Cooling device for air compressor

Abstract

The utility model provides a cooling device for an air compressor, which is arranged in the air compressor and comprises an oil-gas cooler, a fan cover and a radiating fan, the cooling fan and the oil-gas cooler are arranged on the two sides of the fan cover in the height direction respectively. The oil-gas cooler comprises a lubricating oil cooling part and a compressed air cooling part; a first air duct and a second air duct which are mutually independent are arranged in the fan cover; the cooling fan comprises a first fan and a second fan; the first fan is communicated with the first air duct, and the first fan dissipates heat of the lubricating oil cooling part through the first air duct; the second fan is communicated with the second air duct, and the second fan dissipates heat of the compressed air cooling part through the second air duct; the lubricating oil and the compressed air are cooled through the two draught fans correspondingly, the cooling temperature of the lubricating oil and the cooling temperature of the compressed air are accurately controlled, and the problem that temperature control is not accurate due to mixed heat dissipation is solved.

Description

Technical Field

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

[0002] An air compressor is a device used to compress gases. Most air compressors are reciprocating piston, rotary vane, or rotary screw types. When a screw air compressor is working, the parts move at high speeds, requiring lubricating oil to lubricate and reduce friction and wear.

[0003] In the daily operation of screw air compressors, the temperature of the lubricating oil needs to be controlled within a certain range. Both excessively high and low operating temperatures will affect oil film formation and lubrication effectiveness. Generally, air compressor lubricating oil has a specific operating temperature range. Excessively high operating temperatures will cause the oil viscosity to decrease, forming an unstable oil film that cannot effectively lubricate metal parts. Furthermore, high temperatures can cause the lubricating oil to decompose, producing deposits and acidic substances, which can lead to equipment malfunctions and damage in severe cases. Conversely, if the operating temperature of the air compressor lubricating oil is too low, the oil viscosity will increase, resulting in poor fluidity and difficulty in reaching all parts of the equipment, thus failing to achieve effective lubrication. In addition, low temperatures will accelerate lubricating oil aging, solidification, and leakage.

[0004] During the compression of air, the temperature rises sharply, which can affect subsequent processing and use, and may even cause equipment malfunctions. Therefore, like lubricating oil, compressed air also needs to be cooled.

[0005] Currently, screw air compressors employ a single-duct mixed cooling system for both lubricating oil and compressed air cooling. Both the lubricating oil and compressed air cooling components are cooled by a single device. However, because lubricating oil and compressed air require different amounts of heat, this single-duct mixed cooling system can cause the lubricating oil temperature to fail to maintain its optimal operating temperature. It may also result in the compressed air not achieving the necessary cooling effect. Excessively high temperatures can negatively impact subsequent operation, while excessively low temperatures can lead to continuous condensation. Furthermore, the mismatch between oil and water cooling systems results in energy waste. Utility Model Content

[0006] This invention aims to solve the problem of inaccurate temperature control caused by mixed heat dissipation, and provides a cooling device for air compressors that uses multiple fans to cool lubricating oil and compressed air respectively, thereby accurately controlling the cooling temperature of lubricating oil and compressed air.

[0007] To solve the above-mentioned technical problems, this utility model provides a cooling device for an air compressor. The cooling device is installed inside the air compressor and includes an oil-gas cooler, a fan shroud, and a cooling fan. The cooling fan and the oil-gas cooler are respectively installed on both sides of the fan shroud along the height direction.

[0008] The oil-gas cooler includes a lubricating oil cooling section and a compressed air cooling section; the fan shroud has an independent first air duct and a second air duct; the cooling fan includes a first fan and a second fan.

[0009] The first fan is connected to the first air duct, and the first fan dissipates heat from the lubricating oil cooling section through the first air duct; the second fan is connected to the second air duct, and the second fan dissipates heat from the compressed air cooling section through the second air duct.

[0010] In a preferred embodiment, the first fan and the second fan are connected to a frequency converter controller.

[0011] In a preferred embodiment, the hood includes a duct partition, which is fixed inside the hood to isolate the first duct and the second duct.

