An anti-icing sensor

Abstract

The present application provides an anti-icing sensor, which belongs to the technical field of detection equipment, and specifically includes a sensitive element, a mounting seat, and a sensor housing connected to the mounting seat. A temperature measuring end is provided on the side of the sensor housing away from the mounting seat, and an anti-icing structure is provided on the temperature measuring end. The sensitive element is connected to the sensor housing and is located on the leeward side of the temperature measuring end. The anti-icing structure is configured as a wedge-shaped structure, and the wedge-shaped structure includes a windward end and a leeward end. The cross-sections of the windward end and the leeward end parallel to the airflow direction are both isosceles triangles, and the first vertex angle of the isosceles triangle of the windward end faces the incoming flow direction, and the second vertex angle of the isosceles triangle of the leeward end faces away from the incoming flow direction, and the angle of the first vertex angle is greater than the angle of the second vertex angle. Through the processing scheme of the present application, the situation where the temperature measuring function of the sensor fails due to icing of the temperature measuring end can be effectively avoided, and the test stability can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of detection equipment, and in particular to an anti-icing sensor. Background Art

[0002] Temperature sensors can be divided into bleed air anti-icing, electric heating anti-icing, mechanical anti-icing, etc. according to their different anti-icing methods. At present, bleed air anti-icing temperature sensors mainly use gas heating anti-icing. The anti-icing hot air is mostly bleed from the engine compressor. The hot air is adjusted and controlled by the anti-icing valve to enter the front of the engine inlet or the sensor temperature measuring end to achieve the purpose of anti-icing. However, the inner cavity structure of the bleed air sensor is complex to process and requires related structures to cooperate. The weight is greatly increased and the accuracy is easily disturbed by the exhaust hot air. Electric heating temperature sensors mainly distribute gas heating wires on the surface of the shell to perform electric heating deicing. However, it is difficult to arrange and fill the heating wires of electric heating sensors, and the sensor accuracy is easily disturbed by the heating of the heating wires.

[0003] Most mechanical anti-icing temperature sensors currently have the sensitive element built into the temperature measuring end to reduce the possibility of air inlet blockage, which helps the sensor to continue to function to a certain extent. However, the structure inside the temperature measuring end with the sensitive element built into the end will significantly reduce the response time. At the same time, the sensor function is still easily lost under severe icing conditions. Summary of the invention

[0004] In view of this, an embodiment of the present application provides an anti-icing sensor, which at least partially solves the problem in the prior art that the sensor function is still easily lost under severe icing conditions.

[0005] An embodiment of the present application provides an anti-icing sensor, comprising a mounting base and a sensor housing connected to the mounting base, wherein a temperature measuring end is provided on a side of the sensor housing away from the mounting base, the temperature measuring end comprising an anti-icing structure and a sensitive element, the anti-icing structure is located on a windward side of the temperature measuring end, and the sensitive element is located on a leeward side of the temperature measuring end.

[0006] According to a specific implementation method of an embodiment of the present application, the anti-icing structure is configured as a wedge-shaped structure, and the wedge-shaped structure includes a windward end and a leeward end, and the cross-sections of the windward end and the leeward end parallel to the airflow direction are both isosceles triangles, the vertex angle of the isosceles triangle at the windward end is a first vertex angle, and the vertex angle of the isosceles triangle at the leeward end is a second vertex angle, the first vertex angle faces the incoming flow direction, the second vertex angle faces away from the incoming flow direction, and the angle of the first vertex angle is greater than the angle of the second vertex angle.

[0007] According to a specific implementation of an embodiment of the present application, a negative pressure drainage structure is provided on the anti-icing structure.

[0008] According to a specific implementation method of an embodiment of the present application, the negative pressure drainage structure includes a plurality of adsorption holes symmetrically arranged on the two side walls of the leeward end, and the area formed by the adsorption holes corresponds to the test area of ​​the sensitive element; the negative pressure drainage structure also includes a cavity arranged inside the wedge-shaped structure, the shape of the cavity is consistent with the shape of the wedge-shaped structure, and the adsorption holes are communicated with the cavity.

