A round precise temperature detection device

Abstract

The utility model relates to a kind of round precision temperature detection device, its characteristics include a detection box consisting of box and lid, inner chamber with top open is equipped on box, the bottom surface of box is also equipped with air inlet and outlet hole;A inner cylinder is installed in inner chamber, and the inner cylinder is equipped with working cavity;A heating device, fan assembly, heat preserver test disc are set in working cavity.The utility model passes through the setting inner circulation airflow channel, makes the orderly controllable airflow flow state, to make the temperature of entire inner chamber everywhere more uniform, will not appear local area temperature high or low situation, effectively reduce energy consumption, and high temperature high pressure gas in inner chamber can be discharged from air inlet and outlet hole, greatly shorten the time of waiting air pressure discharge, to improve detection efficiency, simultaneously, after high temperature high pressure gas is discharged, when opening lid, will not be hurt by gas spouting, not only ensure the safety of artificial inspection, but also ensure that inspection machine is not easily damaged.

Description

Technical Field

[0001] This utility model relates to the field of thermal insulation device manufacturing, and in particular to a temperature detection device for detecting whether a thermal insulation device has disconnected due to heat. Background Technology

[0002] As a key component for circuit overheat protection, the reliability of thermal breakers directly affects the safety and lifespan of end products. Therefore, they must undergo effective testing before leaving the factory to ensure that the moving and fixed contacts of each thermal breaker can separate when the circuit overheats, in order to meet the preset shipment quality standards. Among existing thermal breaker temperature detection devices, a patent application published in Chinese patent literature, number 201520839619.1, entitled "A High-Temperature Resistance Testing Furnace for Thermal Breakers," mainly consists of a chamber, a high-temperature resistant glass cover, a blower, a high-temperature resistant fixing plate with a thermal breaker testing socket, air guide louvers, a rotating shaft, a heating device, and a fan. In use, multiple thermal insulators are inserted into their test sockets. A high-temperature resistant mounting plate is then placed inside the chamber and fitted onto a blower. The blower, fan, and heating device heat the inside of the chamber, causing the thermal insulators in their sockets to heat up and disconnect the moving and fixed contacts. Finally, the high-temperature resistant glass cover is opened to check if the moving and fixed contacts of the thermal insulators are separated, thus determining the condition of the thermal insulators. However, in practical applications, this testing furnace still has the following shortcomings: First, the design lacks an air circulation channel inside the casing. When the fan blows out hot air, the air diffuses irregularly within the casing, resulting in highly turbulent airflow. This turbulence leads to uneven heat distribution, with the area directly blowing the thermal protector having a lower temperature and the stagnant area at the top of the casing having a higher temperature. This necessitates setting the heating temperature of the heating device higher to ensure more accurate temperature detection by the thermal protector, ultimately resulting in higher energy consumption.

[0003] Secondly, the chamber in this design lacks an exhaust system. After heating, the high temperature and pressure inside the chamber necessitate a slow release of internal pressure through the gap between the chamber and the high-temperature resistant glass cover, resulting in a lengthy waiting time and significantly reducing testing efficiency. If the high-temperature resistant glass cover is opened before the internal and external pressures are balanced, the resulting high-temperature, high-pressure gas will cause damage to both manual inspectors and the machine itself.

[0004] Therefore, given the aforementioned shortcomings of the temperature detection devices in existing thermal protectors, the applicant believes it is essential to redesign and improve their structure in order to better meet the practical needs of users. Utility Model Content

[0005] The purpose of this invention is to solve the above-mentioned problems and shortcomings by providing a circular precision temperature detection device. This circular precision temperature detection device, through the setting of an internal circulating airflow channel, makes the airflow state orderly and controllable, so that the temperature in the entire inner chamber is more uniform and there will be no local areas with excessively high or low temperatures, effectively reducing energy consumption. Moreover, the high-temperature and high-pressure gas in the inner chamber can be released from the inlet and outlet vents, greatly shortening the waiting time for the gas pressure to be released, thereby improving detection efficiency. At the same time, after the high-temperature and high-pressure gas is released, there will be no injury from the gas spray when the cover is opened, which not only ensures the safety of manual inspection, but also ensures that the inspection machine is not easily damaged.

