CN201802600U - Air compressor - Google Patents
Air compressor Download PDFInfo
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- CN201802600U CN201802600U CN2010201166001U CN201020116600U CN201802600U CN 201802600 U CN201802600 U CN 201802600U CN 2010201166001 U CN2010201166001 U CN 2010201166001U CN 201020116600 U CN201020116600 U CN 201020116600U CN 201802600 U CN201802600 U CN 201802600U
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Abstract
The utility model discloses an air compressor which has the advantages that the pressure setting is convenient and reliable and energy consumption can be greatly reduced. The control device of the air compressor is connected with the output of a pressure sensor and used for controlling the opening or the closing of an air intake valve-controlled solenoid valve and the opening or the closing of a bypass vent valve according to detection signals of the pressure sensor; and the control device is connected with a first contactor and a second contactor respectively so as to control the running mode of a motor and further control the running or the shutdown of the motor according to pressure droop rate Delta p/ Delta T. More accurate setting and controlling to air pressure can be achieved through the participation of a computer-control system in controlling and the coordination of a corresponding actuating mechanism; and energy consumption of the air compressor is greatly reduced through the setting of the control device, the coordination of the running and shutdown of the motor, as well as the coordination of an air intake valve and the bypass vent valve.
Description
Technical field
The utility model relates to a kind of air compressor.
Background technique
Present widely used large-scale compressor comprises motor, motor-driven compressed air generator, and gas holder etc., its basic workflow is as follows:
After air filters through filter, suction valve by the compressed air generator front end enters compressed air generator, during bent axle in the motor rotation compressed air generator main body, by the servo piston to-and-fro motion in cylinder of this bent axle, the low-pressure air that enters like this in the cylinder will become high-pressure air.High-pressure air enters in the gas holder through air pipe.
Compressed air generator also has the rotor of two interlocks of motor driving to rotate the compressed-air actuated screw-rod air compressor of generation in the opposite direction except piston type air compressor above-mentioned.
When starting shooting first, require manually suction valve to be adjusted into closed condition, be beneficial to the reduction electric current starting of motor, after the motor operation is normal, manually suction valve is adjusted into the air inlet state.Simultaneously, in order to reduce starting current, adopt the star fashion reduced voltage starting during electric motor starting, after motor was finished starting through certain time-delay, motor transferred the triangle mode again to and moves.
The suction valve of existing air compressor has automatic control function, promptly by regulating the pressure regulator on the suction valve, high value and low value that can setting air pressure, when the air pressure in the gas holder rises to the setting high pressure action numerical value of suction valve, pressure regulator is open-minded, enter the piston of suction valve through air pipe from the pressurized air of gas holder introducing, pressurized air promotes to move on the piston, close suction valve, compressed air generator is converted to the unloading operation by load operation, also can be called no-load running, motor at this moment still moves according to the triangle mode, and excess current does not reduce to some extent.
When the compressed air pressure in the gas holder drops to the setting low pressure action numerical value of pressure regulator of suction valve, pressure regulator cuts out, there is not pressurized air to promote the piston of suction valve, the piston of suction valve is under the effect of spring force, piston moves down, suction valve is open-minded again, and compressed air generator transfers load operation to by the unloading running state changes state, and motor working current strengthens.
At the air compressor run duration, the air pressure in the gas holder is moved at the high pressure that pressure regulator is set and is ceaselessly circulated between numerical value and the low pressure action numerical value, and motor moves according to the triangle mode always, even also do not shut down during the zero load.Go round and begin again circular flow like this.
There is following deficiency in existing air compressor:
The pressure regulator of suction valve is a mechanical adjustment, be that the adjusting screw rod preloading spring is regulated, on the compressed air generator of high speed operation and vibrations, the adjusting numerical value of pressure regulator is difficult for fixing, often change, brought great difficulty and potential safety hazard for the normal safe operation of air compressor.And the pressure value of pressure regulator is regulated also very trouble, and the precision of adjusting is not high yet.
The power of motor of large-scale compressor is bigger, and when compressed air generator unloading operation (no-load running), motor still moves according to the triangle mode, though electric current reduces to some extent, its absolute value is still considerable, and the power wastage numerical value that accumulates over a long period is huge.Such as: the occasion that has accounts for 1/3rd to 1/2nd of the whole compressor operating time idle time in whole workflow, the power of compressor is very big in addition, so waste of energy is considerable.
The model utility content
In order to overcome the deficiencies in the prior art, the purpose of this utility model provides a kind of air compressor, and the pressure of this air compressor is provided with convenience, reliable, and this air compressor can greatly reduce the air compressor operation energy consumption.
The technical solution adopted in the utility model is:
A kind of air compressor comprises:
Gas holder, the employed pressurized air of described gas holder storage pneumatic equipment;
Compressed air generator, outside air enters compressed air generator by air filter, and described compressed air generator pressurized air also transmits pressurized air and be stored in the described gas holder;
Motor, described motor driving compressed air generator produces pressurized air;
Suction valve is arranged between air filter and the compressed air generator, and described suction valve is when opening state, and from then on air enters compressed air generator;
The suction valve control electromagnetic valve is connected between gas holder and the suction valve by air pipe, and when this suction valve control electromagnetic valve was opened, suction valve can cut out by outside air, otherwise suction valve is open-minded;
Pressure transducer is arranged on the gas holder, can detect the compressed air pressure in the gas holder;
Also comprise: first contactor, connect motor windings, the control motor moves with triangle pattern; Second contactor connects motor windings, and the control motor moves with star schema;
It is characterized in that:
Described air compressor also comprises a control gear, and described control gear is connected with the output of pressure transducer, and according to the testing signal of pressure transducer, the opening or closing of control suction valve control electromagnetic valve; Described control gear is connected with first contactor, second contactor respectively, and passes through the adhesive or the release of control first contactor, second contactor, and then the operating mode or the shutdown of control motor.
