CN216077590U - Refrigerant discharge structure of rotary compressor - Google Patents
Refrigerant discharge structure of rotary compressor Download PDFInfo
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- CN216077590U CN216077590U CN202122870933.4U CN202122870933U CN216077590U CN 216077590 U CN216077590 U CN 216077590U CN 202122870933 U CN202122870933 U CN 202122870933U CN 216077590 U CN216077590 U CN 216077590U
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Abstract
The utility model provides a refrigerant discharge structure of a rotary compressor, and belongs to the technical field of compressors. The rotary compressor solves the problems that when the existing rotary compressor adopts a reed type exhaust valve, the dead volume is large, and the energy efficiency ratio is influenced. The refrigerant discharge structure of the rotary compressor comprises a discharge main channel positioned on a cylinder cover and a discharge chamfer channel positioned on a cylinder, wherein the discharge chamfer channel is communicated with the discharge main channel; the cylinder cover is provided with a reed type exhaust valve which can enable the main exhaust channel to be in a cut-off state; the discharge main channel is characterized by being waist-shaped, and comprises a strip-shaped columnar area positioned in the middle and semi-cylindrical areas positioned on two sides of the strip-shaped area. The rotary compressor not only reduces the dead volume by adjusting the shape of the discharge main channel, but also ensures the processing convenience of the discharge main channel and the discharge chamfer channel.
Description
Technical Field
The utility model belongs to the technical field of compressors, relates to a rotary compressor, and particularly relates to a refrigerant discharge structure of the rotary compressor.
Background
The rotary compressor is a motor which directly drives a rotary piston to rotate so as to complete the compression of refrigerant vapor. Because the piston rotates, the compression work is smooth and stable and balanced, and in addition, the rotary air compressor has no clearance volume and no interference of re-expansion gas, thereby having the advantages of high compression efficiency, few parts, small volume, light weight, good balance performance, low noise, complete protection measures, low power consumption and the like.
When the rotary compressor is operated, the motor drives the crankshaft to rotate, and the piston sleeved on the eccentric part of the crankshaft rolls and moves in a plane along the inner hole wall of the cylinder. Under the action of the elastic force of the spring, the R surface of the blade contacts with the excircle of the piston and divides the inner cavity of the cylinder into a compression cavity and a suction cavity. The volume of the suction cavity is gradually enlarged along with the rotation and the movement of the piston, and low-pressure refrigerants are sucked; meanwhile, the volume in the compression cavity is reduced, the pressure of the refrigerant in the compression cavity is gradually increased, when the piston rotates to 330 degrees, the pressure of the refrigerant in the compression cavity reaches the maximum value, the exhaust valve is opened, and the high-pressure refrigerant is discharged, so that one working cycle is completed.
A main discharge channel is formed in a cylinder cover of the rotary compressor, and a discharge chamfer channel is formed in a cylinder; at present, the discharge main channel and the discharge chamfer channel are both cylindrical, and the capacity of compressing the refrigerant in the discharge main channel and the discharge chamfer channel by the pressure is generally regarded as consumption and does useless work. Taking a cylinder with an internal brakweed of 39mm and a rotary compressor discharging 5.5mm from the main road brakweed as an example, when the piston rotates to 330 degrees, the compression chamber is in the shape of a long and narrow arc triangle, and the volume of the compression chamber is about 108.2mm for cultivation; the total volume of discharge main channel and discharge chamfer channel was approximately 47.5mm thick headed by thin section. The total volume of the discharge main channel and the discharge chamfer channel is about half of the volume of the compression cavity, so that the refrigerant in the compression discharge main channel and the discharge chamfer channel occupies larger energy consumption. In order to solve the above-described problems, a hermetic rotary compressor (publication No. CN 1566700A) has been proposed to reduce the dead volume and improve the performance of the compressor.
Along with social development, the requirements on energy conservation and consumption reduction of the air conditioner are higher and higher; therefore, the novel refrigerant is continuously popularized and applied, and the output working pressure of the compressor is also continuously improved. Had the output working pressure of the current partial compressor increased to 26-28Kg/cm, even exceeding 40 Kg/cm.
