JPH10184361A - Heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat exchanger which can prevent floating foreign substances from flowing-in from under a gap between heat exchangers and can be easily cleaned. SOLUTION: This exchanger has an oil cooler 20 (heat exchanger) and a radiator 21 (heat exchanger), support members 16, 17 for supporting these on the floor 13, a front net part 31A removably provided in front of the oil cooler 20, an upper net part 32 removably provided above a gap formed between the heat exchangers 20, 21, and 21 joining plate 24A provided in the side of the gap formed between the heat exchangers 20, 21. The front net part 31A is integrated with the upper net part 32 and the lower ends of the front net part 31A and the joining plate 24A are extended near the floor 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger in which a plurality of heat exchangers such as an oil cooler and a radiator are arranged, and more particularly to a heat exchanger in which foreign matter conveyed by cooling air enters the heat exchanger. It relates to a heat exchange device to prevent.

[0002]

2. Description of the Related Art Japanese Patent Application Laid-Open No. Hei 7-189699 discloses a conventional heat exchange apparatus of this type, which relates to a heat exchange apparatus provided in a hydraulic excavator. FIG. 6 is a partial cross-sectional view of a hydraulic excavator showing a schematic arrangement of the heat exchange device according to this known technique. In FIG.
The heat exchange device 100 includes a lower traveling body 2 having crawler tracks 2L and 2R, an upper revolving body 3 rotatably mounted on the lower traveling body 2, and a rotatable connection with the upper revolving body 3 for working front. It is provided in an engine room 9 of the excavator 1 having a boom 5 forming a part thereof. The engine room 9 is provided in the rear part of the cab 8 in the upper swing body 3, and includes an engine 11, a hydraulic pump 12 driven by the engine 11, and a heat exchange device in a space covered by the cover 10. 100, a so-called suction fan 15 driven by a crankshaft (not shown) of the engine 11, and an introduction plate 23 for guiding cooling air passing through the heat exchange device 100 to the fan 15. In such a configuration, the operating oil is pressurized by operating the engine 11 to drive the hydraulic pump 12, and the hydraulic oil is supplied to a traveling hydraulic motor (not shown) provided on the lower traveling body 2, A hydraulic motor for rotation (not shown) provided on the revolving unit 3 and a plurality of hydraulic cylinders (not shown) for operating a work front including the boom 5;
By operating these hydraulic actuators, the traveling of the lower traveling body 2, the turning of the upper rotating body 3, and various operations of the work front are performed. At this time, the cooling air induced by the fan 15 flows into the engine room 9 from the air intake port 10a formed in the cover 10 as shown by an arrow in FIG. Engine 11
, Cools it, and is discharged out of the engine room 9 through a discharge port 10 b formed in the cover 10.

FIG. 7 is an assembly perspective view of the heat exchange apparatus 100.
FIG. 8 is a diagram illustrating the arrangement of the entire heat exchange device. FIG.
8, the heat exchange device 100 includes an oil cooler 20 for cooling return oil from the hydraulic actuator described above.
And a radiator 21 for cooling the cooling water of the engine 11
Between the oil cooler 20 and the radiator 21 between the oil cooler 20 and the radiator 21. A bottom plate 25 provided at the lower side so as to be openable and closable via a hinge 25a; The control net 3 provided on the left and right sides on the front of the oil cooler 20
The slide guides 33 serve as guides at the time of attachment / detachment.

[0004] The oil cooler 20 and the radiator 21 are arranged in the flow direction of the cooling air, and are supported by the floor plate 13 of the engine room 9 via support members 16 and 17 near both ends in the width direction, respectively. When the fan 15 is operated and the cooling air is induced, the bottom plate 25 is rotated upward by the negative pressure in the cooling air flow path (see the arrow in FIG. 8), and the front end thereof contacts the lower part of the radiator 21 and the bottom oil 25 The space below the gap between the cooler 20 and the radiator 21 is closed. When the fan 15 is stopped, the bottom plate 25 is separated from the lower portion of the radiator 21 by its own weight, and opens below the gap between the oil cooler 20 and the radiator 21.

