CN100432441C

CN100432441C - Variable capacity rotation compressor

Info

Publication number: CN100432441C
Application number: CNB200510006456XA
Authority: CN
Inventors: 朴宰佑; 李承甲; 成春模
Original assignee: Samsung Electronics Co Ltd
Current assignee: Samsung Electronics Co Ltd
Priority date: 2004-07-21
Filing date: 2005-02-01
Publication date: 2008-11-12
Anticipated expiration: 2025-02-01
Also published as: KR20060008558A; CN1724872A

Abstract

A variable capacity rotation compressor with a bolt firmly fixed in the fixed holes of the rotation axis, includes an upper and a lower compression chambers with different capacities; a rotating shaft; an upper and a lower eccentric cams matched to the rotating shaft eccentricall from the rotating shaft in the same direction; an upper and a lower eccentric bushings respectively set up on the circumference of the upper and lower eccentric cams, which face to each other through the largest eccentric part of the upper and lower eccentric cams; a slot limiting between the upper and the lower eccentric bushings; and bolts fixed in the fixed holes formed in the rotation axis, for selectively switching the upper and lower eccentric bushings to a maximum eccentric rotation position. The said bolts include elliptical cross-section heads. The head part of the said bolts has a greater diameter part, and the diameter of the larger diameter part is about 0.02 mm-0.06mm larger than the diameter of the fixed holes, these heads connected to the fixed holes throught threads. The main part of the bolts is connected to the fixed holes throught threads. As a result, when a smaller vibration or shock is transferred to the bolt, the bolt will not fluff from the fixed holes.

Description

Variable capacity rotation compressor

Technical field

The present invention relates to rotary compressor,, change the capacity of rotary compressor thus in particular to can be in one of two compression chambers with different capabilities carrying out the variable capacity rotation compressor of compression alternatively by being arranged on eccentric unit on the running shaft.

Background technique

Be used for cooling unit,, have the compressor of the refrigeration agent of compression cycle in the closed-loop path of refrigeration cycle such as air-conditioning or refrigerator by the refrigeration cycle cooler environment.The cooling capacity of such cooling unit is based on the compression volume of compressor and be provided with.As a result, when the compression volume of compressor was variable, cooling unit was based on the difference between the temperature of ambient temperature and setting and optimum operation, and like this, environment can be cooled off effectively.As a result, reduced the consumption of energy.

The compressor that is used for cooling unit can be categorized as rotary compressor and reciprocating compressor.The applied rotary compressor of the present invention will illustrate below

Traditional rotary compressor comprises: be arranged on stator and rotor in the container of sealing; Running shaft by the rotor extension; Eccentric cam, described eccentric cam and running shaft form; And be arranged on roller on the periphery of the eccentric cam in the compression chamber.When running shaft was rotated, eccentric cam and roller be eccentric rotation in compression chamber, and gas is introduced in the compression chamber like this, and gas is compressed in compression chamber.Compressed gas is released to the outside of the container of sealing then.

Traditional rotary compressor with above-mentioned status architecture has fixing compression volume.As a result, compression volume does not change based on the difference between the temperature of ambient temperature and setting.

The temperature that is higher than setting when the temperature of environment is a lot, and compressor just must carry out work with cooler environment promptly with bigger compression volume.On the other hand, the difference between the temperature of ambient temperature and setting is very little, and compressor just must be operated to reduce energy consumption with less compression volume.But traditional rotary compressor carries out constant operation with fixing compression volume, and no matter the difference between the temperature of ambient temperature and setting.As a result, traditional rotary compressor is not according to the temperature of environment and optimum operation, and energy is wasted as a result.

Summary of the invention

Therefore, an object of the present invention is to provide and a kind ofly can be in one of two compression chambers with different capabilities carry out the variable capacity rotation compressor of compression alternatively, change the capacity of rotary compressor thus by being arranged on eccentric unit on the running shaft.

Other one side of the present invention provides a kind of variable capacity rotation compressor, and it has the latch (latch pin) in the fixed hole that stably is fixed on running shaft.

