A test device and method for a dishwasher

Abstract

The application relates to the field of dish-washing machine testing devices, and discloses a testing device and method for a dish-washing machine, a testing device for a dish-washing machine, which comprises a testing box and a plurality of groups of rotating rollers, the two ends of the plurality of groups of rotating rollers are rotationally connected with connecting columns, and a mounting groove is formed in the side wall of the testing box. The dish-washing machine is reciprocally translated on the rotating rollers and the vibrating rollers by sliding of the translation plate along the reciprocating screw rod, and the gas pressure generated in the sealed cavity by the air pressure plate is used for cooperation, so that the vibrating roller is moved to one side of the compression return spring, and finally, under the rebounding action of the return spring, the vibrating roller is rapidly moved upward and hits the bottom of the dish-washing machine, so that the dish-washing machine is vibrated, dynamic deep simulation of a transportation environment is realized, the sealing performance of the dish-washing machine can be tested and judged under a more real working condition environment, and the accuracy of the final test result is improved.

Description

Technical Field

[0001] This invention relates to the field of dishwasher testing devices, specifically to a testing device and method for dishwashers. Background Technology

[0002] As a common household appliance, the performance and reliability of dishwashers are directly related to the user experience and the safety of family property. Among them, the overall sealing performance is one of the most critical technical indicators of dishwashers. Poor sealing performance can lead to water leakage during washing or rinsing, which may not only damage the electrical components inside the machine and cause safety hazards such as short circuits and fires, but may also leak into the kitchen floor or even into downstairs neighbors, causing huge property losses and neighborhood disputes.

[0003] Currently, dishwashers typically undergo rigorous static sealing tests before leaving the factory, such as pressure tests and immersion tests. However, existing static simulation tests cannot simulate the real logistics and transportation environment that dishwashers experience after leaving the factory. During transportation, dishwashers are continuously subjected to complex effects such as road bumps, vehicle start-stop, and centrifugal forces during turns, which will have a certain impact on their sealing performance. Therefore, relying solely on traditional static sealing tests will result in insufficient accuracy of the final test results. Thus, a testing device for dishwashers is proposed. Summary of the Invention

[0004] This invention provides a testing device for dishwashers that simulates a test environment of reciprocating movement and continuous vibration, enabling the testing and judgment of the dishwasher's sealing performance under more realistic working conditions. This improves the accuracy of the final test results and solves the problem mentioned in the background art that the use of traditional static sealing tests leads to insufficient accuracy of the final test results.

[0005] This invention provides the following technical solution:

[0006] A testing device for a dishwasher includes a testing chamber and further includes: multiple sets of rotating rollers, each set of rotating rollers having a connecting column rotatably connected to both ends; a mounting groove is provided on the side wall of the testing chamber, and the other end of each connecting column is fixedly connected to the mounting groove; two sets of piston chambers are provided and fixed to both sides of the outer wall of the testing chamber; a vibrating roller is installed at the bottom of the inner cavity of the testing chamber, the end of the vibrating roller is installed in the piston chamber, and a pneumatic part is provided on the testing chamber to drive the vibrating roller to move up and down; and two sets of positioning boxes are provided and fixed to both sides of the inner cavity of the testing chamber, and a fixing part for clamping the dishwasher from both sides is installed in the positioning box; and translation parts for driving the dishwasher to reciprocate along the multiple sets of rotating rollers are installed on both sides of the testing chamber.

[0007] As a preferred embodiment of the present invention, the fixing part includes a mounting plate, which is slidably connected to the positioning box. An adsorption plate is fixedly connected to the side of the mounting plate facing the middle of the inner cavity of the test chamber. A guide groove is provided on the outer wall of the positioning box. A translation plate is slidably connected in the guide groove. A telescopic sleeve plate is slidably connected to the end of the translation plate facing the mounting plate. The end of the telescopic sleeve plate is fixedly connected to the side wall of the mounting plate. A clamping cylinder is fixedly connected to the translation plate. The telescopic end of the clamping cylinder is fixedly connected to the side wall of the mounting plate.

[0008] As a preferred embodiment of the present invention, the translation part includes a reciprocating screw, which is rotatably connected to the outer wall of the positioning box, and the translation plate is threaded onto the reciprocating screw. A drive motor is fixedly connected to the top of the test box, and a linkage shaft is fixedly connected to one end of the reciprocating screw. The linkage shaft and the drive motor are connected by a pulley set for transmission.

