CN214577713U

CN214577713U - Electronic vacuum pump with suck-back prevention function and automobile

Info

Publication number: CN214577713U
Application number: CN202120353092.7U
Authority: CN
Inventors: 王夫健
Original assignee: Chongqing Changan Automobile Co Ltd
Current assignee: Chongqing Changan Automobile Co Ltd
Priority date: 2021-02-08
Filing date: 2021-02-08
Publication date: 2021-11-02
Anticipated expiration: 2031-02-08

Abstract

The utility model provides an electron vacuum pump and car with prevent suck-back function under the prerequisite of guaranteeing that the electron vacuum pump is normally carminative, can also prevent water and impurity suck-back to motor casing in the suck-back route that blocks the blast pipe behind the electron vacuum pump stop work. This electron vacuum pump with prevent suck-back function includes: an electronic vacuum pump body; the exhaust pipe is connected with the electronic vacuum pump body, and an exhaust small hole communicated with an internal channel of the exhaust pipe is formed in the outer wall of the exhaust pipe; the anti-suck-back thin film is sleeved on the exhaust pipe; when the electronic vacuum pump body works, gas in the exhaust pipe is discharged through the small exhaust holes and a gap formed between the suck-back prevention film and the exhaust pipe in sequence; when the electronic vacuum pump body stops working, the anti-suck-back film seals the small exhaust holes in the exhaust pipe.

Description

Electronic vacuum pump with suck-back prevention function and automobile

Technical Field

The utility model relates to an automobile parts makes technical field, concretely relates to electronic vacuum pump and car with prevent suck-back function.

Background

At present, due to the fact that the electronic vacuum pump assembly is limited by the arrangement of an engine compartment of a vehicle, the electronic vacuum pump assembly is mostly arranged on a vehicle body cross beam, the exhaust port of the electronic vacuum pump assembly is relatively close to a vehicle wading line due to the position, the exhaust port is prone to being submerged due to water surface surging when the vehicle wades, if the electronic vacuum pump stops working at the moment, the electronic vacuum pump is corroded and loses efficacy due to the fact that certain negative pressure exists in the electronic vacuum pump assembly, and water is sucked back into a motor shell through an exhaust pipe. Except the working condition of wading, dust and impurities in the air can be accumulated in the motor shell through the phenomenon of back suction in normal use, and the service life of the motor is influenced.

SUMMERY OF THE UTILITY MODEL

In order to overcome the problem, the utility model provides an electron vacuum pump and car with prevent suck-back function under the prerequisite of guaranteeing that electron vacuum pump normally exhausts, can also prevent water and impurity suck-back to motor casing in the suck-back route that blocks the blast pipe behind the electron vacuum pump stop work.

The utility model adopts the technical proposal that:

the embodiment of the utility model provides an electronic vacuum pump with prevent suck-back function, include:

an electronic vacuum pump body;

the exhaust pipe is connected with the electronic vacuum pump body, and an exhaust small hole communicated with an internal channel of the exhaust pipe is formed in the outer wall of the exhaust pipe;

the anti-suck-back thin film is sleeved on the exhaust pipe;

when the electronic vacuum pump body works, gas in the exhaust pipe is discharged through the small exhaust holes and a gap formed between the suck-back prevention film and the exhaust pipe in sequence; when the electronic vacuum pump body stops working, the anti-suck-back film seals the small exhaust holes in the exhaust pipe.

The exhaust tail end of the exhaust pipe is sealed, and the suck-back prevention film is arranged in a cylindrical shape.

And a limiting bulge for limiting the suck-back prevention film is formed outside the exhaust pipe.

Wherein, the electron vacuum pump still includes:

the dust cover is connected with the electronic vacuum pump body; the exhaust pipe and the anti-suck-back film are arranged between the electronic vacuum pump body and the dust cover, and the exhaust pipe and the anti-suck-back film are shielded by the dust cover.

The embodiment of the utility model provides a still provide an automobile, including foretell electronic vacuum pump that has the function of preventing suck-back.

The utility model has the advantages that:

and blocking a suck-back path after the electronic vacuum pump body stops working to prevent water and impurities from being sucked back to the motor shell. When the electronic vacuum pump body works, airflow enters from the air inlet pipe and is exhausted from the exhaust pipe after flowing through the electronic vacuum pump body. When exhausting, the air pressure makes the anti-suck-back film at the small exhaust hole deform, and the air is exhausted from the gap between the anti-suck-back film and the exhaust pipe, so that the normal function of the electronic vacuum pump body is not influenced. When the electronic vacuum pump body stops working, a certain negative pressure exists in the electronic vacuum pump body, and the suck-back prevention film deforms to tightly seal the small exhaust holes during suck-back so as to block a suck-back path.

