Air pressure balance system

Abstract

The invention discloses an air pressure balancing system which comprises a gas filtering tank, an oil storage tank, a fixing base, a first air pipe, a second air pipe, a first quick connector, a second quick connector and a third quick connector. The first quick connector, the second quick connector and the third quick connector are hollow. The first quick connector is arranged on the gas filtering tank, and the second quick connector is arranged on the oil storage tank; the fixed seat comprises a vertical pipe and an inverted buckle, a filter hopper is arranged in the vertical pipe, a vent hole penetrates through the filter hopper, and the third quick connector is arranged in the vertical pipe and is communicated with the vent hole; the first air pipe is connected with the first quick connector, the other end of the first air pipe is inserted into the frame pipe, and the two ends of the second air pipe are connected with the second quick connector and the third quick connector respectively. The frame pipe can block water vapor and dust, the gas filtering tank filters gas, the oil storage tank can collect oil liquid, the fixing base can prevent the second gas pipe from being soaked in liquid cooling oil, the filtering hopper makes the oil liquid difficult to flow out, and oil liquid leakage is prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to an air pressure balancing system. Background Art

[0002] With the popularity of electric two-wheeled vehicles, consumers' demands for the quality and life of electric vehicles are also increasing. Liquid-cooled motor technology provides a solution to the technical problems of motors in the industry. It solves the problems of high-temperature demagnetization, internal rust, and motor performance degradation after long-term use of traditional motors.

[0003] When the liquid-cooled motor is running, the internal temperature of the liquid-cooled motor increases, causing the internal pressure of the liquid-cooled motor to increase, which will squeeze the oil and cause the oil to precipitate from the gaps in the liquid-cooled motor or wiring harness, resulting in a reduction in the internal oil of the liquid-cooled motor and even harming other parts. Improvements are needed. Summary of the invention

[0004] The present invention provides a new air pressure balancing system to address the defects in the prior art that the internal pressure of a liquid-cooled motor increases, squeezing the oil and causing it to precipitate from the gaps in the liquid-cooled motor or wiring harness, resulting in a reduction in the internal oil of the liquid-cooled motor and even harming other parts.

[0005] In order to solve the above technical problems, the present invention is implemented by the following technical solutions:

[0006] A gas pressure balance system, comprising a gas filter tank, an oil storage tank, a fixing seat, a first air pipe, a second air pipe, a first quick connector, a second quick connector and a third quick connector, wherein the first quick connector, the second quick connector and the third quick connector are hollow inside; the lower end of the gas filter tank is arranged at the upper end of the oil storage tank, the gas filter tank is communicated with the oil storage tank, the first quick connector is arranged at the upper part of the gas filter tank and is communicated with the gas filter tank, the second quick connector is arranged at the lower end of the oil storage tank and is communicated with the oil storage tank; the fixing seat comprises a vertical pipe and an inverted buckle, the inverted buckle is arranged at the lower side of the vertical pipe, a filter bucket is arranged on the inner side wall of the vertical pipe, the inner diameter of the filter bucket gradually decreases downward along the height direction, a vent is penetrated at the bottom of the filter bucket, the lower end of the third quick connector is arranged in the vertical pipe, and the third quick connector is communicated with the vent; one end of the first air pipe is arranged in the first quick connector, the other end of the first air pipe is inserted into the frame pipe, and the two ends of the second air pipe are respectively arranged on the second quick connector and the third quick connector.

[0007] The other end of the first air pipe is inserted into the frame tube, so as to block water vapor and dust. When gas is inhaled into the motor, it can prevent more water vapor and dust from entering the gas filter tank through the first air pipe, and filter the inhaled gas through the gas filter tank to prevent water vapor and dust from entering the motor; when exhausting, a small amount of oil discharged from the second air pipe due to high temperature and pressure increase can be collected through the oil storage tank. When inhaling, the oil in the oil storage tank can flow back to the motor through the second air pipe again, preventing leakage of liquid cooling oil; a stator mounting hole is opened inside the motor, and the second air pipe is connected to the motor through the third quick connector and the fixing The seat and the stator mounting hole are fixed in the stator, and the fixed seat is kept above the liquid cooling oil in the stator, thereby preventing the second air pipe from being immersed in the liquid cooling oil. Because the filter bucket is wide at the top and narrow at the bottom, when exhausting, the gas in the motor can be smoothly discharged through the filter bucket, the third quick connector, and the second air pipe, while the liquid cooling oil is difficult to flow out of the filter bucket. When inhaling, the refluxed oil can smoothly pass through the filter bucket and drip into the liquid cooling oil in the motor, further reducing the outflow of oil. By adjusting the plug-in angle of the undercut and the stator mounting hole, the filter bucket can be placed in the vertical direction, further preventing the liquid cooling oil from flowing out through the filter bucket, thereby improving the performance of the motor.

