Sensor

Abstract

The utility model discloses a sensor, which comprises a shell, an adapter seat, a temperature sensing component, an isolation sleeve and a first sealing element, the adapter seat comprises a cylinder body part, and the temperature sensing component and a connecting section are positioned in a sleeve cavity of the isolation sleeve; the sensor comprises a medium channel, the isolation sleeve is partially located in a cylinder cavity of the cylinder part, the first sealing piece is located between the isolation sleeve and the cylinder part, and the first sealing piece seals the sleeve cavity and the medium channel. According to the sensor provided by the invention, the connection section of the temperature sensing element and the pin component is arranged in the sleeve cavity of the isolation sleeve, and the first sealing element isolates the sleeve cavity from the medium channel in the radial direction of the isolation sleeve, so that the connection section is not in contact with the measured fluid, and meanwhile, the isolation sleeve and the shell and / or the isolation sleeve and the adapter are arranged in a limiting manner; the sealing reliability of the first sealing element is improved, the possibility of causing short circuit of the pin component is reduced, and the working reliability of the sensor is improved.

Description

Technical Field

[0001] This utility model relates to the field of fluid detection and control technology, and more specifically, to a sensor. Background Technology

[0002] Figure 1 The diagram provided in the background section illustrates a cross-sectional view of a sensor. The sensor includes a temperature sensing component comprising a temperature-sensitive probe 1a', a first pin 2a', and a second pin 3a', all electrically connected to the temperature-sensitive probe 1a'. In practical use, because the first pin 2a' and second pin 3a' come into contact with a medium, the presence of conductive impurities in the medium may cause a short circuit failure of the first pin 2a' and second pin 3a', thus affecting the sensor's operational reliability.

[0003] In view of this, improving the reliability of sensors provides room for improvement for those skilled in the art. Utility Model Content

[0004] This utility model provides a sensor, including a housing, an adapter, a temperature sensing component, an isolation sleeve, and a first sealing element. The housing includes an installation space, the adapter includes a cylindrical portion, at least partially located within the installation space, the temperature sensing component includes a temperature sensing element and a pin component, the pin component includes a connecting section, the connecting section is located between the adapter and the temperature sensing element, the connecting section is fixedly connected to the adapter, and electrically connected to the temperature sensing element. The temperature sensing element and the connecting section are located within the cavity of the isolation sleeve. The isolation sleeve is positioned relative to the housing and / or relative to the adapter. The sensor includes a medium channel, the isolation sleeve is partially located within the cavity of the cylindrical portion, the isolation sleeve has an open end communicating with the cavity, and the first sealing element is located between the isolation sleeve and the cylindrical portion, sealing the cavity and the medium channel.

[0005] The sensor provided in this application places the connection section of the temperature sensing element and the pin component in the cavity of the isolation sleeve. The first seal isolates the cavity from the medium channel in the radial direction of the isolation sleeve, so that the connection section does not come into contact with the fluid being measured. At the same time, the isolation sleeve and the housing and / or the isolation sleeve and the adapter are limited, which improves the sealing reliability of the first seal, reduces the possibility of short circuit of the pin component, and improves the working reliability of the sensor. Attached Figure Description

[0006] Figure 1 The background section provides a cross-sectional schematic diagram of a sensor.

[0007] Figure 2 A three-dimensional schematic diagram of a sensor according to this utility model;

[0008] Figure 3 : A cross-sectional schematic diagram of a sensor according to this utility model;

[0009] Figure 3a : A cross-sectional view of a sensor according to this utility model from another direction;

[0010] Figure 4 : Figure 3 A schematic diagram at point A in the middle;

[0011] Figure 5 : Figure 3 A schematic diagram at point B in the middle;

[0012] Figure 6 : Figure 3 A cross-sectional schematic diagram of the middle isolation sleeve;

[0013] Figure 7 : Figure 3 Cross-sectional view of the transfer connector;

[0014] Figure 8 : Figure 3 A cross-sectional schematic diagram of the inner and outer shells and the third sealing ring;

[0015] Figure 9 : Figure 3 A three-dimensional schematic diagram of the inner and outer shell;

[0016] Figure 10 : A cross-sectional schematic diagram of another sensor of this utility model;

[0017] Figure 11 : Figure 10 A schematic diagram at point C.

