CN101605993A - Reciprocating compressor and oxygen concentrating device - Google Patents

Abstract

The invention provides reciprocating compressor and oxygen concentrating device.It can realize high efficiency, long lifetime, miniaturization and and low noise, low vibration.Reciprocating compressor (1) comprising: the motor with motor reel (2s); Along with 4 cylinders (4) of the direction configuration of the axle direction quadrature of motor reel (2s); And 4 pistons (5) that are formed with piston crown (5h) and bar portion (5R) respectively, wherein, described piston crown (5h) can be entrenched in to to-and-fro motion on each of 4 cylinders (4), and described bar portion (5R) can be entrenched on the eccentric shaft (17) that is fixed on the motor reel (2s) rotatably.

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 uses in existing oxygen concentrator etc. 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 differences 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 away 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, by the number of cylinder is increased to 4 from 2, can in 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 by 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 by above-mentioned motor reel and be configured in 2 cylinders on the straight line with above-mentioned straight line quadrature and the center by above-mentioned motor reel.

In this reciprocating compressor, when overlooking, on the straight line at the center by motor reel and with the straight line at this straight line quadrature and the center by 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 by 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 the compression stroke from certain piston can being transferred to suction stroke transmits effectively for the power that helps other piston motion, 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, be formed with second positioning part that disposes in the mode corresponding respectively with above-mentioned first positioning part at above-mentioned four cylinders, 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 by bolt, clip elastic member between aforementioned body portion and above-mentioned plat part.

In this reciprocating compressor, 4 cylinders each main part and plat part between clip elastic member, thereby only by 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 by bolt, clips the rubber-like Spacer.

In this reciprocating compressor, by 4 pistons each piston crown and pressing plate between clip Spacer, thereby only by 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 either party at least who discharges stream that converges 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 either party at least who discharges in the stream and be configured to axial axle zone and the either party at least in its neighboring area overlapping along above-mentioned motor reel.

In this reciprocating compressor, converge suction passage and converge the either party at least who discharges in the stream by setting, can converge the stream between a plurality of cylinders.In addition, converge suction passage and converge the either party at least who discharges in the stream be configured to axial axle zone and the either party at least in its neighboring area along motor reel overlapping, thereby can suppress the maximization of the compressor integral body that causes 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, herein " overlapping " mean, converges to flow into stream or converge and discharge stream and be configured to include in the zone that is made 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, above-mentionedly converges suction passage and above-mentionedly converges the either party at least who discharges in the stream to form with above-mentioned axle zone be the ring-type stream at center.

In this reciprocating compressor, to converge stream be the ring-type stream by making, and can concentrate stream compactly, can easily suppress to maximize.In addition, converge by 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 either party at least who converges in the suction passage is formed on this bearing support.

In this reciprocating compressor,, can suppress effectively to maximize and converge stream between a plurality of cylinders by parts and the space around it of effectively utilizing bearing supporting usefulness.

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, the discharge stream has the axial part along motor reel, thereby can dispose the discharge stream efficiently.

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, thereby 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 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, above-mentioned suction passage and the above-mentioned discharge stream that converges of converging, on the axle direction of above-mentioned motor reel, be configured in the both sides that clip above-mentioned 4 cylinders, above-mentionedly converge suction passage and above-mentionedly converge the shaft end side that the either party who discharges in the stream is configured in above-mentioned motor reel, 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 and converge discharge stream the two.In addition, converge suction passage and converge the discharge stream, can prevent from further to improve compression efficiency in the transmission of heat between the two by 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, above-mentioned a plurality of discharge stream is formed the inside by above-mentioned first parts, above-mentioned a plurality of suction passage is formed the inside by above-mentioned second parts, above-mentioned first parts and above-mentioned second parts are independent respectively to be formed, and the pyroconductivity height of above-mentioned second parts of the thermal conductivity ratio of above-mentioned first parts.

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, 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, 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, with discharge first parallel portion of stream and suction passage second parallel portion the two be formed on the inside of housing, thereby can effectively not use housing lavishly, can further suppress effectively to maximize and converge 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, upper dead center at 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 inside of the either party at least in above-mentioned housing and above-mentioned 4 cylinders; Cooling is sucked the cooling suction port of the inside of above-mentioned discharge gas flow path with medium; With discharge the cooling exhaust port of above-mentioned cooling with medium from above-mentioned discharge gas flow path.

