JP2014157937A - Heat dissipation structure and heat dissipation control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat dissipation structure of easy maintenance capable of enhancing reliability and availability when dissipating heat by using a fan, and to provide a heat dissipation method.SOLUTION: A heat dissipation structure 1 includes a housing 10 having a first heat dissipation fan 51 and a second heat dissipation fan 52, and a shutter 30 configured to cover one of the first heat dissipation fan 51 and second heat dissipation fan 52. Out of the first heat dissipation fan 51 and second heat dissipation fan 52, the heat dissipation fan covered with the shutter 30 and the heat dissipation fan not covered with the shutter 30 can be switched according to the displacement of the shutter 30.

Description

  The present invention relates to a heat dissipation structure and a heat dissipation control method. More specifically, the present invention relates to a heat dissipation structure that releases heat, for example, inside a housing including a heating element to the outside using a fan, and a heat dissipation control method in such a heat dissipation structure.

  Various electronic devices or devices may contain electronic components that generate heat, and if heat generated by such components accumulates, the electronic components may go out of control or break down. May occur. Therefore, it is known that heat is released (radiated) to the outside using a fan so that heat generated by the heating element does not accumulate inside.

  For example, a power conversion device that converts DC power generated by sunlight into AC power has been proposed (see, for example, cited document 1). In such a power conversion device, a part of electric energy is converted into heat during operation. It is converted and generates heat inside the housing. For this reason, there are known devices that use a fan to dissipate heat inside the housing to the outside so that heat does not accumulate in the apparatus.

  Also, when storing precision electronic parts inside the housing, the cooling method by sucking air from the air inlet and blowing it to the internal electronic parts will also suck in dust and dust inside the housing. Therefore, it is not desirable. In such a case, the internal heat can be radiated to the outside by providing an air discharge port in the housing and discharging the air inside the housing to the outside using a fan.

  In such a heat dissipation structure using a heat-dissipating fan, the reliability and availability of the equipment is improved by preventing failure or malfunction as much as possible, and even if a malfunction or malfunction occurs, maintenance is easy. Things are desired.

  Therefore, in order to extend the life of the entire heat dissipation structure, it is known that a plurality of heat dissipation fans are installed and the number of fans to be driven is variably controlled according to the temperature to be cooled. By controlling in this way, not all fans are driven all the time, but a part of the fans can be put into a dormant state, so that it is expected to extend the life of the plurality of fans as a whole.

JP 11-318042 A

  However, in the configuration having a plurality of heat dissipating fans as described above, when some of the fans are in a resting state, outside air can enter the inside from the opening of the resting fan. In particular, when the air inside the housing is exhausted to the outside by driving the heat radiating fan, the inside of the housing becomes negative pressure, so if there is a resting fan, outside air will be discharged from the opening of the fan. Easily inhaled inside. For this reason, when the air containing heat exhausted from the exhaust port by driving the fan enters from the opening of the fan in the resting state, the hot air released to the outside is once again sucked into the inside, and the heat dissipation efficiency Is significantly reduced. When the efficiency of heat dissipation in the housing is reduced, the reliability and availability of the electronic devices and the like inside the housing are reduced.

  Further, when some fans are in a resting state, outside air enters the inside through the opening, and thus there is a possibility that unnecessary dust such as dust or dust may be inhaled from the outside. When unnecessary dust or the like enters inside the housing in this way, not only does it adversely affect the internal electronic devices, but also when dust or the like accumulates on the drive unit of the fan in a dormant state, It can cause problems. If the driving of the fan is hindered, it becomes a factor of reducing the reliability and availability of the entire heat dissipation structure.

  Furthermore, for example, when a problem occurs in driving of the heat dissipation fan or the heat dissipation fan breaks down, it is necessary to replace such a heat dissipation fan. Such replacement work is often difficult for a general user. Moreover, when the heat dissipating fan cannot be driven, the function as the heat dissipating structure cannot be sufficiently achieved.

  Accordingly, an object of the present invention is to provide a heat dissipation structure and a heat dissipation control method that can improve reliability and availability when performing heat dissipation using a fan, and are easy to maintain.

The invention of the heat dissipation structure according to the first aspect to achieve the above object is as follows:
A housing having a first heat dissipation fan and a second heat dissipation fan;
A shutter configured to cover one of the first heat dissipation fan and the second heat dissipation fan;
With
According to the displacement of the shutter, the first heat radiating fan and the second heat radiating fan can be switched between a heat radiating fan covered by the shutter and a heat radiating fan not covered. .

  The shutter may be configured to cover one of the first heat radiating fan and the second heat radiating fan by being displaced by sliding movement.

  The shutter may be configured to cover both sides of one of the first heat radiating fan and the second heat radiating fan.

  In addition, the exhaust ports of the first and second radiating fans may be arranged side by side along the direction in which the shutter is displaced.

