Thermoswitch detection device

Abstract

The utility model relates to the field of thermoswitch detection, and discloses a thermoswitch detection device, which comprises a jig, a stabilized voltage supply, an ampere meter, a controller and a probe. The jig is used for placing a to-be-tested product. The stabilized voltage supply is used for conveying rated current to a thermoswitch on a product to be tested. The ammeter is connected in series with the thermoswitch and is used for detecting an actual current value output by the thermoswitch. The controller is electrically connected with the voltage-stabilized source and the ampere meter and used for controlling the current value output by the voltage-stabilized source and recording the conduction time of the thermoswitch. And the probe is used for electrically connecting the thermoswitch on the product to be tested with the ampere meter and the voltage-stabilized power supply. According to the thermoswitch detection device, the high current is transmitted to the thermoswitch, and the thermoswitch can generate heat automatically under the action of the high current, so that the resistance of the thermoswitch and the temperature control function of the thermoswitch are automatically detected, the use of a thermoswitch with a wrong specification or an invalid thermoswitch on a product is avoided, and the product yield is improved.

Description

Technical Field

[0001] The utility model relates to the field of thermal switch detection, in particular to a thermal switch detection device. Background Art

[0002] Thermal switches are commonly used control components. In the production process of electrical products, there is a risk of mixing materials because the shapes of thermal switches of different specifications are similar. It is easy to install thermal switches of wrong specifications on the product, and the thermal switches installed on the product may malfunction, resulting in defective products. Therefore, it is necessary to design a test device that can automatically test the thermal switches installed on the product. Utility Model Content

[0003] In order to overcome the shortcomings of the prior art, the purpose of the utility model is to provide a thermal switch detection device, which can determine whether the specifications of the thermal switch are correct by detecting the current output by the thermal switch on the product and the current conduction time, test whether the temperature control function of the thermal switch is normal, and improve the yield of the product.

[0004] In order to solve the above problems, the technical solution adopted by the utility model is as follows: a thermal switch detection device, characterized in that it includes: a fixture for placing the product to be tested; a voltage-stabilized power supply, for delivering a stable current to the thermal switch on the product to be tested; an ammeter, connected in series with the thermal switch, for detecting the actual current value output by the thermal switch; a controller, electrically connected to the voltage-stabilized power supply and the ammeter, for controlling the current value output by the voltage-stabilized power supply, comparing the actual current value with a preset threshold value interval, and recording the conduction time of the thermal switch; a probe, for electrically connecting the thermal switch on the product to be tested with the ammeter and the voltage-stabilized power supply.

[0005] Compared with the prior art, the beneficial effect of the utility model is that the larger stable current output by the voltage-stabilized power supply is sent to the thermal switch on the product to be tested through the probe, and the deviation between the actual current value output by the thermal switch and the preset current value is detected to determine whether the thermal switch uses the wrong specification of incoming materials. The voltage-stabilized power supply sends a larger current value to the thermal switch, causing the thermal switch to self-heat, and disconnect after reaching the temperature, disconnecting the current, and comparing the current conduction with the pre-set empirical data to test whether the temperature control function of the thermal switch is normal. The thermal switch detection device can prevent the product from using the wrong specification or failed thermal switches, and improve the product yield.

[0006] In the above-mentioned thermal switch detection device, the probe is connected to the cable connecting the voltage-stabilized power supply and the ammeter through a conductive block, and the conductive block is arranged above the fixture through a fixing block.

[0007] In the above-mentioned thermal switch detection device, the fixing block is arranged on a lifting mechanism, and the lifting mechanism drives the probe to approach or move away from the fixture, so that the probe contacts or separates from the two pins of the thermal switch.

[0008] The above-mentioned thermal switch detection device also includes a control panel, which is connected to the controller. The control panel is provided with a power switch, a power indicator light, an alarm indicator light and a plurality of test result indicator lights. The power switch is connected in series to the power supply bus of the voltage-stabilized power supply and the controller, and the power indicator light, the alarm indicator light and the test result indicator light are electrically connected to the controller.

[0009] The above-mentioned thermal switch detection device, the control panel also includes a display screen, the display screen is electrically connected to the controller, and the display screen is used to display the actual current value and the conduction time.

[0010] In the above-mentioned thermal switch detection device, a rotary coding switch and a plurality of switch type indicator lights are provided on the control panel, the rotary coding switch and the switch type indicator lights are electrically connected to the controller, the rotary coding switch is used to select the specification of the thermal switch, and the switch type indicator lights are used to indicate the specification of the thermal switch.

