Pressure release valve assembly, atomization device and electronic atomizer

Abstract

The invention discloses a pressure release valve assembly, an atomization device and an electronic atomizer. The pressure release valve assembly comprises a mounting cylinder, a movable cylinder, a fixed cylinder, an elastic piece and a limiting structure. Two ends of the mounting cylinder are open; the movable cylinder and the fixed cylinder are coaxial and are sleeved with the two ends of the mounting cylinder in a sealed mode, the movable cylinder comprises an open end and a sealed end, the open end is close to the extending tail end of the mounting cylinder and used for being communicated with a liquid storage cavity of the atomization device, and first vent holes are formed in the peripheral wall of the movable cylinder; the movable cylinder is movably connected with the mounting cylinder and can move towards the middle of the mounting cylinder so that the first vent hole can communicate with an inner cavity of the mounting cylinder. Second vent holes communicated with the inner cavity of the mounting cylinder are formed in the peripheral wall of the fixed cylinder; the elastic piece is used for driving the movable cylinder to move away from the fixed cylinder to seal the first vent hole by the inner wall of the mounting cylinder; the limiting structure is used for limiting the movable cylinder to move away from the fixed cylinder. The pressure relief valve assembly can achieve a good pressure relief effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of atomization, in particular to a pressure relief valve assembly, an atomization device and an electronic atomizer. BACKGROUND

[0002] The air pressure in the atomization device of the electronic atomizer is prone to imbalance. When the atomization core in the atomization device works, not only will the air in the liquid storage cavity of the atomization device expand due to heating, but also the atomization substrate will produce gas with a volume of hundreds of times its liquid volume. However, the liquid storage cavity is a semi-closed structure, and the gas cannot be discharged in time to form high pressure. The high-pressure gas will squeeze the atomization substrate to break through the adsorption limit of the liquid guide cotton, and overflow from the air inlet hole, the suction nozzle or the sealing gap.

[0003] The current mainstream single air vent hole pressure relief design is essentially a passive straight-through exhaust, lacking dynamic adjustment capability. The exhaust efficiency of the air vent hole is determined only by the size of the hole diameter, and the exhaust volume cannot be adjusted according to the pressure change in the liquid storage cavity. The air vent hole is directly connected to the atomization cavity and the external environment without an intermediate buffer structure. When the cavity pressure rises instantaneously, the high-speed airflow directly impacts the air vent hole, which can easily cause liquid leakage.

[0004] Although there are many liquid regulating valve structures in the prior art, the structure design of the liquid regulating valve is not suitable for air pressure regulation. The liquid regulating valve is a linear adjustment target that needs to be manually operated by the user, and the adjustment process is controllable and predictable. However, the pressure relief valve is passive and threshold triggered, which needs to be automatically opened when the cavity pressure reaches a critical value, and automatically closed when the pressure drops to a safe value. The entire process does not require user intervention and needs to have instantaneous response capability. In addition, to prevent leakage of the atomization substrate, the liquid regulating valve usually uses a multi-segment sealing structure, and the smoothness of the inner wall of the channel is required to be very high to reduce liquid residue. If this design is used for exhaust, the sealing structure will hinder the flow of gas, and the smooth inner wall cannot buffer the high-speed airflow, which can easily cause liquid exhaust. SUMMARY

[0005] The main purpose of the present application is to provide a pressure relief valve assembly, an atomization device and an electronic atomizer, which solves the technical problem of poor pressure relief effect of the existing single air vent hole.

[0006] To achieve the above purpose, the first aspect of the present application provides a pressure relief valve assembly, which comprises:

[0007] The mounting cylinder is open at both ends.

[0008] A movable cylinder coaxially and sealingly sleeved in one end of the mounting cylinder, the movable cylinder comprising an open end and a closed end, the open end being close to the extended end of the mounting cylinder for communicating with the liquid storage cavity, a first air passage being formed in the peripheral wall of the movable cylinder, the movable cylinder being movably connected with the mounting cylinder, the movable cylinder being capable of moving towards the middle part of the mounting cylinder under the pushing of the gas in the liquid storage cavity to make the first air passage communicate with the inner cavity of the mounting cylinder;

[0009] A fixed cylinder coaxially and sealingly sleeved in the other end of the mounting cylinder, the fixed cylinder being fixedly connected with the mounting cylinder, both ends of the fixed cylinder being open, a second air passage being formed in the peripheral wall of the fixed cylinder, the second air passage communicating with the inner cavity of the mounting cylinder;

[0010] An elastic member connected with the movable cylinder, the elastic member being used to drive the movable cylinder to move away from the fixed cylinder to make the first air passage be closed by the inner wall of the mounting cylinder; and

[0011] A limiting structure used to limit the movable cylinder to move away from the fixed cylinder.

