CN220599979U - Reflux noise reduction vacuum pump - Google Patents

Abstract

The utility model relates to a reflux noise reduction vacuum pump which is used for a microminiature diaphragm pump for vacuumizing products such as a breast pump and the like, and the vacuum pump comprises a reflux cavity shell, a one-way control valve device, a diaphragm device, a driving device, an air inlet and an air outlet. The double-channel and double-silencing backflow cavity provided by the utility model can buffer sound generated by rapid air flow, reduce noise of the micro pump and improve use experience of the micro vacuum pump.

Description

Reflux noise reduction vacuum pump

Technical Field

The utility model relates to a micro pump device, in particular to a diaphragm air pump with a backflow cavity, and especially relates to a backflow noise reduction vacuum pump.

Background

The rotary microminiature diaphragm pump is widely applied to daily small electric appliances, such as in the applications of breast pumps, cleaning industries and the like, and in order to improve the use experience of users, a vacuum pump or an air pump with low noise and compact external dimensions is required so as to meet the user experience requirement of home appliance silence.

Aiming at the problems, the utility model adopts the following technical proposal to improve.

Disclosure of Invention

The utility model aims to provide a reflux noise reduction vacuum pump, which has the following technical scheme:

the utility model provides a vacuum pump of making an uproar falls in backward flow for the microminiature diaphragm pump of evacuation in like products such as breast pump, vacuum pump (10) include backward flow chamber casing (11), one-way control valve device (12), diaphragm device (13), drive arrangement (14), and air inlet (15) and gas outlet (16), and characterized in that still includes first amortization backward flow chamber (21) and second backward flow chamber (22), air inlet (15) and gas outlet (16) set up on drive arrangement (14), first amortization backward flow chamber (21) and second backward flow chamber (22) set up in the tip of keeping away from drive arrangement (14), air inlet (15) connect in first amortization backward flow chamber (21) through first amortization passageway (31), gas outlet (16) connect in second backward flow chamber (22) through second amortization passageway (32). When the vacuum pump is pumping gas, the air flow is sucked from the air inlet, enters the first backflow cavity through the first silencing channel, enters the second backflow cavity after passing through the diaphragm device with the suction function, and is discharged from the air outlet through the second silencing channel after silencing and backflow, so that the sound generated by the rapid air flow is buffered, the using noise of the micro pump is greatly reduced, and the using experience of the micro vacuum pump is improved.

Further, the driving device (14) comprises a motor (141), an eccentric rotation driving device (142) and a fixed shell seat (143), and the air inlet (15) and the air outlet (16) are arranged on the fixed shell seat (143). The fixed shell seat is used for fixing the motor and the eccentric rotary driving device, the motor is locked and fixed on the end face of the fixed shell seat through screws, and the eccentric rotary driving device is arranged in the hollow cylindrical fixed shell seat and is in rotary transmission connection with the motor.

Further, the air inlet (15) is arranged as an air outlet nozzle structure on the outer side wall of the fixed shell seat (143). The vacuum pump of the utility model is used for a breast pump, and the air inlet is connected with the suction pipe orifice of the breast pump.

Further, the air outlet (16) is a strip-shaped air outlet groove (161) arranged on the end face of the fixed shell seat (143) close to the motor.

Further, the strip-shaped air outlet grooves (161) are arranged as curved grooves distributed on the end face of the fixed shell seat (143) in an S or L shape.

Furthermore, the air outlet groove (161) is arranged as an invisible air outlet (16) on the side surface angle of the end face of the fixed shell seat (143) and is hidden on the clamping groove port buckled with the whole pump. The whole vacuum pump is fixed by elastic buckles, generally forms a fixed triangle by three buckles, and is elastically buckled and fixed by matching with a clamping groove designed on the pump outer shell. The air outlet is arranged on the end face of the fixed shell seat, which is close to the motor part, namely, the side corner of the end face locked by the motor screw, so that the air outlet is hidden, and the buffer air flow formed by shielding of the motor end face can play a silencing role.

