Vacuum pump waterproof device and automobile

Abstract

The present invention discloses a vacuum pump waterproofing device, comprising a muffler, a front exhaust pipe connected to the vacuum pump and to the lower end of the muffler, and a rear exhaust pipe connected to the upper end of the muffler. The front exhaust pipe is a U-shaped pipe, and the exhaust port of the rear exhaust pipe is higher than the height of the vacuum pump. The vacuum pump waterproofing device of the present invention utilizes an S-shaped pipeline, a muffler, and a fixing sleeve. While providing dust and water protection, it effectively reduces exhaust port noise during operation of the vacuum pump, improving waterproofing and noise reduction. It also considers vibration transmission throughout the pipeline, meeting the driver's requirements for off-road wading performance and passenger comfort. The present invention also discloses a vehicle.

Description

Technical Field

[0001] The present invention belongs to the technical field of automobile parts, and in particular relates to a vacuum pump waterproof device and an automobile. Background Art

[0002] With increasingly stringent national emissions and fuel consumption regulations, traditional fuel vehicles are trending towards turbocharged and miniaturized engines. New energy vehicles, including hybrid and pure electric vehicles, are also gaining momentum. Due to insufficient vacuum sources in the brake boosters of these vehicles, all require electronic vacuum pumps to provide auxiliary vacuum. Consumers' increasing demands for off-road performance and in-car comfort are also placing new demands on the water wading depth and noise level of electronic vacuum pumps.

[0003] The exhaust port of current electronic vacuum pumps is typically located in the middle of the pump body. To protect against water and dust, some technicians use dust covers on the exhaust ports of vacuum pumps. For example, patent publication number CN 204200512 U discloses a vacuum pump designed to prevent the backflow of debris from the exhaust port. While this reduces dust ingress to some extent, it fails to increase the water depth and does not effectively prevent water from entering the pump.

[0004] Another solution is to add a U-shaped pipe to the exhaust port of the electronic vacuum pump. For example, patent document with publication number CN207080367U discloses an electronic vacuum pump waterproof structure and a car. Although the U-shaped pipe increases the wading height, the noise of the exhaust port is not reduced, and the pipe fixing method is not reflected. Therefore, it cannot meet the wading depth and passenger comfort requirements of off-road driving at the same time. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a vacuum pump waterproof device, the purpose of which is to improve waterproof and noise reduction effects.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: a vacuum pump waterproof device, including a muffler, an exhaust front pipe connected to the vacuum pump and connected to the lower end of the muffler, and an exhaust rear pipe connected to the upper end of the muffler, the exhaust front pipe is a U-shaped pipe, and the height of the exhaust port of the exhaust rear pipe is greater than the height of the vacuum pump.

[0007] The exhaust front pipe includes a first exhaust section, a second exhaust section and a third exhaust section connected in sequence, the upper end of the first exhaust section is connected to the vacuum pump, the upper end of the third exhaust section is connected to the lower end of the muffler, and the second exhaust section is connected to the lower end of the first exhaust section and the lower end of the third exhaust section.

[0008] The length direction of the first exhaust section is parallel to the length direction of the third exhaust section, and the length of the first exhaust section is smaller than the length of the third exhaust section.

[0009] The exhaust rear pipe is a U-shaped pipe, and the exhaust rear pipe includes a fourth exhaust section, a fifth exhaust section and a sixth exhaust section connected in sequence. The lower end of the fourth exhaust section is connected to the upper end of the muffler, and the fifth exhaust section is connected to the upper end of the fourth exhaust section and the upper end of the sixth exhaust section.

[0010] The length direction of the fourth exhaust section is parallel to the length direction of the sixth exhaust section.

[0011] The interior of the silencer is provided with a first chamber, a second chamber, a third chamber, a fourth chamber and a fifth chamber in sequence along the direction of gas flow. The cross-sectional area of ​​the first chamber gradually increases along the direction of gas flow, the cross-sectional area of ​​the second chamber gradually decreases along the direction of gas flow, the cross-sectional area of ​​the fourth chamber gradually increases along the direction of gas flow, and the cross-sectional area of ​​the fifth chamber gradually decreases along the direction of gas flow.

[0012] The first chamber and the second chamber are symmetrically arranged, and the fourth chamber and the fifth chamber are symmetrically arranged.

[0013] The cross-sectional area of ​​the third chamber remains unchanged along the gas flow direction, and the cross-sectional area of ​​the third chamber is the same as the minimum cross-sectional area of ​​the second chamber and the minimum cross-sectional area of ​​the fourth chamber.

