Nanometer material enhanced inverter compressor and control method thereof

Abstract

The invention discloses a nano material enhanced inverter compressor and a control method thereof. The nano material enhanced inverter compressor comprises a compression mechanism, an oil separator, a heat dissipation mechanism, a storage tank and a pipeline assembly. The compression mechanism comprises a compressor body and a first motor, a driving shaft of the first motor is connected with a double-screw assembly, the oil separator comprises a separation tank body, the separation tank body is provided with a separation valve group, the separation valve group is connected with at least a first pipe body and a second pipe body, the heat dissipation mechanism comprises a heat dissipation shell, and a plurality of heat dissipation grids are arranged on the heat dissipation shell. Compressed air flows through the heat dissipation grid for heat dissipation, high-temperature air is converted into low-temperature air, and then the low-temperature air is converged into the storage tank for storage through the pipeline assembly. According to the equipment, through cooperative work of all the components, the efficient, energy-saving and stable compressed air compression and treatment process is achieved, and the application range of the inverter compressor is widened.

Description

Technical Field

[0001] The present invention relates to the technical field of air compressors, and in particular to a nano material enhanced variable frequency compressor and a control method thereof. Background Art

[0002] With the continuous development of industrial production, compressed air has become an indispensable power source and process medium in many industries such as manufacturing, energy, chemical industry, and medicine. Efficient, energy-saving, and stable compressed air supply is essential to ensure the continuity of the production process and product quality. In modern industry with increasing automation, equipment has higher and higher requirements for the quality and stability of compressed air.

[0003] Existing air compressors usually use traditional designs and materials. The compression mechanism, oil separator, heat dissipation system and other parts work independently, lacking effective coordination and optimization. During the compression process, due to the large friction and wear between the screw, rotor and other components and the compression chamber, energy loss increases and compression efficiency decreases. In addition, the traditional compressor heat dissipation system is not efficient and cannot effectively reduce the temperature of the compressed air, affecting the quality of the compressed air and the operating stability of the equipment. At the same time, the existing technology lacks overall optimization of the various components of the compressor, and cannot achieve efficient energy utilization and stable operation control, which limits the application of compressors in a wider range of fields.

[0004] In view of this, it is necessary to improve the air compressor technology in the prior art to solve Summary of the invention The object of the present invention is to provide a nano material enhanced variable frequency compressor and a control method thereof to solve the above technical problems.

[0005] To achieve this object, the present invention adopts the following technical solutions: A nano-material enhanced variable frequency compressor, comprising a compression mechanism, an oil separator, a heat dissipation mechanism and a storage tank, and a pipeline assembly; the compression mechanism comprises a compressor body and a first motor, the compressor body is provided with a compression chamber for compressing gas, a driving shaft of the first motor is connected to a twin-screw assembly, the twin-screw assembly is arranged in the compression chamber, and the first motor is used to drive the twin-screw assembly to rotate, so that the compressed air moves along the pipeline assembly to the oil separator; The oil separator comprises a separation tank body, the separation tank body is provided with a separation valve group, the separation valve group is connected with at least a first pipe body and a second pipe body, the first pipe body is connected with the compressor body for oil return; the second pipe body is connected with the heat dissipation mechanism for delivering the gas separated from the oil to the heat dissipation mechanism; The heat dissipation mechanism includes a heat dissipation shell, on which a plurality of heat dissipation grilles are arranged. Compressed air flows through the heat dissipation grilles to dissipate heat, converting high-temperature air into low-temperature air, which is then collected into the storage tank through the pipeline assembly for storage.

[0006] Optionally, the twin-screw assembly includes a first screw and a second screw arranged side by side, and the first screw is connected to an output shaft of the first motor; Wherein, the first screw rod and the second screw rod are respectively provided with helical gears meshingly connected at 45 degrees.

[0007] Optionally, the first screw includes a screw body, and a first spiral portion disposed on the screw body, wherein the first spiral portion is provided in multiple groups, and the multiple groups of the first spiral portions are evenly arranged along the circumferential direction of the screw body; The first spiral portion has a spiral portion extending along the spiral line, and arc-shaped protruding portions are respectively provided on both sides of the spiral portion; The second screw rod is provided with a second spiral portion, and an arc-shaped groove matching the first spiral portion is formed between any two adjacent second spiral portions.

