CN204186558U - Air pump - Google Patents

Abstract

The utility model discloses a kind of air pump, described air pump comprises: upper cover, valve seat and valve block, cover on described and be formed with air outlet, described valve seat is located at the bottom of described upper cover, described valve seat is formed with suction port, the air-inlet cavity communicated with each other and outlet chamber is limited between described valve seat and described upper cover, described air-inlet cavity is communicated with described suction port, described outlet chamber is communicated with by the exhaust passage be limited between described upper cover and described valve seat with described air outlet, and described valve block is located at described suction port movably and sentences the described suction port of opening and closing.According to air pump of the present utility model, by arranging exhaust passage between outlet chamber and air outlet, thus significantly reducing the operating noise of air pump, improve the quality of product.

Description

Air pump

Technical field

The utility model relates to air pump apparatus field, especially relates to a kind of air pump.

Background technique

Micro air pump is widely used in the field such as medical apparatus, automotive seat, such as sphygmomanometer, massage chair etc., but the air pump in correlation technique easily produces noise in the course of the work, reduces the quality of product.

Model utility content

The utility model is intended at least to solve one of technical problem existed in prior art.For this reason, the utility model is to propose a kind of air pump, and the operating noise of described air pump is low.

According to air pump of the present utility model, comprising: upper cover, cover on described and be formed with air outlet; Valve seat, described valve seat is located at the bottom of described upper cover, described valve seat is formed with suction port, the air-inlet cavity communicated with each other and outlet chamber is limited between described valve seat and described upper cover, described air-inlet cavity is communicated with described suction port, and described outlet chamber is communicated with by the exhaust passage be limited between described upper cover and described valve seat with described air outlet; And valve block, described valve block is located at described suction port movably and sentences the described suction port of opening and closing.

According to air pump of the present utility model, by arranging exhaust passage between outlet chamber and air outlet, thus significantly reducing the operating noise of air pump, improve the quality of product.

Particularly, described valve seat is provided with the downtake pipe upwards extended, the second exhaust pipe be provided with to downward-extension is covered on described, described downtake pipe coordinates to limit exhaust passage with described second exhaust pipe, and the two ends of described exhaust passage are communicated with described air outlet with described outlet chamber respectively.

Particularly, described second exhaust pipe stretches in described downtake pipe, and the outer wall of described second exhaust pipe and the inwall of described downtake pipe are spaced apart from each other to limit described exhaust passage.

Particularly, the top of described downtake pipe is provided with at least one first intercommunicating pore to be communicated with described outlet chamber described exhaust passage, and the open bottom end of described second exhaust pipe and the direction along described air outlet extend.

Particularly, described first intercommunicating pore be two and described two the first intercommunicating pores along described downtake pipe diametrically.

Particularly, the top of described downtake pipe is provided with at least one first intercommunicating pore to be communicated with described outlet chamber described exhaust passage, one end that described second exhaust pipe stretches into described downtake pipe is sealed end, and the perisporium of described second exhaust pipe is provided with at least one second intercommunicating pore to be communicated with described air outlet described exhaust passage.

Particularly, one end that described second exhaust pipe stretches into described downtake pipe is fixed on the bottom surface of described downtake pipe, described second intercommunicating pore be two and described two the second intercommunicating pores along described second exhaust pipe diametrically, described first intercommunicating pore and described second intercommunicating pore radial direction are crisscross arranged.

Particularly, the top of described valve seat is formed with the 3rd recessed outgassing groove downwards, described 3rd outgassing groove and described upper cover limit described outlet chamber jointly, the 3rd outlet pipe be provided with to downward-extension is covered on described, described 3rd outlet pipe is provided with at least one third through-hole, and described outlet chamber is communicated with by described third through-hole with described air outlet.

Particularly, the bottom of described upper cover is formed with the 4th outgassing groove to being recessed on, described 4th outgassing groove and described valve seat limit described outlet chamber jointly, described valve seat is provided with the 4th outlet pipe upwards extended, described 4th outlet pipe is provided with at least one fourth hole, and described outlet chamber is communicated with by described fourth hole with described air outlet.

