CN201193614Y

CN201193614Y - Air-intake mechanism of rotary compressor cylinder

Info

Publication number: CN201193614Y
Application number: CNU2008200443847U
Authority: CN
Inventors: 李旺宏; 高永红; 陈迪松
Original assignee: Zhuhai Meiulingda Refrigeration Technology Co Ltd; Gree Electric Appliances Inc of Zhuhai; Zhuhai Landa Compressor Co Ltd
Current assignee: Zhuhai Meiulingda Refrigeration Technology Co Ltd; Gree Electric Appliances Inc of Zhuhai; Zhuhai Landa Compressor Co Ltd
Priority date: 2008-02-29
Filing date: 2008-02-29
Publication date: 2009-02-11
Anticipated expiration: 2018-02-28

Abstract

The utility model relates to a rotary compressor, in particular to an air inlet mechanism of a cylinder of a rotary compressor. The air inlet mechanism comprises an inlet channel which is radially arranged on the cylinder and which communicates the inside and outside of the cylinder. Wherein, the horizontal width of the air inlet of the inlet channel on the internal wall of the cylinder is smaller than the longitudinal width; specifically, two longitudinal ends are rectangular air inlets with round heads. Compared with the prior art, the utility model has the advantages that the longitudinal width of the rectangular inlets with round heads is larger than the diameter of the present standard round ports; under the condition of ensuring no change of the area of the air inlet, the horizontal width of the rectangular air inlets with round heads can be smaller than the diameter of the present standard round ports, and that is to say, the included angle of the two horizontal ends is smaller, thus increasing the maximum volume of the suction cavity of the cylinder and improving the efficiency of the compressor. In addition, compared with standard rectangles or ovals, the rectangular inlets with round heads are more easily processed.

Description

The admission gear of rotary compressor cylinder

Technical field

The utility model relates to rotary compressor, relates in particular to the admission gear of rotary compressor cylinder.

Background technique

Rotary compressor generally comprises closed shell, cylinder, upper bearing (metal), lower bearing, bent axle, motor, slide plate, rolls ring etc.Closed shell is provided with sucking pipe and outlet pipe, cylinder is arranged in the closed shell, on, lower bearing is placed on the cylinder, following two ends, offer intakeport and relief opening on the cylinder, rolling ring is contained on the eccentric crankshaft, rolling ring during work rolls along cylinder inner wall, slide plate is installed in the vane slot of offering on the cylinder, when rolling ring and in active chamber, roll, slide plate its front end under the effect of spring keeps encircling cylindrical and closely contacting with rolling, thereby slide plate and roll ring and cylinder inner cavity is divided into air aspiration cavity and compression chamber two-part with the point of contact of cylinder inner wall, the volume size of air aspiration cavity and compression chamber is along with rolling the ring rotation and changing, the pressure of compression intracavity gas then reduces along with compression chamber and increases, thereby finishes the working procedure of compressor.

Figure 1 shows that a kind of axial of existing rotary compressor cylinder, this cylinder is provided with vane slot 13, vane slot 13 both sides offer gas-entered passageway 11 and air outlet 12, slide plate 17 becomes air aspiration cavity 1 and compression chamber 2 with the volume separation in the cylinder, gas-entered passageway 11 is a radial direction through hole, to be communicated with inside and outside the cylinder, the suction port 111a of this gas-entered passageway on cylinder inner wall is standard circular, referring to Fig. 2.The low-temp low-pressure gaseous coolant that comes from evaporator drier enters the gas-entered passageway 11 of cylinder by sucking pipe, and enters cylinder 14 by inwall suction port 111a, is compressed into the High Temperature High Pressure gaseous coolant afterwards, is discharged by air outlet 12.

