Waste liquid collecting apparatus and flux applying apparatus using the same

Abstract

To provide a waste liquid recovery device easy to maintain.SOLUTION: The waste liquid recovery device 10 capable of recovering the waste liquid which is the surplus of the flux liquid applied to the inverter cooler 90 includes a recovery part 60 and a discharge part 70. The recovery unit 60 includes a recovery unit main body 61, an inlet opening portion 62 which communicates the inside and the outside of the recovery unit main body 61 and through which a fluid containing the waste liquid can flow, and an outlet opening portion 63 which communicates the inside and the outside of the recovery unit main body 61. The discharge portion 70 includes a tubular portion 71 having one end connected to the outlet opening portion 63 and a return portion 72 extending radially inward from an inner peripheral wall of the tubular portion 71, and is capable of discharging the fluid inside the collection portion main body 61.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a waste liquid recovery device and a flux application device using the same. [Background technology]

[0002] 2. Description of the Related Art Conventionally, waste liquid recovery devices are known that can recover waste liquid, which is excess flux liquid that has been applied to a flux application target.

[0003] For example, in the waste liquid recovery device of Patent Document 1, when a flux application device sprays flux liquid onto a flux application target, the excess atomized flux liquid is sucked in by a suction part, and discharged into a recovery part (a hollow sealed container) for recovery. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 6-328021 Summary of the Invention [Problem to be solved by the invention]

[0005] The recovery section (hollow sealed container) of the waste liquid recovery device of Patent Document 1 is provided with an exhaust port that connects the internal space of the recovery section with the outside. The exhaust port is also provided with multiple air filters. With this configuration, air that flows into the internal space of the recovery section passes through the multiple air filters and is released to the outside from the exhaust port. At this time, the air filters capture flux components contained in the air flow, and only the air is released to the outside, thereby preventing a deterioration in the working environment.

[0006] However, in the waste liquid recovery device of Patent Document 1, the air filter may become clogged with flux components, which may require frequent replacement of the air filter.

[0007] An object of the present invention is to provide a waste liquid recovery device that is easy to maintain, and a flux application device using the same. [Means for solving the problem]

[0008] The present invention provides a waste liquid recovery device capable of recovering waste liquid, which is excess flux liquid applied to a flux application target (90), and includes a recovery section (60) and a discharge section (70). The recovery section has a recovery section main body (61), an inlet opening (62) that communicates the inside and outside of the recovery section main body and allows a fluid containing the waste liquid to flow through, and an outlet opening (63) that communicates the inside and outside of the recovery section main body. The discharge section has a tubular section (71) with one end connected to the outlet opening and a return section (72) that extends radially inward from the inner circumferential wall of the tubular section, and is capable of discharging fluid from inside the recovery section main body.

[0009] In the present invention, even if waste liquid scattered from inside the collection unit main body or atomized waste liquid passes through the outlet opening, it adheres to the return part and drips, thereby preventing the waste liquid from being discharged outside the collection unit. Furthermore, unlike the waste liquid collection device of Patent Document 1, the present invention does not have an air filter that blocks the tubular part in the discharge unit. Therefore, there is no need for maintenance such as replacing the air filter due to clogging. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a schematic diagram showing a waste liquid recovery device according to an embodiment and a flux application device using the same; [Figure 2] FIG. 1A is a perspective view showing an object to be fluxed, and FIGS. 1B to 1D are perspective views showing components that constitute the object to be fluxed. [Figure 3] FIG. 1 is a cross-sectional view showing a portion of a waste liquid recovery device according to an embodiment. [Figure 4] Cross-sectional view of line IV-IV in Figure 3. [Figure 5] 1A and 1B are diagrams showing a discharge part of a waste liquid recovery device according to an embodiment, in which FIG. 1A is a cross-sectional view and FIG. 1B is a cross-sectional perspective view. [Figure 6]FIG. 1 is a schematic diagram showing a waste liquid recovery device according to a first comparative embodiment. [Figure 7] FIG. 10 is a schematic diagram showing a waste liquid recovery device according to a second comparative embodiment. [Figure 8] FIG. 10 is a schematic diagram showing a waste liquid recovery device according to a third comparative embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0011] The following describes a waste liquid recovery device according to one embodiment, a flux application device using the same, and waste liquid recovery devices according to several comparative embodiments, with reference to the drawings. Note that substantially the same components in the embodiment and the comparative embodiments are designated by the same reference numerals, and their descriptions will be omitted. <1> A number enclosed in "<" and ">" indicates the beginning of the section describing the content of the invention (including related matters) claimed in the claim of the paragraph number (at the time of filing) corresponding to the number.

