CN1955481B

CN1955481B - Variable capacity vortex compressor

Info

Publication number: CN1955481B
Application number: CN200510015674XA
Authority: CN
Inventors: 李承俊; 河森哲; 李将宇; 李根英
Original assignee: LG Electronics Tianjin Appliances Co Ltd
Current assignee: LG Electronics Tianjin Appliances Co Ltd
Priority date: 2005-10-27
Filing date: 2005-10-27
Publication date: 2010-07-07
Anticipated expiration: 2025-10-27
Also published as: CN1955481A

Abstract

A volume variable vortex compressor is composed of casing, motor, machine frame in said casing for supporting the rotary axle of motor and with vortex volute, movable vortex disc on said machine frame, eccentrically connected to the rotary axle of motor and with the first vortex volute on its lower surface to form the first compression chamber and the second vortex volute on its upper surface to form the second compression chamber, the fixed vortex disc for matching with the movable one to form the second compression chamber, and connection unit for regulating the flow channel of cold medium for sequential or alternative compression of said two compression chamber.

Description

Variable capacity vortex compressor

Technical field

The present invention relates to a kind of scroll compressor.Particularly relate to a kind of relevant variable capacity vortex compressor that when low capacity turns round, can improve compression efficiency.

Background technique

In general, scroll compressor is: the dish relative movement of a plurality of whirlpools changes the pressing chamber space continuously and sucks, compresses and discharge refrigerant.Scroll compressor is compared with other kind compressor, and volume is little, efficient is higher and performance is outstanding, so be widely used on the air regulators such as air-conditioning.

Recently, along with the variation of air conditioning function, scroll compressor also needs can the change capacity.The mode of existing change compressor capacity is, generally adopt rotation number to change compressor capacity by compressor, but adopt the machine of this mode owing to need to be equipped with baroque controller, the price of product is higher, so the demand to the capacity varying device cheap, that running is stable is very strong at present.

Fig. 1 is existing scroll compressor internal structure schematic representation; Fig. 2 a and Fig. 2 b are that existing scroll compressor is when high power capacity turn round and the working state schematic representation of low capacity when turning round.

As shown in the figure, existing scroll compressor includes: the casing 1 that is communicated with sucking pipe SP and outlet pipe DP; The inside that is fixedly mounted on casing 1 produces the drive motor 2 of rotating force; Be installed in the mainframe 3 and the secondary frame (not shown) of running shaft of the drive motor of supported on both sides up and down 2 of drive motor 2; The running shaft 2c that is installed in the top and drive motor 2 of mainframe 3 combines and the movable orbiting scroll 4 that rotatablely moves; Be fixed on top and movable orbiting scroll 4 engagements of mainframe 3, form the static vortex disk 5 of two paired pressing chamber P that move continuously; According to the operating condition of compressor, the space of each pressing chamber P with suck space S 1 and be communicated with, suitably adjust a plurality of volume-variable portion 6 of compressor capacity.

Movable orbiting scroll 4 forms the scrollwork 4a that with the scrollwork 5a of static vortex disk 5 constitute two paired pressing chamber Ps with interior roll-shape at it above the hardboard portion, and has the lug boss 4b that combines with running shaft 2c and accept drive motor 2 power in bottom surface central authorities of hardboard portion.

Static vortex disk 5 combines with the scrollwork 4a of movable orbiting scroll 4 with the scrollwork 5a that interior roll-shape forms in its hardboard portion bottom surface, and constitute two paired pressing chamber P, and has the suction port 5b that directly is communicated with sucking pipe SP in the side of hardboard portion, have with the central authorities of scrollwork 5a in its hardboard portion upper central and to be communicated with, discharge the exhaust port 5c of pressurized gass to discharging space S 2.In the hardboard portion of static vortex disk 5, have a plurality of by-pass hole 5d that are communicated to each pressing chamber P from middle pressing chamber, and on each pressing chamber P, only possess a by-pass hole 5d.By-pass hole 5d is bypassed in each pressing chamber P a part of compressed fluid in advance.

Volume-variable portion 6 includes bypass opening and closing plate 6a and actuator 6b.Bypass opening and closing plate 6a encases the hardboard portion back side part of static vortex disk 5 and can rotate; Actuator 6b connects bypass opening and closing plate 6a and is installed on the static vortex disk 5, and opens and closes by-pass hole 5d according to the volume change rotation bypass opening and closing plate 6a of compressor.

