CN101605993B - Oscillating piston type reciprocating compressor - Google Patents

Abstract

The present invention realizes a smaller and light reciprocating compressor with higher efficiency and longer life time, producing lower noise and less vibration. A reciprocating compressor 1 includes: a motor having a motor shaft 2s; four cylinders provided in a direction perpendicular to an axial direction of the motor shaft 2s; and four pistons 5 each having a piston head part 5h and a rod part 5R formed integrally, the piston head part 5h fitting into a corresponding one of the four cylinders 4 in a reciprocable fashion, and the rod part 5R being rotatably installed to an eccentric shaft 17 fixed to the motor shaft 2s.

Description

Reciprocating compressor and oxygen concentrating device

Technical field

The oxygen concentrating device that the present invention relates to have the reciprocating compressor of four cylinders and have this reciprocating compressor.

Background technique

An example of the small-sized piston pump that in existing oxygen concentrator etc., uses is disclosed in the patent documentation 1.Patent documentation 1 disclosed pump is two hair style reciprocating compressors with two cylinders, comprising: the motor with driving shaft (motor reel); Along with two cylinders of the direction configuration of the axle direction quadrature of driving shaft; And two pistons that are formed with piston crown and bar portion respectively, wherein, above-mentioned piston crown can be entrenched in to to-and-fro motion on each of two cylinders, and above-mentioned bar portion can be entrenched on the eccentric shaft that is fixed on the motor reel rotatably.In this two hair styles reciprocating compressor, the piston crown of two pistons carries out the air-breathing compression stroke in the pressing chamber in the cylinder respectively in the phase difference of keeping 180 degree.

Patent documentation 1: TOHKEMY 2004-211708 communique

Summary of the invention

But; In two hair style reciprocating compressors of above-mentioned patent documentation 1; When making performance not descend, specifically when keeping rotating speed and ejection flow, make piston rod 5P (with reference to Figure 28 (b)) less when reaching miniaturization; It is big that the angle of oscillation θ of piston (with reference to Figure 28 (a)) becomes, and has the bubble-tight problem that is difficult to guarantee pressing chamber.In addition, because the angle of oscillation of piston becomes big, the sliding distance of the piston crown of piston also becomes greatly, therefore, exists the sealed member that is installed in piston crown can wear and tear the problem that life of product is shortened in advance.

So, the purpose of this invention is to provide a kind of reciprocating compressor that can realize high efficiency, long lifetime, miniaturization and and low noise, low vibration, and the oxygen concentrating device with this reciprocating compressor.

The reciprocating compressor of first invention is characterised in that! Comprise: motor with motor reel; Along with 4 cylinders of the direction configuration of the axle direction quadrature of above-mentioned motor reel; Be formed with 4 pistons of piston crown and bar portion respectively, above-mentioned piston crown can be entrenched in to to-and-fro motion on each of above-mentioned 4 cylinders, and above-mentioned bar portion can be entrenched on the eccentric shaft that is fixed on the above-mentioned motor reel rotatably.

In this reciprocating compressor, through the number of cylinder is increased to 4 from 2, can in the rotating speed that keeps each piston and whole ejection flow, stroke be shortened, therefore,, also can keep the pendulum angle of piston even piston rod shortens.Thus, can guarantee the tightness of pressing chamber and the miniaturization of realization compressor.In addition, because stroke is shortened, the swinging distance of piston crown is diminished, therefore, can guarantee to be configured in the sealing of the sealed member of piston crown for a long time.And, be 4 through making cylinder, heat diffusion area significantly enlarges, and the temperature that can suppress pressing chamber rises, and can significantly improve compression efficiency.

The reciprocating compressor of second invention is characterised in that; In the reciprocating compressor of first invention; Above-mentioned 4 cylinders are: when overlooking, be configured in 2 cylinders on the straight line at the center through above-mentioned motor reel and be configured in 2 cylinders on the straight line with above-mentioned straight line quadrature and the center through above-mentioned motor reel.

In this reciprocating compressor; When overlooking, on the straight line at the center through motor reel and with the straight line at this straight line quadrature and the center through motor reel on, dispose 2 cylinders respectively; Thereby, whole interval of two adjacent in a circumferential direction cylinders is diminished.In addition, between the piston crown of two adjacent pistons, be difficult to produce and interfere, therefore, piston rod is further shortened.Thereby, can realize the further miniaturization of compressor.

The reciprocating compressor of the 3rd invention is characterised in that in the reciprocating compressor of first or second invention, the piston crown of above-mentioned 4 pistons carries out air-breathing compression stroke respectively in the phase difference of keeping 90 degree.

In this reciprocating compressor; The air-breathing compression stroke of 4 pistons is carried out in the phase difference of keeping 90 degree respectively; Thereby when compression stroke, the power of the piston crown that is applied to 4 pistons is cancelled out each other, suppress the change of the torque of motor reel.Can significantly improve compression efficiency thus.In addition, also cancel out each other, can realize low noise and low vibrationization from the suction aspirant that 4 pressing chambers produce.

The reciprocating compressor of the 4th invention is characterised in that in the reciprocating compressor of any invention the first～three, above-mentioned eccentric shaft is 1.

In this reciprocating compressor, be 1 through making four chimeric eccentric shafts of piston, the interval of the bar portion of the axial piston of motor is diminished.In addition, the masterpiece in the time of can the compression stroke from certain piston being transferred to suction stroke transmits for the power that helps other piston motion effectively, therefore, can reduce the transmission loss of power.Thereby can further improve compression efficiency.

The reciprocating compressor of the 5th invention is characterised in that; In the reciprocating compressor of any invention the first～four; Has the housing of taking in above-mentioned motor reel; Be formed with first positioning part at above-mentioned housing, above-mentioned four cylinders be formed with respectively with second positioning part of above-mentioned first positioning part corresponding mode configuration, above-mentioned four cylinders; Position by above-mentioned first positioning part and above-mentioned second positioning part for above-mentioned housing, make that each each the center of piston crown of axle center and above-mentioned 4 pistons of above-mentioned 4 cylinders is consistent.

In this reciprocating compressor; Housing has first positioning part; 4 cylinders have second positioning part corresponding with first positioning part respectively, thereby can be for housing each location with 4 cylinders, make that each the center of piston crown of axle center and piston of 4 cylinders is consistent; The eccentric wear that therefore, can suppress sealed member.

The reciprocating compressor of the 6th invention is characterised in that; In the reciprocating compressor of any invention the first～five; At the axle direction of above-mentioned motor reel, between the bar portion of above-mentioned 4 pistons, dispose the adjustment component of the position that is used to adjust above-mentioned bar portion.

In this reciprocating compressor, at the axle direction of motor, between the bar portion of 4 pistons, dispose adjustment component, thus position that can regulating lever portion.So, can make the axle center of cylinder accurately consistent with the axle center of the piston crown of piston, therefore can suppress the eccentric wear of sealed member.

The reciprocating compressor of the 7th invention is characterised in that; In the reciprocating compressor of any invention the first～six; Above-mentioned four cylinders have: be fixed on the tabular plat part of an end of aforementioned body portion along above-mentioned cylinder axial cylindrical main body portion with through bolt, between aforementioned body portion and above-mentioned plat part, clip elastic member.

In this reciprocating compressor; Between each main part and plat part of 4 cylinders, clip elastic member; Thereby only through based on linking the adjusting that main part and the torque of the bolt of plat part are managed, each the piston crown that promptly can make 4 pistons is in upper dead center and gap smaller cylinder.Thereby can make the stable performance of compressor, can further improve compression efficiency.

The reciprocating compressor of the 8th invention is characterised in that, in the reciprocating compressor of any invention the first～seven, between above-mentioned piston crown and the pressing plate that is fixed through bolt, clips the rubber-like Spacer.

In this reciprocating compressor; Through between each piston crown and pressing plate of 4 pistons, clipping Spacer; Thereby only through based on linking the adjusting that piston crown and the torque of the bolt of pressing plate are managed, each the piston crown that promptly can make 4 pistons is in upper dead center and gap smaller cylinder.Thereby can make the stable performance of compressor, can further improve compression efficiency.

The reciprocating compressor of the 9th invention is characterised in that, in the reciprocating compressor of any invention the first～eight, comprising: the housing of taking in above-mentioned motor reel; Be connected with each inside of above-mentioned 4 cylinders and make the fluid can be at a plurality of suction passages of internal circulation; Be connected with each inside of above-mentioned 4 cylinders and make the fluid can be at a plurality of discharge streams of internal circulation; And be used for converging converging suction passage and being used to converge the arbitrary at least side who discharges stream of above-mentioned a plurality of discharge streams of above-mentioned a plurality of suction passages, above-mentionedly converge suction passage and above-mentionedly converge the arbitrary at least side who discharges in the stream and be configured to axial axle zone overlapping with the arbitrary at least side in its neighboring area along above-mentioned motor reel.

In this reciprocating compressor, converge suction passage and converge the arbitrary at least side who discharges in the stream through setting, can converge the stream between a plurality of cylinders.In addition; Converge suction passage with converge the arbitrary at least side who discharges in the stream be configured to axial axle zone along motor reel overlapping with the arbitrary at least side in its neighboring area, thereby the maximization of the compressor integral body that can suppress to cause owing to the setting that converges stream.As a result, utilize this structure, can when suppressing maximization, converge the stream between a plurality of cylinders.

In addition, here " overlapping " mean, converges to flow into stream or converge and discharge stream and be configured to include in the zone that is made up of axle zone and peripheral region.

The reciprocating compressor of the tenth invention is characterised in that, in the reciprocating compressor of the 9th invention, the above-mentioned suction passage and above-mentioned of converging converges and discharges arbitrary at least square in the stream to become with above-mentioned axle zone be the ring-type stream at center.

In this reciprocating compressor, to converge stream be the ring-type stream through making, and can concentrate stream compactly, can easily suppress to maximize.In addition, converge through for example making that to discharge stream be ring-type, can guarantee the heat diffusion area of liquid, can improve compression efficiency.

The reciprocating compressor of the 11 invention is characterised in that in the reciprocating compressor of the tenth invention, the above-mentioned discharge stream that converges that is formed above-mentioned ring-type stream forms along the planar ground expansion vertical with the axle direction of above-mentioned motor reel.

In this reciprocating compressor, can suppress by when converging the maximization of discharging the compressor that stream causes, easily guarantee to be used to improve the heat diffusion area of the fluid of compression efficiency.

The reciprocating compressor of the 12 invention is characterised in that; In the reciprocating compressor of the tenth or the 11 invention; The bearing support that also has the shaft end that is configured in above-mentioned motor reel, above-mentioned converging discharged stream and the above-mentioned arbitrary at least side who converges in the suction passage is formed on this bearing support.

In this reciprocating compressor, parts and its space on every side through effectively utilizing bearing supporting usefulness can suppress to maximize and converge the stream between a plurality of cylinders effectively.

The reciprocating compressor of the 13 invention is characterised in that in the reciprocating compressor of any invention the 9th～12, above-mentioned a plurality of discharge streams have axial first parallel portion along above-mentioned motor reel respectively.

In this reciprocating compressor, discharge stream and have axial part, thereby can dispose the discharge stream efficiently along motor reel.

The reciprocating compressor of the 14 invention is characterised in that in the reciprocating compressor of the 13 invention, above-mentioned first parallel portion is formed on the inside of above-mentioned housing.

In this reciprocating compressor; First parallel portion of discharging stream is formed on the inside of housing, waits the parts that are used to form stream thereby there is no need to be provided with in addition pipe, perhaps; The parts that are used to form stream that need to form are in addition tailed off; Therefore, can suppress when compressor maximizes components number to be tailed off, stream is discharged in configuration more efficiently.In addition, because housing self becomes radiating part,, can further improve compression efficiency so can significantly enlarge heat diffusion area.

In addition, usually form stream, thereby can when guaranteeing the function of housing, effectively utilize housing in the inside of the reinforcing part of the skeleton that becomes housing.

The reciprocating compressor of the 15 invention is characterised in that; In the reciprocating compressor of any invention the 9th～11; Above-mentioned motor has main part, and above-mentioned suction passage and the above-mentioned discharge stream that converges of converging is configured in the both sides that clip above-mentioned 4 cylinders on the axle direction of above-mentioned motor reel; The above-mentioned suction passage and above-mentioned of converging converges the shaft end side that the arbitrary side who discharges in the stream is configured in above-mentioned motor reel, and the opposing party is configured in aforementioned body portion side.

In this reciprocating compressor, can be when suppressing compressor and maximizing, configuration efficiently converge suction passage with converge discharge stream the two.In addition, converge suction passage and converge the discharge stream, can prevent further to improve compression efficiency in the transmission of heat between the two through isolation.

The reciprocating compressor of the 16 invention is characterised in that in the reciprocating compressor of the arbitrary invention the 9th～15, above-mentioned a plurality of suction passages have axial second parallel portion along above-mentioned motor reel respectively.

In this reciprocating compressor, suction passage has the axial part along motor reel, thereby can dispose suction passage efficiently.

The reciprocating compressor of the 17 invention is characterised in that; In the reciprocating compressor of any invention the 9th～16; Above-mentioned housing comprises first parts and second parts, and above-mentioned a plurality of discharge streams are formed the inside through above-mentioned first parts, and above-mentioned a plurality of suction passages are formed the inside through above-mentioned second parts; Above-mentioned first parts and above-mentioned second parts are independent respectively to be formed, and the pyroconductivity of above-mentioned second parts of the thermal conductivity ratio of above-mentioned first parts is high.

In this reciprocating compressor; With suction passage with discharge stream and be respectively formed at the independently inside of second parts and first parts; And first parts different with the pyroconductivity of second parts; Thereby can prevent that the heat of discharging stream from reaching suction passage, can further improve compression efficiency.

The reciprocating compressor of the 18 invention is characterised in that; In the reciprocating compressor of arbitrary invention the 9th～16; Above-mentioned a plurality of discharge stream has axial first parallel portion along above-mentioned motor reel respectively; Above-mentioned a plurality of suction passage has axial second parallel portion along above-mentioned motor reel respectively, and a pair of above-mentioned first parallel portion and a pair of above-mentioned second parallel portion are formed on the inside of above-mentioned housing, and it is mutually opposed that a pair of above-mentioned first parallel portion is configured to clip above-mentioned motor reel; And it is mutually opposed that a pair of above-mentioned second parallel portion is configured to clip above-mentioned motor reel.

