CN1611782A - Rotary compressor - Google Patents

Abstract

The invention discloses a kind of rotary compressor which includes the fluid cavity, the compression roller and the spacing block. The fluid cavity lies under the compressor and includes the sucking hole and discharge holes a and b. The sucking hole lies on the upside of the fluid cavity; every discharge holes and discharge compression fluid when the pressure is more than a value. The central of the compression roller deviate from the central of the fluid cavity; The compression roller roll on the inner surface of the fluid cavity; select one from two directions; do revolution around it and compress part space of the fluid cavity . The spacing block lies in the middle of the discharge valve c and d; keeps touching stage with the compression roller and divides the fluid cavity into two independent spaces.

Description

Rotary compressor

Technical field

The present invention relates to the rotary compressor field, relating in particular to can be by positive and negative direction rotation rotary compressor.

Background technique

The compressor of prior art is the power that utilizes motor or steam turbine, to the pressurization of working fluids such as air, refrigerant, improves a kind of machine of working fluid pressure.The compressor of prior art is widely used in field of household appliances and production fields such as air-conditioning, refrigerator.

By the compression type, compressor can be divided into displacement compressor and turbocompressor.

What wherein, be widely used in production field is displacement compressor.The compress mode of displacement compressor is the mode by minimizing volume boost pressure.Displacement compressor can be divided into reciprocating type compressor and rotary compressor.

The reciprocating type compressor utilizes the back and forth movement compressed fluid of cylinder interior piston.The advantage of reciprocating type compressor is to produce higher compression efficiency with less mechanical realization.But there is the limited problem of rotational speed in the reciprocating type compressor because of the back and forth movement of piston.Simultaneously, also because the inertia of piston produces bigger vibration.

Rotary compressor utilizes the revolution of the eccentric compressing roller of cylinder interior, compression working fluid.Rotary compressor is compared with the reciprocating type compressor, can obtain higher compression efficiency with lower speed.And rotary compressor also possesses the advantage that vibration is low, noise is little.

Though the prior art rotary compressor possesses advantage, because of himself structural restriction, compressing roller can only be by single direction revolution.The prior art rotary compressor only possesses a suction port and exhaust port is communicated with cylinder respectively, and its compressing roller rolls to exhaust port from suction port along the inner peripheral surface of cylinder, and working fluid is compressed.Therefore, compressing roller is by in the other direction, from exhaust port when suction port rolls, can not compressed fluid.

In addition, the prior art rotary compressor does not possess the function that changes compression volume.Recently, for multiple operating conditionss such as corresponding air-conditionings, developing the compressor that can change compression volume.The prior art rotary compressor only possesses a compression volume, so its level of application is severely limited.

Summary of the invention

Technical problem to be solved by this invention is, the rotary compressor that a kind of rotary compressor can both compressed fluid when the rotation of positive and negative direction is provided, another object of the present invention is for providing a kind of rotary compressor, can change compression volume, another purpose of the present invention is for providing a kind of rotary compressor, prevent the lubricant oil in fluid flows to cylinder, be accumulated in the fluid intake system.

For the technical solution problem, the technical solution used in the present invention is:

As a kind of rotary compressor of the present invention, comprise fluid chamber 29, compressing roller 22, spacer 23, fluid chamber 29 is positioned at the below of compressor and comprises inlet hole 26 and tap hole 27a, 27b, inlet hole 26 is at the upside of fluid chamber 29, each tap hole 27a, 27b discharges compressed fluid when pressure arrival certain pressure is above, the center of compressing roller 22 is from the misalignment of fluid chamber 29, compressing roller 22 rolls along the inwall of fluid chamber 29, and a certain direction in the selection both direction revolves round the sun, the segment space of compressive flow body cavity 29, spacer 23 is positioned at each expulsion valve 27c, between the 27d, continue the state of keeping in touch with compressing roller 22, fluid chamber 29 is divided into two independently spaces.

The invention has the beneficial effects as follows:

Rotary compressor of the present invention, even live axle is pressed any direction rotation, also can compressed fluid, and, regulate compression volume by changing the sense of rotation of live axle.And then rotary compressor of the present invention possesses the suction of suitable arrangement, tap hole, and possess the valve assembly simple in structure of opening each inlet hole by sense of rotation, and can utilize whole fluid chamber compressed fluid.This rotary compressor of the present invention has following invention effect.

The first, the rotary compressor of prior art will make up plurality of devices in order to obtain the dual compression capacity, such as combination compression volume mutually different two compressors and transformer.Can cause structure too complicated like this, cost rises.But, among the present invention, can obtain the dual compression capacity by a compressor.Particularly, the present invention can change the parts of prior art compressor by inferior limit ground, realizes the dual compression capacity.

The second, the rotary compressor of prior art possesses the compressor of single compressed capacity under various operating conditions such as air-conditioning or refrigerator, and suitable compression volume can not be provided, and causes wasting electric energy.But among the present invention, compressor can provide suitable compression volume correspondingly by different operating conditionss.

The 3rd, when producing the dual compression capacity, adopts by rotary compressor of the present invention the basic design of the rotary compressor fluid chamber of prior art.The prior art compressor that compressor among the present invention is identical with the fluid chamber size is compared, and its maximum capacity is identical with the prior art compressor.Rotary compressor of the present invention need not change the basic elements of character such as size of cylinder, also can substitute the prior art rotary compressor.Thereby compressor of the present invention need not be considered factors such as compression volume, also needn't increase cost, also can be applicable in the required various systems.

The 4th, rotary compressor of the present invention is provided for sucking the inlet hole of fluid on cylinder top, and the inflatable chamber that is used for temporary fluid.Usually, flow into refrigerant and lubricant oil in the fluid chamber simultaneously.If inlet hole and inflatable chamber are located at the cylinder below, then lubricant oil is difficult to flow into cylinder interior.This causes lubricant oil to accumulate in intake system, particularly accumulates in the inflatable chamber, may cause the lubrication problem of cylinder.But in the rotary compressor of the present invention, inlet hole and inflatable chamber all are positioned at the top of cylinder, can solve lubricant oil fully and accumulate in problem in the inflatable chamber, can be all the time to cylinder supplying lubricating oil suitably.

Description of drawings

Fig. 1 is rotary compressor first embodiment's part longitudinal section of the present invention.

Fig. 2 is press part first embodiment's decomposing schematic representation of the compressor of Fig. 1.

Fig. 3 is press part first embodiment's longitudinal section of the compressor of Fig. 1.

Fig. 4 a for the compressing roller of rotary compressor of the present invention when counterclockwise revolving round the sun, the first state sectional view of cylinder interior.

Fig. 4 b for the compressing roller of rotary compressor of the present invention when counterclockwise revolving round the sun, the second state sectional view of cylinder interior.

Fig. 4 c for the compressing roller of rotary compressor of the present invention when counterclockwise revolving round the sun, the third state sectional view of cylinder interior.

Fig. 4 d for the compressing roller of rotary compressor of the present invention when counterclockwise revolving round the sun, the four condition sectional view of cylinder interior.

When Fig. 5 a revolves round the sun in the direction of the clock for the compressing roller of rotary compressor of the present invention, the cylinder interior first state sectional view.

When Fig. 5 b revolves round the sun in the direction of the clock for the compressing roller of rotary compressor of the present invention, the cylinder interior second state sectional view.

When Fig. 5 c revolves round the sun in the direction of the clock for the compressing roller of rotary compressor of the present invention, cylinder interior third state sectional view.

When Fig. 5 d revolves round the sun in the direction of the clock for the compressing roller of rotary compressor of the present invention, cylinder interior four condition sectional view.

Fig. 6 is the press part variation longitudinal section among Fig. 3.

Fig. 7 is another embodiment's decomposing schematic representation of rotary compressor press part of the present invention.

Fig. 8 is the compressor compresses portion sectional view among Fig. 7.

Fig. 9 is the compressor cylinder interior sectional view among Fig. 7.

Figure 10 a is swiveling limitation mechanism first embodiment's initial state schematic representation of the compressor among Fig. 7.

Figure 10 b is swiveling limitation mechanism first embodiment's done state schematic representation of the compressor among Fig. 7.

Figure 11 a for the compressing roller of the compressor among Fig. 7 when counterclockwise rotating, the sectional view of cylinder interior first state.

Figure 11 b for the compressing roller of the compressor among Fig. 7 when counterclockwise rotating, the sectional view of cylinder interior second state.

Figure 11 c for the compressing roller of the compressor among Fig. 7 when counterclockwise rotating, the sectional view of the cylinder interior third state.

