JP6337560B2 - Electronic equipment with cooling mechanism - Google Patents

Description

  The present invention relates to an electronic device including a cooling mechanism, and more particularly to an electronic device including an efficient cooling mechanism in an electronic device in which a plurality of devices are combined.

  There are two types of transmitters for radio relay transmission equipment (FPU: FIELD Pickup Unit) for television broadcasting: large (generally less than 10 kg) and small (generally several kilograms). A large transmitter has a large output but is unsuitable for carrying, while a small transmitter has a small output but has good portability, and is used to send signals wirelessly to a receiver attached to a camera. Since it is a relay device, it is rarely operated at all times, and there is a device that can be used as a large transmitter by attaching an output amplifying device to a small transmitter as required.

JP 2011-191974 A

  As described above, an electronic device that functions alone may be used by being incorporated into another device depending on the application. In many cases, electronic devices are cooled by a fan or the like so that the temperature is lower than the allowable temperature. Generally, when two electronic devices are in one housing, the heat source approaches and warms up. Becomes worse.

Patent Document 1 describes an information device that accommodates two servers in one rack. A first server and a second server having an intake port and an exhaust port on the back panel are accommodated in a rack so that the intake port and the exhaust port face each other, and exhaust from the exhaust port of the first server is A cooling mechanism is described that cools by passing through a heat exchanger and sucks air at an air intake port of a second server that is installed facing the heat exchanger.
Since the exhaust port and the intake port face each other at close positions, if it is left as it is, high-temperature exhaust air is sucked into the adjacent server and cooling efficiency deteriorates. Therefore, in patent document 1, the heat exchanger is installed in between and the exhaust gas is cooled before being sucked into the adjacent server, so that an extra heat exchanger is required.

  An object of the present invention is to solve the above-described problems and provide an electronic device including an efficient cooling mechanism even when a plurality of devices are combined.

  The present invention is an electronic device capable of combining a first device and a second device and having a cooling mechanism, wherein the first device and the second device each include an air inlet and An exhaust port is provided, the first device is provided with a fan, the refrigerant exhausted from the exhaust port of the first device is sucked in by the intake port of the second device, and the sucked refrigerant is supplied to the second device. It is the electronic device provided with the cooling mechanism which exhausts to the exhaust port.

  In addition, the present invention is an electronic device that can combine the first device and the second device and includes a cooling fan, and whether or not the first device and the second device are combined. When it is determined that the combination is determined by the determination unit and the determination unit, the temperature of the first device and the second device is measured, and when it is determined that the combination is not performed, the first device An electronic device comprising: temperature measuring means for measuring the temperature of the device; and cooling fan control means for controlling the number of rotations of the cooling fan based on the temperature measured by the temperature measuring means.

  ADVANTAGE OF THE INVENTION According to this invention, even when a some apparatus is combined, the electronic device provided with the efficient cooling mechanism can be provided.

It is a perspective view which shows the electronic device of 1st Embodiment. It is a perspective view explaining the position of the air intake / exhaust port for the cooling air of the electronic device of 1st Embodiment. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the electronic device of the 1st Embodiment of this invention, (a) is a top view, (b) is a front view, (c) AA sectional drawing, (d) is BB sectional drawing, ( e) is a right side view. It is a flowchart which shows the fan control of 2nd Embodiment of this invention.

(Embodiment 1)
A first embodiment of the present invention will be described with reference to FIGS.
(Description of configuration)
As shown in FIG. 1, the electronic device 10 according to the present embodiment includes a small transmitter 11, an output amplifying device 12, a drip-proof cover 13, and the like. The small transmitter 11 is assumed to be portable.

The small transmitter 11 has a rectangular parallelepiped shape. As shown in FIG. 1, a recessed space is formed in the output amplifying device 12.
This is because the small transmitter 11 is placed so that the drip-proof cover 13 can be easily put on the both. The small transmitter 11 and the output amplifier 12 are connected by a connector 14. The drip-proof cover 13 has a substantially U-shaped cross section. Reference numeral 25 denotes a positioning component for mounting the small transmitter 11. There is a positioning part 35 on the corresponding bottom surface of the small transmitter 11, and the small transmitter 11 is fixed by the positioning parts 25 and 35. The output of the small transmitter 11 is smaller than the output of the output amplifying device 12, so that the amount of heat generated during operation is smaller than that of the output amplifying device 12.