Described control gear comprises the computer unit that is connected by Internal Bus by central processing unit (CPU), random access memory, ROM (read-only memory), interface circuit, and the display unit that is connected with computer unit, input unit, performance element; By input unit parameter is set, transmit signal by interface circuit, computer unit compares the external detection signal of transmission and the parameter of setting, judge, and send a signal to corresponding performance element by interface circuit according to judged result, corresponding performance element starts or stops associated external devices, makes it to open or close.
Further: a soft starter device is set between power supply and motor, and the output of control gear connects the start switch and the halt switch of soft starter device, with control electric motor starting and shutdown.
When the gas holder compressed air pressure rose to setting high value, control gear control suction valve control electromagnetic valve was open-minded, and suction valve cuts out, and first contactor discharges, the second contactor adhesive, and motor moves with star schema; When the gas holder compressed air pressure dropped to the setting low value by the high value of setting, control gear was controlled second contactor and is discharged, the first contactor adhesive, and the suction valve control electromagnetic valve is closed, and suction valve is open-minded, and motor moves with triangle pattern.
Further:
When the gas holder compressed air pressure rose to setting high value, control gear control suction valve control electromagnetic valve was open-minded, and suction valve cuts out, and first contactor discharges, the second contactor adhesive, and motor moves with star schema; Control gear is judged gas holder compressed air pressure rate of descent Δ p/ Δ T, if pressure rate of descent Δ p/ Δ T during more than or equal to some setting values, control gear is controlled second contactor and continued adhesive, and motor moves with star schema continuously; When if pressure rate of descent Δ p/ Δ T is less than or equal to some setting values, first contactor controlled by control gear and second contactor discharges, and the motor outage is shut down; When the gas holder compressed air pressure dropped to the setting low value by the high value of setting, motor was reset.
Further: for the air compressor that soft starter device is set,
When the gas holder compressed air pressure rose to setting high value, control gear control suction valve control electromagnetic valve was open-minded, and suction valve cuts out, and first contactor discharges, the second contactor adhesive, and motor moves with star schema; Control gear is judged gas holder compressed air pressure rate of descent Δ p/ Δ T, if pressure rate of descent Δ p/ Δ T during more than or equal to some setting values, control gear is controlled second contactor and continued adhesive, and motor continues to move with star schema; When if pressure rate of descent Δ p/ Δ T is less than or equal to some setting values, the stopping signal of control gear output soft starter device, motor is shut down; When the gas holder compressed air pressure dropped to the setting low value by the high value of setting, motor was reset.
Further: between compressed air generator and gas holder, set gradually at least one bypass outlet valve and an one-way valve, the bypass outlet valve is under the control of control gear, certain constantly open-minded, make compressed air generator keep communicating of a period of time with outside atmosphere.
Further: the output of control gear is connected to the bypass outlet valve, control gear is according to the testing signal of pressure transducer, it is open-minded when the testing signal of pressure transducer rises to setting high value to control described bypass outlet valve, closes when the compressed air generator proper functioning.
Further: the output of control gear is connected to the bypass outlet valve, control gear is according to the testing signal of pressure transducer, it is open-minded when the testing signal of pressure transducer rises to setting high value to control described bypass outlet valve, closes when the compressed air generator proper functioning; And, the output of control gear is connected to the suction valve control electromagnetic valve, control gear is according to the testing signal of pressure transducer, when the testing signal of pressure transducer rises to setting high value, it is open-minded to control described suction valve control electromagnetic valve, and suction valve cuts out, when the compressed air generator proper functioning, control suction valve control electromagnetic valve is closed, and suction valve is open-minded.
Further: the output of control gear is connected to the bypass outlet valve, control gear is according to the testing signal of pressure transducer, it is open-minded when the testing signal of pressure transducer rises to setting high value to control described bypass outlet valve, the output of closing when the compressed air generator proper functioning with control gear is connected to the suction valve control electromagnetic valve, control gear is according to the testing signal of pressure transducer, when the testing signal of pressure transducer rises to setting high value, it is open-minded to control described suction valve control electromagnetic valve, suction valve cuts out, when the compressed air generator proper functioning, control suction valve control electromagnetic valve is closed, and suction valve is open-minded; And, the output of control gear is connected to the bypass outlet valve, it is open-minded when the driven by motor compressed air generator starts to control described bypass outlet valve, the output of closing when the compressed air generator proper functioning with control gear is connected to the suction valve control electromagnetic valve, and when the driven by motor compressed air generator started, control suction valve control electromagnetic valve was open-minded, suction valve cuts out, when the compressed air generator proper functioning, control suction valve control electromagnetic valve is closed, and suction valve is open-minded.
The beneficial effects of the utility model: the participation control by computer controlled system, cooperate corresponding actuator, can realize being provided with more accurately and controlling of air pressure, to move more reliably, the operation of whole system is more flexible.Can adjust Operational Limits in real time according to the different requirements at scene.
