Hybrid type sodium hypochlorite manufacturing device

Abstract

The present invention relates to a composite sodium hypochlorite manufacturing apparatus capable of producing sodium hypochlorite for various uses by selectively using a diaphragm type and a diaphragm-free type. The present invention provides a composite sodium hypochlorite manufacturing apparatus that can manufacture sodium hypochlorite of various pH values ​​usable in various fields, such as strong acid, weak acid, and mild acid, in a single apparatus by implementing a diaphragm-type / diaphragm-free integrated structure apparatus for manufacturing sodium hypochlorite through an appropriate arrangement structure of a "+" electrode, a "-" electrode, and a diaphragm, and an appropriate partitioning of the internal space in which each electrode and diaphragm are accommodated, thereby enabling structural simplification and compact manufacturing at a low cost.

Description

Technology Field

[0001] The present invention relates to a composite sodium hypochlorite manufacturing apparatus, and more specifically, to a composite sodium hypochlorite manufacturing apparatus capable of manufacturing sodium hypochlorite for various uses by selectively using a diaphragm type and a diaphragm-free type. Background Technology

[0003] Generally, sodium hypochlorite (NaOCl) is a colorless, transparent liquid chlorine-based disinfectant used in sterilization devices at water purification plants and sewage treatment plants, cooling water boilers in general chemical plants, desalination process treated water, cooling water treatment in power plants, drinking water treatment, plant and vegetable processing, meat processing, laundry in swimming pools and paper manufacturing, and as a household bleach.

[0004] The method of manufacturing sodium hypochlorite based on the electrolytic principle of salt water is mainly used to produce sodium hypochlorite (NaOCl).

[0005] As an example, a large amount of salt is precipitated in water of a certain amount and pressure, and this state is maintained for 8 to 24 hours, at which point 28 to 30 percent of the salt is melted. Then, the saturated salt water of a certain amount and pressure, in which the salt is melted, is mixed with a pump or the like to produce a diluted salt solution with a salinity of 2.8 to 3.0 percent. Then, the salt in the diluted salt solution is electrolyzed by a direct current voltage applied to both sides of the electrodes through a process in which this solution is passed through an electrolysis device having a series of electrodes (anode and cathode).

[0006] That is, the 2.8–3.0% diluted brine introduced into the interior of the electrolysis device dissociates into sodium ions (Na+) and chloride ions (Cl-). The chloride ions are oxidized at the anode to become chlorine, and the sodium ions are reduced at the cathode to produce sodium. The produced sodium reacts with water to become sodium hydroxide (NaOH) and hydrogen, and then the chlorine produced at the anode reacts with the sodium hydroxide to produce sodium hypochlorite (NaOCl).

[0007] The sodium hypochlorite produced in this way is used as a safe form of brine for chlorine disinfection or as an oxidizing agent at sites requiring disinfection or oxidation; the production volume and concentration of sodium hypochlorite follow Faraday's law, and the production volume and concentration are determined by the diluted brine, which is a mixture of supplied water and salt water.

[0008] Typically, sodium hypochlorite is manufactured using either a membrane-free or membrane-based method, based on the electrolytic principle of saltwater.

[0009] As an example, a method for producing sodium hypochlorite without a diaphragm is a method of producing mildly acidic hypochlorous acid water by electrolyzing raw water to which 2 to 6% hydrochloric acid has been added in a diaphragm-free electrolytic cell, wherein chloride ions are oxidized at the anode to become chlorine, react with the raw water to produce hypochlorous acid, and are mixed and diluted with a large amount of raw water to produce mildly acidic hypochlorous acid water with a pH of 5.0 to 6.5.

[0010] This method has disadvantages such as a complex device structure and the need for fine adjustment of process conditions, making it difficult to operate; furthermore, because hydrochloric acid must be handled as an electrolyte, it poses a significant risk to users operating it arbitrarily at home.

[0011] As another example, a diaphragm-type method for manufacturing sodium hypochlorite involves placing a diaphragm for separating and collecting electrolytic products, collecting alkaline water and strongly acidic water at the cathode and anode, respectively, to produce hypochlorous acid, or mixing and neutralizing the two collected compositions or supplying separate hydrochloric acid to neutralize them to produce sodium hypochlorite.

