A heat exchanger for a ship

Abstract

The present invention discloses a heat exchanger for ships, which includes a first outer shell and a second outer shell. Pipes are arranged in both the first outer shell and the second outer shell. The pipes are arranged in an S shape, and metal fin plates are fixedly connected to the outside of the pipes. One end of the pipe located in the first outer shell is an inlet, and the other end is a first outlet and a first connecting pipe. A cushion block is fixedly connected to the upper end of the first outer shell, and the second outer shell is pressed on the cushion block. The first connecting pipe passes through the cushion block. One end of the pipe in the second outer shell is a second connecting pipe, and the other end is a second outlet. The first connecting pipe and the second connecting pipe can communicate with each other. When the device is implemented, it can facilitate the user to splice and use the first outer shell and the second outer shell. That is, when the temperature of the water cooling is constant and the flow rate of the water is constant, by increasing the number of heat exchangers, the heat exchange effect can be improved. Moreover, when the device is spliced, it is convenient to install and use, and it can be used immediately after being placed.

Description

Technical Field

[0001] The invention belongs to the technical field of heat exchangers, and in particular relates to a heat exchanger for ships. Background Art

[0002] Heat exchangers are a common device on ships. When a heat exchanger is used, the user passes hot water and cold water into the heat exchanger respectively, and the heat in the hot water is transferred to the cold water through heat conduction.

[0003] Once the heat exchanger is installed and operated, its heat exchange capacity is mostly determined, that is, the heat exchange rate between hot water and cold water is relatively constant. To make the heat exchange more thorough, either increase the number of heat exchangers or circulate hot water into the heat exchanger. On a ship, circulating hot water into the heat exchanger requires rearranging and installing the pipelines, which is difficult when the ship is sailing, especially when sailing at sea; and the traditional way of splicing heat exchangers has problems such as inconvenient splicing and easy leakage of connecting pipes. For this reason, this application proposes a heat exchanger for ships. Summary of the invention

[0004] In order to solve the problems raised in the above background technology, the present invention provides the following technical solutions: A heat exchanger for a ship, comprising a first shell and a second shell, wherein pipes are arranged in an S shape, and metal fins are fixedly connected to the outside of the pipes.

[0005] One end of the pipe in the first shell is an inlet, and the other end is a first outlet and a first connecting pipe. A cushion block is fixedly connected to the upper end of the first shell, and the second shell is pressed on the cushion block. The first connecting pipe passes through the cushion block. One end of the pipe in the second shell is a second connecting pipe, and the other end is a second outlet. The first connecting pipe and the second connecting pipe can be connected to each other.

[0006] The first connecting tube and the second connecting tube are both fixedly connected with sleeves, a slot is provided on the first connecting tube, an insert block is fixedly connected to the end of the second connecting tube, and the insert block is inserted into the slot, so that the first connecting tube is connected with the second connecting tube.

[0007] A cam is arranged in the cushion block, and a toggle rod is inserted in the cushion block. The toggle rod can move up and down. When the second shell is placed on the first shell, the toggle rod can be pressed downward. In the process of the toggle rod moving downward, the cam can first slide to the upper side of the sleeve and then rotate. In the process of the cam rotating, the distal end of the cam can be pressed on the sleeve to tightly connect the first connecting tube with the second connecting tube.

[0008] The second connecting pipe passes through the side wall of the second shell, and a first spring is arranged in the second shell. The first spring is sleeved outside the second connecting pipe, and the second connecting pipe is connected to the pipeline in the second shell through a hose so that the second connecting pipe can move up and down.

[0009] Preferably, a rotating shaft is rotatably provided in the cushion block, the rotating shaft is connected to the cam, and a rectangular rod is fixed on the rotating shaft, a rectangular groove is opened on the cam, and the rectangular rod is inserted into the rectangular groove, so that when the rotating shaft rotates, the cam can rotate accordingly, and a third spring is provided in the rectangular groove.

