JPH07100277B2 - Heat exchanger - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchange device which is installed in a control panel of a machine tool or the like and cools air in the control panel.

2. Description of the Related Art At present, in the machine tool industry, there is a remarkable movement to increase machining accuracy and machining speed, and as a part of this, development of a highly efficient, compact and easy-to-use heat exchange device for control panels is desired.

A conventional example will be described with reference to FIGS. 7 to 9.

Reference numeral 1 is a control panel for machine tools and the like. A suction port 2 and a discharge port 3 are provided on the top surface of the control panel 1. Reference numeral 4 is a heat exchange device installed on the control panel. A horizontal partition plate 5 is arranged inside the heat exchange device 4, and the partition plate 5 has a plurality of fins 6 including an upper fin 6b on the upper part and a lower fin 6a on the lower part. The partition plate 5 has two spaces formed by closing the lower part by the inside air end plate 7 and the upper part by the outside air end plate 8. A space inside the heat exchange device 4 partitioned by the inside air end plate 7 and the partition plate 5 is a first space 9, and a space inside the heat exchange device 4 partitioned by the outside air end plate 8 and the partition plate 5 is a second space. Set to 10. An intake port 13 for outside air and a discharge port 14 for outside air are opened in the second space 10. First
A blower 11 for inside air is installed in the space 9, and a blower 12 for outside air is installed in the second space 10. The inside air blower 11 has a function of sucking the air in the control panel 1 through the suction port 2, passing through the lower fin 6a, and discharging the air from the discharge port 3 into the control panel 1. Further, the outside air blower 12 has a function of sucking outside air from the outside air suction port 13, passing through the upper fin 6b, and discharging the outside air from the outside air discharge port 14 to the outside.

In the above-described configuration, the temperature of the air inside the control panel 1 is much higher than the outside air temperature due to the heat generated by the electronic devices inside the control panel 1 (for example, when the outside air temperature is 30 ° C., the inside temperature of the control panel is 50 to 50).
Temperature rises to 60 ° C), but the first space 9 from the suction port 2
The heat of the air sucked into the lower fins 6a is guided to the upper fins 6b via the partition plate 5, further sucked from the outside air suction port 13 and released to the outside air flowing through the second space 10. As a result, the rise in the air temperature in the control panel 1 is suppressed, and the temperature is cooled to a temperature at which the reliability of the electronic devices in the control panel 1 can be maintained (for example, when the outside temperature is 30 ° C, the control panel internal temperature is 40 to 50 ° C). It

Problems to be Solved by the Invention However, the conventional example has the following problems. That is, in recent years, in NC machine tools and the like, in order to increase the processing speed, there is a remarkable movement to use a lubricating oil whose viscosity is remarkably reduced, and fine particles of the lubricating oil generated at that time float in the outside air. , It is sucked into the heat exchange device 4 for cooling the control panel and stays inside the fins 6b, so that the heat exchange performance of the fins 6 is significantly deteriorated, or the staying lubricating oil is trapped inside the heat exchange device. As a result of the accumulation, and a part of it infiltrating into the control panel and contaminating it, there is a problem that the control function of the machine tool or the like is adversely affected.

In view of the above problems, the present invention provides a structure in which the heat exchange performance of the fins in the heat exchange device is maintained and lubricating oil does not accumulate inside.

Means for Solving the Problems In order to solve the above problems, in the heat exchange device of the present invention, the partition plate is inclined downward as it goes from the outside air intake port side toward the outside air discharge port side, and the partition plate is inclined. Second close to the bottom
The drain is provided at the bottom of the space.

Effect The present invention makes the partition plate incline downward as it goes from the outside air suction port side to the outside air discharge port side, so that the lubricating oil attached to the upper fins flows down to the inclined lower end side of the partition plate, and By providing a drain at the bottom of the second space adjacent to the lower end of the slope, the lubricating oil flowing down can be discharged to the outside of the heat exchange device without being accumulated.

EXAMPLE A first example of the present invention will be described below with reference to FIGS. 1 to 3, but the same components as those of the conventional example will be denoted by the same reference numerals and detailed description thereof will be omitted. The partition plate 15 is inclined downward by a minimum of 3 ° from the outside air suction port 13 side toward the outside air discharge port 14 side. The partition plate 15 has a plurality of upper fins 16b in the upper direction and a plurality of fins 16 in the lower fin 16a in the lower direction.
It has Further, a contact plate 17 is provided on each of the lower part of the first space 9 and the upper part of the second space 10 so that the air and the outside air in the control panel 1 can effectively pass through the fins 16, respectively. 18
Is a drain, and the second space 10 near the inclined lower end of the partition plate 15
Provide at the bottom of the.

In the above configuration, the outside air blower 12 sucks the outside air from the outside air suction port 13, passes through the fins 16b, and discharges the outside air from the outside air discharge port 14 to the outside. At this time, fine particles of the lubricating oil contained in the outside air adhere to the surface of the upper fin 16b when passing through the upper fin 16b, but flow down from the upper fin 16b, and are further collected in the partition plate 15. It flows in the direction of the inclination of the partition plate 15. Since the drain 18 is provided in the direction of inclination of the partition plate, the collected lubricating oil is effectively discharged to the outside of the heat exchange device 1 through the drain 18.

