Electrical equipment box and ventilation system

Abstract

To take measures against intrusion of water falling to an electric component box.SOLUTION: A body box (110) comprises a first surface (F1), and a first partition plate (115b) for separating the inside of the body box (110) into a storage space (S0) and a first space (S1). Introduction ports (H3 and H6) for introducing air on the outside of the body box (110) into the first surface (F1), and a first opening (H1) for discharging air within the storage space (S0) outward by a fan (140) are formed on a surface except the first surface (F1) of the body box (110). A second opening (H2) is formed on the first partition plate (115b).SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present disclosure relates to an electrical component box and a ventilation device. [Background technology]

[0002] There is known a ventilation device that exchanges heat between exhaust indoor air and supply outdoor air (see, for example, Patent Document 1). Such a ventilation device is provided with an electrical equipment box. In the electrical equipment box, for example, a drive circuit unit for an intake fan and a drive circuit unit for an exhaust fan are provided. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2014-178083 A Summary of the Invention [Problem to be solved by the invention]

[0004] Depending on the environment in which the ventilation system is installed, it may be exposed to falling water droplets. It is important to take measures to prevent the ingress of falling water into the electrical equipment box of the ventilation system.

[0005] An object of the present disclosure is to provide a measure to prevent the ingress of falling water into an electrical component box. [Means for solving the problem]

[0006] A first aspect of the present disclosure includes a heat generating device including a first heat generating component (120a, 120b), a fan (140), and a main body box (110), The main body box (110) is The first side (F1), a first partition plate (115b) that divides the inside of the main body box (110) into an accommodation space (S0) that accommodates the first heat generating components (120a, 120b) and the fan (140) and a first space (S1) facing the first surface (F1); Equipped with Inlets (H3, H6) for introducing air outside the main body box (110) into the first space (S1) and a first opening (H1) for discharging air within the storage space (S0) to the outside by the fan (140) are formed on a surface of the main body box (110) other than the first surface (F1), A second opening (H2) is formed in the first partition plate (115b). It is an electrical equipment box.

[0007] In the first aspect, the inlets (H3, H6) are formed on a surface other than the first surface (F1). With this configuration, when the electrical component box is placed with the first surface (F1) facing up, it is possible to prevent falling water from entering the electrical component box through the inlets (H3, H6).

[0008] A second aspect of the present disclosure is the electrical component box of the first aspect, The main body box (110) is a plurality of side surfaces (F2, F3) different from the first surface (F1) extending in the up-down direction when the main body box (110) is installed; a second partition plate (115a) that divides the inside of the main body box (110) into the storage space (S0) and a second space (S2) facing at least some of the side surfaces (F2, F3); Equipped with The first space (S1) and the second space (S2) are in communication with each other, The inlet (H3, H6) is formed in at least a part of the plurality of side surfaces (F2, F3) that constitute the second space (S2). It is an electrical equipment box.

[0009] In the second aspect, air outside the electrical component box is taken into the interior of the electrical component box through the second space (S2). In this aspect, since the inlets (H3, H6) are formed on the side surfaces (F2, F3), it is possible to prevent falling water from entering the electrical component box through the inlets (H3, H6).

[0010] A third aspect of the present disclosure is the electrical component box of the second aspect, A second heat generating component (130b) and a heat sink (130a), The heat sink (130a) dissipates heat from the second heat generating component (130b) to the second space (S2). It is an electrical equipment box.

[0011] In the third aspect, the second heat generating component (130b) dissipates heat to the air through the heat sink (130a). In this aspect, the heat sink (130a) can be efficiently cooled by the air flow in the second space (S2).

[0012] A fourth aspect of the present disclosure is the electrical component box of the third aspect, a third partition plate (116) that divides the accommodation space (S0) into a first area (A1) in which the first heat generating component (120a, 120b) is accommodated and a second area (A2) in which the second heat generating component (130b) is accommodated; The second opening (H2) opens into the first region (A1), The fan (140) is provided in the first area (A1). It is an electrical equipment box.

