Self-controlled pressure-limiting air storage bag

Abstract

The present invention discloses a self-controlled pressure-limiting air storage bag, comprising an air bag and a sliding release assembly arranged on the wall of the air bag; the sliding release assembly comprises a sliding cover and a liquid storage box, the sliding cover and the liquid storage box are respectively fixedly connected to two different positions of the air bag wall, and the sliding cover and the liquid storage box are slidingly assembled, and the air bag wall pulls the sliding cover and the liquid storage box to slide relative to each other under the action of the inflation of the air bag; the liquid storage box is filled with a solvent for dissolving the material of the air bag wall, and is provided with a release hole covered by the sliding cover, and the sliding cover exposes the release hole on the liquid storage box by sliding relative to the liquid storage box. The self-controlled pressure-limiting air storage bag of the present invention can realize automatic pressure-limiting control of the air storage bag without modifying the anesthesia machine, thereby avoiding the medical safety hazard caused to patients and medical staff by excessive internal pressure of the air storage bag.

Description

Technical Field

[0001] The invention relates to a self-controlled pressure-limiting air storage bag used for oxygen supply and breathing of an anesthesia machine. Background Art

[0002] As one of the components of the breathing circuit of the anesthesia machine, the air storage bag is mainly used for providing fresh gas to the patient to ensure the normal oxygen supply to the patient under anesthesia. The input flow rate of the fresh gas can be adjusted by the control system of the anesthesia machine, and the output flow rate of the fresh gas is manually controlled by the anesthesiologist and monitored by a flow meter. For example, a Chinese patent with application number CN201020296240.8 discloses an oxygen flow control device for an anesthesia machine. However, the existing anesthesia machine does not have a good monitoring method for the pressure in the air bag.

[0003] In clinical practice, the air storage bag currently used is made of latex or rubber, which has good ductility and can store a large amount of gas and form a large pressure inside the bag. In this case, on the one hand, when the anesthesiologist manually controls the breathing, the tidal volume will be too large, resulting in excessive airway pressure in the patient, and even causing barotrauma, which is not conducive to the patient's weaning and postoperative recovery after awakening; on the other hand, since the air storage bag currently does not have any protection or monitoring measures, once the anesthesia machine fails during operation, the respiratory valve fails, the fresh gas flow is set too high, the airway pressure monitoring alarm fails, and other problems occur, the air storage bag will over-expand, which will cause irreversible damage to the patient's lungs in severe cases, posing a huge medical safety hazard. Summary of the invention

[0004] The technical problem solved by the present invention is: to address the safety problem of existing anesthesia machines due to the difficulty in monitoring the pressure of the air bag, a self-controlled pressure-limiting air bag is provided, which does not require any improvement or setting of the anesthesia machine system, and pressure monitoring and pressure-limiting protection are achieved through the air bag itself.

[0005] The present invention is implemented by the following technical solutions:

[0006] The self-controlled pressure-limiting air storage bag comprises an air bag 1 and a sliding release component 2 arranged on the wall of the air bag;

[0007] The sliding release assembly 2 comprises a sliding cover 21 and a liquid storage box 22, wherein the sliding cover 21 and the liquid storage box 22 are respectively fixedly connected to two different positions of the airbag wall, and the sliding cover 21 and the liquid storage box 22 are slidably assembled therebetween, and the airbag wall pulls the sliding cover 21 and the liquid storage box 22 to slide relative to each other under the action of the airbag inflation;

[0008] The liquid storage box 22 is filled with a solvent 3 for dissolving the airbag wall material, and is provided with a release hole 221 covered by the sliding cover 21. The sliding cover 21 slides relative to the liquid storage box to expose the release hole 221 on the liquid storage box.

[0009] As a preferred solution of the present invention, the release hole 221 is in an open state. The release hole 221 is located on the plane where the liquid storage box 22 and the sliding cover 21 are slidably assembled. A sealing gasket 27 is provided on the outer periphery of the release hole 221 on the plane.

[0010] As another preferred embodiment of the present invention, the release hole 221 is closed by a sealing film 222, and the sliding cover 21 is provided with a protruding tip 212 that destroys the sealing film 222 as the sliding cover slides relative to the liquid storage box.

