CN212991131U - Air intake system, engine and equipment - Google Patents

Abstract

The utility model provides a pair of air intake system, engine and equipment, air intake system includes: the device comprises a first air inlet pipe, a second air inlet pipe, a drain pipe and a leakage sensor; the inlet end of the first air inlet pipe is provided with a rain-proof cap, the outlet end of the first air inlet pipe is communicated with the inlet end of the second air inlet pipe, and the outlet end of the second air inlet pipe is used for being connected with an air filter; the drain pipe is arranged along the trend of the first air inlet pipe, the liquid leakage sensor is positioned between the first air inlet pipe and the drain pipe, and the liquid leakage sensor is close to the joint of the first air inlet pipe and the second air inlet pipe. The utility model provides an air intake system, engine and equipment can in time monitor the drainage effect, avoids inside moisture gets into air cleaner and engine to influence engine work efficiency's problem.

Description

Air intake system, engine and equipment

Technical Field

The embodiment of the utility model provides an engine technical field especially relates to an air intake system, engine and equipment.

Background

The fuel cell engine is a power generation device which directly converts hydrogen and oxygen into electric energy through electrochemical reaction, and is mainly applicable to passenger cars, buses, trucks, power generation equipment and the like, wherein an air filter is used as a filter and mainly used for filtering air entering the engine so as to filter impurities, dust and harmful gases in the air, and thus clean air enters an air inlet system of the engine. Air cleaner installs the place ahead at the intake pipe in the engine usually, adopt flange or rubber tube to be connected with the one end of intake pipe, the other end of intake pipe is located the vehicle top and installs rain-proof cap, because rain-proof cap is under long-term strong sunshine, can be gradually photoaging or suffer from the damage of external force, easily produce the crackle and be difficult for perceiving, at this moment sleet can get into the intake pipe through rain-proof cap and along the intake pipe in getting into air cleaner, cause the damage to other parts of air cleaner and engine, consequently, need monitor and in time discharge moisture from the drain pipe getting into the moisture in the intake pipe.

Adopt the rubber tube to connect air cleaner and intake pipe among the existing, when the drain pipe is blockked up or the drainage is not smooth, lead to moisture to enter into inside air cleaner and the engine easily, and then influence engine work efficiency.

SUMMERY OF THE UTILITY MODEL

The utility model provides an air intake system, engine and equipment, the utility model provides an air intake system, through setting up the weeping sensor, like this when the drain pipe is blockked up or the drainage is not smooth, the drainage effect can in time be monitored to the weeping sensor to transmit monitoring signal for engine the control unit, so that engine stop work and start the drainage, avoid inside moisture gets into air cleaner and the engine, thereby influence engine work efficiency's problem.

In a first aspect, the present invention provides an air intake system, including: the device comprises a first air inlet pipe, a second air inlet pipe, a drain pipe and a leakage sensor;

the inlet end of the first air inlet pipe is provided with a rain-proof cap, the outlet end of the first air inlet pipe is communicated with the inlet end of the second air inlet pipe, and the outlet end of the second air inlet pipe is used for being connected with an air filter;

the drain pipe is arranged along the trend of the first air inlet pipe, the liquid leakage sensor is positioned between the first air inlet pipe and the drain pipe, and the liquid leakage sensor is close to the joint of the first air inlet pipe and the second air inlet pipe.

In an optional implementation manner, an included angle between the first air inlet pipe and the second air inlet pipe is an acute angle.

In an optional implementation manner, the first air inlet pipe comprises a first horizontal section and a vertical section, and the second air inlet pipe comprises a second horizontal section and an inclined section;

the inlet end of the first horizontal section is provided with the rain-proof cap, the second horizontal section is used for connecting the air filter, and an included angle between the vertical section and the inclined section is an acute angle;

the liquid leakage sensor is positioned between the vertical section and the drain pipe and is close to the joint of the vertical section and the inclined section.

In an optional implementation manner, the method further includes: and one end of the electric heating element is positioned at the water inlet of the drain pipe, and the other end of the electric heating element is positioned at the water outlet of the drain pipe.

