Two-stage efficient air compressor

Abstract

The utility model discloses a two-stage high-efficiency air compressor which comprises a shell, a rear mounting cavity is formed in the rear end of the shell, a middle mounting cavity is formed in the middle of the shell, and a front mounting face is formed on the front end face of the shell. The motor is mounted in the rear mounting cavity, and an output shaft of the motor extends into the middle mounting cavity; the piston assembly is mounted in the middle mounting cavity and is in transmission connection with the motor; an inner tank mounted on the front mounting surface; the outer side tank is mounted on the front mounting surface and sleeves the inner side tank; a plurality of air holes are formed in the front mounting surface covered by the inner side tank, and a plurality of air holes are also formed in the front mounting surface covered by the outer side tank and outside the front mounting surface covered by the inner side tank; and a drying medium is arranged in the inner side tank or in a cavity between the outer side tank and the inner side tank. The drying agent is ventilated by the two-stage compressed high-pressure gas in the exhaust work, and slag is discharged from the filter, so that the air in the air compressor is always kept high in quality, and the service life of a product is prolonged.

Description

Technical Field

[0001] The utility model belongs to the field of air spring accessories, and particularly relates to a two-stage high-efficiency air compressor. Background Art

[0002] In the prior art, for an air compressor with a dryer and a filter, the working mode is that the input air enters the dryer and the filter to remove water vapor and dust particles. However, after the air compressor works for a period of time, water vapor is likely to accumulate in the dryer and dust particles accumulate in the filter. If not replaced in time, the working efficiency of the dryer and the filter will be reduced; and there is no action to ventilate the desiccant and discharge impurities from the filter before each inflation. The accumulated dust particles will affect the quality of the high-pressure gas in the air suspension airbag and thus affect the service life of the air suspension airbag. Summary of the Invention

[0003] The purpose of the utility model is to provide a two-stage high-efficiency air compressor, which ventilates the desiccant and discharges slag from the filter during the exhaust work, improves the air in the air compressor to always maintain high quality, and prolongs the service life of the product.

[0004] To solve the above technical problems, the utility model adopts the following technical scheme: A two-stage high-efficiency air compressor, which comprises:

[0005] A housing, the rear end of the housing forms a rear installation cavity, the middle part forms a middle installation cavity, and a front installation surface is formed on the front end surface;

[0006] A motor, which is installed in the rear installation cavity and the output shaft extends into the middle installation cavity;

[0007] A piston assembly, which is installed in the middle installation cavity and is in transmission connection with the motor;

[0008] An inner tank, which is installed on the front installation surface;

[0009] An outer tank, which is installed on the front installation surface and sleeved on the inner tank;

[0010] A plurality of air holes are provided on the front installation surface covered by the inner tank, and a plurality of air holes are also provided on the front installation surface covered by the outer tank and at positions outside the front installation surface covered by the inner tank;

[0011] A drying medium is provided inside the inner tank or in the cavity between the outer tank and the inner tank.

[0012] In another embodiment, the drying medium is provided inside the inner tank, and a first partition plate for extending the flow path of the gas inside the inner tank is provided inside the inner tank.

[0013] Another embodiment is that a first partition plate is arranged along the axis of the inner tank and divides the interior of the inner tank into a lower cavity and an upper cavity. A plurality of air holes are also provided on the front end portion of the first partition plate, so that an air flow forms a U-shaped flow path inside the inner tank.

[0014] Another embodiment is that a plurality of air holes on the front mounting surface covered by the inner tank include a first air hole and a second air hole. The first air hole and the second air hole are located on the front mounting surface covered by the upper cavity, and a third air hole is provided on the side wall of the inner tank forming the lower cavity.

[0015] Another embodiment is that a fourth air hole communicating with the atmosphere is provided on the housing, and an air filter is provided on the fourth air hole.

[0016] Another embodiment is that the fourth air hole is formed at a position slightly below the rear end portion of the housing. A second partition plate is provided inside the rear end portion of the housing. The second partition plate is arranged on the front side of the fourth air hole and enables the air flow to form a flow path from bottom to top after entering the housing.

