CN113306771B - Plasma air-conditioning fresh-keeping machine and using method thereof - Google Patents
Plasma air-conditioning fresh-keeping machine and using method thereof Download PDFInfo
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- CN113306771B CN113306771B CN202110617551.2A CN202110617551A CN113306771B CN 113306771 B CN113306771 B CN 113306771B CN 202110617551 A CN202110617551 A CN 202110617551A CN 113306771 B CN113306771 B CN 113306771B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B31/00—Packaging articles or materials under special atmospheric or gaseous conditions; Adding propellants to aerosol containers
- B65B31/04—Evacuating, pressurising or gasifying filled containers or wrappers by means of nozzles through which air or other gas, e.g. an inert gas, is withdrawn or supplied
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B25/00—Packaging other articles presenting special problems
- B65B25/001—Packaging other articles presenting special problems of foodstuffs, combined with their conservation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
- B65B51/10—Applying or generating heat or pressure or combinations thereof
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Abstract
The invention discloses a plasma modified atmosphere fresh-keeping machine and a using method thereof, wherein the plasma modified atmosphere fresh-keeping machine comprises an airflow control system, a plasma generating mechanism and a modified atmosphere packaging machine, the airflow control system is used for coordinating the sequence, the acting time and the airflow of mixed gas to ensure the orderly process of intermittent packaging, the plasma generating mechanism is connected with the airflow control system and is used for generating plasma in the flowing mixed gas, and the modified atmosphere packaging machine is connected with the airflow control system and is used for packaging a target product in a packaging box with gas barrier property. The using method of the fresh-keeping machine comprises the following steps: the method adopts an alternating current discharge mode to generate low-temperature plasma at normal temperature, the plasma is filled into the food package along with the mixed gas, the food before modified atmosphere packaging is subjected to non-thermal sterilization, the modified atmosphere preservation effect is further improved, and the technical effects of prolonging the product preservation period, being simple in equipment operation, safe and reliable and the like are further achieved.
Description
Technical Field
The invention relates to the technical field of plasma treatment, in particular to a plasma air conditioning fresh-keeping machine and a using method thereof.
Background
With the rapid development of modern food processing technology, people have higher requirements on the requirements of food, such as quantity and quality. Many heat-sensitive foods cannot be treated by conventional methods such as heat sterilization during storage and processing, and non-heat sterilization techniques such as irradiation and autoclaving have problems in safety, practicability and industrialization. The situation seriously restricts the rapid development of the modern food industry. Therefore, various technologies for improving the shelf life and the sales radius of the food by a non-thermal sterilization and preservation method are rapidly developed. Among various sterilization and preservation treatment methods such as physical treatment, chemical treatment, mechanical treatment and the like, the plasma treatment technology is rapidly developed due to the advantages of high cleaning efficiency, low energy consumption, no waste and the like.
At present, the traditional plasma treatment mode is high-voltage direct current Dielectric Barrier Discharge (DBD), and the treatment method has the defects of high voltage, limited treatment distance, high operation safety risk, low efficacy and the like. The modern process adopts a plasma treatment technology of direct current jet discharge, separates a generation interval and an action interval of the plasma, and transmits the plasma to a sterilization area in an air jet mode to achieve the effect of sterilization and freshness preservation, thereby breaking the limitations of limited treatment intervals, overhigh treatment conditions, large safety risk and the like, reducing the voltage of the whole process, adjusting the intervals, improving the efficiency and obtaining more remarkable effect than the conventional DBD treatment process.
Chinese patent (CN 201510745890.3) discloses a modified atmosphere packaging machine. The modified atmosphere packaging machine comprises a rack, a packaging barrel and a recycling barrel are arranged on the rack, a packaging film is wound on the packaging barrel, a mold assembly is arranged above the rack and below the packaging barrel and is divided into an upper vacuum chamber and a lower vacuum chamber which are independent and closed, when the packaging box is inflated, only the lower vacuum chamber is inflated with fresh-keeping gas, and the upper vacuum chamber is inflated with air, so that a large amount of fresh-keeping gas is saved, and electric power, manpower and the like consumed by a gas station for making the fresh-keeping gas are saved. However, since the food may contact with microorganisms before modified atmosphere preservation and sealing, the microorganisms will be enclosed in the food package together with the food, and the microorganisms remaining on the surface of the food after modified atmosphere will cause the food to be rotten.
