Screw compressor with cooling mechanism

Abstract

The utility model discloses a screw compressor with a cooling mechanism, and relates to the technical field of compressors, the screw compressor comprises an air cylinder, a female rotor and a male rotor are installed in the air cylinder, the air cylinder is provided with an air inlet and an air outlet, the air outlet is provided with the cooling mechanism, the cooling mechanism comprises a heat exchange tube, and the heat exchange tube is provided with a heat exchanger. The heat exchange tube is provided with a water inlet and a water outlet, the heat exchange tube is of a spiral tubular structure, the heat exchange tube is installed on the exhaust port, at least part of the heat exchange tube penetrates through the exhaust port to enter the air cylinder, and the cooling mechanism is provided with the heat exchange tube of the spiral tubular structure, so that a large heat exchange area can be achieved only with a small space; the heat exchange efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of compressors, and more specifically to a screw compressor with a cooling mechanism. Background Art

[0002] The compressor is a driven fluid machine that boosts low-pressure gas to high-pressure gas. It is the heart of the refrigeration system. It sucks low-temperature, low-pressure refrigerant gas from the intake pipe, compresses it through the motor, and discharges high-temperature, high-pressure refrigerant gas to the exhaust pipe to provide power for the refrigeration cycle. According to the number of compression chambers, it is divided into single-stage compression host and two-stage compression host. The host cylinder of the existing two-stage compression host is assembled, and the sealing between the components is insufficient, which is prone to air leakage, and the manufacturing process is also relatively complicated. At the same time, the compression ratio of the two-stage compression is improved, and the air compression heat will also increase synchronously. High heat will have a negative impact on air compression. The host cylinder of the existing two-stage compression host is insufficient in heat dissipation, which is not conducive to the operation of the compressor. In view of the above problems, the invention patent with publication number: CN114738279A discloses a two-stage compression main engine with an interstage cooling device, including a main engine cylinder body, and a main engine cylinder cover fixedly arranged on the left side of the main engine cylinder body, an air inlet is arranged on the left side of the upper end of the main engine cylinder body, and an exhaust port is arranged on the right side of the lower end of the main engine cylinder body. The main engine cylinder body is provided with a front-stage compression chamber, an air transmission chamber and a rear-stage compression chamber from top to bottom in sequence, and the main engine cylinder cover is provided with a transmission distribution chamber, the front-stage compression chamber is rotatably connected with a front-stage screw, and the rear-stage compression chamber is rotatably connected with a rear-stage screw; in this technical solution, by providing a cooling circulation module, cooling oil can be input through the oil inlet chamber, The heat exchange of cooling oil is used to efficiently cool the air compressed in the front stage and the linked gear set, so as to ensure the efficient operation of the compression main engine, effectively reduce the pressure of the compressed air in the front stage, and improve the air compression ratio. However, the cooling cycle module is arranged in the oil inlet chamber in the middle of the left side of the main engine cylinder body. The cooling efficiency of the cooling cycle module for the high-temperature gas at the discharge port of the first-stage main engine is limited. Whether the existing cooling cycle modules are air-cooled or water-cooled, they need a larger heat exchange area to achieve a better cooling effect on large-sized compressors, which leads to a larger area of ​​the whole machine and higher power consumption. Therefore, the current screw compressor still needs a cooling mechanism that can achieve a larger heat exchange area in a smaller space. Summary of the invention

[0003] The technical problem to be solved by the present application is to provide a screw compressor with a cooling mechanism. The cooling mechanism is provided with a heat exchange tube with a spiral tubular structure, so that a larger heat exchange area can be achieved with only a smaller space, thereby improving the heat exchange efficiency.

[0004] The present application provides a screw compressor with a cooling mechanism, comprising a cylinder, wherein a female rotor and a male rotor are installed in the cylinder, wherein the cylinder is provided with an air inlet and an exhaust port, wherein a cooling mechanism is installed at the exhaust port, wherein the cooling mechanism comprises a heat exchange tube, wherein the heat exchange tube is provided with a water inlet and a water outlet, wherein the heat exchange tube is in a spiral tubular structure, wherein the heat exchange tube is installed on the exhaust port, and at least a portion of the heat exchange tube passes through the exhaust port into the cylinder.

