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    • 专利摘要:
    Method for starting and warming up a compressor device with compressor element (2) with an inlet and an outlet (19); an engine (3); a pressure vessel (17) connected to the outlet (19); an inlet valve (9) in the inlet (6) which is held open by means of a spring (14) and which is connected to a control pressure (p16) of a control pressure regulating valve (27) whose input (28) is connected to the boiler pressure (p17) and connected to the signal from a controller (5) to control the control pressure (p16) to the inlet valve (9), means (35) being provided for defrosting the control pressure control valve (27), the method when starting and warming up the compressor device (1) contains steps to test whether the control pressure regulating valve (27) is not blocked by opening the control pressure regulating valve (27) and detecting whether it has opened and, if not, activating the aforementioned means (35).
    公开号:BE1024998B1
    申请号:E2017/5509
    申请日:2017-07-18
    公开日:2018-09-20
    发明作者:Peter Helsen
    申请人:Atlas Copco Airpower Naamloze Vennootschap；
    IPC主号:
    专利说明:

    (30) Priority data:
    12/01/2017 US 62445384 (73) Holder (s):
    ATLAS COPCO AIRPOWER public limited company
    2610, WILRIJK
    Belgium (72) Inventor (s):
    HELSEN Peter 2610 WILRIJK Belgium (54) METHOD FOR STARTING AND HEATING A
    COMPRESSOR DEVICE AND COMPRESSOR DEVICE THAT CAN APPLY SUCH A METHOD (57) Method for starting and warming up a compressor device with compressor element (2) with an inlet and an outlet (19); a motor (3); a pressure vessel (17) connected to the outlet (19); an inlet valve (9) in the inlet (6) which is held open by a spring (14) and communicates with a pilot pressure (pl6) of a pilot pressure control valve (27) whose inlet (28) is connected to the boiler pressure (pl7) and connected to the signal from a controller (5) to control the pilot pressure (pl6) to the inlet valve (9), means (35) being provided to defrost the pilot pressure control valve (27), the method when starting and warming up the compressor device (1) includes steps to test that pilot pressure control valve (27) is not blocked by piloting pilot pressure control valve (27) and detect whether it has opened and if not, activating the aforementioned means (35).
    BELGIAN INVENTION PATENT
    FPS Economy, K.M.O., Self-employed & Energy
    Intellectual Property Office
    Publication number: 1024998 Filing number: BE2017 / 5509
    International classification: F04B 49/03 Date of issue: 20/09/2018
    The Minister of Economy,
    Having regard to the Paris Convention of 20 March 1883 for the Protection of Industrial Property;
    Having regard to the Law of March 28, 1984 on inventive patents, Article 22, for patent applications filed before September 22, 2014;
    Having regard to Title 1 Invention Patents of Book XI of the Economic Law Code, Article XI.24, for patent applications filed from September 22, 2014;
    Having regard to the Royal Decree of 2 December 1986 on the filing, granting and maintenance of inventive patents, Article 28;
    Having regard to the application for an invention patent received by the Intellectual Property Office on 18/07/2017.
    Whereas for patent applications that fall within the scope of Title 1, Book XI, of the Code of Economic Law (hereinafter WER), in accordance with Article XI.19, § 4, second paragraph, of the WER, the granted patent will be limited. to the patent claims for which the novelty search report was prepared, when the patent application is the subject of a novelty search report indicating a lack of unity of invention as referred to in paragraph 1, and when the applicant does not limit his filing and does not file a divisional application in accordance with the search report.
    Decision:
    Article 1
    ATLAS COPCO AIRPOWER public limited company, Boomsesteenweg 957, 2610 WILRIJK Belgium;
    represented by
    VAN VARENBERG Patrick, Arenbergstraat 13, 2000, ANTWERP;
    a Belgian invention patent with a term of 20 years, subject to payment of the annual fees as referred to in Article XI.48, § 1 of the Code of Economic Law, for: METHOD
    FOR STARTING AND WARMING A COMPRESSOR DEVICE AND
    COMPRESSOR DEVICE THAT CAN USE SUCH METHOD.
    INVENTOR (S):
    HELSEN Peter, c / o Atlas Copco Airpower N.V. Boomsesteenweg 957, 2610, WILRIJK;
    PRIORITY:
    12/01/2017 US 62445384;
    BREAKDOWN:
    Split from basic application: Filing date of the basic application:
    Article 2. - This patent is granted without prior investigation into the patentability of the invention, without warranty of the Merit of the invention, nor of the accuracy of its description and at the risk of the applicant (s).
