Dual-function micro air pump with pump head and pump valve thereof

Abstract

The invention relates to the technical field of pump valves, and provides a pump head which comprises an upper cover, and the upper cover is provided with an output flow path used for communicating with a working bag cavity, an air drainage flow path, a communicating cavity and two air inlet cavities. The diaphragm seat is provided with an input flow path, a leakage stopping flow path and a valve function cavity; the dual-function valve plate is provided with a suction one-way valve plate, a discharge one-way valve plate and a valve function plate; the suction one-way valve plate enables the input flow path to be in one-way communication towards the direction of the air inlet cavity; the discharge check valve plate enables the discharge stop flow path to be in one-way communication towards the direction of the valve function cavity; and the valve function piece blocks the air leakage flow path and the communicating cavity according to the air pressure in the valve function cavity. On the basis, the pump-valve dual-function miniature air pump works stably in the air pumping and air releasing processes, so that the reliability of the pump-valve dual-function miniature air pump is improved, and the performance required by a product is met. In addition, the invention further provides the pump and valve dual-function micro air pump.

Description

Technical Field

[0001] This application relates to the field of pump valves, and in particular to a pump head and a pump valve dual-functional micro air pump. Background Art

[0002] In the application of air pumps, there is an application that requires pumping a certain air pressure into a sealed working bladder cavity to make the working bladder cavity have a certain internal pressure. After the pressure in the working bladder cavity reaches the target requirement, the air pressure in the working bladder cavity is deflated as required. For example, in the scenario of a sphygmomanometer, first, the cuff needs to be inflated. After the cuff is inflated and reaches a certain air pressure, the sphygmomanometer measures blood pressure through the cuff. When the blood pressure measurement is completed, the cuff needs to be deflated.

[0003] In the related art, in order to simplify the system configuration, reduce the volume, and lower the cost, a deflation valve is usually integrated on the air pump. Among them, the air paths are interrelated. Therefore, the valve should be closed when pumping air, and the valve should be opened when deflating. The opening and closing of the valve are realized by the opening and closing of the valve function piece on the deflation channel, that is, the opening and closing of the valve depend on the pressure difference of the gas on both sides of the valve function piece.

[0004] However, in actual applications, the reliability of the opening and closing of the valve function piece is insufficient. Sometimes, there is air leakage during the air pumping process, resulting in the loss of air flow and failure to meet the specifications. Sometimes, it is blocked by the original air flow pressure during the deflation process, and the deflation is not smooth, resulting in the deflated air flow not meeting the deflation specifications, leading to low reliability of the pump valve dual-functional micro air pump. Therefore, improvement is needed. Summary of the Invention

[0005] In order to improve the reliability of the pump valve dual-functional micro air pump, in the first aspect, this application provides a pump head.

[0006] The pump head provided by this application adopts the following technical solutions: A pump head includes an upper cover, and the upper cover is provided with an output flow path, a deflation flow path, a communication cavity, and two air inlet cavities for communicating with the working bladder cavity; the output flow path, the communication cavity, and the deflation flow path are connected in sequence; the two air inlet cavities are respectively located on opposite sides of the output flow path, and the gas in the two air inlet cavities flows into the output flow path from opposite directions; A diaphragm seat, the diaphragm seat is provided with an input flow path, a stop deflation flow path, and a valve function cavity; the input flow path is communicated with the two air inlet cavities; the stop deflation flow path is communicated with the valve function cavity; A dual-function valve disc, the dual-function valve disc is arranged between the upper cover and the diaphragm seat; the dual-function valve disc is provided with an intake check valve disc, a discharge check valve disc and a valve function disc; the intake check valve disc enables the input flow path to be unidirectionally connected toward the air inlet chamber; the discharge check valve disc enables the leakage stop flow path to be unidirectionally connected toward the valve function chamber; the valve function disc blocks the leakage flow path and the connecting chamber according to the air pressure in the valve function chamber.

