A variable frequency control system for a compressor cooling fan

Abstract

The application relates to the technical field of air compressors, and discloses a variable-frequency control system of a compressor cooling fan, which comprises a compressor body, a fan rotatably connected in the compressor body, a power element arranged on the fan, a heat exchanger arranged in the compressor body, a frequency converter arranged on the power element, a controller electrically connected to the frequency converter, and an energy-saving button and a stabilizing button arranged on the controller. The controller can drive the frequency converter to switch between an energy-saving mode and a stabilizing mode, so that the compressor cooling fan is regulated and controlled, the energy consumption of the compressor is reduced, the operating power of the compressor can be adjusted according to the implementation situation by the staff, the fan can run at a low speed when the compressor is in a low-temperature and low-load state, the energy consumption and the operating noise are reduced, and the fan can run at full speed when the compressor is in a high-temperature and high-load state, so that maximum cooling air volume is provided.

Description

Technical Field

[0001] This application relates to the technical field of air compressors, and in particular to a variable frequency control system for a compressor cooling fan. Background Technology

[0002] The compressor cooling fan is a core component of the compressor thermal management system. It uses forced airflow to quickly remove the heat generated during the compression process, thereby ensuring that the compressor operates within a safe temperature range.

[0003] In related technologies, a compressor cooling fan includes a compressor body, a fan rotatably connected inside the compressor body, a power component for driving the fan to rotate, and a heat exchanger inside the compressor body, which can achieve cooling through the air source generated by the fan.

[0004] Existing air compressors typically use fixed-speed cooling fans driven by industrial frequency. This crude control method results in the cooling capacity failing to dynamically match the actual operating conditions of the compressor, causing the compressor to be under load most of the time, resulting in high energy consumption. Utility Model Content

[0005] To address the issue of high energy consumption caused by the constant power of the compressor cooling fan, this application provides a variable frequency control system for the compressor cooling fan.

[0006] The variable frequency control system for a compressor cooling fan provided in this application adopts the following technical solution: A variable frequency control system for a compressor cooling fan includes a compressor body, a fan rotatably connected within the compressor body, a power component for driving the fan's rotation on the fan, a heat exchanger within the compressor body capable of cooling via the airflow generated by the fan, a frequency converter for controlling the power component's power on the power component, and a controller electrically connected to the frequency converter for adjusting different modes. The controller has an energy-saving button and a stability button. When the controller is in energy-saving mode, it drives the frequency converter to operate at the upper temperature limit; when the controller is in stability mode, it drives the frequency converter to operate at the lower temperature limit.

[0007] By adopting the above technical solution, a frequency converter is installed on the power component to control the power of the power component, and the frequency converter is electrically connected to a controller for adjusting different modes. This allows the controller to drive the frequency converter to switch between energy-saving mode and stable mode, thereby controlling the compressor cooling fan and reducing the compressor's energy consumption. Operators can adjust the compressor's operating power according to the implementation situation, allowing the fan to run at low speed when the compressor is at low temperature and low load, thereby reducing energy consumption and operating noise. When the compressor is at high temperature and high load, the fan can run at full speed to provide the maximum cooling air volume.

[0008] Optionally, the heat exchanger includes an intercooler, an aftercooler, and an oil cooler. Each of the intercooler, aftercooler, and oil cooler is equipped with a temperature sensor, which can monitor the temperature of different nodes and transmit the temperature signal to the controller.

[0009] By adopting the above technical solution, temperature sensors are installed on the intercooler, aftercooler, and oil cooler, enabling the temperature sensors to monitor the temperature of different nodes and obtain real-time dynamic temperatures. The temperature sensors simultaneously transmit temperature signals to the controller, allowing the controller to switch modes based on the real-time temperatures of the intercooler, aftercooler, and oil cooler. This achieves intelligent control of the compressor cooling fan, dynamically adjusts the operating efficiency of the power components, significantly reduces compressor energy consumption, and eliminates the need for manual switching of the inverter mode, providing greater convenience for staff.

[0010] Optionally, the fan includes a housing, a rotating shaft rotatably connected to the housing, an impeller mounted on the rotating shaft, a positioning block on the inner surface of the impeller, a positioning groove for the positioning block to be inserted into and slide on the rotating shaft, a recess for the positioning block to be inserted into the groove wall, a first placement groove on the groove wall, a first spring block in the first placement groove, the first spring block being located on the movement path of the positioning block inserting into the recess; when the positioning block is inserted into the recess, the first spring block abuts against the surface of the positioning block away from the recess.

