Oil separator for carbon dioxide refrigerating system

Abstract

The utility model discloses an oil separator for a carbon dioxide refrigerating system, which relates to the technical field of carbon dioxide refrigerating systems, and comprises a separator main body, a cooling mechanism arranged at the center of the separator main body, a scraper mechanism arranged inside the separator main body, an oil collecting chamber arranged on the lower side of the scraper mechanism, and a separation chamber shell, a plurality of baffle plates are arranged inside the separation chamber shell, the scraper mechanism comprises a gear bearing box which is fixedly connected to the separation chamber shell, a rotating supporting shaft is installed on the gear bearing box, a plurality of scrapers are fixed to the rotating supporting shaft, and the scrapers make contact with the baffle plates. The oil separator has the advantages that when gas flows through the rotating fan, the rotating fan rotates to enable the rotating supporting shaft to swing, the rotating supporting shaft swings to drive the scraping plate to move, oil drops on the baffle plates are collected, carbon dioxide is difficult to take away the collected oil drops, and therefore the separation efficiency of the oil separator is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of carbon dioxide refrigeration systems, in particular to an oil separator for a carbon dioxide refrigeration system. Background Technique

[0002] As a natural refrigerant, carbon dioxide has been highly regarded in the past 20 years due to its excellent environmental protection performance and refrigeration performance. Its research and development have made rapid progress. Due to the impact of CFCs on the ozone layer and global warming, in response to the industry concept of green development, refrigeration devices using carbon dioxide as a refrigerant have gradually become an industry trend. In the development of carbon dioxide refrigeration systems in the transcritical state, the requirements for each component in the system have been correspondingly improved. As an important part of the system, the oil separator is related to the oil return state of the entire system.

[0003] For example, the patent document with the publication number CN218120281U discloses an oil separator for a carbon dioxide refrigeration system, including a main body frame. A first partition is provided on the inner wall of the main body frame, and a communication hole is opened on the outer wall at the lower end of the first partition. A bottom plate is provided on the inner wall at the lower end of the main body frame; the gas can be decelerated through the communication hole. By the principle of reducing the air flow rate, the oil particles in the high-pressure carbon dioxide can be separated under the action of gravity. The baffle plates are distributed alternately in the main body frame. Through the baffle plates, the gas can be deflected when flowing in the main body frame. By the principle of deflecting the air, the oil particles in the high-pressure carbon dioxide can be separated under the action of gravity. The oil generated in the main body frame flows through the equipment hole on the bottom plate into the communication pipe. By regularly opening the valve, the oil in the communication pipe can be collected and reused, saving materials, reducing the oil discharge in the gas, and protecting the environment. The above device uses the baffle flow method to complete the separation of carbon dioxide gas and oil liquid. However, since the air flow rate is greater than the oil liquid flow rate, when the oil liquid accumulates on the baffle plate and the inner wall of the separator, there is a situation where the carbon dioxide gas re-lifts the oil liquid and returns to the gas-liquid mixed state, reducing the separation efficiency. Content of the Utility Model

[0004] The purpose of the utility model is to provide an oil separator for a carbon dioxide refrigeration system to solve the above problems.

[0005] The utility model realizes the above purpose through the following technical solutions:

[0006] An oil separator for a carbon dioxide refrigeration system, comprising a separator main body. A cooling mechanism is arranged at the center of the separator main body. A scraping mechanism is arranged inside the separator main body. An oil collection chamber is arranged below the scraping mechanism. The separator main body includes a separation outer shell. A cooling chamber is arranged at the center inside the separation outer shell. An air inlet chamber is arranged on one side of the cooling chamber. An air outlet chamber is arranged on the other side of the cooling chamber. A plurality of baffle plates are fixedly connected inside both the air inlet chamber and the air outlet chamber. The scraping mechanism includes a gear bearing box fixedly connected to the bottom of the separation outer shell. A first gear is rotatably connected inside the gear bearing box. Symmetrically arranged second gears are engaged on both sides of the first gear. The second gears are rotatably connected to the gear bearing box. A sector gear is fixedly connected concentrically at the top of the second gear. The two sector gears are arranged in the same direction. The sector gear can be engaged with a double-sided rack. The double-sided rack is slidably connected to the gear bearing box. Symmetrically arranged telescopic connecting rods are rotatably connected to the double-sided rack. The other end of the telescopic connecting rod is fixedly connected to a rotating support shaft. A plurality of uniformly arranged first scrapers are fixedly connected to the rotating support shaft arranged inside the air inlet chamber. A plurality of uniformly arranged second scrapers are fixedly connected to the rotating support shaft arranged inside the air outlet chamber. The upper end of the rotating support shaft is rotatably connected to the separation outer shell. The lower end of the rotating support shaft is rotatably connected to the gear bearing box.

