A multi-mode electric pump

Abstract

The application discloses a kind of electric pumps of multiple working modes, to solve the single inflation mode of air pump, different inflation requirements cannot be realized.The application includes pump body, gas outlet and air inlet are arranged on the pump body, impeller is installed in the pump body, centrifugal air passage is arranged between the outer periphery of impeller and gas outlet, and axial flow air passage is arranged along the axial direction of impeller between impeller and gas outlet;Centrifugal air passage and axial flow air passage can realize on-off control, and the switching of multiple working modes is realized by the on-off control of both. This kind of electric pump of multiple working modes can realize multiple working modes, and can meet the inflation requirements of fast large-flow inflation and high-pressure inflation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air pump, more particularly, it relates to a kind of electric pump of multiple working modes. BACKGROUND

[0002] At present, the air-filled product on market is very common, in order to facilitate the inflation operation of air-filled product, many air-filled products are matched with air pump. Common air pump has manual and electric, electric is more labor-saving and convenient than manual. When air-filled product inflates, there are different requirements in different stages, starting stage requires rapid large flow inflation, end stage requires high pressure inflation, but many electric air pumps used now have single inflation mode, cannot realize different inflation requirements. SUMMARY

[0003] In order to overcome the above-mentioned shortcomings, the present application provides a kind of electric pump of multiple working modes, it can realize multiple working modes, can meet the inflation requirements of rapid large flow inflation and high pressure inflation.

[0004] In order to solve the above technical problems, the present application adopts the following technical scheme: a kind of electric pump of multiple working modes, including pump body, the gas outlet and air inlet are arranged on the pump body, the impeller is installed in the pump body, the centrifugal air passage is arranged between the outer periphery of the impeller and the gas outlet, the axial flow air passage is arranged along the axial direction of the impeller between the impeller and the gas outlet;Centrifugal air passage and axial flow air passage can realize on-off control, and the switching of multiple working modes is realized by the on-off control of the two.

[0005] When working, the impeller rotates to generate airflow, the axial flow air passage is closed, and the airflow can flow along the centrifugal air passage alone;The centrifugal air passage is closed, and the airflow can also flow along the axial flow air passage alone;The centrifugal air passage and the axial flow air passage are opened simultaneously, and the airflow can also flow along the centrifugal air passage and the axial flow air passage simultaneously. The air pressure of the axial flow air passage alone is large, and the flow of the centrifugal air passage alone is large. The rotation of the impeller makes the airflow be thrown outwards, the inlet of the centrifugal air passage is arranged at the outer periphery of the impeller, the thrown-out airflow directly enters the centrifugal air passage, so that the centrifugal air passage can realize large flow delivery of the airflow. The airflow flowing in the axial flow air passage produces vortex in the process, and finally delivered to the gas outlet, so that the airflow realizes high pressure delivery. This electric pump of multiple working modes can realize multiple working modes, and can meet the inflation requirements of rapid large flow inflation and high pressure inflation.

[0006] As preferred, the gas outlet position is connected with the air nozzle for switching working mode.

[0007] The air nozzle is convenient for switching the working mode of air pump and connecting the pipeline of air pump and inflation product.

[0008] As preferred, the air outlet position is provided with a centrifugal air outlet groove and an axial air outlet groove, the centrifugal air outlet groove and the centrifugal air passage are communicated, and the axial air outlet groove and the axial air passage are communicated; the air nozzle is provided with a centrifugal interface and an axial interface, and the switching of the working mode is realized by the engagement and disengagement of the centrifugal interface and the centrifugal air outlet groove and the engagement and disengagement of the axial interface and the axial air outlet groove.

[0009] The electric pump is convenient to switch the working mode.

[0010] As preferred, a rotatable adjusting rotating seat is installed in the air nozzle, and the centrifugal interface and the axial interface are arranged on the adjusting rotating seat; a spiral guide groove is arranged on the outer wall of the adjusting rotating seat, a storage cavity is arranged in the air nozzle, a piston ring and a return spring are installed in the storage cavity, the return spring abuts against the piston ring, the piston ring is connected with a push rod, a guide column is arranged on the push rod, the end of the guide column is inserted into the spiral guide groove, and a drainage hole is arranged on the air nozzle and communicated with the storage cavity.

