Refrigerant direct cooling driven air compressor

Abstract

The application relates to the technical field of honeycomb activated carbon preparation, in particular to a refrigerant direct-cooling driven air compressor which comprises an air compression mechanism, a material preparation mechanism and a lubricating mechanism, the air compression mechanism comprises a gas storage tank, a driving chamber fixed to the top of the gas storage tank and a piston rod installed in the driving chamber in an interference mode. In the application, the mixture of high-pressure liquid refrigerant and trace PAG synthetic oil is injected into the lower cavity through a refrigerant liquefaction pipe, and then flash evaporation occurs instantaneously by using the pressure difference between the lower cavity and the air separation tank; a large amount of heat is absorbed in the process of the violent gasification of the liquid refrigerant, and the inside of the driving chamber and the piston rod are forcedly cooled. In the process, the heat generated by compression is synchronously taken away, so that the piston rod and the shell are always operated at a low temperature, the problem of high-temperature accumulation caused by the superposition of copper loss, iron loss and friction heat in the traditional motor driving mode is fundamentally avoided, and the compression efficiency and the whole-machine operation stability are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of corn harvester technology, specifically to a refrigerant direct-cooling driven air compressor. Background Technology

[0002] Traditional piston compressors consist of an electric motor and a connecting rod piston. The piston converts the rotational motion of the motor into linear motion within the compression chamber. When the piston moves downward, the space inside the cylinder suddenly expands (i.e., above the piston), and the pressure inside is lower than outside. The intake valve opens, and air is drawn in. When the piston reaches its lowest point, the intake valve closes. When the piston rises, the volume of air decreases, and the air begins to be compressed. When the air is compressed to the required pressure, the outlet valve opens, and this high-pressure air is sent into the storage tank.

[0003] This traditional method faces extremely severe thermal management challenges during operation. The copper and iron losses generated by the motor continuously radiate a large amount of heat to the area surrounding the compression chamber. Simultaneously, the intense frictional heat generated between the piston and cylinder wall during the high-frequency reciprocating motion of the piston rapidly accumulates in the confined space and cannot be effectively dissipated. This superposition of multiple heat loads causes a sharp rise in the temperature within the compression chamber, leading not only to a significant decrease in compression efficiency but also to the rapid oxidation and deterioration of the lubricating oil due to high temperatures, resulting in loss of lubrication and sealing properties, and further exacerbating abnormal wear between the piston rings and cylinder wall. Summary of the Invention

[0004] The present invention aims to solve one of the technical problems existing in the prior art or related technologies.

[0005] Therefore, the technical solution adopted in this invention is as follows: A refrigerant-driven direct-cooling air compressor includes an air compressor mechanism, a feed mechanism, and a lubrication mechanism. The air compressor mechanism includes an air tank, a drive chamber fixedly connected to the top of the air tank, a piston rod interference-fitted into the drive chamber, a spring fixed between the bottom surface of the drive chamber and the bottom surface of the piston rod, a refrigerant liquefaction pipe and a refrigerant vaporization pipe respectively passing through both sides of the bottom of the drive chamber, an air separator fixed between one end of the air tank and the outer end of the refrigerant vaporization pipe, a solenoid valve one installed on the refrigerant vaporization pipe, an air inlet pipe fixedly passing through the top of the drive chamber, an air outlet pipe fixedly connected between the top of the drive chamber and the top of the air separator, and a solenoid valve two installed on the air outlet pipe. The feed mechanism includes components fixedly connected to the outer end of the refrigerant liquefaction pipe and the air tank. The system includes a preparatory box at the top, a control valve one installed on the refrigerant liquefaction pipe, a connecting pipe fixedly passing through one end of the preparatory box, a storage tank fixedly connected between the outer end of the connecting pipe and the top of the gas storage tank, a control valve two installed on the connecting pipe, and a lubrication mechanism. The lubrication mechanism includes an oil tank fixedly connected to the top of the preparatory box, an electric flow valve installed on the output end of the oil tank, a rocker arm rotatably connected to the outer end of the U-shaped frame, a tactile switch suspended on the top of the rocker arm and fixedly connected to the preparatory box, an L-rod rotatably passing through the front side of the connecting pipe, and multiple leaflets rotatably located inside the connecting pipe and fixedly connected to the outer wall of the L-rod. The electric flow valve is electrically connected to the tactile switch, and the solenoid valve one, solenoid valve two, control valve one, and control valve two are all electrically connected to an external PLC.

