TW202115316A - Screw compressor - Google Patents

Abstract

A screw compressor including a body having a compression chamber, a screw set disposed in the compression chamber, a first adjusting member movably disposed above the screw set to form an outlet, and a second adjusting member is provided. A fluid is adapted to flow into the compression chamber to be compressed by the screw set and the fluid flows out of the compression chamber via an outlet after being compressed, wherein a location of the outlet is changed according to a movement of the first adjusting member relative to the screw set. The second adjusting member is movably disposed in the compression chamber to contact with or leave from the first adjusting member and regulates a compressible volume of the fluid in the compression chamber.

Description

Screw compressor

The present invention relates to a compressor, and particularly relates to a screw compressor.

With the development of industrialization, people's demand for air conditioners and refrigeration equipment is increasing day by day, and many types of compressors have been developed.

In the case of a screw compressor, the screw compresses the gas and covers the adjusting member on the screw. The recess of the adjusting member corresponds to the exhaust portion of the screw, and the volume can be adjusted by changing the size of the recess ratio. Under this adjustment method, additional mold openings are needed to manufacture adjustment parts with different sizes of recesses, which will increase the manufacturing cost. At the same time, the screw compressor does not always need to be in a full load state, and often needs to be different depending on conditions such as the ambient temperature, the volume of the refrigerant, and the compression ratio formed before and after compression.

Accordingly, how to provide a screw compressor with adjustable compression ratio and volume so as to effectively improve the performance of the current compressor is actually a problem that relevant technicians need to think about and solve.

The invention provides a screw compressor, which adjusts the compressible volume and compression ratio of the fluid in the compression process by an adjusting member, so as to improve the efficiency of the screw compressor and achieve the effect of energy saving.

The screw compressor of the present invention includes a body, a screw group, a first adjusting part and a second adjusting part. The machine body has a compression cavity, the screw group is arranged in the compression cavity, and the fluid is suitable for flowing into the compression cavity to be compressed by the screw group. The first adjusting member is movably arranged above the screw group. The first adjusting member and the screw group form an outlet. The fluid compressed by the screw group is suitable for flowing out of the compression chamber from the outlet, and the outlet is relative to the screw group along with the first adjusting member. Move to change position. The second adjusting member is movably disposed in the compression cavity to abut against or separate from the first adjusting member, so as to adjust the compressible volume of the fluid in the compression cavity.

The screw compressor of the present invention includes a body and at least one first compression module. The body has a plurality of compression cavities, and the first compression module is disposed in at least one of the compression cavities. The first compression module includes a screw group, a first adjustment member, and at least one second adjustment member. The screw group is arranged in the compression cavity, and the fluid is suitable for flowing into the compression cavity to be compressed by the screw group. The first adjusting member is movably arranged above the screw group. The first adjusting member and the screw group form an outlet. The fluid compressed by the screw group is suitable for flowing out of the compression chamber from the outlet. The outlet moves as the first adjusting member moves relative to the screw group. Change location. The second adjusting member is movably disposed in the compression cavity to abut against or separate from the first adjusting member, so as to adjust the compressible volume of the fluid in the compression cavity.

In an embodiment of the present invention, the above-mentioned first adjusting member covers the screw group to form a first area in the compression cavity, and the second adjusting member covers the screw group to form a second area in the compression cavity. When the second adjusting member abuts against the first adjusting member, the parts of the screw group in the first area and the second area form a compression area of the fluid in the compression chamber. When the second adjusting member is separated from the first adjusting member, the screw group forms a compression area of the fluid in the compression chamber only in the first section.

In an embodiment of the present invention, the range of the above-mentioned first region is related to the compression ratio of the fluid in the compression chamber.

In an embodiment of the present invention, the range of the aforementioned second area is related to the compressible volume of the fluid in the compression chamber.

In an embodiment of the present invention, the aforementioned compression chamber further has a third area, and the second adjusting member is located between the second area and the third area. When the second adjusting member abuts against the first adjusting member, the second adjusting member isolates the second area and the third area. When the second adjusting member is separated from the first adjusting member, the second area is connected to the third area.

In an embodiment of the present invention, the above-mentioned second adjusting member moves relative to the screw group to cover the screw group or separate from the screw group.

In an embodiment of the present invention, the above-mentioned screw compressor further includes a plurality of driving modules, which are respectively disposed on the machine body and connected to the first adjusting member and the second adjusting member.

