CN113928691B

CN113928691B - Vegetable fresh-keeping device and fresh-keeping method

Info

Publication number: CN113928691B
Application number: CN202111202444.XA
Authority: CN
Inventors: 俞静芬; 林旭东; 林波; 尚海涛; 朱麟
Original assignee: Ningbo Academy of Agricultural Sciences
Current assignee: Ningbo Academy of Agricultural Sciences
Priority date: 2021-10-15
Filing date: 2021-10-15
Publication date: 2023-04-07
Anticipated expiration: 2041-10-15
Also published as: CN113928691A

Abstract

The invention provides a vegetable fresh-keeping device and a vegetable fresh-keeping method, and belongs to the technical field of agricultural product fresh keeping. The fresh-keeping device is characterized in that an inner bag with a first inner cavity is arranged in a second inner cavity of an outer box body, each inner bag is provided with a heat exchanger with a first waterproof breathable film, moisture isolation is achieved, fresh keeping of vegetables is achieved, the inner bag and the outer box body are connected through an air bag, the inner bag is supported through contraction of the air bag, not only can vegetables be prevented from being damaged due to extrusion of the inner bag on the vegetables be prevented, but also the inner bag can be kept in the outer box body all the time to be protected, the protection performance is better, in addition, each inner bag is provided with a heat exchanger with a first waterproof breathable film, each inner bag is connected with an adjustable low-temperature assembly, storage can be conducted according to storage temperatures of different vegetables, different storage is achieved, the problem of different vegetable storage differences at the same temperature is solved, and the vegetable fresh-keeping method uses the vegetable fresh-keeping device, and storage and transportation of the vegetables are facilitated.

Description

Vegetable fresh-keeping device and fresh-keeping method

Technical Field

The invention relates to the technical field of agricultural product preservation, in particular to a vegetable preservation device and a preservation method.

Background

The vegetables are used as an indispensable food source in the life of people, provide nutrition for human bodies and maintain the life activities of the people.

The nutrition of vegetables is changed mostly due to the change of storage time and storage environment, the storage environment is worse and the nutritive value of agricultural products is lower when the storage time is longer, so that the key for maintaining the nutrition is to ensure the freshness of the vegetables.

At present, a common vegetable preservation device in the market is a preservative film, vegetables are wrapped by the preservative film, and meanwhile, the shelf life is prolonged by adopting a low-temperature storage preservation method, so that the loss of nutrition of the vegetables is prevented. However, above-mentioned current vegetable fresh-keeping device is because simple structure, only realized moisture and air isolation, and simultaneously, the protective capacities to vegetables is limited, the problem that the vegetables are crushed easily appears, additionally, in the transportation, only lean on microthermal mode to keep fresh to vegetables, and the shelf life of extension is shorter, application scope is less, the user demand of long shelf life can't be satisfied, and in the transportation, different vegetables are located same great space usually, the temperature of locating is unanimous, but, because different vegetables are different to microthermal requirement, lead to partial vegetables can appear freezing out, and the rotten problem can appear again in partial vegetables, be unfavorable for the storage and the transportation of vegetables.

Disclosure of Invention

Aiming at the problems in the prior art, the vegetable fresh-keeping device and the fresh-keeping method are provided, the vegetables can be protected while moisture is isolated, and the problem that the vegetables are crushed is solved.

The specific technical scheme is as follows:

a vegetable preservation apparatus having the characteristics comprising:

the inner bag is provided with a first inner cavity, and a bag opening communicated with the first inner cavity is formed in the inner bag;

the sealing cover is detachably arranged on the bag opening, and meanwhile, a communication opening is formed in the sealing cover;

the exchanger is detachably arranged in the communication port of the sealing cover and is provided with a first waterproof breathable film;

the outer box body is of a rectangular frame structure and is provided with a second inner cavity, the inner bag is arranged in the second inner cavity, air bags are arranged in the second inner cavity and positioned around the outer box body, the four air bags are respectively arranged around the inner bag and connected with the inner bag, meanwhile, one end of each air bag, which is far away from the inner bag, is respectively connected to the outer box body, and meanwhile, each air bag is provided with a suction nozzle;

the low-temperature assembly comprises an adjusting valve, a diaphragm and a connector, the diaphragm is attached to the inner wall of the inner bag, the connector is installed on the sealing cover, and the adjusting valve is arranged between the connector and the sealing cover.

