Air tightness testing device for dust collector

Abstract

The utility model provides an air tightness testing device for a dust collector, and belongs to the technical field of sealing testing. The air tightness testing device comprises a fixed support used for supporting a dust collector to be tested; the front sealing module is provided with a sealing sleeve controllably moving along a first direction, and the sealing sleeve is used for moving to a preset position and forming sealing connection with a connecting pipe at the front end of the to-be-tested dust collector; the side face sealing module is provided with two profiling sealing blocks which can be close to and far away from each other, and the two profiling sealing blocks are used for sealing two side air outlets in the side face of the to-be-tested dust collector respectively; the high-low pressure switching module is used for controllably providing air flows with different pressures; the sealing cover is connected with the air outlet end of the high-low pressure switching module, and the sealing cover is further connected with the rear end of the dust collector to be tested so as to be communicated with an airflow channel in the dust collector to be tested. The air tightness testing device can effectively improve the testing efficiency.

Description

TECHNICAL FIELD

[0001] The utility model relates to a sealed test technical field especially relates to a dust catcher is with air tightness testing device. BACKGROUND

[0002] The dust catcher is the device that produces airflow through cyclone assembly, carries out dust absorption work. The sealing of the internal air path of the dust catcher plays a particularly key role for cleaning efficiency, if the sealing is poor, the leakage of the inhaled air can cause the insufficient suction of the dust catcher and reduce the cleaning efficiency.

[0003] In the prior art, the internal air path of the dust catcher is generally sealed and a pressure difference is established, the pressure change in the dust catcher is monitored through the pressure gauge, if the air pressure does not obviously decrease within a certain time, it indicates that the air tightness of the dust catcher is good. Generally, the air vent to be sealed is manually sealed by using a sealing member, then a manual connection detection device is left out for sealing detection. This method needs to be manually sealed, so the efficiency is low. UTILITY MODEL CONTENTS

[0004] An object of the utility model is to provide a dust catcher air tightness testing device, which can effectively improve the test efficiency.

[0005] A further object of the utility model is to improve the sealing performance during testing.

[0006] Another object of the utility model is to ensure that the sealing test is carried out efficiently and accurately.

[0007] In particular, the embodiment of the application provides a dust catcher air tightness testing device, which comprises:

[0008] The fixed support is used for supporting the dust catcher to be tested;

[0009] The front sealing module has a sealing sleeve that can be controlled to move along the first direction, and the sealing sleeve is used to move to the preset position and form a sealing connection with the connecting pipe at the front end of the dust catcher to be tested;

[0010] The side sealing module has two profiled sealing blocks that can approach and move away from each other, and the two profiled sealing blocks are respectively used to seal two side air outlets on the side of the dust catcher to be tested;

[0011] The high-low pressure switching module comprises an airflow that can be controlled to provide different pressures;

[0012] The sealing cover is connected with the air outlet end of the high-low pressure switching module, and the sealing cover is also connected with the rear end of the dust catcher to be tested, so as to communicate with the airflow channel inside the dust catcher to be tested.

[0013] Optionally, the front sealing module further includes:

[0014] A first driving mechanism is used to drive the sealing sleeve to reciprocate along a second direction toward the side air outlet;

[0015] A pressure sensor is disposed between the output end of the first drive mechanism and the sealing sleeve, for detecting the pressure of the sealing sleeve along the first direction.

[0016] Optionally, the side sealing module further includes:

[0017] Two second drive mechanisms are provided, with the output end of each second drive mechanism connected to each of the contour sealing blocks, for driving the contour sealing blocks to reciprocate along the second direction.

[0018] A connecting bracket is used to connect the two second drive mechanisms;

[0019] The third drive mechanism is connected to the connecting bracket and is used to drive the connecting bracket to reciprocate in the vertical direction.

[0020] Optionally, the outputs of the two second drive mechanisms move synchronously.

[0021] Optionally, both second drive mechanisms are cylinders and share a common intake manifold.

[0022] Optionally, each of the second drive mechanisms is further provided with a plane adjustment mechanism between itself and its corresponding contoured sealing block, for adjusting the flatness of the contoured sealing block before testing.

[0023] Optionally, the high-low pressure switching module includes a gas source filter, a pressure control unit, and a gas flow meter connected in sequence. The flow meter is used to measure gas leakage. The pressure control unit includes a high-pressure branch and a low-pressure branch connected in parallel. The high-pressure branch is equipped with a first flow controller and a first gas switching valve. The low-pressure branch is equipped with a second flow controller and a second gas switching valve. The high-pressure branch and the low-pressure branch can be selectively opened.

