Screw type water chilling unit

Abstract

The utility model discloses a screw type water chilling unit, and relates to the field of water chilling units. The device comprises an evaporator and a screw-type compressor, an oil-gas separation part is arranged between the evaporator and the screw-type compressor and comprises a shell and a rotary gas outlet column, a conical outer cavity is formed in the shell, an oil accumulation cavity is formed in the bottom end of the conical outer cavity, and the rotary gas outlet column is rotationally connected into the conical outer cavity; a conical inner cavity is formed in the rotary air outlet column and used for inputting refrigerant gas, an air outlet inclined hole is formed in the rotary air outlet column and used for spraying the refrigerant gas into the conical outer cavity, and the oil accumulation cavity is used for containing oil sliding off from the conical outer cavity. According to the device, the oil-gas separation piece is arranged before the refrigerant gas enters the screw compressor, so that most of large-particle substances in the refrigerant gas entering the gas inlet structure are thoroughly separated from the gas, and the part of oil mist and impurities are prevented from entering the gas inlet structure of the compressor.

Description

Technical Field

[0001] This utility model relates to the technical field of water chiller units, specifically screw water chiller units. Background Technology

[0002] Screw chillers are large and medium-sized refrigeration equipment with a screw compressor as their core component, widely used in commercial building air conditioning, industrial process cooling, and other fields. Their working principle involves a cyclical process of heat transfer achieved through refrigerant absorbing heat and evaporating in the evaporator, compression and heating by the compressor, heat release and condensation in the condenser, and throttling and pressure reduction by the expansion valve. As the core power source of the unit, the screw compressor uses a pair of meshing male and female rotors that continuously rotate within the casing to compress the low-temperature, low-pressure refrigerant gas, converting mechanical energy into gas pressure energy.

[0003] In existing screw chiller units, when the refrigerant is converted into a low-temperature, low-pressure gas in the evaporator and enters the screw compressor, it carries some small droplets of lubricating oil. This lubricating oil adheres to the filter screen inside the compressor's intake structure, causing filter blockage. In severe cases, this blockage can prevent refrigerant from entering the compressor, leading to serious consequences. To address these issues, this invention provides a screw chiller unit to solve the aforementioned problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a screw chiller unit, which solves the problem that in existing screw chiller units, when the refrigerant is converted into a low-temperature, low-pressure gas in the evaporator and enters the screw compressor, it carries some small water droplets of lubricating oil. This lubricating oil adheres to the filter screen inside the compressor's intake structure, causing filter blockage. In severe cases, this blockage can prevent the refrigerant from entering the compressor, leading to serious consequences.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a screw chiller unit, comprising an evaporator and a screw compressor, wherein an oil-gas separator is provided between the evaporator and the screw compressor, the oil-gas separator comprising a housing and a rotary outlet column, the housing having a conical outer cavity, the bottom of the conical outer cavity having an oil accumulation cavity, the rotary outlet column being rotatably connected to the conical outer cavity, the rotary outlet column having a conical inner cavity, the conical inner cavity being used for inputting refrigerant gas, the rotary outlet column having an oblique outlet hole, the oblique outlet hole being used for spraying refrigerant gas into the conical outer cavity, and the oil accumulation cavity being used to collect oil that slides down from the conical outer cavity.

[0006] Preferably, a servo motor is installed at the top of the housing, and the rotary air column is fixedly connected to the power output end of the servo motor.

[0007] Preferably, the bottom of the housing is fixedly connected to an air supply base, the top of the air supply base is fixedly connected to a rotating shaft, the bottom of the rotating air outlet column is provided with a connecting groove, the connecting groove communicates with the conical inner cavity, the connecting groove is rotatably connected to the rotating shaft, and the rotating air outlet column is rotatably connected to the air supply base.

[0008] Preferably, an evaporator outlet pipe is fixedly connected to the top of the evaporator, and the evaporator outlet pipe is fixedly connected to the gas supply base. The evaporator outlet pipe is used to input the refrigerant in the evaporator into the gas supply base.

[0009] Preferably, the screw compressor has a compressor intake pipe fixedly connected to the outer end of its intake structure. The compressor intake pipe is fixedly connected to the top of the housing and is used to input the refrigerant gas from the oil separator into the screw compressor.