[0005] The control net 30 includes a front net-like member, for example, a front net 31, which covers the front surface (upstream of the cooling air) of the oil cooler 20 at the most upstream side of the cooling air, and an upper end of the front net 31. Oil cooler 2
An upper control means for covering an upper part of a gap formed between the radiator 21 and the radiator 21, for example, an upper net part 32 is provided. These front net portion 31 and upper net portion 32
Wire meshes 31b and 32b of a predetermined mesh number are attached to the openings at the center of the frames 31a and 32a, respectively. The area of the front net portion 31 is the oil cooler 20.
Is almost the same as the area on the front side. Each of the slide guides 33 has a U-shaped cross section, and forms a groove 33a in the longitudinal direction. When the control net 30 is installed, the left side 3 of the frame 31a is inserted into the groove 33a.
1aL and the right side portion 31aR, and
2 is brought into close contact with the upper surface of the oil cooler 20. At this time,
The tip of the upper net portion 32 extends to above the radiator 21 so as to completely cover the space above the oil cooler 20 and the radiator 21. Then, in this state, the plurality of thumb screws 34 screwed to the slide guide 33 are tightened, and the tips thereof are pressed against the left portion 31aL and the right portion 31aR of the frame 31a to fix the control net 30. With such a structure, it is possible to easily remove and attach the control net 30 while preventing the displacement thereof. The connection plates 24, 24 cover the sides of the gap formed between the oil cooler 20 and the radiator 21, and function as side control means for preventing intrusion of floating foreign matter from here.

In the heat exchange apparatus 100 having the above-described structure, when the fan 15 in the engine room 9 is operated to induce cooling air, floating foreign substances conveyed by the cooling air are removed from the control net 30.
And is controlled without getting inside. At this time, the bottom plate 25 rotates upward and closes the lower part of the gap between the oil cooler 20 and the radiator 21 to prevent the intrusion of floating foreign matters from the oil cooler 20 and the radiator 21. Of the fins (not shown). In addition, among those conveyed by the cooling air, there are floating foreign matters, dust, and the like that are fine enough to pass through the control net 30. When these are dry without stickiness, they are conveyed as they are to the cooling air and discharged to the outside of the heat exchange device 100, or the fan 15 stops after staying between the oil cooler 20 and the radiator 21. Then, when the bottom plate 25 is opened, it falls from there and is discharged. On the other hand, if the floating foreign matter or dust is sticky or wet, it adheres to the fins of the oil cooler 20 or the radiator 21, so that the fins are periodically cleaned and cleaned. Remove deposits. When performing this cleaning, after removing the control net 30, an air blow nozzle is inserted from above into the gap between the oil cooler 20 and the radiator 21, and the oil cooler 2 is removed.
And pressurized air is blown toward the radiator 21 and
Foreign matter adhering to the fins and the like is purged and discharged from the opened bottom plate 25. Thus, the cleaning operation can be easily performed by making the control net 30 detachable.

[0007]

In the above-mentioned prior art, the provision of a bottom plate 25 rotatable by a negative pressure in the cooling air flow path prevents foreign substances from entering from below when the cooling air flows, and At the time of cleaning, foreign matter is discharged only by a simple operation of removing the control net 30 and sending pressurized air.
However, when the engine speed is low, for example, when the hydraulic excavator is idling, the rotation speed of the fan 15 decreases and the amount of cooling air decreases, so that the pressure difference between the cooling air flow passage side and the outside decreases, and the bottom plate 25 May not rotate sufficiently upward. In this case, since the lower part of the gap between the oil cooler 20 and the radiator 21 is not sufficiently closed, floating foreign matter flows in from here and adheres to the fins of the oil cooler 20 and the radiator 21 and obstructs the flow of cooling air. Cooling efficiency may be reduced. Also,
Since the movable bottom plate 25 has a structure hanging from the lower portion of the oil cooler 20, care must be taken in handling in an assembling process, and workability may be deteriorated.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and a first object of the present invention is to provide a heat exchange apparatus which can surely prevent inflow of floating foreign matter from below a gap between heat exchangers. A second object is to provide a heat exchange device that can improve workability in an assembly process.

