A vacuum sealing machine with improved pressure relief sealing performance

Abstract

The utility model discloses a vacuum sealing machine with improved pressure relief sealing performance. The pressure relief mechanism includes a pressure relief pipe, a pressure relief seat, a pressure relief drive assembly and a pressure relief plug. The pressure relief drive assembly is connected to the pressure relief seat or the pressure relief plug in a transmission manner. The pressure relief seat and the pressure relief plug move toward and away from each other. The pressure relief seat is provided with a sealing groove with an opening toward the pressure relief plug. The bottom of the sealing groove is provided with a pressure relief port. The pressure relief port is connected to the pressure relief pipe, and the pressure relief pipe is connected to an air pump mechanism. The inner diameter of the pressure relief port is smaller than the inner diameter of the sealing groove. The pressure relief plug is inserted into the sealing groove and abuts against the bottom of the sealing groove to seal the pressure relief port. When sealing, the pressure relief plug is inserted into the sealing groove under the action of the pressure relief drive assembly, so that the end of the pressure relief plug abuts against the bottom of the sealing groove and forms a seal on the pressure relief port. The pressure relief plug is not easy to deviate from the pressure relief port, thereby improving reliability and stability.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum sealers, in particular to a vacuum sealer with improved pressure relief and sealing properties. Background Art

[0002] A vacuum sealer is a household appliance that evacuates and heat-seals vacuum packaging bags. The vacuum sealer includes an upper cover and a lower seat. The upper cover is rotatably mounted on the lower seat, and the lower seat is provided with a vacuum groove. When evacuating, the bag mouth of the vacuum packaging bag is inserted into the vacuum groove, and then the upper cover is buckled on the lower seat and locked by a locking mechanism. The vacuum groove is evacuated or filled with nitrogen by a pump, thereby evacuating or filling the vacuum packaging bag with nitrogen; a heat sealing mechanism is provided on the front side of the vacuum groove, and the vacuum packaging bag is heat-melted and sealed by the heat sealing mechanism after vacuuming or filling. After sealing, it is often necessary to relieve the pressure of the vacuum groove through a pressure relief mechanism so that the upper cover can be easily opened; some vacuum sealers have an air bag on their heat sealing mechanism, which compresses the vacuum packaging bag, and the air bag also needs to be relieved by the pressure relief mechanism when opening the cover.

[0003] The traditional pressure relief mechanism includes a sealing gasket and a pressure relief pipe. The sealing gasket is pressed against the pipe mouth of the pressure relief pipe to achieve sealing. Therefore, the contact area between the pressure relief pipe and the sealing gasket is only the annular cross-section of the pressure relief pipe. The connection area is small, resulting in poor sealing effect of the sealing gasket on the pressure relief pipe. The sealing gasket is easy to deviate from the pressure relief port, resulting in accidental pressure relief. In addition, the contact area is flat, and stains such as dust and oil stains are easy to adhere to the pipe mouth or the sealing gasket, resulting in sealing failure. When relieving pressure, the sealing gasket and the pressure relief pipe need to be separated. At this time, the pipe mouth of the pressure relief pipe is open, and impurities are easy to enter the pressure relief pipe. When vacuuming, the impurities are sucked into the pump, resulting in pump damage, poor stability and reliability, so it is necessary to improve it. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a vacuum sealing machine with improved pressure relief sealing, improve the sealing of the pressure relief mechanism, improve the pressure holding capacity, prevent impurities from entering the pressure relief pipe, and improve reliability and stability.