In this reciprocating compressor, to cool off with medium by 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, and the temperature that can suppress pressing chamber rises, and 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 the air that compresses by above-mentioned reciprocating compressor 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 takes out from above-mentioned contactor by above-mentioned oxygen concentrated gas taking-up portion is stored; With the gas discharge section that the gas that will comprise by 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 medium is by the gas that comprises nitrogen of above-mentioned gas discharge portion from above-mentioned contactor discharge.

In this oxygen concentrating device, will be by the gas that comprises nitrogen of above-mentioned gas discharge portion from the contactor discharge, guide to after the seal container inside of reciprocating compressor by discharging gas flow path, discharge to the outside, thereby can guarantee the airtight construction of reciprocating compressor, and the sealed member in the seal container of cooling reciprocating compressor, bearing etc., thus, can improve the sealed member of reciprocating compressor, the durability of bearing, miniaturization by cooling fan, low rotationization can reach energy-conservationization and quietization, can further improve compression efficiency, 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 by 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 described above, can access following effect according to the present invention.

In the first～eight invention, by the number of cylinder is increased to 4 from 2, can in 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 by making stroke.And, be 4 by 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, thereby the power that is applied to motor reel is cancelled 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 either party at least who discharges in the stream by setting, can converge the stream between a plurality of cylinders.In addition, converge suction passage and converge the either party at least 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 can suppress the maximization of the compressor integral body that causes 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, to cool off with medium by 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, miniaturization by cooling fan, low rotationization can reach energy-conservationization and quietization, can prevent the decline of the oxygen concentration of block concentrated gas.

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 together represents to be installed in the parts on the cylinder of Fig. 1 and the perspective illustration 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 used for the axle zone of reciprocating compressor of explanatory drawing 1 and the explanation synoptic diagram of its neighboring area.

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) illustrates the longitudinal section of cooling with exhaust port.

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

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

3j cooling exhaust port

3d motor through hole

3f first parts

The 3r slot part

3s second parts

The 3t annulus

3u sucks and uses protuberance

The 3v cylindrical portion

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

10j cooling suction port

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 together represents to be installed in the parts on the cylinder of Fig. 1 and the perspective illustration 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 used for the axle zone of reciprocating compressor of explanatory drawing 1 and the explanation synoptic diagram of its neighboring area.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) illustrates the longitudinal section of cooling with exhaust port.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 present embodiment at first, is described.In the present embodiment, 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, by discharging stream 7, converging and discharge stream 8, finally discharges from reciprocating compressor 1 after this is compressed by 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) by a motor 2.Motor reel 2s is the output shaft of motor 2, and as shown in Figure 3,2h supports by pedestal.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 (aftermentioned) 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., by 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 height of the thermal conductivity ratio second parts 3s of the first parts 3f.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 than the first parts 3f height.The first parts 3f and the second parts 3s below are described.

(first parts)

The first parts 3f works as common housing.As mentioned above, 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) in the mode of extending along the motor reel direction.More particularly, the first parts 3f is following shape: in the quadrangular barrel that the motor reel direction when being installed on the motor 2 on the edge is extended, on each of 4 wall portions, be formed with along axial 4 the slot part 3r of motor, as a 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 respectively 4 in the piston 5 linking department 5c (with reference to Figure 21) and protuberance 10z, the 10w (aftermentioned) (with reference to Figure 15,16) of bearing support 10.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, be formed with altogether 4 discharges inlet 3xs corresponding respectively with 4 cylinders 4 on the first parts 3f, 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, be formed with two first parallel portion 7f in the first parts 3f, 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 inlet 3x.That is, one first parallel portion 7f is the shared stream of the air of discharging from two cylinders 4.Specifically, describe with Fig. 6, in the connection and the inside of two cylinders 4 on a left side be the first upper left parallel portion 7f, connect right and 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 the present embodiment.In addition, in Figure 11～13, use among the inlet 3x, in order to make the corresponding relation between each figure clear and definite, for the special symbol that marks 3x (a), 3x (b) of inlet of two discharges wherein in the discharge that amounts to 4.

The air that in each cylinder 4, is compressed and discharges, by 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 present embodiment, by 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, be configured in two positions at diagonal angle with inlet 3x with 4 discharges of 4 corresponding respectively settings 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 is used for discharging the cooling medium from discharge gas flow path Z described later (with reference to Figure 32) with exhaust port 3j.

