Cooling device for screw compressor

Abstract

The utility model discloses a kind of cooling device for screw compressor, including air compressor box body, the air compressor box body is equipped with the air extraction hood of cover host computer and motor, air extraction hood lower part is equipped with the air inlet hole of intercommunication air compressor box body inside, air extraction hood upper part is equipped with the air extraction opening of intercommunication air compressor box body outside, air extraction opening is equipped with cooling assembly and the air extraction assembly of being placed in the outside of cooling assembly. This scheme accelerates the heat generated by host computer and motor to be discharged outside air compressor box body, accelerates the air flow rate in air compressor box body, reduces the heat in air compressor, prevents the heat generated by host computer and motor and the like components Accumulate in air compressor to affect operating efficiency and affect the heat exchange efficiency of cooler;While improving the cooling effect of compressed air and lubricating oil, improve the heat exchange efficiency of cooling assembly.

Description

Technical Field

[0001] This utility model relates to the field of compressor technology, and in particular to a cooling device for a screw compressor. Background Technology

[0002] The cooling system of a screw compressor mainly consists of two parts: a cooler and a fan. The cooler includes an oil cooler and an air cooler. The oil cooler cools the lubricating oil before it enters the compressor body, while the air cooler cools the compressed air. The cooler uses an aluminum plate-fin heat exchanger, and a fan forces cool air towards it. As the air flows through the cooling fins, it exchanges heat with the compressed air or lubricating oil, thus carrying away heat and achieving the cooling effect for the compressed air and lubricating oil. Currently, screw compressor cooling systems are located inside the compressor housing. The oil and air coolers generally adopt a planar assembly structure, with fans located inside the cooler blowing air to cool the compressor and simultaneously carrying the heat generated by the main unit and motor inside the compressor housing out of the housing. This type of cooling system has inefficient heat exchange, easily causing the internal temperature of the compressor to rise, affecting operating efficiency and energy consumption, and reducing equipment lifespan.

[0003] For example, Chinese Patent Publication No. CN203430792U, published on February 12, 2014, entitled "Cooling System for Screw Compressor", includes an oil cooler, an aftercooler, and an air compressor housing. A fan assembly is provided on the air compressor housing. The feature is that the oil cooler is horizontally installed on the air compressor housing, the aftercooler is vertically installed on the air compressor housing and located on one side of the oil cooler, the fan assembly is installed on the upper end of the air compressor housing, and the other sides of the air compressor housing are provided with enclosures.

[0004] The drawbacks of existing patents are: Current screw compressor cooling systems are located inside the compressor housing, and the oil coolers and gas coolers generally employ a planar assembly structure. Cooling is achieved by a fan located inside the cooler, simultaneously carrying heat generated by the compressor unit and motor out of the housing. This type of cooling system has poor heat exchange efficiency, easily causing the internal temperature of the compressor to rise, affecting operating efficiency and energy consumption, and reducing equipment lifespan. Utility Model Content

[0005] The purpose of this invention is to improve the problem of poor heat exchange efficiency in existing screw compressor cooling systems, which easily leads to increased internal temperature of the air compressor, and to provide a cooling device for screw compressors that improves the heat exchange efficiency of the screw compressor cooling system.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A cooling device for a screw compressor includes a compressor housing. Inside the compressor housing is a hood that covers the main unit and motor. The lower part of the hood has an air inlet connecting to the interior of the compressor housing, and the upper part has an exhaust port connecting to the exterior of the compressor housing. A cooling component and an exhaust assembly located outside the cooling component are housed within the exhaust port. This cooling device for a screw compressor adds a hood to the compressor housing, covering the main unit and motor. The lower part of the hood has an air inlet connecting to the interior of the compressor housing, and the upper part has an exhaust port connecting to the exterior of the compressor housing. Air entering the compressor housing is drawn in from the lower part of the hood and discharged from the upper part through the exhaust assembly. The hood reduces the cross-sectional area of ​​the airflow and increases the air velocity within the compressor housing, thereby enhancing ventilation, accelerating heat dissipation, preventing excessively high temperatures within the compressor housing from affecting operating efficiency and energy consumption, and extending the equipment's service life. In existing technology, the cooling assembly includes a cooling unit for cooling the lubricating oil injected into the compressor body and an air cooler for cooling the compressed air. The cooling assembly is located inside the exhaust assembly. During the exhaust process, the exhaust assembly exchanges heat with the cooling assembly, thereby carrying away heat and achieving a cooling effect on the compressed air and lubricating oil. The cooling assembly, exhaust assembly, and exhaust hood work together to reduce the heat inside the air compressor while improving the cooling effect on the compressed air and lubricating oil. This prevents heat generated by components such as the main unit and motor from accumulating inside the air compressor, affecting operating efficiency and the heat exchange efficiency of the cooler.

