A wire-controlled air pump for multi-chamber inflatable products and its control method

Abstract

The present invention relates to a wire-controlled air pump for multi-chamber inflatable products and a control method thereof. A movable L-shaped switching pipe and a pressure sensor for detecting the air pressure data of the inflatable product are arranged in the air pump. When the air pressure data monitored by the pressure sensor during inflation rises to a preset first threshold value, the inflation of the secondary air chamber of the inflatable product is aborted and the inflation of the main air chamber is maintained; when the air pressure data monitored by the pressure sensor rises to a preset second threshold value, the inflation of the main air chamber is stopped and the inflation of the secondary air chamber is continued; when the air pressure data monitored by the pressure sensor rises to a preset third threshold value, the inflation of the main air chamber and each secondary air chamber is stopped. The present invention enables the air pump to not only perform inflation and deflation on multiple air chambers of the inflatable product, but also has a simple structure, and avoids the situation of excessive expansion of the relatively small secondary air chamber when inflating the main air chamber and the secondary air chamber of the inflatable product.

Description

Technical Field

[0001] The present invention relates to the technical field of air pumps for inflatable products, and in particular, to a wire-controlled air pump for multi-chamber inflatable products and a control method thereof. Background Art

[0002] At present, the air pumps of the prior art are commonly used in cooperation with inflatable products. The air pump is installed inside the inflatable product to achieve automatic inflation of the inflatable product. Some large inflatable products are fixed with an inflation air pump, and the inflation air pump is provided with an air inlet. During inflation, the air inlet is opened, and the inflation air pump can fill the inner cavity of the inflatable product with gas. After inflation is completed, the air inlet is closed to prevent the gas inside the inflatable product from leaking. When it is necessary to deflate the inflatable product, the deflation function of the air pump can be started to automatically discharge the gas inside the inflatable product. With the increase in market demand, there are more and more inflatable products with multiple air chambers, such as inflatable sofas, inflatable beds, inflatable dolls, inflatable boats, etc. composed of multiple inflatable parts. Generally, the largest part of such products is used as the main air chamber, and the remaining smaller parts are used as auxiliary air chambers. Before use, the main air chamber and each auxiliary air chamber need to be inflated separately to reach the appropriate degree of expansion before they can be used normally. On the contrary, when disassembling, the main air chamber and each auxiliary air chamber also need to be deflated separately, and only after deflation can the inflatable product be disassembled and stored.

[0003] However, at present, for inflatable products with multiple air chambers, most of them adopt the method of installing air pumps separately to inflate and deflate each air chamber respectively. This method will result in a large number of air pumps installed in one inflatable product, with high costs. Although there are also some inflatable products that only install one air pump, the air flow channels inside the air pump are numerous, the structure is relatively complex, and when controlling inflation, it simply inflates all air chambers to the end, without considering the important factor that there is a large difference in volume between the main air chamber and the auxiliary air chambers of the inflatable product. As a result, during the inflation process, it often occurs that each auxiliary air chamber has already been over-expanded, while the main air chamber has not been fully inflated, so the air pump has to continue to output gas to the entire inflatable product. This inflation method is often not conducive to the service life of each auxiliary air chamber of the inflatable product, and in severe cases, it may even cause the auxiliary air chamber to burst. Summary of the Invention

[0004] In view of this, the present invention provides a wire-controlled air pump for multi-chamber inflatable products and an inflation method thereof, enabling the air pump to not only inflate and deflate multiple air chambers of the inflatable product, with a simple structure, but also the inflation method of the air pump takes into account the factor that there is a large difference in volume between the main air chamber and the auxiliary air chambers of the inflatable product, avoiding the situation of over-expansion of the smaller auxiliary air chambers when inflating the main air chamber and the auxiliary air chambers of the inflatable product.

[0005] A wire-controlled air pump for multi-chamber inflatable products according to the present invention includes a mounting shell for being embedded in the inner cavity of the inflatable product. A fan and a control system are arranged in the mounting shell, and an external air port is opened on one side of the mounting shell exposed outside the inflatable product.

[0006] A main chamber air supply port and a plurality of sub-chamber air supply ports are opened on one side of the mounting shell located in the inner cavity of the inflatable product. A main air chamber valve and a sub-air chamber valve are respectively arranged at the main chamber air supply port and the sub-chamber air supply ports.

[0007] An L-shaped switching pipe controlled to move by the control system is movably arranged in the mounting shell. One end of the L-shaped switching pipe is connected to the main chamber air supply port and each sub-chamber air supply port together, and the other end of the L-shaped switching pipe is respectively connected to the air suction end and the air exhaust end of the fan through different displacement positions.

[0008] A pressure sensor is arranged in the mounting shell, and the control system detects the air pressure data of the inflatable product through the pressure sensor.

[0009] Wherein, when the L-shaped switching pipe is connected to the air exhaust end of the fan, external air sequentially passes through the external air port and the L-shaped switching pipe and enters the main chamber air supply port and each sub-chamber air supply port respectively to inflate the main air chamber and each sub-air chamber of the inflatable product.

[0010] When the L-shaped switching pipe is connected to the air suction end of the fan, the air in the main air chamber and each sub-air chamber of the inflatable product respectively enters the L-shaped switching pipe through the main chamber air supply port and each sub-chamber air supply port and is discharged through the external air port.

[0011] A wire-controlled air pump for multi-chamber inflatable products according to the present invention

[0012] A Z-shaped partition board is arranged in the mounting shell. The Z-shaped partition board includes an upper horizontal board, a lower horizontal board, and an intermediate vertical board connected between the upper horizontal board and the lower horizontal board.

[0013] Blowing chambers and air suction chambers are defined inside the mounting shell on opposite sides of the upper horizontal board. An air exchange chamber is defined inside the mounting shell on one side of the intermediate vertical board, and the blowing chamber and the air exchange chamber, and the air suction chamber and the air exchange chamber are respectively separated by the intermediate vertical board.

[0014] The external air port is connected to the air exchange chamber. An inflation hole communicating with the blowing chamber and an exhaust hole communicating with the air suction chamber are opened on the intermediate vertical board. One end of the L-shaped switching pipe is respectively connected to the exhaust hole and the inflation hole through different displacement positions.

[0015] The fan includes a centrifugal impeller. The centrifugal impeller is arranged in the blowing chamber and the air suction end in the middle of the centrifugal impeller is connected to the air suction chamber.

