Double-pump-core air pump

Abstract

The utility model provides a double-pump-core air pump, which comprises a piston pump core, an air outlet pipe, an air outlet branch pipe, an air inlet branch pipe, a first flow equalizing assembly and an impeller pump core, one end of the impeller pump core is provided with an air inlet, the air outlet branch pipe is arranged on the impeller pump core and is communicated with the impeller pump core and the air inlet, and the air inlet branch pipe is communicated with the first flow equalizing assembly. The air inlet branch pipe is arranged on the side wall of the air outlet pipe, the air outlet pipe is arranged at one end of the piston pump core and communicates with the piston pump core and the air inlet branch pipe, and the ends, close to each other, of the air outlet branch pipe and the air inlet branch pipe communicate through the first flow equalizing assembly. And the first flow equalizing assembly is used for uniformly dispersing airflow, so that the air pressure range of air pumped out by the air pump is expanded, the flow range of the air is enlarged, the inflation efficiency is improved, the use experience of a user is improved, the application scene of the air pump is enriched, the selectivity of the user is improved, and meanwhile, the turbulence degree of the airflow is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of air pumps, in particular to a double-pump core air pump. Background Art

[0002] With the development of society and the progress of science and technology, people's material and cultural living standards have been greatly improved, and people's entertainment life has become increasingly rich. Activities such as outdoor camping, surfing, and traveling have become an important part of people's daily lives. These activities often use inflatable products such as inflatable paddle boards, inflatable lifebuoys, and inflatable mattresses. People use air pumps to inflate inflatable products to achieve functions such as rapid inflation and deflation to shrink the space volume for easy storage.

[0003] Air pumps are already very common in the market and are popular among people for their portability. However, the inflation effect of air pumps currently on the market is not ideal. When inflating some inflatable products, different types of inflatable products need to be inflated with gases of different pressures to achieve better use effects. Some inflatable products require stable airflow when inflating to ensure the quality of the inflatable products. However, the pressure range of the gas pumped out by air pumps currently on the market is small, and the airflow pumped out is relatively turbulent.

[0004] Therefore, the utility model is dedicated to providing a double pump core air pump to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a dual-pump core air pump, which, by arranging an impeller pump core and a piston pump core, allows users to choose to use different types of pump cores for inflation according to the actual types of inflatable products, thereby enriching the user's selectivity, improving the air pressure range of the gas pumped out by the air pump, and improving the versatility of the air pump. At the same time, a first flow equalization component is arranged at the connection between the air inlet branch pipe and the air outlet branch pipe, which can equalize the flow of the gas, improve the stability of the gas, and ensure the quality of the inflatable product.

[0006] The technical solution provided by the utility model is as follows:

[0007] In some embodiments, a piston pump core, an air outlet pipe, an air outlet branch pipe, an air inlet branch pipe, a first flow balancing component and an impeller pump core are included, an air inlet is provided at one end of the impeller pump core, and the air outlet branch pipe is provided on the impeller pump core and communicated with the impeller pump core and the air inlet;

[0008] The air inlet branch pipe is arranged on the side wall of the air outlet pipe, and the air outlet pipe is arranged at one end of the piston pump core and is connected with the piston pump core and the air inlet branch pipe. The ends of the air outlet branch pipe and the air inlet branch pipe close to each other are connected through the first flow balancing component, and the first flow balancing component is used to evenly distribute the airflow.

[0009] In some embodiments, the first flow balancing component includes a joint pipe and a first grid, the ends of the joint pipe are respectively connected to the ends of the inlet branch pipe and the outlet branch pipe that are close to each other, and the first grid is arranged in the joint pipe and perpendicular to the length direction of the joint pipe;

[0010] The first grid is provided with a plurality of evenly distributed first flow balancing holes.

[0011] In some embodiments, a one-way valve is disposed in the joint pipe, and a flow direction of the one-way valve is configured to flow from the outlet branch pipe to the inlet branch pipe.

[0012] In some embodiments, the first flow balancing component further includes a second grid and a plurality of flow guide pipes, wherein the second grid is arranged in the intake branch pipe perpendicular to the length direction of the intake branch pipe and is located on a side of the first grid away from the impeller pump core;

[0013] The second grid is provided with second flow balancing holes matched with the flow guide tube, the second flow balancing holes are arranged in one-to-one correspondence with the flow guide tube, and are evenly distributed on the second grid;

[0014] One end of the flow guide pipe is disposed through the second flow equalizing hole and is located at an end of the second grid away from the first grid.