Unaccounted drawing reference numeral 2a is a stator among the figure, and 2b is a rotor.

The following describes the effect of the capacity varying device of existing scroll compressor.

Turn-on power, motor 2 task driven running shaft 2c rotation, then movable orbiting scroll 4 is the radius rotation with the eccentric distance, meanwhile a plurality of pressing chamber P form in pairs between the scrollwork 4a of movable orbiting scroll 4 and

static vortex disk

5 and 5a, these pressing chambers P reduces volume when move at the center under the effect of the continuous rotating motion of movable orbiting scroll 4, thus, directly suck the compression process of discharging again after the refrigerant compression repeatedly.

When the compressor high power capacity turns round (100% running), to actuator 6b turn-on power, the transmission part of pulling actuator 6b makes bypass opening and closing plate 6a close the by-pass hole 5d of static vortex disk, the refrigerant that sucks in the pressing chamber is stabilized compression thus, keeps original compressor capacity.

On the contrary, when the compressor low capacity turns round (67% running), there is not turn-on power in actuator 6b, the transmission part of actuator 6b is promoted by spring, bypass opening and closing plate 6a opens the by-pass hole 5d of static vortex disk 5, so the part in the pressing chamber P sucks refrigerant and flows out by the by-pass hole 5d that opens in advance in compression process, the capacity of compressor descends thus.

But, the capacity varying device of existing scroll compressor, it in low capacity running the refrigerant that the scroll compressor characteristic of volume is according to the rules discharged appropriate amount, but discharge refrigerant according to pressure, so discharging the pressure of refrigerant descends, finally cause prolong the running time of air-conditioning simultaneously, and power loss increasing because of the insufficient compression compressor efficiency descends.

Summary of the invention

Technical problem to be solved by this invention is, provides a kind of pressure of discharging refrigerant that prevents when low capacity turns round to descend, and reduces the novel variable capacity vortex compressor of power loss with this running time that shortens air-conditioning.

The technical solution adopted in the present invention is: a kind of variable capacity vortex compressor, include mainframe, movable orbiting scroll, static vortex disk, and also include connection set and constitute; Wherein, mainframe is fixedly installed on the running shaft of the inner support drive motor of casing, and is formed with the interior roll-shape scrollwork that constitutes the 1st pressing chamber; Movable orbiting scroll be installed on the mainframe and with eccentric the combination and circumnutation in upper end of the running shaft of drive motor, roll-shape the 1st scrollwork on its downside, being formed with, and form the 1st pressing chamber that moves continuously to the center between the mainframe, the 2nd scrollwork of roll-shape in the side is formed with thereon; In also being formed with on the static vortex disk scrollwork of roll-shape and with the engagement of the 2nd scrollwork of movable orbiting scroll, formed thus when the movable orbiting scroll circumnutation and moved the 2nd pressing chamber continuously to the center; Connection set is adjusted refrigerant according to operation mode and is flowed, independent compression refrigerant or compression refrigerant successively in order in two pressing chambers.

Connection set includes: the 1st sucking pipe and the 2nd sucking pipe, outlet pipe, gas connection pipe, bypass tube, the 1st modulating valve and the 2nd modulating valve constitute; The 1st sucking pipe and the 2nd sucking pipe directly are communicated with the refrigerant that the vaporizer of flowing through is provided in each pressing chamber at each pressing chamber; Outlet pipe presses spatial communication to discharge compression refrigerant to condenser with discharge; Press the space to be communicated with in the middle of gas connection pipe makes, when the compressor high power capacity turns round, directly discharge the compression refrigerant of the 1st pressing chamber to condenser with outlet pipe; Bypass tube connects the 2nd sucking pipe and gas connection pipe, and gas connection pipe is communicated with the 2nd pressing chamber, presses the centre the 1st stage compression refrigerant in space to guide to the 2nd pressing chamber when low capacity turns round; The 1st modulating valve is mounted in 2 logical valves of the adjustment cold medium flux on the 2nd sucking pipe; The 3 logical valves of pressing the space refrigerant to flow in the middle of the 2nd modulating valve is mounted in and adjusts on the link position of gas connection pipe and bypass tube.

One outer circumferential face in mainframe or the static vortex disk is close to the inner peripheral surface of casing, presses the space in the middle of the inside of casing is divided into and discharges the pressure space.

