JP2011064339A - Electric component box - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric component box enhanced in heat release efficiency with respect to a heat generation amount of the entire electric component box compared to a conventional box. <P>SOLUTION: The electric component box 1 includes: a casing 10 storing electric components; a partition wall 11 partitioning an internal space of the casing 10 into a first space S1 for storing first electric components and a second space S2 for storing second electric components having larger heat generation amounts than those of the first electric components; an air supply port 12 supplying heat releasing air to the first space S1 and the second space S2; and an air exhaust port 13 discharging the heat releasing air. The electric component box further includes a partition member 14 partitioning the air exhaust port 13 side of the first space S1. The amount of the heat releasing air made to flow in to the first space S1 side is restricted by the partition member 14 to increase the amount of the heat releasing air made to flow in to the second space S2 side, thus improving the circulation efficiency of the heat releasing air at the second space S2 side. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an electrical component box that accommodates electrical components.

  A technique is known in which electrical components such as a control board, an inverter board, and a reactor are accommodated in an electrical component box and attached to an outdoor unit included in an air conditioner or the like. (For example, the following patent document 1)

  As shown in FIG. 4, the conventional electrical component box 4 includes a first space S1 and a first space S1 in an internal space of a housing 40 including a container 48 having an opening and a lid 49 that opens and closes the opening. A partition wall 41 is provided to be separated from the two spaces S2. A control board 42 and a terminal block 43 are arranged on the first space S1 side, and a reactor 44, an inverter board 45, and a fan driver board 46 are arranged on the second space S2 side. An opening O1 is formed on the lower surface on the first space S1 side of the housing 40, an opening O2 is formed on the lower surface on the second space S2 side, and an exhaust port 47 is provided on the upper surface side on the first space S1 side. . Radiating air for radiating heat generated from the electrical components flows into the housing 40 from both the openings O1 and O2, and is discharged from the exhaust port 47 to the outside of the housing 40. A wiring 50 connected to a terminal (not shown) provided outside the electrical component box is connected to a terminal (not shown) provided on the terminal block 43 accommodated on the first space S1 side through the opening O1. Yes.

  In order to efficiently dissipate the heat generated from the electrical components housed in the electrical component box 4, it is preferable to efficiently circulate the radiated air inside the housing 40 and discharge it to the outside. The electrical components such as the reactor 44, the inverter board 45, and the fan driver board 46 arranged on the second space S2 side generate a larger amount of heat than the control board 42 and the terminal block 43 arranged on the first space S1 side. For this reason, in order to efficiently radiate heat on the second space S2 side, it is necessary to circulate more radiated air more efficiently than on the first space S1 side. The electrical component box 4 is provided with an opening O2 in order to efficiently flow the radiated air into the second space S2 side separated from the first space S1 side by the partition wall 41.

  However, as shown in FIG. 5, the electrical component box 4 has the opening O <b> 2 formed in a plurality of slit shapes, and the area is smaller than the opening O <b> 1. For this reason, there is little quantity of the radiating air which flows into the 2nd space S2 side, and it is difficult to ensure sufficient quantity of radiating air for performing heat dissipation. (See dotted arrow in Fig. 4)

  Further, the electrical component box 4 has an exhaust port 47 provided on the front side of the housing 40. For this reason, most of the radiated air flowing into the internal space of the housing 40 is discharged from the exhaust port 47 through the first space S1, and the radiated air cannot be circulated efficiently on the second space S2 side. . (Refer to the solid arrows in Fig. 4)

  As described above, in the electrical component box 4, the circulation efficiency of the radiated air on the first space S1 side is higher than the circulation efficiency of the radiated air on the second space S2 side. For this reason, the heat dissipation efficiency with respect to the emitted-heat amount of the whole electrical component is not good.

JP 2007-218534 A

  The objective of this invention is providing the electrical component box which improved the thermal radiation efficiency with respect to the emitted-heat amount of the whole electrical component compared with the past.

  The electrical component box of the present invention includes a housing that houses electrical components, an internal space of the housing, a first space that houses the first electrical components, and a second electrical component that generates a larger amount of heat than the first electrical components. An electrical component box comprising: a partition wall that is separated from the second space to be accommodated; an air supply port that supplies the radiated air to the first space and the second space; and an exhaust port that exhausts the radiated air. A partition member for partitioning the exhaust port side of one space is provided.

