CN101542120A - Control valve for variable displacement compressor - Google Patents
Control valve for variable displacement compressor Download PDFInfo
- Publication number
- CN101542120A CN101542120A CNA2007800435567A CN200780043556A CN101542120A CN 101542120 A CN101542120 A CN 101542120A CN A2007800435567 A CNA2007800435567 A CN A2007800435567A CN 200780043556 A CN200780043556 A CN 200780043556A CN 101542120 A CN101542120 A CN 101542120A
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- Prior art keywords
- valve portion
- high pressure
- mentioned
- pressure valve
- variable displacement
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
- F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
- F04B27/14—Control
- F04B27/16—Control of pumps with stationary cylinders
- F04B27/18—Control of pumps with stationary cylinders by varying the relative positions of a swash plate and a cylinder block
- F04B27/1804—Controlled by crankcase pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
- F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
- F04B27/14—Control
- F04B27/16—Control of pumps with stationary cylinders
- F04B27/18—Control of pumps with stationary cylinders by varying the relative positions of a swash plate and a cylinder block
- F04B27/1804—Controlled by crankcase pressure
- F04B2027/1822—Valve-controlled fluid connection
- F04B2027/1827—Valve-controlled fluid connection between crankcase and discharge chamber
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
- F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
- F04B27/14—Control
- F04B27/16—Control of pumps with stationary cylinders
- F04B27/18—Control of pumps with stationary cylinders by varying the relative positions of a swash plate and a cylinder block
- F04B27/1804—Controlled by crankcase pressure
- F04B2027/1822—Valve-controlled fluid connection
- F04B2027/1831—Valve-controlled fluid connection between crankcase and suction chamber
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
- F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
- F04B27/14—Control
- F04B27/16—Control of pumps with stationary cylinders
- F04B27/18—Control of pumps with stationary cylinders by varying the relative positions of a swash plate and a cylinder block
- F04B27/1804—Controlled by crankcase pressure
- F04B2027/184—Valve controlling parameter
- F04B2027/1854—External parameters
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Air-Conditioning For Vehicles (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
The invention provides a control valve for variable displacement compressor. The control valve is adapted such that the closer to one end is a high-pressure-side valve body placed by a solenoid, the greater the degree of communication of a high-pressure valve section is and the less the discharge flow path-side pressure acting on the high-pressure-side valve body is. The control valve is also adapted such that the closer to the other end is a low-pressure-side valve body placed by the solenoid, the greater the degree of communication of a low-pressure valve section is, that the high-pressure-side valve body and low-pressure-side valve body are integrally placed on the one side by the solenoid, and that the high-pressure-side valve body and low-pressure-side valve body are separated when the low-pressure-side valve body is placed on the other side by the solenoid.
Description
Technical field
The present invention relates to a kind of control valve of variable displacement compressor.
Background technique
In the past, control valve as used variable displacement compressor such as the refrigeration cycle of Vehicular air conditioner etc., the control valve of known a kind of like this variable displacement compressor, it comprises the high pressure valve portion midway that is used for importing side communication path that the discharge stream of variable displacement compressor and pilot pressure chamber are communicated with that is located at, be used for midway the low pressure valve portion of suction passage with being located at the discharge side communication path of this pilot pressure chamber connection, by the connection aperture of high pressure valve portion and low pressure valve portion is carried out variable control, thereby the pressure that changes the pilot pressure chamber changes the angle of swash plate.
In this structure, adopt shell chamber (crankshaft room) as the pilot pressure chamber mostly, in this case, when increasing pilot pressure (pressure of pilot pressure chamber), then thereby the swash plate angle discharge capacity that diminishes reduces, when reducing pilot pressure, thereby then the swash plate angle becomes big discharge capacity increase (for example patent documentation 1).
But, in above-mentioned patent documentation 1 disclosed control valve, in ball valve as high pressure valve portion, because head pressure works along the direction of closing spool, therefore when reducing the swash plate angle and reduce the control of discharge capacity, might have no alternative but make high pressure valve portion because of the effect of this head pressure and close valve, pilot pressure descends and the increase of swash plate angle, thereby the discharge capacity increases.
In addition, except using ball valve as the above-mentioned high pressure valve portion, on guiding valve, formed the member of the spool of low pressure valve portion in addition as high pressure valve portion in the past, in this case, exist in the problem of start delay under the situation such as leaking, cause when beginning to freeze in the gap of sleeve in the high pressure valve portion and valve plunger.
