Waterproof NTC temperature measurement sensor

Abstract

The utility model discloses a waterproof NTC temperature measurement sensor, which relates to the technical field of NTC temperature measurement sensors and comprises a sensor body, a test rod is mounted on one side of the sensor body, a casing is in threaded connection with the other side of the sensor body, a thermistor is mounted in the sensor body, and the thermistor is in threaded connection with the casing. A connecting groove is formed in the other side of the thermistor, and a supporting plate is slidably connected to the inner wall of the machine shell. By adopting the structure, due to the existence of the sealing ring, the sealing ring can effectively seal the connecting point between the casing and the sensor body, so that a water source can be prevented from flowing into the casing through the connecting point between the casing and the sensor body, and the protection property of elements in the sensor body is effectively improved; and the circular ring and the sealing plate can effectively seal the rear side of the supporting plate, so that a water source can be prevented from flowing into the machine shell through the other side of the machine shell.

Description

Technical Field

[0001] The utility model belongs to the technical field of NTC temperature measuring sensors, and particularly relates to a waterproof NTC temperature measuring sensor. Background Art

[0002] NTC temperature sensor is a commonly used temperature sensor, and its core is NTC thermistor. NTC is the abbreviation of negative temperature coefficient, which means that the resistance value of this thermistor will decrease as the temperature rises. NTC temperature sensor is usually composed of 2 to 3 metal oxides, such as manganese, cobalt, nickel and copper, etc. These metal oxides are mixed in fluid-like clay and sintered into dense sintered ceramics in a high-temperature furnace. NTC temperature sensor has the advantages of high sensitivity, fast response speed and flexible size, so it is widely used in medical, automotive, military aerospace and temperature control home appliances such as dryers and coffee machines.

[0003] The Chinese patent with the publication number "CN204988520U" discloses a waterproof NTC temperature sensor, including a rubber sleeve, an NTC thermistor and a test rod in contact with the object to be measured, one end of the test rod is sleeved in the rubber sleeve, and the other end extends out of the rubber sleeve. The test rod is provided with a receiving cavity for accommodating the NTC thermistor, the NTC thermistor is located on the top wall of the receiving cavity, and is sealed in the receiving cavity by an epoxy resin provided, and the NTC thermistor is connected to an external control board through a wire. Its advantages are that it can accurately measure temperature and play a waterproof role.

[0004] However, NTC sensors still have some shortcomings. Although the sensor shell has good sealing properties, there are still some gaps at the connection points between the shells. When the sensor shell comes into contact with water, the water will flow into the interior through the connection points between the shells, causing certain harm and impact on the workpiece inside the sensor shell. Utility Model Content

[0005] In view of the problems mentioned in the background technology, the purpose of the utility model is to provide a waterproof NTC temperature sensor to solve the problems mentioned in the background technology.

[0006] The above technical objectives of the utility model are achieved through the following technical solutions:

[0007] A waterproof NTC temperature sensor comprises a sensor body, a test rod is installed on one side of the sensor body, the other side of the sensor body is threadedly connected to a housing, a thermistor is installed inside the sensor body, a connecting groove is provided on the other side of the thermistor, a support plate is slidably connected to the inner wall of the housing, a power supply module is installed on one side of the support plate, a connecting block is installed on one side of the power supply module, the position of the connecting block is symmetrical to the position of the connecting groove, the connecting block is plugged into the inside of the connecting groove, a connecting plate is fixedly connected to one side of the housing, a sealing ring is fixedly connected to one side of the connecting plate, a limiting groove matching the sealing ring is provided on the other side of the sensor body, and the sealing ring covers the inner side of the limiting groove. The thermistor is located on the inner side of the sealing ring, and a ring is threadedly connected to the other side of the casing. A sealing plate is fixedly connected to the other side of the ring. The sealing plate covers the other side of the casing. A power line is installed on the other side of the support plate. By inserting the sealing ring into the limit groove, the connection point between the casing and the sensor body can be effectively sealed, thereby preventing water from flowing into the sensor body through the connection point between the two, thereby effectively improving the protection of the workpiece inside the sensor body. Epoxy resin is provided on the inner side of the sensor body. The epoxy resin is used to seal the NTC thermistor in the accommodating cavity to prevent moisture and other contaminants from entering, thereby ensuring the accuracy and stability of the sensor.

