A blowoff orifice is constituted by an upper wall, a lower wall and a vertical wind deflecting plate. The upper wall inclines so that a flow passage becomes narrow toward downstream and provided with a protrusion at its end portion. The lower wall has a horizontal linear portion on the downstream side and an end portion forming an acute angle at the tip of the linear portion. The vertical wind deflecting plate is provided between the upper wall and the lower wall, and capable of changing an airflow from a horizontal direction to a downward direction. The upper wall protrusion is located more downstream than the lower wall end portion.

BACKGROUND OF THE INVENTION 
1. Field of the Invention 
The present invention relates to the structure of a blowoff orifice for 
controlling blown-off air used for an air conditioning system and the 
like. 
2. Description of the Related Art 
FIG. 23 is a sectional view of a ceiling hanging type air conditioner 
disclosed in Examined Japanese Patent Publication No. 6-70519 showing the 
conventional blowoff orifice. In FIG. 23, reference numeral 1 denotes an 
air conditioner body whose interior is partitioned into a blower chamber 
52 and a heat exchanging chamber 53 by a partition plate 51. Within the 
blower chamber 52 are provided a fan casing 54 incorporating a blowoff 
orifice 2 and a sirocco fan (not shown) and a motor 6 for driving the fan. 
Within the heat exchanging chamber 53 are provided a heat exchanger 11 
supported by a side plate 55 (another side plate opposed thereto is not 
shown) and a drain pan 90 below the heat exchanger. On the front of the 
body 1, a blowoff orifice 30 provided with a wind deflecting device is 
arranged. The upper portion of the blowoff orifice 30 includes a ceiling 
plate 56 with its tip bent in a U-shape, a section material 57 bonded to 
the inner surface thereof and a biasing portion 58 fixed to the U-shaped 
wall. At a substantially central position in the blowoff orifice 30, a 
horizontal control plate 40 is provided both ends of which are swingably 
supported by the side plate 55 and the opposite side plate (not shown) and 
which has a vertical and horizontal rotary shaft in an air flowing 
direction. On the lower part of the blowoff orifice 30, a fluid guide 
plate 59 having a bending surface which is inclined downward as it goes 
downstream and whose longitudinal sectional surface is arc-shaped is 
attached to the side plates 55 (the opposite side is not shown). At the 
upstream end of the fluid guide 59, a damper 61 swingably supported on a 
supporting shaft 60 serving as a rotary shaft is provided. On the lower 
part of the heat exchanger 11, a bottom plate 62 on which a drain pan 90 
made of a heat insulator is placed is provided, and on the downstream side 
of the drain pan 90, a fluid guide wall 63 is provided which has a bending 
surface inclined downward as it goes downstream. The fluid guide wall 63 
and fluid guide plate 59 constitute an auxiliary blowoff orifice 50. The 
damper 61 is so adapted that it can open and close the auxiliary blowoff 
orifice 50. When the auxiliary blowoff orifice 50 is closed, the tip of 
the damper 61 abuts on the top of the fluid guide wall 63. The horizontal 
control plate 40 and the damper 61 are correlatively moved with each other 
so that when the horizontal control plate 40 swings downward, the damper 
61 opens and when the former swings horizontally, the latter closes. 
In the structure described above, at the time of horizontal blowoff, the 
horizontal control plate 40 is swung to be in a substantially horizontal 
position. Then, the damper 61 closes the auxiliary blowoff orifice 50 
interlocking with the swing of the horizontal control plate 40 so that the 
jet flow above the horizontal control plate 40 is blown off horizontally 
and that below the horizontal control plate 40 flakes off from the bending 
surface of the fluid guide plate 59 to merge with the jet flow above the 
horizontal control plate 40. The flow thus merged is blown off 
horizontally. 
At the time of downward blowoff, the horizontal control plate 40 is swung 
downward. Then, the damper 61 opens the auxiliary blowoff orifice 50 
interlocking with the horizontal control plate 40. As a result, the jet 
flow below the horizontal control plate 40 is applied to the bending 
surface of the fluid guide plate 59 by the Coanda effect and deflected 
downward, and the jet flow above the horizontal control plate 40 is merged 
with that below the horizontal control plate 40 by attraction so that it 
is deflected downward to blow off. Further, the jet flow below the damper 
61 is deflected downward by the fluid guide plate 59 and further deflected 
because of its application to the bending surface of the fluid guide wall 
63 by the Coanda effect. After it goes out from the auxiliary blowoff 
orifice 50, it attracts the jet flow above the fluid plate 59, resulting 
in the blowoff deflected downward in a wide angle. 
The drain pan 90 is molded by styrofoam, and held by plate metal so that it 
is fixed to the body. 
Since thermal contraction occurs in a cooling operation, the drain pan 90 
is deformed. 
Because of the structure of the blowoff orifice as described above, at the 
time of horizontal blowoff, the jet flow below the horizontal control 
plate flakes off from the bending surface of the fluid guide plate. 