Summary of the invention
Therefore, thus the objective of the invention is to obtain to suppress have no alternative but that high pressure valve portion is closed and make the swash plate angle become big and can also improve the control valve of the variable displacement compressor of startability because of the increase of head pressure.
Patent documentation 1: international open WO2004/065789 number
A kind of control valve of variable displacement compressor is provided in the present invention, and it comprises high pressure valve portion and low pressure valve portion; Above-mentioned high pressure valve portion is located at and is used for importing side communication path that discharge stream and pilot pressure chamber with variable displacement compressor be communicated with midway; Above-mentioned low pressure valve portion is located at and is used for discharge side communication path that suction passage and this pilot pressure chamber are communicated with midway, by the connection aperture of high pressure valve portion and low pressure valve portion is carried out variable control, thereby the pressure that changes the pilot pressure chamber changes the angle of swash plate, it is characterized in that, the control valve of this variable displacement compressor has and is used for positioning control parts that the advance and retreat position of the low voltage side spool of the high pressure side spool of above-mentioned high pressure valve portion and above-mentioned low pressure valve portion is controlled, the control valve of this variable displacement compressor constitutes and utilizes above-mentioned positioning control parts that above-mentioned high pressure side spool is disposed to side's side more, enlarge the connection aperture of high pressure valve portion more, and the pressure that acts on the discharge currents trackside on this high pressure side spool is weakened, the control valve of this variable displacement compressor constitutes and utilizes above-mentioned positioning control parts that above-mentioned low voltage side spool is disposed to the opposing party's side more, enlarge the connection aperture of low pressure valve portion more, the control valve of this variable displacement compressor constitutes and utilizes above-mentioned positioning control parts that above-mentioned high pressure side spool and above-mentioned low voltage side spool are configured in above-mentioned side's side integratedly, and when utilizing above-mentioned positioning control parts to make above-mentioned low voltage side spool be configured in above-mentioned the opposing party's side, above-mentioned high pressure side spool separates with the low voltage side spool.
In addition, in the present invention, can constitute when utilizing above-mentioned positioning control parts that high pressure side spool and low voltage side spool are configured in side's side, above-mentioned low pressure valve portion closes fully.
In addition, in the present invention, the control valve of this variable displacement compressor can constitute to have only to the force application part of the low voltage side spool in above-mentioned high pressure side spool and the low voltage side spool to the opposing party's side application of force.
Description of drawings
Fig. 1 is the skeleton diagram of the apparatus structure of the variable displacement compressor of one embodiment of the present invention and control valve.
Fig. 2 is the longitudinal section of control valve of the variable displacement compressor of embodiments of the present invention, is that expression high pressure valve portion closes and the figure of the state that low pressure valve portion opens.
Fig. 3 is the enlarged view of the A portion of Fig. 2.
Fig. 4 is the enlarged view of the B portion of Fig. 2.
Fig. 5 is the longitudinal section of control valve of the variable displacement compressor of embodiments of the present invention, is that expression high pressure valve portion opens and the figure of low pressure valve portion closing state.
Fig. 6 is the plotted curve of the dependency relation between the opening area of the position of the movable part in the control valve of variable displacement compressor of expression embodiments of the present invention and high pressure valve portion and low pressure valve portion.
Embodiment
Below, the mode of execution that present invention will be described in detail with reference to the accompanying.Fig. 1 is the skeleton diagram of the apparatus structure of the variable displacement compressor of present embodiment and control valve, Fig. 2 is the longitudinal section (sectional view that comprises central axis) of control valve, be that expression high pressure valve portion closes and the figure of the state that low pressure valve portion opens, Fig. 3 is the enlarged view of the A portion of Fig. 2, Fig. 4 is the enlarged view of the B portion of Fig. 2, Fig. 5 is the longitudinal section of control valve, be that expression high pressure valve portion opens and the figure of low pressure valve portion closing state, Fig. 6 is the plotted curve of the dependency relation between the opening area of the position of the movable part in the expression control valve and high pressure valve portion and low pressure valve portion.
As shown in Figure 1, the control valve 1 of present embodiment is used to control the pilot pressure Pc that changes the angle of inclination of swash plate 2a for the discharge capacity that changes variable displacement compressor 2, as an example, this control valve 1 is used to control pressure (pilot pressure) Pc as in the shell chamber 3 of pilot pressure chamber.At this moment, the pressure P c in the shell chamber 3 is low more, and it is big more and the discharge capacity is increased to act on pressure difference on the piston in the variable displacement compressor 2, and the high more discharge capacity of pressure in the opposite shell chamber 3 is few more.
