Compressor screw and screw compressor, air conditioner

Abstract

The utility model provides a kind of compressor screw rod and screw rod compressor, air conditioner, wherein compressor screw rod includes stem and the rotor of being located stem, rotor inside is equipped with between its suction end and the liquid supply passage extending of exhaust end, and several through the liquid injection passage of tooth groove surface and liquid supply passage, liquid injection passage includes the liquid outlet section and liquid inlet section of connecting tooth groove surface and liquid supply passage respectively and the variable diameter section of connecting liquid outlet section and liquid inlet section;Compressor screw rod further includes movable stop block, is located in variable diameter section and is connected in liquid injection passage interior by reset piece, movable stop block size is greater than the size of liquid outlet section and variable diameter section junction and liquid inlet section and variable diameter section junction;In the process that tooth groove rotates cyclically with rotor and inhales and exhausts, movable stop block reciprocates between liquid outlet section and liquid inlet section to open and close liquid injection passage under the differential pressure change of liquid outlet section and liquid inlet section and the action of reset piece, realize that the volume between rotor teeth from suction to the end process of internal compression is uninterrupted, and liquid injection is adaptively changed with the differential pressure of two sides.

Description

TECHNICAL FIELD

[0001] The utility model relates to a compressor technical field especially relates to a kind of compressor screw rod and screw rod compressor, air conditioner. BACKGROUND

[0002] Oil-free screw compressor refers to its rotor cavity is completely oil-free, to ensure the purity of compressed gas. Because of adopting oil-free design, the tooth top clearance of screw rotor, meshing clearance cannot form oil film to reduce leakage, at the same time cannot be lubricated and cooled by oil film, so that the rotor temperature and gas temperature during compression process can be very high, especially in the exhaust end of larger pressure, thereby causing the stability and service life of oil-free screw compressor to reduce.

[0003] The existing conventional solution is to open some hole positions on the shell as oil-injected screw compressor, and to inject the same type of gas or liquid into the hole during compression process to achieve cooling and lubrication. For example, water vapor compressor is usually drilled on the shell to spray water into the rotor cavity to reduce exhaust temperature and reduce leakage. However, the scheme of spraying water from the shell into the rotor cavity has two shortcomings, one is that each tooth groove of a single rotor can only contact water in a specific position and a specific range of rotation angle, and once the rotor rotates through the water injection hole, the tooth groove cannot be watered and cooled. Two is that when the corresponding tooth groove starts to inhale and compress, the rotor temperature is low, the pressure difference between the tooth grooves is low, and the gas leakage in the tooth groove is small, so it is not necessary to spray water or spray a lot of water to avoid increasing the power consumption of the compressor. When the corresponding tooth groove is close to the exhaust side but has not yet been exhausted, the rotor temperature rises, the gas leakage in the tooth groove increases, and the water injection amount should be increased. When the tooth groove reaches the exhaust side and exhausts, water injection should be stopped to prevent liquid from being carried by the exhaust.

[0004] Therefore, a solution appears in the prior art by installing throttle plugs with different hole diameters on different hole positions to control the water injection flow, but this method has three shortcomings, one is that it needs to connect multiple pipelines to the shell, which complicates the structure of the compressor, two is that it is usually not possible to machine a water injection hole near the exhaust side due to the bearing structure of the screw compressor, which makes it impossible to achieve water injection cooling at the exhaust side of the rotor where water injection is most needed. Three is that the water injection range of this scheme can only be concentrated on a certain section of the rotor, and it is still not possible to achieve uninterrupted water injection for each tooth groove during the full rotation angle. In summary, the conventional scheme usually only injects enough water into the tooth groove near the suction side when the suction just ends, and does not inject water into the tooth groove during the subsequent rotation process, which results in insufficient water injection to reduce gas leakage in each tooth groove of the rotor, reduce rotor and exhaust temperature, and increase the lubrication effect between the teeth. SUMMARY

[0005] The utility model provides a kind of compressor screw rod and screw rod compressor and air conditioner applying it, to solve the technical problem that the liquid injection structure of traditional oil-free screw compressor cannot realize full rotation angle liquid injection to rotor tooth groove.

[0006] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0007] This utility model provides a compressor screw, including a rod and a rotor disposed on the rod. The rotor has a liquid supply channel extending between its suction end and discharge end, and a plurality of liquid spraying channels penetrating the tooth groove surface and the liquid supply channel. The liquid spraying channel includes a liquid outlet section and a liquid inlet section respectively connecting the tooth groove surface and the liquid supply channel, and a variable diameter section connecting the liquid outlet section and the liquid inlet section.