[0012] (One embodiment) A waste liquid recovery device according to one embodiment and a flux application device using the same are shown in Figure 1. The flux application device 1 is a device for applying flux liquid to an inverter cooler 90, which is a "flux application target." The waste liquid recovery device 10 is a device for recovering waste liquid, which is excess flux liquid applied to the inverter cooler 90.

[0013] The inverter cooler 90 as the "subject to be coated with flux" will be described below.

[0014] The inverter cooler 90 is used, for example, to cool a power element module (power card) of an inverter that converts power to a vehicle drive motor. As shown in FIG. 1 , the inverter cooler 90 has a coating target body 900, a coating target inlet 901, and a coating target outlet 902. The coating target body 900 is formed hollow, for example, from aluminum. The coating target inlet 901 is formed in the coating target body 900 so as to connect the inside and outside of the coating target body 900. The coating target outlet 902 is formed in the coating target body 900 at a position different from the coating target inlet 901 so as to connect the inside and outside of the coating target body 900.

[0015] 2(A), the application target body 900 of the inverter cooler 90 has a pipe 91, an intermediate tube unit 92, and a bottom tube unit 93. The application target body 900 is formed by assembling two pipes 91, three intermediate tube units 92, and one bottom tube unit 93.

[0016] As shown in FIG. 2(B), the pipe 91 is made of, for example, aluminum and has a cylindrical shape.

[0017] As shown in FIG. 2(C), the intermediate tube unit 92 is made of, for example, aluminum and includes one intermediate tube unit main body 921, two upper cylindrical portions 922, and two lower cylindrical portions 923. The intermediate tube unit main body 921 is formed in the shape of a hollow, long plate. The upper cylindrical portion 922 is formed to extend cylindrically from openings formed at both longitudinal ends of one surface of the intermediate tube unit main body 921. The lower cylindrical portion 923 is formed to extend cylindrically from openings formed at both longitudinal ends of the other surface of the intermediate tube unit main body 921. As a result, the interior and exterior of the intermediate tube unit main body 921 are in communication via the two upper cylindrical portions 922 and the two lower cylindrical portions 923.

[0018] 2(D), the bottom tube unit 93 is made of, for example, aluminum and includes one bottom tube unit main body 931 and two upper cylindrical portions 932. The bottom tube unit main body 931 is formed in the shape of a hollow, long plate. The upper cylindrical portions 932 are formed so as to extend in a cylindrical shape from openings formed at both longitudinal ends of one surface of the bottom tube unit main body 931. As a result, the interior and exterior of the bottom tube unit main body 931 are in communication via the two upper cylindrical portions 932.

[0019] The pipe 91 is assembled so that the upper cylindrical portion 922 of the intermediate tube unit 92 fits inside one end of the pipe 91. The (first) intermediate tube unit 92 to which the pipe 91 is assembled is then assembled so that the upper cylindrical portion 932 of another (second) intermediate tube unit 92 fits outside the lower cylindrical portion 923. The (second) intermediate tube unit 92 is then assembled so that the upper cylindrical portion 932 of yet another (third) intermediate tube unit 92 fits outside the lower cylindrical portion 923. The (third) intermediate tube unit 92 is then assembled so that the upper cylindrical portion 932 of the bottom tube unit 93 fits outside the lower cylindrical portion 923.

[0020] The above-described assembly results in the formation of a hollow coating target body 900 having a coating target inlet 901 and a coating target outlet 902. In this embodiment, a flux liquid is applied to the inner wall of the assembled coating target body 900 using a flux application device 1 (described later), and the oxide film on the surface of the aluminum material is removed before brazing. This completes the brazing of the inverter cooler 90, which is made up of multiple components.