[0018] In the picture:

[0019] 1. Housing; 100. Receiving cavity; 101. Cavity bottom wall; 11. Installation space; 110. Medium channel; 111 / 111a. First hole; 1110 / 1110a. First connecting channel; 112 / 112a. Second hole; 1120 / 1120a. First connecting channel; 113 / 113a. Stepped portion; 12. Groove;

[0020] 2. Adapter seat; 21. Seat body; 211. Limiting surface; 212. Receiving groove; 213. Drainage cavity; 214. Pressure sensing channel; 2141. Lower drainage port; 215. Annular groove; 22. Cylinder body; 221. Cylinder wall; 222. Side hole;

[0021] 3. Temperature sensing component; 31. Temperature sensing element; 32. Pin component; 321. Conductive sheet; 322. Lead wire;

[0022] 4. Isolation sleeve; 401. Sleeve cavity; 41. First sleeve body; 411. Open end; 412. Limiting groove; 413. Limiting groove; 414. Second protrusion; 4141. Lower end face; 4142. Limiting blind hole; 42. Second sleeve body; 421. Protrusion; 4211. Closed end;

[0023] 5. First seal; 6. Second seal; 7. Pressure sensing element; 8. Third seal; 9. Socket; a. Limiting element. Detailed Implementation

[0024] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. The directional terms such as "up" and "down" used herein are... Figure 3 The positions of the components shown are defined only for clarity and convenience in expressing the technical solution. It should be understood that the directional terms used herein should not limit the scope of protection claimed in this application.

[0025] Figure 2 This is a three-dimensional schematic diagram of a sensor according to the present invention; Figure 3 This is a cross-sectional schematic diagram of a sensor according to the present invention; Figure 3a This is a cross-sectional view of a sensor according to the present invention from another direction; Figure 4 for Figure 3 A schematic diagram at point A in the middle; Figure 5 for Figure 3 A schematic diagram at point B in the middle; Figure 6 for Figure 3 A cross-sectional schematic diagram of the middle isolation sleeve; Figure 7 for Figure 3 Cross-sectional view of the transfer connector; Figure 8 for Figure 3 A cross-sectional schematic diagram of the inner and outer shells and the third sealing ring; Figure 9 for Figure 3 A three-dimensional schematic diagram of the inner shell.

[0026] It should be noted that, with Figure 3 For example, the longitudinal direction of the sensor is the axial direction of the isolation sleeve 4, and the transverse direction of the sensor is the radial direction of the isolation sleeve 4.

[0027] As shown in the figure, the sensor in this embodiment can be applied to refrigeration systems such as thermal management systems for new energy vehicles, HVAC systems, refrigeration and cold storage systems, chiller units, heat pump units, automotive air conditioning systems, and marine refrigeration and cold storage systems. In this embodiment, the sensor includes a housing 1, an adapter 2, a temperature sensing component 3, and a connector 9. The housing 1 includes a receiving cavity 100 with an opening at its upper end. The adapter 2 includes a base portion 21 and a cylindrical portion 22. The base portion 21 is located in the receiving cavity 100, and the bottom wall 101 of the receiving cavity 100 supports the base portion 22 of the adapter 2. The connector 9 is partially located in the receiving cavity 100. Preferably, the housing 1 is machined from metal material, and the connector 9, adapter 2, and housing 1 are fixedly connected by riveting.

[0028] In this embodiment, the temperature sensing component 3 includes a temperature sensing element 31 and a pin component 32. The pin component 32 includes a connecting segment, which is located between the adapter 2 and the temperature sensing element 31. The connecting segment is fixedly connected to the adapter 2 and electrically connected to the temperature sensing element 31.