[0011] Furthermore, the release hole 221 is located on the plane where the liquid storage box 22 and the sliding cover 21 are slidably assembled, and the protruding tip 212 is located on the plane where the sliding cover 21 and the liquid storage box 22 are slidably assembled. The plane extends in the sliding direction of the liquid storage box 22 relative to the sliding cover 21 and is docked with a groove 223 that accommodates the protruding tip 212.

[0012] Furthermore, a hollow guide hole 213 is provided inside the protruding tip 212, and the guide hole 213 penetrates the protruding tip and the sliding cover to the outer surface of the airbag wall.

[0013] In the self-controlled pressure-limiting air storage bag of the present invention, the liquid storage box 22 and the sliding cover 21 are guided and slidably assembled by means of the hook groove 23 and the guide rail 24 that are engaged with each other.

[0014] In the self-controlled pressure-limiting air storage bag of the present invention, the air bag wall is made of elastic latex or rubber material, and the solvent 3 filled in the liquid storage box is an aromatic hydrocarbon solvent, an aliphatic hydrocarbon solvent or a ketone solvent.

[0015] In the self-controlled pressure-limiting air storage bag of the present invention, the sliding cover 21 and the liquid storage box 22 are fixedly connected to the air bag wall by gluing or hot-melt structures respectively.

[0016] In the self-controlled pressure-limiting air storage bag of the present invention, the upper surface of the sliding cover 21 is slidably assembled with the liquid storage box 22 , and the release hole 221 is located on the bottom surface of the liquid storage box 22 .

[0017] Furthermore, the upper surface of the sliding cover 21 is also provided with an indicator bar 211 for displaying the internal pressure state of the corresponding airbag.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: since most of the current medical air storage bags are made of latex or rubber, whose chemical nature is olefin polymers, the present invention adds a sliding release component to the air bag wall surface of the air storage bag, and the liquid storage box and the sliding cover of the sliding release component slide relative to each other as the air bag is inflated and swollen. The liquid storage box of the sliding release component contains aromatic hydrocarbon solvents, aliphatic hydrocarbon solvents or ketone solvents, such as D-limonene. As the sliding cover and the liquid storage box slide relative to each other, the D-limonene inside the liquid storage box is released. D-limonene is a colorless, oily, transparent liquid with a lemon-like aroma. It is not only non-toxic, inexpensive, and easy to obtain, but when D-limonene comes into contact with the airbag wall made of latex or rubber, according to the principle of like dissolves like in organic matter, that is, polar solvents easily dissolve polar substances, and non-polar solvents easily dissolve non-polar substances, D-limonene can quickly dissolve some of the organic molecules in the latex or rubber, resulting in a swelling effect and forming a weak point in the airbag wall. Under the action of the pressure inside the airbag, the airbag surface that contacts D-limonene is the breakthrough point and the airbag ruptures, causing gas leakage inside the airbag, thereby avoiding lung barotrauma and operating room safety hazards caused by excessive inflation of the airbag.

[0019] The above process of the present invention only occurs when the pressure in the air bag is too high, and is a process that is spontaneously controlled as the air bag expands, does not require manual or instrument monitoring, and does not require changes to the control system of the device. The present invention also provides an indicator bar on the slide cover, which can be set with multiple colors corresponding to different pressure states inside the air bag. During use, the anesthesiologist can easily judge the pressure situation in the air bag quickly by the color of the indicator bar, and take corresponding measures before the air bag is stimulated to burst.

[0020] In summary, the self-controlled pressure-limiting air storage bag of the present invention can realize automatic pressure-limiting control of the air storage bag without modifying the anesthesia machine, thereby avoiding medical safety hazards to patients and medical staff caused by excessive internal pressure of the air storage bag.

[0021] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the appearance structure of the self-controlled pressure-limiting air storage bag of the present invention.

[0023] Figure 2 It is a schematic diagram of the sliding release assembly of the present invention on the surface of the airbag wall.

[0024] Figure 3 This is a schematic diagram of the external structure of the sliding release assembly in the first embodiment.

