High-pressure electric air pump

Abstract

The utility model discloses a high-pressure electric air pump which comprises a pump shell and a motor installed in the pump shell, an air outlet is formed in the front end of the pump shell, an air inflation connector part used for being connected with a connector is arranged on the outer side of the air outlet, and an air inlet is formed in the rear end of the pump shell. A plurality of pump cavities which are arranged in sequence are formed in the pump shell, the pump cavity at the foremost end is arranged adjacent to the air outlet, the pump cavity at the rearmost end is arranged adjacent to the air inlet, and a vent hole is formed between the heads and the tails of every two adjacent pump cavities for communication; the multiple motors are arranged, one motor is arranged in each pump cavity, and the air supply directions of all the motors are the same and all face the air outlet direction. The high-pressure electric air pump is reasonable in structure, and the purpose of high-pressure air inflation can be achieved through the low-power motor.

Description

TECHNICAL FIELD

[0001] The utility model relates to a 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 among consumers due to their convenient carrying and easy storage. Some outdoor sports enthusiasts like to use inflatable products such as paddle boards, 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, and is discharged from 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 scenes do not require air flow, but only require high pressure. The foregoing solution is not feasible. For example, a 300W motor can reach 4psi. This type of motor has high power, and the high-power motor has 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: a too large and heavy battery cannot be used.

[0005] Therefore, the current high-pressure electric air pump needs to be further improved to provide a high-air-pressure but low-power solution. SUMMARY

[0006] The utility model solves the technical problem of providing a high-pressure electric air pump with a reasonable structure and a low-power motor to achieve high-pressure inflation.

[0007] The utility model discloses a technical scheme that solves the above technical problem, which is a high-pressure electric air pump, comprising a pump shell and a motor installed in the pump shell, a gas outlet is arranged at the front end of the pump shell, a gas filling interface part for connecting a connecting joint is arranged at the outer side of the gas outlet, and a gas inlet is arranged at the rear end of the pump shell; the pump shell has a plurality of pump cavities arranged in sequence, the pump cavity at the foremost end is arranged adjacent to the gas outlet, the pump cavity at the rearmost end is arranged adjacent to the gas inlet, and a vent hole is arranged between the head and tail of the two adjacent pump cavities; the motor has a plurality of motors, one motor is arranged in each pump cavity, and the air supply directions of the motors are the same and all face the gas outlet.

[0008] When the air-filled product reaches the maximum pressure, if the customer does not stop the air pump in time and the air pump continues to work, the motor of the air pump will heat up, causing the thermal fuse in the motor to start, and the motor will stop working. Since the joint end of the air pump is still connected to the air-filled product, the air valve of the air-filled product is in an open state, and as soon as the motor stops, the high-pressure gas in the air-filled product is discharged from the air filling port through the air inlet end of the air pump, and the air-filled product will fall down due to lack of air. To avoid this situation, the following three ways of setting a one-way valve can be used to solve the problem.

[0009] Method 1: One side of the vent hole is provided with a one-way valve, which opens the vent hole in the direction of the gas outlet and closes the vent hole in the direction of the vent hole.

[0010] Method 2: The inner side of the gas inlet is provided with a one-way valve, which opens the gas inlet in the direction of the gas outlet and closes the gas inlet in the direction of the gas inlet.

[0011] Method 3: The outer side of the gas outlet is provided with a one-way valve, which opens the gas outlet in the direction away from the gas outlet and closes the gas outlet in the direction of the gas outlet.

[0012] When the motor stops and the air-filled product is still connected to the air pump, the air pressure in the air-filled product will act on the one-way valve, causing the one-way valve to move and close the vent hole or the gas inlet or the gas outlet, so that the air in the air-filled product will not be discharged, thereby achieving the effect of air leakage protection. During normal air filling, the airflow generated by the motor will cause the one-way valve to open, and the high-pressure airflow can normally pass through the gas outlet to fill the air-filled product. The preferred way of setting the one-way valve is method 1, method 2 will cause both motors to be in the air pressure, and method 3 is theoretically the best, but it will increase the volume of the product.

[0013] As a preferred, the one-way valve is a one-way valve piece, and the one-way valve can also be a valve rod held by a spring to maintain a closing tendency.

