WO2020103868A1 - 一种用于真空压缩袋的单向排气通道及含有该单向排气通道的真空压缩袋 - Google Patents

一种用于真空压缩袋的单向排气通道及含有该单向排气通道的真空压缩袋

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Publication number
WO2020103868A1
WO2020103868A1 PCT/CN2019/119733 CN2019119733W WO2020103868A1 WO 2020103868 A1 WO2020103868 A1 WO 2020103868A1 CN 2019119733 W CN2019119733 W CN 2019119733W WO 2020103868 A1 WO2020103868 A1 WO 2020103868A1
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WO
WIPO (PCT)
Prior art keywords
bag
vacuum compression
sides
channel
pocket
Prior art date
Application number
PCT/CN2019/119733
Other languages
English (en)
French (fr)
Inventor
石正兵
Original Assignee
中山市太力家庭用品制造有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN201811390395.5A external-priority patent/CN109502162B/zh
Priority claimed from CN201821929122.9U external-priority patent/CN209567322U/zh
Application filed by 中山市太力家庭用品制造有限公司 filed Critical 中山市太力家庭用品制造有限公司
Priority to US17/288,921 priority Critical patent/US11702248B2/en
Priority to JP2021528398A priority patent/JP7191222B2/ja
Priority to DE112019005830.4T priority patent/DE112019005830T5/de
Publication of WO2020103868A1 publication Critical patent/WO2020103868A1/zh

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/01—Ventilation or drainage of bags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/18—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient
    • B65D81/20—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas
    • B65D81/2007—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas under vacuum
    • B65D81/2023—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas under vacuum in a flexible container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2205/00—Venting means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2205/00—Venting means
    • B65D2205/02—Venting holes

Definitions

  • the invention relates to the field of vacuum compression bags, in particular to a unidirectional exhaust channel for vacuum compression bags and a vacuum compression bag containing the unidirectional exhaust channel.
  • the traditional vacuum compression bags are all equipped with a vacuum suction valve. As shown in Figures 1-2, it is a traditional vacuum compression bag. Its characteristic is that the lower part of the bag body is split, which can make the bag body stand upright. It includes There is a front pocket sheet 1, a rear pocket sheet 2 and a bottom pocket sheet 3, the bottom pocket sheet 3 is connected to the lower part of the bag body formed by the front pocket sheet 1 and the rear pocket sheet 2, forming a Y-shaped lower part of the bag body Forked structure.
  • the bottom bag sheet 3 is divided into a first bottom surface 31 and a second bottom surface 32 by a fold line.
  • the outer edge of the first bottom surface 31 parallel to the fold line is pressed against the bottom edge of the front pocket 1, and similarly, the outer edge of the second bottom surface 32 parallel to the fold line is aligned with the bottom edge of the rear pocket 2 Pressing; the X1 sections on both sides of the first bottom surface 31 are respectively pressed with the lower section Y1 sections on both sides of the front pocket 1, and the X2 sections on both sides of the second bottom surface 32 are respectively connected with the back pocket 2
  • the lower sections Y2 on both sides are pressed together, the upper section Z1 on both sides of the front pocket sheet 1 and the upper section Z2 on both sides of the rear pocket sheet 2 are pressed together to form a bag body.
  • a bag mouth is formed between the top edge of the front bag sheet 1 and the top edge of the rear bag sheet 2, a buckling mechanism 5 is also provided at the bag mouth, and a vacuum exhaust valve 4 is opened on the
  • a vacuum suction valve and a vacuum suction pump are needed to evacuate the bag body, so it is very inconvenient to use. That is, the user also needs to purchase an additional vacuum suction pump. If you choose to purchase an electric vacuum suction pump, this will undoubtedly add a large additional cost to the consumer; if you use a low-cost manual vacuum suction pump to vacuum, the process It is laborious and time-consuming, and the exhaust efficiency is very low, especially for some large vacuum bags, the pumping efficiency is lower and the pumping time is longer.
  • the inventor has developed a simple exhaust method, that is, a unidirectional exhaust channel for exhaust is directly provided at the bottom of the vacuum compression bag.
  • a unidirectional exhaust channel for exhaust is directly provided at the bottom of the vacuum compression bag.
  • many structures have been discovered during the development process Of the unidirectional exhaust channels have phenomena such as irregular exhaust and / or air leakage.
  • the unidirectional exhaust channels are two staggered air channels at the bottom of the bag (see Figures 13 and 15). It can achieve a smoother exhaust, but after two to three days, outside air will return to the bag body through the one-way exhaust channel. Therefore, this kind of one-way exhaust channel cannot guarantee the bag's Tightness.
  • the first object of the present invention is to provide a unidirectional exhaust channel for a vacuum compression bag.
  • the unidirectional exhaust channel has a simple design, fast exhaust speed, and strong sealing after exhaust.
  • the second object of the present invention is to provide a vacuum compression bag containing the one-way exhaust channel.
  • a one-way exhaust channel for a vacuum compression bag which is used for a vacuum compression bag with a split body in the bag body.
  • the bag body of the vacuum compression bag includes a front bag piece, a back bag piece and at least one connection Sheet, wherein the connecting sheet is divided into a first connecting surface and a second connecting surface along a broken line, and is characterized by:
  • the one-way exhaust channel is a flexible material, which is provided in the vacuum compression bag, and is located between the front bag sheet and the first connection surface and / or between the back bag sheet and the second connection surface;
  • the air exhaust channel includes an air inlet, a horizontal air channel, a slant air channel, a vertical air channel, and an air outlet in sequence; one end of the horizontal air channel is an air inlet that communicates with the internal space of the bag, and the other One end communicates with the inclined air channel;
  • the bag body of the vacuum compression bag has an exhaust port communicating with the outside world, the bottom end of the vertical air channel communicates with the exhaust port, and the top end communicates with the inclined air channel, thereby At least two inflection points are formed at the position where the horizontal airway connects with the inclined airway and the position where the inclined airway connects with the vertical airway.
  • the one-way exhaust channel is formed by pressing the front pocket sheet and the first connection surface and / or the rear pocket sheet and the second connection surface.
  • the unidirectional exhaust channel of the present invention is formed by pressing two different bag sheets of the bag body, and the channel wall is the flexible bag body wall.
  • the unidirectional exhaust channel The channel is flattened under the action of atmospheric pressure, so that the one-way exhaust channel is shut off, thereby achieving sealing of the one-way exhaust channel.
  • the unidirectional exhaust passage of the present invention is designed as a combination of a horizontal air passage, an inclined air passage, and a vertical air passage.
  • the two ends of the inclined air passage are respectively connected to the horizontal air passage connected to the intake port and the exhaust port.
  • the connected vertical air passages when exhausting, due to artificial pressure on the bag body, so that the gas can smoothly enter the one-way exhaust passage from the air inlet, and then sequentially pass through the horizontal air passage, inclined
  • the air passage and the vertical air passage reach the exhaust port, so that the gas inside the vacuum compression bag can be easily discharged to the outside. Then, the vacuum compression bag and the unidirectional exhaust channel shrink and flatten under the action of atmospheric pressure, so that the unidirectional exhaust channel is closed to achieve a seal.
  • the unidirectional exhaust passage of the present invention forms two inflection points at the position where the horizontal air passage and the inclined air passage meet, and the position where the inclined air passage and the vertical air passage meet, the gas is discharged from the unidirectional exhaust passage
  • the flow direction needs to be changed twice, which increases the difficulty of gas recirculation.
  • the sealing performance of the vacuum compression bag is greatly improved, and the bag body can maintain the vacuum state for a long time.
  • the connecting piece of the present invention may be a bottom bag piece or a top bag piece.
