Cooling liquid NTC temperature sensor

Abstract

The utility model provides a coolant NTC temperature sensor, which comprises a sensor probe for detection and a sensor base for blocking protection, the sensor base is arranged on the outer side of the sensor probe, the upper end of the sensor probe is provided with a clamping device, the upper end of the clamping device is connected with a connecting support structure, and the connecting support structure is connected with the sensor probe. The upper end of the connection supporting structure is connected with a sensor female end. The utility model relates to a cooling liquid NTC temperature sensor, which is characterized in that the sensor female end is arranged, so that the device can accurately detect the temperature in the cooling liquid, and the filling fixing block, the inner side fixing layer, the injection molding piece with the terminal and the outer side protection layer are arranged, so that the high toughness, the heat stability and the hydrolysis resistance of the device are improved; and the clamping device is arranged, so that the device can be firmly fixed, and the stability of the device is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of sensors, and in particular relates to a coolant NTC temperature sensor. Background Art

[0002] NTC temperature sensor is a sensor that uses the characteristics of NTC thermistor to detect temperature. It is usually composed of NTC thermistor and external circuit. The resistance value of NTC temperature sensor decreases when the temperature rises, and increases when the temperature drops. This characteristic can be used to indirectly measure the temperature by measuring the resistance value. However, the current coolant NTC temperature sensor has poor water release, short life, insufficient durability, and needs to be replaced frequently to maintain the sensor effect, which is costly.

[0003] The existing authorized public number is CN217331424U. The utility model discloses an easy-to-install NTC temperature sensor for automobile coolant. The key points of the technical solution are that, by setting a retaining spring and a slot, the connecting part and the plug-in part are plugged together in the interior of the mounting ring during installation. After plugging, the opening side of the retaining spring is inserted from the slot into the interior of the annular groove, and continues to be inserted inward, so that the retaining spring is completely stuck in the annular groove, and the edge of the retaining spring is stuck with the slot, so as to achieve the fixation of the connecting part and the plug-in part. By inserting the plug-in part into the T-shaped socket, the card block is stuck in the vertical groove of the L-shaped groove, and when the card block is installed at the bottom of the L-shaped groove, the connecting part is rotated so that the card block is stuck in the horizontal groove of the L-shaped groove, so that the plug-in part and the T-shaped socket are installed together. By setting a rubber pad, when the connecting part and the plug-in part are installed together with the mounting ring, the rubber pad will be squeezed, so that the sealing of the connection is better. However, the above-mentioned coolant NTC temperature sensor has a simple structure and is made of relatively common materials, which results in poor waterproofness of the sensor, low durability, frequent replacement, and high cost. Therefore, a coolant NTC temperature sensor is urgently needed to solve the above-mentioned problems. Utility Model Content

[0004] The technical content of the utility model is to provide a coolant NTC temperature sensor.

[0005] In order to solve the above problems, the utility model provides a coolant NTC temperature sensor, comprising: a sensor probe for detection and a sensor base for protecting against blockage, and the sensor base is arranged on the outside of the sensor probe, and a clamping device is arranged on the upper end of the sensor probe, and a connecting support structure is connected to the upper end of the connecting support structure, and a sensor female end is connected to the upper end of the connecting support structure;

[0006] The sensor detection head includes an injection molded sleeve joint, and the injection molded sleeve joint is arranged at the central bottom of the clamping device;

[0007] The clamping device comprises a clamping seat, and the clamping seat is arranged at the upper end of the sensor detection head;

[0008] The connecting support structure comprises a connecting disc, and the connecting disc is arranged at the upper end of the clamping device;

[0009] The sensor female end comprises a filling and fixing block, and the filling and fixing block is fixedly connected to the upper end of the connection support structure.

[0010] As a further solution of the utility model, an electronic component is arranged inside the injection molded sleeve joint, and the upper end of the electronic component is connected to an electronic sensor circular plate through a component connecting tube. The sensor detection head, sensor base, clamping device, connecting support structure, and outer side material of the sensor female end are all PA material injection molded parts to protect the electronic components.

[0011] As a further solution of the utility model, the injection molded part sleeve joint is provided with a groove for matching the electronic component and the component connecting tube, so that the electronic component and the component connecting tube can be arranged in the injection molded part sleeve joint.

[0012] As a further solution of the utility model, the sensor base is provided with a hole matched with the sensor detection head, and a clamping spring is clamped on the outer side of the clamping base so that the device can be clamped.

[0013] As a further solution of the utility model, the snap-in card seat is provided with a snap-in groove matched with a snap-in spring, and the upper end of the snap-in card seat is provided with a groove matched with an electronic sensor circular plate, so that the device can be firmly fixed.

[0014] As a further solution of the utility model, a connecting support column is arranged at the center of the upper end of the connecting disc, two groups of trapezoidal clamping plates are connected to both sides of the connecting support column, a circuit connecting tube is arranged inside the connecting support column, and the connecting disc and the connecting support column are provided with connecting channels that cooperate with the circuit connecting tube, so that the female end of the sensor is firmly fixed on the connecting support structure.

