Temperature testing device for thermal protector

Abstract

The utility model discloses a thermal protector temperature testing device which comprises a testing assembly, a control panel and a wind wheel motor, the testing assembly comprises a wind barrel, a barrel cover assembly, an air duct basin, a centrifugal wind wheel and a socket frame, the socket frame is provided with conductive clamping pieces used for being electrically connected with a thermal protector, and the conductive clamping pieces are uniformly distributed in the circumferential direction. The barrel cover assembly covers the air barrel, the centrifugal wind wheel is arranged on the lower side of the air duct basin, a heating pipe is arranged on the outer side of the centrifugal wind wheel, the wind wheel motor is in driving connection with the centrifugal wind wheel, the conductive clamping piece is arranged above the air supply duct correspondingly, a ventilation opening is formed in the bottom of the air duct basin, and the position of the air suction end of the centrifugal wind wheel corresponds to the ventilation opening. A temperature sensor is arranged on the lower side of the socket frame, on-off indicating lamps are arranged on the control panel, the conductive clamping pieces are electrically connected with the corresponding on-off indicating lamps respectively, and the control circuit is electrically connected with the temperature sensor and the heating tube. The temperature testing device for the thermal protector is beneficial to improving the working efficiency and improving the effectiveness of quality inspection.

Description

Technical Field

[0001] The utility model relates to the field of testing equipment, in particular to a thermal protector temperature testing device. Background Art

[0002] Currently, thermal protectors typically utilize a bimetallic strip. When the temperature reaches the thermal protector's operating temperature, the bimetallic strip deforms, causing the thermal protector to disconnect the circuit. An example of a thermal protector is the "micro thermal protector" (Chinese Utility Model Publication No. CN201142301Y). To ensure reliable thermal protection in household appliances equipped with thermal protectors, they require physical quality inspection. Currently, this is done manually, using a single spot check method. This involves heating the thermal protector with a heating plate and connecting it to a power source. When the thermal protector reaches its designed operating temperature and disconnects, the product is considered qualified. However, this spot check method makes it difficult to increase the number of thermal protectors tested, resulting in low quality inspection efficiency and limited effectiveness. Improvements are necessary. Summary of the Invention

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a thermal protector temperature testing device, which is conducive to improving work efficiency and the effectiveness of quality inspection.

[0004] The purpose of this utility model is achieved through the following technical solutions.

[0005] The thermal protector temperature testing device disclosed in the utility model comprises a testing assembly, a control panel and a wind wheel motor, wherein the testing assembly comprises a wind barrel, a barrel cover assembly, an air duct basin, a centrifugal wind wheel and a socket frame, wherein the socket frame is arranged in a ring shape, and the socket frame is provided with a conductive clip for electrically connecting the thermal protector, and the conductive clip is evenly distributed circumferentially, the air duct basin, the centrifugal wind wheel and the socket frame are arranged in the wind barrel, the barrel cover assembly is arranged on the wind barrel, the centrifugal wind wheel is arranged on the lower side of the air duct basin, the outer side of the centrifugal wind wheel is provided with a heating pipe, and the wind wheel The motor drive is connected to the centrifugal wind wheel, the socket is mounted on the upper side of the air duct basin, an air supply duct is formed between the outer wall of the air duct basin and the inner wall of the wind barrel, the conductive clip is arranged at the corresponding upper side of the air supply duct, a vent is formed at the bottom of the air duct basin, the suction end of the centrifugal wind wheel corresponds to the vent, a temperature sensor is provided on the lower side of the socket rack, an on-off indicator light is provided on the control panel, and the conductive clips are electrically connected to the corresponding on-off indicator lights respectively; it also includes a control circuit, and the control circuit is electrically connected to the temperature sensor and the heating tube.

[0006] Preferably, the test component includes an external circulation exhaust duct and an external circulation air inlet pipe, the external circulation exhaust duct and the external circulation air inlet pipe are arranged on the barrel cover assembly, one end of the external circulation exhaust duct is connected to the upper part of the wind barrel, the external circulation air inlet pipe is arranged upright, and the lower end of the external circulation air inlet pipe is located on the corresponding upper side of the vent, the test component includes an external circulation air regulating valve assembly for regulating the flow of the external circulation exhaust duct and the flow of the external circulation air inlet pipe, the upper end of the external circulation air inlet pipe is connected to the external circulation air regulating valve assembly, and the other corresponding end of the external circulation exhaust duct is connected to the external circulation air regulating valve assembly, the test component includes a valve regulating motor, the valve regulating motor drives the connection to the external circulation air regulating valve assembly, and the control circuit controls the connection to the valve regulating motor.