[0012] In a preferred embodiment, the shroud has inspection ports on both sides along its length.

[0013] In a preferred embodiment, the oil-gas cooler includes an air inlet, an air outlet, an oil inlet, and an oil outlet.

[0014] To solve the above-mentioned technical problems, this utility model provides a cooling device for an air compressor. The cooling device is installed inside the air compressor and includes an oil-gas cooler, a fan shroud, and several cooling fans. The cooling fans and the oil-gas cooler are respectively installed on both sides of the fan shroud along the height direction.

[0015] The oil-gas cooler includes a lubricating oil cooling section and a compressed air cooling section; the interior of the fan shroud is divided into several independent air ducts, and each independent air duct is equipped with a set of cooling fans.

[0016] The cooling fan is connected to the independent air duct and dissipates heat from the lubricating oil cooling section or the compressed air cooling section through the independent air duct.

[0017] In a preferred embodiment, the plurality of independent air ducts are divided into a first air duct and a second air duct;

[0018] The first air duct is used for heat dissipation of the lubricating oil cooling section; the second air duct is used for heat dissipation of the compressed air cooling section.

[0019] In a preferred embodiment, the cooling fan is connected to a frequency converter.

[0020] In a preferred embodiment, the hood includes a plurality of air duct partitions, which are fixed inside the hood to isolate a plurality of independent air ducts.

[0021] Compared with the prior art, the technical solution of this utility model has the following beneficial effects:

[0022] 1. Dual-fan independent cooling: Two fans are used to cool the lubricating oil and compressed air separately, solving the problem of inaccurate temperature control caused by mixed heat dissipation.

[0023] 2. The design of the air duct baffle isolates the lubricating oil from the compressed air cooling duct, avoiding thermal interference and improving heat dissipation efficiency. The split air duct design reduces energy waste, achieving energy conservation and emission reduction.

[0024] 3. Variable frequency energy-saving control: The power of the two fans is independently adjusted by the variable frequency controller to match different cooling needs and reduce energy consumption. At the same time, it can precisely control the cooling temperature of lubricating oil and compressed air to avoid excessive oil temperature or condensation in the air.

[0025] 4. The design of the windshield inspection port is convenient for maintenance, with a simple structure, low cost, and easy maintenance.

[0026] 5. The fan and air duct are independently designed, with separate lubricating oil cooling and compressed air cooling, facilitating individual inspection and maintenance. If one cooling function or fan malfunctions, it will not affect the operation of the entire system, making maintenance more efficient and reducing downtime and maintenance costs. Attached Figure Description

[0027] Figure 1 This is a front view of the cooling device of the air compressor in the first embodiment of the present invention;

[0028] Figure 2 This is a side view of the cooling device of the air compressor in the first embodiment of the present invention;

[0029] Figure 3 This is a top view of the cooling device of the air compressor in the first embodiment of the present invention;

[0030] Figure 4 This is a three-dimensional structural schematic diagram of the cooling device of the air compressor in the first embodiment of this utility model;

[0031] Figure 5 This is an exploded view of the cooling device of the air compressor in the first embodiment of this utility model.

[0032] Explanation of reference numerals in the attached drawings: 11, First fan; 12, Fan shroud; 13, Air inlet; 14, Oil inlet; 15, Oil outlet; 16, Second fan; 21, Inspection port; 22, Air outlet; 51, Duct baffle. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0034] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed", "equipped with", "sleeved / connected", "connected", etc., should be interpreted broadly. For example, "connection" can be a wall-mounted connection, a detachable connection, or an integral connection; 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 a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0036] This embodiment provides a cooling device for air compressors, which solves the problems of low cooling efficiency, energy waste, and difficulty in accurately controlling oil and air temperatures caused by single-duct mixed heat dissipation where lubricating oil and compressed air share the same duct. Example

[0037] like Figures 1-5The cooling device is installed inside the air compressor and includes an oil-gas cooler, a fan shroud 12, and a cooling fan. The cooling fan and the oil-gas cooler are respectively located on both sides of the fan shroud 12 along the height direction. The oil-gas cooler is used for heat exchange between lubricating oil and compressed air, and includes a lubricating oil cooling section and a compressed air cooling section. The fan shroud 12 has a first air duct and a second air duct that are independent of each other. The cooling fan includes a first fan 11 and a second fan 16. The first fan 11 is connected to the first air duct and dissipates heat from the lubricating oil cooling section through the first air duct. The second fan 16 is connected to the second air duct and dissipates heat from the compressed air cooling section through the second air duct.

