JPH0722872B2 - Machine tool control panel - Google Patents

Description

The present invention relates to a control panel of a machine tool such as an electric discharge machine, a laser machine, or the like, and more specifically, an NC control including a whole or high density printed circuit board. The present invention relates to a control panel of a machine tool, in which a region for housing a unit is hermetically sealed in a dustproof manner and a heat exchanger for indirectly vacating the hermetically sealed region is provided.

Furthermore, the present invention relates to a control panel of a machine tool such as an electric discharge machine, a laser machine, etc., in particular, in order to cool electronic and electric devices in the control panel installed in close contact with the machine tool, natural convection ventilation or The present invention relates to a machine tool control panel having an exhaust port for forced convection ventilation.

[Prior Art] FIG. 7 is a vertical sectional view showing a conventional example of a control panel of a machine tool such as an electric discharge machine or a laser machine.

In the figure, the housing (2) of the control panel (1) is provided with doors (3), (4) having dust-proof packing (not shown) on both left and right sides so that the inside of the housing (2) can be approached from both sides. Is configured. (5) is a processing power supply control unit housed in the housing (2), (6) is an NC control unit, (7) is a servo amplifier, and (8) is a control transformer. (9) is an I / O case attached to the opening of the door (4).
A transmission connector and the like are arranged in the case (9). The heat exchanger (10) is attached to the inner surface of the door (3).

The control units (5) and (6) described above are mounted on the mounting bracket (11
The servo-on (7) is attached back to back with the control units (5) and (6) via the mounting brackets (11b), and is installed from the right side of the figure via a), respectively. 3) can be opened for wiring and maintenance. In addition, operation parts such as a CRT and a seat key switch (not shown) are generally provided on the front side of the housing (2). In addition, the heat exchanger (10) has a box-shaped case (1
2) A heat transfer plate (13) having a plurality of flow paths formed by bending it into a corrugated shape, and an outside air fan (14) and an inside air fan (15) above and below the heat transfer plate (13). ) The upper and lower end surfaces of the channel are alternately sealed.

On the other hand, there are no relatively high-density mounting boards in the control board that houses electronic and electrical equipment that has a large amount of heat dissipation such as power boards and stabilized power supplies, or in the area that houses them, because of the economic reasons for cooling, etc. Forced convection ventilation has been conventionally adopted.

Such a control panel is generally provided with an intake port in the lower part of the housing, and the disclosed ceiling exhaust port is provided in the ceiling. A plurality of elongated ceiling exhaust ports consisting of a large number of slits are arranged in parallel on the ceiling plate of such a housing, and an exhaust duct having a substantially U-shaped cross section is attached to the lower surface of each ceiling exhaust port. Vertical exhaust ports consisting of a large number of slits are formed on the left and right vertical legs.

Next, the operation will be described. As shown in FIG. 7, the air outside the control panel and the air inside the control panel alternately convect in the flow path of the heat transfer plate (13). At this time, the air outside the control panel is moved by the outside air fan (14), and the air inside the control panel is moved by the inside air fan (15) in the a and b directions, respectively. Therefore, the air outside the control panel and the air inside the control panel exchange heat via the heat transfer plate (13), and the inside of the control panel (1) is indirectly cooled.

In a control panel with forced convection ventilation, the hot air inside the housing enters the exhaust duct through the vertical exhaust ports on the left and right of the exhaust duct, merges, and is exhausted upward from the ceiling exhaust port, Is cooled directly.

[Problems to be Solved by the Invention] The control panel (1) of a machine tool configured as described above is usually arranged side by side on the side of the machine tool, but the door (between the machine tool and the control panel (1) ( Since there is a need for the opening and closing of 3) and a space for maintenance and inspection of the internal storage equipment, there is a problem that the entire installation floor area including mechanics becomes large.

Also, in a control panel with forced convection ventilation, the hot air exhausted upward spreads laterally, giving thermal distortion to the machine tools installed in close contact, reducing pressure loss at the ceiling exhaust port, and reducing water droplets. There was a problem that intrusion prevention was not carefully considered.

The present invention has been made to solve the above problems, and can be installed almost in close contact with a machine tool, yet does not have a thermal effect on the machine tool, and is compact and easy to maintain and inspect storage equipment. The purpose is to obtain a machine control panel.

