CN111579110A - An insulating structure temperature sensor - Google Patents

Abstract

The invention discloses a temperature sensor with an insulating structure, comprising a temperature sensing cover, a heat-sensitive assembly, a fuse assembly, an insulating and heat-conducting casing provided with an opening on the bottom surface, and a mounting bracket matched with the insulating and heat-conducting casing; the heat-sensitive assembly and the fuse assembly It is arranged in the insulating and heat-conducting shell, the mounting bracket is installed on the opening of the insulating and heat-conducting shell, and the mounting bracket is used to fix the heat-sensitive component and the fuse component; the temperature-sensing cover is arranged on the On the top of the insulating and heat-conducting shell; through the above arrangement, while effectively avoiding the leakage of the product, the assembly structure and steps are simplified, the materials required for assembly are reduced, the production efficiency is improved, and the production cost is reduced.

Description

An insulating structure temperature sensor

technical field

The invention relates to the technical field of temperature control, in particular to a temperature sensor.

Background technique

At present, the rice cookers on the market usually use a temperature sensor to realize temperature detection, temperature control and over-temperature protection. The temperature sensor is usually set in the middle of the heater of the rice cooker, and the temperature sensing cover of the temperature sensor detects the temperature of the electric heating plate of the rice cooker and feeds back signals To the circuit board to achieve temperature control, when the temperature exceeds the melting temperature of the fuse, the fuse is disconnected to achieve over-temperature protection and stop the rice cooker.

Existing temperature sensors usually include temperature sensing covers, thermistors, fuses and hardware accessories. In order to avoid leakage of the temperature sensors, the thermistor and its connecting harness need to be welded or riveted through the insulating sleeve, and the fuse and its connection The wiring harness is set as above, and then the thermistor and the fuse are fixed on the lower end face of the temperature cover by riveting the hardware fittings and the temperature sensing cover. Finally, the ground wire needs to be welded or riveted on the hardware fittings to avoid internal leakage. The assembly process of the above temperature sensor is complicated and the materials are many, the production cost is high and the production efficiency is affected.

It can be seen that the existing technology still needs to be improved and improved.

SUMMARY OF THE INVENTION

In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a temperature sensor with an insulating structure, aiming at improving the structure of the temperature sensor under the condition of ensuring the insulating performance, reducing the production cost and improving the production efficiency.

In order to achieve the above object, the present invention has adopted the following technical solutions:

A temperature sensor with an insulating structure, comprising a temperature sensing cover, a heat-sensitive assembly, a fuse assembly, an insulating and heat-conducting casing provided with an opening on the bottom surface, and a mounting bracket matched with the insulating and heat-conducting casing; the heat-sensitive assembly and the fuse assembly are arranged on the In the insulating and heat-conducting shell, the mounting bracket is installed on the opening of the insulating and heat-conducting shell, and the mounting bracket is used to fix the heat-sensitive component and the fuse assembly; the temperature-sensing cover is arranged on the insulating and heat-conducting shell on top of the body.

The temperature sensor of the insulating structure, wherein the middle part of the mounting bracket is provided with a first positioning seat for fixing the thermal component, and the two sides of the first positioning seat are symmetrically provided with a second positioning seat for fixing the fuse assembly ; The middle part of the bottom surface of the insulating and heat-conducting shell is provided with a first installation groove that cooperates with the first positioning seat, and the two sides of the first installation groove are symmetrically provided with a second installation groove that cooperates with the second positioning seat The first positioning seat is inserted into the first installation slot to fix the thermal component, and the second positioning seat is inserted into the second installation slot to fix the fuse assembly.

In the temperature sensor of the insulating structure, snap holes are arranged on both sides of the lower part of the insulating heat-conducting shell, and snaps matched with the snap holes are arranged on both sides of the lower part of the mounting bracket.

The temperature sensor of the insulating structure, wherein the thermal component includes a thermistor and a first connecting wire, the two ends of the thermistor are connected to one end of the first connecting wire respectively, and the two terminals are connected to one end of the first connecting wire respectively. The other end of the first connecting line is connected to a connector.

In the temperature sensor of the insulating structure, the top of the first positioning seat is provided with a first positioning groove which is matched with the thermistor.

The temperature sensor of the insulating structure, wherein the fuse assembly includes a fuse and a second connection wire, the two ends of the fuse are connected to one end of the second connection wire, and the other end of the second connection wire is connected. One end is provided with a connection terminal.

In the temperature sensor of the insulating structure, the top of the second positioning seat is provided with a second positioning groove which is matched with the fuse.

The temperature sensor of the insulating structure, wherein the temperature sensing cover comprises a top surface, a first cylindrical section, a second cylindrical section and a bottom plate; the top surface is connected with the upper end of the first cylindrical section, and the first cylindrical section is The lower end of a cylindrical segment is connected to the upper end of the second cylindrical segment through a ring segment, and the lower end of the second cylindrical segment is connected to the bottom plate; the top of the insulating and heat-conducting shell is connected to the top surface lower end connection.

The temperature sensor of the insulating structure further comprises a spring, the upper end of the spring is connected with the lower end surface of the annular segment, and the spring is arranged on the outer side of the insulating and heat-conducting housing.

In the temperature sensor of the insulating structure, guide ears are arranged on both sides of the bottom plate, and guide holes are arranged on the guide ears.

Beneficial effects:

The present invention provides a temperature sensor with an insulating structure. Compared with the prior art, an insulating heat-conducting shell and a mounting bracket are provided to replace the insulating sleeve and hardware fittings of the prior art. The heat-sensitive component and the fuse component can be fixed by installing the mounting bracket on the insulating and heat-conducting shell, simplifying the assembly structure and assembly steps, reducing the materials required for assembly, greatly improving the production efficiency and reducing the production cost; The thermal components and fuse components are insulated on three sides in the insulating heat-conducting shell to avoid leakage due to contact with the temperature-sensing cover, and there is no need to install the ground wire, which ensures the safety of the product and further reduces the materials required for assembly.

Description of drawings

FIG. 1 is a schematic structural diagram of a temperature sensor with an insulating structure according to the present invention.

FIG. 2 is a schematic structural diagram of the insulating and heat-conducting housing according to the present invention.

FIG. 3 is a schematic structural diagram of the temperature sensing cover according to the present invention.

Description of main component symbols: 10-temperature cover, 11-top surface, 12-first cylinder segment, 13-ring segment, 14-second cylinder segment, 15-bottom plate, 16-guide lug, 17-guide Hole, 20-thermal component, 21-thermistor, 22-first connecting wire, 23-connector, 30-fuse assembly, 31-fuse, 32-second connecting wire, 33-connecting terminal, 40-insulation Heat conduction shell, 41-first installation slot, 42-second installation slot, 43-card hole, 44-guide slope, 50-installation bracket, 51-first positioning seat, 52-second positioning seat, 53-card Buckle, 54-first positioning groove, 55-second positioning groove, 60-spring.

Detailed ways

The present invention provides a temperature sensor with an insulating structure. In order to make the purpose, technical solutions and effects of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; it can be a mechanical connection, an electrical connection or can communicate with each other; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal communication of two elements or the interaction of two elements relation. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

Referring to FIGS. 1-3 , the present invention provides a temperature sensor with an insulating structure, including a temperature sensing cover 10 , a thermal component 20 , a fuse component 30 , an insulating and thermally conductive housing 40 with an opening on the bottom surface, and a Mounting bracket 50; the thermal component 20 and the fuse component 30 are arranged in the insulating and thermally conductive housing 40, the mounting bracket 50 is mounted on the opening of the insulating thermally conductive housing 40, and the mounting bracket 50 is used for The heat-sensitive assembly 20 and the fuse assembly 30 are fixed; the temperature-sensitive cover 10 is covered on the top of the insulating and heat-conducting housing 40 . In addition, the lower end of the temperature sensing cover 10 can also be connected with a spring 60, the spring 60 is arranged around the outer side of the insulating and heat-conducting housing 40, and the spring 60 is used to be installed on the heater of the electric cooker.

It should be noted that the temperature sensing cover 10 is integrally formed with a metal with good thermal conductivity, such as stainless steel, and the insulating and thermally conductive housing 40 is made of a material with good insulation and thermal conductivity, such as ceramics.

In application, the temperature sensor of the insulating structure is generally installed in the middle of the heater of the rice cooker. When the rice cooker starts to heat up, the heat of the electric heating plate will be transferred to the insulating heat-conducting shell 40 through the temperature-sensing cover 10, so that the heat-sensitive component 20 can be heated. The temperature of the electric heating plate is accurately detected, and the temperature information is fed back to the circuit board of the rice cooker to control the power and heating time of the heater, so as to ensure that the cooked food is delicious. Due to the direct contact between the temperature sensing cover 10 and the insulating and thermally conductive housing 40, the heat conduction effect is better, and the thermal component 20 and the fuse component 30 can sense the temperature of the electric heating plate more accurately. The reaction time of the fuse assembly 30 is effectively shortened, the fuse assembly 30 is immediately fused and the power is cut off, heating is stopped, and the use safety of the electric rice cooker is improved. In addition, compared with the prior art, the structure of the temperature sensor with insulating structure is that the thermal component 20 and the fuse component 30 are put into the insulating and heat-conducting housing 40, and then the mounting bracket 50 is installed into the insulating and heat-conducting housing 40 to realize the thermal component. 20 and the fuse assembly 30 are fixed, and the assembly is simple; and the heat-sensitive assembly 20/fuse assembly 30 and the temperature-sensing cover 10 are directly separated by the insulating heat-conducting shell 40, so as to realize the isolation of three sides, and there is no need to use multiple insulating sleeves. On the heat-sensitive assembly 20 and the fuse assembly 30; in addition, because the insulating and heat-conducting housing 40 itself has excellent insulation performance, there is no need to install the ground wire, the above arrangement effectively avoids the leakage of the product, and at the same time simplifies the assembly structure and assembly steps. required materials, improve production efficiency and reduce production costs.

Referring to FIG. 2 , in some embodiments, the middle of the mounting bracket 50 is provided with a first positioning seat 51 for fixing the thermal component 20 , and two sides of the first positioning seat 51 are symmetrically provided for fixing the fuse The second positioning seat 52 of the assembly 30; the middle of the bottom surface of the insulating and heat-conducting housing 40 is provided with a first installation groove 41 that cooperates with the first positioning seat 51, and the two sides of the first installation groove 41 are symmetrically provided with The second mounting slot 42 matched with the second positioning seat 52; the first positioning seat 51 is inserted into the first mounting slot 41 to fix the thermal component 20, the second positioning seat 52 Inserted into the second installation slot 42 to fix the fuse assembly 30 . Through the above arrangement, the heat-sensitive assembly 20 and the fuse assembly 30 are separated from each other and fixed in the insulating and heat-conducting housing 40, so as to avoid the contact and short circuit between the heat-sensitive assembly 20 and the fuse assembly 30. In addition, there are two fuse assemblies 30, even if there are If one fuse assembly 30 fails, the other fuse assembly 30 can also ensure effective overheating protection and improve product reliability.

In some embodiments, the two sides of the lower part of the insulating and thermally conductive shell 40 are provided with snap holes 43, and the two sides of the lower part of the mounting bracket 50 are provided with snaps 53 matched with the snap holes 43; The quick snap-fit assembly between the body 40 and the mounting bracket 50 improves the assembly efficiency.

Further, in some embodiments, one side of the clip hole 43 in the direction in which the clip 53 is installed is set as a guide inclined surface 44, and the guide slope 44 is inclined in the direction in which the clip 53 is installed, so that The clip 53 is inserted into the clip hole 43 to play a guiding role.

In some embodiments, the thermal component 20 includes a thermistor 21 and a first connecting wire 22, two ends of the thermistor 21 are connected to one end of the first connecting wire 22 respectively, and the two The other end of the first connecting wire 22 is connected to a connector 23, so as to lead out the pins of the thermistor 21, which is convenient for connecting to other devices. Further, the top of the first positioning seat 51 is provided with a first positioning groove 54 that cooperates with the thermistor 21 . In the insulating and heat-conducting housing 40, the quality of assembly is improved, and the structure of the product is more stable.

Similar to the above, in some embodiments, the fuse assembly 30 includes a fuse 31 and a second connecting wire 32, and two ends of the fuse 31 are connected to one end of a second connecting wire 32, so The other end of the second connecting wire 32 is provided with a connecting terminal 33 so as to lead out the pins of the fuse 31 . Further, the top of the second positioning seat 52 is provided with a second positioning groove 55 that cooperates with the fuse 31. The fuse 31 is first placed on the mounting bracket 50 for positioning, and then inserted into the insulating and heat-conducting housing 40 to improve the assembly performance. quality, so that the structure of the product is more stable.

In addition, in some cases, in order to facilitate the extraction of the pins of the thermistor 21 and the fuse 31 or to facilitate the installation of the device into the insulating and thermally conductive housing 40, the pins of the thermistor 21 and the fuse 31 are bent downwards. at a 90-degree angle. In order to prevent the first connection wire 22 and the second connection wire 32 from being scattered, the first connection wire and the second connection wire 32 may be bundled by a cable tie.

Referring to FIG. 3 , in some embodiments, the temperature sensing cover 10 includes a top surface 11 , a first cylindrical section 12 , a second cylindrical section 14 and a bottom plate 15 ; the top surface 11 and the first cylindrical section The upper end of the segment 12 is connected, the lower end of the first cylindrical segment 12 is connected to the upper end of the second cylindrical segment 14 through the ring segment 13 , and the lower end of the second cylindrical segment 14 is connected to the bottom plate 15 ; The top of the insulating and thermally conductive housing 40 is connected to the lower end surface of the top surface 11 , and the connection between the insulating and thermally conductive housing 40 and the top surface 11 can be riveted, welded, or the like.

In some embodiments, the temperature sensor of the insulating structure further includes a spring 60 , the upper end of the spring 60 is connected to the lower end surface of the annular segment 13 , and the spring 60 is arranged on the insulating and heat-conducting housing 40 . outside, so as to avoid interference between the spring 60 and the insulating and heat-conducting housing 40 . During assembly, the insulating structure temperature sensor is installed in the rice cooker through the spring 60. When the rice cooker is filled with something, the heating plate of the rice cooker is pressed down by overcoming the elastic force of the spring 60 under the action of gravity, and the circuit board in the rice cooker will receive to the corresponding signal to allow the rice cooker to perform the heating action.

Further, in some embodiments, guide ears 16 are provided on both sides of the bottom plate 15, and guide holes 17 are provided on the guide ears 16. By arranging the guide ears 16 and the guide holes 17, the temperature of the insulating structure is increased. When the sensor is installed on the electric cooker through the spring 60 , it can cooperate with the guide fittings on the electric cooker to make the heating plate of the electric cooker move vertically under the support of the spring 60 .

It can be understood that, for those of ordinary skill in the art, equivalent replacements or changes can be made according to the technical solutions and inventive concepts of the present invention, and all these changes or replacements should belong to the protection scope of the present invention.

Claims (10)

1. A temperature sensor with an insulating structure, characterized in that it comprises a temperature-sensing cover, a heat-sensitive assembly, a fuse assembly, an insulating heat-conducting housing provided with an opening on the bottom surface and a mounting bracket matched with the insulating and heat-conducting housing; the heat-sensitive assembly and The fuse assembly is arranged in the insulating and heat-conducting shell, the mounting bracket is installed on the opening of the insulating and heat-conducting shell, and the mounting bracket is used to fix the heat-sensitive assembly and the fuse assembly; the temperature-sensing cover is provided with on top of the insulating thermally conductive housing. 2 . The temperature sensor of an insulating structure according to claim 1 , wherein the middle part of the mounting bracket is provided with a first positioning seat for fixing the thermal component, and two sides of the first positioning seat are symmetrically provided with A second positioning seat for fixing the fuse assembly; a first installation slot matched with the first positioning seat is opened in the middle of the bottom surface of the insulating and heat-conducting shell, and two sides of the first installation slot are symmetrically arranged with the first installation slot. A second installation groove in which two positioning bases are matched; the first positioning base is inserted into the first installation groove to fix the thermal component, and the second positioning base is inserted into the second installation groove to fix the fuse assembly. 3 . The temperature sensor of an insulating structure according to claim 2 , wherein the two sides of the lower part of the insulating heat-conducting shell are provided with clamping holes, and the two sides of the lower part of the mounting bracket are provided with buckles matched with the clamping holes. 4 . . 4 . The temperature sensor of an insulating structure according to claim 2 , wherein the thermal component comprises a thermistor and a first connecting wire, and two ends of the thermistor are respectively connected to one of the first connecting wires. 5 . One end of the connecting line and the other end of the two first connecting lines are connected to a connector. 5 . The temperature sensor of the insulating structure according to claim 4 , wherein the top of the first positioning seat is provided with a first positioning groove which is matched with the thermistor. 6 . 6 . The temperature sensor of an insulating structure according to claim 2 , wherein the fuse assembly comprises a fuse and a second connection wire, and two ends of the fuse are connected to one end of the second connection wire respectively, 7 . The other end of the second connection wire is provided with a connection terminal. 7 . The temperature sensor of an insulating structure according to claim 6 , wherein the top of the second positioning seat is provided with a second positioning groove which is matched with the fuse. 8 . 8 . The temperature sensor of an insulating structure according to claim 1 , wherein the temperature sensing cover comprises a top surface, a first cylindrical section, a second cylindrical section and a bottom plate; the top surface is connected to the first cylindrical section. 9 . The upper end of the first cylindrical section is connected with the upper end of the second cylindrical section through the ring section, and the lower end of the second cylindrical section is connected with the bottom plate; the insulating and heat-conducting shell The top of the body is connected to the lower end surface of the top surface. 9 . The temperature sensor of an insulating structure according to claim 8 , further comprising a spring, the upper end of the spring is connected with the lower end surface of the annular segment, and the spring is arranged on the insulating and heat-conducting housing. 10 . outside. 10 . The temperature sensor of an insulating structure according to claim 9 , wherein guide ears are arranged on both sides of the bottom plate, and guide holes are arranged on the guide ears. 11 .

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