Liquid-cooled air compressor

Abstract

The application discloses a liquid-cooled air compressor which comprises a compressor structure fixedly installed on a liquid-cooled structure, wherein the compressor structure comprises a motor shell with a hollow structure, a stator winding fixedly connected in the motor shell, a rotor rotating in the stator winding, bearing plates with sealed bearings fixedly connected to both ends of the motor shell through fixing screws, and conveying holes for conveniently conveying and circulating cooling liquid on the surface of the motor shell and on the lower side of one side of the motor shell. The bearing plates are fixedly connected to a movable box with a hollow structure through sealing pads and fixing nuts, the surface of the movable box is provided with connecting holes on the upper side and on both sides, and the upper side of the surface of the movable box is provided with an extension hole for conveniently extending one end of the fixing screw in the movable box. The liquid-cooled air compressor is provided with the bearing plates which form mounting sealing structures on both ends of the motor shell.

Description

Technical Field

[0001] The invention relates to the field of air compressor technology, and in particular to a liquid-cooled air compressor. Background Technology

[0002] Air compressors are widely used in scenarios requiring a continuous and reliable source of compressed air due to their relatively simple and reliable structure and ability to provide stable medium-pressure gas. For example, they provide power to pneumatic tools in factory workshops, drive cylinders, pneumatic valves and pneumatic motors in automated equipment in production lines, and are installed on engineering vehicles as on-board air sources to provide compressed air for the vehicle's own pneumatic braking system, suspension system or other accessories. The main heat dissipation methods for reciprocating air compressors are air cooling and liquid cooling. Air cooling relies on air convection, and its heat dissipation capacity drops sharply when the ambient temperature is high, resulting in low heat dissipation efficiency. Moreover, to increase heat dissipation, the radiator is bulky, making it difficult to deploy in small spaces and limiting its environmental adaptability. If cooling is done by a fan, there is also the disadvantage of high noise pollution. Liquid cooling has better heat dissipation efficiency and noise levels than air cooling, but existing liquid cooling systems have a more complex structure, leading to more potential failure points and a higher failure rate. Furthermore, the cooling efficiency between different parts of the air compressor is uneven, easily causing two major problems: inadequate local cooling and easy scale buildup on the cooler, leading to high temperatures in the air compressor. At the same time, existing air compressors are all driven by motors, which also generate a lot of heat during operation. Generally, heat dissipation is handled by a cooling fan at the rear of the motor, which not only has low heat dissipation efficiency but also allows external dust to enter the rear of the motor. Summary of the Invention

[0003] To improve the heat dissipation of the aforementioned reciprocating air compressors, the main methods are air cooling or liquid cooling. Air cooling relies on air convection, and its heat dissipation capacity drops sharply when the ambient temperature is high, resulting in low heat dissipation efficiency. Moreover, to increase heat dissipation, the radiator is bulky, making it difficult to deploy in small spaces and limiting its environmental adaptability. If cooling is done by a fan, there is also the disadvantage of high noise pollution. Liquid cooling has better heat dissipation efficiency and noise levels than air cooling, but existing liquid cooling systems have a more complex structure, leading to more potential failure points and a higher failure rate. Furthermore, the cooling efficiency between different parts of the air compressor is uneven, easily resulting in two major problems: inadequate local cooling and easy scale buildup on the cooler, causing the air compressor to overheat. At the same time, existing air compressors are all driven by motors, which also generate a lot of heat during operation. Generally, heat dissipation is handled by a cooling fan at the rear of the motor, which not only has low heat dissipation efficiency but also allows external dust to enter the rear of the motor.

[0004] The invention provides a liquid-cooled air compressor, which adopts the following technical solution:

[0005] A liquid-cooled air compressor includes a compressor structure, wherein the compressor structure is fixedly mounted on a liquid-cooled structure;

[0006] The compressor structure includes a hollow motor housing with a stator winding fixedly connected inside. A rotor rotating in the stator winding is disposed inside the motor housing. Both ends of the motor housing are fixedly connected to bearing plates with sealed bearings by fixing screws. The motor housing has through holes on the top and one side of its surface to facilitate the circulation of cooling liquid.

