Inflation and deflation integrated air pump

Abstract

The utility model discloses an inflating and deflating integrated air pump which is used for inflating and deflating an inflating object and comprises a high-pressure air pump assembly, a low-pressure air pump assembly and a reversing valve assembly arranged between the high-pressure air pump assembly and the low-pressure air pump assembly. A first piston is arranged on the valve rod; the first air inlet and the second air inlet are formed in the axial direction in a left-right spaced mode. Wherein the first piston is configured to move between a first position for sealing the first air inlet and a second position for sealing the second air inlet so as to switch an inflation state and a deflation state, and the first piston is in clearance fit with the cavity wall of the first valve cavity so as to prevent friction between the first piston and the cavity wall when the first piston moves; the clearance fit design is adopted between the piston and the cavity wall of the valve cavity, so that poor sealing caused by friction of the piston in the moving process is effectively reduced, and the service life of equipment is further prolonged.

Description

Technical Field

[0001] This utility model relates to the field of air pump device technology, and in particular to an integrated air pump for charging and discharging. Background Technology

[0002] As people's living standards improve, some outdoor enthusiasts enjoy sports like SUP (Sports Up), surfing, and other similar activities. This has led to the emergence of inflatable outdoor products on the market. These products are characterized by their portability and ease of storage, making them popular among outdoor enthusiasts. Examples include SUPs, inflatable surfboards, inflatable beds, inflatable tents, and inflatable sofas. There are many types of air pumps on the market, including low-pressure pumps, high-pressure pumps, and low-to-high-pressure conversion pumps. However, inflation and deflation are achieved by changing the air hose connector. For example, when inflating, the air hose connector is attached to the inflation nozzle; when deflation is needed, the air hose is switched to the air inlet nozzle. This is inconvenient for users, and if the two nozzles are not distinguished, it is easy to connect the wrong one. With continuous technological advancements, air pump devices capable of simultaneous inflation and deflation have gradually appeared on the market. However, these devices are often complex in structure and bulky. Furthermore, due to unreasonable design of the reversing mechanism, problems such as jamming and air leakage can easily occur during use, affecting the reliability and lifespan of the equipment. Especially during the reversing process, the friction between the piston and the valve chamber wall not only increases energy consumption, but also accelerates the wear of parts, leading to a decline in equipment performance.

[0003] Existing technology, such as the integrated charging and discharging air pump disclosed in application number 202321772065.9, only requires switching the valve stem between the first and second positions to achieve the switching of charging and discharging, effectively improving the technical problem that existing air pumps achieve charging and discharging by changing different air ports. However, in this application, the sealing end of the reversing valve module and the valve body achieve the switching of the charging and discharging air path through mutual friction. The wear of its sealing end is relatively large, and long-term use may lead to the failure of the sealing end, thus failing to guarantee the long-life switching operation requirements of the entire mechanism. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide an integrated air pump for charging and decharging. This air pump needs to be able to efficiently switch between charging and decharging states, while reducing the friction of the piston during movement, so as to improve the overall performance and service life of the equipment.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] An integrated inflation and deflation air pump for inflating and deflating inflatable materials includes a high-pressure air pump assembly, a low-pressure air pump assembly, and a reversing valve assembly disposed between the high-pressure air pump assembly and the low-pressure air pump assembly. The reversing valve assembly includes:

[0007] A valve stem extending along an axial direction, the valve stem having a first piston; and

[0008] The first valve chamber has a first air inlet and a second air inlet arranged at a left-right interval along the axial direction.

[0009] The first piston is configured to move between a first position that closes the first air inlet and a second position that closes the second air inlet to switch between an inflation state and a deflation state. The first piston and the cavity wall of the first valve chamber are clearance-fitted to prevent friction between the piston and the cavity wall during its movement.

[0010] Furthermore, the first piston has two first side seals arranged at intervals in the axial direction, the two first side seals being adapted to respectively close the first air inlet and the second air inlet.

[0011] Furthermore, the first piston forms a first circumferential seal on its outer periphery, which is adapted to seal the first air inlet and the second air inlet.

[0012] Furthermore, the directional valve assembly also includes:

[0013] A second piston is disposed on the valve stem, the second piston and the first piston being arranged at a distance; and

[0014] The second valve chamber has a first air outlet and a second air outlet arranged at a left-right interval along the axial direction.

[0015] The second piston is configured to move between a third position that closes the first air outlet and a fourth position that closes the second air outlet to switch between an inflation state and an deflation state, and the walls of the second piston and the second valve chamber are fitted with a clearance.

[0016] Furthermore, the second piston has two second side seals arranged at intervals in the axial direction, which are adapted to close the first air outlet and the second air outlet respectively.

