CN1441164A - Compressor control valve and its producing method - Google Patents

Compressor control valve and its producing method Download PDF

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Publication number
CN1441164A
CN1441164A CN02124429A CN02124429A CN1441164A CN 1441164 A CN1441164 A CN 1441164A CN 02124429 A CN02124429 A CN 02124429A CN 02124429 A CN02124429 A CN 02124429A CN 1441164 A CN1441164 A CN 1441164A
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CN
China
Prior art keywords
pressure
control valve
casing
film
flange
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Granted
Application number
CN02124429A
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Chinese (zh)
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CN100396924C (en
Inventor
冈田悟
坂井孝行
市川贵昭
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Pacific Industrial Co Ltd
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Pacific Industrial Co Ltd
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Publication date
Priority claimed from JP2002052488A external-priority patent/JP2002327683A/en
Application filed by Pacific Industrial Co Ltd filed Critical Pacific Industrial Co Ltd
Publication of CN1441164A publication Critical patent/CN1441164A/en
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Publication of CN100396924C publication Critical patent/CN100396924C/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/0603—Multiple-way valves
    • F16K31/061—Sliding valves
    • F16K31/0613—Sliding valves with cylindrical slides
    • 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
    • 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
    • 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
    • F04B2027/1809—Controlled pressure
    • F04B2027/1813—Crankcase pressure
    • 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
    • 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
    • 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
    • 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
    • F04B2027/1859—Suction pressure

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

Abstract

A highly precise and relatively inexpensive control valve for a compressor. The control valve has a pressure sensitive part including a metal diaphragm to be processed relatively inexpensively. The diaphragm is head between flanges, and the pressure sensitive part is attached to a control valve part after the pressure leakage is checked. The control valve part has an engagement pawl and a position determining face. The flanges are brought into contact with the position determining face and fixed with the engagement nail. The position determining face is formed so that the distance from the diaphragm to the top surface of a valve chamber is a prescribed value.

Description

The control valve of compressor and manufacture method thereof
Background of invention
The present invention relates to a kind of control valve that is used for control example as the discharge capacity of the compressor with variable displacement that is used in car air conditioner, and relate more particularly to detect the improvement of the pressure sensing part of compressor suction pressure.
Publication number is that the Japanese publication of 9-268973 has disclosed a kind of existing control valve 1 that is used for compressor with variable displacement.Control valve 1 is positioned at the refrigerant gas passage, and this refrigerant gas passage is connected in the discharge pressure district crankshaft cavity of compressor.Control valve 1 is regulated the interior pressure of crankshaft cavity to change the discharge capacity of compressor.With reference to Fig. 8, control valve 1 comprises a body 21 that puts valve body 23, and a pressure sensing part 10 that is connected in body 21.Pressure sensing part 10 comprises a casing 13 and a pressure sensing component that is received within the casing 13, or a metal bellows 11.Bellows 11 is welded on upper frame plate 15a respect to one another and the lower bearing bracket plate 15b.A pressure sensing chamber is formed in the bellows 11.Bellows 11 is according to the suction pressure P of compressor sMove and detect suction pressure P sLower bearing bracket plate 15b is connected with a drive link 22.The motion that lower bearing bracket plate 15b and drive link 22 transmit bellows 11 to valve body 23.
A regulator 18 is installed on the upper opening of casing 13.Regulator 18 is adjusted the Driving force of bellows 11.More particularly, the spacing between upper frame plate 15a and the lower bearing bracket plate 15b, perhaps the longitudinal size of bellows 11 is according to the change in location of regulator 18.The attribute (valve opening pressure) of the variable effect control valve 1 of the longitudinal size of bellows 11 or load on spring.Existing control valve 1 is adjusted the attribute of control valve 1 by the position of regulating regulator 18.
Because the processing cost of bellows 11 is higher, the bellows 11 feasible manufacture costs that are difficult to reduce control valve 1.
For control valve 1 can stably be moved, the Pressure testing chamber preferably remains vacuum basically.Yet because bellows 11 is welded on upper frame plate 15a and the lower bearing bracket plate 15b, by the volatile substance that welding produces, for example solder flux may enter the Pressure testing chamber.This has reduced the degree of vacuum in Pressure testing chamber.In addition, the bubble or the cavity that are formed in the weld seam can cause slow leakage, have changed the degree of vacuum in Pressure testing chamber like this.If the degree of vacuum in Pressure testing chamber changes, the accuracy of control valve 1 reduces.Replace welding, can utilize laser (lazar) that bellows 11 is connected on upper frame plate 15a and the lower bearing bracket plate 15b.But, because the cost of laser solder flux equipment is higher, thereby increased the manufacture cost of control valve 1, and this is problematic.
