Oil separator structure of refrigeration equipment

Abstract

The utility model provides an oil separator structure of refrigeration equipment, which relates to the technical field of refrigeration accessories and comprises an oil separator body, an air outlet pipe is connected onto the oil separator body, and a filtering and separating mechanism is mounted on the air outlet pipe. The filtering and separating mechanism comprises a mounting screen drum fixed to the upper end cover, a framework screen drum, a filter element and a rotating assembly, a plurality of oil scraping strips are arranged on the bottom wall of the mounting screen drum and abut against the outer wall of the filter element in a sliding mode, and the rotating assembly comprises a rotating ring piece, a guide sliding rod, a sliding plug piece and a supporting spring. A positioning ring is arranged at the lower end of the air outlet pipe, the sliding plug piece abuts against and blocks the upper side of the positioning ring, a plurality of rotating grooves are formed in the outer edge of the rotating ring piece, and spiral protruding strips are arranged on the inner wall of the framework screen drum and penetrate through the rotating grooves in a sliding mode. The rotary assembly is pushed to slide through the front and back pressure difference of the air outlet pipe, so that oil drops on the filter element are scraped through the rotation of the oil scraping strip.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigeration accessories, in particular to an oil separator structure of a refrigeration device. Background Art

[0002] As an important component of an air-conditioning system, the oil separator is located between the compressor outlet and the condenser inlet, and can separate the lubricating oil in the high-pressure gaseous refrigerant discharged by the compressor, reducing the influence of the lubricating oil on the heat exchange efficiency of the refrigerant in the refrigeration system.

[0003] The high-temperature and high-pressure gaseous refrigerant reduces its speed and changes direction in the oil separator. Under the action of centrifugal force, the lubricating oil mixed in the gas can be separated to form droplets attached to the inner wall of the oil separator for preliminary separation. Then, the lubricating oil is further filtered onto the filter screen through the filter screen. Under the action of the gravity of the oil droplets themselves in a high-temperature environment, the oil droplets fall on the filter screen and converge into large oil droplets, which then fall back to the bottom of the oil separator and are concentrated and returned to the compressor. However, after the air conditioner is turned off and the compressor stops working, the temperature in the oil separator drops rapidly. The oil droplets attached to the filter screen increase their viscosity in the low-temperature state and adhere to the filter screen under the action of surface tension, blocking the filter holes and gradually deteriorating to form oil stains. As time goes by, more and more oil stains will adhere to the filter screen, causing the filter screen to be blocked and the external pressure of the filter element to be too large, flattening the filter element and damaging the oil separator. Summary of the Utility Model

[0004] (1) Technical Problems to be Solved

[0005] In view of the deficiencies of the prior art, the utility model provides an oil separator structure of a refrigeration device, which solves the problems put forward in the above background art.

[0006] (2) Technical Solutions

[0007] To achieve the above purposes, the utility model is realized through the following technical solutions:

[0008] An oil separator structure of a refrigeration device includes an oil separator body. The oil separator body includes a cylinder body, an upper end cover and a lower end cover welded to the upper and lower ends of the cylinder body respectively. An air inlet pipe is connected to the side wall of the cylinder body, an air outlet pipe is connected to the upper end cover, and an oil outlet pipe is connected to the lower end cover. A filtering and separating mechanism is installed on the upper end cover. The filtering and separating mechanism includes an installation sieve cylinder fixed on the upper end cover, a skeleton sieve cylinder rotatably penetrating through the inside of the installation sieve cylinder, a filter element fixed on the skeleton sieve cylinder, and a rotating assembly connected between the skeleton sieve cylinder and the upper end cover. A plurality of oil scraping bars are arranged on the bottom wall of the installation sieve cylinder, and the oil scraping bars slidably abut against the outer wall of the filter element.

