JP6548142B2 - Electrical equipment - Google Patents

Description

  The present invention relates to an electrical device such as a power conditioner.

For example, the power conditioner has a configuration in which various electric components constituting an electric circuit for converting DC power generated by a power generation facility using a solar panel or the like into AC power are accommodated in a housing. . As a power conditioner of such a configuration, for example, there is one as shown in FIG. 8A (FIG. 8 is a schematic side sectional view schematically showing the power conditioner, and the vertical direction of the drawing is the power conditioner The vertical direction is when the installation is actually installed).
The power conditioner B shown in FIG. 8A is a wall-hanging type used by being attached to an outer wall of a house, etc., and a predetermined electrical component 95 is accommodated in a front opening-like housing 7 and a housing 7 The front opening of the front cover 8 is closed by the front cover 8. The front cover 8 is attached to the housing 7 by providing a flange portion 71 on the front surface of the housing 7 and bringing the outer peripheral edge of the front cover 8 into contact with the flange portion 71. A means of fastening the screw with a screw body 90 is adopted. A packing 98 for sealing is provided between the front cover 8 and the housing 7 to enhance waterproof performance.

  However, in the prior art, there is room for improvement as described below.

  That is, in the related art, as shown in FIG. 8B, when the screw body 90 is removed, the front cover 8 is not properly supported by the housing 7, and the operator can remove the front cover 8. There was a risk of dropping. When the front cover 8 is dropped, the front cover 8 is damaged. Also, unlike in FIG. 8, when a part of the electric component 95 protrudes to the front of the housing 7, a part of the dropped front cover 8 contacts the electric component 95 and the electric component 95 There is also a risk of damage. In the configuration shown in FIG. 8, the front cover 8 is provided with the upper bent piece 80, and the upper bent piece 80 is engaged with the flange 71 of the housing 7, but such engagement The state is easily released. In particular, in the case where the packing 98 is provided, the whole front cover 8 is pushed to the front of the housing 7 by the elastic force of the packing 98 when the tightening of the screw body 90 is released. Is more likely to fall.

For example, as shown in FIG. 9, the upper bent piece 80 of the front cover 8 is formed into a hook shape having an additional bent piece 80a, and the flange 71 of the housing 7 is used to solve the above-mentioned problems. The additional bending piece 80a may be configured to be able to be locked on the rear surface side of (see, for example, FIGS. 7 to 9 of Patent Document 1).
However, according to such a means, the shape of the upper bent piece portion 80 becomes complicated, and the number of bending processes in manufacturing the front cover 8 increases. This results in the disadvantage that the manufacturing cost is increased.

JP, 2012-169341, A

The present invention has been conceived under the circumstances as described above, and it is possible to reduce the risk of dropping the front cover when removing the front cover, and to appropriately suppress the increase in manufacturing cost. The challenge is to provide possible electrical devices.

  In order to solve the above problems, the present invention takes the following technical measures.

An electric device provided by the present invention has a front opening, and a housing that accommodates an electric component therein, and upper and lower parts of the front of the housing so as to close the front opening , An electrical device, comprising: a front cover attached using a plurality of fastening members, wherein an upward protrusion provided on an upper portion of a front part of the housing, and an upper end of the front cover An upper bending piece portion provided on the front cover so as to bend rearward of the housing and located on the upper side of the upward projecting portion and engageable with the upward projecting portion; When attached to the body, the front cover is compressed by the front cover in the housing space and the housing space in the front cover, and from the upper bending piece of the front cover Is characterized by further comprising a, a resilient force generating member capable of generating a resilient force for pressing the portion below the front of the housing.
Here, “in the housing space portion in the housing and the front cover” means that the elastic force generating member is located in the housing space portion inside them which is formed using the housing and the front cover. For example, a member (for example, the packing 98 for sealing shown in FIG. 8 above) which is merely interposed at the junction between the housing and the front cover and which is not substantially located in the housing space And the elastic force generating member is not included.
The electric device according to the present invention can be configured as a wall mounted power conditioner for outdoor installation.

