JPH07100732A - Control board - Google Patents

Abstract

PURPOSE:To provide a miniaturized control board capable of indirect cooling by heat exchange action of a heat transmission plate and a working power source having large heat generation and reducing a dead space around the heat transmission plate while constituting an economical control board having a large cooling capacity. CONSTITUTION:Heat transmission plates 12, 13 for the heat exchange are disposed in almost the whole vent division formed on the whole rear surface of a control board 101. An air suction chamber is formed in front of the heat transmission plate. Working power source device units 52-56 are formed as a whole with a vent duct connected to the air suction chamber. An open air fan 61 is connected to the upper surface of the vent division and provided in an exhaust duct 10 located on the upper surface of a top plate 4. Inner air fans 62, 63 are located respectively in dust proof divisions 111 located in the lower ends of the heat transmission plates 12, 13. The heat transmission plate 13 is formed short and a heat sink part of a servo motor drive device 59 located below the heat transmission plate is adapted to project into the vent division.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control panel of a machine tool such as an electric discharge machine or a laser machine, and more specifically, the control panel is hermetically sealed in a dustproof manner, and the inside of the dustproof compartment is indirectly cooled. The present invention relates to a control panel of a machine tool including a heat exchanger for operating the machine.

[0002]

2. Description of the Related Art A control panel for a machine tool such as an electric discharge machine or a laser beam machine is generally provided with an operation section equipped with a CRT, a sheet key, etc., and a control section accommodating a numerical control device, a servo motor drive device, etc. , A pulsed power supply device, a DC power supply, etc. Although each of the above parts may be composed of a control panel housed in an integral housing, in order to improve operability, it is often the case that only the operation part is individually arranged on the front part of the machine tool.

Conventionally, the operation section and the control section are hermetically sealed in a dustproof manner, and the hermetically sealed area is indirectly cooled by using a heat exchanger. However, the machining power source section has no high-density mounting board,
Because of the large amount of heat generated, the cost required for cooling increases, and for economic reasons, the cooling fan has taken in the outside air of the control panel to perform forced cooling. As an example of such a conventional control panel, JP-A-3-983
There was 740.

[0004]

A dustproof filter is provided at the outside air intake port of the machining power source section of the control panel, but intrusion of dust and oil mist is unavoidable, which is not preferable in terms of reliability. It was Further, the dustproof filter needs to be regularly cleaned, which is not preferable in terms of maintenance. In addition, the heat exchanger provided in the control unit,
This is a box-shaped case that houses a corrugated heat transfer plate, and an outside air fan and an inside air fan above and below it. It is embedded in the left side wall of the control panel housing and the main electrical equipment inside the panel, such as the control unit, is as described above. It is arranged on the front side of the heat exchanger via a mounting bracket. Therefore, there are many spaces (dead spaces) that are not effectively used around the heat exchanger, leaving room for downsizing the control panel. further,
Since the inside air intake port of the heat exchanger is located below the outside air fan, the top panel device is arranged on the front side of the outside air fan, and the intake air flow to the inside air intake port is not good, As a result, the cooling capacity of the heat exchanger was reduced.

The present invention has been made in order to solve the above-mentioned problems. Indirect air cooling can be performed by the heat exchange action of the heat transfer plate, including the processing power source section that generates a large amount of heat, and the heat transfer described above can be performed. It is an object of the present invention to reduce the dead space around the plate, economically construct a heat transfer plate having a large cooling capacity, and obtain a miniaturized control panel.

[0006]

According to a first aspect of the present invention, there is provided a control panel having a housing including a front door and a back plate for a rear surface, and a partition wall for partitioning the front surface and the rear surface of the housing into each other. A dust-proof compartment for housing the control device is provided on the front surface of the housing, and a ventilation compartment for housing the heat transfer plate of the heat exchanger is provided on the back surface of the housing, and the upper and lower ends are sealed in almost all of the ventilation compartment. The heat transfer plate bent in a corrugated shape, which is composed of a vertical inner air side rectangular flow path and an outer air side rectangular flow path whose upper and lower ends are opened, is hung vertically, and the inside air side rectangular flow path is provided above the partition wall. An opening is provided in the outside air side rectangular flow path in the lower part of the back plate which is the outer wall of the ventilation compartment, and an inside air fan attached to the ventilation hole and the opening are provided. It is equipped with an external air fan that adheres, and operates the internal air fan and the external air fan. Serial and is characterized in that the heat exchange by the inside air-side rectangular channel and the heat transfer plate made of the outside air rectangular channel.

A control panel according to a second aspect of the present invention includes a partition wall for partitioning a front surface and a rear surface of the housing, a heat exchanger including at least two upper heat transfer plates and lower heat transfer plates, and the partition wall having the above-mentioned structure. A first vent hole formed in the lower portion of the inside air side flow path of the upper heat transfer plate and a second ventilation hole formed in the upper portion of the inside air side flow path of the lower heat transfer plate are provided, and the first vent hole is provided. And an internal air fan attached to the second ventilation port, wherein the exhaust air from the first ventilation port is pushed into the second ventilation port by the internal air fan to blow air.

A control panel according to a third aspect of the present invention includes a partition wall for partitioning a front surface and a rear surface of the housing, a heat exchanger including at least two upper heat transfer plates and lower heat transfer plates, and the partition wall having the above A first vent hole formed in the lower part of the inside air side flow path of the upper heat transfer plate and a second vent hole formed in the upper part of the inside air side flow path of the lower heat transfer plate.
A ventilation port, a ventilation port coupling member comprising one of a duct and a fan mount for coupling the first ventilation port and the second ventilation port to each other, and an inside air fan attached to the ventilation port coupling member. The inside air is forcedly convected in the inside air side rectangular channel by the inside air fan.

According to a fourth aspect of the present invention, a control panel is formed in a corrugated shape having a vertical inside air side rectangular flow passage having a sealed upper end and an outside air side rectangular flow passage having an open lower end in almost the entire ventilation compartment. The bent heat transfer plate is vertically provided, a first vent hole is provided in an upper part of the partition wall to be bored in the inside air side rectangular flow path, and a lower part of the partition wall is in the vicinity of the inside air side rectangular flow path port. A second vent hole is provided in the bottom of the back plate which is the outer wall of the ventilation section and a back part of the top plate, and an opening is provided in the outside air side rectangular flow path, and the second vent port is attached to the vent hole. An inside air fan and an outside air fan attached to the opening are provided, and the inside air fan and the outside air fan are operated to perform heat exchange by a heat transfer plate including the inside air side rectangular flow path and the outside air rectangular flow path. It is what

According to a fifth aspect of the present invention, there is provided a control panel having a housing including a front door and a back plate for a rear surface, wherein a partition wall separating the front surface and the rear surface of the housing and a semiconductor on the front surface of the housing. A dustproof compartment for accommodating a device including an electric power component is provided, a heat sink portion fixed to the semiconductor electric power component, and an angular opening for penetrating the heat sink portion in the outside air side rectangular flow path are provided on the partition wall. Fix the above device to the partition wall,
It is characterized in that the heat sink portion is provided so as to penetrate the angular opening so that the heat sink portion projects into the outside air-side rectangular flow path.

According to a sixth aspect of the present invention, there is provided a control panel having a housing including a front door, a back plate for a rear surface, a ceiling plate, and a side plate, and a partition wall for partitioning a front surface and a back surface of the housing, and the partition wall. Is provided with an intake port that is bored at the top of the inside air-side rectangular channel,
A unit case accommodating a unit including an electronic component is fixed below the intake port, and a ventilation duct whose upper and lower surfaces are opened from a front plate of the unit case and a side plate of the housing is provided, It is characterized by comprising a closing member for sealing between the upper end and the ceiling plate.

