Nitrogen-oxygen sensor control box

Abstract

The utility model discloses a nitrogen oxygen sensor control box, which comprises a control box main body, a waterproof breathable cover and a shielding cover, a cavity is arranged in the control box main body, and the shielding cover is hermetically connected to an opening of the cavity; a cavity is formed in the control box body, a first opening end and an air hole communicated with the cavity are formed in the control box body, the first opening end and the cavity are arranged in a separated mode, the first opening end is communicated with the air hole, and the waterproof ventilation cover is connected to the first opening end in a sealed mode. According to the nitrogen-oxygen sensor control box provided by the utility model, internal heat can be dissipated into external air when the internal temperature of the control box changes.

Description

Technical Field

[0001] The utility model relates to the technical field of sensors, in particular to a nitrogen and oxygen sensor control box. Background Art

[0002] In the prior art, in order to further prevent water from entering the automotive wiring harness, most automotive wiring harnesses are designed with anti-siphon solutions. The siphon phenomenon refers to the phenomenon of liquid flow caused by height difference under the action of atmospheric pressure. The anti-siphon solution generally insulates and seals the wiring points and grounding points located in the wet area.

[0003] This solution has the following problems: due to the insulation seal of the vehicle wiring harness, the high temperature generated by the operation of the components inside the nitrogen oxide sensor control box can no longer be dissipated outward through the wiring harness. The entire outer shell of the control box will be deformed by the heat, and the components inside the control box will be damaged by the heat, further reducing the service life of the product.

[0004] The disclosure of the above background technology content is only used to assist in understanding the concept and technical solution of the utility model. It does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above content has been disclosed on the filing date of this patent application, the above background technology should not be used to evaluate the novelty and creativity of the present application. Utility Model Content

[0005] In order to solve the above technical problems, the utility model proposes a nitrogen oxide sensor control box, which can dissipate internal heat to the outside air when the internal temperature of the control box changes.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] The utility model discloses a nitrogen oxygen sensor control box, comprising a control box body, a waterproof breathable cover and a shielding cover, wherein a cavity is arranged in the control box body, and the shielding cover is sealed and connected to the opening of the cavity; a first opening end and a breathable hole connected to the cavity are opened on the control box body, the first opening end is separated from the cavity, and the first opening end is connected to the breathable hole, and the waterproof breathable cover is sealed and connected to the first opening end.

[0008] Furthermore, the waterproof breathable cover comprises a cover base, an outer waterproof breathable membrane and an inner waterproof breathable membrane, the cover base is provided with a hole, the outer waterproof breathable membrane is fixedly arranged on the outside of the hole, and the inner waterproof breathable membrane is fixedly arranged on the inside of the hole.

[0009] Furthermore, a first flange is provided on the inner wall of the hole close to the cover base, so that the diameter of the hole close to the inner wall of the cover base is smaller than the diameter of the hole close to the outer wall of the cover base.

[0010] Furthermore, a cover plate and a plurality of connecting ribs are provided in the hole. The cover plate is arranged in the hole and fixedly connected to the side wall of the hole near the outer wall of the cover base through the plurality of connecting ribs, and a gap is provided between the cover plate and the first flange.

[0011] Furthermore, the cover plate is coaxially arranged with the hole, and the number of the connecting ribs is 2 to 6.

[0012] Furthermore, the cover base, the first flange, the cover plate and the plurality of connecting ribs are integrally connected.

[0013] Furthermore, a first groove is provided on the cover base at the outer side of the hole, a second groove is provided on the cover base at the inner side of the hole, the outer waterproof breathable membrane is fixedly disposed in the first groove, and the inner waterproof breathable membrane is fixedly disposed in the second groove.

[0014] Furthermore, the outer waterproof breathable membrane is adhered and fixed to the outer side of the hole, and the inner waterproof breathable membrane is adhered and fixed to the inner side of the hole.

[0015] Furthermore, a harness connection groove is provided on the control box body, and the harness connection groove is used to fix the harness connected to the external device, and the air vent and the first opening end are respectively opened on the side wall of the harness connection groove.

[0016] Furthermore, the nitrogen oxygen sensor control box also includes a circuit board, and the circuit board is fixedly connected in the cavity.

