Stirring device

ES3078648T3Undetermined Publication Date: 2026-09-15LG ENERGY SOLUTION LTD (100 00)
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Patent Information

Application Number
ES2023831924T
Authority / Receiving Office
ES · ES
Patent Type
Patents
Current Assignee / Owner
Priority Date
2022-07-01
Filing Date
2023-06-29
Publication Date
2026-09-15
Estimated Expiration
2043-06-29

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Abstract

An agitation device, according to one embodiment, comprises: a container; a cleaning solution supply unit for supplying a cleaning solution to the container; a first agitation unit including a first stirring rod located within the container, and having a suction conduit provided within the first stirring rod and a plurality of suction ports connecting the suction conduit to the interior space of the container so as to allow fluid movement, wherein the cleaning solution within the container is drawn in by the plurality of suction ports; a second agitation unit including a second stirring rod located within the container, and having a discharge conduit provided within the second stirring rod and a plurality of discharge ports connecting the discharge conduit to the interior space of the container so as to allow fluid movement;and a cleaning solution circulation unit that is connected to the suction duct and the discharge duct and configured to supply the discharge duct with the cleaning solution that has flowed through the suction duct.
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Description

Stirring device Technology sector The present invention relates to a stirring device and, more particularly, to a stirring device capable of stirring raw materials for a suspension during a mixing process and of automatically cleaning the entire space of a container when the container is cleaned. This application claims the benefit of priority based on Korean Patent Application No. 10-2022-0081377, dated July 1, 2022. Background of the invention Secondary batteries are batteries that can be charged and discharged, unlike primary batteries which cannot be charged, and are widely used as power sources for electronic devices such as mobile phones and laptops, or electric vehicles, and the like. A secondary battery manufacturing process comprises an electrode manufacturing process, an electrode assembly process, and a forming process. The electrode manufacturing process is a process for producing an electrode used in a secondary battery. The electrode manufacturing process comprises a mixing process, a slurry coating process, a drying process, a rolling process, a strip cutting process, and a notching process. The mixing process in electrode manufacturing involves agitating raw materials in suspension. During mixing, these suspended raw materials are introduced into a container and stirred to form a suspension. The suspended raw materials include an active material, a conductive agent, a binder, a solvent, and similar components. The mixing process is carried out in a stirring device. After producing the same type of suspension in a certain quantity, or before preparing a different type of suspension from the existing suspension, the container is cleaned. Figure 1 is a diagram to explain a container cleaning process (11) according to conventional technology. The stirring device (10) comprises a container (11), a stirring rod (12), a stirring paddle (13), and a stirring motor (14). In general, the method for cleaning the container (11) that performs the suspension mixing process is as follows. A certain quantity of cleaning fluid (W1) is introduced into the container (11). When the cleaning fluid (W1) is introduced into the container (11), the stirring rod (12) is rotated while the stirring motor (14) is driven. As the stirring rod (12) rotates, the cleaning fluid (W1) in the container (11) is agitated by the stirring paddle (13) and cleans the lower space (A1) of the container (11) as vortices are formed. The cleaning range of the container (11) is the range affected by the vortices of the cleaning fluid (W1) when the stirring rod (12) is rotated. Consequently, even if the cleaning operation is performed repeatedly, the cleaning fluid (W1) does not reach the upper space (A2) of the container (11), making it difficult to clean the entire space of the container (11) uniformly. Therefore, conventionally, the area that the cleaning fluid (W1) does not reach when the cleaning fluid (W1) is agitated, primarily the upper space (A2) of the container (11), is manually cleaned by a worker. After manually cleaning the container (11), the agitation device (10) is stopped. Consequently, after the cleaning operation is complete, the agitation device (10) is restarted, but this requires additional time beyond the manual cleaning time. Additionally, the cleaning time required to clean the container (11) varies depending on the worker's skill level. This can negatively impact the operational efficiency of the mixing process. Document WO 2013 / 024065 A1 discloses a filtering apparatus and a method for mixing, extraction and / or separation, and discloses the preamble of claims 1 and 10. Explanation of the invention Technical problem The present invention is intended to provide a stirring device capable of automatically cleaning the entire space of a container when the container is being cleaned. Additionally, the present invention is intended to provide an agitation device capable of cleaning the lower space of a container while agitating a cleaning liquid within the container during cleaning, and cleaning the upper space of the container as the cleaning liquid in the container is sprayed into the upper space while circulating through a cleaning