[0005] In the present technical scheme, a positive rotor and a negative rotor are installed in the cylinder, and an air inlet and an exhaust port are provided in the cylinder. During the operation of the compressor, gas is sucked into the cylinder from the air inlet and compressed into high-pressure gas by the positive rotor and the negative rotor, and the high-pressure gas is discharged from the exhaust port, thereby completing the process of intake, compression and exhaust. Considering that the high temperature of the high-pressure gas at the exhaust port will affect the subsequent operation of the compressor, especially the two-stage screw compressor requires inter-stage cooling, the present scheme installs a cooling mechanism at the exhaust port, and the cooling mechanism includes a heat exchange tube. The cooling mechanism cools and dissipates the high-pressure gas at the exhaust port through the heat exchange tube. The heat exchange tube is provided in a spiral tubular structure, so that the heat exchange tube only requires a small space to achieve a large heat exchange area, and the heat exchange efficiency is high. The heat exchange tube is provided and installed on the exhaust port, and the heat exchange tube can directly cool and dissipate the high-pressure gas at the exhaust port, thereby improving the heat exchange efficiency. At least part of the heat exchange tube is provided to pass through the exhaust port into the cylinder, and the installation space required for the heat exchange tube is small. The heat exchange tube with a spiral tubular structure has little effect on the volume of the whole machine and saves energy.

[0006] As an improvement, the heat exchange tube is provided with multiple spiral coils from the inside to the outside, and gaps for gas to pass through are formed between adjacent spiral coils. In this technical solution, the heat exchange tube is in a spiral tubular structure to reduce the volume and increase the heat exchange area. By providing the heat exchange tube with multiple spiral coils, the heat exchange area is further increased. The high-pressure gas at the exhaust port is discharged after passing through the gaps in the heat exchange tube, and the heat exchange efficiency is higher. In addition, the spiral coils are interconnected, and the heat exchange tube is an integrated structure. In the actual production process, the number of spiral coils can be set according to the size of the exhaust port, and the adaptability is higher.

[0007] As an improvement, the heat exchange tube includes a first spiral layer and a second spiral layer, and the first spiral layer is located on the periphery of the second spiral layer. In the technical solution, the heat exchange tube is at least composed of a first spiral layer and a second spiral layer, the size of the first spiral layer is larger than the size of the second spiral layer, and the first spiral layer is located in the first spiral layer, so as to increase the heat exchange area as much as possible without increasing the volume of the heat exchange tube, thereby improving the heat exchange efficiency.

[0008] As an improvement, the heat exchange tube is provided with a first extended tube section and a second extended tube section, the water inlet is provided on the first extended tube section, and the water outlet is provided on the second extended tube section. In this technical solution, the heat exchange tube is connected to an external water pipe through the first extended tube section and the second extended tube section, and the first extended tube section takes in water and the second extended tube section takes out water to realize water circulation and save energy.

[0009] As an improvement, the cooling mechanism includes a connection seat adapted to the exhaust port, the heat exchange tube is installed on the connection seat, and the heat exchange tube is connected to the exhaust port through the connection seat. In this technical solution, a connection seat capable of installing a heat exchange tube is provided, and the heat exchange tube is installed on the exhaust port through the connection seat. The installation structure is simple and reliable, and the connection seat and the exhaust port can be an integrated structure, which is more compact and can also be connected by fasteners such as bolts.

[0010] As an improvement, the connection seat is provided with a first mounting hole adapted to the first extended pipe segment, the first extended pipe segment passes through the first mounting hole and extends out of the connection seat, and the connection seat is provided with a second mounting hole adapted to the second extended pipe segment, the second extended pipe segment passes through the second mounting hole and extends out of the connection seat. In this technical solution, a first mounting hole for the first extended pipe segment to pass through and a second mounting hole for the second extended pipe segment to pass through are provided on the connection seat, so that the heat exchange tube is limitedly installed on the connection seat, the installation structure is simpler and more reliable, and the first extended pipe segment passes through the first mounting hole and extends out of the connection seat, and the second extended pipe segment passes through the second mounting hole and extends out of the connection seat, so that the heat exchange space of the heat exchange tube is larger and the heat exchange efficiency is improved.

[0011] As an improvement, the first extended pipe section is sealed to the first mounting hole, and the second extended pipe section is sealed to the second mounting hole. In the technical solution, a sealed connection is set between the first extended pipe section and the first mounting hole, and a sealed connection is set between the second extended pipe section and the second mounting hole to prevent leakage of the coolant and improve the sealing performance; in the present application, the first extended pipe section is welded or threaded to the first mounting hole, and the second extended pipe section is welded or threaded to the second mounting hole. Both welding and threaded connection are a kind of sealed connection, and the connection is simple and reliable.