  The electrical component box of the present invention is characterized in that the partition wall and the partition member are integrally formed.

  The electrical component box of the present invention is characterized in that the first space and the second space communicate with each other on the air supply port side.

  The electrical component box of the present invention is characterized in that the air supply port is a wiring lead-in port.

  The electrical component box of the present invention is characterized in that a part of the casing constituting the first space is formed to be openable and closable.

  According to the electrical component box of the present invention, by providing the partition member that partitions the exhaust port side of the first space, the amount of radiated air flowing into the first space side is limited and flows into the second space side. The flow of the heat radiation air can be increased. Thereby, since more radiating air can be supplied to the 2nd space side and the circulation efficiency of the radiating air of the 2nd space side can be improved, the radiating efficiency with respect to the emitted-heat amount of the whole electrical equipment can be improved.

  Since the partition wall and the partition member can be formed integrally, the number of components and the number of steps required for assembly can be reduced. Thereby, manufacturing cost can be reduced.

  Since the first space and the second space communicate with each other on the air supply port side, the inflow of radiated air by natural convection from the first space side to the second space side can be promoted. Thereby, the circulation efficiency and heat dissipation efficiency of the radiating air in both spaces can be enhanced.

  Since wiring is drawn from the air supply port, there is no need to provide a separate wiring drawing port. Thereby, since the number of openings provided in the electrical component box can be minimized, the risk of moisture entering the interior of the electrical component box can be reduced.

  Since a part of the housing constituting the first space is formed to be openable and closable, the electrical components that have relatively many maintenance opportunities are arranged on the first space side, so that the maintenance can be easily performed. be able to.

It is a schematic diagram which shows the cross section of the electrical component box of this embodiment. It is a schematic diagram which shows the cross section of the electrical component box which concerns on other embodiment. It is a schematic diagram which shows the cross section of the electrical component box which concerns on other embodiment. It is a schematic diagram which shows the cross section of the conventional electrical component box. It is a schematic diagram which shows the lower surface of the conventional electrical component box.

  Hereinafter, embodiments of an electrical component box according to the present invention will be described with reference to the drawings. The drawings are shown schematically and may differ from the actual product. In the present specification, the same members are denoted by the same reference numerals. 4, the directions of the top surface, the bottom surface, the front surface, and the back surface of the electrical component box 4 indicated by the thin line arrows shown at the top of the electrical component box 4 are the same in FIGS. 1 to 3.

  As shown in FIG. 1, an electrical component box 1 of the present embodiment includes a housing 10 that houses electrical components, an internal space of the housing 10, a first space S1 that houses first electrical components, and a first The partition wall 11 that is separated from the second space S2 that houses the second electrical component that generates a larger amount of heat than the electrical component, the air supply port 12 that supplies the radiated air to the first space S1 and the second space S2, and the radiated air The electrical component box 1 is provided with an exhaust port 13 for exhausting, and is characterized in that a partition member 14 for partitioning the exhaust port 13 side of the first space S1 is provided. In FIG. 1, the first electrical component refers to the control board 42 and the terminal block 43, and the second electrical component refers to the reactor 44, the inverter substrate 45, and the fan driver substrate 46. The electrical component is a general term for the first electrical component and the second electrical component. By limiting the amount of the radiating air flowing into the first space S1 side by the partition member 14 and increasing the amount of the radiating air flowing into the second space S2, the circulation efficiency of the radiating air on the second space S2 side is increased. Increase.

  The housing | casing 10 is a box which has the space which accommodates an electrical component. The shape of the housing 10 is preferably a rectangular parallelepiped, but is arbitrary. The size of the housing 10 is appropriately designed depending on the size of the outdoor unit to be attached, the size of electrical components to be accommodated, and the like. The material of the housing 10 is preferably made of metal, but other materials may be used. The housing 10 of this embodiment includes a container 18 having an opening and a lid 19 that opens and closes the opening.

  The partition wall 11 is a thin plate member provided between the first space S1 and the second space S2. The partition wall 11 may be a member that blocks between the first space and the second space, but the place where the electrical component is disposed is preferably planar. The shape and size of the partition wall 11 are appropriately designed according to the shape and size of the housing 10. The material of the partition wall 11 is preferably made of metal, but other materials may be used.