[0012] Optionally, the movable cylinder is capable of closing the fixed cylinder through the closed end under the pushing of the gas in the liquid storage cavity, the end face of the closed end being a tapered face.

[0013] Optionally, the mounting cylinder is fusion welded with a liquid-blocking air passage film close to one end of the open end.

[0014] Optionally, the outer wall of the closed end extends outward to form an abutting boss, the limiting structure comprising the abutting boss, the abutting boss being used to abut against the inner wall of the mounting cylinder under the driving of the elastic member.

[0015] Optionally, the movable cylinder and the mounting cylinder are both made of hard material, the pressure relief valve assembly comprising:

[0016] A sealing ring made of elastic material, the sealing ring being sleeved outside the movable cylinder and connected with the abutting boss, the sealing ring being used to sealingly connect the movable cylinder and the mounting cylinder.

[0017] Optionally, the elastic member is a spring, one end of the elastic member being connected with the closed end, the other end of the elastic member being sleeved outside the end of the fixed cylinder close to the movable cylinder.

[0018] Optionally, the mounting cylinder is made of hard material, the pressure relief valve assembly comprising:

[0019] The outer cover cylinder is coaxially sleeved outside the mounting cylinder and is made of elastic material. A plurality of air inlet micro-holes are arranged on the end face of one end of the outer cover cylinder close to the open end. The axial direction of the pressure relief valve assembly is parallel to the horizontal direction. The plurality of air inlet micro-holes are arranged on the upper part of the end face of the outer cover cylinder. The end of the outer cover cylinder close to the fixed cylinder is open.

[0020] Optionally, the end face of one end of the outer cover cylinder close to the open end is provided with a gas guide cylinder integrally formed therewith. The gas guide cylinder is located outside the outer cover cylinder. One end of the gas guide cylinder is used for communicating with the liquid storage cavity. The other end of the gas guide cylinder communicates with the plurality of air inlet micro-holes.

[0021] The second aspect of the present application provides an atomization device, which comprises:

[0022] The shell assembly is internally formed with a liquid storage cavity; and

[0023] The pressure relief valve assembly of any one of the above is detachably connected with the shell assembly. The open end communicates with the liquid storage cavity.

[0024] The third aspect of the present application provides an electronic atomizer, which comprises the above-mentioned atomization device.

[0025] In the pressure relief valve assembly of the present application, the inner cavity of the movable cylinder, the inner cavity of the mounting cylinder and the inner cavity of the fixed cylinder constitute a multi-section serial buffer channel, which breaks through the technical limitation of the existing single air vent hole direct exhaust without buffer. The high-pressure gas discharged from the liquid storage cavity first enters the inner cavity of the movable cylinder. Compared with the single air vent hole, the cavity has a larger volume. After the gas flow enters, it will be diffused instantaneously, and the flow rate of the gas will be reduced, effectively avoiding the turbulence caused by the direct impact of high-speed gas flow. After the gas flow diffused by the movable cylinder enters the inner cavity of the mounting cylinder, due to the gap cooperation between the mounting cylinder and the movable cylinder, the gas flow will form a laminar flow state along the inner wall of the mounting cylinder. The characteristic of laminar flow is uniform flow rate and no local vortex. The small liquid droplets (if any) entrained in the gas flow can be further separated by gravity and centrifugal force, so that they adhere to the inner wall of the mounting cylinder. The fixed cylinder serves as the last channel for gas flow discharge. The gas flow is further depressurized and stabilized in this process. This stable exhaust state can avoid the backflow of external air due to unstable exhaust gas flow.

