Cleaning nozzle and vehicle-mounted radar assembly

Abstract

The invention discloses a cleaning nozzle and a vehicle-mounted radar assembly, the cleaning nozzle is provided with a distribution cavity and a plurality of mutually spaced flow channels, each flow channel is provided with a guide flow channel section, a contraction flow channel section and an expansion flow channel section, the guide flow channel section extends outwards from the distribution cavity, and the expansion flow channel section extends outwards from the distribution cavity. The guide flow channel sections are arranged in the distribution cavity, the contraction flow channel sections extend outwards from the guide flow channel sections, the expansion flow channel sections extend downwards from the contraction flow channel sections, and cleaning liquid sequentially flows through the contraction flow channel sections and the expansion flow channel sections after being distributed to the guide flow channel sections in the distribution cavity.

Description

Technical Field

[0001] The invention relates to the technical field of vehicle-mounted radars, and in particular to a cleaning nozzle and a vehicle-mounted radar component. Background Art

[0002] In recent years, vehicles are increasingly developing towards intelligence, among which assisted driving technology is an important direction of intelligence. The realization of assisted driving technology depends on vehicle-mounted radar. When the vehicle is driving, the vehicle-mounted radar emits electromagnetic waves and receives electromagnetic waves reflected by objects. The vehicle-mounted computer can detect the surrounding environment of the vehicle based on the electromagnetic waves emitted and received by the vehicle-mounted radar, and assist the driver in controlling the vehicle state according to the detection results. Therefore, in order to ensure driving safety, the vehicle-mounted radar must accurately detect the surrounding environment of the vehicle. Accordingly, in order to accurately detect the surrounding environment of the vehicle, in addition to improving the performance of the vehicle-mounted radar, it is necessary to ensure that the detection surface of the vehicle-mounted radar is free of dirt that prevents the electromagnetic waves from passing through. At the same time, if there is dirt on the detection surface of the vehicle-mounted radar that prevents the electromagnetic waves from passing through, it must be cleaned in time. For example, in the Chinese invention patent application with publication number CN113917468A, a vehicle-mounted radar system is disclosed, which includes a radar component, a driving mechanism and a cleaning unit. The radar component includes a radar, and the driving mechanism is connected to the radar component, which is used to controllably drive the radar component to rotate or lift relative to the vehicle body, so as to expose the transmitting end of the radar outside the vehicle or hide the radar component inside the vehicle. The cleaning unit is used to controllably extend when the transmitting end is exposed outside the vehicle and spray cleaning fluid on the mirror surface of the transmitting end. Obviously, the driving mechanism and cleaning unit of the vehicle-mounted radar system in the prior art are directly converted to the cleaning component for cleaning headlights. One of the defects of this method is that the structure is complex, the cost is high, the volume is large, and it cannot fully adapt to the cleaning needs of the vehicle-mounted radar. The second defect is that the speed of the cleaning fluid spraying out of the transmitting end is slow and the impact force is small, resulting in poor cleaning effect. Summary of the invention

[0003] One object of the present invention is to provide a cleaning nozzle and a vehicle-mounted radar assembly, wherein the cleaning nozzle is specially designed and developed for the vehicle-mounted radar, so that the cleaning nozzle and the vehicle-mounted radar have better adaptability.

[0004] One object of the present invention is to provide a cleaning nozzle and a vehicle-mounted radar assembly, wherein the cleaning nozzle does not require a driving mechanism for achieving telescopic movement, which makes the cleaning nozzle of the present invention simple in structure, low in cost, and small in size, and since the cleaning nozzle has no moving parts, the cleaning nozzle of the present invention has higher reliability.

[0005] According to one aspect of the present invention, there is provided a cleaning nozzle, wherein the cleaning nozzle has a distribution chamber and at least one flow channel, the flow channel has a guide flow channel section, a contraction flow channel section and an expansion flow channel section, the guide flow channel section extends outward from the distribution chamber, the contraction flow channel section extends outward from the guide flow channel section, and the expansion flow channel section extends downward from the contraction flow channel section, and after the cleaning liquid is distributed to each of the guide flow channel sections in the distribution chamber, it flows through the contraction flow channel section and the expansion flow channel section in sequence.

[0006] According to one embodiment of the present invention, the contraction flow section has a first contraction section and a second contraction section that are interconnected, the first contraction section is connected to the guide flow section, and the second contraction section is connected to the expansion flow section, wherein an angle α is formed between an inner wall of the first contraction section and the central axis of the contraction flow section, and an angle β is formed between an inner wall of the second contraction section and the central axis of the contraction flow section, and the angle α and the angle β satisfy the relationship: α<β.

[0007] According to one embodiment of the present invention, the cleaning nozzle includes a nozzle body, a nozzle cover body and a plurality of nozzles, the nozzle body includes a cavity forming part and a plurality of nozzle mounting parts extending outward from the cavity forming part, the cavity forming part has a groove, the guide flow channel section is formed in the nozzle mounting part, and the guide flow channel section and the groove are connected, the nozzle cover body is installed in the cavity forming part, and the nozzle cover body seals the notch of the groove of the cavity forming part to form the distribution cavity between the cavity forming part and the nozzle cover body, the contraction flow channel section and the expansion flow channel section are formed in the nozzle, and the nozzle is installed in the nozzle mounting part of the nozzle body.

[0008] According to one embodiment of the present invention, the cleaning nozzle includes an orientation portion, which includes an orientation protrusion and an orientation groove. The orientation protrusion is arranged on the nozzle mounting portion of the nozzle body, and the orientation groove is arranged on the nozzle. When the nozzle is installed on the nozzle mounting portion, the orientation protrusion is inserted into the orientation groove to determine the installation direction of the nozzle.

[0009] According to one embodiment of the present invention, the cleaning nozzle includes an orientation portion, which includes an orientation protrusion and an orientation groove. The orientation protrusion is arranged on the nozzle, and the orientation groove is arranged on the nozzle mounting portion of the nozzle body. When the nozzle is installed on the nozzle mounting portion, the orientation protrusion is inserted into the orientation groove to determine the installation direction of the nozzle.

[0010] According to an embodiment of the present invention, the cleaning nozzle has a liquid inlet channel, and the liquid inlet channel is formed on the nozzle cover.

[0011] According to one embodiment of the present invention, the cleaning nozzle includes a shielding cover, which has a horizontal extension portion and a vertical extension portion extending downward from one side of the horizontal extension portion, the other side of the horizontal extension portion is installed on the top of the cavity forming portion of the nozzle body, the vertical extension portion is located on the outside of these nozzles, and there is a gap between the vertical extension portion and the cavity forming portion for avoiding clear liquid sprayed from the expansion flow channel section of the cleaning nozzle.

[0012] According to one embodiment of the present invention, the cleaning nozzle comprises an assembly plate, the assembly plate is mounted on the bottom of the cavity forming portion, and the nozzles are hidden between the shielding cover and the assembly plate.

[0013] According to one embodiment of the present invention, the nozzle body includes two assembly legs, one of which extends downward and rearward from one end of the cavity forming portion, and the other of which extends downward and outward from the other end of the cavity forming portion.