[0009] As a preferred embodiment of the present invention, the inner cavity of the positioning box is surrounded by partitions on both sides to form a sealed cavity. A pressure plate is slidably connected in the sealed cavity. The side wall of the pressure plate is fixedly connected to the side wall of the translation plate by a connecting rod. One side of the sealed cavity is fixed and connected to an air suction pipe. The other end of the air suction pipe is connected to the inner cavity of the test chamber. A one-way valve is provided in the air suction pipe. The bottom of the inner cavity of the test chamber is inclined and covered with anhydrous copper sulfate test paper. A sealing plug is installed on the outer wall of the test chamber at the lower inclined end.

[0010] As a preferred embodiment of the present invention, the pneumatic section includes two sets of piston plates, which are slidably connected to the two side cavities of the piston chamber. A mounting base is fixedly connected to the bottom of the piston plate. A limiting groove is formed between the piston chamber and the mounting groove. Both ends of the vibrating roller are rotatably connected to limiting rods. The other end of the limiting rod passes through the limiting groove and is fixedly connected to the side wall of the mounting base. A return spring is fixedly connected between the bottom of the mounting base and the bottom of the piston chamber cavity. An inflation pipe is fixedly connected to the other side of the sealing cavity. The other end of the inflation pipe is connected to the inner cavity of the piston chamber, and a one-way valve is provided in the inflation pipe.

[0011] As a preferred embodiment of the present invention, an exhaust pipe is fixedly connected to the bottom of the mounting base, the return spring is wrapped around the outside of the exhaust pipe, the exhaust pipe passes through to the bottom of the piston chamber and is slidably connected thereto, an exhaust groove is provided in the mounting base, the top end of the exhaust groove is connected to the upper cavity of the piston chamber, the bottom end of the exhaust groove is connected to the top end of the exhaust pipe, and a solenoid valve is provided in the exhaust groove, the rotating roller and the connecting column are both hollow and connected, the vibrating roller and the limiting slide rod are both hollow and connected, the connecting column and the limiting slide rod are connected by a gas guide hose, the gas guide hose is located in the mounting groove, multiple sets of the connecting columns are interconnected, and the inner cavity of the limiting slide rod is connected to the exhaust groove.

[0012] As a preferred embodiment of the present invention, a bidirectional telescopic rod is fixed on the outer wall of the piston chamber. The telescopic ends of the bidirectional telescopic rod penetrate into the cavities of the two piston chambers. Pressure sensors are installed on the telescopic ends of the bidirectional telescopic rod. When the telescopic ends of the bidirectional telescopic rod are inserted into the piston chamber, the piston plate is limited above it. When the dishwasher enters the test chamber, the rotating roller and the vibrating roller are flush under its gravity.

[0013] As a preferred embodiment of the present invention, a water injection pipe is installed on the top of the test chamber, a water flow meter is installed on the water injection pipe, and a sealing cover is installed on the top of the test chamber.

[0014] As a preferred embodiment of the present invention, sealing telescopic rods are fixedly connected to both sides of the test box, and a sealing plate is inserted into the top front end of the test box. The telescopic top end of the sealing telescopic rod is fixedly connected to the top of the sealing plate.

[0015] A testing method for dishwashers, comprising the following steps:

[0016] Step 1: Before the test begins, record the initial reading of the water meter on the water supply pipe;

[0017] Step 2: Start the dishwasher and select the standard washing program for which you need to perform a water efficiency test;

[0018] Step 3: Immediately after the dishwasher has completed a full set of wash cycles, record the final water meter reading;

[0019] Step 4: Repeat the above steps multiple times to calculate the water consumption for each test and the average water consumption across multiple tests.

[0020] Step 5: Based on the calculation results and the dishwasher's rated capacity, its water efficiency rating can be determined by comparing it with national mandatory standards.

