CN115817933A

CN115817933A - Pretreatment device, pretreatment method thereof and packaging equipment

Info

Publication number: CN115817933A
Application number: CN202211493559.3A
Authority: CN
Inventors: 胡瑜; 李雪; 周彩明; 蔡丽温; 连彩霞
Original assignee: Kangmeibao Suzhou Co ltd
Current assignee: Kangmeibao Suzhou Co ltd
Priority date: 2022-11-25
Filing date: 2022-11-25
Publication date: 2023-03-21

Abstract

The disclosure provides a pretreatment device of packaging equipment, a pretreatment method thereof and the packaging equipment. The packaging apparatus is configured to fill contents in a package, the pre-treatment device is configured to: pre-treating the package before the contents are filled, the pre-treating device comprising: an injection assembly configured to inject an injectate into the package and comprising a plurality of injectors, the package configured to move relative to the plurality of injectors; wherein the plurality of sprayers are arranged not to be in the same line along the moving direction of the package. When the package moves to a plurality of ejectors in sequence along the moving direction, the same part in the package can be prevented from being ejected for multiple times, so that the ejection uniformity is improved, and the pretreatment effect is improved.

Description

Pretreatment device, pretreatment method thereof and packaging equipment

Technical Field

The disclosure relates to the field of packaging equipment, in particular to a pretreatment device of packaging equipment, a pretreatment method of the pretreatment device and the packaging equipment.

Background

In the field of food processing, packages such as packets may be used to contain flowable food products (also referred to as contents), such as yogurt, milk, and the like. The package is formed, for example, from a composite sheet for packaging comprising a laminate of a paperboard layer, an inner plastic layer, an outer plastic layer, and the like, wherein the outer and inner plastic layers are formed, for example, from thermoplastic Polyethylene (PE).

The packaging equipment can fill and seal the food product into the package. The package has, for example, an opening which is open on the upper side in order to provide a filling opening for filling. The packaging device comprises a filling area into which the packaging device fills the food product when the package, which is open on the upper side, is transported. The filling process is usually carried out under aseptic conditions, and therefore the packages need to be pre-treated before filling in order to sterilise and sterilize the packages.

Disclosure of Invention

The embodiment of the disclosure provides a pretreatment device of a packaging device, a pretreatment method thereof and the packaging device, when a package moves to a plurality of ejectors in sequence along a moving direction, the same part in the package can be prevented from being ejected for multiple times, so that the ejection uniformity is improved, and the pretreatment effect is improved.

According to a first aspect of the present disclosure, there is provided a pre-treatment device of a packaging apparatus configured to fill a content in a package, the pre-treatment device configured to: pre-treating the package before the contents are filled, the pre-treating device comprising: an injection assembly configured to inject an injectate into the package and comprising a plurality of injectors, the package configured to move relative to the plurality of injectors; wherein the plurality of sprayers are arranged not to be in the same line along the moving direction of the package.

In at least some embodiments, the plurality of injectors includes at least two injectors including a first injector and a second injector; the spray assembly further comprises at least two spray zones, the at least two spray zones comprising a first spray zone disposed in correspondence with the first sprayer and a second spray zone disposed in correspondence with the second sprayer, the package configured to move from the first spray zone to the second spray zone along the movement direction; wherein a straight line passing through a first center of the first spray zone and a second center of the second spray zone is defined as a spray zone center connecting line, and the spray zone center connecting line is parallel to the moving direction of the package; the first ejector and the second ejector are respectively positioned on two opposite sides of a central connecting line of the injection area.

In at least some embodiments, the first injector has a first injection center and the second injector has a second injection center, the first injection center and the second injection center being located on opposite sides of a line connecting centers of the injection zones.

In at least some embodiments, at least one of the first injection zone and the second injection zone intersects the injection zone centerline; or the first injection area and the second injection area are not intersected with the central connecting line of the injection areas.

In at least some embodiments, the first center of spray has a first perpendicular distance to the spray zone centerline; the second injection center has a second vertical distance to the injection zone center line; wherein the first vertical distance is equal to the second vertical distance.

In at least some embodiments, the first injector has a first injection center and the second injector has a second injection center; the first spraying area is provided with a first spraying area central line which is vertical to the central connecting line of the spraying areas; the second spraying area is provided with a second spraying area central line which is vertical to the central connecting line of the spraying areas; wherein the first injection center is not coincident with the first injection zone centerline and the second injection center is not coincident with the second injection zone centerline.

In at least some embodiments, the first injector is located on a side of the centerline of the first injection zone remote from the second injection zone, and the second injector is located on a side of the centerline of the second injection zone remote from the first injection zone; or the first injector is positioned on one side of the central line of the first injection zone close to the second injection zone, and the second injector is positioned on one side of the central line of the second injection zone close to the first injection zone.

In at least some embodiments, the first injection center has a third perpendicular distance to the first injection zone centerline; the second jet center has a fourth perpendicular distance to the second jet zone centerline; wherein the fourth vertical distance is not equal to the third vertical distance.

In at least some embodiments, the first injector has a first injection center and the second injector has a second injection center; the first spraying area is provided with a first spraying area central line which is vertical to the central connecting line of the spraying areas; the second spraying area is provided with a second spraying area central line which is vertical to the central connecting line of the spraying areas; wherein the first injection center coincides with the first injection zone centerline and/or the second injection center coincides with the second injection zone centerline.

In at least some embodiments, an orthographic projection of the first injector in a plane of the first injection zone falls within the first injection zone; the orthographic projection of the second ejector in the plane of the second ejection area falls into the second ejection area.

In at least some embodiments, the pretreatment device includes a plurality of spray assemblies arranged in sequence along a direction of movement of the packages to spray different sprays into the packages.

In at least some embodiments, the plurality of jetting assemblies comprises: a first spray assembly configured to spray a first spray onto the package; a second spray assembly configured to spray a second spray onto the package; wherein the first spray assembly is located upstream of the second spray assembly in the direction of movement of the packages, the first spray comprising a pre-heating substance and the second spray comprising a sterilizing substance.

In at least some embodiments, the plurality of jetting assemblies further comprises: a third spray assembly configured to spray a third spray onto the package; wherein the third jetting assembly is located downstream of the second jetting assembly in a direction of movement of the packages, the third jet comprising a dry substance.

In at least some embodiments, the pre-processing apparatus further comprises: a vacancy assembly disposed between the second and third spray assemblies, wherein the vacancy assembly includes a vacancy jet configured to not spray a spray into the package.

In at least some embodiments, the first injection assembly includes a first plurality of injectors, the second injection assembly includes a second plurality of injectors, the third injection assembly includes a third plurality of injectors, and the first, second, and third plurality of injectors are arranged not to be collinear.

In at least some embodiments, the plurality of injectors of the first injection assembly are arranged differently than the plurality of injectors of the second injection assembly.

In at least some embodiments, the package comprises a bottom surface having a first area; the orthographic projection of the ejector in the plane of the bottom surface is provided with a second area; wherein the first area is 12 to 35 times the second area.

In at least some embodiments, the ejector comprises a nozzle having a diameter of 12 to 15mm.

According to a second aspect of the present disclosure, there is provided a packaging apparatus comprising the aforementioned pretreatment device.

In at least some embodiments, the packaging apparatus further comprises: a conveying device including a plurality of containing units for containing the packages, the conveying device being configured to convey the packages sequentially in a conveying direction thereof to the plurality of ejectors.

According to a third aspect of the present disclosure, there is provided a preprocessing method of a preprocessing apparatus, including: moving the package so that the package passes the plurality of sprayers in sequence; spraying a spray into the package; wherein the plurality of sprayers are arranged not to be in the same line along the moving direction of the package.

In at least some embodiments, the pretreatment device includes a plurality of spray assemblies; the pretreatment method comprises the following steps: moving the package such that the package passes sequentially through the plurality of jetting assemblies configured to jet different jets into the package.

Drawings

To more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments will be briefly introduced below, and it is apparent that the drawings in the following description relate only to some embodiments of the present disclosure and are not limiting to the present disclosure.

Fig. 1 is a schematic structural diagram of a packaging apparatus according to an embodiment of the present disclosure.

FIG. 2 is a top view of two nozzles of a first jetting assembly of an embodiment of the present disclosure.

Fig. 3 is a side view of a first nozzle and a second nozzle of an embodiment of the present disclosure.

Fig. 4 is a side view of a first nozzle and a second nozzle of another embodiment of the present disclosure.

FIG. 5 is a top view of two nozzles of a first jetting assembly according to another embodiment of the present disclosure.

FIG. 6 is a top view of two nozzles of a first jetting assembly according to yet another embodiment of the present disclosure.

FIG. 7 is a top view of two nozzles of a first jetting assembly of yet another embodiment of the present disclosure.

Fig. 8 is a top view of two nozzles in the first jetting assemblies of comparative example 1, and example 2 of the present disclosure.

Fig. 9 is a top view of two nozzles in the first jetting assemblies of examples 3 and 4 of the present disclosure.

Fig. 10 shows Delta T temperature differential test results within the package at position 1 (corresponding to the first injection zone) and position 2 (corresponding to the second injection zone) for examples 3 and 4 of the present disclosure.

Fig. 11 shows a plot of Delta T temperature difference versus gas pressure within a package in examples 3 and 4 of the present disclosure.

Fig. 12 shows a graph of Delta T temperature difference versus hot air temperature within the package in examples 3 and 4 of the present disclosure.

Fig. 13 is a top view of two nozzles of a second jetting assembly in accordance with an embodiment of the present disclosure.

Fig. 14 is a top view of two nozzles in the second jetting assemblies of comparative example 2, comparative example 3, example 5, and example 6 of the present disclosure.

Fig. 15 is a top view of two nozzles in a second jetting assembly of example 7 of the present disclosure.

Fig. 16 shows Delta T temperature differential test results in packages of comparative example 2, comparative example 3, example 5, example 6, and example 7 of the present disclosure at location 2 (corresponding to the first injection zone).

Fig. 17 is a top view of two nozzles of a third jetting assembly of an embodiment of the present disclosure.

FIG. 18 is a top view of a plurality of nozzles of the first, second, and third jetting assemblies of an embodiment of the present disclosure.

Fig. 19 is a schematic structural view of a packaging apparatus according to another embodiment of the present disclosure.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the technical solutions of the embodiments of the present disclosure will be described clearly and completely with reference to the drawings of the embodiments of the present disclosure. It is to be understood that the described embodiments are only a few embodiments of the present disclosure, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without any inventive step, are within the scope of protection of the disclosure.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The terms "first," "second," and the like, as used in the description and in the claims of the present disclosure, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprise" or "comprises", and the like, means that the element or item listed before "comprises" or "comprising" covers the element or item listed after "comprising" or "comprises" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, which may also change accordingly when the absolute position of the object being described changes.

The embodiment of the present disclosure provides a pretreatment device of a packaging apparatus, the packaging apparatus is configured to fill contents in a package, the pretreatment device is configured to pretreat the package before the contents are filled; the pretreatment device includes a spray assembly configured to spray a spray into a package and including a plurality of sprayers, the package configured to move relative to the plurality of sprayers; wherein the plurality of sprayers are arranged not to be in the same line along the moving direction V of the package.

Above-mentioned this disclosed embodiment provides among the preprocessing device, when the packing moves to under a plurality of sprayers along the moving direction in proper order, because the position of a plurality of sprayers in the injection subassembly sets up to be not on same straight line, can avoid same position to be sprayed many times in the packing to improve and spray the homogeneity, improve the preliminary treatment effect.

The present disclosure is illustrated below by means of several specific examples. Detailed descriptions of known functions and known components may be omitted in order to keep the following description of the embodiments of the present disclosure clear and concise. When any component of an embodiment of the present disclosure appears in more than one drawing, that component may be referred to by the same reference numeral in each drawing.

Fig. 1 is a schematic structural diagram of a packaging apparatus according to an embodiment of the present disclosure. For example, the packaging apparatus 10 is used to fill the contents into a package 20 (i.e., a package). The contents include at least one of a solid and a liquid, such as a liquid or a liquid mixed with solid particles.

As shown in fig. 1, the package 20 is formed by a flat package sleeve 2. The flat packaging sleeves 2 are provided by bundles of packaging sleeves stacked in stacks.

