A controllable air path air pump

Abstract

The application relates to the technical field of air pump and gas path control systems, in particular to an air pump with controllable gas path, which is used for solving the problem of high-pressure gas flow impact damage to the gas path caused by instantaneous huge pressure difference when a high-pressure gas tank charges low-pressure air-charging articles. Specifically, a switch control valve driven by a motor is arranged on an airflow channel connecting an air inlet end and an air outlet end. A rotating part of the valve is provided with a through hole and can be switched among at least three working positions by rotating: a second position, the through hole is partially aligned with the airflow channel, a throttling gas path is formed, controllable buffering is realized by dissipating airflow kinetic energy; a first position, the through hole is completely aligned with the airflow channel, a fully-opened gas path is formed to realize rapid charging; and a third position, the through hole is completely misaligned with the airflow channel to close the gas path. The application avoids the problem of airflow structure collapse caused by high-pressure gas flow impact through the throttling gas path.

Description

Technical Field

[0001] This application relates to the field of air pumps and air circuit control systems, and in particular to an air pump with a controllable air circuit. Background Technology

[0002] The existing air pump system typically has the following air circuit connections: one end of the air pump is connected to the air tank via a pipeline, and the other end is connected to the item to be inflated via a pipeline. Built-in switches for controlling the air circuit's on / off state are installed at the air circuit connection points between the air pump and the air tank / item to be inflated.

[0003] However, such systems only offer simple "on / off" binary control, failing to automatically achieve the complete and necessary workflow of "smooth pressure build-up, full-flow inflation, and safe shut-off" within a single operating unit. The system relies heavily on operator experience and procedures, resulting in poor reliability.

[0004] During inflation, the existing dual-phase switch cannot achieve temporary pauses or precise pressure control if the pressure needs to be precisely controlled. Closing the switch completely cuts off the air supply, and reopening it results in another high-pressure impact. When the air supply between the gas tank (high pressure) and the item to be inflated (low pressure) is interrupted, the sudden large pressure difference between the two sides can cause an unbuffered high-pressure airflow impact, which can easily damage the air pump.

[0005] In summary, the existing gas circuit control units are characterized by limited functionality and isolation, which are pressing technical problems that need to be addressed. Utility Model Content

[0006] The purpose of this application is to provide an air pump with a controllable air path to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this application provides the following technical solution:

[0008] A controllable air circuit air pump includes a housing, an air chamber disposed within the housing, and a motor. The air chamber has an inlet end for connecting to an air storage tank and an outlet end for connecting to an inflation interface. An airflow channel is provided within the air chamber to connect the inlet end and the outlet end, and a switch control valve is provided on the airflow channel.

[0009] The switch control valve includes a power input part driven by the motor and a rotating part that is pulsatorically connected to the power input part. The rotating part is rotatably disposed in the airflow channel and is provided with a through hole.

[0010] By driving the rotating part to rotate, the through hole can be switched between the following working positions:

[0011] In the first position, the through hole is fully aligned with the airflow channel to form a fully open air path;

[0012] In the second position, the through hole is at least partially aligned with the airflow channel to form a throttling air path;

[0013] In the third position, the through hole is completely misaligned with the airflow channel to close the air path.

[0014] Furthermore, the airflow channel is provided with a first baffle and a second baffle arranged symmetrically;

[0015] The first baffle is located on the side closer to the gas storage tank, and the second baffle is located on the side closer to the inflation port.

[0016] The rotating part is provided between the first partition plate and the second partition plate, and the first partition plate and the second partition plate are respectively provided with vent holes.

[0017] Furthermore, the air chamber is connected to a first sub-air chamber, which is located on the side near the inflation port, and a first through hole is provided at the connection between the first sub-air chamber and the air chamber.

[0018] A first pressure sensor is installed in the first sub-gas chamber.

[0019] Furthermore, the air chamber is connected to a second sub-air chamber, and a second through hole is provided at the connection between the second sub-air chamber and the air chamber. The second sub-air chamber is located on the side close to the air storage tank.