[0014] The vacuum pump waterproof device further comprises a fixing sleeve arranged on the muffler, and the fixing sleeve is made of rubber material.

[0015] The present invention also provides an automobile comprising the above-mentioned vacuum pump waterproof device.

[0016] The vacuum pump waterproof device of the present invention utilizes an S-shaped pipeline, a muffler and a fixing sleeve at the same time. While solving the dust and water prevention problems, it effectively reduces the exhaust port noise when the vacuum pump is working, improves the waterproof and noise reduction effects, and also takes into account the vibration transmission of the entire pipeline, meeting the driver's requirements for off-road wading performance and passenger comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the vacuum pump waterproof device of the present invention;

[0018] Figure 2 It is a cross-sectional view of the muffler;

[0019] The marks in the above figures are: 1. Vacuum pump; 2. Exhaust front pipe; 201. First exhaust section; 202. Second exhaust section; 203. Third exhaust section; 3. Muffler; 301. First chamber; 302. Second chamber; 303. Third chamber; 304. Fourth chamber; 305. Fifth chamber; 4. Fixed sleeve; 5. Exhaust rear pipe; 501. Fourth exhaust section; 502. Fifth exhaust section; 503. Sixth exhaust section. DETAILED DESCRIPTION

[0020] The following is a further detailed description of the specific implementation methods of the present invention through the description of embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solution of the present invention and to facilitate its implementation.

[0021] It should be noted that, in the following embodiments, the "first", "second", "third", "fourth" and "fifth" do not represent an absolute distinction in structure and / or function, nor do they represent a sequence of execution, but are merely for the convenience of description.

[0022] like Figure 1 As shown, the present invention provides a vacuum pump waterproof device, including a muffler 3, an exhaust front pipe 2 connected to the vacuum pump and connected to the lower end of the muffler 3, and an exhaust rear pipe 5 connected to the upper end of the muffler 3. The exhaust front pipe 2 is a U-shaped pipe, and the height of the exhaust port of the exhaust rear pipe 5 is greater than the height of the vacuum pump.

[0023] Specifically, if Figure 1 As shown, the exhaust front pipe 2 is connected to the vacuum pump's exhaust port, which points vertically downward. The exhaust front pipe 2, muffler 3, and exhaust rear pipe 5 form an S-shaped exhaust line, which guides upward to increase the vacuum pump's wading depth. The muffler 3 is designed into the line to throttle and reduce noise. The vacuum pump can be used in traditional turbocharged engine fuel vehicles, as well as new energy hybrid and pure electric vehicles, but is not limited to these applications. The vacuum pump is an electronic, vane-type vacuum pump.

[0024] like Figure 1As shown, the exhaust front pipe 2 is directly connected to the exhaust port of the vacuum pump and is part of the entire S-shaped exhaust pipeline. Its U-shaped structure guides upward, increasing the wading height of the vacuum pump. At the same time, the U-shaped exhaust front pipe 2 can partially reduce the exhaust flow rate, thereby reducing noise. The exhaust front pipe 2 includes a first exhaust section 201, a second exhaust section 202, and a third exhaust section 203 connected in sequence. The upper end of the first exhaust section 201 is connected to the exhaust port of the vacuum pump, the upper end of the third exhaust section 203 is connected to the lower end of the muffler 3, and the second exhaust section 202 is connected to the lower ends of the first exhaust section 201 and the third exhaust section 203. The length direction of the first exhaust section 201 is parallel to the length direction of the third exhaust section 203, and the length of the first exhaust section 201 is less than the length of the third exhaust section 203. The first exhaust section 201, the second exhaust section 202 and the third exhaust section 203 are all circular tubes. The axis of the second exhaust section 202 is perpendicular to the axes of the first exhaust section 201 and the third exhaust section 203. The first exhaust section 201 extends toward the bottom of the exhaust port of the vacuum pump, and the third exhaust section 203 extends toward the top of the second exhaust section 202. The gas discharged from the exhaust port of the vacuum pump flows through the first exhaust section 201, the second exhaust section 202 and the third exhaust section 203 in sequence, and finally enters the muffler 3.