[0016] According to the invention, a wire-controlled air pump for multi-chamber inflatable products: the upper side facing the ventilation cavity is divided into an air collection cavity in the mounting shell, which is connected to the main chamber air supply port and each auxiliary chamber air supply port;

[0017] The lower horizontal plate is provided with a vertical pipe connected to the air collecting cavity; the inflation holes and the exhaust holes are arranged in a straight line along the extension direction of the vertical pipe;

[0018] One end of the L-shaped switching tube is slidably sleeved in the vertical pipe and connected to the air collecting cavity, so that the L-shaped switching tube can be moved back and forth along the vertical pipe in a straight line. The L-shaped switching tube is moved back and forth along the vertical pipe in a straight line to different positions so that the other end of the L-shaped switching tube can be connected to the inflation hole and the exhaust hole respectively.

[0019] According to a wire-controlled air pump for multi-chamber inflatable products of the present invention: a first annular plate is integrally formed on the top of the upper horizontal plate, the first annular plate vertically extends to the inner wall of the mounting shell and surrounds the inner wall of the mounting shell to form the blowing cavity; the upper horizontal plate and the middle vertical plate respectively extend to the inner wall of the mounting shell and surround the inner wall of the mounting shell to form the suction cavity; the upper horizontal plate is provided with a conducting hole connecting the blowing cavity and the suction cavity;

[0020] The fan further comprises a motor, and the motor and the centrifugal impeller are respectively located in the air suction cavity and the air blowing cavity and are coaxially connected to each other through the conducting hole.

[0021] According to a wire-controlled air pump for multi-chamber inflatable products of the present invention: a motor mounting plate is arranged in the air pumping cavity, the motor mounting plate corresponds to the conducting hole and is spaced a certain distance from the bottom of the upper horizontal plate;

[0022] A plurality of connecting plates are fixedly connected between the upper horizontal plate and the motor mounting plate, and each of the connecting plates surrounds the central axis of the conducting hole and is spaced apart from each other by a gap;

[0023] The motor mounting plate is provided with a plurality of screw holes and a rotating shaft hole for allowing the output shaft of the motor to pass through.

[0024] According to a wire-controlled air pump for a multi-chamber inflatable product of the present invention: a second annular plate is integrally formed at the bottom of the lower horizontal plate, and the second annular plate vertically extends to the inner wall of the mounting shell and encloses the inner wall of the mounting shell to form the air collection cavity.

[0025] According to the invention, a wire-controlled air pump for multi-chamber inflatable products: a supplementary tube is integrally formed on the lower horizontal plate, and the ventilation chamber and the air extraction chamber are connected through the supplementary tube;

[0026] When the L-shaped switching pipe is butted against the inflation hole, the port of the supplementary pipe located in the air exchange cavity is in an open state; when the L-shaped switching pipe is butted against the exhaust hole, the bottom plane of the L-shaped switching pipe covers and closes the port of the supplementary pipe located in the air exchange cavity.

[0027] For the control method of the air pump based on the present invention, when it is necessary to inflate the main air chamber and all auxiliary air chambers of the inflatable product, the main air chamber valve and the auxiliary air chamber valve are opened through the control system, the fan is started, and the displacement position of the L-shaped switching pipe is controlled to connect the L-shaped switching pipe to the exhaust end of the fan, so as to drive external air to enter the air pump from the external air port and enter the main chamber air supply port and each auxiliary chamber air supply port through the L-shaped switching pipe, and the main air chamber and each auxiliary air chamber of the inflatable product are inflated through the main chamber air supply port and each auxiliary chamber air supply port respectively;

[0028] During the inflation process, when the air pressure data monitored by the air pressure sensor rises to a preset first threshold value, the control system closes each auxiliary air chamber valve to abort the inflation of each auxiliary air chamber of the inflatable product, and at the same time the control system keeps the main air chamber valve open to keep inflating the main air chamber of the inflatable product;

[0029] When the air pressure data monitored by the air pressure sensor rises to a preset second threshold value, the control system closes the main air chamber valve to stop inflating the main air chamber of the inflatable product, and at the same time the control system re-opens each auxiliary air chamber valve to continue inflating each auxiliary air chamber of the inflatable product;

[0030] When the air pressure data monitored by the air pressure sensor rises to the preset second threshold value again or reaches the preset third threshold value, the control system shuts down the fan and closes each auxiliary air chamber valve to stop inflating the main air chamber and each auxiliary air chamber of the inflatable product.

[0031] According to the wire-controlled air pump control method of the present invention: when it is necessary to deflate the main air chamber and all auxiliary air chambers of the inflatable product, the main air chamber valve and the auxiliary air chamber valve are opened through the control system, the fan is started, and the displacement position of the L-shaped switching pipe is controlled to connect the L-shaped switching pipe to the air extraction end of the fan, so as to drive the air in the main air chamber and each auxiliary air chamber of the inflatable product to enter the L-shaped switching pipe from the main chamber air supply port and each auxiliary chamber air supply port and enter the air pump interior, and be discharged outward through the external air port;

[0032] When the air pressure data monitored by the air pressure sensor drops to a preset fourth threshold value, the main air chamber valve and the auxiliary air chamber valve are closed through the control system and the fan is shut down.

[0033] The method for controlling a pneumatic pump by wire according to the present invention: after inflation is completed and it is necessary to continue to adjust and increase the air pressure in the main air chamber or the auxiliary air chamber of the inflated product, the control system starts the fan and controls the displacement position of the L-shaped switching pipe to connect the L-shaped switching pipe to the exhaust end of the fan, and opens the main air chamber valve or the auxiliary air chamber valve, driving air to enter the main chamber air supply port or the auxiliary chamber air supply port through the L-shaped switching pipe to inflate the main air chamber or the auxiliary air chamber of the inflated product; after inflation is completed, the control system shuts down the fan and closes the main air chamber valve or the auxiliary air chamber valve;

[0034] After inflation is completed and it is necessary to adjust and decrease the air pressure in the main air chamber or the auxiliary air chamber of the inflated product, the control system opens the main air chamber valve or the auxiliary air chamber valve, allowing the air in the main air chamber or the auxiliary air chamber of the inflated product to enter the interior of the air pump through the L-shaped switching pipe and naturally discharge outward through the external air port.

