Pure water circulating device and circulating method
By adopting air pressure differential pumping method and intermittent cooling water transport method in the pure water circulation system, the pollution problem caused by insufficient sealing of the water pump is solved, and the impurity content and higher heat exchange efficiency are achieved, which extends the service life of the cooling water and reduces maintenance costs.
Patent Information
- Application Number
- CN202411909777.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-24
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2044-12-24
AI Technical Summary
In the existing pure water circulation system, the sealing performance of the water pump is insufficient or the sealing performance decreases after long-term use, causing lubricating oil to enter the cooling water, contaminate the cooling water, shorten the service life of the cooling water, and increase maintenance costs.
A pure water circulation device is adopted, which pumps water through air pressure differential to avoid pollution problems caused by water passage through water pumps. The device includes a pipe body, a pipe and a cylinder. Through the cooperation of the piston and the slider, the intermittent transportation of cooling water is realized, forming turbulence, and improving heat exchange efficiency.
It reduces the water change frequency of cooling water, reduces the impurity content in the cooling water, improves the heat exchange capacity, extends the service life of the cooling water, and reduces maintenance costs.
Smart Images

Figure CN119712483A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of water circulation equipment, and more specifically, to a pure water circulation device and a circulation method. Background Art
[0002] Pure water cooling technology is widely used in electronics, electricity, food and other fields due to its environmental protection and energy-saving technical characteristics. The water circulation power of the pure water cooling system generally comes from the water pump. The cooling water passes through the inside of the water pump and circulates between the pipes. The operation of the water pump requires the addition of lubricating oil, which greatly increases the sealing performance requirements of the water pump. Insufficient sealing of the water pump or decreased sealing performance after long-term use will cause lubricating oil to enter the cooling water and pollute the cooling water, shortening the service life of the cooling water, and increasing pollution to the pipe wall, increasing maintenance costs. Summary of the invention
[0003] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art and provide a pure water circulation device and a circulation method to reduce the frequency of water changes and improve the heat exchange efficiency.
[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a pure water circulation device, including pipe body 2, pipe body 3, and a pipeline. Pipe body 2, pipe body 3, and the pipeline are connected end to end and form a circulating waterway inside. Pipe body 2 includes an extension pipe 1 located at the end. Pipe body 3 and the pipeline are both lower in height than extension pipe 1. Pipe body 3 includes extension pipe 2. Extension pipe 2 is installed at the lower end of the extension pipe. A pipe body assembly is installed at the upper end of extension pipe 1. The bottom of the pipe body assembly is connected to extension pipe 1, and the top of extension pipe 2 is connected to extension pipe 1. The pipe body assembly includes pipe body 1. A slider is slidably connected to the inner wall of the pipe body assembly. The slider divides the inner wall of the pipe body assembly into upper and lower parts. The cloth has inner cavity one and inner cavity two; it also includes a tube, a closed cavity is arranged in the tube, a piston is installed on the inner wall of the tube, the piston can move along the axial direction of the tube, the piston divides the cavity in the tube into cavity one and cavity two, and cavity two is connected with the inner cavity one; a fixed plate and a slide plate are installed on the inner wall of the extension tube two, the slide plate is located below the fixed plate, the slide plate can move up and down along the axial direction of the extension tube two, the fixed plate is provided with a through hole one, the slide plate is provided with a through hole two, a sealing ball is installed on the slide plate, the sealing ball is located below the through hole one, and when the slide plate moves upward, it drives the sealing ball to move upward so that the sealing ball closes the bottom of the through hole one; the pipeline is used to connect with the heat dissipation pipeline of the components to be cooled.
[0005] The present invention is further configured such that the extension tube 2 is provided with a boss 3, the upper end surface of the boss 3 is in contact with the lower end surface of the fixing plate, and the through hole 1 axially penetrates the fixing plate.
[0006] The present invention is further configured to include cylinder 2, a connecting rod is installed at the output end of cylinder 2, a connecting ring is installed on the connecting rod, extension tube 2 passes through the connecting ring, the connecting ring is located radially outside the slide plate, the slide plate is made of iron material, and the connecting ring is a magnet. When the connecting ring moves up and down, it drives the slide plate to move up and down, so that the sealing ball can move up and down.
