JP5612721B2 - air compressor - Google Patents

Description

  The present invention relates to an air compressor provided with an exchange object used together with the operation of a compressor body.

  In an air compressor, in order to use it in a safe and efficient state for a long period of time, it is indispensable to periodically replace a replacement object (maintenance part). As a specific example of the object to be replaced in the oil supply type air compressor (specifically, oil is injected into the working chamber of the compressor body), a belt for transmitting power between the compressor body and the electric motor, compression A suction filter provided on the suction side of the machine main body for removing impurities in the intake air, a lubricating oil supplied to the compressor main body, a separator element for separating the lubricating oil from the compressed air generated in the compressor main body, and impurities in the lubricating oil An oil filter or the like that removes water may be used. These exchange objects are preferably exchanged according to the exchange time defined in the maintenance standards.

  Here, conventionally, for example, in a vehicle air conditioner, an integration recording means for integrating the operation time of a compressor, and an appropriate maintenance time of parts requiring maintenance (for example, a dust filter, packing, seal, duct, belt, etc.) Maintenance time setting means for presetting (time for cleaning, replacement, etc.), comparison means for comparing the operation time recorded in the integrated recording means with the maintenance time input from the maintenance time setting means, and the operation time for maintenance time Has been proposed (see, for example, Patent Document 1). In this prior art, the arrival of the maintenance time is displayed, thereby improving the maintenance execution rate and reducing failures due to poor maintenance.

  In addition, for example, in an engine-driven heat pump, a timer that counts the usage time of engine oil (specifically, the cumulative operation time of the engine until the oil is changed) and the display unit are controlled according to the usage time of the engine oil. A configuration is proposed that includes display control means and capacity limiting means for limiting the engine operating capacity in accordance with the usage time of the engine oil (see, for example, Patent Document 2). In this prior art, for example, when the usage time of the engine oil reaches 9800 hours (in other words, when the time when the engine oil needs to be changed is approached), the characters “inspection” are displayed on the display unit, After that, when 10000 hours are reached (when it is time to change the engine oil), the characters “Check” and “L8” indicating the capacity limit operation state are displayed on the display unit. In addition, the engine speed is limited. That is, even if the engine oil is not changed at a time when the engine oil needs to be changed, the engine is not stopped, and the extended operation is performed while limiting the engine operating capacity, thereby satisfying the user's request to some extent. It is like that. Further, not only the display of “inspection” characters but also the reduction of the engine operating capability allows the user to recognize the arrival of the maintenance period.

JP-A-8-48133 JP 2004-286243 A

  The prior art has the following problems. The replacement object includes a manufacturer's recommended product and an alternative product (in other words, a product that is not a recommended product). Generally, although an alternative product is less expensive than a recommended product, the replacement time is short. In the conventional technology, for example, if the timing of the replacement time display (or the suppression of the driving ability at the replacement time) is set based on the replacement time of the recommended product, the timing is delayed when the substitute product is mounted. It will be. For this reason, there is a possibility that the substitute product will be used for a long time beyond the replacement time, and there is room for improvement in terms of safety.

  An object of the present invention is to provide an air compressor that can cope with a case where an object to be replaced is not a recommended product and can improve safety.

(1) In order to achieve the above object, the present invention provides a compressor main body that compresses air, and an air compressor provided with a plurality of types of replacement objects that are used together with the operation of the compressor main body and have different replacement times. in aircraft, the identification information of the compressor and use time calculating means for using time calculating each of the plurality of types of exchange objects based on the operating time of the body, the plurality of types of exchange objects is stored in advance, said plurality Identification information acquisition means for requesting acquisition of the identification information to an IC chip provided on the type of replacement object, and if there is a response to the identification information in response to the acquisition request, the object to be replaced based on the identification information Identifying whether or not the product is a recommended product, and if there is no response itself, identifying means for identifying that the replacement product is not a recommended product, and the usage time of the replacement product identified as a recommended product , the exchange pair Determining whether more than a first reference time set differently in advance according to the type of the object, relative to the time of use of the identified not a recommended product said switching object, said replacement target A determination means for determining whether or not a second reference time set in advance so as to be different depending on the type of the object and shorter than the first reference time is used, and use of the plurality of types of replacement objects Informing means for informing when it is determined that at least one of the times exceeds the corresponding reference time.