According to an aspect of the present invention, the invention provides a kind of variable capacity rotation compressor, comprising: have the upper and lower compression chamber of different capabilities, upper and lower compression chamber is separate; Running shaft by upper and lower compression chamber extension; Be coupled to the upper and lower eccentric cam on the running shaft, simultaneously from rotating shaft eccentric, upper and lower eccentric cam is separately positioned in the upper and lower compression chamber; Upper and lower eccentric bush, described upper and lower eccentric bush is separately positioned on the periphery of upper and lower eccentric cam; Be limited to the groove between the upper and lower eccentric bush; Be formed on the fixed hole on the running shaft; Be fixed on the latch in the fixed hole, latch is bolted to one of two ends of groove according to the sense of rotation of running shaft like this, wherein latch has the oval cross section part that partly firmly is engaged in the fixed hole, described latch comprises: have the head of bigger diameter parts and less diameter parts, bigger and less diameter parts forms the oval cross section part together; And form and have the main body of diameter less than the cylindrical shape of the smaller diameter portion of head, and fixed hole comprises: be arranged on first diameter parts on the inside of fixed hole, first diameter parts has first diameter parts of the diameter of corresponding main body; And being arranged on second diameter parts on the inlet of fixed hole, second diameter parts has the internal diameter greater than first diameter parts.

The diameter of second diameter parts less than head than major diameter part and greater than the smaller diameter portion of head, the length of head is greater than the length of second diameter parts, like this head projection from fixed hole.

Preferably, head partly has diameter than the big 0.02mm-0.06mm of diameter of second diameter parts than major diameter.

First diameter parts has the screw thread that is formed on interior week, second diameter parts does not have screw thread to be formed on interior week simultaneously, main body has the screw thread on the periphery of being formed on, the screw thread of corresponding first diameter parts of the screw thread of main body, main body is threadingly attached in first diameter parts like this, and head is coupled in second diameter parts at full tilt.

According to an aspect of the present invention, provide a kind of variable capacity rotation compressor, having comprised: upper and lower compression chamber, described upper and lower compression chamber has different capacity, and upper and lower compression chamber is by separate; Running shaft by upper and lower compression chamber extension; Upper and lower eccentric cam, described upper and lower eccentric cam is coupled on the running shaft, and simultaneously from rotating shaft eccentric, upper and lower eccentric cam is separately positioned in the upper and lower compression chamber; Upper and lower eccentric bush, described upper and lower eccentric bush is separately positioned on the periphery of upper and lower eccentric cam; Be limited to the groove between the upper and lower eccentric bush; And latch, described latch is fixed in the fixed hole that is formed on the running shaft, latch is bolted to one of two ends of groove according to the sense of rotation of running shaft like this, wherein latch comprises main body with circular cross-section and the head with oval cross section, and head is coupled in the fixed hole at full tilt than the major diameter part like this.

Others of the present invention and/or advantage will part become apparent with reference to the description of the drawings and embodiment, perhaps can recognize by implementing the present invention.

Description of drawings

These and/or others of the present invention will be from following explanation and accompanying drawings and are readily understood, wherein:

Fig. 1 is the longitudinal cross-section view of the internal structure of variable capacity rotation compressor according to an embodiment of the invention;

Fig. 2 is the perspective exploded view that has shown from the eccentric unit of the running shaft dismounting of the variable capacity rotation compressor of Fig. 1;

Fig. 3 is that part has shown that latch is fixed on the enlarged perspective in the fixed hole shown in Figure 2;

Fig. 4 is when running shaft rotates on first sense of rotation, carries out the viewgraph of cross-section of compression in last compression chamber by eccentric unit;

Fig. 5 is equal to Fig. 4, has shown when running shaft rotates on first sense of rotation not carry out compression by eccentric unit in the lower compression chamber;

Fig. 6 is when running shaft rotates on second sense of rotation, carries out the viewgraph of cross-section of compression in the lower compression chamber by eccentric unit;

Fig. 7 is equal to Fig. 6, has shown when running shaft rotates on second sense of rotation not carry out compression by eccentric unit in last compression chamber.

Embodiment

The present invention is described in detail now with reference to accompanying drawing, and wherein similar reference number is represented similar element.Described embodiment is elaborated with reference to the accompanying drawings below.