[Means for Solving the Problems] A control panel for a machine tool according to the present invention has the following configuration. That is, one side wall has a dust-tightly sealed area for housing a control unit composed of a mounting board in a housing provided near the machine tool with a space for intake air, and the sealed area is , A machine tool indirectly air-cooled by a heat exchanger that forces forced convection of outside air and inside air in the air passage defined by the heat transfer plate into an outside air passage and an inside air passage Control panel of the heat exchanger,
The air passage wall on the outside air flow path side is installed so as to project into the closed area with the opening formed on one side wall of the housing closed, and the upper part for exhaust formed on the ceiling surface of the housing. A wind tunnel connected to the opening is continuously provided in the outside air flow path, and a forced convection fan for outside air is arranged inside the wind tunnel.

Further, in the exhaust opening formed on the ceiling surface in the sealed area of the housing, an exhaust gap formed by a plurality of cross rails having a substantially Z-shaped cross section is slanted door-shaped and obliquely opposite to the machine tool. An exhaust louver is provided.

Further, a door is provided on the opposite side of one side wall in the closed area of the housing, and the heat-generating device is attached to the inner surface of the door by hermetically sealing the heat sink portion to a box-shaped mounting base. Wind windows are provided at a plurality of locations, and a cooling fan for directly cooling the heat sink is provided at a location facing one of the wind windows in the mounting base.

In addition, an open area adjacent to the sealed area, which accommodates heat-generating equipment with a large amount of heat dissipation, is provided in the housing, an intake port equipped with a dust filter is provided below the open area, and an exhaust port is provided on the ceiling. In addition, the exhaust port is provided with an armored door-shaped exhaust louver in which an exhaust gap formed by a plurality of cross rails having a substantially Z-shaped cross section faces diagonally opposite to the machine tool.

[Operation] In the present invention, the air passage wall surface on the outside air flow passage side of the heat exchanger forms the machine tool side wall surface of the housing. In the outside air flow path, the forced convection fan arranged in the upper wind tunnel section forcibly introduces the air outside the control panel and exhausts it from the exhaust opening on the ceiling surface of the housing. The air in the outside air flow path, which has exchanged heat with the air in the inside air flow path through the hot plate, is immediately discharged without staying. For this reason, the air passage wall surface on the outside air flow passage side is not heated by the high temperature air after heat exchange, and does not adversely affect the machine tool thermally. Therefore, the control panel can be placed closer to the machine tool.
Further, the inside air in the sealed area is cooled by the outside air through the heat transfer plate while passing through the inside air flow path separated from the outside air flow path by the heat transfer plate, and is forcibly circulated inside the sealed area to be mounted. Etc. are directly cooled, so that the mounting substrate and the like in the sealed area are efficiently cooled. That is, the heat exchanger indirectly cools the sealed area via the heat transfer plate, but the mounting substrate and the like in the sealed area are directly cooled by the internal air forcedly circulated inside the sealed area.

Further, an exhaust gap formed by a plurality of horizontal rails having a substantially Z-shaped cross section is directed diagonally in the opposite direction to the machine tool at the exhaust opening on the top surface of the housing, which is the exhaust port of the outside air flow path. By providing the armored door type exhaust louver, the hot air exhausted above the sealed area can be efficiently guided in the direction away from the machine tool. For this reason, the pressure loss at the ceiling exhaust port is reduced, and even if the exhausted high temperature air diffuses, it does not reach the nearby machine tool, and there is no adverse thermal effect. In addition, in an armored exhaust louver formed of a plurality of substantially Z-shaped cross rails, the upper and lower sides of the Z-shaped cross rail are vertically overlapped with each other so that adjacent ones of the eaves and the gutter, respectively. Since it plays a role, it is possible to prevent water droplets, dust, etc. falling at a normal inclination angle from entering the outside air flow path of the heat exchanger.

