JPS5944540A - Air ejecting apparatus - Google Patents

Abstract

PURPOSE:To prevent dropwise condensation of moisture effectively, by constituting an air ejecting section by a heat-insulating material, and covering the same with an air impermeable coating material. CONSTITUTION:A pressure equalizing box section and a primary-air ejecting port 27 are defined by a heat-insulating material 29, and the inner surface 29a and the outer surface 29b of the heat insulating material 29 are covered with an air impermeable coating material. Contact of suction air and primary air is caused at a limited area of the heat-insulating material 29 by the function of an exposed end face 29e and an exposed inner surface 29g of the heat-insulating material 29, and almost all of the suction air drawn into the material 29 from the exposed end face 29e is discharged promptly from the exposed end portion 29e by the energy possessed by ejected primary air. Further, since the primary air and suction air are circulated at a high speed in the heat-insulating material 29, dropwise condensation of moisture is not caused by the vaporizing effect obtained by ventilating function.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in an air blowing device that particularly aims to significantly improve the dew condensation prevention function.

In recent years, the air volume n'' system has reduced blower power, downsized air conditioners, and equipment disadvantages such as O/installation 1T.
ii) The amount of conditioned air required per unit floor area has been reduced in order to reduce the cost of air conditioning equipment and operation by reducing air conditioning costs, simplifying control equipment, reducing tact space, and reducing the need for heat insulating materials. It has been proposed to make the heat capacity constant and increase the heat capacity per unit 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°C1 relative humidity 50%, heat capacity (■ Soil is supplied as conditioned air with a dry bulb temperature of 5°C and a relative humidity of 90fo, but in this state x+, r1+ air is supplied indoors at a low temperature. Then, the air diffuser itself exposed indoors is cooled by the conditioned air, and since the indoor air in contact with the air diffuser has a dew point temperature of 14.5°C, it causes condensation and water droplets to form on the surface of the air diffuser. This causes problems such as staining the ceiling surface, causing inconvenience to residents by dripping, and staining appliances, furniture, and products.

To solve this problem, the low-temperature conditioned air (
Indoor air is mixed at a fixed ratio with primary air for cooling, and this mixed blown air has a dry bulb temperature of 176°C and a relative humidity of 67%.
As the deviation is adjusted, there will be no condensation phenomenon in the indoor air diffuser.

As a means for this purpose, as shown in FIG. 1(a), there is a device that attracts and mixes indoor air from the induction 3 with the primary air flow blown from the primary air outlet 1 toward the air outlet 2. As shown in A and FIG. 1 (1)), there is an air blower 14 in the primary air blower [a device that attracts and mixes room air from the induction port 6 with the primary air flow blown toward 15] 3
Alternatively, as shown in FIG. 1(C), various types of devices have been proposed, such as a device C that draws indoor air from the gap 8 and mixes it with a primary air flow blown out from a primary air blowing lower.
Some of them have been put into practical use.

However, even with such a primary air outlet 1.4°7,
The primary air outlet itself, like the air diffusion device described above, condenses and forms water droplets on its surface, which in the case of device A causes the duct to rust and tact to flow out from the air outlet 12. Device 1~. In C, attraction rZ]6.1
A new problem has arisen: dripping from the next air outlet RL7.

Therefore, in order to suppress such a dew condensation phenomenon, the pressure equalizing hook part 9 and the primary air outlet 10 are separated by a heat insulating material 10, as shown in FIGS. The entire inner surface 11a is covered with an iron plate (non-air permeable covering material) 12, and the entire outer surface 11b is covered with an aluminum foil (non-air permeable covering material) 13.
), the entire end surface 11C is covered with a non-porous covering material (iron plate 1
2 or continuous aluminum foil) 14, or the end face 11C is entirely exposed as shown in FIG. 3(b).

However, in the former type, the surface of the iron plate 12 and the covering material 1
In the latter type, the induced air enters the breathable heat insulating material 11 from the end surface 11C and cycles, so dew condenses on the back surface of the iron plate 12 and forms water droplets 15. However, it has not been possible to fundamentally solve the above-mentioned problems.

The present invention has been made in view of such conventional problems, and consists of at least the blowing part of the air blowing part 1 being made of a uniform and highly breathable heat insulating material, and at least the inner surface, outer surface and end surface of the blowing part. The exposed end face of the heat insulating material is coated with a non-breathable covering material, and the exposed end face of the heat insulating material is formed on the end face flush with the end face covering material by a predetermined width from the inner surface, and the exposed end face of the heat insulating material is formed on the inner surface by a predetermined width from the end face. The exposed inner surface of the heat insulating material is formed flush with the inner surface covering material, and the exposed end surface and exposed inner surface effectively prevent dew condensation.

Embodiments of the invention will now be described in detail with reference to the accompanying drawings.