[0007] Preferably, the external circulation air regulating valve assembly includes a fixed inner valve cover and a movable outer valve cover, the fixed inner valve cover includes a fixed top plate and a fixed side ring, the outer end of the fixed top plate is integrally connected to the upper end of the fixed side ring, a fixed air inlet is formed on the fixed top plate, and a fixed air outlet is formed on the fixed side ring, the movable outer valve cover includes a movable top plate and a movable side ring, the outer end of the movable top plate is integrally connected to the upper end of the movable side ring, a movable air inlet is formed on the movable top plate, and a movable air outlet is formed on the movable side ring, the movable outer valve cover adapter cover is arranged outside the fixed inner valve cover, the fixed The top plate abutting cover is arranged on the upper end of the external circulation air inlet duct, the external circulation air inlet duct is connected to the fixed air inlet, and the external circulation exhaust duct is connected to the fixed air outlet, and the movable outer valve cover has a connection position and a closing position relative to the fixed inner valve cover; in the connection position, the movable air inlet is aligned with and connected to the fixed air inlet, and the movable air outlet is aligned with and connected to the fixed air outlet; in the closing position, the movable top plate closes the fixed air inlet, and the movable side ring closes the fixed air outlet; the valve regulating motor drives the movable outer valve cover to rotate relative to the fixed inner valve cover.

[0008] Preferably, the testing device of the present invention further comprises an insulating barrel, and the wind barrel is arranged in the insulating barrel.

[0009] Preferably, the testing device of the present invention further includes a workbench, which is provided with a horizontally arranged table panel, the heat-insulating barrel is arranged on the lower side of the table panel, the rear end of the barrel cover assembly is hinged to the table panel, and the control panel is uprightly arranged on the table panel.

[0010] Compared with the prior art, the utility model has the following beneficial effects: by setting a test component, a control panel and a wind wheel motor, the test component includes a wind barrel, a barrel cover component, an air duct basin, a centrifugal wind wheel and a socket frame, the socket frame is provided with a conductive clip for electrically connecting the thermal protector, and the conductive clips are evenly distributed circumferentially, the barrel cover component is covered on the wind barrel, the centrifugal wind wheel is provided on the lower side of the air duct basin, a heating pipe is provided on the outer side of the centrifugal wind wheel, the wind wheel motor drives the centrifugal wind wheel, the conductive clip is provided on the corresponding upper side of the air supply duct, a vent is formed at the bottom of the air duct basin, the suction end position of the centrifugal wind wheel corresponds to the vent, a temperature sensor is provided on the lower side of the socket frame, an on-off indicator light is provided on the control panel, the conductive clips are electrically connected to the corresponding on-off indicator lights, and the control circuit is electrically connected to the temperature sensor and the heating pipe, so that the thermal protector temperature testing device of the utility model can test multiple thermal protectors at the same time, and is beneficial to improving the test accuracy of the thermal protector, thereby being beneficial to improving work efficiency and improving the effectiveness of quality inspection. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a top view of the three-dimensional structure of the thermal protector temperature testing device of the present invention.

[0012] Figure 2 It is a schematic cross-sectional structure diagram of the thermal protector temperature testing device of the present invention as viewed from the right.

[0013] Figure 3 It is a schematic diagram of the three-dimensional cross-sectional structure of the test assembly of the present utility model.

[0014] Figure 4 This is a schematic diagram of the three-dimensional structure of the test assembly of the present invention with the wind barrel and the barrel cover assembly removed.

[0015] Figure 5 for Figure 4 Schematic diagram of the local structure at point A.

[0016] Figure 6 It is a three-dimensional structural diagram of the combination of the external circulation air regulating valve assembly and the external circulation air inlet pipe of the present invention.

[0017] Figure 7 To correspond Figure 6 Schematic diagram of the three-dimensional cross-section of the local structure.

