Vacuum package air leakage detection device

Abstract

The invention relates to the technical field of vacuum packaging, in particular to a vacuum packaging air leakage detection device which comprises a hard shell, an elastic film and an air leakage feedback assembly, the hard shell is a rectangular shell with an opening in the top end, and the elastic film is fixedly connected to the upper portion of an inner cavity of the hard shell; the bottom end of the elastic film and the inner wall of the hard shell form a closed air chamber, the air leakage feedback assembly is arranged on the hard shell, the trigger end of the air leakage feedback assembly is connected to the elastic film in a follow-up mode, and when the detection device is placed into a vacuum packaging bag, if the vacuum packaging bag is intact and the elastic film is immobile, the air leakage feedback assembly is started. The air leakage feedback assembly does not perform air leakage feedback; if the vacuum packaging bag leaks air, the elastic film is bent towards one side of the bottom end of the inner cavity of the hard shell, the air leakage feedback assembly makes air leakage feedback, and the vacuum packaging air leakage detection device can improve the detection efficiency and reduce the labor cost.

Description

Technical Field

[0001] The present invention relates to the technical field of vacuum packaging, and in particular to a vacuum packaging air leakage detection device. Background Art

[0002] Vacuum packaging is widely used in the food industry to extend the shelf life of food, maintain the flavor of food and prevent spoilage. However, once the packaging leaks air, the food is easily contaminated by microorganisms and oxidized, thus reducing the quality and safety of the food. At present, the methods for detecting whether a vacuum packaging leaks air mainly include visual inspection, hand pressure test, and gas detection using gases such as helium. These methods are often time-consuming, laborious and costly. In addition, many traditional methods cannot continuously monitor during the product circulation process. Timely detection and treatment of leaking packages can prevent the decline of food quality and claim risks, and reduce economic losses caused by food spoilage. Summary of the Invention

[0003] The purpose of the present invention is to provide a vacuum packaging air leakage detection device to solve the technical problems existing in the above background art.

[0004] To achieve the above purpose, the technical solution of the present invention is as follows:

[0005] A vacuum packaging air leakage detection device includes: a rigid outer shell, an elastic film and an air leakage feedback component. The rigid outer shell is a rectangular shell with an open top. An elastic film is fixedly connected to the upper part of the inner cavity of the rigid outer shell. The bottom end of the elastic film and the inner wall of the rigid outer shell form a sealed air chamber. The air leakage feedback component is arranged on the rigid outer shell, and the trigger end of the air leakage feedback component is connected to the elastic film in a follow-up manner. When the detection device is placed in a vacuum packaging bag, if the vacuum packaging bag is intact, the elastic film does not move, and the air leakage feedback component does not give an air leakage feedback; if the vacuum packaging bag leaks air, the elastic film bends towards the bottom end side of the inner cavity of the rigid outer shell, and the air leakage feedback component gives an air leakage feedback.

[0006] Further, the vacuum packaging bag is a light-transmitting packaging bag.

[0007] Further, the air leakage feedback component includes: a photovoltaic cell, a rigid wire one, a rigid wire two, an LED lamp and a flexible wire. The photovoltaic cell is fixedly installed on the upper part of the left inner wall of the rigid outer shell. One end of a rigid wire one is connected to the positive electrode of the photovoltaic cell, and the other end of the rigid wire one extends into the sealed air chamber. The negative electrode of the photovoltaic cell is connected to an LED lamp through a rigid wire two. The LED lamp is also connected to one end of a flexible wire, and the other end of the flexible wire is fixed on the elastic film. If the vacuum packaging bag is intact, the elastic film does not move, and the rigid wire one and the flexible wire do not contact; if the vacuum packaging bag leaks air, the elastic film bends towards the bottom end side of the inner cavity of the rigid outer shell, and the rigid wire one and the flexible wire contact, and at this time the LED lamp lights up.

[0008] Further, the first rigid wire is L-shaped. The vertical part of the first rigid wire penetrates and is fixedly connected to the elastic film in a sealed manner. The end of the horizontal part of the first rigid wire extends to the lower part of the middle of the elastic film. The other end of the flexible wire is fixed to the middle of the top of the elastic film.

