An integrated sensor

Abstract

The application discloses an integrated sensor, which comprises a shell, a pressure sensing element and a sensor assembly, an outer wall of a sheath of the sensor assembly is at least partially located in an inner cavity and closely arranged with an inner wall of the shell, a material of the shell is a conductive metal material, a material of the sheath is an insulating material, a base is located in the inner cavity, the pressure sensing element is located in the inner cavity and arranged on a side of the base away from the sheath, the base is clamped and limited with the sheath, the base is provided with a pressure through hole, the outer wall of the sheath is provided with a notch and communicated with the pressure through hole, or the outer wall of the sheath is provided with a gap part and at least part of the pressure through hole is exposed, in the technical scheme, the pressure channel communicated with the pressure sensing element is arranged on the base connected with the temperature sensing element, no additional components are needed to arrange the pressure channel, and the structure of the integrated sensor is simplified.

Description

Technical Field

[0001] The present invention relates to the technical field of sensors, and in particular to an integrated sensor. Background Art

[0002] During vehicle system operation, it's desirable to understand the operating status of the working medium to more effectively control the system's operation. With the continued development of electric vehicles, the demand for controlling the temperature and pressure states of thermal management systems has increased, leading to the increasing use of integrated sensors. Integrated sensors measure both temperature and pressure, utilizing temperature and pressure sensing elements. The temperature sensing element converts the measured temperature signal into an electrical signal, while the pressure sensing element converts the measured pressure signal into an electrical signal. Designing integrated sensors to simplify their structure is a technical challenge. Summary of the Invention

[0003] In order to solve the above technical problems, the present invention provides an integrated sensor.

[0004] The present invention adopts the following technical solution: an integrated sensor, characterized in that it includes a shell, a pressure sensing element and a sensor assembly, the shell includes a connector and a shell, the connector is fixedly connected to one end of the shell, an inner cavity is surrounded by the connector and the shell, the sensor assembly includes a base and a temperature sensing element, the base includes a base and a sheath, the sheath has an inner cavity, the temperature sensing element includes a temperature sensing part and a conductive part, the conductive part is located in the inner cavity, the sheath is located between the shell and the conductive part, a portion of the outer wall of the sheath of the sensor assembly is located in the inner cavity and is tightly arranged with the inner wall of the shell, the material of the shell is a conductive metal material, and the material of the sheath is an insulating material The material is provided, the base is located in the inner cavity, the pressure sensing element is located in the inner cavity and is arranged on the side of the base away from the sheath, the sensor assembly has a pressure channel, and the sensing head of the pressure sensing element is located in the pressure channel; the base and the sheath are clamped and limited; the base is provided with a pressure through hole, the outer wall of the sheath is provided with a notch, the notch is connected to the pressure through hole, or the outer wall of the sheath is provided with a notch, the notch exposes at least part of the pressure through hole; the pressure channel includes a pressure through hole and a notch or notch; in the above technical solution, the pressure channel connected to the pressure sensing element is provided by the base connected to the temperature sensing element, and there is no need to set up the pressure channel with additional components, thereby simplifying the structure of the integrated sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0005] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0006] Figure 1 A schematic cross-sectional view of an integrated sensor provided in one embodiment of the present invention;

[0007] Figure 2 for Figure 1 A schematic cross-sectional view of the sensor assembly in the embodiment shown;

[0008] Figure 3 for Figure 1 A schematic diagram of the three-dimensional structure of the sensor assembly in the embodiment shown;

[0009] Figure 4 for Figure 1 A schematic diagram of a three-dimensional exploded structure of the base and the temperature sensing element in the sensor assembly in the embodiment shown;

[0010] Figure 5 for Figure 4 A schematic diagram of the three-dimensional structure of the sheath in the illustrated embodiment from one perspective;

[0011] Figure 6 for Figure 5 Schematic diagram of the top view structure;

[0012] Figure 7 for Figure 5 Schematic diagram of the structure viewed from above;

[0013] Figure 8 for Figure 1 A schematic diagram of the three-dimensional structure of the base in the illustrated embodiment;

[0014] Figure 9 for Figure 8 A schematic diagram of the three-dimensional structure of the base shown in another angle;

[0015] Figure 10 A three-dimensional combined diagram from one viewing angle of another embodiment of the sensor assembly of the present invention;

[0016] Figure 11 for Figure 10 A schematic diagram of the three-dimensional exploded structure of the sensor assembly shown;

[0017] Figure 12 for Figure 10 A schematic cross-sectional structural diagram of one type of sensor assembly shown;

[0018] Figure 13 This is a schematic diagram of a three-dimensional exploded structure of another embodiment of the sensor assembly of the present invention;

[0019] Figure 14 for Figure 13 A schematic cross-sectional structural diagram of one of the sensor assemblies of the illustrated embodiment;

[0020] Figure 15 FIG1 is a schematic cross-sectional structural diagram of a fourth embodiment of a sensor assembly of the present invention;

[0021] Figure 16 for Figure 15 A cross-sectional view of the sensor assembly from another angle;

[0022] Figure 17 for Figure 15 A three-dimensional combination diagram of the base and the temperature sensing element in the embodiment. DETAILED DESCRIPTION

[0023] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0024] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0026] The sensor assembly provided in this application can be assembled with components in a vehicle air conditioning system, such as a valve or heat exchanger, to detect the temperature parameters of the fluid at the sensor location in the air conditioning system. The integrated sensor provided in this application can be assembled with components in a vehicle air conditioning system, such as a valve or heat exchanger, to detect the temperature and pressure parameters of the fluid at the sensor location in the air conditioning system.

