A vacuum-preservation device

Abstract

The application relates to the technical field of vacuumizing equipment, in particular to a vacuumizing and pressure maintaining device which comprises a cover body, a sealing assembly and a vacuumizing host, the cover body is used for being screwed with a tank body, the sealing assembly is arranged on the cover body and is close to the inside of the tank body, a containing cavity of the cover body is connected with the vacuumizing host, a gas path interface of the vacuumizing host is in butt joint communication with the sealing assembly, and the vacuumizing host is used for vacuumizing the inside of the tank body when the cover body is connected with the tank body. The device realizes integrated modular design of the vacuumizing host and the cover body, is convenient to operate and use, and can start working only by screwing the whole vacuumizing and pressure maintaining device on the tank body. By arranging the sealing assembly, installing the vacuumizing and pressure maintaining device on the tank body, and conducting the gas path, vacuumizing can be started, the vacuumizing host can be taken out after vacuumizing, the gas path is closed, and the whole tank body can keep a vacuum state.

Description

Technical Field

[0001] This invention relates to the field of vacuum equipment technology, and in particular to a vacuum pumping and pressure holding device. Background Technology

[0002] In the food and industrial sectors, items are often placed in containers and kept in a vacuum environment to extend their shelf life or prevent oxidation. However, existing vacuum pressure-maintaining devices have many problems, such as complex structures leading to inconvenient operation, poor sealing performance causing gas leaks, and a lack of effective safety protection measures. Using containers to isolate food from the outside air achieves the purpose of vacuum and dehumidification, keeping the food in its proper state and extending its shelf life. Currently, there are two types of products on the market: conventional vacuum bags used with vacuum machines, and Mason jar vacuum machines. Both products have certain limitations in food storage, including leakage problems. After leakage, they cannot automatically vacuum again and cannot maintain pressure for extended periods. Patent application number 202422060390.3 discloses a new type of Mason jar vacuum machine, which vacuums a Mason jar with a special lid in a single operation. However, the diameter of the Mason jar is limited, and leakage can occur over time. Therefore, this invention aims to provide a vacuum pressure-maintaining device with a reasonable structure, simple operation, good sealing performance, and the ability to automatically vacuum after leakage, to meet market demand. Summary of the Invention

[0003] The present invention aims to provide a vacuum pumping and pressure holding device to solve the technical problems of poor sealing, poor pressure holding effect, difficulty in disassembling and maintaining the main unit, and inability to automatically pump vacuum after leakage in the prior art of portable vacuum pumping devices.

[0004] To achieve the above objectives, this invention proposes a vacuuming and pressure-maintaining device, comprising: a cover, a sealing assembly, and a vacuuming main unit. The cover is threadedly connected to a tank. The sealing assembly is disposed on the cover and close to the interior of the tank. The vacuuming main unit is connected to the accommodating cavity of the cover. The air passage interface of the vacuuming main unit is connected to the sealing assembly. The vacuuming main unit is used to evacuate the interior of the tank when the cover is connected to the tank. This device achieves an integrated modular design of the vacuuming main unit and the cover, facilitating operation and ease of use. Simply tighten the entire vacuuming and pressure-maintaining device onto the tank to begin operation. By setting the sealing assembly and installing the vacuuming and pressure-maintaining device on the tank, the air passage is open, allowing vacuuming to begin. After vacuuming, the vacuuming main unit can be removed, closing the air passage and maintaining a vacuum state throughout the tank.

[0005] As an optional implementation, in the vacuum pumping and pressure holding device provided by this invention, the vacuum pumping main unit includes an air pump, an integrated one-way valve, a solenoid valve, a main board, and a pressure detection switch integrated within the main unit housing. The air pump, integrated one-way valve, solenoid valve, and pressure detection switch are all connected to the internal air circuit. The air pump is connected to the integrated one-way valve, and the solenoid valve is connected to the internal air circuit to control the connection and closure of the air circuit. The main board is electrically connected to the air pump, solenoid valve, and pressure detection switch, respectively. The main board controls the operating state of the air pump and solenoid valve based on the pressure signal detected by the pressure detection switch. By integrating the air pump, integrated one-way valve, solenoid valve, main board, and pressure detection switch into the main unit housing, a highly integrated design for vacuum pumping and control is achieved. The air pump is responsible for pumping air, the integrated one-way valve effectively prevents gas backflow to ensure vacuum, the solenoid valve precisely controls the opening and closing of the air circuit, and the closed-loop control system composed of the pressure detection switch and the main board can automatically start and stop the air pump and switch the solenoid valve according to a preset pressure value, achieving automated vacuum pumping and pressure holding without manual intervention, making it intelligent and reliable.