[0014] According to another aspect of the present invention, the present invention further provides a vehicle-mounted radar assembly, comprising: A vehicle-mounted radar, wherein the vehicle-mounted radar has a detection surface; A cleaning nozzle, wherein the cleaning nozzle has a distribution chamber and a plurality of flow channels spaced apart from each other, the flow channels having a guide flow channel section, a contraction flow channel section and an expansion flow channel section, the guide flow channel section extends outward from the distribution chamber, the contraction flow channel section extends outward from the guide flow channel section, and the expansion flow channel section extends downward from the contraction flow channel section, after the cleaning liquid is distributed to each of the guide flow channel sections in the distribution chamber, it flows through the contraction flow channel section and the expansion flow channel section in sequence, wherein the cleaning nozzle is arranged on the top of the vehicle-mounted radar, and the openings of each of the expansion flow channel sections of the cleaning nozzle are all above the detection surface of the vehicle-mounted radar facing the detection surface of the vehicle-mounted radar, so as to allow the cleaning liquid sprayed from the opening of the expansion flow channel section to flush the detection surface of the vehicle-mounted radar.

[0015] Compared with the prior art, the cleaning nozzle of the present invention has at least the following beneficial effects: 1. Different from the prior art method of directly using the cleaning components for cleaning headlights, the cleaning nozzle of the present invention is specially designed and developed for the vehicle-mounted radar, so the cleaning nozzle and the vehicle-mounted radar have better adaptability; 2. The cleaning nozzle of the present invention does not require a driving mechanism for realizing telescopic movement, which makes the cleaning nozzle of the present invention simple in structure, low in cost, and small in size. Moreover, since the cleaning nozzle has no moving parts, the cleaning nozzle of the present invention has higher reliability. 3. The cleaning nozzle of the present invention does not require a driving mechanism for realizing extension and retraction. The opening of the expansion flow channel section of the cleaning nozzle is always above the detection surface of the vehicle-mounted radar and faces the detection surface of the vehicle-mounted radar, which makes the cleaning nozzle have a faster response speed. That is, when the detection surface of the vehicle-mounted radar is dirty, the cleaning nozzle of the present invention can directly spray cleaning liquid toward the detection surface of the vehicle-mounted radar to clean the detection surface of the vehicle-mounted radar in time, which is crucial to ensure the safe driving of the vehicle; 4. The cleaning fluid sprayed by the cleaning nozzle of the present invention onto the detection surface of the vehicle-mounted radar is high-pressure and high-speed, which makes the cleaning fluid have stronger cleaning ability, so as to efficiently clean the detection surface of the vehicle-mounted radar, which is crucial to ensure the safe driving of the vehicle.

[0016] Other beneficial effects of the present invention will be further explained in the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional schematic diagram from one viewing angle of a vehicle-mounted radar assembly according to a preferred embodiment of the present invention.

[0018] Figure 2 It is a three-dimensional schematic diagram of the vehicle-mounted radar assembly from another perspective according to the above preferred embodiment of the present invention.

[0019] Figure 3 2 is a cross-sectional schematic diagram of the vehicle-mounted radar assembly according to the above preferred embodiment of the present invention.

[0020] Figure 4 It is a three-dimensional schematic diagram from one viewing angle of a cleaning nozzle of the vehicle-mounted radar component according to the above preferred embodiment of the present invention.

[0021] Figure 5 It is a stereoscopic schematic diagram from another perspective of the cleaning nozzle of the vehicle-mounted radar assembly according to the above preferred embodiment of the present invention.

[0022] Figure 6 It is a schematic diagram of an exploded view of the cleaning nozzle of the vehicle-mounted radar assembly according to the above preferred embodiment of the present invention from one perspective.

[0023] Figure 7It is a schematic diagram of an exploded view from another perspective of the cleaning nozzle of the vehicle-mounted radar assembly according to the above preferred embodiment of the present invention.

[0024] Figure 8 It is a cross-sectional schematic diagram of the cleaning nozzle of the vehicle-mounted radar assembly according to the above preferred embodiment of the present invention.

[0025] Fig. 9 yes Figure 8 A magnified view of the local location.

[0026] Fig.10 It is a schematic cross-sectional view of a local position of the cleaning nozzle of the vehicle-mounted radar assembly according to the above preferred embodiment of the present invention.

[0027] Fig.11 yes Fig.10 A magnified view of the local location.

[0028] Fig.12 It is a top view schematic diagram of another local position of the cleaning nozzle of the vehicle-mounted radar assembly according to the above preferred embodiment of the present invention.

[0029] Fig.13 It is a cross-sectional schematic diagram of a position of a first modified example of the cleaning nozzle of the vehicle-mounted radar assembly according to the above preferred embodiment of the present invention.

[0030] Fig.14 It is a cross-sectional schematic diagram of another position of the above-mentioned deformation example of the cleaning nozzle of the vehicle-mounted radar assembly according to the above-mentioned preferred embodiment of the present invention.

[0031] Fig.15 It is a cross-sectional schematic diagram of a position of a second variation example of the cleaning nozzle of the vehicle-mounted radar assembly according to the above preferred embodiment of the present invention.

[0032] Fig.16 It is a three-dimensional schematic diagram of a third modified example of the cleaning nozzle of the vehicle-mounted radar assembly according to the above preferred embodiment of the present invention.

[0033] Fig.17 It is a schematic diagram of a decomposition from one perspective of the above-mentioned deformation example of the cleaning nozzle of the vehicle-mounted radar assembly according to the above-mentioned preferred embodiment of the present invention.

[0034] Fig.18 It is a schematic diagram of an exploded view from another perspective of the above-mentioned deformation example of the cleaning nozzle of the vehicle-mounted radar assembly according to the above-mentioned preferred embodiment of the present invention.

[0035] Fig.19It is a cross-sectional schematic diagram of the above-mentioned deformation example of the cleaning nozzle of the vehicle-mounted radar assembly according to the above-mentioned preferred embodiment of the present invention.

[0036] Fig. 20 It is a cross-sectional schematic diagram of a fourth modified example of the cleaning nozzle of the vehicle-mounted radar assembly according to the above preferred embodiment of the present invention.

[0037] Fig.21 is a three-dimensional schematic diagram of a fifth variant example of the cleaning nozzle of the vehicle-mounted radar assembly according to the above preferred embodiment of the present invention, Fig. 22 It is a cross-sectional schematic diagram of the above-mentioned deformation example of the cleaning nozzle of the vehicle-mounted radar assembly according to the above-mentioned preferred embodiment of the present invention.

[0038] Fig.23 It is a stereoscopic schematic diagram of the sixth variation example of the cleaning nozzle of the vehicle-mounted radar assembly according to the above preferred embodiment of the present invention.

[0039] Fig.24 It is a schematic diagram of the above-mentioned deformation example of the cleaning nozzle of the vehicle-mounted radar assembly according to the above-mentioned preferred embodiment of the present invention.

[0040] Fig.25 It is a cross-sectional schematic diagram of the above-mentioned deformation example of the cleaning nozzle of the vehicle-mounted radar assembly according to the above-mentioned preferred embodiment of the present invention.

[0041] Fig.26 It is a stereoscopic schematic diagram of the seventh variation example of the cleaning nozzle of the vehicle-mounted radar assembly according to the above preferred embodiment of the present invention.