[0027] Please refer to Figures 1 to 17 The sensor assembly provided in this embodiment includes a base 40 and a temperature sensing element 30. The temperature sensing element 30 is connected to the base 40 and is limited by the base 40. The temperature sensing element 30 can sense temperature and convert the temperature signal into an electrical signal.

[0028] The base 40 includes a base 46 and a sheath 43. The base 40 can be a split structure, that is, the sheath 43 and the base 46 are formed separately, which facilitates the installation of the temperature sensing element 30 and the base 46. Alternatively, the base 40 can be a one-piece structure, with the sheath 43 and the base 46 being one-piece, which makes it easier to ensure consistency between the two. Of course, the sheath 43 can also be a split structure or a one-piece structure, which will be described in detail in the following embodiments. The base 46 is the connecting body of the temperature sensing element 30, that is, the base 46 is directly connected to the temperature sensing element 30. The base 46 and the sheath 43 are made of non-conductive materials, which can isolate the conductive portion of the temperature sensing element 30 from the metal shell outside the sensor assembly. This is described in detail in the discussion of integrated sensors.

[0029] The base 40 is described as a split structure, that is, the base 46 and the sheath 43 are formed separately, and the base 46 is fixedly connected to one end of the sheath 43. In the first and second embodiments, as shown in FIG. Figures 1 to 12 The sheath 43 has an inner cavity 42 and a through hole 41, and the through hole 41 is located at the end of the sheath 43 away from the base 46. As far as the sheath 43 is concerned, the inner cavity 42 and the through hole 41 are connected, so that it is convenient for the temperature sensing element 30 to pass through the through hole 41 from the inner cavity 42; part of the temperature sensing portion 31 of the temperature sensing element 30 is located in the through hole 41 and is limited, and the other part of the temperature sensing portion 31 of the temperature sensing element 30 passes through the through hole 41, and can directly contact the fluid without the need for other media conduction, directly detecting the temperature of the fluid, and having higher detection accuracy. In the third and fourth embodiments, as Figures 13 to 17 The sheath 43 has an inner cavity 42 and does not have the relevant structure and function of the through hole 41.

[0030] Specifically, the temperature sensing element 30 includes a temperature sensing portion 31 and a conductive portion 32. The temperature sensing portion 31 is connected to the conductive portion 32. In some embodiments, the temperature sensing portion 31 may be a thermistor, but the type of the temperature sensing portion 31 of the present application is not limited thereto. The temperature sensing element 30 includes at least two conductive portions 32. In this embodiment, the conductive portion 32 includes a pin 321 and a metal connector 322. One end of the pin 321 is electrically connected to the temperature sensing portion 31, and the other end of the pin 321 is fixedly connected and electrically connected to the metal connector 322. The metal connector 322 is connected to the base 46 for position limiting. For example, the metal connector 322 can be inserted and integrally injection molded to form the base 46. At least a portion of the conductive portion 32 is located within the inner cavity of the sheath 43, and the temperature sensing portion 31 at least partially passes through the through hole 41 of the sheath 43, so that the head of the temperature sensing portion 31 is exposed outside the inner cavity and can be in contact with the fluid. At through-hole 41, the gap between temperature-sensing portion 31 and the inner wall of sheath 43 must ensure that the head of temperature-sensing portion 31 can pass through the through-hole and the inner wall of sheath 43 can provide support for the main body of temperature-sensing portion 31, while also reducing the risk of conductive impurities entering the inner cavity through this gap and causing a short circuit between adjacent conductive portions. Common conductive impurities that cause short circuits between adjacent conductive portions include extremely large conductive particles and very long metal wires with a very small diameter. The following embodiments address these two situations.

[0031] In this embodiment, the sheath 43 also includes a buffer portion 434, which forms a buffer cavity 430. The through hole 41 is located between the inner cavity 42 and the buffer cavity 430. When the sensor assembly is working, the fluid can enter the buffer cavity 430, and at least a portion of the main body 311 of the temperature sensing portion 31 is located in the through hole 41, and at least the head 312 of the temperature sensing portion 31 is located in the buffer cavity 430. The gap L0 between the temperature sensing portion 31 and the sheath 43 at the through hole 41 is smaller than the minimum distance L1 between the inner wall of the buffer portion 434 and the outer periphery of the head 312 of the temperature sensing portion, which ensures that the head 312 of the temperature sensing portion 31 can pass through the through hole 41. At the same time, the fluid entering from the buffer cavity 430 and then entering the inner cavity 42 through the through hole 41 is blocked by the buffer portion 434 and the gap between the temperature sensing portion 31 and the sheath 43 at the through hole 41. This is conducive to reducing the entry of large particles of conductive impurities into the inner cavity 42 through the gap, thereby reducing the risk of short circuit between adjacent conductive parts due to large particles of conductive impurities.