Fig. 1 is the longitudinal cross-section view of the internal structure of variable capacity rotation compressor according to an embodiment of the invention.As shown in Figure 1, variable capacity rotation compressor comprises: be arranged on the driver element 20 in the seal container 10, be used to produce rotating force; And compression unit 30, be used for rotating force pressurized gas by driver element 20.Driver element 20 comprises: be arranged on the cylinder shape stator 22 in the seal container 10; Can be rotatably set in the rotor 23 in the stator 22; And the running shaft 21 that extends from the center of rotor 23, with rotation (on first sense of rotation) or the counterrotating of carrying out forward with rotor 23 (on second sense of rotation).

Compression unit 30 comprises: housing 33, described housing 33 have cylindrical compression chamber 31 and the cylindrical lower compression chamber 32 that is limited in the bottom of going up that is limited in the top, and upper and

lower compression chamber

31,32 has different capacity; Upper and

lower flange

35,36, the upper and lower end that described upper and

lower flange

35,36 is set at housing 33 is used for rotatably supporting rotating shaft 21; And intermediate plate 34, described intermediate plate 34 is set at and is used to separate upper and

lower compression chamber

31,32 between the upper and

lower compression chamber

31,32.

The height in the aspect ratio lower compression chamber 32 of last compression chamber 31 is big.As a result, the capacity in the Capacity Ratio lower compression chamber 32 of last compression chamber 31 is big, and more substantial gas was compressed during the result had than lower compression chamber 32 in last compression chamber 31.In other words, rotary compressor according to the present invention has transfiguration.

Alternatively, lower compression chamber 32 height can be greater than the height of last compression chamber 31.In the case, the capacity of compression chamber 31 is big on the Capacity Ratio in lower compression chamber 32, the result in lower compression chamber 32, have than in the compression chamber 31 more substantial gas be compressed.

The eccentric unit 40 of permission according to sense of rotation optional compression in one of upper and

lower compression chamber

31,32 of running shaft 21 is set in upper and

lower compression chamber

31,32, and its structure and operation describe with reference to Fig. 2-7.

In upper and

lower compression chamber

31,32 upper and

lower roll

37,38 is installed respectively, described upper and

lower roller

37,38 can be rotatably set on the periphery of eccentric unit 40.On housing 33, form upper and

lower inlet

63,64 and upper and

lower outlet

65,66, its be connected with upper and

lower compression chamber

31,32 respectively (with reference to Fig. 4 and 6).

Upper blade (upper vane) 61 is set between upper inlet 63 and upper outlet 65, and described upper blade 61 pushes upper roller 37 by supported spring 61a at seal container 10 (referring to Fig. 4) in the radial direction.At lower inlet 64 with between exporting 66 down lower blade 62 is set, described lower blade 62 is by supported spring 62a roller 38 (referring to Fig. 6) under the extruding in the radial direction of seal container 10.

In order to allow to be introduced in the compressor from liquid refrigerant gas separated refrigeration agent, passage switching unit 70 is set on the discharge pipe 69a of accumulator (accumulator) 69, introduce

passage

67,68 with opened/closed alternatively, gas refrigerant is fed into one of upper and

lower inlet

63,64 that is formed on the housing 33, the particularly inlet that is performed to squeeze operation like this.Valve 71 be installed in the passage switching unit 70 with open introduce

passage

67,68 in the lump based on the introducing passage 67 that is connected to upper inlet 63 be connected to pressure reduction between the introducing passage 68 of lower inlet 64 and the supply gas refrigeration agent, level is removable simultaneously.

The running shaft of feature of the present invention and the structure of eccentric unit describe with reference to Fig. 2,3.

Fig. 2 is the perspective exploded view that has shown from the eccentric unit of the running shaft dismounting of the variable capacity rotation compressor of Fig. 1, and Fig. 3 is that part has shown that latch is fixed on the enlarged perspective in the fixed hole shown in Figure 2.

As shown in Figure 2, eccentric unit 40 comprises: be fixed on the upper and lower

eccentric cam

41,42 on the running shaft 21, distinguish corresponding upper and

lower compression chamber

31,32 simultaneously; Be separately positioned on the upper and lower

eccentric bush

51,52 on the periphery of upper and lower

eccentric cam

41,42; Be arranged on the latch 80 between the upper and lower

eccentric cam

41,42; And be limited to groove 53 between the upper and lower

eccentric bush

51,52, and with predetermined length extending the arbitrary end that be used at groove 53 on bolt latch 80 during rotation at running shaft 21 forward or on the opposite direction simultaneously, latch 80 is carried out clutches and is operated like this.The maximum eccentric part of last eccentric bush 51 is relative with the maximum eccentric part of following eccentric bush 52.