[0026] The real-time balance of the elastic member and the air pressure has many advantages compared with the rigid adjustment of the passive straight-through of the single air hole. When the air pressure in the liquid storage cavity is in the normal use range, the air pressure in the liquid storage cavity is less than or equal to the sum of the atmospheric pressure and the elastic force of the elastic member, the pre-tightening force of the elastic member pushes the movable cylinder away from the fixed cylinder, the inner wall of the mounting cylinder tightly fits the outer wall of the movable cylinder, and the first air hole is completely closed. This design can prevent invalid exhaust under normal working conditions, block the intrusion of external pollutants, and form a negative pressure in the interior of the atomization device. When the air pressure in the liquid storage cavity exceeds the sum of the atmospheric pressure and the elastic force of the elastic member, the gas pressure pushes the movable cylinder to move towards the fixed cylinder against the elastic force, and the first air hole is gradually opened with the displacement of the movable cylinder, thereby avoiding the pressure accumulation in the liquid storage cavity. During the suction process, the air pressure in the liquid storage cavity fluctuates in a pulse mode (the pressure drops sharply during suction, and the pressure rises sharply after stopping), and the elastic member can respond to the change of the air pressure in real time, so that the air pressure in the liquid storage cavity is always stable.

[0027] In addition, the pressure relief valve assembly of the present application can be modularly designed, and compared with the single air hole which needs to be punched and sealed separately, the pressure relief valve assembly can realize integrated assembly of multiple components. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor based on the structures shown in the drawings.

[0029] Figure 1 The perspective of an embodiment of the pressure relief valve assembly of the present application Figure 1 ;

[0030] Figure 2 The explosion of the embodiment shown in Figure 1 ; Figure 1 ;

[0031] Figure 3 The perspective of the embodiment shown in Figure 1 ; Figure 2 ;

[0032] Figure 4 The explosion of the embodiment shown in Figure 1 ; Figure 2 ;

[0033] Figure 5 The cross-sectional view of the embodiment shown in Figure 1 ; Figure 1 ;

[0034] Figure 6 The cross-sectional view of the embodiment shown in Figure 1 ;Figure 2 ;

[0035] Figure 7 Figure 1 is a cross-sectional view of an embodiment of the atomization device of the present application.

[0036] BRIEF DESCRIPTION OF THE DRAWINGS

[0037]

[0038]

[0039] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work under the premise of the present application are within the scope of protection of the present application.

[0041] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications will also change accordingly.

[0042] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the technical features indicated or implicitly indicating the number of technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In addition, "and / or" throughout the text includes three solutions, for example, A and / or B includes A technical solution, B technical solution, and A and B simultaneously meet the technical solution; in addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the scope of protection claimed by the present application.

[0043] The application provides a pressure relief valve assembly for connecting a liquid storage cavity of an atomizing device, which comprises a mounting cylinder, a movable cylinder, a fixed cylinder, an elastic member and a limiting structure. The mounting cylinder is open at both ends. The movable cylinder is coaxially and sealingly sleeved at one end of the mounting cylinder, and comprises an open end and a closed end. The open end is close to the extended end of the mounting cylinder for connecting the liquid storage cavity. The peripheral wall of the movable cylinder is provided with a first air vent. The movable cylinder is movably connected with the mounting cylinder, and can be moved towards the middle part of the mounting cylinder under the pushing of the gas in the liquid storage cavity to make the first air vent communicate with the inner cavity of the mounting cylinder. The fixed cylinder is coaxially and sealingly sleeved at the other end of the mounting cylinder, and is fixedly connected with the mounting cylinder. The fixed cylinder is open at both ends, and the peripheral wall of the fixed cylinder is provided with a second air vent which communicates with the inner cavity of the mounting cylinder. The elastic member is connected with the movable cylinder, and is used for driving the movable cylinder to move away from the fixed cylinder to make the first air vent be closed by the inner wall of the mounting cylinder. The limiting structure is used for limiting the movement of the movable cylinder away from the fixed cylinder.

[0044] In the pressure relief valve assembly, the inner cavity of the movable cylinder, the inner cavity of the mounting cylinder and the inner cavity of the fixed cylinder constitute a multi-section serial buffer channel, which breaks through the technical limitation of the single air vent direct exhaust without buffer. The high-pressure gas discharged from the liquid storage cavity firstly enters the inner cavity of the movable cylinder, which has a larger volume than the single air vent, and the gas flow is diffused instantaneously after entering, and the flow rate of the gas is reduced, so that the turbulent flow caused by the direct impact of the high-speed gas flow is effectively avoided. After the gas flow diffused by the movable cylinder enters the inner cavity of the mounting cylinder, the gas flow forms a laminar flow state along the inner wall of the mounting cylinder due to the gap cooperation between the mounting cylinder and the movable cylinder. The laminar flow has the characteristics of uniform flow rate and no local vortex, and can further separate the small liquid droplets (if any) in the gas flow through the gravity and centrifugal force, so that the small liquid droplets are attached to the inner wall of the mounting cylinder.

