A detection device for thermal protectors
By introducing a hot air circulation system and a detection channel into the thermal protector detection device, the problems of low detection efficiency and high energy consumption are solved, achieving continuous detection and energy-saving effects.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FOSHAN ENGEL TECH CO LTD
- Filing Date
- 2025-05-30
- Publication Date
- 2026-06-02
AI Technical Summary
Existing thermal protector testing devices suffer from low testing efficiency, high energy consumption, and inability to operate continuously. Furthermore, the hot air cannot be recycled, resulting in high testing costs and long testing cycles.
By setting up a hot air circulation system between the detection chamber and the hot air generating chamber in the detection device, the hot air is circulated, heated, and reused using an electric fan, and a detection channel with a heating protector is set up in the detection chamber to achieve continuous detection.
It improves detection efficiency, reduces energy consumption, ensures the accuracy and continuity of detection, and saves detection costs.
Smart Images
Figure CN224317713U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of thermal protector manufacturing, and in particular to a device for testing the quality of thermal protector products. Background Technology
[0002] Thermal protectors are widely used in various electrical appliances because their moving contacts automatically spring back and separate from the circuit when the circuit temperature exceeds a set temperature, thus cutting off the circuit and protecting it from fire. Therefore, whether the moving contacts can automatically spring back after reaching the set temperature is an important indicator for testing thermal protectors.
[0003] Chinese utility model patent application number 202322780751.7, entitled "A Device for Testing Thermal Protectors," discloses a technical solution. This solution includes a mounting frame with multiple heating rods fixed to its inner side. One side of the mounting frame has an inlet, and the other side has an outlet. A heat-resistant conveyor belt is located at the bottom inner side of the mounting frame, and an air supply plate is located at the top of the mounting frame, with a fan at the top of the air supply plate. During testing, multiple thermal protectors are first fed into the mounting frame through the inlet, allowing them to reach the top of the heat-resistant conveyor belt. The fan is then activated to allow air to enter the mounting frame through the air supply plate. The temperature controller is turned on, and the heating rods heat the air to test the thermal protectors. After testing, the heat-resistant conveyor belt is activated to discharge the thermal protectors out of the mounting frame through the outlet. However, this technology has the following technical problems in use:
[0004] First, the heat-resistant conveyor belt in this testing device can only transport the thermal protector from one end of the feed port to one end of the discharge port, thus covering the entire heat-resistant conveyor belt. After the test is completed, the thermal protector is then transported out of the installation frame from the discharge port by the heat-resistant conveyor. It can be seen that this testing device can only perform intermittent testing, and the thermal protector cannot continuously enter and exit the installation frame, so continuous testing is not possible, resulting in low testing efficiency.
[0005] Secondly, during the testing of the thermal protector, hot air will overflow outside the mounting frame. The overflowing hot air cannot be recycled back into the mounting frame for reuse, resulting in heat loss. Furthermore, the newly introduced cold air requires a lot of heat and a long time to reach the temperature required for testing. Therefore, this technology not only consumes a lot of heat, which is not conducive to energy saving, but also has a long testing cycle and low testing efficiency.
[0006] Given the above-mentioned shortcomings of the existing technology, the applicant believes it is necessary to make technical improvements to provide a detection device that can operate continuously and is highly energy-efficient. Utility Model Content
[0007] The purpose of this invention is to solve the above-mentioned problems and shortcomings, and to provide a detection device for thermal protectors. By detecting the circulation of hot air between the inner cavity of the detection chamber and the inner cavity of the hot air generating chamber, the overall efficiency of heat utilization is greatly improved, thereby contributing to energy saving and reducing detection costs. Furthermore, by setting a detection channel through which the thermal protector flows within the detection chamber, continuous detection of the thermal protector is achieved, greatly improving detection efficiency.
[0008] The technical solution of this utility model is implemented as follows: a detection device for a thermal protector, characterized in that it includes: a hot air generating box, the hot air generating box having an electric heating element inside; a detection box having a detection channel through which the thermal protector flows; the detection box and the hot air generating box are arranged side by side, and the inner cavity of the detection box and the inner cavity of the hot air generating box are interconnected at both ends; an electric fan mechanism, the electric fan mechanism is disposed at one end of the detection box and the hot air generating box, and is connected between the inner cavity of the detection box and the inner cavity of the hot air generating box, so that the hot airflow between the detection box and the hot air generating box can be circulated for heating and utilization.