[0035] A wire-controlled air pump for a multi-air chamber inflated product according to the present invention is provided with a movable L-shaped switching pipe inside the installation shell of the air pump. The L-shaped switching pipe can be controlled to move by the control system. Since one end of the L-shaped switching pipe is connected to the main chamber air supply port and each auxiliary chamber air supply port, the main air chamber and each auxiliary air chamber of the inflated product can be commonly connected to the L-shaped switching pipe through the main chamber air supply port and each auxiliary chamber air supply port of the air pump installation shell. At the same time, since the other end of the L-shaped switching pipe is respectively connected to the suction end and the exhaust end of the fan through different displacement positions of the L-shaped switching pipe, it is equivalent to that when the L-shaped switching pipe moves to different positions, it can be respectively connected to the suction end and the exhaust end of the fan. Therefore, as long as the control system controls the L-shaped switching pipe to switch to different working positions, the suction end and the exhaust end of the fan can respectively act on the interior of the L-shaped switching pipe. When the L-shaped switching pipe is controlled to move to a position connected to the exhaust end of the fan, the fan can input air into the interior of the L-shaped switching pipe, allowing the air to enter the main chamber air supply port and each auxiliary chamber air supply port through the L-shaped switching pipe, realizing simultaneous inflation of each air chamber of the inflated product. On the contrary, when the L-shaped switching pipe is controlled to move to a position connected to the suction end of the fan, the fan can suck air from the interior of the L-shaped switching pipe, and then extract the air inside each air chamber of the inflated product through the main chamber air supply port and each auxiliary chamber air supply port. That is to say, the present invention can respectively realize the inflation and deflation of the main air chamber and all auxiliary air chambers of the inflated product by switching the working position of the L-shaped switching pipe inside the air pump, and a simple structure can realize the inflation and deflation of multiple air chambers of the inflated product.

[0036] In addition, based on the air pump structure of the present invention, an air pump control method provided by the present invention opens the main air chamber valve and the auxiliary air chamber valve and starts the fan through the control system when it is necessary to inflate the main air chamber and all the auxiliary air chambers of the inflatable product, and controls the displacement position of the L-shaped switching tube so that the L-shaped switching tube is connected to the exhaust end of the fan, so as to drive the external air to enter the inside of the air pump from the external air port and enter the main chamber air supply port and each auxiliary chamber air supply port through the L-shaped switching tube respectively, and inflate the main air chamber and each auxiliary air chamber of the inflatable product through the main chamber air supply port and each auxiliary chamber air supply port respectively. In order to consider the factor that the volume difference between the main air chamber and the auxiliary air chamber of the inflatable product is large, the control system of the air pump pre-sets a first threshold value, a second threshold value and a third threshold value. During the inflation process, when the air pressure data monitored by the air pressure sensor rises to the preset first threshold value, the control system closes the valves of each auxiliary air chamber and keeps the main air chamber valve open, so as to stop the inflation of each auxiliary air chamber of the inflatable product and keep the inflation of the main air chamber of the inflatable product, which is equivalent to inflating each air chamber to a certain value. After ensuring to a certain extent that all the air chambers of the inflatable product are expanded by the input air, the inflation of the smaller auxiliary air chambers is temporarily stopped to prevent the auxiliary air chambers of the inflatable product from over-expanding. At the same time, the main air chamber of the inflatable product continues to be inflated, allowing the larger main air chamber to continue to expand. When the air pressure data monitored by the air pressure sensor rises to the preset second threshold value, it reflects that the main air chamber of the inflatable product has reached a sufficient expansion state. At this time, the control system closes the main air chamber valve and opens the auxiliary air chamber valves to stop inflating the main air chamber of the inflatable product. At this time, the air pump continues to inflate the auxiliary air chambers of the inflatable product that have not been fully expanded, so as to prevent the auxiliary air chambers of the inflatable product from over-expanding. Finally, when the air pressure data monitored by the air pressure sensor rises to the preset third threshold value, the control system shuts down the fan and closes the auxiliary air chamber valves to stop inflating the main air chamber and the auxiliary air chambers of the inflatable product, allowing the air chambers of the inflatable product to remain in an expanded state, and then it can be put into normal use. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required to be used in the embodiments or the description of the prior art are briefly introduced below.

[0038] Figure 1 It is the external structure diagram of the present invention;

[0039] Figure 2 It is a bottom structure diagram of the present invention;

[0040] Figure 3 It is a bottom structure diagram of the present invention;

[0041] Figure 4 is an internal structure diagram of the present invention (hiding the top cover of the mounting shell);

[0042] Figure 5 It is the internal structure diagram of the present invention (the installation shell is hidden);

[0043] Figure 6 It is a structural diagram of a Z-shaped partition in the present invention;

[0044] Figure 7 It is a schematic diagram of the structure of the Z-shaped partition in the present invention that divides the inside of the air pump installation shell into a blowing cavity, an air extraction cavity, an air collection cavity and an air exchange cavity;

[0045] Figure 8 It is a structural diagram of a fan in the present invention;

[0046] Figure 9 It is a structural diagram of a Z-shaped partition in the present invention;

[0047] Figure 10 It is the internal structure diagram of the present invention;

[0048] Figure 11 This is a state diagram of the L-shaped switching tube when it is connected to the inflation hole in the present invention;

[0049] Figure 12 This is a state diagram of the L-shaped switching tube when it is connected to the exhaust hole in the present invention.

[0050] Reference numerals:

[0051] 1. Mounting shell, 2. Fan, 3. Control system, 4. External air port, 5. Main chamber air supply port, 6. Sub-chamber air supply port, 7. Main air chamber valve, 8. Sub-chamber valve, 9. L-shaped switching tube, 10. Z-shaped partition, 11. Upper side horizontal plate, 12. Blowing cavity, 13. Suction cavity, 14. Centrifugal impeller, 15. Middle vertical plate, 16. Supplementary pipe, 17. Inflation hole, 18. Exhaust hole, 19. Lower side horizontal plate, 2 0. Air collecting chamber, 21. Vertical pipe, 22. First annular plate, 23. Conducting hole, 24. Motor, 25. Motor mounting plate, 26. Connecting plate, 27. Screw hole, 28. Rotating shaft hole, 29. Second annular plate, 30. Gap, 31. Main air nozzle, 32. Auxiliary air nozzle, 33. Opening, 34. Connecting pipe, 35. Air exchange chamber, 36. Electromagnetic switch, 37. Hook, 38. Fixing plate, 39. Spring. DETAILED DESCRIPTION

[0052] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings.