[0007] By adopting the above technical solution, there are three flow paths for gas in the pump head. Two of the paths are for gas to flow from the input flow path through the suction one-way valve plate into the two air inlet chambers. The gas in the two air inlet chambers then enters the output flow path respectively and finally flows into the working bag chamber. The other path is for gas to flow from the leakage stop flow path through the discharge check valve plate into the valve function chamber, so that the valve function plate blocks the leakage flow path and the communicating chamber. Since the output flow path, the communicating chamber and the leakage flow path are connected in sequence, the leakage of gas in the pump head is doubly restricted. Even if the reliability of the opening and closing degree of the valve function plate is limited, it can avoid leakage during the pumping process as much as possible. Moreover, when the pump stops inputting gas, the gas in the working bag chamber flows back to the connecting chamber and the exhaust gas path under the action of air pressure. At this time, the valve function piece releases the blockage of the connecting chamber and the exhaust gas path under the action of air pressure, so that the output flow path, the connecting chamber and the exhaust gas path are connected, so that the gas flows from the output flow path to the exhaust gas path and is discharged to the outside, so as to realize the exhaust of the pump. Since the gas in the air inlet chamber flows to the output flow path from the opposite direction, the gas entering the output flow path is buffered, which reduces the noise during the pumping process and ensures the stability of the original air flow pressure during the exhaust process, and avoids the blockage of the exhaust gas by the original air flow pressure as much as possible, thereby improving the stability of the exhaust gas. In summary, the new air circuit designed in this way enables the pump-valve dual-function micro air pump to operate stably during the pumping and deflation processes, thereby improving the reliability of the pump-valve dual-function micro air pump and meeting the performance requirements of the product.

[0008] Preferably, the output flow path includes an output nozzle, an output flow channel and a buffer cavity, the output flow channel is located at one end of the output nozzle, the buffer cavity is located between the two air inlet cavities and is connected to the output flow channel; the upper cover is provided with a buffer flow channel, the two ends of the buffer flow channel are respectively connected to the two air inlet cavities and pass through the buffer cavity.

[0009] By adopting the above technical solution, the gases in the two air inlet cavities enter the buffer cavity from the buffer flow channel in opposite directions to achieve buffering of the gases in the two air inlet cavities. The buffered gas then flows from the output flow channel to the output nozzle, which can effectively reduce the noise generated by the friction between the gas and the output flow channel.

[0010] Preferably, the buffer cavity is provided with a partition protrusion, the partition protrusion is arranged on a side of the buffer cavity away from the output flow channel, and the partition protrusion and the output flow channel are located on the same straight line.

[0011] By adopting the above technical solution, by arranging the partition protrusion, the partition protrusion buffers and blocks part of the gas flowing from the buffer flow channel to the buffer cavity, so as to improve the buffering effect of the gas in the buffer cavity, and the gas flowing back from the working bladder cavity is blocked by the end of the partition protrusion and flows back into the communication cavity, thereby improving the air release efficiency.

[0012] Preferably, a first flow channel is arranged between the upper cover at the output flow path and the communication cavity; the first flow channel includes an air inlet section, a buffer section and an air outlet section that are sequentially communicated, and the air inlet section is communicated with the output flow path, and the air outlet section is communicated with the communication cavity; wherein, the gas in the air inlet section flows in the opposite direction to the air outlet section under the action of the buffer section.

[0013] By adopting the above technical solution, by arranging the first flow channel, the gas flowing back from the working bladder cavity enters the buffer section from the air inlet section, and under the buffering action of the buffer section, the flow rate of the gas is reduced, so that the gas enters the communication cavity stably, and the valve function piece stably releases the blockage of the communication cavity and the anti-leakage flow path, thereby improving the stability of air release.

[0014] Preferably, the air inlet section is provided with an air inlet protrusion, and an air inlet fillet is arranged at one end of the air inlet protrusion close to the output flow path.

[0015] By adopting the above technical solution, by arranging the air inlet protrusion, the air inlet area at the air inlet end of the air inlet section is reduced, and under the guidance of the air inlet fillet, the gas can enter the air inlet section more easily, and the pressure of the gas in the air inlet section is increased to ensure that the gas can flow into the buffer section.

[0016] Preferably, the buffer section is provided with a buffer protrusion, and buffer fillets are arranged at both ends of the buffer protrusion.

[0017] By adopting the above technical solution, by arranging the buffer protrusion, the gas contacts the buffer protrusion, and under the guidance of the buffer fillet, the gas is further buffered to reduce the noise during air release, and the buffer protrusion can ensure that the gas can flow stably into the air outlet section. [[ID=23]]

[0018] Preferably, the air outlet section is provided with an air outlet protrusion, air outlet fillets are arranged at both ends of the air outlet protrusion, and an included angle exists between the air outlet protrusion and one end of the buffer section away from the air inlet section, and the included angle is an obtuse angle.