According to a seventh aspect of the present invention, there is provided a control panel, which includes a partition wall for partitioning a front surface and a rear surface of a housing, a unit including electronic components, and a rectangular duct-shaped unit case for housing the unit.
The partition wall is provided with a first vent hole formed in an upper portion of the inside air side rectangular flow path and a second ventilation hole formed in a lower portion of the inside air side rectangular flow path, and the unit case is provided in the first ventilation hole. And an internal air fan attached to the second vent,
The inside air is forced to flow in the unit case by the inside air fan.

According to another aspect of the present invention, there is provided a partition wall for partitioning a front surface and a rear surface of a casing, and a dustproof compartment for accommodating a plurality of machining power supply units on the front side of the casing, below the machining power supply unit. A numerical controller fixed to the cable, a cable connected to the numerical controller, a cable processing unit connecting the cable below the numerical controller, and a horizontal shape fixing in the back direction of the cable processing unit. It is characterized by comprising a fan mount and an inside air fan attached to the fan mount.

According to a ninth aspect of the present invention, in a control panel having a housing made of a front door and a back plate for a rear surface, a partition wall for partitioning the front surface and the rear surface of the housing and a dustproof member which is a rear surface of the housing. A power supply device fixed to the bottom surface of the compartment, a horizontal shelf plate fixed to the upper surface of the power supply device, and a ventilation hole formed in the partition wall at a lower part of the shelf plate to form a rectangular passage on the inside air side. The upper part of the shelf plate is provided with a cable connected to the numerical control device.

A control panel according to a tenth aspect of the present invention is a control panel having a housing composed of a front door, a back plate for the back surface, a ceiling plate, and a side plate, and a partition wall for partitioning the front surface and the back surface of the housing, and the housing. An attachment box having a ventilation compartment for accommodating a heat transfer plate of a heat exchanger on the back of the body, a cutout portion penetrating the ventilation division part in the ceiling plate, and a heating element fixed to the upper surface of the ceiling plate. And an exhaust duct whose front side is opened, and the exhaust duct is fixed to the upper surface of the ceiling plate by surrounding the cutout portion and the exhaust flow generated by the heat exchanger is passed through the exhaust duct to the heating element. It is characterized by being air-cooled.

According to another aspect of the present invention, there is provided a control board comprising: a printed circuit board having a semiconductor power component fixed to a heat sink; a metal supporting plate which is a part of the vertically arranged printed circuit board; The heat sink is fixed to the unit case surrounding the printed circuit board and the metal supporting plate.

[0017]

The control panel according to the present invention is a large-sized heat exchanger with a small dead space due to the inside air side and outside air side rectangular flow passages formed in almost the entire width of the ventilation section formed on the entire rear surface side of the housing dustproof section. Is configured. The intake port and the exhaust port of the rectangular passage on the inside air side, which are formed in the partition wall between the dust-proof compartment and the ventilation compartment, are located at positions avoiding the equipment inside the panel so that the resistance to the air flow in the dust-proof compartment is reduced. Can be installed in
The wind velocity of forced convection in the panel can be increased, and the temperature distribution in the panel can be made uniform.

Further, by forming the inside air side rectangular flow passage whose upper and lower ends are sealed by dividing it into upper and lower halves, a heat exchanger having a height substantially equal to the height of the housing is formed by using a short heat transfer plate which is easy to manufacture. It is economically constructed, and by providing the inside air fans for the upper and lower two stages of the inside air side rectangular passages individually or in common, it is possible to cope with the arrangement of electric equipment in the panel and select the cooling capacity.

Further, by sealing the lower end of the outside air side rectangular flow path, an inside air side space can be formed below the ventilation section,
The inside air fan can be disposed in the space to prevent the fan from protruding into the dustproof compartment, and the electric equipment space in the dustproof compartment can be increased. Further, the distance from the lower end of the heat transfer plate to the inside air fan can be arbitrarily selected.

Further, by making the heat sink portion of the electric device project into the ventilation compartment, the amount of heat generated in the dustproof compartment can be reduced, and the temperature rise of the heat sink portion can be reduced by the forced cooling by the outside air fan.

Further, by providing an intake chamber communicating with the intake port of the rectangular passage on the inside air side in the upper part of the unit case forming the vertical ventilation duct, air flow loss is prevented and the unit is opened even when the door is opened. Dispersion of the cooling air flow inside is prevented.

Further, the air flow is made to flow through the electronic equipment unit which is closely arranged to the intake port or the exhaust port of the inside air side rectangular flow path, so that the electronic equipment unit in which the high density mounting or the board and the fins are horizontally arranged is locally formed. Can be forced air cooled.

Further, by disposing the processing power supply unit group which generates a large amount of heat at the uppermost part of the dust-proof compartment, the high temperature exhaust gas flow from the processing power supply unit group does not have a thermal adverse effect on the numerical control device or the like, and the above numerical values are obtained. By arranging the inside air fan inside the lower cable processing space of the control device, the air resistance can be reduced and the space inside the dustproof section can be effectively used.

Further, by drawing and laying a cable on the upper surface of the shelf-like plate, electromagnetic waves from the electric equipment arranged at the lower part of the shelf-like board are shielded, and the cable comes close to the electric equipment. You can wire. The shelf-like plate prevents short-circuit circulation of the intake / exhaust ports of the inside air side rectangular flow path.

Further, since the exhaust flow of the outside air fan flows along the outer surface of the ceiling of the housing, the heat radiation of the outer surface of the ceiling is promoted, and the heating element arranged on the outer surface of the ceiling is also forcibly cooled at the same time.

Further, by screwing the heat sink to which the semiconductor power component is screwed and fixed to the metal supporting plate fixed to the side surface of the unit case, breakage of the terminal of the semiconductor power component due to vibration is prevented, and the metal supporting plate is prevented. The heat transfer promotes heat dissipation and shields electromagnetic waves from semiconductor power components.

[0027]

【Example】

Example 1. Embodiment 1 of the present invention will be described below with reference to FIGS. In the figure, 101 is a control panel,
Reference numeral 1 denotes a housing, which has a left side wall 2, a right side wall 3, a top plate 4, a bottom plate 5, and a partition wall 6. Left and right doors 7 and 8 having a double door are provided in the front opening of the housing 1, and a dustproof compartment 111 having a large depth is formed between the door and the partition wall 6. Reference numeral 9 is a back plate screwed to the back surface of the housing 1, and has a ventilation opening 9 at the bottom.
A is drilled. A ventilation compartment 112 having a narrow depth is formed between the back plate 9 and the partition wall 6. In Figure 3,
The left and right side surfaces of the ventilation section 112 are formed by the left and right side walls 2 and 3, but the left and right ends of the back plate 9 may be bent in a box shape. Reference numeral 10 denotes an exhaust duct provided behind the outer surface of the ceiling of the housing 1. The ventilation space 1 is located behind the top plate 4.
The depth 12 is cut out, and the upper surface of the ventilation section 112 and the space inside the exhaust duct 10 are continuous. The exhaust duct 10 includes a rear wall 10A, an upper wall 10B, and left and right side walls 1.
0C, the rear wall 10A is screwed to the back plate 9, the left and right side walls 10C are connected to the upper ends of the left and right side walls 2 and 3, and the front side is open. Reference numeral 11 denotes a fan mounting plate disposed between the exhaust duct upper surface wall 10B and the top plate 4, and has a plurality of inlets 11A for the outside air fan 61. A deflection plate 11B extending obliquely to the exhaust duct rear wall 10A is formed from the upper end of the fan mounting plate 11, and mounting legs 11C that are in close contact with the top plate 4 are formed from the lower end.

