Thermal protector service life testing machine

Abstract

The utility model discloses a thermal protector life test machine, comprising a test assembly, the test assembly comprises a thermal protector elevating assembly and a heating module, the thermal protector elevating assembly comprises an elevating seat, a motor and a clamping seat used for clamping a thermal protector, the motor drives the elevating seat to move up and down, the clamping seat is arranged on the elevating seat, and the heating module is arranged on the elevating seat. The heating module comprises a heat transfer block and an electric heating plate used for heating the heat transfer block, the heat transfer block is arranged below the clamping seat, the heat transfer block is attached to the upper side of the electric heating plate, and a first inserting groove used for allowing the corresponding heat protector to be inserted downwards in a matched mode is formed in the top of the heat transfer block; the controller is used for being electrically connected with the thermal protector, and the controller is in control connection with the motor. The service life testing machine for the thermal protector can replace human hands to test the service life of the thermal protector, so that the labor intensity can be reduced, and the service life testing efficiency of the thermal protector can be improved.

Description

Technical Field

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

[0002] At present, some home appliances are equipped with thermal protectors, which are also called temperature control switches. When the thermal protector is heated to the "action temperature" of the thermal protector, the thermal protector will automatically disconnect, causing the circuit connected to the thermal protector to be disconnected. When the temperature of the thermal protector drops to the "reset temperature", the thermal protector will automatically connect. There is a bimetallic element inside the thermal protector, which realizes the switching action by deformation and reset of the bimetallic element. Therefore, the bimetallic element may be damaged due to fatigue after repeated actions. Therefore, a batch of thermal protectors need to undergo life testing (which can be random inspection) before leaving the factory, and home appliance manufacturers who purchase thermal protectors need to undergo life testing (which can be random inspection). Thermal protectors are also subject to random inspections. Currently, the thermal protector is placed on a heating plate and heated manually. After the thermal protector is disconnected, the thermal protector is manually removed from the heating plate. Due to the limited working hours of workers, it is usually judged as a good product after a few tests. However, in actual applications, since household appliances equipped with thermal protectors are not scrapped until they have been used for a long time, the gap between the number of tests of the thermal protector and the total number of actions in actual use is too large. The test results of the thermal protector cannot play an effective role in judging product quality. Therefore, it is necessary to set up a device that can perform life tests on thermal protectors instead of manual operation. 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 life tester, which is conducive to reducing labor intensity and improving the efficiency of the thermal protector life test.

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

[0005] The thermal protector life tester disclosed in the present invention includes a test component, which includes a thermal protector lifting component and a heating module. The thermal protector lifting component includes a lifting seat, a motor and a clamping seat for clamping the thermal protector. The motor drives the lifting seat to move up and down. The clamping seat is arranged on the lifting seat. The heating module includes a heat transfer block and an electric heating plate for heating the heat transfer block. The heat transfer block is arranged below the clamping seat. The heat transfer block is abutted against the upper side of the electric heating plate. A first slot is formed on the top of the heat transfer block for the corresponding thermal protector to be adapted and inserted downward; and a controller for electrically connecting the thermal protector is also included. The controller controls the connection to the motor.

[0006] Preferably, the rear part of the clamping seat slides up and down to connect to the lifting seat, the lifting seat is rotatably connected to a hanging screw, the lower end of the hanging screw is screwed to the clamping seat, the hanging screw is sleeved with a buffer spring, the upper end of the buffer spring contacts and connects to the lifting seat, and the lower end of the buffer spring contacts and connects to the clamping seat.

[0007] Preferably, the heating module includes a heat-insulating shell, the electric heating plate and the heat transfer block are arranged in the heat-insulating shell, a avoidance hole is formed on the top of the heat-insulating shell, and the upper end of the heat transfer block protrudes upward from the avoidance hole.

