JPH11304184A - Air-conditioning system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent dew from being formed in a grill. SOLUTION: The chamfering (shadow region) of a corner at the outermost- periphery side in a grill hole 67 at the outermost-periphery side out of a number of grill holes 6 and 7 being formed at a grill 66 is increased as compared with the chamfering of the corner at the other parts, thus blowing cold air into the inside of a room from the grill hole 67 and preventing air in the room concerned from flowing through the surrounding part of the grill 66 that is cooled by cold air and hence preventing dew formation when the indoor air flows through the surrounding part of the grill 66 while being caught by the cold air concerned.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioning system in which, when air conditioned by an indoor unit is blown into a room from a blowout chamber, dew condensation does not occur on a peripheral portion of a grill provided in the blowout chamber. .

[0002]

2. Description of the Related Art Conventionally, in order to cool and heat a plurality of rooms, it is common to provide an air conditioner corresponding to each room. However, this requires a large number of air conditioners and is uneconomical. It is.

Therefore, a multi-type air conditioner that performs air conditioning by providing an indoor unit in each room and supplying a refrigerant to the indoor unit from one outdoor unit has begun to be provided to the market.

However, even in this multi-type air conditioner, the same number of indoor units as the room to be conditioned is required.
When the number of conditioned chambers is large, the total piping distance of the refrigerant pipes becomes longer, so it is necessary to use an outdoor unit with a large capacity to circulate the refrigerant.
There is a problem of lack of workability and maintainability.

[0005] From such a viewpoint, the present applicant has proposed an air conditioner having a configuration as shown in FIG. 7 in Japanese Patent Application No. 9-618.

The air conditioner includes an outdoor unit 20a, which is provided outdoors with a compressor or the like (not shown) for compressing a refrigerant.
20b, indoor units 10a and 10b arranged under the ceiling or under stairs for exchanging heat between the refrigerant and the indoor air, and a blow-out chamber provided in each conditioned room and blowing conditioned air to the conditioned room. 60a and 60b, and ducts 100a and 100b for guiding the air conditioned by the indoor units 10a and 10b to the blowing chambers 60a and 60b.

[0007] The blowing chamber 6 provided on the floor side
8a, an elongated grill hole 62 as shown in FIG.
A grill 61 provided with a large number is provided, and a trumpet-shaped grill 63 is mounted on the blowout chamber 60b provided on the ceiling side as shown in FIG. 8B.

[0008]

However, when cooling air is blown into the room from the floor-side blowing chamber 60a during cooling, there is a problem that the periphery of the floor-side grill 61 is condensed as shown in FIG. 8A. In FIG. 8A, a mark “x” indicates a dew condensation area).

Further, the grill hole 62 of the floor side grill 61 is relatively large, so that there is an inconvenience that, for example, small items such as pencils fall from the grill hole 62 into the blowout chamber 60a.

Accordingly, an object of the present invention is to provide an air conditioning system provided with a grill that prevents the above-mentioned dew condensation and prevents small items from falling.

[0011]

In order to solve the above-mentioned problems, the invention according to claim 1 provides an indoor unit for exchanging heat between a refrigerant and room air, and a plurality of indoor units provided on floors and ceilings of the conditioned rooms. And an air-conditioning system having a blow-out chamber connected to the indoor unit by a duct disposed under the ceiling and under the floor, and for blowing air conditioned by the indoor unit from an outlet to a conditioned room. In the above, a grill provided with a large number of grill holes through which air-conditioned air passes and dew condensation preventing means is provided at an outlet of an outlet chamber arranged on the floor side. As a result, when cool air is blown out of the grill hole,
While the room air around the grill hole is caught in the cool air,
It is characterized in that it is cooled by the cold air to prevent dew condensation.

According to a second aspect of the present invention, the corner of the grill hole is provided with a predetermined size so that the room air entrained by the cool air blown from the grill hole does not contact the peripheral surface of the grill hole cooled by the cool air. It is characterized in that the dew condensation preventing means is formed by chamfering.

According to a third aspect of the present invention, the dew condensation preventing means is formed by chamfering a corner of the outermost peripheral side of the grille hole located on the outermost peripheral side with a predetermined size out of a large number of grille holes. It is characterized by.

According to a fourth aspect of the present invention, the dew condensation preventing means is formed by chamfering a corner of the outermost peripheral side of the grille hole located on the outermost peripheral side with a predetermined size larger than other corners. It is characterized by.

According to a fifth aspect of the present invention, a part of the surface of the grill is depressed and a large number of grill holes are formed in the depression to secure a distance between the top surface of the grill and the grill hole to prevent dew condensation. The means is formed.

According to a sixth aspect of the present invention, a net is provided at an outlet of the outlet chamber to prevent small articles from falling into the outlet chamber.