[0032] In order to further reduce the risk of short circuit, the gap distance between the temperature sensing portion 31 and the inner side wall of the sheath at the through hole 41 can be set to be less than or equal to the minimum distance between adjacent conductive portions 32, such as Figure 2As shown, the minimum distance between adjacent conductive parts 32 is located at the connection between the temperature sensing part and the conductive part, and the minimum distance is defined as L2. The temperature sensing part 31 and the sheath are clearance-matched at the through hole 41 to prevent conductive impurity particles with a size larger than the minimum distance between adjacent conductive parts from entering the inner cavity, and reduce the conductive impurity particles with a diameter larger than the distance between adjacent conductive parts from contacting the two conductive parts at the same time to cause a short circuit of the temperature sensing element 30, thereby improving the temperature measurement function of the temperature sensing element 30 to be more stable and reliable.

[0033] In another embodiment, in order to reduce the risk of a very small diameter but very long metal wire entering the inner cavity and contacting the adjacent conductive part to cause a short circuit in the temperature sensing element, a convex rib can be provided in the gap between the temperature sensing part and the sheath at the through hole 41 to form a maze structure, thereby ensuring that the head of the temperature sensing part 31 can pass through the through hole 41, and the main body of the temperature sensing part 31 is supported by the sheath 43, thereby reducing the risk of slender conductive impurities entering the inner cavity through the gap to cause a short circuit between adjacent conductive parts.

[0034] The above two implementation modes can be used alone or in combination in a product.

[0035] See also Figures 1-12 The sheath 43 includes a first end 431, a second end 432, an outer wall 433 and a buffer portion 434. The through hole 41 passes through the first end 431. The second end 432 is connected to the base 46. The inner cavity 42 is located between the through hole 41 and the second end 432. The buffer portion 434 includes a protrusion formed from the first end 431. The diameter of the through hole 41 is smaller than the diameter of the inner cavity 42.

[0036] As attached Figure 1 As shown, when the sensor assembly is applied to an integrated sensor, the integrated sensor includes a shell 13, and most of the structure of the base 40 and the temperature sensing element 30 are located in the shell 13. When the shell 13 is made of metal material, the sheath 43 also serves to isolate the conductive part 32 from the shell 13, so that the conductive part 32 of the temperature sensing element 30 cannot contact the metal shell 13 and cause a short circuit.

[0037] The through hole 41 is located at the first end 431. Figure 5As shown, the through hole 41 is located near the center of the first end 431, and the buffer portion 434 is an open structure, having an opening at least in the axial extension direction of the sheath. In one embodiment, the head of the temperature sensing portion 31 passes through the through hole 41, and the outermost end of the head of the temperature sensing portion 31 does not exceed the end face of the buffer portion 434, so that the buffer portion 434 can better protect the temperature sensing portion 31 and reduce the direct erosion of the head of the temperature sensing portion by the fluid. Based on the above embodiment, the buffer portion 434 of the base 40 can be provided with a plurality of through grooves 4351, and the through grooves 4351 are arranged around the through hole 41 to facilitate the fluid to enter the buffer cavity. At the same time, the plurality of columns forming the through grooves 4351 also prevent larger particles from directly hitting the head of the temperature sensing portion 31 and causing damage to the temperature sensing portion 31. In other embodiments, the outermost end of the temperature sensing portion 31 can exceed the end face of the buffer portion 434, which can be selected according to the characteristics of the fluid to be measured and the installation structure.

[0038] In this embodiment, the inner cavity 42 is located on the inner side of the outer wall 433 and between the first end 431 and the second end 432. The base 46 is detachably connected to the second end 432. At least a portion of the conductive portion 32 is accommodated in the inner cavity 42 to protect the conductive portion 32 located in the inner cavity 42. It is worth noting that in order to reduce the passage of conductive impurities, due to the reduction of the gap between the sheath and the temperature sensing portion at the through hole, a pressure difference between the inner and outer cavity 42 where the conductive portion 32 is located will be generated, causing damage to the temperature sensing element 30 under high pressure. Therefore, it is necessary to provide a balancing channel to balance the pressure inside and outside the sheath 43 so that the temperature sensing element 30 will not be damaged by being in a high-pressure environment for a long time. In this embodiment, the balancing channel includes a first section and a second section. The first section is connected to the second section. The first section is connected to the outside of the sheath 43, and the second section is connected to the inner cavity 42. The specific structure of the first section and the second end will be described in detail later in conjunction with the accompanying drawings.

