CN1896503A

CN1896503A - Variable displacement compressor

Info

Publication number: CN1896503A
Application number: CNA2006101257780A
Authority: CN
Inventors: 深沼哲彦; 横町尚也; 江波慎吾
Original assignee: Toyoda Automatic Loom Works Ltd
Current assignee: Toyota Industries Corp
Priority date: 2005-07-15
Filing date: 2006-07-14
Publication date: 2007-01-17
Anticipated expiration: 2026-07-14
Also published as: KR20070009378A; DE602006005426D1; US20070014674A1; EP1744059B1; JP2007023900A; KR100756578B1; EP1744059A1; CN100476202C

Abstract

A variable displacement compressor for forming a refrigerant circuit with an external refrigerant circuit includes a housing, a drive shaft, a swash plate, a shaft seal member, a supply passage, a control valve and a gas passage. The housing has a suction chamber, a crank chamber, a discharge chamber and a shaft seat chamber formed therein. The discharge chamber is in communication with the crank chamber through the supply passage. The supply passage has the shaft seal chamber. The discharge chamber is in communication with the external refrigerant circuit through the gas passage, The supply passage is formed differently from the gas passage. A part of the supply passage is located adjacent to the suction chamber and nearer to the suction chamber than the discharge chamber.

Description

Capacity variable type compressor

Technical field

The present invention relates to capacity variable type compressor, it is variable that the tilt angle of the wobbler by changing compressor makes its capacity.

Background technique

In capacity variable type compressor this type of (only being called compressor hereinafter), cooled gas in exhaust chamber supplies in the crankshaft room by supply passage, cooled gas in crankshaft room is retracted in the suction chamber by discharge route simultaneously, being used for controlling the pressure of crankshaft room, thereby the tilt angle of wobbler can be adjusted.Control valve is arranged in the supply passage.When the open angle of adjusting control valve, can regulate the flow velocity that supplies to the cooled gas in the crankshaft room, thereby adjust the tilt angle of wobbler, and then adjust the stroke of piston and the capacity of compressor after this.

An envelope chamber is arranged on the outside of the live axle in the housing of compressor.Envelope parts are contained in the axle envelope chamber, are used for preventing that cooled gas from leaking out from compressor along the circumferential surface of live axle.Because axle envelope parts keep and the sliding contact of live axle circumferential surface constantly, can produce heat at the runtime of compressor countershaft envelope parts.For the too much heat that prevents axle envelope parts produces the damage that causes, compressor must have the structure that is used to cool off axle envelope parts.

Open (KOKAI) No.4-179874 of the patent application of Japanese unexamined discloses an example of this structure.Specifically, axle envelope chamber is arranged in the supply passage, supplies to the crankshaft room from discharging the chamber by its cooled gas.Cooled gas is depressurized to reduce its temperature by control valve, supplies in the crankshaft room by axle envelope chamber then.Therefore, the cooled gas in axle envelope chamber is blown in the axle envelope parts, thus cooling axle envelope parts.Prevented that so the too much heat of axle envelope parts from producing the damage that is caused.

Yet, in above-mentioned compressor, be high temperature owing to be drained into the cooled gas of discharging in the chamber, even make cooled gas be depressurized to reduce its temperature by control valve, the cooled gas that is blown in axle envelope chamber on the axle envelope parts remains high temperature.Therefore, the cooling effect of the axle envelope parts that cause by cooled gas can not fully be implemented.

The present invention aims to provide a kind of capacity variable type compressor to be used for fully cooling axle envelope parts.

Summary of the invention

The invention provides a kind of capacity variable type compressor, itself and external refrigeration path come together to form coolant path.This capacity variable type compressor comprises housing, live axle, wobbler, axle envelope parts, supply passage, control valve and gas channel.This housing has suction chamber, and crankshaft room discharges chamber and the axle envelope chamber that is formed on wherein.Live axle is by the rotatable support of housing.Wobbler is connected on the live axle, thereby makes that the tilt angle of wobbler is variable with respect to live axle.Wobbler is arranged in the crankshaft room.Axle envelope parts are arranged in the axle envelope chamber.Discharging the chamber is connected with crankshaft room by supply passage.Supply passage comprises axle envelope chamber.Control valve is arranged in the supply passage.By the aperture of adjusting control valve, can be adjusted from the flow velocity that the discharge chamber supplies to the cooled gas of crankshaft room by supply passage.Discharging the chamber is connected with the external refrigeration path by gas channel.Supply passage is formed different with gas channel.The part of supply passage is set contiguous suction chamber, and than discharging the chamber more near suction chamber.

Others of the present invention will be from following description, in conjunction with the accompanying drawings, becomes obvious in by example principle of the present invention being set forth.