[0021] Compared with the prior art, the present invention provides a testing device and method for dishwashers, which has the following beneficial effects:

[0022] 1. This testing device for dishwashers uses a sliding plate that slides along a reciprocating screw to allow the dishwasher to move back and forth on rotating and vibrating rollers, thus achieving a preliminary dynamic simulation of the transportation environment. Furthermore, the gas pressure generated by the pressure plate within the sealed cavity causes the vibrating roller to move towards the side of the compression return spring. Finally, the released gas pressure, combined with the rebound of the return spring, causes the vibrating roller to rapidly move upwards and impact the bottom of the dishwasher, generating vibration and achieving a deeper dynamic simulation of the transportation environment. This allows for testing and judging the sealing performance of the dishwasher under more realistic working conditions, thereby improving the accuracy of the final test results.

[0023] 2. The testing device for dishwashers generates negative pressure suction in the sealed cavity during the reciprocating movement of the translation plate, causing the gas in the test chamber to be drawn into the sealed cavity, thereby reducing the air pressure in the test chamber. This keeps the test chamber in a low-pressure state relative to the dishwasher's inner cavity. Combined with the reciprocating movement and vibration, this allows water to penetrate the leakage point more quickly, better enabling the testing of whether the dishwasher has sealing defects, and thus improving the testing accuracy.

[0024] 3. In this test device for dishwashers, when the gas in the piston chamber is continuously discharged along the exhaust channel and exhaust pipe, according to Bernoulli's principle, the exhaust channel will be in a low-pressure state. At this time, the airflow in the rotating roller and the vibrating roller will be drawn into the exhaust channel and discharged together, thereby achieving rapid heat exchange in the rotating roller and the vibrating roller, reducing the heat generated by the dishwasher during repeated friction on the rotating roller and the vibrating roller, and improving wear protection for the bottom of the dishwasher, the rotating roller and the vibrating roller. Attached Figure Description

[0025] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, the elements or parts are not necessarily drawn to actual scale.

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention from a first-view perspective;

[0027] Figure 2 This is a schematic diagram of the overall structure of the present invention from a second perspective;

[0028] Figure 3 This is a partial cross-sectional structural diagram of the test chamber of the present invention;

[0029] Figure 4 For the present invention Figure 3 Enlarged structural diagram of region A in the middle;

[0030] Figure 5 This is a schematic diagram of the internal structure of the positioning box of the present invention;

[0031] Figure 6 This is a partial cross-sectional structural diagram of the positioning box of the present invention;

[0032] Figure 7 This is a schematic diagram of the internal structure of the piston chamber of the present invention;

[0033] Figure 8 This is a schematic diagram of a partial cross-sectional structure of the piston chamber of the present invention;

[0034] Figure 9 This is a flowchart of the testing method in this invention.

[0035] In the diagram: 1. Test box; 2. Sealing telescopic rod; 21. Sealing plate; 3. Rotating roller; 31. Connecting column; 32. Mounting groove; 321. Limiting slide groove; 322. Limiting slide rod; 33. Vibrating roller; 4. Positioning box; 41. Guide groove; 5. Piston chamber; 51. Piston plate; 52. Mounting seat; 521. Exhaust groove; 53. Return spring; 54. Bidirectional telescopic rod; 6. Mounting plate; 61. Adsorption plate; 62. Translation plate; 63. Telescopic sleeve plate; 64. Clamping cylinder; 7. Reciprocating screw; 71. Drive motor; 72. Linkage shaft; 73. Pulley assembly; 8. Sealing cavity; 81. Air pressure plate; 82. Inhalation pipe; 83. Sealing plug; 84. Exhaust pipe; 85. Inflation pipe; 86. Air guide hose; 9. Water injection pipe; 91. Water flow meter; 92. Sealing cover. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Example 1:

[0038] Reference Figures 1-8A testing device for a dishwasher includes a test chamber 1, with sealing telescopic rods 2 fixedly connected to both sides of the test chamber 1. A sealing plate 21 is inserted into the top front end of the test chamber 1, and the telescopic top ends of the sealing telescopic rods 2 are fixedly connected to the top of the sealing plate 21. The device also includes multiple sets of rotating rollers 3, each with a connecting post 31 rotatably connected to both ends. An installation groove 32 is provided on the side wall of the test chamber 1, and the other end of the connecting post 31 is fixedly connected to the installation groove 32. A piston chamber 5 is provided with two sets of pistons. The test chamber 1 is fixed to both sides of the outer wall. The test chamber 1 has a vibrating roller 33 installed at the bottom of the inner cavity. The end of the vibrating roller 33 is installed in the piston chamber 5. The test chamber 1 is provided with a pneumatic part to drive the vibrating roller 33 to move up and down. The positioning box 4 is provided in two sets and is fixed to both sides of the inner cavity of the test chamber 1. The positioning box 4 is provided with a fixing part for clamping the dishwasher from both sides. Both sides of the test chamber 1 are provided with a translation part to drive the dishwasher to move back and forth along multiple sets of rotating rollers 3.

