Temperature and pressure detection sensor device and method of manufacturing the same

Abstract

The application provides a temperature and pressure detection sensor device and a preparation method thereof. The preparation method inserts a connector pin into a sensor electrical connection end for positioning before potting, and then pulls out the pin before potting. After the internal potting forms an epoxy resin, the pin is inserted again and the shell is roll-pressed and sealed. A two-step insertion and sealing process is realized to achieve accurate assembly and reliable sealing of the temperature and pressure sensor components, plastic parts, shell and connector. The filled sealant realizes the packaging and sealing of the internal lead channel and sensing element of the temperature and pressure sensor, effectively isolating the leakage path of the measured medium through the internal gap of the flexible connection part and the slot; the ring-shaped sealant realizes the external interface sealing between the shell and the connector, preventing the medium from seeping from the joint between the outer side wall of the shell and the connector. The double-sealing structure solves the problems of high leakage risk, additional sealing process, complex process control and high defect rate caused by the difficulty in sealing the lead channel.

Description

Technical Field

[0001] This application relates to the field of intelligent sensing technology, specifically to a temperature and pressure detection sensor device and its preparation method, used to detect the temperature and pressure of pipelines such as refrigeration, thermal management, and refrigerant systems in fuel vehicles and new energy vehicles. Background Technology

[0002] Currently, ceramic-based integrated temperature and pressure sensors are widely used in the industry to simultaneously detect the temperature and pressure in pipelines of refrigeration, thermal management, and refrigerant systems in both gasoline and new energy vehicles. However, existing ceramic-based integrated temperature and pressure sensors still face the following technical challenges in practical applications: Existing ceramic-based integrated temperature and pressure sensors typically employ NTC thermistors as the temperature sensing element, encapsulating them together with the pressure sensing element. In the design of the signal pins, the shared or adjacent lead channels are often difficult to seal completely, posing a potential risk of refrigerant or medium pressure leakage. To avoid leakage, additional sealing processes are required in the manufacturing process, significantly increasing the difficulty of process control and leading to higher defect and scrap rates during process inspection, further increasing the overall product cost. Summary of the Invention

[0003] In view of this, embodiments of this application provide a method for fabricating a temperature and pressure detection sensor device, comprising: A temperature and pressure sensor is provided, wherein the temperature and pressure sensor includes an electrical connection terminal, a temperature and pressure sensing terminal, and a flexible connection portion electrically connecting the electrical connection terminal and the temperature and pressure sensing terminal; a temperature sensing module and a pressure sensing module are disposed on the front and back surfaces of the temperature and pressure sensing terminal; Provide a connector and insert the connector pins into the electrical connection socket of the electrical connection end; A plastic part is provided, wherein the plastic part includes: a base, at least one slot extending in the base along a first direction, and at least one support extending in the first direction; The first surface of the temperature and pressure sensing end is fixedly connected to the outer wall of the base; the flexible connection part is located in at least one of the slots and is spaced apart from at least one of the supports; A housing is provided, and the second surface of the temperature and pressure sensing end is fixedly connected to the support platform of the housing; the plastic part is located inside the housing, and the support platform, the temperature and pressure sensing end, and the base are stacked sequentially in the first direction; The connector pins are pulled out of the electrical connection sockets of the electrical connection end, and the temperature and pressure sensor, the plastic part and the housing are potted to form a filling sealant inside the housing; Insert the connector pins into the electrical connection socket of the electrical connection end again, roll and seal the outer wall of the housing to form a ring-shaped sealant to fix the outer wall to the outside of the connector, thereby achieving a fixed and sealed connection between the temperature and pressure sensor, the plastic part, the housing and the connector.

[0004] In one embodiment, the second surface of the temperature and pressure sensing end is fixedly connected to the support platform of the housing by a first adhesive. The first surface of the temperature and pressure sensing end is fixedly connected to the outer wall of the base by a second adhesive. Both the first adhesive and the second adhesive are double-sided adhesives with a hollow center; the hollow center area of ​​the first adhesive and the second adhesive exposes the pressure-sensitive electrode or temperature-sensitive electrode of the temperature and pressure sensing end.

[0005] In one embodiment, the connector includes: a connector base and at least one limiting boss fixedly connected thereto; When the temperature and pressure sensor, the plastic part, the housing and the connector are fixedly and sealed together, at least one of the limiting bosses is formed in at least one of the slots, and the side wall of at least one of the limiting bosses is in contact with the side wall of at least one of the supports.

[0006] In one embodiment, the first surface of the temperature and pressure sensing end is the pressure sensing module, and / or the second surface of the temperature and pressure sensing end is the pressure sensing module.

[0007] In one embodiment, the step of potting the temperature and pressure sensor, the plastic part, and the housing includes: After removing the connector pins, the housing is placed in a vacuum environment, and liquid epoxy resin is injected from the top opening of the housing to fill the temperature and pressure sensing end, the interior of the housing, the base, part of the slot, and part of the support. The component after epoxy resin injection is heated and cured to fully harden the filler sealant.

[0008] In one embodiment, the annular sealant is a UV-curable or thermosetting adhesive, and the specific steps for rolling and sealing the outer wall of the housing include: After re-inserting the connector pins into the electrical connection socket of the electrical connection end, the housing is rotated about its axis while sealant is applied to the joint between the outer wall and the connector using a dispensing needle. During or after coating, radial pressure is applied to the outer wall using a rolling tool, causing slight plastic deformation of the outer wall to form an interference fit with the connector, while the annular sealant fills the tiny gap between them. The applied ring-shaped sealant is cured to achieve a fixed and sealed connection between the housing and the connector.

