Quick response thermistor temperature sensor

Abstract

The utility model relates to the technical field of temperature sensing, in particular to a quick-response thermistor temperature sensor. The thermistor comprises a thermistor body, the surface of the thermistor body is fixedly connected with a polymer microporous protective sealing film, the surface of the polymer microporous protective sealing film is movably connected with a metal shell, and the surface of the thermistor body is completely sealed by the polymer microporous protective sealing film. And the metal shell partially wraps the macromolecular microporous protective sealing film. According to the utility model, a layer of polymer micropore protection sealing film is arranged on the surface of the thermistor, so that temperature change is allowed to be rapidly conducted to the interior of the sensor, and fluid or moisture can be effectively prevented from invading, thereby solving the problem that thermal resistance and time are increased when a thicker anti-leakage material is used for transferring temperature.

Description

Technical Field

[0001] This utility model relates to the field of temperature sensing technology, and more specifically, to a fast-response thermistor temperature sensor. Background Technology

[0002] Thermistors and temperature sensors, with thermistor chips as their core components and packaged in various forms, are widely used in various temperature detection, temperature compensation, and temperature control circuits. They play a crucial role in converting temperature variables into the required electronic signals. With the development of electronic technology, various electronic devices are becoming increasingly multifunctional and intelligent, leading to a surge in the application of thermistor chips in various applications requiring temperature detection, control, and compensation. Because temperature sensors need to operate in humid environments, the requirements for waterproofing and moisture resistance are becoming increasingly stringent.

[0003] Existing thermistor temperature sensors typically use a sealed material and a metal housing to encase the thermistor to ensure leak-proof performance. However, this method has significant drawbacks: temperature changes need to pass through a relatively thick layer of leak-proof material to reach the probe, which not only increases thermal resistance but also prolongs response time, affecting measurement accuracy and real-time performance. In some applications, such as medical devices, food processing, and chemical reaction monitoring, this delay is unacceptable. Therefore, we propose a fast-response thermistor temperature sensor. Utility Model Content

[0004] The purpose of this invention is to provide a fast-response thermistor temperature sensor to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides a fast-response thermistor temperature sensor, including a thermistor body, a polymer microporous protective sealing film fixedly connected to the surface of the thermistor body, a metal shell movably connected to the surface of the polymer microporous protective sealing film, the surface of the thermistor body being completely sealed by the polymer microporous protective sealing film, and the metal shell partially enclosing the polymer microporous protective sealing film.

[0006] As a further improvement to this technical solution, a number of thermistor wires are fixedly connected to the top of the thermistor body. The thermistor wires penetrate the polymer microporous protective sealing film and are fixedly connected to the surface of the thermistor wires and the connection point between the surface of the thermistor wires and the polymer microporous protective sealing film.

[0007] As a further improvement to this technical solution, a mounting head is fixedly connected to the end of the thermistor wire away from the thermistor body, and an intake air temperature sensor housing is fixedly connected to the side of the mounting head away from the thermistor wire.

[0008] As a further improvement to this technical solution, the inner cavity of the intake air temperature sensor housing is fixedly connected with a drop-proof connector.

[0009] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0010] This fast-response thermistor temperature sensor utilizes a polymer microporous protective sealing film that adheres closely to the surface of the thermistor body, forming a near-direct contact heat exchange interface. This minimizes heat transfer time, ensuring the sensor's instantaneous response to temperature changes. Furthermore, the polymer microporous protective sealing film has extremely low thermal resistance, allowing temperature changes to be rapidly conducted to the thermistor body, thus significantly shortening the sensor's response time to ambient temperature changes. Compared to traditional methods using thicker leak-proof materials, this design can capture temperature changes with almost no delay. The metal casing not only provides physical protection but also effectively reduces the impact of external mechanical vibration and other environmental factors on the measurement results, further improving measurement accuracy. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0012] Figure 2 This is a cross-sectional structural diagram of the thermistor body assembly of this utility model.