[0007] The above technical solution forms a sealing structure at both ends of the motor housing by setting the bearing plate. This avoids the installation gap between the motor housing and the bearing plate, which would cause the coolant to flow to the outside through the gap.

[0008] Optionally, the bearing plate is fixedly connected to the movable box with a hollow internal structure by a sealing gasket and a fixing nut. The movable box has a through hole on the top and both sides. The movable box has an extension hole on the top of the movable box to facilitate the fixing of one end of the screw extending into the movable box. The movable box has a crank that extends out of the movable box. One end of the crank is connected to the piston by a piston pin.

[0009] The above technical solution not only facilitates the quick installation or disassembly of the motor housing and crankcase, but also facilitates the later maintenance and replacement of the piston. At the same time, it facilitates the gradual delivery of lubricating oil through the movable box into the crankcase to lubricate and cool the internal components.

[0010] Optionally, an eccentric hole is provided at the other end of the crank, and an eccentric bearing is installed inside the eccentric hole. The eccentric bearing is connected to one end of the rotor. The two sides of the movable housing are also fixedly connected to the crankcase by fixing nuts. An adjustable piston is provided inside the crankcase. An installation tube is embedded and fixedly connected to one side and the rear end of the crankcase, and an intake pipe and an exhaust pipe are respectively threaded onto the installation tube.

[0011] The above technical solution facilitates the installation and connection between the installation pipe and the intake and exhaust pipes, and the installation pipe is equipped with a one-way control valve to control the inlet and outlet gas in one direction.

[0012] Optionally, the bottom of the aforementioned movable housing and crankcase is inlaid with a first liquid outlet pipe for convenient lubricating oil discharge, and an oil inlet hole is provided on the top of the movable housing for convenient fixed connection with the pipe sleeve. The delivery hole is fixedly connected to one end of the first liquid inlet pipe and the liquid outlet pipe respectively, and the other end of the first liquid inlet pipe is installed and connected to one end of the first liquid pump.

[0013] With the above technical solution, the oil inlet hole facilitates the entry of lubricating oil into the moving housing. The lubricating oil that enters the moving housing then gradually enters the crankcase to lubricate the components inside the moving housing and crankcase, and carries away metal debris as it flows out of the moving housing and crankcase.

[0014] Optionally, the above-mentioned liquid cooling structure includes a base body with a compressor structure fixedly connected, and a through hole is opened on the surface of the base body to facilitate the extension of the first liquid outlet pipe. A first cooling box is fixedly connected to one side of the upper part of the base body, and a coolant storage tank is fixedly connected to the other side of the upper part of the base body. A collection frame for collecting spray water is fixedly connected to one side of the coolant storage tank, and a plate cooler is fixedly connected inside the collection frame. Suction-type variable frequency cooling fans are fixedly connected to both sides of the collection frame, and a spray box with a hollow internal structure is fixedly connected above the surface of the suction-type variable frequency cooling fan. Spray holes for spraying and cooling the surface of the plate cooler are opened through the bottom of the spray box.

[0015] Through the above technical solution, the spray water can be collected and recycled by the set collection frame, and the waste of spray water can be avoided. At the same time, the suction-type variable frequency cooling fan fixedly connected to both sides of the collection frame can simultaneously perform air cooling and water cooling on both sides of the plate cooler.

[0016] Optionally, a water tank with an internal water level sensing module is fixedly connected to one side of the collection frame, and a second liquid pump is installed above the surface of the water tank. A second liquid outlet pipe is installed above the second liquid pump and is fixedly connected to one side of the plate cooler. The other end of the plate cooler is installed and connected to one end of a third liquid pump, and the other end of the third liquid pump is installed and connected to the third liquid outlet pipe. The other end of the third liquid outlet pipe is embedded and connected to the surface of the spray box.