[0012] This method has limitations as it is restricted to household applications such as health drinks, skin care, bean sprout or chili pepper cultivation, or kimchi fermentation. Furthermore, it has the disadvantages of being complex, difficult to operate, and expensive, as it requires precise flow rate control to maintain acidic and alkaline water at an appropriate pH, and mixing necessitates the installation of a storage tank to receive and store the generated electrolyzed water, as well as injection metering pumps and stirrers.

[0013] Although such sodium hypochlorite has the advantage of being usable for a wide variety of applications depending on the pH range, the pH of sodium hypochlorite that can be produced is limited depending on whether the diaphragm-type or diaphragm-free method is used and the type of electrolyte. Therefore, the present invention aims to devise a method for producing sodium hypochlorite of various pH values ​​applicable to multiple uses in a single device. Prior art literature

[0015] Registered Patent Publication No. 10-2480596 Registered Patent Publication No. 10-1313698 Registered Patent Publication No. 10-1371616 Registered Patent Publication No. 10-1941375 The problem to be solved

[0016] Accordingly, the present invention has been devised in consideration of such points, and aims to provide a composite sodium hypochlorite manufacturing apparatus that can produce sodium hypochlorite of various pH values ​​usable in various fields, such as strong acid, weak acid, and mild acid, in a single apparatus by implementing a diaphragm-type / diaphragm-non-diaphragm integrated structure that selectively uses a diaphragm-type and / or diaphragm-non-diaphragm type to manufacture sodium hypochlorite through an appropriate arrangement structure of a "+" electrode, a "-" electrode, and a diaphragm during the manufacture of sodium hypochlorite, and an appropriate partitioning of the internal space in which each electrode and diaphragm are accommodated, thereby enabling the manufacture of sodium hypochlorite of various pH values ​​usable in various fields, such as strong acid, weak acid, and mild acid, as well as a compact device with simplified structure and low cost. means of solving the problem

[0018] To achieve the above objective, the composite sodium hypochlorite manufacturing apparatus provided in the present invention has the following features.

[0019] The above-described composite sodium hypochlorite manufacturing apparatus comprises a central case and two side cases that are combined in a structure forming an integral unit by overlapping side by side, each having a fluid inlet on one side and a fluid outlet on the other, while also forming an internal space; a plate-shaped center "+" electrode and a center "-" electrode installed inside the center case, each having an electrode terminal exposed to the outside; a plate-shaped side "-" electrode having an electrode terminal exposed to the outside and a plurality of holes penetrating the thickness, and inserted and installed side by side between the boundary surfaces of the center case and the side cases; and respective diaphragms inserted and installed side by side on the inner surface of the side "-" electrode between the boundary surfaces of the center case and the side cases, which partition the space within the side case to which the side "-" electrode belongs from the space within the center case to which the center "+" electrode and the center "-" electrode belong.

[0020] Accordingly, the above-described composite sodium hypochlorite manufacturing apparatus is characterized by being able to manufacture sodium hypochlorite in a non-diaphragm type by applying voltage to the center "+" electrode and the center "-" electrode, or in a diaphragm type by applying voltage to the center "+" electrode and the side "-" electrode, or in a non-diaphragm and diaphragm type by applying voltage to all of the center "+" electrode, the center "-" electrode, and the side "-" electrode.

[0021] Here, the center case and the side case can form an integral structure by means of multiple bolts and nuts that are fastened by successively penetrating three cases stacked side by side and arranged at regular intervals along the edges of the cases.

[0022] At this time, the center case and side case may be made of a material such as transparent synthetic resin that allows the internal state to be checked.

[0023] The center "+" electrode and center "-" electrode of this composite sodium hypochlorite manufacturing device are composed of multiple units vertically arranged parallel to each other at regular intervals, and the center "-" electrodes are positioned between the center "+" electrodes. Additionally, the multiple center "+" electrodes and center "-" electrodes are connected by respective adapters, and each adapter can be connected to a bolt-shaped electrode terminal.

[0024] In addition, valves for controlling the entry and exit of fluid may be installed at the fluid inlet and fluid outlet of the center case and side case.

[0025] In a preferred embodiment, each fluid inlet of the center case and the side case may be installed parallel to the lower front side of the case, and each fluid outlet may be installed parallel to the upper rear side of the case. Effects of the invention

[0027] The composite sodium hypochlorite manufacturing apparatus provided in the present invention has the following effects.

