Cleanness extraction equipment

Abstract

The utility model relates to cleanliness extraction equipment, which belongs to the technical field of cleanliness detection and comprises a box body, a cleaning tank component capable of reducing metal particles so as to improve a blank value is arranged in an inner cavity of the box body, and an air filter component capable of increasing internal air pressure of the cleaning tank component so as to reduce granularity in internal air is arranged on the left side of the box body. A circulation assembly is arranged at the bottom of an inner cavity of the box body, and a liquid filtering structure used for filtering liquid is arranged in the circulation assembly. According to the cleanliness extraction equipment, firstly, the blank value can be effectively reduced through the design of the cleaning tank assembly, then clean air is continuously output through the air filtering assembly, the blank value is reduced, and finally, through cooperation of a liquid filtering structure and the circulating assembly, the detection precision can be guaranteed, and the blank value is reduced; according to the device, through mutual cooperation of the cleaning tank assembly, the air filter assembly, the liquid filter structure and the circulation assembly, the blank value can be greatly reduced, and the influence of equipment on a product test result is basically eliminated.

Description

Technical Field

[0001] This utility model relates to the field of cleanliness detection technology, specifically a cleanliness extraction device. Background Technology

[0002] In the cleanliness testing industry, "blank value" is a key concept. It refers to the amount of impurities that do not originate from the sample during the cleaning and extraction process without the participation of any components. These impurities may come from various factors such as cleaning fluid, cleaning equipment, operating process, environment, and personnel. The size of the blank value is crucial to ensuring the accuracy and reliability of cleanliness testing. As people's requirements for cleanliness become higher and higher, cleanliness extraction equipment is also constantly developing.

[0003] For example, Chinese patent (publication number: CN218610657U) discloses a cleaning tank for a cleanliness extraction device, including a tank body, an air filter installation hole at the top of the tank body, a spray nozzle at the top of the tank body, an LED light installation hole at the top of the tank body, a door frame groove on the front of the tank body, a door frame slot on one side of the door frame groove, and a drain outlet at the bottom of the tank body. This utility model effectively reduces liquid leakage during cleaning by integrating the tank body and the door frame. By providing an air filter installation hole at the top of the tank body, a positive pressure system is formed inside the cleaning tank during operation, which can prevent external particles from entering the cleaning chamber. By designing the tank body as a cone shape and using an 8K mirror panel with mirror polishing, no cleaning liquid residue is left inside after the cleaning work is completed, which facilitates better long-term use.

[0004] However, the blank value of this device is still relatively high. Since the tank is made of mirror stainless steel, metal particles may be generated in each step of laser cutting, bending, welding, grinding and polishing, which will affect the blank value of the cleaning tank. Therefore, a cleanliness extraction device is proposed to solve the above problems. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a cleanliness extraction device with advantages such as low blank value, thus solving the problem of excessively high blank value.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a cleanliness extraction device, comprising a housing, wherein the inner cavity of the housing is provided with a cleaning tank assembly capable of reducing metal particles and thereby increasing the blank value, and the left side of the housing is provided with an air filter assembly that increases the internal air pressure of the cleaning tank assembly to reduce the particle size in the internal air, and the bottom of the inner cavity of the housing is provided with a circulation assembly, wherein the circulation assembly is provided with a liquid filter structure 4 for filtering liquid;

[0007] The cleaning tank assembly includes stainless steel fixed to the side wall of the inner cavity of the tank, and the inner side of the stainless steel is coated with a layer of Teflon.

[0008] Furthermore, the air filter assembly includes an air pump fixed to the left side of the housing, an air pipe fixedly connected to the output end of the air pump, an air inlet pipe fixedly connected to the end of the air pipe away from the air pump, a HEPA high-efficiency air filter fixedly connected to the left side of the air inlet pipe, the HEPA high-efficiency air filter being fixed to the inner top wall of the housing, and an air filter element fixed to the bottom of the HEPA high-efficiency air filter.

[0009] Furthermore, the side of the cleaning tank assembly is provided with a vent hole and a water vent hole, and the air filter element is fixed to the vent hole.

[0010] Furthermore, the liquid filtration structure consists of a primary filter, a secondary filter, and a tertiary filter. A baffle is fixed on the left side of the housing and below the cleaning tank assembly. The primary filter, the secondary filter, and the tertiary filter are all fixed to the left side of the baffle.