[0017] Furthermore, the second piston forms a second circumferential seal on its outer periphery, which is adapted to seal the first and second air outlets.

[0018] Furthermore, the valve stem includes a second section adapted to mount the first piston and a first section adapted to mount the second piston, wherein the first section and the second section are arranged integrally or separately.

[0019] Furthermore, the valve stem also includes a guide rod portion, and a return spring is disposed between the guide rod portion and the first valve chamber.

[0020] Furthermore, the reversing valve module also includes a transmission mechanism that is drivenly connected to the guide rod portion.

[0021] Furthermore, both the low-pressure air pump assembly and the high-pressure air pump assembly are equipped with one-way valves.

[0022] Due to the adoption of the above technical solutions, this utility model has the following beneficial effects:

[0023] 1. This utility model, through its designed reversing valve assembly, enables rapid switching between inflation and deflation states. The clearance fit design between the first piston and the cavity wall of the first valve chamber effectively reduces piston friction during movement, lowers energy consumption, and prevents friction between the piston and the valve body cavity wall during valve body movement, thus avoiding poor sealing and extending the equipment's service life. This design also reduces heat and wear generated by friction, improving the equipment's stability and reliability.

[0024] 2. The integrated inflation and deflation air pump of this utility model integrates a high-pressure air pump assembly, a low-pressure air pump assembly, and a reversing valve assembly, thereby achieving functional integration and structural optimization. Both the low-pressure air pump assembly and the high-pressure air pump assembly are equipped with one-way valves, which further ensures the unidirectional flow of gas during inflation and deflation, prevents gas backflow and leakage, and improves the performance and stability of the equipment.

[0025] 3. By configuring a transmission mechanism and a return spring, this utility model enables the reversing valve assembly to achieve more automated operation. This reduces the need for manual intervention and improves work efficiency and safety. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly introduced below. Obviously, the drawings described below only involve some embodiments of this utility model, and are not intended to limit this utility model.

[0027] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0028] Figure 2 This is an internal structural diagram of the reversing valve assembly of this utility model.

[0029] Figure 3 This is a structural diagram of the first embodiment of the valve stem of this utility model.

[0030] Figure 4 This is a detailed drawing of the first embodiment of the valve stem of this utility model.

[0031] Figure 5 This is a structural diagram of another first embodiment of the valve stem of this utility model, with a piston.

[0032] Figure 6 This is a structural diagram of another first embodiment of the valve stem of this utility model.

[0033] Figure 7 This is a diagram of the air circuit structure for the low-pressure air pump assembly of this utility model.

[0034] Figure 8 This is a diagram of the air circuit structure for the high-pressure air pump assembly of this utility model.

[0035] Figure 9 This is a diagram of the gas venting structure of this utility model.

[0036] Figure label:

[0037] In the diagram, 100 is the low-pressure air pump assembly; 200 is the high-pressure air pump assembly.

[0038] 300. Reversing valve assembly; 310. Valve stem; 311. First section; 312. Second section; 313. Mounting part; 314. Guide rod part; 315. Return spring; 320. Second piston; 321. Second side seal; 330. First valve chamber; 340. First air inlet; 350. Second air inlet; 360. First piston; 361. First side seal; 370. Second valve chamber; 380. First air outlet; 390. Second air outlet. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings. The components of the embodiments of this utility model described and shown in the accompanying drawings can be arranged and designed in various different configurations. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0040] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0041] Unless otherwise defined, the technical or scientific terms used in this patent document shall have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model patent specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "an," "a," or "the" do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" indicate that the element or object preceding "comprising" encompasses the element or object listed following "comprising" or its equivalents, and do not exclude other elements or objects. Terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" are used only to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0042] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0043] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the features in the following embodiments can be combined with each other.

[0044] Please see Figures 1-3This utility model discloses an integrated inflation and deflation air pump for efficient inflation and deflation of inflatable objects. The air pump mainly includes a high-pressure air pump assembly 200, a low-pressure air pump assembly 100, and a reversing valve assembly 300 disposed between the two. The high-pressure air pump assembly 200 provides high-pressure gas for inflation, while the low-pressure air pump assembly 100 provides necessary deflation during deflation. The reversing valve assembly 300 is the core component of this utility model, responsible for switching between inflation and deflation states. The reversing valve assembly 300 includes a valve stem 310 extending along an axial direction, a first piston 360 disposed on the valve stem 310, and a first valve chamber 330, with a first air inlet 340 and a second air inlet 350 spaced laterally along the axial direction. The first piston 360 is configured to move between a first position closing the first air inlet 340 and a second position closing the second air inlet 350 to switch between inflation and deflation states. Furthermore, the reversing valve assembly 300 also includes a second piston 320 and a second valve chamber 370 disposed on the valve stem 310. The second piston 320 and the first piston 360 are arranged at intervals. The second valve chamber 370 has a first air outlet 380 and a second air outlet 390 arranged axially at intervals. The second piston 320 is configured to move between a third position closing the first air outlet 380 and a fourth position closing the second air outlet 390 to switch between an inflation state and a deflation state. The walls of the second piston 320 and the second valve chamber 370 are also fitted with a clearance. Specifically, the first piston 360 is disposed at approximately one-third of the valve stem 310 from the right, and the second piston 320 is disposed at approximately two-thirds of the valve stem 310 from the right.

