Energy storage liquid-cooled battery pack high-efficiency heat dissipation device and use method thereof

Abstract

The present application relates to the technical field of new energy automobile battery, especially to a high-efficiency heat dissipation device for energy storage liquid-cooled battery pack and a use method thereof, which comprises a box body and a top cover, a placing cavity is formed in the middle part of the box body, cooling cavities and replacement cavities are formed around the outer wall of the placing cavity, a cooling assembly is arranged in the cooling cavity, a conveying pipe is arranged at the lower end of the cooling assembly, a collecting assembly is arranged at the upper end of the cooling assembly, a replacement assembly is arranged in the replacement cavity, a driving assembly and a heat dissipation assembly are arranged at the right end of the box body, the replacement assembly is driven by the driving assembly to send cooling water into the conveying pipe, the cooling water is sent into the cooling assembly through the conveying pipe, the cooling water is sent back into the replacement assembly through the collecting assembly, and the cooling assembly and the replacement assembly are cooled by the heat dissipation assembly driven by the driving assembly; the problem that the heat dissipation effect of the existing heat dissipation device through the air cooling assembly is poor, and the water cooling assembly only cools the bottom of the battery pack and has poor heat dissipation effect on the periphery is solved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of new energy automobile battery, in particular to an efficient heat dissipation device for an energy storage liquid-cooled battery pack and a use method thereof. BACKGROUND

[0002] The battery pack is the power source of the new energy automobile, and the working state directly affects the reliability, safety and service life of the whole vehicle. A Chinese patent with the application publication number CN112259828B discloses a new energy automobile battery pack heat dissipation device, which comprises a box body, a box cover, a dust filter screen, a baffle, a battery pack assembly, an air cooling assembly and a water cooling assembly. The device solves the problems of poor heat dissipation efficiency and effect and high heat dissipation cost of the existing new energy automobile battery pack heat dissipation device, and brings inconvenience to people. A Chinese patent with the application publication number CN108172928B discloses a battery pack heat dissipation structure, which comprises a base, a battery cell module, a fixing assembly and a data acquisition and wireless transmission module. The heat generated by the battery cell module and the data acquisition and wireless transmission module can be stably transmitted to the base for centralized and rapid cooling, thereby effectively preventing the battery cell module and the data acquisition and wireless transmission module from overheating.

[0003] However, the application finds that the heat dissipation effect of the heat dissipation device through the air cooling assembly is poor, and the water cooling assembly only dissipates heat at the bottom of the battery pack, and the heat dissipation effect on the periphery is poor. SUMMARY

[0004] The application aims at the deficiencies of the prior art, and solves the problems of poor heat dissipation effect of the existing heat dissipation device through the air cooling assembly, and poor heat dissipation effect of the water cooling assembly on the periphery of the battery pack by means of the following technical solutions: a cooling cavity is arranged around the outer wall of the placing cavity, a cooling assembly is arranged in the cooling cavity, the cooling water is sent into the conveying pipe by the displacement assembly driven by the driving assembly, the cooling water is sent into the cooling assembly through the conveying pipe, the cooling water is conveyed back to the displacement assembly through the collecting assembly, and the heat dissipation assembly is driven by the driving assembly to dissipate heat inside the cooling assembly and the displacement assembly.

[0005] In view of the above technical problems, the technical solutions adopted by the application are as follows:

[0006] The utility model provides a kind of energy storage liquid cooling battery pack high-efficiency heat dissipation device, including box and the top cover being arranged on the upper end of box, the middle part of the box is equipped with placing cavity, the outer wall of the placing cavity is equipped with cooling cavity around, the lower end of the placing cavity is equipped with replacement cavity, cooling assembly is arranged in the cooling cavity, the lower end of the cooling assembly is equipped with delivery pipe, the upper end of the cooling assembly is equipped with collection assembly, replacement assembly is arranged in the replacement cavity, the right end of the box is equipped with driving assembly and heat dissipation assembly, replacement assembly is driven by driving assembly and sends cooling water into delivery pipe, cooling water is sent into cooling assembly by delivery pipe, cooling water is sent back into replacement assembly by collection assembly, while driving assembly drives heat dissipation assembly to carry out heat dissipation to the inside of cooling assembly and replacement assembly.