[0017] The above technical solution uses a plate cooler to circulate and cool the coolant. A temperature detection module is installed at the outlet of the plate cooler. By using the temperature detection module, the controller can control the rotation speed of the intake variable frequency cooling fan and the amount of lubricating oil delivered to change the temperature at the outlet of the plate cooler, thereby effectively reducing the temperature of the air compressor host.

[0018] Optionally, the lower end of the plate cooler is connected to the coolant storage tank via a second inlet pipe and a fourth pump, and the lower end of the plate cooler is connected to the upper end of the shell-and-tube heat exchanger via a fourth outlet pipe and a fifth pump. The upper end of the shell-and-tube heat exchanger is connected to the coolant storage tank via a fifth outlet pipe and a sixth pump.

[0019] The above technical solution facilitates heat exchange between the coolant and the lubricating oil through the shell-and-tube heat exchanger. The shell-and-tube heat exchanger is equipped with lubricating oil that can be extracted from the crankcase and crankcase, and the lubricating oil can be used to achieve cooling and lubrication effects.

[0020] Optionally, the second liquid pump has a through-hole reflux pipe with an internal one-way control valve embedded in its suction end, and the reflux pipe is connected to the upper surface of the filter box, which has a hollow internal structure. The filter box has reflux holes through-holes on both sides, and a matching through-groove is through-hole on the upper surface of the filter box. A hollow frame with reflux holes is connected inside the matching through-groove, and an activated carbon filter element for filtering the spray water is installed inside the hollow frame.

[0021] The above technical solution allows for the filtration of spray water through a filter box. Filtration not only improves the efficiency of spray water usage but also facilitates the cleaning of the plate cooler surface by carrying away dust. Furthermore, the filtered spray water prevents blockage and damage to the liquid pump.

[0022] Optionally, one end of the shell-and-tube heat exchanger is connected to the tube sleeve via a seventh liquid pump and a sixth liquid outlet pipe, and the other end of the shell-and-tube heat exchanger is equipped with a third liquid inlet pipe. The third liquid inlet pipe extends through the base body and below the base body. One end of the third liquid inlet pipe is embedded and connected to one end of the hollow tube via an eighth liquid pump. The hollow tube is embedded and connected to the first liquid outlet pipe. A T-shaped block is connected to one end of the hollow tube, and a magnetic rod extending inside the hollow tube is fixedly connected to one end of the T-shaped block.

[0023] The above technical solution allows the magnetic rod to be used to attract and process the lubricating oil along with the iron filings. When the iron filings carried by the lubricating oil are attracted, the lubricating oil is prevented from being transported into the shell-and-tube heat exchanger and causing blockage in the internal pipes.

[0024] In summary, the invention includes at least one of the following beneficial effects: by controlling the operation of the fourth liquid pump, coolant is drawn from the coolant storage tank and transported to the plate cooler for heat exchange. After cooling by the plate cooler, the coolant is sent to the shell-and-tube heat exchanger, where it exchanges heat with the air compressor lubricating oil. The lubricating oil (cold) after heat exchange enters the moving housing and crankcase to lubricate and cool the components, thereby cooling the air compressor. If it is a dry oil-free air compressor, centrifugal air compressor, or suspended air compressor, the coolant also directly enters the oil-free air compressor main unit, and the coolant directly cools the oil-free air compressor main unit.

[0025] After heat exchange, the coolant flows back to the coolant storage tank. When the temperature sensor installed at the outlet of the plate cooler detects that the outlet temperature is too low (below the set minimum temperature), the system issues a command: on the one hand, to reduce the speed of the intake variable frequency cooling fan, and on the other hand, to reduce the flow rate of lubricating oil by the liquid pump installed at the lubricating oil inlet, so that the outlet temperature of the plate cooler gradually increases. When the temperature sensor at the outlet of the plate cooler is too high (above the set maximum temperature), the system issues a command: on the one hand, to increase the speed of the intake variable frequency cooling fan, and on the other hand, to increase the flow rate of lubricating oil entering the crankcase and crankcase by the liquid pump, while controlling the spraying of water to reduce the temperature of the surrounding environment of the plate cooler.