Reference numeral 12 is a heat transfer plate disposed in the upper part of the ventilation section 112. A thin plate is bent into a corrugated shape, and a large number of partition walls 12A are formed at equal intervals, and both ends in the longitudinal direction thereof are alternately arranged. Every other one is connected by the bridging portion 12B. Further, flanges 12C are formed on both side ends and are secretly attached to the partition wall 6. As shown in FIG. 5, seal fittings 15 also serving as mounting flanges are disposed at the upper and lower ends in the groove of the heat transfer plate 12 whose front side is open in FIGS. It has been stopped. As a result, a large number of inside air side rectangular flow paths 90 are formed between the heat transfer plate 12 and the partition wall 6, and the inside air side rectangular flow paths 9 are formed.
The outside air side rectangular flow passages 91 whose upper and lower ends are opened are formed between the back plate 9 and the zeros alternately. Reference numeral 13 is a heat transfer plate adjacent to the heat transfer plate 12 and having a short length. Similarly, an inside air side rectangular flow path 90 and an outside air side rectangular flow path 91 are formed.
Thus, the inside air side rectangular flow path 90 and the outside air side rectangular flow path 9 are formed.
1 is formed by the heat transfer plates 12 and 13 over substantially the entire width in the ventilation section 112.

An intake port 6A is formed at the uppermost portion of the partition wall 6 and communicates with the uppermost portion of the inside air side rectangular flow passage 90 of the heat transfer plates 12 and 13, and the inside air side rectangular passageway of the heat transfer plate 12 is provided at the lower portion. An exhaust port 6B communicating with the lowermost part of 90 is provided, and the heat transfer plate 1 is provided at the right middle.
An exhaust port 6C communicating with the lowermost portion of the inside air side rectangular flow path 90 of No. 3 is provided. The exhaust port 6B is provided with an inside air fan 62 via a fan mount 17 having an inflow port 17A, and the exhaust port 6C is provided with an inside air fan 63 via a similar fan mount 18. .

Above the dust-proof compartment 111 (below the inlet 6A), the pulse power supply units 52, 53 are arranged side by side.
54, 55, 56 are provided. The above-mentioned unit constitutes a machining power supply unit group for electric discharge machining, for example, and generally includes a unit having the largest heat generation amount in the control panel 101. Unit group 52 to 5
A numerical control device 51 and control units 57 and 58 mainly provided with a board for machine input / output control are disposed below the device 6. Further, a servo motor driving device 59 and a stabilized DC power supply 60 are provided below it. Inside air fan 6
2 is arranged so as to be seen through between the numerical control device 51 and the stabilized DC power supply 60, and the inside air fan 63 is disposed in the control unit 5
It is located on the back of 7,58.

The unit groups 52 to 56 are the closing members 19
It is inserted between the upper guide rail 21 for each unit supported by the rear lateral member 20 and the lower guide rail 22 for each unit supported by the front lateral member 23 and the partition wall 6. The unit 41 shown in FIG.
It is a unit case of 3, 54. In this case 41, a front wall 41A and a rear wall 41C are connected by a central wall 41B and a pair of unit rails 42, 42 arranged above and below the central wall 41B. 43 is a unit case of the units 55 and 56. The case 43 includes a front wall 43A, a side wall 43B, a rear wall 43C which are integrally formed, and unit rails 42, 42 which are arranged above and below the wall 43C. The control unit 57 also has a unit case 43 and is inserted between the guide rails 21 and 22. The configurations and operations of the guide rails 21 and 22 and the cases 41 and 43 are the same as those shown in FIGS. 5 to 8 of JP-A-5-82991. Further, the control unit 58 is inserted into the pair of left and right guide rails 24, and its configuration and operation are the same as those shown in FIGS. 1 to 4 or 9 to 13 of the above-mentioned JP-A-5-82991. . Therefore, details of mounting the unit and the like are publicly known and will not be described here.

The board and electronic parts of each unit are mainly attached to the case center wall 41B or the case side wall 43B, but they are omitted in FIG. A printed circuit board 66 is attached to the unit 55 in FIG.
A power transistor 67 is soldered to the substrate 66, and is screwed to the radiation fin 68. 69 is a right-angle type board connector. The front wall 43A of the case has an opening 4 corresponding to the board connector 69.
3A1 is bored, the connector 70 of the cable 71 is inserted, and the opening 43A1 is almost closed.

The upper and lower surfaces of the cases 41 and 43 of the processing power supply unit groups 52 to 56 are open, and the front walls 41A and 43A of the respective cases are in close contact with each other.
The portion surrounded by the left and right housing side walls 2 and 3 and the partition wall 6 forms a ventilation duct 113 having a substantially large rectangular cross section. By disposing the auxiliary blocking member 25 on the left and right side walls 2 and 3, and by closing the cable drawing opening (for example, 43A1) from the front wall of the case with the cable connector as described above, the ventilation duct 113 is more reliable. It can be anything. Top plate 4 and front walls 41A and 43 of each case
The space between A and A is completely closed by a closing member 19, and an intake chamber 114 continuous with the ventilation duct 113 is formed on the upper surface of the processing power supply unit groups 52 to 56. Reference numeral 26 is a guide vane for changing the direction of the air flow, which is arranged over the entire width of the intake chamber 114.

A plurality of power resistors 64 are mounted side by side on the front of the outer surface of the top plate 4 via a mounting plate 27. Since the resistance wire of the resistor 64 is insulated by cement filling and does not have a charging exposed portion and is excellent in environment resistance, it is not necessary to store it in the dustproof compartment 111. It is arranged on the outer surface of the ceiling 4 in order to reduce the amount of heat generation. Lead wire 6 of resistor 64
The terminal 4A is provided with a connector plug 65A, and is connected to the inside of the dustproof section 111 via a connector socket 65B that is attached to penetrate the top plate 4. Reference numeral 28 is a cover that covers the resistor 64 and the connector 65A, and vent holes 28A and 28B are formed in the front and rear of the cover.

The servo motor driving device 59 has an electric component portion 59 on which a substrate, power semiconductor components, etc. are mounted in the depth direction.
The heat sink portion 59B is divided into A and the heat sink portion 59B, and the heat sink portion 59B is formed so as to project from the mounting surface of the device 59, and this portion is embedded in a square hole 6D formed in the partition wall 6. Therefore, the heat sink portion 59B is exposed in the ventilation section 112 and radiates heat into the same section 112. This configuration can be similarly implemented in other devices such as a pulse power supply device having a large heat sink.

Next, the operation of the cooling structure of the control panel 101 will be described. Before the control board 101 is started for processing, all the outside air fans 61 and the inside air fans 62 and 63 are
Is driven. The warmed air in the dustproof compartment 111 is sucked in through the intake port 6A as indicated by the arrow a, and the heat transfer plate 1
Forced convection circulation is performed in which the inside air side rectangular flow passages 2 and 13 are diverted and the inside air fans 62 and 63 return the dust to the dustproof compartment 111 again. On the other hand, the low-temperature air outside the panel is sucked in through the ventilation opening 9A at the lower part of the back plate as shown by the arrow b, is diverted in the outside air side rectangular flow passage 91 of the heat transfer plates 12 and 13, and is outside the panel by the outside air fan 61. Is released. A part of the intake air flow from the ventilation opening 9A flows through the heat sink portion 59B of the servo motor drive device 59 and is then sucked into the outside air side rectangular flow passage 91 of the heat transfer plate 13. Forced convection in the inside air-side and outside air-side rectangular flow passages 90, 91 causes heat exchange through the heat transfer plates 12, 13 to cool the air in the dust-proof compartment 111 and generate heat in electric and electronic devices. Can be robbed. As described above, the heat transfer plates 12 and 13 are combined with the outside air and inside air fans 61, 62 and 63 to act as heat exchangers.