[0008] Preferably, in the above-mentioned air pressure balancing system, the fixing seat also includes a base frame, the vertical pipe is arranged at the upper end of the base frame, the undercut is arranged at the side end of the base frame, and the base frame surrounds the outside of the filter bucket.

[0009] The filter bucket can be shielded by the bottom frame, which reduces the splashing of liquid cooling oil into the filter bucket when the motor is running.

[0010] Preferably, in the above-described air pressure balancing system, at least one giveway groove is provided at the end of the undercut, and the giveway groove extends inwardly along the length direction of the undercut, and the width of the giveway groove gradually decreases inwardly along the length direction of the undercut; the upper surface of the undercut is provided with an inclined surface, and the inclined surface gradually increases inwardly along the length direction of the undercut.

[0011] The give way groove facilitates pushing and gathering the undercut inward, thereby reducing the resistance encountered when the undercut is inserted into the stator mounting hole; the inclined surface further reduces the resistance encountered when the undercut is inserted into the stator mounting hole, thereby improving the smoothness of the undercut insertion into the stator mounting hole and facilitating assembly.

[0012] Preferably, in the above-described air pressure balancing system, a mounting ring is provided on the inner surface of the upper end of the gas filter tank, a plug is provided inside the mounting ring, the lower end width of the plug is smaller than the upper end width of the plug, a first annular groove is formed between the inner side wall of the mounting ring and the plug, an air intake grille is provided on the upper end of the oil storage tank, the air intake grille closes the oil storage tank, a flow hole and a second annular groove are formed at the end of the air intake grille, the flow holes are distributed on the inner side of the second annular groove, and the flow holes are connected to the oil storage tank; it also includes a copper filter element, one end of the copper filter element is inserted into the first annular groove and plug-fitted, and the other end of the copper filter element is inserted into the second annular groove and plug-fitted; a desiccant is provided in the copper filter element.

[0013] The copper filter element and desiccant can adsorb dust and water vapor and only allow gas to flow out. When the hot air is discharged to the outside, the hot air can dry the desiccant, thereby realizing the reuse of the desiccant; the plug and the air intake grille can tighten and shockproof the two ends of the copper filter element, thereby improving the convenience and stability of the copper filter element installation, and also facilitating the replacement of the copper filter element to ensure the filtering effect of the gas filter tank; the installation ring allows a gap to exist between the outer surface of the copper filter element and the inner surface of the gas filter tank, thereby enabling the inner and outer sides of the copper filter element to exchange and circulate gas to the maximum extent, thereby increasing the gas flow and timely balancing the internal pressure with the external pressure.

[0014] Preferably, in the above-described air pressure balancing system, the inner wall of the lower end of the gas filter tank is provided with an internal thread, and the outer wall of the upper end of the oil storage tank is provided with an external thread. The upper end of the oil storage tank is inserted into the lower end of the gas filter tank, and the gas filter tank and the oil storage tank are threadedly connected by the mutual cooperation of the internal thread and the external thread.

[0015] The gas filter tank and the oil storage tank are threadedly connected by the cooperation of internal threads and external threads. On the one hand, it has the advantages of simple structure and easy assembly. On the other hand, it improves the sealing performance of the connection between the gas filter tank and the oil storage tank, and further reduces the leakage of liquid cooling oil.