For example, the packaging apparatus 10 includes a suction device 400, a forming device 500, a conveying device 600, a pretreatment device 700, and a filling device 800.

As shown in fig. 1, a suction device 400 is used to suck flat packaging sleeves 2 and to transfer packaging sleeves 2 to a forming device 500. For example, the suction device 400 includes a plurality of suction cups. During the suction of the suction cups, the flat packaging sleeve 2 is unfolded simultaneously into a three-dimensional packaging sleeve 2 (i.e. can be placed upright).

The forming device 500 is used to form the packaging sleeve 2 into a package 20 with a filling opening. For example, the upper side of the packing box 20 is opened as a filling opening. The molding apparatus 500 includes a rotating mechanism 501, a pre-folding mechanism 502, and a sealing mechanism 503. The rotating mechanism 501 is provided with a plurality of molding rods 510. The packaging sleeve 2 is transferred by the suction device 400 and fitted over the profiled rod 510. The rotating mechanism 501 is configured to rotate in a counterclockwise direction, for example, to drive the forming rod 510 and the packaging sleeve 2 sleeved thereon to rotate to the pre-folding mechanism 502.

The top or bottom opening of packaging sleeve 2 is pre-folded in pre-folding mechanism 502 and then sealed with pressing mechanism 503 to form package 20 with a filling opening. Subsequently, the packing box 20 is transferred to the transfer device 600, and a subsequent preprocessing process and a filling process are performed.

In order to keep the package 20 in a relatively fixed position on the conveying device 600, for example, the conveying device 600 includes a containing unit 601 for containing the package 20, the containing unit 601 being, for example, a sleeve with an open top, which facilitates insertion or removal of the package 20. The conveying apparatus 600 further includes a conveying belt 602, and the accommodating unit 601 is fixed to the conveying belt 602.

The conveying belt 602 conveys the packing box 20 to the preprocessing region T700 where the preprocessing device 700 is located. In the pretreatment area T700, the pretreatment device 700 performs pretreatment such as preheating, sterilization, drying on the packing box 20. Thereafter, the transfer belt 602 transfers the packing box 20 from the preprocessing section T700 to the filling section T800 where the filling device 800 is located. In the filling section T800, the filling device 800 fills the contents into the packing box 20 through the filling opening at the upper side of the packing box 20 and seals the filling opening of the packing box.

As shown in fig. 1, the pretreatment device 700 includes a plurality of spray assemblies including, for example, a first spray assembly 71, a second spray assembly 72, and a third spray assembly 73. For example, first spray assembly 71, second spray assembly 72, and third spray assembly 73 are configured to spray the same or different sprays, respectively, onto package 20. When different ejections are ejected, different effects can be achieved, and therefore, this is preferable. The term "plurality" in this disclosure means two or more.

For example, first spray assembly 71 is adapted to spray a first spray comprising a pre-heat, such as hot air, into package 20. Second spray assembly 72 is adapted to spray a second spray comprising a sterilizing substance, such as hydrogen peroxide, into package 20. The third spray assembly 73 is used to spray a third spray, which includes a desiccant, such as desiccant or dry air, into the package 20. After the package 20 passes through the three injection assemblies, it can be in a sterile state, which is advantageous for the subsequent filling process.

As shown in fig. 1, the pretreatment area T700 includes a first station T71, a second station T72, and a third station T73, which correspond to the positions of the first spray assembly 71, the second spray assembly 72, and the third spray assembly 73, respectively. The conveyor 602 transports the packages 20 in sequence to a first station T71, a second station T72 and a third station T73 to facilitate the sequential ejection of the three ejection assemblies into the packages 20.

The disclosed embodiment is described by taking three jetting assemblies as an example, and it is understood that one skilled in the art can select a suitable number of jetting assemblies, such as two or more than three integers, according to actual production needs. Since the number of stations (i.e., the first station 71, the second station 72, and the third station 73) in the pretreatment area T700 is the same as the number of jetting assemblies, when the number of jetting assemblies is changed, the number of stations is adjusted accordingly. The number of jetting assemblies or stations is not limited by the disclosed embodiments.

In the embodiment of the present disclosure, the arrangement sequence of the first injection assembly 71, the second injection assembly 72, and the third injection assembly 73 is only illustrative, and a person skilled in the art can adjust the sequence of the first injection assembly 71, the second injection assembly 72, and the third injection assembly 73 according to actual production needs, which is not limited by the present disclosure.

As shown in fig. 1, in the disclosed embodiment, each spray assembly includes a plurality of sprayers, including, for example, nozzles, which may be connected to a spray conduit in a packaging device, through which spray material is provided to the nozzles and sprayed through the nozzles into a package.

For example, the first spraying assembly 71 comprises a plurality of nozzles, for example comprising at least two nozzles, comprising nozzles 101, 102 (i.e. a first sprayer and a second sprayer), the two

nozzles

101, 102 being arranged aligned along the direction of movement V of the packet 20, so that, when the packet 20 enters the first station T71, the packet 20 reaches the nozzles 101 first and then the nozzles 102.

In the disclosed embodiment, nozzle 101 and nozzle 102 may inject the same or different substances into package 20. In the disclosed embodiment, first jetting assembly 71 is used to preheat package 20; in the case where the nozzle 101 and the nozzle 102 spray the same preheating substance, the preheating process can be made more controllable and conveniently adjustable, and is therefore preferred; in the case where the nozzle 101 and the nozzle 102 eject different preheating substances, it is possible to improve the preheating effect but the cost is high and it is inconvenient to adjust.

For example, the second spraying assembly 72 comprises a plurality of nozzles, for example comprising at least two nozzles, comprising

nozzles

201, 202, the two

nozzles

201, 202 being arranged aligned along the direction of movement V of the packages 20, so that, when a package 20 enters the second station T72 from the first station T71, the package 20 can reach the nozzle 201 first and then the nozzle 202.

In the disclosed embodiment, nozzle 201 and nozzle 202 may inject the same or different substances into package 20. In the disclosed embodiment, the second spraying assembly 72 is used for sterilizing the packaging box 20, and in case the nozzle 201 and the nozzle 202 spray the same sterilizing substance, the sterilizing process can be controlled and adjusted conveniently, so it is preferable; in the case where the nozzle 201 and the nozzle 202 spray different sterilizing substances, it is possible to improve the sterilizing effect but the cost is high and it is inconvenient to regulate.

For example, the third spraying assembly 73 comprises a plurality of nozzles, for example comprising at least two nozzles, comprising

nozzles

301, 302, the two

nozzles

301, 302 being arranged aligned along the direction of movement V of the packet 20, so that, when the packet 20 enters the third station T73 from the second station T72, the packet 20 reaches the nozzle 301 first and then the nozzle 302.

In the disclosed embodiment, nozzle 301 and nozzle 302 may inject the same or different substances into package 20. In the disclosed embodiment, the third spraying assembly 72 is used for drying the packing box 20, and in case that the nozzle 301 and the nozzle 302 spray the same drying object, the drying process can be controlled and adjusted conveniently, so it is preferable; in the case where the

nozzles

301 and 302 eject different drying materials, it is possible to improve the drying effect but the cost is high and it is inconvenient to adjust.

The embodiment of the present disclosure is described by taking the example that the first spraying assembly 71 includes two nozzles, the second spraying assembly 72 includes two nozzles, and the third spraying assembly 73 includes nozzles, it is understood that a person skilled in the art can select a suitable number of nozzles for each spraying assembly according to actual production needs, for example, an integer of two or more, and the number of nozzles in different spraying assemblies is not necessarily the same, and the number of nozzles in the first spraying assembly 71, the second spraying assembly 72, and the third spraying assembly 73 is not limited in the embodiment of the present disclosure.

In the disclosed embodiment, the plurality of nozzles of the spraying assembly are arranged not to be aligned in the moving direction V of the packing box 20. In the known packaging apparatus, a plurality of nozzles are arranged on the same straight line in the moving direction V, so that the jetting direction of each nozzle is the same and the jet ejected into the package also comes into contact with the same position in the package. Even after multiple times of spraying, the sprayed objects are not uniformly distributed on the inner wall of the packing box, and the spraying effect of each spraying assembly is influenced.

In the embodiment of the disclosure, the plurality of nozzles are arranged on different straight lines, so that the condition that the sprayed objects are sprayed to the same position of the packaging box every time can be avoided, the uniformity of the distribution of the sprayed objects in the packaging box is improved, and the spraying effect is improved.

In some embodiments, when the number of nozzles is two, the two nozzles are disposed not on the same line; when the number of the nozzles is three or more, every two adjacent nozzles are arranged not on the same straight line.

The arrangement of the nozzles in the spray assembly provided by the embodiment of the present disclosure is described below by taking the two

nozzles

101 and 102 of the first spray assembly 71 as the first nozzle and the second nozzle, respectively. It will be appreciated that the following arrangement is equally applicable to the two

nozzles

201, 202 of the second jetting assembly 72 and the two

nozzles

301, 302 of the third jetting assembly 73.

Referring to fig. 1 and 2, the receiving unit 601 includes a plurality of cartridges for receiving the packing boxes 20, the plurality of cartridges being arranged along a moving direction of the packing boxes 20. The plurality of sleeves includes, for example, a first sleeve 111 and a second sleeve 112. When the conveying belt 602 moves along the moving direction V, the first sleeve 111 is driven to move to the position of the second sleeve 112 along the moving direction V, and the packing boxes 20 in the first sleeve 111 are driven to move to the position of the packing boxes 20 in the second sleeve 112 along the moving direction V.

As shown in fig. 2, the first nozzle 101 corresponds to the first magazine 111 and the second nozzle 102 corresponds to the second magazine 112, such that the first nozzle 101 sprays the substance onto the packages 20 in the first magazine 111 first, and the second nozzle 102 sprays the substance onto the packages 20 in the second magazine 112 after the packages 20 are moved in the moving direction V.

In the embodiment of the present disclosure, the cross-sectional size and the cross-sectional shape of the first nozzle 101 and the second nozzle 102 may be the same or different. In general, the packing boxes 20 for mass production have uniform dimensions, and it is preferable to set the sectional dimensions and the sectional shapes of the first nozzle 101 and the second nozzle 102 to be the same, because it is advantageous to improve the uniformity of the product quality, analyze the ejection effects of the first nozzle 101 and the second nozzle 102, and adjust the parameters such as the position according to the analysis result. The embodiment of the present disclosure is described taking as an example that the sectional size and the sectional shape of the first nozzle 101 and the second nozzle 102 are all the same as each other.

As shown in fig. 2, for example, first spraying assembly 71 further comprises at least two spraying zones, comprising a first spraying zone 121 arranged in correspondence with first nozzle 101 and a second spraying zone 122 arranged in correspondence with second nozzle 102, and package 20 is moved in movement direction V from first spraying zone 121 to second spraying zone 122. The first ejection area 121 is located in a forward projection area of the first cartridge 111 on the xy plane, and the second ejection area 122 is located in a forward projection area of the second cartridge 122 on the xy plane.

In the disclosed embodiment, the first injection zone 121 and the second injection zone 122 are adjustable regions of the first nozzle 101 and the second nozzle 102, respectively, for example, when the position of the first nozzle 101 is adjusted within the xy plane shown in fig. 2, the outer edge of the first nozzle 101 does not exceed the first injection zone 121; similarly, when the position of the second nozzle 102 is adjusted within the xy plane shown in fig. 2, the outer edge of the second nozzle 102 does not exceed the second ejection area 122. That is, an orthogonal projection of the first nozzle 101 in a plane (i.e., xy plane) in which the first ejection region 121 is located falls within the first ejection region 121, and an orthogonal projection of the second nozzle 102 in a plane (i.e., xy plane) in which the second ejection region 122 is located falls within the second ejection region 122.

In the embodiment of the present disclosure, by providing the first spraying area 121 and the second spraying area 122, the positions of the first nozzle 101 and the second nozzle 102 are easily adjusted, which is beneficial to prevent the respective sprays of the first nozzle 101 and the second nozzle 102 from being sprayed out of the packing box 20.

In the disclosed embodiment, the shape of the injection zone (e.g., first injection zone 121) is determined according to the cross-sectional shape of the sleeve (e.g., first sleeve 111) in the xy-plane, and the cross-sectional shape of the sleeve is determined according to the cross-sectional shape of the package 20. Preferably, the shape of the ejection area, the cross-sectional shape of the cartridge, and the shape of the ejection area are all the same as one another.