After connecting the small transmitter 11 and the output amplifying device 12 (arrow a), the drip-proof cover 13 is attached (arrow b).
Packing (not shown) is attached to the drip-proof cover 13, and the gap between the small transmitter 11 and the output amplifying device 12 is sealed to form one electronic device 10 having drip-proof performance.

For ease of understanding, known parts that are used in the small transmitter 11 and the output amplifier 12 such as screws, packing, printed circuit boards, liquid crystal display devices, buttons and other input devices, connectors, etc. In FIG.
(Description of operation)
The order of intake and exhaust in this embodiment is shown in FIG. 2 (exploded view) and FIG.
Air flows in the order of Irohani in FIG. 3 by the fan of the small transmitter to cool the inside of the apparatus. 2 is an exploded view of the electronic device 10 of FIG. 1, and the air flow is difficult to see although it is easy to see the intake and exhaust ports. Therefore, FIG. 3 is also prepared.
3A is a top view of the electronic device 10, FIG. 3B is a front view, FIG. 3C is a cross-sectional view taken along the line AA, FIG. 3D is a cross-sectional view taken along the line BB, and FIG.

  First, in FIG. 3 (a), air is sucked from the drip-proof cover inlet 15 (corresponding to the opening in the claims). The drip-proof cover intake port 15 has an opening on the bottom surface side so that rain does not enter, and has a structure for intake from the opening. The drip-proof cover inlet 15 is provided at a position opposite to the small transmitter inlet 16 with the small transmitter 11 in between. Next, in (b), air passes through a portion inside the drip-proof cover 13 and outside the small transmitter 11. At this time, the exterior of the small transmitter 11 is cooled.

Next, in (c), air is sucked from the small transmitter inlet 16, passes through the small transmitter 11, and cools heat-generating components such as LSIs and capacitors on the printed circuit board provided inside. Thereafter, the air is exhausted at the small transmitter exhaust port 17. The small transmitter exhaust port 17 has a fan 20 that rotates and exhausts the fan 20. An output amplifying device intake port 18 is provided directly below the small transmitter exhaust port 17, and air exhausted by the fan 20 is sucked into the output amplifying device 12 .

Finally, in (d), it passes through the half inside of the output amplifier 12. At this time, the output amplifier 12 is cooled.
Thereafter, the air is discharged from the output amplifier exhaust port 19 to the outside of the electronic device 10.

  The semi-internal meaning is that this cooling air does not pass directly through the printed circuit board and connectors (not shown) mounting portion 12a inside the output amplifying device 12, but the air passes through a separately provided flow path shape portion 12b. It shows that.

In this way, the dust-proof property of the output amplifying device 12 alone is enhanced without using a dust-proof filter or the like that provides resistance to intake and exhaust.
Of course, if dustproof performance and intake / exhaust resistance are not a problem, air may actually be passed into the output amplifying device 12.

The flow path shape portion 12b is separated from the mounting portion 12a but is thermally connected, and the air flowing through the flow path shape portion 12b cools a heat generating component (not shown) mounted on the mounting portion 12a. To do. In the present embodiment, the flow rectifying plate 40 is provided in the flow path shape portion 12b to regulate the air flow in the flow path shape portion 12b.
(Explanation of effect)
The present embodiment has the following effects.
(1) Since the exhaust from the small transmitter 11 is also used for cooling the output amplifying device 12, highly efficient cooling can be performed. The calorific value of the small transmitter 11 is smaller than the calorific value of the output amplifier 12. Therefore, the air that cools the small transmitter 11 and flows into the output amplifying device 12 maintains a temperature low enough to cool the output amplifying device 12.
(2) The intake / exhaust position is far away, and the exhausted warm air is not inhaled. As apparent from FIGS. 1 to 3, the distance from the drip-proof cover intake port 15 to the output amplifier exhaust port 19 is a distance obtained by adding the lengths of the small transmitter 11 and the mounting portion 12a. In other words, the drip-proof cover intake port 15 and the output amplifier exhaust port 19 are provided in a positional relationship with the small transmitter 11 and the output amplifier 12 sandwiched therebetween. For this reason, it is difficult for warm air exhausted from the output amplifier exhaust port 19 to be sucked into the drip-proof cover intake port 15.
(3) Since air flows smoothly in the small transmitter 11, the output amplifying device 12, and the drip-proof cover 13, heat does not accumulate inside the electronic device 10.