To outer process, and vertical the setting is simultaneously around the center line C1-C1 off-centre of running shaft 21 from the periphery of running shaft 21 for upper and lower eccentric cam 41,42.Equally, upper and lower

eccentric cam

41,42 be set up like this maximum eccentric part of eccentric cam 41 on running shaft 21 maximum projections and connect between the minimum eccentric part of eccentric cam 41 on the running shaft 21 minimum projections on line of eccentricity L1-L1 correspondence from the maximum eccentric part of the following eccentric cam 42 of running shaft 21 maximum projections and following line of eccentricity L2-L2 from connecting between the minimum eccentric part of the following eccentric cam 42 of running shaft 21 minimum projections.Along the circumferential direction of attachment portion 54, be formed on the linear 180 degree angles that become that connect between the first and second end 53a, the 53b of groove 53 at 54 places, attachment portion.

The longitudinal length of last eccentric cam 41 equals the height of compression chamber 31.Similarly, the longitudinal length of following eccentric cam 42 equals the height in lower compression chamber 32.

Latch 80 comprises: have fastening/separate the head 81 of binding groove; And the main body 82 of 81 definite length extended from the head.Latch 80 is fixed in the fixed hole 90 on the running shaft 21 that is formed between the upper and lower

eccentric cam

41,42, and line of eccentricity L1-L1 and L2-L2 approximately have an angle of 90 degrees degree relatively simultaneously, and like this, latch 80 is connected to running shaft 21.The fixing of latch 80 in the fixed hole 90 of running shaft 21 is elaborated with reference to Fig. 3.

Have the last eccentric bush 51 of the corresponding upward longitudinal length of eccentric cam 41 and have the corresponding following eccentric bush 52 of the longitudinal length of eccentric cam 42 down and interconnect by attachment portion 54 each other.Groove 53 has less times greater than the width of the diameter of the head 81 of latch 80, and is being formed on the attachment portion 54 on the circumferential direction of attachment portion 54.

The upper and lower

eccentric bush

51,52 that is integrally joined to each other by attachment portion 54 is coupled on the running shaft 21, and latch 80 is inserted in the fixed hole 90 of running shaft 21 by groove 53.As a result, latch is connected to running shaft 21, is inserted through groove 53 simultaneously.

When running shaft 21 forward or when being rotated on the opposite direction, upper and lower

eccentric bush

51,52 is not rotated one of the first and

second end

53a, 53b of being bolted to groove 53 up to latch 80.When latch 80 was bolted to one of the first and second end 53a, the 53b of groove 53, upper and lower

eccentric bush

51,52 was rotating forward or on the opposite direction together with running shaft 21.

Be in about an angle of 90 degrees degree at the line of eccentricity L3-L3 that connects between the minimum and maximum eccentric part of last eccentric bush 51 with the line that between the center of the first end 53a of groove 53 and attachment portion 54, is connected.Similarly, be in about an angle of 90 degrees degree at the line of eccentricity L4-L4 that connects between the minimum and maximum eccentric part of following eccentric bush 52 with the line that between the center of the second end 53b of groove 53 and attachment portion 54, is connected.

The line of eccentricity L4-L4 of the line of eccentricity L3-L3 of last eccentric bush 51 and following eccentric bush 52 is positioned on the identical plane.When latching 80 was bolted to the first end 53a of groove 53, last eccentric bush 51 rotated (following eccentric bush also is rotated) with running shaft 21 on first sense of rotation.At this moment, the maximum eccentric of last eccentric cam 41 part partly contacts with the maximum eccentric of last eccentric bush 51, and eccentric bush 51 rotates on direction forward on the result, simultaneously from running shaft 21 maximum eccentrics (referring to Fig. 4).The maximum eccentric part of following eccentric cam 42 contacts with the minimum eccentric part of following eccentric bush 52, and eccentric bush 52 rotates on direction forward under the result, simultaneously with running shaft 21 concentric (referring to Fig. 5).