In the vegetable fresh-keeping device, the sealing pieces are arranged between the sealing cover and the bag opening and between the exchanger and the communication opening.

In the vegetable fresh-keeping device, the membrane is positioned at the position where the inner bag is connected with the air bag.

The vegetable fresh-keeping device is characterized in that a socket is formed in the face, where the bottom of the face is located, of each outer box body, a through groove is formed in the wall body of each outer box body, one end of each through groove is connected with the socket, the other end of each through groove is connected with the connector through a pipeline, meanwhile, a first plug is arranged on the face, where the top of each outer box body is located, of each outer box body, the first plug can be selectively inserted into the socket of the other outer box body, and the first plug is also communicated with the through groove.

The vegetable fresh-keeping device comprises a cold supply device, wherein the cold supply device is provided with a cold supply host and a plurality of cold supply pipes, the plurality of cold supply pipes are connected to the same cold supply host, the plurality of cold supply pipes are arranged at intervals along one direction, each cold supply pipe is provided with a second plug extending out, and the second plugs are detachably connected with sockets on the outer box body.

The vegetable fresh-keeping device comprises a valve body, a second waterproof breathable film and a valve core, wherein the valve body is provided with an inlet, an outlet and a valve channel for communicating the inlet and the outlet, the valve core is arranged in the valve channel and can move in the valve channel, and meanwhile, the second waterproof breathable film is positioned at the inlet of the valve body and seals the inlet.

The utility model provides a foretell vegetable fresh-keeping device, wherein, the case includes the valve plate, the temperature sensing piece, connecting rod and shell fragment, the one end of shell fragment is fixed in on the valve body, the valve plate is located the valve way along the horizontal cunning of valve way, be provided with outstanding connecting block on the valve plate, the both ends of connecting rod are articulated with the other end and the connecting block of shell fragment respectively, and simultaneously, the heat conduction hole of the first inner chamber of intercommunication still has been seted up to the position that just is located the shell fragment is fixed on the valve body, and the heat conduction hole is located the below of shell fragment, the temperature sensing piece inlays to be located in the heat conduction hole, and the one end of temperature sensing piece is supported and is leaned on the shell fragment.

The vegetable fresh-keeping device further comprises a pull rope and a roller, the roller is rotatably arranged outside the valve body, one end of the pull rope penetrates through the valve body and is connected to the elastic piece, the pull rope and the heat-sensitive block are respectively located on two sides of the elastic piece, and the other end of the pull rope is wound on the roller.

The vegetable fresh-keeping device is characterized in that a ratchet wheel assembly is arranged between the roller and the valve body, a ratchet wheel of the ratchet wheel assembly and the roller are coaxially arranged and fixed with each other, and a pawl of the ratchet wheel assembly is arranged on the valve body.

The vegetable preservation method using the vegetable preservation device comprises the following steps:

step S1, initial arrangement;

removing yellow leaves, rotten leaves and rotten roots of the vegetables, and removing silt to obtain qualified vegetables.

