Louver and housing

Abstract

To provide a louver and a housing capable of preventing the intrusion of water and dust.SOLUTION: A louver 33 provided in a housing 2 includes: a wall portion 34 that is formed in a rectangular shape long in one direction, has a rectangular opening 34a formed threrein, is formed integrally with the housing 2 or is fixed to a part of the housing 2; a louver convex portion 61 that extends from an upper edge of the opening 34a of the wall portion 34 to the outside of the housing 2 and has a curved portion 61a covering the outside of the opening 34a; a connection portion 62a that is formed on the wall portion 34 and slopes inward and upward toward the housing 2; and a louver recess 62 that is formed integrally with the connection portion 62a and slopes toward the wall portion 34 and upward, has an upper end forming a lower edge of the opening 34a and has a vertical wall portion 62b positioned at the same height as a tip of the curved portion 61a.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a louver and a housing. [Background technology]

[0002] A technique for providing a louver as a ventilation opening in a housing for a device or an electric component has been known for some time (see, for example, Patent Document 1). Such a louver is formed by covering an opening formed in a part of the housing with a plurality of blades, allowing outside air to be taken in and exhausted. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 08-121853 Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-mentioned louver, if the opening is enlarged to facilitate heat release, rainwater and dust blown up from below can easily enter the housing. Furthermore, if the opening area is enlarged, the housing and louver are likely to lack strength if they are made of a relatively soft material such as a resin material. Furthermore, solving these problems requires a complex louver shape, which requires welding for metal materials or a slide mold for resin molding, increasing manufacturing costs. Furthermore, a complex-shaped louver results in a smaller opening area effective for ventilation, which may hinder the intake and exhaust of outside air.

[0005] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a louver and a housing that can prevent the intrusion of water and dust. [Means for solving the problem]

[0006] According to one aspect of the present invention, the grille is provided in a housing and is formed in a rectangular shape that is long in one direction and has a rectangular opening. The grille comprises: a wall portion that is formed integrally with the housing or fixed to a part of the housing; a grille convex portion that extends from the upper edge of the opening in the wall portion to the outside of the housing and has a curved portion that covers the outside of the opening; a connection portion that is formed in the wall portion and slopes toward the inside and upward of the housing; and a grille recess that is formed integrally with the connection portion and slopes toward the wall portion and upward, whose upper end forms the lower edge of the opening and has a standing wall portion at the same height as the tip of the curved portion. [Effects of the Invention]

[0007] According to the present invention, it is possible to provide a louver and a housing that can prevent the intrusion of water and dust. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a perspective view showing a configuration of a pump device having a housing according to an embodiment of the present invention; [Figure 2] FIG. 2 is a perspective view showing the configuration of the pump device. [Figure 3] FIG. 2 is a perspective view showing a part of the configuration of a cover used in the pump device; [Figure 4] FIG. 4 is a perspective view showing the configuration of a louver used in the cover. [Figure 5] FIG. [Figure 6] FIG. 2 is a perspective view showing the configuration of the pump device with the cover omitted. [Figure 7] FIG. 4 is a perspective view showing the main configuration of a first cover of the cover. [Figure 8] FIG. 4 is a perspective view showing the main configuration of a second cover of the cover. [Figure 9] FIG. 10 is a front view showing the configuration of a housing according to another embodiment. [Figure 10] FIG. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, the configuration of a pump device 1 using a louver 33 and a housing 2 having the louver 33 according to an embodiment of the present invention will be described with reference to FIGS.

[0010] FIG. 1 is a perspective view showing the configuration of a pump device 1 having a housing 2 according to an embodiment, and FIG. 2 is a perspective view showing the configuration of the pump device 1 from a different direction than that of FIG. 1. FIG. 3 is a perspective view showing the configuration of the pump device 1 with the second cover 32 of the cover 16, which is the housing 2, omitted. FIG. 4 is a perspective view showing the configuration of a louver 33 used in the cover 16. FIG. 5 is a cross-sectional view showing the configuration of the louver 33. FIG. 6 is a perspective view showing the configuration of the pump device 1 with the cover 16 omitted. FIG. 7 is a perspective view showing the configuration of a main part of a first cover 31 of the cover 16. FIG. 8 is a perspective view showing the configuration of a main part of a second cover 32 of the cover 16. FIG. 9 is an explanatory diagram showing an example of the results of an evaluation test of the louver 33.

[0011] The housing 2 is an exterior that houses devices, and in this embodiment, an example will be described in which the housing 2 is used for the pump device 1. Note that the housing 2 may not be used for the pump device 1, but may be used as an exterior for mechanical and / or electrical devices or units other than the pump device 1.

[0012] 1 to 3 and 6, the pump device 1 includes a base 10, one or more pump units 11, a suction pipe 12, a discharge pipe 13, an accumulator 14, a control panel 15, and a cover 16. The pump device 1 may also include a check valve, a pressure sensor, a flow rate sensor, etc. The base 10 and cover 16 of the pump device 1 constitute a housing 2 that houses the pump unit 11, the suction pipe 12, the discharge pipe 13, the accumulator 14, and the control panel 15.

[0013] The base 10 is placed on or fixed to the installation surface of the pump device 1. The base 10 fixes and supports the pump unit 11 and the control panel 15 on its upper surface. For example, the base 10 has a support member 10a that fixes and supports the cover 16. For example, the support member 10a is formed in a plate shape and has a screw hole 10a1 formed therein into which a fastening member such as a bolt or a screw is threadedly engaged.