Continuing from the above basic operation description, the operation and effect of this embodiment will be described in detail. First, since the ventilation section 112 is formed on the entire back surface of the control panel 101 and the heat transfer plates 12 and 13 for heat exchange are arranged in the section 112, the heat transfer plates 12 and 13 are There is no dead space in the periphery (particularly in the left-right direction), and a heat exchanger having a large surface area (and thus essentially a large cooling capacity) can be configured by utilizing almost the entire space in the same section 112. In addition, the partition wall 6 of the housing 1,
Since the back plate 9 and the like also serve as the case of the conventional heat exchanger, it can be economically constructed despite its large cooling capacity. This also helps improve the rigidity of the housing 1. That is,
In the case where the heat exchanger is embedded in the wall surface of the housing as in the conventional example, the larger the heat exchanger is, the larger the wall surface of the housing is cut, and the reinforcement cannot be provided. This will reduce the rigidity. According to this embodiment, the partition wall 6 reinforced by the lateral members 20 and the like
Thereby, the rigidity of the housing 1 is improved. In addition, ventilation section 1
By increasing the depth dimension of 12 and using the heat transfer plates 12 and 13 in which the height of the partition wall portion 12A or 13A is large,
The cooling capacity can be further increased. This can be achieved only by replacing the back plate 9 and the heat transfer plates 12 and 13, and the dustproof section 1
It should be noted that it has no effect on the configuration within 11, and the present invention has a high degree of freedom in the design and fabrication of the cooling configuration. Further, as in the case of Japanese Patent Application Laid-Open No. 3-98740, the back side of the control panel 101 can be installed close to the machine tool, and the machine tool is not adversely affected by heat.

Next, the intake port 6A to the inside air side rectangular channel 90
Is provided directly below the top plate 4, and no in-panel device such as a unit is arranged in front of the top plate 4, so that the air passage resistance of the intake air flow is reduced and the cooling efficiency is improved. Further, by providing the guide vane 26 in front of the intake port 6A, the resistance due to the direction change of the air flow can be reduced. In addition, the uppermost air in the dustproof compartment 111, which generally has the highest temperature, is smoothly sucked in, the temperature difference with the outside air in the outside air-side rectangular flow passage 91 is large, and the amount of heat radiation increases. Further, since the intake port 6A is provided in the entire width of the dustproof section 111,
The air in the compartment 111 rises uniformly and is sucked in, so that stagnation of air and generation of hot spots are prevented.

Further, the unit case 41 of the processing power supply unit groups 52 to 56 arranged below the intake port 6A,
43 forms an up-down ventilation duct 113, and an intake chamber 114 communicating with the intake port 6A is provided on the upper part thereof, so that the air flow created by the inside air fans 62, 63 is the same as the doors 7, 8.
And the unit cases 41 and 43 are not diffused and are sucked into the units 52 to 56. As a result, the wind speed in the units 52 to 56 increases, and the substrate 6
The radiating fins 68 of 6 and the like are satisfactorily cooled. Further, with this configuration, the air flow in the units 52 to 56 is maintained even when the doors 7 and 8 are opened for testing, inspection and the like. In the processing power supply unit groups 52 to 56, electronic elements that generate a large amount of heat and cannot be energized by natural cooling are often used, but in this case as well, thermal destruction due to energization with the doors 7 and 8 open is prevented. It can be prevented.

In the above embodiment, the ventilation duct 113 and the intake chamber 114 are formed over the entire width of the dustproof section 111. However, the ventilation duct is formed only by the case portion of the unit that generates a large amount of heat, and the upper end of the unit case is A partial intake chamber may be formed by a closing member extending to the inner surface of the top plate 4.

Further, the processing power supply unit group 5 which generates a large amount of heat
Since 2 to 56 are arranged above the dustproof section 111,
The high-temperature exhaust gas flow from the processing power supply unit groups 52 to 56 is sucked into the inside air side rectangular flow passage 90 through the intake chamber 114 in which no electric device is arranged. Therefore, the high temperature exhaust gas flow does not diffuse into the dustproof section 111, so that the numerical controller 51 and the like are not adversely affected by heat. In addition, the lower cable processing space of the numerical control device 51 (DC stabilized power supply 60
The inside air fan 62 is disposed at the back of the upper part of the table. Since only the cable (not shown) having a small air resistance is located in front of the inside air fan 62, the air resistance can be reduced and the space inside the dustproof section 111 is effectively used.

A part of the exhaust flow b of the outside air fan 61 flows through the inside of the cover 28. Due to this exhaust flow, the resistor 64 arranged on the outer surface of the ceiling is forcedly cooled. This allows
A cooling fan for the resistor 64 can be omitted. Further, the cover 28 and the resistor mounting plate 27 serve as a duct,
A part of the exhaust flow flows along the outer surface of the top plate 4 of the housing. Since this exhaust flow is after heat exchange, it is about 4 De
The temperature rises around g, but the top plate 4 due to the high wind speed
The heat transfer coefficient on the outer surface is increased, and overall heat dissipation can be promoted compared to natural convection.

Further, since the heat sink 59B of the servo motor driving device 59 is projected into the ventilation compartment 112, the amount of heat generated in the dustproof compartment 111 can be reduced, and the air is sucked by the outside air fan 61 to force air cooling. The temperature rise of the heat sink 59B can be reduced. Further, a fan that generates a large amount of heat, such as a three-axis integrated servo motor drive device, is usually provided with a fan for forcedly cooling the heat sink in the same heat sink portion, but in the present embodiment, the fan can be omitted.

Example 2. The second embodiment of the present invention will be described below with reference to FIGS. In the figure, 102 is a control panel, and its housing 1 has a partition wall 6. Left and right doors 7 and 8 provided on the front surface of the housing 1 and the partition wall 6
A dust-proof compartment 111 having a large depth is formed between and. Further, a ventilation compartment 112 having a narrow depth is formed between the back plate 9 and the partition wall 6. Reference numeral 30 denotes a fan mounting duct provided on the rear side of the outer surface of the ceiling of the housing 1, which is continuous with the ventilation section 112. Above fan mounting duct 3
Inside the 0, a plurality of outside air fans 61 are horizontally arranged.

Reference numeral 31 is a heat transfer plate disposed on the upper side in the ventilation section 112. This heat transfer plate 31 is disclosed in JP-A-3-987.
As in the case of 40, a vertical inside air side rectangular flow channel 90 with an upper end sealed, and an outside air side rectangular flow channel 91 that is alternately located with the inside air side rectangular flow channel 90 and has a lower end sealed. Has been formed. The details of the structure for sealing the terminal are the same as those described in Japanese Utility Model Laid-Open No. 5-8253. The inside air side rectangular flow path 90 and the outside air side rectangular flow path 91 are formed over almost the entire ventilation section 112 by the heat transfer plate 31, but the inside air side rectangular flow path 90 is formed below the heat transfer plate 31. An inside air side space 115 communicating with is formed.

An intake port 6A communicating with the inside air side rectangular channel 90 of the heat transfer plate 31 is bored in the uppermost part of the partition wall 6, and a plurality of exhaust ports 6B communicating with the inside air side space 115 are arranged side by side in the lowermost part. Has been drilled. A plurality of inside air fans 62 are attached to the inside air space 115 at the exhaust port 6B. In order to improve the flow of air from the inside air side rectangular flow path 90 to the inside air fan 62, the height dimension of the partition wall of the heat transfer plate 31 should be about twice or more the housing thickness dimension of the inside air fan 62. It is desirable to do. For this reason, the depth dimension of the ventilation section 112 is generally larger than that of the first embodiment.

The servo motor driving device 59 and the stabilized DC power supply 60 are arranged in front of the inside air fan 62, and are spaced apart from the inside air fan 62 so as not to hinder the air flow discharged from the inside air fan 62, or by an appropriate fitting from the bottom plate 5. It is arranged so as to float. Since the other parts are the same as those in FIGS. 1 to 5, the description thereof will be omitted.