S2, filling an inner bag;

opening a sealing cover on the opening of the inner bag, filling qualified vegetables into a first inner cavity of the inner bag, covering the opening with the sealing cover, simultaneously installing a first waterproof breathable film on an exchanger, and installing the exchanger in a communication port of the sealing cover;

s3, opening the bag;

extracting air in each air bag to reduce the volume of the air bag and pull open the inner bag to expand the space of the first inner cavity;

s4, stacking;

stacking a plurality of outer boxes containing the qualified vegetables, inserting the insertion opening on the outer box at the lowest layer onto a second insertion head of a cold supply pipe, simultaneously inserting the insertion opening on the outer box at the upper layer onto a first insertion head on the outer box at the lower layer between two adjacent outer boxes, and adjusting the corresponding adjusting valve on each outer box according to the optimal preservation temperature of the corresponding qualified vegetables;

s5, maintaining fresh;

the cooling main machine is started and supplies cooling air to each outer box.

The positive effects of the technical scheme are as follows:

in addition, each inner bag is provided with an exchanger with a first waterproof breathable film, moisture isolation is carried out on the vegetables, the shelf life of the vegetables is prolonged, and each inner bag is provided with an adjustable low-temperature assembly, the vegetables can be stored separately according to the storage temperatures of different vegetables, the problem of different vegetable storage differences at the same temperature is prevented, and the vegetable storage and transportation are facilitated.

Drawings

FIG. 1 is a block diagram of an embodiment of a vegetable fresh-keeping apparatus according to the present invention;

FIG. 2 is a schematic diagram of an outer case according to a preferred embodiment of the present invention;

FIG. 3 is a block diagram of a regulator valve according to a preferred embodiment of the present invention;

fig. 4 is a flowchart of a method for keeping vegetables fresh according to the present invention.

In the drawings: 1. an inner bag; 11. sealing the cover; 12. an exchanger; 121. a first waterproof breathable film; 2. an outer case; 21. an air bag; 22. a socket; 23. a through groove; 24. a first plug; 211. a suction nozzle; 3. a cryogenic component; 31. adjusting the valve; 32. a connector; 311. a valve body; 312. a second waterproof breathable film; 313. a valve core; 3111. a heat conduction hole; 3131. a valve plate; 3132. a heat-sensitive block; 3133. a connecting rod; 3134. a spring plate; 3135. a cable; 3136. a roller; 3137. a ratchet assembly; 4. a cooling device; 41. a cooling main machine; 42. a cold supply pipe; 421. a second plug.

Detailed Description

In order to make the technical means, the creation features, the achievement purposes and the effects of the present invention easy to understand, the following embodiments specifically describe the technical solutions provided by the present invention with reference to fig. 1 to 4, but the following contents are not to be taken as limitations of the present invention.

FIG. 1 is a block diagram of an embodiment of a vegetable fresh-keeping apparatus according to the present invention; FIG. 2 is a structural diagram of an outer case according to a preferred embodiment of the present invention. As shown in fig. 1 and fig. 2, the vegetable fresh-keeping device provided in this embodiment includes: the inner bag 1, the sealing cover 11, the exchanger 12, the outer box 2 and the low-temperature component 3 are adopted, and the vegetable fresh-keeping device is used in the vegetable fresh-keeping method.

Specifically, inner bag 1 has first inner chamber, places vegetables through first inner chamber, and at this moment, set up the sack of the first inner chamber of intercommunication on the inner bag 1, the vegetables of placing in first inner chamber pass through the sack business turn over, pack into and take out more conveniently, also provide the condition for follow-up operations such as ventilative, lock water through the sack in addition.

Specifically, the sealing cover 11 is detachably mounted on the bag opening, that is, the opening and closing of the bag opening of the inner bag 1 are realized through the sealing cover 11, and conditions are provided for the preservation of the vegetables in the first inner cavity of the inner bag 1. Meanwhile, the sealing cover 11 is provided with a communication port, which provides conditions for the subsequent operations of ventilation, water locking and the like of the inner bag 1.

Specifically, interchanger 12 demountable installation is in the intercommunication mouth of closing cap 11, the intercommunication mouth through on the closing cap 11 provides the mounted position for interchanger 12 promptly, and simultaneously, interchanger 12 has first waterproof ventilated membrane 121, through first waterproof ventilated membrane 121 on interchanger 12 promptly, can realize pinning to the moisture in the first inner chamber of inner bag 1, prevent that vegetables from influencing its fresh degree because of the dehydration, in addition, can also realize ventilative, further prolonged the shelf life of vegetables, fresh-keeping effect is better.