[0014] The base 10 is formed, for example, in a rectangular shape, and when one direction along the top surface is the front-rear direction and one direction along the top surface perpendicular to the front-rear direction is the left-right direction, a pump 22, suction pipe 12, and discharge pipe 13 (to be described later) of the pump unit 11 are arranged on the front side, and a motor 21 and control panel 15 (to be described later) of the pump unit 11 are arranged on the rear side. In addition, when a pair of pump units 11 are provided, one pump unit 11 is arranged on the right side in the left-right direction, and the other pump unit 11 is arranged on the left side.

[0015] For example, a pair of pump units 11 are provided. The pump unit 11 is, for example, a horizontal shaft pump, but may also be a vertical shaft pump. The pump unit 11 includes a motor 21 and a pump 22. The motor 21 is, for example, connected to a control panel 15, and its frequency is controlled by the control panel 15 so as to be variable. The motor 21 is connected to the pump 22 and drives the pump 22. The motor 21 is fixed to the pump 22. Note that the motor 21 may be configured to be fixed to the pump 22 and supported by the base 10, for example. The motor 21 includes an external cooling fan and a fan cover 21a, and the fan cover 21a faces a second cover 32 of the cover 16, which will be described later, with a predetermined gap between them. An intake port 21a1 for drawing in air is formed on the surface of the fan cover 21a facing the second cover 32.

[0016] Pump 22 includes, for example, pump casing 22a and an impeller connected to the rotating shaft of motor 21 and housed within the pump casing. Pump 22 may be a single-stage pump with one impeller, or a multi-stage pump with multiple impellers. Pump casing 22a has legs 22b that are fixed to base 10 with fastening members such as bolts.

[0017] The suction pipe 12 is connected to the suction port of the pump casing 22a or forms the suction port of the pump casing 22a. The suction pipe 12 has, for example, a flange to which other piping can be connected. The suction pipe 12 is, for example, a piping connected to each suction port of the pump casing 22a. Note that the suction pipe 12 may be a branch pipe whose secondary side branches and is connected to the suction ports of the pump casings 22a.

[0018] The discharge pipe 13 is connected to the discharge ports of the pump casings 22a. The discharge pipe 13 has, for example, a flange to which other piping can be connected. The discharge pipe 13 is, for example, connected to the discharge ports of the pump casings 22a and is a confluence pipe that joins on the secondary side. The accumulator 14 is, for example, connected to the discharge pipe 13.

[0019] The control panel 15 houses electrical components including, for example, a display unit, an inverter, a storage unit, and a control unit. Alternatively, the control panel 15 may not have an inverter, but may have an inverter mounted on the motor 21. The display unit is a display, LED, or the like that can display the operating status of the pump unit 11, the presence or absence of an abnormality, etc. The inverter is electrically connected to the motor 21 and the control unit via a signal line. For example, the same number of inverters as the number of motors 21, for example, two, are provided. The inverter is a control circuit that controls the frequency of the motor 21. Alternatively, the control panel 15 may have a communication unit that can wirelessly communicate with an external terminal.

[0020] The memory unit stores, for example, a starting pressure for starting the pump unit 11, a target pressure and rated flow rate during water supply, and a stop flow rate for stopping water supply. The memory unit also stores various programs such as a control program for controlling the inverter by the control unit during water supply operation, and a fault detection program for detecting faults in the check valve and various sensors.

[0021] The control unit controls the inverter based on the pressure and flow rate detected by the pressure sensor and flow rate sensor, for example, and controls the pump unit 11 so that the discharge pressure or estimated terminal pressure is constant.

[0022] The cover 16 covers components (devices) provided on the base 10. As a specific example, as shown in Figures 1 and 2, the cover 16 includes a first cover 31 and a second cover 32. The cover 16 also includes at least one louver 33 provided on at least one of the first cover 31 and the second cover 32, i.e., the first cover 31 and the second cover 32 in this embodiment.

[0023] The cover 16 is divided into two, a first cover 31 and a second cover 32, in the front-to-rear direction of the pump device 1, and is formed so that the first cover 31 and the second cover 32 can be assembled and separated as a single unit, and so that the first cover 31 and the second cover 32 can be stacked. As shown in Fig. 5, for example, the cover 16 has a plurality of reinforcing ribs 16a on the inner surfaces of the first cover 31 and the second cover 32. For example, the ribs 16a are formed in a shape that is elongated in one direction, but the number and shape of the ribs 16a can be set as appropriate.

[0024] The first cover 31 has a pair of opposing first side walls 41, a second side wall 42 continuous with the pair of first side walls 41, and a first top wall 43 continuous with the pair of first side walls 41 and second side walls 42. The second side wall 42 of the first cover 31 forms the front wall of the cover 16, and the first cover 31 is open at the rear and bottom. The first cover 31 is disposed, for example, on the front side of the base 10. The first cover 31 also has a first flange 44 for fastening to the second cover 32 with a fastening member.

[0025] The pair of first side walls 41 form part of the left and right side walls of the cover 16. The pair of first side walls 41 are formed along the front-rear direction. Alternatively, the pair of first side walls 41 may be inclined so that the width in the left-right direction gradually narrows from the rear side toward the second side wall 42.

