Urea box vent valve, urea box and vehicle

Abstract

The utility model belongs to the technical field of urea boxes, and provides a urea box vent valve, a urea box and a vehicle. The urea box vent valve comprises a valve body, a floating assembly and a control assembly; an exhaust channel is formed in the valve body; the floating assembly is connected to the valve body, the floating assembly comprises a floating part, the floating part can move relative to the exhaust channel, and the floating part can move between a first position where the exhaust channel is closed and a second position where the exhaust channel is opened; the control assembly is in electromagnetic induction connection with the floating part so that the floating part can be kept at the second position and can be released. The technical problem that a vent valve is prone to impact leakage under the condition that the liquid level of a urea solution in a urea box is high is solved.

Description

Technical Field

[0001] The present application belongs to the technical field of urea tanks, and in particular relates to a urea tank vent valve, a urea tank and a vehicle. Background Art

[0002] The urea tank system includes a tank body for accommodating urea solution and a vent valve connected to the tank body for balancing the pressure inside and outside the tank body. Since the vent valve needs to balance the pressure inside and outside the tank body, it can be known that the vent valve is connected to the interior of the tank body. However, the interior of the tank body is filled with urea solution. When the amount of urea solution added is large and the liquid level is high, the vehicle shakes and impacts during driving, and the urea solution will impact the outlet of the exhaust channel of the vent valve, which can easily cause leakage of the urea solution and affect driving safety. Utility Model Content

[0003] The purpose of the present application is to provide a urea tank vent valve, a urea tank and a vehicle, aiming to solve the technical problem that the vent valve is prone to impact leakage when the liquid level of the urea solution in the urea tank is high.

[0004] The first object of the present application is to provide a urea tank vent valve, which is used to be installed on the box body of the urea tank, comprising:

[0005] A valve body formed with an exhaust passage;

[0006] a floating assembly connected to the valve body, the floating assembly comprising a floating component, the floating component being movable relative to the exhaust passage, and the floating component being movable between a first position for closing the exhaust passage and a second position for opening the exhaust passage; and

[0007] A control component is connected to the floating component by electromagnetic induction to keep the floating component at the second position and to release the floating component.

[0008] In one embodiment, the control component includes a magnetic element, the floating component is magnetic, and the magnetic element can attract or repel the floating component to the second position.

[0009] In one embodiment, the magnetic element includes an electromagnetic coil; the control component also includes a power supply component, and the power supply component is electrically connected to the electromagnetic coil.

[0010] In one embodiment, the control component also includes a pressure detection component, which is used to be arranged in the box body to obtain the pressure value inside the box body. The pressure detection component is communicatively connected with the power supply component to enable the power supply component to adjust the supply voltage according to the pressure value.

[0011] In one embodiment, the floating component further includes an elastic component, which is connected to the floating component and is used to push or pull the floating component to move.

[0012] In one embodiment, the exhaust passage has an exhaust inlet and an exhaust outlet, and the floating component is arranged on one side of the exhaust inlet; the urea tank ventilation valve also includes a breathable membrane, which is arranged in the exhaust passage and arranged between the exhaust outlet and the floating component.

[0013] In one of the embodiments, a protrusion extending outwardly toward the center of the exhaust channel is formed on the inner wall of the exhaust channel, and the surface of the floating component can abut against the surface of the protrusion to close the exhaust channel.

[0014] In one embodiment, the floating component has a first sealing surface, which is hemispherical; the exhaust passage has a second sealing surface, which is an annular curved surface, and the first sealing surface can abut against the second sealing surface to close the exhaust passage.

[0015] The second object of the present application is to provide a urea tank, the urea tank comprising a tank body and a urea tank vent valve as described in any one of the above items, a accommodating space is formed in the tank body, the urea tank vent valve is connected to the tank body and communicates with the accommodating space; the urea tank also includes a liquid level detection component arranged in the tank body, and the liquid level detection component is communicatively connected to the control component.

[0016] The third object of the present application is to provide a vehicle, comprising a urea tank vent valve as described in any one of the above items, or comprising a urea tank as described in any one of the above embodiments, and the vehicle further comprises a vehicle speed detection component, and the vehicle speed detection component is communicatively connected to the control component.