  In addition, the exhaust ports of the first heat dissipation fan and the second heat dissipation fan may be arranged in a vertical direction.

  Moreover, you may provide the heat dissipation fan arrange | positioned above among the said 1st heat dissipation fan and said 2nd heat dissipation fan as a reserve of the heat dissipation fan arrange | positioned below.

  Moreover, you may provide a dust pocket or the recessed part for waste_water | drain below what is arrange | positioned below among the said 1st thermal radiation fan and the said 2nd thermal radiation fan.

  Moreover, according to the malfunction of the said 1st thermal radiation fan and the said 2nd thermal radiation fan, while controlling the drive of the said thermal radiation fan, you may have a control part which controls the displacement of the said shutter.

  Moreover, according to the period until the lifetime of a said 1st thermal radiation fan and a said 2nd thermal radiation fan, while controlling the drive of the said thermal radiation fan, you may have a control part which controls the displacement of the said shutter.

  In addition, the controller that controls the driving of the heat dissipation fan and the displacement of the shutter according to a period during which the state where the first heat dissipation fan and the second heat dissipation fan are not driven continues. You may have.

Furthermore, the invention of the heat dissipation control method according to the second aspect of achieving the above object is as follows:
A first heat radiating fan and a second heat radiating fan are arranged side by side and provided with a shutter configured to cover one of the first heat radiating fan and the second heat radiating fan, and according to the displacement of the shutter A heat dissipation control method of a heat dissipation structure that enables switching between a heat dissipation fan covered by the shutter and a heat dissipation fan not covered among the first heat dissipation fan and the second heat dissipation fan,
Driving the other of the first heat dissipation fan and the second heat dissipation fan with the shutter covering one of the first heat dissipation fan and the second heat dissipation fan;
Detecting the state of the other radiating fan;
According to the state of the other heat dissipation fan, displacing the shutter to cover the other heat dissipation fan;
Driving the one heat dissipation fan;
It is what has.

  ADVANTAGE OF THE INVENTION According to this invention, when performing heat dissipation using a fan, reliability and availability can be improved and the heat dissipation structure and heat dissipation control method with easy maintenance can be provided.

1 is an external perspective view schematically showing a heat dissipation structure according to an embodiment of the present invention. It is an external appearance perspective view which shows the state which removed the fan cover of the thermal radiation structure shown in FIG. It is an external appearance perspective view which shows the state which displaced the shutter of the thermal radiation structure shown in FIG. It is an external appearance perspective view which expands and shows the state in the middle of displacing the shutter of the thermal radiation structure shown in FIG. It is an external appearance perspective view which shows the thermal radiation structure shown in FIG. 3 from another angle. FIG. 6 is an external perspective view showing the heat dissipation structure shown in FIG. It is a functional block diagram which shows the example of the structure which controls the thermal radiation structure shown in FIG. It is a flowchart explaining the example of the process which concerns on the automatic control of the thermal radiation structure shown in FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is an external perspective view schematically showing a heat dissipation structure according to an embodiment of the present invention.

  As shown in FIG. 1, the heat dissipation structure 1 according to the embodiment of the present invention includes a housing 10 and a fan cover 20 in appearance.

  As will be described later, the housing 10 includes a heat radiating fin as an internal structure, and is configured such that heat from an electronic component that generates heat is conducted to the heat radiating fin. Here, a heating element such as an electronic component that generates heat (hereinafter simply referred to as a “heating element”) may be configured to be housed inside the housing 10 or may be installed outside the housing 10. You may comprise so that a heat | fever may be conducted inside the housing | casing 10. FIG. In the example illustrated below, a description will be given of a configuration in which the heat dissipation fin is partially disposed inside the housing 10 and the heating element is disposed in a portion other than the heat radiation fin inside the housing 10. However, the heating element may be accommodated inside the housing 10 without disposing the heat radiation fins inside the housing 10. The housing 10 can be made of any material having a strength sufficient to protect the components housed therein, such as metal or plastic.

  The fan cover 20 is arrange | positioned so that an internal thermal radiation fan may be covered so that it may show later. In addition, although the heat radiating structure 1 which concerns on embodiment of this invention is equipped with two or more heat radiating fans, in the following examples, the case where there are two heat radiating fans is demonstrated. The fan cover 20 is preferably configured so that the position covering the exhaust port of the heat dissipating fan becomes a slit shape or a mesh shape so as not to prevent the heat dissipating fan from exhausting the internal air. The fan cover 20 protects the internal heat radiating fan and prevents an external person from touching the heat radiating fan with a finger or the like to be injured. As shown in FIG. 1, the left side surface of the fan cover 20 is provided with a shutter slide knob for switching the exhaust port of the heat radiating fan. The shutter and slide knob will be described later. The fan cover 20 can also be made of any material having a strength sufficient to cover the fan, such as metal or plastic.