[0009] This application also provides a temperature and pressure detection sensor device, including: shell; A plastic part is disposed within the housing, the plastic part including a base, at least one slot extending along a first direction and disposed in the base, and at least one support extending along the first direction; A temperature and pressure sensor includes an electrical connection terminal, a temperature and pressure sensing terminal, and a flexible connection portion electrically connecting the electrical connection terminal and the temperature and pressure sensing terminal; the temperature and pressure sensing terminal has a first surface and a second surface opposite to each other, and a temperature sensing module and a pressure sensing module are respectively disposed on the two surfaces; the first surface of the temperature and pressure sensing terminal is fixedly connected to the outer wall of the base, and the second surface of the temperature and pressure sensing terminal is fixedly connected to the support platform of the housing, so that the support platform, the temperature and pressure sensing terminal, and the base are stacked sequentially in the first direction; the flexible connection portion is located in at least one of the slots and is spaced apart from at least one of the supports; A connector, wherein its pins are inserted into the electrical connection socket of the electrical connection terminal and are electrically connected to the electrical connection terminal; A sealant is applied to the bearing wall of the housing, at least covering the temperature and pressure sensing end, a portion of the flexible connection, a portion of the slot, and a portion of the support; and A ring-shaped sealant is applied between the outer wall of the housing and the connector to press the outer wall of the housing onto the outside of the connector, thereby achieving a fixed and sealed connection between the housing and the connector.

[0010] In one embodiment, the second surface of the temperature and pressure sensing end is fixedly connected to the support platform of the housing by a first adhesive; the first surface of the temperature and pressure sensing end is fixedly connected to the outer wall of the base by a second adhesive; both the first adhesive and the second adhesive are double-sided adhesives with a hollow center; the hollow center area of ​​the first adhesive and the second adhesive exposes the area where the pressure-sensitive electrode or temperature-sensitive electrode of the temperature and pressure sensing end is located.

[0011] In one embodiment, the connector includes: a connector base and at least one limiting boss fixedly connected thereto; at least one limiting boss is located in at least one slot, and the side wall surface of at least one limiting boss contacts the side wall surface of at least one support.

[0012] In one embodiment, the first surface of the temperature and pressure sensing end is the pressure sensing module, and / or the second surface of the temperature and pressure sensing end is the pressure sensing module.

[0013] In one embodiment, the filling sealant is epoxy resin, which fills the space defined by the temperature and pressure sensing end, the inside of the housing, the base, part of the slot and part of the support, and is cured by heating.

[0014] In one embodiment, the annular sealant is a UV-curable or thermosetting adhesive, which fills the tiny gap between the outer wall of the housing and the connector. The outer wall has a slight plastic deformation to form an interference fit with the connector.

[0015] 1. In this embodiment, on the one hand, by inserting the connector pin into the electrical connection end of the sensor for positioning before potting, pulling it out before potting, and then inserting it again after the internal epoxy resin is formed and rolling the shell for sealing, the precise assembly and reliable sealing of the various components of the temperature and pressure sensor, including the sensor, plastic parts, shell and connector, are achieved.

[0016] On the other hand, by filling the internal lead channels and sensing elements of the temperature and pressure sensor with sealant, the leakage path of the measured medium through internal gaps such as flexible connections and slots can be effectively isolated. The external interface between the housing and the connector is sealed using ring-shaped sealant, preventing the medium from seeping in from the joint between the outer wall of the housing and the connector. This dual-sealing structure, combining internal and external sealing, fundamentally solves the problems of high leakage risk, the need for additional sealing processes, complex process control, and high defect rates caused by the difficulty in sealing the lead channels in the background technology. While ensuring the accuracy of temperature and pressure detection, it significantly improves the sealing reliability and production yield of the product, and effectively reduces the overall manufacturing cost.

[0017] 2. In this embodiment, the plastic part adopts a cylindrical hollow structure with a bottom surface and is provided with a slot. At the same time, the connector is provided with a limiting boss to form a snap-fit ​​with the slot. This structural design allows the flexible connection part to pass smoothly through the slot without being squeezed and deformed. Meanwhile, the snap-fit ​​between the limiting boss and the slot provides reliable circumferential limiting and radial support for the plastic part and the connector, effectively preventing the temperature and pressure sensor from shifting or twisting during assembly, and ensuring the positional stability and long-term working reliability of the temperature and pressure sensor in the housing.

[0018] 3. In this embodiment, double-sided adhesive tape (first adhesive and second adhesive) with a central cutout is used to fix the temperature and pressure sensing end to the bottom surface of the inner wall of the housing and to the outer wall of the plastic base, respectively. The cutout area precisely exposes the pressure-sensitive electrode or temperature-sensitive electrode, which not only ensures reliable adhesion and fixation of the sensing end to the adjacent components on both sides, but also avoids the adhesive covering the sensing area and affecting the medium contact and signal acquisition. At the same time, the overall thickness of the temperature and pressure sensor is controlled within 0.15mm-0.3mm, which effectively reduces the heat conduction path and pressure transmission loss, thereby ensuring the detection sensitivity of temperature and pressure.

[0019] 4. In this embodiment, the liquid or gas entering through the inlet and channel is physically isolated by filling the metal shell with sealant, so that the measured medium comes into contact with the temperature sensing module first and then with the pressure sensing module. This structural design not only uses the sealant to protect the internal electrical connections of the temperature and pressure sensors from corrosion by the medium, but also ensures that the temperature sensing module can respond to the temperature change of the medium first through the orderly flow path of the medium, avoiding the disturbance of the temperature field by the pressure sensing module, and improving the accuracy and response speed of dual-parameter detection.