[0020] A second pressure sensor is installed in the second sub-gas chamber.

[0021] Furthermore, the air inlet end is provided with a first internal thread for adapting and connecting with the external thread of the air tank outlet; the air outlet end is provided with a second internal thread for adapting and connecting with the external thread of the air filling connector.

[0022] Furthermore, the rotating part is a spherical valve or a valve with a curved surface.

[0023] Furthermore, it includes a sealing ring disposed on the outer periphery of the end of the power input portion, and the outer periphery of the sealing ring abuts against the inner wall of the connecting end of the air chamber.

[0024] Furthermore, the connecting end is located in the direction perpendicular to the line connecting the two points of the air inlet and the air outlet; the connecting end is connected to the power input unit.

[0025] Furthermore, it includes a connecting block, one end of which is connected to the power input unit, and the other end of which is connected to the output shaft of the motor.

[0026] Furthermore, the motor is a stepper motor.

[0027] The technical solutions provided in this application have the following advantages compared with the prior art:

[0028] This application provides a controllable air pump that effectively solves the systemic problem of existing air pumps being unable to achieve a safe and complete inflation process due to their single binary control function. Specifically, the control unit can drive the switch control valve to switch between a first position, a second position, and a third position according to actual usage needs. In the second position, the orifice limitation allows the kinetic energy of the high-pressure airflow to be converted into heat energy dissipation through frictional eddies, establishing a smooth pressure drop and preventing damage to the pipeline from high-pressure impacts. After pressure balance, it switches to the first position to ensure inflation efficiency, and can flexibly return to the second position to achieve precise pressure control, finally safely cutting off the airflow in the third position. This design integrates isolated control functions into a collaborative whole, realizing a transition from simple on / off to full-process coordinated operation, significantly improving system reliability, operational safety, and adaptability to operating conditions. Attached Figure Description

[0029] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0030] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0032] Figure 1 This is a schematic diagram of the external structure of the controllable air circuit pump according to an embodiment of this application;

[0033] Figure 2 This is a cross-sectional structural diagram of the controllable air circuit pump according to an embodiment of this application;

[0034] Figure 3 This is a schematic diagram of the rotating part of this application in the first position;

[0035] Figure 4 This is a schematic diagram of the rotating part of this application in the second position;

[0036] Figure 5This is a schematic diagram of the rotating part of this application in the third position;

[0037] Explanation of reference numerals in the attached figures:

[0038] 1. Outer shell;

[0039] 2. Air chamber; 21. Air inlet; 211. First internal thread; 221. Second internal thread; 22. Air outlet;

[0040] 23. Airflow channel; 24. Connecting end;

[0041] 3. Motor;

[0042] 4. Switch control valve; 41. Power input section; 42. Rotating section; 421. Through hole;

[0043] 5. First baffle plate; 51. First vent hole;

[0044] 6. Second baffle plate; 61. Second vent hole;

[0045] 7. First sub-air chamber;

[0046] 8. Second sub-air chamber;

[0047] 9. First pressure sensor

[0048] 10. Second pressure sensor;

[0049] 11. Sealing ring;

[0050] 12. Connecting block. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0052] The following disclosure provides numerous different embodiments or examples for implementing various structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0053] For ease of description, spatial relative terms may be used in the text to describe the relative position or movement of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "back," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure undergoes a positional flip, orientation change, or change of motion, these directional indications will change accordingly. For instance, an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0054] To address the technical problem in existing air pumps where the air circuit control units are functionally singular and isolated, offering only simple "on / off" binary control, and thus failing to automatically achieve the workflow of "stable pressure build-up, full-flow inflation, and safe shut-off" within a single operating unit, resulting in poor operational reliability and susceptibility to high-pressure impacts that damage the air circuit, this invention provides an air pump with a controllable air circuit.