[0007] Preferably, a separation partition is fixedly connected to the lower side of the gear bearing box. A transmission shaft is rotatably connected in the middle of the separation partition. A rotating fan is fixedly connected to the transmission shaft. The upper end of the transmission shaft is fixedly connected to the first gear. The first scraper is arranged in an L shape facing upward and is used to collect the oil liquid on the upper side of the baffle plate in the air inlet chamber and the inner wall of the separation outer shell. The second scraper is arranged in an L shape facing downward and is used to collect the oil liquid on the lower side of the baffle plate in the air outlet chamber and the inner wall of the separation outer shell.

[0008] Preferably, a separation chamber end cover is fixedly connected to the top of the separation outer shell. An air inlet pipe is fixedly connected to the separation chamber end cover. The other end of the separation chamber end cover is fixedly connected to an air outlet pipe. The air inlet pipe is arranged at the upper part of the air inlet chamber. The air outlet pipe is arranged at the upper part of the air outlet chamber. Symmetrically arranged first handles are fixedly connected to both sides of the separation outer shell. Notches are arranged on the baffle plates. The notches on the baffle plates are arranged staggeredly on adjacent two baffle plates.

[0009] Preferably, the cooling mechanism includes the outer wall of the separation chamber slidably connected in the cooling chamber. A cooling partition is fixedly connected inside the outer wall of the separation chamber. A cooling chamber end cover is fixedly connected to the top of the outer wall of the separation chamber. A liquid outlet pipe is arranged at the front end of the cooling chamber end cover. A liquid inlet pipe is arranged at the rear end of the cooling chamber end cover. A second handle is arranged between the liquid outlet pipe and the liquid inlet pipe. The second handle is fixedly connected to the cooling chamber end cover.

[0010] Preferably, the oil collection chamber includes an oil storage chamber fixedly connected to the bottom of the separation outer shell. An oil outlet pipe is arranged on one side of the oil storage chamber. A baffle is arranged inside the oil storage chamber. The upper end of the baffle is fixedly connected to the bottom of the separation partition. Both sides of the baffle are set as slopes.

[0011] Preferably, a control valve is externally connected to the oil outlet pipe.

[0012] The beneficial effects are as follows: When gas flows through the rotating fan, the rotating fan rotates, causing the rotating support shaft to swing. The swinging of the rotating support shaft drives the scraper to move, collecting the oil droplets on the baffle plate. It is difficult for carbon dioxide to carry away the collected oil droplets, thus improving the separation efficiency of the oil separator.

[0013] The additional technical features and their advantages of the present invention will be more clearly described in the following description content, or can be understood through the specific practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention, but do not constitute a limitation to the present invention. In the drawings:

[0015] Figure 1 is a perspective view of an oil separator for a carbon dioxide refrigeration system according to the present invention;

[0016] Figure 2 is a front cross-sectional view of an oil separator for a carbon dioxide refrigeration system according to the present invention;

[0017] Figure 3 is a schematic structural view of a baffle plate of an oil separator for a carbon dioxide refrigeration system according to the present invention;

[0018] Figure 4 is a schematic structural view of a scraper mechanism of an oil separator for a carbon dioxide refrigeration system according to the present invention;

[0019] Figure 5 is a schematic structural view of a transmission shaft of an oil separator for a carbon dioxide refrigeration system according to the present invention;

[0020] Figure 6 is a schematic structural view of an oil collection chamber of an oil separator for a carbon dioxide refrigeration system according to the present invention.

[0021] The description of the reference numerals is as follows:

[0022] 101. Separation chamber end cover; 102. Inlet pipe; 103. Outlet pipe; 104. First handle; 105. Separation chamber housing; 106. Baffle plate; 201. Liquid inlet pipe; 202. Liquid outlet pipe; 203. Second handle; 204. Cooling chamber end cover; 205. Outer wall of separation chamber; 206. Cooling partition; 301. Oil storage chamber; 302. Oil outlet pipe; 303. Shading plate; 401. Gear bearing box; 402. Separation partition; 403. Rotating fan; 404. Transmission shaft; 405. First gear; 406. Second gear; 407. Sector gear; 408. Double-sided rack; 409. Telescopic connecting rod; 410. Rotating support shaft; 411. First scraper; 412. Second scraper. Detailed implementation manners

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0024] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0025] The present invention will be further described below in conjunction with the accompanying drawings:

[0026] As Figures 1-6As shown in the figure, an oil separator for a carbon dioxide refrigeration system includes a separator main body. A cooling mechanism is arranged at the center of the separator main body. A scraping mechanism is arranged inside the separator main body. An oil collection chamber is arranged below the scraping mechanism. The separator main body includes a separation outer shell 105. A cooling chamber is arranged at the center inside the separation outer shell 105. An air inlet chamber is arranged on one side of the cooling chamber. An air outlet chamber is arranged on the other side of the cooling chamber. A plurality of baffle plates 106 are fixedly connected inside both the air inlet chamber and the air outlet chamber. The scraping mechanism includes a gear bearing box 401 fixedly connected to the bottom of the separation outer shell 105. A first gear 405 is rotatably connected inside the gear bearing box 401. Symmetrically arranged second gears 406 are meshed on both sides of the first gear 405. The second gears 406 are rotatably connected to the gear bearing box 401. A sector gear 407 is fixedly connected concentrically to the top of the second gear 406. The two sector gears 407 are arranged in the same direction. The sector gear 407 can be meshed with a double-sided rack 408. The double-sided rack 408 is slidably connected to the gear bearing box 401. Symmetrically arranged telescopic connecting rods 409 are rotatably connected to the double-sided rack 408. The other end of the telescopic connecting rod 409 is fixedly connected to a rotating support shaft 410. A plurality of uniformly arranged first scraping plates 411 are fixedly connected to the rotating support shaft 410 arranged inside the air inlet chamber. A plurality of uniformly arranged second scraping plates 412 are fixedly connected to the rotating support shaft 410 arranged inside the air outlet chamber. The upper end of the rotating support shaft 410 is rotatably connected to the separation outer shell 105. The lower end of the rotating support shaft 410 is rotatably connected to the gear bearing box 401. A separation partition plate 402 is fixedly connected below the gear bearing box 401. A transmission shaft 404 is rotatably connected in the middle of the separation partition plate 402. A rotating fan 403 is fixedly connected to the transmission shaft 404. The upper end of the transmission shaft 404 is fixedly connected to the first gear 405. The first scraping plate 411 is arranged in an L shape facing upward, and is used for collecting the oil liquid on the upper side of the baffle plate 106 and the inner wall of the separation outer shell 105 in the air inlet chamber. The second scraping plate 412 is arranged in an L shape facing downward, and is used for collecting the oil liquid on the lower side of the baffle plate 106 and the inner wall of the separation outer shell 105 in the air outlet chamber. The rotating fan 403 rotates driven by the carbon dioxide gas flow, driving the transmission shaft 404 to rotate. The transmission shaft 404 rotates to drive the first gear 405 to rotate. The first gear 405 rotates to drive the second gears 406 on both sides to rotate. The second gears 406 rotate to drive the sector gears 407 to rotate synchronously. The sector gears 407 rotate to drive the double-sided rack 408 to rotate. Due to the same-direction arrangement of the sector gears 407, the double-sided rack 408 can only be meshed with one of the sector gears 407 at the same time. In this way, the double-sided rack 408 can perform a linear reciprocating motion. The reciprocating motion of the double-sided rack 408 drives the telescopic connecting rod 409 to move. The movement of the telescopic connecting rod 409 drives the rotating support shaft 410 to swing. The swing of the rotating support shaft 410 drives the first scraping plate 411 and the second scraping plate 412 to swing, thereby gathering the fine oil droplets on the baffle plate 106 and the inner wall of the separation outer shell 105, making it difficult for the carbon dioxide gas flow to carry them away. In addition,The pushing of the scraper is faster than that of only using gravity to collect the oil liquid, which improves the separation efficiency of oil separation.

[0027] A separation chamber end cover 101 is fixedly connected to the top of the separation chamber outer shell 105. An intake pipe 102 is fixedly connected to the separation chamber end cover 101. The other end of the separation chamber end cover 101 is fixedly connected to an outlet pipe 103. The intake pipe 102 is arranged in the upper part of the intake cavity, and the outlet pipe 103 is arranged in the upper part of the outlet cavity. Symmetrically arranged first handles 104 are fixedly connected to both sides of the separation chamber outer shell 105. The baffle 106 is provided with a notch, and the notches on the baffle 106 are arranged staggeredly on adjacent baffles 106. The high-temperature and high-pressure carbon dioxide and oil droplet mixed gas enters the oil separator from the intake pipe 102. Through the setting of the intake cavity and the outlet cavity, the travel of the gas in the separator is increased. Through the setting of a number of baffles 106, the gas constantly changes direction during the flow process. Since the turning ability of the oil droplets is weaker than that of the gas, the oil droplets adhere to the baffle 106. Subsequently, under the action of the scraper mechanism, the oil liquid is collected and enters the collection chamber. The carbon dioxide gas that has completed the oil separation leaves the oil separator from the outlet pipe 103. The setting of the first handle 104 facilitates the handling and movement of the oil separator by the staff.