[0042] In the figure: 10. Vehicle-mounted radar; 11. Detection surface; 20. Cleaning nozzle; 201. Distribution cavity; 201a. Liquid distribution cavity; 201b. Gas distribution cavity; 202. Flow channel; 202a. Liquid flow channel; 202b. Gas flow channel; 2021. Guide flow channel section; 2022. Contraction flow channel section; 20221. First contraction section; 20222. Second contraction section; 2023. Expansion flow channel section; 2024. Jet flow channel section; 203. Liquid inlet channel; 21. Nozzle body; 211. Cavity forming part; 2111. Groove; 2112. Glue pouring groove ; 212, nozzle mounting portion; 2121, limiting boss; 213, assembly leg; 22, nozzle cover; 221, annular boss; 23, nozzle; 231, mounting cavity; 232, limiting groove; 233, blocking ring; 24, sealing ring; 25, directional portion; 251, directional protrusion; 252, directional groove; 26, shielding cover; 261, horizontal extension portion; 262, vertical extension portion; 27, assembly plate; 271, fitting surface; 28, connecting piece; 281, first set section; 282, second set section. DETAILED DESCRIPTION

[0043] Before describing in detail any embodiment of the present invention, it should be understood that the present invention is not limited in its application to the construction and arrangement details of the components described below or illustrated in the following figures. The present invention can have other embodiments and can be practiced or carried out in various ways. In addition, it should be understood that the words and terms used here are for descriptive purposes and should not be considered restrictive. The use of "including" or "having" and its variations herein is intended to cover the items and their equivalents and additional items displayed below. Unless otherwise specified or limited, the terms "install", "connect", "support" and "couple" and their variations are widely used and cover direct installation and indirect installation, connection, support and connection. In addition, "connect" and "couple" are not limited to physical or mechanical connections or connections.

[0044] Furthermore, on the first aspect, in the disclosure of the present invention, the orientations or positional relationships indicated by terms such as “longitudinal”, “transverse”, “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside” and “outside” are based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore the above terms cannot be understood as limitations on the present invention; on the second aspect, the term “one” should be understood as “at least one” or “one or more”, that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term “one” cannot be understood as a limitation on the quantity.

[0045] With reference to the accompanying drawings of the present invention Figures 1 to 12 In the following description, a vehicle-mounted radar assembly according to a preferred embodiment of the present invention will be disclosed and explained, wherein the vehicle-mounted radar assembly includes a vehicle-mounted radar 10 and a cleaning nozzle 20 disposed on the top of the vehicle-mounted radar 10, the vehicle-mounted radar 10 has a detection surface 11, and the cleaning nozzle 20 is used to clean the detection surface 11 of the vehicle-mounted radar 10. It can be understood that the electromagnetic waves emitted by the vehicle-mounted radar 10 are radiated outward through the detection surface 11 of the vehicle-mounted radar 10, and the electromagnetic waves reflected by the object are received by the vehicle-mounted radar 10 through the detection surface 11 of the vehicle-mounted radar 10.

[0046] Specifically, in the attached Figures 1 to 12 In this specific example of the vehicle-mounted radar assembly of the present invention, the cleaning nozzle 20 has a distribution chamber 201 and at least one flow channel 202. For example, the cleaning nozzle 20 can have a plurality of flow channels 202 spaced apart from each other, each of the flow channels 202 is arranged spaced apart from each other, and each of the flow channels 202 has a guide flow channel section 2021, a contraction flow channel section 2022 and an expansion flow channel section 2023, the guide flow channel section 2021 is connected to the distribution chamber 201, the contraction flow channel section 2022 extends outward from the guide flow channel section 2021, and the expansion flow channel section 2023 is provided. Section 2023 extends downward from the contraction flow channel section 2022, that is, the distribution chamber 201, the guide flow channel section 2021, the contraction flow channel section 2022 and the expansion flow channel section 2023 are connected in sequence to allow the cleaning liquid to flow through the distribution chamber 201, the guide flow channel section 2021, the contraction flow channel section 2022 and the expansion flow channel section 2023 in sequence, wherein the opening of the expansion flow channel section 2023 of each of the flow channels 202 of the cleaning nozzle 20 is always above the detection surface 11 of the vehicle-mounted radar 10 facing the detection surface 11 of the vehicle-mounted radar 10.

[0047] The process of the cleaning nozzle 20 cleaning the detection surface 11 of the vehicle-mounted radar 10 is that after the cleaning liquid is pumped into the distribution chamber 201 of the cleaning nozzle 20, the cleaning liquid is distributed to the guide flow channel section 2021 of each flow channel 202. Since the cleaning liquid enters the smaller space from the larger space, the flow rate of the cleaning liquid entering the guide flow channel section 2021 can be increased. When the cleaning liquid in the guide flow channel section 2021 enters the contraction flow channel section 2022, since the inner diameter of the contraction flow channel section 2022 gradually contracts, the flow rate of the cleaning liquid entering the contraction flow channel section 2022 can be further increased, so that the flow rate of the cleaning liquid can reach the speed of sound. When the cleaning liquid in the contraction flow channel section 2022 enters the expansion flow channel section 2023, since the inner diameter of the expansion flow channel section 2023 gradually expands, the flow rate of the cleaning liquid entering the expansion flow channel section 2023 can be further increased, so that the flow rate of the cleaning liquid can reach the supersonic speed. The supersonic cleaning fluid is then sprayed onto the detection surface 11 of the vehicle-mounted radar 10 to efficiently clean the detection surface 11 of the vehicle-mounted radar 10 .

[0048] Different from the prior art method of directly converting the cleaning assembly for cleaning headlights, the cleaning nozzle 20 of the vehicle-mounted radar assembly of the present invention is specially designed and developed for the vehicle-mounted radar 10, so the cleaning nozzle 20 and the vehicle-mounted radar 10 have better adaptability. At the same time, since the cleaning nozzle 20 of the vehicle-mounted radar assembly of the present invention does not need a driving mechanism for realizing telescopic movement, the cleaning nozzle 20 of the vehicle-mounted radar assembly of the present invention has a simple structure, low cost, and small size, and since the cleaning nozzle 20 has no moving parts, the cleaning nozzle 20 of the vehicle-mounted radar assembly of the present invention has higher reliability. In addition, the cleaning nozzle 20 of the vehicle-mounted radar assembly of the present invention does not require a driving mechanism for achieving extension and retraction, and the opening of the expansion flow channel section 2023 of the cleaning nozzle 20 is always above the detection surface 11 of the vehicle-mounted radar 10 and facing the detection surface 11 of the vehicle-mounted radar 10, which makes the cleaning nozzle 20 have a faster response speed, that is, when the detection surface 11 of the vehicle-mounted radar 10 is dirty, the cleaning nozzle 20 of the vehicle-mounted radar assembly of the present invention can directly spray cleaning fluid toward the detection surface 11 of the vehicle-mounted radar 10, so as to clean the detection surface 11 of the vehicle-mounted radar 10 in time, which is crucial to ensure the safe driving of the vehicle. More importantly, the cleaning nozzle 20 of the vehicle-mounted radar assembly of the present invention designs the flow channel 202 into the guide flow channel section 2021, the contraction flow channel section 2022 and the expansion flow channel section 2023, so that the flow rate of the cleaning liquid can be accelerated to supersonic speed, so as to increase the spray force onto the detection surface 11 of the vehicle-mounted radar 10, thereby effectively cleaning the dirt on the detection surface 11 of the vehicle-mounted radar 10.