[0005] In order to achieve the above-mentioned purpose, the technical scheme adopted by the utility model is: a vacuum sealing machine with improved pressure relief sealing performance, comprising an upper cover, a lower seat, an air pump mechanism and a heat sealing mechanism, the upper cover is rotatably installed on the upper part of the lower seat, a vacuum groove is arranged at the front part of the lower seat, the air pump mechanism is arranged in the lower seat, the heat sealing mechanism is arranged at the front side of the vacuum groove, the air pump mechanism is connected to the vacuum groove and / or the heat sealing mechanism, the air pump mechanism is connected to the pressure relief mechanism, the pressure relief mechanism comprises a pressure relief pipe, a pressure relief seat, a pressure relief drive assembly and a pressure relief plug, the pressure relief drive assembly is transmission-connected to the pressure relief seat or the pressure relief plug, the pressure relief seat and the pressure relief plug move towards and away from each other, the pressure relief seat is provided with a sealing groove with an opening facing the pressure relief plug, a pressure relief port is provided at the bottom of the sealing groove, the pressure relief port is connected to the pressure relief pipe, the pressure relief pipe is connected to the air pump mechanism, the inner diameter of the pressure relief port is smaller than the inner diameter of the sealing groove, the pressure relief plug is inserted into the sealing groove and cooperates with the bottom of the sealing groove to seal the pressure relief port.

[0006] In a further technical solution, at least one pressure relief groove is provided on the inner wall of the sealing groove along the length direction of the pressure relief rubber plug, and the outer end of the pressure relief groove extends to the opening of the sealing groove and is connected to the atmosphere. During pressure relief, the pressure relief rubber plug is located in the sealing groove and a pressure relief gap is provided between the pressure relief rubber plug and the bottom of the sealing groove, and the pressure relief groove, the pressure relief gap and the pressure relief port are connected to form a pressure relief channel.

[0007] In a further technical solution, the pressure relief rubber plug includes an integrally formed sealing portion, a fixed portion and a limiting portion, the fixed portion is formed between the sealing portion and the limiting portion, the sealing portion is slidably installed in the sealing groove, the first end of the sealing portion is integrally formed with the fixed portion, the second end of the sealing portion is abutted against the bottom of the sealing groove, the side wall of the sealing portion is abutted against the inner wall of the sealing groove, and the fixed portion is fixedly installed on the lower seat or is transmission-connected to the pressure relief drive assembly.

[0008] In a further technical solution, a hemispherical groove is provided at the bottom of the sealing groove, and a hemispherical convex block is provided at the second end of the corresponding sealing portion, and the convex block is seamlessly embedded and connected with the groove.

[0009] In a further technical solution, the outer diameters of the sealing part and the limiting part are both larger than the outer diameter of the fixing part, the fixing part is clamped with a fixing seat, the sealing part and the limiting part respectively cooperate with the two sides of the fixing seat, the fixing seat is fixed or molded on the lower seat, and the pressure relief seat is transmission connected to the pressure relief drive assembly.

[0010] In a further technical solution, the lower seat is provided with a locking cover mechanism, the pressure relief drive assembly is the locking cover mechanism, the locking cover mechanism includes a locking cover slider and a reset spring, the locking cover slider is slidably installed in the lower seat, the outer end of the locking cover slider protrudes from the lower seat, and the reset spring is arranged between the locking cover slider and the lower seat to realize the outward reset of the locking cover slider;

[0011] The pressure relief plug or the pressure relief seat is fixedly installed on the lock cover slider. The left and right sides of the upper cover are respectively provided with clamping blocks. The upper part of the lower seat is provided with a through hole. The clamping block passes through the through hole and is buckled and connected with the lock cover slider.

[0012] In a further technical solution, a locking cover mechanism is respectively provided on the left and right sides of the lower seat, and the air pump mechanism is connected to two pressure relief mechanisms. Each locking cover mechanism includes an unlocking button, a locking plate and a spring fixing column. The locking plate is slidably installed in the lower seat, the unlocking button is formed at the outer end of the locking plate and protrudes from the outer side surface of the lower seat, the spring fixing column is formed at the inner end of the locking plate, the reset spring is sleeved on the spring fixing column, the locking plate is provided with a locking hole, the inner wall of the locking hole is provided with a card foot, a card slot is provided on one side of the clamping block, and the card foot is connected with the card slot by a snap.