Description of drawings

Being considered to novel feature of the present invention proposes in additional claim especially.Referring to the following description of the currently preferred embodiment that combines with accompanying drawing, the present invention and purpose thereof and advantage will obtain best understanding, wherein:

Fig. 1 is the longitudinal cross-section view that shows capacity variable type compressor according to the first embodiment of the present invention;

Fig. 2 is basically along the viewgraph of cross-section of line 2-2 on the direction of arrow of Fig. 1;

Fig. 3 is the longitudinal cross-section view that shows capacity variable type compressor according to a second embodiment of the present invention;

Fig. 4 is the longitudinal cross-section view that a third embodiment in accordance with the invention shows capacity variable type compressor;

Fig. 5 is basically along the viewgraph of cross-section of line 5-5 on the direction of arrow of Fig. 4;

Fig. 6 shows the viewgraph of cross-section of capacity variable type compressor of another example of the position that the part of supply passage is set up;

Fig. 7 shows the viewgraph of cross-section of capacity variable type compressor of another example of the position that the part of supply passage is set up;

Fig. 8 shows the viewgraph of cross-section of capacity variable type compressor of another example of the position that the part of supply passage is set up; With

Fig. 9 shows the viewgraph of cross-section of capacity variable type compressor of another example of the position that the part of supply passage is set up.

Embodiment

Referring to Fig. 1 and 2, capacity variable type compressor (only being called compressor hereinafter) according to a first advantageous embodiment of the invention will be described below.

Fig. 1 shows the longitudinal cross-section view of first embodiment's compressor 10; In Fig. 1, the left side of figure and right side correspond respectively to the front side and the right side of compressor 10.As shown in Figure 1, compressor 10 comprises cylinder block 11, front case 12, and it is fixedly attached on the front end of cylinder block 11, and rear case 14, and it is fixedly attached on the rear end of cylinder block 11 by valve disc device 13.Cylinder block 11, front case 12 and rear case 14 have constituted the housing of compressor 10.

Cylinder block 11 and front case 12 form crankshaft room between the two.Live axle 16 is rotatable by cylinder block 11 and front case 12 rotatable supports, so that by crankshaft room 15.Live axle 16 comprises that the first axle part of cylindrical hollow divides 16a, it has opening (at the right-hand member of Fig. 1) in the rear end, divide 16b with the second axle part of cylindrical hollow, it has opening (at the right side and the left end of Fig. 1) in the opposite end and press fit (perhaps inserting) divides among the 16a to form sleeve structure to the first axle part.O shape ring 17 is maintained at the first axle part and divides the inner circumferential surface of 16a and divide the second axle part of the front side (in the left side of Fig. 1) of 16b to divide between the external peripheral surface of 16b at the second axle part.

Live axle 16 is respectively by radial bearing 18 and 19 rotatable its opposite ends (right side of Fig. 1 and left side) that are supported on.In front case 12, axle envelope chamber 20 is formed on the place ahead of radial bearing 18.Be provided at as the lip seal 21 of axle envelope parts between the circumferential surface and axle envelope chamber 20 of front side of live axle 16 (perhaps the first axle part divides 16a).21 moment and live axle 16 sliding contacts of lip seal, thus can prevent that cooled gas from leaking into the outside of compressor 10 from crankshaft room 15 along the circumferential surface of live axle 16.

In cylinder block 11, holding space S is arranged on the rear of radial bearing 19.The rear side of live axle 16 is arranged among the holding space S.

In crankshaft room 15, projection dish 22 is fixed on the live axle 16 and is used for therewith rotating.Thrust-bearing 23 is provided between the inner wall surface of projection dish 22 and front case 12.Wobbler 24 is arranged in the crankshaft room 15.Patchhole 24a is inserted into the centre of wobbler 24, and wherein live axle 16 is inserted into.Articulated mechanism 25 is inserted between projection dish 22 and the wobbler 24.Wobbler 24 is connected on the projection dish 22 and by patchhole 24a by articulated mechanism 25 and is supported by live axle 16.Allow wobbler 24 and projection dish 22 and live axle 16 rotates synchronously like this, but and relative drive shaft 16 inclinations when direction slip at the axis T of live axle.

Cylinder block 11 has a plurality of cylinder-bore 26 (only illustrate their) in Fig. 1, they, and extend in the direction of axis T round live axle 16 with equi-angularly space.A single head pison 27 is set with to-and-fro motion in each cylinder-bore 26.The open front of cylinder-bore 26 and after-opening are sealed by piston 27 and valve disc device 13 respectively.In cylinder-bore 26, be provided with the pressing chamber (not shown).The volume of pressing chamber changes with the to-and-fro motion of piston 27.Piston 27 is connected with the outer circumference portion branch of wobbler 24 by a pair of bearing shell 29.