In this reciprocating compressor; The two is formed on the inside of housing with second parallel portion of first parallel portion of discharging stream and suction passage; Thereby can effectively not use housing lavishly, can further suppress effectively to maximize and converge the stream between cylinder.

The reciprocating compressor of the 19 invention is characterised in that in the reciprocating compressor of any invention the 9th～18, above-mentioned a plurality of discharge streams have the tributary circuit along gravitational direction respectively, and dispose adhesive.

In this reciprocating compressor, the tributary circuit along gravitational direction is set on each of a plurality of drain passageways, on this discharge stream, apply adhesive, thereby can prevent the discharge of the abrasion powder of sealed member.

The reciprocating compressor of the 20 invention is characterised in that; In the reciprocating compressor of any invention first～19; Has the sealed member that is installed in above-mentioned piston crown; When above-mentioned 4 pistons are positioned at lower dead centre, be non-right angle with respect to the datum plane at the center of center that comprises above-mentioned motor reel and above-mentioned eccentric shaft along the sealing plane of above-mentioned sealed member.

In this reciprocating compressor; When above-mentioned piston is positioned at lower dead centre; Be non-right angle along the sealing plane of above-mentioned sealed member with respect to the datum plane at the center of center that comprises above-mentioned running shaft and eccentric shaft; Therefore, little in the time of can making sealing plane with respect to the low-load of the absolute value of the inclination on the plane vertical sealed member littler when the high load of the big sealed member of PV values such as compression stroke than the PV value of suction stroke etc. with the said reference plane.

Thereby, when above-mentioned sealed member is applied high load, the internal surface even contact of sealed member and cylinder; Can prevent the part abrasion of sealed member, realize the long lifetime, and; Can reduce the gap between cylinder and the sealed member, prevent air leakage, improve compression efficiency.

The reciprocating compressor of the 21 invention is characterised in that; In the reciprocating compressor of the 20 invention; When above-mentioned 4 pistons are positioned at lower dead centre, be non-right angle with respect to the said reference plane as the end face of the piston crown of above-mentioned 4 pistons of the above-mentioned sealing plane of above-mentioned sealed member.

In this reciprocating compressor; The end face of the piston crown of above-mentioned piston is the above-mentioned sealing plane of above-mentioned sealed member, and is little in the time of can making the high load of the tilt angle of the end face sealed member bigger than PV values such as compression strokes when low-loads such as suction stroke of piston crown of above-mentioned piston.

Thereby, make the internal surface even contact of above-mentioned sealed member and cylinder can prevent the part abrasion of sealed member, realize the long lifetime, and, can reduce the gap between cylinder and the sealed member, can prevent air leakage, improve compression efficiency.

The reciprocating compressor of the 22 invention is characterised in that; In the reciprocating compressor of the 20 or 21 inventions; When above-mentioned 4 pistons are positioned at lower dead centre; About the said reference plane, with the opposite side of movement direction at the center of above-mentioned eccentric shaft, above-mentioned sealing plane is acute angle with respect to the said reference plane.

In this reciprocating compressor, little in the time of can making sealing plane with respect to the low-load of the absolute value of the inclination on the plane vertical sealed member littler when the high load of the big sealed member of PV values such as compression stroke than PV values such as suction strokes with the said reference plane.

Thereby, can prevent the part abrasion of above-mentioned sealed member, realize the long lifetime, and, can reduce the gap between cylinder and the sealed member, can prevent air leakage, improve compression efficiency.

The reciprocating compressor of the 23 invention is characterised in that in the reciprocating compressor of the 21 invention, the part of above-mentioned sealed member is held and is fixed between the end face and pressing plate of piston crown of above-mentioned 4 pistons.

In this reciprocating compressor, utilize above-mentioned pressing plate, above-mentioned sealed member is installed in the end face of the piston crown of piston, therefore, can adjust the tilt angle of the end face of above-mentioned piston, set the inclination of sealing plane simply.

The reciprocating compressor of the 24 invention is characterised in that; In the reciprocating compressor of the 21 or 23 inventions; When above-mentioned 4 pistons are positioned at upper dead center, the end face almost parallel of the pressing chamber of the end face of the piston crown of above-mentioned 4 pistons and above-mentioned 4 cylinders.

In this reciprocating compressor; When above-mentioned piston is positioned at upper dead center; The end face almost parallel of the end face of the piston crown of above-mentioned piston and the pressing chamber of above-mentioned cylinder, therefore, at the upper dead center of piston; Dead band between the end face of the end face of the piston crown of above-mentioned piston and the pressing chamber of cylinder (dead space) diminishes, and can improve compression efficiency.

The reciprocating compressor of the 25 invention is characterised in that; In the reciprocating compressor of any invention the 20～24, above-mentioned sealing plane is medium and small in suction stroke with respect to absolute value ratio in compression stroke at the tilt angle on the plane vertical with the said reference plane.

In this reciprocating compressor, above-mentioned sealing plane is medium and small in suction stroke with respect to absolute value ratio in compression stroke at the tilt angle on the plane vertical with the said reference plane, therefore; The internal surface of sealed member and cylinder contacts substantially uniformly when the high load of sealed member, can prevent the part abrasion of sealed member, realizes the long lifetime; And; Can reduce the gap between cylinder and sealed member, prevent air leakage, improve compression efficiency.

The reciprocating compressor of the 26 invention is characterised in that; In the reciprocating compressor of any invention the 20～25; Become in the PV of sealed member value maximum above-mentioned motor reel angle of rotation near, above-mentioned sealing plane is rectangular with respect to the said reference plane.

In this reciprocating compressor, become in the PV of sealed member value maximum above-mentioned running shaft angle of rotation near, above-mentioned sealing plane is rectangular with respect to the said reference plane; At busy hour, the inclination of sealing plane disappears, and therefore can prevent the part abrasion of sealed member; Realize the long lifetime; And, can prevent air leakage, improve compression efficiency.

The reciprocating compressor of the 27 invention is characterised in that; In the reciprocating compressor of any invention first～26; Have the housing of taking in above-mentioned motor reel, comprising: the discharge gas flow path that is configured in the arbitrary at least side's in above-mentioned housing and above-mentioned 4 cylinders inside; Cooling is used suction port with the cooling that medium sucks the inside of above-mentioned discharge gas flow path; With discharge above-mentioned cooling from above-mentioned discharge gas flow path and use exhaust port with the cooling of medium.

In this reciprocating compressor; With cooling off with medium through discharging gas flow path from cooling guides to the inside of reciprocating compressor with suction port after; Be discharged to the outside from cooling with exhaust port, thereby can guarantee the airtight construction of reciprocating compressor, and the sealed member, bearing etc. of cooling reciprocating compressor; Thus; Can improve the sealed member of reciprocating compressor, the durability of bearing, and can suppress the temperature rising of pressing chamber, therefore can improve compression efficiency.

The oxygen concentrating device of the 28 invention is characterised in that, comprising: the reciprocating compressor of the 27 invention; Be supplied to by above-mentioned reciprocating compressor institute's air compressed and take in from this air the contactor of the sorbent of adsorption of nitrogen selectively; Take out the oxygen concentrated gas taking-up portion of oxygen concentrated gas in the above-mentioned contactor; The oxygen jar that the above-mentioned oxygen concentrated gas that from above-mentioned contactor, takes out through above-mentioned oxygen concentrated gas taking-up portion is stored; With the gas discharge section that the gas that will comprise through making in the above-mentioned contactor decompression nitrogen that breaks away from from above-mentioned sorbent is discharged in the above-mentioned contactor, above-mentioned cooling is the gas that comprises nitrogen of discharging from above-mentioned contactor through above-mentioned gas discharge portion with medium.

In this oxygen concentrating device, the gas that comprises nitrogen that will discharge from contactor through above-mentioned gas discharge portion guides to after the seal container inside of reciprocating compressor through discharging gas flow path; Discharge to the outside; Thereby can guarantee the airtight construction of reciprocating compressor, and sealed member, bearing etc. in the seal container of cooling reciprocating compressor, thus; Can improve the sealed member of reciprocating compressor, the durability of bearing; Energy-conservationization and quietization can be reached through the miniaturization of cooling fan, low rotationization, compression efficiency can be further improved, the decline of the oxygen concentration of anti-block concentrated gas.

In addition; Will be from the gas that comprises nitrogen of above-mentioned contactor discharge; Gas flow path guides to eccentric shaft and piston crown is discharged to the outside afterwards through discharging; Thereby can cool off eccentric shaft and piston crown in the seal container of reciprocating compressor, especially can improve the durability of the sealed member of the bearing that is installed in the eccentric shaft that is easy to generate high heat and piston crown.

As discussed above, can access following effect according to the present invention.

In the first～eight invention, through the number of cylinder is increased to 4 from 2, can in the rotating speed that keeps each piston and whole ejection flow, stroke be shortened, even therefore piston rod is shortened, also can keep the pendulum angle of piston.Thus, the tightness of pressing chamber can be guaranteed, and the miniaturization of compressor can be realized.In addition, shorten, the swinging distance of piston crown is diminished, therefore, can guarantee to be configured in the sealing of the sealed member of piston crown for a long time through making stroke.And, be 4 through making cylinder, heat diffusion area significantly enlarges, and the temperature that can suppress pressing chamber rises, and can significantly improve compression efficiency.And; 4 pressing chambers carry out air-breathing compression stroke in the phase difference of keeping 90 degree respectively, thus the power that is applied to motor reel cancel out each other, can suppress the change of torque; Can improve compression efficiency thus; In addition, the suction aspirant is also cancelled out each other, and therefore can realize low noise and low vibrationization.

In the 9th～19 invention, converge suction passage and converge the arbitrary at least side who discharges in the stream through setting, can converge the stream between a plurality of cylinders.In addition; Converge suction passage with converge the arbitrary at least side who discharges in the stream be configured to in the axial axle zone of motor reel and its neighboring area any is overlapping at least, thereby the maximization of the compressor integral body that can suppress to cause owing to the setting that converges stream.As a result, utilize this structure, can when suppressing maximization, converge the stream between a plurality of cylinders.

In the 20～26 invention; When above-mentioned piston is positioned at lower dead centre; Be non-right angle along the sealing plane of above-mentioned sealed member with respect to the datum plane at the center of center that comprises above-mentioned running shaft and eccentric shaft; Therefore, little in the time of can making sealing plane with respect to the low-load of the absolute value of the inclination on the plane vertical sealed member littler when the high load of big sealed member such as the PV value of compression stroke etc. than the PV value of suction stroke etc. with the said reference plane.Thereby, to the high load of above-mentioned sealed member the time, the internal surface even contact of sealed member and cylinder; Can prevent the part abrasion of sealed member, realize the long lifetime, and; Can reduce the gap between cylinder and the sealed member, can prevent air leakage, improve compression efficiency.

In the 27 and 28 inventions; With cooling with medium through discharging gas flow path from cooling guides to the inside of reciprocating compressor with suction port after, be discharged to the outside from cooling with exhaust port, thereby can guarantee the airtight construction of reciprocating compressor; And the sealed member of cooling reciprocating compressor, bearing etc.; Thus, can improve the sealed member of reciprocating compressor, the durability of bearing, improve compression efficiency; Energy-conservationization and quietization can be reached through the miniaturization of cooling fan, low rotationization, the decline of the oxygen concentration of block concentrated gas can be prevented.

Description of drawings

Fig. 1 is the three-dimensional synoptic diagram of the reciprocating compressor of expression first mode of execution of the present invention.

Fig. 2 is the synoptic diagram of the reciprocating compressor of Fig. 1, (a) is to overlook synoptic diagram, (b) be X to looking the side synoptic diagram, (c) be that Y is to looking the side synoptic diagram.

Fig. 3 is that the A-A of Fig. 2 (c) is to looking simplified schematic cross-sectional view.

Fig. 4 is that the B-B of Fig. 2 (a) is to looking simplified schematic cross-sectional view.

Fig. 5 is that the C-C of Fig. 2 (a) is to looking simplified schematic cross-sectional view.

Fig. 6 is that the D-D of Fig. 2 (c) is to looking simplified schematic cross-sectional view.

Fig. 7 is that the E-E of Fig. 3 is to looking simplified schematic cross-sectional view.

Fig. 8 is that the Z of Fig. 1 of expression reciprocating compressor is to looking approximate three-dimensional map.

Fig. 9 is the three-dimensional synoptic diagram of second parts of the housing of presentation graphs 1.

Figure 10 is the synoptic diagram of second parts of Fig. 9, (a) is the T-U-V compound section figure of (b), is to overlook synoptic diagram (b), (c) be X to looking the side synoptic diagram, (d) be Y to looking the side synoptic diagram, (e) be the J-J sectional view.

Figure 11 is the three-dimensional synoptic diagram of first parts of the housing of presentation graphs 1.

Figure 12 is the synoptic diagram of first parts of Figure 11, is to overlook synoptic diagram (a), (b) be X to looking the side synoptic diagram, (c) be to look up synoptic diagram, (d) be Y to looking the side synoptic diagram, (e) be that H-H is to looking sectional view.

Figure 13 is the sectional view of first parts of Figure 11, (a) is the F-F simplified schematic cross-sectional view of Figure 12, (b) is the G-G simplified schematic cross-sectional view of Figure 12.

Figure 14 is the three-dimensional synoptic diagram of the bearing support of presentation graphs 1.

Figure 15 is the synoptic diagram of the bearing support of Figure 14, (a) is to look up synoptic diagram, (b) be N-N to looking simplified schematic cross-sectional view, (c) be that M-M is to looking simplified schematic cross-sectional view.

Figure 16 is the synoptic diagram of the bearing support of Figure 14, (a) is to overlook synoptic diagram, (b) is that O-O is to looking simplified schematic cross-sectional view.

Figure 17 is the synoptic diagram of the cylinder of Fig. 1, and the X that (a) is (b) (b) is the summary front view to looking the side synoptic diagram, (c) is that K-K is to looking simplified schematic cross-sectional view.

