CN102644593A - Double-cylinder rotary compressor and control method thereof - Google Patents
Double-cylinder rotary compressor and control method thereof Download PDFInfo
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- CN102644593A CN102644593A CN2011100448141A CN201110044814A CN102644593A CN 102644593 A CN102644593 A CN 102644593A CN 2011100448141 A CN2011100448141 A CN 2011100448141A CN 201110044814 A CN201110044814 A CN 201110044814A CN 102644593 A CN102644593 A CN 102644593A
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Abstract
The invention provides a double-cylinder rotary compressor and a control method of the double-cylinder rotary compressor. An inner pressure of a closed shell of the double-cylinder rotary compressor is a high-pressure side pressure; the shell is internally provided with a motor and a compressing mechanism connected with the motor; the compressing mechanism comprises a middle separation plate for dividing a first air cylinder and a second air cylinder; a primary bearing and a secondary bearing, which are used for supporting an eccentric crank shaft, are respectively arranged on side faces of the first air cylinder and the second air cylinder; the first air cylinder is provided with a first air cylinder inlet and the second air cylinder is provided with a second air cylinder inlet; the double-cylinder rotary compressor is characterized in that an air suction hole is formed on the first air cylinder or the second air cylinder; one end of an external air suction pipe is communicated with the air suction hole; and the air suction hole is internally provided with a distance lengthening device for lengthening the distance between the first air cylinder inlet and the second air cylinder inlet. The distance lengthening device comprises an inner air suction pipe which is inserted into the air suction hole; and one end of the inner air suction pipe is opened on the outer air suction pipe. The double-cylinder rotary compressor disclosed by the invention has the advantages of low manufacturing cost, good split-flow effects and high refrigerating efficiency.
Description
Technical field
The present invention relates to a kind of rotary compressor, particularly a kind of duplex-cylinder rotary compressor and controlling method thereof.
Background technique
Two cylinders of general duplex-cylinder rotary compressor have independently sucking pipe respectively.But, in recent years,, omit wherein sucking pipe for improving the property made and reducing cost, only use the method for a sucking pipe to be used gradually.But in the design of omitting a sucking pipe, under the fast condition of machine that refrigerating capacity is big or running speed, the problem of refrigerating capacity and inefficiency highlights.
The interference of suction gas shown in accompanying drawing 1, if perforate is in close between first cylinder chamber inlet 34a of two cylinder chambers and second cylinder chamber inlet 34b respectively, will take place in the duplex-cylinder rotary compressor of existing single suction tracheae so between two cylinders.On duplex-cylinder rotary compressor because the relative position of each piston has the phase difference of 180 degree, the every rotation of each piston once, between the first cylinder 13a and the second cylinder 13b, the pressure of inspiration(Pi) in the cylinder chamber separately can produce difference.That is to say; According to the angle of swing of rolling piston, the first cylinder chamber 15a replenishes a part from the second cylinder chamber 15b and sucks gas, and is opposite; The second cylinder chamber 15b replenishes a part from the first cylinder chamber 15a and sucks gas, and this phenomenon once just takes place once in the every rotation of rolling piston.So, because of the mutual interference phenomenon of two cylinder chambers generation suction gases, the total gas flow that causes liquid-storage container 7 to be supplied with to two cylinders reduces, and causes the refrigerating capacity of compressor and running efficiency to reduce.
The loss problem that these refrigerating capacitys and running efficiency reduce is at the big machine of refrigerating capacity, and the high speed rotating stage of the duplex-cylinder rotary compressor of use variable-frequency motor is especially remarkable.
References 1 patent is openly put down into 07-103168
Summary of the invention
The object of the invention aims to provide a kind of simple and reasonable, flexible operation, fabricating cost is low, shunting effect good, refrigerating efficiency is high duplex-cylinder rotary compressor and controlling method thereof, to overcome deficiency of the prior art.
A kind of duplex-cylinder rotary compressor by this purpose design; The internal pressure of closed shell is a high side pressure; The compressing mechanism that is provided with motor in the housing and joins with motor; Compressing mechanism comprises the central diaphragm that is used to divide first cylinder and second cylinder, is used to support the main bearing of eccentric crankshaft and the side that supplementary bearing is separately positioned on first cylinder and second cylinder, and first cylinder is provided with first cylinder chamber inlet; Second cylinder is provided with second cylinder chamber inlet; Its structure characteristic is that first cylinder or second cylinder are provided with suction port, and an end of outside sucking pipe communicates with suction port, is provided with the increment device of distance between lengthening first cylinder chamber inlet and second cylinder chamber inlet in the suction port.