[0008] Preferably, the exhaust vent is located at the top of the exhaust hood, and both the cooling assembly and the exhaust assembly are located on the upper part of the exhaust hood, with the cooling assembly positioned below the exhaust assembly. This creates an upward airflow within the exhaust hood, accelerating the removal of heat generated by the main unit and motor from the air compressor housing, increasing the airflow velocity within the air compressor housing, and simultaneously improving the heat exchange efficiency of the cooling assembly.

[0009] Preferably, the cooling assembly is located above the main unit and motor of the air compressor. An upward airflow is generated within the exhaust hood, passing through the main motor, cooling assembly, and exhaust assembly before being discharged outside the air compressor housing.

[0010] Preferably, the cooling assembly includes at least two coolers spaced apart in the vertical direction, the edges of which are sealed to the inner wall of the exhaust hood, forming an exhaust chamber between the cooling assembly and the exhaust assembly. The coolers include oil coolers and air coolers, with at least two coolers spaced apart in the vertical direction to allow airflow to pass through them. The arrangement of the coolers can be varied and is not limited to those mentioned in the specification. When the cooling assembly includes one oil cooler and one air cooler, the two coolers are spaced apart in the vertical direction; when the cooling assembly includes multiple oil coolers or multiple air coolers, the multiple oil coolers are spaced apart in the vertical direction and adjacent oil coolers are connected by oil pipes, and the multiple air coolers are spaced apart in the vertical direction and adjacent air coolers are connected by air pipes.

[0011] Preferably, the cooling assembly includes two coolers arranged in a V-shape or inverted V-shape, the edges of which are sealed to the inner wall of the exhaust hood to form an exhaust chamber between the cooling assembly and the exhaust assembly. The two V-shaped or inverted V-shaped coolers, within the same flow channel, increase the heat dissipation area compared to horizontally arranged coolers. Each cooler includes a cooler body and a cooler base. The heat dissipation area of ​​the cooler body is set according to actual needs, and the cooler base is arranged in a V-shape or inverted V-shape to make the cooler body also arranged in a V-shape or inverted V-shape. The outer edge of the cooler base can be directly sealed to the inner wall of the exhaust hood, or it can be installed inside the exhaust hood by forming a V-shaped hopper with the cooler base via a bracket. The connection methods between the cooling assembly and the exhaust hood include, but are not limited to: (1) the cooling assembly is directly welded inside the exhaust hood; (2) the exhaust hood is a separate unit, with the edges of the cooling assembly and the separate exhaust hood combined and locked together.

[0012] Preferably, the exhaust hood has a narrowed exhaust port, and the cross-sectional area of ​​the exhaust port is smaller than the cross-sectional area of ​​the lower part of the exhaust hood.

[0013] Preferably, the exhaust hood includes, from bottom to top, a covering section for the main unit and motor, a cylindrical section extending vertically and equipped with cooling components, and an exhaust section with a constricted opening. The constricted opening of the exhaust section increases the gas flow rate inside the exhaust hood and accelerates heat dissipation.

[0014] Preferably, the air inlet is located on the three adjacent side plates of the exhaust hood.

[0015] Preferably, the air compressor housing is provided with an air inlet mesh, which is located on the side plate of the air compressor housing away from the air inlet hole. The air inlet mesh on the air compressor housing and the air inlet hole on the exhaust hood are staggered, forming an airflow around the lower part of the exhaust hood inside the air compressor housing, which has the effect of heat dissipation and cooling.

[0016] Preferably, the ventilation assembly includes a fan placed inside the ventilation port.

[0017] Preferably, a silencer is provided on the outside of the exhaust vent, and the silencer is connected to the exhaust vent. The silencer is used to reduce noise at the exhaust vent.

[0018] Therefore, this utility model has the following beneficial effects: it accelerates the discharge of heat generated by the main unit and motor from the air compressor housing, accelerates the air flow rate inside the air compressor housing, reduces the heat inside the air compressor, and prevents the heat generated by the main unit and motor and other components from accumulating inside the air compressor, affecting operating efficiency and heat exchange efficiency of the cooler; at the same time, it improves the cooling effect of compressed air and lubricating oil, and improves the heat exchange efficiency of the cooling components. Attached Figure Description

[0019] Figure 1 This is a structural schematic diagram of one embodiment of the present utility model.