Therefore, it is an urgent technical problem to be solved by the technical personnel in the field at present how to provide a plasma modified atmosphere fresh-keeping machine and a using method thereof, on the basis of the existing modified atmosphere fresh-keeping packaging machine, and the surface of the food is sterilized by plasma before modified atmosphere packaging, so as to further improve the modified atmosphere fresh-keeping effect and effectively prolong the shelf life.
Disclosure of Invention
In view of the above, an object of the present application is to provide a plasma modified atmosphere fresh-keeping machine and a method for using the same, which adopt an ac discharge mode to avoid a high voltage of dc discharge, generate a low-temperature plasma at a normal temperature, and the plasma is charged into a food package along with a mixed gas, so as to perform non-thermal sterilization on the food before modified atmosphere packaging, thereby further improving the modified atmosphere fresh-keeping effect, and further achieving technical effects of prolonging the product fresh-keeping period, simple device operation, safety, reliability, and the like.
In order to achieve the above object, the present application provides the following technical solutions.
A plasma air-conditioning fresh-keeping machine comprises an air flow control system, a plasma generation mechanism and an air-conditioning packaging machine, wherein the air flow control system comprises a first case and a second case, the first case is positioned below the second case and used for coordinating the sequence, action time and air flow of mixed gas to ensure the orderly proceeding of intermittent packaging, the plasma generation mechanism is connected with the air flow control system and used for producing plasma in the flowing mixed gas, and the air-conditioning packaging machine is connected with the air flow control system and used for packaging a target product in a packaging box with gas barrier property;
the air flow control system comprises a first case and a second case, wherein an air inlet pipeline, a first mixing bottle, a second mixing bottle, an air outlet pipeline and an air control module are arranged in the first case, the air inlet pipeline is arranged on the side of the first case, the first mixing bottle and the second mixing bottle are arranged in the first case, the air outlet pipeline is arranged above the first case, the first mixing bottle is connected to the rear of the air inlet pipeline, the second mixing bottle is connected to the rear of the first mixing bottle, the air outlet pipeline is connected to the rear of the second mixing bottle, the air control module is arranged in the first case, one end of the air control module is connected with an air compressor, and the other end of the air control module is connected with the air conditioning packaging machine and a target product respectively;
the plasma generating mechanism comprises a positive electrode, a negative electrode, a glass sleeve and a fixing frame, wherein the glass sleeve is arranged at the center of the plasma generating mechanism, mixed gas passes through the inside of the glass sleeve, the positive electrode is connected with the inner side of the glass sleeve, the negative electrode is connected with the outer side of the glass sleeve, two sides of the glass sleeve are respectively connected with the fixing frame, and the other side of the fixing frame is connected with an air outlet pipeline of the airflow control system;
the modified atmosphere packaging machine comprises a material placing disc, a heat sealing plate, a first air cylinder, a second air cylinder and a third air cylinder, wherein the material placing disc is arranged above the first case, the first air cylinder and the second air cylinder are arranged between the material placing disc and the first case, the third air cylinder is arranged behind the material placing disc, the first air cylinder is connected with the material placing disc and used for controlling the material placing disc to move up and down, the second air cylinder is connected with the first air cylinder and used for controlling the material placing disc to move back and forth, the third air cylinder is connected with the second air cylinder, the heat sealing plate is arranged in front of the third air cylinder and connected with the third air cylinder, and the third air cylinder is used for controlling the heat sealing plate to move up and down;
preferably, first quick-witted case and second machine case pass through the spliced pole and connect, first machine case is used for arranging the gas circuit and bears the weight of the mixing bottle, the second machine case is used for controlling the gas circuit break-make, inlet line quantity is a plurality of, is connected with the feeding cylinder that is equipped with different raw material gas respectively, raw material gas carries out preliminary mixing in entering into first mixing bottle earlier through the inlet line, further mixes in entering into the second mixing bottle again, and the gas of misce bene fills inside the packing carton that has gas barrier performance through the gas outlet pipe way that is connected with plasma generation mechanism.