[0011] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a principle block diagram of a thermal switch detection device according to an embodiment of the utility model;

[0013] Figure 2 A schematic front view of a probe structure according to an embodiment of the utility model;

[0014] Figure 3 A schematic top view of a probe structure according to an embodiment of the utility model;

[0015] Figure 4 It is a structural schematic diagram of a control panel according to an embodiment of the utility model.

[0016] Description of Figure Numbers:

[0017] 100 probe, 110 insulation block, 120 conduction block, 200 fixing block, 300 fixture, 400 control panel, 410 power switch, 420 rotary coding switch, 430 power indicator light, 440 alarm indicator light, 450 switch type indicator light, 460 test result indicator light, 470 PLC controller, 471 display screen. DETAILED DESCRIPTION

[0018] The embodiments of the present invention are described in detail below. Figures 1 to 3 The embodiment of the utility model provides a thermal switch detection device, including a fixture 300, a voltage-stabilized power supply, an ammeter, a controller and a probe 100. The fixture 300 is used to place the product to be tested, and the fixture 300 is provided with a receiving slot for receiving the product to be tested. The voltage-stabilized power supply and the ammeter are both electrically connected to the controller, and the controller can control the voltage-stabilized power supply to output stable currents of different sizes to the thermal switch on the product to be tested. The ammeter is used to detect the actual current value output by the thermal switch after flowing through the thermal switch, and feed the current value back to the controller. The controller is also used to record the time when the thermal switch conducts current. The probe 100 is used to connect the thermal switch on the product to be tested in series with the voltage-stabilized power supply and the ammeter.

[0019] The above-mentioned thermal switch detection device transmits a large current to the thermal switch through a voltage-stabilized power supply, and detects the actual current flowing through the thermal switch through an ammeter. By comparing the difference between the actual current value and the current value output by the voltage-stabilized power supply, the resistance value of the thermal switch can be calculated to determine whether the specifications of the thermal switch are correct. When a large current flows through the thermal switch, the thermal switch will generate heat by itself. When the heat generated by the thermal switch itself accumulates to a certain value, the thermal switch will be activated and the circuit will be disconnected. The conduction time of the thermal switch is obtained by detecting the conduction time of the current, and compared with the set interval threshold, it can be determined whether the temperature control function of the thermal switch is normal. By using the thermal switch detection device, it is possible to automatically determine whether the specifications and temperature control functions of the thermal switch on the product are intact, avoid using the wrong specifications of the thermal switch, or use an invalid thermal switch, and improve the yield of the product.

[0020] Reference Figure 2 and Figure 3 , the probe 100 is connected to the cable connecting the voltage-stabilized power supply and the ammeter through the conduction block 120, so as to connect the probe 100 in series to the detection circuit composed of the voltage-stabilized power supply and the ammeter. The conduction block 120 is made of metal and has two through holes, one for passing the cable and the other for passing the probe 100. The bottom end face of the probe 100 is serrated to increase the friction between the probe 100 and the pin of the thermal switch, so as to ensure that the probe 100 can be reliably electrically connected to the thermal switch. The probe 100 and the conduction block 120 are both embedded in an insulating block 110. The probe 100 and the conduction block 120 are connected to the fixed block 200 through the insulating block 110. The fixed block 200 is used to fix the probe 100 on the supporting structure, or to be connected to the lifting mechanism, so that the probe 100 can contact the pin of the thermal switch on the product to be tested. It is understandable that the lifting mechanism may be a pneumatic cylinder or an electric cylinder, which drives the probe 100 to rise and fall in the vertical direction relative to the fixture 300 so that the probe 100 is connected to the two pins of the thermal switch.

[0021] Reference Figure 4 In order to facilitate operation and control, and to display the test results more intuitively, the test device also includes a control panel 400. The control panel 400 is provided with a power switch 410, a power indicator light 430, an alarm indicator light 440, and multiple test result indicator lights 460. The power switch 410 is connected in series to the power supply bus of the voltage-stabilized power supply and the controller to control the power on and off of the entire device. The power indicator light 430, the test result indicator light 460 and the alarm indicator light 440 are all connected to the controller to indicate whether the device is powered on and the test results, respectively. Figure 4 In this embodiment, a display screen 471 is also provided on the control panel 400. The display screen 471 is connected to the controller and can directly display the actual current value detected by the ammeter and the conduction time of the thermal switch.