In an embodiment of the present invention, the above-mentioned driving module includes a piston and a driving rod, the piston is movably arranged in a chamber of the body, and the driving rod is connected between the piston and the first adjusting member, or connected between the piston and the second adjusting member. Between adjustment pieces.

In an embodiment of the present invention, the above-mentioned screw compressor further includes a third adjusting member, which is movably disposed in the compression chamber to abut against or separate from the second adjusting member.

In an embodiment of the present invention, a part of the above-mentioned second adjustment piece passes through the third adjustment piece, so that the second adjustment piece is located between the third adjustment piece and the first adjustment piece, and the second adjustment piece is separated from the first adjustment piece. When adjusting the adjusting member, the third adjusting member is also driven to move away from the first adjusting member.

In an embodiment of the present invention, the above-mentioned body has a first compression cavity and at least one second compression cavity, the first compression module is disposed in the first compression cavity, and the screw compressor further includes at least one second compression cavity The group is arranged in the second compression chamber. After the uncompressed fluid flows into the body, it is compressed by the first compression module and the second compression module in sequence and then discharged from the body.

In an embodiment of the present invention, the above-mentioned second compression module includes another screw group.

In an embodiment of the present invention, the above-mentioned second compression module includes another screw group and another first adjusting member.

In an embodiment of the present invention, the above-mentioned screw compressor includes a plurality of first compression modules, which are respectively disposed in the compression chambers.

Based on the above, in the compression chamber of the screw compressor, in addition to the screw group for compressing the fluid, a movable first adjusting member and a second adjusting member are provided corresponding to the screw group, wherein the first adjusting member and the second adjusting member The screw group forms an outlet to facilitate the fluid to exit the compression chamber from the outlet after being compressed, and the outlet can change its position along with the movement of the first adjusting member. Furthermore, the second adjusting member can move relative to the first adjusting member to abut or disengage from the first adjusting member. Therefore, the corresponding state of the second adjusting member relative to the first adjusting member can be used to adjust the fluidity in the compression chamber. Compressed volume.

Accordingly, the screw compressor can perform corresponding adjustment actions on the compression module composed of the screw group, the first adjusting member and the second adjusting member by sensing the pressure or the saturation temperature of the fluid, and then The state of the compression module can meet the demand, that is, the compression module can have an operation mode that can correspond to different needs, and accordingly, the adaptability and working efficiency of the screw compressor can be improved, and thus the effect of energy saving can be achieved.

Fig. 1 is a partial cross-sectional view of a screw compressor according to an embodiment of the present invention, in which only relevant components are provided with cross-sectional lines to facilitate discrimination. Fig. 2 is a schematic diagram of the connection relationship of related components of the screw compressor of Fig. 1. 3 to 5 are schematic diagrams of the system of the screw compressor of Fig. 1 respectively, and provide a simple schematic diagram of the screw compressor of Fig. 1 in different states, and arrows represent the direction of the fluid. 1 to 3, in this embodiment, the screw compressor 100 includes a body 150 and a first compression module V1, wherein the body 150 has a first compression cavity 151 and a second compression cavity 152, and the first compression cavity The compression module V1 is disposed in the first compression cavity 151. The first compression module V1 includes a screw group 141, a first adjusting member 110, and a second adjusting member 120. The fluid that is not compressed in the external environment is adapted to flow into the first compression chamber 151 through the inlet E1 of the body 150 to receive the screw group 141. Compression. Furthermore, the screw compressor 100 further includes a second compression module V2, which is disposed in the second compression chamber 152, and the fluid compressed by the first compression module V1 is suitable for flowing into the second compression chamber 152 and then by the second compression module. Compressed by group V2. Here, the second compression module V2 includes another screw group 142 and another first adjusting member 130. The fluid entering the second compression chamber 152 will be compressed again by the screw group 142, and then discharged from the body 150 through the outlet E2. Here, the screw groups 141 and 142 are directly driven or indirectly driven by the driving module 170 (for example, a motor). In this embodiment, the screw group 141 is substantially arranged on the X-Y plane, and the screw group 142 is substantially arranged on the Y-Z plane. It should also be mentioned that although this embodiment takes a two-stage compressor as an example, it does not limit the types of compressors that can be applied to the first compression module V1.

