Improved high-pressure electric air pump

Abstract

The utility model discloses an improved high-pressure electric air pump which comprises a pump shell with an air inlet and an air outlet and a motor, and an air inflation connector part for being connected with a connector is arranged on the outer side of the air outlet. The air pump is characterized in that a first pump cavity and a second pump cavity are sequentially arranged in the pump shell, the two motors are the first motor and the second motor respectively, the first motor is installed in the first pump cavity, the second motor is installed in the second pump cavity, and the air supply directions of the first motor and the second motor are the same and both face the air outlet; the first pump cavity and the second pump cavity are communicated through a vent hole, the air outlet is formed in the side portion of the first pump cavity, a cooling air outlet is formed in the front end of the first pump cavity, a cooling fan for cooling the first motor is arranged at the position of the cooling air outlet, a cooling air inlet is formed in the side portion of the first motor, and the air inlet is located in the rear end of the second pump cavity. The electric air pump has the advantages that the purpose of high-pressure air inflation can be achieved through the low-power motor, and air flow from the air outlet can be well cooled through the electric air pump.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of high pressure electric air pump, and the electric air pump is suitable for inflating air bed, rubber dinghy, tent and similar inflatable products. BACKGROUND

[0002] At present, inflatable products are more and more popular with consumers due to their convenient carrying and easy storage features. Some outdoor sports enthusiasts increasingly prefer to use inflatable products such as paddleboards, inflatable boats, inflatable tents and inflatable beds.

[0003] When a customer needs to inflate a product with high pressure, a high-pressure air pump is required. In the motor market, high-pressure motors are also made into high-airflow. For example, a Chinese utility model patent with the patent number ZL200420109808.5 (publication number CN2760295Y) discloses a high-pressure electric air pump, which includes a cylindrical shell, side cylinders are formed on the upper and lower sides of the cylindrical shell, and air guide pipes are formed in the side cylinders. The air guide pipe on the upper side is an air outlet pipe, and the air guide pipe on the lower side is an air inlet pipe. Protective covers are assembled at both ends of the cylindrical shell, and an air inlet and an air outlet are provided on one of the protective covers. The protective covers and the cylindrical shell form an inner side air chamber. A motor is provided in the cylindrical shell, and a fan II, an air chamber partition, a fan I and an air chamber cover are sequentially provided on one side of the motor shaft, thereby forming a motor chamber, a first air chamber and a second air chamber. When the motor is running, air enters the front end protective cover inner side air chamber from the air inlet, then enters the motor chamber, and then enters the rear end protective cover inner side air chamber through the air inlet pipe on the lower side of the cylindrical shell. The air then enters the first air chamber and the second air chamber in sequence, and finally is sent to the air outlet through the air outlet pipe on the upper side of the cylindrical shell to discharge the air pump. This structure uses one motor to drive two fans to rotate to increase the pressure.

[0004] The higher the power of the high-power motor with a fan on the market, the higher the pressure and air flow. However, some scenarios do not require air flow and only require high pressure. The aforementioned solution is not feasible. For example, a 300W motor can reach 4psi. This type of motor has high power, and high-power motors have high energy consumption. For example, a 300W motor can reach 4psi, but this pressure is not enough for some products. Increasing the power is not feasible, especially when the product has a battery: too large and heavy a battery cannot be used. In addition, if the air flow temperature at the air outlet is too high, it means that the motor is prone to overheating. It is best to ensure that the air flow temperature at the air outlet is not too high and that the motor can be cooled well.

[0005] Therefore, the current high-pressure electric air pump needs to be further improved to provide a solution that has high air pressure, low power and can cool the air flow at the air outlet well. UTILITY MODEL CONTENT

[0006] The utility model provides a kind of high pressure electric air pump of rational structure, can realize high pressure air filling purpose with low-power motor, and the electric air pump is better cooled to the airflow that the air outlet comes out.