Whether the technical scheme described in the sealed rotary compressor (publication number CN 1566700A) is applicable to the rotary compressor with the working pressure exceeding 26Kg/cm needs to be verified. Although the reed type exhaust valve is widely used, the dead volume cannot be reduced when the reed type exhaust valve is adopted, and therefore the energy efficiency ratio of the compressor cannot be reduced, and the performance of the compressor cannot be improved.
Disclosure of Invention
The utility model provides a refrigerant discharge structure of a rotary compressor, and aims to solve the technical problem of how to improve the energy efficiency ratio of the compressor.
The technical problem to be solved by the utility model can be realized by the following technical scheme: a rotary compressor comprises an air cylinder and a cylinder cover, wherein a refrigerant discharge structure of the rotary compressor comprises a main discharge channel positioned on the cylinder cover and a chamfer discharge channel positioned on the air cylinder, and the chamfer discharge channel is communicated with the main discharge channel; the cylinder cover is provided with a reed type exhaust valve which can enable the main exhaust channel to be in a cut-off state; the discharge main channel is characterized by being waist-shaped, and comprises a strip-shaped columnar area positioned in the middle and semi-cylindrical areas positioned on two sides of the strip-shaped area.
Compared with the prior art, the rotary compressor not only reduces the dead volume by adjusting the shape of the discharge main channel, but also ensures the processing convenience of the discharge main channel and the discharge chamfer channel.
In the refrigerant discharge structure of the rotary compressor, a cylindrical cavity and an air inlet channel communicated with the cavity are further arranged in the cylinder, a crankshaft and a piston are arranged in the cavity, and the piston is sleeved on an eccentric part of the crankshaft; the air cylinder is connected with the blades in a sliding mode, and the air inlet channel and the discharge chamfer angle channel are located on two sides of each blade respectively.
Preferably, the strip-shaped columnar area is also arc-shaped.
Preferably, the circle center of the arc line of the strip-shaped columnar area coincides with the axis of the cylinder cavity.
Preferably, the minimum clearance between the side of the semi-cylindrical area of the discharge main channel and the side of the vane is less than 0.2 mm.
Preferably, the discharge chamfer passage has the same cross-sectional shape as the discharge main passage.
Preferably, the longitudinal line of the discharge chamfer passage is arranged obliquely relative to the axial line of the cylinder chamber, and the angle alpha between the longitudinal line of the discharge chamfer passage and the axial line of the cylinder chamber is 30-38 degrees.
Preferably, the radius R1 of the semi-cylindrical region of the main discharge channel is 27% to 37% of the arc length L1 of the central arc of the main discharge channel.
Preferably, the discharge main passage has a central arc length L1 that is less than or equal to the diameter of a cylindrical discharge main passage in prior rotary compressors.
Drawings
Fig. 1 is a schematic sectional view of a rotary compressor.
Fig. 2 is a sectional view schematically showing a cylinder in the rotary compressor.
FIG. 3 is a schematic cross-sectional view of the main discharge passage.
In the figure, 1, cylinder; 1a, an air inlet channel; 1b, discharging the chamfer channel; 2. a cylinder cover; 2a, a main discharge channel; 2a1, bar-shaped columnar areas; 2a2, semi-cylindrical region; 3. a crankshaft; 4. a piston; 5. a blade; 6. reed type exhaust valve.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.
As shown in fig. 1 and 2, the rotary compressor includes a cylinder 1, a cylinder head 2, a crankshaft 3, a piston 4, and a vane 5.
The cylinder 1 has a cylindrical chamber therein and an intake passage 1a communicating with the chamber. Crankshaft 3 wears to establish in 1 cavity of cylinder, and the cover is equipped with piston 4 on crankshaft 3's the eccentric portion, only leaves the clearance that is less than 0.1mm usually between the lateral surface of piston 4 and the medial surface of cylinder 1, not only avoids the outer disc of piston 4 and the medial surface friction of cylinder 1, can guarantee the leakproofness again. The blade 5 is embedded in a blade 5 sliding groove of the cylinder 1, the blade 5 is in sliding connection with the cylinder 1, and the blade 5 always abuts against the outer side surface of the piston 4 under the action of the elastic force of the spring.
