Indoor unit of air-conditioning apparatus

Patent metadata

Field	Value
Publication number	US-2016334129-A1
Application number	US-201415112254-A
Country	US
Kind code	A1
Filing date	Mar 27, 2014
Priority date	Mar 27, 2014
Publication date	Nov 17, 2016
Grant date	—

Abstract

An indoor unit of an air-conditioning apparatus includes a body casing having an air inlet formed in an upper portion of the body casing and an air outlet formed in a lower portion of the body casing; a ventilation passage formed in the body casing; an evaporator provided to a refrigerant circuit, disposed in an inclined manner in the ventilation passage, and covering the ventilation passage such that air freely passes; a main drain pan disposed below the evaporator; and a fan disposed in the ventilation passage. The evaporator is divided into an upper heat exchanger and a lower heat exchanger. A sub-drain pan that receives dew condensation water coming out from a gap of the joint is disposed at a downstream side in a ventilation direction of a joint between the upper heat exchanger and the lower heat exchanger.

First claim

1 . An indoor unit of an air-conditioning apparatus, comprising:
a body casing having an air inlet and an air outlet, the air inlet being formed in an upper portion of the body casing, the air outlet being formed in a lower portion of the body casing; a ventilation passage formed in the body casing and connecting the air inlet and the air outlet to each other; an evaporator provided to a refrigerant circuit, disposed in an inclined manner in the ventilation passage, and covering the ventilation passage such that air freely passes; a main drain pan disposed below the evaporator and receiving dew condensation water from the evaporator; a fan disposed in the ventilation passage; and a sub-drain pan disposed only at a downstream side in a ventilation direction of the evaporator, the sub-drain pan receiving dew condensation water that comes out from a gap of the evaporator.

2 . The indoor unit of the air-conditioning apparatus of claim 7 , wherein the sub-drain pan is disposed at a position where a dew condensation water is collectable, the position being determined based on a relationship between an inclination angle of the evaporator with respect to a gravitation direction and a speed of air that passes through the gap of the joint.

3 . The indoor unit of the air-conditioning apparatus of claim 1 , wherein the sub-drain pan is disposed in contact with the evaporator.

4 . The indoor unit of the air-conditioning apparatus of claim 1 , wherein the sub-drain pan is disposed such that an inclination angle of the sub-drain pan with respect to a gravitation direction is between an inclination angle of the evaporator and a horizontal.

5 . The indoor unit of the air-conditioning apparatus of claim 1 , wherein the sub-drain pan includes
a water receiving bottom plate that receives the dew condensation water, and a peripheral wall section that surrounds a periphery of the water receiving bottom plate so as to prevent water leakage.

6 . The indoor unit of the air-conditioning apparatus of claim 1 , further comprising
a vertically long plate mounted on a surface at a downstream-side in the ventilation direction of the evaporator, and a fixing fitting for connecting the vertically long plate and a central portion of the sub-drain pan in a left-right direction.

7 . The indoor unit of the air-conditioning apparatus of claim 1 , wherein the evaporator is divided into an upper heat exchanger and a lower heat exchanger joined to a lower portion of the upper heat exchanger, and
wherein the sub-drain pan is disposed only at a downstream side in a ventilation direction of a joint between the upper heat exchanger and the lower heat exchanger.

Assignees

• Mitsubishi Electric Corp

Inventors

• Shinoda Ippei
• Kawai Kazuhiko
• Mochizuki Yuki
• Kusutani Satoshi

Classifications

• F24F13/222 Primary

  for evacuating condensate · CPC title

• F28F17/005

  Means for draining condensates from heat exchangers, e.g. from evaporators (F28B9/08 takes precedence) · CPC title

• F28D1/0477

  the conduits being bent in a serpentine or zig-zag · CPC title

• F25B2339/02

  Details of evaporators · CPC title

• F25B39/02

  Evaporators · CPC title