[0008] The compressor screw also includes:

[0009] A movable stop is located inside the variable diameter section and connected to the inside of the spray channel via a reset component. The size of the movable stop is larger than the size of the connection between the liquid outlet section and the variable diameter section, as well as the size of the connection between the liquid inlet section and the variable diameter section.

[0010] During the process of the toothed groove rotating with the rotor to perform cyclic intake and exhaust, the movable stop block reciprocates between the liquid outlet section and the liquid inlet section under the pressure difference change and the action of the reset component to open and close the liquid spraying channel.

[0011] Preferably, the variable diameter section includes:

[0012] The first transition end is connected to the liquid outlet section, and the radial dimension of the first transition end gradually increases in the direction away from the liquid outlet section.

[0013] The second transition end is connected to the liquid inlet section, and the radial dimension of the second transition end gradually increases in the direction away from the liquid inlet section.

[0014] The intermediate sizing cavity is connected between the side of the first transition end away from the liquid outlet section and the side of the second transition end away from the liquid inlet section, and the radial dimensions of the side of the first transition end away from the liquid outlet section, the side of the second transition end away from the liquid inlet section, and the intermediate sizing cavity are equal.

[0015] The size of the movable stop is larger than the radial dimension of the first transition end near the liquid outlet section and the second transition end near the liquid inlet section, and the size of the movable stop is smaller than the radial dimension of the intermediate sizing cavity.

[0016] Furthermore, the compressor screw also includes:

[0017] The plug is located in the liquid outlet section and has a drainage channel for liquid discharge. The reset component is connected between the plug and the movable stop.

[0018] Preferably, the inner wall of the liquid outlet section is provided with internal threads, and the outer wall of the plug is provided with external threads that match the internal threads. The plug is screwed into the liquid outlet section through the external threads and the internal threads.

[0019] Preferably, the reset element is a reset spring.

[0020] Preferably, the rotor has multiple sets of spray channels evenly spaced along its axial direction.

[0021] Preferably, the end of the rod near the exhaust end is provided with a liquid supply hole that connects to the liquid supply channel for introducing liquid.

[0022] This utility model also provides a screw compressor, wherein the male screw and / or female screw of the screw compressor adopts the above-mentioned compressor screw.

[0023] Preferably, the screw compressor is an oil-free screw compressor.

[0024] This utility model also provides an air conditioner, including the above-mentioned screw compressor.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The compressor screw and the oil-free screw compressor using the present invention can realize uninterrupted liquid injection from the intake to the end of internal compression of the rotor tooth volume, and can adaptively adjust the injection volume according to the pressure difference between the supply and injection sides, thus realizing low leakage, low discharge temperature, low loss and high efficiency operation of the oil-free screw compressor. Attached Figure Description

[0027] To more clearly illustrate the technical solution proposed by this utility model, the present utility model will be described in detail below with reference to the embodiments and accompanying drawings. It should be understood that the embodiments and accompanying drawings described in the following detailed description are merely some embodiments of this utility model, and those skilled in the art can make changes to these drawings under the concept of this utility model.

[0028] Figure 1 A three-dimensional structural schematic diagram of an embodiment of the compressor screw provided by this utility model;

[0029] Figure 2 A cross-sectional structural schematic diagram of an embodiment of the compressor screw provided by this utility model applied to an oil-free screw compressor;

[0030] Figure 3 for Figure 1 A magnified schematic diagram of a portion of region A in the diagram;

[0031] Figure 4 for Figure 1 A magnified schematic diagram of the local structure of region B in the diagram;

[0032] Figure 5 for Figure 1 A magnified schematic diagram of the local structure of region C in the diagram;

[0033] Figure 6 forFigure 1 A magnified schematic diagram of the local structure of region D in the diagram.

[0034] The main markings in the attached figures are as follows:

[0035] 1. Rod section;

[0036] 11. Liquid supply port;

[0037] 2. Rotor;

[0038] 21. Inhalation end;

[0039] 22. Exhaust end;

[0040] 23. Glandular groove;

[0041] 3. Liquid supply channel;

[0042] 4. Spray channel;

[0043] 41. Liquid outlet section;

[0044] 42. Liquid inlet section;

[0045] 43. Variable diameter section;

[0046] 431. First transition end;

[0047] 432. Second transition end;

[0048] 433. Intermediate sizing cavity;

[0049] 5. Movable stop;

[0050] 51. Circular slot;

[0051] 6. Reset component;

[0052] 7. Plug;

[0053] 8. Casing. Detailed Implementation

[0054] To make the technical problem to be solved, the technical solution and the beneficial effects of this utility model clearer, the following description is provided in conjunction with the appendix. Figures 1-6 The present invention will be further described in detail with reference to the embodiments.