[0020] 5. In this embodiment of the application, after the connector is inserted into the plastic part, the outer edge of the metal shell is rolled and fixed and epoxy resin is applied to form a ring sealant, which completely seals the joint between the shell and the connector. This external sealing structure (ring sealant) can effectively prevent moisture, dust or corrosive gases in the external environment from entering the product from the mating gap between the shell and the connector, protecting the electrical contact points inside the connector from oxidation and corrosion, thereby significantly improving the long-term reliability and service life of the product under harsh working conditions.

[0021] 6. In this embodiment, the connector is provided with a limiting boss, which is located in the groove of the plastic part after assembly and forms contact with the side wall of the support. Through the staggered contact between the limiting boss and the support, the connector and the plastic part are fixed in both the circumferential and radial directions. Compared with a single plug structure, this multi-point contact staggered engagement method can more evenly distribute external vibration and impact loads, prevent the connector from loosening or rotating relative to the plastic part, and significantly enhance the stability and vibration resistance of the overall structure. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is an exploded view of the temperature and pressure detection sensor device provided in the embodiments of this application; Figure 2 This is a cross-sectional view of the temperature and pressure detection sensor device provided in the embodiments of this application along the first section line; Figure 3 This is a cross-sectional view of the temperature and pressure detection sensor device provided in the embodiments of this application along the second section line; Figure 4 This is a cross-sectional view of the actual structure of the temperature and pressure detection sensor device provided in the embodiments of this application; Figure 5 This is a physical diagram of the temperature and pressure sensor installed in the embodiments of this application; Figure 6 This is a physical diagram showing the installation state of the temperature and pressure sensor and the plastic part provided in the embodiments of this application; Figure 7 This is a physical diagram of the overall structure of the temperature and pressure detection sensor device provided in the embodiments of this application.

[0024] Explanation of reference numerals in the attached figures: Temperature and pressure detection sensor device 1000: Casing 100: First end 101, Second end 102, Transition fillet 103, Threaded tail 104, Inlet 105, Channel 106, Support platform 107, Support wall 108; Plastic part 200: slot 201, support 202, base 203; Temperature and pressure sensor 300: First adhesive 310, second adhesive 311, electrical connection terminal 320, flexible connection part 330, temperature and pressure sensing terminal 340; Connector 400: Marking protrusion 401, connector base 402, limiting boss 403, electrical connection plug 410, pin head 411, pin 412; Circular sealant 500, filler sealant 501.

[0025] 600 sealing ring. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0027] This application provides a method for fabricating a temperature and pressure detection sensor device, used to achieve, for example... Figure 1 The temperature and pressure detection sensor device 1000 shown is packaged. The fabrication method of the temperature and pressure detection sensor device includes: S10, a temperature and pressure sensor 300 is provided, wherein the temperature and pressure sensor 300 includes an electrical connection terminal 320, a temperature and pressure sensing terminal 340, and a flexible connection portion 330 electrically connecting the electrical connection terminal 320 and the temperature and pressure sensing terminal 340. The temperature sensing module and the pressure sensing module are disposed on the front and back surfaces of the temperature and pressure sensing terminal 340.

[0028] S20 provides a connector 400 and inserts the pins of the connector 400 into the electrical connection socket of the electrical connection terminal 320.

[0029] S30, a plastic part 200 is provided, wherein the plastic part 200 includes: a base 203, at least one slot 201 extending in the base 203 along a first direction, and at least one support 202 extending in the first direction.

[0030] S40, the first surface of the temperature and pressure sensing end 340 is fixedly connected to the outer wall of the base 203. The flexible connecting part 330 is located in at least one slot 201 and is spaced apart from at least one support 202. The first surface of the temperature and pressure sensing end 340 can be configured as a pressure sensing module or a temperature and pressure sensing module. The first surface of the temperature and pressure sensing end 340 can be fixedly connected to the outer wall of the base 203 by means of double-sided adhesive.

[0031] S50, a housing 100 is provided, and the second surface of the temperature and pressure sensing terminal 340 is fixedly connected to the support platform 107 of the housing 100. A plastic part 200 is located inside the housing 100, and the support platform 107, the temperature and pressure sensing terminal 340, and the base 203 of the housing 100 are sequentially stacked in the first direction. The housing 100 can be a metal housing. The second surface of the temperature and pressure sensing terminal 340 can be fixedly connected to the support platform 107 of the housing 100 by means of double-sided adhesive.

[0032] S60, the pins of connector 400 are pulled out from the electrical connection socket of electrical connection terminal 320, and the temperature and pressure sensor 300, plastic part 200 and housing 100 are potted to form a filling sealant 501 inside the housing 100.

[0033] S70, the pins of connector 400 are inserted into the electrical connection socket of electrical connection terminal 320 again, and the second end 102 of housing 100 is rolled and sealed to form a ring sealant 500. The second end 102 is fixedly pressed to the outside of connector 400, so as to achieve a fixed and sealed connection between temperature and pressure sensor 300, plastic part 200, housing 100 and connector 400.

[0034] In this embodiment, on the one hand, by inserting the connector pin into the sensor electrical connection end for positioning before potting, pulling it out before potting, and then inserting it again after the internal epoxy resin is formed and rolling the shell for sealing, the precise assembly and reliable sealing of the various components of the temperature and pressure sensor, including the sensor, plastic parts, shell and connector, are achieved.

