An isolated temperature sensor

Abstract

The application provides an isolated temperature sensor applied to the technical field of temperature sensors, which comprises a stainless steel shell, a plastic isolating piece, a metal structural piece, a thermistor and a connector; the thermistor is arranged in the stainless steel shell, the inside of the stainless steel shell is filled with heat-conducting glue, and the heat-conducting glue wraps the thermistor; the plastic isolating piece is sleeved on the stainless steel shell and located at the first end of the stainless steel shell, and the second end of the stainless steel shell extends out of the plastic isolating piece; the first end of the connector is connected with the first end of the thermistor; the metal structural piece is sleeved on the plastic isolating piece and the connector, and the metal structural piece is adapted to the plastic isolating piece. The application can solve the problem that the environmental temperature disturbs the measurement of the fluid temperature by the thermistor, and causes the measured fluid temperature to be partially distorted.

Description

Technical Field

[0001] This application relates to the field of temperature sensor technology, and in particular to an isolated temperature sensor. Background Technology

[0002] In automotive thermal management systems (including battery thermal management, motor cooling systems, and air conditioning refrigeration cycles), temperature sensors are core components for achieving energy efficiency optimization and system safety. By monitoring the temperature of fluids such as coolant and refrigerant in real time, they provide crucial data input for thermal management control strategies, directly impacting the accuracy of vehicle energy consumption management, system reliability, and driving comfort.

[0003] However, when the temperature sensor is installed in a complex thermal environment such as the engine compartment or battery pack, its metal casing will exchange heat with the surrounding high-temperature components (such as motor housing, exhaust pipe, etc.) or low-temperature airflow, causing the thermistor inside the sensor to be affected by both the temperature of the fluid being measured and the ambient temperature, resulting in distortion of the output signal. Utility Model Content

[0004] The purpose of this application is to provide an isolated temperature sensor to solve the problem of interference from ambient temperature on the temperature of fluid measured by thermistor, which causes partial distortion of the measured fluid temperature.

[0005] In a first aspect, embodiments of this application provide an isolated temperature sensor, which includes a stainless steel housing, a plastic insulating component, a metal structural component, a thermistor, and a connector;

[0006] The thermistor is disposed inside the stainless steel housing, and the stainless steel housing is filled with thermally conductive adhesive, which encapsulates the thermistor.

[0007] The plastic spacer is fitted onto the stainless steel housing and is located at the first end of the stainless steel housing, while the second end of the stainless steel housing extends out of the plastic spacer.

[0008] The first end of the connector is connected to the first end of the thermistor;

[0009] The metal structural component is fitted onto the plastic isolator and the connector, and the metal structural component is adapted to the plastic isolator.

[0010] In one possible implementation, the isolated temperature sensor further includes an annular plastic bracket; the annular plastic bracket is fixed to the connector and is assembled and pressed against the upper end of the stainless steel housing.

[0011] In one possible implementation, the surface of the metal structural component is provided with a first groove, which is located at the connection between the metal structural component and the plastic isolator; the isolated temperature sensor further includes a first sealing ring, which is located in the first groove to form a seal.

[0012] In one possible implementation, the surface of the plastic isolator is provided with a second groove, which is located at the connection between the plastic isolator and the stainless steel housing; the isolated temperature sensor further includes a sealing structure, which is located in the second groove to form a seal.

[0013] One possible implementation is that the sealing structure is a second sealing ring.

[0014] In one possible implementation, the connector has an outwardly protruding riveting support platform at one end near the annular plastic bracket; the first end of the metal structural component has an upwardly extending thin-walled riveting surface; the riveting support platform and the thin-walled riveting surface are pressed and fixed together by a roll riveting method.

[0015] In one possible implementation, the first end of the thermistor is provided with a lead; the first end of the connector is soldered to the lead of the first end of the thermistor.

[0016] One possible implementation is that an insulating layer is provided on the surface of the thermistor.

[0017] One possible implementation is that the insulating layer is composed of epoxy resin and heat shrink tubing.

[0018] One possible implementation is that the surface of the metal structural component is provided with a protrusion, and the outer end face of the protrusion is a circular surface; the surface of the metal structural component is also provided with threads.