[0017] The beneficial effects of the urea box vent valve, urea box and vehicle of the present application are as follows: in the urea box vent valve, urea box and vehicle, the vent valve uses electromagnetic induction to control the floating component to be in the second position of opening the exhaust channel through the control component, so that the exhaust channel remains unobstructed, and the accommodating space of the box body can communicate with the external space through the exhaust channel of the valve body, thereby maintaining the air pressure in the box body stable; when the urea solution is excessively filled, the control component unlocks the control of the floating component, and the urea solution generates buoyancy on the floating component, and the buoyancy enables the floating component to move from the second position to the first position to block the exhaust channel, so that the urea solution cannot leak from the first position of the exhaust channel even if it shakes, so that the urea box can maintain good sealing under high liquid level and driving shaking, reduce the risk of leakage, and play a protective role. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a cross-sectional view of a urea tank vent valve provided in an embodiment of the present application. Figure 1 ;

[0020] Figure 2 This is a cross-sectional view of a urea tank vent valve provided in an embodiment of the present application. Figure 2 ;

[0021] Figure 3 It is a schematic diagram of the external structure of another urea tank vent valve provided in an embodiment of the present application;

[0022] Figure 4 yes Figure 3 A top view of

[0023] Figure 5 It is a structural schematic diagram of a urea tank provided in an embodiment of the present application;

[0024] Figure 6 It is a logic control block diagram of a control component in a vehicle controlling the movement of a floating component provided by an embodiment of the present application.

[0025] Explanation of the reference numerals: 100, urea tank; 10, ventilation valve; 11, valve body; 111, exhaust channel; 112, exhaust inlet; 113, exhaust outlet; 114, raised portion; 115, second sealing surface; 12, floating assembly; 121, floating component; 1211, first sealing surface; 122, elastic component; 13, control assembly; 131, electromagnetic coil; 132, power supply component; 14, breathable membrane; 15, ventilation duct; 16, sealing ring; 20, housing; 21, accommodating space; 30, urea pump. DETAILED DESCRIPTION

[0026] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0027] In the description of the present application, it should be understood that the terms "length", "width", "upper", "lower", "upward", "vertical", "horizontal", "bottom", "inside", "outside", "inner side", "outer side" and the like indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0028] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the feature. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0029] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0030] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0031] See also Figure 1-4 As shown, the embodiment of the present application provides a urea tank vent valve 10, which is used to be installed on the box body 20 of the urea tank 100. The urea tank vent valve 10 can be referred to as a vent valve. The urea tank vent valve 10 includes a valve body 11, a floating assembly 12 and a control assembly 13; the valve body 11 is formed with an exhaust channel 111; the floating assembly 12 is connected to the valve body 11, and the floating assembly 12 includes a floating component 121, the floating component 121 can move relative to the exhaust channel 111, and the floating component 121 can move between a first position closing the exhaust channel 111 and a second position opening the exhaust channel 111; the control assembly 13 is electromagnetically inductively connected to the floating component 121 to keep the floating component 121 at the second position and can release the floating component 121.

[0032] Specifically, the valve body 11 is a main structure for connecting with external components, and the external components may include the box body 20 of the urea tank 100. The box body 20 may be provided with a mounting hole, and the valve body 11 may be installed in the mounting hole to be connected to the box body 20. An exhaust passage 111 is formed in the valve body 11, and the exhaust passage 111 may be a through hole provided inside the valve body 11. The exhaust passage 111 has an exhaust inlet 112 and an exhaust outlet 113. When the valve body 11 is connected to the box body 20, the exhaust inlet 112 can be connected to the accommodating space 21 inside the box body 20, and the exhaust outlet 113 is connected to the external space. The exhaust outlet 113 may be connected to a ventilation conduit 15, so that the exhaust outlet 113 is connected to the external space through the ventilation conduit 15. The ventilation conduit 15 may be made of metal or non-metallic material.

[0033] The floating assembly 12 is connected to the valve body 11. The floating assembly 12 at least includes a movable floating component 121. The floating component 121 can be an independent component or a movable part of the floating assembly 12. The floating component 121 can move relative to the valve body 11 and the exhaust channel 111. The floating component 121 can move to a first position and a second position relative to the exhaust channel 111, respectively, wherein the first position is a position where the floating component 121 is connected to the exhaust channel 111, so that the floating component 121 closes the exhaust channel 111. The floating component 121 is connected to the exhaust channel 111 in a manner that the surface of the floating component 121 is connected to the exhaust channel 111. The inner wall of the exhaust channel 111 or the exhaust inlet 112 of the exhaust channel 111 abuts against each other to achieve the purpose of blocking the exhaust channel 111; wherein the second position is the position where the floating component 121 is separated from the exhaust channel 111, so that the floating component 121 can avoid the exhaust channel 111, so that the exhaust channel 111 is connected, and the exhaust channel 111 can connect the accommodating space 21 inside the box body 20 and the external space. The separation of the floating component 121 from the exhaust channel 111 refers to the formation of a gap space between the floating component 121 and the inner wall of the exhaust channel 111 or the exhaust inlet 112 of the exhaust channel 111, so that the gas can flow through the gap space and enter the exhaust channel 111.

[0034] The float assembly 12 may further include a connecting component connected between the float component 121 and the valve body 11 . For example, the connecting component may be an elastic component 122 described below, so that the float component 121 moves relative to the valve body 11 and the exhaust passage 111 through the elastic component 122 .