[0039] With the above-described structure, the dishwasher is pushed into the test chamber 1, and its bottom is placed on the rotating roller 3 and the vibrating roller 33. Then, the sealing plate 21 is moved down by the sealing telescopic rods 2 on both sides, thereby sealing the test chamber 1 and forming a relatively sealed testing environment. Subsequently, a dynamic transportation environment is simulated in the test chamber 1, and the sealing performance of the dishwasher during operation is tested in this dynamic simulation environment, so as to obtain test results that are closer to the real working conditions, thereby improving the accuracy of the test results.

[0040] Reference Figures 3-6 The fixing part includes a mounting plate 6, which is slidably connected to the positioning box 4. An adsorption plate 61 is fixedly connected to the side of the mounting plate 6 facing the middle of the inner cavity of the test chamber 1. A guide groove 41 is provided on the outer wall of the positioning box 4. A translation plate 62 is slidably connected in the guide groove 41. A telescopic sleeve plate 63 is slidably connected to the end of the translation plate 62 facing the mounting plate 6. The end of the telescopic sleeve plate 63 is fixedly connected to the side wall of the mounting plate 6. A clamping cylinder 64 is fixedly connected to the translation plate 62. The telescopic end of the clamping cylinder 64 is fixedly connected to the side wall of the mounting plate 6. The translation part includes a reciprocating screw 7, which is rotatably connected to the outer wall of the positioning box 4. The translation plate 62 is threaded onto the reciprocating screw 7. A drive motor 71 is fixedly connected to the top of the test chamber 1. A linkage shaft 72 is fixedly connected to one end of the reciprocating screw 7. The linkage shaft 72 and the drive motor 71 are connected by a pulley group 73.

[0041] With the above-described structure, the clamping cylinders 64 on both sides start working, pushing the suction cups 61 on both sides to move towards the outer wall of the dishwasher simultaneously. Finally, under the action of the squeezing force, the suction cups 61 are tightly attached to the outer wall of the dishwasher, thus fixing the dishwasher. Then, the drive motor 71 is turned on, and the transmission action of the pulley group 73 causes the linkage shafts 72 on both sides to drive the reciprocating screws 7 on both sides to rotate. At this time, the translation plates 62 on both sides will slide back and forth along their corresponding reciprocating screws 7, thereby pushing the dishwasher to translate on the rotating roller 3 and the vibrating roller 33, realizing the dynamic preliminary simulation of the transportation environment, so as to better discover the airtightness defects of the dishwasher in the dynamic environment, thereby improving the accuracy of the test results.

[0042] Reference Figure 5 , Figure 6 and Figure 8 The inner cavity of the positioning box 4 is surrounded by partitions to form a sealed cavity 8 on both sides. A pressure plate 81 is slidably connected in the sealed cavity 8. The side wall of the pressure plate 81 is fixedly connected to the side wall of the translation plate 62 by a connecting rod. One side of the sealed cavity 8 is fixed and connected to a suction pipe 82. The other end of the suction pipe 82 is connected to the inner cavity of the test chamber 1. A one-way valve is installed in the suction pipe 82. The bottom of the inner cavity of the test chamber 1 is inclined and anhydrous copper sulfate test paper is laid on it. A sealing plug 83 is installed on the outer wall of the test chamber 1 at the lower end of the inclination.

[0043] It should be noted that the one-way valve in the suction pipe 82 can only allow the gas in the test chamber 1 to be drawn into the sealed cavity 8.

[0044] With the above structure, during the reciprocating movement of the translation plate 62, the air pressure plates 81 on both sides will slide back and forth in the sealed cavity 8. When the air pressure plate 81 slides away from the inflation tube 85, a negative pressure suction will be generated in the sealed cavity 8, thereby opening the one-way valve in the suction tube 82, so that the gas in the test chamber 1 is sucked into the sealed cavity 8. At this time, after continuously extracting gas from the test chamber 1, the air pressure in the test chamber 1 will be reduced, so that the test chamber 1 is in a low-pressure state relative to the inner cavity of the dishwasher. Combined with the reciprocating movement and vibration, the water flow can penetrate the leakage point more quickly, better realize the test of whether the dishwasher has sealing defects, and thus improve the test accuracy.