Next, the operation of the cooling structure of the control panel 102 will be described. By the operation of the inside air fan 62, the warmed air in the dustproof section 111 is sucked in through the intake port 6A as indicated by the arrow a, and is diverted in the inside air side rectangular flow passage 90 of the heat transfer plate 31 to be separated by the inside air fan 62. Forced convection circulation is performed again to return the dustproof compartment 111. On the other hand, the low-temperature air outside the panel is sucked in through the ventilation opening 9A at the lower part of the back plate as shown by the arrow b, and the outside air side rectangular flow passage 91 of the heat transfer plate 31 is drawn.
The air is diverted and discharged to the outside of the board by the outside air fan 61. Due to the forced convection in the inside air-side and outside air-side rectangular flow paths 90 and 91, heat is exchanged through the heat transfer plate 31, the air in the dustproof section 111 is cooled, and the electric and electronic devices can be cooled. As described above, the heat transfer plate 31 is combined with the outside air and inside air fans 61 and 62 to act as a heat exchanger.

In the first embodiment, the inside air fan 62 or 63 can be provided only on the inner surface side of the partition wall 6 located on the front side of the heat transfer plate 12 or 13, but the second embodiment is different.
In the above, the heat transfer plate 31 and the inside air fan 62 can be arranged vertically apart from each other. Therefore, the required cooling capacity is small, as shown in FIG.
Even when a heat transfer plate having a short vertical dimension such as 31S is used, the inside air fan 62 can be arranged at the lowermost portion close to the bottom plate 5. Therefore, it is possible to prevent the occurrence of air stagnation at the bottom of the dustproof compartment 111. In addition, the inside air fan 62 is connected to the control panel 10.
2 can be replaced from the back side, and since the inside air fan 62 is not provided in the dustproof section 111, the space for electric equipment can be widened. The same operation and effect can be obtained in the other parts which are configured in the same manner as in the first embodiment.

Example 3. The third embodiment of the present invention will be described below with reference to FIGS. In the figure, 103 is a control panel, whose housing 1 is a partition wall 6, and a dustproof compartment 1
11 and a ventilation section 112. Ventilation compartment 112
Heat transfer plates 12 and 13 are provided therein as in the first embodiment. Below the heat transfer plate 12, a heat transfer plate 14 having the same width and a short vertical dimension is arranged so as to almost reach the bottom plate 5. The intervals between the partition walls of the heat transfer plates 12 and 14 are the same, and the outside air-side rectangular flow passage 91 is formed so as to be continuous between the heat transfer plates 12 and 14.

The partition wall 6 has an intake port 6A as in the first embodiment.
And exhaust ports 6B and 6C are provided. Exhaust port 6
Internal air fans 62 and 63 are provided in B and 6C via fan mounts 17 and 18, respectively. Below the exhaust port 6B, a fourth vent port 6E and a fifth vent port 6F having the same width as the exhaust port 6B are formed. The vent holes 6E and 6F communicate with the upper and lower sides of the rectangular passage 90 on the inside air side of the heat transfer plate 14, respectively. An inside air fan 72 is provided in the fourth ventilation port 6E via the fan mount 32. The inside air fan 74 is used as a pushing fan for sending air into the heat transfer plate 14.

Further, a horizontal shelf-like plate 33 is provided from the middle portion of the vent holes 6E and 6F of the partition wall 6 toward the front. The left and right side walls 2 and 3 of the housing 1 are on the left and right sides of the shelf plate 33.
And the DC stabilizing power sources 60A and 60B and the transformer 73 which are fixed to the bottom plate 5 and are arranged on the upper surface of the bottom plate 5. The left and right side walls 2 and 3 located above the shelf top plate 33 are provided with cable lead-in holes 2A and 3A, which are provided with lead-in hole closing members 34 and 35, respectively, so that the external cable 74 can be pulled in. ing. Cable entry hole 2 above
The configurations of A and 3A may be those of JP-A-3-286598 or JP-A-4-365528. The external cable 74 drawn from the cable drawing holes 2A and 3A is laid directly or after the upper surface of the shelf upper plate 33 is wired, and then the numerical control device 51.
Connected to equipment such as. In this way, the inside air fan 62,
The front of 72 is used as a cable processing space as in the first embodiment.

FIG. 10 is a partially broken perspective view of the DC stabilized power supply 60A, and 44 is its unit case. The unit case 44, including a cover (not shown), is formed in a substantially horizontal rectangular duct shape, and its end surface flange 44A is in close contact with the partition wall 6. Fifth vent 6
F is located in the upper and lower end surface flanges 44A, and the inside air side rectangular flow channel 90 communicates with the internal space of the unit case 44. The front end of the unit case 44 is fixed to the bottom plate 5 with mounting legs 44B. A printed circuit board 75 is mounted inside the unit case 44, and a circuit board and electronic equipment are also mounted outside the printed circuit board 75. Reference numeral 67 denotes a large number of power transistors soldered to the substrate 75, which are screwed to the heat radiation fins 68 and 68 fixed to the substrate 75.
In addition, electronic components such as a substrate connector 69 are mounted on the substrate 75. Further, the stabilized DC power supply 60B is similarly configured. Since the other parts are the same as those in FIGS. 1 to 5, the description thereof will be omitted.

Next, the operation of the cooling structure of the control panel 103 will be described. The heat exchange action by the heat transfer plates 12 and 13 and the outside air and inside air fans 61, 62 and 63 is performed in the same manner as in the first embodiment. By the operation of the inside air fan 72, the air in the lower part in the dustproof section 111 is pushed in through the fourth ventilation port 6E as indicated by the arrow a2, and is diverted into the inside air side rectangular flow passage 90 of the heat transfer plate 14 to be divided into the first portion. 5 enters the stabilized DC power supplies 60A and 60B from the vent hole 6F, and after passing through the inside, most of the air is sucked into the inside air fan 72 again. Further, a part of the air discharged from the inside air fan 62 is sucked into the inside air fan 72 as indicated by an arrow a1. As a result, a part of the static pressure of the internal air fan 72 is added to the static pressure of the internal air fan 62, and the wind speed in the heat transfer plate 12 can be increased. On the other hand, the low-temperature air outside the panel is sucked in through the ventilation opening 9A at the lower part of the back plate as shown by the arrow b, splits in the outside air-side rectangular flow passage 91 of the heat transfer plate 14, and enters the upper heat transfer plate 12. . Heat exchange is performed through the heat transfer plate 14 by the forced convection circulation,
Mainly, the stabilized DC power supplies 60A and 60B and the transformer 73 are cooled.

The outside air-side and inside air-side rectangular flow passages 90 and 91 are formed by bending the heat transfer plate 1 in a corrugated shape as described above.
In addition to forming by 2 and 13, for example
It is also possible to form the same as those described in Japanese Utility Model Laid-Open No. 878 and U.S. Pat. However, in manufacturing any heat transfer plate, the vertical dimension is restricted by the thin plate material, manufacturing equipment and the like. In addition, generally, the longer the vertical dimension is, the more easily warpage occurs and the manufacturing becomes difficult. According to the third embodiment,
By combining and using the short heat transfer plates 12 and 14 which are easy to manufacture, the outside air-side and inside air-side rectangular flow paths 90 and 91 which are substantially equal to the height of the housing 1 can be economically constructed.

Although the inside air fan 72 is used as a pushing fan in FIG. 9, it may be used as a suction fan. In this case, forced convection circulation in the opposite direction to the arrow a2 is performed, and the heat generated from the DC stabilized power supplies 60A and 60B and the transformer 73 is cooled without being diffused in the dustproof section 111, but the air flow of the arrow a1 is It disappears, and the effect of it disappears. In any of the forced convection circulations described above, a high-speed airflow flows through the unit case 44, and the electronic devices therein can be cooled well. As is clear from FIG. 10, this configuration can create a partial horizontal forced convection at any place in the dust-proof compartment 111 where the vertical forced convection is created as a whole.