[0025] Figure 4 for Figure 3The A-direction cross-sectional schematic diagram in the figure is specifically a schematic diagram of the guide sliding assembly structure between the sliding cover and the liquid storage box of the sliding release assembly in the first embodiment.

[0026] Figure 5 It is a top view of the sliding cover in the first embodiment.

[0027] Figure 6 This is a bottom view of the liquid storage box in Example 1.

[0028] Figure 7 It is a schematic diagram of the external structure of the sliding release assembly in the second embodiment.

[0029] Figure 8 for Figure 7 The B-direction cross-sectional schematic diagram is specifically a schematic diagram of the guide sliding assembly structure between the sliding cover and the liquid storage box of the sliding release assembly in Example 2.

[0030] Fig. 9 It is a top view of the sliding cover in the second embodiment.

[0031] Fig.10 for Fig. 9 The C-direction cross-sectional schematic diagram in the figure is specifically a schematic diagram of the protruding tip structure on the sliding cover in the second embodiment.

[0032] Fig.11 This is a bottom view of the liquid storage box in Example 2.

[0033] Numbers in the figure: 1-airbag, 11-airbag wall, 2-sliding release assembly, 21-sliding cover, 211-indicator strip, 212-protruding tip, 213-flow guide hole, 22-liquid storage box, 221-release hole, 222-sealing film, 223-groove, 23-hook groove, 24-guide rail, 25-first connecting part, 26-second connecting part, 27-sealing gasket, 3-solvent. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] See also Figure 1 and Figure 2The air storage bag shown in the figure is a schematic diagram of the appearance structure of the self-controlled pressure-limiting air storage bag of the present invention, which includes an air bag 1 and a sliding release component 2. The air bag 1 is the same as the air storage bag on the existing anesthesia machine, and is surrounded by an air bag wall 11 made of rubber or latex, which has good elasticity. An interface is set on the top of the air bag 1 to connect the inlet and outlet of the air; the sliding release component 2 is set on the outer surface of the air bag wall 11, such as Figure 1 As shown in the figure, it can be arranged at the upper 1 / 3 of the airbag 1, and should be arranged at the front area of ​​the airbag 1 which is as flat as possible, so as to ensure effective traction on the sliding release component 2 and provide a certain sliding margin.

[0036] Two embodiments of the slide release assembly are disclosed below.

[0037] Embodiment 1

[0038] Specific as Figure 2 and Figure 3 As shown, the sliding release assembly 2 of this embodiment includes a sliding cover 21 and a liquid storage box 22. The bottom of the sliding cover 21 is fixedly attached to the outer surface of the airbag wall 11 through a first connecting portion 25, and part of the bottom of the liquid storage box 22 is fixedly attached to another outer surface of the airbag wall 11 through a second connecting portion 26. The other part of the bottom of the liquid storage box 22 is slidably assembled on the sliding cover 21. When the airbag wall 11 is stretched and deformed due to the inflation of the airbag, the sliding cover 21 and the liquid storage box 22 are pulled to both sides respectively. At the same time, the liquid storage box 22 is filled with solvent 3, and a release hole 221 is provided at the bottom of the liquid storage box corresponding to the liquid storage box filled with solvent 3. Under normal conditions, the release hole 221 is covered by the sliding cover 21, and the solvent 3 will not leak from the liquid storage box 22. When the airbag is inflated to a certain extent, the sliding cover 21 and the liquid storage box 22 move relative to each other to expose the release hole 221. At this time, the solvent 3 will flow out from the release hole 221 until it comes into contact with the airbag wall 11. The solvent 3 is an aromatic hydrocarbon solvent, an aliphatic hydrocarbon solvent or a ketone solvent that can dissolve rubber or latex. In this embodiment, D-limonene is an aliphatic hydrocarbon solvent that can undergo a dissolution reaction with rubber or latex. When D-limonene contacts the airbag wall 11, it quickly dissolves part of the organic molecules in the latex or rubber, causing the airbag wall 11 at the contact portion to become weak, ultimately causing the airbag to rupture from the weak portion, thereby preventing the internal pressure of the airbag from continuing to increase, thereby limiting the ultimate pressure inside the airbag 1.

[0039] The sliding cover 21 and the liquid storage box 22 can be fixedly connected to the airbag wall by gluing or hot-melt structure to form a first connecting portion 25 and a second connecting portion 26 respectively.