[0020] Figure 2 This is a schematic diagram of a structure of the present invention with the air compressor housing removed in Embodiment 2.

[0021] Figure 3 This is a cross-sectional view of Embodiment 2 of this utility model.

[0022] Figure 4 This is a schematic diagram of a structure of the present invention, embodiment three, in which the air compressor housing is removed.

[0023] Figure 5 This is a cross-sectional view of Embodiment 3 of this utility model with the air compressor housing removed.

[0024] Figure 6 This is a schematic diagram of a structure of Embodiment 3 of this utility model, in which the air compressor housing and part of the exhaust hood are removed.

[0025] As shown in the picture:

[0026] Air compressor housing 1, air inlet mesh 1.1,

[0027] Main unit 2, motor 3,

[0028] 4. Exhaust hood, 4.1. Air inlet, 4.2. Exhaust vent

[0029] Cooling assembly 5, cooler 5.1, bracket 5.2,

[0030] 6. Exhaust fan; 7. Silencer. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the utility model will be further described below in conjunction with the accompanying drawings and specific implementation methods.

[0032] Example 1, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 The cooling device for a screw compressor shown includes an air compressor housing 1. Inside the air compressor housing 1, there is an exhaust hood 4 that covers the main unit 2 and the motor 3. The lower part of the exhaust hood 4 has an air inlet 4.1 that communicates with the inside of the air compressor housing 1. The upper part of the exhaust hood 4 has an exhaust port 4.2 that communicates with the outside of the air compressor housing 1. The exhaust port 4.2 has a cooling component 5 and an exhaust component placed outside the cooling component 5.

[0033] The cooling system of a screw compressor mainly consists of two parts: a cooler 5.1 and a fan. Cooler 5.1 includes an oil cooler 5.1 and an air cooler 5.1. The oil cooler 5.1 cools the lubricating oil before it enters the compressor body, while the air cooler 5.1 cools the compressed air. Cooler 5.1 uses an aluminum plate-fin heat exchanger, and a fan forces cool air towards it. As the air flows through the heat dissipation fins of cooler 5.1, it exchanges heat with the compressed air or lubricating oil, thus carrying away heat and achieving the cooling effect for both. Currently, the cooling system of a screw compressor is located inside the compressor housing 1. The oil cooler 5.1 and air cooler 5.1 generally adopt a planar assembly structure. A fan located inside the cooler 5.1 blows air to cool it, while simultaneously carrying away the heat generated by the main unit 2 and motor 3 inside the compressor housing 1. The cooling system of this type has poor heat exchange, which easily leads to an increase in the internal temperature of the air compressor, affecting operating efficiency and energy consumption, and reducing equipment lifespan. In order to improve the problem of poor heat exchange efficiency of existing screw compressor cooling systems, which easily leads to an increase in the internal temperature of the air compressor, a cooling device for screw compressors that improves the heat exchange efficiency of the screw compressor cooling system is provided.

[0034] In the above embodiment, a cooling device for a screw compressor includes an exhaust hood 4 installed inside the compressor housing 1. The exhaust hood 4 covers the main unit 2 and the motor 3. The lower part of the exhaust hood 4 has an air inlet 4.1 connecting to the inside of the compressor housing 1, and the upper part of the exhaust hood 4 has an exhaust port 4.2 connecting to the outside of the compressor housing 1. Air entering the compressor housing 1 is drawn in from the lower part of the exhaust hood 4 through the exhaust assembly and discharged from the upper part of the exhaust hood 4. The exhaust hood 4 inside the compressor housing 1 reduces the cross-sectional area of ​​the airflow and increases the air velocity inside the compressor housing 1, thereby enhancing ventilation, accelerating heat dissipation, preventing excessively high temperatures inside the compressor housing 1 from affecting operating efficiency and energy consumption, and improving equipment lifespan. In the prior art, the cooling assembly 5 includes a cooling unit 5.1 for cooling the lubricating oil injected into the compressor body and a cooling unit 5.1 for cooling the compressed air. The cooling assembly 5 is located inside the exhaust assembly. During the exhaust process, the exhaust assembly exchanges heat with the cooling assembly 5, thereby carrying away heat and achieving a cooling effect on the compressed air and lubricating oil. The cooling assembly 5, the exhaust assembly, and the exhaust hood 4 work together to reduce the heat inside the air compressor and improve the cooling effect on the compressed air and lubricating oil. This prevents heat generated by components such as the main unit 2 and the motor 3 from accumulating inside the air compressor, affecting operating efficiency and the heat exchange efficiency of the cooling unit 5.1.

