Fresh-keeping package

Abstract

The utility model relates to the technical field of fresh-keeping packages, and discloses a fresh-keeping package which comprises a packaging container and an adjusting valve arranged on the packaging container, the adjusting valve comprises an upper cover, a lower cover detachably connected with the upper cover and a film arranged between the upper cover and the lower cover, an upper connecting rib is arranged on the upper cover, and a lower connecting rib is arranged on the lower cover. An upper gap is formed between every two adjacent upper connecting ribs, the lower cover comprises lower connecting ribs and a composite end fixedly connected with the film, a lower gap is formed between every two adjacent lower connecting ribs, each lower connecting rib comprises a rib body and a contact end in contact with the film, and the cross section of each contact end is an arc-shaped protrusion; the film can be protected through the upper cover and the lower cover, the film is protected from being damaged easily, the lower connecting rib can be prevented from making contact with the film through the composite end, the connecting rib cannot affect the breathability of the film, and the contact face is always located on the tangent plane of the arc-shaped protrusion when the film makes contact with the lower connecting rib through the lower connecting rib contact end with the cross section being the arc-shaped protrusion. And the lower connecting rib does not have obvious influence on the air permeability of the membrane.

Description

Technical Field

[0001] The utility model relates to the technical field of fresh-keeping packaging, in particular to a fresh-keeping packaging. Background Art

[0002] In recent years, online shopping has developed by leaps and bounds, and some fresh produce, vegetables, fruits and other products are also sold online. Since fresh produce, vegetables, fruits and other products have extremely high requirements for freshness and storage period, in order to ensure the freshness of fresh products sold online after being transported to consumers, people in this field have conducted in-depth research on related preservation technologies.

[0003] The initial application scenario of the preservation technology for fresh produce, vegetables, fruits and other products is in the fresh-keeping warehouse that does not need to be moved. The fresh-keeping warehouse stores fresh products through temperature control, humidity control, bacteria control and gas adjustment devices, so that fresh produce, vegetables, fruits and other products still have high freshness after long-term storage. However, traditional preservation technology equipment occupies a large area and cannot be applied to the fresh-keeping environment of online fresh produce, vegetables and fruits. Therefore, people in this field have proposed fresh-keeping packaging suitable for online fresh produce, vegetables and fruits on the basis of fresh-keeping warehouses, such as a portable multifunctional fruit and vegetable storage and transportation micro-environment gas control fresh-keeping box disclosed in CN104724400B, and another example is the patent application No. CN104724400B. 3612838B discloses a waterproof and breathable packaging box. The fresh-keeping packaging in the current prior art mainly consists of a packaging container and air holes arranged on the packaging container, wherein the air holes are provided with a membrane or a one-way breathable and waterproof valve for controlling the loss of water in the packaging container to ensure the gas balance inside and outside the packaging container. The present application finds that the one-way valve breathable membrane used in the prior art is arranged inside the valve, and other devices are required to control the one-way ventilation. The structure is complex and the cost is high, which is not conducive to application and promotion, and the fresh food cannot breathe freely. When the membrane is directly arranged, the membrane has no protective structure and is very easy to be damaged. Therefore, a membrane with a simple structure and a protective structure is needed. Utility Model Content

[0004] In order to overcome the problem that the one-way valve structure is complicated and the membrane structure is easily damaged when the membrane structure is directly set on the air vent in the prior art, the utility model provides a fresh-keeping package, which is composed of a packaging container and a regulating valve arranged on the packaging container, wherein the regulating valve is composed of an upper cover, a lower cover and a membrane arranged between the upper cover and the lower cover, and the membrane can be protected by the upper cover and the lower cover, so that the protective membrane is not easily damaged, the upper cover is provided with an upper connecting rib, and an upper gap is formed between adjacent upper connecting ribs, and the lower cover is provided with a lower connecting rib, and a lower gap is formed between adjacent upper connecting ribs, and the upper gap and the lower gap make the upper cover and the lower cover The space in which the cover is closed forms a hollow structure, so that the air on both sides of the membrane is connected. The lower cover is also provided with a composite end fixedly connected to the membrane. By setting the composite end, the upper connecting ribs and the lower connecting ribs can be prevented from contacting the membrane, so that the connecting ribs will not affect the air permeability of the membrane, and the connecting ribs will not have a significant effect on the air permeability of the membrane. The lower connecting rib includes a contact end in contact with the membrane, and the cross-section of the contact end is an arc-shaped protrusion. The arc-shaped protrusion can make the membrane always contact with the tangent of the arc-shaped protrusion when it contacts the lower connecting rib, so that even if the membrane contacts the lower connecting rib during use, the lower connecting rib will not affect the air permeability of the membrane.