In an alternative implementation, the electric heating elements are arranged at intervals around the periphery of the drain pipe, or the electric heating elements are ring-shaped heating elements.

In an optional implementation manner, the method further includes: and the one-way electromagnetic valve is positioned on the drain pipe and is fixedly connected with the drain pipe.

In an optional implementation, the water supply system further comprises a tail drain pipe, and the tail drain pipe is communicated with the drain pipe.

In an optional implementation manner, an injection pipe is arranged on the tail discharge pipe, and the injection pipe is tightly connected with the tail discharge pipe.

In a second aspect, the present invention provides an engine, comprising at least an air intake system as described in any one of the above, wherein the engine is configured to perform air suction operation through the air intake system.

In a third aspect, the present invention provides an apparatus comprising an engine as defined in any one of the above and an engine control unit;

the engine control unit is electrically connected with the liquid leakage sensor and used for sending out an alarm signal according to the received electric signal sent by the liquid leakage sensor when the liquid leakage sensor monitors moisture, controlling the electric heating element to be in a working state, and stopping the engine and starting water drainage.

The air inlet system provided by the utility model comprises a first air inlet pipe, a second air inlet pipe, a drain pipe and a leakage sensor; the inlet end of the first air inlet pipe is provided with a rain-proof cap, the outlet end of the first air inlet pipe is communicated with the inlet end of the second air inlet pipe, and the outlet end of the second air inlet pipe is used for being connected with an air filter; the drain pipe is arranged along the trend of the first air inlet pipe, the liquid leakage sensor is positioned between the first air inlet pipe and the drain pipe, and the liquid leakage sensor is close to the joint of the first air inlet pipe and the second air inlet pipe.

The existing air intake system comprises an air filter, a first air intake pipe, a second air intake pipe and a drain pipe, wherein a rain-proof cap is arranged at the inlet end of the first air intake pipe, the outlet end of the second air intake pipe is used for connecting the air filter, a liquid leakage sensor is not arranged between the first air intake pipe and the drain pipe, and the rain-proof cap can be gradually aged by light or damaged by external force under long-term strong sunlight, so that cracks are easy to generate and are difficult to detect, thus when the fuel cell operates, an engine is in an air suction state, moisture in air is easy to enter the first air intake pipe from the rain-proof cap and is discharged from the drain pipe, when the drain pipe is blocked or drains poorly, the moisture is collected in the first air intake pipe and flows to the second air intake pipe along the connection part of the first air intake pipe and the second air intake pipe, and then flows into the air filter, thereby damaging components such, thereby affecting the working efficiency of the engine.

The air intake system that this embodiment provided, through still setting up the weeping sensor, when the drain pipe is blockked up or the drainage is not smooth like this, the weeping sensor can in time monitor the drainage effect to transmit monitoring signal for engine the control unit, so that the engine stop work and start the drainage, thereby avoid moisture to get into inside air cleaner and the engine, and influence engine work efficiency's problem.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

FIG. 1 is a schematic diagram of an air intake system provided in the prior art;

fig. 2 is a schematic structural diagram of an air intake system according to an embodiment of the present invention.

Description of reference numerals:

100-an air intake system;

10-a first inlet pipe;

11-an inlet end of a first inlet pipe;

12-rain hat;

13-outlet end of first inlet pipe;

14-a first horizontal segment;

15-vertical section;

20-a second air inlet pipe;

21-inlet end of second inlet pipe;

22-outlet end of second inlet pipe;

23-a second horizontal segment;

24-an inclined section;

30-a drain pipe;

40-a leakage sensor;

50-an electrical heating element;

60-an air filter;

70-one-way solenoid valve;

80-tail calandria;

81-injection pipe.

Detailed Description

The fuel cell engine is a power generation device which directly converts hydrogen and oxygen into electric energy through electrochemical reaction, and is mainly applicable to passenger cars, buses, trucks, power generation equipment and the like, wherein an air filter is used as a filter and mainly used for filtering air entering the engine so as to filter impurities, dust and harmful gases in the air, and thus clean air enters an air inlet system of the engine.