[0009] Further, the air leakage feedback component includes: an optical fiber bracket, a first optical fiber, a second optical fiber, a ball lens, a light shielding plate, and a condenser plate. There are several optical fiber brackets. The first optical fiber and the second optical fiber are respectively fixedly installed on the upper left and right sides of the inner cavity of the rigid outer shell through several optical fiber brackets. The first optical fiber and the second optical fiber are coaxially arranged. A ball lens is arranged at the right end of the second optical fiber. There is a gap between the first optical fiber and the second optical fiber. A light shielding plate is movably arranged at this gap. The bottom end of the light shielding plate is fixedly connected to the middle of the top of the elastic film. A condenser plate is arranged at the upper left part of the rigid outer shell. The condenser plate is correspondingly arranged with the left light inlet of the first optical fiber; if the vacuum packaging bag is intact, the elastic film does not move, the light shielding plate blocks the channel for light to enter the second optical fiber from the first optical fiber, and the light reflected by the condenser plate cannot reach the second optical fiber through the first optical fiber, and the ball lens does not emit light; if the vacuum packaging bag leaks air, the elastic film bends towards the bottom side of the inner cavity of the rigid outer shell, the light shielding plate disengages from the gap between the first optical fiber and the second optical fiber, the light reflected by the condenser plate enters the second optical fiber through the first optical fiber, and the ball lens emits light.

[0010] Further, the vacuum packaging bag is a light-transmitting packaging bag or a light-impermeable packaging bag.

[0011] Further, the air leakage feedback component includes: a perforated thin plate, an RFID tag chip, and a metal conductive strip. The perforated thin plate is fixedly connected to the upper part of the inner wall of the rigid outer shell. The RFID tag chip is fixedly installed in the middle of the bottom end of the perforated thin plate. The metal conductive strip is fixedly connected to the middle of the top of the elastic film. If the vacuum packaging bag is intact, the elastic film does not move, the metal conductive strip contacts the metal antenna of the RFID tag chip, resulting in a short circuit of the metal antenna, and the RFID tag chip cannot work properly; if the vacuum packaging bag leaks air, the elastic film bends towards the bottom side of the inner cavity of the rigid outer shell, the metal conductive strip does not contact the metal antenna of the RFID tag chip, and the RFID tag chip works normally.

[0012] Further, conductive contacts are arranged at the metal antenna of the RFID tag chip, and the conductive contacts are correspondingly arranged with the metal conductive strip.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] Put the entire detection device together with the food into a vacuum packaging bag. Through the air leakage feedback component, it can be known whether the vacuum packaging bag is leaking air. The entire device does not require active power supply, is small in size, low in cost, and convenient to operate, greatly improving the detection efficiency and reducing the labor cost. Brief Description of the Drawings

[0015] Figure 1 is a schematic structural diagram of Embodiment 1 of the present invention;

[0016] Figure 2 is a schematic structural diagram of Embodiment 2 of the present invention;

[0017] Figure 3 is a three-dimensional structural diagram of Embodiment 2 of the present invention;

[0018] Figure 4 is a schematic structural diagram of Embodiment 3 of the present invention;

[0019] Figure 5 is an equivalent circuit diagram of the internal antenna of the RFID tag chip in Embodiment 3 of the present invention.

[0020] The reference numerals in the drawings are: 1 - hard outer shell, 2 - elastic film, 3 - sealed air chamber, 4 - photovoltaic cell, 5 - first hard wire, 6 - second hard wire, 7 - LED lamp, 8 - flexible wire, 9 - optical fiber bracket, 10 - first optical fiber, 11 - second optical fiber, 12 - spherical lens, 13 - light shield, 14 - condenser plate, 15 - thin plate with holes, 16 - RFID tag chip, 17 - conductive contact, 18 - metal conductive strip. Detailed Description of the Invention

[0021] The present invention will be further described in detail below with reference to the drawings and embodiments.

[0022] Embodiment 1

[0023] The vacuum packaging bag in this embodiment is a light-transmitting packaging bag.

[0024] Refer to Figure 1 As shown, a vacuum packaging air leakage detection device includes: a hard outer shell 1, an elastic film 2 and an air leakage feedback component. The hard outer shell 1 is a rectangular shell with an open top. An elastic film 2 is fixedly connected to the upper part of the inner cavity of the hard outer shell 1. The bottom end of the elastic film 2 forms a sealed air chamber 3 with the inner wall of the hard outer shell 1. The air leakage feedback component is arranged on the hard outer shell 1, and the trigger end of the air leakage feedback component is connected to the elastic film 2 in a follow-up manner. When the detection device is put into the vacuum packaging bag, if the vacuum packaging bag is intact, the elastic film 2 does not move, and the air leakage feedback component does not give an air leakage feedback; if the vacuum packaging bag leaks air, the elastic film 2 bends towards the bottom end side of the inner cavity of the hard outer shell 1, and the air leakage feedback component gives an air leakage feedback.