[0006] By adopting the above technical solution, the mixture of high-pressure liquid refrigerant and trace amounts of PAG synthetic oil is injected into the lower chamber through the refrigerant liquefaction pipe. The mixture undergoes instantaneous flash evaporation due to the pressure difference between the lower chamber and the air separator. During the intense vaporization of the liquid refrigerant, a large amount of heat is absorbed, directly and forcibly cooling the drive chamber and piston rod. In this process, the heat generated during compression is simultaneously carried away, keeping the piston rod and outer casing at a consistently low temperature. This fundamentally avoids the high-temperature accumulation problem caused by the superposition of copper losses, iron losses, and frictional heat in traditional motor-driven systems, significantly improving compression efficiency and overall machine operational stability.

[0007] In a preferred embodiment, the present invention can be further configured such that the drive chamber is composed of an outer shell and multiple fins, the multiple fins being equally spaced and fixedly sleeved on the outer side of the outer shell in a row.

[0008] In a preferred embodiment, the present invention can be further configured such that: the piston rod divides the interior of the housing into an upper chamber and a lower chamber, the upper chamber is located at the top of the lower chamber, the spring is located inside the lower chamber, and the air inlet pipe and the air outlet pipe are both connected to the interior of the upper chamber.

[0009] In a preferred embodiment, the present invention can be further configured such that the refrigerant liquefaction pipe and the refrigerant vaporization pipe are laterally coaxial, and both are connected to the interior of the lower cavity.

[0010] In a preferred embodiment, the present invention may be further configured as follows: the air separator is composed of a tank body, an isolation pipe, a top sleeve, and an air pipe. The tank body is located on one side of the air storage tank. The air pipe is fixed between the bottom end of the tank body and one end of the air storage tank. The isolation pipe is fixed to the center of the bottom surface of the tank body. The top sleeve is suspended above the isolation pipe and fixed to the inner wall of the tank body.

[0011] In a preferred embodiment, the present invention may be further configured such that: the top of the preparation box is provided with an exhaust mechanism, the exhaust mechanism including a bubble tube disposed between the control valve and the oil tank and fixedly passing through the top of the preparation box, a bottle body screwed to the outer end of the bubble tube, and a material sensor installed on the bubble tube, the preparation box being connected to the inside of the bottle body through the bubble tube.

[0012] In a preferred embodiment, the present invention may be further configured such that the incoming material sensor is located near the top of the bottle, and the bottle is made of a transparent material.

[0013] In a preferred embodiment, the present invention may be further configured such that an air filter is screwed onto the top of the air inlet pipe.

[0014] In a preferred embodiment, the present invention may be further configured such that a base plate is fixedly connected between the bottom of the gas storage tank and the bottom of the air separator, the base plate being made of a metal material.

[0015] In a preferred embodiment, the present invention may be further configured such that: a bracket is fixedly sleeved at the bottom of the outer end of the storage tank, and the bottom of the bracket is fixedly connected to the top of the base plate.

[0016] By adopting the above technical solution, the beneficial effects achieved by the present invention are as follows: 1. In this invention, the mixture of high-pressure liquid refrigerant and a trace amount of PAG synthetic oil is injected into the lower chamber through the refrigerant liquefaction pipe. The mixture undergoes instantaneous flash evaporation due to the pressure difference between the lower chamber and the air separator. During this intense vaporization of the liquid refrigerant, a large amount of heat is absorbed, directly and forcibly cooling the drive chamber and piston rod. In this process, the heat generated during compression is simultaneously carried away, ensuring that the piston rod and outer casing operate at a consistently low temperature. This fundamentally avoids the high-temperature accumulation problem caused by the superposition of copper losses, iron losses, and frictional heat in traditional motor-driven systems, significantly improving compression efficiency and overall machine operational stability.