Summary of the invention
An object of the present invention is to provide a kind of pinpoint accuracy and relatively cheap control valve.
To achieve these goals, one embodiment of the present of invention provide a kind of control valve of compressor with variable displacement, and it comprises a suction passage, and refrigerant gas flows therein with lower pressure; A discharge pressure district, compressed refrigerant flows therein with higher pressure; A crankshaft cavity that puts a cam; And a supply passage, it is connected the discharge pressure district with crankshaft cavity.This control valve comprises a body, and it puts a valve body, and this valve body opens or closes the valve opening that is connected in supply passage; And a pressure sensing part, it is fixed on the pressure that is used on the body detect in the suction passage.Pressure sensing partly comprises a film, and the pressure that this film is relevant in the suction passage moves; One first casing, it has one first flange and film to determine a Pressure testing chamber together; And one second casing, it has one second flange and first flange fixed film together.
Another embodiment provides a kind of control valve of compressor with variable displacement, and it comprises a suction passage, and refrigerant gas flows therein with lower pressure; A discharge pressure district, compressed refrigerant flows therein with higher pressure; A crankshaft cavity that puts a cam; And a supply passage, it is connected the discharge pressure district with crankshaft cavity.This control valve comprises that a pressure sensing partly is used to detect the pressure in the suction passage.Pressure sensing partly comprises a film, and the pressure that this film is relevant in the suction passage moves; One first casing, it has one first flange and film to determine a Pressure testing chamber together; And one second casing, it has one second flange and first flange fixed film together.This control valve also comprises a body, and it puts a valve body, and this valve body is used to open or close the valve opening that is connected in supply passage; And a positioning surface, it is formed at, and to be used for by contacting second casing on the body be film location.
An alternative embodiment of the invention provides a kind of method of making the control valve of compressor with variable displacement.This control valve comprises a body, and it puts a valve body, and this valve body changes the opening size of valve opening; And a pressure sensing part, it is connected the pressure that is used on the body detect in the compressor.This method may further comprise the steps: the position corresponding to a predetermined spacing of distance valve opening on body forms a positioning surface; In first casing with one first flange, place the frame plate of a pressure sensing spring and a pair of clamp pressure sensing spring opposite ends; In second casing with one second flange, place a link; Fix first casing and second casing by film of clamping between first flange and second flange; Pressure in the Pressure testing chamber that will be determined by film and first casing is set at a predetermined value; And pressure sensing partly is connected on the body by the positioning surface that makes second casing can contact body.
To know other aspects of the present invention and advantage in conjunction with the accompanying drawing that principle of the present invention is shown with way of example by following explanation.
Description of drawings
Following explanation and accompanying drawing by the reference preferred embodiment of the present invention can be understood the present invention and purpose and advantage well, in the accompanying drawing:
Fig. 1 is the cross-sectional view of the control valve of first embodiment of the invention;
Fig. 2 is the cross-sectional view of a part of the control valve of second embodiment of the invention;
Fig. 3 is the cross-sectional view of the control valve of third embodiment of the invention;
Fig. 4 is the cross-sectional view of the control valve of fourth embodiment of the invention;
Fig. 5 is the cross-sectional view of the control valve of fifth embodiment of the invention;
Fig. 6 is the cross-sectional view of the control valve of sixth embodiment of the invention;
Fig. 7 is the cross-sectional view with compressor with variable displacement of control valve shown in Figure 1; And
Fig. 8 is the cross-sectional view of existing control valve.
Embodiment
The control valve 1a of the first embodiment of the present invention is described now with reference to accompanying drawing.
With reference to Fig. 7, control valve 1a is connected on the rear case 210 of compressor with variable displacement 200.Compressor 200 be placed in the refrigerant circuit 400 compressor 200 compression refrigerant gas and from discharge chamber 212a, 212b to refrigerant circuit 400 supply compressed refrigerant.After compressed refrigerant expanded in refrigerating circuit 400, refrigerant gas was recycled to a suction passage 215 that is formed in the rear case 210.Like this, refrigerant gas flows in suction passage 215 with lower pressure.
A crankshaft cavity 231 of compressor 200 puts a transmission shaft 250 that is rotated by belt pulley 201, a rotation that is fixed on the transmission shaft 250 supports 251, and a cam disk, or wobbler 240, this wobbler 240 be supported can endwisely slipping and tilt along transmission shaft 250.The guide pin 241 of support arm 252 supported swashplates 240 of rotation support 251.Wobbler 240 is connected in a piston 260 by a pair of slide block 242.Piston 260 to-and-fro motion in cylinder thorax 221 when wobbler 240 rotates.