[0013] In a further technical solution, the pressure relief seat is provided with a connecting column, the pressure relief port passes through the connecting column, the outer end of the connecting column is provided with a guide bevel, the connecting column is inserted in the pressure relief pipe, and the outer edge of the sealing groove is provided with a connecting plate, the connecting plate is formed at the inner end of the locking plate, and the opening of the sealing groove faces the unlocking button.

[0014] In a further technical solution, the heat sealing mechanism includes a bag pressing assembly and a heating assembly. The heating assembly is fixedly installed at the front of the lower seat and located at the front side of the vacuum groove. The bag pressing assembly is fixedly installed at the front of the upper cover. The bag pressing assembly is provided with a bag pressing airbag. The bag pressing airbag and the heating assembly move relative to each other and are pressed against each other. The bag pressing airbag and the vacuum groove are respectively connected to the air pump mechanism.

[0015] In a further technical solution, the air pump mechanism includes an inflation pump, an exhaust pump, an exhaust pipe group and an inflation pipe group. The inflation pump and the exhaust pump are both arranged in the lower seat. The air outlet interface of the inflation pump is connected to the inflation pipe group, the inflation pipe group is connected to the pressure bag airbag, the air inlet interface of the exhaust pump is connected to the exhaust pipe group, the exhaust pipe group is connected to the vacuum tank, the pressure relief pipe of the first pressure relief mechanism is connected to the inflation pipe group, and the pressure relief pipe of the second pressure relief mechanism is connected to the exhaust pipe group.

[0016] After adopting the above structure, the advantages of the utility model compared with the prior art are as follows: when sealing, the pressure relief plug is inserted into the sealing groove under the action of the pressure relief drive component, so that the end of the pressure relief plug is pressed against the bottom of the sealing groove and forms a seal for the pressure relief port, and the pressure relief plug is not easy to deviate from the pressure relief port, thereby improving reliability and stability; under the action of the pressure relief drive component, the pressure relief plug will produce a certain deformation, so that the outer side of the pressure relief plug is close to the inner wall of the sealing groove, thereby increasing the sealing area, improving the sealing effect and pressure holding capacity; when releasing pressure, the pressure relief drive component separates the pressure relief plug from the bottom of the sealing groove and generates a pressure relief gap, and the pressure relief gap connects the pressure relief port with the pressure relief groove, thereby releasing pressure, and there is no need to move the pressure relief plug out of the sealing groove, preventing impurities or foreign matter from entering the pressure relief pipe during pressure relief, thereby improving reliability and stability; the pressure relief drive component adopts a locking cover mechanism, which completes pressure relief while unlocking, has a simple structure, low cost, and is more convenient to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 It is a structural schematic diagram of the utility model;

[0019] Figure 2 It is a schematic diagram of the internal structure of the lower seat of the utility model;

[0020] Figure 3 The utility model Figure 2 A magnified view of part A;

[0021] Figure 4 It is an exploded view of the pressure relief mechanism of the utility model;

[0022] Figure 5 It is a cross-sectional view of the pressure relief mechanism of the utility model during pressure relief;

[0023] Figure 6 It is a cross-sectional view of the pressure relief mechanism of the utility model when maintaining pressure.

[0024] In the figure:

[0025] 1 upper cover, 11 card connection block, 111 card slot;

[0026] 2 lower seat, 21 vacuum groove, 22 perforation, 23 fixed seat;

[0027] 31 an air pump, 32 an air extraction pump, 33 an air filling tube assembly, 34 an air extraction tube assembly;

[0028] 41 pressure bag airbag, 42 heating component;

[0029] 5 pressure relief mechanism, 51 pressure relief pipe, 52 pressure relief seat, 521 sealing groove, 522 pressure relief port, 523 pressure relief groove, 524 groove, 525 connecting column, 526 guide bevel, 527 connecting plate, 53 pressure relief rubber plug, 531 sealing part, 532 fixing part, 533 limiting part, 534 protrusion, 54 pressure relief gap;

[0030] 6 locking cover mechanism, 61 unlocking button, 62 locking plate, 621 locking hole, 622 clamping foot, 63 spring fixing column, 64 return spring. DETAILED DESCRIPTION

[0031] The following are only preferred embodiments of the present invention, and do not limit the protection scope of the present invention.

