Pressure regulating valve structure and operation method thereof, and storage box

Abstract

The present disclosure provides a pressure-stabilizing valve structure, an operating method thereof, and a storage box. The pressure-stabilizing valve structure includes a valve body, an air supply portion, and a drying portion. One end of the air supply portion is provided corresponding to an opening at one end of the valve body, for supplying air to the pressure-stabilizing valve structure; and the drying portion is provided corresponding to the other end of the air supply portion, for drying the supplied air. The valve body includes a valve body and an electromagnetic switch. The valve body has a pressure relief port connecting the air supply portion and the drying portion; the electromagnetic switch is provided corresponding to the pressure relief port to seal the pressure relief port when power is on and open the pressure relief port when power is off. Therefore, compared with the existing ordinary pressure relief scheme, which is very easy to be blocked by frost and ice and cause the valve ventilation and pressure relief to fail, the electromagnetic switch can be used to effectively achieve the closure and opening of the pressure relief port, and the frost and ice on the pressure relief port can be effectively prevented by drying the air supply, etc., and the accidental abnormal opening of the pressure relief port can also be avoided.

Description

Technical Field

[0001] The present disclosure relates to the field of storage technology, and in particular to a pressure-stabilizing valve structure and an operating method thereof, and a storage box. Background Art

[0002] In the field of modern preservation technology, a preservation box with high temperature, low temperature, ultra-low temperature, high humidity or other preservation conditions will be provided for the preservation, transportation and other scenarios of special samples or products. However, for this type of preservation box, due to the special preservation conditions of the storage space inside the box, the air pressure of the storage space inside the box and the outside atmosphere often cannot be kept consistent, making it difficult to directly open the box and perform pick-and-place operations during subsequent operations. This requires ensuring that the air pressure inside and outside is kept consistent (i.e., pressure relief) during the opening process to reach a stable pressure state in order to achieve more convenient opening and take-and-place operations. However, as to how to make the storage space inside the box and the outside atmosphere maintain the same air pressure, the existing technology also provides some technical solutions that can be used to achieve short-term ventilation between the internal space of the box and the outside atmosphere, in order to achieve a good operating experience. However, in actual operation, these existing solutions still have major problems that need to be improved. Summary of the Invention

[0003] (1) Technical issues to be resolved

[0004] In order to solve at least one of the technical problems existing in the internal and external ventilation and pressure relief design scheme adopted by the existing storage box during operation, the present disclosure provides a pressure-stabilizing valve structure and an operating method thereof, and a storage box.

[0005] (2) Technical solution

[0006] One aspect of the present disclosure provides a pressure-stabilizing valve structure, which includes a valve body, an air supply portion, and a drying portion. The air supply portion is provided at one end corresponding to an opening at one end of the valve body and is used to supply air to the pressure-stabilizing valve structure; and the drying portion is provided at the other end corresponding to the air supply portion and is used to dry the supplied air. The valve body includes a valve body and an electromagnetic switch. The valve body has a pressure relief port connecting the air supply portion and the drying portion; the electromagnetic switch is provided corresponding to the pressure relief port to seal the pressure relief port when power is on and open the pressure relief port when power is off.

[0007] According to an embodiment of the present disclosure, the valve body includes a valve seat and a valve housing. The valve seat is connected to the air supply portion and serves as a supporting connection structure at one end of the valve body. The valve housing and the valve seat are matched and arranged to sandwich and form a central space of the valve body.

[0008] According to an embodiment of the present disclosure, the valve body further includes a valve core member. The valve core member has a pressure relief port disposed toward the electromagnetic switch and is located in the central space of the valve body. One end of the valve core member is configured to mate with the valve seat and the other end is configured to mate with the valve housing. The valve core member is configured to mate with the electromagnetic switch to close the pressure relief port when the electromagnetic switch of the valve body is energized.

[0009] According to an embodiment of the present disclosure, the valve core assembly includes a valve core housing, a valve core, a valve ring, and a valve core seat. The valve core housing matches the valve seat and is arranged in the central space of the valve body. The valve core is located in the center of the valve core housing and slides in and out relative to the valve core housing to seal the pressure relief port of the valve core assembly in conjunction with the electromagnetic switch when the electromagnetic switch is energized. The valve ring is an annular structure and is arranged in correspondence with the valve core to form the pressure relief port. The valve core seat matches the valve housing and is arranged in the central space of the valve body.

[0010] According to an embodiment of the present disclosure, the valve core housing includes at least two symmetrically arranged support ribs and at least two symmetrically arranged latching teeth. The at least two symmetrically arranged support ribs are evenly arranged along the outer side of the valve core housing to support the valve core housing in the central space of the valve body; the at least two symmetrically arranged latching teeth are evenly arranged along the outer side of the valve core housing to engage the valve core member with the inner wall surface of the valve housing.

[0011] According to an embodiment of the present disclosure, the valve core includes a movable post, a movable head, and a spring. The movable post is sleeved along the axial direction of the valve core housing within a movable tube provided in the center of the valve core housing, and moves axially along the movable tube. The movable head is disposed at and fixed to the top of the movable post. The spring is sleeved on the movable post, with one end contacting the center of the inner wall of the valve core housing and the other end contacting the movable head.

[0012] According to an embodiment of the present disclosure, the valve body further includes a sealing gasket and a sealing ring. The sealing gasket is disposed between the valve seat and the valve housing to seal the central space of the valve body; the sealing ring is disposed between the valve core seat of the valve core member and the valve housing to seal the gap between the valve core member and the valve housing.