Therefore, condensation occurs on the fluid guide plate in the cooling 
operation and dew falls in the room. 
The blowoff orifice cannot be closed by the horizontal control plate 
arranged at any position, and the auxiliary blowoff orifice appears always 
opened from the viewpoint of a user. This impairs the designing appearance 
of an air conditioner when it is not operated. 
In addition, provision of the damper and auxiliary blowoff orifice 
increases the number of manufacturing steps such as molding and assembling 
in the fabrication process. 
The conventional drain pan generates thermal contraction by heat exchange 
in the cooling operation, thus providing thermal deformation. 
SUMMARY OF THE INVENTION 
It is an object of the present invention to provide a blowoff orifice which 
has simple structure without using an auxiliary blowoff orifice equipped 
with a damper and can prevent condensation on a vertical wind deflecting 
plate and the blowoff orifice when these plates are set at any position, 
while maintaining the functions of downward and horizontal blowoff. 
It is another object of the present invention to provide a blowoff orifice 
having a structure which can prevent a drain recovery device from being 
thermally deformed. 
The blowoff orifice according to the present invention is comprised of: an 
upper wall inclined so that a flow passage becomes narrow toward 
downstream, the upper wall having a protrusion at an end portion thereof; 
a lower wall having a linear portion on the downstream side and an end 
portion forming an acute angle at the tip of the linear portion; and at 
least one vertical wind deflecting plate provided between the upper wall 
and the lower wall, the wind deflecting plate being capable of changing an 
airflow from a horizontal direction to a downward direction; wherein the 
upper wall protrusion is located more downstream than the lower wall end 
portion. 
This blowoff orifice according to the present invention can applied to not 
only the ceiling hanging type air conditioner device, but can be applied 
to a wall-hanging type, a cassette type, a floor type, a ceiling embedded 
type, a built-in VAV unit (duct air conditioning blowoff type) of air 
conditioner, and an air cleaner, a dehumidifier, a humidifier, an exhaust 
fan, arrange hood, a cooled air fan, a freezing/refrigerator, a showcase, 
a gas/oil fan heater, a clean heater, and the like. 
According to the present invention, during horizontal blowoff, the airflow 
having flowed along the upper wall at the upper part of the blowoff 
orifice is directed to the vertical wind deflecting plate by the 
protrusion at the end portion of the upper wall and flows along the 
vertical wind deflecting plate horizontally oriented so that it is not 
mixed with air outside the blowoff orifice. The airflow at the lower part 
goes straight along the linear portion of the lower wall and the acute 
angle portion at the tip of the lower wall surely separates the blown-off 
airflow from the air outside the blowoff orifice. Thus, the airflow in the 
horizontal direction can be surely obtained, and when cooled air is blown 
off from the blowoff orifice, condensation due to its mixing with air in a 
room does not occur at the wind deflecting plate and respective parts of 
the orifice. This makes it unnecessary to use sucking material. 
During downward blowoff, the blown-off airflow is deflected downward by the 
protrusion of the upper wall and flows along the vertical wind deflecting 
plate without being separated therefrom. Thus, the downward airflow can be 
obtained and when cooled air is blown off, no condensation occurs on the 
vertical wind deflecting plate. Further, since the end portion of the 
lower end is located more upstream than the protrusion of the upper wall, 
an airflow can be smoothly formed downward so that the downward airflow 
can be surely obtained.

PREFERRED EMBODIMENTS OF THE INVENTION 
Preferred embodiments of the present invention will be described as follows 
with reference to the accompanying drawings. 
Embodiment 1 
FIG. 1 is a perspective view of the body of a ceiling-hanging type air 
conditioner according to the present invention. FIG. 2 is a sectional view 
thereof. This body is an interior machine of the air conditioner which is 
connected to an exterior machine (not shown) in which a compressor, an 
expansion valve, a heat exchanger, a blower, etc., are mounted to carry 
out air conditioning. 
As shown in FIG. 2, the body includes a blower 6, a heat exchanger 11 and a 
control box 10. When the blower 6 operates, the indoor air taken from a 
sucking orifice 2 passes through the blower 6 and a wind passage 12 and 
heated or cooled by the heat exchanger 11 and supplied to an indoor room 
through a blowoff orifice 3. A sucking grill 7 and a filter 8 arranged in 
the sucking orifice 2 prevent dust in the room from flowing into the body. 
Dew produced in the heat exchanger when the heat exchanger is cooled is 
recovered by a drain water recovery plate 9 and discharged outdoors by a 
drain hose (not shown). 
The detailed structure of the blowoff orifice in the ceiling-hanging type 
air conditioner is shown in FIG. 3. As shown in FIG. 3, the blowoff 
orifice 3 consists of an upper wall, a lower wall and side walls. The 
blowoff orifice 3 is provided with a vertical wind deflecting plate 
swingably supported by a rotary shaft 17 and a horizontal wind deflecting 
plate 5 so that blown-off airflow can be deflected in an optimum 
direction. 