[0035] Example 2, as Figure 2 , Figure 3 The cooling device for a screw compressor shown includes an air compressor housing 1. Inside the air compressor housing 1, there is an exhaust hood 4 that covers the main unit 2 and the motor 3. The lower part of the exhaust hood 4 has an air inlet 4.1 that communicates with the inside of the air compressor housing 1. The upper part of the exhaust hood 4 has an exhaust port 4.2 that communicates with the outside of the air compressor housing 1. The exhaust port 4.2 has a cooling component 5 and an exhaust component placed outside the cooling component 5.

[0036] In this embodiment, as Figure 2 , Figure 3 As shown, the exhaust port 4.2 is located at the top of the exhaust hood 4, and both the cooling assembly 5 and the exhaust assembly are located above the exhaust hood 4, with the cooling assembly 5 positioned below the exhaust assembly. This creates an upward airflow within the exhaust hood 4. This accelerates the removal of heat generated by the main unit 2 and motor 3 from the air compressor housing 1, increases the airflow velocity within the air compressor housing 1, and simultaneously improves the heat exchange efficiency of the cooling assembly 5. The cooling assembly 5 is located above the main unit 2 and motor 3 of the air compressor. The upward airflow within the exhaust hood 4 passes through the main unit 2, motor 3, cooling assembly 5, and exhaust assembly before exiting the air compressor housing 1.

[0037] Specifically, such as Figure 2 , Figure 3As shown, the cooling assembly 5 includes at least two coolers 5.1 arranged vertically at intervals. The edges of the coolers 5.1 are sealed to the inner wall of the exhaust hood 4, forming an exhaust chamber between the cooling assembly 5 and the exhaust assembly. Each cooler 5.1 includes an oil cooler 5.1 and an air cooler 5.1, with at least two coolers 5.1 arranged vertically at intervals to allow airflow to pass through them. The arrangement of the coolers 5.1 can be varied and is not limited to those mentioned in the specification. When the cooling assembly 5 includes one oil cooler 5.1 and one air cooler 5.1, the two coolers 5.1 are arranged vertically at intervals. When the cooling assembly 5 includes multiple oil coolers 5.1 or multiple air coolers 5.1, the multiple oil coolers 5.1 are arranged vertically at intervals and adjacent oil coolers 5.1 are connected by oil pipes; similarly, the multiple air coolers 5.1 are arranged vertically at intervals and adjacent air coolers 5.1 are connected by air pipes.

[0038] The exhaust vent 4.2 of the exhaust hood 4 is further optimized, such as... Figure 2 , Figure 3 As shown, the exhaust port 4.2 of the exhaust hood 4 is narrowed, and the cross-sectional area of ​​the exhaust port 4.2 is smaller than the cross-sectional area of ​​the lower part of the exhaust hood 4.

[0039] Preferably, the exhaust hood 4 includes, from bottom to top, a covering section for the main unit 2 and the motor 3, a cylindrical section extending vertically and equipped with a cooling component 5, and an exhaust section with a constricted opening. The constricted opening of the exhaust section increases the gas flow rate inside the exhaust hood 4 and accelerates heat dissipation.

[0040] Further optimizations were made to the air inlet 4.1, such as... Figure 2 , Figure 3 As shown, the air inlet 4.1 is placed on the three adjacent side plates of the exhaust hood 4.

[0041] Further optimization of air compressor housing 1, such as... Figure 2 , Figure 3 As shown, the air compressor housing 1 is provided with an air inlet mesh 1.1, which is located on the side plate of the air compressor housing 1 away from the air inlet hole 4.1. The air inlet mesh 1.1 on the air compressor housing 1 and the air inlet hole 4.1 on the exhaust hood 4 are staggered, forming an airflow around the lower part of the exhaust hood 4 inside the air compressor housing 1, which has the effect of heat dissipation and cooling.

[0042] In this embodiment, as Figure 2 , Figure 3 As shown, the exhaust assembly includes an exhaust fan 6 placed inside the exhaust port 4.2.

[0043] Further optimizations were made to the exhaust vent 4.2, such as... Figure 2 , Figure 3As shown, a silencer 7 is provided on the outside of the exhaust vent 4.2, and the silencer 7 is connected to the exhaust vent 4.2. The silencer 7 is used to reduce the noise at the exhaust vent 4.2.