[0017] Compared with the prior art, the beneficial effect of the utility model is that: the nitrogen oxygen sensor control box provided by the utility model, by opening a cavity on the control box body, and opening an air hole connected to the cavity on the control box body, further makes the waterproof breathable cover fixedly connected to the first opening end connected to the air hole, so that the cavity in the control box body forms a breathable cavity, which can dissipate the internal heat to the outside air when the internal temperature of the control box changes, and can provide great help to waterproofness and heat dissipation.

[0018] In a further embodiment, the present invention also has the following beneficial effects:

[0019] (1) The waterproof and breathable cover adopts a double-layer waterproof and breathable membrane structure design to better ensure the waterproof performance.

[0020] (2) By arranging the first flange, the cover plate and a plurality of connecting ribs in the hole opened in the cover base, the cover base can not only meet the requirements of waterproof and breathable properties, but also further protect the waterproof and breathable membrane to avoid mechanical damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a nitrogen oxide sensor control box of a preferred embodiment of the utility model;

[0022] Figure 2 yes Figure 1 Schematic diagram of the explosion structure of the nitrogen and oxygen sensor control box;

[0023] Figure 3 yes Figure 1 A cross-sectional diagram of the nitrogen and oxygen sensor control box;

[0024] Figure 4 yes Figure 3 The enlarged schematic diagram of point A in the middle;

[0025] Figure 5 yes Figure 3 The enlarged schematic diagram of point B in the middle;

[0026] Figure 6 yes Figure 1 A schematic diagram of the structure of the cover base of the waterproof and breathable cover of the nitrogen and oxygen sensor control box;

[0027] Figure 7 yes Figure 6 The enlarged schematic diagram of the center C;

[0028] Figure 8 yes Figure 6 A schematic cross-sectional view of the middle cover substrate;

[0029] Fig. 9 yes Figure 8 Enlarged schematic diagram of point D in the middle. DETAILED DESCRIPTION

[0030] The following is a detailed description of the implementation of the utility model. It should be emphasized that the following description is only exemplary and is not intended to limit the scope and application of the utility model.

[0031] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or indirectly on the other component. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. In addition, connection can be used for both fixing and circuit / signal communication.

[0032] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the utility model 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 cannot be understood as a limitation on the utility model.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0034] like Figure 1 As shown, the first embodiment of the utility model discloses a nitrogen oxygen sensor control box 100, including a control box body 1, a waterproof breathable cover 2 and a shielding cover 3, Figures 2 to 5 A cavity 11 is provided in the control box body 1, and the shielding cover 3 is sealed and connected at the opening of the cavity 11; a first opening end 13 and a vent hole 12 communicating with the cavity 11 are provided on the control box body 1, the first opening end 13 is separated from the cavity 11, and the first opening end 13 is communicated with the vent hole 12, and the waterproof breathable cover 2 is sealed and connected at the first opening end 13.

[0035] The nitrogen oxygen sensor control box 100 further includes a circuit board 4, and the circuit board 4 is fixedly connected in the cavity 11. Specifically, the circuit board 4 is fixed in the cavity 11 by welding terminals.

[0036] The control box body 1 is provided with a harness connection slot 14 for fixing a harness 200 connected to an external device (not shown). The vent hole 12 and the first open end 13 are respectively provided on the side walls of the harness connection slot 14 .

[0037] The first opening end 13 is provided with a fixed rib structure, and the waterproof breathable cover 2 is fixed to the control box body 1 by laser welding through the fixed rib structure. The opening of the cavity 11 is provided with a second opening end 15, and the second opening end 15 is also provided with a fixed rib structure, and the shielding cover 3 is fixed to the control box body 1 by laser welding through the fixed rib structure. When the shielding cover 3 is fixed to the control box body 1, a cavity (i.e., cavity 11) is formed between the shielding cover 3 and the control box body 1, and the vent hole 12 connects the cavity (i.e., cavity 11) with the outside of the control box body 1.

[0038] Combination Figures 2 to 4 The waterproof breathable cover 2 includes a cover base 21, an outer waterproof breathable membrane 22 and an inner waterproof breathable membrane 23. The cover base 21 is provided with a hole 211, the outer waterproof breathable membrane 22 is fixedly arranged on the outer side of the hole 211, and the inner waterproof breathable membrane 23 is fixedly arranged on the inner side of the hole 211. In this embodiment, the cover base 21 is a flat rectangular parallelepiped structure.

