vacuum sealing machine

Abstract

Household vacuum sealing machine comprising a lower seat body (1) and a hinged cover (2), wherein the rear of the hinged cover (2) is rotatably installed on the upper part of the lower seat body (1), and wherein a circuit control board (3) and an evacuation pump (4) are installed in the inner cavity of the lower seat body (1) or the hinged cover (2), and wherein the circuit control board (3) is electrically connected to the evacuation pump (4), and wherein a locking hook (21) is arranged on the left and right sides of the lower surface of the hinged cover (2), and wherein a locking position (11) is provided on the left and right sides of the upper surface of the lower seat body (1), into which the locking hook (21) is inserted on the corresponding side to ensure that the hinged cover (2) is locked onto the upper part of the lower seat body (1) during evacuation, characterized in thatthat the front part of the upper surface of the lower seat body (1) is arranged as an inclined evacuation section (10) with a low front and a high rear, and the rear part as a bag feed section, the bag feed section being provided with a bag feed cavity (12) for receiving rolled-up bags, and wherein a bag cutting table (13) is provided at the front of the bag feed cavity (12), extending forward to the evacuation section (10), and wherein the left and right sides of the evacuation section (10) extend to the left and right locking positions (11), respectively; and wherein an evacuation fitting section (20) is arranged on the lower surface of the hinged cover (2), and wherein an upper sealing ring (24) is attached to the lower surface of the hinged cover (2), surrounding the outer edge of the evacuation fitting section (20) for one revolution,and wherein an elastic pressure strip (23) and an evacuation hole (22) are provided in the inner region of the evacuation fitting section (20), and wherein the outer end section of the evacuation hole (22) is connected to the evacuation pump (4) by an air tube, and wherein the inner end section of the evacuation hole (22) is flush with the lower surface of the hinged cover (2); and wherein a lower sealing ring (14) is attached to the upper surface of the lower seat body (1), which surrounds the outer edge of the evacuation section (10) for one full rotation, and wherein the inner region of the evacuation section (10) is provided, from front to back, with a lower liquid storage slot (15) through which the bag body of the vacuum packaging bag (5) can pass inclined upwards, a bag opening heating component (16), and an upper liquid dispensing slot (17) for inserting the bag opening of the vacuum packaging bag (5),and wherein the lower liquid storage slot (15), the bag opening heating component (16) and the upper liquid dispensing slot (17) are each inclined relative to the horizontal plane, and wherein along the inclination direction of the evacuation section (10) the width of the lower liquid storage slot (15) is 0.4-0.6 times the total width of the evacuation section (10); and wherein the tip of the bag opening heating component (16) projects beyond the upper surface of the evacuation section (10), and wherein the bottom of the elastic pressure strip (23) presses against the tip of the bag opening heating component (16) after the hinged cover (2) has been locked onto the lower seat body (1); and wherein the upper sealing ring (24) presses against the lower sealing ring (14) after the hinged cover (2) has been locked onto the lower seat body (1),and wherein the space between the evacuation section (10) and the evacuation fitting section (20) is closed to form an isobaric evacuation space with equal pressure during evacuation, and wherein the internal pressure of the bag body of the vacuum packaging bag (5) held in the isobaric evacuation space is equal to the pressure of the isobaric evacuation space.

Description

TECHNICAL FIELD

[0001] The present invention relates to the technical field of vacuum sealing machine, in particular a household vacuum sealing machine. STATE OF THE ART

[0002] When a household vacuum sealing machine evacuates a vacuum bag with liquid inside the bag, the liquid inside the bag moves towards the bag opening due to the pressure difference between the inside and outside of the bag and flows into the evacuation tank of the household vacuum sealing machine. At present, the main solution is to arrange a detection element inside the evacuation tank and control the household vacuum sealing machine to stop the evacuation when the liquid in the evacuation tank is detected. However, in order to achieve a better preservation effect, the household vacuum sealing machine must exhaust as much air as possible from the inside of the vacuum bag. This results in the liquid inside the bag definitely moving towards the bag opening and overflowing from the bag opening during the final stage of vacuuming.therefore there is a need to make an improvement., CONTENT OF THE PRESENT INVENTION

[0003] In view of the deficiencies of the prior art, an object of the present invention is to provide a household vacuum sealing machine capable of evacuating a vacuum packaging bag having liquid inside the bag and preventing the liquid inside the bag from overflowing from the bag opening.

[0004] To achieve the above object, the present invention uses the following technical solution: a household vacuum sealing machine comprising a lower seat body and a flip cover, wherein the back of the flip cover is rotatably installed on the upper part of the lower seat body, and wherein a circuit control board and an evacuation pump are installed in the inner cavity of the lower seat body or the flip cover, and wherein the circuit control board is electrically connected to the evacuation pump, and wherein a locking hook is arranged on the left and right sides of the lower surface of the flip cover, and wherein a locking position is provided on the left and right sides of the upper surface of the lower seat body, into which the locking hook is inserted on the corresponding side, to realizethat during evacuation the folding cover on the upper part of the lower seat body is locked.