For example, the sectional shape of the packing box 20 is a rectangle, and in order to ensure stability of the packing box 200 during transportation, the sectional shape of the first cartridge 111 and the shape of the first spraying region 121 are both rectangles. As shown in fig. 2, since the upper filling opening of the packing box 20 is pre-folded in the previous process, the hexagonal shape of the packing box 20 shown in fig. 2 is a sectional shape of the filling opening in a natural state, but the sectional shape of the bottom of the packing box 20 is still a rectangular shape, and the sectional shape of the first sleeve 111 and the shape of the first spraying area 121 are also rectangular.

Before the sterilization of the package 20, a preheating substance (e.g. hot air) is blown through the first and

second nozzles

101, 102 onto the package 20, on the one hand it is desirable to blow the package 20 clean by the hot air and on the other hand to heat the interior of the package 20 uniformly, so that a high reaction rate during the sterilization is achieved and condensate formation in the package is avoided.

If the first nozzle 101 and the second nozzle 102 are disposed on the same straight line, for example, on the center line O1O2 of the first ejection area 121 and the second ejection area 122 shown in fig. 2: when the package 20 is located in the first spraying zone 121, the hot air blown by the first nozzle 101 is sprayed toward the bottom surface of the package 20, and when the package moves from the first spraying zone 121 to the second spraying zone 122, the hot air blown by the second nozzle 102 is still sprayed toward the bottom surface of the package 20, which causes two problems: 1) Since only the bottom surface is purged with hot air, the hot air may not reach the side walls of the package, especially the upper side walls, resulting in residues on the upper side walls; 2) The bottom surface temperature is too high, so that the temperature distribution inside the packaging box is uneven, and the thermal stability is poor. Both of the above problems affect the subsequent disinfection and sterilization effects.

As shown in fig. 2, in the embodiment of the present disclosure, by disposing the first nozzle 101 and the second nozzle 102 not on the same line, the hot air blown by the first nozzle 101 and the second nozzle 102 is blown toward different positions in the package 20, on one hand, the blown area can be increased, and all areas inside the package can be blown away as far as possible, and on the other hand, the local area inside the package can be prevented from being blown away repeatedly, so that the temperature distribution is more uniform, thereby facilitating the subsequent sterilization.

In the embodiment of the present disclosure, "straight line" in "the first nozzle 101 and the second nozzle 102 are disposed not on the same straight line" refers to any straight line parallel to the moving direction of the packing box 20. In some embodiments, as shown in FIG. 2, the straight line includes, but is not limited to, the injection zone center connecting line O1O2, i.e., a straight line passing through the first center O1 of the first injection zone 121 and the second center O2 of the second injection zone 122.

In some embodiments, the first nozzle 101 and the second nozzle 102 are offset by a distance in the x-direction, as seen in the direction of movement V. That is, the first nozzle 101 and the second nozzle 102 do not overlap in the moving direction V. Fig. 3 is a side view of a first nozzle and a second nozzle of an embodiment of the present disclosure. As shown in fig. 3, the first nozzle 101 and the second nozzle 102 are offset from each other by a distance in the x direction, and do not overlap each other in the moving direction V. Fig. 4 is a side view of a first nozzle and a second nozzle of another embodiment of the present disclosure. As shown in fig. 4, the first nozzle 101 and the second nozzle 102 are offset from each other by a distance in the x direction, and the two partially overlap in the moving direction V.

In the embodiment of the present disclosure, the first nozzle 101 and the second nozzle 102 are staggered by a certain distance in the x direction, so that the first nozzle 101 and the second nozzle 102 can further blow hot air towards different positions of the packing box 20, and further uniformity of heat distribution in the packing box is improved, and a preheating effect is improved.

As shown in fig. 2, the first nozzle 101 and the second nozzle 102 are located on opposite sides of the injection zone center line O1O2, respectively. For example, the injection zone center line O1O2 includes a first side (e.g., a left side L11 shown in the drawing) and a second side (e.g., a right side R11 shown in the drawing) that are opposite to each other in the x direction. The first nozzle 101 is located on the left side L11, and the second nozzle 102 is located on the right side R11.

On the premise that the first nozzle 101 and the second nozzle 102 are not arranged on the same straight line, if the first nozzle 101 and the second nozzle 102 are arranged on a single side (for example, the left side L11 or the right side R11) of the central connecting line O1O2 of the spraying area, which is equivalent to the case that the packing box 20 is heated only in the area near the left side wall or the right side wall thereof, the opposite side wall is hardly directly sprayed with the preheating material and is heated less, thereby causing a large temperature difference between the left side wall and the right side wall of the packing box 20.

In this embodiment, the first nozzle 101 and the second nozzle 102 are respectively disposed at the left and right sides of the central line O1O2 of the spraying area, so that the preheating material can be sprayed to the left and right side walls of the packing box 20, thereby reducing the temperature difference between the left and right side walls, making the packing box 20 heated more uniformly, the heat distribution more uniformly, and the thermal stability better.

The first nozzle 101 is located on the left side L11 and the second nozzle 102 is located on the right side R11 in the embodiment of the present disclosure, but it should be understood that the first nozzle 101 may be located on the right side R11 and the second nozzle 102 may be located on the left side L11 in other embodiments, which can also achieve the above-mentioned effects, and the embodiment of the present disclosure is not limited thereto.

It should be noted that, in the case of the first nozzle 101 or the second nozzle 102, when the nozzle is located on the left side or the right side of the injection zone center connecting line O1O2, the case where the nozzle intersects with the injection zone center connecting line O1O2 is included, and the case where the nozzle does not intersect with the injection zone center connecting line O1O2 is also included. In addition, the phrase "the nozzle intersects with the central connecting line O1O2 of the injection region" includes that the nozzle intersects with the central connecting line O1O2 of the injection region at one point (i.e. the two are tangent), and also includes that the nozzle intersects with the central connecting line O1O2 of the injection region at two points (for example, the case shown in fig. 5), which is not limited in this disclosure. For example, fig. 2 shows a case where neither the first nozzle 101 nor the second nozzle 102 intersects the ejection area center line O1O 2.

FIG. 5 is a top view of two nozzles of a first jetting assembly according to another embodiment of the present disclosure. In contrast to fig. 2, fig. 5 shows a case where both the first nozzle 101 and the second nozzle 102 intersect the injection zone center line O1O 2. In the case where one of the first nozzle 101 and the second nozzle 102 intersects the injection zone center connecting line O1O2 and the other does not intersect the injection zone center connecting line O1O2, those skilled in the art can imagine the case shown in fig. 2 and 5, and therefore, the detailed description thereof will be omitted.

It should be noted that, in the embodiment of the present disclosure, whether the first nozzle 101 or the second nozzle 102 is located on the left side L11 or the right side R11 of the injection area center connecting line O1O2 is determined according to the position of the injection center of each nozzle relative to the injection area center connecting line O1O 2.

For example, as shown in fig. 2 and 5, the first nozzle 101 has a first ejection center 101O, the second nozzle 102 has a second ejection center 102O, and the first ejection center 101O and the second ejection center 102O are respectively located on the left side L11 and the right side R11 of the ejection-area-center-connecting line O1O2, it is determined that the first nozzle 101 and the second nozzle 102 are respectively located on the left side L11 and the right side R11 of the ejection-area-center-connecting line O1O 2.

As shown in fig. 2, for example, the first injection center 101O has a first vertical distance D11 from the injection zone center connecting line O1O2, the second injection center 102O has a second vertical distance D12 from the injection zone center connecting line O1O2, and the first vertical distance D11 and the second vertical distance D12 may be equal or unequal. When the first vertical distance D11 is equal to the second vertical distance D12, the distance from the first nozzle 101 to the left sidewall of the packing box 20 is equal to the distance from the second nozzle 101 to the right sidewall of the packing box 20, so that the regions of the packing box 20 close to the left sidewall and the right sidewall are closer to the same degree of heating in view of the preheating effect, thereby further improving the uniformity of temperature distribution in the packing box and improving thermal stability. In this embodiment, the first vertical distance D11 ranges from 5 to 20mm, and the second vertical distance D12 ranges from 5 to 20mm.

As shown in fig. 2, for example, the first injection region 121 has a first injection region center line P11 perpendicular to the injection region center line O1O2, and the second injection region 122 has a second injection region center line P12 perpendicular to the injection region center line O1O 2. The first nozzle 101 is located on a side of the first spray zone center line P11 away from the second spray zone 122, and the second nozzle 102 is located on a side of the second spray zone center line P12 away from the first spray zone 121.

For example, the first ejection area centerline P11 includes a first side (e.g., an upper side UP11 shown in the drawing) and a second side (e.g., a lower side DP11 shown in the drawing) opposite to each other in the y direction (i.e., the moving direction V) in which the upper side UP11 is close to the second ejection area 122 and the lower side DP11 is far from the second ejection area 122. The second ejection region center line P12 includes a first side (e.g., an upper side UP12 shown in the drawing) and a second side (e.g., a lower side DP12 shown in the drawing) opposite to each other in the y direction (i.e., the moving direction V) in which the lower side DP12 is close to the first ejection region 121 and the upper side UP12 is far from the first ejection region 121. In the present embodiment, the first nozzle 101 is located on the lower side DP11 of the first spray zone center line P11, and the second nozzle 102 is located on the upper side UP12 of the second spray zone center line P12.

If the first nozzle 101 is disposed at the lower side DP11 of the first spraying section center line P11 and the second nozzle 102 is disposed at the lower side DP12 of the second spraying section center line P12, the area near the upper side wall in the packing box 20 is hardly directly sprayed with the preheating material, where the heating is small, thus resulting in a large temperature difference between the upper side wall and the lower side wall of the packing box 20. Similarly, if the first nozzle 101 is disposed at the upper side UP11 of the first spraying section center line P11 and the second nozzle 102 is disposed at the upper side UP12 of the second spraying section center line P12, the area near the lower sidewall in the packing box 20 is hardly directly sprayed with the preheating substance, where the heating is small, thus resulting in a large temperature difference between the upper sidewall and the lower sidewall of the packing box 20.

In the present embodiment, by disposing the first nozzle 101 at the lower side DP11 of the first spray zone center line P11 and the second nozzle 102 at the upper side UP12 of the second spray zone center line P12, the preheating substance can be sprayed to the vicinity of the upper and lower side walls of the packing box 20, thereby reducing the temperature difference between the upper and lower side walls, making the heating of the packing box 20 more uniform, the heat distribution also more uniform, and the thermal stability better.

The embodiment of the present disclosure is described by taking the example that the first nozzle 101 is located at the lower side DP11 of the first spraying area center line P11 and the second nozzle 102 is located at the upper side UP12 of the second spraying area center line P12, it is understood that in other embodiments, the first nozzle 101 may be located at the side of the first spraying area center line P11 close to the second spraying area 122 and the second nozzle 102 may be located at the side of the second spraying area center line P12 close to the first spraying area 121, and the above-mentioned effects can be achieved as well. In some embodiments, the first nozzle 101 is located at an upper side UP12 of the centerline P11 of the first spraying region and the second nozzle 102 is located at a lower side DP11 of the centerline P12 of the second spraying region, which also allows the preheated material to be sprayed near the upper and lower sidewalls of the package 20, thereby reducing the temperature difference between the upper and lower sidewalls, resulting in a more uniform heating of the package 20, a more uniform heat distribution, and better thermal stability.

It should be noted that, regardless of the first nozzle 101 or the second nozzle 102, when referring to the nozzles being located on the upper side or the lower side of the transverse center line (including the first injection region center line P11 and the second injection region center line P12), the case where the nozzles intersect with the transverse center line is included, and the case where the nozzles do not intersect with the transverse center line is also included. In addition, "the nozzle intersects the transverse centerline" includes both the nozzle intersecting the transverse centerline at one point (i.e., both tangent points) and the nozzle intersecting the transverse centerline at two points (such as shown in fig. 5), which is not limited in this disclosure.

For example, fig. 2 shows a case where the first nozzle 101 does not intersect the first injection zone center line P11 and the second nozzle 102 does not intersect the second injection zone center line P12.