[0009] According to a specific implementation of the embodiment of the present application, the adsorption holes are provided in three rows on both side walls of the leeward end and are evenly arranged.

[0010] According to a specific implementation manner of the embodiment of the present application, the first vertex angle and / or the second vertex angle is set to be an arc-shaped vertex angle.

[0011] According to a specific implementation of the embodiment of the present application, the wall surface of the windward end is configured as a smooth structure.

[0012] According to a specific implementation of the embodiment of the present application, a protective cover is provided in the non-temperature measurement area of ​​the sensitive element, and the protective cover is connected to the sensor housing.

[0013] According to a specific implementation of the embodiment of the present application, a socket is connected to the mounting base, the socket is connected to an external device, the detection signal of the sensitive element is output through the socket, and a cover plate is provided on the top of the mounting base.

[0014] According to a specific implementation of the embodiment of the present application, the sensor housing is configured as a 3D printed one-piece molding structure.

[0015] Beneficial Effects

[0016] The anti-icing sensor in the embodiment of the present application adopts a wedge-shaped structure at the temperature measuring end of the sensor. Under icing conditions, the wedge-shaped structure will freeze first and is easy to fall off, and the exposed sensitive element is placed in the shielding area of ​​the temperature measuring end, which greatly avoids the situation where the temperature measuring function of the sensor fails due to the freezing of the wedge-shaped structure; an adsorption hole is provided at the leeward end of the wedge-shaped structure of the temperature measuring end to form a negative pressure of the airflow, which has a drainage effect on the gas, and at the same time, the sensitive element is placed in the center after the drainage, so that the response time is optimized while ensuring reliability (good resistance to impact of impurities such as sand particles and ice crystals). BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 is a perspective view of an anti-icing sensor according to an embodiment of the present invention;

[0019] Figure 2 is a front view of an anti-icing sensor according to an embodiment of the present invention;

[0020] Figure 3 is a rear view of an anti-icing sensor according to an embodiment of the present invention;

[0021] Figure 4 is a right side view of an anti-icing sensor according to an embodiment of the present invention;

[0022] Figure 5 is a bottom view of an anti-icing sensor according to an embodiment of the present invention;

[0023] Figure 6 is a cross-sectional view of a temperature measuring end of an anti-icing sensor according to an embodiment of the present invention parallel to the airflow direction;

[0024] Figure 7 is a cross-sectional view of a temperature measuring end of an anti-icing sensor according to an embodiment of the present invention perpendicular to the airflow direction;

[0025] Figure 8 A front view of a sensor housing of an anti-icing sensor according to an embodiment of the present invention;

[0026] Fig. 9 FIG. 4 is a left side view of a sensor housing of an anti-icing sensor according to an embodiment of the present invention.

[0027] In the figure: 1, cover plate; 2, socket; 3, mounting seat; 4, sensor housing; 41, windward end; 42, leeward end; 43, adsorption hole; 44, cavity; 5, protective cover; 6, sensitive element; 7, mounting hole; 8, protective shell. DETAILED DESCRIPTION

[0028] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0029] The following describes the implementation methods of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present application.

[0030] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0031] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The drawings only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0032] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects described may be practiced without these specific details.

[0033] The embodiment of the present application provides an anti-icing sensor, which specifically includes a sensitive element 6, a mounting seat 3 and a sensor housing 4 connected to the mounting seat 3. The specific structure is as follows Figure 1-5 The mounting base 3 is located on the upper side of the sensor housing 4. The sensor can be connected to the position where the temperature needs to be detected through the mounting base 3. Specifically, the top of the mounting base 3 is welded with a cover plate 1, and the bottom of the mounting base 3 is welded to the sensor housing 4. The specific structure of the sensor housing 4 is shown in FIG. Figure 8-9 The side where the sensor housing 4 is connected to the mounting seat 3 is a base. A temperature measuring end is arranged on the side of the sensor housing 4 away from the mounting seat 3. The temperature measuring end is connected to the base. The temperature measuring end is used to detect temperature. The temperature measuring end includes an anti-icing structure and a sensitive element 6. The anti-icing structure is located on the windward side of the temperature measuring end. The sensitive element 6 is arranged to be exposed. The sensitive element 6 is connected to the sensor housing 4 and is located on the leeward side of the temperature measuring end, that is, the exposed sensitive element 6 is placed in the shielding area of ​​the temperature measuring end. The anti-icing structure can block the wind for the sensitive element 6, which can greatly avoid the icing of the anti-icing structure causing the temperature measuring function of the sensor to fail.

