Discharge device and test system

Abstract

The present invention provides a discharge device and a test system, which relate to the field of air conditioning technology, and solve the technical problems of low efficiency and labor-consuming manual discharge after capacitor performance testing. The discharge device includes a base, a first terminal arranged on the base, and a discharge element connected to the first terminal through a discharge circuit. Automatic discharge is achieved after the component to be discharged contacts the first terminal; the test system includes a test device, a discharge device and a switching device. The state switching of the switching device can make the component to be discharged electrically connected to the test device or the discharge device in a selective manner. The present invention has an automatic discharge function, stable discharge, high efficiency, wide application range, good safety, and realizes the integration of testing and discharge, saving labor costs.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to a discharge device and a test system for a high-voltage electrolytic capacitor. Background Art

[0002] High-voltage electrolytic capacitors are widely used in various air-conditioning circuits to achieve filtering, decoupling, DC isolation, energy storage and other functions. Their performance tests (leakage current test, explosion-proof test, overload voltage test, etc.) are necessary contents and key quality indicators of factory inspection.

[0003] The applicant has found that the prior art has at least the following technical problems:

[0004] At present, after various charging test experiments (leakage current test, explosion-proof test, overload voltage test, etc.) for high-voltage capacitors, the discharge method is to use a handheld discharge belt to contact discharge the two ends of the capacitor pins. In actual operation, this method has safety issues such as contact sparking due to human factors, incomplete discharge and residual pressure, as well as long discharge time, labor-intensive testing, and low test efficiency. Summary of the invention

[0005] The object of the present invention is to provide a discharge device and a test system for a high-voltage electrolytic capacitor, so as to solve the technical problems in the prior art of low efficiency and labor-intensive manual discharge after capacitor performance testing.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] The present invention provides a discharge device, comprising a base, a first terminal arranged on the base, and a discharge element connected to the first terminal through a discharge circuit, wherein automatic discharge is achieved after the discharge component contacts the first terminal.

[0008] As a further improvement of the present invention, the discharge device further includes a residual voltage monitoring device, and the residual voltage monitoring device is connected in parallel with the discharge element to the discharge circuit.

[0009] As a further improvement of the present invention, the first wiring terminal includes two wiring clamps, and the two wiring clamps are movably arranged on the base. By adjusting the distance between the two, they are suitable for components to be discharged with different specifications.

[0010] As a further improvement of the present invention, the two wiring clamps are arranged in parallel.

[0011] As a further improvement of the present invention, the wiring fixture comprises a base and a presser foot assembly movably arranged on the base, a slideway is arranged on the base, a slideway matched with the slideway is arranged on the base, and a fixed foot portion is formed between the presser foot assembly and the base. The presser foot assembly is movably arranged on the base to adjust the length of the fixed foot portion.

[0012] As a further improvement of the present invention, the presser foot assembly includes a presser foot plate, a fixed plate, a connecting rod and an elastic member, the base body is a U-shaped structure, the fixed plate and the presser foot plate are arranged side by side in the U-shaped concave cavity of the base body, the elastic member is arranged between the fixed plate and the presser foot plate, one end of the connecting rod is connected to the fixed plate, and the other end is fixed to the base, and the fixed foot portion is formed between the presser foot plate and the bottom of the U-shaped concave cavity of the base body.

[0013] As a further improvement of the present invention, the two wiring clamps are mirror-symmetrical structures. When the two wiring clamps are attached together, the pressure foot is attached to the bottom of the U-shaped cavity of the seat body, and the elastic member is in a naturally extended state.

[0014] As a further improvement of the present invention, the seat body and the base are made of insulating material, the presser foot assembly is made of conductive material, and the discharge circuit is electrically connected to the presser foot assembly.

[0015] The present invention provides a test system, comprising a test device, the discharge device and a switching device. The state switching of the switching device can enable the component to be discharged to be electrically connected to the test device or the discharge device in an alternative manner.

[0016] As a further improvement of the present invention, the switching device is connected to the discharge circuit connected to one side of the first terminal, one end of the testing device is connected to the switching device, and the other end of the testing device is connected to the discharge circuit connected to the other side of the first terminal.