[0021] In this embodiment, the flux liquid is applied to the inner wall of the application target body 900 after a plurality of components are assembled. Therefore, compared to the case where the flux liquid is applied to each component before assembly, the number of flux application devices required can be reduced to one, and the flux application process can be simplified.

[0022] The flux application device 1 will now be described.

[0023] 1, the flux application device 1 includes a storage section 20, an inlet pipe section 30, an outlet pipe section 40, a waste liquid recovery device 10, etc. The storage section 20 is a container having a predetermined volume. The storage section 20 is capable of storing a solution of flux powder and water (hereinafter referred to as "flux liquid").

[0024] The inlet pipe section 30 has an inlet connection pipe 31 and an inlet insertion pipe 32. The inlet connection pipe 31 is formed in a tubular shape from a flexible material such as rubber. One end of the inlet connection pipe 31 is connected to a hole formed in the bottom of the storage section 20. This allows the flux liquid stored in the storage section 20 to flow into the inlet connection pipe 31.

[0025] The inlet side insertion pipe 32 is formed into a cylindrical shape from, for example, metal or resin. One end of the inlet side insertion pipe 32 is connected to the other end of the inlet side connection pipe 31. This allows the flux liquid that flows into the inlet side connection pipe 31 to flow into the inlet side insertion pipe 32. The opening at the other end of the inlet side insertion pipe 32 is closed. A plurality of nozzle holes 321 are formed at the other end of the inlet side insertion pipe 32, connecting the inner and outer circumferential walls and communicating the inside and outside of the inlet side insertion pipe 32. This allows the flux liquid inside the inlet side insertion pipe 32 to flow out of the inlet side insertion pipe 32 through the nozzle holes 321.

[0026] When applying flux liquid to the inverter cooler 90, the inlet-side insertion pipe 32 is inserted from the other end into the application target inlet portion 901. After the other end of the inlet-side insertion pipe 32 is positioned inside the bottom tube unit 93, the internal space of the reservoir 20 is pressurized by a pump (not shown) or the like. This causes the flux liquid to be sprayed in atomized form from the nozzle holes 321. By moving the inlet-side insertion pipe 32 in the direction opposite to the insertion direction while the flux liquid is being sprayed from the nozzle holes 321, the flux liquid can be applied evenly to the inner wall of the application target main body 900 and the joints between the pipe 91, the intermediate tube unit 92, and the bottom tube unit 93.

[0027] The outlet-side pipe section 40 has an outlet-side connecting pipe 41 and an outlet-side insert pipe 42. The outlet-side connecting pipe 41 is formed in a tubular shape from a flexible material such as rubber. One end of the outlet-side connecting pipe 41 is connected to a suction section 53 of the aspirator 50 (described later).

[0028] The outlet-side insertion pipe 42 is formed into a cylindrical shape from, for example, metal or resin. One end of the outlet-side insertion pipe 42 is connected to the other end of the outlet-side connection pipe 41. When applying flux liquid to the inverter cooler 90, the other end of the outlet-side insertion pipe 42 is inserted into the application target outlet 902. When the flux liquid is being sprayed from the nozzle hole 321 of the inlet-side insertion pipe 42, the aspirator 50 is activated, and the atomized flux liquid present inside the application target body 900, i.e., the excess flux liquid applied to the inverter cooler 90, is sucked into the aspirator 50 via the outlet-side insertion pipe 42 and the outlet-side connection pipe 41.

[0029] The waste liquid recovery device 10 will now be described.

[0030] 1, the waste liquid recovery device 10 includes an aspirator 50, a recovery unit 60, and a discharge unit 70. The aspirator 50 is, for example, an aspirator or an ejector, and includes an aspirator body 51, a fluid introduction unit 52, a suction unit 53, a discharge unit 54, a discharge pipe 55, and the like.

[0031] The aspirator main body 51 has a suction chamber 510 formed therein. The fluid introduction part 52 is formed in a cylindrical shape and is connected to the aspirator main body 51. One end of the fluid introduction part 52 is located in the suction chamber 510. One end of the fluid introduction part 52 is formed so as to decrease in diameter from the other end side toward the one end side.