[0026] The second water pump operates to transport the spray water from the water tank into the spray box. When the spray water is transported into the spray box, it is sprayed onto the surface of the plate cooler through the spray holes. This not only cools the surface of the plate cooler by spraying, but also cleans the surface of the plate cooler by spraying water. At the same time, the sprayed water is filtered by the activated carbon filter and then drawn back into the water tank for recycling.

[0027] During the operation of the first liquid pump, the fluorinated liquid in the first cooling tank is drawn and delivered into the motor housing to cool the internal components. When the fluorinated liquid is sprayed onto the surface of the internal components of the motor housing, a closed loop is formed inside the motor housing to facilitate the circulation, extraction, and spraying of the fluorinated liquid for cooling. This also avoids the poor cooling effect of the motor's own fan and auxiliary cooling, and prevents external dust and dirt from easily entering the motor and affecting heat dissipation.

[0028] When the lubricating oil comes into contact with the magnetic rod, the magnetic rod can attract the iron filings carried by the lubricating oil. When the magnetic rod attracts the iron filings carried by the lubricating oil, it not only prevents the lubricating oil from carrying the iron filings back into the moving box, crankcase and shell and tube heat exchanger, but also facilitates the rapid processing of the attracted iron filings. Attached Figure Description

[0029] Figure 1 It is a schematic diagram of the invention's three-dimensional structure;

[0030] Figure 2 This is a three-dimensional structural diagram of the invention compressor;

[0031] Figure 3 This is a partial three-dimensional exploded structural diagram of the compressor structure of this utility model;

[0032] Figure 4 This is a partial three-dimensional exploded structural diagram of the compressor structure.

[0033] Figure 5This is a partial three-dimensional structural diagram of the liquid cooling structure of the invention;

[0034] Figure 6 This is a schematic diagram of a partial three-dimensional exploded structure of the liquid cooling structure.

[0035] Figure 7 This is a three-dimensional structural diagram of the invention's liquid cooling structure;

[0036] Figure 8 It is a schematic diagram of a three-dimensional partial three-dimensional explosion structure.

[0037] In the diagram: 1. Compressor structure; 101. Motor housing; 102. Stator winding; 103. Rotor; 104. Bearing plate; 105. Conveying hole; 106. Sealing gasket; 107. Moving box; 108. Connecting hole; 109. Piston; 1010. Eccentric bearing; 1011. Crankcase; 1012. Mounting pipe; 1013. Suction pipe; 1014. Exhaust pipe; 1015. First liquid outlet pipe; 1016. Pipe sleeve; 1017. Oil inlet; 1018. First liquid inlet pipe; 1019. Second liquid outlet pipe; 1020. Crank; 1021. Eccentric hole; 1022. First liquid pump; 2. Liquid cooling structure; 201. Base body; 203. Coolant storage tank; 204. Collection frame; 205. Plate cooler; 206. Suction... Variable frequency cooling fan; 207. Spray box; 208. Spray hole; 209. Water tank; 2010. Second liquid pump; 2011. Second liquid outlet pipe; 2012. Third liquid pump; 2013. Third liquid outlet pipe; 2014. Magnetic rod; 2015. Second liquid inlet pipe; 2016. Fourth liquid pump; 2017. Fourth liquid outlet pipe; 2018. Fifth liquid pump; 2019. Shell-and-tube heat exchanger Heater; 2020, Fifth liquid outlet pipe; 2021, Sixth liquid pump; 2022, Return pipe; 2023, Filter box; 2024, Return hole; 2025, Matching through groove; 2026, Hollow frame; 2027, Activated carbon filter element; 2028, Seventh liquid pump; 2029, Sixth liquid outlet pipe; 2030, Third liquid inlet pipe; 2031, Hollow tube; 2032, T-shaped block. Detailed Implementation

[0038] The following is in conjunction with the appendix Figures 1-8 The invention will be described in further detail.

