Water chiller unit capable of realizing automatic return of lubricating oil

Abstract

The utility model discloses a kind of water chilling unit of realizing automatic backflow of lubricating oil, the utility model relates to water chilling unit equipment technical field.It includes compressor main body, the filter mechanism for the automatic backflow of water chilling unit lubricating oil is arranged on compressor main body, filter mechanism includes: prompt component, including the oil separator of compressor main body one end setting, the utility model starts motor, cleaning component starts work, scraper plate rotates and removes impurity on filter screen, impurity scraped off is deposited in filter shell bottom, can be removed together when maintaining, the elastic pressure provided by second spring makes scraper plate support can adapt to the slight deformation or impurity accumulation height of filter screen support surface, ensure that scraper plate is always closely adhered, avoid cleaning dead angle, improve the recovery effect of filtering efficiency, then by rotating bidirectional screw rod, the fine adjustment of the opening and closing degree of sliding plate can be realized, and then the oil flow of oil return pipe is accurately controlled, adapt to lubricating oil demand under different working conditions.

Description

Technical Field

[0001] This utility model relates to the technical field of chiller equipment, specifically a chiller unit that realizes automatic return of lubricating oil. Background Technology

[0002] As the core equipment of refrigeration systems, chillers play a crucial role in numerous fields such as industrial production, commercial buildings, and data centers. The compressor, as a key component of the chiller, directly impacts the performance and reliability of the entire refrigeration system through its stable operation. During compressor operation, lubricating oil plays a vital role; it not only reduces friction and wear between components and lowers energy loss, but also provides cooling, sealing, and cleaning functions, ensuring the compressor's normal operation.

[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, during the actual operation of the chiller unit, impurities such as metal shavings, dust, and sludge will inevitably mix into the lubricating oil. If these impurities are not filtered in a timely and effective manner, they will circulate in the system with the lubricating oil, gradually wearing down the key components of the compressor. Filters are usually installed, but some filtration mechanisms lack effective means of monitoring the clogging status, making it difficult for operators to intuitively and promptly understand the degree of clogging. At the same time, the cleaning effect of the filter and the flexibility of flow control are insufficient. Therefore, this utility model provides a chiller unit that realizes automatic lubricating oil return. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a chiller unit that enables automatic lubricating oil return. This solves the problem that during the actual operation of the chiller unit, the lubricating oil inevitably mixes with impurities such as metal shavings, dust, and sludge. If these impurities are not filtered in a timely and effective manner, they will circulate within the system with the lubricating oil, gradually wearing down the critical components of the compressor. While filters are typically installed, some filtration mechanisms lack effective means of monitoring clogging, making it difficult for operators to intuitively and promptly understand the degree of clogging. Furthermore, the filter cleaning effect and flow control flexibility are insufficient.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a chiller unit for automatic lubricating oil return, comprising a compressor body, wherein the compressor body is provided with a filter mechanism for automatic lubricating oil return of the chiller unit, the filter mechanism comprising:

[0007] The prompting component includes an oil separator at one end of the compressor body, an oil return pipe on one side of the oil separator, a filter housing connected to the oil return pipe at one end via a flange, a slide rail bracket fixed inside the filter housing, a sliding plate connected to the slide rail bracket via an opening and closing component inside the slide rail bracket, a fixing ring fixed to the inner wall of the filter housing, a filter screen bracket connected to the inner wall of the fixing ring via an elastic component, a finger block fixed to the upper end of the filter screen bracket, and a glass window for sliding the finger block on the surface of the filter housing.

[0008] The cleaning component includes a filter housing with a movable housing connected to it via a drive component, and a scraper bracket connected to it via an adaptive component. The scraper bracket is in contact with the surface of the filter support.

[0009] Preferably, the opening and closing assembly includes a bidirectional lead screw rotatably connected inside the slide rail bracket, the slide plate is slidably connected inside the slide rail bracket, and the slide plates are configured in two sets, with the slide plates and the bidirectional lead screw being threadedly connected.

[0010] Preferably, the elastic component includes four sets of guide rods fixed to the inner wall of the fixing ring, the filter support is slidably connected to the outer wall of the guide rods, and a first spring is fixed to the inner wall of the filter support, the end of the first spring being fixedly connected to the fixing ring.

[0011] Preferably, the drive assembly includes a motor body fixed to the upper end of the filter housing, a support housing connected by a support rod inside the filter housing, a drive rod connected to the output end of the motor body, a first bevel gear fixed to one end of the drive rod extending into the support housing, a second bevel gear being provided on the inner side of the support housing, the first bevel gear and the second bevel gear being meshed, and the movable housing being fixedly connected to one end of the second bevel gear.