Please refer to FIGS. 1, 3, and 4 again. In the first compression module V1 of this embodiment, the screw group 141 is disposed in the first compression chamber 151, and the first adjusting member 110 is movably disposed on the screw along the Y axis. The group 141 is above and close to the screw group 141, and the first adjusting member 110 and the screw group 141 form an outlet E11. The fluid compressed by the screw group 141 is suitable to flow out of the first compression chamber 151 from the outlet E11 (and flow into the second compression chamber through the inlet E12). Cavity 152), the outlet E11 will change position as the first adjusting member 110 moves relative to the screw group 141 (please refer to Figure 3 and Figure 4, the first adjusting member 110, 130 changes the position of the outlet E11, E2 due to the movement) . Furthermore, the first adjusting member 110 has a recessed structure. When the first adjusting member 110 covers the screw group 141, the first adjusting member 110 and the part of the screw group 141 covered by the first adjusting member 110 form the first compression chamber 151 The recessed structure and the screw group 141 form the outlet E11, that is, the fluid will be compressed by the screw group 141 in the first area 151a and exit the first compression chamber 151 from the outlet E11.

Here, the range of the first area 151a in the first compression chamber 151 is related to the compression ratio of the fluid in the first compression chamber 151, that is, as the first adjusting member 110 moves, the outlet E11 is on the screw group 141 The position will affect the compression ratio when the fluid is compressed. Similarly, for the second compression module V2 of the present embodiment, the first adjustment member 130 also operates like the aforementioned first adjustment member 110 to cause the outlet E2 to change its position accordingly to adjust the compression ratio of the fluid. This will not be repeated here. Based on the above, the user can change the compression ratio when the fluid is compressed by adjusting the first adjusting members 110 and 130 of the screw compressor 100 to meet the requirements.

On the other hand, please refer to FIGS. 1, 3, and 5 again. In the first compression chamber 151 of this embodiment, the second adjustment member 120 is movably disposed in the first compression chamber along the Y axis to abut the first adjustment member 110. Or detach from the first adjusting member 110 to adjust the compressible volume of the fluid in the first compression chamber 151. In detail, the second adjusting member 120 of this embodiment covers and is close to the screw group 141 to form the second area 151b in the first compression cavity 151. Here, the range of the second region 151b is related to the compressible volume of the fluid in the first compression chamber 151. When the second adjusting member 120 moves to and abuts against the first adjusting member 110, the portion of the screw group 141 in the first area 151a and the second area 151b forms a compression area of the fluid in the first compression chamber 151, as shown in FIG. 3 Show. In other words, the fluid moving into the first compression chamber 151 at this time will be confined to the first area 151a and the second area 151b and must be compressed by the screw group 141. On the contrary, when the second adjusting member 120 is separated from the first adjusting member 110, as shown in FIG. 5, the screw group 141 only forms the compression area of the fluid in the first compression chamber 151 in the part of the first section 151a, that is, The fluid at this time is compressed by the screw group 141 only in the portion confined to the first region 151a.

Furthermore, the first compression chamber 151 also has a third area 151c, and the second adjusting member 120 is located between the second area 151b and the third area 151c. When the second adjusting member 120 abuts the first adjusting member 110, the second adjusting member 120 isolates the second area 151b from the third area 151c, and when the second adjusting member 120 separates from the first adjusting member 110, the second area 151b will connect to the third area 151c. In other words, the third area 151c can be regarded as the pressure relief area of the fluid in the first compression chamber 151, and the separation of the second adjusting member 120 from the first adjusting member 110 will cause the fluid that should be compressed by the screw assembly 141 to escape from the second The area 151b is moved away to release the state that the fluid in the second area 151b must be compressed, which is equivalent to reducing the compressible volume of the fluid in the first compression chamber 151. Accordingly, the user can adjust the compressible volume of the fluid in the first compression chamber 151 by controlling the movement of the second adjusting member 120 relative to the first adjusting member 110, and then adjust the screw group 141 so that the drive module 170 Load status.