[0019] By adopting the above technical solution, an air outlet protrusion is set, which makes it easier for gas to enter the connecting cavity, so as to ensure that the valve function plate can release the blockage of the connecting cavity under the action of air pressure, and there is an angle between the air outlet protrusion and the buffer section to achieve further buffering of the gas, and try to avoid excessive air pressure in the connecting cavity, which will lead to unstable deflation process.

[0020] Preferably, the air leakage flow path includes an air leakage nozzle and an air leakage cavity, the air leakage nozzle is arranged in the air leakage cavity, and a limiting protrusion is provided in the connecting cavity.

[0021] By adopting the above technical solution, by setting up the air vent nozzle and the air vent cavity, the gas passes through the air vent cavity and then enters the air vent nozzle for discharge, and the valve function piece abuts against the air vent nozzle and the limiting protrusion to achieve the blocking of the air vent flow path and the connecting cavity, and the gas can enter the connecting cavity and the air vent cavity during blocking.

[0022] Preferably, the upper cover is provided with a second flow channel between the communicating cavity and the air relief cavity, both ends of the second flow channel are provided with communicating protrusions, and both ends of the two communicating protrusions are provided with communicating fillets.

[0023] By adopting the above technical solution and providing the second flow channel, the gas can be further buffered, so that the gas can be discharged from the air release nozzle more stably.

[0024] In a second aspect, the present application provides a micro air pump with dual functions of a pump and a valve.

[0025] The present application provides a dual-function micro air pump with a pump and valve, which adopts the following technical solutions: A pump-valve dual-function micro air pump includes a pump body, a driving mechanism and the pump head described above. The pump body includes a cup capsule that is unidirectionally connected to the input flow path and the anti-leakage flow path. The driving mechanism is connected to the cup capsule to force the cup capsule to deform and drive the gas in the cup capsule into the input flow path and the anti-leakage flow path.

[0026] By adopting the above technical solution, the cup bag is forced to deform through the operation of the driving mechanism, so that the gas enters the input flow path and the anti-leakage flow path, and the gas enters the two air inlet chambers from the input flow path through the suction one-way valve plate, and the gas in the two air inlet chambers respectively enters the output flow path, and finally flows into the working bag chamber, and the gas enters the valve function chamber from the anti-leakage flow path through the discharge check valve plate, so that the valve function plate blocks the leakage flow path and the connecting chamber to realize the pumping process; when the driving mechanism stops working, the gas in the working bag chamber flows back to the connecting chamber and the leakage flow path under the action of air pressure, and at this time, the valve function plate releases the blockage of the connecting chamber and the leakage flow path under the action of air pressure, so that the output flow path, the connecting chamber and the leakage flow path are connected, so that the gas flows from the output flow to the leakage flow path and is discharged to the outside to realize the leakage function.

[0027] In summary, the present application includes at least one of the following beneficial technical effects: 1. There are three mutually independent gas paths in the pump head for the gas, each independently realizing the pump function and the valve function. On the basis of realizing the integration of the pump and valve, the gas path structure is optimized, and the working stability during the gas pumping and air release processes of the dual-function micro air pump with pump and valve is improved, so as to improve the reliability of the dual-function micro air pump with pump and valve; 2. By setting the first flow channel, the gas flowing back in the working bladder cavity enters the buffer section from the intake section, and under the buffering effect of the buffer section, the flow rate of the gas is reduced, so that the gas enters the communication cavity stably, and the valve function piece stably releases the blockage of the communication cavity and the anti-leakage flow path, thereby improving the stability of air release; 3. By setting the intake protrusion, the buffer protrusion and the outlet protrusion, it is convenient for the gas to pass through the first flow channel and realizes the buffering of the gas, thereby improving the stability of air release. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic diagram of the first perspective of the exploded structure of the pump head in the embodiment of the present application; Figure 2 is a schematic diagram of the second perspective of the exploded structure of the pump head in the embodiment of the present application; Figure 3 is a schematic diagram of the overall structure of the upper cover in the embodiment of the present application; Figure 4 is a schematic diagram of a partial structure of the upper cover in the embodiment of the present application; Figure 5 is a schematic diagram of the overall structure of the dual-function micro air pump with pump and valve in the embodiment of the present application; Figure 6 is a schematic diagram of the exploded structure of the dual-function micro air pump with pump and valve in the embodiment of the present application.