[0028] First, by applying a device with an integrated diaphragm / diaphragm structure that selectively uses a diaphragm type or a diaphragm type to produce sodium hypochlorite through an efficient arrangement structure of a "+" electrode, a "-" electrode, and a diaphragm, and an efficient partitioning of the internal space in which each electrode and diaphragm are accommodated, it is possible to produce sodium hypochlorite of various pH values, such as strong acid, weak acid, and mild acid, which can be used in various fields including industrial and domestic use, all in a single device.

[0029] Second, by applying a device with an integrated structure in which one compartment containing the "+" electrode and the "-" electrode is placed in the middle and two compartments containing the diaphragm and the "-" electrode are placed on both sides, the overall structure of the device can be simplified, the cost of manufacturing the device can be reduced, and the overall size of the device can be reduced, thereby enabling economical and efficient use in various fields according to the application. Brief explanation of the drawing

[0031] FIGS. 1 to 3 are perspective views showing a composite sodium hypochlorite manufacturing apparatus according to an embodiment of the present invention. FIG. 4 is a cross-sectional view showing a composite sodium hypochlorite manufacturing apparatus according to one embodiment of the present invention. FIGS. 5 to 7 are schematic diagrams showing the usage state of a composite sodium hypochlorite manufacturing apparatus according to one embodiment of the present invention. Specific details for implementing the invention

[0032] The present invention will be described in detail below with reference to the attached drawings.

[0033] FIGS. 1 to 3 are perspective views showing a composite sodium hypochlorite manufacturing apparatus according to one embodiment of the present invention, and FIG. 4 is a cross-sectional view showing a composite sodium hypochlorite manufacturing apparatus according to one embodiment of the present invention.

[0034] As illustrated in FIGS. 1 to 4, the composite sodium hypochlorite manufacturing apparatus is a device that manufactures sodium hypochlorite of various pH using a non-diaphragm method and / or a diaphragm method by using a "+" electrode and a "-" electrode that are not related to a diaphragm, and a "+" electrode and a "-" electrode arranged with a diaphragm in between.

[0035] To this end, the above-described composite sodium hypochlorite manufacturing apparatus includes one center case (13) and two side cases (14a, 14b) as means for providing a space for a chemical reaction when producing sodium hypochlorite.

[0036] The center case (13) is formed as a square frame-shaped case with both ends open, and at the same time, the side cases (14a, 14b) are formed as square container-shaped cases with one end open.

[0037] These center case (13) and side cases (14a, 14b) are combined in a structure that forms an integral unit by overlapping side by side while standing upright. The side cases (14a, 14b) are placed in close contact with the center case (13) on both sides, and in this state, bolts (21) and nuts (22) are fastened to the center case (13) and the side cases (14a, 14b), thereby forming a single square block shape and being combined integrally.

[0038] That is, when the center case (13) in the middle and the side cases (14a, 14b) on both sides are stacked side by side, a bolt (21) passes horizontally through the three cases in sequence from one side, and then a nut (22) is fastened from the opposite side, so that the center case (13) and the side cases (14a, 14b) can be integrally joined by the fastening structure of the bolt (21) and nut (22).

[0039] A space (10) is formed inside the center case (13) and side cases (14a, 14b) that are combined in this way, and a reaction for the production of sodium hypochlorite can be carried out within the space (10).

[0040] In this way, by adopting a structure in which the center case (13) and side cases (14a, 14b) accommodating the electrode and diaphragm are joined by a fastening structure using bolts (21) and nuts (22), it is very advantageous in terms of economy, such as making it easy to inspect or replace the electrode or diaphragm and reuse the case.

[0041] Here, the bolt (21) and nut (22) may consist of multiple bolts that are fastened at regular intervals along the edges of the center case (13) and the side cases (14a, 14b), and a pad (25) for maintaining airtightness may be inserted into the joint portion between the center case (13) and the side cases (14a, 14b) to allow for joint fastening.

[0042] And, a fluid inlet (11) is formed on one side of each of the center case (13) and side cases (14a, 14b), and a fluid outlet (12) is formed on the other side.

[0043] For example, the three fluid inlets (11) are installed side by side at the front bottom of the center case (13) and the side cases (14a, 14b), and the three fluid outlets (12) are installed side by side at the rear top of the center case (13) and the side cases (14a, 14b).