[0045] Reference Figure 3 , Figure 7 and Figure 8The pneumatic section includes two sets of piston plates 51, which are slidably connected to the two side cavities of the piston chamber 5. A mounting base 52 is fixedly connected to the bottom of each piston plate 51. A limiting groove 321 is formed between the piston chamber 5 and the mounting groove 32. Both ends of the vibrating roller 33 are rotatably connected to limiting rods 322. The other end of the limiting rod 322 passes through the limiting groove 321 and is fixedly connected to the side wall of the mounting base 52. A return spring 53 is fixedly connected between the bottom of the mounting base 52 and the bottom of the piston chamber 5. The other side of the sealing cavity 8 is fixed and... An inflation tube 85 is connected to the piston chamber 5, and the other end of the inflation tube 85 is connected to the inner cavity of the piston chamber 5. A one-way valve is installed inside the inflation tube 85. A bidirectional telescopic rod 54 is fixed on the outer wall of the piston chamber 5. The telescopic ends of the bidirectional telescopic rod 54 penetrate into the cavities of the piston chambers 5 on both sides. Pressure sensors are installed on the telescopic ends of the bidirectional telescopic rod 54. When the telescopic ends of the bidirectional telescopic rod 54 are inserted into the piston chamber 5, the piston plate 51 is limited above it. When the dishwasher enters the test chamber 1, under its gravity, the rotating roller 3 and the vibrating roller 33 are in a flush state.

[0046] It should be noted that the one-way valve in the inflation tube 85 can only allow the gas in the sealed cavity 8 to enter the piston chamber 5.

[0047] With the above structure, when the air pressure plate 81 slides towards the side closer to the inflation pipe 85, it compresses the gas in the sealed cavity 8 and opens the one-way valve in the inflation pipe 85, allowing the compressed gas to enter the piston chamber 5 along the inflation pipe 85. The continuous influx of gas into the piston chamber 5 increases the gas pressure inside the piston chamber 5. At this time, the pressure sensor at the end of the bidirectional telescopic rod 54 senses the pressure and causes both ends of the bidirectional telescopic rod 54 to retract inward simultaneously, thereby releasing the limiting effect on the piston plate 51. At this time, the high-pressure gas pushes the piston plate 51 to slide towards the side of the compression return spring 53, thereby driving the vibrating roller 33 to move downward and causing the return spring to reset. Spring 53 is gradually charged with energy, and then opens the solenoid valve in the exhaust slot 521, allowing high-pressure gas to be quickly discharged outward along the exhaust pipe 84. At this time, under the rebound action of the return spring 53, the vibrating roller 33 will quickly move upward and hit the bottom of the dishwasher, thereby generating vibration on the dishwasher and realizing dynamic deep simulation of the transportation environment. At the same time, the dishwasher is started, and the anhydrous copper sulfate test paper laid at the bottom of the test box 1 is observed to see if it changes color, that is, whether the dishwasher leaks water when it is started in the dynamic simulation environment. In this way, the sealing performance of the dishwasher can be tested and judged in a more realistic working environment, thereby improving the accuracy of the final test results.

[0048] Reference Figure 7 , Figure 8An exhaust pipe 84 is fixedly connected to the bottom of the mounting base 52. A return spring 53 is wrapped around the outside of the exhaust pipe 84. The exhaust pipe 84 passes through the piston chamber 5 and is slidably connected to it. An exhaust groove 521 is provided in the mounting base 52. The top end of the exhaust groove 521 is connected to the upper cavity of the piston chamber 5, and the bottom end of the exhaust groove 521 is connected to the top end of the exhaust pipe 84. A solenoid valve is provided in the exhaust groove 521. The rotating roller 3 and the connecting column 31 are hollow and connected. The vibrating roller 33 and the limiting slide rod 322 are hollow and connected. The connecting column 31 and the limiting slide rod 322 are connected through a gas guide hose 86. The gas guide hose 86 is located in the mounting groove 32. Multiple sets of connecting columns 31 are interconnected. The inner cavity of the limiting slide rod 322 is connected to the exhaust groove 521.

