CN-224214363-U - Enthalpy-increasing structure for scroll compressor and scroll compressor

CN224214363UCN 224214363 UCN224214363 UCN 224214363UCN-224214363-U

Abstract

The utility model relates to the technical field of scroll compressors, in particular to an enthalpy-increasing structure for a scroll compressor and the scroll compressor, wherein the enthalpy-increasing structure for the scroll compressor comprises a fixed disc, an enthalpy-increasing channel is arranged in the fixed disc, and a compression cavity of the scroll compressor is communicated with the surface of the fixed disc through the enthalpy-increasing channel; the seal assembly is arranged between the enthalpy-increasing pipe part and the static disc, the enthalpy-increasing pipe part and the enthalpy-increasing channel are kept sealed through the seal assembly, and when the static disc floats, the seal assembly is kept in contact with the static disc and the enthalpy-increasing pipe part. The enthalpy-increasing structure for the scroll compressor can solve the problem of how to ensure the reliability of sealing between the enthalpy-increasing pipeline and the static disc.

Inventors

Request for anonymity
YANG JIAXIANG
LIU HONGZHI

Assignees

广州博世舒适科技压缩机技术有限公司

Dates

Publication Date: 20260508
Application Date: 20250626

Claims (10)

1. An enthalpy-increasing structure for a scroll compressor, provided in the scroll compressor, characterized in that the enthalpy-increasing structure for the scroll compressor includes: the compression cavity of the vortex compressor is communicated with the surface of the static disc through the enthalpy increasing channel; an enthalpy-increasing pipe part penetrating through the shell of the scroll compressor, and The seal assembly is arranged between the enthalpy-increasing pipe part and the static disc, the enthalpy-increasing pipe part and the enthalpy-increasing channel are kept sealed through the seal assembly, and when the static disc floats, the seal assembly is kept in contact with the static disc and the enthalpy-increasing pipe part.
2. The enthalpy increasing structure for a scroll compressor according to claim 1, wherein the enthalpy increasing passage includes a first passage extending in an axial direction of the stationary plate, a top end of the first passage being communicated with a back surface of the stationary plate, and a bottom end of the first passage being communicated with the compression chamber through the second passage.
3. The enthalpy-increasing structure for a scroll compressor according to claim 2, wherein an enthalpy-increasing mounting hole is provided at a top end of the first passage, the seal assembly is disposed in the enthalpy-increasing mounting hole, the enthalpy-increasing pipe portion includes a first enthalpy-increasing pipe and a second enthalpy-increasing pipe, the first enthalpy-increasing pipe is disposed at an outer side of the housing, the second enthalpy-increasing pipe is disposed at an inner side of the housing, the first enthalpy-increasing pipe and the second enthalpy-increasing pipe are communicated through a through hole in the housing, an end portion of the second enthalpy-increasing pipe is inserted into the enthalpy-increasing mounting hole, and the seal assembly is sleeved on the second enthalpy-increasing pipe.
4. The enthalpy increasing structure for a scroll compressor according to claim 3, wherein the enthalpy increasing mounting hole is formed with a first step, the seal assembly includes: a first annular fastener fixedly mounted to the first step portion, and The first annular sealing piece, the cross section of annular sealing piece forms L shape, the first end level of first annular sealing piece sets up, the first end of first annular sealing piece is pressed from both sides and is established first annular fastener with between the first step, the second end of first annular sealing piece is vertical to be set up, the second end cover of first annular sealing piece is established the periphery of second enthalpy-increasing pipe, first annular sealing piece with form into the enthalpy-increasing chamber between the first passageway, the pressure of enthalpy-increasing chamber is greater than the pressure of scroll compressor's low pressure chamber, first annular sealing piece is by first end to second end to being close to the direction of enthalpy-increasing chamber is crooked.
5. The enthalpy-increasing structure for a scroll compressor according to claim 2, wherein a protruding enthalpy-increasing column is formed on the back surface of the stationary plate, a through hole is formed in the enthalpy-increasing column and is communicated with the first channel, the enthalpy-increasing pipe portion includes a first enthalpy-increasing pipe and a second enthalpy-increasing pipe, the first enthalpy-increasing pipe is disposed on the outer side of the housing, the second enthalpy-increasing pipe is disposed on the inner side of the housing, the first enthalpy-increasing pipe is communicated with the second enthalpy-increasing pipe through the through hole in the housing, an enthalpy-increasing column mounting hole is formed at an end portion of the second enthalpy-increasing pipe, the seal assembly is disposed in the enthalpy-increasing column mounting hole, the top end of the enthalpy-increasing column is inserted into the enthalpy-increasing column mounting hole, and the seal assembly is sleeved on the enthalpy-increasing column.
