Water chiller with oil separation structure

Abstract

The utility model discloses a water chilling unit with oil liquid separation structure, the utility model relates to water chilling unit technical field. Including compressor main body, the utility model passes through the secondary separation effect of filter drum, can further intercept the tiny oil drop of remaining in refrigerant, has improved the precision of oil liquid separation greatly, makes the refrigerant after separation more pure, reduces the influence to water chilling unit equipment, and the design of scraper support can clean the oil drop of filter drum outer wall attachment in time, effectively prevent oil drop from blocking filter drum aperture, guarantee filter drum long -term stably play the filtering effect, the setting of defoaming board and corrugated block can eliminate the bubble in oil liquid, avoid bubble and enter compressor main body after influencing compressor's normal operation, guarantee water chilling unit equipment's stability and reliability, then through oil return pipe will separate and collect after lubricating oil and send back compressor main body, has realized the recycling of lubricating oil, has reduced lubricating oil's waste, has reduced operating cost.

Description

Technical Field

[0001] This utility model relates to the field of chiller technology, specifically a chiller with an oil-liquid separation structure. Background Technology

[0002] As an indispensable refrigeration equipment in industrial production, commercial buildings, and residential homes, chiller units work on the core principle of compressing refrigerant into a high-temperature, high-pressure state using a compressor. Heat exchange occurs through processes such as condensation, throttling, and evaporation, achieving a cooling effect. During compressor operation, lubricating oil is used for lubrication and cooling to reduce frictional losses in internal moving parts and extend their service life. The refrigerant mixes thoroughly with the lubricating oil during compression, forming a gas-liquid mixture.

[0003] Reference patent (publication number: CN223499811U; publication date: 2025-10-31) discloses a flooded water chiller unit, including: a compressor, an oil separator fixedly connected to one side of the compressor, an oil return pipe fixedly connected to one side of the oil separator, an oil return valve fixedly connected to one side of the oil return pipe, an oil return valve fixedly connected to one end above the compressor on the other side, an inlet pipe fixedly connected to the other side of the oil separator, and a condenser fixedly connected to the other side of the inlet pipe. The built-in oil separator effectively solves the problem of mixing of lubricating oil and refrigerant. Through precise oil separation, excess lubricating oil can automatically flow back to the compressor, ensuring that the compressor is always in a good lubrication state, extending the service life of the compressor, reducing maintenance costs, and reducing the complexity and possibility of human operation errors.

[0004] Based on the aforementioned patent, in the operation of traditional chiller units, when the compressor compresses the refrigerant to a high temperature and high pressure state, lubricating oil will mix in to form a gas-liquid mixture. However, many traditional chiller units use relatively simple oil-liquid separation methods, mainly relying on gravity settling or simple baffle separation, which cannot quickly and effectively separate the oil and refrigerant in the oil-liquid mixture. Moreover, even with only a single separation, a large number of tiny oil droplets may still remain in the refrigerant, resulting in low purity of the separated refrigerant. Therefore, this utility model provides a chiller unit with an oil-liquid separation structure. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a chiller unit with an oil-liquid separation structure. This solves the problem that many traditional chiller units use relatively simple oil-liquid separation methods, mainly relying on gravity settling or simple baffle separation, which cannot quickly and effectively separate the oil and refrigerant in the oil-liquid mixture. Furthermore, even with only a single separation, a large number of tiny oil droplets may still remain in the refrigerant, resulting in low purity of the separated refrigerant.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a chiller unit with an oil-liquid separation structure, comprising a compressor body, wherein the compressor body is provided with an oil-liquid separation mechanism for the chiller unit, the oil-liquid separation mechanism comprising:

[0007] The centrifugal assembly includes a conduit disposed on one side of the compressor body, one end of the conduit being connected to an oil-liquid separator housing, a support frame being fixed to the inner wall of the oil-liquid separator housing, a connecting shaft being rotatably connected inside the support frame, and a centrifugal impeller being fixed to the lower end of the connecting shaft;

[0008] A filtration assembly includes an oil-liquid separation housing connected to the inside of the oil-liquid separation housing by a support rod. The filter housing contains a filter cartridge, and a scraper bracket is provided on the outside of the filter cartridge. An oil collection housing is provided at the bottom of the oil-liquid separation housing. An inclined defoaming plate is fixed to the inner wall of the oil collection housing, and corrugated blocks are fixed to the surface of the defoaming plate.

[0009] Preferably, a first motor is provided at the upper end of the oil separator housing, and the output end of the first motor is fixedly connected to the connecting shaft.