Furthermore, a door is provided on the opposite side of the one side wall in the sealed area of the housing, and the heat generating device is attached to the inner surface of the door by hermetically sealing the heat sink portion to a box-shaped mounting base. By providing wind windows at a plurality of locations and providing a cooling fan for directly air-cooling the heat sink section at a location facing one of the wind windows in the mounting base,
The main body of the heat generating device can be housed in a sealed area together with the mounting board, etc., and it can be cooled by both the inside air forcedly circulated inside the sealed area and the outside air introduced into the mounting base by a cooling fan. You can

Further, in the housing, an open area is provided adjacent to the closed area to accommodate a heat-generating device with a large amount of heat dissipated, an intake port with a dust filter is provided at the bottom of the open area, and an exhaust port is provided in the ceiling part. By providing an armored door-shaped exhaust louver with an exhaust gap formed by a plurality of horizontal cross-sections with a substantially Z-shaped cross-section diagonally opposite to the machine tool at the exhaust port, a heat-generating device with a large amount of heat dissipation can be provided. It can be cooled directly by the introduced outside air to prevent heating of the housing wall surface, and the high temperature air exhausted above the open area can be efficiently guided in the direction away from the machine tool. Can be placed close together. In addition, the door louver exhaust louver can prevent water droplets, dust, and the like that fall at a normal inclination angle from entering the open area.

[Embodiment of the Invention] FIG. 1 is a perspective view of an embodiment of the present invention, and FIG. 2 is I- of FIG.
I sectional view, FIG. 3 is a sectional view taken along line II-II of FIG. 2, and FIG. 4 is an enlarged sectional view of a main part of FIG. In FIG.
(20) is a control panel, and the housing (21) is an operation section area (22), a control section area (23), and a machining power supply section area (24) sequentially from the front side.
It is divided into The operation section area (22) and the control section area (23) are dust-tightly configured as a closed area and are indirectly cooled by using a heat exchanger. The processing power supply area (24) contains processing power supply devices such as power boards and stabilized power supplies that generate a large amount of heat, so that there is no high-density mounting board and it is economical to cool. Direct cooling is performed by taking in air and forcing convection. That is, processing power supply area (24)
Are configured as open areas. (25) is the operation box,
A door (26) is provided on the front side, a CRT and the like are stored inside, and it is spatially integrated with the control area (23) by a large opening. The door (26) is provided with a CRT escutcheon (27) and a seat key switch (28). For convenience of explanation, FIG. 2 shows both the NC control unit (6) composed of a high-density mounting board and the machining power supply unit (5) which is a heat-generating device with a large amount of heat dissipation. (5) is arranged in the processing power supply section region (24) existing with a wall in the direction orthogonal to the drawing.

Doors (29) and (30) are provided for the regions (23) and (24) on the right side of the housing (21) in the figure, and a side wall (31) is formed on the opposite side. . An intake window (32) equipped with a dust filter is provided below the door (30), and an exhaust louver (34) is attached to the ceiling surface (33) correspondingly.

On the other hand, on the left side wall (31) in the drawing of the control area (23), the second
Inside the opening (31a), the heat exchanger (3
5) is embedded and installed. (36) is a heat exchanger (3
It is the case of 5) and is formed in the shape of a box that is long in the vertical direction, and the outer spreading flange (36a) for mounting on the side wall (31).
As shown in FIG. 3, they are formed vertically and horizontally, and a packing (37) is attached to the inner surface of the outer spreading flange (36a). Heat transfer plate (38) in the center of the case (36)
The heat transfer plate (38) is formed by bending a thin plate into a corrugated shape to form a plurality of alternating internal air flow paths (39) and external air flow paths (40). As shown in FIG. 4, the upper end of the inside air flow path (39) is made airtight by the sealing member (40a), and similarly, the downstream side of the outside air flow path (40) is also airtightly closed. As shown in FIG. 2, an outside air fan (42) and an inside air fan (43) are provided above and below the heat transfer plate (38). In FIG. 4, (44) is a lid that covers the entire opening side of the case (36), and (45) is an L-shaped packing.

