Noise reduction and oil filtering device of electric compressor and electric compressor

Abstract

The utility model discloses an electric compressor noise reduction oil filtering device and electric compressor, the electric compressor noise reduction oil filtering device comprises a sound insulation cover arranged in an exhaust cavity, the sound insulation cover is used for covering the compressor exhaust port inside, the sound insulation cover comprises an inner cover and an outer cover which are fixed together inside and outside, and micropores are uniformly distributed on the circumferential surface of the inner cover. A partition plate is fixedly connected between the inner cover and the outer cover, the plane where the partition plate is located is parallel to the back face of the static disc, the partition plate divides the space between the inner cover and the outer cover into two cavities, and the outer cover and the partition plate are both made of sound insulation plates. The high-speed airflow exhausted from the exhaust port firstly enters the inner cover and then enters the cavity between the inner cover and the outer cover through the micropores in the inner cover, sound waves can be continuously refracted and reflected in the cavity between the inner cover and the outer cover, sound wave energy is greatly weakened, and therefore the noise reduction effect is achieved. When gas passes through the micropores in the inner cover, oil drops in the gas are intercepted by the inner cover, and the gas flow is expanded and throttled for multiple times during exhausting, so that the oil filtering effect is achieved.

Description

Technical Field

[0001] This utility model relates to an electric compressor noise reduction and oil filtration device and an electric compressor, belonging to the technical field of electric compressors for automotive air conditioning. Background Technology

[0002] Currently, the compressors commonly used in automotive air conditioning systems are electric compressors. Electric compressors generate significant noise during operation and exhaust. To reduce noise, existing technologies typically install a soundproof cover inside the exhaust chamber of the electric compressor. However, since this soundproof cover is merely a simple enclosure, its sound insulation effect is limited. Furthermore, the lubricating oil mixed in with the exhaust gas flows directly from the soundproof cover into the exhaust chamber, making it impossible to filter the lubricating oil. Utility Model Content

[0003] The purpose of this invention is to provide a noise-reducing oil filtration device for electric compressors, which improves the sound insulation effect of the soundproof enclosure of electric compressors and solves the problem that existing soundproof enclosures cannot filter lubricating oil. This invention also provides an electric compressor with a noise-reducing oil filtration device.

[0004] The electric compressor noise reduction and oil filtration device of this utility model adopts the following technical solution: an electric compressor noise reduction and oil filtration device, which includes a soundproof cover set in the exhaust chamber, the soundproof cover is used to cover the compressor exhaust mask inside, the soundproof cover includes an inner cover and an outer cover fixed together, the inner cover has micropores evenly distributed on its circumferential surface, a partition is fixedly connected between the inner cover and the outer cover, the plane of the partition is parallel to the back of the stationary plate, the partition divides the space between the inner cover and the outer cover into two cavities, and both the outer cover and the partition are made of soundproof board.

[0005] The soundproof cover has a cylindrical structure at the bottom and a frustum structure at the top that gradually decreases in size from bottom to top. The outer cover and the inner cover are fixed together by bolts.

[0006] The top of the inner cover is circular, and the top of the outer cover is a ring structure that is sealed to the periphery of the top of the inner cover. The top of the inner cover and the top of the outer cover are located in the same plane, and there is an exhaust gap between the bottom of the inner cover and the back of the stationary plate.

[0007] The partition adopts a ring structure, with its outer edge integrally connected to the inner wall of the outer cover, and the inner edge of the partition sealingly fitting with the outer wall of the inner cover.

[0008] The sound insulation board is made of SPCC board with an HNBR rubber layer on the surface.

[0009] The micropores are round or hexagonal, and the diameter of the micropores is 0.5-3 mm.

[0010] The electric compressor of this utility model adopts the following technical solution: An electric compressor includes a moving plate, a stationary plate, and a rear cover disposed on the back of the stationary plate. The back of the stationary plate is provided with an exhaust port. The space between the rear cover and the stationary plate is an exhaust chamber. A sound insulation cover is provided in the exhaust chamber. The sound insulation cover is used to house the compressor exhaust mask inside. There is an exhaust gap between the bottom of the sound insulation cover and the back of the stationary plate. The sound insulation cover includes an inner cover and an outer cover that are fixed together. Micropores are evenly distributed on the circumferential surface of the inner cover. A partition is fixedly connected between the inner cover and the outer cover. The plane of the partition is parallel to the back of the stationary plate. The partition divides the space between the inner cover and the outer cover into two cavities. Both the outer cover and the partition are made of sound insulation board.

