Water heating PTC temperature sensing device

Abstract

The water heating PTC temperature sensing device is arranged between an object to be measured and a measuring circuit board and comprises an abutting assembly, a connecting assembly and a driving assembly, the abutting assembly comprises a thermistor and two wires, the thermistor is arranged opposite to the object to be measured, one end of each wire is electrically connected with the thermistor, and the other end of each wire is electrically connected with the connecting assembly. The connecting assembly comprises a connector terminal, the connector terminal is electrically connected with the other ends of the two wires and connected to the measuring circuit board, the driving assembly is provided with a fixed end and a movable end, the fixed end of the driving assembly is connected to the measuring circuit board, and the movable end of the driving assembly is connected to the thermistor and used for pushing the thermistor to move close to an object to be measured. And the probe is abutted against the to-be-measured object. According to the utility model, the problem that the measurement result is inaccurate due to the fact that the heat cannot be effectively transmitted because the close contact between the main body shell and the object to be measured cannot be guaranteed can be effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of sensors, in particular to a water heating PTC temperature sensing device. Background Art

[0002] Temperature sensors are widely used in the automotive field due to their unique advantages.

[0003] For example, the Chinese utility model patent with application number CN201920852767.5 is titled: A diversion drainage heating PTC temperature sensing device and temperature sensing assembly, comprising a main body shell, the main body shell including a welding portion and a cavity portion, and an opening is respectively provided on both sides of the cavity portion; a thermistor chip, the thermistor chip is arranged in the cavity portion; and a wire and an epoxy resin layer, wherein the thermistor chip is electrically connected to the wire, and the epoxy resin layer is arranged in the main body shell to cover and fill the thermistor chip and the main body shell. When working, the sensor mainly realizes heat transfer and detection by heat transfer, so whether the main body shell and the object to be measured can be in close contact will directly affect the accuracy of the measurement results.

[0004] Therefore, there is an urgent need for a water heating PTC temperature sensing device to solve the problem in the prior art that heat cannot be effectively transferred due to the inability to ensure close contact between the main body shell and the object to be measured, thereby leading to inaccurate measurement results. Utility Model Content

[0005] The purpose of the present invention is to overcome the above technical deficiencies and propose a water heating PTC temperature sensing device to solve the technical problem in the prior art that the heat cannot be effectively transferred due to the inability to ensure close contact between the main body shell and the object to be measured, thereby leading to inaccurate measurement results.

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

[0007] The utility model provides a water heating PTC temperature sensing device, which is arranged between the object to be measured and the measuring circuit board, and includes:

[0008] An abutment assembly includes a thermistor and two wires, wherein the thermistor is arranged relative to the object to be measured, and one end of the two wires is electrically connected to the thermistor respectively;

[0009] a connecting assembly, comprising a connector terminal, wherein the connector terminal is electrically connected to the other ends of the two wires and is connected to the measurement circuit board; and

[0010] The driving component has a fixed end and a movable end. The fixed end of the driving component is connected to the measurement circuit board, and the movable end is connected to the thermistor, and is used to push the thermistor to move close to the object to be measured and abut against the object to be measured.

[0011] In some embodiments, the abutment assembly further includes a temperature-sensitive housing and epoxy resin, the temperature-sensitive housing is covered on the thermistor and one end of the two wires, and the epoxy resin seals and fills the gap between the thermistor and one end of the two wires.

[0012] In some embodiments, the abutting assembly further includes an encapsulating resin layer and a soldering layer sequentially provided by built-in objects, and the encapsulating resin layer and the soldering layer are sleeved on the connection between the thermistor and the two wires.

[0013] In some embodiments, a frame is formed on the circumferential side wall of the temperature-sensing housing, and the movable end of the driving assembly is arranged relative to the frame and can abut against the frame.

[0014] In some embodiments, the connection assembly further includes a sleeve, which is sleeved on the two wires.