[0015] In some embodiments, a second flow balancing component is further included, the second flow balancing component includes a flow balancing cover and a third grid, the flow balancing cover is arranged at one end of the outlet pipe away from the pump core of the piston pump, and the third grid is arranged at one end of the flow balancing cover away from the outlet pipe;

[0016] The third grid is provided with a plurality of third flow balancing holes, and the third flow balancing holes are in a honeycomb shape.

[0017] In some embodiments, the impeller pump core includes a first casing, a second casing, an impeller and a first motor, the first casing and the second casing are sequentially connected to form an impeller chamber, and the impeller is rotatably disposed in the impeller chamber;

[0018] The second housing is provided with an air outlet, the air outlet branch is connected to the air outlet, so that the impeller chamber is connected to the air outlet branch, and the air inlet is opened on the first housing and communicates with the impeller chamber;

[0019] The first motor is arranged at an end of the second casing away from the first casing and is drivingly connected to the impeller.

[0020] In some embodiments, the piston pump core includes a cylinder, a second motor, a push rod and a piston, the piston is movably disposed in the cylinder, the air outlet pipe is disposed at one end of the cylinder, and a plurality of vent holes are disposed at one end of the cylinder close to the air outlet pipe;

[0021] One end of the push rod is connected to an end of the piston away from the vent hole, the other end of the push rod is connected to a cam, and the second motor is transmission-connected to the cam to drive the piston to reciprocate in the cylinder body along the extension direction of the cylinder body.

[0022] In some embodiments, one end of the outlet branch pipe is sleeved on the outside of one end of the connecting pipe, and the other end of the connecting pipe is provided with two corresponding clips. A positioning column is provided on the inlet branch pipe, and the clip is suitable for engaging with the positioning column, so that the connecting pipe is connected and fixed to the inlet branch pipe.

[0023] In some embodiments, an air inlet pipe is further included, and the air inlet pipe is connected to the air inlet.

[0024] In some embodiments, it further comprises a housing, wherein two mounting seats are arranged on the bottom wall of the housing, and the impeller pump core and the piston pump body are respectively clamped on the mounting seats;

[0025] A first through hole and a second through hole are arranged on the side wall of the shell, the air inlet pipe is arranged through the first through hole, and the air outlet pipe is arranged through the second through hole.

[0026] The double pump core air pump provided by the utility model has the following beneficial effects:

[0027] 1. The utility model provides a double-pump core air pump, which provides an impeller pump core and an air charging pump core. The impeller pump core and the air charging pump core can work independently of each other. For some inflatable products with large flow and small pressure requirements, users can choose the impeller pump core to work alone and the piston pump core to stop working. While meeting the inflation requirements, the use cost is reduced and the adverse effect of high air pressure on the inflatable products is reduced. For some inflatable products with large flow and large pressure requirements, users can choose the piston pump core to work alone and the impeller pump core to stop working. The piston pump core can meet the requirements of the inflatable products for large flow and atmospheric pressure, thereby expanding the flow and air pressure range of the air pump and improving the user's selectivity. In addition, when the impeller pump core or the piston pump core is working, the gas inhaled from the external environment will be affected by the first flow equalizing component, which can equalize the gas, improve the stability and uniformity of the gas pumped out by the air pump, and reduce the adverse effect of turbulence on the inflatable products.

[0028] 2. The utility model provides a double-pump core air pump, which is equipped with a one-way valve in the joint pipe so that the flow direction is coordinated to flow from the outlet branch pipe to the inlet branch pipe. The setting of the one-way valve can effectively prevent the gas from flowing back, ensuring that the gas can enter the inflatable product through the outlet pipe, thereby ensuring the inflation effect.

[0029] 3. The utility model provides a dual-pump core air pump, in which a second flow balancing component is provided at one end of the outlet pipe away from the piston pump body, which can cooperate with the first flow balancing component to balance the gas pumped out by the piston pump core or the impeller pump core, further improve the stability of the gas pumped out, and reduce the adverse effects of turbulence on inflatable products. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The preferred implementation scheme will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present solution.