[0007] The present invention is further configured to include a limiting cylinder, a connecting ring is inserted into the limiting cylinder, the connecting ring can move up and down along the inner wall of the limiting cylinder, the limiting cylinder is provided with a second groove body, a connecting rod passes through the second groove body, and the connecting rod can move up and down along the inner wall of the second groove body.
[0008] The present invention is further configured such that the outer wall of the slider is clearance-matched with the inner wall of the tube.
[0009] The present invention is further configured such that the sliding block is provided with a groove.
[0010] The present invention is further configured such that the tube body assembly also includes a tube sleeve located at the bottom, the bottom of the tube sleeve is connected to the extension tube 1, the tube sleeve is provided with a boss 1, and when the slider is located at the lower end limit position, the upper end of the boss 1 abuts against the lower end of the slider.
[0011] The present invention is further configured such that air channel one is provided on one side of the slider, air channel one is connected with inner cavity one, the tube sleeve is provided with an annular groove and air channel two, the annular groove is connected with air channel two, air channel two is connected with inner cavity two located below boss one, and when the slider is located at the lower end limit position, air channel one is connected with the annular groove at one end away from inner cavity one.
[0012] The present invention also adopts the following technical solution: a circulation method of a pure water circulation device, comprising the following steps:
[0013] ① The connecting ring moves upward to drive the slide plate to move upward, thereby driving the sealing ball to abut against the bottom of the through hole 1, so that the fixed plate closes the extension tube 2, and the cavity above the fixed plate is connected with the extension tube 1 and the inner cavity 2. The piston moves to the left, the air pressure in the inner cavity 1 decreases, and a pressure difference appears on the upper and lower sides of the slider. The slider moves upward, and the cooling water in the tube body 2 is sucked upward into the extension tube 1 and the extension tube 2;
[0014] ② The piston moves to the right, the air pressure in the inner chamber 1 increases, the slider falls back downward, and the connecting ring moves downward to drive the slide plate to move downward, thereby driving the sealing ball to separate from the bottom of the through hole 1, so that the fixed plate opens the extension tube 2, and the cooling water above the fixed plate flows downward, and the liquid level of the tube body 2 and the extension tube 2 return to the same horizontal plane.
[0015] In summary, the present invention has the following beneficial effects:
[0016] 1. The water circulation power adopts the air pressure difference to pump water, which avoids the pollution problem caused by the water passing through the water pump, reduces the frequency of cooling water replacement, reduces the impurity content in the cooling water, and improves the heat exchange capacity.
[0017] 2. When the slider is located at the lower extreme position, the inner cavity one and the inner cavity two can be interconnected through the airway one, the annular groove, and the airway two, so that the air pressure in the inner cavity one and the inner cavity two tends to be balanced, so that when extracting cooling water, the inner cavity two can reach a lower air pressure value, and the extraction efficiency is higher.
[0018] 3. During the circulation, the intermittent delivery of cooling water causes turbulence in the cooling water inside the pipeline. When the cooling water exchanges heat with the heat dissipation pipes in the components to be cooled, the cooling water close to the contact point heats up quickly. Through the turbulent flow, the cooling water close to the contact point is promptly merged with the cooling water far from the contact point, thereby improving the heat exchange effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 is a cross-sectional schematic diagram of an embodiment;
[0020] Figure 2 for Figure 1 The enlarged view of point A in the middle;
[0021] Figure 3 for Figure 1 The enlarged view of point B in the middle;
[0022] Figure 4 It is a cross-sectional view of the limiting cylinder in the embodiment.