Figure 18 is parts and the perspective illustration of together representing to be installed on the cylinder of Fig. 1 of cylinder.

Figure 19 is the three-dimensional synoptic diagram of the skull of presentation graphs 1.

Figure 20 is the synoptic diagram of the skull of Figure 19, (a) is the internal surface synoptic diagram, (b) be X to looking the side synoptic diagram, (c) be the outer surface synoptic diagram, (d) be that L-L is to looking simplified schematic cross-sectional view.

Figure 21 is the decomposition explanatory drawing of piston of inside of the reciprocating compressor of presentation graphs 1, (a) is the figure of 4 pistons of explanation, (b) is the figure of 1 piston of explanation.

Figure 22 is the three-dimensional synoptic diagram of installation of assembling middle shell that is used for the reciprocating compressor of explanatory drawing 1.

Figure 23 is the perspective illustration of installation of assembling piston that is used for the reciprocating compressor of explanatory drawing 1.

Figure 24 is the perspective illustration of installation of assembling cylinder etc. that is used for the reciprocating compressor of explanatory drawing 1.

Figure 25 is used for the assembling cylinder of reciprocating compressor of explanatory drawing 1 for the perspective illustration of the location of housing.

Figure 26 is the perspective illustration of installation of bearing support, housing lid etc. of assembling that is used for the reciprocating compressor of explanatory drawing 1.

Figure 27 is axle zone and the explanation synoptic diagram of its neighboring area that is used for the reciprocating compressor of explanatory drawing 1.

Figure 28 is the figure of explanation piston rod, (a) is the synoptic diagram of overlooking of reciprocating compressor, (b) is the synoptic diagram of overlooking of piston.

Figure 29 is the angle of oscillation of explanation piston and the figure of sliding distance, (a) is the illustraton of model under the constant situation of eccentric distance, (b) is the illustraton of model under the inconstant situation of eccentric distance.

Figure 30 is the figure of the change of the explanation torque that makes the motor reel under the situation that cylinder number changes.

Figure 31 is the block diagram of oxygen concentrating device with reciprocating compressor of Fig. 1.

Figure 32 is the figure that flows of the interior air of the reciprocating compressor of explanatory drawing 1, and Figure 32 (a) is the longitudinal section of explanation cooling with suction port, and Figure 32 (b) is that the longitudinal section with exhaust port is cooled off in explanation.

Figure 33 is the synoptic diagram of the reciprocating compressor of expression second mode of execution of the present invention, is to overlook synoptic diagram (a), (b) is that Y is to looking the side synoptic diagram.

Figure 34 is that the P-P of Figure 33 (b) is to looking simplified schematic cross-sectional view.

Figure 35 is that the Q-Q of Figure 34 is to looking simplified schematic cross-sectional view.

Figure 36 is that the R-R of Figure 33 (a) is to looking simplified schematic cross-sectional view.

Figure 37 is that the S-S of Figure 33 (a) is to looking simplified schematic cross-sectional view.

Figure 38 is the schematic representation of the reciprocating compressor of explanation the 3rd mode of execution of the present invention.

Figure 39 is the action specification figure of above-mentioned mode of execution.

Figure 40 is the figure of relation at angle of swing and the PV value and the head tilt angle of the above-mentioned mode of execution of expression.

Figure 41 is the schematic representation of the existing reciprocating compressor of explanation.

Symbol description

1,101 reciprocating compressors

2 motor

The 2b main part

The 2s motor reel

The 2t shaft end

3,103 housings

3B first positioning part

Exhaust port is used in the 3j cooling

The 3d motor is used through hole

3f first parts

The 3r slot part

3s second parts

The 3t annulus

3u sucks and uses protuberance

The 3v columnar part

The 3w reinforcing part

3x discharges with inlet

3y, 103y suck with outlet

3z, 103z suction port

4,104,204 cylinders

4a, 204a main part

4p, 204p plat part

4h, 104h skull

4j, 204j pressing chamber

4A, 204A elastic member

4B second positioning part

5,205 pistons

5h, 205h piston crown

5R, 205R bar portion

6,106 suction passages

6f, 106f second parallel portion

7 discharge stream

7f first parallel portion

The 7s tributary circuit

The 7A adhesive

8 converge the discharge stream

9,109 converge suction passage

10 bearing supports

The 10h exhaust port

10i discharges and uses inflow entrance

Suction port is used in the 10j cooling

15 housing lid

16 companion flanges (companion flange)

17 eccentric shafts

18 counterweights

21 pedestals

22a, 22b bearing

27,227 pressing plates

28,228 sealed members

29 bolts

30 separation materials

31 zones

32 neighboring areas

33 planes vertical with axle direction

100 oxygen concentrating devices

303 control valves

304A first absorbing cylinder

304B second absorbing cylinder

305A, 305B one-way valve

306 blow down valves

307 oxygen jars

308 reduction valve

309 flow regulator

310 ejiction opening joiners

311 membrane filters

320 control devices

322 sound-proof boxes

323 fans

324 exhaust ports

361 pipes

362 discharge tubes

The R datum plane

The S sealing plane

Z discharges gas flow path

Embodiment

(first mode of execution)

Below, with reference to description of drawings preferred implementation of the present invention.Fig. 1 is the three-dimensional synoptic diagram of the reciprocating compressor of expression first mode of execution of the present invention.Fig. 2 is the synoptic diagram of the reciprocating compressor of Fig. 1, (a) is to overlook synoptic diagram, (b) be X to looking the side synoptic diagram, (c) be that Y is to looking the side synoptic diagram.Fig. 3 is that the A-A of Fig. 2 (c) is to looking simplified schematic cross-sectional view.Fig. 4 is that the B-B of Fig. 2 (a) is to looking simplified schematic cross-sectional view.Fig. 5 is that the C-C of Fig. 2 (a) is to looking simplified schematic cross-sectional view.Fig. 6 is that the D-D of Fig. 2 (c) is to looking simplified schematic cross-sectional view.Fig. 7 is that the E-E of Fig. 3 is to looking simplified schematic cross-sectional view.Fig. 8 is that the Z of Fig. 1 of expression reciprocating compressor is to looking approximate three-dimensional map.Fig. 9 is the three-dimensional synoptic diagram of second parts of the housing of presentation graphs 1.Figure 10 is the synoptic diagram of second parts of Fig. 9, (a) is the T-U-V compound section figure of (b), is to overlook synoptic diagram (b), (c) be X to looking the side synoptic diagram, (d) be Y to looking the side synoptic diagram, (e) be the J-J sectional view.Figure 11 is the three-dimensional synoptic diagram of first parts of the housing of presentation graphs 1.Figure 12 is the synoptic diagram of first parts of Figure 11, is to overlook synoptic diagram (a), (b) be X to looking the side synoptic diagram, (c) be to look up synoptic diagram, (d) be Y to looking the side synoptic diagram, (e) be that H-H is to looking sectional view.Figure 13 is the sectional view of first parts of Figure 11, (a) is the F-F simplified schematic cross-sectional view of Figure 12, (b) is the G-G simplified schematic cross-sectional view of Figure 12.Figure 14 is the three-dimensional synoptic diagram of the bearing support of presentation graphs 1.Figure 15 is the synoptic diagram of the bearing support of Figure 14, (a) is to look up synoptic diagram, (b) be N-N to looking simplified schematic cross-sectional view, (c) be that M-M is to looking simplified schematic cross-sectional view.Figure 16 is the synoptic diagram of the bearing support of Figure 14, (a) is to overlook synoptic diagram, (b) is that O-O is to looking simplified schematic cross-sectional view.Figure 17 is the synoptic diagram of the cylinder of Fig. 1, and the X that (a) is (b) (b) is the summary front view to looking the side synoptic diagram, (c) is that K-K is to looking simplified schematic cross-sectional view.Figure 18 is parts and the perspective illustration of together representing to be installed on the cylinder of Fig. 1 of cylinder.Figure 19 is the three-dimensional synoptic diagram of the skull of presentation graphs 1.Figure 20 is the synoptic diagram of the skull of Figure 19, (a) is the internal surface synoptic diagram, (b) be X to looking the side synoptic diagram, (c) be the outer surface synoptic diagram, (d) be that L-L is to looking simplified schematic cross-sectional view.Figure 21 is the decomposition explanatory drawing of piston of inside of the reciprocating compressor of presentation graphs 1, (a) is the figure of 4 pistons of explanation, (b) is the figure of 1 piston of explanation.Figure 22 is the three-dimensional synoptic diagram of installation of assembling middle shell that is used for the reciprocating compressor of explanatory drawing 1.Figure 23 is the perspective illustration of installation of assembling piston that is used for the reciprocating compressor of explanatory drawing 1.Figure 24 is the perspective illustration of installation of assembling cylinder etc. that is used for the reciprocating compressor of explanatory drawing 1.Figure 25 is used for the assembling cylinder of reciprocating compressor of explanatory drawing 1 for the perspective illustration of the location of housing.Figure 26 is the perspective illustration of installation of bearing support, housing lid etc. of assembling that is used for the reciprocating compressor of explanatory drawing 1.Figure 27 is axle zone and the explanation synoptic diagram of its neighboring area that is used for the reciprocating compressor of explanatory drawing 1.Figure 28 is the figure of explanation piston rod, (a) is the synoptic diagram of overlooking of reciprocating compressor, (b) is the synoptic diagram of overlooking of piston.Figure 29 is the angle of oscillation of explanation piston and the figure of sliding distance, (a) is the illustraton of model under the constant situation of eccentric distance, (b) is the illustraton of model under the inconstant situation of eccentric distance.Figure 30 is the figure of the change of the explanation torque that makes the motor reel under the situation that cylinder number changes.Figure 31 is the block diagram of oxygen concentrating device with reciprocating compressor of Fig. 1.Figure 32 is the figure that flows of the interior air of the reciprocating compressor of explanatory drawing 1, and Figure 32 (a) is the longitudinal section of explanation cooling with suction port, and Figure 32 (b) is that the longitudinal section with exhaust port is cooled off in explanation.Wherein, in Fig. 3～Fig. 5, represent profile, represent with the cross section for the part beyond the motor for motor.

(overall structure)

The overall structure of the reciprocating compressor 1 of this mode of execution at first, is described.In this mode of execution, reciprocating compressor 1 is used as the compressor that sucks gaseous fluid (air) and compress at the oxygen concentrator of the oxygen that is used for producing high concentration etc.Though omitted diagram, oxygen concentrator constitutes, and uses 1 pair of air that is taken into of this reciprocating compressor to compress, and this pressurized air of discharge is contacted with synthetic zeolite (having the nitrogen adsorption function), discharges the oxygen of high concentration thus.

Reciprocating compressor 1 comprises motor 2,4,4 pistons 5 of 3,4 cylinders of housing, a plurality of suction passage 6, a plurality of discharge stream 7, converges suction passage 9, converges and discharge stream 8 and bearing support 10.The air that is taken into, through discharging stream 7, converging and discharge stream 8, finally discharges from reciprocating compressor 1 after this is compressed through converging suction passage 9,4 cylinders 4 of suction passage 6 inflows.The structure of each one below is described.

(motor)

Motor 2 has motor reel 2s and main part 2b (with reference to Fig. 3).The number of the motor of reciprocating compressor 1 is one, drives 4 pistons 5 (detailed content is narrated in the back) through a motor 2.Motor reel 2s is the output shaft of motor 2, and is as shown in Figure 3, supported by pedestal 2h.And, motor reel 2s, thus can rotate freely by the bearing 22a of the inboard that is installed in housing 3 and the bearing 22b supporting that is configured in the shaft end 2t of motor reel 2s by 10 supportings of bearing support plate.The first parts 3f (afterwards stating) of the housing 3 of taking in motor reel 2s is installed on motor 2 in addition.

(housing)

In addition, housing 3 is taken in motor reel 2s etc., through companion flange 16 motor 2 is installed at one end.Housing 3 comprises the first parts 3f and the second parts 3s (with reference to Figure 22,23).The first parts 3f and the second parts 3s are independent respectively to be formed, and the pyroconductivity of the thermal conductivity ratio second parts 3s of the first parts 3f is high.Specifically, the first parts 3f is metal, and the second parts 3s is resinous.In addition, the first parts 3f and the second parts 3s are not limited to these materials.For example, the second parts 3s can be the low metallic parts of the thermal conductivity ratio first parts 3f, and in addition, the first parts 3f and the second parts 3s can be identical materials.In addition, the pyroconductivity of the second parts 3s can be higher than the first parts 3f.The first parts 3f and the second parts 3s below are described.

(first parts)

The first parts 3f works as common housing.As stated, the first parts 3f is metal, in reciprocating compressor 1, works as the skeleton part around the motor reel 2s.In addition, the first parts 3f has 4 reinforcing part 3w.Reinforcing part 3w forms (with reference to Figure 11～13) with the mode of extending along the motor reel direction.More particularly; The first parts 3f is following shape: in the quadrangular barrel that extends along the motor reel direction that is installed in 2 last times of motor; On each of 4 wall portions; Be formed with along axial 4 the slot part 3r of motor, the result, each wall portion of the first parts 3f is U word shape in front view.In addition, be formed with the reinforcing part 3w that extends along the motor reel direction in 4 bights of the first parts 3f.At 4 slot part 3r that are formed between 4 reinforcing part 3w, embed 4 linking department 5c (with reference to Figure 21) and protuberance 10z, 10w (afterwards stating) (with reference to Figure 15,16) of bearing support 10 in the piston 5 respectively.In addition, be used for making the motor of the perforations such as motor reel 2s of motor 2 to be formed on the central part of the plan view (Figure 12 (a), (c)) of the base plate 3q of the first parts 3f with through hole 3d.And, be formed with the part (detailed content is narrated in the back) of a plurality of discharge streams 7 in the inside of the first parts 3f.And, bearing 22a is installed on the first parts 3f.