    Brussels, 20/09/2018,
    With special authorization:
    BE2017 / 5509
    A method for starting and warming up a compressor device and compressor device that can use such a method.
    The present invention relates to a method of starting a compressor device.
    More specifically, the invention is intended for starting and warming up a compressor device comprising a motor-driven compressor element with an inlet and an outlet; a pressure boiler connected to the outlet of the compressor element; an inlet valve in the inlet of the compressor element, where the inlet valve is held open by means of a spring and communicates with a control pressure from an electro-pneumatic control pressure control valve, the input of which is connected to the boiler pressure in the pressure boiler and that connected to a control signal to adjust the opening of the pilot pressure valve to control the pilot pressure to the inlet valve.
    With this control pressure, the inlet valve is opened more or less open against the force of the aforementioned spring in order to throttle the air drawn in by the compressor element more or less in function of the air flow demanded by the consumer network.
    The control pressure can in some cases also be used to control the speed of the motor in the case of a motor with pneumatic speed control.
    BE2017 / 5509
    A drawback of such an electro-pneumatic control pressure control valve is that such a valve always has a passage which is very small, typically of the order of 1 to 2 mm 2 , which entails the risk that this control pressure control valve can easily block, usually but not only by freezing residual moisture or condensate after standing still.
    In that case, there is no regulated pilot pressure to control the inlet valve and / or the engine speed, which may result in the compressor installation failing to start up or no control being possible if the compressor assembly should start up anyway, leading to unwanted situations such as increased energy consumption of the machine or increasing the pressure in the boiler until the safety valve opens.
    The present invention aims to solve one or more of the above and other disadvantages.
    To this end, the invention relates to a method for starting and warming up a compressor device of the aforementioned type, which is additionally provided with means for defrosting the control pressure regulating valve, the method comprising the following steps to test whether the compressor device is starting up and warming up control pressure control valve is not blocked:
    - step G, G ': opening the pilot pressure control valve;
    - step H, H ': detecting whether the control pressure control valve has opened or not;
    BE2017 / 5509
    - step I, 1 ': if the control pressure control valve has opened, continue starting and warming up or, if the control pressure control valve has not opened, carry out the following steps:
    - step J, J ': closing the pilot pressure control valve;
    - step M, M ': activating the means for defrosting the control pressure control valve for a certain time interval.
    An advantage is that when starting and warming up the compressor device, it is first tested whether the pilot pressure control valve is blocked by freezing or other causes before loading the compressor device fully, so that if it appears that the pilot pressure control valve is blocked, the necessary measures can be taken first to release the pilot pressure valve or to stop the compressor and give an error signal.
    Since the blocking of a control pressure control valve in a compressor device as described is usually due to freezing, the procedure assumes that, in the event of a blockage, an attempt should first be made to defrost the control pressure control valve and, if this does not work from the first time, repeat a number of times until the control pressure valve is unlocked or until after an imposed maximum number of attempts, the control pressure control valve is still not unlocked, after which an error is indicated and / or the compressor device is shut down in order to determine the cause of the blockage and to solve the problem.
    BE2017 / 5509
    The invention is applicable to a compressor device which is standard equipped with an open / toe tail lift that is used as standard for closing the intake valve at start-up in order to limit the starting power required to drive the starter motor and which requires a large current of the starter batteries, causing them to run out quickly when starting.
    In this case, testing and defrosting can be performed during normal warm-up of the compressor device, which gives the advantage that testing and thawing of the pilot pressure control valve goes unnoticed by the user, since warm-up is a normal procedure when starting, for example ensure that the oil for lubricating the compressor assembly is sufficiently warm to ensure proper lubrication.
    According to an alternative embodiment, the tail lift can be omitted, for example for cost savings, in which case the control pressure control valve is also used as a tail lift at start-up by opening the control pressure control valve during start-up using the control to use the full boiler pressure without control for closing the inlet valve.
    In this case, if the pilot pressure control valve is blocked for some reason, the inlet valve will remain open, which is undesirable when starting, as it consumes unnecessary power from the battery, making it increasingly difficult after each failed start attempt.
    BE2017 / 5509
    starter motor to get around, or in the case of one electric drive motor, to great warming can cause as a result of the high starting currents.
    For this reason, in the event that a tail lift is missing, the control pressure control valve is briefly actuated to open during start-up and it is always tested whether the control pressure control valve has indeed opened. If this is not the case, starting is stopped immediately and an attempt is made to defrost the pilot pressure control valve before attempting another start.