The vertical distance between the fourth vent 6E and the fifth vent 6F is relatively small. When the intake and exhaust ports are close to each other in this manner, short circuit circulation occurs and a problem that the space inside the panel is not cooled easily occurs. However, in the third embodiment, the shelf plate 33 is used.
Is provided, the above-mentioned problem is prevented.
The shelf-like plate 33 is a DC stabilized power source 60A, 60.
Because it is located close to B, the fifth vent 6F
The air flow a2 discharged from is prevented from being diffused by the shelf plate 33 and the bottom plate 5. Therefore, in the case of FIGS. 8 and 9, it is not necessary to form the unit case 44 of the stabilized DC power supplies 60A and 60B in a rectangular duct shape.

DC stabilized power supplies 60A, 60B, transformer 7
3 generates a relatively strong electromagnetic wave, and causes a malfunction due to noise when a signal cable is brought close to it. 8 and 9
In the above, the shelf-like plate 33 functions as a shield plate,
Since the cable 74 can be laid on the upper surface, it is not necessary to provide a large distance between the stabilized DC power supplies 60A and 60B, the transformer 73 and the cable 74, which is useful for downsizing the control panel 103. Further, the shelf-like plate 33 also functions as a cable tray, and the external cable 74 is connected to the left and right cable lead-in holes 2A and 3A.
You can orderly pull in from A.

Example 4. The fourth embodiment of the present invention will be described below with reference to FIG. In the figure, 103 is a control panel, whose housing 1 is a partition wall 6, and is divided into a dustproof section 111 and a ventilation section 112. Heat transfer plates 12, 13, and 14 are arranged in the ventilation section 112 as in the third embodiment. Similar to the third embodiment, the partition wall 6 has an intake port 6A, exhaust ports 6B and 6C, a fourth ventilation port 6E, and a fifth ventilation port 6 as well.
F is drilled. Reference numeral 36 is a connecting duct that connects the exhaust port 6B and the fourth ventilation port 6E in the dustproof compartment 111. The inside air fan 62 is disposed as a fan that is pushed into the fourth ventilation port 6E in the connection duct 36. Since the other parts are the same as those in FIGS. 9 to 10, the description thereof will be omitted.

Next, the cooling structure of the control panel 103 will be described. By operating the inside air fan 62, the dustproof compartment 1
The air inside 11 is sucked in through the intake port 6A, and the heat transfer plate 12
Of the internal air side rectangular flow path 90, then flows out from the intake port 6B and is sucked into the internal air fan 62, and further, the heat transfer plate 14
The fifth ventilation port 6
The dust-proof section 11 flows through the space between the shelf-like plate 33 and the bottom plate 5 from F.
Returned to 1. On the other hand, the low-temperature air outside the panel flows through the outside air-side rectangular flow passages 91 of the heat transfer plates 14 and 12 as indicated by the arrow b.
Heat exchange is performed via the heat transfer plates 14 and 12. The heat exchange action by the heat transfer plate 13 is performed in the same manner as in the first embodiment.

According to the fourth embodiment, the heat transfer plates 12 and 14 are
A common inside air fan 62 can be used for the above. Further, the connecting duct 36 can be used as a support fitting for a cable leading to the numerical controller 51. The same effect can be obtained in the other configurations similar to those in the first and third embodiments.

Example 5. Embodiment 5 of the present invention will be described below with reference to FIG. In the figure, 103 is a control panel, which is different from the fourth embodiment (FIG. 11) in that a fan base 37 is provided instead of the connecting duct 36, and an inside air fan 62 used as a suction fan is attached. That is. Further, in order to increase the amount of air sucked from the intake port 6B, the fourth ventilation port 6E is narrowed.
Others are the same as those in the fourth embodiment.

The air flow in the inside air side rectangular channel 90 of the heat transfer plate 14 flows in the direction indicated by the arrow a3, and heat is exchanged with the low temperature outside air b flowing in the outside air side rectangular channel 91. Also heat transfer plate 1
The heat exchange action by 2 and 13 is performed in the same manner as in the first embodiment. According to the fifth embodiment, the common inside air fan 62 can be used for the heat transfer plates 12 and 14, and the space required for the common fan base 37 can be minimized.

Example 6. Next, a sixth embodiment, which is a suitable application of the fifth embodiment, will be described with reference to FIG. In a large-sized die-sinking electric discharge machine or the like, the machining current is large, and more machining power supply unit groups 52 to 56 are required for parallel use. In such a case, the control panel 104 is configured to house only the processing power supply unit group. This control panel 104
In the dustproof section 111, the processing power supply unit groups 52 to 56 each having the ventilation duct 113 are housed in a two-tier stack. The exhaust ports 6B and 6E communicating with the inside air side rectangular flow paths of the heat transfer plates 12 and 14 are located between the upper and lower ventilation ducts 113. This exhaust port 6B, 6
A fan base 37 and an inside air fan 62 are provided on the front surface of E. The heat transfer plates 12 and 14 are configured to have the same length, and intake ports 6A and 6F are provided at the uppermost part and the lowermost part of the partition wall 6. An intake chamber 114 is formed in front of each of the intake ports 6A and 6F. As a result, upward forced convection a1 is generated in the upper ventilation duct 113,
The downward forced convection a2 flows in the lower ventilation duct 113, and the outside air b is the outside air side rectangular flow passage 91 of the heat transfer plates 14 and 12.
To continuously exchange heat. An exhaust duct 38 for the outside air fan 61 also serves as a cover for the power resistor 64.

According to the above-described embodiment, the heated exhaust heat air of the processing power supply unit groups 52 to 56 stacked vertically in two stages does not diffuse into the dustproof section 111, but flows into the inside air side rectangular flow of the heat transfer plates 12 and 14. As they are sucked into the road, they do not adversely affect each other. Also, the heat transfer plates 12 and 14 may be the same.

By the way, in the above description, except for a part such as the inside air fan 72 in FIG. 9, both the outside air fan and the inside air fan are used as a suction fan for the heat transfer plate, and are installed on the exhaust port side of the heat transfer plate. An example of the arrangement is shown. this is,
This is to simplify the drawing and the description. There is virtually no difference whether the air is sucked in from the heat transfer plate or pushed into the heat transfer plate.A fan is installed on the intake side of the heat transfer plate and used as a pushing fan against the heat transfer plate. May be. Further, fans may be provided on both the exhaust port side and the intake port side for tandem use. The fan used in the above embodiment is a general axial fan, and the fan housing is simply installed in the opposite direction to the case where the air is passed in the suction direction and the case where the air is passed in the push direction with respect to the heat transfer plate. Just enough. Therefore, although the ventilation port of the partition wall 6 is described as being divided into an intake port and an exhaust port for convenience of description, it should not be limited to either one.

Example 7. The seventh embodiment of the present invention will be described below with reference to FIGS. In the figure, 52 is a pulse power supply unit, which is another embodiment of the one described in the first embodiment. Reference numeral 45 denotes a unit case of the pulse power supply unit 52, which includes a front plate 46, a rear plate 47, a pair of unit rails 42, a pair of board mounting plates 43, and a support plate 49. The unit rail 42 has a U-shaped cross section, is arranged at the upper and lower ends between the front plate 46 and the rear plate 47, and connects them. Fixing holes 46A are provided on the upper and lower sides of the front plate 46, and the side bending portion 46 is provided on the right end.
B is formed. Notches 47A for receiving the guide rails are provided on the upper and lower sides of the rear plate 47, and a side bent portion 47B is formed at the right end. The board mounting plate 48 has an L-shaped cross section and is welded to the upper and lower unit rails 42, respectively. The support plate 49 is made of metal such as aluminum or iron, and is detachably screwed as described later.

