Efficient oil separator with built-in cooling device

Abstract

The utility model relates to the technical field of refrigeration machinery, in particular to an efficient oil separator with a built-in cooling device. Comprising a cylinder body, an upper sealing plate, a lower sealing plate and an oil storage pipe which form a shell, as well as a layered rotational flow assembly, a baffle plate, a primary filter screen, a middle through pipe, a diffusion pipe, a filter screen fixing plate and a secondary filter screen which form an oil filtering system, and an oil cooling spiral coil pipe of an oil cooling device, a refrigerant inlet pipe, a refrigerant outlet pipe, a lubricating oil outlet, a cooling medium inlet and a cooling medium outlet; the upper sealing plate and the lower sealing plate are fixed to the upper end and the lower end of the barrel respectively. An oil separation system and an oil cooling device can be integrated, and high-temperature lubricating oil can be fully cooled while the efficient oil separation effect is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigeration machinery, in particular to a high-efficiency oil separator with a built-in cooling device. Background Art

[0002] Lubricating oil is an important auxiliary element that is indispensable in the operation of the compressor of the refrigeration unit. Many auxiliary system components are produced to meet its needs. The most common one is the oil separator, which plays an important role in separating the lubricating oil from the refrigerant and returning it to the compressor. Therefore, its ability to separate the lubricating oil is particularly critical; in addition, under relatively harsh working conditions, an oil cooler is often required to prevent the lubricating oil from gradually failing at high temperatures or even damaging the compressor; the current mainstream practice is to configure independent oil separators and oil coolers. The space available for placing components on the unit will be relatively tight, and the respective pipeline connections will also make the pipeline structure more complicated. Some oil separators with built-in cooling devices are difficult to take into account both oil separation and oil cooling effects. The combined cooling device weakens the oil separation effect. The combined cooling method is not effective and the lubricating oil is not sufficiently cooled. Therefore, the present application is proposed to integrate the oil separation system and the oil cooling device into one, while ensuring efficient oil separation effect, it can also achieve sufficient cooling of the high-temperature lubricating oil. Utility Model Content

[0003] The utility model provides a high-efficiency oil separator with a built-in cooling device, which has the beneficial effect of integrating an oil separation system with an oil cooling device, thereby ensuring a high-efficiency oil separation effect and achieving sufficient cooling of high-temperature lubricating oil.

[0004] A high-efficiency oil separator with a built-in cooling device, comprising a cylinder, an upper sealing plate, a lower sealing plate and an oil storage pipe constituting an outer shell, and a stratified swirl component, a baffle, a primary filter screen, an intermediate through pipe, a diffusion pipe, a filter screen fixing plate and a secondary filter screen constituting an oil filtering system, and an oil cooling spiral coil of the oil cooling device, as well as a refrigerant air inlet pipe, a refrigerant air outlet pipe, a lubricating oil outlet, a cooling medium inlet and a cooling medium outlet; the upper sealing plate and the lower sealing plate are respectively fixed at the upper and lower ends of the cylinder, and an oil storage pipe is arranged in the middle of the lower sealing plate, and the two filter screen fixing plates are fixed to the cylinder The inner wall of the cylinder is provided with a secondary filter screen fixed in two filter screen fixing plates, a baffle is provided on the inner wall of the cylinder, an intermediate through pipe is fixed in the middle of the baffle, a primary filter screen is fixed in the intermediate through pipe, a diffusion pipe is fixed on the upper end of the intermediate through pipe, and a stratified swirl assembly is provided on the baffle and is located outside the intermediate through pipe; a refrigerant air inlet pipe is fixed on the side wall of the cylinder, a refrigerant air outlet pipe is fixed on the upper sealing plate, a lubricating oil outlet is provided on the oil storage pipe, an oil cooling spiral coil is located in the oil storage pipe, and a cooling medium inlet and a cooling medium outlet are respectively fixed at both ends of the oil cooling spiral coil and pass through the cylinder;

[0005] The refrigerant inlet pipe opening is blocked by a baffle and a type I circular hole is opened on one side of the section located inside the cylinder, and the direction of the type I circular hole is the same as the swirl direction of the stratified swirl component.

[0006] The layered swirl assembly is composed of a plurality of swirl ribs evenly distributed and assembled, the plurality of swirl ribs are all fixed on the middle through pipe, and the outer sides of the plurality of swirl ribs are all in contact with the inner wall of the cylinder.

[0007] The baffle plate is provided with a plurality of type II circular holes, and the plurality of type II circular holes are all located below the layered cyclone assembly; the baffle plate is provided with a plurality of type III circular holes, and the plurality of type III circular holes are all located below the middle through pipe.

[0008] The outer side of the diffusion tube is in contact with the inner wall of the cylinder and is sealed, and the middle through tube and the diffusion tube divide the interior of the cylinder into an upper cavity and a lower cavity.