[0019] The isolated temperature sensor provided in this application, by placing the thermistor inside a stainless steel housing filled with thermally conductive adhesive, ensures that the thermistor can respond promptly to the temperature of the measured fluid. Simultaneously, a plastic isolator is placed between the stainless steel housing and the metal structural components. This plastic isolator, with its poor thermal conductivity, isolates the thermistor from the metal structural components, reducing the influence of ambient temperature (other than the measured fluid) on the thermistor's temperature and improving the accuracy of the temperature measurement by the isolated temperature sensor. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 A schematic diagram of a heat-insulated temperature sensor provided in an embodiment of this application;

[0022] Figure 2 An internal schematic diagram of an isolated temperature sensor provided in an embodiment of this application;

[0023] In the diagram: Stainless steel housing-1, plastic isolation component-2, metal structural component-3, connector-4, thermistor-5, annular plastic bracket-6, first sealing ring-7, sealing structure-8. Detailed Implementation

[0024] 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.

[0025] 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 to illustrate selected embodiments of the 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.

[0026] On one hand, embodiments of this application provide a heat-insulated temperature sensor. For example... Figure 1 As shown, Figure 1 This is a schematic diagram of a thermally insulated temperature sensor provided in an embodiment of this application. The thermally insulated temperature sensor includes a stainless steel housing 1, a plastic insulating component 2, a metal structural component 3, and a connector 4.

[0027] The plastic isolator 2 is fitted onto the stainless steel housing 1 and is located at the first end of the stainless steel housing 1, while the second end of the plastic isolator 2 extends out of the stainless steel housing 1. In use, the second end of the stainless steel housing 1 is in direct contact with the fluid being measured.

[0028] The first end of connector 4 is connected to the first end of the thermistor 5. During use, the second end of connector 4 is connected to a data wire.

[0029] The metal structural component 3 is fitted onto the plastic spacer 2 and the connector 4, and the metal structural component 3 is adapted to the plastic spacer 2. For example, the metal structural component 3 can be flush with the plastic spacer 2.

[0030] like Figure 2 As shown, Figure 2 This is an internal schematic diagram of an isolated temperature sensor provided in an embodiment of this application. The structure of the heat-insulated temperature sensor specifically includes: a stainless steel housing 1, a plastic insulating component 2, a metal structural component 3, a thermistor 5, and a connector 4.

[0031] The thermistor 5 is housed inside the stainless steel casing 1, which is filled with thermally conductive adhesive. This adhesive encapsulates the thermistor 5, enabling it to respond promptly to temperature changes in the fluid being measured.

[0032] A plastic isolator 2 is fitted onto the stainless steel housing 1 and is located at the first end of the stainless steel housing 1, with the second end of the stainless steel housing 1 extending out of the plastic isolator 2. In use, by employing the plastic isolator 2, which has poor thermal conductivity, the thermistor 5 and the stainless steel housing 1 can be isolated from the metal structural component 3, reducing the influence of ambient temperature (excluding the measured fluid) on the temperature of the thermistor 5 and improving the accuracy of temperature measurement by the isolated temperature sensor.

[0033] The first end of connector 4 is connected to the first end of thermistor 5.

[0034] The metal structural component 3 is fitted onto the plastic isolator 2 and the connector 4, and the metal structural component 3 is adapted to the plastic isolator 2.

[0035] Furthermore, the isolated temperature sensor also includes an annular plastic bracket 6. The annular plastic bracket 6 is fixed to the connector 4, and the annular bracket is assembled and pressed against the upper end of the stainless steel housing 1, which can play a role in fixing and supporting, and enhance the stability of the overall structure.

[0036] A first groove is provided on the surface of the metal structural component 3, and the first groove is located at the connection between the metal structural component 3 and the plastic separator 2.

[0037] The isolated temperature sensor also includes a first sealing ring 7. The first sealing ring 7 is disposed in the first groove to form a seal, which can effectively prevent the influence of the external environment on the internal components and improve the sealing performance and reliability of the isolated temperature sensor.

[0038] The surface of the plastic separator 2 is provided with a second groove, which is located at the connection between the plastic separator 2 and the stainless steel housing 1.