[0055] Please refer to the following: Figures 1-6The compressor screw provided by this utility model includes a rod portion 1 for transmission and a rotor 2 disposed on the rod portion 1. The rotor 2 has a liquid supply channel 3 extending between the suction end 21 and the discharge end 22 of the rotor 2, and a plurality of liquid spraying channels 4 penetrating the surfaces of each tooth groove 23 of the rotor 2 and the liquid supply channel 3. The liquid spraying channel 4 includes an outlet section 41 and an inlet section 42 respectively connecting the surfaces of the corresponding tooth groove 23 and the liquid supply channel 3, and a variable diameter section 43 connecting the outlet section 41 and the inlet section 42. The radial dimension of the variable diameter section 43 is larger than the radial dimension of the outlet section 41 and the inlet section 42.

[0056] The compressor screw also includes:

[0057] The movable stop 5 is located inside the variable diameter section 43 and connected to the inside of the liquid spraying channel 4 via the reset member 6. The size of the movable stop 5 in the corresponding direction is larger than the size of the connection between the liquid outlet section 41 and the variable diameter section 43 and the connection between the liquid inlet section 42 and the variable diameter section 43.

[0058] During the process of each tooth groove 23 rotating with the rotor 2 to circulate between the angular positions near the intake end 21 and the exhaust end 22 to perform intake and exhaust operations, the movable baffle 5 in the variable diameter section 43 reciprocates between the liquid outlet section 41 and the liquid inlet section 42 under the pressure difference change of the liquid outlet section 41 and the liquid inlet section 42 and the action of the reset member 6. When the movable baffle 5 rotates from the start of intake (connecting the intake port) to the end of intake (disengaging from the intake port) of the corresponding tooth groove 23, since the intake pressure of the tooth groove 23 on the side of the liquid outlet section 41 is less than the liquid supply pressure in the liquid supply channel 3 on the side of the liquid inlet section 42 plus the force of the reset member 6 (opposite to the pressure direction of the tooth groove 23), the movable baffle is forced to block the liquid outlet section 41 (blocking the connection between the liquid outlet section 41 and the variable diameter section 43), keeping the liquid spray channel 4 closed and sealed.

[0059] As the tooth groove 23 rotates to the point where it begins to compress gas (the tooth surface abuts against the inner wall of the housing 8) and continues to rotate until it is about to connect to the exhaust port, the gas pressure of the tooth groove 23 on the liquid outlet section 41 side gradually increases until the gas pressure of the tooth groove 23 is greater than the liquid supply pressure in the liquid supply channel 3 on the liquid inlet section 42 side plus the force of the reset piece 6. This causes the movable stop block 5 to be forced to detach from the liquid outlet section 41 and move closer to the liquid inlet section 42. At this time, the liquid spraying channel 4 opens, and the liquid supply channel 3 begins to perform liquid spraying operation on the tooth groove 23 through the liquid spraying channel 4.

[0060] When the tooth groove 23 rotates to the point where exhaust begins (connecting to the exhaust port), the pressure of the tooth groove 23 on the liquid section side has reached the exhaust pressure. At this time, the exhaust pressure of the tooth groove 23 on the liquid outlet section 41 side is greater than the liquid supply pressure in the liquid supply channel 3 on the liquid inlet section 42 side plus the force of the reset piece 6. This causes the movable stop block 5 to be forced to block the liquid inlet section 42 (blocking the connection between the liquid inlet section 42 and the variable diameter section 43), keeping the liquid spraying channel 4 closed and sealed to avoid liquid being carried in during exhaust.

[0061] Therefore, the compressor screw provided by this utility model enables the movable stop block 5 to block the liquid outlet section 41 and the liquid inlet section 42 respectively at the beginning and end of the intake of the corresponding tooth groove 23 and at the beginning of the exhaust, thereby closing the liquid spraying channel 4 and the liquid supply channel 3 to stop the liquid spraying into the tooth groove 23, and opening the liquid spraying channel 4 and the liquid supply channel 3 to continuously spray liquid into the tooth groove 23 during the compression process of the corresponding tooth groove 23, thus solving the problem that the traditional oilless screw compressor liquid spraying structure cannot achieve full rotation angle liquid spraying into the rotor 2 tooth groove 23.

