CN-122014615-A - Variable-capacity compressor and air conditioner

CN122014615ACN 122014615 ACN122014615 ACN 122014615ACN-122014615-A

Abstract

The invention provides a variable-volume compressor and an air conditioner, wherein the variable-volume compressor comprises a second cylinder and a second flange, a pin hole is formed in the second flange, a pin valve is arranged in the pin hole, one end of the pin hole is connected with a variable-volume cavity, one end of the pin valve can bear the pressure in the variable-volume cavity, the other end of the pin valve can be introduced into a shell cavity of the compressor to serve as back pressure, a first pressure relief channel is formed in the pin valve, a second pressure relief channel is formed in the second flange, when the pressure in the variable-volume cavity is larger than the preset pressure, the variable-volume cavity can be communicated with the first pressure relief channel and the second pressure relief channel in sequence, so that fluid in the variable-volume cavity is relieved into the shell cavity, and when the pressure in the variable-volume cavity is smaller than the preset pressure, the variable-volume cavity is disconnected from the first pressure relief channel and the second pressure relief channel. According to the invention, the problems of noise, vibration and the like generated when the variable-capacity compressor is started after standing for a long time at a low temperature can be solved.

Inventors

HU YANJUN
QUE PEIZHEN
CAI QINGBO

Assignees

珠海凌达压缩机有限公司
珠海格力电器股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260225

Claims (10)