[0022] It is understandable that the controller can store multiple sets of preset regulated power supply output values, as well as qualified threshold intervals of actual current value and conduction time, to achieve detection of thermal switches of various specifications. Accordingly, the control panel 400 is provided with a rotary coding switch 420 connected to the controller and multiple switch type indicator lights 450, and the type of the selected thermal switch can be switched by rotating the rotary coding switch 420, and the type of the currently selected switch can be indicated by the switch type indicator light 450.

[0023] Reference Figure 4 In this embodiment, the controller selects a PLC controller 470, and the PLC controller 470 is integrated with a liquid crystal display screen 471, which can display the conduction time of the thermal switch and the actual current value detected by the ammeter. The PLC controller 470 stores eight sets of presets, which can test eight types of thermal switches. Taking one of them as an example, the PLC controller 470 controls the voltage-stabilized power supply to output a current of 30A to the thermal switch. According to the resistance value of this type of thermal switch, the real-time current value detected by the ammeter should be within the range of 30±1A. The thermal switch needs about 2.1S to self-heat at a current of 30A to reach its rated operating temperature, that is, the conduction time of the thermal switch should be within 1-3S. If the actual current value of the detected thermal switch is less than 29A, the resistance of the thermal switch is too large, and the top test result indicator light 460 will light up; if the actual current value of the detected thermal switch is greater than 31A, the resistance of the thermal switch is too small, and the bottom test result indicator light 460 will light up; if the actual current value of the thermal switch is within the qualified range, and the conduction time is also within the qualified range, the test result indicator light 460 in the middle will light up; if the actual current value of the thermal switch is within the qualified range, but the conduction time is not within the qualified components, the alarm indicator light 440 will light up.

[0024] It should be noted that in the description of the present invention, if there are any orientation descriptions, such as up, down, front, back, left, right, etc., the orientations or positional relationships indicated are all based on the orientations or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and cannot be understood as a limitation on the present invention.

[0025] In the description of the present utility model, "several" means one or more, "more" means two or more, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used to distinguish the technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0026] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0027] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A thermal switch detection device, characterized in that: include: A fixture (300) for placing the product to be tested; A regulated power supply to deliver a steady current to the thermal switch on the product to be tested; An ammeter, connected in series with the thermal switch, for detecting an actual current value output by the thermal switch; a controller, electrically connected to the regulated power supply and the ammeter, for controlling the current value output by the regulated power supply, comparing the actual current value with a preset threshold value interval, and recording the conduction time of the thermal switch; The probe (100) is used to electrically connect the thermal switch on the product to be tested with the ammeter and the voltage-stabilized power supply.

2. The thermal switch detection device according to claim 1, characterized in that: The probe (100) is connected to a cable connecting the voltage-stabilized power supply and the ammeter via a conducting block (120), and the conducting block (120) is disposed above the fixture (300) via a fixing block (200).

3. The thermal switch detection device according to claim 2, characterized in that: The fixing block (200) is arranged on a lifting mechanism, and the lifting mechanism drives the probe (100) to approach or move away from the fixture (300), so that the probe (100) contacts or separates from two pins of the thermal switch.

4. The thermal switch detection device according to claim 1, characterized in that: The invention also comprises a control panel (400), wherein the control panel (400) is connected to the controller, and the control panel (400) is provided with a power switch (410), a power indicator light (430), an alarm indicator light (440) and a plurality of test result indicator lights (460), wherein the power switch (410) is connected in series to the voltage-stabilized power supply and the power supply bus of the controller, and the power indicator light (430), the alarm indicator light (440) and the test result indicator light (460) are electrically connected to the controller.

5. The thermal switch detection device according to claim 4, characterized in that: The control panel (400) further comprises a display screen (471), the display screen (471) is electrically connected to the controller, and the display screen (471) is used to display the actual current value and the conduction time.

6. The thermal switch detection device according to claim 4, characterized in that: The control panel (400) is provided with a rotary coding switch (420) and a plurality of switch type indicator lights (450); the rotary coding switch (420) and the switch type indicator lights (450) are electrically connected to the controller; the rotary coding switch (420) is used to select the specification of the thermal switch, and the switch type indicator lights (450) are used to indicate the specification of the thermal switch.

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