[0035] On the other hand, by filling with sealant 501, the internal lead channels and sensing elements of the temperature and pressure sensor 300 are encapsulated and sealed, effectively isolating the path of leakage of the measured medium through the flexible connection 330, the slot 201, and other internal gaps. The annular sealant 500 seals the external interface between the housing 100 and the connector 400, preventing the medium from seeping in from the joint between the second end 102 of the housing and the connector 400. This dual sealing structure, combining internal and external sealing, fundamentally solves the problems of high leakage risk, the need for additional sealing processes, complex process control, and high defect rates caused by the difficulty in sealing the lead channels in the prior art. While ensuring the accuracy of temperature and pressure detection, it significantly improves the sealing reliability and production yield of the product, and effectively reduces the overall manufacturing cost.

[0036] In one embodiment, such as Figure 1 and Figure 6 As shown, the housing 100 includes a first end 101, a second end 102, a fillet 103, a threaded tail portion 104, and an inlet 105 (as shown). Figure 1(as shown), channel 106, support platform 107, support wall 108 (as shown) Figure 2 (As shown). The first end 101 is a threaded rod, which is the connecting thread for connection to the outside. The second end 102 is the outer wall of the housing, and the outer wall that connects to the temperature and pressure sensor 300. The fillet 103 is used to reduce stress concentration and improve fatigue strength. The sealing ring 600 is fitted onto the threaded end 104. The inlet 105 and the channel 106 are used to realize media transmission. The support platform 107 is used to support the temperature and pressure sensor 300 and the plastic part 200. The support wall 108 is filled with sealant 501.

[0037] The plastic part 200 is a hollow, cylindrical shape with a bottom surface and slots 201 on its side walls to facilitate the passage of the flexible connection part 330 of the temperature and pressure sensor 300. For example... Figure 1 , Figure 3 and Figure 4 As shown, the connector 400 has a limiting boss 403, which engages with the slot 201 of the plastic part 200; the plastic part 200 provides support, ensuring the stability of the temperature and pressure sensor 300 structure. Figure 2 and Figure 3 As shown, both the annular sealant 500 and the filler sealant 501 serve a sealing and fixing function, but they fix and seal different objects. The connector 400 also includes: a connecting body (unlabeled), a marking protrusion 401 on the connecting body, and an electrical connection plug 410. The electrical connection plug 410 includes: a plug tip 411 and a plug 412. The connecting body, connector base 402, limiting boss 403, and electrical connection plug 410 can be integrally injection molded.

[0038] In this embodiment, the plastic part 200 adopts a cylindrical hollow structure with a bottom surface and is provided with a slot 201. At the same time, the connector 400 is provided with a limiting boss 403 to form a snap-fit ​​with the slot 201. This structural design allows the flexible connecting part 330 to pass smoothly through the slot 201 without being squeezed and deformed. Meanwhile, the snap-fit ​​between the limiting boss 403 and the slot 201 provides reliable circumferential limiting and radial support for the plastic part 200 and the connector 400, effectively preventing the temperature and pressure sensor 300 from shifting or twisting during assembly, and ensuring the positional stability and long-term working reliability of the temperature and pressure sensor 300 in the housing.

[0039] In one embodiment, such as Figure 1 and Figure 2As shown, the second surface of the temperature and pressure sensing end 340 is fixedly connected to the support platform 107 of the housing 100 by a first adhesive 310. The first surface of the temperature and pressure sensing end 340 is fixedly connected to the outer wall of the base 203 by a second adhesive 311. Both the first adhesive 310 and the second adhesive 311 are double-sided adhesives with a hollow center. The hollow center area of ​​the first adhesive 310 and the second adhesive 311 exposes the pressure-sensitive electrode or temperature-sensitive electrode of the temperature and pressure sensing end 340. The overall thickness of the temperature and pressure sensor 300 is between 0.15mm and 0.3mm to maintain the sensor's detection sensitivity.

[0040] In this embodiment, double-sided adhesive tape (first adhesive 310 and second adhesive 311) with a central cutout is used to fix the temperature and pressure sensing end to the bottom surface of the inner wall of the outer shell 100 and to the outer wall of the base of the plastic part 200, respectively. The cutout area precisely exposes the pressure-sensitive electrode or temperature-sensitive electrode, which not only ensures reliable adhesion and fixation of the sensing end to the adjacent components on both sides, but also avoids the adhesive covering the sensing area and affecting the medium contact and signal acquisition. At the same time, the overall thickness of the temperature and pressure sensor 300 is controlled within 0.15mm-0.3mm, which effectively reduces the heat conduction path and pressure transmission loss, thereby ensuring the detection sensitivity of temperature and pressure.

[0041] In one embodiment, the sealant 501 filling the housing 100 can prevent liquid or gas entering from the inlet 105 and channel 106 from corroding the temperature and pressure sensor 300. In one embodiment, liquid and gas contact the temperature sensing module first through the inlet 105 and channel 106, and then contact the pressure sensing module.

[0042] In this embodiment, the liquid or gas entering through the inlet 105 and the channel 106 is physically isolated by filling the metal shell 100 with sealant 501, so that the measured medium comes into contact with the temperature sensing module first and then with the pressure sensing module. This structural design not only uses the sealant 501 to protect the internal electrical connections of the temperature and pressure sensor 300 from media corrosion, but also ensures that the temperature sensing module can respond preferentially to changes in the medium temperature through the orderly flow path of the medium, avoiding the disturbance of the temperature field by the pressure sensing module, and improving the accuracy and response speed of dual-parameter detection.

