CN101225819B

CN101225819B - Scroll type compressor

Info

Publication number: CN101225819B
Application number: CN2007100020274A
Authority: CN
Inventors: 黄淑娥; 梁坤亿; 张钰炯; 罗志忠
Original assignee: Industrial Technology Research Institute ITRI
Current assignee: Industrial Technology Research Institute ITRI
Priority date: 2007-01-15
Filing date: 2007-01-15
Publication date: 2010-09-01
Anticipated expiration: 2027-01-15
Also published as: CN101225819A

Abstract

The invention discloses a scroll compressor, comprising a casing, a frame body, a cavity, a separating block, a scroll pair, a sliding bock, a plurality of air chambers, at least a pressure adjustment apparatus and a conduction element. An air inlet and an air outlet are arranged on the casing. The frame body is fixed outside the casing. The cavity is arranged inside the casing and is separated into a high-pressure cavity, a low-pressure cavity and a middle-pressure cavity. The separating block is arranged between the high-pressure cavity and the low-pressure cavity. The separating block comprises a protruding part on the center of the separating block and at least a passage for the separating block. The scroll pair comprises a fixed scroll and a rolling scroll, which are arranged between the separating block and the frame body in a way of meshing with each other. The sliding block is movably arranged on the top center of the fixed scroll. A plurality of air chambers are positioned between the fixed scroll and the sliding block. At least a pressure adjustment apparatus is positioned above the separating block passage. The conduction element comprises an air conduction passage which is communicated with the separating passage.

Description

Scroll compressor

Technical field

The present invention relates to a kind of scroll compressor, particularly relate to a kind of scroll compressor with pressure regulator valve.

Background technique

General existing scroll compressor is positive discharge capacity, decide the rotating speed compressor, wherein the volume ratio of compressor and compression ratio all are fixing, when load change makes the suction and the pressure that spues change, and cause the volume ratio of demand and compression ratio should along with and change is arranged, but, have fixed rotating speed and fixedly compression ratio traditional scroll compressor and can't head it off, thereby cause compressor can produce the problem of overcompression or insufficient compression, reduction running efficiency.

U.S. Pat 6,913,488 provide a kind of compressor load controlling device, collocation by slide block and scrollwork, can utilize load change to be adjusted to fixedly compression ratio, suction pressure is followed the discharge opening discharge after compression then, but because load change also can't change compression ratio, therefore, still can't regulate the change of the suction and the pressure that spues.

Summary of the invention

In view of this, the object of the present invention is to provide a kind of scroll compressor, can utilize wherein pressure adjustmenting mechanism to regulate the compression ratio of compressor, promote the usefulness of compressor.

According to the present invention, a kind of scroll compressor is provided, comprise a shell, one support body, one chamber, one spacing block, one scrollwork is right, one slide block, a plurality of air chambers, at least one pressure regulating mechanism, an and breakover element, shell has a suction port and an air outlet, support body is fixed in the shell, chamber is arranged in this shell, chamber is separated into a high-pressure chamber, one low-pressure chamber and a marginal intermediate pressure chamber, spacing block is arranged between high-pressure chamber and the low-pressure chamber, and spacing block comprises one of the middle position that is positioned at spacing block spue portion and at least one spacing block passage, scrollwork is to then comprising a fixed scroll and a moving scrollwork, and be arranged between spacing block and support body in intermeshing mode, slide block is arranged at the central authorities at fixed scroll top in a movable manner, a plurality of air chambers are arranged between fixed scroll and the slide block, at least one pressure regulating mechanism is arranged at the top of spacing block passage, breakover element comprises a gas pathway, and gas pathway and spacing block channel connection, when high-pressure chamber's pressure during less than the intermediate pressure chamber pressure, pressure regulating mechanism is opened, and the air-flow of the compression of intermediate pressure chamber is expelled to high-pressure chamber from this gas pathway in advance via this spacing block passage.

In a preferred embodiment, pressure regulating mechanism comprises a valve block, is arranged at the top of spacing block passage in regular turn, and when high-pressure chamber's pressure during greater than the intermediate pressure chamber pressure, valve block closely covers the spacing block passage.