In the above embodiment, the drip-proof cover 13 is used to cover both the small transmitter 11 and the output amplifier 12.
However, if the drip-proof performance is not necessary, the drip-proof cover 13 is not provided and the operation can be performed in a bare state.

  In the above embodiment, the drip-proof cover inlet 15 is located facing the side surface of the small transmitter 11. This is because, as shown in the front view of FIG. 3B, the width of the small transmitter 11 is made narrower than the width of the lower surface of the output amplifying device 12 serving as a pedestal, This is because a gap is provided on the side surface of the small transmitter 11 to facilitate intake.

However, the position of the intake port 15 is not limited to this, and can be provided at a position facing the side surface of the mounting portion 12a of the output amplifying device. For this purpose, the width of the drip-proof cover 13 may be slightly widened, the width of the mounting portion 12a may be slightly narrowed, the rotational speed of the fan 20 may be increased, and the like.
When the intake port 15 is provided at this position, the positions of the small transmitter exhaust port 17 and the small transmitter intake port 16 may be exchanged.

In the above embodiment, the output amplifying device 12 does not have a fan. However, a fan may be provided at the output amplifier exhaust port 19. In this way, the burden on the fan 20 of the small transmitter 11 can be reduced, and heat generation from the fan 20 itself can be suppressed.
(Embodiment 2)
(Description of configuration)
In the first embodiment, only the intake / exhaust structure is focused, but in the second embodiment, fan control suitable for the application is performed in addition thereto. Since the structure of the electronic device 10 is the same as that of the first embodiment, the description thereof is omitted, and points that are not described in the first embodiment and different points are described.

  A control unit (not shown) that controls the fan 20 of the small transmitter 11 is provided with a determination unit that determines that the small transmitter 11 is connected to the output amplifier 12. Connection / non-connection determination is performed by a method in which, for example, a concave mechanical switch is provided on one side of both devices and a convex switch is provided on the other for connection detection, and the control unit detects that this switch has been pressed during connection. . Alternatively, it is possible to make a determination by exchanging signals with the small transmitter 11 when connected to the output amplifier 12.

A temperature sensor (not shown) is provided in both the small transmitter 11 and the output amplifier 12.
The temperature information of the output amplifying device 12 is transmitted to the control unit of the small transmitter 11 via the connector 14 of the connection unit. In the control unit, an allowable upper limit temperature at which both devices can normally operate is registered in advance.
(Description of operation)
First, the control unit determines whether the small transmitter 11 is connected to the output amplifying device 12. Next, the temperature acquisition and the upper and lower rotation speed limits of the cooling fan 20 are determined.

  As a result of the connection determination, the temperature of only the small transmitter 11 is acquired when not connected, and the temperature of the output amplifier 12 as well as the small transmitter 11 is acquired when connected. The upper and lower rotation speed values of the cooling fan 20 are also changed depending on the presence or absence of connection.

Next, the rotation speed of the cooling fan 20 is determined.
The rotational speed is changed within a range not exceeding the lower limit and the upper limit rotational speed from the obtained temperature information.

When the output amplifying device 12 is connected, it is thermally severer than when the small transmitter 11 is operated alone. For this reason, the lower limit rotation speed n _{2, min} and the upper limit rotation speed n _{2, max} of the fan at the time of connection are set higher than the lower limit rotation speed n _{1, min} and the upper limit rotation speed n _{1, max} during single operation _, respectively. n _{2, max} and n _{2, min} are specifications for fan speed at high load (when connected), and n _{1, max} and n _{1, min} are specifications for fan speed at low load (when not connected). The rotation speed of the fan 20 is changed within a range not exceeding the upper limit rotation speed and the lower limit rotation speed.

