An NTC temperature sensor for building automation systems

Abstract

The present invention relates to the technical field of NTC temperature sensors and specifically discloses an NTC temperature sensor for a building automation system. The NTC temperature sensor comprises: a fixed sleeve having a cylindrical structure and an insertion port at one end thereof; an elastic sensing component slidably connected to the inner wall of the insertion port; the elastic sensing component is made of a durable metal material and can be replaced with different elastic sensing components according to different usage environments, facilitating sensor recycling; and a positioning component disposed within the fixed sleeve and fixedly connected to the inner wall of the fixed sleeve for positioning the elastic sensing component. The NTC temperature sensor for a building automation system can be replaced with different elastic sensing components according to different usage environments, facilitating sensor recycling.

Description

Technical Field

[0001] The present invention relates to the technical field of NTC temperature sensors, in particular to an NTC temperature sensor for a building automatic control system. Background Art

[0002] An NTC temperature sensor is a thermistor or probe. Its principle is that, under a certain measurement power, the resistance of an NTC thermistor decreases rapidly as the temperature rises. This characteristic allows the NTC thermistor to be used to determine the corresponding temperature by measuring its resistance, thereby achieving temperature detection and control. It is typically composed of two or three metal oxides, mixed in a fluid-like clay, and calcined in a high-temperature furnace to form a dense sintered ceramic. Actual sizes are very flexible, and they can be as small as 0.010 inches or very small diameters. Maximum size is virtually unlimited.

[0003] However, the sensors currently used can usually only be specially made for different usage environments. When the usage environment changes, the corresponding sensors need to be replaced. Even if they can be recycled, they need to be reprocessed, which makes it inconvenient to reuse the sensors. Summary of the Invention

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: an NTC temperature sensor for a building automation system, comprising:

[0005] A fixed sleeve having a cylindrical structure and an insertion port at one end thereof. An elastic sensor component is slidably connected to the inner wall of the insertion port. The elastic sensor component is made of a resilient metal material. Different elastic sensor components can be replaced according to different usage environments, making it convenient for the sensor to be recycled.

[0006] A positioning assembly is disposed inside the fixed sleeve and fixedly connected to the inner wall of the fixed sleeve, and is used to position the elastic sensing assembly;

[0007] a thermistor, the thermistor being disposed inside the fixed sleeve at a position on one side of the positioning assembly, the thermistor being fixedly connected to the inner wall of the fixed sleeve;

[0008] A heat-conducting component is fixed to a side of the thermistor close to the positioning component, the heat-conducting component is fixedly connected to the inner wall of the fixed sleeve, and the side of the heat-conducting component away from the thermistor is in contact with the elastic sensing component;

[0009] A lead wire, one end of which is arranged inside the fixed sleeve, and the end of the lead wire located inside the fixed sleeve is electrically connected to the thermistor.

[0010] Preferably, the elastic sensing component includes a positioning column, fixing grooves are provided on both sides of the positioning column, one end of the positioning column is fixedly connected to a connector, metal springs are fixedly connected to both sides of the connector, and the end of the metal spring away from the connector is fixedly connected to a thermally conductive spring, so that the thermally conductive spring can contact the surface of the device to be detected as much as possible, thereby improving the heat conduction efficiency, and the contact area is large, which can avoid detection errors caused by local temperature differences, making the detection results more accurate. When it is necessary to detect the ambient temperature, the contact area with the air environment can also be increased by using the thermally conductive spring and the metal spring, thereby making the detection results more accurate.

[0011] Preferably, the positioning post is arranged inside the fixed sleeve, and the positioning post is slidably connected to the inner wall of the plug-in port.

[0012] Preferably, the elastic sensing component can also be replaced by a folding sensing component, which includes a positioning rod, positioning grooves are provided on both sides of the positioning rod, and one end of the positioning rod is fixedly connected to a winding rod, and a metal soft film is wrapped and fixedly connected on the winding rod, which is convenient for adapting to use in relatively narrow spaces, and the metal soft film can be wound on the winding rod, and the heat-conducting components are not easily damaged when stored. At the same time, it can adapt to narrow environments of different sizes according to the amount of expansion of the metal soft film. It has good adaptability and can expand the heat-conducting contact area as much as possible according to the size of the narrow space.

[0013] Preferably, the positioning rod is arranged inside the fixed sleeve, and the positioning rod is slidably connected to the inner wall of the plug interface.