In another preferred embodiment, pressure regulating mechanism more comprises a baffle plate, is arranged at the top of valve block.

In another preferred embodiment, breakover element more comprises a T shape element, and the gas pathway is provided with on this T shape element.

In another preferred embodiment, breakover element more comprises an elastic element, keeps being close to sealing in order to keep T shape element and spacing block.

In another preferred embodiment, spacing block more comprises a back pressure battle pin, leaks to prevent compression fluid.

In another preferred embodiment, fixed scroll and moving scrollwork more comprise a seal element.

In another preferred embodiment, a circular holding groove chamber is formed on the fixed scroll top, to hold this slide block.

In another preferred embodiment, the holding groove chamber comprises one first groove chamber and one second groove chamber, and the first groove chamber is positioned at the top of the second groove chamber, and the diameter of the first groove chamber is greater than the diameter of the second groove chamber.

In another preferred embodiment, slide block has a first portion and a second portion, and first portion is positioned at the top of second portion, and the diameter of first portion is greater than the diameter of second portion.

In another preferred embodiment, first portion and second portion more comprise an airtight element, are arranged on the outer peripheral wall of first portion and second portion.

In another preferred embodiment, airtight element is an O type ring.

In another preferred embodiment, slide block more comprises a pore, is connected with the portion of spuing.

For above-mentioned and other purpose of the present invention, feature and advantage can be become apparent, cited below particularly one concrete preferred embodiment, and cooperate appended graphic elaborating.

Description of drawings

Fig. 1 is a scroll compressor schematic representation of the present invention;

Fig. 2 is a scroll compressor of the present invention, wherein when the pressure of high-pressure chamber during less than the pressure of intermediate pressure chamber;

Fig. 3 is the pressure regulator among Fig. 1 and Fig. 2;

Fig. 4 is the scroll compressor of another embodiment of the present invention; And

Fig. 5 is the present invention's scroll compressor of another embodiment again.

The primary component symbol description:

1～scroll compressor;

10～shell;

11～suction port;

12～air outlet;

20～support body;

30～chamber;

31～high-pressure chamber;

32～low-pressure chamber;

33～intermediate pressure chamber;

40～spacing block;

41～portion spues;

42～spacing block passage;

43～back pressure battle pin;

50,50 '～scrollwork is right;

51,51 '～fixed scroll;

511～holding groove chamber;

511a～first groove the chamber;

511b～second groove the chamber;

52,52 '～moving scrollwork;

60～slide block;

61～first portion;

61a～airtight element;

62～second portion;

62a～airtight element;

63～pore;

70～air chamber;

71～the first air chambers;

72～the second air chambers;

80～pressure regulating mechanism;

81～valve block;

82～baffle plate;

90～breakover element;

91～T shape element;

91a～gas pathway;

92～elastic element;

100～seal element.

Embodiment

With reference to figure 1, scroll compressor 1 of the present invention comprises that a shell 10, a support body 20, a chamber 30, a spacing block 40, a scrollwork are to 50, one slide block 60, two air chambers 70, at least one pressure regulating mechanism 80, a breakover element 90, shell 10 has a suction port 11 and an air outlet 12, support body 20 is fixed in the shell 10, chamber 30 is arranged in the shell 10, and is separated into a high-pressure chamber 31, a low-pressure chamber 32 and a marginal intermediate pressure chamber 33; 40 of spacing blocks are arranged between high-pressure chamber 31 and the low-pressure chamber 32, and are positioned at scrollwork to 50 top, and comprise and be positioned at one of spacing block 40 middle positions spue portion 41 and at least one spacing block passage 42; Scrollwork comprises a fixed scroll 51 and a moving scrollwork 52 to 50, and be arranged between spacing block 40 and the support body 20 in intermeshing mode, and a circular holding groove chamber 511 is formed on fixed scroll 51 tops, holding groove chamber 511 comprises one first groove chamber 511a and one second groove chamber 511b, the first groove chamber 511a is positioned at the top of the second groove chamber 511b, and the diameter of the first groove chamber 511a is greater than the second groove chamber 511b.

