Inflator pump with high and low air pressure switching inflation function

Abstract

The utility model discloses an inflator pump with a high and low air pressure switching inflation function, which belongs to the technical field of inflator pumps and comprises a high-pressure air duct and a low-pressure air duct which are arranged side by side, a high-pressure fan is mounted at the tail end of the high-pressure air duct, a low-pressure fan is mounted at the tail end of the low-pressure air duct, and an air inlet is formed in the front end of the low-pressure air duct. The front end of the high-pressure air duct is an air outlet; the side face of the low-pressure air channel communicates with an inner side pipe, and the side face of the high-pressure air channel communicates with an outer side pipe which is installed on the inner side of the outer side pipe in a sealed mode. One-way valves are mounted at the tail ends of the inner tubes. The one-way valve is arranged between the low-pressure air duct and the high-pressure air duct, so that the high-pressure air inflation and low-pressure air inflation switching function is achieved; the functions of one-way valve sealing and one-way circulation are achieved through the annular metal sealing piece, the reset spring, the first sealing rubber ring and the second sealing rubber ring, the air leakage problem caused by deformation under high air pressure is avoided, and the high-low air pressure switching stability of the air pump is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of inflator, specifically is an inflator with high and low air pressure switching function. BACKGROUND

[0002] At present, there are many electric air pumps on the market that are specially used for inflating kayak paddle boards, and there are also many electric air pumps that are specially used for inflating tires. The main difference between them is that the air pressure of the air pump for inflating the paddle board can only reach about 20 PSI, while the air pressure of the air pump for inflating the tire can reach more than 40 PSI. The reason why the air pressure of the former can only reach about 20 PSI is that the one-way valve for switching between high and low pressure needs to effectively discharge low pressure gas, so it uses a one-way valve made of rubber silicone material. However, the one-way valve made of rubber silicone material cannot withstand higher air pressure, and once the pressure is too high, it will cause the one-way valve to deform and leak. It is difficult to switch between high and low air pressure with the same air pump. To solve the above problems, the utility model provides an inflator with high and low air pressure switching function. SUMMARY

[0003] In view of the above technical deficiencies, the utility model aims to provide an inflator with high and low air pressure switching function. When low pressure inflation is needed, only the low pressure fan is started to form a low pressure air flow in the low pressure air duct. The low pressure air flow flows into the high pressure air duct through the one-way valve, realizing the low pressure inflation function. When high pressure inflation is needed, only the high pressure fan is started to form a high pressure air flow in the high pressure air duct. At this time, due to the blocking of the one-way valve, the air flow can only flow out of the air outlet, realizing the function of high pressure inflation, and the high and low air pressure inflation switching function can be realized conveniently. The technical problems raised in the background art are solved.

[0004] To solve the above technical problems, the utility model adopts the following technical scheme: the utility model provides an inflator with high and low air pressure switching function, which comprises: a high pressure air duct and a low pressure air duct arranged side by side, a high pressure fan is installed at the end of the high pressure air duct, a low pressure fan is installed at the end of the low pressure air duct, the front end of the low pressure air duct is an air inlet, and the front end of the high pressure air duct is an air outlet; the side surface of the low pressure air duct is connected with an inner tube, the side surface of the high pressure air duct is connected with an outer tube, and the inner tube is sealingly installed inside the outer tube; a one-way valve is installed at the end of the inner tube.

[0005] Preferably, the one-way valve comprises a ring-shaped metal sealing sheet, a reset spring and a guide rod; the inner end of the inner tube is provided with a support frame, the guide rod is slidingly installed on the support frame, a limiting block is fixedly installed at the end of the guide rod, the ring-shaped metal sealing sheet is slidingly installed outside the guide rod, the reset spring is sleeved outside the guide rod, and the two ends of the reset spring are connected with the limiting block and the ring-shaped metal sealing sheet respectively; in a natural state, the ring-shaped metal sealing sheet seals the port of the inner end of the inner tube under the elastic force of the reset spring.

[0006] Preferably, the support frame comprises a ring-shaped plate, and the outer side of the ring-shaped plate is fixedly connected with the inner wall of the inner tube through a plurality of connecting rods; the guide rod is slidingly matched and installed inside the ring-shaped plate.

[0007] Preferably, a first sealing rubber ring is matched and installed in a ring-shaped groove formed in the inner side of the ring-shaped plate, and a second sealing rubber ring is matched and installed in a ring-shaped groove formed in the coaxial center of the inner end of the inner tube.