When Figure 12 a rotates in the direction of the clock for the compressing roller of the compressor among Fig. 7, the sectional view of cylinder interior first state.

When Figure 12 b rotates in the direction of the clock for the compressing roller of the compressor among Fig. 7, the sectional view of cylinder interior second state.

When Figure 12 c rotates in the direction of the clock for the compressing roller of the compressor among Fig. 7, the sectional view of the cylinder interior third state.

Accompanying drawing critical piece remarks

10: power part 13: live axle

13a: eccentric part 20: press part

21: cylinder 22: compressing roller

23: spacer 24: upper bearing

25: lower bearing 26: inlet hole

41a: the first inlet hole 41b: the 3rd inlet hole

41c: the second inlet hole 27a: first tap hole

27b: second tap hole 29: fluid chamber

30: baffler 40: inflatable chamber

50: drain passageway 60: valve assembly

65: the second valves of 61: the first valves

Embodiment

Below in conjunction with the drawings and specific embodiments rotary compressor of the present invention is described in further detail:

Fig. 1 is rotary compressor first embodiment's part longitudinal section of the present invention.Fig. 2 is in the compressor of Fig. 1, press part first embodiment's decomposing schematic representation.Fig. 3 is the press part one embodiment's longitudinal section in the compressor of Fig. 1.With reference to accompanying drawing,, be elaborated to rotary compressor first embodiment of the present invention.

As shown in Figure 1, rotary compressor of the present invention comprises shell 1 and power part 10 and press part 20 compositions, and power part 10 and press part 20 are positioned at shell 1.Though Fig. 1 medium power portion 10 is positioned at the top of compressor, press part 20 is positioned at the bottom of compressor, and their position can exchange on demand.The upper and lower of shell 1 is provided with upper lid 3 and lower cover 5 respectively, forms the inner space of sealing.Be used to suck the suction pipe 7 of working fluid, be located at a side of shell 1, be connected with the knockout drum 8 that is used to separate refrigerant and lubricant oil.In addition, the center of upper lid 3 is provided with discharge tube 9.Discharge tube 9 is discharged the fluid after the compression.In addition, for lubricated, cooling produces the parts of friction, deposits a certain amount of lubricant oil O in lower cover 5.

Power part 10 comprises stator 11, rotor 12, live axle 13.Stator 11 is fixed on the shell 1.Rotor 12 is supported on stator 11 inside, can rotate.Live axle 13 is inserted in the rotor 12.Rotor 12 is rotated under the effect of electromagnetic force.Live axle 13 passes the rotating force of rotor 12 to press part 20.Here, the end of live axle 13 is immersed among the lubricant oil O.For to stator 20 supply external power supplys, tenminal block 4 is set on upper lid 3.

Press part 20 is made up of cylinder 21, compressing roller 22, upper bearing 24 and lower bearing 25 substantially.Cylinder 21 is fixed on the shell 1.Compressing roller 22 is positioned at cylinder 21 inside.Upper bearing 24, lower bearing 25 are located at the top and the bottom of cylinder 21 respectively.

Below, with reference to Fig. 2, Fig. 3, Fig. 4, press part 20 is elaborated.

Cylinder 21 possesses a certain size internal volume, and possesses enough intensity, can resist the pressure that is compressed fluid.Eccentric part 13a is accommodated in cylinder 21 inner spaces.Eccentric part 13a is on live axle 13.Eccentric part 13a is a kind of eccentric cam, and there is certain distance in the rotating center of its center and live axle 13.In addition, on the inner peripheral surface of cylinder 13, be recessed to form groove 21b to inwall.Spacer 23 is set on groove 21b.In order to accommodate spacer 23 fully, groove 21b possesses enough length.

Compressing roller 22 is ring-shaped members, and internal diameter is littler than cylinder 21.As shown in Figure 4, compressing roller 22 tangent inner peripheral surfaces at cylinder 21 rotatably are combined on the eccentric part 13a.Therefore, compressing roller 22 is when live axle 13 rotations, and from the outer peripheral surface rotation of eccentric part 13a, the inner peripheral surface along cylinder 21 rolls simultaneously.In addition, when compressing roller 22 rolled, under the effect of eccentric part 13a, with rotating center, promptly revolved round the sun across a determining deviation in cylinder 21 centers.The outer peripheral surface of this compressing roller 22 is under the effect of eccentric part 13a, and is tangent with the inner peripheral surface of cylinder 21 always.Therefore, in the inner space of cylinder 21, the inner peripheral surface of the outer peripheral surface of compressing roller 22 and cylinder 21 forms fluid chamber 29.In rotary compressor, fluid chamber 29 is used for the suction and the compression of fluid.

As mentioned above, spacer 23 is located among the groove 21b of cylinder 21.In addition, elastic member 23a is set also in groove 21b, elastic support spacer 23 makes spacer 23 and compressing roller 22 keep in touch state always.The end of elastic member 23a is fixed on the cylinder 21, and the other end is fixed on spacer 23, and spacer 23 is pushed to compressing roller 22 1 sides.Thereby shown in Figure 4 as Fig. 3, spacer 23 is divided into two separate space 29a, 29b to fluid chamber 29.During live axle 13 rotation, the size of two space 29a, 29b changes, and the variation of complementary shape during their variation.When compressing roller 22 rotated in the direction of the clock, another space 29b became big gradually when some space 29a diminished gradually.But the volume sum of two space 29a, 29b is invariable, big or small basic identical with fluid chamber 29.This each space 29a, 29b, a certain the making progress in live axle 13 sense of rotation, but clockwise direction also can counterclockwise be played suction chamber and fluid chamber respectively.Thereby when compressing roller 22 was rotated, among each space 29a, 29b, the volume of fluid chamber diminished gradually, the fluid that sucks is before compressed, and the volume of suction chamber became greatly gradually, from new suction fluid.If the sense of rotation of compressing roller 22 changes, then the effect of each space 29a, 29b also can change.Compressing roller 22 is when counterclockwise rotating, and the rightward space 29b of compressing roller 22 plays fluid chamber, and compressing roller is when rotating in the direction of the clock, and leftward space 29b plays fluid chamber.

As shown in Figure 2, upper bearing 24 and lower bearing 25 are located at the top and the bottom of cylinder 21 respectively, by Upper shaft sleeve 24c, Lower shaft sleeve 25c and on axle sleeve inside through hole 24b, following through hole 25b, supporting driving shaft 13 can rotate live axle.In more detail, upper bearing 24, lower bearing 25 and cylinder 21 comprise several joining holes of mutual correspondence separately, are respectively joining hole 24a, descend in conjunction with 25a, cylinder in conjunction with 21a.In addition, upper bearing 24, lower bearing 25 are combined closely on cylinder 21 upper and lower in sealing fluid chamber 29 by bonded blocks such as screw bolt and nut.

The path of suction 24d is arranged on upper bearing 24, be communicated with suction pipe 7.Also form inlet hole 26 in addition, communication of fluid chamber 29 and suction path 24d.Inlet hole 26 is the fluid that will compress, to fluid chamber 29 water conservancy diversion.In addition, shown in Figure 3 as Fig. 2, sucking path 24d is a kind of hole, sucks path 24d and runs through upper bearing 24.But the shape that sucks path 24d do not limit to figure in poroid.Such as, sucking path 24d also can be a kind of sleeve-shaped, is communicated with inlet hole 26 and suction pipe 7.

In addition, suck path 24d and can directly be communicated with suction pipe 7 and inlet hole 26.Also can be as Fig. 2, shown in Figure 3, by inflatable chamber 40 indirect communication.Inflatable chamber 40 comprises the storage area 41 of broad in inside, can keep in the fluid that flows to by suction pipe 7.As shown in Figure 3, inflatable chamber 40 is covered with the part upside space of upper bearing 24.Inflatable chamber 40 directly is communicated with inlet hole 26, can accommodating fluid.Inflatable chamber 40 can directly be fixed on the upper bearing 24 by welding, and also can be assembled on cylinder 21 and upper bearing 24, the lower bearing 25 by assembling part.Inflatable chamber 40 comprises the inflation lumen pore 42 that can insert Upper shaft sleeve 24c.For accommodating fluid stably, inflatable chamber 40 volumes are that 100% to 400% of fluid chamber 29 volumes are advisable.For store fluid, inflatable chamber 40 also links with suction pipe 7.In more detail, inflatable chamber 40 links by certain suction path 24d and suction pipe 7.At this moment, suck path 24d and can run through upper bearing 24 formation.