[0010] Preferably, a top block is provided on one side of the cam, a first rotating rod is hingedly connected to a side of the top block away from the cam, a second rotating rod is hingedly connected to an end of the first rotating rod away from the top block, an end of the second rotating rod away from the first rotating rod is hingedly connected to a cushion block, a fixing rod is fixedly connected to the toggle rod, when the toggle rod moves downward, the fixing rod presses the connection between the first rotating rod and the second rotating rod downward to push the cam, and the fixing rod is made of elastic material, when the first rotating rod and the second rotating rod are rotated to the extreme position, the fixing rod can bend and pass over the first rotating rod and the second rotating rod.

[0011] Preferably, the first rotating rod and the second rotating rod form a support unit, the support unit has a hinge point, the fixed rod can contact the hinge point, and when the cam is located on one side of the sleeve, the inner angle of the support unit is a first inner angle, and when the cam extends above the sleeve, the support unit passes the straight shape and has a second inner angle, and the second inner angle is greater than the first inner angle.

[0012] Preferably, a toggle gear is fixedly connected to the rotating shaft, and a first rack is arranged on the toggle rod, and the first rack can cooperate with the toggle gear to make the rotating shaft rotate.

[0013] Preferably, a first control screw is provided on the first connecting tube, the first control screw is inserted into the first connecting tube, and the two are threadedly matched, and the first control screw is used to control the opening and closing of the first connecting tube, an extension rod is fixedly connected to the lower end of the toggle rod, a second rack is provided on the extension rod, and a first gear is provided on the first control screw, the second rack cooperates with the first gear, so that when the toggle rod moves downward, the first control screw rotates accordingly to open the first connecting tube, and a torsion spring is also sleeved outside the first control screw.

[0014] Preferably, the lower end of the toggle rod is fixedly connected to two single teeth, each single tooth is fixedly connected to a fixing rod, and a second spring is disposed on the outer sleeve of the toggle rod.

[0015] Preferably, a third rack is further arranged in the spacer block, and a second control screw is arranged at the first outlet. The first outlet is in threaded cooperation with the second control screw, and a second gear is arranged at the end of the second control screw. The second gear cooperates with the third rack to control the opening and closing of the first outlet.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] When the device is implemented, it can facilitate the user to splice and use the first housing and the second housing. That is, when the temperature of the water cooling is constant and the flow rate of the water is constant, by increasing the number of heat exchangers, the heat exchange effect can be improved. Moreover, when the device is spliced, it is convenient to install and use, and it can be used immediately after being placed, abandoning the traditional form of manually controlling the valve. After the second housing is placed on the first housing, the opening / closing of the pipeline can be realized, which further facilitates the user's use. In order to meet the further needs of the user, this solution can also be set as a modular design, that is, a third housing, a fourth housing, etc. can also be provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention, and do not constitute a limitation to the present invention. In the drawings:

[0019] Figure 1 is a schematic structural diagram of the whole of the present invention;

[0020] Figure 2 is a schematic connection structure diagram of the local first connecting pipe, second connecting pipe and hose of the present invention;

[0021] Figure 3 is a schematic internal structure diagram of the spacer block of the partition board of the present invention;

[0022] Figure 4 For the present invention Figure 3 is an enlarged structural diagram of part A in the present invention;

[0023] Figure 5 is an enlarged structural diagram of the cam of the present invention;

[0024] Figure 6 is a schematic side structure diagram of the cam of the present invention;

[0025] Figure 7 is a three-dimensional structural diagram of the cam of the present invention;

[0026] Figure 8 is a schematic cooperation structure diagram of the cam and the rotating shaft of the present invention;

[0027] Figure 9Schematic enlarged structure diagram of the toggle lever of the present invention;

[0028] Figure 10 Schematic cooperation structure diagram of the first outlet of the present invention and the cushion block.