(2) In the above (1), preferably, the plurality of types of replacement objects are a belt that transmits power between the compressor body and an electric motor, a suction side of the compressor body, Any of a suction filter for removing impurities, a lubricating oil supplied to the compressor body, a separator element for separating the lubricating oil from compressed air generated in the compressor body, and an oil filter for removing impurities in the lubricating oil Or two or more .

  According to the present invention, it is possible to cope with a case where the replacement object is not a recommended product, and safety can be improved.

It is the schematic showing as an example the structure of the air compressor which is the application object of this invention. It is a block diagram showing the functional structure regarding the replacement time display control of the control apparatus in the 1st Embodiment of this invention. It is a figure showing the setting table of the control apparatus in the 1st Embodiment of this invention as an example. It is a block diagram showing the functional structure regarding the operation control of the control apparatus in the 2nd Embodiment of this invention. It is a flowchart showing the processing content regarding the operation control of the control apparatus in the 2nd Embodiment of this invention. It is a figure showing the setting table of the control apparatus in the 2nd Embodiment of this invention as an example. It is a figure showing the operation control characteristic of the control apparatus in the 2nd Embodiment of this invention, and shows the relationship between the usage time of a replacement | exchange object, and the target value of discharge pressure. It is a figure showing the operation control characteristic of the control apparatus in one modification of this invention, and shows the relationship between the usage time of a replacement | exchange target object, and the maximum rotation speed of a compressor main body. It is a block diagram showing the functional structure regarding the operation control of the control apparatus in the 3rd Embodiment of this invention. It is a flowchart showing the processing content regarding the operation control of the control apparatus in the 3rd Embodiment of this invention. It is a figure showing the setting table of the control apparatus in the 3rd Embodiment of this invention as an example.

A first embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a schematic diagram illustrating an example of a configuration of an air compressor to which the present invention is applied.

  In FIG. 1, an oil supply type air compressor includes a compressor main body 1 that compresses air, an electric motor (motor) 3 that transmits power via a belt 2 to drive the compressor main body 1, and the electric motor 3 An inverter 4 that variably controls the rotational speed, a suction filter 5 that is provided on the suction side of the compressor body 1 to remove impurities in the intake air, a suction throttle valve 6 that is provided on the suction side of the compressor body 1, and a compression An oil tank 7 provided on the discharge side of the machine body 1 for primarily separating the lubricating oil from the compressed air, a separator element 8 for secondarily separating the lubricating oil from the compressed air separated by the oil tank 7, and the separator element 8 And an aftercooler 11 for introducing and cooling the compressed air separated in step 1 through the pressure regulating valve 9 and the check valve 10.

  The lubricating oil separated by the separator element 8 is supplied to the suction side of the compressor body 1. On the other hand, the lubricating oil separated in the oil tank 7 passes through, for example, the interior of the compressor body 1 (for example, a bearing or a working chamber) via an oil cooler 12 that cools the lubricating oil and an oil filter 13 that removes impurities in the lubricating oil. Etc.). In addition, a bypass system for bypassing the oil cooler 12 is provided, and a temperature control valve (three-way) for adjusting the ratio of the cooling flow rate to the oil cooler 13 side and the bypass flow rate to the bypass system is provided at the upstream connection portion of the bypass system. Valve) 14 is provided. The temperature control valve 14 adjusts the ratio of the cooling flow rate and the bypass flow rate according to the temperature of the lubricating oil from the oil tank 7, thereby adjusting the temperature of the lubricating oil supplied to the compressor body 1. Yes. The aftercooler 11 and the oil cooler 12 are air-cooled heat exchangers that are cooled by cooling air generated by a cooling fan 15.

  A pressure sensor 16 that detects the discharge pressure of the compressor body 1 is provided on the downstream side of the aftercooler 11. A detection signal from the pressure sensor 16 is output to the control device 17.