[0038] By employing a dual-fan cooling system with a first fan 11 and a second fan 16, the lubricating oil and compressed air are cooled separately. The first fan 11 and the second fan 16 cool the lubricating oil and compressed air independently through separate first and second air ducts. This separate cooling system avoids thermal interference, improves heat dissipation efficiency, and solves the problem of low cooling efficiency caused by mixed heat dissipation in a single air duct.

[0039] In this embodiment, the first fan 11 and the second fan 16 are connected to a frequency converter. Since the cooling requirements of lubricating oil and compressed air are different, this dual-fan cooling device cools the lubricating oil and compressed air separately. Combined with the frequency converter to control the fans, a cooling effect can be achieved, and energy waste can be effectively avoided.

[0040] By controlling the first fan 11 and the second fan 16 with a frequency converter, different power can be used, which can meet the heat dissipation requirements while maximizing energy saving. This device is low in cost, saves energy and reduces emissions, and the frequency converter reduces energy consumption and extends the life of the fans.

[0041] The fan cover 12 is a sheet metal fan cover 12. The sheet metal fan cover 12 is set on the top of the air compressor, and an oil-gas cooler is set above the sheet metal fan cover 12. This can effectively dissipate heat to the outside of the air compressor and prevent the air compressor from malfunctioning due to high temperature inside.

[0042] In this embodiment, the fan cover 12 includes a duct partition 51, which is fixed inside the fan cover 12 to isolate the first air duct and the second air duct. The duct partition 51 is used to isolate the first air duct and the second air duct, prevent thermal interference, and further facilitate the cooling of different air ducts.

[0043] The fan cover 12 has inspection ports 21 on both sides along its length. The inspection ports 21 are connected to the first air duct and the second air duct respectively, so as to facilitate cleaning and maintenance of the two ducts and the cooler. The inspection ports 21 are designed for easy maintenance.

[0044] The oil-gas cooler is connected to the air compressor main unit as follows: the oil-gas cooler includes an air inlet 13, an air outlet 22, an oil inlet 14, and an oil outlet 15. The air compressor main unit includes an oil-gas separator and a screw compressor. The air inlet 13 is connected to the minimum pressure valve on the oil-gas separator, and the compressed air filtered by the oil-gas separator enters the cooler. The oil inlet 14 is connected to the oil outlet 15 of the oil-gas separator. The separated lubricating oil has a high temperature and enters the cooler for cooling under the action of pressure difference. The oil outlet 15 is connected to the oil spray port of the screw compressor, and the cooled lubricating oil enters the main unit for cooling and lubrication after being filtered by an oil filter.

[0045] The compressed air is cooled by flowing through an oil-gas cooler, passing through the cooler's heat dissipation fins or ducts. A second fan 16 blows cold air through a second air duct onto the heat dissipation fins of the compressed air cooler. The cold air exchanges heat with the heat dissipation fins of the compressed air, absorbing heat from the compressed air and thus lowering its temperature.

[0046] The lubricating oil is cooled by flowing through an oil-air cooler, passing through the cooler's heat dissipation fins or pipes. A first fan 11 blows cold air through a first air duct towards the heat dissipation fins of the lubricating oil cooler. The cold air exchanges heat with the heat dissipation fins, absorbing heat from the lubricating oil and thus lowering its temperature.