Like this, inflatable chamber 40 is set after, can form storage area 41 between inflatable chamber 40 and the upper bearing 24.Sucking path 24d is communicated with storage area 41.Fluid chamber 29 is communicated with inflatable chamber 40 by inlet hole 26.Here, inlet hole 26 runs through upper bearing 24, links fluid chamber 29 and inflatable chamber 40.In order to link fluid chamber 29 and inflatable chamber 40, when inlet hole 26 runs through upper bearing 40, vertically run through with the shortest distance.Like this, inflatable chamber 40 form can store fluid the space, buffering sucks the variation in pressure of fluid, to inlet hole 26, stably accommodating fluid.Knockout drum 8 can be assisted or replace to inflatable chamber 40.

Several tap holes are arranged on lower bearing 25, be respectively the first tap hole 27a and the second tap hole 27b.The first tap hole 27a, the second tap hole 27b are communicated with fluid chamber 29, can discharge the fluid after the compression.The first tap hole 27a, the second tap hole 27b can directly be communicated with fluid chamber 29, also can be communicated with fluid chamber 29 by certain path on cylinder 21 and lower bearing 25.In addition, in order to open and close the first tap hole 27a, the second tap hole 27b, on upper bearing 25, form expulsion valve 27c, 27d.Expulsion valve 27c, 27d only when the pressure arrival certain pressure of fluid chamber 29 is above, just open the first tap hole 27a, the second tap hole 27b.For this reason, the end of expulsion valve 27c, 27d be fixed on the first tap hole 27a, the second tap hole 27b near, the other end is to be advisable from the plate-shaped springs of dynamic deformation.As shown in Figure 3, for the stable operation of expulsion valve 27c, 27d, also can form discharge baffle plate 27e, 27f on the top of expulsion valve 27c, 27d, so that the restrained deformation amount.Discharge the stable operation of baffle plate 27e, 27f guarantee expulsion valve 27c, 27d, can contact, the open amount of restriction expulsion valve 27c, 27d with expulsion valve 27c, 27d.If do not discharge baffle plate 27e, 27f, then might cause expulsion valve 27c, 27d overbending under high pressure, influence expulsion valve 27c, 27d proper functioning.

In addition,, baffler 30 can be set, reduce the noise of discharging when being compressed fluid in the bottom of lower bearing 25.As shown in Figure 3, baffler 30 is located at the below of lower bearing 25.Between lower bearing 25 and baffler 30, form certain space.After baffler 30 was set, when the fluid in the fluid chamber 29 was discharged by the first tap hole 27a, the second tap hole 27b, the space in baffler 30 expanded.Baffler 30 is pressed the noise reduction principle of expansion type muffler, carries out noise reduction.

After the first tap hole 27a, the second tap hole 27b discharge by lower bearing 25, flow into the fluid in the baffler 30, as shown in Figure 3, discharge to the upside space of cylinder 21 by drain passageway 50.As Fig. 2, shown in Figure 3, drain passageway 50 is by running through lower bearing 25 successively, and cylinder 21 after each hole 51,52,53 combination of upper bearing 24, forms continuous path.After this drain passageway 50 is set, as shown in Figure 1, compressed fluid in the press part 20, flow to the upside space of press part 20 after, flow through power part 10, by discharge tube 9, discharge to compressor is outside.

In addition, as Fig. 2, shown in Figure 3, drain passageway 50 can be made up of each hole 51,52,53, also can be made up of discharge conduit 55 by as shown in Figure 6.One end of discharge conduit 55 is communicated with baffler 30, and the other end is communicated with the upper space of press part 10.In addition, compressor of the present invention also can not adopt baffler 30, and allows discharge conduit 55 directly be communicated with the first tap hole 27a, the second tap hole 27b.

Also have, the revolution direction of compressing roller 22 and the position of inlet hole 26 for embodiments of the invention, are the key factors of decision compression volume.

Fig. 4 a is in the rotary compressor of the present invention, when compressing roller revolves round the sun by counter clockwise direction, and the state sectional view of cylinder interior.In the sectional elevation of cylinders 21 such as Fig. 4 a, in fact inlet hole 26 can not show, so the position with dashed lines of inlet hole 26 draws.

Shown in Fig. 4 a, fluid chamber 29 is divided into two space 29a, 29b by spacer 23 and compressing roller 22.With spacer 23 is the center, and the first tap hole 27a, the second tap hole 27b are arranged in the both sides of spacer 23 respectively.This is for when compressing roller revolves round the sun by any direction, can both compress.When compressing roller 22 revolves round the sun to any direction, between inlet hole 26 and spacer 23, at least always there is one among the first tap hole 27a, the second tap hole 27b.Identical being advisable of distance between the spacer 23 and the first tap hole 27a, the second tap hole 27b.

During compressing roller 22 rotations, among two space 29a, the 29b that spacer 23 and compressing roller 22 form, some spaces form discharge portion.Discharge portion is used for compression, discharges fluid.Here, discharge portion is by the revolution direction decision of compressing roller 22.Shown in Fig. 4 a, when compressing roller 22 revolved round the sun by counter clockwise direction, the rightward space 29b of compressing roller 22 became discharge portion.And shown in Fig. 4 b, if compressing roller 22 revolves round the sun in the direction of the clock, then the leftward space 29a of compressing roller 22 becomes discharge portion.

In addition, compression volume is discharged from the volume decision of the 29a of portion, 29b.Here, exactly the volume of discharge portion 29a, 29b is made definition, the volume of discharge portion is, from inlet hole 26 to spacer 23, and the spatial volume of being encircled by cylinder 21 and compressing roller 22.Therefore, the compression volume position that is inhaled into hole 26 determines.

As an example, when inlet hole 26 was positioned on the elongation line of spacer 23, when having 180 ° of angles with spacer 23, fluid chamber 29 was divided into two identical parts of volume.Therefore, when compressing roller 22 was pressed any direction revolution, compression volume was identical.

But, if inlet hole 26 is as the criterion with the elongation line of spacer 23, be positioned at a certain side, then fluid chamber 29 is divided into two different parts of volume.Shown in Fig. 4 a, fluid chamber 29 is divided into leftward space 29a and rightward space 29b.In leftward space 29a, the distance from spacer 23 to inlet hole 26 is littler than the distance in rightward space 29b.Here, each space 29a, 29b press each self-forming discharge portion of revolution direction of compressing roller 22.And each discharge portion forms the relative little low pressure discharge portion 29a with volume of the big relatively high pressure discharge portion 29b of volume respectively.Rotary compressor of the present invention, the revolution direction of pressing compressing roller 22 comprises the dual compression capacity.

At this moment, the position of inlet hole 26 is by the compression factor decision of high pressure discharge portion 29b and low pressure discharge portion 29a.As an example, inlet hole 26 is positioned at spacer 23 and forms 180 ° of positions to 300 ° of angles among the present invention.At this moment, if compression ratio is 50: 50, then inlet hole 26 is positioned at 180 ° position.If compression ratio is 75: 25, then inlet hole 26 is positioned at general 270 ° position.

Below, the effect to rotary compressor of the present invention is elaborated.

Fig. 4 A is in the rotary compressor of the present invention to Fig. 4 D, when compressing roller revolves round the sun by counter clockwise direction, and the order sectional view of cylinder interior state.Fig. 4 a is for sucking the incipient stage schematic representation, and Fig. 4 b is compression, discharges the stage schematic representation, and Fig. 4 c is for discharging the ending phase schematic representation, and Fig. 4 d is the vacuum field schematic representation that forms in the fluid chamber.

At first, compressing roller 22 is under the turning effort of live axle 13, along the inner peripheral surface rolling of cylinder 21, by revolution counterclockwise.In this process, inlet hole 26 is flow to gas by inlet hole 26 to fluid chamber 29 by open.At this moment, gas flows into high pressure discharge portion 29b under the effect of compressing roller 22.This situation with Fig. 4 a is identical.

Then, when compressing roller 22 continued revolution, the volume of high pressure discharge portion 29b diminished gradually, the gas in the compression high pressure discharge portion 29b.In this process, spacer 23 flexiblely moves forward and backward under the effect of spring 23a and compressing roller 22, keeps the sealing state of high pressure discharge portion 29b.Meanwhile, by inlet hole 26, continue to flow to new fluid.

Afterwards, when the pressure of high pressure discharge portion 29b arrival certain pressure was above, the expulsion valve 27d of high pressure discharge portion 29b one side was by opening.Thereupon, the fluid of high pressure discharge portion 29b begins row to baffler 30 by tap hole 27b.This is identical with the situation shown in Fig. 4 b.

Next, compressing roller 22 continues revolution, and the fluid of high pressure discharge portion 29b is all by tap hole 27b, and row is to baffler 30.After draining fluid by tap hole 27b, expulsion valve 27d under the elasticity of self, sealing tap hole 27b.This is identical with the situation shown in Fig. 4 c.