[0025] The air leakage feedback component includes: a photovoltaic cell 4, a rigid wire one 5, a rigid wire two 6, an LED lamp 7, and a flexible wire 8. The photovoltaic cell 4 is fixedly installed on the upper part of the left inner wall of the rigid outer shell 1. One end of a rigid wire one 5 is connected to the positive electrode of the photovoltaic cell 4, and the other end of the rigid wire one 5 extends into the sealed air chamber 3. The negative electrode of the photovoltaic cell 4 is connected to an LED lamp 7 through a rigid wire two 6. One end of a flexible wire 8 is also connected to the LED lamp 7, and the other end of the flexible wire 8 is fixed on the elastic film 2. If the vacuum packaging bag is intact, the elastic film 2 does not move, and the rigid wire one 5 and the flexible wire 8 do not contact. If the vacuum packaging bag leaks air, the elastic film 2 bends towards the bottom side of the inner cavity of the rigid outer shell 1, and the rigid wire one 5 contacts the flexible wire 8. At this time, the LED lamp 7 lights up. By observing whether the LED lamp 7 lights up, it can be judged whether the vacuum packaging bag leaks air.

[0026] The rigid wire one 5 is L-shaped. The vertical part of the rigid wire one 5 penetrates and is fixedly connected to the elastic film 2 in a sealed manner. The end of the horizontal part of the rigid wire one 5 extends to the lower part of the middle of the elastic film 2. The other end of the flexible wire 8 is fixed in the middle of the top of the elastic film 2.

[0027] Embodiment 2

[0028] The vacuum packaging bag in this embodiment is a light-transmitting packaging bag.

[0029] See Figures 2 - 3 As shown, a vacuum packaging air leakage detection device includes: a rigid outer shell 1, an elastic film 2, and an air leakage feedback component. The rigid outer shell 1 is a rectangular shell with an open top. An elastic film 2 is fixedly connected to the upper part of the inner cavity of the rigid outer shell 1. The bottom end of the elastic film 2 and the inner wall of the rigid outer shell 1 form a sealed air chamber 3. The air leakage feedback component is arranged on the rigid outer shell 1, and the triggering end of the air leakage feedback component is connected to the elastic film 2 in a follow-up manner. When the detection device is placed in the vacuum packaging bag, if the vacuum packaging bag is intact, the elastic film 2 does not move, and the air leakage feedback component does not give an air leakage feedback. If the vacuum packaging bag leaks air, the elastic film 2 bends towards the bottom side of the inner cavity of the rigid outer shell 1, and the air leakage feedback component gives an air leakage feedback.

[0030] The air leakage feedback component includes: an optical fiber bracket 9, a first optical fiber 10, a second optical fiber 11, a ball lens 12, a light shielding plate 13, and a condenser plate 14. There are several optical fiber brackets 9. The first optical fiber 10 and the second optical fiber 11 are respectively fixedly installed on the upper left and right sides of the inner cavity of the rigid outer shell 1 through several optical fiber brackets 9. The first optical fiber 10 and the second optical fiber 11 are coaxially arranged. A ball lens 12 is provided at the right end of the second optical fiber 11. There is a gap between the first optical fiber 10 and the second optical fiber 11. A light shielding plate 13 is movably arranged at this gap. The bottom end of the light shielding plate 13 is fixedly connected to the middle of the top end of the elastic film 2. A condenser plate 14 is provided at the upper left side of the rigid outer shell 1. The condenser plate 14 is correspondingly arranged with the left light inlet of the first optical fiber 10. If the vacuum packaging bag is intact, the elastic film 2 does not move, the light shielding plate 13 blocks the channel for light to enter the second optical fiber 11 from the first optical fiber 10, and the light reflected by the condenser plate 14 cannot reach the second optical fiber 11 through the first optical fiber 10, and the ball lens 12 does not emit light. If the vacuum packaging bag leaks air, the elastic film 2 bends towards the bottom end side of the inner cavity of the rigid outer shell 1, the light shielding plate 13 disengages from the gap between the first optical fiber 10 and the second optical fiber 11, the light reflected by the condenser plate 14 enters the second optical fiber 11 through the first optical fiber, and the ball lens 12 emits light. By checking whether the ball lens 12 emits light, it can be determined whether the vacuum packaging bag leaks air.