[0044] To address the problem of poor heat exchange efficiency in existing screw compressor cooling systems, which easily leads to increased internal compressor temperatures, a cooling device for screw compressors is provided to improve the heat exchange efficiency of the screw compressor cooling system. For example... Figure 2 , Figure 3 As shown, the above embodiment accelerates the discharge of heat generated by the main unit 2 and motor 3 outside the air compressor housing 1, accelerates the air flow rate inside the air compressor housing 1, reduces the heat inside the air compressor, and prevents the heat generated by the main unit 2 and motor 3 and other components from accumulating inside the air compressor, affecting operating efficiency and heat exchange efficiency of the cooler 5.1; at the same time, it improves the cooling effect of compressed air and lubricating oil, and improves the heat exchange efficiency of the cooling component 5.

[0045] Example 3, as Figure 4 , Figure 5 , Figure 6 The cooling device for a screw compressor shown includes an air compressor housing 1. Inside the air compressor housing 1, there is an exhaust hood 4 that covers the main unit 2 and the motor 3. The lower part of the exhaust hood 4 has an air inlet 4.1 that communicates with the inside of the air compressor housing 1. The upper part of the exhaust hood 4 has an exhaust port 4.2 that communicates with the outside of the air compressor housing 1. The exhaust port 4.2 has a cooling component 5 and an exhaust component placed outside the cooling component 5.

[0046] In this embodiment, as Figure 4 , Figure 5 , Figure 6 As shown, the exhaust port 4.2 is located at the top of the exhaust hood 4, and both the cooling assembly 5 and the exhaust assembly are located above the exhaust hood 4, with the cooling assembly 5 positioned below the exhaust assembly. This creates an upward airflow within the exhaust hood 4. This accelerates the removal of heat generated by the main unit 2 and motor 3 from the air compressor housing 1, increases the airflow velocity within the air compressor housing 1, and simultaneously improves the heat exchange efficiency of the cooling assembly 5. The cooling assembly 5 is located above the main unit 2 and motor 3 of the air compressor. The upward airflow within the exhaust hood 4 passes through the main unit 2, motor 3, cooling assembly 5, and exhaust assembly before exiting the air compressor housing 1.

[0047] Specifically, such as Figure 4 , Figure 5 , Figure 6As shown, the cooling assembly 5 includes two coolers 5.1 arranged in a V-shape or inverted V-shape. The edges of the coolers 5.1 are sealed to the inner wall of the exhaust hood 4, forming an exhaust chamber between the cooling assembly 5 and the exhaust assembly. The two coolers 5.1 arranged in a V-shape or inverted V-shape have an increased heat dissipation area compared to horizontally arranged coolers 5.1 within the same flow channel. Each cooler 5.1 includes a cooler 5.1 body and a cooler 5.1 base. The heat dissipation area of ​​the cooler 5.1 body is set according to actual needs, and the cooler 5.1 base is arranged in a V-shape or inverted V-shape to align with the cooler 5.1 body. The outer edge of the cooler 5.1 base can be directly sealed to the inner wall of the exhaust hood 4, or it can be mounted inside the exhaust hood 4 through a bracket 5.2 forming a V-shaped hopper with the cooler 5.1 base. The connection methods between the cooling component 5 and the exhaust hood 4 include, but are not limited to: (1) the cooling component 5 is directly welded inside the exhaust hood 4; (2) the exhaust hood 4 is set in a split manner, and the edge of the cooling component 5 is combined and locked with the split exhaust hood 4.

[0048] The exhaust vent 4.2 of the exhaust hood 4 is further optimized, such as... Figure 4 , Figure 5 , Figure 6 As shown, the exhaust port 4.2 of the exhaust hood 4 is narrowed, and the cross-sectional area of ​​the exhaust port 4.2 is smaller than the cross-sectional area of ​​the lower part of the exhaust hood 4.

[0049] Preferably, the exhaust hood 4 includes, from bottom to top, a covering section for the main unit 2 and the motor 3, a cylindrical section extending vertically and equipped with a cooling component 5, and an exhaust section with a constricted opening. The constricted opening of the exhaust section increases the gas flow rate inside the exhaust hood 4 and accelerates heat dissipation.

[0050] Further optimizations were made to the air inlet 4.1, such as... Figure 4 , Figure 5 , Figure 6 As shown, the air inlet 4.1 is placed on the three adjacent side plates of the exhaust hood 4.