  • the bag body When the connecting piece is a bottom bag piece, the bag body has a lower split structure; when the connecting piece is a top bag piece, the bag body has an upper split structure; when the connecting piece is two In the case of a top bag piece and a bottom bag piece, the bag body has a split structure at the upper and lower parts, respectively.
  • the exhaust port according to the present invention may be provided on the bottom edge or top edge of the bag body, or the side edges are close to the bottom edge or top edge.
  • a preferred embodiment of the present invention is that the one-way exhaust channel is provided at the corner of the vacuum compression bag. After the gas in the vacuum compression bag is basically discharged, its internal pressure is less than that of the outside. Under the action of atmospheric pressure, the vacuum compression bag is squeezed and contracted and deformed. Due to the relatively large space freedom at the corner of the bag, the bag body After being compressed and deformed, the position is relatively less affected, so when the one-way exhaust channel is provided at this position, the exhaust port is not easily closed prematurely due to the deformation of the bag, thereby Ensure that the gas inside the vacuum compression bag can be smoothly discharged to the outside.
  • the horizontal air channel is provided along the top and / or bottom edge of the vacuum compression bag body, and the air inlet faces the vacuum compression bag In the center of the top edge / or bottom edge of the bag body, the air outlet is provided on the side edge of the bag body of the vacuum compression bag, and is close to the top edge / or bottom edge of the bag body. Since the air in the bag body is mainly concentrated near the top or bottom of the bag body during the process of pressing and exhausting the vacuum compression bag, the air inlet is set toward the center of the top and / or bottom edge of the bag , Can expel the air to the outside of the bag more quickly.
  • the present invention is to increase the number of times the flow direction is changed when the gas passes through the one-way exhaust channel to further improve the air tightness.
  • the present invention preferably: the horizontal air channel includes a first horizontal air channel and a second horizontal air channel Channel, the first horizontal air channel and the second horizontal air channel are parallel to each other, the air inlet is located at one end of the first horizontal air channel, and the other end of the first horizontal air channel is One end of the air passage is connected, and an inflection point is formed between the first horizontal air passage and the second horizontal air passage, so that the horizontal air passage forms a U-shaped structure; the other end of the second horizontal air passage communicates with the inclined air passage.
  • the unidirectional exhaust channel designed in this way forms a total of four inflection points, which further improves the air tightness.
  • the inclined section may be a straight inclined airway or an arc inclined airway. Both straight inclined air passages and curved inclined air passages can achieve the effect of exhaust and sealing.
  • the diameters of the air inlet, the horizontal air passage, the inclined air passage, the vertical air passage, and the air outlet are 20-60 mm.
  • the diameter in this range can make the one-way exhaust channel achieve the ideal exhaust effect.
  • the length of the horizontal airway / or the first horizontal airway and the second horizontal airway is 40-150 mm, the length of the inclined airway is 100-250 mm, and the length of the vertical airway is 100-300 mm. Below this length, the length of the unidirectional exhaust channel is sufficiently long, thereby increasing the difficulty of gas recirculation and further enhancing the tightness of the vacuum compression bag.
  • the oblique air channel and the side of the bag body form an obtuse angle ⁇ , and the angle of ⁇ is 120 ° -160 °. Under the angle of this range, the ideal sealing effect can be achieved.
  • a vacuum compression bag with a unidirectional exhaust channel the bag body includes a front bag piece, a back bag piece and at least one connecting piece, and the connecting piece is divided into a first connecting surface and a second connecting surface by a fold line;
  • the two sides of the first connecting surface are respectively pressed against at least one end section of the two sides of the front pocket, that is, the upper section and / or the lower section to form a first upper side or a first lower side, collectively referred to as the first Side; correspondingly, the two sides of the second connecting surface are respectively pressed with at least one end section of the two sides of the back pocket, that is, the upper section and / or the lower section to form the second upper side and / or the first section
  • the two lower sides are collectively referred to as the second side; the remaining parts of the two sides of the front pocket and the back pocket are pressed together to form a third side, and the first side, the second side and the second side
  • the three sides together constitute the side of the bag body; the upper end of the bag body is formed with a bag mouth by the top edge of the front bag piece and the top edge of the rear bag piece, or parallel by the second connecting surface
  • a bag mouth of the bag body is formed at the outer edge of the fold line and the top edge of
  • the one-way exhaust channel is also provided in the bag body.
  • the one-way exhaust passage may be formed by the pressing between the front pocket sheet and the first connecting surface and / or by pressing the rear pocket sheet and the second connecting surface.
  • the unidirectional exhaust channel formed in this way will not cause the unidirectional exhaust channel to be prematurely closed after the items are placed in the vacuum compression bag, and the gas cannot be smoothly discharged to the outside.
  • the vacuum compression bag of the present invention can have many different forms:
  • the connecting piece of the present invention may be a top bag piece, forming a split structure with the upper part of the bag body: the top bag piece is divided into a first top surface and a second top surface along a fold line, and the second top
  • the outer edge parallel to the fold line and the top edge of the rear pocket sheet are pressed together to form a first top edge
  • the outer edge parallel to the fold line and the top edge of the front pocket sheet A bag mouth is formed between the two sides of the first top surface and the upper sections of the two sides of the front pocket sheet respectively to form a first upper side
  • the two sides of the second top surface are respectively
  • a second upper side is formed by being pressed together with upper sections of both sides of the back pocket sheet, and remaining portions of both sides of the front pocket sheet and the back pocket sheet are pressed to form a third side.
  • one of the one-way exhaust channels is provided at each of the four bag corners formed between the first top surface and the front pocket sheet, and between the second top surface and the rear pocket sheet.
  • the vacuum compression bag designed in this way allows the gas inside the vacuum compression bag to be discharged to the outside through the four unidirectional exhaust channels at the same time, thereby improving the efficiency of pressing the exhaust and making the exhaust faster.
  • the connecting piece of the present invention may also be a bottom bag piece forming a split structure with the lower part of the bag body: the bottom bag piece is divided into a first bottom face and a second bottom face along a fold line, the first bottom face The outer edge parallel to the fold line is pressed against the bottom edge of the front pocket to form a first bottom edge, and the second bottom surface is parallel to the outer edge parallel to the fold line and the bottom edge of the rear pocket Forming a second bottom edge; the two sides of the first bottom surface are respectively pressed with the lower sections of the two sides of the front pocket to form a first lower side, and the two sides of the second bottom surface are respectively The lower sections of the two sides of the back pocket piece are pressed together to form a second lower side, and the remaining parts of the two sides of the front pocket piece and the back pocket piece are the middle section and the upper section including both sides to form the first Three sides, the first lower side, the second lower side, and the third side together constitute the side of the bag body, and the top sides of the front and rear pockets form
  • the first lower side and the second lower side according to the present invention can be pressed together to form a reinforced side.
  • one of the one-way exhaust channels is provided at each of the four bag corners formed between the first bottom surface and the front pocket sheet, and between the second bottom surface and the rear pocket sheet.
  • the connecting piece of the present invention may further include two: a top bag piece and a bottom bag piece, respectively, that is, they form a split structure with the upper and lower parts of the bag body respectively, the above bag body has a split structure on the upper part and a lower part has a split structure
  • the side of the bag body is formed by the first upper side, the second upper side and the third side
  • the upper fork is formed by the first lower side, the second lower side and the third side
  • the side forms a lower split
  • the third side is a middle section of the side of the bag.
  • the invention can also be improved as follows:
  • An obtuse angle ⁇ formed by the inclined air passage of the one-way exhaust passage and the side of the bag body is also provided with a tear-resistant arc-shaped hot pressing block.
  • the arc-shaped hot pressing block can share the load bearing capacity of the bag body, so that the stress is dispersed, the strength of the bag body is improved, and the bag body is prevented from rupturing at the stress concentration, thereby improving the vacuum compression The service life of the bag.