[0031] Embodiment 3

[0032] Under this embodiment, the vacuum packaging bag is a light-transmitting packaging bag or a light-impermeable packaging bag.

[0033] See Figures 4 - 5 As shown, a vacuum packaging air leakage detection device includes: a rigid outer shell 1, an elastic film 2, and an air leakage feedback component. The rigid outer shell 1 is a rectangular shell with an open top. An elastic film 2 is fixedly connected to the upper part of the inner cavity of the rigid outer shell 1. The bottom end of the elastic film 2 and the inner wall of the rigid outer shell 1 form a sealed air chamber 3. The air leakage feedback component is arranged on the rigid outer shell 1. The trigger end of the air leakage feedback component is connected to the elastic film 2 in a follow-up manner. When the detection device is placed in a vacuum packaging bag, if the vacuum packaging bag is intact, the elastic film 2 does not move, and the air leakage feedback component does not give an air leakage feedback. If the vacuum packaging bag leaks air, the elastic film 2 bends towards the bottom end side of the inner cavity of the rigid outer shell 1, and the air leakage feedback component gives an air leakage feedback.

[0034] The air leakage feedback component includes: a perforated thin plate 15, an RFID tag chip 16, and a metal conductive strip 18. The perforated thin plate 15 is fixedly connected to the upper part of the inner wall of the rigid housing 1. The RFID tag chip 16 is fixedly installed in the middle of the bottom end of the perforated thin plate 15. The metal conductive strip 18 is fixedly connected to the middle of the top end of the elastic film 2. If the vacuum packaging bag is intact, the elastic film 2 does not move, and the metal conductive strip 18 contacts the metal antenna of the RFID tag chip 16, resulting in a short circuit of the metal antenna, and the RFID tag chip 16 cannot work properly. If the vacuum packaging bag leaks air, the elastic film 2 bends towards the bottom end side of the inner cavity of the rigid housing 1, and the metal conductive strip 18 does not contact the metal antenna of the RFID tag chip 16, and the RFID tag chip 16 works normally. When scanning a large number of vacuum packaging bags with a radio frequency gun, if there is a signal response, it means that a certain package of food leaks air. Since the tag contains ID information, it is possible to quickly detect which bag of food leaks air at the same time.

[0035] A conductive contact 17 is provided at the metal antenna of the RFID tag chip 16, and the conductive contact 17 is correspondingly arranged with the metal conductive strip 18.

[0036] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "top / bottom end", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present invention.

[0037] The above is only a preferred embodiment of the present invention, and does not impose any form of limitation on the present invention. Any person skilled in the art, without departing from the scope of the technical solution of the present invention, based on the technical essence of the present invention, any simple modification, equivalent replacement, and improvement made to the above embodiments still fall within the protection scope of the technical solution of the present invention.

Claims

1. A vacuum packaging air leakage detection device, characterized in that, Comprising: A rigid outer shell (1), an elastic film (2), and a leakage feedback component. The rigid outer shell (1) is a rectangular shell with an open top. An elastic film (2) is fixedly connected to the upper part of the inner cavity of the rigid outer shell (1). The bottom end of the elastic film (2) and the inner wall of the rigid outer shell (1) form a sealed air chamber (3). The leakage feedback component is arranged on the rigid outer shell (1), and the trigger end of the leakage feedback component is connected to the elastic film (2) in a follow-up manner. When the detection device is placed in a vacuum packaging bag, if the vacuum packaging bag is intact, the elastic film (2) does not move, and the leakage feedback component does not give a leakage feedback; if the vacuum packaging bag leaks, the elastic film (2) bends towards the bottom end side of the inner cavity of the rigid outer shell (1), and the leakage feedback component gives a leakage feedback.

2. The vacuum packaging air leakage detection device according to claim 1, wherein: The vacuum packaging bag is a light-transmitting packaging bag.