[0017] 2. In this invention, PAG synthetic oil is pre-mixed with high-pressure liquid refrigerant in a pre-mixing box to form a "refrigerant-lubricating oil mixture." When the mixture is injected into the lower chamber through the refrigerant liquefaction pipe and flash evaporation occurs, a trace amount of PAG synthetic oil is instantly precipitated and precisely deposited on the friction surface between the piston rod and the inner wall of the outer casing, forming a uniform and stable lubricating film. This lubricating film effectively reduces the coefficient of friction between the piston rod and the outer casing during high-frequency reciprocating motion, significantly reducing frictional heat and mechanical wear. It avoids lubrication failure and abnormal wear problems caused by high-temperature oxidation and deterioration of lubricating oil in traditional compressors, thereby significantly extending the service life and maintenance cycle of the piston rod and drive chamber.

[0018] 3. In this invention, air bubbles in the preparatory box can be promptly discharged into the bottle through the air bubble tube. The incoming material sensor monitors the air bubble discharge in real time and sends a feedback signal to the PLC, ensuring that the preparatory box always contains a pure liquid "refrigerant-lubricating oil mixture". This avoids the air bubbles from weakening the flash evaporation driving effect due to their volume occupation after entering the lower chamber with the refrigerant liquefaction tube, and ensures that the amount of refrigerant and lubricating oil injected into the lower chamber each time is accurate and consistent. This ensures that the driving force and stroke height of the piston rod are stable each time it rises, improving the reliability of the whole machine and the consistency of compressed air quality. Attached Figure Description

[0019] Figure 1 This is a perspective view of the overall structure of the present invention; Figure 2 This is a schematic diagram of the air compressor mechanism of the present invention; Figure 3 For the present invention Figure 3 Enlarged view of the A-section structure; Figure 4 This is a schematic diagram of the internal structure of the drive room of the present invention; Figure 5 This is a schematic diagram of the air separator of the present invention; Figure 6 This is a schematic diagram of the material preparation mechanism of the present invention; Figure 7 This is a schematic diagram showing the cooperation relationship between the lubrication mechanism and the exhaust mechanism of the present invention; Figure 8 For the present invention Figure 7 Enlarged view of the structure of part B.

[0020] Figure label: 100. Air compressor mechanism; 110. Air tank; 120. Drive chamber; 121. Outer shell; 122. Fins; 123. Upper chamber; 124. Lower chamber; 130. Piston rod; 140. Spring; 150. Refrigerant liquefaction pipe; 160. Refrigerant vaporization pipe; 170. Air separator; 171. Tank body; 172. Isolation pipe; 173. Top sleeve; 174. Air pipe; 180. Solenoid valve one; 190. Air inlet pipe; 191. Air outlet pipe; 192. Solenoid valve two; 200. Material preparation mechanism; 210. Preparatory box; 220. Control valve one; 230. Connecting pipe; 240. Storage tank; 250. Control valve two; 300. Lubrication mechanism; 310. Oil tank; 320. Electric flow valve; 330. U-shaped bracket; 340. Rocker; 350. Tactile switch; 360. L-shaped lever; 370. Leaflet; 400. Exhaust mechanism; 410. Bubble tube; 420. Bottle body; 430. Incoming material sensor; 500. Air filter; 600, base plate; 700, bracket. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0022] It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the invention.

[0023] The following describes, with reference to the accompanying drawings, some embodiments of a refrigerant-driven direct-cooling air compressor provided by the present invention.