[0055] Detailed, such as Figures 1 to 5 As shown, the air pump of the controllable air circuit includes a housing 1, which has a front housing and a rear housing. After the front housing and the rear housing are assembled, they form an internally hollow cavity. An air chamber 2 and a motor 3 are provided in this cavity. The air chamber 2 has an air inlet 21 for connecting to an air storage tank and an air outlet 22 for connecting to an inflation port. An airflow channel 23 is provided in the air chamber 2 to connect the air inlet 21 and the air outlet 22. A switch control valve 4 is provided on the airflow channel 23. The switch control valve 4 includes a power input part 41 driven by the motor 3 and a rotating part 42 that is pulsatorically connected to the power input part 41. The rotating part 42 is rotatably disposed within the airflow channel 23 and is provided with a through hole 421. By driving the rotating part 42 to rotate, the through hole 421 can be switched between the following working positions: first position A, the through hole 421 is completely aligned with the airflow channel 23 to form a fully open air path; second position B, the through hole 421 is at least partially aligned with the airflow channel 23 to form a throttling air path; third position C, the through hole 421 is completely misaligned with the airflow channel 23 to close the air path. It can be understood that the third position C is also a safety isolation air path.

[0056] It should be noted that in this embodiment, a stepper motor 3 is used as the driving component and is controlled by an external control system. The stepper motor 3 controls the rotation angle of the rotating part 42 by the frequency of the received input pulse (for example, when the input pulse frequency is 30Hz, the rotating part 42 rotates by 15°). When the stepper motor 3 drives the rotating part 42 to rotate 30°, the through hole 421 of the rotating part 42 is exactly at the second position B, which is partially aligned with the airflow channel 23, thus forming a throttling air path. At this time, due to the limiting effect of the throttling air path on the airflow, the airflow from the high-pressure side (air tank side) to the low-pressure side (item side to be filled) is effectively buffered: the high-pressure airflow cannot rush directly into the low-pressure side instantaneously, but flows gradually to the low-pressure side at a controllable flow rate through the flow-limiting path formed by the partial overlap area of ​​the through hole 421 and the airflow channel 23, thereby avoiding damage to the air path structure from instantaneous high-pressure impact.

[0057] In other embodiments, the driving component is not limited to the stepper motor 3, but also includes a servo motor, a geared motor 3, and an angle sensor, etc. The specific structure of the driving component is not limited here, and this part can be adjusted according to actual usage needs. The stepper motor 3 is used as an example in this embodiment only as a preferred embodiment for illustration.

[0058] In one application scenario, the external control system (such as an MCU) does not initially place the switch control valve 4 in the first position, but instead issues a command to the motor 3. The motor 3 starts and drives the rotating part 42 to rotate within the airflow channel 23 via the power input unit 41, so that its through hole 421 is in the second position B, which is only partially aligned with the airflow channel 23.

[0059] At this moment, high-pressure airflow from the gas storage tank rushes in from the inlet 21, but is forced through a narrow throttling orifice. The airflow velocity increases dramatically, generating intense friction and eddies inside and against the orifice wall, converting the ordered impact kinetic energy into disordered heat energy and dissipating it. This throttling air passage establishes a gentle pressure transition zone between the high-pressure inlet 21 and the low-pressure outlet 22, allowing the downstream pressure to rise slowly.

[0060] Once the control system determines that the pressure difference has dropped to a safe range, it instructs motor 3 to drive the rotating part 42 to rotate to the first position A for rapid inflation. After inflation is complete, it rotates to the third position C to shut off the entire air circuit.

[0061] In summary, this technical solution, through the intelligent switching of the switch control valve 4 between three working positions, not only utilizes the second position B to actively dissipate impact energy and protect the gas path, but also achieves fully automated and intelligent management of the entire process from "safe isolation", "stable pressure building", to "efficient gas filling" and finally "safe cut-off", significantly improving the reliability, safety and service life of the system.

