JPS5822013Y2 - Terminal air conditioner - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of a terminal air conditioner.

In recent years, air conditioning systems have become more efficient due to reductions in blower power, miniaturization of air conditioners, reductions in equipment costs and installation space, simplification of control equipment, reduction in duct space, and associated reduction in insulation materials. In order to achieve a reduction in the cost of the conditioner and its operation, it has been proposed to keep the required amount of conditioned air per unit floor area constant and to increase the heat capacity per unit amount of conditioned air several times.

According to this, for example, indoor air conditions in the summer have a dry bulb temperature of 2
In the case of 6℃ and relative humidity of 50%, the heat capacity of the dry bulb temperature of 5℃ and relative humidity of 90% is supplied as conditioned air. However, if low-temperature conditioned air is supplied indoors under these conditions, the air exposed indoors will be The diffuser itself is cooled by conditioned air, and the indoor air in contact with the air diffuser has a dew point temperature of 14.5.
℃, condensation and water droplets will form on the surface of the air diffusion equipment, staining the ceiling surface, causing inconvenience to residents by dripping, and staining equipment, furniture, and products. A problem arises.

To solve this problem, mix indoor air with low-temperature conditioned air at a certain ratio just before entering the room, and use this mixed blown air as
By adjusting the dry bulb temperature to 17.6 degrees and the relative humidity to 67 degrees, condensation will not occur in the indoor air diffuser.

As a means for this purpose, as shown in FIG. As shown in FIG. 1, a second device B1 attracts and mixes room air from the induction port 6 with an air flow blown from the blow-off nozzle 4 toward the blow-off port 5, or as shown in FIG. It is conceivable to use a third device C or the like that attracts indoor air from the gap 8 and mixes it with an air flow blown from the This type has the advantage of having a relatively long mixing path between the indoor air and indoor air, but since the air is blown directly to the air outlet, the mixing effect is not sufficient, and the air outlet is embedded in the ceiling. This increases the height inside the ceiling, which is disadvantageous in terms of construction.Furthermore, although the third device C is an embedded type, the mixing passage is short, which is disadvantageous, and furthermore, the arrangement of the air outlet and the gap makes it difficult to install. , which is not practical as it causes a so-called short pass.

This idea was made in order to solve the above-mentioned conventional problems, and consists of a long horizontal passage parallel to the ceiling surface and a large curvature curved from the tip of the horizontal passage that opens into the room. The terminal air conditioning duct has a curved passage, and both passages of the duct are vertically partitioned by a partition wall to form a mixed air blowing passage and an indoor air induction passage, and the curved passage of the mixed air blowing passage is In addition to installing an air outlet in the opening,
An air inlet is installed adjacent to and integrated with the air outlet at the opening of the curved passage of the indoor air induction passage, while a large number of air inlets are installed at the rear of the horizontal passage of the mixed air outlet to blow out low-temperature conditioned air at high speed. An injection box having injection holes of This is how it was done.

Hereinafter, embodiments of this invention will be described in detail with reference to the accompanying drawings.

As shown in FIGS. 2, 3, and 4, the terminal air conditioner 10 includes a long horizontal passage section 12 that extends in parallel above the ceiling surface 11, and a distal end of the horizontal passage section 12. An air terminal having a short curved passage section 14 that curves from the side with a large curvature and opens into the interior 13, and a closed box-shaped box storage section 15 that bulges upward from the rear end of the horizontal passage section 12. A harmonizing duct 10 is provided.

Both passage portions 12.14 of the duct 15 are partitioned into upper and lower parts almost equally by a partition wall 16, forming a mixed air blowing passage 17 in the upper part and an indoor air induction passage 18 in the lower part.

The rear end side of the partition wall 16 is bent toward the box storage part 15 so as to form a narrow part 19 with the indoor air induction passage 18 and a wide part 20 with the mixed air blowing passage 17. A flow port 21 for induced air is provided between the rear end portion and the rising wall 15a of the box storage portion 15.

