Easily detachable temperature sensor

Abstract

The utility model relates to a temperature sensor easy to disassemble, which comprises a resistor element, two leads arranged at one end of the resistor element, an insulation device surrounding the leads, a protection device wrapping the insulation device and the resistor element, and a shell arranged outside the protection device, and the insulation device comprises a first insulation cover and a second insulation cover. One side of the first insulating cover is provided with a rotating part, one side of the second insulating cover is rotationally connected with the rotating part, the first insulating cover and the second insulating cover are provided with a first protruding part and a second protruding part respectively, and when the insulating device is closed, the first protruding part and the second protruding part abut against each other and are located between the two leads; the first protective cover and the second protective cover are detachably connected. The two insulating covers are rotated to enable the first protruding part and the second protruding part to be separated or abut against each other, disassembly and assembly are achieved, replacement or maintenance is convenient, insulation is formed between the two lead wires when the first protruding part and the second protruding part abut against each other, and short circuit caused by contact of the two lead wires is avoided.

Description

Technical Field

[0001] The utility model relates to the field of sensors, and particularly to a temperature sensor that is easy to disassemble. Background Art

[0002] A temperature sensor refers to a sensor that can sense temperature changes and convert them into available output electrical signals, and is the core component of a temperature measuring instrument. Temperature sensors are often used as monitoring tools inside the casings of household appliances such as ovens, air fryers, steam ovens, etc., and are long-term applied in environments with high temperature, high humidity, and frequent alternation of high and low temperatures. Therefore, the temperature sensors used in this field need to have some characteristics such as waterproof and high temperature resistance.

[0003] When current passes through the lead wires of the temperature sensor, due to the short distance between the two lead wires, it is easy to cause a short circuit between the two lead wires, and the current cannot pass through the resistor. Therefore, the sensor cannot achieve the induction function. For this, in traditional temperature sensors, an insulating resin sleeve is wrapped around the outside of each lead wire. However, the existing temperature sensors are prone to thermal stress in a long-term high-temperature and frequently alternating high and low temperature environment, and there is a risk of damaging the internal lead wires or resistors. Therefore, it is necessary to regularly check or replace and repair them, and the traditional insulating resin sleeve is difficult to disassemble, which is extremely inconvenient during later replacement or maintenance. Summary of the Utility Model

[0004] One of the purposes of the present utility model is to provide a temperature sensor that can be quickly disassembled to solve the technical problem of inconvenient disassembly and assembly of sensors in the prior art.

[0005] In order to achieve the above purpose, the technical solution adopted by the present utility model is as follows:

[0006] An easily detachable temperature sensor includes a resistance element, two lead wires installed at one end of the resistance element, a signal transmission device installed at the end of the lead wires far from the resistance element, an insulating device surrounding the lead wires, a protection device wrapping the insulating device and the resistance element, and a housing installed outside the protection device. The insulating device includes a first insulating cover and a second insulating cover. A rotating part is provided on one side of the first insulating cover, and one side of the second insulating cover is rotatably connected to the rotating part. First protruding parts and second protruding parts are respectively provided on the first insulating cover and the second insulating cover. When the insulating device is closed, one end of the first protruding part and one end of the second protruding part are abutted against each other and are located between the two lead wires. The protection device includes a first protection cover and a second protection cover, and the first protection cover and the second protection cover are detachably connected.