[0034] In order to facilitate the positioning and installation of the combined sensor, a mounting hole 7 is provided on the base of the sensor housing 4 , and the sensor housing 4 is fixedly connected through the mounting hole 7 .

[0035] In a preferred embodiment, since the anti-icing structure is located on the windward side, it is easier to ice up thereon. In order to make the ice on the anti-icing structure fall off easily, the anti-icing structure is configured as a wedge-shaped structure. Figure 2-7 , one end face of the wedge-shaped structure is larger in size, and the other end face is smaller in size. The large-sized end face of the wedge-shaped structure is connected to the base of the sensor housing 4, and the small-sized end face of the wedge-shaped structure is a free end. The wedge-shaped structure includes a windward end 41 and a leeward end 42 in a direction perpendicular to the end face. The cross-sections of the windward end 41 and the leeward end 42 parallel to the airflow direction are both isosceles triangles. The bases of the two isosceles triangles are connected. The first vertex angle of the isosceles triangle of the windward end 41 faces the incoming flow direction, and the second vertex angle of the isosceles triangle of the leeward end faces away from the incoming flow direction. The angle of the first vertex angle is greater than the angle of the second vertex angle, that is, the sharp angle of the wedge-shaped structure faces the windward surface, which plays a role in diversion and can be used to protect the exposed sensitive element 6 in the shielding area of ​​the temperature measuring end.

[0036] Furthermore, in order to make it easier for ice on the windward end 41 of the anti-icing structure to fall off, the wall surface of the windward end 41 may be set to a smooth structure, which can further avoid the loss of function of the exposed sensitive element 6.

[0037] In order to better protect the sensitive element 6, a protective shell 8 for the sensitive element 6 is also provided on the sensor housing 4. The protective shell 8 semi-encloses the sensitive element 6. Figure 1 and Figure 6 The protective shell 8 is located on the side of the sensitive element 6 facing away from the anti-icing structure. The protective shell 8 can be set to a suitable shape to semi-enclose the sensitive element 6 as needed. The top of the protective shell 8 is connected to the base on the top of the sensor housing 4.

[0038] Furthermore, in order to better divert and divert the airflow and protect the sensitive element 6 located in the shielding area of ​​the temperature measuring end, a negative pressure drainage structure is provided on the anti-icing structure. Specifically, the negative pressure drainage structure includes a cavity 44 arranged inside the wedge-shaped structure, and a plurality of adsorption holes 43 symmetrically arranged on the two side walls of the leeward end 42. Figure 4-5 The area where the adsorption hole 43 is located corresponds to the test area of ​​the sensitive element 6. The adsorption hole 43 is connected to the cavity 44. Therefore, when the airflow passing through the windward end 41 flows through the leeward end 42, a part of the airflow will enter the adsorption hole 43. Since the adsorption hole 43 is connected to the cavity 44, a negative air pressure will be formed. After passing through the adsorption hole 43, the airflow enters the cavity 44. Since the cavity 44 runs through the entire wedge-shaped structure, the airflow is discharged from the free end at the bottom of the wedge-shaped structure, thereby draining the gas. The negative pressure drainage structure formed by the adsorption hole 43 and the cavity 44 can improve the response time of the sensor.