[0039] Please refer to the attached diagram in the instruction manual. Figure 1 , Figure 2 , Figure 3 and Figure 4 One embodiment of the invention is a liquid-cooled air compressor, including a compressor structure 1, which is fixedly mounted on a liquid-cooled structure 2.

[0040] The compressor structure 1 includes a motor housing 101 with a hollow internal structure, and a stator winding 102 is fixedly connected inside the motor housing 101. A rotor 103 is disposed inside the motor housing 101 and rotates in the stator winding 102. Both ends of the motor housing 101 are fixedly connected to bearing plates 104 with sealed bearings by fixing screws. The motor housing 101 has a conveying hole 105 through it on the top surface and one side below to facilitate the conveying and circulation of cooling liquid.

[0041] See the attached diagram in the instruction manual. Figure 1 , Figure 2 , Figure 3 and Figure 4 The bearing plate 104 is fixedly connected to the movable box 107, which has a hollow internal structure, through the sealing gasket 106 and the fixing nut. The movable box 107 has a through-hole 108 on the top and both sides. The movable box 107 has an extension hole on the top of the movable box 107 to facilitate the fixing of one end of the screw extending into the movable box 107. The movable box 107 has a crank 1020 with one end extending out of the movable box 107. One end of the crank 1020 is connected to the piston 109 through the piston pin.

[0042] See the attached diagram in the instruction manual. Figure 1 , Figure 2 , Figure 3 and Figure 4 The crank 1020 has an eccentric hole 1021 at the other end, and an eccentric bearing 1010 is installed inside the eccentric hole 1021. The eccentric bearing 1010 is connected to one end of the rotor 103. The movable housing 107 is also fixedly connected to the crankcase 1011 on both sides by fixing nuts. The crankcase 1011 is equipped with a movable and adjustable piston 109. The crankcase 1011 has an installation tube 1012 fixedly connected to one side and the rear end. The installation tube 1012 is threaded with an intake pipe 1013 and an exhaust pipe 1014 respectively.

[0043] See the attached diagram in the instruction manual. Figure 1 , Figure 2 , Figure 3 and Figure 4 The bottom of both the movable housing 107 and the crankcase 1011 is inlaid with a first outlet pipe 1015 for easy discharge of lubricating oil. The movable housing 107 is provided with an oil inlet hole 1017 for easy fixed connection with the sleeve 1016. The delivery hole 105 is fixedly connected to one end of the first inlet pipe 1018 and the outlet pipe 1019 respectively. The other end of the first inlet pipe 1018 is installed and connected to one end of the first liquid pump 1022.

[0044] See the attached diagram in the instruction manual. Figure 5 , Figure 6 , Figure 7 and Figure 8The liquid cooling structure 2 includes a base body 201 fixedly connected to the compressor structure 1, and a through hole is provided on the surface of the base body 201 to facilitate the extension of the first liquid outlet pipe 1015. A first cooling box 202 is fixedly connected to one side of the upper part of the base body 201, and a coolant storage box 203 is fixedly connected to the other side of the upper part of the base body 201. A collection frame 204 for collecting spray water is fixedly connected to one side of the coolant storage box 203, and a plate cooler 205 is fixedly connected inside the collection frame 204. Suction-type variable frequency cooling fans 206 are fixedly connected to both sides of the collection frame 204, and a spray box 207 with a hollow internal structure is fixedly connected above the surface of the suction-type variable frequency cooling fan 206. A spray hole 208 for spraying and cooling the surface of the plate cooler 205 is provided through the bottom of the spray box 207.

[0045] See the attached diagram in the instruction manual. Figure 5 , Figure 6 , Figure 7 and Figure 8 A water tank 209 with an internal water level sensing module is fixedly connected to one side of the collection frame 204. A second liquid pump 2010 is installed above the surface of the water tank 209. A second liquid outlet pipe 2011 is installed above the second liquid pump 2010. The second liquid outlet pipe 2011 is fixedly connected to one side of the plate cooler 205. The other end of the plate cooler 205 is installed and connected to one end of the third liquid pump 2012. The other end of the third liquid pump 2012 is installed and connected to the third liquid outlet pipe 2013. The other end of the third liquid outlet pipe 2013 is embedded and connected to the surface of the spray box 207.