The stroke of piston 260 is according to the angle change of wobbler 240.The angle of inclination of wobbler 240 is relevant to pressure (the crankshaft cavity pressure P in the crankshaft cavity 231 c) change.Flashboard body 270 is pushed to wobbler 240 and puts in the dimple 222 at one according to the angle of inclination of wobbler 240 and moves.
Suction chamber 211a, 211b and discharge chamber 212a, 212b are formed in the rear case 210.When piston 260 moved, refrigerant gas flowed to cylinder thorax 221 from suction chamber 211a, 211b by a suction port 213.Be discharged into discharge chamber 212a, 212b by piston 260 refrigerant compressed gases via a floss hole 214.That is to say that discharge chamber 212a, 212b form a discharge pressure district, refrigerant gas is therein with higher pressure (discharge pressure P d) flow.
Suction passage 215 is connected in and puts dimple 222 and be connected in suction chamber 211b by a through hole 216.When wobbler 240 with flashboard body 270 when rear case 210 moves, flashboard body 270 is closed through hole 216.Discharge chamber 212b and crankshaft cavity 231 interconnect by supply passage 218,219.Control valve 1a changes the openings of sizes of supply passage 218,219.
Below with reference to Fig. 1 control valve 1a is described.
Control valve 1a comprises 110, one control valve parts 120 of a pressure sensing part, and an electromagnet part 130.
Pressure sensing part 110 has 113 and one of a upper casing (first casing) that have a upper flange 113b to have the lower housing (second casing) 112 of a lower flange 112b.A pressure sensing component, or film 111 is clamped between lower flange 112b and the upper flange 113b.Film 111 and upper casing 113 have been determined a Pressure testing chamber 119.Pressure testing chamber 119 remains a predetermined reference pressure (preferably, being essentially vacuum).A frame plate 115b is positioned on the film 111.A split holder 115a comprises a hollow cylinder body portion 115c, and it extends axially along split holder 115a's.Pressure sensing spring 116 by frame plate 115b and split holder 115a clamping is pushed frame plate 115b to film 111.Upper casing 113 comprises an apical pore 113a or pressure setting hole.A seal 114 seals apical pore 113a.Preferably apical pore 113a is circular and seal 114 is spherical.
A link, or pressure sensing axle 117 is received within lower housing 112 interior downsides with contact membrane 111.Lower housing 112 comprises a connection boss 112c, and it is received within the connection dimple 121b of body 121.A suction pressure introduction hole 112a is formed in the lower housing 112.In the time of in control valve 1a is installed in compressor 200, pressure sensing part 110 exposes to the suction passage 215 of compressor 200.Like this, suction pressure P sAct on the chamber 119a who is positioned at below the film 111 by suction pressure introduction hole 112a.As suction pressure P sWhen higher, film 111 moves up against the thrust of pressure sensing spring 116.On the contrary, as suction pressure P sWhen low, film 111 moves down under the thrust of pressure sensing spring 116 and pressure difference effect.That is to say that film 111 is according to suction pressure P sAnd be out of shape.
The assembly technology of pressure sensing part 110 will be described now.At first, split holder 115a, pressure sensing spring 116 and frame plate 115b are assembled together and are placed in the upper casing 113.Then pressure sensing axle 117 is received within the lower housing 112.Film 111 is clamped between upper flange 113b and the lower flange 112b.At this moment, upper casing 113 and lower housing 112 are combined.Preferably, by utilizing for example plasma welding, laser bonding or beam welding that the outer periphery of casing 112,113 is sealed and casing 112,113 is interconnected.
Subsequently, pressure sensing part 110 is placed in the environment of predetermined reference pressure.For example, pressure sensing part 110 is placed in the pressure transducer of reference pressure.Make pressure and the pressure in the pressure chamber in the Pressure testing chamber 119 steadily balanced by apical pore 113a and hollow body 115c like this.This is set at reference pressure with the pressure in the Pressure testing chamber 119.At this moment, seal 114 is closed apical pore 113a.By seal 114 being welded on sealing load test chamber 119 on the upper casing 113.After the assembling, make pressure sensing part 110 withstanding pressures reveal test.
That is to say that in first embodiment, the test of the pressure leakages of pressure sensing part 110 was carried out before assembling control valve 1a.In addition, the basic vacuum although preferably reduce pressure in Pressure testing chamber 119 also can be with the gas charged pressure test chamber 119 under the refrigerant pressure.Also have, pressure sensing part 110 can be assembled in reduced pressure atmosphere.
Now control valve part 120 will be described.