  The air supply port 12 is provided to supply the radiated air to both the first space S1 side and the second space S2 side. The air supply port 12 is preferably provided on the lower surface of the electrical component box 1, but is not limited thereto. For example, you may provide in the lower surface side surface of the electrical component box 1. FIG. The shape and size of the air supply port 12 are appropriately designed so that sufficient radiated air for radiating heat can be supplied to both the spaces. When the opening of the container 18 is closed by the lid 19, the air supply port 12 of the present embodiment has an opening edge of the container 18 that is configured lower than the other parts, and a lid 19 that opposes the opening edge. A rectangular opening formed between them is provided on the lower surface of the electrical component box 1.

  The exhaust port 13 is provided for discharging the radiated air to the outside of the housing 10. The radiating air is preferably provided on the upper surface side of the electrical component box 1 because the radiated air rises by absorbing heat generated from the electrical component. The exhaust port 13 of the present embodiment has a rectangular opening formed between the step 191 formed in the lid 19 and the container 18 when the opening of the container 18 is closed by the lid 19. Is provided on the front surface on the upper surface side of the electrical component box 1. Thereby, the danger that moisture will enter the inside of the housing 10 is reduced.

  The partition member 14 is a thin plate member provided between the partition wall 11 and the lid 19 and is configured to partition the exhaust space 13 side of the first space S1. The partition member 14 is provided to limit the amount of the radiating air flowing into the first space S1 side. Therefore, the partition member 14 does not need to completely seal the exhaust port 13 side of the first space S1. For example, the structure which has the clearance gap not shown between the partition member 14 and the cover body 19 or the partition 11 may be sufficient. The material of the partition member 14 is preferably made of metal, but other materials may be used.

  In addition, you may form the partition 11 mentioned above and the partition member 14 integrally. For example, the partition wall 11 and the partition member 14 may be connected by welding or the like, or the thin plate member may be bent. Thereby, since the number of components and the number of steps required for assembly can be reduced, the manufacturing cost can be reduced.

  In the electrical component box 1 of the present embodiment, the first space S1 and the second space S2 communicate with each other on the air supply port 12 side. As shown in FIG. 1, a communication portion 15 is provided between the lower end portion 111 of the partition wall 11 and the lower surface of the housing 10. The communication portion 15 may be provided in a part between the lower end portion 111 of the partition wall 11 and the lower surface of the housing 10, and the entire space between the lower end portion 111 of the partition wall 11 and the lower surface of the housing 10 is opened. It may be.

  The wiring 50 is used to connect a terminal (not shown) provided outside the electrical component box 1 and a terminal (not shown) provided on the terminal block 43 accommodated on the first space S1 side. Although the wiring inlet for drawing the wiring 50 in the inside of the housing | casing 10 is required, as for the electrical component box 1 of this embodiment, the air supply inlet 12 is a wiring inlet.

  Further, in the electrical component box 1 of the present embodiment, a part of the housing 10 constituting the first space S1 is formed to be openable and closable. As shown in FIG. 1, the housing 10 includes a container 18 having an opening and a lid 19 that opens and closes the opening. As for the opening provided in the container 18, the front side of the electrical component box 1 may be opened over substantially the entire surface, or only a part of the front side of the electrical component box 1 may be opened. The lid 19 may be attached to and detached from the container 18 by screwing or the like, or may be opened and closed while being fixed to a part of the container 18 by a hinge or the like. The size of the opening provided in the container 18 and the configuration of the lid 19 can be appropriately designed according to the size and arrangement of the electrical components to be accommodated.

  Next, the effect | action of the electrical component box 1 of this embodiment is demonstrated using FIG. In addition, the solid line arrow and dotted line arrow which are shown in FIG. 1 show the flow of the radiating air, and the solid line arrow means that the flow rate of the radiating air is larger than the dotted line arrow.

  When an outdoor unit (not shown) provided with the electrical component box 1 is operated, the electrical component accommodated in the electrical component box 1 generates heat. As described above, the second electrical component (reactor 44, inverter) accommodated in the second space S2 side rather than the heat generation amount of the first electrical component (control board 42, terminal block 43) accommodated in the first space S1 side. The amount of heat generated by the board 45 and the fan driver board 46) is larger. Therefore, the temperature on the second space S2 side is higher than that on the first space S1 side. The radiating air for radiating the heat generated from the electrical component flows into the internal space of the housing 10 from the air supply port 12. The inflowing radiated air is supplied to both the first space S1 side and the second space S2 side.