[0015] In some embodiments, the connection assembly further includes at least one locking member, which is sleeved on the sleeve and detachably connected to the two wires, so as to enable the sleeve to be detachably connected to the two wires.

[0016] In some embodiments, the locking member is a cable tie.

[0017] In some embodiments, the driving assembly includes a baffle ring and an elastic part, the baffle ring is slidably sleeved on the two wires and is arranged between the frame and the locking member, the elastic part is arranged between the frame and the baffle ring, and one end of the elastic part can abut against the baffle ring, and the other end of the elastic part can abut against the frame, which is used to push the temperature sensing housing and the frame against the object to be measured.

[0018] In some embodiments, the elastic portion is a conical coil spring, and the area of ​​the baffle ring is larger than the area of ​​the frame.

[0019] In some embodiments, a linear drive portion is provided on the measuring circuit board, and the linear drive portion has a fixed end and an extension end. The baffle ring has two mounting holes, and the two mounting holes are arranged on both sides of the sleeve. The baffle ring is detachably connected to the extension end of the linear drive portion of the measuring circuit board through the two mounting holes.

[0020] Compared with the prior art, the beneficial effects of the water heating PTC temperature sensing device provided by the present invention include: a thermistor is arranged relative to the object to be measured, and is electrically connected to the measurement circuit board through two wires and connector terminals, the fixed end of the drive component is connected to the measurement circuit board, and the movable end is connected to the thermistor, which is used to push the thermistor to move close to the object to be measured and make the thermistor and the object to be measured closely. Compared with the prior art, the thermistor is connected to the measurement circuit board by setting two wires and connector terminals, and the drive component is set to enable the thermistor to move close to the object to be measured and press against the object to be measured, thereby effectively ensuring that the thermistor is in contact with the object to be measured and effectively achieving heat transfer. This can solve the problem in the prior art that heat cannot be effectively transferred due to the inability to ensure close contact between the main body shell and the object to be measured, thereby leading to inaccurate measurement results. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a three-dimensional structural diagram of a water heating PTC temperature sensing device provided by an embodiment of the utility model;

[0022] Figure 2 This is a schematic diagram of a three-dimensional structure of a wire connected to a thermistor provided in an embodiment of the utility model;

[0023] Figure 3 This is a schematic cross-sectional view of the connection between the wire, the thermistor, the temperature sensing housing, the frame, the epoxy resin, the encapsulating resin layer and the solder layer provided in an embodiment of the present invention;

[0024] Figure 4 This is a structural schematic diagram of another state of a water heating PTC temperature sensing device provided by an embodiment of the present utility model.

[0025] Description of reference numerals:

[0026] Abutment assembly 1; thermistor 11; wire 12; temperature sensing housing 13; frame 131; epoxy resin 14; encapsulating resin layer 15; solder layer 16; connection assembly 2; connector terminal 21; sleeve 22; locking member 23; drive assembly 3; baffle ring 31; elastic portion 32. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0028] In order to solve the technical problem that heat cannot be effectively transferred due to the inability to ensure close contact between the main body shell and the object to be measured, thereby causing inaccurate measurement results, the utility model provides a water heating PTC temperature sensing device, which can enable the thermistor 11 to move close to the object to be measured and press against the object to be measured, thereby effectively ensuring that the thermistor 11 is in contact with the object to be measured and effectively realizing heat transfer.

[0029] It should be noted that the water heating PTC temperature sensor device described in the present invention is used for but not limited to the field of sensor technology. For the convenience of explanation, in the present invention, only the application of the water heating PTC temperature sensor device in the field of sensor technology is used as an example for explanation. The principle of applying the water heating PTC temperature sensor device to other types of equipment is essentially the same as the principle applied to the field of sensor technology, and will not be elaborated here.