  FIG. 2 is an external perspective view showing a state where the fan cover 20 of the heat dissipation structure 1 shown in FIG. 1 is removed.

  As shown in FIG. 2, in a state in which the fan cover 20 is removed from the heat dissipation structure 1, the heat dissipation structure 1 includes a shutter 30, a slide knob 40, and a lower heat dissipation fan 51 in appearance. Further, the heat dissipation structure 1 includes heat dissipation fins 60 and bent portions 70 on the back side of the shutter 30 and the lower heat dissipation fan 51.

  The shutter 30 is configured to cover at least one of the plurality of heat dissipation fans. The shutter 30 can be made of any material having strength for protecting the fan, such as metal or plastic.

  The shutter 30 can be displaced by sliding in the vertical direction (Z-axis direction shown in FIG. 2) in FIG. By displacing in this way, the shutter 30 is configured to cover at least one of the plurality of heat dissipation fans and not to cover the heat dissipation fans other than the at least one covered heat dissipation fan.

  In FIG. 2, a lower heat radiating fan 51 is disposed below the shutter 30. The lower heat radiating fan 51 radiates the heat inside the housing 10 to the outside by discharging the air inside so that heat does not accumulate inside the housing 10. Since the lower heat radiating fan 51 can be configured by any of various types of fans, a more detailed description is omitted. In FIG. 2, illustrations such as rotating blades of the lower radiating fan 51 are omitted. An upper heat radiating fan 52 is disposed on the back side of the shutter 30, but is covered with the shutter 30 in FIG. 2 and cannot be seen from the outside. That is, in the heat dissipation structure 1 shown in FIG. 2, two heat dissipation fans, that is, a lower heat dissipation fan 51 and an upper heat dissipation fan 52 are installed.

  FIG. 3 is an external perspective view showing a state in which the shutter 30 of the heat dissipation structure 1 shown in FIG. 2 is displaced downward. When the shutter 30 is displaced by sliding the shutter 30 downward from the state shown in FIG. 2, the state shown in FIG. 3 is obtained. In FIG. 2, the upper radiating fan 52 is covered with the shutter 30 and the lower radiating fan 51 is exposed. On the other hand, in FIG. 3, the lower radiating fan 51 is covered with the shutter 30, and the upper radiating fan 52 is exposed.

  As shown in FIG. 1, a slit-like gap is formed in the fan cover 20 so that the shutter 30 can be slid from the outside even when the fan cover 20 is attached to the housing 10. It is desirable to be able to operate the knob 40.

  As described above, the heat dissipation structure 1 according to the present embodiment includes the housing 10 having the lower heat dissipation fan 51 and the upper heat dissipation fan 52, and the shutter 30 configured to cover one of the heat dissipation fans. ing. In addition, the heat dissipation structure 1 according to the present embodiment can switch between the heat dissipation fan covered by the shutter 30 and the heat dissipation fan not covered among the lower heat dissipation fan 51 and the upper heat dissipation fan 52 according to the displacement of the shutter 30. Configure. Here, the shutter 30 is preferably configured to cover one of the lower radiating fan 51 and the upper radiating fan 52 by being displaced by sliding movement. Further, in the present embodiment, it is preferable that the exhaust ports of the lower radiating fan 51 and the upper radiating fan 52 are arranged side by side along the direction in which the shutter 30 is displaced.

  FIG. 4 is an external perspective view showing an enlarged state in the middle of displacing the shutter 30 of the heat dissipation structure 1 shown in FIG. 3.

  FIG. 4 shows a state in which the shutter 30 that has been displaced downward is slightly slid upward. The shutter 30 preferably has a function of blocking the ventilation of one of the lower radiating fan 51 or the upper radiating fan 52 and protecting the one radiating fan. Therefore, for example, the shutter 30 is configured to cover at least one of the intake port 51A and the exhaust port 51B of the lower radiating fan 51 shown in FIG. 4, and preferably on both sides of the intake port 51A and the exhaust port 51B. It is preferable that the cover is covered. In other words, in the present embodiment, it is preferable that the shutter 30 is configured to cover both the intake and exhaust ports of one of the lower radiating fan 51 and the upper radiating fan 52.

  With such a configuration, the heat dissipation structure 1 according to the present embodiment displaces the shutter 30 up and down, and among the lower heat dissipation fan 51 and the upper heat dissipation fan 52, the heat dissipation fan covered with the shutter 30 and the shutter 30. It is possible to switch between a heat dissipation fan that is not covered. Of the lower radiating fan 51 and the upper radiating fan 52, the one covered by the shutter 30 is blocked from ventilation by the shutter 30, and the radiating fan is protected from dust and dirt by the shutter 30. In addition, the lower heat radiating fan 51 and the upper heat radiating fan 52 that are not covered by the shutter 30 can dissipate the housing 10 because the ventilation by the heat radiating fan is not blocked. Therefore, the shutter 30 can be displaced up and down, and the driven heat radiating fan of the lower radiating fan 51 and the upper radiating fan 52 can be ventilated while the non-driven radiating fan can be protected.