[0031] Figure 1 This is a structural diagram of a double pump core air pump provided by the utility model;

[0032] Figure 2 It is a cross-sectional view of a double pump core air pump provided by the utility model;

[0033] Figure 3 The utility model discloses a structural diagram of a joint pipe of a double-pump core air pump.

[0034] Description of Figure Numbers:

[0035] Piston pump core 100, outlet pipe 110, inlet branch pipe 120, cylinder body 130, second motor 140, push rod 150, piston 160, cam 170, impeller pump core 200, inlet pipe 210, outlet branch pipe 220, first cover shell 230, second cover shell 240, impeller 250, first motor 260, first flow equalizing component 300, connecting pipe 310, buckle 311, one-way valve 312, first grille 320. DETAILED DESCRIPTION

[0036] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0037] In order to simplify the drawings, only the parts related to the utility model are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0038] In this document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0040] In one embodiment, a dual-pump core air pump is described, which provides an impeller pump core 200 and a piston pump core 100. The user can choose to use the impeller pump core 200 or the piston pump core 100 for inflation according to different types of inflatable products, thereby expanding the air pressure and flow range of the gas pumped out by the air pump, and the inflation effect is better, which can meet the needs of inflatable products with higher requirements. In addition, the outlet branch pipe 220 and the inlet branch pipe 120 are also provided with a first flow equalizing component 300 at the connection, which can equalize the air inhaled from the external environment and improve the stability of the gas pumped out by the air pump.

[0041] Specifically, see the attached drawings of the specification Figures 1 to 3 A double pump core air pump includes an impeller pump core 200 and a piston pump core 100. An outlet pipe 110 is provided at one end of the piston pump core 100, and the gas pumped out by the piston pump core 100 when working can be discharged through the outlet pipe 110. Correspondingly, an air inlet is provided at one end of the impeller pump core 200, and an outlet branch pipe 220 is also provided on the impeller pump core 200. An inlet branch pipe 120 is also provided on the side wall of the outlet pipe 110, and the outlet pipe 110 is connected to the inlet branch pipe 120 and is connected to the outlet pipe 110. Among them, a first flow equalizing component 300 is provided at one end where the outlet branch pipe 220 and the inlet branch pipe 120 are close to each other, so that the inlet branch pipe 120 and the outlet branch pipe 220 are connected through the first flow equalizing component 300.

[0042] The outlet branch pipe 220 is connected to the impeller pump core 200 and the air inlet, and the gas in the external environment enters the impeller pump core 200 through the air inlet, and flows into the outlet branch pipe 220, and then flows into the air inlet branch pipe 120 and the air outlet pipe 110 after passing through the first flow equalizing component 300. In this process, the first flow equalizing component 300 plays a role in evenly distributing the gas and reducing the degree of gas turbulence, thereby improving the stability of the gas pumped out by the air pump and meeting the demand for stable airflow for some inflatable products.

[0043] The piston pump core 100 and the impeller pump core 200 are interconnected through the air inlet branch 120, the air outlet branch 220 and the first flow equalization component. In actual production applications, users can choose to use the piston pump core 100 or the impeller pump core 200 to work alone according to actual needs. Specifically, when the user inflates some inflatable items with low air pressure requirements, the impeller pump core 200 can work alone, the piston pump core 100 does not work, and the gas in the external environment enters the impeller pump core 200 through the air inlet, and after the acceleration and pressurization of the impeller pump core 200, it flows into the air outlet branch 220, and then after the flow equalization of the first flow equalization component 300, the gas enters the air inlet branch 120, and then is discharged through the air outlet pipe 110. When the user inflates some inflatable items with higher air pressure requirements, the piston pump core 100 can work alone, and the impeller pump core 200 does not work. The gas in the external environment enters the impeller pump core 200 through the air inlet, and then enters the air outlet branch 220. After the first flow equalization component 300 acts, it enters the air inlet branch 120 and the air outlet pipe 110, and then enters the piston pump core 100. After the action of the piston pump core 100, it is discharged through the air outlet pipe 110. Therefore, by setting the piston pump core 100 and the impeller pump core 200 in the air pump, the air pressure and flow rate of the gas pumped out by the two pump cores are different. Compared with the air pump in the prior art that only one pump core is set, the air pressure and flow rate range of the gas pumped out by the air pump are greatly expanded.