[0044] At this time, among the three fluid inlets (11) above, the fluid inlet (11) connected to the center case (13) is an inlet for saltwater, and each fluid inlet (11) connected to the side cases (14a, 14b) is an inlet for water.

[0045] And, among the three fluid outlets (12) above, the fluid outlet (12) connected to the center case (13) is an outlet from which sodium hypochlorite, unelectrolyzed salt water, etc. are discharged, and each fluid outlet (12) connected to the side cases (14a, 14b) is an outlet from which caustic soda water is discharged.

[0046] In addition, a valve (24) for controlling the flow of fluid is installed at the fluid inlet (11) and fluid outlet (12) of the center case (13) and side cases (14a, 14b), respectively, and accordingly, the amount of salt water or ordinary water supplied and the amount of sodium hypochlorite discharged can be appropriately controlled through the opening and closing operation of the valve (24).

[0047] Here, the valve (24) may be a manual valve capable of manual operation, a solenoid valve capable of automatic operation, etc.

[0048] In a preferred embodiment, the center case (13) and the side cases (14a, 14b) may be made of a transparent synthetic resin material, for example, a transparent acrylic material, and accordingly, the state of the reaction occurring in the internal space (10) of the center case (13) and the side cases (14a, 14b), the state of the electrode or diaphragm, the state of the internal liquid level, etc., can be directly checked visually.

[0049] In addition, the above-mentioned composite sodium hypochlorite manufacturing apparatus includes a center "+" electrode (16) and a center "-" electrode (17) as means for performing an electrolysis reaction to produce sodium hypochlorite in a diaphragm-free manner.

[0050] The above center "+" electrode (16) and center "-" electrode (17) are electrodes formed in the shape of square plates and are installed vertically side by side inside the center case (13). On the upper portions of the center "+" electrode (16) and center "-" electrode (17) installed in this manner, electrode terminals (15) are formed that are exposed to the outside of the center case (13), that is, exposed upward through the upper portion of the center case (13), and are simultaneously connected to the power source (not shown).

[0051] These center "+" electrodes (16) and center "-" electrodes (17) are made up of multiple units that are vertically arranged side by side at regular intervals.

[0052] For example, the center "+" electrode (16) is made up of 5 plates, and the center "-" electrode (17) is made up of 4 plates arranged in parallel between the center "+" electrodes (16).

[0053] And, a plurality of center "+" electrodes (16) and center "-" electrodes (17) are connected by each adapter (23) through their upper portions, and the adapter (23) of the center "+" electrode (16) and the adapter (23) of the center "-" electrode (17) are connected to each electrode terminal (15) formed in the shape of a bolt.

[0054] Accordingly, when an external power source is connected to each electrode terminal (15), voltage can be applied to the center "+" electrode (16) and the center "-" electrode (17) through each adapter (23).

[0055] In addition, the above-mentioned composite sodium hypochlorite manufacturing apparatus includes two side "-" electrodes (19a, 19b) as a means of performing an electrolysis reaction to produce sodium hypochlorite in a diaphragm type.

[0056] The above-mentioned side "-" electrodes (19a, 19b) are electrodes formed in the shape of a square plate, with an electrode terminal (15) in the shape of a square plate formed integrally and extending to one side of the upper part. They are installed vertically and parallel between the boundary surfaces of the center case (13) and the side cases (14a, 14b), and the electrode terminal (15) of the side "-" electrodes (19a, 19b) installed in this way is exposed upward through the upper side of the boundary surface between the center case (13) and the side cases (14a, 14b) so as to be connected to the power source (not shown).

[0057] Here, the side "-" electrodes (19a, 19b) are fastened together with the bolt (21) and nut (22) connecting the center case (13) and the side case (14a, 14b), thereby forming an integrated structure together with the center case (13) and the side case (14a, 14b).

[0058] In addition, a plurality of holes (18) penetrating the plate thickness are formed in the side "-" electrodes (19a, 19b), and accordingly, a fluid (e.g., water, salt water, sodium hypochlorite water, etc.) within the space (10) formed inside the center case (13) and the side cases (14a, 14b) can freely move through the holes (18) with respect to the side "-" electrodes (19a, 19b) to the space area within the center case (13) and the space area within the side cases (14a, 14b).