[0008] Optionally, the first spiral portion, the second spiral portion and the surface wall of the compression chamber are respectively provided with a nano material coating, and the nano material coating is a nano ceramic coating or a nano carbon-based coating.

[0009] Optionally, the heat dissipation mechanism is further provided with a heat dissipation fan, the heat dissipation fan is arranged opposite to the heat dissipation grille, and the heat dissipation fan is connected to a second motor; The center line of the heat dissipation grille in the length direction is set as a first center line, and the thickness of the heat dissipation grille is gradually reduced from the first center line to both sides.

[0010] Optionally, the pipeline assembly is provided with a control valve, and a flow sensor is provided at the control valve; The heat dissipation mechanism is provided with an air inlet and an air outlet. The air inlet is provided with a first temperature sensor, and the air outlet is provided with a second temperature sensor.

[0011] The present invention also provides a control method for a nano material enhanced variable frequency compressor, which is applied to control the nano material enhanced variable frequency compressor as described above, and the control method comprises: Step S1, collecting the flow data and temperature data of compressed air in real time through the flow sensor and temperature sensor integrated on the variable frequency compressor, and obtaining instantaneous state parameters based on the operating parameters of the variable frequency compressor; Step S2, establishing a compressor dynamic model of the variable frequency compressor based on the thermodynamic and fluid dynamic characteristics of the variable frequency compressor; Step S3, the control unit performs feedforward prediction of the temperature and flow of the compressed air by using a prediction algorithm in combination with the instantaneous state parameters of the compressor, and estimates the temperature and flow change trends at future moments; Step S4, based on the predicted temperature and flow rate change trends, the control unit generates a control strategy to adjust the speed of the first motor and the operating parameters of the heat dissipation mechanism to achieve pre-adjustment of the variable frequency compressor.

[0012] Optionally, the step S3 specifically includes: Step S31, the control unit receives and records the instantaneous state parameters at the current moment, the instantaneous state parameters include: Current flow data and temperature data of the compressed air; a current speed of the first motor; Current operating parameters of the heat dissipation mechanism; The inlet and outlet pressures of the compression mechanism; Environmental parameters: ambient temperature; Step S32, the control unit analyzes the instantaneous state parameters based on the compressor dynamic model, evaluates the current working state of the variable frequency compressor, and obtains an evaluation result; Step S33, the control unit predicts the compressed air temperature and flow rate change trends at future times by using a prediction algorithm in combination with the evaluation results; Step S34, the control unit outputs the predicted compressed air temperature and flow rate change trends at future moments for use in generating a control strategy, specifically including: Compare the forecast results with the preset target parameters to determine the deviation of future forecasts; Based on the predicted deviation, evaluate the range of control parameters that need to be adjusted; Output the predicted temperature and flow rate change trends to provide a basis for the formulation of control strategies.

[0013] Optionally, the step S32 specifically includes: Step S321, calculating the current compressed air generation rate according to the current rotation speed of the first motor and the structural parameters of the compression mechanism; Step S322, analyzing the temperature rise during the compression process through the thermodynamic characteristics of the compression mechanism to determine the change trend of the compressed air temperature; Step S323, comprehensively analyzing the current operating parameters of the heat dissipation mechanism to evaluate its cooling effect on the compressed air temperature; Step S324, evaluating the influence index of external factors on the operation of the compression mechanism in combination with the environmental parameters.

[0014] Optionally, the step S33 specifically includes: Step S331, predicting the flow rate change trend of the compressed air at a future moment according to the current flow rate data of the compressed air and the current speed of the first motor; Step S332, based on the compressor dynamic model, comprehensively considering the heat generated during the compression process and the cooling effect of the heat dissipation mechanism, predicting the temperature change trend of the compressed air at a future time; Step S333, according to the thermodynamic and fluid dynamic characteristics of the compression mechanism and the heat dissipation mechanism, determine the lag time T and ∆t, and correct the predicted temperature and flow data to the future time t1=t+T+∆t; Step S334, calculating the change rates ∆T and ∆Q of the temperature and flow rate according to the corrected temperature and flow rate data at the future moment and the current temperature and flow rate data; Step S335, judging the rising or falling trend of the temperature and flow rate according to the positive or negative values ​​of ∆T and ∆Q.