liquid circulation section. Technical solution An agitation device according to an example of the present invention is set forth in appended claim 1. In this case, the plurality of suction holes may be located at a lower height than the plurality of discharge holes in the container. The cleaning fluid circulation section may comprise a suction tube connected to the suction passage, a discharge tube connected to the discharge passage, and a circulation pump connected to the suction tube and the discharge tube, respectively. The plurality of suction holes may be arranged separately from each other in the circumferential direction of the first stirring rod, and the suction passage may comprise a recovery conduit, connected to a suction tube from the cleaning fluid circulation part and extending along the direction of the central axis of the first stirring rod, and a bifurcated recovery conduit, which branches off from the recovery conduit to connect to the plurality of suction holes. The cleaning fluid supply portion may comprise a cleaning fluid tank in which the cleaning fluid is stored, and a supply pump that supplies the cleaning fluid from the cleaning fluid tank to the interior of the container. The stirring device may further comprise a control part that controls the cleaning fluid supply part, the first and second stirring parts, and the cleaning fluid circulation part, wherein the control part may be provided so as to supply the cleaning fluid to the inside of the container, at a certain level through the cleaning fluid supply part, and then actuate the cleaning fluid circulation part. The control part may be provided to maintain a rotation speed of the first stirring rod lower than a rotation speed of the second stirring rod. Therefore, the control part may be provided to actuate the cleaning liquid circulation part while rotating the first stirring rod and the second stirring rod. The cleaning fluid circulation portion may further comprise a valve installed on the first stirring rod for opening and closing the suction holes, where the valve may be provided to open the suction holes after the circulation pump is activated. A stirring device according to another example of the present invention is set forth in appended claim 10. In this case, the first stirring rod may be located in the central area of ​​the container, and the respective second stirring rods may be arranged separated from the first stirring rod by the same interval. Therefore, the plurality of suction holes can be located at a lower height than the plurality of discharge holes in the container. The cleaning fluid circulation section may comprise a suction tube connected to the suction passage, a discharge tube connected to the discharge passage, and a circulation pump connected to the suction tube and the discharge tube, respectively. Advantageous effects As described above, the stirring device related to at least one example of the present invention has the following effects. When cleaning a container, the lower part of the container can be cleaned while the cleaning fluid is agitated inside, and the upper part of the container can be cleaned while the cleaning fluid is sprayed into the upper part of the container by the cleaning fluid circulation system. In other words, the entire container can be cleaned automatically by the cleaning fluid circulation system. Additionally, by automating the cleaning of the container, it is possible to perform a mixing process of a suspension after quickly cleaning the container, so that the production performance of the suspension can be improved. Brief description of the drawings Figure 1 is a diagram explaining a container cleaning process using conventional technology. Figure 2 schematically illustrates a diagram of the configuration of an agitation device according to an example of the present invention. Figure 3 is a diagram to explain a process in which a cleaning fluid is introduced into a container when a cleaning fluid supply part is actuated in an example of the present invention. Figure 4 is a diagram to explain a flow of a cleaning fluid when a cleaning fluid circulation part is operating in an example of the present invention. Figure 5 is a diagram to explain a flow of a cleaning liquid when a cleaning liquid circulation part works together with first and second stirring parts in an example of the present invention. Figure 6(a) is a cross-section diagram of a first stirring part and Figure 6(b) is a schematic diagram to explain a flow of a cleaning liquid flowing through a suction step in the first stirring part when a cleaning liquid circulation part is operating. Figure 7(a) is a cross-section diagram through AA in Figure 6(a) and Figure 7(b) is a cross-section diagram through BB in Figure 6(a). Figure 8(a) is a cross-section diagram of a second stirring part and Figure 8(b) is a schematic diagram to explain a flow of a cleaning liquid flowing through a discharge step in the second stirring part when a cleaning liquid circulation part is operating. Figure 9(a) is a cross-section diagram by CC in Figure 8(a) and Figure 9(b) is a cross-section diagram by DD in Figure 8(a). Preferred embodiment of the invention Hereafter, a stirring device according to an example of the present invention will be described with reference to the accompanying figures. Additionally, regardless of the reference numbers, the same or similar reference numbers are provided for the same or corresponding components; duplicate descriptions of the same will be omitted, and for the convenience of explanation, the size and shape of each component member, as shown, may be exaggerated or reduced. Figure 2 schematically illustrates a configuration diagram of an agitation device