Preferably, first machine case and second machine case pass through the spliced pole to be connected, first machine case is used for arranging the gas circuit and bears the weight of the mixing bottle, the second machine case is used for controlling the gas circuit break-make, air inlet pipe way quantity is a plurality of, is connected with the feed cylinder that is equipped with different raw material gas respectively, raw material gas is earlier through being connected with the pipeline that plasma takes place the mechanism, and the reentrant mixing bottle mixes and fills inside the packing carton that has gas barrier property.
Preferably, the gas accuse module is connected with the air compressor machine, and the gas accuse module includes pressure gauge, tee bend stand-off, vacuum generator, solenoid valve, the pressure gauge sets up in the side of first quick-witted case for detect the air pressure that the air compressor machine pours into the gas accuse module into, the air process through pressure detection the tee bend stand-off falls into two circuits, and one of them circuit is connected with vacuum generator, and vacuum generator's the other end and packing carton are connected, vacuum generator is used for producing the negative pressure, takes out the air in the packing carton, and another circuit subdivides into three circuits, is connected with three solenoid valve respectively, the solenoid valve is connected with second machine case, controls the action of first cylinder, second cylinder, third cylinder.
Preferably, the second mixing bottle is provided with a manual valve, and aiming at bag-shaped packaging materials which are not suitable for the modified atmosphere packaging machine, the mixed gas is directly filled into the packaging bag with gas barrier property through a gas outlet pipeline connected with the manual valve.
Preferably, the positive electrode, the glass sleeve and the fixing frame are mechanically connected through an inner hexagonal cylinder bolt arranged on one side of the plasma generating mechanism, and the negative electrode is connected with the glass sleeve in a bonding mode.
Aiming at the technical scheme of the plasma air-conditioning fresh-keeping machine, the using method comprises the following steps:
a. the switches of the feeding cylinders corresponding to the raw material gases are respectively opened, the second case is communicated with the air inlet pipeline through the electromagnetic valve, the pressure regulating valve regulates the pressure of the raw material gases injected into the feeding cylinders within a certain range, and the raw material gases are injected into the first mixing bottle according to a certain proportion;
b. after being preliminarily mixed in a first mixing bottle, all raw material gases are transmitted to a second mixing bottle, and the raw material gases are fully mixed in the second mixing bottle;
c. the mixed gas flows through the plasma generating mechanism through the gas outlet pipeline, the positive electrode and the negative electrode discharge under the atmospheric pressure, and plasma is generated in the mixed gas;
d. the switch of the air compressor is turned on, the second case is communicated with the air control module through the solenoid valve, the vacuum generator is used for generating negative pressure to extract air in the packaging box, and the air outlet pipeline fills mixed gas with plasma into the packaging box to realize plasma treatment on a target product;
e. the second case is communicated with an air passage connected with a second cylinder through the control of an electromagnetic valve, and the second cylinder controls the material placing disc to move backwards and stop right below the heat sealing plate;
f. the second case is communicated with the gas circuit connected with the first cylinder and the third cylinder through the control of the electromagnetic valve, and the first cylinder and the third cylinder control the material placing disc and the heat sealing plate to move oppositely to complete the packaging action;
g. after the target product is packaged, the second case controls the air inlet pipeline to be disconnected through the electromagnetic valve, raw material gas is injected in a pause mode, and the first cylinder, the second cylinder and the third cylinder drive the material placing disc and the heat sealing plate to return to the original position.
The application has the advantages and effects as follows:
(1) In the plasma modified atmosphere freshness retaining machine disclosed by the invention, two mixing bottles are arranged in the airflow control system, and the raw material gas is more uniformly mixed twice, so that the treatment effect of the modified atmosphere freshness retaining machine is greatly improved, and the freshness retaining period of a target product is prolonged.
(2) In the plasma modified atmosphere freshness-retaining machine disclosed by the invention, the mixed gas in the second mixing bottle can be used for treating box-shaped packaging materials through the gas outlet pipeline connected with the plasma generating mechanism and can also be used for treating bag-shaped packaging materials through the gas outlet pipeline connected with the manual valve, so that the applicability of the modified atmosphere freshness-retaining machine is greatly improved.
(3) In the plasma modified atmosphere preservation machine disclosed by the invention, the inlet of the air inlet pipeline and the upper part of the second mixing bottle are respectively provided with the pressure switch, and when the pressure exceeds a preset range, the pressure switches are closed and give an alarm, so that the safety of the modified atmosphere preservation machine is greatly improved.