[0016] Preferably, in the above-described air pressure balancing system, the inner side wall of the gas filter tank is provided with a tightening groove, the internal thread is arranged in the tightening groove, the upper end width of the air intake grille is greater than the lower end width of the air intake grille, the upper surface of the air intake grille is abutted against the inner side wall of the tightening groove, and the lower surface of the upper end of the air intake grille is in contact with the upper surface of the oil storage tank; the outer side wall of the lower end of the air intake grille is provided with a first groove, the inner surface of the oil storage tank is provided with a second groove, the second groove is coaxially arranged with the oil storage tank, and the first groove and the second groove are opposite to each other and enclosed to form an embedded groove.

[0017] The upper end of the air intake grille is arranged between the tightening groove and the upper end of the oil storage tank. When the gas filter tank and the oil storage tank are tightened, the air intake grille can be pressed and fixed, thereby improving the stability of the air intake grille when it is fixed; the sealing ring can be tightly assembled at the connection between the gas filter tank and the oil storage tank through the embedded groove, thereby further improving the sealing of the connection between the gas filter tank and the oil storage tank, and preventing unfiltered gas from directly entering the oil storage tank.

[0018] Preferably, in the above-mentioned air pressure balance system, the gas filter tank and the oil storage tank are respectively provided with a first connecting column and a second connecting column with a hollow interior, and the first connecting column and the second connecting column are respectively connected to the gas filter tank and the oil storage tank; a first fixing groove is provided on the inner side wall of the first connecting column, and a first fixing ring is coaxially provided on the outside of the first quick connector, the tail end of the first quick connector is inserted into the first connecting column, and the first fixing ring is inserted into the first fixing groove and snap-fitted; the connection method between the second quick connector and the second connecting column and the connection method between the third quick connector and the vertical pipe are the same as the connection method between the first quick connector and the first connecting column.

[0019] The first quick connector is fixed to the first connecting column by plugging and fitting the first fixing ring and the first fixing groove, and has the advantages of simple structure and easy assembly; the connection method between the second quick connector and the second connecting column and the connection method between the third quick connector and the vertical pipe are the same as the connection method between the first quick connector and the first connecting column, which improves the convenience during assembly.

[0020] Preferably, in the above-mentioned air pressure balancing system, a fixing block is provided on the outer surface of the gas filter tank, and a fixing hole penetrates through the side wall of the fixing block.

[0021] The gas filter tank can be fixed on the vehicle frame through the fixing hole, which facilitates the installation of the first air pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the explosion structure of the third quick connector and the fixing seat of the present invention;

[0024] Figure 3 is a cross-sectional view of the fixing seat of the present invention;

[0025] Figure 4 This is a schematic diagram of the explosion structure of the gas filter tank, the oil storage tank, the first quick connector, and the second quick connector embodied in the present invention;

[0026] Figure 5 This is a cross-sectional view of the gas filter tank, oil storage tank, plug, air intake grille and copper filter element embodied in the present invention;

[0027] Figure 6 is a cross-sectional view of the gas filter tank of the present invention;

[0028] Figure 7 It is a cross-sectional view of the air intake grille of the present invention.

[0029] Explanation of the reference numerals: 1. gas filter tank; 11. mounting ring; 12. plug; 13. internal thread; 14. tightening groove; 15. first connecting column; 151. first fixing groove; 16. fixing block; 161. fixing hole; 2. oil storage tank; 21. air intake grille; 211. circulation hole; 212. second ring groove; 213. first groove; 22. external thread; 24. embedding groove; 25. second connecting column; 3. fixing seat; 31. vertical pipe; 32. inverted buckle; 321. clearance groove; 322. inclined surface; 33. filter bucket; 331. vent; 34. base frame; 4. first air pipe; 41. second air pipe; 5. first quick connector; 51. first fixing ring; 6. second quick connector; 7. third quick connector; 8. first ring groove; 9. copper filter element. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-7 The present invention is further described in detail with specific embodiments, but they are not limitations of the present invention:

[0031] Example 1

[0032] like Figure 1-Figure 7 As shown, a gas pressure balance system includes a gas filter tank 1, an oil storage tank 2, a fixing seat 3, a first air pipe 4, a second air pipe 41, a first quick connector 5, a second quick connector 6 and a third quick connector 7, wherein the first quick connector 5, the second quick connector 6 and the third quick connector 7 are hollow inside; the lower end of the gas filter tank 1 is arranged at the upper end of the oil storage tank 2, the gas filter tank 1 is connected with the oil storage tank 2, the first quick connector 5 is arranged at the upper part of the gas filter tank 1 and is connected with the gas filter tank 1, the second quick connector 6 is arranged at the lower end of the oil storage tank 2 and is connected with the oil storage tank 2; the fixing seat 3 includes There are a vertical tube 31 and an undercut 32, the undercut 32 is arranged on the lower side of the vertical tube 31, a filter bucket 33 is arranged on the inner wall of the vertical tube 31, the inner diameter of the filter bucket 33 gradually decreases downward along the height direction, and a vent 331 is passed through the bottom of the filter bucket 33, the lower end of the third quick connector 7 is arranged in the vertical tube 31, and the third quick connector 7 is connected to the vent 331; one end of the first air pipe 4 is arranged in the first quick connector 5, and the other end of the first air pipe 4 is inserted into the frame tube, and the two ends of the second air pipe 41 are respectively arranged on the second quick connector 6 and the third quick connector 7.

[0033] Preferably, the fixing seat 3 further includes a base frame 34 , the vertical pipe 31 is arranged at the upper end of the base frame 34 , the undercut 32 is arranged at the side end of the base frame 34 , and the base frame 34 surrounds the outside of the filter bucket 33 .

[0034] Preferably, at least one clearance groove 321 is provided at the end of the undercut 32, and the clearance groove 321 extends inwardly along the length direction of the undercut 32, and the width of the clearance groove 321 gradually decreases inwardly along the length direction of the undercut 32; the upper surface of the undercut 32 is provided with an inclined surface 322, and the inclined surface 322 gradually increases inwardly along the length direction of the undercut 32.

[0035] Preferably, a mounting ring 11 is provided on the inner surface of the upper end of the gas filter tank 1, and a plug 12 is provided inside the mounting ring 11. The lower end width of the plug 12 is smaller than the upper end width of the plug 12. A first annular groove 8 is formed between the inner side wall of the mounting ring 11 and the plug 12. An air intake grille 21 is provided on the upper end of the oil storage tank 2. The air intake grille 21 closes the oil storage tank 2. A flow hole 211 and a second annular groove 212 are provided at the end of the air intake grille 21. The flow holes 211 are distributed on the inner side of the second annular groove 212, and the flow holes 211 are connected to the oil storage tank 2. It also includes a copper filter element 9, one end of the copper filter element 9 is inserted into the first annular groove 8 and plugged in, and the other end of the copper filter element 9 is inserted into the second annular groove 212 and plugged in. A desiccant is provided in the copper filter element 9.

[0036] Preferably, the lower end inner wall of the gas filter tank 1 is provided with an internal thread 13, and the upper end outer wall of the oil storage tank 2 is provided with an external thread 22. The upper end of the oil storage tank 2 is inserted into the lower end of the gas filter tank 1, and the gas filter tank 1 and the oil storage tank 2 are threadedly connected by the mutual cooperation of the internal thread 13 and the external thread 22.

[0037] Preferably, the inner wall of the gas filter tank 1 is provided with a tightening groove 14, the internal thread 13 is arranged in the tightening groove 14, the upper end width of the air intake grille 21 is greater than the lower end width of the air intake grille 21, the upper surface of the air intake grille 21 is abutted against the inner wall of the tightening groove 14, and the lower surface of the upper end of the air intake grille 21 is in contact with the upper surface of the oil storage tank 2; the outer wall of the lower end of the air intake grille 21 is provided with a first groove 213, and the inner surface of the oil storage tank 2 is provided with a second groove 23, the second groove 23 is coaxially arranged with the oil storage tank 2, and the first groove 213 is opposite to the second groove 23 and encloses to form an embedded groove 24.

