JP2019522165A - Cooling device for installation under the ceiling of the room - Google Patents

Abstract

The present invention relates to an air cooler for cooling the air in a room, in particular a storage room or a cooling room in which a person can walk, the air cooler being spaced from the bottom (1a), the ceiling of the room to be cooled. A housing (1) having a cover (1b) that can be fixed directly to the housing and at least one side wall (1c) in which at least one air outlet (2) is arranged, and being arranged in the housing (1) and being substantially horizontal Air sucked by the fan (4), comprising at least one flat heat exchanger (3) and at least one fan (4) arranged in the housing (1) for sucking air from the room to be cooled Flows through the flat heat exchanger (3) at least in a substantially vertical direction and is deflected horizontally by the fan (4) towards the air outlet (2). Placed directly on the ceiling so that it can be installed in a small space to cool the air in a large capacity storage room or cooling room, especially a storage room or cooling room where people can walk, In order to provide a very efficient air cooler that avoids dust accumulation, in the air cooler according to the invention, the fan (4) and the air outlet (2) are arranged above the heat exchanger (3). ing. [Selection] Figure 1

Description

  The invention relates to an air cooler according to the preamble of claim 1 and to a method for cooling room air, in particular air in a walk-in storage room or cooling room.

  A typical air cooler is used to cool the air in a large volume room, such as a walk-in storage room or cooling room. The air cooler used for this purpose is part of the storage room or cooling room equipment and is installed in it. An air cooler includes a heat transfer device, for example in the form of a heat exchanger, and the air to be cooled is guided through the heat transfer device (heat exchanger), in which case the heat exchanger takes heat away from the air. Cooling. The heat transfer device may be a heat exchanger having a tube or channel system traversed by a coolant or refrigerant. The heat transfer device may also be an evaporator having a tube or channel system traversed by a two-phase refrigerant. The evaporator tube or channel system is connected to a condenser (condenser) or recooler that is usually placed outside the room to be cooled, for example on the roof of the building where the storage or cooling room is located. The refrigerant is then charged only to the condenser or recooler after installation of a cooling system consisting of an air cooler located in the storage or cooling chamber and an external condenser or recooler. A condenser or recooler is connected via a pipeline to the evaporator of the air cooler to guide the liquid refrigerant through the evaporator under low pressure. When the indoor air of the storage room or the cooling room to be cooled flows through the evaporator, the liquid refrigerant is first evaporated to remove heat from the passing air. The evaporated refrigerant is returned to the condenser or recooler through the pipeline, where it is liquefied by compression and cooled.

  From Patent Document 1, an air conditioner is known in which a housing can be installed on a ceiling on which a radial fan is arranged. A radial fan draws in ambient air through an air inlet located at the bottom of the housing and blows out the drawn air radially through an air outlet located laterally within the housing. A heat exchanger is arranged at each air outlet, and the air blown out by the radial fan is guided through the heat exchanger and cooled. The radial fan and the heat exchanger are arranged at the same height as the air outlet arranged laterally in the housing.

  From patent document 2, another air conditioner of this type is known. The air conditioner also includes a housing that can be installed on the ceiling where the diagonal fan and heat exchanger are located. The diagonal fan sucks in ambient air through a suction opening located at the bottom of the housing where the heat exchanger is located. The sucked air flows through a substantially horizontal heat exchanger designed to be flat and is thereby cooled. The sucked and cooled air is guided obliquely upward by an oblique fan and is deflected by the guide element obliquely downward in the direction of an air outlet arranged laterally in the housing. The cooled air returns to the room through the air outlet.

  These known air conditioners are commonly used for air conditioning in small rooms such as homes and office rooms to produce a comfortable room temperature of 20-25 ° C. When such an air conditioner is used in a large-volume storage room or cooling room where a remarkably low cooling temperature of 16 ° C. or less should be generated, condensed water is generated in the air conditioner, particularly in a pipeline or a louver. There is a risk that it may drip from. If the fan is placed below the heat exchanger, water droplets due to condensation in the fan may be sprayed with the cooled air and blown out of the air outlet, creating undesirable water droplets in the room. This can also occur if the fan is operating at high power (high speed) and if the fan is located above the heat exchanger.