Air cleaner installs the place ahead of intake pipe in the engine usually, adopt flange or rubber tube to be connected with the one end of intake pipe, the other end of intake pipe is located the vehicle top and installs rain-proof cap, because rain-proof cap is under long-term strong sunshine, can light ageing gradually or suffer external damage, easily produce the crackle and be difficult for perceiving, fuel cell is when moving like this, the engine is in the state of breathing in, moisture in the air easily gets into the intake pipe from rain-proof cap, and in getting into air cleaner along the intake pipe, cause the damage to air cleaner and other parts of engine, consequently, need monitor and in time discharge moisture from the drain pipe moisture that gets into in the intake pipe.

In some implementations, the air intake system includes an air cleaner, a first intake pipe, a second intake pipe, and a drain pipe, and when the drain pipe is blocked or drains water smoothly, moisture is easily caused to enter the air cleaner and the inside of the engine, thereby affecting the work efficiency of the engine.

Therefore, in order to solve the above technical problem, the present invention provides an air intake system, which comprises a first air intake pipe, a second air intake pipe, a drain pipe and a leakage sensor; the inlet end of the first air inlet pipe is provided with a rain-proof cap, the outlet end of the first air inlet pipe is communicated with the inlet end of the second air inlet pipe, and the outlet end of the second air inlet pipe is used for being connected with an air filter; the drain pipe is arranged along the trend of the first air inlet pipe, the liquid leakage sensor is positioned between the first air inlet pipe and the drain pipe, and the liquid leakage sensor is close to the joint of the first air inlet pipe and the second air inlet pipe.

The existing air intake system comprises an air filter, a first air intake pipe, a second air intake pipe and a drain pipe, wherein a rain-proof cap is arranged at the inlet end of the first air intake pipe, the outlet end of the second air intake pipe is used for connecting the air filter, a liquid leakage sensor is not arranged between the first air intake pipe and the drain pipe, and the rain-proof cap can be gradually aged by light or damaged by external force under long-term strong sunlight, so that cracks are easy to generate and are difficult to detect, thus when the fuel cell operates, an engine is in an air suction state, moisture in air is easy to enter the first air intake pipe from the rain-proof cap and is discharged from the drain pipe, when the drain pipe is blocked or drains poorly, the moisture is collected in the first air intake pipe and flows to the second air intake pipe along the connection part of the first air intake pipe and the second air intake pipe, and then flows into the air filter, thereby damaging components such, thereby affecting the working efficiency of the engine.

The air intake system that this embodiment provided, through still setting up the weeping sensor, when the drain pipe is blockked up or the drainage is not smooth like this, the weeping sensor can in time monitor the drainage effect to give engine the control unit with monitoring signal transmission, so that the engine stop work and start the drainage, avoid moisture to get into inside air cleaner and the engine, thereby influence engine work efficiency's problem.

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example one

Fig. 2 is a structural schematic diagram of an air intake system provided by an embodiment of the present invention, see fig. 2, this embodiment provides an air intake system 100, this air intake system 100 may include first intake pipe 10, second intake pipe 20, drain pipe 30 and weeping sensor 40, the entry end 11 of first intake pipe 10 is equipped with rain hat 12, the exit end 13 of first intake pipe 10 communicates with the entry end 21 of second intake pipe 20, the exit end 22 of second intake pipe 20 is used for connecting air cleaner 60.

Wherein, for the moisture in the first intake pipe 10 of convenient discharge, the utility model discloses still include drain pipe 30, and drain pipe 30 sets up along the trend of first intake pipe 10, fuel cell is when operation like this, the engine is in the state of breathing in, moisture in the air easily enters into in the first intake pipe 10 from rain-proof cap 12, and discharge from drain pipe 30 along the arrow direction in fig. 2, however when drain pipe 30 is blockked up or the drainage is not smooth, moisture gathers and gathers in first intake pipe 10, and flow into second intake pipe 20 along the junction of first intake pipe 10 and second intake pipe 20, and then flow in air cleaner 60, thereby to air cleaner 60, parts such as engine cause the damage, and then influence engine work efficiency.