[0026] 1 to 3, each first side wall 41 has one or more first recesses 41a extending along the front-rear direction of the first side wall 41, second recesses 41b inclined with respect to both the front-rear direction and the up-down direction of the first side wall 41, and a seat 41c formed on the second side wall 42 side of the first side wall 41. A plurality of first slits 41d extending in the front-rear direction are formed at the lower end of each first side wall 41. Furthermore, as shown in FIG. 3, a first insertion portion 41e is formed above the rear end of each first side wall 41. The first insertion portion 41e is, for example, a circular, elliptical, U-shaped, or other notch formed at the rear end of the first side wall 41 or a circular, elliptical, or other hole formed at a position slightly away from the rear end of the first side wall 41, and is capable of receiving a threaded portion of a bolt, a rod-shaped pin, or other shaft.

[0027] In this embodiment, for example, one first recess 41a is provided in each first side wall 41. For example, the first recess 41a extends rearward in the front-to-rear direction from an edge portion on the front side (the second side wall 42 side) of the first side wall 41, and is curved and recessed with a predetermined radius of curvature toward the inside of the first cover 31. As a specific example, the first recess 41a is a recess in the shape of a semi-cylindrical or approximately semi-cylindrical column.

[0028] For example, one second recess 41b is provided in each first side wall 41. The second recess 41b is provided, for example, on the first top wall 43 side of the first side wall 41, and extends rearward and upward from the edge on the front side (the second side wall 42 side) at an angle with respect to the front-to-rear and up-down directions, and is recessed while curved with a predetermined radius of curvature toward the inside of the first cover 31. As a specific example, the second recess 41b is recessed in a substantially semi-cylindrical shape, and the upper side of the second recess 41b (the first top wall 43 side) extends in the direction of gravity and the front-to-back direction.

[0029] The seat portion 41c is disposed opposite the support member 10a of the base 10 when the first cover 31 is fixed to the base 10. The seat portion 41c is formed with a hole 41c1 into which a fastening member such as a bolt or a screw is inserted. The outer surface of the seat portion 41c forms a seat surface that abuts against the head of the fastening member when the fastening member inserted into the hole 41c1 is screwed into a screw hole formed in the support member 10a of the base 10.

[0030] The multiple first slits 41d are used for intake. The first slits 41d extend in the front-rear direction. The multiple first slits 41d are arranged side by side in the up-down direction. The longitudinal lengths of the multiple first slits 41d may be the same or different. For example, among the multiple first slits 41d, the first slits 41d on the lower side in the up-down direction are longer than the first slits 41d on the upper side.

[0031] The second side wall 42 forms the front wall of the cover 16. An opening 42a is formed in the second side wall 42, for example, through which the two suction pipes 12 and the discharge pipe 13 face each other. For example, the opening 42a is formed as a single continuous shape so that the two suction pipes 12 and the discharge pipe 13 can face each other. As a specific example, the opening 42a is provided on the lower end side of the second side wall 42 and extends in the left-right direction so that it can face the two suction pipes 12, and is also provided in the center of the second side wall 42 in the left-right direction so that it can extend in the up-down direction so that its upper end side can face the discharge pipe 13. In addition, the second side wall 42 has a panel 42b that closes a portion of the opening 42a, specifically, a region of the opening 42a that does not face the two suction pipes 12 and the discharge pipe 13.

[0032] The first top wall 43 forms a part of the top wall of the cover 16. The first top wall 43 includes, for example, a plurality of third recesses 43a extending along the front-rear direction of the first top wall 43 and a plurality of engaging protrusions 43b. The first top wall 43 is formed, for example, in a curved shape such that the center side is higher than the end sides in the left-right direction. In addition, a corner 43c, which is a portion of the front end of the first top wall 43 that is continuous with the second side wall 42, is formed in a curved shape with a predetermined radius of curvature. This corner 43c of the front end of the first top wall 43 that is continuous with the second side wall 42 forms a ridge of the second side wall 42 and the first top wall 43.

[0033] The third recess 43a extends forward in the front-to-rear direction from the rear edge of the first top wall 43, and is curved with a predetermined radius of curvature toward the inside of the first cover 31. As a specific example, the third recess 43a is a recess having a semi-cylindrical or approximately semi-cylindrical shape.

[0034] As shown in FIG. 7 , the engaging protrusion 43b is formed, for example, at a curved corner 43c that is continuous with the second side wall 42 of the first top wall 43. For example, a plurality of engaging protrusions 43b (for example, two engaging protrusions 43b) are provided, spaced a predetermined distance apart in the left-right direction. The engaging protrusions 43b are formed to be able to hold the inner surface of the second cover 32 when the second cover 32 is placed on the first cover 31. The left-right spacing between the two engaging protrusions 43b is the same as the spacing between two laterally aligned fourth slits 52c of the second cover 32, and the left-right width of the engaging protrusion 43b is equal to or less than the opening width of the fourth slits 52c. The front end of the engaging protrusion 43b (the end on the second side wall 42 side) is spaced from the upper surface of the first top wall 43 by a width greater than the thickness of at least a portion of the fourth side wall 52 of the second cover 32 that is located below the fourth slit 52c. Furthermore, the width of the engagement protrusion 43b in the front-rear direction is smaller than that of the fourth slit 52c.