  • the first side, the second side, and the third side form a junction A, and the inclined section of the one-way exhaust passage is formed on the side of the obtuse angle ⁇ by hot pressing to prevent
  • the distance between the horizontal tangent of the arc-shaped compact and the intersection point A is 5-20 mm, and it has a good anti-tear effect in this distance range.
  • the first side may be a first upper side or a first lower side; the second side may be a second upper side or a second lower side.
  • a clip layer is provided on the top surface of the top pocket sheet, and an accommodation space for movable insertion of the hard pressing plate is formed between the clip layer and the top surface of the top pocket sheet.
  • the present invention has the following beneficial effects:
  • the unidirectional exhaust channel according to the present invention allows the vacuum compression bag to contain the items, and then only needs to seal the bag mouth and press the vacuum compression bag to allow the air in the bag to pass through the single It is discharged to the outside of the exhaust channel, and the unidirectional exhaust channel and the bag body are squeezed and deformed under the effect of the internal and external air pressure difference to achieve a vacuum seal. There is no need to be equipped with a vacuum suction pump.
  • the one-way exhaust passage according to the present invention includes at least two inflection points, and the direction of air flowing through the one-way exhaust passage needs to be changed at least twice, thereby effectively increasing the outside air through the one-way exhaust passage
  • the difficulty of entering the inside of the bag body makes the vacuum compression bag maintain a vacuum state
  • the air inlet is set toward the center of the top / or bottom of the vacuum compression bag.
  • the air inside the bag is mainly concentrated near the top or bottom of the bag The location of such a design can expel the air to the outside of the bag more quickly;
  • the exhaust port of the present invention is provided at the side of the bag away from the corner of the bag, the location near the junction A is easy to open the air passage when the bag is compressed and exhausted, so that Gas recirculation affects the sealing effect, so the exhaust port is located near the corner of the side or bottom of the bag body, which can effectively prevent the vacuum compression bag from being broken at the intersection point A during the process of pressing the exhaust problem;
  • the diameter of the air inlet, horizontal air channel, inclined air channel, vertical air channel and exhaust port is 20 ⁇ 60mm, the diameter in this range can make the one-way exhaust channel ideal The exhaust effect;
  • the length of the horizontal air channel is 40 to 150 mm, the length of the inclined air channel is 100 to 250 mm, and the length of the vertical air channel is 100 to 300 mm, below this length, the unidirectional vacuum channel
  • the length is long enough to increase the difficulty of gas recirculation and further enhance the tightness of the vacuum compression bag;
  • the oblique air passage and the side of the bag body form an obtuse angle ⁇ , and the angle of ⁇ is 120 ° -160 °. Under this range of angles, an ideal sealing effect can be achieved.
  • Fig. 1 is a schematic perspective view of a conventional vacuum compression bag with a bifurcated structure.
  • Fig. 2 is an exploded schematic view of a conventional vacuum compression bag with a bifurcated structure.
  • FIG. 3 Example 1 Front view of a vacuum plastic bag containing a unidirectional exhaust channel.
  • FIG. 4 Example 2 Front view of a vacuum plastic bag containing a unidirectional exhaust channel.
  • FIG. 5 Example 3 Front view of a vacuum plastic bag containing a unidirectional exhaust channel.
  • FIG. 6 Embodiment 3 Front view 2 of a vacuum plastic bag containing a unidirectional exhaust channel.
  • Example 7 is a front view of a vacuum plastic bag with a unidirectional exhaust channel in Example 4.
  • FIG. 8 is a perspective view of a vacuum plastic bag with a unidirectional exhaust channel in Embodiment 5.
  • FIG. 10 is a perspective view of a vacuum plastic bag with unidirectional exhaust channels in Embodiment 6 of FIG. 10.
  • FIG. 11 is a perspective view of a vacuum plastic bag with a unidirectional exhaust channel in Example 7.
  • FIG. 11 is a perspective view of a vacuum plastic bag with a unidirectional exhaust channel in Example 7.
  • Figures 12 to 16 Comparative examples 1 to 5 Front view of vacuum plastic bags with unidirectional exhaust channels.
  • the one-way exhaust channel 6 is provided in a vacuum compression bag.
  • the one-way exhaust channel 6 includes a horizontal air channel 61, an inclined air channel 62, and a vertical air channel 63 that are sequentially connected.
  • a first inflection point is formed at the connection with the inclined air passage 62, a second inflection point is formed when the inclined air passage 62 is connected to the top of the vertical air passage 63, and the end of the horizontal air passage 61 away from the inclined air passage 62 is provided with an air inlet 60;
  • the bag body of the vacuum compression bag is provided with an exhaust port 64, and the bottom end of the vertical air passage 63 communicates with the exhaust port 64.
  • the vacuum compression bag is a vacuum compression bag with a split structure in the bag body, and the split structure is located at the bottom of the bag body.
  • the bag body of the vacuum compression bag includes a front bag sheet 1, a back bag sheet 2 and a bottom bag sheet 3, the bottom bag sheet 3 is divided into a first bottom surface 31 and a second bottom surface 32 along a fold line in the middle, the first bottom surface 31
  • the two sides of the two sides are respectively pressed with the lower end sections of the two sides of the front pocket 1 to form a first lower side;
  • the two sides of the second bottom surface 32 are respectively pressed with the lower end sections of the two sides of the rear pocket 2 , Forming the second lower side;
  • the remaining parts of the two sides of the front pocket 1 and the back pocket 2 are pressed against each other to form a third side; the first lower side, the second lower side and the third The sides together constitute the sides of the vacuum compression bag.
  • a pocket opening is formed between the top edges of the front pocket sheet 1 and the rear pocket sheet 2, and a fastening mechanism 5 for closing the pocket opening is provided at the pocket opening.
  • the two unidirectional exhaust channels 6 are pressed between the front pocket 1 and the first bottom surface 31, and are separated on the left and right sides of the vacuum plastic bag.
  • the horizontal air passage 61 is close to the bottom edge of the bag body, and the vertical air passage 63 is close to
  • the first lower side, the oblique air passage 62 and the third side form an obtuse angle ⁇ , the angle of ⁇ is 120 ° -160 °, the air inlet 60 faces the center of the bottom edge of the bag, and the exhaust port 64 is provided at the first lower side The bottom end of the side.
  • the bag opening is closed by the fastening mechanism 5, and then the bag body of the vacuum compression bag is squeezed, so that the air in the bag body can be discharged to the unidirectional exhaust channel 6 to external.
  • the channel wall of the unidirectional exhaust channel 6 is a flexible bag body wall.
  • the unidirectional exhaust channel 6 is flattened under the action of atmospheric pressure, so that the unidirectional exhaust channel 6 Turn off to achieve the sealing of the bag. If the outside air is to flow back into the bag through the unidirectional exhaust channel 6, the first inflection point and the second inflection point of the unidirectional exhaust channel 6 force the air to change the flow direction twice, thus forming a huge resistance.
  • the gas in the bag body is easily concentrated at the center of the bottom of the bag body. Therefore, the air inlet 60 toward the center of the bottom edge of the vacuum compression bag body can expedite the air in the bag to the outside faster.
  • the unidirectional exhaust channel 6 is also provided with an arc-shaped hot pressing block 7, which is specifically located at an obtuse angle ⁇ formed by the inclined air passage 62 and the third side, so that the arc-shaped hot pressing block 7 is dispersed in the extrusion The concentrated stress formed here during the process of pressure exhaust.
  • the first lower side, the second lower side and the third side form an intersection point A.
  • the distance between the horizontal tangent of the arc-shaped hot pressing block 7 and the intersection point A is d, and d is 5 to 20mm, has a good anti-tear effect in this distance range.