[0030] See also Figures 1 to 4 , Figure 1 This is a structural schematic diagram of a water-heating PTC temperature sensing device in one embodiment of the present utility model. The water-heating PTC temperature sensing device is arranged between the object to be measured and the measuring circuit board, including: an abutment component 1, a connection component 2 and a drive component 3. The abutment component 1 includes a thermistor 11 and two wires 12. The thermistor 11 is arranged relative to the object to be measured, and one end of the two wires 12 is electrically connected to the thermistor 11 respectively. The connection component 2 includes a connector terminal 21, and the connector terminal 21 is electrically connected to the other end of the two wires 12 and is connected to the measuring circuit board. The drive component 3 has a fixed end and a movable end. The fixed end of the drive component 3 is connected to the measuring circuit board, and the movable end is connected to the thermistor 11, which is used to push the thermistor 11 to move close to the object to be measured and abut against the object to be measured.

[0031] In this device, the thermistor 11 is arranged relative to the object to be measured and is electrically connected to the measurement circuit board through two wires 12 and connector terminals 21. The fixed end of the drive component 3 is connected to the measurement circuit board, and the movable end is connected to the thermistor 11, which is used to push the thermistor 11 to move closer to the object to be measured and make the thermistor 11 close to the object to be measured.

[0032] Compared with the prior art, the thermistor 11 is connected to the measurement circuit board by providing two wires 12 and connector terminals 21, and a drive component 3 is provided at the same time so that the thermistor 11 can move close to the object to be measured and press against the object to be measured, thereby effectively ensuring that the thermistor 11 is in contact with the object to be measured and effectively realizing heat transfer. This can solve the problem in the prior art that heat cannot be effectively transferred due to the inability to ensure close contact between the main body shell and the object to be measured, thereby leading to inaccurate measurement results.

[0033] Furthermore, the thermistor 11 is electrically connected to the measuring circuit board for measuring the temperature of the object to be measured. This is a conventional setting known to those skilled in the art. The thermistor 11, connector terminal 21, and measuring circuit board are all common and easily purchased equipment on the market, and will not be described in detail here.

[0034] In this embodiment, the abutting assembly 1 further includes a temperature sensing housing 13 and an epoxy resin 14 , and an encapsulating resin layer 15 and a solder layer 16 sequentially provided by built-in components.

[0035] The temperature sensing housing 13 is disposed over the thermistor 11 and one end of the two wires 12 , and the epoxy resin 14 is sealed and filled in the gap between the thermistor 11 and one end of the two wires 12 .

[0036] The temperature sensing housing 13 is provided to protect the thermistor 11 , wherein the epoxy resin 14 is provided to ensure the sealing of the thermistor 11 .

[0037] Furthermore, the temperature sensing housing 13 is made of metal, and the epoxy resin 14 is a common and easily purchased device on the market. This is a conventional setting well known to those skilled in the art and will not be described in detail here.

[0038] In one embodiment, the encapsulating resin layer 15 and the solder layer 16 are sequentially sleeved on the connection between the thermistor 11 and the two wires 12 .

[0039] Specifically, the core wires of the two wires 12 are respectively welded to the NTC thermistor 11, and the solder layer 16 is a double-layer Teflon solder layer 16. The solder layer 16 is sleeved on the welding point between the NTC thermistor 11 and the two wires 12, and an insulating sheet is placed between the two. After high-temperature baking with a hot air gun for 8 minutes, rotating hot air is blown to the sleeve 22, and it is observed that the inner layer is completely melted and the solder layer 16 shrinks.

[0040] Furthermore, after the NTC thermistor 11 is connected to the wire 12 by soldering, it is encapsulated by a waterproof process, placed in a metal housing, injected with epoxy resin 14, and then baked and cured, which will not be described in detail here.

[0041] In one embodiment, see Figure 1 、 Figure 2 and Figure 3 A frame 131 is formed on the circumferential side wall of the temperature sensing housing 13 , and the movable end of the driving assembly 3 is arranged relative to the frame 131 and can abut against the frame 131 .