[0012] As an improvement, the connecting seat and the heat exchange tube are an integrated structure. In this technical solution, the connecting seat and the heat exchange tube are an integrated structure, the integrity of the cooling mechanism is better, the structure is more compact, and the installation is simpler and more labor-saving.

[0013] As an improvement, the ends of the first extended pipe section and the second extended pipe section are both provided with threads, the first extended pipe section is externally connected to the water inlet pipe through the threads, and the second extended pipe section is externally connected to the water outlet pipe through the threads. In this technical solution, by providing threads at the end of the first extended pipe section to connect the water inlet pipe, and by providing threads at the end of the second extended pipe section to connect the water outlet pipe, the threaded connection method is simple and reliable, and has good sealing performance.

[0014] As an improvement, the heat exchange tube is a copper fin tube. In this technical solution, the heat exchange tube is a copper fin tube, which has high thermal conductivity and higher heat exchange efficiency, thereby improving the heat exchange performance of the heat exchange tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the three-dimensional structure of a screw compressor with a cooling mechanism according to the present application.

[0016] Figure 2 This is a schematic cross-sectional structural diagram of a screw compressor with a cooling mechanism according to the present application.

[0017] Figure 3 It is a side view schematic diagram of the cooling mechanism in this application.

[0018] Figure 4 For this application Figure 3 Schematic cross-sectional view along the AA direction.

[0019] Figure 5 For this application Figure 3 Schematic cross-sectional view along the BB direction.

[0020] Figure 6 It is a schematic diagram of the three-dimensional structure of the heat exchange tube in this application.

[0021] As shown in the figure: 1. Cylinder; 11. Air inlet; 12. Exhaust port; 2. Cooling mechanism; 21. Heat exchange tube; 211. Water inlet; 212. Water outlet; 213. First spiral layer; 214. Second spiral layer; 215. First extending pipe section; 216. Second extending pipe section; 22. Connecting seat; 221. First mounting hole; 222. Second mounting hole. DETAILED DESCRIPTION

[0022] In order to better understand the present application, a more detailed description of various aspects of the present application will be made with reference to the accompanying drawings. It should be understood that these detailed descriptions are only descriptions of exemplary embodiments of the present application, and do not limit the scope of the present application in any way. Throughout the specification, the same figure numerals refer to the same elements.

[0023] In the drawings, the thickness, size and shape of objects have been slightly exaggerated for ease of explanation. The drawings are only examples and are not drawn strictly to scale.

[0024] It should also be understood that the terms “comprises,” “including,” “has,” “contains,” and “comprising,” when used in this specification, indicate the presence of the described features, integers, steps, operations, elements, and / or parts, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, parts, and / or combinations thereof.

[0025] like Figures 1 to 6 As shown, the present application discloses a screw compressor with a cooling mechanism, including a cylinder 1, a female rotor and a male rotor are installed in the cylinder 1, and the cylinder 1 is provided with an air inlet 11 and an exhaust port 12. During the operation of the compressor, gas is sucked into the cylinder 1 from the air inlet 11 and compressed into high-pressure gas by the male rotor and the female rotor, and the high-pressure gas is discharged from the exhaust port 12, thereby completing the process of suction, compression and exhaust; the exhaust port 12 is installed with a cooling mechanism 2, and the cooling mechanism 2 includes a heat exchange tube 21, and the heat exchange tube 21 is provided with a water inlet 211 and a water outlet 212. The heat exchange tube 21 is a spiral tube structure, and the heat exchange tube 21 is installed on the exhaust port 12, and at least part of the heat exchange The tube 21 passes through the exhaust port 12 and enters the cylinder 1. The cooling mechanism 2 cools and dissipates the high-pressure gas at the exhaust port 12 through the heat exchange tube 21. The heat exchange tube 21 is arranged to have a spiral tubular structure, so that the heat exchange tube 21 only requires a small space to achieve a large heat exchange area, and the heat exchange efficiency is high. The heat exchange tube 21 is arranged to be installed on the exhaust port 12. The heat exchange tube 21 can directly cool and dissipate the high-pressure gas at the exhaust port 12, thereby improving the heat exchange efficiency. At least a part of the heat exchange tube 21 is arranged to pass through the exhaust port 12 to enter the cylinder 1. The installation space required for the heat exchange tube 21 is small, and the heat exchange tube 21 with a spiral tubular structure has little effect on the volume of the entire machine and saves energy.