The control box 10 shown in FIG. 2 electrically carries out the control for 
the blower, vertical wind deflecting plate, etc., mutual control with the 
exterior machine and the transmission/reception control for a remote 
controller (not shown) 
Referring to FIG. 4, the blowoff orifice party will be explained in detail. 
FIG. 4 is a sectional view of the blowoff orifice when the vertical wind 
deflecting plate 4 is at rest. In this embodiment, the vertical wind 
deflecting plate 4 includes two plates 4a and 4b. 
The upper wall of the blowoff orifice has a curved surface 13 and a 
protrusion 14 at the tip. 
The drain water recovery plate 9 constituting the lower wall of the blowoff 
orifice has an arc shape portion 16 on the front side and a linear portion 
25 successive thereto. The tip 15 of the lower wall forms an acute angle. 
The details of shapes and location of the upper wall and lower wall be 
explained later. 
The operation of the vertical wind deflecting plates 4a, 4b will be 
explained. The vertical wind deflecting plates 4a, 4b swing about the 
rotary shafts 17a, 17b. When the vertical wind deflecting plates 4a, 4b 
are running, they rotate in a range from the position of horizontal 
blowoff in FIG. 5 to that of downward blowoff in FIG. 6. When the vertical 
wind deflecting plates 4a and 4b are at rest, it is at the position of 
FIG. 4. The vertical wind deflecting plates 4a, 4b at rest, which is 
arranged in a straight line or arc connecting the upper wall protrusion 14 
to the lower wall tip 15, can substantially block air blowoff. 
Accordingly, when the air conditioner is at rest, the interior of the body 
cannot be seen from the blowoff orifice. The body, therefore, appears 
simple and beautiful to improve the designing appearance greatly. Further, 
the vertical wind deflecting plates thus arranged can also reduce invasion 
of dust into the body and eliminate countermeasure against condensation in 
the room. The rotary shaft 17a, 17b are rotated by a motor (not shown) 
attached to it so as to swing the vertical wind deflecting plates 4a, 4b. 
In this case, two plates 4a, 4b may be controlled by individual motors or 
a motor by a linkage mechanism. 
During operation, the vertical wind deflecting plates 4a, 4b can be stopped 
also between the positions of FIGS. 5 and 6 through remote control 
operation according to a use's will. 
The shape of each of the upper wall and lower wall will be described in 
detail. 
The protrusion 14 of the upper wall, when the vertical wind deflecting 
plates 4a, 4b are at the position shown in FIG. 5, provides an interval 
.beta. between the vertical wind deflecting plate 4a and the tip of the 
protrusion. The optimum value of .beta., which depends on the speed of 
wind passing through this portion, amount of blowing wind, and the 
arrangement of the blower and heat exchanger, is 5-20% of the size (x in 
the figure) of an opening of the blowoff orifice. 
The optimum height a of the protrusion 14, which should be a necessary and 
minimum value in order to suppress the pressure loss of the air in the 
blowoff orifice, is 5-10% of the size of an opening of the blowoff 
orifice, particulary in a case of dowing blowing as shown in FIG. 6. This 
is because in order to cause an airflow to flow along the vertical wind 
deflecting plate 4a, a downward vector must be produced to assure the flow 
speed to reach the vertical wind deflecting plate 4a. 
The width of the protrusion 14 is basically equal to that of vertical wind 
deflecting plates 4a, 4b to prevent condensation on the vertical wind 
deflecting plates 4a, 4b, but may be slightly varied in a range enough to 
prevent the condensation. It may have a gap of 3.0-20 mm from both ends of 
the blowoff orifice as shown in FIG. 3. Since the wall edge of the blowoff 
orifice, where the wind speed is slow, is apt to involve the air in the 
room, the presence of the gap is effective to increase the wind speed so 
that the airflow flows along the wall, thereby preventing the 
condensation. 
The protrusion 14 is located at the position more front than the tip 18a of 
the upper vertical wind deflecting plate 4a and more rear than the tip 19a 
on the opposite side. 
The shape extending to the protrusion 14 may be an S-shape or arc curved 
shape or linear shape which makes the flow passage narrow as it goes 
downstream as shown in FIG. 6. 
The tip 15 of the lower wall is located at the position (body side) more 
rear than the tip 19b of the vertical wind deflecting plate 4b on the 
lower wall side in FIG. 6. 
The line extending from the protrusion 14 to the tip 15 of the lower wall 
forms an angle (.psi. in FIG. 4) within 10.degree. to 90.degree. with a 
vertical line. 
The portion 16 of the lower wall may be either linear or curve as long as 
the linear portion is provided in FIG. 6. If the drain water recovery 
plate is not required, a single surface may be provided. 
The airflow around the blowoff orifice will be explained. 
First, referring to FIG. 7, an explanation will be given of the horizontal 
blowoff. 
