CN101614206A - A kind of scroll compressor and design method thereof - Google Patents

Abstract

The invention discloses a kind of scroll compressor and design method thereof.The deciding of described scroll compressor has the unloading hole on the vortex, and on the cylinder boss of deciding vortex top, be nested with the slip ring that can move up and down, described slip ring upper surface contacts with the lower surface of high low pressure dividing plate, at described slip ring and decide to have between the vortex Returnning spring and unloading hole Sealing, described Returnning spring is installed in the counterbore of deciding vortex top, and described unloading hole Sealing is installed in to be decided in the counterbore corresponding with the unloading hole of vortex top.Described design method comprises size, rigidity and the quantity of determining pressure differential resetting value and calculating Returnning spring according to the designing requirement of scroll compressor.Because the gas in the compression chamber of the present invention can leak into low-pressure cavity by the unloading hole, thereby slowed down the speed that hyperbaric chamber and low-pressure cavity pressure reduction are set up, reduced starting duty,, also reduced the possibility that liquid hammer takes place from having improved the reliability of scroll compressor starting greatly.

Description

A kind of scroll compressor and design method thereof

Technical field

The present invention relates to a kind of compressor, particularly a kind of scroll compressor and design method thereof.

Background technique

As everyone knows, existing scroll compressor comprise be provided with the spirality scroll wrap decide vortex, with decide the moving vortex that is provided with the spirality scroll wrap that vortex matches, move vortex and decide a plurality of compression chambers that vortex has complemented each other to form variable volume, move vortex along its revolution orbit revolution by the driven by motor crank-driven, thereby finish suction, compression and the discharge of gas.In starting process, described a plurality of compression chambers compress the bigger resistance of generation simultaneously, and the load when making electric motor starting is very big, cause starting difficulty even possibly to start.And during compressor start, the liquid refrigerant of air-conditioning system might enter compression chamber.Because the incompressibility of liquid, compression can cause the compression chamber pressure anomaly to raise by force, can directly cause compressor damage, claims this situation to be " liquid hammer " usually.

Summary of the invention

In order to solve the above-mentioned problems in the prior art, the present invention will propose a kind of scroll compressor and design method thereof that can reduce starting duty when starting and reduce the liquid hammer possibility occurrence.

To achieve these goals, the technical solution of the utility model is as follows:

A kind of scroll compressor, mainly comprise housing, loam cake, the high low pressure dividing plate, decide vortex, moving vortex, partition ring, upper support, bent axle, rotor, motor, described moving vortex with decide vortex and complement each other to form a plurality of compression chambers, describedly decide between vortex and the high low pressure dividing plate by the sealing of high low pressure Sealing, described high low pressure dividing plate separates hyperbaric chamber and low-pressure cavity, decide that described the unloading hole is arranged on the vortex, and be nested with on the cylinder boss of deciding vortex top can be along the slip ring that axially moves up and down, described slip ring upper surface contacts with the lower surface of high low pressure dividing plate, at described slip ring and decide to have between the vortex Returnning spring and unloading hole Sealing, described Returnning spring is installed in the counterbore of deciding vortex top, and described unloading hole Sealing is installed in to be decided in the counterbore corresponding with the unloading hole of vortex top.

Of the present inventionly decide to have on the vortex two or more unloadings hole, the top in each unloading hole all is equipped with unloading hole Sealing.

Of the present inventionly decide vortex top two or more Returnning springs are installed.

A kind of design method of scroll compressor may further comprise the steps:

A, determine the pressure differential resetting value that is communicated with or closes between hyperbaric chamber and the low-pressure cavity according to the designing requirement of scroll compressor;

B, calculate size, rigidity and the quantity of Returnning spring according to described pressure differential resetting value.

Pressure differential resetting value of the present invention should guarantee compressor proper functioning in operating range less than the Minimum differntial pressure of suction, exhaust in the compressor operation scope.

The size of Returnning spring of the present invention, rigidity and quantity should satisfy following requirement: when hyperbaric chamber and low-pressure cavity pressure reduction are not higher than described pressure differential resetting value, described Returnning spring can promote slip ring and leave unloading hole Sealing, and unloading hole Sealing is open under the pressure effect of compression chamber, and the unloading hole is opened; When hyperbaric chamber and low-pressure cavity pressure reduction were higher than described pressure differential resetting value, described slip ring was pushed down unloading hole Sealing under the effect of hyperbaric chamber, make the unloading bore closure.

Compared with prior art, the present invention has following beneficial effect:

1, owing to of the present inventionly decide to have on the vortex one or more unloadings hole, connection compression chamber and low-pressure cavity, the gas in the compression chamber can leak into low-pressure cavity by described unloading hole.Because the portion gas of compression chamber can be bled into low-pressure cavity, thereby slowed down the speed that hyperbaric chamber and low-pressure cavity pressure reduction are set up, reduced starting duty, from having improved the reliability that scroll compressor starts greatly.