Said increment device comprises the inside sucking pipe that inserts in the suction port; One end opening of this inside sucking pipe is in outside sucking pipe; The other end of inner sucking pipe communicates with first cylinder chamber inlet, forms the gap between the outer wall of inner sucking pipe and the inwall of suction port, and first cylinder is provided with gas port; The central diaphragm and second cylinder are provided with the gas passageway, and the gap is communicated with second cylinder chamber inlet through gas port, gas passageway;
Perhaps; Said increment device comprises the inside sucking pipe that inserts in the suction port, and an end opening of this inside sucking pipe is in outside sucking pipe, and the other end of inner sucking pipe communicates with second cylinder chamber inlet; Form the gap between the outer wall of inner sucking pipe and the inwall of suction port; Second cylinder is provided with gas port, and the central diaphragm and first cylinder are provided with the gas passageway, and the gap is communicated with first cylinder chamber inlet through gas port, gas passageway.
Circulation area in the said inner sucking pipe equates with the circulation area in gap.
The circulation area in the said inner sucking pipe and the circulation area in gap are unequal.
The center of said suction port and the coaxial setting in the center of inner sucking pipe.
The center of said suction port and the center-biased of inner sucking pipe.
Said inner sucking pipe is steel pipe, bourdon tube or elastic force steel pipe.
The cross section of said inner sucking pipe is circular or oval.
A kind of controlling method of duplex-cylinder rotary compressor is characterized in that will suck gas through the increment device is set in suction port branches to first cylinder and second cylinder.
The ratio of the circulation area through changing circulation area and gap in the inner sucking pipe, control is toward the shunt volume of the suction gas of first cylinder and second cylinder.
Among the present invention; The split point of the gas that sucks from outside sucking pipe is at the opening of inner sucking pipe 27 in outside sucking pipe; Therefore can be regarded as two cylinder chambers constitutes independently gas introduction tube respectively; Thereby distance between first cylinder chamber that can extend inlet and second cylinder chamber inlet has solved in the past the interference problem that sucks gas in two cylinders.
Technological scheme disclosed by the invention can import in the industry simply, and realizes producing in batches.
That the present invention has is simple and reasonable, flexible operation, fabricating cost is low, shunting effect good and refrigerating efficiency is high characteristics.
Description of drawings
Fig. 1 is the broken section structural representation of the two-cylinder type rotary compressor of existing single suction tracheae.
Fig. 2 is the structural representation of the embodiment of the invention 1.
Fig. 3 is the broken section structure for amplifying schematic representation of the compressing mechanism in the embodiment of the invention 1.
Fig. 4 is the perspective view of inner sucking pipe.
Fig. 5 for the Y-Y among Fig. 3 to analysing and observe the structure for amplifying schematic representation.
Structural representation when Fig. 6 is the inside sucking pipe biasing among Fig. 5.
Fig. 7 is the broken section structure for amplifying schematic representation of the compressing mechanism in the embodiment of the invention 2.
Among the figure: 1 is duplex-cylinder rotary compressor, and 2 is housing, and 3 is outlet pipe, and 4 is condenser, and 5 is expansion valve, and 6 is vaporizer; 7 is liquid-storage container, and 8 is outside sucking pipe, and 11 is compressing mechanism, and 12 is motor, and 13a is first cylinder, and 13b is second cylinder; 14 is central diaphragm, and 15a is first cylinder chamber, and 15b is second cylinder chamber, and 16a is a first piston, and 16b is second piston, and 21 is main bearing; 22 is supplementary bearing, and 23 is last baffler, and 24 is bottom silencer, and 25 is eccentric crankshaft, and 26 is suction port, and 27 is inner sucking pipe; 31 is the gap, and 32 is the gas passageway, and 33 is gas port, and 34a is first cylinder chamber inlet, and 34b is second cylinder chamber inlet.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further described.