[0032] A vacuum sealer with improved pressure relief sealing performance, such as Figures 1 to 6 As shown, it includes an upper cover 1, a lower seat 2, an air pump mechanism and a heat sealing mechanism. The upper cover 1 is rotatably mounted on the upper part of the lower seat 2. The front part of the lower seat 2 is provided with a vacuum groove 21. The air pump mechanism is arranged in the lower seat 2. The heat sealing mechanism is arranged on the front side of the vacuum groove 21. The air pump mechanism is connected to the vacuum groove 21 and / or the heat sealing mechanism. The air pump mechanism is connected to a pressure relief mechanism 5. The pressure relief mechanism 5 includes a pressure relief pipe 51, a pressure relief seat 52, a pressure relief drive assembly and a pressure relief plug 53. The pressure relief drive assembly is connected to the pressure relief seat 52 or the pressure relief plug 53 is transmission connected, the pressure relief seat 52 and the pressure relief plug 53 move towards and away from each other, the pressure relief seat 52 is provided with a sealing groove 521 whose opening is toward the pressure relief plug 53, the bottom of the sealing groove 521 is provided with a pressure relief port 522, the pressure relief port 522 is connected to the pressure relief pipe 51, the pressure relief pipe 51 is connected to the air pump mechanism, the inner diameter of the pressure relief port 522 is smaller than the inner diameter of the sealing groove 521, the pressure relief plug 53 is inserted into the sealing groove 521 and cooperates with the bottom of the sealing groove 521 to seal the pressure relief port 522.

[0033] The traditional vacuum sealer performs a planar seal between the sealing gasket and the pressure relief pipe 51 during pressure relief. The sealing gasket and the pipe mouth of the pressure relief pipe 51 are easily misaligned, resulting in poor sealing effect, or even sealing failure, inability to maintain pressure, and poor stability and reliability. However, during sealing, the pressure relief plug 53 of the utility model is inserted into the sealing groove 521 under the action of the pressure relief drive component, so that the end of the pressure relief plug 53 is pressed against the bottom of the sealing groove 521 and forms a seal for the pressure relief port 522. The pressure relief plug 53 is not easy to deviate from the pressure relief port 522, thereby improving reliability and stability; under the action of the pressure relief drive component, the pressure relief plug 53 will produce a certain deformation, so that the outer side of the pressure relief plug 53 is close to the inner wall of the sealing groove 521, thereby increasing the sealing area and improving the sealing effect and pressure maintaining capacity.

[0034] Specifically, the inner wall of the sealing groove 521 is provided with at least one pressure relief groove 523 along the length direction of the pressure relief rubber plug 53, the outer end of the pressure relief groove 523 extends to the opening of the sealing groove 521 and is connected to the atmosphere, during pressure relief, the pressure relief rubber plug 53 is located in the sealing groove 521, and a pressure relief gap 54 is provided between the pressure relief rubber plug 53 and the groove bottom of the sealing groove 521, and the pressure relief groove 523, the pressure relief gap 54 and the pressure relief port 522 are connected to form a pressure relief channel. During pressure relief, the pressure relief drive assembly separates the pressure relief rubber plug 53 from the groove bottom of the sealing groove 521 and generates a pressure relief gap 54, and the pressure relief gap 54 connects the pressure relief port 522 with the pressure relief groove 523 to form a pressure relief channel, thereby performing pressure relief, without the need for the pressure relief rubber plug 53 to be moved out of the sealing groove 521, preventing impurities or foreign matter from entering the pressure relief pipe 51 during pressure relief, thereby improving reliability and stability.