[0013] According to an embodiment of the present disclosure, the electromagnetic switch includes a support frame and an electromagnetic column. The support frame is fixed to the valve seat and the valve housing along the periphery of the valve housing. The electromagnetic column is arranged on the support frame in correspondence with the pressure relief port of the valve core member and cooperates with the valve core of the valve core member that matches the pressure relief port to seal the pressure relief port when power is applied.

[0014] According to an embodiment of the present disclosure, the air supply unit includes a fan, which is disposed in a pipeline communicating between the drying unit and the valve body, and is used to supply air to the drying unit or the valve body.

[0015] According to an embodiment of the present disclosure, the drying unit includes a filter tube and a heating block. The filter tube is connected to the air supply unit at one end and filled with a desiccant for drying and filtering the air passing through it. The heating block is attached to at least a portion of the outer surface of the filter tube and, when powered on, heats the desiccant in the filter tube.

[0016] Another aspect of the present disclosure provides an operating method for the above-mentioned pressure-stabilizing valve structure, which includes: controlling the electromagnetic switch of the valve body of the pressure-stabilizing valve structure to be powered off; in response to the power off of the electromagnetic switch, energizing and heating the drying part and utilizing the air supply part to supply air, opening the pressure relief port through the air pressure difference inside and outside the pressure-stabilizing valve structure to achieve consistency in the air pressure inside and outside the pressure-stabilizing valve structure; and controlling the electromagnetic switch of the valve body of the pressure-stabilizing valve structure to be powered on, and causing the valve core of the valve core to seal the pressure relief port through the suction force of the electromagnetic switch on the valve core part of the valve body.

[0017] Another aspect of the present disclosure provides a storage box comprising a lid, a body, and the aforementioned pressure-stabilizing valve structure. The lid seals the access opening of the storage box; the body and lid mate to form a storage space for storage; and the aforementioned pressure-stabilizing valve structure is disposed on the lid or the body to connect the storage space of the body.

[0018] According to an embodiment of the present disclosure, the storage box further includes a conduit, one end of which is connected to the drying part of the pressure-stabilizing valve structure, the main body is arranged in the storage space, and the other end is arranged corresponding to the access port matching the box cover.

[0019] (3) Beneficial effects

[0020] The present disclosure provides a pressure-stabilizing valve structure, an operating method thereof, and a storage box. The pressure-stabilizing valve structure includes a valve body, an air supply portion, and a drying portion. One end of the air supply portion is provided corresponding to an opening at one end of the valve body, for supplying air to the pressure-stabilizing valve structure; and the drying portion is provided corresponding to the other end of the air supply portion, for drying the supplied air. The valve body includes a valve body and an electromagnetic switch. The valve body has a pressure relief port connecting the air supply portion and the drying portion; the electromagnetic switch is provided corresponding to the pressure relief port to seal the pressure relief port when power is on and open the pressure relief port when power is off. Therefore, compared with the existing ordinary pressure relief scheme, which is very easy to be blocked by frost and ice and cause the valve ventilation and pressure relief to fail, the electromagnetic switch can be used to effectively achieve the closure and opening of the pressure relief port, and the frost and ice on the pressure relief port can be effectively prevented by drying the air supply, etc., and the accidental abnormal opening of the pressure relief port can also be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematically shows a three-dimensional composition diagram of a pressure-stabilizing valve structure according to an embodiment of the present disclosure;

[0022] Figure 2 Schematically shows a three-dimensional exploded view of a pressure-stabilizing valve structure according to an embodiment of the present disclosure;

[0023] Figure 3 Schematically shows a cross-sectional composition diagram of a pressure-stabilizing valve structure according to an embodiment of the present disclosure;

[0024] Figure 4 A cross-sectional view schematically illustrates a valve body of a pressure-stabilizing valve structure according to an embodiment of the present disclosure; and

[0025] Figure 5 Schematically shows an exploded view of a valve body of a pressure-stabilizing valve structure according to an embodiment of the present disclosure;

[0026] Figure 6 A flow chart schematically illustrates an operating method of a pressure stabilizing valve structure according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0027] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0028] It should be noted that any implementations not shown or described in the drawings or the main text of the specification are known to those skilled in the art and are not described in detail. Furthermore, the definitions of the various elements and methods described above are not limited to the specific structures, shapes, or methods described in the embodiments; those skilled in the art may easily modify or replace them.

[0029] It should also be noted that directional terms such as "upper," "lower," "front," "back," "left," and "right" mentioned in the embodiments are merely references to the directions in the accompanying drawings and are not intended to limit the scope of protection of this disclosure. Throughout the drawings, identical elements are represented by identical or similar reference numerals. Conventional structures or configurations will be omitted where they may cause confusion in understanding this disclosure.

[0030] Furthermore, the shapes and sizes of the components in the figures do not reflect the actual sizes and proportions, but are merely illustrative of the contents of the embodiments of the present disclosure. In addition, in the claims, any reference signs placed between brackets should not be construed as limiting the claims.

[0031] Furthermore, the word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements.

[0032] The use of ordinal numbers such as "first," "second," "third," etc. in the specification and claims to modify corresponding elements does not in itself mean that the elements have any ordinal number, nor does it represent the order of one element relative to another or the order in the manufacturing method. The use of these ordinal numbers is only used to clearly distinguish one element with a certain name from another element with the same name.

[0033] Those skilled in the art will appreciate that the modules in the devices of the embodiments may be adaptively changed and placed in one or more devices different from the embodiments. The modules or units or components in the embodiments may be combined into one module or unit or component, and further they may be divided into a plurality of submodules or subunits or subcomponents. All features disclosed in this specification (including the accompanying claims, abstract and drawings) and all processes or units of any method or device so disclosed may be combined in any combination, except that at least some of such features and / or processes or units are mutually exclusive. Unless expressly stated otherwise, each feature disclosed in this specification (including the accompanying claims, abstract and drawings) may be replaced by an alternative feature providing the same, equivalent or similar purpose. Furthermore, in a unit claim enumerating a number of means, several of these means may be embodied by the same item of hardware.