Afterwards, compressing roller 22 continues by revolution counterclockwise, and thereupon, gas sucks by process, and compression flows to baffler 30 after the discharge.

One side of fluid chamber 29 can form vacuum field V.Shown in Fig. 4 d, after the end discharge stage, when compressing roller 22 continued revolution, the fluid in the fluid chamber 29 was under the effect of compressing roller 22, to high pressure discharge portion 29b side shifting.On the contrary, the field that compressing roller 22 rolls across among the leftward space 29a that spacer 23 and compressing roller 22 are divided, produces vacuum field V.Vacuum field V exists always, till compressing roller 22 continues the open inlet hole 26 in revolution back.Therefore, compressing roller 22 every rotations once, vacuum field V also can produce once.

Fig. 5 A is in the rotary compressor of the present invention to Fig. 5 D, when compressing roller revolves round the sun in the direction of the clock, and the order sectional view of cylinder interior state.Fig. 5 a is for sucking the incipient stage schematic representation, and Fig. 5 b is compression, discharges the stage schematic representation, and Fig. 5 c is for discharging the ending phase schematic representation, and Fig. 5 d is the vacuum field schematic representation that forms in the fluid chamber.

Compressing roller 22 is under the counterrotating effect of live axle 13, along the inner peripheral surface rolling of cylinder 21, revolution in the direction of the clock.In this process, inlet hole 26 is flow to gas by inlet hole 26 to fluid chamber 29 by open.At this moment, gas flows into low pressure discharge portion 29a under the effect of compressing roller 22.This situation with Fig. 5 a is identical.

Then, when compressing roller 22 continued revolution, the volume of low pressure discharge portion 29a diminished gradually, the gas in the compression and low pressure discharge portion 29a.Meanwhile, by inlet hole 26, continue to flow to new fluid.

Afterwards, when the pressure of low pressure discharge portion 29a arrival certain pressure was above, the expulsion valve 27c of low pressure discharge portion 29a one side was by opening.Thereupon, the fluid of low pressure discharge portion 29a begins row to baffler 30 by the first tap hole 27a.This is identical with the situation shown in Fig. 5 b.

Next, compressing roller 22 continues revolution, and the fluid of low pressure discharge portion 29a is all by the first tap hole 27a, and row is to baffler 30.After draining fluid by the first tap hole 27a, expulsion valve 27c seals the first tap hole 27a under the elasticity of self.This is identical with the situation shown in Fig. 5 c.

Afterwards, compressing roller 22 continues revolution in the direction of the clock, and thereupon, gas sucks by process, and compression flows to baffler 30 after the discharge.

Identical with counter clockwise direction rotation situation, during the course, a side of fluid chamber 29 can form vacuum field V.Shown in Fig. 5 d, after the end discharge stage, when compressing roller 22 continued revolution, the fluid in the fluid chamber 29 was under the effect of compressing roller 22, to low pressure discharge portion 29a side shifting.On the contrary, in the field that compressing roller 22 rolls across, produce vacuum field V.Vacuum field V is in the rightward space 29b of spacer 23 and compressing roller 22 divisions.Vacuum field V exists always, till compressing roller 22 continues the open inlet hole 26 in revolution back.At this moment, the time that vacuum field V exists, the time that produces when rotating by counter clockwise direction than compressing roller 22 is long.

As shown in Figure 1, the pressurized gas of baffler 30 inside is by the inner space of exhaust port row to shell 1.Afterwards, pressurized gas flows to top by space between rotor 30 and the stator 20 or the space between stator 20 and the shell 1.Then, pressurized gas flows to the destination of regulation by discharge tube 9.

In addition, only possess under the situation of structure, though can regulate compression volume by forward and reverse rotation, there is following hidden danger in rotary compressor of the present invention.

Shown in Fig. 4 d, Fig. 5 d, and produce periodic vacuum field V in the institute chamber, and this vacuum field V can cause rapid variation in pressure.Under the revolution effect of compressing roller 22, when tap hole 26 is opened, between vacuum field V and inlet hole 26, can produce sizable pressure difference.This variation in pressure can cause following several problem points.The first, variation in pressure might reduce the efficient of compressor.The second, variation in pressure produces sizable load to live axle 13, consumes a lot of power.The 3rd, variation in pressure might produce periodic noise in inlet hole 26.For the elimination problem, be necessary to eliminate vacuum field V from structure.For this reason, need design particularly to consider compression efficiency to the structure of vacuum field V accommodating fluid, accommodating fluid is that the fluid before the compression is advisable.Therefore, in the first embodiment of the present invention, provide by-pass structure, the gas of inlet hole 26 is supplied to vacuum field V.

Here, by-pass structure possesses following feature.The first, by-pass structure is unidirectional path.Gas before by-pass structure only allows to compress flows to fluid chamber, and does not allow reverse circulated.This is in order to prevent that gas from passing through the by-pass structure water conservancy diversion.The second, by-pass structure possesses the valve of pressing force difference automatic opening-closing.Because by-pass structure is an one-way passage, need be used to control the valve of switching.The 3rd, by-pass structure has two one-way passage.As previously mentioned, fluid chamber is as the criterion with spacer 23 and is divided into high pressure discharge portion 29b and low pressure discharge portion 29a.The revolution direction that high pressure discharge portion 29b and low pressure discharge portion 29a press compressing roller 22 comprises different vacuum field V respectively.For at compressing roller 22 arbitrarily to when rotation, can both eliminate vacuum field V, in the by-pass structure, a path is communicated with high pressure discharge portion 29b, another is communicated with low pressure discharge portion 29a.Four, by-pass structure comprises reservoir part, stores the preceding gas of compression.By-pass structure is a kind of path that connects inlet hole 26 and fluid chamber.Therefore, when possessing by-pass structure, can be always to the vacuum field of fluid chamber V supply gas.

Below, with reference to accompanying drawing, the instantiation to by-pass structure is elaborated.Fig. 6 is the press part variation longitudinal section among Fig. 3, illustrates simple by-pass structure embodiment.

As shown in Figure 6, by-pass structure 28a, 28b are located on the upper bearing 24.By-pass structure 28a, 28b link inflatable chamber 40 and fluid chamber 29.In more detail, by-pass structure 28a, 28b are communicated with each space 29a, 29b of inflatable chamber 40 and fluid chamber 29 respectively.This by-pass structure 28a, 28b can be corresponding and the first tap hole 27a, the second tap hole 27b of lower bearing 25, are located on the upper bearing 24.

On by-pass structure 28a, 28b, bypath valve 28c, 28d are set.Bypath valve 28c, 28d allow the compression before fluid from inflatable chamber 40 to the fluid chamber one-way flow.Bypath valve 28c, 28d are a kind of plate-shaped springs, and the one end is supported on the groove of by-pass structure 28a, 28b, and the other end is kept free state.Bypath valve 28c, 28d open and close by-pass structure 28a, 28b under the elastic reaction of self.Here, bypath valve 28c, 28d when only the arrival of the pressure between by-pass structure and fluid chamber certain pressure is above, just open by-pass structure.

In addition, inside grooves also is provided with by-pass baffles 28e, 28f.By-pass baffles 28e, 28f ensure the stable operation of bypath valve 28c, 28d.By-pass baffles 28e, 28f can contact with bypath valve 28c, 28d, the degree of opening of restriction bypath valve 28c, 28d.

In addition, by-pass structure can be made up of several holes of running through upper bearing 24 and cylinder 21.These communication of fluid chambeies, hole and suction path 24d or inflatable chamber 40.At this moment, the end such as the hole is communicated with the other end and inflatable chamber 40 or suction path 24d binding with the sidewall of cylinder 21.When by-pass structure has this structure, suck the fluid in path 24d or the inflatable chamber 40, can flow through the hole,, flow in the fluid chamber 29, have identical effect with embodiment among Fig. 6 by cylinder 21 sidewalls.

Comprise in the rotary compressor of by-pass structure that the process of removing the vacuum field is as follows.When compressing roller 22 rotated by counter clockwise direction, the fluid among the high pressure discharge portion 29b discharged by tap hole 27b.After shown in Fig. 4 c, discharging end, when compressing roller 22 continues rotation, shown in Fig. 4 d, between compressing roller 22 and spacer 23, can produce the vacuum field.When compressing roller 22 continued rotation, it is big that the vacuum field can become gradually.At this moment, be the boundary with bypath valve 28c, it is big that the pressure difference between vacuum field and the inflatable chamber 40 also becomes thereupon.And bypath valve 28c is opened under action of pressure.After bypath valve 28c was open, fluid can pass through by-pass structure 28a before the compression in the inflatable chamber 40, entered among the space 29a in the fluid chamber 29, eliminated the vacuum field.In addition, when compressing roller 22 rotates in the direction of the clock, can pass through by-pass structure 28b too, from the space 29a of inflatable chamber 40 in fluid chamber 29, the fluid before the supply compression can be eliminated the vacuum field effectively.