[0062] Please refer to the following: Figures 1-6 In this embodiment, both the liquid outlet section 41 and the liquid inlet section 42 are fixed-diameter sections with fixed radial dimensions at each location.

[0063] The variable diameter section 43 includes:

[0064] The first transition end 431 has one end connected to the liquid outlet section 41. The radial dimension of the first transition end 431 relative to the other end of the liquid outlet section 41 gradually increases in the direction away from the liquid outlet section 41 (while being close to the liquid inlet section 42), and the radial dimension of the side of the first transition end 431 close to the liquid outlet section 41 is equal to the radial dimension of the liquid outlet section 41.

[0065] The second transition end 432 has one end connected to the liquid inlet section 42. The radial dimension of the second transition end 432 relative to the other end of the liquid inlet section 42 gradually increases in the direction away from the liquid inlet section 42 (while being closer to the liquid outlet section 41), and the radial dimension of the side of the second transition end 432 close to the liquid inlet section 42 is equal to the radial dimension of the liquid inlet section 42.

[0066] The intermediate sizing cavity 433 is a sizing cavity with fixed radial dimensions at each point. It is connected between the side of the first transition end 431 away from the liquid outlet section 41 (near the liquid inlet section 42) and the side of the second transition end 432 away from the liquid inlet section 42 (near the liquid outlet section 41). The radial dimensions of the side of the first transition end 431 away from the liquid outlet section 41, the side of the second transition end 432 away from the liquid inlet section 42, and the intermediate sizing cavity 433 are equal.

[0067] The size of the movable stop 5 in the corresponding direction is greater than the radial size of the first transition end 431 near the liquid outlet section 41 and the second transition end 432 near the liquid inlet section 42, and the size of the movable stop 5 is smaller than the radial size of the intermediate sizing cavity 433.

[0068] During the process of each tooth groove 23 rotating with the rotor 2 to circulate between angular positions near the intake end 21 and the exhaust end 22, thereby performing intake and exhaust operations, the movable stop 5 in the variable diameter section 43 (including the first transition end 431, the intermediate sizing cavity 433, and the second transition end 432) reciprocates between the liquid outlet section 41 and the liquid inlet section 42 under the pressure difference change between the liquid outlet section 41 and the liquid inlet section 42 and the action of the reset member 6. The specific force and action process of each stage is as follows:

[0069] When the corresponding tooth groove 23 rotates from the start of air intake (connecting to the air intake port) to the end of air intake (disconnecting from the air intake port), since the air intake pressure of the tooth groove 23 on the liquid outlet section 41 side is less than the liquid supply pressure in the liquid supply channel 3 on the liquid inlet section 42 side plus the force of the reset member 6, the movable stop block 5 is forced to abut against the wall surface of the first transition end 431 near the liquid outlet section 41, thereby blocking the liquid outlet section 41 and keeping the spray channel 4 closed and sealed. At this time, the liquid supply channel 3 does not spray liquid into the tooth groove 23.

[0070] When the tooth groove 23 rotates to the point where it begins to compress gas (the tooth surface abuts against the inner wall of the housing 8), the gas pressure of the tooth groove 23 on the liquid outlet section 41 side gradually increases until the gas pressure of the tooth groove 23 is greater than the liquid supply pressure in the liquid supply channel 3 on the liquid inlet section 42 side plus the force of the reset member 6. This causes the movable stop 5 to be forced to detach from the wall of the first transition end 431 near the liquid outlet section 41, while simultaneously opening the liquid outlet section 41 and moving closer to the liquid inlet section 42. At this time, the spray channel 4 opens. Since the movable stop 5 is still within the first transition end 431 where the radial dimension gradually changes, the flow area of ​​the spray channel 4 is small. The liquid supply channel 3 begins to perform a small-flow spray operation on the tooth groove 23 with a gradually increasing flow rate through the spray channel 4.