[0034] Similarly, it should be understood that in order to streamline the present disclosure and aid in understanding one or more of the various disclosed aspects, in the above description of exemplary embodiments of the present disclosure, various features of the present disclosure are sometimes grouped together into a single embodiment, figure, or description thereof. However, this disclosed approach should not be interpreted as reflecting an intention that the claimed disclosure requires more features than are expressly recited in each claim. Rather, as reflected in the claims below, the disclosed aspects lie in less than all the features of the individual embodiments disclosed above. Accordingly, the claims that follow the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of the present disclosure.

[0035] Existing low-temperature and ultra-low-temperature storage boxes utilize a pressure float-type balancing design to achieve internal pressure relief and ventilation. This design utilizes a spherical steel ball that relies on gravity to block the vent opening. When a pressure differential between the storage space and the outside atmosphere occurs, the outside atmospheric pressure pushes the ball up. When the pressures are balanced, the ball falls due to gravity, sealing the vent opening. However, this pressure float-type balancing design is prone to frost and ice forming on the vent opening, blocking the vent. Furthermore, even a slight icing on the steel ball can result in a loose seal between the ball and the vent opening. During the storage of specific samples or products, especially those with high preservation requirements, frequent pressure relief can cause significant temperature fluctuations within the cabinet, potentially damaging the samples. Furthermore, even with conventional pressure relief and ventilation solutions, when the valve is closed, a pressure differential can easily arise due to temperature fluctuations within the cabinet, causing the valve pressure relief opening to automatically open, exposing the internal storage space directly to the atmosphere and potentially damaging the stored samples or products.

[0036] In order to solve at least one of the technical problems existing in the internal and external ventilation and pressure relief design scheme adopted by the existing storage box during operation, the present disclosure provides a pressure-stabilizing valve structure and an operating method thereof, and a storage box.

[0037] like Figure 1-Figure 3 As shown, one aspect of the present disclosure provides a pressure-stabilizing valve structure, which includes a valve body 100 , an air supply portion 200 and a drying portion 300 .

[0038] One end of the air supply portion 200 is provided corresponding to the opening at one end of the valve body portion 100 , and is used to supply air to the pressure stabilizing valve structure; and

[0039] The drying portion 300 is provided corresponding to the other end of the air supply portion 200 and is used for drying the air supply.

[0040] The valve body portion 100 includes a valve body and an electromagnetic switch 160 .

[0041] The valve body has a pressure relief port connecting the air supply portion 200 and the drying portion 300;

[0042] The electromagnetic switch 160 is provided corresponding to the pressure relief port to seal the pressure relief port when power is on and to open the pressure relief port when power is off.

[0043] The air supply section 200 can provide an air flow effect in the entire pressure-stabilizing valve structure and guide the air in the pressure-stabilizing valve structure. The air supply section is located between the drying section 300 and the valve body 100, and is used to connect the drying section 300 and the valve body 100. Among them, the valve body 100 has a pressure relief port at one end thereof, i.e., the external space of the pressure-stabilizing valve structure, which is generally an indoor environment under atmospheric conditions. Correspondingly, the other end of the drying section 300 that is not intended to be connected to the air supply section 200 is connected to a storage space, such as the internal storage space of a preservation box, which is used to preserve samples or products under specific preservation conditions. In this way, a larger distance can be created between the valve body 100 and the storage space, further reducing the possibility of frost and ice forming on and near the pressure relief port of the valve body 100.

[0044] The drying section 300 can dry the air passing through it and remove as much moisture as possible. The air supply section 200 can guide the atmospheric air passing through the valve body 100 to the drying section 300 and into the storage space, and can also guide the air in the storage space passing through the drying section 300 to the valve body 100 and be discharged through the pressure relief port. Therefore, the air guided by the air supply section 200 and dried by the drying section 300 and then entering the storage space of the valve body 100 can maintain an extremely low moisture content, preventing the valve body 100 from condensing, frosting, or even ice. On the contrary, the air from the valve body 100 or the atmospheric air passing through the valve body 100 and then entering the storage space after being guided by the air supply section 200 and dried by the drying section 300 can maintain an extremely low moisture content, preventing the outside air from interfering with the storage space.

[0045] The valve body 100 has a pressure relief port, which communicates with the air supply unit 200 through the central space of the valve body, and through the air supply unit, communicates with the drying unit 300, ultimately allowing the pressure-stabilizing valve structure to communicate with the storage space. Therefore, when the pressure relief port is closed, the pressure-stabilizing valve structure can maintain the storage space closed. When the pressure relief port is opened, the pressure-stabilizing valve structure can open the storage space, achieving ventilation and communication between the inside and outside, maintaining consistent air pressure inside and outside, and achieving a pressure relief effect.

[0046] The electromagnetic switch 160 controls the suction force on the internal structure of the valve body by turning on and off the power supply. When the electromagnetic switch 160 is set corresponding to the pressure relief port of the valve body, it can cooperate with the internal structure of the valve body to close the pressure relief port when the power is on, achieving a tight sealing effect and blocking the ventilation between the inside and outside. The electromagnetic switch 160 can also abandon the attraction of the valve body when the power is off, so that the pressure relief port does not have a tight sealing effect. When there is a pressure difference between the inside and the outside, the electromagnetic switch 160 can open the pressure relief port with the help of atmospheric pressure, thereby achieving ventilation between the inside and the outside to achieve a pressure relief effect. Among them, when the power is on, the electromagnetic switch 160 can always maintain the suction force on the internal structure of the valve body, so that the pressure relief port always maintains a stable sealing effect, preventing the pressure relief port from accidentally opening due to unexpected circumstances and avoiding unexpected impacts on the storage space.