[0026] More specifically, Figure 2 , Figure 5 and Figure 6 As shown, the heat exchange tube 21 is provided with a plurality of spiral coils from the inside to the outside, and gaps for gas to pass through are formed between adjacent spiral coils. The heat exchange tube 21 is in a spiral tubular structure to reduce the volume and increase the heat exchange area. By arranging the heat exchange tube 21 with a plurality of spiral coils, the heat exchange area is further increased, and the high-pressure gas at the exhaust port 12 is discharged after passing through the gaps in the heat exchange tube 21, so the heat exchange efficiency is higher, and the spiral coils are interconnected. The heat exchange tube 21 is an integrated structure. In the actual production process, the number of spiral coils can be set according to the size of the exhaust port 12, so the adaptability is higher.

[0027] More specifically, Figure 2 , Figure 5 and Figure 6As shown, the heat exchange tube 21 includes a first spiral layer 213 and a second spiral layer 214, and the first spiral layer 213 is located at the outer periphery of the second spiral layer 214. The heat exchange tube 21 is arranged to be composed of at least the first spiral layer 213 and the second spiral layer 214. The size of the first spiral layer 213 is larger than that of the second spiral layer 214. The first spiral layer 213 is located in the first spiral layer 213, so as to increase the heat exchange area as much as possible without increasing the volume of the heat exchange tube 21, thereby improving the heat exchange efficiency.

[0028] More specifically, Figure 6 As shown, the heat exchange tube 21 is provided with a first extending tube segment 215 and a second extending tube segment 216, the water inlet 211 is provided on the first extending tube segment 215, and the water outlet 212 is provided on the second extending tube segment 216. The heat exchange tube 21 is connected to an external water pipe through the first extending tube segment 215 and the second extending tube segment 216. Water enters the first extending tube segment 215 and water exits the second extending tube segment 216 to realize water circulation and save energy.

[0029] More specifically, Figure 1 , Figure 3 and Figure 4 As shown, the cooling mechanism 2 includes a connecting seat 22 adapted to the exhaust port 12, and the heat exchange tube 21 is installed on the connecting seat 22. The heat exchange tube 21 is connected to the exhaust port 12 through the connecting seat 22. A connecting seat 22 capable of installing the heat exchange tube 21 is provided, and the heat exchange tube 21 is installed on the exhaust port 12 through the connecting seat 22. The installation structure is simple and reliable. The connecting seat 22 and the exhaust port 12 can be an integrated structure, which is more compact and can also be connected by fasteners such as bolts.

[0030] More specifically, Figure 1 , Figure 3 and Figure 4 As shown, the connecting seat 22 is provided with a first mounting hole 221 adapted to the first extending pipe segment 215, and the first extending pipe segment 215 extends out of the connecting seat 22 through the first mounting hole 221. The connecting seat 22 is provided with a second mounting hole 222 adapted to the second extending pipe segment 216, and the second extending pipe segment 216 extends out of the connecting seat 22 through the second mounting hole 222. The first mounting hole 221 for the first extending pipe segment 215 to pass through and the second mounting hole 222 for the second extending pipe segment 216 to pass through are provided on the connecting seat 22, so that the heat exchange tube 21 is limitedly installed on the connecting seat 22, and the installation structure is simpler and more reliable. In addition, the first extending pipe segment 215 extends out of the connecting seat 22 through the first mounting hole 221, and the second extending pipe segment 216 extends out of the connecting seat 22 through the second mounting hole 222, so that the heat exchange space of the heat exchange tube 21 is larger and the heat exchange efficiency is improved.

[0031] More specifically, Figure 1 , Figure 3 and Figure 4 As shown, the first protruding pipe section 215 is sealedly connected to the first mounting hole 221, and the second protruding pipe section 216 is sealedly connected to the second mounting hole 222. The first protruding pipe section 215 is sealedly connected to the first mounting hole 221, and the second protruding pipe section 216 is sealedly connected to the second mounting hole 222 to prevent leakage of the coolant and improve the sealing performance. In the present application, the first protruding pipe section 215 is welded or threadedly connected to the first mounting hole 221, and the second protruding pipe section 216 is welded or threadedly connected to the second mounting hole 222. Both welding and threaded connection are a type of sealed connection, and the connection is simple and reliable. Alternatively, the connecting seat 22 and the heat exchange tube 21 are an integrated structure. The connecting seat 22 and the heat exchange tube 21 are arranged as an integrated structure, the cooling mechanism 2 has better integrity and a more compact structure, and the installation is also simpler and more labor-saving.