[0013] In the fourth aspect, an area is divided into an area in which electronic components to be cooled by air from the fan (140) are arranged and an area in which electronic components to be cooled by the heat sink (130a) are arranged. In this aspect, this division allows the cooling air to be efficiently introduced into the first area (A1). As a result, in this aspect, the heat-generating components (120a, 120b, 130b) can be efficiently cooled.

[0014] A fifth aspect of the present disclosure is a ventilation device including the electrical component box according to any one of the first to fourth aspects.

[0015] In the fifth aspect, the ventilation device can exhibit the effects provided by the electrical component box (100) in any one of the first to fourth aspects. [Brief description of the drawings]

[0016] [Figure 1] FIG. 1 shows a schematic configuration of a ventilation device. [Diagram 2]FIG. 2 is a perspective view of the electrical component box. [Diagram 3] FIG. 3 is a perspective view that illustrates a schematic structure of the storage section. [Figure 4] FIG. 4 is a perspective view of the top cover. [Diagram 5] FIG. 5 is a vertical cross-sectional view showing a schematic internal structure of the main body box. [Figure 6] FIG. 6 is a perspective view of the rear cover. [Figure 7] FIG. 7 is a perspective view of the lower cover. [Figure 8] FIG. 8 is a side view of the inverter circuit board. [Figure 9] FIG. 9 is a schematic diagram showing a cross-sectional structure of an electrical component box according to the second embodiment. [Figure 10] FIG. 10 is a perspective view illustrating a schematic structure of an upper cover in the second embodiment. [Figure 11] FIG. 11 is a schematic diagram showing a cross-sectional structure of an electrical component box according to the third embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] First Embodiment A ventilation device (20) will be described as a first embodiment. The ventilation device (20) is intended to ventilate an indoor space. The ventilation device (20) is installed, for example, above the ceiling.

[0018] Fig. 1 shows a schematic configuration of a ventilation device (20). Fig. 1 shows the ventilation device (20) as viewed from above. In the example of Fig. 1, the ventilation device (20) is installed above the ceiling. An inspection hatch (200) is formed in the ceiling.

[0019] The ventilation device (20) includes a casing (21), an intake fan (31), an exhaust fan (32), a total heat exchanger (33), and an electrical component box (100).

[0020] The casing (21) is formed in a hollow box shape. The casing (21) is formed with an outside air port (22), an exhaust port (23), an inside air port (24), and an air supply port (25). The outside air port (22) and the exhaust port (23) each communicate with an outdoor space via a duct. The inside air port (24) and the air supply port (25) each communicate with an indoor space via a duct.

[0021] An air supply passage (26) and an exhaust passage (27) are formed inside the casing (21). The air supply passage (26) is formed from the outside air port (22) to the air supply port (25). The exhaust passage (27) is formed from the inside air port (24) to the exhaust port (23). An air supply fan (31) is disposed in the air supply passage (26). An exhaust fan (32) is disposed in the exhaust passage (27).

[0022] The supply air fan (31) and the exhaust fan (32) are formed, for example, by a sirocco fan. The supply air fan (31) and the exhaust fan (32) are configured so that their respective air volumes can be varied. The variation in air volume is achieved by supplying power to the supply air fan (31) and the exhaust fan (32) by an inverter circuit (described later).

[0023] The total heat exchanger (33) is disposed so as to straddle the air supply passage (26) and the exhaust passage (27). The total heat exchanger (33) has a first passage (34) connected to the air supply passage (26) and a second passage (35) connected to the exhaust passage (27). The total heat exchanger (33) exchanges sensible heat and latent heat between the first air flowing through the first passage (34) and the second air flowing through the second passage (35).

[0024] A service opening (21a) is formed in a side surface of the casing (21) of the ventilation device (20). During operation of the ventilation device (20), the service opening (21a) is closed with a lid (21b).

[0025] The inspection hatch (200) shown in Fig. 1 is an opening provided in the ceiling of a building. A worker can enter through the inspection hatch (200). The worker can access the service hatch (21a) from the inspection hatch (200). In other words, the worker can access the ventilation system (20) from the service hatch (21a) to perform various maintenance tasks.

[0026] 1, the electrical component box (100) is attached to the surface of the casing (21) on which the service port (21a) is provided (the side surface of the ventilator (20)). The electrical component box (100) is adjacent to the service port (21a) of the casing (21).