Particularly, described air-inlet cavity and described outlet chamber are connected by the communicating passage be limited between described upper cover and described valve seat, and described communicating passage extends along curve.

Additional aspect of the present utility model and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present utility model.

Accompanying drawing explanation

Fig. 1 is the explosive view of the air pump according to the utility model embodiment;

Fig. 2 is the stereogram of the air pump shown in Fig. 1;

Fig. 3 is the sectional drawing of the air pump shown in Fig. 2;

Fig. 4 is the stereogram of the valve seat shown in Fig. 1;

Fig. 5 is the plan view of the valve seat shown in Fig. 4;

Fig. 6 is the worm's eye view of the valve seat shown in Fig. 5;

Fig. 7 is the stereogram of the upper cover shown in Fig. 1;

Fig. 8 is the plan view of the upper cover shown in Fig. 7;

Fig. 9 is the sectional drawing along A-A line in Fig. 8.

Reference character:

100: air pump;

1: upper cover; 11: air outlet; 12: the second air inlet ducts; 13: the second outgassing grooves;

15: second exhaust pipe; 151: the second holes;

2: valve seat; 21: the first air inlet ducts; 211: suction port; 212: positioning hole;

22: the first outgassing grooves;

23: downtake pipe; 231: the first holes; 232: the first intercommunicating pores;

3: valve block; 31: valve block portion; 32: positioning part; 321: place kick;

4: dividing plate; 41: internal partition portion; 411: the first internal partition portions; 412: the second internal partition portions;

42: external partition portion; 421: the first external partition portions; 422: the second external partition portions;

431: air inlet connecting port; 432: connecting port of giving vent to anger;

S: receiving cavity; S1: air-inlet cavity; S2: outlet chamber;

S3: communicating passage; S31: bottom surface; S32: end face;

S4: exhaust passage; S41: the first subchannel; S42: the second subchannel.

Embodiment

Be described below in detail embodiment of the present utility model, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the utility model, and can not be interpreted as restriction of the present utility model.

Disclosing hereafter provides many different embodiments or example is used for realizing different structure of the present utility model.Of the present utility model open in order to simplify, hereinafter the parts of specific examples and setting are described.Certainly, they are only example, and object does not lie in restriction the utility model.In addition, the utility model can in different example repeat reference numerals and/or letter.This repetition is to simplify and clearly object, itself does not indicate the relation between discussed various embodiment and/or setting.In addition, the various specific technique that the utility model provides and the example of material, but those of ordinary skill in the art can recognize the property of can be applicable to of other techniques and/or the use of other materials.

The air pump 100 executing example according to the utility model is described below with reference to Fig. 1-Fig. 9.

As shown in Figure 1-Figure 3, according to the air pump 100 of the utility model embodiment, comprising: upper cover 1, valve seat 2 and valve block 3.

Particularly, with reference to Fig. 1 and Fig. 3, upper cover 1 is formed with air outlet 11, valve seat 2 is located at the bottom of upper cover 1, valve seat 2 is formed with suction port 211, air-inlet cavity S1 and outlet chamber S2 is limited between valve seat 2 and upper cover 1, wherein, air-inlet cavity S1 is communicated with suction port 211, and outlet chamber S2 is connected by exhaust passage S4 with air outlet 11, air-inlet cavity S1 can be communicated with by communicating passage S3 with outlet chamber S2, and valve block 3 is located at suction port 211 movably and sentences opening and closing suction port 211.

Here, it should be noted that, " suction port 211 " is only for the air inlet of valve seat 2, but not the suction port of hint air pump 100 entirety, " air outlet 11 " giving vent to anger only for upper cover 2, but not the air outlet of hint air pump 100 entirety.

