JP2014207294A - Electrical equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide electrical equipment that can be kept warm in a cold district or in a cold season without adding a heater.SOLUTION: Electric equipment 1 has a heating component unit 11 housed in a housing 10. The housing 10 has a first ventilation port 21 arranged on one side face and a second ventilation port 22 arranged on the other side face. A shutter device 28 is provided in the second ventilation port 22. The first ventilation port 21 and the second ventilation port 22, a first fan 23 which faces the first ventilation port 21, and a second fan 30 which faces the second ventilation port 22 constitute a heat discharge device 20. When a temperature exceeds a predetermined value, the first fan 23 blows air to the first ventilation port 21 and the shutter device 28 is opened. When the temperature is equal to or lower than the predetermined value, the second fan 30 blows air to the second ventilation port 22, and the shutter device 28 is closed.

Description

  The present invention relates to electrical equipment.

  In many cases, an electric device is configured to store various components in a housing. Among the parts, parts that consume electric power generate heat. Parts that generate a large amount of heat may be referred to as “heat generating parts”. If there is a heat generating component in the housing, the temperature in the housing rises. Since the function of the electric device is adversely affected depending on the degree of the temperature rise, a heat exhaust device that normally discharges heat generated by the heat generating component to the outside of the housing is provided when the heat generating component exists in the housing. The heat exhausting device includes a fan, a heat pipe, a heat sink, and the like.

  FIG. 7 shows an example of a conventional structure of an electric device incorporating a heat generating component. The conventional electric device 100 is assumed to be a power conditioner, a power storage system, an electric vehicle charger, and the like that control solar power generation and wind power generation and sales. The electrical device 100 includes a housing 10 configured by combining metal parts and synthetic resin parts, and a heat generating component unit 11 including at least one heat generating component is accommodated in the housing 10. A heat radiating plate 12 is attached to the heat generating component unit 11. Although the heat sink 12 may be a steel plate, it is more preferable if it is made of a metal material having good heat conductivity such as aluminum. Although the heat sink 12 is drawn up from the upper surface of the heat generating component unit 11 like a fish dorsal fin, of course, it may be attached to the heat generating component unit 11 in a horizontal posture.

  Since the heat generating component unit 11 exists, the case 10 is provided with a heat exhaust device 20. The heat exhaust device 20 is composed of two ventilation openings and one fan. The two ventilation openings are a first ventilation opening 21 disposed on the upper left side surface of the housing 10 and a second ventilation opening 22 disposed on the upper right side surface of the housing 10 in FIG. 7. One fan is a fan 23 arranged inside the housing 10 so as to face the first ventilation port 21. The fan 23 has a propeller fan inside the casing, and this type of propeller fan is rotated by a motor.

  The first ventilation port 21 is configured by arranging a number of horizontal rectifying plates 25 in the vertical direction inside a frame 24. The second ventilation port 22 is configured by arranging a large number of horizontal rectifying plates 27 in the vertical direction inside a frame 26. The current plates 25 and 27 may be arranged vertically instead of horizontally. A horizontal rectifying plate and a vertical rectifying plate may be combined in a lattice shape. More simply, the first ventilation port 21 or the second ventilation port 22 may be configured by a plurality of small holes or slits formed on the side surface of the housing 10.

  A control board 13 is arranged in a vertical posture inside the housing 10. The control board 13 controls the entire electric device 100 including the heat generating component unit 11 and the fan 23. In some cases, the heat generating component unit 11 itself is a control board (motherboard), and the control board 13 is integrated with the heat generating component unit 11.

  When the electric device 100 is operated, heat is generated from the heat generating component unit 11. When the fan 23 is driven, the fan 23 discharges the air inside the housing 1 from the first vent 21 to the outside. Instead, external air enters the housing 1 from the second ventilation port 22. That is, the fan 23 generates an airflow that passes through the first ventilation port 21 and the second ventilation port 22. Due to the air exhausted from the first ventilation port 21 and the air flowing in from the second ventilation port 22, a cooling air flow that passes through the housing 1 while contacting the heat radiating plate 12 is generated. The heat generated from the heat generating component unit 11 is dissipated into the cooling air flow through the heat radiating plate 12, and the cooling air flow that has received the heat is discharged from the first ventilation port 21. Thereby, the heat generating component unit 11 is cooled.

