A compressed air control device for a packaging machine

Abstract

This utility model discloses a compressed air control device for a packaging machine. It includes: a control unit and a relay; the first normally open contact of the relay is electrically connected to the signal terminal of the packaging machine, the second normally open contact is electrically connected to the compressed air control solenoid valve, and the first coil pin is electrically connected to the switch control terminal of the control unit; the compressed air signal acquisition terminal of the control unit is communicatively connected to the compressed air signal output terminal of the packaging machine; the operation signal acquisition terminal of the control unit is communicatively connected to the operation signal output terminal of the packaging machine. The technical solution of this utility model, by setting a control unit and a relay in the packaging machine and the compressed air device, and through the link between the control unit and the packaging machine, the relay, and the compressed air control device, can automatically monitor the operating status of the packaging machine and control the shutdown of the compressed air control device when the packaging machine stops, avoiding unnecessary energy consumption from continuous compressed air supply and reducing production costs.

Description

Technical Field

[0001] This utility model relates to the field of packaging machine technology, and in particular to a compressed air control device for a packaging machine. Background Technology

[0002] Currently, the main and auxiliary compressed air intakes of the GDX6S packaging machine are each controlled by a separate electric valve. The operation of the main intake requires manual control of the valves via buttons on the control panel. When the equipment is not running at night or during extended periods of inactivity, operators often forget to turn off the compressed air, resulting in its continuous operation. This continuous supply of compressed air consumes unnecessary energy and increases production costs. Utility Model Content

[0003] This invention provides a compressed air control device for a packaging machine to solve the problem of unnecessary energy waste caused by not shutting down the compressed air device in time in the prior art.

[0004] A compressed air control device for a packaging machine according to the present invention includes: a control unit and a relay;

[0005] The first normally open contact of the relay is electrically connected to the signal terminal of the packaging machine, the second normally open contact is electrically connected to the compressed air control solenoid valve, and the first coil pin is electrically connected to the switch control terminal of the control unit.

[0006] The compressed air signal acquisition terminal of the control unit is communicatively connected to the compressed air signal output terminal of the packaging machine; the operation signal acquisition terminal of the control unit is communicatively connected to the operation signal output terminal of the packaging machine.

[0007] Optionally, the control unit may also include a shift information receiver;

[0008] The shift receiving terminal is used to receive the running time information of the packaging machine.

[0009] Optionally, the control unit includes a decision subunit and a control subunit;

[0010] The compressed air signal acquisition terminal and the operation signal acquisition terminal are located on the judgment subunit; the switch control terminal is located on the control subunit.

[0011] The judgment result output terminal of the judgment subunit is communicatively connected to the judgment result receiving terminal of the control subunit.

[0012] Optionally, the control unit may also include a timing subunit;

[0013] The stop timing terminal of the timing subunit is communicatively connected to the operation signal output terminal of the packaging machine;

[0014] The stop time output terminal of the timing subunit is communicatively connected to the stop time receiving terminal of the judgment subunit.

[0015] Optionally, the packaging machine includes a main unit and auxiliary units;

[0016] The relay includes a first sub-relay and a second sub-relay;

[0017] The first normally open contact of the first sub-relay is electrically connected to the signal terminal of the host, the second normally open contact is electrically connected to the first compressed air control solenoid valve, and the first coil pin is electrically connected to the first switch control terminal of the control unit.

[0018] The first compressed air signal acquisition terminal of the control unit is communicatively connected to the compressed air signal output terminal of the host; the first operating signal acquisition terminal of the control unit is communicatively connected to the operating signal output terminal of the host.

[0019] The first normally open contact of the second sub-relay is electrically connected to the signal terminal of the auxiliary machine, the second normally open contact is electrically connected to the second compressed air control solenoid valve, and the first coil pin is electrically connected to the second switch control terminal of the control unit.

[0020] The second compressed air signal acquisition terminal of the control unit is communicatively connected to the compressed air signal output terminal of the auxiliary machine; the second operating signal acquisition terminal of the control unit is communicatively connected to the operating signal output terminal of the auxiliary machine.