[0053] like Figures 1 to 10As shown in the figure, a wire-controlled air pump for multi-chamber inflatable products. The structure of the air pump includes an installation shell 1, which is used to be fixedly embedded in the inner cavity of the inflatable product. An external air port 4 is opened on the installation shell 1, and the external air port 4 is exposed on one side of the inflatable product, so that external air can enter the installation shell 1 of the air pump, or so that the air inside the inflatable product can be output to the outside through the external air port 4 of the air pump. Regarding the structure inside the installation shell 1 of the air pump, a fan 2 and a control system 3 are installed inside the installation shell 1, and a main chamber air supply port 5 and two sub-chamber air supply ports 6 are opened at the bottom of the installation shell 1. The main chamber air supply port 5 and the two sub-chamber air supply ports 6 are both located in the inner cavity of the inflatable product. In addition, a main air nozzle 31 and two sub-air nozzles 32 are installed at the bottom of the installation shell 1. The main air nozzle 31 is sleeved on the main chamber air supply port 5, and the two sub-air nozzles 32 are respectively sleeved on each sub-chamber air supply port 6. An opening 33 is provided on one side of the main air nozzle 31. The main air nozzle 31 is located in the main air chamber of the inflatable product, and the inner cavity of the main air chamber can exchange air with the inside of the installation shell 1 of the air pump through the opening 33 of the main air nozzle 31. And at the bottom of the two sub-air nozzles 32, there are connecting pipes 34, and the connecting pipes 34 are used to sleeve hoses (not shown in the figure). The other end of the hose is connected to the sub-air chamber of the inflatable product, and the inner cavities of each sub-air chamber can exchange air with the inside of the installation shell 1 of the air pump through the hose and the connecting pipes 34. In order to control the opening and closing of each air supply port of the air pump, a main chamber valve 7 and a sub-chamber valve 8 are respectively installed on the main chamber air supply port 5 and the sub-chamber air supply port 6. In addition, an L-shaped switching pipe 9 is movably installed inside the installation shell 1. The movement of the L-shaped switching pipe 9 is controlled by the control system 3. One end at the bottom of the L-shaped switching pipe 9 is connected to the main chamber air supply port 5 and each sub-chamber air supply port 6 together, and one end at the left side of the top of the L-shaped switching pipe 9 is respectively connected to the air suction end and the air exhaust end of the fan 2 through different displacement positions of the L-shaped switching pipe 9. And a pressure sensor (not shown in the figure) is arranged inside the installation shell 1, and the control system 3 detects the air pressure data of the inflatable product through the pressure sensor. During the working process, when the L-shaped switching pipe 9 is connected to the air exhaust end of the fan 2, the fan 2 sucks external air into the installation shell 1 of the air pump from the external air port 4. The external air respectively enters the main chamber air supply port 5 and each sub-chamber air supply port 6 after passing through the external air port 4 and the L-shaped switching pipe 9, and then the main air chamber and each sub-air chamber of the inflatable product can be inflated. On the contrary, when the L-shaped switching pipe 9 is connected to the air suction end of the fan 2, the fan 2 sucks the internal air of the inflatable product through the L-shaped switching pipe 9. The air in the main air chamber and each sub-air chamber of the inflatable product respectively enters the installation shell 1 of the air pump through the main chamber air supply port 5 and each sub-chamber air supply port 6, and continues to be discharged to the outside through the L-shaped switching pipe 9 and the external air port 4.

[0054] It can be understood that a movable L-shaped switching pipe 9 is provided inside the installation shell 1 of the wire-controlled air pump of the present invention. The L-shaped switching pipe 9 can be controlled by the control system 3 to move. Since one end of the L-shaped switching pipe 9 is connected to the main chamber air supply port 5 and each sub-chamber air supply port 6, the main air chamber and each sub-air chamber of the inflatable product can be jointly connected to the L-shaped switching pipe 9 through the main chamber air supply port 5 and each sub-chamber air supply port 6 of the air pump installation shell. At the same time, since the other end of the L-shaped switching pipe 9 is connected to the air extraction end and the exhaust end of the fan 2 through different displacement positions of the L-shaped switching pipe 9, it is equivalent to that when the L-shaped switching pipe 9 moves to different positions, it can be respectively connected to the air extraction end and the exhaust end of the fan 2. Therefore, as long as the control system 3 is used to control the L-shaped switching pipe 9 to switch to different working positions, the air extraction end and the exhaust end of the fan 2 can respectively act on the inside of the L-shaped switching pipe 9. When the L-shaped switching pipe 9 is controlled to move to the position connected to the exhaust end of the fan 2, the fan 2 can input air into the inside of the L-shaped switching pipe 9, and the air can enter the main chamber air supply port 5 and each sub-chamber air supply port 6 through the L-shaped switching pipe 9, so as to realize the simultaneous inflation of each air chamber of the inflatable product. On the contrary, when the L-shaped switching pipe 9 is controlled to move to the position connected to the air extraction end of the fan 2, the fan 2 can suck air from the inside of the L-shaped switching pipe 9, and then extract the air inside each air chamber of the inflatable product through the main chamber air supply port 5 and each sub-chamber air supply port 6. That is to say, by switching the working position of the L-shaped switching pipe 9 inside the air pump of the present invention, the inflation and deflation of the main air chamber and all sub-air chambers of the inflatable product can be respectively realized, and the inflation and deflation of multiple air chambers of the inflatable product can be realized with a simple structure.