(4) In the plasma modified atmosphere fresh-keeping machine disclosed by the invention, the electromagnetic valve is connected with the second case, and the on-off of the air passage is controlled by the second case, so that the ordered operation of intermittent packaging is ensured, and the operation steps of the modified atmosphere fresh-keeping machine are greatly simplified.
The foregoing description is only an overview of the technical solutions of the present application, so that the technical means of the present application can be more clearly understood and the present application can be implemented according to the content of the description, and in order to make the above and other objects, features and advantages of the present application more clearly understood, the following detailed description is made with reference to the preferred embodiments of the present application and the accompanying drawings.
The above and other objects, advantages and features of the present application will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
Fig. 1 is a perspective view of a plasma air-conditioning fresh-keeping machine provided in an embodiment of the present application;
FIG. 2 is a front view of a plasma air-conditioning fresh-keeping machine according to an embodiment of the present disclosure;
fig. 3 is a perspective view of an air path of the plasma air-conditioning fresh-keeping machine provided in the embodiment of the present application;
fig. 4 is a left side view of an air path of the plasma air-conditioning fresh-keeping machine provided in the embodiment of the present application;
FIG. 5 is a cross-sectional view of a plasma generating mechanism of the plasma air-conditioning fresh-keeping machine according to the embodiment of the present application;
FIG. 6 is a left side view of the modified atmosphere packaging machine of the plasma modified atmosphere preservation machine according to the embodiment of the present application;
wherein, 1, an airflow control system; 101. a first chassis; 102. a second chassis; 103. an air intake line; 104. a first mixing bottle; 105. a second mixing bottle; 106. an air outlet pipeline; 107. an air control module; 2. a plasma generating mechanism; 201. a positive electrode; 202. a negative electrode; 203. a glass sleeve; 204. a fixed mount; 3. an air conditioning packaging machine; 301. placing a tray; 302. heat-sealing the board; 303. a first cylinder; 304. a second cylinder; 305. and a third cylinder.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. In the following description, specific details such as specific configurations and components are provided only to help the embodiments of the present application be fully understood. Accordingly, it will be apparent to those skilled in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the present application. In addition, descriptions of well-known functions and constructions are omitted in the embodiments for the sake of clarity and conciseness.
It should be appreciated that reference throughout this specification to "one embodiment" or "the embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the appearances of the phrase "one embodiment" or "the present embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, B exists alone, and A and B exist at the same time, and the term "/and" is used herein to describe another association object relationship, which means that two relationships may exist, for example, A/and B, may mean: a alone, and both a and B alone, and further, the character "/" in this document generally means that the former and latter associated objects are in an "or" relationship.
Further, the present application may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed.
It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion.
Example 1
This embodiment mainly describes the basic components and connection relationship of the plasma modified atmosphere fresh-keeping machine of the present invention.
As shown in fig. 1, it shows a perspective view of a plasma air-conditioning fresh-keeping machine; as shown in fig. 2, it shows a front view of a plasma air-conditioning fresh-keeping machine; as shown in fig. 3, it shows a perspective view of the air path of the plasma air-conditioning fresh-keeping machine; as shown in fig. 4, it shows a left view of the air path of the plasma air-conditioning fresh-keeping machine; combine fig. 1, 2, 3, 4 to show, the plasma air conditioning machine that this application embodiment provided, equipment includes airflow control system 1, plasma generation mechanism 2 and air conditioning packagine machine 3, airflow control system 1 includes first quick-witted case 101 and second machine case 102, first quick-witted case 101 is located the below of second machine case 102 for cooperating gaseous mixture's precedence order, action time, gas flow, guarantee going on in order of intermittent type formula packing, plasma generation mechanism 2 is connected with airflow control system 1 for make plasma in the gaseous mixture that flows through, air conditioning packagine machine 3 is connected with airflow control system 1 for encapsulate inside the packing carton that has gas barrier property with the target product.