  • Embodiment 3 As shown in FIG. 5, the difference between Embodiment 3 and Embodiment 2 is:
  • the horizontal airway 61 includes a first horizontal airway 611 and a second horizontal airway 612, the first horizontal airway 611 and the second horizontal airway 612 communicate with each other, and between the first horizontal airway 611 and the second horizontal airway 612
  • the inflection point is formed so that the horizontal air passage 61 forms a U-shaped structure; the air inlet 60 is located at the end of the first horizontal air passage 611 away from the second horizontal air passage 612,
  • the inclined air passage 62 communicates.
  • the number of inflection points rises from two to four.
  • the outside air must return to the bag through the unidirectional exhaust channel 6 and undergo four changes of direction, which further increases resistance and improves Seal.
  • the lengths of the first horizontal airway 611 and the second horizontal airway 612 are L1, and the length of L1 is between 40 and 150 mm; the length of the inclined airway 62 is L2, and the length of L2 is 100 ⁇ 250mm; the length of the vertical airway 63 is L3, and the length of L3 is between 100 ⁇ 300mm.
  • the length of the unidirectional exhaust channel 6 is sufficiently long, thereby increasing the difficulty of gas recirculation and further enhancing the tightness of the vacuum compression bag.
  • the diameters of the air inlet 60, the horizontal air passage 61, the inclined air passage 62, the vertical air passage 63 and the air outlet 64 are 20-60 mm. The diameter in this range can make the one-way exhaust channel 6 achieve the ideal exhaust effect.
  • Embodiment 4 As shown in FIG. 7, the difference between Embodiment 4 and Embodiment 3 lies in:
  • the inclined air passage 62 is an arc-shaped air passage.
  • Both the linear inclined air passage 62 of Embodiment 2 and Embodiment 3 or the curved inclined air passage 62 of Embodiment 4 can obtain a good sealing effect.
  • Embodiment 5 As shown in Figures 8 and 9, the difference between Embodiment 5 and Embodiment 3 is:
  • a total of four unidirectional exhaust channels 6 are provided in the vacuum compression bag, of which two unidirectional exhaust channels 6 are provided between the front bag sheet 1 and the first bottom surface 31, and the two unidirectional exhaust channels 6 are vertical
  • the airway 63 is close to the first lower side 81 on the left and right sides, and is close to the intersection A formed by the first lower side 81, the second lower side 82, and the third side 83; the other two unidirectional The exhaust passage 6 is provided between the rear pocket sheet 2 and the second bottom surface 32.
  • the vertical air passages 63 of the two unidirectional exhaust passages 6 are closely adjacent to the second lower sides 82 on the left and right sides, and are close to the second At the intersection A formed by the lower side 81, the second lower side 82, and the third side 83. That is, one unidirectional exhaust passage 6 is provided at each of four pocket corners formed between the first bottom surface 31 and the front pocket sheet 1 and between the second bottom surface 32 and the rear pocket sheet 2.
  • Embodiment 6 As shown in FIG. 10, the difference between Embodiment 6 and Embodiment 5 is:
  • the vacuum compression bag has a split structure at the top and bottom.
  • the bag body includes a top bag sheet 9 in addition to the front bag sheet 1, the back bag sheet 2, and the bottom bag sheet 3.
  • the top pocket sheet 9 is divided into a first top surface 91 and a second top surface 92 along a fold line.
  • the two sides of the first top surface 91 are respectively pressed with the upper end sections of the two sides of the front pocket sheet 1 to form a first upper side 84;
  • the two sides of the second top surface 92 are respectively pressed with the upper end sections of the two sides of the back pocket 2 to form a second upper side 85;
  • the outer edge of the first top surface 91 and the top of the front pocket 1 A bag mouth is formed between them, and a fastening mechanism 5 is provided at the bag mouth.
  • the third side 83 is the remaining part of the two sides of the front pocket sheet 1 and the rear pocket sheet 2.
  • the first lower side 81, the second lower side 82, and the third side 83 form an intersection A1; the first upper side 84, the second upper side 85, and the third side 83 form an intersection A2.
  • Embodiment 7 As shown in FIG. 11, the difference between Embodiment 7 and Embodiment 6 is:
  • the first lower side 81 and the second lower side 82 are pressed together to form a reinforced side 86.
  • the one-way exhaust passage of Comparative Example 1 includes a horizontal air passage and two inclined air passages with different inclination angles in sequence, the intake port is located at one end of the horizontal air passage, and the exhaust port is located in the second section Tilt the end of the airway.
  • the unidirectional exhaust passage of Comparative Example 2 includes three vertical air passages arranged side by side, forming three U-shaped structures.
  • the unidirectional exhaust passage of Comparative Example 3 includes a horizontal air passage and a vertical air passage perpendicular to each other.
  • the unidirectional exhaust channel of Comparative Example 4 includes a plurality of inclined channels arranged side by side, and adjacent inclined channels form a U-shaped structure.
  • the unidirectional exhaust passage of Comparative Example 5 includes a horizontal air passage, and the intake and exhaust ports are respectively located at both ends of the horizontal air passage.
  • Example 1 to 7 and Comparative Examples 1 to 5 The vacuum sealing effect of Examples 1 to 7 and Comparative Examples 1 to 5 was tested: after the article was placed in the bag body, the bag mouth was sealed by a fastening mechanism, the bag body was squeezed to discharge the air inside the bag body to the outside, so that A vacuum state is formed in the body, and then the vacuum compression bag in the vacuum state is placed for 30 days (according to the general standard of the vacuum compression bag, the sealed state is kept for 30 days without air leakage as the minimum standard for air tightness), and the air leakage is recorded. The number of days.