[0007] As a kind of preferred, the cooling assembly includes the cooling pipe a, cooling pipe b, cooling pipe c and cooling pipe d being arranged in cooling cavity, the cooling pipe is all attached to the outer wall of cooling cavity, and the cooling pipe is all set as s-shaped pipe.

[0008] As a kind of preferred, the collection assembly includes collection pipe being arranged in the upper end of cooling assembly and heat dissipation pipe being arranged in the right end of cooling cavity, and the heat dissipation pipe is set as s-shaped pipe.

[0009] As a kind of preferred, the replacement assembly includes replacement cylinder being arranged in replacement cavity and auger being rotationally arranged in replacement cylinder, the left end of the replacement cylinder is equipped with liquid outlet pipe, which is connected with delivery pipe, the right end of the replacement cylinder is equipped with liquid inlet pipe, which is connected with heat dissipation pipe, and the right end of the replacement cylinder is equipped with water inlet pipe.

[0010] As a kind of preferred, the auger is equipped with cooling groove in it, and the right end of the auger is equipped with several air inlet holes.

[0011] As a kind of preferred, the heat dissipation assembly includes several fans being rotationally arranged in the right end of box and several belts a being arranged between fans, the rear end of the fan is equipped with several pulleys a, the fan at the right end of driving assembly is equipped with fan cover, and the left end of the fan cover is equipped with air inlet pipe.

[0012] As a kind of preferred, the driving assembly includes driving part being arranged in the right end of box and shaft being rotationally driven by driving part, the shaft is equipped with several pulleys b, the driving part and left and right fans are equipped with belt b, and the driving part is connected with auger.

[0013] As another kind of preferred, the left end of the box is equipped with several heat dissipation holes, the right end of the box is equipped with several heat dissipation grooves for fixing fan, the right end of the replacement cavity is equipped with rotation sleeve, the right end of the auger is rotationally arranged in the middle part of rotation sleeve, the rotation sleeve is equipped with gas conveying channel, and the gas conveying channel is connected with air inlet pipe.

[0014] The application also provides a use method of the energy storage liquid-cooled battery pack high-efficiency heat dissipation device.

[0015] a. The feeding process is to inject cooling water into the displacement cylinder through the water inlet pipe, start the driving member, and drive the auger to rotate to transport the cooling water to the left end of the displacement cylinder;

[0016] b. The liquid delivery and cooling process is to deliver the cooling water into the liquid outlet pipe through the auger, deliver the cooling water into the delivery pipe through the liquid outlet pipe, deliver the cooling water into the cooling pipe a, the cooling pipe b, the cooling pipe c and the cooling pipe d through the delivery pipe, and cool the surrounding of the placement cavity through the cooling pipe a, the cooling pipe b, the cooling pipe c and the cooling pipe d;

[0017] c. The backflow collection process is to deliver the heated cooling water into the collection pipe through the cooling pipe a, the cooling pipe b, the cooling pipe c and the cooling pipe d, deliver the heated cooling water into the heat dissipation pipe through the collection pipe for cooling, deliver the cooled cooling water into the liquid inlet pipe through the heat dissipation pipe, and deliver the cooling water into the displacement cylinder through the liquid inlet pipe;

[0018] d. The heat dissipation process is to drive the shaft to rotate through the driving member, drive the belt b on the shaft to rotate through the belt wheel b, drive the fans on the left and right sides of the driving member to rotate through the belt b, blow cold air into the fan cover through the right fan, deliver the cold air into the air delivery channel through the air inlet pipe, and deliver the cold air into the cooling tank through the air inlet hole for secondary cooling of the cooling water, and cool and dissipate heat of the displacement cavity through the left fan, drive the belt a to rotate through the fans on the left and right sides of the driving member, drive a plurality of fans to rotate through the belt a to cool and dissipate heat of the cooling cavity.

[0019] The application has the following advantages:

[0020] 1. The cooling cavity is arranged around the outer wall of the placement cavity, the cooling assembly is arranged in the cooling cavity, the cooling water is delivered into the delivery pipe through the driving assembly and the displacement assembly, the cooling water is delivered into the cooling assembly through the delivery pipe, the cooling water is delivered back into the displacement assembly through the collection assembly, and the cooling assembly and the displacement assembly are cooled and dissipated through the driving assembly and the heat dissipation assembly, so that the heat dissipation effect is improved.