[0007] In the above technical solution, the resistance element of the temperature sensor detects the change in the ambient temperature, and its own resistance value will change accordingly. The current passing through this resistance will change, and the change in the ambient temperature can be reflected through the change in the current, thus realizing the conversion of the temperature change into a corresponding electrical signal, achieving signal acquisition. The electrical signal is transmitted to an external signal receiving device through the lead and the signal transmission device, realizing signal transmission. The insulating device surrounds the lead. The insulating property of the insulating device can prevent the lead from contacting the housing and causing a short circuit, and at the same time can play a role in supporting and protecting the lead. The first convex part and the second convex part are in contact with each other and are located between the two leads, preventing the two leads from directly contacting and causing a short circuit, which may lead to the current not passing through the resistance element, making the temperature sensor unable to collect signals. The first insulating cover and the second insulating cover are rotatably connected. When the insulating device needs to be disassembled, the two insulating covers can be rotated to separate the first convex part and the second convex part, so as to take out the insulating device. When installing, just install one of the insulating covers on the lead, then rotate the other insulating cover until the first convex part and the second convex part are in contact with each other, and install the installed insulating device into any protective cover, and then cover the other protective cover and install the whole into the housing, thus realizing the installation of the sensor. The design of the insulating device and the protective device is convenient for disassembly and assembly, facilitating the replacement or repair of the resistance element or the lead in the later stage. The protective device and the housing encapsulate the whole resistance element and the lead, increasing the overall waterproof and high-temperature resistance performance of the temperature sensor.

[0008] Preferably, an installation part is provided on one side of the first insulating cover where no rotating part is provided, and a buckle is provided on the second insulating cover. The buckle is installed in the installation part to fix the second insulating cover on the first insulating cover. When the buckle is installed in the installation part, the fixation between the first insulating cover and the second insulating cover can be realized, making the two insulating covers fit more closely, with better waterproof performance. At the same time, the first convex part and the second convex part are in closer contact with each other, with better insulating performance.

[0009] Preferably, the buckle includes an elastic piece and a clamping part installed on the elastic piece. When the elastic piece is installed in the installation part, the clamping part abuts against the outer wall of the first insulating cover. When disassembling the insulating device, press the clamping part to deform the elastic piece, and the buckle disengages from the installation part. At this time, the fixation between the first insulating cover and the second insulating cover is lost, and the first insulating cover and the second insulating cover can be rotated to separate them, so as to take out the insulating device from the lead. When installing, just install one of the insulating covers, rotate the other insulating cover until the first convex part and the second convex part are in contact with each other, press the clamping part to make the buckle fit into the installation part and release the hand, so that the clamping part abuts against the outer wall of the second insulating cover, realizing the installation of the insulating device. This design makes the installation of the insulating device more convenient and improves the speed of disassembly and assembly.

[0010] Preferably, a plurality of jacks are provided on the first protective cover, and plug posts equal in number to and corresponding to the jacks are provided on the second protective cover, and the plug posts are installed in the jacks. The interference fit between the plug posts and the jacks enables the first protective cover and the second protective cover to be closely connected, encapsulating the insulating device and the lead wires, and providing better waterproof performance.

[0011] Preferably, the protective device is made of heat-shrinkable material, and a waterproof sleeve is wrapped around the plug posts. The heat-shrinkable material can shrink when heated, making the fit between the first protective cover and the second protective cover closer and providing better encapsulation of the insulating device, thus having better waterproof performance. After cooling, the heat-shrinkable material will return to its original size, facilitating the disassembly between the first protective cover and the second protective cover, with better convenience. The waterproof sleeve wrapped around the plug posts prevents water from seeping in through the gap between the jacks and the plug posts, providing better waterproof performance.

[0012] Preferably, a reinforcing member is further included, and the reinforcing member is used to connect the two lead wires and strengthen the fixation between the two lead wires. The reinforcing member can keep the two lead wires at a certain distance, avoiding short circuit caused by the contact between the two lead wires. At the same time, when the two lead wires are deformed by heat or the resistor element is manually pulled during the installation process, the stress points are dispersed to the reinforcing member, preventing damage to the resistor element, thereby avoiding abnormal resistance values and deviation of the sensor sensing results.

[0013] Preferably, the reinforcing member is a glass shell, and the glass shell wraps a part of the two lead wires. The glass shell has high stiffness and insulation and can withstand the force of deformation and pulling between the lead wires.

[0014] Preferably, a protruding ring protruding towards the inner cavity direction is provided on the outer shell, and the protruding ring abuts against the outer surface of the protective device. The protruding ring can have an interference fit with the protective device, making the contact between the outer shell and the protective device closer and providing better waterproof performance.