[0017] As a further improvement of the present invention, the testing device comprises a second wiring terminal, and the second wiring terminal is respectively connected to the switching device and the discharge circuit through a testing circuit.

[0018] The present invention provides a method for operating the test system, comprising the following steps:

[0019] Step A: adjusting the distance between the two wiring clamps in the first wiring terminal according to the specifications of the electrolytic capacitor;

[0020] Step B: Insert the two pins of the electrolytic capacitor into two wiring clamps to fix them;

[0021] Step C: Switch the state of the switching device to the discharge gear, so that the electrolytic capacitor is electrically connected to the discharge device, and determine whether the electrolytic capacitor is correctly installed by the positive or negative residual voltage value displayed by the residual voltage monitoring device;

[0022] Step D: After confirming that the electrolytic capacitor is correctly installed, connect the test equipment to the second terminal. After the test equipment is debugged, switch the state of the switching device to the test gear, and perform a charging test on the electrolytic capacitor through the test equipment;

[0023] Step E: After the charging test of the electrolytic capacitor is completed, the state of the switching device is switched to the discharge gear, and the discharge circuit is used to achieve circuit conduction between the electrolytic capacitor and the discharge element to discharge, and the voltage value of the residual voltage monitoring device is observed during the discharge process. When the voltage value is lower than 2VDC, the entire test and discharge process is completed.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The invention provides a test system for a high-voltage electrolytic capacitor, comprising a discharge device, a test device and a switching device. The discharge device comprises a discharge belt as a discharge element, a first terminal as a structure for fixing a pin of an electrolytic capacitor, a discharge circuit connected with the discharge belt and the first terminal, a voltmeter or a multimeter connected in parallel with the discharge belt as a residual voltage monitoring device, and the test device comprises two terminals as second terminals, and a test circuit connecting the two terminals with the discharge circuit and the switching device. Since the distance between two terminal clamps on the first terminal is adjustable, the system is suitable for use with electrolytic capacitors of different specifications and has a wide range of applications. The discharge element and the residual voltage monitoring device made of the discharge belt, the voltmeter or the multimeter can effectively discharge the electrolytic capacitor and monitor the residual voltage, thereby ensuring the safety of the test. The terminal clamp can automatically fix the pin of the electrolytic capacitor, thereby avoiding the problem of instability of discharge of the handheld discharge belt. The clamp clamps the pins through an elastic member, thereby ensuring the stability of the test. The external test circuit terminal, the discharge device and the universal terminal clamp are adopted to solve the problems of repeated wiring of samples and stability of the test, thereby realizing the integration of test and discharge, and saving labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 It is a schematic diagram of the three-dimensional structure of the test system of the present invention;

[0028] Figure 2 It is a circuit diagram of the test system of the present invention;

[0029] Figure 3 is a top view of the test system of the present invention;

[0030] Figure 4 is a side view of the test system of the present invention;

[0031] Figure 5 is an exploded stereoscopic view of a wiring fixture in a discharge device in a test system of the present invention;

[0032] Figure 6 is an exploded top view of a wiring fixture in a discharge device in a test system of the present invention;

[0033] Figure 7 It is a schematic diagram of the structure of a three-position two-speed toggle switch in the test system of the present invention;

[0034] Figure 8 It is a schematic structural diagram of a high-voltage electrolytic capacitor as a discharged component in the present invention.

[0035] In the figure, 1, base; 11, slide; 2, first terminal; 21, wiring fixture; 211, seat; 2111, slide; 212, presser foot assembly; 2121, presser foot plate; 2122, fixing plate; 2123, connecting rod; 2124, elastic member; 3, discharge element; 4, residual pressure monitoring device; 5, second terminal; 6, three-position two-speed shift switch; 100, discharge circuit; 200, high-voltage electrolytic capacitor; 300, test circuit. DETAILED DESCRIPTION

[0036] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0037] like Figure 1 and Figure 5 As shown, the present invention provides a discharge device, including a base 1, a first terminal 2 disposed on the base 1, and a discharge element 3 connected to the first terminal 2 through a discharge circuit 100, and automatic discharge is achieved after the discharge component contacts the first terminal 2. In the present invention, Figure 8 As shown, a high-voltage electrolytic capacitor 200 is taken as an example of a component to be discharged for detailed description.