As described above, according to the present embodiment, the partition plate 15 is inclined downward between the first space 9 and the second space 10 in the heat exchange device 4 from the outside air suction port 13 side toward the outside air discharge port 14 side. As a result, the lubricating oil such as cutting oil adhering to the second space 10 is caused to flow down the slope, and the heat exchange is performed through the drain 18 provided at the bottom of the second space 10 near the lower slope of the partition plate 15. It can be discharged to the outside without being accumulated in the device 4. Further, as a result, it is possible to prevent the deterioration of the heat exchange performance of the upper fins 16b caused by the remaining lubricating oil inside the heat exchange device 4 and the adverse effects on the control function caused by the infiltration contamination of the control panel 1. .

A second embodiment of the present invention will be described below with reference to FIGS. 4 to 6, but the same components as those of the first embodiment will be designated by the same reference numerals and detailed description thereof will be omitted. To do. The difference from the first embodiment is the upper surface of the partition plate 15 and the upper fins.
The point is that a non-adhesive film (eg, fluorocarbon resin coating) 19 is thinly applied to the surface of 16b.

In the above configuration, the operation is the same as that of the first embodiment, but the outside air containing fine particles of lubricating oil is in the second space 10.
And the lubricating oil adheres to the surface of the upper fin 16b,
Since the thin film of the non-adhesive film 19 is applied to the surfaces of the fins 16b, the lubricating oil has better fluidity than when it is not applied, and can easily flow downward. The lubricating oil flowing down flows in the direction of the inclination of the partition plate 15, but in this case as well, the fluidity is improved due to the thin film of the non-adhesive film 19 applied to the surface of the partition plate 15, and the partition plate 15 Easy to flow in the direction of inclination. Since the drain 18 is provided in the direction of inclination of the partition plate, the collected lubricating oil is effectively discharged to the outside of the heat exchange device 1 through the drain 18.

As described above, according to the present embodiment, as a result of applying the thin film of the non-adhesive coating 19 on the upper surface of the partition plate 15 and the surface of the upper fin 16b, the fluidity of the lubricating oil that adheres improves, and the second space 10
The lubricating oil that adheres to the upper fins 16b in the inside effectively flows down, and the lubricating oil that flows down into the partition plate 15 easily flows effectively in the direction of the inclination, and further accumulates in the heat exchange device 4 through the drain 18. The effect of discharging to the outside without
It is increased as compared with the first embodiment. Further, it is possible to reduce the inclination angle of the partition plate 15 as compared with the first embodiment, and in this case, the outer dimensions of the heat exchange device 4 can be reduced. In addition, the heat exchange performance of the fins 16 is deteriorated due to the lubricating oil remaining inside the heat exchange device 4, and the control panel 1
It is possible to prevent adverse effects on the control function caused by infiltration contamination.

Effects of the Invention As described above, the present invention provides a partition plate inside a heat exchange device,
By providing a drain for lubricating oil discharge at the bottom of the second space which is inclined downward from the outside air intake port side toward the outside air discharge port side and is close to the inclined lower end of the partition plate, the fin surface and partition Since the lubricating oil does not stay on the plate, the heat exchange performance of the fin is maintained without deterioration. Further, since the lubricating oil does not accumulate in the heat exchange device, the problem that the lubricating oil flows into the control panel when it accumulates and adversely affects the control function of the machine tool is solved.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of the heat exchange device according to the first embodiment of the present invention incorporated in a control panel of a machine tool or the like, and FIG. 2 is a cross-sectional view of the heat exchange device III-III ′ of FIG. , Fig. 3 is the second
FIG. 4 is a perspective view of the partition plate and fins assembled in the figure, FIG. 4 is a sectional view when the heat exchange device according to the second embodiment of the present invention is incorporated in a control panel of a machine tool, and FIG. Heat exchanger
Fig. 6 is a sectional view of IV-IV ', Fig. 6 is an assembled perspective view of the partition plate and fins of Fig. 5, and Fig. 7 is a sectional view of a conventional heat exchange device incorporated in a control panel of a machine tool or the like. 8 is a sectional view of the heat exchanger II-II 'shown in FIG. 7, and FIG. 9 is an assembled perspective view of the partition plate and fins shown in FIG. 1 ... Control panel, 4 ... Heat exchange device, 9 ... First space, 10
...... Second space, 15 ...... Partition plate, 16a …… Lower fin, 16b
…… Top fin, 18 …… Drain, 19 …… Non-adhesive film.

Claims (2)

[Claims] 1. A partition plate provided on the top surface of a control panel and provided with upper fins and lower fins, so that the air in the control panel is sucked from the suction port, passes through the lower fin, and is discharged from the discharge port. A heat exchange device for the control panel, which forms a first space for discharging into the control panel and a second space for which the outside is sucked from the outside air suction port and passes through the upper fins and is discharged from the outside air discharge port to the outside. The partition plate is inclined downward from the outside air suction port side toward the outside air discharge port side, and a drain is provided at the bottom of the second space near the inclined lower end of the partition plate. A heat exchange device characterized by. 2. The heat exchange device according to claim 1, wherein a thin film of a non-adhesive film is applied to the upper fin and the upper surface of the partition plate.