[0040] See also Figure 6In this embodiment, the release hole 221 is in an open state. The release hole 221 is located on the plane where the liquid storage box 22 and the sliding cover 21 are slidably assembled. No other closing structure is set for the release hole 221. Before the release hole 221 is exposed by the sliding cover 21, the release hole 221 is closed by the plane where the sliding cover 21 and the liquid storage box 22 are slidably assembled. A sealing ring is set on the outer periphery of the release hole 221 on the plane, and a sealing gasket 27 is assembled in the sealing ring to achieve the sealing of the release hole 221 before it is exposed. Figure 6 As shown, the sealing gasket 27 is made of a material that does not react with the solvent.

[0041] In this embodiment, the sliding cover 21 and the liquid storage box 22 are assembled with each other through the hook groove 23 and the guide rail 24. Figure 4 The sliding cover 21 has a T-shaped cross section, and guide rails 24 protruding outward are formed on the sides of both ends of the sliding cover 21. Two sets of hook grooves 23 facing inward are set on both sides of the bottom of the liquid storage box 22. The hook grooves 23 are just hooked on the guide rails 24 protruding outward from the sliding cover 21, forming a linear guide between the sliding cover 21 and the liquid storage box 22. At the same time, the liquid storage box 22 and the sliding cover 21 are locked in the vertical direction to prevent the liquid storage box 22 from separating during the sliding process on the sliding cover 21, and a certain vertical pressure is applied to the sealing gasket 27 during the sliding process of the liquid storage box 22 relative to the assembly plane of the sliding cover 21 to ensure the sealing reliability of the sealing gasket 27.

[0042] The sliding cover 21 and the liquid storage box 22 of the sliding release assembly 2 are both made of transparent plastic, and the gap between them is very small. In order to ensure the smooth sliding between the sliding cover 21 and the liquid storage box 22, a proper amount of lubricant can be applied between the hook groove 23 and the guide rail 24 to reduce the friction between them.

[0043] See also Figure 5In this embodiment, the upper surface of the slide cover 21 is slidably assembled with the liquid storage box 22, and the release hole 221 is located on the bottom surface of the liquid storage box 22. The liquid storage box 22 slides in contact with the upper surface of the slide cover 21 through the bottom surface. At the same time, after the slide cover 21 and the liquid storage box 22 slide relative to each other due to the expansion of the airbag pressure, part of the upper surface of the slide cover 21 will be exposed. Taking advantage of this, the present embodiment sets an indicator bar 211 on the upper surface of the slide cover 21 to display the corresponding airbag internal pressure state. The indicator bar 211 is in the shape of a long strip and is arranged along the sliding direction between the slide cover 21 and the liquid storage box 22. Different color blocks can be set on the indicator bar 211 along the sliding direction, such as green, yellow and red indicator color blocks, wherein the green area represents that the pressure in the airbag is normal and is located near the outermost end of the slide cover of the indicator bar 211. The yellow area represents that the pressure in the bag is in a critical state and is close to the inner side of the green area; the red area represents that the pressure in the bag is abnormally increased and is located at the innermost side. During use, the anesthesiologist can easily determine the pressure in the air storage bag and make corresponding treatments by the color of the indicator bar 211. In actual applications, a scale or other mark that can distinguish and display the pressure state of the air storage bag can also be used.

[0044] The indicator bar 211 is used to show that the pressure state of the internal pressure of the airbag is in a controllable state. Before the indicator bar 211 is fully visible, the slide cover 21 will not slide to expose the release hole 221 on the liquid storage box 22. The anesthesiologist can quickly take corresponding measures when the pressure of the airbag is abnormal by operating the anesthesia machine. When the medical staff fails to observe the indicator bar 211 to take corresponding measures, the slide cover 21 will continue to slide to expose the release hole 221, and the patient's safety will be achieved by actively destroying the airbag.