[0042] The frame 131 is provided to increase the contact area between the temperature sensing housing 13 and the movable end of the driving assembly 3 , thereby improving the stability of the device operation.

[0043] In this embodiment, the connecting assembly 2 further includes a sleeve 22 and at least one locking member 23 .

[0044] The sleeve 22 is sleeved on the two wires 12 .

[0045] The sleeve 22 is used to protect the wire 12 from being bent or damaged.

[0046] In one embodiment, see Figure 1 、 Figure 4 The locking member 23 is sleeved on the sleeve 22 and is detachably connected to the two wires, so that the sleeve 22 can be detachably connected to the two wires 12.

[0047] The sleeve 22 is detachably connected to the two wires 12 to facilitate replacement and maintenance of the sleeve 22 .

[0048] Specifically, the locking member 23 in the present device is a cable tie, which is convenient for users to install and replace, has low cost and is easy to operate.

[0049] Furthermore, the cable ties here are common and easily purchased equipment on the market, and are conventional settings well known to those skilled in the art, and will not be described in detail here.

[0050] In this embodiment, the driving assembly 3 includes a baffle ring 31 and an elastic portion 32. The baffle ring 31 is slidably sleeved on the two wires 12 and is arranged between the frame 131 and the locking member 23. The elastic portion 32 is arranged between the frame 131 and the baffle ring 31, and one end of the elastic portion 32 can abut against the baffle ring 31, and the other end of the elastic portion 32 can abut against the frame 131, which is used to push the temperature sensing housing 13 and the frame 131 to press against the object to be measured.

[0051] The sliding of the baffle ring 31 relative to the wire 12 can push the temperature sensing housing 13 to abut against the object to be measured, and the elastic restoring force generated by the elastic portion 32 can make the thrust more uniform, so that the temperature sensing housing 13 is tightly pressed against the object to be measured.

[0052] In one embodiment, the elastic portion 32 is a conical coil spring, and the area of ​​the blocking ring 31 is larger than the area of ​​the frame 131 .

[0053] The conical coil spring can make the thrust of the baffle ring 31 act evenly on the frame 131, thereby improving the stability of the device operation.

[0054] Furthermore, the conical coil spring here is a common and easily purchased device on the market. It is a conventional setting well known to those skilled in the art and will not be described in detail here.

[0055] In one embodiment, a linear drive portion is provided on the measuring circuit board, and the linear drive portion has a fixed end and an extension end. The baffle ring 31 has two mounting holes, and the two mounting holes are provided on both sides of the sleeve 22. The baffle ring 31 is detachably connected to the extension end of the linear drive portion of the measuring circuit board through the two mounting holes.

[0056] The mounting hole is used to realize a detachable connection between the baffle ring 31 and the extended end of the linear drive portion of the measurement circuit board, which is convenient for users to install.

[0057] Furthermore, the linear drive portion for measuring the circuit board here is a conventional setting well known to those skilled in the art and will not be described in detail here.

[0058] In order to better understand the present invention, the following Figures 1 to 4 The technical solution of the utility model is described in detail:

[0059] Thermistor 11 is positioned relative to the object to be measured and electrically connected to a measurement circuit board via two wires 12 and connector terminals 21. A drive assembly 3 has a fixed end connected to the measurement circuit board and a movable end connected to thermistor 11, and is used to propel thermistor 11 toward the object to be measured and secure it against the object. Compared to the prior art, the two wires 12 and connector terminals 21 connect thermistor 11 to the measurement circuit board, while the drive assembly 3 allows thermistor 11 to move toward the object to be measured and secure it against the object. This effectively ensures contact between thermistor 11 and the object to be measured, effectively enabling heat transfer.

[0060] The specific working process of the present invention is as follows: the core wires of the two wires 12 are respectively welded to the two pins of the NTC thermistor 11; the epoxy resin 14 is used to seal the welded state of the wires 12 and the NTC thermistor 11; the conical coil spring is first put on the outside of the wire 12 and then the baffle ring 31 is put on; the sleeve 22 is first put on the outside of the wire 12 and then the cable tie is locked; and the tail end of the wire 12 is crimped to the connector terminal 21 and then inserted into the connector.