[0010] Preferably, the interior of the oil separator housing is provided with a mounting housing connected by a support rod. The inner side of the mounting housing is provided with a first bevel gear, and the outer side of the oil separator housing is provided with a second motor. The output end of the second motor is fixedly connected to the first bevel gear. The lower end of the mounting housing is rotatably connected to a movable shaft. The upper end of the movable shaft is fixed with a second bevel gear. The second bevel gear is meshed with the first bevel gear. The scraper bracket is located at the lower end of the movable shaft.

[0011] Preferably, the scraper support has an L-shaped structure and is fitted and connected to the outer wall of the filter cartridge.

[0012] Preferably, the lower end of the filter separation shell has evenly distributed leakage holes, and the leakage holes have a conical structure.

[0013] Preferably, a return oil pipe is fixed through one side of the oil collection shell, and one end of the return oil pipe is connected to the compressor body.

[0014] Beneficial effects

[0015] This invention provides a chiller unit with an oil-liquid separation structure. Compared with the prior art, it has the following advantages:

[0016] Firstly, this invention starts the first motor, whose output drives the connecting shaft to rotate. The connecting shaft rotates stably through the support frame. The centrifugal impeller at the lower end of the connecting shaft rotates synchronously at high speed with the connecting shaft, generating a strong centrifugal force on the gas-liquid mixture entering the oil-liquid separation shell. Since the density of lubricating oil is greater than that of refrigerant, under the action of centrifugal force, the denser lubricating oil is thrown towards the inner wall of the oil-liquid separation shell and naturally slides down the inner wall into the oil collection shell below. The refrigerant, after the lubricating oil is initially separated, continues to flow towards the filter component inside the oil-liquid separation shell and enters the secondary separation stage. By utilizing the action of centrifugal force, the oil and refrigerant in the oil-liquid mixture can be quickly separated in the initial stage, improving the separation efficiency and reducing the workload of subsequent separation steps.

[0017] Secondly, this invention, through the two-stage separation of the filter cartridge, can further trap tiny oil droplets remaining in the refrigerant, greatly improving the precision of oil-liquid separation and making the separated refrigerant purer, reducing the impact on the chiller unit. Furthermore, the scraper bracket design can promptly clean oil droplets adhering to the outer wall of the filter cartridge, effectively preventing oil droplets from clogging the filter cartridge pores and ensuring the filter cartridge performs its filtering function stably for a long time. Simultaneously, the defoaming plate and corrugated block can eliminate air bubbles in the oil, preventing them from entering the compressor body and affecting the normal operation of the compressor, thus ensuring the stability and reliability of the chiller unit. Finally, the separated and collected lubricating oil is returned to the compressor body through the oil return pipe, realizing the recycling of lubricating oil, reducing lubricating oil waste, and lowering operating costs. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the internal structure of the oil separator shell of this utility model;

[0020] Figure 3 This is a schematic diagram of the scraper bracket connection structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the filter separation shell structure of this utility model;

[0022] Figure 5 This is a schematic diagram of the oil collection shell structure of this utility model.

[0023] In the diagram: 1. Compressor body; 2. Pipe; 3. Oil-liquid separator housing; 301. Support frame; 302. Connecting shaft; 303. Centrifugal impeller; 304. First motor; 4. Filter separation housing; 401. Filter cartridge; 402. Leakage hole; 5. Mounting housing; 501. First bevel gear; 502. Second motor; 503. Movable shaft; 504. Second bevel gear; 505. Scraper bracket; 6. Oil collection housing; 601. Oil return pipe; 602. Defoaming plate; 603. Corrugated block. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figures 1-5 This utility model provides a technical solution: a chiller unit with an oil-liquid separation structure, including a compressor body 1, on which an oil-liquid separation mechanism for the chiller unit equipment is provided, the oil-liquid separation mechanism including:

[0026] The centrifugal assembly includes a conduit 2 disposed on one side of the compressor body 1, an oil-liquid separator shell 3 connected to one end of the conduit 2, a support frame 301 fixed to the inner wall of the oil-liquid separator shell 3, a connecting shaft 302 rotatably connected inside the support frame 301, and a centrifugal impeller 303 fixed to the lower end of the connecting shaft 302.