Preferably, the airflow control system 1 includes a first chassis 101 and a second chassis 102, an air inlet pipeline 103, a first mixing bottle 104, a second mixing bottle 105, an air outlet pipeline 106, and an air control module 107 are arranged inside the first chassis 101, the air inlet pipeline 103 is arranged on the side of the first chassis 101, the first mixing bottle 104 and the second mixing bottle 105 are arranged inside the first chassis 101, the air outlet pipeline 106 is arranged above the first chassis 101, the first mixing bottle 104 is connected behind the air inlet pipeline 103, the second mixing bottle 105 is connected behind the first mixing bottle 104, the air outlet pipeline 106 is connected behind the second mixing bottle 105, the air control module 107 is arranged inside the first chassis 101, one end of the air control module is connected with an air compressor, and the other end of the air control module is respectively connected with the controlled atmosphere packaging machine 3 and a target product;
further, the first chassis 101 and the second chassis 102 are connected by connecting posts arranged at four corners of the chassis, the first chassis 101 is used for arranging gas paths and carrying mixing bottles, the second chassis 102 is used for controlling the on-off of the gas paths, the number of the gas inlet pipelines 103 is three, the three gas inlet pipelines are respectively connected with a feeding cylinder filled with three raw material gases of O2, CO2 and N2, the raw material gases firstly enter the first mixing bottle 104 through the gas inlet pipeline 103 to be primarily mixed, then enter the second mixing bottle 105 to be further mixed, and the uniformly mixed gases are filled into the packaging box with gas barrier property through the gas outlet pipeline 106 connected with the plasma generating mechanism 2;
further, the pneumatic control module 107 is connected with the air compressor, the pneumatic control module 107 comprises a pressure gauge, a three-way outlet pipe, a vacuum generator and an electromagnetic valve, the pressure gauge is arranged on the side surface of the first case 101 and used for detecting the air pressure injected into the pneumatic control module 107 by the air compressor, the air detected through the pressure is divided into two lines through the three-way outlet pipe, one line is connected with the vacuum generator, the other end of the vacuum generator is connected with the packaging box, the vacuum generator is used for generating negative pressure and extracting the air in the packaging box, the other line is divided into three lines which are respectively connected with the three electromagnetic valves, and the electromagnetic valves are connected with the second case 102 and used for controlling the actions of the first air cylinder 303, the second air cylinder 304 and the third air cylinder 305;
preferably, the second mixing bottle 105 is provided with a manual valve, and the mixed gas is directly filled into the packaging bag with gas barrier property through a gas outlet pipeline 106 connected with the manual valve for the bag-shaped packaging material which is not suitable for the modified atmosphere packaging machine 3.
As shown in fig. 5, it shows a cross-sectional view of the plasma generating mechanism 2 of the plasma air-conditioning fresh-keeping machine; preferably, the plasma generation mechanism 2 includes a positive electrode 201, a negative electrode 202, a glass sleeve 203, and a fixing frame 204, the glass sleeve 203 is disposed at the center of the plasma generation mechanism 2, the mixed gas passes through the inside of the glass sleeve 203, the positive electrode 201 is connected with the inside of the glass sleeve 203, the negative electrode 202 is connected with the outside of the glass sleeve 203, two sides of the glass sleeve 203 are respectively connected with the fixing frame 204, and the other side of the fixing frame 204 is connected with the gas outlet pipeline 106 of the gas flow control system 1;
as shown in fig. 6, which shows a left side view of the modified atmosphere packaging machine 3 of the plasma modified atmosphere machine; preferably, the modified atmosphere packaging machine 3 comprises a material placing tray 301, a heat sealing plate 302, a first air cylinder 303, a second air cylinder 304 and a third air cylinder 305, wherein the material placing tray 301 is arranged above the first case 101, the first air cylinder 303 and the second air cylinder 304 are arranged between the material placing tray 301 and the first case 101, the third air cylinder 305 is arranged behind the material placing tray 301, the first air cylinder 303 is connected with the material placing tray 301 for controlling the material placing tray 301 to move up and down, the second air cylinder 304 is connected with the first air cylinder 303 for controlling the material placing tray 301 to move back and forth, the third air cylinder 305 is connected with the second air cylinder 304, the heat sealing plate 302 is arranged in front of the third air cylinder 305 and is connected with the third air cylinder 305, and the third air cylinder 305 is used for controlling the heat sealing plate 302 to move up and down;
further, the positive electrode 201, the glass sleeve 203 and the fixing frame 204 are mechanically connected through a hexagon socket head bolt arranged on one side of the plasma generating mechanism 2, the negative electrode 202 is connected with the glass sleeve 203 in a bonding mode, the material placing tray 301 is of a cuboid structure with a plurality of grooves, the heat sealing plate 302 is of a cuboid structure with a shape matched with that of the material placing tray 301, and the first cylinder 303 and the third cylinder 305 control the material placing tray 301 and the heat sealing plate 302 to move oppositely to complete the packaging action.
