Low-noise screw air compressor

Abstract

The utility model provides a low-noise screw air compressor, which belongs to the technical field of air compressors and comprises a shell, an air compression assembly and a cooling assembly, the shell is provided with a containing cavity, the air compression assembly comprises a compression air inlet, a compression main machine and a compression air outlet, and a cooling system comprises a cooling partition plate and a first cooler. Due to the fact that the main noise source of the air compressor is generated in the air compression process of the compression main machine, the compression air inlet and the compression air outlet are relatively far away from the compression main machine, noise can be preliminarily reduced, and the cooled air is discharged through the compression air outlet to be used by follow-up equipment. In the whole process, efficient compression and stable output of air are achieved, meanwhile, the temperature of exhausted air is reduced through the first cooler, and the safety and stability of the system are effectively guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of air compressor technology and relates to a low-noise screw air compressor. Background Technology

[0002] The textile industry is an important application area for low-pressure air compressors, especially with a large demand for large equipment. Since domestic textile enterprises are mostly distributed in clusters, they are characterized by small scale and high density. In many factories, the air compressor equipment area is close to the production operation area. During the operation of air-cooled air compressors, the axial cooling fan will generate high noise. The main reason is that during the process of the motor driving the compressor host to operate and realize air compression, a lot of noise will be generated inside the equipment. Long-term exposure to this environment may affect the physical and mental health of the workers.

[0003] In summary, although some existing technical solutions have initially solved the noise problem, there is still considerable room for improvement in further reducing noise and reducing the high temperatures generated during air compressor operation. Summary of the Invention

[0004] The purpose of this utility model is to address the aforementioned problems existing in the prior art by proposing a low-noise screw air compressor, comprising:

[0005] The housing has a receiving cavity;

[0006] An air compression assembly includes a compression inlet, a compressor main unit, and a compression exhaust outlet. The air compression assembly is housed in the receiving cavity. The compression inlet is sequentially connected to the compressor main unit and the compression exhaust outlet. Both the compression inlet and the compression exhaust outlet are connected to the outside of the housing.

[0007] A cooling assembly is housed in the receiving cavity, and the cooling assembly includes a cooling baffle and a first cooler. The cooling baffle forms a cooling space within the receiving cavity, and the first cooler is housed in the cooling space and disposed between the compressor host and the compressor exhaust port.

[0008] The aforementioned low-noise screw air compressor also includes an oil-gas separator, and the compressed exhaust port and the compressor host are connected through the oil-gas separator.

[0009] In the aforementioned low-noise screw air compressor, the cooling assembly further includes a second cooler, the two ends of which are respectively connected to the compressor host and the oil-gas separator.

[0010] The aforementioned low-noise screw air compressor also includes a T-type temperature control valve, which is a three-way valve. The inlet of the T-type temperature control valve is connected to the oil-gas separator, one of the outlets of the T-type temperature control valve is connected to the second cooler, and the other outlet of the T-type temperature control valve is directly connected to the compressor host.

[0011] The aforementioned low-noise screw air compressor also includes a lubricating oil filter. One end of the lubricating oil filter is connected to the second cooler and the T-type temperature control valve, and the other end of the lubricating oil filter is connected to the compressor host.

[0012] In the aforementioned low-noise screw air compressor, the cooling assembly further includes a cooling drive element, a cooling fan, a cooling air inlet, and a cooling air outlet. The cooling drive element is connected to the cooling fan, and the drive element and the cooling fan are connected to the cooling baffle and housed in the cooling space. The cooling air inlet and the cooling air outlet are located on the housing and communicate with the cooling space and the outside.

[0013] The aforementioned low-noise screw air compressor also includes a frequency converter and an exhaust temperature detector. The frequency converter and the exhaust temperature detector are connected to the housing and housed in the receiving cavity. The frequency converter is electrically connected to the exhaust temperature detector and the cooling drive element.

[0014] The aforementioned low-noise screw air compressor also includes a metal filter screen, which is detachably disposed at the cooling air inlet and the cooling air outlet.

[0015] In the aforementioned low-noise screw air compressor, sound-absorbing sponge is provided on the inner surface of the housing, and a sealing strip is provided between the housing and the cooling baffle.

[0016] In the aforementioned low-noise screw air compressor, a sewage drain outlet is provided at the bottom of the housing, and the sewage drain outlet connects the cooling space to the outside.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] 1. Since the main source of noise in an air compressor comes from the air compression process by the compressor host, the air inlet and outlet are relatively far from the compressor host, which can initially reduce noise. The cooled air is discharged from the air outlet for use by subsequent equipment. The whole process achieves efficient air compression and stable output. At the same time, the first cooler reduces the temperature of the discharged air, effectively ensuring the safety and stability of the system.

[0019] 2. The frequency converter can adjust the power of the variable frequency centrifugal fan in real time. When the exhaust air temperature is too high, the power of the variable frequency centrifugal fan is increased to reduce the air temperature. When the exhaust air temperature is too low, the power of the variable frequency centrifugal fan can also be reduced, so that the exhaust air can be kept at a certain temperature. At the same time, the variable frequency operation can reduce the noise generated by the fan and reduce the noise changes during the start-up and shutdown of the fan.

[0020] 3. The sound-absorbing sponge set on the inner surface of the housing can directly absorb and block the noise generated during the operation of the equipment, effectively reducing the noise penetration to the outside. At the same time, a sealing strip is set at the gap between the cooling baffle and the housing, which not only further reduces the possibility of noise leakage through the gap, but also enhances the sealing performance of the cooling space. This structural design helps to improve the working efficiency of the cooling components and make the cooling components operate more efficiently and stably. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model.

[0022] Figure 2 This is a rear view of the present invention.

[0023] Figure 3 This is a top view of the interior of this utility model.

[0024] Figure 4 This is a schematic diagram of the cooling component of this utility model.

[0025] Figure 5 This is a top view of the cooling assembly of this utility model.

[0026] Figure 6 This is a system schematic diagram of the present invention.

[0027] In the picture:

[0028] 1. Housing; 11. Receiving cavity; 12. Sewage drain outlet; 2. Air compression assembly; 21. Compression air inlet; 22. Compression main unit; 23. Compression exhaust outlet; 3. Cooling assembly; 31. Cooling baffle; 32. First cooler; 33. Cooling space; 34. Second cooler; 35. Cooling drive element; 36. Cooling fan; 37. Cooling air inlet; 38. Cooling air outlet; 4. Oil-gas separator; 5. T-type temperature control valve; 6. Lubricating oil filter. Detailed Implementation

[0029] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0030] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0031] Furthermore, in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, features defined as "first" or "second" may explicitly or implicitly include at least one of those features. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly and specifically defined.

[0032] In this utility model, unless otherwise explicitly specified and limited, the terms "connection" and "fixation" should be interpreted broadly. For example, "fixation" can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0034] The specific embodiments described herein are merely illustrative examples of this utility model patent. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or adopt similar methods to replace them, but without departing from the patent of this utility model or exceeding the scope defined by the appended claims.

[0035] like Figures 1-6 As shown, a low-noise screw air compressor includes: a housing 1, an air compression assembly 2, and a cooling assembly 3.

[0036] The housing 1 is provided with a receiving cavity 11.

[0037] The air compression assembly 2 includes a compression inlet 21, a compression host 22, and a compression exhaust port 23. The air compression assembly 2 is housed in the receiving cavity 11. The compression inlet 21 is sequentially connected to the compression host 22 and the compression exhaust port 23. Both the compression inlet 21 and the compression exhaust port 23 are connected to the outside of the housing 1.

[0038] The cooling assembly 3 is housed in the receiving cavity 11, and the cooling assembly 3 includes a cooling partition 31 and a first cooler 32. The cooling partition 31 forms a cooling space 33 in the receiving cavity 11, and the first cooler 32 is housed in the cooling space 33 and is disposed between the compressor host 22 and the compressor exhaust port 23.

[0039] Specifically, after the air compressor is started, air enters the compressor host 22 through the compression inlet 21 and is discharged through the compression outlet 23. After the air flows out of the compressor host 22, it enters the cooling space 33, passes through the first cooler 32 located in the cooling space 33, and is discharged from the compression outlet 23. The compression inlet 21 and the compression outlet 23 are relatively far away from the compressor host 22.

[0040] In this embodiment, since the main source of noise from the air compressor comes from the air compression process of the compressor host 22, the compression inlet 21 and the compression outlet 23 are relatively far away from the compressor host 22, which can initially reduce the noise. The cooled air is discharged from the compression outlet 23 for use by subsequent equipment. The whole process achieves efficient air compression and stable output. At the same time, the first cooler 32 reduces the temperature of the discharged air, which effectively ensures the safety and stability of the system.

[0041] like Figures 1-6 As shown, based on the above embodiment, an oil-gas separator 4 is also included, and the compressed exhaust port 23 and the compressed host 22 are connected through the oil-gas separator 4.

[0042] Specifically, when air enters the compressor host 22 and is compressed, as the air is discharged from the compressor host 22, it will carry some lubricating oil for cooling. This lubricating oil moves with the air towards the compressor exhaust port 23 during the air flow. In this process, it absorbs the heat generated during compression and performs preliminary cooling on the high-temperature air. In order to prevent the lubricating oil from being discharged from the system with the compressed air, an oil-air separator 4 is installed in the pipeline between the compressor host 22 and the compressor exhaust port 23. This device can effectively separate the compressed air from the lubricating oil and allow the lubricating oil to return to the compressor host 22 for recycling through the return oil pipeline.

[0043] Preferably, there are two oil-gas separators 4, and a connecting pipe (not shown in the figure) is provided between the two oil-gas separators 4 to balance the internal pressure. The design of the dual oil-gas separators 4 can adapt to the large volume flow of the air compressor.

[0044] Furthermore, each oil-gas separator 4 has a separation filter element (not shown in the figure) for separating lubricating oil and compressed air. The separation filter element is located at the top of the internal space of the oil-gas separator 4 and is connected to the compressed exhaust port 23. The oil-gas mixture of lubricating oil and compressed air can only be discharged from the compressed exhaust port 23 after passing through the separation filter element. At this time, the lubricating oil will be filtered by the separation filter element and left behind, and only the compressed air can pass through.

[0045] In this embodiment, the oil-gas separator 4 separates the compressed air containing lubricating oil. The separated lubricating oil is returned to the compressor host 22 for recycling through the return oil pipeline, while the purified compressed air continues to flow to the exhaust port and is finally output to the external system. This process not only effectively improves the utilization rate of lubricating oil, but also ensures the cleanliness of the output air.

[0046] like Figures 1-6 As shown, based on the above embodiment, the cooling assembly 3 further includes a second cooler 34, the two ends of which are respectively connected to the compressor host 22 and the oil-gas separator 4.

[0047] Specifically, the lubricating oil separated by the oil-gas separator 4 flows back to the compressor host 22 through the second cooler 34. The heat carried by the lubricating oil is exchanged with the second cooler 34 when passing through it, thereby removing the temperature of the lubricating oil.

[0048] In this embodiment, the temperature of the lubricating oil is significantly reduced by exchanging heat with the second cooler 34, so that the cooled lubricating oil can still flow back to the compressor host 22 to achieve circulating cooling, ensuring that the heat of the compressor host 22 is not too high and ensuring its stability.

[0049] like Figures 1-6 As shown, based on the above embodiment, it also includes a T-type temperature control valve 5. The T-type temperature control valve 5 is a three-way valve. The inlet of the T-type temperature control valve 5 is connected to the oil-gas separator 4. One of the outlets of the T-type temperature control valve 5 is connected to the second cooler 34. The other outlet of the T-type temperature control valve 5 is directly connected to the compressor host 22.

[0050] Specifically, the T-type temperature control valve 5 is a three-way valve with ports A, B, and C. The lubricating oil that has passed through the oil-gas separator 4 enters the T-type temperature control valve 5 through port A. When the temperature of the lubricating oil is higher than the set value of the T-type temperature control valve 5, port B of the T-type temperature control valve 5 is closed, and the lubricating oil flows through port C through the second cooler 34 and then back to the compressor host 22. When the temperature of the lubricating oil is lower than the set value of the T-type temperature control valve 5, port C of the T-type temperature control valve 5 is closed, and the lubricating oil returns to the compressor host 22 through port B.

[0051] In this embodiment, by diverting the lubricating oil during the reflux process and cooling only the high-temperature lubricating oil, this control method not only effectively reduces the workload of the second cooler 34 and lowers energy consumption and equipment wear, but also helps to improve the overall reflux efficiency of the lubricating oil and ensures the stable operation of the lubrication system.

[0052] like Figures 1-6 As shown, based on the above embodiment, a lubricating oil filter 6 is also included. One end of the lubricating oil filter 6 is connected to the second cooler 34 and the T-type temperature control valve 5, and the other end of the lubricating oil filter 6 is connected to the compressor host 22.

[0053] Specifically, although the lubricating oil separated by the oil-gas separator 4 has removed most of the gas and air, it may still carry some small impurities during the compression process, such as cotton fibers, dust or other particles carried in the air. If these impurities flow back directly into the compressor host 22 with the lubricating oil, they may cause wear on the internal parts, thereby reducing the stability and service life of the equipment.

[0054] In this embodiment, the lubricating oil, after undergoing both cooling and filtration, is transported back to the compressor host 22 to continue participating in the cooling cycle, forming a highly efficient, clean, and stable closed-loop system. This complete process not only improves the overall operating efficiency of the air compressor but also significantly enhances the reliability and ease of maintenance of the system.

[0055] like Figures 1-6 As shown, based on the above embodiment, the cooling assembly 3 further includes a cooling drive element 35, a cooling fan 36, a cooling air inlet 37, and a cooling air outlet 38. The cooling drive element 35 is connected to the cooling fan 36. The drive element and the cooling fan 36 are connected to the cooling baffle 31 and are housed in the cooling space 33. The cooling air inlet 37 and the cooling air outlet 38 are disposed on the housing 1 and communicate with the cooling space 33 and the outside.

[0056] In this embodiment, the cooling drive element 35 drives the cooling fan 36 to rotate, thereby drawing air in through the cooling air inlet 37 and blowing it out through the cooling air outlet 38. This allows the air to quickly pass through the first cooler 32 and the second cooler 34, carrying away the temperature in the first cooler 32 and the second cooler 34. This ensures that the air compressor can continuously and effectively dissipate heat during long-term continuous operation, preventing efficiency loss or equipment damage due to overheating, thereby improving the stability and reliability of the entire machine.

[0057] like Figures 1-6 As shown, based on the above embodiment, it also includes a frequency converter (not shown in the figure) and an exhaust temperature detector (not shown in the figure). The frequency converter and the exhaust temperature detector are connected to the housing 1 and housed in the receiving cavity 11. The frequency converter is electrically connected to the exhaust temperature detector and the cooling drive element 35.

[0058] Specifically, the cooling fan 36 is a variable frequency centrifugal fan. Compared with conventional axial flow fans, the variable frequency centrifugal fan has lower noise. At the same time, the temperature of the air discharged from the compressed exhaust port 23 is monitored by an exhaust temperature detector, which works with the frequency converter to control the variable frequency centrifugal fan to achieve constant temperature operation.

[0059] Furthermore, the air compressor's control panel is equipped with a touchscreen. The air compressor also has an electricity meter and a flow meter. The touchscreen can connect to the electricity meter and flow meter data, and aggregate the collected data. By embedding a 4G IoT module in the touchscreen, the data collected by the touchscreen can be transmitted to the cloud platform in real time. After editing and processing the received data, the cloud platform displays it intuitively in the form of data groups, tables, reports, graphs, and dashboards with configuration diagrams. It also supports retrospective analysis of historical data and fault information.

[0060] In this embodiment, the frequency converter can adjust the power of the variable frequency centrifugal fan in real time. When the exhaust air temperature is too high, the power of the variable frequency centrifugal fan is increased to reduce the air temperature. When the exhaust air temperature is too low, the power of the variable frequency centrifugal fan can also be reduced, thereby ensuring that the exhaust air can be kept at a certain temperature. At the same time, variable frequency operation can reduce the noise generated by the fan and reduce the noise changes during fan start-up and shutdown.

[0061] like Figures 1-6 As shown, based on the above embodiment, a metal filter screen (not shown in the figure) is also included, which is detachably disposed on the cooling air inlet 37 and the cooling air outlet 38.

[0062] Specifically, the metal filter screen is detachably installed at the cooling air inlet 37 and the cooling air outlet 38. This air compressor is mainly used in the textile industry. There are a lot of cotton wool and oil mist in the environment of textile factories. When the air compressor is sucking air, it is easy to suck the cotton wool and oil mist in the air into the equipment and attach them to the air compressor cooler, resulting in poor heat dissipation of the cooler.

[0063] In this embodiment, compared to conventional air compressors, the metal filter screen can effectively block lint and oil mist in the air, preventing them from entering the equipment and improving the stability of equipment operation. At the same time, the detachable design of the metal filter screen makes it convenient for users to remove it for cleaning or maintenance according to usage, which not only extends the service life of the filter screen but also reduces the maintenance cost of the equipment and improves the convenience of operation.