[0005] The front part of the upper surface of the lower seat body is arranged as an inclined evacuation section having a low front and a high rear, and the rear part as a bag supply section, wherein the bag supply section is provided with a bag supply cavity for receiving rolled-up bags, and wherein a bag cutting table is provided at the front of the bag supply cavity and extends forward to the evacuation section, and wherein the left and right sides of the evacuation section extend to the left and right locking positions, respectively; and wherein an evacuation fitting portion is arranged on the lower surface of the flip cover, and wherein an upper sealing ring is attached to the lower surface of the flip cover, surrounding the outer edge of the evacuation fitting portion for one round, and wherein an elastic pressure strip and an evacuation hole are provided in the inner region of the evacuation fitting portion, and wherein the outer end portion of the evacuation hole is connected to the evacuation pump through an air pipe, and wherein the inner end portion of the evacuation hole is flush with the lower surface of the flip cover; and wherein a lower sealing ring is attached to the upper surface of the lower seat body, which seal surrounds the outer edge of the evacuation section for one round, and wherein the inner region of the evacuation section is provided from front to rear with a lower liquid storage slot through which the bag body of the vacuum packaging bag can pass inclined upwards, a bag opening heating component and an upper liquid discharge slot for inserting the bag opening of the vacuum packaging bag, and wherein the lower liquid storage slot, the bag opening heating component and the upper liquid discharge slot are each arranged inclined relative to the horizontal plane, and wherein along the inclination direction of the evacuation section, the width of the lower liquid storage slot is 0.4-0.6 times the total width of the evacuation section; and wherein the tip of the bag opening heating component protrudes above the upper surface of the evacuation section, and wherein the bottom of the elastic pressure strip presses against the tip of the bag opening heating component after the flip cover is locked onto the lower seat body; and wherein the upper sealing ring presses against the lower sealing ring after the flip cover is locked onto the lower seat body, and wherein the space between the evacuation portion and the evacuation fitting portion is closed to form an isobaric evacuation space having equal pressure during evacuation, and wherein the internal pressure of the bag body of the vacuum packaging bag held in the isobaric evacuation space is equal to the pressure of the isobaric evacuation space.

[0006] Preferably, the evacuation section has a first inclination angle α relative to the horizontal plane, so that the crimping surfaces of the upper sealing ring and the lower sealing ring have a first inclination angle α relative to the horizontal plane, wherein the first inclination angle α is 25-30 degrees and the highest point of the tip of the bag opening heating component projects upwards above the crimping surfaces by 0.5-1 cm to prevent the liquid inside the vacuum packaging bag from running through the bag opening heating component, and wherein the total length H of the bag body of the vacuum packaging bag held in the isobaric evacuation space is increased to 8-15 cm, and wherein a guide ramp with a low front and a high back is arranged at the rear part of the lower liquid storage slot, and wherein the upper surface of the rear part of the guide ramp is flush with the upper surface of the bag opening heating component.

[0007] Compared with the prior art, the present invention has the following advantages: the household vacuum sealing machine of the present invention has a small volume and a simple structure, and is capable of evacuating a vacuum packaging bag in which there is liquid inside the bag and preventing the liquid inside the bag from overflowing from the bag opening.

[0008] The present invention ensures that the internal pressure of the bag body of the vacuum packaging bag held in the isobaric evacuation space is equal to the pressure of the isobaric evacuation space, so that it is difficult for the liquid inside the bag to flow toward the bag opening, and the liquid inside the bag cannot overflow through the bag opening into the upper liquid discharge slot, so as to prevent the liquid from contaminating the air pipe, the evacuation pump and the internal parts of the sealing machine, and at the same time to avoid the fire accident caused by the contact of the liquid with the circuit control board, thereby improving safety.

[0009] Since the evacuation hole is located on the lower surface of the flip cover and is at the highest point of the isobaric evacuation space, if the liquid accidentally overflows from the bag opening, the liquid cannot enter the evacuation hole because there are both an upper liquid discharge slot and a lower large-volume liquid storage chamber. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 shows a schematic diagram of the structure of a household vacuum sealing machine of the present invention. Fig. Figure 2 shows a schematic diagram of the structure of the present invention after the flip cover has been unfolded. Fig. 3 shows a schematic diagram of the structure after the portal knife holder has been unfolded. Fig. Figure 4 shows a partial enlarged view of location A according to Fig. 3. Fig. Figure 5 shows a side view of the present invention. Fig. 6 shows a sectional view of the present invention. Fig. Figure 7 shows a partial sectional view of the present invention. List of reference symbols 1 Lower seat body 10 Evacuation section 11 Locking position 12 Bag feed cavity 13 Bag cutting table 131 purse-cutting groove 14 Lower sealing ring 15 Lower liquid storage slot 16 Bag opening heating component 161 metal heating blade 162 Insulating seat 17 Upper liquid discharge slot 18 portal knife holders 181 bag press holder 182 sliding button 183 sliding slot 184 hook shooters 185 cutting blades 186 sliding block 187 Rotation arm 19 Clamping plate 2 folding covers 20 Evacuation fitting section 21 locking hooks 211 Non-slip rubber block 22 Evacuation hole 23 Elastic pressure strip 24 Upper sealing ring 25 Upper Chamber 26 Bag pressing section 27 Handle 28 Rotating shaft 29 Locking sleeve 291 Positioning section 292 locking windows 293 Recording Room 294 Pump-out inlet hole 295 channel 296 Evacuation interface 297 Pump-out interface 298 Guide ramp 3 Circuit control board 4 Evacuation pump 5 vacuum packaging bags 6 locking hole 7 Drainage hole 8 deflection plate 9 printing plate DETAILED DESCRIPTION

[0010] A household vacuum sealing machine, as in Fig. 1 to 7, comprising a lower seat body 1 and a folding cover 2, wherein the back of the folding cover 2 is rotatably installed on the upper part of the lower seat body 1, and wherein a circuit control board 3 and an evacuation pump 4 are installed in the inner cavity of the lower seat body 1, or wherein the circuit control board 3 and the evacuation pump 4 are installed in the inner cavity of the lower seat body 1, and wherein the circuit control board 3 is provided with a control circuit for controlling the operation of the household vacuum sealing machine, and wherein the circuit control board 3 is electrically connected to the evacuation pump 4, and wherein a locking hook 21 is arranged on the left and right sides of the lower surface of the folding cover 2, and wherein a locking position 11 is provided on the left and right sides of the upper surface of the lower seat body 1,into which the locking hook 21 is inserted on the corresponding side in order to realize that during evacuation the folding cover 2 is locked on the upper part of the lower seat body 1.