Refer again to Fig. 1, slide block 60 is arranged in the holding groove chamber 511 at fixed scroll 51 tops in the mode that can move up and down, and comprise a first portion 61 and a second portion 62, first portion 61 is positioned on the second portion 62, and the diameter of first portion 61 is greater than the diameter of second portion 62, first portion 61 comprises that a more airtight element 61a and second portion 62 more comprise an airtight element 62a, it can be an O type ring, be arranged at respectively on the outer peripheral wall of first portion 61 and second portion 62, can prevent the gas leakage of 511 of limited slip block 60 and holding groove chambers, in addition, slide block 60 more comprises a pore 63, be positioned at the middle position of slide block 60, and be connected with the portion of spuing 41.Two air chambers 70 are respectively one first air chamber 71 and one second air chamber 72, first air chamber 71 is formed by the first portion 61 and the first groove chamber 511a, and second air chamber 72 is formed by the second portion 62 and the second groove chamber 511b, and first air chamber 71 is connected in intermediate pressure chamber 33, and both pressure equates.

Moreover, scroll compressor 1 more comprises an at least one pressure regulating mechanism 80 and a breakover element 90, pressure regulating mechanism 80 is arranged at the top of spacing block passage 42, and comprise a valve block 81 and a baffle plate 82, be arranged at spacing block passage 42 tops in regular turn, and valve block 81 is a deformable elastomer, and the function of baffle plate 82 is for preventing valve block 81 excessive deformations; And breakover element 90 is arranged at slide block 60 back sides and be connected with first air chamber 71, comprise a T shape element 91 and an elastic element 92, wherein T shape element 91 comprises a gas pathway 91a, and gas pathway 91a is connected with spacing block passage 42,92 of elastic elements can be used for keeping T shape element 91 and keep being close to sealing with spacing block 42, when high-pressure chamber's 31 pressure greater than intermediate pressure chamber 33, valve block 81 elastically deformables are with tight covering spacing block passage 42, as shown in Figure 1.In addition with reference to figure 2 and Fig. 3, when high-pressure chamber's 31 pressure during less than intermediate pressure chamber 33, pressure regulating mechanism 80 can be opened, and makes the pressure of intermediate pressure chamber 33 can be discharged to high-pressure chamber 31 in advance.

When scroll compressor 1 starts, low-pressure fluid is entered the low-pressure chamber 32 of scroll compressor 1 by the suction port 11 of shell 10, then fluid enters scrollwork in 50, utilize the mutual revolution motion of fixed scroll 51 and moving scrollwork 52, make win air chamber 71 and second air chamber 72 be full of fluid rapidly, at this moment, first air chamber 71 and second air chamber 72 make a concerted effort to put on the slide block 60, and make a concerted effort greater than the downward gravity of slide block 60, make slide block 60 upwards to be pushed away, make scroll compressor build pressure (as shown in Figure 1) rapidly, and after reaching compression ratio by the portion of spuing 41 desired gas that spues, and when scroll compressor 1 compression ratio was excessive, it is downward that variation in pressure can promote slide block 60, removes partial load.

With reference to figure 3, when the pressure demand of the gas that spues descends, can make the pressure of high-pressure chamber 31 less than intermediate pressure chamber 33 this moment, therefore, can be expelled to high-pressure chamber 31 in advance via the spacing block passage 42 of spacing block 40 from the gas pathway 91a of T shape element 91 at the air-flow (shown in the arrow among Fig. 3) of the compression of intermediate pressure chamber 33, and the ambient systems that 12 discharges connect from the air outlet, make gas can not produced thermal loss by excess compression, therefore, can further reduce wasted work, promote the usefulness of scroll compressor.

In addition, Fig. 4 is another kind of scroll compressor 1 ', its structure is roughly identical in the disclosed scroll compressor of Fig. 1 to Fig. 31, different places is that scrollwork is to all comprising a seal element 100 on 50 ' fixed scroll 51 ' and the moving scrollwork 52 ', make fixed scroll 51 ' and moving scrollwork 52 ' more can combine closely under the revolution motion mutually, can prevent that compressed fluid from leaking, and reaches the effect of compressed fluid.

