Air pump

Abstract

The utility model discloses an air pump, relates to air pump technical field, the air pump includes pump body and pressure regulating valve, pressure regulating valve is provided in the pressure regulating channel, its elastic piece can drive the piston to open or close the communicating hole, makes the air pump have first inflation state and second inflation state. According to the technical scheme, the pressure regulating valve is arranged in the pressure regulating channel, so that the air pump has two inflation states to ensure that the maximum output air pressure of the air pump does not exceed the maximum bearing pressure of an inflated object, and the problem that the inflated object is damaged due to the fact that the air pressure of the air flow output by the air pump is too large is solved; an annular protruding part is arranged on one side face, facing the communicating hole, of the piston of the pressure regulating valve or the end face, facing the end of the piston, of the communicating hole, and the projection of the protruding part is located on the periphery of the communicating hole, so that the sealing effect of the piston on the communicating hole is improved, and the inflating effect of the air pump in the first inflating state is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of air pumps, and particularly relates to an air pump. Background Art

[0002] As an important gas conveying device, an air pump is used to increase the pressure of gas to meet specific application requirements, and has a wide range of applications in many fields such as industrial production, automobile maintenance, and household products. However, traditional air pump designs usually only focus on providing a stable air flow supply, and lack the ability to control the output air flow pressure. When the air pressure of the output air flow of the air pump is too high, it is easy to damage the inflation object (the product to be inflated). Summary of the Utility Model

[0003] The main object of the utility model is to propose an air pump, aiming to solve the problem that the air pressure of the output air flow of the air pump is too high and causes damage to the inflation object.

[0004] To achieve the above object, the air pump proposed by the utility model includes:

[0005] A pump body having an exhaust cavity and a pressure regulating channel, as well as an inflation port and a communication hole communicating with the exhaust cavity, and the pressure regulating channel communicates with the exhaust cavity through the communication hole;

[0006] A pressure regulating valve is arranged in the pressure regulating channel. The pressure regulating valve includes an elastic member and a piston. One elastic end of the elastic member abuts against the inner wall of the pressure regulating channel, and the other end abuts against the piston, so that the piston can open or block the communication hole, and the air pump has a first inflation state and a second inflation state. In the first inflation state, the piston blocks the communication hole, so that the gas in the exhaust cavity is discharged from the inflation port. In the second inflation state, the piston opens the communication hole, so that part of the gas in the exhaust cavity is discharged from the pressure regulating channel;

[0007] Wherein, a ring-shaped convex portion is provided on one of the side surface of the piston facing the communication hole and the end surface of the communication hole facing one end of the piston, and the projection of the convex portion is located on the outer periphery of the communication hole.

[0008] In one embodiment, the convex portion is provided on the side surface of the piston facing the communication hole.

[0009] In one embodiment, the piston includes a piston head and a plug that are separately arranged. An installation groove is provided on the side surface of the piston head facing the communication hole, the plug is installed in the installation groove, and the convex portion is provided on the plug.

[0010] In one embodiment, the pressure regulating valve further includes a valve cover, which is connected to one end of the pressure regulating passage away from the communication hole and is provided with an air outlet communicating with the pressure regulating passage. One end of the elastic member abuts against the valve cover, and the other end abuts against the piston head.

[0011] In one embodiment, the valve cover is further provided with a guiding passage. One end of the guiding passage communicates with the pressure regulating passage, and the other end communicates with the air outlet. The piston further includes a piston rod. One end of the piston rod is connected to the piston head, and the other end passes through the guiding passage and can telescopically move along the extending direction of the guiding passage.

[0012] In one embodiment, the pressure regulating valve further includes a silencing member, which is arranged at the air outlet.

[0013] In one embodiment, a limiting member is further arranged on the outer surface of the valve cover. The limiting member includes a limiting baffle and a limiting buckle. The limiting baffle is arranged on the outer periphery of the silencing member, and the limiting buckle is arranged at one end of the limiting baffle away from the valve cover. The limiting member and the valve cover jointly form a receiving groove, and the silencing member is arranged in the receiving groove and can move in the height direction of the limiting baffle.

[0014] In one embodiment, the valve cover is threadedly connected to the inner wall surface of the pressure regulating passage.

[0015] In one embodiment, the material of the plug is an elastic material.

