CN100455806C - Screw compressor - Google Patents
Screw compressor Download PDFInfo
- Publication number
- CN100455806C CN100455806C CNB2004100201327A CN200410020132A CN100455806C CN 100455806 C CN100455806 C CN 100455806C CN B2004100201327 A CNB2004100201327 A CN B2004100201327A CN 200410020132 A CN200410020132 A CN 200410020132A CN 100455806 C CN100455806 C CN 100455806C
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- China
- Prior art keywords
- vortex disk
- static vortex
- discharge cover
- gas
- compressor
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Abstract
The present invention relates to a helical compressor, which comprises a fixed vortex disk, a movable vortex disk, a motor and a discharge cover, wherein the fixed vortex disk is fixed in an outer shell, the movable vortex disk is engaged with the fixed vortex disk, rotates and generates a pair of continuously moving compression chambers, the motor is arranged in the outer shell, generates motive power and causes the movable vortex disk to hover, and the discharge cover forms a discharge space sealed on the back surface of the fixed vortex disk. The helical compressor is characterized in that the helical compressor also comprises a gas suction blocking device, and the gas suction blocking device is arranged between the discharge cover or the fixed vortex disk and the outer shell and limits the free flow of suction gas. The gas suction blocking device of the helical compressor can limit the suction gas to directly contact the discharge cover with high temperature and prevent the degradation of the compressor efficiency caused by the degradation of the quality of the suction gas and the damage of a sealing component caused by overheat.
Description
Technical field
The present invention relates to a kind of screw compressor.
Background technique
Usually compressor is the machine that mechanical energy is converted to the compression potential energy of fluid.Compressor can be divided into the reciprocating type compressor usually, rotary-vane compressor, centrifugal compressor and screw compressor.
Screw compressor is different with the reciprocating type compressor that the straight line motion that utilizes piston compresses, and is the same with centrifugal compressor or rotary-vane compressor, utilizes solid of rotation to compress.Screw compressor utilizes the engagement rotation between several whirlpool dishes, allows the volume of compression chamber change, and it discharges refrigerant behind suction and the compression refrigerant.That is, the static vortex disk and the movable orbiting scroll that have the turbine shape by combination, and utilize relative movement between the two to compress.Advantages such as this screw compressor has the efficient height, noise is low, volume is little, in light weight are applied to house with fields such as air-conditioning, car air conditioners, bring into play its advantage.
As shown in Figure 1, existing screw compressor comprises shell 1, main frame 2 and sub-frame (figure slightly), motor 3, live axle 4, movable orbiting scroll 5, static vortex disk 6, one-way valve assemblying body 7 and discharges cover 8.Shell 1 has sucking pipe SP and outlet pipe DP.Main frame 2 and sub-frame are separately fixed at the both sides up and down of shell 1 inner side surface.Motor 3 is installed between main frame 2 and the sub-frame.Live axle 4 is pressed into the center portion of motor 3, runs through main frame 2, outwards transmits the power of motor 3.Movable orbiting scroll 5 combines with live axle 4, is placed on the end face of main frame 2.Static vortex disk 6 is fixed on the end face of main frame 2, combines with movable orbiting scroll 5 to form several compression chambers.One-way valve assemblying body 7 is combined in the hardboard portion back side of static vortex disk 6, prevents to discharge the refluence of gas.Discharge cover 8 is combined in the back side of static vortex disk 6, and shell 1 internal separation is become to suck nip territory and discharge nip territory.
Movable orbiting scroll 5 and static vortex disk 6 form screw type whirlpool tooth 5a, 6a respectively.Above-mentioned each whirlpool tooth 5a, 6a mutually combine, and form several couples of compression chamber P.At the front-end face of each whirlpool tooth 5a, 6a, insert combination seal parts 5b in the mode that can move up and down, 6b prevents that pressurized gas from passing through above-mentioned each whirlpool tooth 5a, the clearance leakage between 6a and the hardboard portion.Above-mentioned sealed member 5b, 6b also has spiral in shape.
