Small electronic valve

Abstract

The utility model provides a small electronic valve which comprises a valve body, the valve body is provided with a through flow channel, and the flow channel is provided with at least two openings formed in the side wall of the valve body. The valve further comprises an execution part, a driving part and a PCBA, and the execution part is arranged in the valve body. The driving piece is arranged in the valve body and used for driving the executing piece to move so as to control opening and closing of the flow channel. The PCBA is arranged in the valve body, the PCBA is electrically connected with the driving piece, and the PCBA is controlled through a voltage signal of the PWM control module driving piece. The PCBA is arranged in the valve body and used for controlling the voltage signal of the driving part, so that the driving part does not need to be kept in a high-power power supply state for a long time, the problem of heating of the driving part can be avoided, and the service life is prolonged; the electronic valve integrates the functions of a conventional FLVV valve, an ROV valve and an FTIV valve, the structure is beneficial to miniaturization of the electronic valve, the installation and application requirements of a thin oil tank are met, and meanwhile the application safety can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a small electronic valve. Background Art

[0002] With the development of new energy hybrid vehicles, their fuel tanks are also becoming lighter and thinner. However, due to their lower height, thin fuel tanks are more prone to breathing hole blockage. For this reason, it is necessary to set up multiple valves, or set up valves that can be opened and closed according to the fuel tank parameters, to achieve the discharge of fuel vapor and the replenishment of air inside the fuel tank.

[0003] The invention patent with the existing authorization announcement number CN109398075B discloses a method and device for controlling a fuel tank vent valve. The method includes: obtaining a road condition grade, determining the degree of fuel tank shaking, obtaining a fuel tank vent valve closing duration grade, and grading the fuel volume in the fuel tank to obtain a fuel volume coefficient, and grading the vehicle acceleration to obtain a vehicle acceleration coefficient; according to the road condition grade, fuel tank vent valve closing duration grade, fuel volume coefficient and vehicle acceleration coefficient, combined with a weighted coefficient, obtaining the final closing duration of the fuel tank vent valve, and controlling the closing of the fuel tank vent valve according to the final closing duration.

[0004] As mentioned above, only the control logic of the valve is revealed. In the current solenoid valve control, the relevant control instructions of the solenoid valve are controlled by the vehicle controller. At this time, the electromagnet of the solenoid valve is only equivalent to an actuator, which operates by the voltage signal output by the vehicle controller. In this structure, although the volume of the electromagnet can be reduced, the performance of the electromagnet depends on the inherent parameters of the electromagnet itself. Excessive reduction of the volume of the electromagnet will affect its durability. At the same time, long-term voltage signals will cause the electromagnet drive to heat up and fail, so it is urgently needed to be improved. Utility Model Content

[0005] In view of this, the utility model proposes a small electronic valve which is small in size and can avoid heating of components, thereby solving the problem that the existing solenoid valve is prone to heating and failure due to long-term power-on.

[0006] The technical solution of the utility model is implemented as follows: the utility model provides a small electronic valve, including a valve body, the valve body is provided with a through flow channel, and the flow channel has at least two openings provided on the side wall of the valve body;

[0007] It also includes actuators, drive components and PCBA, among which:

[0008] The actuator is arranged in the valve body;

[0009] The driving member is arranged in the valve body, and is used to drive the actuator to move so as to control the opening and closing of the flow channel;

[0010] The PCBA is arranged in the valve body and is electrically connected to the driving component. The PCBA controls the voltage signal of the driving component by means of a PWM control module.

[0011] On the basis of the above technical solution, preferably, it further comprises a partition plate, which is arranged in the valve body to separate the internal space of the valve body into a first cavity and a second cavity, wherein:

[0012] The driving member and the PCBA are arranged in the first cavity;

[0013] The opening is formed on the side wall of the valve body corresponding to the second cavity, and the opening and the second cavity form a flow channel;

[0014] The actuator is connected to the driving member, and the actuator passes through the partition and extends into the second cavity.

[0015] On the basis of the above technical solution, preferably, one end of the valve body away from the second cavity is an openable structure.

[0016] On the basis of the above technical solution, preferably, the driving member and the PCBA are connected to the inner wall or partition of the first cavity.

[0017] On the basis of the above technical solution, preferably, the actuator is the guide rod of the electromagnet coil assembly, and the driving member is the electromagnet coil assembly.

[0018] On the basis of the above technical solution, preferably, it further comprises a bottom shell, which is detachably connected to one end of the valve body to block the end of the second cavity away from the first cavity;

[0019] The bottom shell is provided with at least one opening.