  A cooling system for a large volume room for a walk-in cooling room and a storage room is known from Japanese Patent Application Laid-Open No. H10-260260, and is disposed outside a room to be cooled and an evaporator disposed in a room to be cooled. And an external compressor connected to the evaporator through a downstream compressor. The refrigerant guided in the pipeline system is compressed by an external compressor, liquefied by a downstream condenser, and then sent in a liquid state to the evaporator through the pipeline. Before the refrigerant enters the evaporator, the liquid refrigerant flows through the expansion valve to expand the refrigerant. The cooling system is operated with either one-phase refrigerant or two-phase refrigerant, in which case the evaporator is as a simple heat exchanger when the system is operated with one-phase refrigerant and when operated with two-phase refrigerant. The refrigerant functions as an evaporator. The refrigerant expands and evaporates in the expansion valve, is heated by the passing ambient air, and then returned to the compressor in a gas state by the pipeline and liquefied again.

  The evaporation device then comprises a housing in which two microchannel evaporators are arranged. A flat air inlet covered by the ventilation grid frame and a flat air outlet covered by the ventilation grid frame are arranged in the housing, the air inlet and the air outlet are arranged on opposite walls of the housing, and the microchannel evaporator is in the middle Placed in. Several fans connected to the microchannel evaporator are also arranged in the housing to guide the air through the evaporator. For this purpose, ambient air is sucked in through the air inlet and blown out of the housing through the air outlet. Ambient air drawn by the fan passes by or through the microchannel evaporator and cools the air. The evaporator housing is then placed in a walk-in storage room or cooling room, or from the ceiling so that a free space allowing air inflow or outflow remains between the ceiling and the top of the housing. It can be placed suspended. However, a significant amount of space is required to install the housing on the storage room or floor of the cooling room, which is no longer available as a storage space. The arrangement in which the evaporator is suspended from the ceiling of the walk-in storage room or cooling room has the disadvantage that dust accumulates on the horizontal top of the housing in which the air inlet or air outlet is located. This is particularly a problem in food storage and cooling rooms, as the product to be stored becomes dirty and causes sanitary problems. Furthermore, the condensate of this evaporator dripping onto the pipelines and louvers on the microchannel evaporator can drip through the air outlet (or air inlet).

JP2009024936A JP06137558A US20060130517A1

  Starting from here, the problem underlying the present invention is to have a housing which is arranged on the ceiling of the room to be cooled and to be suspended from the above-mentioned disadvantages of the cooling devices known from the prior art, in particular. By providing a high-efficiency air cooler for cooling the air in large volumes, especially walk-in storage rooms or cooling rooms, which can avoid the accumulation of condensate and dust on the top of the cooling system is there. The air cooler must be as low as possible so that it can be installed in a space to be cooled in the room to be cooled so that it can be installed on the ceiling without significantly reducing the height of the room.

  This problem is solved by an air cooler having the features of claim 1 and a method for cooling room air having the features of claim 14. Preferred embodiments of the air cooler according to the invention are evident from the dependent claims.

  An air cooler according to the present invention comprises a bottom, a cover that can be directly fixed to the ceiling of a room to be cooled (room to be cooled) without any gap, and at least one side wall provided with at least one air outlet. , A flat design and at least one substantially horizontal heat exchanger disposed in the housing, and at least one fan disposed above the heat exchanger in the housing. The fan draws in ambient air from the room to be cooled through the air inlet, and the sucked air flows substantially vertically through the flat heat exchanger and is horizontally directed by the fan to the air outlet provided on the side wall of the housing. Deflected. The fan and air outlet are arranged above the heat exchanger according to the present invention.

  With this configuration, the sucked air flows through the flat heat exchanger, flows substantially perpendicular to the plane of the flat heat exchanger, flows out of the housing through at least one air outlet disposed on the side, You can return to This design ensures a large effective heat transfer surface and thus good heat transfer efficiency. Since the cooled air exits the housing through the at least one side air outlet in a generally horizontal flow direction, vertical air flow of the cooled air from the housing into the room to be cooled is also prevented. This prevents an unpleasant vertical air flow in the room to be cooled and allows a uniform distribution of the cooling air in the room.

  By arranging the cover of the housing directly on the ceiling of the room to be cooled without leaving a space between the ceiling of the room and the cover of the housing, dust is prevented from accumulating on the top of the cover.

  In the housing of the air cooler, the fan, the at least one air outlet and the heat exchanger arrangement according to the invention are arranged on the outer surface of the heat exchanger, in particular the finned coil heat exchanger or the microchannel evaporator louver and pipeline. Allows the construction of a basket to collect condensate that can be formed into For this purpose, preferably a recess is formed in the bottom of the housing or a collecting trough is arranged at the bottom inside the housing. Condensate that is formed on the outer surface of the heat exchanger and drops by gravity is collected in a recess at the bottom or a collection tub located at the bottom, and through a discharge line that discharges at the lowest point of the recess or the collection basin. Removed.