[0015] Preferably, a fixing device is further included, and the fixing device is installed on the outer shell. The fixing device is used to fix the outer shell on an external fixture, ensuring the stability of the temperature sensor, avoiding errors in the sensing results caused by changes in the sensed object due to the movement of the sensor, and having better accuracy.

[0016] Preferably, the signal transmission device includes a signal connection line, a connector connected to one end of the signal connection line, a copper strip connector, and an insulating sleeve wrapped around the outside of the signal connection line. The signal connection line is fixedly connected to one end of each of the two leads, and the copper strip connector covers the connection between the signal connection line and the two leads. The signal connection line can transmit an electrical signal to the connector, and the connector is used to connect to an external signal receiving device. The copper strip connector wraps more tightly around its connection with the two leads, has better stability, and can reduce damage to the sensor element caused by the instantaneous high heat generated during the welding process.

[0017] Advantages of the present utility model: The insulating device is divided into a first insulating cover and a second insulating cover. A rotating part is provided on one side of the insulating cover, and one side of the second insulating cover is rotatably connected to the rotating part. The protection device is divided into a first protection cover and a second protection cover, and the first protection cover and the second protection cover are detachably connected. By rotating the two insulating covers to separate or abut the first protruding part and the second protruding part, disassembly or installation can be achieved. The insulating device and the protection device of this temperature sensor are convenient to disassemble and assemble, facilitating later replacement or repair of the resistance element or the leads. At the same time, when the first protruding part and the second protruding part abut, insulation will be formed between the two leads, preventing the two leads from contacting each other and causing a short circuit, thereby avoiding induction errors. Description of the Drawings

[0018] Figure 1 is a schematic structural diagram of a temperature sensor with easy disassembly according to the present utility model;

[0019] Figure 2 is an exploded view of a temperature sensor with easy disassembly according to the present utility model;

[0020] Figure 3 is Figure 2 a partial enlarged view of position A of

[0021] Figure 4 is Figure 3 a partial enlarged view of position B of

[0022] Figure 5 is a schematic structural diagram of the first protection cover of a temperature sensor with easy disassembly according to the present utility model;

[0023] Figure 6 is a schematic structural diagram of the second protection cover of a temperature sensor with easy disassembly according to the present utility model.

[0024] Among them, 1. Resistance element; 2. Lead wire; 3. Insulating device; 301. First insulating cover; 3011. Rotating part; 3012. First convex part; 3013. Mounting part; 302. Second insulating cover; 3021. Buckle; 3022. Elastic piece; 3023. Engaging part; 3024. Second convex part; 4. Protection device; 401. First protection cover; 4011. Jack; 402. Second protection cover; 4021. Plug post; 5. Outer shell; 501. Convex ring; 7. Fixing device; 6. Signal transmission device; 601. Signal connection wire; 602. Connector; 603. Insulating sleeve; 604. Connecting piece; 8. Reinforcing piece. Detailed implementation manners

[0025] The following will illustrate the implementation manners of the present utility model with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. The present utility model can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present utility model. It should be understood that the preferred embodiments are only for illustrating the present utility model, rather than for limiting the protection scope of the present utility model.

[0026] It should be noted that the illustrations provided in the following embodiments only schematically illustrate the basic concept of the present utility model. Therefore, only the components related to the present utility model are shown in the drawings, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and ratio of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0027] Embodiment 1

