Inflation and deflation pump with variable channel

Abstract

The utility model aims to provide a variable channel air inflation and deflation pump which comprises a pump shell, an air blowing assembly and a reversing assembly, a first air opening, a second air opening, an air blowing cavity and a reversing chamber are formed in the pump shell, the two ends of the air blowing cavity are both communicated with the reversing chamber, the first air opening and the second air opening are both communicated with the reversing chamber, and the air blowing assembly comprises an air blowing driving piece and a fan wheel. The air blowing driving part is arranged in the air blowing cavity, the fan wheel is arranged on an output shaft of the air blowing driving part, the reversing assembly comprises a reversing driving part and a reversing block, the reversing driving part is arranged in the pump shell, and the reversing block is arranged on an output shaft of the reversing driving part and located in the reversing chamber. The reversing block is provided with a first air duct and a second air duct which are mutually independent, when the reversing driving piece is used for driving the reversing block to rotate, the first air duct is made to communicate with one of the two ends of the air blowing cavity and the first air opening, and the second air duct is made to communicate with the other end of the two ends of the air blowing cavity and the second air opening.

Description

Technical Field

[0001] The utility model relates to the technical field of air pumps, in particular to a variable-channel air charging and discharging pump. Background Art

[0002] With the development of inflatable products such as inflatable boats and inflatable beds, the demand for air pumps used to inflate inflatable products has become increasingly large.

[0003] Air pumps generally include manual and electric types. With the development of motor technology, the market share of manual air pumps has been decreasing year by year, and the demand for electric air pumps is increasing. After the inflatable product is used, it is often necessary to release the gas so that it can be folded and stored. Therefore, in order to improve the deflation efficiency, existing air pumps usually have the function of air charging and discharging. For example, by manually turning the direction of the pump core or manually rotating the pump core to change the positions of the air outlet, air inlet of the pump core and the air inlet hole between the housing, the air pump can be changed to the inflation state or the deflation state.

[0004] However, this manually adjusted air pump is too inconvenient in actual use. Since an anti-fooling structure is often provided between the pump core and the housing, the correct posture of the pump core during the insertion process can ensure that the pump core is smoothly inserted into the housing. Therefore, in order to make the air charging and discharging pump convenient for users to use, the variable-channel air charging and discharging pump of the present application is proposed. Summary of the Utility Model

[0005] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a variable-channel air charging and discharging pump that can change the gas flow direction without adjusting the pump core, thereby realizing inflation or deflation.

[0006] The purpose of the utility model is achieved by the following technical solutions:

[0007] A variable-channel air charging and discharging pump, comprising:

[0008] A pump housing, in which a first air port, a second air port, a blower cavity and a commutation chamber are opened. Both ends of the blower cavity are communicated with the commutation chamber. The first air port and the second air port are both communicated with the commutation chamber, and the first air port and the second air port both extend to the outer side wall of the pump housing;

[0009] A blower assembly, which includes a blower driving member and a fan wheel. The blower driving member is arranged in the blower cavity, the fan wheel is arranged on the output shaft of the blower driving member, and the blower driving member is used to drive the fan wheel to rotate so that gas flows from one end of the blower cavity to the other end; and

[0010] Reversing assembly, the reversing assembly includes a reversing driving member and a reversing block. The reversing driving member is arranged inside the pump housing. The reversing block is arranged on the output shaft of the reversing driving member, and the reversing block is located inside the reversing chamber. The reversing block is provided with an independent first air duct and a second air duct. When the reversing driving member drives the reversing block to rotate, the first air duct is communicated with one end of the two ends of the air blowing chamber and the first air outlet respectively, and the second air duct is communicated with the other end of the two ends of the air blowing chamber and the second air outlet respectively.

[0011] Optionally, the variable channel air charging and discharging pump further includes a sealing assembly. The sealing assembly includes a bracket, a guide post, a valve seat, a spring and a top block. The bracket is arranged on the inner side wall of the second air outlet. One end of the guide post is arranged on one side surface of the valve seat. The guide post penetrates through the bracket. The spring is sleeved on the guide post. The spring abuts against the guide post and the bracket respectively. The spring is used to push the valve seat to abut against the side of the second air outlet away from the reversing chamber. The top block is arranged on the inner side wall of the second air duct. When the reversing block rotates, the top block pushes the guide post, so that the valve seat moves away from the second air outlet.