[0055] In one embodiment, a Z-shaped partition 10 is fixedly installed inside the installation shell 1. The Z-shaped partition 10 is mainly used to divide a plurality of different cavities in the internal space of the installation shell 1. Regarding the specific structure of the Z-shaped partition 10, the Z-shaped partition 10 includes an upper horizontal plate 11 at the top and a lower horizontal plate 19 at the bottom. A vertically extending middle vertical plate 15 is connected between the upper horizontal plate 11 and the lower horizontal plate 19. Among them, inside the installation shell 1, the upper and lower sides of the upper horizontal plate 11 respectively divide a blowing cavity 12 and a pumping cavity 13 inside the installation shell 1. The right side of the middle vertical plate 15 divides a ventilation cavity 35 inside the installation shell 1. The ventilation cavity 35 is located above the lower horizontal plate 19, and the blowing cavity 12 and the ventilation cavity 35, as well as the pumping cavity 13 and the ventilation cavity 35, are separated by the middle vertical plate 15 respectively. In addition, an external air port 4 communicates with the ventilation cavity 35. An inflation hole 17 and an exhaust hole 18 are opened on the middle vertical plate 15. The inflation hole 17 communicates with the blowing cavity 12, and the exhaust hole 18 communicates with the pumping cavity 13. The left end of the top of the L-shaped switching pipe 9 communicates with the exhaust hole 18 and the inflation hole 17 respectively through different displacement positions. The fan 2 includes a centrifugal impeller 14. The centrifugal impeller 14 is installed in the blowing cavity 12, and the air extraction end in the middle of the centrifugal impeller 14 communicates with the pumping cavity 13. Therefore, when the centrifugal impeller 14 rotates, the air extraction end in the middle of it can suck the air in the pumping cavity 13, so that the air in the pumping cavity 13 enters the blowing cavity 12. Therefore, when it is necessary to inflate an inflatable product, the control system 3 controls the L-shaped switching pipe 9 to move to the position where it is connected to the inflation hole 17, and at the same time starts the fan 2 to drive the centrifugal impeller 14 located in the blowing cavity 12 to rotate. The air extraction end in the middle of the centrifugal impeller 14 will continuously suck the air in the pumping cavity 13. After a negative pressure is formed inside the pumping cavity 13, the external air will naturally enter the ventilation cavity 35 inside the air pump through the external air port 4 of the air pump, and enter the pumping cavity 13 through the exhaust hole 18 on the middle vertical plate 15, so that the external air continuously enters the pumping cavity 13. The centrifugal impeller 14 can drive the air entering the blowing cavity 12 to enter the L-shaped switching pipe 9 through the inflation hole 17, and be transported to the main chamber air supply port 5 and each sub-chamber air supply port 6 at the bottom of the air pump through the L-shaped switching pipe 9, and successfully realize the inflation of the main air chamber and each sub-air chamber of the inflatable product.On the contrary, when it is necessary to deflate the inflatable product, the control system 3 controls the L-shaped switching pipe 9 to move to a position where the exhaust hole 18 is connected. At the same time, the blower 2 is started to drive the centrifugal impeller 14 located in the air blowing cavity 12 to rotate. At this time, since the air extraction cavity 13 and the L-shaped switching pipe 9 are interconnected through the exhaust hole 18, when the air extraction end in the middle of the centrifugal impeller 14 continuously sucks the air in the air extraction cavity 13, a negative pressure can be formed in the air extraction cavity 13 and the interior of the L-shaped switching pipe 9 together. The air in each air chamber of the inflatable product will naturally enter the air pump through the main chamber air supply port 5 and each sub-chamber air supply port 6 at the bottom of the air pump, enter the air blowing cavity 12 through the L-shaped switching pipe 9 and the air extraction cavity 13, then enter the air exchange cavity 35 through the air inflation hole 17 on one side of the air blowing cavity 12, and finally be discharged to the outside through the external air port 4 on the air pump, successfully realizing the deflation of the main air chamber and each sub-air chamber of the inflatable product.

[0056] In one embodiment, a gas collecting cavity 20 is defined on the lower side of the lower horizontal plate 19 within the mounting shell 1, and the main chamber air supply port 5 and each sub-chamber air supply port 6 at the bottom of the air pump are communicated with the gas collecting cavity 20 together. In addition, a vertical pipe 21 is integrally formed on the lower horizontal plate 19, and the lower end of the vertical pipe 21 is communicated with the gas collecting cavity 20. Combining Figure 11 and Figure 12 as shown, during assembly, the lower end of the L-shaped switching pipe 9 is slidably sleeved within the vertical pipe 21 and communicated with the gas collecting cavity 20, enabling the L-shaped switching pipe 9 to linearly reciprocate along the vertical pipe 21. Since the air inflation hole 17 and the exhaust hole 18 are linearly arranged along the extending direction of the vertical pipe 21, the left end of the top of the L-shaped switching pipe 9 can be respectively butted against the air inflation hole 17 and the exhaust hole 18 by linearly reciprocating the L-shaped switching pipe 9 along the vertical pipe 21 to different positions. In the above structure, since the lower end of the L-shaped switching pipe 9 is slidably sleeved within the vertical pipe 21 and communicated with the gas collecting cavity 20, on the one hand, the stability of the L-shaped switching pipe 9 during movement can be ensured, and on the other hand, it can be ensured that the L-shaped switching pipe 9 is always communicated with the gas collecting cavity 20 during movement, ensuring that each air chamber of the inflatable product can be communicated with the L-shaped switching pipe 9 through the gas collecting cavity 20 during inflation or deflation.

[0057] Optionally, in order to facilitate the air pump to accurately detect the air pressure of the inflatable product during the inflation or deflation process, the air pressure sensor can be selected to be installed inside the L-shaped switching pipe 9 or the gas collecting cavity 20.

[0058] Specifically, in order to ensure that the top of the upper horizontal plate 11 of the Z-shaped partition plate 10 can divide the blowing cavity 12 inside the installation shell 1, a first annular plate 22 is integrally formed on the top of the upper horizontal plate 11. The first annular plate 22 vertically extends to the inner wall of the top of the installation shell 1 and encloses the blowing cavity 12 with the inner wall of the installation shell 1, thereby realizing the formation of the blowing cavity 12 inside the installation shell 1. In addition, the edges of the upper horizontal plate 11 and the middle vertical plate 15 respectively extend to the inner wall of the installation shell 1, so as to enclose the air extraction cavity 13 with the inner wall of the installation shell 1.

[0059] In addition, the upper horizontal plate 11 is provided with a guiding through hole 23 that communicates the blowing cavity 12 and the air extraction cavity 13, so that the air extraction end in the middle of the centrifugal impeller 14 can communicate with the air extraction cavity 13. The blower 2 further includes a motor 24. The motor 24 and the centrifugal impeller 14 are respectively located in the air extraction cavity 13 and the blowing cavity 12 and are coaxially connected to each other through the guiding through hole 23.

[0060] Specifically, in order to facilitate the installation and fixation of the motor 24, a motor mounting plate 25 is provided in the air extraction cavity 13. The motor mounting plate 25 is provided with a plurality of screw holes 27 for connecting the motor 24, and a rotating shaft hole 28 that allows the output shaft of the motor 24 to pass through is provided on the motor mounting plate 25. The position of the motor mounting plate 25 corresponds to the guiding through hole 23, and there is a certain space between the motor mounting plate 25 and the bottom of the upper horizontal plate 11. In order to ensure the fixation of the motor mounting plate 25, a plurality of connecting plates 26 are fixedly connected between the upper horizontal plate 11 and the motor mounting plate 25. Each connecting plate 26 surrounds the central axis of the guiding through hole 23 and is spaced apart from each other by a certain gap 30. Therefore, air can be exchanged between the air extraction cavity 13 and the blowing cavity 12 through each gap 30.