[0008] As a preferred technical solution, a thread groove is provided on the other side of the sensor body, and a connecting frame matching the thread groove is fixedly connected to one side of the connecting plate. An external thread matching the thread groove is provided on the outer wall of the connecting frame. The connecting frame is threadedly connected to the inside of the thread groove through the external thread. The thread groove and the connecting frame are connected to each other, so that the position of the casing can be effectively threadedly fixed. When the connecting frame is tightened, its sealing ring will also be clamped in the limit groove. When disassembling the casing, the connecting frame can be unscrewed out of the thread groove, which is convenient for later disassembly of the casing and also convenient for the user to protect the internal devices of the casing.

[0009] As a preferred technical solution, a strip opening is provided on the outer wall of the casing, the strip opening passes through the casing, and the strip opening communicates with the interior of the casing. A protective glass is fixedly connected to the inner side of the strip opening, and the protective glass covers the inner side of the strip opening. Due to the opening of the strip opening, the user can view the inner side of the casing through the protective glass without opening the casing, thereby facilitating the user to observe the workpiece inside the casing at all times, and at the same time, the protection of the workpiece inside the casing can be improved.

[0010] As a preferred technical solution, a screw hole is provided on the other side of the sealing plate, the screw hole penetrates the sealing plate, the inner side of the screw hole is threadedly connected with a bolt, one side of the bolt is threadedly connected to the inside of the casing through the screw hole, and the bolt is screwed into the screw hole, so that the position of the sealing plate can be effectively threaded and fixed, and the sealing plate can effectively support and limit the position of the support plate, thereby preventing the support plate from being displaced. When removing the sealing plate, the bolt can be screwed out of the screw hole, and the disassembled sealing plate can also take the support plate out together.

[0011] As a preferred technical solution, a handle is fixedly connected to the other side of the sealing plate, and the handle is fixedly connected to the left and right corners of the other side of the sealing plate. The shape of the handle is concave, and the shape of the handle corners is arc-shaped. The outer wall of the handle is coated with an anti-slip layer. Due to the presence of the handle, the handle can provide the user with a gripping point. When removing the sealing plate, it will be more convenient and quick for the user to pull out the sealing plate through the handle.

[0012] As a preferred technical solution, a sliding groove matching the support plate is provided on the inner wall of the casing, and the support plate is slidably connected to the inner wall of the casing through the sliding groove. The support plate covers the inner side of the casing, and the sliding groove facilitates the up and down sliding of the support plate, thereby facilitating the user to adjust the position of the support plate, and also making it easier to disassemble the support plate later.

[0013] As a preferred technical solution, a shock-absorbing pad is fixedly connected to one side of the support plate. The shock-absorbing pad is fixedly connected to the corner position of one side of the support plate. The position of the shock-absorbing pad is symmetrical with the position of the power supply module. The shock-absorbing pad has good shock resistance. When the casing shakes, the shock-absorbing pad can offset a large amount of vibration, thereby improving the protection of the power supply module itself.

[0014] As a preferred technical solution, an aluminum plate is fixedly connected to the inner wall of the casing, and the inner side of the aluminum plate is symmetrical with the outer side of the power supply module. Due to the presence of the aluminum plate, the aluminum plate has good heat absorption and dissipation capabilities, thereby being able to disperse a large amount of heat released by the power supply module, thereby effectively improving the service life of the power supply module itself.

[0015] As a preferred technical solution, the power supply modules are connected to the thermistor, the test rod, and the sensor body circuit, the power supply wires are connected to the power supply module circuit, and the sensor body is electrically connected to the thermistor and the test rod. The power supply modules can be effectively powered by the power supply wires, and the power supply modules can effectively power the electrical components on the sensor body so that these electrical components can operate normally, and the sensor body can also effectively control the operation of these electrical components.