[0038] Preferably, the gas filter tank 1 and the oil storage tank 2 are respectively provided with a first connecting column 15 and a second connecting column 25 with a hollow interior, and the first connecting column 15 and the second connecting column 25 are respectively connected to the gas filter tank 1 and the oil storage tank 2; the inner side wall of the first connecting column 15 is provided with a first fixing groove 151, and the outside of the first quick connector 5 is coaxially provided with a first fixing ring 51, the tail end of the first quick connector 5 is inserted into the first connecting column 15, and the first fixing ring 51 is inserted into the first fixing groove 151 and snap-fitted; the connection method between the second quick connector 6 and the second connecting column 25, and the connection method between the third quick connector 7 and the vertical pipe 31 are the same as the connection method between the first quick connector 5 and the first connecting column 15.

[0039] Preferably, a fixing block 16 is provided on the outer surface of the gas filter tank 1 , and a fixing hole 161 penetrates through the side wall of the fixing block 16 .

[0040] Specifically, a receiving cavity is formed in the liquid-cooled motor, and liquid cooling oil is placed in the receiving cavity. A stator mounting hole for cooperating with the undercut 32 is opened on the stator, and the stator mounting hole is located above the liquid cooling oil. When the fixing base 3 needs to be fixed on the stator, it is only necessary to align the end of the undercut 32 with the stator mounting hole and insert the undercut 32 into the stator mounting hole to complete the assembly of the fixing base 3 and the stator.

[0041] There are a plurality of flow holes 211 , the second annular groove 212 is annular and the flow holes 211 are distributed inside the second annular groove 212 .

[0042] More specifically, when assembling the gas filter tank 1, the oil storage tank 2, the air intake grille 21 and the copper filter element 9, first insert the lower end of the air intake grille 21 into the oil storage tank 2 and place the upper end of the air intake grille 21 on the upper end of the oil storage tank 2, then insert the lower end of the copper filter element 9 into the second annular groove 212, then insert the upper end of the oil storage tank 2 into the lower end of the gas filter tank 1 and screw the gas filter tank 1 onto the oil storage tank 2, at this time, the upper end of the copper filter element 9 is inserted into the first annular groove 8, and the air intake grille 21 and the copper filter element 9 are pressed and fixed.

[0043] The outer surfaces of the gas filter tank 1 and the oil storage tank 2 are integrally formed with anti-skid patterns, which reduce the possibility of slipping when the gas filter tank 1 is screwed onto the oil storage tank 2, thus facilitating assembly.

[0044] like Figure 5 , Figure 7As shown, in the embodiment of the present application, a first clearance surface is integrally formed on the lower end outer wall of the plug 12 and the lower end side wall of the air intake grille 21, and the first clearance surface is gradually inclined outward upward along the height direction of the plug 12 and the air intake grille 21. A second clearance surface is provided on the inner wall of the second annular groove 212 near the flow hole 211, and the second clearance surface is gradually inclined inward upward along the height direction. The first and second clearance surfaces reduce the resistance encountered by both ends of the copper filter element 9 when inserted into the first and second annular grooves 8 and 212, thereby facilitating the assembly of the copper filter element 9. The first clearance surface also reduces the resistance encountered by the lower end of the air intake grille 21 when inserted into the oil storage tank 2, thereby facilitating the assembly of the air intake grille 21.

[0045] like Figure 2-Figure 5 As shown, the first quick connector 5 includes a head end and a tail end arranged on the lower surface of the head end, the width of the head end is greater than the width of the tail end, a flow channel is passed through the upper surface of the first quick connector 5, and the flow channel extends along the height direction of the first quick connector 5, and the second quick connector 6 and the third quick connector 7 have the same structure as the first quick connector 5. The width of the head end of the first quick connector 5, the second quick connector 6, and the third quick connector 7 is greater than the inner diameter of the first connecting column 15, the second connecting column 25 and the vertical pipe 31.

[0046] like Figure 1-Figure 7 As shown, when it is necessary to assemble the gas filter tank 1, the oil storage tank 2, the fixing seat 3, the first air pipe 4, the second air pipe 41, the first quick connector 5, the second quick connector 6 and the third quick connector 7, first insert one end of the first air pipe 4 into the first quick connector 5, then insert the tail end of the first quick connector 5 into the first connecting column 15, at this time, the first quick connector 5 is fixed by the plug-in cooperation of the first fixing ring 51 and the first fixing groove 151, and then the other end of the first air pipe 4 is inserted into the frame tube, at this time, the fixation between the first air pipe 4, the first quick connector 5 and the gas filter tank 1 is completed.