(48) is a screw member, as shown in FIG. 3, the lid (44), L
The cross section packing (45), the outer spreading flange (36a), and the packing (37) are threadedly engaged with the side wall (31) to integrally fix them. The heat exchanger (35) is fixed to the side wall (31) by tightening the screw member (48), and at the same time, the lid (44) and the case (36) and the case (36) and the side wall (31). The space between and is kept airtight.
As shown in Fig. 4, the enlarged part (5
0) is formed and the inclined duct (5
Together with 1), it forms a wind tunnel (52) leading to the space outside the panel. The outside air fan (42) is horizontally mounted on the upper surface of the mounting plate (53) and has an opening (50) formed inside the expanded portion (50).
From a), it is slidably mounted on rails (54) arranged on both sides of the inside. The lid (55) is welded at a right angle to the end of the mounting plate (53), and the opening (50a) of the expanded portion is closed at the final device position of the outside air fan (42) to ensure this closed state. Packing (56) to cover (55)
It is provided on the inner circumference of. At the final mounting position of the outside air fan (42), the rear end of the mounting plate (53) fits into the gap (58) between the rail (54) and the lateral member (57), and the lid (55) covers the case expansion part (50). ) Is fixed by screwing.

Further, as shown in FIG. 4, an outer spreading flange (51a) and an inner spreading flange (51b) are formed at the upper and lower ends of the inclined duct (51), and the flanges (51a), (51
Packings (59) and (60) are attached to the lower surface of b), and the inclined duct (51) is inserted from the ceiling opening (33a), and the ceiling surface (3
An airtight wind tunnel (52) is formed by screwing and fixing to 3). (61) is an exhaust louver provided on the upper part of the inclined duct (51), and has a plurality of horizontal rails (61a) having a Z-shaped cross section, and the horizontal rails (61a) are the inclination angles of the inclined duct (51). It is arranged diagonally according to.

Further, as shown in FIG. 2, the machining power supply control unit (5) and the NC control unit (6) are mounted on the right side of the heat exchanger (35) avoiding the outside air fan (42) and the inside air fan (43). It is arranged via a metal fitting (100). Also, the door (2
The servo amplifier (7) is mounted on the inner surface of 9) via a box-shaped mounting base (101). The heat sink portion (7a) of the servo amplifier (7) is embedded in the mounting base (101) while maintaining airtightness with the main body portion, and the cooling fan (7b) is provided in the central portion. The door (29) is provided with a wind window (29a) at the top and bottom of the mounting base (101) and at the position of the cooling fan (7b), and the heat sink (7a) is directly moved by the cooling fan (7b) as shown by the arrow E. It is cooled. Note that (8) and (9) are control transformers,
This is the I / O case.

5 is a sectional view taken along the line IV-IV in FIG. 1, and FIG. 6 is a perspective view of an essential part of FIG. 5, showing exhaust louvers provided above the machining power supply area (24) on the ceiling surface (33). This shows the details of (34). In both figures, (33b) is the ceiling surface (3
It is an exhaust port provided in the processing power source region (24) in 3). Viewed from the door (30) side, receiving frame members (62) and (63) are provided on the left and right of the exhaust port (33b), and horizontal frame members (64) and (65) are provided on the front and rear sides. The frame members (62), (63), (64) and (65) are welded in a rectangular shape. The receiving frame members (62), (63) have horizontal legs (62a), (63a), vertical legs (62b), (63b),
A plurality of inclined grooves (62c) and (63c) are formed at equal intervals on each of the vertical legs (62b) and (63b).
c) and (63c) are the protrusions (62d) and (63d), respectively.
And each vertical leg (62b), (63b) forms a zigzag top edge. The horizontal frame member (64) is the ceiling surface (33).
The horizontal leg (64a) that abuts against the vertical leg (62a) of the receiving frame member.
It is provided with an outer vertical leg (64b) circumscribing b) and (63b) and an inner vertical leg (64c) inscribed. In addition, the horizontal frame member (6
5) has a horizontal leg (65a) that contacts the ceiling surface (33), a vertical leg (65b) that circumscribes the receiving frame members (62) and (63), and a cover leg (65c) that covers from above. ing.