[0011] By adopting the above technical solution, when the positioning block is inserted into the groove, the first spring block abuts against the surface of the positioning groove away from the groove, so that the first spring block can prevent the positioning block from falling out of the groove, thereby fixing the impeller and the shaft. The staff can install or remove the impeller by themselves, so that the staff can remove the impeller for cleaning, reducing the accumulation of dust or impurities on the fan and affecting the operation of the equipment. The staff can fix or separate the impeller and the shaft without installing or removing the cumbersome bolt structure, which provides greater convenience for the staff to clean the impeller.

[0012] Optionally, the positioning groove has a second placement groove on its wall, and a second spring block is provided in the second placement groove. The second spring block can deform in the direction of approaching the groove. When the positioning block drives the first spring block to be fully in the first placement groove, the second spring block drives the positioning block to be inserted into the groove together.

[0013] By adopting the above technical solution, when the positioning block drives the first spring block to be fully positioned in the first placement slot, the second spring block can deform in the direction of approaching the groove, so that the second spring block can drive the positioning block to be inserted into the groove together. The second spring block can provide a driving force to the positioning block, so that the positioning block can be inserted into the groove more smoothly. At the same time, by inserting the second spring block into the groove, the second spring block can prevent the first spring block from falling out of the first placement slot, making the overall structure more robust and stable, reducing the possibility of the positioning block falling out of the groove, thereby enhancing the overall stability of the fan.

[0014] Optionally, the length of the positioning block along the groove towards the second placement groove is greater than the length of the first placement groove along the groove towards the second placement groove; when all the first spring blocks are located in the first placement groove, the positioning block abuts against the groove wall of the positioning groove where the first placement groove is opened.

[0015] By adopting the above technical solution, when all the first spring blocks are located in the second placement groove, the length of the positioning block along the groove towards the second placement groove is greater than the length of the first placement groove along the groove towards the second placement groove, so that the positioning block can abut against the groove wall where the first placement groove is opened. The staff can intuitively feel the positioning block move into place, and then rotate the positioning block into the groove so that the staff can install the impeller onto the rotating shaft.

[0016] Optionally, the second spring block is provided with a guide slope, and the distance from the guide slope to the first placement groove gradually increases along the direction in which the second spring block is inserted into the groove.

[0017] By adopting the above technical solution, the distance from the guide slope to the first placement groove gradually increases along the direction of the second spring block insertion groove, so that the second spring block can be inserted into the groove more smoothly along the direction of the guide slope, reducing the occurrence of jamming when the first spring block and the second spring block come into contact, thereby enhancing the stability of the equipment.

[0018] Optionally, a baffle for sealing the positioning groove is slidably connected to the rotating shaft, the baffle is provided with a fixed iron sheet, and the rotating shaft is provided with a fixed magnet for attracting the fixed iron sheet; when the fixed magnet and the fixed iron sheet attract each other, the baffle seals the positioning groove.

[0019] By adopting the above technical solution, a baffle for sealing the positioning groove is slidably connected on the rotating shaft, so that after the impeller is installed on the rotating shaft, the baffle can seal the opening of the positioning groove, thereby reducing the possibility of dust or other impurities entering the positioning groove, preventing impurities from clogging the positioning groove and affecting the rotation of the impeller, and further enhancing the stability of the fan. By fixing the magnet and the iron plate to attract each other, the movement of the baffle during rotation is reduced, so that the baffle can stably seal the positioning groove.

[0020] Optionally, the rotating shaft is provided with a receiving groove for the baffle to slide, and the receiving groove is connected to the positioning groove.

[0021] By adopting the above technical solution, a receiving groove for the baffle to slide is provided on the rotating shaft, and the receiving groove is connected to the positioning groove, so that the baffle can slide in the receiving groove. This prevents the baffle from protruding from the outer surface of the rotating shaft and affecting the impeller installation, reduces the gap between the rotating shaft and the impeller, and thus enhances the stability of the fan structure.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. The power unit is equipped with a frequency converter for controlling the power of the power unit, and the frequency converter is electrically connected to a controller for adjusting different modes. The controller can drive the frequency converter to switch between energy-saving mode and stable mode to regulate the cooling fan of the compressor, thereby reducing the energy consumption of the compressor. The operator can adjust the operating power of the compressor according to the actual situation, so that the fan can run at low speed when the compressor is at low temperature and low load, thereby reducing energy consumption and operating noise. When the compressor is at high temperature and high load, the fan can run at full speed to provide the maximum cooling air volume.

