Variable-capacity scroll compressor

Abstract

The utility model discloses a variable-capacity scroll compressor which comprises a shell, a compressor body, a compressor body, a compressor body and a compressor body. The vortex assembly comprises a movable vortex and a static vortex, the movable vortex is connected with the motor, and the static vortex is arranged on the upper side of the movable vortex and matched with the movable vortex to compress gas; and the control piece is fixedly connected with the shell, the control piece is provided with an output end, and the output end is fixedly connected with the static vortex and used for changing the distance between the static vortex and the dynamic vortex. The scroll compressor has the advantages that the distance between the movable scroll and the static scroll is changed, the capacity of the compressor is adjusted, the structure is simple, the cost is low, and the service life is long.

Description

Technical Field

[0001] The utility model relates to the technical field of compressors, in particular to a variable capacity scroll compressor. Background Art

[0002] Due to the change in load, the conventional fixed-frequency system adjusts the load by starting and stopping the compressor during cooling or heating, resulting in large system temperature fluctuations and low overall energy efficiency. With the increasing requirements for temperature control accuracy and energy efficiency, there is an increasing demand for variable load cooling or heating systems. Variable load methods generally include multiple machines in parallel, variable capacity, and variable frequency. The variable capacity system adopts a mechanical variable capacity method. The compressor always maintains a constant speed operation, which will not cause frequent current shocks to the power grid. The compressor will not start and stop frequently, thereby reducing the risk of liquid hammer and oil loss. There is no need to use a frequency converter, and the system is simple and easy to maintain.

[0003] The compressor in the prior art usually adopts a variable volume channel provided on the upper side of the compressor to cooperate with the variable volume piston inside the compressor to achieve compressor capacity adjustment. The structure is complex, and high-precision cooperation is required, resulting in high cost. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a variable capacity scroll compressor, which realizes the change of compressor capacity, has a simple structure, requires high precision, and is suitable for different processing environments.

[0005] Specifically, the utility model discloses a variable capacity scroll compressor, comprising:

[0006] The housing has a motor disposed inside and an air inlet disposed on the side;

[0007] A scroll assembly, comprising a movable scroll and a stationary scroll, wherein the movable scroll is connected to the motor, and the stationary scroll is located on the upper side of the movable scroll and cooperates with the movable scroll to compress gas;

[0008] A control member is fixedly connected to the housing, and the control member is provided with an output end, and the output end is fixedly connected to the static vortex for changing the distance between the static vortex and the movable vortex.

[0009] The benefit of adopting the above technical solution is that the distance between the movable scroll and the stationary scroll can be changed to achieve compressor capacity adjustment, and it has a simple structure, low cost and long service life.

[0010] Furthermore, the control component is a piston cylinder, which includes a cylinder body and a piston. The piston is provided with an adapter, and the adapter is detachably connected to the static scroll.

[0011] The benefit of adopting the above technical solution is that the distance between the static scroll and the movable scroll is controlled by the extension and retraction of the piston, so as to realize the change of the compressor capacity. When the distance between the static scroll and the movable scroll is the smallest, it is the full-load working state. When the distance between the static scroll and the movable scroll becomes larger, a part of the gas is directly discharged without being compressed. By changing the distance, different power working states can be achieved.

[0012] Furthermore, an air outlet is provided in the middle of the static vortex, a through hole is provided inside the adapter, and a plurality of exhaust holes are provided around the through hole.

[0013] The benefit of adopting the above technical solution is that the setting of the adapter facilitates the connection between the piston cylinder and the static vortex, and at the same time the adapter will not cause blockage to the air outlet on the static vortex. The setting of multiple exhaust ports is conducive to the discharge of high-pressure gas.

[0014] Furthermore, the piston is provided with a sealing ring.

[0015] The benefit of adopting the above technical solution is that the provision of the sealing ring ensures the sealing of the piston and prevents leakage of high-pressure gas.

[0016] Furthermore, the piston cylinder is provided with an exhaust port, the exhaust port is connected to the air intake port through a pipeline, and a stop valve is provided on the pipeline.

[0017] The benefit of adopting the above technical solution is that the setting of the stop valve realizes the control of the piston position of the piston cylinder. When the stop valve is opened, the upper part of the piston becomes low pressure, while the lower part of the piston is still in a high pressure state. The piston moves upward, and the distance between the static vortex and the movable vortex increases, thereby changing the working state of the compressor and changing the compressor workload.

[0018] Furthermore, a top cover is provided on the upper side of the shell, a silencer cover is provided inside the shell on the upper side of the static vortex, and the control component is fixedly connected to the silencer cover.