Specifically, outer box 2 is the frame construction of rectangle, and outer box 2 is provided with a plurality of, and a plurality of outer box 2 is placed with piling up, convenient storage and transportation. Moreover, each outer box body 2 is provided with a second inner cavity, and an inner bag 1 is arranged in the second inner cavity of each outer box body 2, so that each inner bag 1 is supported and protected by the corresponding outer box body 2, the independence is better, and conditions are provided for subsequent independent regulation and control of storage temperature. In addition, an airbag 21 is disposed around the outer box 2 in the second inner cavity, and the four airbags 21 are disposed around the inner bag 1 and connected to the inner bag 1, and meanwhile, one end of each airbag 21 departing from the outer box 2 is connected to the outer box 2, so that the corresponding airbag 21 is pulled around the inner bag 1, and the inner bag 1 is stressed more uniformly, and in addition, a suction nozzle 211 is disposed on each airbag 21, and the air in the airbag 21 is sucked out through the suction nozzle 211, so that the corresponding airbag 21 is reduced in volume, thereby pulling the inner bag 1 open, and the first inner cavity of the inner bag 1 is expanded, thereby avoiding the problem that the vegetables placed in the inner bag 1 are damaged by the inner bag 1 due to extrusion, further maintaining the freshness of the vegetables, and when the inner bag 1 is expanded by drawing the gas in the airbag 21, the airbag 21 itself can be completely retracted into the outer box 2, thereby preventing the problem that the airbag 21 is damaged due to collision or other external factors in the storage or transportation process, and preventing the problem that the airbag 21 from being damaged by external impact during the outer box 2, and the damage of the vegetable can be further prevented, and the outer box 2 can be damaged by the buffer airbag 21, and the buffer and the problem that the outer box can be damaged by the vegetable can be further prevented from being removed, and the vegetable during the storage or transportation process of the vegetable.

Specifically, low temperature component 3 includes regulating valve 31 again, diaphragm and connector 32, at this moment, cover the diaphragm subsides on the inner wall of inner bag 1, realize the parcel to the first inner chamber of inner bag 1 through the diaphragm, realize thermal-insulated, prevent that follow-up air conditioning that maintains low temperature storage from scattering and disappearing from inner bag 1 too fast, and connector 32 is installed on closing cap 11, and be provided with regulating valve 31 between connector 32 and the closing cap 11, make things convenient for follow-up pipe connection that carries on through connector 32, and can realize the regulation to temperature in each inner bag 1 through setting up regulating valve 31, thereby realize according to different vegetables independent control storage temperature, prevent that the problem of difference appears in the different vegetables under the same storage temperature, more do benefit to the storage and the transportation of vegetables.

More specifically, all be provided with the sealing member between closing cap 11 and the sack and between interchanger 12 and the intercommunication mouth, realized between closing cap 11 and the sack and interchanger 12 and the intercommunication mouth sealed through the sealing member, prevented that above-mentioned junction from appearing leaking and influencing the problem of preserving, not only reduced the energy consumption, reduced energy loss, can also further prolong the shelf life of vegetables.

More specifically, the diaphragm is located at the position where the inner bag 1 is connected to the airbag 21, that is, the diaphragm is located at the position where the inner bag 1 is supported by the airbag 21 through the fixed position of the diaphragm in the inner bag 1, so that the structural strength is higher, and the stability and reliability of the diaphragm in the inner bag 1 are ensured.