[0047] Therefore, compared with the existing ordinary pressure relief scheme, which is very easy to be blocked by frost and ice and cause the valve ventilation and pressure relief failure, the electromagnetic switch can be used to effectively achieve the closing and opening of the pressure relief port, and the frost and ice of the pressure relief port can be effectively prevented by drying the air supply, and the accidental abnormal opening of the pressure relief port can be avoided.

[0048] like Figure 1-Figure 5 As shown, according to an embodiment of the present disclosure, the valve body includes a valve seat 110 and a valve housing 150 .

[0049] The valve seat 110 is connected to the air supply portion 200 and serves as a supporting connection structure at one end of the valve body portion 100;

[0050] The valve housing 150 and the valve seat 110 are matched and arranged to sandwich and form a central space of the valve body 100 .

[0051] The valve body 100 has a central space connected to the pressure relief port. This space also houses the valve body's internal structure. This internal structure can cooperate with the electromagnetic switch 160, closing the pressure relief port when energized. The valve seat 110 and valve housing 150 cooperate to form the main supporting shell structure of the valve body. The valve seat 110 serves as the cover of this supporting shell structure, while the valve housing 150 serves as the main body of the supporting shell structure, forming the majority of the central space.

[0052] like Figure 1-Figure 5 As shown, according to an embodiment of the present disclosure, the valve body further includes a valve core member.

[0053] The valve core member has a pressure relief port set toward the electromagnetic switch, located in the middle space of the valve body 100, with one end matching the valve seat 110 and the other end matching the valve shell 150, for matching the electromagnetic switch 160 to close the pressure relief port when the electromagnetic switch 160 of the valve body 100 is energized.

[0054] The valve core is a core component in the middle space of the valve body 100 , which can cooperate with the electromagnetic switch 160 and is attracted by the electromagnetic switch 160 after power is turned on to cooperate with the electromagnetic switch 160 to close the pressure relief port.

[0055] like Figure 1-Figure 5 As shown, according to an embodiment of the present disclosure, the valve core member includes a valve core housing 131 , a valve core 132 , a valve ring 133 and a valve core seat 134 .

[0056] The valve core housing 131 matches the valve seat 110 and is disposed in the middle space of the valve body 100 ;

[0057] The valve core 132 corresponds to the center of the valve core housing 131, is sleeved in the valve core housing 131, and slides in and out relative to the valve core housing 131, so as to cooperate with the electromagnetic switch 160 to seal the pressure relief port of the valve core member when the electromagnetic switch 160 is energized;

[0058] The valve ring 133 is an annular structure, which is arranged corresponding to the valve core 132 to form a pressure relief port;

[0059] The valve core seat 134 matches the valve housing 150 and is disposed in the middle space of the valve body 100 .

[0060] The valve seat 110 and valve housing 150 cooperate to sandwich the valve core housing 131, valve core 132, valve ring 133, and valve core seat 134 of the valve core assembly within the central space of the valve body 100. The valve core housing 131 is fixed within the central space of the valve body and cannot move relative to the valve body. The valve core housing 131 serves as the primary support structure for the valve core assembly, primarily ensuring its secure support within the central space.

[0061] The valve core 132 is provided corresponding to the pressure relief port and can be a structure such as a metal material that can realize electromagnetic attraction. After the electromagnetic switch 160 is energized, it can be subjected to the suction force of the electromagnetic switch 160 to close the pressure relief port. Therefore, the valve core 132 can move relative to the valve core shell 131 in the valve core component. Among them, the valve core 132 can move back and forth or reciprocate along the axial direction (from the valve core shell 131 to the valve core seat 134) relative to the valve core shell 131. Among them, when the electromagnetic switch 160 is energized, it will provide suction to the valve core 132, attracting the valve core 132 to move toward the valve core seat 134, so that the valve core 132 can close the pressure relief port and seal the pressure regulating valve structure, thereby isolating the pressure regulating valve structure from the external atmospheric environment; on the contrary, when the electromagnetic switch 160 is de-energized, the electromagnetic switch 160 cannot provide suction to the valve core 132, and the valve core 132 will not be able to achieve a tight sealing effect on the pressure relief port at this time.

[0062] The valve ring 133 can be an elastically recoverable annular structure made of organic materials such as silicone, which is used to provide a buffering and sealing effect. The opening in the middle of the valve ring 133 can serve as a pressure relief port for the valve core component, so as to cooperate with the valve core 132 for sealing when the electromagnetic switch 160 is energized. The valve ring 133 is located on the inner wall annular surface of the valve core seat 134 and contacts the annular protrusion at the lower end of the valve core shell 131. It is sandwiched between the valve core seat 134 and the valve core shell 131 to absorb the buffer between the two. At the same time, when the valve core 132 blocks the pressure relief port of the valve ring 133, it achieves a sealing effect on the interior of the entire valve core component to prevent the valve core component from leaking.

[0063] The valve core seat 134 and the valve core shell 131 cooperate with each other to fix the valve core component, provide the valve core 132 with movable space and support structure inside the valve core component, and fix the entire valve core component in the valve shell 150 with the help of the lower annular convexity of the valve core seat 134.