[0011] In the initial stage of the inflation of the inflatable product, the internal pressure is low, at this time, the electric pump adopts the centrifugal large-flow working mode for inflation, the centrifugal interface on the adjusting rotating seat is correspondingly communicated with the centrifugal air outlet groove, and the axial interface and the axial air outlet groove are separated. With the continuous rise of the air pressure in the inflatable product, the airflow is introduced into the storage cavity through the drainage hole, the piston ring in the storage cavity is pushed to move, so that the guide column on the push rod moves in the spiral guide groove, thereby pushing the adjusting rotating seat to rotate, in the process of the rotation of the adjusting rotating seat, the centrifugal interface slowly deviates from the centrifugal air outlet groove, and the axial interface and the axial air outlet groove slowly overlap and communicate, in this process, the working mode of the combination of the centrifugal large-flow air outlet and the axial high-pressure air outlet is realized. In the final stage of the inflation, the pressure in the inflatable product is large, at this time, the centrifugal interface completely deviates from the centrifugal air outlet groove, and the axial interface and the axial air outlet groove completely overlap and communicate, at this time, the axial high-pressure inflation working mode is realized. After the inflation is completed, the electric pump is separated from the inflatable product, and under the action of the return spring, the piston ring and the adjusting rotating seat are returned. Through the structure, the automatic switching of the working mode of the electric pump is realized, and the inflation operation is facilitated.

[0012] As preferred, a through-flow hole is arranged on the air nozzle, the drainage hole is communicated between the storage cavity and the through-flow hole, the adjusting rotating seat is installed in the through-flow hole, and a flow blocking cover is arranged at the opening position of the drainage hole on the inner wall of the through-flow hole.

[0013] The flow blocking cover can block the inflation airflow, so that the air pressure introduced by the drainage hole is more accurate.

[0014] As preferred, a boss is arranged at the air outlet position of the pump body, a positioning pin is arranged on the outer wall of the boss, one end of the air nozzle is sleeved on the boss, a clamping groove is arranged on the air nozzle in a circumferential direction, and the positioning pin is inserted into and movable along the clamping groove.

[0015] The clamping groove on the air nozzle is insertedly connected with the positioning pin on the boss to realize axial locking of the air nozzle. The positioning pin moves circumferentially between the clamping grooves during rotation of the air nozzle, and is axially positioned in the clamping groove after moving to the position, thereby ensuring reliable connection of the air nozzle.

[0016] As preferred, the side walls of the clamping groove are outwardly expanded to form positioning ends, and the end of the air nozzle is provided with an insertion slot extending to the clamping groove, the insertion slot is communicated with the clamping groove, and the insertion slot is folded at the communication end of the clamping groove to form a clamping position.

[0017] The positioning ends at both ends of the clamping groove and the clamping position between the insertion slot and the clamping groove are three working mode switching positions of the positioning pin, and when the positioning pin reaches any position, the corresponding working mode is switched to the position.

[0018] As preferred, the impeller is provided with an impeller cavity, the impeller cavity penetrates to the outer edge of the impeller, the impeller is provided with an inflow port communicated with the impeller cavity, and the side wall of the impeller cavity on the side of the inflow port is radially outwardly inclined to form a downward inclined surface in the direction close to the air outlet.

[0019] The impeller cavity and the downward inclined surface arranged on the impeller make the airflow downward, which is conducive to forming a vortex and eddy current, and realizing high-pressure airflow conveying.

[0020] As preferred, the upper edge of the impeller extends outward to form a flow blocking flange.

[0021] The flow blocking flange can prevent the airflow vortex from upwardly leaking outward under the action of pressure, and is conducive to increasing the air pressure.

