Temperature relay testing device

Abstract

The utility model discloses a temperature relay testing device, which mainly comprises a drying oven and a temperature monitor provided with a plurality of stations, an internal PCB (printed circuit board) is arranged inside the drying oven, an external PCB and power supply equipment are arranged outside the drying oven, a plurality of clamps used for clamping temperature sensors are arranged on the internal PCB, and a plurality of temperature sensors are arranged on the external PCB. A temperature sensing joint is arranged on each clamp; each temperature sensing joint is connected with one corresponding station, a plurality of acousto-optic units are arranged on the external PCB, and the internal PCB and the external PCB are respectively connected with a power supply device and a temperature monitor. The temperature sensing joint on the clamp can accurately monitor the temperature of the temperature relay in real time, and meanwhile, the internal PCB is provided with eight test jacks, so that the performance of eight temperature relays can be tested at a time, and compared with a conventional method of testing a single device at a time, the efficiency is remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of testing technology, specifically to a temperature relay testing device. Background Technology

[0002] A temperature relay is a controller that controls the on / off state of subsequent circuits based on temperature changes. It protects other components in the circuit from overheating and is widely used in various fields. High-precision temperature relays are particularly important for various components in the circuit, as they can accurately control the temperature to prevent the circuit and components from burning out. Therefore, testing the electrical performance of temperature relays is crucial. The current conventional testing method is the two-screen test method. This involves placing a single temperature relay under test in the center of a high / low temperature chamber and slowly increasing the temperature at a specified rate, observing the changes in the relay's state. The temperature at which the temperature relay activates (opens or closes) is the activation temperature. Conversely, after completing the heating test, the temperature is decreased at a specified rate, and the changes in the temperature relay's state during the cooling process are observed. The temperature at which the temperature relay returns to its initial state (e.g., from open to closed or from closed to open) is the cooling recovery temperature.

[0003] When confirming the heating and cooling recovery temperatures, temperature monitors and multimeters are used to monitor these temperatures. Because the temperature relays have extremely high requirements for the rate of temperature increase or decrease in the high / low temperature chamber, a single test can take hours, resulting in a long testing time. Furthermore, since only one temperature relay can be tested per session, the testing efficiency is very low and completely fails to meet the requirements for high efficiency.

[0004] In conclusion, the current two-screening test method for temperature relays is completely inadequate to meet the requirements for high efficiency. Therefore, it is urgent to find an effective solution to the above-mentioned technical problems. Utility Model Content

[0005] In order to overcome the shortcomings of the existing technology, this utility model proposes a temperature relay testing device.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a temperature relay testing device, mainly composed of an oven and a temperature monitoring instrument with several workstations. An internal PCB board is provided inside the oven, and an external PCB board and power supply equipment are provided outside the oven. A number of clamps for holding temperature sensors are provided on the internal PCB board, and each clamp is provided with a temperature sensing connector. Each temperature sensing connector is connected to one of its corresponding workstations. A number of audio-visual units are provided on the external PCB board. The internal PCB board and the external PCB board are respectively connected to the power supply equipment and the temperature monitoring instrument.

[0007] Furthermore, the audio-visual unit consists of a current-limiting resistor R, a buzzer LS, and a light-emitting diode D; one end of the current-limiting resistor R is the input terminal of the audio-visual unit and is connected to the output terminal of the power supply equipment; the other end of the current-limiting resistor R is connected to the P terminal of the light-emitting diode D via the buzzer LS, and the N terminal of the light-emitting diode D is the output terminal of the audio-visual unit.

[0008] The number of the acousto-optic units is the same as the number of the fixtures and they correspond one-to-one.

[0009] To ensure the effectiveness of this invention, the internal PCB board is connected to the external PCB board and power supply equipment via a high-temperature resistant ribbon cable.

[0010] To further ensure high-temperature resistance, both the internal and external PCB boards are made of liquid crystal polymer, cyanate ester resin, polyethylene naphthalate, or bismaleimide triazine resin.

[0011] The internal PCB board is also provided with test sockets whose number and position correspond one-to-one with the number and position of the fixtures, and each test socket consists of two metal holes.

[0012] The temperature sensing connector is in direct contact with the backplate of the relay for the temperature to be measured.

[0013] The temperature sensor connector is connected to the workstation via a temperature sensing wire.

[0014] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0015] 1. The temperature sensing connector on the fixture of this utility model can monitor the temperature of the temperature relay in real time and accurately. At the same time, the internal PCB board of this utility model has 8 test sockets, so the performance of 8 temperature relays can be tested at one time. Compared with the conventional method of testing a single device at a time, its efficiency is significantly improved.

[0016] 2. This utility model uses an audio-visual unit as the indication for the operation of the temperature relay. When the temperature relay is turned on, the audio-visual unit will emit sound and light, thereby reminding the tester to record the test data from the temperature monitor, which is convenient and quick.

[0017] 3. The internal PCB board of this utility model is placed in the center of the oven, which can ensure the accuracy of temperature measurement inside the oven and make the test results more reliable.

