CN114194582B

CN114194582B - Air conditioning storage device for fruits

Info

Publication number: CN114194582B
Application number: CN202210154144.7A
Authority: CN
Inventors: 张莉; 刘丽丽; 王青松; 韩文立; 冀维胜
Original assignee: Shandong Joywin Green Agriculture Development Co ltd
Current assignee: Shandong Joywin Green Agriculture Development Co ltd
Priority date: 2022-02-21
Filing date: 2022-02-21
Publication date: 2022-05-17
Anticipated expiration: 2042-02-21
Also published as: CN114194582A

Abstract

The invention relates to the technical field of fruit preservation, and provides a fruit controlled atmosphere storage device, which comprises a humidifying tank and a storage box which are connected in a circulating manner; a plurality of layers of object carrying partition plates are arranged in the storage box; the top of the storage box is provided with a gas storage bottle, and liquid carbon dioxide is filled in the gas storage bottle; a refrigerant inlet pipe and a refrigerant outlet pipe are vertically inserted into the storage box; the side wall of the storage box is provided with an exhaust pipe which is connected with an air pump; an air inlet column is inserted in the humidifying tank; one end of the air inlet column, which is positioned outside the tank, is connected with a booster pump, and the booster pump is connected with a second air duct; an air outlet pipe is arranged on the side wall of the humidifying tank; the air outlet pipe is connected with the first air duct. Therefore, the invention utilizes the liquid carbon dioxide to cool the storage box, and the gasified carbon dioxide enters the humidifying tank to be humidified and then enters the storage box, thereby improving the humidity in the box, reducing the oxygen content in the box and inhibiting the respiration of fruits. In addition, the low-temperature environment in the box greatly prolongs the fresh-keeping period of the fruits and improves the fresh-keeping effect.

Description

Air-conditioning storage device for fruits

Technical Field

The invention belongs to the technical field of fruit preservation, and particularly relates to a fruit controlled atmosphere storage device.

Background

With the development of economy, the living standard of people is continuously improved, and the consumption of various fruits and fruit products is increased year by year. In addition to the increase in volume, there is also a high demand for quality. For fruit processing enterprises, effective preservation of fruits as raw materials becomes a key link for ensuring product quality.

At present, the preservation method of fruits is mature, for example, Chinese patent 201710003307.0 discloses a method for preserving fruits and vegetables by using dry ice in modified atmosphere transportation. The method reduces the oxygen content by adjusting the atmosphere so as to inhibit the respiration of the fruits and further prolong the preservation period. However, there is currently a lack of effective equipment.

In view of the above, the prior art is obviously inconvenient and disadvantageous in practical use, and needs to be improved.

Disclosure of Invention

In view of the above-mentioned drawbacks, it is an object of the present invention to provide a controlled atmosphere storage apparatus for fruits, which reduces the temperature of the storage tank by using liquid carbon dioxide, humidifies the gasified carbon dioxide in a humidifying tank, and then feeds the humidified carbon dioxide into the storage tank, thereby increasing the humidity of the storage tank, reducing the oxygen content in the storage tank, and suppressing the respiration of the fruits. In addition, the low-temperature environment in the box greatly prolongs the fresh-keeping period of the fruits and improves the fresh-keeping effect.

In order to achieve the purpose, the invention provides a fruit controlled atmosphere storage device which comprises a humidifying tank and a storage box which are mutually and circularly connected through a first air duct and a second air duct;

a plurality of layers of carrying partition plates are arranged in the storage box; the top of the storage box is provided with a gas storage bottle, and liquid carbon dioxide is filled in the gas storage bottle; a refrigerant inlet pipe and a refrigerant outlet pipe are vertically inserted into the storage box; the refrigerant inlet pipe is connected with the gas storage bottle, and the refrigerant outlet pipe is connected with the second gas guide pipe;

air holes are uniformly distributed on the carrying partition plate; a refrigerating pipe is arranged on the downward surface of the carrying partition plate; the inlet end of the refrigerating pipe is connected to the pipe body of the refrigerant inlet pipe, and the outlet end of the refrigerating pipe is connected to the pipe body of the refrigerant outlet pipe;

an exhaust pipe is arranged on the side wall of the storage box and is connected with an air pump;

an air adjusting pipe group is arranged between the lowest layer of the loading partition plate and the bottom of the storage box; the air adjusting pipe group is connected with the first air guide pipe;