[0011] The X-axis of the present invention refers to the X-axis of the Fig. 1, and the "left-right" and "horizontal" directions of the present invention are along the X-axis, and the perpendicular direction and the vertical direction are along the Z-axis, and the present invention sets the side of the household vacuum sealer facing the user as the front side, for example, the side on which the handle 27 is located is set as the front side.

[0012] On the upper surface of the flip cover 2, a handle 27 is rotatably installed, which protrudes from the front of the flip cover 2 to form a labor-saving lever, wherein a rotary shaft 28 is rotatably mounted in the inner cavity of the flip cover 2, and wherein the rear side of the handle 27 is fixed to the central part of the rotary shaft 28, and wherein the left and right sides of the rotary shaft 28 extend to the left and right locking hooks 21, respectively, and wherein the rear end portions of the two locking hooks 21 are respectively installed on the rotary shaft 28, as shown in Fig. As shown in Figure 7, a locking sleeve 29 is formed integrally on the left and right sides of the lower surface of the folding cover 2, wherein a positioning portion 291 is formed integrally on the inside of each of the two locking sleeves 29, and wherein the height of the front side of the positioning portion 291 is smaller than that of its rear side, and wherein an arcuate corner is provided on the front and rear sides of the positioning portion 291; the locking position 11 is a functional chamber formed integrally on the lower seat body 1, wherein a main chamber for the free arrangement of the locking sleeve 29 is provided on the outside of the locking position 11, and wherein a sub-chamber is provided on the inside of the locking position 11, the shape of which is adapted to the positioning portion 291, and wherein the positioning portion 291 is pressed against the sub-chamber.After the locking sleeve 29 is pushed into the locking position 11; a locking window 292 is provided in front of the locking sleeve 29, and a locking hook 21 is rotatably installed in the locking sleeve 29. Since the handle 27 adopts a labor-saving lever structure, the rotating shaft 28 can be easily driven to rotate by pressing the handle 27 downward. The rotating shaft 28 drives the locking hook 21 to rotate synchronously, so that the front end portion of the locking hook 21 protrudes from the locking window 292. A C-shaped hook body is arranged on the outer end portion of the locking hook 21. Two non-slip rubber blocks 211 are arranged at a distance from each other on the outer side surface of the hook body. A locking hole 6 is provided on the front side surface of the main chamber after the locking hook 21 is rotated.The hook body of the locking hook 21 is rotatably inserted into the locking hole 6 of the corresponding side. The non-slip rubber blocks 211 of the hook body engage tightly with the lower surface of the main chamber to prevent the locking hook 21 from moving backward and the hinged cover 2 from loosening during the evacuation process. After the handle 27 is pulled upward, the rotating shaft 28 can be slightly rotated in the opposite direction by the handle 27, thereby rotating the locking hook 21 in the opposite direction, and the hook body finally exits the locking hole 6, thus realizing labor-saving locking of the lid and labor-saving opening of the lid by the handle 27. A drainage hole 7 is provided at the bottom of the locking position 11, so that the liquid is automatically drained from the drainage hole 7.after the liquid has accidentally flowed into the locking position 11.

[0013] The front part of the upper surface of the lower seat body 1 is arranged as an inclined evacuation section 10 having a low front and a high back, and the rear part as a bag feeding section, wherein the bag feeding section is provided with a bag feeding cavity 12 for receiving rolled-up bags, and wherein a bag cutting table 13 is provided at the front of the bag feeding cavity 12 and extends forward to the evacuation section 10, and wherein the left and right sides of the evacuation section 10 extend to the left and right locking positions 11, respectively.

[0014] An evacuation fitting portion 20 is arranged on the lower surface of the flip cover 2. An upper sealing ring 24 is fixed to the lower surface of the flip cover 2, surrounding the outer edge of the evacuation fitting portion 20 for one round. In the inner region of the evacuation fitting portion 20, an elastic pressure strip 23, an evacuation hole 22, an upper chamber 25, and a bag pressing portion 26 are arranged in the order from front to back. The bottom of the elastic pressure strip 23 protrudes from the lower surface of the flip cover 2, and the evacuation hole 22 is provided at the highest position. The outer end portion 196 of the evacuation hole 22 is provided with an evacuation interface 196, which is connected to an evacuation pump 4 through an air pipe, and the inner end portion of the evacuation hole 22 is flush with the lower surface of the flip cover 2.as in ; Fig. As shown in Figure 7, the bottom of the folding cover 2 is provided with a receiving space 293 in which an evacuation assembly is movably clamped. The evacuation assembly includes an evacuation air pipe and an evacuation interface connected to the end portion of the evacuation air pipe. A group of clamping plates 19 is arranged on the left and right sides of the receiving space 293, and the left and right sides of the evacuation air pipe are clamped to the two groups of clamping plates 19, respectively. At the top of the folding cover 2, an evacuation interface insertion hole 294 is provided, into which the evacuation interface of the evacuation assembly removed from the receiving space 293 is inserted. The top of the evacuation insertion hole 294 is exposed on the upper surface of the folding cover 2. A control valve is arranged in the inner cavity of the folding cover 2.which is electrically connected to the circuit control board 3, and wherein at the inner end portion of the pump-out introduction hole 294, a pump-out interface 297 is arranged, which is connected to the control valve by an air pipe, and wherein the control valve is connected to the evacuation pump 4 to realize an independent pump-out function.