[0021] Optionally, the packaging machine also includes a reset button;

[0022] The reset signal output terminal of the packaging machine is communicatively connected to the reset signal receiving terminal of the control unit.

[0023] Optionally, an indicator unit may also be included;

[0024] The indicator signal receiving end of the indicator unit is communicatively connected to the indicator signal output end of the control unit.

[0025] Optionally, a display unit may also be included:

[0026] The compressed air operation display terminal of the display unit is communicatively connected to the compressed air operation status output terminal of the control unit.

[0027] Optionally, the control unit may also include a first power supply terminal and a second power supply terminal;

[0028] The first power supply terminal is electrically connected to the positive terminal of the power supply, and the second power supply terminal is electrically connected to the negative terminal of the power supply; the second coil pin of the relay is electrically connected to the negative terminal of the power supply.

[0029] Optionally, the power supply voltage is 24V.

[0030] The technical solution of this utility model, by setting control units and relays in the packaging machine and compressed air device, and by linking the control unit with the packaging machine, relays and compression control device, can automatically monitor the operating status of the packaging machine, and control the shutdown of the compression control device when the packaging machine stops, thereby avoiding the unnecessary energy consumption of continuous compressed air supply and reducing production costs.

[0031] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this utility model, nor is it intended to limit the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a connection diagram of a compressed air control device according to an embodiment of the present utility model;

[0034] Figure 2 This is a connection diagram of a relay according to an embodiment of the present utility model;

[0035] Figure 3 This is a connection diagram of a control unit provided according to an embodiment of the present utility model. Detailed Implementation

[0036] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0037] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0038] Figure 1 This is a connection diagram of a compressed air control device according to an embodiment of the present invention. Figure 2 This is a connection diagram of a relay according to an embodiment of the present utility model. (In conjunction with...) Figure 1 and Figure 2 As shown, the compressed air control device includes: a control unit 1 and a relay K;

[0039] The first normally open contact a of relay K is electrically connected to the signal terminal b of packaging machine 3, the second normally open contact c is electrically connected to compressed air control solenoid valve 4, and the first coil pin d is electrically connected to the switch control terminal e of control unit 1.

[0040] The compressed air signal acquisition terminal f of the control unit 1 is communicatively connected to the compressed air signal output terminal g of the packaging machine 3; the operation signal acquisition terminal h of the control unit 1 is communicatively connected to the operation signal output terminal i of the packaging machine 3.

[0041] The control unit 1 can be a programmable logic controller. The relay K can be a device that controls the circuit to open or close using the principle of electromagnetic induction.

[0042] The packaging machine 3 can be used for packaging cigarettes, and the compressed air device can be a component that assists in cigarette packaging. The packaging machine 3 and the compressed air device are independent of each other. The compressed air control solenoid valve 4 can be a component that controls the opening and closing of the compressed air device. The first normally open contact a of the relay K is electrically connected to the signal terminal b of the packaging machine 3, and the second normally open contact c is electrically connected to the compressed air control solenoid valve 4, so that the opening or closing of the relay K can control the opening and closing of the compressed air control solenoid valve 4, thereby controlling the start and stop of the compressed air device. The first coil pin d of the relay K is electrically connected to the switch control terminal e of the control unit 1, and the control unit 1 can control the opening and closing of the relay K through the switch control terminal e.

[0043] The compressed air signal acquisition terminal f of control unit 1 can be used to acquire the working signal of the compressed air device and is communicatively connected to the compressed air signal output terminal g of packaging machine 3. The compressed air signal output terminal g can input the working signal of the compressed air device to the compressed air signal acquisition terminal f in real time. The operation signal acquisition terminal h can be used to acquire the operation signal of packaging machine 3. Since packaging machine 3 and compressed air device work independently, when packaging machine 3 stops running, compressed air device may not necessarily be turned off. Therefore, control unit 1 receives the operation signal from operation signal output terminal i based on operation signal from operation signal acquisition terminal h, and controls compressed air device to turn off based on operation signal of packaging machine 3 and working signal of compressed air device.

[0044] Specifically, control unit 1 collects the working signal from compressed air signal output terminal g and the running signal from running signal output terminal i. When packaging machine 3 stops running but compressed air device does not stop running, control unit 1's switch control terminal e controls relay K to disconnect, thereby disconnecting the circuit between compressed air control solenoid valve 4 and compressed air control device, and thus shutting down compressed air control device.