[0061] Specifically, a second annular plate 29 is integrally formed on the bottom of the lower horizontal plate 19. The second annular plate 29 vertically extends downward to the inner wall of the installation shell 1, so as to enclose the air collecting cavity 20 with the inner wall of the installation shell 1.

[0062] Further, a supplementary pipe 16 is integrally formed on the upper side of the lower horizontal plate 19. The ventilation cavity 35 and the air extraction cavity 13 are connected through the supplementary pipe 16. Specifically, the lower port of the supplementary pipe 16 is connected to the air extraction cavity 13, and the upper port of the supplementary pipe 16 is located inside the ventilation cavity 35 and connected to the ventilation cavity 35. When the L-shaped switching pipe 9 is docked to the inflation hole 17, the upper port of the supplementary pipe 16 is in an open state. Therefore, when the air pump inflates the inflatable product, in addition to the external air entering the ventilation cavity 35 through the external air port 4 and entering the interior of the air extraction cavity 13 through the exhaust holes 18 on the middle vertical plate 15, it can also enter the air extraction cavity 13 through the supplementary pipe 16 at the same time, ensuring that the external air can enter the air extraction cavity 13 more fully and helping to improve the inflation efficiency of the air pump for the inflatable product. On the contrary, when the L-shaped switching pipe 9 is docked to the exhaust hole 18, that is, when the air pump deflates the inflatable product, the bottom plane of the L-shaped switching pipe 9 covers and closes the upper port of the supplementary pipe 16, which can prevent the air entering the air extraction cavity 13 from the L-shaped switching pipe 9 from directly escaping from the ventilation cavity 35 through the supplementary pipe 16, but ensures that the air discharged from the air extraction cavity 13 can be efficiently discharged to the outside under the active drive of the centrifugal impeller 14, ensuring the deflation efficiency of the air pump for the inflatable product.

[0063] Further, an electromagnetic switch 36 is also installed inside the installation shell 1 of the air pump. The electromagnetic switch 36 is controlled by the control system 3 of the air pump. The bottom of the electromagnetic switch 36 is fixed on the lower horizontal plate 19 of the Z-shaped partition plate 10, and a hook 37 is integrally formed at the top of the L-shaped switching pipe 9. The hook 37 is buckled to the telescopic end at the top of the electromagnetic switch 36, so that the electromagnetic switch 36 can drive the L-shaped switching pipe 9 to move. In addition, a fixing plate 38 is also provided on the lower horizontal plate 19. The telescopic end of the electromagnetic switch 36 passes upward through the through hole of the fixing plate 38 and is buckled to the hook 37, and a spring 39 is provided between the top of the fixing plate 38 and the bottom of the hook 37. The spring 39 is sleeved on the telescopic end of the electromagnetic switch 36. When the electromagnetic switch 36 is energized, its telescopic end pulls the hook 37 and drives the entire L-shaped switching pipe 9 to move downward. At this time, the spring 39 is compressed, and the L-shaped switching pipe 9 remains in the state of being docked to the exhaust hole 18, so as to facilitate the air pump to deflate the inflatable product. When the electromagnetic switch 36 loses power, under the pushing force of the restoring force of the spring 39, the hook 37 can drive the L-shaped switching pipe 9 to reset and move upward, and reconnect to the inflation hole 17, so as to facilitate the air pump to inflate the inflatable product. Therefore, the different working positions of the L-shaped switching pipe 9 inside the installation shell 1 can be simply switched.

[0064] The following is the control method of the air pump in this embodiment:

[0065] When it is necessary to use the air pump in this embodiment to inflate the main air chamber and all sub-air chambers of the inflatable product, the following steps are executed:

[0066] S1. Open the main air chamber valve 7 and the auxiliary air chamber valve 8 through the control system 3 and start the fan 2. At the same time, control the movement of the L-shaped switching pipe 9 so that the L-shaped switching pipe 9 is connected to the exhaust end of the fan 2, that is, the L-shaped switching pipe 9 is butted against the inflation hole 17, so as to drive the external air to enter the air exchange chamber 35, the air extraction chamber 13 and the air blowing chamber 12 inside the air pump in sequence from the external air port 4 and then enter the main chamber air supply port 5 and each auxiliary chamber air supply port 6 through the L-shaped switching pipe 9 respectively.

[0067] S2. During the inflation process, when the air pressure data monitored by the air pressure sensor rises to the preset first threshold value, the control system 3 closes each auxiliary air chamber valve 8 to abort the inflation of each auxiliary air chamber of the inflated product. At the same time, the control system 3 keeps the main air chamber valve 7 open to keep inflating the main air chamber of the inflated product.

[0068] S3. After the air pressure data monitored by the air pressure sensor rises to the preset second threshold value, the control system 3 closes the main air chamber valve 7 to stop inflating the main air chamber of the inflated product. At the same time, the control system 3 reopens each auxiliary air chamber valve 8 to continue inflating each auxiliary air chamber of the inflated product.

[0069] S4. When the air pressure data monitored by the air pressure sensor rises to the preset third threshold value, the control system 3 shuts down the fan 2 and closes each auxiliary air chamber valve 8 to stop inflating the main air chamber and each auxiliary air chamber of the inflated product.