[0024] Example 1: Combining Figures 1-8As shown, the present invention provides a refrigerant direct-cooling driven air compressor, including an air compressor mechanism 100, a material preparation mechanism 200, and a lubrication mechanism 300. The air compressor mechanism 100 includes an air tank 110, a drive chamber 120 fixedly connected to the top of the air tank 110, a piston rod 130 interference-fitted inside the drive chamber 120, a spring 140 fixedly connected between the bottom surface of the drive chamber 120 and the bottom surface of the piston rod 130, and a refrigerant direct-cooling driven air compressor 300 passing through both sides of the bottom of the drive chamber 120. The refrigerant liquefaction pipe 150 and refrigerant vaporization pipe 160, an air separator 170 fixed between one end of the gas storage tank 110 and the outer end of the refrigerant vaporization pipe 160, a solenoid valve 180 installed on the refrigerant vaporization pipe 160, an air inlet pipe 190 fixedly penetrating the top of the drive chamber 120, an air outlet pipe 191 fixedly connected between the top of the drive chamber 120 and the top of the air separator 170, and a solenoid valve 192 installed on the air outlet pipe 191; The material preparation mechanism 200 includes a preparation box 210 fixed between the outer end of the refrigerant liquefaction pipe 150 and the top of the gas storage tank 110, a control valve 220 installed on the refrigerant liquefaction pipe 150, a connecting pipe 230 fixedly passing through one end of the preparation box 210, a storage tank 240 fixedly connected between the outer end of the connecting pipe 230 and the top of the gas storage tank 110, and a control valve 250 installed on the connecting pipe 230. The lubrication mechanism 300 includes an oil tank 310 fixed to the top of the preparation box 210, an electric flow valve 320 installed on the output end of the oil tank 310, a rocker 340 rotatably connected to the outer end of the U-shaped frame 330, a tactile switch 350 suspended on the top of the rocker 340 and fixed to the preparation box 210, an L-rod 360 rotatably passing through the front side of the connecting pipe 230, and multiple leaflets 370 rotatably disposed inside the connecting pipe 230 and fixed to the outer wall of the L-rod 360. The electric flow valve 320 is electrically connected to the tactile switch 350, and the solenoid valve 180, solenoid valve 292, control valve 120, and control valve 250 are all electrically connected to an external PLC.

[0025] Furthermore, the drive chamber 120 is composed of an outer shell 121 and multiple fins 122. The multiple fins 122 are evenly spaced and fixedly sleeved on the outer side of the outer shell 121. The structural design of the drive chamber 120 makes it easier to conduct heat.

[0026] Furthermore, the piston rod 130 divides the interior of the outer casing 121 into an upper chamber 123 and a lower chamber 124. The upper chamber 123 is located at the top of the lower chamber 124, and the spring 140 is located inside the lower chamber 124. The air inlet pipe 190 and the air outlet pipe 191 are both connected to the interior of the upper chamber 123. The opening of the upper chamber 123 and the lower chamber 124 ensures that the air and the "refrigerant-lubricating oil mixture" do not interfere with each other, thus ensuring stable operation of the compressed air system.

[0027] Furthermore, the refrigerant liquefaction pipe 150 and the refrigerant vaporization pipe 160 are laterally coaxial and both are connected to the interior of the lower cavity 124. This structural design ensures that the "refrigerant-lubricating oil mixture" can continuously pass through the lower cavity 124, providing kinetic energy for the reciprocating lifting and lowering of the piston rod 130.

[0028] Furthermore, the air separator 170 is composed of a tank body 171, an isolation pipe 172, a top sleeve 173, and an air pipe 174. The tank body 171 is located on one side of the air storage tank 110. The air pipe 174 is fixed between the bottom end of the tank body 171 and one end of the air storage tank 110. The isolation pipe 172 is fixed to the center of the bottom surface inside the tank body 171. The top sleeve 173 is suspended at the top of the isolation pipe 172 and is fixed to the inner wall of the tank body 171. The tank body 171, as a separation container, provides sufficient settling space. After the high-pressure air enters the tank body 171, the flow rate drops sharply. The principle of gravity settling is used to allow the trace amounts of lubricating oil droplets and refrigerant droplets mixed in the air to settle naturally. The isolation pipe 172 and the top sleeve 173 work together to form a specific airflow path—high-pressure air enters the tank 171 from the air outlet pipe 191, descends along the outer wall of the isolation pipe 172 to the bottom, and then turns back upward. During this process, the airflow direction changes multiple times, which is more conducive to the removal of droplets from the airflow under the action of inertia and gravity. The top sleeve 173 is suspended at the top of the isolation pipe 172, forcing the airflow to change direction again at the outlet, further intercepting residual droplets, and ensuring that the air that finally enters the air storage tank 110 through the air pipe 174 is pure and dry.