(66) is a plurality of substantially Z-shaped horizontal rails having a base plate portion (66a), an upper leg (66b), and a lower leg (66c), and both longitudinal ends thereof are receiving frame members (62), (63). Inclined groove (62c), (6
3c) is fitted inside, and the lower ends of the horizontal rail (66) are the base plate portion (66a), the upper leg (66b) and the lower side (66c), and the inclined grooves (62c) and (63c). The projections (62d) and (63d) are brought into contact with each other and are positioned in the front-rear direction and the downward direction. (67),
Reference numeral (68) denotes a presser frame member, which includes vertical legs (67a) and (68a) respectively abutting the longitudinal end faces of the horizontal rails (66) and the horizontal rails (6a).
It is formed in an L-shaped cross section having horizontal legs (67b) and (68b) that abut the ridge line of 6). Holding frame member (67),
End legs (67c) and (68c) are formed at both ends of the (68), and the horizontal frame member (6
It is fixed to 4) and (65). By this assembly, the horizontal rails (66) are positioned in the left-right direction and the upward direction, and are assembled as an exhaust louver (34). Each of the horizontal rails (66) of the exhaust louver (34) is arranged like an armored door so that its upper leg (66b) and lower leg (66c) form a predetermined exhaust gap between the upper and lower legs. Is arranged so as to face the side opposite to the machine tool, and is fixed to the ceiling surface (33) by a screw member (70). Further, the exhaust louver (61) on the side of the hermetically sealed area described above is also configured in the same manner as the exhaust louver (34) on the side of the upper open area.

The operation of the present invention configured as described above will be described below. First, when the heat exchanger (35) shown in FIG. 2 is operated, the air outside the control panel and the air inside the control panel alternate convection in the flow path of the heat transfer plate (38). At this time, the outside air of the control panel is supplied by the outside air fan (42) and the air inside the control panel is supplied by the inside air fan (43), respectively, to the outside air flow path (40) and the internal air flow of the heat exchanger (35) shown in FIG. It is sucked into the passage (39) and flows in the directions c and d. Therefore, heat is exchanged between the air outside the control panel and the air inside the control panel via the heat transfer plate (38), and the control area (23) and the operation area (22) inside the control board are indirectly cooled. To be done.

The side wall (31) side of the control panel (20) is provided with an outside air suction hole (44a) of the heat exchanger (35) as shown in FIG. It is sufficient if there is a gap of several tens of millimeters, and also the outside air flow path (40) of the heat exchanger.
Since the width of is large, it does not get clogged with dust and usually does not require maintenance. Therefore, the control panel (20) can be installed substantially in close contact with the machine tool (71), and the overall installation area can be greatly reduced.

Next, as shown in FIGS. 2 and 4, the warmed high-temperature air after the heat exchange is moved by the inclined duct (51) and the exhaust louver (61) in the direction opposite to the machine tool (71), that is, the machining. It is deflected away from the machine, tilted and exhausted upwards. Therefore, there is no fear that the adjacent machine tool (71) will be thermally adversely affected.

In addition, each unit and device in the control area (23) has a door (2
9) can be opened and approached for easy test adjustment and maintenance. The outside air fan (42) inside the heat exchanger (35)
Is attached to the inside of the control panel so that it can be pulled out freely, and the inside air fan (43) is also attached to the case (36).
Both can be replaced.

In the control area (23), the door (29) on the right side has a relatively short depth of equipment such as the servo amplifier (7), and the central part has the main equipment such as the NC control unit (6). Since the heat exchangers (35) are arranged on the (31) and can be mounted in high density with three layers in depth as viewed from the maintenance / inspection side (right side), the control panel (20) can be downsized. It is possible. Further, since the heat exchanger (35) can be arranged by utilizing the entire side wall (31), the heat transfer plate can be enlarged and the cooling capacity can be increased.

The servo amplifier (7) is usually required for 3 to 5 axes, but it is mounted only on the door (29) by arranging it side by side and arranging it vertically as necessary. It is possible to generate heat from the heat sink (7a) through the door (29)
Since it can radiate heat directly to the outside, it helps reduce the temperature rise inside the control panel. In addition, because the opening space for opening the door (29) is secured on the right side of the control panel (20), the heat sink (7a)
Exhaust heat from the machine tool does not adversely affect the adjacent machine tool (71).

Next, the operation of the present invention by the exhaust louver (34) will be described as follows. The hot air from the processing power supply area (24) in the control panel pushed up by the cooling fan is
As shown by the arrow in Fig. 5, the flow enters the exhaust gap between the horizontal rails (66) in a divergent manner, and is deflected by the board portion (66a) and the upper leg (66b) and moves away from the machine tool (71). The gas is exhausted obliquely upward. Therefore, even if the exhausted high temperature air diffuses, it does not reach the machine tool (71) in the vicinity,
There is no risk of adverse thermal effects. Therefore, since the control panel (20) and the machine tool (71) can be installed in close contact with each other, the installation floor area can be reduced.