[0064] like Figure 1-Figure 5 As shown, according to an embodiment of the present disclosure, the valve core housing 131 includes at least two mutually symmetrically arranged support ribs 311 and at least two mutually symmetrically arranged latching teeth 312.

[0065] At least two mutually symmetrical support ribs 311 are evenly arranged along the outer side of the valve core housing 131 to support the valve core housing 131 in the middle space of the valve body 100;

[0066] At least two symmetrically arranged latching teeth 312 are evenly arranged along the outer side of the valve core housing 131 for engaging the valve core member with the inner wall surface of the valve housing 150 .

[0067] like Figure 5 As shown, there can be four support ribs 311, which are symmetrically distributed around the periphery of the valve core housing 131 along the main body of the valve core housing 131. Therefore, when the valve core housing 131 is disposed in the middle space between the valve housing 150 and the valve seat 110, the valve core housing 131 can be fixed to the valve seat 110 by means of the support ribs 311, preventing the valve core housing 131 from rotating around its own axis in the middle space, while also supporting and fixing the entire valve core component.

[0068] There can also be four latching teeth 312, which are distributed along the annular shell below the valve core shell 131. The latching teeth 312 can serve as a part of the annular shell and be inclined in an arc shape toward the outer side of the annular shell, so that after the valve core shell 131 is assembled with the valve core 132, valve ring 133 and valve core seat 134, the entire valve core part can be fixed to the valve core part and the valve shell 150 with the help of the latching teeth 312 and the latching protrusions on the inner wall surface of the valve shell 150.

[0069] Each latch 312 is provided with an arc-shaped outward inclination corresponding to the annular housing of the valve core housing 131 between two adjacent support members 311. In this way, the latch 312 and the support member 311 are prevented from interfering with each other in terms of structural stability, so that both can have good structural performance without interfering with each other.

[0070] like Figure 1-Figure 5 As shown, according to an embodiment of the present disclosure, the valve core 132 includes a movable post 321 , a movable head 322 and a spring.

[0071] The movable post 321 is sleeved in the movable tube opened in the center of the valve core housing 131 along the axial direction of the valve core housing 131 and moves along the movable tube in the axial direction;

[0072] The movable head 322 is disposed at the top of the movable column 321 and is fixed to the top of the movable column 321;

[0073] The spring (not shown) is sleeved on the movable column 321 , with one end abutting the center of the inner wall of the valve core housing 131 and the other end abutting the movable head 322 .

[0074] The movable post 321 and movable head 322 can be integrally formed, thereby enhancing the overall structural strength of the valve core 132 and preventing accidental damage. Parallel and evenly distributed reinforcing ribs are provided on the outer surface of the movable post 321 along the axial direction. This reduces the contact area between the movable tube of the valve core housing 131 and the movable post 321. This not only strengthens the structural strength of the movable post 321 but also ensures that, even when the movable post 321 is hollow, it still achieves excellent relative sliding between the movable post 321 and the corresponding movable tube.

[0075] The movable head 322 can be a truncated cone, a hemisphere, or a frustum with an arc-shaped top, etc. It can generally be a structure made of metal material or the like with electromagnetic attraction function, which can achieve the effect of energized attraction with the electromagnetic switch 160 and close the pressure relief port.

[0076] The spring is mounted on the movable column 321 and can provide elastic force to the movable head 322 relative to the valve core housing 131, so that the valve core 132 can use this elastic force to support the movable head 322 and close the pressure relief port when the electromagnetic switch 160 is powered off and the internal and external air pressures are balanced (no pressure difference). When the electromagnetic switch 160 is powered on, the movable head 322 will cooperate with the electromagnetic switch 160 to achieve a closed seal on the pressure relief port. When the electromagnetic switch 160 is powered off and the external atmospheric pressure is greater than the internal air pressure of the pressure-stabilizing valve structure, the external atmospheric pressure can overcome the spring force and push open the movable head 322 that closes the pressure relief port, achieving internal and external ventilation and pressure balance. With this spring, it can be ensured that when the internal and external air pressures remain balanced, the pressure relief port is always closed by the movable head acted upon by the spring, ensuring that air will not enter the pressure-stabilizing valve structure due to unexpected circumstances during operation and adversely affect the stored samples or products in the storage space.

[0077] like Figure 1-Figure 5 As shown, according to an embodiment of the present disclosure, the valve body further includes a sealing gasket 120 and a sealing ring 140 .

[0078] The sealing gasket 120 is provided between the valve seat 110 and the valve housing 150 to seal the middle space of the valve body 100;

[0079] The sealing ring 140 is disposed between the valve core seat of the valve core member and the valve housing 150 to seal the gap between the valve core member and the valve housing 150 .

[0080] The sealing gasket 120 can be an annular sheet structure with a pressurized sealing effect made of organic materials such as silicone. It is arranged between the annular convex wing of the valve seat 110 and the annular convex wing of the valve shell 150, and utilizes the mutually symmetrical fixing holes on the annular convex wings of the two, with the help of fixing parts such as screws to achieve the effect of clamping the sealing gasket 120 between the valve seat 110 and the valve shell 150 to seal the central space therebetween.

[0081] The sealing ring 140 can be an annular cylindrical structure made of an organic material such as silicone, which has a pressurized sealing effect, and can be a silicone O-ring. It is disposed on the outer periphery of the annular protrusion at the lower end of the valve core seat 134. When the valve core is assembled with the valve housing 150, it is located between the outer periphery of the annular protrusion at the lower end of the valve core seat 134 and the outer wall surface of the lower end of the valve housing 150, thereby sealing and buffering the gap between the two.

[0082] like Figure 1-Figure 5 As shown, according to an embodiment of the present disclosure, the electromagnetic switch 160 includes a support frame 161 and an electromagnetic column 162 .

