Air tightness detection equipment and air tightness detection method for filter element

Abstract

The invention relates to the technical field of water purification equipment, in particular to air tightness detection equipment and an air tightness detection method for a filter element, and aims to solve the problem of low air tightness detection efficiency of the filter element caused by long time consumption and large manpower consumption of the existing air tightness detection of the filter element. The air tightness detection equipment comprises a detection table, a detection pool and a detection device, the detection device comprises a tool assembly, a detection assembly and a driving mechanism, the tool assembly is used for loading a to-be-detected filter element, and the detection assembly is arranged to be capable of inflating a cavity to detect the air tightness of a shell of the to-be-detected filter element. The detection assembly is further arranged to be capable of detecting whether the interior of the to-be-detected filter element is bypassed or not. According to the invention, not only can the air tightness of the shell of the filter element be detected, but also whether the interior of the filter element is bypassed can be detected, the detection efficiency and the detection convenience are greatly improved, and the filter element can be automatically immersed into the detection pool through the driving mechanism, so that the manual operation is reduced, the manpower is saved, and the air tightness detection efficiency of the filter element is improved.

Description

Technical Field

[0001] The invention relates to the technical field of water purification equipment, and specifically provides an air tightness detection device and an air tightness detection method for a filter element. Background Art

[0002] As people's living standards improve, their demand for drinking water is also increasing. Water purifiers, pipeline machines and other drinking water purification equipment have gradually become essential drinking water facilities in people's daily lives.

[0003] There is a filter element installed inside the drinking water purification equipment. After the filter element is produced, in order to ensure the quality of the filter element, the filter element needs to be tested for air tightness to ensure that the filter element is qualified, thereby preventing unqualified filter elements from entering the market.

[0004] In the prior art, when performing air tightness testing on a filter element, it is usually necessary to manually hold the filter element knob into the tooling and manually ventilate the tooling, and then press the tooling and the filter element into the water, and manually control the air valve to test the air tightness and bypass of the filter element housing. This testing method can easily make people tired, the testing time of a single filter element is long, and a lot of manpower is consumed, resulting in low detection efficiency of the filter element. Summary of the invention

[0005] The present invention aims to solve the above technical problem, that is, to solve the problem that the existing air tightness detection of the filter element is time-consuming and labor-intensive, resulting in low efficiency of the air tightness detection of the filter element.

[0006] In a first aspect, the present invention provides an air tightness testing device for a filter element, the air tightness testing device comprising a testing platform and a testing pool and a testing device arranged on the testing platform, the testing device comprising a tooling assembly, a testing assembly and a driving mechanism, the tooling assembly is adapted to the filter element to be tested and is used to load the filter element to be tested, the driving mechanism can drive the tooling assembly to move so as to immerse the filter element to be tested into the testing pool, the filter element to be tested comprises an outer shell and a filter assembly arranged in the outer shell, a cavity is formed between the outer shell and the filter assembly, the filter assembly has at least a first channel and a second channel which are not connected to each other, the inlet end of the first channel is connected to the cavity, the testing assembly is arranged to be able to inflate the cavity so as to detect the air tightness of the outer shell of the filter element to be tested, and the testing assembly is also arranged to be able to detect whether the first channel and / or the cavity are connected to the second channel so as to detect whether the interior of the filter element to be tested is bypassed.

[0007] In the preferred technical scheme of the air tightness detection equipment for the filter element, the filter element to be detected is an RO membrane filter element, the outer shell is provided with a raw water inlet, a waste water outlet and a pure water outlet, the raw water inlet is connected with the cavity, the first channel is a raw water channel, the second channel is a pure water channel, the tooling assembly is an RO tooling adapted to the RO membrane filter element, the RO tooling is provided with an air inlet adapted to the raw water inlet, a first connection port adapted to the pure water outlet and a second connection port adapted to the waste water outlet, the RO tooling can block the second connection port; the detection assembly includes an air supply component and a detection component, the air supply component is connected to the air inlet and is used to inflate the cavity, the detection component is connected to the first connection port, and the detection component is configured to block the first connection port when it is in a first detection state and to open the first connection port when it is in a second detection state to detect the gas flow flowing out of the first connection port.

[0008] In the preferred technical solution of the air tightness detection device for the filter element, the filter element to be detected is a PCB filter element, the shell is provided with a first water inlet, a first water outlet, a second water inlet and a second water outlet, the first water inlet is connected to the cavity, the first channel is a raw water treatment channel, the second channel is a pure water treatment channel, the water inlet end of the raw water treatment channel is connected to the cavity, the water outlet end of the raw water treatment channel is connected to the first water outlet, the water inlet end of the pure water treatment channel is connected to the second water inlet, the water outlet end of the pure water treatment channel is connected to the second water outlet, the tooling assembly is a PCB tooling adapted to the PCB filter element, and the PC The B tooling is provided with an air inlet adapted to the first water inlet, a first connection port adapted to the first water outlet, a second connection port adapted to the second water inlet and a third connection port adapted to the second water outlet, and the PCB tooling can block the second connection port; the detection component includes an air supply component and a detection component, the air supply component is connected to the air inlet and is used to inflate air into the cavity, the detection component is connected to the first connection port, the detection component is configured to detect the gas flow flowing out of the first water outlet when it is in a first detection state, and the detection component is configured to block the first water outlet when it is in a second detection state.

[0009] In the preferred technical solution of the above-mentioned air tightness detection equipment for filter elements, the air supply component includes an air storage tank, an air supply pipe and an air supply valve, one end of the air supply pipe is connected to the air storage tank, and the other end of the air supply pipe is connected to the air inlet, and the air supply valve is arranged on the air supply pipe and is used to control the on-off of the air supply pipe; and / or, the detection component includes an air outlet pipe and a flow meter and a control valve arranged on the air outlet pipe, the flow meter is used to detect the gas flow in the air outlet pipe, and the control valve is used to control the on-off of the air outlet pipe.

[0010] In the preferred technical solution of the above-mentioned air tightness detection device for the filter element, the detection component also includes a filter element arranged on the air outlet pipe, and the filter element is arranged at the upstream end of the flow meter; or, the detection component also includes a filter element arranged on the air outlet pipe, a drain pipe connected to the filter element, and a drain valve arranged on the drain pipe.

[0011] In the preferred technical solution of the above-mentioned air tightness testing device for filter elements, the tooling assembly includes a base plate and a clamping member and a driving member arranged on the base plate, the driving member is used to drive the clamping member to move so as to clamp the filter element to be tested between the clamping members; and / or, the driving mechanism includes a supporting plate and a driving assembly, and when installed, the tooling assembly is located on the supporting plate, and the driving assembly is used to drive the supporting plate to move so as to immerse the filter element to be tested into the testing pool; and / or, a plurality of testing stations are arranged on the testing table, and the number of the testing devices is multiple and is arranged one-to-one with the testing stations, so as to simultaneously perform air tightness testing on a plurality of filter elements to be tested.