[0009] Furthermore, the two ends of the hot air generating box are respectively provided with a first hot air outlet and a waste heat air inlet, and the two ends of the detection box are also respectively provided with a first hot air inlet and a waste heat air outlet. The first hot air outlet and the first hot air inlet are respectively connected to the air inlet and air outlet of the electric fan mechanism, and the waste heat air outlet is connected to the waste heat air inlet.
[0010] Furthermore, an air inlet plate is provided inside the detection box located above the conveyor belt, and the bottom plate of the air inlet plate is evenly provided with a number of air inlet holes that extend to the conveyor belt.
[0011] Furthermore, a hot air duct is provided inside the detection chamber located on the inner side of the air inlet plate. A second hot air inlet, which communicates with the first hot air inlet, is provided on the back of the hot air duct. A plurality of third hot air inlets are evenly provided on the front of the hot air duct along its length. A plurality of fourth hot air inlets, which communicate with the third hot air inlets, are correspondingly provided on the back side plate of the air inlet plate.
[0012] The beneficial effects of this utility model are:
[0013] Firstly, in this invention, the inner cavity of the detection chamber and the inner cavity of the hot air generating chamber are connected by an electric fan mechanism to achieve airflow circulation. This allows the residual hot air, which has cooled down after heat exchange with the thermal protector, to be introduced into the hot air generating chamber for reheating and recycling, thus achieving hot airflow circulation heating and utilization. This not only greatly reduces the heat load of the hot air generating chamber but also significantly shortens the heating time, thereby ensuring that the temperature inside the detection chamber remains constant. This not only ensures the accuracy of the detection but also reduces the detection cost of the detection device.
[0014] Secondly, the detection channel through which the thermal protector flows allows the thermal protector to continuously enter the detection chamber, use the heat brought by the hot air to test its performance indicators, and then leave the detection chamber, thus achieving continuous detection and greatly improving detection efficiency. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.
[0016] Figure 2 This is a schematic diagram of the internal structure of the detection chamber and the hot air generating chamber in this utility model.
[0017] Figure 3 This is a structural breakdown diagram of the detection box in this utility model.
[0018] Figure 4 This is a schematic diagram of the internal structure of the detection box in this utility model. Figure 2 .
[0019] Figure 5 This is a schematic diagram showing the disassembled structure of the hot air generating box in this utility model.
[0020] Figure 6 This is a schematic diagram of the hot air duct structure in this utility model. Figure 1 .
[0021] Figure 7 This is a schematic diagram of the hot air duct structure in this utility model. Figure 2 .
[0022] Figure 8 This is a schematic diagram of the air inlet plate component in this utility model. Detailed Implementation
[0023] To enable those skilled in the art to better understand the technical solution of this utility model, the technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings.
[0024] like Figure 1 , 2As shown, this utility model provides a detection device for a thermal protector. To achieve the purpose of this utility model, it includes a hot air generating box 2, which has an electric heating element 24 inside; a detection box 1, which has a detection channel 10 through which the thermal protector flows; the detection box 1 and the hot air generating box 2 are arranged side by side, and the inner cavity of the detection box 1 and the inner cavity of the hot air generating box 2 are interconnected at both ends; an electric fan mechanism 4 is disposed at one end of the detection box 1 and the hot air generating box 2, and is connected between the inner cavity of the detection box 1 and the inner cavity of the hot air generating box 2, so that the hot airflow between the detection box 1 and the hot air generating box 2 can be circulated for heating and utilization. This method of circulating and utilizing the hot airflow between the detection chamber 1 and the hot air generating chamber 2 allows the waste heat airflow after heat exchange with the thermal protector to be circulated back into the hot air generating chamber 2 for reheating and reuse, thereby achieving comprehensive heat utilization and energy saving and emission reduction. The side-by-side arrangement of the detection chamber 1 and the hot air generating chamber 2 makes the entire device compact and saves floor space. It also shortens the distance between the inner cavity of the detection chamber 1 and the inner cavity of the hot air generating chamber 2, thereby greatly reducing heat loss due to heat diffusion to the external environment during hot airflow circulation, which in turn contributes to energy saving and emission reduction.
