CN205533235U - Air compressor - Google Patents

Abstract

The utility model provides an air compressor, including a motor system, a main engine, an oil-gas separator, an oil-gas cooler system, a flow sensor and a current transformer; wherein, the motor system drives the main engine; the main engine communicates with the oil-gas separator; The separator communicates with the oil-gas cooler system; the oil-gas cooler communicates with the air outlet; the current transformer detects the current signal of the motor system; the flow sensor detects the gas flow separated by the oil-gas separator. Its advantage is that it integrates the flow signal and current signal provided by the flow sensor and current transformer, the energy-saving effect is clear at a glance, and the user can always check the power consumption and energy efficiency level of the air compressor.

Description

air compressor

technical field

The utility model relates to an air compressor.

Background technique

With the progress of society and the improvement of energy-saving awareness, the air compressor industry is no longer the era that only needs to produce gas, but ushered in the trend of energy-saving. How to manufacture extreme energy-saving products and let users directly see the energy-saving Effects became our top priority.

Energy-saving products say how much electricity can be saved, but due to the chaos in the industry, many air compressors have false labels and other phenomena, which destroys the overall image of the air compressor industry and causes air compressor users to be concerned about the energy saving of air compressor products. As a result, mistrust has been generated, which has seriously affected the promotion and use of energy-saving products.

The energy-saving air compressors on the market now include: permanent magnet machines, frequency conversion machines, low-pressure machines, two-stage compression air compressors, etc. All of these air compressors can save energy, but none of them can achieve extreme energy saving. Machines still have energy-saving space can be used.

Utility model content

The purpose of the utility model is to provide an air compressor that can display the energy-saving effect in real time, so as to overcome the above-mentioned defects in the prior art.

The utility model provides an air compressor, including a motor system, a main engine, an oil-gas separator, an oil-gas cooler system, a flow sensor and a current transformer; wherein, the motor system drives the main engine; the main engine communicates with the oil-gas separator; The separator communicates with the oil-gas cooler system; the oil-gas cooler communicates with the air outlet; the current transformer detects the current signal of the motor system; the flow sensor detects the gas flow separated by the oil-gas separator.

Further, the utility model provides an air compressor, which can also have the following features: wherein, the oil-air cooler system includes an oil-air cooler and a fan device; the fan device includes a fan frequency conversion controller and a fan; the oil-gas separator and the oil-gas cooler Connected; the fan frequency conversion controller controls the fan to provide cooling wind for the oil-air cooler.

Further, the utility model provides an air compressor, which may also have the following features: it also includes a temperature sensor, which is installed at the outlet of the main engine; the fan frequency conversion controller adjusts the input frequency of the fan through the temperature provided by the temperature sensor.

Further, the utility model provides an air compressor, which can also have the following features: the motor system includes a permanent magnet synchronous motor and a permanent magnet synchronous frequency conversion controller; the permanent magnet synchronous motor is connected to the host through a coupling; the permanent magnet synchronous frequency conversion The controller controls the permanent magnet synchronous motor to drive the main engine; the current transformer is connected with the permanent magnet synchronous frequency converter.

Further, the utility model provides an air compressor, which can also have the following features: it also includes a pressure sensor, which is arranged at the outlet of the air compressor; the permanent magnet synchronous frequency converter adjusts the pressure of the permanent magnet synchronous motor through the pressure provided by the pressure sensor. Frequency of.

Further, the utility model provides an air compressor, which can also have the following features: it also includes a pre-filter device, an air filter and an intake valve; after the air passes through the filter device, the air filter and the intake valve in sequence, into the host.

Further, the utility model provides an air compressor, which may also have the following feature: the host is a dual-compression screw host.

Further, the utility model provides an air compressor, which can also have such a feature: it also includes a display to display the current signal and the gas flow.

Further, the utility model provides an air compressor, which may also have such a feature: it also includes a calculation module, which calculates the specific power according to the current signal and the gas flow.

Furthermore, the utility model provides an air compressor, which may also have the following feature: the motor system is connected to the Internet of Things.

Function and effect

1. The introduction of permanent magnet technology: This product uses a permanent magnet servo motor, and its efficiency is 3-8% higher than that of asynchronous motors.

2. Application of two-stage compression technology: Practice has proved that two-stage compression can increase efficiency by 10-15% by reducing the pressure ratio.