[0008] Preferably, a third sealing rubber ring is matched and installed in a ring-shaped groove formed in the coaxial center of the outer side of the inner tube.

[0009] The beneficial effects of the utility model lie in:

[0010] 1. When low-pressure inflation is needed, only the low-pressure fan is started to form a low-pressure airflow in the low-pressure air duct, the low-pressure airflow flows into the high-pressure air duct from the one-way valve, and the low-pressure inflation function is realized; when high-pressure inflation is needed, only the high-pressure fan is started to form a high-pressure airflow in the high-pressure air duct, at this time, due to the blockage of the one-way valve, the airflow can only flow out from the air outlet, the high-pressure inflation function is realized, and the high-low air pressure inflation switching function can be conveniently realized.

[0011] 2. The one-way valve sealing and one-way flow function are realized through the ring-shaped metal sealing sheet, the reset spring and the first and second sealing rubber rings, the air leakage problem caused by deformation under high air pressure is avoided, and the stability of the air pump high-low air pressure switching is ensured. ACCURATE DRAWINGS

[0012] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creating creative labor.

[0013] Figure 1 The structure schematic view of the air pump with high-low air pressure inflation switching function provided by the embodiments of the utility model.

[0014] Figure 2 is a sectional view of A-A in FIG. Figure 1 is a plan view.

[0015] Figure 3 is a sectional view of A-A in FIG.

[0016] Figure 4 is a plan view. Figure 3 is an enlarged view of A in FIG.

[0017] Figure 5 is a structure diagram of installing a one-way valve in an inner tube of a low-pressure air duct in the utility model.

[0018] Figure 6 is a sectional view of A-A in FIG. Figure 5

[0019] Figure 7 is an enlarged view of B in FIG. Figure 6

[0020] Reference signs: 1-high pressure air duct, 11-air outlet, 12-outer tube, 2-low pressure air duct, 21-air inlet, 22-inner tube, 221-second sealing rubber ring, 222-third sealing rubber ring, 3-high pressure fan, 4-low pressure fan, 5-one-way valve, 51-ring-shaped metal sealing sheet, 52-return spring, 53-guide rod, 531-limiting block, 541-ring-shaped plate, 542-linkage, 543-first sealing rubber ring. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0022] Embodiment one:

[0023] As Figures 1 to 7 ​​As shown, the embodiment provides an air pump with switching high and low pressure inflation function, comprising: high pressure air duct 1 and low pressure air duct 2 arranged side by side, high pressure fan 3 is installed at the end of high pressure air duct 1, low pressure fan 4 is installed at the end of low pressure air duct 2, the front end of low pressure air duct 2 is air inlet 21, the front end of high pressure air duct 1 is air outlet 11; low pressure air duct 2 side is communicated with inner tube 22, high pressure air duct 1 side is communicated with outer tube 12, inner tube 22 is sealed and installed inside outer tube 12; one-way valve 5 is installed at the end of inner tube 22, one-way valve 5 only allows the gas in low pressure air duct 2 to flow into high pressure air duct 1, realizing the air flow from air inlet 21 into and from air outlet 11. When low pressure inflation is needed in actual use, only low pressure fan 4 is started to form low pressure air flow in low pressure air duct 2 (the low pressure air flow here is relative to the high pressure air flow in high pressure air duct 1, in fact, the low pressure air flow is also higher than atmospheric pressure), the low pressure air flow flows into high pressure air duct 1 from one-way valve 5, and then flows out from air outlet 11, realizing the low pressure inflation function. When high pressure inflation is needed, only high pressure fan 3 is started to form high pressure air flow in high pressure air duct 1, at this time, due to the blockage of one-way valve 5, the air flow can only flow out from air outlet 11, realizing the function of high pressure inflation, which can conveniently realize the switching function of high and low pressure inflation.