[0007] The utility model discloses a kind of improved high pressure electric air pump, including the pump shell with air inlet and air outlet, and the motor installed in pump shell, the outside of air outlet is equipped with the air filling interface part for connecting connector connection;It is characterized by: the first pump cavity and the second pump cavity in sequence in the pump shell, the motor has two, is first motor and second motor respectively, the first motor is installed in the first pump cavity, the second motor is installed in the second pump cavity, the air sending direction of first motor and second motor is same and all towards the air outlet;Air hole is equipped between the first pump cavity and the second pump cavity, and the air outlet is located in the side of first pump cavity, and the front end of first pump cavity is equipped with cooling air outlet, the cooling fan for cooling first motor is equipped in the position of cooling air outlet, and the side of first motor is equipped with cooling air inlet, and the air inlet is located in the rear end of second pump cavity.

[0008] As improvement. One side of the above-mentioned air hole is equipped with a one-way valve, which opens the air hole in the direction of the air outlet and closes the air hole in the direction of the air hole. When the motor stops and the inflating product is still connected to the air pump, the air pressure in the inflating product will act on the one-way valve, causing the one-way valve to move and close the air hole or the air inlet or the air outlet. In this way, the air in the inflating product will not be discharged, and the air leakage protection function is achieved. During normal inflation, the airflow generated by the motor will cause the one-way valve to open, and the high-pressure airflow can normally pass through the air outlet to inflate the inflating product.

[0009] As preferred, the above-mentioned one-way valve is a one-way valve plate. Of course, the one-way valve can also be a valve rod held by a spring to maintain a closing tendency.

[0010] As preferred, the above-mentioned air inlet and cooling air outlet are coaxially arranged. This can make the pump shell structure more compact.

[0011] To facilitate the electric air pump to quickly pump air to the inflating product, the outside of the above-mentioned air inlet is equipped with an air pumping interface part for connecting connector connection. During air pumping, the inflating product is connected to the air pumping interface part through the connecting connector, and the motor works, which can more efficiently and quickly pump the gas in the inflating product out.

[0012] Further improvement, a grid is provided in the above-mentioned air inlet, and the air pumping interface part is located behind the grid. The grid is provided to ensure air intake while preventing larger debris from entering the motor and preventing fingers from being inserted into it, thereby improving safety.

[0013] As an improvement, the pump housing comprises a first pump housing and a second pump housing, which are fixed by mutual insertion. The first pump housing and the second pump housing are inserted into each other and constrained to each other, so that the connection of the first pump housing and the second pump housing is more stable.

[0014] In order to make the overall product appearance beautiful and convenient to carry, a shell is further included, the pump housing is installed in the shell, and a power supply for supplying power to the first motor and the second motor is further arranged in the shell.

[0015] In order to facilitate control, a circuit board is further arranged in the shell, and a control button and a charging interface exposed outside the shell are arranged on the circuit board. The display screen can display the real-time air pressure value of the inflating product through the electronic air pressure measuring module.

[0016] In order to accurately measure the pressure inside the inflating product, the air pump uses a motor with a centrifugal fan. You can see that when the pressure of this type of motor is 0, the air flow is very high. As the pressure increases, the air flow gradually decreases until it is 0. In the first stage of inflation, when the air flow is very high, not all the air generated by the motor can reach the inflating product because there are several tight areas between the motor and the inflating product. Therefore, only part of the air reaches the inflating product, and the extra air that cannot reach the inflating product will cause part of the pressure of the air pump to rise. Therefore, the pressure P2 read by the sensor A and the pressure P1 in the inflating product are not the same. There is a delta between the two pressure values, which decreases with the increase of the pressure until it is 0. After a certain pressure, P1 and P2 are the same. In this way, only after a certain pressure is reached can the real pressure in the inflating product be seen on the display screen. However, we want to read the actual pressure P1 all the time. In order to achieve this purpose, we simply set a formula on the PCB of the circuit board, which subtracts the delta from P2 (the pressure read by the sensor). In this way, the actual pressure P1 is displayed on the display screen. This delta is measured in our laboratory and is stable for this product, because it depends on the type of motor.