As shown in FIG. 4 (al) and FIG. 4 (b), the primary air blowing device has an outer duct 21 and an inner duct 22 arranged on the back side of the ceiling 20, and the second flow side of the outer duct 21 is Indoor 23
The upstream side of the inner duct 22 is connected to the air outlet 1'' 25 facing the room 23, and the downstream side of the inner duct 22 is connected to the primary air outlet box 26. Then, the blank air is drawn by the primary air flow blown out from the primary air outlet 27 of the box 26 through the induced air suction port 24 and the outer duct 21, and is mixed with the primary air at a constant ratio. This is a known structure in which mixed blown air is blown out from the air outlet 25 into the room 23.

As shown in FIG. 5 (at and FIG. 5 (1)), in the primary air blowing box 26, the pressure equalizing box part 28 and the primary air blowing outlet 27 are separated by a heat insulating material 29, as in the conventional case. Almost the entire inner surface 29a is covered with an iron plate 30, which is a non-breathable covering material, and almost the entire outer surface 291] is covered with an aluminum foil 31, which is a non-porous covering material. .

The heat insulating material 29 is made of a material with uniform and high air permeability, for example, with a thickness of 20 mm, and has a surface wind speed I of 20 mm.
Approximately 50mmAg (10-100mAg) for A
A material (fine fiber aggregate) having an air permeability resistance of

On the other hand, as shown in detail in FIG. 6(a), the end surface 29C of the primary air outlet 1'' 27 is formed with a recess 29d leaving a predetermined width a from the inner surface 29a. ,
A non-breathable rubber sealant 32 is applied and filled so as to be flush with the end surface 29C, and is airtightly connected to the aluminum foil 31, so that the exposed end surface 2 of the heat insulating material 29 having a width a is attached to the end surface 27C.
Form 9e.

In addition, the inner surface 29a of the primary air blowout Ll 27 is connected to the end surface 2
9 (from a predetermined width 1) to form a recess 29E,
The same rubber sealant 32 as described above is applied to the inner surface 2 of the recess 29.
The exposed inner surface 29g of the heat insulating material 29 having a width of 1) is formed on the inner surface 27a by coating and filling the heat insulating material 29 flush with the inner surface 9a and airtightly connecting it to the iron plate 30.

The rubber sealant 32 has good fluidity during application processing (300-9001) OiSe) and has a concave portion 29d.

29 [approximately 5.5-9 g/100c+I! It is uniformly applied and filled, and penetrates into the heat insulating material 29 to a thickness of about IW11, forming a complete air-permeation blocking film.

The reason why the sealant 32, the exposed end surface 29e, and the exposed inner surface 29g are made smooth is that if they are not flush, turbulence will occur in the induced air flow and the primary air flow, and the induced air and the primary air will be more than necessary. This is to prevent condensation from coming into contact with the product.

The ratio of the width a of the exposed end surface 29e to the width l of the exposed inner surface 29g is preferably b'=2a to 3a when the blowout angle θ of the primary airflow is about 20 degrees.

Therefore, if the structure of the primary air blowout 127 is as described in Section 2, the exposed end surface 29e and the exposed inner surface 29g,
The contact between the induced air and the primary air has a width a.

Almost all of the induced air that entered the insulation material 29 from the exposed end 29e is blown away from the exposed end 29e by the blown energy of the primary air flow. At the same time, the primary air and the induced air circulate at high speed within the limited area of the insulation material 29, so even if there is condensation in still air, the evaporation effect due to the ventilation action This prevents condensation.

For reference, the limit formula for condensation prevention 1 in this method is shown above.

D B,,=January'R(1)BIt I)PIc)
/ Q, 32D 131) : Primary air dry bulb temperature 1) Bl, : Induced air dry bulb temperature 1) I) 1t: Induced air dew point temperature 0.32: Insulation coefficient according to this method Note that in the conventional method, the insulation coefficient is 1.0 to 0.7.

Figure 8 is a comparison diagram of the dew condensation limit area according to the tree method and the dew condensation limit area according to the conventional method I3 insulation coefficient -〇, 7.
This is a case where 1M 1 degree of primary air is 7'on.

As is clear from this diagram, it can be seen that the dew condensation limit area according to the tree method is much improved than the dew condensation limit area according to the conventional method 13.

In the embodiment shown in FIG. 6(a), the exposed end surface 29C of the heat insulating material 29 is
The exposed inner surface 29g was formed using a rubber-based sealant 32°32, but as shown in FIG. Alternatively, the aluminum foil 31 may be extended to airtightly face the recess 29d to form an exposed end surface 29e and an exposed inner surface 29g.