1 again, in this embodiment, the screw compressor 100 further includes a control module 180 and a plurality of driving modules 161, 162, 163, wherein the control module 180 is electrically connected to the driving module 170 to drive the screw The groups 141, 142, and the control module 180 are also electrically connected to the driving modules 161, 162, and 163 to control the movement of the first adjusting member 110, the second adjusting member 120, and the other first adjusting member 130. Furthermore, the driving modules 161, 162, and 163 are structurally connected to the first adjusting member 110, the second adjusting member 120, and the first adjusting member 130, respectively. Here, the driving modules 161, 162, and 162 have the same component composition. Taking the driving module 161 as an example, it includes a piston 161a and a driving rod 161b. The piston 161a is movably disposed in the chamber 153 of the body 150, and the driving rod 161b It is connected between the piston 161a and the first adjusting member 110. Here, the control module 180 can drive the piston 161a to move in the chamber 153 by controlling the air pressure source (not shown) of the driving module 161, so as to adjust the position of the first adjusting member 110 in the first compression chamber 151. position. The operation of the driving modules 162 and 163 is the same as the above-mentioned actions, and will not be repeated here. It should also be mentioned that the air pressure source is not limited here. In one embodiment, the compressed fluid generated by the screw compressor 100 can be split to serve as the required air pressure source. In another embodiment In the middle, the required air pressure source can also be externally connected.

The following briefly describes the operating states of the screw compressor 100 shown in FIGS. 3 to 5 according to different operating conditions. It should be mentioned first that the first compression module V1 of this embodiment includes a first adjustment member 110 and a second adjustment member 120, so that the characteristics of its compression ratio and compressible volume can be discussed accordingly, and the second compression module Group V2 only has the first adjusting member 130, so only the characteristics of its compression ratio can be discussed on the basis of this.

Please refer to FIG. 3 first. The screw compressor 100 shown here is in a normal compression ratio and full load condition, and the outlets E11 and E2 of the first adjusting parts 110 and 130 are substantially adjacent to the exhaust of the screw groups 141 and 142. The ends 141 a and 142 a, and the second adjusting member 120 abuts against the first adjusting member 110. Therefore, as described above, the fluid will be confined to the first area 151a and the second area 151b and must be compressed by the screw group 141, and at this time, the second adjusting member 120 isolates the second area 151b and the third area 151c.

Taking Fig. 3 as a reference, the screw compressor 100 shown in Fig. 4 is in a low compression ratio and full load condition. At this time, the first adjusting member 110 and its outlet E11 are far away from the discharge end 141a of the screw group 141, and The first adjusting member 130 and its outlet E2 are far away from the exhaust end 142 a of the screw assembly 142. For the first compression chamber 151, this action is equivalent to the first adjustment member 110 driving the second adjustment member 120 to move in the negative Y-axis direction, so that the second adjustment member 120 covers the second adjustment member 120 formed by the screw group 141. The second area 151b is reduced, but because the second adjusting member 120 still abuts on the first adjusting member 110, the fluid entering the first compression chamber 151 must still be compressed by the screw assembly 141, so the load of the driving module 170 is not reduced , So that the screw compressor 100 still presents a full-load working condition. In contrast, for the outlet E11, it is far away from the exhaust side of the screw group 141, which is equivalent to allowing the fluid to be discharged from the first compression chamber 151 early, thereby reducing the degree of fluid compression. Simultaneously comparing FIG. 3 with FIG. 4 shows that the compression ratio of the fluid during the compression process of FIG. 4 is significantly lower than that of the compression process of FIG. 3. In addition, for the second compression chamber 152, the changes of the first adjustment member 130 in FIGS. 3 and 4 are the same as the first adjustment member 110 in the first compression chamber 151, so the details are not described again.

Taking FIG. 3 as a reference, the screw compressor 100 shown in FIG. 5 is in normal compression ratio and unloading conditions, and the first adjusting member 110 is in the same position as that shown in FIG. 3 and is adjacent to the exhaust end of the screw group 141. 141a, therefore, the compression ratio formed by the fluid after being compressed in the first compression chamber 151 is also the same as in FIG. 3. However, at this time, the second adjusting member 120 has been separated from the first adjusting member 110 to allow the second area 151b to communicate with the third area 151c. At the same time, the second adjusting member 120 is also substantially separated from the screw group 141, and thus separates each other. An outlet E13 is formed between the first adjustment member 110 and the second adjustment member 120, so that the fluid in the first compression chamber 151 flows from the second area 151b to the third area 151c, and gives way to the second area 151b. The fluid is not likely to be compressed because the second adjusting member 120 is separated from the screw group 141. Therefore, the fluid that can be compressed in the first compression chamber 151 is limited to the first formed by the first adjusting member 110 and the screw group 141. Area 151a to reduce the flow rate of the fluid being compressed.