[0021] 2. The fan is driven to rotate through the driving assembly, the cold air is blown into the fan cover through the fan, the cold air is delivered into the air delivery channel through the air inlet pipe, and the cooling water is secondary cooled in the cooling tank through the air inlet hole, so that the cooling water can form a water circulation in the displacement cylinder, the cooling assembly, the delivery pipe and the collection assembly, which is beneficial to reduce the heat dissipation cost and save water resources.

[0022] In conclusion, the device has the advantages of improving heat dissipation effect, reducing heat dissipation cost, saving water resources, etc., and is especially suitable for the new energy automobile battery technical field. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced as follows. Obviously, the drawings described below are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0024] Figure 1 It is a structure schematic diagram of the high-efficiency heat dissipation device for the liquid-cooled battery pack.

[0025] Figure 2 It is a sectional view schematic diagram of the high-efficiency heat dissipation device for the liquid-cooled battery pack.

[0026] Figure 3 It is a structure schematic diagram of the cooling assembly and the collecting assembly.

[0027] Figure 4 It is a structure schematic diagram of the driving assembly and the heat dissipation assembly.

[0028] Figure 5 It is a structure schematic diagram of the replacement assembly and the driving assembly.

[0029] Figure 6 It is a sectional view schematic diagram of the auger and the rotating sleeve.

[0030] Figure 7 It is a process flow chart of the high-efficiency heat dissipation device for the liquid-cooled battery pack.

[0031] 1. box body; 2. top cover; 3. cooling assembly; 4. conveying pipe; 5. collecting assembly; 6. replacement assembly; 7. driving assembly; 8. heat dissipation assembly; 9. rotating sleeve; 11. placing cavity; 12. cooling cavity; 13. replacement cavity; 14. heat dissipation hole; 15. heat dissipation groove; 31. cooling pipe a; 32. cooling pipe b; 33. cooling pipe c; 34. cooling pipe d; 51. collecting pipe; 52. heat dissipation pipe; 61. replacement cylinder; 62. auger; 71. driving piece; 72. rotating shaft; 73. belt pulley b; 74. belt b; 81. fan; 82. belt a; 83. fan cover; 84. air inlet pipe; 91. air conveying channel; 611. liquid outlet pipe; 612. liquid inlet pipe; 613. water inlet pipe; 621. cooling groove; 622. air inlet hole; 811. belt pulley a. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings.

[0033] Embodiment one

[0034] As Figures 1 to 7 shown, a high-efficiency heat dissipation device for an energy storage liquid-cooled battery pack includes a box 1 and a top cover 2 arranged at the upper end of the box 1, the middle part of the box 1 is provided with a placement cavity 11, the outer wall of the placement cavity 11 is provided with a cooling cavity 12, the lower end of the placement cavity 11 is provided with a replacement cavity 13, the cooling cavity 12 is provided with a cooling assembly 3, the lower end of the cooling assembly 3 is provided with a conveying pipe 4, the upper end of the cooling assembly 3 is provided with a collection assembly 5, the replacement cavity 13 is provided with a replacement assembly 6, the right end of the box 1 is provided with a driving assembly 7 and a heat dissipation assembly 8, the replacement assembly 6 is driven by the driving assembly 7 to send cooling water into the conveying pipe 4, the cooling water is sent into the cooling assembly 3 through the conveying pipe 4, the cooling water is conveyed back into the replacement assembly 6 through the collection assembly 5, and the inside of the cooling assembly 3 and the replacement assembly 6 is cooled by the heat dissipation assembly 8 driven by the driving assembly 7.

[0035] It is worth mentioning here that by arranging the cooling cavity 12 around the outer wall of the placement cavity 11 and the cooling assembly 3 in the cooling cavity 12, the cooling water is sent into the conveying pipe 4 by the replacement assembly 6 driven by the driving assembly 7, the cooling water is sent into the cooling assembly 3 through the conveying pipe 4, the cooling water is conveyed back into the replacement assembly 6 through the collection assembly 5, and the inside of the cooling assembly 3 and the replacement assembly 6 is cooled by the heat dissipation assembly 8 driven by the driving assembly 7, which improves the heat dissipation effect.

[0036] As Figure 3 shown, the cooling assembly 3 includes cooling pipes a31, b32, c33 and d34 arranged in the cooling cavity 12, the cooling pipes are arranged on the outer wall of the cooling cavity 12, and the cooling pipes are all arranged as s-shaped pipes.