Pilot pressure Pc generates as the intermediate pressure of pressure (suction pressure) Ps of pressure (head pressure) Pd that discharges the medium in the stream 4 (for example exhaust port) and the medium in the suction passage 5 (for example suction port).Therefore, control valve 1 comprises high pressure valve portion 7 and low pressure valve portion 9; Above-mentioned high pressure valve portion 7 is located at and is used for discharging the going up of importing side communication path 6 that stream 4 and shell chamber 3 be communicated with midway and the connection aperture of high pressure valve portion 7 is carried out variable control; Above-mentioned low pressure valve portion 9 be located at be used for discharge side communication path 8 that suction passage 5 and shell chamber 3 are communicated with the connection aperture of low pressure valve portion 9 is carried out variable control midway, by adjusting above-mentioned connection aperture, generate pilot pressure Pc.When adopting this structure, the connection aperture of high pressure valve portion 7 is big more, and pilot pressure Pc approaches head pressure Pd more and becomes high pressure, and the connection aperture of low pressure valve portion 9 is big more, and pilot pressure Pc approaches suction pressure Ps more and becomes low pressure.In addition, by control high pressure valve portion 7 and 9 both sides' of low pressure valve portion connection aperture, medium generation pilot pressure Pc when discharge stream 4 flows to suction passage 5 and reduces energy loss can suppressed as far as possible.
In addition, in the present embodiment, also the circulation path (comprise and import side communication path 6 and discharge side communication path 8) that is used to generate the medium of this pilot pressure Pc as the medium circulation path in the shell chamber 3, can be helped lubricated, the cooling of sliding parts.Therefore, face the opening 6a and the opening 8a that discharges side communication path 8 suitably configuration mutually of the importing side communication path 6 of shell chamber 3, and the medium path to low pressure valve portion 9 is also elongated to a certain extent from high pressure valve portion 7 with leaving.Thereby, the pressure P c2 of shell chamber 3 sides in a little higher than low pressure valve of the pressure P c1 portion 9 of shell chamber 3 sides in the high pressure valve portion 7.
As shown in Figure 2, control valve 1 comprises as the electromagnetic element 10 that is built-in with electromagnetic coil (solenoid) of positioning control parts and is built-in with high pressure valve portion 7 and the valve portion 11 of low pressure valve portion 9.
In valve portion 11, the spool (low voltage side spool 9a) of spool of high pressure valve portion 7 (high pressure side spool 7a) and low pressure valve portion 9 disposes and mutual butt along the advance and retreat direction file of the movable part 10a of electromagnetic coil, and helical spring 14,16 that is used as force application part etc. is pressed against movable part 10a, by changing the advance and retreat position of movable part 10a, can change the position of high pressure side spool 7a and low voltage side spool 9a, control high pressure valve portion 7 and 9 both sides' of low pressure valve portion connection aperture.In the present embodiment, low voltage side spool 9a is configured in a side near movable part 10a, high pressure side spool 7a is configured in a side away from movable part 10a.In addition, in the following description, for convenience, the direction indication of the arrow X among Fig. 2～Fig. 5 is called tip side, the opposite side of this direction indication is called terminal side.Movable part 10a, low voltage side spool 9a and high pressure side spool 7a all advance and retreat along directions X.This directions X along the movable part 10a of sleeve 12, valve plunger 13 and electromagnetic coil axially.
Tip side in valve portion 11 is formed with high pressure valve portion 7.At this, the concrete structure of this high pressure valve portion 7 is described with reference to Fig. 2 and Fig. 3.
Tip side at the penetration hole 12a of sleeve 12 is formed with the recess 12b that round-ended cylinder shape arranged of diameter greater than this penetration hole 12a, and the opening 12e side of this recess 12b is blocked by lid 12d.
On the other hand, on the tip portion of valve plunger 13, be formed with lifting head (poppet) 13a than the penetration hole 12a umbrella that direction is stretched out outside the radius vector a little.This lifting head 13a is housed in the recess 12b.In the state of Fig. 2 and Fig. 3, the mutual butt of bottom surface 12c of the bottom surface 13b of lifting head 13a and recess 12b.In the present embodiment, this lifting head 13a is equivalent to the high pressure side spool 7a of high pressure valve portion 7, and the bottom surface 12c of recess 12b is equivalent to its sealing surface (supporting surface).
At this, between lid 12d and lifting head 13a, clamp helical spring 14 as force application part, utilize this helical spring 14 to the directions X terminal side, be high pressure side spool 7a close the valve direction to the lifting head 13a application of force.