  As shown in FIGS. 2 to 4, heat radiating fins 60 are formed on the air inlet 51 </ b> A side of the lower heat radiating fan 51 in the housing 10 according to the present embodiment. The radiating fin 60 is formed with a large number of gaps in the lateral direction (X-axis and Y-axis directions shown in FIGS. 2 and 3) inside the housing 10, and is a region for releasing heat inside the housing 10. The surface area is increased. With such a configuration, heat conducted to the housing 10 is released from the heat radiating fins 60 inside the housing 10, and is radiated to the outside from the driven fan among the lower heat radiating fan 51 and the upper heat radiating fan 52. .

  That is, as shown in FIG. 2, when the lower radiating fan 51 is driven, the space formed between the lower radiating fan 51, the upper radiating fan 52, and the radiating fins 60 is decompressed. Hereinafter, this space is referred to as a “negative pressure chamber 90” (see FIG. 4). Since the entire negative pressure chamber 90 is depressurized, hot air can flow through the slit-like portions of the radiating fin 60, and hot air is sucked from the radiating fin 60 into the intake port 51 </ b> A of the lower radiating fan 51. The heating element that conducts heat to the radiating fins 60 can be cooled.

  As described above, according to the heat dissipating structure 1 according to the present embodiment, the outside air that has not been driven is covered with the shutter 30 so that the outside air passes through the heat dissipating fan in the inactive state. Intrusion is prevented. For this reason, the hot air once discharged to the outside from the driving heat radiating fan is not sucked into the inside again, and the efficiency of heat dissipation is not reduced. Therefore, it is possible to improve the reliability and availability of an electronic device or the like inside the housing.

  In addition, according to the heat dissipation structure 1 according to the present embodiment, dust or dust, etc., is externally applied to the heat-dissipating fan in the inactive state by covering the inactive heat-dissipating fan with the shutter 30. It is possible to prevent inhalation of unnecessary garbage and the like. That is, as shown in FIG. 2, since the upper heat radiating fan 52 was originally covered with the shutter 30, it was not exposed to dust or sand dust until the shutter 30 was slid downward, and stable operation was possible. Become. Accordingly, not only does the internal electronic device not be adversely affected, but also there is no possibility of a problem occurring when dust or the like accumulates on the heat-dissipating fan in a dormant state to drive the fan. Therefore, the reliability and availability of the entire heat dissipation structure can be improved.

  Furthermore, according to the heat dissipation structure 1 according to the present embodiment, for example, when a malfunction occurs in the driving heat dissipation fan or the driving heat dissipation fan fails, the slide knob 40 is simply slid. The heat dissipation fan to be driven can be switched. Such a switching operation can be performed very easily for a general user. That is, when the lower heat radiating fan 51 reaches the end of its life or breaks down, the user slides the slide knob 40 shown in FIG. You can switch to Therefore, the state in which the heat dissipating fan cannot be driven can be remarkably shortened, and the function as the heat dissipating structure can be sufficiently achieved.

  In addition, when the lower heat radiating fan 51 is driven, if the fan reaches the end of its life or fails, for example, a message to that effect is displayed on the display unit of the apparatus or an alarm sound is notified to the user. It is preferable to stop driving the lower heat radiating fan 51. Here, the lifetime of the lower heat radiating fan 51 can be determined based on, for example, the operating time of the heat radiating fan. Further, the failure of the lower radiating fan 51 can be detected by mounting a lock sensor on the radiating fan, for example.

  Next, in the heat dissipation structure 1 according to the present embodiment, a configuration that can deal with dust or dust entering from the outside and can further increase the period during which the heat dissipation fan can be stably driven will be described.

  When the heat dissipation structure 1 according to this embodiment is installed outdoors, for example, there is a concern that dust or dust may enter from the outside even if the lower heat dissipation fan 51 or the upper heat dissipation fan 52 is in an exhaust state. Therefore, in the heat dissipation structure 1 according to the present embodiment, as shown in FIGS. 2 and 3, the exhaust ports of the lower heat dissipation fan 51 and the upper heat dissipation fan 52 are arranged side by side in the vertical direction (Z-axis direction shown in the figure). It is preferable to do so. That is, in the heat dissipation structure 1 according to the present embodiment, it is preferable that the lower heat dissipation fan 51 and the upper heat dissipation fan 52 are continuously arranged in the vertical direction. In this case, in the heat dissipation structure 1 according to the present embodiment, it is preferable to provide the upper heat dissipation fan 52 as a spare for the lower heat dissipation fan 51.

