阅读说明：本技术 一种设有防泄漏密封条的涡旋压缩机、车载空调 (Scroll compressor and vehicle-mounted air conditioner with anti-leakage sealing strips ) 是由 罗岳华 梁振铎 于 2019-12-19 设计创作，主要内容包括：本发明提供一种设有防泄漏密封条的涡旋压缩机、车载空调；涡旋压缩机包括控制器、涡盘、支架、驱动系统、机壳、前盖、后盖；涡盘包括可以相互啮合的定盘和动盘,驱动系统包括电机、转子、驱动轴；在定盘齿顶设有密封槽,密封槽中设置有密封条；密封条上端面平齐,下端面随着温度不同,呈阶梯状增加；密封条在密封槽中是可以上下浮动的。由于涡旋压缩机特点,中心压缩腔到第二压缩腔在到吸气腔,其压力和温度是不断上升的。因此涡旋齿壁的温度也随着型线从内到外,呈现不断下降趋势。因此密封槽底部高度也从中心向外呈现由高到低的趋势。本发明设计防泄漏密封条结构,避免因涡旋齿中心和外侧温度的不同,导致膨胀量的差异,发生气体泄漏的情况。(The invention provides a scroll compressor and a vehicle-mounted air conditioner with a leakage-proof sealing strip; the scroll compressor comprises a controller, a scroll, a bracket, a driving system, a shell, a front cover and a rear cover; the scroll comprises a fixed disc and a movable disc which can be meshed with each other, and the driving system comprises a motor, a rotor and a driving shaft; a sealing groove is arranged at the tooth top of the fixed disc, and a sealing strip is arranged in the sealing groove; the upper end surface of the sealing strip is level, and the lower end surface of the sealing strip is increased in a step shape along with different temperatures; the sealing strip can float up and down in the sealing groove. Due to the scroll compressor characteristics, the pressure and temperature rise from the central compression chamber to the second compression chamber to the suction chamber. The temperature of the scroll tooth wall therefore also shows a decreasing trend as the profile moves from inside to outside. The height of the bottom of the seal groove also tends to be high to low from the center outwards. The invention designs the anti-leakage sealing strip structure, and avoids the condition that gas leakage occurs due to the difference of expansion amount caused by the difference of the temperatures of the center and the outer side of the vortex tooth.)

1. A scroll compressor provided with a leakage-proof sealing strip comprises a scroll disk, and is characterized in that the scroll disk comprises a fixed disk and a movable disk which can be meshed with each other; the tooth top of the fixed disc is provided with a sealing groove, and a sealing strip is arranged in the sealing groove; the upper end surfaces of the sealing strips are parallel and level, and the thickness and the height of the lower end surface are gradually increased from the center to the outer side of the fixed disc; the sealing strip floats up and down in the sealing groove along with pressure change.

2. A scroll compressor provided with a leak-proof seal strip according to claim 1, wherein the seal strip is varied in height in a stepwise manner.

3. A scroll compressor provided with a leakage preventing seal according to claim 2, wherein the seal has a step height matching the step height of the movable platen, the movable platen is rotated by 90 degrees in steps, and each step height is 0.01 mm.

4. A scroll compressor provided with a leakage preventing seal strip according to claim 1, wherein the seal strip is made of a modified plastic.

5. The scroll compressor provided with the leakage-preventing sealing strip according to claim 1, further provided with a bracket divided into a main bracket and an auxiliary bracket; the periphery of the main bracket is connected with the inner wall of the casing.

6. An on-vehicle air conditioner characterized in that the scroll compressor of any one of claims 1 to 5 is used.

Technical Field

The present invention relates to a compressor, and more particularly, to a scroll compressor, a vehicle air conditioner provided with a leakage-preventing seal strip.

Background

The scroll compressor mainly comprises a control part, a driving part, a compression part and an exhaust device, wherein the compression part is provided with a pair of scroll disks, a fixed disk and a movable disk, and the fixed disk is meshed with the movable disk. The main compression process of the scroll compressor is realized by the pair of scrolls. Air is compressed into high-temperature high-pressure gas through a scroll, the high-temperature high-pressure gas is discharged from an exhaust hole in the center of the fixed disc, and the high-temperature high-pressure gas is discharged from an exhaust pipe after circulating to the inner space of the compressor. There are two types of scroll compressors on the market today. The first is a high-temperature high-pressure chamber compressor: that is, the motor and the scroll are mostly positioned in the high-temperature high-pressure cavity at the exhaust end. The second is a low-temperature low-pressure cavity compressor: the motor and the scroll are mostly positioned in a low-temperature low-pressure cavity at the suction end.

The two kinds of compressors are used for realizing the compression process by a vortex disk, but in the process of compressing gas, because the temperature of the center of the vortex tooth is different from that of the outer side of the vortex tooth, the tooth top and the tooth wall expand under the condition of heat syndrome and cold contraction, the sealing strip in the sealing strip groove in the fixed disk floats in the sealing groove, and the lower part of the low-pressure side of the floating sealing strip has a large leakage gap, so that the gas is leaked, the effect of the compressed gas is poor, and the working efficiency of the compressor can not be ensured.

Disclosure of Invention

The invention provides a scroll compressor with a leakage-proof sealing strip, aiming at the problems that in the working process of the compressor, the lower part of a low-pressure side has a larger leakage gap due to the floating of the sealing strip, so that gas is leaked and the compression effect is poor.