[0011] The soundproof cover adopts a cylindrical structure at the bottom and a frustum structure that gradually decreases in size from bottom to top at the top. The outer cover and the inner cover are fixed together by bolts. The top of the inner cover is circular, and the top of the outer cover is a ring structure that is sealed to the outer periphery of the top of the inner cover. The top of the inner cover and the top of the outer cover are located in the same plane. The exhaust gap is located between the bottom of the inner cover and the back of the stationary plate.

[0012] The partition adopts a ring structure, with its outer edge integrally connected to the inner wall of the outer cover, and the inner edge of the partition sealingly fitting with the outer wall of the inner cover.

[0013] The sound insulation board is made of SPCC board with an HNBR rubber layer on the surface; the micropores are round or hexagonal holes with a diameter of 0.5-3mm.

[0014] The beneficial effects of this invention are as follows: The high-speed airflow (accompanied by noise waves) discharged from the compressor exhaust port first enters the inner cover of the soundproof enclosure, and then enters the cavity between the inner and outer covers through micropores on the inner cover. The sound waves are refracted and reflected within the cavity between the inner and outer covers. Because the partition divides this cavity into two parts, the number of refractions and reflections of the sound waves continuously increases, thus significantly reducing the sound wave energy and achieving noise reduction. During the exhaust process, when the gas passes through the micropores in the inner cover, the inner cover intercepts oil droplets in the gas, achieving oil-gas separation. Simultaneously, the gas discharged from the exhaust port first expands within the soundproof enclosure, then throttles through the exhaust gap, and then enters the exhaust chamber for further expansion. After completing oil-gas separation in the exhaust chamber, it is discharged through the rear cover. Thus, the airflow undergoes multiple expansion and throttling processes during exhaust, achieving an oil filtration effect. This invention enables multiple reflections of sound waves, resulting in good sound insulation and noise reduction. It can reduce the volume of the soundproof enclosure, achieving effective sound insulation while also filtering oil, effectively utilizing the internal space of the compressor.

[0015] In a preferred embodiment, the inner and outer covers of the soundproof enclosure are connected by bolts to facilitate assembly.

[0016] In a preferred embodiment, the upper part of the soundproof cover adopts a frustum-shaped structure to facilitate its adaptation to the shape of the back cover, allowing it to be installed inside the back cover.

[0017] In a preferred embodiment, the sound insulation panel is made of SPCC board with an HNBR rubber layer on the surface, which has a good noise reduction effect.

[0018] In a preferred embodiment, the diameter of the micropores is 0.5-3 mm, which facilitates airflow while also serving as an oil-gas separator. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of an embodiment of the electric compressor noise reduction and oil filtration device installed on a stationary plate;

[0020] Figure 2 yes Figure 1 A partial sectional view;

[0021] Figure 3 yes Figure 1 Explosion diagram

[0022] Figure 4 This is a schematic diagram of an electric compressor according to an embodiment of the present invention.

[0023] In the diagram: 1-Stationary plate, 1.1-Exhaust port, 1.2-Exhaust valve plate, 2-Rear cover, 2.1-Exhaust chamber, 2.2-Oil sump, 3-Sound insulation cover, 3.1-Inner cover, 3.11-Micropores, 3.2-Outer cover, 3.22-Baffle plate, 4-Exhaust gap, 5-Bolt. Detailed Implementation

[0024] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0025] One embodiment of the electric compressor noise reduction and oil filtration device of this utility model is as follows: Figures 1 to 3 As shown, the electric compressor noise reduction and oil filtration device of this embodiment includes a soundproof cover 3 disposed in the exhaust chamber. The soundproof cover 3 is used to cover the exhaust port 1.1 of the compressor. The soundproof cover 3 includes an inner cover 3.1 and an outer cover 3.2 fixed together. Micropores 3.11 are evenly distributed on the circumferential surface of the inner cover 3.1. A partition 3.22 is fixedly connected between the inner cover 3.1 and the outer cover 3.2. The plane of the partition 3.22 is parallel to the back of the stationary plate 1. The partition divides the space between the inner cover 3.1 and the outer cover 3.2 into two cavities. Both the outer cover 3.2 and the partition 3.22 are made of soundproof board. The soundproof board is an SPCC board with an HNBR rubber layer on the surface. The micropores 3.11 are round or hexagonal holes with a diameter of 0.5-3mm.