Embodiment 1
Referring to Fig. 2, shown the summary and the freeze cycle of the internal structure of duplex-cylinder rotary compressor 1.The internal pressure of closed shell 2 is a high side pressure, and the pressurized gas of discharging from outlet pipe 3 become low-pressure gas through behind condenser 4, expansion valve 5 and the vaporizer 6, and arrival is installed in the liquid-storage container 7 on the housing 2.Then, the gas that sucks from outside sucking pipe 8 after being compressed, is discharged to the inside of housing 2 through the first cylinder 13a and the second cylinder 13b from compressing mechanism 11.
Referring to Fig. 3, duplex-cylinder rotary compressor 1 has disposed compressing mechanism 11 in the bottom of housing 2, has disposed motor 12 on the top of housing 2, and motor 12 joins with compressing mechanism 11.The outer wall of compressing mechanism 11 and motor 12 is fixed on the inwall of housing 2.
The bottom of the top of the first cylinder 13a and the second cylinder 13b has disposed main bearing 21 and supplementary bearing 22 respectively.Be used to support on main bearing 21 and the supplementary bearing 22 of eccentric crankshaft 25 and have last baffler 23 and bottom silencer 24 respectively, in the internal configurations of last baffler 23 and bottom silencer 24 venting gas appliance (not having diagram).Eccentric crankshaft 25 contacts with the inwall slide relative of main bearing 21 and supplementary bearing 22, and two eccentric parts of eccentric crankshaft 25 carry out eccentric drive to each piston respectively.
An end that is welded in the outside sucking pipe 8 of housing 2 sides is connected in the suction port 26 that is arranged on the first cylinder 13a side, and the other end of outside sucking pipe 8 is connected on the liquid-storage container 7.Be provided with the increment device of distance between lengthening first cylinder chamber inlet 34a and second cylinder chamber inlet 34b in the suction port 26.
In the present embodiment; The increment device comprises the inside sucking pipe 27 that inserts in the suction port 26; One end opening of this inside sucking pipe 27 is in outside sucking pipe 8; The other end of inner sucking pipe 27 communicates with first cylinder chamber inlet 34a, forms gap 31, the first cylinder 13a between the inwall of the outer wall of inner sucking pipe 27 and suction port 26 and is provided with gas port 33; The central diaphragm 14 and the second cylinder 13b are provided with gas passageway 32, and gap 31 is communicated with second cylinder chamber inlet 34b through gas port 33, gas passageway 32.Consequently; Through in the first piston 16a of the inner rotation of the first cylinder chamber 15a and the second cylinder chamber 15b and the effect of the second piston 16b; Be drawn into of the inlet shunting of the suction gas of suction port 26 at inner sucking pipe 27 from outside sucking pipe 8; A part gets into inner sucking pipe 27, and another part gets into gap 31, flows to the first cylinder chamber 15a and the second cylinder chamber 15b respectively.Gap 31 in the present embodiment is a loop configuration.
So, through perforate being installed in the inside sucking pipe 27 of the first cylinder chamber 15a, the distance between first cylinder chamber that can extend inlet 34a and second cylinder chamber inlet 34b.The effect of inner sucking pipe 27 is to import to the ingress pipe in the first cylinder chamber 15a with sucking gas, from the gap 31 be communicated with the second cylinder chamber 15b via gas port 33 the loop can regard as and import to the ingress pipe of the second cylinder chamber 15b sucking gas.That is to say that the gas that sucks from an outside sucking pipe 8 flows to respectively in the first cylinder chamber 15a and the second cylinder chamber 15b through two gas introduction tubes independently.At this, the pressurized gas of each Piston Compression are discharged to the enclosure interior of compressor via last baffler 23 and bottom silencer 24 from discharge valve apparatus.
As stated; Effect through inner sucking pipe 27; Distance between first cylinder chamber inlet 33a and second cylinder chamber inlet is elongated; And suck gas and flow in each cylinder chamber via two ingress pipes independently, thereby can solve two cylinders: the interference problem of the suction gas that the first cylinder 13a and the second cylinder 13b produce.Consequently can improve the gettering efficiency of each cylinder chamber, the loss of refrigerating capacity and running efficiency can effectively prevent.
Through adopting the method for inner sucking pipe 27 that kind; Connect the method that is used for air-breathing ingress pipe and be not limited to above-mentioned formation for respectively first cylinder chamber inlet 34a and second cylinder chamber inlet 34b, can certainly in the scope of purport of the present invention, do various distortion.