[0023] Figure numerals: tube body assembly 1, tube body 11, slider 12, airway 1 121, groove 122, sleeve 13, boss 1 131, ring groove 132, airway 2 133, airway 3 1331, inner cavity 14, inner cavity 2 15, tube body 2 2, extension tube 1 21, tube body 3 3, extension tube 2 31, boss 3 311, boss 4 312, fixing plate 32, through hole 1 321, slide plate 33, through hole 2 331, groove body 1 332, through hole 3 333, sealing ball 34, pipeline 4, pipeline 1 41, pipeline 2 42, pipeline 3 43, components to be cooled 5, tube 6, cavity 1 61, cavity 2 62, piston 63, cylinder 1 7, cylinder 2 8, connecting rod 81, connecting ring 82, limiting cylinder 9, groove body 2 91. DETAILED DESCRIPTION
[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0025] like Figure 1As shown, this embodiment discloses a pure water circulation device, including a pipe body 2, a pipe body 3, and a pipeline 4, wherein the pipe body 2, the pipe body 3, and the pipeline 4 are connected end to end and form a circulating waterway inside. Specifically, the pipe body 2 includes an extension pipe 1 21 located at the upper end, and the extension pipe 1 21 is arranged in the horizontal direction in the axial direction, and the pipe body 3 includes an extension pipe 2 31 located at the upper end, and the extension pipe 2 31 is installed at the lower end of the extension pipe 1 21, and the extension pipe 2 31 is arranged vertically in the axial direction, and the top of the extension pipe 2 31 is connected to the extension pipe 1 21, and the height positions of the pipe body 3 and the pipeline 4 are lower than the extension pipe 1 21. The pipeline 4 includes a pipeline 1 41, a pipeline 2 42, and a pipeline 3 43, and the pipe body 3 3 is interconnected with the pipeline 1 41, the pipeline 2 42, and the pipeline 3 43, and the heat dissipation pipeline of the component 5 to be dissipated is also connected between the pipeline 2 42 and the pipeline 3 43, and the cooling water is transported through the heat dissipation pipeline of the component 5 to be dissipated to perform heat exchange on the heat dissipation component 5.
[0026] like Figure 1 , Figure 3 As shown, a fixing plate 32 and a sliding plate 33 are installed on the inner wall of the second extension tube 31. The sliding plate 33 is located below the fixing plate 32 and can move up and down along the axial direction of the second extension tube 31. A boss 311 is provided on the inner wall of the second extension tube 31, and the upper end surface of the boss 311 is in contact with the lower end surface of the fixing plate 32. The fixing plate 32 is also provided with a through hole 1 321, which axially penetrates the fixing plate 32, and four through holes 1 321 are evenly distributed along the circumference of the fixing plate 32.
[0027] like Figure 3 As shown, the slide plate 33 is provided with a second through hole 331, and the second through hole 331 axially penetrates the slide plate 33. The slide plate 33 is also provided with a groove body 1 332, which is concave downward along the upper end surface of the slide plate 33, and the groove bodies 1 332 are evenly distributed along the circumference of the slide plate 33. The groove bodies 1 332 and the through holes 1 321 are arranged one by one up and down. The groove bodies 1 332 are installed with sealing balls 34, which are inserted into the groove bodies 1 332, and the sealing balls 34 are located below the through holes 1 321, and the center of the sealing balls 34 is at the same height as the upper end surface of the slide plate 33. The slide plate 33 is provided with a third through hole 333, and the third through hole 333 is located below the groove body 1 332, and the third through hole 333 penetrates the slide plate 33 downward along the bottom surface of the groove body 1 332.
[0028] A boss 4 312 is formed on the inner wall of the second extension tube 31 . When the slide plate 33 is located at the lower limit position, the bottom of the slide plate 33 abuts against the top of the boss 4 312 .
[0029] like Figure 1 , Figure 3As shown, it also includes a cylinder 2 8, a connecting rod 81 is installed at the output end of the cylinder 2 8, and a connecting ring 82 is installed on the connecting rod 81. The extension tube 2 31 passes through the connecting ring 82, and the connecting ring 82 is located on the radial outside of the slide plate 33. The slide plate 33 is made of iron material, and the connecting ring 82 is a magnet. When the connecting ring 82 moves up and down, it drives the slide plate 33 to move up and down, thereby driving the sealing ball 34 to move synchronously. The sealing ball 34 moves upward so that the sealing ball 34 blocks the bottom of the through hole 1 321 to close it.