    If, after several attempts at defrosting, the pilot pressure control valve remains blocked despite everything, the compressor device is stopped for checking the pilot pressure control valve on the basis of an error message received by the user regarding a blocked pilot pressure control valve.
    The invention also relates to a compressor device as described above, wherein the control pressure control valve is provided with means for defrosting the control pressure control valve, the means are connected to the above-mentioned control and wherein the control is provided with a driver for starting and warming up the control pressure control valve. open and means to detect whether the pilot pressure control valve has indeed opened and if not, to activate the means for defrosting the pilot pressure control valve during a time interval.
    BE2017 / 5509
    The controller preferably includes a driver for performing a method as described above for a compressor device with or without a tail lift.
    With the insight to better demonstrate the features of the invention, some preferred applications of a method according to the invention for starting and warming up a compressor device and of a compressor device applying this method are described below, by way of example without any limiting character. with reference to the accompanying drawings, in which:
    figure 1 schematically represents a compressor device according to the invention;
    figures 2 and 3 show on a larger scale the part indicated in figure 1 by F2 and F3, respectively;
    figure 4 shows a step-by-step plan of a known method for starting and warming up the compressor device of figure 1;
    figure 5 shows a step-by-step plan of a method according to the invention for starting and warming up the compressor device of figure 1;
    Figure 6 shows a curve as used in the method of Figure 5;
    figure 7 shows an alternative embodiment of a compressor device according to the invention;
    BE2017 / 5509 figure 8 shows a step-by-step plan of an alternative method applied to the alternative compressor device of figure 7.
    The compressor device 1 shown in figure 1 contains a compressor element 2, in this case an oil-injected screw compressor element, although other types are not excluded.
    The compressor element 2 is driven by a motor 3, in this case an internal combustion engine with electronic injection 4, with which the speed of the compressor element 2 can be electronically controlled via a connection 4 'via a control 5. The motor 3 can also be another type motor, for example an electric motor with variable speed.
    An inlet pipe 7 connects to the inlet 6 of the compressor element 2, along which air can be drawn in via the inlet filter 8 through the compressor element 2. In this inlet pipe 7, a pneumatically controlled inlet valve 9 is provided with which the inlet 6 can be closed more or less.
    This inlet valve 9 is shown in more detail in figure 2 and comprises a movable valve body 10 with which the inlet 6 can be closed or opened more or less and for this purpose is connected via a stem 11 to a piston 12 which is movably arranged in a chamber 13 of the inlet valve 9 and which divides the chamber 13 into two partial chambers 13a and 13b.
    BE2017 / 5509
    The inlet valve 9 is pushed by means of a spring 14 in the sub-chamber 13a to the open position of the inlet 6 as shown in figure 2.
    The sub-chamber 13a is connected to the environment via a vent 15.
    In the sub-chamber 13b a control pressure line 16 opens, along which a control pressure p16 can be applied in order to be able to close the inlet valve 9 against the force of the spring 14.
    The inlet valve 9 can also be of a different type, for instance a pneumatically controlled butterfly valve.
    The compressor device 1 further comprises a pressure vessel 17 which communicates via pressure line 18 with the outlet 19 of the compressor element 2.
    The pressure vessel 17 is provided with an outlet 20 to which a pneumatic network of compressed air consumers can be connected.
    In the case of an oil-injected compressor element 2, the pressure boiler 17 also plays the role of oil separator and oil reservoir, from which oil is injected through an oil pipe 21 into the compressor element 2 at one or more injection points 22 for lubrication, sealing and cooling of the compressor element 2 .
    BE2017 / 5509
    A cooler 23 and an oil filter 24 are included in the oil line 21, the cooler 23 being cooled in the case of figure 1 by the fan 25 of the motor 3. The fan can also be driven by a separate electric motor.
    The oil which, together with the compressed air, is fed back to the pressure vessel 17 via the pressure line 18, is separated back in the pressure vessel 17 and collected at the bottom in the pressure vessel 17.
    The user has the option to set a nominal operating pressure pnom of the pressure vessel 17 in the control 5. This control 5 is provided with a driver which in a known manner controls the speed of the motor 3 and controls the opening of the inlet valve 9 by control of the control pressure pl6 to keep the boiler pressure pl7 at this nominal pressure pnom.
    The boiler pressure p17 is determined by means of means 26 in the form of a pressure gauge or the like, the signal of which is fed back to control 5 via a connection 26 '.
    An electro-pneumatic control pressure control valve 27 is provided on the pressure vessel 17, which is shown in more detail in figure 3 and which is provided with an inlet 28 which is connected via a boiler pressure line 29 to the boiler pressure pl7 in the pressure vessel 17 and an outlet 30 connect to the inlet valve 9 via the control pressure line 16.