[0045] The technical solution of this utility model embodiment is to set a control unit 1 and a relay K in the packaging machine 3 and the compressed air device. Through the connection between the control unit 1 and the packaging machine 3, the relay K and the compression control device, the operating status of the packaging machine 3 can be automatically monitored, and the compression control device can be turned off when the packaging machine 3 stops. This avoids the unnecessary energy consumption of continuous compressed air supply and reduces production costs.

[0046] Optional, combined Figure 1 and Figure 2 As shown, the control unit 1 also includes a shift information receiving terminal j;

[0047] The shift receiving terminal is used to receive the running time information of packaging machine 3.

[0048] The operating shift information receiving terminal j can be used to receive the operating shift information of packaging machine 3, that is, the operating time of packaging machine 3. During the production process, the operating time of packaging machine 3 is generally a fixed time. Control unit 1 can collect and ensure the operating time information, and control the compressed air device to start or stop according to the operating time information, the operating signal of packaging machine 3 and the working signal of compressed air device.

[0049] For example, the operating shift information receiving terminal j of the control unit 1 collects the operating time information of the packaging machine 3 in real time, and the operating signal acquisition terminal h collects the operating signal of the packaging machine 3 in real time, and at the same time collects the working signal of the compressed air device. If it is not within the operating time of the packaging machine 3 and the packaging machine 3 stops operating, while the compressed air device continues to work, the control unit 1 controls the relay K to turn off the compressed air device. If it is within the operating time of the packaging machine 3 and the packaging machine 3 continues to operate but the compressed air device is not started, the control unit 1 controls the relay K to turn on the compressed air device.

[0050] The technical solution of this utility model embodiment is to set up a shift signal receiving terminal in the control unit 1 so that the control unit 1 can receive the running time information of the packaging machine 3 in real time, and then further combine the running time information of the packaging machine 3 to control the working status of the compressed air device, so as to achieve seamless connection with production scheduling.

[0051] Optional, Figure 3 This is a connection diagram of a control unit according to an embodiment of the present utility model, combined with... Figure 1 , Figure 2 and Figure 3 As shown, the control unit 1 includes a judgment subunit 11 and a control subunit 12;

[0052] The compressed air signal acquisition terminal f and the operation signal acquisition terminal h are set on the judgment subunit 11; the switch control terminal e is on the control subunit 12;

[0053] The judgment result output terminal of the judgment subunit 11 is communicatively connected to the judgment result receiving terminal of the control subunit 12.

[0054] The judgment subunit 11 can be used to receive signals and perform logical judgments, while the control subunit 12 can be used to output corresponding control signals based on the results of the logical judgments. The judgment result output terminal of the judgment subunit 11 is communicatively connected to the judgment result receiving terminal of the control subunit 12, and the control subunit 12 controls the opening and closing of the compressed air device based on the results output by the judgment subunit 11.

[0055] Specifically, the compressed air signal acquisition terminal f and the operation signal acquisition terminal h are set on the judgment subunit 11 to receive the operation signal and the working signal of the compressed air device, and make a judgment based on the operation signal and the working signal, and output the judgment result signal to the control unit 1. The switch control terminal e is on the control subunit 12. The control subunit 12 controls the switch control terminal e to output a signal according to the judgment result signal to control the working state of the relay K.

[0056] The technical solution of this utility model embodiment, by setting a judgment subunit 11 and a control subunit 12 in the control unit 1, connects the judgment subunit 11 and the control subunit 12 to complete the reception, judgment and processing of signals, thus ensuring the normal operation of the compressed air control device of the packaging machine 3.

[0057] Optional, combined Figure 1 , Figure 2 and Figure 3 As shown, the control unit 1 also includes a timing subunit 13;

[0058] The stop timing terminal of the timing subunit 13 is communicatively connected to the running signal output terminal i of the packaging machine 3;

[0059] The stop time output terminal of the timing subunit 13 is communicatively connected to the stop time receiving terminal of the judgment subunit 11.

