CN216154436U - Air valve and vacuum compression bag - Google Patents

Abstract

The utility model discloses an air valve and a vacuum compression bag, the air valve comprises: the valve seat is provided with an air inlet channel and an air outlet channel which are mutually independent; the exhaust valve core is movably arranged on the valve seat and can block or open an exhaust channel; the air inlet valve core is arranged on the valve seat and can block or open an air inlet channel; the valve cover is arranged on the valve seat through a locking mechanism, and the locking mechanism is configured to drive the valve cover to ascend or descend relative to the valve seat and then fix the valve cover; the locking mechanism can drive the exhaust valve core to move downwards to block the exhaust channel. The air valve realizes mutual independence of air exhaust and air inflation, can keep the tightness of the air inlet channel in the air exhaust process and the tightness of the air exhaust channel in the air inflation process, ensures the purity of air in the inflated bag body, and ensures the storage effect of articles. The vacuum compression bag is provided with the air valve, has the functions of exhausting and inflating, and ensures the air tightness when the exhausting or inflating is switched, thereby ensuring the storage effect of the vacuum compression bag.

Description

Air valve and vacuum compression bag

Technical Field

The utility model relates to the technical field of articles for daily use, in particular to an air valve and a vacuum compression bag.

Background

At present, in the house storage industry, the gas valves on the market are all single structures for discharging gas from the bags, but some products, such as files, cultural relics, food and the like, need not only to vacuumize the bags, but also to fill ozone, nitrogen and the like into the bags for protection. Air valves which utilize a single channel to realize air suction and inflation functions appear in the market, and the air valves cannot keep tightness when being switched to an inflation state, so that partial air or oxygen enters the bags in advance, and the function of storing articles in the bags is influenced.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, one of the purposes of the utility model is to provide a gas valve which can meet the functions of air suction and air inflation, and can maintain the tightness of an air inlet channel in the air exhaust process and the tightness of an air outlet channel in the air inflation process; the second purpose is to provide a vacuum compression bag with the gas valve, and the gas in the inflated bag body can be ensured to have high purity, and the storage effect of articles can be ensured.

An air valve according to an embodiment of the first aspect of the utility model comprises: the valve seat is provided with an air inlet channel and an air outlet channel which are mutually independent; the exhaust valve core is movably arranged on the valve seat and can block or open the exhaust channel; the air inlet valve core is arranged on the valve seat and can seal or open the air inlet channel; the valve cover is arranged on the valve seat through a locking mechanism, and the locking mechanism is configured to drive the valve cover to ascend or descend relative to the valve seat and then fix the valve cover; the locking mechanism can drive the exhaust valve core to move downwards to block the exhaust channel.

The gas valve provided by the embodiment of the utility model at least has the following beneficial effects:

the air valve with the structure is characterized in that the valve body is provided with the air inlet channel and the air outlet channel which are mutually independent so as to realize the functions of inflation and air outlet, when air is exhausted, the locking mechanism is configured to drive the valve seat to rise and then be fixed, the air in the bag body pushes the air outlet valve core open and is exhausted from the air outlet channel, and meanwhile, the air inlet valve core keeps plugging the air inlet channel; when the bag is inflated, the locking mechanism is configured to drive the valve seat to descend and then to be fixed, the locking mechanism drives the exhaust valve core to move downwards to keep blocking the exhaust channel, and gas pushes the gas inlet valve core away and enters the bag body from the gas inlet channel, so that the mutual independence of exhaust and inflation is realized, the tightness of the gas inlet channel can be kept in the exhaust process, the tightness of the exhaust channel can be kept in the inflation process, the purity of the gas in the inflated bag body is guaranteed, and the storage effect of articles is guaranteed.

In some embodiments of the utility model, the valve cover is provided with an exhaust port, and an exhaust cavity is defined between the valve cover and the valve seat and can communicate the exhaust port with the exhaust channel, and at least part of the air inlet channel is positioned in the exhaust cavity. The air valve can realize the functions of exhausting and inflating only by adding the air inlet channel on the structure of the traditional valve body, is convenient to produce and manufacture, and can not increase the contour size of the valve body.

In some embodiments of the utility model, the valve cover is provided with an exhaust abdicating hole, the air inlet channel upwardly penetrates through the exhaust abdicating hole, and an insertion gap for inserting the air inlet pipe is formed between the air inlet channel and the exhaust abdicating hole. The cartridge clearance has the fixed effect in location to aerating device's intake pipe, makes things convenient for the intake pipe to aim at inlet channel and realizes pegging graft, and inlet channel can not lead to the fact the hindrance to the lift of valve gap moreover yet.