[0029] Furthermore, a base plate 600 is fixedly connected between the bottom of the gas storage tank 110 and the bottom of the air separator 170. The base plate 600 is made of metal material. The base plate 600 can improve the installation firmness of the gas storage tank 110 and the air separator 170.

[0030] Furthermore, a bracket 700 is fixedly sleeved at the bottom of the outer end of the storage tank 240. The bottom of the bracket 700 is fixedly connected to the top of the base plate 600. The bracket 700 improves the installation stability of the storage tank 240 to a certain extent.

[0031] Example 2: Combination Figure 1 and Figure 7As shown, based on Embodiment 1, the top of the preparation box 210 is provided with an exhaust mechanism 400. The exhaust mechanism 400 includes a bubble tube 410 located between the control valve 220 and the oil tank 310 and fixedly passing through the top of the preparation box 210, a bottle body 420 screwed to the outer end of the bubble tube 410, and a material inlet sensor 430 installed on the bubble tube 410. The preparation box 210 communicates with the inside of the bottle body 420 through the bubble tube 410, and the air bubbles in the preparation box 210 can be timely discharged through the bubble tube 410. The material exits into the bottle 420, and the incoming material sensor 430 monitors the bubble discharge in real time and sends a signal back to the PLC. This ensures that the preparatory box 210 always contains a pure liquid "refrigerant-lubricating oil mixture". This prevents the bubbles from entering the lower chamber 124 through the refrigerant liquefaction pipe 150 and weakening the flash evaporation driving effect due to their volume. It also ensures that the amount of refrigerant and lubricating oil injected into the lower chamber 124 each time is accurate and consistent. This ensures that the driving force and stroke height of the piston rod 130 are stable each time it rises, improving the reliability of the whole machine and the consistency of compressed air quality.

[0032] Furthermore, the incoming material sensor 430 is located near the top of the bottle body 420, which is made of transparent material. Using transparent material to make the bottle body 420 allows for instantaneous monitoring of the oil accumulation inside the bottle body 420, preventing oil spillage.

[0033] Example 3: Combination Figure 1-3 As shown, in the above embodiment, an air filter 500 is screwed to the top of the air inlet pipe 190. The air filter 500 can filter out oil in the air entering the upper cavity 123, thereby improving the safety of operation in the drive chamber 120.