More specifically, socket 22 has all been seted up on each outer box 2 and being located the face at its bottom place, this moment, logical groove 23 has been seted up in the wall body of outer box 2, and, the one end that leads to groove 23 is connected with socket 22, the air conditioning that gets into through socket 22 promptly can enter into logical groove 23, carry out the transmission of air conditioning in outer box 2 through leading to groove 23, the built-in of air conditioning transport passageway has been realized, need not to set up the connecting tube in addition, it is inconvenient not only to have avoided establishing the installation that the connecting tube leads to in addition, arrange the chaotic problem, neatness has been improved, in addition can also make the distance of the transport passageway of air conditioning minimize, thereby avoid the problem of air conditioning excessive loss in output process. In addition, the other end of the through slot 23 is connected to the connecting head 32 through a pipeline, that is, the cold air delivered through the through slot 23 can be delivered to the connecting head 32 on the cover 11 of the inner bag 1 through a pipeline, so as to provide cold air for the corresponding first inner cavity of the inner bag 1, maintain a low-temperature storage environment, and control the amount of cold air entering the first inner cavity by adjusting the valve 31, thereby realizing adjustment of the storage temperature. Meanwhile, a first plug 24 is arranged on each outer box 2 and on the surface where the top of the outer box 2 is located, and the first plug 24 can be selectively inserted into the socket 22 of another outer box 2, and the first plug 24 is also communicated with the through groove 23, so that the cold air in the through groove 23 can also enter the first plug 24, and cold air transportation is realized through the first plug 24, so that when a plurality of outer boxes 2 are stacked, between two adjacent outer boxes 2, the socket 22 at the bottom of the outer box 2 above can be inserted into the first plug 24 at the top of the outer box 2 below, and the communication of the through groove 23 on the two adjacent outer boxes 2 is realized, so that a condition is provided for cooling the inner bag 1 in each outer box 2, and no additional connecting pipeline is needed, so that the use is more convenient.

More specifically, a cooling device 4 is further provided, the cooling device 4 is arranged in a cold storage, and the cold storage can be a cold storage on a transport vehicle or a warehouse. At this time, the cooling device 4 further includes a cooling main machine 41 and a plurality of cooling pipes 42, and the plurality of cooling pipes 42 are all connected to the same cooling main machine 41, so that a machine with multiple purposes is realized, and the cost is saved. And, a plurality of confession cold pipe 42 are arranged along a direction interval, a plurality of confession cold pipe 42 intervals are arranged on the bottom plate of freezer, and simultaneously, each confession cold pipe 42 all has a second plug 421 that stretches out, and second plug 421 can be dismantled with the socket 22 on the outer box 2 and be connected, make when piling up outer box 2 in the freezer, can directly stack outer box 2 on the bottom plate of freezer, make second plug 421 can insert in socket 22 can, need not to set up connecting tube in addition, and convenient for operation, the space is clean and tidy. It should be noted that the cooling main unit 41 may be a refrigeration device already used in the market, such as a refrigeration pipeline in a refrigerator or the like, and will not be described herein again.

Fig. 3 is a structural diagram of a regulating valve according to a preferred embodiment of the present invention. As shown in fig. 3, the adjusting valve 31 for adjusting the temperature in the first inner cavity of each inner bag 1 further includes a valve body 311, a second waterproof air-permeable membrane 312 and a valve core 313, at this time, the valve body 311 has an inlet, an outlet and a valve channel communicating the inlet and the outlet, the valve core 313 is disposed in the valve channel and can move in the valve channel, and the opening and closing control of the valve channel and the control of the opening size of the valve channel are realized by the movement of the valve core 313, so that the amount of cold air passing through the valve channel is adjusted, the amount of cold air entering the inner bag 1 is controlled, and the temperature adjustment is realized. Meanwhile, the second waterproof and breathable membrane 312 is located at the inlet of the valve body 311 and seals the inlet, so that only cold air enters the inner bag 1, and moisture and the like are prevented from excessively entering the inner bag 1, thereby preventing the problem that the storage environment of vegetables in the inner bag 1 is changed due to the need of setting a low-temperature environment, and further maintaining the freshness of the vegetables.