(second parts)

The second parts 3s is formed from a resin as mentioned above, two cylindrical portion 3v that have annulus 3t, annulus 3t installed and sucking with protuberance 3u (with reference to Fig. 9,10).Two cylindrical portion 3v form along the axle direction of the motor reel 2s under the state that is installed on the motor 2 with protuberance 3u with suction and extend (with reference to Figure 10 (a)).Be formed with the part (detailed content is narrated in the back) of a plurality of suction passages 6 in the inside of two cylindrical portion 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, the air that enters from suction port 3z is sent to and converges 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 altogether 4 suctions outlet 3ys corresponding respectively at the second parts 3s with 4 cylinders 4.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, be formed with two second parallel portion 6f in the second parts 3s, 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 exporting 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 and the inside of two right cylinders 4 be the second upper right parallel portion 6f, connect a left side and under two cylinders 4 inside be the second parallel portion 6f of lower-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, practising physiognomy is arranged in the bight (bight of the upper right and lower-left of Fig. 6) different with two the first residing bights of parallel portion 7f (bight of the upper left and bottom right of Fig. 6) over the ground.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 cylindrical portion 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 respectively staggering when overlooking at the Zhou Fangxiang of motor reel 2s.In addition, the ultimate range of cylindrical portion 3v apart from the ultimate range at motor reel 2s center and skull 4h apart from motor reel 2s center about equally.And, because cylindrical portion 3v includes in the quadrilateral (with reference to the T of Fig. 6) that is made 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 and become space (with reference to Fig. 3～5) by the combined closing of the second parts 3s and companion flange described later 16.In addition, converging suction passage can not be the ring-type stream, for example can form bulk.In addition, in the present embodiment, 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, and the center can be offset.

(cylinder)

In the present embodiment, 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 by 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 by 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 with 6 bolt of skull 4h (back narration) when being installed on the cylinder 4.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 as shown in figure 18 is installed on cylinder 4.Specifically, expulsion valve 4w, expulsion valve pressing plate 4z, Aspirating valves 4v install by 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 by 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 by 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) by 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.Herein, 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, under skull 4h is installed in state on the cylinder 4, obstruct section 4s and slot part 4m are sealed by cylinder seal spare 20e, inside at skull 4h, by 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 by the second parallel portion 6f is supplied to the first Room 4n (with reference to Fig. 6) by sucking with outlet 3y, through hole 4b.Through hole 4c is the hole that the air that is imported into by 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) by 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 in 4k inside, second Room, is sent to through hole 4g (with reference to Figure 18) by after the through hole 4f.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) by 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 present embodiment, 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 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 by 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 differences 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 by 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, is formed with exhaust port 10h, cooling with suction port 10j (with reference to Figure 14～16) in each of this protuberance 10w, 10z.The pressurized air that is converged in converging discharge stream 8 is finally discharged (with reference to Figure 16 (a)) from exhaust port 10h.Cooling is used for cooling is sucked with medium the inside of discharge gas flow path Z described later (with reference to Figure 32) with suction port 10j.Be formed with two discharge inflow entrance 10i in the angle part of bearing support 10, 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-dimensionally 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 and become the space of sealing by the combination of bearing support 10 and housing lid described later 15 (with reference to Fig. 3～5).In addition, converging the discharge stream can not be the ring-type stream.In addition, in the present embodiment, 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, and the center can be offset.In addition, in the present embodiment, be formed and discharge stream 8 converging of ring-type stream and form along the plane vertical 33 and expand two-dimensionally with the axle direction of motor reel 2s, but be not limited thereto, also can form along expanding two-dimensionally with respect to plane 33 plane inclined, in addition, can be not do not form yet, but for example form in the mode of on axle direction, extending in 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 by being provided with to converge, can prevent the increase of part number as bearing support that present embodiment is shown in 10.

In addition, in the present embodiment, only be formed with to converge at bearing support 10 and discharge stream 8, as long as but converge the either party at least who discharges stream and converge in the suction passage and be formed on bearing support, 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 and converge suction passage that the two is formed on bearing support.