[0083] The support frame 161 is fixed to the valve seat 110 and the valve housing 150 along the periphery of the valve housing 150 ;

[0084] The electromagnetic column 162 corresponds to the pressure relief port of the valve core member, is set on the support frame 161, and cooperates with the valve core 132 of the valve core member matching the pressure relief port to achieve sealing of the pressure relief port when power is turned on.

[0085] Support bracket 161 is symmetrically arranged along the periphery of valve housing 150. The valve seat 110, sealing gasket 120, valve housing 150, and support bracket 161 are simultaneously secured to each other using the corresponding fixing holes in the annular fins on valve seat 110 and valve housing 150. This allows electromagnetic switch 160 to be securely fixed to the valve body, allowing electromagnetic switch 160 to be stably fixed to the pressure-stabilizing valve structure and maintain relative stability to the valve body. In other words, when electromagnetic switch 160 is powered on or off, it is the valve core 132 of the valve body that moves relative to electromagnetic switch 160.

[0086] The electromagnetic column 162 has a coiled metal rod at its center, which generates an attractive force when powered on and removes the attractive force when powered off. When powered on, the electromagnetic column 162 generates an attractive force, causing the top end face of the movable head 322 of the valve core 132 to align with or approach the top end face of the electromagnetic column 162 (the two end faces may or may not touch), thereby sealing the pressure relief port with the movable head 322.

[0087] It should be noted that the difficulty of opening the door varies for storage spaces of different volumes. In this case, different springs can be selected accordingly. At the same time, the current of the electromagnetic switch 160, the metal rod material of the electromagnetic column 162, and the number of coil turns can also be set accordingly to adapt to different pressure relief port opening pressure values. The details will not be elaborated here.

[0088] like Figure 1-Figure 5 As shown, according to an embodiment of the present disclosure, the air supply unit 200 includes a fan.

[0089] The fan is disposed in a pipeline communicating between the drying section 300 and the valve body 100 , and is used to supply air to the drying section 300 or the valve body 100 .

[0090] The fan can be a small axial flow fan that can be electrically controlled to rotate clockwise or counterclockwise, and can supply air to the drying section 300 or the valve body 100 in different rotation directions. For example, when the air pressure in the storage space for storage is lower than the external atmospheric pressure, the electromagnetic switch 160 is powered off, and the closed seal between the valve core 132 and the pressure relief port is released. At this time, the atmospheric pressure will overcome the spring force of the valve core 132, push open the movable head of the valve core 132, and open the pressure relief port, thereby achieving internal and external communication. At this time, the air supply section 200 can supply air to the storage space, so that the dried external air passing through the drying section 300 enters the storage space, ensuring the balance of internal and external air pressure. On the contrary, if the pressure difference between the two is opposite, the air can be supplied in the opposite direction, so that the air in the storage space dried by the drying section 300 is discharged from the pressure stabilizing valve structure through the pressure relief port.

[0091] like Figure 1-Figure 5 As shown, according to an embodiment of the present disclosure, the drying unit 300 includes a filter tube 310 and a heating block 320 .

[0092] One end of the filter tube 310 is connected to the air supply unit 200 and is filled with a desiccant for drying and filtering the air passing through it;

[0093] The heating block 320 is attached to at least a portion of the outer surface of the filter tube 310 and is used to heat the desiccant filled in the filter tube 310 after being powered on for heating.

[0094] The filter tube 310 is a tubular structure that is expanded in the middle and contracted at both ends. The middle of the expanded portion is filled with a dry material such as silica gel drying particles as a desiccant to dehumidify the air passing through the filter tube 310 to achieve a drying effect.

[0095] When powered, the heating block 320 generates a heating effect. Its inner curved surface serves as the heating surface, which can be attached to the filter tube 310 along the outer surface of the central bulge. The heating surface of the heating block 320 rapidly heats the desiccant in the attached filter canister 310, accelerating the drying of the desiccant under the air supply of the air supply unit 200 and enabling reuse of the desiccant. This ensures that the drying unit 300 maintains its drying effect.

[0096] Among them, the filter tube 310 of the drying section 300 can be heated when the storage space is opened, and the hot and humid air generated by the heating of the filter tube 310 can be directly discharged from the storage space, thereby preventing the storage of samples or products in the storage space from being affected, and avoiding conflicts with the pressure stabilizing and pressure relief functions of the pressure stabilizing valve structure. The details are not elaborated here.

[0097] Therefore, compared with traditional low-temperature and ultra-low-temperature storage boxes, in which the volume is reduced due to thermal expansion and contraction of air during use, resulting in negative pressure inside the box and making it difficult to open the door, and ordinary pressure relief devices are very prone to frost and ice blocking the valve, causing valve failure, the pressure-stabilizing valve structure based on the above-mentioned embodiment of the present invention can achieve communication and ventilation between the storage space and the outside world, and when the air pressure in the storage space is too low, the electromagnetic switch 160 is powered off to release the suction of the valve core 132, and the spring force of the valve core 132 is overcome by the external atmospheric pressure, and the valve core 132 is pushed open, so that the pressure relief port is opened, and the external air is connected to the storage space through the valve body-air supply part 200-drying part 300 of the valve body part 100 for ventilation, so as to achieve internal and external air pressure balance. At this time, the external atmospheric pressure on the valve core 132 is removed, and due to the action of the spring force, the pressure relief port is blocked here, thereby achieving the automatic closing effect of the pressure relief port of the pressure-stabilizing valve structure. The electromagnetic switch 160 can realize subjective control of power on and off by humans, or can automatically realize the power on and off process according to the actual sample storage or retrieval requirements and conditions.