[0049] With the above structure, when the exhaust trough 521 rapidly discharges gas, according to Bernoulli's principle, the pressure is low in areas with high gas flow rate. Therefore, the exhaust trough 521 will be in a low-pressure state. At this time, since the inner cavities of the rotating roller 3 and the vibrating roller 33 are connected to the exhaust trough 521, the airflow in the rotating roller 3 and the vibrating roller 33 will be drawn into the exhaust trough 521 and discharged together. Subsequently, when the solenoid valve in the exhaust trough 521 is closed, the external airflow will flow back into the rotating roller 3 and the vibrating roller 33 along the exhaust pipe 84 and the exhaust trough 521. This achieves rapid heat exchange in the rotating roller 3 and the vibrating roller 33, reduces the heat generated by the dishwasher during repeated friction on the rotating roller 3 and the vibrating roller 33, and improves the wear protection of the bottom of the dishwasher, the rotating roller 3, and the vibrating roller 33.

[0050] Reference Figure 1 , Figure 2 The test chamber 1 is equipped with a water injection pipe 9 on its top, a water flow meter 91 on its water injection pipe 9, and a sealing cover 92 on its top.

[0051] With the above structure, before the test begins, the water inlet pipe 9 is connected to the dishwasher. The water consumption of the dishwasher during a single operation can be obtained by using the difference in readings of the water flow meter 91 before and after the dishwasher is working. After repeated tests, the average water consumption of the dishwasher is calculated. Then, based on the rated capacity of the dishwasher and in accordance with national mandatory standards, its water efficiency rating can be determined.

[0052] Example 2:

[0053] Reference Figure 9 A testing method for dishwashers, the steps of which are as follows:

[0054] Step 1: Before the test begins, record the initial reading of the water meter on the water supply pipe;

[0055] Step 2: Start the dishwasher and select the standard washing program for which you need to perform a water efficiency test;

[0056] Step 3: Immediately after the dishwasher has completed a full set of wash cycles, record the final water meter reading;

[0057] Step 4: Repeat the above steps multiple times to calculate the water consumption for each test and the average water consumption across multiple tests.

[0058] Step 5: Based on the calculation results and the dishwasher's rated capacity, its water efficiency rating can be determined by comparing it with national mandatory standards.

[0059] Reference Figures 1-8 In this invention, when in use, the dishwasher is first pushed into the test chamber 1 and its bottom is placed on the rotating roller 3 and the vibrating roller 33. Then, the sealing cover 92 is opened, the water inlet pipe 9 is connected to the dishwasher, and then the sealing cover 92 is closed. Finally, the sealing plate 21 is moved down by the sealing telescopic rods 2 on both sides to seal the test chamber 1 and form a relatively sealed testing environment for subsequent testing.

[0060] Next, the clamping cylinders 64 on both sides start working, pushing the suction plates 61 on both sides to move towards the outer wall of the dishwasher simultaneously. Finally, under the action of the squeezing force, the suction plates 61 are tightly attached to the outer wall of the dishwasher. Then, the drive motor 71 is turned on, and the transmission action of the pulley group 73 causes the linkage shafts 72 on both sides to drive the reciprocating screws 7 on both sides to rotate. At this time, the translation plates 62 on both sides will slide back and forth along their corresponding reciprocating screws 7, thereby pushing the dishwasher to move on the rotating roller 3 and the vibrating roller 33, realizing the dynamic preliminary simulation of the transportation environment.

[0061] During the reciprocating movement of the translation plate 62, the air pressure plates 81 on both sides will slide back and forth in the sealed cavity 8. When the air pressure plate 81 slides towards the side closer to the inflation pipe 85, it will compress the gas in the sealed cavity 8 and open the one-way valve in the inflation pipe 85, so that the compressed gas enters the piston chamber 5 along the inflation pipe 85. When the air pressure plate 81 slides away from the side away from the inflation pipe 85, it will generate a negative pressure suction in the sealed cavity 8, thereby opening the one-way valve in the suction pipe 82, so that the gas in the test chamber 1 is sucked into the sealed cavity 8.