[0024] Optionally, the hardness of the conformal sealing block is any value between 18HA and 22HA.

[0025] Optionally, the sealing cap is connected to the connection portion at the rear end of the vacuum cleaner after the filter module is removed.

[0026] According to one aspect of this application, an apparatus is provided for performing airtightness testing on an assembled vacuum cleaner product. The apparatus includes a sealing sleeve for sealing the connecting pipe at the front end of the vacuum cleaner under test, and a contoured sealing block for sealing the side air outlet of the vacuum cleaner. A sealing cap is then connected to the rear end of the vacuum cleaner, and the sealing cap is further connected to a high-low pressure switching module. By controlling the high-low pressure switching module to introduce airflows of different pressures, the vacuum cleaner can be tested for airtightness under different pressures. This apparatus enables automated high-low pressure airtightness testing of the entire vacuum cleaner, saving labor and improving testing efficiency.

[0027] Furthermore, the two drive mechanisms operate synchronously, which not only improves testing efficiency but also ensures that pressure is applied synchronously to both sides of the vacuum cleaner under test, preventing the vacuum cleaner from being deflected due to unbalanced forces.

[0028] Furthermore, setting the hardness of the conformal sealing block to any value between 18HA and 22HA can ensure that the sealing dimensions meet the requirements while having good wrapping properties, thereby improving the sealing performance.

[0029] Furthermore, a planar adjustment mechanism is provided for adjusting the flatness of the contour sealing block. Therefore, the surface fit can be adjusted according to the current vacuum cleaner under test before testing to ensure the sealing of the side air outlet of the vacuum cleaner during the test and improve the test accuracy. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the airtightness testing device for a vacuum cleaner according to an embodiment of the present invention;

[0031] Figure 2 According to Figure 1 A schematic diagram of the airtightness testing device for a vacuum cleaner in the test state according to the embodiment;

[0032] Figure 3 This is a partial exploded view of the vacuum cleaner under test;

[0033] Figure 4 This is a schematic diagram of the side sealing module of an airtightness testing device for a vacuum cleaner according to an embodiment of the present invention;

[0034] Figure label:

[0035] 100-Air tightness testing device for vacuum cleaners, 10-Fixed bracket, 20-Front sealing module, 21-Sealing sleeve, 22-First drive mechanism, 23-Pressure sensor, 24-First bracket, 30-Side sealing module, 31-Contouring sealing block, 311-Arc surface, 312-Sealing strip, 32-Second drive mechanism, 33-Connecting bracket, 34-Third drive mechanism, 35-Second bracket, 36-Adjustment mechanism, 361-Adjustment Panel, 362-Fasteners, 40-High / Low Pressure Switching Module, 41-Air Source Filter, 44-Gas Flow Meter, 42-High Pressure Branch, 421-First Flow Controller, 422-First Gas Switch Valve, 43-Low Pressure Branch, 431-Second Flow Controller, 432-Second Gas Switch Valve, 50-Sealing Cover, 200-Vacuum Cleaner Under Test, 210-Connecting Pipe, 220-Side Air Outlet, 230-Filter Module, 240-Connecting Part. Detailed Implementation

[0036] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, it should be noted that, for ease of description, only the parts relevant to this application are shown in the accompanying drawings, not the entire structure. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0037] The terms “comprising” and “having”, and any variations thereof, used in this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such process, method, product, or apparatus.

[0038] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0039] Figure 1 This is a schematic diagram of the structure of an airtightness testing device 100 for a vacuum cleaner according to an embodiment of the present invention. Figure 2 According to Figure 1 A schematic diagram of the structure of the vacuum cleaner air tightness testing device 100 in the testing state according to the embodiment.Figure 3 This is a partial exploded view of the vacuum cleaner 200 under test. Figure 3 As shown, the vacuum cleaner tested by the testing device in this embodiment has a connecting pipe 210 at its front end. This connecting pipe 210 can be connected to vacuum hoses of different shapes to meet the vacuuming needs of different scenarios. The vacuum cleaner can also be used without connecting a vacuum hose. Side air outlets 220 are arranged opposite each other on the outer peripheral surface of the vacuum cleaner. An internal air passage is formed inside the vacuum cleaner, connecting the connecting pipe 210 and the side air outlet 220. During normal operation, airflow enters the vacuum cleaner from the connecting pipe 210 and flows out from the side air outlet 220. A filter assembly is detachably connected to the rear end of the vacuum cleaner. When the filter assembly is removed, the internal air passage of the vacuum cleaner is exposed, that is, the internal air passage forms a connection between the connecting pipe 210, the side air outlet 220, and the rear end.