As shown in figures 1 and 3, upper cover 1 is suitable for covering the top at valve seat 2, and upper cover 1 and valve seat 2 limit air-inlet cavity S1, outlet chamber S2 jointly.In addition, communicating passage S3 is limited between upper cover 1 and valve seat 2, gas such as air can flow in the air-inlet cavity S1 in valve seat 2 from suction port 211, then flow in communicating passage S3 from air-inlet cavity S1, then flow in outlet chamber S2 from communicating passage S3, then flow in the S4 of exhaust passage from outlet chamber S2, finally discharge upper cover 1 from air outlet 11.

Thus, gas, from entering valve seat 2 to the process leaving upper cover 1, needs to flow through air-inlet cavity S1, outlet chamber S2 and exhaust passage S4 in turn, thus extends the flow path of gas, add noise losses, and then significantly reduce the flow noise of gas and the overall noise of air pump 100.

Preferably, exhaust passage S4 and communicating passage S3 can extend along curve respectively, thus can extend the flow path with gas further, reduces the flow noise of gas further.

In addition, it should be noted that, the operation of other configuration examples as air bag (scheming not shown) etc. and air pump 100 according to the air pump 100 of the utility model embodiment is all known for those of ordinary skills, is not described in detail here.

According to the air pump 100 of the utility model embodiment, by arranging exhaust passage S4 between outlet chamber S2 and air outlet 11, thus significantly reducing the operating noise of air pump 100, improve the quality of product.

In an embodiment of the present utility model, limit receiving cavity S between valve seat 2 and upper cover 1, be provided with dividing plate 4 in receiving cavity S so that receiving cavity S is separated into air-inlet cavity S1 and outlet chamber S2, wherein communicating passage S3 is arranged around receiving cavity S.Further, the top of valve seat 2 is formed with the first outgassing groove 22, and the bottom of upper cover 1 is formed with the second outgassing groove 13, first outgassing groove 22 and the second outgassing groove 13 limits outlet chamber S2 jointly.Wherein, valve seat 2 can be linked together by ultrasonic wave fusion techniques with the surface of contact of upper cover 1.

In an embodiment of the present utility model, with reference to Fig. 3, Fig. 4 and Fig. 7, valve seat 2 is provided with the downtake pipe 23 upwards extended, upper cover 1 is provided with the second exhaust pipe 15 to downward-extension, downtake pipe 23 coordinates to limit exhaust passage S4 with second exhaust pipe 15, the two ends of exhaust passage S4 are communicated with air outlet 11 with outlet chamber S2 respectively, wherein, the two ends of exhaust passage S4 are respectively entrance point and outlet end, wherein entrance point is connected with outlet chamber S2, outlet end is connected with air outlet 11, gas in outlet chamber S2 can enter in the S4 of exhaust passage from the entrance point of exhaust passage S4, then flow along exhaust passage S4, outlet end finally by exhaust passage S4 discharges upper cover 1 from air outlet 11.

Wherein, as shown in Figure 3, the volume of exhaust passage S4 is less than the volume of outlet chamber S2.Thus, by arranging exhaust passage S4, gas can be drained into from the outlet chamber S2 that volume is larger in the less exhaust passage S4 of volume, effectively to change flow velocity and the pressure of gas, thus can reduce exhaust sound further.

Further, second exhaust pipe 15 stretches in downtake pipe 23, and the outer wall of second exhaust pipe 15 and the inwall of downtake pipe 23 are spaced apart from each other to limit exhaust passage S4.With reference to Fig. 3, downtake pipe 23 is formed with the first hole 231, first hole 231 can be blind hole, and the first hole 231 can be recessed into straight down from the roof of downtake pipe 23, second exhaust pipe 15 being formed with the second hole 151, hole 151, second can be through hole or blind hole, when the second hole 151 is through hole, the open bottom end of second exhaust pipe 15, when the second hole 151 is blind hole, the bottom of second exhaust pipe 15 is sealed end.

As shown in Figure 3, after upper cover 1 to coordinate with valve seat 2 and puts in place, second exhaust pipe 15 stretches in the first hole 231 downwards, the diameter in the first hole 231 is greater than the external diameter of second exhaust pipe 15, thus the perisporium in the periphery wall of second exhaust pipe 15 and the first hole 231 is spaced apart from each other, now, exhaust passage S4 can comprise the first subchannel S41 and the second subchannel S42 that communicate with each other, first subchannel S41 is the gap between second exhaust pipe 15 and the first hole 231, second subchannel S42 is the second hole 151, now the top open ports of the second subchannel S42 is the air outlet 11 of upper cover 1.