[0015] A lower sealing ring 14 is attached to the upper surface of the lower seat body 1, which surrounds the outer edge of the evacuation section 10 for one round. The inner area of ​​the evacuation section 10 is provided, from front to rear, with a lower liquid storage slot 15 through which the bag body of the vacuum packaging bag 5 can pass inclined upwards, a bag opening heating component 16, and an upper liquid discharge slot 17 for inserting the bag opening of the vacuum packaging bag 5. The lower liquid storage slot 15, the bag opening heating component 16, and the upper liquid discharge slot 17 are each arranged inclined relative to the horizontal plane. After the flip cover is locked on the lower seat body 1, the upper chamber 25 and the lower liquid storage slot 15 form a narrow lower liquid storage chamber.which is arranged inclined relative to the horizontal plane, wherein the liquid storage slot and the bag pressing section 26 form an upper liquid storage chamber, and wherein the inner height of the lower part of the lower liquid storage chamber is greater than the inner height of the upper part of the lower liquid storage chamber, which serves to increase the relative height of the upper liquid discharge slot 17. Namely, the height of the bag opening is increased relative to the lower surface of the lower seat body 1, so that it is more difficult for the liquid in the bag to overflow through the bag opening into the upper liquid discharge slot 17, and the upper surface of the lower liquid storage slot 15 is widened so that after the liquid has inadvertently overflowed through the bag opening into the upper liquid storage chamber and exceeded the front slot opening of the upper liquid discharge slot 17,The liquid flows downward into the lower liquid storage chamber. Along the inclination direction of the evacuation section 10, the width of the lower liquid storage slot 15 is 0.40.6 times the total width of the evacuation section 10, which is approximately half, so that the lower liquid storage chamber has a larger space and the lower liquid storage chamber is capable of holding more liquid. Compared with household vacuum sealing machines with the same external dimensions, the present invention increases the effective space for holding liquid by three times to prevent the upper liquid storage chamber from being filled with accidental overflow of liquid. The working process of evacuating the household vacuum sealing machine consists in driving the evacuation pump 4 to operate continuously for a certain period of time and then stopping.For example, the evacuation pump pumps continuously for 5-10 seconds and then stops evacuating. In the event that the liquid accidentally overflows from the bag opening during the evacuation process, the present invention provides sufficient space to accommodate the liquid and ensures that the liquid overflowing from the bag opening after the evacuation pump 4 stops working has not yet reached the upper surface of the upper liquid storage chamber, i.e., the liquid is never able to reach the evacuation hole 22 located at the highest position, thereby effectively preventing the liquid from entering the evacuation hole 22, so as to avoid the liquid overflowing from the bag opening during the evacuation process and thus contaminating the air pipe.the liquid penetrates into the flip cover 2 or the inner cavity of the lower seat body 1 and the liquid contaminates the air pipe, the evacuation pump 4 and internal parts of the sealing machine, at the same time, the fire accident caused by the contact of the liquid with the circuit control board 3 is avoided, thus improving safety.

[0016] In order to make the household vacuum sealing machine safer and to prevent the liquid of the vacuum packaging bag 5 from overflowing from the bag opening during the evacuation process, the present invention provides the following construction.

[0017] The tip of the bag-opening heating component 16 protrudes from the upper surface of the evacuation section 10, and the bottom of the elastic pressing strip 23 presses against the tip of the bag-opening heating component 16 after the flip cover 2 is locked onto the lower seat body 1; and a first channel 295 is arranged between the left and right sides of the elastic pressing strip 23 and the upper sealing ring 24, and a second channel 295 is arranged between the left and right sides of the bag-opening heating component 16 and the lower sealing ring 14, and the left and right sides of the upper liquid storage chamber are respectively communicated with the left and right sides of the lower liquid storage chamber after the flip cover 2 is locked onto the lower seat body 1.The upper sealing ring 24 presses against the lower sealing ring 14 after the flip cover 2 is locked on the lower seat body 1, wherein the space between the evacuation portion 10 and the evacuation fitting portion 20 is closed to form an isobaric evacuation space with equal pressure during evacuation, and wherein the internal pressure of the bag body of the vacuum packaging bag held in the isobaric evacuation space is equal to the pressure of the isobaric evacuation space.

[0018] The isobaric evacuation space is a narrow space inclined relative to the horizontal plane, having a low front and a high rear. There is a height difference M greater than 5 cm between the tip of the upper liquid discharge slot 17 and the lower surface of the lower seat body 1. The lowest point of the tip of the upper liquid discharge slot 17 is higher than the highest point of the tip of the lower liquid storage slot 15, and there is a height difference N greater than 1 cm between the two. The height by which the outer end portion of the bag opening is raised is 30-40% of the total height of the entire machine. In the existing vacuum sealing machine, the height of the bag opening is C. In the present invention, the height difference (M+NC) by which the bag opening is relatively raised is 30-40% of the total height of the entire machine.that the liquid overflows from the bag opening, as in , Fig. 6, the width of the lower liquid storage slot 15 is 2-3 times the width of the upper liquid discharge slot 17, the volume of the lower liquid storage chamber is more than 2 times the volume of the upper liquid storage chamber, and the width of the upper surface of the widened evacuation section 10 is 0.4-0.5 times the total width of the upper surface of the lower seat body 1. By this design, the volume of the lower liquid storage chamber is made larger compared to a vacuum sealing machine with the same external dimensions.