In rear case 14, suction chamber 30 and discharge chamber 31 are configured to be convenient in the face of valve disc device 13.More specifically, discharge chamber 31 and be provided at the middle part of rear case 14 and the radially outward that partition wall 14a is formed on discharge chamber 31.In rear case 14, suction chamber 30 is provided at the radially outward of discharging chamber 31 by the partition wall 14a by annular shape, so that around discharging chamber 31.In addition, in rear case 14, peripheral wall 14c is formed on the radially outward place of the excircle part of suction chamber 30, to be used to form the part of rear case 14.Suction port 32 and suction valve (not shown) are provided in the valve disc device 13, so that be set between corresponding compression chambers and the suction chamber 30.In a similar fashion, exhaust port 34, expulsion valve (not shown) and stopper 35 are provided in the valve disc device 13, so that be set between corresponding compression chambers and the discharge chamber 31.

In rear case 14, be provided with accommodating chamber 50 and by discharge route 51 with discharge chamber 31 and be connected.Discharge chamber 31 and be connected on the external refrigeration path 40, thereby make that being discharged to the high pressure cooled gas of discharging chamber 31 is directed in the external refrigeration path 40 by discharge route 51 and accommodating chamber 50 by discharge route 51 and accommodating chamber 50.Therefore, discharge route 51 and accommodating chamber 50 have formed the gas channel that the cooled gas that is used for will be discharged to discharging chamber 31 imports to external refrigeration path 40.

The condenser 40a that the cooled gas that is directed to external refrigeration path 40 by gas channel is formed external refrigeration path 40 cools off.Subsequently, cooled gas expands by expansion valve 40b, is sent to then among the vaporizer 40c to be evaporated therein.The cooled gas that returns (it forms external refrigeration path 40) from vaporizer 40c is inhaled into the suction chamber 30.Compressor 10 of the present invention and external refrigeration path 40 have formed coolant path together.

In the accommodating chamber 50 of gas channel, oil separator 52 is configured to be used for separating the lubricant oil that is comprised in the cooled gas that is discharged to discharge chamber 31.Oil separator 52 comprises that oil separation part divides 52a, and it is used for separating lubricant oil and oil vessel 52b by centrifugation from cooled gas, and the oil that divides 52a to separate by oil separation part is kept at wherein temporarily.

In oil separator 52, it is cylindrical that oil separation part divides 52a to have, and its lower ending opening is in oil vessel 52b.Discharge route 51 facing to the position of oil content part 52a by opening in accommodating chamber 50.On its circumferencial direction, divide 52a from the cooled gas that discharge chamber 31 imports to accommodating chamber 50 by discharge route 51 round oil separation part.At this moment, lubricant oil is isolated from cooled gas by centrifugation, and isolated lubricant oil is kept among the oil vessel 52b temporarily.The part of the cooled gas that lubricant oil is separated is divided the inside of 52a by oil separation part, supplies to then among the condenser 40a of external refrigeration path 40.

In rear case 14, be arranged on the downstream side of accommodating chamber 50 as the electromagnetic type capacity control drive 60 of control valve.In addition, communication passage 59 is formed in the rear case 14.Oil vessel 52b and control valve 60 are interconnected by communication passage 59.And first passage 61 is formed in the rear case 14.Control valve 60 and the second channel 62 that is formed in the valve disc device 13 are interconnected by first passage 61.As shown in Figure 2, the part of first passage 61 is formed so that pass through the outer circle wall 14c of rear case 14 along the direction of axis T.That is to say that the part of first passage 61 is arranged on the radially outward place of partition wall 14a, this partition wall 14a has separated suction chamber 30 and has discharged chamber 31, and is positioned at the radially outward place of suction chamber 30, so that be set up contiguous suction chamber 30.In other words, first passage 61 these parts are set up contiguous suction chamber 30, thereby the cooled gas that makes cooled gas in this part first passage be inhaled in the chamber 30 cools off.

As Fig. 1, second channel 62 is connected with the third channel 63 that is formed on cylinder block 11, and third channel 63 is connected with holding space S.In live axle 16, four-way 64 is formed on the second axle part and divides among the 16b, so that divide 16b by the second axle part on the direction of axis T.Four-way 64 is connected with holding space S.In addition, in live axle 16, five-way road 65 is formed, so that on the direction of axis T, divide the front side of 16a to extend at the first axle part, and upwards extend in the footpath of axis T.Five-way road 65 is connected with four-way 64 and is connected with an axle envelope chamber 20 in the front case 12.Axle envelope chamber 20 is connected with crankshaft room 15 by the 6th passage 66 that is formed in the front case 12.