[0029] In the figure: 1. First outer shell; 2. Second outer shell; 3. Pipe; 4. Metal fin; 5. Inlet; 6. First outlet; 7. First connecting pipe; 8. Second connecting pipe; 9. Hose; 10. First spring; 11. Second outlet; 12. Cushion block; 13. Toggle lever; 14. Second spring; 15. Cam; 16. Rotating shaft; 17. Extension rod; 18. First control screw; 19. Torsion spring; 20. Rectangular rod; 21. Third spring; 22. Top block; 23. Toggle gear; 24. First rack; 25. Rectangular groove; 26. First rotating rod; 27. Second rotating rod; 28. Fixed rod; 29. Second rack; 30. Third rack; 31. Second control screw. Detailed implementation manners

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] As Figures 1-10 given, the present invention discloses a heat exchanger for ships, including a first outer shell 1 and a second outer shell 2. Pipes 3 are provided inside both the first outer shell 1 and the second outer shell 2. The pipes 3 are arranged in an S shape, and metal fins 4 are fixedly connected outside the pipes 3.

[0032] When this solution is implemented, hot water flows in the pipes 3, and cold water is introduced into the first outer shell 1 and the second outer shell 2. Heat exchange is carried out through the pipes 3 and the metal fins 4, and the arrangement of the metal fins 4 can improve the heat exchange efficiency.

[0033] One end of the pipe 3 located inside the first outer shell 1 is the inlet 5, and the other end is the first outlet 6 and the first connecting pipe 7. Through the inlet 5, hot water can be introduced into the pipe 3. Both the first outlet 6 and the first connecting pipe 7 are the water outlet ends of the pipe 3. A cushion block 12 is fixedly connected to the upper end of the first outer shell 1. The second outer shell 2 is pressed on the cushion block 12. The first connecting pipe 7 passes through the cushion block 12. One end of the pipe 3 inside the second outer shell 2 is the second connecting pipe 8, and the other end is the second outlet 11. The first connecting pipe 7 and the second connecting pipe 8 can communicate with each other.

[0034] When the first outer shell 1 is used alone, hot water enters through the inlet 5 and is discharged through the first outlet 6. When the first outer shell 1 is joined with the second outer shell 2, hot water enters through the inlet 5, enters the second connecting pipe 8 through the first connecting pipe 7, and finally is discharged from the second outlet 11. The use of the spacer 12 can prevent direct contact between the first outer shell 1 and the second outer shell 2, and the use of the spacer 12 also facilitates the alignment of the second outer shell 2 with the first outer shell 1 during installation.

[0035] Of course, a cold water inlet and a cold water outlet are respectively provided on the first outer shell 1 and the second outer shell 2, which are not described in alignment in the figures of this application.

[0036] Sleeves are fixedly connected to the outside of both the first connecting pipe 7 and the second connecting pipe 8. A slot is provided on the first connecting pipe 7, and a plug is fixedly connected to the end of the second connecting pipe 8. The plug is inserted into the slot to connect the first connecting pipe 7 and the second connecting pipe 8. The use of the plug and the slot can ensure the sealing performance of the connection between the first connecting pipe 7 and the second connecting pipe 8, guaranteeing that no water leakage occurs during their connection. A sealing gasket can also be provided in the slot.

[0037] A cam 15 is provided in the spacer 12, and a toggle rod 13 is inserted into the spacer 12. The toggle rod 13 can move up and down. When the second outer shell 2 is placed on the first outer shell 1, the toggle rod 13 can be pressed downward. During the downward movement of the toggle rod 13, the cam 15 can first slide upward above the sleeve and then rotate. During the rotation of the cam 15, the distal end of the cam 15 can press on the sleeve to tightly connect the first connecting pipe 7 and the second connecting pipe 8.

[0038] During installation, the second outer shell 2 is placed on the first outer shell 1. Due to the use of the spacer 12, the position of the second outer shell 2 can be limited. When the second outer shell 2 presses on the first outer shell 1, the toggle rod 13 can be pressed downward by the second outer shell 2. At this time, the cam 15 is pushed above the sleeve, and then the cam 15 rotates and presses on the sleeve, improving the tightness of the connection between the first connecting pipe 7 and the second connecting pipe 8, and thus ensuring the sealing performance of the connection between the first connecting pipe 7 and the second connecting pipe 8.