The upper leg (66b) and the lower leg (66c) of the adjacent horizontal rail (66) are vertically overlapped with each other, and they function as an eaves and a gutter, respectively. (66c) catches a large amount of water droplets and lower leg (6
It is discharged from both ends of 6c) to the outside of the receiving frame members (62) and (63).

Also, on the front side of the exhaust louver (34), the inner vertical leg (64c)
Plays the role of the lower leg (66c) and the cover leg (65c) on the rear side.
Plays the role of upper leg (66b).

Multiple cross rails (66) of the exhaust louver (34) as described above
Are inclined grooves (62c), (63) of the receiving frame members (62), (63).
c) Fitted in the pair of holding frame members (67), (68)
It can be easily assembled because it is fixed only by screwing. Moreover, since the exhaust port (33b) of the ceiling surface (33) is formed by one square hole, processing distortion does not occur and the productivity of the housing can be improved.

In the above embodiments, examples of the height of the exhaust louver, the inclination angle of the cross rail, the opening area, etc. according to the present invention have been shown, but the present invention is not limited to this and can be selected in a wide range. .

[Advantages of the Invention] As described above, according to the present invention, the outside air and the inside air are alternated through the heat transfer plate in the air passage defined by the heat transfer plate into the outside air passage and the inside air passage. A heat exchanger that indirectly air-cools the sealed area inside the housing by forced convection to the outside, with the opening formed in the side wall that is the machine tool side of the housing with the air passage wall surface on the outside air flow path side closed. In addition, the wind tunnel connected to the exhaust opening formed on the ceiling surface of the housing is installed continuously in the outside air flow path while being installed so as to project into the closed area, and the outside air is Since the forced convection fan of is arranged, the mounting board and the like in the sealed area can be directly cooled by the internal air forcedly circulated in the sealed area, and at the same time, the internal air flow path inside the internal air flow path can be cooled through the heat transfer plate. The air in the outside air flow path that has exchanged heat with air does not stay in the housing The air can be exhausted through the exhaust opening on the ceiling surface. Therefore, the air passage wall surface on the outside air flow passage side is not heated by the high-temperature air after heat exchange, does not have a bad thermal effect on the machine tool, and the control panel can be placed closer to the machine tool accordingly. As in the past, ease of maintenance and inspection of the storage device can be ensured.

Further, according to the present invention, an exhaust gap formed by a plurality of horizontal cross-sections having a substantially Z-shaped cross section is provided to the machine tool at the exhaust opening portion of the housing ceiling surface serving as an exhaust port of the outside air flow path. Since a louvered exhaust louver facing diagonally in the opposite direction is provided, the hot air exhausted above the sealed area can be efficiently guided away from the machine tool, reducing pressure loss at the ceiling exhaust port, Moreover, even if the exhausted high-temperature air diffuses, it is possible to eliminate a thermal adverse effect on the nearby machine tool. Further, in the armored exhaust louver formed by a plurality of cross-shaped cross-sections of the Z-shaped cross-section, the upper and lower sides of the cross-shaped cross-section of the Z-shaped cross-section are vertically overlapped with each other, which may cause the eaves and the gutter respectively. Since it plays a role, it is possible to prevent water droplets, dust, etc. falling at a normal inclination angle from entering the outside air flow path of the heat exchanger.

Further, according to the present invention, a door is provided on the opposite side of one side wall in the hermetically sealed area of the housing, and the heat generating device is attached to the inner surface of the door by hermetically sealing the heat sink portion to a box-shaped mounting base. Since the wind windows are drilled at multiple locations on the mounting base in the above, and a cooling fan for directly air-cooling the heat sink is provided at the location facing one of the wind windows inside the mounting base, the main body of the heat generating device is mounted. It can be housed in a closed area together with the substrate and the like, and can be cooled by both the inside air forcedly circulated inside the closed area and the outside air introduced into the mounting table by a cooling fan.