[0045] It should be noted that in this embodiment, the first air inlet 340 and the second air inlet 350 are referenced to the first valve chamber. The first air inlet 340 supplies air into the first valve chamber when the air pump is in the charging state, and the second air inlet 350 supplies air into the first valve chamber when the air pump is in the deflating state. Furthermore, the first air outlet 380 and the second air outlet 390 are referenced to the second valve chamber 370. When the air pump is in the charging state, the second air outlet 390 is configured to discharge air from the second valve chamber 370, and when the air pump is in the deflating state, the first air outlet 380 is configured to discharge air from the second valve chamber 370.

[0046] The valve stem 310 of this invention is provided with a first piston 360, which is movable within a first valve chamber 330. The first valve chamber 330 has a first air inlet 340 and a second air inlet 350 arranged axially at left-right intervals. The first piston 360 is configured to move left-right between a first position closing the first air inlet 340 and a second position closing the second air inlet 350, thereby switching between charging and depressurizing states. Furthermore, the first piston 360 and the chamber wall of the first valve chamber 330 are designed with a clearance fit. This ingenious structural design avoids direct contact between the piston and the chamber wall during movement, significantly reducing frictional loss, extending the service life of the air pump, and also reducing energy consumption and noise, while improving the overall operational stability and reliability.

[0047] Please see Figure 4In this embodiment, the first piston 360 has two first side sealing portions 361 arranged axially spaced apart on the valve stem 310. These two first side sealing portions 361 are adapted to respectively seal the first air inlet 340 and the second air inlet 350. Specifically, when one first side sealing portion 361 moves to the left, it gradually comes into contact with the first air inlet 340 and the first air outlet 380, with its side surface sealing the first air inlet 340. When the other first side sealing portion 361 moves to the right, it gradually comes into contact with the second air inlet 350, with its side surface sealing the second air inlet 350. Furthermore, the second piston 320 has two second-side sealing portions 321 arranged axially at intervals. These two second-side sealing portions 321 are adapted to respectively seal the first air outlet 380 and the second air outlet 390. The principle by which the two second-side sealing portions 321 block the second air outlet 390 is the same as the principle by which the first piston 360 blocks the first air inlet 340 and the second air inlet 350, and will not be elaborated further here. In this embodiment, the sealing portion is an annular sealing plate. A mounting portion 313 is disposed on the valve stem 310, which is adapted to mount the annular sealing plate. Since the inlet / outlet ports of the first valve chamber 330 and the second valve chamber 370 are cylindrical, in other embodiments, the first piston 360 may also form a first circumferential sealing portion on its outer periphery. This first circumferential sealing portion is adapted to enter the first air inlet 340 and the second air inlet 350 to seal them. It should be noted that the first and second circumferential sealing portions entering the first air inlet 340 and the second air inlet 350 means that they are completely inserted into the first air inlet 340 and the second air inlet 350 in the thickness direction to achieve sealing, without excessive mutual friction between them. Alternatively, the second piston 320 may also form a second circumferential sealing portion on its outer periphery. The principle and method of sealing the first air outlet 380 and the second air outlet 390 by this second circumferential sealing portion are the same as those of the first piston 360, and will not be elaborated further here.

[0048] Please see Figure 5 , Figure 6 In this embodiment, the valve stem 310 includes a first section 311 adapted to mount the second piston 320 and a second section 312 adapted to mount the first piston 360. The first section 311 and the second section 312 are separately arranged and have the same structure. Please refer to [link / reference]. Figure 1In other embodiments, the first segment 311 and the second segment 312 may also be integrally arranged. Further, the valve stem 310 also includes a guide rod portion 314, which is configured to actuate the valve stem 310. The reversing valve module also includes a transmission mechanism tractively connected to the guide rod portion 314, which is configured to move linearly to achieve the extension and retraction of the guide rod portion 314, thereby controlling the first piston 360 and the second piston 320 to block the first air inlet 340, the first air outlet 380, the second air inlet 350, and the second air outlet 390. A return spring 315 is disposed between the guide rod portion 314 and the first valve chamber 330, which is configured to keep the valve stem 310 in a predetermined position without external force. It should be noted that the guide rod portion 314 may also be integrally arranged with the first segment 311 and the second segment 312 or arranged separately; this will not be elaborated further here.