[0012] Preferably, the adaptive component includes a second spring fixed to the inner wall of the movable housing, a connecting block fixed to one end of the second spring, a connecting rod fixed to one end of the connecting block, and the scraper bracket fixedly connected to one end of the connecting rod.

[0013] Preferably, the outer wall of the connecting block has a gear-shaped structure, the inner wall of the movable outer shell has a toothed groove, and the connecting block and the movable outer shell are slidably connected.

[0014] Beneficial effects

[0015] This invention provides a chiller unit that achieves automatic lubricating oil return. Compared with the prior art, it has the following advantages:

[0016] Firstly, in this invention, lubricating oil enters the filter housing connected by a flange through a return oil pipe. A fixed ring inside the filter housing is connected to the filter screen support through an elastic component. The lubricating oil needs to be filtered by the filter screen support before entering the subsequent circuit to intercept impurities. Then, the finger block fixed at the upper end of the filter screen support moves synchronously with the filter screen support. Since the surface of the filter housing is provided with a glass window corresponding to the finger block, the operator can directly observe the position change of the finger block through the glass window to judge the degree of blockage of the filter screen support. The blockage state of the filter screen support is converted into an intuitive position signal, avoiding the problems of "blind maintenance" or "missed blockage judgment" of traditional filtration mechanisms, ensuring accurate maintenance timing and reducing the risk of equipment failure.

[0017] Secondly, the starting motor of this utility model enables the cleaning component to start working. The scraper rotates and scrapes away impurities on the filter screen. The scraped-off impurities are deposited at the bottom of the filter housing and can be removed during maintenance. The elastic pressure provided by the second spring allows the scraper support to adapt to slight deformation of the filter screen support surface or the height of impurity accumulation, ensuring that the scraper is always in close contact, avoiding cleaning dead corners, and improving the filtration efficiency. Then, by rotating the bidirectional screw, the opening and closing degree of the slide plate can be finely adjusted, thereby precisely controlling the oil flow of the return oil pipe and adapting to the lubrication needs under different working conditions. 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 slide rail bracket of this utility model;

[0020] Figure 3 This is a schematic diagram of the internal structure of the filter housing of this utility model;

[0021] Figure 4 For the present utility model Figure 3 Enlarged structural diagram at point A in the middle.

[0022] In the diagram: 1. Compressor body; 2. Oil separator; 201. Oil return pipe; 202. Filter housing; 3. Slide rail bracket; 301. Slide plate; 302. Double-acting lead screw; 4. Fixing ring; 401. Guide rod; 402. Filter screen bracket; 403. First spring; 404. Finger block; 405. Glass window; 5. Motor body; 501. Drive rod; 502. Support housing; 503. First bevel gear; 504. Second bevel gear; 505. Movable housing; 506. Second spring; 507. Connecting block; 508. Connecting rod; 509. Scraper bracket. Detailed Implementation

[0023] 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.

[0024] Please see Figure 1-4 This utility model provides a technical solution: a chiller unit that realizes automatic lubricating oil return, including a compressor body 1, and a filter mechanism for automatic lubricating oil return of the chiller unit is provided on the compressor body 1. The filter mechanism includes:

[0025] The prompting component includes an oil separator 2 at one end of the compressor body 1, an oil return pipe 201 on one side of the oil separator 2, a filter housing 202 connected by a flange at one end of the oil return pipe 201, a slide rail bracket 3 fixed inside the filter housing 202, a slide plate 301 connected by an opening and closing component inside the slide rail bracket 3, a fixing ring 4 fixed on the inner wall of the filter housing 202, a filter screen bracket 402 connected by an elastic component on the inner wall of the fixing ring 4, a finger block 404 fixed at the upper end of the filter screen bracket 402, and a glass window 405 for sliding the finger block 404 on the surface of the filter housing 202.

[0026] The cleaning assembly includes a filter housing 202 with a movable housing 505 connected via a drive assembly inside. The movable housing 505 has a scraper bracket 509 connected via an adaptive assembly inside. The scraper bracket 509 is in contact with the surface of the filter support 402.

[0027] The lubricating oil generated during the operation of the compressor body 1 first enters the oil separator 2 set at one end. After the oil separator 2 separates the oil from other media, the pure lubricating oil flows to the filter mechanism through the return oil pipe 201 on one side of the oil separator 2.