[0029] In this embodiment, the pin component 32 includes a conductive sheet 321 and two leads 322. The number of conductive sheets 321 corresponds to the number of leads 322. A portion of the conductive sheet 321 is located in the base portion 21, and the other portion of the conductive sheet 321 extends out of the base portion 21. One end of the lead 322 is connected to the portion of the conductive sheet 321 extending out of the base portion 21, and the other end of the lead 322 is connected to the temperature sensing element 31. The portion of the conductive sheet 321 extending out of the base portion 21 and the lead 322 serve as a connecting segment. The adapter 2 is made of non-metallic material, preferably plastic. The adapter 2 is injection molded to the conductive sheet 321, and the conductive sheet 321 and the lead 322 are electrically connected by welding. Among them, the adapter 2 is an injection molded part, and the pin component 32 adopts a split connection structure. The adapter 2 can be injection molded first with the conductive sheet 321 as an insert. During assembly, the conductive sheet 321 is then soldered to the lead wire 322. In this way, the high temperature heat during the injection molding of the adapter 2 will not affect the performance of the temperature sensing element 31.

[0030] As one embodiment, the pin component 32 does not include the aforementioned conductive sheet 321. The pin component 32 only includes a lead wire, through which electrical connection is achieved. A portion of the lead wire is injection molded to the adapter 2. The end of the portion of the lead wire located outside the adapter 2 is electrically connected to the temperature sensing element 31. The portion of the lead wire extending out of the adapter 2 serves as a connecting segment.

[0031] like Figure 2-9As shown, the sensor also includes an isolation sleeve 4 and a first sealing member 5. The housing 1 includes an installation space 11. The aforementioned cylindrical portion 22 is at least partially located in the installation space 11. The aforementioned temperature sensing element 31 and the aforementioned connecting section are located in the cavity 401 of the isolation sleeve 4. The isolation sleeve 4 is limited to the housing 1 and / or the isolation sleeve 4 is limited to the adapter 2. In this embodiment, the isolation sleeve 4 is specifically limited to the housing 1. The sensor includes a medium channel 110. The isolation sleeve 4 is partially located in the cavity 220 of the cylindrical portion 22. The isolation sleeve 4 has an open end 411 communicating with the cavity 401. The first sealing member 5 is located between the isolation sleeve 4 and the cylindrical portion 22, and the first sealing member 5 seals the cavity 401 and the medium channel 110. Based on this, the sensor places the connection section of the temperature sensing element 31 and the pin component 32 in the cavity 401 of the isolation sleeve 4. The first sealing member 5 isolates the cavity 401 from the medium channel 110 in the radial direction of the isolation sleeve 4, so that the connection section does not come into contact with the fluid being measured. At the same time, it limits the housing 1 and / or limits the isolation sleeve 4 with the adapter 2, thereby improving the sealing reliability of the first sealing member 5, reducing the possibility of short circuit of the pin component 32, and improving the working reliability of the sensor.

[0032] In this embodiment, the first sealing element 5 is an O-ring, and the first sealing element 5 is fitted with the first sleeve body 41 of the isolation sleeve 4. Specifically, in this embodiment, the cylindrical body 22 includes a cylindrical wall 221, which extends longitudinally from the seat body 21 along the sensor. The isolation sleeve 4 includes a limiting groove 412, and the first sealing element 5 is partially located in the limiting groove 412. The limiting groove 412 includes an inner ring wall 4121. In the transverse direction of the sensor, the first sealing element 5 abuts between the cylindrical wall 221 and the inner ring wall 4121, that is, the inner circumference of the first sealing element 5 abuts against the inner ring wall 4121, and the outer circumference of the first sealing element 5 abuts against the cylindrical wall 221. The first sealing element 5 isolates the cavity 401 from the medium channel 110 to ensure that the measured medium cannot enter the cavity 401 of the isolation sleeve 4, so that the connecting section does not contact the measured medium, thereby avoiding the short circuit failure of the pin component 32 and improving the working reliability of the sensor.

[0033] It should be noted that since the adapter 2 is an injection molded part, the longitudinal extension of the cylinder wall 221 along the sensor can facilitate demolding of the cylinder part 22 after injection molding. During the demolding process, the friction force is more uniform, and it is less likely to cause problems such as tearing or deformation due to excessive local stress. This is beneficial to improving production efficiency and product quality. It also makes it easier to control the dimensional accuracy of the cylinder part 22 after molding.