[0019] Due to the atmospheric pressure, after the vacuum sealing machine evacuates the bag opening, the external pressure of the bag body held outside the vacuum sealing machine is greater than the pressure inside the bag body, and after the pressure difference is large enough and maintained for a certain time, the liquid inside the bag body flows upward and enters the isobaric evacuation space, and the present invention adopts a widened and enlarged isobaric evacuation space, and the pressure inside and outside the bag body held in the isobaric evacuation space is the same, so that the liquid inside the bag body held in the isobaric evacuation space loses the pressure to flow to the bag opening,wherein the width of the upper surface of the lower liquid storage slot 15 along the inclination direction of the evacuation section 10 is 6-10 cm, and the width of the lower liquid storage chamber along the inclination direction of the evacuation section 10 is also 6-10 cm, while the total length H of the bag body of the vacuum packaging bag 5 held in the isobaric evacuation space is increased to 8-15 cm, and wherein a guide ramp 298 with a low front and a high back is arranged at the rear part of the lower liquid storage slot 15, and wherein the upper surface of the rear part of the guide ramp 298 is flush with the upper surface of the bag opening heating component 16, and the isobaric evacuation space adopts an inclined structure with a low front and a high back,which increases the resistance of the liquid in the front bag when passing through the bag opening heating component 16 held in the isobaric evacuation space, has a sufficient total length H to provide a buffer space for stopping the liquid, so that the liquid in the bag body stops at the front of the elastic pressure strip 23 after entering the isobaric evacuation space. On the other hand, the height of the bag opening of the vacuum packaging bag 5 relative to the bag body, and the bag opening heating component 16 protruding from the upper surface of the evacuation section 10 is designed to increase in height. At the same time, the resistance under the action of gravity is greater the closer the liquid in the bag is to the bag opening heating component 16, and the component of the gravity of the liquid in the bag in the horizontal direction is also a resistance that preventsthat the liquid flows towards the bag opening, which makes it difficult for the liquid to pass through the bag opening heating component 16 and also prevents the liquid in the bag from overflowing from the bag opening.

[0020] The evacuation section 10 has a first inclination angle a relative to the horizontal plane, so that the crimping surfaces of the upper sealing ring 24 and the lower sealing ring 14 also have a first inclination angle a relative to the horizontal plane, wherein the first inclination angle a is 25-30 degrees and the highest point of the tip of the bag opening heating component 16 projects upwards by 0.5-1 cm above the crimping surfaces in order to prevent the liquid inside the vacuum packaging bag 5 from running through the bag opening heating component 16.

[0021] Preferably, the first inclination angle α is 28 degrees, the highest point of the tip of the bag opening heating component 16 projects upwards above the crimping surfaces by 0.8 cm, and the width of the lower liquid storage chamber along the inclination direction of the evacuation section 10 is 6 cm, and the total length H of the bag body of the vacuum packaging bag 5 obtained in the isobaric evacuation space is increased to 8-10 cm, which effectively prevents the liquid inside the bag from overflowing from the bag opening.

[0022] The elastic pressure strip 23 is a square silicone strip with an inner cavity, the section of which is formed in an "8" shape. When viewed from the cross section, the elastic pressure strip 23 comprises an installation section on the upper side, two elastic side walls on both sides, and a bag pressing section 26 at the bottom. The upper side of the elastic side wall is integrally knotted with the installation section and the lower side is integrally knotted with the bag pressing section 26. The central part of the elastic side wall is bent toward its inner cavity. The thickness of the fastening section is equal to that of the elastic side wall, and the thickness of the bag pressing section 26 is 2-3 times the thickness of the elastic side wall. A wing section extends outward from the front and rear sides of the bottom of the bag pressing section 26.The lower surface of the bag pressing section 26 and the lower surface of the wing section are knotted into a flat plane to increase the bag pressing area. The lower surface of the flip cover 2 is provided with an adhesive groove. The installation section is fixed to the groove bottom of a horizontal groove. The elastic side wall is freely stored in the horizontal groove. The bag pressing section 26 protrudes from the lower surface of the flip cover 2. The elastic pressure strip 23 with a widened design elastically compresses the bag opening tightly. The liquid inside the bag can still reach the bag opening under the effect of the reduced pressure difference. After the liquid fills the various tiny evacuation air channels inside the bag opening, the various evacuation air channels inside the bag opening are blocked.and the elastic pressure strip 23 with widened design exerts pressure on the bag opening, the external pressure at the bag opening is increased to further reduce the pressure difference, and the elastic pressure strip 23 with widened design has a function of elastically preventing the overflow of the liquid from the bag opening.

[0023] The bag opening heating component 16 includes an insulating seat 162 and two thin metal heating blades 161 with a width of 3-5 mm for forming two uniformly thermally fused sealing strips with a width of 3-5 mm at the bag opening by heat melting, which improves the sealing performance. Two electrodes are attached below the insulating seat 162. The two metal heating blades 161 are arranged in parallel at a distance from each other and are each attached to the upper surface of the insulating seat 162. The left and right ends of the metal heating blade 161 are wound from the outer end portion to a position below the insulating seat 162 and are each attached to the two corresponding electrodes. The circuit control board 3 is electrically connected to the two electrodes to supply power to the metal heating blade 161 and cause it to generate heat.and wherein an insulating material layer is glued and secured above the metal heating blade 161.

[0024] Above the bag feeding section, a gantry knife holder 18 is arranged, which is provided with a bag pressing holder 181 and two rotating arms 187. A shaft seat is integrally formed on the left and right sides of the bag feeding section, each protruding from the upper surface of the bag feeding section. The front end portions of the two rotating arms 187 are respectively fixed to the left and right ends of the bag pressing holder 181, and the rear end portions are each rotatably installed on the shaft seat on the two sides of the bag feeding section. A flat bag pressing surface is provided at the bottom of the bag pressing holder 181. The bag cutting holder forms a lever structure through the rotating arms 187, whereby the bag body can be pressed more smoothly and stably when pressing the bag.to avoid displacement of the bag body during the bag cutting process.