[0030] like Figure 3 , Figure 4 As shown, it also includes a limiting cylinder 9, a connecting ring 82 is inserted into the limiting cylinder 9, and the connecting ring 82 can move up and down along the inner wall of the limiting cylinder 9. The limiting cylinder 9 is provided with a second groove body 91, and a connecting rod 81 passes through the second groove body 91, and the connecting rod 81 can move up and down along the inner wall of the second groove body 91.
[0031] like Figure 1 , Figure 2 As shown, the upper end of the extension tube 1 21 is installed with a tube body assembly 1, and the bottom of the tube body assembly 1 is connected to the extension tube 1 21. Specifically, the tube body assembly 1 includes a tube body 11, and the inner wall of the tube body assembly 1 is slidably connected with a slider 12, and the slider 12 divides the inner wall of the tube body assembly 1 into an inner cavity 14 and an inner cavity 2 15 distributed up and down, and the inner cavity 2 15 is connected to the extension tube 1 21. The outer wall of the slider 12 is matched with the inner wall of the tube 6 in a clearance, so that the inner cavity 14 and the inner cavity 2 15 are reduced through the clearance between the outer wall of the slider 12 and the inner wall of the tube 6.
[0032] It also includes a tube 6, which has a sealed cavity inside. A piston 63 is installed on the inner wall of the tube 6. The piston 63 is driven by a cylinder 7. The piston 63 can move axially along the tube 6. The piston 63 divides the cavity inside the tube 6 into a cavity 1 61 and a cavity 2 62. The cavity 2 62 is connected to the inner cavity 14. When the piston 63 moves to the left, the air pressure in the cavity 2 62 and the inner cavity 14 decreases, and a pressure difference occurs between the upper and lower ends of the slider 12, and the slider 12 moves upward. The slider 12 is provided with a groove 122 to reduce weight.
[0033] like Figure 2 As shown, the pipe body assembly 1 also includes a pipe sleeve 13 at the bottom, the bottom of the pipe body 11 is inserted into the upper end of the pipe sleeve 13, and the bottom of the pipe sleeve 13 is connected to the extension pipe 1 21. The pipe sleeve 13 is provided with a boss 131, and when the slider 12 is at the lower end limit position, the upper end of the boss 131 abuts against the lower end of the slider 12.
[0034] like Figure 2As shown, one side of the slider 12 is provided with an air channel 121, one end of which passes through the upper end surface of the slider 12 and communicates with the inner cavity 14, and the other end of the air channel 121 passes through the side wall of the slider 12. The pipe sleeve 13 is provided with an annular groove 132 and an air channel 133. The annular groove 132 is recessed radially outward along the inner wall of the pipe sleeve 13 to form an annular groove. When the slider 12 is at the lower end limit position, the end of the air channel 121 away from the inner cavity 14 is communicated with the annular groove 132. The annular groove 132 is communicated with the air channel 133, and the air channel 133 includes an air channel 3 1331, and the air channel 3 1331 is communicated with the inner cavity 2 15 located below the boss 131.
[0035] Since the outer wall of the slider 12 and the inner wall of the tube 6 are in clearance fit, the side with higher air pressure in the inner cavity 14 and the inner cavity 2 15 will blow gas to the side with lower air pressure. When the air pressure in the inner cavity 14 is higher and the air pressure in the inner cavity 2 15 is lower, when the piston 63 moves to the left, the inner cavity 14 reaches a lower air pressure to increase the response time of the slider 12 to start the rise, the slider 12 sensitivity decreases, and the distance that the slider 12 can rise decreases, so that the minimum air pressure value that the inner cavity 2 15 can reach is insufficient. Therefore, when the slider 12 is at the lower extreme position, the inner cavity 14 and the inner cavity 2 15 can be connected to each other through the airway 121, the annular groove 132, and the airway 2 133, so that the air pressure in the inner cavity 14 and the inner cavity 2 15 tends to be balanced.