[0018] Figure 8 This is an exploded schematic diagram of the external circulation air regulating valve assembly of the present utility model.

[0019] Figure 9 This is a simplified circuit diagram for testing the thermal protector.

[0020] Explanation of reference numerals: workbench 1; table panel 11; test assembly 2; wind barrel 21; air supply duct 211; barrel cover assembly 22; air duct basin 23; vent 231; centrifugal wind wheel 24; heating pipe 241; socket rack 25; conductive clip 2501; external circulation exhaust duct 26; external circulation air inlet duct 27; external circulation air regulating valve assembly 28; fixed inner valve cover 281; fixed top plate 2811; fixed side ring 2812; fixed air inlet 2813; fixed air outlet 2814; movable outer valve cover 282; movable top plate 2821; movable side ring 2822; movable air inlet 2823; movable air outlet 2824; protective cover 283; valve regulating motor 29; control panel 3; on / off indicator light 301; wind wheel motor 4; heat-insulating barrel 5; temperature sensor 6; thermal protector 99. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] The thermal protector temperature testing device of the utility model is as follows Figures 1 to 4 As shown, it includes a test assembly 2, a control panel 3 and a wind wheel motor 4. The test assembly 2 includes a wind barrel 21, a barrel cover assembly 22, an air duct basin 23, a centrifugal wind wheel 24 and a socket frame 25. The socket frame 25 is set to be ring-shaped, as shown in FIG. Figure 5 As shown, the socket frame 25 is provided with a conductive clip 2501 for electrically connecting the thermal protector 99, as shown in FIG. Figure 4 As shown, the conductive clips 2501 are evenly distributed around the circumference. Specifically, each group of two conductive clips 2501 is used to elastically clamp the two pins of the thermal protector 99. For an example of the structure of the conductive clips 2501 for clamping the pins of the thermal protector 99, please refer to the "Socket Socket Assembly and Socket" of the Chinese Utility Model Patent Publication No. CN205194911U. A circuit board is provided on the lower side of the socket frame 25, and the lower end of each conductive clip 2501 is welded to the circuit board. Figure 3 As shown, the air duct basin 23, centrifugal wind wheel 24 and socket frame 25 are arranged in the air barrel 21, and the barrel cover assembly 22 is arranged on the air barrel 21. The centrifugal wind wheel 24 is arranged on the lower side of the air duct basin 23. The outer side of the centrifugal wind wheel 24 is provided with a heating pipe 241. The wind wheel motor 4 drives and connects to the centrifugal wind wheel 24. The rotation axis of the centrifugal wind wheel 24 is perpendicular to the horizontal plane. The wind wheel motor 4 is arranged below the air barrel 21. The output shaft of the wind wheel motor 4 is coaxially connected to the centrifugal wind wheel 24, so that the wind wheel motor 4 can drive the centrifugal wind wheel 24 to rotate. Figure 2 and Figure 3As shown, the socket frame 25 is provided on the upper side of the air duct basin 23, and an air supply duct 211 is formed between the outer wall of the air duct basin 23 and the inner wall of the air barrel 21, so the air supply duct 211 is provided all around, and the air barrel 21 and the air duct basin 23 can be provided in a circular shape. In other words, the inner wall of the air barrel 21 and the outer wall of the air duct basin 23 are both cylindrical surfaces, and the conductive clip 2501 is provided on the corresponding upper side of the air supply duct 211, as shown in FIG. Figure 3 As shown, a vent 231 is formed at the bottom of the air duct basin 23, and the air suction end of the centrifugal wind wheel 24 corresponds to the vent 231. Figure 2 As shown, a temperature sensor 6 is provided on the lower side of the socket frame 25. Figure 1 As shown, the control panel 3 is provided with an on-off indicator light 301, which can be arranged in a rectangular array. The conductive clips 2501 are electrically connected to the corresponding on-off indicator lights 301. When the thermal protector 99 is connected to the conductive clips 2501, the test circuit of the thermal protector 99 can refer to Figure 9 The thermal protector temperature testing device of the present invention further includes a control circuit, which is electrically connected to the temperature sensor 6 and the heating tube 241.