according to an example of the present invention, and Figure 3 is a diagram to explain a process in which a cleaning liquid is introduced into a container when a cleaning liquid supply part is actuated in an example of the present invention. Figure 4 is a diagram to explain a flow of a cleaning liquid when a cleaning liquid circulation part is operating in an example of the present invention, and Figure 5 is a diagram to explain a flow of a cleaning liquid when a cleaning liquid circulation part is operating together with first and second stirring parts in an example of the present invention. A stirring device (100) related to an example of the present invention comprises a container (110) and a cleaning fluid supply part (160) for supplying a cleaning fluid (W1) to the container (110). Also, the stirring device (100) comprises a first stirring part (120) that includes a first stirring rod (121) located in the inner space (112) of the container (110), and which has a suction passage (122) provided inside the first stirring rod (121) and a plurality of suction holes (123) that fluidly and movably connect the suction passage (122) and the inner space (112) of the container (110) and that draw the cleaning liquid (W1) from the inner space (112) of the container. Additionally, the stirring device (100) comprises a second stirring part (140, 140A) that includes a second stirring rod (141) located in the inner space (112) of the container (110), and which has a discharge passage (142) provided inside the second stirring rod (141) and a plurality of discharge holes (143) that fluidly and movably connect the discharge passage (142) and the inner space (112) of the container (110). Furthermore, the stirring device (100) may also comprise a single second stirring part (140) and may also comprise a plurality of second stirring parts (140, 140A). In the case of comprising a plurality of second stirring parts (140, 140A), the respective second stirring parts (140, 140A) are configured identically and have only different positions in the vessel (110). Additionally, the stirring device (100) comprises a cleaning fluid circulation part (170) connected to the suction passage (122) and the discharge passage (142), respectively, and provided to supply the cleaning fluid (W1) introduced through the suction passage (122) to the discharge passage (142). In the present example, the stirring device (100) is intended to perform a wet stirring process (also called mixing mode) of suspended raw materials (not shown) to form a suspension (not shown) and a cleaning process (also called cleaning mode) to clean the vessel (110). The cleaning process is performed to clean the vessel (110) after producing a certain quantity of suspension (not shown) by the mixing process and before producing another type of suspension (not shown). Referring to Figure 2, the stirring device (100) comprises a vessel (110), a first stirring part (120), second stirring parts (140, 140A), a cleaning fluid supply part (160), a cleaning fluid circulation part (170), and a control part (180). The control part (180) is intended to control the first stirring part (120), the second stirring parts (140, 140A), the cleaning fluid supply part (160), and the cleaning fluid circulation part (170), respectively. The first and second stirring parts (120, 140, 140A) are designed to stir the contents of the inner space (112) of the vessel (110). After mixing mode, the first and second stirring parts (120, 140, 140A) stir the suspended raw materials (not shown) in the inner space (112) of the vessel (110). After cleaning mode of the vessel (110), the first and second stirring parts (120, 140, 140A) stir the cleaning fluid (W1) in the inner space (112) of the vessel (110). In this example, for the sake of clarity, the interior space (112) of the vessel (110) is divided into an upper space (114) and a lower space (113), and named accordingly, based on the vertical direction of the vessel. In this document, the vertical direction of the vessel (110) refers to the directions of the central axes (C1, C2) of the first and second stirring parts (120, 140, 140A). In this case, the lower space (113) is a space where the cleaning fluid (W1) is filled to a certain level through the cleaning fluid supply part (160), which is a space affected by vortices when the first and second stirring rods (121, 141) rotate. In this case, the upper space (114) is a place located at the top of the lower space (113), which corresponds to a space where the cleaning fluid is not filled through the cleaning fluid supply part (160), and is a space where the influence of the vortices after the rotation of the first and second stirring rods (121, 141) does not reach. As shown in Figure 2, the first stirring part (120) comprises the first stirring rod (121) arranged in the center of the container (110) and having the suction passage (122) and the plurality of suction holes (123). The suction passage (122) is provided inside the first stirring rod (121). The suction passage (122) is a passage through which the cleaning fluid (W1) introduced from the lower space (113) of the container (110) flows upwards from said container (110) when the circulation pump (171) is operating. The suction passage (122) is designed to pass through the central axis (C1) of the first stirring rod (121). This is to prevent the eccentricity of the cleaning fluid (W1) from entering the suction passage (122) in any direction when the first stirring rod (121) is rotated. Figure 6(a) is a cross-sectional diagram of a first stirring part, Figure 6(b) is a schematic diagram to explain a flow of a cleaning liquid flowing through a suction step in the first stirring part when a cleaning liquid circulation part