[0016] In one embodiment, the air pump further includes a motor assembly. The pump body further includes a compression chamber and a compression assembly arranged in the compression chamber. The compression chamber is arranged between the motor assembly and the exhaust chamber. The compression assembly includes a plurality of air bags. The motor assembly is used to drive the air bags to compress gas. The exhaust chamber includes a central chamber and a plurality of exhaust chambers communicating with the central chamber. The plurality of exhaust chambers communicate with the air bags one by one. The inflation port communicates with the central chamber, and the communication hole communicates with one of the exhaust chambers.

[0017] In one embodiment, the air pump further includes an inflation nozzle arranged at the inflation port. The inflation nozzle and the pressure regulating valve are arranged on the same side of the pump body away from the motor assembly.

[0018] By arranging a pressure regulating valve in the pressure regulating passage in the technical solution of the present utility model, the air pump has two inflation states. When the air pressure in the exhaust chamber is greater than the maximum bearing pressure of the inflation object, part of the gas in the exhaust chamber can be discharged from the pressure regulating passage to reduce the air pressure in the exhaust chamber, so as to ensure that the maximum output air pressure of the air pump does not exceed the maximum bearing pressure of the inflation object, thereby solving the problem that the inflation object is damaged due to excessive air pressure of the air flow output by the air pump.

[0019] In addition, an annular convex portion is provided on one of the side surface of the piston of the pressure regulating valve facing the communication hole and the end surface of the communication hole facing the piston, and the projection of the convex portion is located on the outer periphery of the communication hole, so as to improve the sealing effect of the piston on the communication hole, thereby ensuring the inflation effect of the air pump in the first inflation state. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0021] Figure 1 A sectional view of an embodiment of the air pump provided by the present invention along its axis;

[0022] Figure 2 For Figure 1 The enlarged partial view at A in

[0023] Figure 3 For Figure 2 The enlarged partial view at B in

[0024] Figure 4 For Figure 1 The exploded view of the pressure regulating valve in

[0025] Figure 5 A sectional view of an embodiment of the air pump provided by the present invention along the horizontal line.

[0026] Explanation of the reference numerals in the drawings:

[0027] 10. Air pump; 100. Pump body; 200. Pressure regulating valve; 300. Motor assembly; 400. Inflating nozzle; 110. Exhaust cavity; 111. Exhaust chamber; 112. Central chamber; 120. Pressure regulating channel; 130. Inflating port; 140. Communication hole; 150. Compression cavity; 160. Airbag; 210. Elastic member; 220. Piston head; 230. Plug; 231. Convex portion; 240. Piston rod; 250. Valve cover; 251. Air outlet; 252. Guide channel; 260. Sound-absorbing member; 270. Limiting member; 271. Limiting baffle; 272. Limiting buckle.

[0028] The realization of the purpose, functional characteristics and advantages of the present invention will be further described with reference to the embodiments and the drawings. Detailed Embodiments

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts belong to the scope of protection of the present invention.

[0030] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0031] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution that satisfies both A and B at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0032] The present invention provides an air pump 10.

[0033] Please refer to Figures 1 to 3, in an embodiment of the present utility model, the air pump 10 includes a pump body 100 and a pressure regulating valve 200. The pump body 100 has an exhaust cavity 110, a pressure regulating channel 120, an inflation port 130 communicating with the exhaust cavity 110, and a communication hole 140. The pressure regulating channel 120 communicates with the exhaust cavity 110 through the communication hole 140. The pressure regulating valve 200 is disposed in the pressure regulating channel 120. The pressure regulating valve 200 includes an elastic member 210 and a piston. One elastic end of the elastic member 210 abuts against the inner wall of the pressure regulating channel 120, and the other end abuts against the piston, so that the piston can open or block the communication hole 140, and the air pump 10 has a first inflation state and a second inflation state. In the first inflation state, the piston blocks the communication hole 140, so that the gas in the exhaust cavity 110 is discharged from the inflation port 130. In the second inflation state, the piston opens the communication hole 140, so that a part of the gas in the exhaust cavity 110 is discharged from the pressure regulating channel 120. Wherein, a ring-shaped convex portion 231 is provided on one of the side surface of the piston facing the communication hole 140 and the end surface of the communication hole 140 facing the piston.