[0039] Preferably, the shape of the cavity 44 is consistent with the shape of the wedge-shaped structure, that is, the cross-section of the cavity 44 parallel to the airflow direction is also a structure composed of the bases of two isosceles triangles connected, wherein the vertex angle of one isosceles triangle faces the windward end 41, and the vertex angle of the other isosceles triangle faces the leeward end 42, and the end face size of the cavity 44 close to the sensor housing 4 is larger than the end face size away from the sensor housing 4.

[0040] In a preferred embodiment, the adsorption holes 43 are provided in three rows on both side walls of the leeward end 42 and are evenly arranged.

[0041] Preferably, the first vertex angle and / or the second vertex angle of the wedge-shaped structure is set as an arc-shaped vertex angle.

[0042] Furthermore, in order to improve the installation stability of the sensitive element 6, the sensitive element 6 is provided with a protective cover 5, which can increase the wall thickness of the non-temperature measurement area of ​​the sensitive element 6, and the protective cover 5 also plays a role of a transfer. Specifically, the sensitive element 6 is welded to the protective cover 5, and the combination of the sensitive element 6 and the protective cover 5 is inserted into the groove of the sensor housing 4, and the protective cover 5 is connected to the sensor housing 4 by welding. The mounting seat 3 is filled with silicone rubber, and a socket 2 is welded on the side of the mounting seat 3. The socket 2 is connected to an external device and is used to output the test signal of the sensitive element 6 to the external device.

[0043] In one embodiment, the sensor housing 4 is configured as a 3D printed one-piece structure, which is processed by 3D printing and has the characteristics of high strength and good reliability.

[0044] Compared with the prior art, the embodiment provided by the present invention has a reasonable deicing and negative pressure bleed structure of the anti-icing sensor of the present application, which can not only realize physical anti-icing, but also ensure the rapid response of the sensor response time. In addition, the housing is processed by 3D printing in one piece, with high strength and good reliability.

[0045] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. An anti-icing sensor, characterized in that: It comprises a mounting seat and a sensor housing connected to the mounting seat, wherein a temperature measuring end is provided on a side of the sensor housing away from the mounting seat, the temperature measuring end comprises an anti-icing structure and a sensitive element, the anti-icing structure is located on the windward side of the temperature measuring end, and the sensitive element is located on the leeward side of the temperature measuring end; The anti-icing structure is configured as a wedge-shaped structure, the wedge-shaped structure includes a windward end and a leeward end, the cross sections of the windward end and the leeward end parallel to the airflow direction are both isosceles triangles, the vertex angle of the isosceles triangle of the windward end is a first vertex angle, the vertex angle of the isosceles triangle of the leeward end is a second vertex angle, the first vertex angle faces the incoming flow direction, the second vertex angle faces away from the incoming flow direction, and the angle of the first vertex angle is greater than the angle of the second vertex angle; The anti-icing structure is provided with a negative pressure drainage structure, which includes a plurality of adsorption holes symmetrically arranged on the two side walls of the leeward end, and the area where the adsorption holes are located corresponds to the test area of ​​the sensitive element; the negative pressure drainage structure also includes a cavity arranged inside the wedge-shaped structure, the shape of the cavity is consistent with the shape of the wedge-shaped structure, and the adsorption holes are in communication with the cavity; The non-temperature measuring area of ​​the sensitive element is covered with a protective cover, and the protective cover is connected to the sensor housing.

2. The anti-icing sensor according to claim 1, characterized in that: The adsorption holes are arranged in three rows on both side walls of the leeward end and are evenly arranged.

3. The anti-icing sensor according to claim 1, characterized in that: The first vertex angle and / or the second vertex angle is / are configured as an arc-shaped vertex angle.

4. The anti-icing sensor according to any one of claims 1 to 3, characterized in that: The wall surface of the windward end is arranged to be a smooth structure.

5. The anti-icing sensor according to claim 1, characterized in that: The mounting seat is connected with a socket, the socket is connected with an external device, and the detection signal of the sensitive element is output through the socket. A cover plate is provided on the top of the mounting seat.

6. The anti-icing sensor according to any one of claims 1-3, 5, characterized in that: The sensor housing is configured as a 3D printed one-piece structure.

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