is operating, Figure 7(a) is a cross-sectional diagram through AA in Figure 6(a) and Figure 7(b) is a cross-sectional diagram through BB in Figure 6(a). Referring to Figures 6(a) and 7(a), the aspiration passage (122) has a recovery duct (122a) and a bifurcated recovery duct (122b), which branches off from the recovery duct (122a). The recovery conduit (122a) is a passage extending along the direction of the central axis (C1) of the first stirring rod (121). The bifurcated recovery conduit (122b) is a passage branching off from the recovery conduit (122a) to connect the plurality of suction holes (123). The plurality of suction holes (123) is provided on the lower part of the first stirring rod (121). The plurality of suction holes (123) is provided to be exposed to the outer surface of the first stirring rod (121). The plurality of suction holes (123) are arranged separately from each other along the circumferential direction of the first stirring rod (121). The plurality of suction holes (123) are passages through which the cleaning fluid (W1) is drawn into the container (110), which smoothly and movably connect the suction passage (122) and the interior space of the container (110). The plurality of suction holes (123) is located at a lower height than the plurality of discharge holes (143) in the interior space (112) of the container (110). This is to allow the cleaning fluid (W1) in the interior space (112) of the container (110) to enter more easily into the plurality of suction holes (123) when the cleaning fluid circulation part (170) is operating. A valve (128) for opening and closing the plurality of suction ports (123) is further installed on the first stirring rod (121). The valve (128) may be installed on the first stirring rod (121) to open and close the plurality of suction ports (123) simultaneously or individually. The valve (128) may be provided to open the suction port (123) when the circulation pump (171) of the cleaning fluid circulation section (170) is operating. The control unit (180) actuates the valve (128) to open and close. After mixing mode, the control unit (180) actuates the valve (128) to close all the suction ports (123). After cleaning mode, the control unit (180) actuates the valve (128) to open the suction ports (123). Additionally, the control unit (180) is designed to actuate the cleaning fluid circulation unit (170) while rotating the first stirring rod (121) and the second stirring rod (141). In this instance, the first stirring rod (121) is made to rotate at a lower speed than the rotational speed of the second stirring rod (141). That is, the control part (180) may be designed to maintain a rotational speed of the first stirring rod (121) that is lower than the rotational speed of the second stirring rod (141). The rotational speed of the first stirring rod (121) may be within a range of 1 / 3 to 2 / 3 of the maximum rotational speed of the first stirring motor (126). Additionally, as shown in Figure 2, the first stirring part (120) further comprises a first stirring motor (126) that provides rotational force to the first stirring rod (121), a first stirring paddle (124) that stirs the contents in the container (110) when the first stirring rod (121) rotates, and a first clamping part (125) that rotatably couples the first stirring rod (121) to the top of the container (110). The first clamping part (125) smoothly and movably connects the first stirring rod (121) and the suction tube (173) of the cleaning fluid circulation part (170).Figure 8(a) is a cross-sectional diagram of a second stirring part, Figure 8(b) is a schematic diagram to explain a flow of a cleaning liquid flowing through a discharge step in the second stirring part when a cleaning liquid circulation part is operating, Figure 9(a) is a cross-sectional diagram by CC in Figure 8(a) and Figure 9(b) is a cross-sectional diagram by DD in Figure 8(a). From now on, with reference to Figures 2, 8 and 9, the second part of agitation (140, 140A) will be described. The second stirring part (140, 140A) comprises a second stirring rod (141) arranged on an edge in the container (110) to be separated from the first stirring rod (121). Additionally, the second stirring part (140, 140A) further comprises a second stirring motor (146) that provides rotational force to the second stirring rod (141), a second stirring paddle (144) that stirs the contents in the container (110) when the second stirring rod rotates, and a second clamping part (145) that rotatably couples the second stirring rod to the top of the container (110). The second clamping part (145) smoothly and movably connects the second stirring rod (141) and the discharge tube (175) of the cleaning liquid circulation part (170). One or a plurality of second stirring parts (140, 140A) may be provided. The plurality of second stirring parts (140, 140A) may be arranged separated from each other by the same interval based on the first stirring part (120). When a pair of second stirring parts (140, 140A) are provided for, two discharge tubes from the cleaning liquid circulation part (170) are provided for, and on this occasion, the plurality of discharge tubes (175, 177) may comprise the first discharge tube (175) and the second discharge tube (177). That is, either of the second stirring parts (140) is connected to the circulation pump (171) by the first discharge tube (175) and the other second stirring part (140A) is connected to the circulation pump (171) by the second discharge tube (177). The plurality of second stirring parts (140, 140A) have the same structure and thus the description will be based on a second stirring part (140) in order to avoid repetition of the description. As shown in Figures 8(a) and 9(a), the