[0009]

In order to achieve the first and second objects, according to a first concept of the present invention, a plurality of heat exchangers are arranged at predetermined intervals in a flow direction of cooling air. And a plurality of support means for supporting the plurality of heat exchangers with respect to the floor surface, respectively, and a plurality of heat exchangers which are detachably provided at a front position of a most upstream side of the cooling air among the plurality of heat exchangers. A front net-like member for preventing intrusion of floating foreign matter, an upper control means provided detachably at a position above a gap formed between the plurality of heat exchangers, for preventing intrusion of floating foreign matter, Heat exchange provided at a lateral position of a gap formed between the heat exchangers and having a lateral control means for preventing intrusion of floating foreign matters, and integrating the front net-like member and the upper control means with each other In the apparatus, the front mesh member and the side control means The lower end, the heat exchange device is provided which is characterized in that it has extended to the vicinity of the floor surface. That is, of the plurality of heat exchangers arranged at predetermined intervals, a front mesh member is provided at a position in front of the most upstream heat exchanger, and an upper control is provided at a position above the gap between the heat exchangers and at a side position. Means and lateral control means are provided. At this time, these heat exchangers are supported by the support means with respect to the floor surface, and a gap is formed between the heat exchanger and the floor surface. By extending to the vicinity, control in this gap is also possible. Therefore, when the cooling air flows in from the upstream side, even if the floating foreign matter conveyed by the cooling air attempts to flow into the inside of the heat exchange device, it is blocked and controlled by the front mesh member, the upper control means, and the side control means. You. However, some of the fine foreign substances enter the heat exchange apparatus through the front net-like means, etc., but if they are not sticky and dry, they are conveyed to the cooling air as they are and Is discharged to the outside. On the other hand, if the foreign matter that has passed through the front net-like means or the like is sticky or wet, it will adhere to the inside of the heat exchanger, so it is necessary to periodically clean the heat exchanger to remove the adhered matter. Here, in the present invention, since the front net-like member and the upper control means are detachable and integrated with each other, they are integrally removed during this cleaning to expose the gap between the heat exchangers. The cleaning operation can be easily performed by inserting the cleaning device from the above. Further, the gap at the lower part of the plurality of heat exchangers is covered with a front net-like member and side control means extending to near the floor,
Foreign matter is blocked regardless of the cooling air volume. Therefore, unlike the conventional structure in which the lower part of the gap of the heat exchanger is closed by the rotating bottom plate, even when the cooling air flow is small, the foreign matter blocking function does not decrease. It can be reliably prevented. Further, in the conventional structure, since the rotating bottom plate is hung below the gap of the heat exchanger, it is necessary to take care of handling in an assembling process, and there is a possibility that workability may be deteriorated. Since there is no such concern, workability can be improved.

According to a second aspect of the present invention, there is provided a heat exchanger having a plurality of heat exchangers arranged at predetermined intervals in a flow direction of cooling air. A front net-like member that is detachably provided at a front position of a device located on the most upstream side of the cooling air to prevent intrusion of floating foreign matter, and at a position above a gap formed between the plurality of heat exchangers. An upper control means that is detachably provided and prevents intrusion of floating foreign matter; and a lateral control means that is provided at a lateral position of a gap formed between the plurality of heat exchangers and prevents intrusion of floating foreign matter. And a heat exchange device in which the front mesh member and the upper control means are integrated with each other, the heat mesh device being detachably provided at a position below a gap formed between the plurality of heat exchangers, and It is connected to the member freely and can float There is provided a heat exchange device comprising: a lower control means for preventing entry of an object; and fixing means for detachably fixing the lower control means to a lower portion of at least one of the plurality of heat exchangers. You. That is, a front net-like member is provided at the front position of the most upstream heat exchanger, and upper control means and lower control means are provided at positions above and below the gaps between the heat exchangers. Accordingly, when the cooling air flows in from the upstream side, the floating foreign matter conveyed by the cooling air is blocked and controlled by the front net-like member, the upper control means, and the lower control means. The front mesh member, the upper control means, and the lower control means are all detachable, and the front mesh member and the upper control means are integrated, and the lower control means is connected to the front mesh member. Therefore, at the time of cleaning, these can be removed at once to expose the gap between the heat exchangers, and the cleaning device can be easily inserted by inserting the cleaning device from above. At this time, since the lower control means is connected to the front mesh member so as to be freely bent, the angle between the lower control means and the front mesh member can be freely adjusted, and the lower control means can smoothly adjust the clearance between the heat exchangers. It can be mounted at the lower position, and the lower control means is fixed to the lower part of the heat exchanger by the fixing means, so that entry of foreign matter can be blocked regardless of the cooling air volume. Therefore, unlike the conventional structure in which the lower part of the gap of the heat exchanger is closed by the rotating bottom plate, the foreign matter blocking function does not decrease even when the cooling air flow is small,
Foreign matter can be reliably prevented from flowing from below the gap of the heat exchanger.