[0028] As Figures 1-6Shown is Embodiment 1 of a detachable temperature sensor, including a resistance element 1, two leads 2 installed at one end of the resistance element 1, an insulating device 3 surrounding the leads 2, a protection device 4 wrapping the insulating device 3 and the resistance element 1, and a housing 5 installed outside the protection device 4. In this embodiment, the housing 5 is made of stainless steel, having excellent strength and stiffness, and high corrosion resistance, and can effectively resist corrosion under high temperature and high humidity conditions. The insulating device 3 is made of polyphenylene sulfide, having high temperature resistance, excellent mechanical strength and thermal stability. The protection device 4 is made of a heat-shrinkable material, which can shrink when heated. The insulating device 3 includes a first insulating cover 301 and a second insulating cover 302. Two rotating parts 3011 are provided on one side of the first insulating cover 301. The second insulating cover 302 is hinge-connected to the rotating parts 3011. First protruding parts 3012 and second protruding parts 3024 are respectively provided on the first insulating cover 301 and the second insulating cover 302. When the insulating device 3 is closed, one end of the first protruding part 3012 and one end of the second protruding part 3024 are in contact and located between the two leads 2. Two mounting parts 3013 close to the end of the insulating device 3 are provided on the side of the first insulating cover 301 where the rotating parts 3011 are not provided. In this embodiment, the mounting parts 3013 are provided on the side of the first insulating cover 301 opposite to the rotating parts 3011. In addition, they can also be provided at other positions on the first insulating cover 301. The mounting parts 3013 are rectangular through holes. Two buckles 3021 corresponding to the positions of the mounting parts 3013 are provided on the second insulating cover 302. Each buckle 3021 includes an elastic piece 3022 and a clamping part 3023 installed on the elastic piece 3022. Each buckle 3021 is provided with two clamping parts 3023 and the clamping parts 3023 bend in opposite directions relative to the elastic piece 3022. When the elastic piece 3022 is installed in the mounting part 3013, the clamping part 3023 abuts against the outer wall of the first insulating cover 301. A plurality of jacks 4011 are provided on the first protection cover 401. A number of plug posts 4021 equal to and corresponding to the number of the jacks 4011 are provided on the second protection cover 402. The plug posts 4021 are wrapped with waterproof sleeves. The plug posts 4021 are installed in the jacks 4011. The interference fit between the plug posts 4021 and the jacks 4011 enables the first protection cover 401 and the second protection cover 402 to be closely connected to enclose the insulating device 3 and the leads 2.

[0029] Specifically, the resistance element 1 of the temperature sensor detects changes in the ambient temperature, and its own resistance value will change accordingly. The current passing through this resistor will change, and the change in the current can reflect the change in the ambient temperature, thereby realizing the conversion of the temperature change into a corresponding electrical signal, achieving signal acquisition. The electrical signal is transmitted to an external signal receiving end through the lead 2 and the signal transmission device 6, realizing signal transmission. The insulating device 3 surrounds the lead 2. The insulating property of the insulating device 3 can prevent the lead 2 from contacting the housing and causing a short circuit, and at the same time can play a role in supporting and protecting the lead 2. The first protrusion 3012 and the second protrusion 3024 are in contact with each other and are located between the two leads 2, preventing the two leads 2 from directly contacting and causing a short circuit, which may lead to the current being unable to pass through the resistance element 1, making the temperature sensor unable to collect signals. The first insulating cover 301 and the second insulating cover 302 are rotatably connected. When the insulating device 3 needs to be disassembled, the engaging portion 3023 can be pressed, causing the elastic piece 3022 to deform, and the buckle 3021 to disengage from the mounting portion 3013. At this time, the first insulating cover 301 and the second insulating cover 302 lose their fixation, and the first insulating cover 301 and the second insulating cover 302 can be rotated to separate them, so as to remove the insulating device 3 from the lead 2. When installing, only one of the insulating covers needs to be installed between the two leads and clamped by the clamping force of the two leads, then the other insulating cover is rotated and the engaging portion 3023 is pressed so that the buckle 3021 is inserted into the mounting portion 3013 and the hand is released, causing the engaging portion 3023 to abut against the outer wall of the second insulating cover 302, realizing the installation of the insulating device 3. The installed insulating device 3 is attached to the first protective cover 401, and then the jack 4011 of the second protective cover 402 is aligned with the plug post 4021 of the first protective cover 401 and installed, realizing the installation of the protective device 4. Then the installed part is installed into the housing 5, thus realizing the installation of the entire sensor. When the sensor is in a heated state, the protective device 4 made of heat-shrinkable material will shrink when heated, making the combination of the protective device 4 and the insulating device 3 tighter, and at the same time making the first protective cover 401 and the second protective cover 402 fit more tightly, with better waterproof performance. When the sensor cools down, the protective device 4 will return to its original shape. At this time, the first protective cover 401 and the second protective cover 402 fit more loosely than when heated, which is convenient for disassembly and assembly. The plug post 4021 is wrapped with a waterproof sleeve to prevent water from seeping in through the gap between the jack and the plug post, with better waterproof performance.

[0030] Advantages of this embodiment: The insulating device 3 is divided into a first insulating cover 301 and a second insulating cover 302. A rotating part 3011 is provided on one side of the insulating cover, and one side of the second insulating cover 302 is rotatably connected to the rotating part 3011. By rotating the two insulating covers, the cooperation or separation of the buckle 3021 and the mounting part 3013 can be achieved to realize installation or disassembly. At the same time, when the first convex part 3012 and the second convex part 3024 are in contact with each other, insulation will be formed between the two leads 2, avoiding the two leads 2 from contacting each other and causing a short circuit, which may lead to induction errors. The insulating device 3 of this temperature sensor is easy to disassemble and assemble, facilitating the replacement or repair of the resistance element 1 or the lead 2 in the later stage. The protection device 4 is divided into a first protection cover 401 and a second protection cover 402. The first protection cover 401 and the second protection cover 402 are matched through the insertion post 4021 and the jack 4011, which is more convenient for disassembly and assembly. The protection device 4 is made of heat-shrinkable material, with better waterproof performance. A waterproof sleeve is provided on the insertion post 4021 to prevent water from seeping into the gap between the jack 4011 and the insertion post 4021, and the waterproof performance is better.

[0031] Embodiment 2

[0032] As Figure 3 Shown in the embodiment 2 of an easily detachable temperature sensor, the difference from Embodiment 1 is that it further includes a reinforcing member 8. The reinforcing member 8 is used to connect the two leads 2 and strengthen the fixation between the two leads 2. In this embodiment, the reinforcing member 8 is a glass shell. In addition, the reinforcing member 8 can also be other materials with high rigidity and insulation, or a combination of high-rigidity materials and insulation materials. The glass shell wraps a part of the two leads 2. The glass shell has insulating properties and high rigidity. On the one hand, it can keep the two leads 2 at a certain distance, avoiding short circuits caused by the two leads 2 contacting each other, which may lead to errors in the induction results. On the other hand, when the two leads 2 are heated and deformed to pull the resistance element 1, the stress points are dispersed to the glass shell, avoiding damage to the resistance element 1, which may lead to abnormal resistance values and deviations in the sensor induction results.

[0033] The remaining features and technical effects of this embodiment are the same as those of Embodiment 1.

[0034] Embodiment 3

[0035] As Figures 1-4Embodiment 3 of a detachable temperature sensor shown. The difference from Embodiment 1 and Embodiment 2 is that a raised ring 501 protruding towards its inner cavity is provided on the outer shell 5, and the raised ring 501 abuts against the outer surface of the protection device 4. The raised ring 501 can have an interference fit with the protection device 4, making the contact between the outer shell 5 and the protection device 4 closer and having better waterproof performance. It also includes a fixing device 7. In this embodiment, the fixing device 7 is a flange fixing piece. The fixing device 7 is installed on the outer shell 5 and is used to fix the outer shell 5 on an external fixture, ensuring the stability of the temperature sensor and avoiding errors in the sensing result caused by a change in the sensed object due to the movement of the sensor, with better accuracy. The signal transmission device 6 includes a signal connection wire 601, a connector 602 connected to one end of the signal connection wire 601, a copper strip connecting piece 604, and an insulating sleeve 603 wrapped around the outside of the signal connection wire 601. The signal connection wire 601 is fixedly connected to one end of each of the two leads 2 respectively, and the copper strip connecting piece 604 covers the connection between the signal connection wire 601 and the two leads 2. In this embodiment, the insulating sleeve 603 is double-layered and made of a high-temperature resistant material to avoid the influence of high temperature on the signal connection wire. The signal connection wire 601 can transmit an electrical signal to the connector 602. The connector 602 is used to connect to an external signal receiving device. The copper strip connecting piece 604 wraps more tightly around its connection with the two leads 2, with better stability, and at the same time can reduce the damage to the sensor element caused by the instantaneous high heat generated during the welding process.