[0005] The specific technical solution of the utility model is:

[0006] A fresh-keeping package comprises a packaging container and a regulating valve arranged on the packaging container, the regulating valve comprises an upper cover, a lower cover detachably connected to the upper cover, and a membrane arranged between the upper cover and the lower cover, the upper cover is provided with upper connecting ribs, and upper gaps are formed between adjacent upper connecting ribs, the lower cover comprises lower connecting ribs and a composite end fixedly connected to the membrane, and lower gaps are formed between adjacent lower connecting ribs, the lower connecting ribs comprise a rib body and a contact end in contact with the membrane, and the cross-section of the contact end is an arc-shaped protrusion.

[0007] The utility model provides a fresh-keeping package. The fresh-keeping box is composed of a packaging container and a regulating valve arranged on the packaging container. The regulating valve is composed of an upper cover, a lower cover and a membrane arranged between the upper cover and the lower cover. The regulating valve can allow gas on both sides of the membrane to flow freely and prevent the flow of water molecules, so that the fresh food in the fresh-keeping box can breathe freely. The upper cover and the lower cover can provide protection for the membrane so that the membrane will not be easily damaged. The regulating valve has a simple structure, low production cost and is easy to promote.

[0008] When setting the upper cover and the lower cover, the utility model takes into account the need to provide protection and reinforcement for the membrane without significantly affecting the air permeability of the membrane. Therefore, the utility model respectively sets upper connecting ribs and lower connecting ribs on the upper cover and the lower cover, and then the upper gap is formed by the adjacent upper connecting ribs, and the lower gap is formed by the adjacent lower connecting ribs, so that the upper cover and the lower cover form a hollow structure, so that the upper cover and the lower cover can provide protection and reinforcement for the membrane without significantly reducing the air permeability of the membrane. The utility model utilizes the matching of gas permeability and the respiratory characteristics of fruits and vegetables to make the internal gas environment of the fresh-keeping box evolve passively, the respiration of the packaged product and the gas permeation of the packaging material occur simultaneously, and the dynamic balance of the internal and external gas concentrations is achieved through gas exchange to delay the metabolic process and extend the shelf life.

[0009] During the design of the utility model, it was found that if the upper connecting rib and the lower connecting rib were directly in contact with the membrane, the surface of the membrane would be covered by the upper connecting rib and the lower connecting rib, and the effective air permeability area of ​​the membrane would be reduced after covering. Therefore, in order to prevent the upper connecting rib and the lower connecting rib from covering the membrane, the present application provides a composite end on the lower cover, and the connecting membrane is fixed by the composite end so that the upper and lower connecting ribs do not contact the membrane. In addition, considering that during the use of the regulating valve, one side of the lower connecting rib is arranged on the outside of the fresh-keeping packaging, and the gap between the membrane and the lower connecting rib is too large, dust and other particulate matter will easily accumulate in the gap. Therefore, in order to reduce dust particles as much as possible In order to prevent the pollution of particles to the regulating valve, it is necessary to reduce the gap between the lower connecting rib and the membrane so that the lower connecting rib and the membrane do not contact each other and the gap between the lower connecting rib and the membrane cannot be too large. In addition, during actual use, the utility model found that when the gap between the lower connecting rib and the membrane is too small, part of the membrane material will relax during use, making it easy for the membrane to contact with the lower connecting rib. Therefore, in order to solve this problem, the utility model optimizes the contact end where the lower connecting rib and the membrane contact, and sets the surface of the contact end into an arc-shaped protrusion, so that when the membrane contacts the lower connecting rib after relaxation, it is always in contact with the tangent of the arc-shaped protrusion, thereby significantly reducing the influence of the lower connecting rib on the air permeability of the membrane when it contacts the membrane.