FIG. 6 is a top view of two nozzles of a first jetting assembly according to yet another embodiment of the present disclosure. In contrast to fig. 2, fig. 6 shows a case where the first nozzle 101 intersects the first injection zone center line P11 and the second nozzle 102 intersects the second injection zone center line P12. In the case where one of the first nozzle 101 and the second nozzle 102 intersects the injection zone center connecting line O1O2 and the other does not intersect the injection zone center connecting line O1O2, those skilled in the art can imagine the case of fig. 2 and 5, and the detailed description thereof will be omitted.

In the embodiment of the present disclosure, whether the nozzle is located on the upper side or the lower side of the transverse centerline is determined by looking at the position of the ejection center of the nozzle with respect to the transverse centerline.

For example, as shown in fig. 2 and 5, the first ejection center 101O is located on the lower side DP11 of the first ejection area center line P11, and it is determined that the first nozzle 101 is located on the lower side DP11 of the first ejection area center line; similarly, the second jet center 102O is located on the upper side UP12 of the second jet zone centerline P12, and the second nozzle 102 is determined to be located on the upper side UP12 of the second jet zone centerline P12.

As shown in fig. 2, for example, the first injection center 101O has a third perpendicular distance D13 from the first injection zone center line P11, the second injection center 102O has a fourth perpendicular distance D14 from the second injection zone center line P12, and the third perpendicular distance D13 and the fourth perpendicular distance D14 may be equal or may not be equal.

As shown in fig. 2, the conveying belt 602 functions to carry the sleeve 601 to convey the packing boxes 20 to below the first nozzle 101 and the second nozzle 102 in sequence. When the conveyor belt 602 is used for a long period of time, slack occurs. If the conveyor 602 is loose, the position of the sleeve 601 with respect to the nozzles, i.e., the position of the packages 20 with respect to the nozzles, changes.

In some embodiments, to avoid the effect on the preheating effect after the conveyor belt 602 is loosened, the fourth vertical distance D14 and the third vertical distance D13 are set to be unequal. For example, the fourth vertical distance D14 is set to be smaller than the third vertical distance D13 to bring the second nozzles 102 located downstream of the conveyor 602 closer to the first ejection area center line P12, so that even if the conveyor 602 is slackened in the y direction, the slackened second nozzles 102 are ensured to be located in the second ejection area 122.

In this embodiment, the third vertical distance D13 is set to be 0 to 20mm, the fourth vertical distance D14 is set to be 0 to 20mm, considering that the maximum slack length of the conveyor belt 602 during preheating is 1.9mm, the third vertical distance D13 is set to be 0, and the fourth vertical distance D14 is set to be 0, at this time, in the moving direction V, the shortest distance from the nozzle 102 to the inner wall of the packing box is about 18mm, and the shortest distance from the nozzle 101 to the inner wall of the packing box is about 18mm.

Fig. 2 and 6 illustrate a case where the first jet center 101O does not coincide with the first jet zone centerline P11 and the second jet center 102O does not coincide with the second jet zone centerline P12, however, in other embodiments of the present disclosure, it may be provided as follows: the first spray center 101O coincides with the first spray zone centerline P11 and/or the second spray center 102O coincides with the second spray zone centerline P12.

FIG. 7 is a top view of two nozzles of a first jetting assembly of yet another embodiment of the present disclosure. In contrast to fig. 2, fig. 7 shows a case where the first injection center 101O coincides with the first injection region center line P11 and the second injection center 102O coincides with the second injection region center line P12. For the case where the first injection center 101O coincides with the first injection zone center line P11 and the second injection center 102O does not coincide with the second injection zone center line P12, and the first injection center 101O does not coincide with the first injection zone center line P11 and the second injection center 102O coincides with the second injection zone center line P12, those skilled in the art can imagine from the illustration of fig. 2 and 7, and will not be described in detail here.

As shown in fig. 8, the first nozzle 101 and the second nozzle 102 of comparative example 1 are arranged on the same straight line in the moving direction V of the packing box.

As shown in fig. 8, the first nozzle 101 and the second nozzle 102 in examples 1 and 2 are not arranged on the same straight line, and the difference therebetween is that: the first nozzle 101 of example 1 is located on the side of the first ejection-zone center line P11 away from the second ejection zone, and the second nozzle 102 is located on the side of the second ejection-zone center line P12 close to the first ejection zone; the first nozzle 101 of example 2 is located on the side of the first ejection area center line P11 away from the second ejection area, and the second nozzle 102 is located on the side of the second ejection area center line P12 away from the first ejection area.

In comparative example 1 and examples 1 and 2, the bottom surface of the packing box was square with a side of 50mm, and the first nozzle 101 and the second nozzle 102 were the same in shape and size, were both circular, and had a diameter of about 13mm.

Table 1 shows Delta T temperature differential measurements in the package at position 1 (corresponding to the first spray zone) and position 2 (corresponding to the second spray zone) for comparative example 1 and examples 1, 2. Delta T represents the difference between the highest temperature and the lowest temperature of the inner surface of the package. The Delta T testing instrument is a DataPAQ PA615S type temperature sensor, and the testing conditions are as follows: the temperature of the hot air injected in both nozzles was about 172 degrees celsius and the gas pressure was about 65mmWc.

TABLE 1

	Position 1, delta T	Position	2,Delta T
				Comparative example 1	21.2	24.7
Example 1	14.8	19.3
			Example 2	10.9	18.1

As can be seen from Table 1, delta T of examples 1 and 2 is lower than that of comparative example 1, which shows that when the first nozzle 101 and the second nozzle 102 are not arranged on the same straight line, the temperature difference in the package box is lower, so that the uniformity of heat distribution in the package box is improved, and the preheating effect is better.

Further, as can be seen from the comparison of the test results of example 1 and example 2, by disposing the first nozzle 101 on the side of the first ejection-zone center line P11 away from the second ejection-zone center line P12 and disposing the second nozzle 102 on the side of the second ejection-zone center line P12 away from the first ejection-zone center line P12 (i.e., on both outer sides of the two ejection-zone center lines P11, P12), it is possible to further improve the reduction of the temperature difference within the package, thereby improving the uniformity of the heat distribution.

The cross-sectional shapes of the first nozzle 101 and the second nozzle 102 are circular in the embodiment of the present disclosure, and it is understood that the cross-sectional shapes of the first nozzle 101 and the second nozzle 102 may be other shapes such as square, triangle, ellipse, and the like in other embodiments, which is not limited by the present disclosure.

In the embodiment of the present disclosure, the diameter of the first nozzle 101 and the second nozzle 102 is 10mm to 18mm, for example, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, preferably 12mm to 14mm, and more preferably 13mm.

As shown in fig. 9, the first nozzle 101 and the second nozzle 102 in examples 3 and 4 are not arranged on the same straight line, and the difference between them is that: the first nozzle 101 and the second nozzle 102 of example 3 each had a diameter of 13mm, and the first nozzle 101 and the second nozzle 102 of example 4 each had a diameter of 15mm.

Fig. 10 shows Delta T temperature differential test results within the package at position 1 (corresponding to the first injection zone) and position 2 (corresponding to the second injection zone) for examples 3 and 4 of the present disclosure. The package and other test conditions and test equipment are the same as in the previous example and will not be described further herein.

Fig. 11 shows a plot of Delta T temperature difference versus gas pressure within a package in examples 3 and 4 of the present disclosure. Fig. 12 shows a graph of Delta T temperature difference versus hot air temperature within the package in examples 3 and 4 of the present disclosure. In FIG. 11, the gas pressure is 30 to 70mmwc, and in FIG. 12, the hot air temperature is 150 to 190 ℃.

As can be seen from fig. 10, 11 and 12, when the diameter of the first nozzle 101 and the second nozzle 102 is about 13mm, the temperature difference in the package is low, and thus the uniformity of the heat distribution in the package is improved and the preheating effect is better. Also, the temperature difference within the package decreases with decreasing pressure (fig. 11), and the temperature difference within the package decreases with decreasing temperature (fig. 12).

As can be seen from the above test results, for the first spraying assembly 71, if the first nozzle 101 and the second nozzle 102 are arranged on the same straight line along the moving direction V, the hot air sprayed from each nozzle is sprayed to the same position in the packing box 20, which results in poor preheating uniformity, thereby causing uneven heat distribution in the packing box and affecting the subsequent sterilization effect. However, when the first nozzle 101 and the second nozzle 102 are disposed not on the same line in the moving direction V, the heat in the package is more uniformly distributed and the preheating effect is better.

The arrangement of the nozzles in the second spraying assembly provided by the embodiment of the present disclosure is described below by taking the two

nozzles

201 and 202 of the second spraying assembly 72 as the first nozzle and the second nozzle, respectively.

As shown in fig. 13, the first nozzle 201 corresponds to the first box 211, and the second nozzle 202 corresponds to the second box 222, such that the first nozzle 201 sprays the substance to the packing box 20 in the first box 211, and the second nozzle 202 sprays the substance to the packing box 20 in the second box 222 after the packing box 20 moves in the moving direction V.

In the embodiment of the present disclosure, the cross-sectional size and the cross-sectional shape of the first nozzle 201 and the second nozzle 202 may be the same or different. In general, the packing boxes 20 for mass production have uniform dimensions, and it is preferable to set the sectional dimensions and the sectional shapes of the first nozzle 201 and the second nozzle 202 to be the same, because it is advantageous to improve the uniformity of the product quality, analyze the ejection effects of the first nozzle 201 and the second nozzle 202, and adjust the parameters such as the position according to the analysis result. The embodiment of the present disclosure is described taking as an example that the sectional size and the sectional shape of the first nozzle 201 and the second nozzle 202 are all the same as each other.

As shown in fig. 13, for example, the second spraying assembly 72 further includes at least two spraying zones including a first spraying zone 221 provided corresponding to the first nozzle 201 and a second spraying zone 222 provided corresponding to the second nozzle 202, and the packing box 20 moves from the first spraying zone 221 to the second spraying zone 222 along the moving direction V. The first ejection region 221 is located in a forward projection region of the first cartridge 211 on the xy plane, and the second ejection region 222 is located in a forward projection region of the second cartridge 222 on the xy plane.

In the disclosed embodiment, the first injection zone 221 and the second injection zone 222 are adjustable regions of the first nozzle 201 and the second nozzle 202, respectively, for example, when the position of the first nozzle 201 is adjusted within the xy plane shown in fig. 13, the outer edge of the first nozzle 201 does not exceed the first injection zone 221; similarly, when the position of the second nozzle 202 is adjusted within the xy plane shown in fig. 13, the outer edge of the second nozzle 202 does not exceed the second ejection area 222. That is, an orthogonal projection of the first nozzle 201 in a plane (i.e., xy plane) in which the first ejection region 221 is located falls within the first ejection region 221, and an orthogonal projection of the second nozzle 202 in a plane (i.e., xy plane) in which the second ejection region 222 is located falls within the second ejection region 222.

In the embodiment of the present disclosure, by providing the first spraying section 221 and the second spraying section 222, the positions of the first nozzle 201 and the second nozzle 202 are easily adjusted, which is beneficial to prevent respective sprays of the first nozzle 201 and the second nozzle 202 from being sprayed out of the packing box 20.

In the disclosed embodiment, the shape of the injection zone (e.g., the first injection zone 221) is determined according to the cross-sectional shape of the cartridge (e.g., the first cartridge 211) in the xy-plane, and the cross-sectional shape of the cartridge is determined according to the cross-sectional shape of the packing box 20. Preferably, the shape of the ejection area, the cross-sectional shape of the cartridge, and the shape of the ejection area are all the same as one another.

For example, the sectional shape of the packing box 20 is rectangular, and in order to ensure stability of the packing box 200 during transportation, the sectional shape of the first socket 211 and the shape of the first spraying section 221 are both rectangular. As shown in fig. 13, since the upper filling opening of the packing box 20 is pre-folded in the previous process, the hexagonal shape of the packing box 20 shown in fig. 13 is a sectional shape of the filling opening in a natural state, but the sectional shape of the bottom of the packing box 20 is still rectangular, and the sectional shape of the first pocket 211 and the shape of the first spraying section 221 are also rectangular.

In sterilizing the packing box 20, a sterilizing material such as hydrogen peroxide is blown to the packing box 20 by the first and

second nozzles

201 and 202 to achieve a sterilizing effect.