[0035] The control component 13 is used to control the floating component 121 in the floating component 12 to be in or remain in the second position. The connection method between the control component 13 and the floating component 121 is electromagnetic induction connection. Electromagnetic induction is a kind of wireless induction. Wireless induction methods include near field communication, electromagnetic induction, infrared induction, ultrasonic induction, capacitive induction or photoelectric induction. The present application adopts electromagnetic induction, so that the control component 13 can keep the floating component 121 in the second position by electromagnetic induction without directly contacting the floating component 121. For example, the control component 13 can generate a binding force on the floating component 121 in the second position. For example, the binding force includes adsorption force or attraction force or repulsion force, so that the floating component 121 is kept in the second position. Holding can be understood as adsorption, top connection, locking, etc., that is, the control component 13 can adsorb, top connection, and lock the floating component 121 in the second position by electromagnetic signal transmission.

[0036] The control component 13 can also release the floating component 121. Release means that the control component 13 no longer generates a binding force on the floating component 121. That is to say, in the second position, after the control component 13 releases the floating component 121, an external force acts on the floating component 121, which can move the floating component 121 from the second position to the first position to close the exhaust passage 111.

[0037] The use process of the urea tank vent valve 10 is as follows: the vent valve 10 is installed on the box body 20 of the urea tank 100. The box body 20 has an accommodating space 21 inside, and the urea solution is contained in the accommodating space 21 of the box body 20. The valve body 11 is connected to the box body 20, and the exhaust channel 111 connects the accommodating space 21 and the external space. One end of the exhaust channel 111 connected to the accommodating space 21 forms an exhaust inlet 112, and the other end of the exhaust channel 111 away from the exhaust inlet 112 forms an exhaust outlet 113 connected to the external space. In the natural state, the control component 13 maintains and locks the floating component 121 in the second position by electromagnetic induction. When the floating component 121 is in the second position, the exhaust passage 111 remains unobstructed, and the accommodating space 21 of the box body 20 can communicate with the external space (such as the atmosphere) through the exhaust passage 111 of the valve body 11, thereby maintaining the air pressure in the box body 20 stable; when the urea solution is excessively filled, the liquid level of the urea solution is close to the floating component 121. At this time, the control component 13 releases and unlocks the floating component 121, and the control component 13 no longer generates a binding force on the floating component 121. The urea solution generates buoyancy on the floating component 121, so that the floating component 121 floats upward under the action of the buoyancy. The floating component 121 after floating conflicts with the inner wall of the exhaust passage 111, thereby blocking the exhaust passage 111. Then, when the urea solution at the bottom of the floating component 121 shakes during driving, it will not leak to the external space through the exhaust passage 111, thereby playing a role in preventing impact leakage and protection, thereby improving driving safety.

[0038] In the present embodiment, the vent valve 10 uses electromagnetic induction to control the floating component 121 to be in the second position of opening the exhaust passage 111 through the control component 13, so that the exhaust passage 111 remains unobstructed, and the accommodating space 21 of the box body 20 can communicate with the external space through the exhaust passage 111 of the valve body 11, thereby maintaining the air pressure in the box body 20 stable; when the urea solution is excessively filled, the control component 13 unlocks the control of the floating component 121, and the urea solution generates buoyancy on the floating component 121, and the buoyancy enables the floating component 121 to move from the second position to the first position to block the exhaust passage 111, so that the urea solution cannot leak from the first position of the exhaust passage 111 even if it shakes, so that the urea tank 100 can maintain good sealing under high liquid level and driving shaking, reduce the risk of leakage, and play a protective role; the vent valve 10 can maintain good sealing, reduce impact leakage, and can actively release pressure to maintain the pressure balance of the urea tank 100.

[0039] In one embodiment, the control component 13 includes a magnetic element, which can attract or repel the floating component 121 to the second position.

[0040] Among them, the magnetic element may include an electromagnetic coil 131, etc. The magnetic element can generate a magnetic field by itself or generate a magnetic field after being connected to an external power supply. Since the floating component 121 is located in the magnetic field generated by the magnetic element, the floating component 121 is magnetic. Therefore, through the action of the magnetic field, the floating component 121 can be attracted or repelled by the magnetic element. The magnetic element generates an adsorption force or a repulsive force on the floating component 121, so that the floating component 121 can be maintained in the second position.