[0006] The technical solution of this utility model is implemented as follows: A circular precision temperature detection device, characterized in that it includes a detection box composed of a box body and a box cover. The box body has an inner cavity with an open top. The bottom surface of the box body also has an air inlet and outlet hole that penetrates into the inner cavity. The bottom surface of the box body also has a switch switching mechanism for opening and closing the air inlet and outlet hole. The box cover is installed on the open top of the inner cavity. An inner cylinder body is fitted into the inner cavity. The top surface, outer side wall, and bottom surface of the inner cylinder body are separated from the inner cavity by a space gap. The inner cylinder body has a working chamber with an open top. The bottom surface of the inner cylinder body also has an airflow through hole that penetrates into the working chamber. The airflow through hole, the working chamber, and the space gap are interconnected and constitute an internal circulation airflow channel. A heating device, a fan assembly, and a thermal insulation test plate are arranged in the working chamber.

[0007] Preferably, the heating device, fan assembly, and thermal insulation test plate are arranged sequentially from bottom to top in the working chamber.

[0008] Preferably, the heating device includes a heating element and a support frame, wherein the heating element is connected to the working chamber via the support frame.

[0009] Preferably, the fan assembly includes an impeller, a rotating shaft, a motor, a drive wheel, a driven wheel, and a connecting belt. The impeller and the rotating shaft are respectively arranged in the working chamber. One end of the rotating shaft is connected to the impeller, and the other end of the rotating shaft passes through the inner cylinder and the housing in sequence and extends to the bottom of the housing. The driven wheel is fixed to the other end of the rotating shaft, and the drive wheel is fixed to the power output end of the motor. The connecting belt connects the driven wheel and the drive wheel respectively.

[0010] Preferably, the thermal protector test plate is provided with an arc-shaped airflow perforation that runs through its top and bottom surfaces, and the top surface of the thermal protector test plate is also provided with terminal clamps arranged on both sides of the arc-shaped airflow perforation.

[0011] Preferably, the bottom of the inner cavity is further provided with a support frame to support and lift the inner cylinder.

[0012] Preferably, the switch switching mechanism includes a turntable and an electric actuator. The turntable has a first through hole that is connected to and communicates with the air inlet and outlet. The turntable is rotatably connected to the bottom surface of the housing. The electric actuator is fixed to the bottom surface of the housing, and the movable end of the electric actuator is hinged to the turntable. The turntable is driven to rotate by the electric actuator so that the first through hole is connected to and communicates with the air inlet and outlet or the turntable blocks the air inlet and outlet.

[0013] Preferably, the present invention further includes a housing with a base plate, the top surface of the housing is provided with a fitting hole, the housing is fitted onto the box body through the fitting hole, the bottom of the box body is connected to the base plate, the base plate is provided with a second through hole that communicates with the first through hole, the turntable and the electric push rod are both set on the bottom surface of the base plate, and the first through hole communicates with the air inlet and outlet through the second through hole.

[0014] Preferably, a heat insulation pipe is connected between the air inlet / outlet and the second through hole; a supporting baffle plate mounted on the bottom plate is also provided on the four edges of the bottom surface of the box, so that the box, the supporting baffle plate and the bottom plate enclose and form a heat insulation chamber.

[0015] Preferably, the lid is a double-layer vacuum insulation structure; the body is a double-layer vacuum insulation structure.