[0062] Furthermore, to enable the control system to monitor pressure changes at the inflation end, in a preferred embodiment, the air chamber 2 is connected to a first sub-air chamber 7, which is located near the inflation interface. A first through-hole is provided at the connection between the first sub-air chamber 7 and the air chamber 2. A first pressure sensor 9 is installed in the first sub-air chamber 7. The air chamber 2 is also connected to a second sub-air chamber 8, which is located near the air storage tank. A second pressure sensor 10 is installed in the second sub-air chamber 8. The real-time pressure data fed back by the first pressure sensor 9 and the second pressure sensor 10 together provide the core basis for the control system to judge the pressure difference and decide the timing of switching the operating position of the control valve 4, which is crucial for realizing the above-mentioned automated safety process.

[0063] It should be understood that a first sub-air chamber 7, connected to the main airflow channel 23 via a first through hole, is provided on the side of the air outlet 22 near the inflation port. A first pressure sensor 9 installed here continuously monitors the pressure inside the item to be inflated. The first through hole ensures that the pressure inside the first sub-air chamber 7 quickly balances with the pressure at the inflatable end, while also isolating it from interference from the air pressure of the column airflow in the airflow channel 23, ensuring that the measured pressure is the true static pressure.

[0064] It should also be noted that the structure of the second sub-gas chamber 8 is the same as that of the first sub-gas chamber 7. The second pressure sensor 10 is set up to detect the pressure on the gas storage tank side. Together with the first pressure sensor 9, it provides a basis for the control system to decide when to switch working positions.

[0065] In practical use, for example, at the initial stage of inflation, the control system instructs motor 3 to drive the rotating part 42 to the second position B. At this time, the first pressure sensor 9 detects that the pressure at the end to be inflated begins to rise slowly from the initial low pressure.

[0066] The control system continuously receives real-time pressure values ​​from the first pressure sensor 9 and compares them with the pressure values ​​from the gas storage tank from the second pressure sensor 10. When the control system detects that the pressure at the end to be filled has risen sufficiently close to the pressure in the gas storage tank, i.e., the pressure difference between the two sides has dropped to a preset safety threshold (e.g., the pressure difference is less than 1 Bar), the control system determines that the impact risk has been eliminated.

[0067] At this point, the control system issues a new command, and motor 3 drives the rotating part 42 to rotate from the second position to the first position A. At this time, the airflow resistance is minimal, and the remaining high-pressure gas in the gas tank can pass through quickly, greatly improving the efficiency of the second half of the inflation process.

[0068] During rapid inflation, the first pressure sensor 9 continuously monitors the pressure. When the pressure at the end to be inflated reaches the preset final target pressure value, the control system instructs the motor 3 to drive the rotating part 42 to the third position C, and the inflation process terminates.

[0069] Furthermore, the airflow channel 23 is provided with a first baffle 5 and a second baffle 6 arranged symmetrically; wherein, the first baffle is provided on the side near the gas storage tank, and the second baffle 6 is provided on the side near the inflation port; the rotating part 42 is provided between the first baffle 5 and the second baffle 6, and the first baffle 5 and the second baffle 6 are respectively provided with ventilation holes.

[0070] In the airflow channel 23, a first baffle plate 5 and a second baffle plate 6 are symmetrically fixedly installed. Ventilation holes are respectively provided on these two baffle plates; the ventilation hole on the first baffle plate 5 is defined as the first ventilation hole 51, and the ventilation hole on the second baffle plate 6 is defined as the second ventilation hole 61. The first ventilation hole 51, the second ventilation hole 61, and the through hole 421 on the rotating part 42 disposed therebetween together constitute the through path of the airflow channel 23.

[0071] Specifically, by adjusting the relative positions of the two vents and the through hole 421, three working states are precisely defined:

[0072] like Figure 3 As shown, in the first position A, the motor 3 drives the rotating part 42 to rotate until the axes of its through hole 421 and the vent holes on the first and second baffles 6 are completely aligned, forming a fully open air passage with minimal flow resistance.