[0045] Embodiment 2

[0046] Specific as Figure 2 , Figure 7-11As shown, the sliding release assembly 2 of this embodiment also includes a sliding cover 21 and a liquid storage box 22. The sliding cover 21 and the liquid storage box 22 are respectively arranged on the outer surface of the airbag wall 11 through the same connection structure as that of the first embodiment. The difference is that in this embodiment, the release hole 221 arranged on the liquid storage box 22 is closed by a sealing film 222. No matter how the sliding cover moves, the release hole 221 is closed by the sealing film 222, and the solvent 3 will not leak from the liquid storage box 22. At the same time, a protruding tip 212 is provided on the sliding cover 21. When the airbag wall 11 is stretched and deformed due to the inflation inside the airbag, the sliding cover 21 and the liquid storage box 22 are pulled to slide relative to each other on both sides. The protruding tip 212 moves with the sliding cover 21 relative to the liquid storage box 22 until the sealing film 222 is pierced, and the solvent 3 inside the liquid storage box 22 is released. In this embodiment, D-limonene is used as the solvent. After D-limonene contacts the airbag wall 11, it quickly dissolves part of the organic molecules in the latex or rubber, so that the airbag wall 11 at the contact position becomes weak, and finally causes the airbag to rupture from the weak point, thereby realizing the pressure limiting protection of the airbag.

[0047] The sealing film 222 can be made of a material that does not react with the solvent 3, such as a plastic film, and is covered on the release hole 221 by gluing or hot melting. The thickness should not be too thick to ensure that the protruding tip 212 can puncture the sealing film after a slight effect on it.

[0048] like Figure 7 and Figure 8 As shown, the release hole 221 is located on the plane where the liquid storage box 22 and the sliding cover 21 are slidably assembled, and the protruding tip 212 is located on the plane where the sliding cover 21 and the liquid storage box 22 are slidably assembled, and the two are located on the same moving track, ensuring that the protruding tip 212 can act on the sealing film 222 on the release hole 221 during the relative movement of the sliding cover 21 and the liquid storage box 22. The protruding tip 212 is arranged to protrude from the assembly plane of the sliding cover 21, and a groove 223 for accommodating the protruding tip 212 is correspondingly arranged on the assembly plane of the liquid storage box 22, so that the structure between the sliding cover 21 and the liquid storage box 22 can be more compact. The groove 223 is arranged along the relative sliding direction of the sliding cover 21 and the liquid storage box 22, and docks with the release hole 221, as shown in FIG. Fig.11 As shown, after the protruding tip 212 moves to the end inside the groove 223, it can contact the sealing film 222 on the release hole 221. In this embodiment, the sealing film 222 on the sealing hole 221 can be tilted relative to the moving direction of the protruding tip 212, so that the protruding tip 212 can act on the sealing film 222.

[0049] Specific as Fig. 9 and Fig.10As shown, the protruding tip 212 protrudes from the upper surface of the sliding cover 21, and may be a sheet-shaped tip, a needle-shaped tip or a triangular prism-shaped tip. In order to ensure that the solvent inside the liquid storage box 22 flows accurately and quickly from the punctured sealing film to the surface of the airbag wall, the present embodiment provides a hollow guide hole 213 inside the protruding tip 212. The guide hole 213 penetrates from the tip of the protruding tip to the bottom surface of the sliding cover. After the protruding tip 212 punctures the sealing film, the solvent 3 flows directly to the outer surface of the airbag wall through the guide hole 213 and contacts the airbag wall.

[0050] The sliding cover 21 and the liquid storage box 22 in this embodiment can also be guided and slidably assembled by means of the hook grooves 23 and the guide rails 24 that interlock with each other. An indicator bar 211 that displays the corresponding internal pressure status of the airbag can also be provided on the upper surface of the sliding cover 21. The above structures are the same as those in the first embodiment and will not be described in detail in this embodiment.