Particularly, the top of downtake pipe 23 is provided with at least one first intercommunicating pore 232 and is communicated with outlet chamber S2 for by exhaust passage S4.Such as in the example of Fig. 4-Fig. 6, first intercommunicating pore 232 runs through the top of downtake pipe 23 along inward-outward direction, and the first intercommunicating pore 232 can also recessedly downwards from the top of downtake pipe 23 form, thus the inner of the first intercommunicating pore 232 is connected with the first subchannel S41, the outer end of the first intercommunicating pore 232 is connected with outlet chamber S2, like this, with reference to Fig. 3, the gas in outlet chamber S2 can be entered in the first subchannel S41 by the first intercommunicating pore 232.

Alternatively, with reference to Fig. 5, first intercommunicating pore 232 be two and two the first intercommunicating pores 232 along downtake pipe 23 diametrically, that is, two the first intercommunicating pores 232 can in the circumference of downtake pipe 23 180 °, interval layout, thus flow in the S4 of exhaust passage while the gas uniform in outlet chamber S2 can be ensured, and exhaust efficiency can be improved.Certainly, the utility model is not limited thereto, and the structure of the first intercommunicating pore 232, quantity and distributing position can also be arranged according to actual requirement, to meet actual requirement better.

When one end stretching into downtake pipe 23 of second exhaust pipe 15 is open end, open end extends along the direction of air outlet 11 to be connected with air outlet 11, now, second hole 151 is along the direction (flow direction of namely giving vent to anger of air outlet, above-below direction such as shown in Fig. 3) run through second exhaust pipe 15, and the diapire in the lower end of second exhaust pipe 15 and the first hole 231 separates between the upper and lower, now the open ports of the bottom in the second hole 151 can be understood as the open bottom end end of second exhaust pipe 15, the open ports at the top in the second hole 151 can be understood as the air outlet 11 of upper cover 1, and the top in the second hole 151 is the outlet end of exhaust passage S4.Thus, the gas entered in the first subchannel S41 can enter in the second subchannel S42 by the open end of second exhaust pipe, then discharges upper cover 1 from the air outlet 11 at the second subchannel S42 top.Wherein, the arrow shown in Fig. 4 and Fig. 5 is used to indicate the flow direction of gas.

(scheme not shown) when one end stretching into downtake pipe 23 of second exhaust pipe 15 is sealed end, the perisporium of second exhaust pipe 15 is provided with at least one second intercommunicating pore to be communicated with air outlet 11 by exhaust passage S4.Second intercommunicating pore runs through the bottom perisporium of second exhaust pipe along inward-outward direction, thus the inner of the second intercommunicating pore is connected with the second subchannel S42, the outer end of the second intercommunicating pore is connected with the first subchannel S41, like this, with reference to Fig. 3, the gas entered in the first subchannel S41 can enter in the second subchannel S42 by the second intercommunicating pore, then discharges upper cover 1 from the air outlet 11 at the second subchannel S42 top.Wherein, the arrow shown in Fig. 4 and Fig. 5 is used to indicate the flow direction of gas.

Second intercommunicating pore be two and two the second intercommunicating pores along second exhaust pipe 15 diametrically.With reference to Fig. 5, two the second intercommunicating pores can in the circumference of second exhaust pipe 15 180 °, interval layout, thus flow in the second subchannel S42 while the gas uniform in the first subchannel S41 can be ensured, to improve exhaust efficiency.Certainly, the utility model is not limited thereto, and the structure of the second intercommunicating pore, quantity and distributing position can also be arranged according to actual requirement, to meet actual requirement better.