[0015] Compared with the prior art, the present invention has the following beneficial effects: during operation, air is first sucked into the compression chamber in the compressor body, the first motor drives the twin-screw assembly to rotate at high speed to compress the air, and the high-temperature and high-pressure air generated by the compression enters the oil separator through the pipeline assembly, the oil separator separates the oil mist and impurities in the air, and the separated oil flows back to the compressor body through the first pipe body to achieve recycling; the clean compressed air is transported to the heat dissipation mechanism through the second pipe body, heat exchange is carried out in the heat dissipation grille, and the temperature is reduced; finally, the cooled low-temperature compressed air enters the storage tank through the pipeline assembly for storage or supply to subsequent equipment; the equipment realizes efficient, energy-saving and stable compressed air compression and processing process through the coordinated work of various components, and broadens the application scope of variable frequency compressors. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantive technical significance. Any structural modification, change in proportion or adjustment of size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed by the present invention.

[0018] Figure 1 This is a schematic diagram of the overall structure of the nano material enhanced variable frequency compressor of the first embodiment; Figure 2 This is a schematic structural diagram of the heat dissipation mechanism and compression mechanism of the nano-material enhanced variable frequency compressor of the first embodiment; Figure 3 This is a schematic diagram of the main structure of the nano-material enhanced variable frequency compressor of the first embodiment; Figure 4 This is a schematic diagram of the internal structure of the compression mechanism of the nano-material enhanced variable frequency compressor of the first embodiment; Figure 5 This is a schematic diagram of the structure of the first screw of the nanomaterial enhanced variable frequency compressor of the first embodiment.

[0019] Illustrations: compression mechanism 10, oil separator 20, heat dissipation mechanism 30, storage tank 40, pipeline assembly 50, compressor body 11, first motor 12, twin-screw assembly 13, separation tank body 21, separation valve group 22, first tube body 23, second tube body 24, heat dissipation shell 31, heat dissipation grille 32, first screw 131, second screw 132, bevel gear 133, screw body 1311, first spiral portion 1312, spiral portion 1313, arc-shaped protrusion 1314, heat dissipation fan 33, second motor 34, control valve 51. DETAILED DESCRIPTION

[0020] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] In the description of the present invention, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. It should be noted that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centrally arranged component at the same time.

[0022] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0023] Embodiment 1: Combination Figures 1 to 5 As shown, an embodiment of the present invention provides a nanomaterial enhanced variable frequency compressor, including a compression mechanism 10, an oil separator 20, a heat dissipation mechanism 30 and a storage tank 40, and a pipeline assembly 50; the compression mechanism 10 includes a compressor body 11 and a first motor 12, the compressor body 11 is provided with a compression chamber for compressing gas, the driving shaft of the first motor 12 is connected to a twin-screw assembly 13, the twin-screw assembly 13 is arranged in the compression chamber, and the first motor 12 is used to drive the twin-screw assembly 13 to rotate, so that the compressed air moves along the pipeline assembly 50 to the oil separator 20.

[0024] The oil separator 20 includes a separation tank 21, which is provided with a separation valve group 22, and the separation valve group 22 is connected with at least a first pipe 23 and a second pipe 24. The first pipe 23 is connected to the compressor body 11 for oil return, so as to realize the recycling of lubricating oil and reduce the operation cost. The second pipe 24 is connected to the heat dissipation mechanism 30, and is used to transport the gas after oil separation to the heat dissipation mechanism 30, and transport the clean gas after oil separation to the heat dissipation mechanism 30 for further processing.

[0025] The heat dissipation mechanism 30 includes a heat dissipation shell 31, on which a plurality of heat dissipation grilles 32 are arranged. Compressed air flows through the heat dissipation grilles 32 to dissipate heat, converting high-temperature air into low-temperature air, and then flows into the storage tank 40 through the pipeline assembly 50 for storage.