[0027] The filter assembly includes an oil separation housing 3 connected to a filter separation housing 4 via a support rod. The filter separation housing 4 has a filter cartridge 401 inside and a scraper bracket 505 on the outside of the filter cartridge 401. An oil collection housing 6 is located at the bottom of the oil separation housing 3. An inclined defoaming plate 602 is fixed to the inner wall of the oil collection housing 6. A corrugated block 603 is fixed to the surface of the defoaming plate 602.

[0028] When the compressor body 1 is working, it compresses the refrigerant into a high temperature and high pressure state, and at the same time mixes with the lubricating oil in the compressor to form a gas-liquid mixture. This gas-liquid mixture is transported to the inside of the oil-liquid separator shell 3 through the conduit 2.

[0029] In a preferred embodiment, a first motor 304 is provided at the upper end of the oil-liquid separation shell 3. The output end of the first motor 304 is fixedly connected to the connecting shaft 302. After centrifugation, the lubricating oil slides down the inner wall of the oil-liquid separation shell 3 to the oil collection shell 6. When the first motor 304 is started, its output end drives the connecting shaft 302 to rotate. The connecting shaft 302 achieves stable rotation through the support frame 301. The centrifugal impeller 303 at the lower end of the connecting shaft 302 rotates synchronously at high speed with the connecting shaft 302, generating a strong centrifugal force on the gas-liquid mixture entering the oil-liquid separation shell 3. Since the density of the lubricating oil is greater than that of the refrigerant, under the action of centrifugal force, the denser lubricating oil is thrown towards the inner wall of the oil-liquid separation shell 3 and slides naturally down the inner wall into the oil collection shell 6 below. The refrigerant after the lubricating oil is initially separated continues to flow towards the filter component inside the oil-liquid separation shell 3 and enters the secondary separation stage.

[0030] In a preferred embodiment, the oil separator housing 3 has an internal mounting housing 5 connected by a support rod. A first bevel gear 501 is located inside the mounting housing 5, and a second motor 502 is located outside the oil separator housing 3. The output end of the second motor 502 is fixedly connected to the first bevel gear 501. A movable shaft 503 is rotatably connected to the lower end of the mounting housing 5, and a second bevel gear 504 is fixed to the upper end of the movable shaft 503. The second bevel gear 504 meshes with the first bevel gear 501. A scraper bracket 505 is also included. Located at the lower end of the movable shaft 503, the scraper support 505 has an L-shaped structure and is attached to the outer wall of the filter cartridge 401. The refrigerant passes through the cylindrical filter cartridge 401. The 5-10μm pore size of the filter cartridge 401 can trap the tiny oil droplets remaining in the refrigerant, achieving secondary separation. The trapped oil droplets gather and drip under the action of gravity and enter the filter separation shell 4. The lower end of the filter separation shell 4 has evenly distributed leakage holes 402. The leakage holes 402 have a cone-shaped structure and drip through the leakage holes 402 onto the oil collection shell 6.

[0031] Specifically, the refrigerant, after initial separation by the centrifugal assembly, enters the filter separation shell 4 inside the oil separation shell 3. The refrigerant passes through the cylindrical filter cartridge 401 inside the filter separation shell 4. The 5-10μm pore size of the filter cartridge 401 can accurately trap the tiny oil droplets remaining in the refrigerant, achieving secondary separation. The second motor 502 starts, and its output end drives the first bevel gear 501 to rotate. Because the second bevel gear 504 is meshed with the first bevel gear 501, the second bevel gear 504 rotates accordingly, thereby driving the movable shaft 503 to rotate. The scraper support 505 at the lower end of the movable shaft 503 also rotates accordingly. The scraper support 505 has an L-shaped structure and is in close contact with the outer wall of the filter cartridge 401. During the rotation, it can scrape off the oil droplets attached to the outer wall of the filter cartridge 401, preventing the oil droplets from clogging the pore size of the filter cartridge 401 and ensuring the filtration effect of the filter cartridge 401.

[0032] Furthermore, the lower end of the filter separation shell 4 has evenly distributed cone-shaped leakage holes 402. Oil droplets falling onto the bottom of the filter separation shell 4 drip through the leakage holes 402 into the oil collection shell 6. The inner wall of the oil collection shell 6 is fixed with an inclined defoaming plate 602, and corrugated blocks 603 are fixed on the surface of the defoaming plate 602. During the oil droplet's fall, it collides with the defoaming plate 602 and the corrugated blocks 603, which can eliminate air bubbles in the oil and prevent air bubbles from affecting the oil quality and subsequent use.