2, owing to of the present inventionly decide vortex and be provided with a slip ring, can be along deciding endwisely slipping of vortex.At slip ring and decide to be provided with between the vortex elastic reset member, can make slip ring decide swirl direction and move a certain distance to deviating from.Slip ring contacts with the high low pressure Sealing, when the differential pressure action of hyperbaric chamber and low-pressure cavity produces pressure to slip ring during in the high low pressure Sealing, makes slip ring to moving near deciding swirl direction.Be provided with unloading hole Sealing between the hole at slip ring and unloading,, make the unloading bore closure when slip ring unloads on the hole towards decide swirl direction when moving, unloading hole Sealing can being pressed in; When slip ring is decided swirl direction when moving dorsad, unloading hole Sealing is open under the pressure effect of compression chamber, and the unloading hole is opened.Thereby realized closing automatically and opening of unloading hole.

3, owing to of the present inventionly decide to have on the vortex one or more unloadings hole, be communicated with compression chamber and low-pressure cavity, also can be bled into low-pressure cavity if liquid refrigerant enters compression chamber, can not produce too high pressure, thereby reduce the possibility that liquid hammer takes place by the unloading hole.

4, because the present invention has reduced starting duty, scroll compressor can utilization efficiency higher and motor that starting performance is relatively low, thereby improve efficiency.

5, because location and guiding that the present invention passes through the high low pressure dividing plate and decides vortex realization slip ring, high low pressure pressure reduction transmits by existing high low pressure Sealing, at utmost utilize existing structure, and do not use the deep hole of screw and processing difficulties, so the present invention is reasonable in design, simple in structure.

Description of drawings

The present invention has 3 width of cloth accompanying drawings.Wherein:

Fig. 1 is the structural representation of scroll compressor;

Fig. 2 is the partial structurtes view before the scroll compressor starting;

Fig. 3 is the partial structurtes view after scroll compressor starts fully.

Among the figure: 1, housing, 2, loam cake, 3, the high low pressure dividing plate, 4, decide vortex, 5, moving vortex, 6, partition ring, 7, upper support, 8, bent axle, 9, rotor, 10, motor, 11, the high low pressure Sealing, 12, slip ring, 13, Returnning spring, 14, unloading hole Sealing, 15, the unloading hole, 16, hyperbaric chamber, 17, low-pressure cavity, 18, compression chamber.

Embodiment

Below in conjunction with accompanying drawing the present invention is described further.As shown in Figure 1, a kind of scroll compressor mainly compriseshousing 1,loam cake 2, high lowpressure dividing plate 3, decidevortex 4, movingvortex 5,partition ring 6,upper support 7,bent axle 8,rotor 9,motor 10, described movingvortex 5 withdecide vortex 4 and complement each other to form a plurality ofcompression chambers 18, describedly decide betweenvortex 4 and the high lowpressure dividing plate 3 by 11 sealings of high low pressure Sealing, described high lowpressure dividing plate 3 separateshyperbaric chamber 16 and low-pressure cavity 17, described decide to have on thevortex 4 unloadinghole 15, and be nested with on the cylinder boss of decidingvortex 4 tops can be along theslip ring 12 that axially moves up and down, describedslip ring 12 upper surfaces contact with the lower surface of high lowpressure dividing plate 3, at describedslip ring 12 and decide to have between thevortex 4 Returnningspring 13 and unloadinghole Sealing 14, described Returnningspring 13 is installed in the counterbore of decidingvortex 4 tops, position with restriction Returnningspring 13, described unloadinghole Sealing 14 is installed in to be decided in the counterbore corresponding with unloadinghole 15 ofvortex 4 tops, with the position of restriction unloading hole Sealing 14.Describedly decide that two ormore unloadings hole 15 is arranged on thevortex 4, the top in eachunloading hole 15 all is equipped with unloading hole Sealing 14.Describedly decidevortex 4 tops two or more Returnningsprings 13 are installed.

A kind of design method of scroll compressor may further comprise the steps:

A, determine the pressure differential resetting value that is communicated with or closes betweenhyperbaric chamber 16 and the low-pressure cavity 17 according to the designing requirement of scroll compressor;

B, calculate size, rigidity and the quantity of Returnningspring 13 according to described pressure differential resetting value.