[0036] The circulation method of the above-mentioned pure water circulation device is:
[0037] ① Such as Figure 3 As shown, in the non-working state, the liquid level of the pure water circulation device is the dotted line L in the figure, and the liquid level L is lower than the slide plate 33, so that a gas space is formed above the liquid level L in the pipeline. The connecting ring 82 moves upward to drive the slide plate 33 to move upward, thereby driving the sealing ball 34 to abut the bottom of the through hole 1 321, the fixed plate 32 closes the extension tube 2 31, and the cavity above the fixed plate 32 is connected with the extension tube 1 21 and the inner cavity 2 15.
[0038] The piston 63 moves to the left side driven by the cylinder 17, the air pressure in the inner cavity 14 decreases, a pressure difference is formed on the upper and lower sides of the slider 12, and the slider 12 moves upward, thereby reducing the air pressure in the extension tube 1 21 and the inner cavity 2 15 and making it greater than the air pressure in the extension tube 2 31 under the fixed plate 32, and the cooling water in the tube body 2 2 is sucked upward into the extension tube 1 21 and the extension tube 2 31.
[0039] When the piston 93 moves to the left, due to the rapid change in the air pressure in the inner cavity 14, the inner cavity 14 and the inner cavity 2 15 cannot produce air pressure balance in a very short time, so that the upper and lower sides of the slider 12 quickly produce a pressure difference and move upward. When the slider 12 moves upward, the airway 121 is immediately disconnected from the annular groove 132, and the inner cavity 14 and the inner cavity 2 15 are no longer connected.
[0040] ② The piston 63 moves to the right under the drive of the cylinder 7, the air pressure in the inner cavity 14 increases, and the slider 12 falls back downward. At the same time, the connecting ring 82 moves downward to drive the slide plate 33 to move downward, thereby driving the sealing ball 34 to separate from the bottom of the through hole 321, and the cooling water above the fixed plate 32 flows downward, and the liquid level surfaces of the tube body 22 and the extension tube 31 return to the same horizontal plane. The water circulation is completed by continuously sending the cooling water at the upper end of the tube body 22 into the extension tube 31. Due to the intermittent delivery of the cooling water during the circulation, the cooling water inside the pipeline forms turbulence. When the cooling water exchanges heat with the heat dissipation pipeline in the heat dissipation component 5, the cooling water close to the contact point heats up quickly, and the cooling water close to the contact point is promptly merged with the cooling water far from the contact point through the turbulent effect, thereby improving the heat exchange effect.
[0041] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.
Claims
1. A pure water circulation device, characterized in that: The invention comprises a pipe body 2 (2), a pipe body 3 (3), and a pipeline (4), wherein the pipe body 2 (2), the pipe body 3 (3), and the pipeline (4) are connected end to end and form a circulating water circuit inside, the pipe body 2 (2) comprises an extension pipe 1 (21) located at the end, the pipe body 3 (3) and the pipeline (4) are both lower than the extension pipe 1 (21), the pipe body 3 (3) comprises an extension pipe 2 (31), the extension pipe 2 (31) is installed at the lower end of the extension pipe 1 (21), the pipe body assembly (1) is installed at the upper end of the extension pipe 1 (21), the bottom of the pipe body assembly (1) is connected to the extension pipe 1 (21), and the top of the extension pipe 2 (31) is connected to the extension pipe 1 (21); The tube body assembly (1) comprises a tube body 1 (11), the inner wall of the tube body assembly (1) being slidably connected to a slider (12), the slider (12) dividing the inner wall of the tube body assembly (1) into an inner cavity 1 (14) and an inner cavity 2 (15) which are arranged in an upper and lower manner; It also comprises a tube (6), wherein a sealed cavity is provided in the tube (6), a piston (63) is installed on the inner wall of the tube (6), and the piston (63) can move axially along the tube (6), and the piston (63) divides the cavity in the tube (6) into a cavity 1 (61) and a cavity 2 (62), and the cavity 2 (62) is connected to the inner cavity 1 (14); The inner wall of the second extension tube (31) is provided with a fixed plate (32) and a slide plate (33), the slide plate (33) is located below the fixed plate (32), the slide plate (33) can move up and down along the axis of the second extension tube (31), the fixed plate (32) is provided with a through hole (321), the slide plate (33) is provided with a through hole (331), the slide plate (33) is provided with a sealing ball (34), the sealing ball (34) is located below the through hole (321), when the slide plate (33) moves upward, it drives the sealing ball (34) to move upward so that the sealing ball (34) seals the bottom of the through hole (321); The pipeline (4) is used to be connected to the heat dissipation pipeline of the component (5) to be cooled.