[0011] Furthermore, the circulation component consists of a storage tank, a negative pressure section, a recovery pipe, and a liquid outlet. The storage tank is fixedly connected to the negative pressure section and the liquid outlet through a flow pipe, and the storage tank is fixedly connected to the water outlet of the cleaning tank component through a recovery pipe.

[0012] Furthermore, the negative pressure section includes a vacuum valve that is fixedly connected to the liquid storage tank through a flow pipe, and a vacuum pump is fixed to the other end of the vacuum valve through the flow pipe.

[0013] Furthermore, a cleaning and recovery valve is fixed inside the recovery pipeline, and one end of the recovery pipeline near the storage tank is fixedly connected to the primary filter, and the outlet end of the primary filter is fixedly connected to the storage tank.

[0014] Furthermore, the liquid outlet section consists of a hydraulic pump and a flow meter. The liquid storage tank and the hydraulic pump are fixedly connected via a flow pipe. The hydraulic pump and the flow meter are connected via a pump pressure and a flow pipe. The outlet of the flow meter is fixedly connected to the inlet of the secondary filter via a flow pipe. The outlet of the secondary filter is fixedly connected to a cleaning pipe and a spray pipe. The secondary filter and the tertiary filter are fixedly connected via a cleaning pipe. The inlet and outlet of the tertiary filter are respectively provided with spray pressure and cleaning pressure. The outlet of the tertiary filter is fixedly connected to a flushing valve and a cleaning valve via a cleaning pipe. Pressure sensors located on the front and rear sides of the liquid filter structure are fixed on both the cleaning pipe and the spray pipe. The outlets of the flushing valve and the cleaning valve are fixedly connected to the cleaning tank assembly via a cleaning pipe. The end of the spray pipe away from the secondary filter is fixedly connected to a spray valve. The outlet of the spray valve is fixedly connected to a nozzle via a flow pipe. The nozzle is adapted to the water passage of the cleaning tank assembly.

[0015] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0016] This cleanliness extraction equipment firstly effectively isolates metal particles that may be generated after laser cutting, bending, welding, and polishing through the design of the cleaning tank assembly, further reducing the blank value. Secondly, the air filter assembly continuously outputs clean air, further increasing the air pressure inside the cleaning tank assembly, thus preventing external air from carrying foreign matter into the cleaning tank assembly, thereby reducing the blank value. Finally, the liquid filtration structure and circulation assembly work together to ensure that the liquid in the cleaning tank is relatively pure, guaranteeing detection accuracy and reducing the blank value. Through the coordinated operation of the cleaning tank assembly, air filter assembly, liquid filtration structure, and circulation assembly, this device can significantly reduce the blank value. Compared to other products on the market where the maximum metal particle size is typically >200μm, this equipment can easily achieve a maximum metal particle size below 50μm, essentially eliminating the equipment's influence on product test results. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the cleaning tank assembly of this utility model;

[0019] Figure 3 This is a schematic diagram illustrating the air circulation effect of this utility model;

[0020] Figure 4 This is a schematic diagram of the liquid filtration structure of this utility model;

[0021] Figure 5This is a diagram showing the connection relationship between the liquid filter structure and the housing of this utility model;

[0022] Figure 6 This is a pipeline diagram for the liquid circulation of this utility model.

[0023] In the diagram: 1. Housing, 2. Cleaning tank assembly, 201 stainless steel, 203 Teflon, 3. Air filter assembly, 301 air pump, 302 vent pipe, 303 air inlet pipe, 304 HEPA high-efficiency air filter, 305 air filter element, 4. Liquid filter structure, 401 primary filter, 402 secondary filter, 403 tertiary filter, 5. Circulation assembly, 501 liquid storage tank, 502 negative pressure section, 5021 vacuum valve, 5022 vacuum pump, 503 recovery pipe, 504 liquid outlet, 5041 hydraulic pump, 5042 flow meter. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figures 1 to 3 A cleanliness extraction device in this embodiment includes a housing 1. The inner cavity of the housing 1 is provided with a cleaning tank assembly 2 that can reduce metal particles and thus increase the blank value. The left side of the housing 1 is provided with an air filter assembly 3 that increases the internal air pressure of the cleaning tank assembly 2 to reduce the particle size in the internal air. The right side of the housing 1 and below the cleaning tank assembly 2 is provided with a liquid filter structure 4. The bottom of the inner cavity of the housing 1 is provided with a circulation assembly 5.