[0023] The following briefly describes the working principle of the practical thermal protector temperature test device: open the barrel cover assembly 22, and then insert each thermal protector 99 to be tested into the conductive clip 2501, the heating tube 241 is energized, and the wind wheel motor 4 drives the centrifugal wind wheel 24 to operate. Figure 3As shown by the double-dotted arrow in the figure, the centrifugal wind wheel 24 throws the air out to form an air flow, and the heating tube 241 heats the above air flow. Thereafter, the air flow is blocked by the inner wall of the wind barrel 21 and turns upward to pass through the air supply duct 211. The hot air flow flows through the thermal protector 99 on the socket rack 25, causing the thermal protector 99 to heat up. The hot air flow then reaches the upper part of the wind barrel 21. Since the socket rack 25 is annular and the suction end position of the centrifugal wind wheel 24 corresponds to the vent 231, the middle part of the centrifugal wind wheel 24 sucks the air in the air duct basin 23, so that the hot air on the upper part of the wind barrel 21 is sucked down to the vent The outlet 231 forms an internal circulating airflow, which is circulated and heated by the heating tube 241, so that the air temperature in the wind barrel 21 can rise rapidly, which is beneficial to the rapid heating of the thermal protector 99. The control circuit monitors the air temperature at the socket rack 25 through the temperature sensor 6. When the temperature value monitored by the temperature sensor 6 exceeds the set value, the control circuit reduces the input power of the heating tube 241 accordingly. When the temperature value monitored by the temperature sensor 6 drops below the set value, the control circuit increases the input power of the heating tube 241 accordingly. In other words, the control circuit can control the temperature in the wind barrel 21 more accurately. The control circuit first raises the air temperature in the wind barrel 21 to the operating temperature of the thermal protector 99 and maintains it for a certain period of time. The thermal protector 99 will automatically operate to disconnect the circuit, and the on-off indicator light 301 corresponding to the thermal protector 99 will go out. Corresponding digital marks can be made on the socket rack 25 and the control panel 3. Each digital mark corresponds to the conductive clip 2501 and the on-off indicator light 301, so that the technician can quickly know which thermal protectors 99 can be disconnected normally; then the control circuit lowers the air temperature in the wind barrel 21 to the reset temperature of the thermal protector 99 and maintains it for a certain period of time. The thermal protector 99 will automatically reset and connect the circuit, so that the corresponding on-off indicator light 301 lights up, and the unqualified thermal protectors 99 can be screened out. As can be seen from the above, the thermal protector temperature testing device of the present invention can test multiple thermal protectors 99 simultaneously, which is conducive to improving the efficiency of quality inspection, that is, it is conducive to improving work efficiency and the effectiveness of quality inspection. The present invention controls the ambient temperature of the thermal protector 99 by circulating hot air, which is conducive to making the heating conditions of each thermal protector 99 the same, which is conducive to improving the accuracy of the test. Since the air supply duct 211 is arranged around the entire circumference and the conductive clips 2501 are evenly distributed around the circumference, it is further conducive to making the heating conditions of each thermal protector 99 the same. By providing an on-off indicator light 301, it is conducive to quickly and intuitively displaying the test status of the thermal protector 99.