Therefore, discharge route 51, accommodating chamber 50 (perhaps oil vessel 52b), communication passage 59, control valve 60, first passage 61, second channel 62, third channel 63, holding space S, four-way 64, the five-way roads 65, axle envelope chamber 20 and the 6th passage 66 have formed and have been used for supplying with the cooled gas of discharging chamber 31 supply passage in the crankshaft room 15.This supply passage forms different with gas channel.When control valve 60 operations, the aperture of supply passage is adjusted.The controller (not shown) is connected to the control (work cycle control) that is used to implement electric current supply in the control valve.In supply passage, control valve 60 is provided at the upstream side of the first passage 61 that contiguous suction chamber 30 is set.That is to say that in supply passage, the first passage 61 that has formed a supply passage part is arranged on the downstream of control valve 60.

In live axle 16, exhaust port 16c is formed on the first axle part and divides among the 16a and the position between wobbler 24 and projection dish 22.Suction port 16c is connected with the 7th passage 67, and the 7th passage 67 is formed on the first axle part and divides between the inner circumferential surface of 16a and the external peripheral surface that the second axle part divides 16b.The 7th passage 67 is connected with holding space S.Holding space S is connected with the 8th passage 68 in being formed on cylinder block 11, and the 8th passage 68 is connected with the 9th passage 69 in being formed on valve disc device 13.The 9th passage is connected with suction chamber 30.Suction port 16c, the 7th passage 67, holding space S, the 8th passage 68 and the 9th passage form a suction passage, and it is used for the cooled gas of crankshaft room 15 is drawn in the suction chamber 30.In holding space S, the second axle part that lip seal L is arranged on the inner wall surface of holding space S and live axle 16 divides between the outer wall surface of rear end of 16b, the mode of cutting off mutually with the part of the part of the supply passage that defines in holding space S and suction passage.

The operation of the compressor 10 of present embodiment will be described now.When live axle 16 is rotated by the driving source (not shown), so wobbler 24 rotations and piston 27 move back and forth in corresponding cylinder-bore 26.At this moment,, be inhaled into the cylinder-bore 26 from suction chamber 30, thereby in the pressing chamber (not shown), be compressed respectively by corresponding suction valve and suction port 32 by external refrigeration path 40 circuit cooled gases.Compressed cooled gas is discharged to by corresponding exhaust port 34 and expulsion valve and discharges in the chamber 31.Be discharged to the cooled gas of discharging chamber 31 and be directed in the oil separator 52 in the accommodating chamber 50, and the oil separation part of oil separator 52 is divided 52a separating oil from cooled gas by discharge route 51.

The separated a part of cooled gas of lubricant oil divides the inside of 52a by oil separation part, yet is fed among the condenser 40a of external refrigeration path 40.That is to say that this part cooled gas imports in the external refrigeration path 40 by the gas channel that comprises accommodating chamber 50 and discharge route 51.Simultaneously, the separated another part cooled gas of lubricant oil passes through oil vessel 52b in oil separator 52, imports in the control valve 60 by communication passage 59 with the lubricant oil in oil vessel 52b then.That is to say, be discharged to the cooled gas of discharging in the chamber 31 and be assigned to the gas channel neutralization that is used for external refrigeration path 40 is used for control valve 60 by discharge route 51 communication passage 59.Therefore, in the separated importing external refrigeration path 40 and control valve 60 of cooled gas.

In the cooled gas that imports control valve 60, the flow velocity that supplies to the cooled gas in the crankshaft room 15 by supply passage can be adjusted by the aperture of adjusting control valve 60.When cooled gas passed through control valve 60, cooled gas passed through the valve portion (not shown) of control valve 60 by throttling, thereby is depressurized.When cooled gas was depressurized, the temperature of cooled gas was lowered.

In addition, the cooled gas of temperature reduction is by first passage 61.The part of first passage 61 is arranged among the periphery wall 14c, so that contiguous suction chamber 30.Simultaneously, the cooled gas that is lowered by external refrigeration path 40 circuit temperature is drawn into suction chamber 30.Cooled gas in suction chamber 30 is lower than the cooled gas temperature by supply passage (first passage 61).Therefore, the cooled gas that is inhaled in the chamber 30 of the cooled gas of the first passage 61 by supply passage cools off.That is to say, be discharged to and discharge in the chamber 31 that the cooled gas of the part by control valve 60 and supply passage is cooled off by two cooling units then, in other words, is control valve 60 and suction chamber 30.Therefore, the temperature that is discharged to the cooled gas of discharging in the chamber 31 then the part by control valve 60 and supply passage is lower than the cooled gas of discharging chamber 31.

In live axle 16, the 7th passage 67 is formed on the radially outward place of four-way 64, so that around the four-way 64 that forms a supply passage part.Therefore, implemented heat insulating function, be used to cut off from the heat in the outside of the outer circumferential surface of live axle 16 and be sent to four-way 64, thereby kept cooled gas at four-way 64 (supply passage) at low temperature by the cooled gas of the 7th passage 67.