[0009] Preferably, the rotating assembly includes a rotating ring plate, a guiding slide bar, a sliding plug piece and a supporting spring. A positioning ring is arranged at the lower end of the air outlet pipe. An air hole is arranged in the middle of the positioning ring. The sliding plug piece abuts against and seals the upper side of the air hole. The guiding slide bar is fixed at the top of the guiding slide bar. The guiding slide bar slidably penetrates through the positioning ring. The rotating ring plate is fixed at the lower end of the guiding slide bar. A plurality of rotating grooves are formed in the outer edge of the rotating ring plate. Spiral ridges are arranged on the inner wall of the skeleton sieve tube. The spiral ridges slidably penetrate through the rotating grooves. The supporting spring abuts between the rotating ring plate and the positioning ring. The supporting spring is sleeved on the guiding slide bar.

[0010] Preferably, a communicating groove hole is arranged on the rotating ring plate.

[0011] Preferably, the diameter of the sliding plug piece is smaller than the inner diameter of the air outlet pipe. A rubber pad is arranged on the lower side of the sliding plug piece. The rubber pad abuts against and blocks the upper edge of the air hole.

[0012] Preferably, the skeleton sieve tube includes a positioning sieve tube abutting against the inner wall of the filter core, a mounting piece fixed at the upper end of the positioning sieve tube, and a plurality of skeleton rods fixed on the mounting piece and extending downward. The skeleton rods penetrate through the filter core. A fixing flange is arranged on the upper side of the mounting sieve tube. An installation groove is arranged on the fixing flange. The mounting piece is rotationally connected in the installation groove in a concave-convex fit manner.

[0013] Preferably, the oil scraping strip is spirally arranged on the inner wall of the mounting sieve tube.

[0014] Preferably, a floating ball assembly is arranged at the end of the oil outlet pipe. The floating ball assembly includes a connecting block, a blocking slide bar, a floating ball piece and a switch floating ball. The connecting block includes a blocking part, a connecting part and a sliding part integrally formed. The blocking part is fixed at the end of the oil outlet pipe. The blocking part is provided with an oil outlet hole communicated with the oil outlet pipe. The blocking slide bar is slidably connected to the sliding part. The upper end of the blocking slide bar abuts against and seals the oil outlet hole. The middle part of the floating ball piece is hinged to the lower end of the connecting part. A lifting groove hole is arranged at the lower end of the blocking slide bar. The lower end of the floating ball piece is rotationally connected to the lifting groove hole. The switch floating ball is fixed on the upper end of the floating ball piece.

[0015] (III) Beneficial effects

[0016] The utility model provides an oil separator structure of a refrigeration device. The following beneficial effects are achieved:

[0017] 1. In the present utility model, the pressure change inside the oil separator during the process of turning on and off the air conditioner can cause the rotating assembly to slide up and down on the positioning ring of the oil outlet pipe. In this way, the rotating groove and the spiral rib that are slidably connected to each other interact, causing the skeleton sieve tube to drive the filter element to rotate relative to the installation sieve tube. The small oil droplets on the surface of the filter element are scraped by the oil scraping strip, causing the small oil droplets to aggregate into large oil droplets, making it easier for the oil droplets to quickly slide off the outer wall of the filter element, and avoiding the oil droplets remaining after the temperature drops from forming oil stains and causing blockage of the filter element. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of an oil separator structure of a refrigeration device according to the present utility model;

[0019] Figure 2 is a schematic structural diagram of the filtering and separating mechanism in the present utility model;

[0020] Figure 3 is a schematic structural diagram of the installation sieve tube in the present utility model;

[0021] Figure 4 is a schematic structural diagram of the rotating assembly in the present utility model;

[0022] Figure 5 is a schematic structural diagram of the float assembly in the present utility model.

[0023] In the figure: 1, cylinder body; 2, intake pipe; 3, outlet pipe; 4, oil outlet pipe; 5, installation sieve tube; 6, skeleton sieve tube; 7, filter element; 8, oil scraping strip; 9, rotating ring plate; 10, guiding slide bar; 11, sliding plug piece; 12, supporting spring; 13, spiral rib; 14, connecting block; 15, blocking slide bar; 16, float piece; 17, switch float. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model.