[0010] Preferably, an oil output valve is fixedly connected to the bottom end of the gas supply base, and the oil output valve communicates with the oil accumulation chamber.

[0011] Preferably, the screw compressor is externally provided with an oil separator, a condenser, and a support frame. The oil separator is connected to the screw compressor, one end of the condenser is connected to the oil separator, and one end of the condenser is connected to the expansion valve and then to the evaporator. The support frame is used to support the evaporator and the condenser.

[0012] This utility model discloses a screw chiller unit, which has the following beneficial effects: By setting an oil-gas separator before the refrigerant enters the screw compressor, most of the large particulate matter in the refrigerant gas entering the intake structure is completely separated from the gas, preventing this oil mist and impurities from entering the compressor's intake structure. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the overall front structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the overall structure of the oil-gas separator of this utility model;

[0016] Figure 3 This is a schematic cross-sectional view of the oil-gas separator of this utility model.

[0017] Figure 4 This is a schematic diagram of the exploded structure of the oil-gas separator of this utility model;

[0018] Figure 5 This is a schematic diagram of the cross-sectional structure of the rotating air outlet column of this utility model.

[0019] In the diagram: 1. Evaporator; 11. Evaporator outlet pipe; 2. Screw compressor; 21. Compressor inlet pipe; 3. Oil separator; 4. Condenser; 5. Support frame; 6. Oil-gas separator; 61. Housing; 611. Conical outer cavity; 612. Oil accumulation cavity; 62. Servo motor; 63. Rotary outlet column; 631. Outlet oblique hole; 632. Conical inner cavity; 633. Connecting groove; 64. Gas delivery base; 641. Shaft; 65. Oil output valve. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model are described clearly and completely. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] This application provides a screw chiller unit, which solves the problem that in existing screw chiller units, when the refrigerant is converted into a low-temperature, low-pressure gas in the evaporator and enters the screw compressor, it carries some small water droplets of lubricating oil. This lubricating oil adheres to the filter screen inside the compressor's intake structure, causing filter blockage. In severe cases, this blockage can prevent the refrigerant from entering the compressor, resulting in serious consequences.

[0022] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0023] This utility model discloses a screw chiller unit.

[0024] According to the appendix Figure 1-5As shown, the system includes an evaporator 1 and a screw compressor 2. An oil-gas separator 6 is provided between the evaporator 1 and the screw compressor 2. The oil-gas separator 6 includes a housing 61 and a rotary outlet column 63. A conical outer cavity 611 is formed inside the housing 61, and an oil accumulation cavity 612 is formed at the bottom end of the conical outer cavity 611. The rotary outlet column 63 is rotatably connected inside the conical outer cavity 611. A conical inner cavity 632 is formed inside the rotary outlet column 63 for introducing refrigerant gas. An oblique outlet hole 631 is formed on the rotary outlet column 63 for spraying refrigerant gas into the conical outer cavity 63. The outer cavity 611 and the oil accumulation cavity 612 are used to hold the oil that slides down from the conical outer cavity 611. A servo motor 62 is installed at the top of the housing 61. A rotary air column 63 is fixedly connected to the power output end of the servo motor 62. The servo motor 62 drives the rotary air column 63 to rotate, which rotates the refrigerant gas that enters the conical inner cavity 632 and is sprayed out from the air outlet oblique hole 631 into the conical outer cavity 611. Large oil mist particles and other impurities in the refrigerant gas are thrown onto the conical surface of the conical outer cavity 611 under the action of inertial force, and then slide down onto the oil accumulation cavity 612 for storage.

[0025] A gas supply base 64 is fixedly connected to the bottom of the housing 61, and a rotating shaft 641 is fixedly connected to the top of the gas supply base 64. A connecting groove 633 is provided at the bottom of the rotating air column 63. The connecting groove 633 communicates with the conical inner cavity 632. The connecting groove 633 is rotatably connected to the rotating shaft 641. The rotating air column 63 is rotatably connected to the gas supply base 64. By setting the rotating shaft 641 and the connecting groove 633, the rotating air column 63 can be rotatably connected inside the housing 61.