[0014] Preferably, the positioning assembly includes a positioning seat, a guide plate is fixedly connected to one side of the positioning seat, a telescopic slot is opened at the end of the positioning seat, an arc-shaped clamping block is slidably connected to the inner wall of the telescopic slot, and one end of the arc-shaped clamping block located inside the telescopic slot is fixedly connected to a telescopic spring, and the end of the telescopic spring away from the arc-shaped clamping block is fixedly connected to the inner wall of the telescopic slot. When replacing, it can be directly plugged in and out, and the replacement operation is relatively convenient.

[0015] Preferably, the positioning seat is arranged inside the fixed sleeve and fixedly connected to the inner wall of the fixed sleeve, and the guide piece is arranged at an angle.

[0016] Preferably, the heat-conducting assembly includes a heat-conducting base, one side of the heat-conducting base is fixedly connected to an arc-shaped spring sheet, and the end of the arc-shaped spring sheet away from the heat-conducting base is fixedly connected to a heat-conducting sleeve, and the heat-conducting sleeve can be in close contact with the positioning post to improve the heat-conducting efficiency, and the positioning post is inserted into the heat-conducting sleeve so that the heat-conducting sleeve can be wrapped around the outside of the positioning post, thereby increasing the contact area between the heat-conducting sleeve and the positioning post, and facilitating heat conduction;

[0017] Preferably, the bottom of the heat-conducting base is fixedly connected to the thermistor, and the arc-shaped springs are provided in multiple groups and are evenly distributed between the heat-conducting base and the heat-conducting sleeve.

[0018] It has the following beneficial effects:

[0019] 1. The NTC temperature sensor used in this building automation system has an elastic sensing component that can slide inside the plug interface and can be fixed by a positioning component. Therefore, different elastic sensing components can be replaced according to different usage environments, making it convenient for the sensor to be recycled.

[0020] 2. When installing the elastic sensing component of the NTC temperature sensor used in the building automation system, the positioning column is inserted into the thermal conductive component inside the fixed sleeve through the plug interface, and the positioning column is fixed by the positioning component and the fixing groove. The installation of the elastic sensing component can be completed. Since the thermal conductive spring and the metal spring are provided, the thermal conductive spring can be squeezed onto the device whose temperature needs to be detected, and the thermal conductive spring is pressed by the extrusion force. The elastic deformation of the thermal conductive spring and the metal spring allows the thermal conductive spring to contact the surface of the device to be detected as much as possible, thereby improving the heat conduction efficiency. The large contact area can avoid detection errors caused by local temperature differences, making the detection results more accurate. When it is necessary to detect the ambient temperature, the contact area with the air environment can also be increased by the thermal conductive spring and the metal spring, thereby making the detection results more accurate.

[0021] 3. When installing the folding sensor assembly, the NTC temperature sensor used in the building automatic control system is installed by inserting the positioning rod into the thermal conductive assembly inside the fixed sleeve through the plug interface, and fixing the positioning rod by cooperating with the positioning groove of the positioning assembly to complete the installation of the folding sensor assembly. When it is necessary to detect the temperature in a narrow space, the metal film can be unfolded from the winding rod, and then the metal film is driven by the winding rod to insert into the narrow space. The heat is conducted to the thermal conductive assembly through the metal film, and then the heat is conducted to the thermistor through the thermal conductive assembly, which is convenient for adapting to use in relatively narrow spaces. The metal film can be wound on the winding rod, and the thermal conductive components are not easily damaged when stored. At the same time, the amount of unfolding of the metal film can adapt to narrow environments of different sizes. It has good adaptability and can expand the thermal contact area as much as possible according to the size of the narrow space.

[0022] 4. The NTC temperature sensor used in the building automatic control system, when the positioning column is inserted into the fixed sleeve through the plug interface, the positioning column squeezes the arc-shaped block, and the arc-shaped block slides into the inside of the telescopic slot after being squeezed, and compresses the telescopic spring. When the fixed slot on the positioning rod moves to a position facing the arc-shaped block, the elastic force of the telescopic spring pushes the arc-shaped block into the inside of the fixed slot. The positioning rod can be fixed by the cooperation of the arc-shaped block and the fixed slot. When replacement is needed, directly pull the positioning column, and the positioning column drives the fixed slot to move, squeezing the arc-shaped block through the inner wall of the fixed slot. After being squeezed, the arc-shaped block slides into the inside of the telescopic slot and exits from the inside of the fixed slot, and the positioning column can be pulled out. When replacing, just plug and unplug, and the replacement operation is relatively convenient.