[0012] In a second aspect, the present invention provides an air tightness detection method for a filter element, wherein the air tightness detection device described in any one of the above items is used to detect the air tightness of the filter element, and the detection method comprises the following steps: detecting the air tightness of the outer shell of the filter element to determine whether the air tightness of the outer shell of the filter element is good; and determining whether the filter element is qualified based on the judgment result.

[0013] In the preferred technical solution of the above-mentioned air tightness detection method for the filter element, the step of "determining whether the filter element is qualified according to the judgment result" specifically includes: if the judgment result is "no", the filter element is unqualified.

[0014] In the preferred technical solution of the above-mentioned air tightness detection method for the filter element, the step of "determining whether the filter element is qualified based on the judgment result" specifically includes: if the judgment result is "yes", further detecting the bypass air tightness of the filter element to determine whether the filter element is bypassed; and determining whether the filter element is qualified based on the judgment result.

[0015] In the preferred technical solution of the above-mentioned air tightness detection method for the filter element, the step of "determining whether the filter element is qualified based on the judgment result" specifically includes: if the judgment result is "yes", the filter element is unqualified; and / or, if the judgment result is "no", the filter element is qualified.

[0016] When adopting the above-mentioned preferred technical solution, by setting up the tooling assembly and the detection assembly, not only the air tightness of the filter element outer shell can be detected, but also whether the interior of the filter element is bypassed can be detected, which greatly improves the detection efficiency and detection convenience of the air tightness detection equipment, and by setting up the driving assembly, the tooling assembly can be driven to move and immerse the filter element in the detection tank, thereby reducing manual operation, saving manpower, and greatly improving the air tightness detection efficiency of the filter element.

[0017] Furthermore, by providing a RO tooling that is compatible with the RO membrane filter element and a PCB tooling that is compatible with the PCB filter element, the RO membrane filter element and the PCB filter element can be inspected, thereby improving the applicability of the detection equipment, and different types of filter elements to be inspected can be achieved simply by replacing the tooling components, thereby further improving the detection efficiency.

[0018] Furthermore, by configuring the detection component to include an air outlet pipe, a flow meter and a control valve, it is possible to detect the gas flow rate flowing out of the pure water outlet by configuring the flow meter, and to conveniently control the on-off state of the air outlet pipe by using the control valve, thereby blocking the pure water outlet, thereby enabling the detection component to be conveniently switched between the first detection state and the second detection state.

[0019] In addition, the present invention further provides a detection method for a filter element based on the above-mentioned technical solution. The method can determine whether the filter element is qualified by first detecting the air tightness of the filter element shell and judging whether the air tightness of the filter element shell is good. Therefore, when the air tightness of the filter element shell is not good, the filter element does not need to be tested for bypass air tightness, thereby avoiding the problem of low detection efficiency caused by further testing the bypass air tightness when the air tightness of the shell is not good, thereby further improving the detection efficiency of the filter element. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings, in which:

[0021] Figure 1 It is a structural schematic diagram of the air tightness detection device for the filter element of the present invention;

[0022] Figure 2 This is a schematic diagram of the connection structure of the RO membrane filter element, the tooling component, and the detection component of the present invention. Figure 1 , which shows a connection diagram of one embodiment;

[0023] Figure 3 This is a schematic diagram of the connection structure of the RO membrane filter element, the tooling component, and the detection component of the present invention. Figure 2 , which shows a connection diagram of another embodiment;

[0024] Figure 4 This is a schematic diagram of the connection structure between the PCB filter element and the tooling component and the detection component of the present invention. Figure 1 , which shows a connection diagram of one embodiment;

[0025] Figure 5 This is a schematic diagram of the connection structure between the PCB filter element and the tooling component and the detection component of the present invention. Figure 2 , which shows a connection diagram of another embodiment;

[0026] Figure 6 It is a structural schematic diagram of the tooling assembly of the present invention;

[0027] Figure 7 It is a flow chart of the air tightness detection method for the filter element of the present invention;

[0028] Figure 8 It is a flow chart of an embodiment of the air tightness detection method for a filter element of the present invention.

[0029] List of reference numerals:

[0030] 1. Test bench; 2. Test pool; 31. Tooling assembly; 301. Air inlet; 302. First connection port; 303. Second connection port; 304. Third connection port; 311. Bottom plate; 3121. First clamping plate; 3122. Second clamping plate; 313. Driving member; 314. Support member; 315. Handle; 4. Driving mechanism; 41. Loading plate; 42. Driving assembly; 511. Gas storage tank; 512. Gas supply pipe; 5 13. Air supply valve; 521. Air outlet pipe; 522. Flow meter; 523. Control valve; 524. Filter element; 525. Drain pipe; 526. Drain valve; 6. Filter element to be tested; 61. RO membrane filter element; 611. Raw water inlet; 612. Waste water outlet; 613. Pure water outlet; 62. PCB filter element; 621. First water inlet; 622. First water outlet; 623. Second water inlet; 624. Second water outlet. DETAILED DESCRIPTION

[0031] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0032] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer", "top", "bottom" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0033] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "setting" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] See also Figure 1 , Figure 1 It is a structural schematic diagram of the air tightness detection equipment of the present invention.

[0035] like Figure 1 As shown, the air tightness testing equipment of the present invention is used to test the air tightness of the filter element. The testing equipment of the present invention includes a testing platform 1 and a testing pool 2 and a testing device arranged on the testing platform 1. The testing device includes a tooling assembly 31, a testing assembly and a driving mechanism 4. The tooling assembly 31 is adapted to the filter element 6 to be tested and is used to load the filter element 6 to be tested. The driving mechanism 4 can drive the tooling assembly 31 to move so as to immerse the filter element 6 to be tested into the testing pool 2.

[0036] Among them, the filter element 6 to be tested includes an outer shell and a filter component arranged in the outer shell, a cavity is formed between the outer shell and the filter component, the filter component has at least a first channel and a second channel that are not connected to each other, the inlet end of the first channel is connected to the cavity, the detection component is configured to be able to inflate the cavity so as to detect the air tightness of the outer shell of the filter element 6 to be tested, and the detection component is also configured to be able to detect whether the first channel and / or the cavity is connected to the second channel so as to detect whether the interior of the filter element 6 to be tested is bypassed.