In addition, on sleeve 12, leave the cross-drilled hole mouth 12f that is formed with on the position of predetermined distance with this penetration hole 12a quadrature to the directions X terminal side at opening 12e from the tip side of penetration hole 12a, and in valve plunger 13, being formed with the small diameter part 13c of circular cross-section with constant, this small diameter part 13c forms from the position that the bottom surface of lifting head 13a 13b more carefully excavates in the face of cross-drilled hole mouth 12f.
And shell chamber 3 sides of not shown importing side communication path 6 are via being connected in the penetration hole 12a and the recess 12b that are formed on the lid 12d among Fig. 2, Fig. 3, and discharge stream 4 sides that import side communication path 6 are connected with cross-drilled hole mouth 12f.Thus, the pressure in the recess 12b, be that the back pressure of lifting head 13a is pilot pressure (Pc1), with pressure in the corresponding gap 12h of the small diameter part 13c of cross-drilled hole mouth 12f and valve plunger 13 be head pressure Pd.
At this, on the end face of the directions X tip side of the small diameter part 13c of valve plunger 13, head pressure Pd acts on this directions X tip side, and on the end face of the directions X terminal side of the small diameter part 13c of valve plunger 13, head pressure Pd acts on this directions X terminal side.Thereby, act on axially weakened (counteracting) of the head pressure Pd of valve plunger 13 along valve plunger 13.
Utilize said structure, move and make as the lifting head 13a of high pressure side spool 7a when the bottom surface 12c as supporting surface leaves to the directions X tip side at valve plunger 13, high pressure valve portion 7 forms the state of opening and makes and import side communication path 6 and be communicated with.The connection aperture of this high pressure valve portion 7 enlarges from the leaving distance of bottom surface 12c corresponding to lifting head 13a.On the other hand, the lifting head 13a state on the 12c of bottom surface in place is equivalent to high pressure valve portion 7 closing state to valve plunger 13 being positioned at terminal side on the directions X, under this state, imports side communication path 6 and is cut off.In this structure, bottom surface 12c is first-class to carry out break-in by lifting head 13a is pressed against, thereby can improve the sealing of high pressure valve portion 7.Then, the directions X position of lifting head 13a, be that the connection aperture of high pressure valve portion 7 is controlled by the electromagnetic element as the positioning control parts described later.
Terminal side in valve portion 11 is formed with low pressure valve portion 9.At this, the concrete structure of this low pressure valve portion 9 is described with reference to Fig. 2, Fig. 4 and Fig. 5.
On sleeve 12, on the position of separating predetermined distance from cross-drilled hole mouth 12f to the directions X terminal side, be formed with another cross-drilled hole mouth 12i with penetration hole 12a quadrature, and in valve plunger 13, being formed with the small diameter part 13d of circular cross-section with constant, the end that this small diameter part 13d more carefully excavates terminal side from the position of facing with this cross-drilled hole mouth 12i forms.
In addition, the cross-drilled hole mouth 12f that is present in the valve plunger 13 and the interval between the cross-drilled hole mouth 12i (the general 13e of portion) and the gap of penetration hole 12a are dwindled, thereby reduce the leakage of medium between cross-drilled hole mouth 12f, 12i.
In addition, on the position than the more close terminal side of penetration hole 12a of sleeve 12, be formed with the recess 12j that round-ended cylinder shape arranged of diameter greater than this penetration hole 12a.The tip side of the sidewall 12k of this recess 12j is pressed in the groove 10b of the tip side of being located at electromagnetic element 10, thereby valve portion 11 and electromagnetic element 10 are combined.
Then, in recess 12j, dispose lifting head 15 as low voltage side spool 9a.On this lifting head 15, be formed with recess 15a roughly cylindraceous, in this recess 15a, be inserted with the small diameter part 13d of valve plunger 13 loosely.
Be provided with the projection 15b of ring-type in the directions X tip side of this lifting head 15, as shown in Figure 5, be positioned at this lifting head 15 under the state of top side of directions X, projection 15b is in the opening 12m of the terminal side of penetration hole 12a is inserted into this penetration hole 12a, and end face 15c around the projection 15b and the bottom surface 12n butt of recess 12j.As mentioned above, in the present embodiment, this lifting head 15 is equivalent to the low voltage side spool 9a of low pressure valve portion 9, and the bottom surface 12n of recess 12j is equivalent to its sealing surface (supporting surface).
In addition, between bottom surface 12n and lifting head 15, clamp helical spring 16 as force application part, utilize this helical spring 16 to the directions X terminal side, be that the valve opening position of low voltage side spool 9a is to lifting head 15 application of forces.