Preferably, a first pressure switch and a pressure regulating valve are arranged at the inlet of the gas inlet pipeline 103, the first pressure switch detects the pressure range of the raw material gas injected by the feed cylinder, when the pressure exceeds the adjustable range of the pressure regulating valve, the first pressure switch is closed and gives an alarm, the pressure regulating valve regulates the pressure of the raw material gas injected by the feed cylinder within a certain range, a second pressure switch is arranged on the second mixing bottle 105, the second pressure switch detects the pressure range inside the second mixing bottle 105, and when the pressure exceeds the preset range, the second pressure switch is closed and gives an alarm.
Preferably, electromagnetic valves are arranged at the inlets of the air inlet pipeline 103 and the air control module 107, the electromagnetic valves are connected with the second case 102, and the on-off of the air path is controlled through the second case 102, so that the orderly operation of intermittent packaging is ensured.
It should be noted that, sealing devices (e.g., O-rings) are disposed at the joints of the glass sleeve 203 and the two end fixing frames 204, and the sealing devices are the prior art in the field, which is not described in detail herein; the pressure switch, the pressure regulating valve, the electromagnetic valve and the vacuum generator are all common knowledge in the field, and the invention is not repeated.
Example 2
On the basis of embodiment 1, this embodiment further provides a method for using a plasma air-conditioning fresh-keeping machine, which has the same technical features and technical description as those in embodiment 1, and is not repeated in this embodiment.
With reference to fig. 1 to 6, the use method of the plasma air-conditioning fresh-keeping machine specifically comprises the following steps:
step 1: the switches of feeding cylinders of three raw material gases of O2, CO2 and N2 are respectively opened, the second case 102 is communicated with the air inlet pipeline 103 through an electromagnetic valve control, the pressure regulating valve regulates the pressure of the raw material gas injected into the feeding cylinder within a certain range, and the raw material gases are injected into the first mixing bottle 104 according to a certain proportion;
step 2: after being preliminarily mixed in the first mixing bottle 104, the raw material gases are transmitted to the second mixing bottle 105, and the raw material gases are fully mixed in the second mixing bottle 105;
and step 3: the mixed gas flows through the plasma generating mechanism 2 through the gas outlet pipeline 106, and the positive electrode 201 and the negative electrode 202 perform direct current jet discharge under atmospheric pressure to generate plasma in the mixed gas;
and 4, step 4: the switch of the air compressor is turned on, the second case 102 is communicated with the air control module 107 through the electromagnetic valve control pipeline, the vacuum generator is used for generating negative pressure to extract air in the packaging box, and the air outlet pipeline 106 fills mixed gas with plasma into the packaging box to complete plasma treatment on a target product;
and 5: the second chassis 102 controls the air passage communication connected with a second air cylinder 304 through an electromagnetic valve, and the second air cylinder 304 controls the material placing tray 301 to move backwards and stop right below the heat sealing plate 302;
step 6: the second case 102 is controlled by an electromagnetic valve to be communicated with air passages connected with the first cylinder 303 and the third cylinder 305, and the first cylinder 303 and the third cylinder 305 control the material placing disc 301 and the heat sealing plate 302 to move oppositely to finish the packaging action;
and 7: after the target product is packaged, the second chassis 102 controls the air inlet pipeline 103 to be disconnected through the electromagnetic valve, the raw material gas is injected in a pause mode, and the first cylinder 303, the second cylinder 304 and the third cylinder 305 drive the material placing tray 301 and the heat sealing plate 302 to return to the original position. Therefore, the method is realized by adopting an alternating current discharge mode, generating low-temperature plasma under the normal temperature condition, filling the plasma into the food package along with the mixed gas, and performing non-thermal sterilization on the food before modified atmosphere packaging.