Like this, because the first intercommunicating pore 232 is located at the top of downtake pipe 23, second intercommunicating pore is located at the bottom of second exhaust pipe 15, and downtake pipe 23 is substantially concordant with the top of second exhaust pipe 15, downtake pipe 23 is also substantially concordant with the bottom of second exhaust pipe 15, thus the first intercommunicating pore 232 and the second intercommunicating pore are in the axially interlaced arrangement of downtake pipe 23 or second exhaust pipe 15, preferably, first intercommunicating pore 232 and the second intercommunicating pore 152 are crisscross arranged in the radial direction of downtake pipe 23 or second exhaust pipe 15, that is, first intercommunicating pore 232 and the projection of the second intercommunicating pore in the plane (horizontal plane such as shown in Fig. 3) perpendicular to downtake pipe 23 or second exhaust pipe 15 bearing of trend are spaced apart from each other, thus the length of exhaust passage S4 can be extended further, effectively to reduce exhaust sound.

In addition, it should be noted that, when one end stretching into downtake pipe 23 of second exhaust pipe 15 is sealed end, one end that second exhaust pipe 15 stretches into downtake pipe 23 can be fixed on the bottom surface of downtake pipe 23, such as, the lower end of second exhaust pipe 15 can be linked together by ultrasonic wave fusion techniques with the diapire in the first hole 231.Thus, the length of exhaust passage S4 can be extended, reduce exhaust sound further.

Certainly, the utility model is not limited thereto, and downtake pipe 23 can also stretch in second exhaust pipe 15, after the technological scheme of those skilled in the art on read, obviously be appreciated that downtake pipe 23 stretches into the technological scheme in second exhaust pipe 15, no longer describe in detail here.

(this embodiment not shown is schemed) in an embodiment of the present utility model, the top of valve seat is formed with the 3rd recessed outgassing groove downwards, 3rd outgassing groove and upper cover limit outlet chamber jointly, on cover the 3rd outlet pipe be provided with to downward-extension, 3rd outlet pipe stretches into downwards in outlet chamber, and the periphery wall of the 3rd outlet pipe and the inner circle wall of outlet chamber are spaced apart from each other, 3rd outlet pipe can be formed with the 3rd hole extended along the vertical direction, 3rd hole can be through hole or blind hole, when the 3rd hole is through hole, top and the bottom in the 3rd hole are opened wide respectively, and the lower end of the 3rd outlet pipe can separate between the upper and lower with the diapire of the 3rd outgassing groove, now the bottom in the 3rd hole can be understood as third through-hole, the top in the 3rd hole can be understood as air outlet, thus outlet chamber can be connected with the 3rd hole by third through-hole with air outlet, when the 3rd hole is blind hole, the lower end of the 3rd outlet pipe can be fixedly linked with the diapire of the 3rd outgassing groove, now, the open top in the 3rd hole, bottom end seal, third through-hole can run through the perisporium of the lower end of the 3rd outlet pipe, the top in the 3rd hole can be understood as air outlet, outlet chamber can be connected with the 3rd hole by third through-hole with air outlet.

(this embodiment not shown is schemed) in another embodiment of the present utility model, the bottom of upper cover is formed with the 4th outgassing groove to being recessed on, 4th outgassing groove and valve seat limit outlet chamber jointly, air outlet runs through the roof of upper cover and the 4th outgassing groove along the vertical direction, valve seat is provided with the 4th outlet pipe upwards extended, 4th outlet pipe stretches in outlet chamber and the periphery wall of the 4th outlet pipe and the inner circle wall of outlet chamber are spaced apart from each other, 4th outlet pipe can be formed with the 4th hole extended along the vertical direction, 4th hole is blind hole, the open top in the 4th hole, when the upper end of the 4th outlet pipe and the roof of the 4th outgassing groove separate between the upper and lower, the top in the 4th hole can directly be connected with air outlet, thus the effect of buffer gas flow can be played in the 4th hole, when the upper end of the 4th outlet pipe and the roof of the 4th outgassing groove are fixedly linked, fourth hole can run through the perisporium of the upper end of the 4th outlet pipe, outlet chamber can be connected with the 4th hole by fourth hole with air outlet.