Reference numeral 80 denotes a printed circuit board, which is the board mounting plate 4 described above.
It is fixed at 8. Reference numeral 81 is a large number of power transistors, the terminals 81B of which are inserted and soldered from the solder surface side of the printed circuit board 80. Reference numerals 82 and 83 denote a large number of electronic components for snubbers, gate drives, etc., which are inserted from the component side of the printed circuit board 80 and soldered. Reference numeral 84 denotes a plurality of heat sinks, which are three surfaces including a base surface 84A and side surfaces 84B and 84C, which are flat surfaces in the longitudinal direction.
It is a substantially rectangular parallelepiped having one surface on which a plurality of rows of fins 84D are formed. In FIG. 14, the two heat sinks 84 facing each other are arranged in the depth direction in the unit case 45, and the side surface on the printed circuit board 80 side is 84B and the support plate 50 side is 84C. The power transistors 81 are grouped according to an electric circuit, and the screws 85 penetrating the head of the resin package portion 81A
It is screwed to the base surface 84A of the heat sink.

Reference numeral 86 denotes a general insulating bush fitted and mounted on the printed circuit board 80, and the side surface 84B of the heat sink and the printed circuit board 80 are fixed by screws with a screw 87 passing through the bush. Screw 87 and printed circuit board 80
Insulation bush 8 if the insulation distance from the live part of
6 may be a spacer. After the screw fixing, the power transistor terminal 81B is soldered. Thereafter, the support plate 49 is screwed and fixed to the front surface 84C of the heat sink with the screw 88. Further, the front and rear side ends of the support plate 49 are fixed by screws 89 to the side surface bent portions 46B and 47B of the front and rear face plates.
Fixed to. A step portion 84E is formed between the side plate 84C of the heat sink and the outer fin 84D1, and an air passage is formed between the outer fin 84D1 and the support plate 50.

The heat sink 84 is of a large size and is used to cool a large number of power transistors.
Its weight is also large. The side surface 84B is the printed circuit board 80.
If it is only fixed to the
Is repeatedly deformed in a wavy manner, and stress is applied to the terminals 81B of the power transistor to cause fatigue breakage or conduction failure inside the resin package portion 81A. According to the present embodiment, since each heat sink 84 is firmly supported by the support plate 49, even if a large transport vibration is applied, the heat sink 84 does not shake and the printed circuit board 80 does not deform, and the above-mentioned problems are prevented. To be done.

Most of the heat generated in the power transistor 81 is transferred to the heat sink 84 and is radiated from the surface of the heat sink 84 arranged in the forced convection. Further, a part of the heat transferred to the heat sink 84 is transferred to the metal support plate 49 from the side surface 84C. It is desirable to apply a heat transfer compound to the side surface 84C in order to favorably perform the above transfer. Since the support plate 49 has a large area and is also disposed in the forced convection, the same effect as that of increasing the surface quality of the heat sink 84 can be obtained.
The temperature rise of the power transistor 81 can be reduced. Also,
The support plate 49 allows the printed circuit board 80 and the front and rear face plates 4 to be
Since a vertical ventilation duct is formed between the air ducts 6 and 47, the airflow is prevented from escaping to the side, and the wind velocity of the forced convection is increased.

Since the power transistor 81 is a pulse power source, it generates an electromagnetic wave with a high speed switching operation. According to this embodiment, the power transistor 81 is surrounded by the metal support plate 49, the front plate 46 and the rear plate 47 in the right side surface direction. In addition, the unit 52 of FIG.
You can enclose all four sides by arranging a symmetrical unit on the left side. Therefore, the electromagnetic energy emitted from the unit 52 is generated by the support plate 49, the front plate 46, and the rear plate 4.
Since it is absorbed by 7, it is possible to reduce electromagnetic interference of other units arranged on the side surface.

[0073]

As described in detail above, the present invention has the following excellent effects. First, the heat transfer plate for heat exchange is arranged in the ventilation section formed on the entire back surface of the control panel, so that the space around the heat transfer plate can be effectively used.

Further, since the heat transfer plate is divided into the upper stage and the lower stage, the heat transfer plate can be obtained which is easy to manufacture without deteriorating the cooling capacity.

Further, since the inside air fan is provided in the ventilation port connecting member, it is possible to obtain the one in which the inside air fan of the upper heat transfer plate and the lower heat transfer plate are shared.

Further, a heat transfer plate having a rectangular flow path on the outside air side whose lower end is sealed is hung vertically in a ventilation section formed on the entire back surface of the control panel, and the lower part of the partition wall is near the inside air side rectangular flow path opening. Since the inside air fan attached to the ventilation port of is provided, it is possible to effectively use the lower space in the ventilation compartment.

Further, since the heat sink portion is provided so as to penetrate through the ventilation compartment and the heat sink portion is projected into the outside air-side rectangular flow path, it is possible to reduce the heat generation amount in the dustproof compartment.

Further, the partition wall is provided with an intake port formed at the uppermost part of the internal air side rectangular flow path, and a ventilation duct is provided by the front plate of the unit case and the side plate of the housing below the intake port.
Since the intake chamber is provided by the closing member that seals between the upper end of the unit case and the ceiling plate, the convection generated by heat passes from the ventilation duct into the intake chamber, so that airflow loss can be prevented.

Further, since the inside air fan is provided in the ventilation hole formed in the partition wall below the inside air side rectangular flow passage, the inside air fan forcedly convects the inside of the rectangular duct-shaped unit case. The thing which can cool the components in a unit case is obtained.

Further, a numerical controller fixed below the processing power supply unit, a cable processing section for connecting a cable below the numerical control apparatus, and an inside air fan attached to the fan base in the rear direction of the cable processing section. Therefore, since heat is exchanged, as a result, a cable is present in front of the inside air fan, and air resistance can be reduced.

Further, a power supply device fixed on the bottom surface of the dustproof compartment, a horizontal shelf plate fixed on the upper surface of the power supply device, and a partition wall provided with ventilation to perforate the inside air side rectangular flow path below the shelf plate. Since the mouth is provided and the cable connected to the numerical control device is provided on the upper part of the shelf-like plate, as a result, the shelf-like plate can prevent short-circuit circulation of the air flow near the vent hole.

Also, an accessory box having a heating element fixed to the upper surface of the ceiling plate, an exhaust duct whose front side is open, and a notch in the ceiling plate are provided around the exhaust box to fix the exhaust duct to the upper surface of the ceiling plate. Since the above-mentioned heating element is air-cooled through the exhaust duct by the exhaust flow generated by the heat exchanger, it is possible to obtain a heating element which can be forcedly cooled.

Further, since the heat sink is fixed to the printed circuit board having the semiconductor power components fixed to the heat sink and the metal supporting plate which is a part of the vertically arranged printed circuit board, heat transfer to the metal supporting plate is achieved. The result is that heat dissipation is promoted.

[0084]

[Brief description of drawings]

FIG. 1 is a front view of a control panel according to a first embodiment of the present invention, excluding a door.

2 is a cross-sectional view taken along the line AA shown in FIG.

FIG. 3 is a cross-sectional view taken along the line BB shown in FIG.

FIG. 4 is a cross-sectional view taken along the line C-C shown in FIG.

FIG. 5 is an enlarged view of the upper part of FIG.

FIG. 6 is a front view of a control panel according to a second embodiment of the present invention, excluding a door.

FIG. 7 is a cross-sectional view taken along the line DD shown in FIG.

FIG. 8 is a front view of a control panel according to a third embodiment of the present invention, excluding a door.

9 is a cross-sectional view taken along the line EE shown in FIG.

10 is a partially cutaway perspective view of the unit portion shown in FIG.

FIG. 11 is a sectional view of a control panel according to a fourth embodiment of the present invention, which corresponds to FIG. 9.

FIG. 12 is a sectional view of a control board according to a fifth embodiment of the present invention, which corresponds to FIG. 9.

13 is a sectional view of a control panel according to a fifth embodiment of the present invention, which corresponds to FIG. 9.

FIG. 14 is a plan view of a seventh embodiment of the unit according to the present invention.

FIG. 15 is a front view of FIG.