The outer circumferential face of mainframe and static vortex disk is close to the inner peripheral surface of casing, presses the space in the middle of the inside of casing is divided into and discharges the pressure space.

Side at mainframe is formed with the 1st exhaust port that penetrates into middle pressure space from the 1st pressing chamber, makes the compression refrigerant of the 1st pressing chamber press the space to discharge to the centre.

The volume of the 2nd pressing chamber is less than the volume of the 1st pressing chamber.

Under the 1st scrollwork condition identical with the spacing of the 2nd scrollwork, the scrollwork quantity of the 1st scrollwork is more than the scrollwork quantity of the 2nd scrollwork.

Drive motor is a constant speed motor.

Variable capacity vortex compressor of the present invention, both sides up and down at movable orbiting scroll are formed with press part separately, and two press parts are compressed or compression continuously separately according to the operation mode of compressor, so when low capacity turns round, keep energy level, can prevent the problem that the compressor performance that causes because of insufficient compression descends in advance, and, shorten the running time of air-conditioning with this, can reduce power loss.

Description of drawings

Fig. 1 is existing scroll compressor internal structure schematic representation;

Fig. 2 a, Fig. 2 b are that existing scroll compressor is when high power capacity turn round and the working state schematic representation of low capacity when turning round;

Fig. 3 is the structural representation of variable capacity vortex compressor of the present invention inside;

Fig. 4 a and Fig. 4 b are the operating condition system diagrams of variable capacity vortex compressor of the present invention.

Wherein:

10: casing

30: mainframe 31: axis hole

32: 33: the 1 suction ports of scrollwork

Exhaust port 40 in 34: the 1: movable orbiting scroll

42: the 2 scrollworks of 41: the 1 scrollworks

50: static vortex disk 51: scrollwork

53: the 2 exhaust ports of 52: the 2 suction ports

60: 61: the 1 sucking pipes of connection set

Sucking pipe 63 in 162: the 2: outlet pipe

64: gas connection pipe 65: bypass tube

67: the 2 modulating valve of 66 the 1st modulating valve

S1: the middle space S 2 of pressing: discharge and press the space

23: running shaft

Embodiment

Describe the embodiment of variable capacity vortex compressor of the present invention in detail below in conjunction with accompanying drawing.

Fig. 3 is the structural representation of variable capacity vortex compressor of the present invention inside; Fig. 4 a and Fig. 4 b are the operating condition system diagrams of variable capacity vortex compressor of the present invention.

As shown in the figure, variable capacity vortex compressor of the present invention includes: drive motor, mainframe 30 and secondary frame (not shown), movable orbiting scroll 40, static vortex disk 50 and connection set 60 constitute; The inside that drive motor is fixedly mounted on casing 10 produces rotating force; Mainframe 30 and secondary frame (not shown) are installed in the running shaft 23 of the drive motor of supported on both sides up and down of drive motor; Movable orbiting scroll 40 off-centre are fixed on the running shaft 23 of drive motor and with it together rotates, and and form two the 1st paired pressing chamber P1 that move continuously between the mainframe 30, form two the 2nd paired pressing chamber P2 that still move continuously between while and the static vortex disk 50; Static vortex disk 50 be fixedly mounted on mainframe 30 above, combine with movable orbiting scroll 40 and form the 2nd pressing chamber P2; Connection set 60 is regulated refrigerant according to operation mode and is flowed, make refrigerant in both sides pressing chamber P1, P2 by independent compression or compression successively in order.

Mainframe 30, the inner peripheral surface that its outer circumferential face is close to casing 10 is divided into middle space S 1 and the discharge pressure space S 2 of pressing to the inner space of casing 10, the axis hole 31 that has the running shaft 23 of radial support drive motor in the central, in the upper end of axis hole 31 promptly, in the upper central portion of mainframe 30, be formed with the scrollwork 32 that forms the interior roll-shape of the 1st pressing chamber P1 with the 1st scrollwork 41 engagements of movable orbiting scroll 40.In a side of mainframe 30 promptly, be formed with the 1st at the entry end of outermost scrollwork and suck 33, and directly be communicated with the 1st sucking pipe 61 described later; Inboard at final scrollwork is formed with the 1st exhaust port 34, so press space S 1 to be communicated with in the middle of casing 10, presses space S 1 to discharge compression refrigerant to the centre.

