Thermistor temperature sensor for easy installation

Abstract

The utility model discloses a kind of thermistor temperature sensors of being convenient for installation, including shell and the thermistor core body placed in shell, thermistor core body is coated with epoxy resin, one end of lead wire is connected with thermistor core body, the other end passes through the corresponding through-hole of epoxy resin and is placed outside shell, shell is formed by the longitudinal shell and horizontal shell connection of common formation "L" shape structure, thermistor core body and epoxy resin are all placed in the inner chamber of longitudinal shell, mounting hole is equipped on horizontal shell.The utility model is by using the shell of "L" shape structure, and thermistor core body and mounting hole are respectively arranged in longitudinal shell and horizontal shell, on the one hand, it is convenient to install in narrow space or special-shaped structure, avoid causing device damage and improve installation efficiency, on the other hand, since thermistor core body and mounting hole are far away, and avoid damage to thermistor core body due to external force transmission in installation and use process, ensure that sensor measurement accuracy is not affected.

Description

Technical Field

[0001] This utility model relates to a thermistor temperature sensor, and more particularly to a thermistor temperature sensor that is easy to install. Background Technology

[0002] With the development of modern industrial automation and intelligence, temperature sensors, as key detection components, are widely used in automotive electronics, industrial control, home appliances, aerospace and other fields. In complex and harsh environments such as high temperature, high pressure, and vibration, higher requirements are placed on the structural reliability, installation flexibility, and thermal response performance of temperature sensors.

[0003] A thermistor temperature sensor is a temperature sensor that uses a thermistor core as its temperature sensing element, such as... Figure 1 As shown, a traditional thermistor temperature sensor includes a straight housing 2 and a thermistor core 3. The straight housing 2 can be cylindrical, cubic, or similar in shape. The thermistor core 3 is placed inside the cavity of the straight housing 2 and fixed with epoxy resin 4. The thermistor core 3 is connected to one end of two leads 5, and the other ends of the two leads 5 pass through corresponding through holes in the epoxy resin 4 and are located outside the straight housing 2. A mounting through hole 1 for mounting the temperature sensor is provided at one end of the straight housing 2 opposite to the leads. In use, the temperature sensor is mounted on the device whose temperature needs to be detected through the mounting through hole 1.

[0004] The aforementioned traditional thermistor temperature sensor has the following drawbacks: Since the mounting hole 1 is located at one end of the straight housing 2 and on the same plane, interference is easily generated during installation in confined spaces or irregularly shaped structures, affecting installation efficiency and even causing device damage; Because the mounting hole 1 is close to the thermistor core 3, external forces may damage the thermistor core 3 during installation and use, thus affecting measurement accuracy or causing failure; Furthermore, the insulating layer outside the thermistor core 3 is only the epoxy resin 4 placed inside the straight housing 2. Once the epoxy resin 4 cracks due to external forces, moisture can easily enter, affecting the performance of the thermistor core 3 and reducing detection accuracy; Moreover, the inner wall of the straight housing 2 is usually smooth. After the potting epoxy resin 4 cures, the mismatch in thermal expansion coefficients between it and the straight housing 2 can easily lead to gaps or detachment after temperature cycling, causing moisture intrusion and affecting the long-term stability and insulation performance of the sensor. Utility Model Content

[0005] The purpose of this invention is to provide an easy-to-install thermistor temperature sensor in order to solve the above-mentioned problems.

[0006] This utility model achieves the above objectives through the following technical solutions: An easy-to-install thermistor temperature sensor includes a housing and a thermistor core placed inside the housing. The thermistor core is coated with epoxy resin. One end of a lead is connected to the thermistor core, and the other end passes through a corresponding through hole in the epoxy resin and is placed outside the housing. The housing is formed by connecting a longitudinal housing and a transverse housing that together form an "L" shape. The thermistor core and the epoxy resin are both placed inside the cavity of the longitudinal housing, and the transverse housing is provided with mounting holes.

[0007] Preferably, to improve the reliability of the insulation encapsulation of the thermistor core, an inner insulating encapsulation material is provided between the thermistor core and the epoxy resin, which completely encapsulates the thermistor core, and the leads pass through corresponding through holes in the inner insulating encapsulation material. The specific material of the inner insulating encapsulation material depends on the needs, and can be, for example, silicone sealant, polyurethane, epoxy resin, etc.

[0008] Preferably, to prevent epoxy resin from falling off, the inner cavity wall surface of the longitudinal outer shell is a non-smooth surface.

[0009] Specifically, the inner cavity wall surface of the longitudinal outer shell is provided with threads, grooves or protrusions.

[0010] Preferably, for ease of application, the longitudinal shell and the transverse shell are integrally formed. The inner surface of the longitudinal shell near the transverse shell, the inner surface of the transverse shell near the longitudinal shell, and the outer surface of the transverse shell opposite to its inner surface are all planar. The lead wire is parallel to the inner surface of the longitudinal shell and perpendicular to the inner surface of the transverse shell.