[0027] Fig. 2 is a perspective view of the electrical component box (100). Fig. 2 shows the electrical component box (100) with a service port cover (114) (described later) removed. The electrical component box (100) includes a main body box (110), a converter circuit board (120), two inverter circuit boards (130), and a fan (140). For ease of explanation, the up-down direction of the electrical component box (100) is defined below based on the state shown in Fig. 2.

[0028] <Main unit box (110)> The main box (110) is made of metal such as iron and has a box shape. The main box (110) includes a rear cover (111), a top cover (112), a bottom cover (113), a service port cover (114), and a storage section (115).

[0029] - Storage unit (115) - Fig. 3 is a perspective view showing a schematic structure of the storage section (115). As shown in Fig. 3, the storage section (115) is a box-shaped member having two adjacent faces that are open. The two open faces function as service openings.

[0030] A partition plate (116) (also referred to as a third partition plate) is provided in the space inside the storage section (115) (hereinafter referred to as the storage space (S0)) as shown in Fig. 2. The partition plate (116) is a plate-shaped member.

[0031] In this example, the partition plate (116) extends in the up-down direction when the electrical component box (100) is installed. The partition plate (116) divides the storage space (S0) into a first area (A1) and a second area (A2) (see FIG. 2). In this example, the partition plate (116) is provided so as to divide a portion of the storage space (S0). More specifically, the partition plate (116) is provided adjacent to two inverter circuit boards (130) (described in detail later) that are arranged side by side.

[0032] An opening (hereinafter, the second opening (H2)) is formed in the top plate (115b) (also referred to as the first partition plate) of the storage section (115). The second opening (H2) is connected to the first area (A1). Burring is applied to the periphery of the second opening (H2). Specifically, a rise is formed on the periphery of the second opening (H2) that points upward in the storage section (115) (see FIG. 3).

[0033] An opening (hereinafter, the fourth opening (H4)) is formed in the bottom plate (115c) of the storage section (115). Burring is applied to the periphery of the fourth opening (H4). Specifically, a rise is formed on the periphery of the fourth opening (H4) that faces downward of the storage section (115). The fourth opening (H4) is connected to the first area (A1). The fourth opening (H4) is also connected to a third space (S3) described below.

[0034] Two openings (hereinafter, each of which is referred to as a fifth opening (H5)) are provided in the rear plate (115a) (also referred to as a second partition plate) of the storage section (115) (see FIG. 3). These fifth openings (H5) are aligned in the vertical direction.

[0035] -Service port cover(114)- The service port cover (114) is a lid for closing the service port (see FIG. 1). The service port cover (114) is a plate-like member having an L-shaped cross section. A worker performing maintenance on the ventilation device (20) can access the inside of the main body box (110) (more specifically, the inside of the storage section (115)) by removing the service port cover (114).

[0036] -Top cover(112)- Fig. 4 is a perspective view of the top cover (112) (also called the second cover). The top cover (112) is a box-shaped member with one side open. In Fig. 4, the lower side of the top cover (112) (the side not visible in Fig. 4) is the open side.

[0037] The top cover (112) is attached to the top plate (115b) of the storage section (115) with its open surface facing the top plate (115b). Most of the open surface of the top cover (112) (described below) is covered by the top plate (115b). In Fig. 2, the surface of the top cover (112) that is the top surface of the main body box (110) is designated as the first surface (F1).

[0038] Fig. 5 is a vertical cross-sectional view showing a schematic internal structure of the main box (110). Fig. 5 is a view of the inside of the first area (A1) seen from the second area (A2) side. As shown in Fig. 5, in the main box (110), a space (called a first space (S1)) is formed between the top plate (115b) of the storage section (115) and the top cover (112). The first space (S1) faces the first surface (F1).

[0039] -Rear cover(111)- FIG. 6 is a perspective view of the rear cover (111) (also referred to as the first cover). The rear cover (111) is a box-shaped member with two open sides. The rear cover (111) is attached to the rear plate (115a) with one open side facing the rear plate (115a) of the storage section (115). Most of the open side of the rear cover (111) is covered by the rear plate (115a). The other open side of the rear cover (111) is the top side when the rear cover (111) is attached to the rear plate (115a). In this example, the upper part of the open side of the rear cover (111) is not covered by the rear plate (115a).