[0025] The embodiment of the present utility model provides an oil separator structure of a refrigeration device,

[0026] Such as Figure 1As shown, it includes an oil separator body. The oil separator body includes a cylinder body 1, an upper end cover and a lower end cover welded to the upper and lower ends of the cylinder body 1. An air inlet pipe 2 is connected to the side wall of the cylinder body 1, an air outlet pipe 3 is connected to the upper end cover, and an oil outlet pipe 4 is connected to the lower end cover. A filtering and separating mechanism is installed on the upper end cover. The filtering and separating mechanism includes a mounting sieve cylinder 5 fixed on the upper end cover, a skeleton sieve cylinder 6 rotatably penetrating through the inside of the mounting sieve cylinder 5, a filter core 7 fixed on the skeleton sieve cylinder 6, and a rotating assembly connected between the skeleton sieve cylinder 6 and the upper end cover. The installation height of the air inlet pipe 2 is directly opposite to the middle position of the mounting sieve cylinder 5. The high-temperature and high-pressure refrigerant decelerates and turns inside the oil separator body, and the oil droplets are separated from the supporting gas through centrifugal force by the inertia difference between the refrigerant gas and the oil droplets, adhere to the inner wall of the oil separator body, flow downward along the inner wall of the oil separator body to the bottom of the oil separator body to gather. At the same time, the refrigerant gas and the oil droplets are filtered through the mounting sieve cylinder 5 and the filter core 7 to filter and separate the oil droplets in the refrigerant gas.

[0027] As Figure 2 , 3 shown, a plurality of oil scraping bars 8 are provided on the bottom wall of the mounting sieve cylinder 5. The oil scraping bars 8 are spirally arranged on the inner wall of the mounting sieve cylinder 5. The oil scraping bars 8 slide and abut against the outer wall of the filter core 7. When the spirally arranged oil scraping bars 8 rotate and scrape the outer wall of the filter core 7, the oil droplets can be gathered and pushed downward at the same time, strengthening the dripping effect of the oil droplets.

[0028] As Figure 2 , 4As shown, the rotating assembly includes a rotating ring piece 9, a guide slide bar 10, a sliding plug piece 11 and a supporting spring 12. The rotating ring piece 9 is provided with a connecting slot hole. The lower end of the air outlet pipe 3 is provided with a positioning ring. The middle part of the positioning ring is provided with an air hole. The diameter of the sliding plug piece 11 is smaller than the inner diameter of the air outlet pipe 3. A rubber pad is provided on the lower side of the sliding plug piece 11. The rubber pad abuts and blocks the upper edge of the air hole. The guide slide bar 10 is fixed on the top of the guide slide bar 10. The guide slide bar 10 is slidably penetrated on the positioning ring. The rotating ring piece 9 is fixed on the lower end of the guide slide bar 10. The outer edge of the rotating ring piece 9 is provided with a plurality of rotating grooves. The inner wall of the skeleton screen drum 6 is provided with The spiral ridge 13 is slidably inserted into the rotating groove, and the support spring 12 is in contact between the rotating ring piece 9 and the positioning ring. The support spring 12 is sleeved on the guide slide rod 10. During the opening and closing process of the air conditioner, the pressure difference between the oil separator body and the rear side of the outlet pipe 3 changes, and the sliding plug 11 is pushed to slide in the oil outlet pipe 4 to achieve the connection and closure of the positioning upper air hole, so that the rotating component slides up and down as a whole. Through the action of the rotating ring piece 9 sliding up and down, the skeleton screen drum 6 rotates relative to the rotating ring piece 9, so that the filter element 7 and the oil scraper strip 8 slide relative to each other, scraping the oil droplets on the outer wall of the filter element 7 to avoid the accumulation of oil droplets on the filter element 7 and causing the filter element 7 to be blocked.