[0026] The soundproof cover 3 has a cylindrical lower part and a truncated cone structure that gradually decreases in size from bottom to top. The outer cover 3.2 and the inner cover 3.1 are fixedly connected together by bolts 5. The top of the inner cover 3.1 is circular, and the top of the outer cover 3.2 is a ring structure that is sealed to the outer periphery of the top of the inner cover 3.1. The tops of the inner cover 3.1 and the outer cover 3.2 are located in the same plane. There is an exhaust gap 4 between the bottom of the inner cover 3.1 and the back of the stationary plate 1. The partition 3.22 has a ring structure. The outer edge of the partition 3.22 is integrally connected to the inner wall of the outer cover 3.2, and the inner edge of the partition 3.22 is sealed to the outer wall of the inner cover 3.1.

[0027] The structure of an electric compressor according to one embodiment of this utility model is as follows: Figure 4 As shown, it includes a moving plate (not shown in the figure), a stationary plate 1, and a rear cover 2 disposed on the back of the stationary plate 1. The back of the stationary plate 1 is provided with an exhaust port 1.1, and an exhaust valve plate 1.2 is installed at the exhaust port. The space between the rear cover 2 and the stationary plate 1 is an exhaust chamber 2.1. A soundproof cover 3 is provided inside the exhaust chamber 2.1. The soundproof cover 3 is used to cover the exhaust port 1.1. There is an exhaust gap 4 between the bottom of the soundproof cover 3 and the back of the stationary plate 1. The soundproof cover 3 includes an inner cover 3.1 and an outer cover 3.2 fixed together. Micropores 3.11 are evenly distributed on the circumferential surface of the inner cover 3.1. A partition plate 3.22 is fixedly connected between the inner cover 3.1 and the outer cover 3.2. The plane of the partition plate 3.22 is parallel to the back of the stationary plate 1. The partition plate 3.22 divides the space between the inner cover 3.1 and the outer cover 3.2 into two cavities. The outer cover 3.2 and the partition plate 3.22 are both made of soundproof board. The sound insulation board is made of SPCC board with an HNBR rubber layer on the surface; the micropores 3.11 are round or hexagonal holes with a diameter of 0.5-3mm.

[0028] The soundproof cover 3 has a cylindrical lower part and a truncated cone structure that gradually decreases in size from bottom to top. The outer cover 3.2 and the inner cover 3.1 are fixed together by bolts. The top of the inner cover 3.1 is circular, and the top of the outer cover 3.2 is a ring structure that is sealed to the outer periphery of the top of the inner cover 3.1. The tops of the inner cover 3.1 and the outer cover 3.2 are located in the same plane. The exhaust gap 4 is located between the bottom of the inner cover 3.1 and the back of the stationary plate 1. The partition 3.22 has a ring structure, and the outer edge of the partition 3.22 is integrally connected to the inner wall of the outer cover 3.2. The inner edge of the partition 3.22 is sealed to the outer wall of the inner cover 3.1.

[0029] When the compressor is running, the high-speed airflow (accompanied by noise waves) discharged from the compressor exhaust port 1.1 first enters the inner cover of the soundproof cover 3, and then enters the cavity between the inner cover 3.1 and the outer cover 3.2 through the micropores 3.11 on the inner cover 3.1. The sound waves are continuously refracted and reflected in the cavity between the inner cover 3.1 and the outer cover 3.2, and the sound wave energy is greatly reduced, thereby achieving the effect of noise reduction. During this process, when the gas passes through the micropores 3.11 in the inner cover 3.1, the inner cover 3.1 intercepts the oil droplets in the gas, playing a role in oil-gas separation. At the same time, the gas discharged from the exhaust port 1.1 first expands in the soundproof cover 3, then is throttled through the exhaust gap 4, and then enters the exhaust chamber 2.1 for expansion. After completing oil-gas separation in the exhaust chamber 2.1, it is discharged from the rear cover. Thus, the airflow undergoes multiple expansion and throttling processes during exhaust, thereby achieving the effect of oil filtration. The bottom of the exhaust chamber 2.1 is also equipped with an oil sump 2.2, into which the lubricating oil accumulated in the soundproof cover and the lubricating oil separated by oil and gas can be discharged.

