Totally-closed oil separation screw refrigerating unit

Abstract

The utility model relates to the technical field of screw refrigerating units, in particular to a totally-enclosed oil separation screw refrigerating unit, which comprises a screw refrigerating unit body, a centrifugal separator is arranged at an exhaust port of a compressor on the screw refrigerating unit body, a filter separator is arranged on the centrifugal separator, and the filter separator is connected with the screw refrigerating unit body. A centrifugal separator is arranged at an exhaust port of a compressor, a filter separator is arranged on the centrifugal separator, an oil discharge pipe and an exhaust pipe are arranged between the bottom end of the filter separator and the screw refrigerating unit body, and a cooling box is arranged between the oil discharge pipe and the exhaust pipe. The chance that lubricating oil enters the refrigerating system is greatly reduced, the refrigerating efficiency is improved, the temperature of exhausted gas and oil is effectively reduced through the cooling box, and the stability and reliability of the whole system are improved.

Description

Technical Field

[0001] This utility model relates to the technical field of screw chiller units, specifically a fully enclosed oil-separating screw chiller unit. Background Technology

[0002] As is well known, in traditional screw compressor units, the separation of lubricating oil and refrigerant has always been a key factor affecting system efficiency and equipment lifespan. Traditional designs typically employ only a single oil separation method, such as simple centrifugal separation or filtration separation. This results in the lubricating oil not being completely separated, and residual lubricating oil mixes into the refrigerant circulation system. This not only reduces the cooling effect but may also damage other components of the system, such as increasing compressor wear. Furthermore, as the equipment operates for longer periods, especially under high load conditions, the lubricating oil temperature in the oil drain pipe becomes high, and the accumulation of heat also affects the stability and efficiency of the entire refrigeration system. Therefore, it is necessary to propose a solution to this technical problem. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this utility model provides a fully enclosed oil-separating screw chiller unit.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, this utility model provides the following technical solution: a fully enclosed oil-separating screw chiller unit, comprising a screw chiller unit body, a centrifugal separator provided at the exhaust port of the compressor on the screw chiller unit body, a filter separator provided on the centrifugal separator, an oil drain pipe and an exhaust pipe provided between the bottom end of the filter separator and the screw chiller unit body, a cooling box provided between the oil drain pipe and the exhaust pipe, a heat dissipation mechanism provided on the cooling box, the heat dissipation mechanism including a heat conduction frame and a fan, the heat conduction frame and the fan being installed on one side of the cooling box, a cleaning box provided on one side of the screw chiller unit body, an air supply mechanism and a cleaning pipe provided on the cleaning box, the cleaning pipe being installed inside the cleaning box, and a nozzle provided between the cleaning pipe and the cleaning box.

[0007] Furthermore, the present invention is improved in that the air supply mechanism includes an air pump, the air pump is installed on the top of the cleaning box and is provided with a protective shell, the air pump is provided with a filter mechanism, and a transmission pipe is provided between the air pump and the cleaning pipe.

[0008] Furthermore, the present invention is improved in that the filtration mechanism includes an air inlet pipe, which is installed at the input end of the air pump, and a filter frame is provided on the air inlet pipe, which is threadedly connected to the air inlet pipe.

[0009] Furthermore, the present invention is improved in that the heat dissipation mechanism is provided in two parts and arranged symmetrically.

[0010] Furthermore, the present invention is improved in that the heat dissipation mechanism further includes a copper pipe, which is installed on one side of the cooling box and located above the fan.

[0011] Furthermore, the present invention is improved in that the copper tubes are provided in multiple and arranged in an array.

[0012] Furthermore, the present invention is improved in that the nozzle is provided in multiple groups and arranged in an array, and the nozzle is inclined.

[0013] Furthermore, an improvement of this utility model is that a temperature sensor is provided on one side of the cooling box.

[0014] (III) Beneficial Effects

[0015] Compared with the prior art, this utility model provides a fully enclosed oil-separating screw chiller unit, which has the following beneficial effects:

[0016] This fully enclosed oil-separating screw chiller unit achieves two-stage separation of lubricating oil by installing a centrifugal separator at the compressor exhaust port and adding a filter separator on top of it. The first stage uses centrifugal force to separate more than 90% of the lubricating oil, and then the filter separator performs secondary fine filtration to ensure efficient separation between lubricating oil and refrigerant. This greatly reduces the chance of lubricating oil entering the refrigeration system, improves refrigeration efficiency, and extends equipment life. The cooling box between the oil drain pipe and the exhaust pipe effectively reduces the temperature of the discharged gas and oil. The cooling box not only helps protect the equipment from high-temperature damage but also improves the stability and reliability of the entire system.