[0046] See the attached diagram in the instruction manual. Figure 5 , Figure 6 , Figure 7 and Figure 8 The lower end of the plate cooler 205 is connected to the coolant storage tank 203 via the second inlet pipe 2015 and the fourth liquid pump 2016, and the lower end of the plate cooler 205 is connected to the upper end of the shell-and-tube heat exchanger 2019 via the fourth outlet pipe 2017 and the fifth liquid pump 2018. The upper end of the shell-and-tube heat exchanger 2019 is connected to the coolant storage tank 203 via the fifth outlet pipe 2020 and the sixth liquid pump 2021.

[0047] See the attached diagram in the instruction manual. Figure 5 , Figure 6 , Figure 7 and Figure 8The second liquid pump 2010 has a through-hole reflux pipe 2022 with an internal one-way control valve embedded in its suction end. The reflux pipe 2022 is also through-hole connected to the surface of the filter box 2023, which has a hollow internal structure. The filter box 2023 has through-holes 2024 on both sides and a matching through-slot 2025 on the surface of the filter box 2023. The matching through-slot 2025 is connected to a hollow frame 2026 with the same reflux holes 2024. The hollow frame 2026 is equipped with an activated carbon filter element 2027 for filtering the spray water.

[0048] See the attached diagram in the instruction manual. Figure 5 , Figure 6 , Figure 7 and Figure 8 The shell-and-tube heat exchanger 2019 is connected to the tube sleeve 1016 at one end via the seventh liquid pump 2028 and the sixth liquid outlet pipe 2029. The shell-and-tube heat exchanger 2019 is also connected to the other end via the third liquid inlet pipe 2030. The third liquid inlet pipe 2030 extends through the base body 201 and below the base body 201. One end of the third liquid inlet pipe 2030 is connected to one end of the hollow tube 2031 via the eighth liquid pump 2034. The hollow tube 2031 is connected to the first liquid outlet pipe 1015. A T-shaped block 2032 is connected to one end of the hollow tube 2031. A magnetic rod 2014 extending inside the hollow tube 2031 is fixedly connected to one end of the T-shaped block 2032.

[0049] Working principle: When using this liquid-cooled air compressor, when the stator winding 102 is energized, the rotor 103 rotates. During this rotation, the rotor 103 carries the piston 109 through the crank 1020, eccentric bore 1021, and eccentric bearing 1010, causing it to reciprocate within the crankcase 1011. As the piston 109 reciprocates within the crankcase 1011, it draws in external air through the intake pipe 1013 and compresses it. The compressed air then passes through the outlet pipe 101. 4. The fluorinated liquid is stored inside the storage tank. During operation, the rotor 103 gradually generates heat, at which point the first liquid pump 1022 is activated. While the first liquid pump 1022 is operating, it delivers the fluorinated liquid from the first cooling tank 202 to the motor housing 101 through the first inlet pipe 1018. The fluorinated liquid inside the motor housing 101 cools the stator windings 102 and the rotor 103. Simultaneously, a portion of the fluorinated liquid is re-delivered to the first cooling tank 202 through the outlet pipe 1019. The coolant is circulated and extracted in tank 202, while the fourth liquid pump 2016 is operated. When the fourth liquid pump 2016 is operating, it delivers coolant from the coolant storage tank 203 to the plate cooler 205 through the second inlet pipe 2015 for heat exchange. During the heat exchange process, the second liquid pump 2010 operates synchronously. When the second liquid pump 2010 is operating, it delivers cooling water from the water tank 209 to the plate cooler 205 through the second outlet pipe 2011. Inside, the cooling water supplied to the plate cooler 205 is delivered to the spray box 207 through the third liquid pump 2012 and the third liquid outlet pipe 2013, and sprayed into the plate cooler 205 through the spray holes 208. The spray water is collected in the collection frame 204. At this time, the spray water is delivered to the filter box 2023 through the return hole 2024 and the activated carbon filter element 2027. When the return pipe 2022 is opened, the spray water is also circulated and sprayed for use by the second liquid pump 2010.