[0037] Through such a setting, that is, by setting a tooling assembly 31 that is compatible with the filter element 6 to be tested, the air tightness test of different types of filter elements can be achieved only by switching the tooling assembly 31. Not only can the air tightness of the outer shell of the filter element be tested, but also whether the interior of the filter element is bypassed can be tested, which greatly improves the detection efficiency and detection convenience of the air tightness detection equipment. Moreover, by setting the driving assembly 42, the tooling assembly 31 can be driven to move and immerse the filter element in the detection tank 2, thereby reducing manual operation, saving manpower, and greatly improving the air tightness detection efficiency of the filter element.

[0038] It should be noted that, in actual applications, those skilled in the art may set the liquid in the detection pool 2 to water, or may set the liquid in the detection pool 2 to an aqueous solution, etc. Such adjustments and changes to the specific type of liquid in the detection pool 2 do not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.

[0039] Preferably, the liquid in the detection pool 2 is water.

[0040] It should be noted that, in actual applications, those skilled in the art may configure the driving mechanism 4 to include a clamping assembly and a driving assembly 42, wherein the clamping assembly is used to clamp the tooling assembly 31, and the driving assembly 42 is used to drive the clamping assembly to move so as to immerse the filter element in the detection tank 2, or the driving mechanism 4 may be configured as a manipulator, which can grab the tooling assembly 31 and place it into the detection tank 2, or the driving mechanism 4 may be configured as a carrying plate 41 and a driving assembly 42, wherein the tooling assembly 31 loaded with the filter element 6 to be detected is placed on the carrying plate 41, and the driving assembly 42 drives the carrying plate 41 to move so as to allow the filter element 6 to be detected to enter the detection tank 2, and so on. Such adjustments and changes to the specific setting types of the driving mechanism 4 do not deviate from the principles and scope of the present invention, and should be included in the protection scope of the present invention.

[0041] Preferably, if Figure 1 As shown, the driving mechanism 4 includes a supporting plate 41 and a driving assembly 42 . When installed, the tooling assembly 31 is located on the supporting plate 41 , and the driving assembly 42 is used to drive the supporting plate 41 to move so as to immerse the filter element in the detection tank 2 .

[0042] It should be noted that, in actual applications, those skilled in the art may configure the drive component 42 as a cylinder module, or may configure the drive component 42 as a screw module, or may configure the drive component 42 as a robotic arm, etc. Such adjustments and changes to the specific setting types of the drive component 42 do not deviate from the principles and scope of the present invention, and should be included in the protection scope of the present invention.

[0043] Preferably, the driving assembly 42 is a cylinder module.

[0044] It should be noted that the present invention does not impose any limitation on the specific positional relationship between the first channel and the second channel, as long as the filter assembly includes at least two first channels and second channels that are not connected to each other. For example, the filter element 6 to be tested is an RO membrane filter element 61, the first channel is a raw water channel, and the second channel is a pure water channel, or the filter element 6 to be tested is a PCB filter element 62, the first channel is a raw water treatment channel, and the second channel is a pure water treatment channel.

[0045] Combine the following Figure 2 and Figure 4 The following two embodiments are used to introduce the specific embodiments of the air tightness detection device for the filter element of the present invention.

[0046] in, Figure 2 This is a schematic diagram of the connection structure of the RO membrane filter element, the tooling component, and the detection component of the present invention. Figure 1 , which shows a connection diagram of one embodiment; Figure 4 This is a schematic diagram of the connection structure between the PCB filter element and the tooling component and the detection component of the present invention. Figure 1 , which shows a connection diagram of one embodiment.

[0047] Embodiment 1:

[0048] like Figure 2 As shown, the filter element 6 to be tested is an RO membrane filter element 61, and a raw water inlet 611, a pure water outlet 613 and a waste water outlet 612 are provided on the outer shell of the RO membrane filter element 61. The raw water inlet 611 is connected to the cavity, the first channel is the raw water channel, and the second channel is the pure water channel.

[0049] Specifically, raw water enters the cavity from the raw water inlet 611 and then enters the raw water channel. Pure water filtered by the reverse osmosis membrane enters the pure water channel and flows out from the pure water outlet 613 . The generated wastewater flows out through the wastewater outlet 612 .

[0050] The tooling assembly 31 is an RO tooling that is compatible with the RO membrane filter element 61. The RO tooling is provided with an air inlet 301 that is compatible with the raw water inlet 611, a first connecting port 302 that is compatible with the pure water outlet 613, and a second connecting port 303 that is compatible with the waste water outlet 612. When installed, the raw water inlet 611 is connected to the air inlet 301, the pure water outlet 613 is connected to the first connecting port 302, and the waste water outlet 612 is connected to the second connecting port 303. The tooling assembly 31 can block the second connecting port 303.

[0051] The detection component includes an air supply component and a detection component. The air supply component is connected to the air inlet 301 and is used to inflate the cavity. The detection component is connected to the first connecting port 302. The detection component is configured to block the pure water outlet 613 when it is in a first detection state and to detect the gas flow flowing out of the pure water outlet 613 when it is in a second detection state.

[0052] When testing the air tightness of the outer shell of the RO membrane filter element 61, the tooling assembly 31 blocks the wastewater outlet 612, the detection component blocks the pure water outlet 613, and the air supply component inflates the cavity. The gas entering the filter element cannot flow out from the pure water outlet 613 and the wastewater outlet 612. At this time, the RO membrane filter element 61 is immersed in the detection tank 2. If bubbles can be detected around the outer shell of the RO membrane filter element 61, it means that the air tightness of the outer shell of the filter element is not good. If no bubbles emerge around the outer shell of the RO membrane filter element 61, it means that the air tightness of the outer shell of the filter element is good.

[0053] When detecting whether the RO membrane filter element 61 is bypassed, the tooling assembly 31 blocks the waste water outlet 612, the air supply component inflates the cavity, and the detection component detects the gas flow rate flowing out of the pure water outlet 613. If the gas flow rate exceeds the first preset flow rate, it means that the RO membrane filter element 61 is bypassed internally, that is, there is a problem of water cross-talk. If the gas flow rate is within the first preset flow rate range, the RO membrane filter element 61 is not bypassed internally, that is, there is no problem of water cross-talk between raw water and pure water.

[0054] Embodiment 2:

[0055] like Figure 4 As shown, the filter element 6 to be tested is a PCB filter element 62, and a first water inlet 621, a first water outlet 622, a second water inlet 623 and a second water outlet 624 are provided on the outer shell, the first water inlet 621 is connected to the cavity, the first channel is a raw water treatment channel, and the second channel is a pure water treatment channel. The water inlet end of the raw water treatment channel is connected to the cavity, the water outlet end of the raw water treatment channel is connected to the first water outlet 622, the water inlet end of the pure water treatment channel is connected to the second water inlet 623, and the water outlet end of the pure water treatment channel is connected to the second water outlet 624.