[0039] The second connecting pipe 8 penetrates the side wall of the second outer shell 2, and a first spring 10 is provided inside the second outer shell 2. The first spring 10 is sleeved outside the second connecting pipe 8, and the second connecting pipe 8 is connected to the pipe 3 inside the second outer shell 2 through a hose 9, enabling the second connecting pipe 8 to move up and down. The use of the hose 9 and the first spring 10 both endow the second connecting pipe 8 with the function of moving up and down, making the connection between the first connecting pipe 7 and the second connecting pipe 8 closer.

[0040] A rotating shaft 16 is rotatably provided in the cushion block 12, the rotating shaft 16 is connected to the cam 15, and a rectangular rod 20 is fixed to the rotating shaft 16. A rectangular groove 25 is opened on the cam 15, and the rectangular rod 20 is inserted into the rectangular groove 25, so that when the rotating shaft 16 rotates, the cam 15 can rotate accordingly, and a third spring 21 is provided in the rectangular groove 25.

[0041] The use of the rectangular rod 20 and the rectangular groove 25 can ensure that when the device is in use, the cam 15 can slide along the rotating shaft 16, and when the rotating shaft 16 rotates, the cam 15 can rotate accordingly. The cam 15 is a disc structure, and the axes of the rotating shaft 16 and the cam 15 are located on different straight lines. In the initial position, the rotating shaft 16 is closer to the lower end of the cam 15, and the rotating shaft 16 is farther (distal) from the upper end of the cam 15. Therefore, when the cam 15 extends above the sleeve, the cam 15 does not contact the sleeve. After the cam 15 rotates, the surface of the cam 15 can be pressed on the sleeve, thereby pressing the second connecting tube 8 downward, and ensuring the tightness of the connection between the first connecting tube 7 and the second connecting tube 8.

[0042] In order to enable the cam 15 to slide to the top of the sleeve, the following technical solution is provided: a top block 22 is provided on one side of the cam 15, a first rotating rod 26 is hingedly connected to a side of the top block 22 away from the cam 15, a second rotating rod 27 is hingedly connected to an end of the first rotating rod 26 away from the top block 22, an end of the second rotating rod 27 away from the first rotating rod 26 is hingedly connected to the cushion block 12, a fixing rod 28 is fixedly connected to the toggle rod 13, when the toggle rod 13 moves downward, the fixing rod 28 presses the connection between the first rotating rod 26 and the second rotating rod 27 downward to push the cam 15, and the fixing rod 28 is made of elastic material, when the first rotating rod 26 and the second rotating rod 27 are rotated to the extreme position, the fixing rod 28 can bend and pass over the first rotating rod 26 and the second rotating rod 27.

[0043] The first rotating rod 26 and the second rotating rod 27 form a support unit, which has a hinge point. The fixed rod 28 can contact the hinge point, and when the cam 15 is located on one side of the sleeve, the inner angle of the support unit is a first inner angle. When the cam 15 extends above the sleeve, the support unit passes the straight state and has a second inner angle, and the second inner angle is greater than the first inner angle.

[0044] As shown in the figure, the state of the first rotating rod 26 and the second rotating rod 27, in this state, the cam 15 is already located above the sleeve. At this time, due to the abutment between the first rotating rod 26 and the top block 22 at the hinged position, the first rotating rod 26 can no longer continue to rotate, that is, the cam 15 is pushed by the top block 22 and maintains the state shown in the figure. The top block 22 and the cam 15 are only in contact with each other but not connected to each other. Therefore, when the cam 15 is moved by the rotating shaft 16, the cam 15 can rotate.

[0045] When the second housing 2 is placed on the first housing 1, the hinge point of the first rotating rod 26 and the second rotating rod 27 is above its horizontal position. As the shifting rod 23 moves downward, the fixed rod 28 on the shifting rod 13 can press on the first rotating rod 26 or the second rotating rod 27, thereby causing it to rotate downward to reach the position shown in the figure. After reaching this position, the first rotating rod 26 and the second rotating rod 27 can no longer continue to rotate downward, and the fixed rod 28 is elastic and can bend. At this time, as the shifting rod 13 continues to move downward, the fixed rod 28 can cross over the first rotating rod 26 and the second rotating rod 27, and the first rotating rod 26 and the second rotating rod 27 can still maintain the state shown in the figure.