[0028] The cooling mechanism includes a separation chamber outer wall 205 slidably connected in the cooling cavity. A cooling partition 206 is fixedly connected inside the separation chamber outer wall 205. A cooling chamber end cover 204 is fixedly connected to the top of the separation chamber outer wall 205. A liquid outlet pipe 202 is arranged at the front end of the cooling chamber end cover 204, and a liquid inlet pipe 201 is arranged at the rear end of the cooling chamber end cover 204. A second handle 203 is arranged between the liquid outlet pipe 202 and the liquid inlet pipe 201, and the second handle 203 is fixedly connected to the cooling chamber end cover 204. Water with a lower temperature enters the cooling mechanism from the liquid inlet pipe 201, and the gas is continuously cooled by heat transfer, reducing the temperature of the discharged carbon dioxide and preventing the discharged high-temperature carbon dioxide from heating the surrounding environment, thus protecting the surrounding environmental temperature.

[0029] The oil collection chamber includes an oil storage chamber 301 fixedly connected to the bottom of the separation chamber outer shell 105. An oil outlet pipe 302 is arranged on one side of the oil storage chamber 301. A baffle 303 is arranged inside the oil storage chamber 301. The upper end of the baffle 303 is fixedly connected to the bottom of the separation partition 402. The two sides of the baffle 303 are set as slopes. A control valve is externally connected to the oil outlet pipe 302. The collected oil liquid drops onto the baffle 303. The slope setting on the baffle 303 facilitates the collection of oil droplets into the oil storage chamber 301. At the same time, the setting of the baffle 303 is beneficial to blocking the carbon dioxide gas from entering the oil storage chamber 301. The collected oil liquid leaves the oil separator through the oil outlet pipe 302.

[0030] Working principle: The mixed gas of high-temperature and high-pressure carbon dioxide and oil droplets enters the oil separator from the intake pipe 102. Through the setting of the intake cavity and the outlet cavity, the travel of the gas during the separation period is increased. Through the setting of a number of baffle plates 106, the gas continuously changes direction during the flow process. By utilizing the fact that the turning ability of oil droplets is weaker than that of the gas, the oil droplets adhere to the baffle plates 106. The rotating fan 403 rotates under the push of the carbon dioxide gas flow, driving the transmission shaft 404 to rotate. The rotation of the transmission shaft 404 drives the first gear 405 to rotate. The rotation of the first gear 405 drives the second gears 406 on both sides to rotate. The rotation of the second gears 406 drives the sector gears 407 to rotate synchronously. The rotation of the sector gears 407 drives the double-sided racks 408 to rotate. Due to the same-direction setting of the sector gears 407, the double-sided racks 408 can only engage with one of the sector gears 407 at the same time. In this way, the double-sided racks 408 can perform linear reciprocating motion. The reciprocating motion of the double-sided racks 408 drives the telescopic connecting rod 409 to move. The movement of the telescopic connecting rod 409 drives the rotating support shaft 410 to swing. The swing of the rotating support shaft 410 drives the first scraper 411 and the second scraper 412 to swing, thereby converging the fine oil droplets on the inner walls of the baffle plates 106 and the separator outer shell 105, making it difficult for the carbon dioxide gas flow to carry them away. In addition, the pushing of the scraper is faster than only collecting the oil liquid by gravity, improving the separation efficiency of oil separation. The carbon dioxide gas that has completed oil separation leaves the oil separator from the outlet pipe 103. While oil separation is being carried out, the relatively cold water enters the cooling mechanism from the liquid inlet pipe 201, and continuously cools the gas by heat transfer, reducing the temperature of the discharged carbon dioxide and preventing the discharged high-temperature carbon dioxide from heating the surrounding environment, protecting the surrounding environmental temperature. The collected oil liquid drops onto the baffle plate 303. The slope setting on the baffle plate 303 facilitates the collection of oil droplets into the oil storage chamber 301. At the same time, the setting of the baffle plate 303 helps to block the carbon dioxide gas from entering the oil storage chamber 301. The collected oil liquid leaves the oil separator through the oil outlet pipe 302.

[0031] The above shows and describes the basic principles, main features and advantages of the present utility model. Those skilled in the art of this industry should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed.