[0022] As preferred, an axial flow guide disc is installed in the axial flow air duct close to the impeller, a plurality of guide air ducts are arranged at the edge of the axial flow guide disc at intervals, and the guide air ducts are arranged along the circumferential direction and inclined to the direction close to the air outlet.

[0023] The guide air ducts on the axial flow guide disc have a good flow guiding effect, which is conducive to forming a high-pressure vortex of the airflow.

[0024] Compared with the prior art, the air pump structure of the patent can realize multiple working modes and meet the inflation requirements of rapid large-flow inflation and high-pressure inflation; and the electric pump working mode can be automatically switched, thereby facilitating inflation operation. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a sectional view of embodiment 1 of the present application;

[0026] Figure 2 is a schematic diagram of airflow flow of the present application without installation of an air nozzle;

[0027] Figure 3 is a schematic diagram of airflow flow of the present application in a working mode combining axial flow and centrifugal flow;

[0028] Figure 4 is the schematic diagram of air flow in axial working mode of the present application;

[0029] Figure 5 is the schematic diagram of air flow in centrifugal working mode of the present application;

[0030] Figure 6 is the schematic diagram of the structure of the bottom of the pump body of the present application;

[0031] Figure 7 is the schematic diagram of the structure of the air nozzle of the present application;

[0032] Figure 8 is the schematic diagram of the internal structure of the air nozzle of the present application;

[0033] Figure 9 is the sectional view of embodiment 2 of the present application;

[0034] Figure 10 is the schematic diagram of the partial structure of the position of the air nozzle of the present application; Figure 9

[0035] In the figure: 1, pump body; 2, air outlet; 3, air inlet; 4, impeller; 5, centrifugal air channel; 6, axial air channel; 7, impeller cavity; 8, inflow port; 9, downward pressing slope; 10, blade; 11, flow blocking flange; 12, axial flow guide disc; 13, flow guide air channel; 14, notch; 15, motor; 16, air nozzle; 17, anti-skid pit; 18, boss; 19, positioning pin; 20, clamping groove; 21, positioning end; 22, insertion slot; 23, clamping position; 24, reinforcing rod; 25, clamping convex; 26, centrifugal air outlet groove; 27, axial air outlet groove; 28, centrifugal interface; 29, axial interface; 30, through-flow hole; 31, partition plate; 32, adjusting rotating seat; 33, helical guide slot; 34, pressure storage cavity; 35, piston ring; 36, return spring; 37, push rod; 38, guide column; 39, drainage hole; 40, flow blocking cover; 41, positioning ring; 42, ball; 43, confluence hole. DETAILED DESCRIPTION

[0036] The technical solutions of the present application will be further described in detail below through specific embodiments and in combination with the accompanying drawings:

[0037] Embodiment 1: a multi-mode electric pump (see attached Figure 1 to attached Figure 8 ), comprising a pump body 1, an air outlet 2 and an air inlet 3 are arranged on the pump body, the air outlet and the air inlet are arranged at two ends of the pump body respectively, an impeller 4 is installed in the pump body, a centrifugal air channel 5 is arranged between the outer periphery of the impeller and the air outlet, and an axial air channel 6 is arranged between the impeller and the air outlet along the axial direction of the impeller. Both the centrifugal air channel and the axial air channel can realize on-off control, and the switching of multiple working modes is realized through the on-off control of the two. ​

[0038] Impeller is provided with an impeller cavity 7, which penetrates to the outer edge of the impeller. The impeller is provided with an inlet 8 communicating with the impeller cavity. The inlet is arranged corresponding to the air inlet on the pump body. The side wall of the impeller cavity on the side of the inlet is inclined radially outward to the direction close to the air outlet, forming a downward inclined surface 9. A plurality of arc-shaped blades 10 are arranged in the impeller cavity. The blades are arranged along the involute path from inside to outside. The upper edge of the impeller extends outward to form a flow blocking flange 11.