[0060] The timing subunit 13 can be used to calculate the downtime of the packaging machine 3. The downtime timing terminal of the timing subunit 13 is communicatively connected to the operation signal output terminal i of the packaging machine 3. The timing subunit 13 receives the operation signal of the packaging machine 3 in real time, starts timing when it does not receive the operation signal of the packaging machine 3, calculates the downtime of the packaging machine 3, and transmits the downtime signal to the judgment subunit 11.

[0061] Specifically, during the running time of packaging machine 3, if packaging machine 3 stops running, the timing subunit 13 calculates the downtime of packaging machine 3, and the judgment subunit 11 determines that when the downtime reaches the preset time, the control relay K is disconnected and the compressed air device is turned off.

[0062] The technical solution of this utility model embodiment is to set a timing subunit 13 in the control unit 1 so that the control unit 1 can calculate the downtime of the packaging machine 3. When the downtime is too long, the compressed air device is controlled to shut down, further reducing unnecessary energy waste.

[0063] Optional, combined Figure 1 and Figure 2 As shown, the packaging machine 3 includes a main unit 31 and an auxiliary unit 32;

[0064] Relay K includes a first sub-relay K1 and a second sub-relay K2;

[0065] The first normally open contact a of the first sub-relay K1 is electrically connected to the signal terminal b of the host 31, the second normally open contact c is electrically connected to the first compressed air control solenoid valve 41, and the first coil pin d is electrically connected to the first switch control terminal e1 of the control unit 1.

[0066] The first compressed air signal acquisition terminal f of the control unit 1 is communicatively connected to the compressed air signal output terminal g of the host 31; the first operating signal acquisition terminal h of the control unit 1 is communicatively connected to the operating signal output terminal i of the host 31.

[0067] The first normally open contact a of the second sub-relay K2 is electrically connected to the signal terminal b of the auxiliary machine 32, the second normally open contact c is electrically connected to the second compressed air control solenoid valve 42, and the first coil pin d is electrically connected to the second switch control terminal e2 of the control unit 1.

[0068] The second compressed air signal acquisition terminal f of the control unit 1 is communicatively connected to the compressed air signal output terminal g of the auxiliary machine 32; the second operation signal acquisition terminal h of the control unit 1 is communicatively connected to the operation signal output terminal i of the auxiliary machine 32.

[0069] The main unit 31 and the auxiliary unit 32 are each connected to a relay K, and the first sub-relay K1 and the second sub-relay K2 are respectively connected to the control unit 1.

[0070] For example, the operating shift information receiving terminal j of the control unit 1 collects the operating time information of the host 31 in real time, and the first operating signal acquisition terminal h collects the operating signal of the host 31 in real time, and at the same time collects the working signal of the compressed air device of the host 31. If it is not within the operating time of the host 31 and the host 31 stops operating, while the compressed air device of the host 31 continues to work, the control unit 1 controls the first relay K to turn off the compressed air device of the host 31. If it is within the operating time of the host 31, the host 31 continues to operate but the compressed air device of the host 31 is not started, the control unit 1 controls the first relay K to turn on the compressed air device of the host 31.

[0071] Similarly, the operating shift information receiving terminal j of control unit 1 collects the operating time information of auxiliary machine 32 in real time, and the second operating signal acquisition terminal h collects the operating signal of auxiliary machine 32 in real time, and at the same time collects the working signal of the compressed air device of auxiliary machine 32. If it is not within the operating time of auxiliary machine 32 and auxiliary machine 32 stops operating, while the compressed air device of auxiliary machine 32 continues to work, control unit 1 controls the second relay K to shut down the compressed air device of auxiliary machine 32. If it is within the operating time of auxiliary machine 32, and auxiliary machine 32 continues to operate but the compressed air device of auxiliary machine 32 is not started, control unit 1 controls the second relay K to turn on the compressed air device of auxiliary machine 32.

[0072] In this embodiment of the invention, when the packaging machine 3 includes a main unit 31 and an auxiliary unit 32, a first relay K and a second relay K are respectively assigned. The first relay K and the second relay K are simultaneously connected to the control unit 1 and controlled independently, which avoids the unnecessary energy consumption of continuous compressed air supply and reduces production costs.