[0010] Preferably, the upper cover is detachably connected to the lower cover; the detachable connection between the upper cover and the lower cover can facilitate replacement of the membrane.

[0011] Preferably, the area of ​​the upper gap is 60-98% of the upper surface area of ​​the upper cover.

[0012] Preferably, the area of ​​the lower gap is 60-98% of the area of ​​the lower surface of the lower cover.

[0013] By controlling the areas of the upper gap and the lower gap, it is ensured that the upper cover and the lower cover will not significantly reduce the gas regulation performance of the membrane and have a significant impact.

[0014] Preferably, the pore size of the membrane is 0.02-100 μm; limiting the pore size of the membrane can filter microorganisms, prevent the microorganisms from affecting the fresh food in the packaging container, and increase the freshness preservation effect of the fresh food.

[0015] Preferably, the membrane is one or more of PTFE, PE, PET, PC, UPE, HDPE, PP, PES, PVDF, PES and PS.

[0016] Preferably, a welding wire is provided on the composite end, and the welding wire fixedly connects the composite end and the film. The utility model provides a welding wire on the composite end, and then melts the welding wire by heat fusion and ultrasonic welding to fix the film and the composite end. The use of welding wire welding can significantly increase the sealing of the composite end after the film and the composite end are combined, so that the gas can only enter the fresh-keeping package after being filtered through the membrane, thereby significantly improving the antibacterial performance of the fresh-keeping package.

[0017] Preferably, the packaging container comprises an inner layer of hydrophilic material, an inner box layer, a heat-insulating layer and an outer shell which are arranged in sequence from inside to outside.

[0018] Preferably, the shell is aluminum foil, and the insulation layer is heat-insulating cardboard.

[0019] Preferably, the hydrophilic layer is a hydrophilic non-woven fabric.

[0020] Compared with the prior art, this application has the following technical effects:

[0021] The utility model provides a fresh-keeping package, which consists of a packaging container and a regulating valve arranged on the packaging container, wherein the regulating valve consists of an upper cover, a lower cover and a film arranged between the upper cover and the lower cover, the upper cover and the lower cover can provide protection for the film, the protective film is not easy to be damaged, an upper connecting rib is arranged on the upper cover, an upper gap is formed between adjacent upper connecting ribs, and a lower connecting rib is arranged on the lower cover, and a lower gap is formed between adjacent upper connecting ribs. The upper gap and the lower gap make the space closed by the upper cover and the lower cover form a hollow structure, so that the air on both sides of the film is connected, and the upper and lower covers are also provided with a fixed connection with the film by hot melt welding or ultrasonic welding, and the lower connecting rib can be prevented from contacting with the film by arranging a composite end, so that the connecting rib will not affect the air permeability of the film, and the lower connecting rib comprises a contact end contacting with the film, and the cross section of the contact end is an arc-shaped protrusion, and the arc-shaped protrusion can make the film always contact with the tangent of the arc-shaped protrusion when contacting with the lower connecting rib, so that even if the film contacts with the lower connecting rib when in use, the lower connecting rib will not affect the air permeability of the film. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the utility model.

[0023] Figure 2 It is a cross-sectional view of the regulating valve of the utility model.

[0024] Figure 3 It is a cross-sectional view of the regulating valve of the utility model.

[0025] In the figure, packaging container 1, regulating valve 2, upper cover 201, lower cover 202, film 203, upper connecting rib 204, upper gap 205, lower connecting rib 206, rib body 261, contact end 262, composite end 207, welding wire 271, lower gap 208, slot 209 and buckle 210. DETAILED DESCRIPTION

[0026] The utility model is further described below in conjunction with embodiments.