[0012] Optionally, the top block is provided with an avoidance groove. When the reversing block rotates to align the avoidance groove with the guide post, the inner side wall of the avoidance groove is separated from the guide post.

[0013] Optionally, the pump housing includes a pump base, an embedded seat and a panel. The embedded seat is arranged inside the pump base, so that the embedded seat and the pump base jointly enclose the air blowing chamber. The reversing chamber is located inside the embedded seat. The panel is arranged on the top of the pump base. The first air outlet is located on the panel. The second air outlet is located on one side wall of the pump base.

[0014] Optionally, the air blowing chamber includes a first chamber and a second chamber which are communicated with each other. The first chamber and the second chamber are both communicated with the reversing chamber. The air blowing driving member is located inside the first chamber. The fan wheel is located inside the second chamber.

[0015] Optionally, the embedded seat includes a motor seat and a cover plate. The first chamber is located inside the motor seat. An air groove is opened at the top of the motor seat. The cover plate is buckled on the motor seat, so that the cover plate and the inner side wall of the air groove jointly enclose the second chamber.

[0016] Optionally, the cover plate is provided with ventilation holes. When the cover plate is buckled on the motor seat, the inner side wall of the ventilation holes and the opening edge of the reversing chamber jointly clamp the reversing block.

[0017] Optionally, a circuit board is disposed between the cover plate and the panel, and both the air blowing driving member and the commutation driving member are electrically connected to the circuit board.

[0018] Optionally, a convex edge is provided on the commutation block, and an air blowing switch is provided on the circuit board. When the commutation block rotates, the convex edge presses the air blowing switch.

[0019] Optionally, an avoidance groove is formed in the middle of the convex edge. When the commutation block rotates to align the avoidance groove with the air blowing switch, the air blowing switch is separated from the inner side wall of the avoidance groove.

[0020] Compared with the prior art, the present utility model has at least the following advantages:

[0021] The variable-channel air charging and discharging pump of the present utility model includes a pump housing, an air blowing assembly and a commutation assembly. A first air port, a second air port, an air blowing cavity and a commutation chamber are formed in the pump housing. Both ends of the air blowing cavity are communicated with the commutation chamber, and both the first air port and the second air port are communicated with the commutation chamber, and both the first air port and the second air port extend to the outer side wall of the pump housing. The air blowing assembly includes an air blowing driving member and a fan wheel. The air blowing driving member is disposed in the air blowing cavity, and the fan wheel is disposed on the output shaft of the air blowing driving member. The air blowing driving member is used to drive the fan wheel to rotate so that gas flows from one end of the air blowing cavity to the other end. The commutation assembly includes a commutation driving member and a commutation block. The commutation driving member is disposed in the pump housing, and the commutation block is disposed on the output shaft of the commutation driving member, and the commutation block is located in the commutation chamber. The commutation block is provided with an independent first air duct and a second air duct. When the commutation driving member drives the commutation block to rotate, the first air duct is respectively communicated with one end of both ends of the air blowing cavity and the first air port, and the second air duct is respectively communicated with the other end of both ends of the air blowing cavity and the second air port. Thus, the channel transformation is realized by driving the commutation block by the commutation driving member, so that the air pump can be switched between the inflation state and the air extraction state, and it can be inflated and deflated. Compared with the existing scheme that requires manual change of the pump core, it is more convenient to use. Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0023] Figure 1 It is a schematic structural diagram of a variable-channel air charging and discharging pump according to an embodiment of the present utility model;

[0024] Figure 2 For Figure 1Top view of the variable-channel inflatable and deflatable pump shown;

[0025] Figure 3 is Figure 2 Schematic cross-sectional structure diagram of the variable-channel inflatable and deflatable pump shown when in the inflation state, cut along A1 - A2;

[0026] Figure 4 is Figure 2 Schematic cross-sectional structure diagram of the variable-channel inflatable and deflatable pump shown when in the inflation state, cut along B1 - B2;