[0040] An outer surface of the rear cover (111) that faces the rear plate (115a) of the housing section (115) is designated as a second surface (F2) (see FIG. 5). In this example, the second surface (F2) extends vertically when the electrical component box (100) is installed. The second surface (F2) may be inclined so that an upper portion protrudes outward more than a lower portion. The second surface (F2) may be formed by utilizing a side surface of the casing (21) of the ventilation device (20).

[0041] In the main box (110), a space (hereinafter referred to as a second space (S2)) is formed between the rear plate (115a) of the storage section (115) and the rear cover (111) (see FIG. 5). The rear cover (111) and the top cover (112) are connected to each other so that the second space (S2) and the first space (S1) are connected to each other.

[0042] In this example, the top cover (112) has a portion (hereinafter referred to as a protruding portion) that protrudes from the top plate (115b) toward the rear cover (111) (see FIG. 5). An open surface of the top cover (112) that corresponds to the protruding portion is not covered by the top plate (115b).

[0043] In the electrical component box (100), the protruding portion of the top cover (112) and an upper portion of the rear cover (111) are overlapped such that the open surface corresponding to the protruding portion of the top cover (112) is connected to the open surface of the rear cover (111) that is not covered by the rear plate (115a). When the open surface corresponding to the protruding portion of the top cover (112) is connected to the open surface of the rear cover (111) that is not covered by the rear plate (115a), the second space (S2) and the first space (S1) are connected.

[0044] The rear cover (111) has a plurality of side surfaces (F3) (also referred to as third surfaces) that extend in the vertical direction when the rear cover (111) is attached to the housing portion (115). In this example, the side surfaces (F3) extend in the vertical direction when the electrical component box (100) is installed. The side surfaces (F3) may be inclined so that the upper portions are more outward than the lower portions.

[0045] As described above, the main box (110) has a plurality of side surfaces (F2, F3) different from the first surface (F1) that extend in the vertical direction when the main box (110) is installed. The second space (S2) is a space facing at least some of the plurality of side surfaces (F2, F3).

[0046] In this example, the third surface (F3) is a surface perpendicular to the second surface (F2). In the rear cover (111), at least one of the third surfaces (F3) has a plurality of slit-shaped introduction openings (hereinafter also referred to as third openings (H3)) formed therein (see FIG. 6).

[0047] Specifically, these third openings (H3) are provided toward the lower side of the third surface (F3). As a result, the third openings (H3) are provided at a position separated from the second openings (H2). By providing the third openings (H3) at a position separated from the second openings (H2), the electrical component box (100) can more reliably prevent water and dust from entering the accommodation space (S0).

[0048] -Bottom cover(113)- 7 is a perspective view of the bottom cover (113) (also referred to as the third cover). The bottom cover (113) is a box-shaped member with one open side. The bottom cover (113) is attached to the bottom plate (115c) of the storage section (115) with the open side facing the bottom plate (115c) of the storage section (115). The entire open side of the bottom cover (113) is covered by the bottom plate (115c).

[0049] In the main box (110), a space (hereinafter referred to as a third space (S3)) is formed between the bottom plate (115c) of the storage section (115) and the bottom cover (113) (see FIG. 5). Here, the surface of the bottom cover (113) which is the bottommost surface of the main box (110) in FIG. 2 is named a fourth surface (F4) (see FIGS. 5 and 7).

[0050] The bottom cover (113) has a side surface (F5) (also called a fifth surface) that extends in the vertical direction when the bottom cover (113) is attached to the storage portion (115) (see FIG. 7).

[0051] In this example, the side surface (F5) extends vertically when the electrical component box (100) is installed. The side surface (F5) of the bottom cover (113) has a plurality of slit-shaped openings (hereinafter referred to as first openings (H1)).

[0052] <Converter circuit board (120)> In the electrical component box (100), one converter circuit board (120) is disposed in the first area (A1) (see FIG. 2). A converter circuit is mounted on the converter circuit board (120). The converter circuit converts AC voltage to DC voltage and supplies the DC voltage to two inverter circuit boards (130).