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Abstract

一种用于真空压缩袋的单向排气通道及含有该单向排气通道的真空压缩袋，单向排气通道（6）设置在真空压缩袋内，且位于前袋片（1）与第一底面（31）之间和/或后袋片（2）与第二底面（32）之间；单向排气通道（6）包括进气口（60）、依次连通的水平气道（61）、倾斜气道（62）、竖直气道（63），以及排气口（64）；水平气道（61）的一端为与袋体内部空间连通的进气口（60），另一端与倾斜气道（62）连通；竖直气道（63）的底端与排气口（64）连通，顶端与倾斜气道（62）连通，从而在水平气道（61）与倾斜气道（62）相接的位置、倾斜气道（62）与竖直气道（63）相接的位置上至少形成两个拐点。该单向排气通道设计简单，排气速度快，而且排气后密封性强。

Description

一种用于真空压缩袋的单向排气通道及含有该单向排气通道的真空压缩袋 技术领域
本发明涉及真空压缩袋领域，具体涉及一种用于真空压缩袋的单向排气通道及含有该单向排气通道的真空压缩袋。
背景技术
传统的真空压缩袋上均设置有真空抽气阀，如图1～2所示为一种传统的真空压缩袋，其特点是包装袋袋体下部开叉，可使袋体直立起来，其包括有一前袋片1、一后袋片2和一底袋片3，所述底袋片3连接在前袋片1与后袋片2构成的袋体下部，形成袋体下部具有Y字型的分叉结构。
其中，所述底袋片3由一折线分为第一底面31和第二底面32。第一底面31与所述折线平行的外边缘与前袋片1的底边相压合，同样地，所述第二底面32与折线平行的外边缘与所述后袋片2的底边相压合；第一底面31的两侧边X1段分别与所述前袋片1两侧边的下段Y1段相压合，第二底面32的两侧边X2段分别与所述后袋片2两侧边的下段Y2相压合，所述的前袋片1的两侧边上段Z1段和后袋片2的两侧边上段Z2段相压合，构成袋体。所述前袋片1的顶边和所述后袋片2的顶边之间形成袋口，袋口处还设有扣合机构5，袋体上开设有一真空抽气阀4。其不足之处是：
所述真空压缩袋在使用时需要通过真空抽气阀配合真空抽气泵，才能将袋体抽真空，所以其使用起来非常不方便。即使用者还需要另外购买一个真空抽气泵，，如果选择购买电动真空抽气泵，这无疑给消费者增加了较大的额外开销；若果使用价格低廉的手动真空抽气泵来抽真空，其过程费力又费时，且排气效率很低，特别是对于一些尺寸比较大的真空袋，其抽气效率就更低了，所需要的抽气时间更长。
针对以上的技术缺陷，本发明人研发了一种简单的排气方式，就是在真空压缩袋的底部直接设置用于排气的单向排气通道，但是，在研发过程中发现，很多种结构的单向排气通道都存在着排气不顺和/或漏气等现象，例如单向排气通道为在袋体底部设置的两条相互错开的气道(参见图13、15)，其虽然能够实现较为顺畅的排气，但是，在经过两到三天的时间之后，外界空气便会通过该单向排气通道回流至袋体内，因此，该种单向排气通道无法保证袋体的密封性。
发明内容
本发明的第一个目的在于提供一种用于真空压缩袋的单向排气通道，该单向排气通道设计简单，排气速度快，而且排气后密封性强。
本发明的第二个目的在于提供含有该单向排气通道的真空压缩袋。
本发明的第一个目的通过以下技术方案实现：
一种用于真空压缩袋的单向排气通道，其用于袋体具有开叉结构的真空压缩袋上，所述的真空压缩袋的袋体包括前袋片、后袋片以及至少一块连接片，其中，所述的连接片沿一折线分为第一连接面和第二连接面，其特征在于：
所述的单向排气通道为柔性材质，其设置在真空压缩袋内，且位于前袋片与第一连接面之间和/或后袋片与第二连接面之间；所述的单向排气通道包括进气口、依次连通的水平气道、倾斜气道、竖直气道，以及排气口；所述水平气道的一端为与袋体内部空间连通的进气口，另一端与倾斜气道连通；真空压缩袋的袋体上开有与外界连通的排气口，所述竖直气道的底端与所述的排气口连通，顶端与倾斜气道连通，从而在水平气道与倾斜气道相接的位置、倾斜气道与竖直气道相接的位置上至少形成两个拐点。
优选地，所述的单向排气通道由前袋片与第一连接面和/或后袋片与第二连接面压合而成。
本发明所述的单向排气通道由袋体的两个不同袋片压合而成，通道壁即为柔性的袋体壁，当真空压缩袋排气完成后，所述的单向排气通道在大气压的作用下被压扁，使得所述单向排气通道关断，从而实现所述单向排气通道的密封。
而本发明所述的单向排气通道设计为水平气道、倾斜气道和竖直气道配搭，由倾斜气道两端分别连通与进气口相接的水平气道和与排气口相接的竖直气道，排气时，由于人为给袋体施压，使气体能够很顺畅地从所述的进气口进入单向排气通道，依次经过所述的水平气道、倾斜气道和竖直气道到达所述的排气口，从而能够比较轻松地将真空压缩袋内部的气体排出至外部。然后，真空压缩袋和单向排气通道在大气压的作用下收缩压扁，使单向排气通道关断实现密封。由于本发明所述的单向排气通道在水平气道与倾斜气道相接的位置、倾斜气道与竖直气道相接的位置共形成两个拐点，使气体从所述单向排气通道通过时，流动方向需经过两次改变，因而增大了气体回流的难度，再加上袋体密封后的负压作用，气体很难通过所述单向排 气通道回流至袋体内，从而大大提高了真空压缩袋的密封性，使袋体能够长久保持真空状态。
本发明所述的连接片可以是底袋片，也可以是顶袋片。当所述的连接片为一个底袋片时，袋体为下部开叉结构；当所述的连接片为一个顶袋片时，袋体为上部开叉结构；当所述的连接片为两个，分别是一个顶袋片和一个底袋片时，袋体为上、下部分别都有开叉的结构。
本发明所述的排气口可以设置于袋体的底边/或顶边上，或侧边靠近底边/或顶边的位置。
本发明推荐的一种实施方式是，所述的单向排气通道设置在真空压缩袋的袋角处。当真空压缩袋中的气体基本被排出后，其内部压强小于外部，在大气压的作用下，真空压缩袋被挤压并收缩变形，而由于袋角处的空间自由度相对较大，在袋体被压缩变形后该位置受到的影响相对较小，因而当把所述的单向排气通道设置于此位置时，所述的排气口不容易因袋体变形而过早地关断，从而保证真空压缩袋内部的气体可顺利地排出至外部。
本发明为了使真空压缩袋内的气体更快地排出至外部，所述的水平气道沿真空压缩袋袋体的顶边/或底边设置，所述的进气口朝向所述真空压缩袋袋体顶边/或底边的中心，所述的出气口设置在所述真空压缩袋袋体的侧边上，且靠近袋体的顶边/或底边。由于在真空压缩袋按压排气的过程中，袋体内部的空气主要集中在靠近袋体顶部或底部的位置，将进气口设置朝向所述真空压缩袋袋体顶边/或底边的中心，能更迅速地将空气排至袋体外部。
本发明为增加气体通过所述单向排气通道时改变流动方向的次数以更进一步地提高气密性，本发明优选地：所述的水平气道包括第一水平气道和第二水平气道，所述的第一水平气道与第二水平气道互相平行，所述的进气口位于所述第一水平气道的一端，所述第一水平气道的另一端与第二水平气道的一端连通，且在第一水平气道与第二水平气道之间形成拐点，使得水平气道形成U字形结构；所述第二水平气道的另一端与倾斜气道连通。如此设计的单向排气通道，共形成四个拐点，进一步提高了气密性。
作为本发明的一种优选实施方式：
所述的倾斜段可以是直线倾斜气道，也可以是弧形倾斜气道。无论是直线倾斜 气道还是弧形倾斜气道均能达到排气和密封的效果。
所述的进气口、水平气道、倾斜气道、竖直气道和排气口的直径为20～60mm。在此范围内的直径可使得所述的单向排气通道达到理想的排气效果。