[0045] The elastic member and the real-time balance of air pressure have many advantages, which are different from the passive and rigid adjustment of the single air hole. When the air pressure in the liquid storage cavity is in the normal use range, the air pressure in the liquid storage cavity is less than or equal to the sum of the atmospheric pressure and the elastic force of the elastic member, the pre-tightening force of the elastic member pushes the movable cylinder away from the fixed cylinder, the inner wall of the mounting cylinder tightly fits the outer wall of the movable cylinder, and the first air hole is completely closed. This design can prevent invalid exhaust under normal working conditions, block the invasion of external pollutants, and form a negative pressure in the internal atomization device. When the air pressure in the liquid storage cavity exceeds the sum of the atmospheric pressure and the elastic force of the elastic member, the gas pressure pushes the movable cylinder to move towards the fixed cylinder to overcome the elastic force, and the first air hole is gradually opened with the displacement of the movable cylinder, thereby avoiding the pressure accumulation in the liquid storage cavity. During the suction process, the air pressure in the liquid storage cavity fluctuates in a pulse mode (the pressure drops suddenly during suction, and the pressure rises suddenly after stopping), and the elastic member can respond to the change of the air pressure in real time, so that the air pressure in the liquid storage cavity is always stable.

[0046] In addition, the pressure relief valve assembly of the present application can be modularly designed, and compared with the existing single air hole which needs to be punched and sealed separately, the pressure relief valve assembly can realize integrated assembly of multiple components.

[0047] Please refer to Figures 1 to 7 The specific structure of the pressure relief valve assembly 100 will be described below.

[0048] The pressure relief valve assembly 100 includes an outer cover cylinder 110 made of an elastic material (silicone, plastic and / or rubber, etc.). The outer cover cylinder 110 is in a cylindrical shape, and a plurality of air inlet micro-holes 111 are formed on the end face of one end of the outer cover cylinder 110, and the other end of the outer cover cylinder 110 is open. The end face of one end of the outer cover cylinder 110 is provided with a gas guide cylinder 112 integrally formed thereon, the gas guide cylinder 112 is located outside the outer cover cylinder 110, one end of the gas guide cylinder 112 is used to communicate with the liquid storage cavity 210 of the atomization device 10, and the other end of the gas guide cylinder 112 communicates with the plurality of air inlet micro-holes 111. The gas in the liquid storage cavity 210 can enter the inner cavity of the outer cover cylinder 110 through the gas guide cylinder 112 and the plurality of air inlet micro-holes 111.

[0049] In some embodiments, the axial direction of the outer cover cylinder 110 is parallel to the horizontal direction, the plurality of air inlet micro-holes 111 and the air guide cylinder 112 are located at the upper part of the end surface of the outer cover cylinder 110, and the plurality of air inlet micro-holes 111 and the air guide cylinder 112 are preferably higher than the liquid level of the atomized substrate in the liquid storage cavity 210, so that the exhaust of the liquid storage cavity 210 is not blocked by the atomized substrate, and the pressure relief effect is better. The outer cover cylinder 110 is detachably and sealingly connected with the shell assembly 200 of the atomization device 10, and the inside of the shell assembly 200 forms the above-mentioned liquid storage cavity 210. The outer wall of the outer cover cylinder 110 can be provided with a sealing rib 113, which sealingly connects the outer cover cylinder 110 and the shell assembly 200, and the atomized substrate and gas in the liquid storage cavity 210 cannot leak between the outer cover cylinder 110 and the shell assembly 200. The sealing rib 113 can be arranged at the end of the outer cover cylinder 110 away from the air guide cylinder 112, and the end of the outer cover cylinder 110 away from the air guide cylinder 112 is farther away from the liquid storage cavity 210 than the other end thereof. The above arrangement can improve the connection firmness of the outer cover cylinder 110 and the shell assembly 200.

