JP3037374B2 - Air-cooled integrated refrigeration system - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a structure of an air-cooling integrated refrigeration apparatus or an air conditioner, and more particularly to a structure of a bottom porous plate. Here, the air-cooling integrated type is a type in which the entire refrigeration cycle is housed in one housing and the condenser is cooled by air cooling.

[Conventional technology]

Conventionally, the air-cooled integrated refrigeration system is, for example, Fujitsu Technical Report FUJI
It is publicly known, for example, in TSU37.2 (03 1986), in which cooling air is sucked through the perforated plate from the bottom surface of the housing containing the refrigeration cycle equipment. It is necessary to use a perforated plate having a minimum plate thickness, a maximum hole diameter, and a minimum hole interval specified by standards in consideration of a fire or the like, as the bottom perforated plate of the housing.

[Problems to be solved by the invention]

As described above, it is necessary to use a perforated plate stipulated in the standard as the bottom perforated plate of the air-cooled integrated refrigeration apparatus. Therefore, if it is flat, the ventilation area is uniquely determined depending on the size (bottom area) of the apparatus. Therefore, when a large amount of air is required, there is a problem that the blower for the condenser in the apparatus must have a high horsepower. However, the prior art does not show anything about how to devise the perforated bottom plate in order to avoid such a problem.

An object of the present invention is to provide an air-cooled integrated refrigeration system, in which the power of the blower is reduced and the refrigeration cycle operating pressure is reduced by devising the structure of the perforated bottom plate to improve efficiency and improve component reliability. I do.

[Means for solving the problem]

In order to achieve the above object, an air-cooled integrated refrigeration apparatus according to the present invention includes a compressor, an air-cooled condenser, a blower for a condenser, an expansion mechanism, an evaporator, and a housing housing a refrigeration cycle including auxiliary devices. In an air-cooling integrated refrigeration system configured to suck cooling air from a bottom-surface porous plate, a bottom strength member constituting a bottom structural member of the housing, a stay erected on the upper portion of the bottom strength member, A bottom perforated plate which is formed at a lower portion, has a large number of holes, is formed in a corrugated shape, and is provided within a height dimension of the bottom strength member.

[Action]

Because the bottom perforated plate is formed in a corrugated shape, it is not only durable, but also has a larger cross-sectional area, even if the size and spacing of the holes are the same as compared to a flat plate perforated plate.
The ventilation resistance is small.

〔Example〕

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 3 by taking an example of an air-cooled integrated refrigeration system for producing cold water.

As shown in FIG. 2, which is a cross-sectional structural view, the bottom surface (air inlet) of the housing 1 of the apparatus is constituted by a perforated plate 2 (schematically shown in FIG. 2 and details are shown in FIG. 1). doing. Inside the housing 1, a refrigeration cycle is constituted by a compressor 3 for refrigerant compression, an air-cooled condenser 4, an expansion mechanism 5, an evaporator 6, and other auxiliary devices (not shown), and is stored and arranged. ing. A condenser blower 7 is provided for the air-cooled condenser 4. Reference numeral 8 denotes intake air, and 9 denotes exhaust air. In FIG. 1, the condenser blower 7 is disposed on the upstream side of the air-cooled condenser 4, but the two positional relations may be reversed.

The housing 1 is installed on a room floor plate F stretched above a concrete floor C of a building via a support post S. Suction air 8
Is sucked from the lower space under the floor through the bottom perforated plate 2 into the housing 1 by the action of the blower 7 to cool the condenser 4, and is discharged from the housing 1 as exhaust air 9.

In FIG. 2, the refrigerant pressurized by the compressor 3 and turned into a high-temperature gas is cooled and liquefied in the air-cooled condenser 4 by blowing air from the condenser blower 7. The liquefied refrigerant is converted into a low-pressure wet gas by the expansion mechanism 5 and enters the evaporator 6, where the cooled fluid (in this example, water, not shown) is cooled by heat exchange to become a low-pressure superheated gas, and compressed. Returning to the machine 3, the operation of the refrigeration cycle is performed.

The high pressure of the refrigeration cycle changes due to various factors,
The amount of air blown to the condenser 4 is one of the important factors.
When the specifications of the components constituting the device are fixed, the magnitude of the ventilation resistance of the entire device determines the amount of air to be blown. The ventilation resistance of the entire device is affected by the ventilation resistance of the bottom porous plate 2. Therefore,
The ventilation resistance of the bottom porous plate 2 has an important meaning.