[0039] A shaft flow guide disc 12 is installed in the shaft flow passage close to the impeller. A plurality of guide air passages 13 are arranged on the edge of the shaft flow guide disc. The guide air passages are arranged in the circumferential direction and inclined to the direction close to the air outlet. A notch 14 is arranged on the outer wall of the shaft flow guide disc corresponding to the guide air passage. The width of the notch gradually decreases to the direction close to the air outlet. A motor 15 is installed on the shaft flow guide disc. The output shaft of the motor is connected with the impeller. The motor is arranged in the shaft flow passage, which has good heat dissipation effect.

[0040] A plurality of centrifugal air passages are arranged on the side wall of the pump body in the circumferential direction. One end of the centrifugal air passage is open to the outer edge of the impeller. In this embodiment, two centrifugal air passages are arranged. The air outlet is arranged at the center of the end of the shaft flow passage. The centrifugal air passage has an L-shaped structure. One end of the centrifugal air passage is open to the outer edge of the impeller. The other end of the centrifugal air passage extends to the air outlet position.

[0041] The air outlet position is connected with an air nozzle 16 for switching the working mode. Anti-skid pits 17 are arranged on the outer wall of the air nozzle. The anti-skid pits play the role of anti-skid during the process of holding and rotating the air nozzle. A boss 18 is arranged on the pump body at the air outlet position. A positioning pin 19 is arranged on the outer wall of the boss. One end of the air nozzle is sleeved on the boss. A circumferentially arranged clamping groove 20 is arranged on the air nozzle. The positioning pin is inserted into the clamping groove and can move along the clamping groove. The side walls of the clamping groove at both ends are expanded outward to form a positioning end 21. An insertion slot 22 extending to the clamping groove is arranged on the end of the air nozzle. The insertion slot is in communication with the clamping groove. The insertion slot is folded at the communication end of the clamping groove to form a clamping position 23. A convex arc-shaped reinforcing rod 24 is arranged on the insertion slot position of the outer wall of the air nozzle. A clamping convex 25 is arranged on the side wall of the clamping groove at the clamping position.

[0042] A centrifugal air outlet slot 26 and a shaft flow air outlet slot 27 are arranged at the air outlet position. The centrifugal air outlet slot is in communication with the centrifugal air passage. The shaft flow air outlet slot is in communication with the shaft flow passage. A centrifugal interface 28 and a shaft flow interface 29 are arranged on the air nozzle. A through-flow hole 30 is arranged on the air nozzle. A partition plate 31 is arranged in the through-flow hole. The centrifugal interface and the shaft flow interface are arranged on the partition plate.

[0043] The centrifugal interface and the axial flow interface are both provided with two, the centrifugal interface and the axial flow interface are circumferentially staggered, the centrifugal interface is provided at the periphery of the axial flow interface, and the length of the centrifugal interface is greater than that of the axial flow interface. The centrifugal outlet groove and the axial flow outlet groove are both provided on the boss, the centrifugal outlet groove and the axial flow outlet groove are both provided with two, the centrifugal outlet groove is provided at the periphery of the axial flow outlet groove, and the length of the centrifugal outlet groove is greater than that of the axial flow outlet groove. The centrifugal interface corresponds to the centrifugal outlet groove, and the axial flow interface corresponds to the axial flow outlet groove. The switching of the working mode of the electric pump is realized by the rotation of the air nozzle to realize the engagement and disengagement of the centrifugal interface and the centrifugal outlet groove and the engagement and disengagement of the axial flow interface and the axial flow outlet groove.

[0044] The air nozzle is rotated to the centrifugal interface and the centrifugal outlet groove are communicated, and the axial flow interface and the axial flow outlet groove are separated, at this time, the centrifugal large-flow air outlet working mode is realized.

[0045] The air nozzle is rotated to the centrifugal interface and the centrifugal outlet groove are separated, and the axial flow interface and the axial flow outlet groove are communicated, at this time, the axial flow high-pressure air outlet working mode is realized.