On the other hand, when latch 80 is bolted to the second end 53b of groove 53, when following eccentric bush 52 rotates with running shaft 21 on second sense of rotation, the maximum eccentric part of following eccentric cam 42 partly contacts with the maximum eccentric of following eccentric bush 52, eccentric bush 52 rotates in the opposite direction under the result, simultaneously from running shaft 21 maximum eccentrics (referring to Fig. 6).The maximum eccentric part of last eccentric cam 41 contacts with the minimum eccentric part of last eccentric bush 51, and eccentric bush 51 rotates in the opposite direction on the result, simultaneously with running shaft 21 concentric (referring to Fig. 7).

Latch 80 firmly fixes in the fixed hole 90 of running shaft 21.The fixing of latch in the fixed hole 90 describes with reference to Fig. 3.

As shown in Figure 3, fixed hole 90 comprises: be arranged on first diameter parts, 91, the first diameter parts 91 on the inside of fixed hole 90 have be formed in the screw thread of predetermined joint square on week; And be arranged on second diameter parts, 92, the second diameter parts 92 on the inlet of fixed hole 90 have inside diameter D 1, the second diameter parts 92 greater than first diameter parts 91 do not have screw thread be formed on week.

Especially, second diameter parts 92 of fixed hole 90 extends predetermined length from the periphery of running shaft 21 towards the center of running shaft 21, there is not screw thread to be formed on the interior week of second diameter parts 92 simultaneously, first diameter parts 91 of fixed hole 90 extends internally from second diameter parts 92 of fixed hole 90, screw thread is formed on the internal diameter of first diameter parts 91 simultaneously, and latch 80 is threaded in the fixed hole 90 like this.

The head 81 of latch 80 has the smaller diameter portion of the predetermined diameter D3 little with having comparison major diameter diameter D2 partly than the major diameter part of predetermined diameter D2.As a result, the head 81 of latch 80 is formed in the oval sectional shape.The main body 82 of latch 80 is formed has the cylindrical shape of diameter less than the diameter of the diameter D3 of the smaller diameter portion of head 81.The main body 82 of latch 80 is provided with the screw thread of predetermined joint square of screw thread of first diameter parts 91 of corresponding fixed hole 90.

The diameter D1 of second diameter parts 92 of fixed hole 90 less than the head 81 of latch 80 than the diameter D2 of major diameter part and greater than the diameter D3 of the smaller diameter portion of the head 81 of latch 80.

Preferably, the difference than major diameter diameter D2 partly of the diameter D1 of second diameter parts 92 of fixed hole 90 and the head 81 of latch 80 is about 0.02-0.06mm, and the head 81 of latch 80 is coupled to second diameter parts 92 of fixed hole 90 at full tilt like this.

Equally, the length of the head 81 of latch 80 is greater than the length of second diameter parts 92 of fixed hole 90, and head 81 is from fixed hole 90 projections like this, and latch 80 is fixed on (referring to Fig. 4-7) in the fixed hole 90 simultaneously.

When head 81 is rotated after latch 80 is inserted into fixed hole 90, main body 82 is threadingly attached to first diameter parts 91 of fixed hole 90, and diameter being coupled at full tilt in second diameter parts 92 of fixed hole 90 than the major diameter part less times greater than the head 81 of second diameter parts 92 of fixed hole 90 simultaneously.As a result, latch 80 is fixed in the fixed hole 90.

When vibration a little that operation produced or impact from eccentric unit 40 are transferred to latch 80, latch 80 fluffs from fixed hole 90, because the head 81 of latch 80 is coupled in second diameter parts 92 of fixed hole 90, as mentioned above at full tilt.As a result, the held stationary of the latch 80 in the fixed hole 90 is guaranteed.

Eccentric unit by structure as described above operate in or the lower compression chamber in optional compression describes with reference to Fig. 4-7 to gas refrigerant.

Fig. 4 is when running shaft rotates on first sense of rotation, in last compression chamber, carry out the viewgraph of cross-section of compression by eccentric unit, Fig. 5 is equal to Fig. 4, has shown when running shaft rotates on first sense of rotation not carry out compression by eccentric unit in the lower compression chamber.