[0051] When this embodiment is used, the interface on the airbag 1 is connected to the relevant parts of the anesthesia machine. During the operation of the anesthesia machine, the volume of the airbag 1 will swell as the pressure inside the airbag increases, and the airbag wall will stretch and deform, driving the slide cover 21 and the liquid storage box 22 to slide relative to each other. When the pressure inside the airbag is normal, the indicator bar 211 on the upper surface of the slide cover 21 only reveals the green area; when the pressure inside the airbag further increases, the indicator bar 211 can also reveal the yellow and red areas in turn, which has a warning effect to inform the anesthesiologist that the pressure of the airbag is increasing. If it is not discovered in time, the pressure in the airbag continues to increase, the sliding cover 21 and the liquid storage box 22 continue to slide, and the protruding tip 212 on the sliding cover 21 destroys the sealing film 222 on the release hole of the liquid storage box 22. The solvent D-limonene inside the liquid storage box 22 flows out from the damaged sealing film and quickly along the guide hole 213 on the sliding cover 21 and contacts the surface of the airbag wall. Under the pressure in the bag and the dissolution of D-limonene, the airbag 1 will burst and the gas in the bag will leak, avoiding further over-expansion of the airbag to ensure the safety of the patient. The above process only occurs when the pressure in the airbag is too high, and it is a spontaneous process, which does not require manual or instrument monitoring.

[0052] Although the embodiments of the present invention have been shown and described above, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Automatically controlled pressure-limited air storage bag, characterized by: It comprises an airbag (1) and a sliding release assembly (2) arranged on the wall of the airbag; The sliding release assembly (2) comprises a sliding cover (21) and a liquid storage box (22), wherein the sliding cover (21) and the liquid storage box (22) are respectively fixedly connected to two different positions of the airbag wall, and the sliding cover (21) and the liquid storage box (22) are slidingly assembled, and the airbag wall pulls the sliding cover (21) and the liquid storage box (22) to slide relative to each other under the action of the airbag inflation; The liquid storage box (22) is filled with a solvent (3) for dissolving the material of the airbag wall, and is provided with a release hole (221) covered by a sliding cover (21). The sliding cover (21) slides relative to the liquid storage box to expose the release hole (221) on the liquid storage box. After the release hole (221) is exposed, the solvent (3) flows out from the release hole (221) to contact the airbag wall (11), so that the airbag wall (11) at the contacting part is dissolved and weakened, causing the airbag to rupture from the weak part. The upper surface of the sliding cover (21) is also provided with an indicator bar (211) for displaying the internal pressure state of the corresponding airbag; The liquid storage box (22) and the sliding cover (21) are assembled in a guided sliding manner through a hook groove (23) and a guide rail (24) that engage with each other.

2. According to the self-controlled pressure-limiting air storage bag described in claim 1, the release hole (221) is in an open state, and the release hole (221) is located on the plane where the liquid storage box (22) and the sliding cover (21) are slidably assembled, and a sealing gasket (27) is provided on the outer periphery of the release hole (221) on the plane.

3. According to the self-controlled pressure-limiting air storage bag as described in claim 1, the release hole (221) is closed by a sealing film (222), and the sliding cover (21) is provided with a protruding tip (212) that slides relative to the liquid storage box until it destroys the sealing film (222).

4. According to the self-controlled pressure-limiting air storage bag as described in claim 3, the release hole (221) is located on the plane where the liquid storage box (22) and the sliding cover (21) are slidably assembled, and the protruding tip (212) is located on the plane where the sliding cover (21) and the liquid storage box (22) are slidably assembled, and the plane extends in the sliding direction of the liquid storage box (22) relative to the sliding cover (21) and is docked with a groove (223) for accommodating the protruding tip (212).

5. According to the self-controlled pressure-limiting air storage bag of claim 4, a hollow guide hole (213) is provided inside the protruding tip (212), and the guide hole (213) penetrates the protruding tip and the sliding cover to the outer surface of the air bag wall.

6. According to the self-controlled pressure-limiting air storage bag as described in claim 2 or 3, the air bag wall is made of elastic latex or rubber material, and the solvent (3) filled in the liquid storage box is an aromatic hydrocarbon solvent, an aliphatic hydrocarbon solvent or a ketone solvent.

7. According to the self-controlled pressure-limiting air storage bag according to claim 2 or 3, the sliding cover (21) and the liquid storage box (22) are fixedly connected to the air bag wall by gluing or hot-melt structure respectively.

8. According to the self-controlled pressure-limiting air storage bag according to claim 2 or 3, the upper surface of the sliding cover (21) is slidably assembled with the liquid storage box (22), and the release hole (221) is located on the bottom surface of the liquid storage box (22).

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