Claims

1. An oil separator for a carbon dioxide refrigeration system, comprising a separator body, characterized in that: A cooling mechanism is arranged at the center of the separator body, a scraper mechanism is arranged inside the separator body, an oil collection chamber is arranged at the lower side of the scraper mechanism, the separator body comprises a separation chamber shell (105), a cooling cavity is arranged at the center of the separation chamber shell (105), an air inlet cavity is arranged on one side of the cooling cavity, an air outlet cavity is arranged on the other side of the cooling cavity, a plurality of baffles (106) are fixedly connected inside the air inlet cavity and the air outlet cavity, the scraper mechanism comprises a gear bearing box (401) fixedly connected to the bottom of the separation chamber shell (105), a first gear (405) is rotatably connected inside the gear bearing box (401), second gears (406) symmetrically arranged are meshed on both sides of the first gear (405), the second gear (406) is rotatably connected to the gear bearing box (401), and the top of the second gear (406) is concentrically fixedly connected to A sector gear (407), the two sector gears (407) are arranged in the same direction, the sector gear (407) can mesh with the double-sided rack (408), the double-sided rack (408) is slidably connected to the gear carrier box (401), the double-sided rack (408) is rotatably connected with a symmetrically arranged telescopic link (409), the other end of the telescopic link (409) is fixedly connected with a rotating support shaft (410), the rotating support shaft (410) arranged inside the air inlet chamber is fixedly connected with a plurality of uniformly arranged first scrapers (411), the rotating support shaft (410) arranged inside the air outlet chamber is fixedly connected with a plurality of uniformly arranged second scrapers (412), the upper end of the rotating support shaft (410) is rotatably connected to the separation chamber shell (105), and the lower end of the rotating support shaft (410) is rotatably connected to the gear carrier box (401).

2. The oil separator for a carbon dioxide refrigeration system according to claim 1, characterized in that: A separation baffle (402) is fixedly connected to the lower side of the gear carrier box (401), a transmission shaft (404) is rotatably connected in the middle of the separation baffle (402), a rotating fan (403) is fixedly connected to the transmission shaft (404), a first gear (405) is fixedly connected to the upper end of the transmission shaft (404), the first scraper (411) is arranged in an upward L-shape for collecting oil on the upper side of the baffle (106) in the air inlet cavity and the inner wall of the separation chamber shell (105), and the second scraper (412) is arranged in a downward L-shape for collecting oil on the lower side of the baffle (106) in the air outlet cavity and the inner wall of the separation chamber shell (105).

3. The oil separator for a carbon dioxide refrigeration system according to claim 1, characterized in that: The separation chamber end cover (101) is fixedly connected to the top of the separation chamber shell (105), the separation chamber end cover (101) is fixedly connected to an air inlet pipe (102), the other end of the separation chamber end cover (101) is fixedly connected to an air outlet pipe (103), the air inlet pipe (102) is arranged at the upper part of the air inlet cavity, the air outlet pipe (103) is arranged at the upper part of the air outlet cavity, and the two sides of the separation chamber shell (105) are fixedly connected to symmetrically arranged first handles (104), the baffle (106) is provided with notches, and the notches on the baffle (106) are staggered on two adjacent baffles (106).

4. The oil separator for a carbon dioxide refrigeration system according to claim 1, characterized in that: The cooling mechanism comprises an outer wall (205) of a separation chamber slidably connected to the cooling chamber, a cooling baffle (206) being fixedly connected inside the outer wall (205) of the separation chamber, a cooling chamber end cover (204) being fixedly connected to the top of the outer wall (205) of the separation chamber, a liquid outlet pipe (202) being arranged at the front end of the cooling chamber end cover (204), a liquid inlet pipe (201) being arranged at the rear end of the cooling chamber end cover (204), a second handle (203) being arranged between the liquid outlet pipe (202) and the liquid inlet pipe (201), and the second handle (203) being fixedly connected to the cooling chamber end cover (204).

5. The oil separator for a carbon dioxide refrigeration system according to claim 2, characterized in that: The oil collection chamber comprises an oil storage chamber (301) fixedly connected to the bottom of the separation chamber housing (105), an oil outlet pipe (302) is arranged on one side of the oil storage chamber (301), a baffle plate (303) is arranged inside the oil storage chamber (301), the upper end of the baffle plate (303) is fixedly connected to the bottom of the separation partition (402), and both sides of the baffle plate (303) are arranged as slopes.

6. The oil separator for a carbon dioxide refrigeration system according to claim 5, characterized in that: The oil outlet pipe (302) is externally connected to a control valve.

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