KR20060086253A - Control method of vacuum packer - Google Patents

Abstract

The disclosed method of manufacturing a vacuum packaging machine includes a method of controlling a vacuum means and a sealing means in a microcomputer by measuring a vacuum member pressure of a vacuum packaging machine;

The microcomputer reads the current or voltage change depending on whether or not the vacuum means is loaded and judges whether the vacuum is detected. If it is determined as vacuum, the vacuum means is stopped in the vacuum mode, and in the vacuum / sealing, the sealing means is operated for a sealing time. After stopping with the vacuum means is characterized in that.

According to the above configuration, amplification of the voltage that changes very low depending on the load of the vacuum pump, and at the same time to remove the noise to enable the microcomputer to perform a high reliability and safe operation, by dividing the vacuum degree in several stages, each state lamp You can visually check the vacuum progress level by operating.

Vacuum packaging machine, current fluctuation, voltage fluctuation, precision control, vacuum pump, load

Description

Control method of vacuum packer {Control method of vacuum packer}

1 is a graph showing the relationship between the degree of vacuum and current characteristics of a vacuum pump to help the understanding of the present invention,

2 is a schematic configuration diagram of a vacuum packaging machine applied to the present invention;

3 is a control block diagram around a microcomputer forming a core of the main controller shown in FIG. 2;

4 is a detailed configuration diagram of the pump driving circuit and the amplifier / filter circuit shown in FIG.

5 is a control flowchart of a vacuum packaging machine according to an embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

10: power supply unit 20: main control unit

30: vacuum switch 40: vacuum / sealed switch

50: setting switch 60: status lamp

70: heating assay 80: vacuum pump

The present invention relates to a control method of a vacuum packaging machine, and more particularly, to read a change value of a current flowing in a vacuum pump during a load or no load operation of the vacuum pump and convert it into a voltage to determine whether the vacuum is a change in voltage and The present invention relates to a method of controlling a vacuum pump and a heater (heating assay) according to a variation amount.

In general, most foodstuffs or foods that are susceptible to deterioration are distributed in vacuum-packed form in paper or vinyl packaging for easy hygiene and handling, and the vacuum-packed contents are not opened in stores or homes. It will be stored and used for a long time safely.

In addition, in order to store the contents remaining after opening the packaging bag and taking out the contents or eating food, the lid is closed in a separate container, or the contents are left after the contents are opened and the packaging bags are left. Fold the open part of the bag and keep it.

However, the contents contained in the package are easily deteriorated by the microorganisms in the air, and when the door of the refrigerator containing the container with the remaining contents is opened, the smell of the contents is hindered to cause a pleasant kitchen environment. .

Due to this problem, a simple vacuum packaging machine that can easily vacuum-pack foods opened from vacuum packaging or fruits and vegetables requiring long-term storage has been developed and used in general homes or businesses.

Such a vacuum packaging machine includes a vacuum pump for sucking up and down the case and air to vacuum the inside of the vacuum wrapping paper, sealing means for temporarily sealing the opening of the vacuum wrapping paper, and heat-sealing the opening portion of the vacuumized vacuum wrapping paper. It consists of a heater to seal, and controls the vacuum pump and the heater in accordance with the vacuum pressure in the vacuum packaging.

At this time, the vacuum pressure is measured by using a pressure sensor. As the pressure sensor, a mechanical pressure sensor and a digital electronic pressure sensor are used.

By the way, the mechanical pressure sensor is inexpensive, but can not accurately measure the vacuum pressure, the reliability is low, the electronic pressure sensor can accurately measure the vacuum pressure, but there was a problem expensive.

In addition, the control method of the conventional vacuum packaging machine can be properly controlled in the case of a vacuum packaging paper that goes through the vacuum / sealing process, but could not be properly controlled in the case of a vacuum container that passes only the vacuum process, until the operation of the vacuum pump stops Indeed, it is not possible to visually see how much vacuum has been done.