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

Then, with reference to Figure 27 etc., illustrate to converge suction passage 9 and converge the position of discharging stream 8 to concern.At first, converge suction passage 9 and converge and discharge stream 8 and on the axle direction of motor reel, be disposed at the both sides (with reference to Fig. 3～5) that clip 4 cylinders 4.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 converge and discharge stream 8 and form ring-type, their round center is consistent with the round center of motor reel 2s.In addition, converging suction passage 9 and converging discharges stream 8 the two is configured to overlapping along the either party at least of the axial axle zone 31 of motor reel and its neighboring area 32.Herein, " overlapping " be meant, as 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 of axle zone 31 and peripheral region 32.Converge suction passage 9 and converge discharge stream 8 does not exceed the zone that is made of axle zone 31 and neighboring area 32 in the footpath direction width (with reference to the width W 1 of Figure 27).In the present embodiment, 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 present embodiment 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 the present embodiment, 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 either party 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 to 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 the present embodiment, converge suction passage 9 and converge and discharge stream 8 the two is configured in the inside of neighboring area 32, but converge suction passage and converge the either party at least who discharges in the stream be configured to along the axial axle zone 31 of motor reel and any overlapping the getting final product at least in its neighboring area, for example, also can adopt following structure, only converge and discharge stream and converge either party in the suction passage and include in the zone that constitutes by axle zone 31 and neighboring area 32 (on the direction of footpath, in the scope of width W 1), and, the opposing party does not include in the zone that is made of axle zone 31 and neighboring area 32 but stretches out, in addition, also can be configured to, not to discharge stream converging of ring-type or converge suction passage on the motor reel direction, not repeat 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 mentioned above, a plurality of suction passages 6 form in the mode of the inside by the second parts 3s, and a plurality of suction passages 6 form that portion can flow-through fluid within it.In addition, the inside (pressing chamber 4j) of each 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 enters the second parts 3s.Below, illustrate 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 by each second parallel portion 6f is sent to the first Room 4n (with reference to Fig. 6,10 etc.) from sucking with exporting 3y by through hole 4b.Then, the air of the first Room 4n is sent to pressing chamber 4j by through hole 4c.A suction passage 6 constitutes as mentioned above.

(discharge stream)

Then, a plurality of discharge streams 7 are described.As mentioned above, a plurality of discharge streams 7 form in the mode of the inside by the first parts 3f, and a plurality of discharge streams 7 form that portion can flow-through fluid (being air in the present embodiment) within it.In addition, the inside (pressing chamber 4j) of each 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).

Each discharge stream 7, i.e. stream from cylinder 4 inside (pressing chamber 4j) to exhaust port 10h below is described.At first, by through hole 4f, and, enter through hole 4g (with reference to Figure 18) at the compressed air of pressing chamber 4j of the inside of cylinder 4 by the second Room 4k.Then, be sent to the discharge inlet 3x of the first parts 3f by 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 enters the discharge inflow entrance 10i (with reference to Fig. 4) of bearing support 10 by the first parallel portion 7f.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 the present embodiment, reciprocating compressor 1 has 4 and discharges stream 7 and 4 suction passages 6., as mentioned above, discharge in the streams 7 at 4, the first parallel portion 7f is 2 and discharges the shared stream of streams 7 herein, 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 and a plurality of suction passage 6 have shared stream respectively in a part, but the number of discharge stream 7 and suction passage 6 is handled as 4 respectively.

In addition, discharge stream 7 and have tributary circuit 7s (with reference to Fig. 4) for 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 the present embodiment, 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 away 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 herein.In addition, companion flange 16 is for assembling motor 2 and housing 3 and be provided with as fixed bearing portion when the housing of oxygen concentrator is installed reciprocating compressor 1.Therefore, in the present embodiment, 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.Herein, 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, adjust the position of 4 piston 5 5R of bar portion separately by utilizing adjustment part 34, can easily make the axle center of cylinder 4 consistent with the axle center of the piston crown 5h of piston 5.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 in the mode that covers each piston 5.In addition, cylinder 4 herein is the illustrated states 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.

Herein, as shown in figure 25, form the first positioning part 3B at housing 3, under the situation that forms the second positioning part 4B that disposes in the mode corresponding on 4 cylinders 4 respectively with the first positioning part 3B, 4 cylinders 4 are positioned by 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.Herein, use between the inflow entrance 10i at the first parallel portion 7f of the first parts 3f and the discharge of bearing support 10, 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 mentioned above.