The airflow at the upper portion of the blowoff orifice flows along the 
curved surface 13 is directed downward by the protrusion 14, and flows 
along the upper side of the vertical wind deflecting plate 4a. The wind 
passage forms a curve like the curved surface 13 so that the airflow flows 
with no bubbles generated there, thus preventing loss of the blowoff 
pressure from being increased. The protrusion 14 directs the airflow to 
the vertical wind deflecting plate 4a to form the horizontal airflow along 
the vertical wind direction plate 4a, thereby preventing the air 
(secondary air) in the room from flowing into the wind passage. Thus, the 
secondary air and blown-off air are mixed with each other so that cooling 
operation can be carried out with no condensation. 
The airflow goes surely to the vertical wind deflecting plate 4a. 
Therefore, by maintaining the vertical wind deflecting plates 4a, 4b 
horizontally, the cooled air during the cooling is blown upwards in the 
room so that the room temperature can be reduced with a user not directly 
exposed to the cooled air. This greatly improves sense of comfort. 
The airflow on the lower side of the blowoff orifice flows along the curved 
face 16 and the linear segment 25 and goes straight into the room from the 
tip 15 (arrow 20 in FIG. 7). Then, as shown in FIG. 8A, the air in the 
room and the blown-off air are surely separated at the tip 15 of the 
blowoff orifice. If the tip forms a curved shape as shown in FIG. 8B, the 
blown-off air forms bubbles like 20b and is hence mixed with the air 21b 
in the room, thus providing condensation on the curved face or within the 
wind passage during cooling. 
Accordingly, the upper and lower shapes of the blowoff orifice prevents 
condensation during cooling, necessitates no suction material and greatly 
reduces the production cost. 
Referring to FIGS. 9A and 9B, an explanation will be given of the airflow 
during downward blowoff. 
In FIG. 9A, the airflow passing the upper portion of the blowoff orifice is 
directed downward by the protrusion 14 at the tip of the blowoff orifice 
and flows along the upper face of the vertical wind deflecting plate 4a 
(see 22a in FIG. 9). Then, vertically overlapping the protrusion 14 the 
tip of the vertical wind deflecting plate 4a as shown in the figure 
promotes the above effect. With no protrusion, the airflow passing the 
upper side of the vertical wind deflecting plate 4a goes straight as shown 
in FIG. 9B. This reduces the amount of wind flowing downwards, thus 
leading to a disadvantage that the airflow does not reach the floor, 
particularly in home heating. In air-cooling, air in the room flows onto 
the upper surface of the vertical wind deflecting plate 4a (see 23b in 
FIG. 9) so that a temperature difference occurs between both sides of the 
vertical wind deflecting plate 4a, thus giving rise to condensation. 
The present invention has solved the above two problems by passing the air 
both faces of the vertical wind deflection plate 4a using the protrusion 
14 shown in FIG. 9. 
The inclination within 10.degree. to 90.degree. (.psi. in FIG. 4) of the 
protrusion 14 of the upper portion of the blowoff orifice and the tip 15 
of the lower portion thereof makes it possible to cause more airflow to 
flow downward. This makes it possible to blow warm wind from the user's 
feet particularly during heating. Further, the tip of the upper wall is 
located more downstream than that of the lower wall so that the pressure 
loss at the time of downward blowoff is small enough to assure sufficient 
amount of wind and low noise. 
When air is blown downward, as shown in FIG. 6, since the protrusion 14 on 
the upper wall is located more front than the tip 18a of the upper 
vertical wind deflecting plate 4a on the upper side and the tip on the 
lower wall is located more rear than the lower vertical wind deflecting 
plate 4b, the downward airflow can be easily produced, and hence assured. 
The same effect as described above can be also obtained by the similar 
structure of the upper wall tip instead of the protrusion 14 on the upper 
wall. 
Also in the case of one sheet of the vertical wind deflecting plate, the 
above relationship between the upper tip and lower tip of the vertical 
wind deflecting plate leads to the same effect. 
In the above first embodiment, the blowoff orifice according to the present 
invention is applied to a ceiling hanging type air conditioner. The 
blowoff orifice according to the present invention is not limited to the 
ceiling hanging type air conditioner device, but may be applied to a 
wall-hanging type, a cassette type, a floor type, a ceiling embedded type, 
a built-in VAV unit (duct air conditioning blowoff type) of air 
conditioner, and an air cleaner, a dehumidifier, a humidifier, an exhaust 
fan, arrange hood, a cooled air fan, a freezing/refrigerator, a showcase, 
a gas/oil fan heater, a clean heater, etc. 
It is of course that the blowoff orifice according to the second to sixth 
embodiments can be applied to a wide variety of devices. 
Embodiment 2 
FIG. 10 is a sectional view showing the blowoff orifice during 
non-operation according to this embodiment. Referring to FIG. 10, an 
explanation will be given of an embodiment as to a single vertical wind 
deflecting plate 4. 