[0037] In this example, the cooling pipes are all arranged as s-shaped pipes to improve the cooling effect of the cooling pipes on the battery pack.

[0038] As Figure 3 shown, the collection assembly 5 includes a collection pipe 51 arranged at the upper end of the cooling assembly 3 and a heat dissipation pipe 52 arranged at the right end of the cooling cavity 12, and the heat dissipation pipe 52 is arranged as an s-shaped pipe.

[0039] In this example, the heat dissipation pipe 52 is arranged as an s-shaped pipe to improve the heat dissipation effect of the cooling water and increase the time length of the fan 81 for cooling the cooling water.

[0040] As Figure 5As shown, the displacement assembly 6 includes a displacement cylinder 61 arranged in the displacement cavity 13, and an auger 62 rotatably arranged in the displacement cylinder 61. The left end of the displacement cylinder 61 is provided with a liquid outlet pipe 611 connected with the conveying pipe 4. The right end of the displacement cylinder 61 is provided with a liquid inlet pipe 612 connected with the heat dissipation pipe 52. The right end of the displacement cylinder 61 is provided with a water inlet pipe 613.

[0041] In this example, the auger 62 drives the cooling water to enter the conveying pipe 4 from the liquid outlet pipe 611, and the cooling water in the heat dissipation pipe 52 is sent back to the displacement cylinder 61 through the liquid inlet pipe 612.

[0042] As shown in the figure, Figure 6 The auger 62 is provided with a cooling groove 621, and the right end of the auger 62 is provided with a plurality of air inlet holes 622.

[0043] In this example, the cooling water in the displacement cylinder 61 is subjected to secondary cooling by blowing cold air into the cooling groove 621.

[0044] As shown in the figure, Figure 4 , Figure 5 The heat dissipation assembly 8 includes a plurality of fans 81 rotatably arranged at the right end of the box body 1, and a plurality of belts a 82 arranged between the fans 81. The rear end of each fan 81 is provided with a plurality of belt pulleys a 811. The fan 81 at the right end of the driving assembly 7 is provided with a fan cover 83, and the left end of the fan cover 83 is provided with an air inlet pipe 84.

[0045] As shown in the figure, Figure 4 , Figure 5 The driving assembly 7 includes a driving member 71 arranged at the right end of the box body 1, and a rotating shaft 72 driven by the driving member 71. The rotating shaft 72 is provided with a plurality of belt pulleys b 73. The driving member 71 and the left and right fans 81 are provided with a belt b 74. The driving member 71 is connected with the auger 62.

[0046] As shown in the figure, Figure 2 , Figure 6 The left end of the box body 1 is provided with a plurality of heat dissipation holes 14. The right end of the box body 1 is provided with a plurality of heat dissipation grooves 15 for fixing the fans 81. The right end of the displacement cavity 13 is provided with a rotating sleeve 9. The right end of the auger 62 is rotatably arranged in the middle part of the rotating sleeve 9. The rotating sleeve 9 is provided with a gas conveying passage 91. The gas conveying passage 91 is connected with the air inlet pipe 84.

[0047] Example two

[0048] A use method of the energy storage liquid-cooled battery pack high-efficiency heat dissipation device, using an energy storage liquid-cooled battery pack high-efficiency heat dissipation device, comprising the following steps:

[0049] a. The feeding process is to inject cooling water into the displacement cylinder 61 through the water inlet pipe 613, start the driving part 71, and rotate the auger 62 to deliver the cooling water to the left end of the displacement cylinder 61 through the driving part 71;

[0050] b. The infusion cooling process is to send the cooling water to the liquid outlet pipe 611 through the auger 62, to the delivery pipe 4 through the liquid outlet pipe 611, to the cooling pipes a31, b32, c33 and d34 through the delivery pipe 4, and to cool the surrounding of the placement cavity 11 through the cooling pipes a31, b32, c33 and d34;

[0051] c. The reflux collection process is to send the heated cooling water to the collection pipe 51 through the cooling pipes a31, b32, c33 and d34, to the heat dissipation pipe 52 through the collection pipe 51 for cooling, to the liquid inlet pipe 612 through the heat dissipation pipe 52, and to the displacement cylinder 61 through the liquid inlet pipe 612;

[0052] d. The heat dissipation process is to rotate the shaft 72 through the driving part 71, rotate the belt b74 through the belt pulley b73 on the shaft 72, rotate the fans 81 on the left and right sides of the driving part 71 through the belt b74, blow cold air into the fan cover 83 through the right fan 81, send the cold air to the air inlet channel 91 through the air inlet pipe 84, enter the cooling tank 621 through the air inlet hole 622 for secondary cooling of the cooling water, and cool the cooling cavity 12 through the left fan 81.