[0017] Compared with existing technologies, the advantages of this invention are as follows: The two motors, the first and second, connected in series, operate with the same air delivery direction, both facing the side outlet. The first and second motors work simultaneously. The second motor, located at the rear, draws air from the inlet and pressurizes it in the second pump chamber. The second motor is cooled as the air flows through it. The pressurized air passes through a vent, is drawn in by the first motor, and recompressed. This further pressurized air enters the inflation product through the outlet and connector for high-pressure inflation. Simultaneously, the first motor is cooled by a cooling fan. Air enters from the cooling inlet, cools the first motor, and then exits from the cooling outlet. This ensures that the air flowing out of the outlet is well cooled, and the first and second motors are less prone to overheating. The series connection of the first and second motors does not increase the airflow, but it doubles the pressure of a single motor. For example, two 130W motors (2x130) can achieve 6.5psi. Therefore, compared to a traditional 300W motor, it achieves significantly higher pressure with lower power, resulting in greater energy savings. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present utility model. Figure 1 ;

[0019] Figure 2 This is a three-dimensional structural diagram of an embodiment of the present utility model. Figure 2 ;

[0020] Figure 3 This is a cross-sectional view of an embodiment of the present utility model;

[0021] Figure 4 This is a three-dimensional schematic diagram of an embodiment of the present invention after the upper shell has been removed. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0023] like Figures 1-4 The image shown is a preferred embodiment of the present invention.

[0024] An improved high-pressure electric air pump includes a pump housing 1 with an air inlet 2a and an air outlet 2b, and a motor installed in the pump housing 1. An inflation interface 2b1 for connecting a connector is provided on the outside of the air outlet 2b. The inflation interface 2b1 can be a threaded interface or a snap-fit ​​interface.

[0025] The pump housing 1 comprises a first pump housing 11 and a second pump housing 12 which are fixedly inserted into each other. The pump housing 1 comprises a first pump cavity 1a and a second pump cavity 1b which are arranged in sequence. The pump housing 1 comprises two motors, i.e. a first motor 3a and a second motor 3b. The first motor 3a is installed in the first pump cavity 1a, and the second motor 3b is installed in the second pump cavity 1b. The first motor 3a and the second motor 3b have the same air feeding direction which is towards the air outlet 2b. The first pump cavity 1a and the second pump cavity 1b are connected by an air passage 2c. The air outlet 2b is arranged on the side of the first pump cavity 1a. The front end of the first pump cavity 1a is provided with a cooling air outlet 2d. The cooling air outlet 2d is provided with a cooling fan 8 which cools the first motor 3a. The side of the first motor 3a is provided with a cooling air inlet 2e. The air inlet 2a is arranged at the rear end of the second pump cavity 1b.

[0026] One side of the air passage 2c is provided with a one-way valve 4 which opens the air passage 2c when moving towards the air outlet 2b and closes the air passage 2c when moving towards the air passage 2c. The one-way valve 4 opens the air passage 2c when the first motor 3a and the second motor 3b work and when the product is inflated. The one-way valve 4 closes the air passage 2c when the first motor 3a and the second motor 3b stop working, so as to prevent air from flowing back from the inflated product. The one-way valve 4 in the embodiment is a one-way valve plate.

[0027] The air inlet 2a and the cooling air outlet 2d are coaxially arranged. Alternatively, the air inlet 2a and the cooling air outlet 2d can be arranged in different axes.

[0028] The outer side of the air inlet 2a is provided with a suction interface 2a1 which is connected to a connecting joint. The air inlet 2a is provided with a grille 2a2, and the suction interface 2a1 is arranged behind the grille 2a2.

[0029] The pump further comprises a housing 5 which is formed by combining an upper half housing and a lower half housing. The pump housing 1 is installed in the housing 5. The housing 5 is further provided with a power supply 6 which supplies power to the first motor 3a and the second motor 3b. The housing 5 is further provided with a circuit board 7. The circuit board 7 is provided with a control button 71, a display screen 72 and a charging interface 73 which are exposed outside the housing 5.