Furthermore, in each of the embodiments described in ``U'', the heat insulating material 29 necessary for ventilation and circulation in the area divided by the widths a and b was made of the same material as the heat insulating material constituting the entire primary air blowing box 26. , FIG. 7(a) and FIG. 7(1)), a structure may be adopted in which a heat insulating material piece 29 made of a material most suitable for ventilation and circulation is fitted and fixed in an airtight manner.

In this case, the heat insulating member 29 other than the heat insulating material piece 29 can not only be made of an inexpensive material with a heat insulating effect, but also the sealant 32 or the coating 4'/l' 30.31 and the exposed end 29e and This has the effect of making it easier to create a flush with the exposed inner surface 29g.

Although each of the above embodiments has been explained by taking the primary air blowing as an example, it goes without saying that it can also be applied to a normal air blowing r+ (air diffuser) as it is because of its excellent dew condensation prevention function.

@9 The following figures show various application examples of the present invention, and Figure 9 (a)
, Fig. 9(b) shows that when applied to a round axial flow iJ:'+D (nozzle) 4°, Fig. 10(a)-Fig.
1)) is applied to a rectangular axial flow blowout c+ 41 (slot), the 11th UA (a+, 111g1fb) is a blowout I with a guide vane 43 attached to the slot 42.
When applied to ZI 44, Fig. 12 (Fig. a1712 (2))
FIG. 13(a) and FIG. 13(bl) show the case when applied to a simple type air blower 1146, respectively.

As is clear from the explanation in section L below, the present invention provides heat insulation with good air permeability that is coated with a non-breathable coating phase (A) and exposed heat insulating material on the end face of the blow-off portion of the air blow-off port (A). In addition, since the exposed inner surface of the heat insulating material is formed on the inner surface, the bleed air circulation effect of the primary air and the induced air within the heat insulating material partitioned by the exposed end surface and the exposed inner surface can be effectively prevented. The primary air is low l:R+ (5℃
), no condensation will form on the outlet.

Furthermore, the structure is extremely simple, and it has various advantages such as being applicable to existing air blowing devices, making it of great practical value.

[Brief explanation of drawings]

Figure 1(a), Figure 1(1)) and Figure 1(C) are sectional views of conventional primary air blowing devices, and Figure 2(a) is a conventional basic primary air blowing box. 2(b) is a front view of FIG. 2(-), FIG. 3(al) and FIG. 3(l)
) is an enlarged view of the air outlet in FIG. 2(a), FIG. 4(a) is a plan sectional view of the air blowing device according to the present invention, and FIG. 4(1)
is a sectional view of FIG. 4(a), FIG. 5(a) is a sectional view of a basic primary air blowing box according to the present invention, and FIG. 5(1)
) is the front view of Figure 5(a), Figure 6(a) and Figure 6(
b) is an enlarged view of the balloon 1 in FIG. 5(a) according to the first embodiment, and FIG. 7(a) and FIG. 7(1)) are an enlarged view of FIG. 5(a) according to the second embodiment. Figure 8 is an enlarged view of the blowout [1], Figure 8 is the condensation limit diagram of the conventional method and the wooden sword type blowout [1], Figure 9(a) is a cross-sectional view of the round axial flow outlet II, Figure 9(1) ) is shown in Figure 9 (
The front view of a), Figure 10 (21) is the square axial flow outlet [21
10(l) is a front view of FIG. 10(a), FIG. 11(a) is a sectional view of the air outlet with guide vane [-1], and FIG. 11(b) is a front view of FIG. Fig. 12(a) is a sectional view of the -order air outlet, Fig. 12(a) is a sectional view of the -order air outlet,
)) is a front view of Fig. 12(a), Fig. 13(a) is a cross-sectional view of the simple type-next air-blown FIG. 29a...Inner surface, 29b
...outer surface, 29C...end surface, 29e...exposed end surface, 29g...dew 17 inner surface, 30...iron plate, 31...
・Aluminum foil, 32...Rubber sealant, a,
b... Width. Patent applicant Niimi 2L 2Gyo Co., Ltd. TL 2D
Rito JiT Rishi Blue 1] 1 Sogai 2 people Figure 4 (
0) Figure 4 (b) Figure 5 (a) Figure 5 (b) Figure 6 (a
) Figure 6 (b) Figure 7 (G) Figure 7 (b) Figure 8 Dry temperature g (DB'C) Figure 13 (0) Figure 13 (b)

Claims (1)

[Claims] (1) At least the blowout part of the air blowout 1] is made of a uniform and uniformly breathable heat insulating material, and at least the inner surface, outer surface, and end surface of the blowout part are coated with a non-breathable coating layer, and the end surface is covered with a non-breathable coating layer. , an exposed end face of the heat insulating material is formed flush with a covering layer on the end face by a predetermined width from the inner surface, and an exposed inner face of the heat insulating material is formed on the inner face and flush with a covering layer on the end face by a predetermined width from the end face. An air blowing device characterized by forming: