A temperature sensor with insulating structure

Abstract

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

Description

Technical Field

[0001] The present invention relates to the technical field of temperature control, and in particular to a temperature sensor. Background Art

[0002] At present, electric rice cookers on the market usually use temperature sensors to achieve temperature detection, temperature control and over-temperature protection. The temperature sensor is usually arranged in the middle of the heater of the electric rice cooker. The temperature sensing cover of the temperature sensor detects the temperature of the electric heating plate of the electric rice cooker and feeds back the signal 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 from working.

[0003] Existing temperature sensors usually include a temperature sensing cover, a thermistor, a fuse and hardware accessories. To prevent leakage of the temperature sensor, the thermistor and its connecting wire harness need to pass through an insulating sleeve and then be welded or riveted. The fuse and its connecting wire harness are set as above, and then the thermistor and the fuse are fixed to the lower end surface of the temperature sensing cover through riveting with hardware accessories. Finally, the ground wire needs to be welded or riveted on the hardware accessories to avoid internal leakage. The assembly process of the above temperature sensor is complicated and has many materials, high production cost and affects production efficiency.

[0004] It can be seen that the existing technology still needs to be improved and enhanced. Summary of the invention

[0005] In view of the above-mentioned deficiencies in the prior art, an object of the present invention is to provide an insulating structure temperature sensor, aiming to improve the structure of the temperature sensor while ensuring the insulation performance, reduce the production cost and improve the production efficiency.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] An insulating structure temperature sensor comprises a temperature sensing cover, a thermistor assembly, a fuse assembly, an insulating heat-conductive shell with an opening on the bottom surface, and a mounting bracket matched with the insulating heat-conductive shell; the thermistor assembly and the fuse assembly are arranged in the insulating heat-conductive shell, the mounting bracket is installed on the opening of the insulating heat-conductive shell, and the mounting bracket is used to fix the thermistor assembly and the fuse assembly; the temperature sensing cover is arranged on the top of the insulating heat-conductive shell.

[0008] The insulating structure temperature sensor, wherein a first positioning seat for fixing the thermistor component is provided in the middle of the mounting bracket, and second positioning seats for fixing the fuse component are symmetrically provided on both sides of the first positioning seat; a first mounting groove cooperating with the first positioning seat is opened in the middle of the bottom surface of the insulating heat-conductive shell, and second mounting grooves cooperating with the second positioning seat are symmetrically provided on both sides of the first mounting groove; the first positioning seat is inserted into the first mounting groove to fix the thermistor component, and the second positioning seat is inserted into the second mounting groove to fix the fuse component.

[0009] The insulating structure temperature sensor, wherein the lower sides of the insulating heat-conducting shell are provided with clamping holes, and the lower sides of the mounting bracket are provided with buckles matching with the clamping holes.

[0010] The insulating structure temperature sensor, wherein the thermal component includes a thermistor and a first connecting wire, the two end pins of the thermistor are respectively connected to one end of the first connecting wire, and the other ends of the two first connecting wires are connected to a connector.

[0011] The insulating structure temperature sensor, wherein the top of the first positioning seat is provided with a first positioning groove matched with the thermistor.

[0012] The insulating structure temperature sensor, wherein the fuse assembly includes a fuse and a second connecting wire, the two end pins of the fuse are respectively connected to one end of the second connecting wire, and the other end of the second connecting wire is provided with a connecting terminal.

[0013] The insulating structure temperature sensor, wherein the top of the second positioning seat is provided with a second positioning groove matched with the fuse.

[0014] The insulating structure temperature sensor, wherein the temperature sensing cover includes a top surface, a first cylindrical section, a second cylindrical section and a bottom plate; the top surface is connected to the upper end of the first cylindrical section, the lower end of the first cylindrical section is connected to the upper end of the second cylindrical section through a circular ring section, and the lower end of the second cylindrical section is connected to the bottom plate; the top of the insulating heat-conductive shell is connected to the lower end surface of the top surface.

[0015] The insulating structure temperature sensor further comprises a spring, the upper end of the spring is connected to the lower end surface of the annular segment, and the spring is arranged on the outside of the insulating heat-conducting shell.

[0016] The insulating structure temperature sensor, wherein guide ears are provided on both sides of the bottom plate, and guide holes are provided on the guide ears.

[0017] Beneficial effects:

[0018] The present invention provides an insulating structure temperature sensor. Compared with the prior art, an insulating heat-conducting shell and a mounting bracket are provided to replace the insulating sleeve and hardware accessories of the prior art, a thermistor component and a fuse component are placed in the insulating heat-conducting shell, and the mounting bracket is installed on the insulating heat-conducting shell to fix the thermistor component and the fuse component, thereby simplifying the assembly structure and assembly steps, reducing the materials required for assembly, greatly improving production efficiency, and reducing production costs; at the same time, the thermistor component and the fuse component are arranged in the insulating heat-conducting shell to achieve three-sided insulation, thereby avoiding contact with a temperature sensing cover and leakage, and there is no need to install a ground wire, thereby ensuring the safety of the product and further reducing the materials required for assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The present invention is a schematic structural diagram of an insulating structure temperature sensor.

[0020] Figure 2 It is a schematic structural diagram of the insulating heat-conducting housing of the present invention.

[0021] Figure 3 It is a schematic structural diagram of the temperature sensing cover of the present invention.

[0022] Description of the main component symbols: 10-temperature sensing cover, 11-top surface, 12-first cylindrical section, 13-annular section, 14-second cylindrical section, 15-bottom plate, 16-guide ear, 17-guide hole, 20-thermal component, 21-thermistor, 22-first connecting wire, 23-connector, 30-fuse component, 31-fuse, 32-second connecting wire, 33-connecting terminal, 40-insulating heat-conducting shell, 41-first mounting groove, 42-second mounting groove, 43-card hole, 44-guide slope, 50-mounting bracket, 51-first positioning seat, 52-second positioning seat, 53-clip, 54-first positioning groove, 55-second positioning groove, 60-spring. DETAILED DESCRIPTION

[0023] The present invention provides an insulating structure temperature sensor. In order to make the purpose, technical solution and effect of the present invention clearer and more specific, the present invention is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the present invention and are not used to limit the scope of protection of the present invention.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] See also Figure 1-3 The present invention provides an insulating structure temperature sensor, comprising a temperature sensing cover 10, a thermistor assembly 20, a fuse assembly 30, an insulating heat-conducting housing 40 with an opening on the bottom surface, and a mounting bracket 50 matched with the insulating heat-conducting housing 40; the thermistor assembly 20 and the fuse assembly 30 are arranged in the insulating heat-conducting housing 40, the mounting bracket 50 is installed on the opening of the insulating heat-conducting housing 40, and the mounting bracket 50 is used to fix the thermistor assembly 20 and the fuse assembly 30; the temperature sensing cover 10 is covered on the top of the insulating heat-conducting housing 40. In addition, the lower end of the temperature sensing cover 10 can also be connected to a spring 60, the spring 60 is arranged around the outside of the insulating heat-conducting housing 40, and the spring 60 is used to be installed in the heater of the rice cooker.

[0026] It should be noted that the temperature sensing cover 10 is integrally formed by metal processing with good thermal conductivity, such as stainless steel, and the insulating heat-conducting shell 40 is made of a material with good insulation and thermal conductivity, such as ceramic.

[0027] In application, the insulating structure temperature sensor is generally installed in the middle of the electric rice cooker heater. When the electric rice cooker starts heating, the heat of the electric heating plate will be transferred to the insulating heat-conducting housing 40 through the temperature-sensing cover 10, so that the thermistor component 20 can accurately detect the temperature of the electric heating plate, and feedback the temperature information to the circuit board of the electric 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 heat-conducting housing 40, the heat conduction effect is better, and the thermistor component 20 and the fuse component 30 can more accurately sense the temperature of the electric heating plate. Therefore, when overheating occurs, the reaction time of the fuse component 30 can be effectively shortened, and the fuse component 30 will immediately melt and cut off the power, stop heating, and improve the safety of the electric rice cooker. In addition, compared with the prior art, the structure of the insulating structure temperature sensor is that the thermistor component 20 and the fuse component 30 are placed in the insulating heat-conductive shell 40, and then the mounting bracket 50 is installed into the insulating heat-conductive shell 40 to fix the thermistor component 20 and the fuse component 30, and the assembly is simple; and the insulating heat-conductive shell 40 is directly used to separate the thermistor component 20 / fuse component 30 from the temperature sensing cover 10 to achieve three-sided insulation, without the need to use multiple insulating sleeves to be sleeved on the thermistor component 20 and the fuse component 30; in addition, since the insulating heat-conductive shell 40 itself has excellent insulation performance, there is no need to install a ground wire. The above arrangement effectively avoids leakage of the product while simplifying the assembly structure and assembly steps, reducing the materials required for assembly, improving production efficiency, and reducing production costs.

[0028] See also Figure 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 the two sides of the first positioning seat 51 are symmetrically provided with second positioning seats 52 for fixing the fuse component 30; the middle of the bottom surface of the insulating heat-conducting housing 40 is provided with a first mounting groove 41 that matches the first positioning seat 51, and the two sides of the first mounting groove 41 are symmetrically provided with second mounting grooves 42 that match the second positioning seat 52; the first positioning seat 51 is inserted into the first mounting groove 41 to fix the thermal component 20, and the second positioning seat 52 is inserted into the second mounting groove 42 to fix the fuse component 30. Through the above arrangement, the thermal component 20 and the fuse component 30 are separated and fixed from each other in the insulating heat-conducting housing 40 to avoid short circuit caused by contact between the thermal component 20 and the fuse component 30. In addition, there are two fuse components 30. Even if one fuse component 30 fails, the other fuse component 30 can ensure the effectiveness of heating over-temperature protection, thereby improving the reliability of the product.

[0029] In some embodiments, the insulating heat-conducting shell 40 is provided with card holes 43 on both sides of the lower part, and the mounting bracket 50 is provided with buckles 53 that cooperate with the card holes 43 on both sides of the lower part; thereby realizing the quick card connection assembly between the insulating heat-conducting shell 40 and the mounting bracket 50, thereby improving the assembly efficiency.

[0030] Furthermore, in some embodiments, a side surface of the latch hole 43 in the direction in which the buckle 53 is inserted is provided as a guide slope 44, and the guide slope 44 is inclined in the direction in which the buckle 53 is inserted, so as to facilitate the insertion of the buckle 53 into the latch hole 43 and play a guiding role.

[0031] In some embodiments, the thermistor assembly 20 includes a thermistor 21 and a first connecting wire 22, the two end pins of the thermistor 21 are respectively connected to one end of the first connecting wire 22, and the other ends of the two first connecting wires 22 are connected to a connector 23, thereby leading out the pins of the thermistor 21, which is convenient for connecting other devices. Furthermore, the top of the first positioning seat 51 is provided with a first positioning groove 54 that matches the thermistor 21, and the thermistor 21 can be placed on the mounting bracket 50 to achieve positioning, and then inserted into the insulating heat-conducting housing 40 with the mounting bracket 50, thereby improving the quality of assembly and making the product structure more stable.

[0032] Similar to the above, in some embodiments, the fuse assembly 30 includes a fuse 31 and a second connecting wire 32, the two end pins of the fuse 31 are respectively connected to one end of the second connecting wire 32, and the other end of the second connecting wire 32 is provided with a connecting terminal 33, thereby leading out the pins of the fuse 31. Furthermore, the top of the second positioning seat 52 is provided with a second positioning groove 55 that matches the fuse 31. The fuse 31 is first placed on the mounting bracket 50 for positioning, and then inserted into the insulating heat-conducting housing 40, so as to improve the quality of assembly and make the structure of the product more stable.

[0033] Additionally, in some cases, the pins of thermistor 21 and fuse 31 are bent downward at a 90-degree angle to facilitate the extraction of the pins of thermistor 21 and fuse 31 or to facilitate the installation of the devices into the insulating heat-conducting housing 40. To prevent the first connection wire 22 and the second connection wire 32 from being scattered, the first connection wire 22 and the second connection wire 32 can be tied up by a cable tie.

[0034] See also Figure 3In some embodiments, the temperature sensing cover 10 includes a top surface 11, a first cylindrical segment 12, a second cylindrical segment 14 and a bottom plate 15; the top surface 11 is connected to the upper end of the first cylindrical segment 12, the lower end of the first cylindrical segment 12 is connected to the upper end of the second cylindrical segment 14 through the annular segment 13, and the lower end of the second cylindrical segment 14 is connected to the bottom plate 15; the top of the insulating heat-conducting shell 40 is connected to the lower end surface of the top surface 11, and the insulating heat-conducting shell 40 and the top surface 11 can be connected by riveting, welding, etc.

[0035] In some embodiments, the insulating structure temperature sensor 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 disposed outside the insulating heat-conducting housing 40, thereby avoiding interference between the spring 60 and the insulating heat-conducting housing 40. During assembly, the insulating structure temperature sensor is installed in the rice cooker through the spring 60. When something is placed in the rice cooker, 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 receives a corresponding signal to allow the rice cooker to perform a heating action.

[0036] Furthermore, 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 providing the guide ears 16 and the guide holes 17, when the insulating structure temperature sensor is installed on the rice cooker through the spring 60, it can cooperate with the guide accessories on the rice cooker to make the heating plate of the rice cooker move vertically under the support of the spring 60.

[0037] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of the present invention, and all these changes or substitutions should fall within the protection scope of the present invention.

Claims

1. An insulating structure temperature sensor, characterized in that: The invention comprises a temperature-sensing cover, a thermistor assembly, a fuse assembly, an insulating heat-conducting shell with an opening on the bottom surface, and a mounting bracket matched with the insulating heat-conducting shell; the thermistor assembly and the fuse assembly are arranged in the insulating heat-conducting shell, the mounting bracket is installed on the opening of the insulating heat-conducting shell, and the mounting bracket is used to fix the thermistor assembly and the fuse assembly; the temperature-sensing cover is arranged on the top of the insulating heat-conducting shell; a first positioning seat for fixing the thermistor assembly is arranged in the middle of the mounting bracket, and second positioning seats for fixing the fuse assembly are symmetrically arranged on both sides of the first positioning seat; a second positioning seat for fixing the fuse assembly is opened in the middle of the bottom surface of the insulating heat-conducting shell, which is matched with the first positioning seat. A first mounting groove matched with a positioning seat, and second mounting grooves matched with the second positioning seat are symmetrically arranged on both sides of the first mounting groove; the first positioning seat is inserted in the first mounting groove to fix the thermistor component, and the second positioning seat is inserted in the second mounting groove to fix the fuse component; the temperature sensing cover includes a top surface, a first cylindrical section, a second cylindrical section and a bottom plate; the top surface is connected to the upper end of the first cylindrical section, the lower end of the first cylindrical section is connected to the upper end of the second cylindrical section through a circular ring section, and the lower end of the second cylindrical section is connected to the bottom plate; the top of the insulating heat-conductive shell is connected to the lower end surface of the top surface.

2. The insulation structure temperature sensor according to claim 1, characterized in that: Clamping holes are arranged on both sides of the lower part of the insulating heat-conducting shell, and buckles cooperating with the clamping holes are arranged on both sides of the lower part of the mounting bracket.

3. The insulation structure temperature sensor according to claim 1, characterized in that: The thermistor assembly includes a thermistor and a first connecting wire. The two end pins of the thermistor are respectively connected to one end of one of the first connecting wires, and the other ends of the two first connecting wires are connected to a connector.

4. The insulation structure temperature sensor according to claim 3, characterized in that: A first positioning groove matched with the thermistor is arranged on the top of the first positioning seat.

5. The insulation structure temperature sensor according to claim 1, characterized in that: The fuse assembly comprises a fuse and a second connecting line. The two end pins of the fuse are respectively connected to one end of the second connecting line, and the other end of the second connecting line is provided with a connecting terminal.

6. The insulation structure temperature sensor according to claim 5, characterized in that: A second positioning groove matched with the fuse is arranged on the top of the second positioning seat.

7. The insulation structure temperature sensor according to claim 1, characterized in that: It also includes a spring, the upper end of which is connected to the lower end surface of the circular ring segment, and the spring is arranged on the outside of the insulating heat-conducting shell.

8. The insulation structure temperature sensor according to claim 7, characterized in that: Guide ears are arranged on both sides of the bottom plate, and guide holes are arranged on the guide ears.

Images