In some embodiments of the present invention, the air inlet valve core includes a first piston rod and a first sealing plug connected to the first piston rod, the first piston rod is movably disposed through the air inlet channel, a first ventilation gap is formed between the first piston rod and the air inlet channel, and the first sealing plug is connected to an elastic member for urging the first sealing plug against an end of the air inlet channel. The first piston rod has a guiding effect on the movement of the air inlet valve core, the air inlet valve core is prevented from generating large deviation along the radial direction of the air inlet channel, the air inlet channel can be stably opened or closed by the air inlet valve core, and the elastic piece acts on the first sealing plug to enable the air inlet valve core to keep closing the air inlet channel during air exhaust.

In some embodiments of the present invention, in order to implement the installation of the intake valve core and the elastic member and implement the communication of the intake channel, a mounting cover is disposed at the lower part of the valve seat, a communication hole corresponding to the intake channel is disposed on the mounting cover, a first movable chamber capable of communicating the communication hole and the intake channel is defined between the mounting cover and the valve seat, the intake valve core is located in the first movable chamber, and the elastic member abuts between the mounting cover and the intake valve core.

In some embodiments of the present invention, a sealing skirt is disposed on the air inlet valve core, and the sealing skirt can elastically abut against the lower end of the air inlet channel to seal the air inlet channel, or the sealing skirt can elastically deform to open the air inlet channel. The air inlet valve core does not need to be provided with an elastic piece to plug the air inlet channel, so that the structure of the air valve is simplified.

In some embodiments of the present invention, a mounting cover is disposed at a lower portion of the valve seat, a communication hole capable of communicating with the intake channel is disposed on the mounting cover, a mounting cavity is defined between the mounting cover and the valve seat, the intake valve core is located in the mounting cavity and clamped between the mounting cover and the valve seat, and a default portion for communicating the mounting cavity and the communication hole is disposed at a bottom of the intake valve core. When the air inlet channel is opened, the air enters the bag body through the installation cavity, the default part and the communication hole.

In some embodiments of the present invention, in order to increase a contact area between the gas and the sealing skirt so that the gas inlet passage can be smoothly opened when inflated, a lower end of the gas inlet passage has a flared portion facing an upper surface of the sealing skirt.

In some embodiments of the present invention, the locking mechanism includes a first locking groove and a second locking groove that are arranged at intervals in a height direction, and a locking portion that is engaged with the first locking groove or the second locking groove, the locking portion is arranged on one of the valve cover and the valve seat, and the first locking groove and the second locking groove are both arranged on the other of the valve cover and the valve seat. The locking mechanism can be conveniently switched to two states of fixing the valve cover after the valve cover rises relative to the valve seat and fixing the valve cover after the valve cover falls relative to the valve seat.

The embodiment of the second aspect of the utility model discloses a vacuum compression bag, which comprises a bag body, wherein the air valve is arranged on the bag body. This vacuum compression bag has exhaust and gas filled function, can guarantee the internal gas tightness of bag when exhausting, and the guarantee is aerifyd the purity of the internal gas of bag high, and is better to the storage effect of article.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic view of an internal cross-section of one embodiment of a gas valve of the present invention;

FIG. 2 is an exploded view of the embodiment of FIG. 1;

fig. 3 is a schematic internal cross-sectional view of another embodiment of the gas valve of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the positional or orientational descriptions referred to, for example, the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., are based on the positional or orientational relationships shown in the drawings and are for convenience of description and simplicity of description only, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 and 2, the gas valve of the present invention comprises: a valve seat 110, the valve seat 110 being provided with an intake passage 101 and an exhaust passage 102 independent of each other; the exhaust valve core 200 is movably arranged on the valve seat 110 and can block or open the exhaust channel 102; the air inlet valve core 300 is arranged on the valve seat 110 and can seal or open the air inlet channel 101; a valve cover 120, wherein the valve cover 120 is disposed on the valve seat 110 through a locking mechanism 600, and the locking mechanism 600 is configured to drive the valve cover 120 to ascend or descend relative to the valve seat 110 and then fix the valve cover 120; the locking mechanism 600 can drive the exhaust valve core 200 to move downwards to block the exhaust passage 102.