[0032] More specifically, threads are provided at the ends of the first extending pipe section 215 and the second extending pipe section 216. The first extending pipe section 215 is externally connected to an inlet pipe via threads, and the second extending pipe section 216 is externally connected to an outlet pipe via threads. By providing threads at the end of the first extending pipe section 215 to connect the inlet pipe, and by providing threads at the end of the second extending pipe section 216 to connect the outlet pipe, the threaded connection method is simple, reliable and has good sealing performance.

[0033] More specifically, the heat exchange tube 21 is a copper fin tube. The heat exchange tube 21 is made of a copper fin tube. The copper tube has high thermal conductivity and higher heat exchange efficiency, thereby improving the heat exchange performance of the heat exchange tube 21.

[0034] The present application is not limited to the above-mentioned optimal implementation mode. Anyone can derive other forms of products under the inspiration of the present application. However, no matter what changes are made in the shape or structure, all technical solutions that are the same or similar to those of the present application fall within the protection scope of the present application.

Claims

1. A screw compressor with a cooling mechanism, comprising a cylinder (1), wherein a female rotor and a male rotor are installed in the cylinder (1), and the cylinder (1) is provided with an air inlet (11) and an air outlet (12), characterized in that: The exhaust port (12) is equipped with a cooling mechanism (2), the cooling mechanism (2) comprises a heat exchange tube (21), the heat exchange tube (21) is provided with a water inlet (211) and a water outlet (212), the heat exchange tube (21) is in a spiral tube structure, the heat exchange tube (21) is installed on the exhaust port (12), and at least a portion of the heat exchange tube (21) passes through the exhaust port (12) and enters the cylinder (1).

2. A screw compressor with a cooling mechanism according to claim 1, characterized in that: The heat exchange tube (21) is provided with a plurality of spiral layers from the inside to the outside, and gaps for gas to pass through are formed between adjacent spiral layers.

3. A screw compressor with a cooling mechanism according to claim 1 or 2, characterized in that: The heat exchange tube (21) comprises a first spiral layer (213) and a second spiral layer (214), and the first spiral layer (213) is located on the outer periphery of the second spiral layer (214).

4. A screw compressor with a cooling mechanism according to claim 1 or 2, characterized in that: The heat exchange tube (21) is provided with a first extending tube section (215) and a second extending tube section (216); the water inlet (211) is provided on the first extending tube section (215); and the water outlet (212) is provided on the second extending tube section (216).

5. A screw compressor with a cooling mechanism according to claim 4, characterized in that: The cooling mechanism (2) comprises a connecting seat (22) adapted to the exhaust port (12), the heat exchange tube (21) is mounted on the connecting seat (22), and the heat exchange tube (21) is connected to the exhaust port (12) via the connecting seat (22).

6. A screw compressor with a cooling mechanism according to claim 5, characterized in that: The connecting seat (22) is provided with a first mounting hole (221) adapted to the first extending pipe section (215), and the first extending pipe section (215) passes through the first mounting hole (221) to extend out of the connecting seat (22); the connecting seat (22) is provided with a second mounting hole (222) adapted to the second extending pipe section (216), and the second extending pipe section (216) passes through the second mounting hole (222) to extend out of the connecting seat (22).

7. A screw compressor with a cooling mechanism according to claim 6, characterized in that: The first extending pipe section (215) is sealedly connected to the first mounting hole (221), and the second extending pipe section (216) is sealedly connected to the second mounting hole (222).

8. A screw compressor with a cooling mechanism according to claim 6, characterized in that: The connecting seat (22) and the heat exchange tube (21) are an integrated structure.

9. A screw compressor with a cooling mechanism according to claim 4, characterized in that: The ends of the first extending pipe section (215) and the second extending pipe section (216) are both provided with threads, the first extending pipe section (215) is externally connected to a water inlet pipe via threads, and the second extending pipe section (216) is externally connected to a water outlet pipe via threads.

10. The screw compressor with a cooling mechanism according to claim 1, characterized in that: The heat exchange tube (21) is a copper fin tube.

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