A valve opening 125 and a valve chamber 127 are formed in the body 121 of control valve part 120.Valve chamber 127 puts a valve body 123.Valve body 123 comprises a top 125b opposing end faces 123a with valve chamber 127.Body 121 comprises a discharge pressure introducing port 127a, and it is perpendicular to the axis of body 121 and be connected in valve chamber 127.With reference to Fig. 7, discharge pressure introducing port 127a is connected in the discharge chamber 212b of compressor 200 by supply passage 218.Like this via discharge pressure introducing port 127a with discharge pressure P dImport valve chamber 127.Body 121 comprises a bent axle pressure introducing port 125a, and it is connected in valve opening 125.Bent axle pressure introducing port 125a is connected in the crankshaft cavity 231 of compressor 200 by supply passage 219.
Valve body 123 is connected in pressure sensing axle 117 by a feeling of stress measuring staff 122.Feeling of stress measuring staff 122 slides in a pilot hole 121a.Feeling of stress measuring staff 122 has a upper boom part 122a, and latter's diameter is substantially equal to the internal diameter of pilot hole 121a, and a lower beam part 122b, and it is formed between upper boom part 122a and the valve body 123.Lower beam part 122b allows refrigerant gas to flow in valve opening 125.
Body 121 comprises connection dimple 121b, and it puts the connection boss 112c of pressure sensing part 110; A positioning surface 120b, it supports the flange of lower housing 112; And a counterpart 120a, its fixation pressure transducing part 110.Positioning surface 120b moulding must make the spacing C between the top 125b of film 111 and valve chamber 127 become a predetermined value.Counterpart 120a has strengthened the combination between pressure sensing part 110 and the control valve part 120.Flange at upper casing 113 contacts under the situation of positioning surface 120b, and counterpart 120a engages with the flange of upper casing 113.At this moment, preferably connecting the lower end of boss 112c and the bottom that is connected dimple 121b of control valve part 120 separates.
It below is explanation to positioning surface 120b.The deformation extent of film 111 is relevant with the valve opening pressure of control valve 1a.In addition, the reaction force of film 111 changes with curve form with respect to the deformation extent of film 111, rather than form of straight lines.Must accurately calibrate the initial deformation degree of film 111 like this.In first embodiment, thereby select the spacing between top 125b and the positioning surface 120b when pressure sensing part 110 is connected in control valve part 120, to make film 111 be positioned at a preposition.
The following describes electromagnet part 130.
The electromagnet part 130 that is connected in body 121 comprises a plunger bushing 136 with a lower openings; An iron core movably, or plunger 134; A regulator 137 that is fixed on the plunger bushing 136; And a secured core, or attracting part 132, it is fixed on the upper opening of plunger bushing 136.Plunger bushing 136, regulator 137, and attract part 132 to determine an electromagnet chamber 139.A cylindrical coil 131 is around attracting part 132 and plunger 134 to be provided with.Coil 131 is connected in actuator 184, and the instruction of its response controller 183 provides field current to coil 131.
An electromagnet bar guiding element 132b is formed on and attracts in the part 132, and this electromagnet guide rod is connected in valve chamber 127 with electromagnet chamber 139.An electromagnetism iron 133 and valve body 123 global formations also move axially in electromagnet bar guiding element 132b.The thrust of an electromagnet spring 135 makes the lower end of electromagnetism iron 133 can be close to plunger 134.Therefore, plunger 134, electromagnetism iron 133 and valve body 123 whole moving.
A connectivity slot 132a is formed on a side that attracts part 132.In the time of in control valve 1a is installed in compressor 200, a gap 28 that is connected in bent axle pressure introducing port 125a is formed on (see figure 7) between body 121 and the compressor 200.Electromagnet chamber 139 is connected in bent axle pressure introducing port 125a by the connectivity slot 132a that attracts part 132, an intercommunicating pore 126 and a gap 28 that is formed in the body 121.Pressure in the electromagnet chamber 139 equals the pressure in the valve opening 125.Plunger 134 comprises a plunger hole 134a who is connected in a chamber.This allows refrigerant gas to flow between the lower space of the upper space of plunger 134 and plunger 134.
Plunger 134 moves in plunger bushing 136.Chamber is formed on the bottom of plunger 134.The electromagnet spring 135 that upwards promotes plunger 134 is between the chamber and regulator 137 of plunger 134.The thrust of regulator 137 regulating magnet springs 135 (compression degree of electromagnet spring 135).
The below adjusting of explanation electromagnet spring 135.
At first, control valve 1a is placed in the environment of predetermined reference pressure.For example, control valve 1a is placed in the pressure chamber of decompression.An instrument (not shown) that is used for movement governor 137 is inserted in the adjustment hole 138 of plunger bushing 136.When testing suction pressure P sWith test discharge pressure P dWhen putting on suction pressure introduction hole 112a and discharge pressure introducing port 127a respectively, measure the pressure in the bent axle pressure introducing port 125a.Thereby the position of regulating regulator 137 by this instrument makes measured value become predetermined value.Fill up plunger bushing 136 then so that regulator 137 is fixed on adjusted position.After instrument takes away from adjustment hole 138, by seal 137b being welded on the plunger bushing 136 with adjustment hole 138 sealings.The thrust of regulating magnet spring 135 can be set the characteristic of control valve 1a as described.