[0041] Specifically, when the magnetic element adopts the electromagnetic coil 131, the electromagnetic coil 131 is a coil wound by a conductive material, and the electromagnetic coil 131 can generate a magnetic field after being connected to a power source. The working principle of the electromagnetic coil 131 is based on the principle of electromagnetic induction. When the current passes through the electromagnetic coil 131, the magnetic field generated by the electromagnetic coil 131 will interact with the target object (i.e., the floating component 121), thereby generating a magnetic field force to achieve the effect of attraction or repulsion. Specifically, when the current flows through the electromagnetic coil 131, a magnetic field will be generated near the electromagnetic coil 131, and the floating component 121 will also be magnetized to form a magnetic field with one extreme north and one extreme south. Due to the effect of magnetism, the floating component 121 will be attracted or repelled by the electromagnetic coil 131 to remain in the second position.

[0042] The floating component 121 can be made of a metal material that can be magnetized. For example, the floating component 121 can be made of a ferromagnetic material, wherein the ferromagnetic material includes metal components such as iron, cobalt, and nickel, such as soft magnetic materials such as iron, steel, and silicon steel, and hard magnetic materials such as nickel cobalt, samarium cobalt, ferrite, and neodymium iron boron.

[0043] In the present embodiment, the control component 13 can generate a magnetic field through a magnetic element by means of magnetic induction or electromagnetic induction, thereby generating an attractive force or a repulsive force on the floating component 121 which is in the magnetic field and has magnetism, so that the floating component 121 can be maintained in the second position to keep the exhaust passage 111 unobstructed; when the magnetic field disappears, the magnetic component no longer attracts or repels the floating component 121, and the floating component 121 can move to the first position under the buoyancy of the urea solution to block the exhaust passage 111, so that the urea solution cannot leak from the first position of the exhaust passage 111 even if it shakes, so that the urea tank 100 can maintain good sealing when the urea solution is at a high liquid level and the vehicle shakes during driving, thereby reducing the risk of leakage and playing a protective role.

[0044] In one embodiment, referring to Figure 2 As shown, in the case where the magnetic element includes an electromagnetic coil 131 , the control component 13 further includes a power supply component 132 , and the power supply component 132 is electrically connected to the electromagnetic coil 131 .

[0045] Specifically, the power supply component 132 is used to provide current or voltage to the electromagnetic coil 131, that is, to power the electromagnetic coil 131 so that the electromagnetic coil 131 can generate a magnetic field by current; in addition, the power supply component 132 in the present application not only has the function of providing current and voltage to the electromagnetic coil 131, but also has the function of adjusting the voltage and current. Therefore, it can be seen that the power supply component 132 has a power supply module and a control module, and the control module controls the output voltage (or numerical value) or the output current (or numerical value) of the power supply module.

[0046] In this embodiment, by providing a power supply component 132, the ventilation valve 10 can directly power the electromagnetic coil 131, which is more convenient to use. In addition, the power supply component 132 can also have the function of adjusting the voltage and current, thereby changing the current flowing through the electromagnetic coil 131, and then changing the magnetic field, so as to achieve the effect of changing the attraction force on the floating component 121.

[0047] In one embodiment, the control component 13 also includes a pressure detection component; the pressure detection component is used to be arranged in the box body 20 of the urea tank 100 to obtain the pressure value inside the box body 20, and the pressure detection component is communicatively connected with the power supply component 132 to enable the power supply component 132 to adjust the supply voltage according to the pressure value.

[0048] Specifically, the pressure detection component may be a pressure sensor, which is arranged in the box body 20 of the urea tank 100 , that is, in the accommodating space 21 of the box body 20 , to obtain the pressure value inside the box body 20 .

[0049] When the pressure inside the box body 20 of the urea tank 100 is too high, the risk of leakage and explosion of the box body 20 will increase. Therefore, when the pressure inside the box body 20 reaches a preset pressure value, it is necessary to open the vent valve 10 to ventilate the accommodating space 21 of the box body 20 with the external space to balance the pressure inside the box body 20 and the external space. Therefore, in the present application, the pressure detection component is communicatively connected with the power supply component 132, specifically, the pressure detection component is communicatively connected with the control module in the power supply component 132. After the pressure inside the box body 20 reaches a preset pressure value, the control module controls the power supply module to supply power to the electromagnetic coil 131 based on the pressure value obtained by the pressure detection component, and can control the output voltage (or output current) of the power supply module based on the pressure value, and can control the size of the magnetic field generated by the electromagnetic coil 131, so that the electromagnetic coil 131 can generate different sizes of attraction or repulsion on the floating component 121. Therefore, it can be known that the attraction or repulsion of the electromagnetic coil 131 on the floating component 121 can be adjusted according to the pressure value in the box body 20, thereby improving the automatic control capability of the ventilation valve 10.

[0050] In this embodiment, by providing a power supply component 132 and a pressure detection component, and making the pressure detection component communicate with the control module in the power supply component 132, the power supply component 132 can adjust the supply voltage according to the pressure value inside the box body 20 obtained by the pressure detection component, so that the electromagnetic coil 131 can generate magnetic fields with different magnetic forces, so that the electromagnetic coil 131 can generate different attractive or repulsive forces on the floating component 121. The force applied to the floating component 121 can be adjusted according to the pressure inside the box body 20, thereby realizing automatic control of the ventilation valve 10 and making the ventilation valve 10 more intelligent.