[0025] like Figure 1 As shown, the exhaust rear pipe 5 is connected to the muffler 3 and is part of the entire S-shaped exhaust pipeline. It adopts an inverted U-shaped structure, with the exhaust port pointing vertically downward. It is also designed with an L-shaped edge guard to effectively prevent dust from entering. The exhaust rear pipe 5 is a U-shaped pipe and includes a fourth exhaust section 501, a fifth exhaust section 502, and a sixth exhaust section 503 connected in sequence. The lower end of the fourth exhaust section 501 is connected to the upper end of the muffler 3, and the fifth exhaust section 502 is connected to the upper ends of the fourth exhaust section 501 and the upper ends of the sixth exhaust section 503. The length direction of the fourth exhaust section 501 is parallel to the length direction of the sixth exhaust section 503. The fourth exhaust section 501, the fifth exhaust section 502 and the sixth exhaust section 503 are all circular tubes. The axis of the fifth exhaust section 502 is perpendicular to the axes of the fourth exhaust section 501 and the sixth exhaust section 503. The fourth exhaust section 501 extends toward the top of the muffler 3, and the sixth exhaust section 503 extends toward the bottom of the fifth exhaust section 502. The gas discharged from the outlet of the muffler 3 flows through the fourth exhaust section 501, the fifth exhaust section 502 and the sixth exhaust section 503 in turn, and is finally discharged into the atmosphere. The fourth exhaust section 501 is coaxially arranged with the third exhaust section 203. The upper end of the third exhaust section 203 is connected to the air inlet of the muffler 3. The lower end of the fourth exhaust section 501 is connected to the air outlet of the muffler 3. The axis of the fifth exhaust section 502 is parallel to the axis of the second exhaust section 202. The air outlet of the sixth exhaust section 503 is connected to the atmospheric environment. The height of the air outlet of the sixth exhaust section 503 is greater than the height of the exhaust port of the vacuum pump.

[0026] like Figure 1 and Figure 2 As shown, the muffler 3 has a cylindrical shape. Inside the muffler 3, a first chamber 301, a second chamber 302, a third chamber 303, a fourth chamber 304, and a fifth chamber 305 are sequentially arranged along the gas flow direction. The cross-sectional area of ​​the first chamber 301 gradually increases along the gas flow direction, the cross-sectional area of ​​the second chamber 302 gradually decreases along the gas flow direction, the cross-sectional area of ​​the fourth chamber 304 gradually increases along the gas flow direction, and the cross-sectional area of ​​the fifth chamber 305 gradually decreases along the gas flow direction. The first chamber 301, the second chamber 302, the third chamber 303, the fourth chamber 304, and the fifth chamber 305 are arranged sequentially along the axial direction of the muffler 3. The muffler 3 is coaxial with the third exhaust section 203 and the fourth exhaust section 501, and the axis of the muffler 3 is a vertical line. The lower opening of the muffler 3 is the air inlet, and the upper opening of the muffler 3 is the air outlet. The air inlet of the muffler 3 is located below the first chamber 301 and is connected to the first chamber 301. The air outlet of the muffler 3 is located above the fifth chamber 305 and is connected to the fifth chamber 305.

[0027] like Figure 1 and Figure 2As shown, preferably, the first chamber 301 and the second chamber 302 are arranged symmetrically, and the fourth chamber 304 and the fifth chamber 305 are arranged symmetrically. The cross-sectional area of ​​the third chamber 303 remains unchanged along the gas flow direction, and the cross-sectional area of ​​the third chamber 303 is the same as the minimum cross-sectional area of ​​the second chamber 302 and the minimum cross-sectional area of ​​the fourth chamber 304. The minimum cross-sectional area of ​​the first chamber 301 is located below the maximum cross-sectional area of ​​the first chamber 301, and the maximum cross-sectional area of ​​the second chamber 302 is located below the minimum cross-sectional area of ​​the second chamber 302. The cross-sectional area of ​​the maximum cross-sectional area of ​​the first chamber 301 is the same as the cross-sectional area of ​​the maximum cross-sectional area of ​​the second chamber 302, and the cross-sectional area of ​​the minimum cross-sectional area of ​​the second chamber 302 is the same as the cross-sectional area of ​​the third chamber 303. The minimum cross-sectional area of ​​the fourth chamber 304 is located below the maximum cross-sectional area of ​​the fourth chamber 304. The maximum cross-sectional area of ​​the fifth chamber 305 is located below the minimum cross-sectional area of ​​the fifth chamber 305. The cross-sectional area of ​​the maximum cross-sectional area of ​​the fourth chamber 304 is equal to the cross-sectional area of ​​the maximum cross-sectional area of ​​the fifth chamber 305, and the cross-sectional area of ​​the minimum cross-sectional area of ​​the fourth chamber 304 is equal to the cross-sectional area of ​​the third chamber 303. The third chamber 303 is located at the center of the muffler 3. The first chamber 301, the second chamber 302, the third chamber 303, the fourth chamber 304, and the fifth chamber 305 are coaxially arranged. The first chamber 301, the second chamber 302, the third chamber 303, the fourth chamber 304, and the fifth chamber 305 are connected to form an exhaust passage within the muffler 3.