[0043] In one embodiment, after the connector 400 is inserted into the plastic part 200, the outer edge of the metal housing 100 is rolled and fixed, and a ring-shaped sealant 500 is applied for sealing, which can prevent external gas or liquid from entering the interior of the connector 400 and corroding the electrical connection.

[0044] In this embodiment, after the connector 400 is inserted into the plastic part 200, the outer edge of the metal shell 100 is rolled and fixed, and epoxy resin is applied to form a ring sealant 500, which completely seals the joint between the shell 100 and the connector 400. This external sealing structure (ring sealant 500) can effectively prevent moisture, dust or corrosive gases from the external environment from entering the product through the mating gap between the shell 100 and the connector 400, protecting the electrical contact points inside the connector 400 from oxidation and corrosion, thereby significantly improving the long-term reliability and service life of the product under harsh working conditions.

[0045] In one embodiment, the connector 400 includes a connector base 402 and at least one limiting boss 403 fixedly connected thereto. When the temperature and pressure sensor 300, the plastic part 200, the housing 100 are fixedly and sealed with the connector 400, at least one limiting boss 403 is formed in at least one slot 201, and the side wall surface of at least one limiting boss 403 contacts the side wall surface of at least one support 202.

[0046] In this embodiment, the connector 400 is provided with a limiting boss 403, which, after assembly, is located in the slot 201 of the plastic part 200 and forms contact with the side wall of the support body 202. Through the staggered contact between the limiting boss 403 and the support body 202, the connector 400 and the plastic part 200 are double-limited and fixed in the circumferential and radial directions. Compared with a single plug structure, this multi-point contact staggered engagement method can more evenly distribute external vibration and impact loads, prevent the connector 400 from loosening or rotating relative to the plastic part 200, and significantly enhance the stability and vibration resistance of the overall structure.

[0047] like Figure 6 As shown, when the housing 100, plastic part 200 and connector 400 fix the temperature and pressure sensor 300, the extension direction of the flexible connection part 330 is parallel to the first direction, the extension plane of the electrical connection end 320 is parallel to the extension plane of the temperature and pressure sensing end 340, and the extension plane of the electrical connection end 320 is perpendicular to the first direction.

[0048] like Figure 5 As shown, the plastic part 200 is a cylindrical, hollow structure with a slot 201, a support 202, and a base 203. The slot 201 facilitates the passage of the flexible connection part 330. The plastic part 200 serves a supporting function.

[0049] The connector 400 has a limiting boss 403 that serves as a limiting element, and the limiting boss 403 engages with the slot 201. The annular sealant 500 and the filling sealant 501 serve as a sealing and fixing element.

[0050] In one embodiment, the first surface of the temperature and pressure sensing end 340 is a pressure sensing module, and / or, the second surface of the temperature and pressure sensing end 340 is a pressure sensing module. Figure 1 and Figure 4 In the embodiment shown, the first surface of the temperature and pressure sensing end 340 ( Figure 1 The upper surface of the temperature and pressure sensing end 340 (the surface furthest from the housing 100) can be configured as a pressure sensing module. Figure 1 The upper surface of the module (the surface 100 away from the outer casing) is the temperature sensing module.

[0051] In this embodiment, the pressure sensing module is disposed on the first surface and / or the second surface of the temperature and pressure sensing end. With this flexible layout, the pressure sensing surface can be positioned facing the medium inflow side (first surface) or away from the medium side (second surface) according to different installation space and medium contact requirements. This can optimize the contact method between the pressure sensing unit and the medium to improve measurement accuracy, and can also adapt to the space constraints of different housing structures and flow channel designs, thereby improving the design flexibility and application adaptability of the product.

[0052] In one embodiment, the step of potting the temperature and pressure sensor 300, the plastic part 200, and the housing 100 includes: After removing the pins of connector 400, housing 100 is placed in a vacuum environment, and liquid epoxy resin is injected through the top opening of housing 100 to fill the temperature and pressure sensing end 340, the interior of housing 100, base 203, part of slot 201, and part of support 202. The component after epoxy resin injection is heated and cured to completely harden the filling sealant 501.

[0053] In this embodiment, liquid epoxy resin is injected into the top opening of the outer casing 100 under vacuum and then heated and cured. The vacuum potting process can effectively eliminate air bubbles in the filling area, ensuring that the epoxy resin fully fills all the tiny gaps such as the temperature and pressure sensing end, the inside of the outer casing, the base, the slot and the support, forming a dense filling sealant without gaps. This eliminates potential media leakage channels to the greatest extent. At the same time, the epoxy resin after heating and curing has excellent resistance to media corrosion and mechanical strength, providing long-term and reliable protection for internal sensitive components.

[0054] In one embodiment, the annular sealant 500 is a UV-curable or thermosetting adhesive, and the specific steps for rolling and sealing the second end 102 of the housing 100 include: After re-inserting the pins of connector 400 into the electrical connection socket of electrical connection end 320, the housing 100 is rotated around its axis, while sealant is applied to the joint between the second end 102 and connector 400 using a dispensing needle. During or after the application, radial pressure is applied to the second end 102 using a rolling tool, causing slight plastic deformation to form an interference fit with connector 400, while annular sealant 500 fills the tiny gap between them. The applied annular sealant 500 is then cured to achieve a fixed, sealed connection between housing 100 and connector 400.