[0026] The working principle of the present invention is as follows: during operation, air is first sucked into the compression chamber in the compressor body 11, and the first motor 12 drives the twin-screw assembly 13 to rotate at high speed to compress the air. The high-temperature and high-pressure air generated by the compression enters the oil separator 20 through the pipeline assembly 50, and the oil separator 20 separates the oil mist and impurities in the air. The separated oil flows back to the compressor body 11 through the first pipe body 23 to achieve recycling; the clean compressed air is transported to the heat dissipation mechanism 30 through the second pipe body 24, and heat exchange is performed in the heat dissipation grille 32 to reduce the temperature; finally, the cooled low-temperature compressed air enters the storage tank 40 through the pipeline assembly 50 for storage or supply to subsequent equipment; the equipment realizes efficient, energy-saving and stable compressed air compression and processing process through the coordinated work of various components, and broadens the application scope of variable frequency compressors.

[0027] In this embodiment, it is specifically described that the twin-screw assembly 13 includes a first screw 131 and a second screw 132 arranged side by side, and the first screw 131 is connected to the output shaft of the first motor 12; wherein the first screw 131 and the second screw 132 are respectively provided with a helical gear 133 meshingly connected at 45 degrees. Through the meshing transmission of the helical gear 133, the two screws can rotate synchronously in opposite directions to achieve efficient compression of the gas. The design of the helical gear 133 not only improves the smoothness of the transmission, but also reduces vibration and noise, thereby improving the operating efficiency and stability of the compressor.

[0028] In the present embodiment, it is further described that the first screw 131 includes a screw body 1311, and a first spiral portion 1312 arranged on the screw body 1311, and the first spiral portion 1312 is provided with multiple groups, and the multiple groups of first spiral portions 1312 are evenly arranged along the circumferential direction of the screw body 1311; the first spiral portion 1312 has a spiral portion 1313 extending along the spiral line, and arc-shaped protrusions 1314 are respectively provided on both sides of the spiral portion 1313; a second spiral portion is provided on the second screw 132, and an arc-shaped groove matching the first spiral portion 1312 is formed between any two adjacent second spiral portions.

[0029] It should be noted that each first spiral portion 1312 has a spiral portion 1313 extending along the spiral line, and protruding arc-shaped protrusions 1314 are respectively provided on both sides of the spiral portion 1313. Such a design increases the contact area between the screw and the air and improves the compression efficiency. A second spiral portion is provided on the second screw 132, and an arc-shaped groove matching the first spiral portion 1312 is formed between any two adjacent second spiral portions. The arc-shaped protrusion 1314 of the first spiral portion 1312 is tightly matched with the arc-shaped groove of the second spiral portion, forming a good sealing effect, reducing air leakage, and further improving the compression efficiency.

[0030] In this embodiment, it is further explained that the first spiral portion 1312, the second spiral portion and the surface wall of the compression chamber are respectively provided with nano material coatings, and the nano material coatings are nano ceramic coatings or nano carbon-based coatings.

[0031] It should be noted that nanomaterials have the characteristics of low friction coefficient and high hardness. Coating them on the surface of the screw and compression chamber can significantly reduce friction loss during operation and extend the service life of components. At the same time, nano coatings also have excellent corrosion resistance and high temperature resistance.

[0032] In this embodiment, the heat dissipation mechanism 30 is also provided with a heat dissipation fan 33, which is arranged opposite to the heat dissipation grille 32, and the heat dissipation fan 33 is connected to a second motor 34; wherein, the center line of the length direction of the heat dissipation grille 32 is set as the first center line, and the thickness of the heat dissipation grille 32 is gradually reduced from the first center line toward both sides.

[0033] This gradient thickness design can increase the heat dissipation surface area, improve the heat dissipation effect, and make the high-temperature air more fully cooled when passing through the heat dissipation grille 32, thereby improving the performance of the entire heat dissipation system. At the same time, it is further explained that the shape design of the heat dissipation grille 32 needs to be combined with the wind direction design of the heat dissipation fan 33. When the cooling airflow provided by the heat dissipation fan 33 passes through the streamlined outer wall, the wind resistance can be reduced and the cooling contact area can be fully increased, thereby reducing the generation of noise.

[0034] In this embodiment, the pipeline assembly 50 is provided with a control valve 51, and a flow sensor is provided at the control valve 51; the heat dissipation mechanism 30 is provided with an air inlet and an air outlet, a first temperature sensor is provided at the air inlet, and a second temperature sensor is provided at the air outlet.

[0035] By monitoring the temperature of the air inlet and outlet, we can obtain the change data of air temperature before and after heat dissipation. The data collected by these sensors are transmitted to the control unit, which analyzes and adjusts the operating status of the compressor based on the real-time flow and temperature information to achieve control of the compression process.

[0036] Embodiment 2: The present invention also provides a control method for a nano material enhanced variable frequency compressor, which is applied to control the nano material enhanced variable frequency compressor of the first embodiment. The control method includes: Step S1, using the flow sensor and temperature sensor integrated on the variable frequency compressor, the flow data and temperature data of the compressed air are collected in real time, and the instantaneous state parameters are obtained based on the operating parameters of the variable frequency compressor.

[0037] It should be noted that, through the flow sensor and the temperature sensor, the system can obtain the key parameters of the compressor during operation. Subsequently, the collected data is sorted out in combination with the operating parameters of the variable frequency compressor, such as the current speed of the first motor 12, the compression ratio, the ambient temperature, etc., to obtain the instantaneous state parameters of the compressor.

[0038] Step S2, establishing a compressor dynamic model of the variable frequency compressor based on the thermodynamic and fluid dynamic characteristics of the variable frequency compressor.

[0039] The process of establishing the compressor dynamic model is to clarify the relationship between the flow rate of compressed air and the rotation speed of the first motor 12, the internal volume of the compressor and the volumetric efficiency. Generally, the higher the motor speed, the greater the output flow rate of compressed air.

[0040] Describes the temperature variation of compressed air during the compression process, including the heat generated by compression and the cooling effect of the heat dissipation mechanism 30. The model takes into account factors such as the reversibility of the compression process, the compression ratio, and the specific heat capacity of air.

[0041] The energy balance relationship of the system is established by combining the input power, compression work, heat loss and heat dissipation of the compressor, reflecting the efficiency and thermal characteristics of the compressor.

[0042] In step S3, the control unit performs feedforward prediction of the temperature and flow of the compressed air through a prediction algorithm combined with the instantaneous state parameters of the compressor, and estimates the temperature and flow change trends at future moments.

[0043] Step S4, based on the predicted temperature and flow rate change trends, the control unit generates a control strategy to adjust the rotation speed of the first motor 12 and the operating parameters of the heat dissipation mechanism 30 to achieve pre-adjustment of the variable frequency compressor.

[0044] Among them, the specific process of the control unit generating the control strategy is: 1. Determine the adjustment direction: According to the positive or negative deviation, determine whether to increase or decrease the corresponding control parameters. For example: If the temperature is predicted to rise above an upper limit, measures need to be taken to reduce the temperature.

[0045] If the flow rate is predicted to be below the lower limit, the flow rate needs to be increased.

[0046] 2. Determine the adjustment range: According to the size of the deviation, calculate the required adjustment range to accurately control the system.

[0047] Select control measures: There are two main aspects: 1. Adjusting the speed of the first motor 12: Increasing the rotation speed: If the flow rate or compression ratio of the compressed air needs to be increased, the rotation speed of the first motor 12 can be increased.

[0048] Reducing the speed: If it is necessary to reduce the generation of compression heat to lower the temperature, the speed of the first motor 12 may be reduced.

[0049] 2. Adjust the operating parameters of the heat dissipation mechanism 30: Increase heat dissipation intensity: increase the rotation speed of the heat dissipation fan 33, increase the flow rate of the cooling medium or reduce the temperature of the cooling medium to enhance the heat dissipation effect.

[0050] Optimize the heat dissipation path: adjust the opening of the heat dissipation grille 32 or change the air flow path to improve the heat dissipation efficiency.

[0051] In this embodiment, it is specifically described that step S3 specifically includes: Step S31: The control unit receives and records the instantaneous state parameters at the current moment. The instantaneous state parameters include: The current flow data and temperature data of the compressed air are measured in real time by the flow sensor and temperature sensor, reflecting the instant delivery volume and temperature level of the compressed air.

[0052] The current rotation speed of the first motor 12 is used to understand the working intensity and load condition of the compressor by monitoring the operating speed of the first motor 12. The change of the rotation speed directly affects the flow rate and pressure of the compressed air.

[0053] The current operating parameters of the heat dissipation mechanism 30, including the rotation speed of the heat dissipation fan 33, the flow rate of the cooling medium, etc., reflect the operating status and cooling capacity of the heat dissipation system.

[0054] The inlet pressure and outlet pressure of the compression mechanism 10 are acquired through a pressure sensor, reflecting the pressure difference during the compression process.

[0055] Environmental parameters Ambient temperature, ambient temperature and other external conditions will affect the heat dissipation efficiency of the compressor and the physical properties of the compressed air.

[0056] Step S32, the control unit analyzes the instantaneous state parameters based on the compressor dynamic model, evaluates the current working state of the variable frequency compressor, and obtains an evaluation result; The control unit uses the pre-established compressor dynamic model to conduct in-depth analysis of the instantaneous state parameters collected in real time. The compressor dynamic model is based on the thermodynamic and fluid mechanics characteristics of the compressor and describes the relationship and change rules between the various operating parameters of the compressor.

[0057] In step S33, the control unit predicts the compressed air temperature and flow rate change trends at future times through a prediction algorithm combined with the evaluation results.

[0058] Step S34, the control unit outputs the predicted compressed air temperature and flow rate change trends at future moments for use in generating a control strategy, specifically including: Compare the prediction results with the preset target parameters to determine the deviation of future predictions; compare the predicted temperature and flow data with the system preset target parameters (such as ideal temperature range, flow range) to determine possible deviations in the future, including the size and direction of the deviation.

[0059] According to the predicted deviation, evaluate the range of control parameters that need to be adjusted; according to the predicted deviation, determine the control parameters that need to be adjusted and the corresponding adjustment range. For example: If the predicted temperature will exceed the upper limit, it is necessary to increase the heat dissipation intensity or reduce the compression load; If the predicted flow rate is lower than the lower limit, the rotation speed of the first motor 12 needs to be increased to increase the output of compressed air.

[0060] Output the predicted temperature and flow rate change trends to provide a basis for the formulation of control strategies.

[0061] In this embodiment, it is specifically described that step S32 specifically includes: Step S321, calculate the current compressed air generation rate according to the current rotational speed of the first motor 12 and the structural parameters of the compression mechanism 10; by combining the current rotational speed of the first motor 12 with the structural parameters of the compression mechanism 10, the control unit can accurately calculate the compressed air generation rate at the current moment, that is, the amount of compressed air generated per unit time.

[0062] Step S322, analyzing the temperature rise during the compression process through the thermodynamic characteristics of the compression mechanism 10 to determine the change trend of the compressed air temperature; During the compression process, the air is compressed, the pressure increases, and the volume decreases. According to the laws of thermodynamics, this process will cause the air temperature to rise. The compression ratio, compression efficiency, and the nature of the compression process (such as adiabatic or isothermal) will affect the temperature rise. Using thermodynamic formulas, combined with the current compression ratio and the physical parameters of the air, calculate the temperature rise generated during the compression process. Based on the temperature rise calculation results, combined with the current initial temperature of the compressed air, predict the change trend of the compressed air temperature in the near future and determine whether the temperature will continue to rise, remain stable, or may drop.

[0063] Step S323, comprehensively analyzing the current operating parameters of the heat dissipation mechanism 30 to evaluate its cooling effect on the compressed air temperature; The control unit uses the above parameters and the heat transfer principle to calculate the current cooling capacity of the heat dissipation mechanism 30 and evaluate its effect on reducing the compressed air temperature. This evaluation helps determine whether the heat dissipation mechanism 30 needs to adjust operating parameters to meet current or future cooling needs.