[0011] The beneficial effects of this utility model are as follows: This invention employs an "L"-shaped outer shell, with the thermistor core and mounting holes located in the longitudinal and transverse outer shells respectively. This design facilitates installation in confined spaces or irregularly shaped structures, preventing device damage and improving installation efficiency. Furthermore, the greater distance between the thermistor core and mounting holes prevents damage to the thermistor core during installation and use due to external forces, ensuring the sensor's measurement accuracy remains unaffected. By adding an inner insulating encapsulant between the thermistor core and the epoxy resin, even if the outer epoxy resin cracks due to external forces, the inner insulating encapsulant protects the thermistor core, preventing performance degradation and reduced detection accuracy due to moisture immersion. Finally, threads are incorporated into the inner wall of the longitudinal outer shell, preventing gaps or detachment of the epoxy resin after temperature cycling, further protecting the thermistor core and contributing to the sensor's long-term stability and insulation performance. Attached Figure Description

[0012] Figure 1This is a schematic diagram of the structure of a traditional thermistor temperature sensor; Figure 2 This is a three-dimensional structural diagram of the easy-to-install thermistor temperature sensor described in this utility model; Figure 3 This is a schematic diagram of the main cross-sectional structure of the easy-to-install thermistor temperature sensor described in this utility model; Figure 4 This is a three-dimensional structural diagram of the housing of the easy-to-install thermistor temperature sensor described in this utility model. Detailed Implementation

[0013] The present invention will be further described below with reference to the accompanying drawings: like Figures 2-4 As shown, the easily installable thermistor temperature sensor of this utility model includes a housing 6 and a thermistor core 3 placed inside the housing 6. The thermistor core 3 is covered with epoxy resin 4. One end of the lead wire 5 is connected to the thermistor core 3, and the other end passes through the corresponding through hole of the epoxy resin 4 and is placed outside the housing 6. The housing 6 is formed by connecting a longitudinal housing 61 and a transverse housing 62 that together form an "L" shape. The thermistor core 3 and the epoxy resin 4 are both placed inside the cavity of the longitudinal housing 61, and the transverse housing 62 is provided with mounting holes 63. Note: The "longitudinal" of the longitudinal housing 61 and the "transverse" of the transverse housing 62 are not necessarily vertical and horizontal, but are used to indicate mutually perpendicular directions to form an "L" shape. The housing 6 is preferably made of a metal material with good thermal conductivity, such as brass, stainless steel, or aluminum alloy, so as to quickly respond to the temperature of the object being measured; in some specific applications, high-temperature resistant engineering plastics or ceramic materials can also be used.

[0014] like Figures 2-4 As shown, this utility model also discloses the following more optimized specific structures: To improve the reliability of the insulation encapsulation of the thermistor core 3, an inner insulating encapsulation material 7 is provided between the thermistor core 3 and the epoxy resin 4 to completely encapsulate the thermistor core 3, and the lead wire 5 passes through the corresponding through hole of the inner insulating encapsulation material 7.

[0015] To prevent the epoxy resin 4 from detaching, the inner cavity wall surface of the longitudinal outer shell 61 is a non-smooth surface. Specifically, the inner cavity wall surface of the longitudinal outer shell 61 is provided with threads 64, grooves, or protrusions, as shown in the figure, which is thread 64. The non-smooth surface in this product has a mechanical locking function for the epoxy resin 4, which can increase the bonding force between the epoxy resin 4 and the inner cavity wall of the longitudinal outer shell 61. Threads 64, annular or longitudinal grooves, knurled textures, irregular rough surfaces, etc., can all achieve similar technical effects.

[0016] For ease of application, the longitudinal shell 61 and the transverse shell 62 are integrally formed. The inner surface of the longitudinal shell 61 near the transverse shell 62, the inner surface of the transverse shell 62 near the longitudinal shell 61, and the outer surface of the transverse shell 62 opposite to its inner surface are all planar. The lead wire 5 is parallel to the inner surface of the longitudinal shell 61 and perpendicular to the inner surface of the transverse shell 62.

[0017] like Figures 2-4 As shown, in application, the outer casing 6 is installed on the equipment that needs to detect temperature through the mounting hole 63. Because the horizontal outer casing 62 is not on the same plane as the vertical outer casing 61 and the lead wire 5, it is convenient to install screws and other operations in a narrow space. Moreover, the installation position is far away from the thermistor core 3, which reduces the impact of vibration on the thermistor core 3. The double-layer insulation protection structure can also better ensure the long-term reliable operation of the thermistor core 3.

[0018] The above embodiments are merely preferred embodiments of this utility model and are not intended to limit the technical solutions of this utility model. Any technical solution that can be implemented based on the above embodiments without creative effort should be considered to fall within the scope of protection of this utility model patent.

Claims

1. A thermistor temperature sensor that is easy to install, comprising a housing and a thermistor core disposed within the housing, the thermistor core being coated with epoxy resin, one end of a lead being connected to the thermistor core, and the other end passing through a corresponding through-hole in the epoxy resin and disposed outside the housing, characterized in that: The outer shell is formed by connecting a longitudinal outer shell and a transverse outer shell that together form an "L" shape. The thermistor core and the epoxy resin are both placed inside the cavity of the longitudinal outer shell, and the transverse outer shell is provided with mounting holes.

2. The easily installable thermistor temperature sensor according to claim 1, characterized in that: An inner insulating encapsulation material is provided between the thermistor core and the epoxy resin to completely cover the thermistor core, and the lead wire passes through the corresponding through hole of the inner insulating encapsulation material.

3. The easily installable thermistor temperature sensor according to claim 1 or 2, characterized in that: The inner cavity wall surface of the longitudinal outer shell is a non-smooth surface.

4. The easily installable thermistor temperature sensor according to claim 3, characterized in that: The inner cavity wall surface of the longitudinal outer shell is provided with threads, grooves or protrusions.

5. The easily installable thermistor temperature sensor according to claim 1 or 2, characterized in that: The longitudinal shell and the transverse shell are integrally formed. The inner surface of the longitudinal shell near the transverse shell, the inner surface of the transverse shell near the longitudinal shell, and the outer surface of the transverse shell opposite to its inner surface are all planes. The lead wire is parallel to the inner surface of the longitudinal shell and perpendicular to the inner surface of the transverse shell.

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