[0055] In this embodiment, by rotating the outer shell 100 around its axis while applying adhesive and rolling, the outer wall undergoes slight plastic deformation under radial pressure, forming an interference fit with the connector 400. Simultaneously, the annular sealant 500 fills the tiny gap between the two. This composite connection method of "mechanical interference + adhesive sealing" not only utilizes plastic deformation to achieve a firm physical lock between the outer shell 100 and the connector 400, but also uses sealant to fill all microscopic uneven areas, forming a double-protected sealing interface, which significantly improves the tensile strength and leakage prevention capability of the external interface.

[0056] This application also provides a method such as Figures 1 to 7 The temperature and pressure detection sensor device 1000 shown herein, wherein, Figure 7 To package a complete temperature and pressure detection sensor device 1000. The temperature and pressure detection sensor device 1000 includes: a housing 100, a plastic part 200, a temperature and pressure sensor 300, a connector 400, a filling sealant 501, and a ring sealant 500.

[0057] The outer casing 100 may be a metal casing. A plastic part 200 is disposed inside the outer casing 100. The plastic part 200 includes a base 203, at least one slot 201 extending along a first direction and disposed on the base 203, and at least one support body 202 extending along the first direction.

[0058] The temperature and pressure sensor 300 includes an electrical connection terminal 320, a temperature and pressure sensing terminal 340, and a flexible connection portion 330 electrically connecting the electrical connection terminal 320 and the temperature and pressure sensing terminal 340. The temperature and pressure sensing terminal 340 has a first surface and a second surface that are opposite to each other, and a temperature sensing module and a pressure sensing module are respectively disposed on the two surfaces. The first surface of the temperature and pressure sensing terminal 340 (e.g., Figure 1 The upper surface of the temperature and pressure sensing terminal 340 (as shown) is fixedly connected to the outer wall of the base 203, and the second surface of the temperature and pressure sensing terminal 340 (as shown) is fixedly connected to the outer wall of the base 203. Figure 1The lower surface of the temperature and pressure sensing terminal 340 (shown) is fixedly connected to the support platform 107 of the housing 100, so that the support platform 107, the temperature and pressure sensing terminal 340, and the base 203 of the housing 100 are stacked sequentially in the first direction. The flexible connection portion 330 is located in at least one slot 201 and is spaced apart from at least one support body 202. The flexible connection portion 330 can be a flexible printed circuit board (FPC), such as a polyimide (PI) substrate, a polyester (PET) substrate, etc. The PI substrate is a light yellow semi-transparent film, through which the built-in metal circuit layer can be clearly seen.

[0059] The pins of connector 400 are inserted into the electrical connection socket of electrical connection terminal 320 and electrically connected to electrical connection terminal 320.

[0060] The sealant 501 is filled into the bearing wall 108 of the housing 100 and at least covers the temperature and pressure sensing end 340, part of the flexible connection 330, part of the slot 201 and part of the support 202.

[0061] A ring-shaped sealant 500 is disposed between the second end 102 of the housing 100 and the connector 400, and the second end 102 is fixedly pressed to the outside of the connector 400 to achieve a fixed and sealed connection between the housing 100 and the connector 400.

[0062] In this embodiment, the provided temperature and pressure detection sensor device 1000, through the integrated design of the housing 100, plastic part 200, temperature and pressure sensor 300, connector 400, filling sealant 501 and ring sealant 500, constructs a dual sealing structure of internal potting + external rolling sealant. The filling sealant 501 covers the temperature or pressure sensing end and the flexible connection part 330 to block the internal leakage path, and the ring sealant 500 seals the joint between the housing 100 and the connector 400 to prevent the intrusion of external media. The synergistic effect of the two fundamentally solves the problem of difficult sealing of lead channels in the prior art, realizes highly reliable full-sealed protection, and at the same time ensures accurate detection of temperature and pressure.

[0063] In one embodiment, the second surface of the temperature and pressure sensing terminal 340 is fixedly connected to the support platform 107 of the housing 100 by a first adhesive 310. The first surface of the temperature and pressure sensing terminal 340 is fixedly connected to the outer wall of the base 203 by a second adhesive 311. Both the first adhesive 310 and the second adhesive 311 are double-sided adhesives with a hollow center. The hollow center area of ​​the first adhesive 310 and the second adhesive 311 exposes the area where the pressure-sensitive electrode or temperature-sensitive electrode of the temperature and pressure sensing terminal 340 is located.

[0064] In this embodiment, a double-sided adhesive with a central cutout is used as the fixing medium between the temperature and pressure sensing end and the bottom surface of the inner wall of the housing, as well as the plastic base. The cutout design allows the pressure-sensitive electrode or temperature-sensitive electrode to be directly exposed to the measured medium or pressure transmission channel, avoiding the obstruction or attenuation of pressure and heat conduction by the adhesive layer. This ensures direct and effective contact between the sensing element and the measured medium, thereby achieving a stable assembly while maximizing the preservation of the original detection sensitivity and response characteristics of the temperature and pressure sensor 300.

[0065] In one embodiment, the connector 400 includes a connector base 402 and at least one limiting boss 403 fixedly connected thereto. The at least one limiting boss 403 is located in at least one slot 201, and the sidewall of the at least one limiting boss 403 contacts the sidewall of at least one support 202.