[0016] The beneficial effects of this utility model are as follows: When the switching mechanism blocks the air inlet and outlet, this utility model sets up an internal circulation airflow channel, which enables the airflow to flow in an orderly and controllable manner and be evenly distributed throughout the inner chamber. This makes the temperature throughout the entire inner chamber more uniform, preventing local areas from being too high or too low. This makes the temperature environment of the entire inner chamber closer to the actual operating environment of the thermal protector, resulting in higher test accuracy of the thermal protector. Moreover, by utilizing the internal circulation airflow channel to circulate the internal hot air, heat is less likely to be lost to the outside, resulting in higher heating efficiency and effectively reducing the overall energy consumption of the machine. Furthermore, by inlet / outlet vents and a switch mechanism on the bottom of the chamber, the switch can be activated after heating to open the vents, allowing them to connect with the outside air. This enables the high-temperature, high-pressure gas in the internal chamber to escape through the vents, significantly reducing the waiting time for gas pressure release and improving testing efficiency. Simultaneously, after the high-temperature, high-pressure gas has escaped, there is no risk of injury from the escaping gas when opening the chamber lid, ensuring not only the safety of manual inspection but also minimizing damage to the inspection machine. At the same time, by placing the vents on the bottom of the chamber, the high-temperature, high-pressure gas will not be sprayed towards personnel during release, further enhancing safety. Attached Figure Description

[0017] Figure 1 This is one of the overall structural schematic diagrams of this utility model.

[0018] Figure 2 This is the second schematic diagram of the overall structure of this utility model.

[0019] Figure 3 This is a cross-sectional structural diagram of the present invention.

[0020] Figure 4 This is a cross-sectional structural diagram of the detection box, inner cylinder and bottom plate of this utility model.

[0021] Figure 5 This is a schematic diagram showing the disassembled structure of the thermal insulation device test plate, inner cylinder, and box body of this utility model.

[0022] Figure 6 This is a schematic diagram showing the disassembled structure of the box body and the bottom plate of this utility model.

[0023] Figure 7 This is a three-dimensional structural diagram of the fan assembly of this utility model. Detailed Implementation

[0024] like Figure 3 , Figure 4 and Figure 5 As shown, the circular precision temperature detection device of this utility model includes a detection box 100 composed of a box body 1 and a box cover 2. The box body 1 is provided with an inner cavity 101 with an open top, and the bottom surface of the box body 1 is also provided with an air inlet / outlet hole 11 that penetrates into the inner cavity 101. Figure 2 As shown, the bottom surface of the housing 1 is also provided with a switch mechanism 3 for opening and closing the air inlet and outlet ports 11. The housing cover 2 is installed on the opening of the inner cavity 101. An inner cylinder 4 is fitted into the inner cavity 101, and a space gap 102 is formed between the top surface, outer side wall, and bottom surface of the inner cylinder 4 and the inner cavity 101. The inner cylinder 4 has a working chamber 103 with an open top. The bottom surface of the inner cylinder 4 is also provided with an airflow through hole 41 that penetrates into the working chamber 103. The airflow through hole 41, the working chamber 103, and the space gap 102 are interconnected and constitute an internal circulation airflow channel 104. A heating device 5, a fan assembly 6, and a thermal insulation test plate 7 are provided in the working chamber 103. In practical applications, by blocking the air inlet and outlet ports 11 through the switch mechanism 3, hot air can be circulated in the internal circulation airflow channel 104.

[0025] like Figure 3As shown, the heating device 5, fan assembly 6, and thermal insulation test plate 7 are arranged sequentially from bottom to top in the working chamber 103. By setting up the internal circulation airflow channel 104, the stratification phenomenon of natural convection is broken, thereby achieving uniform heat diffusion and significantly improving the problem of excessively high top temperature. Based on the principle that hot air rises and cold air sinks, the arrangement of the heating device 5, fan assembly 6, and thermal insulation test plate 7 ensures that the thermal insulation device is always in the position of the current highest temperature environment, thus making the temperature sensing detection of the thermal insulation device more thorough and effective.

[0026] To further improve the structure of heating device 5, making it simpler and easier to install, such as... Figure 3 and Figure 4 As shown, the heating device 5 includes a heating element 51 and a supporting frame 52. The heating element 51 is connected to the working chamber 103 via the supporting frame 52. Specifically, the heating element 51 is connected to the bottom of the working chamber 103 via the supporting frame 52, and the supporting frame 52 supports and elevates the heating element 51. Elevating the heating element 51 allows the circulating air to fully contact and slide over it, thus improving heat conduction. In practical applications, the heating element 51 uses existing heating components used for heating and detecting the operation of thermal protectors; its specific structure and heating principle will not be elaborated upon here. In practical applications, the supporting frame 52 can also pass through the bottom of the inner cylinder 4 and be fixed to the bottom of the inner chamber 101.