[0017] To address the issue of dust and dirt buildup that may occur after prolonged use, particularly affecting the heat dissipation efficiency of the fan and heat sink, the cleaning box's air supply mechanism and cleaning pipe allow the nozzles to blow air directly onto the heat dissipation mechanism, effectively removing dust and dirt without requiring manual cleaning during machine shutdown. This greatly simplifies the maintenance process, reduces maintenance costs, and ensures continuous and efficient operation of the equipment. Attached Figure Description

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

[0019] Figure 2 This is a schematic diagram of the structure of the present utility model. Figure 2 ;

[0020] Figure 3 This utility model Figure 1Enlarged half-sectional view of the central heat-conducting frame;

[0021] Figure 4 This utility model Figure 1 Enlarged front half-section view of the intermediate cooling chamber.

[0022] In the diagram: 1. Screw compressor unit body; 2. Centrifugal separator; 3. Filter separator; 4. Oil drain pipe; 5. Exhaust pipe; 6. Cooling box; 7. Heat conduction frame; 8. Fan; 9. Cleaning box; 10. Cleaning pipe; 11. Nozzle; 12. Air inlet pipe; 13. Air pump; 14. Filter frame; 15. Protective shell; 16. Transfer pipe; 17. Copper pipe; 18. Temperature sensor. 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 1-4This utility model relates to a fully enclosed oil-separating screw chiller unit, comprising a screw chiller unit body 1. A centrifugal separator 2 is installed at the compressor exhaust port of the screw chiller unit body 1. A filter separator 3 is installed on the centrifugal separator 2. An oil drain pipe 4 and an exhaust pipe 5 are provided between the bottom end of the filter separator 3 and the screw chiller unit body 1. A cooling box 6 is provided between the oil drain pipe 4 and the exhaust pipe 5. A heat dissipation mechanism is provided on the cooling box 6, including a heat-conducting frame 7 and a fan 8. Both the heat-conducting frame 7 and the fan 8 are installed on one side of the cooling box 6. A cleaning box 9 is provided on one side of the screw chiller unit body 1. An air supply mechanism and a cleaning pipe 10 are provided on the cleaning box 9. The cleaning pipe 10 is installed inside the cleaning box 9. A nozzle 11 is provided between the cleaning pipe 10 and the cleaning box 9. In this embodiment, the compressor exhaust port of the screw chiller unit body 1 is equipped with a centrifugal separator 2, utilizing centrifugal force to separate 90% of the oil. More than 90% of the lubricating oil is introduced into the filter separator 3 from top to bottom for secondary separation. Then, it is cooled by the cooling box 6 on the oil drain pipe 4. After cooling, it is directly returned to the compressor bearing and rotor cavity. The exhaust pipe 5 is connected to the condenser of the screw refrigeration unit body 1 for further cooling. This can achieve efficient separation of lubricating oil and refrigerant. The heat from the cooling box 6 is quickly transferred to the heat conduction frame 7 of the heat dissipation mechanism. Then, the fan 8 rotates, allowing the heat to evaporate quickly in contact with the heat dissipation frame in the outside air, thus achieving efficient heat dissipation. This can quickly reduce the heat of the exhaust pipe 5 and the oil drain pipe 4, making it easy to use. After long-term use, dust and dirt will accumulate on the fan 8 and the heat dissipation frame, affecting the heat dissipation efficiency of the cooling box 6. At this time, the gas is delivered to the nozzle 11 through the cleaning pipe 10 by the gas supply mechanism. Then, the gas is blown into the heat dissipation mechanism through the nozzle 11, thus achieving efficient cleaning of the dust and dirt on the fan 8 and the heat dissipation frame, thereby achieving self-cleaning and improving heat dissipation efficiency.

[0025] To facilitate gas supply, in this solution, the gas supply mechanism includes an air pump 13, which is installed on the top of the cleaning box 9 and is equipped with a protective shell 15. The air pump 13 is equipped with a filter mechanism, and a transmission pipe 16 is provided between the air pump 13 and the cleaning pipe 10. The air entering from the input end of the air pump 13 is filtered by the filter mechanism, and then transported to the cleaning pipe 10 through the transmission pipe 16. The air is then sprayed out through the nozzle 11 of the cleaning pipe 10, thereby realizing the cleaning operation.