1. A variable capacity compressor is characterized by comprising: A second air cylinder (2) and a second flange (29), wherein a second sliding sheet (4) and a variable-volume cavity (5) are arranged on the second air cylinder (2), the tail part of the second sliding sheet (4) is communicated with the variable-volume cavity (5), The second flange (29) with the axial one end of second cylinder (2) is connected, be provided with pinhole (7) on second flange (29), be provided with in pinhole (7) round pin valve (10), the one end of pinhole (7) with varactor (5) meet, make the one end of round pin valve (10) can bear the pressure in varactor (5), the pressure in shell cavity (9) of compressor can be introduced to the other end of round pin valve (10) is regarded as back pressure, the inside of round pin valve (10) is provided with first pressure release passageway (6), be provided with second pressure release passageway (8) on second flange (29), when the pressure in varactor (5) is greater than preset pressure, varactor (5) with first pressure release passageway (6) with second pressure release passageway (8) can communicate in proper order, with fluid in varactor (5) is to in shell cavity (9), when preset pressure in varactor (5) is less than preset pressure release passageway (6).
2. The variable capacity compressor as claimed in claim 1, wherein: the first pressure relief channel (6) extends from one end of the pin valve (10) towards the interior of the pin valve (10), and the second pressure relief channel (8) extends from the outer peripheral wall of the second flange (29) towards the interior of the second flange (29) to communicate with the pin bore (7).
3. The variable capacity compressor as claimed in claim 1, wherein: The pin valve (10) comprises a first end (11) and a second end (12) which are opposite to each other, wherein the first end (11) is opposite to the variable volume cavity (5) so as to bear the pressure of the variable volume cavity (5), and the second end (12) is opposite to the back pressure channel (13) so as to bear the pressure of the shell cavity (9); One end of the back pressure channel (13) is communicated with the pin hole (7), and the other end of the back pressure channel (13) is communicated with the shell cavity (9) so that the pressure introduced into the shell cavity (9) can enter the pin hole (7) and act on the second end (12) of the pin valve (10).
4. A variable capacity compressor as claimed in claim 3, wherein: A third pressure relief channel (14) is further formed in the pin valve (10), and the third pressure relief channel (14) extends from the outer peripheral wall of the pin valve (10) to the inside of the pin valve (10) and is communicated with the first pressure relief channel (6); When the pin valve (10) moves to the point that the third pressure relief channel (14) is not opposite to the second pressure relief channel (8), the variable volume cavity (5) is disconnected from the first pressure relief channel (6) and the second pressure relief channel (8); When the pin valve (10) moves to the state that the third pressure relief channel (14) is opposite to and communicated with the second pressure relief channel (8), the first end (11) of the pin valve (10) is not connected with the second sliding sheet (4), and the variable volume cavity (5) can be communicated with the first pressure relief channel (6), the third pressure relief channel (14) and the second pressure relief channel (8) in sequence.
5. The variable capacity compressor as claimed in claim 4, wherein: the pin valve (10) is of a columnar structure, the first pressure relief channel (6) extends along the axial direction of the pin valve (10), the third pressure relief channels (14) extend along the radial direction of the pin valve (10), the plurality of third pressure relief channels (14) are arranged at intervals along the circumferential direction of the pin valve (10); The outer peripheral wall of the pin valve (10) is also provided with an annular groove (24), and the annular groove (24) is connected and communicated with the radial outer ends of the third pressure relief channels (14).
6. A variable capacity compressor as claimed in claim 3, wherein: The pin valve (10) comprises a first shaft section and a second shaft section, the outer diameter of the first shaft section is smaller than that of the second shaft section, a first step surface (31) is formed at the joint position of the outer periphery of the first shaft section and the outer periphery of the second shaft section, an elastic element (25) is sleeved on the outer periphery of the first shaft section, one end of the elastic element (25) is connected with the first step surface (31), the pin hole (7) comprises a first section hole and a second section hole which are connected along the axial direction of the pin hole, the first section hole is close to the second cylinder (2) relative to the second section hole, the inner diameter of the first section hole is smaller than that of the second section hole, so that a second step surface (32) is formed at the joint position of the first section hole and the second section hole, and the other end of the elastic element (25) is connected with the second step surface (32), so that the elastic element (25) can apply elastic force towards the cover plate (26) to the pin valve (10).
7. The variable capacity compressor as claimed in claim 4, wherein: The second cylinder (2) is further provided with a variable volume port (16) and a communication channel (17), the variable volume port (16) is formed in the direction from the radial outer end of the second cylinder (2) to the inside, the variable volume port (16) and the variable volume cavity (5) are located at different circumferential positions on the second cylinder (2), the variable volume port (16) and the variable volume cavity (5) are communicated through the communication channel (17), the variable volume port (16) can be connected with different pressures outside the variable volume compressor, so that the pin valve (10) is connected with the second sliding vane (4), at the moment, the second sliding vane (4) is not connected with the second roller (18), or the pin valve (10) is not connected with the second sliding vane (4) to release pressure of the variable volume cavity (5), at the moment, and the second sliding vane (4) is connected with the second roller (18).
8. The variable capacity compressor as claimed in claim 7, wherein: When the pin valve (10) is connected with the second sliding sheet (4), the pin valve (10) closes the communication between the first pressure relief channel (6) and the second pressure relief channel (8), and when the pin valve (10) is not connected with the second sliding sheet (4) and moves to the state that the second pressure relief channel (8) is relatively communicated with the third pressure relief channel (14), the pin valve (10) opens the communication between the first pressure relief channel (6) and the second pressure relief channel (8), so that the variable volume cavity (5) relieves fluid into a shell cavity (9) of the compressor through the first pressure relief channel (6), the third pressure relief channel (14) and the second pressure relief channel (8).
9. The variable capacity compressor as claimed in claim 8, wherein: The second cylinder (2) is located at the upper end of the second flange (29), the upper end of the pin valve (10), namely the first end (11), is capable of bearing downward pressure F1 in the variable volume chamber (5), the lower end of the pin valve (10), namely the second end (12), is capable of bearing upward pressure F2 in the back pressure channel (13), the pressure in the back pressure channel (13) is equal to the pressure in the shell chamber (9), and when the elastic element (25) is also included, the pin valve (10) is also capable of bearing downward elastic force G exerted on the elastic element (25); When the pin valve (10) receives a force of F1+G < F2, the pin valve (10) can move upwards to be connected with the second sliding sheet (4), the second sliding sheet (4) is locked, the communication between the variable volume cavity (5) and the shell cavity (9) is closed through the pin valve (10), when the pin valve (10) receives a force of F1+G > F2, the pin valve (10) can move downwards to be relatively communicated with the second pressure relief channel (8) and the third pressure relief channel (14), and the communication between the variable volume cavity (5) and the shell cavity (9) is opened through the pin valve (10), so that the variable volume cavity (5) can relieve air flow into the shell cavity (9) through the first pressure relief channel (6), the third pressure relief channel (14) and the second pressure relief channel (8).
10. An air conditioner comprising the variable capacity compressor as claimed in any one of claims 1 to 9.