In addition, a plurality of discharge streams 7 have the axial first parallel portion 7f (with reference to Figure 13, Fig. 4, Fig. 6) along motor reel 2s respectively.And the first parallel portion 7f is formed on the inside of housing 3.In addition, on the first parts 3f, be formed with corresponding respectively 4 discharges that amount to of 4 cylinders 4 and use inlet 3x, these 4 discharges are connected (with reference to Fig. 4, Fig. 7) with the inside of 4 cylinders 4 respectively with inlet 3x.In addition, in the first parts 3f, be formed with two first parallel portion 7f, they are configured in non-conterminous two bights (with reference to Fig. 6) to clip the mutual opposed mode of motor reel 2s.One first parallel portion 7f is provided with two discharges with inlet 3x.That is, one first parallel portion 7f is the shared stream from the air of two cylinders, 4 discharges.Specifically, describe with Fig. 6, in the connection with the inside of two cylinders 4 on a left side be the first upper left parallel portion 7f, connect right with under two cylinders 4 inside be the first parallel portion 7f of bottom right.In addition, in 4 bights of the first parts 3f, two first parallel portion 7f are configured in the upper left and bottom right of Fig. 6, also are formed with two stream 106f (with reference to Fig. 5) respectively at the upper right and bottom left section of Fig. 6, and this does not use in this mode of execution.In addition, in Figure 11～13, amount to 4 discharge with inlet 3x in, in order to make the corresponding relation between each figure clear and definite, for wherein two discharges symbol with the special mark of inlet 3x (a), 3x (b).

The air that in each cylinder 4, is compressed and discharges, through with the discharge of each cylinder 4 corresponding settings with inlet 3x, send into (with reference to Fig. 4 etc.) to the first parallel portion 7f.In addition, shown in this mode of execution, through forming stream in inside as the reinforcing part 3w of the skeleton of housing 3, can guarantee housing add powerful in prevent to maximize, effectively utilize housing.And; Under the situation of the heat radiation of carrying out head by external refrigeration device (blower or fan etc.); As shown in Figure 4; Use inlet 3x to be configured in two positions at diagonal angle with 4 corresponding respectively 4 discharges that are provided with of cylinder 4, also can not cool off 4 cylinders 4 respectively thus, therefore can cool off efficiently.

And, be formed with cooling with exhaust port 3j (with reference to Figure 11 and Figure 12) at the sidepiece of the first parts 3f.Cooling with exhaust port 3j be used for from after the discharge gas flow path Z (with reference to Figure 32) that states discharge to cool off and use medium.

(second parts)

The second parts 3s is formed from a resin as stated, two columnar part 3v that have annulus 3t, annulus 3t installed and sucking with protuberance 3u (with reference to Fig. 9,10).Two columnar part 3v form the axle direction extension (with reference to Figure 10 (a)) along the motor reel 2s under the state that is installed on the motor 2 with sucking with protuberance 3u.Be formed with the part (detailed content is narrated in the back) of a plurality of suction passages 6 in the inside of two columnar part 3v, be formed with in the inside of annulus 3t and converge suction passage 9 (with reference to Figure 10 (a) and (b), Fig. 3 etc.).In addition, be formed with suction port 3z with protuberance 3u sucking, be sent to from the air of suction port 3z entering and converge suction passage 9 (with reference to Fig. 4, Figure 10 (c) etc.).

In addition, a plurality of suction passages 6 have the axial second parallel portion 6f (with reference to Figure 10, Fig. 5～7) along motor reel 2s respectively.In addition, be formed with amount to 4 suctions corresponding at the second parts 3s and use outlet 3y with 4 cylinders, 4 difference.And this sucks inside with each of outlet 3y and 4 cylinders 4 and is connected (with reference to Fig. 6,10 (b) etc.).In addition, in the second parts 3s, be formed with two second parallel portion 6f, they dispose (with reference to Fig. 6,10 (b) etc.) to clip the mutual opposed mode of motor reel 2s.One second parallel portion 6f is provided with two suctions with outlet 3y.That is, one second parallel portion 6f is the shared stream (with reference to the dot and dash line portion of the expression suction passage 6 of Figure 10 (b)) of the air supplied with to two cylinders 4.Specifically, describe with Fig. 6, in the connection with the inside of right two cylinders 4 be the second upper right parallel portion 6f, connect a left side and two cylinders 4 down inside be the second parallel portion 6f under left.In addition; Two second parallel portion 6f practise physiognomy and are positioned at the bight of the first parts 3f over the ground; In 4 bights of the first parts 3f, practise physiognomy be arranged in over the ground the bight different with two the first residing bights of parallel portion 7f (bight of the upper left and bottom right of Fig. 6) (Fig. 6 upper right and left under the bight).Thus, isolate suction passage 6 and discharge stream 7, the heat that therefore can suppress to discharge stream 7 is sent to suction passage 6.

In addition, in reciprocating compressor 1, the columnar part 3v of the second parts 3s is configured in the position (angle part of Fig. 6) (with reference to Fig. 6,7) of 4 in 4 cylinders of the 90 degree configurations of when overlooking, respectively staggering at the Zhou Fangxiang of motor reel 2s.In addition, the ultimate range of columnar part 3v apart from the ultimate range at motor reel 2s center and skull 4h apart from motor reel 2s center about equally.And, because columnar part 3v includes in the quadrilateral (with reference to the T of Fig. 6) that is made up of the straight line along the outer surface of 4 skull 4h, therefore can effectively utilize the space of 4 in cylinder when overlooking, prevent the maximization of housing.

(converging suction passage)

The suction passage 9 that converges that is formed on the inside of annulus 3t is used to converge a plurality of suction passages 6.Converging suction passage 9, to form with the axial axle zone 31 along motor reel 2s be the ring-type stream (with reference to Figure 27) at center.And, converge suction passage 9 and be configured to and neighboring area 32 overlapping (with reference to Figure 27) along the axial axle zone 31 of motor reel 2s.The detailed content of this configuration is narrated in the back.In addition, converge suction passage 9 become through the second parts 3s with after the space (with reference to Fig. 3～5) of combined closing of the companion flange 16 stated.In addition, converging suction passage can not be the ring-type stream, for example can form bulk.In addition, in this mode of execution, the round center of converging suction passage 9 is consistent with the center of motor reel 2s; Thus; From the viewpoint of miniaturization, can carry out with motor reel 2s is the good configuration of balance at center, is converging under the situation that suction passage is a ring-type; The round center of converging suction passage also can be inconsistent with the center of motor reel, can squint in the center.

(cylinder)

In this mode of execution, cylinder is provided with 4.And; 4 cylinders 4 dispose along the mode with the direction of the axle direction quadrature of motor reel 2s with cylinder axis direction (direction of arrow of Fig. 6) respectively; And when overlooking; 2 cylinders 4 are configured on the straight line through the center of motor reel 2s, and 2 cylinders 4 are configured on the straight line with above-mentioned straight line quadrature and the center through motor reel 2s (with reference to Fig. 6, Figure 28 etc.) in addition.4 cylinders 4 have pressing chamber 4j (cylinder interior) (with reference to Figure 17 etc.) respectively.In addition, cylinder 4 have along the axial cylindrical main body 4a of portion of cylinder and with the fixing tabular plat part 4p of the end of main part 4a.The part of plat part 4p becomes in the face of the part of the wall portion of pressing chamber 4j (with reference to Figure 17 (c)).Main part 4a and plat part 4p are by skull 4h (back narration) is installed in cylinder 6 bolt in 4 last times.And, between main part 4a and plat part 4p, clip elastic member 4A (with reference to Fig. 3).In addition, between main part 4a and plat part 4p, also can not clip the elastic member 4A of ring-type, in addition, elastic member 4A can not be a ring-type also.And, be formed with 4 through hole 4b, 4c, 4f, 4g at plat part 4p.In addition, be formed with slot part 4m (with reference to Figure 17 etc.) at plat part 4p.And main part 4a has internal diameter (bore diameter) X (with reference to Figure 28 (a)).

Each structure member shown in figure 18 is installed on cylinder 4.Specifically, expulsion valve 4w, expulsion valve pressing plate 4z, Aspirating valves 4v install through set screw 20a, pad 20b.Aspirating valves 4v is installed in the pressing chamber 4j side of cylinder 4 inboards, and expulsion valve 4w and expulsion valve pressing plate 4z are installed in the outside (with reference to Figure 18, Fig. 6) of cylinder 4.Aspirating valves 4v is normally closed, when the pressure of the air through through hole 4c is the size of regulation when above, and bending and become open mode.In addition, expulsion valve 4w is normally closed, when the compressed-air actuated pressure through through hole 4f is the size of regulation when above, and (by expulsion valve pressing plate 4z restriction maximum bend angle) bending and become open mode.

In addition, for each cylinder 4, skull 4h is mounted (with reference to Figure 19,20) through 6 bolts.Be formed with inner space and obstruct section 4s at skull 4h, the inner space of skull 4h is separated into the first Room 4n and the second Room 4k by obstruct section 4s.Here, the first Room 4n is supplied to the space that the preceding air of pressing chamber 4j passes through, and the second Room 4k is the space of passing through from the air that pressing chamber 4j discharges.In addition; Skull 4h clips cylinder seal spare 20e (with reference to Figure 24) and is installed on the cylinder 4; This cylinder seal spare 20e forms the slot part 4m that the front end that makes obstruct section 4s embeds cylinder 4; Be installed under the state on the cylinder 4 at skull 4h, obstruct section 4s and slot part 4m are sealed through cylinder seal spare 20e, in the inside of skull 4h; Through skull 4h and plat part 4p, the first Room 4n, the second Room 4k form the space (with reference to Fig. 7) that (when being open mode except expulsion valve 4w or Aspirating valves 4v) is closed.

Below explanation skull 4h is installed in the state on the cylinder 4.Through hole 4b is connected with outlet 3y with the suction of the second parts 3s, and the air that arrives through the second parallel portion 6f is supplied to the first Room 4n (with reference to Fig. 6) through sucking with outlet 3y, through hole 4b.Through hole 4c is the hole that the air that is imported into through through hole 4b is passed through, and the air of the first Room 4n is sent to pressing chamber 4j (with reference to Fig. 6) through through hole 4c.In addition, through hole 4f makes the hole of passing through from the pressurized air of pressing chamber 4j discharge, and pressurized air is through after the through hole 4f, and is inner at the second Room 4k, is sent to through hole 4g (with reference to Figure 18).Through hole 4g is connected with inlet 3x with the discharge of the first parts 3f, and the pressurized air that is discharged from is sent to the first parallel portion 7f (with reference to Fig. 7) through through hole 4g, discharge with inlet 3x.In addition, the inner space of skull 4h (outside of plat part 4p) constitutes the part of suction passage 6, discharge stream 7.And, in the inner space of skull 4h (outside of plat part 4p), suction passage 6, discharge the flowing shown in the dot and dash line of Figure 18 of air in the stream 7.In the inside of the cylinder 4 of said structure, carry out air-breathing, compression, exhaust.

(piston)

4 pistons 5 are configured in each inside (with reference to Fig. 3～7 etc.) of 4 cylinders 4.In the reciprocating compressor 1 of this mode of execution, be provided with and 44 pistons 5 that cylinder is corresponding.Shown in Figure 21 (a), each piston 5 is formed with the piston crown 5h on each that can be entrenched in to to-and-fro motion 4 cylinders 4 respectively and can be entrenched in the 5R of bar portion on the eccentric shaft 17 that is fixed on the motor reel 2s rotatably.And the 5R of bar portion is made up of linking department 5c and ring portion 5r.Between the sealed member 28 and pressing plate 27 that are configured on the piston crown 5h, shown in Figure 21 (b), accompany Spacer 30, link through a bolt 29 and fix.In addition, eccentric shaft 17 is provided with the bearing 17b of the inside that is configured in the 5R of bar portion.

And in each of 4 pistons 5, shown in Figure 28 (a) and Figure 28 (b), the piston rod 5P of the straight line corresponding with the central shaft of piston crown 5h has the length L from the end face 27s of pressing plate 27 to the center of the ring portion 5r of piston 5.The angle of oscillation of piston 5 shown in Figure 28 (a), is represented with respect to the tiltangle of cylinder axis by piston rod 5P when overlooking, and in the present embodiment, having revolved at motor reel 2s becomes maximum when turning 90 degrees.And 4 pistons 5 slide in cylinder 4 and carry out air-breathing compression stroke in the phase difference of keeping 90 degree respectively.

And 4 pistons 5 are assembled into state shown in Figure 23.Specifically, shown in Figure 21 (a), on 1 eccentric shaft 17, insert the ring portion 5r of 4 pistons 5 successively, and insert counterweight 18.At this moment, at the axle direction of motor reel 2s,, between the ring portion 5r of 4 pistons 5, dispose 3 adjustment component 34 respectively in order to adjust the position of piston 5.

(bearing support)

Bearing support 10 shown in Figure 14～16 is configured in the shaft end 2t (with reference to Fig. 3～5, Figure 26) of motor reel 2s.Bearing support 10 rotates supporting motor axle 2s freely through bearing 22b, is formed with to converge at this bearing support 10 and discharges stream 8 (with reference to Figure 14～16).Central part at bearing support 10 is formed with bearing hole 10k, and the shaft end 2t of motor reel 2s is embedded in this bearing hole 10k (with reference to Fig. 3).In addition; Sidepiece at bearing support 10; In mutual opposed position; (under the state assembled as reciprocating compressor 1) is formed with protuberance 10w, the 10z that extends along the axle direction of motor reel 2s, in each of this protuberance 10w, 10z, is formed with exhaust port 10h, cooling with suction port 10j (with reference to Figure 14～16).The pressurized air that in converging discharge stream 8, is converged is finally discharged (with reference to Figure 16 (a)) from exhaust port 10h.Cooling is used for the inside of cooling off with the discharge gas flow path Z (with reference to Figure 32) that states after the medium suction with suction port 10j.Be formed with two discharges in the angle part of bearing support 10 and use inflow entrance 10i, this is discharged with inflow entrance 10i and constitutes a part of discharging stream 7.In addition, two discharges converge the mode of discharging stream 8 and form to be connected to respectively with inflow entrance 10i, discharge stream 7 and converge discharge stream 8 (with reference to Fig. 4,16 etc.) via discharging to be connected to inflow entrance 10i.