[0011] Preferably, in the above heat exchanging apparatus, the upper extermination means is a net-like member.

Preferably, in the above heat exchanger, the lateral control means is a plate material.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. Members equivalent to those in FIGS. 6 to 8 showing the conventional structure are denoted by the same reference numerals, and description thereof will be omitted. A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is an assembled perspective view of the heat exchange device according to the present embodiment, and FIG. 2 is a diagram for explaining the arrangement of the entire heat exchange device, which respectively correspond to FIGS. 7 and 8 of the conventional structure. In FIGS. 1 and 2, what is particularly different from the conventional structure is that the bottom plate 25 provided below the gap between the oil cooler 20 and the radiator 21 is omitted, the front net portion 31 of the control net 30, and the slide guide. 33,3
3, and increase the length of the connecting plates 24, 24, etc. in the vertical direction,
That is, their lower ends extend to the vicinity of the floor plate 13. Those members are distinguished by adding an A to the corresponding reference numerals. Other structures are almost the same as the conventional structure.

In this embodiment, the oil cooler 20
The sides of the gap between the radiator 21 and the connecting plates 24A, 24
A, the cooling air flows through the oil cooler 2
0, and from above the gap between the oil cooler 20 and the radiator 21. At this time, floating foreign matter conveyed by the cooling air tends to flow into the heat exchange device, but is blocked and prevented by the front net portion 31A and the upper net portion 32 of the control net 30. However, foreign matters finer than the stitches of the wire meshes 31Ab and 32b pass through the control net 30 and enter the inside of the heat exchange device. If they are dry without stickiness, they are conveyed as they are to the cooling air and pass through the oil cooler 20 and the radiator 21 to be discharged to the outside of the heat exchanger, or after passing through the oil cooler 20, the lower part of the radiator 21 It is discharged from the gap to the outside of the heat exchange device. On the other hand, if the foreign matter that has passed through the control net 30 is tacky and wet, the oil cooler 2
In order to adhere to a large number of fins (not shown) provided in the inside of the radiator 21 and the radiator 21, cleaning is periodically performed to remove the adhered matter. Here, in this embodiment, since the control net 30 composed of the front net portion 31A and the upper net portion 32 is detachable, it is detached during this cleaning to remove the oil cooler 20 and the radiator 21.
The gap between them can be exposed. In this state, an air blow nozzle is inserted from above the gap to blow pressurized air to purge foreign matters adhering to the fins and the like and discharge the foreign matter from the gap below the radiator 21. Thus, the cleaning operation can be easily performed by making the control net 30 detachable. At this time, the gap between the oil cooler 20 and the lower portion of the radiator 21 is formed by the front net portion 31A and the connecting plates 24A, 24A extending to near the floor.
A prevents foreign matter from entering regardless of the amount of cooling air. Therefore, unlike the conventional structure (see FIG. 8) in which the lower part of the gap of the heat exchanger is closed by the rotating bottom plate 25, the foreign matter blocking function does not decrease even when the cooling air flow is small, and the oil cooler 20 and the radiator 21 Foreign matter can be reliably prevented from flowing from below the gap. Further, in the above-described conventional structure, since the movable bottom plate 25 is hung below the oil cooler 20, it is necessary to take care of handling in the assembling process and the workability may be deteriorated. There is no such concern in form.