Then, shell chamber 3 sides of not shown discharge side communication path 8 are connected with cross-drilled hole mouth 12i among Fig. 2, Fig. 4 and Fig. 5, and suction passage 5 sides of discharging side communication path 8 are via being connected in the penetration hole 12o and the recess 12j that are formed on the sidewall 12k.Thus, the pressure in the recess 12j, be that the back pressure of lifting head 15 is suction pressure Ps, the pressure of cross-drilled hole mouth 12i is pilot pressure (Pc2).
That is, in the present embodiment, move and make lifting head 15 as low voltage side spool 9a when the bottom surface 12n as supporting surface leaves to the directions X terminal side at valve plunger 13, low pressure valve portion 9 forms the state of opening and makes and discharge side communication path 8 and be communicated with.The connection aperture of this low pressure valve portion 9 and lifting head 15 enlarge accordingly from the distance of leaving of bottom surface 12n.On the other hand, lifting head 15 states on the 12n of bottom surface in place are equivalent to low pressure valve portion 9 closing state to valve plunger 13 being positioned at the top side on the directions X, under this state, discharge side communication path 8 and are cut off.In this structure, wait and carry out break-in by making lifting head 15 be pressed against bottom surface 12n, thereby can improve the sealing of low pressure valve portion 9.Then, the directions X position of lifting head 15, be that the connection aperture of low pressure valve portion 9 is controlled by the electromagnetic element as the positioning control parts described later.
The movable part 10a of electromagnetic element 10 is configured in the terminal side as the lifting head 15 of low voltage side spool 9a.
In the present embodiment, movable part 10a forms the 2nd member 10d that makes the 1st member 10c that is positioned at the directions X tip side and be positioned at terminal side along the directions X shape of be combined into integratedly side by side and mutually.On the 1st member 10c, be formed with tip side and be the mortar shape and expand and to open and terminal side forms recess 10e roughly cylindraceous, in this recess 10e, be inserted with lifting head 15 loosely.At this moment, the bottom surface 10f butt of the bottom surface 15d of lifting head 15 and recess 10e, this lifting head 15 is pressed against on the 1st member 10c by helical spring 16.Utilize gap between the outer wall of the inwall of recess 10e and lifting head 15 can absorb the axle deviation of lifting head 15 and movable part 10a.
On the tip portion of the 1st member 10c, be formed with lip part 10g.This lip part 10g fastening is in the peristome portion of recess 10i, thereby can limit movable part 10a to the moving of terminal side, and this recess 10i is formed on the tip side of the housing 10h of electromagnetic element 10.
At the back side of lip part 10g 10j and be formed on the helical spring 17 that clamps between the stepped part 10k on the sidewall of recess 10i as force application part, utilize this helical spring 17 to the directions X tip side to the movable part 10a application of force.
In addition, recess 10i is isolated by the tabular barrier film 18 of annulus.Under the state of guaranteeing to seal the peripheral portion of this barrier film 18 is being installed on the housing 10h, and under the state of guaranteeing to seal, is utilizing the central part of the 1st member 10c and the 2nd member 10d clamping barrier film 18.
At this, owing to recess 10i is connected with recess 12j via the path 10m of the positive and negative that runs through lip part 10g, the pressure that therefore acts on the tip side one side (surface) that in this recess 10i, promptly acts on barrier film 18 is suction pressure Ps.On the other hand, utilize the seal action of barrier film 18, making the pressure on the terminal side one side (back side) that acts on this barrier film 18 is barometric pressure.Thereby, during greater than specified value, utilize the pressure reduction that acts on barrier film 18 that movable part 10a is moved to terminal side at suction pressure Ps.
In addition, axle 19 combines with movable part 10a, utilization be configured in terminal side as the helical spring 20 of force application part to tip side to these axle 19 application of forces.
Utilize said structure, when giving coil 21 energisings, attraction force to the oriented terminal side of movable part 10a (the 2nd member 10d) effect, but adjust attraction force by control to the electric current of coil 21, can utilize this attraction force and determine movable part 10a as the effect equilibrium of forces of the helical spring 14,16,17,20 of force application part, and the lifting head 15 as low voltage side spool 9a of the butt of this movable part 10a, be located at the position on the valve plunger 13 with this lifting head 15 butts as the directions X of the lifting head 13a of high pressure side spool 7a.
At this, act on the rising of the suction pressure Ps on the barrier film 18 and make movable part 10a when terminal side moves in energising or the utilization controlled to coil 21, utilization also moves the lifting head 15 as low voltage side spool 9a as the effect of the helical spring 16 of force application part to terminal side with movable part 10a interlock, and utilization also moves the lifting head 13a as high pressure side spool 7a that is located on the valve plunger 13 as the effect of the helical spring 14 of force application part to terminal side with movable part 10a interlock.