Since this embodiment is the same as the first embodiment in the basic 
arrangement, operation and effect, only differences will be explained. 
The optimum height (.alpha. in the figure) of protrusion 14 at the tip of 
the upper wall is 10-40% of the size (x in the figure) of an opening of 
the blowoff orifice. In the case of a single vertical wind deflecting 
plate, as compared to the case of double vertical wind deflecting plates, 
the distance between the upper wall and the upper surface of the vertical 
wind deflecting plate is long. Accordingly, the protrusion 14 is made 
relatively high. 
As shown in FIG. 11, in the case of downward blowoff, the angle of the 
vertical wind deflecting plate 4 and the size of the protrusion 14 are so 
set that the tip 18 of the vertical wind deflecting plate 4 is located at 
a position more upper than the tip of the protrusion 14. This 
configuration causes the airflow to flow surely along the upper surface of 
the vertical wind deflecting plate 4. 
The curved portion 13 of the upper wall has radii r1 and r2 of curvature in 
an S-shape. The size of curvature is desired to be r1&gt;r2. A small value of 
r1 results in abrupt squeezing of the flow passage, which increases 
pressure loss and reduces the amount of wind. A small value of r2 makes 
the protrusion 14 upright, thus giving the airflow a downward vector. In 
this embodiment, the ratio of r1 and r2 is 4:1. Incidentally, it is 
necessary that the relation of r1 and r2 should be r1&gt;r2 in this case. 
The effect of the horizontal blowoff is the same as in the first 
embodiment. 
In the case of downward blowoff, with the upper wall having a shape as 
shown in FIG. 13, when the vertical wind deflecting plate 4 intends to 
close the blowoff orifice during non-operation in order to improve the 
designing appearance, the vertical wind deflecting plate 4 is large 
scaled, thereby increasing torque required for driving. Further, as 
described in connection with the first embodiment, in downward blowing, 
since the tip of the upper wall is more front than upper tip of the 
vertical wind deflecting plate and the tip of the lower wall is more rear 
than the lower tip of the vertical wind deflecting plate, FIG. 13 shows a 
configuration which is likely to make a downward airflow. In particular, 
where the vertical wind deflecting plate is single as in the configuration 
shown in FIG. 13, it is large-scaled. In the downward blowoff, therefore, 
the airflow 22 is separated from the vertical wind deflecting plate as in 
FIG. 13 so that the wind amount of the downward airflow is apt to be 
reduced, and particularly in home-heating, the airflow is hard to reach 
the floor. In cooling, since the air in the room is brought into contact 
with the upper surface of the vertical wind deflecting plate. This 
provides a temperature difference between both surfaces of the vertical 
wind deflecting plate, thus leading to condensation. 
In order to solve these problems, the blown-off airflow must form a flow 
along the front surface of the vertical wind deflecting plate 4. 
Particularly, where the vertical wind deflecting plate 4 is single, since 
its size is large, the amount of airflow passing the upper surface of the 
vertical wind deflecting plate 4 must be increased. Where there is little 
airflow, the airflow must be separated on the way of the vertical wind 
deflecting plate 4. 
In this embodiment, as shown in FIG. 12, the upper wall in the form of an 
S-shape provides a long distance between the vertical wind deflecting 
plate 4 and the upper wall, thereby increasing the amount of wind passing 
the upper surface of the vertical wind deflecting plate 4. The protrusion 
14 at the tip makes a downward flow so that the airflow along the vertical 
wind deflecting plate 4 is formed. 
Thus, even where the vertical wind deflecting plate 4 is single, the amount 
of downward wind is assured, particularly, the airflow is caused to reach 
the floor in the room in home heating, thereby greatly improving sense of 
comfort. In addition, the orientation of the upper and lower walls and the 
vertical wind deflecting plate 4 can reduce pressure loss in the downward 
blowoff to assure the amount of wind and reduce noise. 
Setting the vertical wind deflecting plate 4 at any angle from horizontal 
blowoff to downward blowoff does not lead to condensation on the vertical 
wind deflecting plate or wind passage. This necessitates water no sucking 
material, thus reducing the production cost. 
In addition, for the purpose of substantially closing the discharge orifice 
during non-operation, the upper wall is provided with the protrusion 14 
which is slightly larger than in the first embodiment so that the vertical 
wind deflecting plate 4 can be miniaturized. The horizontal blowoff and 
downward blowoff is formed by the shape of the upper wall and lower wall 
so that the designing appearance during non-operation is improved without 
deteriorating the inherent function. 
Embodiment 3 
This embodiment is directed to the case where the airflow is supplied more 
downward in the first and second embodiments and no condensation will be 
provided in cooling. 