[0023] 2. Temperature sensors are installed on the intercooler, aftercooler, and oil cooler, enabling them to monitor the temperature at different points and obtain real-time dynamic temperatures. The temperature sensors simultaneously transmit temperature signals to the controller, allowing the controller to switch modes based on the real-time temperatures of the intercooler, aftercooler, and oil cooler. This achieves intelligent control of the compressor cooling fan, dynamically adjusting the operating efficiency of the power components, significantly reducing compressor energy consumption. Operators do not need to manually switch the inverter mode, providing greater convenience. Attached Figure Description

[0024] Figure 1 This is a structural schematic diagram of Example 1; Figure 2 This is a structural schematic diagram of Example 2; Figure 3 This is an exploded view of the positioning groove in Example 2; Figure 4It is Example 2 Figure 3 An enlarged schematic diagram of part A in the middle.

[0025] Reference numerals: 1. Controller; 11. Inverter; 2. Fan; 21. Power component; 22. Impeller; 221. Positioning block; 3. Heat exchanger; 31. Intercooler; 32. Aftercooler; 33. Oil cooler; 34. Temperature sensor; 4. Shaft; 41. Positioning groove; 42. Groove; 43. First placement groove; 431. First spring block; 44. Second placement groove; 441. Second spring block; 442. Guide slope; 45. Receiving groove; 451. Baffle; 46. Fixing magnet. Detailed Implementation

[0026] The following is in conjunction with the appendix Figures 1-4 This application will be described in further detail.

[0027] Example 1 This embodiment discloses a variable frequency control system for a compressor cooling fan. (Refer to...) Figure 1 A variable frequency control system for a compressor cooling fan 2 includes a compressor body. A fan 2 for cooling the compressor body is rotatably connected within the compressor body. A power component 21, which is a motor, is electrically connected to the fan 2 to drive its rotation. A heat exchanger 3 is fixedly connected within the compressor body. The heat exchanger 3 includes an intercooler 31, an aftercooler 32, and an oil cooler 33. Temperature sensors 34 are fixedly connected to each of the intercooler 31, aftercooler 32, and oil cooler 33. The temperature sensors 34 can monitor the temperature at different points and transmit the temperature signals to a controller 1.

[0028] Reference Figure 1 The power unit 21 is electrically connected to a frequency converter 11 for controlling the power of the power unit 21. The frequency converter 11 is electrically connected to a controller 1 for adjusting different modes of the frequency converter 11. The controller 1 has an energy-saving button and a stability button, which are used to control the frequency converter 11 to enter one of the two modes, respectively. When the controller 1 is in energy-saving mode, it drives the frequency converter 11 to operate at the upper temperature limit, which is 70℃. When the controller 1 is in stability mode, it drives the frequency converter 11 to operate at the lower temperature limit, which is 0-5℃.

[0029] Reference Figure 1 The high-temperature gas compressed in the compressor body first enters the intercooler 31 for the first cooling and then is discharged. After the second compression, it enters the aftercooler 32 for the second cooling. The gas cooled to near the ambient temperature is discharged into the external refrigerated dryer. At the same time, the high-temperature lubricating oil enters the oil cooler 33 for cooling and is then reused in the compressor body.

[0030] The implementation principle of Example 1 is as follows: When the compressor compresses gas, it generates a large amount of heat. The air source generated by the fan 2 cools the gas in the heat exchanger 3. The high-temperature gas after the first stage of compression first enters the intercooler 31 for cooling. Then, after the second stage of compression, it enters the aftercooler 32 and is cooled to near the ambient temperature, causing the water vapor in it to condense into water and be separated and discharged to the external refrigerated dryer. The high-temperature lubricating oil that has mixed with the gas and absorbed a large amount of heat in the second stage of compression is led out to the oil cooler 33 through oil-gas separation. After being cooled in the oil cooler 33, the high-temperature oil is circulated back to the compressor body to perform the functions of lubrication, cooling and sealing again. The temperature sensor 34 transmits the temperature signal of the medium discharged from the intercooler 31, aftercooler 32 and oil cooler 33 to the controller 1. The controller 1 switches between energy-saving mode and stable mode according to the temperature at different positions, so that the frequency converter 11 controls the operating efficiency of the power component 21 to realize the intelligent control of the fan 2.