In addition, Fig. 7 is another embodiment's decomposing schematic representation of rotary compressor press part of the present invention.Fig. 8 is the compressor compresses portion sectional view among Fig. 7.Fig. 9 is the compressor cylinder interior sectional view among Fig. 7.Among the present invention press part also possess with Fig. 2 to another different embodiment of the embodiment among Fig. 6.Below, with reference to accompanying drawing,, be elaborated to another embodiment of the present invention.

In the another embodiment of the present invention, compressor is by shell and the power part that is positioned at enclosure, and press part is formed.The structure of shell and power part is identical to the embodiment among Fig. 6 with Fig. 1.As shown in Figure 7, press part is by cylinder 21, compressing roller 22, and upper bearing 24 and lower bearing 25 are formed.Cylinder 21 is fixed on the shell 1.Compressing roller 22 is positioned at cylinder 21 inside.Upper bearing 24, lower bearing 25 are located at the top and the bottom of cylinder 21 respectively.In addition, press part is provided with valve assembly 60 between upper bearing 24 and cylinder 21.Also have, press part also is included in the inflatable chamber 40 of upper bearing 40 tops, and the baffler below lower bearing 25 30.Below, in another embodiment of the present invention, Fig. 1 to the different position of the embodiment among Fig. 6,, is elaborated to Fig. 9 with reference to Fig. 7.

On upper bearing 24, form several inlet holes 41a, 41b, 41c, be communicated with fluid chamber 29.Each inlet hole 41a, 41b, the fluid of 41c before the compression of fluid chamber 29 water conservancy diversion.Possess under the situation of inflatable chamber 40, each inlet hole 41a, 41b, 41c are communicated with inflatable chamber 40.On lower bearing 25, form the first tap hole 27a, the second tap hole 27b.The first tap hole 27a, the second tap hole 27b are communicated with fluid chamber 29, can discharge the fluid after the compression.

These inlet holes 41a, 41b, 41c and the first tap hole 27a, the second tap hole 27b are the key factors of decision rotary compressor compression volume.To this, to Figure 10 b, be elaborated with reference to Fig. 9.Among Fig. 9,, only show the cylinder 21 that combines with upper bearing 24 for outstanding expression inlet hole 41a, 41b, 41c.Originally, can not see the first tap hole 27a, the second tap hole 27b on lower bearing 25 on Fig. 9, so tap hole 27a, 27b with dashed lines draw.

At first, compressor of the present invention comprises the first tap hole 27a, the second tap hole 27b more than 2 at least.As shown in the figure, no matter compressing roller 22 is pressed any direction rotation, between the inlet hole and spacer 23 in the compressing roller revolution path, there is at least 1 tap hole.Could discharge compressed gas like this.Therefore, on each sense of rotation, a tap hole need be set all.Compressor of the present invention like this at compressing roller 22, when promptly live axle 13 is pressed any direction rotation, can both be discharged pressurized gas.In addition, compressing roller 22 is the closer to spacer 23, and then in each space 29a, 29b, the fluid chamber volume of compressed fluid becomes more little.Thereupon, in order to discharge the fluid of compression to greatest extent, the first tap hole 27a, the second tap hole 27b form suitable near spacer 23 subtends.Scheme as shown, the first tap hole 27a, the second tap hole 27b lay respectively at the both sides of spacer 23.In addition, the first tap hole 27a, the second tap hole 27b form suitable near spacer 23 as far as possible.

Between the first tap hole 27a, the second tap hole 27b and compressing roller 22, each inlet hole 41a, 41c are set, on the suitable position so that compressed fluid.In fact, in the rotary compressor, fluid is compressed in a certain inlet hole between a certain tap hole in compressing roller 22 revolution paths.Inlet hole is with respect to the determining positions compression volume that respective row is portalled.And, can obtain two compression volumes by using different inlet hole 41a, 41c by sense of rotation.Compressor of the present invention comprises correspondingly the first inlet hole 41a, the second inlet hole 41c corresponding to the first tap hole 27a, the second tap hole 27b.In order to obtain two different compression volumes, these inlet holes are as the criterion with the center, and several angle staggers.

The first inlet hole 41a preferably be positioned at spacer 23 near.Compressing roller 22 is illustrated as counterclockwise during by a certain direction rotation, from the first inlet hole 41a, fluid is compressed to is positioned at the second tap hole 27b of spacer to crossing.Under the effect of the first inlet hole 41a, compressing roller 22 utilizes whole fluid chamber 29 compressed fluids, thus the maximum compression capacity on possessing counterclockwise.The fluid that is equivalent to fluid chamber 29 overall volume is compressed.As shown in Figure 9, in fact the first inlet hole 41a is 10 ° with the spacer 23 angle θ 1 that staggers.Among the accompanying drawing embodiment of the present invention, by the angle of the θ 1 that counterclockwise staggers, angle θ 1 time, tap hole and spacer 23 can not interfered mutually, can use fluid chamber 29 integral body in the compression.

The second inlet hole 41c and the first inlet hole 41a are as the criterion with the center, press several angle and isolate.When compressing roller 22 rotates in the direction of the clock,, fluid is compressed to the first tap hole 27a from the second inlet hole 41c.The second tap hole 27b and spacer 23 stagger with sizable angle in the direction of the clock.Therefore 22 of compressing rollers utilize the part of fluid chamber 29 to compress.Thereby, have and counterclockwise littler compression volume.Compression is equivalent to the fluid of fluid chamber 29 partial volumes.The second inlet hole 41c and spacer 23 angle theta 2 in the direction of the clock is advisable with 90 ° to 180 °.In addition, poor for the suitable compression volume that obtains on each sense of rotation, and in order to discharge interference each other, the second inlet hole 27b and the first inlet hole 41a subtend are set to suitable.

As shown in Figure 9, each inlet hole 41a, 41c can possess round-shaped.In addition, in order to increase intake, inlet hole 41a, 41c can possess multiple shapes such as rectangle.And then rectangle inlet hole 41a, 41c can also have certain curvature shown in Fig. 7, Figure 10 a, Figure 10 b.By this curvature, can reduce to greatest extent and adjacent component, particularly the interference between the compressing roller 22.

In addition, in order on each sense of rotation, to obtain required compression volume, on a certain sense of rotation, can only there be an effective inlet hole.If have two inlet holes on the rotate path of compressing roller 22, then will can not compress between these inlet holes.When the first inlet hole 41a is open, seal the second inlet hole 41c, otherwise also together.Therefore, valve assembly 60 is set in the compressor of the present invention, presses the revolution direction of compressing roller 22, open some among inlet hole 41a, the 41c with being allowed a choice.

As Fig. 7, shown in Figure 10 a, Figure 10 b, valve assembly 60 comprises that first valve 61 and second valve, 65, the first valves 61 and second valve 65 are located between cylinder 21 and the upper bearing 24.These valves and each inlet hole 41a, 41b, 41c link.

As shown in Figure 7, first valve 61 is a disc parts, is located at below the eccentric part 13a of live axle 13, with it contact.Thereby, live axle 13 rotations, i.e. during compressing roller 22 revolution, first valve 61 is rotated by identical direction.First valve 61 possesses than the bigger diameter of cylinder 21 internal diameters is advisable.The peripheral portion of first valve 61 is supported by cylinder 21, can stably rotate.

First valve 61 comprises the first opening portion 61b, the second opening portion 61c and valve through hole 61a.The first opening portion 61a, the second opening portion 61c are communicated with the first inlet hole 41a, the second inlet hole 41c on specific sense of rotation.Live axle 13 runs through valve through hole 61a.In more detail, the first opening portion 61a,, under the rotation of first valve 61, be communicated with the first inlet hole 41a, and the second inlet hole 41c is sealed by the main body of first valve 61 during at compressing roller 22 by a certain direction rotation.In addition, when the second opening portion 61c presses the other direction rotation at compressing roller 22, be communicated with the second inlet hole 41c.At this moment, the first inlet hole 41a is sealed by the main body of first valve 61.These first opening portions 61a, the second opening portion 61c can possess round-shaped as among Fig. 9, also can possess the polygon shape.In addition, as shown in Figure 7.Each opening portion 61a, 61c can be the rectangle of certain curvature.At this moment, it is big that the size of opening portion becomes, and can pass through fluid better.If these each opening portion 61a, 61c are near being formed centrally in first valve 61, the then interference between generation and compressing roller 22 and the eccentric part 13a easily.And, might cause the spatial communication between opening portion 61a, 61c and compressing roller 22 and the eccentric part 13a like this, there is hidden danger along live axle 13 leak fluid.Therefore, opening portion 61a, 61c form suitable near the outer peripheral surface of first valve 61.