[0044] It is understandable that when the piston pump core 100 or the impeller pump core 200 works alone, the gas sucked in from the external environment can be affected by the first flow equalization component 300, which improves the stability of the gas pumped out by the air pump and ensures the inflation effect of the inflatable product.

[0045] In one embodiment, referring to the accompanying drawings, Figures 1 to 3In this embodiment, the impeller pump core 200 and the piston pump core 100 are further described. Specifically, the impeller pump core 200 includes a first housing 230, a second housing 240, an impeller 250 and a first motor 260. The first housing 230 and the second housing 240 are sequentially connected to form an impeller chamber at the connection between the first housing 230 and the second housing 240, and the impeller 250 is rotatably arranged in the impeller chamber.

[0046] Furthermore, the second housing 240 is also provided with an air outlet, which is interconnected with the air outlet branch pipe 220, so that the impeller chamber and the air outlet branch pipe 220 are interconnected. Correspondingly, the air inlet is provided on the first housing 230 and is connected with the impeller chamber. The first motor 260 is provided at one end of the second housing 240 away from the first housing 230, and is in transmission connection with the impeller 250, thereby driving the impeller 250 to rotate. When the impeller pump core 200 is working, the first motor 260 drives the impeller 250 to rotate, and the gas enters the impeller chamber through the air inlet, and under the action of the impeller 250, enters the air outlet branch pipe 220 through the air outlet.

[0047] Furthermore, the piston pump core 100 includes a cylinder 130, a second motor 140, a push rod 150 and a piston 160, wherein a receiving chamber is provided in the cylinder 130, and the piston 160 is movably provided in the receiving chamber of the cylinder 130. The air outlet pipe 110 is provided at one end of the cylinder 130, and correspondingly, a plurality of vents are provided at one end of the cylinder 130 close to the air outlet pipe 110, and the air outlet pipe 110 is connected to the cylinder 130 through the vents. When the piston 160 moves in the cylinder 130, the piston 160 inhales or discharges gas through the vents.

[0048] Correspondingly, one end of the push rod 150 is connected to the end of the piston 160 away from the vent hole, and the other end of the push rod 150, that is, the end of the push rod 150 away from the piston 160, is connected to the cam 170. The second motor 140 is in transmission connection with the cam 170 to drive the cam 170 to rotate, thereby driving the push rod 150 to move, thereby driving the piston 160 to reciprocate in the cylinder body 130 along the extension direction of the cylinder body 130.

[0049] It can be understood that when the piston pump core 100 works alone, under the action of the piston 160, the gas enters the impeller pump core 200 through the air inlet, and enters the outlet pipe 110 through the air outlet, the outlet branch pipe 220, the first flow equalizing component 300 and the air inlet branch pipe 120, and through the reciprocating motion of the piston 160, the gas is pressurized and finally discharged through the outlet pipe 110.

[0050] In one embodiment, this embodiment provides a specific form of a first flow balancing component 300. Specifically, the first flow balancing component 300 includes a joint pipe 310 and a first grid 320, the two ends of the joint pipe 310 are respectively connected to the ends of the outlet branch pipe 220 and the inlet branch pipe 120 that are close to each other, and the first grid 320 is arranged in the joint pipe 310 and is arranged perpendicular to the length direction of the joint pipe 310. Accordingly, a plurality of first flow balancing holes are arranged on the first grid 320, and the plurality of first flow balancing holes are evenly distributed on the first grid 320. When the gas enters the inlet branch pipe 120 through the outlet branch pipe 220, the first flow balancing holes can even the airflow and reduce the turbulence of the gas.

[0051] Correspondingly, one end of the air outlet branch pipe 220 is sleeved on one end of the joint pipe 310 and is interference fit with the joint pipe 310. The other end of the joint pipe 310 is provided with two clips 311, and the two clips 311 are arranged correspondingly. Correspondingly, a positioning column matching with the clip 311 is provided on the air intake branch pipe 120, and the clip 311 and the positioning column are mutually engaged through the mutual engagement of the clip 311 to realize the connection and fixation between the joint pipe 310 and the air intake branch pipe 120.