[0034] Working principle and usage process of this invention: Material preparation and premixing stage: Before system startup, storage tank 240 contains high-pressure liquid refrigerant, and oil tank 310 contains high-pressure PAG (polyalkylene glycol) synthetic oil. When the device is put into actual use, the external PLC controls the opening of control valve 250. The high-pressure liquid refrigerant in storage tank 240 flows into preparation box 210 along connecting pipe 230, filling preparation box 210 with high-pressure liquid refrigerant. When the high-pressure liquid refrigerant flows through connecting pipe 230, it pushes L rod 360 with paddle 370 to rotate. Each rotation of L rod 360 causes rocker plate 340 to flip once around U-shaped frame 330. The right end of rocker plate 340 briefly presses light touch switch 350, and electric flow valve 320 opens. Oil tank 310 injects a small amount of PAG synthetic oil into preparation box 210, which mixes with high-pressure liquid refrigerant to form a "refrigerant-lubricating oil mixture", thereby providing upward driving force for piston rod 130 and improving lubrication. Drive and compression phases: When the refrigerant-lubricating oil mixture in the preparatory box 210 reaches the set amount, the external PLC closes control valve 250 and opens control valve 220. The mixture in the preparatory box 210 is injected into the lower chamber 124 of the drive chamber 120 through the refrigerant liquefaction pipe 150. Since the lower chamber 124 is connected to the air separator 170 through the refrigerant vaporization pipe 160, and the air separator 170 is kept at a low pressure, the pressure drops sharply after the mixture enters the lower chamber 124, and the liquid refrigerant quickly undergoes a "flash evaporation" phenomenon. When the pressure suddenly drops, it vaporizes violently and expands in volume by tens of times. The resulting high-pressure expansion force directly pushes the piston rod 130 upward, compressing the air in the upper chamber 123. During this process, trace amounts of PAG synthetic oil in the mixture are instantly precipitated during the flash evaporation of the refrigerant and deposited on the friction surface between the piston rod 130 and the inner wall of the outer casing 121, forming an effective lubricating film. This significantly reduces the frictional heat and mechanical wear between the two, effectively solving the problem of lubricating oil oxidation and abnormal wear caused by the accumulation of frictional heat in traditional compressors. Exhaust and separation stages: When the piston rod 130 moves upward, the volume of the upper chamber 123 gradually decreases, and the air is compressed. When the air pressure reaches the set value, the PLC controls the opening of the solenoid valve 192. The high-pressure air enters the air separator 170 through the air outlet pipe 191. The high-pressure air flows in the tank 171 along the path formed by the isolation pipe 172 and the top sleeve 173. Some of the mixed trace amounts of lubricating oil or refrigerant vapor are removed from the air under the action of gravity separation. The pure high-pressure air finally enters the air storage tank 110 through the air pipe 174 for storage and standby. Decompression and reset phase: After the compression stroke ends and the high-pressure air is discharged, the PLC closes control valve 220 and opens solenoid valve 180. The low-pressure gaseous refrigerant that has expanded in the lower chamber 124 is discharged into the air separator 170 through the refrigerant vaporization pipe 160. After gas-liquid separation by the air separator 170, it is recovered to the air storage tank 110 or returned to the refrigerant circulation system. The pressure in the lower chamber 124 drops sharply, and the piston rod 130 falls rapidly downward under the combined action of the elastic restoring force of the spring 140 and the residual air pressure in the upper chamber 123. At the same time, outside air is drawn into the upper chamber 123 through the air inlet pipe 190, thus completing a complete working cycle.

[0035] Looping operation: The above-mentioned cycle of "material preparation → liquid injection → flash evaporation drive → compression exhaust → pressure relief and reset" is repeated continuously. Solenoid valve 180, solenoid valve 2192, control valve 120 and control valve 250 are all opened and closed alternately at high frequency under the timing control of PLC, realizing the high-frequency reciprocating motion of piston rod 130, continuously producing high-pressure air and sending it into air storage tank 110.