[0034] The high-pressure gas generated by the compression of the pump body 100 is collected in the exhaust cavity 110 and supplies air to the inflation object through the inflation port 130. The pressure regulating valve 200 is used to adjust the air pressure in the exhaust cavity 110. When the air pressure in the exhaust cavity 110 is greater than the maximum bearing pressure of the inflation object, the pressure regulating valve 200 can release a part of the gas in the exhaust cavity 110 to the outside, so that the air pressure in the exhaust cavity 110 does not exceed the maximum bearing pressure of the inflation object, to avoid over-inflation of the inflation object, thereby solving the problem that the inflation object is damaged due to excessive air pressure of the air flow output by the air pump 10.

[0035] Specifically, the pressure regulating channel 120 communicates with the exhaust cavity 110 through the communication hole 140. The pressure regulating valve 200 is disposed in the pressure regulating channel 120, and the elastic member 210 of the pressure regulating valve 200 can push against the piston to open or close the communication hole 140. In the first inflation state, the air pressure in the exhaust cavity 110 is less than the pushing force exerted by the elastic member 210 on the piston. The elastic member 210 pushes against the piston to close the communication hole 140, so that the pressure regulating channel 120 is blocked from the exhaust cavity 110, and all the air flow in the exhaust cavity 110 is discharged from the inflation port 130 to supply air to the inflation object. In the second inflation state, the air pressure in the exhaust cavity 110 is greater than the pushing force of the elastic member 210. The pushing force of the elastic member 210 is not sufficient to push against the piston to close the communication hole 140. Thus, the communication hole 140 is opened, and the pressure regulating channel 120 communicates with the exhaust cavity 110 through the communication hole 140. Part of the air flow in the exhaust cavity 110 is discharged into the atmosphere from the communication hole 140 via the pressure regulating channel 120, thereby causing the air pressure in the exhaust cavity 110 to drop. When the air pressure in the exhaust cavity 110 drops to be less than the pushing force exerted by the elastic member 210 on the piston, the pressure regulating valve 200 re-enters the first inflation state. When the pump body 100 continues to work, the air pressure in the exhaust cavity 110 gradually increases again. Once the air pressure in the exhaust cavity 110 is greater than the pushing force exerted by the elastic member 210 on the piston, the pressure regulating valve 200 will enter the second inflation state again, and so on in a cycle.

[0036] The maximum output air pressure of the air pump 10 is not greater than the pushing force exerted by the elastic member 210 on the piston, and the pushing force exerted by the elastic member 210 on the piston is not greater than the maximum bearing pressure of the inflation object. It can be understood that when the maximum output air pressure of the air pump 10 is less than the pushing force exerted by the elastic member 210 on the piston, the piston always closes the communication hole 140, and the air pump 10 always maintains the first inflation state. At this time, the maximum output air pressure of the air pump 10 is also less than the maximum bearing pressure of the inflation object. When the maximum output air pressure of the air pump 10 is equal to the pushing force exerted by the elastic member 210 on the piston, the air pump 10 switches between the first inflation state and the second inflation state. In this way, it can be ensured that the maximum output air pressure of the air pump 10 is not greater than the maximum bearing pressure of the inflation object, so that it can effectively prevent the air pressure of the air flow output by the air pump 10 from being too large and causing damage to the inflation object. The maximum output air pressure of the air pump 10 can be set by selecting an appropriate elastic member 210.

[0037] In addition, in the first inflation state, the piston abuts against the end face of the communication hole 140 facing the piston to close the communication hole 140. At this time, the abutment between the piston and the end face is a surface-to-surface abutment. The high-pressure gas in the exhaust cavity 110 may flow out from the gap between the piston and the end face, resulting in a poor sealing effect of the piston on the communication hole 140, thereby causing the air pressure in the exhaust cavity 110 to drop, and further possibly affecting the inflation effect of inflating through the inflation port 130.

[0038] Therefore, please refer to Figure 3 , by providing an annular convex portion 231 on one of the side surface of the piston facing the communication hole 140 and the end surface of the communication hole 140 facing the piston, the projection of the convex portion 231 is located on the outer periphery of the communication hole 140, so as to improve the sealing effect of the piston on the communication hole 140, thereby ensuring the inflation effect of the air pump 10 in the first inflation state. The annular convex portion 231 can break the surface-to-surface contact between the piston and the end surface of the communication hole 140 and form a lip-shaped structure. This lip-shaped structure can prevent gas from penetrating along the contact surface, effectively reducing the gas leakage path, thereby improving the sealing effect of the piston on the communication hole 140. The convex portion 231 can also be made of an elastic material. Under the abutment of the elastic member 210, the convex portion 231 is deformed to make the contact with the contact surface closer, so as to improve the sealing effect of the piston on the communication hole 140. In addition, when the elastic member 210 pushes the piston to close the communication hole 140, the collision between the piston and the end surface of the communication hole 140 can be reduced.