[0031] Example 2 Reference Figure 2 and Figure 3 The difference between this embodiment and Embodiment 1 is that the fan 2 includes a housing, and a rotating shaft 4 is rotatably connected inside the housing. An impeller 22 is detachably connected to the rotating shaft 4, and the impeller 22 is sleeved on the outer surface of the rotating shaft 4. Two positioning blocks 221 are fixedly connected to the inner surface of the impeller 22, and the two positioning blocks 221 are respectively located on opposite sides of the inner surface of the impeller 22 along the diameter direction. A positioning groove 41 is formed on the outer surface of the rotating shaft 4 for the corresponding positioning block 221 to be inserted and slidably. The positioning groove 41 extends to one side surface of the rotating shaft 4 along the length direction. A recess 42 is formed on the groove wall of the positioning groove 41 for the positioning block 221 to be inserted. When the positioning block 221 is inserted into the recess 42, the positioning block 221 is completely disengaged from the positioning groove 41.

[0032] Reference Figure 3 A first placement groove 43 is formed on the groove wall away from the through direction of the positioning groove 41. A first spring block 431 is fixedly connected in the first placement groove 43. The first spring block 431 deforms toward the bottom wall away from the first placement groove 43. When the first spring block 431 is in its natural state, the first spring block 431 extends out of the first placement groove 43 and is located on the moving path of the positioning block 221 inserted into the groove 42.

[0033] Reference Figure 3A second placement groove 44 is formed on the groove wall opposite to the opening of the positioning groove 41 and the groove 42. A second spring block 441 is fixedly connected in the second placement groove 44. The second spring block 441 deforms in the direction closer to the groove 42. When the second spring block 441 is in a stress-free state, the second spring block 441 extends out of the second placement groove 44 and can be inserted into the groove 42. The positioning block 221 first drives the first spring block 431 to fully enter the first placement groove 43, and then the second spring block 441 can drive the positioning block 221 to be inserted into the groove 42 together. At this time, the first spring block 431 is fully located in the first placement groove 43 and the first spring block 431 is in a compressed state.

[0034] Reference Figure 3 When the staff needs to disassemble the impeller 22, the staff rotates the impeller 22, causing the positioning block 221 to drive the second spring block 441 to fully enter the second placement groove 44. At this time, the first spring block 431 can drive the positioning block 221 to move away from the first placement groove 43. At this time, the second spring block 441 is restricted by the first spring block 431. The second spring block 441 is fully located in the second placement groove 44 and the second spring block 441 is in a compressed state. The positioning block 221 can be disassembled from the positioning groove 41 to realize the disassembly of the impeller 22.

[0035] Reference Figure 3 The length of the positioning block 221 along the groove 42 near the second placement groove 44 is greater than the length of the first placement groove 43 along the circumferential direction of the rotating shaft 4, and the length of the positioning block 221 along the axial direction of the rotating shaft 4 is greater than the length of the second placement groove 44 along the axial direction of the rotating shaft 4. When the positioning block 221 drives the first spring block 431 to fully enter the first placement groove 43, the positioning block 221 abuts against the groove wall of the positioning groove 41 where the first placement groove 43 is formed. When the positioning block 221 drives the second spring block 441 to fully enter the second placement groove 44, the positioning block 221 abuts against the groove wall of the positioning groove 41 where the second placement groove 44 is formed. The operator can visually feel the positioning block 221 moving into place by the position of the positioning block 221 abutting against the groove wall of the positioning groove 41, so that the operator can insert or remove the positioning block 221 from the groove 42.

[0036] Reference Figure 3 and Figure 4 The second spring block 441 has a guide slope 442 on its surface near the groove 42. The distance from the guide slope 442 to the bottom wall of the groove 42 gradually decreases along the direction in which the first spring block 431 extends out of the first placement groove 43. By the direction of the guide slope 442, the first spring block 431 and the second spring block 441 can slide more smoothly in an alternating manner.

[0037] Reference Figure 3A receiving groove 45 communicating with the positioning groove 41 is formed on the outer surface of the rotating shaft 4. A baffle 451 for sealing the positioning groove 41 is slidably connected in the receiving groove 45. A fixed iron sheet is fixedly connected to the surface of the baffle 451 near the rotating shaft 4, and a fixed magnet 46 for attracting the iron sheet is fixedly connected to the outer surface of the rotating shaft 4. When the fixed magnet 46 and the fixed iron sheet are attracted together, the baffle 451 can seal the opening of the positioning groove 41, preventing external dust or impurities from entering the positioning groove 41.

