JP4205382B2 - Control device for hermetic packer - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a controller for a hermetic packer that hermetically packs a bag made of a heat-welding resin film.
[0002]
[Prior art]
As a sealed pack device, the opening of the bag made of a heat-welding resin film is sandwiched between the main body and the lid, and the gas in the bag is sucked and degassed, and the opening of the bag is placed between the main body and the lid. In a known state, a heater disposed in the clamping unit is energized and heated, and the opening of the bag is heat-sealed and sealed.
[0003]
In addition, as a control device for such a sealed pack device, Japanese Patent Application Laid-Open No. 63-125123 discloses a temperature detection sensor in which the temperature of the heater for heat-welding the opening of the bag is arranged close to the heater. Detects and energizes the heater until it reaches a predetermined temperature. When the heater reaches a predetermined temperature, the energization is stopped, and after that, the heat-sealing is maintained by holding the crimped state for a predetermined time, and then the clamping pressure is released. What has been made is disclosed.
[0004]
According to such a configuration, in contrast to a configuration in which energization control is performed on the heater by time control using a timer, a non-fused portion is generated due to insufficient melting without being affected by fluctuations in temperature and power supply voltage. It can be stably sealed with high reliability without causing problems such as excessive melting and holes in the bag.
[0005]
[Problems to be solved by the invention]
However, in the above configuration, in order to accurately detect the heater temperature, a temperature detection sensor is provided in the vicinity of the high temperature heater, so the temperature detection sensor has a short life and ensures stable operating characteristics over a long period of time. However, there is a problem that proper sealing cannot be performed due to a failure of the temperature detection sensor or the operation may be disabled.
[0006]
In addition, since the deaeration pump is only controlled on / off, the bag cannot be sufficiently degassed, or conversely, the liquid is sucked when liquid is stored in the bag. There was a problem that it was not easy to use.
[0007]
In addition, a low-frequency transformer is used for the power supply unit for the heater. If the primary side of the low-frequency transformer is connected to the commercial power supply by turning on the power switch, energy is wasted. In addition, there is a problem that the temperature inside the main body is increased.
[0008]
In view of the above-described conventional problems, the present invention can provide a suitable seal over a long period of time without fear of failure, can be appropriately degassed according to the state of accommodation in the bag, is easy to use, and can achieve energy saving. An object of the present invention is to provide a control device for a packer.
[0009]
[Means for Solving the Problems]
A control device for a sealed pack device of the present invention is a control device for a sealed pack device that sucks and degass the gas inside a bag made of a heat-weldable resin film, and heats and melts it in a heater unit, and seals the power supply unit. a control unit that controls the operation of the heater unit, a temperature detecting section for outputting a detection signal to the control unit detects the temperature of the holding portion holding the heater unit, detects and controls the voltage of the power supply unit The control unit calculates a heating time for continuously operating the heater from the temperature of the holding unit and the voltage of the power supply unit before the operation of the heater unit. The heater unit is configured to operate only for a predetermined time.
[0010]
According to such a configuration, since the temperature detection unit is not directly exposed to the high temperature of the heater unit, the temperature detection unit can appropriately detect the temperature without fear of failure for a long period of time, and accordingly the holding unit is controlled by the heating time. By performing the heating time control in accordance with the temperature and the voltage of the power supply unit, the temperature control of the heater unit can be performed with high accuracy, and an appropriate sealing can be ensured.
[0011]
Also, a power supply unit, a control unit that controls the operation of the heater unit, a temperature detection unit that detects the temperature of the holding unit holding the heater unit and outputs a detection signal to the control unit, and a voltage of the power supply unit are detected And a voltage detection unit that outputs a detection signal to the control unit. The control unit detects the voltage of the power supply unit before the operation of the heater unit, and after the operation of the heater unit starts, the detected temperature of the temperature detection unit is Even if the operation of the heater unit is stopped after a time set based on the detection voltage after exceeding the predetermined temperature, the same effect can be obtained.
[0012]
Also, a warning means is provided for warning when the temperature is abnormal. When the temperature detected by the temperature detection section before the operation of the heater section is higher than a preset temperature, the operation of the heater section is stopped and the warning section is provided. It is preferable to be configured to operate, and by doing so, when the holding part of the heater part and the surroundings rise in temperature due to continuous use etc. and proper sealing operation cannot be performed, the sealing operation is stopped with a warning, It is possible to prevent a defective sealing state from occurring.