[0071] As the toothed groove 23 continues to rotate until it is about to connect to the exhaust port, the gas pressure of the toothed groove 23 on the liquid outlet section 41 side continues to increase and continues to move closer to the liquid inlet section 42 until the movable stop 5 is forced to detach from the first transition end 431 and completely enters the intermediate sizing cavity 433 with a fixed radial dimension. At this time, the toothed groove 23 is about to connect to the exhaust port, and the pressure of the toothed groove 23 on the liquid outlet section 41 side is about to increase to the internal compression final pressure. At the same time, the flow area of ​​the liquid spraying channel 4 reaches its maximum value, and the liquid supply channel 3 begins to perform a large-flow liquid spraying operation on the toothed groove 23 through the liquid spraying channel 4.

[0072] When the tooth groove 23 rotates to the point where exhaust begins (connecting to the exhaust port), the pressure of the tooth groove 23 on the liquid section side has reached the exhaust pressure (slightly less than the internal compression final pressure). At this time, the exhaust pressure of the tooth groove 23 on the liquid outlet section 41 side is greater than the liquid supply pressure in the liquid supply channel 3 on the liquid inlet section 42 side plus the force of the reset member 6. This causes the movable stop block 5 to be forced against the wall surface of the second transition end 432 near the liquid inlet section 42, thereby blocking the liquid inlet section 42 and keeping the spray channel 4 closed and sealed to avoid liquid being carried in during exhaust.

[0073] Please refer to the following: Figures 1-6 In this embodiment, the compressor screw is a male screw, and its rotor 2 is a male rotor with five toothed slots 23. When one of the toothed slots 23 rotates to the point where exhaust begins (connecting to the exhaust port), the other toothed slot 23 on the front side of its rotation direction is connected to the exhaust port and points towards the exhaust operation. The force and movement of the movable stop 5 in the corresponding liquid injection channel 4 are consistent with the movable stop 5 corresponding to the toothed slot 23 that rotates to the point where exhaust begins (connecting to the exhaust port).

[0074] Please refer to the following: Figures 2-6 In a preferred embodiment of this invention, the length of the first transition end 431 is greater than the length of the second transition end 432.

[0075] Please refer to the following: Figures 2-6 In this embodiment, the compressor screw further includes:

[0076] The plug 7 is located in the liquid outlet section 41. The plug 7 has a liquid outlet channel for liquid to flow from the variable diameter section 43 to the corresponding tooth groove 23 on the outside of the rotor 2 to be discharged from the liquid spraying channel 4. The reset member 6 is connected between the plug 7 and the movable stop block 5.

[0077] Please refer to the following: Figures 2-6 In a preferred embodiment of this invention, the inner wall of the liquid outlet section 41 is provided with an internal thread, and the outer wall of the plug 7 is provided with an external thread that matches the internal thread. The plug 7 is screwed into the liquid outlet section 41 through the external thread and the internal thread.

[0078] Please refer to the following: Figures 2-6 In a preferred embodiment of this invention, the plug 7 is hollow and thin-walled, and the aforementioned drainage channel is formed on the hollow inner side of the plug 7.

[0079] Please refer to the following: Figures 2-6 In a preferred embodiment of this invention, the reset element 6 is a reset spring.

[0080] In other embodiments, the reset element 6 may also be a reset spring.

[0081] Please refer to the following: Figures 2-6 As a preferred embodiment of this invention, the movable stop 5 is provided with an annular groove 51, and one end of the reset spring is engaged in the annular groove 51.

[0082] Please refer to the following: Figures 1-6 In this embodiment, the rotor 2 is evenly spaced along its axial direction with multiple sets of spray channels 4. Each set of spray channels 4 includes several spray channels 4 that match the number of tooth grooves 23 of the rotor 2, so as to ensure that the rotor 2 can spray liquid at all points in the spiral direction of each tooth groove 23.

[0083] Please refer to the following:Figures 2-6 In one embodiment, the area of ​​the tooth groove 23 near the suction end 21 does not require a liquid spraying channel 4 because the cooling requirement is low.

[0084] Please refer to the following: Figures 2-6 In this embodiment, the end of the rod 1 near the exhaust end 22 is provided with a liquid supply hole 11 that connects to the liquid supply channel 3, which is used to supply liquid from an external liquid pipeline to the liquid supply channel 3 through the liquid supply hole 11.

[0085] In this embodiment, the liquid introduced into the liquid supply channel 3 can be water or liquid refrigerant.

[0086] As a preferred embodiment of this example, the liquid introduced into the liquid supply channel 3 is a liquid refrigerant that flows out of the condenser of the air conditioner and is introduced into the rotor 2 after being throttled. Its liquid pressure is greater than the suction pressure of the tooth groove 23 and slightly lower than the internal compression final pressure.