[0051] Further optimization of air compressor housing 1, such as... Figure 4 , Figure 5 , Figure 6 As shown, the air compressor housing 1 is provided with an air inlet mesh 1.1, which is located on the side plate of the air compressor housing 1 away from the air inlet hole 4.1. The air inlet mesh 1.1 on the air compressor housing 1 and the air inlet hole 4.1 on the exhaust hood 4 are staggered, forming an airflow around the lower part of the exhaust hood 4 inside the air compressor housing 1, which has the effect of heat dissipation and cooling.

[0052] In this embodiment, as Figure 4 , Figure 5 , Figure 6 As shown, the exhaust assembly includes an exhaust fan 6 placed inside the exhaust port 4.2.

[0053] Further optimizations were made to the exhaust vent 4.2, such as... Figure 4 , Figure 5 , Figure 6 As shown, a silencer 7 is provided on the outside of the exhaust vent 4.2, and the silencer 7 is connected to the exhaust vent 4.2. The silencer 7 is used to reduce the noise at the exhaust vent 4.2.

[0054] To address the problem of poor heat exchange efficiency in existing screw compressor cooling systems, which easily leads to increased internal compressor temperatures, a cooling device for screw compressors is provided to improve the heat exchange efficiency of the screw compressor cooling system. For example... Figure 4 , Figure 5 , Figure 6 As shown, the above embodiment accelerates the discharge of heat generated by the main unit 2 and motor 3 outside the air compressor housing 1, accelerates the air flow rate inside the air compressor housing 1, reduces the heat inside the air compressor, and prevents the heat generated by the main unit 2 and motor 3 and other components from accumulating inside the air compressor, affecting operating efficiency and heat exchange efficiency of the cooler 5.1; at the same time, it improves the cooling effect of compressed air and lubricating oil, and improves the heat exchange efficiency of the cooling component 5.

[0055] The specific embodiments described above are merely preferred embodiments of this utility model and are not intended to limit the specific scope of implementation of this utility model. All equivalent changes made to the shape and structure of this utility model should be included within the protection scope of this utility model.

Claims

1. A cooling device for a screw compressor, comprising a compressor housing, characterized in that, The air compressor housing is equipped with an exhaust hood that covers the main unit and motor. The lower part of the exhaust hood has an air inlet that connects to the inside of the air compressor housing, and the upper part of the exhaust hood has an exhaust port that connects to the outside of the air compressor housing. The exhaust port is equipped with a cooling component and an exhaust component placed outside the cooling component.

2. The cooling device for a screw compressor according to claim 1, characterized in that, The exhaust vent is located at the top of the exhaust hood, and both the cooling component and the exhaust component are located on the upper part of the exhaust hood, with the cooling component located below the exhaust component.

3. A cooling device for a screw compressor according to claim 2, characterized in that, The cooling assembly is located above the main unit and motor of the air compressor.

4. A cooling device for a screw compressor according to claim 3, characterized in that, The cooling assembly includes at least two coolers spaced apart in the vertical direction, the edges of which are sealed to the inner wall of the exhaust hood, so that an exhaust chamber is formed between the cooling assembly and the exhaust assembly.

5. A cooling device for a screw compressor according to claim 3, characterized in that, The cooling assembly includes two coolers arranged in a V-shape or an inverted V-shape, the edges of which are sealed to the inner wall of the exhaust hood, so that an exhaust chamber is formed between the cooling assembly and the exhaust assembly.

6. A cooling device for a screw compressor according to claim 1, 2, 3, 4, or 5, characterized in that, The exhaust hood has a tapered exhaust port, and the cross-sectional area of ​​the exhaust port is smaller than the cross-sectional area of ​​the lower part of the exhaust hood.

7. A cooling device for a screw compressor according to claim 1, 2, 3, 4, or 5, characterized in that, The air inlet is located on the lower part of the three adjacent side plates of the exhaust hood.

8. A cooling device for a screw compressor according to claim 1, 2, 3, 4, or 5, characterized in that, The air compressor housing is provided with an air inlet mesh, which is located on the side plate of the air compressor housing away from the air inlet.

9. A cooling device for a screw compressor according to claim 1, 2, 3, 4, or 5, characterized in that, The ventilation assembly includes a fan placed inside the ventilation port.

10. A cooling device for a screw compressor according to claim 1, 2, 3, 4, or 5, characterized in that, A silencer is provided on the outside of the exhaust vent, and the silencer is connected to the exhaust vent.

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