  A flowchart of fan control in this embodiment is shown in FIG.

  First, it is determined whether the small transmitter 11 and the output amplifier 12 are connected (S400). If it determines with having connected (S400Yes), the temperature of the small transmitter 11 and the output amplifier 12 will be measured, and it will be determined whether it is lower than each allowable temperature (S401).

  If it is determined that the temperature is lower than the allowable temperature (Yes in S401), the control unit sets a target rotational speed to be lowered. In this embodiment, it is assumed that the number of rotations is increased or decreased in steps of 500 rpm. For example, if the current rotation speed of the fan is 8000 rpm, the fan speed is reduced by 500 rpm and set to 7500 rpm.

When the set 7500 rpm is not smaller than the lower limit rotational speed n _{2 min} when the small transmitter 11 and the output amplifier 12 are connected (No in S402), the rotational speed is lowered to 7500 rpm. On the other hand, when 7500 rpm is smaller than the lower limit rotation speed n _{2, min} (S402 Yes), the lower limit rotation speed is not decreased (no operation is performed).

  If the control unit determines that the measured temperature is not lower than the allowable temperature (over the allowable temperature) (No in S401), the control unit sets a target rotational speed to be increased. For example, when the current rotation speed of the fan is 9000 rpm, the speed is increased by 500 rpm and set to 9500 rpm.

If the set 9500 rpm is not smaller than the upper limit number of rotations n _{2, max} (No in S403), the fan does not rotate beyond the upper limit number of rotations. Therefore, a high temperature warning is displayed. The high temperature warning is displayed by, for example, displaying an alarm on the display unit (FIG. 3 (b) front view) of the small transmitter 11 or blinking the lamp. Not only the display but also an alarm sound may be emitted.
On the other hand, when 9500 rpm is smaller than the upper limit number of rotations n _{2, max} (S403 Yes), the temperature of the device is lowered by increasing it to 9500 rpm as it is.

  If it is determined that the small transmitter 11 and the output amplifying device 12 are not combined (S400 No), the temperature of the small transmitter 11 is measured to determine whether it is lower than the allowable temperature (S404). If it is determined that the temperature is lower than the allowable temperature (S404 Yes), the control unit sets a target rotational speed to be lowered. For example, when the current rotation speed of the fan is 6000 rpm, the fan speed is reduced by 500 rpm and set to 5500 rpm.

When the set 5500 rpm is not smaller than the lower limit rotational speed n _{1, min} when only a small transmitter is used (No in S405), the rotational speed is lowered to 5500 rpm. On the other hand, when it is smaller than the lower limit rotational speed n _{1, min} (S405 Yes), it is not lowered below the lower limit rotational speed (no action is taken).

Further, if the set 5500 rpm is not smaller than the upper limit number of rotations n _{1, max} when only a small transmitter is used (No in S406), the fan cannot be rotated beyond the upper limit number of rotations, so that the temperature cannot be lowered any further. Then there is a risk of damage to the equipment. Therefore, a high temperature warning is displayed as in the case of S403 No. On the other hand, when 5500 rpm is smaller than the upper limit number of rotations n _{1, max} , the temperature of the apparatus is lowered by increasing it to 5500 rpm as it is.
(Explanation of effect)
According to this embodiment, in addition to the effects of the first embodiment, fan control suitable for the application can be performed. Specific effects are as follows.
(A) When the small transmitter 11 is connected to the output amplifier 12, the rotation speed of the fan 20 is changed not only by the temperature of the small transmitter 11 but also by the temperature of the output amplifier 12. As a result, it is possible to control the rotational speed of the fan in consideration of not only the small transmitter 11 but also the output amplifying device 12 as a whole.
(B) The upper and lower rotational speeds of the fan 20 are changed depending on whether or not the small transmitter 11 is connected to the output amplifier 12.
As a result, it is possible to use the fan at a reasonable fan speed that meets the required specifications.