Air compressor when starting, suction valve close open-minded with the bypass outlet valve, can guarantee that air compressor starts under extremely light load.After air pressure rises to and sets high value, suction valve close open-minded with the bypass outlet valve, pressurized gas in the bleed off compressed air generator, making compressed air generator inner is normal pressure, and motor switches to the star operating mode by the triangle operating mode, motor is worked under star fashion, because voltage is lower, running current is little, simultaneously the power factor height, power utilization rate height, the air compressor energy consumption significantly reduces.
And, after air pressure rises to the high value of setting, judge gas holder compressed air pressure rate of descent Δ p/ Δ T by control gear, under the less situation of gas consumption, motor is shut down, and this has reduced a large amount of energy consumptions for the operation of air compressor again.
From the above mentioned, the conversion by the motor operating mode, motor operation and shut down alternately, and suction valve and bypass exhaust valve closure and the combination of opening have reduced the operation energy consumption of air compressor, realize maximum energy-saving control.
Description of drawings
Accompanying drawing 2 is for being used to explain motor operating mode, running current and suction valve working state schematic representation;
Accompanying drawing 3 is used to explain motor operating mode, running current and suction valve working state schematic representation for another kind;
Accompanying drawing 4 is second embodiment's of the air compressor that is associated with the utility model block diagram;
Accompanying drawing 5 is the 3rd embodiment's of the air compressor that is associated with the utility model block diagram;
Accompanying drawing 6 is for being used to explain motor operating mode, running current and suction valve, bypass outlet valve working state schematic representation;
Accompanying drawing 7 is used to explain motor operating mode, running current and suction valve, bypass outlet valve working state schematic representation for another kind.Among the figure:
1. motor, 2. compressed air generator, 3. one-way valve, 4. gas holder, 5. pressure transducer, 6. suction valve control electromagnetic valve, 7. air filter, 8. soft starter device, 9. suction valve, 10. control gear, 11. air pipe, 12. bypass outlet valves, KM1. first contactor, KM2. second contactor.
Embodiment
Below in conjunction with accompanying drawing the utility model is elaborated.
Shown in Figure 1, be an embodiment's of the air compressor that is associated with the utility model block diagram.
A, B, C three phase mains insert motor 1 via switch ZK, three windings of motor 1 are connected with the second contactor KM2 with the first contactor KM1 respectively, the adhesive of the first contactor KM1 is in order to be connected to become the triangle operating mode with motor 1, and the adhesive of the second contactor KM2 is in order to be connected to become the star operating mode with motor 1.Motor 1 is with any mode operation, by control gear 10 according to the starting of motor 1 whether, factor decisions such as the testing signal of the pressure transducer 5 that is provided with on the gas holder 4 and air pressure rate of descent Δ p/ Δ T.
Pressurized air enters in the gas holder 4 through air pipe 11, and the testing signal of gas holder 4 upward pressure sensors 5 is sent to control gear 10.Air pipe 11 connects gas holder 4 and is connected to suction valve 9 by suction valve control electromagnetic valve 6, and the control signal of suction valve control electromagnetic valve 6 is connected to control gear 10.
Compressed air generator also has the rotor of two interlocks of motor driving to rotate the compressed-air actuated screw-rod air compressor of generation in the opposite direction except piston type air compressor above-mentioned.
Described control gear 10 comprises the computer unit 101 that is connected by Internal Bus (being abbreviated as BUS) by central processing unit (CPU) (being abbreviated as CPU), random access memory (being abbreviated as RAM), ROM (read-only memory) (writing a Chinese character in simplified form ROM), interface circuit (below be abbreviated as I/F), the control program of air compressor is kept among the ROM, and RAM is used for interim the preservation and carries out needed data of this program and result of calculation.CPU is based on being loaded into the control program among the ROM and being stored in the operation that data among the RAM are controlled air compressor.
The command signal of computer unit 101 outputs sends display unit 108 to by I/F1018, input unit 109 is sent to computer unit 101 by I/F1019 with the parameter that is provided with, because the digitizing that is set to of parameter is directly imported, therefore, the parameter setting is extremely convenient, accurate, simultaneously, input unit 109 can not be subjected to the influence of air compressor vibrations etc., and the preservation of parameter is reliable.Performance element 102,103,104 is used for computer unit 101 is carried out respective handling through the command signal of I/F1012, I/F1013, I/F1014 output, and generation can the corresponding signal that drives suction valve control electromagnetic valve 6, the first contactor KM1, the second contactor KM2.
Working procedure with air compressor describes in detail below:
A, B, C three phase mains insert motor 1 via switch ZK, get the electric corresponding initialization of carrying out with time-control apparatus 10.Finish the work that various Control Parameter are set by input unit 109, as high value P H of air pressure and pressure low value P L etc. are set.
Pressure transducer 5 testing signals are sent to computer unit 101 through I/F1011, when motor 1 drives compressed air generator 2 first starts, pressure transducer 5 testing signals are lower than sets high value, the command signal of computer unit 101 output is sent to performance element 102 and is handled by performance element 102 through I/F1012, output suction valve control electromagnetic valve 6 is opened signal, pressurized gas in the gas holder 4 is by air pipe 11 and the suction valve control electromagnetic valve 6 piston intake mouth to suction valve 9, promote piston action, suction valve 9 cuts out.Simultaneously, the command signal of computer unit 101 output is sent to performance element 103 and is handled by performance element 103 through I/F1013, export the first contactor KM1 release signal, the command signal of computer unit 101 outputs is sent to performance element 104 and by performance element 104 processing, exports the second contactor KM1 adhesive signal through I/F1014.Like this, compressed air generator 2 is starting under no load under the star schema of motor 1 just, and at this moment the running current of motor 1 is less.