Next the operation of control valve 1a is described.
When air-conditioning switch 180 was opened and surpassed the target temperature of being set by a temperature selector 182 by the room temperature that a temperature transducer 181 detects, controller 183 sent instruction drive coil 131.The instruction of actuator 184 responsing excitations provides field current to coil 131.When being energized, coil 131 can make magnetic circuit component, promptly attracts part 132 and plunger 134, forms magnetic circuit.Size according to field current is attracting to produce suction between part 132 and the plunger 134.Plunger 134 is attracted to and attracts part 132 and utilize electromagnetism iron 133 upwards to promote valve body 123 like this.Film 111 is according to the suction pressure P that is imported by suction pressure introduction hole 112a sVariation and move.The motion that feeling of stress measuring staff 122 transmits film 111 to valve body 123.Thereby the balance between the thrust by electromagnet part 130 and the thrust of pressure sensing part 110 is determined the opening size (opening size of valve opening 125) of control valve 1a.
When cooling load was very big, the difference between the target temperature that temperature that is detected by temperature transducer 181 and temperature selector 182 are set was very big.Along with the temperature that is detected becomes big, controller 183 increases the field current that offers actuator 184 gradually.In this case, attract the suction between part 132 and the plunger 134 to become big.This feasible active force that reduces the opening size of valve opening 125 increases.Thereby valve body 123 is by lower suction pressure P sEffect moves to open position or closed position.That is to say that when field current was higher, control valve 1a operation was to keep lower suction pressure P s
When the opening size of being determined by valve body 123 diminishes, reduce from the flow rate of refrigerant gas that discharge chamber 212b flows to crankshaft cavity 231 via supply passage 218.Simultaneously, refrigerant gas flows to suction chamber 211b via a circuit 220 and a pressure release orifice 223 from crankshaft cavity 231.Crankshaft cavity pressure P like this cReduce.When cooling load is very big, the crankshaft cavity pressure P in the cylinder thorax 221 cWith suction pressure P sBetween difference very little.Like this, the angle of inclination of wobbler 240 is very big.
When the complete close valve orifice 125 of valve body 123, supply passage 219 is blocked.Like this, the higher pressure refrigerant gas in the discharge chamber 212b does not offer crankshaft cavity 231.This in fact balance the crankshaft cavity pressure P in the suction chamber 211a cWith suction pressure P sThereby, make the angle of inclination maximum of wobbler 240.The maximum inclination angle of wobbler 240 is limited by the applying degree that limits between projection 251a and the wobbler 240 of rotation support 251.Make the discharge capacity maximum like this.
On the contrary, when the difference between the target temperature of temperature that is detected by temperature transducer 181 and temperature selector 182 settings was very little, cooling load was little.In this case, along with the temperature that is detected reduces, controller 183 reduces to refer to order the field current that gives actuator 184 gradually.When field current is low, attract the suction between part 132 and the plunger 134 very weak.This makes and reduces along the power that acts on the direction of the opening amount that reduces to be determined by valve body 123.Like this, valve body 123 is by high suction pressure P sEffect moves to open position or closed position.That is to say that operation control valve 1a is to keep high suction pressure P s
When the opening size of being determined by valve body 123 became big, the flow rate of refrigerant gas that flows to crankshaft cavity 231 from discharge chamber 212a increased, and has increased the crankshaft cavity pressure P like this cIf cooling load is little, the suction pressure P in the cylinder thorax 221 sLower.Crankshaft cavity pressure P in the cylinder thorax 221 like this cWith suction pressure P sBetween difference very big.Thereby the angle of inclination of wobbler 240 is little.
If be less than or equal to target temperature by the temperature that temperature transducer 104 detects, then 184 pairs of coils 131 of controller 183 instruction actuators stop excitation.When the field current that puts on coil 131 is zero, attract the suction between part 132 and the plunger 134 to be eliminated.Like this valve body 123 is moved to valve opening 125 and be opened to maximum position.This makes provides a large amount of higher pressure refrigerant gas from discharge chamber 212b to crankshaft cavity 231 via supply passage 219.Increased the crankshaft cavity pressure P like this cIn this case, the angle of inclination of wobbler 240 reduces gradually.
In addition, when air-conditioning switch 180 was closed, 184 pairs of coils 131 of controller 183 instruction actuators stopped excitation.Equally in this case, the angle of inclination of wobbler 240 reduces gradually.