[0059] Accordingly, when an external power source is connected to the electrode terminal (15) of the center "+" electrode (16) and the electrode terminal (15) of the side "-" electrodes (19a, 19b), voltage can be applied to the center "+" electrode (16) and the side "-" electrodes (19a, 19b).

[0060] In addition, the above-mentioned composite sodium hypochlorite manufacturing apparatus includes a diaphragm (20) as a means for permeability to ions.

[0061] The above diaphragm (20) is a rectangular diaphragm having a size corresponding to the center case (13), side cases (14a, 14b), and side "-" electrodes (19a, 19b), and is inserted and installed parallel to the inner surface of the side "-" electrodes (19a, 19b) between each boundary surface between the center case (13) and the side cases (14a, 14b).

[0062] Accordingly, the spatial area within the side case (14a, 14b) to which the side part "-" electrodes (19a, 19b) belong and the spatial area within the center case (13) to which the center part "+" electrode (16) and the center part "-" electrode (17) belong can be partitioned by the above diaphragm (20), and consequently, the center part "+" electrode (16) to which the center case (13) belongs and the side part "-" electrodes (19a, 19b) to which the side case (14a, 14b) belong can be isolated from each other with the respective diaphragm (20) in between.

[0063] FIGS. 5 to 7 are schematic diagrams showing the usage state of a composite sodium hypochlorite manufacturing apparatus according to one embodiment of the present invention.

[0064] As shown in FIG. 5, when voltage is applied to the center "+" electrode (16) and the center "-" electrode (17), a membrane-free electrolysis reaction occurs between the center "+" electrode (16) and the center "-" electrode (17).

[0065] Accordingly, hypochlorite ions are generated in the space (10) containing the center part "+" electrode (16) and the center part "-" electrode (17) facing each other, and because the hypochlorite ions generated in this way are chemically unstable, they combine with sodium ions to produce alkaline sodium hypochlorite.

[0066] As shown in FIG. 6, when voltage is applied to the center "+" electrode (16) and the side "-" electrodes (19a, 19b) positioned with the diaphragm (20) in between, a diaphragm-type electrolysis reaction occurs between the center "+" electrode (16) and the side "-" electrodes (19a, 19b).

[0067] Accordingly, strong alkaline electrolytic water is generated in the space (10) to which the side "-" electrodes (19a, 19b) are located, and acidic hypochlorous acid water is generated in the space (10) to which the center "+" electrode (16) is located, and ultimately, strong acidic sodium hypochlorite with a pH of 3 or lower is generated.

[0068] For example, by electrolyzing a sodium chloride aqueous solution of 0.2% or less in a diaphragm electrolytic cell composed of an anode and a cathode separated by a diaphragm, strong acidic hypochlorous acid water can be obtained from the anode side.

[0069] As illustrated in FIG. 7, when voltage is applied to the center "+" electrode (16), the center "-" electrode (17), and the side "-" electrodes (19a, 19b), a membrane-type electrolysis reaction and a membrane-free electrolysis reaction occur simultaneously, and as a result, weakly acidic hypochlorous acid water or mildly acidic hypochlorous acid water is produced.

[0070] In other words, when voltage is applied to all electrodes, the strongly basic solution that has passed through the diaphragm is discharged separately, and weakly acidic or mildly acidic hypochlorous acid water with a pH of approximately 3 to 5 is generated due to the reduction of Na in the diaphragm-free space.

[0071] By using a single integrated manufacturing device equipped with both diaphragm-type and diaphragm-free types, strong acidic, weak acidic, and mildly acidic hypochlorous acid water and sodium hypochlorite can be easily produced, and strong alkaline electrolyzed water can also be produced simultaneously, allowing for easy selection and use of the pH of the hypochlorous acid water to suit various industrial or domestic uses.

[0072] In addition, disinfectant water of the required concentration can be produced on the spot without the need for separate dilution, allowing for convenient and safe use without the risk of maintenance or malfunction.

[0073] In addition, while there is a risk that the sterilization ability of medicinal materials may decrease due to changes in concentration over time following storage or dilution, the manufacturing device provided in this invention is used simultaneously with operation, so the sterilization power can be maintained.

[0074] Furthermore, since the manufacturing device of the present invention uses inexpensive refined edible salt as a raw material, it not only saves on the cost of producing sterilized water and ensures excellent hygiene management, but also places no burden on the environment because it uses only natural ingredients such as salt and water, making it safe for the human body and naturally biodegradable.