According to such a configuration, the following effects can be obtained.
First, the upper bent piece of the front cover is in an engaged state disposed on the upward projecting portion of the housing, and the front cover is attached to the housing using the fastening member, the fastening member using the fastening member When the attached state (fastened state) of the front cover is released, a portion of the front cover below the upper bent piece portion of the front cover is pushed forward of the housing by the elastic force of the elastic force generation member . On the other hand, the upper bent piece portion of the front cover, by gravity rests on upwardly protruding portions of the housing (contact), a state in which frictional force is generated in the contact portion. In a state where such frictional forces are generated, the lower portion than the upper bent piece portion of the front cover is pushed in front of the housing, the protrusion of the upper bent piece portion and the housing of the front cover The engagement state with the piece is maintained, and the risk of the front cover falling can be reduced. As a result, it is possible to properly solve the problem that the front cover is damaged due to the drop of the front cover, or the electric device is damaged due to the dropped front cover hitting the electric device in the housing or the like. It becomes possible.
Second, the upper bent piece of the front cover does not have to be formed in the hook shape shown in FIG. 9 and may have a simple shape. Therefore, the manufacturing cost of the front cover can be prevented from increasing. On the other hand, as the elastic force generating member, for example, a resin such as an inexpensive foam resin, rubber, or the like may be used, and the parts cost and the assembly cost of these can be kept low. Therefore, it can be appropriately avoided that the manufacturing cost of the entire apparatus is significantly increased.

  In the present invention, preferably, the sheet further includes an insulating sheet covering the front side of the electric component attached to the housing and housed in the housing, and the elastic force generating member is the insulating sheet. Is an elastic member attached to the front of the housing.

  According to such a configuration, since the configuration intended by the present invention is constructed by a simple configuration in which the elastic member is attached to the insulating sheet, it is more preferable in terms of facilitation of production and suppression of production cost. It becomes.

  In the present invention, preferably, the electrical component accommodated in the housing includes an electrical component constituting a display unit for displaying the operating condition of the electrical device, and the insulating sheet is disposed in front of the display unit. The display is provided so as not to cover, and the front cover is provided with a see-through window so that the display can be viewed from the front of the front cover via the see-through window, and the elasticity The member is located on the upper side of the display unit and is provided in a state of being protruded forward from the insulating sheet.

  According to such a configuration, it is possible to appropriately view the display unit in the housing from the front of the front cover, but of course, the elastic member has a role as a protection ridge located on the upper side of the display unit. Can be More specifically, for example, when rainwater, dust, or the like enters the case, the rainwater or dust can be blocked by the elastic member to prevent the rain water or dust from reaching the position of the display unit. . Therefore, it helps to prevent the display unit from getting wet with rain water or getting dirty by dust.

  In the present invention, preferably, at least one frame used for attaching the electric component is incorporated in the housing, and as the frame, the elastic member of the insulating sheet is attached. A frame is provided which can restrict the elastic member from moving rearward by abutting on the rear surface of the portion.

  According to such a configuration, since the elastic member is restricted from moving rearward, the compression of the elastic member and the generation of the elastic force when the compression state is released can be more appropriately performed. it can. Since the restriction of the rearward movement of the elastic member is performed using a frame used for mounting of the electrical component, it is not necessary to use a dedicated member, and its configuration is reasonable.

  In the present invention, preferably, the electrical component is provided with at least a portion thereof projecting forward from a front opening of the housing, and the front cover is the projecting portion of the electrical component And a bulging portion bulging forward relative to the other portion of the front cover so as to avoid interference of the front cover, and the elastic force generating member is provided to abut on the bulging portion. There is.

  According to such a configuration, the electrical components can be stored efficiently, which is preferable in reducing the size of the case. Further, since the elastic force generating member is in contact with the bulging portion of the front cover, the bulging portion is supported by the elastic force generating member, and a defect such as deformation of the bulging portion to the housing side is prevented. The effect of being able to do is also obtained.

  Other features and advantages of the present invention will become more apparent from the description of the embodiments of the present invention given below with reference to the attached drawings.

It is a perspective view of the power conditioner equivalent to an example of the electric device concerning the present invention. It is a perspective view of the state which removed the front cover of the power conditioner shown in FIG. It is a disassembled perspective view which shows the housing | casing internal structure of the power conditioner shown in FIG. 1, and an insulation sheet. It is a perspective view in the state where the auxiliary case and front cover with which the back part of the case of the power conditioner shown in Drawing 1 was equipped were removed. (A) is Va-Va sectional drawing of FIG. 1, (b) is principal part sectional drawing which shows the state at the time of removing a front cover in the structure of (a). It is a principal part disassembled sectional view of Drawing 5 (a). It is principal part sectional drawing which shows the other example of this invention. (A), (b) is a schematic sectional drawing which shows an example of a prior art. It is a schematic sectional drawing which shows the other example of a prior art.