[0046] A shifting gear 23 is fixedly connected to the rotating shaft 16, and a first rack 24 is provided on the shifting rod 13. The first rack 24 can cooperate with the shifting gear 23 to cause the rotating shaft 16 to rotate.

[0047] After the first rotating rod 26 and the second rotating rod 27 are shifted to the position shown in the figure, the shifting rod 13 can continue to move downward. At this time, the first rack 24 can shift the shifting gear 23, thereby causing the rotating shaft 16 to rotate, that is, the cam 15 rotates until the cam 15 presses tightly on the sleeve.

[0048] In some alternative embodiments, the following technical solution is further included: a first control screw 18 is provided on the first connecting pipe 7. The first control screw 18 is inserted into the first connecting pipe 7 and the two are in threaded cooperation. The first control screw 18 is used to control the opening and closing of the first connecting pipe 7. An extension rod 17 is fixedly connected to the lower end of the shifting rod 13. A second rack 29 is provided on the extension rod 17. A first gear is provided on the first control screw 18. The second rack 29 cooperates with the first gear so that when the shifting rod 13 moves downward, the first control screw 18 rotates accordingly to open the first connecting pipe 7. A torsion spring 19 is also sleeved outside the first control screw 18.

[0049] That is to say, the first control screw 18 can control the opening and closing of the first connecting pipe 7. After the cam 15 presses on the sleeve, at this time, the first connecting pipe 7 and the second connecting pipe 8 are tightly connected. Then the shifting rod 13 can still continue to move downward, thereby shifting the first control screw 18, so that the first connecting pipe 7 is in a through state. In order to ensure the stability of the cam 15, the material of the first rack 24 is also made of an elastic material. That is, after the cam 15 presses tightly on the sleeve, as the shifting rod 13 continues to move downward, the teeth on the first rack 24 can bend and cross over the shifting gear 23, thereby preventing the shifting gear 23 from reversing.

[0050] The lower end of the toggle lever 13 is fixedly connected with two single teeth, and a fixing rod 28 is fixedly connected to each single tooth. A second spring 14 is sleeved outside the toggle lever 13. When the second housing 2 is removed from the first housing 1, the toggle lever 13 can pop up upward under the action of the second spring 14. During this process, the fixing rod 28 toggles the first rotating rod 26 and the second rotating rod 27 from bottom to top, so that the cam 15 moves to one side of the sleeve. The use of the third spring 21 can further ensure that the cam 15 can reset.

[0051] In some embodiments, there is: a third rack 30 is further provided in the cushion block 12, a second control screw 31 is provided on the first outlet 6, the first outlet 6 is in threaded cooperation with the second control screw 31, and a second gear is provided at the end of the second control screw 31. The second gear cooperates with the third rack 30 to control the opening and closing of the first outlet 6. After the cam 15 presses on the sleeve, as the second housing 2 presses on the cushion block 12, the second housing 2 can also press on the third rack 30, so that the second control screw 31 can rotate, and then the first outlet 6 is closed.