[0034] As a modified embodiment, the installation position of the first seal 5 is understood to be located in the cylindrical part 22. Specifically, the inner wall of the cylindrical part 22 includes a limiting groove, and the first seal 5 is partially located in the limiting groove. In the transverse direction of the sensor, the first seal 5 abuts against the groove wall of the limiting groove and the outer surface of the isolation sleeve 4, thereby ensuring that the measured medium cannot enter the cavity 401 of the isolation sleeve 4, realizing that the connecting section does not contact the measured medium, thereby avoiding the short circuit failure of the pin component 32 and improving the working reliability of the sensor.

[0035] like Figure 4-6 As shown, in this embodiment, the isolation sleeve 4 includes a first body portion 41 and a second body portion 42. In the longitudinal direction of the sensor, the second body portion 42 extends downward from the first body portion 41. The first body portion 41 is at least partially located within the cylindrical cavity 220. The first body portion 41 includes a first protrusion 413 and a second protrusion 414, with a limiting groove 412 between the first protrusion 413 and the second protrusion 414. Based on this, when installing the first seal 5, the installation position of the first seal 5 can be quickly positioned using the first protrusion 413 and the second protrusion 414. Furthermore, the first seal 5 is limited axially by the first protrusion 413 and the second protrusion 414, restricting excessive deformation and displacement of the first seal 5, ensuring that the first seal 5 always remains in the correct position, and maintaining good sealing performance.

[0036] The second protrusion 414 is located below the first protrusion 413. The outer diameter of the second protrusion 414 is larger than the outer diameter of the second sleeve portion 42. In the longitudinal direction of the sensor, the housing 1 supports the second protrusion 41, which facilitates the restriction of the downward displacement of the isolation sleeve 4. At the same time, the cylindrical portion 22 protrudes from the aforementioned seat portion 21 toward the temperature sensing element 31. The seat portion 21 has a limiting surface 211 facing the isolation sleeve 4. In the longitudinal direction of the sensor, the top surface of the first protrusion 413 abuts against the limiting surface 211, or there is a gap between the top surface of the first protrusion 413 and the limiting surface 211, thereby further restricting the axial displacement of the isolation sleeve 4, preventing the isolation sleeve 4 from shifting or loosening, and ensuring the sealing performance of the first sealing member 5.

[0037] The first protrusion 413 and the second protrusion 414 are arranged in a ring around the circumference of the isolation sleeve 4. The isolation sleeve 4 is generally cylindrical. In the transverse direction of the sensor, the outer surfaces of the first protrusion 413 and the second protrusion 414 are in clearance fit with the cylindrical wall 221 of the cylindrical body 22, which can reduce the difficulty of installing the first sleeve body 41 into the cylindrical cavity 220.

[0038] like Figure 4-5As shown, the mounting space 11 includes a first hole 111 and a second hole 112. The inner diameter of the first hole 111 is larger than the inner diameter of the second hole 112. A stepped portion 113 is provided between the first hole 111 and the second hole 112. The stepped surface of the stepped portion 113 faces the cylindrical body portion 22. The second protrusion 414 includes a lower end face 4141, and the stepped surface supports at least a portion of the lower end face 4141. With this configuration, the downward displacement of the isolation sleeve 4 in the sensor can be limited, ensuring the stability and reliability of the isolation sleeve 4.

[0039] In this embodiment, the second body portion 42 is at least partially located in the second hole portion 112. Laterally, a first connecting channel 1120 is formed between the outer surface of the second body portion 42 and the hole wall of the second hole portion 112. This first connecting channel 1120 serves as a partial media channel 110. The difference between the inner diameter of the second hole portion 112 and the outer diameter of the second body portion 42 is X, satisfying 0.2mm ≤ X ≤ 0.5mm. Based on this, the media channel 110 ensures the entry of the media while also filtering impurities with particle sizes exceeding the aforementioned range, thus improving the reliability of the sensor.