  For example, when considering a radio relay transmission device (FPU) for television broadcasting, the small transmitter is connected to the back of the camera and used when the small transmitter is operating alone. Therefore, silent operation is required. On the other hand, when connected to the output amplifying device, it is not required to operate as quietly as when operating alone, but because it operates in a drip-proof cover that is sealed except for the intake and exhaust ports, it requires a higher cooling capacity than when operating alone. It becomes. If this embodiment is used, it becomes possible to change the upper limit and the lower limit rotational speed of the fan depending on whether or not the output amplifying device 12 is connected. For this reason, it is possible to set the upper limit number of rotations to be low during a single operation and perform an operation with an emphasis on silence, and to set the upper limit number of rotations to be high and perform an operation with an emphasis on cooling during a connection operation.

In addition, you may enable it to change to the constant value operation mode in an upper limit rotation speed.
By doing so, it is possible to obtain an effect of avoiding an unexpected change in the noise level or facilitating noise filtering because the frequency of noise caused by the fan becomes constant.

In the second embodiment, the cooling mechanism described in the first embodiment, that is, the electronic device 10 that reuses the air used for air cooling of the small transmitter 11 in the output amplifying device 12 again is used.
However, even when the present invention is used for temperature control when a device not using this cooling mechanism is combined into a single electronic device, it can be used at a reasonable fan speed that meets the required specifications. For example, when the temperature is low, the number of rotations of the fan need not be increased.

  Moreover, although Embodiment 1 and 2 demonstrated the case where a small transmitter and an output amplifier were connected, this invention is not restricted to this, It can apply to the electronic device which combines two apparatuses and becomes one apparatus.

A part or all of the above-described embodiment can be described as in the following supplementary notes, but is not limited thereto.
(Appendix 1) An electronic device that can combine a first device and a second device and includes a cooling mechanism,
The first device and the second device each have an intake port and an exhaust port, the first device includes a fan, and the second device exhausts air from the exhaust port of the first device. An electronic device comprising a cooling mechanism that sucks in the refrigerant at the air intake port and exhausts the sucked refrigerant into the exhaust port of the second device.
(Supplementary note 2) The first device and the second device are covered with a cover, an opening is provided in the cover, the intake air is sucked from the opening, and the sucked refrigerant is sucked into the intake port of the first device The electronic device provided with the cooling mechanism according to appendix 1, wherein the air is sucked by the air.
(Additional remark 3) Electronic equipment provided with the cooling mechanism according to Additional remark 1 or 2, wherein the exhaust port of the first device and the intake port of the second device are arranged close to each other.
(Supplementary note 4) Any one of Supplementary notes 1 to 3, wherein air sucked from an intake port of the first device flows through the first device and is exhausted by providing a fan at an exhaust port on the opposite side of the first device. An electronic device comprising the cooling mechanism according to claim 1.
(Appendix 5) The air flow path in the second device is provided separately from the heat generating component, and is thermally connected to the heat generating component. Electronic equipment equipped with a cooling mechanism.
(Supplementary note 6) Any one of Supplementary notes 1 to 5, wherein the opening of the cover and the position of the exhaust port of the second device are provided in a positional relationship between the first device and the second device. An electronic device comprising the cooling mechanism according to claim 1.
(Appendix 7) An electronic device that can combine a first device and the second device and includes a cooling fan,
Determining means for determining whether the first device and the second device are combined;
When it is determined that the combination is made by the determination unit, the temperatures of the first device and the second device are measured. When it is determined that the combination is not performed, the temperature of the first device is measured. Temperature measuring means to
Cooling fan control means for controlling the number of rotations of the cooling fan based on the temperature measured by the temperature measuring means;
Electronic equipment comprising.
(Supplementary Note 8) The cooling fan control means has an upper limit rotational speed and a lower limit rotational speed that limit the rotational speed of the fan, and is controlled in a range from the upper limit rotational speed to the lower limit rotational speed,
The upper limit rotation speed and the lower limit rotation speed of the cooling fan when the first device and the second device are combined are higher than the upper limit rotation speed and the lower limit rotation speed when not combined, respectively. An electronic apparatus comprising the cooling fan according to appendix 7.
(Supplementary Note 9) The cooling fan control means has an upper limit rotational speed and a lower limit rotational speed that limit the rotational speed of the fan, and is controlled in a range from the upper limit rotational speed to the lower limit rotational speed,
Appendix 7 or 8 is characterized in that the cooling fan control means controls the cooling fan according to the upper limit rotational speed and issues a high temperature warning when the rotational speed exceeding the upper limit rotational speed is targeted. Electronic equipment with a cooling fan.
(Supplementary note 10) The electronic device according to any one of supplementary notes 1 to 9, wherein the first device is a small transmitter, and the second device is an output amplifier.
(Supplementary Note 11) The cover is a drip-proof cover, and the gap between the first and second devices and the cover is sealed in a state where the first and second devices are assembled. The electronic device according to any one of the above.
(Supplementary note 12) The electronic device according to any one of supplementary notes 1 to 6, wherein the refrigerant is air.