[0035] As a specific example, the engaging protrusion 43b has a curved outer surface 43b1 with the same radius of curvature as the radius of curvature of the inner surface of a curved corner 53c on the rear side (fourth side wall 52 side) of a second top wall 53 (described later) of the second cover 32. The outer surface 43b1 may be formed in a flat shape along the tangent direction of the radius of curvature of the inner surface of the corner 53c of the second top wall 53. The upper surface of the engaging protrusion 43b is flush with and continues forward from the upper surface of the first top wall 43. The outer surface 43b1 is formed to be inclined forward from the upper surface of the engaging protrusion 43b, following the shape of the corner 43c of the first cover 31.

[0036] The first flange 44 is formed on the edge portions of the pair of first side walls 41 and / or the first top wall 43. In the present embodiment, the first flange 44 is formed on the edge portions of the pair of first side walls 41 and the first top wall 43. The first flange 44 has holes 44a formed in regions formed at the ends of the plurality of first recesses 41a and second recesses 41b formed in the pair of first side walls 41 and the plurality of third recesses 43a formed in the first top wall 43, into which fastening members are inserted or into which fastening members are screwed.

[0037] The second cover 32 is connected to the first cover 31 with fastening members such as bolts and nuts. The second cover 32 has a pair of opposing third side walls 51, a fourth side wall 52 continuous with the pair of third side walls 51, and a second top wall 53 continuous with the pair of third side walls 51 and fourth side walls 52. The fourth side wall 52 of the second cover 32 forms the rear wall of the cover 16, and the second cover 32 is open at the front and bottom. The second cover 32 is disposed, for example, on the rear side of the base 10. The second cover 32 also has a second flange 54 for fastening to the first cover 31 with fastening members. The second cover 32 covers, for example, main electrical equipment disposed on the base 10, such as the motor 21 and the control panel 15.

[0038] The pair of third side walls 51 form part of the left and right side walls of the cover 16. That is, the pair of third side walls 51, together with the pair of first side walls 41, form a pair of left-right side walls of the cover 16. The pair of third side walls 51 are formed along the front-rear direction. Alternatively, the pair of third side walls 51 may be inclined so that their width in the left-right direction gradually narrows from the front toward the fourth side wall 52. Each third side wall 51 also has one or more fourth recesses 51a extending along the front-rear direction of the third side wall 51, fifth recesses 51b inclined with respect to both the front-rear direction and the up-down direction of the third side wall 51, and a seat portion 51c formed on the fourth side wall 52 side of the third side wall 51. For example, a plurality of second slits 51d extending in the front-rear direction are formed at the lower end of each third side wall 51. As shown in FIG. 2, a second insertion portion 51e is formed on the lower side of the rear end of each third side wall 51. The second insertion portion 51e is, for example, a circular, elliptical, U-shaped, or other notch formed in the front end of the third side wall 51 or a circular, elliptical, or other hole formed at a position slightly away from the front end of the third side wall 51, and is capable of inserting a shaft such as the threaded portion of a bolt or a rod-shaped pin.

[0039] In the present embodiment, for example, one fourth recess 51a is provided in each third side wall 51. For example, the fourth recess 51a extends rearward in the front-to-rear direction from an edge portion on the rear side (fourth side wall 52 side) of the third side wall 51, and is curved and recessed with a predetermined radius of curvature toward the inside of the second cover 32. As a specific example, the fourth recess 51a is a recess having a semi-cylindrical or approximately semi-cylindrical shape.

[0040] For example, one fifth recess 51b is provided in each third side wall 51. The fifth recess 51b is provided, for example, on the second top wall 53 side of the third side wall 51, and extends from the edge on the rear side (the fourth side wall 52 side) toward the front and upper sides at an angle with respect to the front-to-rear and up-down directions, and is recessed while curved with a predetermined radius of curvature toward the inside of the second cover 32. As a specific example, the fifth recess 51b is recessed in a substantially semi-cylindrical shape, and the upper side of the fifth recess 51b (the second top wall 53 side) extends in the direction of gravity and the front-to-back direction.

[0041] The seat portion 51c is disposed opposite the support member 10a of the base 10 when the second cover 32 is fixed to the base 10. The seat portion 51c is formed with a hole 51c1 into which a fastening member such as a bolt or a screw is inserted. The outer surface of the seat portion 51c forms a seat surface that abuts against the head of the fastening member when the fastening member inserted into the hole 51c1 is screwed into a screw hole formed in the support member 10a of the base 10.

[0042] The second slits 51d are used for intake. The second slits 51d extend in the front-rear direction. The second slits 51d are arranged side by side in the up-down direction. The longitudinal lengths of the second slits 51d may be the same or different. For example, the second slits 51d on the lower side in the up-down direction are longer than the second slits 51d on the upper side.

[0043] The fourth side wall 52 forms the rear wall of the cover 16. The fourth side wall 52 has a window 52a through which, for example, the display unit of the control panel 15 can be viewed. The fourth side wall 52 also has a plurality of third slits 52b formed on the center side and the left and right end sides in the left-right direction of the lower end, and a pair of fourth slits 52c formed adjacent to the plurality of third slits 52b on the center side.

[0044] For example, the window portion 52a is formed from a transparent resin material. For example, the window portion 52a is formed by fixing a plate material made of a transparent resin material to an opening formed in the fourth side wall 52. Note that the window portion 52a may be molded by two-color molding using different resin materials, for example.

[0045] The third slit 52b is used for intake. The third slit 52b extends in the left-right direction. The multiple third slits 52b are arranged side by side in the up-down direction. The longitudinal lengths of the multiple third slits 52b may be the same or different. For example, as shown in FIG. 8, the multiple third slits 52b provided at each position are formed to have the same length. For example, the third slit 52b is arranged below the motor 21.