[0056] Specifically, raw water enters the cavity from the first water inlet 621 and then flows into the raw water treatment channel to achieve preliminary filtration of the raw water. The filtered water flows out through the first water outlet 622 .

[0057] The purified pure water flows into the pure water processing channel from the second water inlet 623 to improve the taste of the pure water, and then flows out from the second water outlet 624 .

[0058] The tooling assembly 31 is a PCB tooling adapted to the PCB filter element 62, and is provided with an air inlet 301 connected to the first water inlet 621, a first connection port 302 connected to the first water outlet 622, a second connection port 303 connected to the second water inlet 623, and a third connection port 304 connected to the second water outlet 624. The tooling assembly 31 can block the second connection port 303.

[0059] The detection component includes an air supply component and a detection component. The air supply component is connected to the air inlet 301 and is used to inflate the cavity. The detection component is connected to the first connecting port 302. The detection component is configured to detect the gas flow flowing out of the first water outlet 622 when it is in the first detection state. The detection component is configured to block the first water outlet 622 when it is in the second detection state.

[0060] When testing the air tightness of the outer shell of the PCB filter element 62, the tooling assembly 31 blocks the second water inlet 623, the air supply component inflates the cavity, and the detection component detects the gas flow rate flowing out of the first water outlet 622. If the gas flow rate reaches the second preset flow rate, it means that the first processing channel is not blocked, and then the detection component blocks the first water outlet 622. At this time, the PCB filter element 62 is immersed in the detection pool 2. If bubbles are detected around the outer shell of the PCB filter element 62, it means that the air tightness of the outer shell of the filter element is not good. If no bubbles are detected around the outer shell of the PCB filter element 62, it means that the air tightness of the outer shell of the filter element is good.

[0061] When detecting whether the PCB filter element 62 is bypassed, the tooling assembly 31 blocks the second water inlet 623, so that the detection component blocks the first water outlet 622, and the air supply component inflates the cavity. At this time, the PCB filter element 62 is immersed in the detection pool 2. If bubbles are detected at the second water outlet 624 of the PCB filter element 62, it means that the first channel is connected to the second channel, which means that the PCB filter element 62 is bypassed. If no bubbles are detected at the second water outlet 624 of the PCB filter element 62, it means that the first channel and the second channel are not connected, which means that the PCB filter element 62 is not bypassed.

[0062] It should be noted that although the present invention introduces the air tightness detection equipment of the present invention by taking the RO membrane filter element 61 and the PCB filter element 62 as examples, this is not restrictive. The air tightness detection equipment of the present invention is also applicable to air tightness detection of other types of filter elements, and so on. Such adjustments and changes to the applicable filter element types do not deviate from the principle and scope of the present invention and should be included in the protection scope of the present invention.

[0063] It should also be noted that, in practical applications, the present invention does not impose any limitation on the specific type of the air supply component, as long as it can inflate air into the cavity through the air inlet 301 .

[0064] In a specific embodiment, the air supply component includes an air storage tank 511, an air supply pipe 512 and an air supply valve 513, wherein one end of the air supply pipe 512 is connected to the air storage tank 511, and the other end of the air supply pipe 512 is connected to the air inlet 301, and the air supply valve 513 is arranged on the air supply pipe 512 and is used to control the on and off of the air supply pipe 512.

[0065] In another specific embodiment, the gas supply component includes a gas generator and a gas supply pipe 512, wherein one end of the gas supply pipe 512 is connected to the gas inlet 301, and the other end of the gas supply pipe 512 is connected to the gas generator so that the gas generated by the gas generator can be transported to the gas inlet 301 through the gas supply pipe 512.

[0066] Although both of the above-mentioned two embodiments can supply air into the filter element through the air inlet 301, compared with setting the air supply component in the form of a gas generator and an air supply pipe 512, setting the air supply component in the form of a gas storage tank 511, an air supply pipe 512 and an air supply valve 513 can improve the safety and stability of the air supply and further improve the detection efficiency of the filter element.

[0067] Preferably, if Figure 2 and Figure 4 As shown, the air supply component includes an air storage tank 511, an air supply pipe 512 and an air supply valve 513 arranged on the air supply pipe 512, wherein one end of the air supply pipe 512 is connected to the air storage tank 511, and the other end of the air supply pipe 512 is connected to the air inlet 301, and the air supply valve 513 is used to control the on and off of the air supply pipe 512.

[0068] It should be noted that, in actual applications, those skilled in the art may configure the air supply component to be connected to only one tooling assembly 31, or may configure the air supply component to be connected to multiple tooling assemblies 31, that is, the air supply component can supply air to multiple tooling assemblies 31 at the same time, and so on. Such flexible adjustments and changes do not deviate from the principles and scope of the present invention, and should be included in the protection scope of the present invention.

[0069] Next Read Figure 3 and Figure 5 , Figure 3 This is a schematic diagram of the connection structure of the RO membrane filter element, the tooling component, and the detection component of the present invention. Figure 2 , which shows a connection diagram of another embodiment, Figure 5 This is a schematic diagram of the connection structure between the PCB filter element and the tooling component and the detection component of the present invention. Figure 2 , which shows a connection diagram of another embodiment.

[0070] Preferably, if Figure 3 and Figure 5 As shown, the air supply component is in communication with the air inlets 301 of the plurality of tooling components 31 , and the air supply component can supply air to the plurality of tooling components 31 .

[0071] Through such an arrangement, on the one hand, the number of air supply components can be reduced, thereby reducing the cost of the airtightness testing equipment; on the other hand, the air supply components can supply air to multiple tooling components 31 at the same time, thereby further improving the testing efficiency of the airtightness testing equipment.

[0072] It should be noted that, in actual applications, the present invention does not impose any limitation on the type of gas used for detection. For example, the gas can be set to air, or the gas can be set to nitrogen, or the gas can be set to any other possible gas, and so on. Such adjustments and changes to the type of gas used for detection do not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.

[0073] Exemplarily, the detection gas is nitrogen.