FIG. 3 is an explanatory view showing the specifications of a single-piece bottom plate.
d is the hole diameter, p is the space between the holes, and T is the thickness of the perforated plate. Since the bottom surface porous plate is a part of the outer shell that separates the inside and the outside of the device, there are generally restrictions on the hole diameter, the hole interval, the plate thickness, and the like. For example, Table 1 shows the standard of the bottom plate of the computer housing, and it is common that the bottom plate of the housing of the air-cooled integrated refrigeration system installed near the computer for cooling also complies with this standard. It has been. Therefore, the ventilation resistance cannot be reduced by unnecessarily increasing the porosity (area of the hole / area of the perforated plate) of the bottom surface porous plate of the housing of the air-cooling integrated refrigeration apparatus.

Therefore, in the embodiment of the present invention, the following structure is adopted so that the ventilation resistance can be reduced without increasing the aperture ratio of the bottom porous plate 2. FIG. 1 is a sectional structural view of a bottom surface of the apparatus according to the embodiment of the present invention. The structural features of the present embodiment include a bottom strength member 12 constituting a bottom structural member of the housing 1 of the device, a stay 16 erected on the top of the bottom strength member 12 for mounting parts inside the device, The bottom porous plate 2 is provided below the stay 16, has a large number of holes, is formed into a corrugated shape, and is provided within the height of the bottom strength member 12.
Reference numeral 17 denotes legs for supporting the apparatus on the floor plate F.

The ventilation area of the bottom perforated plate 2 is larger than that in the case of using a flat perforated plate by forming the perforated plate 2 into a corrugated shape, so that the ventilation resistance of the bottom perforated plate 2 can be reduced. In addition, the ventilation resistance of the device can be reduced.

Further, since the bottom porous plate 2 is accommodated within the height dimension 13 of the bottom strength member 12 of the apparatus, it does not contact with other parts and does not adversely affect the handling. Since the components inside the apparatus can be installed on the stay 16, there is no adverse effect when assembling the apparatus. Further, since the bottom surface porous plate 2 is corrugated, as a strength member that forms a part of a housing outer shell that separates the inside and the outside of the device,
It is very durable compared to the case of a flat shape.

In the above embodiment, the bottom porous plate is formed into a triangular waveform, but may be formed into a square waveform. Further, it is preferable that the bottom porous plate is removably attached so as to facilitate maintenance.

〔The invention's effect〕

As described above, the present invention can reduce the ventilation resistance, reduce the power of the blower, reduce the high pressure of the refrigeration cycle, and improve the efficiency by shaping the bottom porous plate of the housing into a corrugated shape as described above. In addition, the reliability of the device can be improved, and the floor area of the housing can be reduced, which greatly contributes to downsizing of the device. Also, because of the corrugation, the bottom perforated plate becomes very strong as a strength member that forms a part of the housing outer shell that separates the inside and the outside of the device. Further, since the corrugated bottom porous plate fits within the height dimension of the bottom strength member of the housing, it does not come into contact with other parts and does not adversely affect assembly or handling.

[Brief description of the drawings]

FIG. 1 is a sectional structural view of a bottom of an air-cooled integrated refrigeration apparatus according to an embodiment of the present invention, FIG. 2 is a sectional structural view of an air-cooled integrated refrigeration apparatus according to an embodiment of the present invention, and FIG. And (b) are a plan view and a side view illustrating the specifications of the perforated plate. DESCRIPTION OF SYMBOLS 1 ... Housing of apparatus, 2 ... Perforated bottom plate 3 ... Compressor, 4 ... Air-cooled condenser 5 ... Expansion mechanism, 6 ... Evaporator 7 ... Blower for condenser, 8 ... Suction air 9 ... exhaust air, 12 ... bottom strength member 16 ... stay

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Norio Todo 1 Horiyamashita, Hadano City, Kanagawa Prefecture Inside the Kanagawa Plant of Hitachi, Ltd. In the laboratory (56) References JP-A-2-78838 (JP, A) JP-A-64-25644 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F24F 1/00 F24F 1/02

Claims (1)

(57) [Claims] 1. A compressor, an air-cooled condenser, a blower for a condenser,
An air-cooling integrated refrigeration apparatus configured to suck cooling air from a perforated bottom plate in a housing containing a refrigeration cycle including an expansion mechanism, an evaporator, and other auxiliary devices, wherein a bottom structural member of the housing is configured. A bottom strength member to be provided, a stay erected above the bottom strength member, and a bottom formed below the stay, having a large number of holes, being formed into a waveform and being provided within a height dimension of the bottom strength member. An air-cooled integrated refrigeration system, comprising: a perforated plate.