Further, with reference to Fig. 3, Fig. 4 and Fig. 7, dividing plate 4 comprises internal partition portion 41 and external partition portion 42 further, wherein, external partition portion 42 can be connected with internal partition portion 41, and external partition portion 42 is looped around the outside in internal partition portion 41, communicating passage S3 is positioned at the outside in external partition portion 42, receiving cavity S is positioned at the inner side in external partition portion 42, receiving cavity S is separated into air-inlet cavity S1 and outlet chamber S2 by internal partition portion 41, wherein outlet chamber S2 is positioned at the inner side in internal partition portion 41, and air-inlet cavity S1 is positioned at the outside in internal partition portion 41.

Wherein, as shown in Figure 3, internal partition portion 41 can be docked by the first internal partition portion 411 be located on upper cover 1 and the second internal partition portion about 412 be located on valve seat 2 and form, and external partition portion 42 can be docked by the first external partition portion 421 be located on upper cover 1 and the second external partition portion about 422 be located on valve seat 2 and form.In addition, it should be noted that, can have coaxial central axis after valve seat 2 and upper cover 1 assemble, wherein, " inner side " can be understood as the side towards central axis, and its contrary side is defined as in " outside ", namely away from the side of central axis.

Particularly, with reference to Fig. 3, Fig. 4 and Fig. 7, after upper cover 1 and valve seat 2 are seated, the bottom surface S32 being looped around receiving cavity S outer rim of upper cover 1, to separate between the upper and lower with the end face S31 being looped around receiving cavity S outer rim of valve seat 2, thus the sidewall of dividing plate 4 limits communicating passage S3 jointly with end face S31, bottom surface S32 respectively.

The sidewall of receiving cavity S is formed with air inlet connecting port 431 and connecting port 432 of giving vent to anger, air-inlet cavity S1 is communicated with communicating passage S3 by air inlet connecting port 431, and communicating passage S3 is communicated with outlet chamber S2 by connecting port 432 of giving vent to anger.As shown in Figure 4 and Figure 5, air inlet connecting port 431 can run through the joint in internal partition portion 41 and external partition portion 42, thus the gas in air-inlet cavity S1 can flow in communicating passage S3 by air inlet connecting port 431, connecting port 432 of giving vent to anger can run through external partition portion 42, thus the gas in communicating passage S3 can be entered in outlet chamber S2 by connecting port 432 of giving vent to anger.

Particularly, the top of valve seat 2 is formed with the first air inlet duct 21, and the bottom of upper cover 1 is formed with the second air inlet duct 12, first air inlet duct 21 and the second air inlet duct 12 limits air-inlet cavity S1 jointly.As shown in Fig. 3, Fig. 4 and Fig. 7, first air inlet duct 21 forms from the upper-end surface of valve seat 2 is recessed downwards, second air inlet duct 12 forms from the lower end surface of upper cover 1 to being recessed on, after upper cover 1 and valve seat 2 are seated, first air inlet duct 21 and the second air inlet duct about 12 just to and jointly limit air-inlet cavity S1, now, the periphery wall in internal partition portion 41 can be understood as the perisporium of air-inlet cavity S1.

Further, suction port 211 is formed on the diapire of the first air inlet duct 21, the diapire of the first air inlet duct 21 is formed with the isolated positioning hole 212 with suction port 211.Alternatively, suction port 211 is that multiple and multiple suction port 211 is spaced apart along the circumference of positioning hole 212.Such as in the example of fig. 4, the center of the diapire of the first air inlet duct 21 is formed with a positioning hole 212, positioning hole 212 can be configured to circular hole, and run through the diapire of the first air inlet duct 21 along the vertical direction, the circumference of positioning hole 212 is distributed with equably the diapire that three suction ports, 211, three suction ports 211 also run through the first air inlet duct 21 respectively along the vertical direction.