[0049] Please see Figures 7-8 In this embodiment, both the low-pressure air pump assembly 100 and the high-pressure air pump assembly 200 are equipped with one-way valves. When the low-pressure air pump assembly 100 is working, the first piston 360 blocks the second air inlet 350, and the second piston 320 blocks the first air outlet 380. The high-pressure air pump assembly 200 stops working, and its built-in one-way valve closes. External gas enters the first valve chamber 330 from the first air inlet 340 and then enters the low-pressure air pump. It then enters the second valve chamber 370 through the opening of the low-pressure air pump one-way valve, and finally flows out of the second valve chamber 370 from the second air outlet 390 before flowing into the container, thus completing the low-pressure inflation process. Further, when the container pressure reaches the set pressure value, the low-pressure air pump stops working, and the low-pressure air pump one-way valve closes. Gas from the high-pressure air pump enters the container and inflates until the set pressure value is reached, completing the entire inflation process. Please refer to [link to relevant documentation]. Figure 9 When the venting control signal is issued, the guide rod 314 in the valve group is actuated, controlling the valve rod 310 to move. The first piston 360 blocks the first air inlet 340, and the second piston 320 blocks the second air outlet 390. The low-pressure air pump starts working, and the built-in check valve of the high-pressure air pump closes. The gas in the container enters the first valve chamber 330 through the second air inlet 350 and then enters the low-pressure air pump. The check valve of the low-pressure air pump opens, and the gas enters the second valve chamber 370 and is discharged through the open first air outlet 380 until a certain negative pressure is formed in the container, completing the venting process.

[0050] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A charge-discharge integrated air pump for inflating and deflating an inflatable object, comprising a high-pressure air pump assembly, a low-pressure air pump assembly, and a change-over valve assembly disposed between the high-pressure air pump assembly and the low-pressure air pump assembly, characterized in that, The reversing valve assembly comprises: a valve stem extending in an axial direction, the valve stem having a first piston thereon; and a first valve cavity, a first intake port and a second intake port being arranged left and right in the axial direction; wherein the first piston is configured to move between a first position closing the first intake port and a second position closing the second intake port to switch between a charging state and a discharging state, the first piston and a cavity wall of the first valve cavity being in a clearance fit to prevent friction with the cavity wall when the first piston moves.

2. The gas charging and discharging integrated pump according to claim 1, wherein, The first piston has two first side sealing portions arranged in the axial direction, the two first side sealing portions being adapted to close the first intake port and the second intake port respectively.

3. The gas charging and discharging integrated pump according to claim 1, wherein, The first piston has a first circumferential sealing portion formed on an outer periphery thereof, the first circumferential sealing portion being adapted to seal the first intake port and the second intake port.

4. The gas charging and discharging integrated pump according to claim 1, wherein, The reversing valve assembly further comprises: a second piston arranged on the valve stem, the second piston being arranged apart from the first piston; and a second valve cavity, a first exhaust port and a second exhaust port being arranged left and right in the axial direction; wherein the second piston is configured to move between a third position closing the first exhaust port and a fourth position closing the second exhaust port to switch between the charging state and the discharging state, the second piston and a cavity wall of the second valve cavity being in a clearance fit.

5. The gas charging and discharging integrated pump according to claim 4, characterized in that, The second piston has two second side sealing portions arranged in the axial direction, the two second side sealing portions being adapted to close the first exhaust port and the second exhaust port respectively.

6. The gas charging and discharging integrated pump according to claim 4, wherein, The second piston has a second circumferential sealing portion formed on an outer periphery thereof, the second circumferential sealing portion being adapted to seal the first exhaust port and the second exhaust port.

7. The gas charging and discharging integrated pump according to claim 4, wherein, The valve stem comprises a first section adapted to mount the first piston and a second section adapted to mount the second piston, the first section and the second section being arranged integrally / separately.

8. The gas charging and discharging integrated pump according to claim 7, characterized in that, The valve stem further comprises a guide stem portion, a return spring being arranged between the guide stem portion and the first valve cavity.

9. The gas charging and discharging integrated pump according to claim 8, characterized in that, The reversing valve assembly further comprises a transmission mechanism in transmission connection with the guide stem portion.

10. The gas charging and discharging integrated pump according to claim 8, characterized in that, The low-pressure air pump assembly and the high-pressure air pump assembly are each provided with a one-way valve.

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