Movable orbiting scroll 40, roll-shape the 1st scrollwork 41 in its hardboard portion bottom surface has is with scrollwork 32 engagements of mainframe 30, form the 1st pressing chamber P1, and at its 2nd scrollwork 42 that also has above hardboard portion, scrollwork 51 engagements with static vortex disk 50 form the 2nd pressing chamber P2.In the bottom surface central authorities of hardboard portion of movable orbiting scroll 40 promptly, be formed with in the central authorities of the 1st scrollwork 41 and combine with running shaft 23 and accept the lug boss 43 of drive motor power.Preferably under the scrollwork spacing condition identical with the 1st scrollwork 41, the quantity of scrollwork is less than the scrollwork quantity of the 1st scrollwork 41, energy decreases in the time of can preventing the 2nd stage compression in this case to the 2nd scrollwork 42.

Static vortex disk 50, the scrollwork 51 of roll-shape in its hardboard portion bottom surface is formed with, the 2nd scrollwork 42 engagements with movable orbiting scroll 40, form the 2nd pressing chamber P2, and be formed with the 2nd suction port 52 in the side of its hardboard portion, and directly be communicated with the 2nd sucking pipe 62, be formed with the 2nd exhaust port 53 in its hardboard portion upper central in addition, be communicated with from the central authorities of scrollwork 51, the discharge that can make compression refrigerant be discharged to casing 10 is pressed in the space S 2.

The refrigerant that the scrollwork 51 of static vortex disk 50 compresses for the first time for following the 1st pressing chamber P1 of situation in compressor low capacity running can improve energy during in the 2nd stage compression, and its quantity will be less than the scrollwork quantity of mainframe 30.

Connection set 60 includes: the 1st sucking pipe 61 and the 2nd sucking pipe 62, outlet pipe 63, gas connection pipe 64, bypass tube the 65, the 1st modulating valve 66 and the 2nd modulating valve 67 constitute; The 1st sucking pipe 61 and the 2nd sucking pipe 62, it directly is communicated with the refrigerant that the process vaporizer is provided to each pressing chamber P1, P2 at each pressing chamber P1, P2; Outlet pipe 63 is pressed space S 2 to be communicated with to condenser with discharge and is discharged compression refrigerant; Press space S 1 to be communicated with in the middle of gas connection pipe 64 makes, when the compressor high power capacity turns round, directly discharge the compression refrigerant of the 1st pressing chamber P1 to condenser with outlet pipe 63; Bypass tube 65 connects the 2nd sucking pipe 62 and gas connection pipe 64, and gas connection pipe 64 is communicated with the 2nd pressing chamber P2, presses the centre the 1st stage compression refrigerant of space S 1 to guide to the 2nd pressing chamber P2 when low capacity turns round; The 1st modulating valve 66 is mounted in 2 logical valves of the adjustment cold medium flux on the 2nd sucking pipe 62; The 3 logical valves of pressing space S 1 refrigerant to flow in the middle of the 2nd modulating valve 67 is mounted in and adjusts on the link position of gas connection pipe 64 and bypass tube 65.

Unaccounted drawing reference numeral 2a is a stator among the figure, and 2b is a rotor

Below, the effect of variable capacity vortex compressor of the present invention is described.

Connect power supply to drive motor; running shaft 23 rotations; the movable orbiting scroll 40 that combines with running shaft 23 upper ends off-centre is along certain track circumnutation; in the process of circling round; volume reduced when the 2nd pressing chamber P2 that forms between the 1st pressing chamber P1 that forms between movable orbiting scroll 40 and the mainframe 30 and movable orbiting scroll 40 and the static vortex disk 50 moved continuously to the circumnutation center, sucked, compresses and discharge cold media air thus continuously.

Shown in Fig. 4 a, in the time of compressor high power capacity running (100% running), the 1st modulating valve 66 is opened, and the 2nd modulating valve 67 is adjusted into gas connection pipe 64 is communicated with outlet pipe 63, so suck refrigerant separately in the 1st pressing chamber P1 and the 2nd pressing chamber P2, discharge behind the compression refrigerant.

On the contrary, shown in Fig. 4 b, in the time of compressor low capacity running (67% running), the 1st modulating valve 66 cuts out, the 2nd modulating valve 67 is adjusted into gas connection pipe 64 is communicated with the 2nd sucking pipe 62, only sucks refrigerant to the 1st pressing chamber P1, sucks refrigerant to the 2nd pressing chamber P2 again after the 1st pressing chamber P1 once compresses, carry out 2 compressions, discharge refrigerant then.