[0008] Preferably, a second slot is formed on the top of the heat transfer block, and a rubber sleeve is provided in the second slot for the corresponding thermal protector to be inserted downwardly. The front part of the heat insulation shell is screwed with a clamping pin for clamping the rubber sleeve, and the rear end of the clamping pin contacts and connects the outer wall of the rubber sleeve.

[0009] Preferably, the thermal protector life testing machine of the present invention also includes a workbench and a control panel, the test component is arranged on the workbench, a panel bracket is provided on the workbench, the control panel is arranged on the panel bracket, the control panel is arranged upright, and the control panel is located at the upper rear of the test component.

[0010] Preferably, a cabinet cavity is provided below the workbench, and a cabinet door is provided corresponding to the cabinet cavity.

[0011] Compared with the prior art, the present invention has the following beneficial effects: by setting a test component including a thermal protector lifting component and a heating module, the thermal protector lifting component includes a lifting seat, a motor and a clamping seat for clamping the thermal protector, the motor drives the lifting seat to move up and down, the clamping seat is set on the lifting seat, the heating module includes a heat transfer block and an electric heating plate for heating the heat transfer block, a first slot for the corresponding thermal protector to be adapted and inserted downward is formed on the top of the heat transfer block, a controller for electrically connecting the thermal protector is set, and the controller controls the connection motor, so that the thermal protector life test machine of the present invention can replace manual testing of the thermal protector, thereby reducing labor intensity and improving the efficiency of the life test of the thermal protector. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the three-dimensional structure of the thermal protector life tester of the utility model, viewed from the front.

[0013] Figure 2 It is a schematic diagram of the three-dimensional structure of the test component of the present utility model.

[0014] Figure 3 It is a schematic cross-sectional structural diagram of the test assembly of the present utility model.

[0015] Figure 4 This is an exploded schematic diagram of the heating module of the present invention.

[0016] Figure 5 It is a three-dimensional structural diagram of the thermal protector life tester of the present invention with the cabinet door removed.

[0017] Explanation of reference numerals: test assembly 10; thermal protector lifting assembly 1; clamping seat 11; pressure plate 111; buffer spring 112; hanging screw 113; lifting seat 12; trigger plate 121; motor 13; bracket 14; ball screw pair 15; travel limit photoelectric switch 16; heating module 2; heat transfer block 21; first slot 2102; second slot 2102; rubber sleeve 211; thermal insulation shell 22; avoidance hole 2201; clamping pin 23; electric heating plate 24; control panel 3; panel bracket 31; workbench 4; cabinet cavity 400; cabinet door 401; thermal protector 99. DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with the accompanying drawings.

[0019] The thermal protector life tester of the utility model is as follows Figure 1 As shown, the test assembly 10 is included, such as Figure 2 and Figure 3 As shown, the test assembly 10 includes a thermal protector lifting assembly 1 and a heating module 2. The thermal protector lifting assembly 1 includes a lifting seat 12, a motor 13 and a clamping seat 11 for clamping the thermal protector 99. The motor 13 drives the lifting seat 12 to move up and down. Specifically, the thermal protector lifting assembly 1 also includes a bracket 14. The lifting seat 12 is slidably connected to the bracket 14 through a corresponding linear guide pair. The motor 13 drives the lifting seat 12 to move up and down through a ball screw pair 15. The clamping seat 11 is set on the lifting seat 12, as shown in FIG. Figure 3 and Figure 4 As shown, the heating module 2 includes a heat transfer block 21 and an electric heating plate 24 for heating the heat transfer block 21. The heat transfer block 21 can be made of copper. The heat transfer block 21 is arranged below the clamp 11. The heat transfer block 21 is attached to the upper side of the electric heating plate 24. The top of the heat transfer block 21 is formed with a first slot 2101 for the corresponding thermal protector 99 to be inserted downwardly. The thermal protector life tester of the present invention also includes a controller for electrically connecting the thermal protector 99, and the controller controls the connection motor 13.