[0018] 4. When the test socket and fixture of this utility model are used together, they can test temperature relays with different pin sizes and are applicable to testing various types of temperature relays. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0020] Figure 2 This is a schematic diagram of the acoustic-optical unit circuit structure of this utility model.

[0021] The reference numerals in the attached diagrams are as follows: 1. Internal PCB board; 2. Fixture; 3. Metal socket; 4. Copper wire inside the board; 5. Temperature sensing wire; 6. Sealing and heat insulation ring; 7. Workstation; 8. Plug; 9. Inner upper socket; 10. Oven; 11. Power supply equipment; 12. Positive terminal of power supply equipment; 13. Negative terminal of power supply equipment; 14. High-temperature resistant ribbon cable; 15. Inner lower socket; 16. Outer left socket; 17. Outer right socket; 18. External PCB board; 19. Temperature monitor; 20. Temperature sensing connector. Detailed Implementation

[0022] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0023] Example

[0024] like Figure 1 As shown, the temperature relay testing device described in this embodiment mainly consists of an oven 10, a temperature monitor 19, an internal PCB board 1, an external PCB board 18, a power supply device 11, a temperature sensor, and a socket 9. The internal PCB board 1 is located inside the oven 10, while the external PCB board 18, the temperature monitor 19, and the power supply device 11 are located outside the oven 10.

[0025] The oven 10, also known as a high / low temperature chamber, is used to precisely adjust and maintain a specific temperature, ensuring that the temperature relay under test is within the set temperature environment. The temperature monitor 19 is used to monitor and measure the temperature of the temperature relay under test in real time and provide data feedback. The temperature monitor 19 is located outside the oven 10 and has several workstations 7. Each "workstation" refers to the specific location or object where the temperature monitor 19 monitors the temperature; each workstation represents an independent monitoring point with a specific function and a numbered identifier.

[0026] The internal PCB board 1 is provided with an inner upper socket 9 and an inner lower socket 15, while the external PCB board 18 is provided with an outer left socket 16 and an outer right socket 17. Each of the inner upper socket 9, inner lower socket 15, outer left socket 16, and outer right socket 17 is provided with a number of plugs 8. It should be noted that the inner upper socket 9, inner lower socket 15, outer left socket 16, and outer right socket 17 have the same structure; this naming is merely for ease of description and differentiation.

[0027] The inner upper socket 9 of the inner PCB board 1 is connected to the negative terminal of the power supply device 11 via a high-temperature resistant ribbon cable 14, while the inner lower socket 15 is connected to the outer right socket 17 on the outer PCB board 18 via the same high-temperature resistant ribbon cable 14. The outer left socket 16 on the outer PCB board 18 is connected to the positive terminal of the power supply device 11 via the same high-temperature resistant ribbon cable 14. When the high-temperature resistant ribbon cable 14 passes through the wall of the oven 10, it needs to be sealed with a heat-insulating ring 6 to achieve heat insulation.

[0028] The internal PCB board 1 is equipped with a number of clamps 2 for holding temperature sensors. Each clamp 2 has a temperature sensing connector 20, and each connector 20 is connected to one of the workstations 7 via a temperature sensing wire 5. That is, each temperature sensor transmits its collected temperature signal to its corresponding workstation 7 through the corresponding connector 20, ensuring that the workstation number on the temperature monitor 19 corresponds to a specific clamp 2. Similarly, when the temperature sensing wires 5 pass through the oven wall 10, they are also protected by a sealing heat insulation ring 6 to achieve heat insulation.

[0029] The internal PCB board 1 has test sockets whose number and position correspond one-to-one with the number and position of the fixtures 2. Each test socket consists of two metal sockets 3, which are used to connect the two pins of the temperature relay under test. During testing, when the pins of the temperature relay under test are connected to the two metal sockets 3, the temperature sensing connector 20 needs to be in direct contact with the back plate of the temperature relay under test in order to collect the temperature in real time. At this time, the temperature when the contacts inside each temperature relay under test are closed or opened will be displayed on the corresponding station 7 of the temperature monitor 19.

[0030] For ease of description, in this embodiment, the upper metal socket 3 in each test socket is referred to as the upper metal socket, and the lower metal socket 3 is referred to as the lower metal socket. All upper metal sockets are connected to the plug 8 on the upper inner socket 9 via the corresponding internal copper wire 4 inside the internal PCB board 1, and all lower metal sockets are connected to the plug 8 on the lower inner socket 15 via the corresponding internal copper wire 4 inside the internal PCB board 1.

[0031] The external PCB board 18 is equipped with a number of sound and light units. When the internal contacts of the temperature relay to be tested are closed, the sound and light unit will emit sound and light to remind the tester to record. Conversely, when the internal contacts of the temperature relay to be tested are open, the sound and light unit will stop emitting sound and light to remind the tester to record.