6. The enthalpy increasing structure for a scroll compressor according to claim 5, wherein the enthalpy increasing column mounting hole is formed with a second step, the seal assembly includes: a second annular fastener fixedly mounted to the second step portion, and The cross section of second annular seal spare, the shape of L is formed to the cross section of second annular seal spare, the first end level setting of second annular seal spare, the first end of second annular seal spare is pressed from both sides and is established between the second annular fastener with the second step, the second end vertical setting of second annular seal spare, the second end cover of second annular seal spare is established the periphery of enthalpy post increases, the second annular seal spare with form the enthalpy chamber that increases between the first passageway, the pressure that increases the enthalpy chamber is greater than the pressure in scroll compressor's low pressure chamber, the second annular seal spare is by first end to second end to being close to the direction that increases the enthalpy chamber is crooked.
7. The enthalpy increasing structure for a scroll compressor according to claim 2, wherein the enthalpy increasing channel further includes a third channel and a fourth channel, the third channel extends along a radial direction of the fixed disc, a first end of the third channel is communicated with a circumferential surface of the fixed disc, a second end of the third channel is communicated with the second channel through the fourth channel, a top end of the first channel is plugged by a plug, the enthalpy increasing pipe portion includes a third enthalpy increasing pipe and a connecting sleeve, the connecting sleeve is sleeved at an end portion of the third enthalpy increasing pipe, the connecting sleeve is penetrated through the housing, an end surface of the connecting sleeve is formed into a vertical surface, and the sealing assembly is sandwiched between the connecting sleeve and the fixed disc.
8. The enthalpy increasing structure for a scroll compressor according to claim 7, wherein an annular flange portion is formed on a circumferential surface of the stationary plate or on an end surface of the connection sleeve, the seal assembly includes a third annular fastener, a third annular seal member, and a fourth annular fastener, the annular flange portion is sleeved on an outer periphery of the third annular fastener, a cross section of the third annular seal member is formed in an L shape, a first end of the third annular seal member is horizontally disposed, a first end of the third annular seal member is sandwiched between the third annular fastener and the fourth annular fastener, a second end of the third annular seal member is vertically disposed, When the annular flange part is formed on the circumferential surface of the static disc, an enthalpy increasing cavity is formed between the third annular sealing element and the third channel, and the second end of the third annular sealing element is abutted with the end surface of the connecting sleeve; When the annular flange part is formed on the end face of the connecting sleeve, an enthalpy increasing cavity is formed between the third annular sealing element and the third enthalpy increasing pipe, a boss part is formed on the circumferential surface of the static disc, the end face of the boss part is a vertical surface, and the second end of the third annular sealing element is in abutting contact with the end face of the boss part; the pressure of the enthalpy increasing cavity is larger than that of the low-pressure cavity of the scroll compressor, and the third annular sealing piece is bent from the first end to the second end to a direction close to the enthalpy increasing cavity.
9. The enthalpy increasing structure for a scroll compressor according to claim 7, wherein a first end of the third passage is provided with a sink portion, a boss portion is formed on a circumferential surface of the stationary plate, an end surface of the boss portion is a vertical surface, at least one of an end surface of the boss portion and an end surface of the connection sleeve is provided with an annular mounting groove, the seal assembly includes a fourth annular seal member disposed in the annular mounting groove.
10. A scroll compressor comprising the enthalpy increasing structure for a scroll compressor according to any one of claims 1 to 9.