(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, if being shortened, the length L of piston rod 5P becomes length L ', as mentioned above, 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 mentioned above, 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 the sliding distance of piston 5 can 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 reciprocating compressor 1 with a plurality of cylinders, 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, as 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 in the mode of describing the curve of cyclical fluctuations respectively, in angle of swing is about 100 moment of spending to become maximum, is about 200 moment of spending to become minimum in angle of swing.On the other hand, in the number of cylinder is 4 present embodiment, when keeping the phase difference of 90 degree respectively, 4 pistons 5 carry out air-breathing compression stroke, thereby the power that is applied on the piston crown 5h when the compression stroke of piston 5 is cancelled 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 present embodiment 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 present embodiment, shown in figure 32, seal container 330 have 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 housing lid 15 on the bearing support 10.

As shown in figure 31, in oxygen concentrating device 100, dispose and discharge gas flow path Z, it is used for will be by gas discharge section 303c, the 303d gas that comprises nitrogen (cooling medium) from contactor 304A, 304B discharge, guide to seal container 330 inside of reciprocating compressor 1, discharge 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 by 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 by 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 by 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 by 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 by 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 by 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.By 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 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 by membrane filter 311 inhaled airs.By reciprocating compressor 1 compressed air, pressurized in the first absorbing cylinder 304A by 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 by one-way valve 305A.Like this, be stored in oxygen concentrated gas in the oxygen jar 307 after reducing pressure, adjust flows, be ejected from ejiction opening joiner 310 by flow regulator 309 by reduction valve 308.

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

Herein, 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 by blow down valve 306, under the state that 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, the 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 by discharge tube 362 with exhaust port 324 with exhaust port 3j.In addition, in the present embodiment, be formed with cooling with the sidepiece of the bearing support 10 of suction port 10j and the sidepiece of the housing 3 that is formed with cooling usefulness 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, the 304B of oxygen concentrating device shown in Figure 31 100, discharge to the outside afterwards seal container 330 inside that the 3rd port 303c and the 4th port 303d by 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, the gas that comprises nitrogen of discharging from first, second absorbing cylinder 304A, the 304B of oxygen concentrating device 100, after in the seal container 330 of managing 361 inflow reciprocating compressors 1, discharge gas flow path Z by forming, each part such as bearing 17b, bearing 22a, 22b, piston 5 of cooling eccentric shaft 17, and discharge to the outside.In the present embodiment, shown in figure 32, discharge gas flow path Z in the seal container 330 of reciprocating compressor 1 from above to below form.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.

[feature of the present invention]

The reciprocating compressor 1 of present embodiment has following feature.

In the reciprocating compressor 1 of present embodiment, by the number of cylinder 4 is increased to 4 from 2, can in 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 by making stroke.And, be 4 by 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 by motor reel 2s and with the straight line at this straight line quadrature and the center by 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 by 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 the compression stroke from certain piston 5 can being transferred to suction stroke transmits effectively for the power that helps other piston 5 motions, 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 the center of piston crown 5h of axle center and piston 5 of 4 cylinders 4 is consistent, 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, 4 cylinders 4 each main part 4a and plat part 4p between 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 by 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, by 4 pistons 5 each piston crown 5h and pressing plate 27 between clip Spacer 30, thereby only by 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 either party at least who discharges in the stream 8 by setting, can converge the stream between a plurality of cylinders.In addition, converge suction passage 9 and converge the either party at least 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 can suppress the maximization of the compressor integral body that causes 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 the present embodiment, 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, above-mentionedly converge suction passage 9 and above-mentionedly converge that to discharge that stream 8 forms with axle zone 31 be the ring-type stream at center.To converge stream be the ring-type stream by 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 by 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, by the parts and the space around it of using bearing supporting usefulness effectively, can suppress effectively to maximize and converge stream between a plurality of cylinders.

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

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 by 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 be 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 converges discharge stream 8, is configured in the both sides that clip 4 cylinders 4 on 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.Therefore, can be in the maximization that suppresses compressor, configuration efficiently converge suction passage 9 and converge discharge stream 8 the two.In addition, converge suction passage 9 and converge discharge stream 8, can prevent that heat from transmitting, can further improve compression efficiency between the two by isolation.

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 in the mode of the inside by the first parts 3f, a plurality of suction passages 6 form in the mode of the inside by the second parts 3s, the first parts 3f and the second parts 3s are independent respectively to be formed, and the pyroconductivity height of the thermal conductivity ratio second parts 3s of the first parts 3f.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 the present embodiment, the first parts 3f is metal, and therefore the pyroconductivity height 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 turn along the motor reel direction with respect to a motor reel 2s and to install.Therefore, from the nearest cylinder 4 of the main part 2b of motor 2 (corresponding with the piston 5 of main part side), 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 ratio is big from 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 coating adhesive 7A on stream at this, thereby the abrasion powder that can prevent sealed member is discharged.