[0040] It should be noted that the isolation sleeve 4 can be made of a non-metallic material with insulating properties, while the housing 1 is made of metal. Therefore, the non-metallic isolation sleeve 4 can insulate the pin component 32 from the metal housing 1, further ensuring the electrical performance of the pin component 32, preventing interference, and improving sensing accuracy. The non-metallic material is preferably ceramic, glass, plastic, or PVC (plastic materials have a thermal conductivity of 3.5 or higher), which can improve the temperature response time of the sensor. Of course, the isolation sleeve 4 can also be made of metal, as metal parts are high-efficiency and low-cost when stretched and formed.

[0041] like Figure 4-6 As shown, the thickness of the second body portion 42 is less than at least a portion of the thickness of the first body portion 41, that is, the thickness of the second body portion 42 is less than the thickness of the first protrusion 413, and the thickness of the second body portion 42 is less than the thickness of the second protrusion 414. Since the outer surface of the second body portion 42 is in contact with the medium, the smaller the thickness of the second body portion 42, the faster the temperature sensing element 31 can detect the temperature of the measured medium, reducing the time delay in temperature transmission, ensuring thermal conductivity, and thus enabling the sensor to detect temperature changes more quickly.

[0042] like Figure 3-6As shown, the second body portion 42 has the aforementioned open end 411. Simultaneously, the second body portion 42 includes a protrusion 421, which protrudes from the housing 1. The temperature sensing element 31 is located on the protrusion 421, and the protrusion 421 has a closed end 4211. The protrusion 421 can improve the response time of the temperature sensing element 31 and increase the sensor's sensing rate.

[0043] like Figure 3 , 3a As shown in Figure 7, the sensor in this embodiment further includes a pressure sensing element 7, which is used to sense the pressure value of the measured medium. Preferably, the pressure sensing element 7 is a ceramic pressure sensing element.

[0044] like Figure 5 and 7 As shown in Figure -9, the inner diameter of the first hole 111 is larger than the inner diameter of the second hole 112. The outer surface of the second sleeve 42 and the hole wall of the second hole 112 have the aforementioned first connecting channel 1120. The outer peripheral surface of the cylindrical body 22 and the hole wall of the first hole 111 have the aforementioned second connecting channel 1110. The mounting space 11 includes a groove 114. In the longitudinal direction of the sensor, the groove 114 is recessed downward from the stepped surface of the aforementioned stepped portion 113. The groove 114 is partially located below the cylindrical body 22. The groove 114 connects the first connecting channel 1120 and the second connecting channel 1110. The first connecting channel 1120, the second connecting channel 1110, and the groove 114 serve as the medium channel 110. The adapter 2 includes a pressure sensing channel 214. The lower drain port 2141 of the pressure sensing channel 214 is located above the second connecting channel 1110. The pressure sensing channel 214 is connected to the medium channel 110. Thus, the medium being measured can pass through the first connecting channel 1120 and the second connecting channel 1110 via the groove 114, allowing the medium to flow to the pressure sensing channel 214, thereby realizing the pressure detection of the pressure sensing element 7.

[0045] like Figure 8 As shown, the sensor includes a third seal 8, which is a sealing ring. The housing 1 includes a groove 12, which is provided around the mounting space 11 of the isolation sleeve 4. The groove 12 is recessed from the bottom wall 101 of the cavity toward the temperature sensing element 31. The third seal 8 is partially located in the groove 12 and abuts against the bottom of the groove 12 and the bottom end face of the seat 21. The third seal 8 can seal the gap between the adapter 2 and the housing 1 to ensure that the medium will not leak through the gap when entering the pressure sensing channel 214, thereby improving the reliability of the sensor.

[0046] In this embodiment, the seat portion 21 includes a receiving groove 212, a drainage cavity 213, and the aforementioned pressure sensing channel 214. Figure 7From this perspective, the opening of the receiving groove 212 faces upwards, the pressure sensing element 7 is at least partially located in the receiving groove 212, the drainage cavity 213 is located below the receiving groove 212, and the pressure sensing channel 214 connects the drainage cavity 213 and the medium channel 110. The cross-sectional area of ​​the drainage cavity 213 is larger than the cross-sectional area of ​​the pressure sensing channel 214. This increases the contact area between the measured medium and the ceramic diaphragm below the pressure sensing element 7 through the drainage cavity 213, thereby shortening the time required for the sensor to reach a stable output signal after sensing a pressure change.