2. A pure water circulation device according to claim 1, characterized in that: The second extension tube (31) is provided with a third boss (311), the upper end surface of the third boss (311) is in contact with the lower end surface of the fixing plate (32), and the first through hole (321) axially penetrates the fixing plate (32).
3. A pure water circulation device according to claim 1, characterized in that: It also includes a second cylinder (8), the output end of the second cylinder (8) is equipped with a connecting rod (81), the connecting rod (81) is equipped with a connecting ring (82), the second extension tube (31) passes through the connecting ring (82), the connecting ring (82) is located radially outside the slide plate (33), the slide plate (33) is made of iron material, the connecting ring (82) is a magnet, and when the connecting ring (82) moves up and down, it drives the slide plate (33) to move up and down, so that the sealing ball (34) can move up and down.
4. A pure water circulation device according to claim 3, characterized in that: It also includes a limiting cylinder (9), the connecting ring (82) is inserted into the limiting cylinder (9), the connecting ring (82) can move up and down along the inner wall of the limiting cylinder (9), the limiting cylinder (9) is provided with a second groove body (91), the connecting rod (81) passes through the second groove body (91), and the connecting rod (81) can move up and down along the inner wall of the second groove body (91).
5. A pure water circulation device according to claim 1, characterized in that: The outer wall of the sliding block (12) is clearance-matched with the inner wall of the tube (6).
6. A pure water circulation device according to claim 1, characterized in that: The sliding block (12) is provided with a groove (122).
7. A pure water circulation device according to claim 1, characterized in that: The tube body assembly (1) further comprises a tube sleeve (13) located at the bottom, the bottom of the tube sleeve (13) being connected to the extension tube (21), the tube sleeve (13) being provided with a boss (131), and when the slider (12) is located at the lower end limit position, the upper end of the boss (131) abuts against the lower end of the slider (12).
8. A pure water circulation device according to claim 7, characterized in that: An air channel 1 (121) is provided on one side of the slider (12), and the air channel 1 (121) is communicated with the inner cavity 1 (14). The sleeve (13) is provided with an annular groove (132) and an air channel 2 (133), and the annular groove (132) is communicated with the air channel 2 (133). The air channel 2 (133) is communicated with the inner cavity 2 (15) located below the boss 1 (131). When the slider (12) is located at the lower extreme position, the end of the air channel 1 (121) away from the inner cavity 1 (14) is communicated with the annular groove (132).
9. A circulation method for a pure water circulation device according to any one of claims 1 to 8, characterized in that: The steps include: ① The connecting ring (82) moves upward to drive the slide plate (33) to move upward, thereby driving the sealing ball (34) to abut against the bottom of the through hole 1 (321), so that the fixed plate (32) closes the extension tube 2 (31), and the cavity above the fixed plate (32) is connected with the extension tube 1 (21) and the inner cavity 2 (15). The piston (63) moves to the left, and the air pressure in the inner cavity 1 (14) decreases. A pressure difference appears on the upper and lower sides of the slider (12), and the slider (12) moves upward, and the cooling water in the tube body 2 (2) is sucked upward into the extension tube 1 (21) and the extension tube 2 (31); ② The piston (63) moves to the right, the air pressure in the inner cavity (14) increases, the slider (12) falls back downward, the connecting ring (82) moves downward to drive the slide plate (33) to move downward, thereby driving the sealing ball (34) to separate from the bottom of the through hole (321), so that the fixed plate (32) opens the extension tube (31), the cooling water above the fixed plate (32) flows downward, and the liquid level of the tube body (2) and the extension tube (31) return to the same horizontal plane.
Citation Information
Patent Citations
Magnetic control one-way throttle valve
CN107023696A
Pump-free water circulation equipment for treating paint
CN209875399U
air pump
DE837433A
Pump equipment
TW200842242A