[0038] The implementation principle of Example 2 is as follows: After cleaning the disassembled impeller 22, the staff needs to reinstall it back onto the rotating shaft 4. The staff first inserts the positioning block 221 into the positioning groove 41 and slides it. At this time, the positioning block 221 drives the first spring block 431 to enter the first positioning groove 41. The staff then rotates the impeller 22 so that the positioning block 221 can be inserted into the groove 42 under the drive of the second spring block 441, so as to realize the installation of the impeller 22 onto the rotating shaft 4.

[0039] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," "third," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "an" or "a" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" and similar terms mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. "Above," "below," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0040] The above description is only a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the design concept of this application should be included within the protection scope of this application.

Claims

1. A variable frequency control system for a compressor cooling fan, comprising a compressor body, wherein a fan (2) is rotatably connected within the compressor body, the fan (2) is provided with a power component (21) for driving the fan (2) to rotate, and a heat exchanger (3) is provided within the compressor body, the heat exchanger (3) being able to achieve cooling through the air source generated by the fan (2), characterized in that: The power component (21) is equipped with a frequency converter (11) for controlling the power of the power component (21). The frequency converter (11) is electrically connected to a controller (1) for adjusting different modes. The controller (1) is equipped with an energy-saving button and a stability button. When the controller (1) is in the energy-saving mode, the controller (1) drives the frequency converter (11) to operate according to the upper limit of the temperature. When the controller (1) is in the stability mode, the controller (1) drives the frequency converter (11) to operate according to the lower limit of the temperature.

2. The variable frequency control system for a compressor cooling fan according to claim 1, characterized in that: The heat exchanger (3) includes an intermediate cooler (31), an aftercooler (32) and an oil cooler (33). Each of the intermediate cooler (31), the aftercooler (32) and the oil cooler (33) is equipped with a temperature sensor (34). The temperature sensor (34) can monitor the temperature of different nodes and transmit the temperature signal to the controller (1).

3. The variable frequency control system for a compressor cooling fan according to claim 1, characterized in that: The fan (2) includes a housing, on which a rotating shaft (4) is rotatably connected. An impeller (22) is provided on the rotating shaft (4). A positioning block (221) is provided on the inner surface of the impeller (22). A positioning groove (41) is provided on the rotating shaft (4) for the positioning block (221) to be inserted and slid. A groove (42) is provided on the groove wall of the positioning groove (41) for the positioning block (221) to be inserted. A first placement groove (43) is provided on the groove wall of the positioning groove (41). A first spring block (431) is provided in the first placement groove (43). The first spring block (431) is located on the moving path of the positioning block (221) to be inserted into the groove (42). When the positioning block (221) is inserted into the groove (42), the first spring block (431) abuts against the surface of the positioning block (221) away from the groove (42).

4. The variable frequency control system for a compressor cooling fan according to claim 3, characterized in that: The positioning groove (41) has a second placement groove (44) on its groove wall. The second placement groove (44) has a second spring block (441) inside it. The second spring block (441) can deform in the direction close to the groove (42). When the positioning block (221) drives the first spring block (431) to be fully located in the first placement groove (43), the second spring block (441) drives the positioning block (221) to be inserted into the groove (42) together.

5. The variable frequency control system for a compressor cooling fan according to claim 4, characterized in that: The length of the positioning block (221) along the groove (42) towards the second placement groove (44) is greater than the length of the first placement groove (43) along the groove (42) towards the second placement groove (44); when all the first spring blocks (431) are located in the first placement groove (43), the positioning block (221) abuts against the groove wall of the positioning groove (41) where the first placement groove (43) is opened.

6. The variable frequency control system for a compressor cooling fan according to claim 4, characterized in that: The second spring block (441) has a guide slope (442) and the distance from the guide slope (442) to the first placement groove (43) gradually increases along the direction in which the second spring block (441) is inserted into the groove (42).

7. The variable frequency control system for a compressor cooling fan according to claim 3, characterized in that: A baffle (451) for sealing the positioning groove (41) is slidably connected on the rotating shaft (4). A fixed iron sheet is provided on the baffle (451), and a fixed magnet (46) for adsorbing the fixed iron sheet is provided on the rotating shaft (4). When the fixed magnet (46) and the fixed iron sheet are attracted to each other, the baffle (451) seals the opening of the positioning groove (41).

8. The variable frequency control system for a compressor cooling fan according to claim 7, characterized in that: The rotating shaft (4) is provided with a receiving groove (45) for the baffle (451) to slide, and the receiving groove (45) is connected to the positioning groove (41).

Images