[0049] Preferably, from a top view, the cross-sectional shape of the expanded flow channel section 2023 of the cleaning nozzle 20 is elliptical or runway-shaped, and the dimension of the cross-section in the length direction is greater than the dimension in the width direction, so that the cleaning fluid is fan-shaped when sprayed toward the detection surface 11 of the vehicle-mounted radar 10, so as to increase the cleaning area of ​​the cleaning fluid flowing through the single flow channel 202, wherein the length direction of the cross-section is perpendicular to the radiation direction of the electromagnetic waves emitted by the vehicle-mounted radar 10, and the width direction of the cross-section is consistent with the radiation direction of the electromagnetic waves emitted by the vehicle-mounted radar 10.

[0050] Reference Figure 8The contraction flow channel section 2022 of the cleaning nozzle 20 is divided into two sections, namely a first contraction section 20221 and a second contraction section 20222. The first contraction section 20221 and the second contraction section 20222 are connected to each other, the first contraction section 20221 is connected to the guide flow channel section 2021, and the second contraction section 20222 is connected to the expansion flow channel section 2023, that is, the distribution chamber 201, the guide flow channel section 2021, the first contraction section 20221, the second contraction section 20222 and the expansion flow channel section 2023 are connected in sequence, wherein the contraction rates of the first contraction section 20221 and the second contraction section 20222 are different, which is conducive to further accelerating the speed of the cleaning liquid entering the contraction flow channel section 2022.

[0051] Specifically, in this specific example of the vehicle-mounted radar assembly of the present invention, refer to the attached Figure 8 and Fig. 9 An angle α is formed between the inner wall of the first contraction section 20221 of the cleaning nozzle 20 and the central axis of the contraction flow channel section 2022, and an angle β is formed between the inner wall of the second contraction section 20222 and the central axis of the contraction flow channel section 2022, wherein the angle α is smaller than the angle β, so that the contraction rates of the first contraction section 20221 and the second contraction section 20222 are different, which is conducive to further accelerating the speed of the cleaning liquid entering the contraction flow channel section 2022.

[0052] Reference Figure 8 and Fig. 9 The diameter size of the inlet position of the first contraction section 20221 of the cleaning nozzle 20 is d1, the diameter size of the inlet position of the second contraction section 20222 is d2, the diameter size of the inlet position of the expansion flow channel section 2023 is d3, and the diameter size of the outlet position of the expansion flow channel section 2023 is d4. It can be understood that the outlet position of the first contraction section 20221 and the inlet position of the second contraction section 20222 are the same position, and the outlet position of the second contraction section 20222 and the inlet position of the expansion flow channel section 2023 are the same position.

[0053] The diameter dimension d1 at the entrance position of the first contraction section 20221 of the cleaning nozzle 20 is greater than the diameter dimension d2 at the entrance position of the second contraction section 20222. In this way, the first contraction section 20221 is contracted, and when the cleaning liquid flows through the first contraction section 20221, the flow rate of the cleaning liquid can be increased. In the present invention, the relationship between the diameter dimension d1 of the first contraction section 20221 and the diameter dimension d2 of the second contraction section 20222 can be: 0.7<d2 / d1<0.8.

[0054] The diameter dimension d2 at the inlet position of the second contraction section 20222 of the cleaning nozzle 20 is greater than the diameter dimension d3 at the inlet position of the expansion flow channel section 2023. In this way, the second contraction section 20222 is also contracted. When the cleaning liquid flows through the second contraction section 20222, the flow rate of the cleaning liquid can be further increased to reach the speed of sound. In the present invention, the relationship between the diameter dimension d2 at the inlet position of the second contraction section 20222 and the diameter dimension d3 at the inlet position of the expansion flow channel section 2023 can be: 0.3<d3 / d2<0.5. At the same time, the contraction rate of the second contraction section 20222 is greater than the contraction rate of the first contraction section 20221, which is conducive to further accelerating the speed of the cleaning liquid entering the contraction flow channel section 2022.

[0055] The diameter dimension d4 at the outlet position of the expansion flow section 2023 of the cleaning nozzle 20 is larger than the diameter dimension d3 at the inlet position of the expansion flow section 2023. In this way, the expansion flow section 2023 is expanded, and when the cleaning fluid enters the expansion flow section 2023, the flow rate of the cleaning fluid can be further increased to reach supersonic speed. In the present invention, the relationship between the diameter dimension d4 at the outlet position of the expansion flow section 2023 and the diameter dimension d3 at the inlet position of the expansion flow section 2023 can be: 2.6<d4 / d3<3.

[0056] In order to make the cleaning nozzle 20 have the distribution chamber 201 and the plurality of flow channels 202, Figures 1 to 12 In the specific example of the cleaning nozzle 20 of the vehicle-mounted radar assembly of the present invention, the cleaning nozzle 20 includes a nozzle body 21 , a nozzle cover 22 and a plurality of nozzles 23 .

[0057] Specifically, the nozzle body 21 includes a cavity forming portion 211 and a plurality of nozzle mounting portions 212, each of the nozzle mounting portions 212 extends outward from the cavity forming portion 211, and the cavity forming portion 211 has a groove 2111. The guide flow channel section 2021 of each of the flow channels 202 of the cleaning nozzle 20 is formed in each of the nozzle mounting portions 212, and the guide flow channel section 2021 is connected to the groove 2111 of the cavity forming portion 211. Figure 5 and Figure 6The groove 2111 of the cavity forming part 211 is in the shape of an elongated strip, and the groove 2111 extends from one end of the cavity forming part 211 to the other end along the width direction of the cavity forming part 211, and each of the nozzle mounting parts 212 is distributed along the width direction of the cavity forming part 211, so that the cleaning nozzle 20 can clean the entire area of ​​the detection surface 11 of the vehicle-mounted radar 10. It can be understood that the width direction of the cavity forming part 211 of the nozzle body 21 is consistent with the radiation direction of the electromagnetic wave emitted by the vehicle-mounted radar 10.

[0058] For example, in a specific example of the present invention, the nozzle body 21 is injection molded, so that the cavity forming part 211 and the nozzle mounting part 212 of the nozzle body 21 are an integrated structure, that is, the nozzle mounting part 212 extends outward from the cavity forming part 211. When the nozzle body 21 is formed by injection molding, the guide flow channel section 2021 formed on the nozzle mounting part 212 can be a straight-cylindrical type, that is, the inner diameter size of each position of the guide flow channel section 2021 is consistent, or it can be a contraction type, that is, the inner diameter size of the end of the guide flow channel section 2021 close to the cavity forming part 211 is larger than the inner diameter size of the end of the guide flow channel section 2021 away from the cavity forming part 211. The contraction type of the guide flow channel section 2021 is conducive to further accelerating the flow rate of the cleaning liquid.

[0059] The nozzle cover 22 is mounted on the cavity forming portion 211, and the nozzle cover 22 seals the notch of the groove 2111 of the cavity forming portion 211, so that the groove 2111 of the cavity forming portion 211 forms the distribution chamber 201 of the cleaning nozzle 20 between the nozzle cover 22 and the cavity forming portion 211. The cleaning nozzle 20 has a liquid inlet channel 203, and the liquid inlet channel 203 can be formed in the nozzle cover 22, and the cleaning liquid is allowed to be pumped into the distribution chamber 201 through the liquid inlet channel 203. Optionally, in other examples of the vehicle-mounted radar assembly of the present invention, the liquid inlet channel 203 of the cleaning nozzle 20 can also be formed in the cavity forming portion 211, so that the cleaning liquid can also be pumped into the distribution chamber 201.