[0017] Another embodiment is that a fifth air hole communicating with the cavity between the outer tank and the inner tank is provided on the front mounting surface. A plurality of solenoid valves are arranged in parallel on the fifth air hole. The solenoid valves control the on and off of the gas discharged from the fifth air hole entering the air suspension airbag or the gas in the air suspension airbag entering the gas path inside the outer tank through the fifth air hole.

[0018] Another embodiment is that the piston assembly includes a crankshaft, a primary piston, and a secondary piston. The crankshaft is connected to the output shaft of the motor. The primary piston is rotatably connected to the crankshaft, and the secondary piston is pivotally connected to the primary piston. The middle mounting cavity is divided into a primary chamber, a secondary chamber, and a middle chamber located between the primary chamber and the earphone chamber. The primary piston reciprocates in the primary chamber, and the secondary piston reciprocates in the secondary chamber.

[0019] Another embodiment is that the first air hole communicates with the secondary chamber, and a solenoid valve is provided on the first air hole; the second air hole communicates with the middle chamber, and a solenoid valve is provided on the second air hole; the middle chamber communicates with the inside of the rear end portion of the housing and then communicates with the fourth air hole; the secondary chamber and the primary chamber are connected through a connecting pipe.

[0020] The beneficial effects of the present utility model are as follows: The double-stage compressed high-pressure gas ventilates the desiccant and discharges slag from the filter during the exhaust operation, improving the air quality inside the air compressor and prolonging the service life of the product. Description of the Drawings

[0021] Figure 1Schematic diagram of the air flow direction during the inflation process of the present utility model;

[0022] Figure 2 Schematic diagram of the air flow direction during the exhaust process of the present utility model. Detailed implementation manner

[0023] The following makes a detailed description of the present utility model in conjunction with the embodiments shown in the accompanying drawings:

[0024] As Figure 1-2 shown, a two-stage high-efficiency air compressor includes: a housing 1, a motor 2, a piston assembly 3, an inner tank 4, an outer tank 5, and an air filter 6. A drying medium is provided inside the inner tank 4 or in the cavity between the outer tank 5 and the inner tank 4. In this embodiment, the drying medium is provided inside the inner tank 4 to form an air dryer together with the inner tank 4.

[0025] The rear end portion of the housing 1 forms a rear mounting cavity 11, the middle portion forms a middle mounting cavity 12, and a front mounting surface 13 is formed on the front end surface.

[0026] The inner tank 4 is mounted on the front mounting surface 13; the outer tank 5 is mounted on the front mounting surface 13 and sleeved on the inner tank 4; a plurality of air holes are provided on the front mounting surface 13 covered by the inner tank 4, and a plurality of air holes are also provided on the front mounting surface 13 covered by the outer tank 5 and at positions outside the front mounting surface 13 covered by the inner tank 4. The drying medium is provided inside the inner tank 4, and a first partition plate 41 for extending the flow path of the gas inside the inner tank 4 is provided inside the inner tank 4. The first partition plate 41 is arranged along the axis of the inner tank 4 and divides the inner part of the inner tank 4 into a lower cavity 4A and an upper cavity 4B. A plurality of air holes, which are the sixth air holes 46, are also provided on the front end portion of the first partition plate 41, so that the air flow forms a U-shaped flow path inside the inner tank 4. The plurality of air holes on the front mounting surface 13 covered by the inner tank 4 include a first air hole 131 and a second air hole 132. The first air hole 131 and the second air hole 132 are located on the front mounting surface 13 covered by the upper cavity 4B, and a third air hole 43 is provided on the side wall of the inner tank 4 forming the lower cavity 4A. A fourth air hole 14 communicating with the atmosphere is provided on the housing 1, and the air filter 6 is provided on the fourth air hole 14. The fourth air hole 14 is formed at a position slightly below the rear end portion of the housing 1, and a second partition plate 15 is provided inside the rear end portion of the housing 1. The second partition plate 15 is provided on the front side of the fourth air hole 14 and makes the air flow form a flow path from bottom to top after entering the housing 1.