[0017] The invention according to claim 7 is characterized in that the net is formed of a non-combustible material so that, for example, even if a cigarette is fired, the blowout chamber is not burned by receiving the fire.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings. Note that the same reference numerals are used for the same components as those in the related art, and description thereof is omitted as appropriate.

FIG. 1 is a conceptual diagram when an air conditioning system according to the present invention is installed in a house.
It consists of floor air conditioners, and these configurations are the same except that the configuration of the suction chamber described later is different.

Each of the air conditioners is provided in an outdoor unit 20a, 20b having a compressor (not shown) for compressing the refrigerant, indoor units 10a, 10b for exchanging heat between the indoor air and the refrigerant, and a conditioned room such as a living room. The blow-out chambers 60a and 60b for blowing the conditioned air into the conditioned room, the indoor unit 10a,
Branch chambers 50a, 50b for distributing the conditioned air from 10b to the respective conditioned rooms, indoor units 10a, 10b,
Branching chambers 50a and 50b and blowing chamber 60
a, duct 60 connecting air passages 60a, etc. to form an air flow path
00a, 100b, and a ventilation unit 30 provided with a heat recovery unit (not shown) for performing indoor ventilation and recovering heat of the ventilation air.

The indoor unit 10 of the air conditioner for the first floor
a, 10b are arranged in a closed space such as below the stairs,
The closed space 40a functions as a suction chamber.

This eliminates the need to separately provide a suction chamber, thereby making it possible to reduce the manufacturing cost.

In the present embodiment, the outside air and the room air flow into the closed space 40a and the suction chamber 40b below the stairs at a constant ratio irrespective of the time of cooling or heating. When changing the ratio, a damper device or the like may be provided for these.

The exhaust top 71 and the outside air inlet 80 of the exhaust duct 70 are covered with an insect-proof net or the like (not shown) so that insects and the like do not enter the room.

The outlet chambers 60a and 60b are box-shaped members formed of a heat insulating member such as styrene foam. Ducts 100a and 100b are connected to one side surface, and are provided at the upper part of the outlet chamber 60a and the lower part of the outlet chamber 60b. Are the air outlets 64a, 64
b is formed.

At the outlet 64a of the floor-side outlet chamber 60a, a net 65 for preventing dust from falling is provided as shown in FIG. 2 (see FIGS. 2 (a) and 2 (b)). A grill 66 having a large number of holes 67 is provided (see FIG. 2C).

Since the eyes of the net 65 are sufficiently smaller than the size of the grill hole 67, even if a small object such as a pencil falls from the grill hole 67, the eye can be received by the net 65.
It is no longer necessary to put a hand on the bottom of the deep blowing chamber 60a to pick up the falling object.

The net is made of a non-combustible material such as aluminum or iron metal. Thus, for example,
Even if the cigarette goes out, catching it will prevent the blowout chamber from burning.

FIG. 3 is a top view of the grill 66, and FIG. 4 is a sectional view taken along the line AA of FIG. As can be seen from the figure, the corner of the grill hole 67 is chamfered, and
The chamfer of the outermost corner (the hatched area in FIG. 3) of the outermost grill hole 67 is larger than the chamfer of the corner in the other portions, and constitutes the dew condensation preventing means.

For example, the outermost chamfer has a radius of 5 mm.
The chamfer of the other corner has a radius of 2 mm.

The solid arrows in FIGS. 4 to 6 indicate the flow of cool air, and the dotted arrows indicate the flow of indoor air.

The reason for changing the size of the corner chamfer is as follows. That is, when the size of the chamfer is uniform and small as in the prior art, as shown in FIG. 5, the cool air is blown into the room through the grill hole 61, so that the room air is entrained in the cool air. It flows around the grill (while being dragged) and approaches the grill hole 61 and rises.

FIG. 5A is a partial top view of a grill 61 having a conventional configuration, and FIG. 5B is a partial cross-sectional view thereof.

For this reason, the indoor air is cooled by the cold air and flows by the periphery of the grill cooled by the cold air (the area indicated by a circle in FIG. 5B) and is condensed (FIG. 5). (A) indicates the dew condensation area in (a).)

That is, if the size of the chamfer is small, the cool air blown out from the grill hole does not spread widely in the vicinity of the grill hole, so that room air enters there and dew forms.

By the way, between the adjacent grill holes 62,
Since the room is filled with cold air, there is no inflow of room air and no condensation occurs.

Therefore, as described above, the chamfer of the grille hole 67 on the outermost peripheral side is made larger than the others, so that the amount of indoor air entrained is reduced, and the entrained indoor air is cooled around the grill cooled by cool air. By preventing contact with the parts, the occurrence of dew condensation is prevented.

In order to obtain the effect of the present invention, the above chamfer may be provided only at the outermost corner of the outermost grill hole 67, and the size of all the chamfers is made uniform. Obviously, the chamfer having the above-mentioned size may be used.