[0064] like Figures 1-6 As shown, based on the above embodiment, the inner surface of the housing 1 is provided with sound-absorbing sponge (not shown in the figure), and a sealing strip (not shown in the figure) is provided between the housing 1 and the cooling baffle 31.

[0065] In this embodiment, the sound-absorbing sponge set on the inner surface of the housing 1 can directly absorb and block the noise generated during the operation of the equipment, effectively reducing the noise penetration to the outside. At the same time, a sealing strip is provided at the gap between the cooling baffle 31 and the housing 1, which not only further reduces the possibility of noise leakage through the gap, but also enhances the sealing performance of the cooling space 33. This structural design helps to improve the working efficiency of the cooling component 3, making the cooling component 3 operate more efficiently and stably.

[0066] like Figures 1-6 As shown, based on the above embodiment, the bottom of the housing 1 is provided with a sewage drain outlet 12, which connects the cooling space 33 to the outside.

[0067] In this embodiment, the drain outlet is located in the cooling space 33. Since the cooling baffle 31 isolates the cooling component 3 into a separate partition, when the cooling component 3 needs to be cleaned, water can be sprayed directly onto the first cooler 32 and the second cooler 34 with a water gun for rinsing. The generated sewage can be discharged along the sewage drain outlet 12 without affecting other parts of the equipment. This design not only improves cleaning efficiency but also effectively avoids the risk of secondary pollution or equipment damage caused by sewage leakage, and enhances the convenience and safety of maintenance.

Claims

1. A low-noise screw air compressor, characterized in that, include: The housing has a receiving cavity; An air compression assembly includes a compression inlet, a compressor main unit, and a compression exhaust outlet. The air compression assembly is housed in the receiving cavity. The compression inlet is sequentially connected to the compressor main unit and the compression exhaust outlet. Both the compression inlet and the compression exhaust outlet are connected to the outside of the housing. A cooling assembly is housed in the receiving cavity, and the cooling assembly includes a cooling baffle and a first cooler. The cooling baffle forms a cooling space within the receiving cavity, and the first cooler is housed in the cooling space and disposed between the compressor host and the compressor exhaust port.

2. The low-noise screw air compressor as described in claim 1, characterized in that: It also includes an oil-gas separator, through which the compressed exhaust port and the compressed main unit are connected.

3. A low-noise screw air compressor as described in claim 2, characterized in that: The cooling assembly also includes a second cooler, the two ends of which are respectively connected to the compressor host and the oil-gas separator.

4. A low-noise screw air compressor as described in claim 3, characterized in that: It also includes a T-type temperature control valve, which is a three-way valve. The inlet of the T-type temperature control valve is connected to the oil-gas separator, one of the outlets of the T-type temperature control valve is connected to the second cooler, and the other outlet of the T-type temperature control valve is directly connected to the compressor host.

5. A low-noise screw air compressor as described in claim 4, characterized in that: It also includes a lubricating oil filter, one end of which is connected to the second cooler and the T-type temperature control valve, and the other end of which is connected to the compressor host.

6. A low-noise screw air compressor as described in claim 1, characterized in that: The cooling assembly further includes a cooling drive element, a cooling fan, a cooling air inlet, and a cooling air outlet. The cooling drive element is connected to the cooling fan, and the drive element and the cooling fan are connected to the cooling baffle and housed in the cooling space. The cooling air inlet and the cooling air outlet are disposed in the housing and communicate with the cooling space and the outside.

7. A low-noise screw air compressor as described in claim 6, characterized in that: It also includes a frequency converter and an exhaust temperature detector, the frequency converter and the exhaust temperature detector being connected to the housing and housed in the receiving cavity, the frequency converter being electrically connected to the exhaust temperature detector and the cooling drive element.

8. A low-noise screw air compressor as described in claim 6, characterized in that: It also includes a metal filter screen, which is detachably disposed at the cooling air inlet and the cooling air outlet.

9. A low-noise screw air compressor as described in claim 1, characterized in that: The inner surface of the housing is provided with sound-absorbing sponge, and a sealing strip is provided between the housing and the cooling baffle.

10. A low-noise screw air compressor as described in claim 1, characterized in that: The bottom of the housing is provided with a sewage drain outlet, which connects the cooling space to the outside.

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