In addition, on sense of rotation separately,, allow first valve 61 open the first or second inlet hole 41a, 41c respectively by regulating the angle of swing of first valve 61.When live axle 13 rotates by a certain direction, allow the first opening portion 61a be communicated with when sealing the second inlet hole 41c with the first inlet hole 41a.By another sense of rotation rotation the time, allow the first opening portion 61a be communicated with when sealing the first inlet hole 41a with the second inlet hole 41c.This, utilize the inlet hole control of single opening portion 61a, can simplify the structure of first valve 61 more.

In addition, second valve 65 is fixed between cylinder 21 and the upper bearing 24, the motion of first valve 61 that leads.Second valve 65 has annular shape, and comprises assembly department 65b, can built-in first valve 61.On second valve 65, form valve joining hole 65a.By valve joining hole 65a, second valve, 65 combined parts are combined in cylinder 21 and upper bearing 24, lower bearing 25.In addition, in order to prevent escape of liquid and stably to support, the thickness of second valve 65 and first valve, 61 identical being advisable.First valve 61 is by cylinder 21, and part supports.Therefore, in order to form the gap, so that allow second valve 65 rotate swimmingly, the thickness of first valve 61 can be thinner slightly than the thickness of second valve 65.

In addition, as shown in Figure 9, when turning clockwise, compressing roller 22 revolves round the sun from spacer 23 before the second inlet hole 41c, and the suction or the discharge of fluid can not take place between spacer 23 and the compressing roller 22.Therefore, among the field V that compressing roller 22 rolls across vacuum state can appear.This vacuum field V can bring the power loss of live axle 13, and produces very big noise.In order to eliminate this vacuum field V, form the 3rd inlet hole 41b on the lower bearing 25.The 3rd inlet hole 41b is between the second inlet hole 41c and spacer 23, and before compressing roller 22 rolled across the second inlet hole 41c, accommodating fluid between compressing roller 22 and spacer 23 prevented to produce vacuum state.In order to eliminate vacuum state soon, the 3rd inlet hole 41b is advisable near spacer 23.The 3rd inlet hole 41b works on the sense of rotation different with the first inlet hole 41a.Therefore the 3rd inlet hole 41b subtend forms suitable in the first inlet hole 41a.In fact, the 3rd inlet hole 41b and spacer 23 angle theta 3 are 10 °.The 3rd inlet hole 41b is identical with the first or second inlet hole 41a, 41c, can possess the rectangular shape of circle or angle lap.

This 3rd inlet hole 41b works with the second inlet hole 41c.Therefore, when compressing roller 22 revolved round the sun by a certain direction, these inlet holes 41b, 41c will open simultaneously.Therefore first valve 61 also comprises the 3rd opening portion.When the second inlet hole 41c was open, the 3rd opening portion was communicated with the 3rd inlet hole 41b.Though it is this 3rd opening portion can be separately on first valve 61, preferably suitable by being shaped as among Figure 10 a, Figure 10 b.Because the first inlet hole 41a, the 3rd inlet hole 41b are adjacent, can allow the first opening portion 61a by sense of rotation by the angle of swing of first valve 61, open first inlet hole 41a or the 3rd inlet hole 41b.

The sense of rotation that first valve 61 is pressed compressing roller 22 can be opened inlet hole 41a, 41b, 41c.But,, accurately open corresponding inlet hole in order to obtain required compression volume.In addition, can obtain the accurate opening of each inlet hole by the angle of swing of control first valve.Thereby, preferably include the structure that limits first valve, 61 angle of swing on the valve assembly 60.

Shown in Figure 10 a, 10b, limiting structure can be made up of protuberance 62 and groove 66.Protuberance 62 is given prominence to radial direction from first valve 61 and is formed.Groove 66 can be by the built-in protuberance 62 of movable manner on second valve 65.Here, groove 66 does not take the internal volume of cylinder 21 on second valve 65.Therefore, do not form the dead angle, promptly do not form and can not compress in cylinder interior, or the field of not compressing.

In addition, limiting structure also can be made up of following protuberance 62 and groove 66, can have a lot of variation.Protuberance 62 presses from second valve 65 that radial direction is inwardly outstanding to be formed, and groove 66 is on first valve 61, can be by the built-in protuberance of movable manner.

When adopting limiting structure, if live axle 13 is by counterclockwise rotating, then shown in Figure 10 a, protuberance 62 hangs on the end of groove 66.Thereupon, the first opening portion 61a is communicated with the first inlet hole 41a, allow fluid flow into, and the second inlet hole 41c, the 3rd inlet hole 41b is closed.In contrast, when live axle 13 rotated in the direction of the clock, shown in Figure 10 b, protuberance 62 hung on the other end of groove 66.Thereupon, the first opening portion 61a and the second opening portion 61c are communicated with the 3rd inlet hole 41b and the second inlet hole 41c, allow fluid flow to, and the first inlet hole 41a is by 61 sealings of first valve.

In another embodiment of the present invention, the effect to compressor is described in detail as follows.

During Figure 11 a is compressor among Fig. 7 to Figure 11 c, compressing roller when counterclockwise rotating, the order sectional view of cylinder interior state.

Figure 11 a is a live axle 13 when counterclockwise rotating, the phase diagram of each parts of cylinder interior.At first, the first inlet hole 41a is communicated with the first opening portion 61a, and the second inlet hole 41c and the 3rd inlet hole 41b are closed.In this anticlockwise rotation, explanation was carried out with reference to accompanying drawing 10a in the state front of each inlet hole.

When the first inlet hole 41a was open, compressing roller 22 rolled along the inner peripheral surface of cylinder 21 under the turning effort of live axle 13, revolves round the sun by counter clockwise direction.When compressing roller 22 continued revolution, shown in Figure 11 b, space 29b diminished gradually, and the fluid that originally was inhaled into is compressed.In this course, spacer 23 to some extent flexibly moves up and down under the effect of elastic member 23a, and fluid chamber 29 is divided into two enclosed space 29a, 29b.Meanwhile, by the first inlet hole 41a, fluid continues to flow to space 29a, so that prepare for compress next time.

When the hydrodynamic pressure arrival certain value in the 29b of space was above, the second expulsion valve 27d was by opening.Shown in Figure 11 c, at this moment discharge fluid by the second tap hole 27b.After draining fluid, the second expulsion valve 27d seals the second tap hole 27b under the elastic reaction of self.

Like this, finish a compression process after, compressing roller 22 continues to repeat same compression process by revolution counterclockwise.In the compression process in the counterclockwise direction, compressing roller 22 is revolving round the sun the second tap hole 27b compressed fluid from the first inlet hole 41a.As previously mentioned, the first inlet hole 41a and the mutual subtend of the second tap hole 27b be located at spacer 23 near.Therefore, in the compression process in the counterclockwise direction, compressor utilizes bulk flow body cavity 29 to compress, thereby obtains maximum compression volume.

Figure 12 a is in the rotary compressor of the present invention to Figure 12 c, the cylinder interior compression process precedence diagram when compressing roller rotates in the direction of the clock.

Figure 12 a is a live axle 13 when rotating in the direction of the clock, each unit status schematic representation of cylinder interior.At this moment, the first inlet hole 41a is closed, and the second inlet hole 41c and the 3rd inlet hole 41b are communicated with respectively with the second opening portion 61c and the first opening portion 61a.If first valve 61 comprises the 3rd opening portion, then the 3rd inlet hole 41b is communicated with the 3rd opening portion.In this clockwise rotation, explanation was carried out with reference to accompanying drawing 10b in the state front of each inlet hole.

If the second inlet hole 41c, the 3rd inlet hole 41c, 41b open, then compressing roller 22 along the inner peripheral surface of cylinder 21, rolls under the clockwise turning effort of live axle in the direction of the clock.In the revolution of this starting stage, compressing roller 22 arrives the fluid that sucks before the second inlet hole 41c and can not be compressed, but shown in Figure 12 a, by the second inlet hole 41c, is compressed roller 22 rows to cylinder 21 outsides.Thereby shown in Figure 12 b, fluid begins to be compressed after compressing roller 22 rolls across the second inlet hole 41c.Simultaneously, the space between the second inlet hole 41c and the spacer 23, promptly space 29b becomes vacuum state.But as previously described, after the revolution of compressing roller 22 began, the 3rd inlet hole 41b was communicated with the first opening portion 61a, can suck fluid.Therefore, by under the fluid effect that sucks, vacuum state is eliminated, and prevents to produce noise and power loss.