As shown in Figure 4, be rotated predetermined angle, insert the groove 53 that is formed between the upper and lower

eccentric bush

51,52 at running shaft 21 (counter clockwise direction among Fig. 4) when first party rotates up simultaneously from the latch 80 of running shaft 21 projections.As a result, latch 80, particularly, the head 81 of latch 80 is bolted on the first end 53a of groove 53.As a result, last eccentric bush 51 is with running shaft 21 rotations.

When latch 80 is bolted to the first end 53a of groove 53, the maximum eccentric part of last eccentric cam 41 partly contacts with the maximum eccentric of last eccentric bush 51, goes up eccentric bush 51 like this and is rotated, simultaneously from the center line C1-C1 maximum eccentric of running shaft 21.As a result, upper roller 37 is rotated, and contact simultaneously limits the interior week of the housing of going up compression chamber 31, and carries out compression thus.

Meanwhile, the maximum eccentric of eccentric cam 42 part contacts with the minimum eccentric part of following eccentric bush 52, as shown in Figure 5, descends eccentric bush 52 to be rotated like this, and is simultaneously concentric with the center line C1-C1 of running shaft 21.As a result, following roller 38 is rotated, and from the separating within a predetermined distance in interior week of the housing 33 that limits lower compression chamber 32, carries out compression thus simultaneously.

When running shaft 21 rotated in first sense of rotation, the gas refrigerant that is incorporated into the last compression chamber 31 with relatively large capacity by upper inlet 63 compressed by upper roller 37, then by upper outlet 65 dischargings.On the other hand, in having the lower compression chamber 32 of less relatively capacity, do not carry out compression.As a result, rotary compressor is operated with bigger compression volume.

Fig. 6 is when running shaft rotates on second sense of rotation, in the lower compression chamber, carry out the viewgraph of cross-section of compression by eccentric unit, Fig. 7 is equal to Fig. 6, has shown when running shaft rotates on second sense of rotation not carry out compression by eccentric unit in last compression chamber.

When running shaft 21 rotates on second sense of rotation (on the clockwise direction in Fig. 6), as shown in Figure 6, compression is only carried out in lower compression chamber 32.

Especially, when running shaft 21 rotates, be bolted to the second end 53b of groove 53 from the latch 80 of running shaft 21 projections on second sense of rotation.As a result, following eccentric bush 52 and last eccentric bush 51 rotate with running shaft 21 on second sense of rotation.

As a result, the maximum eccentric of following eccentric cam 42 part partly contacts with the maximum eccentric of following eccentric bush 52, descends eccentric bush 52 to be rotated like this, simultaneously from the center line C1-C1 maximum eccentric of running shaft 21.As a result, following roller 38 is rotated, and contact simultaneously limits the interior week of the housing 33 in lower compression chamber 32, carries out compression thus.

Meanwhile, the maximum eccentric of last eccentric cam 41 part contacts with the minimum eccentric part of last eccentric bush 51, as shown in Figure 7, goes up eccentric bush 51 like this and is rotated, and is simultaneously concentric with the center line C1-C1 of running shaft 21.As a result, upper roller 37 is rotated, and from the separating within a predetermined distance in interior week of the housing 33 that limits compression chamber 31, carries out compression thus simultaneously.

As a result, be incorporated into to have relatively by lower inlet 64 and be compressed by roller 38 down than the gas refrigerant in the lower compression chamber 32 of small capacity, then by under export 66 and be released.On the other hand, have relatively large capacity on carry out compression in the compression chamber 31.As a result, rotary compressor is operated with little compression volume.

When running shaft 12, upper and lower

eccentric bush

51,52 and upper and

lower roller

37,38 were rotated, vibration a little was transferred to the latch 80 that is fixed in the fixed hole 90 continuously.Meanwhile, repeatedly two ends 53a, the 53b of punching groove 53 of latch 80.As a result, latch 80 may fluff from fixed hole 90.But, according to the present invention, the head 81 of latch 80 is formed on oval sectional shape, promptly, head 81 have less times greater than the diameter D3 of the diameter D1 of second diameter parts 92 of fixed hole 90 than the major diameter part, head 81 is fixed in second diameter parts 92 of fixed hole 90 at full tilt like this, and the main body 82 of latch 80 is threadingly attached in first diameter parts 91 of fixed hole.As a result, latch 80 does not fluff from fixed hole 90.