[0053] The converter circuit includes a capacitor (120a) and a diode bridge circuit (120b) (see FIG. 2). These electronic components are heat-generating components (hereinafter referred to as first heat-generating components (120a, 120b)) that generate heat during operation of the converter circuit.

[0054] <Inverter circuit board (130)> 8 is a side view of the inverter circuit boards (130). An inverter circuit is mounted on each of the inverter circuit boards (130). The inverter circuit of one inverter circuit board (130) supplies power to the air supply fan (31). The inverter circuit of the other inverter circuit board (130) supplies power to the exhaust fan (32).

[0055] The inverter circuit boards (130) are disposed in the second area (A2). The two inverter circuit boards (130) are aligned vertically in the second area (A2).

[0056] Each inverter circuit includes an IPM (Intelligent Power Module). An IPM includes an IGBT (Insulated Gate Bipolar Transistor) and the like. The IPM generates heat during operation of the inverter circuit. Hereinafter, the IPM may be referred to as a second heat-generating component (130b).

[0057] Each IPM (second heat-generating component (130b)) has a heat dissipation surface that dissipates heat from the IGBTs, etc. A heat sink (130a) is attached to the heat dissipation surface of each IPM (see FIG. 8).

[0058] The heat sink (130a) has heat dissipation fins. The heat dissipation fins of the heat sink (130a) protrude into the second space (S2) (see FIG. 8) from the fifth opening (H5) (see FIG. 3). The heat dissipation fins dissipate heat from the IPM (second heat-generating component (130b)) to the air in the second space (S2).

[0059] <Fans (140)> The fan (140) is disposed in the first area (A1). More specifically, the fan (140) is disposed below the lower end of the converter circuit board (120) and at a position facing the fourth opening (H4) (see FIGS. 2 and 5). The fan (140) sends air in the first area (A1) through the fourth opening (H4) into the third space (S3).

[0060] As described above, the main body box (110) has the first surface (F1). The main body box (110) has the first partition plate (115b) that divides the inside of the main body box (110) into an accommodation space (S0) that accommodates the first heat-generating components (120a, 120b) and the fan (140) and a first space (S1) facing the first surface (F1).

[0061] An inlet (H3) for introducing air from outside the main body box (110) into the first space (S1) and a first opening (H1) for discharging air from within the storage space (S0) to the outside by the fan (140) are formed on a surface of the main body box (110) other than the first surface (F1). A second opening (H2) is formed in the first partition plate (115b).

[0062] The second partition plate (rear plate (115a)) divides the inside of the main body box (110) into a storage space (S0) and a second space (S2) facing at least some of the side surfaces (F3). The first space (S1) and the second space (S2) are in communication. The inlet (H3) is formed in at least some of the side surfaces (F3) that define the second space (S2).

[0063] <Cooling of heat-generating components> The arrows in Fig. 5 indicate the flow of air. In the electrical component box (100), when the fan (140) is operated, an air flow is formed in the first area (A1) from the second opening (H2) toward the fan (140). When the fan (140) is operated, air in the first space (S1) is drawn into the first area (A1) through the second opening (H2).

[0064] The first space (S1) and the second space (S2) are connected to each other. Therefore, when the air in the first space (S1) flows into the first area (A1), the air in the second space (S2) flows into the first space (S1).

[0065] When air moves from the second space (S2) to the first space (S1), air outside the electrical component box (100) is taken into the second space (S2) through the third opening (H3). The air (outside air) taken into the second space (S2) flows through the first space (S1) and the second opening (H2) in that order, and enters the first area (A1).

[0066] The air in the first area (A1) is exhausted into the third space (S3) through the fourth opening (H4) by the fan (140). The air in the third space (S3) is exhausted to the outside of the electrical component box (100) through the first opening (H1) formed in the bottom cover (113).

[0067] When the converter circuit operates in the electrical component box (100), the first heat-generating components (120a, 120b) generate heat. The heat of the first heat-generating components (120a, 120b) is cooled by the air flow formed in the first area (A1) as described above. The air that has cooled the first heat-generating components (120a, 120b) is discharged to the outside of the electrical component box (100) through the first opening (H1).