[0039] Based on the above implementation mode, as shown in the attached Figure 1 To the attached Figure 7 As shown, the sheath 43 can be an integrated structure, and the first end portion 431 is provided with a complete through hole 41, the shape of the through hole 41 being adapted to the shape of the temperature sensing portion 31. The inner side of the outer wall 433 forms at least part of the complete inner cavity 42, and the base 46 includes a base body 460 and a first protrusion 461, the first protrusion 461 being fixedly connected to the base body 460, and the sheath 43 is sleeved with the first protrusion 461 so that the first protrusion 461 is in contact with the inner cavity wall of the sheath 43, as shown in the attached figure. Figure 2 As shown, the first protrusion 461 of the base 46 is embedded in the inner cavity 42 of the sheath 43. Figure 8 As shown, the first protrusion 461 is a strip-shaped structure, corresponding to the attached Figure 7 As shown, the shape of the inner cavity 42 is also bar-shaped. Figure 2-Figure 8The first protrusion 461 is formed with a first notch 462, which can be set on the side of the first protrusion 461 along the length direction. The first section of the balance channel includes the first notch 462 and a first gap 4620 between the inner side of the sheath.

[0040] In order to make the connection between the sheath 43 and the base 46 more stable, the second end 432 of the sheath 43 is provided with a mounting groove 435, and the base 46 is provided with a mounting protrusion 463 on the side facing the sheath 43. The mounting protrusion 463 is located between the first protrusion 461 and the base body 460, and the mounting protrusion 463 can be inserted into the mounting groove 435; the first protrusion 461 is set on the mounting protrusion 463 and is embedded in the inner cavity 42 of the sheath 43 after assembly is completed.

[0041] A clamping structure is provided between the mounting notch 435 and the mounting protrusion 463. The clamping structure includes a clamping groove 464 and a clamping block 436. One of the clamping groove 464 and the clamping block 436 is located on the side wall of the second end 432 of the sheath 43 forming the mounting notch 435, and the other is located on the side of the mounting protrusion 463 opposite to the side wall of the mounting notch 435. Figure 4 In the specific example shown, the clamping block 436 is arranged on the side wall of the second end portion 432 of the sheath 43 forming the mounting notch 435, and the clamping groove 464 is located on the side wall of the mounting protrusion 463 perpendicular to the length direction, opposite to the side wall of the mounting notch 435. When the sheath 43 is sleeved with the base 46, as shown in the attached Figure 3 As shown, the block 436 is embedded in the engaging groove 464, so that the sheath 43 and the base 46 will not shake relative to each other. In other embodiments, the positions of the block 436 and the engaging groove 464 can be interchanged.

[0042] like Figure 2 and Figure 3 As shown, after the base 46 and sheath 43 are assembled, the height of the mounting protrusion 463 is less than the depth of the mounting notch 435. The end surface of the base body 460 abuts the end surface of the second end portion 432 of the sheath 43. The top of the mounting protrusion 463 and the sheath 43 form a second gap 4350 at the mounting notch 435. The second section of the balancing channel can be this second gap 4350. When the sensor assembly is in operation, the inner cavity 42 communicates with the first gap 4620, which in turn communicates with the second gap 4350 and further communicates with the exterior of the sheath 43, thereby balancing the pressure inside and outside the sheath and, consequently, the pressure in the temperature sensing portion.

[0043] In one embodiment, the sheath may be a split structure, such as Figure 11The sheath 43 includes a first sheath 44 and a second sheath 45. When closed, the first and second sheaths 44 and 45 have the same shape and basic structure as the integrated sheath described above. Splitting the integrated sheath into the first and second sheaths 44 and 45 facilitates the installation of the temperature sensing element 30. The first sheath 44 has a first half hole 441, and the second sheath 45 has a second half hole 451. When closed, the first and second sheaths 44 and 45 form a cavity 42, and the first and second half holes 441 and 451 form a through hole 41. The connection method between the sheath and the base is the same as described above and will not be repeated here.

[0044] In another embodiment, the difference from the above embodiment is that the connection method between the sheath 43 and the base 46 is different. Figure 10 To the attached Figure 12 As shown, the sheath 43 includes a first sheath 44 and a second sheath 45, the first sheath 44 is provided with a first half hole 441, and the second sheath 45 is provided with a second half hole 451; after being closed, the first sheath 44 and the second sheath 45 form an inner cavity 42 for accommodating at least part of the conductive part 32, and the first half hole 441 and the second half hole 451 form a through hole 41; the base 46 is provided with a second protrusion 467, and the first sheath 44 and the second sheath 45 are respectively located on both sides of the second protrusion 467 and clamp the second protrusion 467; the second protrusion 467 is respectively provided with a first card groove 4671 and a second card groove 4672 on both sides, and the inner side of the outer wall 433 of the first sheath 44 is provided with a first retaining rib 442, which is correspondingly engaged with the first card groove 4671, and the inner side of the outer wall 433 of the second sheath 45 is provided with a second retaining rib 452, which is correspondingly engaged with the second card groove 4672.