(converge and discharge stream)

The discharge stream 8 that converges that is formed on the inside of bearing support 10 is used to converge a plurality of discharge streams 7, and forming with the axial axle zone 31 along motor reel 2s is the ring-type stream (with reference to Figure 27) at center.And, converge discharge stream 8 and be configured to axial regional 31 neighboring area 32 overlapping along motor reel 2s.The detailed content of this configuration is narrated in the back.In addition, form along the plane vertical 33 and expand (with reference to Figure 14,27) two-dimentionally as discharging stream 8 converging of forming of ring-type stream with the axle direction of motor reel 2s.In addition, converge discharge stream 8 become through bearing support 10 with after the space (with reference to Fig. 3～5) sealed of the combination of the housing lid 15 stated.In addition, converging the discharge stream can not be the ring-type stream.In addition, in this mode of execution, it is consistent with the center of motor reel 2s to converge the round center of discharging stream 8; Thus; From the viewpoint of miniaturization, can carry out with motor reel 2s is the good configuration of balance at center, is under the situation of ring-type converging the discharge stream; The round center of converging suction passage also can be inconsistent with the center of motor reel, can squint in the center.In addition; In this mode of execution, be formed and discharge stream 8 converging of ring-type stream and form along the plane vertical 33 and expand two-dimentionally, but be not limited thereto with the axle direction of motor reel 2s; Also can form along expand two-dimentionally with respect to plane 33 plane inclined; In addition, can be not do not form yet, but for example form with the mode of on axle direction, extending with the mode of two-dimensional expansion.In addition, converge and discharge stream and also can not be formed on bearing support, for example, can be provided with in addition with different the converging of parts such as bearing support and discharge the parts that stream is used.Discharge stream 8 through being provided with to converge, can prevent the increase of part number like bearing support that this mode of execution is shown in 10.

In addition, in this mode of execution, only be formed with to converge at bearing support 10 and discharge stream 8, as long as but converge and discharge stream and be formed on bearing support with the arbitrary at least side who converges in the suction passage, be not limited to such structure.For example, can only be to converge suction passage to be formed on bearing support, also can be to converge to discharge stream the two is formed on bearing support with converging suction passage.

(converge suction passage and converge the position relation of discharging stream)

Then, with reference to Figure 27 etc., explain and converge suction passage 9 and converge the position of discharging stream 8 and concern.At first, converging suction passage 9 discharges stream 8 and on the axle direction of motor reel, is disposed at the both sides (with reference to Fig. 3～5) that clip 4 cylinders 4 with converging.And, at the axle direction of motor reel 2s, converge and discharge the shaft end 2t side that stream 8 is configured in motor reel 2s, converge suction passage 9 and be configured in main part 2b side.

In addition, converge suction passage 9 and discharge stream 8 and form ring-type with converging, their round center is consistent with the round center of motor reel 2s.In addition, converging suction passage 9 discharges stream 8 the two is configured to overlapping along arbitrary at least side of the axial axle zone 31 of motor reel and its neighboring area 32 with converging.Here, " overlapping " be meant, and be shown in figure 27, converges suction passage 9 or converge and discharge stream 8 and be configured to include in the zone that is made up of axle zone 31 and peripheral region 32.Converging suction passage 9 discharges stream 8 direction does not exceed the width (with reference to the width W 1 of Figure 27) in the zone that is made up of axle zone 31 and neighboring area 32 in the footpath with converging.In this mode of execution, W1 roughly is the size of the diameter of companion flange 16.In addition, converge suction passage, converge and discharge the width (with reference to the width W 2 of Figure 27) that stream does not more preferably exceed the main part 2b of motor 2.The discharge stream 8 that converges of this mode of execution does not exceed this width, thereby in the footpath direction vertical with axle direction, can suppress the maximization of compressor.In addition, converge suction passage 9, converge and discharge stream 8 and on the axle direction position, have the part that repeats with motor reel 2s.Therefore, on axle direction, also can suppress the maximization of compressor.

In addition; In this mode of execution; Converge and discharge the shaft end 2t side that stream 8 is configured in motor reel 2s, converge suction passage 9 and be configured in main part 2b side, but converge suction passage 9 and converge the shaft end 2t side that the arbitrary side who discharges in the stream 8 is configured in motor reel 2s; The opposing party is configured in main part 2b side and gets final product, and this configuration also can be opposite.In addition, converge and discharge stream and converge suction passage and also can not be configured in the both sides that clip cylinder 4, can not clip cylinder 4, discharge stream and converge suction passage but on the axle direction of motor reel 2s, converge in the same side configuration of cylinder 4 relatively.

In addition; In this mode of execution, converge suction passage 9 and discharge stream 8 the two is configured in the inside of neighboring area 32, but converge suction passage and converge the arbitrary at least side who discharges in the stream and be configured to and any overlapping getting final product at least in the axial axle zone 31 of motor reel and its neighboring area with converging; For example; Also can adopt following structure, only converge the arbitrary side who discharges stream and converge in the suction passage and include (on the direction of footpath, the scope of width W 1 is interior) in the zone that constitutes by axle zone 31 and neighboring area 32 in; And; The opposing party does not include in the zone that is made up of axle zone 31 and neighboring area 32 but stretches out, and in addition, can be configured to yet; Be not discharge stream converging of ring-type or converge suction passage do not repeat on the motor reel direction with motor reel 2s and with axle zone 31 and neighboring area 32 overlapping (on the direction of footpath, including in the scope of width W 1).

(suction passage)

Then, a plurality of suction passages 6 are described.As stated, a plurality of suction passages 6 form with the mode of the inside through the second parts 3s, and a plurality of suction passages 6 form that portion can flow-through fluid within it.In addition, each inside (pressing chamber 4j) of a plurality of suction passages 6 and 4 cylinders 4 is connected (with reference to the dot and dash line portion of the expression suction passage 6 of Fig. 6).

At first, air flows into from here and converges suction passage 9 (with reference to Fig. 4, Figure 10) from the inside that the suction port 3z of the second parts 3s gets into the second parts 3s.Below, explain that each suction passage 6 is promptly until the stream of cylinder 4 inside (pressing chamber 4j).The inside of the second parts 3s forms to be converged suction passage 9 and is connected to 2 second parallel portion 6f, and the air that converge in the suction passage 9 are sent to 2 second parallel portion 6f (with reference to Fig. 5,10).Then, the air through each second parallel portion 6f is sent to the first Room 4n (with reference to Fig. 6,10 etc.) from sucking with exporting 3y through through hole 4b.Then, the air of the first Room 4n is sent to pressing chamber 4j through through hole 4c.A suction passage 6 constitutes as stated.

(discharge stream)

Then, a plurality of discharge streams 7 are described.As stated, a plurality of discharge streams 7 form with the mode of the inside through the first parts 3f, and a plurality of discharge streams 7 form that portion can flow-through fluid (in this mode of execution, being air) within it.In addition, each inside (pressing chamber 4j) of a plurality of discharge streams 7 and 4 cylinders 4 is connected (the dot and dash line portion that discharges stream 7 with reference to the expression of Fig. 4).

Below explanation each discharge stream 7, promptly from cylinder 4 inside (pressing chamber 4j) to the stream of exhaust port 10h.At first, through through hole 4f, and, get into through hole 4g (with reference to Figure 18) at the compressed air of pressing chamber 4j of the inside of cylinder 4 through the second Room 4k.Then, be sent to the discharge usefulness inlet 3x of the first parts 3f through the pressurized air of through hole 4g, be sent to the first parallel portion 7f (with reference to Fig. 7) from here.Then, pressurized air is through the first parallel portion 7f, and the discharge that gets into bearing support 10 is with inflow entrance 10i (with reference to Fig. 4).Discharging stream 7 for one constitutes in the above described manner.The pressurized air of discharging stream 7 inflows from a plurality of (4) flows into to converge with inflow entrance 10i via discharge discharges stream 8 (with reference to Figure 16), finally is discharged from from exhaust port 10h.

In addition, in this mode of execution, reciprocating compressor 1 has 4 and discharges stream 7 and 4 suction passages 6., as stated, discharge in the streams 7 at 4, the first parallel portion 7f is 2 and discharges the shared stream of streams 7 here, and in 4 suction passages 6, the second parallel portion 6f is the shared streams of 2 suction passages 6.Like this, a plurality of discharge streams 7 have shared stream respectively with a plurality of suction passages 6 in a part, but the number of discharge stream 7 and suction passage 6 is handled as 4 respectively.

In addition, 4 discharge streams 7 have the tributary circuit 7s (with reference to Fig. 4) along gravitational direction.And, dispose adhesive 7A at tributary circuit 7s.Thus, the abrasion pruinescence adhesive 7A absorption of the sealed member 28 that produces by the oscillating motion of piston 5, thus can prevent that it is expelled to the outside of reciprocating compressor 1.In addition, in this mode of execution, the first parallel portion 7f and tributary circuit 7s be equally along gravitational direction, and dispose adhesive 7A (with reference to Fig. 4), thereby can prevent to wear and tear the outside that pruinescence is expelled to reciprocating compressor 1.

(assembling of reciprocating compressor)

The assembling of reciprocating compressor 1 then, is described.At first, companion flange 16 and housing 3 (the first parts 3f, the second parts 3s) (with reference to Figure 22) are installed on motor 2.Between the companion flange 16 and the second parts 3s, O type ring 20c, the 20d (with reference to Figure 22, Fig. 3～5) of the bubble-tight rubber system that is used to guarantee air is installed here.In addition, companion flange 16 for assembling motor 2 with housing 3 and when the housing of oxygen concentrator is installed reciprocating compressor 1, be provided with as fixed bearing portion.Therefore, in this mode of execution, the structure that adopts the size of the annulus 3t make the second parts 3s and companion flange 16 to be complementary, thus on the basis of guaranteeing, can suppress the maximization of compressor as the necessary size of fixed bearing portion.

Then, 4 pistons 5 (with reference to Figure 23) are installed.Here, shown in Figure 21 (a), 4 pistons 5 are the state that together inserts eccentric shaft 17 with counterweight 18 and adjustment component 34.Thereby,, can easily make the axle center of cylinder 4 consistent with the axle center of the piston crown 5h of piston 5 through utilizing the position of 4 piston 5 5R of bar portion separately of adjustment part 34 adjustment.Thereby, can suppress the eccentric wear of sealed member 28.

Then, 4 cylinders 4 (with reference to Figure 24) are installed.Specifically, cylinder 4 is installed, skull 4h is installed on cylinder 4 with the mode that covers each piston 5.In addition, the cylinder 4 here is the illustrated state that Aspirating valves 4v, expulsion valve 4w are installed of Figure 18, in addition, between cylinder 4 and skull 4h, is equipped with and is used to guarantee bubble-tight cylinder seal spare 20e.In addition, skull 4h uses a plurality of fixing bolt 20h, 20i that cylinder 4 is installed.In addition, be used to guarantee bubble-tight O type ring 20f in discharge with inlet 3x installation.In addition, in Figure 24, only represent a cylinder 4.

Here; Shown in figure 25; Form the first positioning part 3B at housing 3; Form respectively on 4 cylinders 4 with the situation of the second positioning part 4B of first positioning part 3B corresponding mode configuration under, 4 cylinders 4 are positioned through the first positioning part 3B and the second positioning part 4B for housing 3, make that each each the center of piston crown 5h of axle center and 4 pistons 5 of 4 cylinders 4 is consistent.

Then, (with reference to Figure 26) such as bearing support 10, housing lid 15 are installed.Specifically, motor reel 2s is inserted pedestal 21, pedestal 21 is inserted bearing 22b, use a plurality of fixing bolt 20p to be installed on the first parts 3f bearing support 10, housing lid 15.Here; Between the discharge of the first parallel portion 7f of the first parts 3f and bearing support 10 is with inflow entrance 10i; Install two and be used to guarantee bubble-tight O type ring 20j, installation is used to guarantee bubble-tight Sealing 20m and O type ring 20n between bearing support 10 and housing lid 15.In addition, in Figure 26, expression be that the state that 4, one cylinders 4 of three cylinders also are not mounted is installed.So reciprocating compressor 1 shown in Figure 1 is assembled as stated.

(relation of the angle of oscillation of piston and the length of piston rod)

Shown in Figure 29 (a); Under the constant situation of the eccentric distance e of the center O of center C that makes eccentric shaft 17 and motor reel 2s; Become length L when the length L of piston rod 5P shortens ' time, the angle of oscillation of piston is that the tiltangle of piston rod 5P becomes big, becomes tiltangle '.Thereby when the length L of piston rod 5P shortened, piston crown 5h becomes big with respect to the inclination of cylinder 4, and was big thereby the gap of piston crown 5h and cylinder 4 becomes.

On the other hand; Shown in Figure 29 (b); Under the little situation of the eccentric distance e of the center O of center C that makes eccentric shaft 17 and motor reel 2s, become length L when the length L of piston rod 5P shortens ' time, the tiltangle of piston rod 5P is maintained roughly the same tiltangle.Thereby when the length L of piston rod 5P shortened, piston crown 5h was roughly the same with respect to the inclination of cylinder 4, thereby the gap of piston crown 5h and cylinder 4 is kept.Thus, can guarantee the tightness of the pressing chamber 4j in the cylinder 4 and the miniaturization of realization compressor 1.

(relation of the sliding distance of piston and the length of piston rod)

Shown in Figure 29 (a); Under the constant situation of the eccentric distance e of the center O of center C that makes eccentric shaft 17 and motor reel 2s; Become length L if the length L of piston rod 5P is shortened ', as stated, the tiltangle of piston rod 5P becomes becomes tiltangle greatly '; It is big that thereby the tilt angle of the relative cylinder 4 of piston crown 5h becomes, and the sliding distance of piston 5 is that the center a of piston crown 5h and the distance H change of cylinder 4 become distance H greatly thus '.

On the other hand, shown in Figure 29 (b), under the little situation of the eccentric distance e of the center O of center C that makes eccentric shaft 17 and motor reel 2s; Become length L when the length L that makes piston rod 5P shortens ' time; As stated, the tiltangle of piston rod 5P is maintained roughly the same, and piston crown 5h is roughly the same with respect to the inclination of cylinder 4 thus; So the sliding distance of piston 5, promptly the distance H of the center a of piston crown 5h and cylinder 4 is maintained distance H.Thus, also can the sliding distance of piston 5 be kept constant, therefore, can guarantee to be configured in the sealing of the sealed member 28 on the piston 5 for a long time even the length of piston rod 5P shortens.