[0053] It is worth mentioning that the driving assembly 7 drives the fan 81 to rotate, the fan 81 blows cold air into the fan cover 83, the air inlet pipe 84 sends the cold air to the air inlet channel 91, and the air inlet hole 622 enters the cooling tank 621 for secondary cooling of the cooling water, so that the cooling water can form a water circulation in the displacement cylinder 61, the cooling assembly 3, the delivery pipe 4 and the collection assembly 5, which is beneficial to reduce the heat dissipation cost and save water resources.

[0054] The working process is as follows:

[0055] The cooling water is injected into the displacement cylinder 61 through the water inlet pipe 613, the driving part 71 is started, and the cooling water is delivered to the left end of the displacement cylinder 61 through the driving part 71;

[0056] The cooling water is sent into the outlet pipe 611 by the screw 62, sent into the conveying pipe 4 by the outlet pipe 611, sent into the cooling pipes a31, b32, c33 and d34 by the conveying pipe 4, and the cooling pipes a31, b32, c33 and d34 are used to cool the periphery of the placing cavity 11;

[0057] The heated cooling water is sent into the collecting pipe 51 by the cooling pipes a31, b32, c33 and d34, cooled in the heat dissipation pipe 52 by the collecting pipe 51, sent into the inlet pipe 612 by the heat dissipation pipe 52, and sent into the replacement cylinder 61 by the inlet pipe 612;

[0058] The rotation shaft 72 is driven to rotate by the driving member 71, the belt b74 is driven to rotate by the belt pulley b73 on the rotation shaft 72, the fans 81 on the left and right sides of the driving member 71 are driven to rotate by the belt b74, the cool air is blown into the fan cover 83 by the fan 81 on the right side, the cool air is sent into the gas conveying channel 91 by the air inlet pipe 84, the secondary cooling of the cooling water is realized by the air inlet hole 622 into the cooling groove 621, the air cooling and heat dissipation of the replacement cavity 13 is realized by the fan 81 on the left side, the air cooling and heat dissipation of the cooling cavity 12 is realized by the rotation of the fans 81 driven by the belt a82 on the left and right sides of the driving member 71.

[0059] The above is only the preferred embodiment of the present application, but the protection scope of the present application is not limited to this, any change or replacement that can be easily thought by the person skilled in the art under the technical hint of the present application should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be the protection scope of the claims.

Claims

1. An energy storage liquid-cooled battery pack high-efficiency heat dissipation device, comprising a box (1) and a top cover (2) arranged at the upper end of the box (1), characterized in that: The middle part of the box (1) is provided with a placing cavity (11), the outer wall of the placing cavity (11) is provided with a cooling cavity (12), the lower end of the placing cavity (11) is provided with a replacement cavity (13), the cooling cavity (12) is provided with a cooling assembly (3), the lower end of the cooling assembly (3) is provided with a conveying pipe (4), the upper end of the cooling assembly (3) is provided with a collecting assembly (5), the replacement cavity (13) is provided with a replacement assembly (6), the replacement assembly (6) comprises a replacement cylinder (61) arranged in the replacement cavity (13) and an auger (62) rotatably arranged in the replacement cylinder (61), the left end of the replacement cylinder (61) is provided with a liquid outlet pipe (611) connected with the conveying pipe (4), the right end of the replacement cylinder (61) is provided with a liquid inlet pipe (612) connected with the heat dissipation pipe (52), the right end of the replacement cylinder (61) is provided with a water inlet pipe (613), the auger (62) is provided with a cooling groove (621), and the right end of the auger (62) is provided with a plurality of air inlet holes (622); the right end of the box (1) is provided with a driving assembly (7) and a heat dissipation assembly (8), the heat dissipation assembly (8) comprises a plurality of fans (81) rotatably arranged at the right end of the box (1) and a plurality of belts a (82) arranged between the fans (81), the rear end of each fan (81) is provided with a plurality of belt pulleys a (811), the fan (81) at the right end of the driving assembly (7) is provided with a fan cover (83), the left end of the fan cover (83) is provided with an air inlet pipe (84), the left end of the box (1) is provided with a plurality of heat dissipation holes (14), the right end of the box (1) is provided with a plurality of heat dissipation grooves (15) for fixing the fans (81), the right end of the replacement cavity (13) is provided with a rotating sleeve (9), the right end of the auger (62) is rotatably arranged in the middle part of the rotating sleeve (9), the rotating sleeve (9) is provided with a gas conveying channel (91), and the gas conveying channel (91) is connected with the air inlet pipe (84); the driving assembly (7) drives the replacement assembly (6) to send cooling water into the conveying pipe (4), the cooling water is sent into the cooling assembly (3) through the conveying pipe (4), the cooling water is conveyed back into the replacement assembly (6) through the collecting assembly (5), and the driving assembly (7) drives the heat dissipation assembly (8) to dissipate heat inside the cooling assembly (3) and the replacement assembly (6).

