JPH02122131A - Cooling device - Google Patents

Abstract

PURPOSE:To make it possible to cool a space substantially at a uniform temperature by boring a number of diffusers downward on the surface, laying out a duct having a hollow cooling passage communicating with said diffusers on an indoor ceiling or a wall surface near the ceiling surface so that it may surrounded the space to be cooled, and installing a cooled air intake section to a part of said duct so as to introduce the cooled air. CONSTITUTION:A cooled air generated in a cooled air generation device 1 is introduced into a cooled air passage inside a duct 3 by way of a connection duct 2 and blown out indoors from a number of diffusers 4 provided downward on the surface. As this cooled air and a near-by air cooled by the cooled air are colder in temperature and higher in density than the ambient air, the air falls down, thereby producing a descending air current below the diffusers 4. The space to be heated which is surrounded by the descending air current is heated by the heat generated by human bodies of occupants, the radiation heat irradiated by a wall surface or other heat sources, and subjected to a rise in temperature, thereby reducing the density of the air. As a result, the air rises upward, then cooled by the cooled air blown out from the diffusers 4 and descends again. This cycle generates a circulating air current with a low velocity in the space to be heated so that the space may be cooled uniformly.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a cooling device using cold air for use in household cooling.

Conventional technology Conventional air-conditioning systems for cooling indoor rooms are those that generate cold air using equipment installed on the walls, floors, or windows of the room, and emit the cold air directly into the room from the front or top of the equipment to cool the room. Used a lot.

Problems to be Solved by the Invention According to such conventional means, the size of the cold air outlet is restricted, so in order to equalize the indoor temperature, it is necessary to increase the speed of the cold air blown out. As a result, the cold air comes into direct contact with the human body, causing discomfort, and the wind speed is high, creating a large amount of noise. As a means of solving these problems, there is a method of installing a board with many small holes through a certain space across the entire ceiling surface, introducing cold air into the space, and blowing the cold air into the room from the small holes. ,
This method requires extensive construction work and has the problem that the cold air outlet is lower than the ceiling, giving residents a feeling of pressure.

The present invention solves the above problems, and provides an air conditioner that cools a room at a uniform temperature without causing discomfort due to strong cold air, and that can be installed with simple construction and without giving residents a strong feeling of pressure. The purpose is to provide a device.

Means for Solving the Problems To achieve this, the present invention provides a surface with a large number of air outlet holes formed almost downwardly, and a duct having a hollow cold air passage communicating with the air outlet holes, which is installed on the ceiling surface of the room or on the ceiling surface. The duct is arranged on a nearby wall so as to surround the space to be cooled, and a part of the duct is provided with a cold air introduction part, so that cold air is introduced from the cold air introduction part.

Function In the above configuration, when cold air is introduced from a separately provided cold air generator through the cold air introduction section, the cold air is discharged into the room from the connected blow-off holes through the duct.

The cold air blown out from the outlet and the nearby air cooled by the cold air have a higher density than the air in other areas, so they fall, creating a downdraft below the outlet. The temperature in the central part of the indoor air-conditioned space surrounded by this downdraft rises due to heat generated from the human body, etc., and the temperature rises due to natural convection.
In the space to be cooled, a large circulating flow is generated that descends at the outlet and rises almost at the injection section. This circulating flow cools the space to be cooled at a substantially uniform temperature, and since the blow-off holes are provided on the outer periphery of the space to be heated, the cold air does not come into direct contact with the bodies of people living in the space.

Example An embodiment of the present invention will be described below with reference to the drawings.

In the figure, 1 is a cold air generator that generates cold air using cold water or refrigerant, 2 is a connecting duct that forms a cold air passage between the cold air generator 1 and the duct 3, 3 is a duct that has a cold air passage inside, and 4 is a duct that forms a cold air passage. A large number of air outlets are formed substantially downward on the surface of the duct 3, 5 is the ceiling surface of the room in which it is installed, and 6 is the wall surface thereof.

In the above configuration, the cold air generated by the cold air generator 1 is introduced into the cold air passage in the duct 3 through the connecting duct 2, and is blown into the room through the many downward blowing holes 4 provided on the surface. The cold air blown out from the air outlet 4 and the nearby air cooled by the cold air are lower in temperature and have a higher density than the surrounding air, so they fall, creating a downward airflow below the air outlet 4.

On the other hand, in the heated space surrounded by the downward airflow generated below the air outlet 4, the temperature rises due to heat generated from the human body living in the space, radiant heat from the wall, and other heat sources, and the density of the air increases. is lowered, so it rises due to the natural convection effect, is cooled by the cold air blown out from the air outlet 4, and falls. This cycle generates a large circulating flow with low wind speed that descends at the bottom of the air outlet 4 and rises near the center in the space to be heated, and this circulating flow cools the space to be cooled almost uniformly.

Next, according to the configuration of the present invention, the cold air blowout holes 4 are provided substantially downward so as to surround the space to be cooled, so that the cold air blown out does not come into contact with the human body living in the space, thereby preventing damage caused by strong cold air. Pleasure can be prevented.

Further, as described above, since the space to be cooled is surrounded and cooled by the circulating flow at a low wind speed, there is no need to blow out at a high wind speed, and noise generated by the high wind speed is reduced.

In addition to the configuration shown in the figure, similar effects can be obtained in a configuration in which the cold air generator 1 is installed outdoors and connected to the duct 3 indoors through the connecting duct 2. In this case, in order to improve the efficiency of the device, it is desirable to provide an air passage that connects the intake port of the cold air generator 1 with the room.

In addition, the configuration of the present invention is much simpler than the method of installing the duct 3 on the entire ceiling surface to surround the space to be cooled and on the wall surface 6 near the ceiling. The height of the ceilings in most of the rooms is not low, so the occupants are less likely to feel oppressed.

Effects of the Invention As is clear from the above explanation, according to the configuration of the present invention, a large number of substantially downward air outlet holes are bored in the surface, and a duct having a hollow cold air passage is installed on the indoor ceiling surface or near the ceiling surface. Since the duct is arranged on a wall so as to surround the space to be cooled, a cold air introduction section is provided in a part of the duct, and cold air is introduced from the cold air introduction section, the following effects can be expected.

(1) The space to be cooled surrounded by the duct can be cooled at a substantially uniform temperature.

(2) Less discomfort caused by strong cold wind.

(3) Low noise.

(4) Installation work is easy.

(5) There is no feeling of pressure on residents.

[Brief explanation of the drawing]

The figure is an external perspective view of a cooling device according to an embodiment of the present invention. 1...Cold air generator, 2...Connection duct, 3...Duct, 4...Blowout hole.

Claims (1)

[Claims] A duct with a large number of air holes perforated almost downward on the surface and a hollow cold air passage communicating with the air holes is placed on the indoor ceiling or on a wall near the ceiling so as to surround the space to be cooled. and a cooling device in which a cold air introduction part is provided in a part of the duct.