[0061] Furthermore, after welding the NTC thermistor 11 to the wire 12, the steel housing is encapsulated with epoxy resin 14, ensuring proper operation after undergoing 80°C testing for over 1000 hours. A conical coil spring and retaining ring 31 securely hold the temperature-sensing housing 13 against the object under test, ensuring a closer contact and more accurate temperature measurement. The wire 12 can be bent and connected to the circuit board connector via connector terminals 21, effectively adapting to various circuit locations.

[0062] The device, through the above structure, can solve the problem in the prior art that the heat cannot be effectively transferred due to the failure to ensure close contact between the main body shell and the object to be measured, thereby causing inaccurate measurement results.

[0063] The specific embodiments of the present invention described above do not limit the scope of protection of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A water heating PTC temperature sensor device, arranged between the object to be measured and the measuring circuit board, characterized in that: include: An abutment assembly includes a thermistor and two wires, wherein the thermistor is arranged relative to the object to be measured, and one end of the two wires is electrically connected to the thermistor respectively; A connecting assembly, comprising a connector terminal, wherein the connector terminal is electrically connected to the other ends of the two wires and is connected to the measurement circuit board; as well as The driving component has a fixed end and a movable end. The fixed end of the driving component is connected to the measurement circuit board, and the movable end is connected to the thermistor, and is used to push the thermistor to move close to the object to be measured and abut against the object to be measured.

2. The water heating PTC temperature sensor device according to claim 1, characterized in that: The abutting assembly further includes a temperature-sensing shell and epoxy resin. The temperature-sensing shell covers the thermistor and one end of the two wires. The epoxy resin seals and fills the gap between the thermistor and one end of the two wires.

3. The water heating PTC temperature sensor device according to claim 2, characterized in that: The abutting component further comprises an encapsulating resin layer and a soldering layer which are sequentially provided by the built-in object, and the encapsulating resin layer and the soldering layer are sequentially sleeved on the connection between the thermistor and the two wires.

4. The water heating PTC temperature sensor device according to claim 3, characterized in that: A frame is formed on the circumferential side wall of the temperature sensing housing, and the movable end of the driving component is arranged relative to the frame and can abut against the frame.

5. The water heating PTC temperature sensor device according to claim 4, characterized in that: The connection assembly further includes a sleeve, which is sleeved on the two wires.

6. The water heating PTC temperature sensor device according to claim 5, characterized in that: The connection assembly further includes at least one locking member, which is sleeved on the sleeve and detachably connected to the two wires, so as to enable the sleeve to be detachably connected to the two wires.

7. The water heating PTC temperature sensor device according to claim 6, characterized in that: The locking piece is a cable tie.

8. The water heating PTC temperature sensor device according to claim 6, characterized in that: The driving assembly includes a baffle ring and an elastic part. The baffle ring is slidably sleeved on the two wires and is arranged between the frame and the locking member. The elastic part is arranged between the frame and the baffle ring, and one end of the elastic part can abut against the baffle ring, and the other end of the elastic part can abut against the frame, which is used to push the temperature sensing housing and the frame to press against the object to be measured.

9. The water heating PTC temperature sensor device according to claim 8, characterized in that: The elastic portion is a conical coil spring, and the area of ​​the baffle ring is larger than the area of ​​the frame.

10. The water heating PTC temperature sensor device according to claim 9, characterized in that: A linear drive portion is provided on the measuring circuit board, and the linear drive portion has a fixed end and an extended end. The baffle ring has two mounting holes, and the two mounting holes are provided on both sides of the sleeve. The baffle ring is detachably connected to the extended end of the linear drive portion of the measuring circuit board through the two mounting holes.

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