[0073] Optional, combined Figure 1 and Figure 2 As shown, the packaging machine 3 also includes a reset button 5;

[0074] The reset signal output terminal m of packaging machine 3 is communicatively connected to the reset signal receiving terminal n of control unit 1.

[0075] The reset button 5 can be manually operated. The reset button 5 is located on the packaging machine 3. When the operator triggers the reset button 5, the reset signal output terminal m outputs a reset signal to the reset signal receiving terminal n, which in turn causes the control unit 1 to close the relay K and activate the compressed air device.

[0076] The technical solution of this utility model embodiment, by setting a reset button 5, ensures that the staff can trigger the reset button 5 to control the compressed air device to start as needed.

[0077] Optionally, an indicator unit may also be included;

[0078] The indicator signal receiving end of the indicator unit is communicatively connected to the indicator signal output end of the control unit 1.

[0079] The indicator unit can be used to indicate the working status of the compressed air device. Whether the compressed air device is on or off, the indicator unit can display the status based on the indicator signal received by the indicator signal receiver.

[0080] For example, the indicator unit can be an indicator light. When the compressed air device is off, the indicator unit displays a red light, and when the compressed air device is on, the indicator unit displays a green light. The operator can understand the start and stop status of the compressed air device by observing the indicator unit, thereby improving the functionality of the compressed air control device.

[0081] Optionally, a display unit may also be included:

[0082] The compressed air operation display terminal of the display unit is communicatively connected to the compressed air operation status output terminal of the control unit 1.

[0083] The display unit can be a display screen. The compressed air working display terminal of the display unit is communicatively connected to the compressed air working status output terminal of the control unit 1, which can display the working status of the compressed air device in real time, making it convenient for staff to view and improving the functionality of the compressed air control device.

[0084] Optional, combined Figure 1 and Figure 2 As shown, the control unit 1 also includes a first power supply terminal o and a second power supply terminal p;

[0085] The first power supply terminal o is electrically connected to the positive terminal of the power supply, and the second power supply terminal p is electrically connected to the negative terminal of the power supply; the second coil pin of the relay K is electrically connected to the negative terminal of the power supply.

[0086] The first power supply terminal o is electrically connected to the positive terminal of the power supply, and the second power supply terminal p is electrically connected to the negative terminal of the power supply, providing power to the control unit 1. The second coil pin of the relay K is electrically connected to the negative terminal of the power supply, facilitating the supply of power to the coil of the relay K and controlling the opening and closing of the relay K.

[0087] In some embodiments, the power supply voltage is 24V to ensure the normal operation of the control unit.

[0088] The technical solution of this utility model embodiment has the following advantages:

[0089] First, it has a high degree of automation, reducing human intervention.

[0090] Intelligent timing control: The control unit automatically collects production shift information and starts and stops the compressed air device precisely according to the preset time, without the need for manual operation of the switch;

[0091] Dynamically responds to production plans: It links with the workshop data acquisition system to automatically adapt to scenarios such as mid-shift shutdown and early-shift resumption of production, achieving seamless integration with production scheduling.

[0092] II. Significant Energy Saving and Consumption Reduction

[0093] Avoid idle waste: Automatically cut off the compressed air device after the equipment stops running empty during the middle shift to eliminate energy leakage during non-production periods.

[0094] On-demand gas supply: When the main unit / auxiliary unit is detected to have been shut down for a long time but still has a compressed air signal, the gas supply will be cut off immediately to prevent invalid energy supply;

[0095] Pre-supply of gas: Gas is supplied in advance according to plan before the early shift to ensure production preparation and avoid the waste of supplying gas all night.

[0096] III. Multiple testing methods ensure reliability

[0097] Multi-signal collaborative judgment: comprehensively detect equipment operation signals, compressed air signals and time conditions to avoid misoperation (such as air interruption during equipment operation);

[0098] Fail-safe mechanism: The air cut-off operation is only performed when the equipment stops and a compressed air signal is available, ensuring production safety.