Accordingly, the present applicant has filed an application for the control method of the vacuum packaging machine for determining whether the vacuum is read by using the microcomputer's A / D converter function to read the voltage that changes according to the load of the vacuum pump during the operation of the vacuum pump (application number 2003-77258).

The patent is a control method using a voltage up phenomenon of the transformer, the method using the voltage rise effect of the transformer has a disadvantage that it is possible only in the power supply using the transformer.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems and an object thereof is to provide a control method of a vacuum packaging machine applicable to any power source regardless of a transformer type or an SMPS type by using a change value of a current flowing in a vacuum pump. .

Another object of the present invention is to amplify a voltage that changes very low depending on the load of the vacuum pump and to remove noise to enable the microcomputer to perform high reliability and safe operation, and to divide the vacuum degree into several steps for each step. The present invention provides a control method of a vacuum packaging machine that can visually check the degree of vacuum progress by operating a status lamp.

Other objects and advantages of the invention will be described below and will be appreciated by the embodiments of the invention. Further objects and advantages of the invention may be realized by the means and combinations indicated in the claims.

The control method of the vacuum packaging machine according to an embodiment of the present invention for achieving the above object is a method for controlling the vacuum means and the sealing means in the microcomputer by measuring the pressure of the vacuum member of the vacuum packaging machine;

The microcomputer reads the current or voltage change depending on whether the vacuum means is loaded or not and determines whether or not the vacuum is detected. In the vacuum mode, the vacuum means is stopped, and in the vacuum / sealing, the sealing means is operated for a sealing time. After stopping with the vacuum means is characterized in that.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Prior to this, the terms or words used in the present specification and claims should not be construed as being limited to the ordinary or dictionary meanings, and the inventors properly define the concept of terms in order to explain their invention in the best way. It should be interpreted as meaning and concept corresponding to the technical idea of the present invention based on the principle that it can.

Therefore, the configuration shown in the embodiments and drawings described herein are only one of the most preferred embodiments of the present invention and do not represent all of the technical idea of the present invention, various equivalents that may be substituted for them at the time of the present application It should be understood that there may be water and variations.

1 is a graph showing the relationship between the vacuum degree and the current characteristics of the vacuum pump to help the understanding of the present invention.

In Fig. 1, section 1 is a current when the vacuum pump is not loaded during operation, and is a current during operation of the vacuum pump when the vacuum package or the vacuum container starts to be evacuated.

Section is the current when the vacuum pump is under load while the vacuum pump is in operation.

(3) The section is the current when the vacuum pump is subjected to full load during operation. It is the current during the operation of the vacuum pump after the vacuum inside the vacuum wrapping paper or the vacuum container is finished.

The present invention can be implemented without an electronic sensor as a method of controlling by setting the vacuum pressure step by step by using the current characteristics of the vacuum pump that could not be implemented by the conventional mechanical sensor.

2 is a schematic configuration diagram of a vacuum packaging machine applied to the present invention.

In the present invention, the vacuum mode is a mode in which only the inside of the vacuum member is vacuumed, which corresponds to a case where the vacuum member is a vacuum container that does not require sealing.

The vacuum / sealing mode is a mode in which the inside of the vacuum member is vacuumed and sealed by thermal fusion, and this is the case where the vacuum member is a plastic pack (vacuum wrapping paper) dedicated to a vacuum packaging machine.

The power supply unit 10 converts the input AC voltage into a voltage required for the operation of the vacuum packaging machine and outputs it.

The vacuum switch 30 is a switch for selecting a vacuum mode and when the vacuum switch is turned on, the vacuum pump 80 operates to vacuum the inside of the vacuum container.

The vacuum / sealing switch 40 is a switch for selecting a vacuum / sealing mode. When the vacuum / sealing switch is turned on, the vacuum pump 80 and the heating assay 70 operate to vacuum and seal the inside of the vacuum wrapping paper.