Drive the starting time of a setting of compressed air generator 2 operations when motor 1 after, such as: 15 seconds, the command signal of computer unit 101 output is sent to performance element 104 and is handled by performance element 104 through I/F1014, export the second contactor KM1 release signal, computer unit 101 is handled through I/F1013 and by performance element 103, exports the first contactor KM1 adhesive signal.And, computer unit 101 is handled through I/F1012 and by performance element 102, output suction valve control electromagnetic valve 6 shutdown signals, pressurized gas in the gas holder 4 can not be by air pipe 11 and the suction valve control electromagnetic valve 6 piston intake mouth to suction valve 9, piston is under the effect of spring force, and suction valve 9 is open-minded.Like this, compressed air generator 2 just carries out compressed-air actuated work under the triangle pattern of motor 1, and at this moment the running current of motor 1 strengthens.Air through overcompression enters in the gas holder 4 through air pipe 11.
The testing signal of pressure transducer 5 outputs is by being sent to computer unit 101 for I/F1011.When the testing signal of pressure transducer 5 outputs rises to the high value PH of setting pressure, be sent to performance element 102, performance element 103, performance element 104 from the command signal of computer unit 101 outputs respectively by I/F1012, I/F1013, I/F1014, processing via above-mentioned performance element, control respectively that suction valve control electromagnetic valve 6 is opened, the first contactor KM1 discharges, the second contactor KM2 adhesive, suction valve 9 cuts out.Like this, motor 1 drives compressed air generator 2 with star schema unloading operation.Therefore, the energy consumption of motor 1 reduces greatly.
When pressure rose to the high value P H of setting pressure, motor 1 was converted to the star operating mode by the triangle operating mode, and the running current of motor 1 reduces, and efficient improves, and obvious energy-saving effect is arranged.
Because leakage of air and compressed-air actuated use, compressed air pressure descends gradually in the gas holder 4, when the testing signal of pressure transducer 5 when setting low value PL, the control gear 10 controls second contactor KM2 discharges, the first contactor KM1 adhesive, and suction valve control electromagnetic valve 6 is closed, suction valve 9 is open-minded, motor 1 carries out compressed-air actuated work under triangle pattern, compressed air pressure improves constantly in the gas holder 4, and the running current of motor 1 increases simultaneously.
More than, after motor 1 starting, between pressure high value PH and pressure low value PL, the course of action of pressure rising, pressure decline and corresponding motor 1, the first contactor KM1, the second contactor KM2, suction valve control electromagnetic valve 6, suction valve 9 so goes round and begins again.Below can distincter this process from the detailed description of Fig. 2.
In Fig. 2, transverse axis express time t, the longitudinal axis is represented the running current of gas holder compressed air pressure P and motor.
T21: 1 star-delta starting time of motor.Motor is from stall start, and for the ease of starting, control gear 10 output suction valve control electromagnetic valve 6 are opened signal (suction valve 9 cuts out), export the first contactor KM1 release signal, export the second contactor KM2 adhesive signal.Like this, finish starting under no load at t21 time motor 1 with star schema, motor operating current is less.
T22: normal pressurized air time of compressor.After motor 1 is finished starting, control gear 10 the output second contactor KM2 release signal, the first contactor KM1 adhesive signal and suction valve control electromagnetic valve 6 shutdown signals (suction valve 9 is open-minded).Like this, in the t22 time, compressed air generator 2 just carries out compressed-air actuated work under the bigger triangle pattern of the running current of motor 1, and compressed air pressure in the gas holder 4 is risen to the high value P H of setting pressure.
T23: pressure fall time.The t23 elapsed time, air pressure rises to the high value PH of setting pressure in the gas holder 4, control gear 10 output suction valve control electromagnetic valve 6 are opened signal (suction valve 9 cuts out), the first contactor KM1 release signal, the second contactor KM2 adhesive signal, like this, in the t23 time, motor 1 drives compressed air generator 2 and unload operation under star schema, and compressed air pressure drops to and sets low value PL in gas holder 4.
T24: normal pressurized air time of compressor.The t24 elapsed time, air pressure drops to and sets low value PL in the gas holder 4, the control gear 10 outputs second contactor release signal, the first contactor adhesive signal, suction valve control electromagnetic valve 6 shutdown signals (suction valve is open-minded), like this, in the t24 time, motor 1 carries out compressed-air actuated work under triangle pattern, compressed air pressure constantly rises in the gas holder 4.
Behind t25, constantly repeat above process.
With reference to Fig. 3, further:
Compressed air pressure rises to the high value PH of setting pressure in gas holder 4; when motor 1 drives compressed air generator 2 with star schema unloading operation; in order to reduce the energy consumption of motor 1 to a greater extent; in a time t Δ; control gear 10 is judged gas holder 4 compressed air pressure rate of descent Δ p/ Δ T; if pressure rate of descent Δ p/ Δ T is during more than or equal to some setting values; illustrate that gas consumption is bigger; PH is shorter to the time of pressure low value PL from the high value of pressure; at this moment motor 1 should not be shut down; the control gear 10 control second contactor KM2 continues adhesive, and motor 1 moves continuously with star schema.