  Electrical equipment may fail when placed in a cold region. For example, in the electric vehicle charging device described in Patent Document 1, there is a concern that the door freezes and does not open when the temperature falls below 0 ° C. In order to reduce such a concern, in the electric vehicle charging device of Patent Document 1, a heater is provided in the casing, and when the temperature falls below a predetermined threshold value, the heater is energized and the temperature of the casing does not drop too much. I am doing so.

JP 2012-109215 A

  When a mechanism for energizing the heater to prevent the temperature of the casing from being lowered is adopted, the power consumption of the heater is added to the original power consumption of the electric device, and the overall power consumption increases. When the power consumption increases, the running cost increases, and there is a problem of securing a power source capable of supplying such power.

  The present invention has been made in view of the above points, and an object of the present invention is to provide an electrical device that can keep the electrical device warm in a cold district or in a cold season without adding a heater.

  In order to achieve the above object, an electrical device according to the present invention includes a heat generating component and a heat exhaust device that discharges heat generated by the heat generating component to the outside of the housing, and the temperature becomes a predetermined value or less. The exhaust heat capacity of the exhaust heat device is reduced.

  According to this configuration, when the temperature falls below a predetermined value, the exhaust heat capacity of the exhaust heat device is intentionally reduced, and the heat generated by the heat generating components is trapped in the housing to prevent the temperature from falling. There is no need to provide it, and the power consumed by the heater can be saved. Since there is no need for a space for installing the heater, an increase in the size of the electrical equipment can be avoided.

  In the electrical apparatus having the above-described configuration, the heat exhaust device includes a vent formed in the housing and a fan that generates an airflow passing through the vent, and the vent includes an open / close mechanism, and the exhaust heat It is preferable that the exhaust heat capacity of the apparatus is reduced by reducing the opening of the vent.

  According to this configuration, the heat generated by the heat generating component can be reliably confined in the housing.

  In the electric apparatus having the above-described configuration, the heat exhaust device includes a vent formed in the housing and a fan that generates an airflow passing through the vent, and the heat exhaust capability reduction of the heat exhaust device is caused by rotation of the fan. It is preferably performed by a reduction in the number.

  According to this configuration, it is possible to prevent a decrease in the temperature of the casing and at the same time reduce the power consumption of the fan and the life of the fan.

  According to the configuration of the present invention, when the temperature falls below a predetermined value, the exhaust heat capacity of the exhaust heat device is intentionally reduced to trap the heat generated by the heat generating component in the housing, thereby preventing the temperature decrease. There is no need to provide a heater, and an increase in component costs can be prevented. Since there is no need for a space for installing the heater, an increase in the size of the electrical equipment can be avoided. In addition, since the electric power consumed by the heater is not required, the running cost does not increase.

It is a schematic block diagram of the electric equipment which concerns on 1st Embodiment of this invention. It is a schematic block diagram of the electric equipment which concerns on 1st Embodiment of this invention, and shows a normal driving | running state. It is a schematic block diagram of the electric equipment which concerns on 1st Embodiment of this invention, and shows the driving | running state at the time of low temperature. It is a schematic block diagram of the electric equipment which concerns on 2nd Embodiment of this invention, and shows a normal driving | running state. It is a schematic block diagram of the electric equipment which concerns on 2nd Embodiment of this invention, and shows the driving | running state at the time of low temperature. It is a schematic block diagram of the electric equipment which concerns on 3rd Embodiment of this invention, and shows the driving | running state at the time of low temperature. It is a schematic block diagram of the conventional electric equipment.

<First Embodiment>
The configuration of the electrical apparatus 1 according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 3. The electric device 1 is common in many respects to the conventional electric device 100 shown in FIG. Therefore, among the components of the electric device 1, components that are functionally common to the electric device 100 are denoted by the same reference numerals used in the description of the electric device 100, and description thereof is omitted. The same applies to the second and following embodiments.

  In the first embodiment, the two heat vents and the two fans constitute the heat exhaust device 20. The two ventilation openings are a first ventilation opening 21 and a second ventilation opening 22, and the two fans are first fans 23 (disposed inside the housing 10 so as to face the first ventilation opening 21 ( The “fan 23” in the electric device 100 is referred to herein as “first fan 23”) and the second fan 30 disposed inside the housing 10 so as to face the second ventilation port 22. Similarly to the first fan 23, the second fan 30 is of the type in which a propeller fan inside the casing is rotated by a motor.