  The air inlet through which ambient air is drawn into the housing by the fan is preferably located below the heat exchanger and is provided on the side wall of the housing, as well as at least one air outlet. On the one hand, since all of the ambient air flowing into the housing passes through the heat exchanger, it is ensured that a very efficient heat transfer takes place. On the other hand, by providing at least one air inlet in the side wall of the housing, an unpleasant air flow in the vertical direction in the room to be cooled is prevented. A plurality of air inlets and a plurality of air outlets are preferably provided in the housing.

  The housing is designed as a cylinder and may have a side wall with a curved surface. In this embodiment of the air cooler according to the present invention, it is preferable to provide an air inlet and an air outlet at the diametrically opposed positions of the curved side walls. Where there are a plurality of air inlets and a plurality of air outlets, it is preferable to arrange them alternately and uniformly around the side wall of the cylindrical housing.

  The housing can also be designed as a rectangular parallelepiped with four side walls perpendicular to each other, in which case it is preferred that each side wall provided with an air outlet is not provided with an air inlet and vice versa ( That is, it is preferable that no air outlet is provided on each side wall provided with the air inlet). This prevents cooled air exiting the housing through the air outlet from being directly drawn into the housing by an air inlet located adjacent to the air outlet.

  The separation plate in which the air passage opening is formed is preferably disposed between a flat and substantially horizontal heat exchanger and the fan. The air passage opening of the separator plate is coplanar (aligned) with the fan, that is, the air passage opening extends coaxially with the rotational axis of the fan, and the diameter of the air passage opening substantially corresponds to the fan diameter. This diameter can typically range from 200 to 400 mm, but can be as much as 1200 mm. Ambient air sucked by the fan through the air inlet flows into the housing in a substantially horizontal direction, where it is deflected vertically by the partial vacuum generated by the fan in the region above the separation plate, and first flattened. It flows through the heat exchanger and then through the air passage opening in the separator plate and into the fan. The separator plate divides the interior of the housing into horizontal planes so that the ambient air sucked by the fan can flow almost completely vertically through the flat heat exchanger. Separating the interior of the housing with a separator plate separates the flow of ambient air drawn vertically into the heat exchanger from the flow of cooling air in a generally horizontal flow direction through at least one air outlet It will be certain by doing. This design avoids air swirling inside the housing and the resulting reduction in heat transfer efficiency.

  The heat exchanger can be designed as a microchannel evaporator as described in US 2006/0130517 A1, or alternatively as a finned coil heat exchanger. In both cases, the sucked air flows in parallel to the heat exchanger or evaporator louvers, i.e., in the case of finned coil heat exchangers, flows parallel to the heat exchanger louvers, and the microchannel evaporator In this case, the microchannel evaporator flows parallel to the louvers arranged in a zigzag between a plurality of parallel microchannels. In either case, the sucked air flows perpendicular to the flow direction of the refrigerant flowing through the heat exchanger tubes or channels. This design also ensures a large heat transfer surface and thus efficient heat transfer.

  These and additional features and advantages of the present invention will be apparent from the following examples, which are further described with reference to the accompanying drawings. The drawings show:

1 is a perspective view of a first embodiment of an air cooler according to the invention comprising a housing, a fan arranged in the housing, and a heat transfer device designed as a heat exchanger, the front side wall of the housing being It has been removed to depict the interior of the housing. It is a front view of embodiment of the air cooler by this invention of FIG. FIG. 2 is a perspective detail view of the heat exchanger and fan of the air cooler embodiment of FIG. 1, wherein the front and rear side walls, the cover, and the separator plate of the housing are not shown for more clarity. FIG. 2 is a detailed perspective view of the upper cross-section of the cover and side walls of the housing with the horizontal separator plate of the air cooler embodiment of FIG. 1, the heat exchanger not being shown for clarity. FIG. 5 is a perspective view (FIG. 5 a) of a heat exchanger of the air cooler embodiment of FIG. 1, and a schematic view of the air flow through the heat exchanger (FIG. 5 b). FIG. 4 is a perspective view of a second embodiment of an air cooler according to the invention with a heat exchanger designed as an evaporator, the front side wall of the housing being removed to depict the interior of the housing. FIG. 7 is a front view of one embodiment of an air cooler according to the present invention that is modified with respect to the embodiment of FIG. FIG. 8 is a detailed perspective view of a heat exchanger designed as an evaporator of the air cooler embodiment of FIGS. 6 and 7.