[0046] The air nozzle is rotated to the centrifugal interface and the centrifugal outlet groove are communicated, and the axial flow interface and the axial flow outlet groove are communicated, at this time, the centrifugal large-flow air outlet and the axial flow high-pressure air outlet combined working mode is realized.

[0047] In operation, the impeller rotates to generate airflow, the axial flow air channel is closed, and the airflow can flow along the centrifugal air channel alone; the centrifugal air channel is closed, and the airflow can also flow along the axial flow air channel alone; the centrifugal air channel and the axial flow air channel are opened at the same time, and the airflow can also flow along the centrifugal air channel and the axial flow air channel at the same time. The axial flow air channel alone has large air pressure, and the centrifugal air channel alone has large flow rate. The rotation of the impeller causes the airflow to be thrown outward, the centrifugal air channel inlet is provided at the outer periphery of the impeller, the thrown airflow directly enters the centrifugal air channel, so that the centrifugal air channel can realize large-flow delivery of the airflow. The airflow thrown outward by centrifugal force generates vortex in the process of flowing in the axial flow air channel, and finally delivered to the air outlet, so that the airflow realizes high-pressure delivery. The electric pump with multiple working modes can realize multiple working modes and meet the requirements of rapid large-flow inflation and high-pressure inflation.

[0048] Embodiment 2: A multiple working mode electric pump (see attached Figure 9 , attached Figure 10), which is similar to that of Example 1, with the main difference being that in this example, a rotatable adjusting turn 32 is installed in the air nozzle, and the centrifugal interface and the axial flow interface are both arranged on the adjusting turn; a helical guide groove 33 is arranged on the outer wall of the adjusting turn, a pressure storage cavity 34 is arranged in the air nozzle, a piston ring 35 and a return spring 36 are installed in the pressure storage cavity, the return spring abuts against the piston ring, the piston ring is connected to a push rod 37, a guide column 38 is arranged on the push rod, the guide column is inserted into the helical guide groove at the end, a drainage hole 39 is arranged on the air nozzle, and the drainage hole is in communication with the pressure storage cavity. A through-flow hole is arranged on the air nozzle, the drainage hole is in communication between the pressure storage cavity and the through-flow hole, the adjusting turn is installed in the through-flow hole, and a flow blocking cover 40 is arranged on the through-flow hole at the position of the opening of the drainage hole. The drainage hole is arranged close to the opening end of the through-flow hole, and the opening end of the flow blocking cover faces the opening end of the through-flow hole. After the air nozzle is sleeved with the boss, locking and positioning are performed by means of screws. The end of the pressure storage cavity away from the piston ring is connected to a positioning ring 41, the return spring abuts against the positioning ring, the positioning ring is provided with a through hole through which the push rod passes, the end surface of the positioning ring is provided with a ball 42, and the adjusting turn is supported on the ball. The adjusting turn is provided with a converging hole 43, the converging hole is in communication with the through-flow hole, and the centrifugal interface and the axial flow interface are both in communication with the converging hole. The end surface of the adjusting turn is attached to the end surface of the boss. The other structures are the same as those of Example 1.

[0049] In the initial stage of inflation of the inflatable product, the internal pressure is low, at this time, the electric pump adopts the centrifugal large-flow working mode to inflate, the centrifugal interface on the adjusting turn is in communication with the centrifugal gas outlet groove, and the axial flow interface and the axial flow gas outlet groove are separated. As the gas pressure in the inflatable product continuously rises, the airflow is introduced into the pressure storage cavity by the drainage hole, the piston ring in the pressure storage cavity is pushed to move, thereby causing the guide column on the push rod to move in the helical guide groove, thereby pushing the adjusting turn to rotate, in the process of rotation of the adjusting turn, the centrifugal interface slowly deviates from the centrifugal gas outlet groove, and the axial flow interface and the axial flow gas outlet groove slowly overlap and communicate, in this process, the working mode of combination of the centrifugal large-flow gas outlet and the axial flow high-pressure gas outlet is realized. In the final stage of inflation, the pressure in the inflatable product is large, at this time, the centrifugal interface completely deviates from the centrifugal gas outlet groove, and the axial flow interface and the axial flow gas outlet groove completely overlap and communicate, at this time, the axial flow high-pressure inflation working mode is realized. After inflation is completed, the electric pump is separated from the inflatable product, and under the action of the return spring, the piston ring and the adjusting turn are returned. Through this structural arrangement, automatic switching of the working mode of the electric pump is realized, which facilitates inflation operation.

