JP2013021121A - Electronic apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an electronic apparatus including a heat radiation unit which prevents the radiation efficiency of heat from a heating component from deteriorating while including a cleaning member ensuring to remove dust adhered to a fin.SOLUTION: An electronic apparatus includes: a housing 20a where electronic components including a heating component 24 generating heat during the operation are housed; a heat radiation body 37 including multiple fins 37a to which heat from the heating component 24 is transmitted; a fan 31 blowing cooling air to the heat radiation body 37; a connection body 36 connecting the fan 31 with the heat radiation body 37 and introducing all cooling air generated by the operation of the fan 31 to the heat radiation body 37; a cleaning member 35 removing dust adhered to the fins 37a of the heat radiation body 37; and a control part controlling the operation of the cleaning member 35. The control part holds the cleaning member 35 so as not to block the cooling air when the fan 31 operates.

Description

  The present invention relates to an electronic device having a heat-generating component that generates heat during operation, for example, an electronic device such as a notebook computer having a CPU (Central Processing Unit) that is a heat-generating component, and in particular, heat from the heat-generating component is externally provided. The present invention relates to the structure of the heat radiation unit to be released.

  For example, in the case of a notebook personal computer which is an example of an electronic device, the amount of heat generated from a heat-generating component such as a CPU increases with the performance improvement. In addition, in the case of a notebook computer that is a portable electronic device, there is a demand for downsizing and weight reduction as a portable electronic device, so various electronic components are packed inside a narrow housing, There is a need to provide a high-performance heat dissipation unit that can effectively release heat from the heat-generating component to the outside of the housing.

  In order to meet such a demand, a heat radiating unit including a heat radiating body having a heat radiating fin to which heat from a heat generating component is transmitted and a fan as a blowing means for sending cooling air into the heat radiating body is used. . In this conventional heat radiating unit, the CPU, which is a heat generating component, is brought into contact with the heat radiating body directly or indirectly by a heat pipe or the like to transmit the heat, and the heat of the transmitted heat generating component is transmitted by cooling air from the fan. Release to the outside of the housing is performed. In such a conventional heat dissipating unit, it is effective to increase the surface area of the fins in order to further improve the heat dissipating effect, and the fins are formed at narrow formation intervals in a limited narrow space. However, if the fin formation interval is narrowed, fine dust contained in the cooling air supplied by the fan tends to adhere particularly to the side surface of the fin facing the fan. The dust adhering to the side surface of the fin tends to accumulate rapidly once it adheres, and the accumulated dust fills the gap between the fins and covers the entire surface on the side where the cooling air from the radiator fan flows. As a result, the cooling air from the fan cannot be sent into the gap between the fins, and the heat dissipation effect of the heat dissipation unit is significantly impaired.

  Thus, in order to prevent dust from adhering to the side surface of the fin and damaging the heat dissipation effect of the heat dissipation unit, a heat dissipation unit including a brush that is a cleaning member for removing dust attached to the fin has been proposed. (See Patent Document 1).

  FIG. 7 shows a schematic configuration of a heat radiating unit described in Patent Document 1 and used in a conventional electronic device.

  The conventional heat radiating unit 100 includes a fan 131 that blows cooling air and a heat radiating body (heat sink) 136 having fins that do not appear in the drawing. The cooling air from the fan 131 is discharged to the outside of the housing 120 through the gap between the fins formed on the heat radiator 136, so that the heat of the CPU (not shown), which is a heat generating component transmitted to the heat radiator 136, is generated. Released outside the body 120.

  At the end of the radiator 136 on the side where the fan 131 is disposed, a brush 133, which is a cleaning member that can rub off dust adhering to the fins of the radiator 136, and this brush 133 is indicated by an arrow 141 in the figure. And a rotating mechanism 134 that moves in the direction.

  The conventional heat radiating unit 100 includes an operating body (not shown) that rotates the rotating mechanism 134, and is interlocked when the user pushes the operating body as necessary, or when the lid of the notebook computer is closed, for example. As a result, the brush 133 rotates in the direction of the arrow 141 to clean the side surfaces of the fins. At this time, the dust removed from between the fins by the brush 133 is discharged to the outside from the discharge port 121 formed in the housing 120 by the cooling air from the fan 131.