More specifically, the valve spool 313 further includes a valve plate 3131, a heat sensitive block 3132, a connecting rod 3133, and a resilient plate 3134, one end of the resilient plate 3134 is fixed on the valve body 311, the valve plate 3131 is slidably disposed in the valve passage along a transverse direction of the valve passage, a protruding connecting block is disposed on the valve plate 3131, and two ends of the connecting rod 3133 are respectively hinged to the other end of the resilient plate 3134 and the connecting block, so that when the resilient plate 3134 is displaced in the valve body 311, the resilient plate 3134 can drive the valve plate 3131 to move in the valve passage through the connecting rod 3133 and the connecting block, thereby controlling an amount of cold air passing through the valve passage. Meanwhile, a heat conduction hole 3111 communicating with the first inner cavity is further formed in the valve body 311 at a position fixed by the elastic sheet 3134, the heat conduction hole 3111 is located below the elastic sheet 3134, the thermal block 3132 is embedded in the heat conduction hole 3111, and one end of the thermal block 3132 abuts against the elastic sheet 3134, so that after the temperature in the first inner cavity of the inner bag 1 changes, the thermal block 3132 directly contacts the air in the first inner cavity through the heat conduction hole 3111, so that when the temperature in the first inner cavity changes, the thermal block 3132 can expand with heat and contract with cold, so that when the temperature rises, the volume of the thermal block 3132 expands and pushes the elastic sheet 3134 open, so that the elastic sheet 4 drives the valve plate 3131 to further open the valve channel, the amount of cold air passing through the valve channel is increased, so that the temperature in the first inner cavity is reduced, the low-temperature environment of vegetables is maintained stable, and when the temperature rises, the volume of the thermal block 3132 is reduced, so that the elastic sheet 4 retracts, the valve plate 3131 further closes, the temperature in the valve channel is further closed, the temperature of the vegetables is maintained, and the problem of the vegetables is also solved, and the problem of vegetables is that the vegetable freshness-keeping temperature of the vegetables. It is noted that the thermo-sensitive block 3132 can be one of the single metals, alloys and plastics which are sensitive to temperature and solid in the market, and it is sufficient that the volume of the thermo-sensitive block expands with heat and contracts with cold when the temperature changes, which will not be described herein.

More specifically, the adjusting valve 31 further includes a cable 3135 and a roller 3136, wherein the roller 3136 is rotatably disposed outside the valve body 311, such that the roller 3136 can rotate on the valve body 311, and one end of the cable 3135 passes through the valve body 311 and is connected to the spring 3134, and the cable 3135 and the heat-sensitive block 3132 are respectively disposed at two sides of the spring 3134, i.e., the spring 3134 can be pulled by the cable 3135 to move, and at the same time, the cable 3135 can counteract the thermal expansion and contraction effects of the heat-sensitive block 3132, and the other end of the cable 3135 is wound around the roller 3136, such that a user can control the deformation of the spring 3134 by rotating the roller 3136, and thus, the manual control of the amount of cold air passing through the valve passage is achieved, and a condition is provided for the user to manually set the amount of cold air passing through the adjusting valve 31 according to vegetables placed in the inner bag 1.

More specifically, a ratchet assembly 3137 is further disposed between the roller 3136 and the valve body 311, a ratchet of the ratchet assembly 3137 and the roller 3136 are coaxially disposed and fixed to each other, and a pawl of the ratchet assembly 3137 is disposed on the valve body 311, so that a user may temporarily fix the roller 3136 through the ratchet assembly 3137, and the problem of adjustment failure caused by rotation and resetting of the roller 3136 under a restoring force of the elastic sheet 3134 is prevented, and the structural design is more reasonable.

In addition, the embodiment also provides a vegetable preservation method, and the vegetable preservation device is utilized. Fig. 4 is a flowchart of a method for preserving vegetables according to the present invention, and as shown in fig. 4, the method for preserving vegetables according to the present embodiment includes the following steps:

step S1, initial arrangement;

removing yellow leaves, rotten leaves and rotten roots of the vegetables, and removing silt to obtain qualified vegetables for later use.