[0040] like Figure 1As shown, in one embodiment, the vacuum cleaner airtightness testing device 100 includes a fixed bracket 10, a front sealing module 20, a side sealing module 30, a high / low pressure switching module 40, and a sealing cover 50. The fixed bracket 10 is used to support the vacuum cleaner 200 under test. For example, the fixed bracket 10 is fixedly set on the test platform. The fixed bracket 10 is used to support and fix the bottom of the vacuum cleaner 200 under test. The fixed bracket 10 can be an integral structure adapted to the shape of the bottom of the vacuum cleaner 200 under test, or it can be a split structure that supports different parts of the bottom surface of the vacuum cleaner 200 under test. Of course, the fixed bracket 10 can also be used to suspend the vacuum cleaner 200 under test. As long as the vacuum cleaner 200 under test can be effectively positioned to ensure that it does not shift during the test, the form of the fixed bracket 10 is not limited here. The front sealing module 20 has a sealing sleeve 21 that can be controllably moved along a first direction. The sealing sleeve 21 is used to move to a preset position and form a sealed connection with the connecting pipe 210 at the front end of the vacuum cleaner under test 200. The side sealing module 30 has two contoured sealing blocks 31 that can move closer to or further away from each other. The two contoured sealing blocks 31 are used to seal the two side air outlets 220 on the side of the vacuum cleaner under test 200, respectively. The high-low pressure switching module 40 includes airflow for controllably providing different pressures, for example, forming multiple branches with different pressures according to test requirements, and testing is performed sequentially at each pressure. The sealing cover 50 is connected to the air outlet end of the high-low pressure switching module 40, and the sealing cover 50 is also connected to the rear end of the vacuum cleaner under test 200 to communicate with the airflow channel inside the vacuum cleaner under test 200. In one embodiment, the sealing cap 50 is connected to the connecting portion 240 at the rear end of the vacuum cleaner after the filter module 230 has been removed. That is, the filter module 230 is connected to the connecting portion 240 at the vacuum cleaner body. The connecting portion 240 can be a threaded portion, a snap-fit ​​portion, or a combination of both. This is a common connection method between the filter module 230 and the vacuum cleaner body, and is not limited here. During testing, the filter module 230 is unscrewed and removed. The sealing cap 50 has a snap-fit ​​that fits the connecting portion 240 at the rear end of the vacuum cleaner body, allowing it to be installed at the rear end of the vacuum cleaner body and forming a passage with the internal air passage of the vacuum cleaner. Of course, in other embodiments not shown, the sealing cap 50 can also be in other forms, such as a silicone sealant fitted onto the rear end of the vacuum cleaner body for sealing, and is not limited here.

[0041] This embodiment provides a device for performing airtightness testing on an assembled vacuum cleaner product. The device includes a sealing sleeve 21 for sealing the connecting pipe 210 at the front end of the vacuum cleaner 200 under test, and a contoured sealing block 31 for sealing the side air outlet 220 of the vacuum cleaner 200. A sealing cover 50 is then connected to the rear end of the vacuum cleaner, and the sealing cover 50 is further connected to a high / low pressure switching module 40. By controlling the airflow at different pressures through the high / low pressure switching module 40, the vacuum cleaner can be tested for airtightness under different pressures. This device enables automated high / low pressure airtightness testing of the entire vacuum cleaner, saving labor and improving testing efficiency.

[0042] In one embodiment, such as Figure 1 As shown, the front sealing module 20 also includes a first drive mechanism 22 and a pressure sensor 23. The first drive mechanism 22 is used to drive the sealing sleeve 21 to reciprocate along a second direction toward the side air outlet 220. The first drive mechanism 22 can be a commonly used drive component for outputting linear displacement, such as a linear motor or cylinder, and is not limited here. The pressure sensor 23 is disposed between the output end of the first drive mechanism 22 and the sealing sleeve 21, and is used to detect the pressure of the sealing sleeve 21 along the first direction. When the pressure reaches a preset pressure threshold, it indicates that the stroke of the first drive mechanism 22 has exceeded the safe range. At this time, the first drive mechanism 22 can be controlled to stop to avoid damage to the connecting pipe 210. Further, the first drive mechanism 22 can be fixed at the first bracket 24. The first bracket 24 is used to support the first drive mechanism 22, the pressure sensor 23, and the sealing sleeve 21. The height of the first bracket 24 is set so that the sealing sleeve 21 is aligned with the connecting pipe 210, so that the sealing sleeve 21 and the connecting pipe 210 can be automatically docked by moving only along the first direction.