In addition, the hardboard portion of static vortex disk 6 is formed with long by-pass hole.Above-mentioned by-pass hole is communicated with the suction side of shell 1, reaches uniform temperature when above when discharging gas, discharging gaseous emission to the suction side, allow the overload that the is arranged on motor 3 stator 3A upper end safty device (OLP that loads; Over LoadProtector) 9 start.As shown in Figure 1, the inlet of above-mentioned by-pass hole 6c is equipped with thermoswitch 6d.Thermoswitch 6d bimetal manufacturing reaches uniform temperature when above in the temperature of exhausting air, and is open.
Have the existing compressor of said structure, its working procedure is as follows.
After connecting power supply, live axle 4 allows movable orbiting scroll 5 rotate by eccentric distance with motor 3 rotations.Meanwhile, form several compression chambers P between whirlpool tooth 5a, the 6a of movable orbiting scroll 5 and static vortex disk 6.Along with movable orbiting scroll 5 continues rotation, compression chamber P moves to the center gradually, and its volume diminishes gradually.At this moment compressor compresses after sucking refrigerant, and discharges the refrigerant after the compression.Compressor is said process repeatedly.
Here, the temperature of discharging gas reaches uniform temperature when above, is discharged to the cold media air of discharging cover 8 inboards, can allow thermoswitch 6d start, and opens by-pass hole 6c.At this moment the part of above-mentioned cold media air is leaked by changing by-pass hole 6c, from the suction side inflow of shell 1.The high temperature refrigerant that flows to from above-mentioned suction side, the overload load protective gear 9 of startup stator 3A upper end, the power supply of cut-out motor 3 quits work compressor.
But there are the following problems for existing screw compressor overheat protection device.As shown in Figure 3, allow the part of the cold media air of discharging, by-pass flow starts overload load safty device 9 to shell 1 suction side, and cuts off the power supply of motor 3 in this way, allows compressor quit work.This control mode is so-called " control mode indirectly ".But in aforesaid way, the starting time of thermoswitch 6d, the cold media air of leakage arrive time of starting after the temperature of time of overload load safty device 9 and the above-mentioned cold media air of overload load safty device 9 perception etc. from discharging cover 8, the operating time is delayed respectively in the capital, cause compressor to be used to prevent that the overheated operating time from prolonging, might cause parts such as sealed member thus by high temperature compressed gas carbonization.
In order to address the above problem, the anti-locking apparatus of another kind of overheat of compressor was once proposed, this device allows compressor quit work rapidly by detecting the superheat state of pressurized gas, can prevent the carbonization of each parts.
In the existing screw compressor, suck the gas contact and discharging the cover outside.Therefore, suck gas and be heated expansion before flowing into compression chamber, the gaseous mass that causes flowing into compression chamber reduces, and causes the problem that compressor efficiency descends.
Summary of the invention
In order to overcome the above-mentioned shortcoming that existing screw compressor exists, the invention provides a kind of screw compressor overheat protection device, prevent to discharge cover and directly contact and cause sucking gaseous mass and reduce because of sucking gas and high temperature, and the problem of decline of initiation compressor efficiency and sealed member damage.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of screw compressor comprises static vortex disk, movable orbiting scroll, motor, discharge cover; Static vortex disk is fixed on the inside of shell; Movable orbiting scroll and static vortex disk engagement are rotated motion, produce into the compression chamber that co-continuous moves; Motor is arranged on enclosure, produces power, allows movable orbiting scroll rotate; Discharge between hood-shaped clearancen in a row, sealing is arranged on the back side of static vortex disk; It is characterized in that it also comprises air-breathing occluding device, described air-breathing occluding device is arranged on the flange of discharging between cover root or static vortex disk and the shell, is used to block the free-flow that sucks gas.
Aforesaid screw compressor, its flange are fixed on by the mode that is pressed into and discharge cover, or integrally formed with described discharge cover.