Wherein, in the present embodiment,, the valve plunger 13 that is provided with lifting head 13a forms the energy separated structures because not combining with lifting head 15, therefore as shown in Figure 2, as the lifting head 13a of high pressure side spool 7a in place on as the bottom surface 12c of supporting surface after, lifting head 15 separates and only enlarges the connection aperture of low pressure valve portion 9 from valve plunger 13.
Fig. 6 is that expression has high pressure valve portion 7 in the control valve 1 of said structure and the low pressure valve portion 9 connection aperture with respect to the position of the directions X of movable part 10a.In this Fig. 6, transverse axis is represented the position of the directions X of movable part 10a, and the right side is a terminal side, and the left side is a tip side.In addition, the longitudinal axis is to be communicated with aperture (opening area).
The connection aperture of high pressure valve portion 7 and the position of movable part 10a are that the position of lifting head 13a is carried out linear change accordingly.Promptly, be positioned at movable part 10a under the state (Fig. 5) of top side, the connection aperture of high pressure valve portion 7 is maximum, along with the position of movable part 10a changes and the connection aperture of high pressure valve portion 7 is and reduces linearly to terminal side, be connected to moment at lifting head 13a as the bottom surface 12c of supporting surface as high pressure side spool 7a, high pressure valve portion 7 closes, and it is communicated with aperture is 0.In addition, when closing, stop via importing side communication path 6 feeding medium to shell chamber 3 in, but utilization just can be guaranteed feeding medium in shell chamber 3 from the leakage in the gap between piston-cylinder-etc. in high pressure valve portion 7.
The connection aperture of low pressure valve portion 9 also changes with the position of movable part 10a is corresponding, but according to the position of movable part 10a, the variation pattern difference of the connection aperture of low pressure valve portion 9.That is, at first, be positioned at movable part 10a under the state of top side, be connected to as the bottom surface 12n of supporting surface and low pressure valve portion 9 closes as the lifting head 15 of low voltage side spool 9a.
When terminal side changed, lifting head 15 left from bottom surface 12n in the position of movable part 10a.Lifting head 15 fully from bottom surface 12n leave during, be communicated with aperture and be linear change (zone 1).Afterwards, even increase in the distance of leaving of lifting head 15 from bottom surface 12n, but projection 15b also be inserted in the penetration hole 12a during in, the gap of projection 15b and penetration hole 12a is controllable, the connection aperture of low pressure valve portion 9 forms the fixedly state of aperture that is equivalent to.Thus, in this interval, the variation that is communicated with aperture is constant (zone 2) basically.Afterwards, at projection 15b when penetration hole 12a deviates from, the connection aperture of low pressure valve portion 9 and lifting head 15 from bottom surface 12n to leave distance corresponding and increase (zone 3) linearly.Then, in this zone 3, as mentioned above, lifting head 15 is low voltage side spool 9a from having lifting head 13a is that the valve plunger 13 of high pressure side spool 7a separates and leaves this valve plunger 13 (clearance G), although therefore high pressure valve portion 7 closes and high pressure side spool 7a is restricted to the mobile of terminal side, also can enlarge the connection aperture of low pressure valve portion 9 rapidly.
As mentioned above, adopt present embodiment, make to act on to act on that the directions X terminal side of valve plunger 13 and these both sides of tip side go up and weakened the situation of the pressure decline that high pressure valve portion is closed make in the shell chamber in the time of therefore can suppressing as in the past to be in the state of opening, because of the pressure P d of the discharge currents trackside that acts on the high pressure side spool in high pressure valve portion as the head pressure Pd on the lifting head 13a of high pressure side spool 7a.Thereby under the less state of the angle of the swash plate 2a of variable displacement compressor 2, the connection aperture that can suppress high pressure valve portion 7 is dwindled or is closed and make that pressure in the shell chamber 3 descend, the angle of swash plate 2a becomes big.
That is, adopt present embodiment, obtain the state of the capacity of almost not discharging owing to can keep the angle of swash plate 2a lessly more reliably, therefore preferably be applicable in the variable displacement compressor that so-called no-clutch system uses.In this case, compare, have and to reduce part number of packages, simplification device structure, reduce these advantages of weight with the system that uses clutch that compressor is shut down.