[0006] As an optional implementation, in the vacuum pumping and pressure holding device provided by the present invention, the vacuum pumping host also includes a battery. The battery is electrically connected to the motherboard, and the built-in battery provides an independent power source for the vacuum pumping host, freeing the device from dependence on a fixed power source, improving portability and operability, and making it suitable for various occasions.

[0007] As an optional implementation, in the vacuum and pressure holding device provided by this invention, the main housing includes a shell and a cover, which are joined together to form an accommodating space. The air pump, integrated one-way valve, solenoid valve, main board, air pressure detection switch, and battery are all housed within this accommodating space. By forming the accommodating space through the joining of the shell and cover, all electronic components and mechanical parts are encapsulated in one unit, enhancing structural strength while also providing dust and moisture protection, reducing production costs, and facilitating maintenance.

[0008] As an optional implementation, in the vacuum pumping and pressure holding device provided by this invention, the housing cover is equipped with a button, which is electrically connected to the main board and used to control the start and stop of the vacuum pumping unit. The button connected to the main board enables one-button start or stop of the automated vacuuming process, making operation convenient and improving the user experience.

[0009] As an optional implementation, in the vacuuming and pressure-maintaining device provided by this invention, the sealing assembly includes a backflow valve base, a valve core, a spring, and a sealing sleeve. The backflow valve base is threadedly connected to the cover. The valve core, spring, and sealing sleeve are disposed within the backflow valve base. One end of the valve core is connected to the spring, and the spring is connected to the backflow valve base. The other end of the valve core is tightly fitted with the sealing sleeve, and the sealing sleeve is connected to the gas path interface of the vacuuming host. The sealing assembly employs a backflow valve structure. Normally, the backflow valve is in a closed state. When vacuuming is not required, the solenoid valve is de-energized, and the valve core, under spring action, is tightly fitted with the sealing sleeve in its normal state, closing the gas path and preventing gas backflow, thus enhancing the sealing performance. When the vacuuming host is inserted for vacuuming, the solenoid valve is energized, and the gas path interface of the vacuuming host presses against the backflow valve core, opening the gas path. This design allows the tank to maintain a long-term vacuum level when not in operation.

[0010] As an optional implementation, in the vacuuming and pressure-holding device provided by the present invention, the air inlet of the counterflow valve base, the valve core, the sealing sleeve and the air passage interface of the vacuuming host are coaxially arranged. All related interfaces are coaxially designed, which minimizes airflow resistance, improves pumping efficiency, and ensures component alignment and better sealing.

[0011] As an optional implementation, in the vacuuming and pressure-holding device provided by the present invention, the receiving cavity of the cover is provided with a snap-fit ​​or threaded structure, and the vacuuming main unit is detachably connected to the receiving cavity of the cover through the snap-fit ​​or threaded structure. This structure allows the vacuuming main unit to be easily removed or installed from the cover, greatly improving the maintainability and cleaning convenience of the device. After the vacuuming operation is completed, the vacuuming main unit can be easily removed, and the vacuuming main unit can also be maintained or charged independently, effectively extending the overall service life of the device.

[0012] Compared with existing technologies, the beneficial effects of the present invention are as follows: The vacuum pressure holding device provided by the present invention, by setting up a cover, a sealing component, and a vacuum pumping unit, has the cover for threaded connection with the tank body, the sealing component set on the cover body and close to the inside of the tank body, and the vacuum pumping unit connected to the receiving cavity of the cover body. The air passage interface of the vacuum pumping unit is connected to the sealing component, and the vacuum pumping unit is used to evacuate the inside of the tank body when the cover body is connected to the tank body. This device achieves an integrated modular design of the vacuum pumping unit and the cover body, which is easy to operate and use. Simply tighten the entire vacuum pressure holding device onto the tank body to start working. By setting up the sealing component and installing the vacuum pressure holding device on the tank body, the air passage is open, and vacuuming can begin. After vacuuming is completed, the vacuum pumping unit can be removed, the air passage is closed, and the entire tank body can maintain a vacuum state. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the installation of the vacuum pumping and pressure holding device provided by the present invention;

[0015] Figure 2 This is a schematic diagram of the vacuum pumping and pressure holding device provided by the present invention;

[0016] Figure 3 This is a cross-sectional schematic diagram of the vacuum pumping and pressure holding device provided by the present invention;

[0017] Figure 4 This is a schematic diagram of the structure of the vacuum pumping host provided by the present invention;

[0018] Figure 5 A schematic diagram of the vacuum pumping host provided by the present invention with the shell cover removed;

[0019] Figure 6 The schematic diagram of the gas path control principle provided for this invention.