  Further, in the conventional heat radiating unit 100, an opening 135 is provided on the lower surface of the connection body 132 connecting the fan 131 and the heat radiating body 136, and dust removed by the brush 133 is removed from the opening 135 through the housing 120. Fall into the inside. The fallen dust passes through the housing 120 from the opening 135, which is another flow path, which is larger than the flow of the cooling air that is discharged to the outside of the housing 120 through the radiator 136, and the discharge port. It is discharged from the flow path connected to 121 to the outside of the housing 120.

  Patent Document 1 discloses that dust attached to the fin by the brush 133 is removed using a motor that can be electrically controlled. Examples of the timing at which the brush 133 operates include a case where it is detected that the CPU is shut down, a case where the temperature of the CPU reaches a certain temperature, or a case where the usage time of the notebook computer reaches a certain time. ing.

JP 2008-306001A

  The conventional heat dissipation unit 100 of the electronic device includes a brush 133 that is a cleaning member that removes dust contained in the cooling air from the fan 131 attached to the fin, and can remove dust attached to the fin at a predetermined timing. It is possible to avoid a situation in which a large amount of dust accumulates on the fin and the cooling air is prevented from flowing.

  However, in the conventional heat radiating unit 100, it is assumed that the CPU, which is a heat-generating component, operates and cooling air is blown from the fan 131 as the timing for removing dust attached by the brush 133. In the conventional heat dissipating unit 100, the brush 133 has a shape that does not completely block the cooling air flow path in the heat dissipating body 136, and when the dust is removed, the cooling air does not flow and the heat dissipating effect is lost. Although it is prevented, the heat radiation efficiency is inevitably lowered due to the presence of the brush in the cooling air flow path. Further, in the conventional heat radiating unit 100, the brush 133 is used as a cooling air flow path when dust is removed, and as a flow path for discharging the dust removed by the brush 133 to the outside of the housing 120. An opening 135 is provided on the lower surface of the connection body 132 that connects the fan 131 and the heat dissipation body 136. However, since the opening 135 is provided, a part of the cooling air from the fan 131 cannot constantly pass through the radiator 136, and the cooling air from the fan 131 is completely discharged to the heat of the radiator 136. In other words, the heat dissipation efficiency is always reduced in that it cannot be used.

  Thus, in the conventional heat dissipation unit 100, since the cooling air from the fan 131 cannot be used effectively, it can be said that it can sufficiently cope with the recent high performance of notebook computers in which the CPU emits more heat. There wasn't.

  The present invention solves the problem in the electronic apparatus having the above-described conventional heat radiating unit, and does not reduce the heat radiating efficiency of heat from the heat-generating component while including a cleaning member that can reliably remove dust adhering to the fin. An object is to obtain an electronic device equipped with a heat dissipation unit.

  In order to solve the above-described problems, an electronic device according to the present invention includes a housing in which an electronic component including a heat generating component that generates heat during operation is housed, and a heat dissipator including a plurality of fins to which heat generated from the heat generating component is transmitted. A fan that blows cooling air to the heat radiating body, a connection body that connects the fan and the heat radiating body, introduces all the cooling air generated by the operation of the fan to the heat radiating body, and the fins of the heat radiating body A cleaning member that removes dust adhering to the cleaning member, and a control unit that controls the operation of the cleaning member. The control unit does not block the cooling air when the fan is operating. It is characterized by holding in a state.

  In the electronic device according to the present invention, the cleaning member that removes dust attached to the fins of the heat radiating body to which heat from the heat generating component is transmitted does not block the cooling air when the fan is operated by the control unit. Retained. Moreover, the electronic device of the present invention includes a connection body that introduces all the cooling air from the fan into the heat radiating body. For this reason, the electronic device which can discharge | release efficiently the heat | fever of the heat generating member transmitted to the heat radiator to the exterior of a housing | casing using the cooling wind from a fan can be obtained.