When if pressure rate of descent Δ p/ Δ T is less than or equal to some setting values; illustrate that gas consumption is smaller, PH is longer to the time of pressure low value PL from the high value of pressure, and at this moment motor 1 can be shut down; the control gear 10 control first contactor KM1 and the second contactor KM2 discharge, and motor 1 outage is shut down.
Δ p/ Δ T=(PH-PL)/T, therefore, by the variation in pressure Δ p in the Δ T, can extrapolate holding time to pressure low value PL from the high value PH of pressure, therefore, in fact, the size of judgement gas holder 4 compressed air pressure rate of descent Δ p/ Δ T also just can be converted into and judge the length of holding time of the high value PH of pressure to pressure low value PL.
Can help distincter this process in the detailed description of Fig. 3.
Tq (with the t21 of Fig. 2): 1 star-delta starting time of motor.Motor is from stall start, and for the ease of starting, control gear 10 output suction valve control electromagnetic valve 6 are opened signal (suction valve 9 cuts out), export the first contactor KM1 release signal, export the second contactor KM2 adhesive signal.Like this, finish starting under no load at tq time motor 1 with star schema.
T31 (with the t22 of Fig. 2): the normal pressurized air of compressor time.After motor 1 is finished starting, control gear 10 the output second contactor KM2 release signal, the first contactor KM1 adhesive signal and suction valve control electromagnetic valve 6 shutdown signals (suction valve 9 is open-minded).Like this, in the t31 time, compressed air generator 2 just carries out compressed-air actuated work under the triangle pattern of motor 1, and compressed air pressure in the gas holder 4 is risen to the high value PH of setting pressure.
T Δ: pressure rate of descent Δ p/ Δ T judgement time.In the t Δ elapsed time, air pressure rises to the high value PH of setting pressure in the gas holder 4, control gear 10 output suction valve control electromagnetic valve 6 are opened signal (suction valve 9 cuts out), the first contactor KM1 release signal, the second contactor KM2 adhesive signal, like this, at the t delta time, motor 1 drives compressed air generator 2 and unload operation under star schema.Simultaneously, in time t Δ, pressure rate of descent Δ p/ Δ T determining program of computer unit 101 operations.
T32: the working time when the pressure rate of descent is big.At the t delta time, when control gear 10 is judged gas holder compressed air pressure rate of descent Δ p/ Δ T more than or equal to some setting values, control gear 10 continues output suction valve control electromagnetic valve 6 and opens signal (suction valve 9 cuts out), the first contactor KM1 release signal, the second contactor KM2 adhesive signal, motor 1 continues with star schema unloading operation, and compressed air pressure drops to and sets low value PL in gas holder 4.
T33: normal pressurized air time of compressor.In the t33 elapsed time, air pressure drops to and sets low value PL in the gas holder 4, the control gear 10 outputs second contactor KM2 release signal, the first contactor KM1 adhesive signal, suction valve control electromagnetic valve 6 shutdown signals (suction valve is open-minded), like this, in the t33 time, motor 1 carries out compressed-air actuated work under triangle pattern, and compressed air pressure in the gas holder 4 is risen to the high value PH of setting pressure.
T Δ: pressure rate of descent Δ p/ Δ T judgement time.Second t Δ elapsed time, air pressure rises to the high value PH of setting pressure in the gas holder 4, control gear 10 output suction valve control electromagnetic valve 6 are opened signal (suction valve 9 cuts out), the first contactor KM1 release signal, the second contactor KM2 adhesive signal, like this, at the t delta time, motor 1 drives compressed air generator 2 and unload operation under star schema.Simultaneously, in time t Δ, pressure rate of descent Δ p/ Δ T determining program of computer unit 101 operations.
T34: when pressure rate of descent working time hour.At the t delta time; control gear 10 is judged when gas holder compressed air pressure rate of descent Δ p/ Δ T are less than or equal to some setting values; control gear 10 output suction valve control electromagnetic valve 6 are opened signal (suction valve 9 cuts out), the first contactor KM1 release signal, the second contactor KM2 release signal; motor 1 outage is shut down, and compressed air pressure drops to and sets low value PL in gas holder 4.
Tq:(is with the t21 of Fig. 2): the 1 star-delta starting time of motor.Because the shutdown of t34 time motor 1, control gear 10 output suction valve control electromagnetic valve 6 are opened signal (suction valve 9 cuts out), the first contactor KM1 release signal, the second contactor KM2 adhesive signal.Like this, finish starting under no load at tq time motor 1 with star schema.
Behind t35, constantly repeat above process.
Further:, a soft starter device 8 is set between power supply and motor 1 in order to realize the starting of motor 1 more smoothly.
Referring to Fig. 4, the working procedure of present embodiment is described.
A, B, C three phase mains insert motor 1 via switch ZK, soft starter device 8, get the electric corresponding initialization of carrying out with time-control apparatus 10.
After motor 1 was finished soft start, motor 1 carried out compressed-air actuated work under the triangle mode of operation, and air pressure constantly rises in the gas holder 4.When compressed air pressure rose to setting high value PH, control gear 10 control suction valve control electromagnetic valve 6 were open-minded, and suction valve 9 cuts out, and the first contactor KM1 discharges, the second contactor KM2 adhesive, and motor 1 is worked under star schema.