[0066] In this embodiment, the limiting boss 403 of the connector 400 is embedded in the slot 201 of the plastic part 200 and contacts the side wall of the support body 202, forming a surface contact mating structure between the limiting boss 403 and the support body 202. This design ensures that after the connector 400 is inserted, it is not only circumferentially limited by the slot 201, but also provides an additional radial support surface through the support body 202. This effectively increases the contact area and mating stability between the connector 400 and the plastic part 200, and can resist complex forces from multiple directions, preventing loosening of the connection due to vibration or thermal expansion and contraction, and ensuring the reliability of the electrical connection during long-term use.

[0067] In one embodiment, the first surface of the temperature and pressure sensing end 340 is a pressure sensing module, and / or the second surface of the temperature and pressure sensing end 340 is a pressure sensing module.

[0068] In this embodiment, by setting the pressure sensing module on the first or second surface of the temperature and pressure sensing end, the pressure sensing unit can be oriented according to the specific location of the housing inlet and flow channel. The pressure sensing surface can be preferentially arranged on the side closer to the medium flow direction, thereby reducing the influence of medium flow resistance on pressure measurement and improving the accuracy of dynamic pressure response. At the same time, this layout flexibility also provides the possibility of optimizing the arrangement of temperature and pressure modules under different installation spaces and avoids internal space interference.

[0069] In one embodiment, the sealant 501 is epoxy resin, which fills the space defined by the temperature and pressure sensing end 340, the inside of the housing 100, the base 203, the partial slot 201, and the partial support 202, and is cured by heating.

[0070] In this embodiment, epoxy resin that has been cured by heat is used as the filler sealant 501. After curing, epoxy resin has high bonding strength, low shrinkage rate and excellent chemical resistance. When filled in the space defined by the temperature and pressure sensing end, the inside of the outer shell, the base, the partial slot and the support, it can firmly bond these components together to form a rigid internal support structure. This not only enhances the overall mechanical strength, but also provides long-term chemical protection for the internal sensitive element by utilizing its resistance to media, preventing corrosion from media such as refrigerant or lubricating oil.

[0071] In one embodiment, the ring sealant 500 is a UV-curable or thermosetting adhesive that fills the tiny gap between the second end 102 of the housing 100 and the connector 400. The second end 102 has a slight plastic deformation and forms an interference fit with the connector 400.

[0072] In this embodiment, UV-curable or thermosetting adhesive is used as the ring sealant 500. Rolling causes slight plastic deformation of the outer wall of the housing 100 to form an interference fit with the connector 400. The sealant fills the tiny gap between the two. This design utilizes the residual compressive stress generated by plastic deformation to keep the housing 100 and the connector 400 in close contact at all times, and they will not loosen even under temperature cycling or pressure fluctuations. At the same time, the elastic sealing layer formed after the sealant cures can effectively absorb vibration energy and compensate for small gap changes, realizing an organic combination of mechanical locking and elastic sealing, which greatly improves the sealing durability of the interface.

[0073] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In addition, the terms "first", "second", "third", etc. are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0074] Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The protection scope of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the scope of the technology disclosed in this application; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application. All should be covered within the protection scope of this application. Therefore, the protection scope of this application should be determined by the protection scope of the claims.

Claims

1. A method for preparing a temperature and pressure detection sensor device, characterized in that, include: A temperature and pressure sensor (300) is provided, wherein the temperature and pressure sensor (300) includes an electrical connection terminal (320), a temperature and pressure sensing terminal (340), and a flexible connection portion (330) electrically connecting the electrical connection terminal (320) and the temperature and pressure sensing terminal (340); a temperature sensing module and a pressure sensing module are disposed on the front and back surfaces of the temperature and pressure sensing terminal (340); A connector (400) is provided, and the pins of the connector (400) are inserted into the electrical connection socket of the electrical connection end (320); A plastic part (200) is provided, wherein the plastic part (200) includes: a base (203), at least one slot (201) extending in the base (203) along a first direction, and at least one support (202) extending in the first direction. The first surface of the temperature and pressure sensing end (340) is fixedly connected to the outer wall of the base (203); the flexible connection part (330) is located in at least one of the slots (201) and is spaced apart from at least one of the supports (202); A housing (100) is provided, and the second surface of the temperature and pressure sensing end (340) is fixedly connected to the support platform (107) of the housing (100); the plastic part (200) is located inside the housing (100), and the support platform (107), the temperature and pressure sensing end (340), and the base (203) are stacked sequentially in the first direction; Pull the pins of the connector (400) out of the electrical connection socket of the electrical connection end (320) and pot the temperature and pressure sensor (300), the plastic part (200) and the housing (100) to form a filling sealant (501) inside the housing (100). Insert the pins of the connector (400) into the electrical connection socket of the electrical connection end (320) again, roll and seal the outer wall (102) of the housing (100) to form a ring sealant (500) to fix and press the outer wall (102) to the outside of the connector (400), thereby achieving a fixed and sealed connection between the temperature and pressure sensor (300), the plastic part (200), the housing (100) and the connector (400).

2. The method for preparing the temperature and pressure detection sensor device according to claim 1, characterized in that, The second surface of the temperature and pressure sensing end (340) is fixedly connected to the support platform (107) of the outer shell (100) by the first adhesive (310); The first surface of the temperature and pressure sensing end (340) is fixedly connected to the outer wall of the base (203) by a second adhesive (311); Both the first adhesive (310) and the second adhesive (311) are double-sided adhesives with a hollow center; the hollow center area of ​​the first adhesive (310) and the second adhesive (311) exposes the pressure-sensitive electrode or temperature-sensitive electrode of the temperature and pressure sensing end (340).