The present invention can be used for a radio relay transmission apparatus (FPU) for television broadcasting.

DESCRIPTION OF SYMBOLS 10 Electronic device 11 Small transmitter 12 Output amplifier 12a Mount part of output amplifier 12b Flow path shape part 13 Drip-proof cover 14 Connector 15 Drip-proof cover inlet 16 Small transmitter inlet 17 Small transmitter outlet 18 Output amplification Device inlet 19 Output amplifier exhaust 20 Fan 25, 35 Positioning parts 40 Rectifier plate

Claims (9)

It is possible to combine a first device and a second device having a location that is higher than the exhaust temperature of the first device, and an electronic device including a cooling mechanism,
Each of the first device and the second device has an intake port and an exhaust port. The first device includes a fan, and is sucked from the intake port of the first device. the refrigerant that has cooled the devices is exhausted from the exhaust port, a cooling mechanism for the aforementioned air intake and exhaust refrigerant at the inlet of the second device, exhausting the intake refrigerant in the outlet of the second device Electronic equipment.   The first device and the second device are covered with a cover, the opening is provided in the cover, the air is sucked from the opening, and the sucked refrigerant is sucked at the air inlet of the first device. An electronic apparatus comprising the cooling mechanism according to claim 1.   The electronic device provided with the cooling mechanism according to claim 1 or 2, wherein an exhaust port of the first device and an intake port of the second device are arranged close to each other. The air that has air from the intake port of the first device to flow through the first device, any one of the claims 1-3, which is evacuated by providing a fan on the opposite side of the exhaust port of the first device Electronic equipment provided with the cooling mechanism according to the item.   The cooling mechanism according to any one of claims 1 to 4, wherein the air flow path in the second device is provided separately from the heat generating component and is thermally connected to the heat generating component. With electronic equipment. The cooling mechanism according to claim 2 , wherein the opening of the cover and the position of the exhaust port of the second device are provided in a positional relationship with the first device and the second device interposed therebetween. Electronic equipment. Determination means for determining whether said before and Symbol first device the second device are combined,
When it is determined that the combination is made by the determination unit, the temperatures of the first device and the second device are measured. When it is determined that the combination is not performed, the temperature of the first device is measured. Temperature measuring means to
Based on the temperature measured by said temperature measuring means, and fan control means that controls the rotational speed of the fan,
An electronic apparatus comprising the cooling mechanism according to any one of claims 1 to 6 . Before notated § emission control means, said has a maximum rotation speed and the lower limit rotation speed which limits the rotation speed of the fan is controlled in a range of the lower limit rotational speed from the maximum rotation speed,
Said upper limit rotation speed and lower limit rotation speed before notated § down when the first device and the second device are combined is higher respectively than the upper limit rotation speed and lower limit rotation speed when not combined An electronic apparatus comprising the cooling mechanism according to claim 7. Before notated § emission control means, said has a maximum rotation speed and the lower limit rotation speed which limits the rotation speed of the fan is controlled in a range of the lower limit rotational speed from the maximum rotation speed,
Before notated § emission control means, when the rotation speed exceeding the maximum rotation speed is a target, the upper limit rotational speed, and controls the fan or claim 7 which comprises carrying out the high temperature warning An electronic apparatus comprising the cooling mechanism according to 8.

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