Description

Enthalpy-increasing structure for scroll compressor and scroll compressor Technical Field The application relates to the technical field of scroll compressors, in particular to an enthalpy-increasing structure for a scroll compressor and the scroll compressor. Background As scroll compressor displacement increases, scroll compressors have become increasingly widely used. However, under the low-temperature working condition in the northern area, the heating capacity of the air-conditioning heat pump system is seriously attenuated, and an enthalpy-increasing structure is usually added in the scroll compressor for improving the heating capacity, namely refrigerant gas is supplemented into the dynamic and static disc compression middle cavity, so that the heating capacity of the air-conditioning heat pump system is improved. Meanwhile, for a large-displacement scroll compressor, in order to reduce leakage when the dynamic and static discs compress gas, a back pressure cavity is arranged at the back of the static disc, and the pressure of the back pressure cavity enables the static disc to prop against the dynamic disc, so that leakage quantity is reduced. Due to the fluctuation of the gas pressure of the back pressure cavity and the vibration of the compressor during operation, the static disc can float along the guide post during operation. Therefore, for a scroll compressor in which a floating motion is generated in the stationary plate, the connection position between the enthalpy increasing pipe and the stationary plate is poor in sealing performance. At present, the existing sealing mode is generally to arrange a sealing ring in an enthalpy-increasing pipeline, but when relative displacement is generated between the enthalpy-increasing pipeline and a static disc, the sealing reliability is difficult to guarantee only by means of the sealing ring. Disclosure of utility model Accordingly, the present application is directed to an enthalpy-increasing structure for a scroll compressor and a scroll compressor, which are used for solving the problem of how to ensure the reliability of the seal between the enthalpy-increasing pipeline and the stationary plate. According to a first aspect of the utility model, an enthalpy increasing structure for a scroll compressor is provided, wherein the enthalpy increasing structure for the scroll compressor comprises a fixed disc, an enthalpy increasing channel is arranged in the fixed disc, a compression cavity of the scroll compressor is communicated with the surface of the fixed disc through the enthalpy increasing channel, an enthalpy increasing pipe part penetrates through a shell of the scroll compressor, and a sealing assembly is arranged between the enthalpy increasing pipe part and the fixed disc, sealing is kept between the enthalpy increasing pipe part and the enthalpy increasing channel through the sealing assembly, and when the fixed disc floats, the sealing assembly is kept in contact with the fixed disc and the enthalpy increasing pipe part. Preferably, the enthalpy increasing channel comprises a first channel and a second channel, the first channel extends along the axial direction of the static disc, the top end of the first channel is communicated with the back surface of the static disc, and the bottom end of the first channel is communicated with the compression cavity through the second channel. Preferably, the top of first passageway is provided with increases the enthalpy mounting hole, seal assembly sets up in the enthalpy mounting hole, increase enthalpy pipe portion and include first enthalpy pipe and second enthalpy pipe, first enthalpy pipe sets up the outside of casing, the second enthalpy pipe sets up the inboard of casing, first enthalpy pipe with the second enthalpy pipe is linked together through the through-hole on the casing, the tip of second enthalpy pipe inserts in the enthalpy mounting hole, seal assembly cover is located the second enthalpy pipe. The seal assembly comprises a first annular fastener fixedly mounted on the first step portion, and a first annular seal, wherein the cross section of the annular seal is L-shaped, the first end of the first annular seal is horizontally arranged, the first end of the first annular seal is clamped between the first annular fastener and the first step portion, the second end of the first annular seal is vertically arranged, the second end of the first annular seal is sleeved on the periphery of the second enthalpy increasing pipe, an enthalpy increasing cavity is formed between the first annular seal and the first channel, the pressure of the enthalpy increasing cavity is larger than that of a low-pressure cavity of the scroll compressor, and the first annular seal bends from the first end to the second end in a direction approaching to the enthalpy increasing cavity. Preferably, the back of the static disc is provided with a protruding enthalpy-increasing column, a through hole is formed in the