In the air valve with the structure, the valve body is provided with the air inlet channel and the air outlet channel which are independent of each other so as to realize the functions of inflation and air outlet, when air is exhausted, the locking mechanism 600 is configured to drive the valve seat 110 to rise and then be fixed, the air in the bag body pushes the air outlet valve core 200 away and is exhausted from the air outlet channel 102, and meanwhile, the air inlet valve core 300 keeps blocking the air inlet channel 101; when the bag is inflated, the locking mechanism 600 is configured to drive the valve seat 110 to descend and then fix, the locking mechanism 600 drives the exhaust valve core 200 to move downwards to keep blocking the exhaust channel 102, and gas pushes away the gas inlet valve core 300 and enters the bag body from the gas inlet channel 101, so that the mutual independence of exhaust and inflation is realized, the tightness of the gas inlet channel 101 and the tightness of the exhaust channel 102 can be kept in the exhaust process and the inflation process, the purity of the gas in the inflated bag body is guaranteed, and the storage effect of articles is guaranteed. For example, when nitrogen is filled into the bag body to protect files, air is not easy to be mixed.

Referring to fig. 1 and 2, in some embodiments of the present invention, the valve body 100 includes a valve seat 110 and a valve cover 120 disposed on the valve seat 110, the valve cover 120 is provided with an exhaust port 121, an exhaust cavity 103 is defined between the valve cover 120 and the valve seat 110, the exhaust cavity 103 can communicate the exhaust port 121 with the exhaust passage 102, at least a portion of the intake passage 101 is located in the exhaust cavity 103, and an intake port of the intake passage 101 is communicated with the exhaust cavity 103. The air valve is convenient to produce and manufacture only by additionally arranging the air inlet channel 101 on the structure of the traditional valve body 100, and the outline size of the valve body 100 cannot be increased.

Referring to fig. 1 and 2, in some embodiments of the present invention, the valve cover 120 is provided with an air outlet relief hole 122, the air inlet channel 101 upwardly penetrates through the air outlet relief hole 122, and an insertion gap for inserting an air inlet pipe is formed between the air inlet channel 101 and the air outlet relief hole 122. The insertion gap has a positioning and fixing function on an air inlet pipe of the inflation device, and the upper end of the air inlet passage 101 slightly protrudes out of the upper surface of the valve cover 120 so as to facilitate the air inlet pipe to be aligned with the air inlet passage 101 for realizing insertion. It should be noted that the whole of the intake passage 101 located in the exhaust chamber 103 can also perform the corresponding exhaust and inflation functions, wherein the exhaust relief hole 122 functions in the exhaust process in accordance with the exhaust port 121.

In some embodiments of the present invention, the air inlet valve core 300 includes a first piston rod 310 and a first sealing plug 320 connected to the first piston rod 310, the first piston rod 310 is movably disposed through the air inlet channel 101, a first ventilation gap is formed between the first piston rod 310 and the air inlet channel 101, and the first sealing plug 320 is connected to an elastic member 400 for urging the first sealing plug to abut against an end of the air inlet channel 101. The first piston rod 310 has a guiding function on the movement of the air inlet valve core 300, so that the air inlet valve core 300 is prevented from generating large deviation along the radial direction of the air inlet channel 101, the air inlet channel 101 can be stably opened or closed by the air inlet valve core 300, the elastic piece 400 acts on the first sealing plug 320, so that the air inlet valve core 300 can also keep closing the air inlet channel 101 during air exhaust, and when the air inlet valve core 300 opens the air inlet channel 101, air can enter the bag body through the first ventilation gap.

Referring to fig. 1, when the inflator is inflated, an intake pipe of the inflator is connected to an upper end of the intake passage 101, and the charged gas overcomes the elastic member 400 to move the intake valve 300 away from a lower end of the intake passage 101, thereby communicating with the intake passage 101. After the charging is finished, or during the discharging, the intake valve core 300 is pressed against the lower end of the intake passage 101 by the elastic member 400, so as to close the intake passage 101. It is understood that in some embodiments, the resilient member 400 is a spring, and the spring constant of the spring can be selected according to the magnitude of the intake pressure. It should be noted that the elastic force of the elastic member 400 can ensure that the intake valve core 300 keeps sealing the intake passage 101 in the exhaust state, that is, the elastic force of the elastic member 400 can be larger than the force of the atmospheric pressure acting on the intake valve core 300.

Referring to fig. 1, in some embodiments of the present invention, in order to increase a contact area between gas and the first sealing plug 320 so that the gas inlet passage 101 can be smoothly opened when inflated, the lower end of the gas inlet passage 101 has a flared portion 1011, and the flared portion 1011 faces the upper surface of the first sealing plug 320.