[0029] Figure 1: 1. Upper cover; 11. Output flow path; 111. Output nozzle; 112. Output flow channel; 113. Buffer chamber; 114. Blocking protrusion; 12. Degassing flow path; 121. Degassing nozzle; 122. Degassing chamber; 13. Connecting chamber; 131. Position limiting protrusion; 132. Position limiting fillet; 14. Inlet chamber; 15. Buffer flow channel; 16. First flow channel; 161. Inlet section; 162. Buffer section; 163. Outlet section; 164. Inlet protrusion; 165. Inlet fillet; 166. Buffer protrusion; 167. Buffer Fillet; 168, air outlet protrusion; 169, air outlet fillet; 17, second flow channel; 171, connecting protrusion; 172, connecting fillet; 2, diaphragm seat; 21, input flow path; 22, anti-leakage flow path; 23, valve function chamber; 24, embedded groove; 3, dual-function valve plate; 31, suction one-way valve plate; 32, discharge check valve plate; 33, valve function plate; 4, pump body; 41, diaphragm seat; 42, cup bag; 5, driving mechanism; 51, base; 52, driving motor; 53, driving assembly; 531, eccentric wheel; 532, rocker. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-6 This application is described in further detail.

[0031] The embodiment of the present application discloses a pump head.

[0032] Reference Figure 1 and Figure 2 The pump head includes an upper cover 1, a diaphragm seat 2 and a dual-function valve plate 3. The dual-function valve plate 3 is installed between the upper cover 1 and the diaphragm seat 2. Specifically, the upper cover 1 is generally in the shape of a round block. The lower side of the upper cover 1 is provided with an output flow path 11, a leakage flow path 12, a connecting cavity 13 and two air inlet cavities 14. The output flow path 11 is connected to the sealed working capsule cavity, and the leakage flow path 12 is connected to the outside of the pump head. The output flow path 11, the connecting cavity 13 and the leakage flow path 12 are connected in sequence. The two air inlet cavities 14 are both circular cavities. The two air inlet cavities 14 are respectively located on opposite sides of the output flow path 11, so that the gas in the two air inlet cavities 14 flows from opposite directions to the output flow path 11, which can effectively reduce the noise generated by the friction of the gas entering the output flow channel 112, that is, reduce the noise during the pumping process. At the same time, the output flow path 11 is located in the middle of the leakage flow path 12, the connecting cavity 13 and the two air inlet cavities 14, and the leakage flow path 12, the connecting cavity 13 and the two air inlet cavities 14 are arranged at intervals along the circumference of the upper cover 1, so that the gas flowing from the air inlet cavity 14 to the output flow path 11 and the gas flowing from the output flow path 11 to the connecting cavity 13 and the leakage flow path 12 do not interfere with each other.

[0033] The diaphragm seat 2 is also spherical and has an input flow path 21 and a leak-stop flow path 22 running through its length. The input flow path 21 communicates with the two air inlet cavities 14. In this embodiment, there are two input flow paths 21, each communicating with one of the two air inlet cavities 14 to increase the air intake of the pump head. A valve function cavity 23 is provided on the upper side of the diaphragm seat 2. The valve function cavity 23 communicates with the leak-stop flow path 22 and is arranged corresponding to the connecting cavity 13 and the leak flow path 12.

[0034] The dual-function valve disc 3 also features a generally triangular recess 24 on the upper side of the diaphragm seat 2. The dual-function valve disc 3 is nested within this recess 24 to reduce the overall volume of the pump head. The dual-function valve disc 3 is equipped with two suction check valve discs 31, a discharge check valve disc 32, and a valve function disc 33. The two suction check valve discs 31 correspond to the two input flow paths 21, respectively, and are located between the input flow paths and the intake chamber 14. The suction check valve discs 31 exhibit a certain degree of elasticity, allowing them to deform upward under the action of gas, allowing one-way communication between the input flow paths and the intake chamber 14. Similarly, the discharge check valve disc 32 is located between the leakage control flow path 22 and the valve function chamber 23, allowing one-way communication between the leakage control flow path 22 and the valve function chamber 23. The valve function plate 33 is an elastic disc and is located between the valve function chamber 23, the connecting chamber 13 and the leakage flow path 12. When the gas enters the valve function chamber 23 from the leakage stop flow path 22 through the discharge check valve plate 32, the air pressure in the valve function chamber 23 is greater, so the valve function plate 33 elastically deforms to block the output flow path 11 and the connecting chamber 13.