If the first nozzle 201 and the second nozzle 202 are disposed on the same straight line, for example, on the center line O3O4 of the first injection region 221 and the second injection region 222 shown in fig. 13: when the packing box 20 is located in the first spraying area 221, the hydrogen peroxide sprayed from the first nozzle 201 will be sprayed toward the bottom surface of the packing box 20, and when the packing box moves from the first spraying area 221 to the second spraying area 222, the hydrogen peroxide sprayed from the second nozzle 202 will still be sprayed toward the bottom surface of the packing box 20, and the hydrogen peroxide may not reach the side wall and the corner between the side walls, especially the upper side wall of the packing box, which may affect the subsequent sterilization effect.

As shown in fig. 13, in the embodiment of the present disclosure, the first nozzle 201 and the second nozzle 202 are arranged not on the same line, so that the hydrogen peroxide sprayed from the first nozzle 201 and the second nozzle 202 is sprayed toward different positions in the packing box 20, thereby increasing the sterilization area and improving the sterilization effect.

In the embodiment of the present disclosure, "straight line" in "the first nozzle 201 and the second nozzle 202 are disposed not on the same straight line" refers to any straight line parallel to the moving direction of the packing box 20. In some embodiments, as shown in FIG. 13, the straight line includes, but is not limited to, the injection zone center line O3O4, i.e., a straight line passing through the first center O3 of the first injection zone 221 and the second center O4 of the second injection zone 222.

In some embodiments, the first nozzle 201 and the second nozzle 202 are offset by a distance in the x-direction, as seen in the direction of movement V. That is, the first nozzle 201 and the second nozzle 202 do not overlap in the moving direction V. For example, the first nozzle 201 and the second nozzle 202 are shifted from each other by a certain distance in the x direction, and do not overlap each other in the moving direction V. As another example, the first nozzle 201 and the second nozzle 202 are offset from each other by a distance in the x direction, and partially overlap in the moving direction V. The specific positional relationship between the first nozzle 201 and the second nozzle 202 can be referred to the positional relationship shown in fig. 3 and 4, and will not be repeated here.

In the embodiment of the present disclosure, the first nozzle 201 and the second nozzle 202 are staggered by a certain distance in the x direction, so that the first nozzle 201 and the second nozzle 202 can be further ensured to spray hydrogen peroxide towards different positions of the packaging box 20, and further the sterilization area in the packaging box is increased, and the sterilization effect is improved.

As shown in fig. 13, the first nozzle 201 and the second nozzle 202 are located on opposite sides of the injection zone center line O3O4, respectively. For example, the ejection-zone center-line O3O4 includes a first side (e.g., a left side L21 shown in the drawing) and a second side (e.g., a right side R21 shown in the drawing) that are opposite to each other in the x direction. The first nozzle 201 is located on the left side L21, and the second nozzle 202 is located on the right side R21.

On the premise that the first nozzle 201 and the second nozzle 202 are not arranged on the same straight line, if the first nozzle 201 and the second nozzle 202 are arranged on a single side (for example, the left side L21 or the right side R21) of the central connecting line O3O4 of the spraying area, it is equivalent to that the packing box 20 is sprayed with the sterilizing liquid only in the area close to the left side wall or the right side wall thereof, and the opposite side wall is hardly sprayed with the sterilizing liquid directly, thus resulting in that the sterilizing area of the packing box 20 is not comprehensive or uneven.

In this embodiment, the first nozzle 201 and the second nozzle 202 are respectively disposed at the left side and the right side of the central connecting line O3O4 of the spraying area, so that the hydrogen peroxide can be sprayed to the vicinity of the left side wall and the right side wall of the packing box 20, thereby increasing the sterilization area or the sterilization area and improving the sterilization effect.

The first nozzle 201 is located on the left side L21 and the second nozzle 202 is located on the right side R21 in the embodiment of the present disclosure, but it should be understood that the first nozzle 201 may be located on the right side R21 and the second nozzle 202 may be located on the left side L21 in other embodiments, which can also achieve the above-mentioned effects, and the embodiment of the present disclosure is not limited thereto.

It should be noted that, in the case of the first nozzle 201 or the second nozzle 202, when the nozzle is located on the left side or the right side of the injection zone center connecting line O3O4, the case where the nozzle intersects with the injection zone center connecting line O3O4 is included, and the case where the nozzle does not intersect with the injection zone center connecting line O3O4 is also included. In addition, the phrase "the nozzle intersects with the central connecting line O3O4 of the injection zone" includes both the nozzle intersects with the central connecting line O3O4 of the injection zone at one point (i.e. the nozzle is tangent to the central connecting line O3O4 of the injection zone) and the nozzle intersects with the central connecting line O3O4 of the injection zone at two points (for example, the case shown in fig. 5), which is not limited in this disclosure.

In some embodiments, neither the first nozzle 201 nor the second nozzle 202 intersects the injection zone center line O3O4 (as shown in fig. 13). In other embodiments, both the first nozzle 201 and the second nozzle 202 intersect the injection zone center line O3O4 (as shown in fig. 5). In still other embodiments, one of the first nozzle 201 and the second nozzle 202 intersects the injection zone center line O3O4, and the other does not intersect the injection zone center line O3O 4.

It should be noted that in the embodiment of the present disclosure, whether the first nozzle 201 or the second nozzle 202 is located on the left side L21 or the right side R21 of the injection area center connecting line O3O4 is determined according to the position of the injection center of each nozzle relative to the injection area center connecting line O3O 4.

As shown in fig. 13, for example, the first nozzle 201 has a first ejection center 201O, the second nozzle 202 has a second ejection center 202O, and the first ejection center 201O and the second ejection center 202O are respectively located on the left side L21 and the right side R21 of the ejection area center connecting line O3O4, and it is determined that the first nozzle 201 and the second nozzle 202 are respectively located on the left side L21 and the right side R21 of the ejection area center connecting line O3O 4.

As shown in fig. 13, for example, the first injection center 201O has a first vertical distance D21 from the injection zone center connecting line O3O4, the second injection center 202O has a second vertical distance D22 from the injection zone center connecting line O3O4, and the first vertical distance D21 and the second vertical distance D22 may be equal or unequal. When the first vertical distance D21 is equal to the second vertical distance D22, the distance from the first nozzle 201 to the left side wall of the packing box 20 is equal to the distance from the second nozzle 201 to the right side wall of the packing box 20, so that the regions of the packing box 20 close to both the left and right side walls can be sprayed with the hydrogen peroxide from the viewpoint of sterilization effect. In this embodiment, the first vertical distance D21 ranges from 5 to 20mm, and the second vertical distance D22 ranges from 5 to 20mm.

As shown in fig. 13, for example, the first injection region 221 has a first injection region center line P21 perpendicular to the injection region center line O3O4, and the second injection region 222 has a second injection region center line P22 perpendicular to the injection region center line O3O 4. The first nozzle 201 is located on a side of the first ejection region center line P21 away from the second ejection region 222, and the second nozzle 202 is located on a side of the second ejection region center line P22 away from the first ejection region 221.

For example, the first ejection area center line P21 includes a first side (e.g., an upper side UP21 shown in the drawing) and a second side (e.g., a lower side DP21 shown in the drawing) opposite to each other in the y direction (i.e., the moving direction V) in which the upper side UP21 is close to the second ejection area 222 and the lower side DP21 is away from the second ejection area 222. The second ejection region center line P22 includes a first side (e.g., an upper side UP22 shown in the drawing) and a second side (e.g., a lower side DP22 shown in the drawing) opposite to each other in the y direction (i.e., the moving direction V) in which the lower side DP22 is close to the first ejection region 221 and the upper side UP22 is away from the first ejection region 221. In the present embodiment, the first nozzle 201 is located on the lower side DP21 of the first spray zone center line P21, and the second nozzle 202 is located on the upper side UP22 of the second spray zone center line P22.

If the first nozzle 201 is disposed at the lower side DP21 of the first spray zone center line P21 and the second nozzle 202 is disposed at the lower side DP22 of the second spray zone center line P22, the area near the upper sidewall in the packing box 20 is hardly directly sprayed with hydrogen peroxide. Likewise, if the first nozzle 201 is disposed at the upper side UP21 of the first spray zone center line P21 and the second nozzle 202 is disposed at the upper side UP22 of the second spray zone center line P22, the region near the lower side wall inside the packing box 20 is hardly directly sprayed with hydrogen peroxide.

In the present embodiment, by disposing the first nozzle 201 at the lower side DP21 of the first spray zone center line P21 and disposing the second nozzle 202 at the upper side UP22 of the second spray zone center line P22, the hydrogen peroxide can be sprayed to the vicinity of the upper and lower side walls of the packing box 20, thereby increasing the sterilization area or sterilization area and improving the sterilization effect of the packing box.

The embodiment of the present disclosure is described by taking the example that the first nozzle 201 is located at the lower side DP21 of the first spraying region center line P21 and the second nozzle 202 is located at the upper side UP22 of the second spraying region center line P22, and it is understood that in other embodiments, the first nozzle 201 may be located at the side of the first spraying region center line P21 close to the second spraying region 222 and the second nozzle 202 may be located at the side of the second spraying region center line P22 close to the first spraying region 221, and the above-mentioned effects can be achieved. In some embodiments, the first nozzle 201 is located at the upper side UP22 of the first spray zone centerline P21 and the second nozzle 202 is located at the lower side DP21 of the second spray zone centerline P22, which also allows hydrogen peroxide to be sprayed near the upper and lower sidewalls of the package 20, thereby increasing the sterilization area and sterilization effectiveness for the package.

It should be noted that, in both the first nozzle 201 and the second nozzle 202, when the nozzle is located on the upper side or the lower side of the transverse centerline (including the first spray region centerline P21 and the second spray region centerline P22), the nozzle intersects with the transverse centerline, and the nozzle does not intersect with the transverse centerline. In addition, "the nozzle intersects the transverse centerline" includes both the nozzle intersecting the transverse centerline at one point (i.e., both tangent lines) and the nozzle intersecting the transverse centerline at two points (e.g., as shown in fig. 5), which is not limited by the embodiments of the present disclosure.

In some embodiments, the first nozzle 201 does not intersect the first injection zone centerline P21 and the second nozzle 202 does not intersect the second injection zone centerline P22 (as shown in fig. 13). In other embodiments, the first nozzle 201 intersects the first injection zone centerline P21 and the second nozzle 202 intersects the second injection zone centerline P22 (see fig. 6). In still other embodiments, one of the first nozzle 201 and the second nozzle 202 intersects the injection zone center line O3O4, and the other does not intersect the injection zone center line O3O 4.

As shown in fig. 13, for example, the first ejection center 201O is located on the lower side DP21 of the first ejection-zone center line P21, and it is determined that the first nozzle 201 is located on the lower side DP21 of the first ejection-zone center line; similarly, the second injection center 202O is located on the upper side UP22 of the second injection zone centerline P22, and it is determined that the second nozzle 202 is located on the upper side UP22 of the second injection zone centerline P22.

As shown in fig. 13, for example, the first injection center 201O has a third perpendicular distance D23 from the first injection zone center line P21, the second injection center 202O has a fourth perpendicular distance D24 from the second injection zone center line P22, and the third perpendicular distance D23 and the fourth perpendicular distance D24 may be equal or may not be equal.

As shown in fig. 13, the conveying belt 602 functions to carry the sleeve 601 to convey the packing boxes 20 to below the first nozzle 201 and the second nozzle 202 in sequence. When the conveyor belt 602 is used for a long period of time, slack occurs. If the conveyor 602 is loose, the position of the sleeve 601 with respect to the nozzles, i.e., the position of the packages 20 with respect to the nozzles, changes.

In some embodiments, to avoid the influence of the slack of the conveyor belt 602 on the sterilization effect, the fourth vertical distance D24 and the third vertical distance D23 are set to be unequal. For example, the fourth vertical distance D24 is set smaller than the third vertical distance D23 to bring the second nozzles 202 located downstream of the conveyor 602 closer to the first ejection area center line P22, so that even if the conveyor 602 is slackened in the y direction, the slackened second nozzles 202 are ensured to be located in the second ejection area 222.