Therefore, in order to monitor the drainage effect in time and prevent moisture from entering the air cleaner 60, the present embodiment further includes a leakage sensor 40, wherein, as shown in fig. 2, the leakage sensor 40 may be located between the first air inlet pipe 10 and the drain pipe 30, and the leakage sensor 40 is close to the connection between the first air inlet pipe 10 and the second air inlet pipe 20.

By arranging the liquid leakage sensor 40, when the drain pipe 30 is blocked or the drainage is not smooth, the liquid leakage sensor 40 can monitor the drainage effect in time and transmit a monitoring signal to the engine control unit, so that the engine stops working and starts drainage, and the problem that the water enters the air filter 60 and the inside of the engine and affects the working efficiency of the engine is solved.

It should be noted that, in the present embodiment, the distance from the liquid leakage sensor 40 to the first intake pipe 10 is not further limited, as long as the liquid leakage sensor 40 can monitor the drainage effect and prevent moisture from entering the air cleaner 60 and the inside of the engine, which are within the protection scope of the present application.

In addition, the sizes of the first intake pipe 10, the second intake pipe 20, and the drain pipe 30 are not further limited in the present embodiment, because the sizes of the first intake pipe 10, the second intake pipe 20, and the drain pipe 30 may be specifically set according to different models of engines or vehicles.

Therefore, the air intake system 100 provided by the present embodiment includes a first air intake pipe 10, a second air intake pipe 20, a drain pipe 30, and a leakage sensor 40; the inlet end 11 of the first air inlet pipe 10 is provided with a rain hat 12, the outlet end 13 of the first air inlet pipe 10 is communicated with the inlet end 21 of the second air inlet pipe 20, and the outlet end 22 of the second air inlet pipe 20 is used for being connected with an air filter 60; the drain pipe 30 is arranged along the direction of the first air inlet pipe 10, the leakage sensor 40 is positioned between the first air inlet pipe 10 and the drain pipe 30, and the leakage sensor 40 is close to the joint of the first air inlet pipe 10 and the second air inlet pipe 20.

Compared with the conventional air intake system 100, as shown in fig. 1, the conventional air intake system 100 includes an air cleaner 60, a first air intake pipe 10, a second air intake pipe 20 and a drain pipe 30, an inlet end 11 of the first air intake pipe 10 is provided with a rain hat 12, an outlet end 22 of the second air intake pipe 20 is used for connecting the air cleaner 60, a liquid leakage sensor 40 is not arranged between the first air intake pipe 10 and the drain pipe 30, and the rain hat 12 is gradually subjected to light aging or external force damage due to long-term strong sunlight, and is easy to crack and is not easy to be perceived, so that when the fuel cell is operated, the engine is in an air suction state, moisture in air is easy to enter the first air intake pipe 10 from the rain hat 12 and is discharged from the drain pipe 30, and when the drain pipe 30 is blocked or has poor drainage, the moisture is collected in the first air intake pipe 10 and flows to the second air intake pipe 20 along a connection part of the first air intake pipe 10 and the, and then flows into the air cleaner 60, thereby damaging the air cleaner 60, the engine, and other components, and further affecting the operating efficiency of the engine.

In the air intake system 100 provided in this embodiment, by further providing the liquid leakage sensor 40, when the drain pipe 30 is blocked or the drainage is not smooth, the liquid leakage sensor 40 can monitor the drainage effect in time, and transmit the monitoring signal to the engine control unit, so that the engine stops working and starts drainage, thereby preventing the moisture from entering the air cleaner 60 and the inside of the engine and affecting the working efficiency of the engine.

In a possible implementation, as shown in fig. 2, the included angle between the first air inlet pipe 10 and the second air inlet pipe 20 is an acute angle.

In this embodiment, an included angle between the first air inlet pipe 10 and the second air inlet pipe 20 may be α, where α is smaller than 90 °, for example, the included angle α between the first air inlet pipe 10 and the second air inlet pipe 20 may be 30 °, 45 °, 60 °, or the like, or the included angle between the first air inlet pipe 10 and the second air inlet pipe 20 may also be set according to actual needs.