    BE2017 / 5509
    This control pressure control valve 27 is controlled from control 5 via a connection 31 which will actuate the electro-pneumatic pressure control valve more or less according to the desired control pressure pl6 in order to maintain a boiler pressure pl7 equal to pnom, regardless of the load on the compressor device 1.
    When the boiler pressure pl7 exceeds the nominal pressure pnom, for example because there is less air consumption, a control pressure pl6 is passed through the control pressure control valve 27 to close the inlet valve 9 in whole or in part, so that no more or less air is compressed. and the boiler pressure pl7 cannot increase further. At the same time, for example, the control 5 can lower the speed of the motor 3.
    When more compressed air is withdrawn from the pressure vessel 17 again, the boiler pressure pl7 may fall below the nominal operating pressure, as a result of which the controller 5 will send the control pressure control valve 27 and the control pressure pl6 will drop, causing the inlet valve 9 to be pushed open by the spring 14 and the pressure vessel 17 is replenished with compressed air.
    The control pressure p16 is detected or determined by means of the means 32 in the form of a pressure gauge or the like on the control pressure line 16, the signal of which is fed back to the control 5 via a connection 32 '.
    Furthermore, the compressor device 1 is provided with an extra so-called tail lift 33, which has been mentioned above
    BE2017 / 5509 bridging pressure control valve 27 and for this purpose is provided with a bridging 34 which forms a connection between the pressure boiler 17 or the boiler pressure line 29 and the control pressure line 16.
    This tail lift 33 is a two-position valve with an open and a closed position which can be operated by the control 5 via the connection 33 '. When the tail lift 33 is opened, the boiler pressure pl7 is placed directly on the control pressure line 16 and the control pressure pl6 in that case is equal to the unregulated boiler pressure pl7. Contrary to the control pressure control valve 27, the tail lift 33 is therefore not a controlled valve.
    Such an existing tail lift 33 has a relatively much larger passage, typically 12 mm 2 , than that of the electro-pneumatic pilot pressure control valve 27.
    In the existing compressor devices 1, such a tail lift 33 is used to bring the inlet valve 9 into a closed position when the engine 3 is started and to keep it during the starting and warming up of the compressor device 1 and so to be able to load the compressor element 2 during this phase. drive with a minimum of necessary power.
    Indeed, by closing the inlet valve 9, no air is drawn in except for a small flow rate, and therefore no great power is required to compress air when starting and warming up.
    BE2017 / 5509
    In figure 4 a step-by-step plan is schematically shown of the steps that are normally applied during the starting and warming up of the compressor device 1 without application of the invention. These steps are the following:
    A: turning on the compressor device 1 starting from a state in which the compressor device 1 is turned off; B: initializing the controller 5 of the compressor device 1, with a 'preheat' function when the ambient temperature is very low;
    C: opening the tail lift 33 and starting the motor 3, whereby the boiler pressure pl7 starts to build up which is used to close the inlet valve via the open tail lift 33;
    D: starting the motor 3;
    E: holding the tail lift 33 open to allow the compressor element 2 to warm up under no load and to build a minimum boiler pressure pmin in the pressure vessel 17 in order to obtain a favorable warm-running condition with low energy consumption;
    F: from the moment that the compressor device 1 has been sufficiently warmed up, for example when the temperature of the oil in the pressure vessel 17 has reached a set value, the compressor element 2 can normally be loaded by closing tail lift 33. After this, the control pressure control valve 27, controlled by the controller 5, control the pilot pressure pl6 to open or close the inlet valve 9 more or less to maintain the set nominal pressure pnom in the pressure vessel 17 regardless of a varying load, for example when the compressed air flow decreases) of the compressor device 1.
    BE2017 / 5509
    A problem that can arise with this method is that, due to the small passage of the control pressure control valve 27, typically a passage of the order of 1 to 2 mm 2 , this valve may be blocked, for example because it is frozen. In that case, the normally closed control pressure control valve 27 will not open and the control pressure pl6 will not be able to be controlled by the control 5, as a result of which the compressor device 1 cannot function normally after starting and warming up.
    The invention provides a solution by providing additional steps as shown in Figure 5 during the step E of warming up the compressor device 1 to test in steps G and H whether or not the control pressure control valve 27 is blocked and, if this however, take the appropriate measures by first attempting to defrost the pilot pressure control valve 27 in step M or, if unsuccessful after a number of entered attempts Cmax, generate an error signal in step L to indicate that a another problem lies at the root of the blocking of the pilot pressure control valve.