  FIGS. 1 to 5 show an air cooler for cooling the air in a large volume room, in particular a walk-in storage room and a cooling room or a cooled work room (especially in the food industry, for example in a slaughterhouse). The embodiment shown is a rectangular parallelepiped housing 1 comprising a horizontal bottom 1a, a cover 1b parallel to and spaced from the bottom 1a, and four side walls 1c perpendicular to each other and to the floor and the cover. including. A fan 4 and a heat exchanger 3 are arranged in the housing 1, and the heat transfer device 3 is designed as a heat exchanger in the embodiment of FIGS. The flat heat exchanger shown in detail in the perspective views of FIGS. 3 and 5 is disposed inside the housing in a horizontal posture. The fan 4 can be a radial fan or an oblique fan.

  Since the cover 1b can be directly fixed to the ceiling of the room to be cooled without a gap, the air cooler can be arranged without a gap between the cover 1b and the ceiling. This can be done, for example, by fixing the cover 1b to the bottom of the ceiling with a fixture or frame.

  The interior of the housing 1 is divided into a lower space and an upper space by a horizontal separation plate 6, the fan 4 is disposed in an upper space above the separation plate 6, and the heat exchanger 3 is disposed in a lower space below the separation plate 6. Is done. A circular air passage opening 6a is provided at the center of the separation plate 6. The air passage opening 6a is on the same plane as the fan 4 disposed above the separation plate 6, and the air passage opening 6a. Is arranged coaxially with the rotation axis of the fan 4 and has a diameter substantially corresponding to the diameter of the fan 4.

  A plurality of air inlets 5 are provided in the opposite side wall 1 c of the lower space of the housing 1. The air inlet 5 is formed by an opening in the side wall 1c. An air filter 9 is preferably arranged in each of these openings.

  The plurality of air outlets 2 are also in the form of openings in the side wall 1 c and are provided on the opposite side walls 1 c in the upper space of the housing 1. Outside the housing in the area of the air outlet 2, a plurality of guide slats (guide plates) 10 or jalousie-type louvers are arranged in parallel with each other in the vertical direction, and they face obliquely downward. The guide slats or jalousie louvers are preferably movable and preferably motor driven so that they can be closed, for example, during the thawing process.

  The bottom 1a includes a round recess that decreases towards the center and is connected at its deepest part to a discharge line not shown here.

  The heat transfer device 3 designed as a heat exchanger in this embodiment is shown in detail in FIGS. 3 and 5, the heat transfer device 3 including a plurality of distribution lines 3c, the distribution lines 3c being in the x direction. Extending parallel to the side wall 1c of the housing 1 and connected to a plurality of transverse lines 3b arranged perpendicular to the distribution line 3c (as shown in FIG. 5a). The transverse line 3b extends along the z direction. The plurality of louvers 3a are disposed across the transverse line 3b, extend in the xy plane, and are spaced apart from each other in the z direction. A coolant, such as a glycol-containing coolant, is guided by the distribution line 3c and the crossing line 3b. The distribution line 3c is connected to the coolant loop for this purpose, and the cooled coolant is guided through the coolant loop to the transverse line 3b and returns from the transverse line 3b for recooling. . The coolant loop includes a recooler for cooling the coolant, which is preferably located outside the room to be cooled, for example on the roof of the building.

  In order to cool the air in the storage or cooling chamber in which the air cooler is arranged, the ambient air is sucked in through the air inlet 5 by the rotary fan 4. The sucked air flows as a substantially horizontal inlet flow through the air inlet 5 into the lower space of the housing 1 and at least through the heat exchanger 3 due to the partial vacuum generated by the fan 4 in the upper space. It flows in a substantially vertical direction. When the sucked air flows through the heat exchanger 3, heat is taken from the air and the air is cooled. The heat removed from the air is absorbed by the coolant circulating in the heat exchanger, and the heated coolant coming from the heat exchanger 3 is transported to the recooler for recooling.