The cooled gas that is lowered by first passage 61 temperature passes through second channel 62, third channel 63, and holding space S, four-way 64 and five-way road 65 are drawn in the axle envelope chamber 20, are inhaled into then on the lip seal 21 of axle envelope parts 20.Owing to the lip seal 21 that produces heat with live axle 16 sliding contacts constantly can be cooled off by cooled gas.Subsequently, the cooled gas that is drawn in the axle envelope chamber 20 is supplied to the crankshaft room 15 from the 6th passage 66.

Cooled gas in crankshaft room 15 is inhaled in the suction passage, and is inhaled in the suction chamber 30.By supply passage supply to the flow velocity of the cooled gas in the crankshaft room 15 and the flow velocity of the cooled gas that from crankshaft room 15, sucks by suction passage between balance controlled, to determine (perhaps adjusting) pressure in crankshaft room 15.When the pressure change in bent axle 15, be changed in crankshaft room 15 with by the pressure difference between the cylinder-bore 26 of corresponding piston 27, thus the tilt angle of change wobbler 24.Therefore, the stroke of each piston 27 (volume of compressor 10) is adjusted.

First embodiment has following favourable effect.

(1) discharging chamber 31 and crankshaft room 15 is interconnected by supply passage.The part of supply passage (first passage 61) is arranged on the radially outward place of partition wall 14a, and is arranged on the radially outward place (in peripheral wall 14c) of suction chamber 30, so that contiguous suction chamber 30.The part of supply passage is than discharging the more contiguous suction chamber in chamber.Therefore, be discharged to and discharge in the chamber 31, know from experience the low temperature refrigeration gas that is inhaled in the chamber 30 by the cooling air of control valve 60 then and cool off.The cooled gas that is cooled supplies in the axle envelope chamber 20 by supply passage, thereby makes the cooled gas that is cooled be directed on the lip seal 21 in the axle envelope chamber 20.Therefore, supply to the cooled gas in the axle envelope chamber 20, discharge chamber 31, directly supplied to the situation of axle envelope chamber 20 then by the cooled gas of control valve 60, on temperature, reduce than being discharged to.Therefore, the temperature that imports to the cooled gas of the lip seal 21 in the axle envelope chamber 20 is lowered, thereby can fully cool off lip seal 21.

(2) compressor 10 so is provided with, and make to discharge the centre that chamber 31 is arranged on rear case 14, and annular suction chamber 30 is arranged on the radially outward place that discharges chamber 31 by partition wall 14a.In compressor 10, the part of supply passage (first passage 61) is set at position like this, makes first passage 61 and discharge chamber 31 that partition wall 14a and suction chamber 30 are clipped in the middle.Therefore, can not be subjected to discharging the influence of the high temperature cooled gas in the chamber 31 by the cooled gas of first passage 61, and even the cooled gas that can be inhaled in the chamber 30 directly cool off.Therefore, the cooled gas by first passage 61 is effectively cooled off by the cooled gas in the suction chamber 30.

(3) in addition, in compressor 10, the part of supply passage (first passage 61) is arranged among the peripheral wall 14c, and this peripheral wall 14c is arranged on the radially outward place of suction chamber 30.Therefore, the cooled gas in the suction chamber 30 can directly not heated by the cooled gas by first passage 61, for example, is set up the situation of crossing suction chamber 30 when first passage 61.Therefore, the deterioration that is heated the cooling effectiveness in the external refrigeration path 40 that is caused by the cooled gas in the suction chamber 30 is prevented.

(4) in rear case 14, part cooled gas is imported into the gas channel that external refrigeration path 40 is passed through, be imported into the communication passage of being passed through in the control valve 60 59 with another part cooled gas and so formed, make communication passage 59 separate mutually with the accommodating chamber 50 of gas channel.That is to say that share discharge route 51 through supply passage with gas channel, the formation of supply passage is different with gas channel.Therefore, be discharged to the cooled gas of discharging chamber 31 separated from discharge route 51 import to the external refrigeration path 40 and supply passage in, and the cooled gas that only supplies in the supply passage is cooled off by the cooled gas in suction chamber 30.That is to say, in the compressor 10 in an embodiment of the present invention, being discharged to all cooled gases of discharging in the chamber 31 does not import in the external refrigeration path 40, so that it is cooled on the road that feeds external refrigeration path 40 by the cooled gas in the suction chamber 30, the temperature of the cooled gas in suction chamber 30 is difficult to rise.Therefore, described as above-mentioned effect (3), be prevented by the deterioration of the cooling effectiveness in the external refrigeration path 40 that heated cooled gas caused in the suction chamber 30.

(5) in rear case 14, a part of cooled gas is imported into the gas channel that external refrigeration path 40 is passed through, and is imported into the communication passage 59 passed through in the control valve 60 by different formation with another part cooled gas.Therefore, for example, also compare with the gas passageway as the situation of supply passage, by this gas passageway, what be discharged to the cooled gas of discharging chamber 31 is imported into external refrigeration path 40, the increase of the diameter of passage can be prevented from, and the increase of the diameter of this passage is to guaranteeing that cooled gas is inessential to the flow velocity and the cooled gas of external refrigeration path 40 to the flow velocity in the crankshaft room 15.

(6) part (first passage 61) that is set up the supply passage of contiguous suction chamber 30 is arranged on the downstream side of control valve 60.Therefore, the controlled valve 60 of cooled gas reduces pressure, and the cooled gas that is inhaled into then in the chamber 30 cools off.Therefore, the cooled gas in supply passage is effectively cooled off.

(7) part of supply passage (four-way 64 and five-way road 65) is formed in the live axle 16, and the part of suction passage (the 7th passage 67) is formed on the radially outward place of the part (four-way 64 and five-way road 65) of supply passage.Therefore, cooled gas in crankshaft room 15 passes through the suction passage of position between the part of the external peripheral surface of live axle 16 and supply passage, so that produce thermal insulation between the inner region of the radially outward zone of the external peripheral surface of live axle 16 and supply passage, this cooled gas is sucked in the suction chamber 30 then.Therefore, the cooled gas in supply passage maintains low temperature, thereby low temperature refrigeration gas is blowed to lip seal 21, the further like this cooling effect that improves lip seal 21.

Referring to Fig. 3, will be described capacity variable type compressor according to a second, preferred embodiment of the present invention (only being called compressor hereinafter) below.Second embodiment and first embodiment's difference is that first embodiment's the supply passage and the position of suction passage change.Being used for being repeated in this description of same section is omitted.

As shown in Figure 3, second embodiment's live axle 16 does not provide by the first axle part and divides 16a and the second axle part to divide 16b formed sleeve portion, and is cylindrical but it forms.First passage 71 is formed in the rear case 14, and it is connected in control valve 60.First passage 71 is connected with second channel 72 in being formed on cylinder block 11.First passage 71 is arranged on the radially outward place of partition wall 14a, and this partition wall 14a separates suction chamber 30 and discharges chamber 31 and be arranged among the periphery wall 14c, and the radially outward that this periphery wall 14c is arranged on suction chamber 30 is sentenced and is convenient to be set up contiguous suction chamber 30.That is to say that the part of first passage 71 is arranged on position like this, feasible cooled gas by first passage 71 can be cooled off by the cooled gas in the suction chamber 30.Second channel 72 is connected with third channel 73 in being formed on front case 12, and third channel 73 is connected with an axle envelope chamber 20.

Axle envelope chamber 20 is connected with crankshaft room 15 by the four-way 74 that is formed in the front case 12.Therefore, discharge route 51, accommodating chamber 50 (oil vessel 52b), communication passage 59, control valve 60, first passage 71, second channel 72, third channel 73, axle envelope chamber 20 and four-way 74 have formed and have been used for supplying with the cooled gas of discharging chamber 31 supply passage in the crankshaft room 15.Suction passage 77 forms by cylinder block 11 and valve disc device 13, and wherein by this suction passage 77, crankshaft room 15 and suction chamber 30 are interconnected, thereby allows the cooled gas in crankshaft room 15 to be sucked in the suction chamber 30.

Therefore, except first embodiment's effect (1) to (6), second embodiment has following favourable effect.

(8) in a second embodiment, supply passage is formed in the housing (cylinder block 11, front case 12 and rear case 14) of compressor 10.Therefore, supply passage is cooled off by the air of the outside of compressor 10.Therefore, the temperature that is drawn into the cooled gas of lip seal 21 is lowered, thereby effectively cools off the lip seal 21 in axle envelope chamber 20.

Referring to Figure 4 and 5, will the capacity variable type compressor (only being called compressor hereinafter) according to the 3rd preferred embodiment of the present invention be described below.The 3rd embodiment and first embodiment's difference is that first embodiment's the discharge chamber and the position of suction chamber are squeezed, and the position of first embodiment's supply passage and suction passage changes.Being repeated in this description of same section is omitted.

As shown in Figure 4, suction chamber 30 is formed on the centre of rear case 14.Simultaneously, in rear case 14, partition wall 14a is formed on the radially outward place of suction chamber 30.In addition, in rear case 14, discharge chamber 31 is provided at the radially outward place through the suction chamber 30 of the partition wall 14a of annular shape, so that around suction chamber 30.And in rear case 14, outlet 31a is formed so that be connected with discharge chamber 31.Discharging chamber 31 is connected in the external refrigeration path 40 by outlet 31a.Being discharged to the high pressure cooled gas of discharging chamber 31 is directed in the external refrigeration path 40 by outlet 31a.Therefore, outlet 31a has formed gas channel.