[0015] As a further solution of the utility model, a thermistor is arranged inside the filling fixed block, a resistor connecting plate is arranged at the front end of the thermistor, the outer side of the filling fixed block is wrapped with an inner fixed layer, the outer side of the inner fixed layer is wrapped with an injection molded part with terminals, and the outer side of the injection molded part with terminals is connected to an outer protective layer, so that the device can detect the coolant temperature.

[0016] As a further solution of the utility model, the filling and fixing block is provided with grooves matching the thermistor, the resistor connecting plate and the circuit connecting tube, and the filling and fixing block, the inner fixing layer, the injection molded part with terminals and the outer protective layer are provided with fixing grooves matching the connecting support columns, so that the female end of the sensor can be firmly fixed on the connecting support structure without affecting the operation of the resistor.

[0017] In summary, the utility model includes at least one of the following beneficial technical effects:

[0018] First, the utility model records a coolant NTC temperature sensor, which records that by providing a sensor female end, the device can accurately detect the temperature in the coolant, and by providing a filling fixed block, an inner fixed layer, an injection molded part with a terminal, and an outer protective layer, the device has increased toughness, thermal stability, and hydrolysis resistance, and can be used in the coolant for a long time. By providing a clamping device, the device can be firmly fixed, thereby increasing the stability of the device.

[0019] Second, the utility model records a coolant NTC temperature sensor, which records that the sealing of the device is further enhanced by providing a sensor base, and the waterproofness of the device is enhanced by using PA material injection molding parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0021] Figure 1 It is a schematic diagram of the overall inclined structure of the left side of the coolant NTC temperature sensor of the utility model;

[0022] Figure 2 It is a schematic diagram of the overall inclined structure of the right side of the coolant NTC temperature sensor of the utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the sensor detection head of the coolant NTC temperature sensor of the utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the clamping device of the coolant NTC temperature sensor of the utility model;

[0025] Figure 5 This is a schematic diagram of the connection support structure of the coolant NTC temperature sensor of the utility model; Figure 6 This is a schematic diagram of the structure of the sensor female end of the coolant NTC temperature sensor of the utility model;

[0026] Figure numerals: 1. sensor detection head; 11. injection molding sleeve joint; 12. electronic component; 13. component connecting tube; 14. electronic sensor disc; 2. sensor base; 3. snap-on device; 31. snap-on socket; 32. snap-on spring; 4. connection support structure; 41. connection disc; 42. connection support column; 43. trapezoidal snap-on card; 44. circuit connection tube; 5. sensor female end; 51. filling fixing block; 52. thermistor; 53. resistor connecting plate; 54. inner fixing layer; 55. injection molding with terminal; 56. outer protective layer. DETAILED DESCRIPTION

[0027] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 The coolant NTC temperature sensor comprises: a sensor probe head 1 for detection and a sensor base 2 for preventing blockage, wherein the sensor base 2 is arranged on the outside of the sensor probe head 1, a clamping device 3 is arranged on the upper end of the sensor probe head 1, a connection support structure 4 is connected to the upper end of the clamping device 3, and a sensor female end 5 is connected to the upper end of the connection support structure 4;

[0028] The sensor detection head 1 includes an injection molded sleeve joint 11, and the injection molded sleeve joint 11 is arranged at the central bottom of the clamping device 3;

[0029] The card connection device 3 includes a card connection seat 31, and the card connection seat 31 is arranged at the upper end of the sensor detection head 1;

[0030] The connecting support structure 4 includes a connecting disc 41, and the connecting disc 41 is arranged at the upper end of the clamping device 3;

[0031] The sensor female end 5 includes a filling and fixing block 51 , and the filling and fixing block 51 is fixedly connected to the upper end of the connection support structure 4 .

[0032] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 5It can be seen that in order to make the device have higher structural strength and stronger durability, its structure is more reasonable, an electronic component 12 is arranged inside the injection molded sleeve 11, and the upper end of the electronic component 12 is connected to an electronic sensor disc 14 through a component connecting tube 13. The outer materials of the sensor detection head 1, the sensor base 2, the clamping device 3, the connecting support structure 4, and the sensor female end 5 are all made of PA66 material injection molded parts. The injection molded sleeve 11 is provided with a groove that matches the electronic component 12 and the component connecting tube 13. A connecting support column 42 is arranged at the center of the upper end of the connecting disc 41, and two groups of trapezoidal clamping cards 43 are connected to both sides of the connecting support column 42. A circuit connecting tube 44 is arranged inside the connecting support column 42, and a connecting channel that matches the circuit connecting tube 44 is opened between the connecting disc 41 and the connecting support column 42;

[0033] Please refer to Figure 1 and Figure 4 It can be seen that in order to make the device more firmly fixed, the sensor base 2 is provided with a hole matched with the sensor detection head 1, the outer side of the card holder 31 is connected with a card spring 32, the card holder 31 is provided with a card groove matched with the card spring 32, and the upper end of the card holder 31 is provided with a groove matched with the electronic sensor disc 14;