[0039] Furthermore, an additional convex portion 231 can be provided on one of the side surface of the piston facing the communication hole 140 and the end surface of the communication hole 140 facing the piston, and a groove adapted to the convex portion 231 is provided on the other. The adaptation of the groove and the convex portion 231 can increase the actual contact area between the piston and the end surface of the communication hole 140. Even if there are manufacturing tolerances or slight deformations, the design of the groove and the convex portion 231 can ensure sufficient contact area to maintain good sealing performance; the adaptation of the groove and the convex portion 231 can also reduce the displacement caused by vibration or external forces, thereby preventing the piston seal from failing; the adaptation of the groove and the convex portion 231 can also reduce the possibility of gas leakage through a straight path, because when gas attempts to pass through the gap between the piston and the end surface, it will encounter more obstacles, thereby increasing the difficulty of leakage.

[0040] The technical solution of the present utility model enables the air pump 10 to have two inflation states by providing a pressure regulating valve 200 in the pressure regulating passage 120. When the air pressure in the exhaust chamber 110 is greater than the maximum bearing pressure of the inflation object, part of the gas in the exhaust chamber 110 can be discharged from the pressure regulating passage 120 to reduce the air pressure in the exhaust chamber 110, thereby ensuring that the maximum output air pressure of the air pump 10 does not exceed the maximum bearing pressure of the inflation object, and further solving the problem that the inflation object is damaged due to excessive air pressure of the air flow output by the air pump 10.

[0041] In addition, an annular convex portion 231 is also provided on one of the side surface of the piston of the pressure regulating valve 200 facing the communication hole 140 and the end surface of the communication hole 140 facing the piston. The projection of the convex portion 231 is located on the outer periphery of the communication hole 140, so as to improve the sealing effect of the piston on the communication hole 140, thereby ensuring the inflation effect of the air pump 10 in the first inflation state.

[0042] In one embodiment, please refer to Figure 3 , the convex portion 231 is provided on one side of the piston facing the communication hole 140.

[0043] The communication hole 140 is formed in the pump body 100 and is located within the pressure regulating passage 120. It is difficult to machine the convex portion 231, and it is difficult to replace the convex portion 231 after long-term wear. The pump body 100 needs to be replaced, resulting in a high cost. Therefore, by providing the convex portion 231 on one side of the piston facing the communication hole 140, the difficulty of machining the convex portion 231 on the piston is reduced, thereby improving production efficiency. In addition, even if the convex portion 231 is worn, the cost of directly replacing the piston is lower compared to replacing the pump body 100.

[0044] Of course, in other embodiments, the convex portion 231 may also be provided on the end face of the end of the communication hole 140 facing the piston.

[0045] In one embodiment, please refer to Figures 2 to 4 , the piston includes a piston head 220 and a plug 230 that are separately provided. An installation groove is provided on one side of the piston head 220 facing the communication hole 140. The plug 230 is installed in the installation groove, and the convex portion 231 is provided on the plug 230.

[0046] The piston head 220 abuts against the elastic member 210 to bear the abutting force of the elastic member 210. The plug 230 is installed in the installation groove of the piston head 220 and is provided with the convex portion 231. When the elastic member 210 abuts and pushes the piston head 220 to cause the plug 230 to block the communication hole 140, the convex portion 231 on the plug 230 abuts against the end face of the communication hole 140, forming an effective seal to prevent the gas in the exhaust cavity 110 from leaking through the gap between the plug 230 and the end face of the communication hole 140. By setting the piston as a separate piston head 220 and plug 230, different materials can be selected for the piston head 220 and the plug 230 according to their respective functional requirements. For example, the piston head 220 can be made of a material with high strength and wear resistance such as aluminum alloy, and the plug 230 can be made of a material with good sealing performance such as rubber or silica gel. If the convex portion 231 on the plug 230 is worn, the plug 230 can be replaced separately without replacing the entire piston, thereby reducing the maintenance cost.