In this embodiment, the range of the third vertical distance D23 is set to 0 to 20mm, and the range of the fourth vertical distance D24 is set to 0 to 20mm. Considering that the maximum slack length of the conveyor belt 602 during sterilization is 2.9mm, the value range of the third vertical distance D23 is set to 0, and the value range of the fourth vertical distance D24 is set to 5mm; at this time, the shortest distance from the nozzle 201 to the inner wall of the packing box in the moving direction V is about 14mm, and the shortest distance from the nozzle 202 to the inner wall of the packing box is about 16mm.

Fig. 13 illustrates a case where the first jet center 201O does not coincide with the first jet zone centerline P21 and the second jet center 202O does not coincide with the second jet zone centerline P22, however, in other embodiments of the present disclosure, it may be arranged as follows: first injection center 201O coincides with first injection zone centerline P21 and/or second injection center 202O coincides with second injection zone centerline P22.

In some embodiments, first jet center 201O coincides with first jet zone centerline P21 and second jet center 202O coincides with second jet zone centerline P22 (shown with reference to fig. 7). In other embodiments, first jet center 201O coincides with first jet zone centerline P21 and second jet center 202O does not coincide with second jet zone centerline P22; in still other embodiments, first jet center 201O is not coincident with first jet zone centerline P21 and second jet center 202O is coincident with second jet zone centerline P22.

In the embodiment of the present disclosure, the diameter of the first nozzle 201 and the second nozzle 202 is 10mm to 18mm, for example, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, preferably 12mm to 14mm, and more preferably 13mm.

Fig. 14 is a top view of two nozzles in the second jetting assemblies of comparative example 2, comparative example 3, example 5, and example 6 of the present disclosure. Fig. 15 is a top view of two nozzles in the second jetting assembly of example 7 of the present disclosure.

As shown in fig. 14, the first nozzle 201 and the second nozzle 202 of comparative examples 1 and 2 are arranged on the same straight line in the moving direction V of the packing box.

As shown in fig. 14 and 15, the first nozzle 201 and the second nozzle 202 in examples 5, 6, and 7 are not disposed on the same straight line.

The diameters of the first nozzle 201 and the second nozzle 202 in comparative examples 1, 2 and examples 5, 6 were each about 13mm, and the diameters of the first nozzle 201 and the second nozzle 202 in example 7 were each about 15mm.

The difference between example 5 and example 6 is that: the first ejection center of the first nozzle 201 of example 5 coincides with the first ejection-zone center line P21, and the second ejection center of the second nozzle 202 coincides with the second ejection-zone center line P22; the first ejection center of the first nozzle 201 of example 6 coincides with the first ejection area center line P21, and the second nozzle 202 is located on the side of the second ejection area center line P121 remote from the first ejection area. Example 5 differs from example 7 only in the diameter of the first nozzle 201 and the second nozzle 202, example 5 being 13mm and example 7 being 15mm.

Fig. 16 shows Delta T temperature differential test results in packages of comparative example 2, comparative example 3, example 5, example 6, and example 7 of the present disclosure at location 2 (corresponding to the first injection zone). The packaging box and the testing instrument are the same as the previous examples, and are not repeated here, the temperature when the first nozzle 201 and the second nozzle 202 spray the hydrogen peroxide is 270 ℃, and the volume of the atomized hydrogen peroxide is 400 muL/s.

When spraying hydrogen peroxide, a certain temperature needs to be reached in the packaging box to prevent the condensation of atomized hydrogen peroxide, and the more uniform the spraying is, the lower the temperature difference in the packaging box is, so that the spraying effect can be indirectly reflected through the test on Delta T.

From fig. 10, the following conclusions can be drawn:

1) The lower Delta T of examples 5, 6 than comparative examples 2, 3 illustrates the better uniformity of the heat distribution within the package when neither the first nozzles 201 nor the second nozzles 202 are arranged in line, which indirectly illustrates the more uniform spraying of hydrogen peroxide within the package.

2) The arrangement of the first nozzle 201 and the second nozzle 202 in example 5 is more favorable for the uniformity of spraying the hydrogen peroxide;

3) When the diameter of the first nozzle 201 and the second nozzle 202 is about 13mm, the spray inside the package is more uniform.

As can be seen from the above test results, with the second spraying assembly 72, if the first and

second nozzles

201 and 202 are disposed on the same straight line along the moving direction V, the hydrogen peroxide sprayed from each nozzle is sprayed to the same position in the packing box 20, resulting in non-uniform spraying area and non-uniform heat distribution in the packing box. However, when the first and

second nozzles

201 and 202 are disposed not on the same line along the moving direction V, the spray area is increased and more uniform, and the sterilization effect is better.

The arrangement of the nozzles in the third spraying assembly provided by the embodiment of the present disclosure is described below by taking the two

nozzles

301 and 302 of the third spraying assembly 73 as the first nozzle and the second nozzle, respectively.

As shown in fig. 17, the first nozzle 301 corresponds to the first cartridge 311, and the second nozzle 302 corresponds to the second cartridge 322, such that the first nozzle 301 sprays the substance onto the packing boxes 20 in the first cartridge 311 first, and the second nozzle 302 sprays the substance onto the packing boxes 20 in the second cartridge 322 after the packing boxes 20 move in the moving direction V.

In the embodiment of the present disclosure, the cross-sectional size and the cross-sectional shape of the first nozzle 301 and the second nozzle 302 may be the same or different. In general, the packing boxes 20 for mass production have uniform dimensions, and it is preferable to set the sectional dimensions and the sectional shapes of the first nozzle 301 and the second nozzle 302 to be the same, because it is advantageous to improve the uniformity of the product quality, analyze the ejection effects of the first nozzle 301 and the second nozzle 302, and adjust the parameters such as the position according to the analysis result. The embodiment of the present disclosure is described taking as an example that the sectional size and the sectional shape of the first nozzle 301 and the second nozzle 302 are all the same as each other.

As shown in fig. 17, for example, third spraying assembly 73 further comprises at least two spraying zones, comprising a first spraying zone 331 arranged in correspondence with first nozzle 301 and a second spraying zone 322 arranged in correspondence with second nozzle 302, and package 20 is moved along movement direction V from first spraying zone 331 to second spraying zone 322. The first ejection area 331 is located in a forward projection area of the first cartridge 311 on the xy plane, and the second ejection area 322 is located in a forward projection area of the second cartridge 322 on the xy plane.

In the disclosed embodiment, the first injection zone 331 and the second injection zone 322 are adjustable regions of the first nozzle 301 and the second nozzle 302, respectively, e.g., when the position of the first nozzle 301 is adjusted within the xy-plane shown in fig. 17, the outer edge of the first nozzle 301 does not exceed the first injection zone 331; similarly, when the position of the second nozzle 302 is adjusted within the xy plane shown in fig. 17, the outer edge of the second nozzle 302 does not exceed the second ejection area 322. That is, the orthographic projection of the first nozzle 301 in the plane of the first injection zone 331 (i.e., the xy plane) falls within the first injection zone 331, and the orthographic projection of the second nozzle 302 in the plane of the second injection zone 322 (i.e., the xy plane) falls within the second injection zone 322.

In the embodiment of the present disclosure, by providing the first spraying area 331 and the second spraying area 322, the positions of the first nozzle 301 and the second nozzle 302 are easily adjusted, which is beneficial to prevent the respective sprays of the first nozzle 301 and the second nozzle 302 from being sprayed out of the packing box 20.

In the disclosed embodiment, the shape of the injection zone (e.g., first injection zone 331) is determined based on the cross-sectional shape of the sleeve (e.g., first sleeve 311) in the xy-plane, and the cross-sectional shape of the sleeve is determined based on the cross-sectional shape of the package 20. Preferably, the shape of the ejection area, the cross-sectional shape of the cartridge, and the shape of the ejection area are all the same as one another.

For example, the sectional shape of the packing box 20 is rectangular, and in order to ensure stability of the packing box 200 during transportation, the sectional shape of the first nest 311 and the shape of the first spouting area 331 are both rectangular. As shown in fig. 17, since the upper filling opening of the packing box 20 is pre-folded in the previous process, the hexagonal shape of the packing box 20 shown in fig. 17 is the sectional shape of the filling opening in the natural state, but the sectional shape of the bottom of the packing box 20 is still rectangular, and the sectional shape of the first sleeve 311 and the shape of the first spraying area 331 are also rectangular.

After sterilizing the package 20, a drying substance, such as hot and sterile drying air, is blown to the package 20 by means of the first and

second nozzles

301 and 302, thereby drying the package, allowing moisture and residual drying air to be removed from the package. The dried packages are passed to a filling zone, filled with, for example, a liquid product, and then closed in a sterile atmosphere to form the final product.

If the first nozzle 301 and the second nozzle 302 are disposed on the same straight line, for example, on the center line O5O6 of the first injection zone 331 and the second injection zone 322 shown in fig. 17: when the packing box 20 is located in the first spraying area 331, the drying air sprayed from the first nozzle 301 is sprayed toward the bottom surface of the packing box 20, and when the packing box moves from the first spraying area 331 to the second spraying area 322, the drying air sprayed from the second nozzle 302 is still sprayed toward the bottom surface of the packing box 20, and the drying air may not reach the side wall and the corner between the side walls, especially the upper side wall of the packing box, which may affect the removing effect.

As shown in fig. 17, in the embodiment of the present disclosure, the first nozzle 301 and the second nozzle 302 are disposed not on the same line, so that the drying air sprayed from the first nozzle 301 and the second nozzle 302 is directed to different positions in the packing box 20, thereby increasing the area of the drying region and enhancing the removing effect.

In the embodiment of the present disclosure, "straight line" in "the first nozzle 301 and the second nozzle 302 are disposed not on the same straight line" refers to any straight line parallel to the moving direction of the packing box 20. In some embodiments, as shown in FIG. 17, the line includes, but is not limited to, a line O5O6 connecting the centers of the injection zones, i.e., a line passing through the first center O5 of the first injection zone 331 and the second center O6 of the second injection zone 322.

In some embodiments, the first nozzle 301 and the second nozzle 302 are offset by a distance in the x-direction, as seen in the direction of movement V. That is, the first nozzle 301 and the second nozzle 302 do not overlap in the moving direction V. For example, the first nozzle 301 and the second nozzle 302 are offset from each other by a certain distance in the x direction, and do not overlap each other in the moving direction V. As another example, the first nozzle 301 and the second nozzle 302 are offset from each other by a distance in the x direction, and the two partially overlap in the moving direction V. The specific positional relationship between the first nozzle 301 and the second nozzle 302 can be referred to as shown in fig. 3 and 4, and will not be repeated here.

In the embodiment of the present disclosure, the first nozzle 301 and the second nozzle 302 are staggered by a certain distance in the x direction, so that it can be further ensured that the first nozzle 301 and the second nozzle 302 respectively spray dry air towards different positions of the packing box 20, thereby increasing the area of a dry area in the packing box and enhancing the removal effect.

As shown in fig. 17, the first nozzle 301 and the second nozzle 302 are located on opposite sides of the injection zone center line O5O6, respectively. For example, the ejection-zone center-line O5O6 includes a first side (e.g., a left side L31 shown in the drawing) and a second side (e.g., a right side R31 shown in the drawing) that are opposite to each other in the x direction. The first nozzle 301 is located on the left side L31, and the second nozzle 302 is located on the right side R31.

On the premise that the first nozzle 301 and the second nozzle 302 are not arranged on the same straight line, if the first nozzle 301 and the second nozzle 302 are arranged on a single side (for example, the left side L31 or the right side R31) of the ejection area center connecting line O5O6, it is equivalent that the packing box 20 is blown by the dry air only in the area near the left side wall or the right side wall thereof, and the opposite side wall is hardly blown, thus resulting in the drying area of the packing box 20 being not over-all or uneven.

In this embodiment, the first nozzle 301 and the second nozzle 302 are respectively disposed at the left and right sides of the central connecting line O5O6 of the spraying area, so that the dry air can be sprayed to the vicinity of the left and right side walls of the packing box 20, thereby increasing the area of the dry area and enhancing the removing effect.

The first nozzle 301 is located at the left side L31 and the second nozzle 302 is located at the right side R31 in the embodiment of the present disclosure, but it should be understood that the first nozzle 301 may be located at the right side R31 and the second nozzle 302 may be located at the left side L31 in other embodiments, which can also achieve the above-mentioned effects, and the embodiment of the present disclosure is not limited thereto.