From clearly above-mentioned, the invention provides a kind of variable capacity rotation compressor, it can be used to carry out forward or reverse rotation with carrying out compression in one of upper and lower compression chamber with different capabilities by the eccentric unit that is arranged on the running shaft alternatively.As a result, the present invention has the effect of less energy consumption.

In addition, be securely fixed in the fixed hole that is formed on the running shaft as the latch of clutch, when a little vibration or impact were transferred to latch, latch did not fluff from fixed hole like this.As a result, eccentric unit is operated reposefully.

Although present invention has been described with reference to preferred embodiments, those of ordinary skill is appreciated that under the situation that does not deviate from the spirit and principles in the present invention and can makes amendment and change the present invention that its scope is limited by appended claims.

Claims

1. variable capacity rotation compressor comprises:

Upper and lower compression chamber, described upper and lower compression chamber has different capabilities, and upper and lower compression chamber is by separate;

Running shaft, described running shaft extends by upper and lower compression chamber;

Upper and lower eccentric cam, described upper and lower eccentric cam is coupled on the running shaft, and simultaneously from rotating shaft eccentric, upper and lower eccentric cam is separately positioned in the upper and lower compression chamber;

Upper and lower eccentric bush, described upper and lower eccentric bush is separately positioned on the periphery of upper and lower eccentric cam;

Groove, described groove are limited between the upper and lower eccentric bush;

Be formed on the fixed hole on the running shaft; And

Latch, described latch is fixed in the fixed hole, and latch is bolted to one of two ends of groove according to the sense of rotation of running shaft like this,

Wherein latch has the oval cross section part that partly firmly is engaged in the fixed hole,

Wherein, described latch comprises: have the head of bigger diameter parts and less diameter parts, bigger and less diameter parts forms the oval cross section part together; And form and have the main body of diameter less than the cylindrical shape of the smaller diameter portion of head, and wherein fixed hole comprises: be arranged on first diameter parts on the inside of fixed hole, first diameter parts has the diameter of corresponding main body; And being arranged on second diameter parts on the inlet of fixed hole, the internal diameter of second diameter parts is greater than first diameter parts.

2. compressor according to claim 1, it is characterized in that, the diameter of second diameter parts less than head than major diameter part and greater than the smaller diameter portion of head, the length of head is greater than the length of second diameter parts, like this head projection from fixed hole.

3. compressor according to claim 2 is characterized in that, head partly have diameter than major diameter than the big 0.02mm-0.06mm of diameter of second diameter parts.

4. compressor according to claim 1, it is characterized in that, first diameter parts has the screw thread that is formed on interior week, second diameter parts does not have screw thread to be formed on interior week, and wherein main body has the screw thread on the periphery of being formed on, the screw thread of corresponding first diameter parts of the screw thread of main body, main body is threadingly attached in first diameter parts like this, and head is coupled in second diameter parts at full tilt.

5. variable capacity rotation compressor comprises:

Upper and lower compression chamber, described upper and lower compression chamber has different capacity, and upper and lower compression chamber is by separate;

Running shaft by upper and lower compression chamber extension;

Be limited to the groove between the upper and lower eccentric bush; And

Latch, described latch are fixed in the fixed hole that is formed on the running shaft, and latch is bolted to one of two ends of groove according to the sense of rotation of running shaft like this,

Wherein latch comprises main body with circular cross-section and the head with oval cross section, and head is coupled in the fixed hole at full tilt than the major diameter part like this.

6. compressor according to claim 5 is characterized in that fixed hole comprises: be arranged on first diameter parts on the inside of fixed hole; And be arranged on second diameter parts on the inlet of fixed hole, the internal diameter of second diameter parts is greater than first diameter parts, thus, the main body of latch is fitted in first diameter parts of fixed hole, and the head of latch is engaged in second diameter parts of fixed hole.

7. compressor according to claim 6 is characterized in that, head partly have diameter than major diameter than the big 0.02mm-0.06mm of diameter of second diameter parts.