    In order to test whether the control pressure control valve 27 is blocked or not, in a step G of figure 5, the open tail lift 33 is closed by the control 5 and at the same time a signal is generated by the control 5 to open the control pressure control valve 27, after which step H it is detected whether a control pressure pl6 is present and remains.
    BE2017 / 5509
    If a control pressure p16 is detected in step H, this is an indication that the control pressure control valve 27 has opened, so that in step I it is possible to proceed to step P, where the control pressure valve 27 can be closed again and the tail lift 33 reopened, then to continue warming up in step E and then proceed to step F where the compressor device 1 is placed under load.
    However, if it is detected in step H that no control pressure p16 is present, this means that the control pressure control valve 27 has not opened and may therefore be blocked by freezing.
    In that case, from step I to step J, the compressor element 2 is brought back to the unloaded state by opening the tail lift 33 and opening the control pressure regulating valve 27 to continue the warm-running in the unloaded state.
    Then, in step M, an attempt is made to release the control pressure control valve 27 by defrosting.
    For this purpose, the compressor device 1 is equipped with means 35 for defrosting the control pressure control valve 27, for example in the form of a heating element such as a Peltier element which is mounted on the housing of the control pressure control valve 27 and which is activated by the control 5 for a time interval Dt by provide it with the necessary power via a power wire 35 '.
    BE2017 / 5509
    The predetermined time interval Dt is preferably a function of the ambient temperature Ta as shown in Fig. 6, the time interval Dt being all the shorter when it is warmer outside, although never shorter than a minimum duration Dtmin of, for example, 30 seconds.
    The compressor device 1 has means 36 for determining the ambient temperature Ta, for example in the form of a thermometer, the signal of which is fed back to the control 5 via a connection 36 '.
    In a previous step Ta of the method according to the invention shown in figure 5, the ambient temperature Ta is determined and in a subsequent step Dt, the time interval Dt determined by the control 5 is used in step M for defrosting the control pressure control valve 27 .
    After this time interval Dt, the above-described cycle of testing and thawing of the pilot pressure control valve 27 is repeated a number of times, if necessary, until it is detected in step H that the pilot pressure control valve 27 has opened.
    A counter of the number of cycles passed is kept in control 5 and set to one in the first test G.
    For each cycle run, it is checked in step K whether the counter has reached the maximum number Cmax, after which the running cycle can be continued with step M if this
    BE2017 / 5509 is not, or can be stopped if, however, the generation of an error signal in step L and / or the shutdown of the compressor device 1.
    After each cycle, the counter in step N is incremented by one before starting another cycle of testing and thawing.
    In figure 7 a variant embodiment of a compressor device 1 according to the invention is shown, that of the compressor device 1 of figure 1 differs in that in this case the tail lift 33 and the bridging 34 are missing and the control 5 is programmed to carry out an alternative method according to the invention in which the control pressure control valve 27 can also be used as a tail lift when starting and warming up, which, when opened, will be able to close the inlet valve 9 so that it can start without load and warm up at a minimum pressure in the boiler pmin.
    Steps A ', B', Ta 'and Dt' are the same as steps A, B, Ta and Dt already described.
    Step C 'is the same as step C in which the motor 3 is started, with the difference that now the control pressure valve 27 is opened instead of the loading valve 33 to close the inlet valve 9 in order to start without load.
    An important difference is that the testing of the pilot pressure control valve 27 in steps G 'and H' is now carried out during starting in step C '.
    BE2017 / 5509
    In step G 'in this case, only the control pressure control valve 27 is opened and it is detected in step H' whether control pressure control valve 27 is blocked or not. This can be done, for example, by measuring whether there is a pressure pl6 equal to the boiler pressure pl7 in the control line 16, where, if such pressure pl6 is available, starting is continued until the motor 3 starts in step D 'and one is done in step E 'can run the compressor device 1 under no load with an open-ended pilot pressure control valve 27 to keep the inlet valve 9 closed during this phase. In this case, there is no step P.
    Steps D ', E' and F 'correspond to steps D, E and F as previously described.
    It is important that in step C 'during starting the pilot pressure control valve 27 opens, because otherwise, in the absence of a tail lift 33 to steer the inlet valve 9, this inlet valve 9 would remain open, whereby the starting would require a large capacity of the starter motor and the starter battery, which would seriously mortgage subsequent attempts to start, especially in cold conditions which are known to have a negative impact on the availability of batteries.
    For that reason, steps G 'and H' are performed during starting.