the air regulating pipe group comprises 5-7 annular pipes and a main air pipe which are concentrically arranged from outside to inside; the pipe body of the main air pipe is connected with the branch air pipes with the same number as the annular pipes in parallel, and each branch air pipe is connected with the corresponding annular pipe; the pipe body of the annular pipe is also provided with a plurality of exhaust holes with upward openings; the main air pipe is connected with the first air duct;

an air inlet column is inserted into the humidifying tank; one end of the air inlet column, which is positioned outside the tank, is connected with a booster pump, and the booster pump is connected with a second air duct; an air outlet pipe is arranged on the side wall of the humidifying tank; the air outlet pipe is connected with the first air guide pipe;

one end of the air inlet column extending into the tank is connected with the transverse air pipe; the tube body of the transverse air tube is connected with a plurality of air outlet heads; a rotary drum is arranged in the gas outlet head, and two ends of the rotary drum are respectively coaxially connected with a drum shaft; the cylinder shaft is rotatably connected on the end face of the gas outlet head in a penetrating manner; a plurality of shaft blades are arranged on the shaft body at one end of the cylinder shaft, which is positioned outside the air outlet head; a plurality of drum blades are uniformly and annularly arranged on the drum body of the rotating drum; and the end surface of the gas outlet head is also uniformly provided with gas outlet holes.

According to the fruit controlled atmosphere storage device, a vacuum meter is inserted into the top of the storage box.

According to the fruit modified atmosphere storage device, the number of the loading partition plates is 3-5.

According to the fruit controlled atmosphere storage device, the pipe diameters of the annular pipes are reduced from outside to inside in sequence.

According to the fruit modified atmosphere storage device, at least two transverse air pipes are arranged.

According to the fruit controlled atmosphere storage device, each transverse air pipe is provided with 3-5 air outlet heads.

According to the fruit controlled atmosphere storage device, a pressure switch valve is connected between the air outlet pipe and the first air guide pipe.

According to the fruit controlled atmosphere storage device, the pressure switch valve comprises a valve body, and an air inlet channel and an air outlet channel are arranged in the valve body; the air inlet channel and the air outlet channel are respectively connected with an air outlet pipe and a first air duct; a switch cavity is formed between the air inlet channel and the air outlet channel, and a hemispherical plug is arranged in the switch cavity; the spherical cambered surface of the hemispherical plug faces the air inlet channel; at least two guide rods are arranged on the plane of the plug, and guide holes are correspondingly formed in the side wall of the switch cavity; and the guide rod is sleeved with a return spring.

The invention aims to provide a fruit modified atmosphere storage device, which utilizes liquid carbon dioxide to cool a storage box, and the gasified carbon dioxide enters a humidifying tank to be humidified and then enters the storage box, so that the humidity in the box is improved, the oxygen content in the box is reduced, and the respiration of fruits is inhibited. In addition, the low-temperature environment in the box greatly prolongs the fresh-keeping period of the fruits and improves the fresh-keeping effect.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the structure of the humidification tank of FIG. 1;

FIG. 3 is a schematic structural diagram of the region B in FIG. 2;

FIG. 4 is a schematic view of the structure of FIG. 3 in the direction C;

FIG. 5 is a schematic view of the structure of FIG. 3 in the direction D-D;

FIG. 6 is a schematic structural view of the region A in FIG. 2;

FIG. 7 is a schematic view of an operating state of the pressure switching valve of FIG. 6;

FIG. 8 is a schematic view of the storage tank of FIG. 1;

FIG. 9 is a top plan view of the stack of air accommodating tubes of FIG. 8;

FIG. 10 is a schematic view of the structure of FIG. 9 in the direction G-G;

FIG. 11 is a schematic view of the structure of FIG. 8 in the direction E;

FIG. 12 is a schematic view of the structure of FIG. 8 in the direction F;

in the figure: 1-air inlet column, 11-booster pump, 12-horizontal air pipe, 13-air outlet pipe, 14-air outlet head and 141-air outlet hole; 15-drum, 151-drum shaft, 152-shaft blade, 153-drum blade; 2-gas cylinder, 21-refrigerant inlet pipe, 22-refrigerant outlet pipe, 23-air pump, 24-vacuum meter, 25-refrigeration pipe; 3-air adjusting pipe group, 31-carrying partition board, 311-air passing hole; 4-main gas pipe, 41-annular pipe, 411-exhaust hole; 42-bronchus; 5-a valve body, 51-an air inlet channel, 52-an air outlet channel, 53-a plug, 531-a guide rod and 532-a return spring; 54-a pilot hole; 100-a humidifying tank, 200-a first air duct, 201-a second air duct; 300-storage box.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and embodiments, it being understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Referring to fig. 1, the present invention provides a fruit modified atmosphere storage device, comprising a humidifying tank 100 and a storage box 300 which are connected with each other by a first air duct 200 and a second air duct 201 in a circulating manner;