[0026] Based on Example 1, according to Appendix Figure 1-5 As shown, an evaporator outlet pipe 11 is fixedly connected to the top of the evaporator 1. The evaporator outlet pipe 11 is fixedly connected to the gas supply base 64. The evaporator outlet pipe 11 is used to input the refrigerant in the evaporator 1 into the gas supply base 64. A compressor inlet pipe 21 is fixedly connected to the outer end of the intake structure of the screw compressor 2. The compressor inlet pipe 21 is fixedly connected to the top of the housing 61. The compressor inlet pipe 21 is used to input the refrigerant gas separated from the oil into the screw compressor 2.

[0027] An oil output valve 65 is fixedly connected to the bottom of the gas supply base 64. The oil output valve 65 communicates with the oil accumulation chamber 612. The oil output valve 65 is used to input oil into other components for storage and secondary use.

[0028] The screw compressor 2 is externally equipped with an oil separator 3, a condenser 4, and a support frame 5. The oil separator 3 is connected to the screw compressor 2, one end of the condenser 4 is connected to the oil separator 3, and the other end of the condenser 4 is connected to the expansion valve and then to the evaporator 1. The support frame 5 is used to support the evaporator 1 and the condenser 4. The principle of the screw chiller unit is that the refrigerant, which is converted into a low-temperature and low-pressure gas through heat exchange in the evaporator 1, is input into the screw compressor 2 and compressed and pressurized into a high-temperature and high-pressure gas. After passing through the oil separator 3 to remove the oil inside the refrigerant gas, it enters the condenser 4 to release heat and condense into a high-pressure liquid. Finally, the high-pressure liquid refrigerant is depressurized into a low-pressure liquid after passing through the expansion valve and re-enters the evaporator 1 to absorb heat and evaporate, transforming into a low-pressure and low-temperature gas.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. Screw water chiller comprising an evaporator (1) and a screw compressor (2), characterized in that, An oil-gas separator (6) is provided between the evaporator (1) and the screw compressor (2), the oil-gas separator (6) comprising: The housing (61) has a conical outer cavity (611) inside, and an oil accumulation cavity (612) is formed at the bottom end of the conical outer cavity (611). A rotary outlet column (63) is rotatably connected to a conical outer cavity (611). A conical inner cavity (632) is provided inside the rotary outlet column (63) for inputting refrigerant gas. An outlet oblique hole (631) is provided on the rotary outlet column (63) for spraying refrigerant gas into the conical outer cavity (611). An oil accumulation cavity (612) is used to collect oil that slides down from the conical outer cavity (611).

2. The screw water chiller according to claim 1, characterized in that: A servo motor (62) is installed at the top of the housing (61), and the rotary air column (63) is fixedly connected to the power output end of the servo motor (62).

3. The screw water chiller of claim 1, wherein: The bottom of the housing (61) is fixedly connected to an air supply base (64), and the top of the air supply base (64) is fixedly connected to a rotating shaft (641). The bottom of the rotating air outlet column (63) is provided with a connecting groove (633), which communicates with the conical inner cavity (632). The connecting groove (633) is rotatably connected to the rotating shaft (641), and the rotating air outlet column (63) is rotatably connected to the air supply base (64).

4. The screw water chiller of claim 3, wherein: The top of the evaporator (1) is fixedly connected to an evaporator outlet pipe (11), which is fixedly connected to the gas supply base (64). The evaporator outlet pipe (11) is used to input the refrigerant in the evaporator (1) into the gas supply base (64).

5. The screw water chiller of claim 1, wherein: The screw compressor (2) has a compressor intake pipe (21) fixedly connected to the outer end of the intake structure. The compressor intake pipe (21) is fixedly connected to the top of the housing (61). The compressor intake pipe (21) is used to input the refrigerant gas of the oil separator into the screw compressor (2).

6. The screw water chiller of claim 3, wherein: An oil output valve (65) is fixedly connected to the bottom end of the gas supply base (64), and the oil output valve (65) is connected to the oil accumulation chamber (612).

7. The screw water chiller of claim 1, wherein: The screw compressor (2) is provided with an oil separator (3), a condenser (4) and a support frame (5). The oil separator (3) is connected to the screw compressor (2). One end of the condenser (4) is connected to the oil separator (3). One end of the condenser (4) is connected to the expansion valve and then connected to the evaporator (1). The support frame (5) is used to support the evaporator (1) and the condenser (4).

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