As shown in FIG. 14, the linear portion of the lower wall is set at an 
angle .theta. of 15.degree. from the horizontal line towards the 
downstream side so as to be tangent to an arc 16. The preferable angle 
.theta. is from 7.degree. to 20.degree.. Further, as shown, a thin plate 
(hereinafter referred to as "rectifying plate") 24 made of plastic or 
metal is arranged at a position apart from the arc by 5-10 mm. In order to 
reduce the pressure loss of the blown-off wind, the plate must have the 
smallest thickness which is not deformed. The length of .gamma., which 
depends on the size of the installed blowoff orifice, may be 15 mm. The 
longitudinal length thereof is desired to be equal to that of the blowoff 
orifice. Incidentally, the inclination angle of the rectifying plate 24 
with respect to the linear segment 25 is from 0.degree. to 10.degree.. 
As shown in FIG. 14, during non-operation, the vertical wind deflecting 
plates 4a, 4b are arranged to close the front surface of the blowoff 
orifice substantially. As shown in FIG. 15, during the downward blowoff, 
the vertical wind deflecting plate 4 swings to the position as shown. 
Then, the linear portion is more inclined than in the embodiments 
described above so that the distance of .delta. is increased. Since the 
pressure loss at this portion is low, the airflow is supplied downwards 
along the vertical wind deflecting plate 4b and inclined lower wall as 
shown in FIG. 16A. 
Then, the airflow is guided so as to flow surely along the lower wall by 
the rectifying plate in parallel to the linear portion inclined downwards. 
With no rectifying plate, the airflow is separated on the lower wind 
deflecting plate 4b as shown in FIG. 16B and goes straight. As a result, 
the airflow deflected downward by the vertical wind deflecting plate 4b is 
pushed back. 
In this way, since the shape 25 of the lower wall is inclined and the 
rectifying plate are arranged, the airflow can be blown more downward. In 
this embodiment, the blowing angle in the down direction in the case where 
the linear portion is horizontal is improved from 65.degree. (in the first 
and second embodiments) to 70.degree.. 
An application of the blowoff orifice according to this embodiment to an 
air conditioner device permits the airflow to be blown to reach the floor. 
Particularly, in home-heating, a comfortable space of keeping the head 
cool and the feet warm can be formed. 
During the horizontal blowoff, the airflow in the vicinity of the lower 
wall flows to spread as shown in FIG. 17. Because of the rectifying plate, 
the blown-off airflow flows also along the lower wall. No condensation 
during cooling occurs. 
Incidentally, the linear portion of the lower wall is inclined by 
15.degree. or so from the horizontal line. If the angle is too large, 
during the horizontal blowoff, secondary air intrudes which is not 
preferable. 
This embodiment, which has been explained on the case where the vertical 
wind deflecting plate 4 is double, has the same effect as in the case it 
is single. 
Embodiment 4 
This embodiment is an example for directing the airflow more downward. 
When the blowoff orifice is substantially closed during non-operation 
stopping as shown in FIG. 10, during the downward blowoff as shown in FIG. 
12, the vertical wind deflecting plate 4 swings so that its tip is located 
more upper than the horizontal linear portion 25 of the lower wall. 
The airflow goes straight as indicated by an arrow and pushes back the 
downward airflow along the vertical wind deflecting plate 4. 
Since a protrusion 26 is provided on the linear portion of the lower wall 
as shown in FIG. 18 in order to direct the airflow in the vicinity of the 
lower wall once upward and direct it downward again by the vertical wind 
deflecting plate 4, the airflow is greatly deflected downward to flow 
without being pushed back. The tip of the vertical wind deflecting plate 4 
should be located above or be flush with the tip of the vertical wind 
deflecting plate 4. In this embodiment, the blowing angle in the case 
where the linear portion is horizontal is improved from 65.degree. (in the 
first and second embodiments) to 70.degree.. 
Thus, since the airflow can be directed greatly downward, the body 
installed at a high position permits the airflow to be blown to reach the 
floor. Particularly, in home heating, comfort can be improved. 
In accordance with this embodiment, as in the embodiments described above, 
during non-operation the designing appearance is not impaired, and during 
cooling, no condensation occurs at any installation of the vertical wind 
deflecting plate, thus necessitating no sucking material. 
Embodiment 5 
An explanation will be given of the shape of the right and left ends of the 
blowoff orifice. FIG. 19 is a perspective view of the left end of the 
blowoff orifice according to this embodiment. The horizontal wind 
deflecting plate is not shown. Protrusions are formed on the upper and 
lower walls, and the vertical wind deflecting plate is swingably supported 
by a rotary shaft 17. 
FIG. 20 is a section view of A--A section in FIG. 19. In this drawing, 
reference numeral 5 designates a horizontal wind deflecting plate. The 
shape of the left end is composed of a small arc of an outside wall 41 and 
a large arc of a blowoff orifice side wall 42. The connecting portion has 
an edged shape. The blowoff orifice side 42 may be linear and may not be a 
shape expanding the wind passage. The vertical wind deflecting plate 4 and 
the left end of each of the protrusions are desired to be apart by 0 to 20 
mm from the left end wall. This applies to the rectifying plate. 