  The radiating air that has flowed into the first space S <b> 1 side is blocked from rising by the partition member 14. Some of the radiated air flows into the second space S2 by natural convection, but most of the radiated air stays in the first space S1. Over time, the density of the radiating air on the first space S1 side becomes saturated, and the inflow of the radiating air to the first space S1 side is restricted. The heat generated in the first space S1 can be radiated by being transferred to the casing 10 (the lid body 19 in the present embodiment) through the staying radiating air. Therefore, on the first space S1 side, it is possible to radiate heat without efficiently circulating the radiating air.

  On the other hand, the radiating air flowing into the second space S2 side rises by absorbing heat generated in the second space S2. The raised radiated air is discharged to the outside of the housing 10 through the exhaust port 13. The second space S2 has a higher temperature than the first space S1, but is sufficient to radiate heat since the radiated air that is restricted from flowing into the first space S1 can flow into the second space S2. A sufficient amount of the radiating air can be secured. Further, since the radiating air circulates efficiently in the second space S2, heat can be radiated efficiently.

  Since the conventional electrical component box 4 has higher circulation efficiency of the radiated air on the first space S1 side than the circulated efficiency of the radiated air on the second space S2 side, the heat dissipation efficiency with respect to the heat generation amount of the entire electrical component is not good. In contrast, the electrical component box 1 of the present embodiment has a configuration in which the circulation efficiency of the radiated air on the second space S2 side is higher than the circulation efficiency of the radiated air on the first space S1 side. Therefore, according to the electrical component box 1 of the present embodiment, more radiated air is supplied to the second space S2 side in which the second electrical component having a larger calorific value than the first electrical component is accommodated, and Since the circulation efficiency of the radiating air on the second space S2 side can be increased, the radiating efficiency with respect to the heat generation amount of the entire electrical component can be increased.

  Moreover, according to the electrical component box 1 of the present embodiment, the first space S1 and the second space S2 communicate with each other on the air supply port 12 side, and thus the first space S1 side to the second space S2 side. The inflow of the heat radiation air by natural convection can be promoted. Thereby, the circulation efficiency and heat dissipation efficiency of the radiating air in both spaces can be enhanced.

  Moreover, according to the electrical component box 1 of this embodiment, since the wiring 50 is drawn from the air supply port 12, it is not necessary to provide a wiring drawing port separately. In order to connect the terminal (not shown) provided outside the electrical component box 1 and the terminal (not shown) provided on the terminal block 43 accommodated on the first space S1 side by the wiring 50, the wiring 50 A wiring lead-in port for drawing the wire into the housing 10 is necessary. However, since the outdoor unit is often installed outdoors and is expected to be exposed to rain, it is preferable that the number of openings provided in the electrical component box 1 be the minimum necessary. This is because there is an increased risk that moisture such as rainwater will enter the electrical component box 1. According to the electrical component box 1 of the present embodiment, since the number of openings provided in the housing 10 can be minimized, the risk of moisture entering the electrical component box 1 is reduced. Can do.

  Moreover, according to the electrical component box 1 of the present embodiment, since a part of the housing 10 constituting the first space S1 is formed to be openable and closable, the electrical component that has a relatively large number of maintenance opportunities is provided. By arranging it on the one space S1 side, these maintenances can be easily performed. That is, the control board 42 and the terminal block 43 can be easily accessed simply by opening the lid 19, and the lid 19 may be closed when the maintenance is completed. Thus, since no disassembling work or the like is required for performing maintenance, the maintenance is easy and the working time can be shortened.

  As mentioned above, although the electrical component box 1 of this embodiment was demonstrated, the electrical component box of this invention can be implemented with another form.

  For example, as shown in FIG. 2, the electrical component box of the present invention is characterized in that a partition member 21 having a diaphragm opening 211 at an arbitrary position is provided instead of the partition member 14 shown in FIG. The electrical component box 2 may be used. In FIG. 2, the arrows indicating the flow of the radiating air shown in FIG. 1 are omitted. In the electrical component box 2 shown in FIG. 2, the description of the components having the same reference numerals as those of the electrical component box 1 described above is omitted.