  With such a configuration, as shown in FIG. 4, the bottom of the negative pressure chamber 90 can be formed at a position lower than the lower heat radiating fan 51, and dust or dust can be accumulated in the bottom. Even if dust or dust accumulates at the bottom of the negative pressure chamber 90 and reaches the position of the lower heat radiating fan 51, the dust or dust is exposed to the outside due to the wind pressure of the driven lower heat radiating fan 51. Discharged. On the other hand, when the lower heat radiating fan 51 is used as a spare and is driven from the upper heat radiating fan 52 to start using, dust or dust accumulates at the bottom of the negative pressure chamber 90 and reaches the position of the lower heat radiating fan 51. It is assumed that In this case, when the upper radiating fan 52 reaches the end of its life and the shutter 30 is moved upward, dust or dust accumulated up to the position of the lower radiating fan 51 enters the lower radiating fan 51. There is a concern that it will adversely affect the heat dissipation and the efficiency of heat dissipation will deteriorate.

  Thus, according to the heat dissipation structure 1 according to the present embodiment, even if dust or dust enters when installed outdoors, the period during which the heat dissipation fan can be driven stably can be further extended.

  Next, in the heat dissipation structure 1 according to the present embodiment, a configuration that can cope with moisture such as rain entering from the outside and can further increase the period during which the heat dissipation fan can be stably driven will be described.

  When the heat radiating structure 1 according to the present embodiment is installed outdoors, for example, even if the lower heat radiating fan 51 or the upper heat radiating fan 52 is in an exhausted state, not only from the heat radiating fan but also from other parts of the housing 10 and the like. For example, there is a concern that moisture such as rainwater may enter. Therefore, in the heat dissipation structure 1 according to this embodiment, it is preferable to provide the bent portion 70 at the bottom of the negative pressure chamber 90 described above. Furthermore, it is desirable to form a drain hole 80 penetrating outside the casing 10 of the heat dissipation structure 1 on the bottom surface of the bent portion 70. That is, in the heat dissipation structure 1 according to this embodiment, it is preferable to provide a dust reservoir or a drainage recess below the lower heat dissipation fan 51.

  By forming the drain hole 80, moisture such as rainwater entering from the heat radiating fan or other parts of the housing 10 can be discharged. Further, by forming the drain hole 80, dust or dust accumulated in the negative pressure chamber 90 can be discharged to some extent. If the drain hole 80 is formed in a part of the negative pressure chamber 90, the effect of decompression in the negative pressure chamber 90 may be reduced, and the heat dissipation efficiency as the heat dissipation structure 1 may be deteriorated. However, by providing the bent portion 70, the resistance of the air flowing into the negative pressure chamber 90 through the drain hole 80 can be increased, so that depressurization in the negative pressure chamber 90 is not greatly hindered. By adjusting the interval between the plate-like members constituting the bent portion 70, the resistance of air flowing into the negative pressure chamber 90 through the drain hole 80 can be adjusted. Further, the interval between the plate-like members constituting the bent portion 70 may be configured to be mechanically adjustable, or the size of the drain hole 80 may be configured to be mechanically adjustable.

  As described above, according to the heat dissipation structure 1 according to the present embodiment, even if moisture such as rain enters from the outside of the housing 10 installed outdoors, the period during which the heat dissipation fan can be stably driven is further extended. Can do.

  Next, an example of installation of a heating element in the heat dissipation structure 1 according to this embodiment will be described.

  FIG. 5 is an external perspective view showing the heat dissipation structure 1 shown in FIG. 3 from another angle. As shown in FIG. 5, the heat dissipating structure 1 according to the present embodiment is provided with a heating member arrangement region 12 on one side surface of the housing 10. For example, a printed circuit board including a heating element can be installed in the heating member arrangement region 12. Components that require a heat sink for heat dissipation, such as FETs and diodes, can be fixed in close contact with the heat generating member arrangement region 12 in consideration of insulation and the like. In addition, a printed board on which these electronic components are mounted can also be installed on the heat generating member arrangement region 12. At this time, it is desirable to use heat radiation grease or the like as necessary. Furthermore, if various parts are installed in the heat generating member arrangement area 12 and then a cover is attached to the heat generating member arrangement area 12, not only the appearance aesthetics of the structure integrated with the housing 10 is increased but also the heat generating member arrangement. Various components installed on the region 12 can also be protected.

  Such a heating element can be installed in the heating member arrangement region 12, and heat generated by the heating element can be conducted to the radiation fins 60 arranged on the back side of the heating member arrangement region 12. Note that, as described above, the heating element can be configured to be housed inside the housing 10 of the heat dissipation structure 1.

  Next, an example of control related to switching of the heat dissipation fan in the heat dissipation structure 1 according to the present embodiment will be described.