It is a perspective view which shows the example of schematic structure of the notebook computer concerning this embodiment. It is a disassembled perspective view which shows the main structures of the thermal radiation unit in the notebook computer concerning this embodiment. It is a horizontal sectional view which shows the structure of the thermal radiation unit of the notebook computer concerning this embodiment. It is a principal part enlarged plan view which shows the structure of the cleaning member of the thermal radiation unit of the notebook computer concerning this embodiment. It is a figure which shows the state before the cleaning member operate | moves in the thermal radiation unit of the notebook computer concerning this embodiment. It is a figure which shows a state when the cleaning member operate | moves in the thermal radiation unit of the notebook computer concerning this embodiment. It is a figure explaining the structure of the conventional heat radiating unit.

  An electronic device according to the present invention includes a housing that houses an electronic component including a heat-generating component that generates heat during operation, a heat radiator that includes a plurality of fins to which heat generated from the heat-generating component is transmitted, and a cooling to the heat radiator. A fan that blows air, a connection body that connects the fan and the heat radiating body, introduces all cooling air generated by the operation of the fan into the heat radiating body, and dust attached to the fins of the heat radiating body. A cleaning member to be removed and a control unit that controls the operation of the cleaning member are provided, and the control unit holds the cleaning member in a state that does not block the cooling air when the fan is operating.

  In the electronic device according to the present invention, the cleaning member that removes dust adhering to the fins of the heat radiating body to which the heat of the heat-generating component is transmitted, when the fan is operating, the cleaning member blocks the cooling air from the fan. It is kept in a state that is not. Further, the connecting body connecting the fan and the heat radiating body introduces all the cooling air generated by the operation of the fan into the heat radiating body. For this reason, the cooling air generated by the operation of the fan can be effectively used for heat dissipation from the fins of the heat dissipator, and dust attached to the fins causing the heat dissipation efficiency to be removed can be removed for a long time. An electronic device that exhibits a stable heat dissipation effect can be obtained.

  In the electronic apparatus having the above configuration, a dust removal port whose opening and closing is controlled by the control unit is formed in the connection body, and the control unit opens the dust removal port only when the fan is not operating. It is preferable to do. By doing in this way, the dust removed from the fin by the cleaning member can be discharged into the housing in a state where the cooling air is not blown from the fan and there is no fear of a decrease in heat dissipation efficiency.

  Moreover, it is preferable that the cleaning member removes dust adhering to a side surface of the fin facing the fan. By doing in this way, the dust on the side facing the fan of the fin, where the dust and dust contained in the cooling air from the fan are likely to adhere and accumulate, can be removed, and the side of the fin facing the fan It is possible to effectively prevent the cooling air from being blown into the gaps between the fins due to the dust accumulated on the surface and the heat dissipation efficiency being lowered.

(Embodiment of the Invention)
Hereinafter, as an embodiment of the present invention, a case where an electronic device is a notebook computer will be described as an example.

  FIG. 1 shows a notebook computer 1 as an electronic apparatus according to the present embodiment.

  In the notebook personal computer 1 according to the present embodiment, the lid 10 having a display device 12 such as a liquid crystal panel disposed on the inner surface is opposed to the main body 20 having an input device such as a keyboard 21 and a pointing device 22 disposed on the surface. The hinge mechanism 11 is rotatably attached.

  Inside the main unit 20, a secondary battery (not shown) that is an operating power source of the notebook computer 1, a hard disk drive (HDD) that is not shown that is a main recording device, and other electrical components are arranged. Note that the notebook computer 1 of this embodiment includes, for example, an antenna module for wireless LAN communication, a disk drive corresponding to a Blu-ray disc or a DVD disc, a web camera element, an audio microphone, a speaker, and other various input / output terminals. Although these functions and shapes are the same as those of a conventionally known notebook computer, illustration and detailed description are omitted.

  FIG. 2 is an exploded perspective view showing the internal configuration of the main body 20 of the notebook computer 1 according to the present embodiment. In FIG. 2, among various electronic components arranged inside the main body 20, the central processing element (CPU) 24, which is a representative heat-generating component having the highest temperature during operation, and the heat of the CPU 24 are transmitted to the main body 20. Only the vicinity of the heat radiating unit 30 discharged to the outside of the casing 20a constituting the outer shell is shown in an enlarged manner.