It should be noted that, in the case of the first nozzle 301 or the second nozzle 302, when the nozzle is located on the left side or the right side of the injection zone center connecting line O5O6, the case where the nozzle intersects with the injection zone center connecting line O5O6 is included, and the case where the nozzle does not intersect with the injection zone center connecting line O5O6 is also included. In addition, the phrase "the nozzle intersects with the central connecting line O5O6 of the injection zone" includes both the nozzle intersects with the central connecting line O5O6 of the injection zone at one point (i.e. the nozzle is tangent to the central connecting line O5O6 of the injection zone) and the nozzle intersects with the central connecting line O5O6 of the injection zone at two points (for example, the case shown in fig. 5), which is not limited in this disclosure.

In some embodiments, neither the first nozzle 301 nor the second nozzle 302 intersects the injection zone center line O5O6 (as shown in fig. 17). In other embodiments, both the first nozzle 301 and the second nozzle 302 intersect the injection zone center line O5O6 (shown in fig. 5). In still other embodiments, one of the first nozzle 301 and the second nozzle 302 intersects the injection zone center line O5O6 and the other does not intersect the injection zone center line O5O 6.

It should be noted that, in the embodiment of the present disclosure, whether the first nozzle 301 or the second nozzle 302 is located on the left side L31 or the right side R31 of the ejection-area-center-connecting line O5O6 is determined by looking at the position of the ejection center of each nozzle relative to the ejection-area-center-connecting line O5O 6.

As shown in fig. 17, for example, the first nozzle 301 has a first ejection center 301O, the second nozzle 302 has a second ejection center 302O, and the first ejection center 301O and the second ejection center 302O are respectively located on the left side L31 and the right side R31 of the ejection zone center connecting line O5O6, and it is determined that the first nozzle 301 and the second nozzle 302 are respectively located on the left side L31 and the right side R31 of the ejection zone center connecting line O5O 6.

As shown in fig. 17, for example, the first injection center 301O has a first vertical distance D31 from the injection zone center connecting line O5O6, the second injection center 302O has a second vertical distance D32 from the injection zone center connecting line O5O6, and the first vertical distance D31 and the second vertical distance D32 may be equal or may not be equal. When the first vertical distance D31 is equal to the second vertical distance D32, the distance from the first nozzle 301 to the left sidewall of the packing box 20 is equal to the distance from the second nozzle 301 to the right sidewall of the packing box 20, so that the regions of the packing box 20 near both the left and right sidewalls can be sprayed with the drying air from the viewpoint of drying effect. In this embodiment, the first vertical distance D31 ranges from 5 to 20mm, and the second vertical distance D32 ranges from 5 to 20mm.

As shown in fig. 17, for example, the first injection region 331 has a first injection region center line P31 perpendicular to the injection region center line O5O6, and the second injection region 322 has a second injection region center line P32 perpendicular to the injection region center line O5O 6. The first nozzle 301 is located on a side of the first spray zone center line P31 away from the second spray zone 322, and the second nozzle 302 is located on a side of the second spray zone center line P32 away from the first spray zone 331.

For example, the first ejection region center line P31 includes a first side (e.g., an upper side UP31 shown in the drawing) and a second side (e.g., a lower side DP31 shown in the drawing) opposite to each other in the y direction (i.e., the moving direction V) in which the upper side UP31 is close to the second ejection region 322 and the lower side DP31 is away from the second ejection region 322. The second ejection area center line P32 includes a first side (e.g., an upper side UP32 shown in the drawing) and a second side (e.g., a lower side DP32 shown in the drawing) opposite to each other in the y direction (i.e., the moving direction V) in which the lower side DP32 is close to the first ejection area 331 and the upper side UP32 is away from the first ejection area 331. In the present embodiment, the first nozzle 301 is located on the lower side DP31 of the first spray zone center line P31, and the second nozzle 302 is located on the upper side UP32 of the second spray zone center line P32.

If the first nozzle 301 is disposed at the lower side DP31 of the first spraying section center line P31 and the second nozzle 302 is disposed at the lower side DP32 of the second spraying section center line P32, the area near the upper sidewall in the packing box 20 is hardly directly sprayed with the dry air. Likewise, if the first nozzle 301 is disposed at the upper side UP31 of the first spray zone center line P31 and the second nozzle 302 is disposed at the upper side UP32 of the second spray zone center line P32, the area near the lower sidewall inside the packing box 20 is hardly directly sprayed with the dry air.

In the present embodiment, by disposing the first nozzle 301 at the lower side DP31 of the first spray zone center line P31 and disposing the second nozzle 302 at the upper side UP32 of the second spray zone center line P32, it is possible to spray the drying air to the vicinity of the upper and lower sidewalls of the packing box 20, thereby increasing the area of the drying region and enhancing the drying effect.

The embodiment of the present disclosure is described by taking the example that the first nozzle 301 is located at the lower side DP31 of the first spraying region center line P31 and the second nozzle 302 is located at the upper side UP32 of the second spraying region center line P32, and it is understood that in other embodiments, the first nozzle 301 may be located at the side of the first spraying region center line P31 close to the second spraying region 322 and the second nozzle 302 may be located at the side of the second spraying region center line P32 close to the first spraying region 331, and the above-mentioned effects can be achieved. In some embodiments, the first nozzle 301 is located at an upper side UP32 of the first spray zone center line P31 and the second nozzle 302 is located at a lower side DP31 of the second spray zone center line P32, and also the drying air can be sprayed to the vicinity of the upper and lower sidewalls of the packing box 20, thereby increasing the area of the drying region and enhancing the drying effect.

It should be noted that, in both the first nozzle 301 and the second nozzle 302, when the nozzles are located on the upper side or the lower side of the transverse center line (including the first spray zone center line P31 and the second spray zone center line P32), the case where the nozzles intersect with the transverse center line is included, and the case where the nozzles do not intersect with the transverse center line is also included. In addition, "the nozzle intersects the transverse centerline" includes both the nozzle intersecting the transverse centerline at one point (i.e., both tangent lines) and the nozzle intersecting the transverse centerline at two points (e.g., as shown in fig. 5), which is not limited by the embodiments of the present disclosure.

In some embodiments, the first nozzle 301 does not intersect the first injection zone centerline P31 and the second nozzle 302 does not intersect the second injection zone centerline P32 (as shown in fig. 17). In other embodiments, the first nozzle 301 intersects the first injection zone centerline P31 and the second nozzle 302 intersects the second injection zone centerline P32 (see fig. 6). In still other embodiments, one of the first nozzle 301 and the second nozzle 302 intersects the injection zone center line O5O6, and the other does not intersect the injection zone center line O5O 6.

In the embodiment of the present disclosure, whether the nozzle is located above or below the lateral centerline is determined by looking at the position of the ejection center of the nozzle with respect to the lateral centerline.

As shown in fig. 17, for example, the first ejection center 301O is located on the lower side DP31 of the first ejection-zone center line P31, and it is determined that the first nozzle 301 is located on the lower side DP31 of the first ejection-zone center line; similarly, the second injection center 302O is located on the upper side UP32 of the second injection zone centerline P32, and it is determined that the second nozzle 302 is located on the upper side UP32 of the second injection zone centerline P32.

As shown in fig. 17, for example, the first injection center 301O has a third perpendicular distance D33 from the first injection zone center line P31, the second injection center 302O has a fourth perpendicular distance D34 from the second injection zone center line P32, and the third perpendicular distance D33 and the fourth perpendicular distance D34 may be equal or may not be equal.

As shown in fig. 17, the conveying belt 602 functions to carry the sleeve 601 to convey the packing boxes 20 to below the first nozzle 301 and the second nozzle 302 in sequence. When the conveyor belt 602 is used for a long period of time, slack occurs. If the conveyor 602 is loose, the position of the sleeve 601 with respect to the nozzles, i.e., the position of the packages 20 with respect to the nozzles, changes.

In some embodiments, to avoid the influence of the slack of the conveyor belt 602 on the sterilization effect, the fourth vertical distance D34 and the third vertical distance D33 are set to be unequal. For example, the fourth vertical distance D34 is set to be smaller than the third vertical distance D33 to bring the second nozzle 302 located downstream of the conveyor belt 602 closer to the first ejection area center line P32, so that even if the conveyor belt 602 slacks in the y direction, the slacked second nozzle 302 is ensured to be located in the second ejection area 322.

In this embodiment, the third vertical distance D33 is set to a range of 0 to 20mm, and the fourth vertical distance D34 is set to a range of 0 to 20mm. Considering that the maximum slack length of the conveyor belt 602 during sterilization is 3.8mm, the value range of the third vertical distance D33 is set to 0, and the value range of the fourth vertical distance D34 is set to 0; at this time, the shortest distance from the nozzle 301 to the inner wall of the packing box in the moving direction V is about 19mm, and the shortest distance from the nozzle 202 to the inner wall of the packing box is about 16mm.

Fig. 17 shows a case where the first injection center 301O does not coincide with the first injection zone center line P31 and the second injection center 302O does not coincide with the second injection zone center line P32, however, in other embodiments of the present disclosure, it may be arranged in the following manner: first injection center 301O coincides with first injection zone centerline P31 and/or second injection center 302O coincides with second injection zone centerline P32.

In some embodiments, first jet center 301O coincides with first jet zone centerline P31 and second jet center 302O coincides with second jet zone centerline P32 (shown with reference to fig. 7). In other embodiments, first jet center 301O coincides with first jet zone centerline P31 and second jet center 302O does not coincide with second jet zone centerline P32; in still other embodiments, first jet center 301O is not coincident with first jet zone centerline P31 and second jet center 302O is coincident with second jet zone centerline P32.

With the third spraying unit 73, if the first nozzle 301 and the second nozzle 302 are disposed on the same straight line along the moving direction V, the drying gas sprayed from each nozzle is sprayed to the same position in the packing box 20, resulting in non-uniform drying area and non-ideal removal effect. However, when the first nozzle 301 and the second nozzle 302 are disposed not on the same line in the moving direction V, the area of the drying region is increased and the removing effect is better.

In the embodiment of the present disclosure, the number of nozzles (i.e., injectors) in the first injection assembly 71, the second injection assembly 72, and the third injection assembly 73 may be the same or different, as long as the number of nozzles in each injection assembly is greater than or equal to two, which is not limited in the embodiment of the present disclosure.

In the embodiment of the present disclosure, the arrangement of the plurality of nozzles in the first spraying assembly 71 including the second spraying assembly 72 and the third spraying assembly 73 may be the same or different, as long as the plurality of nozzles in each spraying assembly are not disposed on the same straight line along the moving direction of the packing box, which is not limited in the embodiment of the present disclosure.

In the disclosed embodiment, the pretreatment device 700 may include at least one of the first spray assembly 71, the second spray assembly 72, and the third spray assembly 73, for example, the pretreatment device 700 may include one, two, or three of the first spray assembly 71, the second spray assembly 72, and the third spray assembly 73, which is not limited by the disclosed embodiment.

In some embodiments, when the pretreatment device 700 includes the first spray assembly 71, the second spray assembly 72, and the third spray assembly 73, the plurality of

nozzles

101, 102, 201, 202, 301, 302 are disposed not on the same line.

FIG. 18 is a top view of a plurality of nozzles of the first, second, and third jetting assemblies of an embodiment of the present disclosure. In the direction of movement V of the packs, the second spraying assembly 72 is located downstream of the first spraying assembly 71, and the third spraying assembly 73 is located downstream of the second spraying assembly 72.

As shown in fig. 18, the first and

second nozzles

101 and 102 of the first spray assembly 71 for preheating are arranged differently from the first and

second nozzles

201 and 202 of the second spray assembly 72 for sterilization; also, the arrangement of the first and

second nozzles

301 and 302 of the third spray assembly 73 for drying is also different from the arrangement of the first and

second nozzles

101 and 102 or the arrangement of the first and

second nozzles

201 and 202. In the present disclosure, "arrangement" refers to the relative position of the plurality of nozzles with respect to the cartridge, including but not limited to the vertical distance from the center of the spray to the spray area, or the vertical distance from the nozzles to the cartridge, etc.