  In the heat dissipation structure 1, when switching the heat dissipation fan to be driven, for example, a switch is installed in each of the lower heat dissipation fan 51 and the upper heat dissipation fan 52, and the user heats the heat dissipation fan after sliding the shutter 30. You can also switch on. On the other hand, in the heat dissipation structure 1 according to the present embodiment, the driving fan among the lower heat dissipation fan 51 and the upper heat dissipation fan 52 can be selected according to the slide of the shutter 30. In this case, it is desirable to install a shutter sensor that detects whether the shutter 30 is displaced to the position of the lower heat radiating fan 51 or the upper heat radiating fan 52.

  FIG. 6 is an external perspective view showing the heat dissipation structure 1 shown in FIG. In FIG. 6, the shutter sensor arrangement areas 14 </ b> A and 14 </ b> B are shown by partially cutting away the side wall around the heat generating member arrangement area 12 described above. The shutter sensor arrangement area 14 </ b> A corresponds to the position of the lower radiating fan 51, and the shutter sensor arrangement area 14 </ b> B corresponds to the position of the upper radiating fan 52. In the example shown in FIG. 6, an opening is formed in each of the shutter sensor arrangement areas 14 </ b> A and 14 </ b> B, and when the shutter 30 is displaced to each position, a part of the shutter 30 closes the opening. Therefore, by providing a shutter sensor at each of the positions of the shutter sensor arrangement regions 14A and 14B, it is possible to detect which of the lower heat radiating fan 51 and the upper heat radiating fan 52 the shutter 30 is displaced to. it can. It should be noted that the lead wires of the shutter sensors arranged at the positions of the shutter sensor arrangement areas 14A and 14B can be connected to a printed circuit board or an electronic component installed in the heat generating member arrangement area 12.

  In such a configuration, the heat dissipation structure 1 according to the present embodiment drives the lower heat dissipation fan 51 without driving the upper heat dissipation fan 52 when the shutter 30 is located above, that is, in a position covering the upper heat dissipation fan 52. To control. Further, in the heat dissipation structure 1 according to the present embodiment, when the shutter 30 is located below, that is, in a position covering the lower heat dissipation fan 51, the upper heat dissipation fan 52 is driven without driving the lower heat dissipation fan 51. Control. Thus, in the heat dissipation structure 1 according to the present embodiment, when the shutter sensor detects the sliding of the shutter 30, the drive of the heat dissipation fan is switched from the lower heat dissipation fan 51 to the upper heat dissipation fan 52 or vice versa. Can be controlled.

  FIG. 7 is a functional block diagram illustrating a configuration for controlling switching of driving of the heat dissipation fan by sliding of the shutter 30 in the heat dissipation structure 1.

  As shown in FIG. 7, the heat dissipation structure 1 according to the present embodiment has, as a functional configuration, the above-described lower heat dissipation fan 51 and upper heat dissipation fan 52, the control unit 100, the drive sensor 110, and the shutter sensor 120. And.

  The control unit 100 controls driving of the lower radiating fan 51 and the upper radiating fan 52. The drive sensor 110 detects the driving state of the lower radiating fan 51 and the upper radiating fan 52 and notifies the control unit 100 of the detection result. The shutter sensor 120 is a sensor installed in the shutter sensor arrangement regions 14 </ b> A and 14 </ b> B described with reference to FIG. 6, and the position of the heat dissipation fan of the lower heat dissipation fan 51 or the upper heat dissipation fan 52 is displaced. Is detected. The control unit 100 performs control so that one of the lower radiating fan 51 and the upper radiating fan 52 is driven and the other is not driven according to the position of the shutter 30 detected by the shutter sensor 120.

  In the heat dissipation structure 1 according to the present embodiment, when switching the heat dissipation fan to be driven, the operation of sliding the shutter 30 may be a manual operation by the user or an automatic operation that is mechanically driven. You can also.

  That is, in the heat radiating structure 1, when the lower heat radiating fan 51 that has been driven reaches the end of its life or malfunctions due to a failure or the like, the user slides the slide knob 40 to displace the shutter 30 downward to drive the upper side. Switching to the heat dissipation fan 52 is possible. In this case, the drive sensor 110 detects the driving state of the lower radiating fan 51, and issues a warning display or a warning sound so as to notify the user when a problem occurs in the lower radiating fan 51. It is preferable to do so.

  In the heat dissipation structure 1, a power mechanism that allows the shutter 30 to slide upward or downward can be installed. In this case, in the heat dissipation structure 1, when the drive sensor 110 detects that a problem has occurred in the lower heat dissipation fan 51 that has been driven, the control unit 100 displaces the shutter 30 downward to drive the upper heat dissipation fan. Control to switch to 52. If it does in this way, even if a malfunction arises in one heat dissipation fan, the fan to drive can be switched, without producing a user's trouble.

  Next, a description will be given of measures for preventing a malfunction of a heat dissipation fan that is not normally driven.

