Indoor unit of air conditioner

Patent metadata

Field	Value
Publication number	US-2025207787-A1
Application number	US-202318846277-A
Country	US
Kind code	A1
Filing date	Mar 24, 2023
Priority date	Mar 30, 2022
Publication date	Jun 26, 2025
Grant date	—

Abstract

There is provided an indoor unit of an air conditioner to suppress the decrease in the amount of heat exchange between a refrigerant and air due to pressure loss. In the indoor unit of the air conditioner, a second heat exchange part has a high wind velocity region where a wind velocity of air passing through the second heat exchange part is relatively high and a low wind velocity region where the wind velocity of air is relatively low, and the high wind velocity region is located above the low wind velocity region in a direction of gravity. At least one first heat transfer tube is disposed in the high wind velocity region, and at least one second heat transfer tube is disposed in the low wind velocity region. A first header is connected to each of the first heat transfer tube and the second heat transfer tube. The first header has a first internal space to which the first heat transfer tube and the second heat transfer tube are commonly connected. When using a heat exchanger as a condenser, the refrigerant flowed out from a first heat exchange part 110 flows into the first internal space of the first header, and then, the refrigerant flows into each of the first heat transfer tube and the second heat transfer tube from the first internal space.

First claim

1 . An indoor unit of an air conditioner, comprising:
a heat exchanger that includes a first heat exchange part and a second heat exchange part, wherein the second heat exchange part has a high wind velocity region where a wind velocity of air passing through the second heat exchange part is relatively high and a low wind velocity region where the wind velocity of air is relatively low, and the high wind velocity region is located above the low wind velocity region in a direction of gravity, at least one first heat transfer tube is disposed in the high wind velocity region, and at least one second heat transfer tube is disposed in the low wind velocity region, a first header is connected to each of the first heat transfer tube and the second heat transfer tube, the first header has a first internal space to which the first heat transfer tube and the second heat transfer tube are commonly connected, the refrigerant flowed out from the first heat exchange part flows into the first internal space of the first header, and then the refrigerant flows into each of the first heat transfer tube and the second heat transfer tube from the first internal space when the heat exchanger is used as a condenser.

2 . The indoor unit of an air conditioner according to claim 1 , wherein
the first header is provided with an inflow port into which the refrigerant flowed out from the first heat exchange part flows, and the inflow port is disposed in a lower part of the first header in the direction of gravity.

3 . The indoor unit of an air conditioner according to claim 1 , further comprising
a casing that houses the heat exchanger and includes an inlet port into which the air is inhaled and an outlet port from which the air is blown out; and an indoor fan that is housed in the casing, inhales the air via the inlet port, and blows out the air that passes through the heat exchanger via the outlet port, the casing including a guide plate that guides the air that passes through the heat exchanger to the outlet port, the guide plate being provided between the low wind velocity region of the second heat exchange part and the fan.

4 . The indoor unit of an air conditioner according to claim 1 , further comprising
a casing that houses the heat exchanger and includes an inlet port into which the air is inhaled and an outlet port from which the air is blown out, the casing including a drain pan that collects condensed water flowing down from the second heat exchange part, the low wind velocity region being located closer to the drain pan than the high wind velocity region.

5 . The indoor unit of an air conditioner according to claim 1 , wherein
the first heat exchange part includes a second header that allows the refrigerant to flow out when the heat exchanger is used as a condenser, the second header has a plurality of second internal spaces divided by at least one partition plate, and a volume of the first internal space is larger than each of volumes of the plurality of second internal spaces.

6 . The indoor unit of an air conditioner according to claim 5 , wherein
each of the plurality of second internal spaces is connected to the first internal space via a pipe.

Assignees

• Fujitsu General Ltd

Inventors

• Maema Yoshinari
• Shimano Daiki

Classifications

• F24F2221/54

  Heating and cooling, simultaneously or alternatively · CPC title

• F24F13/222

  for evacuating condensate · CPC title

• F24F1/06

  Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger · CPC title

• F24F1/0022

  Centrifugal or radial fans · CPC title

• F24F1/0003

  characterised by a split arrangement, wherein parts of the air-conditioning system, e.g. evaporator and condenser, are in separately located units · CPC title