Integrated screw air compressor driven by liquid-cooled motor frequency converter

Abstract

The utility model discloses a screw air compressor driven by an integrated liquid-cooled motor frequency converter. The screw air compressor comprises the integrated liquid-cooled motor frequency converter, a screw compressor body, a main control circuit and a sensing module, the integrated liquid-cooled motor frequency converter comprises a motor, a frequency converter body and a liquid-cooled heat dissipation component, the motor and the frequency converter body are integrated, and signal and power transmission is achieved through internal connection; the liquid cooling heat dissipation part is connected with the motor and the frequency converter and takes away heat generated by the motor and the frequency converter through cooling liquid circulation. The sensing module is connected with the integrated liquid cooling motor frequency converter and the screw compressor body and monitors operation state data of the motor, the frequency converter and the screw compressor body in real time. The screw air compressor provided by the utility model has the advantages of high efficiency, energy conservation, good heat dissipation, simplified system structure, easiness in maintenance and the like, can be widely applied to the fields of manufacturing industry, building industry, energy sources and the like, and provides efficient and reliable compressed air supply for industrial production and intelligent manufacturing.

Description

TECHNICAL FIELD

[0001] The utility model belongs to compressor technical field relates to an air compressor especially relates to a screw air compressor of integrated liquid cooling motor frequency converter drive. BACKGROUND

[0002] Screw air compressor because its high efficiency, stable, easy maintenance characteristics, in the industrial production and manufacturing field has been widely applied. However, the traditional screw air compressor in the drive system and heat dissipation has the deficiency. Such as motor and frequency converter separation design leads to complex system, high energy consumption, in addition, the air cooling heat dissipation mode heat dissipation effect is limited, there is prone to cause equipment overheating and so on.

[0003] In view of this, now urgently needed to design a new screw air compressor, in order to overcome the existing screw air compressor at least part of the above-mentioned defects. INVENTION CONTENTS

[0004] The utility model provides a screw air compressor of integrated liquid cooling motor frequency converter drive can improve work efficiency, save energy, and the product has good heat dissipation performance, and easy to maintain, can provide efficient, reliable compressed air supply for industrial production and intelligent manufacturing.

[0005] To solve the above technical problems, according to one aspect of the utility model, adopt the following technical scheme:

[0006] A screw air compressor, the screw air compressor includes: integrated liquid cooling motor frequency converter, screw compressor body, main control circuit and sensing module group;

[0007] The integrated liquid cooling motor frequency converter includes motor, frequency converter and liquid cooling heat dissipation component, the motor and frequency converter are integrated, realize signal and power transmission through internal connection;The liquid cooling heat dissipation component is connected with the motor and frequency converter respectively, and the heat generated by the motor and frequency converter is taken away by cooling liquid circulation;

[0008] The sensing module group is connected with the integrated liquid cooling motor frequency converter and screw compressor body respectively, and the running state data of the motor, frequency converter and screw compressor body is monitored in real time;The sensing module group includes temperature sensor, pressure sensor and current acquisition circuit;

[0009] The temperature sensor is used for collecting the temperature of the set region, the pressure sensor is used for collecting the pressure of the set region, and the current acquisition circuit is used for collecting the output voltage, output current and frequency of the frequency converter;

[0010] The output end of the sensing module group is connected with the output end of the main control circuit, and the sensed data can be sent to the main control circuit;

[0011] The output ends of the master control circuit are connected with the input ends of the integrated liquid-cooled motor inverter and the input end of the screw compressor body respectively, so as to send control signals to control the operation of the integrated liquid-cooled motor inverter and the screw compressor body.

[0012] As an embodiment of the utility model, the liquid cooling heat dissipation component comprises a cooling liquid circulating pump, a radiator and a cooling liquid pipeline; the radiator is connected with the cooling liquid circulating pump, the motor and the inverter through the cooling liquid pipeline respectively;

[0013] The motor is provided with a first cooling liquid flow channel, the inverter is provided with a second cooling liquid flow channel, and the cooling liquid pipeline is connected with the first cooling liquid flow channel and the second cooling liquid flow channel respectively.