[0027] To further improve the structure of fan assembly 6, making it simpler, easier to implement, and easier to manufacture, such as... Figure 3 and Figure 7 As shown, the fan assembly 6 includes an impeller 61, a rotating shaft 62, a motor 63, a drive wheel 64, a driven wheel 65, and a connecting belt 66. The impeller 61 and the rotating shaft 62 are respectively arranged in the working chamber 103. One end of the rotating shaft 62 is connected to the impeller 61, and the other end of the rotating shaft 62 passes through the inner cylinder 4 and the housing 1 in sequence, extending to the bottom of the housing 1. The driven wheel 65 is fixed to the other end of the rotating shaft 62, and the drive wheel 64 is fixed to the power output end of the motor 63. The connecting belt 66 connects the driven wheel 65 and the drive wheel 64 respectively. Specifically, the impeller 61 is located above the heating element 51. This structural design allows the motor 63 to be placed outside the housing 1, thus making the motor 63 less susceptible to damage from high temperatures and improving its service life. By setting the drive wheel 64, the driven wheel 65, and the connecting belt 66, it is easy to connect the motor 63 and the rotating shaft 62 together.

[0028] To further improve the structure of the thermal insulation test plate 7, making it simpler, easier to implement, and easier to manufacture, such as... Figure 4 As shown, the thermal protector test plate 7 has an arc-shaped airflow perforation 71 penetrating its top and bottom surfaces. The top surface of the thermal protector test plate 7 also has terminal clamping seats 72 arranged on both sides of the arc-shaped airflow perforation 71. By setting the terminal clamping seats 72, the terminals at both ends of the thermal protector can be clamped and fixed, allowing the bimetallic strip between the two terminals to be positioned directly above the arc-shaped airflow perforation 71, thus making the thermal protector's temperature sensing detection more thorough and effective. In practical applications, multiple terminal clamping seats 72 are used on both sides of the arc-shaped airflow perforation 71, allowing multiple thermal protectors to be tested simultaneously. Specifically, the terminal clamping seat 72 consists of two contacting spring pieces, allowing the thermal protector to be placed on the thermal protector test plate 7 in a side-lying position, so that the hot airflow can fully contact and flow through the bimetallic strip of the thermal protector, making the thermal protector's temperature sensing detection more thorough and effective. In practical applications, such as... Figure 5 As shown, the thermal insulation test plate 7 is connected to the cavity wall of the working chamber 103 via multiple inverted L-shaped connectors 73. In practical applications, there are multiple arc-shaped airflow perforations 71, which are arranged axially around the thermal insulation test plate 7.

[0029] In order to keep the formation of the space gap 102 unchanged, such as Figure 5 As shown, the bottom of the inner cavity 101 is also provided with a support frame 42 to support and lift the inner cylinder 4. Specifically, there are multiple support frames 42, preferably three, so as to support the inner cylinder 4 more stably. More specifically, the upper end of the support frame 42 is provided with a fork-shaped fork head, and the bottom of the inner cylinder 4 is provided with an insertion hole for inserting the fork head.

[0030] To further improve the structure of the switch switching mechanism 3, making it simpler, easier to implement, and easier to manufacture, such as... Figure 2 As shown, the switch mechanism 3 includes a turntable 31 and an electric actuator 32. The turntable 31 has a first through hole 311 that communicates with the air inlet / outlet 11. The turntable 31 is rotatably connected to the bottom surface of the housing 1. The electric actuator 32 is fixed to the bottom surface of the housing 1, and its movable end is hinged to the turntable 31. The electric actuator 32 drives the turntable 31 to rotate, thereby connecting the first through hole 311 with the air inlet / outlet 11 or blocking the air inlet / outlet 11. When the first through hole 311 is connected with the air inlet / outlet 11, it can conduct air to the outside. When the first through hole 311 is misaligned with the air inlet / outlet 11, it does not conduct air to the outside, thus blocking the air inlet / outlet 11. Specifically, the movable end of the electric actuator 32 is hinged at a position near the outer circumferential edge of the turntable 31.