[0087] Please refer to the following: Figures 2-6 In this embodiment, the liquid outlet section 41, the liquid inlet section 42, the intermediate sizing cavity 433, the second transition end 432, the liquid supply channel 3, the liquid supply hole 11, and the movable stop block 5 are all cylindrical, and the first transition end 431 and the second transition end 432 are both frustum-shaped (the shape after the cone is cut off).

[0088] Please see Figure 1 This utility model also provides a screw compressor, wherein the male screw and / or female screw of the screw compressor adopts the above-mentioned compressor screw.

[0089] Please see Figure 1 In this embodiment, the screw compressor is an oil-free screw compressor.

[0090] This utility model also provides an air conditioner, including the above-mentioned screw compressor.

[0091] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Those skilled in the art should understand that any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A compressor screw, comprising a rod portion (1) and a rotor (2) disposed on said rod portion (1), characterized in that, The rotor (2) has a liquid supply channel (3) extending between its intake end (21) and exhaust end (22) and a plurality of liquid spraying channels (4) penetrating the surface of the tooth groove (23) and the liquid supply channel (3). The liquid spraying channel (4) includes an outlet section (41) and an inlet section (42) connecting the surface of the tooth groove (23) and the liquid supply channel (3) respectively, and a variable diameter section (43) connecting the outlet section (41) and the inlet section (42). The compressor screw also includes: The movable stop (5) is located inside the variable diameter section (43) and connected to the inside of the spray channel (4) via the reset member (6). The size of the movable stop (5) is larger than the size of the connection between the liquid outlet section (41) and the variable diameter section (43) and the connection between the liquid inlet section (42) and the variable diameter section (43). During the process of the tooth groove (23) rotating with the rotor (2) to perform cyclic intake and exhaust, the movable stop (5) reciprocates between the liquid outlet section (41) and the liquid inlet section (42) under the pressure difference change of the liquid outlet section (41) and the liquid inlet section (42) and the action of the reset member (6) to open and close the liquid spraying channel (4).

2. The compressor screw as described in claim 1, characterized in that, The variable diameter section (43) includes: A first transition end (431) is connected to the liquid outlet section (41), and the radial dimension of the first transition end (431) gradually increases in the direction away from the liquid outlet section (41); The second transition end (432) is connected to the liquid inlet section (42), and the radial dimension of the second transition end (432) gradually increases in the direction away from the liquid inlet section (42); The intermediate sizing cavity (433) is connected between the side of the first transition end (431) away from the liquid outlet section (41) and the side of the second transition end (432) away from the liquid inlet section (42), and the radial dimensions of the side of the first transition end (431) away from the liquid outlet section (41), the side of the second transition end (432) away from the liquid inlet section (42) and the intermediate sizing cavity (433) are equal; The size of the movable stop (5) is greater than the radial dimension of the first transition end (431) near the liquid outlet section (41) and the second transition end (432) near the liquid inlet section (42), and the size of the movable stop (5) is smaller than the radial dimension of the intermediate sizing cavity (433).

3. The compressor screw as described in claim 1, characterized in that, Also includes: A plug (7) is provided in the liquid outlet section (41). The plug (7) is provided with a liquid discharge channel for liquid discharge. The reset member (6) is connected between the plug (7) and the movable stop (5).

4. The compressor screw as described in claim 3, characterized in that, The inner wall of the liquid outlet section (41) is provided with an internal thread, and the outer wall of the plug (7) is provided with an external thread that matches the internal thread. The plug (7) is screwed into the liquid outlet section (41) through the external thread and the internal thread.

5. The compressor screw according to any one of claims 1-3, characterized in that, The reset component (6) is a reset spring.

6. The compressor screw according to any one of claims 1-3, characterized in that, The rotor (2) has multiple sets of spray channels (4) evenly spaced along its axial direction.

7. The compressor screw according to any one of claims 1-3, characterized in that, The rod (1) has a liquid supply hole (11) at one end near the exhaust end (22) that connects to the liquid supply channel (3) for introducing liquid.

8. A screw compressor, characterized in that, The male screw and / or female screw of the screw compressor are compressor screws as described in any one of claims 1-7.

9. The screw compressor as described in claim 8, characterized in that, The screw compressor is an oil-free screw compressor.

10. An air conditioner, characterized in that, Including the screw compressor as described in claim 8 or 9.

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