[0050] The pressure relief valve assembly 100 of the present application comprises a mounting cylinder 120. The mounting cylinder 120 is in the shape of a cylinder, both ends of the mounting cylinder 120 are open, the mounting cylinder 120 is coaxially sleeved in the outer cover cylinder 110, the mounting cylinder 120 can be made of a hard material (such as plastic, hard plastic or metal), and the mounting cylinder 120 and the outer cover cylinder 110 can be interference connected. The outer cover cylinder 110 can completely cover the mounting cylinder 120, or can only cover the end of the mounting cylinder 120 close to the plurality of air inlet micro-holes 111, without specific limitation. The mounting cylinder 120 comprises a small-diameter section 121 and a large-diameter section 122 which are in communication, the inner diameter of the small-diameter section 121 is smaller than that of the large-diameter section 122, and the small-diameter section 121 is closer to the plurality of air inlet micro-holes 111 than the large-diameter section 122. The end of the mounting cylinder 120 close to the plurality of air inlet micro-holes 111 is fusion welded with a liquid-blocking and air-permeating film 130, a plurality of extremely small holes are formed in the liquid-blocking and air-permeating film 130, the extremely small holes only allow gas to pass through and do not allow liquid drops to pass through, so that liquid drops in the gas cannot enter the mounting cylinder 120.

[0051] The pressure relief valve assembly 100 of this application includes a movable cylinder 140. The movable cylinder 140 is cylindrical and coaxially and sealingly fitted into one end of the mounting cylinder 120. The movable cylinder 140 is specifically assembled within the small-diameter section 121. The movable cylinder 140 includes an open end 141 and a closed end 142. The open end 141 is located near the extended end of the mounting cylinder 120 to communicate with the liquid storage chamber 210. A first vent hole 143 is provided on the peripheral wall of the movable cylinder 140. The movable cylinder 140 is movably connected to the mounting cylinder 120. The movable cylinder 140 can move towards the middle of the mounting cylinder 120 (i.e., away from the small-diameter section 121) under the push of gas in the liquid storage chamber 210 so that the first vent hole 143 communicates with the inner cavity of the mounting cylinder 120. There can be multiple first vent holes 143, which are arranged circumferentially along the movable cylinder 140. The movable cylinder 140 can also be made of a rigid material (such as plastic, hard plastic or metal), which facilitates its movement under force.

[0052] The pressure relief valve assembly 100 includes a sealing ring 150 made of an elastic material (such as plastic, silicone and / or rubber). The sealing ring 150 is sleeved on the outside of the movable cylinder 140 and is used to seal the connection between the movable cylinder 140 and the mounting cylinder 120, thereby enabling the movable cylinder 140 and the mounting cylinder 120 to be sealed together and preventing gas from leaking between the outer wall of the movable cylinder 140 and the inner wall of the mounting cylinder 120.

[0053] In the pressure relief valve assembly 100 of this application, the high-pressure gas discharged from the liquid storage chamber 210 further enters the inner cavity of the movable cylinder 140 through multiple air inlet micro-holes 111. The inner cavity of the movable cylinder 140 has a larger volume than a single vent hole. After the airflow enters, it diffuses instantly, and the gas velocity decreases, effectively avoiding turbulent liquid carryover caused by the direct impact of high-speed airflow. The airflow diffused through the movable cylinder 140 enters the inner cavity of the mounting cylinder 120 through the first vent hole 143. Because the mounting cylinder 120 (specifically the large-diameter section 122) and the movable cylinder 140 are fitted with a clearance, the airflow will form a laminar flow state along the inner wall of the mounting cylinder 120. The gas velocity is uniform and there are no local eddies. This can further separate the tiny liquid droplets (if any) entrained in the airflow through gravity and centrifugal force, causing them to adhere to the inner wall of the mounting cylinder 120.

[0054] The pressure relief valve assembly 100 of this application includes a fixed cylinder 160, which is coaxially and sealed within the end of the mounting cylinder 120 away from the movable cylinder 140. The fixed cylinder 160 is fixedly connected to the mounting cylinder 120 (interference fit, snap-fit, or adhesive, etc.), and the fixed cylinder 160 connects to the end of the large-diameter section 122 away from the small-diameter section 121. Both ends of the fixed cylinder 160 are open, and a second vent hole 161 is provided on the peripheral wall of the fixed cylinder 160, which communicates with the inner cavity of the mounting cylinder 120. There can be multiple second vent holes 161, which are arranged circumferentially around the fixed cylinder 160. Gas in the mounting cylinder 120 can flow into the fixed cylinder 160 through the end of the fixed cylinder 160 near the movable cylinder 140 and the second vent hole 161. The fixed cylinder 160 serves as the final channel for airflow discharge, during which the airflow is further depressurized and stabilized. This stable exhaust state prevents backflow of external air due to unstable exhaust airflow.