During compressor operating, the ring 15 that rolls that is eccentrically set in the cylinder is rotated counterclockwise in cylinder along the diagram direction of arrow by bent axle 16 drivings, for each stroke of compressing mechanism (promptly roll ring 15 whenever revolve turn around), roll ring 15 with from the edge B that leaves inwall suction port 111a to arrive the B point during this period of time next time, cylinder air aspiration cavity 1 is connected with gas-entered passageway 11, and the low-temp low-pressure gaseous coolant enters cylinder air aspiration cavity 1 by the inwall suction port; Air aspiration cavity 1 volume rolls along cylinder inner wall with rolling ring 15, and volume constantly changes.Roll a circle when contacting with the edge B of inwall suction port 111a once more when rolling ring 15, and cylinder air aspiration cavity 1 is closed, and compressor starts is compressed the low-temp low-pressure refrigerant that enters the cylinder air aspiration cavity.As can be seen, cylinder air aspiration cavity maximum volume is:

In the following formula: V: the maximum volume of cylinder air aspiration cavity

α: the pairing cylinder central angle of the edge A of suction port 11 and edge B

R: the radius of cylinder

H: the height of cylinder

By formula (1) as can be known, the α angle is big more, and the maximum volume of cylinder air aspiration cavity is more little, and promptly the low-temp low-pressure gaseous coolant of each stroke suction is few more, and compressor efficiency is low more.

So, the shortcoming of the admission gear of rotary compressor cylinder is among Fig. 1: gas-entered passageway adopts standard circular (as Fig. 2) at the suction port 111a of cylinder surfaces, though be easy to processing, but its horizontal width is bigger, promptly corresponding above-mentioned α angle is bigger, and the low-temp low-pressure gaseous coolant that causes sucking the cylinder air aspiration cavity is also less.

In order to address the aforementioned drawbacks, the admission gear of a kind of air conditioner with rotary compressor cylinder disclosed in the application for a patent for invention that China is CN1601092 number, as shown in Figure 6, comprise radial air inlet mouth 5, also comprise vertical air flue 3 and rectangular air inlet 4, described radial air inlet mouth 5 is a circular hole that radially forms at cylinder outer wall upper edge cylinder, described vertical air flue 3 is a through hole in the perforation cylinder both ends of the surface of cylinder wall upper edge cylinder axial direction formation, described rectangular air inlet 4 is a rectangular opening that forms on cylinder inner wall, the outer end of radial air inlet mouth 5 is connected with the suction tude of compressor, inner and vertical air flue 3 one sides are connected, described vertical air flue 3 opposite sides are connected with rectangular air inlet 4, and rectangular air inlet 4 makes vertical air flue 3 and compresser cylinder intracavity inter-connection.In the above-mentioned technology, described rectangular air inlet 4 substantially horizontals are narrow, vertical direction is long, so both can reduce the α angle of suction port correspondence, can guarantee that the area of its area and standard circular suction port is suitable, the unlikely flow that influences the low-temp low-pressure gaseous coolant simultaneously.But the setting of described vertical air flue 3 is for the ease of processing rectangular air inlet 4, thereby has increased operation than conventional production; The processing request precision height of rectangular opening itself, consuming time of a specified duration influences manufacturing efficiency in addition; And, because this vertical air flue 3 connects the cylinder lower end surface,, cause gas leakage easily to having relatively high expectations of assembling, can reduce compressor efficiency.

The model utility content

The utility model provides a kind of admission gear of rotary compressor cylinder at the defective of prior art, makes cylinder have bigger air aspiration cavity maximum volume, and easy processing, can not produce gas leakage, can fully improve the efficient of compressor.

Above-mentioned purpose is achieved through the following technical solutions:

A kind of admission gear of rotary compressor cylinder, comprise the gas-entered passageway of radially offering on the cylinder, will be communicated with inside and outside the cylinder, it is characterized in that, the suction port of described gas-entered passageway on cylinder inner wall is that vertical two ends are the rectangular air inlet of round end, and its horizontal width is less than vertical width.

The utility model is than the beneficial effect of prior art, vertical width of round end rectangular air inlet is big than the diameter of existing standard circular port, guaranteeing under the constant situation of suction port area, the horizontal width of round end rectangular air inlet can be smaller than the diameter of existing standard circular port, the angle that is transverse ends is smaller, thereby increased the maximum volume of cylinder air aspiration cavity, improved the efficient of compressor.In addition, round end rectangular air inlet and standard rectangular or relatively oval are easier to processing.