[0039] The cover base 21 is provided with a first groove 215 on the outside of the hole 211, and a second groove 216 on the inside of the hole 211. The outer waterproof breathable membrane 22 is fixedly disposed in the first groove 215, and the inner waterproof breathable membrane 23 is fixedly disposed in the second groove 216. Further, the outer waterproof breathable membrane 22 is glued and fixed to the bottom of the first groove 215 on the outside of the hole 211, and the inner waterproof breathable membrane 23 is glued and fixed to the bottom of the second groove 216 on the inside of the hole 211. Specifically, in combination with Fig. 9 The second groove 216 may be formed by a second flange 217 disposed at the inner side wall of the cover base 21 , and the second flange 217 is disposed around the hole 211 .

[0040] A first flange 212 is provided at the inner wall of the hole 211 close to the cover base 21, so that the diameter of the hole 211 close to the inner wall of the cover base 21 is smaller than the diameter of the hole 211 close to the outer wall of the cover base 21. Figures 6 to 9 As shown, a cover plate 213 and a plurality of connecting ribs 214 are provided in the hole 211. The cover plate 213 is provided in the hole 211 and is fixedly connected to the side wall of the hole 211 near the outer wall of the cover base 21 through the plurality of connecting ribs 214, and a gap is provided between the cover plate 213 and the first flange 212. The cover plate 213 is coaxially provided with the hole 211, and the number of the connecting ribs 214 is 2 to 6.

[0041] Specifically, the cavity on the inner side of the first flange 212 forms a main recessed hole 2101, and the cover plate 213 is located directly above the main recessed hole 2101 and covers it; in this specific embodiment, a total of three connecting ribs 214 are provided, and the three connecting ribs 214 are respectively connected between the cover plate 213 and the side walls of the hole 211 to form three secondary recessed holes 2102, 2103, and 2104 in the cavity between the cover plate 213 and the hole 211, and the side edges of the main recessed hole 2101 and the side edges of the secondary recessed holes 2102, 2103, and 2104 are connected by quasi-vertical edges, and the main recessed hole 2101 and the secondary recessed holes 2102, 2103, and 2104 are on different planes. Based on the gap between the cover plate 213 and the first flange 212, that is, the main recessed hole 2101 and the secondary recessed holes 2102, 2103, and 2104 are interconnected to form a breathable cavity 2100.

[0042] Furthermore, the cover base 21, the first flange 212, the cover plate 213 and the three connecting ribs 214 are integrally connected, for example, they can be integrally formed by injection molding, which is simple to manufacture, that is, the waterproof breathable cover 2 is a plastic part. Among them, the first flange 212 and the cover plate 214 are cylindrical with a draft angle, and the connecting rib 214 is a rectangular parallelepiped with two side surfaces provided with a draft angle.

[0043] In this embodiment, the main concave hole 2101 and the cover plate 213 have the same central axis I, and the three connecting ribs 214 are unevenly distributed around the central axis I to form three sub-concave holes 2102, 2103, and 2104 of different shapes. In other embodiments, the three connecting ribs 214 can also be evenly distributed around the central axis I.

[0044] In this embodiment, the outer waterproof breathable membrane 22 and the inner waterproof breathable membrane 23 are respectively fixed to the first groove 215 and the second groove 216 surface of the cover base 21 by means of adhesive, so as to cover the front and back sides of the breathable cavity 2100. The outer waterproof breathable membrane 22, the inner waterproof breathable membrane 23 and the air hole 12 can make the air in the cavity 11 communicate with the outside, so that the temperature in the cavity 11 can be dissipated, and the heat deformation of the overall shell of the nitrogen oxygen sensor control box 100 or the heat damage of the internal components caused by high temperature can be avoided, thereby increasing the service life and reliability of the product. The double-layer insulation of the outer waterproof breathable membrane 22 and the inner waterproof breathable membrane 23 can prevent the water vapor outside the nitrogen oxygen sensor control box 100 from entering the interior to affect the electrical performance of the internal electronic components and the electrical connection performance of the terminals of the wiring harness 200.