For example,

multiple cartridges

111, 112, 211, 212, 311, 312 are arranged along a common centerline OO formed by the center-to-center line of the injection zones (i.e., O1O2, O3O4, or O5O6 as described in the previous embodiments) of each of the injection assemblies. The plurality of

nozzles

101, 102, 201, 202, 301, 302 are arranged in an alternating manner with respect to the center line OO.

For example, the center line OO includes a first side (e.g., a left side as viewed in the drawing) and a second side (e.g., a right side as viewed in the drawing) opposite to each other in the direction perpendicular to the moving direction V, wherein the ejection centers of the

nozzles

101, 201, 301 are all located on the left side of the straight line OO, and the ejection centers of the

nozzles

102, 202, 302 are all located on the right side of the straight line OO. By arranging the plurality of

nozzles

101, 102, 201, 202, 301, 302 in an alternating manner with respect to the centerline OO, the packages may be sprayed more evenly under each spray assembly and may remain relatively smooth while being sprayed.

For example, the distance f1=13mm, f2=18.2mm between the nozzle 101 and the cartridge, the distance f3=13mm, f4=18.2mm between the nozzle 102 and the cartridge. The distance f5=10mm, f6=13.8mm between the nozzle 201 and the cartridge, and the distance f7=10mm, f8=16.7mm between the nozzle 202 and the cartridge. The distance f9=10mm, f10=16.2mm between the nozzle 301 and the cartridge, and the distance f11=10mm, f12=12.4mm between the nozzle 302 and the cartridge. The

nozzles

101, 102, 201, 202, 301, 302 are the same size, all 13mm.

In the disclosed embodiment, the area of the sparging area (e.g., sparging

areas

121, 122, 221, 222, 321, 333) is less than or equal to the cross-sectional area of package 20. When the area of the spouting zone is smaller than the sectional area of the packing box 20, it is possible to further prevent the spouting material from the nozzle from spouting out of the packing box, and thus it is preferable. For example, package 20 includes a bottom surface having a first area and an orthographic projection of the nozzle in a plane of the bottom surface having a second area, the first area being 12-35 times the second area. For example, the first area has a value ranging from 2000 to 5000mm ² The value range of the second area is 70-300 mm ² Preferably 110 to 180mm ² 。

In at least some embodiments, the pretreatment device further comprises: a vacant assembly disposed between the second jetting assembly and the third jetting assembly, the vacant assembly including a nozzle configured to not jet any of the propellant into the package 20.

Fig. 19 is a schematic structural view of a packaging apparatus according to another embodiment of the present disclosure. Fig. 19 differs from fig. 1 in that the pretreatment device 700 of the packaging apparatus in fig. 19 further includes an idle module 74 disposed between the second spray module 72 and the third spray module 73, and accordingly, the pretreatment region T700 further includes an idle region T74 corresponding to the idle module 74. The empty assembly 74 includes a nozzle 401, the nozzle 401 being configured to not spray any spray into the package 20.

When the package 20 is preheated by the first spraying unit 71 and sterilized by the second spraying unit 72, hydrogen peroxide is left in the package, and when the package 20 enters the vacant region T74, the hydrogen peroxide can be temporarily left to react sufficiently, which is beneficial to enhancing the sterilization effect, and then the package is dried in the drying region.

The embodiment of the present disclosure further provides a preprocessing method of a preprocessing apparatus, including:

s100: moving the package so that the package passes sequentially through a plurality of sprayers;

s200: and spraying the spray into the package, wherein the plurality of sprayers are arranged not to be in the same line along the moving direction of the package.

In the pretreatment method provided by the embodiment of the disclosure, when the package sequentially moves to a plurality of sprayers along the moving direction, because the positions of the sprayers in the spraying assembly are set to be different on the same straight line, the same part in the package can be prevented from being sprayed for many times, so that the spraying uniformity is improved, and the pretreatment effect is improved.

In at least some embodiments, the pretreatment device is the pretreatment device 700 described in any of the previous embodiments, including, for example, the first spray assembly 71, the second spray assembly 72, and the third spray assembly 73.

For example, referring to fig. 1 to 9 and fig. 18, a pretreatment method of a pretreatment apparatus 700 provided in an embodiment of the present disclosure includes:

s101: moving the packing box 20 so that the packing box 20 passes through the first nozzle 101 and the second nozzle 102 of the first spray assembly 71 in sequence;

s201: the preheated air is injected into the package 20, wherein the first nozzle 101 and the second nozzle 102 are arranged not on the same line in the moving direction V of the package 20.

By adopting the preheating method, the uniformity of heat distribution in the packaging box can be improved, and the preheating effect is improved.

For another example, referring to fig. 1, 13 to 15, and 18, a pretreatment method of a pretreatment apparatus 700 provided in an embodiment of the present disclosure includes:

s102: moving the packing box 20 so that the packing box 20 passes through the first nozzle 201 and the second nozzle 202 of the second spray assembly 72 in sequence;

s202: the hydrogen peroxide is sprayed into the packing box 20, wherein the first nozzle 201 and the second nozzle 202 are arranged not on the same line in the moving direction V of the packing box 20.

By adopting the sterilization method, the distribution uniformity of the disinfectant in the packaging box can be improved, and the sterilization effect is improved.

For another example, referring to fig. 1, 17 to 18, a pretreatment method of a pretreatment apparatus 700 provided in an embodiment of the present disclosure includes:

s103: moving the packing box 20 such that the packing box 20 passes through the first nozzle 301 and the second nozzle 302 of the third spray assembly 73 in sequence;

s203: the drying air is injected into the packing box 20, wherein the first nozzle 301 and the second nozzle 302 are disposed not on the same line along the moving direction V of the packing box 20.

By adopting the drying method, the uniformity of the distribution of the drying air in the packaging box can be improved, and the drying effect is improved.

In at least some embodiments, referring to fig. 18, the preprocessing method described above includes: the package 20 is moved such that the package 20 passes through the first spraying assembly 71, the second spraying assembly 72, and the third spraying assembly 73 in sequence, the first spraying assembly 71, the second spraying assembly 72, and the third spraying assembly 73 being configured to spray different sprays, respectively, onto the package 20. By adopting the pretreatment method, the preheating, sterilizing and drying effects of the packaging box 20 can be improved, and the product quality can be improved.

Herein, the following points need to be noted:

(1) The drawings of the embodiments of the disclosure only relate to the structures related to the embodiments of the disclosure, and other structures can refer to the common design.

(2) Without conflict, embodiments of the present disclosure and features of the embodiments may be combined with each other to arrive at new embodiments.

The above description is intended to be exemplary of the present disclosure, and not to limit the scope of the present disclosure, which is defined by the claims appended hereto.

Claims

1. A pre-treatment apparatus of a packaging device configured to fill contents in a package, the pre-treatment apparatus configured to: pre-treating the package before the contents are filled, the pre-treating device comprising:

an injection assembly configured to inject an injectate into the package and comprising a plurality of injectors, the package configured to move relative to the plurality of injectors;

wherein the plurality of sprayers are arranged not to be in the same line along the moving direction of the package.

2. The pretreatment apparatus of claim 1, wherein:

the plurality of injectors includes at least two injectors including a first injector and a second injector;

the spray assembly further comprises at least two spray zones, the at least two spray zones comprising a first spray zone disposed in correspondence with the first sprayer and a second spray zone disposed in correspondence with the second sprayer, the package configured to move from the first spray zone to the second spray zone along the movement direction;

wherein a straight line passing through a first center of the first spray zone and a second center of the second spray zone is defined as a spray zone center line, the spray zone center line being parallel to the moving direction of the packages; the first ejector and the second ejector are respectively positioned on two opposite sides of a central connecting line of the injection area.

3. The pretreatment apparatus of claim 2, wherein:

the first ejector is provided with a first ejection center, the second ejector is provided with a second ejection center, and the first ejection center and the second ejection center are respectively positioned on two opposite sides of a central connecting line of the ejection areas.

4. The pretreatment apparatus according to claim 3,

wherein at least one of the first injection zone and the second injection zone intersects the injection zone centerline; or the first injection area and the second injection area are not intersected with the central connecting line of the injection areas.

5. The preprocessing apparatus of claim 3, wherein:

the first injection center has a first vertical distance to the injection zone center line;

the second injection center has a second vertical distance to the injection zone center line;

wherein the first vertical distance is equal to the second vertical distance.

6. The pretreatment device according to claim 2,

the first injector having a first injection center and the second injector having a second injection center;

the first injection zone is provided with a first injection zone central line which is vertical to the central connecting line of the injection zones;

the second spraying area is provided with a second spraying area central line which is vertical to the central connecting line of the spraying areas;

wherein the first injection center is not coincident with the first injection zone centerline and the second injection center is not coincident with the second injection zone centerline.

7. The pre-processing apparatus according to claim 6,

wherein the first injector is positioned on one side of the centerline of the first injection zone away from the second injection zone, and the second injector is positioned on one side of the centerline of the second injection zone away from the first injection zone; alternatively, the first and second electrodes may be,

the first injector is positioned on one side of the center line of the first injection zone close to the second injection zone, and the second injector is positioned on one side of the center line of the second injection zone close to the first injection zone.

8. The pretreatment device according to claim 7,

the first injection center has a third perpendicular distance to the first injection zone centerline;

the second injection center has a fourth perpendicular distance to the second injection zone centerline;

wherein the fourth vertical distance is not equal to the third vertical distance.

9. The pretreatment apparatus according to claim 2,

the first spraying area is provided with a first spraying area central line which is vertical to the central connecting line of the spraying areas;

wherein the first injection center coincides with the first injection zone centerline and/or the second injection center coincides with the second injection zone centerline.

10. The pretreatment apparatus according to claim 2,

the orthographic projection of the first ejector in the plane of the first ejection area falls into the first ejection area;

the orthographic projection of the second ejector in the plane of the second ejection area falls into the second ejection area.

11. The pretreatment apparatus of claim 1, wherein the pretreatment apparatus comprises a plurality of spray assemblies arranged in sequence along a moving direction of the packages to spray different sprays into the packages.

12. The pretreatment device of claim 11, wherein the plurality of spray assemblies comprises:

a first spray assembly configured to spray a first spray onto the package;

a second spray assembly configured to spray a second spray onto the package;

wherein the first spray assembly is located upstream of the second spray assembly in the direction of movement of the packages, the first spray comprising a pre-heating substance and the second spray comprising a sterilizing substance.

13. The pretreatment apparatus of claim 12, wherein the plurality of spray assemblies further comprise:

a third spray assembly configured to spray a third spray onto the package;

wherein the third jetting assembly is located downstream of the second jetting assembly in a direction of movement of the packages, the third jet comprising a dry substance.

14. The preprocessing apparatus of claim 13, wherein the preprocessing apparatus further comprises:

a dummy assembly disposed between the second jetting assembly and the third jetting assembly,

wherein the empty assembly comprises an empty sprayer configured to not spray a spray into the package.

15. The pretreatment apparatus of claim 13,

the first injection assembly includes a first plurality of injectors, the second injection assembly includes a second plurality of injectors, and the third injection assembly includes a third plurality of injectors, the first, second, and third plurality of injectors arranged to be not collinear.

16. The pretreatment apparatus of claim 13,

the arrangement of the plurality of injectors of the first injection assembly is different from the arrangement of the plurality of injectors of the second injection assembly.

17. The pre-processing apparatus of claim 1, wherein:

the package includes a bottom surface having a first area;

the orthographic projection of the ejector in the plane of the bottom surface is provided with a second area;

wherein the first area is 12 to 35 times the second area.

18. The pretreatment device of claim 17, wherein the injector comprises a nozzle having a diameter of 12 to 15mm.

19. A packaging apparatus comprising a pretreatment device according to any one of claims 1 to 18.

20. The packaging apparatus of claim 19, wherein the packaging apparatus further comprises:

a conveying device including a plurality of containing units for containing the packages, the conveying device being configured to convey the packages sequentially in a conveying direction thereof to the plurality of ejectors.

21. A pretreatment method for the pretreatment device according to any one of claims 1 to 18, comprising:

moving the package so that the package passes the plurality of sprayers in sequence;

spraying a spray into the package;

22. The pretreatment method of claim 21, wherein the pretreatment device comprises a plurality of spray assemblies;

the pretreatment method comprises the following steps: moving the package such that the package passes sequentially through the plurality of jetting assemblies configured to jet different jets into the package.