[0052] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0053] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A heat exchanger for a ship, comprising a first shell (1) and a second shell (2), characterized in that: The first shell (1) and the second shell (2) are both provided with a pipe (3), the pipe (3) is arranged in an S shape, and a metal fin plate (4) is fixedly connected to the outside of the pipe (3). One end of the pipe (3) located in the first shell (1) is an inlet (5), and the other end thereof is a first outlet (6) and a first connecting pipe (7). A cushion block (12) is fixedly connected to the upper end of the first shell (1), the second shell (2) is pressed on the cushion block (12), the first connecting pipe (7) passes through the cushion block (12), one end of the pipe (3) in the second shell (2) is a second connecting pipe (8), and the other end thereof is a second outlet (11), the first connecting pipe (7) and the second connecting pipe (8) can be connected to each other, The first connecting tube (7) and the second connecting tube (8) are both fixedly connected with sleeves, a slot is provided on the first connecting tube (7), an insert block is fixedly connected to the end of the second connecting tube (8), and the insert block is inserted into the slot, so that the first connecting tube (7) and the second connecting tube (8) are connected. A cam (15) is arranged in the cushion block (12), and a toggle rod (13) is inserted into the cushion block (12). The toggle rod (13) can move up and down. When the second housing (2) is placed on the first housing (1), the toggle rod (13) can be pressed downward. During the downward movement of the toggle rod (13), the cam (15) can first slide toward the upper side of the sleeve and then rotate. During the rotation of the cam (15), the distal end of the cam (15) can press on the sleeve to tightly connect the first connecting tube (7) and the second connecting tube (8). The second connecting tube (8) passes through the side wall of the second shell (2), and a first spring (10) is arranged in the second shell (2). The first spring (10) is sleeved outside the second connecting tube (8), and the second connecting tube (8) is connected to the pipe (3) in the second shell (2) through a hose (9), so that the second connecting tube (8) can move up and down. A rotating shaft (16) is rotatably arranged in the cushion block (12), the rotating shaft (16) is connected to the cam (15), a rectangular rod (20) is fixedly connected to the rotating shaft (16), a rectangular groove (25) is provided on the cam (15), the rectangular rod (20) is inserted into the rectangular groove (25), so that when the rotating shaft (16) rotates, the cam (15) can rotate accordingly, and a third spring (21) is arranged in the rectangular groove (25). A top block (22) is provided on one side of the cam (15), and a first rotating rod (26) is hingedly connected to a side of the top block (22) away from the cam (15); a second rotating rod (27) is hingedly connected to an end of the first rotating rod (26) away from the top block (22); an end of the second rotating rod (27) away from the first rotating rod (26) is hingedly connected to the cushion block (12); a fixing rod (28) is fixedly connected to the toggle rod (13); when the toggle rod (13) moves downward, the fixing rod (28) presses the connection between the first rotating rod (26) and the second rotating rod (27) downward to push the cam (15); the fixing rod (28) is made of elastic material; when the first rotating rod (26) and the second rotating rod (27) rotate to the limit position, the fixing rod (28) can bend and pass over the first rotating rod (26) and the second rotating rod (27); The first rotating rod (26) and the second rotating rod (27) form a support unit, the support unit has a hinge point, the fixed rod (28) can contact the hinge point, and when the cam (15) is located on one side of the sleeve, the inner angle of the support unit is a first inner angle, and when the cam (15) extends above the sleeve, the support unit exceeds the straight state and has a second inner angle, and the second inner angle is greater than the first inner angle. A toggle gear (23) is fixedly connected to the rotating shaft (16), and a first rack (24) is arranged on the toggle rod (13). The first rack (24) can cooperate with the toggle gear (23) to make the rotating shaft (16) rotate. The material of the first rack (24) is also made of an elastic material, and the teeth on the first rack (24) can be bent to pass over the shifting gear (23).

2. A heat exchanger for a ship according to claim 1, characterized in that: A first control screw (18) is arranged on the first connecting tube (7), the first control screw (18) is inserted into the first connecting tube (7), and the two are threadedly matched, and the first control screw (18) is used to control the opening and closing of the first connecting tube (7). An extension rod (17) is fixedly connected to the lower end of the toggle rod (13), and a second rack (29) is arranged on the extension rod (17). A first gear is arranged on the first control screw (18), and the second rack (29) matches the first gear so that when the toggle rod (13) moves downward, the first control screw (18) rotates accordingly to open the first connecting tube (7). A torsion spring (19) is also sleeved outside the first control screw (18). The lower end of the toggle rod (13) is fixedly connected to two single teeth, each of which is fixedly connected to a fixing rod (28), and a second spring (14) is disposed on the outer sleeve of the toggle rod (13).

3. A heat exchanger for a ship according to claim 1, characterized in that: A third rack (30) is also provided in the cushion block (12), a second control screw (31) is provided on the first outlet (6), the first outlet (6) and the second control screw (31) are threadedly matched, and a second gear is provided at the end of the second control screw (31), and the second gear cooperates with the third rack (30) to control the opening and closing of the first outlet (6).

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