  As shown in FIG. 2, a CPU 24 is mounted on a circuit board 23 in a lower portion of a keyboard 21 disposed on the surface of the main body 20 of the notebook personal computer 1 of the present embodiment. On the upper surface of the CPU 24, a heat receiving portion 25 for transmitting heat generated when the CPU 24 operates to the heat radiating unit 30 is disposed. The heat receiving portion 25 is fixed by a fixing member 26 having spring-like legs so as to be pressed against the CPU 24 which is a heat source.

  A heat pipe 27 made of, for example, copper is connected to the heat receiving portion 25 to transmit the received heat to the heat radiating body 37 of the heat radiating unit 30. In the heat pipe 27, for example, a heat conductive medium such as alternative chlorofluorocarbon having high thermal conductivity is enclosed, and the heat of the CPU 24 transmitted to the heat receiving unit 25 is efficiently transmitted to the heat radiating body 37.

  In the notebook personal computer 1 of the present embodiment, as the heat dissipation unit 30 for effectively releasing the heat of the CPU 24 to the outside of the housing 20 a of the main body 20, the heat dissipator 37 and the fan 31 arranged alongside the heat dissipator 37. And have. Cooling air that the fan 31 sucks from the suction port 32a formed on the upper surface of the fan case 32 and blows air is introduced into the heat radiating body 37, passes through the gaps of the fins 37a provided on the heat radiating body 37, and the outside of the housing 20a. The heat radiation effect from the heat radiating body 37 is enhanced. Between the heat radiating body 37 and the fan 31, a connecting body 36 in which a cleaning member for removing dust attached to the fins 37a of the heat radiating body 37 is disposed is disposed.

  FIG. 3 is a diagram showing a configuration of the heat dissipation unit 30 in the notebook computer of the present embodiment.

  In FIG. 3, the detailed structure of each of the fan 31 constituting the heat radiating unit 30, the cleaning member 35, the connecting member 36 in which the cleaning member 35 is disposed and the heat radiating body 37 are connected, and the heat radiating body 37. For the sake of illustration, each member is shown in a horizontal sectional view taken along a horizontal plane parallel to the main surface of the main body 20 of the notebook computer 1 on which the keyboard 21 is disposed.

  The fan 31 takes in ambient air from a suction port 32a shown in FIG. 2 formed on the upper surface of the fan case 32, as the blades 33 accommodated in the fan case 32 rotate about the rotation shaft 34. Then, the air is blown out as cooling air from the exhaust port 32b on the radiator 37 side. In FIG. 3, a sirocco fan in which the blades 33 are configured with a large number of forward blades is illustrated as the fan 31 of the present embodiment. However, the overall shape of the fan 31, the shape of the suction port 32 a, and the rotation shaft 34 are illustrated. The shape of the blades 33 or the like around the fan is merely an example, and the fan 31 may be various types that have been used in the past as long as the surrounding air can be sucked from the suction port and blown out from the exhaust port. The cooling fan (heat radiating fan) can be used.

  In the heat dissipating unit of the present embodiment, a connecting body is provided between the exhaust port 32 b of the fan 31 and the heat dissipating body 37 without being disposed in close contact with the exhaust port 32 b provided in the fan case 32 of the fan 31. 36 is arranged.

  In the heat radiating unit 30 of the notebook computer 1 according to the present embodiment, the connecting body 36 surrounds the exhaust port 32b of the fan case 32 of the fan 31 and the outer periphery of the heat radiating body 37. All the wind is introduced into the radiator 37. As a result, in the heat radiating unit 30 of the notebook computer 1 of the present embodiment, the exhaust member 32a of the fan 31 and the heat radiating body 37 are not closely disposed because the cleaning member 35 is disposed. All of the cooling air can be used for heat dissipation of the radiator 37.

  Inside the connection body 36, a cleaning member 35 is disposed between the exhaust port 32b of the fan 31 and the side surface 37b of the fin 37a facing the fan 31. The cleaning member 35 of the present embodiment is fixed to the rotation shaft 35a disposed in a direction perpendicular to the flow path of the cooling air from the fan 31, and rotates together with the rotation shaft 35a. And a drive unit 35c that rotates the rotation shaft 35a based on an instruction from a control unit (not shown).