Compared with the existing air intake system 100, as shown in fig. 1, an included angle β between the first air intake pipe 10 and the second air intake pipe 20 in the existing air intake system 100 is an obtuse angle, so when the drain pipe 30 is blocked or drainage is not smooth, as shown in fig. 1, moisture may be gathered in the first air intake pipe 10 and flow to the second air intake pipe 20 along a connection part of the first air intake pipe 10 and the second air intake pipe 20, and meanwhile, because the included angle β between the first air intake pipe 10 and the second air intake pipe 20 is an obtuse angle, moisture may be accelerated to flow from the first air intake pipe 10 to the second air intake pipe 20, so as to damage components such as the air cleaner 60 and the engine, and further affect the working efficiency of the engine.

Therefore, in this embodiment, by setting the included angle α between the first intake pipe 10 and the second intake pipe 20 to be an acute angle, when the drain pipe 30 is blocked or drainage is not smooth, on one hand, the water flow speed is reduced to prevent the water from flowing into the second intake pipe 20 and the air cleaner 60 too fast, on the other hand, sufficient time is provided for monitoring the leakage sensor 40 and sending a monitoring signal, so that the leakage sensor 40 can monitor the drainage effect in time, and the monitoring signal is transmitted to the engine control unit to stop the engine and start drainage, thereby preventing moisture from entering the air cleaner 60 and the inside of the engine and affecting the working efficiency of the engine.

In a possible implementation manner, as shown in fig. 2, the first air inlet pipe 10 may include a first horizontal section 14 and a vertical section 15, and the second air inlet pipe 20 may include a second horizontal section 23 and an inclined section 24, wherein the inlet end of the first horizontal section 14 is provided with a rain-proof cap 12, the second horizontal section 23 is used for connecting an air cleaner 60, and an included angle between the vertical section 15 and the inclined section 24 is an acute angle; the leakage sensor 40 is located between the vertical section 15 and the drain pipe 30, near the junction of the vertical section 15 and the inclined section 24.

It should be noted that, in the present embodiment, the sizes of the first horizontal section 14, the vertical section 15, the second horizontal section 23 and the inclined section 24 are not further limited in the present embodiment, because the sizes of the first air inlet pipe 10, the second air inlet pipe 20 and the water outlet pipe 30 can be specifically set according to different types of engines or vehicles, as long as it is ensured that moisture is prevented from entering the air cleaner 60 and the interior of the engine is within the protection scope of the present application.

In a possible implementation manner, as shown in fig. 2, the method may further include: and one end of the electric heating element 50 is positioned at the water inlet of the drain pipe 30, and the other end of the electric heating element 50 is positioned at the water outlet of the drain pipe 30.

In this embodiment, by providing the electric heating element 50, the problem that the water is easily frozen to cause unsmooth drainage of the drainage pipe 30 when the electric heating element is in a low-temperature environment state can be solved, which is beneficial to improving the low-temperature adaptability of the product.

In one possible implementation, the electric heating element 50 may be a plurality of electric heating elements 50, wherein the plurality of electric heating elements 50 may be arranged at intervals on the outer side wall of the drain pipe 30, and the plurality of electric heating elements 50 are arranged circumferentially along the outer side wall of the drain pipe 30.

Alternatively, the electric heating element 50 may also be a ring-shaped heating element disposed along the circumference of the outer side wall of the drain pipe 30, and in the embodiment, the specific structure of the electric heating element 50 is not further limited as long as the drainage effect of the drain pipe 30 can be improved, which falls within the protection scope of the present application.

In addition, in the present embodiment, the length and the thickness of the electric heating element 50 are also not further limited, because the length and the thickness of the electric heating element 50 can be specifically set according to different types of engines or vehicles.

In a possible implementation manner, as shown in fig. 2, the method may further include: and the one-way solenoid valve 70 is positioned on the drain pipe 30, and the one-way solenoid valve 70 is tightly connected with the drain pipe 30.

In this embodiment, the one-way solenoid valve 70 prevents the bad air generated in the tail exhaust from being sucked into the air cleaner 60, thereby further improving the engine operating efficiency.

In the present embodiment, the specific opening position of the one-way solenoid valve 70 on the drain pipe 30 is not further limited, and the present invention is within the protection scope as long as the suction of the bad air generated in the tail gas into the air cleaner 60 can be avoided.