[0028] In a preferred embodiment, the opening and closing assembly includes a bidirectional lead screw 302 rotatably connected inside the slide rail bracket 3, and a sliding plate 301 slidably connected inside the slide rail bracket 3. Two sets of sliding plates 301 are configured, and the sliding plates 301 are threadedly connected to the bidirectional lead screw 302. The other end of the filter housing 202 is connected to the compressor body 1 via a pump body for controlling the flow rate of the return oil pipe 201. When the channel needs to be opened, the bidirectional lead screw 302 rotatably connected inside the slide rail bracket 3 is rotated. Since both sets of sliding plates 301 are threadedly connected to the bidirectional lead screw 302, and the threads of the bidirectional lead screw 302 rotate in opposite directions, the rotation of the bidirectional lead screw 302 drives the two sets of sliding plates 301 to slide in opposite directions along the slide rail bracket 3, thus opening the channel. When the channel needs to be closed, the bidirectional lead screw 302 is rotated in the opposite direction, and the two sets of sliding plates 301 slide towards each other until they are in contact, closing the channel. The other end of the filter housing 202 is connected to the compressor body 1 via a pump body. The opening and closing state of the sliding plates 301 directly controls the oil flow rate of the return oil pipe 201.

[0029] In a preferred embodiment, the elastic component includes four sets of guide rods 401 fixed to the inner wall of the fixing ring 4. The filter support 402 is slidably connected to the outer wall of the guide rods 401. A first spring 403 is fixed to the inner wall of the filter support 402, and the end of the first spring 403 is fixedly connected to the fixing ring 4. When the filter support 402 is severely clogged, the filter support 402 is compressed, and the lubricating oil enters the filter housing 202 connected by the flange through the return oil pipe 201. The fixing ring 4 fixed inside the filter housing 202 is connected to the filter support 402 through the elastic component. The lubricating oil needs to be filtered by the filter support 402. Then, it enters the subsequent circuit to intercept impurities. As the usage time increases, the impurities attached to the surface of the filter support 402 gradually increase, the filtration resistance increases, and the pressure of the oil on the filter support 402 increases synchronously. This pressure pushes the filter support 402 to compress the elastic component along the guide structure of the inner wall of the fixed ring 4. The finger block 404 fixed at the upper end of the filter support 402 moves synchronously with the filter support 402. Since the surface of the filter housing 202 is provided with a glass window 405 corresponding to the finger block 404, the operator can directly observe the position change of the finger block 404 through the glass window 405 to judge the degree of blockage of the filter support 402.

[0030] In a preferred embodiment, the drive assembly includes a motor body 5 fixed to the upper end of the filter housing 202, a support housing 502 connected by a support rod inside the filter housing 202, a drive rod 501 connected to the output end of the motor body 5, a first bevel gear 503 fixed to one end of the drive rod 501 extending into the support housing 502, a second bevel gear 504 provided on the inner side of the support housing 502, the first bevel gear 503 and the second bevel gear 504 being meshed, a movable housing 505 fixedly connected to one end of the second bevel gear 504, and an adaptive assembly including a second spring 506 fixed to the inner wall of the movable housing 505, a connecting block 507 fixed to one end of the second spring 506, a connecting rod 508 fixed to one end of the connecting block 507, a scraper bracket 509 fixedly connected to one end of the connecting rod 508, a gear-shaped structure on the outer wall of the connecting block 507, a toothed groove on the inner wall of the movable housing 505, and a sliding connection between the connecting block 507 and the movable housing 505.

[0031] Specifically, the output end of the motor body 5 drives the drive rod 501 to rotate. The first bevel gear 503, which is fixed at one end of the drive rod 501 inside the support housing 502, rotates synchronously. Since the first bevel gear 503 meshes with the second bevel gear 504 inside the support housing 502, the power is transmitted to the second bevel gear 504 through the bevel gear set. The movable housing 505, which is fixedly connected to the second bevel gear 504, rotates with the second bevel gear 504. The scraper bracket 509 inside the movable housing 505, which is connected through the adaptive component, performs a circular motion synchronously.

[0032] Furthermore, the second spring 506 in the adaptive component applies a continuous elastic force to the connecting rod 508 through the connecting block 507, so that the scraper bracket 509 at the end of the connecting rod 508 is always in close contact with the surface of the filter support 402. During the circumferential movement of the scraper bracket 509, the impurities attached to the surface of the filter support 402 are scraped off.

[0033] The outer wall of the connecting block 507 has a gear-shaped structure and engages with the toothed grooves on the inner wall of the movable outer shell 505 to ensure that the scraper bracket 509 will not shift during movement and to ensure a stable cleaning trajectory.

[0034] The main motor model is Y90S-4, and the return oil pipe uses a pump body model CB-B10, which is existing technology and will not be elaborated 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 oil-containing medium generated by the compressor body 1 first enters the oil separator 2 for separation. The separated pure lubricating oil flows into the filter mechanism through the return oil pipe 201. During normal operation, the bidirectional lead screw 302 rotates to drive the two sets of sliding plates 301 to separate, opening the channel and allowing the lubricating oil to enter the filter housing 202. The lubricating oil then flows through the filter support 402 connected to the elastic component inside the fixed ring 4 for filtration. Impurities are intercepted. As impurities accumulate, the filter screen becomes clogged, leading to increased resistance. The oil pressure pushes the filter support 402 to overcome the elastic force of the first spring 403 and move along the guide rod 401 towards the inlet side. The finger block 404 fixed to the upper end of the filter support 402 moves accordingly. The operator can observe its position through the glass window 405 to intuitively judge the degree of filter screen clogging and achieve visual early warning.