[0016] In summary, the utility model mainly has the following beneficial effects:

[0017] First, when in use, the power supply module can be powered by the power line, and the power supply module can make the sensor body operate normally. Due to the existence of the sealing ring, the sealing ring can effectively seal the connection point between the housing and the sensor body, thereby preventing water from flowing into the housing through the connection point between the two, thereby effectively improving the protection of the internal components of the sensor body. Due to the existence of the ring and the sealing plate, the ring and the sealing plate can effectively seal the rear side of the support plate, thereby preventing water from flowing into the interior of the sensor body through the other side of the housing;

[0018] Second, because the casing is fixed to the other side of the sensor body through the thread principle, when the casing needs to be removed, the user twists the casing and screws the connecting frame out of the thread groove to remove it. While facilitating the disassembly and assembly of the casing, it is also convenient for later inspection and maintenance of the workpiece inside the casing. Because the sealing plate is also fixed with threads, when the bolt is screwed out of the screw hole, the sealing plate will also be removed. When the sealing plate is pulled out, the supporting plate will also be brought out of the casing together, so it is convenient for the user to remove the workpiece on the supporting plate from the casing later. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the utility model;

[0020] Figure 2 This utility model Figure 1 A schematic diagram of the enlarged structure of part A;

[0021] Figure 3 It is a schematic diagram of the cross-sectional structure of the sensor body of the utility model;

[0022] Figure 4 It is a schematic diagram of the internal structure of the casing of the utility model;

[0023] Figure 5 It is a schematic diagram of the plane structure of the casing of the utility model;

[0024] Figure 6 It is a schematic diagram of the sealing plate structure of the utility model;

[0025] Figure 7 It is a schematic diagram of the bottom structure of the casing of the utility model;

[0026] Figure 8 It is a three-dimensional structural schematic diagram of the utility model.

[0027] Figure numerals: 1. sensor body, 2. test rod, 3. housing, 4. connecting plate, 5. thermistor, 6. connecting groove, 7. threaded groove, 8. limit groove, 9. support plate, 10. slide groove, 11. power supply module, 12. connecting block, 13. aluminum plate, 14. shock-absorbing pad, 15. power wire, 16. ring, 17. sealing plate, 18. screw hole, 19. handle, 20. bolt, 21. strip mouth, 22. protective glass, 23. connecting frame, 24. external thread, 25. sealing ring. DETAILED DESCRIPTION

[0028] refer to Figures 1 to 8 In this embodiment, a waterproof NTC temperature sensor is provided. A test rod 2 is installed on one side of a sensor body 1. A housing 3 is threadedly connected to the other side of the sensor body 1. A thermistor 5 is installed inside the sensor body 1. A connecting groove 6 is provided on the other side of the thermistor 5. A support plate 9 is slidably connected to the inner wall of the housing 3. A power supply module 11 is installed on one side of the support plate 9. A connecting block 12 is installed on one side of the power supply module 11. The position of the connecting block 12 is symmetrical to that of the connecting groove 6. The connecting block 12 is plugged into the inside of the connecting groove 6. A connecting block 12 is fixedly connected to one side of the housing 3. Plate 4, one side of the connecting plate 4 is fixedly connected with a sealing ring 25, the other side of the sensor body 1 is provided with a limiting groove 8 matching the sealing ring 25, the sealing ring 25 covers the inner side of the limiting groove 8, the thermistor 5 is located on the inner side of the sealing ring 25, the other side of the housing 3 is threadedly connected with a ring 16, the other side of the ring 16 is fixedly connected with a sealing plate 17, the sealing plate 17 covers the other side of the housing 3, the other side of the support plate 9 is installed with a conducting wire 15, the thermistor 5 is the core part of the sensor body 1, and is a thermistor 5 whose resistance value decreases as the temperature increases. It is usually composed of two or three metal oxides, mixed in a fluid-like clay, and sintered in a high-temperature furnace to form a dense sintered ceramic. The test rod 2 is the part that directly contacts the object to be tested, and usually has a cavity for accommodating the thermistor 5. One end of the test rod 2 is sleeved in a rubber sleeve, and the other end extends out of the rubber sleeve so as to contact the object to be tested. The inside of the sensor body 1 is provided with a rubber sleeve, which is used to fix and protect the test rod 2 and the thermistor 5, and also plays a waterproof role. The entire sensor body 1 is also provided with epoxy resin inside, and the epoxy resin is used to seal the thermistor 5. In the accommodating cavity, moisture and other contaminants can be prevented from entering, thereby ensuring the accuracy and stability of the sensor. Due to the presence of the sealing ring 25, the sealing ring 25 can effectively seal the connection point between the housing 3 and the sensor body 1, thereby preventing water from flowing into the housing 3 through the connection point between the two, thereby effectively improving the protection of the internal components of the sensor body 1. Due to the presence of the ring 16 and the sealing plate 17, the ring 16 and the sealing plate 17 can effectively seal the back side of the support plate 9, thereby preventing water from flowing into the interior of the housing 3 through the other side of the housing 3.