Air pressure drops to and sets low value PL in gas holder 4, the control gear 10 outputs second contactor KM2 release signal, the first contactor KM1 adhesive signal, suction valve control electromagnetic valve 6 shutdown signals (suction valve is open-minded), like this, motor 1 carries out compressed-air actuated work again under triangle pattern, and air pressure improves constantly in gas holder 4, successively, said process constantly repeats.
In order to reduce the operation energy consumption of motor 1, further:
Air pressure rises to the high value PH of setting pressure in gas holder 4, motor 1 drives compressed air generator 2 and unloads under star schema when moving, in order to reduce the energy consumption of motor 1 to a greater extent, in a time t Δ, control gear 10 is judged gas holder 4 compressed air pressure rate of descent Δ p/ Δ T, if pressure rate of descent Δ p/ Δ T is during more than or equal to some setting values, control gear 10 controls second contactor continues adhesive, and motor moves continuously with star schema.
If when pressure rate of descent Δ p/ Δ T is less than or equal to some setting values, illustrate that gas consumption is smaller, PH is longer to the time of pressure low value PL from the high value of pressure, and at this moment motor 1 can be shut down, the stopping signal of control gear 10 output soft starter devices 8.
By Δ p/ Δ T=(PH-PL)/T, can extrapolate holding time to pressure low value PL at the high value PH of pressure, therefore, in fact, judge that the size of gas holder 4 compressed air pressure rate of descent Δ p/ Δ T also just can be converted into the length of holding time of the high value PH of judgement pressure to pressure low value PL.
Air pressure drops to and sets low value PL in gas holder 4, the starting-up signal of the performance element 105 output soft starter devices 8 of control gear 10, and, control gear 10 output suction valve control electromagnetic valve 6 are opened signal, the first contactor KM1 adhesive signal, the second contactor KM2 release signal, the voltage that soft starter device 8 outputs slowly increase drives motor 1 is finished the motor 1 of certain hour time-delay with triangle pattern Soft Start-up Process once more.
For light start more with reduce the energy consumption of motor 1 star operation, further:
Between compressed air generator 2 and gas holder 4, set gradually at least one bypass outlet valve 12 and an one-way valve 3.When the pressure transducer 5 of gas holder 4 reaches the high value PH of setting, motor 1 finishes the triangle operating mode, be converted to the operation of star operating mode, though suction valve control electromagnetic valve 6 energising adhesives this moment, suction valve 9 cuts out, greatly reduce the running current of electric 1 machine, but owing to have high-pressure air in compressed air generator 2 chambeies that motor 1 drives, motor 1 still needs to overcome some extra resistances.Therefore, the utmost point is necessary the high-pressure air emptying in compressed air generator 2 chambeies.
Bypass outlet valve 12 certain constantly open-minded, can make compressed air generator 2 keep communicating of a period of time with outside atmosphere under the control of control gear 10, and like this, the pressure in the compressed air generator 2 is the normal pressure of outside atmosphere.Being used of bypass exhaust-valve 12 and suction valve 9 can effectively be reduced the energy consumption of motor 1.
Referring to accompanying drawing 5, the output signal of the performance element 107 of control gear 10 is connected to bypass outlet valve 12, and CPU is based on being loaded into the control program among the ROM and being stored in the operation that data among the RAM are controlled bypass outlet valve 12.
Below on the basis of the compressor operating of above narration, illustrate bypass exhaust-valve 12 separately and with the situation that is used of suction valve 9.Understand that for simplicity narration no longer repeats for the part that repeats below,
1. the only application when the starting of motor 1 of bypass outlet valve 12: the described bypass outlet valve 12 of control gear 10 controls, only open-minded when motor 1 drives compressed air generator 2 startings, when compressed air generator 2 proper functioning, close.
2. bypass outlet valve 12 and suction valve control electromagnetic valve 6 cooperate the application of the starting of motor 1: the described bypass outlet valve 12 of control gear 10 controls is open-minded when motor 1 drives compressed air generator 2 startings, closes when compressed air generator 2 proper functioning; And the output of control gear 10 is connected to suction valve control electromagnetic valve 6, when motor 1 drives compressed air generator 2 startings, suction valve control electromagnetic valve 6 is open-minded, suction valve 9 cuts out, and suction valve control electromagnetic valve 6 is closed when compressed air generator 2 proper functioning, and suction valve 9 is open-minded.
3. the only application when pressure rises to setting high value PH of bypass outlet valve 12: control gear 10 is according to the testing signal of pressure transducer 5, it is open-minded when the testing signal of pressure transducer 5 rises to setting high value PH to control described bypass outlet valve 12, closes when compressed air generator 2 proper functioning.
4. the application when bypass outlet valve 12 and suction valve control electromagnetic valve 6 cooperate pressure to rise to setting high value PH: control gear 10 is according to the testing signal of pressure transducer 5, it is open-minded when the detected pressures of pressure transducer 5 arrives setting high value to control described bypass outlet valve 12, closes when compressed air generator 2 proper functioning; And, control gear 10 is according to the testing signal of pressure transducer 5, when the detected pressures of pressure transducer 5 arrives the high value of setting, it is open-minded to control described suction valve control electromagnetic valve 6, suction valve 9 cuts out, suction valve control electromagnetic valve 6 is closed when compressed air generator 2 proper functioning, and suction valve 9 is open-minded.