As mentioned above, control valve 1a is relevant to the field current operation of coil 131.That is to say that control valve 1a changes suction pressure P according to field current sDesired value.When field current was higher, valve opening 125 was with lower suction pressure P sOpen.When field current was low, valve opening 125 was with high suction pressure P sOpen.Compressor 200 changes its discharge capacity to keep suction pressure P sBe in desired value.
First embodiment's control valve 1a has the following advantages.
Control valve 1a has film 111, than cheap manufacturing of existing bellows 11 these films.This has reduced the manufacture cost of control valve 1a.
Applying between positioning surface 120b and the lower flange 112b is set at a predetermined value with the spacing C between film 111 and the valve opening 125 (top 125b).The initial deformation degree (load on spring) of film 111 meets an ideal value like this.This is easy to be provided with the characteristic of control valve 1a, and has improved the accuracy of control valve 1a.
Positioning surface 120b and top 125b are molded in the body 121.Like this, by pressure sensing part 110 being connected in control valve part 120 the spacing C between positioning surface 120b and the top 125b is set at predetermined value.Thereby improved the accuracy of control valve 1a.
Apical pore 113a is circular and seal 114 is spherical.Seal 114 reliably closing apical pore 113a like this.Because seal 114 is to be welded on the apical pore 113a under the state of closed apical pore 113a, thereby avoids solder flux to enter Pressure testing chamber 119.In addition, because seal 114 and apical pore 113a are easy to processing, thereby reduced the manufacture cost of control valve 1a.
Because lower housing 112 has suction pressure introduction hole 112a, so suction pressure P sAct on reliably on the Pressure testing chamber 119 (film 111).In addition, because suction pressure introduction hole 112a is easy to processing, thereby reduced the manufacture cost of control valve 1a.
Even suction pressure P sToo high, the lower end of split holder 115a also contacts frame plate 115b.This stops film 111 excessive moving.Thereby prevent that film 111 is impaired.
Because hollow cylinder body portion 115c is positioned at the space that is surrounded by pressure sensing spring 116, so hollow cylinder body portion 115c has suppressed the inclination of pressure sensing spring 116.Avoided the contact between frame plate 115b and the upper casing 113 like this.Film 111 is not subjected to the influence of the surface friction drag that so will not produce between frame plate 115b and upper casing 113 like this, and accurately is out of shape according to suction pressure.This has improved the accuracy of control valve 1a.
Second to the 5th embodiment's of the present invention control valve below will be described.This explanation focuses on the difference of these embodiments with respect to the control valve 1a of Fig. 1.(second embodiment)
Fig. 2 is the cross-sectional view of a part of the control valve 1b of second embodiment of the invention.Control valve part 120 does not comprise counterpart 120a shown in Figure 1 and positioning surface 120b.Change the bottom that connects dimple 121b into and be used as a positioning surface.More particularly, connecting the degree of depth of dimple 121b and the longitudinal size of connection boss 112c is chosen as, when the following end in contact of the connection boss 112c of pressure sensing part 110 connects the bottom of dimple 121b, spacing C between film 111 and the valve opening 125 (top 125b) becomes predetermined value, and perhaps the initial deformation degree of film 111 is ideal values.For example, be connected on the connection dimple 121b by being pressed in to connect in the dimple 121b or will connect boss 112c, be fixed in connection dimple 121b connecting boss 112c with screw by connecting boss 112c.(the 3rd embodiment)
Fig. 3 is the cross-sectional view of the control valve 1c of third embodiment of the invention.Control valve 1c has a regulator 137 that is formed in the electromagnet part 130.Regulator 137 comprises the mating groove 137a and the O-ring seals 152 that are formed at a side of regulator 137.The position regulation of regulator 137 must make control valve 1c have Ideal Characteristics.Fill plunger bushing 136 to such an extent that the part of plunger bushing 136 is engaged with mating groove 137a.Like this regulator 137 is fixed in plunger bushing 136.The O-ring seals 152 that is connected in regulator 137 seals up the space between plunger bushing 136 and the regulator 137.(the 4th embodiment)
Fig. 4 is the cross-sectional view of the control valve 1d of fourth embodiment of the invention.Control valve 1d has a regulator 137 that is formed in the electromagnet part 130.Regulator 137 comprises the helical thread portion 137c and the O-ring seals 152 that are formed at a side of regulator 137.Regulator 137 by a screw in the lower openings of electromagnet part 130.The position of adjusting regulator 137 is to obtain the Ideal Characteristics of control valve 1d.Seal up space between plunger bushing 136 and the regulator 137 by welding O-ring seals 152.(the 5th embodiment)
Fig. 5 is the cross-sectional view of the control valve 1e of fifth embodiment of the invention.Control valve 1e has the regulator 137d that is formed in the electromagnet part 130.Plunger bushing 136 comprises that one is positioned at small diameter portion 136b below the major diameter part 136a around the major diameter part 136a of plunger 134 and one.The position of adjusting regulator 137d is to obtain the Ideal Characteristics of control valve 1e.Regulator 137d is welded on the small diameter portion 136b at adjusted position.Welded seal is passed through in space between plunger bushing 136 and the regulator 137d.(the 6th embodiment)
Fig. 6 is the cross-sectional view of the control valve 1f of sixth embodiment of the invention.In the 6th embodiment, plunger bushing 136 has the bottom of a sealing.A regulator 137e is formed in the pressure sensing part 110.More particularly, regulator 137e is received within 113 li of upper casings.Regulator 137e comprises the mating groove 137f and the hollow cylinder body portion 137g who extends along the axis of regulator 137e that are formed at the side of regulator 137e.Be similar to the split holder 115a of Fig. 1, the upper end of regulator 137e clamp pressure sensing spring 116.The following adjusting of the characteristic of control valve 1f.