[0013]
It is also a control device for a sealed pack device that sucks and degass the gas inside the bag made of heat-welding resin film at the pump unit, heats and melts it at the heater unit, and supplies power to the heater unit and pump unit A power supply unit that controls the operation of the heater unit and the pump unit, and has at least two or more PWM drive modes as the pump unit drive mode. If the PWM drive mode is made variable between the time of sealing and the time of sealing, the PWM drive mode of the pump unit is changed according to the accommodation state in the bag, so that proper deaeration is possible and the usability is improved.
[0014]
Also, a control device for a hermetically sealed pack device that sucks and degass the gas inside the bag made of a heat-welding resin film by a pump unit, heats and melts it in a heater unit, and has a low-frequency transformer, and the heater unit And a power supply section that supplies power to the pump section, a control section that controls the operation of the heater section and the pump section, and a semiconductor element controlled by the control section, and opens and closes between the commercial power supply and the power supply section. When the control unit is configured to close the opening / closing unit only when operating the heater unit or the pump unit, the control unit 1 of the low-frequency transformer of the power supply unit only when operating the heater unit or the pump unit. Since the secondary side is connected to the commercial power source, energy is not consumed unnecessarily and the temperature inside the main body is not increased.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of a control device for a hermetic packer according to the present invention will be described with reference to FIGS.
[0016]
In FIG. 1, 31 is a main body of the hermetic pack device, and 32 is a lid body rotatably attached to the rear end of the main body 31 by a support shaft 33. A locking claw 35 that engages with a locking hole 34 provided on the main body 31 side is provided on both sides of the front end portion of the lower surface of the lid 32, and slightly interlocked with the locking claw 35 therebetween. An oscillating lock release lever 36 is provided. A deaeration chamber 37 that is sealed with the lid 32 closed is formed on the upper surface of the main body 31, and a deaeration port 38 that communicates with a deaeration pump 10 (see FIG. 3) described later is provided on the bottom surface. ing. The deaeration chamber 37 may be provided integrally with the main body 31, but may be configured as a deaeration chamber cartridge that is detachable from the main body 31 so that it can be easily cleaned.
[0017]
In front of the deaeration chamber 37, there is provided a seal heater portion 40 for heat-sealing an opening of a bag for containing food and the like for sealing, and the lid 32 is opposed to the seal heater portion 40. A seal pressing portion 39 is provided at the rear position of the lock release lever 36.
[0018]
An operation unit 16 for operating the hermetic pack device is provided at the rear upper surface of the main body 31, and a deaeration weak switch 17, a deaeration strong switch 18, a seal switch 19, and a display LED 20 for displaying respective operation states are provided. It is arranged.
[0019]
As shown in FIG. 2, the surface of the seal heater unit 40 is covered with a glass tape 41, and the heater 7 is disposed on the back surface thereof. The heater 7 is disposed on the upper surface of the holding portion 13 made of an aluminum frame, and the holding portion 13 is supported by the main body 31 via a cushion member 42. A temperature detection sensor 14 including a thermistor that detects the temperature of the seal heater unit 40 is disposed at an appropriate position that is not in direct contact with or close to the heater 7 of the holding unit 13.
[0020]
Next, the control device in the sealed pack device having the above overall configuration will be described with reference to FIG. Reference numeral 1 denotes a power plug connected to an AC, 100V commercial power source, and is connected to a power source unit 4 having a low-frequency transformer via a power switch 2 and a first opening / closing unit 3 using a switching transistor. The power plug 1 is connected to a control power circuit 5 via a power switch 2.
[0021]
The output of the power supply unit 4 is connected to a heater 7 via a second opening / closing unit 6 using a switching transistor. The output of the power supply unit 4 is connected to a motor drive circuit 8 that performs a PWM operation, and is configured to drive a deaeration pump 10 for suction and deaeration by a motor 9 driven by the motor drive circuit 8. Has been.
[0022]
Power is supplied from the power supply output terminal 5a for the microcomputer of the control power supply circuit 5 to the control unit 12 constituted by the microcomputer. Further, a voltage signal proportional to the commercial power supply voltage is input to the control unit 12 from the voltage value output unit 5 b of the control power supply circuit 5.
[0023]
The control unit 12 includes a detection signal from the temperature detection sensor 14 disposed at an appropriate position of the holding unit 13 holding the heater 7, an open / close signal of the lid open / close switch 15 that detects the open / closed state of the lid 32, and an operation unit. Switch signals of a deaeration weak switch 17, a deaeration strong switch 18, and a seal switch 19 provided in 16 are input. Further, the control unit 12 includes a timer unit (not shown) that counts the energization time to the heater 7.