[0073] like Figure 4 As shown, in the second position B, when the rotating part 42 rotates until its through hole 421 is only partially aligned with the vent holes on the two baffles, the three parts are connected in series to form a throttling air passage with a drastically reduced cross-sectional area and a complex flow channel shape. The high-pressure airflow is forced to contract, accelerate, and generate violent vortices here, converting kinetic energy into heat energy and dissipating it, thereby achieving smooth buffering.

[0074] like Figure 5 As shown, in the third position C, the through hole 421 of the rotating part 42 is completely misaligned with the vent holes on the two baffles, and the solid wall of the rotating part 42 completely blocks the airflow path to form a closed air passage.

[0075] In addition, the first partition plate 5 and the second partition plate 6 together form a precise space to accommodate the rotating part 42. The ingenuity of this structure lies in the fact that the outer peripheral surface of the rotating part 42 is in contact with the surfaces of the two partition plates, but there is a fitting gap. This design ensures rotational freedom, allowing the rotating part 42 to rotate flexibly under drive without being jammed.

[0076] When the high-pressure airflow drives the rotating part 42 to move axially, the baffles on both sides effectively limit the axial displacement of the rotating part 42 through the contact between their surfaces and the outer peripheral surface of the rotating part 42, ensuring the stability of the geometry of the throttling channel under high pressure impact, thereby ensuring the reliability of the buffering effect.

[0077] In order to ensure that the outer peripheral surface of the rotating part 42 contacts the surfaces of the baffles on both sides without jamming when the rotating part 42 rotates, the rotating part 42 is a ball valve or a valve with a curved surface.

[0078] It should be understood that when the motor 3 drives the spherical or curved valve core to rotate, its smooth and continuous surface always maintains line contact or narrow surface contact with the valve seat or matching seal, which reduces contact friction while ensuring sealing contact and improving the portability of rotation operation.

[0079] Furthermore, a sealing ring 11 is included, which is disposed on the outer periphery of the end of the power input part 41, and the outer periphery of the sealing ring 11 abuts against the inner wall of the connecting end 24 of the air chamber 2.

[0080] When high-pressure gas is introduced into the system, the gas flow will permeate outward through the gap at the connection. At this time, the gas flow pressure will act on the inner side of the sealing ring 11, pushing the sealing ring 11 radially outward, causing the sealing ring 11 to deform radially, thereby blocking the potential leakage channel.

[0081] Furthermore, the air inlet 21 is provided with a first internal thread 211 for adapting and connecting with the external thread of the gas tank outlet; the air outlet 22 is provided with a second internal thread 221 for adapting and connecting with the external thread of the inflation connector.

[0082] It should be understood that this design facilitates the detachable connection and installation of the air tank and inflation connector with the air chamber 2, thereby improving the adaptability of this air pump to different scenarios.

[0083] Furthermore, the connecting end 24 is located in the direction perpendicular to the line connecting the two points of the air inlet end 21 and the air outlet end 22.

[0084] It should be understood that this design makes the internal structure of the air pump more compact, with the air inlet end 21, air outlet end 22 and connection end 24 extending from the air chamber 2, utilizing the internal space of the air pump housing 1 to realize the diverse functions of the air chamber 2.

[0085] In addition, the motor 3 is located on the side of the connection end 24, which spatially separates the interface connecting the motor 3 from the air inlet end 21 and air outlet end 22 of the airflow channel 23, realizing the functional division of the power unit and the airflow unit. This not only facilitates assembly but also reduces mechanical interference between units and improves the stability of the whole machine operation.

[0086] Furthermore, it includes a connecting block 12, one end of which is connected to the power input part 41, and the other end is connected to the output shaft of the motor 3.