[0026] In addition, the cleaning tank assembly 2 includes a stainless steel 201 fixed to the side wall of the inner cavity of the housing 1. The inner side of the stainless steel 201 is coated with a layer of Teflon 203. First, the stainless steel 201 needs to be sandblasted to remove oil, rust and other impurities from the metal surface and enhance the adhesion between Teflon 203 and stainless steel 201. Then, Teflon 203 can be sprayed. The spraying of Teflon 203 needs to control the spraying thickness and uniformity. Usually, a spray gun is used for spraying, and the spraying thickness is generally 20-30μm. After the Teflon 203 is sprayed, it needs to be cured. The curing temperature is usually between 380-420 degrees Celsius, and the curing time depends on the coating thickness and curing temperature, generally 10-30 minutes. After curing, Teflon 203 can exert its excellent performance.

[0027] It is known that the air filter assembly 3 includes an air pump 301 fixed to the left side of the housing 1. The output end of the air pump 301 is fixedly connected to an air pipe 302. The end of the air pipe 302 away from the air pump 301 is fixedly connected to an air inlet pipe 303. The left side of the air inlet pipe 303 is fixedly connected to a HEPA high-efficiency air filter 304. The HEPA high-efficiency air filter 304 is fixed to the inner top wall of the housing 1. An air filter element 305 is fixed to the bottom of the HEPA high-efficiency air filter 304. The HEPA high-efficiency air filter 304 is set because its filtration accuracy is 0.3um and its filtration efficiency is as high as 99.995%, which can maximize the cleanliness of the cleaning environment.

[0028] It should be further explained that the inner side of the cleaning tank assembly 2 is provided with vent holes and water holes, and the air filter element 305 is fixed to the vent holes. The vent holes and water holes can ensure the smooth entry of clean air and clean liquid, and ensure the smooth cleaning process.

[0029] In this embodiment, the device isolates the stainless steel 201, which may generate metal particles, through physical isolation. The isolation material is Teflon 203, which has very stable chemical properties. First, Teflon 203 is a plastic that does not generate metal particles. Moreover, it does not react chemically with various cleaning liquids and has certain lubrication and anti-stick properties, perfectly meeting all the characteristics of improving the blank value of the cleaning tank. Therefore, the cleaning tank component 2 with Teflon 203 surface coating can significantly improve the blank value test results and avoid the metal particles in the cleaning tank component 2 affecting the experimental results.

[0030] Please see Figure 1 and Figures 4 to 6 To further reduce the blank value, the liquid filtration structure 4 in this embodiment consists of a primary filter 401, a secondary filter 402, and a tertiary filter 403. A baffle is fixed on the left side of the housing 1 and below the cleaning tank assembly 2. The primary filter 401, the secondary filter 402, and the tertiary filter 403 are all fixed to the left side of the baffle. Pressure detection devices are provided near the primary filter 401, the secondary filter 402, and the tertiary filter 403. The filtration accuracy of the primary filter 401 is 10µm, the filtration accuracy of the secondary filter 402 is 5µm, and the filtration accuracy of the tertiary filter 403 is 0.22µm.

[0031] It is known that the circulation component 5 consists of a storage tank 501, a negative pressure section 502, a recovery pipe 503, and a liquid outlet section 504. The storage tank 501 is fixedly connected to the negative pressure section 502 and the liquid outlet section 504 through a flow pipe. The storage tank 501 is fixedly connected to the water outlet of the cleaning tank component 2 through the recovery pipe 503. The negative pressure section 502 can cause a negative pressure to be formed in the storage tank 501, which further enables the storage tank 501 to smoothly pump the liquid back into the storage tank 501, thus completing the circulation.

[0032] It should be further explained that the negative pressure unit 502 includes a vacuum valve 5021 that is fixedly connected to the liquid storage tank 501 through a flow pipe. The other end of the vacuum valve 5021 is fixed to a vacuum pump 5022 through a flow pipe. The vacuum valve 5021 can block the liquid and prevent the liquid from entering the vacuum pump 5022.

[0033] Furthermore, a cleaning and recovery valve is fixed inside the recovery pipe 503. One end of the recovery pipe 503 near the storage tank 501 is fixedly connected to the primary filter 401. The outlet end of the primary filter 401 is fixedly connected to the storage tank 501. The cleaning and recovery valve ensures that the liquid flows out smoothly and undergoes preliminary filtration through the primary filter 401, ensuring that the liquid in the storage tank 501 remains clean.