The refrigerant discharge structure of the rotary compressor comprises a discharge main channel 2a positioned on a cylinder cover 2, a discharge chamfer channel 1b positioned on a cylinder 1 and a reed type exhaust valve 6 arranged on the cylinder cover 2, wherein the reed type exhaust valve 6 can enable the discharge main channel 2a to be in a stop state. The reed type exhaust valve 6 can refer to the technical solution described in the background of the sealed rotary compressor (publication No. CN 1566700A). The intake passage 1a and the discharge chamfer passage 1b are respectively located on both sides of the vane chute. The inner end inside area of the discharge main passage 2a communicates directly with the chamber of the cylinder 1, and the inner end outside area of the discharge main passage 2a communicates with the chamber of the cylinder 1 through the discharge chamfer passage 1 b.
As shown in fig. 2 and 3, the discharge main passage 2a is kidney-shaped, i.e., the discharge main passage 2a includes a strip-shaped columnar area 2a1 in the middle and semi-columnar areas 2a2 on both sides of the strip-shaped area. The strip-shaped columnar area 2a1 is also arc-shaped, the center of the arc coincides with the axis of the cavity of the cylinder 1, so that the width of the strip-shaped columnar area 2a1 directly communicated with the cavity of the cylinder 1 along the circumferential direction of the cavity of the cylinder 1 is kept consistent, and the stability of the discharge flow of the refrigerant is further ensured. When the cylinder head 2 is machined, the milling cutter moves along the set arc-shaped trajectory line to machine the discharge main channel 2a, so that the machining is convenient, the machining efficiency is high, and the machining cost is low. The minimum clearance between the side of the semi-cylindrical area 2a2 of the discharge main channel 2a and the side of the vane is less than 0.2 mm.
The discharge chamfer passage 1b and the discharge main passage 2a have the same cross-sectional shape, which facilitates the machining of the discharge chamfer passage 1b and the discharge main passage 2a and reduces the cost required for the machining. The longitudinal line of the discharge chamfer channel 1b is obliquely arranged relative to the axial lead of the cavity of the cylinder 1, and the included angle alpha between the longitudinal line of the discharge chamfer channel 1b and the axial lead of the cavity of the cylinder 1 is 30-38 degrees, so that the relation between the discharge flow of the refrigerant and the volume of the discharge chamfer channel 1b can be effectively balanced, the flow required by the discharge of the refrigerant can be ensured, and the discharge chamfer channel 1b has the advantage of small volume.
In order to compare the conventional rotary compressor measuring 39mm on its inner periphery on a cylinder 1 and 5.5mm on its main exhaust channel 2a, the depth of the main exhaust channel 2a is set to 2mm and the arc length L1 of the central arc of the main exhaust channel 2a is set to 5.5 mm.
| Serial number | Semi-cylindrical region 2a2 radius R1 | The total volume of the discharge main channel 2a and the discharge chamfer channel 1b | Difference value of the volume of the existing design | Estimated energy saving% |
| 1 | 2.05 | 37.9 | 9.6 | 6.02 |
| 2 | 1.75 | 33.2 | 14.3 | 8.92 |
| 3 | 1.5 | 29.1 | 18.4 | 11.49 |
Summarizing, the arc length of the central arc line of the main discharge channel 2a in the rotary compressor is the same as the diameter of the main discharge channel 2a in the existing rotary compressor, so that the limit positions of the side surfaces of the main discharge channel 2a along the circumferential direction of the cavity of the cylinder 1 can be kept consistent, and the smoothness of refrigerant discharge is further ensured, and meanwhile, the total volume of the main discharge channel 2a and the chamfer discharge channel 1b is reduced by adjusting the cross sectional shapes of the main discharge channel 2a and the chamfer discharge channel 1b, namely the dead volume is reduced.