second stirring rod (141) has a discharge passage (142) and a plurality of discharge holes (143). The discharge passage (142) is provided inside the second stirring rod (141). The discharge passage (142) is a passage through which the cleaning fluid (W1) supplied through the discharge tube (175) of the cleaning fluid circulation section (170) flows. The discharge passage (142) is designed to pass through the central axis (C2) of the second stirring rod (141). This is so that, when the second stirring rod (141) is rotated, the reusable cleaning fluid (W2), which flows through the discharge passage (142), is sprayed evenly in the circumferential direction of the second stirring rod (141) along a bifurcated discharge conduit (142b), based on the central axis (C2) of the second stirring rod (141) not being concentrated in any particular direction. The discharge passage (142) has a discharge conduit (142a) and a forked discharge conduit (142b), which branches off from the discharge conduit (142a). The discharge conduit (142a) is a passage that extends along the direction of the central axis (C2) of the second stirring rod (141). The forked discharge conduit (142b) is a passage that branches off from the discharge conduit (142a) to connect the plurality of discharge orifices (143). The plurality of discharge holes (143) are passages through which the reusable cleaning fluid (W1), discharged from the discharge passage (142), is discharged into the upper space (114) of the container (110). The plurality of discharge holes (143) is intended to be exposed to the outer surface of the second stirring rod (141). The plurality of discharge holes (143) are arranged separately from each other along the circumferential direction of the second stirring rod (141). The plurality of discharge holes (143) is provided on the upper part of the second stirring rod (141). Additionally, the discharge holes (143) are provided to be located in the upper space (114) of the container (110). The plurality of discharge holes (143) is located at a greater height than the plurality of suction holes (123) provided on the first stirring rod (121) in the inner space (112) of the container (110). The respective discharge holes (143) smoothly and movably connect the upper space (114) of the container (110) and the discharge passage (142). As described above, the upper space (114) is a space in which vortices do not affect the rotation of the first and second stirring rods (121, 141). The second stirring part (140) can be operated such that the second stirring rod (141) rotates when the cleaning liquid circulation part (170) is operating. The second stirring rod (141) rotates at a higher speed than the first stirring rod (121). After the vessel cleaning mode (110), the rotational speed of the second stirring rod (141) can be within a range of 1 / 3 to 2 / 3 of the maximum rotational speed of the second stirring motor (146). After the vessel cleaning mode (110), the second stirring rod (141) can be rotated at a speed within a range of 20 rpm to 40 rpm. When the second stirring rod (141) is rotating, the pressure of the reuse cleaning fluid (W2), discharged through the plurality of discharge holes (143), can be proportional to the rotational speed of the second stirring rod (141). Referring to Figure 5, when the second stirring rod (141) is rotated, the reusable cleaning fluid (W2) cleans the upper space (114) of the container (110) while being sprayed in the circumferential direction of the second stirring rod (141) through the respective discharge holes (143). As described above, by changing the structure of the first stirring rod (121) and the second stirring rod (141), and the cleaning liquid circulation part (170) connected to the first stirring rod (121) and the second stirring rod (141) to circulate the cleaning liquid, it is also possible to clean the upper space (114), which is not affected by the vortices when the first and second stirring rods (121, 141) rotate. Henceforth, with reference to Figures 4 and 5, the cleaning fluid circulation part (170) that circulates the cleaning fluid (W1) in the container (110) after the cleaning mode of said container (110) will be described. The cleaning fluid circulation section (170) is connected to the suction passage (122) of the first stirring rod (121) and to the discharge passage (142) of the second stirring rod (141), respectively, and is intended to supply the cleaning fluid introduced through the suction passage (122) to the discharge passage (142). Additionally, the cleaning fluid circulation section (170) may comprise a suction tube (173) connected to the suction passage (122), discharge tubes (175, 177) connected to the discharge passages (142), and a circulation pump (171) connected to the suction tube (173) and the discharge tubes (175, 177), respectively. The suction tube (173) is attached to the first clamping part (125) to connect smoothly and movably to the suction passage (122). The first and second discharge tubes (175, 177) are coupled to the second clamping parts (145) of the second stirring parts (140, 140A) to connect smoothly and movably to the respective discharge steps (142). The circulation pump (171) is a pump that compresses the cleaning fluid (W1), introduced through the suction tube (173), to discharge it into the first and second discharge tubes (175, 177), respectively. Referring to Figures 4 and 5, the circulation pump (171) is activated to draw the cleaning fluid (W1) upwards into the container (110) after the cleaning mode of the control unit (180). Referring to Figure 5, after the container cleaning mode (110), the cleaning liquid circulation part (170) is activated, and the control part (180) is expected to rotate the first stirring