminal block cover is opened by 90° or more, the sheet-metal terminal block cover is brought into contact with the protection frame opening, such that the slit of the sheet-metal terminal block cover is not released from an opening of the semicylindrical cover hooking portion.