[0019] The benefit of adopting the above technical solution is that the setting of the silent cover realizes the silent function and reduces the noise emitted by the compressor when it is working. The control component is arranged in the silent cover so that its main body is in the high-pressure chamber, and the pressure applied to each part is consistent, which effectively extends the service life of the control component and reduces maintenance and replacement.

[0020] Furthermore, an exhaust pipe is provided on the side of the top cover.

[0021] Furthermore, a connecting hole is provided in the middle of the piston, and the gas compressed by the vortex assembly overflows into the piston cylinder.

[0022] Furthermore, a floating seal assembly is arranged on the upper side of the static scroll, including a floating block and a floating seal ring. An annular groove is arranged on the upper surface of the static scroll, and the floating seal ring is arranged in the annular groove.

[0023] The benefit of adopting the above technical solution is that the setting of the floating seal realizes the sealing between the static vortex and the silencer cover. When the working load of the compressor is adjusted, the distance between the static vortex and the silencer cover will also change. The floating seal ensures the sealing state between the static vortex and the silencer cover to prevent high-pressure gas leakage and affect the compression efficiency of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the drawings required to be used in the embodiments or the description of the prior art will be briefly introduced below.

[0025] Figure 1 This is a cross-sectional view of the overall structure of the variable capacity scroll compressor of the utility model.

[0026] Figure 2 This is an enlarged view of the upper side of the variable capacity scroll compressor of the utility model.

[0027] Figure 3 This is a schematic diagram of the connection of the utility model stop valve

[0028] The reference numerals in the accompanying drawings are as follows:

[0029] Shell 1; motor 11; air inlet 12; top cover 13; silencer cover 14; exhaust pipe 15; movable scroll 2; floating block 3; floating seal ring 31; static scroll 4; air outlet 41; piston cylinder 5; cylinder body 51; piston 52; connecting hole 53; adapter 6; exhaust hole 61; pipeline 7; stop valve 8; bottom cover 9. DETAILED DESCRIPTION

[0030] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0031] like Figure 1-3 As shown, the utility model discloses a variable capacity scroll compressor, comprising:

[0032] The housing 1 has a motor 11 disposed inside. The motor 11 has a rotating main shaft, and the upper end is connected to the scroll assembly to drive the scroll assembly and complete gas compression. The side is provided with an air intake port 12;

[0033] A scroll assembly, comprising a movable scroll 2 and a stationary scroll 4, wherein the movable scroll 2 is connected to the motor 11, and the stationary scroll 4 is located on the upper side of the movable scroll 2 and cooperates with the movable scroll 2 to compress gas;

[0034] A control member is fixedly connected to the housing 1 , and the control member is provided with an output end, and the output end is fixedly connected to the static vortex 4 , and is used for changing the distance between the static vortex 4 and the movable vortex 2 .

[0035] The benefit of adopting the above technical solution is that it can change the distance between the movable scroll 2 and the stationary scroll 4, realize the capacity adjustment of the compressor, and has a simple structure and a long service life.

[0036] In some embodiments, the control component is a piston cylinder 5, which includes a cylinder body 51 and a piston 52. The piston 52 is provided with an adapter 6, which is detachably connected to the static vortex 4. The adapter 6 is connected to the static vortex 4 through a thread to achieve a detachable function. An air outlet 41 is provided in the middle of the static vortex 4, and a through hole is provided inside the adapter 6. After installation, the through hole on the adapter 6 is connected to the air outlet 41 of the static vortex 4, and a plurality of exhaust holes 61 are provided around the through hole. The provision of multiple exhaust ports is conducive to the discharge of high-pressure gas.

[0037] In some embodiments, the piston 52 is provided with a sealing ring, which is arranged around the piston 52 to ensure the sealing between the piston 52 and the piston cylinder 5 to prevent leakage of high-pressure gas.

[0038] In some embodiments, the piston cylinder 5 is provided with an exhaust port, and the exhaust port is connected to the air intake port 12 via a pipeline 7 , and a stop valve 8 is provided on the pipeline 7 .

[0039] When the compressor is 100% working, the stop valve 8 is closed, the piston 52 and the piston cylinder 5 are in the high-pressure chamber as a whole, the static scroll 4 is pressed down by the exhaust pressure and the force of the back pressure chamber and is axially close to the movable scroll 2, achieving 100% load operation; when the compressor is partially loaded (not 100% working), the stop valve 8 is opened, the exhaust passage on the upper part of the piston cylinder 5 is connected to the suction pipe of the compressor, becoming low pressure, while the lower part of the piston 52 is high pressure, the piston 52 is pushed upward under the pressure difference, the static scroll 4 is lifted, and the static scroll 4 and the movable scroll 2 form a certain axial gap for axial unloading, and the compressor is in 0% working state; when the stop valve 8 is closed again, the compressor is in 100% working state again. Controlling the opening and stopping frequency of the stop valve 8 can make the compressor in a partial load working state of 0%-100%.