[0043] In a further embodiment, a guide component may be provided between the first drive mechanism 22 and the sealing sleeve 21 to ensure the consistency of the displacement of the first drive mechanism 22 and the sealing sleeve 21.

[0044] Figure 4 This is a schematic diagram of the side sealing module 30 of a vacuum cleaner airtightness testing device 100 according to an embodiment of the present invention. Figure 4As shown, in one embodiment, the side sealing module 30 further includes two second drive mechanisms 32, a connecting bracket 33, and a third drive mechanism 34. The output end of each second drive mechanism 32 is connected to each contoured sealing block 31, driving the contoured sealing block 31 to reciprocate along a second direction. The second drive mechanism 32 can be a cylinder, hydraulic cylinder, or other components, without limitation. The connecting bracket 33 connects the two second drive mechanisms 32. The third drive mechanism 34 is connected to the connecting bracket 33, driving the connecting bracket 33 to reciprocate along a vertical direction. The third drive mechanism 34 can be fixed by a second bracket 35. The third drive mechanism 34 can be a motor, cylinder, hydraulic cylinder, or other components, without limitation. In a further embodiment, the output ends of the two second drive mechanisms 32 move synchronously. For example, both second drive mechanisms 32 are cylinders and share a common air intake manifold, allowing both second drive mechanisms 32 to operate simultaneously.

[0045] In this embodiment, the two drive mechanisms operate synchronously, which improves testing efficiency and ensures that pressure is applied synchronously on both sides of the vacuum cleaner under test 200, thus preventing the vacuum cleaner under test 200 from being deflected due to unbalanced forces.

[0046] Furthermore, such as Figure 4 As shown, the contoured sealing block 31 includes an arc surface 311 that matches the outer peripheral surface of the vacuum cleaner. A raised sealing strip 312 is provided on the arc surface 311, and the sealing strip 312 matches the shape of the side air outlet 220. At least the portion of the contoured sealing block 31 that contacts the vacuum cleaner can be made of plastic to improve sealing compatibility. In one embodiment, the hardness of the contoured sealing block 31 is any value between 18HA and 22HA, for example, 18HA, 20HA, 21HA, or 22HA, without limitation. The contoured sealing block 31 can be injection molded from a mixture of AB materials. When the hardness of the contoured sealing block 31 is within the above range, it will not reduce the wrapping effect due to excessive hardness, nor will it deform after manufacturing and drying due to insufficient hardness, thus failing to meet the sealing size requirements.

[0047] In this embodiment, the hardness of the conformal sealing block 31 is set to any value between 18HA and 22HA, which can ensure that the sealing size meets the requirements while having good wrapping properties, thereby improving the sealing performance.

[0048] Furthermore, such as Figure 4As shown, a plane adjustment mechanism 36 is also provided between each second drive mechanism 32 and its corresponding contour sealing block 31, for adjusting the flatness of the contour sealing block 31 before testing. Specifically, an adjustment panel 361 is also provided between the contour sealing block 31 and the second drive mechanism 32. Multiple fasteners 362 pass through the mounting holes on the adjustment panel 361 and are connected to the contour sealing block 31. For example, fasteners 362 are set at the four corners of the adjustment panel 361. By turning the fasteners 362 at different positions, the relative posture between the contour sealing block 31 and the adjustment panel 361 can be adjusted. Before formal testing, the fasteners 362 need to be adjusted according to the product to ensure that the contour sealing block 31 fits tightly with the side air outlet 220.

[0049] This embodiment also includes a plane adjustment mechanism 36 for adjusting the flatness of the contour sealing block 31. Therefore, the surface fit can be adjusted according to the current vacuum cleaner 200 under test before testing to ensure the sealing of the side air outlet 220 of the vacuum cleaner during the test and improve the test accuracy.

[0050] like Figure 2 As shown, in one embodiment, the high-low pressure switching module 40 includes a gas source filter 41, a pressure control unit, and a gas flow meter 44 connected in sequence. The flow meter is used to measure the amount of gas leakage. The pressure control unit includes a high-pressure branch 42 and a low-pressure branch 43 connected in parallel. The high-pressure branch 42 is equipped with a first flow controller 421 and a first gas switching valve 422. The low-pressure branch 43 is equipped with a second flow controller 431 and a second gas switching valve 432. The high-pressure branch 42 and the low-pressure branch 43 can be selectively opened.

[0051] During the test, the vacuum cleaner under test 200 is first fixed to the fixed bracket 10, and then the sealing cover 50 is assembled to the rear end of the vacuum cleaner under test 200.