    Step G 'is the same as step G, but without the need to actuate a tail lift, since it is absent.
    BE2017 / 5509
    Step H 'corresponds to step H.
    If the test in step 1 'control pressure control valve 27 blocked stopping of the compressor device, closing the control pressure control valve
    exclaims Which it is then follows it 1 in step S 'and it iel 27 in step J '
    If in step K 'it appears that the counter of the number of tests and defrosts has reached a set maximum Cmax, an error message is given and / or the compressor device 1 is stopped, if not, in step M' an attempt is made to release the control pressure control valve 27, for example by heating it during the time interval Dt determined in step Dt '.
    Then, in step N ', the counter of the number of tests and thaws is increased by one and a new attempt is then made to start the compressor device 1 with a new step C'.
    By omitting the tail lift 33, the compressor device 1 of figure 7 can be made cheaper than the compressor device of figure 1 with tail lift 33.
    The omission of the tail lift 33 does mean that the control pressure control valve 27 is the only component that can open the intake valve 9 pneumatically.
    This implies that a different procedure must be followed before starting, where it may occur after
    BE2017 / 5509 switching on the compressor device 1 does not want to start the engine 3 when starting, but on the contrary a number of start attempts are required before starting the engine, which users may not be used to and therefore may seem strange as a defect, although this most cases will not be.
    In a compressor device 1 with a loading valve 33, on the other hand, the testing and thawing can be carried out unnoticed during the warming-up of the compressor device 1, which is always necessary.
    An advantage is that in this case the starting does not have to be interrupted when the control pressure control valve 27 is frozen or defective and that the detection and thawing for the user takes place almost unnoticed, since this occurs during the heating-up phase, which is also always present in the known compressor devices 1 .
    Detecting whether the control pressure control valve 27 has opened after opening it can also be done in other ways than by detecting whether a control pressure p16 is present after opening it. This can also be detected, for example, on the basis of detecting the effects of the closing of the inlet valve 9 due to the presence of the control pressure pl6, for example its effects on the load of the engine 3 or on the temperature of the compressed gas at the outlet 19 of the compressor element 2 or at the negative pressure after the inlet valve 9 or the like.
    BE2017 / 5509
    The invention is not limited to the above-described type of compressor element 2 with electro-pneumatically controlled inlet valve, but is also applicable by extension to a compressor device 1 with spiral compressor or the like, whether or not oil-injected or the like.
    Nor is the invention limited to the type of engine described above, but it is also applicable by extension, for example with an electric motor with a fixed or variable speed, or with a combustion engine with pneumatically controlled fuel supply, or the like.
    The means 35 for defrosting the control pressure valve 27 can also take other forms than a heating element, for example with microwaves, ultrasonic, laser or the like.
    The control 5 is preferably integrated in an existing control of the compressor device 1.
    The invention is by no means limited to the applications described above and shown in the figures, but such a method and compressor device can be applied according to different variants without departing from the scope of the invention.
    BE2017 / 5509
    权利要求:
    Claims (20)
    [1]
    Conclusions.
    1.- Method for starting and warming up a compressor device comprising a compressor element (2) driven by a motor (3) with an inlet (6) and an outlet (19); a pressure boiler (17) connected to the outlet (19) of the compressor element (2); an inlet valve (9) in the inlet (6), which inlet valve (9) is pushed into an open position by means of a spring (14) and communicates with a control pressure (pl6) from an electro-pneumatic control pressure control valve (27), the input (28) is connected to the boiler pressure (pl7) in the pressure boiler (17) and is connected to the signal from a controller (5) to control the control pressure (pl6) to the inlet valve (9), characterized in that the compressor device (1) is provided with means (35) for defrosting the control pressure control valve (27), the method of starting and warming up the compressor device (1) comprising the following steps for testing whether the control pressure control valve (27) is blocked :
    - step G, G ': opening the pilot pressure control valve (27);
    - step H, H ': detecting whether the control pressure control valve (27) has opened or not;
    step I, I ': if the control pressure control valve (27) has opened, continue starting and warming up or, if the control pressure control valve has not opened, then carry out the following steps:
    - step J, J ': closing the pilot pressure control valve (27);
    BE2017 / 5509
    - step Μ, Μ ': activating the means (35) for defrosting the pilot pressure control valve (27) for a certain time interval (Dt).
    [2]
    Method according to claim 1, characterized in that said steps G, G 'to Μ, M' are repeated in a number of successive cycles of testing and thawing until when steps H, H 'and I occur during the execution of steps H, H' and I , 1 'it is detected that the pilot pressure control valve (27) has opened or until it is determined in step K, K' that the number of cycles since the first start attempt has reached an imposed maximum (Cmax), in which case an error message L, L ' is generated.