5. the starting of bypass outlet valve 12 and suction valve control electromagnetic valve 6 cooperation motors 1 and pressure rise to the application when setting high value PH: the output of control gear 10 is connected to bypass outlet valve 12, it is open-minded when motor 1 drives compressed air generator 2 startings to control described bypass outlet valve 12, the output of closing when compressed air generator 2 proper functioning with control gear 10 is connected to suction valve control electromagnetic valve 6, when motor 1 drives compressed air generator 2 startings, suction valve control electromagnetic valve 6 is open-minded, suction valve 9 cuts out, suction valve control electromagnetic valve 6 is closed when compressed air generator 2 proper functioning, and suction valve 9 is open-minded; And, control gear 10 is according to the testing signal of pressure transducer 5, when the detected pressures of pressure transducer 5 arrives the high value of setting, control bypass outlet valve 12 and suction valve control electromagnetic valve 6 are open-minded, bypass outlet valve 12 and suction valve control electromagnetic valve 6 are closed when compressed air generator 2 proper functioning, and suction valve 9 is open-minded.
More than five kinds of situations, bypass exhaust-valve 12 can only use when motor 1 starting, also can be only when rising to the high value PH of setting, uses the pressure of gas holder 4, and also can be when motor 1 starting and when the pressure of gas holder 4 rises to the high value PH of setting, all play a role.Simultaneously, bypass exhaust-valve 12 more can with 6 actings in conjunction of suction valve control electromagnetic valve.
Accompanying drawing 6, accompanying drawing 7 correspond respectively to accompanying drawing 2, accompanying drawing 3, under the situation that has increased bypass outlet valve 12, show motor 1 operating mode, running current and suction valve 9, working state schematic representation when bypass outlet valve 12 cooperatively interacts very intuitively.
From Fig. 6, Fig. 7 as can be seen: bypass exhaust-valve 12 and suction valve 9 both combinations can guarantee the light running when pressure that motor 1 empty wagons drives the starting of compressed air generator 2 and gas holder 4 rises to the high value PH of setting.
In addition, the following application that current transformer is set on the connecting line of motor 1 can be strengthened the protection for motor.
On the connecting line of motor 1, current transformer is set; the output signal of current transformer is connected to control gear 10; control gear 10 is according to the testing signal of current sensor; when the fault current of setting occurring; control gear 10 can be by performance element 103, the 104 output first contactor KM1 and the second contactor KM2 release signals, and motor 1 outage is shut down.
Under the situation that soft starter device 8 is arranged; the output signal of current transformer is connected to control gear 10 by interface circuit, via the processing of computer unit 101, when the fault current of setting occurring; control gear 10 is by performance element 106 output stopping signals, and soft starter device 8 is shut down.Perhaps, control gear 10 is by performance element 103, the 104 output first contactor KM1 and the second contactor KM2 release signals, and motor 1 outage is shut down.Perhaps, both move simultaneously, and promptly control gear 10 is by performance element 106 output stopping signals with by performance element 103, the 104 output first contactor KM1 and the second contactor KM2 release signals.
The above embodiments are embodiment of the present utility model, various not illustrating is construed as limiting flesh and blood of the present utility model, the person of an ordinary skill in the technical field can make an amendment or is out of shape after having read specification above-described embodiment, and does not deviate from the spirit and scope of the invention.
Claims (7)
1. air compressor comprises:
Gas holder, the employed pressurized air of described gas holder storage pneumatic equipment;
Compressed air generator, outside air enters compressed air generator by air filter, and described compressed air generator pressurized air also transmits pressurized air and be stored in the described gas holder;
Motor, described motor driving compressed air generator produces pressurized air;
Suction valve is arranged between air filter and the compressed air generator, and described suction valve is when opening state, and from then on air enters compressed air generator;
The suction valve control electromagnetic valve is connected between gas holder and the suction valve by air pipe, and when this suction valve control electromagnetic valve was opened, suction valve can cut out by outside air, otherwise suction valve is open-minded;
Pressure transducer is arranged on the gas holder, can detect the compressed air pressure in the gas holder;
Also comprise:
First contactor connects motor windings, and the control motor moves with triangle pattern;
Second contactor connects motor windings, and the control motor moves with star schema;
It is characterized in that:
Described air compressor also comprises a control gear, and described control gear is connected with the output of pressure transducer, and according to the testing signal of pressure transducer, the opening or closing of control suction valve control electromagnetic valve;
Described control gear is connected with first contactor, second contactor respectively, and passes through the adhesive or the release of control first contactor, second contactor, and then the operating mode or the shutdown of control motor.
2. air compressor according to claim 1, it is characterized in that: described control gear comprises the computer unit that is connected by Internal Bus by central processing unit (CPU), random access memory, ROM (read-only memory), interface circuit, and the display unit that is connected with computer unit, input unit, performance element; By input unit parameter is set, transmit signal by interface circuit, computer unit compares the external detection signal of transmission and the parameter of setting, judge, and send a signal to corresponding performance element by interface circuit according to judged result, corresponding performance element starts or stops associated external devices, makes it to open or close
3. air compressor according to claim 1 is characterized in that:
One soft starter device is set between power supply and motor, and the output of control gear connects the start switch and the halt switch of soft starting device, with control electric motor starting and shutdown.