[0051] For example, after the vehicle's engine is turned off, during the process of delayed power-off of the vehicle, the pressure in the box body 20 of the urea tank 100 is prone to abnormal conditions, and negative pressure will be generated in the box body 20. The pressure detection component can collect the pressure in the box body 20. When the pressure value obtained by the pressure detection component is abnormal, and the pressure value is greater than the preset pressure value, the power supply component 132 can energize the electromagnetic coil 131 to open the exhaust passage 111 to balance the abnormal pressure in the box body 20 during driving.

[0052] In one embodiment, referring to Figure 1 and Figure 2 As shown, the floating assembly 12 further includes an elastic component 122 , which is connected to the floating component 121 , and is used to push or pull the floating component 121 to move.

[0053] Specifically, the elastic component 122 includes a spring, which may be a coil spring. One end of the spring may be connected to the valve body 11 or to the magnetic element, and the other end of the spring is connected to the floating component 121. When the floating component 121 is in the second position, the elastic component 122 is in a compressed state. At this time, the control component 13 exerts a force on the floating component 121, and the electromagnetic coil 131 is in an energized state. When the electromagnetic coil 131 loses power, that is, the control component 13 releases the floating component 121 and does not apply a restraining force to the floating component 12, the elastic component 122 releases the elastic force, so that the floating component 121 leaves the second position and moves toward the first position. However, when the buoyancy of the urea solution causes the floating component 121 to abut against the first position, the elastic component 122 is in a stretched state.

[0054] Since urea solution is prone to crystallization, when the floating component 121 is maintained in the first position, the floating component 121 is very likely to crystallize and adhere to the inner wall of the exhaust passage 111, so that when the exhaust passage 111 needs to be opened, resistance is encountered and jamming occurs. Therefore, an elastic component 122 may be provided. In the first position, the elastic component 122 pulls the floating component 121 to assist the floating component 121 to leave the first position.

[0055] In this embodiment, the elastic component 122 is used to push or pull the floating component 121 to move. The elastic component 122 can generate a pushing force on the floating component 121 away from the second position at the second position. In addition, the elastic component 122 can also provide a force for the floating component 121 to move away from the first position. When the floating component 121 is in the first position, the elastic force of the elastic component 122 pulls the floating component 121, so that when the floating component 121 is bonded to the exhaust channel 111, it provides an auxiliary force for the floating component 121 to move and open the exhaust channel 111, so that the exhaust channel 111 can be opened more promptly.

[0056] In one embodiment, referring to Figure 1 and Figure 2 As shown, the exhaust channel 111 has an exhaust inlet 112 and an exhaust outlet 113 , and the floating component 121 is arranged on one side of the exhaust inlet 112 ; the urea tank vent valve 10 also includes a breathable membrane 14 , which is arranged in the exhaust channel 111 and arranged between the exhaust outlet 113 and the floating component 121 .

[0057] Specifically, the valve body 11 is connected to the housing 20, the exhaust inlet 112 of the exhaust channel 111 is communicated with the accommodating space 21 of the housing 20, the exhaust outlet 113 is communicated with the external space, the position of the exhaust outlet 113 is higher than the position of the exhaust inlet 112, that is, the exhaust outlet 113 is located above the exhaust inlet 112, the floating component 121 is located at the position of the exhaust inlet 112 or is located in the exhaust channel 111 and close to the exhaust inlet 112, the exhaust outlet 113 is located above the floating component 121, the floating component 121 may be at least partially located in the accommodating space 21 of the housing 20, and the floating component 121 is located below the urea solution. After the upper liquid surface of the urea solution contacts the floating component 121, buoyancy is generated on the floating component 121, so that the floating component 121 moves toward the first position under the action of the buoyancy.

[0058] The breathable membrane 14 may also be referred to as a ventilation membrane. The breathable membrane 14 is disposed in the exhaust channel 111 and is located in the exhaust channel 111 between the floating component 121 and the exhaust outlet 113. It should be noted that when the floating component 121 is located in the first position and the second position, the breathable membrane 14 is located between the floating component 121 and the exhaust outlet 113, that is, the breathable membrane 14 is located above the floating component 121.

[0059] The breathable membrane 14 is permeable to gas but blocks the passage of liquid, thereby playing a role of being breathable and waterproof. Specifically, the breathable membrane 14 can prevent gas from escaping. Urea solution may be vaporized under certain conditions (for example, at high temperature) to produce gas. The breathable membrane 14 can act as a filter to prevent gas from escaping, thereby maintaining the pressure inside the body 20 of the urea tank 100 stable. In addition, the breathable membrane 14 can play a filtering role, preventing impurities or foreign matter inside the body 20 of the urea tank 100 from entering the valve system, which helps to maintain the normal operation of the vent valve 10 and extend the service life of the vent valve 10, and reduce the failure or damage of the vent valve 10 caused by blockage of impurities.