[0020] On the basis of the above technical solution, preferably, it further includes a base, a negative pressure spring and a valve plate, wherein:

[0021] The base is arranged on an end of the bottom shell away from the valve body, and a third cavity is formed between the base and the bottom shell. The base is provided with at least one opening, and the opening of the base is arranged opposite to the opening of the bottom shell.

[0022] The bottom shell is provided with a through hole corresponding to the third cavity;

[0023] The negative pressure spring is arranged in the third cavity, and the negative pressure spring is connected to the base;

[0024] The valve plate is arranged on one end of the negative pressure spring close to the bottom shell, and the valve plate abuts against the bottom shell and blocks the through hole.

[0025] On the basis of the above technical solution, preferably, the guide rod of the electromagnet coil assembly includes a rod body, a sealing plug and a positive pressure spring, wherein:

[0026] One end of the rod body is connected to the electromagnet coil assembly, and the rod body passes through the partition and extends into the second cavity;

[0027] The sealing plug is arranged on one end of the rod body located in the second cavity;

[0028] The positive pressure spring is sleeved on the rod body, the positive pressure spring is located in the second cavity, and one end of the positive pressure spring abuts against the partition plate, and the other end abuts against the rod body.

[0029] On the basis of the above technical solution, preferably, the guide rod of the electromagnet coil assembly further includes a first baffle and a second baffle, and the sealing plug includes a connecting portion and a sealing portion, wherein:

[0030] The first baffle is arranged on one end of the rod body away from the electromagnet coil assembly, and the diameter of the first baffle is smaller than the aperture of the opening;

[0031] The second baffle is arranged on the rod body, and the second baffle is closer to the electromagnet coil assembly than the first baffle;

[0032] The connecting portion of the sealing plug is assembled between the first baffle plate and the second baffle plate, and the diameter of the connecting portion is greater than the diameter of the first baffle plate;

[0033] The sealing part is arranged at the periphery of the connecting part, the sealing part is in a U-shaped opening shape, and the diameters of the sealing part and the second baffle are larger than the aperture of the opening.

[0034] Compared with the prior art, the small electronic valve of the utility model has the following beneficial effects:

[0035] (1) By setting a PCBA in the valve body to control the voltage signal of the driver, the driver does not need to be kept in a high-power supply state for a long time, which can avoid the problem of heating of the driver and extend the service life. This structure is conducive to the miniaturization of the electronic valve and can also improve the safety of application;

[0036] (2) A first cavity and a second cavity are provided in the valve body of the electronic valve, wherein the first cavity is used to seal the driving component and the PCBA, which can prevent the fuel vapor from damaging the driving component and the PCBA, thereby ensuring the service life of the electronic valve;

[0037] (3) The actuator of the electronic valve includes a first baffle and a second baffle, a sealing plug is arranged between the first baffle and the second baffle, and the sealing portion of the sealing plug is in a U-shaped opening, so that when the sealing plug seals the flow channel, it is beneficial to improve the sealing effect and ensure the sealing of the flow channel;

[0038] (4) The actuator and driving part in the electronic valve cooperate with the partition to form a positive pressure valve, while the negative pressure spring and valve plate cooperate with the bottom shell to form a negative pressure valve. In this way, the electronic valve integrates the functions of the conventional FLVV valve, ROV valve and FTIV valve. It has a compact structure, is easy to assemble and does not take up space, which is very suitable for the use of thin fuel tanks in vehicles. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0040] Figure 1 This is a front view of the small electronic valve of the utility model;

[0041] Figure 2 For the utility model Figure 1 Middle AA section view;

[0042] Figure 3 This is an exploded view of the small electronic valve of the utility model;

[0043] Figure 4 It is a cross-sectional perspective view of the small electronic valve of the utility model;

[0044] In the figure: 1. valve body; 101. flow channel; 1011. opening; 102. first cavity; 103. second cavity; 104. third cavity; 2. actuator; 21. rod body; 22. sealing plug; 221. connecting part; 222. sealing part; 23. positive pressure spring; 24. first baffle; 25. second baffle; 3. driving member; 4. PCBA; 5. partition; 6. bottom shell; 601. through hole; 7. base; 8. negative pressure spring; 9. valve plate. DETAILED DESCRIPTION

[0045] The following will be combined with the implementation of the utility model to clearly and completely describe the technical solutions in the implementation of the utility model. Obviously, the described implementation is only a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0046] like Figures 1 to 4As shown, the small electronic valve of the utility model comprises a valve body 1, an actuator 2, a driving member 3, a PCBA 4, a partition 5, a bottom shell 6, a base 7, a negative pressure spring 8 and a valve plate 9. The electronic valve is installed on the oil pump for use, and is connected to the oil tank and the carbon canister.