Referring to Fig. 4, be the details of inner sucking pipe 27.Inner sucking pipe 27 general employing wall thickness are that steel pipe, elastic force steel pipe or the line about 0.3mm directly constitutes for the closely knit bourdon tube about 0.5mm.Inner sucking pipe 27 usefulness are pressed into first cylinder chamber method such as 34a that enters the mouth and fix.The cross section of inner sucking pipe 27 is circular or oval.
Referring to Fig. 5; The external diameter of inner sucking pipe 27 is d; The internal diameter of suction port 26 is D, and the sectional area of inner sucking pipe 27 is A=π * d*d/4, and the outer wall of inner sucking pipe 27 is B=π * (D*D-d*d)/4 with the sectional area in the gap 31 that forms between the inwall of suction port 26.But this result of calculation has been ignored the wall thickness of inner sucking pipe 27.
In present embodiment 1, because the discharge capacity of two cylinders is equal, thus as the reference value that designs, A=B, the sectional area of this moment is circulation area just, and the circulation area in the promptly inner sucking pipe 27 equates with the circulation area in gap 31.Perhaps, consider the crooked drag loss of gas port 33 etc., make B be a bit larger tham A, just, the circulation area in the inner sucking pipe 27 and the circulation area in gap 31 are unequal.
For the center of suction port 26 and the center of inner sucking pipe 27, both can Fig. 5 be seen in its coaxial setting; Also can be with respect to the center of suction port 26; Can be setovered in the center of inner sucking pipe 27, just staggered each other in above-mentioned two centers, see Fig. 6; Thereby can enlarge the access of gas port 33, improve gas flow effect towards the second cylinder chamber 15b.
Referring to Fig. 7,, reduced the discharge capacity of the second cylinder 13b with respect to the discharge capacity of the first cylinder 13a.In embodiment 1, be that the outer wall with the first cylinder 13a is fixed on the inwall of housing 2, and in present embodiment 2, be the outer wall with main bearing 21 is fixed on the inwall of housing 2.So, in the present embodiment, for the little design of the second cylinder 13b discharge capacity, the area of sectional area B must be less than sectional area A, and will optimize this two areas.
All the other are not stated part and see embodiment 1, no longer repeat.
Claims (10)
1. duplex-cylinder rotary compressor; The internal pressure of closed shell (2) is a high side pressure; The compressing mechanism (11) that is provided with motor (12) in the housing (2) and joins with motor (12); Compressing mechanism (11) comprises the central diaphragm (14) that is used to divide first cylinder (13a) and second cylinder (13b); Be used to support the main bearing (21) of eccentric crankshaft (25) and the side that supplementary bearing (22) is separately positioned on first cylinder (13a) and second cylinder (13b); First cylinder (13a) is provided with first cylinder chamber inlet (34a), and second cylinder (13b) is provided with second cylinder chamber inlet (34b), it is characterized in that first cylinder (13a) or second cylinder (13b) are provided with suction port (26); One end of outside sucking pipe (8) communicates with suction port (26), is provided with the increment device of distance between lengthening first cylinder chamber inlet (34a) and second cylinder chamber inlet (34b) in the suction port (26).
2. duplex-cylinder rotary compressor according to claim 1; It is characterized in that said increment device comprises the inside sucking pipe (27) that inserts in the suction port (26); One end opening of this inside sucking pipe (27) is in outside sucking pipe (8); The other end of inner sucking pipe (27) and first cylinder chamber enter the mouth (34a) communicate, form gap (31) between the inwall of the outer wall of inner sucking pipe (27) and suction port (26), first cylinder (13a) is provided with gas port (33); Central diaphragm (14) and second cylinder (13b) are provided with gas passageway (32), and gap (31) are communicated with second cylinder chamber inlet (34b) through gas port (33), gas passageway (32);
Perhaps; Said increment device comprises the inside sucking pipe (27) that inserts in the suction port (26); One end opening of this inside sucking pipe (27) is in outside sucking pipe (8); The other end of inner sucking pipe (27) and second cylinder chamber enter the mouth (34b) communicate, form gap (31) between the inwall of the outer wall of inner sucking pipe (27) and suction port (26), second cylinder (13b) is provided with gas port (33); Central diaphragm (14) and first cylinder (13a) are provided with gas passageway (32), and gap (31) are communicated with first cylinder chamber inlet (34a) through gas port (33), gas passageway (32).