[0060] In the present embodiment, the vent valve 10 is provided with a breathable membrane 14 which is breathable and can block liquid penetration. The breathable membrane 14 can also filter and stabilize pressure, thereby protecting the vent valve 10 as a whole. The vent valve 10 is arranged between the exhaust outlet 113 and the floating component 121. When the urea solution is at a relatively high liquid level and the vehicle shakes during driving, the buoyancy moves the floating component 121 to the first position to block the exhaust passage 111. The shaking urea solution cannot impact the position of the breathable membrane 14, and the shaking urea solution is blocked by the floating component 121 at the first position, thereby protecting the breathable membrane 14 after the floating component 121 blocks the exhaust passage 111.

[0061] In one embodiment, referring to Figure 1 and Figure 2 As shown, a protrusion 114 extending outwardly toward the center of the exhaust channel 111 is formed on the inner wall of the exhaust channel 111 , and the surface of the floating component 121 can abut against the surface of the protrusion 114 to close the exhaust channel 111 .

[0062] Specifically, the floating component 121 can block the exhaust channel 111 after being connected to the raised portion 114. It can be seen that the raised portion 114 is located at a first position, and the raised portion 114 forms a raised wall that protrudes outward from the inner wall of the exhaust channel 111. The surface of the raised portion 114 can form a raised wall. In the first position, the surface of the floating component 121 abuts against the raised wall, so that the surface where the floating component 121 is connected to the raised wall forms a sealing surface. The shape of the sealing surface can be an annular curved surface formed around the central axis of the exhaust channel 111.

[0063] Since the protrusion 114 protrudes outward from the inner wall of the exhaust passage 111, it can be known that the protrusion 114 has the functions of blocking, cooling and reflowing steam and liquid, etc. The steam formed by the heated urea solution can be blocked at the position of the protrusion 114, and the steam is blocked and cooled at the position of the protrusion 114 to form a liquid, thereby flowing downward along the protrusion 114 to the accommodating space 21 of the box body 20.

[0064] In this embodiment, by providing a protrusion 114 on the inner wall of the exhaust passage 111, the floating component 121 is sealed against the protrusion 114 at the first position, thereby improving the sealing performance when the floating component 121 is connected to the exhaust passage 111, and effectively reducing the possibility of urea solution overflow; in addition, the surface of the protrusion 114 also has the function of cooling and reflowing the steam formed by the urea solution.

[0065] In one embodiment, referring to Figure 1 and Figure 2 As shown, the floating component 121 has a first sealing surface 1211 which is hemispherical; the exhaust channel 111 has a second sealing surface 115 which is an annular curved surface. The first sealing surface 1211 can abut against the second sealing surface 115 to close the exhaust channel 111.

[0066] Specifically, the outer part of the floating component 121 can be hemispherical as a whole, and the floating component 121 has a hemispherical surface, which is the first sealing surface 1211 where the floating component 121 abuts against the exhaust channel 111; a second sealing surface 115 is formed on the exhaust channel 111, and the second sealing surface 115 can be formed on the surface of the raised portion 114, and the second sealing surface 115 is an annular curved surface, so that the first sealing surface 1211 and the second sealing surface 115 abut to form an annular sealing curved surface combination structure.

[0067] The floating component 121 can adopt a hollow structure. It can be understood that the floating component 121 forms a hollow hemisphere. The hollow structure can reduce the weight of the floating component 121. The floating component 121 is more likely to float upward under the buoyancy of the urea solution to block the exhaust channel 111, making it easier for the urea solution to support and lift the floating component 121.

[0068] The present application also provides a urea tank 100, referring to Figure 5 As shown, the urea tank 100 includes a tank body 20 and a urea tank vent valve 10 in any of the above embodiments. An accommodating space 21 is formed in the tank body 20. The urea tank vent valve 10 is connected to the tank body 20 and communicates with the accommodating space 21. The urea tank 100 also includes a urea pump 30, which is used to pump urea solution into the accommodating space 21 of the tank body 20.

[0069] The urea tank 100 also includes a liquid level detection component arranged in the tank body 20, and the liquid level detection component is communicatively connected with the control component. When the control component 13 includes a power supply component 132, or when the control component 13 includes a power supply component 132 and a pressure detection component, the liquid level detection component is communicatively connected with the power supply component 132 to start or stop supplying power to the power supply component 132.