[0023] 5. The NTC temperature sensor used in this building automation system has the following characteristics: when the positioning post is inserted into the fixed sleeve, the end of the positioning post is inserted into the thermal sleeve. As the positioning post is inserted and squeezes the thermal sleeve, the thermal sleeve moves toward the thermal base under the action of the squeezing force and compresses the arc-shaped spring piece. The elastic force of the arc-shaped spring piece can press the thermal sleeve onto the positioning post, so that the thermal sleeve can be in close contact with the positioning post, thereby improving the heat conduction efficiency. In addition, the insertion of the positioning post into the thermal sleeve can make the thermal sleeve wrapped around the outside of the positioning post, thereby increasing the contact area between the thermal sleeve and the positioning post, facilitating heat conduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the structure of an NTC temperature sensor used in the building automation system of the present invention;

[0025] Figure 2 This is a schematic diagram of the internal structure of the fixed sleeve of the present invention;

[0026] Figure 3 This is a schematic structural diagram of the elastic sensing component of the present invention;

[0027] Figure 4 This is a schematic diagram of the structure of the foldable sensor assembly of the present invention;

[0028] Figure 5 This is a schematic diagram of the positioning component structure of the present invention;

[0029] Figure 6 This is a schematic diagram of the internal structure of the expansion slot of the present invention;

[0030] Figure 7 Schematic diagram of the heat conduction component structure of the present invention.

[0031] In the figure: 1. Fixed sleeve; 2. Plug interface; 3. Elastic sensing assembly; 31. Positioning column; 32. Fixed groove; 33. Connector; 34. Metal spring; 35. Thermal spring; 4. Positioning assembly; 41. Positioning seat; 42. Guide plate; 43. Telescopic groove; 44. Arc-shaped block; 45. Telescopic spring; 5. Thermistor; 6. Thermal assembly; 61. Thermal base; 62. Arc-shaped spring; 63. Thermal sleeve; 7. Lead; 8. Folding sensing assembly; 81. Positioning rod; 82. Positioning groove; 83. Winding rod; 84. Metal film. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] See also Figures 1-4 The present invention provides a technical solution: an NTC temperature sensor for a building automation system, comprising:

[0034] A fixed sleeve 1 having a cylindrical structure and an insertion port 2 at one end thereof, wherein an elastic sensing component 3 is slidably connected to the inner wall of the insertion port 2, and the elastic sensing component 3 is made of a metal material with a strong capacity;

[0035] A positioning assembly 4 is provided inside the fixed sleeve 1 and is fixedly connected to the inner wall of the fixed sleeve 1. The positioning assembly 4 is used to position the elastic sensing assembly 3.

[0036] Thermistor 5 is arranged inside the fixed sleeve 1 at a position on one side of the positioning component 4, and the thermistor 5 is fixedly connected to the inner wall of the fixed sleeve 1;

[0037] The heat conducting component 6 is fixed to the side of the thermistor 5 close to the positioning component 4, the heat conducting component 6 is fixedly connected to the inner wall of the fixed sleeve 1, and the side of the heat conducting component 6 away from the thermistor 5 is in contact with the elastic sensing component 3;

[0038] A lead wire 7, one end of which is disposed inside the fixed sleeve 1, and the end of the lead wire 7 located inside the fixed sleeve 1 is electrically connected to the thermistor 5;

[0039] Since the elastic sensor component 3 can slide inside the plug interface 2 and can be fixed by the positioning component 4, different elastic sensor components 3 can be replaced according to different usage environments, making it convenient to recycle the sensor.

[0040] The elastic sensing assembly 3 includes a positioning post 31, with fixing grooves 32 formed on both sides of the positioning post 31. One end of the positioning post 31 is fixedly connected to a connector 33, and both sides of the connector 33 are fixedly connected to metal springs 34. The end of the metal spring 34 away from the connector 33 is fixedly connected to a heat-conducting spring 35. The positioning post 31 is disposed inside the fixed sleeve 1 and is slidably connected to the inner wall of the plug interface 2.

[0041] When installing the elastic sensing component 3, the positioning column 31 is inserted into the heat-conducting component 6 inside the fixed sleeve 1 through the plug-in interface 2, and the positioning column 31 is fixed by the positioning component 4 in conjunction with the fixing groove 32, and the installation of the elastic sensing component 3 is completed. Since the thermal conductive spring 35 and the metal spring 34 are provided, the thermal conductive spring 35 can be squeezed onto the device whose temperature needs to be detected, and the thermal conductive spring 35 is pressed by the extrusion force. The elastic deformation of the thermal conductive spring 35 and the metal spring 34 allows the thermal conductive spring 35 to contact the surface of the device to be detected as much as possible, thereby improving the heat conduction efficiency, and the contact area is large, which can avoid the detection error caused by local temperature differences, making the detection result more accurate. When the ambient temperature needs to be detected, the contact area with the air environment can also be increased by the thermal conductive spring 35 and the metal spring 34, thereby making the detection result more accurate.