  The structure of the second ventilation opening 22 is different from that of the electric device 100. That is, the second vent 22 is provided with an opening / closing mechanism. The opening / closing mechanism is configured by a shutter device 28 that allows inflow of air from the outside to the inside of the housing 10 but does not allow outflow of air from the inside of the housing 10 to the outside. The shutter device 28 is configured by arranging a plurality of shutter pieces 29 in the vertical direction inside the frame 26 of the second ventilation port 22, and each shutter piece 29 rotates in the vertical plane with the upper end as a fulcrum. The free end of each shutter piece 29 hits the upper end of the shutter piece 29 immediately below from the inside of the housing 10. The free end of the lowermost shutter piece 29 hits a stopper 26 a formed on the inner surface of the frame 26 from the inside of the housing 10. For this reason, when wind pressure is applied from the inside of the housing 10, the shutter device 28 is not opened. It should be noted that the structure of the shutter device 28 as shown in the drawing is merely an example, and does not limit the invention.

  The shutter device 28 is kept closed by the weight of the shutter piece 29. Since the shutter piece 29 rattles only with its own weight, a mechanism for maintaining the closed state with a spring may be adopted. The opening of the shutter device 28 may be based on a relative increase in external pressure generated by driving the first fan 23 or the second fan 30 or may be based on a power source such as a motor or a solenoid. When configured as an electric shutter using a power source such as a motor or solenoid, the shutter piece 29 can be moved electrically in the opening direction or in the closing direction. In the case where the electrical device 1 is installed outdoors, it is desirable to add waterproof packing or the like to the shutter device 28 to enhance the waterproof property.

  The control board 13 also controls opening and closing of the shutter device 28 when the shutter device 28 is electrically driven. The predetermined location of the housing 10 includes the temperature inside the housing 10, the temperature outside the housing 10, the temperature of the housing 10, the temperature of the heat generating component unit 11, or the temperature of the heat sink 12 (in the claims) A temperature measuring device (not shown) for measuring any one or some of these temperatures and the temperature is used as a generic term for the temperature and temperature, and the control board is based on the measurement result of the temperature measuring device. 13 performs control.

  If the temperature measured by the temperature measuring device (not shown) exceeds a predetermined value, the first fan 23 is driven when the electric device 1 is operated. The second fan 30 remains stopped. The first fan 23 blows air toward the first ventilation port 21 and discharges the air inside the housing 10 through the first ventilation port 21. At this time, as shown in FIG. 2, the shutter device 28 is opened, and external air flows into the housing 10. That is, the first fan 23 generates an airflow that passes through the first ventilation port 21 and the second ventilation port 22. As a result, a cooling air flow that passes through the housing 1 while contacting the heat radiating plate 12 is generated. The heat generated from the heat generating component unit 11 is dissipated into the cooling air flow through the heat radiating plate 12, and the cooling air flow that has received the heat is discharged from the first ventilation port 21. In this way, the heat generating component unit 11 is cooled.

  When the shutter device 28 is not electrically operated, the shutter device 28 is opened by a relative increase in the external atmospheric pressure due to a decrease in the atmospheric pressure in the housing 10 due to the air in the housing 10 being discharged from the first ventilation port 21. In the case of the electric type, the shutter device 28 is opened by a power source such as a motor or a solenoid.

  When the temperature measured by the temperature measuring device (not shown) becomes a predetermined value, for example, −5 ° C. or lower, the exhaust heat capability of the exhaust heat device 20 is lowered. In the first embodiment, the exhaust heat capacity of the heat exhaust device 20 is reduced by reducing the opening of the second ventilation port 22. As shown in FIG. 3, the opening reduction of the second ventilation port 22 is achieved by closing the shutter device 28 that is an opening / closing mechanism. When the driving of the first fan 23 is stopped, the shutter device 28 is placed in a closed state by gravity, urging by a spring, or driving by a power source (in the case of an electric type).