[0027] Figure 5 is Figure 2 Schematic cross-sectional structure diagram of the variable-channel inflatable and deflatable pump shown when in the air extraction state, cut along A1 - A2;

[0028] Figure 6 is Figure 2 Schematic cross-sectional structure diagram of the variable-channel inflatable and deflatable pump shown when in the air extraction state, cut along B1 - B2;

[0029] Figure 7 Schematic structure diagram of the commutation block of an embodiment of the present utility model;

[0030] Figure 8 is Figure 1 Partial structure schematic diagram of the variable-channel inflatable and deflatable pump shown;

[0031] Figure 9 is Figure 1 Schematic cross-sectional diagram of a partial structure of the variable-channel inflatable and deflatable pump shown;

[0032] Figure 10 Schematic structure diagram of the embedding seat of an embodiment of the present utility model;

[0033] Figure 11 is Figure 1 Partial structure schematic diagram of the variable-channel inflatable and deflatable pump shown when in the air extraction state;

[0034] Figure 12 is Figure 1 Partial structure schematic diagram of the variable-channel inflatable and deflatable pump shown when in the inflation state;

[0035] Figure 13 is Figure 1 Partial structure schematic diagram of the variable-channel inflatable and deflatable pump shown from another angle;

[0036] Figure 14 Schematic structure diagram of the pump base of an embodiment of the present utility model.

[0037] Explanation of reference numerals:

[0038] 10. Variable-channel air charging and discharging pump; 100. Pump housing; 200. Blowing assembly; 300. Commutating assembly; 131. First air outlet; 111. Second air outlet; 121. Blowing chamber; 122. Commutating chamber; 210. Blowing driving member; 220. Fan wheel; 310. Commutating driving member; 320. Commutating block; 321. First air duct; 322. Second air duct; 400. Sealing assembly; 410. Bracket; 420. Guide post; 430. Valve seat; 440. Spring; 450. Top block; 451. Relief groove; 110. Pump base; 120. Embedded seat; 130. Panel; 1211. First chamber; 1212. Second chamber; 123. Motor seat; 124. Cover plate; 1231. Air groove; 1241. Ventilation hole; 510. Circuit board; 330. Flange; 520. Blowing switch; 331. Avoidance groove; 340. Positioning post; 530. Positioning switch; 140. PVC coating; 112. Wire bin; 113. Blowing bin; 150. Bin cover. Detailed implementation manners

[0039] To facilitate the understanding of the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings. The preferred embodiments of the present utility model are shown in the drawings.

[0040] As Figures 1 to 7 shown, a variable-channel air charging and discharging pump 10 includes a pump housing 100, a blowing assembly 200 and a commutating assembly 300. A first air outlet 131, a second air outlet 111, a blowing chamber 121 and a commutating chamber 122 are formed in the pump housing 100. Both ends of the blowing chamber 121 communicate with the commutating chamber 122. The first air outlet 131 and the second air outlet 111 both communicate with the commutating chamber 122, and the first air outlet 131 and the second air outlet 111 both extend to the outer side wall of the pump housing 100. The blowing assembly 200 includes a blowing driving member 210 and a fan wheel 220. The blowing driving member 210 is disposed in the blowing chamber 121, and the fan wheel 220 is disposed on the output shaft of the blowing driving member 210. The blowing driving member 210 is used to drive the fan wheel 220 to rotate so that gas flows from one end of the blowing chamber 121 to the other end. The commutating assembly 300 includes a commutating driving member 310 and a commutating block 320. The commutating driving member 310 is disposed in the pump housing 100, and the commutating block 320 is disposed on the output shaft of the commutating driving member 310, and the commutating block 320 is located in the commutating chamber 122. The commutating block 320 is provided with independent first air duct 321 and second air duct 322. When the commutating driving member 310 is used to drive the commutating block 320 to rotate, the first air duct 321 communicates with one end of both ends of the blowing chamber 121 and the first air outlet 131 respectively, and the second air duct 322 communicates with the other end of both ends of the blowing chamber 121 and the second air outlet 111 respectively.