[0020] The following briefly describes the working principle of the thermal protector life tester of the utility model: Figure 3As shown, a pressure plate 111 is installed at the front end of the clamping seat 11 through corresponding screws, and the thermal protector 99 is clamped at the front end of the clamping seat 11 by the pressure plate 111. The lead wire of the thermal protector 99 is upward, and the lead wire of the thermal protector 99 is electrically connected to the load and the controller, thereby simulating the actual application of the thermal protector 99. The electric heating plate 24 is powered on and works, and the electric heating plate 24 heats the heat transfer block 21. The motor 13 drives the lifting seat 12, the clamping seat 11 and the thermal protector 99 to move downward, so that the thermal protector 99 is inserted into the corresponding first slot 2101. As a result, the four sides of the thermal protector 99 are close to the inner wall of the first slot 2101, so that the heat of the heat transfer block 21 can be transferred to the thermal protector at a faster speed. When the temperature of thermal protector 99 rises to its operating temperature, thermal protector 99 automatically disconnects. The controller, in response to the disconnection signal from thermal protector 99, controls motor 13 to lift thermal protector 99 and remove it from heat transfer block 21. The controller then waits for thermal protector 99 to cool to its reset temperature, whereupon thermal protector 99 automatically reconnects. In response to the connection signal from thermal protector 99, the controller controls motor 13 to lower thermal protector 99 and reinsert it into the corresponding first slot 2101. This cycle continues, with the controller recording the number of disconnections (i.e., the number of tests) of thermal protector 99. The controller may be electrically connected to a display for displaying the number of tests. As can be seen from the foregoing, the thermal protector life tester of the present invention can replace manual testing of thermal protector 99, thereby reducing labor intensity. Furthermore, since the thermal protector life tester can operate automatically and continuously, workers' rest time is saved. Furthermore, each time the thermal protector 99 actuates, the controller can quickly respond by raising and lowering clamp 11, thereby improving the efficiency of thermal protector life testing. By arranging the electric heating plate 24 to heat the heat transfer block 21, the heat transfer block 21 then transfers the heat to the thermal protector 99, so that when the external dimensions of the thermal protector 99 change, the heat transfer block 21 can be replaced accordingly, which is conducive to expanding the scope of application of the thermal protector life tester of the utility model. Figure 3 As shown, two travel limit photoelectric switches 16 can be installed on the support 14, and the travel limit photoelectric switches 16 are electrically connected to the above-mentioned controller. A trigger plate 121 is installed on the lifting seat 12. When the trigger plate 121 triggers the travel limit photoelectric switch 16 located in the upper position, the controller knows that the thermal protector 99 has risen to the limit position, and the controller controls the motor 13 to stop accordingly. Similarly, when the trigger plate 121 moves downward to trigger the travel limit photoelectric switch 16 located in the lower position, the controller controls the motor 13 to stop accordingly.

[0021] Further, if Figure 2 and Figure 3As shown, the rear part of the clamping seat 11 is connected to the lifting seat 12 by sliding up and down through the corresponding linear guide pair. The lifting seat 12 is rotatably connected to the hanging screw 113. The lower end of the hanging screw is screwed to the clamping seat 11. The hanging screw 113 is provided with a buffer spring 112. The upper end of the buffer spring 112 contacts the lifting seat 12, and the lower end of the buffer spring 112 contacts the clamping seat 11. In other words, a through hole is formed on the upper part of the lifting seat 12. The screw portion of the hanging screw 113 is adapted to pass through the above-mentioned through hole, but the head of the hanging screw 113 is hung on the upper side of the edge of the above-mentioned through hole. Through the above-mentioned arrangement, the elastic restoring force of the buffer spring 112 pushes the clamping seat 11 downward, and the head of the hanging screw 113 supports the above-mentioned elastic restoring force. , so that the clamping seat 11 and the lifting seat 12 can remain relatively stationary, but in the process of the motor 13 lowering the lifting seat 12, the lower end of the thermal protector 99 and the upper end of the corresponding first slot 2102 will have a frictional impact on each other. At this time, the buffer spring 112 can be elastically compressed and deformed to absorb the impact force. That is to say, at this time, the clamping seat 11 can move upward slightly relative to the lifting seat 12. Then, after the lower end of the thermal protector 99 is inserted into the first slot 2102, the elastic restoring force of the buffer spring 112 will drive the clamping seat 11 to move downward and reset relative to the lifting seat 12, so that the lower end of the head of the hanging screw 113 is restored to be close to the edge of the above-mentioned through hole, thereby avoiding damage to the thermal protector 99 or the first slot 2102.