[0040] In some embodiments, a top cover 13 is provided on the upper side of the shell 1, a silencer cover 14 is provided inside the shell 1 on the upper side of the static vortex 4, the control component is fixedly connected to the silencer cover 14, and a high-pressure chamber is formed between the silencer cover 14 and the top cover 13 through high-pressure gas. A bottom cover 9 is also provided at the bottom of the shell 1, and a low-pressure space is formed between the bottom cover 9 and the shell 1 and the silencer cover 14. The setting of the silencer cover realizes a silence function and reduces the noise emitted when the compressor is working. The control component is arranged in the silencer cover 14, so that its main body is in the high-pressure chamber, and the pressures applied to each part are consistent, thereby effectively extending the service life of the control component and reducing maintenance and replacement.

[0041] Furthermore, an exhaust pipe 15 is provided on the side of the top cover 13 , and the compressed mixed gas and the like are discharged through the exhaust pipe 15 .

[0042] Furthermore, a connecting hole 53 is opened in the middle of the piston 52, and the gas compressed by the vortex assembly overflows into the piston cylinder 5, and the high-pressure gas enters the piston 52. The pressure at the upper and lower parts of the piston is balanced, and the static vortex 4 is tightly attached to the movable vortex 2 under the action of the back pressure chamber pressure and the exhaust pressure to achieve full load operation.

[0043] In some embodiments, a floating seal assembly is disposed on the upper side of the static vortex 4, including a floating block 3 and a floating seal ring 31. An annular groove is disposed on the upper surface of the static vortex 4, and the floating seal ring 31 is disposed in the annular groove.

[0044] The setting of the floating seal realizes the sealing between the static scroll 4 and the silencer cover 14. When the working load of the compressor is adjusted, the distance between the static scroll 4 and the silencer cover 14 will also change. The floating seal ensures the sealing state between the static scroll 4 and the silencer cover 14 to prevent high-pressure gas leakage and affect the compression efficiency of the compressor.

[0045] For ordinary technicians in this field, several modifications and improvements can be made without departing from the creative concept of the utility model, which all fall within the protection scope of the utility model.

Claims

1. A variable capacity scroll compressor, characterized in that: include: A housing (1) is provided with a motor (11) inside and an air inlet (12) on the side; A scroll assembly, comprising a movable scroll (2) and a stationary scroll (4), wherein the movable scroll (2) is connected to the motor (11), and the stationary scroll (4) is located on the upper side of the movable scroll (2) and cooperates with the movable scroll (2) to compress gas; A control member is fixedly connected to the housing (1), and the control member is provided with an output end, and the output end is fixedly connected to the static vortex (4) and is used to change the distance between the static vortex (4) and the movable vortex (2).

2. The variable capacity scroll compressor according to claim 1, characterized in that: The control component is a piston cylinder (5), and the piston cylinder (5) comprises a cylinder body (51) and a piston (52). The piston (52) is provided with an adapter (6), and the adapter (6) is detachably connected to the static scroll (4).

3. The variable capacity scroll compressor according to claim 2, characterized in that: An air outlet (41) is provided in the middle of the static vortex (4), a through hole is provided inside the adapter (6), and a plurality of exhaust holes (61) are provided around the through hole.

4. The variable capacity scroll compressor according to claim 2, characterized in that: The piston (52) is provided with a sealing ring.

5. The variable capacity scroll compressor according to claim 2, characterized in that: The piston cylinder (5) is provided with an exhaust port, and the exhaust port is connected to the air intake port (12) via a pipeline (7), and a stop valve (8) is provided on the pipeline (7).

6. The variable capacity scroll compressor according to claim 1, characterized in that: A top cover (13) is provided on the upper side of the shell (1), a silencer cover (14) is provided inside the shell (1) on the upper side of the static vortex (4), and the control component is fixedly connected to the silencer cover (14).

7. The variable capacity scroll compressor according to claim 6, characterized in that: An exhaust pipe (15) is arranged on the side of the top cover (13).

8. The variable capacity scroll compressor according to claim 2, characterized in that: A connecting hole (53) is provided in the middle of the piston (52), and the gas compressed by the scroll assembly overflows into the piston cylinder (5).

9. The variable capacity scroll compressor according to claim 1, characterized in that: A floating seal assembly is arranged on the upper side of the static scroll (4), comprising a floating block (3) and a floating seal ring (31); an annular groove is arranged on the upper surface of the static scroll (4), and the floating seal ring (31) is arranged in the annular groove.

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