[0041] It should be noted that, for example, the first air inlet 131 is located at the top of the pump housing 100, the second air inlet 111 is located on one side wall of the pump housing 100, and both the air blowing cavity 121 and the commutation chamber 122 are located inside the pump housing 100. Among them, the air blowing cavity 121 is an air blowing channel, and both ends of the air blowing cavity 121 are communicated with the commutation chamber 122. The first air inlet 131 and the second air inlet 111 are also both communicated with the commutation chamber 122. The air blowing driving member 210 is installed inside the air blowing cavity 121, and the fan wheel 220 is installed on the output shaft of the air blowing driving member 210. For example, the air blowing driving member 210 is a motor, and the fan wheel 220 is driven by the motor to continuously rotate, so that the gas can flow from one end to the other end inside the air blowing cavity 121. The commutation driving member 310 is installed inside the air blowing cavity 121. For example, the commutation driving member 310 is also a motor. The commutation block 320 is rotatably installed inside the commutation chamber 122, and the commutation block 320 is connected to the output shaft of the commutation driving member 310. In this way, the commutation driving member 310 drives the commutation block 320 to rotate clockwise or counterclockwise. The first air duct 321 and the second air duct 322 are formed on the commutation block 320. In this way, as the commutation block 320 rotates, the air pump can be in three states, namely the stop state, the inflation state, and the air extraction state. In the stop state, the air blowing driving member 210 is in the stop state, and the air pump neither inflates nor extracts air. To facilitate the description of the inflation state and the air extraction state of the air pump, the first air inlet 131 is set as the opening for communicating with the outside, and the second air inlet 111 is set as the opening for communicating with the inside of the inflatable product. Moreover, one end of the air blowing cavity 121 is defined as the a end, and the other end of the air blowing cavity 121 is defined as the b end. When the air blowing driving member 210 is started, the gas flowing from one end to the other end inside the air blowing cavity 121 is defined as the gas flowing from the a end to the b end inside the air blowing cavity 121. When the first air duct 321 is respectively communicated with the a end of the air blowing cavity 121 and the first air inlet 131, and the second air duct 322 is respectively communicated with the b end of the air blowing cavity 121 and the second air inlet 111, at this time, the gas flow direction is: the first air inlet 131, the first air duct 321, the a end of the air blowing cavity 121, the b end of the air blowing cavity 121, the second air duct 322, the second air inlet 111, that is, the gas enters the air pump from the first air inlet 131 and then flows out of the air pump from the second air inlet 111. In this way, the above gas flow process is the inflation state of the air pump. When the first air duct 321 is respectively communicated with the b end of the air blowing cavity 121 and the first air inlet 131, and the second air duct 322 is respectively communicated with the a end of the air blowing cavity 121 and the second air inlet 111. At this time, the gas flow direction is: the second air inlet 111, the second air duct 322, the a end of the air blowing cavity 121, the b end of the air blowing cavity 121, the first air duct 321, the first air inlet 131, that is, the gas enters the air pump from the second air inlet 111 and then flows out of the air pump from the first air inlet 131. In this way, the above gas flow process is the air extraction state of the air pump.In this way, the commutation driving member 310 drives the commutation block 320 to achieve channel transformation, so that the air pump can be transformed between the inflation state and the air extraction state, enabling it to achieve inflation and deflation.

[0042] As Figure 4 and Figure 7 shown, in one embodiment, the variable-channel inflation and deflation air pump 10 further includes a sealing assembly 400. The sealing assembly 400 includes a bracket 410, a guide post 420, a valve seat 430, a spring 440, and a top block 450. The bracket 410 is disposed on the inner side wall of the second air outlet 111. One end of the guide post 420 is disposed on one side surface of the valve seat 430. The guide post 420 passes through the bracket 410. The spring 440 is sleeved on the guide post 420. The spring 440 abuts against the guide post 420 and the bracket 410 respectively. The spring 440 is used to push the valve seat 430 to abut against the side of the second air outlet 111 away from the commutation chamber 122. The top block 450 is disposed on the inner side wall of the second air duct 322. When the commutation block 320 rotates, the top block 450 pushes the guide post 420, causing the valve seat 430 to move away from the second air outlet 111.