[0087] When the air pump is working, high-pressure airflow leaks from the connection between the power input section 41 and the motor 3. To prevent this leakage, a connecting block 12 is installed at this location. One end of the connecting block 12 is connected to the power input section 41, and the other end is connected to the output shaft of the motor 3. This creates a mounting section for the output shaft of the motor 3 inside the connecting block 12 and the power input section 41. The output shaft of the motor 3 passes through the middle of the connecting block 12 and reaches the interior of the power input section 41. Therefore, when the motor 3 starts, the torque of the motor 3's output shaft is smoothly transmitted to the power input section 41 through the connecting block 12, thereby driving the rotating part 42 to rotate. Simultaneously, the reasonable distribution of fasteners on the connecting block 12 ensures that the output torque of the motor 3 is evenly distributed across the entire circumference of the rotating part, avoiding stress concentration and ensuring smooth and reliable power transmission.

[0088] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0089] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application 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. Therefore, they should not be construed as limitations on this application.

[0090] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0091] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0092] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0093] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0094] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Since these modifications and variations fall within the scope of the claims and their equivalents, this application also intends to include these modifications and variations.

[0095] The above describes specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A controllable air circuit air pump, comprising a housing, an air chamber disposed within the housing, and a motor, wherein the air chamber has an inlet end for connecting to an air storage tank and an outlet end for connecting to an inflation interface, characterized in that: The air chamber is provided with an airflow channel connecting the air inlet and the air outlet, and the airflow channel is provided with a switch control valve; The switch control valve includes a power input part driven by the motor and a rotating part that is pulsatorically connected to the power input part. The rotating part is rotatably disposed in the airflow channel and is provided with a through hole. By driving the rotating part to rotate, the through hole can be switched between the following working positions: In the first position, the through hole is fully aligned with the airflow channel to form a fully open air path; In the second position, the through hole is at least partially aligned with the airflow channel to form a throttling air path; In the third position, the through hole is completely misaligned with the airflow channel to close the air path.

2. The air pump with a controllable air path according to claim 1, characterized in that: The airflow channel is provided with a first baffle and a second baffle arranged symmetrically. The first baffle is located on the side closer to the gas storage tank, and the second baffle is located on the side closer to the inflation port. The rotating part is provided between the first partition plate and the second partition plate, and the first partition plate and the second partition plate are respectively provided with vent holes.

3. The air pump with a controllable air path according to claim 1, characterized in that: The air chamber is connected to a first sub-air chamber, which is located on the side near the inflation port. A first through hole is provided at the connection between the first sub-air chamber and the air chamber. A first pressure sensor is installed in the first sub-gas chamber.

4. The air pump with a controllable air path according to claim 2, characterized in that: The air chamber is connected to a second sub-air chamber, and a second through hole is provided at the connection between the second sub-air chamber and the air chamber. The second sub-air chamber is located on the side close to the air storage tank. A second pressure sensor is installed in the second sub-gas chamber.

5. The air pump with a controllable air path according to claim 1, characterized in that: The air inlet end is provided with a first internal thread for adapting and connecting with the external thread of the air tank outlet; the air outlet end is provided with a second internal thread for adapting and connecting with the external thread of the air filling connector.

6. The air pump with a controllable air path according to claim 1, characterized in that: The rotating part is a spherical valve or a valve with a curved surface.

7. The air pump with a controllable air path according to claim 1, characterized in that: It includes a sealing ring, which is disposed on the outer periphery of the end of the power input part, and the outer periphery of the sealing ring abuts against the inner wall of the connecting end of the air chamber.

8. The air pump with a controllable air path according to claim 7, characterized in that: The connecting end is located in the direction perpendicular to the line connecting the two points of the air inlet and the air outlet; The connecting end is connected to the power input unit.

9. The air pump with a controllable air path according to claim 1, characterized in that: It includes a connecting block, one end of which is connected to the power input unit and the other end of which is connected to the output shaft of the motor.

10. The air pump with a controllable air path according to any one of claims 1-9, characterized in that: The motor is a stepper motor.

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