Here, the first fan 23 stops and the second fan 30 is driven instead. The second fan 30 blows air toward the second ventilation port 22. If the shutter device 28 is open, an air flow that passes through the second ventilation port 22 is generated. However, since the shutter device 28 is closed, the air flow must find a path in the inner direction of the housing 10. Disappear. For this reason, as shown by the arrow in FIG. Since the circulating airflow does not carry heat to the outside of the housing 10, the temperature inside the housing 10 rises. Thereby, even if it does not use a heater, the temperature fall of the housing | casing 10 can be prevented and the normal operation | movement of the electric equipment 1 can be ensured. Since a circulating airflow is generated inside the housing 10, heat is evenly distributed and temperature unevenness is unlikely to occur.

  As described above, when the temperature becomes a predetermined value or less, the heat exhausting ability of the heat exhausting device 20 is intentionally reduced, and the heat generated by the heat generating component unit 11 is confined in the housing 10 to prevent the temperature decrease. Therefore, it is not necessary to provide a separate heater, and an increase in component costs can be prevented. Since the space required for installing the heater is unnecessary, an increase in the size of the electric device 1 can be avoided. The power consumed by the heater can also be saved. In addition, since the reduction of the exhaust heat capability of the exhaust heat device 20 is performed by reducing the opening degree of the second ventilation port 22, the heat generated by the heat generating component unit 11 can be reliably confined in the housing 10.

Second Embodiment
Then, the structure of the electric equipment 1 which concerns on 2nd Embodiment of this invention is demonstrated based on FIG. 4 and FIG. The second embodiment differs from the first embodiment in the following points. That is, the second fan is omitted from the first embodiment, and only the fan 23 that was the first fan in the first embodiment is left. An electric shutter device 28 is provided inside the first ventilation port 21, and a stopper 24 a is formed on the inner surface of the frame 24. Each shutter piece 29 constituting the shutter device 28 rotates in the vertical plane with the upper end as a fulcrum, and the free end of each shutter piece 29 hits the upper end of the shutter piece 29 directly below from the inside of the housing 10. The free end of the lowermost shutter piece 29 hits the stopper 24 a from the inside of the housing 10. For this reason, when wind pressure is applied from the inside of the housing 10, the shutter device 28 is not opened. The second ventilation port 22 has the same structure as the second ventilation port 22 of the conventional electric device 100.

  If the temperature measured by a temperature measuring device (not shown) exceeds a predetermined value, when the electric device 1 is operated, the shutter device 28 is opened and the fan 23 is driven as shown in FIG. The fan 23 blows air toward the first ventilation port 21 and discharges the air inside the housing 10 through the first ventilation port 21. At the same time, external air flows into the housing 10 from the second ventilation port 22. That is, the first fan 23 generates an airflow that passes through the first ventilation port 21 and the second ventilation port 22. As a result, a cooling air flow that passes through the housing 1 while contacting the heat radiating plate 12 is generated. The heat generated from the heat generating component unit 11 is dissipated into the cooling air flow through the heat radiating plate 12, and the cooling air flow that has received the heat is discharged from the first ventilation port 21. In this way, the heat generating component unit 11 is cooled.

  When the temperature measured by a temperature measuring device (not shown) becomes a predetermined value or less, the heat exhaust capability of the heat exhaust device 20 is reduced. In the second embodiment, the reduction of the exhaust heat capability of the exhaust heat device 20 is achieved by reducing the opening degree of the first ventilation port 21. As shown in FIG. 5, the opening reduction of the first ventilation port 21 is performed by closing the shutter device 28 that is an opening / closing mechanism.

  When the fan 23 is driven in a state where the shutter device 28 is in the closed state, the air flow blown out from the fan 23 must find a course in the inner direction of the housing 10. For this reason, as shown in FIG. 5, a circulating airflow is generated inside the housing 10. Since the circulating airflow does not carry heat to the outside of the housing 10, the temperature inside the housing 10 rises. Thereby, even if it does not use a heater, the temperature fall of the housing | casing 10 can be prevented and the normal operation | movement of the electric equipment 1 can be ensured. Since a circulating airflow is generated inside the housing 10, heat is evenly distributed and temperature unevenness is unlikely to occur.

  As described above, when the temperature becomes a predetermined value or less, the heat exhausting ability of the heat exhausting device 20 is intentionally reduced, and the heat generated by the heat generating component unit 11 is confined in the housing 10 to prevent the temperature decrease. Therefore, it is not necessary to provide a separate heater, and an increase in component costs can be prevented. Since the space required for installing the heater is unnecessary, an increase in the size of the electric device 1 can be avoided. The power consumed by the heater can also be saved. In addition, since the reduction of the exhaust heat capacity of the exhaust heat device 20 is performed by reducing the opening degree of the first vent 21, the heat generated by the heat generating component unit 11 can be reliably confined in the housing 10.

