JP2020060344A5 - - Google Patents

Description

Air conditioning equipment with cooling device

The present invention relates to an air conditioning device provided with a cooling device that forms a uniform indoor air conditioning environment without giving an unpleasant feeling of air to the occupants.

Conventionally, as an air conditioner equipped with a cooling device, an air conditioner system in which a blowout device is arranged on the ceiling of an office or the like is known. This is as shown in FIG. 1. In a normal ceiling air conditioner a, a refrigerant coil b is arranged, and the return air from the central portion of the frame c to the living room is driven by a motor e via a filter d. It is often used that the air is sucked by the fan f, is passed through the refrigerant coil b arranged around the fan f, the air RA is air-conditioned, and the air is supplied to the room through the air supply / discharge port i. The reference numeral g is a drain pan, and the water condensed on the coil is accumulated and discharged, and the outside air OA is supplied from the outside air outlet h.

However, since the fan f is incorporated in this conventional cooling device a, the air blown by the fan f gives an unpleasant feeling of air to the occupants in the room, and in many cases, a non-uniform wind speed is generated, and above all, the airflow is large. Therefore, the noise is large due to the fan f and the motor e, the energy consumption of the motor e is also large, and it is necessary to separately provide the outside air outlet h, which not only requires a large initial cost but also requires a maintenance cost for the motor and the like.
Therefore, as shown in Patent Document 1, it is a so-called passive chilled beam, which is a cooling device that does not use a fan, and is uniform without giving an unpleasant air feeling to the occupants by natural convection heat transfer. Cooling devices that form an indoor air-conditioned environment have also been developed.

Japanese Unexamined Patent Publication No. 2017-172834

By the way, the cooling device of Patent Document 1 mentioned above is a cooling device that does not use a fan, has a weak air carrying capacity, has a low cooling capacity because it uses medium-temperature cold water for the cooling coil, and has a vertical blowout. In the office environment, there was a problem that it was not possible to deal with partitions and the like.
The present invention has been made in view of the above problems, and although a fan is used to introduce outside air, the fan is not placed inside the frame provided on the ceiling, and an unpleasant feeling of air is given to the occupants. It is an object of the present invention to provide a cooling device in which a non-uniform wind speed does not occur.

In order to solve the above problems, the invention of claim 1 is provided with a return air absorption chamber, a supply air outlet chamber, and an outside air storage chamber in a frame provided on the ceiling panel, and is between the return air absorption chamber and the supply air outlet chamber. The outside air storage chamber is provided with a refrigerant coil, and the return air is cooled by the refrigerant coil, and outside air is blown to the outside air storage chamber by an outside air intake fan provided outside without incorporating a fan inside the frame. after injecting the outside air to the air supply blowing chamber from a plurality of nozzles provided in the ceiling portion of the air supply blowing chamber top, mixed with air return air that the cooling, blowing out the outlet of the lower portion of the air supply blowing chamber It is an air conditioner equipped with a cooling device characterized by supplying air to the room.
The invention according to claim 2 is characterized in that, in the air-conditioning apparatus provided with the cooling device according to claim 1, the outside air is pre-cooled by the total heat exchanger cooled by the exhaust from the living room by the fan. do.
The invention according to claim 3, in the air conditioning apparatus having a cooling device according to claim 1 or 2, blowing of the lower portion of the outlet and the outlet is horizontal cool air is attracted along the ceiling to produce the Coanda effect It is characterized by being blown out.

According to the air-conditioning apparatus provided with the cooling device of claim 1, since the outside air is blown to the outside air storage chamber by the outside air intake fan provided outside without incorporating the fan in the existing frame, the noise caused by the fan and the motor is generated. There is little motor energy consumption, there is no need to provide a separate outside air outlet, the initial cost is low, and there is no need for maintenance costs for motors and the like. Moreover, since the injection of fresh air from the outside air storage chamber to the indoor blowing air supply from a nozzle provided in a ceiling portion, without giving the person in the room an unpleasant feeling of air in a quiet balloon, uneven wind speed does not occur ..
According to the air conditioner provided with the cooling device of claim 2, the outside air blown by the fan is precooled by the total heat exchanger cooled by the exhaust gas from the living room, which saves energy.
According to the air-conditioning apparatus provided with the cooling device of claim 3, the air blown from the lower attracting air outlet is unpleasant because cold air is attracted along the ceiling and blown out in the horizontal direction so as to cause the Coanda effect. Non-uniform wind speed does not occur without giving to the occupants.

Cross-sectional explanatory view of an air conditioner equipped with a conventional cooling device with a built-in fan, A cross-sectional explanatory view of an air conditioner provided with a cooling device according to an embodiment of the present invention. FIG. 2 cross-sectional view taken along line XX, It is a side view of the refrigerant coil of FIG.

Examples of the air conditioner provided with the cooling device of the present invention will be described with reference to FIGS. 2 to 4.
[Example 1]
Is a description of examples of a cooling device in an air conditioning apparatus including a cooling device of the present invention, the cooling device is a device called an active chilled beam in combination with the blowing of the so-called fan, as shown in FIG. 2, the ceiling A return air absorption chamber 21, a supply air blowout chamber 22, and an outside air storage chamber 23 are provided in a frame 2 provided on the ceiling panel 223 located at 1, and a refrigerant is provided between the return air absorption chamber 21 and the supply air blowout chamber 22. A coil 3 is provided, and the return air RA is cooled by the refrigerant coil 3, and the outside air OA is sent to the outside air storage chamber 23 by the outside air intake fan 41 of the preliminary cooling device 4 provided outside without incorporating the fan in the frame body 2. Along with blowing air, the outside air OA is injected from the outside air storage chamber 23 into the supply air outlet chamber 22 from a plurality of nozzles 231 provided in the ceiling portion 221 and mixed with the cooled return air RA air to be mixed with the cooled return air RA air to supply the air supply outlet chamber 22. Air is supplied to the room 12 from the ( attracting ) outlet 222 at the bottom of the room.