Instrument is inserted in the apical pore 113a regulating the position of regulator 137e, thereby make control valve 1e have Ideal Characteristics.Make the part of upper casing 113 and mating groove 137f cooperate by filling upper casing 113.This is fixed on adjusted position with regulator 137e.Like this, the longitudinal size of adjusting pressure sensing spring 116 or thrust are to adjust the characteristic of control valve 1f.Subsequently, utilize the described technology of first embodiment that seal 114 is welded on the upper casing 113.This is with 119 sealings of Pressure testing chamber.In the 6th embodiment, apical pore 113a plays the effect that pressure is set hole and adjustment hole.
Second to the 6th embodiment's control valve 1b has the advantage identical with first embodiment's advantage to 1f.
Accompanying drawings embodiments of the invention.But the present invention is not limited to above-mentioned explanation, but can make amendment or change into their equivalents in the scope of appending claims.

Claims (22)

1. the control valve of a compressor with variable displacement (200) (1a, 1b, 1c, 1d, 1e, 1f), it comprises a suction passage (215), refrigerant gas flows therein with lower pressure; A discharge pressure district (212a, 212b), compressed refrigerant flows therein with higher pressure; A crankshaft cavity (231) that puts a cam (20); And a supply passage (218,219), it the discharge pressure district with touch crankshaft cavity and be connected, it is characterized in that this control valve comprises:
A body (121), it puts a valve body (123), and this valve body opens or closes the valve opening (125) that is connected in supply passage; And
A pressure sensing part (110), it is fixed on the pressure that is used on the body detect in the suction passage, and this pressure sensing partly comprises:
A film (111), it is relevant to the pressure in the suction passage and is out of shape;
One first casing (113), it has one first flange (113b) and film to determine a Pressure testing chamber (119) together; And
One second casing (112), it has one second flange (112b) and first flange fixed film together.
2. control valve as claimed in claim 1 is characterized in that, first casing has a pressure setting hole (113a) to be used for the Pressure testing chamber is set at a predetermined reference pressure, and control valve comprises that also a seal (114) is used for sealing load and sets the hole.
3. control valve as claimed in claim 1 is characterized in that, body has a positioning surface (120b, 120b) to be used for by contacting second casing location film.
4. control valve as claimed in claim 3 is characterized in that, positioning surface forms to such an extent that make the spacing (C) between film and the valve opening become a predetermined value.
5. control valve as claimed in claim 3 is characterized in that, body has a counterpart (120a) to be used for fixing the pressure sensing part.
6. control valve as claimed in claim 5 is characterized in that positioning surface contacts second flange, and counterpart and first flange joint.
7. control valve as claimed in claim 1, it is characterized in that, film comprises one in the face of first side in Pressure testing chamber with in contrast to second side of first side, the pressure sensing part also comprises a pressure sensing spring (116), it promotes film towards valve body, and pair of frame plate (115a, 115b), the opposite two ends of its clamp pressure sensing spring, and pressure sensing spring and frame plate are positioned at the Pressure testing chamber.
8. control valve as claimed in claim 7 is characterized in that, second casing has a suction pressure introduction hole 112a, is used to make the interior pressure of suction passage can act on second side of film.
9. control valve as claimed in claim 1 is characterized in that the outer periphery of first flange is welded on the outer periphery of second flange.