[0064] Step S324, evaluating the influence index of external factors on the operation of the compression mechanism 10 in combination with the environmental parameters.

[0065] By evaluating the impact of external factors, the control unit can more accurately predict the operating status of the compressor and adjust the control strategy when necessary to adapt to environmental changes and ensure efficient and stable operation of the compressor.

[0066] In this embodiment, it is further explained that step S33 specifically includes: Step S331, predicting the flow change trend of the compressed air at a future moment according to the current flow data of the compressed air and the current rotation speed of the first motor 12; if the rotation speed of the first motor 12 is expected to increase, the predicted flow rate will increase accordingly, and vice versa.

[0067] Step S332, based on the compressor dynamic model, taking into account the heat generated during the compression process and the cooling effect of the heat dissipation mechanism 30, predict the temperature change trend of the compressed air at future times; if it is predicted that the compressed air flow rate will increase and the heat dissipation capacity is insufficient, the temperature may rise.

[0068] Step S333, according to the thermodynamic and fluid dynamic characteristics of the compression mechanism 10 and the heat dissipation system, the lag time T and ∆t are determined, and the predicted temperature and flow data are corrected to the future time t1=t+T+∆t.

[0069] Step S334, calculating the change rates ∆T and ∆Q of the temperature and flow rate based on the corrected temperature and flow rate data at the future moment and the current temperature and flow rate data.

[0070] Step S335, judging the rising or falling trend of the temperature and flow rate according to the positive or negative values ​​of ∆T and ∆Q.

[0071] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A nano-material enhanced variable frequency compressor, characterized in that: The invention comprises a compression mechanism, an oil separator, a heat dissipation mechanism and a storage tank, and a pipeline assembly; the compression mechanism comprises a compressor body and a first motor, the compressor body is provided with a compression chamber for compressing gas, a driving shaft of the first motor is connected to a twin-screw assembly, the twin-screw assembly is arranged in the compression chamber, and the first motor is used to drive the twin-screw assembly to rotate, so that the compressed air moves along the pipeline assembly to the oil separator; The oil separator comprises a separation tank body, the separation tank body is provided with a separation valve group, the separation valve group is connected with at least a first pipe body and a second pipe body, the first pipe body is connected with the compressor body for oil return; the second pipe body is connected with the heat dissipation mechanism for delivering the gas separated from the oil to the heat dissipation mechanism; The heat dissipation mechanism includes a heat dissipation shell, on which a plurality of heat dissipation grilles are arranged. Compressed air flows through the heat dissipation grilles to dissipate heat, converting high-temperature air into low-temperature air, which is then collected into the storage tank through the pipeline assembly for storage.

2. The nanomaterial enhanced variable frequency compressor according to claim 1, characterized in that: The twin-screw assembly comprises a first screw and a second screw arranged side by side, wherein the first screw is connected to an output shaft of the first motor; Wherein, the first screw rod and the second screw rod are respectively provided with helical gears meshingly connected at 45 degrees.

3. The nanomaterial enhanced variable frequency compressor according to claim 2, characterized in that: The first screw includes a screw body and a first spiral portion disposed on the screw body, wherein the first spiral portion is provided in a plurality of groups, and the plurality of groups of the first spiral portions are evenly arranged along the circumferential direction of the screw body; The first spiral portion has a spiral portion extending along the spiral line, and arc-shaped protruding portions are respectively provided on both sides of the spiral portion; The second screw rod is provided with a second spiral portion, and an arc-shaped groove matching the first spiral portion is formed between any two adjacent second spiral portions.

4. The nanomaterial enhanced variable frequency compressor according to claim 3, characterized in that: The first spiral portion, the second spiral portion and the surface wall of the compression chamber are respectively provided with nano material coatings, and the nano material coatings are nano ceramic coatings or nano carbon-based coatings.

5. The nanomaterial enhanced variable frequency compressor according to claim 1, characterized in that: The heat dissipation mechanism is further provided with a heat dissipation fan, the heat dissipation fan is arranged opposite to the heat dissipation grille, and the heat dissipation fan is connected to a second motor; The center line of the heat dissipation grille in the length direction is set as a first center line, and the thickness of the heat dissipation grille is gradually reduced from the first center line to both sides.