[0047] like Figure 1 , Figure 2 and Figure 3 As shown, the valve body 1 is provided with a through flow channel 101, and the flow channel 101 has at least two openings 1011 opened on the side wall of the valve body 1;

[0048] As in the above structure, the two openings 1011 are used for input and output of the medium respectively.

[0049] The actuator 2 is disposed in the valve body 1; the driving member 3 is disposed in the valve body 1, and the driving member 3 is used to drive the actuator 2 to move so as to control the opening and closing of the flow channel 101;

[0050] As in the above structure, the driving member 3 is used to drive the actuator 2 to move so that the actuator 2 can selectively close the flow channel 101 .

[0051] Specifically, the actuator 2 is the guide rod of the electromagnet coil assembly, and the driving member 3 is the electromagnet coil assembly. In this structure, the displacement of the guide rod of the electromagnet coil assembly can be controlled by the power on and off of the electromagnet coil assembly.

[0052] PCBA4 is disposed in the valve body 1 and is electrically connected to the driving component 3. PCBA4 controls the voltage signal of the driving component 3 by means of a PWM control module;

[0053] As shown in the above structure, PCBA4 is used to control the voltage signal from the vehicle controller. When the electromagnet coil assembly needs to move, PCBA4 controls the electromagnet coil assembly to drive the electromagnet coil assembly guide rod to move. Since the electromagnet coil assembly adopts independent control, there is no need to maintain the power supply of the electromagnet coil assembly for a long time, which can avoid the problem of heating failure of the electromagnet coil assembly, so as to improve the application safety, and it also has the advantage of small size.

[0054] like Figure 2 As shown, the partition 5 is arranged in the valve body 1 to separate the internal space of the valve body 1 into a first cavity 102 and a second cavity 103, wherein the driving member 3 and the PCBA 4 are arranged in the first cavity 102; an opening 1011 is opened on the side wall of the valve body 1 corresponding to the second cavity 103, and the opening 1011 and the second cavity 103 form a flow channel 101; the actuator 2 is connected to the driving member 3, and the actuator 2 passes through the partition 5 and extends into the second cavity 103;

[0055] In some embodiments, the end of the valve body 1 away from the second cavity 103 is an openable structure. In this way, it is convenient to maintain the driving member 3 and PCBA 4 in the first cavity 102 to ensure the convenience of application. Specifically, a threaded end cap can be provided to seal the end of the first cavity 102.

[0056] like Figure 2 As shown, the driving member 3 and the PCBA 4 are connected to the inner wall or the partition 5 of the first cavity 102;

[0057] As in the above structure, when the assembly is fixed, the driving member 3 and the PCBA 4 can be connected to the inner wall of the valve body 1, or to the partition 5, which can be a fixed connection or a detachable connection.

[0058] like Figure 2 As shown, the bottom shell 6 is detachably connected to one end of the valve body 1 to block the end of the second cavity 103 away from the first cavity 102; at least one opening 1011 is formed on the bottom shell 6;

[0059] As in the above structure, the bottom shell 6 is used to block the end of the valve body 1, and the bottom shell 6 and the valve body 1 are detachably connected, so that the internal components of the valve body 1 can be maintained after the bottom shell 6 is removed, which has the advantage of convenient maintenance.

[0060] like Figure 2 As shown, the base 7 is arranged on one end of the bottom shell 6 away from the valve body 1, and a third cavity 104 is formed between the base 7 and the bottom shell 6, the base 7 is provided with at least one opening 1011, and the opening 1011 of the base 7 is arranged opposite to the opening 1011 of the bottom shell 6; the bottom shell 6 is provided with a through hole 601 corresponding to the third cavity 104; the negative pressure spring 8 is arranged in the third cavity 104, and the negative pressure spring 8 is connected to the base 7; the valve plate 9 is arranged on one end of the negative pressure spring 8 close to the bottom shell 6, and the valve plate 9 abuts against the bottom shell 6 and blocks the through hole 601;

[0061] As described above, by providing the third cavity 104, the base 7, the negative pressure spring 8 and the valve plate 9, the electronic valve can realize breathing-type ventilation. When working, the fuel tank discharges fuel vapor, and the airflow can be supplied through the opening 1011 of the base 7, pushing the actuator 2 to move, and the airflow enters the second cavity 103, and then outputs through the opening 1011 on the valve body 1. When reverse air supply is performed, the gas is input into the second cavity 103 through the opening 1011 on the valve body 1, and then pushes the valve plate 9 through the through hole 601. At this time, the negative pressure spring 8 is compressed, and the gas passes through the through hole 601 and then outputs through the opening 1011 opened on the base 7.