[0024]
The control unit 12 controls the lighting of the display LED 20 that displays the operating state of each operation switch 17, 18, 19 provided in the operation unit 16, and controls the first photocoupler 21 including the light projecting element 21 a and the light receiving element 21 b. The first open / close unit 3 is controlled to open and close to control the supply of commercial power to the power supply unit 4, and the second open / close unit is connected via the second photocoupler 22 including the light projecting element 22 a and the light receiving element 22 b. 6 is configured to control energization to the heater 7 by controlling the opening / closing of the heater 6, and to control the motor drive circuit 8 by selecting one of a plurality of PWM drive modes, thereby controlling the deaeration operation by the deaeration pump 10. ing. The first and second photocouplers 21 and 22 are arranged to optically isolate the control system and the power system. In addition, as the plurality of PWM drive modes, two PWM drive modes are set in this embodiment, a mode corresponding to deaeration weakness and a mode corresponding to deaeration strongness.
[0025]
Next, the sealing operation by the sealed pack device having the above configuration will be described. First, the power switch 2 is turned on, the opening of the bag in which the contents are accommodated is placed on the seal heater portion 40 in which the heater 7 of the main body 31 is disposed, the lid 32 is closed, and the seal pressing portion 39 is closed. And hold between them. When the controller 12 detects that the lid 32 has been completely closed by an open / close signal from the lid open / close switch 15, the controller 12 starts a control operation. Next, when any one of the deaeration switches 17 and 18 of the operation unit 16 is pressed, the control unit 12 closes the first opening / closing unit 3 via the first photocoupler 21, and the power supply unit 4 is supplied with commercial power. Is supplied to start the operation, and the motor drive circuit 8 is driven and controlled in the PWM drive mode corresponding to the deaeration switches 17 and 18 pressed by the control unit 12 to perform desired suction deaeration. That is, when liquid or the like is contained in the bag, there is a risk that the contents will be sucked if deaerated with a high suction force. Therefore, the deaeration weak switch 17 is pressed, and a hard solid or the like is contained in the bag. If there is, the inside of the bag is deaerated with a high suction force by pressing the deaeration strong switch 18.
[0026]
Next, when the inside of the bag is evacuated, the seal switch 19 is pressed. Then, the control part 12 closes the 2nd opening-and-closing part 6 via the 2nd photocoupler 22, and it supplies with electricity to the heater 7, and the opening part of a bag is appropriately heat-melted and sealed. In this sealing operation, if the deaeration weak switch 17 is pressed, the deaeration is stopped to prevent the contents from moving to the sealed part and incomplete sealing. When the strong deaeration switch 18 is pressed, the deaeration is continued with the suction force corresponding to the deaeration weak switch 17 being pressed, thereby reliably preventing air from flowing in from the opening. Yes.
[0027]
In this sealing operation, an appropriate energization heating time for the heater 7 is controlled by the control unit 12 as follows. That is, the control unit 12 outputs to the heater 7 from the power supply unit 4 obtained from the temperature of the holding unit 13 detected by the temperature detection sensor 14 before the operation of the heater 7 and the voltage signal from the control power supply circuit 5. The heating time for continuously operating the heater 7 is calculated from the voltage, and the heater 7 is operated for the calculated time.
[0028]
Alternatively, the output voltage from the power supply unit 4 to the heater 7 is measured based on the voltage signal from the control power supply circuit 5 before the operation of the heater 7, and the heater 7 is energized and then detected by the temperature detection sensor 14. The temperature is monitored, and when the detected temperature exceeds a predetermined temperature, the energization is continued for a set time based on the detected output voltage to the heater 7 and then the energization to the heater 7 is stopped. Also good.
[0029]
Further, when the temperature detected by the temperature detection sensor 14 before the operation of the heater 7 is higher than a preset temperature, the energization operation to the heater 7 is stopped and the display LED 20 is blinked or provided separately. A buzzer is sounded to perform a warning operation.
[0030]
When the above sealing operation is completed, the first and second opening / closing sections 3 and 6 are opened via the first and second photocouplers 21 and 22, the drive control of the motor drive circuit 8 is stopped, and the display LED 20 Is turned off and the end of the sealing operation is notified, so the lock release lever 36 is lightly operated to open the lid 32 and take out the bag whose opening is sealed.
[0031]
According to the present embodiment, in the deaeration process, the deaeration pump 10 is driven in a plurality of PWM drive modes, depending on the accommodation state in the bag at the time of deaeration and between the time of deaeration and the time of sealing. Thus, the PWM drive mode is made variable so that proper deaeration according to various conditions is possible, and usability is improved.