[0045] The cover plate 213 is located above the inner waterproof breathable membrane 23 , so the cover plate 213 protects the inner waterproof breathable membrane 23 and prevents the inner waterproof breathable membrane 23 from being damaged by direct impact of foreign objects.

[0046] In summary, the nitrogen and oxygen sensor control box 100 in the preferred embodiment of the utility model, wherein a breathable cavity 2100 is provided in the waterproof breathable cover, combined with the breathable hole 12 opened on the control box body 1 and connected to the cavity 11, can dissipate the internal heat to the outside air when the internal temperature of the control box body 1 changes, and the double-layer insulation of the two waterproof breathable membranes, the outer waterproof breathable membrane 22 and the inner waterproof breathable membrane 23, ensures the waterproof performance, which can provide great help to the waterproofness and heat dissipation.

[0047] The background section of the utility model may contain background information about the problem or environment of the utility model, rather than describing the prior art by others. Therefore, the content contained in the background technology section is not an admission of the applicant to the prior art.

[0048] The above content is a further detailed description of the utility model in combination with specific / preferred embodiments, and it cannot be determined that the specific implementation of the utility model is limited to these descriptions. For ordinary technicians in the technical field to which the utility model belongs, without departing from the concept of the utility model, it can also make several substitutions or modifications to these described embodiments, and these substitutions or modifications should be regarded as belonging to the protection scope of the utility model. In the description of this specification, the description of the reference terms "an embodiment", "some embodiments", "preferred embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily target the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, in the absence of mutual contradiction, the technical personnel in this field can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples. Although the embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions and alterations can be made herein without departing from the scope defined by the appended claims.

Claims

1. A nitrogen oxide sensor control box, characterized in that: It includes a control box body, a waterproof breathable cover and a shielding cover, wherein a cavity is provided in the control box body, and the shielding cover is sealed and connected to the opening of the cavity; a first opening end and a vent hole connected to the cavity are provided on the control box body, the first opening end is separated from the cavity, and the first opening end is connected to the vent hole, and the waterproof breathable cover is sealed and connected to the first opening end.

2. The nitrogen oxide sensor control box according to claim 1, characterized in that: The waterproof breathable cover comprises a cover base, an outer waterproof breathable membrane and an inner waterproof breathable membrane. The cover base is provided with a hole, the outer waterproof breathable membrane is fixedly arranged on the outer side of the hole, and the inner waterproof breathable membrane is fixedly arranged on the inner side of the hole.

3. The nitrogen oxide sensor control box according to claim 2, characterized in that: A first flange is provided at the inner wall of the hole close to the cover base, so that the diameter of the hole close to the inner wall of the cover base is smaller than the diameter of the hole close to the outer wall of the cover base.

4. The nitrogen oxide sensor control box according to claim 3, characterized in that: A cover plate and a plurality of connecting ribs are provided in the hole. The cover plate is arranged in the hole and fixedly connected to the side wall of the hole near the outer wall of the cover base through the plurality of connecting ribs, and a gap is provided between the cover plate and the first flange.

5. The nitrogen oxide sensor control box according to claim 4, characterized in that: The cover plate is coaxially arranged with the hole, and the number of the connecting ribs is 2 to 6.

6. The nitrogen oxide sensor control box according to claim 4, characterized in that: The cover base, the first flange, the cover plate and the plurality of connecting ribs are integrally connected.

7. The nitrogen oxide sensor control box according to claim 2, characterized in that: The cover base is provided with a first groove on the outside of the hole, the cover base is provided with a second groove on the inside of the hole, the outer waterproof breathable membrane is fixedly arranged in the first groove, and the inner waterproof breathable membrane is fixedly arranged in the second groove.

8. The nitrogen oxide sensor control box according to claim 2, characterized in that: The outer waterproof breathable membrane is adhered and fixed to the outer side of the hole, and the inner waterproof breathable membrane is adhered and fixed to the inner side of the hole.

9. The nitrogen oxide sensor control box according to claim 1, characterized in that: The control box body is provided with a harness connection groove, which is used to fix the harness connected to the external device. The air vent and the first opening end are respectively arranged on the side wall of the harness connection groove.

10. The nitrogen oxide sensor control box according to claim 1, characterized in that: It also includes a circuit board, which is fixedly connected in the cavity.

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