When compressing roller 22 continued revolution, space 29a diminished gradually, the original fluid that sucks of compression.In this compression process, spacer 23 to some extent flexibly moves up and down under the effect of elastic member 23a, and fluid chamber 29 is divided into two enclosed space 29a, 29b.Meanwhile, by the second inlet hole 41c and the 3rd inlet hole 41b, fluid continues to flow to space 29b, so that prepare for compress next time.

When the hydrodynamic pressure arrival certain value in the 29a of space was above, shown in Figure 12 c, the first expulsion valve 27c was by opening.At this moment discharge fluid by the first tap hole 27a.After draining fluid, the first expulsion valve 27c seals the first tap hole 27a under the elastic reaction of self.

Like this, finish a compression process after, compressing roller 22 continues revolution in the direction of the clock, repeats same compression process.In the compression process in the clockwise direction, compressing roller 22 is when revolving round the sun the first tap hole 26a from the second inlet hole 41c, and convection cell compresses.Thereby in the clockwise flow process, compressor only utilizes the segment space compressed fluid of fluid chamber 29, compares anticlockwise compression process, can obtain littler compression volume.

In each compression process that illustrates previously, no matter clockwise and counterclockwise, fluid by the first tap hole 27a, second tap hole 27b discharge, flow into baffler 30, and, flow to the rotor 12 of shell 1 inside and the space between the stator 11, and the space between stator 11 and the shell by drain passageway, final by discharge tube 9, to the outside discharge of compressor.Here, drain passageway has various embodiments, and has been described in detail referring to figs. 1 through Fig. 6 in front.

By above-mentioned several embodiments the present invention was carried out explanation, those skilled in the art, based on basic inventive concept of the present invention, can also there be many specific embodiments in the present invention.

Thereby, embodiment and nonrestrictive condition, and be a concrete application examples of the present invention.The scope of the present invention should be as the criterion with the scope that claims are asked for protection and make an explanation.

Claims (55)

1, a kind of rotary compressor, it is characterized by: described rotary compressor comprises fluid chamber (29), compressing roller (22), spacer (23), fluid chamber (29) is positioned at the below of compressor and comprises inlet hole (26) and tap hole (27a, 27b), inlet hole (26) is at the upside of fluid chamber (29), each tap hole (27a, 27b) when pressure arrival certain pressure is above, discharge compressed fluid, the center of compressing roller (22) is from the misalignment of fluid chamber (29), compressing roller (22) rolls along the inwall of fluid chamber (29), and a certain direction in the selection both direction revolves round the sun, the segment space of compressive flow body cavity (29), spacer (23) is positioned at each expulsion valve (27c, 27d), continue the state of keeping in touch with compressing roller (22), fluid chamber (29) is divided into two independently spaces.

2, rotary compressor according to claim 1 is characterized in that: each tap hole (27a, 27b) is that the center equidistantly isolates formation with spacer (23).

3, rotary compressor according to claim 1, it is characterized in that: go up to form at each expulsion valve (27c, 27d) and discharge baffle plate (27e, 27f), when the pressure arrival certain pressure of discharge portion is above, discharge open each expulsion valve (27c, 27d) of baffle plate (27e, 27f).

4, rotary compressor according to claim 1 is characterized in that: described compressor also comprises storage space (41), directly is communicated with inlet hole (26) and possesses the broad space, and storage will be to the fluid of cylinder (21) supply.

5, rotary compressor according to claim 4 is characterized in that: storage space (41) is gone up binding and is sucked path (24d), sucks path (24d) and is used for the preceding fluid of supply compression.

6, rotary compressor according to claim 1, it is characterized in that: described compressor also comprises drain passageway (50), drain passageway (50) links with tap hole (27a, 27b), to the fluid of fluid chamber (29) external upper water conservancy diversion from tap hole (27a, 27b) discharge.

7, rotary compressor according to claim 1, it is characterized in that: described compressor also comprises baffler (30), baffler (30) is located at the downside of fluid chamber (29) and is communicated with tap hole, behind the fluid expansion of tap hole (27a, 27b) discharge, and noise-decreasing.

8, rotary compressor according to claim 1 is characterized in that: described inlet hole (26) is benchmark and is positioned at a certain side with the elongation line of spacer (23).

9, rotary compressor according to claim 8 is characterized in that: described inlet hole (26) is as the criterion with spacer (23), is positioned at 180 ° to 300 ° scope.

10, rotary compressor according to claim 1 is characterized in that: described inlet hole (26) is positioned at the elongation line of spacer (23).

11, a kind of rotary compressor, it is characterized in that: described rotary compressor comprises live axle (13), cylinder (21), upper bearing (24), lower bearing (25), expulsion valve (27c, 27d), compressing roller (22), spacer (23), live axle (13) has eccentric part (13a) and can be by just, opposite spin, the built-in eccentric part of cylinder (21) (13a) also forms fluid chamber (29), the top of upper bearing (24) closed cylinder (21) and supporting driving shaft (13) rotatably, upper bearing (24) comprises inlet hole, inlet hole is communicated with cylinder (21), the bottom of lower bearing (25) closed cylinder (21) and supporting driving shaft (13) rotatably, comprise several tap holes (27a that is communicated with cylinder (13), 27b), expulsion valve (27c, 27d) arrive certain pressure open row (27a that portals when above when the pressure of fluid chamber (29), 27b), compressing roller (22) is located at rotatably that eccentric part (13a) is gone up and rolls along the inner peripheral surface of cylinder (21), spacer (23) is positioned at each tap hole (27a, 27b), be located on the cylinder (13), has elasticity, and remain with compressing roller (22) and to contact, fluid chamber (29) is divided into two separate space.

12, rotary compressor according to claim 11 is characterized in that: each described tap hole (27a, 27b) is as the criterion with spacer (23) and equidistantly staggers.

13, rotary compressor according to claim 11, it is characterized in that: described expulsion valve (27c, 27d) also comprises discharges baffle plate (27e, 27f), discharging baffle plate (27e, 27f) can contact with expulsion valve (27c, 27d), the degree of opening of restriction expulsion valve (27c, 27d).

14, rotary compressor according to claim 11 is characterized in that: described upper bearing comprises suction path (24d), is communicated with inlet hole and supplies the suction pipe that pressure H contracts preceding fluid.

15, rotary compressor according to claim 14 is characterized in that: described compressor also comprises inflatable chamber (40), and inflatable chamber (40) directly is communicated with suction path (24d), and possesses the broad space, stores by flowing into the fluid that path flows to.

16, rotary compressor according to claim 15 is characterized in that: described inflatable chamber (40) is being encircled the top segment space of upper bearing (24).

17, rotary compressor according to claim 15 is characterized in that: described inlet hole runs through upper bearing (24) up and down, is communicated with inflatable chamber (40) and fluid chamber (29).

18, rotary compressor according to claim 11, it is characterized in that: described rotary compressor also comprises by-pass structure (28a, 28b) and bypath valve (28c, 28d), vacuum space and accommodating fluid that by-pass structure (28a, 28b) produces between compressing roller (22) and spacer (23) when compressing roller (22) revolves round the sun, bypath valve (28c, 28d) is on by-pass structure (28a, 28b), and the pressing force difference is controlled by-pass structure (28a, 28b).

19, rotary compressor according to claim 18 is characterized in that: described by-pass structure is located on the upper bearing (24), and its two spaces that suck path (24d) and spacer (23) division link respectively.

20, rotary compressor according to claim 18, it is characterized in that: described bypath valve (28c, 28d) also comprises by-pass baffles (28e, 28f), by-pass baffles (28e, 28f) can contact with bypath valve (28c, 28d), the degree of opening of restriction bypath valve (28c, 28d).

21, rotary compressor according to claim 15, it is characterized in that: described rotary compressor also comprises by-pass structure (28a, 28b) and bypath valve (28c, 28d), vacuum space and accommodating fluid that by-pass structure (28a, 28b) produces between compressing roller (22) and spacer (23) when compressing roller (22) revolves round the sun, bypath valve (28c, 28d) is on by-pass structure (28a, 28b), and the pressing force difference is controlled by-pass structure (28a, 28b).