[0035] In actual application, there are three flow paths for gas in the pump head. Two of the paths are that the gas enters the air inlet chamber 14 from the input flow path 21 through the suction one-way valve plate 31, and the gas in the air inlet chamber 14 enters the output flow path 11 respectively, and finally flows into the working bag chamber. The other path is that the gas enters the valve function chamber 23 from the leakage stop flow path 22 through the discharge check valve plate 32, so that the valve function plate 33 blocks the leakage flow path 12 and the connecting chamber 13 to limit the gas flow to the connecting chamber 13 or the leakage flow path 12, which can double limit the leakage of gas in the pump head. Even if the opening and closing reliability of the valve function plate 33 is limited, leakage during the pumping process can be avoided as much as possible.

[0036] Moreover, when the pump stops inputting gas, the gas in the working bladder cavity flows back to the communication cavity 13 and the air discharge passage 12 under the action of air pressure. The air pressure in the communication cavity 13 and the air discharge passage 12 is greater than that in the valve function cavity 23. The valve function piece 33 elastically deforms to release the blockage of the communication cavity 13 and the air discharge passage 12, so that the output flow path 11, the communication cavity 13 and the air discharge passage 12 are connected, allowing the gas to flow from the output flow path 11 to the air discharge passage 12 and be discharged to the outside, thereby realizing the air release of the pump. It should be noted that since the gas in the intake cavity 14 flows in the opposite direction to the output flow path 11, that is, it buffers the gas entering the output flow path 11, ensuring the stability of the original gas flow pressure during the air release process. At the same time, the gas flowing from the output flow path 11 to the communication cavity 13 and the air discharge passage 12 does not interfere with each other, and tries to avoid the blockage of the air release caused by the original gas flow pressure, thereby improving the stability of the air release.

[0037] Referring to Figure 1 and Figure 3 , in some embodiments, the output flow path 11 includes an output nozzle 111, an output flow channel 112, and a buffer cavity 113. The output nozzle 111 is integrally connected to the upper cover 1 and connected to the working bladder cavity. The output flow channel 112 is located at the lower end of the output nozzle 111 and is communicated with the through hole of the output nozzle 111. The buffer cavity 113 is circular and is located between the two intake cavities 14, and the output flow channel 112 extends linearly to the central position of the buffer cavity 113. Moreover, a buffer flow channel 15 is provided on the lower side of the upper cover 1. The buffer flow channel 15 is perpendicular to the output flow channel 112. The buffer flow channel 15 penetrates through the buffer cavity 113 and is respectively connected to the two intake cavities 14 at both ends. The gas in the two intake cavities 14 enters the buffer cavity 113 from the buffer flow channel 15 in opposite flow directions, and the two gas flows collide to buffer the gas in the two intake cavities 14, reducing the gas flow rate. The buffered gas then flows from the output flow channel 112 to the output nozzle 111, effectively reducing the noise generated by the friction between the gas and the output flow channel 112 while ensuring a large intake volume.

[0038] In some embodiments, a partition protrusion 114 is provided in the buffer cavity 113. The partition protrusion 114 is provided on the side of the buffer cavity 113 away from the output flow channel 112. The partition protrusion 114 is rectangular and is on the same straight line as the output flow channel 112. The partition protrusion 114 is partially located on the straight line of the buffer flow channel 15, so that part of the gas flowing out of the buffer flow channel 15 contacts the partition protrusion 114, that is, the partition protrusion 114 blocks and buffers part of the gas, improving the buffering effect of the gas in the buffer cavity 113. In addition, when the pump stops inputting gas, the gas flowing back from the working bladder cavity can contact the end of the partition protrusion 114, so that the gas flows back to the communication cavity 13, thereby improving the air release efficiency.

[0039] Referring to Figure 3 and Figure 4, in some embodiments, a first flow channel 16 is further provided on the lower side of the upper cover 1. The first flow channel 16 is located between the output flow path 11 and the communication cavity 13. Specifically, the first flow channel 16 includes an intake section 161, a buffer section 162, and an outlet section 163 that are sequentially connected. The intake section 161 is provided as a straight section and is connected to the output flow channel 112. The outlet section 163 is also provided as a straight section and is connected to the communication cavity 13. Among them, the buffer section 162 is generally provided as a "U" - shaped section. One end of the buffer section 162 is perpendicularly arranged with the intake section 161, and the other end extends with a partial straight section, so that the gas flow direction towards the outlet section 163 is opposite to the gas flow direction of the intake section 161. The buffer section 162 buffers the gas entering from the intake section 161 to reduce the gas flow rate, so that the gas can stably enter the communication cavity 13 from the outlet section 163. At this time, the air pressure in the communication cavity 13 is greater than that in the valve function cavity 23, so that the valve function piece 33 stably releases the blockage of the communication cavity 13 and the anti - leakage flow path 22, thereby improving the stability of air leakage.