[0075] In this way, the present invention provides a composite sodium hypochlorite manufacturing apparatus with a diaphragm-type / diaphragm-free integrated structure that manufactures sodium hypochlorite in a diaphragm-type and / or diaphragm-free manner through the appropriate arrangement of a "+" electrode, a "-" electrode, and a diaphragm, and the appropriate partitioning of the internal space in which each electrode and diaphragm are accommodated. By doing so, sodium hypochlorite of various pH values ​​that can be used in various fields, such as strong acid, weak acid, and mild acid, can be manufactured in a single apparatus, and the structure of the apparatus can be simplified, as well as the apparatus can be manufactured compactly at a low cost. Explanation of the symbols

[0077] 10 : Space part 11: Fluid inlet 12: Fluid outlet 13 : Center Case 14a,14b : Side cases 15 : Electrode terminal 16: Center "+" electrode 17 : Center section "-" electrode 18 : Hall 19a, 19b: Side "-" electrode 20: Septum 21 : Bolt 22 : Nut 23 : Adapter 24 : Valve 25 : Pad

Claims

Claim 1 A center case (13) and two side cases (14a, 14b) are combined in a structure that forms an integral unit by overlapping side by side, with a space (10) formed inside and a fluid inlet (11) on each side and a fluid outlet (12) on each other side; a plate-shaped center "+" electrode (16) and a center "-" electrode (17) installed inside the center case (13), each having an electrode terminal (15) exposed to the outside; a plate-shaped side "-" electrode (19a, 19b) formed with an electrode terminal (15) exposed to the outside and a plurality of holes (18) penetrating the thickness, and inserted and installed side by side between each boundary surface of the center case (13) and the side cases (14a, 14b); and a side part "-" electrode (19a, 19b) inserted and installed side by side on the inner surface of the side "-" electrode (19a, 19b) between each boundary surface of the center case (13) and the side cases (14a, 14b). Each partition (20) partitioning the space (10) within the side case (14a, 14b) to which the "-" electrode (19a, 19b) belongs, and the space (10) within the center case (13) to which the center "+" electrode (16) and the center "-" electrode (17) belong;Sodium hypochlorite is manufactured in a non-diaphragm manner by applying voltage to the center "+" electrode (16) and the center "-" electrode (17), or sodium hypochlorite is manufactured in a diaphragm manner by applying voltage to the center "+" electrode (16) and the side "-" electrodes (19a, 19b), or sodium hypochlorite is manufactured in a non-diaphragm and diaphragm manner by applying voltage to all of the center "+" electrode (16), the center "-" electrode (17), and the side "-" electrodes (19a, 19b), and sodium hypochlorite is manufactured in both non-diaphragm and diaphragm manners. The center "+" electrode (16) and the center "-" electrode (17) are composed of a plurality of units that are vertically arranged parallel to each other at a certain interval, and the center "-" electrode (17) is arranged between the center "+" electrodes (16), and the plurality of center "+" electrodes (16) and the plurality of center "-" A composite sodium hypochlorite manufacturing apparatus characterized in that the electrode (17) is connected by each adapter (23) through its upper portion, and each adapter (23) is connected to each electrode terminal (15) formed in the shape of a bolt. Claim 2 A composite sodium hypochlorite manufacturing apparatus according to claim 1, characterized in that the center case (13) and side cases (14a, 14b) form an integral structure by means of a plurality of bolts (21) and nuts (22) that are fastened while being arranged at regular intervals along the edges of the cases and horizontally penetrating three cases stacked side by side. Claim 3 A composite sodium hypochlorite manufacturing apparatus according to claim 1 or claim 2, characterized in that the center case (13) and side cases (14a, 14b) are made of a transparent synthetic resin material so that the internal condition can be visually checked. Claim 4 delete Claim 5 A composite sodium hypochlorite manufacturing apparatus according to claim 1, characterized in that a valve (24) for controlling fluid inflow and outflow is installed at the fluid inlet (11) and fluid outlet (12) of the center case (13) and side cases (14a, 14b). Claim 6 A composite sodium hypochlorite manufacturing apparatus according to claim 1 or claim 5, characterized in that each fluid inlet (11) of the center case (13) and the side cases (14a, 14b) is installed parallel to the lower front side of the case, and each fluid outlet (12) is installed parallel to the upper rear side of the case.

Images