3. The introduction of double frequency conversion technology:

1. The use of ordinary air compressors fluctuates within a pressure range, resulting in constant changes in the load of the compressor, while the frequency conversion technology of the main motor can make the air compressor directly output the minimum pressure gas you need, and the pressure is constant and inconvenient, which greatly saves out of power;

2. Fan frequency conversion technology: the temperature control valve can output constant temperature or change the temperature in a small range, but the fan will output 100%, resulting in waste of fan energy. The start and stop control of the fan will increase the failure rate of the fan, and the power consumption of the start and stop will increase greatly. Large air temperature fluctuations will cause unfavorable factors to the whole machine, and this product adopts fan frequency conversion technology to adjust the output power of the fan according to the temperature, minimize power consumption and achieve constant temperature output.

4. Minimize pressure drop design of pipelines and containers

1. Design of large-capacity oil and gas barrel: in the case of satisfying the centrifugal flow rate, increase the capacity of the oil and gas barrel, increase the area of the separator and control the pressure drop here within 0.1bar;

2. The pipelines are all made of large-diameter stainless steel smooth tubes, which greatly reduces the pressure drop of the pipelines;

3. Increase the heat exchange area of the cooler, reduce the pressure drop of the cooler (the pressure drop of the compressed air and the static pressure of the cooler), and increase the specific power of the whole machine.

5. Energy-saving effect

1. A flow meter and flow signal sensing equipment are added to the exhaust side of the compressor;

2. Increase the power statistics equipment on the input side of the compressor;

3. The air compressor flow statistics display is added to the panel display, the electricity usage statistics of the whole machine, and the input specific power statistics of the whole machine, so that users can see the quality of the product at a glance;

Sixth, the introduction of Internet of Things technology,

Whether it is energy-saving effect or the working condition of the equipment, the Internet of Things technology can be controlled by you anytime and anywhere.

Description of drawings

Figure 1 is a schematic diagram of the structure of the air compressor.

Figure 2 is a circuit diagram of the specific power detection circuit of the air compressor.

detailed description

Below in conjunction with accompanying drawing and specific embodiment the utility model is described further.

Figure 1 is a schematic diagram of the structure of the air compressor.

As shown in Figure 1, the air compressor includes: motor system 10, pre-filter device 20, air filter 30, intake valve 40, host 50, temperature sensor 60, oil-gas separator 70, safety valve 80, flow sensor Detector 90, pressure maintenance valve 100, oil-air cooler system 110, pressure sensor 120, current transformer 130, oil return check valve 140, check valve 150, discharge solenoid valve 160, ball valve 170 and oil filter 180 .

The motor system includes a permanent magnet synchronous motor 11 and a permanent magnet synchronous frequency converter 12 . The permanent magnet synchronous motor 11 is connected with the host machine 50 through a coupling 51 . The permanent magnet synchronous frequency conversion controller 11 controls the permanent magnet synchronous motor 11 to drive the host 50 .

The main engine 50 is a two-machine compression screw main engine. There is a pre-filter 20 , an air filter 30 and an intake valve 40 before the suction inlet of the twin-compression screw main engine 50 . The air passes through the pre-filter 20 , the air filter 30 , and the intake valve 40 sequentially and then enters the dual-compression screw host 50 .

The oil-gas separator 70 includes: an air-oil barrel 71 , a drain 72 and an oil sight glass 73 . The main engine 50 is passed into the air-oil drum 71 through a pipeline. The upper end of the gas oil drum 71 has an oil return pipeline and communicates with the main engine 50 . The oil return check valve 140 is arranged on the oil return pipeline. The bottom of the air-oil barrel 71 leads into the oil-air cooler 111 of the oil-air cooler system 110 through the oil pipeline. Drainage felling 72 and oil sight glass 73 are arranged on the lower end of air-oil barrel 71. The gas and oil barrel 71 adopts the design of a large-capacity oil and gas cylinder, and all the oil pipelines are made of large-diameter stainless steel smooth pipes, which greatly reduces the pressure drop of the pipeline.

The oil-gas separator 70 communicates with the intake valve through a control pipeline.

The oil-air separator 70 communicates with the oil-air cooler 111 of the oil-air cooler system 110 through an air pipeline, and sends the separated compressed air into the oil-air cooler 111 . On the air pipeline connecting the oil-air separator 70 and the oil-air cooler 111 , a safety valve 180 , a flow sensor 90 and a pressure maintaining valve 100 are arranged in sequence. The flow sensor detects the gas flow separated by the oil-gas separator.