[0028] With the muffler 3 of the above structure, due to the change in the internal cross-section of the muffler 3, when the gas flows through the muffler 3, the gas fully rubs and collides with the inner wall of the exhaust channel inside the muffler 3, converting the sound energy into heat energy and consuming it, thereby achieving resistive silence and further reducing the exhaust noise of the vacuum pump.

[0029] like Figure 1 As shown, the vacuum pump waterproof device of the present invention also includes a fixing sleeve 4 provided on the muffler 3, and the fixing sleeve 4 is made of rubber material. The fixing sleeve 4 is mounted on the muffler 3 to facilitate fixing the entire waterproof device. The fixing sleeve 4 made of rubber also plays a certain degree of vibration reduction role. The height of the air inlet of the muffler 3 is greater than the height of the exhaust port of the vacuum pump. The fixing sleeve 4 is used to be installed on the vibration reduction bracket provided on the car body. Since the fixing sleeve 4 is at the upper end of the entire pipeline and is at the optimal structural strength, the fixing sleeve 4 is installed in the middle part of the muffler 3 to provide a mounting hole. The entire fixing sleeve 4 is made of vibration-damping rubber material, which effectively blocks the vibration and noise transmission of the pipeline, and ultimately reduces the vibration and noise transmission of the entire exhaust pipeline of the vacuum pump.

[0030] When an electronic vacuum pump stops working, a vacuum is briefly formed in the working chamber. If the vacuum pump exhaust port is underwater at this time, it may cause backdraft. If water or muddy water enters the working chamber for a long time and in large quantities, the vacuum pump motor, blades, and bearings are at great risk of damage. Therefore, by guiding the S-shaped exhaust pipe, the position of the vacuum pump exhaust port is greatly raised, increasing the wading depth. Even if the vacuum pump stops working and a vacuum environment exists, the exhaust port is kept away from water and muddy water, effectively preventing backdraft.

[0031] When the driver brakes frequently and the electronic vacuum pump operates at high speed, exhaust noise is easily generated due to the high flow rate at the exhaust port. By adding an S-shaped exhaust pipe to the vacuum pump's exhaust port, the exhaust flow rate is reduced, thereby reducing some of the noise. At the same time, a muffler 3 is designed in the middle of the S-shaped exhaust pipe. Muffler 3 consists of three sections with varying cross-sections. The gas undergoes sufficient friction and collision on the inner wall of the channel, converting sound energy into heat energy and dissipating it, thus achieving resistive silencer and further reducing vacuum pump exhaust noise.

[0032] The present invention also provides a car, including the vacuum pump waterproof device of the above structure. The specific structure of the vacuum pump waterproof device can be referred to Figure 1 and Figure 2 Since the automobile of the present invention includes the vacuum pump waterproof device in the above embodiment, it has all the advantages of the above vacuum pump waterproof device.

[0033] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the scope of protection of the present invention.