[0009] The first-level filter is a coarse-effect filter, and the second-level filter is a fine-effect filter.

[0010] The oil cooling spiral coil is a spiral coil structure, and the materials include copper and stainless steel.

[0011] The diameter of the type I circular hole is 3-5 mm.

[0012] The diameter of the type II circular hole is 8-12 mm.

[0013] The diameter of the III-type circular hole is 16-24 mm.

[0014] After adopting the above structure, the utility model has the following advantages compared with the prior art:

[0015] The oil separation system adopts a specially designed structural form and airflow organization method, and realizes efficient separation of lubricating oil through multiple separation steps; the oil cooling device uses a spiral coil heat exchanger, combined with the oil separator structure to meet the oil cooling needs. The refrigerant inlet pipe, baffle and diffuser structure design of the oil separator realize the multiple diffusion effect of the refrigerant airflow. By integrating the oil separator and oil cooler into one, the space occupied by components and installation work are reduced, while the overall complexity of the system is reduced and the material cost is reduced; the specially designed multiple oil separation system can ensure efficient oil separation effect; the spiral coil heat exchanger that can be deeply integrated with the oil separator structure is used as the oil cooling device to ensure that the lubricating oil can be fully cooled. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0017] Figure 1 It is the overall structure diagram of the utility model.

[0018] Figure 2 This is a structural diagram of the refrigerant inlet pipe of the utility model.

[0019] Figure 3 This is a structural diagram of the layered swirl component of the utility model.

[0020] Figure 4 This is a structural diagram of the baffle of the present utility model.

[0021] Figure 5 This is a structural diagram of the oil-cooling spiral coil of the utility model.

[0022] Figure 6 This is a schematic diagram of the refrigerant airflow organization of the utility model;

[0023] In the figure: cylinder 1; upper sealing plate 2; lower sealing plate 3; refrigerant inlet pipe 4; refrigerant outlet pipe 5; stratified swirl assembly 6; baffle 7; primary filter 8; middle through pipe 9; diffuser 10; filter fixing plate 11; secondary filter 12; oil storage pipe 13; lubricating oil outlet 14; oil cooling spiral coil 15; cooling medium inlet 16; cooling medium outlet 17; swirl rib 601. DETAILED DESCRIPTION

[0024] Example 1

[0025] like Figure 1 As shown, the utility model proposes a high-efficiency oil separator with a built-in cooling device, and its specific working process is as follows:

[0026] The high-temperature refrigerant gas from the unit compressor enters the oil separator from the refrigerant inlet pipe 4, completes a primary diffusion through the type I circular hole on the refrigerant inlet pipe 4, and then enters the lower cavity; under the action of speed inertia, the refrigerant gas begins to centrifugally rotate along the inner wall of the cylinder 1, and part of the lubricating oil is separated and flows down along the inner wall; at the same time, due to the dual effects of primary diffusion deceleration and gravity, the rotating airflow quickly begins to sink and enters the stratified cyclone component 6 more gently and evenly; the stratified cyclone component 6 further enhances the centrifugal oil separation effect by differentiating the airflow and limiting the flow, and the separated lubricating oil can also flow to the bottom of the oil separator along the inclined cyclone rib 601 and then through the baffle 7.

[0027] Furthermore, the refrigerant gas reaching the bottom of the stratified cyclone component 6 will undergo secondary diffusion when passing through the type II circular holes on the outer ring of the baffle 7. This can offset the rotational inertia speed of the airflow and avoid the vortex effect in the oil pool at the bottom of the oil separator; secondly, further deceleration and stabilization of the flow is beneficial to subsequent filter filtration.

[0028] Furthermore, the refrigerant gas at the bottom of the oil separator enters the intermediate passage 9 through the type III circular holes on the inner circle of the baffle 7, and undergoes coarse filtration by the primary filter 8 in the subsequent rising process, filtering out relatively large oil droplets; the larger aperture of the type III circular holes ensures uniform air flow into the intermediate passage 9 while ensuring that the separated lubricating oil can smoothly pass through the circular holes into the bottom of the oil separator even if the flow direction is opposite to that of the refrigerant.

[0029] Furthermore, after leaving the middle passage 9, the refrigerant gas begins to enter the upper cavity, diffuses three times along the diffusion tube 10, passes through the secondary filter 12 at the slowest flow rate in the entire process, filters out small-sized oil droplets, and finally leaves the oil separator through the refrigerant outlet pipe 5; the lubricating oil separated by the secondary filter 12 can flow down along the diffusion tube 10 and the inner wall of the middle passage 9 in turn, and finally enters the oil pool at the bottom of the oil separator.