[0036] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A refrigerant-driven direct-cooling air compressor, characterized in that, include: An air compressor mechanism (100) includes an air tank (110), a drive chamber (120) fixedly connected to the top of the air tank (110), a piston rod (130) interference-fitted inside the drive chamber (120), a spring (140) fixedly connected between the bottom surface of the drive chamber (120) and the bottom surface of the piston rod (130), a refrigerant liquefaction pipe (150) and a refrigerant vaporization pipe (160) respectively passing through both sides of the bottom of the drive chamber (120), and a fixed connection. An air separator (170) is located between one end of the gas storage tank (110) and the outer end of the refrigerant vaporization pipe (160); a solenoid valve one (180) is installed on the refrigerant vaporization pipe (160); an air inlet pipe (190) is fixedly inserted through the top of the drive chamber (120); an air outlet pipe (191) is fixedly connected between the top of the drive chamber (120) and the top of the air separator (170); and a solenoid valve two (192) is installed on the air outlet pipe (191). The material preparation mechanism (200) includes a preparation box (210) fixed between the outer end of the refrigerant liquefaction pipe (150) and the top of the gas storage tank (110), a control valve one (220) installed on the refrigerant liquefaction pipe (150), a connecting pipe (230) fixedly passing through one end of the preparation box (210), a storage tank (240) fixedly connected between the outer end of the connecting pipe (230) and the top of the gas storage tank (110), and a control valve two (250) installed on the connecting pipe (230). The lubrication mechanism (300) includes an oil tank (310) fixed to the top of the preparation box (210), an electric flow valve (320) installed on the output end of the oil tank (310), a rocker (340) rotatably connected to the outer end of the U-shaped frame (330), a tactile switch (350) suspended on the top of the rocker (340) and fixed to the preparation box (210), an L-rod (360) rotatably passing through the front side of the connecting pipe (230), and multiple leaflets (370) rotatably disposed inside the connecting pipe (230) and fixed to the outer wall of the L-rod (360). The electric flow valve (320) is electrically connected to the tactile switch (350), and the solenoid valve one (180), solenoid valve two (192), control valve one (220), and control valve two (250) are all electrically connected to an external PLC.

2. A refrigerant-driven direct-cooling air compressor according to claim 1, characterized in that, The drive chamber (120) is composed of an outer shell (121) and multiple fins (122). The multiple fins (122) are evenly spaced and fixedly sleeved on the outer side of the outer shell (121).

3. A refrigerant-driven direct-cooling air compressor according to claim 2, characterized in that, The piston rod (130) divides the interior of the outer casing (121) into an upper chamber (123) and a lower chamber (124). The upper chamber (123) is located at the top of the lower chamber (124). The spring (140) is located inside the lower chamber (124). The air inlet pipe (190) and the air outlet pipe (191) are both connected to the interior of the upper chamber (123).

4. A refrigerant-driven direct-cooling air compressor according to claim 3, characterized in that, The refrigerant liquefaction pipe (150) and the refrigerant vaporization pipe (160) are horizontally coaxial, and both are connected to the interior of the lower cavity (124).

5. A refrigerant-driven direct-cooling air compressor according to claim 1, characterized in that, The air separator (170) is composed of a tank body (171), an isolation pipe (172), a top sleeve (173), and an air pipe (174). The tank body (171) is located on one side of the gas storage tank (110). The air pipe (174) is fixed between the bottom end of the tank body (171) and one end of the gas storage tank (110). The isolation pipe (172) is fixed to the center of the bottom surface inside the tank body (171). The top sleeve (173) is suspended above the isolation pipe (172) and fixed to the inner wall of the tank body (171).

6. A refrigerant-driven direct-cooling air compressor according to claim 1, characterized in that, The top of the preparation box (210) is provided with an exhaust mechanism (400). The exhaust mechanism (400) includes a bubble tube (410) located between the control valve (220) and the oil tank (310) and fixedly passing through the top of the preparation box (210), a bottle body (420) screwed to the outer end of the bubble tube (410), and a material sensor (430) installed on the bubble tube (410). The preparation box (210) is connected to the inside of the bottle body (420) through the bubble tube (410).

7. A refrigerant-driven direct-cooling air compressor according to claim 6, characterized in that, The incoming material sensor (430) is located near the top of the bottle body (420), which is made of a transparent material.

8. A refrigerant-driven direct-cooling air compressor according to claim 1, characterized in that, An air filter (500) is screwed onto the top of the air inlet pipe (190).

9. A refrigerant-driven direct-cooling air compressor according to claim 1, characterized in that, A base plate (600) is fixed between the bottom of the gas storage tank (110) and the bottom of the air separator (170), and the base plate (600) is made of metal.

10. A refrigerant-driven direct-cooling air compressor according to claim 9, characterized in that, A bracket (700) is fixedly sleeved at the bottom of the outer end of the storage tank (240), and the bottom of the bracket (700) is fixedly connected to the top of the base plate (600).

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