[0068] When the inverter circuit operates in the electrical component box (100), the second heat-generating component (130b) generates heat. In the second space (S2), there is an air flow from the third opening (H3) toward the first space (S1). In other words, air taken in from outside the electrical component box (100) flows around the heat dissipation fins of the heat sink (130a).

[0069] The heat sink (130a) dissipates heat from the second heat-generating component (130b) to the air in the second space (S2). As a result, the second heat-generating component (130b) is cooled. The air that has cooled the second heat-generating component (130b) is finally discharged to the outside of the electrical component box (100) through the first opening (H1).

[0070] Effects of this embodiment Various pipes may be installed above the ceiling in which the ventilation device (20) is installed. In the ceiling, water droplets may fall from the pipes toward the electrical component box (100) for some reason.

[0071] In the electrical component box (100), air for cooling the first heat-generating component (120a, 120b) and the second heat-generating component (130b) is taken in through the third opening (H3).

[0072] The first opening (H1) and the third opening (H3) are formed on a surface other than the first surface (F1). Specifically, the third opening (H3) is formed on the third surface (F3). The third surface (F3) is a surface that extends in the vertical direction on the rear cover (111). Falling water droplets are unlikely to hit the third surface (F3) that extends in the vertical direction. In other words, falling water droplets are unlikely to enter the third opening (H3).

[0073] The first opening (H1) is formed in the fifth surface (F5). The fifth surface (F5) is a surface that extends in the vertical direction on the bottom cover (113). Falling water droplets are unlikely to hit the fifth surface (F5) that extends in the vertical direction. In other words, water droplets falling from above the electrical component box (100) are unlikely to enter the first opening (H1).

[0074] The second opening (H2) is covered by an upper cover (112). In the electrical component box (100), water does not drop directly into the second opening (H2).

[0075] The periphery of the second opening (H2) is burred. Even if water droplets get into the first space (S1) for some reason, the raised edge of the burring can prevent water from entering the storage space (S0) from the second opening (H2).

[0076] As described above, the electrical component box (100) can prevent falling water from entering the electrical component box (100).

[0077] The ventilation device (20) of this embodiment can be placed upside down. When the ventilation device (20) is placed upside down, the electrical component box (100) is also placed upside down. Specifically, in the electrical component box (100), the first surface (F1) of the main body box (110) is on the lower side and the fourth surface (F4) is on the upper side.

[0078] Even if the electrical component box (100) is placed upside down, the third surface (F3) and the fifth surface (F5) are surfaces that extend in the up-down direction. In other words, water droplets falling from above the electrical component box (100) are unlikely to hit the first opening (H1) and the third opening (H3).

[0079] The fourth opening (H4) is covered with a bottom cover (113). Even if the electrical component box (100) is arranged with the F4 side facing upward, water will not fall directly into the fourth opening (H4).

[0080] The periphery of the fourth opening (H4) is burred. If the electrical component box (100) is placed upside down, even if water droplets enter the third space (S3) for some reason, the raised edge created by the burring can prevent water from entering the accommodation space (S0) through the fourth opening (H4).

[0081] As described above, the electrical component box (100) can prevent falling water from entering the electrical component box (100) even when the ventilation device (20) is placed upside down.

[0082] In the electrical component box (100), the storage space (S0) is divided into two regions (A1, A2) by the partition plate (116). The first heat-generating component (120a, 120b) and the second heat-generating component (130b) are arranged in different regions (A1, A2). In the electrical component box (100), air suitable for cooling the first heat-generating component (120a, 120b) and the second heat-generating component (130b) can be supplied. In the electrical component box (100), the heat-generating components (120a, 120b, 130b) can be efficiently cooled. This is because the partition plate (116) allows cooling air to be introduced intensively into the first region (A1).

[0083] Second Embodiment 9 shows a schematic cross-sectional structure of an electrical component box (100) in embodiment 2. The electrical component box (100) in embodiment 2 does not include the rear cover (111) and the bottom cover (113) that are present in the electrical component box (100) in embodiment 1. The configuration of the top cover (112) (second cover) in embodiment 2 is different from that of the top cover (112) in embodiment 1.