[0032] The suction section 53 is formed in the suction device body 51 so as to communicate between the suction chamber 510 and the outside of the suction device body 51. One end of the outlet side connecting pipe 41 is connected to the suction section 53.

[0033] The discharge part 54 is formed in a cylindrical shape and is connected to the aspirator main body 51. The discharge part 54 is provided approximately coaxially with the fluid introduction part 52 so that one end of the discharge part 54 faces one end of the fluid introduction part 52 in the suction chamber 510 with a predetermined gap therebetween.

[0034] The discharge pipe 55 is formed in a tubular shape. One end of the discharge pipe 55 is connected to the other end of the discharge section 54. The other end of the discharge pipe 55 is connected to an inlet opening 62 of a recovery section 60 (described later).

[0035] In this embodiment, when applying flux liquid to the inverter cooler 90, compressed air is supplied to the other end of the fluid inlet 52 while the flux liquid is being sprayed from the nozzle 321. This causes high-speed air to flow out of one end of the fluid inlet 52 and into one end of the discharge port 54. As a result, negative pressure is generated in the suction chamber 510, and the air (fluid) containing the flux liquid in the outlet-side connecting pipe 41 is drawn into the suction chamber 510 via the suction port 53. The air drawn into the suction chamber 510 flows into one end of the discharge port 54 together with air flowing from the fluid inlet 52 toward the discharge port 54, flows through the discharge pipe 55, and is discharged from the other end of the discharge pipe 55. By continuing to supply compressed air to the fluid inlet 52, the atomized flux liquid present inside the application target body 900, i.e., the excess flux liquid applied to the inverter cooler 90, is sucked into the suction device 50 via the outlet-side insertion pipe 42 and the outlet-side connecting pipe 41 and discharged from the discharge pipe 55.

[0036] As shown in FIGS. 3 and 4, the collection unit 60 includes a collection unit main body 61, an inlet opening 62, an outlet opening 63, a plate portion 64, a plate portion 65, etc. The collection unit main body 61 is formed in a rectangular box shape (cuboid shape) having an internal space. The collection unit main body 61 includes an upper wall 611, a bottom wall 612, a side wall 613, a side wall 614, a side wall 615, and a side wall 616. The upper wall 611, the bottom wall 612, the side wall 613, the side wall 614, the side wall 615, and the side wall 616 are all formed in a rectangular plate shape. One side of the side wall 613, the side wall 614, the side wall 615, and the side wall 616 is joined to each of the four sides of the upper wall 611. Adjacent sides of the side wall 613, the side wall 614, the side wall 615, and the side wall 616 are joined to each other. The bottom wall 612 is provided on the opposite side of the top wall 611 so that one side of the side wall 613, the side wall 614, the side wall 615, and the side wall 616 are joined to each of the four sides. This forms a collection chamber 610 inside the collection unit main body 61.

[0037] The collection unit main body 61 is installed, for example, so that the bottom wall 612 abuts against the floor 2. As a result, the upper wall 611 is positioned above the bottom wall 612 in the vertical direction.

[0038] The inlet opening 62 is formed in the upper wall 611 to connect the inside of the collection unit main body 61, i.e., the collection chamber 610, with the outside. More specifically, the inlet opening 62 is formed on the side wall 613 side of the center of the upper wall 611. In this embodiment, the inlet opening 62 is formed, for example, in a circular shape. The other end of the discharge pipe 55 of the suction device 50 is connected to the inlet opening 62. As a result, the excess flux liquid (fluid) applied to the inverter cooler 90 is sucked into the suction device 50, flows through the discharge pipe 55, and is sprayed from the inlet opening 62 into the collection chamber 610 (see FIG. 3). The fluid sprayed from the inlet opening 62 into the collection chamber 610 is a gas-liquid mixture of the flux liquid and air.

[0039] The outlet opening 63 is formed in the upper wall 611 so as to connect the inside of the collection unit main body 61, i.e., the collection chamber 610, with the outside. More specifically, the outlet opening 63 is formed on the side wall 615 side with respect to the center of the upper wall 611. In this embodiment, the outlet opening 63 is formed, for example, in a circular shape.