2. The high-efficiency heat dissipation device for an energy storage liquid-cooled battery pack according to claim 1, characterized in that, The cooling assembly (3) comprises cooling pipes a (31), cooling pipes b (32), cooling pipes c (33) and cooling pipes d (34) arranged in the cooling cavity (12), and the cooling pipes are arranged on the outer wall of the cooling cavity (12).

3. The high-efficiency heat dissipation device for an energy storage liquid-cooled battery pack according to claim 1, characterized in that, The collecting assembly (5) comprises a collecting pipe (51) arranged at the upper end of the cooling assembly (3) and a heat dissipation pipe (52) arranged at the right end of the cooling cavity (12), and the heat dissipation pipe (52) is arranged as an s-shaped pipe. The collecting assembly (5) comprises a collecting pipe (51) arranged at the upper end of the cooling assembly (3) and a heat dissipation pipe (52) arranged at the right end of the cooling cavity (12), and the heat dissipation pipe (52) is arranged as an s-shaped pipe.

4. The high-efficiency heat dissipation device for an energy storage liquid-cooled battery pack according to claim 1, characterized in that, The driving assembly (7) comprises a driving piece (71) arranged at the right end of the box body (1) and a rotating shaft (72) driven by the driving piece (71), a plurality of belt pulleys b (73) are arranged on the rotating shaft (72), a belt b (74) is arranged between the driving piece (71) and the left and right fans (81), and the driving piece (71) is connected with the auger (62).

5. A method for using the high-efficiency heat dissipation device for liquid-cooled battery pack, the method comprises the following steps: a. The cooling water is injected into the displacement cylinder (61) through the water inlet pipe (613), the driving piece (71) is started, and the cooling water is transported to the left end of the displacement cylinder (61) by rotating the auger (62) driven by the driving piece (71); b. The cooling water is sent to the liquid outlet pipe (611) through the auger (62), the cooling water is sent to the delivery pipe (4) through the liquid outlet pipe (611), the cooling water is sent to the cooling pipe a (31), the cooling pipe b (32), the cooling pipe c (33) and the cooling pipe d (34) through the delivery pipe (4), and the surrounding of the placement cavity (11) is cooled through the cooling pipe a (31), the cooling pipe b (32), the cooling pipe c (33) and the cooling pipe d (34); c. The heated cooling water is sent to the collection pipe (51) through the cooling pipe a (31), the cooling pipe b (32), the cooling pipe c (33) and the cooling pipe d (34), the heated cooling water is sent to the heat dissipation pipe (52) through the collection pipe (51) for cooling, the cooled cooling water is sent to the liquid inlet pipe (612) through the heat dissipation pipe (52), and the cooling water is sent to the displacement cylinder (61) through the liquid inlet pipe (612); d. The driving piece (71) drives the rotating shaft (72) to rotate, the belt b (74) is driven to rotate by the belt pulley b (73) on the rotating shaft (72), the fans (81) on the left and right sides of the driving piece (71) are driven to rotate by the belt b (74), the cold air is blown into the fan cover (83) by the right fan (81), the cold air is sent to the gas inlet channel (91) through the air inlet pipe (84), the cooling water is secondarily cooled in the cooling tank (621) through the air inlet hole (622), the displacement cavity (13) is air-cooled and heat-dissipated by the left fan (81), the belt a (82) is driven to rotate by the fans (81) on the left and right sides of the driving piece (71), and the cooling cavity (12) is air-cooled and heat-dissipated by the rotating fans (81).

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