[0014] As an embodiment of the utility model, the screw compressor body comprises a shell, a female rotor, a male rotor, a transmission mechanism, a bearing and a sealing element, and the female rotor, the male rotor, the transmission mechanism, the bearing and the sealing element are arranged based on the shell.

[0015] The female rotor is connected with the motor and can rotate under the driving of the motor; the female rotor is connected with the male rotor through the transmission mechanism and can drive the male rotor to rotate.

[0016] As an embodiment of the utility model, the master control circuit is further connected with an actuator, and the rotating speed of the motor and the output frequency of the inverter are adjusted through the actuator.

[0017] As an embodiment of the utility model, the sensing module comprises a plurality of temperature sensors, and the temperature sensors are distributed on the exhaust port of the compression host, the motor coil and the heat dissipation module of the inverter.

[0018] As an embodiment of the utility model, the pressure sensor is arranged on the exhaust port of the pressure host.

[0019] As an embodiment of the utility model, the current acquisition circuit is arranged in the inverter.

[0020] As an embodiment of the utility model, each component of the screw air compressor adopts modular design, which is convenient for maintenance and upgrading; each module is connected through a standardized interface, so as to ensure the expansibility and compatibility of the system. At the same time, the modular design also improves the reliability and flexibility of the equipment, and the equipment can be flexibly configured according to actual needs.

[0021] The beneficial effects of this utility model are as follows: The integrated liquid-cooled motor frequency converter driven screw air compressor proposed in this utility model has the advantages of high efficiency and energy saving, good heat dissipation, simplified system structure and easy maintenance. It can be widely used in manufacturing, construction, energy and other fields to provide efficient and reliable compressed air supply for industrial production and intelligent manufacturing.

[0022] High efficiency and energy saving: This utility model achieves high efficiency and energy saving and stable operation of the equipment by adopting an integrated liquid-cooled motor frequency converter and intelligent control system; compared with traditional screw air compressors, energy consumption is reduced by more than 20%.

[0023] Excellent heat dissipation: This invention employs liquid cooling technology, effectively reducing the temperature of the motor and inverter, thus improving system stability and lifespan. Simultaneously, it also reduces noise and pollutant emissions.

[0024] Simplified system structure: This utility model adopts an integrated design, which reduces connecting parts and cables, reduces system complexity and failure rate, and improves overall reliability.

[0025] Easy to maintain: The modular design of this invention facilitates maintenance and upgrades, reducing maintenance costs and time. Meanwhile, the standardized interfaces between modules improve the compatibility and scalability of the equipment. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the screw air compressor in one embodiment of the present invention.

[0027] Figure 2 This is a schematic diagram of the composition of a screw air compressor in one embodiment of the present invention.

[0028] Figure 3 This is a schematic diagram of the integrated liquid-cooled motor frequency converter in one embodiment of the present invention.

[0029] Figure 4 This is a circuit diagram of the current acquisition circuit in one embodiment of the present invention. Detailed Implementation

[0030] The preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0031] To further understand this utility model, preferred embodiments of this utility model are described below in conjunction with examples. However, it should be understood that these descriptions are only for further illustrating the features and advantages of this utility model, and not for limiting the scope of the claims of this utility model.

[0032] The description in this section pertains to only a few typical embodiments, and this utility model is not limited to the scope of the embodiments described. Substitution of identical or similar prior art methods with some technical features in the embodiments is also within the scope of this utility model's description and protection.

[0033] The term "connection" in the specification includes both direct and indirect connections, such as connections made through active devices, passive devices, or electrical conduction media; it may also include connections made by other active or passive devices that are known to those skilled in the art and can achieve the same or similar functional purpose, such as connections made through circuits or components such as switches or follower circuits.

[0034] This utility model discloses a screw air compressor driven by an integrated liquid-cooled motor frequency converter. Figure 1 This is a schematic diagram of the screw air compressor in one embodiment of the present invention; please refer to [link / reference]. Figure 1 The screw air compressor includes: an integrated liquid-cooled motor frequency converter 1, a screw compressor body 2, a main control circuit 3, and a sensing module 4.