[0050] During the circulation of the spray water, the seventh liquid pump 2028 is operated. When the seventh liquid pump 2028 is operating, it delivers lubricating oil through the sixth outlet pipe 2029 and the sleeve 1016 to the movable box 107 and crankcase 1011 for lubrication and cooling. At the same time, the lubricating oil entering the movable box 107 and crankcase 1011 is delivered to the hollow tube 2031 through the first outlet pipe 1015. The lubricating oil entering the hollow tube 2031 is attracted by iron filings by the magnetic rod 2014 and then delivered again to the shell-and-tube heat exchanger 2019 through the eighth liquid pump 2034 and the third inlet pipe 2030 for heat exchange. Meanwhile, the coolant that has undergone preliminary heat exchange is delivered to the shell-and-tube heat exchanger 2019 through the fourth outlet pipe 2017 and the fifth liquid pump 2018 for heat exchange treatment of the lubricating oil. When the temperature sensor installed at the outlet of the plate cooler 205 detects that the outlet temperature is too low and below the set minimum temperature, the system issues an instruction: on the one hand, to reduce the speed of the intake variable frequency cooling fan 206, and on the other hand, to reduce the flow rate of the incoming lubricating oil by the seventh liquid pump 2028, so that the outlet temperature of the plate cooler 205 gradually increases; when the temperature sensor at the outlet of the plate cooler 205 is too high and exceeds the set maximum temperature, the system issues an instruction: on the one hand, to increase the speed of the intake variable frequency cooling fan 206, and on the other hand, to increase the flow rate of the incoming lubricating oil by the seventh liquid pump 2028, so as to reduce the temperature of the surrounding environment of the plate cooler 205. After the coolant has undergone heat exchange, it is transported to the coolant storage tank 203 for circulation through the fifth liquid outlet pipe 2020 and the sixth liquid pump 2021.

[0051] The above are all preferred embodiments of the invention and are not intended to limit the scope of protection of the invention. Therefore, all equivalent changes made to the structure, shape and principle of the invention should be included within the scope of protection of the invention.

Claims

1. A liquid-cooled air compressor, comprising a compressor structure (1), characterized in that: The compressor structure (1) is fixedly installed on the liquid cooling structure (2); The compressor structure (1) includes a motor housing (101) with a hollow internal structure, and a stator winding (102) is fixedly connected inside the motor housing (101). A rotor (103) rotating in the stator winding (102) is provided inside the motor housing (101). Both ends of the motor housing (101) are fixedly connected to a bearing plate (104) with a sealed bearing by fixing screws. A conveying hole (105) is provided above the surface of the motor housing (101) and below one side to facilitate the conveying and circulation of cooling liquid.

2. The liquid-cooled air compressor according to claim 1, characterized in that: The bearing plate (104) is fixedly connected to the movable box (107) with a hollow internal structure through a sealing gasket (106) and a fixing nut. The movable box (107) has a connecting hole (108) through the top and sides. The movable box (107) has an extension hole through the top of the surface to facilitate the fixing of one end of the screw extending into the interior of the movable box (107). The movable box (107) has a crank (1020) with one end extending out of the exterior of the movable box (107). One end of the crank (1020) is connected to the piston (109) through a piston pin.

3. The liquid-cooled air compressor according to claim 2, characterized in that: The crank (1020) has an eccentric hole (1021) at the other end, and an eccentric bearing (1010) is installed inside the eccentric hole (1021). The eccentric bearing (1010) is connected to one end of the rotor (103). The movable housing (107) is also fixedly connected to the crankcase (1011) on both sides by fixing nuts. The crankcase (1011) is provided with a movable and adjustable piston (109). The crankcase (1011) is fixedly connected to one side and the rear end by an installation tube (1012), and the installation tube (1012) is threaded with an intake pipe (1013) and an exhaust pipe (1014).