[0027] Embodiment 1:

[0028] like Figure 1 As shown, a fresh-keeping package includes a packaging container 1 and 10 regulating valves 2 arranged on the packaging container, one regulating valve is arranged on each of the four sides of the packaging container, and six regulating valves are arranged on the top of the packaging container. The packaging container is stacked from the inside to the outside, with an inner layer of hydrophilic material, a thermal insulation layer, a waterproof layer and an outer shell, the inner box layer is aluminum foil, the thermal insulation layer is a foam board, the outer shell is corrugated paper, and the waterproof layer is a hydrophilic non-woven fabric;

[0029] like Figure 2 As shown, the regulating valve includes a circular upper cover 201, a circular lower cover 202 detachably connected to the upper cover, and a membrane 203 arranged between the upper cover and the lower cover, the membrane is a PTFE composite membrane, the pore size of the membrane is 0.02~100μm, a plurality of upper connecting ribs 204 are arranged on the upper surface of the upper cover, and a diamond-shaped upper gap 205 is formed between adjacent upper connecting ribs, and the area of ​​the upper gap is 98% of the area of ​​the upper surface of the upper cover, a plurality of lower connecting ribs 206 are arranged on the lower surface of the lower cover, and a lower gap 208 is formed between adjacent lower connecting ribs, and the area of ​​the lower gap is 98% of the area of ​​the lower surface of the lower cover, the lower connecting rib includes a rib body 261 and a contact end 262 in contact with the membrane, the cross section of the contact end is an arc-shaped protrusion, the lower cover is provided with a composite end 207 fixedly connected to the membrane, a welding line 271 is arranged on the composite end, and the gap between the surface of the composite end and the contact end is 0.5 mm, laser welding is used to melt the welding wire and fix the connecting film and the composite end, and the upper cover and the lower cover are composited by welding, so that the fixation of the air valve and the carton is more airtight, the structural strength of the air valve is increased, and the air valve is more firm.

[0030] Embodiment 2:

[0031] like Figure 1As shown, a fresh-keeping package includes a packaging container 1 and 10 regulating valves 2 arranged on the packaging container, one regulating valve is arranged on each of the four sides of the packaging container, and six regulating valves are arranged on the top of the packaging container. The packaging container is stacked from the inside to the outside, with an inner layer of hydrophilic material, a thermal insulation layer, a waterproof layer and an outer shell, wherein the inner box layer is aluminum foil, the thermal insulation layer is a foam board, the outer shell is corrugated paper, and the waterproof layer is a hydrophilic non-woven fabric.

[0032] like Figure 3 As shown, the regulating valve includes a circular upper cover 201, a circular lower cover 202 detachably connected to the upper cover, and a membrane 203 arranged between the upper cover and the lower cover, the membrane is a composite PTFE membrane, the pore size of the membrane is 0.02~100μm, a plurality of upper connecting ribs 204 are arranged on the upper surface of the upper cover, and a diamond-shaped upper gap 205 is formed between adjacent upper connecting ribs, and the area of ​​the upper gap is 70% of the area of ​​the upper surface of the upper cover, a plurality of lower connecting ribs 206 are arranged on the lower surface of the lower cover, and a lower gap 208 is formed between adjacent lower connecting ribs, and the area of ​​the lower gap is 90% of the area of ​​the lower surface of the lower cover, the lower connecting rib includes a rib body 261 and a contact end 262 in contact with the membrane, the cross section of the contact end is an arc-shaped protrusion, the lower cover is provided with a composite end 207 fixedly connected to the membrane, a welding line 271 is arranged on the composite end, and the gap between the surface of the composite end and the contact end is 0.6 mm, hot welding is used to melt the welding wire and fix the connecting film and the composite end, a card slot 209 is provided on the upper cover, and a buckle 210 is provided on the lower cover, and the card slot and the buckle are detachably connected.