[0027] The motor 2 is installed in the rear installation cavity 11 and its output shaft extends into the middle installation cavity 12; the piston assembly 3 is installed in the middle installation cavity 12 and is in transmission connection with the motor 2; the piston assembly 3 includes a crankshaft 33, a first-stage piston 31 and a second-stage piston 32. The crankshaft 33 is connected to the output shaft of the motor 2. The first-stage piston 31 is rotatably connected to the crankshaft 33, and the second-stage piston 32 is pivotally connected to the first-stage piston 31. The middle installation cavity 12 is divided into a first-stage chamber 121, a second-stage chamber 122 and a middle chamber 123 located between the first-stage chamber 121 and the earphone chamber. The first-stage piston 31 reciprocates in the first-stage chamber 121, and the second-stage piston 32 reciprocates in the second-stage chamber 122. The first air hole 131 communicates with the second-stage chamber 122, and a solenoid valve is provided on the first air hole 131. This solenoid valve is the first solenoid valve D1, and the first solenoid valve D1 is a one-way solenoid valve. When opened, it can only allow air to enter the inner tank 4 from the second-stage chamber 122; the second air hole 132 communicates with the middle chamber 123, and a solenoid valve is provided on the second air hole 132. This solenoid valve is the second solenoid valve D2, and the second solenoid valve D2 is a one-way solenoid valve. When opened, it can only allow air to enter the middle chamber 123 from the inner tank 4; a through hole 125 communicating the first-stage chamber 121 and the middle chamber 123 is formed on the first-stage piston 31. The middle chamber 123 is connected to the inside of the rear end of the housing 1 through the seventh air hole 17, and then communicates with the fourth air hole 14; the second-stage chamber 122 and the first-stage chamber 121 are connected through a connecting pipe 124. The connecting pipe 124 can be a channel formed in the housing 1 or an externally connected pipeline.

[0028] A fifth air hole 135 communicating with the cavity between the outer tank 5 and the inner tank 4 is provided on the front mounting surface 13. A plurality of solenoid valves are arranged in parallel on the fifth air hole 135. These solenoid valves are the fifth solenoid valves D5. The fifth solenoid valves D5 control the on and off of the air path for the gas discharged from the fifth air hole 135 to enter the air suspension airbag 0 or for the gas in the air suspension airbag 0 to enter the outer tank 5 through the fifth air hole 135.

[0029] As Figure 1 shown, during the inflation process, the gas flows through in sequence: atmosphere → air filter 6 → fourth air hole 14 → rear installation cavity 11 → seventh air hole 17 → middle chamber 123 → through hole 125 → first-stage chamber 121 → connecting pipe 124 → air storage tank → second-stage chamber 122 → first air hole 131 → upper cavity 4B → sixth air hole 46 → lower cavity 4B → third air hole 43 → outer tank 5 → fifth air hole 135 → airbag 0; As Figure 2As shown in the figure, during the exhaust process, the gas flows through the following components in sequence: airbag 0 → fifth air hole 135 → outer tank 5 → third air hole 43 → lower cavity 4B → sixth air hole 46 → upper cavity 4B → second air hole 132 → middle chamber 123 → seventh air hole 17 → rear installation cavity 11 → fourth air hole 14 → air filter 6 → the atmosphere. When the air compressor is inflating, high-quality air can be obtained after the atmosphere passes through the air filter and the air dryer, avoiding direct contact between the atmosphere and the internal parts of the compressor, which may cause corrosion and failure of the parts and reduce the service life of the compressor. When the air compressor is exhausting, the second solenoid valve D2 is opened, and the high-pressure gas in the outer tank passes through the air dryer and then back blows the air filter, discharging the particulate dust and various suspended substances collected during the inflation process in the air filter into the atmosphere. In the present utility model, during exhaust, the high-pressure ventilation carries out the water vapor in the air dryer and the dust particles and various suspended substances in the air filter, quickly restoring the moisture absorption performance of the desiccant and the performance of the air filter for filtering particulate dust. It is ensured that in each charging and discharging cycle, the air dryer and the air filter can maximize their functions, improving the working efficiency of the compressor and the service life of the internal components of the compressor.