[0029] refer to Figures 3 to 5 A thread groove 7 is provided on the other side of the sensor body 1, and a connecting frame 23 matching the thread groove 7 is fixedly connected to one side of the connecting plate 4. An external thread 24 matching the thread groove 7 is provided on the outer wall of the connecting frame 23. The connecting frame 23 is threadedly connected to the inside of the thread groove 7 through the external thread 24. Due to the existence of the connecting frame 23, the position of the housing 3 can be effectively limited and fixed by screwing the connecting frame 23 into the thread groove 7. When the connecting frame 23 is tightened, its sealing ring 25 will also be firmly sealed on the inner side of the limiting groove 8. At the same time, because it is threaded, the user can remove the housing 3 by twisting it in the opposite direction, which is also convenient for the user to disassemble the housing 3 later.

[0030] refer to Figure 1 A strip opening 21 is provided on the outer wall of the casing 3, the strip opening 21 penetrates the casing 3, and the strip opening 21 communicates with the interior of the casing 3. A protective glass 22 is fixedly connected to the inner side of the strip opening 21, and the protective glass 22 covers the inner side of the strip opening 21. Due to the opening of the strip opening 21, the user can directly view the interior of the casing 3 through the protective glass 22 without opening the casing 3, so that the user can observe the internal workpiece of the casing 3 at all times, thereby effectively improving the protection of the internal workpiece of the casing 3.

[0031] refer to Figure 1 and Figure 2 and Figure 6 and Figure 7 A screw hole 18 is provided on the other side of the sealing plate 17, and the screw hole 18 penetrates the sealing plate 17. A bolt 20 is threadedly connected to the inner side of the screw hole 18. One side of the bolt 20 is threadedly connected to the inside of the casing 3 through the screw hole 18. Because the sealing plate 17 is also fixed by threads, when the bolt 20 is screwed out of the screw hole 18, the sealing plate 17 will also be removed. When the sealing plate 17 is pulled out, the support plate 9 will also be taken out of the casing 3 together. Therefore, it is convenient for the user to remove the workpiece on the support plate 9 from the casing 3 later, which can effectively facilitate the user to maintain the workpiece on the support plate 9.

[0032] refer to Figure 6 A handle 19 is fixedly connected to the other side of the sealing plate 17. The handle 19 is fixedly connected to the left and right corners of the other side of the sealing plate 17. The shape of the handle 19 is concave, and the shape of the corners of the handle 19 is arc-shaped. The outer wall of the handle 19 is coated with an anti-slip layer. Due to the existence of the handle 19, the handle 19 can provide the user with a gripping point. When the bolt 20 is screwed out of the screw hole 18, the user can pull out the sealing plate 17 more conveniently and quickly through the gripping point provided by the handle 19. Because the shape of the corners of the handle 19 is arc-shaped, the corners of the handle 19 can also be prevented from hurting the user's palm.

[0033] refer to Figure 7 A slide groove 10 matching the support plate 9 is provided on the inner wall of the casing 3. The support plate 9 is slidably connected to the inner wall of the casing 3 through the slide groove 10. The support plate 9 covers the inner side of the casing 3. Because the support plate 9 is slidably connected to the inner wall of the casing 3, the user can directly adjust the position of the support plate 9 through the slide groove 10, so that the user can insert the connecting block 12 into the connecting groove 6 at the position of a certain power supply module 11, and it is also more conducive to the later disassembly of the support plate 9.