[0047] Forced convection via the first fan 11 and the second fan 16 increases airflow speed and improves heat dissipation efficiency. The cooled compressed air has a lower temperature, reducing the heat load on downstream equipment. The lubricating oil re-enters the lubrication system after cooling, maintaining its good lubrication performance. Example

[0048] The cooling device is installed inside the air compressor and includes an oil-gas cooler, a fan shroud, and several cooling fans. The cooling fans and the oil-gas cooler are respectively located on both sides of the fan shroud along the height direction. The oil-gas cooler includes a lubricating oil cooling section and a compressed air cooling section. The inside of the fan shroud is divided into several independent air ducts, and a set of cooling fans is installed for each independent air duct. The cooling fans are connected to the independent air ducts and dissipate heat from the lubricating oil cooling section or the compressed air cooling section through the independent air ducts.

[0049] The independent air ducts are divided into a first air duct and a second air duct; the first air duct is used for heat dissipation of the lubricating oil cooling section; the second air duct is used for heat dissipation of the compressed air cooling section. The cooling fan is connected to a frequency converter. The fan shroud includes several air duct partitions, which are fixed inside the fan shroud to isolate the several independent air ducts.

[0050] The cooling device in this embodiment increases scalability through multiple independent air ducts and multiple cooling fans. It can be added as needed. If it is necessary to further reduce the temperature of lubricating oil or compressed air, additional coolers, independent air ducts and fans can be added. It can be flexibly configured according to the scale and complexity of the equipment.

[0051] The above description is only a preferred embodiment of the present utility model, but the design concept of the present utility model is not limited thereto. Any non-substantial modifications made to the present utility model by those skilled in the art within the scope of the technology disclosed in the present utility model using this concept shall be deemed as an infringement of the protection scope of the present utility model.

Claims

1. A cooling device for an air compressor, characterized by: The cooling device is arranged in the air compressor, and comprises an oil-gas cooler, a fan cover and a cooling fan; the cooling fan and the oil-gas cooler are arranged on two sides of the fan cover along the height direction respectively; The oil-gas cooler comprises a lubricating oil cooling part and a compressed air cooling part; the fan cover is internally provided with a first air duct and a second air duct which are independent of each other; and the cooling fan comprises a first fan and a second fan; The first fan is communicated with the first air duct, and the first fan cools the lubricating oil cooling part through the first air duct; the second fan is communicated with the second air duct, and the second fan cools the compressed air cooling part through the second air duct.

2. A cooling device for an air compressor as claimed in claim 1, wherein: The first fan and the second fan are connected with a frequency conversion controller.

3. The cooling arrangement for air compressor as claimed in claim 1 wherein: The fan cover comprises an air duct partition plate which is fixed in the fan cover to isolate the first air duct and the second air duct.

4. A cooling arrangement for an air compressor as claimed in claim 3, wherein: The fan cover is provided with an access opening on two sides along the length direction.

5. The cooling arrangement for air compressor as claimed in claim 1 wherein: The oil-gas cooler comprises an air inlet, an air outlet, an oil inlet and an oil outlet.

6. A cooling device for an air compressor, characterized by: The cooling device is arranged in the air compressor, and comprises an oil-gas cooler, a fan cover and a plurality of cooling fans; the cooling fan and the oil-gas cooler are arranged on two sides of the fan cover along the height direction respectively; The oil-gas cooler comprises a lubricating oil cooling part and a compressed air cooling part; the fan cover is internally provided with a plurality of independent air ducts, and one independent air duct is provided with one group of cooling fans; The cooling fan is communicated with the independent air duct, and cools the lubricating oil cooling part or the compressed air cooling part through the independent air duct.

7. A cooling arrangement for an air compressor as claimed in claim 6, wherein: The plurality of independent air ducts are divided into a first air duct and a second air duct; The first air duct is used for cooling the lubricating oil cooling part; and the second air duct is used for cooling the compressed air cooling part.

8. A cooling arrangement for an air compressor as claimed in claim 7, wherein: The cooling fan is connected with a frequency conversion controller.

9. The cooling arrangement for an air compressor as claimed in claim 6 wherein: The fan cover comprises a plurality of air duct partition plates which are fixed in the fan cover to isolate the plurality of independent air ducts.

Images