[0062] First, the gas continuously entering the piston chamber 5 increases the gas pressure inside the piston chamber 5. At this time, the pressure sensor at the end of the bidirectional telescopic rod 54 will sense the pressure and cause both ends of the bidirectional telescopic rod 54 to retract inward simultaneously, thereby releasing the limiting effect on the piston plate 51. At this time, the high-pressure gas will push the piston plate 51 to slide towards the side of the compression return spring 53, thereby driving the vibrating roller 33 to move downward and gradually storing energy in the return spring 53. Then, the solenoid valve in the exhaust groove 521 is opened, allowing the high-pressure gas to be quickly discharged outward along the exhaust pipe 84. At this time, under the rebound action of the return spring 53, the vibrating roller 33 will quickly move upward and hit the bottom of the dishwasher, thereby generating vibration in the dishwasher and realizing dynamic deep simulation of the transportation environment. At the same time, the dishwasher is started, and the anhydrous copper sulfate test paper laid at the bottom of the test box 1 is observed to see if it changes color, that is, whether the dishwasher leaks water when it is started in a dynamic simulation environment. This allows for testing and judgment of the sealing performance of the dishwasher in a more realistic working environment, thereby improving the accuracy of the final test results. Furthermore, when the exhaust channel 521 rapidly discharges gas, according to Bernoulli's principle, the pressure is low in areas with high gas flow rates. Therefore, the exhaust channel 521 will be in a low-pressure state. At this time, since the inner cavities of the rotating roller 3 and the vibrating roller 33 are connected to the exhaust channel 521, the airflow in the rotating roller 3 and the vibrating roller 33 will be drawn into the exhaust channel 521 and discharged together. Subsequently, when the solenoid valve in the exhaust channel 521 is closed, the external airflow will flow back into the rotating roller 3 and the vibrating roller 33 along the exhaust pipe 84 and the exhaust channel 521. This achieves rapid heat exchange in the rotating roller 3 and the vibrating roller 33, reduces the heat generated by the dishwasher during repeated friction on the rotating roller 3 and the vibrating roller 33, and improves the wear protection of the bottom of the dishwasher, the rotating roller 3, and the vibrating roller 33.

[0063] Secondly, continuously extracting gas from test chamber 1 will reduce the gas pressure inside test chamber 1, making test chamber 1 a low-pressure state relative to the dishwasher's inner cavity. Combined with the reciprocating movement and vibration, this allows water to penetrate the leak point more quickly, better enabling the test to determine whether the dishwasher has sealing defects, thereby improving the test accuracy.

[0064] Components not described in detail in this article are existing technologies.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A testing apparatus for a dishwasher, comprising a testing chamber (1), characterized in that, Also includes: Multiple sets of rotating rollers (3) are provided, and each of the two ends of the multiple sets of rotating rollers (3) is rotatably connected to a connecting column (31). The side wall of the test box (1) is provided with an installation groove (32), and the other end of the connecting column (31) is fixedly connected to the installation groove (32). Piston chamber (5), wherein two sets of piston chamber (5) are provided and are respectively fixed on both sides of the outer wall of the test chamber (1). Among them, a vibrating roller (33) is installed at the bottom of the inner cavity of the test box (1), the end of the vibrating roller (33) is installed in the piston chamber (5), and a pneumatic part is provided on the test box (1) to drive the vibrating roller (33) to move up and down. Positioning boxes (4) are provided in two sets and are respectively fixed on both sides of the inner cavity of the test box (1). The positioning boxes (4) are equipped with fixing parts for clamping the dishwasher from both sides. The test box (1) is equipped with translation parts on both sides to drive the dishwasher to move back and forth along multiple sets of rotating rollers (3); The fixing part includes a mounting plate (6), which is slidably connected to the positioning box (4). An adsorption plate (61) is fixedly connected to the side of the mounting plate (6) facing the middle of the inner cavity of the test box (1). A guide groove (41) is provided on the outer wall of the positioning box (4). A translation plate (62) is slidably connected in the guide groove (41). A telescopic sleeve plate (63) is slidably connected to the end of the translation plate (62) facing the mounting plate (6). The end of the telescopic sleeve plate (63) is fixedly connected to the side wall of the mounting plate (6). A clamping cylinder (64) is fixedly connected to the translation plate (62). The telescopic end of the clamping cylinder (64) is fixedly connected to the side wall of the mounting plate (6). The translation part includes a reciprocating screw (7), which is rotatably connected to the outer wall of the positioning box (4), and the translation plate (62) is threaded onto the reciprocating screw (7). The top of the test box (1) is fixedly connected to a drive motor (71), and one end of the reciprocating screw (7) is fixedly connected to a linkage shaft (72). The linkage shaft (72) and the drive motor (71) are connected by a pulley group (73).

2. The testing apparatus for a dishwasher according to claim 1, characterized in that, The inner cavity of the positioning box (4) is surrounded by partitions to form a sealed cavity (8). A pressure plate (81) is slidably connected in the sealed cavity (8). The side wall of the pressure plate (81) is fixedly connected to the side wall of the translation plate (62) by a connecting rod. One side of the sealed cavity (8) is fixed and connected to a suction pipe (82). The other end of the suction pipe (82) is connected to the inner cavity of the test box (1). A one-way valve is provided in the suction pipe (82). The bottom of the inner cavity of the test box (1) is inclined and covered with anhydrous copper sulfate test paper. A sealing plug (83) is installed on the outer wall of the test box (1) at the lower inclined end.

3. The testing apparatus for a dishwasher according to claim 2, characterized in that, The pneumatic section includes two sets of piston plates (51), which are slidably connected to the two side cavities of the piston chamber (5). The bottom of the piston plate (51) is fixedly connected to a mounting base (52). A limiting groove (321) is opened between the piston chamber (5) and the mounting groove (32). Both ends of the vibrating roller (33) are rotatably connected to limiting rods (322). The other end of the limiting rod (322) passes through the limiting groove (321) and is fixedly connected to the side wall of the mounting base (52). A return spring (53) is fixedly connected between the bottom of the mounting base (52) and the bottom of the cavity of the piston chamber (5). An inflation pipe (85) is fixedly connected to the other side of the sealing cavity (8). The other end of the inflation pipe (85) is connected to the inner cavity of the piston chamber (5). A one-way valve is provided in the inflation pipe (85).

4. A testing device for a dishwasher according to claim 3, characterized in that, An exhaust pipe (84) is fixedly connected to the bottom of the mounting base (52). The return spring (53) is wrapped around the outside of the exhaust pipe (84). The exhaust pipe (84) extends through to the bottom of the piston chamber (5) and is slidably connected thereto. An exhaust groove (521) is provided inside the mounting base (52). The top end of the exhaust groove (521) is connected to the upper cavity of the piston chamber (5), and the bottom end of the exhaust groove (521) is connected to the top end of the exhaust pipe (84). A solenoid valve is provided inside the exhaust groove (521). The rotating roller (3) and the connecting column (31) are both hollow and connected. The vibrating roller (33) and the limiting slide rod (322) are both hollow and connected. The connecting column (31) and the limiting slide rod (322) are connected by a duct hose (86). The duct hose (86) is located in the mounting groove (32). Multiple sets of the connecting columns (31) are interconnected. The inner cavity of the limiting slide rod (322) is connected to the exhaust groove (521).

5. A testing apparatus for a dishwasher according to claim 3, characterized in that, A bidirectional telescopic rod (54) is fixed on the outer wall of the piston chamber (5). The telescopic ends of the bidirectional telescopic rod (54) extend into the cavities of the piston chambers (5) on both sides, and pressure sensors are installed at the telescopic ends of the bidirectional telescopic rod (54). When the telescopic end of the bidirectional telescopic rod (54) is inserted into the piston chamber (5), the piston plate (51) is limited above it, and when the dishwasher enters the test chamber (1), under its gravity, the rotating roller (3) and the vibrating roller (33) are in a flush state.

6. A testing apparatus for a dishwasher according to claim 1, characterized in that, The test box (1) is equipped with a water injection pipe (9) on the top, a water flow meter (91) is installed on the water injection pipe (9), and a sealing cover (92) is installed on the top of the test box (1).

7. A testing apparatus for a dishwasher according to claim 1, characterized in that, Both sides of the test box (1) are fixedly connected with sealing telescopic rods (2), and a sealing plate (21) is inserted into the top of the front end of the test box (1). The telescopic top end of the sealing telescopic rod (2) is fixedly connected to the top of the sealing plate (21).

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