  The heat radiating body 37 is made of a metal such as copper having high thermal conductivity, and a plurality of thin plate-like fins 37a are arranged along a direction in which cooling air blown from the fan 31 toward the outside of the housing 20a flows. Are formed in parallel. The size of the radiator 37, particularly the width and height of the outer shape viewed from the fan 31 side, are the same as the width and height of the outer shape of the exhaust port 32b of the fan 31.

  The cooling air that has passed through the gaps between the fins 37a of the heat radiating body 37 is discharged to the outside of the housing 20a from the discharge port 28 formed as a slit or a through-hole in the housing 20a corresponding to the outer shape of the heat radiating body 37. The

  FIG. 4 is an enlarged view of a portion where the cleaning member 35 and the connection body 36 are disposed between the fan 31 and the heat radiating body 37.

  As shown in FIG. 4, cleaning elements 35 b disposed in the gap portions of the fins 37 a of the radiator 37 are fixed to the rotation shaft 35 a of the cleaning member 35. Each of the cleaning elements 35b is provided with a brush 35d that abuts against the mutually opposing main surface portions of the pair of fins 37a between which the cleaning element 35b is disposed. At this time, by making the length of the brush 35d slightly longer than the length that reaches the side of the fin 37a, the rotation shaft 35a is rotated by the drive portion 35c, and the cleaning element 35b is opposed to the fin 37a. During the operation of cleaning the dust on the surface, the dust attached to the side surface 37b facing the fan 31 of the fin 37a can be removed.

  Dust contained in the cooling air from the fan 31 is more likely to adhere and accumulate on the side surface 37b facing the fan 31 where the cooling air collides, than the main surfaces of the fins 37a facing each other through which the cooling air blows. For this reason, adjusting the length of the brush 35d formed on the cleaner 35b to remove the dust on the side surface 37b facing the fan 31 of the fin 37a reduces the heat dissipation effect caused by the dust attached to the fin 37a. It is preferable in preventing the above.

  Next, the operation | movement which removes the dust adhering to the thermal radiation body 37 of the thermal radiation unit 30 in the notebook personal computer 1 of this embodiment is demonstrated using FIG. 5 and FIG.

  5 and 6 are both vertical cross-sectional views showing the 30 configuration of the heat dissipation unit according to the present embodiment. 5 and 6 show a cross-sectional shape including a partial sum of the rotation shaft 34 of the fan 31, and show the shape of the portion along the line A-A ′ in FIG. 3.

  FIG. 5 shows a state where the fan 31 is operating and cooling air is introduced into the radiator 37.

  In a state where the fan 31 is operating in order to dissipate heat generated by heat-generating components such as the CPU 24 from the heat radiating body 37, the cleaning member 35 disposed between the fan 31 and the heat radiating body 37 is cleaned. The child 35b is held at the upper end of the radiator 37 as shown by the solid line in FIG. 5 in a state where the length direction of the cleaner 35b is parallel to the direction in which the cooling air flows. In the case of the cleaning member 35 of the heat radiating unit 30 of the present embodiment, the state in which the length direction of the cleaning element 35b is parallel to the direction in which the cooling air flows as shown in FIG. The surface area that appears when viewed from the side 31 is the smallest, and it can be said that this state is the state that most of the cooling air from the fan 31 is not blocked. As described above, the cleaning member 35 does not block the cooling air, so that the cooling air flowing into the heat radiating body 37 has the highest heat radiating effect in the heat radiating body 37. In the present specification, the state in which the cleaning member does not block the cooling air means that the cleaning member 35 is placed in the retreat position where the surface area viewed from the fan 31 side is reduced in the cooling air flow path as shown in FIG. It is shown including the state, and does not show only the state in which the cleaning member 35 is completely removed from the flow path of the cooling air flowing from the fan 31 to the radiator 37.

  Further, in the state where the fan 31 is operated and the cooling air is introduced into the heat radiating body 37, the bottom surface portion of the connection body 36 connecting the fan 31 and the heat radiating body 37 of the heat radiating unit 30 of the present embodiment, that is, a notebook. When the main body 20 of the personal computer 1 is placed on a desk or the like and used, the dust removal port 36a provided on the lower surface is covered with the lid 36c and closed. As described above, in the state where the cooling air is blown from the fan 31, the lid 36 c covering the dust removing port 36 a provided in the connection body 36 is closed, so that all of the cooling air from the fan 31 is dissipated. 37.