(torque of motor)

In the reciprocating compressor with a plurality of cylinders 1, make under the fixing situation of the rotating speed of piston, pressure and stroke, internal diameter (bore diameter) X of change piston is so that total discharge flow rate is identical.At this moment; Shown in figure 30; At the number of cylinder is under 1,2 and 3 s' the situation; The torque of motor reel 2s follows the rotation of motor reel 2s to change with the mode of describing the curve of cyclical fluctuations respectively, angle of swing be about 100 the degree the moment become maximum, angle of swing be about 200 the degree the moment become minimum.On the other hand; In the number of cylinder is this mode of execution of 4; 4 pistons 5 keep respectively 90 the degree phase difference in carry out air-breathing compression stroke, thereby the power that when the compression stroke of piston 5, is applied on the piston crown 5h cancel out each other, therefore; The torque of motor reel 2s produces change along with the rotation of motor reel 2s hardly, describes roughly straight line.Thus, in reciprocating compressor,, can significantly suppress the change of torque than reciprocating compressor with 1,2 and 3 cylinder with 4 cylinders.

(oxygen concentrating device)

The oxygen concentrating device of the reciprocating compressor with this mode of execution then, is described.Oxygen concentrating device is used for resuscitation apparatus illness patient is waited the domiciliary oxygen therapy that high oxygen concentration is provided.In addition; In the oxygen concentrating device of reciprocating compressor with this mode of execution; Shown in figure 32, seal container 330 has housing 3, be installed in cylinder 4 on the housing 3, cover cylinder 4 skull 4h, be configured in housing 3 the upper end bearing support 10 and be installed in the housing lid 15 on the bearing support 10.

Shown in figure 31; In oxygen concentrating device 100; Dispose and discharge gas flow path Z; It is used for the gas that comprises nitrogen (medium is used in cooling) of discharging from contactor 304A, 304B through gas discharge section 303c, 303d is guided to seal container 330 inside of reciprocating compressor 1, discharges to the outside afterwards.

Specifically, oxygen concentrating device 100 comprises: be used for removing the membrane filter 311 from the dust of outside inhaled air; The reciprocating compressor 1 of the air that compression is inhaled into through membrane filter 311; Be configured in the control valve 303 on the gas flow path of ejection pressurized air side of reciprocating compressor 1; The first absorbing cylinder 304A, it is to be supplied to pressurized air, to take in the example of contactor of the sorbent of the nitrogen of absorption this pressurized air from reciprocating compressor 1 through control valve 303; Be configured in the one-way valve 305A on the gas flow path in downstream side of the first absorbing cylinder 304A; The second absorbing cylinder 304B, it is an example taking in the contactor of the sorbent that the airborne nitrogen that is supplied to from reciprocating compressor 1 through control valve 303 is adsorbed; Be configured in the one-way valve 305B on the gas flow path in downstream side of the second absorbing cylinder 304B; Be configured in the blow down valve 306 between the gas flow path in downstream side of first, second absorbing cylinder 304A, 304B; The oxygen jar 307 that is connected with first, second absorbing cylinder 304A, 304B through one-way valve 305A, 305B; The reduction valve 308 that oxygen concentrated gas from oxygen jar 307 is reduced pressure; Be used to adjust from the flow regulator 309 of oxygen jar 307 through the flow of the oxygen concentrated gas of reduction valve 308 supplies; Be connected with the ejiction opening joiner 310 of sleeve pipe (not shown) that is used for providing through flow regulator 309 adjusted the oxygen concentrated gas of flow to the people.

Reciprocating compressor 1 is configured in the sound-proof box 322, in the side of this sound-proof box 322 cooling fan 323 is installed.Utilize the reciprocating compressor 1 in 323 pairs of sound-proof boxes of this cooling fan 322 to cool off.In addition, oxygen concentrating device 100 has the control device 320 of the fan 323 etc. of control control valve 303, blow down valve 306 and cooling usefulness.Through the motor 2 (with reference to Fig. 3) in the control device 320 driving reciprocating compressors 1.

In addition, control valve 303 has: the first port 303a that an end is connected with the pressurized air stream of reciprocating compressor 1, the other end is connected with the first absorbing cylinder 304A; The second port 303b that one end is connected with the pressurized air stream of reciprocating compressor 1, the other end is connected with the second absorbing cylinder 304B; One end and the 3rd port 303c that the discharge gas flow path Z of reciprocating compressor 1 is connected, the other end is connected with the first absorbing cylinder 304A; And an end and the discharge gas flow path Z of reciprocating compressor 1 is connected, the other end is connected with the second absorbing cylinder 304B the 4th port 303d.

In addition, control device 320 is made up of microcomputer and imput output circuit etc., control blow down valve 306 and fan 323.Control device 320 has the function of the switch control portion of control first switching part and second switching part.

In the oxygen concentrating device 100 of said structure; Utilize control device 320; Open the first port 303a and the 4th port 303d of control valve 303; Close the second port 303b and the 3rd port 303c, make reciprocating compressor 1 operation (pressurization stroke of the first absorbing cylinder 304A, the decompression stroke of the second absorbing cylinder 304B).Then, 1 pair of reciprocating compressor compresses through membrane filter 311 inhaled airs.Through reciprocating compressor 1 compressed air, pressurized in the first absorbing cylinder 304A through the first port 303a of control valve 303, make airborne nitrogen be adsorbed agent absorption, generate high oxygen concentration.The high oxygen concentration that generates at the first absorbing cylinder 304A is stored in oxygen jar 307 through one-way valve 305A.Like this, be stored in oxygen concentrated gas in the oxygen jar 307 after reducing pressure,, be ejected from ejiction opening joiner 310 through flow regulator 309 adjustment flows through reduction valve 308.

At this moment, the second absorbing cylinder 304B side makes nitrogen from the sorbent desorb through decompression, will comprise the gas of the nitrogen of desorb, discharges to the outside through the 4th port 303d and the reciprocating compressor 1 of control valve 303.

Here; In the pressure process of the first absorbing cylinder 304A, the part of the high oxygen concentration that generates at the first absorbing cylinder 304A is supplied to the second absorbing cylinder 304B through blow down valve 306, under the state that the pressure in making the second absorbing cylinder 304B promotes slightly; Utilize control device 320; Open the second port 303b and the 3rd port 303c of control valve 303, close the first port 303a and the 4th port 303d, switch to the pressure process of the second absorbing cylinder 304B.Like this, repeat following circulation, promptly alternately carry out in first, second absorbing cylinder 304A, 304B use the absorption and the desorb of nitrogen of sorbent.

At this moment, in reciprocating compressor 1, shown in Figure 32 (a), be connected with an end of pipe 361 on suction port 10j with motor reel 2s quadrature and in the cooling of the sidepiece that is formed at bearing support 10 (right side among Figure 32 (a)), to flow into nitrogenous gas.And, shown in Figure 32 (b), the cooling of the sidepiece (right side among Figure 32 (b)) that is formed on housing 3 is connected through discharge tube 362 with exhaust port 324 with exhaust port 3j.In addition, in this mode of execution, be formed with cooling with the sidepiece of the bearing support 10 of suction port 10j be formed with the sidepiece that cools off with the housing 3 of exhaust port 3j, adjacent on the Zhou Fangxiang of motor reel 2s.

And; Be formed with and discharge gas flow path Z; This is discharged gas flow path Z and utilizes pipe 361 and bearing support 10 and discharge tube 362 and housing 3; The gas that comprises nitrogen that to discharge from first, second absorbing cylinder 304A of oxygen concentrating device shown in Figure 31 100,304B, discharge to the outside afterwards seal container 330 inside that the 3rd port 303c and the 4th port 303d through control valve 303 guides to reciprocating compressor 1.At this moment, discharge the inside that gas flow path Z is configured at least one side of housing 3 and 4 cylinders 4.

In the oxygen concentrating device 100 of said structure; From first, second absorbing cylinder 304A of oxygen concentrating device 100, the gas that comprises nitrogen that 304B discharges; After in the seal container 330 of managing 361 inflow reciprocating compressors 1; Through form discharging gas flow path Z, each part such as the bearing 17b of cooling eccentric shaft 17, bearing 22a, 22b, piston 5, and discharge to the outside.In this mode of execution, shown in figure 32, discharge gas flow path Z the seal container 330 of reciprocating compressor 1 in from above to below ground formation.In addition, discharge gas flow path Z also be formed on gap, eccentric shaft 17 and the bearing 17b of 4 in 4 cylinders gap etc., be configured in the gap between each interior part of seal container 330.

[characteristic of the present invention]

The reciprocating compressor 1 of this mode of execution has following characteristic.

In the reciprocating compressor 1 of this mode of execution; Through the number of cylinder 4 is increased to 4 from 2, can in the rotating speed that keeps each piston 5 and whole ejection flow, stroke be shortened, therefore; Even piston rod 5P shortens, also can keep the pendulum angle θ of piston 5.Thus, can guarantee the tightness of pressing chamber 4j and the miniaturization of realization compressor.In addition, shorten, the swinging distance of piston crown 5h is diminished, therefore, can guarantee to be configured in the sealing of the sealed member 28 of piston crown 5h for a long time through making stroke.And, be 4 through making cylinder 4, heat diffusion area significantly enlarges, and the temperature that can suppress pressing chamber 4j rises, and can significantly improve compression efficiency.

In addition; When overlooking, on the straight line at the center through motor reel 2s and with the straight line at this straight line quadrature and the center through motor reel 2s on, dispose 2 cylinders 4 respectively; Thereby, whole interval of two adjacent in a circumferential direction cylinders 4 is diminished.In addition, between the piston crown 5h of two adjacent pistons 5, be difficult to interfere, therefore, piston rod 5P further shortened.Thereby, can realize the further miniaturization of compressor.

In addition, the air-breathing compression stroke of 4 pistons 5 is carried out in the phase difference of keeping 90 degree respectively, thereby when compression stroke, the power that is applied to the piston crown 5h of 4 pistons 5 is cancelled out each other, and can suppress the change of the torque of motor reel 2s.Can significantly improve compression efficiency thus.In addition, also cancel out each other, can realize low noise and low vibrationization from the suction aspirant that 4 pressing chambers produce.

In addition, be 1 through making four pistons, 5 chimeric eccentric shafts 17, the interval of the 5R of bar portion of the piston 5 of motor reel 2s direction is diminished.In addition, the masterpiece in the time of can the compression stroke from certain piston 5 being transferred to suction stroke transmits for the power that helps other piston 5 motions effectively, therefore, can reduce the transmission loss of power.Thereby can further improve compression efficiency.

In addition; Housing 3 has the first positioning part 3B; 4 cylinders 4 have the second positioning part 4B corresponding with the first positioning part 3B respectively, thereby can be for 4 cylinders 4 in housing 3 location, make that each axle center of 4 cylinders 4 is consistent with the center of the piston crown 5h of piston 5; The eccentric wear that therefore, can suppress sealed member 28.

In addition, at the axle direction of motor 2s, configuration adjustment component 34 between the 5R of bar portion of 4 pistons 5, thereby position that can the 5R of regulating lever portion.Therefore, can make the axle center of cylinder 4 accurately consistent, therefore can suppress the eccentric wear of sealed member 28 with the axle center of the piston crown 5h of piston 5.

In addition; Between each main part 4a and plat part 4p of 4 cylinders 4, clip elastic member 4A; Thereby, promptly can make each upper dead center and gap smaller cylinder 4 of piston crown 5h of 4 pistons 5 only through based on linking the adjusting that main part 4a and the torque of the bolt of plat part 4p are managed.Thereby can make the stable performance of compressor, can further improve compression efficiency.

In addition; Through between each piston crown 5h and pressing plate 27 of 4 pistons 5, clipping Spacer 30; Thereby only through based on linking the adjusting that piston crown 5h and the torque of the bolt of pressing plate 27 are managed, each the piston crown 5h that promptly can make 4 pistons 5 is in upper dead center and gap smaller cylinder 4.Thereby can make the stable performance of compressor, can further improve compression efficiency.

Converge suction passage 9 and converge the arbitrary at least side who discharges in the stream 8 through setting, can converge the stream between a plurality of cylinders.In addition; Converge suction passage 9 with converge the arbitrary at least side who discharges in the stream 8 be configured to in the axial axle zone 31 of motor reel 2s and its neighboring area 32 any is overlapping at least, thereby the maximization of the compressor integral body that can suppress to cause owing to the setting that converges stream.As a result, utilize this structure, can when suppressing maximization, converge the stream between a plurality of cylinders.

In addition, in this mode of execution, be provided with 6,4 of 5,4 suction passages of 4,4 pistons of 4 cylinders and discharge stream 7, as long as but their quantity is respectively a plurality of, be not limited to 4.

In addition, the above-mentioned suction passage 9 of converging was discharged stream 8 to form with axle zone 31 is the ring-type stream at center with above-mentioned converging.To converge stream be the ring-type stream through making like this, can concentrate stream compactly, can easily suppress to maximize.In addition, particularly discharge stream 8 and be ring-type, can guarantee the heat diffusion area of liquid, can improve compression efficiency through making to converge.

In addition, be formed and discharge stream 8 converging of ring-type stream and form along the planar ground vertical and expand with the axle direction of motor reel 2s.Therefore, suppressing by when converging the maximization of discharging the compressor that stream 8 causes, can easily guarantee to be used to improve compression efficiency the heat diffusion area of fluid.

In addition, also have the bearing support 10 of the shaft end 2t that is configured in motor reel 2s, converge discharge stream 8 and be formed at this bearing support 10.Therefore, parts and its space on every side through using bearing supporting usefulness effectively can suppress to maximize and converge the stream between a plurality of cylinders effectively.

In addition, 4 discharge streams 7 have the axial first parallel portion 7f along motor reel 2s respectively.Like this, discharge stream 7 and have axial part, discharge stream 7 thereby can dispose efficiently along motor reel 2s.