[0046] The fourth slits 52c are used for intake. The fourth slits 52c are formed so that protrusions 53b provided on the second top wall 53 of the first cover 31 can be inserted therein and so that the tips of the protrusions 53b can be held therein. The fourth slits 52c extend in the up-down direction. As shown in FIG. 8, the two fourth slits 52c are provided adjacent to the left and right ends of the plurality of third slits 52b provided in the center in the left-right direction. The two fourth slits 52c are arranged at the same interval as the pair of protrusions 53b and are formed so that the pair of protrusions 53b can be inserted therein.

[0047] The second top wall 53 forms a part of the top wall of the cover 16. The second top wall 53 has, for example, a plurality of sixth recesses 53a extending along the front-rear direction of the second top wall 53. The second top wall 53 is formed, for example, in a curved shape such that the center side is higher than the end sides in the left-right direction. In addition, a corner 53c, which is a portion of the rear end of the second top wall 53 that continues with the fourth side wall 52, is formed in a curved shape with a predetermined radius of curvature. The corner 53c of the second top wall 53 forms a ridge of the fourth side wall 52 and the second top wall 53.

[0048] The sixth recess 53a extends rearward in the front-to-rear direction from the front edge of the second top wall 53 and is curved and recessed with a predetermined radius of curvature toward the inside of the second cover 32. As a specific example, the sixth recess 53a is a semi-cylindrical or approximately semi-cylindrical recess. The sixth recess 53a has a larger radius of curvature than the third recess 43a of the first top wall 43. That is, the radius of curvature of the outer peripheral surface of the sixth recess 53a is equal to or smaller than the radius of curvature of the inner peripheral surface of the third recess 43a so that the sixth recess 53a can be placed in the third recess 43a.

[0049] The second flange 54 is formed on the edges of the pair of third side walls 51 and / or the second top wall 53. In this embodiment, the second flange 54 is formed on the edges of the pair of third side walls 51 and the second top wall 53. The second flange 54 has holes 54a into which fastening members are inserted or into which fastening members are screwed, for example, at portions formed at the ends of the plurality of fourth recesses 51a and fifth recesses 51b formed in the pair of third side walls 51 and the plurality of sixth recesses 53a formed in the second top wall 53. The second flange 54 is formed to face the first flange 44 and to be able to abut against it, and the holes 54a of the second flange 54 face the holes 44a of the first flange 44. This allows the first flange 44 and the second flange 54 to be fastened together by fastening members inserted into the holes 44a of the opposing first flange 44 and holes 54a of the second flange 54.

[0050] In such first cover 31 and second cover 32, the outer surface shape of the first cover 31 is the same as or smaller than the inner surface shape of the second cover 32. Furthermore, the first flange 44 of the first cover 31 is formed so as to be able to abut against the second flange 54 of the second cover 32. As a result, the first cover 31 is formed so as to be able to be coupled to the second cover 32 by a fastening member with the first flange 44 and the second flange 54 abutting against each other and with the holes 44a, 54a facing each other.

[0051] At least one louver 33 is provided on the first cover 31 and / or the second cover 32. In this embodiment, an example will be described in which two louvers 33 are provided on the first cover 31 and two on the second cover 32. The louvers 33 are formed integrally with flat plate-shaped portions of the first cover 31 and the second cover 32. In the following description, the planar portions of the first cover 31 and the second cover 32 will be described as wall portions 34.

[0052] The wall portion 34 has at least one opening 34a (in this embodiment, multiple openings 34a) formed therein, and the louver 33 covers the multiple openings 34a. As a specific example, as shown in FIGS. 4 and 5 , the louver 33 includes louver protrusions 61 provided above each opening 34a and protruding outward from the wall portion 34, louver recesses 62 provided below each opening 34a and recessed inward into the wall portion 34, and a rib 63 formed integrally with the louver protrusions 61 and the louver recesses 62. The louver 33 is formed of a resin material using a mold by, for example, injection molding. Furthermore, the multiple louvers 33 are each positioned above the pump unit 11 when the cover 16 is assembled to the base 10.

[0053] The louver protrusions 61 protrude from the outer surface of the wall portion 34 above each opening 34a, and cover the openings 34a from the outside in a direction perpendicular to the main surface direction of the wall portion 34. The louver protrusions 61 include a curved surface portion 61a and a side surface portion 61b.

[0054] The curved surface portion 61a extends outward and downward in a curved shape from the upper edge of the opening 34a. The curved surface portion 61a is formed to have the same width as the upper edge of the opening 34a. The cross section of the curved surface portion 61a is formed in an arc shape. The lower end of the curved surface portion 61a is at the same height as the lower edge of the opening 34a.

[0055] The side surface portions 61b are provided at both longitudinal (left-right) ends of the curved surface portion 61a. The side surface portions 61b are formed in the shape of flat plates that are continuous with both longitudinal ends of the curved surface portion 61a and both longitudinal edges of the opening 34a of the wall portion 34. The lower end of the side surface portion 61b is at the same height as the lower end of the curved surface portion 61a and the lower edge of the opening 34a.

[0056] The louver recess 62 protrudes from the inner surface of the wall portion 34 at the bottom of each opening 34a and is disposed below the opening 34a. The louver recess 62 includes a connecting portion 62a, an upright wall portion 62b, and a side surface portion 62c.

[0057] The connecting portion 62a connects the wall portion 34 and the standing wall portion 62b. The connecting portion 62a is a flat plate that is long in one direction. The longitudinal length of the connecting portion 62a is the same as the longitudinal length of the opening 34a. The connecting portion 62a extends from the wall portion 34 below the lower edge of the opening 34a toward the inside and upward of the wall portion 34 (housing 2). For example, the connecting portion 62a is provided continuous with the curved portion 61a that covers the opening 34a provided below.

[0058] The standing wall portion 62b is formed integrally with the upper end of the connecting portion 62a. The standing wall portion 62b extends upward from the connecting portion 62a toward the wall portion 34, and its tip portion forms the lower edge of the opening 34a. The tip portion of the standing wall portion 62b is disposed, for example, at the same position as the outer surface of the wall portion 34 in a direction perpendicular to the main surface direction of the wall portion 34. The upper end of the tip portion of the standing wall portion 62b is at the same height as the lower end of the curved surface portion 61a. For example, the connecting portion 62a extends in a direction perpendicular to the standing wall portion 62b.

[0059] The side surface portion 62c is formed in a flat plate shape that is continuous with the wall portion 34, the connecting portion 62a, and the standing wall portion 62b. The side surface portion 62c is provided at both longitudinal (left-right) ends of the connecting portion 62a and the standing wall portion 62b. The side surface portion 62c is formed in a flat plate shape that is continuous with both longitudinal ends of the connecting portion 62a and the standing wall portion 62b, and the wall portion 34. The upper end of the side surface portion 62b is at the same height as the upper end of the standing wall portion 62b, i.e., the lower edge of the opening 34a.

[0060] One or more ribs 63 are provided in the longitudinal direction of the opening 34a. In this case, the ribs 63 divide the opening 34a into two or more sections in the longitudinal direction of the opening 34a. For example, in the example of FIG. 1, the louver 33 provided on the second cover 32 is provided with one rib 63, and in the example of FIG. 2, the louver 33 provided on the first cover 31 is provided with one rib 63. As shown in FIGS. 4 and 5, the rib 63 is formed in a plate shape extending in the direction of gravity and is provided integrally with the louver protrusion 61 and the louver recess 62. As a specific example, the rib 63 reinforces the louver protrusion 61 and the louver recess 62, and is formed so that an upper end of the rib 63 is integrally connected to the inner surface of the curved surface portion 61a and a lower end of the rib 63 is integrally connected to the connecting portion 62a and the standing wall portion 62b. As shown in FIG. 5, the outer side of the rib 63 is inclined with respect to the vertical direction from the lower end of the curved surface portion 61a toward the connecting portion 62a.

[0061] Such a louver 33 is formed by a plurality of louver protrusions 61 and a plurality of louver recesses 62 arranged side by side in the direction of gravity, with openings 34a formed between each of the louver protrusions 61 and each of the louver recesses 62, and each of the louver recesses 62 recessing a portion of the wall portion 34. Furthermore, the upper tip of the standing wall portion 62b of the louver recess 62 in the up-down direction faces the inner surface of the curved surface portion 61a of the louver protrusion 61 in the main surface direction (inclination direction) of the standing wall portion 62b.

[0062] According to such a louver 33, each opening 34a is covered by the curved surface portion 61a of each louver protrusion 61 in a direction perpendicular to the main surface of the wall portion 34, i.e., in a horizontal direction perpendicular to the up-down direction. Therefore, when fluid attempts to move from the outside to the inside of the cover 16 (wall portion 34), it moves from the louver recess 62 arranged below the louver protrusion 61 to the opening 34a. Specifically, the fluid moves obliquely upward from the outside to the inside of the wall portion 34 along the connecting portion 62a, and also moves obliquely upward from the inside to the outside of the wall portion 34 along the upright wall portion 62b. Since the vertical wall portion 62b faces the curved portion 61a of the grille protrusion portion 61 in the inclined direction of the vertical wall portion 62b, the fluid that moves diagonally upward along the vertical wall portion 62b moves to the curved portion 61a, and is then guided by the inner surface of the curved portion 61a to move to the opening 34a and inside the wall portion 34, i.e., inside the housing 2 (cover 16).

[0063] Next, an evaluation test of the louver 33 will be described. For the evaluation test of the louver 33, a louver 33 of the example was attached to a box-shaped bucket. A comparative example louver was created in which the rectangular wall 34 had a louver convex portion 61 but no louver concave portion 62, and the lower end of the opening 34a was continuous with the wall 34. The louver was then attached to the box-shaped bucket. Water was then sprayed toward the example louver 33 and the comparative example louver from a distance of 0.5 mm from each louver for three minutes, and the weight of the water that penetrated into the bucket was measured. The water was sprayed from both the front and diagonally below the louver 33. The water pressure was constant, and each louver 33 was positioned so that the wall 34 extended vertically.

[0064] When water was sprayed from the front onto the louver 33 of the embodiment and the louver of the comparative example, the amount of water that penetrated into the bucket was 60 g. In contrast, when water was sprayed from diagonally below onto the louver 33 of the embodiment and the louver of the comparative example, the amount of water that penetrated into the bucket was 260 g for the louver 33 of the embodiment and 400 g for the louver of the comparative example. In this way, the louver 33 provided with the louver recess 62 was able to suppress water penetration by approximately 35% compared to a louver without the louver recess 62. These results also make it clear that the louver 33 provided with the louver recess 62 suppresses water penetration.