[0033] Embodiment 3:

[0034] like Figure 1 As shown, a fresh-keeping package includes a packaging container 1 and 10 regulating valves 2 arranged on the packaging container, one regulating valve is arranged on each of the four sides of the packaging container, and six regulating valves are arranged on the top of the packaging container. The packaging container is stacked from the inside to the outside, with an inner layer of hydrophilic material, a thermal insulation layer, a waterproof layer and an outer shell, the inner box layer is aluminum foil, the thermal insulation layer is a foam board, the outer shell is corrugated paper, and the waterproof layer is a hydrophilic non-woven fabric;

[0035] like Figure 3As shown, the regulating valve includes a circular upper cover 201, a circular lower cover 202 detachably connected to the upper cover, and a membrane 203 arranged between the upper cover and the lower cover, the membrane is a PET / PTFE composite membrane, the pore size of the membrane is 2~10μm, a plurality of upper connecting ribs 204 are arranged on the upper surface of the upper cover, and a diamond-shaped upper gap 205 is formed between adjacent upper connecting ribs, and the area of ​​the upper gap is 80% of the area of ​​the upper surface of the upper cover, a plurality of lower connecting ribs 206 are arranged on the lower surface of the lower cover, and a lower gap 208 is formed between adjacent lower connecting ribs, and the area of ​​the lower gap is 95% of the area of ​​the lower surface of the lower cover, the lower connecting rib includes a rib body 261 and a contact end 262 in contact with the membrane, the cross section of the contact end is an arc-shaped protrusion, a composite end 207 fixedly connected to the membrane is arranged inside the lower cover, a welding line 271 is arranged on the composite end, and the gap between the surface of the composite end and the contact end is 0.7 mm, laser welding is used to melt the welding wire and fix the connecting film and the composite end, a card slot 209 is provided on the upper cover, and a buckle 210 is provided on the lower cover, and the card slot and the buckle are detachably connected.

[0036] Embodiment 4:

[0037] like Figure 1 As shown, a fresh-keeping package includes a packaging container 1 and 10 regulating valves 2 arranged on the packaging container, one regulating valve is arranged on each of the four sides of the packaging container, and six regulating valves are arranged on the top of the packaging container. The packaging container is stacked from the inside to the outside, with an inner layer of hydrophilic material, a thermal insulation layer, a waterproof layer and an outer shell, the inner box layer is aluminum foil, the thermal insulation layer is a foam board, the outer shell is corrugated paper, and the waterproof layer is a hydrophilic non-woven fabric;

[0038] like Figure 3 As shown, the regulating valve includes a circular upper cover 201, a circular lower cover 202 detachably connected to the upper cover, and a membrane 203 arranged between the upper cover and the lower cover, the membrane is a PP / PTFE composite membrane, the pore size of the membrane is 2~10μm, a plurality of upper connecting ribs 204 are arranged on the upper surface of the upper cover, and a diamond-shaped upper gap 205 is formed between adjacent upper connecting ribs, and the area of ​​the upper gap is 90% of the area of ​​the upper surface of the upper cover, a plurality of lower connecting ribs 206 are arranged on the lower surface of the lower cover, and a lower gap 208 is formed between adjacent lower connecting ribs, and the area of ​​the lower gap is 98% of the area of ​​the lower surface of the lower cover, the lower connecting rib includes a rib body 261 and a contact end 262 in contact with the membrane, the cross section of the contact end is an arc-shaped protrusion, a composite end 207 fixedly connected to the membrane is arranged inside the lower cover, a welding line 271 is arranged on the composite end, and the gap between the surface of the composite end and the contact end is 0.8 mm, laser welding is used to melt the welding wire and fix the connecting film and the composite end, a card slot 209 is provided on the upper cover, and a buckle 210 is provided on the lower cover, and the card slot and the buckle are detachably connected.