[Explanation of symbols]

 1 Case 6 Partition Wall 6A Intake Ports 6B, 6C Exhaust Port 6E Fourth Vent Port 6F Fifth Vent Port 9 Back Plate 9A Vent Opening 10 Exhaust Duct 12, 13, 14, 31 Heat Transfer Plate 12A Partition Wall 12B Bridge Envelope 12C Flange 17, 18, 32, 37 Fan stand 19 Closing member 21 Upper guide rail 22 Lower guide rail 23 Front lateral member 26 Guide blade 33 Shelf plate 36 Connecting duct 41, 43, 44, 45 Unit case 42 Unit rail 46 Front plate 47 Rear plate 49 Support plate 51 Numerical control device 52 to 56 Pulse power supply device unit 57, 58 Control unit 59 Servo motor drive device 60 DC stabilized power supply 61 Outside air fan 62, 63, 72 Inside air fan 64 Power resistor 66 , 75, 80 Printed circuit board 67, 81 Power transistor 68 Heat dissipation filter 74 external cable 84 heat sink 90 inside air side rectangular flow path 91 outside air side rectangular flow path 101, 102, 103, 104 control panel 111 dust-proof section 112 ventilation section 113 ventilation duct 114 intake chamber

Claims (11)

[Claims] 1. A control panel having a housing composed of a front door, a back plate for the back surface, and a top plate, and a partition wall for partitioning the front surface and the back surface of the housing, and the control device housed in the front surface of the housing. A dust-proof compartment is provided, and a ventilation compartment for accommodating the heat transfer plate of the heat exchanger is provided on the back surface of the housing, and a substantially rectangular air passage in the vertical direction with the upper and lower ends sealed in almost the entire area of the ventilation compartment. The heat transfer plate bent in a corrugated shape consisting of an open air side rectangular flow path with open upper and lower ends is hung vertically, and ventilation holes are provided in the upper and lower parts of the partition wall to form the inside air side rectangular flow path. An opening formed in the outside air side rectangular channel in the lower part of the back plate and the back part of the top plate, which is the outer wall of the ventilation compartment, and an inside air fan attached to the ventilation port; and an outside air fan attached to the opening. And the inside air side rectangle is provided by operating the inside air fan and the outside air fan. A control panel, characterized in that heat is exchanged by a heat transfer plate composed of a flow path and the external air rectangular flow path. 2. A partition wall for partitioning the front surface and the back surface of the housing, a heat exchanger comprising at least two upper heat transfer plates and lower heat transfer plates, and the partition wall for the inside air side of the upper heat transfer plates. A first vent hole formed in the lower part of the flow path and a second vent hole formed in the upper part of the inside air side flow path of the lower heat transfer plate are provided, and the first vent hole and the second vent hole are provided. With an inside air fan that adheres,
The control panel according to claim 1, wherein the exhaust air from the first ventilation port is pushed into the second ventilation port by the inside air fan to blow the air. 3. A partition wall for partitioning the front surface and the back surface of the housing, a heat exchanger comprising at least two upper heat transfer plates and lower heat transfer plates, and the partition wall for the inside air side of the upper heat transfer plates. A first vent hole formed in the lower part of the flow path and a second vent hole formed in the upper part of the inside air side flow path of the lower heat transfer plate are provided, and the first vent hole and the second vent hole are provided. The ventilation hole connecting member consisting of one of a duct and a fan base for connecting the ventilation holes of the above, and an inside air fan attached to the above ventilation hole connecting member, and the inside air inside the rectangular channel on the inside air side by the inside air fan. The control panel according to claim 1, wherein the forced convection occurs. 4. The heat transfer plate bent in a corrugated shape, which is composed of a vertical inside air side rectangular flow passage with a sealed upper end and an outside air side rectangular flow passage with a sealed lower end over almost the entire area of the ventilation compartment. And a first vent hole provided in the upper part of the partition wall to be bored in the inside air side rectangular flow path, and a second vent hole provided in the lower part of the partition wall in the vicinity of the inside air side rectangular flow path port. A ventilation hole is provided, an opening is formed in the lower portion of the back plate that is the outer wall of the ventilation compartment and a back portion of the top plate, and an opening is formed in the outside air side rectangular flow path, and an inside air fan attached to the ventilation hole and the opening. A control board comprising: an outside air fan attached to the inside air fan, and operating the inside air fan and the outside air fan to perform heat exchange by a heat transfer plate including the inside air side rectangular flow path and the outside air rectangular flow path. 5. A control panel having a housing composed of a front door and a back plate for the back surface, and a partition wall for partitioning the front surface and the back surface of the housing, and a device including a semiconductor power component on the front surface of the housing. And a heat sink part fixed to the semiconductor power component, and an angular opening for penetrating the heat sink part in the outside air side rectangular flow path, and the device fixed to the partition wall. The control panel according to any one of claims 1 to 3, wherein the heat sink portion is provided so as to penetrate the angular opening so that the heat sink portion projects into the outside air-side rectangular flow path. 6. A control panel having a casing composed of a front door, a back plate for the rear surface, a ceiling plate, and a side plate, and a partition wall for partitioning the front surface and the rear surface of the housing, and a rectangular flow path on the inside air side for the partition wall. An air intake opening is provided at the top of the unit, and a unit case for housing a unit including electronic components is fixed below the air intake opening, and the upper and lower surfaces are opened from the front plate of the unit case and the side plate of the housing. The control panel according to any one of claims 1 to 4, further comprising: a ventilation duct that is provided, and a closing member that seals between an upper end of the unit case and the ceiling plate. 7. A partition wall for partitioning the front surface and the back surface of the housing, a unit containing electronic parts, a rectangular duct-shaped unit case for housing the unit, and a partition wall with an upper portion of an internal air side rectangular flow path. The first air vent to be installed and the second air vent to be bored in the lower portion of the inside air side rectangular flow path are provided, the unit case is attached to the first air vent, and the inside air is attached to the second air vent. The control panel according to any one of claims 1 to 5, further comprising a fan, wherein the air inside the panel is forced to convection in the unit case by the inside air fan. 8. A numerical control device for partitioning a front surface and a back surface of a housing, a dustproof compartment for housing a plurality of processing power supply units on the front surface side of the housing, and fixing it below the processing power supply unit. A cable connected to the numerical control device, a cable processing unit connecting the cable below the numerical control device, a horizontal fan mount fixed in the rear direction of the cable processing unit, and the fan mount. 2. An inside air fan attached to the inside of the air conditioner.
The control panel according to any one of to 6. 9. A control panel having a housing composed of a front door and a back plate for a back surface, a partition wall for partitioning the front surface and the back surface of the housing, and a power supply fixed to the bottom surface of the dustproof compartment which is the back surface of the housing. A device, a horizontal shelf plate fixed to the upper surface of the power supply device, a ventilation hole for forming a rectangular flow path on the inside air side in the lower part of the shelf plate on the partition wall, and an upper part of the shelf plate. The control panel according to claim 1, further comprising: a cable connected to the numerical control device. 10. A control panel having a housing composed of a front door, a back plate for the back surface, a ceiling plate, and a side plate, and a partition wall for partitioning the front surface and the back surface of the housing, and a heat exchanger on the back surface of the housing. A ventilation compartment for housing the heat transfer plate is provided, a cutout portion that penetrates the ventilation compartment portion is provided in the ceiling plate, an accessory box having a heating element fixed to the upper surface of the ceiling plate, and the front side are opened. An exhaust duct, and the exhaust duct is provided around the cutout portion to fix the exhaust duct to the upper surface of the ceiling plate, and the exhaust flow generated by the heat exchanger is cooled by air through the exhaust duct. The control panel according to any one of claims 1 to 7. 11. A printed circuit board having a semiconductor power component fixed to a heat sink, a metal supporting plate which is a part of the vertically arranged printed circuit board and a printed circuit board comprising the metal supporting plate. The control panel according to any one of claims 1 to 5, wherein the heat sink is fixed to the unit case and the metal supporting plate.