  On the other hand, FIG. 6 shows a cross-sectional configuration in a state where the fan 31 is stopped and the heat dissipation unit 30 is not operating.

  As shown in FIG. 6, in a state where the fan 31 is not operating, the drive unit 35c of the cleaning member 35 rotates the rotation shaft 35a based on a control signal from a control unit (not shown), thereby cleaning the cleaner. 35b moves between the fins 37a to remove the attached dust. The cleaning member 35 rotates about the rotation shaft 35a in the direction of the arrow 41 shown in FIG. 6, and the surface where the cleaning element 35b faces the fan 31 of the radiator 37 as shown by the solid line in FIG. Move to a state that is parallel to. The cleaning member 35 does not remove the dust adhering to the fins 37a in this way, but it rotates once again after returning to the retracted position shown by the dotted line in FIG. It may be repeated more than once. In addition, the control unit can improve the heat radiation efficiency by dust accumulated on the heat radiator 37 that appears in the operation time of the notebook computer 1, the elapsed time from the previous dust removal operation, the heat released from the heat radiator 37, the rotational speed of the fan 31, etc. When the degree of decrease can be detected, the number of times the cleaner 35b is rotated can be adjusted to a preferred number.

  In accordance with the timing at which the cleaning element 35b rotates, as shown by the arrow 42 in FIG. 6, the lid body 36b of the connection body 36 rotates about the shaft 36c, and the dust removal port 36a is opened. . By opening the dust removal port 36a, the dust attached to the fins 37a removed by the cleaning member 35 is discharged into the housing 20a without staying inside the connection body 36. For this reason, it is possible to effectively prevent dust accumulated in the connection body 36 from being mixed again into the heat radiating body 37 by the cooling air and adhering to the fins 37 a of the heat radiating body 37.

  Thus, in the heat radiating unit 30 of the present embodiment, the lid body 36b that covers the dust removal port 36a of the connection body 36 is rotated in conjunction with the operation of the cleaning member 35 to open the dust removal port 36a. The removal of dust from the fins 37a of the heat radiating body 37 and the release of the cooling air from the heat radiating unit 30 from the passage can be performed simultaneously.

  It has been described that the cleaning member 35 can be operated twice or more in succession. However, the cleaning member 35 is a series of the cover member 36b for opening and closing the dust removal port 36a of the connection body 36. During the operation, it is preferable to keep it open continuously.

  5 and 6, the cover body 36b covering the dust removal port 36a of the connection body 36 has been described as having a structure in which the entire bottom surface of the connection body 36 is the cover body 36b. It may be a form that covers only a part of the bottom surface, and is not limited to a structure that rotates around the shaft 36c, but may have a structure that slides to open the dust removal port 36a.

  As described above, the notebook computer 1 according to the present embodiment includes the cleaning member 35 that removes dust attached to the fins 37a of the heat radiating body 37 between the fan 31 and the heat radiating body 37 of the heat radiating unit 30. The member 35 is held in a state where the cooling air from the fan is not blocked when the fan 31 is operating. Further, in the notebook computer 1 of the present embodiment, the fan 31 and the heat radiating body 37 are connected by a connection body 36 that introduces all the cooling air from the fan 31 into the heat radiating body 37. For this reason, while providing a mechanism capable of removing dust adhering to the fins 37a, the air blown from the fan 31 can be effectively used for the heat radiation of the heat radiating body 37, and the heat radiation efficiency can be maintained high. It is possible to sufficiently cope with an increase in the amount of heat generated from the heat-generating component due to the above.

  In the above-described embodiment, the cleaning member 35 that removes dust attached to the fins 37a of the heat radiating body 37 rotates together with the rotating shaft 35a that is arranged perpendicular to the cooling air flow path from the fan 31. The example of the form provided with the cleaning element 35b arrange | positioned in the clearance gap between the fins 37a was illustrated. However, the cleaning member 35 of the present embodiment is not limited to the above-described form, and dust attached to the fins 37a of the radiator 37 can be removed according to an instruction from the control unit, and the fan 31 operates. As long as the cooling air from the fan 31 is not blocked, the shape is not limited.