[0050] The above-described examples are only the preferred schemes of the present application, and do not limit the present application in any form, and other variants and modifications are possible without exceeding the technical scheme recorded in the claims.

Claims

1. A multi-mode electric pump, characterized by, The pump body is provided with an air outlet and an air inlet, and an impeller is installed in the pump body. A centrifugal air passage is arranged between the outer periphery of the impeller and the air outlet, and an axial air passage is arranged between the impeller and the air outlet along the axial direction of the impeller. The centrifugal air passage and the axial air passage can realize on-off control, and the switching of multiple working modes is realized through the on-off control of the two passages. The air outlet is connected to an air nozzle for switching the working mode. The air outlet is provided with a centrifugal air outlet groove and an axial air outlet groove, and the centrifugal air outlet groove and the centrifugal air passage are communicated, and the axial air outlet groove and the axial air passage are communicated. The air nozzle is provided with a centrifugal interface and an axial interface, and the switching of the working mode is realized through the engagement and disengagement of the centrifugal interface and the centrifugal air outlet groove and the engagement and disengagement of the axial interface and the axial air outlet groove. The impeller is provided with an impeller cavity, the impeller cavity penetrates to the outer edge of the impeller, and the impeller is provided with an inlet opening communicated with the impeller cavity. The side wall of the impeller cavity on the side of the inlet opening is inclined radially outward to form a downward inclined surface.

2. An electric pump of multiple operating modes according to claim 1, characterized in that, A rotatable adjusting seat is installed in the air nozzle, and the centrifugal interface and the axial interface are arranged on the adjusting seat. A spiral guide groove is arranged on the outer wall of the adjusting seat. An accumulator cavity is arranged in the air nozzle, and a piston ring and a return spring are installed in the accumulator cavity. The return spring abuts against the piston ring. The piston ring is connected to a push rod, and a guide column is arranged on the push rod. The end of the guide column is inserted into the spiral guide groove. A drainage hole is arranged on the air nozzle, and the drainage hole is communicated with the accumulator cavity.

3. An electric pump of multiple operating modes according to claim 2, characterized in that, A through hole is arranged on the air nozzle, the drainage hole is communicated between the accumulator cavity and the through hole, and the adjusting seat is installed in the through hole. A flow blocking cover is arranged on the through hole at the opening position of the drainage hole.

4. The electric pump of claim 1, wherein, A boss is arranged on the pump body at the position of the air outlet. A positioning pin is arranged on the outer wall of the boss. One end of the air nozzle is sleeved on the boss. The air nozzle is provided with circumferentially arranged clamping grooves. The positioning pin is inserted into the clamping grooves and can move along the clamping grooves.

5. An electric pump of multiple operating modes according to claim 4, characterized in that, The side walls of the two ends of the clamping groove are expanded to form positioning ends. The end of the air nozzle is provided with a slot extending to the clamping groove. The slot is communicated with the clamping groove, and the slot is folded at the communicated end of the clamping groove to form a clamping position.

6. The electric pump of claim 1, wherein, Anti-skid pits are arranged on the outer wall of the air nozzle.

7. The electric pump of claim 1, wherein, The upper edge of the impeller is extended outward to form a flow blocking flange.

8. An electric pump of a plurality of operating modes according to any one of claims 1 to 6, characterized in that, An axial flow guide disc is installed in the axial air passage close to the impeller. A plurality of guide air passages are arranged at intervals on the edge of the axial flow guide disc and are inclined toward the air outlet along the circumferential direction.

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