4. air compressor according to claim 1, it is characterized in that: between compressed air generator and gas holder, set gradually at least one bypass outlet valve and an one-way valve, the bypass outlet valve is under the control of control gear, certain constantly open-minded, make compressed air generator keep communicating of a period of time with outside atmosphere.
5. air compressor according to claim 4, it is characterized in that: the output of control gear is connected to the bypass outlet valve, control gear is according to the testing signal of pressure transducer, it is open-minded when the testing signal of pressure transducer rises to setting high value to control described bypass outlet valve, closes when the compressed air generator proper functioning.
6. air compressor according to claim 5, it is characterized in that: the output of control gear is connected to the bypass outlet valve, control gear is according to the testing signal of pressure transducer, it is open-minded when the testing signal of pressure transducer rises to setting high value to control described bypass outlet valve, closes when the compressed air generator proper functioning; And, the output of control gear is connected to the suction valve control electromagnetic valve, control gear is according to the testing signal of pressure transducer, when the testing signal of pressure transducer rises to setting high value, it is open-minded to control described suction valve control electromagnetic valve, and suction valve cuts out, when the compressed air generator proper functioning, control suction valve control electromagnetic valve is closed, and suction valve is open-minded.
7. according to claim 5 or 6 described air compressors, it is characterized in that: the output of control gear is connected to the bypass outlet valve, control gear is according to the testing signal of pressure transducer, it is open-minded when the testing signal of pressure transducer rises to setting high value to control described bypass outlet valve, the output of closing when the compressed air generator proper functioning with control gear is connected to the suction valve control electromagnetic valve, control gear is according to the testing signal of pressure transducer, when the testing signal of pressure transducer rises to setting high value, it is open-minded to control described suction valve control electromagnetic valve, suction valve cuts out, when the compressed air generator proper functioning, control suction valve control electromagnetic valve is closed, and suction valve is open-minded; And, the output of control gear is connected to the bypass outlet valve, it is open-minded when the driven by motor compressed air generator starts to control described bypass outlet valve, the output of closing when the compressed air generator proper functioning with control gear is connected to the suction valve control electromagnetic valve, and when the driven by motor compressed air generator started, control suction valve control electromagnetic valve was open-minded, suction valve cuts out, when the compressed air generator proper functioning, control suction valve control electromagnetic valve is closed, and suction valve is open-minded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201166001U CN201802600U (en) | 2010-02-11 | 2010-02-11 | Air compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201166001U CN201802600U (en) | 2010-02-11 | 2010-02-11 | Air compressor |
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| CN201802600U true CN201802600U (en) | 2011-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010201166001U Expired - Fee Related CN201802600U (en) | 2010-02-11 | 2010-02-11 | Air compressor |
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| CN102852777A (en) * | 2011-06-29 | 2013-01-02 | 福特全球技术公司 | Compressor control method |
| CN103009960A (en) * | 2012-12-26 | 2013-04-03 | 潍柴动力股份有限公司 | Monitoring equipment and method for electric air compression system of electric vehicle |
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| CN102852777A (en) * | 2011-06-29 | 2013-01-02 | 福特全球技术公司 | Compressor control method |
| CN102852777B (en) * | 2011-06-29 | 2016-05-04 | 福特全球技术公司 | Compressor control method |
| CN103216390B (en) * | 2012-01-19 | 2016-02-17 | 周登荣 | The energy-storage type electricity generating device in Feng Ta power station |
| CN103216390A (en) * | 2012-01-19 | 2013-07-24 | 周登荣 | Energy storage-type power generation assembly of wind tower power plant |
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| CN103009960A (en) * | 2012-12-26 | 2013-04-03 | 潍柴动力股份有限公司 | Monitoring equipment and method for electric air compression system of electric vehicle |
| CN103009960B (en) * | 2012-12-26 | 2015-02-04 | 潍柴动力股份有限公司 | Monitoring equipment and method for electric air compression system of electric vehicle |
| WO2014115163A2 (en) * | 2013-01-28 | 2014-07-31 | Sekar Subiah | Cylinder press fluid compression system |
| WO2014115163A3 (en) * | 2013-01-28 | 2014-12-24 | Sekar Subiah | Cylinder press fluid compression system |
| CN104153979B (en) * | 2014-05-16 | 2016-08-24 | 沈阳天朗艾尔压缩机有限公司 | The progress control method of a kind of power air compressor and compressor thereof |
| CN104153979A (en) * | 2014-05-16 | 2014-11-19 | 沈阳天朗艾尔压缩机有限公司 | Operation control method of power air compressor and compressor thereof |
| CN104698198A (en) * | 2015-03-24 | 2015-06-10 | 江苏华爵检测技术股份有限公司 | Gas analysis cabinet |
| CN105065245A (en) * | 2015-07-23 | 2015-11-18 | 珠海格力电器股份有限公司 | Refrigeration equipment and compressor soft start device and method |
| CN105971841A (en) * | 2016-04-29 | 2016-09-28 | 东泽节能技术（苏州）有限公司 | Energy-saving method for power system |
| CN106438314A (en) * | 2016-11-10 | 2017-02-22 | 周顺新 | Starlike/triangular seamless joint intelligent control system for air compressor energy-saving operation |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110420 Termination date: 20120211 |