[0024] Further, please refer to Figure 4 and Figure 7As shown, the one-way valve 5 includes a ring-shaped metal sealing sheet 51, a reset spring 52 and a guide rod 53; the inner end of the inner tube 22 is provided with a support frame, the guide rod 53 is slidingly installed on the support frame, the end of the guide rod 53 is fixedly installed with a limiting block 531, the ring-shaped metal sealing sheet 51 is sleeved and slidingly installed outside the guide rod 53, the reset spring 52 is sleeved outside the guide rod 53, and the two ends of the reset spring 52 are connected with the limiting block 531 and the ring-shaped metal sealing sheet 51 respectively; in a natural state, under the elastic force of the reset spring 52, the ring-shaped metal sealing sheet 51 seals the end port of the inner tube 22; when the low-pressure air duct 2 forms a low-pressure air flow, the ring-shaped metal sealing sheet 51 is pushed away under the action of the low-pressure air flow, the low-pressure air flow flows smoothly into the high-pressure air duct 1, and then flows out from the air outlet 11, realizing the high-pressure inflation function; when the high-pressure air duct forms a high-pressure air flow, the high-pressure air flow further presses the ring-shaped metal sealing sheet 51, realizing the one-way valve 5 not to flow, and realizing the high-pressure inflation function. Further, the support frame includes a ring-shaped plate 541, the outer side of the ring-shaped plate 541 is fixedly connected with the inner wall of the inner tube 22 through a plurality of connecting rods 542, and the guide rod 53 is slidingly and matchingly installed inside the ring-shaped plate 541; actually, the outer side of the ring-shaped plate 541, the outer side of the plurality of connecting rods 542 and the outer side of the inner tube 22 are coplanar, so that the ring-shaped metal sealing sheet 51 can better realize sealing. The one-way valve sealing and one-way flow functions are realized through the ring-shaped metal sealing sheet 51, the reset spring 52 and the first sealing rubber ring 543 and the second sealing rubber ring 221, the air leakage problem caused by deformation under high air pressure is avoided, and the stability of the air pump high-low air pressure switching is ensured.

[0025] Further, as shown in the drawings, the first sealing rubber ring 543 is matchingly installed in the annular groove formed in the inner side of the ring-shaped plate 541, and the second sealing rubber ring 221 is matchingly installed in the annular groove coaxially formed in the end of the inner tube 22; the good sealing performance of the ring-shaped metal sealing sheet 51 sealing the end port of the inner tube 22 is ensured. Further, the third sealing rubber ring 222 is matchingly installed in the annular groove coaxially formed in the outer side of the inner tube 22, and the sealing performance between the inner tube 22 and the outer tube 12 is ensured, which is convenient and practical.

[0026] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application belong to the scope of the claims of the present application and the equivalent technologies thereof, the present application also intends to include these modifications and variations.

Claims

1. An air pump with the function of switching between high and low air pressure inflation, characterized in that, include: A high-pressure air duct (1) and a low-pressure air duct (2) are arranged side by side. A high-pressure fan (3) is installed at the end of the high-pressure air duct (1), and a low-pressure fan (4) is installed at the end of the low-pressure air duct (2). The front end of the low-pressure air duct (2) is an air inlet (21), and the front end of the high-pressure air duct (1) is an air outlet (11). The low-pressure air duct (2) is connected to the inner pipe (22) on its side, and the high-pressure air duct (1) is connected to the outer pipe (12) on its side. The inner pipe (22) is sealed and installed inside the outer pipe (12). A one-way valve (5) is installed at the end of the inner pipe (22).

2. The air pump with high and low pressure switching function as described in claim 1, characterized in that, The one-way valve (5) includes an annular metal seal (51), a return spring (52), and a guide rod (53); the inner end of the inner tube (22) is provided with a support frame, the guide rod (53) is slidably mounted on the support frame, the end of the guide rod (53) is fixedly mounted with a limiting block (531), the annular metal seal (51) is sleeved and slidably mounted on the outside of the guide rod (53), the return spring (52) is sleeved on the outside of the guide rod (53), and the two ends of the return spring (52) are respectively connected to the limiting block (531) and the annular metal seal (51); in the natural state, under the elastic force of the return spring (52), the annular metal seal (51) seals the end port of the inner tube (22).

3. The air pump with high and low pressure switching function as described in claim 2, characterized in that, The support frame includes an annular plate (541), the outer side of which is fixedly connected to the inner wall of the inner tube (22) by several connecting rods (542), and the guide rod (53) is slidably matched and installed on the inner side of the annular plate (541).

4. The air pump with high and low pressure switching function as described in claim 3, characterized in that, The first sealing ring (543) is installed in the annular groove opened on the inner side of the annular plate (541), and the second sealing ring (221) is installed in the annular groove opened coaxially at the end of the inner tube (22).

5. The air pump with high and low pressure switching function as described in claim 4, characterized in that, The third sealing ring (222) is installed in the annular groove coaxially opened on the outer side of the inner tube (22).

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