A second embodiment of the present invention will be described with reference to FIGS. FIG. 3 is an assembled perspective view of the heat exchange device according to the present embodiment, and FIG. 4 is a diagram for explaining the arrangement of the entire heat exchange device, which respectively correspond to FIGS. 7 and 8 of the conventional structure. 3 and 4, the difference from the conventional structure is that the bottom plate 25 provided below the gap between the oil cooler 20 and the radiator 21 is omitted, and the lower end of the front net portion 31 of the control net 30 is omitted. The lower control means, for example, the lower net part 35 is connected, and the lower net part 35 is connected to the fixing means, for example, the lower net part 3.
5 is to be detachably fixed to the lower part of the radiator 21 by using a thumbscrew 36 screwed to 5. Lower net 35
Is connected to the front net portion 31 via a hinge 37 so as to be freely bendable. Like the front net portion 31 and the upper net portion 32, a wire mesh 35b of a predetermined mesh number is attached to the opening at the center of the frame 35a. Have been. When the control net 30 is mounted, the left portion 31a of the frame 31a is positioned behind the left portion 35aL and the right portion 35aR of the frame 35a with respect to the groove 33a of the slide guide 33.
The upper net portion 32 is brought into close contact with the upper surface of the oil cooler 20 while the frame 35a is inserted into the gap below the oil cooler 20 while the aL and the right portion 31aR are inserted. Then, the lower net 35 is rotated with the hinge 37 as a fulcrum, and the end is brought into close contact with the lower part of the radiator 21 so that the thumb screw 3
Fix with 6. Other structures are almost the same as the conventional structure.

In the present embodiment, as in the first embodiment, the cooling air flows in from the front side of the oil cooler 20 and from above the gap between the oil cooler 20 and the radiator 21, but the floating air conveyed by the cooling air flows. Even if foreign matter tries to flow into the heat exchanger, the foreign matter is blocked and controlled by the front net portion 31, the upper net portion 32, and the lower net portion 35 of the control net 30. When cleaning, set the thumbscrew 3
By removing 6, the front net portion 31, the upper net portion 32, and the lower net portion 35 can be integrally removed to expose the gap between the oil cooler 20 and the radiator 21. Therefore, as in the first embodiment, the cleaning operation can be easily performed. At this time, since the lower net portion 35 is connected to the front net portion 31 so as to be freely bent, the angle between the lower net portion 35 and the front net portion 31 can be freely adjusted to smoothly move the lower net portion 35 to the oil cooler. 20 and the lower part of the radiator 21. The lower part of the gap between the oil cooler 20 and the radiator 21 is covered with a lower net portion 35 fixed with a thumbscrew 36, thereby preventing foreign matter from entering regardless of the cooling air volume. Therefore, the rotation bottom plate 25 is moved below the gap of the heat exchanger.
Unlike the conventional structure (see FIG. 8), the foreign matter can be reliably prevented from flowing from below the gap between the oil cooler 20 and the radiator 21. In the second embodiment, the thumb screw 36 is used as fixing means for detachably fixing the lower net portion 35 to the radiator 21, but the present invention is not limited to this. For example, FIG.
Using the locking device 70 shown in FIG.
5 may be fixed to the radiator 21. Further, a magnet used for a door or the like of an audio board may be used. In these cases, a similar effect is obtained. In the second embodiment, the lower net 35 is fixed to the radiator 21 only. However, the present invention is not limited to this, and the lower net 35 may be fixed to the lower part of the oil cooler 20. In this case, a similar effect is obtained. Further, in the first and second embodiments, the case where the fan 15 is a so-called suction type is taken as an example. However, the concept of the present invention can be applied to a structure using a discharge type fan, In this case, a similar effect is obtained.
In the first and second embodiments, the control net 30 is provided with the upper net portion 32 to take in the cooling air from above the gap between the oil cooler 20 and the radiator 21 and to connect the connecting plate 24A (or 24). Is provided on the side so that cooling air is not taken in from the side of the gap between the oil cooler 20 and the radiator 21, but the present invention is not limited to this. That is, instead of the upper net portion 32, a plate material such as the connecting plate 24 is connected to the front net portion 31A (or 31) as an upper control means for covering above a gap formed between the oil cooler 20 and the radiator 21. Alternatively, a net-like member such as an upper net portion 32 may be fixed in place of the connecting plate 24A (or 24) as a side control means for covering the side of the gap between the oil cooler 20 and the radiator 21. May be. Further, instead of the lower net portion 35 in the second embodiment, a plate material such as the connecting plate 24 may be connected to the front net portion 31A (or 31) so as to be freely bent. At this time, it is preferable that the periphery of the end portion of the plate-shaped member be laid with urethane or the like, for example. In these cases, a similar effect is obtained. Further, in the first and second embodiments, the oil cooler 2 is used as the heat exchanger.
Although only the radiator 21 and the radiator 21 are arranged, the invention is not limited to this. For example, three or more heat exchangers are arranged including a condenser of an air conditioner in a cab 8 of a hydraulic shovel, an intercooler for pre-cooling intake air of an engine, and the like. You may. In these cases, a similar effect is obtained. Further, in the first and second embodiments, the front net portion 31A (or 31) and the upper net portion 32 are provided continuously, but in this manufacturing method, these are manufactured separately and retrofitted. They may be integrated or may be integrally formed from the beginning. Alternatively, a method may be used in which only the frames 31a (or 31Aa) and 32a are integrally formed, and the wire nets 31Ab (or 31b) and 32b are attached later to be integrated. In these cases, a similar effect is obtained. Further, in the first and second embodiments, the heat exchanging device provided in the engine room of the hydraulic shovel, which is a construction machine, has been described as an example. However, the present invention is not limited thereto, and other construction machines, Alternatively, the present invention can be applied to a heat exchange device mounted in an engine room of an automobile, an agricultural machine, or another machine. In these cases, a similar effect is obtained.