[0042] The elastic sensing assembly 3 can also be replaced by a folding sensing assembly 8, which includes a positioning rod 81, with positioning grooves 82 on both sides of the positioning rod 81. One end of the positioning rod 81 is fixedly connected to a winding rod 83, and a metal soft film 84 is wound and fixedly connected to the winding rod 83. The positioning rod 81 is arranged inside the fixed sleeve 1 and is slidably connected to the inner wall of the plug interface 2.

[0043] When installing the folding sensor component 8, the positioning rod 81 is inserted into the heat-conducting component 6 inside the fixed sleeve 1 through the plug interface 2, and the positioning rod 81 is fixed by the positioning component 4 in conjunction with the positioning groove 82 to complete the installation of the folding sensor component 8. When it is necessary to detect the temperature in a narrow space, the metal soft film 84 can be unfolded from the winding rod 83, and then the metal soft film 84 is driven by the winding rod 83 to be inserted into the narrow space. The heat is conducted to the heat-conducting component 6 through the metal soft film 84, and the heat is conducted to the thermistor 5 through the heat-conducting component 6, which is convenient for adapting to use in relatively narrow spaces. The metal soft film 84 can be wound on the winding rod 83, and the heat-conducting component is not easily damaged when stored. At the same time, the metal soft film 84 can be adapted to narrow environments of different sizes according to the amount of unfolding of the metal soft film 84. It has good adaptability and can expand the heat-conducting contact area as much as possible according to the size of the narrow space.

[0044] See also Figures 1-6The present invention provides a technical solution: the positioning assembly 4 includes a positioning seat 41, one side of the positioning seat 41 is fixedly connected to a guide piece 42, the end of the positioning seat 41 is provided with a telescopic groove 43, the inner wall of the telescopic groove 43 is slidably connected to an arc-shaped clamping block 44, one end of the arc-shaped clamping block 44 located inside the telescopic groove 43 is fixedly connected to a telescopic spring 45, the end of the telescopic spring 45 away from the arc-shaped clamping block 44 is fixedly connected to the inner wall of the telescopic groove 43, the positioning seat 41 is arranged inside the fixed sleeve 1 and fixedly connected to the inner wall of the fixed sleeve 1, and the guide piece 42 is arranged obliquely;

[0045] When the positioning post 31 is inserted into the fixed sleeve 1 through the plug interface 2, the positioning post 31 is squeezed into the arc-shaped block 44. After being squeezed, the arc-shaped block 44 slides into the telescopic slot 43 and compresses the telescopic spring 45. When the fixed slot 32 on the positioning post 31 moves to a position facing the arc-shaped block 44, the elastic force of the telescopic spring 45 pushes the arc-shaped block 44 into the fixed slot 32. The positioning post 31 is fixed by the cooperation of the arc-shaped block 44 and the fixed slot 32. When replacement is needed, the positioning post 31 is directly pulled, and the positioning post 31 drives the fixed slot 32 to move and squeezes the arc-shaped block 44 through the inner wall of the fixed slot 32. After being squeezed, the arc-shaped block 44 slides into the telescopic slot 43 and withdraws from the fixed slot 32. The positioning post 31 can be pulled out. When replacing, it can be directly plugged in and unplugged, and the replacement operation is relatively convenient.

[0046] See also Figure 1-Figure 7 The present invention provides a technical solution: the heat conducting component 6 includes a heat conducting base 61, one side of the heat conducting base 61 is fixedly connected to an arc-shaped spring piece 62, the end of the arc-shaped spring piece 62 away from the heat conducting base 61 is fixedly connected to a heat conducting sleeve 63, the bottom of the heat conducting base 61 is fixedly connected to the thermistor 5, and the arc-shaped spring pieces 62 are provided in multiple groups and are evenly distributed between the heat conducting base 61 and the heat conducting sleeve 63;

[0047] When the positioning post 31 is inserted into the fixed sleeve 1, the end of the positioning post 31 is inserted into the heat-conducting sleeve 63. As the positioning post 31 is inserted and the heat-conducting sleeve 63 is squeezed, the heat-conducting sleeve 63 moves toward the heat-conducting base 61 under the action of the squeezing force and compresses the arc-shaped spring piece 62. The heat-conducting sleeve 63 can be pressed against the positioning post 31 by the elastic force of the arc-shaped spring piece 62, so that the heat-conducting sleeve 63 can be in close contact with the positioning post 31, thereby improving the heat conduction efficiency. In addition, the insertion of the positioning post 31 into the heat-conducting sleeve 63 can make the heat-conducting sleeve 63 wrapped around the outside of the positioning post 31, thereby making the contact area between the heat-conducting sleeve 63 and the positioning post 31 larger, thereby facilitating heat conduction.