[0038] When in use, after the pin of the high-voltage electrolytic capacitor 200 that needs to be discharged is connected to the first terminal 2, the discharge step of the high-voltage electrolytic capacitor 200 is automatically implemented through the discharge element 11, and the discharge work can be completed without manually holding the pin and the discharge circuit 100, avoiding the technical problems of low efficiency and labor-consuming manual discharge.

[0039] like Figure 2 As shown, as an optional embodiment, the discharge device further includes a residual voltage monitoring device 4, which is connected in parallel with the discharge element 3 to the discharge circuit 100. The residual voltage monitoring device 4 can measure the residual voltage value of the high-voltage electrolytic capacitor 200, detect in real time whether the discharge is complete, and further improve the discharge efficiency. Specifically, the residual voltage monitoring device 4 is a voltmeter or a multimeter.

[0040] like Figure 3 and Figure 4 As shown, specifically, the first terminal 2 includes two wiring clamps 21, which are movably arranged on the base 1, and the distance between the two wiring clamps is adjusted to be suitable for components to be discharged of different specifications. Since the distance between the two pins of high-voltage electrolytic capacitors 200 of different specifications is different, in order to improve the application range of the discharge device, the two wiring clamps 21 are movably arranged on the base 1, so that the positions of the two wiring clamps 21 on the base 1 can be adjusted, that is, the distance between the two wiring clamps 21 can be adjusted, so as to meet the use requirements of different pin spacings.

[0041] It should be noted that, in the present invention, the two wiring clamps 21 are arranged in parallel on the base 1 , and the two wiring clamps 21 can move left and right along the length direction of the base 1 .

[0042] like Figure 1 and Figure 3 As shown, further, the wiring clamp 21 includes a base 211 and a presser foot assembly 212 arranged on the base 211, a slideway 11 is arranged on the base 1, a slide groove 2111 adapted to the slideway 11 is arranged on the base 211, and a fixed foot portion is formed between the presser foot assembly 212 and the base 211. The pins of the high-voltage electrolytic capacitor 200 are fixed in the fixed foot portion and are tightly pressed in the fixed foot portion by the presser foot assembly 212. The wiring clamp 21 is electrically connected to the discharge circuit 100 so that the high-voltage electrolytic capacitor 200 connected to the wiring clamp 21 can be electrically connected to the discharge circuit 100.

[0043] Specifically, in the present invention, there are two slides 11, and the two slides 11 are respectively arranged at the two ends of the width direction of the base 1. The slide 11 is V-shaped, and the opening faces the two side edges of the base 1; the slide groove 2111 is arranged at the bottom of the seat body 211. When in use, the seat body 211 is inserted from one end of the length direction of the base 1, so that the two slide grooves 2111 are respectively slidably connected with the two slides 11. Since the slide 11 is an inwardly recessed V-shaped structure, an outward protruding structure is formed between the top of the slide 11 and the top of the base 1. The protruding structure can limit the seat body 21 in the width direction and the vertical direction, so that the seat body 211 can only move along the length direction of the base 1.

[0044] Furthermore, the presser foot assembly 212 is movably arranged on the base 21 to adjust the length of the fixed foot portion. By adjusting the length of the fixed foot portion, the applicable range of the discharge device can be further improved, that is, by adjusting the distance between the two wiring clamps 21 and by adjusting the length of the fixed foot portion, a two-level adjustment can be achieved, so that the pin spacing of the discharge device has a large adjustment range, so as to be applicable to electrolytic capacitors of more specifications.