[0074] It should be noted that, in actual applications, the present invention does not impose any restrictions on the specific setting type of the detection component. For example, the detection component can be set to include an outlet pipe 521 and a flow meter 522 and a control valve 523 arranged on the outlet pipe 521, the flow meter 522 is used to detect the gas flow in the outlet pipe 521, and the control valve 523 is used to control the on-off of the outlet pipe 521 so as to block the first connecting port 302. Alternatively, the detection component can be set to include an outlet pipe 521, a flow meter 522 arranged on the outlet pipe 521, and a blocking member arranged at the end of the outlet pipe 521, the flow meter 522 is used to detect the gas flow in the outlet pipe 521, and the blocking member is used to block the end of the outlet pipe 521 to block the first connecting port 302, and so on. Such adjustments and changes to the specific setting type of the detection component do not deviate from the principle and scope of the present invention and should be included in the protection scope of the present invention.

[0075] Preferably, if Figure 2 and Figure 4 As shown, the detection component includes an air outlet pipe 521 and a flow meter 522 and a control valve 523 arranged on the air outlet pipe 521. The flow meter 522 is used to detect the gas flow in the air outlet pipe 521, and the control valve 523 is used to control the opening and closing of the air outlet pipe 521.

[0076] Through such a setting, it is possible to detect the gas flow flowing out of the pure water outlet 613 by setting up the flow meter 522, and to control the on-off of the gas outlet pipe 521 by the control valve 523, so that the pure water outlet 613 can be blocked, thereby realizing the convenient switching of the detection component between the first detection state and the second detection state.

[0077] It should be noted that since the flow meter 522 is a precision component, if there are impurities in the filter element 6 to be tested, the flow meter 522 will be contaminated, which will not only affect its detection accuracy, but also affect the service life of the air tightness detection equipment.

[0078] Preferably, if Figure 2 and Figure 4As shown, the detection component further includes a filter 524 disposed on the air outlet pipe 521 , and the filter 524 is disposed at the upstream end of the flow meter 522 .

[0079] By setting the filter element 524, the medium before flowing into the flow meter 522 can be filtered to prevent impurities from entering the flow meter 522 and affecting the detection accuracy of the flow meter 522. This can not only improve the detection accuracy of the airtightness detection equipment, but also increase the service life of the airtightness detection equipment.

[0080] Preferably, if Figure 2 and Figure 4 As shown, the detection component also includes a drain pipe 525 connected to the filter element 524 and a drain valve 526 arranged on the drain pipe 525 .

[0081] In this way, it is convenient to discharge the intercepted impurities through the sewage pipe 525.

[0082] It should be noted that, in practical applications, the present invention does not impose any restrictions on the specific setting type of the tooling assembly 31, as long as it can carry the filter element 6 to be detected. For example, the tooling assembly 31 can be configured to include a base plate 311 and a clamping member and a driving member 313 disposed on the base plate 311, and the driving member 313 is used to drive the clamping member to move so as to clamp the filter element 6 to be detected between the clamping members, or the tooling assembly 31 can also be configured to include a base plate 311 and a locking member disposed on the base plate 311, and when the filter element is loaded on the tooling assembly 31, the locking member locks the filter element 6 to be detected on the base plate 311, and so on. Such adjustments and changes to the specific structural form of the tooling assembly 31 do not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.

[0083] The following describes a specific embodiment of the tooling assembly 31 of the present invention by taking the RO tooling compatible with the RO membrane filter element 61 as an example.

[0084] Next Read Figure 6 , Figure 6 It is a schematic structural diagram of the tooling assembly 31 of the present invention.

[0085] like Figure 6 As shown, the tooling assembly 31 includes a base plate 311 and a clamping member and a driving member 313 disposed on the base plate 311. The driving member 313 is used to drive the clamping member to move so as to clamp the filter element 6 to be tested between the clamping members.

[0086] Through such an arrangement, when the filter element 6 to be tested is loaded onto the base plate 311, the filter element 6 to be tested can be automatically clamped on the base plate 311 to prevent the filter element 6 to be tested from falling off the floor. At the same time, the clamping member can be driven to move by the driving member 313 to connect the water interface on the filter element 6 to be tested with the connecting port on the tooling assembly 31, thereby further improving the detection efficiency.

[0087] Specifically, Figure 6 As shown, the clamping member includes a first clamping plate 3121 and a second clamping plate 3122, and the driving member 313 is connected to the second clamping plate 3122 and is used to drive the second clamping plate 3122 to move toward the first clamping plate 3121 so as to clamp the filter element 6 to be tested between the first clamping plate 3121 and the second clamping plate 3122.

[0088] It should be noted that, in actual applications, those skilled in the art may configure the drive component 313 as a cylinder module, or may configure the drive component 313 as a lead screw, etc. This is so long as the adjustment and change of the specific setting type of the drive component 313 does not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.

[0089] Preferably, if Figure 6 As shown, the driving component 313 is a cylinder module.

[0090] It should be noted that, in actual applications, those skilled in the art may arrange the air inlet 301, the first connection port 302, and the second connection port 303 to be located on the bottom plate 311, or, the air inlet 301, the first connection port 302, and the second connection port 303 may be arranged to be located on the first clamping plate 3121, or, the air inlet 301, the first connection port 302, and the second connection port 303 may be arranged to be located on the second clamping plate 3122, and so on. Such adjustments and changes to the specific setting positions of the air inlet 301, the first connection port 302, and the second connection port 303 on the tooling assembly 31 do not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.

[0091] Preferably, if Figure 6 As shown, the air inlet 301 , the first connecting port 302 , and the second connecting port 303 are located on the first clamping plate 3121 .

[0092] It should be noted that, in actual application, the present invention does not impose any limitation on the specific blocking form of the second connection port 303 by the tooling component 31. For example, a blind hole can be provided on the tooling component 31, and the blind hole serves as the second connection port 303 to block the second connection port 303. When the wastewater outlet 612 is connected to the second connection port 303, the wastewater outlet 612 can be blocked. Alternatively, an exhaust pipe can be provided at the second connection port 303, and an exhaust valve can be provided on the exhaust pipe. The exhaust valve can be closed to block the second connection port 303, thereby blocking the wastewater outlet 612. Alternatively, a sealing plug compatible with the second connection port 303 can be provided, and the sealing plug can be inserted into the second connection port 303 to block the second connection port 303, thereby blocking the wastewater outlet 612, and so on. Such adjustments and changes to the specific blocking form of the tooling component 31 to block the second connection port 303 do not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.

[0093] Preferably, if Figure 6 As shown, the second connection port 303 is a blind hole.

[0094] Preferably, a supporting member 314 for supporting the filter element 6 to be tested is also provided on the bottom plate 311, and a handle 315 is also provided on the base 311. The operator holds the handle 315 to fix the bottom plate 311 to facilitate loading and unloading of the filter element 6 to be tested.