  As the first function (operation control), the control device 17 calculates a deviation between the discharge pressure detection value input from the pressure sensor 16 and a predetermined target value set in advance, and the number of revolutions generated based on the deviation. A command signal is output to the inverter 4. The inverter 4 outputs a frequency according to the rotational speed command signal to the electric motor 3 to variably control the rotational speed of the electric motor 3 (that is, the rotational speed of the compressor body 1).

  For example, when the rotational speed of the compressor main body 1 decreases to the lower limit value of the variable control range and the detected value of the discharge pressure increases to a predetermined upper limit value set in advance, the control device 17 The suction throttle valve 6 is closed while the rotational speed of 1 is fixed at the lower limit (no-load operation). Further, for example, when the detected value of the discharge pressure drops to a predetermined lower limit value during no-load operation, the suction throttle valve 6 is opened (load operation). For example, when the duration of no-load operation exceeds a predetermined time set in advance, the compressor body 1 is stopped.

  Further, the control device 17 has a plurality of replacement objects (specifically, the belt 2, the suction filter 5, the separator element 8, and the oil filter) mounted on the air compressor as a second function (replacement time display control). 13) identifies whether or not the product is recommended by the manufacturer, calculates the usage time thereof based on the operation time of the compressor body 1, and the reference time (replacement time) corresponding to the usage time of the replacement object When it exceeds, it will come to alert you. Details of such replacement time display control will be described below.

  FIG. 2 is a block diagram showing a functional configuration related to the replacement time display control of the control device 17.

  In FIG. 2, the control device 17 includes a communication unit 18, a usage time calculation unit 19, a storage unit 20, an identification setting unit 21, a determination unit 22, a display control unit 23, and a display unit 24.

  The belt 2, the suction filter 5, the separator element 8, and the oil filter 13 incorporate IC chips 2a, 5a, 8a, and 13a, respectively. Each of the IC chips 2a, 5a, 8a, and 13a is identification data (specifically, for example, type information indicating a belt, a suction filter, an oil filter, or a separator element, an individual-specific serial number, and a recommended product) And the like, an antenna for performing wireless communication of data, and a control arithmetic unit for controlling data reading / writing processing and communication processing.

  The communication unit 18 of the control device 17 wirelessly communicates with the IC chip 2a of the belt 2, the IC chip 5a of the suction filter 5, the chip 8a of the separator element 8, and the IC chip 13a of the oil filter 13 inside the air compressor. Is supposed to do. Specifically, an identification data transmission command is output to the IC chips 2a, 5a, 8a, and 13a, and the identification data transmitted from the IC chips 2a, 5a, 8a, and 13a are received in response thereto. .

  The usage time calculation unit 19 of the control device 17 determines whether the manufacturing number of each replacement object received via the communication unit 18 matches the previous manufacturing number stored in the storage unit 20. For example, when it does not match the previous production number (in other words, when the exchange object is exchanged), the identification data (particularly the production number) received via the communication unit 18 is rewritten in the storage unit 20. Then, for example, the operation time of the compressor body 1 is integrated based on the signal output to the inverter 4 and the like, and this is associated with identification data (particularly, type information and manufacturing number) corresponding to the use time of the replacement object, and the storage unit 20 is stored. On the other hand, for example, when it coincides with the previous production number (in other words, when the object to be exchanged has not been exchanged), the previous use time stored in the storage unit 20 is read as an initial value, and the compressor is set to this initial value. The operation time of the main body 1 is added, and this is rewritten in the storage unit 20 as the usage time of the replacement object.

  The identification setting unit 21 of the control device 17 identifies whether or not each replacement object is a recommended product based on the identification information of each replacement object received via the communication unit 18, and a setting table stored in advance. The reference time of each replacement object is set based on the above. Specifically, as shown in the setting table shown in FIG. 3, for example, when the belt 2 is identified as a recommended product, the reference time is set to 12000 hours, and an alternative product (in other words, a product that is not a recommended product). ), The reference time is set to a shorter 10,000 hours. When the suction filter 5 is identified as a recommended product, the reference time is set to 8000 hours, and when the suction filter 5 is identified as an alternative product, the reference time is set to a shorter 7000 hours. When the separator element 8 is identified as a recommended product, its reference time is set to 6000 hours, and when it is identified as an alternative product, its reference time is set to a shorter 5000 hours. When the oil filter 13 is identified as a recommended product, the reference time is set to 6000 hours, and when the oil filter 13 is identified as an alternative product, the reference time is set to a shorter 4000 time. For example, when a replacement object that does not have an IC chip is attached to the air compressor, the identification setting unit 21 does not receive identification information or the like via the communication unit 18, so that the replacement object is a recommended product. It is determined that it is not.

