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CN-224214362-U - Pressure ratio adjusting structure for scroll compressor and scroll compressor

CN224214362UCN 224214362 UCN224214362 UCN 224214362UCN-224214362-U

Abstract

The utility model relates to the technical field of scroll compressors, in particular to a pressure ratio adjusting structure for a scroll compressor and the scroll compressor, wherein the pressure ratio adjusting structure for the scroll compressor comprises a fixed disk part, one side of the fixed disk part is provided with an exhaust chamber, and the other side of the fixed disk part is provided with a fixed scroll blade; the movable disk part is provided with movable vortex blades, the movable vortex blades are meshed with the fixed vortex blades, the fixed vortex blades and the movable vortex blades enclose a medium-pressure chamber and a high-pressure chamber, a plurality of communication holes are formed in the fixed disk part, the communication holes are formed with a strip-shaped middle part and an arc-shaped end part, the communication holes can be communicated with an exhaust chamber and the medium-pressure chamber or the high-pressure chamber, and the communication holes can be kept open or kept closed through the movable vortex blades. The pressure ratio adjusting structure for the scroll compressor and the scroll compressor can solve the problem that fluid cannot be discharged timely and effectively in the advanced exhaust stage of the conventional scroll compressor.

Inventors

  • Tang Didong
  • LIU HONGZHI
  • LI FENG

Assignees

  • 广州博世舒适科技压缩机技术有限公司

Dates

Publication Date
20260508
Application Date
20250625

Claims (10)

  1. 1. A pressure ratio adjustment structure for a scroll compressor, characterized by comprising: the fixed disk component is provided with an exhaust chamber at one side, and a fixed vortex blade is arranged at the other side; The movable disk part is provided with movable vortex blades which are meshed with the fixed vortex blades, and the fixed vortex blades and the movable vortex blades enclose a medium-pressure chamber and a high-pressure chamber, and A plurality of communication holes provided in the fixed disk member, the communication holes being formed with a strip-shaped middle portion and an arc-shaped end portion, the communication holes being capable of communicating the exhaust chamber with the medium pressure chamber or the high pressure chamber; During the movement of the movable disk member, a plurality of the communication holes can be simultaneously kept open or kept closed by the movable scroll blade.
  2. 2. The pressure ratio adjusting structure for a scroll compressor according to claim 1, wherein the communication hole includes a first communication hole, a middle portion of the first communication hole is formed in a straight bar shape, an end portion of the first communication hole is formed in a circular arc shape, and a curved surface of the end portion of the first communication hole is tangent to a straight surface of the middle portion of the first communication hole.
  3. 3. The pressure ratio adjusting structure for a scroll compressor according to claim 1 or 2, wherein the communication hole includes a second communication hole, a middle portion of which is formed in a circular arc shape having a radius R1, an end portion of which is formed in a circular arc shape having a radius R2, and R1> R2, a curved surface of the end portion of which is tangent to a curved surface of the middle portion of the second communication hole.
  4. 4. The pressure ratio adjusting structure for a scroll compressor according to claim 1, wherein the number of the communication holes is 2 to 6.
  5. 5. The pressure ratio adjusting structure for a scroll compressor according to claim 4, wherein a plurality of said communication holes are arranged in an extending direction of said fixed scroll blade.
  6. 6. The pressure ratio adjusting structure for a scroll compressor according to claim 5, wherein a part of the communication holes are provided along an inner side of the fixed scroll blade, and another part of the communication holes are provided along an outer side of the fixed scroll blade.
  7. 7. The pressure ratio adjusting structure for a scroll compressor according to claim 5, wherein a distance between the communication hole and the fixed scroll blade is not less than 0.05mm.
  8. 8. The pressure ratio adjusting structure for a scroll compressor according to claim 1, wherein a linear distance between adjacent communication holes is equal to or more than 0.5mm.
  9. 9. The pressure ratio adjusting structure for a scroll compressor according to claim 1, wherein the fixed disk member includes a fixed disk plate portion on which the fixed scroll blades are provided, and the communication hole penetrates the fixed disk plate portion in a vertical direction.
  10. 10. A scroll compressor, characterized in that it includes the pressure ratio adjusting structure for a scroll compressor according to any one of claims 1 to 9.