[0034] Please refer to Figure 1 and Figure 6 It can be seen that in order to enhance the durability of the device and increase the service life of the sensor, as a further solution of the utility model, a thermistor 52 is arranged inside the filling and fixing block 51, and a resistor connecting plate 53 is arranged at the front end of the thermistor 52. The outer side of the filling and fixing block 51 is wrapped with an inner fixing layer 54, and the outer side of the inner fixing layer 54 is wrapped with an injection molded part 55 with terminals. The outer side of the injection molded part 55 with terminals is connected to an outer protective layer 56. The filling and fixing block 51 is provided with a groove matching the thermistor 52, the resistor connecting plate 53 and the circuit connecting tube 44. The filling and fixing block 51, the inner fixing layer 54, the injection molded part 55 with terminals and the outer protective layer 56 are provided with a fixing groove matching the connecting support column 42.

[0035] The working principle of the coolant NTC temperature sensor provided by the utility model is as follows:

[0036] The first step: first insert the sensor female end 5 into the coolant, then firmly fix and seal it through the clamping device 3, and then start to use the thermistor 52 to measure the temperature and transmit it to the electronic component 12. The resistance value of the NTC temperature sensor decreases when the temperature rises, and increases when the temperature drops. This characteristic can be used to indirectly measure the temperature by measuring the resistance value.

[0037] Although the embodiments of the present invention have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations or direct or indirect applications may be made to these embodiments without departing from the principles and spirit of the present invention. In other related technical fields, the scope of the present invention is defined by the attached claims and their equivalents, which are equally included in the scope of patent protection of the present invention.

Claims

1. Coolant NTC temperature sensor, characterized in that, include: A sensor probe head (1) for detection and a sensor base (2) for blocking protection, wherein the sensor base (2) is arranged on the outside of the sensor probe head (1), characterized in that: a clamping device (3) is arranged at the upper end of the sensor probe head (1), the upper end of the clamping device (3) is connected to a connecting support structure (4), and the upper end of the connecting support structure (4) is connected to a sensor female end (5); The sensor detection head (1) comprises an injection molded part sleeve joint (11), and the injection molded part sleeve joint (11) is arranged at the central bottom of the clamping device (3); The clamping device (3) comprises a clamping seat (31), and the clamping seat (31) is arranged at the upper end of the sensor detection head (1); The connection support structure (4) comprises a connection disc (41), and the connection disc (41) is arranged on the upper end of the clamping device (3); The sensor female end (5) comprises a filling fixing block (51), and the filling fixing block (51) is fixedly connected to the upper end of the connection support structure (4).

2. The coolant NTC temperature sensor according to claim 1, characterized in that: An electronic component (12) is disposed inside the injection molded sleeve joint (11); the upper end of the electronic component (12) is connected to an electronic sensor disc (14) via a component connecting tube (13); and the outer surfaces of the sensor probe (1), the sensor base (2), the clamping device (3), the connecting support structure (4), and the sensor female end (5) are all made of PA66 injection molded parts.

3. The coolant NTC temperature sensor according to claim 2, characterized in that: The injection molded sleeve joint (11) is provided with a groove for matching the electronic component (12) and the component connecting pipe (13).

4. The coolant NTC temperature sensor according to claim 2, characterized in that: The sensor base (2) is provided with a hole that matches the sensor detection head (1), and a clamping spring (32) is clamped on the outer side of the clamping base (31).

5. The coolant NTC temperature sensor according to claim 1, characterized in that: The snap-in card seat (31) is provided with a snap-in groove matched with a snap-in spring (32), and the upper end of the snap-in card seat (31) is provided with a groove matched with an electronic sensor circular plate (14).

6. The coolant NTC temperature sensor according to claim 1, characterized in that: A connecting support column (42) is arranged at the centre of the upper end of the connecting disc (41), two sets of trapezoidal clamping plates (43) are connected to both sides of the connecting support column (42), a circuit connecting tube (44) is arranged inside the connecting support column (42), and a connecting channel matching the circuit connecting tube (44) is provided on the connecting disc (41) and the connecting support column (42).

7. The coolant NTC temperature sensor according to claim 1, characterized in that: The filling and fixing block (51) is provided with a thermistor (52) inside, a resistor connecting plate (53) is provided at the front end of the thermistor (52), an inner fixing layer (54) is wrapped around the outside of the filling and fixing block (51), an injection molded part with terminals (55) is wrapped around the outside of the inner fixing layer (54), and an outer protective layer (56) is connected to the outside of the injection molded part with terminals (55).

8. The coolant NTC temperature sensor according to claim 7, characterized in that: The filling and fixing block (51) is provided with grooves matching the thermistor (52), the resistor connecting plate (53) and the circuit connecting tube (44), and the filling and fixing block (51), the inner fixing layer (54), the injection molded part with terminals (55) and the outer protective layer (56) are provided with fixing grooves matching the connecting support column (42).

Images