[0055] The size of the sealing end 142 (that is, the end of the movable cylinder 140 facing the fixed cylinder 160) is larger than the size of the end of the fixed cylinder 160 that is close to the movable cylinder 140. The movable cylinder 140 can close the fixed cylinder 160 through the sealing end 142 under the push of the gas in the liquid storage chamber 210. That is, after being pushed by the high-pressure gas, the movable cylinder 140 is finally stopped by the limit of the fixed cylinder 160, and at this time the gas in the mounting cylinder 120 can only flow into the fixed cylinder 160 through the second vent hole 161.

[0056] The above configuration offers numerous advantages. The sealing end 142 closes the end of the fixed cylinder 160 near the movable cylinder 140, meaning that airflow cannot directly flow into the fixed cylinder 160 from the gap between the movable cylinder 140 and the fixed cylinder 160; it can only flow through the second vent 161. As previously mentioned, the core function of the inner cavity of the mounting cylinder 120 is to create laminar flow and separate tiny droplets. Forcing the airflow through the second vent 161 ensures that all gas passes through the inner cavity of the mounting cylinder 120, fully completing the laminar flow conversion and oil-liquid separation, maintaining the liquid carryover rate at an extremely low level, and completely extending the anti-liquid carryover advantage of the multi-stage buffer system.

[0057] In addition, the limiting position of the fixed cylinder 160 ensures the precise maximum opening area of ​​the first vent 143, preventing uncontrolled adjustment. The flow area of ​​the second vent 161 and the maximum opening area of ​​the first vent 143 (corresponding to the limiting position of the movable cylinder 140) form a flow matching relationship. The first vent 143 is responsible for air intake regulation, controlling the air flow rate entering the mounting cylinder 120, while the second vent 161 is responsible for air outlet flow restriction (the sealing end 142 seals the end of the fixed cylinder 160 near the movable cylinder 140), controlling the air flow rate exiting the mounting cylinder 120. The combination of the two can prevent airflow from stagnating in the inner cavity of the mounting cylinder 120 or being discharged too quickly. Under extreme high pressure, if the airflow is discharged rapidly without restraint, the air pressure in the liquid storage chamber 210 may drop suddenly, forming a negative pressure impact. This can cause the sealing ring of the liquid storage chamber 210 to be sucked into the liquid storage chamber 210 due to the excessive pressure difference between the inside and outside, which may lead to leakage. The fixed diameter of the second vent 161 can limit the exhaust rate, so that the internal air pressure of the liquid storage chamber 210 decreases at a steady rate, avoiding negative pressure impact.

[0058] Furthermore, extreme high pressure can generate a huge thrust on the movable cylinder 140. The limiting function of the fixed cylinder 160 can withstand the impact force of the movable cylinder 140, dispersing the impact force to the fixed cylinder 160 and preventing damage from local overload. The limiting function of the fixed cylinder 160 can also strictly control the displacement of the movable cylinder 140 within the safe deformation range of the elastic element 170 (described in detail later), ensuring that the elastic element 170 maintains a stable preload force over a long period of time.

[0059] Please see Figure 5 and Figure 6 The end face of the sealing end 142 (i.e., the end of the movable cylinder 140 facing the fixed cylinder 160) can be a conical surface. Compared to the surface contact of a flat end face, the contact area of ​​the conical surface is smaller, but the sealing pressure is more concentrated. Under high pressure conditions, the gas pressure in the liquid storage chamber 210 will further compress the contact area between the conical end face of the sealing end 142 and the fixed cylinder 160, forming a self-tightening seal, which can effectively avoid local air leakage caused by uneven contact pressure on the flat end face under high pressure. Under extreme high pressure, when the movable cylinder 140 moves rapidly to the end of the fixed cylinder 160 under thrust, the inclined structure of the conical surface of the sealing end 142 can transform the rigid surface contact into a gradual inclined contact, which can disperse the impact force to the entire conical surface, thereby reducing the wear of the end of the fixed cylinder 160.