[0030] In summary, this invention enables sound waves to be reflected multiple times, resulting in excellent sound insulation and noise reduction. It also reduces the size of the soundproof enclosure, effectively filtering oil while providing sound insulation, and efficiently utilizing the internal space of the compressor.

[0031] The embodiments and descriptions above are merely illustrative of the principles of this utility model. Various changes and modifications may be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of this utility model as claimed.

Claims

1. A noise reduction oil filter device for an electric compressor, comprising a soundproof cover arranged in an exhaust cavity, the soundproof cover being arranged for covering a compressor exhaust port, characterized in that: The soundproof cover comprises an inner cover and an outer cover fixed together, the inner cover is provided with micro-holes on the circumferential surface, a partition plate is fixedly connected between the inner cover and the outer cover, the plane of the partition plate is parallel to the back surface of the static disc, the space between the inner cover and the outer cover is divided into two cavities by the partition plate, and the outer cover and the partition plate are made of soundproof boards.

2. The electric compressor noise reduction oil filter device of claim 1, wherein: The soundproof cover has a cylindrical structure at the lower part and a circular table structure gradually reduced from bottom to top at the upper part, and the outer cover and the inner cover are fixedly connected together by bolts.

3. The electric compressor noise reduction oil filter device of claim 2, wherein: The top of the inner cover is circular, the top of the outer cover is an annular structure sealingly connected to the periphery of the top of the inner cover, the top of the inner cover and the top of the outer cover are located in the same plane, and the exhaust gap is between the bottom of the inner cover and the back surface of the static disc.

4. The electric compressor noise reduction oil filter device of claim 2, wherein: The partition plate has an annular structure, the outer edge of the partition plate is integrally connected to the inner wall of the outer cover, and the inner edge of the partition plate is sealingly matched with the outer wall of the inner cover.

5. The electric compressor noise reduction oil filtration device of claim 1, wherein: The soundproof board is an spcc board with an HNBR rubber layer on the surface.

6. The electric compressor noise reduction oil filtration device of claim 1, wherein: The micro-holes are circular holes or hexagonal holes, and the diameter of the micro-holes is 0.5-3 mm.

7. An electric compressor comprising a moving disc, a stationary disc and a back cover arranged on the back of the stationary disc, the back of the stationary disc being provided with an exhaust port, the space between the back cover and the stationary disc being an exhaust cavity, and a soundproof cover being arranged in the exhaust cavity for covering the compressor exhaust port, characterized in that: The soundproof cover comprises an inner cover and an outer cover fixed together, the inner cover is provided with micro-holes on the circumferential surface, a partition plate is fixedly connected between the inner cover and the outer cover, the plane of the partition plate is parallel to the back surface of the static disc, the space between the inner cover and the outer cover is divided into two cavities by the partition plate, and the outer cover and the partition plate are made of soundproof boards.

8. The electric compressor of claim 7, wherein: The soundproof cover has a cylindrical structure at the lower part and a circular table structure gradually reduced from bottom to top at the upper part, and the outer cover and the inner cover are fixedly connected together by bolts.

9. The electric compressor of claim 8, wherein: The top of the inner cover is circular, the top of the outer cover is an annular structure sealingly connected to the periphery of the top of the inner cover, the top of the inner cover and the top of the outer cover are located in the same plane, and the exhaust gap is between the bottom of the inner cover and the back surface of the static disc.

10. The electric compressor of claim 7, wherein: The partition plate has an annular structure, the outer edge of the partition plate is integrally connected to the inner wall of the outer cover, and the inner edge of the partition plate is sealingly matched with the outer wall of the inner cover. The soundproof board is an spcc board with an HNBR rubber layer on the surface. The micro-holes are circular holes or hexagonal holes, and the diameter of the micro-holes is 0.5-3 mm.

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