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

  Power conditioner A shown in FIG. 1 is, for example, a wall-mounted type for outdoor installation which is used by being attached to a wall of a house or the like in a wall-mounted state, and corresponds to an example of the electric device in the present invention. Similar to the existing power conditioners, this power conditioner A has a function of converting DC power generated in a solar panel or the like into AC power of a predetermined frequency such as 50 Hz or 60 Hz and linking it to a commercial system. It is.

  As well illustrated in FIGS. 2 to 4, the power conditioner A is for closing the front opening 10 of the substantially rectangular metal case 1 having the front opening 10 and the housing 1. Front cover 2, an insulation sheet 4 attached to the front portion in the housing 1, an elastic member 6 attached to the insulation sheet 4 (corresponding to an example of a resilient force generation member according to the present invention), and a housing It has an auxiliary housing 5 assembled to the back of the body 1.

  In the housing 1, various electric components 3 constituting a power supply circuit, an inverter circuit, an output circuit and the like are accommodated. As shown in FIG. 4, a heat sink 39 having a plurality of fins 39 a for receiving heat conduction from the plurality of electrical components 3 and radiating the heat is provided on the back surface portion of the housing 1. The auxiliary housing 5 is for covering the heat sink 39, and combines the frame 50 having the upper wall portion 50a and the left and right side wall portions 50b with the rear panel 51 having the rear plate portion 51a and the lower wall portion 51b. It is A plurality of vent holes 52 a to 52 c are provided in these members, and air (external air) for cooling the heat sink 39 can flow into and out of the auxiliary housing 5. The heat sink 39 is made of a material excellent in water resistance because there is a possibility that rain water or the like may infiltrate into the auxiliary housing 5 from the vent holes 52a to 52c.

  The housing 1 accommodates the electric component 3 therein, and therefore, unlike the auxiliary housing 5, it has a structure in which entry of rain water or the like to the inside is as unlikely as possible. The inside of the housing 1 and the inside of the auxiliary housing 5 are partitioned by the back plate 19 (see FIG. 5A) of the housing 1, a heat sink 39, etc. It is appropriately prevented that the water which infiltrated in 5 infiltrates in the housing | casing 1 further.

In FIG. 2, the front cover 2 is formed, for example, by applying a resin coating or the like to a metal press-formed product, and a plurality of screw bodies 90 such as screws (in the present invention) (Corresponding to one example of the fastening member). More specifically, a rectangular frame-shaped flange portion 11 having a cross-sectional shape standing up from the outer surface of the housing 1 is provided on the front surface portion of the housing 1. The front cover 2 opposes the front surface of the flange 11 so as to sandwich the waterproof packing 98 between the outer peripheral edge of the front cover 2 and the flange 11, and the screw 90 is used for the flange 11 It is concluded. The packing 98 does not correspond to the elastic force generation member in the present invention.

  A frame-like bent piece 20 bent so as to protrude rearward of the front cover 2 is provided on the entire circumference or substantially the entire circumference of the outer periphery of the front cover 2, and the bent piece 20 Are set so as to fit on the flange portion 11 (see FIG. 5A). The bent piece 20 covers the entire periphery of the portion where the housing 1 and the front cover 2 abut via the packing 98, and plays a role of making it difficult for rainwater and the like to enter the housing 1. A portion of the flange portion 11 that is located at the top of the housing 1 and extends in the lateral width direction is an upward projecting portion 11 a. On the other hand, the upper bent piece 20a of the bent piece 20 of the front cover 2 is located on the upper side of the upper end of the upward protruding portion 11a, and can be engaged with the upward protruding portion 11a.

  The insulating sheet 4 is intended to provide insulation protection for the electrical component 3 and is made of resin having electrical insulation, and is attached to the housing 1 so as to cover the front side of the electrical component 3. A bracket 18 or the like provided with a screw hole for screwing and mounting a screw body 91 used for attaching the insulating sheet 4 is provided at an appropriate place in the housing 1 (see FIGS. 5 and 6). . On the other hand, as the electric component 3 accommodated in the housing 1, there is one that constitutes the display unit 30 for displaying the operating condition of the power conditioner A. The display unit 30 is configured using, for example, an 8-segment display 3 (3a), an LED lamp 3 (3b), and the like (see FIGS. 2 to 4). As display items of the display unit 30, for example, display of the electric power KW and electric energy KWh of power generation, display of on / off such as interconnection, independence, suppression, etc. are performed. The insulating sheet 4 is provided so as not to cover the front side of the display unit 30. In the front cover 2, at a portion corresponding to the front of the display unit 30, a see-through window 21 configured using a transparent member is provided. The display on the display unit 30 is visible from the front of the front cover 2 through the see-through window 21.