[0026] To facilitate air filtration, in this design, the filtration mechanism includes an air inlet pipe 12, which is installed at the input end of the air pump 13. A filter frame 14 is provided on the air inlet pipe 12, and the filter frame 14 is threadedly connected to the air inlet pipe 12. Through the filter frame 14 threaded on the air inlet pipe 12, impurities in the outside air are filtered out, and then the air enters the air pump 13 through the air inlet pipe 12. The threaded filter frame 14 can be easily disassembled and replaced.

[0027] To improve heat dissipation efficiency, in this solution, two heat dissipation mechanisms are provided and symmetrically arranged. The heat dissipation efficiency of the cooling box 6 can be further improved by using two symmetrically arranged heat dissipation mechanisms.

[0028] To improve the heat transfer efficiency of the cooling chamber 6, the heat dissipation mechanism in this design also includes copper pipes 17. These copper pipes 17 are installed on one side of the cooling chamber 6, above the fan 8. The copper pipes 17 on one side of the cooling chamber 6 efficiently absorb heat, which is then dissipated by the fan 8. Multiple copper pipes 17 are arranged in an array, further enhancing the heat absorption efficiency of the cooling chamber 6.

[0029] To improve cleaning efficiency, in this solution, the nozzles 11 are provided in multiple sets and arranged in an array. The nozzles 11 are tilted. By using multiple, arrayed and tilted nozzles 11, the efficiency of blowing away dust and impurities from the fan 8 and the heat sink frame can be further improved.

[0030] In order to facilitate the detection of the temperature of the cooling box 6, in this solution, a temperature sensor 18 is provided on one side of the cooling box 6, and the heat of the cooling box 6 can be easily detected by the temperature sensor 18.

[0031] 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 fully enclosed oil-separating screw chiller unit, comprising a screw chiller unit body (1), characterized in that, The compressor exhaust port of the screw chiller unit body (1) is provided with a centrifugal separator (2), the centrifugal separator (2) is provided with a filter separator (3), the bottom end of the filter separator (3) is provided with an oil drain pipe (4) and an exhaust pipe (5) between the screw chiller unit body (1), a cooling box (6) is provided between the oil drain pipe (4) and the exhaust pipe (5), a heat dissipation mechanism is provided on the cooling box (6), the heat dissipation mechanism includes a heat conduction frame (7) and a fan (8), the heat conduction frame (7) and the fan (8) are both installed on one side of the cooling box (6), a cleaning box (9) is provided on one side of the screw chiller unit body (1), a gas supply mechanism and a cleaning pipe (10) are provided on the cleaning box (9), the cleaning pipe (10) is installed inside the cleaning box (9), and a nozzle (11) is provided between the cleaning pipe (10) and the cleaning box (9).

2. The fully enclosed oil-separating screw chiller unit according to claim 1, characterized in that, The air supply mechanism includes an air pump (13), which is installed on the top of the cleaning box (9) and has a protective shell (15). The air pump (13) is equipped with a filter mechanism, and a transmission pipe (16) is provided between the air pump (13) and the cleaning pipe (10).

3. The fully enclosed oil-separating screw chiller unit according to claim 2, characterized in that, The filtration mechanism includes an air inlet pipe (12), which is installed at the input end of the air pump (13). A filter frame (14) is provided on the air inlet pipe (12), and the filter frame (14) is threadedly connected to the air inlet pipe (12).

4. The fully enclosed oil-separating screw chiller unit according to claim 3, characterized in that, The heat dissipation mechanism has two parts, which are arranged symmetrically.

5. A fully enclosed oil-separating screw chiller unit according to claim 4, characterized in that, The heat dissipation mechanism also includes a copper pipe (17), which is installed on one side of the cooling box (6) and is located above the fan (8).

6. The fully enclosed oil-separating screw chiller unit according to claim 5, characterized in that, The copper tubes (17) are provided in multiple and arranged in an array.

7. A fully enclosed oil-separating screw chiller unit according to claim 6, characterized in that, The nozzle (11) is provided in multiple groups and arranged in an array, and the nozzle (11) is arranged at an angle.

8. A fully enclosed oil-separating screw chiller unit according to claim 7, characterized in that, A temperature sensor (18) is provided on one side of the cooling box (6).

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