referring to fig. 8, a plurality of layers of loading partitions 31 are arranged in the storage box 300; the top of the storage box 300 is provided with a gas storage bottle 2, and liquid carbon dioxide is filled in the gas storage bottle 2; a refrigerant inlet pipe 21 and a refrigerant outlet pipe 22 are also vertically inserted into the storage box 300; the refrigerant inlet pipe 21 is connected with the gas storage cylinder 2, and the refrigerant outlet pipe 22 is connected with the second gas guide pipe 201;

referring to fig. 11, the loading partition plate 31 is uniformly provided with air holes 311; referring to fig. 12, a refrigerating pipe 25 is arranged on the downward surface of the carrying partition plate 31; the inlet end of the refrigerating pipe 25 is connected to the pipe body of the refrigerant inlet pipe 21, and the outlet end of the refrigerating pipe is connected to the pipe body of the refrigerant outlet pipe 22;

fruits are placed on the carrying partition plate 31. The liquid carbon dioxide enters from the refrigerant inlet pipe 21 and enters into each layer of the refrigeration pipes 25 respectively to be gasified and absorb heat, so as to reduce the temperature inside the object carrying partition plate 31 and the storage box 300, and the fruits are kept at low temperature. The gasified carbon dioxide is collected in the refrigerant outlet pipe 22 and then sent to the humidification tank 100 through the second gas duct 201.

An exhaust pipe is arranged on the side wall of the storage box 300 and is connected with an air suction pump 23; the air pump 23 pumps out the gas in the tank to maintain the internal vacuum degree; a vacuum meter 24 is inserted into the top of the storage box 300; and monitoring whether the vacuum degree in the box is within a preset range in real time.

The number of the loading partition boards 31 is set adaptively according to actual needs, for example, 3-5 layers are set.

The air adjusting pipe group 3 is arranged between the lowest loading partition plate 31 and the bottom of the storage box 300; the air adjusting pipe group 3 is connected with a first air duct 200;

referring to fig. 9, the air regulating tube group 3 comprises 5-7 annular tubes 41 and a main air tube 4 which are concentrically arranged from outside to inside; referring to fig. 10, the main tube body of the main tube 4 is provided with a number of branch tubes 42 in parallel, which is the same as the number of the annular tubes 41, and each branch tube 42 is connected with the corresponding annular tube 41; a plurality of vent holes 411 with upward openings are further formed in the tube body of the annular tube 41; the main air pipe 4 is connected with a first air duct 200;

the gas flowing out from the humidification tank 100 enters each annular pipe 41 through the main gas pipe 4 and enters the tank through the exhaust holes 411; the humidity is kept by providing water vapor for the box, and part of the water vapor is condensed into liquid in the box in the rising process of the gas due to the lower temperature in the box. Part of the gas is pumped out to maintain the negative pressure in the tank.

Because the gas flow rates of the outer annular pipe 41 and the inner annular pipe 41 are different, the pipe diameters of the annular pipes 41 are reduced from outside to inside as an example;

the air pump 23 can work continuously according to the preservation requirement, and can be started at fixed time or according to the specific situation of the negative pressure in the tank.

Referring to fig. 2, an air inlet column 1 is inserted into the humidification tank 100; one end of the air inlet column 1, which is positioned outside the tank, is connected with a booster pump 11, and the booster pump 11 is connected with a second air duct 201; an air outlet pipe 13 is arranged on the side wall of the humidifying tank 100; the air outlet pipe 13 is connected with the first air guide pipe 200;

one end of the air inlet column 1 extending into the tank is connected with a transverse air pipe 12; referring to fig. 3, a plurality of air outlets 14 are connected to the body of the transverse air pipe 12; the gas outlet head 14 is internally provided with a rotary drum 15, and two ends of the rotary drum 15 are respectively coaxially connected with a drum shaft 151; the cylinder shaft 151 is rotatably connected to the end face of the air outlet head 14 in a penetrating manner; referring to fig. 4, a plurality of shaft blades 152 are disposed on the shaft body of the end of the cylindrical shaft 151 extending out of the air head 14; referring to fig. 5, a plurality of drum blades 153 are uniformly arranged on the drum body of the rotating drum 15; the end surface of the air outlet head 14 is also uniformly provided with air outlet holes 141;