[0020] [Explanation of Labels in the Attached Image]

[0021] 1. Cover; 11. Receptacle; 2. Sealing assembly; 21. Backflow valve base; 22. Valve core; 23. Spring; 24. Sealing sleeve; 3. Vacuum pump; 31. Air circuit interface; 311. Air circuit; 32. Air pump; 33. Integrated check valve; 34. Solenoid valve; 35. Main board; 36. Air pressure detection switch; 37. Battery; 38. Housing; 39. Housing cover; 391. Button; 4. Tank; 5. Sealing ring. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0023] It should be noted that the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0024] This invention provides a vacuum-sealing and pressure-holding device, such as... Figures 1-6 As shown, the device includes a cover 1, a sealing assembly 2, and a vacuum pump 3. The cover 1 is threaded to a tank 4. The sealing assembly 2 is located on the cover 1 and close to the inside of the tank 4. The vacuum pump 3 is connected to the cavity 11 of the cover 1. The air passage interface 31 of the vacuum pump 3 is connected to the sealing assembly 2. The vacuum pump 3 is used to evacuate the inside of the tank 4 when the cover 1 is connected to the tank 4. This device achieves an integrated modular design of the vacuum pump 3 and the cover 1, which is easy to operate and use. Simply tighten the entire vacuum pumping and pressure-maintaining device onto the tank 4 to start working. By setting the sealing assembly 2 and installing the vacuum pumping and pressure-maintaining device on the tank 4, the air passage 311 is open, and vacuuming can begin. After vacuuming, the vacuum pump 3 can be removed, the air passage 311 is closed, and the entire tank 4 can maintain a vacuum state.

[0025] like Figure 4 and Figure 5 As shown, in the vacuum pumping and pressure holding device provided by the present invention, the vacuum pumping host 3 includes an air pump 32, an integrated one-way valve 33, a solenoid valve 34, a main board 35, and a pressure detection switch 36 integrated within the host housing. The air pump 32, the integrated one-way valve 33, the solenoid valve 34, and the pressure detection switch 36 are all connected to the internal air passage 311, which is a multi-port pipe. The air pump 32 is connected to the integrated one-way valve 33. By setting the integrated one-way valve 33, it is ensured that the gas can only flow in one direction, that is, from the tank 4 to the air pump 32, preventing gas backflow. The solenoid valve 34 is connected to the internal air passage 311 to control the connection and closure of the air passage 311. The main board 35 is electrically connected to the air pump 32, the solenoid valve 34, and the pressure detection switch 36 respectively. The main board 35 controls the working state of the air pump 32 and the solenoid valve 34 according to the pressure signal detected by the pressure detection switch 36. By integrating the air pump 32, integrated one-way valve 33, solenoid valve 34, main board 35, and air pressure detection switch 36 into the main unit housing, a highly integrated design for vacuuming and control is achieved. The air pump 32 is responsible for evacuating air, the integrated one-way valve 33 effectively prevents gas backflow to ensure vacuum, the solenoid valve 34 precisely controls the opening and closing of the air circuit 311, and the closed-loop control system composed of the air pressure detection switch 36 and the main board 35 can automatically start and stop the air pump 32 and switch the solenoid valve 34 according to the preset air pressure value, realizing automated vacuuming and pressure holding without manual intervention, which is intelligent and reliable.

[0026] Furthermore, in the vacuum pumping and pressure holding device provided by the present invention, the vacuum pumping host 3 also includes a battery 37, which is electrically connected to the main board 35. The built-in battery 37 provides an independent power supply for the vacuum pumping host 3, freeing the device from dependence on a fixed power supply, improving portability and operability, and making it suitable for various occasions.