[0034] refer to Figure 5 A shock-absorbing pad 14 is fixedly connected to one side of the support plate 9. The shock-absorbing pad 14 is fixedly connected to the corner position of one side of the support plate 9. The position of the shock-absorbing pad 14 is symmetrical with the position of the power supply module 11. Due to the existence of the shock-absorbing pad 14, the shock-absorbing pad 14 is made of rubber material and has good shock-absorbing ability. When the casing 3 shakes, the shock-absorbing pad 14 can offset a large amount of shaking frequency, which can effectively improve the shock-absorbing ability of the power supply module 11 itself, and also improve the protection of the power supply module 11 itself.

[0035] refer to Figure 5 An aluminum plate 13 is fixedly connected to the inner wall of the casing 3, and the inner side of the aluminum plate 13 is symmetrical with the outer side of the power supply module 11. Due to the existence of the aluminum plate 13, the aluminum plate 13 is an aluminum product with good heat dissipation ability. When the power supply module 11 is running, it will release a certain amount of heat, and the aluminum plate 13 can absorb the heat, so that the power supply module 11 and the inner side of the casing 3 can be effectively cooled, and the service life of the power supply module 11 itself is also effectively improved.

[0036] refer to Figures 1 to 8 The power supply module 11 is connected to the thermistor 5, the test rod 2, and the sensor body 1 circuit, the power-on wire 15 is connected to the power supply module 11 circuit, and the sensor body 1 is electrically connected to the thermistor 5 and the test rod 2. The power-on wire 15 can effectively power the power supply module 11, and the power supply module 11 can effectively power the electrical components on the sensor body 1 so that these electrical components can operate normally, and the sensor body 1 can also effectively control the operation of these electrical components.

[0037] Principle and advantages of use: When in use, the power line 15 can effectively power the power supply module 11, and the power supply module 11 can effectively power the electrical components on the sensor body 1 so that these electrical components can operate normally, and the sensor body 1 can also effectively control the operation of these electrical components. Due to the existence of the sealing ring 25, the sealing ring 25 can effectively seal the connection point between the housing 3 and the sensor body 1, thereby preventing water from flowing into the housing 3 through the connection point between the two, thereby effectively improving the protection of the internal components of the sensor body 1. Due to the existence of the ring 16 and the sealing plate 17, the ring 16 and the sealing plate 17 can effectively seal the rear side of the support plate 9, thereby preventing water from flowing through the housing 3. The other side of the casing 3 flows into its own interior. Due to the existence of the connecting frame 23, the connecting frame 23 is screwed into the threaded groove 7 to effectively limit and fix the position of the casing 3. When the connecting frame 23 is tightened, the sealing ring 25 will also be firmly sealed on the inner side of the limiting groove 8. At the same time, due to the threaded fixing, the user can remove the casing 3 by twisting it in the opposite direction, which is also convenient for the user to disassemble the casing 3 later. Due to the opening of the strip-shaped opening 21, the user can directly view the interior of the casing 3 through the protective glass 22 without opening the casing 3, which is convenient for the user to observe the internal workpiece of the casing 3 at all times, thereby effectively improving the protection of the internal workpiece of the casing 3. Because the sealing plate 17 is also fixed by threads, the bolt 20 is screwed out When the screw hole 18 is screwed out, the sealing plate 17 will also be removed. When the sealing plate 17 is pulled out, the supporting plate 9 will also be taken out of the casing 3. Therefore, it is convenient for the user to remove the workpiece on the supporting plate 9 from the casing 3 later, which can effectively facilitate the user to perform maintenance on the workpiece on the supporting plate 9. Due to the existence of the handle 19, the handle 19 can provide the user with a gripping point. When the bolt 20 is screwed out of the screw hole 18, the user can use the gripping point provided by the handle 19 to pull out the sealing plate 17 more conveniently and quickly. Because the shape of the corners of the handle 19 is arc-shaped, it can also prevent the corners of the handle 19 from hurting the user's palm. Because the supporting plate 9 is slidably connected to the inner wall of the casing 3, the user can directly adjust the position of the supporting plate 9 through the slide groove 10. Therefore, it is convenient for the user to insert the connecting block 12 into the connecting groove 6 at the position of a certain power supply module 11, and it is also more conducive to the later disassembly of the support plate 9. Due to the existence of the shock-absorbing pad 14, the shock-absorbing pad 14 is made of rubber material and has good shock-absorbing ability. When the casing 3 shakes, the shock-absorbing pad 14 can offset a large amount of shaking frequency, which can effectively improve the shock-absorbing ability of the power supply module 11 itself, and also improve the protection of the power supply module 11 itself. Due to the existence of the aluminum plate 13, the aluminum plate 13 is an aluminum product with good heat dissipation ability. When the power supply module 11 is running, it will release a certain amount of heat, and the aluminum plate 13 can absorb the heat, so that the power supply module 11 and the inner side of the casing 3 can be effectively cooled.At the same time, the service life of the power supply module 11 itself is effectively improved.