[0017]

According to the present invention, the cleaning operation can be easily performed by exposing the gap between the heat exchangers during cleaning and inserting the cleaning device from above. In addition, even when the cooling air volume is small as in the conventional structure in which the lower part of the gap of the heat exchanger is closed by the rotating bottom plate, the foreign matter blocking function does not decrease, so that the inflow of foreign matter from below the gap of the heat exchanger is ensured. Can be prevented.

[Brief description of the drawings]

FIG. 1 is an assembled perspective view of a heat exchange device according to a first embodiment of the present invention.

FIG. 2 is a diagram illustrating an arrangement of the entire heat exchange device shown in FIG.

FIG. 3 is an assembled perspective view of a heat exchange device according to a second embodiment of the present invention.

FIG. 4 is a diagram illustrating an arrangement of the entire heat exchange device shown in FIG. 3;

FIG. 5 is a diagram illustrating a modification of the fixing means.

FIG. 6 is a partial sectional view of a hydraulic excavator showing a schematic arrangement of a heat exchange device according to a known technique.

FIG. 7 is an assembled perspective view of the heat exchange device shown in FIG. 6;

FIG. 8 is a view for explaining the arrangement of the entire heat exchange device shown in FIG. 6;

[Explanation of symbols]

Reference Signs List 13 floor plate (floor surface) 16, 17 support member 20 oil cooler (heat exchanger) 21 radiator (heat exchanger) 24, 24A connecting plate (side control means, plate material) 30 control net 31, 31A front net portion (front) Upper net part (upper control means, net member) 36 Thumb screw (fixing means) 100 Heat exchanger

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI F28F 9/00 F28F 9/00 E

Claims (4)

[Claims] A plurality of heat exchangers arranged at predetermined intervals in a flow direction of cooling air; a plurality of support means for supporting each of the plurality of heat exchangers with respect to a floor surface; A front net-like member that is detachably provided at a front position of a device located on the most upstream side of the cooling air to prevent intrusion of floating foreign matter, and at a position above a gap formed between the plurality of heat exchangers. An upper control means that is detachably provided and prevents intrusion of floating foreign matter; and a lateral control means that is provided at a lateral position of a gap formed between the plurality of heat exchangers and prevents intrusion of floating foreign matter. In the heat exchanger device having the front mesh member and the upper control means integrated with each other, the lower ends of the front mesh member and the side control means are extended to near the floor surface. Characterized heat exchanger device. 2. A plurality of heat exchangers arranged at predetermined intervals in a flow direction of a cooling air, and detachably provided at a position in front of one of the plurality of heat exchangers on the most upstream side of the cooling air. A front net-like member for preventing intrusion of floating foreign matter, an upper control means provided detachably at a position above a gap formed between the plurality of heat exchangers, for preventing intrusion of floating foreign matter, Heat exchange provided at a lateral position of a gap formed between the heat exchangers and having a lateral control means for preventing intrusion of floating foreign matters, and integrating the front net-like member and the upper control means with each other In the apparatus, a lower control means which is provided detachably at a position below a gap formed between the plurality of heat exchangers, and which is connected to the front net-like member so as to be freely bent and which prevents intrusion of floating foreign matter, The plurality of lower control means Heat exchanger, characterized in that it comprises a fixing means for detachably fixing at least one lower of the heat exchanger. 3. A heat exchanger according to claim 1, wherein said upper control means is a mesh member. 4. The heat exchange device according to claim 1, wherein said lateral control means is a plate.