[0099] IV. Convenient and efficient operation

[0100] One-click gas supply restoration: When the device restarts, simply press the reset button to automatically restore the gas supply, simplifying the operation process and improving efficiency;

[0101] No manual inspection required: Automatically monitors equipment status, replacing manual checks to ensure compressed air is turned off, reducing labor intensity.

[0102] V. Data Integration and Scalability

[0103] Information management: Connected to the workshop data acquisition system, it facilitates energy consumption statistics and analysis, providing data support for production optimization;

[0104] Flexible adaptation to different scenarios: The control unit logic is adjustable, making it suitable for different shift schedules or new equipment, and it has strong scalability.

[0105] It should be understood that the various forms of the process shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this utility model can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this utility model can be achieved, and this is not limited herein.

[0106] The specific embodiments described above do not constitute a limitation on the scope of protection of this utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A compressed air control device for a packaging machine, characterized in that, include: Control unit and relay; The first normally open contact of the relay is electrically connected to the signal terminal of the packaging machine, the second normally open contact is electrically connected to the compressed air control solenoid valve, and the first coil pin is electrically connected to the switch control terminal of the control unit. The compressed air signal acquisition terminal of the control unit is communicatively connected to the compressed air signal output terminal of the packaging machine; the operation signal acquisition terminal of the control unit is communicatively connected to the operation signal output terminal of the packaging machine.

2. The compressed air control device according to claim 1, characterized in that, The control unit also includes a shift information receiving terminal; The shift information receiving terminal is used to receive the operating time information of the packaging machine.

3. The compressed air control device according to claim 1, characterized in that, The control unit includes a judgment subunit and a control subunit; The compressed air signal acquisition terminal and the operation signal acquisition terminal are located on the judgment subunit; the switch control terminal is located on the control subunit. The judgment result output terminal of the judgment subunit is communicatively connected to the judgment result receiving terminal of the control subunit.

4. The compressed air control device according to claim 3, characterized in that, The control unit also includes a timing subunit; The stop timing terminal of the timing subunit is communicatively connected to the operation signal output terminal of the packaging machine; The stop time output terminal of the timing subunit is communicatively connected to the stop time receiving terminal of the judgment subunit.

5. The compressed air control device according to claim 1, characterized in that, The packaging machine includes a main unit and an auxiliary unit; The relay includes a first sub-relay and a second sub-relay; The first normally open contact of the first sub-relay is electrically connected to the signal terminal of the host, the second normally open contact is electrically connected to the first compressed air control solenoid valve, and the first coil pin is electrically connected to the first switch control terminal of the control unit. The first compressed air signal acquisition terminal of the control unit is communicatively connected to the compressed air signal output terminal of the host; the first operating signal acquisition terminal of the control unit is communicatively connected to the operating signal output terminal of the host. The first normally open contact of the second sub-relay is electrically connected to the signal terminal of the auxiliary machine, the second normally open contact is electrically connected to the second compressed air control solenoid valve, and the first coil pin is electrically connected to the second switch control terminal of the control unit. The second compressed air signal acquisition terminal of the control unit is communicatively connected to the compressed air signal output terminal of the auxiliary machine; the second operating signal acquisition terminal of the control unit is communicatively connected to the operating signal output terminal of the auxiliary machine.

6. The compressed air control device according to claim 1, characterized in that, The packaging machine also includes a reset button; The reset signal output terminal of the packaging machine is communicatively connected to the reset signal receiving terminal of the control unit.

7. The compressed air control device according to claim 1, characterized in that, It also includes an indicator unit; The indicator signal receiving end of the indicator unit is communicatively connected to the indicator signal output end of the control unit.

8. The compressed air control device according to claim 1, characterized in that, It also includes a display unit: The compressed air operation display terminal of the display unit is communicatively connected to the compressed air operation status output terminal of the control unit.

9. The compressed air control device according to claim 1, characterized in that, The control unit also includes a first power supply terminal and a second power supply terminal; The first power supply terminal is electrically connected to the positive terminal of the power supply, and the second power supply terminal is electrically connected to the negative terminal of the power supply; the second coil pin of the relay is electrically connected to the negative terminal of the power supply.

10. The compressed air control device according to claim 9, characterized in that, The power supply voltage is 24V.

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