Claims

1. A waterproof NTC temperature sensor, comprising a sensor body, characterized in that: A test rod is installed on one side of the sensor body, and the other side of the sensor body is threadedly connected to the casing. A thermistor is installed inside the sensor body, and a connecting groove is provided on the other side of the thermistor. A support plate is slidably connected to the inner wall of the casing, a power supply module is installed on one side of the support plate, and a connecting block is installed on one side of the power supply module, the position of the connecting block is symmetrical with the position of the connecting groove, and the connecting block is plugged into the inside of the connecting groove, a connecting plate is fixedly connected to one side of the casing, and a sealing ring is fixedly connected to one side of the connecting plate, a limiting groove matching the sealing ring is provided on the other side of the sensor body, and the sealing ring covers the inner side of the limiting groove, and the thermistor is located on the inner side of the sealing ring, a circular ring is threadedly connected to the other side of the casing, a sealing plate is fixedly connected to the other side of the circular ring, and the sealing plate covers the other side of the casing, and a conducting wire is installed on the other side of the support plate.

2. A waterproof NTC temperature sensor according to claim 1, characterized in that: A thread groove is provided on the other side of the sensor body, a connection frame matching the thread groove is fixedly connected to one side of the connection plate, an external thread matching the thread groove is provided on the outer wall of the connection frame, and the connection frame is threadedly connected to the inside of the thread groove through the external thread.

3. A waterproof NTC temperature sensor according to claim 1, characterized in that: A strip opening is provided on the outer wall of the housing, the strip opening penetrates the housing, the strip opening is communicated with the interior of the housing, a protective glass is fixedly connected to the inner side of the strip opening, and the protective glass covers the inner side of the strip opening.

4. A waterproof NTC temperature sensor according to claim 1, characterized in that: A screw hole is provided on the other side of the sealing plate, and the screw hole penetrates the sealing plate. A bolt is threadedly connected to the inner side of the screw hole, and one side of the bolt is threadedly connected to the inside of the housing through the screw hole.

5. A waterproof NTC temperature sensor according to claim 4, characterized in that: A handle is fixedly connected to the other side of the sealing plate, and the handle is fixedly connected to the left and right corners of the other side of the sealing plate. The shape of the handle is concave, the shape of the handle corner is arc-shaped, and the outer wall of the handle is coated with an anti-slip layer.

6. A waterproof NTC temperature sensor according to claim 1, characterized in that: A sliding groove matching the support plate is provided on the inner wall of the casing, and the support plate is slidably connected to the inner wall of the casing through the sliding groove, and the support plate covers the inner side of the casing.

7. The waterproof NTC temperature sensor according to claim 1, characterized in that: A shock-absorbing pad is fixedly connected to one side of the support plate, and the shock-absorbing pad is fixedly connected to a corner position of one side of the support plate, and the position of the shock-absorbing pad is symmetrical to the position of the power supply module.

8. The waterproof NTC temperature sensor according to claim 1, characterized in that: An aluminum plate is fixedly connected to the inner wall of the housing, and the inner side of the aluminum plate is symmetrical to the outer side of the power supply module.

9. The waterproof NTC temperature sensor according to claim 1, characterized in that: The power supply modules are connected to the thermistor, the test rod, and the sensor body circuit, the power supply wires are connected to the power supply module circuit, and the sensor body is electrically connected to the thermistor and the test rod.

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