[0014] For the convenience of the electric air pump to inflate products quickly, the air inlet is provided with an air extraction interface part connected with the connecting joint. When air extraction, the inflating products are connected with the air extraction interface part through the connecting joint, and the motor works, so that the gas in the inflating products can be extracted more efficiently and quickly.

[0015] Further improvement, the air outlet is provided with a first grid, and the inflating interface part is located in front of the first grid; the setting of the first grid ensures the inflation and prevents larger sundries from entering the motor and prevents fingers from entering the motor, thereby improving the safety. The air inlet is provided with a second grid, and the air extraction interface part is located behind the second grid. The setting of the second grid ensures the air inlet and prevents larger sundries from entering the motor and prevents fingers from entering the motor, thereby improving the safety.

[0016] As preferred, the pump cavity has two, which are a first pump cavity and a second pump cavity, and a ventilation hole is arranged between the first pump cavity and the second pump cavity for communication, the air outlet is arranged at the front end of the first pump cavity, and the air inlet is arranged at the rear end of the second pump cavity; the motor has two, which are a first motor and a second motor, the first motor is installed in the first pump cavity, and the second motor is installed in the second pump cavity. Of course, three or four pump cavities can be arranged according to the needs, and three or four corresponding motors are arranged.

[0017] As an improvement, the pump shell comprises a first pump shell and a second pump shell, and the first pump shell and the second pump shell are inserted and fixed with each other. The first pump shell and the second pump shell are inserted and arranged with each other and are constrained with each other, so that the connection of the first pump shell and the second pump shell is more stable.

[0018] As preferred, the air inlet and the air outlet are coaxially arranged. The charging and discharging path is shorter and has high efficiency.

[0019] Compared with the prior art, the utility model has the advantages that a plurality of motors in series are arranged in the pump shell, the air supply directions of the motors are the same and are all towards the air outlet direction when the motors work, the plurality of motors work at the same time, the rear motor pressurizes the air into the adjacent front pump cavity, the motor in the pump cavity further pressurizes the air and pumps out from the air outlet, and the inflating products connected with the air outlet are inflated at high pressure. For example, a 130W small power motor and a 300W large power motor are used. The large power motor can reach 4.2psi air pressure, but the total power of the two small power motors in series is 260W, which is much lower than 300W, but can reach 6.6psi. The small power motor has low price and is not easy to be damaged, and only one small power motor needs to be replaced when one small power motor is damaged. The large power motor has higher replacement cost when one large power motor is damaged. The important thing is that the total power is lower, but the pressure is higher, so the utility model is more energy-saving. BRIEF DESCRIPTION OF DRAWINGS

[0020] Fig. 1Front three-dimensional structure schematic view of the embodiment of the utility model;

[0021] Fig. 2 Back three-dimensional structure schematic view of the embodiment of the utility model;

[0022] Fig. 3 Sectional view of the embodiment of the utility model. Specific implementation

[0023] The utility model will be further described in detail in combination with the drawings.

[0024] As Figs. 1-3 shown, it is a preferred embodiment of the utility model.

[0025] A high pressure electric air pump, comprising a pump shell 1 and a motor installed in the pump shell 1, the motor is a small power motor with a fan blade, the front end of the pump shell 1 is provided with an air outlet 2a, the outer side of the air outlet 2a is provided with a gas filling interface part 3a for connecting a connecting joint, the gas filling interface part 3a can be in the form of a drawing, such as threaded connection and various ways.The rear end of the pump shell 1 is provided with an air inlet 2b, the air inlet 2b and the air outlet 2a are coaxially arranged.The outer side of the air inlet 2b is provided with a gas extraction interface part 3b for connecting a connecting joint.The air outlet 2a is provided with a first grid 4a, and the gas filling interface part 3a is located in front of the first grid 4a.The air inlet 2b is provided with a second grid 4b, and the gas extraction interface part 3b is located behind the second grid 4b.