Moreover with reference to figure 5, Fig. 5 is another kind of scroll compressor 1 ", its structure is roughly identical in the disclosed scroll compressor of Fig. 1 to Fig. 31, and different places is to increase at least one back pressure battle pin 43 on spacing block 40, leaks to prevent compression fluid.

It should be noted that the pressure regulating mechanism of scroll compressor 1 of the present invention 80 does not limit as shown in FIG. with the number of breakover element 90, also can increase number according to circumstances, but both must be paired, just pressure regulating mechanism breakover element of need arranging in pairs or groups.

It should be noted that

airtight element

61a and 62a can be O type ring, but be not limited to use O type ring, also visual demand and use other different element.

Though disclosed the present invention in conjunction with above preferred embodiment; yet it is not in order to limit the present invention; anyly be familiar with this operator; without departing from the spirit and scope of the present invention; change and retouching when doing some, thus protection scope of the present invention should with enclose claim was defined is as the criterion.

Claims

1. scroll compressor comprises:

Shell has suction port and air outlet;

Support body is fixed in this shell;

Chamber is arranged in this shell, is separated into high-pressure chamber, low-pressure chamber and marginal intermediate pressure chamber;

Spacing block is arranged between this high-pressure chamber and this low-pressure chamber, and comprises the portion that spues and at least one spacing block passage that is positioned at this spacing block middle position;

Scrollwork is right, comprises fixed scroll and moving scrollwork, and is arranged between this spacing block and this support body in intermeshing mode;

Slide block is arranged at the central authorities at this fixed scroll top in a movable manner;

A plurality of air chambers are arranged between this fixed scroll and this slide block;

At least one pressure regulating mechanism is arranged at the top of this spacing block passage; And

Breakover element, be arranged at this slide block, this breakover element comprises gas pathway, T shape element and elastic element, and this gas pathway and this spacing block channel connection, wherein when this high-pressure chamber's pressure during less than this intermediate pressure chamber pressure, this pressure regulating mechanism is opened, the air-flow of the compression of this intermediate pressure chamber is expelled to this high-pressure chamber from this gas pathway in advance via this spacing block passage, this gas pathway is arranged on this T shape element, and this elastic element keeps being close to sealing in order to keep this T shape element and this spacing block.

2. scroll compressor as claimed in claim 1, wherein this pressure regulating mechanism comprises valve block, is arranged at the top of this spacing block passage, when this high-pressure chamber's pressure during greater than this intermediate pressure chamber pressure, this valve block closely covers this spacing block passage.

3. scroll compressor as claimed in claim 2, wherein this pressure regulating mechanism more comprises baffle plate, is arranged at the top of this valve block.

4. scroll compressor as claimed in claim 1, wherein this spacing block more comprises the back pressure battle pin, leaks to prevent compression fluid.

5. scroll compressor as claimed in claim 1, wherein this fixed scroll and this moving scrollwork more comprise seal element.

6. scroll compressor as claimed in claim 1, wherein circular holding groove chamber is formed on this fixed scroll top, to hold this slide block.

7. scroll compressor as claimed in claim 6, wherein this holding groove chamber comprises the first groove chamber and the second groove chamber, this first groove chamber is positioned at the top of this second groove chamber, and the diameter of this first groove chamber is greater than the diameter of this second groove chamber.

8. scroll compressor as claimed in claim 6, wherein this slide block has first portion and second portion, and wherein this first portion is positioned at the top of this second portion, and the diameter of this first portion is greater than the diameter of this second portion.

9. scroll compressor as claimed in claim 8, wherein this first portion and this second portion more comprise airtight element, are arranged on the outer peripheral wall of this first portion and this second portion.

10. scroll compressor as claimed in claim 9, wherein this airtight element is an O type ring.

11. scroll compressor as claimed in claim 1, wherein this slide block more comprises pore, is connected with this portion of spuing.