[0095] It should be noted that, although the present invention takes the RO tooling compatible with the RO membrane filter element 61 as an example to introduce the tooling assembly 31 of the present invention, this is not restrictive. The tooling assembly 31 of the present invention is also applicable to the PCB tooling compatible with the PCB filter element 62. The only difference is that the PCB tooling is provided with an air inlet 301, a first connection port 302, a second connection port 303 and a third connection port 304, and their specific setting positions are compatible with the PCB filter element 62 to be detected, and can be adjusted according to actual applications, etc. Such flexible adjustments and changes do not deviate from the principles and scope of the present invention, and should be included in the protection scope of the present invention.

[0096] It should also be noted that, in actual applications, those skilled in the art can set a detection component compatible with the RO membrane to detect the air tightness of the RO membrane filter element 61, and set a detection component compatible with the PCB filter element 62 to detect the air tightness of the PCB filter element 62. During the detection, the air tightness detection of different filter elements can be achieved by switching the tooling component 31 and the detection component. Alternatively, the detection component can be set to be universal, that is, the air tightness detection of the RO membrane filter element 61 and the air tightness detection of the PCB filter element 62 can use a common set of detection components, and the air tightness detection of different filter elements can be achieved by switching the tooling component 31, and so on. Such flexible adjustment and change do not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.

[0097] Preferably, the air tightness detection of the RO membrane filter element 61 and the air tightness detection of the PCB filter element 62 can use a common set of detection components.

[0098] Specifically, after replacing the tooling assembly 31 , it is only necessary to connect the air supply component to the air inlet 301 on the tooling assembly 31 , and connect the detection component to the first connection port 302 on the tooling assembly 31 .

[0099] It should be noted that, in actual applications, technicians in this field may only set up one inspection station on the inspection platform 1, and the number of inspection devices is also one, or, two inspection stations may be set up on the inspection platform 1, and the number of inspection devices is also two, or, multiple inspection stations may be set up on the inspection platform 1, and the number of inspection devices is also multiple and arranged one-to-one with the inspection stations, so as to simultaneously detect the air tightness of multiple filter elements 6 to be inspected, etc. Such specific adjustments and changes to the number of inspection stations and the number of inspection devices on the inspection platform 1 do not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.

[0100] Preferably, a plurality of testing stations are arranged on the testing platform 1, and the number of the testing devices is also plural and arranged one-to-one corresponding to the testing stations, so as to simultaneously test the air tightness of a plurality of filter elements 6 to be tested.

[0101] Through such an arrangement, the air tightness of multiple filter elements 6 to be tested can be tested simultaneously, further improving the testing efficiency of the filter elements.

[0102] Exemplarily, the number of the inspection stations is four, the number of the inspection devices is also four and they are arranged in one-to-one correspondence with the inspection stations, that is, one inspection device is arranged at each inspection station.

[0103] It should be noted that, in actual applications, those skilled in the art may test the air tightness of the RO filter element at multiple testing stations, or may test the air tightness of the PCB filter element 62 at multiple testing stations, or may test the air tightness of the RO filter element at some testing stations and test the air tightness of the PCB filter element 62 at other testing stations, and so on. Such flexible adjustments and changes do not deviate from the principle and scope of the present invention and should be included in the protection scope of the present invention.

[0104] Preferably, the air tightness of different filter elements is tested at different testing stations according to actual needs.

[0105] Through such a setting, the air tightness of different filter elements can be tested at different workstations according to actual testing needs, thereby increasing the application scope of the air tightness testing equipment, further reducing the testing cost and improving the testing efficiency.

[0106] In addition, the present invention also provides an air tightness detection method for a filter element, and the air tightness detection device introduced above is used to detect the air tightness of the filter element.

[0107] Specifically, see Figure 7 , Figure 7 The present invention is a flow chart of the air tightness detection method for the filter element.

[0108] like Figure 7 As shown, the air tightness detection method of the present invention comprises the following steps:

[0109] S1: Check the air tightness of the filter housing;

[0110] S2: Determine whether the air tightness of the filter housing is good;

[0111] S3: Determine whether the filter element is qualified based on the judgment result.

[0112] With such an arrangement, it is possible to determine whether the filter element is qualified by first testing the air tightness of the filter element shell and judging whether the air tightness of the filter element shell is good. Therefore, when the air tightness of the filter element shell is not good, the bypass air tightness test of the filter element is not required, thereby avoiding the problem of low detection efficiency caused by further testing the bypass air tightness when the air tightness of the shell is not good, thereby further improving the detection efficiency of the filter element.

[0113] The following two situations are combined to introduce the specific detection method of the air tightness of the filter element shell.

[0114] Scenario 1:

[0115] The filter element 6 to be tested is an RO membrane filter element 61, and the step of "testing the air tightness of the housing of the filter element" specifically includes:

[0116] S11: Load the filter element 6 to be tested onto the tooling assembly 31, wherein the tooling assembly 31 is an RO tooling adapted to the filter element 6 to be tested, and connect the raw water inlet 611 to the air inlet 301, connect the pure water outlet 613 to the first connection port 302, and connect the waste water outlet 612 to the second connection port 303;

[0117] S12: The detection component blocks the first connection port 302 (ie, closes the control valve 523 ), and the air supply component inflates the air inlet 301 ;

[0118] S13: The driving mechanism 4 drives the tooling assembly 31 to move, and immerses the filter element in the detection tank 2;

[0119] S14: Check whether there are bubbles around the filter housing;

[0120] S15: According to the test results, determine whether the air tightness of the filter element shell is good.

[0121] Through such an arrangement, compared with the method of manually testing the air tightness of the filter element shell, testing the air tightness of the filter element shell by air tightness testing equipment can not only improve the detection efficiency of the filter element, but also save manpower and material resources.

[0122] Scenario 2:

[0123] The filter element 6 to be tested is a PCB filter element 62, and the step of "testing the air tightness of the housing of the filter element" specifically includes:

[0124] S11: Load the filter element 6 to be tested onto the tooling assembly 31, wherein the tooling assembly 31 is a PCB tooling adapted to the filter element 6 to be tested, and connect the first water inlet 621 with the air inlet 301, connect the first water outlet 622 with the first connecting port 302, connect the second water inlet 623 with the second connecting port 303, and connect the second water outlet 624 with the third connecting port 304;

[0125] S12: The gas supply component supplies gas to the gas inlet 301, and the detection component detects the gas flow rate flowing out of the first connection port 302;

[0126] S13: If the gas flow rate cannot reach the second preset flow rate, the filter element is unqualified; if the gas flow rate reaches the second preset flow rate, the driving mechanism 4 drives the tooling assembly 31 to move and put the filter element into the detection tank 2;

[0127] S14: Check whether there are bubbles around the filter housing;

[0128] S15: According to the test results, determine whether the air tightness of the filter element shell is good.