Fig. 6 is a partial cross-sectional view of a screw compressor according to another embodiment of the present invention. Fig. 7 is a system schematic diagram of the screw compressor of Fig. 6. Please refer to FIGS. 6 and 7 at the same time. The difference from the previous embodiment is that in the screw compressor 200 of this embodiment, the second compression module is changed to have the same component composition as the first compression module, that is, the first compression module has the same composition as the first compression module. The two compression modules also include the first adjustment member 230 and the second adjustment member 240 and can be regarded as another first compression module. The first adjusting member 230 and the second adjusting member 240 are respectively driven by the driving modules 164 and 165 to change their positions relative to the screw group 142. The driving mechanism is the same as that of the driving modules 161 and 162 on the right side, so they will not be described again. In addition, referring to Fig. 7 and comparing the aforementioned Figs. 3 to 5, it can be clearly seen that the screw compressor 200 shown in Fig. 7 is in the normal compression ratio and unloading conditions regardless of the compression chamber, that is, the first The outlets E11, E2 of an adjusting member 110, 230 are adjacent to the exhaust ends 141a, 142a of the screw groups 141, 142, and the second adjusting member 120, 240 is separated from the first adjusting member 110, 230 to form outlets E13, E14 to Reduce the compressible volume of the fluid in the compression chamber.

Based on the above-mentioned illustrations in Figs. 3 to 5 and Fig. 7, it can be clearly seen that no matter where the compression chamber is, the first adjustment members 110, 130, 230 are used to adjust the positions of the outlets E11, E2 of the compressed fluid, so as to interact with the fluid The second adjusting member 120, 240 is used to adjust the compressible volume of the fluid and adjust the load of the screw group 141, 142 and the drive module 170 accordingly.

Fig. 8 is a schematic diagram of an adjustment assembly according to another embodiment of the present invention. Please refer to FIG. 8 and compare with the embodiment shown in FIG. 3. The adjustment assembly of this embodiment includes a first adjustment piece 110, a second adjustment piece 320, and a third adjustment piece 330. The first adjustment piece 110 is the same as the previous embodiment, and The second adjusting member 320 is also partly similar to the second adjusting member 120 of the foregoing embodiment, that is, it can also move relative to the first adjusting member 110 to abut or disengage from the first adjusting member 110. The difference from the previous embodiment is that the third adjusting member 330 is movably disposed in the compression chamber, and the part 321 of the second adjusting member 320 passes through the opening 332 of the third adjusting member 330 so that the second adjusting member 320 is located Between the third adjusting member 330 and the first adjusting member 110. In other words, the third adjusting member 330 of this embodiment is located on the moving path of the second adjusting member 320 away from the first adjusting member 110.

Accordingly, in the first operation mode, when the driving module is connected to the part 331 of the third adjusting member 330 and driven by the force F2, the third adjusting member 330 can be separated from the second adjusting member 320, and the second adjusting member 330 can be separated from the second adjusting member 320. The member 320 still maintains the state of abutting the first adjusting member 110. As the aforementioned second adjusting member 120 separates from the first adjusting member 110, in this embodiment, in addition to the pressure relief effect on the fluid in the compression chamber, the second adjusting member 320 still abuts the first adjusting member 110 at the same time. The compressible amount of the fluid is greater than that of the previous embodiment.

In addition, in the second operation mode, that is, when the second adjusting member 320 is driven by the force F1, the second adjusting member 320 will also drive the third adjusting member 330 away from the first adjusting member 110 when it is separated from the first adjusting member 110. The adjustment member 110, compared to the aforementioned only allowing the third adjustment member 330 to be separated from the second adjustment member 320, the second operation mode not only causes the pressure relief effect on the fluid in the compression chamber, but also the compressible volume that can compress the fluid. Less than the aforementioned first mode of operation. Accordingly, the user can correspondingly select the first operation mode or the second operation mode according to requirements.

To sum up, in the above-mentioned embodiment of the present invention, the screw compressor is provided with a screw group for compressing fluid in the compression chamber of its body, and a movable first adjusting member and a movable first adjusting member and corresponding to the screw group are also provided in the compression chamber of the screw compressor. The second adjusting member, wherein the first adjusting member and the screw group form an outlet to facilitate the fluid to be discharged from the outlet of the compression chamber after being compressed, and the outlet can change position with the movement of the first adjusting member, thereby determining the degree of compression of the fluid , Which is related to the compression ratio of the fluid.