[0013] The meanings of the labels in the diagram are as follows:

[0014] 1. Drop-proof connector; 2. Inlet air temperature sensor housing; 3. Mounting head; 4. Thermistor wire; 5. Metal housing; 6. Polymer microporous protective sealing film; 7. Thermistor body. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0017] Furthermore, in the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0018] Please see Figure 2 As shown, this utility model provides a fast-response thermistor temperature sensor, including a thermistor body 7. A polymer microporous protective sealing film 6 is fixedly connected to the surface of the thermistor body 7, and a metal shell 5 is movably connected to the surface of the polymer microporous protective sealing film 6. The surface of the thermistor body 7 is completely sealed by the polymer microporous protective sealing film 6, and the metal shell 5 partially wraps the polymer microporous protective sealing film 6. By using the polymer microporous protective sealing film 6 to closely adhere to the surface of the thermistor body 7, an almost direct contact heat exchange interface is formed. Compared with the traditional method of using thicker anti-leakage materials, this film greatly reduces thermal resistance, allowing temperature changes to be sensed by the thermistor body 7 with almost no delay. It can not only effectively prevent liquids and moisture from entering, but also ensure that temperature changes are quickly conducted into the thermistor body 7. Because of its low thermal resistance characteristics, it allows for rapid heat transfer. In order to protect the internal components from external physical damage or chemical corrosion, while not hindering the transmission of temperature signals, the metal shell 5 only partially wraps the polymer microporous protective sealing film 6. This semi-sealed structure provides necessary mechanical protection without affecting the sensor's fast response performance.

[0019] Please see Figures 1-2 As shown, in this embodiment, a plurality of thermistor wires 4 are fixedly connected to the top of the thermistor body 7. The thermistor wires 4 penetrate the polymer microporous protective sealing film 6 and are fixedly connected to the surface of the thermistor wires 4 and the connection point between the surface of the thermistor wires 4 and the polymer microporous protective sealing film 6.

[0020] Please see Figure 1As shown, furthermore, the end of the thermistor wire 4 away from the thermistor body 7 is fixedly connected to the mounting head 3, and the side of the mounting head 3 away from the thermistor wire 4 is fixedly connected to the intake air temperature sensor housing 2. The mounting head 3 facilitates the integration of the sensor into other devices, and the other side of the mounting head 3 is connected to the intake air temperature sensor housing 2, which further enhances the overall protection performance.

[0021] Please see Figure 1 As shown, specifically, the inner cavity of the intake air temperature sensor housing 2 is fixedly connected to a drop-proof connector 1. The drop-proof connector 1 is located in the inner cavity of the intake air temperature sensor housing 2 and is used to connect to external circuits. It is designed to be drop-proof, which increases the reliability of the sensor in harsh environments.

[0022] Please see Figures 1-2 As shown, this fast-response thermistor temperature sensor optimizes the relationship between the thermistor body 7 and the polymer microporous protective sealing film 6 to construct an efficient heat conduction path, thereby achieving real-time capture of temperature changes. At the same time, the ingenious packaging design and the application of auxiliary components ensure that the sensor maintains good performance and long lifespan in various complex environments. These features work together to make the sensor particularly suitable for applications that require real-time and accurate temperature measurement, such as medical equipment, food processing, and chemical reaction monitoring.

[0023] In summary, the working principle of this solution is as follows:

[0024] Heat is applied directly to the thermistor body 7 through the polymer microporous protective sealing film 6, causing a corresponding change in its resistance value. As the resistance value of the thermistor body 7 changes, the corresponding current or voltage will also change. These electrical signals are transmitted to the external measurement circuit through the fixedly connected thermistor wire 4. The connection between the mounting head 3 and the intake air temperature sensor housing 2 ensures the stability and reliability of the sensor, while the drop-proof connector 1 enhances the sensor's survivability in the event of an accidental drop or strong vibration.

[0025] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A fast-response thermistor temperature sensor, comprising a thermistor body (7), characterized in that: A polymer microporous protective sealing film (6) is fixedly connected to the surface of the thermistor body (7), and a metal shell (5) is movably connected to the surface of the polymer microporous protective sealing film (6), wherein: The surface of the thermistor body (7) is completely sealed by a polymer microporous protective sealing film (6), and the metal shell (5) is partially wrapped with the polymer microporous protective sealing film (6).

2. The fast-response thermistor temperature sensor according to claim 1, characterized in that: Several thermistor wires (4) are fixedly connected to the top of the thermistor body (7), wherein: The thermistor wire (4) penetrates the polymer microporous protective sealing film (6) and is fixedly connected to the surface of the thermistor wire (4) at the connection point with the polymer microporous protective sealing film (6).

3. The fast-response thermistor temperature sensor according to claim 2, characterized in that: The end of the thermistor wire (4) away from the thermistor body (7) is fixedly connected to the mounting head (3), and the side of the mounting head (3) away from the thermistor wire (4) is fixedly connected to the intake air temperature sensor housing (2).

4. The fast-response thermistor temperature sensor according to claim 3, characterized in that: The inner cavity of the intake air temperature sensor housing (2) is fixedly connected to a drop-proof connector (1).

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