[0040] The plate portions 64 and 65 are formed, for example, in the shape of a rectangular plate. The plate portion 64 rises substantially perpendicularly from the bottom wall 612 and is provided in the collection chamber 610 so as to be parallel to the side walls 613 and 615 (see FIG. 3). Of the four sides of the plate portion 64, two sides adjacent to the side that contacts the bottom wall 612 are connected to the side walls 614 and 616, respectively (see FIG. 4). In addition, the upper side of the plate portion 64 in the vertical direction is spaced apart from the upper wall 611 (see FIG. 3).

[0041] Plate portion 65 is provided in collection chamber 610 so as to extend substantially perpendicularly downward from upper wall 611 and be parallel to side walls 613 and 615 (see FIG. 3). Of the four sides of plate portion 65, two sides adjacent to the side that contacts upper wall 611 are connected to side walls 614 and 616, respectively (see FIG. 4). In addition, the lower vertical side of plate portion 65 is spaced apart from bottom wall 612 (see FIG. 3). Plate portion 65 is provided on the outlet opening 63 side relative to plate portion 64 (see FIGS. 3 and 4).

[0042] Here, if the vertical size of recovery chamber 610, i.e., the height, is h1, the vertical size of plate portion 64 is t1, the vertical size of plate portion 65 is t2, the vertical distance between plate portions 64 and 65 is d1, and the horizontal distance between plate portions 64 and 65 is d2, then h1>t1>t2>d2>d1, and h1=t1+d1+h2. Note that t1 is preferably about 4.6 to 4.7 times larger than t2.

[0043] As shown in Fig. 5, the discharge section 70 has a tubular section 71 and a return section 72. The tubular section 71 is formed, for example, in a cylindrical shape. One end of the tubular section 71 is provided to connect to the outlet opening 63 of the collection section 60 (see Figs. 3 and 4). The return sections 72 are formed in the shape of a substantially semicircular plate, and a plurality of return sections 72 are provided inside the tubular section 71. In this embodiment, eight return sections 72 are provided.

[0044] The return portion 72 is formed to extend radially inward from the inner circumferential wall of the cylindrical portion 71. More specifically, the return portion 72 extends radially inward and vertically downward from the inner circumferential wall of the cylindrical portion 71, and is formed to be inclined with respect to a line L1 that is parallel to the axis Ax1 of the cylindrical portion 71 (see FIG. 5(A)). Therefore, the angle θ formed between the line L1 and the return portion 72 is less than 90 degrees.

[0045] The eight return portions 72 are spaced apart at 90-degree intervals in the circumferential direction of the inner peripheral wall of the cylindrical portion 71 and are arranged at predetermined intervals in the axial direction of the cylindrical portion 71 (see FIG. 5). For convenience, in FIG. 5, the eight return portions 72 are numbered 721 to 728 in order from the bottom to the top in the vertical direction.

[0046] 4, in this embodiment, the area S2 of the region surrounded by the linear sides of one return portion 72 and the inner peripheral wall of the tubular portion 71 (the region indicated by the large grid), i.e., the minimum flow path area of ​​the discharge portion 70, is set to be larger than the area S1 of the circular region surrounded by the inner peripheral wall of the discharge pipe 55 at the inlet opening 62 (the region indicated by the large grid). Note that the area S3 of the rectangular region surrounded by the linear sides of the four return portions 72 (the region indicated by the small grid) is also set to be larger than the area S1. This makes it possible to prevent the flow of fluid flowing from the inlet opening 62 into the collection chamber 610 from being obstructed.

[0047] 3, the fluid (a gas-liquid mixture of flux liquid and air) ejected from the inlet opening 62 into the collection chamber 610 collides with the inner walls of the collection unit main body 61, such as the bottom wall 612 located vertically below the inlet opening 62. As a result, the flux liquid (waste liquid) accumulates in the space surrounded by the bottom wall 612, the side wall 613, the side wall 614, the plate portion 64, and the side wall 616. When the surface of the flux liquid accumulated in this space exceeds the vertical upper edge of the plate portion 64, the flux liquid accumulates in the space surrounded by the bottom wall 612, the side wall 615, the side wall 616, the plate portion 64, and the side wall 614.