[0062] When the pressure is too high, the driving member 3 can also control the actuator 2 to actively move and release air.

[0063] like Figure 2As shown, the guide rod of the electromagnet coil assembly includes a rod body 21, a sealing plug 22 and a positive pressure spring 23, wherein one end of the rod body 21 is connected to the electromagnet coil assembly, and the rod body 21 passes through the partition 5 and extends into the second cavity 103; the sealing plug 22 is arranged on one end of the rod body 21 located in the second cavity 103; the positive pressure spring 23 is sleeved on the rod body 21, the positive pressure spring 23 is located in the second cavity 103, and one end of the positive pressure spring 23 abuts against the partition 5, and the other end abuts against the rod body 21;

[0064] As in the above structure, when the gas circulates, the gas pushes the rod body 21 to move to compress the positive pressure spring 23. At this time, the sealing plug 22 releases the seal on the opening 1011 of the bottom shell 6, thereby realizing the circulation of the gas. When the pressure is too high, PCBA4 controls the electromagnet coil assembly to be energized, controls the rod body 21 and the sealing plug 22 to actively move, and realizes exhaust.

[0065] like Figure 2 and Figure 3 As shown, the guide rod of the electromagnet coil assembly further includes a first baffle 24 and a second baffle 25, and the sealing plug 22 includes a connecting portion 221 and a sealing portion 222, wherein the first baffle 24 is arranged on an end of the rod body 21 away from the electromagnet coil assembly, and the diameter of the first baffle 24 is smaller than the aperture of the opening 1011; the second baffle 25 is arranged on the rod body 21, and the second baffle 25 is closer to the electromagnet coil assembly relative to the first baffle 24; the connecting portion 221 of the sealing plug 22 is assembled between the first baffle 24 and the second baffle 25, and the diameter of the connecting portion 221 is larger than the diameter of the first baffle 24; the sealing portion 222 is arranged on the periphery of the connecting portion 221, the sealing portion 222 is in a U-shaped opening shape, and the diameters of the sealing portion 222 and the second baffle 25 are larger than the aperture of the opening 1011;

[0066] As in the above structure, the first baffle 24 and the second baffle 25 are used to fix the sealing plug 22, so that the rod body 21 can drive the sealing plug 22 to move. The diameter of the first baffle 24 is smaller than the opening 1011, while the diameter of the second baffle 25 is larger than the opening 1011. When sealing, the first baffle 24 can enter the opening 1011, while the second baffle 25 can press the sealing plug 22 to block the opening 1011. In this structure, the U-shaped sealing portion 222 will close when subjected to pressure, and even when the pressure is relatively small, the sealing portion 222 will abut against the bottom shell 6, which is conducive to ensuring the sealing performance.

[0067] The actuator 2 and the driving member 4 in the electronic valve cooperate with the partition 5 to form a positive pressure valve, while the negative pressure spring 8 and the valve plate 9 cooperate with the bottom shell 6 to form a negative pressure valve. In this way, the electronic valve integrates the functions of the conventional FLVV valve, ROV valve and FTIV valve, has a compact structure, is easy to assemble and does not take up space, which is very suitable for the use requirements of thin fuel tanks of vehicles.

[0068] Specific implementation steps:

[0069] When the fuel tank discharges fuel vapor, the air flow is supplied through the opening 1011 of the base 7, pushing the actuator 2 to move, and the air flow enters the second cavity 103, and then is discharged through the opening 1011 on the valve body 1. When reverse air supply is performed, the gas is input into the second cavity 103 through the opening 1011 on the valve body 1, and then pushes the valve plate 9 through the through hole 601. At this time, the negative pressure spring 8 is compressed, and the gas passes through the through hole 601 and is then discharged through the opening 1011 opened on the base 7;

[0070] When the internal pressure of the oil tank is too high, the PCBA4 controls the driving component 3 to be energized, and the driving component 3 actively controls the displacement of the actuator 2 to connect the flow channel 101 to achieve active exhaust.