The previous description of all disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. The plasma air-conditioning fresh-keeping machine is characterized by comprising an air flow control system (1), a plasma generating mechanism (2) and an air-conditioning packaging machine (3), wherein the air flow control system (1) comprises a first case (101) and a second case (102), the first case (101) is positioned below the second case (102) and used for cooperating with the sequence, action time and air flow of mixed gas to ensure the ordered operation of intermittent packaging, the plasma generating mechanism (2) is connected with the air flow control system (1) and used for generating plasma in the flowing mixed gas, and the air-conditioning packaging machine (3) is connected with the air flow control system (1) and used for packaging a target product in a packaging box with gas barrier property;
the air-conditioning packaging machine is characterized in that an air inlet pipeline (103), a first mixing bottle (104), a second mixing bottle (105), an air outlet pipeline (106) and an air control module (107) are arranged inside the first machine box (101), the air inlet pipeline (103) is arranged on the side of the first machine box (101), the first mixing bottle (104) and the second mixing bottle (105) are arranged inside the first machine box (101), the air outlet pipeline (106) is arranged above the first machine box (101), the first mixing bottle (104) is connected behind the air inlet pipeline (103), the second mixing bottle (105) is connected behind the first mixing bottle (104), the air outlet pipeline (106) is connected behind the second mixing bottle (105), the air control module (107) is arranged inside the first machine box (101), one end of the air control module is connected with an air compressor, and the other end of the air control module is respectively connected with the air conditioning packaging machine (3) and a target product;
the modified atmosphere packaging machine (3) comprises a material placing disc (301), a heat sealing plate (302), a first air cylinder (303), a second air cylinder (304) and a third air cylinder (305), wherein the material placing disc (301) is arranged above a first case (101), the first air cylinder (303) and the second air cylinder (304) are arranged between the material placing disc (301) and the first case (101), the third air cylinder (305) is arranged behind the material placing disc (301), the first air cylinder (303) is connected with the material placing disc (301) and used for controlling the material placing disc (301) to move up and down, the second air cylinder (304) is connected with the first air cylinder (303) and used for controlling the material placing disc (301) to move back and forth, the third air cylinder (305) is connected with the second air cylinder (304), the heat sealing plate (302) is arranged in front of the third air cylinder (305) and connected with the third air cylinder (305), and the third air cylinder (305) is used for controlling the heat sealing plate (302) to move up and down;
a first pressure switch and a pressure regulating valve are arranged at the inlet of the air inlet pipeline (103), the first pressure switch detects the pressure range of raw material gas injected into the feeding cylinder, when the pressure exceeds the adjustable range of the pressure regulating valve, the first pressure switch is closed and gives an alarm, the pressure regulating valve regulates the pressure of the raw material gas injected into the feeding cylinder within a certain range, a second pressure switch is arranged on the second mixing bottle (105), the second pressure switch detects the pressure range inside the second mixing bottle (105), and when the pressure exceeds the preset range, the second pressure switch is closed and gives an alarm;
gas accuse module (107) is connected with the air compressor machine, and gas accuse module (107) includes pressure gauge, tee bend stand-off, vacuum generator, solenoid valve, the pressure gauge sets up in the side of first quick-witted case (101), is used for detecting the air pressure that the air compressor machine pours into gas accuse module (107), and the air process through pressure detection the tee bend stand-off falls into two circuits, and one of them circuit is connected with vacuum generator, and vacuum generator's the other end is connected with the packing carton, vacuum generator is used for producing the negative pressure, takes out the air in the packing carton, and another circuit subdivides into three circuits, is connected with three solenoid valve respectively, the solenoid valve is connected with second quick-witted case (102), controls the action of first cylinder (303), second cylinder (304), third cylinder (305).
2. The plasma air-conditioning fresh-keeping machine as claimed in claim 1, characterized in that the first machine box (101) and the second machine box (102) are connected through a connecting column, the first machine box (101) is used for arranging air paths and carrying mixing bottles, the second machine box (102) is used for controlling the on-off of the air paths, the number of the air inlet pipelines (103) is several, the air inlet pipelines are respectively connected with feeding cylinders filled with different raw material gases, the raw material gases enter the mixing bottles through the air inlet pipelines (103) to be mixed, and the uniformly mixed gases are filled into the packaging box with the gas barrier property through an air outlet pipeline (106) connected with the plasma generating mechanism (2).