The air blown from the lower ( attracting ) outlet 222 is designed so that cold air is attracted along the lower surface 11 of the ceiling 1 and blown out in the horizontal direction so as to produce the Coanda effect.
This injection nozzle 231 be plural, weak blow of the lower (attractant) blowing outlet 222 as a whole, since the blowing direction of the lower portion of the blow outlet 222 is substantially horizontal, ceiling rise to Coanda effect Cold air is blown out along the lower surface of the ceiling so as to be attracted. Therefore, a non-uniform wind speed does not occur without giving an unpleasant feeling of air to the occupants.
Further, the outside air OA blown by the fan 41 of the pre-cooling device 4 is pre-cooled by the known total heat exchanger 42 by the exhaust EA from the room (living room) 12 to form an efficient cooling system. ..
As shown in the cross-sectional view of FIG. 3 of the XX line of FIG. 2, the air supply / outlet chamber 22 is arranged so as to surround the four sides of the central return air absorption chamber 21, and the return air absorption chamber 21 and the supply air outlet chamber 21 are arranged. A refrigerant coil 3 for cooling by using a refrigerant is arranged on the entire circumference between the refrigerator and the air supply chamber 22, and a plurality of nozzles 231 are provided on the entire circumference of the annular portion of the ceiling portion 221 above the supply air blowing chamber 22 to provide primary air. The outside air OA is injected at high speed to attract air-conditioned air, and cooling and heating are performed by the refrigerant coils 3 provided on the entire circumference. As described above, it is not necessary to provide an outside air OA supply device that takes in the outside air OA separately provided in the past and supplies the outside air OA to the room 12.

As shown in FIGS. 2 and 4, the cooling coils 3 are provided in several stages (8 stages in the embodiment), each coil 3 is provided with heat exchange fins 31 for promoting heat exchange, and the refrigerant inlet 32 at the lower end is provided. An electronic expansion valve 33 is arranged on the side, a refrigerant outlet 34 at the upper end of the refrigerant coil 3 is provided, and a heat exchange cycle is formed which is connected to the compressor 35 and connected to the heat exchanger 36 of the outdoor or heat source. This heat exchange cycle may be an efficient one using CFC substitutes as a refrigerant.
Reference numeral 24 in FIG. 2 is a filter for catching floating dust and the like in the room 12, and reference numeral 25 is a drain pan, which receives and discharges water condensed on the coil.

Because it is above configuration, according to the embodiment, since the blown outside air OA to outdoor air reservoir 23 by the outside air uptake fan 41 provided outside without incorporating a fan into the frame body 2, by the fan and motor There is less noise, there is no motor energy consumption, there is no need to provide a separate outside air outlet, the initial cost is low, and there is no need for maintenance costs for motors and the like. Further, since the outside air OA is injected from the outside air storage chamber 23 into the supply air outlet chamber 22 from a plurality of nozzles 231 provided on the ceiling portion 221 of the supply air outlet chamber 22, an unpleasant feeling of air is given to the occupants. No, and non-uniform wind speed does not occur. The outside air blown by the fan 41 is pre-cooled by the total heat exchanger 42 by the exhaust EA from the room (living room) 12, which saves energy.

It should be noted that the present invention is not limited to the above embodiment as long as it does not impair the characteristics of the present invention, and the fixed total heat exchanger 42 is used as the precooling device 4, but other air conditioning systems. , for example, and the desiccant air-conditioning equipment, and heat pump air-conditioning equipment, may be normal air conditioning equipment.

1 ... Ceiling, 11 ... Underside of ceiling, 12 ... Indoor, 13 ... Ceiling panel 2 ... Frame, 21 ... Return air absorption chamber,
22 ... Air supply outlet room, 221 ... Ceiling,
222 ... Lower ( attracting ) outlet,
23 ... outside air storage room, 231 ... nozzle,
3 ... Refrigerant coil, 31 ... Heat exchange fins, 32 ... Refrigerant inlet ,
33 ... electronic expansion valve, 34 ... cold medium exit, 35 ... compressor,
36 ... Heat exchanger,
4 ... Pre- cooling device, 41 ... Fan, 42 ... Total heat exchanger

Claims (3)

A return air absorption chamber, a supply air blowout chamber, and an outside air storage chamber are provided in the frame provided on the ceiling panel , and a refrigerant coil is provided between the return air absorption chamber and the supply air blowout chamber, and the return air is supplied by the refrigerant coil. While cooling, outside air is blown to the outside air storage chamber by an outside air intake fan provided outside without incorporating a fan inside the frame, and outside air is blown from the outside air storage chamber to the ceiling portion above the supply air outlet chamber. by spraying from the nozzle to the air supply blowing chamber, mixed with air return air that said cooling comprises a cooling device, characterized in that the air supply into the room from blowing out the outlet of the lower portion of the air supply blowing chamber Air conditioning equipment . The air conditioner provided with the cooling device according to claim 1, wherein the outside air is pre-cooled by the total heat exchanger cooled by the exhaust gas from the living room. Blowing of the lower portion of the outlet and outlet air conditioning with a cooling device according to claim 1 or 2 cold air along the ceiling to produce the Coanda effect, characterized in that the blown out in the horizontal direction are attracted Equipment .

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