Further, the first silencing backflow cavity (21) is arranged before the fluid passes through the pumping gas of the diaphragm device (13), and the second backflow cavity (22) is arranged after the fluid passes through the pumping gas of the diaphragm device (13). The reflux cavities for fluid reflux buffering are respectively arranged before and after the diaphragm device extracts gas, and the reflux cavities are reasonably arranged to buffer the fastest part in the gas transmission process of the microminiature diaphragm vacuum pump, so that the silencing effect is effectively achieved.

Further, a one-way valve device is arranged at the position where the first silencing backflow cavity (21) and the second backflow cavity (22) are in gas flow connection with the diaphragm device (13). The one-way valve device can be a plurality of umbrella-shaped diaphragm valves arranged at the inlet and the outlet of the diaphragm device, or a combined valve diaphragm, or a valve plate of a human head directly arranged on the diaphragm, and is matched with the valve seat to realize the one-way flow guiding effect on the air flow.

Further, the first silencing backflow cavity (21) is communicated with one or more than one first silencing channels (31) and is connected with the air inlet (15). I.e. the air flow enters the first silencing backflow cavity (21) from a single first silencing channel (31) and then is dispersed to the inlet of each diaphragm capsule, or the preferable structure is matched with the number of the diaphragm capsules of the diaphragm, i.e. each diaphragm capsule is matched with one first silencing channel to be connected.

Further, the second reflux cavity (22) is communicated with one or more second silencing channels (32) at the air outlet (16). That is, the air flows are joined by the second return chambers and then connected to the air outlet (16) through a single second silencing channel, or the preferable structure is that the number of the diaphragm bags of the diaphragm is matched with that of the diaphragm, and each diaphragm bag is matched with a second silencing channel (32). In a preferred embodiment of the utility model, the diaphragm of the diaphragm device is provided with three diaphragm bags, and the inlet and the outlet of each diaphragm bag are respectively communicated with the first backflow cavity and the second backflow cavity through one-way valves.

According to the technical scheme, the utility model has the following beneficial effects: according to the reflux type noise reduction vacuum pump, the silencing channel and the reflux cavity are arranged on the suction fluid channel of the vacuum pump, so that rapid air flow is buffered and the flow is prolonged, the working noise of the miniature vacuum pump is reduced, and the use experience effect of the whole product is improved; particularly, the reflux cavities are respectively arranged at the front section and the rear section of the diaphragm suction and are respectively suitable for the first air inlet silencing channel and the air outlet silencing channel, and the reasonable design and arrangement realize better noise reduction effect; and the air outlet is arranged as a strip-shaped air outlet groove which is hidden and bent, is arranged on the contact bottom surface of the driving shell and the motor and is communicated with the clamping groove at the bottom angle position, so that the divergence and buffering of the airflow at the fluid outlet are realized, and the better noise reduction effect is realized.

Drawings

Fig. 1 is a schematic perspective view showing the overall structure of a vacuum pump according to a first embodiment of the present utility model;

FIG. 2 is an exploded top view schematically showing the overall structure of a vacuum pump according to a first embodiment of the present utility model;

FIG. 3 is a schematic front view showing the overall structure of a vacuum pump according to a first embodiment of the present utility model;

FIG. 4 is a schematic cross-sectional view of the overall structure A-A of the vacuum pump according to the first embodiment of the preferred embodiment of the present utility model;

FIG. 5 is an exploded bottom view schematically showing the overall structure of a vacuum pump according to a first embodiment of the present utility model;

FIG. 6 is an exploded view of a vacuum pump return chamber according to a first embodiment of the present utility model;

fig. 7 is a schematic perspective view showing the overall structure of a vacuum pump according to a second embodiment of the present utility model;

FIG. 8 is an exploded top view schematically showing the overall structure of a vacuum pump according to a second embodiment of the present utility model;

fig. 9 is a schematic front view showing the overall structure of a vacuum pump according to a second embodiment of the present utility model;

FIG. 10 is a schematic cross-sectional view of the overall structure B-B of the vacuum pump according to the first embodiment of the preferred embodiment of the present utility model;

FIG. 11 is an exploded bottom view schematically showing the overall structure of a vacuum pump according to a first embodiment of the present utility model;

fig. 12 is an exploded view of a vacuum pump reflow chamber according to a second embodiment of the present utility model.