所述水平气道/或第一水平气道、第二水平气道的长度为40～150mm，所述倾斜气道的长度为100～250mm，所述竖直气道的长度为100～300mm。在此长度之下，使得单向排气通道的长度足够长，从而增大了气体回流的难度，进一步地增强真空压缩袋的密封性。
所述的倾斜气道与袋体的侧边形成一钝角α，且α的角度为120°～160°。在此范围的角度下，能达到理想的密封效果。
本发明的第二个目的通过以下技术方案实现：
一种含有单向排气通道的真空压缩袋，其袋体包括前袋片、后袋片和至少一个连接片，所述的连接片由一折线分成第一连接面和第二连接面；
所述第一连接面的两侧边分别与所述前袋片两侧边的至少一端段，即上段和/或下段相压合形成第一上侧边或第一下侧边，统称第一侧边；相应地，所述第二连接面的两侧边分别与所述后袋片两侧边的至少一端段，即上段和/或下段相压合形成第二上侧边和/或第二下侧边，统称第二侧边；所述的前袋片和后袋片的两侧边剩余部分相压合形成第三侧边，所述的第一侧边、第二侧边和第三侧边共同构成所述袋体的侧边；所述袋体上端或者由前袋片的顶边和所述后袋片的顶边形成有袋口，或者由所述的第二连接面平行于所述折线的外边缘与所述后袋片的顶边形成所述袋体的袋口，袋口处设置有用于密封袋口的扣合机构；其特征在于：
所述的袋体内还设有所述的单向排气通道。
本发明可以通过所述的前袋片与第一连接面之间的压合和/或通过所述后袋片与第二连接面之间的压合形成所述的单向排气通道。这样形成的单向排气通道，不会因为物品放入真空压缩袋后，造成所述的单向排气通道过早关断，而无法将气体顺利排出至外部。
本发明所述的真空压缩袋可以有多种不同的形式：
本发明所述的连接片可以是顶袋片，与所述袋体上部形成开叉结构：所述的顶袋片沿一折线分为第一顶面和第二顶面，所述第二顶面与所述折线平行的外边缘与所述后袋片的顶边相压合形成第一顶边，所述第一顶面与所述折线平行的外边缘与 所述前袋片的顶边之间形成袋口；所述第一顶面的两侧边分别与所述前袋片的两侧边的上段相压合形成第一上侧边，所述第二顶面的两侧边分别与所述后袋片的两侧边的上段相压合形成第二上侧边，所述的前袋片和后袋片的两侧边剩余部分压合形成第三侧边。
优选地，所述的第一顶面与前袋片之间、第二顶面和后袋片之间形成的四个袋角处各设置一个所述的单向排气通道。这样设计的真空压缩袋，使得真空压缩袋内部的气体能同时通过四个所述的单向排气通道排出至外部，从而提高按压排气的效率，使得排气更加快捷。
本发明所述的连接片也可以是一底袋片，与所述袋体下部形成开叉结构：所述的底袋片沿一折线分为第一底面和第二底面，所述第一底面与所述折线平行的外边缘与所述前袋片的底边相压合形成第一底边，所述第二底面与所述折线平行的外边缘与所述后袋片的底边之间形成第二底边；所述第一底面的两侧边分别与所述前袋片的两侧边的下段相压合形成第一下侧边，所述第二底面的两侧边分别与所述后袋片的两侧边的下段相压合形成第二下侧边，所述的前袋片和后袋片的两侧边剩余部分即包括两侧边的中段和上段相压合形成第三侧边，所述的第一下侧边、第二下侧边和第三侧边共同构成所述袋体的侧边，所述的前袋片和后袋片的顶边形成袋口。
本发明所述的第一下侧边和第二下侧边可以相压合形成加固侧边。
优选地，所述的第一底面与前袋片之间、第二底面和后袋片之间形成的四个袋角处各设置一个所述的单向排气通道。
本发明所述的连接片还可以包括两个：分别是顶袋片和底袋片，即它们分别与袋体上部和下部形成开叉结构，是上述袋体上部具有开叉结构和下部具有开叉结构的组合，所述袋体的侧边由第一上侧边、第二上侧边和第三侧边形成上开叉，由第一下侧边、第二下侧边和第三侧边形成下开叉，所述第三侧边为袋体侧边的中段。
本发明还可以进行如下改进：
所述单向排气通道的倾斜气道与袋体的侧边形成的钝角α处还设置有防撕裂弧形热压块。当真空压缩袋按压排气时，所述的弧形热压块可分担袋体所承受的承重力，使得应力分散，提高袋体的强度，避免袋体在应力集中处破裂，从而提高真空压缩袋的使用寿命。
所述的第一侧边、第二侧边和第三侧边形成交汇点A，在所述的所述单向排气 通道的倾斜段在钝角α的一侧通过热压的方式形成有防撕裂的弧形热压块的情况下，所述弧形热压块的水平切线与交汇点A之间的距离为5～20mm，在此距离范围内具有较好的防撕裂效果。所述的第一侧边可以是第一上侧边或第一下侧边；所述的第二侧边可以是第二上侧边或第二下侧边。
优选地，所述的顶袋片的顶面设置有夹片层，所述的夹片层与所述顶袋片的顶面之间形成有可供硬压板活动插接的容置空间。
本发明与现有技术相比具有以下有益效果：
1.本发明所述的单向排气通道，使得真空压缩袋内盛装好物品后，只需将袋口密封后，对真空压缩袋进行按压，即可使袋体内的空气通过所述的单向排气通道排出至外部，而单向排气通道和袋体在内外气压差的作用下被挤压变形实现真空密封，无需另外配备真空抽气泵，操作简便，成本低；
2.本发明所述的单向排气通道包含至少两个拐点，空气流经该单向排气通道时需要经过至少两次的方向改变，从而有效加大了外部空气通过单向排气通道进入袋体内部的难度，使得真空压缩袋保持真空状态；
3.真空压缩袋被挤压并压缩变形时，由于袋角处的空间自由度相对较大，在袋体被压缩变形后该位置受到的影响相对较小，因而单向排气通道设置于此位置不容易因袋体变形而过早地关断，从而保证真空压缩袋内部的气体可顺利地排出至外部；
4.本发明将进气口设置朝向所述真空压缩袋袋体顶部/或底部的中心，由于在真空压缩袋按压排气的过程中，袋体内部的空气主要集中在靠近袋体顶部或底部的位置，如此设计能更迅速地将空气排至袋体外部；
5.当本发明所述的排气口设于袋体侧部远离袋体角落的位置处时，交汇点A附近的位置处在袋体被压缩排气时容易使气道张开，从而让气体回流，影响密封效果，因此排气口设于袋体的侧部或底部靠近角落的位置处，能有效地防止在按压排气的过程中，真空压缩袋于交汇点A处被撑破的问题；
6.所述的进气口、水平气道、倾斜气道、竖直气道和排气口的直径为20～60mm，在此范围内的直径可使得所述的单向排气通道达到理想的排气效果；
7.所述水平气道的长度为40～150mm，所述倾斜气道的长度为100～250mm，所述竖直气道的长度为100～300mm，在此长度之下，使得单向真空通道的长度足够长，从而增大了气体回流的难度，进一步地增强真空压缩袋的密封性；
8.所述的倾斜气道与袋体的侧边形成一钝角α，且α的角度为120°～160°，在此范围的角度下，能达到理想的密封效果。
附图说明
以下通过附图对本发明作进一步的说明。
图1传统具有分叉结构的真空压缩袋立体示意图。
图2传统具有分叉结构的真空压缩袋分解示意图。
图3实施例1含有单向排气通道的真空塑料袋正视图。
图4实施例2含有单向排气通道的真空塑料袋正视图。
图5实施例3含有单向排气通道的真空塑料袋正视图一。
图6实施例3含有单向排气通道的真空塑料袋正视图二。
图7实施例4含有单向排气通道的真空塑料袋正视图。
图8实施例5含有单向排气通道的真空塑料袋立体视图。
图9图8的I部局部放大图。
图10实施例6含有单向排气通道的真空塑料袋立体视图。
图11实施例7含有单向排气通道的真空塑料袋立体视图。
图12～16对比例1～5含有单向排气通道的真空塑料袋正视图。
附图标记：1-前袋片；2-后袋片；3-底袋片；31-第一底面；32-第二底面；4-真空抽气阀；5-扣合机构；6-单向排气通道；60-进气口；61-水平气道；611-第一水平气道；612-第二水平气道；62-倾斜气道；63-竖直气道；64-排气口；7-弧形热压块；81-第一下侧边；82-第二下侧边；83-第三侧边；84-第一上侧边；85-第二上侧边；86-加固侧边；9-顶袋片；91-第一顶面；92-第二顶面。