In one possible implementation, as shown in fig. 2, a tail pipe 80 may be further included, the tail pipe 80 being in communication with the drain pipe 30.

In this embodiment, through setting up tail calandria 80, the moisture of drain pipe 30 exhaust collects tail calandria 80 in, is favorable to unified processing or collection, simultaneously, sets up tail calandria 80 and can also strengthen the drainage dust exhaust effect of drain pipe 30.

In a possible implementation manner, as shown in fig. 2, an injection pipe 81 may be further disposed on the tail discharge pipe 80, and the injection pipe 81 is connected to the tail discharge pipe 80 in a fastening manner.

Example two

The second embodiment provides an engine including an intake system 100, and the engine can perform an intake operation through the intake system 100.

The structure of the air intake system 100 in this embodiment is the same as that of the air intake system 100 in the first embodiment, and the same or similar technical effects can be brought about, and details are not repeated herein, and specific reference can be made to the description of the above embodiments.

EXAMPLE III

The third embodiment further provides equipment comprising an engine and an engine control unit.

The engine control unit is electrically connected with the liquid leakage sensor 40 and is used for sending out an alarm signal according to the received electric signal sent by the liquid leakage sensor 40 when the liquid leakage sensor 40 monitors moisture, controlling the electric heating element 50 to be in a working state, stopping the engine and starting water drainage, and therefore the problem that the moisture enters the air filter 60 and the inside of the engine and influences the working efficiency of the engine is solved.

In the description of the present invention, it is to be understood that the terms "top," "bottom," "upper," "lower" (if present), and the like, are used in the orientation or positional relationship shown in the drawings for convenience in describing the present invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The terms "first" and "second" in the description and claims of the present application and the description of the above-described figures are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (10)

1. An air intake system, comprising: the device comprises a first air inlet pipe, a second air inlet pipe, a drain pipe and a leakage sensor;

the inlet end of the first air inlet pipe is provided with a rain-proof cap, the outlet end of the first air inlet pipe is communicated with the inlet end of the second air inlet pipe, and the outlet end of the second air inlet pipe is used for being connected with an air filter;

the drain pipe is arranged along the trend of the first air inlet pipe, the liquid leakage sensor is positioned between the first air inlet pipe and the drain pipe, and the liquid leakage sensor is close to the joint of the first air inlet pipe and the second air inlet pipe.

2. The air intake system of claim 1, wherein an included angle between the first air intake pipe and the second air intake pipe is an acute angle.

3. The air intake system of claim 2, wherein the first intake pipe includes a first horizontal section and a vertical section, and the second intake pipe includes a second horizontal section and an inclined section;

the inlet end of the first horizontal section is provided with the rain-proof cap, the second horizontal section is used for connecting the air filter, and an included angle between the vertical section and the inclined section is an acute angle;

the liquid leakage sensor is positioned between the vertical section and the drain pipe and is close to the joint of the vertical section and the inclined section.

4. The intake system of any one of claims 1-3, further comprising: and one end of the electric heating element is positioned at the water inlet of the drain pipe, and the other end of the electric heating element is positioned at the water outlet of the drain pipe.

5. The air intake system of claim 4, wherein the electrical heating elements are spaced around the periphery of the drain pipe, or wherein the electrical heating elements are annular heating elements.

6. The intake system of any one of claims 1-3, further comprising: and the one-way electromagnetic valve is positioned on the drain pipe and is fixedly connected with the drain pipe.

7. The air intake system of any one of claims 1-3, further comprising a tail pipe, the tail pipe in communication with the drain pipe.

8. The air intake system of claim 7, wherein the tail pipe is provided with an ejector pipe, and the ejector pipe is tightly connected with the tail pipe.

9. An engine comprising an air intake system as claimed in any one of claims 1 to 8, the engine operating by air intake through the air intake system.

10. An apparatus, characterized by comprising the engine of claim 9 and an engine control unit;

the engine control unit is electrically connected with the liquid leakage sensor and used for sending out an alarm signal according to the received electric signal sent by the liquid leakage sensor when the liquid leakage sensor monitors moisture, controlling the electric heating element to be in a working state, and stopping the engine and starting water drainage.

Images