[0045] In this embodiment, when the sensor assembly is applied to an integrated sensor, the integrated sensor includes a pressure sensing element and a housing. A cylindrical hole is provided at the lower end of the housing corresponding to the outer wall of the sheath. Figure 10 and attached Figure 12 As shown, the outer wall 433 surfaces of the first sheath 44 and the second sheath 45 both include an arc surface 438 and a notch portion 439. The arc surface 438 fits tightly with the inner wall of the cylindrical hole, and the notch portion 439 is separated from the inner wall of the cylindrical hole. In this embodiment, the notch portion 439 is a plane.

[0046] See Figure 8 and Figure 9The base 46 is provided with a pressure through hole 465, which passes through the base 46 and extends to the second protrusion 467 on the base 46. Part of the pressure through hole 465 enters the inner cavity 42 of the sheath. The outer wall 433 of the first sheath 44 and the second sheath 45 are both provided with a notch 439. The notch 439 of the second sheath 45 exposes at least part of the pressure through hole 465. The notch 439 and the inner wall of the cylindrical hole form a part of the pressure channel. For the convenience of processing, refer to Figure 11 and Figure 12 The gap between pressure hole 465 and second barrier rib 452 is smaller than the minimum distance between adjacent conductive portions 32 in inner cavity 42, reducing the risk of large conductive impurities entering inner cavity 42 and causing a short circuit in temperature sensing element 30. A second notch 468 between base 46 and the inner side of outer wall 433 of sheath 43 forms the gap between pressure hole 465 and second barrier rib 452, serving as part of the balancing channel and maintaining pressure balance inside and outside sheath 43.

[0047] Based on the above-mentioned embodiments, when the sensor assembly is used in an integrated sensor, the integrated sensor includes a pressure sensing element 20 and a circuit module 50. Another portion of the conductive portion 32 extends through the base 46 toward the circuit module 50, is electrically connected to the circuit module 50, and transmits the information detected by the temperature sensing element to the circuit module 50.

[0048] Specifically, as attached Figure 2 To the attached Figure 12 As shown, in some embodiments, the conductive portion 32 includes a pin 321 and a metal connector 322, one end of the pin 321 is connected to the temperature sensing portion 31, and the other end of the pin 321 is connected to the metal connector 322. The pin 321 and part of the metal connector 322 are located in the inner cavity 42 to protect the pin 321 and part of the metal connector 322 therein. Figure 8 and attached Figure 9 As shown, the metal connector 322 includes a first portion 3221 and a second portion 3222, wherein the first portion 3221 is located in the inner cavity 42 and is connected to the pin 321, and the second portion 3222 passes through the base 46 of the base 40 and is electrically connected to the circuit module 50. Figure 9 As shown, the distance between the second portions 3222 of the two conductive portions 32 after passing through the base 46 is large and located on both sides of the drainage groove 466. The connection between the second portion 3222 and the pressure sensor element 20 and the circuit module 50 can refer to the connection method in the relevant art and will not be repeated here.

[0049] See also Figure 1 The integrated sensor includes a housing 10, a pressure sensing element 20, a circuit module 50 and the above-mentioned sensor components.

[0050] The housing 10 mainly plays the role of supporting, limiting and containing; Figure 1 The cross-sectional view of the integrated sensor shown shows that the housing 10 includes a connector 12 and a shell 13, with the connector 12 fixedly connected to one end of the shell 13. The connector 12 can interface with external devices and output the collected temperature and pressure signals. The shell 13 can be metal, providing high structural strength. The shell 13 and the connector 12 cooperate to form an inner cavity 11, in which the circuit module 50, the pressure sensing element 20, the base 40, and part or all of the temperature sensing element 30 are located. The circuit module 50 couples with the pressure sensing element 20 to receive electrical signals from the pressure sensing element 20 and output the signals through the connector 12. The circuit module 50 is positioned on the side of the inner cavity 11 near the connector 12. The base 46 of the sensor assembly is positioned within the inner cavity 11. The outer wall of the sensor assembly's sheath 43 is at least partially positioned within the inner cavity 11 and closely adheres to the lower inner wall of the shell. The pressure sensing element 20 is positioned within the inner cavity 11 on the side of the base 46 away from the sheath 43.

[0051] Specifically, as attached Figure 1 As shown, the inner cavity 11 includes a first inner cavity 111 and a second inner cavity 112. The second inner cavity 112 is located on one side of the pressure sensing element. The circuit module 50 and the pressure sensing element 20 are located in the first inner cavity 111. The side wall of the pressure sensing element 20 is tightly fitted with the inner wall of the connector 12. A first seal 14 is provided between the pressure sensing element 20 and the inner wall of the housing 13 to prevent the medium entering the housing 13 from entering the first inner cavity 111 and contaminating the circuit module 50. The housing 13 also serves as the interface for installing the integrated sensor. Therefore, a second seal 15 is provided on the outer shell of the housing 13. The second seal 15 prevents the medium in the pipeline or valve body from leaking into the external environment through the connection with the equipment.