A heat insulating material is pasted on the inner surfaces of both passages 12 and 14, the box storage part 15, and both sides of the partition wall 16 to improve sound deadening and heat insulation effects.

At the opening of the curved passage section 14 of the mixed air blowing passage 17,
An air outlet 22 that coincides with the ceiling surface 11 is attached, and an air inlet 23 is attached adjacent to and integrated with the air outlet 22 at the opening of the curved passage section 14 of the indoor air induction passage 18.

The air outlet 22 and the air suction port 23 are provided with blades 24 such that the blowing direction and the suction direction are opposite to each other.

Note that the air outlet 22 and the air suction port 23 are not limited to those in the above embodiments, but may be appropriately shaped such as a bread type or a multi-cone type.

The box storage section 15 is accessed from the outside by the rising wall 1.
5a, a number of injection nozzle holes 26.・・・
An injection box 27 is disposed with 26 facing the inlet side of the mixed air blowing passage 17, and a duct 28 for supplying low-temperature conditioned air is connected to the outer end of the injection box 27.

The injection nozzle hole 26 for the injection box 27,...
, 26 are provided in two rows, upper and lower, at relatively small intervals, so that the jet airflow covers the entire width of the mixed air blowing passage 17.

Inside the injection box 27, there is a constant air volume automatic control that automatically maintains a predetermined value of air volume for an arbitrarily selected predetermined amount regardless of the wind pressure fluctuation of the low temperature conditioned air that is pumped through the box 27. A mechanism 29 is provided.

As shown in FIG. 5, the constant air volume automatic control mechanism 29 is centered around a slide shaft 34 which is supported in the center of the box 27 via a spring 31, 32 and slidably in the axial direction by a bearing member 33, 33. As, each joint 35 between two guide plates 35, 35 and two pressure receiving plates 36, 36 symmetrically on both sides
a and 36a are hinged to form a substantially rhombic shape that can be expanded and contracted in the direction perpendicular to the slide shaft 34, and
Both guide plates 35, 35 and both pressure plates 36, due to the expansion action of the pressure plates 36, 36 and the restoring elasticity of the springs 31 and 32,
36 and the inner surface of the box 27 are balanced and a predetermined air volume is maintained.

The cross-sectional relative size ratio of each part of the terminal air conditioner 10 is as follows:
Injection nozzle hole 26. ..., 26 as a reference, the passage length of the mixed air blowing passage 17 is preferably 5D to IOD.

In addition, the injection nozzle hole 26. ..., the overall shape of 26 is
The cross-sectional area of the mixed air blowing passage 17 and the injection nozzle hole 26.
..., determined by the ratio of the effective cross-sectional area of 26 to the effective cross-sectional area of
20, and the cross-sectional area of the blowout passage 17 is preferably 1.5D to 2.5D with respect to the apparent jet width.

Further, it is preferable that the flow port 21 is about 3D.

Further, the outermost curvature of the horizontal passage section 12 and the curved passage section 14 of the mixed air blowing passage 17 is preferably about 1.5D to 3D in order to ensure smooth flow of the blowing air.

Note that it is desirable that the internal curvature of the partition wall 16 be as large as possible.

If the terminal air conditioner 10 is configured as described above, now,
Low-temperature conditioned air (dry bulb temperature: 5°C, relative humidity: 90%) is supplied from the duct 28 into the injection box 27, and after being controlled to a predetermined air volume by the constant air volume automatic control mechanism 29, the air is passed through the injection nozzle hole 26. ..., 26 toward the mixed air blowing passage 17, the injection energy forms a sufficient pressure film in the long mixed air blowing passage 17 to create a negative pressure in the indoor air induction passage 18. .

This combination maintains the basic shape of the ejector and is set to provide the best ejector effect.