[0033] In a preferred embodiment, a return oil pipe 601 is fixedly installed through one side of the oil collection housing 6. One end of the return oil pipe 601 is connected to the compressor body 1. The lubricating oil collected in the oil collection housing 6 returns to the compressor body 1 through the return oil pipe 601, thereby realizing the recycling of the lubricating oil.

[0034] The first motor is model 37GB-555, the second motor is model 25GA-370, and the return oil pipe 601 uses a DB-12 miniature gear pump. All of these are existing technologies and will not be elaborated on further.

[0035] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0036] During operation, the compressor body 1 sends a mixture of refrigerant and lubricating oil into the oil-liquid separator shell 3 through the conduit 2. First, the first motor 304 is started, driving the connecting shaft 302 to rotate the centrifugal impeller 303 at high speed. Under the action of strong centrifugal force, the denser lubricating oil is thrown towards the inner wall of the oil-liquid separator shell 3 and slides into the oil collection shell 6, completing the first-stage centrifugal separation. Subsequently, the refrigerant after preliminary separation enters the filter separation shell 4. When the refrigerant passes through the filter cartridge 401, its 5-10μm pore size intercepts residual tiny oil droplets, achieving the second-stage fine separation. At the same time, the second motor 502 is started, and through the meshing transmission of the first bevel gear 501 and the second bevel gear 504, it drives the scraper bracket 505 at the lower end of the movable shaft 503 to rotate. The L-shaped scraper bracket 505 continuously scrapes off the oil film attached to the outer wall of the filter cartridge 401 to prevent the filter holes from clogging.

[0037] The separated oil droplets gather at the bottom of the filter separation shell 4 and drip through the conical leakage hole 402 to the oil collection shell 6. During the fall, the oil droplets collide with the inclined defoaming plate 602 and the corrugated block 603 on the surface, breaking and eliminating air bubbles in the oil. Finally, the clean lubricating oil returns to the compressor body 1 through the oil return pipe 601, realizing the automatic recovery and recycling of lubricating oil.

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A chiller unit with an oil-liquid separation structure, comprising a compressor body (1), characterized in that: The compressor body (1) is provided with an oil-liquid separation mechanism for the chiller unit equipment, the oil-liquid separation mechanism including: The centrifugal assembly includes a conduit (2) provided on one side of the compressor body (1), one end of the conduit (2) is connected to an oil-liquid separator shell (3), a support frame (301) is fixed on the inner wall of the oil-liquid separator shell (3), a connecting shaft (302) is rotatably connected inside the support frame (301), and a centrifugal impeller (303) is fixed at the lower end of the connecting shaft (302). The filter assembly includes an oil separation shell (3) connected to a filter separation shell (4) by a support rod. The filter separation shell (4) is provided with a filter cartridge (401) inside. The filter cartridge (401) is provided with a scraper bracket (505) on the outside of the filter cartridge (401). The bottom of the oil separation shell (3) is provided with an oil collection shell (6). The inner wall of the oil collection shell (6) is fixed with an inclined defoaming plate (602). The surface of the defoaming plate (602) is fixed with a corrugated block (603).

2. A chiller unit with an oil-liquid separation structure according to claim 1, characterized in that: The upper end of the oil separator shell (3) is provided with a first motor (304), and the output end of the first motor (304) is fixedly connected to the connecting shaft (302).

3. A chiller unit with an oil-liquid separation structure according to claim 1, characterized in that: The oil-liquid separator housing (3) is provided with an installation housing (5) connected by a support rod. The inner side of the installation housing (5) is provided with a first bevel gear (501), and the outer side of the oil-liquid separator housing (3) is provided with a second motor (502). The output end of the second motor (502) is fixedly connected to the first bevel gear (501). The lower end of the installation housing (5) is rotatably connected with a movable shaft (503). The upper end of the movable shaft (503) is fixed with a second bevel gear (504). The second bevel gear (504) is meshed with the first bevel gear (501). The scraper bracket (505) is located at the lower end of the movable shaft (503).

4. A chiller unit with an oil-liquid separation structure according to claim 1, characterized in that: The scraper support (505) has an L-shaped structure and is attached to the outer wall of the filter cartridge (401).

5. A chiller unit with an oil-liquid separation structure according to claim 1, characterized in that: The lower end of the filter separation shell (4) is evenly distributed with leakage holes (402), and the leakage holes (402) have a cone-shaped structure.

6. A chiller unit with an oil-liquid separation structure according to claim 1, characterized in that: A return oil pipe (601) is fixed through one side of the oil collection shell (6), and one end of the return oil pipe (601) is connected to the compressor body (1).

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