  The determination unit 22 of the control device 17 compares the use time of each replacement object calculated by the use time calculation unit 19 with the reference time of each replacement object set by the identification setting unit 21. For example, when the usage time of the replacement object exceeds the reference time, a display command is output to the display control unit 23. In response to the display command, the display control unit 23 displays, for example, a message indicating the arrival of the replacement time together with the type of the replacement object on the display unit 24 (for example, a liquid crystal monitor).

  In the present embodiment configured as described above, the control device 17 identifies whether or not the replacement object is a recommended product based on the identification information received from the IC chip of the replacement object. Then, with respect to the use time of the replacement object identified as the recommended product, it is determined whether or not a first reference time set in advance has been exceeded, and the replacement object identified as not the recommended product. It is determined whether a second reference time set in advance so as to be shorter than the first reference time is exceeded. For example, when it is determined that the usage time of the replacement object identified as the recommended product has exceeded the first reference time, or the usage time of the replacement object identified as not the recommended product is the second When it is determined that the reference time has been exceeded, the arrival of the replacement time for the replacement object is displayed. In this way, in the present embodiment, it is possible to notify the user of the arrival of the replacement time by informing at the reference time (exchange time) corresponding to whether or not the replacement object is a recommended product. Therefore, even if the replacement object is not a recommended product, long-term use can be avoided and safety can be improved.

  In the first embodiment, the notification unit has been described by way of example of the display unit 24 that displays, for example, a message indicating the arrival of the replacement time, but is not limited thereto. That is, for example, a buzzer or a lamp may be used. Even in such a modification, the same effect as described above can be obtained.

  A second embodiment of the present invention will be described with reference to FIGS. In the present embodiment, when any one of a plurality of replacement object usage times exceeds a corresponding reference time, the operation capacity of the compressor is gradually reduced according to the excess size. It is a form. Note that in this embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted as appropriate.

  FIG. 4 is a block diagram illustrating a functional configuration related to operation control of the control device in the present embodiment. In FIG. 4, the control device 25 includes a communication unit 18, a usage time calculation unit 19, a storage unit 20, an identification setting unit 26, a determination unit 27, and an operation control unit 28.

  FIG. 5 is a flowchart showing the processing content related to the operation control of the control device 25. FIG. 6 is a diagram showing the operation control characteristics of the control device 25, and shows the relationship between the usage time of the replacement object and the target value of the discharge pressure.

  First, in step 100, the identification setting unit 26 is based on the identification information of each replacement object (specifically, the belt 2, the suction filter 5, the separator element 8, or the oil filter 13) received via the communication unit 18. Whether each replacement object is a recommended product is identified, and the reference time Ai and excess time Bi, Ci, Di (where Ai <Bi <Ci <) for each replacement object based on a pre-stored setting table Di) is set. Specifically, as shown in the setting table shown in FIG. 7, for example, when the belt 2 is identified as a recommended product, the reference time A1 = 12000 hours, the excess time B1 = 13000 hours, C1 = 14000 hours, D1 = When 15,000 hours are set, and it is identified as a substitute, the reference time A1 = 10000 hours, the excess time B1 = 11000 hours, C1 = 12000 hours, and D1 = 13000 hours are set so as to be shorter overall. When the suction filter 5 is identified as a recommended product, the reference time A2 = 8000 hours, the excess time B2 = 8500 hours, C2 = 9000 hours, and D2 = 9500 hours are identified and identified as an alternative product. In this case, the reference time A2 = 7000 hours, excess time B2 = 7500 hours, C2 = 8000 hours, and D2 = 8500 hours are set so as to be shorter overall. In addition, when the separator element 8 is identified as a recommended product, the reference time A3 = 6000 hours, the excess time B3 = 6500 hours, C3 = 7000 hours, and D3 = 7500 hours are set, and identified as an alternative product. In this case, the reference time A3 = 5000 hours, the excess time B3 = 5500 hours, C3 = 6000 hours, and D3 = 6500 hours are set so as to be shorter overall. Further, when the oil filter 13 is identified as a recommended product, the reference time A4 = 6000 hours, the excess time B4 = 6500 hours, C4 = 7000 hours, and D4 = 7500 hours are set, and the oil filter 13 is identified as an alternative product. In this case, the reference time A4 = 4000 hours, excess time B4 = 4250 hours, C4 = 4500 hours, and D4 = 4750 hours are set so as to be shorter overall.