Correspondingly, with reference to Fig. 1 and Fig. 3, valve block 3 comprises valve block portion 31 and positioning part 32, and valve block portion 31 is connected to the upper end of positioning part 32 and is positioned at air-inlet cavity S1, and the lower end of positioning part 32 coordinates with positioning hole 212, and valve block portion 31 covers on suction port 211.Particularly, valve block portion 31 can be constructed generally as the lamellar body with arc surface, and the center in valve block portion 31 is protruded towards the direction of upper cover 1, and the shape of cross section in valve block portion 31, size respectively with the shape of cross section of the first air inlet duct 21, measure-alike, thus three suction ports 211 can cover by valve block portion 31 completely.

Further, with reference to Fig. 1 and Fig. 3, positioning part 32 extends straight down from the lower end surface in valve block portion 31, and the bottom of positioning part 32 has the place kick 321 of spheroidal substantially, herein, when valve block 3 moves between an open position and a closed, only have valve block portion 31 to perform and open and close action, positioning part 32 maintains static all the time.

As shown in Figure 3, air pump 100 work process in, gas such as air, bottom-uply can enter suction port 211, upwards to be backed down in valve block portion 31, gas can be entered in air-inlet cavity S1.Wherein, the quantity of suction port 211 and shape can also be arranged according to actual requirement, to meet actual requirement better.In addition, the arrow shown in Fig. 3, Fig. 4, Fig. 5, Fig. 9 is used to indicate the flow direction of gas.

Wherein, air-inlet cavity S1 can be multiple and multiple air-inlet cavity S1 circumferentially spaced apart distribution.Such as in the example of fig. 1, upper cover 1 and valve seat 2 limit three air-inlet cavity S1 jointly, and three air-inlet cavity S1 are evenly distributed in the circumference of central axis, and the structure of each air-inlet cavity S1 is all identical, now internal partition portion 41 is also three, and the structure in three internal partition portions 41 is also identical.Certainly, the utility model is not limited thereto, and the structure of air-inlet cavity S1 and quantity can also be arranged according to actual requirement, to meet actual requirement better.

As shown in figs. 4 and 7, the diapire of the first air inlet duct 21 is higher than the diapire of the first outgassing groove 22, the roof of the second air inlet duct 12 is concordant with the roof of the second outgassing groove 13, that is, the degree of depth that first air inlet duct 21 is recessed into downwards is less than the recessed degree of depth of the first outgassing groove 22 downwards, and the second air inlet duct 12 equals the second outgassing groove 13 to the degree of depth be recessed on to the degree of depth be recessed on, thus air-inlet cavity S1 height is in the vertical direction less than outlet chamber S2 height in the vertical direction, to ensure that the space of outlet chamber S2 can be comparatively large, improve noise reduction further.

The exhaust work process of the air pump 100 according to the utility model embodiment is briefly described referring to Fig. 3-Fig. 5.

When air pump 100 is vented, the valve block 3 covered on suction port 211 is upwards backed down, first gas enter in air-inlet cavity S1, then enter in bending communicating passage S3 by air inlet connecting port 431, then the gas in communicating passage S3 is discharged in outlet chamber S2 along connecting port 432 of giving vent to anger, then the gas in outlet chamber S2 can enter in the first subchannel S41 of exhaust passage S4 by the first intercommunicating pore 232, flow to the second subchannel S42 from the first subchannel S41 again, finally discharge from the air outlet 11 of upper cover 1.

Thus, not only gas long but also complicated to the flow path flowing out upper cover 1 from entering valve seat 2, and gas can replace flowing in large and small chamber, thus effectively can change flow velocity and the pressure of gas, to realize noise reduction effectively.

In description of the present utility model, it will be appreciated that, orientation or the position relationship of the instruction such as term " " center ", " on ", D score, " vertically ", " level ", " top ", " end ", " interior ", " outward ", " axis ", " radial direction ", " circumference " they be based on orientation shown in the drawings or position relationship; be only the utility model and simplified characterization for convenience of description; instead of instruction or imply the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as restriction of the present utility model.

In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristics.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise one or more these features.In description of the present utility model, the implication of " multiple " is two or more, unless otherwise expressly limited specifically.