具体实施方式
以下通过具体的实施例对本发明作进一步的说明。
实施例1
如图3所示，单向排气通道6设置在真空压缩袋中，该单向排气通道6包括依次连通的水平气道61、倾斜气道62和竖直气道63，水平气道61与倾斜气道62连接处形成第一个拐点，倾斜气道62与竖直气道63的顶端连接形成第二个拐点，所述水平气道61远离倾斜气道62的一端设有进气口60；真空压缩袋的袋体上设有排气口64，竖直气道63的底端与排气口64连通。
所述的真空压缩袋为袋体具有开叉结构的真空压缩袋，该开叉结构位于袋体的底部。该真空压缩袋的袋体包括前袋片1、后袋片2和底袋片3，所述的底袋片3沿中部一折线分为第一底面31和第二底面32，第一底面31的两侧边分别与前袋片1两侧边的下端段相压合，形成第一下侧边；第二底面32的两侧边分别与后袋片2两侧边的下端段相压合，形成第二下侧边；前袋片1和后袋片2两侧边的剩余部分互相压合，形成第三侧边；所述的第一下侧边、第二下侧边和第三侧边共同构成真空压缩袋的侧边。
前袋片1与后袋片2的顶边之间形成袋口，袋口处设有用于封闭袋口的扣合机构5。
两个单向排气通道6压合于前袋片1和第一底面31之间，分居真空塑料袋的左右两侧，水平气道61紧贴袋体底边，竖直气道63紧贴第一下侧边，倾斜气道62与第三侧边形成钝角α，α的角度为120°～160°，进气口60朝向袋体底边的中心，排气口64设于第一下侧边的底端。使用时，将物品放入真空压缩袋内后，通过扣合机构5封闭袋口，然后对真空压缩袋的袋体进行挤压，即可使袋体内的空气通过单向排气通道6排出至外部。单向排气通道6的通道壁为柔性的袋体壁，当真空压缩袋排气后，所述的单向排气通道6在大气压的作用下被压扁，使得所述单向排气通道6关断，从而实现袋体的密封。外部空气若要通过单向排气通道6回流到袋体内，单向排气通道6的第一个拐点和第二个拐点迫使空气须改变两次流动方向，从而形成了巨大的阻力。
在挤压的过程中，袋体内的气体容易集中在袋体底部中心的位置，因此进气口60朝向真空压缩袋袋体底边的中心利于能更快地将袋体内的空气排出至外部。
实施例2
如图4所示，本实施例2与实施例1的区别在于：
单向排气通道6还设置有弧形热压块7，该弧形热压块7具体位于倾斜气道62与第三侧边形成钝角α处，从而通过弧形热压块7分散在挤压排气的过程中于此处形成的集中应力。
所述的第一下侧边、第二下侧边和第三侧边形成交汇点A，弧形热压块7的水平切线与该交汇点A之间的距离为d，且d为5～20mm，在此距离范围内具有较好的防撕裂效果。
实施例3
如图5所示，实施例3与实施例2的区别在于：
水平气道61包括第一水平气道611和第二水平气道612，第一水平气道611与第二水平气道612互相连通，第一水平气道611与第二水平气道612之间形成拐点，使得水平气道61形成U字形结构；进气口60位于第一水平气道611远离第二水平气道612的一端，第二水平气道612远离第一水平气道611的一端与倾斜气道62连通。
如此设计的单向排气通道6，拐点的数量从两个上升为四个，外部空气要通过单向排气通道6回流至袋体内，须经历四次方向改变，进一步加大了阻力，提高了密封性。
如图6所示，第一水平气道611和第二水平气道612的长度为L1，且L1的长度在40～150mm之间；倾斜气道62的长度为L2，且L2的长度在100～250mm之间；竖直气道63的长度为L3，且L3的长度在100～300mm之间。在此长度之下，使得单向排气通道6的长度足够长，从而增大了气体回流的难度，进一步地增强真空压缩袋的密封性。
所述的进气口60、水平气道61、倾斜气道62、竖直气道63和排气口64的直径为20～60mm。在此范围内的直径可使得所述的单向排气通道6达到理想的排气效果。
实施例4
如图7所示，实施例4与实施例3的区别在于：
倾斜气道62为弧形气道。
无论是实施例2、实施例3的直线型倾斜气道62还是本实施例4的弧形倾斜气道62均能很好地得到密封的效果。
实施例5
如图8、9所示，实施例5与实施例3的区别在于：
真空压缩袋中共设置有四个单向排气通道6，其中两个单向排气通道6设置于前袋片1与第一底面31之间，该两个单向排气通道6的竖直气道63分别紧贴左右两侧的第一下侧边81，且靠近第一下侧边81、第二下侧边82和第三侧边83形成的交汇点A处；另外两个单向排气通道6设置于后袋片2与第二底面32之间，该 两个单向排气通道6的竖直气道63分别紧贴左右两侧的第二下侧边82，且靠近第一下侧边81、第二下侧边82和第三侧边83形成的交汇点A处。即在第一底面31与前袋片1之间、第二底面32和后袋片2之间形成的四个袋角处各设置一个单向排气通道6。
实施例6
如图10所示，实施例6与实施例5的区别在于：
真空压缩袋为上下均具有开叉结构，其袋体除了前袋片1、后袋片2和底袋片3外，还包括顶袋片9。顶袋片9沿一折线分为第一顶面91和第二顶面92，第一顶面91的两侧边分别与前袋片1两侧边的上端段压合形成第一上侧边84；第二顶面92的两侧边分别与后袋片2两侧边的上端段压合形成第二上侧边85；第一顶面91的外边缘与前袋片1的顶边之间形成袋口，袋口处设置有扣合机构5。
第三侧边83为前袋片1和后袋片2两侧边的剩余部分。第一下侧边81、第二下侧边82和第三侧边83形成交汇点A1；第一上侧边84、第二上侧边85和第三侧边83形成交汇点A2。
实施例7
如图11所示，实施例7与实施例6的区别在于：
第一下侧边81和第二下侧边82相压合形成加固侧边86。
对比例1～5
如图12～16所示，对比例1～5的袋体与实施例1、实施例3相同，但排气通道结构不同：
如图12所示，对比例1的单向排气通道包括依次连通的水平气道和两段倾斜角度不同的倾斜气道，进气口位于水平气道的一端，排气口位于第二段倾斜气道的末端。
如图13所示，对比例2的单向排气通道包括并列设置的三个竖直气道，形成三个U字形结构。
如图14所示，对比例3的单向排气通道包括互相垂直的一个水平气道和一个竖直气道。
如图15所示，对比例4的单向排气通道包括多个并列设置的倾斜通道，且相邻的倾斜通道形成U字形结构。
如图16所示，对比例5的单向排气通道包括一个水平气道，且进气口出排气口分别位于水平气道的两端。
对实施例1～7以及对比例1～5的真空密封效果进行测试：在袋体内盛放物品后通过扣合机构将袋口密封，挤压袋体使袋体内的空气排出至外部，使袋体内形成真空状态，然后将真空状态的真空压缩袋放置30天(按照真空压缩袋的一般标准，密封状态保持放置30天不漏气为密封性的最低标准)，并记录其开始出现漏气状况时的天数。
实验结果如下表所示：
Figure PCTCN2019119733-appb-000001
从上表的实验结果可见，对比例1～4结构的单向排气通道，仅经过短短的1～3天时间内就出现了漏气的情况，密封效果不佳，无法达到真空压缩袋的使用要求；对比例5虽然在30天的时间内没有出现漏气的情况，但其占用袋体内的空间相对较大，不利于使用。
实施例1～7在30天内没有出现漏气现象，且单向排气通道所占据的袋体内空间较小，能很好地满足使用的需求。
需要指出的是，上述实施例仅是对本发明的进一步说明，而不是限制，本领域技术人员在与本发明技术方案的相当的含义和范围内的任何调整或改变，都应认为是包括在本发明的保护范围内。

Claims (20)