Referring to fig. 1 and 2, in some embodiments of the present invention, a mounting cover 500 is disposed at a lower portion of the valve seat 110, a communication hole 510 corresponding to the intake passage 101 is disposed on the mounting cover 500, a first movable chamber 501 capable of communicating the communication hole 510 and the intake passage 101 is defined between the mounting cover 500 and the valve seat 110, the intake valve core 300 is disposed in the first movable chamber 501, and the elastic member 400 abuts between the mounting cover 500 and the intake valve core 300. When inflating, the gas impacts the inlet valve member 300 downward, and the inlet valve member 300 moves downward in the first movable chamber 501 to compress the elastic member 400, thereby communicating the communication hole 510, the first movable chamber 501, and the inlet passage 101. It is understood that, in order to facilitate the assembly of the inlet valve core 300, the elastic member 400 and the mounting cap 500, the mounting cap 500 and the valve seat 110 are detachably connected by a snap structure or a screw structure.

Referring to fig. 1 and 2, in some embodiments of the present invention, in order to prevent the air inlet valve core 300 from blocking the communication hole 510 when the air inlet valve core abuts against the inner bottom surface of the mounting cover 500 downward, and ensure the implementation of the inflation function, a plurality of protrusions 520 surrounding the communication hole 510 and capable of abutting against the bottom of the air inlet valve core 300 are disposed on the inner bottom surface of the mounting cover 500, and air inlet gaps respectively communicating the first movable chamber 501 and the communication hole 510 are disposed between adjacent protrusions 520.

Referring to fig. 3, in some embodiments of the present invention, a sealing skirt 330 is disposed on the intake valve core 300, and the sealing skirt 330 can elastically abut against the lower end of the intake passage 101 to close the intake passage 101, or the sealing skirt 330 can elastically deform to open the intake passage 101. It should be noted that the sealing skirt 330 on the air inlet valve core 300 has a tendency of recovering elastic deformation toward the lower end of the air inlet passage 101, so that, in a natural state, the sealing skirt 330 can elastically abut against the lower end of the exhaust passage 102 to block the air inlet passage 101; when the gas is filled in the gas inlet channel 101, the gas acts on the sealing skirt 330 to make the sealing skirt 330 far away from the lower end of the gas inlet channel 101, so as to open the gas inlet channel 101, and when the gas is filled, the sealing skirt 330 closes the gas inlet channel 101 again under the action of the self elastic restoring force. In the process of opening or closing the air inlet channel 101, only the sealing skirt 330 deforms, the main body of the air inlet valve core 300 does not move relative to the valve body 100, and the air inlet valve core 300 does not need to be provided with the elastic piece 400 to open or close the air inlet channel 101, so that the structure of the air valve is simplified. It should be noted that the self elastic restoring force of the sealing skirt 330 can ensure that the air inlet valve core 300 keeps sealing the air inlet channel 101 in the air exhaust state, and the self elastic restoring force of the sealing skirt 330 is larger than the force of the atmospheric pressure acting on the air inlet valve core 300.

Referring to fig. 3, in some embodiments of the present invention, in order to mount the air inlet valve core 300 with the sealing skirt 330, a mounting cover 500 is disposed at a lower portion of the valve seat 110, a communication hole 510 capable of communicating with the air inlet passage 101 is disposed on the mounting cover 500, a mounting cavity 502 is defined between the mounting cover 500 and the valve seat 110, the air inlet valve core 300 is disposed in the mounting cavity 502 and sandwiched between the mounting cover 500 and the valve seat 110, and a default portion 340 for communicating the mounting cavity 502 and the communication hole 510 is disposed at a bottom portion of the air inlet valve core 300. It should be noted that the mounting chamber 502 has a space for the sealing skirt 330 to deform downward, and when the gas inlet passage 101 is opened, the gas enters the bag body through the mounting chamber 502, the default part 340 and the communication hole 510.

Referring to fig. 3, in some embodiments of the present invention, in order to increase the contact area between the gas and the sealing skirt 330 so that the gas inlet passage 101 can be smoothly opened during inflation, the lower end of the gas inlet passage 101 has a flared portion 1011, and the flared portion 1011 faces the sealing skirt 330 or the upper surface of the first sealing plug 320.

Referring to fig. 2 or 3, in some embodiments of the present invention, a plurality of limit stoppers 530 are distributed on the inner bottom circumference of the mounting cover 500, and the limit stoppers 530 are located on the outer circumference of the intake valve core 300. The limit stop 530 helps prevent the inlet valve element 300 from shifting relative to the mounting cap 500, and helps to ensure the sealing skirt 330 seals the inlet passage 101.