In rear case 14, control valve 60 is set up.In addition, in rear case 14, discharge route 80 is formed so that be connected with discharge chamber 31 and control valve 60.And in rear case 14, first passage 81 is formed, so that be communicated with control valve 60 and the second channel 82 that is formed in the valve disc device 13.

As shown in Figure 5, the part of first passage 81 is formed in the rear case 14, so that by partition wall 14a.This part of first passage 81 is positioned at the inner wall surface of partition wall 14a, and this partition wall 14a separates discharge chamber 31 and suction chamber 30.This part of first passage 81 is set up contiguous suction chamber 30, that is to say, this part of first passage 81 is than discharging chamber 31 more near suction chamber.Therefore, this part of first passage 81 is arranged on position like this, and feasible cooled gas by first passage 81 is cooled off by the cooled gas in the suction chamber 30.

As shown in Figure 4, second channel 82 is communicated with third channel 83 in being formed on cylinder block 11, and third channel 83 is connected with four-way 84 in being formed on front case 12.Four-way 84 is connected with axle envelope chamber 20, and this envelope chamber 20 is connected with crankshaft room 15 by the five-way road 85 that is formed in the front case 12.Therefore, discharge route 80, control valve 60, first passage 81, second channel 82, third channel 83, the four-ways 84, axle envelope chamber 20 and five-way road 85 have formed and have been used for supplying with the cooled gas of discharging chamber 31 supply passage in the crankshaft room 15.Suction passage 87 is formed by cylinder block 11 and valve disc device 13, and by this suction passage 87, crankshaft room 15 and suction chamber 30 are interconnected, thereby allows the cooled gas in crankshaft room 15 to be sucked in the suction chamber 30.

Therefore, the 3rd embodiment has the effect (1) with first embodiment, (3) to (6) similar effect.In addition, the modification of the foregoing description can be as follows.

In first embodiment's modification, as the double dot dash line that replaces among Fig. 1 and as shown in Figure 6 other, the radially outward place that the first passage 61 of the part of formation supply passage can be configured to be convenient at partition wall 14a passes across suction chamber 30, and the part of first passage 61 can be arranged on the inside of suction chamber 30.In similar mode, in second embodiment's modification, as the double dot dash line that replaces among Fig. 3 and as shown in Figure 6 other, the radially outward place that the first passage 71 of the part of formation supply passage can be configured to be convenient at partition wall 14a passes across suction chamber 30, and the part of first passage 71 can be arranged on the inside of suction chamber 30.In these structures, the cooled gas in suction passage 30 can contact with the entire circumference of each first passage 61,71.Therefore, the entire circumference of each

first passage

61,71 can be cooled off by the cooled gas in the suction chamber 30.

In first embodiment's modification, as shown in Figure 7, a part that forms the first passage 61 of a supply passage part is set on the inner wall surface of periphery wall 14c, and this periphery wall 14c is arranged on the radially outward place of partition wall 14a.In first embodiment's modification, as shown in Figure 8, a part that forms the first passage 61 of a supply passage part is set on the outer wall surface of partition wall 14a.In these structures, the area of contact of the cooled gas of the outer surface of first passage 61 and suction chamber 30 is increased, be formed so that by periphery wall 14c or partition wall 14a than the part of first passage 61, and do not change the situation of the shape of periphery wall 14c or partition wall 14a.Therefore, the cooled gas by first passage 61 is effectively cooled off by the cooled gas in the suction chamber 30.In similar mode, in second embodiment's modification, as shown in Figure 7, a part that forms the first passage 71 of a supply passage part is set on the inner wall surface of periphery wall 14c, and this periphery wall 14c is arranged on the radially outward place of partition wall 14a.In second embodiment's modification, as shown in Figure 8, a part that forms the first passage 71 of a supply passage part is set on the outer wall surface of partition wall 14a.In these structures, the area of contact of the cooled gas of the outer surface of first passage 71 and suction chamber 30 is increased, be formed so that by periphery wall 14c or partition wall 14a than the part of first passage 71, and do not change the situation of the shape of periphery wall 14c or partition wall 14a.Therefore, the cooled gas by first passage 71 is effectively cooled off by the cooled gas in the suction chamber 30.

In the 3rd embodiment's modification, as shown in Figure 9, the radially inside place that the first passage 81 that forms the part of supply passage can be configured to be convenient at partition wall 14a passes across suction chamber 30, and the part of first passage 81 can be arranged on the inside of suction chamber 30.In this structure, the cooled gas in suction passage 30 can contact with the entire circumference wall of first passage 81.Therefore, the entire circumference wall of first passage 81 can be cooled off by the cooled gas in the suction chamber 30.

In each embodiment's modification, control valve 60 can be arranged on the downstream of the suction chamber 30 in the supply passage.