  Then, the process proceeds to step 101, where the usage time calculator 19 uses the usage time Ti of each replacement object based on the operation time of the compressor body 1 (specifically, the usage time T1 of the belt 2 and the usage time of the suction filter 5). T2, use time T3 of the separator element 8, or use time T4 of the oil filter 13) is calculated.

  In step 102, the determination unit 27 compares the use time Ti of each replacement object calculated by the use time calculation unit 19 with the corresponding reference time Ai set by the identification setting unit 26, It is determined whether or not the usage time Ti of the replacement object is equal to or less than the corresponding reference time Ai. For example, if all the usage times Ti are equal to or less than the corresponding reference time Ai, the determination at step 102 is satisfied, and the routine proceeds to step 103. In step 103, the operation control unit 28 sets the target value of the discharge pressure to P1 in order to perform normal operation. Then, the deviation between the target value P1 of the discharge pressure and the detected value of the discharge pressure is calculated, and a rotation speed command signal generated based on the deviation is output to the inverter 4. Further, an upper limit value and a lower limit value of the discharge pressure are set on the basis of the target value P1 of the discharge pressure, and the suction throttle valve 6 is closed or opened based on these. On the other hand, when the use time Ti of any replacement object exceeds the corresponding reference time Ai in step 102, the determination is not satisfied and the process proceeds to step 104.

  In step 104, the determination unit 27 determines whether or not the usage time Ti of all the replacement objects is equal to or less than the corresponding excess time Bi. For example, if the usage time Ti of all the replacement objects is equal to or less than the corresponding excess time Bi, the determination in step 104 is satisfied, and the routine proceeds to step 105. In step 105, the operation control unit 28 sets the target value of the discharge pressure to P2 (where P2 <P1) in order to suppress the first-stage operation capacity. Then, the deviation between the target value P2 of the discharge pressure and the detected value of the discharge pressure is calculated, and the rotation speed command signal generated based on this is output to the inverter 4. Further, an upper limit value and a lower limit value of the discharge pressure are set on the basis of the target value P2 of the discharge pressure, and the suction throttle valve 6 is closed or opened based on these. On the other hand, if, for example, the usage time Ti of any replacement object exceeds the corresponding excess time Bi in step 104, the determination is not satisfied, and the routine proceeds to step 106.

  In step 106, the determination unit 27 determines whether or not the usage time Ti of all the replacement objects is equal to or less than the corresponding excess time Ci. For example, when the usage time Ti of all the replacement objects is equal to or less than the corresponding excess time Ci, the determination in step 106 is satisfied, and the routine proceeds to step 107. In step 107, the operation control unit 28 sets the target value of the discharge pressure to P3 (where P3 <P2) in order to suppress the second-stage operation capability. Then, a deviation between the target value P3 of the discharge pressure and the detected value of the discharge pressure is calculated, and a rotation speed command signal generated based on the deviation is output to the inverter 4. Further, an upper limit value and a lower limit value of the discharge pressure are set on the basis of the target value P3 of the discharge pressure, and the suction throttle valve 6 is closed or opened based on these. On the other hand, if, for example, the usage time Ti of any replacement object exceeds the corresponding excess time Bi in step 106, the determination is not satisfied, and the routine proceeds to step 108.