[0052] Then, the third drive mechanism 34 of the side sealing module 30 is activated, causing the contour sealing block 31 to descend into place. Then, the two second drive mechanisms 32 are activated simultaneously to drive the contour sealing blocks 31 to move closer to each other, so that the contour sealing blocks 31 are in close contact with the side air outlet 220.

[0053] Next, the first drive mechanism 22 of the front sealing assembly is started, causing the sealing sleeve 21 to move to the position where it is fitted with the connecting pipe 210. During this process, if the pressure sensor 23 detects pressure overload, it controls the first drive mechanism 22 to stop, thereby protecting the connecting pipe 210.

[0054] Finally, the high-low pressure switching module 40 is activated. For example, the first gas switch valve 422 is closed, the second gas switch valve 432 is opened, and the low-pressure branch 43 is activated. The pressure in the low-pressure branch 43 is controlled by the first flow controller 421 to make the pressure in the low-pressure branch 43 reach the first pressure threshold. Then, the leakage is collected by the gas flow meter 44 in the low-pressure state. The principle of high-pressure detection is the same as that of low-pressure detection, the only difference being that the high-pressure branch 42 needs to reach the second pressure threshold. In one embodiment, the first pressure threshold is 0.35 kPa, the second pressure threshold is 27 kPa, and the leakage in the low-pressure state exceeding 0.6 L / min is considered a failure of the low-pressure airtightness test, and the leakage in the high-pressure state exceeding 5 L / min is considered a failure of the high-pressure airtightness test.

[0055] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An airtightness testing device for a vacuum cleaner, characterized in that, include: A mounting bracket is used to support the vacuum cleaner under test. The front sealing module has a sealing sleeve that can be controllably moved along a first direction. The sealing sleeve is used to move to a preset position and form a sealed connection with the connecting pipe at the front end of the vacuum cleaner under test. The side sealing module has two contoured sealing blocks that can move closer to or further away from each other, and the two contoured sealing blocks are respectively used to seal the two side air outlets on the side of the vacuum cleaner under test; High-low pressure switching module, including airflow for controllably providing different pressures; The sealing cap is connected to the air outlet of the high-low pressure switching module, and the sealing cap is also connected to the rear end of the vacuum cleaner under test so as to communicate with the airflow channel inside the vacuum cleaner under test.

2. The airtightness testing device for a vacuum cleaner according to claim 1, characterized in that, The front sealing module also includes: A first driving mechanism is used to drive the sealing sleeve to reciprocate along a second direction toward the side air outlet; A pressure sensor is disposed between the output end of the first drive mechanism and the sealing sleeve, for detecting the pressure of the sealing sleeve along the first direction.

3. The airtightness testing device for a vacuum cleaner according to claim 1, characterized in that, The side sealing module also includes: Two second drive mechanisms are provided, with the output end of each second drive mechanism connected to each of the contour sealing blocks, for driving the contour sealing blocks to reciprocate along the second direction. A connecting bracket is used to connect the two second drive mechanisms; The third drive mechanism is connected to the connecting bracket and is used to drive the connecting bracket to reciprocate in the vertical direction.

4. The airtightness testing device for a vacuum cleaner according to claim 3, characterized in that, The output ends of the two second drive mechanisms move synchronously.

5. The airtightness testing device for a vacuum cleaner according to claim 4, characterized in that, Both of the second drive mechanisms are cylinders and share a common intake manifold.

6. The airtightness testing device for a vacuum cleaner according to any one of claims 3-5, characterized in that, Each of the second drive mechanisms is further provided with a plane adjustment mechanism between itself and its corresponding contoured sealing block, for adjusting the flatness of the contoured sealing block before testing.

7. The airtightness testing device for a vacuum cleaner according to claim 1, characterized in that, The high-low pressure switching module includes a gas source filter, a pressure control unit, and a gas flow meter connected in sequence. The flow meter is used to measure the gas leakage. The pressure control unit includes a high-pressure branch and a low-pressure branch connected in parallel. The high-pressure branch is equipped with a first flow controller and a first gas switching valve. The low-pressure branch is equipped with a second flow controller and a second gas switching valve. The high-pressure branch and the low-pressure branch can be selectively opened.

8. The airtightness testing device for a vacuum cleaner according to claim 1, characterized in that, The hardness of the conformal sealing block is any value between 18HA and 22HA.

9. The airtightness testing device for a vacuum cleaner according to claim 1, characterized in that, The sealing cap is connected to the rear end of the vacuum cleaner after the filter module is removed.

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