[0060] The contraction flow section 2022 and the expansion flow section 2023 of the cleaning nozzle 20 are respectively formed on the nozzle 23, and the nozzle 23 is installed on the nozzle mounting portion 212 of the nozzle body 21, so that the contraction flow section 2022 and the guide flow section 2021 of the cleaning nozzle 20 are connected. Specifically, the nozzle 23 has an installation cavity 231, the installation cavity 231 is connected to the contraction flow channel section 2022, and the inner diameter of the installation cavity 231 is larger than the inner diameter of the contraction flow channel section 2022, wherein the nozzle 23 is installed on the nozzle installation portion 212 in a manner that the nozzle installation portion 212 of the nozzle body 21 extends into the installation cavity 231 of the nozzle 23, at which time the contraction flow channel section 2022 and the guide flow channel section 2021 of the cleaning nozzle 20 are automatically connected, which not only helps to simplify the installation process of the nozzle 23, but also allows the inner diameter of the contraction flow channel section 2022 of the cleaning nozzle 20 to match the inner diameter of the guide flow channel section 2021.

[0061] In order to prevent the nozzle 23 from falling off the nozzle mounting portion 212 of the nozzle body 21, in this specific example of the vehicle-mounted radar assembly of the present invention, refer to the attached Figure 8 The nozzle 23 has a limiting groove 232, and the limiting groove 232 is connected to the mounting cavity 231. Accordingly, the nozzle mounting portion 212 of the nozzle body 21 has a limiting boss 2121. After the nozzle 23 is mounted on the nozzle mounting portion 212 of the nozzle body 21, the limiting boss 2121 of the nozzle mounting portion 212 is located in the limiting groove 232 of the nozzle 23. Preferably, the limiting groove 232 of the nozzle 23 is an annular groove, and accordingly, the limiting boss 2121 of the nozzle mounting portion 212 of the nozzle body 21 may be annular.

[0062] That is to say, in the attached Figures 1 to 12In this specific example of the vehicle-mounted radar assembly of the present invention shown, the nozzle 23 and the nozzle mounting portion 212 of the nozzle body 21 are plug-in installed, that is, after the nozzle mounting portion 212 of the nozzle body 21 is inserted into the mounting cavity 231 of the nozzle 23, based on the friction force generated therebetween, the nozzle 23 can be installed on the nozzle mounting portion 212 of the nozzle body 21. In addition, the limiting groove 232 of the nozzle 23 and the limiting boss 2121 of the nozzle mounting portion 212 further increase the reliability of the installation relationship between the nozzle 23 and the nozzle mounting portion 212. The installation relationship between the nozzle 23 and the nozzle mounting portion 212 of the nozzle body 21 makes the nozzle 23 replaceable. For example, the nozzle 23 can be removed by pulling the nozzle 23 in a direction away from the nozzle body 21. After the nozzle mounting portion 212 is aligned with the mounting cavity 231 of the new nozzle 23, the new nozzle 23 can be installed on the nozzle mounting portion 212 by pushing the nozzle 23 in a direction close to the nozzle mounting portion 212 of the nozzle body 21. In this way, when the nozzle 23 is clogged, the clogged nozzle 23 can be easily replaced to complete the maintenance of the vehicle-mounted radar assembly, thereby reducing the maintenance cost of the vehicle-mounted radar assembly and thereby reducing the maintenance cost of the vehicle.

[0063] Reference Fig.12 The nozzle mounting parts 212 of the nozzle body 21 are distributed in a fan shape. In this way, after the nozzles 23 are respectively installed on the nozzle mounting parts 212 of the nozzle body 21, the nozzles 23 are also distributed in a fan shape, so that the positions of the openings of the flow channels 202 of the cleaning nozzle 20 are adapted to the arc-shaped detection surface 11 of the vehicle-mounted radar 10.

[0064] Continue to refer to the attached Figure 8 and Fig. 9 , the inner wall of the cleaning nozzle 20 used to define the second contraction section 20222 is in an arc shape, so as to guide the cleaning liquid to smoothly enter the expansion channel section 2023 from the second contraction section 2022, thereby avoiding the problem of a decrease in the flow rate of the cleaning liquid caused by the downward extension of the expansion channel section 2023 from the contraction channel section 2022. In other words, by designing the inner wall of the cleaning nozzle 20 used to define the second contraction section 20222 to be in an arc shape, even if a turn occurs in the middle of the channel 202 (i.e., the expansion channel section 2023 extends downward from the contraction channel section 2022), the flow rate of the cleaning liquid will not be reduced, which is conducive to ensuring the spraying force of the cleaning liquid toward the detection surface 11 of the vehicle-mounted radar 10.

[0065] In addition, an angle γ is formed between the outer inner wall of the expansion flow channel section 2023 of the cleaning nozzle 20 and a straight line perpendicular to the central axis of the contraction flow channel section 2022, and an angle δ is formed between the inner inner wall of the expansion flow channel section 2023 and a straight line perpendicular to the central axis of the contraction flow channel section 2022. The angle γ is smaller than the angle δ. In this way, the outer inner wall and the inner inner wall of the expansion flow channel section 2023 of the cleaning nozzle 20 have different inclination angles for guiding the cleaning fluid to be sprayed toward the detection surface 11 of the vehicle-mounted radar 10.

[0066] Reference Figure 8 The cleaning nozzle 20 includes a sealing ring 24, which is arranged between the cavity forming part 211 of the nozzle body 21 and the nozzle cover 22, to prevent a gap from being generated between the nozzle cover 22 and the cavity forming part 211 and ensure that the nozzle cover 22 seals the notch of the groove 2111 of the cavity forming part 211. It can be understood that only when the nozzle cover 22 seals the notch of the groove 2111 of the cavity forming part 211, it is possible to pressurize the cleaning liquid pumped into the distribution chamber 201 through the liquid inlet channel 203 of the cleaning nozzle 20 to a sufficiently large pressure, so that the cleaning liquid entering the guide flow channel section 2021 from the distribution chamber 201 has a sufficiently fast flow rate, so that after passing through the speed increase of the contraction flow channel section 2022 and the expansion flow channel section 2023, the cleaning liquid can be sprayed out of the cleaning nozzle 20 at a supersonic speed and sprayed toward the detection surface 11 of the vehicle-mounted radar 10.

[0067] In this specific example of the vehicle-mounted radar assembly of the present invention, refer to the attached Figure 8The sealing ring 24 of the cleaning nozzle 20 is not preset, but is formed by glue between the cavity forming part 211 and the nozzle cover 22, so that the sealing ring 24 not only has the function of preventing the generation of a gap between the nozzle cover 22 and the cavity forming part 211, but also can bond the cavity forming part 211 and the nozzle cover 22. Specifically, the cavity forming part 211 has a glue pouring groove 2112, and the glue pouring groove 2112 surrounds the notch of the groove 2111, and the nozzle cover 22 has an annular boss 221, and the size of the annular boss 221 is slightly smaller than the size of the glue pouring groove 2112, so that after the nozzle cover 22 is installed on the cavity forming part 211 and the annular boss 221 is allowed to extend to the glue pouring groove 2112, the annular boss 221 of the nozzle cover 22 and the cavity forming part 211 There is a gap between the inner walls defining the glue pouring groove 2112 to allow glue to be poured in. After the glue is poured into the gap, the glue contacts the annular boss 221 of the nozzle cover body 22 and the inner wall of the cavity forming part 211 defining the glue pouring groove 2112. The glue forms the sealing ring 24 after curing. In this way, the sealing ring 24 not only prevents the generation of a gap between the nozzle cover body 22 and the cavity forming part 211, but also can bond the cavity forming part 211 and the nozzle cover body 22.

