JP2580507Y2 - Electronic equipment cooling device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling device for an electronic device, such as a control panel, containing electronic components.

[0002]

2. Description of the Related Art An electronic device such as a control panel of an NC machine tool is often installed in a work environment with much dust and dust. And due to the nature of the functions required of the control panel, a unit that emits heat is built into the box-shaped case, promoting not only heat conduction but also air flow, and releasing the heat generated by the unit to the outside of the case, That is, it is necessary to perform forced air cooling of the box case having the completely closed structure. Conventional cooling devices for electronic devices are as shown in FIGS. In the figure, reference numeral 1 denotes a box-shaped case (hereinafter referred to as a case) constituting a control panel body.
The electronic components are housed inside and have a completely closed structure. Reference numeral 2 denotes a unit of an electronic component that generates a large amount of heat, and is attached to the case 1 with radiation fins 3 protruding outside the case 1. Reference numeral 4 denotes a cooling duct, which is provided on the outer frame of the case 1 for cooling the radiating fins 3, has a duct fan 5 mounted in the duct, allows outside air to flow in the duct, and removes heat generated from the radiating fins 3. I carry it out of the case. At this time, the box-shaped case 1 and the cooling duct 4 are completely shut off, and the wind in the duct does not flow into the case 1. Reference numeral 6 denotes a unit which generates less heat than the unit 2, and is mounted in the case 1. Reference numeral 7 denotes a heat exchanger for releasing heat trapped in the case 1 to the outside.
It is attached to the inner side surface of the case 1. The heat exchanger 7 has a large number of corrugated fins 8, forms an outside air ventilation passage 9 and an inside air circulation passage 10 between the fins 8, and has duct fans 11 and 12 respectively. 13 is an intake port for the cooling duct 4, and 14 is an exhaust port. Reference numeral 15 denotes an inlet for a heat exchanger, and reference numeral 16 denotes an outlet. In such a configuration, the cooling of the case 1 inside the air of increased by heat generated from the units 2 and 6, carried out by circulating within the case 1 through the inside air in the inside air circulation path 10 of the heat exchanger 7.
That is, in the heat exchanger 7, the heat of the inside air is transferred to the cooling air passing through the outside air ventilation passage 9 which is in contact with the inside air circulation path 10 through the wavy fins 8, thereby cooling the air in the case 1. You do it.

[0003]

However, the prior art has the following problems. (1) Since only the mounting surface of the unit 2 having the radiating fins 3 has a duct structure, the duct is formed only on one portion on the back surface, and the structure of the case 1 is complicated and the productivity is poor. (2) Since the heat exchanger is usually installed on the side, external air suction and discharge ports are required on the side of the housing, and a space for intake and exhaust is required between the heat exchanger and external devices. Poor space effect. In addition, since the high-temperature exhaust gas flows toward the external device, there is a possibility that the external device may be adversely affected by heat. Accordingly, the present invention is to manufacture of box-shaped case has an object to provide a cooling device of good, and good electronic equipment space efficient.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a cooling device for an electronic device according to the present invention is provided with a box-shaped case having a completely closed structure in which electronic components are housed, and formed on the back of the box-shaped case. A cooling duct, having a radiating fin, a heat exchanger, and a duct fan mounted in the cooling duct, wherein the cooling duct is cut off from the inside of the box-shaped case, and from the ceiling of the box-shaped case. Extending to the bottom, the heat exchanger has an internal air circulation path and an external air ventilation path,
The intake port and the exhaust port of the internal air circulation path are communicated with each other inside the box-shaped case, and the radiating fins are fixed to a unit of a large heat-generating electronic component disposed inside the box-shaped case, and the heat exchange The duct fan is disposed downstream of the heat exchanger, and the duct fan includes an outside air passage and an inside air circulation passage, and in the outside air passage and the inside air passage, the flow of the cooling air is from the heat exchanger side to the radiation fin side. It is designed to be installed in a cooling duct.

[0005]