[0022] Further, if Figure 3 and Figure 4 As shown, the heating module 2 includes an insulating housing 22, within which the electric heating plate 24 and the heat transfer block 21 are disposed. A clearance hole 2201 is formed at the top of the insulating housing 22. The upper end of the heat transfer block 21 protrudes upward from the clearance hole 2201, allowing the thermal protector 99 to be inserted into the heat transfer block 21. Thus, the insulating housing 22 reduces heat loss from the electric heating plate 24 and the heat transfer block 21 and prevents human contact with the electric heating plate 24 during operation. For example, the insulating housing 22 may be a sheet metal component, with an air barrier provided between the insulating housing 22, the electric heating plate 24, and the heat transfer block 21. Alternatively, the insulating housing 22 may be made of mica board.

[0023] Further, if Figure 4 As shown, a second slot 2102 is formed on the top of the heat transfer block 21. Figures 2 to 4As shown, a rubber sleeve 211 is provided in the second slot 2102 for the corresponding thermal protector 99 to be inserted downwardly into, and a clamping pin 23 for clamping the rubber sleeve 211 is screwed to the front of the heat-insulating shell 22. The rear end of the clamping pin 23 contacts the outer wall of the connecting rubber sleeve 211. In other words, the clamping pin 23 penetrates into the heat transfer block 21. Some thermal protectors 99 have plastic or ceramic shells. These types of thermal protectors 99 have shells that contact the heat transfer block 21 without causing leakage. However, some thermal protectors 99 have shells made of metal such as stainless steel or copper. Since the thermal protector 99 needs to be connected to a load during a life test, it is necessary to avoid direct contact between the thermal protector 99 and the heat transfer block 21. Therefore, the rubber sleeve 211 is set in the second slot 2102. When the lifting seat 12 drives the metal shell type thermal protector 99 to move downward, it is inserted into the corresponding rubber sleeve 21. 1, the heat transfer block 21 transfers heat to the rubber sleeve 211, and the rubber sleeve 211 then transfers the heat to the metal shell type thermal protector 99. The rubber sleeve 211 insulates the shell of the metal shell type thermal protector 99. Since the rear end of the clamping nail 23 contacts the outer wall of the rubber sleeve 211, tightening the clamping nail 23 will clamp the rubber sleeve 211 between the rear end of the clamping nail 23 and the rear inner wall of the second slot 2102, preventing the rubber sleeve 211 from being removed from the heat transfer block 21 when the metal shell type thermal protector 99 moves upward. Figure 4 As shown, specifically, the heat transfer block 21 has two first slots 2102 and two second slots 2102 distributed in the left and right directions, as shown in FIG. Figure 2 As shown, the clamping seat 11 is provided with four pressing plates 111 on the left and right sides, and each pressing plate 111 holds a corresponding type of thermal protector 99, so that the lifting seat 12 can simultaneously raise or lower each thermal protector 99. The rubber sleeve 211 can be made of silicone rubber.