Further, according to the present invention, in the housing, an open area is provided adjacent to the sealed area to accommodate a heat-generating device with a large amount of heat dissipation,
An intake port equipped with a dust filter is provided in the lower part of the open area, and an exhaust port is provided in the ceiling, and an exhaust gap formed by a plurality of horizontal cross-sections with a substantially Z-shaped cross section is provided on the machine tool at the exhaust port. On the other hand, since an armored door-shaped exhaust louver facing diagonally in the opposite direction is provided, heat-generating equipment with a large amount of heat dissipated can be directly cooled by the introduced outside air, which can prevent the heating of the wall surface of the housing and is exhausted above the open area. The high-temperature air can be efficiently guided away from the machine tool, and the control panel can be placed closer to the machine tool accordingly. In addition, the door louver exhaust louver can prevent water droplets, dust, etc. falling at a normal inclination angle from entering the open area.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of the present invention, and FIG. 2 is a line I- in FIG.
I sectional view, FIG. 3 is a sectional view taken along the line II-II of FIG. 2, FIG. 4 is an enlarged sectional view of an essential part of FIG. 2, and FIG. 5 is a sectional view taken along line IV-IV of FIG.
FIG. 6 is a cross-sectional view, FIG. 6 is an exploded perspective view of an essential part of FIG. 5, and FIG. 7 is a vertical cross-sectional view showing an example of a conventional control panel of a machine tool. In the figure, (5) is a processing power supply unit (heating device with a large amount of heat dissipation), (6) is an NC control unit, (7) is a servo amplifier (heating device), (7a) is a heat sink part, (2
(0) is a control panel, (21) is a housing, (22) is an operation part area (closed area), (23) is a control area (closed area), (24) is a machining power supply area (open area), (29) is a door, (29a) is a wind window, (7b) is a cooling fan, (31) is a side wall, (31a)
Is an opening, (32) is an intake window (intake with a dust filter), (33) is a ceiling surface, (33a) is an opening (exhaust opening), (33b) is an exhaust opening, and (34) is Exhaust louvers, (35)
Is a heat exchanger, (36) is a case (air passage), (38) is a heat transfer plate, (39) is an inside air passage, (40) is an outside air passage, and (42) is an outside air fan (forced convection fan). ), (44) is a lid (air passage wall surface on the outside air flow path side), (44a) is an outside air suction hole, (52) is a wind tunnel, (61) is an exhaust louver, (61a) is a horizontal crosspiece, and (66) is a horizontal side. A cross, (71) is a machine tool, and (101) is a mounting base. In the figure, the same reference numerals denote the same parts.

Claims (4)

[Claims] 1. A side wall has a dust-tightly sealed area for housing a control unit composed of a mounting board in a housing provided near the machine tool with a space for intake. The closed area is indirectly provided by a heat exchanger for alternately forcing the inside of the air passage defined by the heat transfer plate into the outside air passage and the inside air passage and the outside air and the inside air through the heat transfer plate. A control panel of a machine tool to be air-cooled, wherein the heat exchanger has an air passage wall surface on an outside air flow passage side inside the closed area in a state in which an opening formed in one side wall of the housing is closed. And a wind tunnel connected to an exhaust opening formed on the ceiling surface of the casing is continuously provided in the outside air flow path, and forced convection of outside air is provided in the wind tunnel. Control panel for machine tools, which is equipped with a fan. 2. An exhaust opening formed on a ceiling surface in a hermetically sealed area of a housing is provided with an exhaust gap formed by a plurality of horizontal cross-pieces having a substantially Z-shaped cross section in a diagonally opposite direction to a machine tool. The control panel for a machine tool according to claim 1, further comprising an armored door-shaped exhaust louver. 3. A door is provided on the opposite side of one side wall in a hermetically sealed area of the housing, and a heat generating device is hermetically attached to a box-shaped mounting base of the heat generating device on the inner surface of the door. Wind windows are bored at a plurality of locations on the mounting base of the door, and one of the wind windows in the mounting base is provided.
3. A control panel for a machine tool according to claim 1, wherein a cooling fan for directly air-cooling the heat sink portion is provided at a portion facing each other. 4. An open area is provided in the housing, adjacent to the closed area, for accommodating a heat-generating device with a large amount of heat to be dissipated. An intake port provided with a dust filter is provided below the open area, and a ceiling portion is provided. Is provided with an exhaust port, and the exhaust port is provided with an armored door-shaped exhaust louver in which an exhaust gap formed by a plurality of horizontal bars having a substantially Z-shaped cross section is diagonally opposite to the machine tool. A machine tool control panel according to any one of claims 1 to 3.