[0039] Embodiment 5:

[0040] like Figure 1As shown, a fresh-keeping package includes a packaging container 1 and 10 regulating valves 2 arranged on the packaging container, one regulating valve is arranged on each of the four sides of the packaging container, and six regulating valves are arranged on the top of the packaging container. The packaging container is stacked from the inside to the outside, with an inner layer of hydrophilic material, a thermal insulation layer, a waterproof layer and an outer shell, the inner box layer is aluminum foil, the thermal insulation layer is a foam board, the outer shell is corrugated paper, and the waterproof layer is a hydrophilic non-woven fabric;

[0041] like Figure 3 As shown, the regulating valve includes a circular upper cover 201, a circular lower cover 202 detachably connected to the upper cover, and a membrane 203 arranged between the upper cover and the lower cover, the membrane is a PES / PTFE composite membrane, the pore size of the membrane is 0.02~100μm, a plurality of upper connecting ribs 204 are arranged on the upper surface of the upper cover, and a diamond-shaped upper gap 205 is formed between adjacent upper connecting ribs, and the area of ​​the upper gap is 98% of the area of ​​the upper surface of the upper cover, a plurality of lower connecting ribs 206 are arranged on the lower surface of the lower cover, and a lower gap 208 is formed between adjacent lower connecting ribs, and the area of ​​the lower gap is 98% of the area of ​​the lower surface of the lower cover, the lower connecting rib includes a rib body 261 and a contact end 262 in contact with the membrane, the cross section of the contact end is an arc-shaped protrusion, the lower cover is provided with a composite end 207 fixedly connected to the membrane, a welding line 271 is arranged on the composite end, and the gap between the surface of the composite end and the contact end is 1 mm, laser welding is used to melt the welding wire and fix the connecting film and the composite end, a card slot 209 is provided on the upper cover, and a buckle 210 is provided on the lower cover, and the card slot and the buckle are detachably connected.

[0042] Embodiment 6:

[0043] like Figure 1 As shown, a fresh-keeping package includes a packaging container 1 and 10 regulating valves 2 arranged on the packaging container, one regulating valve is arranged on each of the four sides of the packaging container, and six regulating valves are arranged on the top of the packaging container. The packaging container is stacked from the inside to the outside, with an inner layer of hydrophilic material, a thermal insulation layer, a waterproof layer and an outer shell, the inner box layer is aluminum foil, the thermal insulation layer is a foam board, the outer shell is corrugated paper, and the waterproof layer is a hydrophilic non-woven fabric;

[0044] like Figure 3As shown, the regulating valve includes a circular upper cover 201, a circular lower cover 202 detachably connected to the upper cover, and a membrane 203 arranged between the upper cover and the lower cover, the membrane is a PVDF / PTFE composite membrane, the pore size of the membrane is 0.02~100μm, a plurality of upper connecting ribs 204 are arranged on the upper surface of the upper cover, and a diamond-shaped upper gap 205 is formed between adjacent upper connecting ribs, and the area of ​​the upper gap is 98% of the area of ​​the upper surface of the upper cover, a plurality of lower connecting ribs 206 are arranged on the lower surface of the lower cover, and a lower gap 208 is formed between adjacent lower connecting ribs, and the area of ​​the lower gap is 98% of the area of ​​the lower surface of the lower cover, the lower connecting rib includes a rib body 261 and a contact end 262 in contact with the membrane, the cross section of the contact end is an arc-shaped protrusion, the lower cover is provided with a composite end 207 fixedly connected to the membrane, a welding line 271 is arranged on the composite end, and the gap between the surface of the composite end and the contact end is 0.5 mm, laser welding is used to melt the welding wire and fix the connecting film and the composite end, a card slot 209 is provided on the upper cover, and a buckle 210 is provided on the lower cover, and the card slot and the buckle are detachably connected.