[0035] Specifically, the pressure relief rubber plug 53 includes an integrally formed sealing portion 531, a fixing portion 532 and a limiting portion 533, the fixing portion 532 is formed between the sealing portion 531 and the limiting portion 533, the sealing portion 531 is slidably installed in the sealing groove 521, the first end of the sealing portion 531 is integrally formed with the fixing portion 532, the second end of the sealing portion 531 is abutted against the bottom of the sealing groove 521, the side wall of the sealing portion 531 is abutted against the inner wall of the sealing groove 521, and the fixing portion 532 is fixedly installed on the lower seat 2 or is transmission-connected with the pressure relief drive assembly. The pressure relief rubber plug 53 is integrally formed with a silicone material, has a simple structure, low cost, and is easy to produce.

[0036] Specifically, a hemispherical groove 524 is provided at the bottom of the sealing groove 521, and a hemispherical convex block 534 is provided at the second end of the corresponding sealing portion 531, and the convex block 534 is seamlessly embedded and connected with the groove 524. Through the hemispherical groove 524 and the convex block 534, the contact area between the sealing groove 521 and the pressure relief rubber plug 53 is further increased, and the sealing effect is further improved.

[0037] Specifically, the outer diameters of the sealing portion 531 and the limiting portion 533 are larger than the outer diameter of the fixing portion 532. The fixing portion 532 is clamped with the fixing seat 23. The sealing portion 531 and the limiting portion 533 are respectively matched with the two sides of the fixing seat 23. The fixing seat 23 is fixed or formed on the lower seat 2. The pressure relief seat 52 is connected to the pressure relief drive assembly. The fixing seat 23 is formed on the lower seat 2, with a simple structure and low cost. The pressure relief rubber plug 53 is clamped on the fixing seat 23 through the fixing portion 532, which is convenient for replacement and prolongs the service life of the vacuum sealer. The pressure relief pipe 51 adopts a hose, and the pressure relief drive assembly drives the pressure relief seat 52 to move.

[0038] Specifically, the lower seat 2 is provided with a locking cover mechanism 6, and the pressure relief drive assembly is the locking cover mechanism 6. The locking cover mechanism 6 includes a locking cover slider and a reset spring 64. The locking cover slider is slidably installed in the lower seat 2, and the outer end of the locking cover slider protrudes from the lower seat 2. The reset spring 64 is arranged between the locking cover slider and the lower seat 2 to achieve the outward reset of the locking cover slider; the pressure relief rubber plug 53 or the pressure relief seat 52 is fixedly installed on the locking cover slider, and the left and right sides of the upper cover 1 are respectively provided with a clamping block 11, and the upper part of the lower seat 2 is provided with a through hole 22, and the clamping block 11 passes through the through hole 22 and is buckled with the locking cover slider. The pressure relief drive assembly adopts the locking cover mechanism 6, which completes the pressure relief while unlocking, has a simple structure, low cost, and is more convenient to operate.

[0039] Specifically, a locking cover mechanism 6 is respectively provided on the left and right sides of the lower seat 2, and the air pump mechanism is connected to two pressure relief mechanisms 5. Each locking cover mechanism 6 includes an unlocking button 61, a locking plate 62 and a spring fixing column 63. The locking plate 62 is slidably installed in the lower seat 2. The unlocking button 61 is formed at the outer end of the locking plate 62 and protrudes from the outer side surface of the lower seat 2. The spring fixing column 63 is formed at the inner end of the locking plate 62. The reset spring 64 is sleeved on the spring fixing column 63. The locking plate 62 is provided with a locking hole 621. The inner wall of the locking hole 621 is provided with a clamping foot 622. A clamping groove 111 is provided on one side of the clamping block 11, and the clamping foot 622 is clamped and connected with the clamping groove 111. When unlocking, the locking plate 62 is driven to move inward by pressing the unlocking button 61, so that the clamping block 11 is separated from the clamping foot 622; when locking, the locking cover slider is reset outward under the action of the reset spring 64, so that the clamping foot 622 is clamped and connected with the clamping groove 111. A locking cover mechanism 6 is respectively provided on the left and right sides of the lower seat 2 to increase the locking force between the upper cover 1 and the lower seat 2 and to make the force more uniform.