[0030] The above embodiments are only used to illustrate the technical concept and features of the present utility model, and their purpose is to enable those who are familiar with this technology to understand the content of the present utility model and implement it accordingly, and it should not be used to limit the protection scope of the present utility model. All equivalent changes or modifications made according to the spirit of the present utility model should be covered within the protection scope of the present utility model.

Claims

1. A two-stage high-efficiency air compressor, comprising: A housing, wherein a rear end portion of the housing forms a rear mounting cavity, a middle portion forms a middle mounting cavity, and a front end surface forms a front mounting surface; a motor, which is mounted in the rear mounting cavity and whose output shaft extends into the middle mounting cavity; A piston assembly, which is installed in the middle installation cavity and is drivingly connected to the motor; an inner tank mounted on the front mounting surface; An outer tank, which is mounted on the front mounting surface and sleeved on the inner tank; The front mounting surface covered by the inner tank is provided with a plurality of air holes, and the front mounting surface covered by the outer tank is also provided with a plurality of air holes at positions other than the front mounting surface covered by the inner tank; The invention is characterized in that a drying medium is arranged inside the inner tank or in the cavity between the outer tank and the inner tank.

2. The two-stage high-efficiency air compressor according to claim 1 is characterized in that: The drying medium is arranged in the inner tank, and a first partition plate for extending the flow path of the gas in the inner tank is arranged in the inner tank.

3. The two-stage high-efficiency air compressor according to claim 2 is characterized in that: A first partition plate is arranged along the axis of the inner tank and divides the interior of the inner tank into a lower cavity and an upper cavity. A plurality of air holes are also arranged on the front end of the first partition plate.

4. The two-stage high-efficiency air compressor according to claim 3 is characterized in that: The plurality of air holes on the front mounting surface covered by the inner tank include a first air hole and a second air hole, wherein the first air hole and the second air hole are located on the front mounting surface covered by the upper cavity, and a third air hole is provided on the side wall of the inner tank forming the lower cavity.

5. The two-stage high-efficiency air compressor according to claim 2 is characterized in that: The shell is provided with a fourth air hole connected to the atmosphere, and the fourth air hole is provided with an air filter.

6. The two-stage high-efficiency air compressor according to claim 5, characterized in that: The fourth air hole is formed at a lower position of the rear end portion of the shell, and a second partition plate is provided in the rear end portion of the shell. The second partition plate is provided at the front side of the fourth air hole and allows the airflow to form a flow path from bottom to top after entering the shell.

7. The two-stage high-efficiency air compressor according to claim 2 is characterized in that: The front mounting surface is provided with a fifth air hole connected with the cavity between the outer tank and the inner tank, and a plurality of solenoid valves are arranged in parallel on the fifth air hole.

8. The two-stage high-efficiency air compressor according to claim 4 is characterized in that: The piston assembly includes a crankshaft, a primary piston and a secondary piston. The crankshaft is connected to the output shaft of the motor, the primary piston is rotatably connected to the crankshaft, and the secondary piston is pivotally connected to the primary piston. The middle mounting cavity is divided into a primary chamber, a secondary chamber and a middle chamber located between the primary chamber and the earphone chamber. The primary piston reciprocates in the primary chamber, and the secondary piston reciprocates in the secondary chamber.

9. The two-stage high-efficiency air compressor according to claim 8, characterized in that: The first air hole is connected to the secondary chamber, and a solenoid valve is provided on the first air hole; the second air hole is connected to the middle chamber, and a solenoid valve is provided on the second air hole; the middle chamber is connected to the inner side of the rear end of the shell, and further connected to the fourth air hole; the secondary chamber and the primary chamber are connected through a connecting pipe.

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