[0048] In this embodiment, it is assumed that the atomized flux liquid flows from the inlet opening 62 side to the outlet opening 63 side. The atomized flux liquid flowing from the inlet opening 62 side to the outlet opening 63 side comes into contact with the plate portions 64 and 65, turns into droplets, and falls toward the bottom wall 612 side. Even if the flux liquid flowing in from the inlet opening 62 splashes violently in the recovery chamber 610, the splashes of the flux liquid can be prevented from reaching the outlet opening 63 by being blocked by the plate portions 64 and 65.

[0049] Furthermore, in this embodiment, even if atomized flux liquid is contained in the air passing from inside the collection chamber 610 through the discharge part 70, the atomized flux liquid comes into contact with the return part 72, turns into droplets, and falls toward the bottom wall 612. Furthermore, even if the flux liquid violently splashes in the collection chamber 610, the return part 72 blocks the flux liquid, thereby preventing the flux liquid from passing through the discharge part 70 and splashing to the outside.

[0050] Next, a comparative example of a waste liquid recovery device will be described to clarify the advantages of this embodiment.

[0051] 6, in the first comparative embodiment, the collection section 60 is not formed with an outlet opening 63, and is not provided with a discharge section 70. Therefore, the collection chamber 610 is sealed, and as the fluid (a gas-liquid mixture of flux liquid and air) is ejected into the collection chamber 610 from the inlet opening 62, the pressure in the collection chamber 610 may become high. This may result in a decrease in the performance of the aspirator 50, making it difficult for the waste liquid collection device to collect the waste liquid.

[0052] 7, in the second comparative embodiment, the collection unit 60 is formed with an outlet opening 63, but is not provided with a discharge unit 70. Therefore, although the deterioration in performance of the aspirator 50, which is a concern in the first comparative embodiment, can be avoided, there is a risk that the waste liquid in the collection chamber 610 will splash outside via the outlet opening 63. The waste liquid that splashes outside contains flux, which may solidify and make cleaning difficult.

[0053] 8, in the third comparative embodiment, the collection section 60 is formed with an outlet opening 63, and although the discharge section 70 is not provided, an air filter 3 is provided at the outlet opening 63. The air filter 3 is capable of capturing foreign matter such as flux liquid contained in the passing air. In the third comparative embodiment, the deterioration in performance of the suction device 50, which is a concern in the first comparative embodiment, can be avoided, and the splashing of waste liquid to the outside, which is a concern in the second comparative embodiment, can be suppressed. However, there is a risk that the air filter 3 will become clogged with flux components, and that the air filter 3 will need to be replaced more frequently.

[0054] On the other hand, in this embodiment, by providing a discharge section 70 having a return section 72 on the inside at the outlet opening 63, it is possible to avoid the deterioration in performance of the suction device 50 that was a concern in the first comparative embodiment, to suppress the splashing of waste liquid to the outside that was a concern in the second comparative embodiment, and to avoid the burdensome maintenance such as frequent replacement of air filters, etc. that was a concern in the third comparative embodiment.

[0055] As explained above, <1> This embodiment relates to a waste liquid recovery device 10 capable of recovering waste liquid, which is an excess of flux liquid applied to an inverter cooler 90 as a “flux application target,” and includes a recovery unit 60 and a discharge unit 70. The recovery unit 60 has a recovery unit main body 61, an inlet opening 62 that communicates the inside and outside of the recovery unit main body 61 and allows a fluid including the waste liquid to flow therethrough, and an outlet opening 63 that communicates the inside and outside of the recovery unit main body 61. The discharge unit 70 has a tubular portion 71 having one end connected to the outlet opening 63 and a return portion 72 that extends radially inward from the inner circumferential wall of the tubular portion 71, and is capable of discharging the fluid inside the recovery unit main body 61.

[0056] In this embodiment, even if waste liquid scattered from inside the collection unit main body 61 or atomized waste liquid passes through the outlet opening 63, it adheres to the return portion 72 and drips, thereby preventing the waste liquid from being discharged to the outside of the collection unit 60. Furthermore, in this embodiment, unlike the waste liquid collection device of Patent Document 1 (JP-A-6-328021), the discharge unit 70 is not provided with an air filter that blocks the tubular portion 71. Therefore, there is no need for maintenance such as replacing the air filter due to clogging.

[0057] Also, <2> In this embodiment, the return portion 72 extends radially inward and vertically downward from the inner circumferential wall of the cylindrical portion 71 and is formed so as to be inclined with respect to a straight line L1 parallel to the axis Ax1 of the cylindrical portion 71.

[0058] Therefore, the waste liquid adhering to the return portion 72 can be smoothly dripped off.

[0059] Also, <3> In this embodiment, the collection unit 60 further includes plate portions 64 and 65 extending in a plate-like shape from the inner wall of the collection unit main body 61 .

[0060] In this embodiment, it is assumed that atomized flux liquid flows from the inlet opening 62 side to the outlet opening 63 side. The atomized flux liquid flowing from the inlet opening 62 side to the outlet opening 63 side comes into contact with the plate parts 64 and 65 and falls as droplets. Furthermore, even if the flux liquid flowing in from the inlet opening 62 splashes violently inside the collection part main body 61, the splashes of the flux liquid can be prevented from reaching the outlet opening 63 by being blocked by the plate parts 64 and 65.

[0061] Also, <4> This embodiment further includes an aspirator 50. The aspirator 50 has an inhalation section 53 that can inhale a fluid containing waste liquid, and can discharge the fluid containing waste liquid sucked from the inhalation section 53 into the inside of the collection section main body 61 via an inlet opening 62.

[0062] The aspirator 50 allows the waste liquid to be collected efficiently.

[0063] Also, <5> In this embodiment, an inverter cooler 90 as a "flux application target" has a flux application target body 900, a flux application target inlet section 901 that communicates the inside and outside of the flux application target body 900, and a flux application target outlet section 902 that communicates the inside and outside of the flux application target body 900. This embodiment is a flux application device 1 that includes the waste liquid recovery device 10, the storage section 20, the inlet-side pipe section 30, and the outlet-side pipe section 40 described above.

[0064] The storage section 20 is capable of storing flux liquid. One end of the inlet-side pipe section 30 is connected to the storage section 20, and the other end is inserted into or connected to the inlet section 901 of the coating object, so that the flux liquid stored in the storage section 20 can be sprayed from the other end to coat the inner wall of the coating object body 900. The outlet-side pipe section 40 is connected to the suction section 53 at one end, and the other end is inserted into or connected to the outlet section 902 of the coating object.

[0065] The flux application device 1 of this embodiment can efficiently apply flux liquid to the inner wall of the application target body 900. Furthermore, since the flux application device 1 of this embodiment is provided with the waste liquid recovery device 10, it can efficiently recover waste liquid without increasing the maintenance load.

[0066] (Other embodiments) In the above-described embodiment, an example has been shown in which the inlet opening of the collection unit is formed in the upper wall (upper wall 611) on the vertically upper side of the collection unit main body. In contrast to this, in other embodiments, the inlet opening may be formed in a side wall (side walls 613, 614, 615, 616) of the collection unit main body. Furthermore, in other embodiments, the collection unit (collection unit main body) is not limited to a rectangular box shape (cuboid shape), and may be any shape such as a cylindrical shape or a polygonal tube shape, as long as it has an internal space.

[0067] In the above-described embodiment, the discharge section has eight return portions inside the cylindrical section. However, in other embodiments, any number of return portions may be provided as long as the number is one or more. However, from the viewpoint of preventing the waste liquid containing the flux liquid from being released or splashed to the outside in the collection section, it is preferable that a plurality of return portions are provided in the circumferential and / or axial directions on the inner peripheral wall of the cylindrical section.