[0024] Furthermore, if Figure 1 As shown, the thermal protector life tester of the present invention also includes a workbench 4 and a control panel 3. The test component 10 is arranged on the workbench 4. Specifically, the lower end of the support 14 is mounted on the workbench 4 by corresponding screws. The heating module 2 includes a base plate. The electric heating plate 24 is mounted above the base plate, and the base plate is mounted on the workbench 4 by corresponding screws. A panel bracket 31 is provided on the workbench 4, and a control panel 3 is provided on the panel bracket 31. The control panel 3 is arranged upright. The control panel 3 is located at the upper rear of the test component 10, which is convenient for workers to place test-related materials or the thermal protector 99 to be tested on the workbench 4. Since the control panel 3 is arranged upright, it is convenient for workers to view and operate the control panel 3. The display mentioned above can be set on the control panel 3. Figure 1 As shown, four sets of test assemblies 10 can be set on the workbench 4, which increases the number of thermal protectors 99 that can be tested for life at the same time, and is beneficial to improving the effectiveness of the life test.

[0025] Further, if Figure 5 As shown, a cabinet cavity 400 is provided below the workbench 4. Figure 1 As shown, the cabinet cavity 400 is provided with a cabinet door 401 , and the cabinet cavity 400 can accommodate components related to the life test of the thermal protector 99 .

Claims

1. A thermal protector life tester, characterized by: The invention comprises a test assembly (10), wherein the test assembly (10) comprises a thermal protector lifting assembly (1) and a heating module (2), wherein the thermal protector lifting assembly (1) comprises a lifting seat (12), a motor (13) and a clamping seat (11) for clamping the thermal protector (99), wherein the motor (13) drives the lifting seat (12) to move up and down, and the clamping seat (11) is arranged on the lifting seat (12), and the heating module (2) comprises a heat transfer block (21) and an electric heating plate (24) for heating the heat transfer block (21), wherein the heat transfer block (21) is arranged below the clamping seat (11), and the heat transfer block (21) is abutted against the upper side of the electric heating plate (24), and a first slot (2101) for the corresponding thermal protector (99) to be inserted downwardly is formed on the top of the heat transfer block (21); and the invention also comprises a controller for electrically connecting the thermal protector (99), wherein the controller controls the connection with the motor (13).

2. The thermal protector life tester according to claim 1, characterized in that: The rear portion of the clamping seat (11) is slidably connected to the lifting seat (12) up and down, and the lifting seat (12) is rotatably connected to a hanging screw (113), the lower end of the hanging screw is screwed to the clamping seat (11), and the hanging screw (113) is sleeved with a buffer spring (112), the upper end of the buffer spring (112) contacts and connects to the lifting seat (12), and the lower end of the buffer spring (112) contacts and connects to the clamping seat (11).

3. The thermal protector life tester according to claim 2, characterized in that: The heating module (2) comprises a heat-insulating shell (22), the electric heating plate (24) and the heat transfer block (21) are arranged in the heat-insulating shell (22), a avoidance hole (2201) is formed on the top of the heat-insulating shell (22), and the upper end of the heat transfer block (21) protrudes upward from the avoidance hole (2201).

4. The thermal protector life tester according to claim 3, characterized in that: A second slot (2102) is formed on the top of the heat transfer block (21), and a rubber sleeve (211) for the corresponding thermal protector (99) to be inserted downwardly is provided in the second slot (2102). A clamping pin (23) for clamping the rubber sleeve (211) is screwed to the front of the heat insulation shell (22), and the rear end of the clamping pin (23) contacts and connects to the outer wall of the rubber sleeve (211).

5. The thermal protector life tester according to claim 1, characterized in that: The apparatus further comprises a workbench (4) and a control panel (3), wherein the test assembly (10) is arranged on the workbench (4), a panel bracket (31) is provided on the workbench (4), and the control panel (3) is arranged on the panel bracket (31). The control panel (3) is arranged upright, and the control panel (3) is located above and behind the test assembly (10).

6. The thermal protector life tester according to claim 5, characterized in that: A cabinet cavity (400) is provided below the workbench (4), and a cabinet door (401) is correspondingly provided to the cabinet cavity (400).

Images