[0036] The remaining features and technical effects of this embodiment are the same as those of Embodiment 1 and Embodiment 2.

[0037] The above embodiments are only preferred embodiments given to fully illustrate the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or transformations made by those skilled in the art on the basis of the present invention are all within the protection scope of the present invention.

Claims

1. An easily detachable temperature sensor, comprising a resistance element (1), two lead wires (2) mounted at one end of the resistance element (1), an insulating device (3) surrounding the lead wires (2), a protective device (4) wrapping the insulating device (3) and the resistance element (1), and a housing (5) mounted outside the protective device (4), characterized in that: The insulating device (3) comprises a first insulating cover (301) and a second insulating cover (302); a rotating portion (3011) is provided on one side of the first insulating cover (301); a second insulating cover (302) is rotatably connected to the rotating portion (3011); a first protruding portion (3012) and a second protruding portion (3024) are provided on the first insulating cover (301) and the second insulating cover (302), respectively; when the insulating device (3) is closed, one end of the first protruding portion (3012) and one end of the second protruding portion (3024) are in contact with each other and are located between the two lead wires (2); the protective device (4) comprises a first protective cover (401) and a second protective cover (402); the first protective cover (401) and the second protective cover (402) are detachably connected.

2. The easily detachable temperature sensor according to claim 1, characterized in that: A mounting portion (3013) is provided on the side of the first insulating cover (301) where the rotating portion (3011) is not provided, and a buckle (3021) is provided on the second insulating cover (302), wherein the buckle (3021) is installed in the mounting portion (3013) to fix the second insulating cover (302) on the first insulating cover (301).

3. The easily detachable temperature sensor according to claim 2, characterized in that: The buckle (3021) comprises an elastic sheet (3022) and a snap-fitting portion (3023) mounted on the elastic sheet (3022); when the elastic sheet (3022) is mounted in the mounting portion (3013), the snap-fitting portion (3023) abuts against the outer wall of the first insulating cover (301).

4. The easily detachable temperature sensor according to claim 1, characterized in that: The first protective cover (401) is provided with a plurality of plug holes (4011), and the second protective cover (402) is provided with a number of plug posts (4021) that is equal to and corresponds to the number of the plug holes (4011), and the plug posts (4021) are installed in the plug holes (4011).

5. The easily detachable temperature sensor according to claim 4, characterized in that: The plug post (4021) is wrapped with a waterproof cover.

6. The easily detachable temperature sensor according to claim 1, characterized in that: It also comprises a reinforcing member (8), wherein the reinforcing member (8) is used to connect the two lead wires (2) and strengthen the fixation between the two lead wires (2).

7. The easily detachable temperature sensor according to claim 6, characterized in that: The reinforcing member (8) is a glass shell, and the glass shell wraps a portion of the two lead wires (2).

8. The easily detachable temperature sensor according to claim 1, characterized in that: The outer shell (5) is provided with a raised ring (501) that protrudes toward the inner cavity thereof, and the raised ring (501) abuts against the outer surface of the protective device (4).

9. The easily detachable temperature sensor according to claim 1, characterized in that: It also comprises a fixing device (7), wherein the fixing device (7) is mounted on the outer shell (5), and the fixing device (7) is used to fix the outer shell (5) on an external fixing object.

10. The easily detachable temperature sensor according to claim 1, characterized in that: It also includes a signal transmission device (6) installed on one end of the lead wire (2) away from the resistor element (1), the signal transmission device (6) including a signal connection wire (601), a connector (602) connected to one end of the signal connection wire (601), a connecting piece (604) and an insulating sleeve (603) wrapped around the outside of the signal connection wire (601), the signal connection wire (601) is fixedly connected to one end of the two lead wires (2) respectively, and the connecting piece (604) covers the connection between the signal connection wire (601) and the two lead wires (2).

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