[0040] In some embodiments, an intake protrusion 164 is provided on the intake section 161. The intake protrusion 164 reduces the intake area at the intake end of the intake section 161 (i.e., the end of the intake section 161 close to the output flow channel 112), increases the air pressure of the gas in the intake section 161, to ensure that the buffered gas can flow into the buffer section 162, and under the guidance of the intake fillet 165, the gas can enter the intake section more easily and stably, so as to improve the intake stability of the intake section 161.

[0041] In some embodiments, a buffer protrusion 166 is provided on the buffer section 162. The buffer protrusion 166 is located at the middle position of the buffer section 162 and is provided in an arc shape. At the same time, the buffer protrusion 166 is flush with the intake protrusion 164. During the buffering process of the gas in the buffer section 162, the gas contacts the buffer protrusion 166, and under the guidance of the buffer fillet 167, further buffering of the gas is realized to reduce the noise during air leakage, and the buffer protrusion 166 can ensure that the gas can stably flow into the outlet section 163.

[0042] In some embodiments, an outlet protrusion 168 is provided on the outlet section 163. Both ends of the outlet protrusion 168 are provided with outlet fillets 169, and there is an included angle between the outlet section 163 and the end of the buffer section 162 far from the intake section 161. The included angle is an obtuse angle, so that the included angle between the outlet protrusion 168 and the buffer section 162 is an obtuse angle. The outlet protrusion 168 makes it easier for the gas to enter the communication cavity 13, to ensure that the valve function piece 33 can release the blockage of the communication cavity 13 under the action of air pressure, and the outlet protrusion 168 and the buffer section 162 have an included angle, realizing further buffering of the gas, and trying to avoid the air pressure in the communication cavity 13 being too large, resulting in an unstable air leakage process.

[0043] In some embodiments, the degassing flow path 12 includes a degassing nozzle 121 and a degassing cavity 122. The degassing nozzle 121 protrudes from the degassing cavity 122, and the two ends of the through hole of the degassing nozzle 121 are respectively connected to the degassing cavity 122 and the outside of the pump head. At the same time, a limiting protrusion 131 is provided in the connecting cavity 13. In actual application, the valve function piece 33 abuts against the limiting protrusion 131 and the degassing nozzle 121 under the action of air pressure to achieve the blocking of the connecting cavity 13 and the degassing flow path. When the pump stops inputting gas, the gas flowing back from the working bag cavity can flow from the first flow channel 16 to the connecting cavity 13, so that the valve function piece 33 releases the abutment against the limiting protrusion 131. Further, the gas flows into the degassing cavity 122, so that the valve function piece 33 releases the abutment against the degassing nozzle 121. Two limiting fillets 132 are provided on the lower side of the limiting protrusion 131 so as to allow the valve function piece 33 to abut against the limiting protrusion 131 more closely.

[0044] In one embodiment, a second flow channel 17 is provided on the lower side of the upper cover 1. The second flow channel 17 is arranged parallel to the air inlet section 161 and its two ends are respectively connected to the connecting cavity 13 and the air release cavity 122. Both ends of the second flow channel 17 are provided with connecting protrusions 171, and both ends of the two connecting protrusions 171 are provided with connecting fillets 172, which further achieves buffering of the gas, so that the gas can be discharged from the air release nozzle 121 more stably.

[0045] The implementation principle of this embodiment is: in actual application, there are three flow paths for gas in the pump head, two of which are that the gas enters the air inlet chamber 14 from the input flow path 21 through the suction one-way valve plate 31, and the gas in the air inlet chamber 14 enters the output flow path 11 respectively, and finally flows into the working bag chamber; the other is that the gas enters the valve function chamber 23 from the leakage stop flow path 22 through the discharge check valve plate 32, so that the valve function plate 33 blocks the leakage flow path 12 and the connecting chamber 13, so as to limit the gas from flowing to the connecting chamber 13 or the leakage flow path 12, which can doubly limit the leakage of gas in the pump head. Even if the reliability of the opening and closing of the valve function plate 33 is limited, leakage during the pumping process can be avoided as much as possible.