In addition, according to the oxygen concentrating device 100 of present embodiment, can improve durability by cooling off in the reciprocating compressor 1 to closed type, miniaturization, the low rotationization of the fan 323 by cooling usefulness can reach energy-conservationization and quietization.In addition, descend by the inside temperature that makes reciprocating compressor 1, 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 by 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 present embodiment,, 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 from the embodiment described above, and the housing 103 that is equivalent to first parts of above-mentioned mode of execution has 4 suctions with exporting 103y (with reference to Figure 37).And, converge the space (with reference to Figure 34～34) of on the motor reel direction, more leaning on main part 2b side that suction passage 109 is formed on housing 103 inside 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 from the embodiment described above.A plurality of suction passages 106 form in the mode of the inside by 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 enters 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, by the air of each second parallel portion 106f, be sent to first Room by 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 by through hole 4c.A suction passage 106 constitutes in the above described manner.

As mentioned above, in the reciprocating compressor 101 of present embodiment, 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, 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 by 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 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 the relation at the angle of swing of reciprocating compressor of expression Figure 38 and PV value and head tilt angle.Figure 41 is the longitudinal section of the existing reciprocating compressor of explanation.

As shown in figure 38, the reciprocating compressor of present embodiment 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.

As 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, with piston crown 205h with in cylinder 204, can freely swing and reciprocating mode be configured.End face S at the piston crown 205h of piston 205 is the part of the sealed member 228 of mounting ring-type on the sealing plane S, 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 by screw 230.

As 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, as 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, from state shown in Figure 38, by 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, tilt 1.5 ° with respect to the plane vertical (plane vertical) with the central shaft of cylinder 204 with datum plane R along the sealing plane S of the sealed member 228 of ring-type.And, along with the rotation of motor reel 2s, as 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.

According to the curve M of Figure 40 as 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 conventional 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, can reduce the gap of 228 of cylinder 204 and sealed members, prevent air leakage, improve compression efficiency.

In addition, in suction stroke, the PV value is whole than medium and small in compression stroke, duty ratio to sealed member 228 is less, therefore 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 substantially 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, and ratio is medium and small in suction stroke in compression stroke, therefore, sealed member 228 roughly contacts uniformly with the internal surface of cylinder when the high load of sealed member 228, can prevent the part abrasion of sealed member 228, realizes 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, 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 the pressing chamber 204j of the upper surface of pressing plate 227 and cylinder 204, improves compression efficiency.

More than, with reference to description of drawings embodiments 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 by the explanation of above-mentioned mode of execution, but is represented by the scope of claim, and is included in and the meaning of the scope equalization of claim and the whole changes in the scope.

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

In addition, in the above-described embodiment, the discharge stream has axial first parallel portion along motor reel, and 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 either party in first parallel portion and second parallel portion discharging 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 by between the pressing plate 27 of bolt.

In addition, in the above-described embodiment, be formed with the sidepiece and the sidepiece that be formed with the housing 3 that cool off usefulness exhaust port 3j of cooling with the bearing support 10 of suction port 10j, be configured on the Zhou Fangxiang of motor reel 2s adjacent, but can be configured to have any position relation 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 the inside of cooling with medium suction discharge gas flow path Z then can 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 the above-described 3rd embodiment, 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 the above-described 3rd embodiment, 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 the above-described 4th embodiment, illustrated 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 the above-described 4th embodiment, illustrated for resuscitation apparatus illness patient being 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

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

Claims (28)

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

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

Along with 4 cylinders (4) of the direction configuration of the axle direction quadrature of described motor reel; With

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

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

Described 4 cylinders are: when overlooking, be configured in 2 cylinders on the straight line at the center by described motor reel and be configured in 2 cylinders on the straight line with described straight line quadrature and the center by described motor reel.

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

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

4. as each described reciprocating compressor in the claim 1～3, it is characterized in that:

Described eccentric shaft is 1.