[0060] The outer wall of the fixed cylinder 160 away from the movable cylinder 140 extends outward to form a connecting boss 162. The connecting boss 162 and the end face of the mounting cylinder 120 near the extended end of the fixed cylinder 160 are press-fitted together, which can prevent the fixed cylinder 160 from being pushed out of the mounting cylinder 120 by the movable cylinder 140 (and the elastic member 170 mentioned later).

[0061] The pressure relief valve assembly 100 of this application includes an elastic element 170, which drives the movable cylinder 140 away from the fixed cylinder 160 to close the first vent 143 by the inner wall of the mounting cylinder 120. The real-time balance between the elastic element 170 and the air pressure, unlike the rigid adjustment of a single passive vent, offers numerous advantages. When the air pressure in the liquid storage chamber 210 is within the normal operating range, the air pressure in the liquid storage chamber 210 is less than or equal to the sum of atmospheric pressure and the elastic force of the elastic element 170. The pre-tightening force of the elastic element 170 pushes the movable cylinder 140 away from the fixed cylinder 160, and the inner wall of the mounting cylinder 120 tightly adheres to the outer wall of the movable cylinder 140, completely sealing the first vent 143. This design prevents ineffective exhaust under normal operating conditions, blocks the intrusion of external contaminants, and allows a negative pressure to be formed inside the atomizing device 10. When the gas pressure inside the liquid storage chamber 210 exceeds the sum of atmospheric pressure and the elastic force of the elastic element 170, the gas pressure pushes the movable cylinder 140 to overcome the elastic force and move towards the fixed cylinder 160. The first vent 143 gradually opens as the movable cylinder 140 moves, thus preventing pressure accumulation inside the liquid storage chamber 210. During the suction process, the gas pressure inside the liquid storage chamber 210 fluctuates in a pulsed manner (the pressure drops sharply during suction and rises sharply after stopping). The elastic element 170 can respond to the changes in gas pressure in real time, keeping the gas pressure inside the liquid storage chamber 210 stable.

[0062] The pressure relief valve assembly 100 of this application includes a limiting structure for limiting the movement of the movable cylinder 140 away from the fixed cylinder 160. The aforementioned liquid-blocking and venting membrane 130 is located at the end of the movable cylinder 140 away from the fixed cylinder 160. The limiting structure may include the liquid-blocking and venting membrane 130, meaning the liquid-blocking and venting membrane 130 can be used to limit the movement of the movable cylinder 140 away from the fixed cylinder 160. Of course, the liquid-blocking and venting membrane 130 may not be used to limit the movement of the movable cylinder 140 away from the fixed cylinder 160. The outer wall of the sealing end 142 (the end of the movable cylinder 140 near the fixed cylinder 160) extends outward to form an abutment boss 144. The limiting structure may include the abutment boss 144, meaning the abutment boss 144 can be used to abut against the inner wall of the mounting cylinder 120 under the drive of the elastic member 170. The abutment boss 144 is larger than the inner dimension of the small diameter section 121. Driven by the elastic element 170, the abutment boss 144 abuts against the end wall of the small diameter section 121 near the large diameter section 122. The aforementioned sealing ring 150 can be connected to the side of the abutment boss 144 away from the fixed cylinder 160, thereby the sealing ring 150 can buffer the impact of the abutment boss 144 on the inner wall of the mounting cylinder 120.

[0063] The elastic element 170 is a spring. One end of the elastic element 170 is connected to the sealing end 142, and the other end of the elastic element 170 is sleeved on the outside of the fixed cylinder 160 near the movable cylinder 140. The axial cross-section of the fixed cylinder 160 is T-shaped, that is, the fixed cylinder 160 includes two parts: a small part and a large part. The small part of the fixed cylinder 160 is closer to the movable cylinder 140 than its large part. One end of the elastic element 170 is connected to the abutment boss 144, and the other end of the elastic element 170 is sleeved on the outside of the small part of the fixed cylinder 160 and abuts against the large part of the fixed cylinder 160.

[0064] The pressure relief valve assembly 100 of this application can be modularly designed. Compared with the existing single vent hole which requires separate drilling and sealing, it can realize the integrated assembly of multiple components.