[0048] Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without making creative efforts should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention shall be implemented in accordance with conventional means in the field unless otherwise specified or limited.

Claims

1. An NTC temperature sensor for a building automation system, characterized in that: include: A fixed sleeve (1), the fixed sleeve (1) having a cylindrical structure and an insertion port (2) provided at one end thereof, an elastic sensing component (3) being slidably connected to an inner wall of the insertion port (2), and the elastic sensing component (3) being made of metal; A positioning component (4), the positioning component (4) is arranged inside the fixed sleeve (1), the positioning component (4) is fixedly connected to the inner wall of the fixed sleeve (1), and the positioning component (4) is used to position the elastic sensing component (3); a thermistor (5), the thermistor (5) being arranged inside the fixed sleeve (1) at a position on one side of the positioning assembly (4), the thermistor (5) being fixedly connected to the inner wall of the fixed sleeve (1); A heat-conducting component (6), the heat-conducting component (6) being fixed to a side of the thermistor (5) close to the positioning component (4), the heat-conducting component (6) being fixedly connected to the inner wall of the fixed sleeve (1), and the side of the heat-conducting component (6) away from the thermistor (5) being in contact with the elastic sensing component (3); A lead wire (7), one end of which is disposed inside the fixed sleeve (1), and the end of the lead wire (7) located inside the fixed sleeve (1) is electrically connected to the thermistor (5); The elastic sensing component (3) includes a positioning column (31), both sides of the positioning column (31) are provided with fixing grooves (32), one end of the positioning column (31) is fixedly connected to a connector (33), both sides of the connector (33) are fixedly connected to metal springs (34), and one end of the metal spring (34) away from the connector (33) is fixedly connected to a heat-conducting spring (35). The elastic sensing component (3) can also be replaced by a folding sensing component (8), the folding sensing component (8) includes a positioning rod (81), both sides of the positioning rod (81) are provided with positioning grooves (82), one end of the positioning rod (81) is fixedly connected to a winding rod (83), and a metal soft film (84) is wound around and fixedly connected to the winding rod (83).

2. The NTC temperature sensor for a building automation system according to claim 1, wherein: The positioning column (31) is arranged inside the fixed sleeve (1), and the positioning column (31) is slidably connected to the inner wall of the plug interface (2).

3. The NTC temperature sensor for a building automation system according to claim 1, wherein: The positioning rod (81) is arranged inside the fixed sleeve (1), and the positioning rod (81) is slidably connected to the inner wall of the plug interface (2).

4. The NTC temperature sensor for a building automation system according to claim 1, wherein: The positioning assembly (4) includes a positioning seat (41), a guide piece (42) is fixedly connected to one side of the positioning seat (41), a telescopic slot (43) is provided at the end of the positioning seat (41), an arc-shaped clamping block (44) is slidably connected to the inner wall of the telescopic slot (43), an end of the arc-shaped clamping block (44) located inside the telescopic slot (43) is fixedly connected to a telescopic spring (45), and an end of the telescopic spring (45) away from the arc-shaped clamping block (44) is fixedly connected to the inner wall of the telescopic slot (43).

5. The NTC temperature sensor for a building automation system according to claim 4, characterized in that: The positioning seat (41) is arranged inside the fixed sleeve (1) and fixedly connected to the inner wall of the fixed sleeve (1), and the guide piece (42) is arranged at an angle.

6. The NTC temperature sensor for a building automation system according to claim 1, wherein: The heat-conducting assembly (6) comprises a heat-conducting base (61), one side of the heat-conducting base (61) is fixedly connected to an arc-shaped spring piece (62), and one end of the arc-shaped spring piece (62) away from the heat-conducting base (61) is fixedly connected to a heat-conducting sleeve (63).

7. The NTC temperature sensor for a building automation system according to claim 6, characterized in that: The bottom of the heat-conducting base (61) is fixedly connected to the thermistor (5), and the arc-shaped springs (62) are provided in multiple groups and are evenly distributed between the heat-conducting base (61) and the heat-conducting sleeve (63).

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