[0098] In addition, the existing conventional technology can also achieve internal and external pressure stabilization within about 4 minutes after the storage space is closed. At this time, the temperature change in the cabinet will produce a pressure difference, causing the ordinary valve to open automatically and the storage space to be exposed to atmospheric pressure, which can easily cause damage to samples or products. In response to this, the above-mentioned pressure-stabilizing valve structure of the embodiment of the present disclosure can use an electromagnetic switch to directly power on to close the pressure relief port when it detects that the storage space has been closed for more than 4 minutes, ensuring that during the sample storage process, the sample will not be damaged due to the pressure difference caused by the temperature change in the cabinet, which will cause the pressure-stabilizing valve to open automatically.

[0099] like Figure 6 As shown, combined Figure 1-Figure 5 The above-mentioned pressure-stabilizing valve structure is shown. Another aspect of the present disclosure provides an operating method of the above-mentioned pressure-stabilizing valve structure, which includes operations S601-S603.

[0100] In operation S601, the electromagnetic switch controlling the valve body portion of the pressure regulating valve structure is de-energized;

[0101] In operation S602, in response to the electromagnetic switch being powered off, the drying section is powered on for heating and the air supply section is used for air supply, and the pressure relief port is opened due to the pressure difference between the inside and outside of the pressure stabilizing valve structure, so that the pressure inside and outside of the pressure stabilizing valve structure are consistent; and

[0102] In operation S603 , the electromagnetic switch of the valve body of the pressure-stabilizing valve structure is energized, and the valve core of the valve core seals the pressure relief port through the suction force exerted by the electromagnetic switch on the valve core of the valve body.

[0103] As mentioned above, combined with Figure 1-Figure 5In the above-mentioned pressure-stabilizing valve structure shown, during the normal storage process of samples and products in the storage space, the electromagnetic switch 160 is always kept in an energized state, so that the valve core 132 of the valve body 100 is attracted, thereby achieving the closure of the pressure relief port and keeping the pressure relief port in a closed state, thereby effectively ensuring the closure of the storage space and preventing internal and external ventilation due to unexpected situations, which may cause damage to the samples or products in the storage space.

[0104] When the storage space is opened, the electromagnetic switch 160 can be directly controlled to cut off the power supply manually, or automatically cut off the power supply in response to the opening of the storage space. At this time, the attraction of the electromagnetic switch 160 to the valve core 132 of the valve body is released, and the valve core 132 can only be affected by the elastic force of its own spring and the gas pressure generated by the internal and external pressure difference. When there is a pressure difference between the inside and the outside, and the external atmospheric pressure is greater than the internal air pressure, the atmospheric pressure on the valve core 132 will cause it to overcome the spring force and separate from the pressure relief port, thereby opening the pressure relief port. In this way, the pressure-stabilizing valve structure is conducted to the outside world, achieving internal and external ventilation until the internal and external air pressure balance is maintained. At this time, the valve core 132 can only be affected by the elastic force of the spring, and the spring pushes the valve core 132 toward the pressure relief port, causing the valve core 132 to close the pressure relief port again, thereby blocking the internal and external ventilation.

[0105] After the storage space is closed, the electromagnetic switch 160 can be directly controlled to be energized, or automatically energized in response to the closure of the storage space. At this time, the valve core 132 is attracted by the electromagnetic switch, thereby achieving the closure of the pressure relief port.

[0106] During ventilation, the air supply unit 200 directly drives the drying unit 300 to supply air to the storage space, quickly achieving internal and external pressure balance. The drying unit 300 also ensures that the air entering the storage space remains dry, effectively preventing any impact on internal storage conditions. Furthermore, the drying unit 300 keeps the air entering the valve body dry, effectively preventing condensation, frost, or even ice from forming inside the valve body, which could freeze the pressure relief vent and make it difficult to open.

[0107] Yet another aspect of the present disclosure provides a storage box, which includes a box cover, a box body, and the above-mentioned pressure-stabilizing valve structure.

[0108] The box cover is used to seal the access opening of the storage box;

[0109] The box body and the box cover are matched to form a storage space for preservation;

[0110] The above-mentioned pressure-stabilizing valve structure is arranged on the box cover or the box body to communicate with the storage space of the box body.

[0111] The preservation box mentioned in the present disclosure can be a storage container for samples or products such as food, microorganisms, etc. that require special preservation conditions (such as high humidity, high heat, high pressure, low temperature, ultra-low temperature, low pressure, etc.), such as refrigerators, cell culture boxes, low-temperature liquid nitrogen storage tanks and ultra-low temperature preservation boxes, etc., without specific restrictions.

[0112] According to an embodiment of the present disclosure, the storage box further includes a conduit, one end of which is connected to the drying part of the pressure-stabilizing valve structure, the main body is arranged in the storage space, and the other end is arranged corresponding to the access port matching the box cover.

[0113] The above-mentioned pressure-stabilizing valve structure disclosed in the present invention can be set on the box cover, so that when the box cover is closed, the pressure-stabilizing valve structure can achieve the effect of pressure relief and stabilization for the storage space in a closed state, and when the box cover is opened, the pressure-stabilizing valve structure can directly communicate with the outside world through the connected conduit corresponding to the take-in and put-out port, that is, the pressure-stabilizing valve structure can be directly connected to the external environment corresponding to the take-in and put-out port due to the opening of the box cover. At this time, the air supply part 200 of the above-mentioned pressure-stabilizing valve structure can be used to supply air to the drying part 300, and the drying part 300 can be heated at the same time, ensuring that the hot and humid air formed by the heating of the desiccant in the drying part 300 is directly discharged to the atmospheric environment corresponding to the take-in and put-out port (outside the storage space) with the help of the conduit on the box cover, so as to achieve the effect of reusing the desiccant in the drying part 300, extend the service life of the desiccant, and at the same time will not affect the storage space due to the heating and drying process.