5. as each described reciprocating compressor in the claim 1～4, it is characterized in that:

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

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

Be formed with second positioning part (4B) that disposes in the mode corresponding respectively at described four cylinders with described first positioning part,

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

6. as each described reciprocating compressor in the claim 1～5, it is characterized in that:

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

7. as each described reciprocating compressor in the claim 1～6, it is characterized in that:

Described four cylinders have:

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

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

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

8. as each described reciprocating compressor in the claim 1～7, it is characterized in that:

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

9. as each described reciprocating compressor in the claim 1～8, it is characterized in that, comprising:

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

Be connected with each inside of described 4 cylinders and make the fluid can be at a plurality of suction passages (6) of internal circulation;

Be connected with each inside of described 4 cylinders and make the fluid can be at a plurality of discharge streams (7) of internal circulation; And

Be used for converging converging suction passage (9) and being used to converge the either party at least who discharges stream (8) that converges of described a plurality of discharge streams of described a plurality of suction passages,

Describedly converge suction passage and describedly converge the either party at least who discharges in the stream and be configured to the either party at least in the axial axle zone (31) and its neighboring area (32) of described motor reel overlapping.

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

Describedly converge suction passage and describedly converge the either party at least who discharges in the stream to form with described axle zone be the ring-type stream at center.

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

The described discharge stream that converges that is formed described ring-type stream forms along the planar ground expansion vertical with the axle direction of described motor reel.

12., it is characterized in that as claim 10 or 11 described reciprocating compressors:

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

Described converging discharged stream and the described either party at least who converges in the suction passage is formed on this bearing support.

13., it is characterized in that as each described reciprocating compressor in the claim 9～12:

Described a plurality of discharge stream has axial first parallel portion (7f) along described motor reel respectively.

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

Described first parallel portion is formed on the inside of described housing.

15., it is characterized in that as each described reciprocating compressor in the claim 9～11:

Described motor has main part,

Described suction passage and the described discharge stream that converges of converging, on the axle direction of described motor reel, be configured in the both sides that clip described 4 cylinders, describedly converge suction passage and describedly converge the shaft end side that the either party who discharges in the stream is configured in described motor reel, the opposing party is configured in described main part side.

16., it is characterized in that as each described reciprocating compressor in the claim 9～15:

Described a plurality of suction passage has axial second parallel portion (6f) along described motor reel respectively.

17., it is characterized in that as each described reciprocating compressor in the claim 9～16:

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

Described a plurality of discharge stream is formed the inside by described first parts,

Described a plurality of suction passage is formed the inside by described second parts,

Described first parts and described second parts are independent respectively to be formed, and the pyroconductivity height of described second parts of the thermal conductivity ratio of described first parts.

18., it is characterized in that as each described reciprocating compressor in the claim 9～16:

Described a plurality of discharge stream has axial first parallel portion along described motor reel respectively, described a plurality of suction passage has axial second parallel portion along described motor reel respectively, a pair of described first parallel portion and a pair of described second parallel portion are formed on the inside of described housing

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

19., it is characterized in that as each described reciprocating compressor in the claim 9～18:

Described a plurality of discharge stream has the tributary circuit (7s) along gravitational direction respectively, and disposes adhesive (7A).

20., it is characterized in that as each described reciprocating compressor in the claim 1～19:

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

At described 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 described motor reel (O) and described eccentric shaft along the sealing plane (S) of described sealed member.

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

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

22., it is characterized in that as claim 20 or 21 described reciprocating compressors:

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

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

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

24., it is characterized in that as claim 21 or 23 described reciprocating compressors:

When described 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 described 4 pistons and described 4 cylinders.

25., it is characterized in that as each described reciprocating compressor in the claim 20～24:

Described 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 described datum plane.

26., it is characterized in that as each described reciprocating compressor in the claim 20～25:

Become in the PV of sealed member value maximum described motor reel angle of rotation near, described sealing plane (S) is rectangular with respect to described datum plane (R).

27., it is characterized in that as each described reciprocating compressor in the claim 1～26:

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

Comprise: the discharge gas flow path (Z) that is configured in the inside of the either party at least in described housing and described 4 cylinders;

Cooling is sucked the cooling suction port (10j) of the inside of described discharge gas flow path with medium; With

Discharge the cooling exhaust port (3j) of described cooling from described discharge gas flow path with medium.

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

The described reciprocating compressor of claim 27 (1,101);

Be supplied to the air that compresses by described reciprocating compressor 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 described contactor;

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

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

Described cooling medium is the gas that comprises nitrogen of discharging from described contactor by described gas discharge section.

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