4. The liquid-cooled air compressor according to claim 2, characterized in that: The bottom of the movable box (107) and the crankcase (1011) are both inlaid with a first outlet pipe (1015) for easy discharge of lubricating oil. The movable box (107) is provided with an oil inlet hole (1017) for easy fixed connection with the sleeve (1016). The delivery hole (105) is fixedly connected to one end of the first inlet pipe (1018) and the outlet pipe (1019) respectively. The other end of the first inlet pipe (1018) is installed and connected to one end of the first liquid pump (1022).

5. The liquid-cooled air compressor according to claim 1, characterized in that: The liquid cooling structure (2) includes a base body (201) fixedly connected to a compressor structure (1), and a through hole is provided on the surface of the base body (201) to facilitate the extension of the first liquid outlet pipe (1015). A first cooling box (202) is fixedly connected to one side of the base body (201), and a coolant storage box (203) is fixedly connected to the other side of the base body (201). A collection frame (204) for collecting spray water is fixedly connected to one side of the coolant storage box (203), and a plate cooler (205) is fixedly connected inside the collection frame (204). A suction-type variable frequency cooling fan (206) is fixedly connected to both sides of the collection frame (204), and a spray box (207) with a hollow internal structure is fixedly connected above the surface of the suction-type variable frequency cooling fan (206). A spray hole (208) for spraying and cooling the surface of the plate cooler (205) is provided through the bottom of the spray box (207).

6. The liquid-cooled air compressor according to claim 5, characterized in that: The collection box (204) is fixedly connected to a water tank (209) with an internal water level sensing module on one side. A second liquid pump (2010) is installed above the surface of the water tank (209). A second liquid outlet pipe (2011) is installed above the second liquid pump (2010). The second liquid outlet pipe (2011) is fixedly connected to one side of the plate cooler (205). The other end of the plate cooler (205) is installed and connected to one end of a third liquid pump (2012). The other end of the third liquid pump (2012) is installed and connected to the third liquid outlet pipe (2013). The other end of the third liquid outlet pipe (2013) is embedded and connected to the surface of the spray box (207).

7. The liquid-cooled air compressor according to claim 5, characterized in that: The lower end of the plate cooler (205) is connected to the coolant storage tank (203) via the second inlet pipe (2015) and the fourth liquid pump (2016), and the lower end of the plate cooler (205) is connected to the upper end of the shell-and-tube heat exchanger (2019) via the fourth outlet pipe (2017) and the fifth liquid pump (2018). The upper end of the shell-and-tube heat exchanger (2019) is connected to the coolant storage tank (203) via the fifth outlet pipe (2020) and the sixth liquid pump (2021).

8. The liquid-cooled air compressor according to claim 6, characterized in that: The second liquid pump (2010) has a through-hole reflux pipe (2022) with an internal one-way control valve embedded in its suction end. The reflux pipe (2022) is also through-hole connected to the surface of the filter box (2023) which has a hollow internal structure. The filter box (2023) has through-holes (2024) on both sides and a matching through-slot (2025) on the surface of the filter box (2023). The matching through-slot (2025) is connected to a hollow frame (2026) with the same reflux holes (2024). The hollow frame (2026) is equipped with an activated carbon filter element (2027) for filtering the spray water.

9. The liquid-cooled air compressor according to claim 7, characterized in that: The shell-and-tube heat exchanger (2019) is connected to the tube sleeve (1016) at one end via a seventh liquid pump (2028) and a sixth liquid outlet pipe (2029). The shell-and-tube heat exchanger (2019) is also connected to a third liquid inlet pipe (2030) at the other end. The third liquid inlet pipe (2030) extends through the base body (201) and below it. One end of the third liquid inlet pipe (2030) is connected to one end of the hollow tube (2031) via an eighth liquid pump (2034). The hollow tube (2031) is connected to the first liquid outlet pipe (1015). A T-shaped block (2032) is connected to one end of the hollow tube (2031). A magnetic rod (2014) extending inside the hollow tube (2031) is fixedly connected to one end of the T-shaped block (2032).

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