[0047] In one embodiment, please refer to Figure 2 and Figure 4 , the pressure regulating valve 200 further includes a valve cover 250. The valve cover 250 is connected to the end of the pressure regulating passage 120 away from the communication hole 140 and is provided with an air outlet 251 communicating with the pressure regulating passage 120. One end of the elastic member 210 abuts against the valve cover 250, and the other end abuts against the piston head 220.

[0048] The valve cover 250 is used on one hand to block one end of the pressure regulating passage 120 away from the communication hole 140, which can prevent the piston and the elastic member 210 from coming out of the pressure regulating passage 120. At the same time, it provides a contact point for the elastic member 210 to abut against, making the pressure regulating valve 200 more structurally compact and more reliable. It can also prevent external impurities from entering the pressure regulating passage 120 to ensure the cleanliness inside the pressure regulating passage 120. On the other hand, the valve cover 250 is detachably connected to the pressure regulating passage 120, which makes the assembly of the internal parts of the pressure regulating passage 120 more convenient, and the maintenance and replacement are also more convenient. In addition, the valve cover 250 is provided with an air outlet 251 communicating with the pressure regulating passage 120. The gas in the exhaust cavity 110 can be discharged from the communication hole 140 through the pressure regulating passage 120 and out of the air outlet 251 into the atmosphere in the second inflation state, realizing the function of the pressure regulating valve 200 to regulate the internal air pressure of the exhaust cavity 110. One end of the elastic member 210 abuts against the valve cover 250, and the other end abuts against the piston head 220, which is used to provide the restoring force of the piston to ensure that the piston can abut against and close the communication hole 140 in the first inflation state.

[0049] In one embodiment, please refer to Figure 2 and Figure 4 , the valve cover 250 is further provided with a guiding passage 252. One end of the guiding passage 252 communicates with the pressure regulating passage 120, and the other end communicates with the air outlet 251. The piston further includes a piston rod 240. One end of the piston rod 240 is connected to the piston head 220, and the other end passes through the guiding passage 252 and can telescopically move along the extending direction of the guiding passage 252.

[0050] The valve cover 250 is further provided with a guiding passage 252, which is used to provide a guiding effect for the piston rod 240 to ensure that the piston rod 240 smoothly moves along the extending direction of the guiding passage 252, so that the whole piston can move more smoothly during the movement process. One end of the guiding passage 252 communicates with the pressure regulating passage 120, and the other end communicates with the air outlet 251. In the second inflation state, in addition to the air flow in the pressure regulating passage 120 being directly discharged from the air outlet 251, part of the air flow can also flow from the guiding passage 252 to the air outlet 251 and then be discharged.

[0051] Part of the air outlet 251 is formed at one end of the guiding passage 252 away from the piston, and part of it is formed on the outer wall of the guiding passage 252.

[0052] In one embodiment, please refer to Figure 2 and Figure 4 , the pressure regulating valve 200 further includes a silencing member 260, and the silencing member 260 is arranged at the air outlet 251.

[0053] In the second state, the air pressure in the exhaust chamber 110 is relatively high, and the noise generated when discharging from the air outlet 251 is also relatively high. The main purpose of setting the silencing member 260 is to reduce the noise generated when high-pressure gas passes through the air outlet 251. The silencing member 260 absorbs sound wave energy or changes the propagation direction of sound waves by using porous materials or specially designed structures, thereby reducing noise. At the same time, the silencing member 260 can also make the gas flow more smoothly, reduce turbulence and vibration, and improve the stability of the air pump 10 during exhaust. The silencing member 260 can be specifically configured as sound-absorbing cotton, foam, fiber, a micro-perforated plate silencer composed of a metal plate with tiny holes, a damping silencer made of damping material, etc.

[0054] In one embodiment, please refer to Figure 4 , a limiting member 270 is further provided on the outer surface of the valve cover 250. The limiting member 270 includes a limiting baffle 271 and a limiting buckle 272. The limiting baffle 271 is provided on the outer periphery of the silencing member 260, and the limiting buckle 272 is provided at one end of the limiting baffle 271 away from the valve cover 250. The limiting member 270 and the valve cover 250 jointly form a receiving groove, and the silencing member 260 is arranged in the receiving groove and can move in the height direction of the limiting baffle 271.