The airflow will be explained below. Now it is assumed that the horizontal 
wind deflecting plate 5 is inclined in a direction opposite to the left 
wall as shown in the drawing. The airflow flows along the left wall while 
it spreads. The blown-off airflow flows along the wall in the vicinity of 
the wall by the Coanda effect, goes straight from the edge portion, and 
flows into a room space. Then, the room air flows along the outside of the 
left wall. Then, the room air flows along the outside of the left wall, 
but the blown-off airflow is not mixed with the room air flow since the 
flowing speed of the blown-off airflow is high, and goes forwards from the 
edge portion. If the blowoff orifice side wall 42 is formed of a small 
arc, the blown-off airflow will be separated from the wall because of the 
speed and mixed with the room air. The outside wall 41 may have the shape 
with any size as long as the room air at a low speed is not separated, but 
in many cases, it has a small arc considering the designing appearance. 
As an application of this embodiment, the left end of the blowoff orifice 
may be provided with a protrusion 43 at the end tip to provide the same 
effect. The protrusion 43 may be integrally molded or bent as a separate 
piece. 
If the vertical wind deflecting plate 4 and the left end of each of the 
protrusions on the upper and lower walls are arranged apart from the left 
end wall, the amount of wind flowing along the end portion increases so 
that mixing of the blown-off airflow with the room air can be suppressed 
more greatly. 
The right side may have a shape symmetrical to that in FIGS. 20 and 21. 
Thus, since the amount of the blown-off airflow at the right and left walls 
is increased and mixing of the blown-off airflow and room air is prevented 
by the shape of the wall, condensation at the end of the blowoff orifice 
during cooling and humidification can be prevented, thereby necessitating 
no sucking material and reducing the production cost. 
Embodiment 6 
FIG. 22 is a sectional view of the blowoff orifice according to this 
embodiment. 
In FIG. 22, reference numeral 46 denotes a drain recovery device of 
styrofoam which constitutes the lower wall of the blowoff orifice. The 
drain recovery device 46 is constructed in such a manner that an 
attachment plate 45 for a horizontal wind deflecting plate holder 44 is 
integrally insertion-molded and the horizontal wind deflecting plate 
holder 44 is bolted to or hung on the attachment plate 45. 
In the structure according to this embodiment, the horizontal wind 
deflecting holder attachment 45 serving as a reinforcement material is 
embedded in the substantially entire area in a longitudinal direction of 
the drain recovery device. For this reason, the drain recovery device 
which has produced thermal contraction during cooling running can surely 
maintain the present form without being deformed because of embedding of 
the reinforcement material. 
In the blowoff orifice according to the present invention, during 
horizontal blowoff, the airflow having flowed along the upper wall at the 
upper part of the blowoff orifice is directed to the vertical wind 
deflecting plate by the protrusion at the end portion of the upper wall 
and flows along the vertical wind deflecting plate horizontally oriented 
so that it is not mixed with air outside the blowoff orifice. The airflow 
at the lower part goes straight along the linear portion of the lower wall 
and the acute angle portion at the tip of the lower wall surely separates 
the blown-off airflow from the air outside the blowoff orifice. Thus, the 
airflow in the horizontal direction can be surely obtained, and when 
cooled air is blown off from the blowoff orifice, condensation due to its 
mixing with air in a room does not occur at the wind deflecting plate and 
respective parts of the orifice. This makes it unnecessary to use sucking 
material. 
During downward blowoff, the blown-off airflow is deflected downward by the 
protrusion of the upper wall and flows along the vertical wind deflecting 
plate without being separated therefrom. Thus, the downward airflow can be 
obtained and when cooled air is blown off, no condensation occurs on the 
vertical wind deflecting plate. Further, since the end portion of the 
lower end is located more upstream than the protrusion of the upper wall, 
an airflow can be smoothly formed downward so that the downward airflow 
can be surely obtained. 
In the blowoff orifice according to the present invention, the linear 
portion of the lower wall is inclined downward toward downstream and a 
rectifying plate is arranged in the vicinity of the lower wall, the 
airflow rectified by the rectifying plate during the downward blowoff has 
a downward vector and flows along the inclined linear portion of the lower 
wall. Thus, it does not obstruct and merges with the airflow deflected 
downward by the vertical wind deflecting plate. For this reason, as 
compared with the first blowoff orifice, the airflow can be blown more 
downward so that the airflow can be blown toward immediately below the 
blowoff orifice. 
In the blowoff orifice according to the present invention, the same 
downward airflow as in the second blowoff orifice is obtained in such a 
manner that the airflow in the vicinity of the lower wall is once directed 
upward in a control range of the vertical wind deflection plate by the 
protrusion provided at the horizontal linear portion of the lower wall, 
and then is directed downward to merge with the airflow from above without 
obstructing it. 
Such a manner permits the airflow to be blown immediately below the blowoff 
orifice without increasing the number of components. 
