CN218885192U

CN218885192U - Temperature sensor

Info

Publication number: CN218885192U
Application number: CN202222670930.0U
Authority: CN
Inventors: 江政; 江杰; 徐礼吉
Original assignee: Anhui Yunhao Internet Of Things Technology Co ltd
Current assignee: Anhui Yunhao Internet Of Things Technology Co ltd
Priority date: 2022-10-11
Filing date: 2022-10-11
Publication date: 2023-04-18
Anticipated expiration: 2032-10-11

Abstract

The utility model relates to a temperature sensor belongs to sensor technical field. The water-swelling type water-stop connector comprises a connector, a sleeve, a connecting piece, heat-conducting resin, a thermosensitive element, an overvoltage protector, a fixing block, a water-swelling water-stop ring, a hanging device and a protective sleeve; the connector comprises a plug and a terminal; the thermal sensitive element comprises a thermal resistor and a resistor lead, the thermal resistor is arranged at the bottom end inside the sleeve, the sleeve is filled with heat conducting resin, one end of the resistor lead is connected with the thermal resistor, the other end of the resistor lead is correspondingly connected with the terminal, the terminal and the resistor lead are both provided with a fixed block, the plug is fixedly connected with the sleeve through a connecting piece, and the joints of the plug and the connecting piece and the sleeve and the port of the connecting piece are both provided with water swelling water stop rings; the overvoltage protector is arranged in the connector. The utility model discloses effectively solved sensor terminal or lead wire because of touching the short circuit mutually, by the inside problem of wire transient state large voltage scaling loss, water infiltration sensor.

Description

Temperature sensor

Technical Field

The utility model relates to a sensor technology field especially relates to a temperature sensor.

Background

The temperature sensor is a sensor capable of sensing temperature and converting the temperature into an output signal, and generally comprises a thermosensitive element and a connector, because the power of the thermosensitive element is relatively low, in actual use, the temperature sensor may be burnt by transient large voltage due to generation of transient large voltage on a lead, and the accuracy of temperature measurement is influenced. In addition, due to the limitation of the size of the temperature sensor, the distance between the terminal and the resistor lead which are assembled inside is relatively short, and the terminal and the resistor lead are easy to touch to cause short circuit. Most of the thermosensitive elements are encapsulated in the sleeve by resin, so that most of the temperature sensors are not considered to be waterproof, but the temperature sensors are used as electronic components, if the environment humidity of the temperature sensors is too high, a large amount of water media are doped in the air, and once the water media permeate into the temperature sensors, the temperature sensors are likely to fail. For the perception temperature that thermistor can be better, the sleeve pipe sets up the one end design of thermistor and can relatively laminate thermistor, and the diameter can be narrower, receives the striking and breaks in the transportation easily.

SUMMERY OF THE UTILITY MODEL

To defect and not enough problem among the prior art, the utility model provides a temperature sensor has solved sensor terminal or lead wire because of touching the short circuit mutually, by the inside problem of wire transient state large voltage scaling loss, water infiltration sensor.

The utility model provides a technical scheme that its technical problem adopted is:

a temperature sensor comprises a connector, a sleeve, a connecting piece, heat-conducting resin, a thermosensitive element, an overvoltage protector, a fixing block, a water-swelling water stop ring, a hanging device and a protective sleeve; the connector comprises 2 plugs and terminals, wherein one end of each terminal is fixed with the plug, and the other end of each terminal extends into the sleeve; the thermistor comprises a thermistor and 2 resistance leads, the thermistor is arranged at the bottom end in the sleeve, the distance from the inner wall of the bottom end of the sleeve is 2mm, the sleeve is filled with heat-conducting resin, one end of each resistance lead is connected with the thermistor, and the other end of each resistance lead is correspondingly connected with a terminal extending into the sleeve; the terminal and the resistance lead are provided with fixed blocks, the plug is fixedly connected with the sleeve through a connecting piece, and water swelling water stop rings are arranged at the joint of the plug and the connecting piece and the joint of the sleeve and the connecting piece; the overvoltage protector is welded between the two terminals and is connected with the two resistance leads in parallel; the hanging device is arranged inside the sleeve, and the protective sleeve is hung with the hanging device.

Furthermore, all parallel arrangement between 2 terminals, between 2 resistance lead wires, resistance lead wire connecting terminal's one end sets up the bend downwards.

Furthermore, the fixed block respectively fixes the terminal and the resistance lead in an injection molding mode.

Further, the overvoltage protector is a piezoresistor.

Furthermore, sleeve pipe inside is equipped with 2 inward recesses, is located thermistor's upper end, and the recess is closed, and the size matches with push rod, peg length, and 2 recesses are along sleeve pipe center pin symmetry setting.