[0025] The upper part of the bag press holder 181 is provided with a sliding slot 183 which penetrates the bag press holder 181 from top to bottom and penetrates the bag press surface downwards, wherein the left and right ends of the sliding slot 183 extend to the left and right sides of the bag press holder 181, respectively, and wherein a sliding block 186 is slidably installed in the sliding slot 183, and wherein a sliding knob 182 is arranged on the upper part of the sliding block 186, which protrudes above the bag press holder 181, and wherein the lower part of the sliding block 186, which protrudes below the bag press holder 181, is attached. and wherein an elliptical shooter head is arranged on the left and right ends of the hook shooter 184, and wherein a left and right cutting blade 185 are clamped and fastened to the central part of the sliding block 186, which are arranged symmetrically, and wherein the cutting edges of the two cutting blades 185 are directed outwards and inclined relative to the hook shooter 184, and wherein the cutting edges of the two cutting blades 185 are each arranged above the corresponding shooter head, and wherein the cutting edge and the corresponding shooter head enclose an apex angle;To make bag cutting easier and more stable, a bag cutting groove 131 is integrally formed on the bag cutting table 13. The left and right sides of the bag cutting groove 131 each penetrate the bag cutting table 13, and a curved transition surface is arranged between the tip of the bag cutting groove 131 and the upper surface of the bag cutting table 13. The hook shuttle 184 is placed in the bag cutting groove 131 after the bag pressing holder 181 presses against the bag cutting table 13, and the hook shuttle 184 slides synchronously left and right in the bag cutting groove 131 as the slide knob 182 is slid left and right. The cooperation between the hook shuttle 184 and the bag cutting groove 131 can stabilize and limit the cutting position of the bag body, so that the bag can be cut more easily and smoothly.

[0026] On the rear wall of the upper liquid discharge slot 17, left and right deflection plates 8 are integrally formed, which are arranged at a distance from each other, wherein the upper part of the deflection plate 8 is bent forward and forms an anti-roll portion of the bag opening; and wherein three pressure plates 9 are arranged horizontally along the X-axis at a distance from each other, and wherein the two deflection plates 8 are inserted into the intervals between the three pressure plates 9 when the flip cover 2 is locked onto the upper part of the lower seat body 1, and wherein the pressure plate 9 is located at the middle and front side of the upper evacuation chamber, and wherein the lowest point of the pressure plate 9 is higher than the front side wall of the liquid storage slot and lower than the front side wall of the liquid storage slot, and wherein the deflection plate 8 is located at the rear of the upper evacuation chamber,and wherein the anti-roll portion of the bag opening is located at the rear of the pressure plate 9 and is close to the rear wall surface of the pressure plate 9, and wherein the highest point of the anti-roll portion of the bag opening projects upwardly above the upper middle portion of the pressure plate 9, so that each time the bag opening is inserted into the upper liquid discharge slot 17, the bag opening can be smoothly inserted into place and the bag opening is held downward. In this way, the problem that the blind insertion is not in place and the bag opening bends upward during blind insertion is solved because the insertion of the bag opening cannot be observed during bag insertion.