Step S2, filling the inner bag 1;

and (3) opening the sealing cover 11 on the opening of the inner bag 1, filling the qualified vegetables into the first inner cavity of the inner bag 1, covering the opening of the sealing cover 11, meanwhile, installing the first waterproof and breathable film 121 on the exchanger 12, and installing the exchanger 12 in the communication port of the sealing cover 11, thereby completing the work of filling the qualified vegetables into the inner bag 1.

S3, opening the bag;

air in each air bag 21 is extracted by air extraction equipment, so that the volume of each air bag 21 is reduced, the inner bag 1 is pulled open, the space of the first inner cavity is expanded, vegetables placed in the inner bag 1 are prevented from being extruded by the inner bag 1, and the shelf life of the vegetables is prolonged.

S4, stacking;

pile up a plurality of outer box 2 that have qualified vegetables, insert the socket 22 on the outer box 2 of lower floor on the second plug 421 of cooling pipe 42, and simultaneously, between two adjacent outer box 2, be located the outer box 2 of upper strata on the socket 22 inserts on the first plug 24 that is located the outer box 2 of lower floor, realize stacking in the freezer of a plurality of outer boxes 2, and realized the intercommunication of air conditioning passageway, and convenient operation, and adjust the adjusting valve 31 that corresponds on each outer box 2 according to the best save temperature of the qualified vegetables that corresponds, realize the difference storage to different vegetables, prevent the problem of the difference is preserved to different vegetables because the unified different vegetables that leads to of storage temperature, more do benefit to the storage and the transportation of vegetables.

S5, maintaining fresh;

the cooling main machine 41 is started, and the cooling air is supplied to each outer box 2 through the cooling main machine 41, so that the multi-purpose of one machine is realized, and the use cost is reduced.

The vegetable fresh-keeping device and the fresh-keeping method provided by the embodiment, the fresh-keeping device is characterized in that an inner bag 1 with a first inner cavity is arranged in a second inner cavity of an outer box body 2, each inner bag 1 is provided with an exchanger 12 with a first waterproof breathable film 121, moisture isolation is realized, vegetable fresh keeping is realized, the inner bag 1 and the outer box body 2 are connected through an air bag 21, the inner bag 1 is supported through contraction of the air bag 21, vegetables can be prevented from being damaged due to vegetable extrusion through the inner bag 1, the inner bag 1 can be kept within the range of the outer box body 2 all the time and can be protected, the protection performance is better, in addition, each inner bag 1 is provided with the exchanger 12 with the first waterproof breathable films 121, each inner bag 1 is connected with an adjustable low-temperature assembly 3, the inner bags can be stored separately according to the storage temperatures of different vegetables, different storage is realized, the problem of different vegetable storage differences at the same temperature is prevented, and the vegetable fresh-keeping method uses the vegetable fresh-keeping device to be more beneficial to storage and transportation of the vegetables.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.

Claims

1. A vegetable preservation device, comprising:

an exchanger detachably mounted in the communication port of the cover, the exchanger having a first waterproof, breathable membrane;

the outer box body is of a rectangular frame structure and is provided with a second inner cavity, the inner bag is arranged in the second inner cavity, an air bag is arranged in the second inner cavity and positioned around the outer box body, the four air bags are respectively arranged around the inner bag and connected with the inner bag, meanwhile, one end of each air bag, which is deviated from and connected with the inner bag, is respectively connected to the outer box body, and meanwhile, a suction nozzle is arranged on each air bag;

the low-temperature assembly comprises an adjusting valve, a diaphragm and a connector, the diaphragm is attached to the inner wall of the inner bag, the connector is mounted on the sealing cover, and the adjusting valve is arranged between the connector and the sealing cover;

sealing elements are arranged between the sealing cover and the bag opening and between the exchanger and the communication opening;

the membrane is positioned at the position where the inner bag is connected with the air bag;

each outer box is last just to be located and has seted up the socket on the face at its bottom place, logical groove has been seted up in the wall body of outer box, the one end that leads to the groove with the socket is connected, the other end with the connector passes through the pipe connection, simultaneously, each outer box is last and be located and be provided with first plug on the face at its top place, first plug alternative inserts to another outer box in the socket, and, first plug equally with lead to the groove intercommunication.