And, adopt present embodiment, when utilizing electromagnetic element 10 as the positioning control parts to be configured in terminal side as the lifting head 15 of low voltage side spool 9a, separate with lifting head 15 as the lifting head 13a of high pressure side spool 7a, therefore can make lifting head 15 not enlarge the connection aperture of low pressure valve portion 9 with being restricted because of lifting head 13a as low voltage side spool 9a.Thereby, when starting variable displacement compressor 2, can more promptly enlarge the connection aperture of low pressure valve portion 9 and reduce pilot pressure Pc in the shell chamber 3, thereby and the angle that increases swash plate 2a more promptly guarantee the discharge capacity that needs.
And, be separable structure owing to adopted high pressure side spool 7a and low voltage side spool 9a, even therefore head pressure Pd acts on high pressure side spool 7a towards the directions X tip side, can not constitute obstacle to the action of directions X terminal side to low voltage side spool 9a yet.
In addition, adopt present embodiment, when utilizing electromagnetic element 10 as the positioning control parts to make to be configured in tip side as the lifting head 13a of high pressure side spool 7a and as the lifting head 15 of low voltage side spool 9a, low pressure valve portion 9 closes fully, therefore be easy to the pilot pressure Pc of shell chamber 3 is held in high pressure conditions, and can reduce the leakage flow of low pressure valve portion 9, thereby can reduce energy loss.
In addition, formed the structure that low pressure valve portion 9 closes, therefore compare with the structure of not closing, connection aperture under the closed condition of low pressure valve portion 9 diminishes certainly, adopt present embodiment, formed high pressure side spool 7a and low voltage side spool 9a is a separated structures, therefore compare with the situation that both are integrally formed, can more promptly enlarge the connection aperture of low pressure valve portion 9, thereby can more promptly carry out from low pressure valve portion 9 closing state, it is the state that the higher state of pilot pressure Pc of shell chamber 3 is opened to low pressure valve portion 9, be the switching of the lower state of the pilot pressure Pc of shell chamber 3, improve control response.
And, adopt present embodiment, utilize and only can more promptly not separate lifting head 13a and lifting head 15 to the helical spring 17 of the terminal side application of force, therefore can more promptly enlarge the connection aperture of low pressure valve portion 9, thereby can improve control response lifting head 15 to the lifting head 13a application of force.
More than, preferred implementation of the present invention has been described, but the present invention is not limited to above-mentioned mode of execution, can carry out various distortion.For example, also poppet valve can be changed to ball valve, needle-valve.And the direction of the attraction force of electromagnetic element, the structure that produces attraction force, the structure of each valve portion, the structure of force application part etc. also are not limited to above-mentioned mode of execution.
Industrial applicibility
The present invention can be as the control valve of variable displacement compressor.
Claims (3)
1. the control valve of a variable displacement compressor, it comprises high pressure valve portion and low pressure valve portion; Above-mentioned high pressure valve portion is located at and is used for importing side communication path that discharge stream and pilot pressure chamber with variable displacement compressor be communicated with midway; Above-mentioned low pressure valve portion is located at and is used for discharge side communication path that suction passage and this pilot pressure chamber are communicated with midway, by the connection aperture of high pressure valve portion and low pressure valve portion is carried out variable control, thereby the pressure that changes the pilot pressure chamber changes the angle of swash plate, it is characterized in that
The control valve of this variable displacement compressor has and is used for positioning control parts that the advance and retreat position of the low voltage side spool of the high pressure side spool of above-mentioned high pressure valve portion and above-mentioned low pressure valve portion is controlled;
The control valve of this variable displacement compressor constitute utilize above-mentioned positioning control parts with above-mentioned high pressure side spool more to side's side configuration, enlarge the connection aperture of high pressure valve portion more, and it is weakened to act on the pressure of discharge currents trackside of this high pressure side spool;
The control valve of this variable displacement compressor constitutes and utilizes above-mentioned positioning control parts that above-mentioned low voltage side spool is disposed to the opposing party's side more, enlarges the connection aperture of low pressure valve portion more;
The control valve of this variable displacement compressor constitutes and utilizes above-mentioned positioning control parts that above-mentioned high pressure side spool and above-mentioned low voltage side spool are configured in above-mentioned side's side integratedly, and above-mentioned high pressure side spool separates with the low voltage side spool when utilizing above-mentioned positioning control parts that above-mentioned low voltage side spool is configured in above-mentioned the opposing party's side.
2. the control valve of variable displacement compressor according to claim 1 is characterized in that,
When utilizing above-mentioned positioning control parts that high pressure side spool and low voltage side spool are configured in side's side, above-mentioned low pressure valve portion closes fully.