Description of the embodiments

The utility model will be further described with reference to the drawings and detailed description.

The vacuum pump 10 comprises a reflux cavity shell 11, a one-way control valve device 12, a diaphragm device 13, a driving device 14, an air inlet 15 and an air outlet 16, a first silencing reflux cavity 21 and a second reflux cavity 22, wherein the air inlet 15 and the air outlet 16 are arranged on the driving device 14, the first silencing reflux cavity 21 and the second reflux cavity 22 are arranged at the end far away from the driving device 14, the air inlet 15 is connected with the first silencing reflux cavity 21 through a first silencing channel 31, and the air outlet 16 is connected with the second reflux cavity 22 through a second silencing channel 32. Wherein the one-way control valve device 12 is provided with a valve seat 121, a diaphragm air inlet one-way valve 122 and a diaphragm air inlet one-way valve 123, in the embodiment, the diaphragm air inlet one-way valve 122 is an umbrella valve, and the diaphragm air inlet one-way valve 123 is an outlet valve membrane; the diaphragm device 13 comprises a diaphragm 131 and a diaphragm seat 132, the diaphragm 131 is arranged on the diaphragm seat 132, and an adaptive diaphragm bag 1312 is arranged in a mounting hole of the diaphragm seat; the driving device 14 comprises a motor 141, an eccentric driving device 142 and a fixed shell seat 143, wherein the motor 141 is fixedly arranged on an end panel of the fixed shell seat 143 through a screw 18, and the eccentric driving device 142 is arranged in an inner cavity of the fixed shell seat 143 and is in rotary driving connection with the motor 141.

As shown in the directions of fluid arrows in fig. 2 and 4, when the vacuum pump 10 draws gas, the vacuum pump sucks the gas from the gas inlet 15, enters the first backflow cavity 31 through the first silencing channel 21, enters the second backflow cavity 32 after passing through the diaphragm device 13 with the suction function, and discharges the gas from the gas outlet 15 through the second silencing channel 22 after silencing and backflow; the first silencing channel 21 is formed by arranging a first section channel 211 communicated with the air tap of the air inlet 15 in the inner cavity of a fixed shell seat 143 in the driving device 14, a second section channel 212 arranged on a diaphragm seat 132, a channel hole 1311 penetrating through the diaphragm 131, and a third section channel 213 passing through a valve seat 123 to enter a first backflow cavity 31 arranged on the backflow cavity shell 11. And the second muffler passage 22 is introduced from the second return chamber 32 of the return chamber housing 11 through the fourth passage 221 provided in the valve seat 123, the passage hole 1311 of the diaphragm 131, and the fifth passage 222 provided in the valve seat 123, into the outlet 16 provided in the stationary housing 143 of the driving device 14, and the gas is discharged from the gas outlet groove 161.

As shown in fig. 6, in the reflux cavity structure arranged at the front and rear sections of the diaphragm suction of the vacuum pump, the reflux cavity housing 11 and the one-way control valve device 12 are sealed and buckled to form a first reflux cavity 31 and a second reflux cavity 32, and after the air flow sucked by the air inlet 15 is led into the first reflux cavity 31 from the second section channel 212 of the valve seat, the air flow is sucked into the diaphragm device through the diaphragm air inlet hole 1231 arranged on the valve seat 123, and then flows out from the diaphragm air outlet hole 1232 to enter the second reflux cavity 32. The second recirculation chamber 32 in this embodiment merges the gases into an outlet port which is directed from the fourth channel 221 to the outlet port 16. As in the second embodiment of fig. 12, the second return chamber 32 is divided into three flow-guiding chambers, from three fourth channels 221 to the outlet of the drive device.