[0065] In the pump device 1 using the housing 2 configured in this manner, the louver 33 is configured to have a louver convex portion 61 and a louver concave portion 62 in each of the multiple openings 34a. As a result, the fluid that passes through the openings 34a of the louver 33 and flows into the housing 2 is guided by the standing wall portion 62b of the louver concave portion 62 to move to the curved surface portion 61a of the louver convex portion 61, and is then guided by the inner surface of the curved surface portion 61a to move to the opening 34a. Therefore, the louver 33 causes the fluid to collide with the standing wall portion 62b and the curved surface portion 61a in turn, thereby preventing liquid from moving toward the opening 34a.

[0066] In this way, the standing wall portion 62b can prevent water from entering the housing 2 through the opening 34a due to collision of the water. Furthermore, even if the air contains solid matter other than water, such as dust, the solid matter also collides with the standing wall portion 62b, and therefore the solid matter can be prevented from moving toward the opening 34a. Therefore, the housing 2 and the pump device 1 using the louver 33 have high heat dissipation performance and can prevent rainwater and dust blown up from below from entering the housing 2. Therefore, the housing 2 and the pump device 1 are suitable for outdoor installation.

[0067] Furthermore, by making the standing wall portion 62b flat and perpendicular to the main surface direction of the connecting portion 62a, i.e., the direction in which the fluid is guided by the connecting portion 62a, liquids and solids collide with the standing wall portion 62b, making it easier to hinder the movement of the liquids and solids. Note that the angle between the connecting portion 62a and the outer surface of the standing wall portion 62b is preferably 90° or less to hinder the movement of liquids and solids to the secondary side.

[0068] Furthermore, by arranging the curved surface portion 61a on an extension of the standing wall portion 62b, the louver 33 can guide the air whose movement direction is guided along the standing wall portion 62b to the inner surface of the curved surface portion 61a, thereby preventing the air guided by the standing wall portion 62b from escaping to the outside. Furthermore, since the inner surface of the curved surface portion 61a is an arc-shaped curved surface, the air guided to the inner surface of the curved surface portion 61a can be guided to the opening 34a. Therefore, the louver 33 can minimize obstruction to the movement of air. Furthermore, by forming the louver protrusion 61 into the curved surface portion 61a, rather than a flat surface, the air that moves from the standing wall portion 62b is smoothly guided to the opening 34a, preventing an increase in flow path resistance.

[0069] Furthermore, since the upper end of the standing wall portion 62b of the louver recess 62 forms the lower edge of the opening 34a, the opening 34a is not blocked even when the louver recess 62 is provided, and it is possible to prevent a reduction in the opening area of ​​the opening 34a. Therefore, the louver 33 can prevent obstruction of the air flow, and it is possible to suppress a decrease in the intake and exhaust performance.

[0070] Furthermore, the height position of the lower end of the opening 34a is the same as the height position of the lower end of the curved surface portion 61a, and the height position of the upper end of the standing wall portion 62b is the same as the height positions of the lower end of the opening 34a and the lower end of the curved surface portion 61a. This makes it possible to prevent the occurrence of an undercut when molding the louver 33 using a mold such as injection molding, with the parting line (PL) of the mold oriented along the main surface of the wall portion 34. Therefore, no slide mold or the like is required for the mold used in manufacturing the louver 33, which facilitates manufacturing and reduces manufacturing costs.

[0071] Furthermore, the louver 33 has one or more ribs 63 connecting the curved surface portion 61a of the louver protrusion 61 to the connecting portion 62a and the upright wall portion 62b of the louver recess 62, thereby improving the strength of the louver protrusion 61 and the louver recess 62. Furthermore, by setting the extending direction (main surface direction) of the rib 63 along the extending direction (main surface direction) of the wall portion 34 and along a direction (horizontal direction) perpendicular to the extending direction (main surface direction) of the wall portion 34, the releasability of the molded product from the mold can be ensured, and since a slide mold or the like is not required, manufacturing is facilitated and manufacturing costs can be reduced. Furthermore, the rib 63 divides the opening 34a and the louver recess 62 in the longitudinal direction of the opening 34a, forming two flow paths from the outside of the housing 2 to the opening 34a, thereby rectifying the air flow and further suppressing an increase in flow path resistance.

[0072] Furthermore, when the louver 33 is configured to have a louver protrusion 61 and a louver recess 62 provided in each of the multiple openings 34a, the connecting portion 62a is configured to be continuous with the curved surface portion 61a that covers the opening 34a provided below. This configuration makes it possible to minimize the vertical dimension of the louver 33.

[0073] As described above, the housing 2 and the pump device 1 using the louver 33 according to the embodiment can prevent water and dust from entering.

[0074] The present invention is not limited to the above-described embodiment. For example, in the above example, the louver 33 is described as being integrally formed with the wall portions 34 of the first cover 31 and the second cover 32 of the cover 16, but the present invention is not limited to this. For example, the wall portions 34 may be formed separately from the flat plate-shaped portions of the first cover 31 and the second cover 32, and the wall portions 34 on which the louver 33 is formed may be integrally assembled by fastening or fitting into openings formed in the flat plate-shaped portions of the first cover 31 and the second cover 32.