<Third Embodiment>
Then, the structure of the electric equipment 1 which concerns on 3rd Embodiment of this invention is demonstrated based on FIG. The electrical device 1 of the third embodiment has the same structure as the conventional electrical device 100.

  If the temperature measured by a temperature measuring device (not shown) exceeds a predetermined value, the fan 23 is driven when the electric device 1 is operated. The fan 23 blows air toward the first ventilation port 21 and discharges the air inside the housing 10 through the first ventilation port 21. At the same time, external air flows into the housing 10 from the second ventilation port 22. That is, the first fan 23 generates an airflow that passes through the first ventilation port 21 and the second ventilation port 22. As a result, a cooling air flow that passes through the housing 1 while contacting the heat radiating plate 12 is generated. The heat generated from the heat generating component unit 11 is dissipated into the cooling air flow through the heat radiating plate 12, and the cooling air flow that has received the heat is discharged from the first ventilation port 21. In this way, the heat generating component unit 11 is cooled.

When the temperature measured by a temperature measuring device (not shown) becomes a predetermined value or less, the heat exhaust capability of the heat exhaust device 20 is reduced. In the third embodiment, the reduction of the exhaust heat capability of the exhaust heat device 20 is achieved by reducing (including stopping) the rotational speed of the fan 23.
If the number of rotations of the fan 23 is sufficiently reduced and the amount of air blown out from the first ventilation port 21 is reduced to a minimum, heat is not taken out of the housing 10, so that the temperature inside the housing 10 rises. To do. Thereby, even if it does not use a heater, the temperature fall of the housing | casing 10 can be prevented and the normal operation | movement of the electric equipment 1 can be ensured.

  As described above, when the temperature becomes a predetermined value or less, the heat exhausting ability of the heat exhausting device 20 is intentionally reduced, and the heat generated by the heat generating component unit 11 is confined in the housing 10 to prevent the temperature decrease. Therefore, it is not necessary to provide a separate heater, and an increase in component costs can be prevented. Since the space required for installing the heater is unnecessary, an increase in the size of the electric device 1 can be avoided. The power consumed by the heater can also be saved. Further, since the reduction of the exhaust heat capability of the heat exhaust device 20 is performed by the reduction of the rotation speed of the fan 23, the power consumption of the fan 23 and the life reduction of the fan 23 can be reduced.

<Others>
In the first and second embodiments, the shutter device 28 does not necessarily have to be completely closed. It may be closed so that the air leaks somewhat. In addition, as can be said for all the embodiments, the shutter device 28 may be provided in both the first ventilation port 21 and the second ventilation port 22 so that the enclosure 10 is fully closed.

  Although the embodiments of the present invention have been described above, the scope of the present invention is not limited to these embodiments, and various modifications can be made without departing from the spirit of the invention.

  The present invention can be widely used for electric devices incorporating heat-generating components.

DESCRIPTION OF SYMBOLS 1 Electric equipment 10 Housing | casing 11 Heat-emitting component unit 12 Heat sink 13 Control board 20 Heat exhaust device 21 1st ventilation port 22 2nd ventilation port 23 Fan (1st fan)
28 Shutter device 30 Second fan

Claims (3)

In the electrical equipment including a heat generating component and a heat exhaust device that discharges heat generated by the heat generating component to the outside of the housing in the housing,
When the temperature becomes a predetermined value or less, the exhaust heat capacity of the exhaust heat device is reduced.   The exhaust heat device includes a ventilation port formed in the housing and a fan that generates an airflow passing through the ventilation port. The ventilation port is provided with an opening / closing mechanism, and the exhaust heat capacity of the exhaust heat device is reduced. The electrical apparatus according to claim 1, wherein the electrical apparatus is performed by reducing the opening of the ventilation opening.   The exhaust heat device includes a ventilation hole formed in the housing and a fan that generates an airflow passing through the ventilation port, and the reduction of the exhaust heat capacity of the exhaust heat device is performed by a decrease in the rotation speed of the fan. The electrical apparatus according to claim 1, wherein:

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