[0052] Of course, in actual production applications, there are many ways to connect the joint pipe 310 with the intake branch pipe 120 and the outlet branch pipe 220. For example, the joint pipe 310 and the intake branch pipe 120 are connected by interference fit or screws, etc., which are not explained here one by one and are all within the protection scope of the present utility model.

[0053] Further, see the accompanying drawings of the specification Figure 2 A one-way valve 312 is also provided in the connecting pipe 310, and the flow direction of the one-way valve is configured to flow from the outlet branch pipe 220 to the inlet branch pipe 120, so that the gas can only flow into the inlet branch pipe 120 through the outlet branch pipe 220, but cannot flow from the inlet branch pipe 120 to the outlet branch pipe 220, which can effectively prevent the gas from flowing back into the impeller pump core 200, thereby ensuring the stability of the gas and the working effect of the air pump.

[0054] In one embodiment, this embodiment further describes the first flow balancing component 300. Specifically, the first flow balancing component 300 further includes a second grid (not marked in the drawings) and a flow guide tube (not marked in the drawings), wherein the second grid is arranged in the intake branch pipe 120, the second grid is arranged vertically along the length direction of the intake branch pipe 120, and is located on the side of the first grid 320 away from the impeller pump core 200. The second grid is provided with a plurality of evenly distributed second flow balancing holes, and the flow guide tubes are provided in a plurality and are arranged one-to-one corresponding to the second flow balancing holes.

[0055] Correspondingly, one end of the guide pipe is arranged through the second flow balancing hole and is located at one end of the second grille away from the first grille 320. It can be understood that when the gas in the external environment enters the outlet branch pipe 220, after the flow balancing effect of the first grille 320, it enters the inlet branch pipe 120 through the one-way valve 322, and is also affected by the second grille in the inlet branch pipe 120, and the gas flows into the outlet pipe 110 through the guide pipe.

[0056] It is worth noting that the provision of the second grid and the guide tube further improves the stability of the gas and reduces the degree of turbulence, thereby enhancing the stability of the gas pumped out by the air pump and reducing the adverse effects of turbulence on inflatable products.

[0057] In one embodiment, this embodiment further describes the dual-pump core air pump. Specifically, the dual-pump core air pump also includes a second flow equalization component (not marked in the attached drawings), the second flow equalization component includes a flow equalization cover and a third grid, wherein the flow equalization cover is arranged at one end of the outlet pipe 110 away from the piston pump core 100, the third grid is arranged at one end of the guide cover away from the outlet pipe 110, and a plurality of third flow equalization holes are arranged on the third grid, and the third flow equalization holes are arranged in a honeycomb shape, which can equalize the gas discharged from the outlet pipe 110, and further improve the uniformity of the discharged gas.

[0058] It is understandable that when the impeller pump core 200 works alone, the gas in the external environment enters the outlet pipe 110 after the flow equalization of the first flow equalization component 300, and is discharged into the inflatable product after the flow equalization of the second flow equalization component. When the piston pump core 100 works alone, the piston pump core 100 sucks the gas in the external environment into the outlet branch pipe 220, and under the action of the first flow equalization component 300, enters the outlet pipe 110, and then is discharged through the outlet pipe 110 and the second flow equalization component under the pressurization of the piston pump core 100. Therefore, the setting of the second flow equalization component further improves the stability of the gas pumped out by the air pump.

[0059] In one embodiment, this embodiment further describes the impeller pump core 200, see the accompanying drawings of the specification. Figure 1 The impeller pump core 200 further includes an air inlet pipe 210 , which is connected to the air inlet.

[0060] Furthermore, the dual-pump core air pump also includes a shell, and two mounting seats are arranged on the bottom wall of the shell. The impeller pump core 200 and the piston pump core 100 are respectively arranged on the mounting seats and are engaged with each other to fix the impeller pump core 200 and the piston pump core 100 in the shell.

[0061] Correspondingly, a first through hole and a second through hole are also provided on the side wall of the shell. The air inlet pipe 210 is provided through the first through hole to inhale air from the external environment, and the air outlet pipe 110 is provided through the second through hole to inflate the inflatable product.

[0062] It should be noted that the above embodiments can be freely combined as needed. The above is only a preferred implementation of the utility model. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications should also be regarded as the protection scope of the utility model.