[0084] 10 is a perspective view illustrating a schematic structure of a top cover (112) in embodiment 2. The top cover (112) in embodiment 2 has a plurality of slit-shaped introduction ports (H6) formed in at least a part of a side surface (F6) extending in the vertical direction of the top cover (112) in embodiment 1.

[0085] In this example, the side surface (F6) extends vertically when the electrical component box (100) is installed. In the following, the side surface (F6) is also referred to as the sixth surface. The inlet (H6) is also referred to as the sixth opening.

[0086] <Cooling of heat-generating components> The arrows in Fig. 9 indicate the flow of air. In the electrical component box (100), when the fan (140) is operated, an air flow is formed in the first area (A1) from the second opening (H2) toward the fan (140). Air outside the electrical component box (100) is taken into the first space (S1) through the inlet (H6).

[0087] The air taken into the first space (S1) enters the first area (A1) through the second opening (H2). The air in the first area (A1) is exhausted by the fan (140) to the outside of the electrical component box (100) through the fourth opening (H4).

[0088] When the converter circuit operates in the electrical component box (100), the first heat-generating components (120a, 120b) generate heat. The heat of the first heat-generating components (120a, 120b) is cooled by the air flow formed in the first area (A1) as described above. The air that has cooled the first heat-generating components (120a, 120b) is discharged to the outside of the electrical component box (100) through the fourth opening (H4).

[0089] In the second embodiment, there is no rear cover (111). The heat sink (130a) dissipates heat to the air outside the housing portion (115) (in other words, the air outside the electrical component box (100)). As a result, the second heat-generating component (130b) is cooled.

[0090] Effects of this embodiment The sixth opening (H6) is formed on a surface other than the first surface (F1). With this configuration, in this embodiment as well, the infiltration of fallen water into the electrical component box (100) is suppressed.

[0091] More specifically, the inlet (H6) is provided on the side surface (F6). The side surface (F6) is a surface of the top cover (112) that extends in the vertical direction. Falling water droplets are unlikely to hit the side surface (F6) that extends in the vertical direction. In other words, water droplets falling from above the electrical component box (100) are unlikely to enter the inlet (H6). The electrical component box (100) of the second embodiment can also prevent falling water from entering the electrical component box (100).

[0092] Third Embodiment 11 is a schematic cross-sectional view of an electrical component box (100) according to embodiment 3. The electrical component box (100) according to embodiment 3 does not include the rear cover (111) that is included in embodiment 1. The top cover (112) (second cover) in embodiment 3 is the same as the top cover (112) employed in embodiment 2.

[0093] The electrical component box (100) of the third embodiment can be arranged upside down. Figure 11 shows the upside down state.

[0094] <Cooling of heat-generating components> The arrows in Fig. 11 indicate the flow of air. When the fan (140) in the electrical component box (100) is operated, an air flow is formed in the first area (A1) from the second opening (H2) toward the fan (140). As a result, air outside the electrical component box (100) is taken into the first space (S1) through the inlet (H6) (sixth opening).

[0095] The air taken into the first space (S1) enters the first area (A1) through the second opening (H2). The air in the first area (A1) flows into the third space (S3) by the fan (140). The air in the third space (S3) is exhausted to the outside of the electrical component box (100) through the first opening (H1) formed in the bottom cover (113).

[0096] When the converter circuit operates in the electrical component box (100), the first heat-generating components (120a, 120b) generate heat. The heat of the first heat-generating components (120a, 120b) is cooled by the air flow formed in the first area (A1) or the like as described above. The air that has cooled the first heat-generating components (120a, 120b) is discharged to the outside of the electrical component box (100) through the first opening (H1).

[0097] In the third embodiment, there is no rear cover (111). The heat sink (130a) dissipates heat to the air outside the housing portion (115) (in other words, outside the electrical component box (100)). As a result, the second heat-generating component (130b) is cooled.

[0098] Effects of this embodiment The first opening (H1) is provided in the side surface (F5) (fifth surface). The inlet (H6) is provided in the side surface (F6) (sixth surface). The side surfaces (F5) and (F6) are surfaces that extend in the vertical direction when the electrical component box (100) is installed.