[0030] On the other hand, before flowing out of the oil separator, the lubricating oil in the oil pool will first enter the oil storage pipe 13 at the bottom of the oil separator, and exchange heat with the cooling medium in the oil cooling spiral coil 15 for cooling; the oil storage pipe 13 with a smaller diameter is more suitable for the heat exchange structure of the oil cooling spiral coil 15 than the cylinder 1, and can more efficiently utilize its heat exchange area, thereby ensuring that the lubricating oil is fully cooled.

[0031] The examples described are only some examples of the present utility model, and the present embodiment is not used to limit the present utility model. All similar structures or similar changes of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A high-efficiency oil separator with a built-in cooling device, characterized in that: The invention comprises a cylinder (1) constituting an outer shell, an upper sealing plate (2), a lower sealing plate (3) and an oil storage pipe (13), as well as a stratified cyclone component (6), a baffle (7), a primary filter screen (8), an intermediate through pipe (9), a diffusion pipe (10), a filter screen fixing plate (11) and a secondary filter screen (12) constituting an oil filtering system, and an oil cooling spiral coil (15) of an oil cooling device, as well as a refrigerant air inlet pipe (4), a refrigerant air outlet pipe (5), a lubricating oil outlet (14), a cooling medium inlet (16) and a cooling medium outlet (17); the upper sealing plate (2) and the lower sealing plate (3) are respectively fixed to the upper and lower ends of the cylinder (1), and the middle part of the lower sealing plate (3) is provided with an oil storage pipe (13); the two filter screen fixing plates (11) are both fixed to the inner wall of the cylinder (1), and the secondary filter screen (12) is fixed to the inner wall of the cylinder (1). The cylinder (1) is provided with a plurality of filter screens (12) fixed in two filter screen fixing plates (11), a baffle (7) is arranged on the inner wall of the cylinder (1), an intermediate through pipe (9) is fixed in the middle of the baffle (7), a primary filter screen (8) is fixed in the intermediate through pipe (9), a diffusion pipe (10) is fixed at the upper end of the intermediate through pipe (9), and a layered swirl assembly (6) is arranged on the baffle (7) and is located outside the intermediate through pipe (9); a refrigerant inlet pipe (4) is fixed on the side wall of the cylinder (1), a refrigerant outlet pipe (5) is fixed on the upper sealing plate (2), a lubricating oil outlet (14) is provided on the oil storage pipe (13), an oil cooling spiral coil (15) is located in the oil storage pipe (13), and a cooling medium inlet (16) and a cooling medium outlet (17) are respectively fixed at two ends of the oil cooling spiral coil (15) and pass through the cylinder (1).

2. The high-efficiency oil separator with built-in cooling device according to claim 1, characterized in that: The opening of the refrigerant inlet pipe (4) is blocked by a baffle and a type I circular hole is provided on one side of the section located inside the cylinder (1), the direction of the type I circular hole being the same as the swirl direction of the layered swirl component (6).

3. The high-efficiency oil separator with built-in cooling device according to claim 2 is characterized in that: The layered swirl assembly (6) is composed of a plurality of swirl ribs (601) that are evenly distributed and assembled. The plurality of swirl ribs (601) are all fixed on the middle through pipe (9), and the outer sides of the plurality of swirl ribs (601) are all in contact with the inner wall of the cylinder (1).

4. The high-efficiency oil separator with built-in cooling device according to claim 3 is characterized in that: The baffle plate (7) is provided with a plurality of type II circular holes, and the plurality of type II circular holes are all located below the layered cyclone component (6); the baffle plate (7) is provided with a plurality of type III circular holes, and the plurality of type III circular holes are all located below the intermediate through pipe (9).

5. The high-efficiency oil separator with built-in cooling device according to claim 4, characterized in that: The outer side of the diffusion tube (10) is in contact with and sealed against the inner wall of the cylinder (1), and the middle through tube (9) and the diffusion tube (10) divide the interior of the cylinder (1) into upper and lower cavities.

6. The high-efficiency oil separator with built-in cooling device according to claim 1, characterized in that: The first-level filter screen (8) is a coarse-effect filter screen, and the second-level filter screen (12) is a fine-effect filter screen.

7. The high-efficiency oil separator with built-in cooling device according to claim 1, characterized in that: The oil cooling spiral coil (15) is a spiral coil structure, and the material includes copper and stainless steel.

8. The high-efficiency oil separator with built-in cooling device according to claim 2, characterized in that: The diameter of the type I circular hole is 3-5 mm.

9. The high-efficiency oil separator with built-in cooling device according to claim 4, characterized in that: The diameter of the type II circular hole is 8-12 mm.

10. The high-efficiency oil separator with built-in cooling device according to claim 4, characterized in that: The diameter of the III-type circular hole is 16-24 mm.

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