[0029] like Figure 2 As shown, the skeleton screen cylinder 6 includes a positioning screen cylinder that abuts against the inner wall of the filter element 7, a mounting plate fixed to the upper end of the positioning screen cylinder, and a plurality of skeleton rods fixed to the mounting plates and extending downward, the skeleton rods are passed through the filter element 7, a fixing flange is provided on the upper side of the mounting screen cylinder 5, a mounting groove is provided on the fixing flange, the mounting plate is rotatably connected in the mounting groove by a concave-convex fitting, the filter element 7 can be fixed to the skeleton screen cylinder 6 by the skeleton rods, and the rotation of the filter element 7 can be realized by rotating the positioning screen cylinder.

[0030] like Figure 1 , 5As shown in the figure, the oil outlet pipe 4 is arranged in an inverted U shape, and a floating ball assembly is arranged at the end of the oil outlet pipe 4. The floating ball assembly includes a connecting block 14, a plugging slide rod 15, a floating ball piece 16 and a switch floating ball 17. The connecting block 14 includes a plugging part, a connecting part and a sliding part integrally formed. The plugging part is fixed at the end of the oil outlet pipe 4. The plugging part is provided with an oil outlet hole communicating with the oil outlet pipe 4. The plugging slide rod 15 is slidably connected to the sliding part. The upper end of the plugging slide rod 15 abuts and plugs the oil outlet hole. The middle part of the floating ball piece 16 is hinged to the lower end of the connecting part. The lower end of the plugging slide rod 15 is provided with a lifting groove hole. The lower end of the floating ball piece 16 is rotatably connected to the lifting groove hole. The switch floating ball 17 is fixed to the upper end of the floating ball piece 16. When the depth of the filtered oil in the oil separator body increases, the switch floating ball 17 can float. By the rotation and hinge of the floating ball piece 16, the plugging slide rod 15 slides down and disengages from the oil outlet hole, so that the oil outlet pipe 4 is communicated with the lubricating oil, which is convenient for the automatic extraction of the lubricating oil.

[0031] Working principle:

[0032] In the present utility model, in the air-conditioning system, when it is in the closed state, the pressures before and after the air outlet pipe 3 are balanced. Under the action of the support spring 12, the sliding plug piece 11 blocks the air hole. The rotating ring piece 9 is located below the inner wall of the skeleton sieve tube 6, and the rotating groove and the spiral rib 13 are in concave-convex fit;

[0033] When the air conditioner is turned on, the compressor works, and the refrigerating gas is continuously injected into the oil separator body. The pressure in the oil separator body gradually increases. Due to the blockage of the sliding plug piece 11 in the air outlet pipe 3, the pressure in the oil separator body is gradually higher than the pressure at the rear side of the air outlet pipe 3. The sliding plug piece 11 is pushed by the pressure difference, so that the whole rotating assembly rises. Due to the limiting effect of the guiding slide rod 10, the rotating assembly can only slide up and down. The relative sliding of the rotating groove and the spiral rib 13 can make the whole skeleton sieve tube 6 rotate, and the oil scraping strip 8 rotates relative to the outer wall of the filter element 7 to scrape the outside of the filter element 7 until the rotating ring piece 9 is located above the inner wall of the skeleton sieve tube 6;

[0034] After the air conditioner is turned off, the compressor stops working, and the refrigerating gas is no longer injected into the oil separator body. The pressures before and after the air outlet pipe 3 gradually balance. Under the action of the support spring 12, the rotating assembly slides down until the sliding plug piece 11 blocks the air hole. During this process, the relative sliding of the rotating groove and the spiral rib 13 can make the whole skeleton sieve tube 6 rotate, and the oil scraping strip 8 rotates relative to the outer wall of the filter element 7 to scrape the oil droplets outside the filter element 7, which can accelerate the aggregation and dripping of the oil droplets outside the filter element 7, and avoid the situation that the viscosity of the lubricating oil increases after the temperature drops and blocks the filter element 7, resulting in too large pressure difference inside and outside the filter separation mechanism when the air-conditioning system is turned on next time, causing the deformation of the filter element 7 and the failure of oil separation.