[0037] When cleaning is required, firstly, the bidirectional lead screw 302 is rotated in the reverse direction, causing the two sets of sliding plates 301 to slide and close towards each other, cutting off the oil circuit and isolating the filter unit. Then, the motor body 5 is started, and its drive rod 501 drives the first bevel gear 503 to rotate. Through the meshing second bevel gear 504, the power is transmitted to the movable housing 505, causing it to rotate. The adaptive component inside the movable housing 505 starts to work. The second spring 506 provides radial elastic force to the scraper bracket 509 through the connecting block 507 and the connecting rod 508, making it stick tightly to the surface of the filter screen bracket 402. When the movable housing 505 rotates, the gear-shaped structure on the outer wall of the connecting block 507 cooperates with the tooth groove on the inner wall of the movable housing 505 to prevent the scraper bracket 509 from shifting, ensuring that it performs a stable circumferential scraping motion to remove impurities from the filter screen surface. If stubborn impurities are encountered, the scraper bracket 509 can compress the second spring 506 and retract radially to achieve elastic obstacle crossing and protect the filter screen.

[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 that realizes automatic lubricating oil return, comprising a compressor body (1), characterized in that: The compressor body (1) is provided with a filter mechanism for automatic return of lubricating oil from the chiller unit. The filter mechanism includes: The prompting component includes an oil separator (2) provided at one end of a compressor body (1), an oil return pipe (201) provided on one side of the oil separator (2), a filter housing (202) connected by a flange at one end of the oil return pipe (201), a slide rail bracket (3) fixed inside the filter housing (202), a slide plate (301) connected by an opening and closing component provided inside the slide rail bracket (3), a fixing ring (4) fixed on the inner wall of the filter housing (202), a filter screen bracket (402) connected by an elastic component provided on the inner wall of the fixing ring (4), a finger block (404) fixed at the upper end of the filter screen bracket (402), and a glass window (405) for sliding the finger block (404) provided on the surface of the filter housing (202). The cleaning assembly includes a filter housing (202) with an internally disposed movable housing (505) connected by a drive assembly. The movable housing (505) has an internally disposed scraper bracket (509) connected by an adaptive assembly. The scraper bracket (509) is in contact with the surface of the filter support (402).

2. A chiller unit for automatic lubricating oil return according to claim 1, characterized in that: The opening and closing assembly includes a bidirectional lead screw (302) rotatably connected inside the slide rail bracket (3), and a sliding plate (301) is slidably connected inside the slide rail bracket (3). The sliding plate (301) is configured in two sets, and the sliding plate (301) is threadedly connected to the bidirectional lead screw (302).

3. A chiller unit for automatic lubricating oil return according to claim 1, characterized in that: The elastic component includes four sets of guide rods (401) fixed to the inner wall of the fixing ring (4), the filter support (402) is slidably connected to the outer wall of the guide rods (401), and a first spring (403) is fixed to the inner wall of the filter support (402), the end of the first spring (403) is fixedly connected to the fixing ring (4).

4. A chiller unit for automatic lubricating oil return according to claim 1, characterized in that: The drive assembly includes a motor body (5) fixed to the upper end of a filter housing (202). A support housing (502) is provided inside the filter housing (202) and connected by a support rod. A drive rod (501) is connected to the output end of the motor body (5). A first bevel gear (503) is fixed to one end of the drive rod (501) extending into the inside of the support housing (502). A second bevel gear (504) is provided on the inner side of the support housing (502). The first bevel gear (503) and the second bevel gear (504) are meshed. The movable housing (505) is fixedly connected to one end of the second bevel gear (504).

5. A chiller unit for automatic lubricating oil return according to claim 1, characterized in that: The adaptive component includes a second spring (506) fixed to the inner wall of the movable housing (505), a connecting block (507) fixed to one end of the second spring (506), a connecting rod (508) fixed to one end of the connecting block (507), and a scraper bracket (509) fixedly connected to one end of the connecting rod (508).

6. A chiller unit for automatic lubricating oil return according to claim 5, characterized in that: The outer wall of the connecting block (507) has a gear-shaped structure, and the inner wall of the movable outer shell (505) has a toothed groove. The connecting block (507) and the movable outer shell (505) are slidably connected.

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