Claims

[1] A household vacuum sealing machine comprising a lower seat body (1) and a flip cover (2), wherein the back of the flip cover (2) is rotatably installed on the upper part of the lower seat body (1), and wherein a circuit control board (3) and an evacuation pump (4) are installed in the inner cavity of the lower seat body (1) or the flip cover (2), and wherein the circuit control board (3) is electrically connected to the evacuation pump (4), and wherein a locking hook (21) is arranged on the left and right sides of the lower surface of the flip cover (2), and wherein a locking position (11) is provided on the left and right sides of the upper surface of the lower seat body (1), into which the locking hook (21) is inserted on the corresponding side, in order to realize that the flip cover (2) is locked to the upper part of the lower seat body (1) during evacuation, characterized bythat the front part of the upper surface of the lower seat body (1) is arranged as an inclined evacuation section (10) with a low front and a high back and the rear part as a bag feeding section, wherein the bag feeding section is provided with a bag feeding cavity (12) for receiving rolled-up bags, and wherein a bag cutting table (13) is provided at the front of the bag feeding cavity (12) and extends forward to the evacuation section (10), and wherein the left and right sides of the evacuation section (10) extend to the left and right locking positions (11) respectively;and wherein an evacuation fitting portion (20) is arranged on the lower surface of the folding cover (2), and wherein an upper sealing ring (24) is fixed to the lower surface of the folding cover (2) and surrounds the outer edge of the evacuation fitting portion (20) for one round, and wherein an elastic pressure strip (23) and an evacuation hole (22) are provided in the inner region of the evacuation fitting portion (20), and wherein the outer end portion of the evacuation hole (22) is connected to the evacuation pump (4) by an air pipe, and wherein the inner end portion of the evacuation hole (22) is flush with the lower surface of the folding cover (2);and wherein a lower sealing ring (14) is attached to the upper surface of the lower seat body (1), which surrounds the outer edge of the evacuation section (10) for one round, and wherein the inner region of the evacuation section (10) is provided, from front to rear, with a lower liquid storage slot (15) through which the bag body of the vacuum packaging bag (5) can pass inclined upwards, a bag opening heating component (16), and an upper liquid discharge slot (17) for inserting the bag opening of the vacuum packaging bag (5), and wherein the lower liquid storage slot (15), the bag opening heating component (16), and the upper liquid discharge slot (17) are each arranged inclined relative to the horizontal plane, and wherein, along the inclination direction of the evacuation section (10), the width of the lower liquid storage slot (15) is 0.4-0.6 times the total width of the evacuation section (10);and wherein the tip of the bag-opening heating component (16) protrudes above the upper surface of the evacuation section (10), and wherein the bottom of the elastic pressure strip (23) presses against the tip of the bag-opening heating component (16) after the flip cover (2) has been locked onto the lower seat body (1); and wherein the upper sealing ring (24) presses against the lower sealing ring (14) after the flip cover (2) has been locked onto the lower seat body (1), and wherein the space between the evacuation section (10) and the evacuation fitting section (20) is closed to form an isobaric evacuation space with equal pressure during evacuation, and wherein the internal pressure of the bag body of the vacuum packaging bag (5) held in the isobaric evacuation space is equal to the pressure of the isobaric evacuation space. [2] Household vacuum sealing machine according to claim 1, characterized bythat the evacuation section (10) has a first angle of inclination α relative to the horizontal plane, so that the crimping surfaces of the upper sealing ring (24) and the lower sealing ring (14) have a first angle of inclination α relative to the horizontal plane, wherein the first angle of inclination α is 25-30 degrees and the highest point of the tip of the bag opening heating component (16) projects upwards above the crimping surfaces by 0.5-1 cm to prevent the liquid inside the vacuum packaging bag (5) from running through the bag opening heating component (16), and wherein the total length H of the bag body of the vacuum packaging bag (5) held in the isobaric evacuation space is increased to 8-15 cm, and wherein a guide ramp (298) with a low front and a high back is arranged at the rear part of the lower liquid storage slot (15),and wherein the upper surface of the rear portion of the guide ramp (298) is flush with the upper surface of the bag opening heating component (16). [3] Household vacuum sealing machine according to claim 2, characterized bythat an upper chamber (25) and a bag pressing section (26) are further arranged in the inner region of the evacuation fitting section (20), wherein the upper chamber (25), the elastic pressure strip (23) and the bag pressing section (26) are arranged sequentially from front to rear in the inner region of the evacuation fitting section (20), and wherein the bottom of the elastic pressure strip (23) protrudes from the lower surface of the flip cover (2);and wherein, after the flip cover (2) has been locked onto the lower seat body (1), the upper chamber (25) and the lower liquid storage slot (15) form a narrow lower liquid storage chamber arranged inclined relative to the horizontal plane, and wherein the inner height of the lower part of the lower liquid storage chamber is greater than the inner height of the upper part of the lower liquid storage chamber, and wherein the upper liquid discharge slot (17) and the bag pressing section (26) form an upper liquid storage chamber; wherein along the inclination direction of the evacuation section (10), the width of the lower liquid storage chamber is 6-10 cm, and wherein the total length H of the bag body of the vacuum packaging bag (5) held in the isobaric evacuation space is increased to 8-15 cm;and wherein a first channel (295) is arranged between the left and right sides of the elastic pressure strip (23) and the upper sealing ring (24), and wherein a second channel (295) is arranged between the left and right sides of the bag opening heating component (16) and the lower sealing ring (14), and wherein the left and right sides of the upper liquid storage chamber are respectively in communication with the left and right sides of the lower liquid storage chamber after the flip cover (2) has been locked onto the lower seat body (1); [4] Household vacuum sealing machine according to claim 3, characterized bythat the isobaric evacuation space is a narrow space arranged inclined relative to the horizontal plane, having a low front and a high rear, wherein there is a height difference M greater than 5 cm between the tip of the upper liquid discharge slot (17) and the lower surface of the lower seat body (1), and wherein the lowest point of the tip of the upper liquid discharge slot (17) is higher than the highest point of the tip of the lower liquid storage slot (15), and there is a height difference N between the two that is greater than 1 cm, and wherein the height by which the outer end portion of the bag opening is raised is 30-40% of the total height of the entire machine, and wherein the width of the lower liquid storage slot (15) is 2-3 times the width of the upper liquid discharge slot (17),and wherein the volume of the lower liquid storage chamber is more than 2 times the volume of the upper liquid storage chamber, and wherein the width of the upper surface of the widened evacuation section (10) is 0.4-0.5 times the total width of the upper surface of the lower seat body (1). [5] Household vacuum sealing machine according to claim 4, characterized bythat the elastic pressure strip (23) is a square silicone strip with an inner cavity, the section of which is formed in an "8" shape, wherein the elastic pressure strip (23), when viewed from the cross section, comprises an installation section on the upper side, two elastic side walls on both sides, and a bag pressing section (26) at the bottom, and wherein the upper side of the elastic side wall is knotted integrally with the installation section and the lower side is knotted integrally with the bag pressing section (26), and wherein the central part of the elastic side wall is bent towards its inner cavity, and wherein the thickness of the fastening section is equal to that of the elastic side wall, and wherein the thickness of the bag pressing section (26) is 2-3 times the thickness of the elastic side wall, and wherein a wing section extends outwards from the front and rear sides of the bottom of the bag pressing section (26).and wherein the lower surface of the bag pressing section (26) and the lower surface of the wing section are knotted into a flat plane to increase the bag pressing area, and wherein the lower surface of the folding