[0040] Specifically, the pressure relief seat 52 is provided with a connecting column 525, the pressure relief port 522 passes through the connecting column 525, the outer end of the connecting column 525 is provided with a guiding bevel 526, the connecting column 525 is inserted into the pressure relief pipe 51, the outer edge of the sealing groove 521 is provided with a connecting plate 527, the connecting plate 527 is formed at the inner end of the locking plate 62, and the opening of the sealing groove 521 faces the unlocking button 61. The pressure relief seat 52 and the pressure relief pipe 51 are connected by the connecting column 525, and the guiding bevel 526 guides the pressure relief pipe 51, so that the pressure relief pipe 51 is easily installed.

[0041] Specifically, the heat sealing mechanism includes a bag pressing assembly and a heating assembly 42. The heating assembly 42 is fixedly installed at the front of the lower seat 2 and is located at the front side of the vacuum groove 21. The bag pressing assembly is fixedly installed at the front of the upper cover 1. The bag pressing assembly is provided with a bag pressing airbag 41. The bag pressing airbag 41 and the heating assembly 42 move relative to each other and are pressed together. The bag pressing airbag 41 and the vacuum groove 21 are respectively connected to the air pump mechanism. The traditional bag pressing assembly adopts a sealing strip to press against the heating component 42, thereby pressing the vacuum packaging bag against the heating component 42 for heat sealing. However, regardless of whether the sealing operation is being performed, the sealing strip will press against the heating component 42 after the upper cover 1 and the lower seat 2 are buckled together, which results in the heating component 42 being unable to obtain a good heat dissipation environment. The long-term continuous operation of the vacuum sealer will cause the temperature of the heating component 42 to be too high and trigger the high-temperature protection. It is necessary to wait for the heating component 42 to cool down before it can work. The utility model replaces the sealing strip with a bag pressing airbag 41. When sealing, the air pump mechanism inflates the bag pressing airbag 41, so that the bag pressing airbag 41 expands and presses against the heating component 42; when the sealing is completed, the bag pressing airbag 41 is deflated and depressurized by the pressure relief mechanism, so that the bag pressing airbag 41 only presses against the heating component 42 during sealing, which helps the heating component 42 to dissipate heat and improves the ability of the vacuum sealer to work continuously.

[0042] Specifically, the air pump mechanism includes an inflation pump 31, an exhaust pump 32, an exhaust pipe group 34 and an inflation pipe group 33. The inflation pump 31 and the exhaust pump 32 are both arranged in the lower seat 2. The air outlet interface of the inflation pump 31 is connected to the inflation pipe group 33, the inflation pipe group 33 is connected to the pressure bag airbag 41, the air inlet interface of the exhaust pump 32 is connected to the exhaust pipe group 34, the exhaust pipe group 34 is connected to the vacuum tank 21, the pressure relief pipe 51 of the first pressure relief mechanism 5 is connected to the inflation pipe group 33, and the pressure relief pipe 51 of the second pressure relief mechanism 5 is connected to the exhaust pipe group 34. When sealing, the pressure bag airbag 41 is inflated by the air pump 31, and when vacuuming, the vacuuming groove 21 is vacuumed by the air pump 32. The air pumping and the air filling are operated independently, and the vacuuming groove 21 can be continuously evacuated while sealing to improve the vacuum degree; preferably, two air pumps 32 are provided to further improve the vacuuming speed and vacuum degree. The vacuuming groove 21 and the pressure bag airbag 41 are depressurized by two pressure relief mechanisms 5, respectively, so as to facilitate the separation of the upper cover 1 and the lower seat 2.