[0034] Additionally, the liquid outlet section 504 consists of a hydraulic pump 5041 and a flow meter 5042. The storage tank 501 is fixedly connected to the hydraulic pump 5041 via a flow pipe. The hydraulic pump 5041 and the flow meter 5042 are connected via a pumping pipe. The outlet of the flow meter 5042 is fixedly connected to the inlet of the secondary filter 402 via a flow pipe. The outlet of the secondary filter 402 is fixedly connected to a cleaning pipe and a spray pipe. The secondary filter 402 and the tertiary filter 403 are fixedly connected via a cleaning pipe. The inlet and outlet of the tertiary filter 403 are respectively equipped with spray pipes. The three-stage filter 403 has a fixed connection between its outlet end and a flushing valve and a cleaning valve via a cleaning pipe. Pressure sensors are fixed on both the cleaning pipe and the spray pipe, located on the front and rear sides of the liquid filter structure 4. The outlet ends of the flushing valve and the cleaning valve are fixedly connected to the cleaning tank assembly 2 via the cleaning pipe. The end of the spray pipe away from the secondary filter 402 is fixedly connected to a spray valve. The outlet end of the spray valve is fixed with a nozzle via a flow pipe. The nozzle is adapted to the water passage of the cleaning tank assembly 2. The setting of spray valve, flushing valve and cleaning valve can correspond to a variety of different cleaning methods, further improving the cleaning function of the equipment and improving the cleaning effect.

[0035] In this embodiment, the hydraulic pump 5041 draws liquid from the storage tank 501. The liquid is measured by the flow meter 5042 and filtered by the secondary filter 402 and the tertiary filter 403. After the cleaning valve is opened, the liquid flows out from the nozzle to rinse the cleaning tank. At the same time, the vacuum pump 5022 works to extract the air from the storage tank 501, creating a negative pressure in the tank. The storage tank 501 is connected to the bottom of the cleaning tank assembly 2, and the liquid in the cleaning tank is pumped back into the storage tank 501. During the recovery process, the liquid passes through the primary filter 401 to ensure that the liquid returning to the storage tank 501 is relatively clean. The cycle is repeated until the cleaning is completed. By detecting the pressure at both ends of the liquid filter structure 4, the cleanliness of the filter element in the liquid filter structure 4 is ensured in real time, and the experimental parameters are not affected by the blockage of the filter element.

[0036] Understandably, the cooperation of the cleaning tank assembly 2, air filter assembly 3, liquid filter structure 4, and circulation assembly 5 can effectively reduce the blank value and further improve the detection effect. At the same time, the air filter assembly 3 can ensure that the internal pressure of the cleaning tank assembly 2 is greater than the outdoor pressure. Furthermore, by using a pressure gauge with one end connected to the inside of the cleaning tank assembly 2 and the other end connected to the outdoor air, the pressure difference between the cleaning tank assembly 2 and the outside is maintained at about 50 Pa. This further ensures that external particles will not enter the cleaning tank assembly 2 during cleaning and when the door is opened, thus further reducing the blank value of the cleaning tank.

[0037] All electrical components mentioned in this article are electrically connected to the controller and power supply. The control method of this utility model is controlled by the controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the art. Furthermore, this utility model is mainly used to protect mechanical devices, so the control method and circuit connection will not be explained in detail.

[0038] The working principle of the above embodiments is as follows:

[0039] First, stainless steel 201 ensures the overall strength of the cleaning tank assembly 2. Then, Teflon 203 effectively isolates metal particles that may be generated during production stages such as laser cutting, bending, welding, and polishing, further reducing the blank value within the cleaning tank assembly 2. Next, the liquid filter structure 4 filters the liquid on the recovery pipe 503 and the liquid outlet 504 of the circulation assembly 5 to different degrees, ensuring that the liquid entering the cleaning tank assembly 2 is relatively pure. Finally, air is continuously drawn in by the air pump 301 on the air filter assembly 3, and the air is drawn into the HEPA high-efficiency air filter through the vent pipe 302 and the air inlet pipe 303. In filter 304, clean air is blown into the cleaning tank assembly 2 through air filter element 305, causing positive pressure to be formed inside the cleaning tank assembly 2, ensuring that external air cannot enter the cleaning tank assembly 2, further improving detection accuracy and reducing blank value. Through the cooperation of cleaning tank assembly 2, air filter assembly 3, liquid filter structure 4 and circulation assembly 5, this device can significantly reduce blank value. Compared with the blank value of other products on the market—the largest metal particle size is usually >200μm, the largest metal particle size of this device can easily reach below 50μm, basically eliminating the influence of the device on product test results.