Claims (10)
1. A rotary compressor refrigerant discharge structure comprises an air cylinder (1) and a cylinder cover (2), the rotary compressor refrigerant discharge structure comprises a discharge main channel (2 a) positioned on the cylinder cover (2) and a discharge chamfer channel (1 b) positioned on the air cylinder (1), and the discharge chamfer channel (1 b) is communicated with the discharge main channel (2 a); a reed type exhaust valve (6) which can enable the main exhaust channel (2 a) to be in a cut-off state is arranged on the cylinder cover (2); the discharge main channel (2 a) is waist-shaped, and the discharge main channel (2 a) comprises a strip-shaped cylindrical area (2 a 1) positioned in the middle and semi-cylindrical areas (2 a 2) positioned on two sides of the strip-shaped area.
2. The refrigerant discharge structure of the rotary compressor as claimed in claim 1, wherein the cylinder (1) further has a cylindrical chamber and an air inlet channel (1 a) communicated with the chamber, a crankshaft (3) and a piston (4) are disposed in the chamber, and the piston (4) is sleeved on the eccentric portion of the crankshaft (3); the air cylinder (1) is connected with the blade (5) in a sliding mode, and the air inlet channel (1 a) and the discharge chamfer channel (1 b) are located on two sides of the blade (5) respectively.
3. The refrigerant discharge structure of the rotary compressor according to claim 2, wherein the inner end inside region of the discharge main channel (2 a) is directly communicated with the chamber of the cylinder (1), and the inner end outside region of the discharge main channel (2 a) is communicated with the chamber of the cylinder (1) through the discharge chamfer channel (1 b).
4. The refrigerant discharge structure of the rotary compressor as claimed in claim 3, wherein the bar-shaped pillar region (2 a 1) is further arc-shaped.
5. The refrigerant discharge structure of the rotary compressor as claimed in claim 4, wherein the center of the arc of the bar-shaped cylindrical region (2 a 1) coincides with the axis of the chamber of the cylinder (1).
6. The refrigerant discharge structure of the rotary compressor as claimed in claim 2, wherein the minimum gap between the side of the semi-cylindrical region (2 a 2) of the discharge main channel (2 a) and the side of the vane (5) is less than 0.2 mm.
7. The refrigerant discharge structure of the rotary compressor according to any one of claims 1 to 6, wherein the discharge chamfer passage (1 b) has the same cross-sectional shape as the discharge main passage (2 a).
8. The refrigerant discharge structure of the rotary compressor as claimed in claim 7, wherein a longitudinal line of the discharge chamfer passage (1 b) is inclined with respect to an axial line of the chamber of the cylinder (1), and an angle α between the longitudinal line of the discharge chamfer passage (1 b) and the axial line of the chamber of the cylinder (1) is 30 ° to 38 °.
9. The refrigerant discharge structure of the rotary compressor as claimed in any one of claims 1 to 6, wherein the radius R1 of the semi-cylindrical region (2 a 2) of the discharge main channel (2 a) is 27% -37% of the arc length L1 of the central arc of the discharge main channel (2 a).
10. The refrigerant discharge structure of the rotary compressor as claimed in claim 9, wherein the arc length L1 of the central arc of the discharge main channel (2 a) is smaller than or equal to the diameter of the cylindrical discharge main channel in the conventional rotary compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122870933.4U CN216077590U (en) | 2021-11-19 | 2021-11-19 | Refrigerant discharge structure of rotary compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122870933.4U CN216077590U (en) | 2021-11-19 | 2021-11-19 | Refrigerant discharge structure of rotary compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216077590U true CN216077590U (en) | 2022-03-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122870933.4U Active CN216077590U (en) | 2021-11-19 | 2021-11-19 | Refrigerant discharge structure of rotary compressor |
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| Country | Link |
|---|---|
| CN (1) | CN216077590U (en) |
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2021
- 2021-11-19 CN CN202122870933.4U patent/CN216077590U/en active Active
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