In addition, the first parallel portion 7f is formed on the inside of housing 3.Like this; Be formed on the inside of housing 3 through the first parallel portion 7f that will discharge stream 7, there is no need to be provided with in addition pipe and wait the parts that are used to form stream, perhaps; The parts that are used to form stream that need to form are in addition reduced; Therefore, can in the maximization that suppresses compressor, the part number tailed off, stream be discharged in configuration more efficiently.In addition, because housing 3 self becomes radiating part,, can further improve compression efficiency so can significantly enlarge heat diffusion area.

In addition; Motor 2 has main part 2b, converges suction passage 9 and discharges stream 8 with converging, and on the axle direction of motor reel 2s, is configured in the both sides that clip 4 cylinders 4; Converge and discharge the shaft end 2t side that stream 8 is configured in motor reel 2s, converge suction passage 9 and be configured in main part 2b side.Therefore, can be in the maximization that suppresses compressor, configuration efficiently converge suction passage 9 with converge discharge stream 8 the two.In addition, converge suction passage 9 through isolation and discharge stream 8, can prevent that heat from transmitting, can further improve compression efficiency between the two with converging.

In addition, a plurality of suction passages 6 have the axial second parallel portion 6f along motor reel 2s respectively.Like this, in this reciprocating compressor 1, suction passage 6 has the axial part along motor reel 2s, thereby can dispose suction passage 6 efficiently.

In addition; Housing 3 comprises the first parts 3f and the second parts 3s; A plurality of discharge streams 7 form with the mode of the inside through the first parts 3f; A plurality of suction passages 6 form with the mode of the inside through the second parts 3s, and the first parts 3f and the second parts 3s are independent respectively to be formed, and the pyroconductivity of the thermal conductivity ratio second parts 3s of the first parts 3f is high.Like this; With suction passage 6 with discharge stream 7 and be respectively formed at the independently inside of the second parts 3s and the first parts 3f; And first parts 3f different with the pyroconductivity of the second parts 3s, thereby can prevent that the heat of discharging stream 7 from reaching suction passage 6, can further improve compression efficiency.In addition, in this mode of execution, the first parts 3f is metal, and pyroconductivity is high, therefore can carry out the heat radiation of fluid efficiently, can further improve compression efficiency.

In addition, with 4 pistons 5 with separately piston crown 5h towards staggering 90 degree and arrange in order along the motor reel direction with respect to a motor reel 2s and to install.Therefore; From the nearest cylinder 4 (corresponding with the piston 5 of main part side) of main part 2b of motor 2, the space of the shaft end 2t side of the motor 2s of its cylinder 4 in the wall portion of housing 3, bearing support 10 and housing lid 15 is than leaving the big of main part 2b cylinder 4 (corresponding with the piston 5 of shaft end side) farthest.So, in reciprocating compressor 1, utilize its space to form exhaust port 10h (with reference to Fig. 1,2,3).Therefore, can not need other parts ground, exhaust port 10h is disposed at the position of discharging stream 8 of converging near bearing support 10 inside, and can be disposed at the inconspicuous appropriate location of the reason that can not become maximization.

In addition, the tributary circuit 7s along gravitational direction is set on each of a plurality of drain passageways, discharge at this and apply adhesive 7A on stream, thereby the abrasion powder that can prevent sealed member is discharged.

In addition, according to the oxygen concentrating device 100 of this mode of execution, can improve durability through cooling off in the reciprocating compressor 1 to closed type, miniaturization, the low rotationization of the fan 323 through cooling usefulness can reach energy-conservationization and quietization.In addition; Inside temperature through making reciprocating compressor 1 descends; Can suppress to be supplied to the compressed-air actuated temperature rising of first, second absorbing cylinder 304A, 304B; Therefore can prevent the decline of the adsorption efficiency of the sorbent of nitrogen in first, second absorbing cylinder 304A, 304B, thereby the oxygen concentration that can prevent the block concentrated gas descends.

In addition, comprise, discharge gas flow path Z, can improve the durability of the sealed member 28 of the piston crown 5h that can produce high heat especially through forming from the gas of the nitrogen of above-mentioned first, second absorbing cylinder 304A, 304B discharge.

(second mode of execution)

Second mode of execution of reciprocating compressor of the present invention then, is described.Wherein, to marking identical symbol in the drawings, omit its explanation with the same part of above-mentioned mode of execution.Figure 33 is the synoptic diagram of the reciprocating compressor of expression second mode of execution of the present invention, is to overlook synoptic diagram (a), (b) is that Y is to looking the side synoptic diagram.Figure 34 is that the P-P of Figure 33 (b) is to looking simplified schematic cross-sectional view.Figure 35 is that the Q-Q of Figure 34 is to looking simplified schematic cross-sectional view.Figure 36 is that the R-R of Figure 33 (a) is to looking simplified schematic cross-sectional view.Figure 37 is that the S-S of Figure 33 (a) is to looking simplified schematic cross-sectional view.

In the reciprocating compressor 101 of this mode of execution,, be formed with the first parallel portion 7f and the second parallel portion 106f in the inside of the metallic parts that are equivalent to the above-mentioned first parts 3f.And, follow the different of housing 103 and above-mentioned mode of execution, the position of through hole etc. also changes (omitting diagram) to some extent in the cylinder 104.

A plurality of discharge streams 7 in the reciprocating compressor 101 have along the axial first parallel portion 7f of motor reel 2s (same with above-mentioned mode of execution respectively.With reference to Figure 33 (a), Figure 36).In addition, a plurality of suction passages 106 have the axial second parallel portion 106f (with reference to Figure 33 (a), Figure 37) along motor reel respectively.

And; A pair of first parallel portion 7f and a pair of second parallel portion 106f are formed on the inside of housing 103; The a pair of first parallel portion 7f is configured to clip motor reel 2s mutually opposed (with reference to the dotted line part of Figure 33 (a)); And a pair of second parallel portion 106f is configured to clip motor reel 2s mutually opposed (with reference to the dot and dash line portion of Figure 33 (a)).And a pair of first parallel portion 7f and a pair of second parallel portion 106f are configured to the first parallel portion 7f adjacent with the second parallel portion 106f (with reference to Figure 33 (a), Figure 36,34).

In addition, housing 103 is different with above-mentioned mode of execution, and the housing 103 that is equivalent to first parts of above-mentioned mode of execution has 4 suctions with outlet 103y (with reference to Figure 37).And, converge suction passage 109 and be formed on the inner space (with reference to Figure 34～34) of on the motor reel direction, more leaning on main part 2b side of housing 103 than piston 5.And, be formed on the outside wall portions (with reference to Figure 35) of housing 103 to this suction port 103z that converges suction passage 109.

In the reciprocating compressor 101 that constitutes like this, discharge stream 7 is roughly the same with above-mentioned mode of execution, but suction passage 106 is different with above-mentioned mode of execution.A plurality of suction passages 106 form with the mode of the inside through housing 103, and specifically, the second parallel portion 106f is formed on the inside of housing 103.The inside (pressing chamber 4j) of each of a plurality of suction passages 106 and a plurality of cylinders 104 is connected (with reference to the dot and dash line portion of the expression suction passage 106 of Figure 37).

Air at first gets into the inside of housing 103 from the suction port 103z that is formed on housing 103, flow into from here and converge suction passage 109 (with reference to Figure 35).Below, each suction passage 106 is described, promptly until the stream of cylinder 104 inside (pressing chamber 4j).The inside of housing 103 is formed to be converged suction passage 109 and is connected to two second parallel portion 106f, and the air that converge in the suction passage 109 are sent to two second parallel portion 106f (with reference to Figure 37).And, through the air of each second parallel portion 106f, be sent to first Room through through hole (the through hole 4b that is equivalent to above-mentioned mode of execution) from sucking with outlet 103y.And the air of first Room is sent to pressing chamber 4j through through hole 4c.A suction passage 106 constitutes in the above described manner.

As stated; In the reciprocating compressor 101 of this mode of execution; A plurality of discharge streams 7 have the axial first parallel portion 7f along motor reel 2s respectively; A plurality of suction passages 106 have the axial second parallel portion 106f along motor reel 2s respectively; A pair of first parallel portion 7f and a pair of second parallel portion 106f are formed on the inside of housing 103, and it is mutually opposed that a pair of first parallel portion 7f is configured to clip motor reel 2s, and a pair of second parallel portion 106f to be configured to clip motor reel 2s mutually opposed.Like this; The two is formed on the inside of housing 103 first parallel portion 7f through will discharging stream 7 and the second parallel portion 106f of suction passage 106; Can effectively not use housing 103 lavishly, can further suppress effectively to maximize and converge the stream between a plurality of cylinders.

(the 3rd mode of execution)

The 3rd mode of execution of reciprocating compressor of the present invention then, is described.In addition, to marking identical symbol in the drawings, and omit its explanation with the same part of above-mentioned mode of execution.Figure 38 is the schematic representation of the reciprocating compressor of explanation the 3rd mode of execution of the present invention.Figure 39 is the action specification figure of the reciprocating compressor of Figure 38.Figure 40 is the figure of relation at angle of swing and PV value and head tilt angle of the reciprocating compressor of expression Figure 38.Figure 41 is the longitudinal section of the existing reciprocating compressor of explanation.

Shown in figure 38, the reciprocating compressor of this mode of execution when 4 pistons 5 are positioned at lower dead centre, is non-right angle along the sealing plane S of sealed member 228 with respect to the datum plane R of the center C of center O that comprises motor reel 2s and eccentric shaft 17.

Shown in figure 38, cylinder 204 has main part 204a and plat part 204p, and plat part 204p is fixed on the main part 204a, forms pressing chamber 204j.Between the main part 204a and plat part 204p of this cylinder 204,204A seals with elastic member.Cylinder 204 is fixed on the housing (not shown).

On the other hand, in cylinder 204, dispose piston 205.In this piston 205, piston crown 205h and the 205R of bar portion become one, and piston crown 205h is configured with reciprocating mode in cylinder 204, can freely swing.End face S at the piston crown 205h of piston 205 is the part that sealing plane S uploads the sealed member 228 of putting ring-type, makes this part by the end face S of the piston crown 205h of piston 205 and pressing plate 227 clampings and fix.Another part of sealing parts 228 is outstanding from piston crown 205h and pressing plate 227, contacts with the internal surface of cylinder 204, seals.And pressing plate 227 is fixed on the piston crown 205h through screw 230.

Shown in figure 38; The end face S of the piston crown 205h of piston 205; Promptly along the sealing plane S of the sealed member 228 of ring-type, when piston 205 is positioned at lower dead centre, be non-right angle with respect to the datum plane R of the center C of center O that comprises motor reel 2s and eccentric shaft 17.In more detail, when piston 205 was positioned at lower dead centre, the end face S of the piston crown 205h of piston 205 promptly along the sealing plane S of the sealed member 228 of ring-type, tilted 88.5 ° with respect to said reference plane R.That is, when piston 205 was positioned at lower dead centre, the end face S of the piston crown 205h of piston 205 (sealing plane S) with respect to 1.5 ° of the plane inclinations vertical with datum plane R, had 1.5 ° tilt angle with respect to the plane vertical with the central shaft of cylinder 204.Thus, shown in figure 40, the PV value be roughly the angle of rotation of maximum motor reel 2s about 135 ° near promptly about 149 °, be that the tilt angle of end face S of the piston crown 205h of piston 205 is zero with respect to the tilt angle on the plane vertical with datum plane R.

The end face 241 of the pressing chamber 204j of cylinder 204, when piston 205 is positioned at lower dead centre and upper dead center, parallel with the end face S of the piston crown 205h of piston 205.That is, the end face 241 of the pressing chamber 22 of cylinder 204 is with respect to 1.5 ° of the plane inclinations vertical with the central shaft of cylinder 204.Thus, when piston 205 is positioned at upper dead center, between the upper surface of the end face 241 of the pressing chamber 22 of cylinder 204 and pressing plate 227, can produce the dead band, thereby improve compression efficiency.

With reference to Figure 38,39 and Figure 40 the action of the reciprocating compressor of said structure is described.

In Figure 40, transverse axis is represented the angle of swing of motor reel 2s, and the longitudinal axis on right side is represented the end face S of piston crown 205h of piston 205 with respect to the tilt angle on the plane vertical with the central shaft of cylinder 204, and the longitudinal axis in left side is represented the PV value.

In reciprocating compressor, begin from state shown in Figure 38, through the driving of motor 2; Motor reel 2s turns clockwise; Shown in Figure 39 (a)～(e), piston 205 moves back and forth in swing, carries out air-breathing, the compression of gases such as air.

At this moment; Shown in curve M among Figure 40; At lower dead centre (0 ° of the angle of rotation of motor reel) and upper dead center (180 ° of the angle of rotation of motor reel 2s); The end face S of the piston crown 205h of piston 205 promptly along the sealing plane S of the sealed member 228 of ring-type, tilts 1.5 ° with respect to the plane vertical with datum plane R (plane vertical with the central shaft of cylinder 204).And, along with the rotation of motor reel 2s, like Figure 39 and shown in Figure 40, the end face S of the piston crown 205h of piston 205, promptly the tilt angle (head tilt angle) along the sealing plane S of the sealed member 228 of ring-type changes.

Curve M according to Figure 40 can be known; In this embodiment; The tilt angle of the end face S of the piston crown 205h of piston 205 is the absolute value at the tilt angle of sealing plane S; In compression stroke than curve M ' shown in the tilt angle of end face S of piston crown 205h of piston 205 of existing Figure 41 little, in suction stroke than curve M ' shown in the tilt angle of end face S of piston crown 205h of piston 205 of existing Figure 41 big.

Like this, big in the PV value, to the big compression stroke of the load of sealed member 228 in, the absolute value at the tilt angle of the sealing plane S of this mode of execution (curve M of Figure 40); Littler than the absolute value at the tilt angle of the sealing plane S of the existing example of Figure 41 (curve M of Figure 40 '), therefore, sealed member 228 contacts substantially uniformly with the internal surface of cylinder 204; Can prevent the part abrasion of sealed member 228; Realize the long lifetime, and, the gap of 228 of cylinder 204 and sealed members can be reduced; Prevent air leakage, improve compression efficiency.

In addition; In suction stroke; The PV value is whole than medium and small in compression stroke; Therefore duty ratio to sealed member 228 is less, even the tilt angle of the end face S of the piston crown 205h of piston 205 is that the absolute value at the tilt angle of sealing plane S becomes big, problems such as the abrasion of the part of sealed member 228, leakage can not produce basically yet.