[0070] It can be understood that in the above control method, when it is necessary to inflate the main air chamber and all the auxiliary air chambers of the inflatable product, the main air chamber valve 7 and the auxiliary air chamber valve 8 are opened by the control system 3, the fan 2 is started, and the displacement position of the L-shaped switching tube 9 is controlled so that the L-shaped switching tube 9 is connected to the exhaust end of the fan 2, so as to drive the external air to enter the inside of the air pump from the external air port 4 and enter the main chamber air supply port 5 and each auxiliary chamber air supply port 6 respectively through the L-shaped switching tube 9, and the main air chamber of the inflatable product is inflated through the main chamber air supply port 5 and each auxiliary chamber air supply port 6. In order to consider the large volume difference between the main air chamber and the auxiliary air chamber of the inflatable product, the air pump control system pre-sets a first threshold, a second threshold and a third threshold. During the inflation process, when the air pressure data monitored by the air pressure sensor rises to the preset first threshold, the control system 3 closes the valves 8 of the auxiliary air chambers and keeps the main air chamber valve 7 open, so as to stop the inflation of the auxiliary air chambers of the inflatable product and keep the inflation of the main air chamber of the inflatable product, which is equivalent to inflating each air chamber to a certain After ensuring that all air chambers of the inflatable product are expanded by the input air to a certain extent, the inflation of the smaller auxiliary air chambers is temporarily stopped to prevent the auxiliary air chambers of the inflatable product from over-expanding. At the same time, the main air chamber of the inflatable product continues to be inflated, allowing the larger main air chamber to continue to expand. When the air pressure data monitored by the air pressure sensor rises to the preset second threshold value, it reflects that the main air chamber of the inflatable product has reached a sufficient expansion state. At this time, the control system 3 closes the main air chamber valve 7 and opens the auxiliary air chamber valves 8 to stop inflating the main air chamber of the inflatable product. At this time, the air pump continues to inflate the auxiliary air chambers of the inflatable product that have not been fully expanded. In this way, the auxiliary air chambers of the inflatable product can be prevented from over-expanding. Finally, when the air pressure data monitored by the air pressure sensor rises to the preset third threshold value, the control system 3 shuts down the fan 2 and closes the auxiliary air chamber valves 8 to stop inflating the main air chamber and the auxiliary air chambers of the inflatable product, allowing the air chambers of the inflatable product to remain in an expanded state, and then it can be put into normal use.

[0071] Furthermore, when it is necessary to use the air pump of this embodiment to deflate the main air chamber and all the auxiliary air chambers of the inflatable product, the following steps are performed:

[0072] S1, open the main air chamber valve 7 and the auxiliary air chamber valve 8 through the control system 3 and start the fan 2, and at the same time switch the displacement position of the L-shaped switching tube 9, so that the L-shaped switching tube 9 is connected to the air extraction end of the fan 2, that is, the L-shaped switching tube 9 is connected to the exhaust hole 18, so as to drive the air in the main air chamber and each auxiliary air chamber of the inflatable product from the main chamber air supply port 5 and each auxiliary chamber air supply port 6 into the L-shaped switching tube 9 and enter the air extraction chamber 13, the blowing chamber 12 and the ventilation chamber 35 inside the air pump in turn, and finally be discharged outward through the external air port 4 of the air pump;

[0073] S2. When the air pressure data monitored by the air pressure sensor drops to the preset fourth threshold value, the main air chamber valve 7 and the auxiliary air chamber valve 8 are closed through the control system 3, and the fan 2 is shut down.

[0074] Therefore, all the air chambers of the inflatable product can be deflated by the above method.

[0075] Further, when it is necessary to further adjust and increase the air pressure in the main air chamber or the auxiliary air chamber of the inflatable product after inflation, the following steps are executed:

[0076] The fan 2 is started through the control system 3, and the displacement position of the L-shaped switching pipe 9 is switched, so that the L-shaped switching pipe 9 communicates with the exhaust end of the fan 2, that is, the L-shaped switching pipe 9 is butted against the inflation hole 17, and the main air chamber valve 7 or the auxiliary air chamber valve 8 is opened, and the external air is driven by the fan 2 to enter the main chamber air supply port 5 or the auxiliary chamber air supply port 6 through the L-shaped switching pipe 9 to inflate the main air chamber or the auxiliary air chamber of the inflatable product; after inflation is completed, the fan 2 is shut down through the control system 3, and the main air chamber valve 7 or the auxiliary air chamber valve 8 is closed;

[0077] When it is necessary to adjust and reduce the air pressure in the main air chamber or the auxiliary air chamber of the inflatable product after inflation, the following steps are executed;

[0078] The main air chamber valve 7 or the auxiliary air chamber valve 8 is opened through the control system 3, so that the air in the main air chamber or the auxiliary air chamber of the inflatable product enters the air pump through the L-shaped switching pipe 9 and is naturally discharged outward through the external air port 4. At this time, since the fan 2 does not need to be started, it is more energy-saving and environmentally friendly.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Simple modifications or equivalent replacements of each technical feature of this embodiment all fall within the protection scope of the present invention.

Claims

1. A wire-controlled air pump for multi-air chamber inflatable products, comprising a mounting shell for embedding into the inner cavity of the inflatable product. A fan and a control system are arranged inside the mounting shell. An external air port is opened on one side of the mounting shell exposed outside the inflatable product; on the side of the mounting shell located inside the inflatable product, a main chamber air supply port and a plurality of sub-chamber air supply ports are opened. A main air chamber valve and a sub-air chamber valve are respectively arranged at the main chamber air supply port and the sub-chamber air supply ports. It is characterized in that: An L-shaped switching pipe controlled to move by the control system is movably arranged inside the mounting shell. One end of the L-shaped switching pipe is connected to the main chamber air supply port and each sub-chamber air supply port together. The other end of the L-shaped switching pipe is respectively connected to the air suction end and the air exhaust end of the fan through different displacement positions. Among them, when the L-shaped switching pipe is connected to the air exhaust end of the fan, external air sequentially passes through the external air port and the L-shaped switching pipe and enters the main chamber air supply port and each sub-chamber air supply port respectively, so as to inflate the main air chamber and each sub-air chamber of the inflatable product. When the L-shaped switching pipe is connected to the air suction end of the fan, the air in the main air chamber and each sub-air chamber of the inflatable product respectively enters the L-shaped switching pipe through the main chamber air supply port and each sub-chamber air supply port and is discharged through the external air port. A Z-shaped partition plate is arranged inside the mounting shell. The Z-shaped partition plate includes an upper horizontal plate, a lower horizontal plate, and an intermediate vertical plate connecting between the upper horizontal plate and the lower horizontal plate. On the opposite sides of the upper horizontal plate, a blowing cavity and a suction cavity are divided inside the mounting shell. On one side of the intermediate vertical plate, a ventilation cavity is divided inside the mounting shell. And between the blowing cavity and the ventilation cavity, and between the suction cavity and the ventilation cavity are respectively separated by the intermediate vertical plate. The external air port is connected to the ventilation cavity. An inflation hole communicating with the blowing cavity and an exhaust hole communicating with the suction cavity are opened on the intermediate vertical plate. One end of the L-shaped switching pipe is respectively connected to the exhaust hole and the inflation hole through different displacement positions. The fan includes a centrifugal impeller. The centrifugal impeller is arranged in the blowing cavity and the air suction end in the middle of the centrifugal impeller is connected to the suction cavity. On the side of the lower horizontal plate opposite to the ventilation cavity, a gas collecting cavity connected to the main chamber air supply port and each sub-chamber air supply port together is divided inside the mounting shell. A riser pipe communicating with the gas collecting cavity is arranged on the lower horizontal plate; the inflation hole and the exhaust hole are linearly arranged along the extending direction of the riser pipe. One end of the L-shaped switching pipe is slidably sleeved inside the riser pipe and connected to the gas collecting cavity, so that the L-shaped switching pipe can linearly reciprocate along the riser pipe. By linearly reciprocating the L-shaped switching pipe along the riser pipe to different positions, the other end of the L-shaped switching pipe is respectively butted against the inflation hole and the exhaust hole. An additional pipe is integrally formed on the lower horizontal plate. The ventilation cavity and the suction cavity are connected through the additional pipe. The additional pipe is set to increase the channel for external gas to enter the suction cavity in the inflation state to improve the inflation efficiency, and isolate the ventilation cavity and the suction cavity in the exhaust state to improve the deflation efficiency. In the state where the L-shaped switching pipe is butted against the inflation hole, the port of the additional pipe located in the ventilation cavity is in an open state, so that external air can enter the suction cavity additionally through the additional pipe to improve the inflation speed; in the state where the L-shaped switching pipe is butted against the exhaust hole, the bottom plane of the L-shaped switching pipe covers and closes the port of the additional pipe located in the ventilation cavity, preventing the discharged gas from flowing back and ensuring the unidirectionality of the air flow direction.