  The air flow through the heat exchanger 3 designed as a finned coil heat exchanger is shown schematically in FIG. 5b. The air sucked into the housing 1 flows in the vertical direction (y direction) through the flat heat exchanger 3, and then passes through the transverse line 3b through which the (cold) coolant flows. The louver 3a arranged across the transverse line 3b is formed of a heat conductive material such as metal, preferably aluminum, like the distribution line and the pipeline of the transverse line, and the air flow to be cooled and the heat exchanger 3 Increase the effective heat transfer surface to and from the pipeline. Thereafter, the air flows perpendicular to the flow direction of the coolant flowing through the transverse line 3b.

  The cooled air passes through the heat exchanger 3 and then flows through the air passage opening 6 a of the separation plate 6 into the upper space of the housing 1 where it is deflected in the horizontal direction by the fan 4. The horizontally deflected cooling air finally flows from the housing 1 through the air outlet 2 as a substantially horizontal outlet flow and is then deflected diagonally downward by the guide slats 10.

  The condensate (droplets) that can be formed on the pipeline and louver of the heat exchanger 3 drops by gravity, collects in the concave portion of the bottom 1a, and is taken out from the discharge line.

  The upper part of the housing 1 is shown in perspective view in FIG. 4 with the front side wall removed for clarity. The horizontal separation plate 6 having the central air passage opening 6a and the fan 4 disposed above the horizontal separation plate 6 are apparent from FIG. The heat exchanger located below the separator plate 6 is not shown in the depiction of FIG. 4 for clarity. A support plate 11 protruding inward for fixing the heat exchanger 3 to the housing 1 is formed on the side wall 1c. The side edge region of the heat exchanger 3, in particular the distribution line 3c of the heat exchanger 3, can be arranged and fixed on these support plates 11 in order to hold the heat exchanger 3 in a substantially horizontal position.

  Another embodiment of the air cooler according to the invention is shown in FIG. 6, but this embodiment corresponds to the embodiment of FIGS. 1 to 5 except for the heat exchanger 3. The heat exchanger 3 of the embodiment of FIG. 6 is designed as an evaporator, in particular as a microchannel evaporator. The heat exchanger 3 designed as a microchannel evaporator in the embodiment of FIG. 6 is shown in detail in FIG. This includes a plurality of side distribution pipes 3c extending in parallel with each other along the x direction, and the side distribution pipes 3c extend vertically (in the z direction) to the side distribution pipes 3c. Connected to the flat transverse channel 3d. The transverse channel 3d is divided into several (for example, 10 to 15) microchannels, each having a diameter or height / width of 1 to 2 mm. The two-phase refrigerant is guided to the microchannel of the transverse channel 3d through the distribution pipe 3c. A plurality of zigzag groovers 3e are arranged between transverse channels 3d that are spaced apart from each other in the x direction. The distribution pipe 3c is connected to an external compressor and a subsequent condenser through a pipeline system, and both the compressor and the condenser are arranged outside the room to be cooled, for example, on the roof of a building. The refrigerant is compressed by a compressor, liquefied by a subsequent condenser, and guided to the heat exchanger 3 through a pipeline system. An expansion valve is arranged upstream of the heat exchanger 3, and the first liquid refrigerant transported can be expanded and evaporated. When the expanded refrigerant passes through the microchannel of the microchannel evaporator, the refrigerant evaporates and absorbs heat from the air flowing through the heat exchanger 3. The air then flows through the microchannel evaporator in the vertical direction (y direction) parallel to the louver 3e and is cooled by releasing heat to the heat exchanger 3. The evaporated refrigerant of the microchannel evaporator returns from the transverse channel 3d to the distribution line 3c, from where it is returned to the compressor and subsequent condenser via the pipeline system, where it is compressed and liquefied again.

  Because the oil contained in the refrigerant used (this is required for compressor lubrication) is discharged from the pipeline and microchannel evaporator, in particular from the microchannel in the transverse line 3b, during the refrigerant exchange. In this embodiment, it is preferable to maintain a slight inclination of about 1 to 3 ° with respect to the horizontal, instead of accurately arranging the flat heat exchanger 3 at the horizontal position. When the heat transfer device is operated with a two-phase oil-containing refrigerant compressed by an external compressor arranged downstream, the heat exchanger 3 is slightly moved with respect to the horizontal during use of the heat exchanger as the heat transfer device. It is also recommended to tilt it.