[0070] Specifically, a mounting hole may be provided on the box body 20 , and the valve body 11 may be inserted into the mounting hole. A sealing ring 16 may be provided between the mounting hole and the valve body 11 to improve the sealing performance between the valve body 11 and the box body 20 .

[0071] The exhaust passage 111 of the ventilation valve 10 has an exhaust inlet 112 and an exhaust outlet 113. The exhaust outlet 113 is located above the exhaust inlet 112. The exhaust inlet 112 is connected to the accommodating space 21 of the box body 20. The exhaust outlet 113 is located at the upper part of the box body 20 and can be connected to the ventilation duct 15 to communicate with the external space.

[0072] The urea solution is contained in the accommodating space 21 of the box body 20. The urea solution is located below the exhaust inlet 112 and also below the floating component 121. When the amount of urea solution added increases and the liquid level of the urea solution rises, the urea solution will contact the floating component 121. The urea solution generates an upward buoyancy on the floating component 121. The first position is located above the second position. The buoyancy causes the floating component 121 to move from the second position toward the first position to block the exhaust passage 111.

[0073] The liquid level detection component can be a liquid level sensor, which is installed in the accommodating space 21 of the box body 20 to obtain the liquid level value of the urea solution in the box body 20, and then detect the size of the liquid level. Figure 6 As shown, when the liquid level of the urea solution is greater than the preset height, the control module in the control component 13 can control the power supply module to stop supplying power to the electromagnetic coil 131, so that the floating component 121 can be moved to the first position to close the exhaust channel 111; when the liquid level of the urea solution is less than the preset liquid level, the control module in the control component 13 can control the power supply module to supply power to the electromagnetic coil 131, so that the floating component 121 is adsorbed at the second position to open the exhaust channel 111, thereby maintaining the pressure balance inside and outside the box 20; wherein, the preset liquid level value can be 50% of the total height of the urea solution.

[0074] Both the pressure detection component and the liquid level detection component are communicatively connected to the control component 13. The pressure detection component and the liquid level detection component can perform detection independently and be independently controlled by the control component 13. Alternatively, the pressure detection component and the liquid level detection component can cooperate with each other through the control component 13. For example, when the pressure value obtained by the pressure detection component is greater than the preset pressure value and the liquid level value obtained by the liquid level detection component is less than the preset liquid level value, the control component 13 supplies power to the electromagnetic coil 131, so that the floating component 121 remains in the second position to ensure the smooth flow of the exhaust passage 111, so that the pressure inside and outside the box 20 is balanced.

[0075] In this example, only the urea tank 100 including the above-mentioned vent valve 10 is explained. In addition to including all the structures of the above-mentioned vent valve 10 and having the technical effects of the above-mentioned vent valve 10, the urea tank 100 in this example may also include other functional components, which will not be repeated here.

[0076] The embodiment of the present application also provides a vehicle, the vehicle includes the urea tank vent valve 10 in any embodiment, or the vehicle includes the urea tank 100 in any embodiment, the vehicle also includes a vehicle speed detection component, the vehicle speed detection component is communicatively connected with the control component 13, when the control component 13 includes a power supply component 132, or when the control component 13 includes the power supply component 132 and a pressure detection component, the vehicle speed detection component is communicatively connected with the power supply component 132 to enable the power supply component 132 to start or stop supplying power.

[0077] Specifically, the vehicle speed detection component may be a speed sensor, and the vehicle speed detection component is also installed at the engine position of the vehicle to detect the driving speed of the vehicle.

[0078] The vehicle speed detection component is communicatively connected with the control module in the power supply component 132, so that when the vehicle's running speed reaches a preset speed, at this time, the impact and leakage risks of the urea solution are relatively high, so that the power supply module stops supplying power to the electromagnetic coil 131, and the floating component 121 can be moved to the first position to close the exhaust passage 111, or, when the vehicle's running speed is less than the preset speed, at this time, the impact and leakage risks of the urea solution are relatively low, so that the power supply module supplies power to the electromagnetic coil 131, and the floating component 121 can be adsorbed in the second position to make the exhaust passage 111 unobstructed, thereby ensuring the pressure balance inside and outside the box 20.

[0079] In addition, refer to Figure 6As shown, the vehicle speed detection component can cooperate with the liquid level detection component through the control component 13. For example, when the driving speed obtained by the vehicle speed detection component is greater than the preset speed and the liquid level value obtained by the liquid level detection component is greater than the preset liquid level value (i.e., the liquid level height value), the control component 13 de-energizes the electromagnetic coil 131, and the floating component 121 moves to the first position to block the exhaust channel 111, so that the urea solution is not easy to impact the breathable membrane 14 and is not easy to leak; when the driving speed obtained by the vehicle speed detection component is less than the preset speed, but the liquid level value obtained by the liquid level detection component is greater than the preset liquid level value, although the liquid level is high, the vehicle speed is low and it is not easy to generate shaking impact, then the control component 13 can energize the electromagnetic coil 131, and the floating component 121 is adsorbed in the second position, so that the box 20 is connected with the external space to ensure the unobstructed exhaust channel 111 and balance the pressure in the box 20.