[0027] Furthermore, in the vacuum pressure holding device provided by this invention, the main housing includes a housing 38 and a cover 39. The housing 38 and the cover 39 are joined together to form an accommodating space. The air pump 32, integrated one-way valve 33, solenoid valve 34, main board 35, air pressure detection switch 36, and battery 37 are all disposed within the accommodating space. By forming the accommodating space through the joining of the housing 38 and the cover 39, all electronic components and mechanical parts are encapsulated in one unit, enhancing structural strength while also providing dust and moisture protection, reducing production costs, and facilitating maintenance.

[0028] Furthermore, in the vacuum pumping and pressure-holding device provided by this invention, the cover 39 is provided with a button 391, which is electrically connected to the main board 35 and used to control the start and stop of the vacuum pumping host 3. The button 391, connected to the main board 35, enables one-button start or stop of the automated vacuuming process, making operation convenient and improving the user experience.

[0029] like Figure 3 As shown, in the vacuuming and pressure-holding device provided by the present invention, the sealing assembly 2 includes a counterflow valve base 21, a valve core 22, a spring 23, and a sealing sleeve 24. The counterflow valve base 21 is threadedly connected to the cover 1. The valve core 22, spring 23, and sealing sleeve 24 are disposed inside the counterflow valve base 21. One end of the valve core 22 is connected to the spring 23, and the spring 23 is connected to the counterflow valve base 21. The other end of the valve core 22 is tightly fitted with the sealing sleeve 24. The sealing sleeve 24 is connected to the air passage interface 31 of the vacuuming host 3. The cover 1 is also provided with a sealing ring 5, which is used for sealing connection with the tank 4. The sealing assembly 2 adopts a backflow valve structure. The backflow valve is normally closed. When vacuuming is not required, the solenoid valve 34 is de-energized, and the valve core 22 is tightly fitted with the sealing sleeve 24 under normal conditions through the action of the spring 23, thus closing the gas passage 311 to prevent gas backflow and enhance the sealing performance. When the vacuuming host 3 is inserted to evacuate, the solenoid valve 34 is energized, and the gas passage interface 31 of the vacuuming host 3 presses against the valve core 22 of the backflow valve, opening the gas passage 311. This design allows the tank 4 to maintain a long-term vacuum when not in operation.

[0030] Preferably, in the vacuuming and pressure-holding device provided by the present invention, the air inlet of the counterflow valve base 21, the valve core 22, the sealing sleeve 24 and the air passage interface 31 of the vacuuming host 3 are coaxially arranged. The coaxial design of all related interfaces minimizes airflow resistance, improves pumping efficiency, and ensures component alignment and better sealing.

[0031] In a further preferred embodiment, in the vacuuming and pressure-holding device provided by the present invention, the receiving cavity 11 of the cover 1 is provided with a snap-fit ​​or threaded structure, and the vacuuming host 3 is detachably connected to the receiving cavity of the cover 1 through the snap-fit ​​or threaded structure. This structure allows the vacuuming host 3 to be easily removed or installed from the cover 1, greatly improving the maintainability and cleaning convenience of the device. After the vacuuming operation is completed, the vacuuming host 3 can be easily removed, and the vacuuming host 3 can also be maintained or charged independently, effectively extending the overall service life of the device.

[0032] The principle of the vacuum pumping main unit 3 and control gas path 311 of the vacuum pumping and pressure holding device provided by the present invention is as follows: Figure 6 As shown, specifically: Pressing button 391 on the vacuum pump host 3 activates the air pump 32 on the main board 35, while keeping the solenoid valve 34 closed to ensure the airtightness of the air passage 311. The air pump 32 begins to work, and the integrated one-way valve 33 ensures that the gas can only flow in one direction, from the tank 4 to the air pump 32, preventing gas backflow. Air is drawn from the tank through the air passage interface 31, creating a negative pressure inside the tank. Under the action of the negative pressure, the valve core 22 in the sealing assembly 2 overcomes the force of the spring 23 and is attracted away from the sealing sleeve 24, forming an airflow channel. Air is continuously drawn out of the tank, creating a vacuum environment inside the tank 4. Two air pressure detection switches 36 monitor the air pressure in real time. When the air pressure inside the tank reaches the preset vacuum level, Based on the signal received from the air pressure detection switch 36, the main board 35 controls the air pump 32 to stop working. At the same time, the valve core 22 in the sealing assembly 2 is reset under the action of the spring 23, quickly returns to its original position and tightly re-fits the sealing sleeve 24, cutting off the air passage 311 connection between the inside of the tank and the outside, preventing air backflow, and achieving pressure maintenance. Finally, after the pressure maintenance state inside the tank is established, the user can press the button 391 again. When it is necessary to open the tank 4, the entire device can be unscrewed or the vacuum host 3 can be removed separately for cleaning. The button 391 can be operated to briefly open the solenoid valve 34 to balance the air pressure inside and outside the tank, making it easier to safely open the tank 4. After the pressure is released, the solenoid valve 34 returns to the normally closed state, ready for the next vacuuming operation.