3. The method for preparing the temperature and pressure detection sensor device according to claim 1, characterized in that, The connector (400) includes: a connector base (402) and at least one limiting boss (403) fixedly connected thereto. When the temperature and pressure sensor (300), the plastic part (200), the housing (100) and the connector (400) are fixedly and sealed together, at least one of the limiting bosses (403) is formed in at least one of the slots (201), and the side wall of at least one of the limiting bosses (403) is in contact with the side wall of at least one of the supports (202).

4. The method for preparing the temperature and pressure detection sensor device according to claim 1, characterized in that, The first surface of the temperature and pressure sensing end (340) is the pressure sensing module, and / or the second surface of the temperature and pressure sensing end (340) is the pressure sensing module.

5. The method for preparing the temperature and pressure detection sensor device according to claim 1, characterized in that, The steps of potting the temperature and pressure sensor (300), the plastic part (200), and the housing (100) include: After the pins of the connector (400) are pulled out, the housing (100) is placed in a vacuum environment, and liquid epoxy resin is injected from the top opening of the housing (100) to fill the temperature and pressure sensing end (340), the interior of the housing (100), the base (203), part of the slot (201) and part of the support (202). The component after epoxy resin injection is heated and cured to fully harden the filler sealant (501).

6. The method for preparing the temperature and pressure detection sensor device according to claim 1, characterized in that, The ring-shaped sealant (500) is a UV-curable or thermosetting adhesive. The specific steps for rolling and sealing the outer wall (102) of the outer shell (100) include: After inserting the pins of the connector (400) into the electrical connection socket of the electrical connection end (320) again, the housing (100) is rotated about its axis, and sealant is applied to the joint between the outer wall (102) and the connector (400) by a dispensing needle. During or after coating, radial pressure is applied to the outer wall (102) by a rolling tool, causing the outer wall (102) to undergo slight plastic deformation, forming an interference fit with the connector (400), while the annular sealant (500) fills the tiny gap between them. The applied ring sealant (500) is cured to achieve a fixed and sealed connection between the housing (100) and the connector (400).

7. A temperature and pressure detection sensor device, characterized in that, include: Outer shell (100); A plastic part (200) is disposed inside the housing (100). The plastic part (200) includes a base (203), at least one slot (201) extending in the base (203) along a first direction, and at least one support (202) extending in the first direction. A temperature and pressure sensor (300) includes an electrical connection terminal (320), a temperature and pressure sensing terminal (340), and a flexible connection portion (330) electrically connecting the electrical connection terminal (320) and the temperature and pressure sensing terminal (340). The temperature and pressure sensing terminal (340) has a first surface and a second surface that are opposite to each other, and a temperature sensing module and a pressure sensing module are respectively provided on the two surfaces. The first surface of the temperature and pressure sensing terminal (340) is fixedly connected to the outer wall of the base (203), and the second surface of the temperature and pressure sensing terminal (340) is fixedly connected to the support platform (107) of the outer shell (100), so that the support platform (107), the temperature and pressure sensing terminal (340), and the base (203) are stacked sequentially in the first direction. The flexible connection portion (330) is located in at least one slot (201) and is spaced apart from at least one support body (202). A connector (400) has pins that are inserted into the electrical connection socket of the electrical connection terminal (320) and are electrically connected to the electrical connection terminal (320); A sealant (501) is filled into the bearing wall (108) of the housing (100), and at least covers the temperature and pressure sensing end (340), a portion of the flexible connection (330), a portion of the slot (201), and a portion of the support (202); and A ring-shaped sealant (500) is disposed between the outer side wall (102) of the housing (100) and the connector (400) to fix and press the outer side wall (102) to the outside of the connector (400) so as to achieve a fixed and sealed connection between the housing (100) and the connector (400).

8. The temperature and pressure detection sensor device according to claim 7, characterized in that, The second surface of the temperature and pressure sensing terminal (340) is fixedly connected to the support platform (107) of the outer shell (100) by a first adhesive (310); the first surface of the temperature and pressure sensing terminal (340) is fixedly connected to the outer wall of the base (203) by a second adhesive (311); both the first adhesive (310) and the second adhesive (311) are double-sided adhesives with a hollow center; the hollow center area of ​​the first adhesive (310) and the second adhesive (311) exposes the area where the pressure-sensitive electrode or temperature-sensitive electrode of the temperature and pressure sensing terminal (340) is located.

9. The temperature and pressure detection sensor device according to claim 7, characterized in that, The connector (400) includes: a connector base (402) and at least one limiting boss (403) fixedly connected thereto; at least one limiting boss (403) is located in at least one slot (201), and the side wall of at least one limiting boss (403) is in contact with the side wall of at least one support (202).

10. The temperature and pressure detection sensor device according to claim 7, characterized in that, The first surface of the temperature and pressure sensing end (340) is the pressure sensing module, and / or the second surface of the temperature and pressure sensing end (340) is the pressure sensing module.

11. The temperature and pressure detection sensor device according to claim 7, characterized in that, The filling sealant (501) is epoxy resin, which fills the space defined by the temperature and pressure sensing end (340), the inside of the outer shell (100), the base (203), part of the slot (201) and part of the support (202), and is cured by heating.

12. The temperature and pressure detection sensor device according to claim 7, characterized in that, The ring-shaped sealant (500) is a UV-curable or thermosetting adhesive, which fills the tiny gap between the outer side wall (102) of the housing (100) and the connector (400). The outer side wall (102) has a slight plastic deformation and forms an interference fit with the connector (400).

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