[0030] The operation mode of the air suction and discharge is similar to that of the existing electric air pump.

[0031] Two series of the first motor 3a and the second motor 3b work in the same direction of the air outlet 2b, the first motor 3a and the second motor 3b work at the same time, the second motor 3b absorbs air from the air inlet 2a, pressurizes the air in the second pump cavity 1b, and the second motor 3b is cooled by the air flow. The pressurized air passes through the air hole 2c, and the pressurized air is extracted by the first motor 3a and compressed again. The further pressurized air enters the inflating product through the air outlet 2b and the joint for high-pressure inflation. At the same time, the first motor 3a is cooled by the cooling fan 8, and the air enters from the cooling air inlet, cools the first motor 3a, and then is discharged from the cooling air outlet 2e. This makes the air flowing out of the air outlet 2b well cooled, and the first motor 3a and the second motor 3b are not easy to overheat. The series connection of the first motor 3a and the second motor 3b does not increase the air flow, but doubles the pressure of a single motor. For example: two 130W motors (2x130) can reach 6.5psi. Therefore, compared with the traditional 300W motor, lower power but much higher pressure, more energy-saving.

[0032] It should be noted that in the description of the present embodiment, the terms "front, rear, left, right, upper, lower" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. The terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

Claims

1. An improved high pressure electric air pump, comprising a pump housing (1) having an air inlet (2a) and an air outlet (2b), and a motor mounted in the pump housing (1), an air charging interface portion (2b1) provided on the outside of the air outlet (2b) for connecting a connecting joint; characterized in that: The pump housing (1) is provided with a first pump cavity (1a) and a second pump cavity (1b) arranged in sequence, and the motor has two, i.e. a first motor (3a) and a second motor (3b), the first motor (3a) is installed in the first pump cavity, the second motor (3b) is installed in the second pump cavity, the air feeding directions of the first motor (3a) and the second motor (3b) are the same and are both towards the air outlet (2b); the first pump cavity (1a) and the second pump cavity (1b) are provided with a vent hole (2c) for communication, the air outlet (2b) is arranged on the side of the first pump cavity (1a), the front end of the first pump cavity (1a) is provided with a cooling air outlet (2d), the cooling air outlet (2d) is provided with a cooling fan (8) for cooling the first motor (3a), the side of the first motor (3a) is provided with a cooling air inlet (2e), and the air inlet (2a) is located at the rear end of the second pump cavity (1b).

2. The improved high pressure electric air pump of claim 1, wherein: One side of the vent hole (2c) is provided with a one-way valve (4), which opens the vent hole (2c) in the direction of the air outlet (2b) and closes the vent hole (2c) in the direction of the vent hole (2c).

3. The modified high pressure electric gas pump of claim 2, wherein: The one-way valve (4) is a one-way valve plate or a valve rod held by a spring to maintain a closing tendency.

4. The modified high pressure electric gas pump of claim 1, wherein: The air inlet (2a) and the cooling air outlet (2d) are coaxially arranged.

5. The modified high pressure electric gas pump of claim 1, wherein: The outer side of the air inlet (2a) is provided with a suction interface part (2a1) for connecting a connecting joint.

6. The improved high pressure electric air pump of claim 5, wherein: The air inlet (2a) is provided with a grille (2a2), and the suction interface part (2a1) is located behind the grille (2a2).

7. The modified high pressure electric gas pump of claim 1, wherein: The pump housing (1) comprises a first pump housing (11) and a second pump housing (12), and the first pump housing (11) and the second pump housing (12) are fixed by being inserted into each other.

8. The modified high pressure electric gas pump of claim 1, wherein: Further comprising a shell (5), the pump housing (1) is installed in the shell (5), and the shell (5) is further provided with a power supply (6) for supplying power to the first motor (3a) and the second motor (3b).

9. The modified high pressure electric gas pump of claim 8, wherein: The shell (5) is further provided with a circuit board (7), and the circuit board (7) is provided with a control button (71), a display screen (72) and a charging interface (73) which are exposed outside the shell (5).

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