  The elastic member 6 is, for example, an elongated block made of a foamed resin or rubber and can be compressed and deformed with an elastic restoring force. The elastic member 6 is adhered to the upper side of the display unit 30 in the insulating sheet 4 and protrudes forward from the insulating sheet 4, and is in the shape of a bowl located on the upper side of the display unit 30. The length in the left-right width direction of the insulating sheet 4 is equal to or greater than the length in the left-right width direction of the entire display unit 30. In the illustrated configuration, the length of the insulating sheet 4 is substantially longer than that of the display unit 30.

  As shown in FIG. 5A, in a state in which the front cover 2 is attached to the housing 1, the elastic member 6 is located in the housing space portion in the housing 1 and the front cover 2, and It abuts against the inner surface and compresses. Although a frame 17 (internal frame) for attaching the electric component 3 and other electric components 3 constituting the display unit 30 is assembled to the housing 1, a part 17 a of the frame 17 is the same as that of the housing 1. It is bent to project forward, and is set so as to abut on the back surface of the insulating sheet 4 where the elastic member 6 is attached. As a result, movement of the elastic member 6 to the rear of the housing 1 is restricted.

  As well illustrated in FIG. 6, among the plurality of electrical components 3, some of the electrical components 3 such as the electrical component 3 constituting the display unit 30 and the other electrical components 3 (3 c) other than this are: It is provided in a state where it protrudes from the front opening 10 of the housing 1 in the front thereof by an appropriate dimension (maximum projecting dimension La). This makes it possible to space-efficiently incorporate the electric component 3 into the housing 1 while suppressing an increase in size of the housing 1. On the other hand, a portion close to the center in the vertical height direction of the front cover 2 is a bulging portion 22 which bulges forward by an appropriate dimension Lb than the upper edge or lower edge of the front cover 2. And the electrical component 3 are not to interfere unduly. The elastic member 6 is configured to abut on the inner side surface of the bulging portion 22 of the front cover 2.

  Next, the operation of the above-described power conditioner A will be described.

First, as shown in FIG. 5A, in a normal state where the front cover 2 is attached to the housing 1, the elastic member 6 is in a state of being compressed by the front cover 2. Therefore, when the screw body 90 is removed, a portion of the front cover 2 in contact with the elastic member 6 is moved forward by the elastic force F of the elastic member 6, as shown in FIG. It is pushed. Here, since the pressing position by the elastic force F is a position lower than the engagement point between the upper bent piece 20a and the upward protruding portion 11a , the upper bent piece 20a moves to the front side of the upward protruding portion 11a It is possible to properly maintain the engagement between the upper bent piece 20a and the upward projection 11a.

When the screw body 90 is removed, the packing 98 elastically restores, and there is a possibility of exerting a force to press the whole front cover 2 forward, but the pressing force F of the elastic member 6 is the elastic restoration of the packing 98 This prevents the entire front cover 2 from being pushed forward as it is by the force, and produces an effect of appropriately maintaining the engagement between the upper portion of the upper bending piece 20a and the upward projecting portion 11a.
Because of this, it is possible to eliminate or reduce the possibility that the operator may drop the front cover 2 during maintenance of the power conditioner A or the like. As a result, it is possible to preferably solve the problem that the front cover 2 is damaged and the dropped front cover 2 hits the electric component 3 and the electric component 3 is damaged.

  The elastic member 6 also plays a role of protecting the display unit 30. Specifically, as described above, since the elastic member 6 is provided in the shape of a bowl located on the upper side of the display unit 30, temporarily, rainwater infiltrates the upper portion in the housing 1, and this rainwater Even if the rainwater falls downward along the surface of the insulating sheet 4, this rainwater can be blocked by the elastic member 6 and can not reach the front surface portion of the display unit 30. Therefore, the display unit 30 is protected. The rainwater reaching the elastic member 6 flows laterally on the upper surface of the elastic member 6 and flows downward from the longitudinal end of the elastic member 6 along the surface of the insulating sheet 4 and the other electrical components 3 are also wetted. It is not supposed to.

  In addition, since the elastic member 6 is in contact with the bulging portion 22 of the front cover 2, the bulging portion 22 is supported (reinforced) by the elastic member 6. This serves to prevent the bulging portion 22 from being deformed so as to be pushed into the housing 1 when it is pushed by the worker.

  FIG. 7 shows another embodiment of the present invention. In the figure, the same or similar elements as or to those of the embodiment are denoted by the same reference numerals as those of the embodiment.