[0047] The second quick connector 6 and the third quick connector 7 are respectively fixed to the second connecting column 25 and the vertical pipe 31 in the same manner as the first quick connector 5 is assembled on the first connecting column 15. Finally, the two ends of the second air pipe 41 are respectively plugged and fixed to the second quick connector 6 and the third quick connector 7, thereby completing the assembly among the oil storage tank 2, the fixing seat 3, the second air pipe 41, the second quick connector 6 and the third quick connector 7.

[0048] In the embodiment of the present application, there are two fixing blocks 16 and the fixing blocks 16 are distributed on both sides of the gas filter tank 1. The number of fixing blocks 16 can be increased or decreased according to actual conditions. The gas filter tank 1 can be fixed to the frame tube with screws through the fixing holes 161, which facilitates the assembly of the first air pipe 4.

[0049] When the hot air is discharged to the outside, because the filter bucket 33 is set to be wide at the top and narrow at the bottom, the hot air can flow out from the filter bucket 33 and the third quick connector 7 smoothly, while the oil is difficult to flow out from the filter bucket 33; by adjusting the plug-in angle between the undercut 32 and the stator mounting hole, the filter bucket 33 can be placed in the vertical direction, further reducing the outflow of liquid cooling oil through the filter bucket 33.

[0050] When the hot gas flows into the oil storage tank 2, the hot gas can push a small amount of oil discharged from the second air pipe 41 into the oil storage tank 2 and be collected by the oil storage tank 2. When the hot gas flows into the gas filter tank 1, the desiccant can not only absorb the water vapor in the hot gas, but also the hot gas can dry the desiccant, thereby realizing the reuse of the desiccant. There is a gap between the outer surface of the copper filter element 9 and the inner wall of the gas filter tank 1, so that the inner and outer sides of the copper filter element 9 can maximize the gas exchange and circulation, thereby improving the gas flow rate and timely balancing the internal pressure of the motor with the external pressure.

[0051] When gas is sucked into the motor, since the first air pipe 4 is inserted into the frame tube, the first air pipe 4 bends and extends along the frame tube, which can block a large amount of dust and water vapor from entering the gas filter tank 1; when the gas flows into the gas filter tank 1, the dust and water vapor brought in can be adsorbed by the air intake grille 21, the copper filter element 9, and the desiccant; when the gas flows through the oil storage tank 2, the gas can push the oil stored in the oil storage tank 2 into the fixing seat 3 through the second air pipe 41, and allow the gas and oil to enter the interior of the motor through the air vent 331 together, so that the oil discharged from the motor with the hot gas can flow back to the liquid cooling oil again, thereby improving the performance of the motor.

[0052] In conclusion, the above is only a preferred embodiment of the present invention, and all equivalent changes and modifications made within the scope of the patent application of the present invention should fall within the scope of the present invention.

Claims

1. An air pressure balance system, characterized in that: The invention comprises a gas filter tank (1), an oil storage tank (2), a fixing seat (3), a first air pipe (4), a second air pipe (41), a first quick connector (5), a second quick connector (6) and a third quick connector (7); the first quick connector (5), the second quick connector (6) and the third quick connector (7) are hollow inside; the lower end of the gas filter tank (1) is arranged at the upper end of the oil storage tank (2); the gas filter tank (1) is connected to the oil storage tank (2); the first quick connector (5) is arranged at the upper part of the gas filter tank (1) and is connected to the gas filter tank (1); the second quick connector (6) is arranged at the lower end of the oil storage tank (2) and is connected to the oil storage tank (2); the fixing seat (3) comprises a vertical pipe The vertical tube (31) and the undercut (32) are arranged at the lower side of the vertical tube (31); the inner wall of the vertical tube (31) is provided with a filter hopper (33); the inner diameter of the filter hopper (33) gradually decreases downward along the height direction; the bottom of the filter hopper (33) is penetrated by a vent hole (331); the lower end of the third quick connector (7) is arranged in the vertical tube (31); the third quick connector (7) is communicated with the vent hole (331); one end of the first air pipe (4) is arranged in the first quick connector (5); the other end of the first air pipe (4) is inserted into the frame tube; the two ends of the second air pipe (41) are respectively arranged on the second quick connector (6) and the third quick connector (7).