[0035] The integrated liquid-cooled motor inverter includes a motor 11, an inverter 12, and a liquid-cooled heat dissipation component. The motor 11 and the inverter 12 are integrated into one unit and signal and power transmission is achieved through internal connection. The liquid-cooled heat dissipation component is connected to the motor 11 and the inverter 12 respectively, and the heat generated by the motor 11 and the inverter 12 is removed by the circulation of coolant.

[0036] The sensing module 4 is connected to the integrated liquid-cooled motor inverter 1 and the screw compressor body 2, respectively, to monitor the operating status data of the motor 11, inverter 12, and screw compressor body 2 in real time. The sensing module 4 includes a temperature sensor 41, a pressure sensor 42, and a current acquisition circuit 43. The temperature sensor 41 is used to collect the temperature of a set area, the pressure sensor 42 is used to collect the pressure of the set area, and the current acquisition circuit 43 is used to collect the output voltage, output current, and operating frequency of the inverter. The output terminal of the sensing module 4 is connected to the output terminal of the main control circuit 3, enabling it to send the sensed data to the main control circuit 3.

[0037] The output terminal of the main control circuit 3 is connected to the input terminal of the integrated liquid-cooled motor inverter 1 and the input terminal of the screw compressor body 2, respectively, and can send control signals to the integrated liquid-cooled motor inverter 1 and the screw compressor body 2 to control their operation. The main control circuit 3 can be further connected to an actuator 5, which can adjust the speed of the motor and the output frequency of the inverter.

[0038] In one embodiment, the sensing module includes a plurality of temperature sensors 41, which are distributed at the compressor exhaust port, inside the motor coil, and on the inverter's heat dissipation module. The pressure sensor 42 may be located at the compressor exhaust port. The current acquisition circuit 43 is located within the inverter and can acquire the inverter's output voltage, output current, and operating frequency.

[0039] Figure 4 This is a circuit diagram of the current acquisition circuit in one embodiment of the present invention; please refer to [link / reference]. Figure 4 In one embodiment of this utility model, the current acquisition circuit includes a first power amplifier U1, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, and a sixth resistor R6.

[0040] The first terminal of the first resistor R1 is connected to the first terminal of the second resistor R2, and the second terminal of the first resistor R1 is connected to the first terminal of the third resistor R3. The inverting input terminal of the first power amplifier U1 is connected to the second terminal of the second resistor R2, the first terminal of the second capacitor C2, and the first terminal of the fifth resistor R5. The non-inverting input terminal of the first power amplifier U1 is connected to the second terminal of the third resistor R3, the first terminal of the fourth resistor R4, and the first terminal of the first capacitor C1. The output terminal of the first power amplifier U1 is connected to the second terminal of the second capacitor C2, the second terminal of the fifth resistor R5, and the first terminal of the sixth resistor R6. The second terminal of the fourth resistor R4 is connected to the second terminal of the first capacitor C1 and the first terminal of the fourth capacitor C4. The second terminal of the fourth capacitor C4 is grounded. The second terminal of the sixth resistor R6 is connected to the first terminal of the third capacitor C3, and the second terminal of the third capacitor C3 is grounded.

[0041] In one embodiment of the present invention, the liquid cooling heat dissipation component includes a coolant circulation pump 13, a radiator 14, and a coolant pipe 15; the radiator 14 is connected to the coolant circulation pump 13, a motor 11, and a frequency converter 12 respectively through the coolant pipe 15; the motor 11 is provided with a first coolant flow channel, the frequency converter 12 is provided with a second coolant flow channel, and the coolant pipe 15 is connected to the first coolant flow channel and the second coolant flow channel respectively.

[0042] The screw compressor body 2 includes a housing, a female rotor, a male rotor, a transmission mechanism, bearings, and seals. The female rotor, male rotor, transmission mechanism, bearings, and seals are arranged based on the housing. The female rotor is connected to a motor and can rotate under the drive of the motor. The female rotor is connected to the male rotor through the transmission mechanism and can drive the male rotor to rotate. The structure of the screw compressor body 2 is conventional technology for those skilled in the art and will not be described in detail here.