part (120) and the second stirring parts (140, 140A), respectively. Referring to Figures 6(b) and 7(b), after the circulation pump (171) is activated, the cleaning fluid (W1) in the inner space (112) of the container (110) enters the bifurcated recovery conduit (122b) through the respective suction ports (123). The cleaning fluid (W1) is then displaced from the bifurcated recovery conduit (122b) to the top of the first stirring rod (121) along the recovery conduit (122a). Subsequently, the cleaning fluid (W1) enters the circulation pump (171) through the suction tube (173). The circulation pump (171) compresses the cleaning fluid (W1) to a predetermined pressure for discharge from the circulation pump (171). The cleaning pressure is within a range of 0.5 bar to 2 bar. When the second stirring rod (141) rotates, the cleaning pressure can range from 0% to 50% of the maximum pressure of the circulation pump (171), taking into account the rotational force of the second stirring rod (141). Henceforth, the cleaning fluid (W1) discharged from the circulation pump (171) to the first and second discharge tubes (175, 177) is referred to as "reuse cleaning fluid (W2)." Referring to Figures 8(b) and 9(b), after operating the circulation pump (171), the reuse cleaning fluid (W2) is displaced in the lower direction of the second stirring rod (141) along the discharge conduit (142a) of the discharge passage (142), branches into several branches through the bifurcated discharge conduits (142b) and is then discharged through the respective discharge holes (143). The reusable cleaning fluid (W2) is discharged from the respective discharge holes (143) into the upper space (114) of the container (110) (see Figure 4). The reusable cleaning fluid (W2) can clean the upper space (114) of the container (110) while being sprayed laterally by the second stirring rod (141) due to the cleaning pressure. Alternatively, the reusable cleaning fluid (W2) is sprayed into the upper space (114) of the container (110) in the circumferential direction of the second stirring rod (141) by the centrifugal force of the second stirring rod (141) (see Figure 5), thereby being able to clean the upper space (114) of the container (110). Henceforth, with reference to Figure 3, the cleaning fluid supply part (160) that supplies the cleaning fluid (W1) to the interior space (112) of the container (110) before the operation of the circulation pump (171) will be described. Referring to Figure 3, after the cleaning mode of the container (110), the cleaning fluid supply part (160) is intended to supply the cleaning fluid (W1) to the container (110). The cleaning fluid supply part (160) comprises a cleaning fluid reservoir (161), a supply pump (163), and a cleaning fluid supply tube (165). The cleaning fluid (W1) is stored in the cleaning fluid tank (161). The supply pump (163) is connected to the cleaning fluid tank (161). The supply pump (163) supplies the cleaning fluid (W1) from the cleaning fluid reservoir (161) to the inner space (112) of the container (110). The cleaning fluid supply tube (165) connects the container (110) and the supply pump (163). After the supply pump (163) is activated, the cleaning fluid (W1) is supplied from the cleaning fluid reservoir (161) to the container (110). The supply pump (163) delivers the cleaning fluid (W1) to the inner space (112) of the container (110) until the cleaning fluid (W1) reaches a certain level in the inner space (112) of the container (110). In this case, a certain level is the boundary between the upper space (114) and the lower space (113). This certain level may vary depending on the volume of the container (110). Additionally, the amount of cleaning fluid (W1) entering the container (110) may vary depending on the volume of the container (110).As shown in Figure 3, in the container cleaning mode (110), the control part (180) supplies the cleaning fluid (W1) to the inside of the container (110), at a certain level through the cleaning fluid supply part (160), and then actuates the cleaning fluid circulation part (170). Additionally, as shown in Figure 5, after the container cleaning mode (110), a valve (128) is opened and the control part (180) drives the circulation pump (171), the first stirring motor (126) and the second stirring motor (146). That is, when the cleaning fluid (W1) reaches a certain level in the interior space (112) of the vessel (110), the supply pump (163) stops. Then, the interior space (112) of the vessel (110) is cleaned while the circulation pump (171), the first stirring motor (126), and the second stirring motor (146) are operating. When the first and second stirring motors (126, 146) are activated, the first and second stirring rods (121, 141) stir the cleaning liquid (W1) in the container (110) while rotating to form vortices, thereby cleaning the lower space (113) of the container (110). At the same time, the circulation pump (171) draws the cleaning fluid (W1) upwards in the container (110) through the suction passage (122) of the first stirring rod (121) to discharge it to the discharge passage (142) of the second stirring rod (141). The reuse cleaning fluid (W2), discharged through the discharge passage (142), is sprayed into the upper space (114) of the container (110) to clean said upper space (114) of said container (110). Industrial applicability According to the stirring device related to at least one example of the present invention, the lower space of the container can be cleaned while stirring the cleaning fluid in the container, and the upper space of the container can be cleaned while the cleaning fluid in the container is sprayed into the upper space of the container by means of the cleaning fluid circulation portion.