[0068] Optionally, in other examples of the vehicle-mounted radar assembly of the present invention, the sealing ring 24 is preset, and the sealing ring 24 is installed between the cavity forming portion 211 and the nozzle cover 22. When the nozzle cover 22 is installed on the cavity forming portion 211, the nozzle cover 22 and the cavity forming portion 211 apply pressure to the sealing ring 24 to slightly deform it, so that the sealing ring 24 can prevent a gap from being generated between the nozzle cover 22 and the cavity forming portion 211.

[0069] Reference Figure 6 and Figure 7The cleaning nozzle 20 includes a directional portion 25, and the directional portion 25 is used to determine the installation direction of the nozzle 23 to ensure that the opening of the expansion flow channel section 2023 of the cleaning nozzle 20 faces the detection surface 11 of the vehicle-mounted radar 10. Specifically, the directional portion 25 includes a directional protrusion 251 and a directional groove 252. The directional protrusion 251 is provided on the nozzle mounting portion 212 of the nozzle body 21, and the directional groove 252 is provided on the nozzle 23. When the nozzle 23 is installed on the nozzle mounting portion 212, the directional protrusion 251 is inserted into the directional groove 252 to determine the installation direction of the nozzle 23, and ensure that the opening of the expansion flow channel section 2023 of the cleaning nozzle 20 faces the detection surface 11 of the vehicle-mounted radar 10. By setting the direction of the directional portion 25, whether when the cleaning nozzle 20 is assembled in a workshop or when the vehicle-mounted radar assembly is subsequently maintained by replacing the nozzle 23, it can be ensured that the opening of the expansion flow channel section 2023 of the cleaning nozzle 20 is facing the detection surface 11 of the vehicle-mounted radar 10, which is crucial for effectively cleaning the detection surface 11 of the vehicle-mounted radar 10.

[0070] Optionally, in other examples of the vehicle-mounted radar 10 of the present invention, the directional protrusion 251 is provided on the nozzle 23, and the directional groove 252 is provided on the nozzle mounting portion 212 of the nozzle body 21. When installing the nozzle 23 on the nozzle mounting portion 212, the directional protrusion 251 is inserted into the directional groove 252 to determine the installation direction of the nozzle 23 and ensure that the opening of the expansion flow channel section 2023 of the cleaning nozzle 20 is facing the detection surface 11 of the vehicle-mounted radar 10.

[0071] Reference Figures 1 to 7 as well as Fig.10 The nozzle body 21 includes two assembly legs 213, one of which is arranged to extend downward and backward from one end of the cavity forming part 211, and the other assembly leg 213 is arranged to extend downward and backward from the other end of the cavity forming part 211. The two assembly legs 213 of the nozzle body 21 are respectively installed on the vehicle-mounted radar 10 at opposite sides of the vehicle-mounted radar 10 to allow the cavity forming part 211 to be located at the top of the vehicle-mounted radar 10, so that the opening of the expansion flow channel section 2023 of the cleaning nozzle 20 is above the detection surface 11 of the vehicle-mounted radar 10 and faces the detection surface 11 of the vehicle-mounted radar 10. In other words, the cleaning nozzle 20 straddles the vehicle-mounted radar 10.

[0072] Preferably, the distance between the two assembly legs 213 of the nozzle body 21 is consistent with the width dimension of the vehicle-mounted radar 10. In this way, after the cleaning nozzle 20 is installed astride the vehicle-mounted radar 10, one assembly leg 213 of the nozzle body 21 is attached to one end of the vehicle-mounted radar 10, and the other assembly leg 213 is attached to the other end of the vehicle-mounted radar 10, and both of the assembly legs 213 can be locked to the vehicle-mounted radar 10 by screws. In this way, the cleaning nozzle 20 is prevented from shifting relative to the vehicle-mounted radar 10, thereby ensuring that the relative positions of the openings of each expansion flow channel section 2023 of the cleaning nozzle 20 and the detection surface 11 of the vehicle-mounted radar 10 will not change.

[0073] Reference Figures 3 to 8 The cleaning nozzle 20 includes a shielding cover 26, which has a horizontal extension part 261 and a vertical extension part 262 extending downward from one side of the horizontal extension part 261. The other side of the horizontal extension part 261 is installed on the top of the cavity forming part 211 of the nozzle body 21. The vertical extension part 262 is located outside the nozzles 23, and there is a gap between the vertical extension part 262 and the cavity forming part 211 to avoid the clear liquid sprayed from the expansion flow channel section 2023 of the cleaning nozzle 20. In other words, the shielding cover 26 and the nozzle body 21 form the general appearance of the cleaning nozzle 20, and shield the nozzles 23, so that the nozzles 23 are not visible visually, so as to protect the nozzles 23 and enhance the aesthetics of the cleaning nozzle 20.

[0074] Continue to refer to the attached Figures 3 to 8The cleaning nozzle 20 includes an assembly plate 27, which is installed at the bottom of the cavity forming portion 211 of the nozzle body 21. The nozzles 23 are hidden between the shielding cover 26 and the assembly plate 27. In this way, when the cleaning nozzle 20 and the vehicle-mounted radar 10 are not installed, for example, when the cleaning nozzle 20 is stored or circulated, the nozzle body 21, the shielding cover 26 and the assembly plate 27 can effectively protect the nozzles 23 and prevent the nozzles 23 from being subjected to force. When installing the cleaning nozzle 20 on the vehicle-mounted radar 10, the assembly plate 27 can have a large and flat fitting surface 271, which is conducive to ensuring that the cleaning nozzle 20 and the vehicle-mounted radar 10 are installed in place. Preferably, the fitting surface 271 of the assembly plate 27 may be sticky. During the process of installing the cleaning nozzle 20 on the vehicle-mounted radar 10, the assembly plate 27 may be bonded to the surface of the vehicle-mounted radar 10 to achieve the pre-installation of the cleaning nozzle 20 and the vehicle-mounted radar 10, thereby facilitating the subsequent locking of the assembly leg 213 and the vehicle-mounted radar 10 by screws.