In order to achieve the purpose, the invention adopts the following technical scheme:

a scroll compressor and vehicle air conditioner with leak-proof sealing strips comprises a scroll disk, wherein the scroll disk comprises a fixed disk and a movable disk which can be meshed with each other; the tooth top of the fixed disc is provided with a sealing groove, and a sealing strip is arranged in the sealing groove; the upper end surfaces of the sealing strips are flush, and the thickness of the lower end surface is gradually increased from the center to the outer side of the fixed disc; the sealing strip floats up and down in the sealing groove along with pressure change.

Furthermore, the thick bottom of the sealing strip is changed in a step shape.

Further, the sealing strip ladder height is rotated with the driving disk and is matchd, and 90 degrees are a ladder for the driving disk rotation, and each ladder difference in height is 0.01 mm.

Furthermore, the material of the sealing strip is modified plastic.

Further, the scroll compressor is also provided with a support which is divided into a main support and an auxiliary support; the periphery of the main bracket is connected with the inner wall of the casing.

Further, the vehicle-mounted air conditioner adopts the scroll compressor in any one of the steps.

The invention has the beneficial effects that: under the action of the invention, the problem that the lower part of the low-pressure side of the floating sealing strip has a larger leakage gap due to the difference of the temperatures of the center and the outer side of the vortex wrap, which causes the difference of the expansion amount, is solved. The gas leakage condition in the compression process of the compressor is effectively reduced, and the working efficiency of the compressor is increased.

Drawings

FIG. 1 is an overall view of a sealing tape;

FIG. 2 is an expanded view of the sealing strip;

Detailed Description

The present invention will be further described with reference to the following embodiments.

A scroll compressor and vehicle air conditioner with leak-proof sealing strips comprises a scroll disk, wherein the scroll disk comprises a fixed disk and a movable disk which can be meshed with each other; the tooth top of the fixed disc is provided with a sealing groove, and a sealing strip is arranged in the sealing groove; the upper end surfaces of the sealing strips are flush, and the thickness of the lower end surface is gradually increased from the center to the outer side of the fixed disc; the sealing strip floats up and down in the sealing groove along with pressure change.

The thick bottom of the sealing strip is changed in a step shape; the step heights of the sealing strips are matched with the rotation of the movable disc, the movable disc rotates by 90 degrees to form a step, and the height difference of each step is 0.01 mm; the sealing strip is made of modified plastics; the scroll compressor is also provided with a support which is divided into a main support and an auxiliary support; the periphery of the main bracket is connected with the inner wall of the shell; the depth of the sealing groove is 3 mm-9 mm; the thickness of the sealing strip is 1 mm-6 mm; the width of the sealing groove is 4 mm-10 mm.

The inner space of the shell is divided into a low-temperature low-pressure cavity and a high-temperature high-pressure cavity which are isolated from each other, the fixed disc is positioned in the low-temperature low-pressure cavity, and the bracket and the driving system are positioned in the high-temperature high-pressure cavity; the scroll comprises a fixed disc and a movable disc, and the driving system comprises a motor, an electronic part, a rotor and a driving shaft; the support comprises a main support and an auxiliary support. The periphery of the main bracket is firmly fixed on the inner wall of the shell by welding; both the air inlet and the air outlet are arranged on the compressor shell.

The controller is also provided with a temperature detector which can monitor the temperature of high-temperature and high-pressure gas which is compressed by the scroll disk and then discharged from the central exhaust port in real time, and the detected temperature is not interfered by factors such as motor heating, pipeline cooling and the like; the temperature signal is directly connected into the compressor controller, and the controller accurately adjusts the running power of the compressor according to the real-time temperature data, so that potential safety hazards caused by overhigh temperature of gas in the compressor are avoided.

Refrigerant gas enters a compression space of the movable disc and the fixed disc through an air suction port on the fixed disc, the compression space is formed by mutually meshing the fixed disc and the movable disc, a motor drives the movable disc to do plane motion with small radius around the center of the fixed disc through a driving shaft, the refrigerant gas is continuously extruded in the compression space to move towards the center of the fixed disc, the refrigerant gas is gradually compressed into high-temperature high-pressure gas along with the extrusion from the outer side of the fixed disc to the inner side of the fixed disc, and when the refrigerant gas is compressed to the center of the fixed disc, the high-temperature high-pressure gas is discharged from a central exhaust hole of the fixed disc; and the exhaust enters the sealing cavity discharged from the central exhaust port and is discharged from the exhaust port through the sealing cavity.

In the process of compressing gas by the compressor, due to the characteristics of the scroll compressor, the pressure and the temperature of the gas in the central compression cavity to the second compression cavity are continuously increased, so that the temperature of the scroll tooth wall is in a continuous descending trend along with the molded line from inside to outside, and the height of the bottom of the sealing groove is in a trend from high to low from the center to outside; therefore, the sealing strip is arranged in the sealing groove on the fixed disc, the upper end face of the sealing strip is flush, the sealing strip is thickened and heightened from the center of the vortex tooth to the outer side in a step shape, as shown in figure 1, in the process of compressing gas, the existing leakage gap at the lower part of the low-pressure side after the original sealing strip floats is sealed by the sealing strip, and the gas leakage is reduced.

The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention.