Indoor unit of air-conditioning apparatus

Patent metadata

Field	Value
Publication number	US-10746416-B2
Application number	US-201515545353-A
Country	US
Kind code	B2
Filing date	Apr 17, 2015
Priority date	Apr 17, 2015
Publication date	Aug 18, 2020
Grant date	Aug 18, 2020

Abstract

An indoor unit of an air-conditioning apparatus includes a fan unit having an axial fan and a motor that drives the axial fan. The indoor unit also includes a pair of support arms on a back plate constituting a back surface of a casing. The fan unit is supported by the pair of support arms from the below.

First claim

The invention claimed is:

1. An indoor unit of an air-conditioning apparatus, comprising:
a casing having an air inlet formed in an upper surface, an air outlet formed below the air inlet, and a back plate constituting a back surface;
a fan unit including a fan outer frame having a bell mouth, an axial fan provided in the bell mouth, and a motor that drives the axial fan, the fan unit being provided downstream of the air inlet in the casing; and
a heat exchanger provided downstream of the axial fan in the casing, the heat exchanger being configured to exchange heat between air, taken into the casing by the axial fan, and refrigerant, wherein
the back plate includes a pair of support arms protruding forward from the back plate, the pair of support arms being connected to the back plate only at end portions in a width direction of the back plate, and
the fan unit is supported in the casing by the pair of support arms from below.

2. The indoor unit of the air-conditioning apparatus of claim 1 , wherein
the fan outer frame includes mounting plates each having a first through hole, the mounting plates each being provided in front of each of the support arms,
each of the support arms has a first screw hole formed at a position facing the first through hole of the mounting plate, and
the fan unit is fixed to the support arms by screwing and fixing screws, inserted in the first through holes of the mounting plates, to the first screw holes of the support arms.

3. The indoor unit of the air-conditioning apparatus of claim 2 , wherein
each of the mounting plates has a first recess, and
a tip portion of each of the support arms has a positioning pin protruding therefrom, the positioning pin being to be inserted in the first recess of the mounting plate.

4. The indoor unit of the air-conditioning apparatus of claim 1 , wherein
the fan outer frame has a guide groove formed along a front and back direction at a position facing an upper part of at least one of the support arms, and
the at least one of the support arms is inserted in the guide groove slidably in the front and back direction.

5. The indoor unit of the air-conditioning apparatus of claim 1 , wherein
front end portions of the pair of support arms extend forward beyond a center of gravity of the fan unit.

6. The indoor unit of the air-conditioning apparatus of claim 1 , wherein
the heat exchanger includes a pair of side plates provided to right and left ends,
each of the side plates includes mounting parts each having a second through hole, the mounting parts each being provided in front of each of the support arms,
each of the support arms has a second screw hole formed at a position facing the second through hole of the mounting part, and
the heat exchanger is fixed to the support arms by screwing and fixing screws, inserted in the second through holes of the mounting parts, to the second screw holes of the support arms.

7. The indoor unit of the air-conditioning apparatus of claim 6 , wherein
each of the mounting parts has a second recess, and
a tip portion of each of the support arms has a positioning pin protruding therefrom, the positioning pin being to be inserted in the second recess of the mounting part.

8. The indoor unit of the air-conditioning apparatus of claim 6 , wherein
the heat exchanger includes a first heat exchange element, a second heat exchange element, a third heat exchange element, and a fourth heat exchange element, and the first heat exchange element, the second heat exchange element, the third heat exchange element, and the fourth heat exchange element are arranged from a front face side to a back face side of the casing,
the first heat exchange element, the second heat exchange element, the third heat exchange element, and the fourth heat exchange element are arranged in a W shape in a side view, and
tip portions of the support arms extend to a position facing an upper end portion of the second heat exchange element or an upper end portion of the third heat exchange element.

9. The indoor unit of the air-conditioning apparatus of claim 8 , wherein
the first heat exchange element, the second heat exchange element, the third heat exchange element, and the fourth heat exchange element are uniform in size.

10. The indoor unit of the air-conditioning apparatus of claim 1 , further comprising
a cleaning unit including a filter for removing dust from air taken into the casing, and a cleaning mechanism for removing the dust adhering to the filter and storing the dust, wherein
the cleaning unit is disposed above the fan unit and is supported by the fan unit from below.

11. The indoor unit of the air-conditioning apparatus of claim 1 , wherein
one the pair of the support arms is connected to the back plate at a far right end in the width direction of the back plate, and
a second, other of the pair of the support arms is connected to the back plate at a far left end in the width direction of the back plate.

12. The indoor unit of the air-conditioning apparatus of claim 1 , wherein
each of the pair of support arms extends forward from the back plate of the casing to a distance that is less than half of the length of the casing in a back-front direction.

13. The indoor unit of the air-conditioning apparatus of claim 12 , wherein
each of the pair of support arms does not contact a front end or a front plate of the casing.

14. The indoor unit of the air-conditioning apparatus of claim 11 , wherein
each of the pair of support arms extends forward from the back plate of the casing to a distance that is less than half of the length of the casing in a back-front direction.

15. The indoor unit of the air-conditioning apparatus of claim 14 , wherein
each of the pair of support arms does not contact a front end or a front plate of the casing.

Assignees

• Mitsubishi Electric Corp

Inventors

• Moro Koki
• Oishi Masayuki
• Yokota Syuhei

Classifications

• B01D46/74

  by forces created by movement of the filter element · CPC title

• F24F1/00

  Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station · CPC title

• F24F13/00 Primary

  Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening · CPC title

• F24F13/32

  Supports for air-conditioning, air-humidification or ventilation units · CPC title

• F24F1/0029 Primary

  Axial fans · CPC title