Claims

1. Vacuum pump waterproof device, characterized by: The muffler comprises a front exhaust pipe connected to the vacuum pump and the lower end of the muffler, and a rear exhaust pipe connected to the upper end of the muffler. The front exhaust pipe is a U-shaped pipe. The height of the exhaust port of the rear exhaust pipe is greater than the height of the vacuum pump. The interior of the muffler is sequentially provided with a first chamber, a second chamber, a third chamber, a fourth chamber and a fifth chamber along the gas flow direction, wherein the cross-sectional area of ​​the first chamber gradually increases along the gas flow direction, the cross-sectional area of ​​the second chamber gradually decreases along the gas flow direction, the cross-sectional area of ​​the fourth chamber gradually increases along the gas flow direction, and the cross-sectional area of ​​the fifth chamber gradually decreases along the gas flow direction; The exhaust front pipe includes a first exhaust section, a second exhaust section, and a third exhaust section connected in sequence, the upper end of the first exhaust section is connected to the exhaust port of the vacuum pump, the upper end of the third exhaust section is connected to the lower end of the muffler, and the second exhaust section is connected to the lower ends of the first exhaust section and the third exhaust section; The length direction of the first exhaust section is parallel to the length direction of the third exhaust section. The first exhaust section, the second exhaust section and the third exhaust section are all circular tubes. The axis of the second exhaust section is perpendicular to the axes of the first exhaust section and the third exhaust section. The first exhaust section extends downward toward the exhaust port of the vacuum pump, and the third exhaust section extends upward toward the second exhaust section. The gas discharged from the exhaust port of the vacuum pump flows through the first exhaust section, the second exhaust section and the third exhaust section in sequence, and finally enters the muffler. The exhaust rear pipe is a U-shaped pipe, and includes a fourth exhaust section, a fifth exhaust section, and a sixth exhaust section connected in sequence. The lower end of the fourth exhaust section is connected to the upper end of the muffler, and the fifth exhaust section is connected to the upper ends of the fourth exhaust section and the sixth exhaust section. The fourth exhaust section, the fifth exhaust section and the sixth exhaust section are all circular tubes, the axis of the fifth exhaust section is perpendicular to the axes of the fourth exhaust section and the sixth exhaust section, the fourth exhaust section extends toward the top of the muffler, and the sixth exhaust section extends toward the bottom of the fifth exhaust section, and the gas discharged from the air outlet of the muffler flows through the fourth exhaust section, the fifth exhaust section and the sixth exhaust section in sequence, and is finally discharged into the atmosphere; the fourth exhaust section and the third exhaust section are coaxially arranged, the upper end of the third exhaust section is connected to the air inlet of the muffler, and the lower end of the fourth exhaust section is connected to the air outlet of the muffler, the axis of the fifth exhaust section is parallel to the axis of the second exhaust section, the air outlet of the sixth exhaust section is connected to the atmospheric environment, and the height of the air outlet of the sixth exhaust section is greater than the height of the exhaust port of the vacuum pump; The first chamber and the second chamber are symmetrically arranged, and the fourth chamber and the fifth chamber are symmetrically arranged; The cross-sectional area of ​​the third chamber remains unchanged along the gas flow direction, and the cross-sectional area of ​​the third chamber is the same as the minimum cross-sectional area of ​​the second chamber and the minimum cross-sectional area of ​​the fourth chamber; the minimum cross-sectional area portion of the first chamber is located below the maximum cross-sectional area portion of the first chamber, and the maximum cross-sectional area portion of the second chamber is located below the minimum cross-sectional area portion of the second chamber; the cross-sectional area of ​​the maximum cross-sectional area portion of the first chamber is the same as the cross-sectional area of ​​the maximum cross-sectional area portion of the second chamber, and the cross-sectional area at the minimum cross-sectional area portion of the second chamber is the same as the cross-sectional area of ​​the third chamber; The portion of the fourth chamber with the smallest cross-sectional area is located below the portion of the fourth chamber with the largest cross-sectional area, and the portion of the fifth chamber with the largest cross-sectional area is located below the portion of the fifth chamber with the smallest cross-sectional area. The cross-sectional area of ​​the portion of the fourth chamber with the largest cross-sectional area is the same as the cross-sectional area of ​​the portion of the fifth chamber with the largest cross-sectional area, and the cross-sectional area of ​​the portion of the fourth chamber with the smallest cross-sectional area is the same as the cross-sectional area of ​​the third chamber. The third chamber is located at the center of the muffler. The first, second, third, fourth, and fifth chambers are coaxially arranged. The first, second, third, fourth, and fifth chambers are connected to form an exhaust passage inside the muffler. The air inlet of the muffler is located below the first chamber and communicates with the first chamber, and the air outlet of the muffler is located above the fifth chamber and communicates with the fifth chamber; The length direction of the fourth exhaust section is parallel to the length direction of the sixth exhaust section.

2. The vacuum pump waterproof device according to claim 1, characterized in that: The silencer is cylindrical in shape.

3. The vacuum pump waterproof device according to claim 1, characterized in that: The length of the first exhaust section is smaller than the length of the third exhaust section.

4. The vacuum pump waterproof device according to any one of claims 1 to 3, characterized in that: It also includes a fixing sleeve arranged on the muffler, and the fixing sleeve is made of rubber material.

5. Automobile, characterized in that: The waterproof device for a vacuum pump comprises any one of claims 1 to 4.

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