[0043] In one embodiment of this utility model, the components of the screw air compressor body can adopt a modular design, which facilitates maintenance and upgrades; the modules are connected through standardized interfaces to ensure the scalability and compatibility of the system. At the same time, the modular design also improves the reliability and flexibility of the equipment, allowing for flexible configuration according to actual needs.

[0044] In one application scenario of this utility model, the screw air compressor of this utility model includes an integrated liquid-cooled motor frequency converter, a screw compressor structure, and an intelligent control system, and adopts a modular design.

[0045] The integrated liquid-cooled motor inverter integrates the motor and inverter into one unit, and realizes signal and power transmission through internal connection, reducing connecting parts and cables, and reducing system complexity and failure rate. At the same time, it adopts liquid cooling heat dissipation technology, which removes the heat generated by the motor and inverter through coolant circulation, achieving efficient heat dissipation, reducing equipment temperature, and improving system stability and lifespan.

[0046] The screw compressor adopts an advanced screw compressor structure, including male and female rotors, bearings, seals and other components, to achieve efficient gas compression and stable output; at the same time, the design of the screw compressor's inlet and outlet ports is optimized to improve gas flow efficiency and reduce energy consumption.

[0047] The intelligent control system integrates an intelligent control system to monitor the operating status of components such as motors, frequency converters, and screw compressors in real time, including parameters such as temperature, pressure, current, and voltage. It automatically adjusts the motor speed and the frequency converter output frequency according to the operating status to achieve energy saving, consumption reduction, and stable operation. At the same time, it has fault warning and self-protection functions, and can automatically stop the machine and issue an alarm signal when the equipment malfunctions or abnormalities occur.

[0048] The overall structure adopts a modular design, which facilitates maintenance and upgrades; the modules are connected through standardized interfaces to ensure the system's scalability and compatibility. At the same time, the modular design also improves the equipment's reliability and flexibility, allowing for flexible configuration according to actual needs.

[0049] In summary, the integrated liquid-cooled motor frequency converter driven screw air compressor proposed in this utility model has the advantages of high efficiency and energy saving, good heat dissipation, simplified system structure and easy maintenance. It can be widely used in manufacturing, construction, energy and other fields to provide efficient and reliable compressed air supply for industrial production and intelligent manufacturing.

[0050] High efficiency and energy saving: This utility model achieves high efficiency and energy saving and stable operation of the equipment by adopting an integrated liquid-cooled motor frequency converter and intelligent control system; compared with traditional screw air compressors, energy consumption is reduced by more than 20%.

[0051] Excellent heat dissipation: This invention employs liquid cooling technology, effectively reducing the temperature of the motor and inverter, thus improving system stability and lifespan. Simultaneously, it also reduces noise and pollutant emissions.

[0052] Simplified system structure: This utility model adopts an integrated design, which reduces connecting parts and cables, reduces system complexity and failure rate, and improves overall reliability.

[0053] Easy to maintain: The modular design of this invention facilitates maintenance and upgrades, reducing maintenance costs and time. Meanwhile, the standardized interfaces between modules improve the compatibility and scalability of the equipment.

[0054] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0055] The description and application of this utility model herein are illustrative and not intended to limit the scope of the utility model to the above embodiments. The effects or advantages involved in the embodiments may not be manifested in the embodiments due to various factors, and the description of effects or advantages is not intended to limit the embodiments. Variations and modifications of the embodiments disclosed herein are possible, and various substitutions and equivalents of the components in the embodiments are well known to those skilled in the art. It should be clear to those skilled in the art that this utility model can be implemented in other forms, structures, arrangements, proportions, and with other components, materials, and parts without departing from the spirit or essential characteristics of this utility model. Other variations and modifications can be made to the embodiments disclosed herein without departing from the scope and spirit of this utility model.