3. the control valve of variable displacement compressor according to claim 1 is characterized in that,
The control valve of this variable displacement compressor has only to the force application part of the low voltage side spool in above-mentioned high pressure side spool and the low voltage side spool to the opposing party's side application of force.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP323428/2006 | 2006-11-30 | ||
| JP2006323428A JP4925800B2 (en) | 2006-11-30 | 2006-11-30 | Control valve for variable displacement compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101542120A true CN101542120A (en) | 2009-09-23 |
Family
ID=39467921
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007800435567A Pending CN101542120A (en) | 2006-11-30 | 2007-11-29 | Control valve for variable displacement compressor |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20100068074A1 (en) |
| EP (1) | EP2090779A1 (en) |
| JP (1) | JP4925800B2 (en) |
| CN (1) | CN101542120A (en) |
| WO (1) | WO2008066134A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103547804A (en) * | 2011-05-23 | 2014-01-29 | 学校法人斗源学院 | Control valve for a variable capacity compressor and method for manufacturing same |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101900107A (en) * | 2010-07-05 | 2010-12-01 | 浙江新劲空调设备有限公司 | External control valve of variable displacement compressor |
| JP6216950B2 (en) * | 2012-12-11 | 2017-10-25 | 株式会社テージーケー | Control valve and control valve for variable capacity compressor |
| JP6149239B2 (en) | 2013-06-28 | 2017-06-21 | 株式会社テージーケー | Control valve for variable capacity compressor |
| JP6149206B2 (en) | 2013-07-04 | 2017-06-21 | 株式会社テージーケー | Control valve for variable capacity compressor |
| JP6714274B2 (en) * | 2016-06-13 | 2020-06-24 | 株式会社テージーケー | Control valve for variable capacity compressor |
| WO2018180784A1 (en) * | 2017-03-28 | 2018-10-04 | イーグル工業株式会社 | Capacity control valve |
| JP7068320B2 (en) | 2017-08-28 | 2022-05-16 | イーグル工業株式会社 | solenoid valve |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3911937B2 (en) * | 1999-08-04 | 2007-05-09 | 株式会社豊田自動織機 | Control method for air conditioner and variable capacity compressor |
| JP2001073939A (en) * | 1999-08-31 | 2001-03-21 | Toyota Autom Loom Works Ltd | Control valve for variable displacement compressor and variable displacement compressor |
| JP4130566B2 (en) * | 2002-09-25 | 2008-08-06 | 株式会社テージーケー | Capacity control valve for variable capacity compressor |
| JP4547332B2 (en) | 2003-01-22 | 2010-09-22 | 株式会社ヴァレオサーマルシステムズ | Control valve for variable capacity compressor |
| JP4456906B2 (en) * | 2004-03-25 | 2010-04-28 | 株式会社不二工機 | Control valve for variable capacity compressor |
| JP2005282414A (en) * | 2004-03-29 | 2005-10-13 | Zexel Valeo Climate Control Corp | Control valve |
| JP4331653B2 (en) * | 2004-05-31 | 2009-09-16 | 株式会社テージーケー | Control valve for variable capacity compressor |
| JP2006307828A (en) * | 2005-03-31 | 2006-11-09 | Tgk Co Ltd | Control valve for variable displacement compressor |
| JP4521484B2 (en) * | 2005-05-19 | 2010-08-11 | 株式会社テージーケー | Control valve for variable capacity compressor |
-
2006
- 2006-11-30 JP JP2006323428A patent/JP4925800B2/en not_active Expired - Fee Related
-
2007
- 2007-11-29 EP EP07832804A patent/EP2090779A1/en not_active Withdrawn
- 2007-11-29 WO PCT/JP2007/073104 patent/WO2008066134A1/en active Application Filing
- 2007-11-29 CN CNA2007800435567A patent/CN101542120A/en active Pending
- 2007-11-29 US US12/516,621 patent/US20100068074A1/en not_active Abandoned
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103547804A (en) * | 2011-05-23 | 2014-01-29 | 学校法人斗源学院 | Control valve for a variable capacity compressor and method for manufacturing same |
| CN103547804B (en) * | 2011-05-23 | 2016-03-09 | 学校法人斗源学院 | Control valve for variable displacement compressor and the method for the manufacture of this control valve |
Also Published As
| Publication number | Publication date |
|---|---|
| US20100068074A1 (en) | 2010-03-18 |
| EP2090779A1 (en) | 2009-08-19 |
| JP2008138540A (en) | 2008-06-19 |
| WO2008066134A1 (en) | 2008-06-05 |
| JP4925800B2 (en) | 2012-05-09 |
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Open date: 20090923 |