    [3]
    Method according to claim 1 or 2, characterized in that for the step H, H 'of detecting whether the control pressure control valve (27) has opened, it is carried out by detecting whether or not control pressure (pl6) is present at the outlet (30) of the pilot pressure control valve (27), the presence of a pilot pressure (pl6) indicating that the pilot pressure control valve (27) has opened.
    [4]
    Method according to one of the preceding claims, characterized in that the ambient temperature (Ta) is determined and that the aforementioned time interval (Dt) for activating the means (35) for defrosting the control pressure control valve (27) is determined in function of the ambient temperature (Ta), this time interval (Dt) being all the longer when the ambient temperature (Ta) is low.
    BE2017 / 5509
    [5]
    Method according to one of the preceding claims, characterized in that the time interval (Dt) is not less than an imposed minimum (Dtmin).
    [6]
    Method according to any one of the preceding claims, characterized in that a heating element mounted on the control pressure control valve (27) is used for defrosting the control pressure control valve (27).
    [7]
    Method according to any one of the preceding claims, characterized in that when the pilot pressure control valve (27) is the only component of the compressor device (1) which is intended to be able to pneumatically close the inlet valve (9), and that when the Steps H 'and 1' determine that the pilot pressure control valve (27) is not
    opened up , the following steps are taken: - step S ': it shutdown of the compressor equipment (1); - step M ': it defrosting the pilot pressure control valve (27); - step C ': it restart; - step G ': it start a next cycle of testing and thaw.
    [8]
    Method according to claim 7, characterized in that when it is determined during steps H 'and 1' that the control pressure control valve (27) has indeed opened, the following steps are taken:
    - step D ': keeping the pilot pressure control valve (27) open to close the inlet valve (9) and starting the engine (3);
    BE2017 / 5509
    - step E ': allowing the compressor device (1) to warm up in an unloaded state until the compressor device (1) has warmed up sufficiently to be able to switch to the loaded state in step F'.
    [9]
    Method according to any one of claims 1 to 6, characterized in that the compressor device (1) is provided with an open / toe loading valve (33) which bridges the control pressure control valve (27) and which can open the inlet valve (9) when opened. connect to the boiler pressure (pl7) to close the inlet valve (9), in which case the following steps are carried out in the process before going through the steps of testing and defrosting the control pressure control valve (27):
    - C: opening the tail lift (33) to close the intake valve (9);
    - D: starting the compressor device (1) and starting the engine (3).
    [10]
    Method according to claim 9, characterized in that the method further comprises the step E of driving the compressor element (2) without load with the open tail lift (33) to warm up the compressor device (1) without load and in that the steps of testing and defrosting the pilot pressure control valve (27) is performed during this no load warm-up phase, where:
    - during step G the tail lift (33) is additionally temporarily closed at the same time as opening the pilot pressure control valve (27), and
    BE2017 / 5509
    - during step J the tail lift (33) is additionally opened again, simultaneously with the closing of the pilot pressure control valve (27).
    [11]
    Method according to claim 10, characterized in that after each cycle run a further cycle of testing and defrosting is started until when it is detected during steps H and I that the control pressure control valve (27) has opened, after which in a step P the control pressure valve (27) is closed again and the tail lift (33) is reopened and the warm-up phase in step E is continued until the compressor device (1) has warmed up enough to switch to a loaded state in step F.
    [12]
    Method according to one of the preceding claims, characterized in that it is automated in that the control (5) is programmed for this purpose to appropriately control the control pressure control valve (27) and the tail lift (33) if a tail lift (33) is present is, as well as the means (35) for defrosting the pilot pressure control valve (27), in function of the Signals that the controller (5) receives from means (32) to detect or determine the pilot pressure (pl6) and from means ( 36) to determine the ambient temperature (Ta).
    [13]
    Method according to any one of the preceding claims, characterized in that it comprises the step of pre-providing the control (5) with a maximum number of cycles (Cmax) of tests and thawing to be performed and with a minimum time interval (Dtmin ) before defrosting.
    BE2017 / 5509
    [14]
    Method according to any one of the preceding claims, characterized in that it comprises the step of pre-supplying the control (5) with a curve giving the time interval (Dt) to be applied in function of the ambient temperature (Ta).