[0046] Furthermore, when the pump stops inputting gas, the gas in the working chamber flows back into the connecting chamber 13 and the exhaust gas path 12 under the action of air pressure. The air pressure in the connecting chamber 13 and the exhaust gas path 12 is greater than that in the valve function chamber 23, and the valve function plate 33 elastically deforms to release the blockage of the connecting chamber 13 and the exhaust gas path 12, thereby connecting the output flow path 11, the connecting chamber 13, and the exhaust gas path 12. This allows the gas to flow from the output flow path to the exhaust gas path 12 and be discharged to the outside, thereby achieving the pump's exhaust. It should be noted that because the gas in the inlet chamber 14 flows from the opposite direction to the output flow path 11, the gas entering the output flow path 11 is buffered, ensuring the stability of the original air flow pressure during the exhaust process. At the same time, the gas flowing from the output flow path 11 to the connecting chamber 13 and the exhaust gas path 12 does not interfere with each other, minimizing the blockage of the exhaust gas pressure by the original air flow, thereby improving the exhaust gas stability.

[0047] The embodiment of the present application also discloses a micro air pump with dual functions of pump and valve.

[0048] Reference Figure 5 and Figure 6 The pump-valve dual-function micro air pump includes a pump body 4, a driving mechanism 5 and the pump head described in the above embodiment. The pump body 4 includes a diaphragm seat 41 and a cup capsule 42 that is unidirectionally connected to the two input flow paths 21 and the anti-leakage flow path 22. The driving mechanism 5 transmits and connects the cup capsule 42 to cause the cup capsule 42 to deform, driving the fluid in the cup capsule 42 into the two input flow paths 21 and the anti-leakage flow path 22.

[0049] Specifically, the cup bladder 42 is mounted on the side of the diaphragm seat 2 away from the upper cover 1 via a diaphragm seat 41. A one-way flow channel is provided on the diaphragm seat 41, connecting the cup bladder 42 with the outside world, allowing external fluid to enter the cup bladder 42. It should be noted that the cup bladder 42 is an elastic member. When the cup bladder 42 is compressed and stretched, the fluid in the cup bladder 42 flows into the two input flow paths 21 and the anti-leakage flow path 22.

[0050] In this embodiment, there are three cup capsules 42, two of which correspond to the intersections of the two input flow paths 21 and are used to pump gas into the two input flow paths 21, and the other cup capsule 42 corresponds to the intersection of the anti-leakage flow path 22 and is used to pump gas into the anti-leakage flow path 22. By independently pumping gas into the two input flow paths 21 and the anti-leakage flow path 22 through the three cup capsules 42, the independence of the three gas flow paths can be achieved.

[0051] The driving mechanism 5 includes a base 51, a driving motor 52 and a driving assembly 53. The driving motor 52 is fixedly connected to the base 51. The driving assembly 53 includes an eccentric wheel 531 and a rocker 532. The eccentric wheel 531 is coaxially and fixedly connected to the output shaft of the driving motor 52. The rocker 532 is fixedly connected to the upper end of the eccentric wheel 531 and the rocker 532 is respectively connected to the lower ends of the three cup-shaped bladders 42, so that the rotation of the driving motor 52 drives the eccentric rocker 532 structure to perform a periodic reciprocating motion, thereby causing the three cup-shaped bladders 42 to periodically generate deformation to pump in fluid.

[0052] The implementation principle of this embodiment is as follows: The rotation of the driving motor 52 drives the eccentric rocker 532 structure to perform a periodic reciprocating motion, thereby causing the three cup-shaped bladders 42 to periodically generate deformation to pump in fluid, so that gas enters the two input flow paths 21 and the airtight flow path 22. The gas passes through the inhalation check valve piece 31 from the input flow path 21 and enters the two air inlet cavities 14. The gas in the two air inlet cavities 14 respectively enters the output flow path 11 and finally flows into the working bladder cavity. And the gas passes through the discharge check valve piece 32 from the airtight flow path 22 and enters the valve function cavity 23, so that the valve function piece 33 blocks the air leakage flow path 12 and the communication cavity 13 to realize the air pumping process.

[0053] When the driving mechanism 5 stops working, the gas in the working bladder cavity flows back to the communication cavity 13 and the air leakage flow path 12 under the action of air pressure. At this time, the valve function piece 33 releases the blockage of the communication cavity 13 and the air leakage flow path 12 under the action of air pressure, so that the output flow path 11, the communication cavity 13 and the air leakage flow path 12 are communicated, so that the gas flows from the output flow to the air leakage flow path 12 and is discharged to the outside to realize the air release function.