[0045] like Figure 5 and Figure 6As shown, further, the presser foot assembly 212 includes a presser foot plate 2121, a fixing plate 2122, a connecting rod 2123 and an elastic member 2124. The seat body 211 is U-shaped when viewed from above, including a bottom wall and two side walls. The bottom walls of the seat body 211 in the two wiring clamps 21 are arranged relatively to each other, and the two slide grooves 2111 are respectively arranged on the inner side of the bottom of the two side walls of the seat body 211, that is, the two slide grooves 2111 are arranged relatively to the bottom of the seat body 211, and the distance between the two slide grooves 2111 is equal to the distance between the two slideways 11 on the base 1, and the slide grooves 2111 are arranged along the length direction of the side walls. In order to improve the aesthetics of the product, a step portion is arranged on the base 1, and the slideway 11 is arranged on the step portion. When the seat body 211 is installed on the slideway 11, the outer contour line of the two side walls of the seat body 211 is consistent with the widest contour of the base 1 The lines are arranged flush so that the seat body 211 does not protrude from the base 1; the fixed plate 2122 and the presser foot plate 2121 are arranged side by side in the U-shaped cavity of the seat body 211, and the specifications of the fixed plate 2122 are smaller than those of the presser foot plate 2121. In order to ensure the stability of movement, the lengths of the fixed plate 2122 and the presser foot plate 2121 on the side perpendicular to the moving direction are equal to the length of the U-shaped cavity, the height of the presser foot plate 2121 is the same as the height of the U-shaped cavity, and the height of the fixed plate 2122 is less than the height of the U-shaped cavity; the elastic member 2124 is arranged between the fixed plate 2122 and the presser foot plate 2121, one end of the connecting rod 2123 is connected to the fixed plate 2122, and the other end is fixed on the base 1, and a fixed foot portion is formed between the presser foot plate 2121 and the bottom of the U-shaped cavity of the seat body 211, that is, the bottom wall of the seat body 211. The setting of the elastic member 2124 can make the presser foot 2121 produce a slight displacement when it is pressed, and after the presser foot 2121 is displaced, the elastic force of the elastic member 2124 applies pressure to the presser foot 2121 to ensure the stable fixation of the pin.

[0046] It should be noted that, in the present invention, there are many ways to fix the connection between the connecting rod 2123 and the base 1, such as Figure 1 As shown, a fixing hole is opened on the base 1, and the connecting rod 2123 is screwed or plugged into the fixing hole to achieve a fixed connection with the base 1; Figure 3As shown, a strip-shaped fixing hole can also be opened on the base 1, a nut is set in the strip-shaped fixing hole, a threaded section is set at the end of the connecting rod 2123, and then the connecting rod 2123 is screwed on the nut in the strip-shaped fixing hole to achieve a fixed connection; of course, in addition to the two fixing structures described above, other fixing structures can also be used as long as the connecting rod 2123 can be fixed on the base 1. Since the base 211 is U-shaped with a concave cavity in the middle, although the connecting rod 2123 is fixedly connected to the base 1, it will not affect the relative movement of the base 211 along the base 1, but the connection position of the connecting rod 2123 and the base 1 requires that when the two bases 211 are in the closest position, the fixing plate 2122 is located at the outermost position in the concave cavity of the base 211, but cannot be out of the concave cavity of the base 211.

[0047] Furthermore, the two wiring clamps 21 are of mirror-symmetrical structure. When the two wiring clamps 21 are attached together, the pressure plate 2121 is attached to the bottom of the U-shaped cavity of the seat body 211, and the elastic member 2124 is in a naturally extended state.

[0048] The seat body 211 and the base 1 are both made of insulating materials, the presser foot assembly 212 is made of conductive materials, and the discharge circuit 100 is electrically connected to the presser foot assembly 212. Specifically, the seat body 211 and the base 1 are both made of bakelite. The presser foot assembly 212 is made of conductive metal materials, such as steel and iron.

[0049] The elastic member 2124 is a spring. The discharge element 3 is a discharge belt.

[0050] The present invention provides a test system, comprising a test device, a discharge device and a switching device. The state of the switching device can be switched so that a component to be discharged can be electrically connected to the test device or the discharge device in an alternative manner.