Claims

1. A screw air compressor driven by an integrated liquid-cooled motor frequency converter, characterized in that, The screw air compressor includes: an integrated liquid-cooled motor frequency converter, a screw compressor body, a main control circuit, and a sensing module; The integrated liquid-cooled motor inverter includes a motor, an inverter, and a liquid-cooled heat dissipation component. The motor and inverter are integrated into one unit and signal and power transmission are achieved through internal connection. The liquid-cooled heat dissipation component is connected to the motor and the inverter respectively, and the heat generated by the motor and the inverter is removed by the circulation of coolant. The sensing module is connected to the integrated liquid-cooled motor inverter and the screw compressor body respectively, and monitors the operating status data of the motor, inverter and screw compressor body in real time; the sensing module includes a temperature sensor, a pressure sensor and a current acquisition circuit. The temperature sensor is used to collect the temperature of the set area, the pressure sensor is used to collect the pressure of the set area, and the current acquisition circuit is used to collect the output voltage, output current, and operating frequency of the frequency converter. The output terminal of the sensing module is connected to the output terminal of the main control circuit, and can send the sensed data to the main control circuit; The output terminal of the main control circuit is connected to the input terminal of the integrated liquid-cooled motor inverter and the input terminal of the screw compressor body, respectively, and can send control signals to the integrated liquid-cooled motor inverter and the screw compressor body to control their operation.

2. The screw air compressor according to claim 1, characterized in that: The liquid cooling heat dissipation component includes a coolant circulation pump, a radiator, and coolant pipes; the radiator is connected to the coolant circulation pump, a motor, and a frequency converter via coolant pipes. The motor is provided with a first coolant flow channel, the frequency converter is provided with a second coolant flow channel, and the coolant pipes are respectively connected to the first coolant flow channel and the second coolant flow channel.

3. The screw air compressor according to claim 1, characterized in that: The screw compressor body includes a housing, a female rotor, a male rotor, a transmission mechanism, bearings, and seals, wherein the female rotor, male rotor, transmission mechanism, bearings, and seals are arranged based on the housing; The female rotor is connected to a motor and can rotate under the drive of the motor; the female rotor is connected to the male rotor through a transmission mechanism and can drive the male rotor to rotate.

4. The screw air compressor according to claim 1, characterized in that: The current acquisition circuit includes a first power amplifier U1, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, and a sixth resistor R6. The first end of the first resistor R1 is connected to the first end of the second resistor R2, and the second end of the first resistor R1 is connected to the first end of the third resistor R3; the inverting input terminal of the first power amplifier U1 is connected to the second end of the second resistor R2, the first end of the second capacitor C2, and the first end of the fifth resistor R5, respectively. The non-inverting input terminal of the first power amplifier U1 is connected to the second terminal of the third resistor R3, the first terminal of the fourth resistor R4, and the first terminal of the first capacitor C1, respectively; the output terminal of the first power amplifier U1 is connected to the second terminal of the second capacitor C2, the second terminal of the fifth resistor R5, and the first terminal of the sixth resistor R6, respectively. The second end of the fourth resistor R4 is connected to the second end of the first capacitor C1 and the first end of the fourth capacitor C4 respectively; the second end of the fourth capacitor C4 is grounded; the second end of the sixth resistor R6 is connected to the first end of the third capacitor C3, and the second end of the third capacitor C3 is grounded.

5. The screw air compressor according to claim 1, characterized in that: The main control circuit is further connected to an actuator, which adjusts the speed of the motor and the output frequency of the inverter.

6. The screw air compressor according to claim 1, characterized in that: The sensing module includes several temperature sensors, which are distributed in the compressor exhaust port, inside the motor coil, and in the inverter's heat dissipation module.

7. The screw air compressor according to claim 1, characterized in that: The pressure sensor is located at the exhaust port of the pressure unit.

8. The screw air compressor according to claim 1, characterized in that: The current acquisition circuit is located inside the frequency converter.

9. The screw air compressor according to claim 1, characterized in that: The screw air compressor adopts a modular design for each component, and the modules are connected through standardized interfaces.

Images