2. An air pressure balance system according to claim 1, characterized in that: The fixing seat (3) further comprises a base frame (34), the vertical pipe (31) is arranged at the upper end of the base frame (34), the undercut (32) is arranged at the side end of the base frame (34), and the base frame (34) surrounds the outside of the filter bucket (33).

3. The air pressure balance system according to claim 1, characterized in that: At least one paving groove (321) is provided at the end of the undercut (32), the paving groove (321) extends inwardly along the length direction of the undercut (32), and the width of the paving groove (321) gradually decreases inwardly along the length direction of the undercut (32); an inclined surface (322) is provided on the upper surface of the undercut (32), and the inclined surface (322) gradually increases inwardly along the length direction of the undercut (32).

4. The air pressure balance system according to claim 1, characterized in that: The gas filter tank (1) is provided with a mounting ring (11) on the inner surface of the upper end thereof, a plug (12) is provided inside the mounting ring (11), the lower end width of the plug (12) is smaller than the upper end width of the plug (12), a first annular groove (8) is formed between the inner side wall of the mounting ring (11) and the plug (12), and the upper end of the oil storage tank (2) is provided with an air intake grille (21), the air intake grille (21) seals the oil storage tank (2), and the air intake grille (21) ) is provided with a circulation hole (211) and a second annular groove (212) at the end thereof, the circulation hole (211) being distributed inside the second annular groove (212), and the circulation hole (211) being communicated with the oil storage tank (2); and further comprising a copper filter element (9), one end of the copper filter element (9) being inserted into the first annular groove (8) and plugged in, and the other end of the copper filter element (9) being inserted into the second annular groove (212) and plugged in; and a desiccant is arranged in the copper filter element (9).

5. The air pressure balance system according to claim 4, characterized in that: The lower inner wall of the gas filter tank (1) is provided with an internal thread (13), and the upper outer wall of the oil storage tank (2) is provided with an external thread (22). The upper end of the oil storage tank (2) is inserted into the lower end of the gas filter tank (1), and the gas filter tank (1) and the oil storage tank (2) are threadedly connected by the mutual cooperation of the internal thread (13) and the external thread (22).

6. The air pressure balance system according to claim 5, characterized in that: The inner side wall of the gas filter tank (1) is provided with a pressing groove (14), the inner thread (13) is arranged in the pressing groove (14), the width of the upper end of the air intake grille (21) is greater than the width of the lower end of the air intake grille (21), the upper surface of the air intake grille (21) is pressed against the inner side wall of the pressing groove (14), and the lower surface of the upper end of the air intake grille (21) is in contact with the upper surface of the oil storage tank (2); the outer side wall of the lower end of the air intake grille (21) is provided with a first groove (213), the inner surface of the oil storage tank (2) is provided with a second groove (23), the second groove (23) is coaxially arranged with the oil storage tank (2), the first groove (213) and the second groove (23) are opposite to each other and enclose each other to form an embedded groove (24).

7. The air pressure balance system according to claim 1, characterized in that: The gas filter tank (1) and the oil storage tank (2) are respectively provided with a first connecting column (15) and a second connecting column (25) with a hollow interior, and the first connecting column (15) and the second connecting column (25) are respectively connected to the gas filter tank (1) and the oil storage tank (2); the inner side wall of the first connecting column (15) is provided with a first fixing groove (151), and the first quick connector (5) is coaxially provided with a first fixing ring (51) on the outside, the tail end of the first quick connector (5) is inserted into the first connecting column (15), and the first fixing ring (51) is inserted into the first fixing groove (151) and is snap-fitted; the connection method between the second quick connector (6) and the second connecting column (25) and the connection method between the third quick connector (7) and the vertical pipe (31) are the same as the connection method between the first quick connector (5) and the first connecting column (15).

8. The air pressure balance system according to claim 1, characterized in that: The outer surface of the gas filter tank (1) is provided with a fixing block (16), and a fixing hole (161) penetrates through the side wall of the fixing block (16).

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