[0047] like Figure 7 As shown, the seat portion 21 includes an annular groove 215, which surrounds the drainage cavity 213. The sensor also includes a second seal 6, located in the annular groove 215. Axially, the second seal 6 abuts against the lower surface of the pressure sensing element 7 and the bottom of the annular groove 215. Therefore, the second seal 6 can seal the gap between the adapter seat 2 and the pressure sensing element 7 to prevent media leakage and improve the reliability of the sensor.

[0048] like Figure 5 As shown, the pressure sensing channel 214 is arranged parallel to the medium channel 110, and the longitudinal direction of the pressure sensing channel 214 and the medium channel 110 sensor is vertical. The pressure sensing channel 214 includes the aforementioned lower drain port 2141, which is located between the outer peripheral surface of the cylinder part 22 and the inner wall of the mounting space 11. That is, the lower drain port 2141 is located above the first connecting channel, which can facilitate the rapid conduction of the measured medium, shorten the flow path of the medium, improve the pressure response time of the measured medium, and thus improve the response rate of the sensor.

[0049] Figure 9 This is a cross-sectional schematic diagram of another sensor according to the present invention; Figure 10 for Figure 9 A schematic diagram at point C.

[0050] like Figure 9-10 As shown, the isolation sleeve 4 and the adapter 2 are positioned to limit each other. Specifically, the sensor includes a limiting member a, the cylindrical part 22 includes a side hole 222, and the first sleeve part 41 includes a limiting blind hole 4142. A portion of the limiting member a is located in the side hole 222, and another portion of the limiting member a is located in the limiting blind hole 4142. This arrangement can limit the axial and radial displacement of the isolation sleeve 4, preventing the isolation sleeve 4 from shifting or loosening, and ensuring the sealing performance of the first sealing member 5. At the same time, the isolation sleeve 4 can avoid rotating inside the cylindrical part 22 in the circumferential direction, ensuring the reliability of the seal.

[0051] In this embodiment, the limiting component a is a pin, but it can also be a part with an expansion function, such as an expansion screw or an expansion pin, to ensure the reliability of the seal.

[0052] In the longitudinal direction of the sensor, the limiting blind hole 4142 is closer to the temperature sensing element 31 than the first sealing element 5, which can ensure the sealing effect of the first sealing element 5, further reduce or eliminate the possibility of the measured medium entering the sleeve cavity 401, thereby reducing the risk of short circuit of the pin component 32 and improving the working reliability of the sensor.

[0053] like Figure 10 As shown, in the radial direction of the isolation sleeve 4, the side hole 222 penetrates the cylinder wall 221 of the cylinder part 22 and the outer peripheral surface of the cylinder part 22. The side hole 222 has an enlarged section and a straight section. The straight section is closer to the isolation sleeve 4 than the enlarged section. The enlarged section is trumpet-shaped, which helps to install the limiting member a.

[0054] When the limiting component a is a limiting component without expansion function, such as a pin, for example Figure 10 As shown, the length of the limiting member a is defined as L, and the minimum distance between the cylinder wall 221 of the cylindrical part 22 and the inner wall of the mounting space 11 is defined as M. Regarding M, it should be noted that in this embodiment, in the axial direction of the side hole 222, M is the distance between the cylinder wall 221 and the hole wall of the first hole 111a, thus satisfying L > M. Based on this, the limiting member a can be prevented from disengaging from the limiting blind hole 4142, ensuring the sealing effect of the first sealing member 5 and improving the operational reliability of the sensor.