Furthermore, the hanging device comprises a spring, a hanging plate, a push rod and a hanging rod; the spring sets up inside the recess, one end fixed connection in recess back wall, one end fixedly connected with link plate, link plate and the corresponding other terminal surface fixedly connected with push rod of spring tie point, the push rod lower extreme is equipped with a peg and link plate fixed connection, push rod, peg all run through in the sleeve pipe lateral wall.

Furthermore, the protective sheath lateral wall sets up 2 trompils along the center pin correspondence, and trompil position and size correspond with the peg, and the protective sheath diameter is greater than the sheathed tube diameter that hooking device corresponds, is less than the distance between the outer extreme point of two pegs under the spring quiescent condition.

Furthermore, the diameter of the water-swelling water stop ring is smaller than the diameter of the port of the connecting piece and larger than the diameter of the plug and the sleeve corresponding to the connecting part.

Further, the heat conducting resin covers the connection point of the terminal and the resistance lead.

The utility model discloses following beneficial effect has: first, the utility model discloses a set up the fixed block and fix terminal and resistance lead wire, avoid causing the short circuit because of the touching is in the same place. The piezoresistor overvoltage protector is arranged in the temperature sensor, and by utilizing the nonlinear characteristic of the piezoresistor, when overvoltage appears between two electrodes of the piezoresistor, the piezoresistor can be broken down to be in a short-circuit state, so that the voltage of the two electrodes is clamped to a relatively fixed voltage value, a certain protection effect is exerted on the temperature sensor, the temperature sensor is prevented from being burnt by transient large voltage generated by a contact wire in actual use, temperature measurement is inaccurate, and the transient large voltage resistance and the temperature measurement reliability of the temperature sensor are improved. Water swelling water stop rings are arranged at the joints of the plug and the connecting piece and the joints of the sleeve and the connecting piece, and the thermistor is encapsulated in the sleeve by heat-conducting resin, so that water vapor in the external environment is effectively prevented from permeating into the temperature sensor, and the waterproof performance of the temperature sensor is improved. For the perception temperature that thermistor can be better, the sleeve pipe sets up thermistor's one end can be relatively laminated, and the diameter can be relatively narrow, receives the striking easily in the transportation and rolls over and decreases, the utility model discloses when temperature sensor transports, through protective sheath lateral wall trompil and the hanging rod articulate to fix the protective sheath at the sleeve pipe periphery that thermistor corresponds, protection thermistor.

Drawings

1-connector assembly, 111-plug, 112-terminal, 2-connecting piece, 3-sleeve, 31-thermistor, 32-resistance lead, 4-hooking device, 41-spring, 42-push rod, 43-hanging rod, 44-hanging plate, 5-protective sleeve, 6-water swelling water stop ring, 7-overvoltage protector, 8-fixing block and 9-heat conducting resin;

fig. 1 is a front view of the present invention;

FIG. 2 is a schematic view of the internal structure of the present invention;

fig. 3 is an enlarged schematic view of a in fig. 2.

Detailed Description

The following describes in detail embodiments of the present invention with reference to the accompanying drawings.

As shown in fig. 1 to 3, a temperature sensor includes a connector 1, a sleeve 3, a connector 2, a heat-conducting resin 9, a heat-sensitive element, an overvoltage protector 7, a fixing block 8, a water-swelling water stop ring 6, a hanging device 4, and a protective sleeve 5; the connector 1 comprises a