[0043] It should be noted that when the air pump is in the shutdown state, in order to prevent the inflation product from being connected to the air pump, the sealing assembly 400 is installed on the inner side wall of the second air outlet 111. Specifically, the bracket 410 is located on the inner side wall of the second air outlet 111. For example, the bracket 410 and the inner side wall of the second air outlet 111 are of an integrally formed structure. The guide post 420 passes through the bracket 410. The valve seat 430 is installed at one end of the guide post 420. For example, the valve seat 430 and the guide post 420 are of an integrally formed structure. The spring 440 is sleeved on the guide post 420. The spring 440 pushes the valve seat 430 and the bracket 410 respectively. Under the elastic thrust of the spring 440, the valve seat 430 reliably abuts against the outer position of the second air outlet 111. The top block 450 is installed on the inner side wall of the second air duct 322. In this way, when the commutation block 320 rotates, the top block 450 can push the guide post 420, so that the valve seat 430 moves away from the second air outlet 111, enabling the air pump to inflate and extract air from the inflation product smoothly.

[0044] As Figure 7 shown, in one embodiment, the top block 450 is provided with an avoidance groove 451. When the commutation block 320 rotates to align the avoidance groove 451 with the guide post 420, the inner side wall of the avoidance groove 451 is disengaged from the guide post 420.

[0045] It should be noted that in the shutdown state, in order to ensure that the valve seat 430 is closely attached to the second air outlet 111, the avoidance groove 451 is provided on the top block 450. In the shutdown state, the commutation block 320 rotates to align the avoidance groove 451 with the guide post 420, so that the top block 450 no longer pushes the guide post 420.

[0046] As Figure 1 、 Figure 3 and 8 shown, in one embodiment, the pump housing 100 includes a pump base 110, an embedded seat 120, and a panel 130. The embedded seat 120 is disposed within the pump base 110 such that the embedded seat 120 and the pump base 110 together define a blower cavity 121. A commutation chamber 122 is located within the embedded seat 120. The panel 130 is disposed on the top of the pump base 110. A first air outlet 131 is located on the panel 130, and a second air outlet 111 is located on a side wall of the pump base 110.

[0047] It should be noted that the embedded seat 120 is installed within the pump base 110 by fasteners, such that the embedded seat 120 and the inner bottom wall of the pump base 110 form the blower cavity 121, and the commutation chamber 122 is in communication with the blower cavity 121.

[0048] As Figure 9 shown, in one embodiment, the blower cavity 121 includes a first chamber 1211 and a second chamber 1212 that are in communication with each other. Both the first chamber 1211 and the second chamber 1212 are in communication with the commutation chamber 122. A blower driving member 210 is located within the first chamber 1211, and a fan wheel 220 is located within the second chamber 1212.

[0049] It should be noted that the blower driving member 210 is installed within the first chamber 1211, and the fan wheel 220 is installed within the second chamber 1212. Thus, as the blower driving member 210 drives the fan wheel 220 to rotate, gas flows from the first chamber 1211 to the second chamber 1212.

[0050] As Figures 9 to 13 shown, in one embodiment, the embedded seat 120 includes a motor seat 123 and a cover plate 124. The first chamber 1211 is located within the motor seat 123. An air groove 1231 is formed at the top of the motor seat 123. The cover plate 124 is fastened to the motor seat 123 such that the cover plate 124 and the inner side wall of the air groove 1231 together define the second chamber 1212.

[0051] It should be noted that for the convenience of installing the fan wheel 220, the embedded seat 120 is configured as a structure assembled by the motor seat 123 and the cover plate 124. An air groove 1231 is formed on the motor seat 123, and then the cover plate 124 is locked and fixed to the motor seat 123 by fasteners such that the cover plate 124 and the air groove 1231 together define the second chamber 1212, and the fan wheel 220 is installed within the second chamber 1212.

[0052] Further, as Figure 10 shown, in one embodiment, a ventilation hole 1241 is formed on the cover plate 124. When the cover plate 124 is fastened to the motor seat 123, the inner side wall of the ventilation hole 1241 and the opening edge of the commutation chamber 122 together snap-connect to a commutation block 320.