Claims

1. A stirring device (100) comprising: a container (110); a cleaning fluid supply part (160) for supplying a cleaning solution to the container (110); a first stirring part (120) including a first stirring rod (121) located inside the container (110), and having a suction passage (122) provided inside the first stirring rod (121) and a plurality of suction holes (123) fluidly and movably connecting the suction passage (122) and the interior space (112) of the container (110) and drawing the cleaning fluid (W1) into the container (110); a second stirring part (140) including a second stirring rod (141) located inside the container (110),and having a discharge passage (142) provided within the second stirring rod (141) and a plurality of discharge holes (143) fluidly and movably connecting the discharge passage (142) and the interior space (112) of the container (110); and a cleaning fluid circulation portion (170) connected to the suction passage (122) and the discharge passage (142), respectively, and provided for supplying the cleaning fluid introduced through the suction passage (122) to the discharge passage (142); the plurality of discharge holes (143) being spaced apart from each other along the circumferential direction of the second stirring rod (140), and characterized in that the discharge passage (142) comprises a discharge conduit (142a),connected to a discharge tube (175) of the cleaning fluid circulation portion (170) and extending along the direction of the central axis of the second stirring rod (140), and a bifurcated discharge conduit (142b), which branches off from the discharge conduit (142a) to connect to the plurality of discharge orifices (143).