10. the control valve of a compressor with variable displacement, it comprises a suction passage, refrigerant gas flows therein with lower pressure; A discharge pressure district, compressed refrigerant flows therein with higher pressure; A crankshaft cavity that puts a cam; And a supply passage, it makes the discharge pressure district be connected with crankshaft cavity, it is characterized in that, and this control valve comprises:
A pressure sensing part, it detects the pressure in the suction passage, and this pressure sensing partly comprises:
A film, it is relevant to the pressure in the suction passage and is out of shape;
One first casing, it has one first flange and determines a Pressure testing chamber together with film; And
One second casing, it has this second flange of one second flange and first flange fixed film together;
A body, it puts a valve body and is used to open or close the valve opening that is connected in supply passage, it is characterized in that, and described body comprises a positioning surface, and it is formed on, and to be used for by contacting second casing in the body be film location.
11. control valve as claimed in claim 10 is characterized in that, positioning surface forms to such an extent that make the spacing between film and the valve opening become a predetermined value.
12. control valve as claimed in claim 10 is characterized in that, a counterpart that is formed in the body is used for fixing the pressure sensing part.
13. control valve as claimed in claim 12 is characterized in that, positioning surface contacts second flange, and counterpart and first flange joint.
14. control valve as claimed in claim 10 is characterized in that, this control valve comprises an electromagnet part that is connected in body, and this electromagnet partly comprises:
A coil (131);
An iron core (134) movably, its mobile valve when drive coil;
A spring (135), it will be movably iron core partly promote towards pressure sensing;
A plunger bushing (136), it puts movably iron core and spring; And
A regulator (150), it is connected in the characteristic that plunger bushing is used for changing by the thrust of Regulation spring control valve.
15. control valve as claimed in claim 14 is characterized in that, regulator is fixed on the plunger bushing by the packed column plug sleeve.
16. control valve as claimed in claim 15, it is characterized in that, plunger bushing comprises an adjustment hole (138), utilize this adjustment hole to regulate the position of regulator, and this electromagnet part comprises that also a seal (137b) is used to seal adjustment hole, and after being fixed to regulator on the plunger bushing seal is welded on the plunger bushing.
17. control valve as claimed in claim 14 is characterized in that regulator is fixed by welding on the plunger bushing.
18. control valve as claimed in claim 14 is characterized in that, regulator is a regulator (137a) with a spring, and this spring can change the position of regulator with respect to plunger bushing.
19. control valve as claimed in claim 10, it is characterized in that, the pressure sensing part also comprises a pressure sensing spring (116), it promotes film towards valve body, a frame plate (115b), an end of its contact spring and clamp pressure sensing spring, and a regulator (137e), the thrust that the other end of its clamp pressure sensing spring is used to regulate the pressure sensing spring, and pressure sensing spring, frame plate and regulator are positioned at the Pressure testing chamber.
20. control valve as claimed in claim 15, it is characterized in that, first casing has a pressure to set hole (113a), utilize this pressure to set the position that regulator is regulated in the hole, and the pressure sensing part comprises that also a seal (114) is used for confining pressure and sets the hole, and after regulator being fixed on first casing seal is welded on first casing.
21. a method of making the control valve of compressor with variable displacement, wherein this control valve comprises a body, and it puts a valve body, and this valve body changes the opening size of valve opening; And a pressure sensing part, it is connected the pressure that is used on the body detect in the compressor, it is characterized in that this method may further comprise the steps:
The position corresponding to a predetermined spacing of distance valve opening on body forms a positioning surface;
In first casing with one first flange, place the frame plate of a pressure sensing spring and a pair of clamp pressure sensing spring opposite ends;
In second casing with one second flange, place a link;
Fix first casing and second casing by film of clamping between first flange and second flange;
Pressure in the Pressure testing chamber that will be determined by film and first casing is set at a predetermined value; And
By making second casing can contact the positioning surface of body, pressure sensing partly is connected on the body.
22. method as claimed in claim 21 is characterized in that, first casing comprises a pressure setting hole, and pressure setting step may further comprise the steps:
Utilizing pressure to set the hole reduces pressure the Pressure testing chamber;
Set the hole with the seal confining pressure; And
Seal is welded on first casing.
CNB021244294A 2002-02-28 2002-06-27 Compressor control valve and its producing method Expired - Fee Related CN100396924C (en)

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JP2002052488A JP2002327683A (en) 2001-03-01 2002-02-28 Control valve of compressor and method of manufacturing the same
JP052488/2002 2002-02-28

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CN100396924C CN100396924C (en) 2008-06-25

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Publication number Publication date
DE10227817A1 (en) 2003-09-11
KR100517823B1 (en) 2005-09-30
FR2836521B1 (en) 2006-06-02
KR20030071457A (en) 2003-09-03
CN100396924C (en) 2008-06-25
FR2836521A1 (en) 2003-08-29

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