  In the above-described example, it has been described that when the operation of the heat dissipation structure 1 is started, the lower heat dissipation fan 51 is driven and the upper heat dissipation fan 52 is not driven as a spare. However, if the heat-dissipating fan prepared as a spare is left without being driven for a long period of time, there is a possibility that a failure occurs in the rotating mechanism. For example, it is conceivable that grease applied to the rotating shaft and the bearing of the heat radiating fan adheres, or that these members cause an oil film breakage, thereby inhibiting smooth rotation of the heat radiating fan.

  For this reason, in the heat dissipation structure 1 according to the present embodiment, the heat-dissipating fan prepared as a spare is intermittently driven at a lower rotational speed than in normal driving even when it is covered with the shutter 30. Is preferred.

  FIG. 8 is a flowchart for explaining an example of control for switching the fan to be driven when a malfunction occurs in the radiating fan that is being driven, while preventing the malfunction of the radiating fan that is not normally driven.

  At the time when the control shown in FIG. 8 is started, it is assumed that the lower heat radiating fan 51 is normally driven and the upper heat radiating fan 52 is covered by the shutter 30 as a spare and is not normally driven. When the control shown in FIG. 8 starts, the control unit 100 determines whether or not a predetermined period has elapsed by using a built-in timer (step S11). Here, the “predetermined period” means that the grease or the like applied to the rotating shaft and bearing of the upper heat radiating fan 52 covered with the shutter 30 as a reserve adheres, or that these members cause the oil film to break. It is preferable to set in advance a period such as not to do. Moreover, when the control part 100 does not incorporate the timer, you may make it receive the information of time or time from the outside.

  If it is determined in step S11 that the predetermined period has elapsed, the control unit 100 controls to temporarily drive the upper heat radiating fan 52 covered with the shutter 30 (step S12). Here, when driving the upper heat radiating fan 52 as a spare, as described above, it is driven intermittently at a lower rotational speed than in normal driving while being covered with the shutter 30. Is preferred.

  Thereafter, while the lower heat radiating fan 51 is normally driven, it is detected whether or not the drive sensor 110 detects a malfunction in the driving state of the lower heat radiating fan 51 (step S13). If a malfunction of the lower heat radiating fan 51 is detected in step S13, the control unit 100 stops driving the lower heat radiating fan 51 (step S14), displaces the shutter 30 downward (step S15), and then moves the upper side. Control is performed to drive the heat dissipation fan 52 (step S16). Note that the operation of switching the fan to be driven by displacing the shutter 30 downward in step S15 can be a manual operation by the user or an automatic operation that is mechanically driven as described above.

  Therefore, in the heat dissipation structure 1 according to the present embodiment, the control unit 100 controls the driving of the heat dissipation fan and the displacement of the shutter 30 according to the malfunction of the lower heat dissipation fan 51 and the upper heat dissipation fan 52. be able to. Further, the control unit 100 may control the driving of the heat dissipation fan and the displacement of the shutter 30 according to the period until the lifetime of the lower heat dissipation fan 51 and the upper heat dissipation fan 52. Further, the control unit 100 controls the driving of the heat dissipation fan and the displacement of the shutter 30 according to the period during which the lower heat dissipation fan 51 and the upper heat dissipation fan 52 are not driven. May be.

  As described above, according to the heat dissipation structure 1 according to the present embodiment, when a malfunction occurs in the radiating fan that is being driven, the radiating fan that is not normally driven is reduced while the malfunction is generated. The fan can be easily switched.

  Hereinafter, effects of the heat dissipation structure 1 according to the present embodiment will be further described.

  When performing solar power generation, in a power conditioner that converts a direct current generated by a solar panel into an alternating current, it is often premised that the heat dissipating fan needs to be replaced as a maintenance part. Such a heat radiating fan reaches the end of its life when used for a certain period of time, and it is difficult to realize a maintenance-free power conditioner. Also, when replacing the heat dissipation fan, as long as the solar panel generates power, current always flows inside the inverter, so it is necessary to perform extensive work such as disconnecting the solar panel cable in the live state. Such an operation is difficult unless the engineer has specialized knowledge. For this reason, the expense concerning replacement | exchange of a thermal radiation fan becomes expensive. In addition, the operation of the power conditioner must be interrupted until the specialist fan replaces the heat dissipation fan after the heat dissipation fan has stopped due to the end of its service life. I can't do it.

  However, according to the heat dissipation structure 1 according to the present embodiment, since it is not necessary to immediately replace the heat dissipating fan that has stopped due to its life, the power conditioner is operated even during the time until the heat dissipating fan that has been stopped is replaced, The generated power can be sold. In addition, according to the heat dissipation structure 1 according to the present embodiment, when replacing a heat dissipation fan that has stopped due to a lifetime, a replacement operation can be easily performed simply by removing the fan cover 20 and the shutter 30. Furthermore, when the heat radiating fan is replaced, the operation of the power conditioner is not stopped and the printed circuit board on the high voltage side is not touched, so that the work can be performed safely.