[0071] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A small electronic valve, comprising a valve body (1), wherein the valve body (1) is provided with a through-flow channel (101), wherein the flow channel (101) has at least two openings (1011) provided on a side wall of the valve body (1); Features: It also includes an actuator (2), a driving component (3) and a PCBA (4), wherein: The actuator (2) is arranged in the valve body (1); The driving member (3) is arranged in the valve body (1), and the driving member (3) is used to drive the actuator (2) to move so as to control the opening and closing of the flow channel (101); The PCBA (4) is arranged in the valve body (1), and the PCBA (4) is electrically connected to the driving component (3). The PCBA (4) controls the voltage signal of the driving component (3) using a PWM control module.

2. The small electronic valve according to claim 1, characterized in that: It also comprises a partition (5), wherein the partition (5) is arranged in the valve body (1) to separate the internal space of the valve body (1) into a first cavity (102) and a second cavity (103), wherein: The driving component (3) and the PCBA (4) are arranged in the first cavity (102); The opening (1011) is provided on a side wall of the valve body (1) corresponding to the second cavity (103), and the opening (1011) and the second cavity (103) form the flow channel (101); The actuator (2) is connected to the driving member (3), and the actuator (2) penetrates the partition (5) and extends into the second cavity (103).

3. The small electronic valve according to claim 2, characterized in that: One end of the valve body (1) away from the second cavity (103) is an openable structure.

4. The small electronic valve according to claim 2, characterized in that: The driving component (3) and the PCBA (4) are connected to the inner wall of the first cavity (102) or the partition (5).

5. The small electronic valve according to any one of claims 2 to 4, characterized in that: The actuator (2) is a guide rod of an electromagnet coil assembly, and the driving component (3) is an electromagnet coil assembly.

6. The small electronic valve according to claim 5, characterized in that: It also comprises a bottom shell (6), wherein the bottom shell (6) is detachably connected to one end of the valve body (1) so as to seal an end of the second cavity (103) away from the first cavity (102); At least one opening (1011) is provided on the bottom shell (6).

7. The small electronic valve according to claim 6, characterized in that: It also includes a base (7), a negative pressure spring (8) and a valve plate (9), wherein: The base (7) is arranged on an end of the bottom shell (6) away from the valve body (1), and a third cavity (104) is formed between the base (7) and the bottom shell (6); the base (7) is provided with at least one opening (1011), and the opening (1011) of the base (7) is arranged opposite to the opening (1011) of the bottom shell (6); The bottom shell (6) is provided with a through hole (601) corresponding to the third cavity (104); The negative pressure spring (8) is arranged in the third cavity (104), and the negative pressure spring (8) is connected to the base (7); The valve plate (9) is arranged on one end of the negative pressure spring (8) close to the bottom shell (6), and the valve plate (9) abuts against the bottom shell (6) and blocks the through hole (601).

8. The small electronic valve according to claim 5, characterized in that: The guide rod of the electromagnet coil assembly comprises a rod body (21), a sealing plug (22) and a positive pressure spring (23), wherein: One end of the rod body (21) is connected to the electromagnet coil assembly, and the rod body (21) passes through the partition (5) and extends into the second cavity (103); The sealing plug (22) is arranged on one end of the rod body (21) located in the second cavity (103); The positive pressure spring (23) is sleeved on the rod body (21), the positive pressure spring (23) is located in the second cavity (103), and one end of the positive pressure spring (23) abuts against the partition plate (5), and the other end abuts against the rod body (21).

9. The small electronic valve according to claim 8, characterized in that: The electromagnetic coil assembly guide rod further comprises a first baffle (24) and a second baffle (25), and the sealing plug (22) comprises a connecting portion (221) and a sealing portion (222), wherein: The first baffle (24) is arranged on an end of the rod body (21) away from the electromagnet coil assembly, and the diameter of the first baffle (24) is smaller than the aperture of the opening (1011); The second baffle (25) is arranged on the rod body (21), and the second baffle (25) is closer to the electromagnet coil assembly than the first baffle (24); The connecting portion (221) of the sealing plug (22) is assembled between the first baffle (24) and the second baffle (25), and the diameter of the connecting portion (221) is greater than the diameter of the first baffle (24); The sealing portion (222) is arranged at the periphery of the connecting portion (221), the sealing portion (222) is in a U-shaped opening shape, and the diameters of the sealing portion (222) and the second baffle (25) are greater than the aperture of the opening (1011).

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