[0099] Falling water droplets are unlikely to hit the fifth surface (F5) and the side surface (F6) extending in the vertical direction. In other words, water droplets falling from above the electrical component box (100) are unlikely to enter the first opening (H1) and the inlet (H6). The electrical component box (100) of the third embodiment can also prevent falling water from entering the electrical component box (100).

[0100] Other Embodiments In the first to third embodiments, instead of the covers (first to third covers), a partition plate may be provided in the storage section (115) to define the first space (S1), the second space (S2), etc. by the partition plate.

[0101] The third opening (H3) may be provided in the second surface (F2). Since the second surface (F2) also extends in the vertical direction, even if the third opening (H3) is provided in the second surface (F2), falling water droplets are unlikely to enter the third opening (H3).

[0102] The shapes, numbers, and sizes of the illustrated first opening (H1), third opening (H3), sixth opening (H6), etc. are merely examples, and these openings are not limited to the illustrated examples.

[0103] The positions of the fans (140) are merely examples, and the fans (140) may be located at other positions within the first area (A1). The number of the fans (140) is also merely examples, and additional fans (140) may be provided.

[0104] Although the embodiment and the modified examples have been described above, it will be understood that various modifications in form and details are possible without departing from the spirit and scope of the claims. Elements of the above embodiment, modified examples, and other embodiments may be appropriately combined or substituted. [Industrial Applicability]

[0105] INDUSTRIAL APPLICABILITY As described above, the present disclosure is useful for an electrical component box and a ventilation device. [Explanation of symbols]

[0106] 20 Ventilation system 100 Electrical equipment box 110 Main unit box 115a Back panel (second partition panel) 115b Top plate (first partition plate) 120a, 120b First heat generating component 130a Heatsink 130b Second heat generating component 140 Fans A1 1st area A2 2nd area F1 front page F2,F3 side H1 1st opening H2 2nd opening H3,H6 inlet S0 Containment Space S1 1st space S2 2nd space

Claims

1. The device includes a first heat generating component (120a, 120b), a fan (140), and a main body box (110), The main body box (110) is The first page (F1) and a first partition plate (115b) that divides the inside of the main body box (110) into an accommodation space (S0) that accommodates the first heat generating components (120a, 120b) and the fan (140) and a first space (S1) facing the first surface (F1); Equipped with The first surface (F1) of the main body box (110) is an upper surface, and inlets (H3, H6) for introducing air outside the main body box (110) into the first space (S1) and a first opening (H1) for discharging air within the storage space (S0) to the outside by the fan (140) are formed on surfaces extending in the vertical direction other than the first surface (F1), The first partition plate (115b) has a second opening (H2). Electrical equipment box.

2. In the electrical equipment box of claim 1, The inlets (H3, H6) are provided on a wall surface of the electrical equipment box other than the wall surface that defines the storage space (S0). Electrical equipment box.

3. The electrical equipment box according to claim 1, The main body box (110) is a plurality of side surfaces (F2, F3) different from the first surface (F1) extending in a vertical direction when the main body box (110) is installed; a second partition plate (115a) that divides the inside of the main body box (110) into the storage space (S0) and a second space (S2) facing at least some of the plurality of side surfaces (F2, F3); Equipped with The first space (S1) and the second space (S2) are in communication with each other, The inlet (H3, H6) is formed in at least a part of the plurality of side surfaces (F2, F3) constituting the second space (S2). Electrical equipment box.

4. The electrical equipment box according to claim 3, A second heat generating component (130b) and a heat sink (130a), The heat sink (130a) dissipates heat from the second heat generating component (130b) to the second space (S2). Electrical equipment box.

5. The electrical equipment box according to claim 4, a third partition plate (116) that divides the accommodation space (S0) into a first area (A1) in which the first heat generating component (120a, 120b) is accommodated and a second area (A2) in which the second heat generating component (130b) is accommodated; The second opening (H2) opens into the first region (A1), the fan (140) is provided in the first area (A1); Electrical equipment box.

6. A ventilation device comprising an electrical equipment box according to any one of claims 1 to 5.

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