  For example, even in the case of the cleaning member 35 in which the cleaning element 35b is disposed in the gap between the fins 37a as described in the above embodiment to remove dust, the driving direction rotates around the rotation axis. However, when the fan 31 is operating, it is retracted to the outside of the heat radiating body 37, and when removing the adhering dust, the cleaning element 35b is linearly arranged so that the cleaning element 35b is inserted from the outside of the heat radiating body 37. A moving form is conceivable. As described above, the portion where the dust adhering to the heat radiating body 37 is the largest is not the main surface portion where the adjacent fins 37a face each other, but the portion of the side surface 37b facing the fan 31 of the fin 37a. For this reason, as the cleaning member 35 for removing dust adhering to the side surface 37b of the fin 37a facing the fan 31, when the fan 31 is operated, the cooling air flow from the fan 31 is laterally (laterally) or vertically When the fan 31 is stopped and the operation of the fan 31 is stopped, the side surface 37b of the fin 37a is moved so as to be traced in the horizontal direction or the vertical direction to remove the attached dust. It is done.

  In the notebook computer 1 of the present embodiment, the timing at which the control unit operates the cleaning member 35 to remove dust adhering to the radiator is when the CPU 24 is stopped or when the main body 20 of the notebook computer 1 is horizontal. It is preferable that the notebook computer 1 is operated before and after the lid 10 is opened with respect to the main body 20. In particular, immediately before the operation, the dust removed by the cleaning member 35 is released to the outside of the casing 20a by the cooling air blown from the fan 31 toward the heat radiating body 37 when the notebook computer 1 operates. I can expect.

  In addition, as the electronic apparatus according to the present embodiment, a laptop computer in which a lid having a display device disposed on the inner surface is fixed to the main body so as to be rotatable is described as an example. The electronic device of the invention is not limited to such a notebook personal computer, but includes various portable electronic devices such as a tablet personal computer, a mobile phone, a portable game machine, a small television receiver, a Blu-ray displayer, and a navigation system. It can also be used for various electronic devices such as desktop computers and liquid crystal projectors.

  In the above embodiment, the CPU is illustrated as a heat generating component that generates heat during operation. However, the heat generating component is not limited to the CPU, and a semiconductor chip for image processing such as a video board or a secondary battery, Various heat-generating components that should release the heat to the outside of the housing can be targeted.

  Furthermore, in the said embodiment, although the example which used the heat pipe was shown as a means to transmit the heat | fever from CPU to a heat radiator, a heat radiator is directly attached to CPU which is a heat-emitting component via a heat conductive adhesive. By fixing, the heat from the heat-generating component can be directly transmitted to the heat radiating body.

  The electronic device according to the present invention can remove dust adhering to the fins of the heat radiating member as a heat radiating unit that discharges heat from the heat-generating components in the casing to the outside, and can effectively cool the cooling air from the fan. As an electronic device having a high heat dissipation effect that can be used, it can be applied to various applications.

1 Notebook PC (electronic equipment)
20 Main Body 20a Housing 24 CPU (Heat Generation Component)
30 Radiating unit 31 Fan 35 Cleaning member 37 Radiator 37a Fin 37b (facing the fan) side

Claims (3)

A housing containing electronic components including heat-generating components that generate heat during operation;
A radiator having a plurality of fins to which heat generated from the heat-generating component is transmitted;
A fan for blowing cooling air to the radiator;
A connecting body for connecting the fan and the radiator, and introducing all cooling air generated by the operation of the fan into the radiator;
A cleaning member for removing dust adhering to the fins of the radiator;
A control unit for controlling the operation of the cleaning member,
The electronic device is characterized in that the control unit holds the cleaning member in a state where the cooling air is not blocked when the fan is operating.   The dust removing port whose opening and closing is controlled by the control unit is formed in the connection body, and the control unit opens the dust removing port only when the fan is not operating. Electronics.   The electronic device according to claim 1, wherein the cleaning member removes dust attached to a side surface of the fin facing the fan.

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