[0051] The switching device is connected to the discharge circuit 100 connected to one side of the first terminal 2 , one end of the testing device is connected to the switching device, and the other end of the testing device is connected to the discharge circuit 100 connected to the other side of the first terminal 2 .

[0052] like Figure 7 As shown, the test device includes a second terminal 5, which is connected to the switching device and the discharge circuit 100 through a test circuit 300. In the present invention, the switching device is a three-position two-position toggle switch 6. The three-position two-position toggle switch 6 is implemented by an existing technology product and purchased from the external market.

[0053] Specifically, the base 1 is a hollow rectangular structure, half of which is used to install the discharge device, that is, the right half of the base is used to place the discharge device, and the other half is used to install the test device, that is, the left half of the base is used to place the test device. The base 1 for installing the discharge device is provided with a step portion, and a slide 11 is provided on the step portion. The wiring clamp 21 is slidably set on the base 1, and the second terminal 5 is two terminals arranged side by side on the top of the base 1, and the equipment used for testing is connected to the two terminals; a three-position two-speed shift switch 6 is installed on the top of the base 1 and is located next to the terminals. The discharge belt is located in the half of the base 1 used to install the test device. The discharge circuit 100 and the test circuit 300 are both laid inside the base 1. A multimeter or voltmeter serving as a residual voltage monitoring device 4 is arranged on the side of the left half of the base to observe the voltage value.

[0054] The present invention provides a method for operating a test system, comprising the following steps:

[0055] Step A: adjusting the distance between the two wiring clamps 21 in the first wiring terminal 2 according to the specifications of the electrolytic capacitor;

[0056] Step B: inserting two pins of the electrolytic capacitor into two wiring clamps 21 for fixing;

[0057] Step C: Switch the state of the switching device to the discharge gear, so that the electrolytic capacitor is electrically connected to the discharge device, and determine whether the electrolytic capacitor is correctly installed by displaying the positive or negative residual voltage value of the residual voltage monitoring device 4;

[0058] Step D: After confirming that the electrolytic capacitor is correctly installed, connect the test equipment to the second terminal 5. After the test equipment is debugged, switch the state of the switching device to the test gear, and perform a charging test on the electrolytic capacitor through the test equipment;

[0059] Step E: After the charging test of the electrolytic capacitor is completed, the state of the switching device is switched to the discharge gear, and the discharge circuit 100 is used to achieve circuit conduction between the electrolytic capacitor and the discharge element 3 to discharge, and the voltage value of the residual voltage monitoring device 4 is observed during the discharge process. When the voltage value is lower than 2VDC, the entire test and discharge process is completed.

[0060] The invention provides a test system for a high-voltage electrolytic capacitor, comprising a discharge device, a test device and a switching device. The discharge device comprises a discharge belt as a discharge element, a first terminal as a structure for fixing a pin of an electrolytic capacitor, a discharge circuit connected with the discharge belt and the first terminal, a voltmeter or a multimeter connected in parallel with the discharge belt as a residual voltage monitoring device, and the test device comprises two terminals as second terminals, and a test circuit connecting the two terminals with the discharge circuit and the switching device. Since the distance between two terminal clamps on the first terminal is adjustable, the system is suitable for use with electrolytic capacitors of different specifications and has a wide range of applications. The discharge element and the residual voltage monitoring device made of the discharge belt, the voltmeter or the multimeter can effectively discharge the electrolytic capacitor and monitor the residual voltage, thereby ensuring the safety of the test. The terminal clamp can automatically fix the pin of the electrolytic capacitor, thereby avoiding the problem of instability of discharge of the handheld discharge belt. The clamp clamps the pins through an elastic member, thereby ensuring the stability of the test. The external test circuit terminal, the discharge device and the universal terminal clamp are adopted to solve the problems of repeated wiring of samples and stability of the test, thereby realizing the integration of test and discharge, and saving labor costs. In the prior art, the test circuit 300 and the discharge circuit 100 are designed separately. In the present invention, the switching between the test circuit 300 and the discharge circuit 100 is realized through the action of the three-dimensional two-speed shift switch 6; this process reduces the wiring steps and the instability of the discharge of the handheld discharge belt. As long as the clamp is clamped, the stability of the test can be guaranteed, the terminal is connected to the test circuit, and the circuit is switched by the shift switch without removing the wires.