2. The wired control air pump for multi-chamber inflatable products according to claim 1, wherein: A first annular plate is integrally formed on the top of the upper horizontal plate. The first annular plate extends vertically to the inner wall of the installation shell and encloses a blowing cavity with the inner wall of the installation shell; the upper horizontal plate and the middle vertical plate respectively extend to the inner wall of the installation shell and enclose a pumping cavity with the inner wall of the installation shell; the upper horizontal plate is provided with a guiding through-hole communicating the blowing cavity and the pumping cavity; The air blower further includes a motor. The motor and the centrifugal impeller are respectively located in the pumping cavity and the blowing cavity and are coaxially connected to each other through the guiding through-hole.

3. The wired control air pump for multi-chamber inflatable products according to claim 2, wherein: A motor mounting plate is arranged in the pumping cavity. The motor mounting plate corresponds to the guiding through-hole and is spaced from the bottom of the upper horizontal plate by a certain space; A plurality of connecting plates are fixedly connected between the upper horizontal plate and the motor mounting plate. Each connecting plate surrounds the central axis of the guiding through-hole and is spaced from each other by a certain gap; The motor mounting plate is provided with a plurality of screw holes and a rotating shaft hole allowing the output shaft of the motor to pass through.

4. The wired control air pump for multi-chamber inflatable products according to claim 1, wherein: A second annular plate is integrally formed on the bottom of the lower horizontal plate. The second annular plate extends vertically to the inner wall of the installation shell and encloses a gas collecting cavity with the inner wall of the installation shell.

5. A control method for the wired control air pump according to any one of claims 1 to 4, wherein: When it is necessary to inflate the main air chamber and all auxiliary air chambers of the inflatable product, the main air chamber valve and the auxiliary air chamber valve are opened through the control system, the air blower is started, and the displacement position of the L-shaped switching pipe is controlled to make the L-shaped switching pipe communicate with the exhaust end of the air blower, so as to drive external air to enter the air pump from the external air port and enter the main chamber air supply port and each auxiliary chamber air supply port through the L-shaped switching pipe respectively, and the main air chamber and each auxiliary air chamber of the inflatable product are inflated through the main chamber air supply port and each auxiliary chamber air supply port respectively; During the inflation process, when the air pressure data monitored by the air pressure sensor rises to a preset first threshold value, the control system closes each auxiliary air chamber valve to abort the inflation of each auxiliary air chamber of the inflatable product, and at the same time, the control system keeps the main air chamber valve open to keep inflating the main air chamber of the inflatable product; When the air pressure data monitored by the air pressure sensor rises to a preset second threshold value, the control system closes the main air chamber valve to stop inflating the main air chamber of the inflatable product, and at the same time, the control system reopens each auxiliary air chamber valve to continue inflating each auxiliary air chamber of the inflatable product; When the air pressure data monitored by the air pressure sensor rises to a preset third threshold value, the control system shuts down the air blower and closes each auxiliary air chamber valve to stop inflating the main air chamber and each auxiliary air chamber of the inflatable product.

6. The control method for the wired control air pump according to claim 5, wherein: When it is necessary to deflate the main air chamber and all auxiliary air chambers of the inflatable product, the main air chamber valve and the auxiliary air chamber valve are opened through the control system, the fan is started, and the displacement position of the L-shaped switching pipe is controlled so that the L-shaped switching pipe communicates with the air suction end of the fan, so as to drive the air in the main air chamber and each auxiliary air chamber of the inflatable product to enter the L-shaped switching pipe from the main chamber air supply port and each auxiliary chamber air supply port and enter the inside of the air pump, and is discharged outward through the external air port; When the air pressure data monitored by the air pressure sensor drops to the preset fourth threshold value, the main air chamber valve and the auxiliary air chamber valve are closed through the control system, and the fan is shut down.

7. The control method of the wire-controlled air pump according to claim 5, characterized in that: After inflation is completed and it is necessary to continue to adjust and increase the air pressure in the main air chamber or the auxiliary air chamber of the inflatable product, the fan is started through the control system, the displacement position of the L-shaped switching pipe is controlled so that the L-shaped switching pipe communicates with the air exhaust end of the fan, and the main air chamber valve or the auxiliary air chamber valve is opened, and the air is driven to enter the main chamber air supply port or the auxiliary chamber air supply port through the L-shaped switching pipe, so as to inflate the main air chamber or the auxiliary air chamber of the inflatable product; after inflation is completed, the fan is shut down through the control system, and the main air chamber valve or the auxiliary air chamber valve is closed; When it is necessary to adjust and reduce the air pressure in the main air chamber or the auxiliary air chamber of the inflatable product after inflation is completed, the main air chamber valve or the auxiliary air chamber valve is opened through the control system, so that the air in the main air chamber or the auxiliary air chamber of the inflatable product enters the inside of the air pump through the L-shaped switching pipe and is naturally discharged outward through the external air port.

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