[0035] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. An oil separator structure for refrigeration equipment, comprising an oil separator body, the oil separator body comprising a cylinder and an upper end cover and a lower end cover welded to the upper and lower ends of the cylinder, an air inlet pipe is connected to the side wall of the cylinder, an air outlet pipe is connected to the upper end cover, and an oil outlet pipe is connected to the lower end cover, characterized in that: A filtering and separating mechanism is installed on the upper end cover, and the filtering and separating mechanism includes a mounting screen cylinder fixed on the upper end cover, a skeleton screen cylinder rotatably inserted into the mounting screen cylinder, a filter core fixed on the skeleton screen cylinder, and a rotating assembly connected between the skeleton screen cylinder and the upper end cover; a plurality of scraping strips are provided on the bottom wall of the mounting screen cylinder, and the scraping strips slide against the outer wall of the filter core.

2. The oil separator structure of a refrigeration equipment according to claim 1, characterized in that: The rotating assembly includes a rotating ring piece, a guide slide bar, a sliding plug piece and a supporting spring. A positioning ring is provided at the lower end of the air outlet pipe, an air hole is provided in the middle of the positioning ring, and the sliding plug piece is abutted and sealed on the upper side of the air hole. The guide slide bar is fixed to the top of the guide slide bar, and the guide slide bar is slidably penetrated on the positioning ring. The rotating ring piece is fixed to the lower end of the guide slide bar, and a plurality of rotating grooves are provided on the outer edge of the rotating ring piece. A spiral ridge is provided on the inner wall of the skeleton screen drum, and the spiral ridge is slidably penetrated in the rotating groove. The supporting spring is abutted between the rotating ring piece and the positioning ring, and the supporting spring is sleeved on the guide slide bar.

3. The oil separator structure of a refrigeration equipment according to claim 2, characterized in that: The rotating ring sheet is provided with a communicating slot hole.

4. The oil separator structure of a refrigeration equipment according to claim 3, characterized in that: The diameter of the sliding plug is smaller than the inner diameter of the air outlet pipe. A rubber pad is arranged on the lower side of the sliding plug, and the rubber pad abuts against and blocks the upper edge of the air hole.

5. The oil separator structure of a refrigeration equipment according to claim 4, characterized in that: The skeleton screen cylinder includes a positioning screen cylinder that abuts against the inner wall of the filter element, a mounting plate fixed to the upper end of the positioning screen cylinder, and a plurality of skeleton rods fixed to the mounting plate and extending downward, the skeleton rods are passed through the filter element, a fixing flange is provided on the upper side of the mounting screen cylinder, a mounting groove is provided on the fixing flange, and the mounting plate is rotatably connected in the mounting groove by concave-convex fitting.

6. The oil separator structure of a refrigeration equipment according to claim 5, characterized in that: The oil scraping spiral is arranged on the inner wall of the screen cylinder.

7. The oil separator structure of a refrigeration equipment according to claim 6, characterized in that: A float assembly is provided at the end of the oil outlet pipe, and the float assembly includes a connecting block, a sealing slide rod, a float sheet and a switch float. The connecting block includes an integrally formed sealing portion, a connecting portion and a sliding portion. The sealing portion is fixed to the end of the oil outlet pipe, and the sealing portion is provided with an oil outlet hole connected to the oil outlet pipe. The sealing slide rod is slidably connected to the sliding portion, and the upper end of the sealing slide rod is abutted and sealed on the oil outlet hole. The middle part of the float sheet is hinged at the lower end of the connecting portion, and a lifting slot hole is provided at the lower end of the sealing slide rod. The lower end of the float sheet is rotatably connected to the lifting slot hole, and the switch float is at the upper end of the float sheet.

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