[0052] As attached Figure 1 As shown, the pressure sensing element 20 detects fluid pressure and can convert the pressure into an electrical signal; the pressure sensing element 20 is located in the inner cavity 11, and the pressure sensing element 20 has a sensing surface 21. The integrated sensor has a pressure channel that can transmit fluid to the surface of the pressure sensing element 20 that senses pressure (for example, an attached pressure channel). Figure 1 At this time, a first sealing member 14 is provided between the sensing surface 21 of the pressure sensor and the housing 13 to prevent the fluid from leaking or being exposed to the first inner cavity 111 .

[0053] There are many specific forms of pressure channels. In one embodiment, as shown in the attached Figure 3 To the attached Figure 9As shown, the base 46 is provided with a pressure through hole 465, and the outer wall 433 of the sheath 43 is provided with a notch 437 in communication with the pressure through hole 465, and the end of the pressure through hole 465 is in abutment with the sensing surface 21 of the pressure sensing element 20. As shown in the accompanying drawings, the pressure sensing element 20 is in abutment with the sensing surface 21 of the pressure sensing element 20. Figure 9 As shown, the surface of the base 46 is further provided with a drainage groove 466 in communication with the pressure through hole 465, so that even if the position of the pressure through hole 465 does not correspond to the position of the pressure sensing element 20, the fluid can be transmitted to the sensing surface 21 of the pressure sensing element 20 through the drainage groove 466. In this embodiment, the notch 437, the pressure through hole 465 and the drainage groove 466 form a pressure channel.

[0054] In another embodiment, the lower end of the second inner cavity 112 is provided with a cylindrical hole at a position corresponding to the outer wall 433 of the sheath 43, the outer wall 433 of the sheath 43 comprises an arc surface 438 and a notch portion 439, the arc surface 438 is in close contact with the inner wall of the cylindrical hole, and the notch portion 439 is arranged separately from the inner wall of the cylindrical hole. The notch portion 439 can be a flat surface for easy processing. As shown in the accompanying drawings, Figure 12 As shown, the base 46 is provided with a pressure through hole 465, and the notch portion 439 exposes at least part of the pressure through hole 465, and the notch portion 439 and the inner wall of the cylindrical hole form part of the pressure channel, and the surface of the base 46 is further provided with a drainage groove 466 in communication with the pressure through hole 465, so that even if the position of the pressure through hole 465 does not correspond to the position of the pressure sensing element 20, the fluid can be transmitted to the sensing surface 21 of the pressure sensing element 20 through the drainage groove 466. The fluid flows into the pressure through hole 465 through the notch portion 439, and is then transmitted to the sensing surface 21 of the pressure sensing element 20.

[0055] In some embodiments, as shown in the accompanying drawings, Figure 1 As shown, the second end portion 432 of the sheath 43 is completely placed inside the second inner cavity 112, and the first end portion 431 can be located outside the cylindrical hole at the lower end of the second inner cavity 112, and the temperature sensing portion 31 of the temperature sensing element 30 is also located outside the cylindrical hole of the shell 13, directly in contact with the fluid, for more accurate detection. In other embodiments, the second end portion 432 of the sheath 43 can not protrude beyond the lower end surface of the shell 13, and at the same time, the temperature sensing portion 31 does not protrude beyond the lower end surface of the shell 13, but the outer surface of the temperature sensing portion 31 is exposed to the fluid for direct detection of the temperature of the fluid.

[0056] In some embodiments, as shown in the accompanying drawings, Figure 5As shown, the outer wall 433 of the sheath 43 is cylindrical in shape and is adapted to the cylindrical hole at the lower end of the second inner cavity 112. The outer wall 433 of the sheath 43 can be tightly arranged with the inner wall of the cylindrical hole of the shell 13 as a whole, so that the sheath 43 is stably installed in the cylindrical hole. The pressure channel includes a notch 437 arranged on the outer wall 433 and a pressure through hole 465 on the base 46. The fluid is transmitted to the sensing surface 21 of the pressure sensing element 20 through the pressure channel. The outer wall 433 separates the conductive part 32 in the inner cavity 42 and the fluid in the pressure channel.

[0057] In other embodiments, as shown in the attached Figure 1 As shown, the outer wall 433 of the sheath 43 is tightly arranged with the inner wall of the cylindrical hole at the lower end of the shell 13. In this case, the outer wall 433 of the sheath 43 may be provided with a long strip, which fits tightly with the inner wall of the cylindrical hole, and the outer wall 433 of the sheath 43 is loosely fitted with the cylindrical hole; or, the outer wall 433 of the sheath 43 includes an arc surface 438 and a notch 439, the arc surface 438 fits tightly with the inner wall of the cylindrical hole, and the notch 439 is separated from the inner wall of the cylindrical hole. Figure 10 As shown, the notch portion 439 is a plane.