  In the embodiment shown in FIG. 7, the elastic member 6 is attached to the front cover 2. Even with such a configuration, when the front cover 2 is attached to the housing 1, the elastic member 6 is compressed and deformed in the housing space portion in the housing 1 and the front cover 2, and the function intended by the present invention It is possible to get

  The present invention is not limited to the contents of the embodiments described above. The specific configuration of each part of the electric device according to the present invention can be variously designed and changed within the intended scope of the present invention.

The electric device in the present invention is a device in which an electric component is housed in a housing, and is not limited to the power conditioner. The invention is suitable for wall mounted electrical devices for outdoor installation, but
The present invention can be applied to other indoor electric devices and other electric devices other than the wall type.

  Instead of being attached to the insulating sheet 4, the elastic member 6 may be attached to, for example, a frame for supporting an electric component or a rigid electric component. As the elastic force generation member in the present invention, for example, a metal spring or the like may be used instead of the foamed resin or rubber or the like as the elastic member 6 described above. Although it is preferable to use the elastic member 6 as a weir for protecting the display unit 30 as in the embodiment described above, the elastic member 6 may not be provided in such a mode. In the case where the display unit 30 is protected by the elastic member 6, instead of providing the elastic member 6 only on the upper side of the display unit 30, the entire circumference or substantially the entire periphery (upper, side, lower, etc.) of the display unit 30. It may be configured to surround the circumference.

The housing may have a front opening, and may have a configuration in which an upward protrusion is provided on the upper part of the front portion. The upward projecting portion does not necessarily have to be elongated in the lateral width direction of the housing. For example, the upward projecting portion may have a small lateral width and may be provided at a plurality of locations.
The front cover is configured to be attached to the front surface of the housing using a fastening member so as to close the front opening of the housing, and is positioned above the upward projection of the housing and engaged with the upward projection It is sufficient if it has a configuration having a compatible upper bent piece. Similarly to the upward projecting portion of the housing, the upper bent piece portion may not be extended in the lateral width direction as well, and may have a smaller width.
The fastening member in the present invention is not limited to a screw body such as a screw, and may be any one that can fasten the front cover and the housing.

A Power conditioner (electric equipment)
REFERENCE SIGNS LIST 1 housing 10 front opening 11 a upward projection 17 frame 2 front cover 20 a upper bent piece 21 perspective window 22 bulging part 3 electrical component 30 display 4 insulating sheet 6 elastic member (elastic force generating member)
90 Screw body (fastening member)

Claims (6)

A housing having a front opening and containing an electrical component therein;
A front cover attached using a plurality of fastening members to upper and lower portions of a front surface of the housing so as to close the front opening;
An electrical device, comprising
An upward projecting portion provided on an upper portion of a front part of the housing;
An upper bending piece provided on the front cover so as to bend from the upper end portion of the front cover toward the rear of the housing and located on the upper side of the upward projecting portion and engageable with the upward projecting portion When,
When the front cover is attached to the housing, the front cover is compressed by the front cover in the housing and the housing space in the front cover, and is lower than the upper bending piece of the front cover. A resilient force generating member capable of causing a resilient force to press the portion of the housing toward the front of the housing;
An electrical device further comprising: An electrical device according to claim 1, wherein
It further comprises an insulating sheet covering the front side of the electrical components attached to the housing and housed in the housing,
The electric device, wherein the elastic force generating member is an elastic member attached to a front surface of the insulating sheet. An electrical device according to claim 2, wherein
Examples of the electrical components accommodated in the housing include electrical components constituting a display unit for displaying the operating status of the electrical device,
The insulating sheet is provided so as not to cover the front of the display unit, and the front cover is provided with a see-through window, so that the display unit can be viewed from the front of the front cover via the see-through window. It is considered to be visible from
The said elastic member is an electric apparatus provided in the state which is located in the upper side of the said display part, and protrudes in the front from the said insulation sheet. An electric device according to claim 2 or 3, wherein
In the housing, at least one frame used to mount the electrical component is incorporated;
The electric device includes, as the frame, a frame capable of restricting the elastic member from moving rearward by coming into contact with the rear surface portion of the portion to which the elastic member is attached in the insulating sheet. . An electrical device according to any one of the preceding claims, wherein
The electrical component is provided with at least a portion thereof protruding forward from the front opening of the housing,
The front cover has a bulging portion that bulges forward relative to other portions of the front cover so as to avoid interference with the protruding portion of the electric component.
The electric device, wherein the elastic force generation member is provided to abut on the bulging portion. The electrical device according to any one of claims 1 to 5, wherein
Electrical equipment, the whole equipment being configured as a wall mounted power conditioner for outdoor installation.

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