[0031] To improve safety protection performance, such as Figure 1 and Figure 3 As shown, this utility model also includes a housing 8 with a base plate 81. The top surface of the housing 8 has a fitting hole 82, through which the housing 8 is fitted onto the box body 1. The bottom of the box body 1 is connected to the base plate 81. The base plate 81 has a second through hole 811 that communicates with the first through hole 311. The turntable 31 and the electric push rod 32 are both located on the bottom surface of the base plate 81, and the first through hole 311 communicates with the air inlet / outlet 11 through the second through hole 811. By setting the base plate 81 and the housing 8, the box body 1 can be directly covered and enclosed over a large area, preventing operators from being burned by contact and improving operational safety. At the same time, it also serves as heat insulation, reducing the outward dissipation of heat from the surface of the detection box 100, thereby reducing heating energy consumption.

[0032] To further prevent burns from operator contact and to prevent heat from dissipating, such as Figure 4 and Figure 6 As shown, a heat insulation pipe 9 connects the air inlet / outlet 11 and the second through hole 811. Supporting baffles 12, mounted on the base plate 81, are also provided around the bottom edge of the housing 1, forming a heat insulation chamber 105 between the housing 1, the supporting baffles 12, and the base plate 81. By providing the heat insulation chamber 105, heat from the bottom of the housing 1 is stored within it, preventing heat dissipation and significantly reducing heating energy consumption. It also prevents heat transfer to the casing 8, protecting operators from burns and improving safety. The heat insulation pipe 9 connects the air inlet / outlet 11 and the second through hole 811, guiding the high-temperature, high-pressure gas to flow smoothly out of the chamber without leaking into the heat insulation chamber 105, making it more reliable.

[0033] To further prevent operators from being burned by touching the equipment, and to prevent heat from dissipating, such as Figure 4 As shown, the lid 2 has a double-layer vacuum insulation structure; the body 1 has a double-layer vacuum insulation structure. This can completely block heat loss, significantly improve the heat preservation and energy saving effect, and reduce the outer surface temperature of the lid 2 and the body 1. It also reduces the risk of injury to operators when they touch it, improving operational safety. Specifically, the body 1 includes an inner cylinder and an outer cylinder nested together. The upper end of the inner cylinder and the upper end of the outer cylinder are sealed together by an upper sealing plate, and the lower end of the inner cylinder and the lower end of the outer cylinder are sealed together by a lower sealing plate. The lower sealing plate also seals the lower end of the inner cylinder. The air inlet / outlet 11 is located on the lower sealing plate. The supporting baffle 12 is located on the lower sealing plate. The lid 2 includes an upper cover plate, a lower cover plate, and a baffle connecting the upper and lower cover plates. The lower cover plate has a fitting hole for fitting onto the upper end of the body 1. To facilitate lifting the lid 2, as... Figure 1 As shown, the lid 2 is also provided with a handle 21.

[0034] In practical applications, there are multiple air inlets / outlets 11, first through holes 311, and second through holes 811, and the number of air inlets / outlets 11, first through holes 311, and second through holes 811 is the same.

[0035] In practical applications, such as Figure 1 and Figure 4 As shown, the box body 1 is a circular box structure, and the box cover 2 is a circular box cover structure.