Referring to fig. 1 and 3, in some embodiments of the present invention, the valve cover 120 is disposed on the valve seat 110 via a locking mechanism 600, and the locking mechanism 600 is configured to drive the valve cover 120 to be fixed after being lifted or lowered relative to the valve seat 110. It can be understood that when the locking mechanism 600 makes the valve cover 120 rise relative to the valve seat 110 and then fix, the air vent valve core 200 can move upwards to open the air vent channel 102, and when the descending fixing structure makes the valve cover 120 descend relative to the valve seat 110 and then fix, the valve cover 120 presses downwards against the air vent valve core 200 to close the air vent channel 102, when air is input from the air inlet channel 101, the air in the bag body does not leak outwards from the air vent channel 102, and the problem that the air in the bag body increases to cause air leakage of the air vent channel 102 along with the increase of the amount of the filled air during air inflation can be solved.

Referring to fig. 1, in some embodiments of the present invention, the vent valve cartridge 200 includes a second piston rod 210 movably disposed in the vent channel 102 and a second sealing plug 220 connected to an upper end of the second piston rod 210, a second vent gap is formed between the second piston rod 210 and the vent channel 102, and the locking mechanism 600 can press the second sealing plug 220 downward against an end of the vent channel 102. The second piston rod 210 has a guiding function on the movement of the exhaust valve core 200, so that the exhaust valve core 200 is prevented from generating large offset along the radial direction of the exhaust channel 102, the exhaust channel 102 can be stably opened or closed by the exhaust valve core 200, and when the exhaust channel 102 is opened by the exhaust valve core 200, gas can enter the bag body through the second vent gap.

Referring to fig. 3, in some embodiments of the present invention, in order to make the exhaust valve core 200 have a better sealing effect on the exhaust passage 102, the upper end edge of the exhaust passage 102 has a ring of sealing ring 1021, and the lower end surface of the second sealing plug 220 deforms to some extent when abutting against the sealing ring, so that the lower end surface of the second sealing plug 220 abuts against the sealing ring and the surface of the valve seat 110 outside the sealing ring.

Referring to fig. 3, in some embodiments of the present invention, the locking mechanism 600 includes a first locking groove 610 and a second locking groove 620 that are spaced apart in a height direction, and a locking portion 630 that is engaged with the first locking groove 610 or the second locking groove 620, wherein the locking portion 630 is disposed on one of the valve cover 120 and the valve seat 110, and the first locking groove 610 and the second locking groove 620 are disposed on the other of the valve cover 120 and the valve seat 110. In some embodiments, the first locking groove 610 and the second locking groove 620 are disposed on the valve seat 110, the second locking groove 620 is located above the first locking groove 610, the locking part 630 is disposed on the valve cover 120, when the locking part 630 is installed in the first locking groove 610, the valve cover 120 presses the air release valve core 200 down to block the air release passage 102, when the locking part 630 is installed in the second locking groove 620, the air release valve core 200 has a height space moving upward, when the air in the bag is released, the air can jack up the air release valve core 200 and then be released from the air release port 121. With the above locking mechanism 600, it is possible to easily switch between two states, i.e., the state in which the valve cover 120 is fixed after being lifted relative to the valve seat 110 and the state in which the valve cover 120 is fixed after being lifted relative to the valve seat 110.

Referring to fig. 3, in some embodiments of the present invention, in order to prevent dust from falling into the air inlet passage 101 and entering into the bag body during inflation, a dust cap 700 for sealing the air inlet of the air inlet passage 101 is detachably mounted on the valve seat 110. When inflated, the dust cover 700 is removed, and when not inflated, the dust cover 700 is attached. In some embodiments, the dust cap 700 is made of a plastic material, the dust cap 700 may allow a certain deformation, and the inner wall of the dust cap 700 is tightly fitted with the outer wall of the air inlet channel 101 to achieve the assembling and disassembling.