[0129] That is, first load the PCB filter element 62 onto the PCB tooling, and make the air supply component supply air to the cavity through the air inlet 301, first detect the gas flow rate flowing out of the first water outlet 622 through the detection component, if the gas flow rate reaches the second preset flow rate, it means that there is no blockage in the first processing channel, then continue to immerse the filter element in the detection tank 2, observe whether there are bubbles around the outer shell, and judge whether the air tightness of the filter element outer shell is good, if the gas flow rate does not reach the second preset flow rate, it means that the first processing channel is blocked, then the filter element is unqualified, and there is no need to immerse the filter element in the detection tank 2 for detection.

[0130] Preferably, in the above step S15, the step of "determining whether the air tightness of the housing of the filter element is good according to the detection result" specifically includes:

[0131] S151: If bubbles appear around the filter housing, the filter housing is not airtight;

[0132] S152: If there are no bubbles around the filter housing, the filter housing is airtight.

[0133] It should be noted that, in actual applications, it is possible to detect whether bubbles are coming out around the filter element housing by manual observation, and manually input the information into the controller of the detection device, so as to judge whether the air tightness of the filter element housing is good based on the detection results. Alternatively, a bubble detection component may be provided to detect whether bubbles are coming out around the filter element housing, and the bubble detection component transmits the detection results to the controller of the detection device, so as to judge whether the air tightness of the filter element housing is good based on the detection results, and so on. Such flexible adjustments and changes do not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.

[0134] Preferably, the air tightness detection device of the present invention further comprises a bubble detection component, through which it is detected whether bubbles are emitted around the filter element housing.

[0135] Through such a setting, it is possible to automatically detect whether there are bubbles around the filter element shell, further saving manpower and improving the detection efficiency of the filter element. At the same time, it can also improve the detection accuracy of the filter element and improve the qualified rate of the product.

[0136] Next Read Figure 8 , Figure 8 It is a flow chart of an embodiment of the air tightness detection method for a filter element of the present invention.

[0137] Preferably, if Figure 8 As shown in the figure, the steps of "determining whether the filter element is qualified according to the judgment result" specifically include:

[0138] S31: If the judgment result is "No", it is determined that the filter element is unqualified.

[0139] Through such a setting, when the judgment result is "no", it means that the air tightness of the outer shell of the filter element is not good. That is, there is no need to continue to detect whether the inside of the filter element is bypassed. The filter element can be determined to be unqualified. In this way, the detection efficiency of the filter element can be further improved.

[0140] Preferably, if Figure 8 As shown in the figure, the steps of "determining whether the filter element is qualified according to the judgment result" specifically include:

[0141] S32: If the judgment result is "yes", further testing the bypass air tightness of the filter element;

[0142] S33: Determine whether the filter element is bypassed;

[0143] S34: Determine whether the filter element is qualified based on the judgment result.

[0144] With such a setting, when the judgment result is "yes", it means that the air tightness of the filter element shell is good. At this time, the bypass air tightness of the filter element is further tested to determine whether the filter element is bypassed, and whether the filter element is qualified is determined based on whether the filter element is bypassed. On the basis of the good air tightness of the filter element shell, it can be detected whether the filter element has the possibility of water leakage, thereby enabling the filter element to be tested more comprehensively and improving the product qualification rate.

[0145] Preferably, if Figure 8 As shown in the figure, the steps of "determining whether the filter element is qualified according to the judgment result" specifically include:

[0146] S341: If the judgment result is "yes", the filter element is unqualified;

[0147] S342: If the judgment result is "No", the filter element is qualified.

[0148] Through such a setting, when the judgment result is "yes", it means that the filter element is bypassed, that is, the first channel and the second channel of the filter element are connected to each other (for example, the raw water channel and the pure water channel of the RO membrane filter element 61 are connected, or the raw water treatment channel and the pure water treatment channel of the PCB filter element 62 are connected), and there is a problem of water cross-talk during actual use. Therefore, the filter element is unqualified. When the judgment result is "no", it means that the first channel and the second channel of the filter element are not connected, that is, there is no risk of water cross-talk during actual use of the filter element. Therefore, the filter element is qualified.

[0149] It should be noted that, in actual applications, the present invention does not impose any limitation on the specific detection method of the bypass air tightness of the filter element. For example, the bypass air tightness of the filter element can be detected manually, or the air tightness detection equipment introduced above can be used to detect the bypass air tightness of the filter element, and so on. Such adjustments and changes to the specific detection method of the bypass air tightness of the filter element do not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.

[0150] The following two situations are combined to introduce the specific detection method of the air tightness of the filter element shell.

[0151] Scenario 1:

[0152] The filter element 6 to be tested is an RO membrane filter element 61, and the step of "testing the bypass air tightness of the filter element" specifically includes:

[0153] S41: enabling the detection component to open the first connection port 302 and detect the gas flow rate flowing out of the pure water outlet 613;

[0154] S42: Determine whether the gas flow rate exceeds a first preset flow rate;

[0155] S43: Determine whether the filter element is bypassed based on the judgment result.

[0156] With such an arrangement, when the second connection port 303 is blocked, the detection component is arranged to open the first connection port 302, and the gas supply component supplies gas into the cavity, so that the gas can flow out from the first connection port 302 (i.e., the pure water outlet 613). If the gas flow rate flowing out from the pure water outlet 613 exceeds the first preset flow rate, it means that the gas flow rate entering the pure water channel is too large, and the gas in the cavity or the first channel may directly enter the pure water channel, i.e., the filter element is bypassed. If the gas flow rate flowing out from the pure water outlet 613 does not exceed the first preset flow rate, it means that the gas flow rate entering the pure water channel is within the preset range, indicating that there is no air leakage inside the filter element, which means that the filter element is not bypassed.

[0157] Preferably, the step of "determining whether the filter element is bypassed according to the judgment result" specifically includes:

[0158] S431: If the judgment result is "yes", the filter element is bypassed;

[0159] S432: If the judgment result is "No", the filter element is not bypassed.

[0160] Scenario 2:

[0161] The filter element 6 to be tested is a PCB membrane filter element, and the steps of "testing the bypass air tightness of the filter element" specifically include:

[0162] S41: enabling the detection component to block the first connection port 302 (ie, block the first water outlet 622);

[0163] S42: Inflate the air supply component through the air inlet 301 cavity;

[0164] S43: The driving mechanism 4 drives the tooling assembly 31 to move, and immerses the filter element in the detection tank 2;

[0165] S44: Detect whether there are bubbles coming out from the third connection port 304 (i.e., the second water outlet 624);

[0166] S45: According to the detection result, determine whether the filter element is bypassed.