Claims

1. A circular precision temperature detection device, characterized in that: include A testing box (100) is composed of a box body (1) and a box cover (2). The box body (1) is provided with an inner cavity (101) with an open top. The bottom surface of the box body (1) is also provided with an air inlet and outlet hole (11) that penetrates into the inner cavity (101). The bottom surface of the box body (1) is also provided with a switch switching mechanism (3) for opening and blocking the air inlet and outlet hole (11). The box cover (2) is installed on the open top of the inner cavity (101). An inner cylinder (4) is installed in an inner cavity (101), and a space gap (102) is formed between the top surface, outer side wall, bottom surface of the inner cylinder (4) and the inner cavity (101). The inner cylinder (4) is provided with a working cavity (103) with an open top. An airflow through hole (41) is provided on the bottom surface of the inner cylinder (4) and extends into the working cavity (103). The airflow through hole (41), the working cavity (103), and the space gap (102) are interconnected and constitute an internal circulation airflow channel (104). A heating device (5), a fan assembly (6), and a thermal insulation test plate (7) are installed in the working chamber (103).

2. The circular precision temperature detection device according to claim 1, characterized in that: The heating device (5), fan assembly (6), and thermal insulation test plate (7) are arranged in the working chamber (103) from bottom to top.

3. The circular precision temperature detection device according to claim 2, characterized in that: The heating device (5) includes a heating element (51) and a support frame (52), wherein the heating element (51) is connected to the working chamber (103) through the support frame (52).

4. The circular precision temperature detection device according to claim 2, characterized in that: The fan assembly (6) includes an impeller (61), a rotating shaft (62), a motor (63), a drive wheel (64), a driven wheel (65), and a connecting belt (66). The impeller (61) and the rotating shaft (62) are respectively arranged in the working chamber (103). One end of the rotating shaft (62) is connected to the impeller (61), and the other end of the rotating shaft (62) passes through the inner cylinder (4) and the box (1) in sequence and extends to the bottom of the box (1). The driven wheel (65) is fixed to the other end of the rotating shaft (62), and the drive wheel (64) is fixed to the power output end of the motor (63). The connecting belt (66) connects the driven wheel (65) and the drive wheel (64) respectively.

5. The circular precision temperature detection device according to claim 2, characterized in that: The thermal insulation test plate (7) is provided with an arc-shaped airflow perforation (71) that runs through its top and bottom surfaces. The top surface of the thermal insulation test plate (7) is also provided with terminal clamps (72) arranged on both sides of the arc-shaped airflow perforation (71).

6. The circular precision temperature detection device according to claim 1, characterized in that: The bottom of the inner cavity (101) is also provided with a support frame (42) to support the inner cylinder (4).

7. The circular precision temperature detection device according to claim 1, characterized in that: The switch switching mechanism (3) includes a turntable (31) and an electric push rod (32). The turntable (31) is provided with a first through hole (311) that is connected to the air inlet and outlet (11). The turntable (31) is rotatably connected to the bottom surface of the housing (1). The electric push rod (32) is fixed to the bottom surface of the housing (1), and the movable end of the electric push rod (32) is hinged to the turntable (31) so that the turntable (31) can be driven to rotate by the electric push rod (32) so that the first through hole (311) is connected to the air inlet and outlet (11) or the turntable (31) can block the air inlet and outlet (11).

8. The circular precision temperature detection device according to claim 7, characterized in that: It also includes a housing (8) with a base plate (81), and a fitting hole (82) is provided on the top surface of the housing (8). The housing (8) is fitted onto the box (1) through the fitting hole (82). The bottom of the box (1) is connected to the base plate (81). The base plate (81) is provided with a second through hole (811) that communicates with the first through hole (311). The turntable (31) and the electric push rod (32) are both set on the bottom surface of the base plate (81), and the first through hole (311) communicates with the air inlet and outlet (11) through the second through hole (811).

9. The circular precision temperature detection device according to claim 8, characterized in that: The air inlet / outlet (11) and the second through hole (811) are connected by a heat insulation pipe (9); the bottom surface of the box (1) is also provided with a support baffle (12) mounted on the bottom plate (81) so that the box (1), the support baffle (12) and the bottom plate (81) are enclosed to form a heat insulation chamber (105).

10. The circular precision temperature detection device according to claim 1, characterized in that: The lid (2) is a double-layer vacuum insulation structure; the body (1) is a double-layer vacuum insulation structure.

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