[0032] The number of the acousto-optic units needs to be the same as the number of test sockets and match one-to-one. Since each test socket corresponds to only one temperature relay to be tested, each acousto-optic unit also corresponds to one temperature relay to be tested.

[0033] The sound and light units all have the same structure, consisting of a current-limiting resistor R, a buzzer LS, and a light-emitting diode D. One end of the current-limiting resistor R is the input terminal of the sound and light unit, and is connected to the output terminal of the power supply device 11 via the external right socket 16. The other end of the current-limiting resistor R is connected to the P-terminal of the light-emitting diode D via the buzzer LS, and the N-terminal of the light-emitting diode D is the output terminal of the sound and light unit. The output terminals of the sound and light unit are connected to the corresponding plugs 8 on the external right socket 17. The power supply device 11 provides a 5V DC voltage to the sound and light unit to ensure its normal operation.

[0034] like Figure 2 As shown, to more clearly illustrate the structure of the acoustic-optical unit, this embodiment uses eight acoustic-optical units, which is the same number as the number of fixture 2 and test sockets, and they correspond one-to-one. For ease of description, the current-limiting resistor R of the first group of acoustic-optical units is labeled R1, the buzzer LS is labeled LS1, the light-emitting diode D is labeled D1, and so on.

[0035] To ensure the high-temperature resistance of the internal PCB board 1 and the external PCB board 18 of this utility model, both the internal PCB board 1 and the external PCB board 18 are made of liquid crystal polymer, cyanate ester resin, polyethylene naphthalate, or bismaleimide triazine resin.

[0036] During testing, the pins of the eight temperature relays to be tested are connected to the two metal sockets of the eight test sockets, and the temperature sensing connector 20 is brought into contact with the backplate of the temperature relays to be tested. Then, the oven 10 is turned on, and the temperature inside the oven 10 rises at a certain rate. When the temperature inside the oven 10 reaches a certain value, the internal contacts of some of the temperature relays to be tested on the internal PCB board 1 will close. At this time, the two corresponding metal sockets 3 will be connected, and a set of sound and light units corresponding to the fixture 2 will emit sound and light, thus reminding the tester to record the closing temperature value and other information. Conversely, when the temperature inside the oven 10 drops to a certain value, the internal contacts of some of the temperature relays to be tested on the internal PCB board 1 will open. At this time, the two corresponding metal sockets 3 will be disconnected, and the set of sound and light units corresponding to the fixture 2 will stop emitting sound and light, thus reminding the tester to record the opening temperature value and other information.

[0037] Using the above device, the values ​​of eight temperature relays can be tested at once, making it highly efficient. Of course, with the above structure, the number of fixtures 2 and the audio-visual unit can be expanded as needed to test even more temperature relays simultaneously.

[0038] As described above, this utility model can be implemented quite well.

Claims

1. A temperature relay testing device, mainly composed of an oven (10) and a temperature monitoring instrument (19) with a number of workstations (7), characterized in that, An internal PCB board (1) is provided inside the oven (10), and an external PCB board (18) and a power supply device (11) are provided outside the oven (10). A number of clamps (2) for holding temperature sensors are provided on the internal PCB board (1), and a temperature sensing connector (20) is provided on each clamp (2). Each temperature sensing connector (20) is connected to one of its corresponding workstations (7). A number of audio-visual units are provided on the external PCB board (18). The internal PCB board (1) and the external PCB board (18) are respectively connected to the power supply device (11) and the temperature monitor (19).

2. The temperature relay testing device according to claim 1, characterized in that, The sound and light unit consists of a current-limiting resistor R, a buzzer LS, and a light-emitting diode D. One end of the current-limiting resistor R is the input terminal of the sound and light unit and is connected to the output terminal of the power supply equipment. The other end of the current-limiting resistor R is connected to the P terminal of the light-emitting diode D via the buzzer LS. The N terminal of the light-emitting diode D is the output terminal of the sound and light unit.

3. A temperature relay testing device according to claim 2, characterised in that The number of the acoustic and optical units is the same as the number of the fixtures (2) and they correspond one-to-one.

4. A temperature relay testing device according to any one of claims 1 to 3, characterised in that, The internal PCB board (1) is connected to the external PCB board (18) and the power supply equipment (11) via a high-temperature resistant cable (14).

5. A temperature relay testing device according to claim 4, characterized in that, Both the inner PCB board (1) and the outer PCB board (18) are made of liquid crystal polymer, cyanate resin, polyethylene naphthalate or bismaleimide triazine resin.

6. A temperature relay testing device according to claim 5, characterized in that, The internal PCB board (1) is also provided with test sockets whose number and position correspond one-to-one with the number and position of the fixture (2).

7. A temperature relay testing device according to claim 4, characterized in that, The temperature sensing connector (20) is in direct contact with the back plate of the relay to be measured.

8. A temperature relay testing device according to claim 7, characterized in that, The temperature-sensitive connector (20) is connected to the workstation (7) via the temperature-sensitive wire (5).

9. The temperature relay testing device of claim 6, wherein, The test socket consists of two metal holes (3).

Images