Furthermore, the second adjusting piece can move relative to the first adjusting piece to abut or separate from the first adjusting piece, so the corresponding state of the second adjusting piece relative to the first adjusting piece can be used to adjust the fluid in the compression chamber. Compressible volume. That is to say, whether the second adjusting member is separated from the first adjusting member can cause the compressible volume of whether the fluid in the compression chamber is compressed by the screw assembly. The user can adjust accordingly to control the load of the screw group or drive module. In addition, in one embodiment, a third adjustment element is further included, which has a corresponding driving relationship with the second adjustment element, so that the user can select different adjustment means.

Accordingly, the screw compressor can perform corresponding adjustment actions on the compression module composed of the screw group, the first adjusting member and the second adjusting member by sensing the pressure or the saturation temperature of the fluid, and then Make the state of the compression module meet the demand, that is, let the compression module have an operation mode that can respond to different needs and adjust its load state, and accordingly improve the adaptability and work efficiency of the screw compressor, and thus achieve energy-saving effects .

100, 200: Screw compressor 110, 130, 230: the first adjustment piece 120, 240, 320: second adjustment piece 141, 142: Screw group 141a, 142a: exhaust end 150: body 151: first compression chamber 151a: The first area 151b: second area 151c: third area 152: second compression chamber 153: Chamber 161, 162, 163, 164, 165, 170: drive module 161a: Piston 161b: drive rod 180: control module 321, 331: Partial 330: The third adjustment piece 332: hole E1, E12: entrance E11, E2, E13, E14: exit F1, F2: exert force V1: The first compression module V2: The second compression module X-Y-Z: Right-angle coordinates

Fig. 1 is a partial cross-sectional view of a screw compressor according to an embodiment of the present invention. Fig. 2 is a schematic diagram of the connection relationship of related components of the screw compressor of Fig. 1. 3 to 5 are schematic diagrams of the system of the screw compressor of FIG. 1 respectively. Fig. 6 is a partial cross-sectional view of a screw compressor according to another embodiment of the present invention. Fig. 7 is a system schematic diagram of the screw compressor of Fig. 6. Fig. 8 is a schematic diagram of an adjustment assembly according to another embodiment of the present invention.

100: Screw compressor

110, 130: the first adjustment piece

120: The second adjustment piece

141, 142: Screw group

150: body

151: first compression chamber

151c: third area

152: second compression chamber

153: Chamber

161, 162, 163, 170: drive module

161a: Piston

161b: drive rod

E1: entrance

E2, E11: Export

V1: The first compression module

V2: The second compression module

X-Y-Z: Right-angle coordinates

Claims (24)