[0040] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A cleanliness extraction device, comprising a housing (1), characterized in that: The inner cavity of the box (1) is provided with a cleaning tank assembly (2) that can reduce metal particles and thus increase the blank value. The left side of the box (1) is provided with an air filter assembly (3) that increases the internal air pressure of the cleaning tank assembly (2) to reduce the particle size in the internal air. The bottom of the inner cavity of the box (1) is provided with a circulation assembly (5). The circulation assembly (5) is provided with a liquid filter structure (4) for filtering liquid. The cleaning tank assembly (2) includes a stainless steel (201) fixed to the side wall of the inner cavity of the box (1), and the inner side of the stainless steel (201) is coated with a layer of Teflon (203).

2. The cleanliness extraction device according to claim 1, characterized in that: The air filter assembly (3) includes an air pump (301) fixed to the left side of the housing (1). The output end of the air pump (301) is fixedly connected to an air pipe (302). The end of the air pipe (302) away from the air pump (301) is fixedly connected to an air inlet pipe (303). The left side of the air inlet pipe (303) is fixedly connected to a HEPA high-efficiency air filter (304). The HEPA high-efficiency air filter (304) is fixed to the inner top wall of the housing (1). An air filter element (305) is fixed to the bottom of the HEPA high-efficiency air filter (304).

3. The cleanliness extraction device according to claim 2, characterized in that: The cleaning tank assembly (2) has a vent hole and a water hole on its side, and the air filter (305) is fixed to the vent hole.

4. The cleanliness extraction device according to claim 3, characterized in that: The liquid filtration structure (4) consists of a primary filter (401), a secondary filter (402) and a tertiary filter (403). A baffle is fixed on the left side of the housing (1) and below the cleaning tank assembly (2). The primary filter (401), the secondary filter (402) and the tertiary filter (403) are all fixed to the left side of the baffle.

5. The cleanliness extraction device according to claim 4, characterized in that: The circulation component (5) consists of a storage tank (501), a negative pressure section (502), a recovery pipe (503), and a liquid outlet (504). The storage tank (501) is fixedly connected to the negative pressure section (502) and the liquid outlet (504) through a flow pipe. The storage tank (501) is fixedly connected to the water outlet of the cleaning tank component (2) through the recovery pipe (503).

6. The cleanliness extraction device according to claim 5, characterized in that: The negative pressure unit (502) includes a vacuum valve (5021) that is fixedly connected to the liquid storage tank (501) through a flow pipe, and a vacuum pump (5022) is fixed to the other end of the vacuum valve (5021) through a flow pipe.

7. The cleanliness extraction device according to claim 5, characterized in that: A cleaning and recovery valve is fixed inside the recovery pipe (503). One end of the recovery pipe (503) near the storage tank (501) is fixedly connected to the primary filter (401). The outlet end of the primary filter (401) is fixedly connected to the storage tank (501).

8. The cleanliness extraction device according to claim 5, characterized in that: The liquid outlet section (504) consists of a hydraulic pump (5041) and a flow meter (5042). The liquid storage tank (501) is fixedly connected to the hydraulic pump (5041) via a flow pipe. The hydraulic pump (5041) and the flow meter (5042) are connected by a pump and a flow pipe. The outlet of the flow meter (5042) is fixedly connected to the inlet of the secondary filter (402) via a flow pipe. The outlet of the secondary filter (402) is fixedly connected to a cleaning pipe and a spray pipe. The secondary filter (402) and the tertiary filter (403) are connected by a cleaning pipe. The three-stage filter (403) is fixedly connected to the inlet and outlet of the filter. The outlet of the filter (403) is fixedly connected to the rinsing valve and the cleaning valve through the cleaning pipe. Pressure sensors are fixed on both the cleaning pipe and the spray pipe, located on the front and rear sides of the liquid filter structure (4). The outlet of the rinsing valve and the cleaning valve are fixedly connected to the cleaning tank assembly (2) through the cleaning pipe. The end of the spray pipe away from the secondary filter (402) is fixedly connected to the spray valve. The outlet of the spray valve is fixedly connected to the nozzle through the flow pipe. The nozzle is adapted to the water passage of the cleaning tank assembly (2).

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