[0058] In other embodiments, in order to prevent adjacent conductive parts of the temperature sensing element from short-circuiting during operation, in addition to providing a gap to reduce the entry of conductive impurities into the inner cavity where the conductive part is located, an isolation part can also be provided. The isolation part is located between adjacent conductive parts, and the isolation part extends from the contact surface between the temperature sensing part and the conductive part to the connection surface between the base and the metal connector. In this way, the conductive parts are completely located on different sides of the isolation part. The conductive parts are isolated by the isolation part, so that the conductive parts are located in different areas, thereby preventing adjacent conductive parts of the temperature sensing element from being short-circuited by conductive medium particles during operation. Specific embodiments are described in detail below.

[0059] like Figure 13-14 The sheath 43 is a split structure. The sheath 43 includes a first sheath 44 and a second sheath 45. The first sheath 44 and the second sheath 45 are closed to form an inner cavity 42. The sheath 43 is formed with an isolation portion 47. The isolation portion 47 protrudes from the inner side of the first sheath 44 or the second sheath 45 formed integrally therewith. After the first sheath 44 and the second sheath 45 are closed, the isolation portion 47 is located between adjacent conductive portions 32. The adjacent conductive portions 32 are isolated by the isolation portion 47, so that the adjacent conductive portions 32 are located in different areas, such as Figure 14As shown, one conductive portion 32 is located in the left area of ​​the isolation portion 47, and the other conductive portion 32 is located in the right area of ​​the isolation portion, and there is no portion in the inner cavity where the conductive portion 32 is directly opposite to each other and is not isolated by the isolation portion; the pins 321 and the metal connector 322 of the conductive portion 32 are projected onto the isolation portion 47, and the projection of the conductive portion 32 is located within the area surrounded by the edge of the isolation portion 47, and there is no portion in the inner cavity where the conductive portion 32 is directly opposite to each other and is not isolated by the isolation portion 47; the adjacent conductive portions 32 are isolated by the isolation portion 47, so that the conductive portions are located in different areas, thereby preventing the adjacent conductive portions 32 of the temperature sensing element 30 from being short-circuited by the conductive medium particles during operation.

[0060] Of course, the isolation part 47 may also include a first isolation part and a second isolation part. The first isolation part is integrally formed with the first sheath 44, and the first isolation part protrudes from the inner side surface of the first sheath 44. The second isolation part is integrally formed with the second sheath 45, and the second isolation part protrudes from the inner side surface of the second sheath 45. The first isolation part and the second isolation part are in close contact after the first sheath 44 and the second sheath 45 are closed. The pins and metal connectors of the conductive part 32 are projected onto the isolation part 47, and the projection of the conductive part 32 is located within the area surrounded by the edge of the isolation part 47; the conductive part is isolated by the isolation part 47, so that the conductive part 32 is located in different areas.

[0061] The above embodiment does not require any limitation on the through hole, and does not require an independent design of a pressure balancing channel, so the structure is simpler and the installation is more convenient.

[0062] like Figure 15-17 ,and Figure 11 Compared with the embodiment, the isolation part 47 is formed integrally with the base 46. The isolation part 47 is located between adjacent metal connectors 322 and extends to the contact surface of the sensing part 31 with the pin. The metal connector 322 is injection-molded and fixed to the base 46. One of the adjacent conductive parts 32 is close to the first side 471 of the isolation part 47, and the other adjacent conductive part 32 is close to the second side 472 of the isolation part 47. The first side 471 and the second side 472 are arranged in parallel. The width of the first side 471 and the second side 472 are both greater than the maximum width of the adjacent metal connector 322 or the pin 321; the conductive part is projected onto the first side 471 and the second side 472 of the isolation part 47, and the projection of the conductive part 32 is located within the area surrounded by the edges of the first side 471 and the second side 472. The adjacent conductive parts 32 are isolated by the isolation part 47, so that the conductive parts 32 are located in different areas, reducing the risk of accidental short circuit between two adjacent conductive parts 32; this embodiment does not require limitation of the through hole, does not require independent design of the pressure balance channel, and has a simpler structure and is more convenient to install.

[0063] The above embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and replacements made by technicians in this field on the basis of the present invention fall within the scope of protection required by the present invention.

Claims

1. An integrated sensor, characterized in that: The invention comprises a shell, a pressure sensing element and a sensor assembly, wherein the shell comprises a connector and a shell, the connector is fixedly connected to one end of the shell, an inner cavity is surrounded by the connector and the shell, the sensor assembly comprises a base and a temperature sensing element, the base comprises a base and a sheath, the sheath has an inner cavity, the temperature sensing element comprises a temperature sensing part and a conductive part, the conductive part is located in the inner cavity, the sheath is located between the shell and the conductive part, a part of the outer wall of the sheath of the sensor assembly is located in the inner cavity and is tightly arranged with the inner wall of the shell, the shell is made of conductive metal material, the sheath is made of insulating material, the base is located in the inner cavity, and the The pressure sensing element is located in the inner cavity and is arranged on the side of the base away from the sheath. The sensor assembly has a pressure channel, and the sensing head of the pressure sensing element is located in the pressure channel; the base and the sheath are clamped and limited; the base is provided with a pressure through hole, and the outer wall of the sheath is provided with a notch, and the notch is connected to the pressure through hole, or the outer wall of the sheath is provided with a notch, and the notch exposes at least part of the pressure through hole; the pressure channel includes a pressure through hole and a notch or notch; the sheath has a through hole, at least part of the temperature sensing part is located in the through hole, and the gap between the temperature sensing part and the through hole at the through hole is less than or equal to the minimum gap between adjacent conductive parts.