A screw compressor includes: A body with a compression cavity; A screw group arranged in the compression cavity, a fluid suitable for flowing into the compression cavity to be compressed by the screw group; A first adjusting member is movably arranged above the screw group, the first adjusting member and the screw group form an outlet, the fluid compressed by the screw group is suitable for flowing out of the compression chamber from the outlet, and the outlet follows Move the first adjusting member relative to the screw group to change the position; and A second adjusting element is movably disposed in the compression chamber to abut against or separate from the first adjusting element, so as to adjust the compressible volume of the fluid in the compression chamber. The screw compressor according to claim 1, wherein the first adjusting member covers the screw group to form a first area in the compression chamber, and the second adjusting member covers the screw group to form a first area in the compression chamber. A second area is formed in the cavity, When the second adjusting member abuts against the first adjusting member, the parts of the screw set in the first area and the second area form a compression area of the fluid in the compression chamber, When the second adjusting member is separated from the first adjusting member, the screw set only forms a compression area of the fluid in the compression chamber in the first section. The screw compressor described in item 2 of the scope of patent application, wherein the range of the first zone is related to the compression ratio of the fluid in the compression chamber. The screw compressor described in item 2 of the scope of patent application, wherein the range of the second area is related to the compressible volume of the fluid in the compression chamber. The screw compressor described in item 2 of the scope of the patent application, wherein the compression chamber further has a third area, and the second adjusting member is located between the second area and the third area, when the second adjusting member When abutting against the first adjusting element, the second adjusting element isolates the second area from the third area, and when the second adjusting element separates from the first adjusting element, the second area communicates with the third area. According to the screw compressor described in item 1 of the scope of patent application, the second adjusting member moves relative to the screw group to cover the screw group or separate from the screw group. The screw compressor described in item 1 of the scope of patent application also includes: A plurality of driving modules are respectively arranged on the body and connected to the first adjusting part and the second adjusting part. For the screw compressor described in item 7 of the scope of patent application, each of the drive modules includes: A piston movably arranged in a chamber of the body; and A drive rod is connected between the piston and the first adjustment piece, or connected between the piston and the second adjustment piece. For example, the screw compressor described in item 1 of the scope of patent application further includes a third adjusting member movably disposed in the compression chamber to abut against the second adjusting member or to separate from the second adjusting member. The screw compressor according to item 9 of the scope of patent application, wherein a part of the second adjusting element passes through the third adjusting element, so that the second adjusting element is located between the third adjusting element and the first adjusting element In between, when the second adjusting member is separated from the first adjusting member, the third adjusting member is also driven to move away from the first adjusting member. A screw compressor includes: One body with multiple compression chambers; At least one first compression module is disposed in at least one of the compression cavities, and the first compression module includes: A screw group arranged in the compression cavity, a fluid suitable for flowing into the compression cavity to be compressed by the screw group; A first adjusting member is movably arranged above the screw group, the first adjusting member and the screw group form an outlet, the fluid compressed by the screw group is suitable for flowing out of the compression chamber from the outlet, and the outlet follows Move the first adjusting member relative to the screw group to change the position; and At least one second adjusting element is movably disposed in the compression chamber to abut against or separate from the first adjusting element, so as to adjust the compressible volume of the fluid in the compression chamber. The screw compressor according to claim 11, wherein the body has a first compression chamber and at least one second compression chamber, the first compression module is disposed in the first compression chamber, and the screw compressor The compressor also includes at least one second compression module, which is arranged in the second compression chamber. After the uncompressed fluid flows into the body, it is sequentially compressed by the first compression module and the second compression module. Exhaust the body. The screw compressor according to item 12 of the scope of patent application, wherein the second compression module includes another screw group. According to the screw compressor described in claim 12, the second compression module includes another screw group and another first adjusting member. For example, the screw compressor described in item 12 of the scope of patent application includes a plurality of first compression modules, which are respectively arranged in the compression chambers. The screw compressor described in claim 11, wherein the first adjusting member covers the screw group to form a first area in the compression chamber, and the second adjusting member covers the screw group to compress A second area is formed in the cavity, When the second adjusting member abuts against the first adjusting member, the parts of the screw set in the first area and the second area form a compression area of the fluid in the compression chamber, When the second adjusting member is separated from the first adjusting member, the screw set only forms a compression area of the fluid in the compression chamber in the first section. The screw compressor described in item 16 of the scope of patent application, wherein the range of the first zone is related to the compression ratio of the fluid in the compression chamber. As described in the 16th patent application, the range of the second area is related to the compressible volume of the fluid in the compression chamber. For the screw compressor described in item 16 of the scope of patent application, the compression chamber further has a third area, and the second adjustment element is located between the second area and the third area. When the second adjustment element When abutting against the first adjusting element, the second adjusting element isolates the second area from the third area, and when the second adjusting element separates from the first adjusting element, the second area communicates with the third area. The screw compressor according to item 11 of the scope of patent application, wherein the second adjusting member moves relative to the screw group to cover the screw group or separate from the screw group. The screw compressor described in item 11 of the scope of patent application also includes: A plurality of driving modules are respectively arranged on the body and connected to the first adjusting part and the second adjusting part. For the screw compressor described in item 21 of the scope of patent application, each of the drive modules includes: A piston movably arranged in a chamber of the body; and A drive rod is connected between the piston and the first adjustment piece, or connected between the piston and the second adjustment piece. For example, the screw compressor described in item 11 of the scope of the patent application further includes a third adjusting member movably disposed in the compression chamber to abut against the second adjusting member or to disengage from the second adjusting member. The screw compressor according to item 23 of the scope of patent application, wherein a part of the second adjustment piece passes through the third adjustment piece, so that the second adjustment piece is located between the third adjustment piece and the first adjustment piece In between, when the second adjusting member is separated from the first adjusting member, the third adjusting member is also driven to move away from the first adjusting member.

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