Pressure differential resetting value of the present invention should guarantee compressor proper functioning in operating range less than the Minimum differntial pressure of suction, exhaust in the compressor operation scope.The size of described Returnningspring 13, rigidity and quantity should satisfy following requirement: whenhyperbaric chamber 16 and low-pressure cavity 17 pressure reduction are not higher than described pressure differential resetting value, described Returnningspring 13 can promoteslip ring 12 and leave unloadinghole Sealing 14, and unloadinghole Sealing 14 is open under the pressure effect ofcompression chamber 18, and unloadinghole 15 is opened; Whenhyperbaric chamber 16 and low-pressure cavity 17 pressure reduction were higher than described pressure differential resetting value, describedslip ring 12 was pushed down unloadinghole Sealing 14 under the effect ofhyperbaric chamber 16, unloadinghole 15 is closed.

Working principle of the present invention is as follows: as shown in Figure 2, before the scroll compressor starting,hyperbaric chamber 16 pressure are identical with low-pressure cavity 17 pressure, highlow pressure Sealing 14 two ends do not have pressure reduction,slip ring 12 moves up and contacts with high lowpressure dividing plate 3 under the effect of Returnningspring 13, formsslip ring 12 lower surfaces and decides ultimate range H betweenvortex 4 upper surfaces; As shown in Figure 3, when scroll compressor starts, movingvortex 5 horizontally rotatescompression chamber 18 volumes and reduces, can flow out, pushopen Sealing 14 inflow low-pressure cavity 17 in unloading hole along unloadinghole 15 with the gas in thecompression chamber 18 that is communicated with of unloadinghole 15, therefore have only portion gas to be compressed and enterhyperbaric chamber 16, thereby starting torque is reduced greatly, also can prevent liquid hammer to a certain extent; Along with the pressure in the rising of the pressure in thehyperbaric chamber 16, the low-pressure cavity 17 reduces, pressure reduction appears in high low pressure Sealing 11 two ends, under the effect of pressurereduction slip ring 12 is produced pressure.Along with this pressure of further increase of pressure reduction is also increasing, up to Returnningspring 13 is compressed,slip ring 12 moves down, and unloadinghole Sealing 14 is pressed on theunloading hole 15 its hermetically closing, formsslip ring 12 lower surfaces and decides minimum range L betweenvortex 4 upper surfaces.

Claims (6)

1, a kind of scroll compressor, mainly comprise housing (1), loam cake (2), high low pressure dividing plate (3), decide vortex (4), moving vortex (5), partition ring (6), upper support (7), bent axle (8), rotor (9), motor (10), described moving vortex (5) with decide vortex (4) and complement each other to form a plurality of compression chambers (18), describedly decide between vortex (4) and the high low pressure dividing plate (3) by high low pressure Sealing (11) sealing, described high low pressure dividing plate (3) separates hyperbaric chamber (16) and low-pressure cavity (17), it is characterized in that: decide that described unloading hole (15) is arranged on the vortex (4), and be nested with on the cylinder boss of deciding vortex (4) top can be along the slip ring that axially moves up and down (12), described slip ring (12) upper surface contacts with the lower surface of high low pressure dividing plate (3), at described slip ring (12) and decide to have between the vortex (4) Returnning spring (13) and the unloading hole Sealing (14), described Returnning spring (13) is installed in the counterbore of deciding vortex (4) top, and described unloading hole Sealing (14) is installed in to be decided in the counterbore corresponding with unloading hole (15) of vortex (4) top.

2, scroll compressor according to claim 1 is characterized in that: describedly decide that two or more unloadings hole (15) is arranged on the vortex (4), the top in each unloading hole (15) all is equipped with unloading hole Sealing (14).

3, scroll compressor according to claim 1 is characterized in that: describedly decide vortex (4) top two or more Returnning springs (13) are installed.

4, a kind of design method of scroll compressor is characterized in that: may further comprise the steps:

A, determine the pressure differential resetting value that is communicated with or closes between hyperbaric chamber (16) and the low-pressure cavity (17) according to the designing requirement of scroll compressor;

B, calculate size, rigidity and the quantity of Returnning spring (13) according to described pressure differential resetting value.

5, the design method of scroll compressor according to claim 4 is characterized in that: described pressure differential resetting value should guarantee compressor proper functioning in operating range less than the Minimum differntial pressure of suction, exhaust in the compressor operation scope.

6, the design method of scroll compressor according to claim 4, it is characterized in that: size, rigidity and the quantity of described Returnning spring (13) should satisfy following requirement: when hyperbaric chamber (16) and low-pressure cavity (17) pressure reduction are not higher than described pressure differential resetting value, described Returnning spring (13) can promote slip ring (12) and leave unloading hole Sealing (14), and unloading hole Sealing (14) is open under the pressure effect of compression chamber (18), and unloading hole (15) is opened; When hyperbaric chamber (16) and low-pressure cavity (17) pressure reduction were higher than described pressure differential resetting value, described slip ring (12) was pushed down unloading hole Sealing (14) under the effect of hyperbaric chamber (16), unloading hole (15) is closed.

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