3. duplex-cylinder rotary compressor according to claim 2 is characterized in that the circulation area in the said inner sucking pipe (27) equates with the circulation area of gap (31).
4. duplex-cylinder rotary compressor according to claim 2 is characterized in that the circulation area of circulation area and gap (31) in the said inner sucking pipe (27) is unequal.
5. duplex-cylinder rotary compressor according to claim 2 is characterized in that the center of said suction port (26) and the coaxial setting in center of inner sucking pipe (27).
6. duplex-cylinder rotary compressor according to claim 2 is characterized in that the center of said suction port (26) and the center-biased of inner sucking pipe (27).
7. according to the arbitrary described duplex-cylinder rotary compressor of claim 1 to 6, it is characterized in that said inner sucking pipe (27) is steel pipe, bourdon tube or elastic force steel pipe.
8. duplex-cylinder rotary compressor according to claim 8, the cross section that it is characterized in that said inner sucking pipe (27) is for circular or oval.
9. the controlling method of a duplex-cylinder rotary compressor as claimed in claim 1 is characterized in that will suck gas through in suction port (26), the increment device being set branches to first cylinder (13a) and second cylinder (13b).
10. the controlling method of duplex-cylinder rotary compressor according to claim 9; It is characterized in that control is toward the shunt volume of the suction gas of first cylinder (13a) and second cylinder (13b) through the ratio of the circulation area that changes the interior circulation area of inner sucking pipe (27) and gap (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2011100448141A CN102644593A (en) | 2011-02-16 | 2011-02-16 | Double-cylinder rotary compressor and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011100448141A CN102644593A (en) | 2011-02-16 | 2011-02-16 | Double-cylinder rotary compressor and control method thereof |
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| CN102644593A true CN102644593A (en) | 2012-08-22 |
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| CN2011100448141A Pending CN102644593A (en) | 2011-02-16 | 2011-02-16 | Double-cylinder rotary compressor and control method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113357149A (en) * | 2021-06-25 | 2021-09-07 | 广东美芝制冷设备有限公司 | Compression assembly for compressor and rotary compressor |
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| JPH09250477A (en) * | 1996-03-18 | 1997-09-22 | Toshiba Corp | Rotary compressor |
| JPH10213087A (en) * | 1997-01-30 | 1998-08-11 | Toshiba Corp | Rotary compressor |
| CN101012831A (en) * | 2007-01-29 | 2007-08-08 | 西安庆安制冷设备股份有限公司 | Rotor type twin cylinder compressor taking air-breathing through partition board |
| JP2009032931A (en) * | 2007-07-27 | 2009-02-12 | Sharp Corp | Inspecting apparatus of semiconductor laser |
| CN101387298A (en) * | 2007-08-28 | 2009-03-18 | 东芝开利株式会社 | Double cylinders rotary compressor and freezing cycle device using the same |
| JP2009062930A (en) * | 2007-09-07 | 2009-03-26 | Toshiba Carrier Corp | Two-cylinder rotary compressor and refrigerating cycle device |
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2011
- 2011-02-16 CN CN2011100448141A patent/CN102644593A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09250477A (en) * | 1996-03-18 | 1997-09-22 | Toshiba Corp | Rotary compressor |
| JPH10213087A (en) * | 1997-01-30 | 1998-08-11 | Toshiba Corp | Rotary compressor |
| CN101012831A (en) * | 2007-01-29 | 2007-08-08 | 西安庆安制冷设备股份有限公司 | Rotor type twin cylinder compressor taking air-breathing through partition board |
| JP2009032931A (en) * | 2007-07-27 | 2009-02-12 | Sharp Corp | Inspecting apparatus of semiconductor laser |
| CN101387298A (en) * | 2007-08-28 | 2009-03-18 | 东芝开利株式会社 | Double cylinders rotary compressor and freezing cycle device using the same |
| JP2009062930A (en) * | 2007-09-07 | 2009-03-26 | Toshiba Carrier Corp | Two-cylinder rotary compressor and refrigerating cycle device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113357149A (en) * | 2021-06-25 | 2021-09-07 | 广东美芝制冷设备有限公司 | Compression assembly for compressor and rotary compressor |
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Application publication date: 20120822 |