22, rotary compressor according to claim 21 is characterized in that: described by-pass structure (28a, 28b) is located on the upper bearing (24), is communicated with inflatable chamber (40) and fluid chamber (29).

23, rotary compressor according to claim 21, it is characterized in that: described bypath valve (28c, 28d) also comprises by-pass baffles (28e, 28f), by-pass baffles (28e, 28f) can contact with bypath valve (28c, 28d), the degree of opening of restriction bypath valve (28c, 28d).

24, rotary compressor according to claim 21 is characterized in that: compressor also comprises drain passageway (50), and drain passageway (50) links with tap hole (27a, 27b), and the fluid that tap hole (27a, 27b) is discharged is also discharged to the upside water conservancy diversion.

25, rotary compressor according to claim 24 is characterized in that: an end of described drain passageway (50) and tap hole (27a, 27b) link, the upside spatial communication of the other end and upper bearing (24).

26, rotary compressor according to claim 25 is characterized in that: described drain passageway (50) is a kind of pipeline, and one end and tap hole (27a, 27b) link, the upside spatial communication of the other end and upper bearing (24).

27, rotary compressor according to claim 24, it is characterized in that: drain passageway (50) comprises discharge conduit (55) and baffler (30), discharge conduit (55) is communicated with the upper space of upper bearing (24), and baffler (30) is communicated with discharge conduit (55) and tap hole (27a, 27b).

28, rotary compressor according to claim 27 is characterized in that: described baffler (30) is located at the below of lower bearing (25), and the compressed fluid to tap hole (27a, 27b) is discharged expands, and reduces noise.

29, rotary compressor according to claim 27, it is characterized in that: described discharge conduit (55) runs through lower bearing (25) successively and upper bearing (24) back forms, the one end is communicated with baffler (30), the upside spatial communication of the other end and upper bearing (24).

30, rotary compressor according to claim 27 is characterized in that: described discharge conduit (55) is formed by pipeline, and the one end is communicated with baffler (30), the upside spatial communication of the other end and upper bearing (24).

31, rotary compressor according to claim 11 is characterized in that: the elongation line with spacer (23) is as the criterion, and inlet hole (26) is positioned on a certain side.

32, rotary compressor according to claim 31 is characterized in that: described inlet hole (26) is as the criterion with spacer (23), is positioned at 180 ° to 300 ° scope.

33, rotary compressor according to claim 11 is characterized in that: described inlet hole (26) is positioned at the elongation line of spacer (23).

34, rotary compressor according to claim 11 is characterized in that: described spacer is subjected to elastic force from being located at the spring between cylinder (21) and the spacer (23).

35, a kind of rotary compressor, it is characterized in that: described rotary compressor comprises live axle (13), cylinder (21), upper bearing (24), valve assembly (60), lower bearing (25), expulsion valve (27c, 27d), compressing roller (22), spacer (23), live axle (13) has eccentric part (13a) and can be by just, opposite spin, the built-in eccentric part of cylinder (21) (13a) also forms fluid chamber (29), the top of upper bearing (24) closed cylinder (21), supporting driving shaft (13) and comprise each inlet hole rotatably, inlet hole is communicated with cylinder (21), valve assembly (60) is in each inlet hole, press the open some inlet holes of sense of rotation of live axle (13), the bottom of lower bearing (25) closed cylinder (21) and supporting driving shaft (13) rotatably, comprise several tap holes (27a that is communicated with cylinder (21), 27b), expulsion valve (27c, 27d) when fluid chamber (29) arrival certain pressure is above, open row (the 27a that portals, 27b), compressing roller (22) rotatably is located on the eccentric part (13a), inner peripheral surface along cylinder (21), roll, spacer (23) is positioned at each tap hole (27a, 27b) and be located on the cylinder (21), have elasticity and remain and contact, fluid chamber (29) is divided into two separate space with compressing roller (22).

36, rotary compressor according to claim 35 is characterized in that: each tap hole (27a, 27b) comprises first tap hole (27a), second tap hole (27b), and is as the criterion subtend row side with spacer (23).

37, rotary compressor according to claim 35, it is characterized in that: described expulsion valve (27c, 27d) also comprises discharges baffle plate (27e, 27f), discharging baffle plate (27e, 27f) can contact with expulsion valve (27c, 27d), the degree of opening of restriction expulsion valve (27c, 27d).

38, rotary compressor according to claim 35, it is characterized in that: described inlet hole comprises first inlet hole (41a), second inlet hole (41c) is formed, first inlet hole (41a) forms near spacer (23), second inlet hole (41c) is as the criterion with the center of cylinder (21), with first inlet hole (41a) by the several angle formation of staggering.

39, according to the described rotary compressor of claim 38, it is characterized in that: described valve assembly (60) comprises first valve (61), second valve (65) composition, first valve (61) rotatably is located between eccentric part (13a) and the upper bearing (24) and with eccentric part (13a) and contacts, press the sense of rotation rotation of live axle (13), second valve (65) is between cylinder (21) and upper bearing (24) and the rotatablely moving of lead first valve (61).

40, according to the described rotary compressor of claim 39, it is characterized in that: the external diameter of described first valve (61) is bigger than the internal diameter of cylinder (21).

41, according to the described rotary compressor of claim 39, it is characterized in that: described first valve comprises first opening portion (61b) and second opening portion (61c) composition, when live axle rotates by a certain direction, first opening portion (61b) is communicated with first inlet hole (41a), when live axle was pressed the other direction rotation, second opening portion (61c) was communicated with second inlet hole (41c).

42, according to the described rotary compressor of claim 41, it is characterized in that: described first opening portion (61b), second opening portion (61c) form near the outer peripheral surface of first valve (61).

43, according to the described rotary compressor of claim 39, it is characterized in that: described second valve (65) comprises assembly department (65b) and can built-in first valve (61).

44, according to the described rotary compressor of claim 39, it is characterized in that: described inlet hole also comprises second inlet hole (41c) and the 3rd inlet hole (41b) composition, the 3rd inlet hole (41b) is positioned on the spacer, when second inlet hole (41c) is open, open the 3rd inlet hole (41b) of first opening portion (61b) of first valve (61).

45, according to the described rotary compressor of claim 39, it is characterized in that: described valve assembly also comprises restricting means, controls the angle of swing of first valve (61), on each sense of rotation, can open corresponding inlet hole exactly.

46, according to the described rotary compressor of claim 45, it is characterized in that: described restricting means comprises protuberance (62) and groove (66) composition, protuberance (62) is given prominence to radial direction from first valve (61) and is formed, groove (66) is on second valve (65), with the built-in protuberance of movable manner (62).

47, rotary compressor according to claim 35 is characterized in that: described upper bearing comprises suction path (24d), sucks the suction pipe that path (24d) is communicated with inlet hole and is used to supply the preceding fluid of compression.

48, according to the described rotary compressor of claim 47, it is characterized in that: described compressor also comprises inflatable chamber (40), and inflatable chamber (40) directly is communicated with at suction path (24d), and has the broad space, stores by flowing into the fluid that path flows to.

49, according to the described rotary compressor of claim 48, it is characterized in that: described inflatable chamber (40) is being encircled the top segment space of upper bearing (24).

50, according to the described rotary compressor of claim 39, it is characterized in that: described compressor also comprises drain passageway (50), drain passageway (50) links with tap hole (27a, 27b), and the fluid that tap hole (27a, 27b) is discharged is also discharged to the upside water conservancy diversion.

51, according to the described rotary compressor of claim 50, it is characterized in that: described drain passageway (50) is a kind of pipeline, and an end of drain passageway (50) links tap hole (27a, 27b), and the other end is communicated with the upside space of upper bearing (24).

52, according to the described rotary compressor of claim 50, it is characterized in that: described drain passageway (50) comprises discharge conduit (55), baffler (30) is formed, discharge conduit (55) is communicated with the upper space of upper bearing (24), and baffler (30) is communicated with discharge conduit (55) and tap hole (27a, 27b).

53, according to the described rotary compressor of claim 52, it is characterized in that: described baffler (30) is located at the below of lower bearing (25), and the compressed fluid to tap hole (27a, 27b) is discharged expands, and reduces noise.

54, according to the described rotary compressor of claim 52, it is characterized in that: described discharge conduit (55) runs through lower bearing (25), cylinder (21), second valve (65) and upper bearing (24) back successively and forms, one end of discharge conduit (55) is communicated with baffler (30), and the other end is communicated with the upside space of upper bearing (24).

55, according to the described rotary compressor of claim 52, it is characterized in that: described discharge conduit (55) is formed by pipeline, and the one end is communicated with baffler (30), the upside spatial communication of the other end and upper bearing (24).

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