2. The stirring device (100) according to claim 1, wherein the plurality of suction orifices (123) is located at a lower height than the plurality of discharge orifices (143) in the container.

3. The stirring device (100) according to claim 1, wherein the cleaning fluid circulation portion (170) comprises: a suction tube (173) connected to the suction passage (122); a discharge tube (175) connected to the discharge passage (142); and a circulation pump (171) connected to the suction pipe (173) and the discharge pipe (175),respectively.

4. The stirring device (100) according to claim 1, wherein the plurality of suction holes (123) are spaced apart from each other in the circumferential direction of the first stirring rod (120), and the suction passage (122) comprises a recovery conduit (122a), connected to a suction tube (173) from the cleaning fluid circulation portion (170) and extending along the central axis direction of the first stirring rod (120), and a bifurcated recovery conduit (122b), branching off from the recovery conduit (122a) to connect to the plurality of suction holes (123).

5. The stirring device (100) according to claim 1,wherein the cleaning fluid supply portion (160) comprises: a cleaning fluid reservoir (161) in which the cleaning fluid (W1) is stored; and a supply pump (163) that supplies the cleaning fluid (W1) from the cleaning fluid reservoir (161) to the interior of the container.

6. The stirring device (100) according to claim 1, further comprising a control portion (180) that controls the cleaning fluid supply portion (160), the first and second stirring portions (120, 140), and the cleaning fluid circulation portion (170), wherein the control portion (180) is arranged so as to supply the cleaning fluid (W1) to the interior of the container (110) at a certain level through the cleaning fluid supply portion (160), and then actuates the cleaning fluid circulation portion (170).

7. The stirring device (100) according to claim 6,wherein the control portion (180) is provided to maintain a rotational speed of the first stirring rod (121) lower than the rotational speed of the second stirring rod (141).

8. The stirring device (100) according to claim 6, wherein the control portion (180) is provided to actuate the cleaning fluid circulation portion (170) while rotating the first stirring rod (121) and the second stirring rod (141).

9. The stirring device (100) according to claim 3, wherein the cleaning fluid circulation portion (170) further comprises a valve (128) installed on the first stirring rod (121) for opening and closing the suction ports (123).where the valve (128) is provided to open the suction ports (123) after actuating the circulation pump (171).

10. An agitation device (100) comprising: a container (110); a cleaning fluid supply part (170) for supplying a cleaning solution to the container (110); a first agitation part (120) including a first stirring rod (121) located inside the container (110) and having a suction passage (122) provided inside the first stirring rod (121) and a plurality of suction ports (123) fluidly and movably connecting the suction passage (122) and the interior space (112) of the container (110) and drawing the cleaning fluid (W1) into the container (110); a plurality of second stirring parts (140, 140A), each including a second stirring rod (141) located inside the container,and having a discharge passage (142) provided within the second stirring rod (141) and a plurality of discharge holes (143) fluidly and movably connecting the discharge passage (142) and the interior space of the container (110); and a cleaning fluid circulation portion (170) connected to the suction passage (122) and the discharge passage (142), respectively, and provided for supplying the cleaning fluid (W1) introduced through the suction passage (122) to the discharge passage (142); the plurality of discharge holes (143) being spaced apart from each other along the circumferential direction of the second stirring rod (140), and characterized in that the discharge passage (142) comprises a discharge conduit (142a),connected to a discharge tube (175) of the cleaning liquid circulation portion (170) and extending along the direction of the central axis of the second stirring rod (140), and a bifurcated discharge conduit (142b), which branches off from the discharge conduit (142a) to connect to the plurality of discharge orifices (143).

11. The stirring device (100) according to claim 10, wherein the first stirring rod (120) is located in the central area of ​​the container (110), and the respective second stirring rods (141) are arranged separated from the first stirring rod (121) by the same interval.

12. The stirring device (100) according to claim 10, wherein the plurality of suction holes (123) is located at a lower height than the plurality of discharge holes (143) in the container (100).

13. The stirring device (100) according to claim 10,wherein the cleaning fluid circulation portion comprises: a suction tube (173) connected to the suction passage (122); a discharge tube (175) connected to the discharge passage (142); and a circulation pump (171) connected to the suction tube (173) and the discharge tube (175), respectively.