The setting switch 50 is a switch for determining the sealing time in the vacuum / sealing mode. In the present invention, the setting switch 50 includes two DIP switches, and the sealing time is determined by a combination of 0 and 1 of the switch. .

Table 1 below is a table showing the examples.

The heating assembly 70 heat seals the opened portion of the vacuum wrapper in a vacuum / sealed mode when the vacuum is finished.

The vacuum pump 80 draws the vacuum inside the vacuum wrapping paper or the vacuum container to the outside by the pumping operation.

The status lamp 60 displays the progress of the vacuum and the operation state of the vacuum pump 80, the heating assay 70, and the power supply unit 10 by lighting or blinking for each color.

The main control unit 20 periodically reads the current flowing in the vacuum pump 80 and converts it into a voltage to determine whether the vacuum is present, and determines whether the vacuum mode or the vacuum / sealing mode is performed according to whether the switches 30 and 40 are turned on. In the vacuum mode, the operation of the vacuum pump 80 is controlled. In the vacuum / sealing mode, the operation of the vacuum pump 80 and the heating assay 70 is controlled, but only during the sealing time set by the setting switch 50. The assay 70 is operated.

FIG. 3 is a control block diagram around a microcomputer that forms the core of the main controller shown in FIG. 2.

The operating voltage of the vacuum packaging machine converted through the power supply unit 10 is input to the microcomputer 21.

The clock generation circuit 26 periodically generates a clock necessary for the operation of the microcomputer 21, and the microcomputer 21 calculates the time by counting the number of clock generations.

The heater driving circuit 22, the pump driving circuit 23, and the lamp driving circuit 24 drive the heating assay 70, the vacuum pump 80, and the state lamp 60 by the control signal of the microcomputer 21. To stop or stop.

FIG. 4 is a detailed configuration diagram of the pump driving circuit and the amplifier / filter circuit shown in FIG. 3.

The amplification / filter circuit 27 amplifies a voltage that changes to a low voltage (24 mV to 30 mV) according to the load of the vacuum pump 80 by about 100 times using the OP AMP and operates on the characteristics of the vacuum pump 80. The noise generated during the operation is removed so that the clean voltage can be read by the microcomputer 21.

Looking at the operating point of the circuit it can be seen the relationship between the current flowing in the vacuum pump 80, the voltage according to the current change and the amplified voltage amplified voltage.

Table 2 below shows the above relationship.

As shown in Table 2, the microcomputer can determine whether or not the vacuum by using a change in the current or voltage depending on the presence or absence of a load during the operation of the vacuum pump.

In more detail, after reading the voltage of the AV point shown in FIG. 4 during the operation of the first vacuum pump 80 through the A / D converter port of the microcomputer 21 within a short time (about 0.1 to 0.2 seconds), Subtract a certain voltage value corresponding to the desired vacuum pressure to make a reference value (BASE_DATA) as a reference for judging whether or not the vacuum value to the read voltage value.

The microcomputer 21 stores the subtracted value in a register (temporary memory), which is not shown as a reference value (BASE_DATA), and continuously reads the voltage at the AV point and compares it with the BASE_DATA, which is made in advance, to read the BASE_DATA. If smaller, it is considered vacuum.

The microcomputer 21 generates a control signal for stopping the operation of the vacuum pump 80 or generating a control signal for operating the heating assay 70 when determined as a vacuum.

In addition, in the present invention, it is possible to control the vacuum degree which was only controllable by the electronic pressure sensor in several stages. The above-described BASE_DATA is divided into several stages and stored in a register (temporary memory device).

For example, when a five-stage vacuum degree of BASE_DATA1 to BASE_DATA5 is created, the voltage at the AV point is continuously read, and then the respective BASE_DATA1, BASE_DATA2,... After comparing with BASE_DATA5, it is also possible to control the status lamp 60 indicating the degree of vacuum progress.