  In step 108, the determination unit 27 determines whether or not the usage time Ti of all the replacement objects is equal to or less than the corresponding excess time Di. For example, if the usage time Ti of all the replacement objects is equal to or less than the corresponding excess time Di, the determination in step 108 is satisfied, and the routine proceeds to step 109. In step 109, the operation control unit 28 sets the target value of the discharge pressure to P4 (where P4 <P3) in order to suppress the third-stage operation capability. Then, the deviation between the target value P4 of the discharge pressure and the detected value of the discharge pressure is calculated, and the rotation speed command signal generated based on this is output to the inverter 4. Further, an upper limit value and a lower limit value of the discharge pressure are set on the basis of the target value P4 of the discharge pressure, and the suction throttle valve 6 is closed or opened based on these. On the other hand, if, for example, the usage time Ti of any replacement object exceeds the corresponding excess time Di at step 108, the determination is not satisfied and the routine goes to step 110. In step 110, the operation control unit 28 stops the compressor main body 1.

  In the present embodiment configured as described above, the control device 25, as with the control device 17 of the first embodiment, performs the usage time Ti of the replacement object identified as the recommended product. It is determined whether or not a first reference time Ai set in advance is exceeded, and the usage time Ti of the replacement object identified as not a recommended product is shorter than the first reference time. It is determined whether or not a preset second reference time Ai has been exceeded. For example, when it is determined that the usage time Ti of any replacement object has exceeded the corresponding reference time Ai, the operating capacity of the compressor is suppressed in a stepwise manner in accordance with the excess amount. In this way, in the present embodiment, the operation capacity of the compressor is suppressed at the reference time (replacement time) corresponding to whether or not the replacement object is a recommended product, thereby allowing the user to recognize the replacement time. At the same time, it is possible to prompt the exchange of the exchange object. Therefore, even if the replacement object is not a recommended product, long-term use can be avoided and safety can be improved.

  In the second embodiment, the control device 25 may suppress the compressor operating capacity in stages by lowering the target value of the discharge pressure in stages from P1 → P2 → P3 → P4. Although described as an example, the present invention is not limited to this. That is, for example, as shown in FIG. 8, the maximum number of revolutions of the compressor body 1 controlled by the inverter 4 (in other words, the upper limit value of the variable control range of the number of revolutions) is gradually increased from N1 → N2 → N3 → N4. By lowering, the operation capacity of the compressor may be suppressed in stages. Further, for example, the operating capacity of the compressor may be suppressed in stages by lowering both the target value of the discharge pressure and the maximum rotation speed of the compressor body in stages. In these modified examples, the same effect as described above can be obtained.

  In the second embodiment, when the usage time Ti of any replacement object exceeds the corresponding reference time Ai, the control device 25 operates the compressor according to the excess amount. Although the case where the capacity is gradually reduced and the compressor main body 1 is stopped when the excess time Di is exceeded has been described as an example, the present invention is not limited thereto. That is, for example, the compressor body may be stopped when the usage time Ti of any replacement object exceeds the corresponding reference time Ai. Even in such a modification, the same effect as described above can be obtained.

  Although not specifically described in the second embodiment, the control device 25 may be configured to perform replacement time display control, similarly to the control device 17 of the first embodiment.

  A third embodiment of the present invention will be described with reference to FIGS. In the present embodiment, the total time is calculated using the usage times of the plurality of replacement objects as parameters, and the operation capacity of the compressor body is suppressed when the total time exceeds the reference time. Note that in this embodiment, the same parts as those in the second embodiment are denoted by the same reference numerals, and description thereof will be omitted as appropriate.

  FIG. 9 is a block diagram illustrating a functional configuration related to operation control of the control device according to the present embodiment. In FIG. 9, the control device 29 includes a communication unit 18, a usage time calculation unit 19, a storage unit 20, an identification setting unit 30, a comprehensive determination unit 31, and an operation control unit 28.

  FIG. 10 is a flowchart showing the processing contents related to the operation control of the control device in the present embodiment.