[0039] The isolated temperature sensor also includes a sealing structure 8, which is disposed in the second groove to form a seal.

[0040] The sealing structure 8 is a second sealing ring. This double sealing structure 8 further ensures the sealing performance of the isolated temperature sensor in complex environments, extends its service life, and guarantees the accuracy of temperature measurement.

[0041] The connector 4 has an outwardly protruding riveting support platform at one end near the annular plastic bracket 6. The first end of the metal structural component 3 has an upwardly extending thin-walled riveting surface. By using a roll riveting method, the riveting support platform and the thin-walled riveting surface are pressed and fixed together to form a robust connection structure. This ensures the stability of each isolated temperature sensor during use and prevents components from loosening or falling off due to vibration or external force, thus affecting the temperature measurement function.

[0042] The first end of the thermistor 5 is provided with a lead wire, and the first end of the connector 4 is soldered to the lead wire of the first end of the thermistor 5 to achieve a reliable electrical connection and ensure accurate signal transmission.

[0043] To improve the insulation performance and protective effect of the thermistor 5, an insulating layer is provided on the surface of the thermistor 5. In some embodiments, the insulating layer is composed of epoxy resin and heat-shrink tubing. This double-layer insulation treatment ensures the electrical safety of the thermistor 5 in complex environments and enhances its corrosion resistance and anti-interference ability.

[0044] The surface of metal structural component 3 is provided with protrusions, the outer end face of which is rounded, facilitating assembly and connection with other components. The surface of metal structural component 3 is also provided with threads, enabling convenient and quick installation and fixing via threaded connections, thus improving the product's ease of use and compatibility.

[0045] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An isolated temperature sensor, characterized in that, The isolated temperature sensor includes a stainless steel housing, a plastic insulating component, a metal structural component, a thermistor, and a connector. The thermistor is disposed inside the stainless steel housing, and the inside of the stainless steel housing is filled with thermally conductive adhesive, which encapsulates the thermistor. The plastic spacer is fitted onto the stainless steel housing and is located at the first end of the stainless steel housing, while the second end of the stainless steel housing extends out of the plastic spacer. The first end of the connector is connected to the first end of the thermistor; The metal structural component is fitted onto the plastic isolator and the connector, and the metal structural component is adapted to the plastic isolator.

2. The isolated temperature sensor according to claim 1, characterized in that, The isolated temperature sensor also includes an annular plastic bracket; the annular plastic bracket is fixed to the connector, and the annular plastic bracket is assembled and pressed against the upper end of the stainless steel housing.

3. The isolated temperature sensor according to claim 2, characterized in that, The surface of the metal structural component is provided with a first groove, which is located at the connection between the metal structural component and the plastic isolation component; the isolated temperature sensor also includes a first sealing ring, which is located in the first groove to form a seal.

4. The isolated temperature sensor according to claim 2, characterized in that, The surface of the plastic isolation component is provided with a second groove, which is located at the connection between the plastic isolation component and the stainless steel housing; the isolated temperature sensor also includes a sealing structure, which is located in the second groove to form a seal.

5. The isolated temperature sensor according to claim 4, characterized in that, The sealing structure is a second sealing ring.

6. The isolated temperature sensor according to claim 2, characterized in that, The connector has an outwardly protruding riveting support platform at one end near the annular plastic bracket; the first end of the metal structural component has an upwardly extending thin-walled riveting surface; the riveting support platform and the thin-walled riveting surface are pressed and fixed together by a roll riveting method.

7. The isolated temperature sensor according to claim 1, characterized in that, The thermistor has a lead wire at its first end; the connector is soldered to the lead wire at the first end of the thermistor.

8. The isolated temperature sensor according to claim 1, characterized in that, An insulating layer is provided on the surface of the thermistor.

9. The isolated temperature sensor according to claim 8, characterized in that, The insulating layer is composed of epoxy resin and heat shrink tubing.

10. The isolated temperature sensor according to claim 1, characterized in that, The surface of the metal structural component is provided with a protrusion, and the outer end face of the protrusion is a circular surface; the surface of the metal structural component is also provided with threads.

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