If the vacuum level is set in step 3, the operation of the vacuum pump 80 is continued until it is smaller than BASE_DATA3. If the read value is smaller than BASE_DATA3, the operation of the vacuum pump 80 is stopped or the heating assay 70 is operated. Generates and outputs a control signal.

As such, by dividing the vacuum degree into multiple stages, the state lamp 60 may be operated in each stage to visually recognize the degree of vacuum progression.

The operation switch circuit 28 operates when the vacuum switch 30 or the vacuum / sealing switch 40 is turned on to transmit the signal to the microcomputer 21, and the microcomputer 21 uses the signal to select whether the vacuum mode or the vacuum / Determine if in sealing mode.

Reference numeral 25 denotes a reset circuit, and 29 denotes a sealing time setting circuit that operates when the setting switch 50 is turned on to set the sealing time.

5 is a control flowchart of a vacuum packaging machine according to an embodiment of the present invention.

In the microcomputer 21, a predetermined voltage value which is subtracted from the sealing time and the operating voltage is set in advance.

In the above configuration, when AC power is supplied to the vacuum packaging machine, the DC voltage rectified through the power supply unit 10 is input to the microcomputer 21, and the microcomputer 21 drives the lamp driving circuit 24 to generate the status lamp 60. By lighting (for example, green) to inform the user that the standby state (S402).

In the standby state, the microcomputer 21 monitors whether the signal of the vacuum / sealing switch 40 is input to determine whether the vacuum / sealing mode is in operation S404, and if the vacuum / sealing mode is not, the signal of the vacuum switch 30 is returned. It is determined whether or not the vacuum mode by monitoring the input (S406).

Here, the vacuum / sealing mode is a mode in which the vacuum packaging paper is vacuumed and sealed by heat fusion, and the vacuum mode is a mode in which the vacuum container is vacuumed.

If it is determined that the vacuum / sealed mode, the microcomputer 21 drives the pump driving circuit 23 and the lamp driving circuit 24 to operate the vacuum pump 80 while simultaneously blinking the status lamp 60 (for example, orange color). Inform the user that the vacuum pump 80 is operating (S410).

The weak voltage applied to the vacuum pump 80 is amplified by the amplifier / filter unit 27 and the noise is removed and input to the A / D converter port of the microcomputer 21.

At this time, the microcomputer 21 reads the operating voltage of the vacuum pump 80 through the A / D converter port in a short time (0.1 to 0.2 seconds) (S412), and then subtracts a certain voltage value from the operating voltage to obtain a reference voltage ( BASE_DATA) is stored in a register which is a temporary memory device (S413).

Thereafter, the microcomputer 27 measures the new operating voltage of the vacuum pump 80 (S414), and compares the new operating voltage with the reference voltage BASE_DATA stored in the register (S415).

When the new operating voltage is smaller than the reference voltage, the vacuum is in a vacuum state, so that the heater driving circuit 22 and the lamp driving circuit 24 are driven to seal by heat fusion, and the heating assay 70 is operated at the same time. By flashing 60 (for example, in red), the user is informed that the vacuum pump 80 and the heating assay 70 are in operation (S416).

If less than the new reference voltage is in a vacuum state and performs step S414.

The microcomputer 21 counts the number of clocks generated by the clock generation circuit 26 to determine whether the sealing time set by the setting switch 50 has elapsed (S417), and if so, the vacuum pump 80 and the heating assay ( The operation of 70 is stopped and the status lamp 60 is turned on (for example, in green) to inform the user of the standby state.

If the sealing time has not passed, step S416 is performed.

By performing the above steps, the vacuum and sealing of the vacuum package is completed.

Next, step S425 in step S420 performed in the case of the vacuum mode in step S406 is the same as step S415 in step S410 of the vacuum / sealing mode will be omitted here.