The oil-air cooler system 110 includes: an oil-air cooler 111 and a fan device 112 . The fan device includes a fan frequency conversion controller 112-1 and a fan 112-2. The fan frequency conversion controller 112-1 controls the fan 112-2 to provide the cooling air of the oil-air cooler 111.

The oil-air cooler 111 communicates with the air outlet of the air compressor through pipelines. A ball valve 170 is arranged on the pipeline of the air outlet. The oil-air cooler 111 also communicates with the main engine 50 through an oil pipeline. The oil filter 180 is arranged on the pipeline communicating between the oil-air cooler 111 and the main engine 50 for filtering.

The temperature sensor 60 is arranged at the outlet of the host. The fan frequency conversion controller 112 - 1 adjusts the input frequency of the fan 112 - 2 through the temperature provided by the temperature sensor 60 .

The pressure sensor 120 is arranged on the pipeline between the oil-air cooler 111 and the ball valve 170 . The permanent magnet synchronous frequency converter 12 adjusts the frequency of the permanent magnet synchronous motor 11 through the pressure provided by the pressure sensor 120 .

The current transformer 130 is connected with the permanent magnet synchronous frequency converter 12 to detect the current signal of the motor system.

The air compressor also includes a display to display the current signal and gas flow.

The air compressor also includes a computing module and a display. The calculation module calculates the specific power according to the current signal and the gas flow. The display shows the current signal, gas flow progress and calculated specific power.

The motor system is connected to the Internet of Things, which can remotely control the operation of the air compressor, and can also remotely monitor the data, especially the specific power, to obtain information on the degree of energy saving.

The working process of the air compressor:

The permanent magnet high-efficiency synchronous motor is used to drive the two-stage compression screw main engine. After the two-stage compression screw main engine is running, the air passes through the pre-filter, air filter, and intake valve (the switch of the intake valve and the air pressure are controlled by the discharge solenoid valve. The discharge of the internal pressure of the compressor system after the machine stops) is sucked into the two-stage compression screw host, and a small amount of lubricating oil will be sucked in at the same time (here the lubricating oil is drawn from the oil and gas by the pressure difference between the oil-gas barrel and the two-stage compression screw The barrel is taken out, and enters the suction side of the two-stage compression screw host through the oil-air cooler and oil filter), the oil-air mixture is compressed to the required pressure through the screw host, and the pressurized oil-air mixture enters the oil-air barrel to separate 99% Oil, and then 99.99% of the oil is separated through the oil-air separator (the oil separated by the oil-air separator here will return to the screw host through the pressure difference), and then the compressed air passes through the pressure maintenance valve, flow sensor, oil-air cooler ( The cooler uses the air generated by the rotation of the fan for heat exchange and cooling) and then enters the use end.

Compressed air constant pressure output: The permanent magnet synchronous frequency converter adjusts the frequency of the permanent magnet motor through the pressure signal provided by the pressure sensor. The device will automatically keep the gas production volume consistent with the compressed air consumption (under the condition of constant use pressure) to achieve constant pressure output.

Compressed air constant temperature output: The fan frequency converter adjusts the input frequency of the fan through the temperature signal provided by the temperature sensor, so that the cooling air volume generated by the fan can be adjusted, so that the heat exchange of the cooler can just get the temperature we set, so as to achieve constant temperature output.

Specific power display: The inverter collects the flow signal and current signal provided by the flow sensor and current transformer, and displays the specific power on the LCD panel through internal calculation, so that the user can always guide the performance and energy saving effect of this equipment.

Internet of things technology: the inverter collects all the operating information of the equipment and transmits it to the Internet of things transmitting equipment through the 485 port, so that the user can remotely monitor the operation status and energy saving effect of the equipment.

Other conventional protections and controls: motor overcurrent protection, motor overtemperature protection, overpressure protection, exhaust temperature protection, automatic switch on and off, etc. This equipment is equipped with conventional protections.

Function and effect of embodiment

Application of permanent magnet technology: permanent magnet synchronous motor has a power factor close to 1, minimizes useless work, lower current at the same power, and requires lower configuration. The maintenance of the permanent magnet synchronous motor is simpler and more convenient.

The use of two-stage compression technology: the original single-stage compression, assuming a working pressure of 0.8MPa, a compressed air pressure ratio of 9, and a temperature rise of more than 60°, the gap between the screws is large and the volumetric efficiency is low, while the two-stage compression is divided into two The compression pressure ratio is evenly divided, all around 3, the temperature rise is 30-40°, the pressure ratio is small, the rotor clearance is small, the leakage is small, it is closer to isothermal compression, and the volumetric efficiency is higher than that of ordinary single-stage screw and double-stage compression screw. Increase by 10-15%.