Aforesaid screw compressor, its flange is fixed on the outside of static vortex disk by the mode that is pressed into, or integrally formed with above-mentioned static vortex disk.
Aforesaid screw compressor wherein discharging on the cover, runs through that the IPR valve being set, and in a side of described flange, forms path, can allow gas flow by the IPR valve leak.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is the part profile diagram of existing screw compressor.
Fig. 2 is the profile diagram of screw compressor of the present invention.
The number in the figure explanation:
1: shell 3: motor 20: temperature transducer
3A: stator 5: movable orbiting scroll 30: overburdening protective gear
6: static vortex disk 10: discharge cover 40:IPR valve
11: terminal insertion hole 12: the sensor contact terminal
14: sensor patchhole 15: the sensor insertion groove
31: suck the gas occluding device
Embodiment
Below, with reference to accompanying drawing,, be elaborated to screw compressor overheat protection device of the present invention.
As shown in Figure 2, the screw compressor with overheat protection device of the present invention comprises, main frame 2 and sub-frame (figure slightly), motor 3, live axle 4, movable orbiting scroll 5, static vortex disk 6, discharges cover 10, sucks gas occluding device 31.Main frame 2 and sub-frame are separately fixed at the inside of shell 1.Motor 3 is installed between main frame 2 and the sub-frame.Live axle 4 is pressed among the rotor 3B of motor 3, runs through main frame 2.Movable orbiting scroll 5 is combined in the upper end of live axle 4, is rotated motion.Static vortex disk 6 is fixed on the end face of main frame 2, combines with movable orbiting scroll 5 to form several compression chambers.Discharge cover 10 is combined in the back side of static vortex disk 6, and its inside has certain discharge space S.Suck gas occluding device 31 and be arranged between above-mentioned discharge cover 10 or static vortex disk 6 and the shell 1, can limit the free-flow that sucks gas.
Have the screw compressor overheat protection device of the present invention of said structure, have following action effect.
That is, after connecting power supply on the motor 3, live axle 4 begins rotation.At this moment movable orbiting scroll 5 is rotated by eccentric distance, and compressor carries out other associated actions, sucks, compresses, discharges a succession of process of refrigerant repeatedly.
Here, cold media air from compression chamber P be discharged to discharge cover 10 after, arrange condenser again by outlet pipe DP to refrigerating circuit.At this moment, be arranged on the temperature transducer of discharging cover 10 inboards, perception is to discharging the current temperature value of cold media air that cover is discharged, and the cold media air temperature of perception and the temperature value set in advance compared, if current temperature value is than setting temperature height, then pass through signaling line (figure slightly) and transmit shutoff signal, the power supply that provides to motor 3 is provided, allow compressor quit work to overload load safty device.Here, screw compressor overheat protection device of the present invention can be by being arranged on the suction gas occluding device 31 of discharging between cover 10 or static vortex disk 6 and the shell 1, and restriction sucks the free-flow of gas.
Here, above-mentioned suction gas occluding device 31 can be fixed in the mode of discharging cover 10 by applying arbitrarily, and also can cover 10 integrally formed with above-mentioned discharge.Above-mentioned suction gas occluding device 31 can also be arranged on the outside of static vortex disk 6.
In addition, on above-mentioned discharge cover, run through that IPR valve 40 being set, and, form path, can allow gas flow by the IPR valve leak in a side of above-mentioned flange.40 pairs of head pressures of above-mentioned IP R valve and suck suction pressure and compare, when head pressure is above than the high certain value of suction pressure, promptly head pressure too high, in the time of might bringing problem to compressor, by discharging gas, deliver to the suction gas side.
Thereby, above-mentioned when being in state of thermal isolation, can limit sucking gas and discharge cover with high temperature and directly contact, can prevent the problem of the compressor efficiency decline that air-breathing quality reduction brings.
The invention effect
Helical compression machine of the present invention can limit suction gas and directly contact with the discharge cover of high temperature.