  The partition member 21 is a thin plate member having the same characteristics as the partition member 14 described above except that the diaphragm opening 211 is provided. The aperture opening 211 communicates with the exhaust port 13 through the second space S2. A portion of the radiated air that has risen by absorbing the heat generated on the first space S1 side moves to the second space through the throttle opening 211 (see the dotted line arrow in FIG. 2), and from the exhaust port 13 to the housing 10 It is discharged outside.

  The partition member 21 only needs to be able to limit the amount of the radiating air flowing into the first space S1 side. Therefore, the size of the aperture opening 211 is preferably small enough to limit the amount of radiated air flowing into the first space S1. In other words, the circulation efficiency of the radiated air on the first space S1 side must be large enough not to be higher than the circulatory efficiency of the radiated air on the second space S2 side.

  According to the electrical component box 2 of this embodiment, the radiated air that has risen by absorbing the heat generated on the first space S1 side can be efficiently discharged to the outside of the housing 10. Thereby, the thermal radiation efficiency by the side of 1st space can be improved. On the other hand, by employing the partition member 21, the heat radiation efficiency itself on the second space S2 side is not significantly reduced. Therefore, the heat radiation efficiency with respect to the heat generation amount of the entire electrical component can be further increased.

  As shown in FIG. 3, the electrical component box according to the present invention includes a container 38 having an opening and a lid 39 that opens and closes the opening, instead of the housing 10 shown in FIG. In the housing 30, the electrical component box 3 may be characterized in that the lid body 39 includes a diaphragm opening 391 in the vicinity of the partition member 14. In FIG. 3, as in FIG. 2 described above, the arrows indicating the flow of the radiated air shown in FIG. 1 are omitted. In the electrical component box 3 shown in FIG. 3, the description of the components having the same reference numerals as those of the electrical component box 1 described above is omitted.

  The aperture opening 391 communicates with the outside of the housing 30. A part of the radiated air that has risen by absorbing the heat generated on the first space S1 side is discharged to the outside of the housing 10 through the throttle opening 391. (See the dotted arrow in FIG. 3) Like the aperture opening 211 described above, the size of the aperture opening 391 is preferably small enough to limit the amount of radiated air flowing into the first space S1. In other words, the circulation efficiency of the radiated air on the first space S1 side must be large enough not to be higher than the circulatory efficiency of the radiated air on the second space S2 side. Also in the electrical component box 3 according to this embodiment, the same effects as those of the electrical component box 2 described above can be obtained.

  It should be noted that the present invention can be implemented in a mode in which various improvements, modifications, or variations are added based on the knowledge of those skilled in the art without departing from the spirit of the present invention. Moreover, you may implement with the form which substituted any invention specific matter to the other technique within the range which the same effect | action or effect produces.

1, 2, 3, 4 ... Electrical component box 10, 30, 40 ... Housing, 11, 41 ... Bulkhead, 12 ... Air supply port, 13, 47 ... Exhaust port, 14, 21 ... Partition member, 15 ... Communication , 18, 38, 48 ... container, 19, 39, 49 ... lid, 42 ... control board, 43 ... terminal block, 44 ... reactor, 45 ... inverter board, 46 ... fan driver board, 50 ... wiring, 111 ... Lower end of partition wall, 191... Step, 211, 391... Aperture opening, S1... First space, S2 .. second space, O1, O2.

Claims (5)

A housing for housing electrical components;
A partition wall that divides the internal space of the housing into a first space that houses a first electrical component and a second space that houses a second electrical component that generates a larger amount of heat than the first electrical component,
An air supply port for supplying radiated air to the first space and the second space;
An electrical component box provided with an exhaust port for exhausting the radiating air,
An electrical component box provided with a partition member for partitioning the exhaust port side of the first space.   The electrical component box according to claim 1, wherein the partition wall and the partition member are integrally formed.   The electrical component box according to claim 1, wherein the first space and the second space communicate with each other on the air supply port side.   The electrical component box according to claim 1, wherein the air supply port is a wiring lead-in port. The electrical component box according to any one of claims 1 to 4, wherein a part of the casing constituting the first space is formed to be openable and closable.

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