    [15]
    15. - Compressor device provided with a compressor element (2) driven by a motor (3) with an inlet (6) and an outlet (19); a pressure boiler (17) connected to the outlet (19) of the compressor element (2); an inlet valve (9) in the inlet (6), which inlet valve (9) is pushed into an open position by means of a spring (14); an electro-pneumatic pilot pressure control valve (27) with an inlet (28) connected to the boiler pressure (pl7) in the pressure boiler (17) and an outlet (30) connected to the inlet valve (9); a control (5) connected to the control pressure control valve (27) for controlling a control pressure (pl6) at the outlet (30) of the control pressure valve (27), characterized in that the control pressure control valve (27) is provided with means (35 ) to defrost the control pressure control valve (27), which means (35) are connected to the aforementioned control (5), the control (5) being provided with a driver to open the control pressure control valve (27) at the start and means to detect whether the pilot pressure control valve (27) has indeed opened and if not, to activate the means (35) for defrosting the pilot pressure control valve (27) during a time interval (Dt).
    BE2017 / 5509
    [16]
    Compressor device according to claim 15, characterized in that the means for detecting whether the control pressure control valve (27) has opened after it has received a signal to open from the control (5) is formed by detecting (p16). on the control pressure control valve (27), the control pressure (pl6) indicates (27) has opened.
    3f whether or not with a control pressure the output (30) of the presence of one that the control pressure control valve
    [17]
    Compressor device characterized in that pilot pressure control valve (27) is formed a heating element pilot pressure control valve (27) according to claim 15 or the means (35) for defrosting which is arranged on or in.
    16, it through it
    [18]
    Compressor device according to any one of claims 15 to 17, characterized in that the pilot pressure control valve (27) is the only component of the compressor device (1) which is intended to be able to pneumatically close the inlet valve (9).
    [19]
    Compressor device according to any one of claims 15 to 17, characterized in that the compressor device (1) contains, in addition to the pilot pressure control valve (27), a second component in the form of an open / toe tail lift (33), which is intended around the inlet valve. which tailgate (33) bridges the pilot pressure control valve (27) and connects the inlet valve (9) to the boiler pressure (pl7) to close the inlet valve (9).
    2017/5509
    BE2017 / 5509
    [20]
    Compressor device according to any one of claims 15 to 19, characterized in that the controller (5) is provided with a driver for performing a method according to any one of claims 1 to 14.
    BE2017 / 5509
    BE2017 / 5509
    2 3
    BE2017 / 5509
    BE2017 / 5509
    BE2017 / 5509
    BE2017 / 5509
    BE2017 / 5509
    A method for starting and warming up a compressor device and compressor device that can use such a method.
    A method for starting and warming up a compressor device with compressor element (2) with an inlet and an outlet (19); a motor (3); a pressure vessel (17) connected to the outlet (19); an inlet valve (9) in the inlet (6) which is held open by a spring (14) and communicates with a pilot pressure (pl6) of a pilot pressure control valve (27) whose inlet (28) is connected to the boiler pressure (pl7) and connected to the signal from a controller (5) to control the pilot pressure (pl6) to the inlet valve (9), means (35) being provided to defrost the pilot pressure control valve (27), the method when starting and warming up the
    compressor device (1) contains steps to to to test or pilot pressure control valve (27: ) not blocked is through it pilot pressure control valve (27) open and to to detect whether it has opened and if not, activate it the
    the aforementioned means (35).
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    同族专利:
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    BE1024998A1|2018-09-13|
    引用文献:
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    GB541779A|1939-05-30|1941-12-11|Sulzer Ag|Improvements in or relating to apparatus for use in the starting of internal combustion engines of the free piston type|
    GB588521A|1945-02-26|1947-05-27|Bristol Pneumatic Tools Ltd|Improvements in or relating to automatic control systems for air compression plants|
    GB944312A|1960-08-09|1963-12-11|Engins Pistons Libres Epl|Improvements in a starting system for free-piston internal combustion engines|
    US3796515A|1972-06-01|1974-03-12|Atlas Copco Ab|Plants comprising a combustion engine and a compressor driven by said engine|
    JPS56138483A|1980-03-29|1981-10-29|Tokico Ltd|Engine driven-type compressor|
    EP0089058A2|1982-03-16|1983-09-21|Bühler AG|Method and device for regulating a variable, and application of the method|
    GB2117456A|1982-03-30|1983-10-12|Daimler Benz Ag|A reciprocating piston air compressor|
    法律状态:
    2018-11-12| FG| Patent granted|Effective date: 20180920 |
    优先权:
    申请号 | 申请日 | 专利标题
    US201762445384P| true| 2017-01-12|2017-01-12|
    US62445384|2017-01-12|
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