[0024] Furthermore, if Figure 3As shown, the test component 2 includes an external circulation exhaust duct 26 and an external circulation air inlet pipe 27, and the external circulation exhaust duct 26 and the external circulation air inlet pipe 27 are arranged on the barrel cover assembly 22. In other words, when the barrel cover assembly 22 is opened and moved, the external circulation exhaust duct 26 and the external circulation air inlet pipe 27 can move with the barrel cover assembly 22. One end of the external circulation exhaust duct 26 is connected to the upper part of the ventilation barrel 21, and the external circulation air inlet pipe 27 is arranged upright. The lower end of the external circulation air inlet pipe 27 is located on the corresponding upper side of the vent 231. The test component 2 includes an external circulation air regulating valve assembly 28 for adjusting the flow of the external circulation exhaust duct 26 and the flow of the external circulation air inlet pipe 27. The upper end of the external circulation air inlet pipe 27 is connected to the external circulation air regulating valve assembly 28, and the other corresponding end of the external circulation exhaust duct 26 is connected to the external circulation air regulating valve group Component 28, that is, the external circulation air regulating valve assembly 28 can regulate the flow rate of air flowing between the wind barrel 21 and the external environment, the test component 2 includes a valve regulating motor 29, the valve regulating motor 29 drives the connection to the external circulation air regulating valve assembly 28, and the control circuit controls the connection to the valve regulating motor 29, that is, the external circulation air regulating valve assembly 28 can be adjusted electrically. Through the above settings, when it is necessary to lower the temperature in the wind barrel 21 to the reset temperature of the thermal protector 99, the control circuit controls the valve regulating motor 29 to drive the external circulation air regulating valve assembly 28 to increase the flow rate of air flowing between the wind barrel 21 and the external environment, so that more cold air from the outside enters the wind barrel 21, so that the temperature in the wind barrel 21 can be quickly reduced, which is beneficial to improving the quality inspection efficiency of the thermal protector 99. Specifically, Figure 3 As shown by the dotted arrow in the figure, since the lower end of the external circulation air inlet pipe 27 is located on the corresponding upper side of the vent 231, the negative pressure generated by the suction end of the centrifugal impeller 24 will attract the air flow in the external circulation air inlet pipe 27, so that the external air flow enters the external circulation air inlet pipe 27 from top to bottom through the external circulation air regulating valve assembly 28. Due to the principle that hot air rises and the higher air pressure in the wind barrel 21, and one end of the external circulation exhaust duct 26 is connected to the upper part of the wind barrel 21, a part of the air in the upper part of the wind barrel 21 flows along the external circulation exhaust duct 26 and is discharged to the outside through the external circulation air regulating valve assembly 28, thereby realizing external circulation. When the temperature in the wind barrel 21 drops to the set value, the control circuit controls the valve regulating motor 29 to drive the external circulation air regulating valve assembly 28 to reduce the external circulation flow or close the external circulation.

[0025] Furthermore, if Figure 3 、 Figures 6 to 8As shown, the external circulation air regulating valve assembly 28 includes a fixed inner valve cover 281 and a movable outer valve cover 282. The fixed inner valve cover 281 includes a fixed top plate 2811 and a fixed side ring 2812. The outer end of the fixed top plate 2811 is integrally connected to the upper end of the fixed side ring 2812. A fixed air inlet 2813 is formed on the fixed top plate 2811, and a fixed air outlet 2814 is formed on the fixed side ring 2812. The movable outer valve cover 282 includes a movable top plate 2821 and a movable side ring 2822. The outer end of the movable top plate 2821 is integrally connected to the upper end of the movable side ring 2822. 1 is formed with a movable air inlet 2823, and a movable air outlet 2824 is formed on the movable side ring 2822. The movable outer valve cover 282 is adapted to be disposed outside the fixed inner valve cover 281. The fixed top plate 2811 is disposed against the upper end of the external circulation air inlet pipe 27. The fixed top plate 2811 can be sealed and welded to the upper end of the external circulation air inlet pipe 27. The external circulation air inlet pipe 27 is connected to the fixed air inlet 2813, and the external circulation air exhaust duct 26 is connected to the fixed air outlet 2814. A flange is formed on the outer periphery of the fixed inner valve cover 281, and the above-mentioned flange is mounted on the top surface of the barrel cover assembly 22 by corresponding screws. The movable outer valve cover 282 has an on position and a closed position relative to the fixed inner valve cover 281; Figure 6 and Figure 7 As shown, in the connected position, the movable air inlet 2823 is aligned with and connected to the fixed air inlet 2813, and the movable air outlet 2824 is aligned with and connected to the fixed air outlet 2814; in the closed position, the movable top plate 2821 closes the fixed air inlet 2813, and the movable side ring 2822 closes the fixed air outlet 2814; the valve regulating motor 29 drives the movable outer valve cover 282 to rotate relative to the fixed inner valve cover 281. Specifically, the external circulation air regulating valve assembly 28 is further provided with a protective cover 283, the top of the protective cover 283 is provided with a top ventilation hole, and the outer periphery of the protective cover 283 is also formed with a notch, and the movable outer valve cover 282 is installed in the protective cover 283 by corresponding screws. The position of the movable air outlet 2824 corresponds to the above-mentioned notch, and the movable air inlet 2823 is aligned with and connected to the above-mentioned top ventilation hole, as shown in FIG. Figure 3As shown, the protective cover 283 and the output shaft of the valve regulating motor 29 can be relatively fixedly connected by a screw coaxially arranged with the output shaft of the valve regulating motor 29, so that the output shaft of the valve regulating motor 29, the protective cover 283, the movable outer valve cover 282 and the fixed inner valve cover 281 are coaxially arranged. The valve regulating motor 29 can be a stepping motor. When the output shaft of the valve regulating motor 29 rotates, it can drive the movable outer valve cover 282 to rotate relative to the fixed inner valve cover 281 between the above-mentioned connection position and the above-mentioned closed position. For example, when the degree of overlap between the movable air inlet 2823 and the fixed air inlet 2813 is low, that is, the external circulation air inlet cross-sectional area is small, the external circulation air inlet flow rate is small. By setting the above-mentioned external circulation air regulating valve assembly 28 structure, only one valve regulating motor 29 is required to achieve synchronous adjustment of external circulation air intake and external circulation exhaust. As shown Figure 3 As shown, the external circulation exhaust duct 26 includes a pipe extending radially about the wind barrel 21, the above-mentioned pipe is formed at the bottom of the barrel cover assembly 22, and the upper part of the external circulation air inlet pipe 27 is also coaxially sleeved with an external circulation exhaust pipe, the radial inner end of the above-mentioned pipe is connected to the above-mentioned external circulation exhaust pipe, the above-mentioned pipe is evenly distributed circumferentially, the lower end of the above-mentioned external circulation exhaust pipe is closed, and the upper end of the above-mentioned external circulation exhaust pipe is connected to the fixed air outlet 2814.