[0065] Please see Figure 7 This application proposes an atomizing device 10, which includes a housing assembly 200 and a pressure relief valve assembly 100. The housing assembly 200 has a liquid storage chamber 210 inside. The pressure relief valve assembly 100 is detachably connected to the housing assembly 200, and its open end 141 communicates with the liquid storage chamber 210. The atomizing device 10 of this application includes the aforementioned pressure relief valve assembly 100 and possesses all the beneficial effects of the pressure relief valve assembly 100, which will not be elaborated further.

[0066] This application also proposes an electronic atomizer, which includes the atomizing device 10 described above, and thus also has all the beneficial effects of the atomizing device 10 (i.e., the pressure relief valve assembly 100), as detailed above, and will not be repeated here.

[0067] The above description is merely a preferred embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the inventive concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A pressure relief valve assembly, characterized in that, The pressure relief valve assembly is used to connect to the liquid storage chamber of the atomizing device, and the pressure relief valve assembly includes: The mounting tube is open at both ends; A movable cylinder is coaxially and sealedly fitted into one end of the mounting cylinder. The movable cylinder includes an open end and a sealed end. The open end is close to the extended end of the mounting cylinder to communicate with the liquid storage chamber. A first vent hole is provided on the peripheral wall of the movable cylinder. The movable cylinder is movably connected to the mounting cylinder. The movable cylinder can move toward the middle of the mounting cylinder under the push of the gas in the liquid storage chamber so that the first vent hole communicates with the inner cavity of the mounting cylinder. A fixed cylinder is coaxially and sealed inside the other end of the mounting cylinder. The fixed cylinder is fixedly connected to the mounting cylinder. Both ends of the fixed cylinder are open. A second vent hole is provided on the peripheral wall of the fixed cylinder, and the second vent hole communicates with the inner cavity of the mounting cylinder. An elastic element, connecting the movable cylinder, the elastic element being used to drive the movable cylinder away from the fixed cylinder so that the first vent hole is closed by the inner wall of the mounting cylinder; and A limiting structure is used to limit the movement of the movable cylinder away from the fixed cylinder.

2. The pressure relief valve assembly according to claim 1, characterized in that, The movable cylinder, propelled by the gas within the liquid storage chamber, can seal the fixed cylinder through the sealing end, the end face of which is a conical surface.

3. The pressure relief valve assembly according to claim 1, characterized in that, A liquid-blocking and venting membrane is welded to one end of the mounting cylinder near the opening.

4. The pressure relief valve assembly according to claim 1, characterized in that, The outer wall of the sealing end extends outward to form an abutting boss. The limiting structure includes the abutting boss, which is used to abut against the inner wall of the mounting cylinder under the drive of the elastic member.

5. The pressure relief valve assembly according to claim 4, characterized in that, Both the movable cylinder and the mounting cylinder are made of rigid material, and the pressure relief valve assembly includes: The sealing ring, made of elastic material, is fitted over the movable cylinder and connected to the abutment boss. The sealing ring is used to seal the connection between the movable cylinder and the mounting cylinder.

6. The pressure relief valve assembly according to claim 1, characterized in that, The elastic element is a spring, one end of which is connected to the sealing end, and the other end of which is sleeved on the outside of the fixed cylinder near the movable cylinder.

7. The pressure relief valve assembly according to claim 1, characterized in that, The mounting sleeve is made of a rigid material, and the pressure relief valve assembly includes: The outer cover is made of elastic material and is coaxially sleeved outside the mounting cylinder. The end face of the outer cover near the open end has multiple air inlet micro-holes. The axial direction of the pressure relief valve assembly is parallel to the horizontal direction. The multiple air inlet micro-holes are located on the upper part of the end face of the outer cover. The end of the outer cover near the fixed cylinder is open.

8. The pressure relief valve assembly according to claim 7, characterized in that, An integrally formed air guide tube is provided on the end face of the outer cover cylinder near the opening end. The air guide tube is located outside the outer cover cylinder. One end of the air guide tube is used to connect to the liquid storage cavity, and the other end of the air guide tube is connected to the plurality of air inlet micro-holes.

9. An atomizing device, characterized in that, The atomizing device includes: The outer casing assembly has a liquid reservoir formed inside; and The pressure relief valve assembly according to any one of claims 1 to 8, wherein the pressure relief valve assembly is detachably connected to the housing assembly, and the open end communicates with the liquid storage chamber.

10. An electronic atomizer, characterized in that, The electronic atomizer includes the atomizing device as described in claim 9.

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