[0068] In the above-described embodiment, the return portion of the discharge portion extends radially inward and vertically downward from the inner circumferential wall of the tubular portion and is inclined with respect to a line parallel to the axis of the tubular portion, i.e., the angle between the line and the return portion is less than 90 degrees. In contrast, in other embodiments, the return portion does not have to extend vertically downward as long as it extends radially inward from the inner circumferential wall of the tubular portion. That is, the return portion may extend radially inward and horizontally from the inner circumferential wall of the tubular portion, or may extend radially inward and vertically upward from the inner circumferential wall of the tubular portion. In this case, the angle between the line and the return portion is greater than or equal to 90 degrees and less than 180 degrees.

[0069] In other embodiments, any number of plate portions may be provided extending from the inner wall of the collection portion main body of the collection portion. In other embodiments, the collection portion may not be provided with any plate portions.

[0070] In the above-described embodiment, the suction device supplies compressed air to the fluid introduction portion, i.e., is an ejector. However, in other embodiments, a liquid such as pressurized water may be supplied to the fluid introduction portion. In other words, the suction device may be an aspirator. In other embodiments, the suction device is not limited to an aspirator or an ejector, and may be one that uses a pump or the like to draw in a fluid from a suction portion and discharge it from a discharge portion.

[0071] In another embodiment, the waste liquid recovery device may not include a suction device. In this case, a flux application device having a waste liquid recovery device without a suction device may be envisioned. Note that, from the viewpoint of efficiently recovering the flux liquid waste, it is preferable that the waste liquid recovery device include a suction device.

[0072] In another embodiment, the waste liquid recovery device may be used not only to recover excess flux liquid applied to the inner wall of a hollow target body having an inlet and an outlet, such as an inverter cooler, but also to recover excess flux liquid applied to a surface other than the inner wall of a hollow target body, such as the surface of a substrate.

[0073] As such, the present disclosure is not limited to the above-described embodiments, and can be implemented in various forms without departing from the spirit of the present disclosure. [Explanation of symbols]

[0074] 10 waste liquid recovery device, 60 recovery section, 61 recovery section body, 62 inlet opening, 63 outlet opening, 70 discharge section, 71 tube section, 72 return section, 90 inverter cooler (subject to be flux coated)

Claims

1. A waste liquid recovery device capable of recovering waste liquid that is an excess of flux liquid applied to a flux application target (90), a collection section (60) having a collection section main body (61), an inlet opening (62) communicating the inside and outside of the collection section main body and allowing a fluid containing the waste liquid to flow therethrough, and an outlet opening (63) communicating the inside and outside of the collection section main body; a discharge section (70) having a cylindrical section (71) whose one end is connected to the outlet opening and a return section (72) extending radially inward from an inner peripheral wall of the cylindrical section, and capable of discharging fluid inside the recovery section main body; A waste liquid recovery device comprising:

2. The waste liquid recovery device according to claim 1, wherein the return portion extends radially inward and vertically downward from the inner peripheral wall of the cylindrical portion and is formed so as to be inclined with respect to a straight line (L1) parallel to the axis (Ax1) of the cylindrical portion.

3. 3. The waste liquid recovery device according to claim 1, wherein the recovery section further comprises a plate portion (64, 65) extending in a plate shape from an inner wall of the recovery section main body.

4. The waste liquid recovery device according to claim 1 or 2, further comprising an aspirator (50) having an intake section (53) capable of inhaling a fluid containing the waste liquid, and capable of discharging the fluid containing the waste liquid inhaled from the intake section into the inside of the recovery section main body via the inlet opening.

5. The flux application target has a flux application target body (900), a flux application target inlet portion (901) that communicates the inside and outside of the flux application target body, and a flux application target outlet portion (902) that communicates the inside and outside of the flux application target body, The waste liquid recovery device according to claim 4; a storage section (20) capable of storing a flux liquid; an inlet-side pipe portion (30) having one end connected to the reservoir portion and the other end inserted or connected to the inlet portion of the object to be coated, and capable of spraying the flux liquid stored in the reservoir portion from the other end side to coat the inner wall of the object to be coated; an outlet-side pipe portion (40) having one end connected to the suction portion and the other end inserted into or connected to the application target outlet portion; A flux application device comprising:

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