[0114] So far, the embodiments of the present disclosure have been described in detail with reference to the accompanying drawings.

[0115] The above specific embodiments further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A pressure stabilizing valve structure, wherein: include: Valve body, an air supply portion, one end of which is arranged corresponding to the opening at one end of the valve body portion, and is used to supply air to the pressure-stabilizing valve structure; as well as a drying portion, provided corresponding to the other end of the air supply portion, for drying the supplied air; Wherein, the valve body portion comprises: The valve body has a pressure relief port communicating with the air supply portion and the drying portion, the valve body includes a valve core member, the valve core member includes a valve core housing and a valve core, the valve core is sleeved in the valve core housing; the valve core includes a movable column, a movable head and a spring, the movable column moves along the axial direction of the valve core housing, the movable head is fixedly arranged on the top end of the movable column, the spring is sleeved on the movable column, one end of the spring abuts the center of the inner wall surface of the valve core housing, and the other end abuts the movable head; The electromagnetic switch is provided corresponding to the pressure relief port to seal the pressure relief port when power is on and to open the pressure relief port when power is off.

2. The pressure-stabilizing valve structure according to claim 1, wherein: The valve body comprises: A valve seat connected to the air supply portion and serving as a supporting connection structure at one end of the valve body; The valve housing is matched with the valve seat and sandwiched to form a middle space of the valve body.

3. The pressure-stabilizing valve structure according to claim 2, wherein: The valve core member has a pressure relief port arranged toward the electromagnetic switch, is located in the middle space of the valve body, has one end matched with the valve seat, and the other end matched with the valve shell, and is used to match the electromagnetic switch to close the pressure relief port when the electromagnetic switch of the valve body is energized.

4. The pressure-stabilizing valve structure according to claim 3, wherein: The valve core component includes: The valve core housing is matched with the valve seat and is arranged in the middle space of the valve body; The valve core corresponds to the center of the valve core housing and slides in and out relative to the valve core housing to cooperate with the electromagnetic switch to seal the pressure relief port of the valve core member when the electromagnetic switch is energized; The valve ring is an annular structure, which is arranged corresponding to the valve core and forms the pressure relief port; The valve core seat matches the valve housing and is arranged in the middle space of the valve body.

5. The pressure-stabilizing valve structure according to claim 4, wherein: The valve core housing comprises: At least two mutually symmetrical supporting ribs are evenly arranged along the outer side of the valve core housing, and are used to support the valve core housing in the middle space of the valve body; At least two mutually symmetrically arranged latching teeth are evenly arranged along the outer side of the valve core housing and are used to engage the valve core member with the inner wall surface of the valve housing.

6. The pressure-stabilizing valve structure according to claim 4, wherein: The movable column is sleeved in a movable tube opened in the center of the valve core housing along the axial direction of the valve core housing, and moves in the axial direction along the movable tube.

7. The pressure-stabilizing valve structure according to claim 3, wherein: The valve body further comprises: a sealing gasket, disposed between the valve seat and the valve housing, for sealing a central space of the valve body; A sealing ring is provided between the valve core seat of the valve core member and the valve housing, and is used for sealing the gap between the valve core member and the valve housing.

8. The pressure-stabilizing valve structure according to claim 3, wherein: The electromagnetic switch comprises: a support frame, fixed to the valve seat and the valve housing along the periphery of the valve housing; The electromagnetic column is corresponding to the pressure relief port of the valve core member, is arranged on the support frame, and cooperates with the valve core of the valve core member matching the pressure relief port to seal the pressure relief port when power is turned on.

9. The pressure-stabilizing valve structure according to claim 1, wherein: The air supply unit includes: The fan is arranged in a pipeline communicating between the drying part and the valve body part, and is used for supplying air to the drying part or the valve body part.

10. The pressure-stabilizing valve structure according to claim 1, wherein: The drying section comprises: A filter tube, one end of which is connected to the air supply portion and is filled with a desiccant for drying and filtering the air passing through; The heating block is attached to at least a portion of the outer surface of the filter tube and is used to heat the desiccant filled in the filter tube after being powered on for heating.

11. An operating method for a pressure-stabilizing valve structure according to any one of claims 1 to 10, wherein: include: Controlling the electromagnetic switch of the valve body portion of the pressure-stabilizing valve structure to cut off power; In response to the electromagnetic switch being powered off, the drying section is powered on for heating and the air supply section is used to supply air, and the pressure relief port is opened due to the pressure difference between the inside and outside of the pressure stabilizing valve structure, so that the pressure inside and outside of the pressure stabilizing valve structure are consistent; as well as The electromagnetic switch of the valve body of the pressure-stabilizing valve structure is energized, and the electromagnetic switch exerts a suction force on the valve core of the valve body, so that the valve core of the valve core seals the pressure relief port.

12. A storage box, wherein: include: A box cover, used for sealing the access opening of the storage box; The box body is matched with the box cover to form a storage space for preservation; The pressure-stabilizing valve structure according to any one of claims 1 to 10 is arranged on the box cover or the box body to communicate with the storage space of the box body.

13. The storage box according to claim 12, wherein: Also includes: The conduit has one end connected to the drying portion of the pressure-stabilizing valve structure, a main body arranged in the storage space, and the other end arranged corresponding to the taking-in and putting-out port matched with the box cover.

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