Description

Variable-capacity compressor and air conditioner Technical Field The invention belongs to the technical field of compressors, and particularly relates to a variable-capacity compressor and an air conditioner. Background The rolling rotor type compressor has the outstanding advantages of small volume, simple structure and the like, and is widely applied to the fields of household air conditioners, household multi-split air conditioners and the like. Under the application scene of the household multi-split air conditioner, 1 external machine is simultaneously connected with a plurality of internal machines. When the internal machines are all started, the external machines are required to run at full load, and when the internal machines are all started, the internal machines are required to run at low load. Based on the characteristics that the load change is large when the domestic multi-split air conditioner operates, the frequency conversion technology can meet the use requirement to a certain extent, but when the internal air conditioner is smaller, the problem that the cooling capacity supply is larger than the cooling capacity supply required still occurs when the compressor operates to the lower frequency limit, and the compressor is frequently started and stopped at the moment, so that the indoor environment temperature fluctuation is large, and the power consumption of a unit is increased. On the basis of using a variable frequency technology in a rolling rotor type compressor, a selectively working variable-volume cylinder is arranged on a pump body, when the small load operation is required, the variable-volume cylinder does not work, when the large load operation is required, the variable-volume cylinder works, the minimum load of a unit is greatly reduced, and the problem of frequent start-up and shutdown of the unit under the operation condition of small load such as single-start 1 internal unit is solved. Pressure pulsation in the variable volume cavity has no influence on operation stability under most operation conditions of the household multi-split air conditioner. However, when the outdoor unit is placed at a low temperature for a long time, the refrigerant in the unit is changed from a gaseous state to a liquid state. After the unit is started, a large amount of liquid refrigerant is sucked into the compressor and is guided to the variable-volume cavity through the variable-volume opening, and as the liquid refrigerant has incompressible characteristics, the pressure in the variable-volume cavity changes rapidly along with the reciprocating motion of the second sliding vane, so that the compressor shakes severely and noise is generated, and the operation safety of the unit and the use comfort of the unit are seriously affected. Because the variable-capacity compressor in the prior art has the technical problems of easy noise, shake and the like when being started after standing for a long time at low temperature, the invention designs the variable-capacity compressor and the air conditioner. Disclosure of Invention Therefore, the invention provides a variable-capacity compressor and an air conditioner, which can solve the technical problems that the variable-capacity compressor in the prior art is easy to generate noise and shake when being started after standing for a long time at low temperature. In order to solve the above problems, the present invention provides a variable capacity compressor comprising: The second cylinder and the second flange are provided with a second sliding vane and a variable-volume cavity, the tail part of the second sliding vane is communicated with the variable-volume cavity, The second flange is connected with one axial end of the second cylinder, a pin hole is formed in the second flange, a pin valve is arranged in the pin hole, one end of the pin hole is connected with the variable volume cavity, so that one end of the pin valve can bear the pressure in the variable volume cavity, the other end of the pin valve can introduce the pressure in a shell cavity of the compressor to serve as back pressure, a first pressure relief channel is formed in the pin valve, a second pressure relief channel is formed in the second flange, when the pressure in the variable volume cavity is larger than preset pressure, the variable volume cavity, the first pressure relief channel and the second pressure relief channel can be sequentially communicated, fluid in the variable volume cavity is relieved to the shell cavity, and when the pressure in the variable volume cavity is smaller than preset pressure, the variable volume cavity, the first pressure relief channel and the second pressure relief channel are disconnected. In some embodiments of the present invention, in some embodiments, The first pressure relief passage extends from one end of the pin valve toward the interior of the pin valve, and the second pressure relief passage extends from the outer peripheral wall of th