3. The plasma air-conditioning fresh-keeping machine as claimed in claim 1, characterized in that the first machine box (101) and the second machine box (102) are connected through a connecting column, the first machine box (101) is used for arranging air channels and carrying mixing bottles, the second machine box (102) is used for controlling the on-off of the air channels, the number of the air inlet pipelines (103) is several, the air inlet pipelines are respectively connected with feeding cylinders filled with different raw material gases, the raw material gases firstly pass through the pipeline connected with the plasma generating mechanism (2) and then enter the mixing bottles to be mixed and filled into the packaging boxes with gas barrier property.
4. The plasma modified atmosphere machine as claimed in claim 2, wherein the second mixing bottle (105) is provided with a manual valve, and for the bag-shaped packaging materials which are not suitable for the modified atmosphere packaging machine (3), the mixed gas is directly filled into the packaging bag with gas barrier property through a gas outlet pipeline (106) connected with the manual valve.
5. The plasma air-conditioning fresh-keeping machine as claimed in claim 4, characterized in that the plasma generating mechanism (2) comprises a positive electrode (201), a negative electrode (202), a glass sleeve (203) and a fixing frame (204), the glass sleeve (203) is arranged at the center of the plasma generating mechanism (2), the mixed gas passes through the inside of the glass sleeve (203), the positive electrode (201) is connected with the inner side of the glass sleeve (203), and the negative electrode (202) is connected with the outer side of the glass sleeve (203).
6. The plasma air-conditioning fresh-keeping machine as claimed in claim 5, characterized in that the positive electrode (201), the glass sleeve (203) and the fixing frame (204) are mechanically connected through a hexagon socket head bolt arranged on one side of the plasma generating mechanism (2), and the negative electrode (202) is connected with the glass sleeve (203) in a bonding manner.
7. The use method of the plasma modified atmosphere freshness protection machine, which is characterized by comprising the following steps:
a. the switches of the feeding cylinders corresponding to the raw material gases are respectively opened, the second case (102) is communicated with the air inlet pipeline (103) through an electromagnetic valve, the pressure regulating valve regulates the pressure of the raw material gases injected into the feeding cylinders within a certain range, and the raw material gases are injected into the first mixing bottle (104) according to a certain proportion;
b. after being preliminarily mixed in a first mixing bottle (104), the raw material gases are transmitted to a second mixing bottle (105), and the raw material gases are fully mixed in the second mixing bottle (105);
c. the mixed gas flows through the plasma generating mechanism (2) through the gas outlet pipeline (106), the positive electrode (201) and the negative electrode (202) discharge under the atmospheric pressure, and plasma is generated in the mixed gas;
d. the switch of the air compressor is turned on, the second case (102) is communicated with a pipeline of the air control module (107) through the electromagnetic valve, the vacuum generator is used for generating negative pressure to extract air in the packaging box, and the mixed gas with plasma is filled into the packaging box through the air outlet pipeline (106) to realize plasma treatment on a target product;
e. the second case (102) is controlled by an electromagnetic valve to be communicated with an air passage connected with a second air cylinder (304), and the second air cylinder (304) controls the material placing tray (301) to move backwards and stop right below the heat sealing plate (302);
f. the second case (102) is controlled by an electromagnetic valve to be communicated with an air path connected with the first air cylinder (303) and the third air cylinder (305), and the first air cylinder (303) and the third air cylinder (305) control the material discharging disc (301) and the heat sealing plate (302) to move oppositely to complete the packaging action;
g. after the target product is packaged, the second case (102) controls the air inlet pipeline (103) to be disconnected through the electromagnetic valve, the raw material gases are injected in a pause mode, the first cylinder (303), the second cylinder (304) and the third cylinder (305) drive the material placing disc (301) and the heat sealing plate (302) to return to the original positions, and therefore the modified atmosphere preservation method of performing non-heat sterilization on the food before modified atmosphere packaging by adopting low-temperature plasma is achieved.
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| CN115428827A (en) * | 2022-08-31 | 2022-12-06 | 西安交通大学 | Gas-filled packaging device and method based on plasma activated gas |
| CN115500379A (en) * | 2022-08-31 | 2022-12-23 | 西安交通大学 | Egg surface sterile treatment device and method based on plasma activated gas |
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