The utility model also discloses a vacuum compression bag which comprises a bag body, wherein the air valve is arranged on the bag body. The vacuum compression bag can perform air exhaust and vacuum pumping by utilizing the matching of the air exhaust valve core 200 and the air exhaust channel 102, and maintain the vacuum degree, and then the bag body in the vacuum state is filled with gas which can realize the protection function to the article through the matching of the air inlet valve core 300 and the air inlet channel 101, and the like, and in the process of switching to air inflation after air exhaust, the external air can not enter the bag body, and the air inlet channel 101 and the air exhaust channel 102 are mutually independent. Moreover, when at least part of the air inlet channel 101 is positioned in the exhaust cavity 103, the air valve only needs to add the air inlet channel 101 on the structure of the traditional valve body 100, the outline size of the valve body 100 cannot be increased, and the production and the manufacture of the vacuum compression bag are convenient.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

While embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A gas valve, comprising:

the valve seat (110), the said valve seat (110) has independent air intake passage (101) and air exhaust passage (102);

the exhaust valve core (200) is movably arranged on the valve seat (110) and can seal or open the exhaust channel (102);

the air inlet valve core (300) is arranged on the valve seat (110) and can seal or open the air inlet channel (101);

a valve cover (120), wherein the valve cover (120) is arranged on the valve seat (110) through a locking mechanism (600), and the locking mechanism (600) is configured to drive the valve cover (120) to ascend or descend relative to the valve seat (110) and then fix the valve cover (120);

the locking mechanism (600) can drive the exhaust valve core (200) to move downwards to block the exhaust channel (102).

2. A gas valve as claimed in claim 1, characterized in that:

the valve cover (120) is provided with an exhaust port (121), an exhaust cavity (103) is defined between the valve cover (120) and the valve seat (110), the exhaust cavity (103) can communicate the exhaust port (121) with the exhaust channel (102), and at least part of the air inlet channel (101) is positioned in the exhaust cavity (103).

3. A gas valve as claimed in claim 2, characterized in that:

be equipped with on valve gap (120) the exhaust hole of stepping down (122), inlet channel (101) upwards wear to locate the exhaust hole of stepping down (122), inlet channel (101) with it supplies intake pipe male cartridge clearance to have between exhaust hole of stepping down (122).

4. A gas valve as claimed in claim 1, characterized in that:

the air inlet valve core (300) comprises a first piston rod (310) and a first sealing plug (320) connected with the first piston rod (310), the first piston rod (310) is movably arranged in the air inlet channel (101) in a penetrating mode, a first ventilation gap is formed between the first piston rod (310) and the air inlet channel (101), and the first sealing plug (320) is connected with an elastic piece (400) which drives the first sealing plug to abut against the end portion of the air inlet channel (101).

5. The gas valve as set forth in claim 4, characterized in that:

the air inlet valve comprises a valve seat (110), and is characterized in that a mounting cover (500) is arranged at the lower part of the valve seat (110), a communication hole (510) corresponding to the air inlet channel (101) is formed in the mounting cover (500), a first movable cavity (501) capable of communicating the communication hole (510) with the air inlet channel (101) is defined between the mounting cover (500) and the valve seat (110), the air inlet valve core (300) is positioned in the first movable cavity (501), and the elastic piece (400) is abutted between the mounting cover (500) and the air inlet valve core (300).

6. A gas valve as claimed in claim 1, characterized in that:

the air inlet valve core (300) is provided with a sealing skirt (330), the sealing skirt (330) can be elastically abutted against the lower end of the air inlet channel (101) to seal the air inlet channel (101), or the sealing skirt (330) can be elastically deformed to open the air inlet channel (101).

7. The gas valve as recited in claim 6, further comprising:

the air inlet valve comprises a valve seat (110), and is characterized in that a mounting cover (500) is arranged at the lower part of the valve seat (110), a communicating hole (510) capable of being communicated with an air inlet channel (101) is formed in the mounting cover (500), a mounting cavity (502) is defined between the mounting cover (500) and the valve seat (110), an air inlet valve core (300) is positioned in the mounting cavity (502) and clamped between the mounting cover (500) and the valve seat (110), and a default part (340) for communicating the mounting cavity (502) and the communicating hole (510) is arranged at the bottom of the air inlet valve core (300).

8. The gas valve as recited in claim 6, further comprising:

the lower end of the air inlet channel (101) is provided with a flared part (1011), and the flared part (1011) faces the upper surface of the sealing skirt (330).

9. A gas valve as claimed in claim 1, characterized in that:

the locking mechanism (600) comprises a first clamping groove (610) and a second clamping groove (620) which are distributed at intervals in the height direction, and a clamping part (630) matched with the first clamping groove (610) or the second clamping groove (620), wherein the clamping part (630) is arranged on one of the valve cover (120) and the valve seat (110), and the first clamping groove (610) and the second clamping groove (620) are arranged on the other of the valve cover (120) and the valve seat (110).

10. Vacuum compression bag, characterized in that it comprises a bag body provided with a gas valve according to any one of claims 1-9.

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