[0026] Furthermore, if Figure 2 As shown, the test device of the present invention also includes an insulated barrel 5, within which a wind barrel 21 is disposed. The opening of the insulated barrel 5 faces upward, and a wind rotor motor 4 is disposed below the insulated barrel 5. The output shaft of the wind rotor motor 4 passes through the bottom of the insulated barrel 5 and the bottom of the wind barrel 21. The insulated barrel 5 insulates the wind barrel 21 from the outside world, reducing heat exchange between the outside world and the wind barrel 21, thereby improving the controllability of the temperature within the wind barrel 21.

[0027] Furthermore, if Figure 1 As shown, the testing device of the present invention further comprises a workbench 1, which is provided with a horizontally arranged table panel 11. Figure 2 As shown, the heat-insulating barrel 5 is arranged on the lower side of the table panel 11, and the rear end of the barrel cover assembly 22 is hinged to the table panel 11. When the barrel cover assembly 22 is in a closed state, the upper part of the barrel cover assembly 22 is located above the table panel 11. The table panel 11 is formed with a hole. The lower part of the barrel cover assembly 22 is sunk into the hole. The upper end of the wind barrel 21 is connected to the edge of the hole. Then, the barrel cover assembly 22 is swung upward to open it, and the thermal protector 99 can be taken out from the socket bracket 25. Figure 1As shown, the control panel 3 is vertically arranged on the table panel 11. Specifically, a panel bracket is welded on the table panel 11, and the control panel 3 is arranged on the above-mentioned panel bracket. Since the control panel 3 is vertically arranged, it is convenient for the technician to observe the on-off indicator light 301 from the front; by setting the table panel 11, it is convenient for the technician to place test-related items on the table panel 11.