In addition, in the above-described embodiment, sealing plane S is with respect to the absolute value at the tilt angle on the plane vertical with datum plane R; Than medium and small in suction stroke, therefore, sealed member 228 roughly contacts with the internal surface of cylinder uniformly when the high load of sealed member 228 in compression stroke; Can prevent the part abrasion of sealed member 228, realize the long lifetime, and; Can reduce the gap of 228 of cylinder 204 and sealed members, prevent air leakage, improve compression efficiency.

In addition, in the above-described embodiment, the PV value become the angle of rotation of maximum motor reel 2s about 135 ° near; The end face S of the piston crown 205h of piston 205 is that sealing plane S is the right angle with respect to datum plane R, and at busy hour, sealing plane S disappears with respect to the inclination of the central shaft of cylinder 204; Therefore can prevent the part abrasion of sealed member 228, realize the long lifetime, and; Can prevent air leakage, improve compression efficiency.

In addition, in the above-described embodiment, utilize pressing plate 227, sealed member 228 is installed on the end face S of piston crown 205h of piston 205, therefore, can adjust the tilt angle of the end face S of piston crown 205h, set the inclination of sealing plane S simply.

In addition; In the above-described embodiment; The end face S of the piston crown 205h of piston 205 is parallel with the end face 241 of the pressing chamber 204j of cylinder 204, can reduce the dead band of 241 of end faces of pressing chamber 204j of upper surface and the cylinder 204 of pressing plate 227, improves compression efficiency.

More than, with reference to description of drawings mode of execution of the present invention, be not limited to these mode of executions but be construed as concrete structure.Scope of the present invention is not to represent through the explanation of above-mentioned mode of execution, but is represented by the scope of claim, and is included in and the impartial meaning of the scope of claim and the whole changes in the scope.

For example, in the above-described embodiment, be provided with converge suction passage with converge discharge stream the two, as long as but be provided with the arbitrary at least side in them, for example, also can not have and converge a suction passage and a side who converges in the discharge stream.

In addition; In the above-described embodiment; Discharge stream and have axial first parallel portion along motor reel, suction passage has axial second parallel portion along motor reel, but also can not have first parallel portion, second parallel portion at discharge stream and suction passage.In addition, also can only be formed with the arbitrary side in first parallel portion and second parallel portion at discharge stream and suction passage.

In addition, in the above-described embodiment,, clip sealed member 28 and Spacer 30, but bear at sealed member 28 under the situation of function of Spacer 30, also can only clip sealed member 28 at piston crown 5h with through between the pressing plate 27 of bolt.

In addition; In the above-described embodiment; Be formed with cooling with the sidepiece of the bearing support 10 of suction port 10j be formed with the sidepiece of cooling with the housing 3 of exhaust port 3j, be configured on the Zhou Fangxiang of motor reel 2s adjacently, concern but can be configured to have any position with motor reel 2s; For example, also can be with respect to motor reel 2s arranged opposite.

In addition, in the above-described embodiment, cooling is formed on the sidepiece of bearing support 10 with suction port 10j, as long as but can the inside of cooling with medium suction discharge gas flow path Z then be can be formed in any position of reciprocating-type compressor.In addition, cool off the sidepiece that is formed on housing 3 with exhaust port 3j, as long as but can use medium from discharging gas flow path Z discharge cooling, then can be formed in any position of reciprocating-type compressor.

In addition, in the above-described embodiment, as the fluid that is inhaled into reciprocating compressor, but reciprocating compressor also can constitute and sucks the gaseous fluid (for example nitrogen, oxygen, carbon dioxide, refrigerant etc.) outside this and compress with air.

In addition; In above-mentioned the 3rd mode of execution; Sealed member 228 usefulness pressing plates 227 are fixed on the piston crown 205h of piston 205; But also can not use pressing plate, in the piston crown setting of piston along the not shown groove with respect to the face of the plane inclination vertical, the sealed member of chimeric ring-type in this groove with the central shaft of cylinder.Importantly, the sealing plane along the sealed member of ring-type at the upper dead center and the lower dead centre of piston, gets final product with respect to the plane inclination vertical with the central shaft of cylinder.

In addition, in above-mentioned the 3rd mode of execution, the tilt angle with respect to the plane vertical with the central shaft of cylinder 204 of the end face S of the piston crown 205h of piston 205 is 1.5 °, but is not limited to 1.5 ° certainly.

In addition, in the above-described embodiment,,, also can use crank pin as bent axle as eccentric shaft though do not illustrate.

In addition, in above-mentioned the 4th mode of execution, explained to have the oxygen concentrating device 100 of totally two first, second absorbing cylinders, but also can apply the present invention to have in the oxygen concentrating device 100 of the absorbing cylinder more than or three.But; Because have plural absorbing cylinder as contactor; Switch a plurality of absorbing cylinders and alternately repeat absorption and desorb, comprise by the gas of the nitrogen of desorb thereby discharge continuously, so can cool off efficiently in the reciprocating compressor to closed type.

In addition; In above-mentioned the 4th mode of execution; Explained in order resuscitation apparatus illness patient to be waited the oxygen concentrating device 100 carry out home oxygen therapy and to use, but oxygen concentrating device 100 is not limited thereto, can applies the present invention to provide all spectra of the oxygen of high concentration.

Utilizability on the industry

Through utilizing the present invention, can realize high efficiency, long lifetime, miniaturization and and low noise, low vibration.

Claims (25)

1. a reciprocating compressor is characterized in that, comprising:

Motor (2) with motor reel (2s);

Take in the housing (3) of said motor reel;

The Zhou Fangxiang of said motor reel side by side configuration and respectively along with 4 cylinders (4) of the direction configuration of the axle direction quadrature of said motor reel;

Be formed with 4 pistons (5) of piston crown (5h) and bar portion (5R) respectively; Said piston crown (5h) can be entrenched in to to-and-fro motion on each of said 4 cylinders, and said bar portion (5R) can be entrenched on the eccentric shaft (17) that is fixed on the said motor reel rotatably;

Discharge streams (7) for 4 that are connected respectively with the inside of said 4 cylinders; And

4 suction passages (6,106) that are connected respectively with the inside of said 4 cylinders,

Have first parallel portion (7f) with 2 said discharge streams that first cylinder of adjacency is connected with second cylinder, said first parallel portion (7f) is configured between said first cylinder and second cylinder, along the axle direction of motor reel and be formed on the inside of said housing;

Total another first parallel portion (7f) of 2 said discharge streams that are connected with four-cylinder with the 3rd cylinder, said another first parallel portion (7f) be configured between said the 3rd cylinder and the four-cylinder, along the axle direction of motor reel and be formed on the inside of said housing;

2 said suction passages that are connected with the 3rd cylinder with second cylinder of adjacency have the second parallel portion (6f; 106f); (6f 106f) is configured between said second cylinder and the 3rd cylinder, along the axle direction of motor reel and be formed on the inside of said housing said second parallel portion;

Have another second parallel portion (6f with 2 said suction passages that first cylinder is connected with four-cylinder; 106f); (6f 106f) is configured between said first cylinder and the four-cylinder, along the axle direction of motor reel and be formed on the inside of said housing said another second parallel portion.

2. reciprocating compressor as claimed in claim 1 is characterized in that:

Said 4 cylinders are: when overlooking, be configured in 2 cylinders on the straight line at the center through said motor reel and be configured in 2 cylinders on the straight line with said straight line quadrature and the center through said motor reel.

3. according to claim 1 or claim 2 reciprocating compressor is characterized in that:

The piston crown of said 4 pistons carries out air-breathing compression stroke respectively in the phase difference of keeping 90 degree.

4. according to claim 1 or claim 2 reciprocating compressor is characterized in that:

Said eccentric shaft is 1.

5. according to claim 1 or claim 2 reciprocating compressor is characterized in that:

Have the housing (3) of taking in said motor reel,

Be formed with first positioning part (3B) at said housing,

Said four cylinders be formed with respectively with second positioning part (4B) of said first positioning part corresponding mode configuration,

Said four cylinders are positioned by said first positioning part and said second positioning part for said housing, make that each each the center of piston crown of axle center and said 4 pistons of said 4 cylinders is consistent.

6. according to claim 1 or claim 2 reciprocating compressor is characterized in that:

At the axle direction of said motor reel, between the bar portion of said 4 pistons, dispose the adjustment component (34) of the position that is used to adjust said bar portion.

7. according to claim 1 or claim 2 reciprocating compressor is characterized in that:

Said four cylinders have:

Along the axial cylindrical main body of said cylinder portion (4a) and

Be fixed on the tabular plat part (4p) of an end of said main part through bolt,

Between said main part and said plat part, clip elastic member (4A).

8. according to claim 1 or claim 2 reciprocating compressor is characterized in that:

Between said piston crown and the pressing plate (27) that is fixed through bolt, clip rubber-like Spacer (30).

9. according to claim 1 or claim 2 reciprocating compressor is characterized in that, comprising:

Be used for converging converging suction passage (9) and being used to converge the arbitrary at least side who discharges stream (8) of said a plurality of discharge streams of said a plurality of suction passages,

Said 4 suction passages (6) can make fluid at internal circulation,

Said 4 discharge streams (7) can make fluid at internal circulation,

The said suction passage and said of converging converges the arbitrary at least side who discharges in the stream and is configured to the arbitrary at least side in the axial axle zone (31) and its neighboring area (32) of said motor reel overlapping.

10. reciprocating compressor as claimed in claim 9 is characterized in that:

The said suction passage and said of converging converges and discharges arbitrary at least square in the stream to become with said axle zone be the ring-type stream at center.

11. reciprocating compressor as claimed in claim 10 is characterized in that:

Said converging discharged stream forming when being the ring-type stream at center with said axle zone, expands along the planar ground vertical with the axle direction of said motor reel.

12. reciprocating compressor as claimed in claim 10 is characterized in that:

The bearing support (10) that also has the shaft end that is configured in said motor reel,

Said converging discharged stream and the said arbitrary at least side who converges in the suction passage is formed on this bearing support.

13. reciprocating compressor as claimed in claim 9 is characterized in that:

Said motor has main part,

Said suction passage and the said discharge stream that converges of converging; On the axle direction of said motor reel, be configured in the both sides that clip said 4 cylinders; The said suction passage and said of converging converges the shaft end side that the arbitrary side who discharges in the stream is configured in said motor reel, and the opposing party is configured in said main part side.

14. reciprocating compressor as claimed in claim 9 is characterized in that:

Said housing comprises first parts (3f) and second parts (3s),

Said a plurality of discharge stream is formed the inside through said first parts,

Said a plurality of suction passage is formed the inside through said second parts,

Said first parts and said second parts are independent respectively to be formed, and the pyroconductivity of said second parts of the thermal conductivity ratio of said first parts is high.

15. reciprocating compressor as claimed in claim 9 is characterized in that:

It is mutually opposed that a pair of said first parallel portion is configured to clip said motor reel, and it is mutually opposed that a pair of said second parallel portion is configured to clip said motor reel.

16. reciprocating compressor as claimed in claim 9 is characterized in that:

Said 4 discharge streams have the tributary circuit (7s) along gravitational direction respectively, and dispose adhesive (7A).

17. reciprocating compressor according to claim 1 or claim 2 is characterized in that:

Have the sealed member (228) that is installed in said piston crown (205h),

At said 4 pistons (205) when being positioned at lower dead centre, be non-right angle with respect to the datum plane (R) at the center (C) of the center that comprises said motor reel (O) and said eccentric shaft along the sealing plane (S) of said sealed member.

18. reciprocating compressor as claimed in claim 17 is characterized in that:

When said 4 pistons are positioned at lower dead centre, be non-right angle with respect to said datum plane as the end face (S) of the piston crown of said 4 pistons of the said sealing plane of said sealed member.

19. reciprocating compressor as claimed in claim 17 is characterized in that:

When said 4 pistons are positioned at lower dead centre, about said datum plane, with the opposite side of movement direction at the center of said eccentric shaft, said sealing plane is acute angle with respect to said datum plane.

20. reciprocating compressor as claimed in claim 18 is characterized in that:

The part of said sealed member is held and is fixed between the end face and pressing plate (227) of piston crown of said 4 pistons.

21. reciprocating compressor as claimed in claim 18 is characterized in that:

When said 4 pistons are positioned at upper dead center, the end face almost parallel of the pressing chamber (204j) of the end face of the piston crown of said 4 pistons and said 4 cylinders.

22. reciprocating compressor as claimed in claim 17 is characterized in that:

Said sealing plane is medium and small in suction stroke with respect to absolute value ratio in compression stroke at the tilt angle on the plane vertical with said datum plane.

23. reciprocating compressor as claimed in claim 17 is characterized in that:

Become in the PV of sealed member value maximum said motor reel angle of rotation near, said sealing plane (S) is rectangular with respect to said datum plane (R), wherein the PV value is the product of contact pressure P and Sliding velocity V.

24. reciprocating compressor according to claim 1 or claim 2 is characterized in that:

Have the housing (3) of taking in said motor reel,

Comprise: the discharge gas flow path (Z) that is configured in the arbitrary at least side's in said housing and said 4 cylinders inside;

The cooling of inside that cooling is sucked said discharge gas flow path with medium is with suction port (10j); With

From said discharge gas flow path discharge said cooling with the cooling of medium with exhaust port (3j).

25. an oxygen concentrating device is characterized in that, comprising:

The described reciprocating compressor of claim 24 (1,101);

Be supplied to by said reciprocating compressor institute's air compressed and take in from this air the contactor of the sorbent of adsorption of nitrogen (304A, 304B) selectively;

Take out the oxygen concentrated gas taking-up portion (305A, 305B) of oxygen concentrated gas in the said contactor;

The oxygen jar (307) that the said oxygen concentrated gas that from said contactor, takes out through said oxygen concentrated gas taking-up portion is stored; With

The gas discharge section (303c, 303d) that the gas that will comprise through making in the said contactor decompression nitrogen that breaks away from from said sorbent is discharged in the said contactor,

Said cooling is the gas that comprises nitrogen of discharging from said contactor through said gas discharge section with medium.

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