[0055] like Figure 10 As shown, the installation space 11 includes a first hole 111a and a second hole 112a. The inner diameter of the first hole 111a is larger than the inner diameter of the second hole 112a. A step 113a is provided between the first hole 111a and the second hole 112a. The step surface of the step 113a faces upward. A third connecting channel is provided between the outer surface of the second sleeve part 42 and the hole wall of the second hole 112a. A fourth connecting channel is provided between the outer peripheral surface of the cylinder part 22 and the hole wall of the second hole 112a. A fifth connecting channel is provided between the outer peripheral surface of the cylinder part 22 and the hole wall of the first hole 111a. The fourth connecting channel connects the third connecting channel and the fifth connecting channel. The third connecting channel, the fourth connecting channel and the fifth connecting channel serve as a medium channel 110a. The pressure sensing channel 214 includes the aforementioned lower drain port 2141, which is located between the outer peripheral surface of the cylinder 22 and the inner wall of the mounting space 11. That is, the lower drain port 2141 is located above the fifth connecting channel. In this way, the measured medium flows between the third and fifth connecting channels through the fourth connecting channel, allowing the measured medium to flow to the pressure sensing channel 214 and realize the pressure detection of the pressure sensing element 7.

[0056] It should be noted that, in Figure 3 and Figure 9 The axial limiting method for the isolation sleeve 4 in the illustrated embodiment can be combined with other designs, such as limiting the isolation sleeve 4 to the housing 1 and limiting the isolation sleeve 4 to the adapter 2.

[0057] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0058] The above examples illustrate the principles and implementation methods of this utility model. The descriptions of these embodiments are merely for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the concept of this utility model, and these improvements and modifications also fall within the protection scope of this utility model.

Claims

1. A sensor, characterized by The sensor comprises a shell (1), an adapter seat (2), a temperature sensing component (3), an isolation sleeve (4) and a first sealing element (5), the shell (1) comprises a mounting space (11), the adapter seat (2) comprises a barrel portion (22), the barrel portion (22) is located at least partially in the mounting space (11), the temperature sensing component (3) comprises a temperature sensing element (31) and a pin component (32), the pin component (32) comprises a connecting section, the connecting section is located between the adapter seat (2) and the temperature sensing element (31), the connecting section is fixedly connected with the adapter seat (2), the connecting section is electrically connected with the temperature sensing element (31), the temperature sensing element (31) and the connecting section are located in a sleeve cavity (401) of the isolation sleeve (4); The isolation sleeve (4) is limitingly arranged with the shell (1) and / or the isolation sleeve (4) is limitingly arranged with the adapter seat (2), the sensor comprises a medium channel (110), the isolation sleeve (4) is partially located in a barrel cavity (220) of the barrel portion (22), the isolation sleeve (4) has an opening end (411) in communication with the sleeve cavity (401), the first sealing element (5) is located between the isolation sleeve (4) and the barrel portion (22), and the first sealing element (5) seals the sleeve cavity (401) and the medium channel (110).

2. The sensor of claim 1, wherein, The adapter seat (2) comprises a seat portion (21) and the barrel portion (22), the barrel portion (22) comprises a barrel wall (221), the barrel wall (221) is arranged in a longitudinal direction of the sensor and extends from the seat portion (21), the isolation sleeve (4) comprises a limiting groove (412), the first sealing element (5) is partially located in the limiting groove (412), the limiting groove (412) comprises an inner ring wall (4121), and in a transverse direction of the sensor, the first sealing element (5) is abutted between the barrel wall (221) and the inner ring wall (4121).

3. The sensor of claim 2, wherein, The isolation sleeve (4) comprises a first sleeve portion (41) and a second sleeve portion (42), in a longitudinal direction of the sensor, the second sleeve portion (42) extends downward from the first sleeve portion (41), the first sleeve portion (41) is at least partially located in the barrel cavity (220), the first sleeve portion (41) comprises a first protruding portion (413) and a second protruding portion (414), the limiting groove (412) is arranged between the first protruding portion (413) and the second protruding portion (414), the second protruding portion (414) is located below the first protruding portion (413), an outer diameter of the second protruding portion (414) is greater than an outer diameter of the second sleeve portion (42), and in the longitudinal direction of the sensor, the shell (1) supports the second protruding portion (414).

4. The sensor of claim 3, wherein, The mounting space (11) comprises a first hole part (111) and a second hole part (112), an inner diameter of the first hole part (111) is greater than an inner diameter of the second hole part (112), a stepped part (113) is comprised between the first hole part (111) and the second hole part (112), a stepped surface of the stepped part (113) faces the barrel part (22), the second convex part (414) comprises a lower end surface (4141), and the stepped surface supports at least part of the lower end surface (4141).