plug

111 and 2 terminals 112, wherein 2 terminals 112 are arranged, one end of each terminal 112 is connected with the plug 111, and the other end of each terminal 112 extends into the sleeve 3, so that in order to avoid short circuit between the two terminals 112 due to contact, a fixing block 8 is arranged in the middle of each terminal 112 in an injection molding mode to fix the 2 terminals 112; the joint of the plug 111 and the connecting piece 2 and the joint of the sleeve 3 and the connecting piece 2 are provided with the water-swelling water-stopping ring 6, the diameter of the water-swelling water-stopping ring 6 is smaller than the diameter of the port of the connecting piece 2 and larger than the diameters of the plug 111 and the sleeve 3 corresponding to the joint of the connecting piece 2, so that water vapor in the external environment is effectively prevented from permeating into the temperature sensor, and the waterproof performance of the temperature sensor is improved; the thermosensitive element comprises a thermistor 31 and a resistor lead 32, the thermistor 31 is arranged at the bottom end inside the sleeve 3, the distance between the thermistor 31 and the inner wall of the bottom end of the sleeve is 2mm, and the heat-conducting resin 9 is filled inside the sleeve 3; the resistance lead 32 is 2, one end is connected with the thermistor 31, the other end is correspondingly connected with 2 terminals 112 extending into the sleeve 3, the diameter of the terminal 112 is larger than that of the resistance lead 32, in order to connect the resistance lead 32 with the terminal 112 in parallel and reduce the space of the sleeve 3, one end of the connection terminal 112 of the resistance lead 32 is bent downwards, the distance between the terminal 112 and the resistance lead 32 between the bends is large, the resistance lead 32 is difficult to touch even if the resistance lead 32 is deformed at the position, the distance between the resistance lead 32 connected with one end of the thermistor 31 is small, in order to prevent the 2 resistance leads 32 from touching each other and generating short circuit, a fixed block 8 is arranged at the lower end of the bend in an injection molding mode to fix the resistance lead 32; the overvoltage protector 7 is a varistor, welded between the two terminals 112, and connected in parallel with the two resistor leads 32. The varistor is a voltage-limiting type protection device. By utilizing the nonlinear characteristic of the piezoresistor, when overvoltage appears between two electrodes of the piezoresistor, the piezoresistor can be broken down to present a short circuit state, so that the voltage of the two electrodes is clamped to a relatively fixed voltage value, the protection of the temperature sensor is realized, the burning loss of a thermosensitive element under the impact of transient large voltage is avoided, and the capacity of resisting the transient large voltage of the temperature sensor is improved. The upper end of the sleeve 3, which is provided with the thermistor 31, is provided with 2 inward grooves which are symmetrically arranged along the central axis of the sleeve 3, and the hanging device 4 comprises a spring 41, a hanging plate 44, a push rod 42 and a hanging rod 43; spring 41 sets up inside the recess, and one end fixed connection is in the recess back wall, one end fixedly connected with link plate 44, and link plate 44 and the corresponding another terminal surface fixedly connected with push rod 42 of spring 41 tie point, and the push rod 42 lower extreme is equipped with a peg 43 and link plate 44 fixed connection, and push rod 42, peg 43 all run through the sleeve pipe 3 lateral wall. The lateral wall of the protective sleeve 5 is correspondingly provided with 2 holes along the central shaft, the positions and the sizes of the holes correspond to the hanging rods 43, and the diameter of the protective sleeve 5 is larger than that of the sleeve 3 corresponding to the hanging device 4 and smaller than the distance between the outer end points of the two hanging rods 43 in the static state of the spring 41. When the temperature sensor is transported, the protective sleeve 5 is fixed on the periphery of the sleeve 3 corresponding to the thermistor 31 through the hanging connection of the hanging rod 43 and the opening on the side wall of the protective sleeve 5, and when the temperature sensor is used, the spring 41 is pushed by the push rod 42 to be compressed inwards to drive the hanging rod 43 to be pushed inwards, so that the protective sleeve 5 is taken down.

The working principle is as follows: the socket connector comprises a plug and 2 terminals, and in order to avoid short circuit caused by the fact that the 2 terminals are touched together, a fixing block is arranged to fix the 2 terminals; the sleeve is connected with the plug through the connecting piece, the joint of the plug and the connecting piece and the joint of the sleeve and the port of the connecting piece are provided with the water-swelling water-stopping ring, and the diameter of the water-swelling water-stopping ring is smaller than the diameter of the port of the connecting piece and larger than the diameter of the plug and the sleeve corresponding to the joint of the connecting piece, so that water vapor in the external environment is prevented from permeating into the temperature sensor. The thermistor includes thermistor and resistance lead wire, thermistor set up in the inside bottom of cover pipe, the intraductal heat conduction resin that fills of cover, the resistance lead wire is 2, and every one end is connected with thermistor, and the other end corresponds respectively with 2 terminals that extend to the cover intraductal and is connected, in order to prevent that 2 resistance lead wires from touching each other and taking place the short circuit, sets up the fixed block through injection moulding's mode and fixes. The overvoltage protector is a piezoresistor, is welded between the two terminals and is connected with the two resistor leads in parallel. When an overvoltage appears between the two electrodes of the voltage dependent resistor, the voltage dependent resistor is broken down to be in a short circuit state, so that the voltage of the two electrodes is clamped to a relatively fixed voltage value, and the circuit is protected. When the temperature sensor is transported, the protective sleeve is fixed on the periphery of the sleeve corresponding to the thermistor through the opening of the side wall of the protective sleeve and the hanging of the hanging rod, and when the temperature sensor is used in work, the spring is pushed to be compressed inwards through the push rod to drive the hanging rod to be pushed inwards, so that the protective sleeve is taken down.