Since the sealing is not necessary in the vacuum mode after step S425, when the inside of the vacuum machine is determined to be in a vacuum state in step S425, the microcomputer 21 stops the operation of the vacuum pump 80 and turns on the status lamp 60 (for example, (Green) to alert the user that it is idle.

By performing the above steps, the vacuum of the vacuum vessel is completed.

In the above, the change of the voltage according to whether or not the vacuum pump 80 is loaded into the microcomputer 21 is used to determine and control the vacuum. For example, the change in the current according to whether or not the vacuum pump 80 is loaded is determined. The microcomputer 21 may be read to determine whether or not the vacuum and to control.

As described above, the vacuum pump 80 or the heating air is judged according to the vacuum mode or the vacuum / sealing mode according to whether the vacuum voltage or the operating current of the vacuum pump 80 is determined by the variation of the operating voltage or the operating current of the vacuum pump 80 without using the pressure sensor. In the case of the vacuum / sealing mode by controlling the Say 70, the inside of the vacuum wrapping paper may be vacuumed / sealed, and in the vacuum mode, the inside of the vacuum container may be a vacuum.

In addition, by dividing the reference value (BASE_DATA) into several stages in the microcomputer 21 and storing them in a register, the vacuum degree is divided into several stages, and the new operating voltage can be compared with the various reference values (BASE_DATA) to control and set the vacuum pressure step by step. And the degree of vacuum progress.

In addition, by amplifying a voltage which is changed very low depending on whether the vacuum pump 80 is loaded and removing noise, the microcomputer 21 may perform high reliability and safe operation.

In the above configuration, the vacuum pump 80 is used as the vacuum means and the heating assay 70 is used as the sealing means. However, the above means may be replaced with another one, which is also within the claims of the present invention. will be.

According to the embodiment of the present invention as described above, first, by using the change value of the current flowing in the vacuum pump can be applied to any power source regardless of the transformer type or SMPS type.

Second, by amplifying the voltage that changes very low depending on the load of the vacuum pump and removing noise, the microcomputer enables high reliability and safe operation, and by dividing the vacuum degree into several stages to operate the status lamp in each stage. The degree of vacuum can be checked visually.

As mentioned above, although this invention was demonstrated by the limited embodiment and drawing, this invention is not limited by this, The person of ordinary skill in the art to which this invention belongs, Of course, various modifications and variations are possible within the scope of the equivalent claims.

Claims (4)

A method for controlling the vacuum means and the sealing means in the microcomputer by measuring the pressure of the vacuum member of the vacuum packaging machine; The microcomputer reads the current or voltage change depending on whether the vacuum means is loaded or not and determines whether or not the vacuum is detected. In the vacuum mode, the vacuum means is stopped, and in the vacuum / sealing, the sealing means is operated for a sealing time. Method of controlling the vacuum packaging machine, characterized in that the stop with the vacuum means after. The method of claim 1, The vacuum is performed by operating a vacuum means to vacuum the inside of the vacuum member, measuring an operating current or an operating voltage of the vacuum means, and a predetermined current value previously stored in the measured operating current or operating voltage. Or storing a reference value (BASE_DATA) obtained by subtracting the voltage value into a register, measuring a new operating current or operating voltage of the vacuum means and comparing it with a reference value stored in the register, and wherein the new operating current or operating voltage is a reference value. If less than (BASE_DATA), the vacuum packaging machine control method characterized in that the determination by performing the step of determining the vacuum. The method of claim 2, After dividing the default value (BASE_DATA) into several stages (BASE_DATA1 ~ BASE_DATAn) and storing it in the register, the microcomputer continuously reads the operating current voltage and compares it with each default value (BASE_DATA1, BASE_DATA2,…, BASE_DATAn) and proceeds with vacuum. A control method of a vacuum packaging machine, characterized by controlling a lamp indicating the degree. The method of claim 2, And if the operating voltage is weak, a voltage obtained by amplifying the operating voltage and removing noise, and reading the voltage from the microcomputer.

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