3. The leak detection device for vacuum packaging according to claim 2, wherein: The leakage feedback component includes: a photovoltaic cell (4), a rigid wire one (5), a rigid wire two (6), an LED lamp (7), and a flexible wire (8). The photovoltaic cell (4) is fixedly installed on the upper part of the left inner wall of the rigid outer shell (1). One end of a rigid wire one (5) is connected to the positive electrode of the photovoltaic cell (4), and the other end of the rigid wire one (5) extends into the sealed air chamber (3). The negative electrode of the photovoltaic cell (4) is connected to an LED lamp (7) through a rigid wire two (6). The LED lamp (7) is also connected to one end of a flexible wire (8), and the other end of the flexible wire (8) is fixed on the elastic film (2). If the vacuum packaging bag is intact, the elastic film (2) does not move, and the rigid wire one (5) and the flexible wire (8) do not contact; if the vacuum packaging bag leaks, the elastic film (2) bends towards the bottom end side of the inner cavity of the rigid outer shell (1), the rigid wire one (5) and the flexible wire (8) contact, and at this time the LED lamp (7) lights up.

4. The leak detection device for vacuum packaging according to claim 3, wherein: The rigid wire one (5) is in an L shape. The vertical part of the rigid wire one (5) penetrates and is fixedly connected to the elastic film (2) in a sealed manner. The end of the horizontal part of the rigid wire one (5) extends to the lower part of the middle of the elastic film (2). The other end of the flexible wire (8) is fixed to the middle of the top end of the elastic film (2).

5. The leak detection device for vacuum packaging according to claim 2, wherein: The air leakage feedback component includes: an optical fiber bracket (9), a first optical fiber (10), a second optical fiber (11), a ball lens (12), a light shielding plate (13), and a condenser plate (14). There are several optical fiber brackets (9). The first optical fiber (10) and the second optical fiber (11) are respectively fixedly installed on the upper left and right sides of the inner cavity of the rigid outer shell (1) through several optical fiber brackets (9). The first optical fiber (10) and the second optical fiber (11) are coaxially arranged. A ball lens (12) is arranged at the right end of the second optical fiber (11). There is a gap between the first optical fiber (10) and the second optical fiber (11). A light shielding plate (13) is movably arranged at this gap. The bottom end of the light shielding plate (13) is fixedly connected to the middle of the top end of the elastic film (2). A condenser plate (14) is arranged at the upper left part of the rigid outer shell (1). The condenser plate (14) is correspondingly arranged with the left light inlet of the first optical fiber (10). If the vacuum packaging bag is intact, the elastic film (2) does not move, the light shielding plate (13) blocks the channel for light to enter the second optical fiber (11) from the first optical fiber (10), and the light reflected by the condenser plate (14) cannot reach the second optical fiber (11) through the first optical fiber (10), and the ball lens (12) does not emit light. If the vacuum packaging bag leaks air, the elastic film (2) bends towards the bottom end side of the inner cavity of the rigid outer shell (1), the light shielding plate (13) disengages from the gap between the first optical fiber (10) and the second optical fiber (11), the light reflected by the condenser plate (14) enters the second optical fiber (11) through the first optical fiber, and the ball lens (12) emits light.

6. The leak detection device for vacuum packaging according to claim 1, characterized in that: The vacuum packaging bag is a light-transmitting packaging bag or a light-impermeable packaging bag.

7. The leak detection device for vacuum packaging according to claim 6, characterized in that: The air leakage feedback component includes: a perforated thin plate (15), an RFID tag chip (16), and a metal conductive strip (18). The perforated thin plate (15) is fixedly connected to the upper part of the inner wall of the rigid outer shell (1). The RFID tag chip (16) is fixedly installed in the middle of the bottom end of the perforated thin plate (15). The metal conductive strip (18) is fixedly connected to the middle of the top end of the elastic film (2). If the vacuum packaging bag is intact, the elastic film (2) does not move, the metal conductive strip (18) contacts the metal antenna of the RFID tag chip (16), resulting in a short circuit of the metal antenna, and the RFID tag chip (16) cannot work properly. If the vacuum packaging bag leaks air, the elastic film (2) bends towards the bottom end side of the inner cavity of the rigid outer shell (1), the metal conductive strip (18) does not contact the metal antenna of the RFID tag chip (16), and the RFID tag chip (16) works normally.

8. The vacuum packaging air leakage detection device according to claim 7, characterized in that: A conductive contact (17) is arranged at the metal antenna of the RFID tag chip (16), and the conductive contact (17) is correspondingly arranged with the metal conductive strip (18).

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