5. The sensor of claim 4, wherein, The second sleeve part (42) is at least partially located in the second hole part (112), and a first connecting channel (1120) is formed between an outer surface of the second sleeve part (42) and a hole wall of the second hole part (112) in a transverse direction of the sensor, the first connecting channel (1120) is part of the medium channel (110), a difference between the inner diameter of the second hole part (112) and an outer diameter of the second sleeve part (42) is X, and 0.2mm≤X≤0.5mm is satisfied.

6. The sensor of claim 4, wherein, The second sleeve part (42) is at least partially located in the second hole part (112), and a first connecting channel (1120) is formed between an outer surface of the second sleeve part (42) and a hole wall of the second hole part (112) in a transverse direction of the sensor, the first connecting channel (1120) is part of the medium channel (110), a difference between the inner diameter of the second hole part (112) and an outer diameter of the second sleeve part (42) is X, and 0.2mm≤X≤0.5mm is satisfied.

7. The sensor according to any one of claims 1 to 6, characterized in that The second sleeve part (42) is at least partially located in the second hole part (112), and a first connecting channel (1120) is formed between an outer surface of the second sleeve part (42) and a hole wall of the second hole part (112) in a transverse direction of the sensor, the first connecting channel (1120) is part of the medium channel (110), a difference between the inner diameter of the second hole part (112) and an outer diameter of the second sleeve part (42) is X, and 0.2mm≤X≤0.5mm is satisfied.

8. The sensor of claim 7, wherein, The second sleeve part (42) is at least partially located in the second hole part (112), and a first connecting channel (1120) is formed between an outer surface of the second sleeve part (42) and a hole wall of the second hole part (112) in a transverse direction of the sensor, the first connecting channel (1120) is part of the medium channel (110), a difference between the inner diameter of the second hole part (112) and an outer diameter of the second sleeve part (42) is X, and 0.2mm≤X≤0.5mm is satisfied. The length of the limiting part (a) is defined as L, and the minimum distance between the barrel wall (221) of the barrel part (22) and the inner wall of the mounting space (11) is M, and L>M is satisfied.

9. The sensor of claim 1, wherein, The isolating sleeve (4) is in a cylindrical shape, the isolating sleeve (4) comprises a protruding part (421), the protruding part (421) protrudes from the shell (1), the temperature sensing element (31) is located in the protruding part (421), and the protruding part (421) has a closed end (4211).

10. The sensor according to any one of claims 1-6, wherein, The adapter (2) is made of a non-metal material, the adapter (2) comprises a seat body (21), and the cylindrical body (22) protrudes from the seat body (21) towards the temperature sensing element (31); the seat body (21) comprises a containing groove (212), a drainage cavity (213) and a pressure sensing channel (214); the containing groove (212) has an upward opening; the sensor further comprises a pressure sensing element (7), the pressure sensing element (7) is at least partially located in the containing groove (212); the drainage cavity (213) is located below the containing groove (212); the pressure sensing channel (214) is in communication with the drainage cavity (213) and the medium channel (110); and the cross-sectional area of the drainage cavity (213) is greater than that of the pressure sensing channel (214). The seat body (21) comprises an annular groove (215), the annular groove (215) surrounds the drainage cavity (213); the sensor further comprises a second sealing element (6), the second sealing element (6) is located in the annular groove (215); and in the axial direction of the isolating sleeve (4), the second sealing element (6) abuts between the lower surface of the pressure sensing element (7) and the groove bottom of the annular groove (215).

11. The sensor of claim 10, wherein, The pressure sensing channel (214) is parallel to the medium channel (110), a part of the medium channel (110) is located between the inner wall of the installation space (11) and the outer surface of the isolating sleeve (4), another part of the medium channel (110) is located between the inner wall of the installation space (11) and the outer circumferential surface of the cylindrical body (22), and the pressure sensing channel (214) comprises a lower drainage opening (2141), the lower drainage opening (2141) is located between the outer circumferential surface of the cylindrical body (22) and the inner wall of the installation space (11).

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