6. The nanomaterial enhanced variable frequency compressor according to claim 1, characterized in that: The pipeline assembly is provided with a control valve, and a flow sensor is provided at the control valve; The heat dissipation mechanism is provided with an air inlet and an air outlet. The air inlet is provided with a first temperature sensor, and the air outlet is provided with a second temperature sensor.

7. A control method for a nanomaterial enhanced variable frequency compressor, characterized in that: Applied to controlling the nanomaterial enhanced variable frequency compressor according to any one of claims 1 to 6, the control method comprises: Step S1, collecting the flow data and temperature data of compressed air in real time through the flow sensor and temperature sensor integrated on the variable frequency compressor, and obtaining instantaneous state parameters based on the operating parameters of the variable frequency compressor; Step S2, establishing a compressor dynamic model of the variable frequency compressor based on the thermodynamic and fluid dynamic characteristics of the variable frequency compressor; Step S3, the control unit performs feedforward prediction of the temperature and flow of the compressed air by using a prediction algorithm in combination with the instantaneous state parameters of the compressor, and estimates the temperature and flow change trends at future moments; Step S4, based on the predicted temperature and flow rate change trends, the control unit generates a control strategy to adjust the speed of the first motor and the operating parameters of the heat dissipation mechanism to achieve pre-adjustment of the variable frequency compressor.

8. The control method of the nanomaterial enhanced variable frequency compressor according to claim 7, characterized in that: The step S3 specifically includes: Step S31, the control unit receives and records the instantaneous state parameters at the current moment, the instantaneous state parameters include: Current flow data and temperature data of the compressed air; a current rotation speed of the first motor; Current operating parameters of the heat dissipation mechanism; The inlet and outlet pressures of the compression mechanism; Environmental parameters: ambient temperature; Step S32, the control unit analyzes the instantaneous state parameters based on the compressor dynamic model, evaluates the current working state of the variable frequency compressor, and obtains an evaluation result; Step S33, the control unit predicts the compressed air temperature and flow rate change trends at future times by using a prediction algorithm in combination with the evaluation results; Step S34, the control unit outputs the predicted compressed air temperature and flow rate change trends at future moments for use in generating a control strategy, specifically including: Compare the forecast results with the preset target parameters to determine the deviation of future forecasts; Based on the predicted deviation, evaluate the range of control parameters that need to be adjusted; Output the predicted temperature and flow rate change trends to provide a basis for the formulation of control strategies.

9. The control method of the nanomaterial enhanced variable frequency compressor according to claim 8, characterized in that: The step S32 specifically includes: Step S321, calculating the current compressed air generation rate according to the current rotation speed of the first motor and the structural parameters of the compression mechanism; Step S322, analyzing the temperature rise during the compression process through the thermodynamic characteristics of the compression mechanism to determine the change trend of the compressed air temperature; Step S323, comprehensively analyzing the current operating parameters of the heat dissipation mechanism to evaluate its cooling effect on the compressed air temperature; Step S324, evaluating the influence index of external factors on the operation of the compression mechanism in combination with the environmental parameters.

10. The control method of the nano material enhanced variable frequency compressor according to claim 8, characterized in that: The step S33 specifically includes: Step S331, predicting the flow rate change trend of the compressed air at a future moment according to the current flow rate data of the compressed air and the current speed of the first motor; Step S332, based on the compressor dynamic model, comprehensively considering the heat generated during the compression process and the cooling effect of the heat dissipation mechanism, predicting the temperature change trend of the compressed air at a future time; Step S333, according to the thermodynamic and fluid dynamic characteristics of the compression mechanism and the heat dissipation mechanism, determine the lag time T and ∆t, and correct the predicted temperature and flow data to the future time t1=t+T+∆t; Step S334, calculating the change rates ∆T and ∆Q of the temperature and flow rate according to the corrected temperature and flow rate data at the future moment and the current temperature and flow rate data; Step S335, judging the rising or falling trend of the temperature and flow rate according to the positive or negative values ​​of ∆T and ∆Q.

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