[0053] It should be noted that, in order to ensure that the commutation block 320 can rotate stably in the commutation chamber 122, a cover plate 124 is provided to hold the commutation block 320, so that the commutation block 320 will not slide out of the commutation chamber 122.

[0054] As Figure 8 shown, in one embodiment, a circuit board 510 is provided between the cover plate 124 and the panel 130, and the air blowing driving member 210 and the commutation driving member 310 are both electrically connected to the circuit board 510.

[0055] It should be noted that in this way, by controlling the air blowing driving member 210 and the commutation driving member 310 to cooperate and start through the circuit board 510, the air pump can automatically inflate and deflate. Moreover, during the inflation process, after the gas enters from the first air outlet 131, it will flow through the circuit board 510, which can blow air and dissipate heat from the components of the circuit board 510.

[0056] As Figure 7 、 Figure 8 described, in one embodiment, a convex edge 330 is provided on the commutation block 320, and a blowing switch 520 is provided on the circuit board 510. When the commutation block 320 rotates, the convex edge 330 presses the blowing switch 520.

[0057] In this way, by controlling the commutation driving member 310 to drive the commutation block 320 to rotate, after the first air duct 321 and the second air duct 322 are in appropriate positions, the convex edge 330 on the commutation block 320 will press the blowing switch 520, thereby controlling the start or stop of the air blowing driving member 210, so that the commutation driving member 310 and the air blowing driving member 210 achieve intelligent control.

[0058] As Figure 7 shown, in one embodiment, an avoidance groove 331 is formed in the middle of the convex edge 330. When the commutation block 320 rotates to align the avoidance groove 331 with the blowing switch 520, the blowing switch 520 is disengaged from the inner side wall of the avoidance groove 331.

[0059] In this way, an avoidance groove 331 is formed in the middle position of the convex edge 330. Thus, when the commutation block 320 rotates to align the avoidance groove 331 with the blowing switch 520, the convex edge 330 no longer presses the blowing switch 520, and this is the shutdown state of the air pump at this time.

[0060] As Figure 7 、 Figure 8 described, in one embodiment, a positioning post 340 is further provided on the commutation block 320, and three positioning switches 530 are further provided on the circuit board 510. The three positioning switches 530 are circumferentially distributed relative to the axis of the commutation block 320. When the commutation block 320 rotates, the positioning post 340 presses at most one positioning switch 530.

[0061] In this way, by setting three positioning switches 530, when the commutation block 320 rotates, a signal indicating whether the commutation block 320 has rotated in place can be fed back to the controller.

[0062] In one embodiment, a pneumatic sensor is also provided on the circuit board 510. In this way, the inflation pressure can be detected in real time by the pneumatic sensor. After the pressure reaches a predetermined value, when the commutation driving member 310 drives the commutation block 320 to rotate to the stop state, the air blowing driving member 210 can stop working.

[0063] As Figure 1 and Figure 2 shown, in one embodiment, a PVC coating 140 is provided at the opening position of the pump base 110. The PVC coating 140 and the pump base 110 are of an integrally formed structure. In this way, the air pump can be easily fixed to the inflatable product through the PVC coating 140.

[0064] As Figure 14 shown, in one embodiment, a wire storage chamber 112 and a blower chamber 113 are formed in the pump base 110. The wire storage chamber 112 is used for storing wires, and the embedding seat 120 is arranged in the blower chamber 113, and the panel 130 is fastened to the opening position of the blower chamber 113.

[0065] It should be noted that the wire storage chamber 112 and the blower chamber 113 are independent areas in the pump base 110. When the air pump is not in use, the wires can be stored in the wire storage chamber 112, making the air pump easy to carry.

[0066] As Figure 1 shown, in one embodiment, a cover 150 is rotatably provided at the opening position of the wire storage chamber 112. In this way, the cover 150 can shield the wire storage chamber 112, so that the wires are stably stored in the wire storage chamber 112.

[0067] The above-described embodiments only represent several embodiments of the present invention, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. The installation / fixing / setting mentioned in the present invention can be understood as including but not limited to locking and fixing using screws / screws and welding unless otherwise specifically defined. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the utility model patent shall be subject to the appended claims.