The utility model discloses following beneficial effect has: first, the utility model discloses a set up the fixed block and fix terminal and resistance lead wire, avoid causing the short circuit because of the touching is in the same place. The piezoresistor overvoltage protector is arranged in the temperature sensor, and by utilizing the nonlinear characteristic of the piezoresistor, when an overvoltage appears between two poles of the piezoresistor, the piezoresistor can be broken down to present a short-circuit state, so that the voltage of the two poles is clamped to a relatively fixed voltage value, a certain protection effect is exerted on the temperature sensor, the temperature sensor is prevented from being burnt by transient large voltage generated by a contact wire in actual use, the temperature measurement is inaccurate, and the transient large voltage resistance of the temperature sensor and the reliability of the temperature measurement are improved. Water swelling water stop rings are arranged at the joints of the plug and the connecting piece and the joints of the sleeve and the connecting piece, and the thermistor is encapsulated in the sleeve by heat-conducting resin, so that water vapor in the external environment is effectively prevented from permeating into the temperature sensor, and the waterproof performance of the temperature sensor is improved. For the perception temperature that thermistor can be better, the sleeve pipe sets up thermistor's one end can be relatively laminated, and the diameter can be relatively narrow, receives the striking easily in the transportation and rolls over and decreases, the utility model discloses when temperature sensor transports, through protective sheath lateral wall trompil and the hanging rod articulate to fix the protective sheath at the sleeve pipe periphery that thermistor corresponds, protection thermistor.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. The present invention is not limited to the above embodiments, and the description in the above embodiments and the description is only to illustrate the principle of the present invention, and the present invention will have various changes and improvements without departing from the spirit and scope of the present invention, and these changes and improvements all fall into the scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A temperature sensor, characterized by: the water-swelling type water-stop connector comprises a connector, a sleeve, a connecting piece, heat-conducting resin, a thermosensitive element, an overvoltage protector, a fixing block, a water-swelling water-stop ring, a hanging device and a protective sleeve; the connector comprises 2 plugs and terminals, wherein one end of each terminal is fixed with the plug, and the other end of each terminal extends into the sleeve; the thermistor comprises a thermistor and 2 resistance leads, the thermistor is arranged at the bottom end in the sleeve, the distance from the inner wall of the bottom end of the sleeve is 2mm, the sleeve is filled with heat-conducting resin, one end of each resistance lead is connected with the thermistor, and the other end of each resistance lead is correspondingly connected with a terminal extending into the sleeve; the terminal and the resistance lead are provided with fixed blocks, the plug is fixedly connected with the sleeve through a connecting piece, and water swelling water stop rings are arranged at the joint of the plug and the connecting piece and the joint of the sleeve and the connecting piece; the overvoltage protector is welded between the two terminals and is connected with the two resistance leads in parallel; the hanging device is arranged inside the sleeve, and the protective sleeve is hung with the hanging device.

2. A temperature sensor according to claim 1, wherein: all parallel arrangement between 2 terminals, between 2 resistance lead wires, resistance lead wire connecting terminal's one end sets up the bend downwards.

3. A temperature sensor according to claim 1, wherein: the fixing block is used for fixing the terminal and the resistor lead respectively in an injection molding mode.

4. A temperature sensor according to claim 1, wherein: the overvoltage protector is a piezoresistor.

5. A temperature sensor according to claim 1, wherein: the inside recess that is equipped with 2 inwards of sleeve pipe is located thermistor's upper end, and the recess is closed, and the size matches with push rod, peg length, and 2 recesses are along sleeve pipe center pin symmetry settings.

6. A temperature sensor according to claim 1, wherein: the hanging device comprises a spring, a hanging plate, a push rod and a hanging rod; the spring sets up inside the recess, and one end fixed connection is in the recess back wall, one end fixedly connected with link plate, and link plate and the corresponding another terminal surface fixedly connected with push rod of spring tie point, push rod lower extreme are equipped with a peg and link plate fixed connection, and push rod, peg all run through in the sleeve pipe lateral wall.

7. A temperature sensor according to claim 1, wherein: the protective sheath lateral wall sets up 2 trompils along the center pin correspondence, and trompil position and size correspond with the peg, and the protective sheath diameter is greater than the sheathed tube diameter that hooking device corresponds, is less than the distance between the outer extreme point of two pegs under the spring quiescent condition.

8. A temperature sensor according to claim 1, wherein: the diameter of the water swelling water stop ring is smaller than the diameter of the port of the connecting piece and larger than the diameter of the plug and the sleeve corresponding to the joint of the connecting piece.

9. A temperature sensor according to claim 1, wherein: the heat-conducting resin covers the connecting point of the terminal and the resistance lead.