The indoor air induction passage 18, which has become under negative pressure, has an air suction port 2.
Room air is introduced from the partition wall 1.
6 is slightly narrowed at the rear end side, and is turned back to the side of the mixed air blowing passage 17 through the circulation port 21 to form the injection nozzle hole 2.
6. . . , 1 to 2 times the amount of low-temperature conditioned air injected from 26 is mixed, and after being sufficiently mixed and stirred in the long blowout passage 17, the dry bulb temperature is 17.6°C and the relative humidity is 67
The air is blown out from the air outlet 22 into the room 13 in a well-controlled manner.

As a result, since the dew point temperature of the indoor air is 14.5° C., there is no fear of condensation at the air outlet 22.

As is clear from the above explanation, this invention has an automatic constant air volume control device, and has a long horizontal passage section and a curved passage section in which the mixed air blowing passage and the indoor air induction passage are adjacent to each other. Since it is a terminal air conditioner connected to an integrated air outlet and intake port, the device can be easily installed in the ceiling.
Problems such as the location of the blow-off suction opening can be solved, and the indoor air drawn by the injection force of the low-temperature conditioned air injected from the injection box can be sufficiently mixed with the low-temperature conditioned air in the long mixed air blowout passage. After mixing and agitating, this terminal air conditioner blows into the room from the air inlet and adjacent air outlet, so the mixed and blown air can be adjusted so that no condensation occurs, and the ceiling surface soil the
No more dripping.

Therefore, it is possible to use low-temperature conditioned air with a heat capacity of a dry bulb temperature of 5°C and a relative humidity of 90 parts.As a result, it is possible to reduce the blower power, downsize the air conditioner, etc., and reduce equipment and operation. It becomes possible to reduce air conditioning costs including

Furthermore, the constant air volume automatic control device of the terminal air conditioner of this invention is equipped with an actuator that responds to compressed air or electric input, and changes indoor temperature according to instructions from a temperature sensor installed in the indoor air induction passage. By controlling the low-temperature conditioned air from the nozzle injection box in accordance with .

[Brief explanation of the drawing]

Figure 1 a1 Figure 1 S and Figure 1 C are longitudinal sectional views of a conventional terminal air conditioner, Figure 2 is a longitudinal sectional view of the terminal air conditioner according to this invention, and Figure 3 is a longitudinal sectional view of the terminal air conditioner according to this invention. FIG. 4 is a perspective view of FIG. 2, and FIG. 5 is a vertical sectional view of the constant air volume automatic control mechanism. 10...Terminal air conditioner, 11...
Ceiling surface, 12...Horizontal passage section, 13...
・Indoor, 14... Curved passage section, 15...
・Box storage section, 16... Bulkhead, 18...
...Mixed air outlet passage, 19...Indoor air induction passage, 22...Air outlet, 23...
・Air suction port, 26...Injection nozzle hole, 27・
...Injection box, 29... Constant air volume automatic control mechanism.

Claims (2)

[Scope of utility model registration request] (1) An end air conditioning duct having a long horizontal passage parallel to the ceiling surface and a curved passage that curves with a large curvature from the distal end of the horizontal passage and opens into the room; Both passages are partitioned vertically by a partition wall to form a mixed air blowing passage and an indoor air induction passage, and an air outlet is attached to the opening of the curved passage of the mixed air blowing passage, and the curved passage of the indoor air induction passage is attached to the opening of the curved passage of the mixed air blowing passage. An air suction port is installed adjacent to and integrated with the air outlet at the opening of the section, while an injection box having a large number of injection holes for blowing out low-temperature conditioned air at high speed is installed behind the horizontal passage section of the mixed air blowing passage. An end air conditioner characterized in that the indoor air is drawn from the air intake port by the injection force of the low temperature conditioned air and is blown into the room from the air outlet while being mixed at a constant ratio. (2) Practical use characterized in that the amount of low-temperature conditioned air from the nozzle injection box is automatically controlled in response to fluctuations in indoor temperature according to instructions from a temperature sensor installed in the indoor air induction passage. An end air conditioner according to claim (1) of patent registration.