  Although the present invention has been described based on the drawings and examples, it should be noted that those skilled in the art can easily make various modifications and corrections based on the present disclosure. Therefore, it should be noted that these variations and modifications are included in the scope of the present invention. For example, the functions included in each functional unit, each means, each step, etc. can be rearranged so that there is no logical contradiction, and a plurality of functional units, steps, etc. are combined or divided. It is possible. Further, each of the above-described embodiments of the present invention is not limited to being performed faithfully to each of the embodiments described above, and can be implemented by appropriately combining each feature.

  For example, in the above description, the present invention has been described as the invention of the heat dissipation structure, but the present invention is not limited to the invention of the heat dissipation structure, and can be applied to the heat dissipation control method of the heat dissipation structure as described above. Can do. In this case, in this method, the shutter 30 covers one of the lower radiating fan 51 and the upper radiating fan 52, and the other of the radiating fans is driven and the state of the other radiating fan. It is preferable to have a step of detecting the above, a step of displacing the shutter 30 in accordance with the state of the other radiating fan, and a step of driving the radiating fan. It is.

  In the above description, the heat dissipation structure 1 is described as including two heat dissipation fans. However, the number of heat dissipation fans included in the heat dissipation structure according to the present invention is not limited to two. For example, the heat dissipation structure according to the present invention can be at least two arbitrary numbers. In this case, two such heat dissipating fans may be used as a unit, and a large number of such units may be installed, or at least one of the plurality of heat dissipating fans is covered with the shutter, and the others are not covered with the shutter. It may be.

DESCRIPTION OF SYMBOLS 1 Heat radiation structure 10 Housing | casing 12 Heating member arrangement | positioning area | region 14A, 14B Shutter sensor arrangement | positioning area 20 Fan cover 30 Shutter 40 Slide knob 51 Lower side radiating fan 51A Inlet 51B Exhaust outlet 52 Upper radiating fan 60 Radiating fin 70 Bending part 80 90 Negative pressure chamber 100 Control unit

Claims (11)

A housing having a first heat dissipation fan and a second heat dissipation fan;
A shutter configured to cover one of the first heat dissipation fan and the second heat dissipation fan;
With
A heat dissipation structure characterized in that a heat dissipation fan covered with the shutter and a heat dissipation fan not covered can be switched between the first heat dissipation fan and the second heat dissipation fan according to the displacement of the shutter. .   The heat dissipation structure according to claim 1, wherein the shutter is configured to cover one of the first heat dissipation fan and the second heat dissipation fan by being displaced by sliding movement.   The heat dissipation structure according to claim 1 or 2, wherein the shutter is configured to cover both sides of one of the first heat dissipation fan and the second heat dissipation fan.   4. The heat dissipation structure according to claim 1, wherein exhaust ports of the first heat dissipation fan and the second heat dissipation fan are arranged side by side along a direction in which the shutter is displaced.   The heat dissipation structure according to claim 4, wherein exhaust ports of the first heat dissipation fan and the second heat dissipation fan are arranged in a vertical direction.   The heat dissipation structure according to claim 5, wherein, among the first heat dissipation fan and the second heat dissipation fan, the heat dissipation fan disposed on the upper side is provided as a spare for the heat dissipation fan disposed on the lower side.   7. The heat dissipation structure according to claim 5, wherein a dust reservoir or a drain recess is provided below one of the first heat dissipation fan and the second heat dissipation fan disposed on the lower side.   The heat dissipation according to any one of claims 1 to 7, further comprising: a control unit that controls driving of the heat dissipation fan and controls displacement of the shutter according to a failure of the first heat dissipation fan and the second heat dissipation fan. Construction.   The apparatus according to claim 1, further comprising a control unit that controls driving of the heat dissipation fan and controls displacement of the shutter according to a period until the lifetime of the first heat dissipation fan and the second heat dissipation fan. The heat dissipation structure described.   According to a period during which the state where the first heat radiating fan and the second heat radiating fan are not driven is continued, the control unit controls the driving of the heat radiating fan and the displacement of the shutter. The heat dissipation structure according to claim 1. A first heat radiating fan and a second heat radiating fan are arranged side by side and provided with a shutter configured to cover one of the first heat radiating fan and the second heat radiating fan, and according to the displacement of the shutter A heat dissipation control method of a heat dissipation structure that enables switching between a heat dissipation fan covered by the shutter and a heat dissipation fan not covered among the first heat dissipation fan and the second heat dissipation fan,
Driving the other of the first heat dissipation fan and the second heat dissipation fan with the shutter covering one of the first heat dissipation fan and the second heat dissipation fan;
Detecting the state of the other radiating fan;
According to the state of the other heat dissipation fan, displacing the shutter to cover the other heat dissipation fan;
Driving the one heat dissipation fan;
A heat dissipation control method.

Images