In the utility model, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or integral; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements.For the ordinary skill in the art, the concrete meaning of above-mentioned term in the utility model can be understood as the case may be.

In the utility model, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary mediate contact.And, fisrt feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " can be fisrt feature immediately below second feature or tiltedly below, or only represent that fisrt feature level height is less than second feature.

In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present utility model or example.In this manual, to the schematic representation of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in one or more embodiment in office or example in an appropriate manner.In addition, when not conflicting, the feature of the different embodiment described in this specification or example and different embodiment or example can carry out combining and combining by those skilled in the art.

Although illustrate and described embodiment of the present utility model, those having ordinary skill in the art will appreciate that: can carry out multiple change, amendment, replacement and modification to these embodiments when not departing from principle of the present utility model and aim, scope of the present utility model is by claim and equivalents thereof.

Claims (10)

1. an air pump, is characterized in that, comprising:

Upper cover, covers on described and is formed with air outlet;

Valve seat, described valve seat is located at the bottom of described upper cover, described valve seat is formed with suction port, the air-inlet cavity communicated with each other and outlet chamber is limited between described valve seat and described upper cover, described air-inlet cavity is communicated with described suction port, and described outlet chamber is communicated with by the exhaust passage be limited between described upper cover and described valve seat with described air outlet; And

Valve block, described valve block is located at described suction port movably and sentences the described suction port of opening and closing.

2. air pump according to claim 1, it is characterized in that, described valve seat is provided with the downtake pipe upwards extended, the second exhaust pipe be provided with to downward-extension is covered on described, described downtake pipe coordinates to limit exhaust passage with described second exhaust pipe, and the two ends of described exhaust passage are communicated with described air outlet with described outlet chamber respectively.

3. air pump according to claim 2, is characterized in that, described second exhaust pipe stretches in described downtake pipe, and the outer wall of described second exhaust pipe and the inwall of described downtake pipe are spaced apart from each other to limit described exhaust passage.

4. air pump according to claim 3, it is characterized in that, the top of described downtake pipe is provided with at least one first intercommunicating pore to be communicated with described outlet chamber described exhaust passage, and the open bottom end of described second exhaust pipe and the direction along described air outlet extend.

5. air pump according to claim 4, is characterized in that, described first intercommunicating pore be two and described two the first intercommunicating pores along described downtake pipe diametrically.

6. air pump according to claim 2, it is characterized in that, the top of described downtake pipe is provided with at least one first intercommunicating pore to be communicated with described outlet chamber described exhaust passage, one end that described second exhaust pipe stretches into described downtake pipe is sealed end, and the perisporium of described second exhaust pipe is provided with at least one second intercommunicating pore to be communicated with described air outlet described exhaust passage.

7. air pump according to claim 6, it is characterized in that, one end that described second exhaust pipe stretches into described downtake pipe is fixed on the bottom surface of described downtake pipe, described second intercommunicating pore be two and described two the second intercommunicating pores along described second exhaust pipe diametrically, described first intercommunicating pore and described second intercommunicating pore radial direction are crisscross arranged.

8. air pump according to claim 1, it is characterized in that, the top of described valve seat is formed with the 3rd recessed outgassing groove downwards, described 3rd outgassing groove and described upper cover limit described outlet chamber jointly, the 3rd outlet pipe be provided with to downward-extension is covered on described, described 3rd outlet pipe is provided with at least one third through-hole, and described outlet chamber is communicated with by described third through-hole with described air outlet.

9. air pump according to claim 1, it is characterized in that, the bottom of described upper cover is formed with the 4th outgassing groove to being recessed on, described 4th outgassing groove and described valve seat limit described outlet chamber jointly, described valve seat is provided with the 4th outlet pipe upwards extended, described 4th outlet pipe is provided with at least one fourth hole, and described outlet chamber is communicated with by described fourth hole with described air outlet.

10. the air pump according to any one of claim 1-9, is characterized in that, described air-inlet cavity and described outlet chamber are connected by the communicating passage be limited between described upper cover and described valve seat, and described communicating passage extends along curve.