cover (2) is provided with an adhesive groove, and wherein the installation section is fixed to the groove bottom of a horizontal groove, and wherein the elastic side wall is freely stored in the horizontal groove, and wherein the bag pressing section (26) protrudes from the lower surface of the folding cover (2). [6] Household vacuum sealing machine according to claim 1, characterized byin that the bag opening heating component (16) comprises an insulating seat (162) and two thin metal heating blades (161) with a width of 3-5 mm, wherein two electrodes are attached below the insulating seat (162), and wherein the two metal heating blades (161) are arranged in parallel at a distance from each other and are each attached to the upper surface of the insulating seat (162), and wherein the left and right ends of the metal heating blade (161) are wound from the outer end portion to a position below the insulating seat (162) and are each attached to the two corresponding electrodes, and wherein the circuit control board (3) is electrically connected to each of the two electrodes in order to supply the metal heating blade (161) with current and cause it to generate heat, and wherein an insulating material layer is glued and attached above the metal heating blade (161). [7] Household vacuum sealing machine according to claim 1, characterized bythat a portal knife holder (18) is arranged above the bag feed section, which is provided with a bag press holder (181) and two rotating arms (187), wherein on the left and right sides of the bag feed section, a shaft seat is formed in one piece, which protrudes from the upper surface of the bag feed section, and wherein the front end portions of the two rotating arms (187) are respectively fixed to the left and right ends of the bag press holder (181), and the rear end portions are each rotatably installed on the shaft seat on the two sides of the bag feed section, and wherein a flat bag press surface is provided on the bottom of the bag press holder (181), and wherein the upper part of the bag press holder (181) is provided with a sliding slot (183) which penetrates the bag press holder (181) from top to bottom and penetrates the bag press surface downwards,and wherein the left and right ends of the sliding slot (183) extend to the left and right sides of the bag press holder (181), respectively, and wherein a sliding block (186) is slidably installed in the sliding slot (183), and wherein a sliding knob (182) is arranged on the upper part of the sliding block (186) and projects above the bag press holder (181), and wherein a sliding knob (182) is fixed to the lower part of the sliding block (186) and projects below the bag press holder (181), and wherein an elliptical shooter head is arranged on the left and right ends of the hook shooter (184), and wherein left and right cutting knives (185) are clamped and fixed to the central part of the sliding block (186), which are arranged symmetrically, and wherein the cutting edges of the two cutting knives (185) are directed outwards and arranged inclined relative to the hook shooter (184), and wherein the cutting edges of the both cutting knives (185) are each arranged above the corresponding shooter head,and wherein the cutting edge and the corresponding shuttle head enclose an apex angle; and wherein a bag cutting groove (131) is formed integrally on the truncated cone (13), and wherein the left and right sides of the bag cutting groove (131) each penetrate the bag cutting table (13), and wherein a curved transition surface is arranged between the apex of the bag cutting groove (131) and the upper surface of the bag cutting table (13); and wherein the hook shuttle (184) is placed in the bag cutting groove (131) after the bag pressing holder (181) has pressed against the bag cutting table (13), and wherein the hook shuttle (184) slides synchronously to the left and right in the bag cutting groove (131) when the sliding button (182) is pushed to the left and right. [8] Household vacuum sealing machine according to claim 1, characterized bythat on the upper surface of the flip cover (2) a handle (27) is rotatably installed, which protrudes from the front of the flip cover (2), wherein a rotary shaft (28) is rotatably mounted in the inner cavity of the flip cover (2), and wherein the rear side of the handle (27) is fixed to the central part of the rotary shaft (28), and wherein the left and right sides of the rotary shaft (28) extend to the left and right locking hooks (21) respectively, and wherein the rear end portions of the two locking hooks (21) are respectively installed on the rotary shaft (28);and wherein a locking sleeve (29) is formed in one piece on the left and right sides of the lower surface of the folding cover (2), and wherein a positioning section (291) is formed in one piece on the inside of each of the two locking sleeves (29), and wherein the height of the front side of the positioning section (291) is smaller than that of its rear side, and wherein an arcuate corner is provided on each of the front and rear sides of the positioning section (291);and wherein the locking position (11) is a functional chamber which is formed in one piece on the lower seat body (1), and wherein a main chamber for the free arrangement of the locking sleeve (29) is provided on the outside of the locking position (11), and wherein a sub-chamber is provided on the inside of the locking position (11), the shape of which is adapted to the positioning section (291), and wherein the positioning section (291) is pressed against the sub-chamber after the locking sleeve (29) has been pressed into the locking position (11);and wherein a locking window (292) is provided in front of the locking sleeve (29), wherein a locking hook (21) is rotatably installed in a locking sleeve (29), and wherein, after the handle (27) causes the locking hook (21) to rotate, the front end portion of the locking hook (21) protrudes from the locking window (292), and wherein a C-shaped hook body is arranged on the outer end portion of the locking hook (21), and wherein two non-slip rubber blocks (211) are arranged at a distance from each other on the outer side surface of the hook body; and wherein a locking hole (6) is provided on the front side surface of the main chamber, and wherein, when the flip cover (2) is locked, the hook body is rotatably inserted into the corresponding locking hole (6), and wherein the non-slip rubber blocks (211) of the hook body interact in abutting manner with the lower surface of the main chamber;and wherein the bottom of the locking position (11) is provided with a drainage hole (7); [9] Household vacuum sealing machine according to claim 1, characterized bythat on the rear wall of the upper liquid discharge slot (17), left and right deflection plates (8) are formed in one piece, which are arranged at a distance from each other, wherein the upper part of the deflection plate (8) is bent forward and forms an anti-roll section of the bag opening; and wherein three pressure plates (9) are arranged horizontally along the X-axis at a distance from each other, and wherein the two deflection plates (8) are inserted into the intervals between the three pressure plates (9) when the flip cover (2) is locked onto the upper part of the lower seat body (1), and wherein the pressure plate (9) is located at the middle and front side of the upper evacuation chamber, and wherein the lowest point of the pressure plate (9) is higher than the front side wall of the liquid storage slot and lower than the front side wall of the liquid storage slot,and wherein the deflection plate (8) is located at the rear of the upper evacuation chamber, and wherein the anti-roll portion of the bag opening is located at the rear of the pressure plate (9) and is close to the rear wall surface of the pressure plate (9), and wherein the highest point of the anti-roll portion of the bag opening projects upwards above the upper middle portion of the pressure plate (9). [10] Household vacuum sealing machine according to claim 1, characterized bythat the bottom of the folding cover (2) is provided with a receiving space (293) in which an evacuation assembly is movably clamped, wherein the evacuation assembly comprises an evacuation air pipe and an evacuation interface connected to the end portion of the evacuation air pipe, and wherein a group of clamping plates (19) is arranged on the left and right sides of the receiving space (293), and wherein the left and right sides of the evacuation air pipe are respectively clamped to the two groups of clamping plates (19), and wherein an evacuation introduction hole (294) is provided at the top of the folding cover (2), and wherein the upper part of the evacuation introduction hole (294) is exposed on the upper surface of the folding cover (2), and wherein a control valve is arranged in the inner cavity of the folding cover (2), which is electrically connected to the circuit control board (3), and wherein the evacuation introduction hole (294) is provided with connected to the control valve,and wherein the control valve is connected to the evacuation pump (4).,

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