[0055] The limiting baffle 271 is provided on the outer periphery of the silencing member 260 to limit the movement of the silencing member 260 in the circumferential direction of the air outlet 251. The limiting buckle 272 is provided at one end of the limiting baffle 271 away from the valve cover 250 to limit the movement of the silencing member 260 in the axial direction of the air outlet 251. The receiving groove is a cavity formed between the limiting baffle 271, the limiting buckle 272 and the valve cover 250, providing a fixed installation space for the silencing member 260, and at the same time ensuring that the silencing member 260 will not have unnecessary displacement during use, effectively preventing it from moving excessively or falling off. The silencing member 260 can move in the height direction of the limiting baffle 271 in the receiving groove, that is, when the air flow discharges from the air outlet 251, the air flow can blow the silencing member 260 away from the air outlet 251 to facilitate the discharge of the air flow. Due to the existence of the limiting buckle 272, the silencing member 260 will not fall off and will re-block the air outlet 251 after the exhaust of the air outlet 251 is completed, preventing foreign impurities from entering the pressure regulating channel 120 from the air outlet 251.

[0056] In one embodiment, please refer to Figure 2 and Figure 4 , the valve cover 250 is threadedly connected to the inner wall surface of the pressure regulating channel 120.

[0057] The valve cover 250 has external threads, and the inner wall surface of the pressure regulating passage 120 is machined with internal threads so as to be screwed with the external threads on the valve cover 250. The valve cover 250 is threadedly connected to the inner wall surface of the pressure regulating passage 120, so that the valve cover 250 and the pressure regulating passage 120 are detachably connected, facilitating the disassembly and reassembly of the valve cover 250 and the internal components of the pressure regulating passage 120. This not only simplifies the installation process of the pressure regulating valve 200, but also improves the reliability and maintenance efficiency of the pressure regulating valve 200.

[0058] In one embodiment, the plug 230 is made of an elastic material.

[0059] The elastic material has good deformation ability, can well fill the gap, and better fit the end face of the communication hole 140, thus forming an effective seal to prevent gas from leaking from the communication hole 140 in the first inflation state. The elastic material absorbs vibration energy and reduces the damage to the end face of the communication hole 140 caused by the pushing of the elastic member 210. Specifically, the plug 230 can be made of rubber, silica gel, thermoplastic elastomer, etc.

[0060] In one embodiment, please refer to Figure 1 and Figure 5 , the air pump 10 further includes a motor assembly 300, the pump body 100 further includes a compression chamber 150 and a compression assembly disposed in the compression chamber 150. The compression chamber 150 is disposed between the motor assembly 300 and the exhaust chamber 110. The compression assembly includes a plurality of air bags 160. The motor assembly 300 is used to drive the air bags 160 to compress gas. The exhaust chamber 110 includes a central chamber 112 and a plurality of exhaust chambers 111 communicating with the central chamber 112. The plurality of exhaust chambers 111 communicate with the air bags 160 one by one. The inflation port 130 communicates with the central chamber 112, and the communication hole 140 communicates with one of the exhaust chambers 111.

[0061] The motor assembly 300 is used to provide a power source and drive the compression assembly through rotational or reciprocating motion. The motor assembly 300 can be an electric motor, a hydraulic motor, a pneumatic motor, etc. The compression chamber 150 is located between the motor assembly 300 and the exhaust chamber 110. The compression assembly is installed in the compression chamber 150 so that gas can be compressed in this space. Driven by the motor assembly 300, a plurality of air bags 160 compress gas in the compression chamber 150. The exhaust chamber 110 includes a central chamber 112 and a plurality of exhaust chambers 111. The plurality of exhaust chambers 111 are respectively communicated with the plurality of air bags 160 correspondingly to collect the compressed gas discharged from each air bag 160 and realize the communication between the respective exhaust chambers 111 through the central chamber 112. The inflation port 130 is communicated with the central chamber 112 so that the compressed gas can inflate the inflation object through the inflation port 130. The communication hole 140 is communicated with one of the exhaust chambers 111 and assists in regulating the pressure of the entire exhaust chamber 110 under the action of the pressure regulating valve 200 to ensure that the gas pressure discharged from the inflation port 130 is not greater than the maximum bearing pressure of the inflation object. Through continuous multi-stage compression, the gas compression efficiency can be improved to ensure that the air pressure in the exhaust chamber 110 can meet the air pressure requirements of the inflation object.