[0045] Embodiment 7:

[0046] like Figure 1 As shown, a fresh-keeping package includes a packaging container 1 and 10 regulating valves 2 arranged on the packaging container, one regulating valve is arranged on each of the four sides of the packaging container, and six regulating valves are arranged on the top of the packaging container. The packaging container is stacked from the inside to the outside, with an inner layer of hydrophilic material, a thermal insulation layer, a waterproof layer and an outer shell, the inner box layer is aluminum foil, the thermal insulation layer is a foam board, the outer shell is corrugated paper, and the waterproof layer is a hydrophilic non-woven fabric;

[0047] like Figure 3 As shown, the regulating valve includes a circular upper cover 201, a circular lower cover 202 detachably connected to the upper cover, and a membrane 203 arranged between the upper cover and the lower cover, the membrane is a PC / PTFE composite membrane, the pore size of the membrane is 0.02~100μm, a plurality of upper connecting ribs 204 are arranged on the upper surface of the upper cover, and a diamond-shaped upper gap 205 is formed between adjacent upper connecting ribs, and the area of ​​the upper gap is 98% of the area of ​​the upper surface of the upper cover, a plurality of lower connecting ribs 206 are arranged on the lower surface of the lower cover, and a lower gap 208 is formed between adjacent lower connecting ribs, and the area of ​​the lower gap is 98% of the area of ​​the lower surface of the lower cover, the lower connecting rib includes a rib body 261 and a contact end 262 in contact with the membrane, the cross section of the contact end is an arc-shaped protrusion, the lower cover is provided with a composite end 207 fixedly connected to the membrane, a welding line 271 is arranged on the composite end, and the gap between the surface of the composite end and the contact end is 0.5 mm, laser welding is used to melt the welding wire and fix the connecting film and the composite end, a card slot 209 is provided on the upper cover, and a buckle 210 is provided on the lower cover, and the card slot and the buckle are detachably connected.

[0048] Embodiment 8:

[0049] like Figure 1 As shown, a fresh-keeping package includes a packaging container 1 and 10 regulating valves 2 arranged on the packaging container, one regulating valve is arranged on each of the four sides of the packaging container, and six regulating valves are arranged on the top of the packaging container. The packaging container is stacked from the inside to the outside, with an inner layer of hydrophilic material, a thermal insulation layer, a waterproof layer and an outer shell, the inner box layer is aluminum foil, the thermal insulation layer is a foam board, the outer shell is corrugated paper, and the waterproof layer is a hydrophilic non-woven fabric;

[0050] like Figure 3 As shown, the regulating valve includes a circular upper cover 201, a circular lower cover 202 detachably connected to the upper cover, and a membrane 203 arranged between the upper cover and the lower cover, the membrane is a UPE / PTFE composite membrane, the pore size of the membrane is 0.02~100μm, a plurality of upper connecting ribs 204 are arranged on the upper surface of the upper cover, and a diamond-shaped upper gap 205 is formed between adjacent upper connecting ribs, and the area of ​​the upper gap is 98% of the area of ​​the upper surface of the upper cover, a plurality of lower connecting ribs 206 are arranged on the lower surface of the lower cover, and a lower gap 208 is formed between adjacent lower connecting ribs, and the area of ​​the lower gap is 98% of the area of ​​the lower surface of the lower cover, the lower connecting rib includes a rib body 261 and a contact end 262 in contact with the membrane, the cross section of the contact end is an arc-shaped protrusion, the lower cover is provided with a composite end 207 fixedly connected to the membrane, a welding line 271 is arranged on the composite end, and the gap between the surface of the composite end and the contact end is 0.5 mm, laser welding is used to melt the welding wire and fix the connecting film and the composite end, a card slot 209 is provided on the upper cover, and a buckle 210 is provided on the lower cover, and the card slot and the buckle are detachably connected.