  First, in step 200, the identification setting unit 30 determines each replacement object (specifically, the belt 2, the suction filter 5, the separator element 8, and the like based on the identification information of each replacement object received via the communication unit 18. Whether or not the oil filter 13) is a recommended product is identified, and a weighting factor Ki for each replacement object is set based on a setting table stored in advance. Specifically, as in the setting table shown in FIG. 11, for example, when the belt 2 is identified as a recommended product, the weighting factor K1 is set to 0.8, and when the belt 2 is identified as a replacement product, Set the weighting factor K1 to a larger 2.0. When the suction filter 5 is identified as a recommended product, the weight coefficient K2 is set to 0.6, and when the suction filter 5 is identified as an alternative product, the weight coefficient K2 is set to a larger 1.0. When the separator element 8 is identified as a recommended product, the weight coefficient K3 is set to 0.8, and when the separator element 8 is identified as an alternative product, the weight coefficient K3 is set to a larger value of 2.0. When the oil filter 13 is identified as a recommended product, the weight coefficient K4 is set to 1.0, and when it is identified as an alternative product, the weight coefficient K4 is set to a larger value of 3.0.

  Then, the process proceeds to step 201, where the usage time calculation unit 19 uses the usage time Ti of each replacement object based on the operation time of the compressor body 1 (specifically, the usage time T1 of the belt 2 and the usage time of the suction filter 5). T2, use time T3 of the separator element 8, or use time T4 of the oil filter 13) is calculated.

  Then, the process proceeds to step 202, where the overall determination unit 31 multiplies the use time Ti of each replacement object calculated by the use time calculation unit 19 by the corresponding weighting factor Ki set by the identification setting unit 30 and adds them together. Calculate the total time. Then, it is determined whether or not the total time is equal to or less than a preset reference time At. For example, if the total time is equal to or less than the reference time At, the determination in step 202 is satisfied, the process proceeds to step 203, and the operation control unit 28 performs control so as to perform normal operation. On the other hand, for example, when the total time exceeds the reference time At, the determination in step 202 is not satisfied, and the routine proceeds to step 204.

  In step 204, the total determination unit 31 determines whether the total time is equal to or less than a preset excess time Bt (Bt> At). For example, when the total time is equal to or shorter than the reference time Bt, the determination in step 204 is satisfied, the process proceeds to step 205, and the operation control unit 28 performs control so as to suppress the driving ability in the first stage. On the other hand, for example, when the total time exceeds the reference time Bt, the determination in step 204 is not satisfied, and the routine proceeds to step 206.

  In step 206, the comprehensive determination unit 31 determines whether the total time is equal to or less than a preset excess time Ct (where Ct> Bt). For example, when the total time is equal to or shorter than the reference time Ct, the determination in step 206 is satisfied, the process proceeds to step 207, and the operation control unit 28 performs control so as to suppress the second-stage driving ability. On the other hand, for example, when the total time exceeds the reference time Ct, the determination in step 206 is not satisfied, and the routine proceeds to step 208.

  In step 208, the comprehensive determination unit 31 determines whether the total time is less than or equal to the preset excess time Dt (where Dt> Ct). For example, when the total time is equal to or shorter than the reference time Ct, the determination in step 208 is satisfied, the process proceeds to step 209, and the operation control unit 28 performs control so as to suppress the third-stage driving ability. On the other hand, for example, when the total time exceeds the excess time Dt, the determination in step 208 is not satisfied, the process proceeds to step 210, and the operation control unit 28 stops the compressor body 1.

  In the present embodiment configured as described above, the control device 29 multiplies the usage time Ti of the replacement object identified as the recommended product by a preset first weighting factor Ki. The usage time Ti of the replacement object identified as not a recommended product is multiplied by a second coefficient weight Ki set in advance so as to be larger than the first weight coefficient, and then multiplied by these coefficients Ki. The total time (Σ (Ki · Ti)) is calculated using the usage time of a plurality of replacement objects as a parameter, and it is determined whether or not the total time (Σ (Ki · Ti)) exceeds a preset reference time At. To do. For example, when it is determined that the total time (Σ (Ki · Ti)) exceeds the reference time At, the operation capacity of the compressor is suppressed stepwise in accordance with the excess. In this way, in the present embodiment, since the operation capacity of the compressor is suppressed when the total time calculated corresponding to whether or not the replacement object is a recommended product exceeds the reference time, It is possible to make the user recognize the arrival of the maintenance time and prompt the user to replace the replacement object. Therefore, even if the replacement object is not a recommended product, long-term use can be avoided and safety can be improved.

