Air conditioning system using outdoor air, indoor air unit, and outdoor air unit thereof, and stack

Inactive Publication Date: 2013-10-31
FUJI ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0034]Here, the condenser radiates heat received by the evaporator from the surroundings (indoor air) and is usually installed at the exterior side (outside the building) to radiate heat to the outdoor air. By contrast, in the abovementioned configuration, the condenser is installed at the interior side (inside the building). Therefore, the temperature of the indoor air is greatly increased when the indoor air passes through the condenser. The indoor air after this increase in temperature indirectly exchanges heat with the outdoor air via the second refrigerant. Therefore, the indoor air can be cooled by the outdoor air even when the outdoor air temperature is very high.
[0035]Further, in the condenser, the refrigerant is cooled by the indoor air. Therefore, in particular under the environment in which the outdoor air temperature is higher than the indoor air temp

Problems solved by technology

The room temperature in such server rooms rises due to heat generation by a large number of se

Method used

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  • Air conditioning system using outdoor air, indoor air unit, and outdoor air unit thereof, and stack
  • Air conditioning system using outdoor air, indoor air unit, and outdoor air unit thereof, and stack
  • Air conditioning system using outdoor air, indoor air unit, and outdoor air unit thereof, and stack

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Experimental program
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first embodiment

[0053]FIG. 1 shows the configuration of the air conditioning system (indirect outdoor air cooling system) of the

[0054]In FIG. 1, the cooling object space that is to be cooled with the indirect outdoor air system is assumed to be the same as in the conventional example shown in FIG. 14. Thus, the interior space which is the object of cooling is, for example, a server room having installed therein a rack 102 carrying heating elements 101 such as server devices (computer devices). In the present example, the space of server setting shown in the figure is divided into an under-floor space and an attic space, in the same manner as in FIG. 14. This example, which is obviously not limiting, is used in the present explanation. In this example, the cooling object can be also interpreted, in the narrow meaning thereof, as the space of server setting.

[0055]Further, similarly to the example shown in FIG. 14, the interior of the building is separated from the exterior of the building by a wall 1...

second embodiment

[0101]The air conditioning system (integrated air condition system) of the second embodiment will be explained below.

[0102]The air conditioning system of the second embodiment is also an indirect outdoor air cooling system, but has an integrated compact configuration.

[0103]In the indirect outdoor air cooling system of the first embodiment, a ductless compact configuration that is simple to install is suggested for the indirect outdoor air cooler 20, but the typical air conditioner 10 is substantially the same as in the conventional system.

[0104]In the second embodiment, an integrated indirect outdoor air cooling system is suggested in which the function of the indirect outer air cooler 20 and the function of the typical air conditioner 10 are integrated.

[0105]As a result, the entire device configuration can be simplified, the device can be reduced in size and cost, and the total power consumption can be also expected to reduce.

[0106]FIG. 2 shows the configuration of the air conditio...

third embodiment

[0152]The air conditioning system of the third embodiment will be explained below.

[0153]The air conditioning system of the third embodiment resolves the above-described main problem. Thus, the air conditioning system is provided in which the outdoor air can be used for cooling the interior space even when the outdoor air temperature is high.

[0154]FIG. 4 shows the configuration of the air conditioning system (variation 1) of the third embodiment.

[0155]FIGS. 5A and 5B show the configuration of the air conditioning system (variation 2) of the third embodiment.

[0156]FIG. 6 shows the operation model of the air conditioning system of the third embodiment.

[0157]The air conditioning system of the third embodiment uses the outdoor air to cool the interior space, as in the above-described indirect outdoor air cooling system, and is therefore sometimes also called “outdoor-air-using air conditioning system”.

[0158]This system will be initially explained hereinabove with reference to FIG. 4.

[015...

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Abstract

An air conditioning system using outdoor air has a first heat exchanger, an evaporator, a condenser, and a first fan disposed on the interior side; and a second heat exchanger and a second fan disposed on the exterior side. An expansion valve and a compressor are further provided. An air conditioner has a first piping connected to the evaporator, the condenser, the expansion valve, and the compressor, for circulating a first refrigerant to perform a compression-type refrigeration cycle. An indirect outdoor air cooler has a second piping connected to the first heat exchanger and the second heat exchanger for circulating a second refrigerant to induce a heat exchange in the first heat exchanger between the second refrigerant and the indoor, and to induce a heat exchange in the second heat exchanger between the outdoor air and the second refrigerant.

Description

TECHNICAL FIELD[0001]The present invention relates to an air conditioning system using outdoor air.BACKGROUND[0002]For example, a large number of servers have been installed in server rooms of data center or enterprises. The room temperature in such server rooms rises due to heat generation by a large number of servers and such increase in room temperature can result in malfunction or damage of the servers. For this reason, an air conditioning system has been used to maintain a constant temperature inside the entire room. Such air conditioning system operates practically at all times, even in winter.[0003]In order to stabilize the temperature in the server room, the conventional air conditioning system designed for such server room uses a circulation system such that the low-temperature air (cold air) blown from an air conditioning device and supplied into the server room flows in contact with a server on a server rack, thereby cooling the server, and the air (warm air) warmed up by...

Claims

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Application Information

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IPC IPC(8): F24F5/00F24F12/00
CPCF24F5/0046F24F12/00F24F1/022F24F13/30F25B25/005H05K7/20745F24F2011/0006Y02B10/20Y02A30/272
Inventor TAKAHASHI, MASAKIMINEGISHI, YUICHIROOHGA, SHUNSUKE
Owner FUJI ELECTRIC CO LTD
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