2. The integrated sensor according to claim 1, characterized in that The temperature sensing portion includes a main body and a head. The main body of the temperature sensing portion is located in the through hole and is loosely fitted with the sheath. The head of the temperature sensing portion passes through the through hole of the sheath.

3. The integrated sensor according to claim 2, characterized in that The base has a balancing channel, wherein the balancing channel includes a first section and a second section, the first section is communicated with the second section, the first section is communicated with the outside of the sheath, and the second section is communicated with the inner cavity, the base includes a base body and a first protrusion, the first protrusion is fixedly connected to the base body, the first protrusion extends into the inner cavity, the first protrusion is formed with a first notch, the first section of the balancing channel is a first gap between the first notch and the inner side of the sheath, the base is provided with a mounting protrusion on a side facing the sheath, the mounting protrusion is located between the first protrusion and the base body, the second end of the sheath is provided with a mounting notch, the mounting protrusion is inserted into the mounting notch, the height of the mounting protrusion is less than the depth of the mounting notch, the end surface of the base body abuts the end surface of the second end of the sheath, the top of the mounting protrusion and the sheath form a second gap at the mounting notch, and the second section of the balancing channel is the second gap.

4. The integrated sensor according to claim 3, characterized in that The sheath includes a first sheath and a second sheath, the first sheath is provided with a first half hole, and the second sheath is provided with a second half hole; the first sheath and the second sheath after being closed form the inner cavity, and the first half hole and the second half hole form the through hole; the base is provided with a second protrusion, the first sheath and the second sheath are respectively located on both sides of the second protrusion, and clamp the second protrusion; the two sides of the second protrusion are respectively provided with a first card slot and a second card slot, the inner side of the outer wall of the first sheath is provided with a first retaining rib, which is correspondingly engaged with the first card slot, and the inner side of the outer wall of the second sheath is provided with a second retaining rib, which is correspondingly engaged with the second card slot.

5. The integrated sensor according to claim 1, characterized in that The base has an isolation portion, the isolation portion is located between adjacent conductive portions, the isolation portion extends from the contact surface of the temperature sensing portion and the conductive portion to the connection surface of the base and the metal connecting portion; the isolation portion and the base are integrally formed, the isolation portion is located between adjacent metal connecting portions, the metal connecting portion and the base are injection-molded and fixed, one of the adjacent conductive portions is in close contact with the first side surface of the isolation portion, and the other adjacent conductive portion is in close contact with the second side surface of the isolation portion, and the first side surface and the second side surface are arranged in parallel. The conductive portion is projected onto the first side surface and the second side surface, and the projection is located within an area surrounded by edges of the first side surface and the second side surface.

6. The integrated sensor according to claim 1, characterized in that The sheath includes a first sheath and a second sheath, and the first sheath and the second sheath are closed to form the inner cavity. The isolation part includes a first isolation part and a second isolation part. The first isolation part is integrally formed with the first sheath, and the first isolation part protrudes from the inner side surface of the first sheath. The second isolation part is integrally formed with the second sheath, and the second isolation part protrudes from the inner side surface of the second sheath. The first isolation part and the second isolation part are in close contact to form the isolation part after the first sheath and the second sheath are closed. The conductive part and the metal conductive part are projected onto the isolation part, and the projection is located within the area surrounded by the edge of the isolation part.

7. The integrated sensor according to claim 1, characterized in that The sheath includes a first sheath and a second sheath, and the first sheath and the second sheath are closed to form the inner cavity. The isolation part is integrally formed with the first sheath or the second sheath, and the isolation part protrudes from the inner side surface of the first sheath or the second sheath integrally formed therewith. The conductive part and the metal conductive part are projected onto the isolation part, and the projection is located within the area surrounded by the edge of the isolation part.

8. The integrated sensor according to any one of claims 5 to 7, characterized in that: The base is provided with a second protrusion, and the first sheath and the second sheath are respectively located on both sides of the second protrusion and clamp the second protrusion; the second protrusion is respectively provided with a first card slot and a second card slot, the inner side of the outer wall of the first sheath is provided with a first retaining rib, which is correspondingly engaged with the first card slot, and the inner side of the outer wall of the second sheath is provided with a second retaining rib, which is correspondingly engaged with the second card slot.

9. The integrated sensor according to claim 1, characterized in that The conductive part includes a metal connector and a pin, one end of the pin is connected to the temperature sensing part, and the other end is connected to the metal connector; the metal connector includes a first part and a second part that are connected, the first part is located in the inner cavity and connected to the pin, and the second part passes through the base.

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