Another invention effect of helical compression machine of the present invention is to suck gas and high temperature discharge cover by restriction Directly contact prevents from reducing the compressor decrease in efficiency of bringing because of air-breathing quality.
Claims (4)
1, a kind of screw compressor comprises static vortex disk, movable orbiting scroll, motor, discharge cover; Static vortex disk is fixed on the inside of shell;
Movable orbiting scroll and static vortex disk engagement are rotated motion, produce into the compression chamber that co-continuous moves;
Motor is arranged on enclosure, produces power, allows movable orbiting scroll rotate;
Discharge between hood-shaped clearancen in a row, sealing is arranged on the back side of static vortex disk; It is characterized in that it also comprises air-breathing occluding device, described air-breathing occluding device is arranged on the flange of discharging between cover root or static vortex disk and the shell, is used to block the free-flow that sucks gas.
2, screw compressor according to claim 1 is characterized in that described flange is fixed on the discharge cover by the mode that is pressed into, or integrally formed with above-mentioned discharge cover.
3, screw compressor according to claim 1 is characterized in that described flange is fixed on the outside of static vortex disk by the mode that is pressed into, or integrally formed with described static vortex disk.
4, according to claim 1 or 2 or 3 described screw compressors, it is characterized in that on described discharge cover, run through that the IPR valve being set, and, form path in a side of described flange, can allow gas flow by the IPR valve leak.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100201327A CN100455806C (en) | 2004-07-26 | 2004-07-26 | Screw compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100201327A CN100455806C (en) | 2004-07-26 | 2004-07-26 | Screw compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1727682A CN1727682A (en) | 2006-02-01 |
| CN100455806C true CN100455806C (en) | 2009-01-28 |
Family
ID=35927137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100201327A Expired - Fee Related CN100455806C (en) | 2004-07-26 | 2004-07-26 | Screw compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100455806C (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03130589A (en) * | 1989-10-13 | 1991-06-04 | Mitsubishi Electric Corp | Scroll compressor |
| JPH0533784A (en) * | 1991-07-31 | 1993-02-09 | Kubota Corp | Scroll compressor |
| JPH05149272A (en) * | 1991-11-26 | 1993-06-15 | Mitsubishi Heavy Ind Ltd | Scroll type compressor |
| US5503542A (en) * | 1995-01-13 | 1996-04-02 | Copeland Corporation | Compressor assembly with welded IPR valve |
| JPH10220382A (en) * | 1997-02-05 | 1998-08-18 | Sanyo Electric Co Ltd | Scroll compressor |
| JPH11294350A (en) * | 1998-04-10 | 1999-10-26 | Mitsubishi Heavy Ind Ltd | Closed type scroll compressor |
| US6287089B1 (en) * | 1999-11-29 | 2001-09-11 | Scroll Technologies | Scroll compressor with heat shield |
-
2004
- 2004-07-26 CN CNB2004100201327A patent/CN100455806C/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03130589A (en) * | 1989-10-13 | 1991-06-04 | Mitsubishi Electric Corp | Scroll compressor |
| JPH0533784A (en) * | 1991-07-31 | 1993-02-09 | Kubota Corp | Scroll compressor |
| JPH05149272A (en) * | 1991-11-26 | 1993-06-15 | Mitsubishi Heavy Ind Ltd | Scroll type compressor |
| US5503542A (en) * | 1995-01-13 | 1996-04-02 | Copeland Corporation | Compressor assembly with welded IPR valve |
| JPH10220382A (en) * | 1997-02-05 | 1998-08-18 | Sanyo Electric Co Ltd | Scroll compressor |
| JPH11294350A (en) * | 1998-04-10 | 1999-10-26 | Mitsubishi Heavy Ind Ltd | Closed type scroll compressor |
| US6287089B1 (en) * | 1999-11-29 | 2001-09-11 | Scroll Technologies | Scroll compressor with heat shield |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1727682A (en) | 2006-02-01 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090128 Termination date: 20160726 |
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| CF01 | Termination of patent right due to non-payment of annual fee |