[0062] In one embodiment, please refer to Figure 1 , the air pump 10 further includes an inflation nozzle 400 provided at the inflation port 130. The inflation nozzle 400 and the pressure regulating valve 200 are provided on the same side of the pump body 100 away from the motor assembly 300.

[0063] The inflation nozzle 400 is provided at the inflation port 130 and is used to connect the interface of the inflation object, improving the convenience of the inflation operation. The inflation nozzle 400 and the pressure regulating valve 200 are provided on the same side, which not only facilitates the user's operation, but also helps to optimize the spatial layout of the air pump 10. The air pump 10 can be made more compact, the circumferential dimension of the air pump 10 can be reduced, and thus it is convenient to carry and store.

[0064] The above are only exemplary embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made under the technical concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied to other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. An air pump, characterized in that, The air pump includes: A pump body having an exhaust chamber, a pressure regulating passage, an inflation port and a communication hole communicating with the exhaust chamber. The pressure regulating passage communicates with the exhaust chamber through the communication hole; A pressure regulating valve disposed in the pressure regulating passage. The pressure regulating valve includes an elastic member and a piston. One end of the elastic member elastically abuts against the inner wall of the pressure regulating passage, and the other end abuts against the piston, so that the piston can open or block the communication hole, enabling the air pump to have a first inflation state and a second inflation state. In the first inflation state, the piston blocks the communication hole, so that the gas in the exhaust chamber is discharged from the inflation port. In the second inflation state, the piston opens the communication hole, so that part of the gas in the exhaust chamber is discharged from the pressure regulating passage; Wherein, one of the side surface of the piston facing the communication hole and the end surface of the communication hole facing one end of the piston is provided with an annular convex portion, and the projection of the convex portion is located on the outer periphery of the communication hole.

2. The air pump according to claim 1, characterized in that, The convex portion is provided on the side surface of the piston facing the communication hole.

3. The air pump according to claim 2, characterized in that, The piston includes a piston head and a plug arranged separately. An installation groove is provided on the side surface of the piston head facing the communication hole, and the plug is installed in the installation groove. The convex portion is provided on the plug.

4. The air pump according to claim 3, wherein, The pressure regulating valve further includes a valve cover. The valve cover is connected to one end of the pressure regulating passage away from the communication hole and is provided with an air outlet communicating with the pressure regulating passage. One end of the elastic member abuts against the valve cover, and the other end abuts against the piston head.

5. The air pump according to claim 4, characterized in that, The valve cover is further provided with a guiding passage. One end of the guiding passage communicates with the pressure regulating passage, and the other end communicates with the air outlet. The piston further includes a piston rod. One end of the piston rod is connected to the piston head, and the other end passes through the guiding passage and can telescopically move along the extending direction of the guiding passage.

6. The air pump according to claim 4, wherein, The pressure regulating valve further includes a sound-absorbing member, and the sound-absorbing member is disposed at the air outlet.

7. The air pump according to claim 6, characterized in that, A limiting member is further provided on the outer surface of the valve cover. The limiting member includes a limiting baffle and a limiting buckle. The limiting baffle is disposed on the outer periphery of the sound-absorbing member, and the limiting buckle is disposed at one end of the limiting baffle away from the valve cover. The limiting member and the valve cover together form a receiving groove, and the sound-absorbing member is disposed in the receiving groove and can move in the height direction of the limiting baffle.

8. The air pump according to claim 4, characterized in that, The valve cover is threadedly connected to the inner wall surface of the pressure regulating passage; And / or, the material of the plug is an elastic material.

9. The air pump according to claim 1, characterized in that, The air pump further includes a motor assembly. The pump body further includes a compression chamber and a compression assembly disposed in the compression chamber. The compression chamber is disposed between the motor assembly and the exhaust chamber. The compression assembly includes a plurality of air bags. The motor assembly is used to drive the air bags to compress gas. The exhaust chamber includes a central chamber and a plurality of exhaust chambers communicating with the central chamber. The plurality of exhaust chambers communicate with the air bags in one-to-one correspondence. The inflation port communicates with the central chamber, and the communication hole communicates with one of the exhaust chambers.

10. The air pump according to claim 9, characterized in that, The air pump further includes an inflation nozzle disposed at the inflation port, and the inflation nozzle and the pressure regulating valve are on the same side of the pump body away from the motor assembly.

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