[0033] During the overall control process, the mainboard 35, as the core control unit, is responsible for receiving signals from the air pressure detection switch 36 and controlling the working state of the air pump 32 and solenoid valve 34 according to preset logic to achieve automatic control of functions such as vacuuming, pressure holding, and pressure relief. At the same time, components such as the integrated one-way valve 33 and the counterflow valve also play a crucial auxiliary role, ensuring the sealing of the air circuit 311 and the accuracy of control.

[0034] It should be understood that the above description of specific embodiments of the present invention is only for illustrating the technical approach and features of the present invention, and is intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. However, the present invention is not limited to the specific embodiments described above. All changes or modifications made within the scope of the claims of the present invention should be covered within the protection scope of the present invention.

Claims

1. A vacuum pumping and pressure holding device, characterized in that, The device includes a cover (1), a sealing assembly (2), and a vacuum pump (3). The cover (1) is threaded to the tank (4). The sealing assembly (2) is located on the cover (1) and close to the inside of the tank (4). The vacuum pump (3) is connected to the accommodating cavity (11) of the cover (1). The air passage interface (31) of the vacuum pump (3) is connected to the sealing assembly (2). The vacuum pump (3) is used to evacuate the inside of the tank (4) when the cover (1) is connected to the tank (4).

2. The vacuum pumping and pressure holding device according to claim 1, characterized in that, The vacuum pumping host (3) includes an air pump (32), an integrated one-way valve (33), a solenoid valve (34), a main board (35), and a pressure detection switch (36) integrated in the host housing. The air pump (32), the integrated one-way valve (33), the solenoid valve (34), and the pressure detection switch (36) are all connected to the internal air circuit (311). The air pump (32) is connected to the integrated one-way valve (33), and the solenoid valve (34) is connected to the internal air circuit (311) to control the connection and closure of the air circuit (311). The main board (35) is electrically connected to the air pump (32), the solenoid valve (34), and the pressure detection switch (36) respectively. The main board (35) controls the working state of the air pump (32) and the solenoid valve (34) according to the pressure signal detected by the pressure detection switch (36).

3. The vacuum pumping and pressure holding device according to claim 2, characterized in that, The vacuum pumping host (3) also includes a battery (37), which is electrically connected to the motherboard (35).

4. The vacuum pumping and pressure holding device according to claim 3, characterized in that, The main unit housing includes a housing (38) and a cover (39), which are joined together to form a receiving space. The air pump (32), integrated one-way valve (33), solenoid valve (34), main board (35), air pressure detection switch (36) and battery (37) are all located in the receiving space.

5. The vacuum pumping and pressure holding device according to claim 4, characterized in that, The cover (39) is provided with a button (391), which is electrically connected to the motherboard (35) and is used to control the start and stop of the vacuum pumping host (3).

6. The vacuum pumping and pressure holding device according to claim 1, characterized in that, The sealing assembly (2) includes a counterflow valve base (21), a valve core (22), a spring (23), and a sealing sleeve (24). The counterflow valve base (21) is connected to the cover (1) by a thread. The valve core (22), the spring (23), and the sealing sleeve (24) are located inside the counterflow valve base (21). One end of the valve core (22) is connected to the spring (23), and the spring (23) is connected to the counterflow valve base (21). The other end of the valve core (22) is tightly fitted to the sealing sleeve (24). The sealing sleeve (24) is connected to the gas path interface (31) of the vacuum pump host (3).

7. The vacuum pumping and pressure holding device according to claim 6, characterized in that, The air inlet of the counterflow valve base (21), the valve core (22), the sealing sleeve (24) and the air passage interface (31) of the vacuum host (3) are coaxially arranged.

8. The vacuum pumping and pressure holding device according to claim 1, characterized in that, The cover (1) has a snap or threaded structure in its accommodating cavity (11), and the vacuum pumping host (3) is detachably connected to the accommodating cavity of the cover (1) through the snap or threaded structure.

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