[0025] like Figure 2 , 3 As shown in Figures 4 and 4, the hot air generating chamber 2 is provided with a first hot air outlet 21 and a waste heat air inlet 22 at both ends, and the detection chamber 1 is also provided with a first hot air inlet 11 and a waste heat air outlet 12 at both ends. The first hot air outlet 21 and the first hot air inlet 11 are respectively connected to the air inlet and air outlet of the electric fan mechanism 4, and the waste heat air outlet 12 is connected to the waste heat air inlet 22. In this way, under the action of the electric fan mechanism 4, the heated hot airflow flows from the first hot air outlet 21 to the first hot air inlet 11 and enters the detection chamber 1. The waste heat airflow after exchanging heat with the thermal protector flows out from the waste heat air outlet 12 and flows into the hot air generating chamber 2 through the waste heat air inlet 22, realizing the circulation of hot airflow in the hot air generating chamber 2 and the detection chamber 1, and making the connection between the hot air generating chamber 2 and the detection chamber 1 tighter, thereby helping to reduce the heat loss when the hot airflow flows between the two.
[0026] like Figure 1 , 2As shown in Figures 3 and 4, the system also includes a conveyor belt 3 arranged along the detection channel 10. The conveyor belt 3 enters the detection chamber 1 from one end of the waste heat air outlet 12 and exits from one end of the detection chamber 1 from the first hot air inlet 11. In this way, the thermal protector to be tested can be continuously transported into the detection chamber 1 for testing by the conveyor belt 3. The movement direction of the thermal protector is set opposite to the flow direction of the hot air, which makes the heat exchange efficiency between the hot air and the thermal protector high. This ensures that the temperature of the thermal protector can quickly reach the set detection temperature, causing the moving contact plate on the thermal protector to spring up, thus ensuring the accuracy of the test.
[0027] like Figure 3 As shown, an air inlet plate 13 is also provided inside the detection box 1 located above the conveyor belt 3. The bottom plate of the air inlet plate 13 is evenly provided with a plurality of air inlet holes 131 that extend to the conveyor belt 3. In this way, the hot airflow can flow more evenly to the entire conveyor belt 3, making the temperature distribution in the entire detection area more uniform, thereby ensuring that the thermal protector under test is heated evenly and improving the accuracy of the detection; at the same time, it can also prevent the thermal protectors from being blown away or stacked together by the excessive force of the hot airflow, which would affect the accuracy of the detection.
[0028] like Figure 3 , 6 As shown in Figure 7, a hot air duct 14 is also provided inside the detection chamber 1 located inside the air inlet plate 13. The back of the hot air duct 14 has a second hot air inlet 141 that communicates with the first hot air inlet 11, and the front of the hot air duct 14 has multiple third hot air inlets 142 evenly distributed along its length. Correspondingly, multiple fourth hot air inlets 132 that communicate with the third hot air inlets 142 are provided on the back side plate of the air inlet plate 13. In this way, the hot airflow can flow relatively evenly to the air inlet plate 13 through the third hot air inlets 142 and the fourth hot air inlets 132, and then flow to the detection area where the conveyor belt 3 is located through the air inlet throughlet 131, making the temperature distribution of the entire detection area more uniform, thereby ensuring the accuracy of the detection.
[0029] like Figure 3 , 4 As shown, a baffle plate 15 is provided on the top of the air inlet plate 13, and the fourth hot air inlet 132 is located below the baffle plate 15. In this way, the high-temperature airflow can be concentrated and directed to the detection area by the baffle plate 15, avoiding heat loss, improving the efficiency of hot air use, and thus helping to reduce energy consumption.
[0030] like Figure 3As shown, at least two adjusting perforated plates 16 are also provided on the air inlet plate 13, thus dividing the detection area where the conveyor belt 3 is located into at least two small detection areas. The adjusting perforated plates 16 can fine-tune the airflow of the hot air entering the small detection area, making the temperature in each small detection area more uniform and further improving the accuracy of the thermal protector detection. In order to monitor the temperature of the detection area inside the detection chamber 1 in real time, multiple thermocouples 5 are also provided on the top cover of the detection chamber 1 and inserted into the small detection areas.
[0031] like Figure 2 , 5 As shown, the hot air generating housing 2 is equipped with an integrated plate 23, and the electric heating element 24 is integrated on the bottom surface of the integrated plate 23. In this way, during assembly, the electric heating element 24 can be fixed on the integrated plate 23 first, and then installed into the hot air generating housing 2. During maintenance, all the electric heating elements 24 can be taken out by removing the integrated plate 23 for inspection and repair, which is very convenient.