[0054] The above are all the preferred embodiments of this application. The protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape and principle of this application should be covered within the protection scope of this application.

Claims

1. A pump head, characterized in that, Comprising: An upper cover (1), the upper cover (1) being provided with an output flow path (11), an air release flow path (12), a communication cavity (13), and two air intake cavities (14) for communicating with the working bladder cavity; the output flow path (11), the communication cavity (13), and the air release flow path (12) are sequentially communicated; the two air intake cavities (14) are respectively located on opposite sides of the output flow path (11), and the gas in the two air intake cavities (14) flows towards the output flow path (11) from opposite directions; A diaphragm seat (2), the diaphragm seat (2) being provided with an input flow path (21), a non-return flow path (22), and a valve function cavity (23); the input flow path (21) is communicated with the two air intake cavities (14); the non-return flow path (22) is communicated with the valve function cavity (23); A dual-function valve plate (3), the dual-function valve plate (3) being arranged between the upper cover (1) and the diaphragm seat (2); the dual-function valve plate (3) is provided with a suction check valve plate (31), a discharge check valve plate (32), and a valve function plate (33); the suction check valve plate (31) unidirectionally communicates the input flow path (21) towards the air intake cavity (14); the discharge check valve plate (32) unidirectionally communicates the non-return flow path (22) towards the valve function cavity (23); the valve function plate (33) blocks the air release flow path (12) and the communication cavity (13) according to the air pressure in the valve function cavity (23).

2. A pump head according to claim 1, wherein The output flow path (11) includes an output nozzle (111), an output flow channel (112), and a buffer cavity (113), the output flow channel (112) is located at one end of the output nozzle (111), the buffer cavity (113) is located between the two air intake cavities (14) and is communicated with the output flow channel (112); the upper cover (1) is provided with a buffer flow channel (15), and both ends of the buffer flow channel (15) are communicated with the two air intake cavities (14) and penetrate through the buffer cavity (113).

3. A pump head according to claim 2, wherein The buffer cavity (113) is provided with a partition protrusion (114), the partition protrusion (114) is arranged on the side of the buffer cavity (113) away from the output flow channel (112), and the partition protrusion (114) and the output flow channel (112) are located on the same straight line.

4. A pump head according to claim 1, wherein The upper cover (1) is provided with a first flow channel (16) between the output flow path (11) and the communicating cavity (13); the first flow channel (16) comprises an air inlet section (161), a buffer section (162), and an air outlet section (163) which are connected in sequence, and the air inlet section (161) is connected to the output flow path (11), and the air outlet section (163) is connected to the communicating cavity (13); wherein, under the action of the buffer section (162), the gas in the air inlet section (161) flows in the opposite direction to the air outlet section (163).

5. A pump head according to claim 4, characterized in that: The air intake section (161) is provided with an air intake protrusion (164), and an air intake fillet (165) is provided at one end of the air intake protrusion (164) close to the output flow path (11).

6. A pump head according to claim 4, characterized in that: The buffer section (162) is provided with a buffer protrusion (166), and both ends of the buffer protrusion (166) are provided with buffer fillets (167).

7. A pump head according to claim 4, characterized in that: The air outlet section (163) is provided with an air outlet protrusion (168), both ends of the air outlet protrusion (168) are provided with air outlet fillets (169), and an angle is formed between the air outlet protrusion (168) and an end of the buffer section (162) away from the air inlet section (161), and the angle is an obtuse angle.

8. A pump head according to claim 1, characterized in that: The degassing flow path (12) comprises a degassing nozzle (121) and a degassing cavity (122); the degassing nozzle (121) is arranged in the degassing cavity (122); and a limiting protrusion (131) is provided in the communicating cavity (13).

9. A pump head according to claim 8, characterized in that: The upper cover (1) is provided with a second flow channel (17) between the communication cavity (13) and the air release cavity (122), and both ends of the second flow channel (17) are provided with communication protrusions (171), and both ends of the two communication protrusions (171) are provided with communication fillets (172).

10. A micro air pump with dual functions of pump and valve, characterized in that: The invention comprises a pump body (4), a driving mechanism (5), and a pump head according to any one of claims 1 to 9, wherein the pump body (4) comprises a cup capsule (42) in one-way communication with the input flow path (21) and the anti-leakage flow path (22), and the driving mechanism (5) is connected to the cup capsule (42) in a transmission manner to force the cup capsule (42) to deform and drive the gas in the cup capsule (42) to enter the input flow path (21) and the anti-leakage flow path (22).

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