By the action above means, the cooling device is arranged only on the back one position of the case, moreover since almost all surface of the back constitute a cooling duct, manufacture of the casing is facilitated. Also,
Since there is no intake port or exhaust port on the side of the case, the cooling performance is not affected even if it is arranged close enough to be in contact with an external device, and the external device is not adversely affected by the exhaust heat.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 is a side sectional view showing an electronic apparatus, FIG. 2 is a sectional view taken along line AA in FIG. 1, and FIGS. 3 and 4 are perspective views showing a heat exchanger. The same reference numerals as those in the conventional example indicate the same or corresponding parts. In the drawing, reference numeral 17 denotes a cooling duct which extends from the ceiling to the bottom of the case 1 and is formed.
The inside of the case 1 is shut off. Reference numeral 18 denotes a heat exchanger having an inside air circulation path 19 and an outside air ventilation path 20 partitioned by a number of wavy fins 8, and connecting an intake port 21 and an exhaust port 22 of the inside air circulation path 19 to the inside of the case 1. The intake port 23 and the exhaust port 24 of the outside air passage 20 communicate with the inside of the cooling duct 17. 19a is a seal for forming the inside air circulation path 19. Numeral 25 denotes a duct fan for the outside air passage, which is arranged above the cooling duct 17. Reference numeral 26 denotes a duct fan for circulating internal air, which is arranged below the heat exchanger 18. Reference numeral 27 denotes an intake port of the cooling duct 17, formed below the cooling duct 17, and connected to the outside air passage 2 of the heat exchanger 18.
0 is in direct communication with the intake port 23. Reference numeral 28 denotes an exhaust port of the cooling duct, which is formed above the cooling duct 17.
The flow of the cooling air in the outside air ventilation path 20 and the inside air circulation path 19 is set so that the flow is from the heat exchanger 18 side to the radiation fin 3 side. In such a configuration, cooling of the electronic device is performed as follows. Duct fan 2
5 drives the outside cooling airflow into the outside air passage 20. In addition, the case 1 is driven by the driving of the duct fan 26.
In particular, the inside air around the unit 6 is the intake port 2 of the heat exchanger 18.
1. Circulate inside the case 1 through the inside air circulation path 19 and the exhaust port 22. In the heat exchanger 18, heat is exchanged between the inside air and the outside air of the case 1, and the temperature of the inside air is reduced, thereby cooling the unit 6 in particular. The heat exchange
The exchanger 18 is fixed to the unit of the electronic component that generates a large amount of heat.
Is located upwind with respect to the radiating fins 3
Then, the unit 2 that generates a large amount of heat is cooled,
The heat exchanger is heated by the wind,
The temperature of the cut 6 does not become high. Further, with respect to the unit 2 that generates a large amount of heat, the cooling air that has passed through the outside air passage 20 of the heat exchanger 18 is applied to the fixed radiation fins 3 so that the heat of the unit 2 is released from the radiation fins 3. We are trying to dissipate. Since the unit 2 generates a large amount of heat, even if the temperature of the cooling air slightly increases through the heat exchanger 18, the heat radiation effect from the heat radiation fins 3 is high. In the case of a small-capacity electronic device in which heat generated from the unit 2 is small, the configuration of the heat exchanger 18 is changed to the configuration shown in FIG.
Instead of having a large number of wavy fins 8 as shown in FIG. 4, a configuration may be adopted in which the outside air ventilation path 20 and the inside air circulation path 19 are separated by a flat partition plate 29 as shown in FIG. In this case, the heat exchanger 18 can be easily manufactured.

[0007]

As mentioned [devised effect above, the following in accordance with the present invention
The effect is as follows. (1) a cooling device only towards the rear of the chassis 1 are arranged, moreover with substantially the entire back surface constituting a cooling duct 17, Quai
The exhaust port 28 is provided in the upper or lower part of the base 1
The case 1 has good manufacturability and good space efficiency.
And close enough to make contact with external devices
Has no effect on the cooling performance, and exhaust heat
It is possible to provide a cooling device for an electronic device that does not adversely affect the electronic device. (2) Arrange the heat radiation fins 3 downstream of the heat exchanger 18
The unit 2 that generates a large amount of heat is cooled to a high temperature.
Heat generated by the heat exchanger 1 of the unit 6 that generates a small amount of heat
8 does not come into contact with the
Has no effect. (3) The cooling air in the cooling duct 17 is
After cooling the unit 6, the heat radiation
Even if it proceeds to the direction of the unit 3, the heat generation amount of the unit 2 is
Because of the large amount of cooling air passing through the heat exchanger 18
Even if the temperature rises, the heat radiation from the radiation fins 3 is sufficiently effective
Can be done effectively.

[Brief description of the drawings]

FIG. 1 is a side sectional view of an electronic apparatus showing a first embodiment of the present invention.

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

FIG. 3 is a perspective view of the heat exchanger according to the first embodiment of the present invention, as viewed from the outside of the box-shaped case;
(B) is the perspective view seen from the inside of the box-shaped case.

FIG. 4 is a side sectional view of an electronic apparatus according to a second embodiment of the present invention.

FIGS. 5A and 5B show a conventional electronic device, in which FIG. 5A is a side view and FIG. 5B is a front view.

FIG. 6 is a sectional view taken along line BB in FIG. 5;

7A and 7B show an electronic device of a conventional example, and FIG.
3A is a cross-sectional view taken along the line CC, and FIG. 3B is a cross-sectional view taken along the line DD in FIG.

FIG. 8 is a rear view of an electronic apparatus showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Box-shaped case 2 Unit of electronic component with large heat generation 3 Radiation fin 6 Unit of electronic component with small heat generation 8 Wavy fin 17 Cooling duct 18 Heat exchanger 19 Inside air circulation path 20 Outside air ventilation path 21 Intake port 22 Exhaust port Reference Signs List 23 Inlet of outside air passage 24 Outlet of outside air passage 25 Duct fan for outside air passage 26 Duct fan for inside air circulation passage 27 Cooling duct inlet 28 Cooling duct outlet 29 Partition plate

Claims (1)

(57) [Scope of request for utility model registration] 1. A box-shaped case having a completely closed structure accommodating electronic components, a cooling duct formed on the back of the box-shaped case,
The cooling duct has a radiation fin, a heat exchanger, and a duct fan mounted in the cooling duct, and the cooling duct is cut off from the inside of the box-shaped case, and extends from the ceiling to the bottom of the box-shaped case. The heat exchanger has an internal air circulation path and an external air ventilation path, and connects an intake port and an exhaust port of the internal air circulation path to the inside of the box-shaped case. While being fixed to the unit of the arranged electronic component having a large calorific value, and arranged downstream of the heat exchanger, the duct fan includes an outside air ventilation path and an inside air circulation path, and has an outside air ventilation path and A cooling device for an electronic device, wherein the cooling device is installed in a cooling duct such that a flow of cooling air flows from a heat exchanger side to a radiation fin side in an inside air ventilation path.