As shown in fig. 5, the driving device 14 includes a motor 141, an eccentric rotation driving device 142, and a fixed housing seat 143, and the air inlet 15 and the air outlet 16 are provided at the fixed housing seat 143. The fixed shell seat is used for fixing the motor and the eccentric rotary driving device, the motor is locked and fixed on the end face of the fixed shell seat through screws, and the eccentric rotary driving device is arranged in the hollow cylindrical fixed shell seat and is in rotary transmission connection with the motor.

As shown in fig. 1 to 4, the air inlet 15 is provided in a nozzle structure on the outer side wall of the stationary housing 143. The vacuum pump of the utility model is used for a breast pump, and the air inlet is connected with the suction pipe orifice of the breast pump.

As shown in fig. 5 and 10, an air outlet groove 161, which has an elongated shape of the air outlet 16, is provided on the end face of the stationary housing seat 143 adjacent to the motor. In fig. 5, there is shown an embodiment of the present utility model in which only one outlet port is provided after the second reflow chamber 32 collects the air flow, and the air flow is led to the outlet port 16 from the second reflow chamber 32 through three silencing channels, as shown in fig. 10, and the three outlet ports 16 are matched with three outlet grooves 161.

As shown in fig. 5 and 10, the elongated air outlet grooves 161 are provided as curved grooves distributed in an S-or L-shape on the end face of the stationary housing seat 143. The air outlet groove 161 is arranged as an invisible air outlet 16 on the side face angle of the end face of the fixed shell seat 143, and is hidden on the clamping groove port of the integral buckling of the pump. The whole vacuum pump 10 is fixed by elastic buckles 17, generally three buckles 17 form a fixed triangle, and the triangle is elastically buckled and fixed by matching with a clamping groove designed on the whole pump shell. The air outlet 16 is arranged on the end face of the fixed shell seat 143 close to the motor part, namely, the side corner of the end face of the motor locked by the screw 18, so that the air outlet is hidden, and the buffer air flow formed by shielding the end face of the motor is shielded to play a silencing effect.

As shown in fig. 5 and 6, the first sound deadening and backflow chamber 21 is provided before the suction gas of the fluid passing through the diaphragm device 13, and the second backflow chamber 22 is provided after the suction gas of the fluid passing through the diaphragm device 13. The reflux cavities for fluid reflux buffering are respectively arranged before and after the diaphragm device 13 extracts gas, so that the most rapid part in the gas transmission process of the microminiature diaphragm vacuum pump is buffered by reasonable arrangement, and the silencing effect is effectively achieved.

As shown in fig. 2, 5, 8 and 10, the first silencing backflow chamber 21 and the second backflow chamber 22 are provided with check valve devices at positions where the first silencing backflow chamber and the second silencing backflow chamber 22 are connected with the diaphragm device 13 in a gas flow manner. The one-way valve device can be a plurality of umbrella-shaped diaphragm valves arranged at the inlet and the outlet of the diaphragm device, or a combined valve diaphragm, or a valve plate of a human head directly arranged on the diaphragm, and is matched with the valve seat to realize the one-way flow guiding effect on the air flow. As shown in fig. 2, 5 and 6, in the first embodiment, an umbrella-shaped diaphragm valve structure is used for the inlet 1231 of the diaphragm 131, and a triangular valve diaphragm structure is used for the outlet 1232.

As shown in fig. 6 and 12, the first silencing backflow chamber 21 communicates with one or more first silencing channels 31 to the intake port 15. I.e. the air flow enters the first silencing return chamber 21 from a single first silencing channel 31 and then is dispersed to the inlet of each diaphragm capsule, or the preferable structure is matched with the number of diaphragm capsules of the diaphragm, i.e. each diaphragm capsule is matched with one first silencing channel for connection.

And, the second return chamber 22 communicates with one or more second sound attenuating passages 32 to the air outlet 16. I.e. the air flows are joined by the second return chambers and then connected to the air outlet 16 by a single second sound-deadening passageway, or preferably are configured to match the number of diaphragm cells of the diaphragm, each diaphragm cell being associated with a second sound-deadening passageway 32. In a preferred embodiment of the utility model, the diaphragm of the diaphragm device is provided with three diaphragm bags, and the inlet and the outlet of each diaphragm bag are respectively communicated with the first backflow cavity and the second backflow cavity through one-way valves.