The utility model discloses can effectively solve the electronic vacuum pump resorption problem.

Drawings

Fig. 1 is a schematic view of an operation principle of an electronic vacuum pump in an embodiment of the present invention.

Fig. 2 is the explosion diagram of the working principle of the anti-suck-back structure of the exhaust port of the utility model.

Fig. 3 is a cross-sectional view of the working principle of the anti-suck-back structure of the exhaust port of the present invention.

In the figure, 5-inlet pipe; 1-an electronic vacuum pump body; 2-an exhaust pipe; 3-anti-suck back film; 4-a dust cover;

21-exhaust aperture; 22-limit bump.

Detailed Description

Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

Referring to fig. 1, the embodiment of the present invention provides an electronic vacuum pump with suck-back prevention function, which includes: the vacuum pump comprises a vacuum pump body 1, an air inlet pipe 5 and an exhaust pipe 2 which are communicated with the vacuum pump body 1, and a suck-back prevention film 3 which is sleeved on the exhaust pipe 2.

Wherein, the outer wall of the exhaust pipe 2 is provided with small exhaust holes 21 communicated to the inner channel thereof, and the tail part of the exhaust pipe 2 is closed, so that the gas in the inner channel of the exhaust pipe 2 can only be exhausted through the small exhaust holes 21.

The anti-suck-back film 3 is arranged in a cylindrical shape, the anti-suck-back film 3 has certain deformability, and a gap can be formed between the anti-suck-back film and the outer wall of the exhaust pipe 2 under the blowing of the airflow in the exhaust pipe 2, so that the gas in the exhaust pipe 2 can be discharged; and when the air is sucked back, the small exhaust hole of the exhaust pipe 2 is sealed, so that external air, impurities and the like are prevented from being sucked into the motor shell.

As shown in fig. 3, a circle of limiting protrusions 22 for installing and limiting the anti-suck back film 3 is disposed on the outer wall of the exhaust pipe 2 to prevent the anti-suck back film 3 from falling off.

As shown in fig. 2 and 3, when the electronic vacuum pump body 1 is in operation, an air flow enters from the air inlet pipe 5, passes through the electronic vacuum pump body 1, and is exhausted from the air outlet pipe 2. When exhausting, the air pressure makes the anti-suck-back film 3 at the small exhaust hole 21 deform, and the air is exhausted from the gap between the anti-suck-back film 3 and the exhaust pipe 2, so that the normal function of the electronic vacuum pump body 1 is not influenced. When the electronic vacuum pump body 1 stops working, a certain negative pressure exists in the electronic vacuum pump body 1, and when the suck-back phenomenon occurs under the action of the negative pressure, the suck-back prevention film 3 deforms and tightly seals the small vent hole 21, so that a suck-back path is blocked.

The foregoing embodiments have described only some of the one or more embodiments of the present invention, but it will be appreciated by those skilled in the art that the invention can be embodied in many other forms without departing from the spirit or scope of the invention. Accordingly, the present examples and embodiments are to be considered as illustrative and not restrictive, and various modifications and substitutions may be made thereto without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. An electronic vacuum pump with suck-back prevention function, characterized by comprising:

an electronic vacuum pump body (1);

the exhaust pipe (2) is connected with the electronic vacuum pump body (1), and an exhaust small hole (21) communicated with an internal channel of the exhaust pipe (2) is formed in the outer wall of the exhaust pipe (2);

the anti-suck-back film (3) is sleeved on the exhaust pipe (2);

when the electronic vacuum pump body (1) works, gas in the exhaust pipe (2) is discharged through the small exhaust holes (21) and a gap formed between the suck-back prevention film (3) and the exhaust pipe (2) in sequence; when the electronic vacuum pump body (1) stops working, the suck-back prevention film (3) seals the small exhaust holes (21) on the exhaust pipe (2).

2. The electronic vacuum pump according to claim 1, wherein the exhaust end of the exhaust pipe (2) is closed, and the suck back prevention film (3) is cylindrical.

3. The electronic vacuum pump according to claim 1, wherein a limiting protrusion (22) for limiting the suck back prevention film (3) is formed outside the exhaust pipe.

4. An electronic vacuum pump according to claim 1, further comprising:

a dust cover (4) connected with the electronic vacuum pump body (1); the exhaust pipe (2) and the anti-suck-back film (3) are arranged between the electronic vacuum pump body (1) and the dust cover (4), and the exhaust pipe (2) and the anti-suck-back film (3) are shielded by the dust cover (4).

5. An automobile, characterized by comprising the electronic vacuum pump with suck-back prevention function of any one of claims 1 to 4.