[0075] Attached Fig.13 and Fig.14 Another possible implementation of the cleaning nozzle 20 of the vehicle-mounted radar assembly according to the above preferred embodiment of the present invention is shown in FIG. Figures 1 to 12 The cleaning nozzle 20 of the vehicle-mounted radar assembly shown is different in that Fig.13 and Fig.14In this specific example of the cleaning nozzle 20 of the vehicle-mounted radar component shown, the cleaning nozzle 20 has two independent distribution chambers 201, one of the distribution chambers 201 is a liquid distribution chamber 201a, and the other distribution chamber 201 is a gas distribution chamber 201b, and the liquid distribution chamber 201a and the gas distribution chamber 201b are arranged up and down, for example, the liquid distribution chamber 201a is located below the gas distribution chamber 201b, and accordingly, a part of the flow channels 202 of the cleaning nozzle 20 is a liquid flow channel 202a, and the other part is a gas flow channel 202b, and the liquid flow channel 202a and the liquid flow channel 202b are arranged at intervals. When cleaning the detection surface 11 of the vehicle-mounted radar 10, first, the cleaning nozzle 20 allows the cleaning liquid to be sprayed from these liquid flow channels 202a and toward the detection surface 11 of the vehicle-mounted radar 10 to flush the dirt attached to the detection surface 11 of the vehicle-mounted radar 10. Secondly, the cleaning nozzle 20 allows the airflow to be sprayed from these gas flow channels 202b and toward the detection surface 11 of the vehicle-mounted radar 10 to avoid the cleaning liquid from adhering to the detection surface 11 of the vehicle-mounted radar 10. In this way, the cleaning nozzle 20 can efficiently clean the detection surface 11 of the vehicle-mounted radar 10.

[0076] Attached Fig.15 Another possible implementation of the cleaning nozzle 20 of the vehicle-mounted radar assembly according to the above preferred embodiment of the present invention is shown in FIG. Figures 1 to 12 The cleaning nozzle 20 of the vehicle-mounted radar assembly shown is different in that Fig.15In this specific example of the cleaning nozzle 20 of the vehicle-mounted radar component shown, the mounting end of the nozzle 23 has a blocking ring 233 protruding from the peripheral wall, and the cleaning nozzle 20 further includes a connecting piece 28, and the connecting piece 28 has a first sleeve section 281 and a second sleeve section 282, the inner diameter dimension of the first sleeve section 281 is smaller than the inner diameter dimension of the second sleeve section 282, the inner diameter dimension of the first sleeve section 281 is consistent with the outer diameter dimension of the mounting end of the nozzle 23, and the inner diameter dimension of the first sleeve section 281 is smaller than the outer diameter dimension of the blocking ring 233 of the nozzle 23, the outer diameter dimension of the blocking ring 233 of the nozzle 23 and the inner diameter dimension of the second sleeve section 282, the second sleeve section 282 is provided with an internal thread, and accordingly, the nozzle mounting portion 212 of the nozzle body 21 is provided with an external thread, wherein the connecting piece 28 is provided with the nozzle The end portion of the expansion flow channel section 2023 of 23 is first passed through the second sleeve section 282 and is mounted on the nozzle 23, so that the blocking ring 233 of the nozzle 23 can be located inside the second sleeve section 282, and the blocking ring 233 of the nozzle 23 blocks the first sleeve section 281 to prevent the connecting piece 28 from falling off from the mounting end of the nozzle 23, wherein the internal thread of the second sleeve section 282 of the connecting piece 28 and the external thread of the nozzle mounting portion 212 of the nozzle body 21 cooperate with each other to allow the second sleeve section 282 to be screwed onto the nozzle mounting portion 212, and in this process, the connecting piece 28 presses the end face of the mounting end of the nozzle 23 toward the end face of the nozzle mounting portion 212 and maintains sealing, so that the connecting piece 28 seals the nozzle 23 to the nozzle mounting portion 212 of the nozzle body 21.

[0077] Attached Figures 16 to 19 Another possible implementation of the cleaning nozzle 20 of the vehicle-mounted radar assembly according to the above preferred embodiment of the present invention is shown in FIG. Figures 1 to 12 The cleaning nozzle 20 of the vehicle-mounted radar assembly shown is different in that Figures 16 to 19In the specific example of the cleaning nozzle 20 of the vehicle-mounted radar component shown, the guide flow channel section 2021 of the flow channel 202 of the cleaning nozzle 20 is a straight-cylindrical flow channel section, and the inner diameter size of its head end is consistent with the inner diameter size of its tail end. The contraction flow channel section 2022 of the flow channel 202 is also a straight-cylindrical flow channel section, and the inner diameter size of its head end is consistent with the inner diameter size of its tail end, and the inner diameter size of the contraction flow channel section 2022 of the flow channel 202 is smaller than the inner diameter size of the guide flow channel section 2021. In this way, after the cleaning liquid is pumped into the distribution chamber 201 of the cleaning nozzle 20, the cleaning liquid is distributed to the guide flow channel section 2021 of each of the flow channels 202. Since the cleaning liquid enters the smaller space from the larger space, the flow rate of the cleaning liquid entering the guide flow channel section 2021 can be increased. When the cleaning liquid in the guide flow channel section 2021 enters the contraction flow channel section 2022, since the inner diameter of the contraction flow channel section 2022 is smaller than the inner diameter of the guide flow channel section 2021, the flow rate of the cleaning liquid entering the contraction flow channel section 2022 can be further increased, so that the flow rate of the cleaning liquid can reach the speed of sound. When the cleaning liquid in the contraction flow channel section 2022 enters the expansion flow channel section 2023, since the inner diameter of the expansion flow channel section 2023 gradually expands, the flow rate of the cleaning liquid entering the expansion flow channel section 2023 can be further increased, so that the flow rate of the cleaning liquid can reach supersonic speed. The supersonic cleaning liquid is then sprayed onto the detection surface 11 of the vehicle-mounted radar 10 to efficiently clean the detection surface 11 of the vehicle-mounted radar 10.

[0078] Attached Fig. 20 Another possible implementation of the cleaning nozzle 20 of the vehicle-mounted radar assembly according to the above preferred embodiment of the present invention is shown in FIG. Figures 16 to 19 The cleaning nozzle 20 of the vehicle-mounted radar assembly shown is different in that Fig. 20 In this specific example of the cleaning nozzle 20 of the vehicle-mounted radar component shown, the expansion flow section 2023 of the flow channel 202 of the cleaning nozzle 20 is not connected to the guide flow section 2021 through the contraction flow section 2022, but the expansion flow section 2023 is directly connected to the guide flow section 2021.

[0079] Attached Fig. 20 and Fig.21 Another possible implementation of the cleaning nozzle 20 of the vehicle-mounted radar assembly according to the above preferred embodiment of the present invention is shown in FIG. Figures 1 to 12 The cleaning nozzle 20 of the vehicle-mounted radar assembly shown is different in that Fig. 20 and Fig.21In this specific example of the cleaning nozzle 20 of the vehicle-mounted radar component shown, the cleaning nozzle 20 has a distribution chamber 201 and a flow channel 202, the flow channel 202 has a guide flow channel section 2021, a plurality of contraction flow channel sections 2022 and a plurality of injection flow channel sections 2024, wherein the guide flow channel section 2021 is connected to the distribution chamber 201, and the space of the guide flow channel section 2021 is smaller than the space of the distribution chamber 201, so that the flow rate of the cleaning liquid entering the guide flow channel section 2021 from the distribution chamber 201 can be increased, wherein each of the contraction flow channel sections 2022 extends downward from the end of the guide flow channel section 2021, and each of the contraction flow channel sections 2022 extends downward from the end of the guide flow channel section 2021. The space of 22 is smaller than the space of the guide flow channel section 2021, and each of the contraction flow channel sections 2022 is contracted, so the flow rate of the cleaning fluid entering each of the contraction flow channel sections 2022 from the guide flow channel section 2021 can be further increased, wherein each of the jet flow channel sections 2024 extends downward from each of the contraction flow channel sections 2022, and the opening of each of the jet flow channel sections 2024 is always above the detection surface 11 of the vehicle-mounted radar 10 and facing the detection surface 11 of the vehicle-mounted radar 10, so that the high-speed cleaning fluid ejected from each of the jet flow channel sections 2024 can flush the detection surface 11 of the vehicle-mounted radar 10 to efficiently clean the detection surface 11 of the vehicle-mounted radar 10.