[0051] Embodiment 9:

[0052] like Figure 1 As shown, a fresh-keeping package includes a packaging container 1 and 10 regulating valves 2 arranged on the packaging container, one regulating valve is arranged on each of the four sides of the packaging container, and six regulating valves are arranged on the top of the packaging container. The packaging container is stacked from the inside to the outside, with an inner layer of hydrophilic material, a thermal insulation layer, a waterproof layer and an outer shell, the inner box layer is aluminum foil, the thermal insulation layer is a foam board, the outer shell is corrugated paper, and the waterproof layer is a hydrophilic non-woven fabric;

[0053] like Figure 3As shown, the regulating valve includes a circular upper cover 201, a circular lower cover 202 detachably connected to the upper cover, and a membrane 203 arranged between the upper cover and the lower cover, the membrane is a HDPE / PTFE composite membrane, the pore size of the membrane is 0.02~100μm, a plurality of upper connecting ribs 204 are arranged on the upper surface of the upper cover, and a diamond-shaped upper gap 205 is formed between adjacent upper connecting ribs, and the area of ​​the upper gap is 98% of the area of ​​the upper surface of the upper cover, a plurality of lower connecting ribs 206 are arranged on the lower surface of the lower cover, and a lower gap 208 is formed between adjacent lower connecting ribs, and the area of ​​the lower gap is 98% of the area of ​​the lower surface of the lower cover, the lower connecting rib includes a rib body 261 and a contact end 262 in contact with the membrane, the cross section of the contact end is an arc-shaped protrusion, the lower cover is provided with a composite end 207 fixedly connected to the membrane, a welding line 271 is arranged on the composite end, and the gap between the surface of the composite end and the contact end is 0.5 mm, laser welding is used to melt the welding wire and fix the connecting film and the composite end, a card slot 209 is provided on the upper cover, and a buckle 210 is provided on the lower cover, and the card slot and the buckle are detachably connected.

[0054] The above description is only a preferred embodiment of the present invention and does not constitute any limitation to the present invention. Any simple modification, change and equivalent transformation made to the above embodiments according to the technical essence of the present invention shall still fall within the protection scope of the technical solution of the present invention.

Claims

1. A fresh-keeping package, characterized in that: The invention comprises a packaging container (1) and a regulating valve (2) arranged on the packaging container, wherein the regulating valve comprises an upper cover (201), a lower cover (202) detachably connected to the upper cover, and a membrane (203) arranged between the upper cover (201) and the lower cover (202); the upper cover is provided with an upper connecting rib (204), and an upper gap (205) is formed between adjacent upper connecting ribs; the lower cover comprises a lower connecting rib (206) and a composite end (207) fixedly connected to the membrane, and a lower gap (208) is formed between adjacent lower connecting ribs; the lower connecting rib comprises a rib body (261) and a contact end (262) in contact with the membrane, and the cross section of the contact end is an arc-shaped protrusion.

2. The fresh-keeping package according to claim 1, characterized in that: The upper cover (201) and the lower cover (202) are detachably connected.

3. The fresh-keeping package according to claim 1, characterized in that: The area of ​​the upper gap (205) is 60-98% of the upper surface area of ​​the upper cover.

4. The fresh-keeping package according to claim 1, characterized in that: The area of ​​the lower gap (208) is 60-98% of the area of ​​the lower surface of the lower cover.

5. The fresh-keeping package according to claim 1, characterized in that: The pore size of the membrane is 0.02-100 μm.

6. The fresh-keeping package according to claim 1 or 5, characterized in that: The material of the membrane is one or more of PTFE, PE, PET, PC, UPE, HDPE, PP, PES, PVDF, PES and PS.

7. The fresh-keeping package according to claim 1, characterized in that: A welding wire (271) is provided on the composite end, and the welding wire fixedly connects the composite end and the film.

8. The fresh-keeping package according to claim 1, characterized in that: The packaging container comprises an inner layer of hydrophilic material, an inner box layer, a heat-insulating layer and an outer shell which are arranged in sequence from the inside to the outside.

9. The fresh-keeping package according to claim 8, characterized in that: The inner box layer is aluminum foil, and the thermal insulation layer is foam board.

10. The fresh-keeping package according to claim 8, characterized in that: The inner layer hydrophilic material is a hydrophilic non-woven fabric.

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