2. The vegetable fresh-keeping device according to claim 1, further comprising a cooling device, wherein the cooling device comprises a cooling main unit and a plurality of cooling pipes, the plurality of cooling pipes are connected to the same cooling main unit, the plurality of cooling pipes are arranged at intervals along a direction, each cooling pipe is provided with a second plug extending out, and the second plug is detachably connected with the socket on the outer box body.

3. A vegetable fresh-keeping device as claimed in claim 2, wherein the adjusting valve comprises a valve body, a second waterproof air-permeable membrane and a valve core, the valve body has an inlet, an outlet and a valve channel communicating the inlet and the outlet, the valve core is disposed in the valve channel and movable in the valve channel, and the second waterproof air-permeable membrane is disposed at the inlet of the valve body and seals the inlet.

4. The vegetable fresh-keeping device according to claim 3, characterized in that the valve core comprises a valve plate, a heat-sensitive block, a connecting rod and an elastic sheet, one end of the elastic sheet is fixed on the valve body, the valve plate is slidably arranged in the valve channel along the transverse direction of the valve channel, a protruding connecting block is arranged on the valve plate, two ends of the connecting rod are respectively hinged with the other end of the elastic sheet and the connecting block, meanwhile, a heat-conducting hole communicated with the first inner cavity is further formed in the valve body and located at the position where the elastic sheet is fixed, the heat-conducting hole is located below the elastic sheet, the heat-sensitive block is embedded in the heat-conducting hole, and one end of the heat-sensitive block abuts against the elastic sheet.

5. A vegetable fresh-keeping device according to claim 4, characterized by further comprising a pull rope and a roller, wherein the roller is rotatably arranged outside the valve body, one end of the pull rope penetrates through the valve body and is connected to the elastic piece, the pull rope and the heat-sensitive block are respectively positioned on two sides of the elastic piece, and the other end of the pull rope is wound on the roller.

6. A vegetable fresh-keeping device according to claim 5, characterized in that a ratchet wheel assembly is arranged between the roller and the valve body, a ratchet wheel of the ratchet wheel assembly and the roller are coaxially arranged and fixed with each other, and a pawl of the ratchet wheel assembly is arranged on the valve body.

7. A method for keeping vegetables fresh by using the vegetable fresh-keeping device of claim 6, comprising the steps of:

step S1, initial arrangement;

removing yellow leaves, rotten leaves and rotten roots of the vegetables, and removing silt to obtain qualified vegetables;

s2, filling an inner bag;

opening the sealing cover on the opening of the inner bag, loading the qualified vegetables into the first inner cavity of the inner bag, covering the opening with the sealing cover, and meanwhile, installing the first waterproof breathable film on the exchanger, and installing the exchanger in the communication port of the sealing cover;

s3, opening the bag;

extracting air in each air bag, reducing the volume of the air bag, pulling the inner bag open, and expanding the space of the first inner cavity;

s4, stacking;

stacking a plurality of outer boxes containing the qualified vegetables, inserting the insertion opening on the outer box at the lowest layer onto the second plug of the cold supply pipe, inserting the insertion opening on the outer box at the upper layer onto the first plug on the outer box at the lower layer between two adjacent outer boxes, and adjusting the corresponding adjusting valve on each outer box according to the optimal storage temperature of the corresponding qualified vegetables;

s5, maintaining fresh;

and starting the cooling main machine and supplying cooling air to each outer box body.