Window type air conditioner

Details Window type air conditioner Window type air conditioner

2001-04-27

2002-07-02

Esquivel, Denise L. (Department: 3744)

Refrigeration

Structural installation

Window connected or mounted

C062S298000

Reexamination Certificate

active

06412298

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an air conditioner, and more particularly, to a window type air conditioner which has a simple structure, and is easy to assemble.
2. Background of the Related Art
FIG. 1
illustrates a disassembled perspective view of a related art window type air conditioner, referring to which the related art window type air conditioner will be explained.
There is a front grill
3
in front (a room side) of a base pan
1
, at the bottom of the air conditioner. There is an inlet
3
i
for passage of room air into the air conditioner, disposed in a lower portion of the front grill
3
, and an outlet grill
3
e
in an upper portion of the front grill
3
for discharging the air heat exchanged in the air conditioner to the room again. There is a suction grill (not shown) fitted to the inlet
3
i
and a filter (not shown) between the suction grill and the inlet
3
i
. There is an air guide
7
on an inner side of the front grill
3
, to which an indoor heat exchanger
5
is mounted. The indoor heat exchanger
5
cools down the air drawn through the inlet
3
i
by means of heat exchange with an operative fluid in an air conditioning cycle. The air guide
7
fitted on the base pan
1
partitions an inside space of the air conditioner into an indoor side and an outdoor side. That is, the indoor side is isolated from the outdoor side by the air guide
7
, to cut off air flow and the like. There is a shaft hole
7
′ formed in the air guide
7
to join the indoor side and the outdoor side by passing a rotating shaft of a motor
15
to rotate a sirocco fan
13
. There is a brace
7
B on an upper portion of the air guide
7
formed as one unit with the air guide
7
for fastening shroud
18
of a fan thereto. There is a control box storage space
8
in one side portion of the air guide
7
for storing a control box (not shown). There is a scroll
9
mounted inside of the air guide
7
. The scroll
9
has a flow guide surface
9
g
formed therein with a curvature from one side to the other side. There is an orifice
11
fitted to a front surface of the scroll
9
, and the orifice
11
has an orifice hole
12
for guiding air from the indoor heat exchanger
5
to the sirocco fan
13
. There is a discharge guide
11
e
on top of the orifice
11
as one unit with the orifice
11
for guiding the heat exchanged air to the discharge grill
3
e
. Middle of a rear part of the discharge guide
11
e
is opened, and there are coupling parts
11
′ at the opened part each for coupling with a top portion of the air guide
7
. There is a finger guard ‘F’ in a rear portion of the discharge guide
11
e
for blocking touch to the sirocco fan
13
. There is a projection ‘E’ of ESP at one side of the discharge guide
11
e
for blocking view to a white colored scroll
9
from outside. As explained, there is the discharge guide
11
e
on the orifice
11
, the orifice
11
is inserted between the indoor heat exchanger
5
and the sirocco fan
13
starting from an upper portion to a lower portion, i.e., in a top-down fashion. The sirocco fan
13
inside of the scroll
9
causes air to flow through the inlet
3
i
, indoor heat exchanger
5
, and the orifice hole
12
. The sirocco fan
13
causes air to be drawn through the orifice hole
12
and flowed along a circumference thereof. The air flowed along the circumference is guided along a flow guide surface
9
g
and flows toward the discharge guide
11
e.
The description up to now is for the indoor side of the window type air conditioner, and hereafter the outdoor side of the window type air conditioner will be explained.
There is a motor
15
fitted on an outdoor side (rear side) of the air guide
7
for rotating the sirocco fan
13
and the fan
17
. The motor
15
has a rotating shaft projected in front and rear directions, one of which is passed through the air guide
7
, projected up to a center of the scroll
9
, and coupled with the sirocco fan
13
, and the other of which on the outdoor side is coupled with the fan
17
for drawing air from outside of the air conditioner and passed through the indoor heat exchanger
19
for heat exchange. The fan
17
has a ring
17
r
for connecting end edges of the blades. There is a fan shroud
18
fitted on the base pan
1
for guiding air flow from the fan
17
. The fan shroud
18
has a hole
18
′ in communication with the outdoor heat exchanger
19
. The outdoor heat exchanger
19
is fitted on an outside portion of the base pan
1
opposite to the fan shroud
18
. Though not shown, there are a compressor, an expansion valve, and the like, components of an air conditioning cycle, fitted to the outside portion. The different components of the air conditioner are enclosed by an outer case
20
which forms an outer cover of the air conditioner. For the window type air conditioner, the indoor portion is placed in a space for air conditioning and the outdoor portion is placed on the outside of the room.
The operation of the air conditioner will be explained.
Upon putting the air conditioner into operation, the air conditioning cycle comes into operation, and the motor
15
rotates the sirocco fan
13
as well as the fan
17
. According to this, room air is provided to the indoor heat exchanger
5
through the inlet
3
i
. The air undergoes a temperature drop as the air passes through the indoor heat exchanger and exchanges heat with the operation fluid. The air is then provided to the sirocco fan
13
through the orifice hole
12
. The air drawn into the sirocco fan
13
is guided along a circumferential direction of the sirocco fan
13
and discharged therefrom. Then, the air is guided along a flow guide surface
9
g
of the scroll
9
and provided to the discharge guide
11
e
. The low temperature air provided to the discharge guide
11
e
is discharged into the room through the discharge grill
3
e
. In the meantime, on the outdoor side, the operation for discharging heat from the operation fluid received from the indoor heat exchanger
5
is in progress. That is, external air drawn by the fan
17
is heat exchanged with the operation fluid as the air passes through the outdoor heat exchanger
19
, to discharge the heat to outside of the air conditioner.
However, the foregoing window type air conditioner has the following problems.
First, the related art window type air conditioner uses the sirocco fan
13
for drawing room air. The sirocco fan, designed for a high rate of air flow has numerous short blades, each curved opposite to a direction of rotation, requires the scroll
9
and an additional air guide for forming an air flow. This causes various problems. In particular, the air is discharged from the sirocco fan
13
in a circumferential direction throughout the flow guide surface
9
g
. Therefore, the air discharged to an upper stream of the flow guide surface
9
g
continues to flow along the flow guide surface
9
g
and is involved in a pressure build up as the air goes to a downstream, providing resistance to rotation of the sirocco fan
13
. Moreover, as the air is concentrated at the downstream portion of the flow guide surface
9
g
, the air flows partially to one side of the discharge guide
11
e
. At the end, the air discharge is not uniform throughout the discharge grill
3
e.
Second, the discharge guide
11
e
assembled on the air guide
7
and the scroll
9
is formed on the orifice
11
as one unit with the orifice
11
, requiring orifice
11
to be put into place after the air guide
7
and the scroll
9
are assembled, and requiring assembly of the discharge guide
11
e
and the air guide at the same time as assembly of the orifice
11
. Therefore, the assembly has been very inconvenient. Moreover, the unitized orifice
11
and discharge guide
11
e
puts many limitations on the formation of the orifice itself.
Third, the top-down fashion assembly of the orifice
11
puts limitations on the shape of the sirocco fan
13
, a counter part of the orifice
11
. In particular, the orifice
11
fitted in front of

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