[0167] Preferably, the step of "determining whether the filter element is bypassed according to the detection result" specifically includes:

[0168] If bubbles emerge from the third connection port 304, it means that the filter element is bypassed;

[0169] If no bubbles emerge from the third connection port 304, it means that the filter element is not bypassed.

[0170] Through such an arrangement, if bubbles emerge from the third connection port 304, it means that the gas in the cavity or the first processing channel can enter the second processing channel, that is, the cavity or the first processing channel is connected to the second processing channel, then the filter element is bypassed, and there is a problem of water cross-talk; if no bubbles emerge from the third connection port 304, it means that the water in the cavity and the first processing channel has not entered the second processing channel, then the filter element is not bypassed, and there is no problem of water cross-talk.

[0171] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. An air tightness detection device for a filter element, characterized in that: The air tightness testing equipment comprises a testing platform, a testing pool and a testing device arranged on the testing platform, the testing device comprises a tooling assembly, a testing assembly and a driving mechanism, the tooling assembly is adapted to the filter element to be tested and is used to load the filter element to be tested, and the driving mechanism can drive the tooling assembly to move so as to immerse the filter element to be tested into the testing pool. The filter element to be tested includes an outer shell and a filter component arranged in the outer shell, a cavity is formed between the outer shell and the filter component, the filter component has at least a first channel and a second channel that are not connected to each other, the inlet end of the first channel is connected to the cavity, the detection component is configured to be able to inflate the cavity so as to detect the air tightness of the outer shell of the filter element to be tested, and the detection component is also configured to be able to detect whether the first channel and / or the cavity is connected to the second channel so as to detect whether the interior of the filter element to be tested is bypassed.

2. The air tightness detection device for filter element according to claim 1, characterized in that: The filter element to be tested is an RO membrane filter element, the housing is provided with a raw water inlet, a waste water outlet and a pure water outlet, the raw water inlet is connected to the cavity, the first channel is a raw water channel, and the second channel is a pure water channel. The tooling assembly is an RO tooling adapted to the RO membrane filter element, and the RO tooling is provided with an air inlet adapted to the raw water inlet, a first connection port adapted to the pure water outlet, and a second connection port adapted to the waste water outlet, and the RO tooling can block the second connection port; The detection component includes an air supply component and a detection component, wherein the air supply component is connected to the air inlet and is used to inflate the cavity, and the detection component is connected to the first connection port. The detection component is configured to block the first connection port when it is in a first detection state and to open the first connection port when it is in a second detection state to detect the gas flow flowing out of the first connection port.

3. The air tightness detection device for a filter element according to claim 1, characterized in that: The filter element to be detected is a PCB filter element, and the housing is provided with a first water inlet, a first water outlet, a second water inlet and a second water outlet, the first water inlet is connected to the cavity, the first channel is a raw water treatment channel, the second channel is a pure water treatment channel, the water inlet end of the raw water treatment channel is connected to the cavity, the water outlet end of the raw water treatment channel is connected to the first water outlet, the water inlet end of the pure water treatment channel is connected to the second water inlet, and the water outlet end of the pure water treatment channel is connected to the second water outlet, The tooling assembly is a PCB tooling adapted to the PCB filter element, and the PCB tooling is provided with an air inlet adapted to the first water inlet, a first connection port adapted to the first water outlet, a second connection port adapted to the second water inlet, and a third connection port adapted to the second water outlet, and the PCB tooling can block the second connection port; The detection component includes an air supply component and a detection component, wherein the air supply component is connected to the air inlet and is used to inflate the cavity, and the detection component is connected to the first connecting port. The detection component is configured to detect the gas flow rate flowing out of the first water outlet when it is in a first detection state, and the detection component is configured to block the first water outlet when it is in a second detection state.

4. The air tightness detection device for a filter element according to claim 2 or 3, characterized in that: The air supply component includes an air storage tank, an air supply pipe and an air supply valve, one end of the air supply pipe is connected to the air storage tank, the other end of the air supply pipe is connected to the air inlet, and the air supply valve is arranged on the air supply pipe and is used to control the on and off of the air supply pipe; And / or, the detection component includes an air outlet pipe and a flow meter and a control valve arranged on the air outlet pipe, the flow meter is used to detect the gas flow in the air outlet pipe, and the control valve is used to control the opening and closing of the air outlet pipe.

5. The air tightness detection device for filter element according to claim 4, characterized in that: The detection component further comprises a filter element arranged on the air outlet pipe, and the filter element is arranged at the upstream end of the flow meter; Alternatively, the detection component further includes a filter element arranged on the air outlet pipe, a sewage discharge pipe connected to the filter element, and a sewage discharge valve arranged on the sewage discharge pipe.

6. The air tightness detection device for a filter element according to claim 1, characterized in that: The tooling assembly comprises a base plate, and a clamping member and a driving member arranged on the base plate, wherein the driving member is used to drive the clamping member to move so as to clamp the filter element to be tested between the clamping members; And / or, the driving mechanism comprises a carrying plate and a driving assembly, and when installed, the tooling assembly is located on the carrying plate, and the driving assembly is used to drive the carrying plate to move so as to immerse the filter element to be tested into the testing pool; And / or, a plurality of inspection stations are arranged on the inspection table, and the number of the inspection devices is multiple and they are arranged one-to-one corresponding to the inspection stations, so as to perform air tightness inspection on a plurality of filter elements to be inspected at the same time.

7. A method for testing the air tightness of a filter element, using the air tightness testing device according to any one of claims 1 to 6 to test the filter element, characterized in that: The detection method comprises the following steps: Detecting the air tightness of the outer shell of the filter element to determine whether the air tightness of the outer shell of the filter element is good; According to the judgment result, it is determined whether the filter element is qualified.

8. The air tightness detection method for a filter element according to claim 7, characterized in that: The step of "determining whether the filter element is qualified according to the judgment result" specifically includes: If the judgment result is "No", the filter element is unqualified.

9. The air tightness detection method for a filter element according to claim 7, characterized in that: The step of "determining whether the filter element is qualified according to the judgment result" specifically includes: If the judgment result is "yes", the bypass air tightness of the filter element is further tested to determine whether the filter element is bypassed; According to the judgment result, it is determined whether the filter element is qualified.

10. The air tightness detection method for a filter element according to claim 9, characterized in that: The step of "determining whether the filter element is qualified according to the judgment result" specifically includes: If the judgment result is "yes", the filter element is unqualified; And / or, if the judgment result is "no", the filter element is qualified.

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