Claims

1. A thermal protector temperature test device, characterized in that: The invention comprises a test assembly (2), a control panel (3) and a wind wheel motor (4), wherein the test assembly (2) comprises a wind barrel (21), a barrel cover assembly (22), an air duct basin (23), a centrifugal wind wheel (24) and a socket frame (25), wherein the socket frame (25) is arranged in a ring shape, and a conductive clip (2501) for electrically connecting to a thermal protector (99) is provided on the socket frame (25), and the conductive clip (2501) is evenly distributed in the circumferential direction, the air duct basin (23), the centrifugal wind wheel (24) and the socket frame (25) are arranged in the wind barrel (21), the barrel cover assembly (22) is covered on the wind barrel (21), the centrifugal wind wheel (24) is arranged on the lower side of the air duct basin (23), and a heating pipe (241) is provided on the outer side of the centrifugal wind wheel (24), and the wind wheel motor (4) drives The centrifugal wind wheel (24) is connected, the socket frame (25) is arranged on the upper side of the air duct basin (23), an air supply duct (211) is formed between the outer wall of the air duct basin (23) and the inner wall of the wind barrel (21), the conductive clip (2501) is arranged on the corresponding upper side of the air supply duct (211), a vent (231) is formed at the bottom of the air duct basin (23), the air suction end of the centrifugal wind wheel (24) corresponds to the vent (231), a temperature sensor (6) is provided on the lower side of the socket frame (25), an on / off indicator light (301) is provided on the control panel (3), and the conductive clip (2501) is electrically connected to the corresponding on / off indicator light (301); and a control circuit is also included, the control circuit being electrically connected to the temperature sensor (6) and the heating tube (241).

2. The thermal protector temperature testing device according to claim 1, characterized in that: The test assembly (2) includes an external circulation exhaust duct (26) and an external circulation air inlet pipe (27), the external circulation exhaust duct (26) and the external circulation air inlet pipe (27) are arranged on the barrel cover assembly (22), one end of the external circulation exhaust duct (26) is connected to the upper part of the wind barrel (21), the external circulation air inlet pipe (27) is vertically arranged, and the lower end of the external circulation air inlet pipe (27) is located on the corresponding upper side of the vent (231), the test assembly (2) includes a valve for adjusting the external circulation exhaust duct (26) ) and the flow rate of the external circulation air inlet pipe (27), the upper end of the external circulation air inlet pipe (27) is connected to the external circulation air regulating valve assembly (28), and the other end corresponding to the external circulation exhaust duct (26) is connected to the external circulation air regulating valve assembly (28), the test component (2) includes a valve regulating motor (29), the valve regulating motor (29) drives the external circulation air regulating valve assembly (28), and the control circuit controls the valve regulating motor (29).

3. The thermal protector temperature testing device according to claim 2, characterized in that: The external circulation air regulating valve assembly (28) includes a fixed inner valve cover (281) and a movable outer valve cover (282), the fixed inner valve cover (281) includes a fixed top plate (2811) and a fixed side ring (2812), the outer end of the fixed top plate (2811) is integrally connected to the upper end of the fixed side ring (2812), the fixed top plate (2811) is formed with a fixed air inlet (2813), and the fixed side ring (2812) is formed with a fixed air outlet. The movable outer valve cover (282) includes a movable top plate (2821) and a movable side ring (2822). The outer end of the movable top plate (2821) is integrally connected to the upper end of the movable side ring (2822). The movable top plate (2821) is formed with a movable air inlet (2823), and the movable side ring (2822) is formed with a movable air outlet (2824). The movable outer valve cover (282) is adapted to be provided on the fixed inner valve. The fixed top plate (2811) is arranged on the upper end of the external circulation air inlet pipe (27) against the cover (281), the external circulation air inlet pipe (27) is connected to the fixed air inlet (2813), the external circulation air exhaust duct (26) is connected to the fixed air outlet (2814), and the movable outer valve cover (282) has an on position and a closed position relative to the fixed inner valve cover (281); in the on position, the movable air inlet (2823) is aligned with the fixed inner valve cover (281). The movable air outlet (2824) is connected to the fixed air inlet (2813), and the movable air outlet (2824) is aligned with and connected to the fixed air outlet (2814); in the closed position, the movable top plate (2821) closes the fixed air inlet (2813), and the movable side ring (2822) closes the fixed air outlet (2814); the valve regulating motor (29) drives the movable outer valve cover (282) to rotate relative to the fixed inner valve cover (281).

4. The thermal protector temperature testing device according to claim 1, characterized in that: It also includes a heat-insulating barrel (5), wherein the wind barrel (21) is arranged in the heat-insulating barrel (5).

5. The thermal protector temperature testing device according to claim 4, characterized in that: The invention also includes a workbench (1), wherein the workbench (1) is provided with a horizontally arranged table panel (11), the heat-insulating barrel (5) is arranged on the lower side of the table panel (11), the rear end of the barrel cover assembly (22) is hinged to the table panel (11), and the control panel (3) is vertically arranged on the table panel (11).

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