Permanent magnet frequency conversion technology: permanent magnet motors have a great advantage—one-step motors decrease in efficiency with the use of power, while permanent magnet motors have little change in efficiency. Therefore, through frequency converters, the permanent magnets can be adjusted. Synchronize the input power and speed (this process is basically inconvenient for efficiency), the frequency conversion system will provide as much pressure and air volume as the air compressor needs, and there will be no waste.

Fan frequency conversion constant temperature system: The exhaust temperature of the air compressor has relatively strict requirements. If it is too high, the life of the oil product will be reduced, and the efficiency of the compressor will be reduced. If it is too low, condensed water will be generated, which will affect the oil product. On the market, fans are basically used to start and stop or temperature control valves. The start and stop of fans will cause large fluctuations in exhaust temperature. Frequent start and stop of fans will consume more power and reduce the life of fans. A lot of energy is wasted and the cooler is easy to block, but we use frequency conversion of the fan to adjust the air volume of the fan according to the exhaust temperature signal, so that the exhaust temperature is always stable at the optimal temperature, without wasting a little energy, and the life of the fan is greatly extended.

Specific power display system: The energy-efficient air compressors on the market are all advertised as being energy-efficient and how much electricity they can save, but how much electricity can be saved in actual operation cannot be verified or cannot achieve the expected power-saving effect, causing users to distrust the air compressor. And the specific power display system we added - directly displays data such as power consumption per unit time, total power consumption, exhaust volume per unit time, total gas volume, input specific power of the air compressor on the LCD panel, and the energy-saving effect is clear at a glance. Users can always check the power consumption and energy efficiency level of the air compressor.

Internet of things technology: the operating status of the air compressor, the use of the air compressor, maintenance status, real-time specific power, etc. need to enter the air compressor room to check, and the Internet of things technology allows you to check everything about the air compressor anytime, anywhere Data, users are more convenient, more assured, and more worry-free.

Claims (10)

1. An air compressor, characterized in that: Including, motor system, main engine, oil-air separator, oil-air cooler system, flow sensor and current transformer; Wherein, the motor system drives the host; The host communicates with the oil-gas separator; The oil-gas separator communicates with the oil-gas cooler system; The oil-gas cooler communicates with the air outlet; The current transformer detects the current signal of the motor system; The flow sensor detects the gas flow separated by the oil-gas separator. 2. The air compressor according to claim 1, characterized in that: Wherein, the oil-air cooler system includes an oil-air cooler and a fan device; The fan device includes a fan frequency conversion controller and a fan; The oil-gas separator communicates with the oil-gas cooler; The fan frequency conversion controller controls the fan to provide cooling wind for the oil-air cooler. 3. The air compressor according to claim 2, characterized in that: It also includes a temperature sensor, which is arranged at the outlet of the host; The frequency conversion controller of the fan adjusts the input frequency of the fan according to the temperature provided by the temperature sensor. 4. The air compressor according to claim 1, characterized in that: Wherein, the motor system includes a permanent magnet synchronous motor and a permanent magnet synchronous frequency conversion controller; The permanent magnet synchronous motor is connected with the host through a coupling; The permanent magnet synchronous frequency conversion controller controls the permanent magnet synchronous motor to drive the host; The current transformer is connected with the permanent magnet synchronous frequency converter. 5. The air compressor according to claim 1, characterized in that: It also includes a pressure sensor, which is arranged at the outlet of the energy-saving air compressor; The permanent magnet synchronous frequency converter adjusts the frequency of the permanent magnet synchronous motor through the pressure provided by the pressure sensor. 6. The air compressor according to claim 1, characterized in that: Also includes pre-filter, air filter and intake valve; The air enters the main engine after passing through the filtering device, the air filter and the intake valve in sequence. 7. The air compressor according to claim 1, characterized in that: Wherein, the main engine is a two-machine compression screw main engine. 8. The air compressor according to claim 1, characterized in that: A display is also included to display the current signal and the gas flow. 9. The air compressor according to claim 1, characterized in that: It also includes a calculation module, which calculates specific power according to the current signal and the gas flow. 10. The air compressor according to claim 1, characterized in that: Wherein, the motor system is connected to the Internet of Things.