[0032]
Further, in the sealing process, the temperature detection sensor 14 is disposed at an appropriate position of the operation unit 16 and is not directly exposed to the high temperature of the heater 7, so that the temperature can be detected appropriately for a long time without fear of failure. On the other hand, since the temperature of the heater 7 is not directly detected, the temperature of the heater 7 is controlled by the heating time. However, the heating time is controlled according to the detected temperature of the holding unit 13 and the voltage of the power supply unit 4. Therefore, the temperature control of the heater 7 can be performed with high accuracy, and an appropriate sealing can be ensured.
[0033]
Before the heater 7 is energized, the output voltage from the power supply unit 4 to the heater 7 is measured based on the voltage signal from the control power supply circuit 5, and the temperature of the holding unit 13 is monitored by the temperature detection sensor 14. While energization of the heater 7 is started and the detected temperature exceeds a predetermined temperature, the heater 7 is energized for a time set according to the detected voltage, and then the operation of the heater 7 is stopped. Even if it comprises, the same effect can be produced.
[0034]
In addition, the temperature of the holding unit 13 and the surroundings of the heater 7 is increased due to continuous use, and the temperature detected by the temperature detection sensor 14 before the operation of the heater 7 is higher than a preset temperature and is properly sealed. When the operation cannot be performed, the operation of the heater 7 is stopped and an appropriate warning is issued, so that it is possible to prevent a defective sealing state from occurring.
[0035]
Further, the first opening / closing part 3 is disposed between the power switch 2 and the power supply part 4 having a low-frequency transformer, and the first opening / closing part 3 is controlled only when the heater 7 or the motor 9 is operated. 12 is closed via the first photocoupler 21 in response to a command from 12, the primary side of the low-frequency transformer of the power supply unit 4 is connected to the commercial power supply only when the heater 7 or the motor 9 is operated. Therefore, energy is not consumed unnecessarily, and the temperature inside the main body is not increased.
[0036]
In the description of the above embodiment, an example in which the temperature detection sensor 14 is disposed at an appropriate position of the holding unit 13 of the heater 7 is shown. However, the temperature detection sensor 14 is not necessarily arranged in the holding unit 13 and is arranged around the heater 7. It may be provided, and the same effect can be obtained.
[0037]
【The invention's effect】
According to the control device of the sealing packer of the present invention, temperature detection unit can be prolonged over a failure without fear properly temperature detection by not directly exposed to the high temperature of the heater unit, and a heating time of the heater unit with it in controlling, by performing the heating time controlled in accordance with the voltage of the temperature and the power supply portion of the holding portion, the temperature control of the heater unit can be accurately performed, it is possible to ensure proper sealing.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an overall configuration of a hermetic packer according to an embodiment of the present invention.
FIG. 2 is a longitudinal side view of a main part of the sealed pack device of the embodiment.
FIG. 3 is a block diagram showing a schematic configuration of a control device for the hermetic packer according to the embodiment;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Power plug 3 1st opening-and-closing part 4 Power supply part 5 Power supply circuit 5b for control Voltage value output part 7 Heater 8 Motor drive circuit 9 Motor 10 Deaeration pump 12 Control part 14 Temperature detection sensor 20 Display LED

Claims (3)

  A control device for a sealed pack device that sucks and degass the gas inside the bag made of a heat-welding resin film, and heat-melts and seals it in the heater unit, and includes a power supply unit and a control unit that controls the operation of the heater unit, A temperature detection unit that detects the temperature of the holding unit that holds the heater unit and outputs a detection signal to the control unit, and a voltage detection unit that detects the voltage of the power supply unit and outputs the detection signal to the control unit The control unit is configured to calculate the heating time for continuously operating the heater from the temperature of the holding unit and the voltage of the power supply unit before the operation of the heater unit, and to operate the heater unit for the calculated time. A control device for a sealed pack device. A control device for a sealed pack device that sucks and degass the gas inside the bag made of a heat-welding resin film, and heat-melts and seals it in the heater unit, and includes a power supply unit and a control unit that controls the operation of the heater unit, A temperature detection unit that detects the temperature of the holding unit that holds the heater unit and outputs a detection signal to the control unit, and a voltage detection unit that detects the voltage of the power supply unit and outputs the detection signal to the control unit The control unit detects the voltage of the power supply unit before the operation of the heater unit, and is set based on the detection voltage after the detection temperature of the temperature detection unit exceeds a predetermined temperature after the operation of the heater unit is started. A control device for a hermetic packer, characterized in that the operation of the heater unit is stopped after time.   Provide warning means for warning when temperature is abnormal, and when the temperature detected by the temperature detection part before the operation of the heater part is higher than the preset temperature, stop the operation of the heater part and operate the warning part 3. The control device for the hermetic packer according to claim 1 or 2, wherein the control device is configured as described above.

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