[0075] In the above example, the louver recess 62 of the louver 33 has a connecting portion 62a and a vertical wall portion 62b. However, the louver recess 62 may have a return portion at the tip of the vertical wall portion 62b. The return portion can further hinder the movement of liquids and solids. However, it is preferable that the return portion have a height and angle that do not hinder the movement of air toward the curved surface portion 61a or create an undercut shape from the standpoint of mold releasability. When such a return portion is provided, the return portion may extend, for example, in a horizontal direction perpendicular to the main surface direction (vertical direction) of the wall portion 34, or may extend from the vertical wall portion 62b at an angle upward relative to the horizontal direction. Furthermore, the corners of the connecting portion 62a and the vertical wall portion 62b may be curved to improve air flow on the surface side.

[0076] In the above example, the pump device 1 has the base 10 on which the pump unit 11, the control panel 15, etc. are placed, and the cover 16 covers the base 10. However, the pump device 1 may have a configuration in which the installation surface on which the pump unit 11 and the control panel 15 are installed serves as the base, and the installation surface is covered with the cover 16. In other words, the pump device 1 may have a configuration in which the base is not a part of the unit, but includes another component or part of a building as the base.

[0077] In the above example, the housing 2 includes the base 10 and the cover 16 used in the pump device 1. However, the present invention is not limited to this. For example, as shown in FIGS. 9 and 10 , the housing 2 may be a control panel or an electrical panel. For example, in the example shown in FIGS. 9 and 10 , the housing 2 houses electrical equipment 103, such as an inverter and a circuit board, inside. The housing 2 includes, for example, a rectangular box-shaped main body 101 and a door 102 that opens and closes the front of the main body 101. As shown in FIG. 10 , for example, the housing 2 includes an opening formed in a side wall of the main body 101 and a louver 33 formed on a rectangular wall portion 34 and fixed to the opening. For example, the main body 101 and the door 102 are made of a metal material, and the louver 33 is made of a resin material. In this way, the louver 33 may be detachably attached to the housing 2. Furthermore, the housing 2 can be used in a variety of devices. By configuring the louver 33 to be detachable from a part of the housing 2, it is possible to use a material for the louver 33 that is different from the material for forming the housing 2 other than the louver 33.

[0078] That is, the present invention is not limited to the above-described embodiments, and various modifications can be made in the implementation stage without departing from the spirit of the invention. Furthermore, the embodiments may be implemented in appropriate combinations, in which case the combined effects can be obtained. Furthermore, the above-described embodiments include various inventions, and various inventions can be extracted by combining selected elements from the disclosed elements. For example, if the problem can be solved and the desired effect can be obtained even if some elements are deleted from all elements shown in the embodiments, the configuration from which these elements are deleted can be extracted as an invention. [Explanation of symbols]

[0079] REFERENCE SIGNS LIST 1...pump device, 2...housing, 10...base, 10a...support member, 10a1...screw hole, 11...pump unit, 12...suction pipe, 13...discharge pipe, 14...accumulator, 15...control panel, 16...cover, 21...motor, 21a...fan cover, 21a1...suction port, 22...pump, 22a...pump casing, 22b...leg, 31...first cover, 32...second cover, 33...louver, 34...wall portion, 34a...opening, 41...first side wall, 41a...first recess, 41b...second recess, 41c...seat portion, 41c1...hole, 41d...first slit, 41e...first insertion portion, 42...second side wall, 42a...opening, 42b...panel, 43...first ceiling wall, 43a... Third recess, 43b...engagement protrusion, 43b1...outer surface, 43c...corner portion, 44...first flange, 44a...hole, 51...third side wall, 51a...fourth recess, 51b...fifth recess, 51c...seat portion, 51c1...hole, 51d...second slit, 51e...second insertion portion, 52...fourth side wall, 52a...window portion, 52b...third slit, 52c...fourth slit, 53...second top wall, 53a...sixth recess, 53b...protrusion, 53c...corner portion, 54...second flange, 54a...hole, 61...louver protrusion, 61a...curved surface portion, 61b...side surface portion, 62...louver recess, 62a...connection portion, 62b...standing wall portion, 62c...side surface portion, 63...rib, 101...main body, 102...door, 103...electrical equipment.

Claims

1. A louver provided in a housing, a wall portion formed integrally with the housing or fixed to a part of the housing, the wall portion having a rectangular shape that is elongated in one direction and a rectangular opening; a louvered protrusion having a curved surface portion that extends from an upper edge of the opening of the wall portion toward the outside of the housing and covers the outside of the opening; a connecting portion formed on the wall portion and inclined toward the inside and upward of the housing; and a grille recess formed integrally with the connecting portion and inclined toward the wall portion and the upward, the upper end of which constitutes a lower edge of the opening and which has a standing wall portion at the same height as the tip of the curved portion. A louver equipped with:

2. The louver according to claim 1 , wherein the standing wall portion is formed from a position further inward than the wall portion of the housing to the wall portion in a direction perpendicular to a direction of a main surface of the wall portion.

3. The openings are formed in the wall portion in a plurality of rows in a direction perpendicular to the one direction, The louver according to claim 1 , wherein the louver protrusions and the louver recesses are provided in the plurality of openings, respectively.

4. The louver according to claim 3 , wherein the connecting portion is continuous with the curved surface portion provided on the upper edge of the opening disposed below.

5. The louver according to claim 1 , wherein the louver recess has a return portion extending from an upper end of the upright wall portion in a direction perpendicular to a main surface direction of the wall portion.

6. A housing comprising the louver according to any one of claims 1 to 5, for accommodating equipment therein.

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