preferably, the number of the transverse air pipes 12 is at least two; furthermore, each transverse air pipe 12 is provided with 3-5 air outlet heads 14;

the humidifying tank 100 is filled with water, and gas enters the gas outlet head 14 from the transverse gas pipe 12 to push the rotating drum 15 to rotate. The air enters the water body from the air outlet hole 141, is fully mixed with the water body under the stirring of the shaft blade 152, and flows out from the air outlet pipe 13 after the humidity is improved, and enters the storage box 300 through the first air guide pipe 200.

The humidified carbon dioxide enters the storage tank 300, so that the humidity in the tank is increased, the oxygen content in the tank is reduced, and the respiration of fruits is inhibited. In addition, the low-temperature environment in the box greatly prolongs the fresh-keeping period of the fruits and improves the fresh-keeping effect.

Preferably, in order to keep the parameters in the tank stable, the gas is prevented from entering the tank when the suction pump 23 is not turned on. A pressure switch valve is also connected between the air outlet pipe 13 and the first air duct 200. When the air pump 23 is not turned on, the pressure switch valve is turned off; when the air pump 23 is operated, the pressure switch valve is turned on.

Referring to fig. 6, the pressure switch valve includes a valve body 5, and an inlet channel 51 and an outlet channel 52 are arranged in the valve body 5; the air inlet channel 51 and the air outlet channel 52 are respectively connected with the air outlet pipe 13 and the first air duct 200; a switch cavity is formed between the air inlet channel 51 and the air outlet channel 52, and a hemispherical plug 53 is arranged in the switch cavity; the spherical arc surface of the hemispherical plug 53 faces the air inlet 51; at least two guide rods 531 are arranged on the plane of the plug 53, and guide holes 54 are correspondingly formed in the side wall of the switch cavity; a return spring 532 is sleeved on the guide rod 531;

when the air pump 23 is not started, the plug 53 is ejected out by the return spring 532, and the spherical arc surface of the plug seals the air inlet 51.

Referring to fig. 7, when the suction pump 23 is turned on, the pressure difference between the inlet passage 51 and the outlet passage 52 pushes the stopper 53 open, and the air flows out of the outlet passage 52 into the storage container 300.

In summary, the invention provides an air-conditioned fruit storage device, which utilizes liquid carbon dioxide to cool the interior of a storage box, and the gasified carbon dioxide enters a humidifying tank for humidifying and then enters the storage box, so that the humidity in the box is improved, the oxygen content in the box is reduced, and the respiration of fruits is inhibited. In addition, the low-temperature environment in the box greatly prolongs the fresh-keeping period of the fruits and improves the fresh-keeping effect.

The present invention is capable of other embodiments, and various changes and modifications can be made by one skilled in the art without departing from the spirit and scope of the invention.

Claims

1. A fruit controlled atmosphere storage device is characterized by comprising a humidifying tank and a storage box which are connected with each other in a circulating way through a first air duct and a second air duct;

2. A fruit modified atmosphere storage device as claimed in claim 1 wherein a vacuum gauge is also inserted at the top of the storage box.

3. The controlled atmosphere storage device of claim 1, wherein the number of layers of the loading partition plates is 3-5.

4. The controlled atmosphere storage device of claim 1, wherein the diameter of each annular tube decreases from outside to inside.

5. The controlled atmosphere storage device of claim 1, wherein the number of transverse air pipes is at least two.

6. The controlled atmosphere storage device of fruit according to claim 5, wherein 3-5 gas outlets are provided on each transverse gas pipe.

7. The controlled atmosphere storage device for fruits according to any one of claims 1 to 6, wherein a pressure switch valve is further connected between the air outlet pipe and the first air duct.

8. The controlled atmosphere storage device of claim 7, wherein the pressure switch valve comprises a valve body, and an inlet channel and an outlet channel are arranged in the valve body; the air inlet channel and the air outlet channel are respectively connected with an air outlet pipe and a first air duct; a switch cavity is formed between the air inlet channel and the air outlet channel, and a hemispherical plug is arranged in the switch cavity; the spherical cambered surface of the hemispherical plug faces the air inlet channel; at least two guide rods are arranged on the plane of the plug, and guide holes are correspondingly formed in the side wall of the switch cavity; and the guide rod is sleeved with a return spring.