[0026] The pump shell 1 has two pump cavities arranged in front and back, respectively, a first pump cavity 5a located at the front end and a second pump cavity 5b located at the rear end, the first pump cavity 5a and the second pump cavity 5b are communicated through a ventilation hole 6, the air outlet 2a is located at the front end of the first pump cavity 5a, and the air inlet 2b is located at the rear end of the second pump cavity 5b;The pump shell 1 comprises a first pump shell 1a and a second pump shell 1b, the rear end of the first pump shell 1a and the front end of the second pump shell 1b are inserted and fixed with each other, and a rotation-stopping rib and groove insertion and fitting structure is further arranged between the first pump shell 1a and the second pump shell 1b, wherein the first pump cavity 5a is arranged in the first pump shell 1a, and the second pump cavity 5b is arranged in the second pump shell 1b.The first pump shell 1a and the second pump shell 1b are both formed by the left and right two half shells.

[0027] The motor has two, respectively first motor 7a and second motor 7b, first motor 7a is installed in first pump cavity 5a, second motor 7b is installed in second pump cavity 5b, the air supply direction of first motor 7a and second motor 7b is same and all towards the direction of air outlet 2a, that is, the direction of conveying airflow of first motor 7a and second motor 7b when working all towards air outlet 2a.

[0028] One side of the vent hole 6 is provided with a one-way valve 8, which opens the vent hole 6 when the product is being inflated and closes the vent hole 6 when the motor stops working to prevent air from flowing back from the inflated product end. The one-way valve 8 in this embodiment is a one-way valve flap.

[0029] The operation mode of air suction and exhaust is similar to that of the existing electric air pump. The two first motor 7a and second motor 7b in series have the same air supply direction, which is towards the air outlet 2a. The first motor 7a and the second motor 7b work at the same time, and the second motor 7b behind absorbs air from the air inlet 2b and pressurizes it in the second pump cavity 5b. The pressurized air opens the one-way valve flap 8 through the vent hole 6. This pressurized air is extracted by the first motor 7a and compressed again, and is sent into the first pump cavity 5a. The further pressurized air enters the inflated product through the air outlet 2a and the joint for high-pressure inflation. The series connection of the first motor 7a and the second motor 7b 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 is achieved.

[0030] 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", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or 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. A high-pressure electric air pump, comprising a pump housing and a motor installed inside the pump housing, wherein the front end of the pump housing is provided with an air outlet, the outer side of the air outlet is provided with an inflation interface for connection of a connector, and the rear end of the pump housing is provided with an air inlet; characterized in that: The pump casing has multiple pump chambers arranged in sequence. The frontmost pump chamber is located near the air outlet, and the rearmost pump chamber is located near the air inlet. A vent hole connects the front and rear ends of two adjacent pump chambers. There are multiple motors, and each pump chamber has one motor. The air delivery direction of each motor is the same, all facing the air outlet.

2. The high-pressure electric air pump according to claim 1, characterized in that: A one-way valve is provided on one side of the vent. The one-way valve opens the vent when it moves toward the air outlet and closes the vent when it moves toward the air outlet.

3. The high-pressure electric air pump according to claim 1, characterized in that: The air inlet is equipped with a one-way valve. The one-way valve opens the air inlet when it moves towards the air outlet and closes the air inlet when it moves towards the air inlet.

4. The high-pressure electric air pump according to claim 1, characterized in that: A one-way valve is provided on the outside of the air outlet. Moving away from the air outlet opens the air outlet, while moving towards the air outlet closes the air outlet.

5. The high-pressure electric air pump according to any one of claims 2 to 4, characterized in that: The one-way valve is a one-way valve plate or a valve stem that is held in a closed position by a spring.

6. The high-pressure electric air pump according to claim 1, characterized in that: The outer side of the air inlet is provided with an air extraction interface for connecting the connector.

7. The high-pressure electric air pump according to claim 6, characterized in that: The air outlet is provided with a first grille, and the air inlet is located in front of the first grille; the air inlet is provided with a second grille, and the air extraction inlet is located behind the second grille.

8. The high-pressure electric air pump according to claim 1, characterized in that: The pump chamber has two parts, namely a first pump chamber and a second pump chamber, which are connected by a vent hole. The air outlet is located at the front end of the first pump chamber and the air inlet is located at the rear end of the second pump chamber. The motor has two parts, namely a first motor and a second motor. The first motor is installed in the first pump chamber and the second motor is installed in the second pump chamber.

9. The high-pressure electric air pump according to claim 8, characterized in that: The pump housing includes a first pump housing and a second pump housing, which are inserted and fixed to each other.

10. The high-pressure electric air pump according to claim 8, characterized in that: The air inlet and air outlet are arranged coaxially.

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