  A modification of the embodiment of FIG. 6 is shown in FIG. The air cooler of the embodiment of FIG. 7 has a heat exchanger 3 designed as a microchannel evaporator, similar to the air cooler of FIG. Unlike the embodiment of FIG. 6 in which a recess is formed in the bottom 1a to collect condensate (as in the embodiment of FIG. 1), the embodiment of FIG. 8 is included. The collecting rod 8 is preferably slightly inclined with respect to the horizontal, for example, in an angle range of 1 to 5 °. The collection basin 8 includes a discharge line 12 on the inclined side so that condensate collected via the discharge line 12 can be removed and in particular discharged. The collecting trough preferably covers or projects beyond the contour of the heat exchanger located above the collecting trough so that the condensate dripping onto the heat exchanger pipelines and louvers can be collected completely. Are dimensioned.

  The present invention is not limited to the embodiments shown in the drawings. For example, a finned tube heat exchanger or evaporator can be used as a heat transfer device instead of a microchannel evaporator. The heat exchanger according to the above embodiment may be flat or curved, in particular concave. A plurality of fans and heat exchangers can also be arranged in the housing 1, in which case the heat exchangers and fans can preferably be arranged one above the other alternately (from bottom to top).

  The air cooler according to the present invention is preferably dimensioned to produce a heat output in the range of greater than 1 kW. This achieves a room temperature in the range of 4-16 ° C.

Claims (14)

  An air cooler for cooling air in a room, particularly a walk-in storage room or a cooling room, which can be directly fixed to the bottom (1a) and the ceiling of the room to be cooled without leaving a space. (1b) and at least one side wall (1c) provided with at least one air outlet (2), and a housing (1) arranged in the housing (1), designed to be flat and substantially horizontal At least one heat exchanger (3) installed and at least one fan (4) arranged in the housing (1) and for drawing air from the room to be cooled, the fan (4) The air sucked in by the air flows through the flat heat exchanger (3) in a substantially vertical direction and is deflected horizontally by the fan (4) towards the air outlet (2). In Serial fans (4) and said air outlet (2) is characterized in that it is arranged above the heat exchanger (3), air cooler.   2. Air cooler according to claim 1, characterized in that at least one air inlet (5) is provided in the housing (1) below the heat exchanger (3).   3. Air cooler according to claim 1 or 2, characterized in that at least one side wall (1c) is provided with an air inlet (5).   The housing has four side walls (1a, 1b, 1c, 1d), and each side wall (1a, 1b) provided with the side wall or air outlet (2) is provided with an air inlet (5). The air cooler according to claim 2 or 3, characterized in that the reverse is also true.   Any of claims 1 to 4, characterized in that a separating plate (6) having an air passage opening (6a) is arranged between the heat exchanger (3) and the fan (4). An air cooler according to claim 1.   6. The air cooler according to claim 5, wherein the air passage opening (6a) is flush with the fan (4) arranged above the separating plate (6).   The air sucked laterally through the air inlet (5) flows into the housing in a substantially horizontal direction where it is deflected vertically and flows vertically through the heat exchanger (3); 7. Air cooler according to claim 5 or 6, characterized in that it flows into the fan (4) vertically through the air passage opening (6a).   8. Air cooler according to any one of the preceding claims, characterized in that the heat exchanger (3) is designed as a microchannel or finned coil heat exchanger.   The sucked air flows through the heat exchanger (3) parallel to the louver of the finned coil heat exchanger or parallel to the zigzag groove of the microchannel heat exchanger. The air cooler according to claim 8.     The air cooler according to any one of claims 1 to 9, wherein the heat exchanger (3) includes a tube (3a) or a channel (3b) through which a refrigerant flows.   The sucked air flows through the heat exchanger (3) perpendicular to the flow direction of the refrigerant flowing through the tube (3a) or the channel (3b) of the heat exchanger (3). The air cooler according to claim 10, wherein:   12. Air cooler according to any one of the preceding claims, characterized in that the bottom (1a) has a recess or a trough (8) for collecting condensed water.   13. The air cooler according to claim 1, wherein the fan (4) is designed as a radial fan or an oblique fan.   A method of cooling air in a room, particularly in a walk-in type storage room or a cooling room, in which air to be cooled is sucked into a housing (1) of an air cooler provided with a fan (4) and is flattened. Through the heat exchanger (3) installed substantially horizontally, and blown out of the housing (1) by the fan (4) through at least one side air outlet (2), the fan (4 ) And the air outlet (2) are arranged above the heat exchanger (3), and the air sucked by the fan (4) passes through the flat heat exchanger (3) in a substantially vertical direction. And is deflected horizontally by the fan to the side air outlet (2).

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