Thus, compressor keeps energy in the low capacity running, so can improve compressor efficiency.

Claims

1. a variable capacity vortex compressor includes mainframe (30), movable orbiting scroll (40), static vortex disk (50), also includes connection set (60) and constitutes; Wherein, mainframe (30) is fixedly installed on the running shaft (23) of the inner support drive motor of casing (10), and is formed with the interior roll-shape scrollwork (32) that constitutes the 1st pressing chamber (P1); Movable orbiting scroll (40) be installed in that mainframe (30) is gone up and with eccentric the combination and circumnutation in upper end of the running shaft (23) of drive motor, roll-shape the 1st scrollwork (41) on its downside, being formed with, and form the 1st pressing chamber (P1) that moves continuously to the center between the mainframe (30), the 2nd scrollwork (42) of roll-shape in the side is formed with thereon; In also being formed with on the static vortex disk (50) scrollwork (51) of roll-shape and with the engagement of the 2nd scrollwork (42) of movable orbiting scroll (40), move the 2nd pressing chamber (P2) continuously to the center when being formed on movable orbiting scroll (40) circumnutation thus; Connection set (60) is adjusted refrigerant according to operation mode and is flowed, independent compression refrigerant or compression refrigerant successively in order in two pressing chambers (P1, P2); It is characterized in that connection set (60) includes: the 1st sucking pipe (61) and the 2nd sucking pipe (62), an outlet pipe (63), gas connection pipe (64), bypass tube (65), the 1st modulating valve (66) and the 2nd modulating valve (67); The 1st sucking pipe (61) and the 2nd sucking pipe (62) directly are communicated with provides the refrigerant of the vaporizer of flowing through at each pressing chamber (P1, P2) to each pressing chamber (P1, P2) lining; Outlet pipe (63) is pressed space (S2) to be communicated with to condenser with discharge and is discharged compression refrigerant; Press space (S1) to be communicated with in the middle of gas connection pipe (64) makes, when the compressor high power capacity turns round, directly discharge the compression refrigerant of the 1st pressing chamber (P1) to condenser with outlet pipe (63); Bypass tube (65) connects the 2nd sucking pipe (62) and gas connection pipe (64), and gas connection pipe (64) is communicated with the 2nd pressing chamber (P2), presses the centre the 1st stage compression refrigerant in space (S1) to guide to the 2nd pressing chamber (P2) when low capacity turns round; The 1st modulating valve (66) is mounted in 2 logical valves of the adjustment cold medium flux on the 2nd sucking pipe (62); The 3 logical valves that the 2nd modulating valve (67) presses space (S1) refrigerant to flow in the middle of being mounted in and adjusting on the link position of gas connection pipe (64) and bypass tube (65).

2. variable capacity vortex compressor according to claim 1, it is characterized in that, one outer circumferential face in mainframe (30) or the static vortex disk (50) is close to the inner peripheral surface of casing (10), presses space (S1) in the middle of the inside of casing (10) is divided into and discharges pressure space (S2).

3. variable capacity vortex compressor according to claim 1, it is characterized in that, the outer circumferential face of mainframe (30) and static vortex disk (50) is close to the inner peripheral surface of casing (10), presses space (S1) in the middle of the inside of casing (10) is divided into and discharges pressure space (S2).

4. variable capacity vortex compressor according to claim 1, it is characterized in that, side at mainframe (30) is formed with the 1st exhaust port (34) that penetrates into middle pressure space (S1) from the 1st pressing chamber (P1), makes the compression refrigerant of the 1st pressing chamber (P1) press space (S1) to discharge to the centre.

5. variable capacity vortex compressor according to claim 1 is characterized in that, the volume of the 2nd pressing chamber (P2) is less than the volume of the 1st pressing chamber (P1).

6. according to claim 1 or 4 described variable capacity vortex compressors, it is characterized in that under the 1st scrollwork (41) condition identical with the spacing of the 2nd scrollwork (42), the scrollwork quantity of the 1st scrollwork (41) is more than the scrollwork quantity of the 2nd scrollwork (42).

7. variable capacity vortex compressor according to claim 1 is characterized in that drive motor is a constant speed motor.