Claims

1. A double pump core air pump, characterized in that: It includes a piston pump core, an air outlet pipe, an air outlet branch pipe, an air inlet branch pipe, a first flow balancing component and an impeller pump core, wherein one end of the impeller pump core is provided with an air inlet, and the air outlet branch pipe is provided on the impeller pump core and is connected with the impeller pump core and the air inlet; The air inlet branch pipe is arranged on the side wall of the air outlet pipe, and the air outlet pipe is arranged at one end of the piston pump core and is connected with the piston pump core and the air inlet branch pipe. The ends of the air outlet branch pipe and the air inlet branch pipe close to each other are connected through the first flow balancing component, and the first flow balancing component is used to evenly distribute the airflow.

2. A double pump core air pump according to claim 1, characterized in that: The first flow balancing component includes a joint pipe and a first grid, the ends of the joint pipe are respectively connected to the ends of the inlet branch pipe and the outlet branch pipe that are close to each other, and the first grid is arranged in the joint pipe and perpendicular to the length direction of the joint pipe; The first grid is provided with a plurality of evenly distributed first flow balancing holes.

3. A double pump core air pump according to claim 2, characterized in that: A one-way valve is arranged in the joint pipe, and the flow direction of the one-way valve is configured to flow from the outlet branch pipe to the inlet branch pipe.

4. A double pump core air pump according to claim 3, characterized in that: The first flow balancing component further includes a second grid and a plurality of flow guide pipes, wherein the second grid is arranged in the intake branch pipe perpendicular to the length direction of the intake branch pipe and is located on a side of the first grid away from the impeller pump core; The second grid is provided with second flow balancing holes matched with the flow guide tube, the second flow balancing holes are arranged in one-to-one correspondence with the flow guide tube, and are evenly distributed on the second grid; One end of the flow guide pipe is disposed through the second flow equalizing hole and is located at an end of the second grid away from the first grid.

5. A double pump core air pump according to claim 4, characterized in that: It also includes a second flow balancing component, which includes a flow balancing cover and a third grid, wherein the flow balancing cover is arranged at one end of the outlet pipe away from the pump core of the piston pump, and the third grid is arranged at one end of the flow balancing cover away from the outlet pipe; The third grid is provided with a plurality of third flow balancing holes, and the third flow balancing holes are in a honeycomb shape.

6. A double pump core air pump according to any one of claims 1-5, characterized in that: The impeller pump core comprises a first casing, a second casing, an impeller and a first motor, the first casing and the second casing are sequentially connected to form an impeller chamber, and the impeller is rotatably arranged in the impeller chamber; The second housing is provided with an air outlet, the air outlet branch is connected to the air outlet, so that the impeller chamber is connected to the air outlet branch, and the air inlet is opened on the first housing and communicates with the impeller chamber; The first motor is arranged at an end of the second casing away from the first casing and is drivingly connected to the impeller.

7. A double pump core air pump according to claim 6, characterized in that: The piston pump core comprises a cylinder body, a second motor, a push rod and a piston, wherein the piston is movably arranged in the cylinder body, the air outlet pipe is arranged at one end of the cylinder body, and a plurality of air vents are arranged at one end of the cylinder body close to the air outlet pipe; One end of the push rod is connected to an end of the piston away from the vent hole, the other end of the push rod is connected to a cam, and the second motor is transmission-connected to the cam to drive the piston to reciprocate in the cylinder body along the extension direction of the cylinder body.

8. A double pump core air pump according to claim 4, characterized in that: One end of the outlet branch pipe is sleeved on the outside of one end of the joint pipe, and the other end of the joint pipe is provided with two corresponding clips. A positioning column is provided on the intake branch pipe, and the clip is suitable for engaging with the positioning column, so that the joint pipe is connected and fixed to the intake branch pipe.

9. A double pump core air pump according to claim 8, characterized in that: It also includes an air intake pipe, which is connected to the air intake port.

10. A double pump core air pump according to claim 9, characterized in that: It also includes a housing, wherein two mounting seats are arranged on the bottom wall of the housing, and the impeller pump core and the piston pump body are respectively clamped on the mounting seats; A first through hole and a second through hole are arranged on the side wall of the shell, the air inlet pipe is arranged through the first through hole, and the air outlet pipe is arranged through the second through hole.

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