Further, the present invention is not limited to the above-described configuration. As shown in FIG. 6, the surface of the grill 66 is partially depressed, and the If the distance between the uppermost surface and the grill hole 69 is ensured, the above-described effects can be obtained.

[0040]

As described above, according to the first aspect of the present invention, since the grill is provided with the dew condensation preventing means, when the cool air is blown out from the grill hole, the indoor air around the grill hole is removed. While being engulfed in the cool air, it can be prevented from being cooled and dewed by the cool air.

According to the second aspect of the present invention, since the corner of the grill hole is chamfered to a predetermined size, when cool air is blown out from the grill hole, the room air around the grill hole is entrained in the cool air. However, dew condensation due to cooling by the cool air can be prevented with a simple configuration and at low cost.

According to the third aspect of the present invention, the outermost corner of the outermost grill hole is chamfered to a predetermined size out of a large number of grill holes. When the air is blown out, it is possible to prevent the room air around the grill hole from being caught in the cool air and cooled by the cool air to form dew.

According to the fourth aspect of the present invention, the size of the chamfer at the outermost corner of the grill hole located on the outermost side is made larger than that of the other corners, so that when the cool air is blown out from the grill hole. In addition, it is possible to prevent the room air around the grill hole from being caught in the cool air while being cooled by the cool air and to form dew condensation, with a simple configuration and at low cost.

According to the fifth aspect of the present invention, the distance between the uppermost surface of the grill and the grill hole is ensured by partially recessing the surface of the grill and forming a large number of grill holes in the recess. Thus, when cool air is blown out from the grill hole, it is possible to prevent the room air around the grill hole from being caught in the cool air and to be cooled by the cool air to form dew condensation with a simple configuration and at low cost.

According to the sixth aspect of the present invention, since the net is provided at the outlet of the blowing chamber, it is possible to prevent small articles from falling into the blowing chamber.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of an air conditioning system applied to the description of an embodiment of the present invention.

FIG. 2 is a diagram showing a configuration of a blowing section of a blowing chamber provided on a floor side.

FIG. 3 is a top view of the grill.

FIG. 4 is a partial sectional view of a grill.

FIG. 5 is a diagram applied to the explanation of the reason why the grill forms dew;

FIG. 6 is a diagram showing a configuration of another grill.

FIG. 7 is a diagram illustrating a configuration of an air conditioning system applied to the description of the related art.

FIG. 8 is a diagram showing a configuration of a grill.

[Explanation of symbols]

 10a, 10b Indoor unit 20a, 20b Outdoor unit 50a, 50b Branch chamber 60a, 60b Blow-out chamber 64a, 64b Blow-out port 65 Net 66 Grill 67, 69 Grill hole 68 Depression

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yasuhiro Mogi 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Takahiko Uguchi 2-chome Keihanhondori, Moriguchi-shi, Osaka No. 5-5 in Sanyo Electric Co., Ltd.

Claims (7)

[Claims] 1. An indoor unit for exchanging heat between a refrigerant and indoor air, and connected to the indoor unit by ducts provided on floors and ceilings of a plurality of conditioned rooms and arranged under the ceiling and under the floor. An air-conditioning system having a blow-off chamber for blowing air conditioned by the indoor unit from a blow-out port to a room to be conditioned in an air-conditioning system. A large number of grill holes through which the air passes, and when cold air is blown out of the grill holes, the room air around the grill holes is caught in the cool air and is cooled by the cool air to prevent condensation. An air conditioning system provided with a grill having dew condensation preventing means. 2. The corner of the grill hole is chamfered to a predetermined size so that room air entrained by the cool air blown out from the grill hole does not contact the peripheral surface of the grill hole cooled by the cool air. 2. The air conditioning system according to claim 1, wherein said condensation preventing means is formed. 3. The dew condensation preventing means is formed by chamfering a corner of the outermost side of the grille hole located on the outermost side of the plurality of grille holes with a predetermined size. The air conditioning system according to claim 2, wherein 4. An outermost peripheral corner of the grill hole located on the outermost peripheral side is larger than other corners,
4. An air conditioning system according to claim 2, wherein said dew condensation preventing means is formed by chamfering a predetermined size. 5. A depressed portion is formed in an upper surface of the grill, and the plurality of grill holes are formed in the depressed portion, so that a distance between an uppermost surface of the grill and the grill hole is ensured, and the dew condensation preventing means is provided. The air conditioning system according to claim 2, wherein the air conditioning system is formed. 6. The air outlet of the blow-off chamber is provided with a net for receiving small articles so as not to fall into the blow-out chamber.
Item 12. The air conditioning system according to the item. 7. The air conditioning system according to claim 6, wherein the net is formed of a non-combustible material.