[0032] like Figure 1 , 2 As shown in Figures 3 and 4, the length of the detection chamber 1 is greater than the length of the hot air generating chamber 2. The detection chamber 1 and the hot air generating chamber 2 are flush at one end, so that a fan position 40 for the power supply fan mechanism 4 is formed between the other ends of the detection chamber 1 and the hot air generating chamber 2. This makes the layout of the entire device very compact, thereby saving floor space.
[0033] like Figure 1 , 2 As shown in Figures 3 and 4, a first hot air inlet 11 and a first hot air outlet 21 are respectively provided on the side walls of the detection box 1 and the hot air generating box 2 located next to the fan position 40. At the same time, the waste hot air outlet 12 and the waste hot air inlet 22 are aligned and connected together; in this way, the hot air flow can achieve internal hot air circulation between the detection box 1 and the hot air generating box 2 without the need for additional pipes, thereby effectively avoiding energy loss when the hot air flows between the detection box 1 and the hot air generating box 2.
Claims
1. A detection device for a thermal protector, characterized in that... include: A hot air generating box (2) is provided with an electric heating element (24) inside the hot air generating box (2); A detection box (1) has a detection channel (10) through which the heating protector flows; the detection box (1) and the hot air generating box (2) are arranged side by side, and the inner cavity of the detection box (1) and the inner cavity of the hot air generating box (2) are connected to each other at both ends. An electric fan mechanism (4) is provided at one end of the detection box (1) and the hot air generating box (2), and is connected between the inner cavity of the detection box (1) and the inner cavity of the hot air generating box (2), so that the hot airflow can be circulated and heated between the detection box (1) and the hot air generating box (2) and utilized.
2. The detection device for the thermal protector according to claim 1, characterized in that: The hot air generating box (2) is provided with a first hot air outlet (21) and a waste heat air inlet (22) at both ends. The detection box (1) is also provided with a first hot air inlet (11) and a waste heat air outlet (12) at both ends. The first hot air outlet (21) and the first hot air inlet (11) are respectively connected to the air inlet and air outlet on the electric fan mechanism (4). The waste heat air outlet (12) is connected to the waste heat air inlet (22).
3. The detection device for the thermal protector according to claim 2, characterized in that: It also includes a conveyor belt (3) arranged along the detection channel (10), which enters the detection chamber (1) from one end of the waste heat air outlet (12) and exits the detection chamber (1) from one end of the first hot air inlet (11).
4. The detection device for the thermal protector according to claim 3, characterized in that: An air inlet plate (13) is also provided in the detection box (1) located above the conveyor belt (3). The bottom plate of the air inlet plate (13) is evenly provided with a number of air inlet holes (131) that extend to the conveyor belt (3).
5. The detection device for the thermal protector according to claim 4, characterized in that: A hot air duct (14) is also provided inside the detection box (1) located inside the air inlet plate (13). The back of the hot air duct (14) is provided with a second hot air inlet (141) that communicates with the first hot air inlet (11). The front of the hot air duct (14) is provided with a plurality of third hot air inlets (142) evenly distributed along its length. The back side plate of the air inlet plate (13) is provided with a plurality of fourth hot air inlets (132) that communicate with the third hot air inlets (142).
6. The detection device for the thermal protector according to claim 5, characterized in that: A baffle plate (15) is provided on the top of the air inlet plate (13), and the fourth hot air inlet (132) is located below the baffle plate (15).
7. The detection device for the thermal protector according to claim 4, characterized in that: An adjustment plate (16) is also placed on the air inlet plate (13).
8. The detection device for the thermal protector according to claim 1, characterized in that: The hot air generating box (2) is provided with an integrated plate (23), and the electric heating element (24) is integrated on the bottom surface of the integrated plate (23).
9. The detection device for the thermal protector according to claim 2, characterized in that: The length of the detection box (1) is greater than the length of the hot air generating box (2). The detection box (1) and the hot air generating box (2) are flush at one end, so that a fan position (40) for placing the power supply fan mechanism (4) is formed between the other end of the detection box (1) and the hot air generating box (2).
10. The detection device for the thermal protector according to claim 9, characterized in that: The first hot air inlet (11) and the first hot air outlet (21) are respectively provided on the side walls of the detection box (1) and the hot air generating box (2) located next to the fan position (40).