In first embodiment's modification, when live axle 16 only has four-way 64 and five-way road 65 when being formed on wherein, live axle 16 can be assigned suction port 16c and the 7th passage 67.That is to say, drive 16 and be formed having the part of supply passage, and do not have the part of suction passage.In this case, suction passage is formed in the cylinder block 11.

In each embodiment's modification, oil separator is optional.In this case, being discharged to the cooled gas of discharging chamber 31 can directly import in external refrigeration path 40 and the control valve 60.

In the 3rd embodiment's modification, the first passage 80 that forms supply passage can be formed to pass across suction chamber 30.In addition, supply passage can be formed in the live axle 16, thereby makes crankshaft room 15 and discharge chamber 31 be interconnected.

Therefore, it is example and unrestricted that current example and embodiment are considered to, and the invention is not restricted to detailed content given herein, but can make amendment within the scope of appended technological scheme.

Claims

1. be used for forming with the external refrigeration path capacity variable type compressor of coolant path, it comprises:

Housing, live axle, wobbler, axle envelope parts, supply passage and control valve, this housing has suction chamber, crankshaft room discharges chamber and the axle envelope chamber that is formed on wherein, and live axle is rotatably supported by housing, wobbler is connected on the live axle, thereby make that wobbler is variable with respect to the tilt angle of live axle, wobbler is arranged in the crankshaft room, and axle envelope parts are arranged in the axle envelope chamber, discharging the chamber is connected with crankshaft room by supply passage, supply passage comprises axle envelope chamber, and control valve is arranged in the supply passage, by the aperture of adjusting control valve, can be adjusted from the flow velocity that the discharge chamber supplies to the cooled gas of crankshaft room by supply passage

It is characterized in that: discharge the chamber and be connected with the external refrigeration path by gas channel, supply passage is formed different with gas channel, and the part of supply passage is set contiguous suction chamber, and than the discharge chamber more near suction chamber.

2. capacity variable type compressor as claimed in claim 1, wherein suction chamber is formed on the radially outward place that discharges the chamber, and the part of supply passage is arranged on the radially outward place of partition wall, and this partition wall is separated discharge chamber and suction chamber.

3. capacity variable type compressor as claimed in claim 2, wherein this part of supply passage is arranged on the radially outward place of suction chamber.

4. capacity variable type compressor as claimed in claim 2, wherein this part of supply passage is configured to pass across suction chamber.

5. capacity variable type compressor as claimed in claim 1, wherein suction chamber is formed on and discharges radially inwardly locating of chamber, and this part of supply passage is arranged on radially inwardly locating of partition wall, and this partition wall separates discharges chamber and suction chamber.

6. capacity variable type compressor as claimed in claim 5, wherein this part of supply passage is configured to pass across suction chamber.

7. capacity variable type compressor as claimed in claim 1, wherein suction chamber is formed on the radially outward place that discharges the chamber, and this part of supply passage is arranged on the outer wall surface of partition wall, and this partition wall separates discharges chamber and suction chamber.

8. capacity variable type compressor as claimed in claim 1, wherein suction chamber is formed on and discharges radially inwardly locating of chamber, and this part of supply passage is arranged on the inner wall surface of partition wall, and this partition wall separates discharges chamber and suction chamber.

9. capacity variable type compressor as claimed in claim 1, wherein this part of supply passage is arranged on the downstream side of the control valve in the supply passage.

10. capacity variable type compressor as claimed in claim 1, wherein another part of supply passage is formed in the live axle.

11. capacity variable type compressor as claimed in claim 1, wherein suction passage is arranged in the housing, be inhaled in the suction chamber by the cooled gas of this suction passage in crankshaft room, and wherein at least some parts of supply passage and suction passage are formed in the live axle, this part that is formed on the supply passage in the live axle is connected with an axle envelope chamber, and this part that is formed on the suction passage in the live axle forms between this part of live axle supply passage and live axle external peripheral surface.

12. capacity variable type compressor as claimed in claim 11, wherein live axle comprises that the first axle part of cylindrical hollow divides and be inserted into the second axle part branch of the cylindrical hollow in the first axle part branch, the part that is formed on the suction passage in the live axle is defined by the inner circumferential surface of the first axle part branch and the external peripheral surface of the second axle part branch, and this part that is formed on the supply passage in the live axle is defined by the inner circumferential surface that the second axle part divides.

13. capacity variable type compressor as claimed in claim 12, wherein holding space is defined in the adopted housing, be used for holding therein the rear end of live axle, the some parts of supply passage and suction passage is limited in this holding space by the sealed member that is arranged on the second axle part branch.

14. capacity variable type compressor as claimed in claim 13, wherein this part of supply passage is connected with holding space by the valve disc device.

15. capacity variable type compressor as claimed in claim 1, wherein supply passage and gas channel are partly shared, and be separated from one another then.

16. capacity variable type compressor as claimed in claim 1, wherein supply passage and gas channel separation ground forms.