Description

Pressure ratio adjusting structure for scroll compressor and scroll compressor Technical Field The application relates to the technical field of scroll compressors, in particular to a pressure ratio adjusting structure for a scroll compressor and the scroll compressor. Background The scroll compressor is a positive displacement compressor, its compression mechanism is made up of fixed disk part and movable disk part, through the blade of movable disk part and blade of fixed disk part intermesh form the closed cavity, the movable disk part reduces the volume of the cavity through the gyration motion, and then reaches the effect of compressed fluid. During actual operation of the scroll compressor, the discharge pressure is typically higher than the application pressure. In this case, the portion exceeding the applied pressure generates additional energy consumption, that is, an overcompression phenomenon. The phenomenon greatly reduces the energy consumption efficiency of the closed vortex compressor, so that a circular straight hole is usually formed in the fixed disc part to be matched with a corresponding valve assembly to adjust the pressure ratio, and the purposes of exhausting in advance and reducing the over-compression power consumption are achieved. However, under space-constrained conditions, there are significant limitations to the circular straight holes, which can be opened with significant limitations in both the size of the aperture and the number of holes. This structural limitation results in a small flow area for the fluid such that the fluid is not effectively expelled in a timely manner during the early exhaust phase. Disclosure of utility model In view of the above, an object of the present application is to provide a pressure ratio adjusting structure for a scroll compressor and a scroll compressor, which solve the problem that a fluid cannot be discharged timely and effectively in an early discharge stage of a conventional scroll compressor. According to a first aspect of the present utility model, there is provided a pressure ratio adjusting structure for a scroll compressor, wherein a fixed disc member is provided with a discharge chamber on one side thereof and a fixed scroll blade on the other side thereof, a movable disc member is provided with a movable scroll blade which is engaged with the fixed scroll blade, the fixed scroll blade and the movable scroll blade define a medium pressure chamber and a high pressure chamber, and a plurality of communication holes are provided in the fixed disc member, the communication holes are formed with a strip-shaped middle portion and an arc-shaped end portion, the communication holes are capable of communicating the discharge chamber with the medium pressure chamber or the high pressure chamber, and a plurality of communication holes are capable of being simultaneously kept open or kept closed by the movable scroll blade during movement of the movable disc member. Preferably, the communication hole includes a first communication hole whose middle portion is formed in a straight bar shape, whose end portion is formed in a circular arc shape, and whose curved surface is tangent to a straight surface of the middle portion. Preferably, the communication hole includes a second communication hole, a middle portion of which is formed in a circular arc shape having a radius R1, an end portion of which is formed in a circular arc shape having a radius R2, and R1> R2, and a curved surface of the end portion of which is tangent to a curved surface of the middle portion of the second communication hole. Preferably, the number of the communication holes is 2 to 6. Preferably, a plurality of the communication holes are arranged along an extending direction of the fixed scroll blade. Preferably, a part of the communication holes are provided along an inner side of the fixed scroll blade, and another part of the communication holes are provided along an outer side of the fixed scroll blade. Preferably, the distance between the communication hole and the fixed vortex blade is more than or equal to 0.05mm. Preferably, the linear distance between adjacent communication holes is equal to or more than 0.5mm. Preferably, the fixed disk member includes a fixed disk plate portion on which the fixed scroll blade is provided, and the communication hole penetrates the fixed disk plate portion in a vertical direction. According to a second aspect of the present utility model there is provided a scroll compressor comprising a pressure ratio adjustment arrangement for a scroll compressor as described above. According to the pressure ratio adjusting structure for the scroll compressor and the scroll compressor, one side of the fixed disk part is provided with the exhaust chamber, and the other side of the fixed disk part is provided with the fixed scroll blade. The movable disc component is provided with movable vortex blades, and the movable vortex blades are meshed with