  1. 一种用于真空压缩袋的单向排气通道，其用于袋体具有开叉结构的真空压缩袋上，所述的真空压缩袋的袋体包括前袋片、后袋片以及至少一块连接片，其中，所述的连接片沿一折线分为第一连接面和第二连接面，其特征在于：
    所述的单向排气通道为柔性材质，其设置在真空压缩袋内，且位于前袋片与第一连接面之间和/或后袋片与第二连接面之间；所述的单向排气通道包括进气口、依次连通的水平气道、倾斜气道、竖直气道，以及排气口；所述水平气道的一端为与袋体内部空间连通的进气口，另一端与倾斜气道连通；真空压缩袋的袋体上开有与外界连通的排气口，所述竖直气道的底端与所述的排气口连通，顶端与倾斜气道连通，从而在水平气道与倾斜气道相接的位置、倾斜气道与竖直气道相接的位置上至少形成两个拐点。
  2. 根据权利要求1所述的用于真空压缩袋的单向排气通道，其特征在于，所述的单向排气通道由前袋片与第一连接面和/或后袋片与第二连接面压合而成。
  3. 根据权利要求2所述的用于真空压缩袋的单向排气通道，其特征在于，所述的排气口设置于袋体的底边/或顶边上，或侧边靠近底边/或顶边的位置。
  4. 根据权利要求3所述的用于真空压缩袋的单向排气通道，其特征在于，所述的单向排气通道设置在真空压缩袋的袋角处。
  5. 根据权利要求3所述的用于真空压缩袋的单向排气通道，其特征在于，所述的水平气道沿真空压缩袋袋体的顶边/或底边设置，所述的进气口朝向所述真空压缩袋袋体顶边/或底边的中心，所述的出气口设置在所述真空压缩袋袋体的侧边上，且靠近袋体的顶边/或底边。
  6. 根据权利要求5所述的用于真空压缩袋的单向排气通道，其特征在于，所述的水平气道包括第一水平气道和第二水平气道，所述的第一水平气道与第二水平气道互相平行，所述的进气口位于所述第一水平气道的一端，所述第一水平气道的另一端与第二水平气道的一端连通，且在第一水平气道与第二水平气道之间形成拐点，使得水平气道形成U字形结构；所述第二水平气道的另一端与倾斜气道连通。
  7. 根据权利要求6所述的用于真空压缩袋的单向排气通道，其特征在于，所述的倾斜段为直线倾斜气道或弧形倾斜气道。
  8. 根据权利要求6所述的用于真空压缩袋的单向排气通道，其特征在于，所述的进气口、水平气道、倾斜气道、竖直气道和排气口的直径为20～60mm。
  9. 根据权利要求6所述的用于真空压缩袋的单向排气通道，其特征在于，所述水平气道/或第一水平气道、第二水平气道的长度为40～150mm，所述倾斜气道的长度为100～250mm，所述竖直气道的长度为100～300mm。
  10. 根据权利要求6所述的用于真空压缩袋的单向排气通道，其特征在于，所述的倾斜气道与袋体的侧边形成一钝角α，且α的角度为120°～160°。
  11. 一种含有权利要求1～10任一项所述单向排气通道的真空压缩袋，其袋体包括前袋片、后袋片和至少一个连接片，所述的连接片由一折线分成第一连接面和第二连接面；
    所述第一连接面的两侧边分别与所述前袋片两侧边的至少一端段，即上段和/或下段相压合形成第一上侧边或第一下侧边，统称第一侧边；相应地，所述第二连接面的两侧边分别与所述后袋片两侧边的至少一端段，即上段和/或下段相压合形成第二上侧边和/或第二下侧边，统称第二侧边；所述的前袋片和后袋片的两侧边剩余部分相压合形成第三侧边，所述的第一侧边、第二侧边和第三侧边共同构成所述袋体的侧边；所述袋体上端或者由前袋片的顶边和所述后袋片的顶边形成有袋口，或者由所述的第二连接面平行于所述折线的外边缘与所述后袋片的顶边形成所述袋体的袋口，袋口处设置有用于密封袋口的扣合机构；其特征在于：所述的袋体内还设有单向排气通道。
  12. 根据权利要求11所述的真空压缩袋，其特征在于，所述的连接片为顶袋片，与所述袋体上部形成开叉结构；所述的顶袋片沿一折线分为第一顶面和第二顶面，所述第二顶面与所述折线平行的外边缘与所述后袋片的顶边相压合形成第一顶边，所述第一顶面与所述折线平行的外边缘与所述前袋片的顶边之间形成袋口；所述第一顶面的两侧边分别与所述前袋片的两侧边的上段相压合形成第一上侧边，所述第二顶面的两侧边分别与所述后袋片的两侧边的上段相压合形成第二上侧边，所述的前袋片和后袋片的两侧边剩余部分压合形成第三侧边。
  13. 根据权利要求12所述的真空压缩袋，其特征在于，所述的第一顶面与前袋片之间、第二顶面和后袋片之间形成的四个袋角处各设置一个所述的单向排气通道。
  14. 根据权利要求11所述的真空压缩袋，其特征在于，所述的连接片为底袋片，与所述袋体下部形成开叉结构：所述的底袋片沿一折线分为第一底面和第二底面，所述第一底面与所述折线平行的外边缘与所述前袋片的底边相压合形成第一底边，所述第二底面与所述折线平行的外边缘与所述后袋片的底边之间形成第二底边；所述第一底面的两侧边分别与所述前袋片的两侧边的下段相压合形成第一下侧边，所述第二底面的两侧边分别与所述后袋片的两侧边的下段相压合形成第二下侧边，所述的前袋片和后袋片的两侧边剩余部分即包括两侧边的中段和上段相压合形成第三侧边，所述的第一下侧边、第二下侧边和第三侧边共同构成所述袋体的侧边，所述的前袋片和后袋片的顶边形成袋口。
  15. 根据权利要求14所述的真空压缩袋，其特征在于，所述的第一下侧边和第二下侧边相压合形成加固侧边。
  16. 根据权利要求14所述的真空压缩袋，其特征在于，所述的第一底面与前袋片之间、第二底面和后袋片之间形成的四个袋角处各设置一个所述的单向排气通道。
  17. 根据权利要求11所述的真空压缩袋，其特征在于，所述的连接片包括两个，分别是顶袋片和底袋片，与所述袋体上部形成上部和下部同时开叉的结构；
    所述的顶袋片沿一折线分为第一顶面和第二顶面，所述第二顶面与所述折线平行的外边缘与所述后袋片的顶边相压合形成第一顶边，所述第一顶面与所述折线平行的外边缘与所述前袋片的顶边之间形成袋口；所述第一顶面的两侧边分别与所述前袋片的两侧边的上段相压合形成第一上侧边，所述第二顶面的两侧边分别与所述后袋片的两侧边的上段相压合形成第二上侧边；
    所述的底袋片沿一折线分为第一底面和第二底面，所述第一底面与所述折线平行的外边缘与所述前袋片的底边相压合形成第一底边，所述第二底面与所述折线平行的外边缘与所述后袋片的底边之间形成第二底边；所述第一底面的两侧边分别与所述前袋片的两侧边的下段相压合形成第一下侧边，所述第二底 面的两侧边分别与所述后袋片的两侧边的下段相压合形成第二下侧边；所述的前袋片和后袋片的两侧边剩余部分压合形成第三侧边。
  18. 根据权利要求11所述的真空压缩袋，其特征在于，所述单向排气通道的倾斜气道与袋体的侧边形成的钝角α处还设置有防撕裂弧形热压块。
  19. 根据权利要求18所述的真空压缩袋，其特征在于，所述的第一侧边、第二侧边和第三侧边形成交汇点A，所述弧形热压块的水平切线与交汇点A之间的距离为5～20mm；所述的第一侧边为第一上侧边或第一下侧边；所述的第二侧边为第二上侧边或第二下侧边。
  20. 根据权利要求12所述的真空压缩袋，其特征在于，所述的顶袋片的顶面设置有夹片层，所述的夹片层与所述顶袋片的顶面之间形成有可供硬压板活动插接的容置空间。
PCT/CN2019/119733 2018-11-21 2019-11-20 一种用于真空压缩袋的单向排气通道及含有该单向排气通道的真空压缩袋 WO2020103868A1 (zh)

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