In the second embodiment shown in fig. 7 to 12, after the air flow enters the driving device casing of the pump from the air inlet, as shown in fig. 10, the whole pump cavity is that the first silencing channel 31 is communicated with the first silencing backflow cavity 21, as shown in fig. 12, the first silencing backflow cavity 21 is composed of three parts corresponding to three diaphragm bags, the air flow of the first silencing backflow cavity 21 is sucked into the diaphragm 131 through the human head-shaped air inlet check valve 122, then is guided into the second silencing backflow cavity 22 through the umbrella-shaped air outlet check valve 123, the three-piece type blade cavity arranged in the second silencing backflow cavity 22 guides the air flow to the fourth channel 221 arranged on the valve seat 123, the three second silencing channels 32 on the periphery of the diaphragm pump are connected to the air outlets 16, the three air outlets 16 are arranged around the periphery of the end face of the fixed casing 143 of the driving device 14, the air outlet 161 with three bent air flow buffering grooves 161 are preferably arranged in an L shape. In the second embodiment, a reasonable arrangement is realized in correspondence with the design of the corresponding three diaphragm capsules.

The above is one embodiment of the present utility model. In addition, it should be noted that all equivalent or simple changes of the structure, features and principles described in this patent conception are included in the scope of the present patent.

Claims (10)

1. The utility model provides a vacuum pump of making an uproar falls in backward flow, includes backward flow chamber casing (11), one-way control valve device (12), diaphragm device (13), drive arrangement (14), and air inlet (15) and gas outlet (16), its characterized in that still includes first amortization backward flow chamber (21) and second backward flow chamber (22), air inlet (15) and gas outlet (16) set up on drive arrangement (14), first amortization backward flow chamber (21) and second backward flow chamber (22) set up in the tip of keeping away from drive arrangement (14), air inlet (15) connect in first amortization backward flow chamber (21) through first amortization passageway (31), gas outlet (16) connect in second backward flow chamber (22) through second amortization passageway (32).

2. A reflux noise reduction vacuum pump according to claim 1, characterized in that the driving means (14) comprises a motor (141), an eccentric rotary driving means (142) and a stationary housing (143), the air inlet (15) and the air outlet (16) being arranged in the stationary housing (143).

3. A return noise reducing vacuum pump according to claim 2, wherein the air inlet (15) is provided as an air outlet structure on the outer side wall of the stationary housing (143).

4. A reflux noise reduction vacuum pump according to claim 2, characterized in that the air outlet (16) is an elongated air outlet groove (161) arranged on the end face of the fixed housing (143) close to the motor.

5. A reflux noise reduction vacuum pump according to claim 4, characterized in that the elongated air outlet grooves (161) are provided as curved grooves distributed like S or L on the end face of the stationary housing (143).

6. The vacuum pump of claim 5, wherein the air outlet groove (161) is formed as an invisible air outlet (16) on the side surface angle of the end face of the fixed housing seat (143), and is hidden on the clamping groove port of the pump.

7. A return noise reducing vacuum pump according to claim 1, characterized in that the first sound reducing return chamber (21) is arranged before the suction of the fluid through the diaphragm means (13) and the second return chamber (22) is arranged after the suction of the fluid through the diaphragm means (13).

8. A reflux noise reduction vacuum pump according to claim 7, characterized in that the first and second silencing reflux chambers (21, 22) are provided with one-way valve means at the location where they are in gas flow connection with the diaphragm means (13).

9. A reflux noise reduction vacuum pump according to claim 1, characterized in that the first noise reduction reflux chamber (21) is in communication with one or more first noise reduction channels (31) in the air inlet (15).

10. A return noise reducing vacuum pump according to claim 1, wherein the second return chamber (22) communicates with one or more second sound attenuating passages (32) to the air outlet (16).