Description of drawings

Fig. 1 is the axial of existing rotary compressor cylinder;

Fig. 2 is the radial view of existing rotary compressor cylinder inwall suction port;

The axial of the compresser cylinder that provides in the embodiment is provided Fig. 3;

The radial view of the compresser cylinder inwall suction port that provides in the embodiment is provided Fig. 4;

Fig. 5 is the schematic representation that the utility model and prior art are made comparisons;

Fig. 6 be in the Chinese CN1601092 number application for a patent for invention disclosed air conditioner with the schematic cross-sectional view of the admission gear of rotary compressor cylinder.

Description of reference numerals is as follows: 1. air aspiration cavity; 2. compression chamber, 3. vertical air flue, 4. rectangular air inlet, 5. radial air inlet mouth, 11. gas-entered passageways, 111. round end rectangular air inlet, the 111a. suction port, 12. cylinder air outlets, 13. vane slots, 14. cylinders, 15. roll ring, 16. bent axles, 17. slide plates.

Embodiment

Please in conjunction with consulting Fig. 3 and Fig. 4, the admission gear of the rotary compressor cylinder that present embodiment provides, comprise the gas-entered passageway of radially offering on the cylinder 14 11, gas-entered passageway 11 is with 14 inside and outside connections of cylinder, the horizontal width of the suction port 111 of described gas-entered passageway 11 on cylinder inner wall is less than vertical width, be specially the rectangular air inlet that vertical two ends are round end (being called for short the round end rectangular air inlet) referring to Fig. 4.

Working procedure to the admission gear of present embodiment rotary compressor cylinder is illustrated below:

As shown in Figure 3, during compressor operating, the low-temp low-pressure gaseous coolant that comes from evaporator drier enters in the compresser cylinder 14 then successively by sucking pipe (not marking among the figure), radial air inlet passage 11 and round end rectangular air inlet 111; Meanwhile, the rolling ring 15 that is eccentrically set in the cylinder rotates in cylinder along the direction of arrow shown in Figure 3, for each stroke of compressing mechanism (promptly roll ring 15 whenever revolve turn around), from the edge D that leaves round end rectangular air inlet 111 to arrive the D point during this period of time next time, the cylinder air aspiration cavity is connected with round end rectangular air inlet 111, and the low-temp low-pressure gaseous coolant enters the air aspiration cavity of cylinder 14 by round end rectangular air inlet 111; When rolling ring 15 and contact with the edge D of round end rectangular air inlet 111, the cylinder air aspiration cavity is closed, and compressor starts is compressed the low-temp low-pressure refrigerant that enters the cylinder air aspiration cavity.

See also Fig. 5, above-mentioned air conditioner exists with the advantage applies of the admission gear of rotary compressor cylinder:

The width of round end rectangular air inlet 111 can relative narrower, thereby makes pairing central angle less (β is less than α as shown in Figure 5) between the edge C of round end rectangular air inlet 111 and the edge D.According to the formula that provides in the background technique (1) as can be known: institute is more little to deserved central angle between edge C and the edge D, air aspiration cavity sealing more early, the volume of loss is more little, the actual volume of cylinder air aspiration cavity is just big more.In addition, the width of round end rectangular air inlet 111 is narrower, but its length can suitably extend, and therefore can make the sectional area of round end rectangular air inlet 111 keep higher value, that is to say that the gettering quantity that guarantees each stroke reaches higher value, thereby improve the efficient of compressor.In addition, round end rectangular air inlet 111 is easy to processing, and is easy to operate, can make a call to a circular hole with drill bit earlier, and again drill bit vertically being spurred certain distance can form, and also can mill out this hole with milling cutter.

Claims

1. the admission gear of a rotary compressor cylinder, comprise the gas-entered passageway of radially offering on the cylinder, will be communicated with inside and outside the cylinder, it is characterized in that, the suction port of described gas-entered passageway on cylinder inner wall is that vertical two ends are the rectangular air inlet of round end, and its horizontal width is less than vertical width.