[0043] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The contents of this specification should not be understood as limiting the present invention.

Claims

1. A vacuum sealer for improving pressure relief sealing performance, comprising an upper cover (1), a lower seat (2), an air pump mechanism and a heat sealing mechanism, wherein the upper cover (1) is rotatably mounted on the upper part of the lower seat (2), a vacuum groove (21) is arranged at the front of the lower seat (2), the air pump mechanism is arranged in the lower seat (2), the heat sealing mechanism is arranged at the front side of the vacuum groove (21), the air pump mechanism is connected to the vacuum groove (21) and / or the heat sealing mechanism, and is characterized in that: The air pump mechanism is connected to a pressure relief mechanism (5), the pressure relief mechanism (5) comprising a pressure relief pipe (51), a pressure relief seat (52), a pressure relief drive assembly and a pressure relief rubber plug (53), the pressure relief drive assembly being in driving connection with the pressure relief seat (52) or the pressure relief rubber plug (53), the pressure relief seat (52) and the pressure relief rubber plug (53) moving towards and away from each other, the pressure relief seat (52) being provided with a sealing groove (521) opening towards the pressure relief rubber plug (53), the bottom of the sealing groove (521) being provided with a pressure relief port (522), the pressure relief port (522) being connected to the pressure relief pipe (51), the pressure relief pipe (51) being connected to the air pump mechanism, the inner diameter of the pressure relief port (522) being smaller than the inner diameter of the sealing groove (521), the pressure relief rubber plug (53) being inserted into the sealing groove (521) and abutting against the bottom of the sealing groove (521) to seal the pressure relief port (522).

2. A vacuum sealer for improving pressure relief sealing according to claim 1, characterized in that: At least one pressure relief groove (523) is provided on the inner wall of the sealing groove (521) along the length direction of the pressure relief rubber plug (53); the outer end of the pressure relief groove (523) extends to the opening of the sealing groove (521) and is connected to the atmosphere; when pressure is released, the pressure relief rubber plug (53) is located in the sealing groove (521) and a pressure relief gap (54) is provided between the pressure relief rubber plug (53) and the bottom of the sealing groove (521); the pressure relief groove (523), the pressure relief gap (54) and the pressure relief port (522) are connected to form a pressure relief channel.

3. A vacuum sealer for improving pressure relief sealing according to claim 2, characterized in that: The pressure relief rubber plug (53) comprises an integrally formed sealing portion (531), a fixing portion (532) and a limiting portion (533); the fixing portion (532) is formed between the sealing portion (531) and the limiting portion (533); the sealing portion (531) is slidably mounted in the sealing groove (521); the first end of the sealing portion (531) is integrally formed with the fixing portion (532); the second end of the sealing portion (531) is abutted against the bottom of the sealing groove (521); the side wall of the sealing portion (531) is abutted against the inner wall of the sealing groove (521); and the fixing portion (532) is fixedly mounted on the lower seat (2) or is drivingly connected to the pressure relief drive assembly.

4. A vacuum sealer for improving pressure relief sealing according to claim 3, characterized in that: A hemispherical groove (524) is provided at the bottom of the sealing groove (521), and a hemispherical convex block (534) is correspondingly provided at the second end of the sealing portion (531), and the convex block (534) is seamlessly embedded and connected with the groove (524).

5. The vacuum sealer for improving pressure relief sealing according to claim 3, characterized in that: The outer diameters of the sealing portion (531) and the limiting portion (533) are both larger than the outer diameter of the fixing portion (532); the fixing portion (532) is clamped with a fixing seat (23); the sealing portion (531) and the limiting portion (533) respectively abut against two sides of the fixing seat (23); the fixing seat (23) is fixedly connected or molded to the lower seat (2); and the pressure relief seat (52) is drivingly connected to the pressure relief drive assembly.

