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Compression Mechanism and Low Back Pressure Rotary Compressor

A compression mechanism and compression chamber technology, applied in the direction of rotary piston machinery, rotary piston pump, rotary piston type/swing piston type pump components, etc., can solve the problem of affecting cooling capacity, increasing friction loss, increasing input force, etc. problems, achieve the effect of reducing wear, reducing friction noise and prolonging service life

Active Publication Date: 2018-03-16
GUANGDONG MEIZHI COMPRESSOR +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the performance of the current all-low-pressure compressor is lower than that of the high-back-pressure compressor. The reason that affects the performance of the low-back-pressure compressor is the leakage of the piston end face, which affects the cooling capacity; the viscosity of the shaft running oil is higher than that of the high-back-pressure compressor, and the friction loss Increase leads to increased input force
Based on the above two factors affecting performance, it is difficult to effectively improve low back pressure performance

Method used

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  • Compression Mechanism and Low Back Pressure Rotary Compressor
  • Compression Mechanism and Low Back Pressure Rotary Compressor
  • Compression Mechanism and Low Back Pressure Rotary Compressor

Examples

Experimental program
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Effect test

Embodiment 1

[0071] Such as Figure 1-Figure 5 As shown, in this embodiment, the low back pressure rotary compressor 100 includes a housing 150, a motor assembly 160 and a compression mechanism.

[0072] Specifically, an oil pool 151 is provided at the bottom of the housing 150 , the compression mechanism and the motor assembly 160 are both disposed in the housing 150 , and the motor assembly 160 is located above the housing 150 assembly.

[0073] The compression mechanism includes: a bearing assembly, a cylinder 120 , a crankshaft 130 , a sliding plate 124 and a piston 140 . Wherein, the bearing assembly includes an upper bearing 115 and a lower bearing 116 . The air cylinder 120 has a compression chamber 121 and a slide slot 122 communicating with the compression chamber 121 . The cylinder 120 is sandwiched between the upper bearing 115 and the lower bearing 116 , that is, the lower end surface of the upper bearing 115 is against the upper end surface of the cylinder 120 , and the upper ...

Embodiment 2

[0086] Such as Figure 6-Figure 8 As shown, the difference from Embodiment 1 is that in this embodiment, an annular groove 114 is provided at the lower end of the central hole 111 of the upper bearing 115, and the depth of the annular groove 114 in the radial direction of the central hole 111 is d' , the annular groove 114 communicates with the groove 112, and the Lmin1, the Lmin2, the Lmin3, and the Lmin4 satisfy the following relationship: 2mm≤Lmin1≤(D-d-d'-e)mm; 3mm≤Lmin2≤(D-d -d'-e)mm; 4mm≤Lmin3≤(D-d-d'-e)mm; 5mm≤Lmin4≤(D-d-d'-e)mm. Thus, the contact area between the upper bearing 115 and the cylinder 120 can be effectively reduced, thereby reducing the friction loss of the compression mechanism.

Embodiment 3

[0088] Such as Figure 9 As shown, the difference from Embodiment 1 is that in this embodiment, two ribs 113 are arranged in the groove 112, and a part of one rib 113 is located in the first quadrant I, and the other part is located in the second quadrant II. inside; a part of another rib 113 is located in the second quadrant II, and another part is located in the third quadrant III. Therefore, not only the oil storage capacity of the compression mechanism can be improved, but also the structural strength of the bearing assembly can be enhanced.

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Abstract

The invention discloses a compressing mechanism and a low-backpressure rotary compressor. The compressing mechanism comprises a bearing assembly, an air cylinder, a bent axle and a piston; the bearing assembly is provided with a center hole; the air cylinder is arranged on the bearing assembly and is provided with a compressing cavity and a sliding sheet groove communicating with the compressing cavity, and a groove is formed in the end face, opposite to the air cylinder, of the bearing assembly and communicates with the center hole; the bent axle penetrates through the center hole and the air cylinder and is provided with an eccentric part, and the eccentric part is located in the compressing cavity; the piston is arranged on the eccentric part in a sleeving mode and can roll along the inner wall of the compressing cavity. According to the compressing mechanism, the groove is formed in the end face, opposite to the air cylinder, of the bearing assembly and can store lubricating oil, the lubricating oil in the groove can flow into the part between the eccentric part and the bearing assembly when the compressing mechanism works, and therefore abrasion between the eccentric part and the bearing assembly can be effectively lowered, the friction noise can be lowered, and the service life of the compressing mechanism can be prolonged.

Description

technical field [0001] The invention relates to the technical field of refrigeration equipment, in particular to a compression mechanism and a low back pressure rotary compressor. Background technique [0002] As an alternative refrigerant for HCFC (hydrochlorofluorocarbons), such as R22, and HFC (hydrofluorocarbons), such as R410A or R407C, hydrocarbon refrigerants have attracted the most attention in the industry. However, when hydrocarbon refrigerants are used in air-conditioning systems, there is a very important issue, that is, they are highly flammable, and the amount of refrigerant packaged in hydrocarbon air-conditioning systems must be limited. [0003] Compared with the rotary compressor with high back pressure structure, there is a rotary compressor with low back pressure structure in which the pressure inside the casing is low, that is, the inside of the casing communicates with the suction pressure. The content of the refrigerant in the low back pressure compre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04C18/356F04C29/02
CPCF04C18/356F04C29/02
Inventor 郭小龙高斌黎法运
Owner GUANGDONG MEIZHI COMPRESSOR
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