[0061] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A testing system, characterized in that: It comprises a testing device, a discharging device and a switching device, and the state switching of the switching device can make the component to be discharged electrically connected to the testing device or the discharging device in a selective manner; The discharge device comprises a base, a first terminal disposed on the base, and a discharge element connected to the first terminal via a discharge circuit, and automatic discharge is achieved after the discharge component contacts the first terminal; The first wiring terminal includes two wiring clamps, which are movably arranged on the base, and can be adapted to components to be discharged of different specifications by adjusting the distance between the two; The wiring fixture comprises a base body and a presser foot assembly movably arranged on the base body, a slideway is arranged on the base body, a slideway matched with the slideway is arranged on the base body, and a fixed foot portion is formed between the presser foot assembly and the base body; the base is a hollow rectangular parallelepiped structure, half of which is used to install the discharge device, and the other half is used to install the test device, the base for installing the discharge device is provided with a step portion, the slideway is arranged on the step portion, and the wiring fixture is slidably arranged on the base; The testing device comprises a second terminal, and the second terminal is respectively connected to the switching device and the discharge circuit through a testing circuit; The second terminal is two terminals arranged side by side on the top of the base, and the equipment for testing is connected to the two terminals; a three-position two-speed shift switch is installed on the top of the base, next to the terminals; the discharge belt is located in the half of the base used to install the test device; the discharge circuit and the test circuit are laid inside the base; a multimeter or voltmeter as a residual voltage monitoring device is arranged on the side of the left half of the base, and the voltage value can be observed; The presser foot assembly comprises a presser foot plate, a fixing plate, a connecting rod and an elastic member, the base body is a U-shaped structure, the fixing plate and the presser foot plate are sequentially arranged side by side in the U-shaped concave cavity of the base body, the elastic member is arranged between the fixing plate and the presser foot plate, one end of the connecting rod is connected to the fixing plate, and the other end is fixed to the base, and the fixed foot portion is formed between the presser foot plate and the bottom of the U-shaped concave cavity of the base body; the elastic member can cause the presser foot plate to be displaced when pressed, and after the presser foot plate is displaced, the presser foot plate is pressed by the resilience of the elastic member to ensure the stable fixation of the pin; The two wiring clamps are mirror-symmetrical structures. When the two wiring clamps are attached together, the pressure foot is attached to the bottom of the U-shaped cavity of the seat body, and the elastic member is in a naturally extended state; Switching the state of the switching device to the discharge gear so that the electrolytic capacitor is electrically connected to the discharge device, and judging whether the electrolytic capacitor is correctly installed by displaying the positive or negative residual voltage value of the residual voltage monitoring device; After confirming that the electrolytic capacitor is correctly installed, connect the test equipment to the second terminal, and after the test equipment is debugged, switch the state of the switching device to the test gear, and perform a charging test on the electrolytic capacitor through the test equipment; After the charging test of the electrolytic capacitor is completed, the state of the switching device is switched to the discharge gear, and the discharge circuit is used to achieve circuit conduction between the electrolytic capacitor and the discharge element to discharge, and the voltage value of the residual voltage monitoring device is observed during the discharge process. When the voltage value is lower than 2VDC, the entire test and discharge process is completed.

2. The test system according to claim 1, characterized in that: The discharge device further comprises a residual voltage monitoring device, and the residual voltage monitoring device is connected in parallel with the discharge element to the discharge circuit.

3. The test system according to claim 1, characterized in that: The seat body and the base are made of insulating materials, the presser foot assembly is made of conductive materials, and the discharge circuit is electrically connected to the presser foot assembly.

4. The test system according to claim 3, characterized in that: The switching device is connected to the discharge circuit connected to one side of the first terminal, one end of the testing device is connected to the switching device, and the other end of the testing device is connected to the discharge circuit connected to the other side of the first terminal.

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