6. A vacuum sealer with improved pressure relief sealing performance according to any one of claims 1 to 5, characterized in that: The lower seat (2) is provided with a cover locking mechanism (6), the pressure relief drive assembly is the cover locking mechanism (6), the cover locking mechanism (6) comprises a cover locking slider and a return spring (64), the cover locking slider is slidably installed in the lower seat (2), the outer end of the cover locking slider protrudes from the lower seat (2), and the return spring (64) is arranged between the cover locking slider and the lower seat (2) to realize the outward return of the cover locking slider; The pressure relief rubber plug (53) or the pressure relief seat (52) is fixedly mounted on the locking cover slider, the left and right sides of the upper cover (1) are respectively provided with a clamping block (11), the upper part of the lower seat (2) is provided with a through hole (22), and the clamping block (11) passes through the through hole (22) and is buckled and connected with the locking cover slider.

7. A vacuum sealer for improving pressure relief sealing according to claim 6, characterized in that: A locking cover mechanism (6) is respectively arranged on the left and right sides of the lower seat (2); the air pump mechanism is connected to two of the pressure relief mechanisms (5); each locking cover mechanism (6) comprises an unlocking button (61), a locking plate (62) and a spring fixing column (63); the locking plate (62) is slidably installed in the lower seat (2); the unlocking button (61) is formed at the outer end of the locking plate (62) and protrudes from the outer side surface of the lower seat (2); the spring fixing column (63) is formed at the inner end of the locking plate (62); the reset spring (64) is sleeved on the spring fixing column (63); the locking plate (62) is provided with a locking hole (621); the inner wall of the locking hole (621) is provided with a clamping foot (622); a clamping groove (111) is provided on one side of the clamping block (11); the clamping foot (622) is clamped and connected with the clamping groove (111).

8. A vacuum sealer for improving pressure relief sealing according to claim 7, characterized in that: The pressure relief seat (52) is provided with a connecting column (525), the pressure relief port (522) passes through the connecting column (525), the outer end of the connecting column (525) is provided with a guiding bevel (526), ​​the connecting column (525) is inserted into the pressure relief pipe (51), the outer edge of the sealing groove (521) is provided with a connecting plate (527), the connecting plate (527) is formed on the inner end of the locking plate (62), and the opening of the sealing groove (521) faces the unlocking button (61).

9. The vacuum sealer for improving pressure relief sealing according to claim 7, characterized in that: The heat sealing mechanism comprises a bag pressing component and a heating component (42). The heating component (42) is fixedly mounted on the front of the lower seat (2) and is located on the front side of the vacuum groove (21). The bag pressing component is fixedly mounted on the front of the upper cover (1). The bag pressing component is provided with a bag pressing airbag (41). The bag pressing airbag (41) and the heating component (42) move relative to each other and are pressed together. The bag pressing airbag (41) and the vacuum groove (21) are respectively connected to the air pump mechanism.

10. A vacuum sealer for improving pressure relief sealing according to claim 9, characterized in that: The air pump mechanism comprises an air pump (31), an air extraction pump (32), an air extraction pipe group (34) and an air filling pipe group (33). The air pump (31) and the air extraction pump (32) are both arranged in the lower seat (2). The air outlet interface of the air pump (31) is connected to the air filling pipe group (33), the air filling pipe group (33) is connected to the pressure bag airbag (41), the air inlet interface of the air extraction pump (32) is connected to the air extraction pipe group (34), the air extraction pipe group (34) is connected to the vacuum tank (21), the pressure relief pipe (51) of the first pressure relief mechanism (5) is connected to the air filling pipe group (33), and the pressure relief pipe (51) of the second pressure relief mechanism (5) is connected to the air extraction pipe group (34).

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