Claims

1. A variable-channel air charging and discharging pump, characterized in that Comprising: A pump housing, within which a first air inlet, a second air inlet, a blower cavity and a commutation chamber are provided. Both ends of the blower cavity communicate with the commutation chamber, and both the first air inlet and the second air inlet communicate with the commutation chamber, and both the first air inlet and the second air inlet extend to the outer side wall of the pump housing; A blower assembly, which includes a blower driving member and a fan wheel. The blower driving member is arranged within the blower cavity, the fan wheel is arranged on the output shaft of the blower driving member, and the blower driving member is used to drive the fan wheel to rotate so that gas flows from one end of the blower cavity to the other end; And A commutation assembly, which includes a commutation driving member and a commutation block. The commutation driving member is arranged within the pump housing, the commutation block is arranged on the output shaft of the commutation driving member, and the commutation block is located within the commutation chamber. The commutation block is provided with an independent first air duct and a second air duct. When the commutation driving member drives the commutation block to rotate, the first air duct communicates with one end of the two ends of the blower cavity and the first air inlet respectively, and the second air duct communicates with the other end of the two ends of the blower cavity and the second air inlet respectively.

2. The variable-channel charging and discharging pump according to claim 1, characterized in that, The variable-channel air charging and discharging pump further includes a sealing assembly, which includes a bracket, a guide post, a valve seat, a spring and a top block. The bracket is arranged on the inner side wall of the second air inlet, one end of the guide post is arranged on one side surface of the valve seat, the guide post penetrates through the bracket, the spring is sleeved on the guide post, the spring abuts against the guide post and the bracket respectively, and the spring is used to push the valve seat to abut against the side of the second air inlet away from the commutation chamber. The top block is arranged on the inner side wall of the second air duct. When the commutation block rotates, the top block pushes the guide post, so that the valve seat moves away from the second air inlet.

3. The variable-channel charging and discharging pump according to claim 2, wherein, The top block is provided with an avoidance groove. When the commutation block rotates to align the avoidance groove with the guide post, the inner side wall of the avoidance groove is separated from the guide post.

4. The variable-channel air charging and discharging pump according to claim 1, wherein The pump housing includes a pump base, an embedded seat and a panel. The embedded seat is arranged within the pump base so that the embedded seat and the pump base jointly enclose the blower cavity. The commutation chamber is located within the embedded seat. The panel is arranged on the top of the pump base. The first air inlet is located on the panel, and the second air inlet is located on one side wall of the pump base.

5. The variable-channel charge and discharge air pump according to claim 4, wherein, The blower cavity includes a first chamber and a second chamber that communicate with each other. Both the first chamber and the second chamber communicate with the commutation chamber. The blower driving member is located within the first chamber, and the fan wheel is located within the second chamber.

6. The variable-channel air charging and discharging pump according to claim 5, wherein, The embedded seat includes a motor seat and a cover plate. The first chamber is located within the motor seat. An air groove is provided on the top of the motor seat. The cover plate is buckled on the motor seat so that the inner side wall of the cover plate and the inner side wall of the air groove jointly enclose the second chamber.

7. The variable-channel charging and discharging pump according to claim 6, characterized in that The cover plate is provided with ventilation holes. When the cover plate is buckled on the motor seat, the inner side wall of the ventilation holes and the opening edge of the commutation chamber jointly clamp the commutation block.

8. The variable-channel charging and discharging pump according to claim 7, wherein A circuit board is provided between the cover plate and the panel, and both the air blowing driving member and the commutation driving member are electrically connected to the circuit board.

9. The variable-channel air charging and discharging pump according to claim 8, wherein, A convex edge is provided on the commutation block, and an air blowing switch is provided on the circuit board. When the commutation block rotates, the convex edge presses the air blowing switch.

10. The variable-channel air charging and discharging pump according to claim 9, wherein, A relief groove is formed in the middle of the convex edge. When the commutation block rotates to align the relief groove with the air blowing switch, the air blowing switch is disengaged from the inner side wall of the relief groove.

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