[0080] Attached Figure 23 to Figure 25 Another possible implementation of the cleaning nozzle 20 of the vehicle-mounted radar assembly according to the above preferred embodiment of the present invention is shown in FIG. Fig. 20 and Fig.21 The cleaning nozzle 20 of the vehicle-mounted radar assembly shown is different in that Figure 23 to Figure 25In the specific example of the cleaning nozzle 20 of the vehicle-mounted radar component shown, the cleaning nozzle 20 has a distribution chamber 201 and a flow channel 202, and the flow channel 202 has a guide flow channel section 2021 and an injection flow channel section 2024, wherein the guide flow channel section 2021 is connected to the distribution chamber 201, and the space of the guide flow channel section 2021 is smaller than the space of the distribution chamber 201, so that the flow rate of the cleaning liquid entering the guide flow channel section 2021 from the distribution chamber 201 can be increased, wherein the injection flow channel section 2024 is along the The detection surface 11 of the vehicle-mounted radar 10 extends in the width direction, the space of the jet flow channel section 2024 is smaller than the space of the guide flow channel section 2021, the jet flow channel section 2024 is connected to the guide flow channel section 2021, and the opening of the jet flow channel section 2024 is always above the detection surface 11 of the vehicle-mounted radar 10 and faces the detection surface 11 of the vehicle-mounted radar 10, so that the high-speed cleaning liquid sprayed from the jet flow channel section 2024 flushes the detection surface 11 of the vehicle-mounted radar 10 to efficiently clean the detection surface 11 of the vehicle-mounted radar 10. At the same time, since the jet flow channel section 2024 of the flow channel 202 of the cleaning nozzle 20 extends along the width direction of the detection surface 11 of the vehicle-mounted radar 10, the cleaning liquid forms a strip shape after being sprayed from the jet flow channel section 2024 of the cleaning nozzle 20 to avoid flushing blind areas and improve the cleaning effect.

[0081] Attached Fig.26 Another possible implementation of the cleaning nozzle 20 of the vehicle-mounted radar assembly according to the above preferred embodiment of the present invention is shown in FIG. Figure 23 to Figure 25 The cleaning nozzle 20 of the vehicle-mounted radar assembly shown is different in that Fig.26 In this specific example of the cleaning nozzle 20 of the vehicle-mounted radar component shown, the jet flow channel section 2024 of the cleaning nozzle 20 is contracted, that is, the inner diameter of the end of the jet flow channel section 2024 is smaller than the inner diameter of the head end, so that the flow rate of the cleaning fluid entering the jet flow channel section 2024 from the guide flow channel section 2021 can be further increased to increase the spraying force onto the detection surface 11 of the vehicle-mounted radar 10, thereby effectively cleaning the dirt on the detection surface 11 of the vehicle-mounted radar 10.

[0082] It should be understood by those skilled in the art that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be deformed or modified in any way without departing from the principles.

Claims

1. Cleaning nozzle, characterized in that, The cleaning nozzle has a distribution chamber and at least one flow channel, the flow channel has a guide flow channel section, a contraction flow channel section and an expansion flow channel section, the guide flow channel section extends outward from the distribution chamber, the contraction flow channel section extends outward from the guide flow channel section, and the expansion flow channel section extends downward from the contraction flow channel section, and after the cleaning liquid is distributed to each of the guide flow channel sections in the distribution chamber, it flows through the contraction flow channel section and the expansion flow channel section in sequence.

2. The cleaning nozzle according to claim 1, characterized in that: The contraction flow section has a first contraction section and a second contraction section which are connected to each other, wherein the first contraction section is connected to the guide flow section, and the second contraction section is connected to the expansion flow section, wherein an angle α is formed between an inner wall of the first contraction section and a central axis of the contraction flow section, and an angle β is formed between an inner wall of the second contraction section and a central axis of the contraction flow section, and the angle α and the angle β satisfy the relationship: α<β.

3. The cleaning nozzle according to claim 1 or 2, characterized in that: The cleaning nozzle includes a nozzle body, a nozzle cover and a plurality of nozzles, the nozzle body includes a cavity forming portion and a plurality of nozzle mounting portions extending outward from the cavity forming portion, the cavity forming portion has a groove, the guide flow channel section is formed at the nozzle mounting portion, and the guide flow channel section is communicated with the groove, the nozzle cover is installed at the cavity forming portion, and the nozzle cover seals the notch of the groove of the cavity forming portion to form the distribution cavity between the cavity forming portion and the nozzle cover, the contraction flow channel section and the expansion flow channel section are formed at the nozzle, and the nozzle is installed at the nozzle mounting portion of the nozzle body.

4. The cleaning nozzle according to claim 3, characterized in that: The cleaning nozzle includes an orientation portion, which includes an orientation protrusion and an orientation groove. The orientation protrusion is arranged on the nozzle mounting portion of the nozzle body, and the orientation groove is arranged on the nozzle. When the nozzle is installed on the nozzle mounting portion, the orientation protrusion is inserted into the orientation groove to determine the installation direction of the nozzle.

5. The cleaning nozzle according to claim 3, characterized in that: The cleaning nozzle includes an orientation portion, which includes an orientation protrusion and an orientation groove. The orientation protrusion is arranged on the nozzle, and the orientation groove is arranged on the nozzle mounting portion of the nozzle body. When the nozzle is installed on the nozzle mounting portion, the orientation protrusion is inserted into the orientation groove to determine the installation direction of the nozzle.

6. The cleaning nozzle according to claim 3, characterized in that: The cleaning nozzle has a liquid inlet channel, and the liquid inlet channel is formed on the nozzle cover.

7. The cleaning nozzle according to claim 3, characterized in that: The cleaning nozzle includes a shielding cover, which has a horizontal extension part and a vertical extension part extending downward from one side of the horizontal extension part, the other side of the horizontal extension part is installed on the top of the cavity forming part of the nozzle body, the vertical extension part is located on the outside of these nozzles, and there is a gap between the vertical extension part and the cavity forming part for avoiding clear liquid sprayed from the expansion flow channel section of the cleaning nozzle.

8. The cleaning nozzle according to claim 7, characterized in that: The cleaning nozzle comprises an assembly plate, which is mounted on the bottom of the cavity forming portion, and the nozzles are hidden between the shielding cover and the assembly plate.

9. The cleaning nozzle according to claim 3, characterized in that: The nozzle body includes two assembly legs, one of which extends downward and rearward from one end of the cavity forming portion, and the other of which extends downward and outward from the other end of the cavity forming portion.

10. A vehicle-mounted radar assembly, characterized in that: include: A vehicle-mounted radar, wherein the vehicle-mounted radar has a detection surface; According to any one of claims 1 to 9, the cleaning nozzle is arranged on the top of the vehicle-mounted radar, and the openings of each of the expansion flow channel sections of the cleaning nozzle are above the detection surface of the vehicle-mounted radar and face the detection surface of the vehicle-mounted radar, so as to allow the cleaning fluid sprayed from the opening of the expansion flow channel section to flush the detection surface of the vehicle-mounted radar.

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