[0080] Alternatively, when the liquid level value obtained by the liquid level detection component is less than the preset liquid level value, but the vehicle speed obtained by the vehicle speed detection component is greater than the preset speed, for example, when the vehicle speed is greater than 5 km / h, but the preset liquid level value is less than 50% of the total height of the urea solution in the tank 20, although the vehicle is traveling faster, the liquid level is low and the impact risk is small, then the control component 13 energizes the electromagnetic coil 131, and the floating component 121 is adsorbed in the second position, so that the tank 20 is connected to the external space to ensure the unobstructed exhaust passage 111 and balance the pressure in the tank 20.

[0081] Among them, the frequent movement of the floating component 121 is conducive to reducing the jamming of the surface of the floating component 121 due to the accumulation of urea crystals; when the pressure detection component detects that the pressure in the box body 20 of the urea tank 100 is abnormal, the control component 13 can energize the electromagnetic coil 131 to reduce the risk of false alarm of pressure detection component failure due to blockage of the ventilation valve 10.

[0082] This example is only a further explanation of the vehicle including the above-mentioned vent valve 10 or the above-mentioned urea tank 100. The vehicle in this example includes all the structures of the above-mentioned vent valve 10 and the urea tank 100 and has the technical effects of the above-mentioned vent valve 10 and the urea tank 100, which will not be repeated here.

[0083] The above are only preferred embodiments of the present application, and only specifically describe the technical principles of the present application. These descriptions are only for explaining the principles of the present application and cannot be interpreted as limiting the scope of protection of the present application in any way. Based on the explanation here, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application, and other specific implementation methods of the present application that can be associated with the technicians in this field without creative work, should be included in the scope of protection of the present application.

Claims

1. A urea tank vent valve, used to be installed on the box body of a urea tank, characterized in that: include: A valve body formed with an exhaust passage; a floating assembly connected to the valve body, the floating assembly comprising a floating component, the floating component being movable relative to the exhaust passage, and the floating component being movable between a first position for closing the exhaust passage and a second position for opening the exhaust passage; as well as A control component is connected to the floating component by electromagnetic induction to keep the floating component at the second position and to release the floating component.

2. The urea tank vent valve according to claim 1, characterized in that: The control component includes a magnetic element, the floating component is magnetic, and the magnetic element can absorb or repel the floating component to the second position.

3. The urea tank vent valve according to claim 2, characterized in that: The magnetic element includes an electromagnetic coil; the control component also includes a power supply component, and the power supply component is electrically connected to the electromagnetic coil.

4. The urea tank vent valve according to claim 3, characterized in that: The control component also includes a pressure detection component, which is used to be arranged in the box body to obtain the pressure value inside the box body. The pressure detection component is communicatively connected with the power supply component to enable the power supply component to adjust the supply voltage according to the pressure value.

5. The urea tank vent valve according to any one of claims 1 to 4, characterized in that: The floating component further comprises an elastic component, wherein the elastic component is connected to the floating component and is used for pushing or pulling the floating component to move.

6. The urea tank vent valve according to any one of claims 1 to 4, characterized in that: The exhaust passage has an exhaust inlet and an exhaust outlet, and the floating component is arranged at one side of the exhaust inlet; the urea tank vent valve also includes a breathable membrane, which is arranged in the exhaust passage and between the exhaust outlet and the floating component.

7. The urea tank vent valve according to any one of claims 1 to 4, characterized in that: A convex portion extending outwardly toward the center of the exhaust channel is formed on the inner wall of the exhaust channel, and the surface of the floating component can abut against the surface of the convex portion to close the exhaust channel.

8. The urea tank vent valve according to any one of claims 1 to 4, characterized in that: The floating component has a first sealing surface, which is in a hemispherical shape; the exhaust passage has a second sealing surface, which is in an annular curved surface shape, and the first sealing surface can abut against the second sealing surface to close the exhaust passage.

9. A urea tank, characterized in that: The urea tank includes a tank body and a urea tank vent valve as described in any one of claims 1 to 8, wherein an accommodating space is formed in the tank body, and the urea tank vent valve is connected to the tank body and communicates with the accommodating space; the urea tank also includes a liquid level detection component arranged in the tank body, and the liquid level detection component is communicatively connected to the control component.

10. A vehicle, characterized in that: The vehicle comprises the urea tank vent valve according to any one of claims 1 to 8, or comprises the urea tank according to claim 9, and the vehicle further comprises a vehicle speed detection component, and the vehicle speed detection component is communicatively connected with the control component.

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