The blowoff orifice according to the present invention, in which when the 
airflow is blown off downward by the vertical wind deflecting plate, the 
end portion of said vertical wind deflecting plate nearest to the upper 
wall is located more upstream than the protrusion of said upper wall and 
that of said vertical wind deflecting plate nearest to the lower wall is 
located more downstream than the end portion of said lower wall, in 
addition to the effects of the invention described above, permits the 
downward airflow to be easily formed and assured more surely. 
The blowoff orifice according to the present invention, which is structured 
to be substantially closed during non-operation, in addition to the 
effects of the invention described above, can prevent dust from invading 
an orifice body during non-operation and improve the designing appearance 
without impairing the function of the orifice. 
In the present invention, since an air conditioner is provided with the 
blowoff orifice defined above, during cooling, condensation at the 
respective parts is prevented, and during home-heating, sufficient 
downward airflow is obtained to reach the floor so that a comfortable 
space of keeping the head cool and the feet warm can be formed. 
The blowoff orifice according to the present invention has a structure that 
it comprises an upper wall, a lower wall, and a vertical wind deflecting 
plate provided between said upper wall and said lower wall and capable of 
changing an airflow from a horizontal direction to a downward direction, 
and an end portion of said upper wall is located more downstream than an 
end portion of said lower wall, and when the airflow is blown off downward 
by the vertical wind deflecting plate, the end portion of said vertical 
wind deflecting plate nearest to the upper wall is located more upstream 
than the end portion of said upper wall and that of said vertical wind 
deflecting plate nearest to the lower wall is located more downstream than 
the end portion of said lower wall. For this reason, a downward airflow 
can be easily produced so that the downward airflow can be assured. In 
addition, the blowoff orifice has also a structure that the wind passage 
resistance in a blowoff direction when an airflow is blown downward can be 
suppressed so that reduction in wind amount during downward blowoff and 
sound of wind blowing can be suppressed. 
The blowoff orifice according to the present invention has a structure in 
which a protrusion is provided at the end potion of the upper wall. For 
this reason, in addition to the effect of the invention described above, 
during horizontal blowoff, the airflow having flowed along the upper wall 
at the upper part of the blowoff orifice is directed to the vertical wind 
deflecting plate by the protrusion at the end portion of the upper wall 
and flows along the vertical wind deflecting plate horizontally oriented 
so that it is not mixed with air outside the blowoff orifice. Thus, the 
airflow in the horizontal direction can be surely obtained, and when 
cooled air is blown off from the blowoff orifice, condensation due to its 
mixing with air in a room does not occur at the wind deflecting plate and 
respective parts of the orifice. This makes it unnecessary to use sucking 
material. 
During downward blowoff, the blown-off airflow is deflected downward by the 
protrusion of the upper wall and flows along the vertical wind deflecting 
plate without being separated therefrom, Thus, the downward airflow can be 
obtained and when cooled air is blown off, no condensation occurs on the 
vertical wind deflecting plate. 
The blowoff orifice according to the invention has a structure that in the 
invention, the lower wall has a horizontal linear portion and an end 
portion with an acute angle. For this reason, in addition to the effects 
of the above inventions, during the horizontal blowoff, the airflow at the 
lower part goes straight along the linear portion of the lower wall and 
the acute angle portion at the tip of the lower wall surely separates the 
blown-off airflow from the air outside the blowoff orifice. Thus, the 
airflow in the horizontal direction can be surely obtained, and when 
cooled air is blown off from the blowoff orifice, condensation due to its 
mixing with air outside the blowoff orifice can be prevented on the lower 
part of the orifice. This makes it unnecessary to use sucking material and 
others. 
The air conditioner according to the invention is provided with a blowoff 
orifice defined by the invention. For this reason, during cooling, 
condensation at the respective parts can be prevented, thus making it 
unnecessary to use sucking material and others. 
The sufficient downward airflow can be obtained and particularly in 
home-heating, comfortable environment can be obtained. 
The invention has a structure in which the front surfaces of right and left 
ends of said blowoff orifice are formed in two arc shapes in such a way 
that the front surface on the side of the blowoff orifice is formed in a 
large arc shape or linear shape, the external front surface of an orifice 
body is formed in a small arc shape and a portion connecting these arc 
shapes is edge-shaped. For this reason, the blown-off air is not separated 
from the wall but goes forward from the edge-shaped portion. Thus, it does 
not merge with air in a room at the right and left ends of the blowoff 
orifice so that condensation during cooling can be prevented there, thus 
making it unnecessary to use sucking material and others. 
In the invention, the lower wall of the lower wall is formed of a drain 
recovery device made of synthetic resin in which a reinforcement material 
serving as a component attachment stand is embedded. For this reason, 
thermal deformation of a drain pan can be prevented, thus improving 
reliability. Since the reinforcement member serves as a component 
attachment stand, for example, a horizontal wind deflecting plate and 
others can be easily attached.