  In the third embodiment, the control device 29 has been described by taking as an example the case where the total time is obtained by multiplying the use time Ti of each replacement object by multiplying the weighting factor Ki, but is not limited thereto. Absent. That is, as long as the use time Ti of each replacement object multiplied by the weighting factor Ki is calculated as a parameter, another calculation formula may be used. Even in such a modification, the same effect as described above can be obtained.

  Further, although not particularly described in the third embodiment, the control device 29 may be configured to perform replacement time display control similarly to the control device 17 of the first embodiment.

  Further, although not particularly described in the first to third embodiments, the control device may transmit and write the usage time of the replacement object to the IC chip. In such a modification, for example, even when a used replacement object is newly attached to the air compressor, the control device acquires the past use time stored in the IC chip of the used replacement object. The use time can be calculated using this as an initial value.

  In the first to third embodiments, the control device receives the identification information stored in the IC chip of the replacement object, and the replacement object is a recommended product based on the received identification information. However, the present invention is not limited to this. That is, the control device may read a barcode or a hologram provided on the replacement object with a reader and identify whether or not the replacement object is a recommended product based on this. For an object to be exchanged (for example, lubricating oil) in which an IC chip, a barcode or the like cannot be directly provided, for example, an IC chip or barcode is attached to an accessory of the exchanged object (for example, a container for storing lubricating oil). May be provided. Further, for example, the control device may identify whether or not the replacement object is a recommended product by an input from a keyboard or the like. In these modified examples, the same effect as described above can be obtained.

  In the above description, the oil supply type air compressor that variably controls the rotation speed of the compressor body has been described as an application target of the present invention. However, the present invention is not limited to this. That is, for example, the present invention may be applied to an air compressor that operates with the rotation speed of the compressor main body fixed, or may be applied to an oil-free air compressor, for example. In these cases, the same effect as described above can be obtained.

DESCRIPTION OF SYMBOLS 1 Compressor main body 2 Belt 2a IC chip 3 Electric motor 4 Inverter 5 Suction filter 5a IC chip 8 Separator element 8a IC chip 13 Oil filter 13a IC chip 17 Control device (Use time calculation means, identification means, determination means, notification means)
25 Control device (usage time calculation means, identification means, determination means, operation control means)
29 Control device (usage time calculation means, identification means, determination means, operation control means)

Claims (2)

In an air compressor comprising a compressor main body that compresses air, and a plurality of types of replacement objects that are used together with the operation of the compressor main body and have different replacement times ,
And use time calculating means for calculating each time of use of the plurality of types of exchange objects based on the operating time of the compressor body,
The identification information of a plurality of types of exchange objects is stored in advance, and the identification information acquisition means for the acquisition request of the identification information to the IC chip provided on said plurality of types of exchange objects,
If there is a response of identification information to the acquisition request, it is determined whether or not the replacement object is a recommended product based on the identification information, and if there is no response itself, the replacement object is not identified as a recommended product. An identification means;
For the usage time of the replacement object identified as a recommended product, it is determined whether or not a first reference time preset in advance to be different depending on the type of the replacement object , A second time set in advance so as to be different depending on the type of the replacement object and shorter than the first reference time with respect to the use time of the replacement object identified as not a recommended product. Determining means for determining whether or not a reference time has been exceeded;
An air compressor comprising: an informing means for informing when it is determined that at least one of the use times of the plurality of types of replacement objects exceeds a corresponding reference time. 2. The air compressor according to claim 1, wherein the plurality of types of replacement objects include a belt that transmits power between the compressor body and an electric motor, and impurities in intake air that are provided on a suction side of the compressor body. suction filter for removing the lubricating oil supplied to the compressor body, any of the oil filter for removing impurities of the compressor separator element for separating the lubricating oil from the compressed air generated in the main body, and the lubricating oil 2 An air compressor comprising two or more .

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