Fresh air device, exhaust method and cleaning equipment

Abstract

The application belongs to the technical field of optical lens processing, and discloses a fresh air device, an exhaust method and a cleaning equipment. The fresh air device is used for exhausting waste gas in the equipment to a workshop, and comprises an air inlet assembly, a circulation assembly and an air outlet assembly. The air inlet assembly is in communication with the equipment to continuously blow air into the equipment; the circulation assembly is in communication with the equipment and the air inlet assembly respectively, so that part of the waste gas in the equipment is circulated into the equipment through the air inlet assembly to increase the concentration of the waste gas in the equipment; and the air outlet assembly is in communication with the circulation assembly and outside the workshop respectively, and is used for exhausting another part of the waste gas in the circulation assembly to the workshop. The fresh air device can exhaust the waste gas with high concentration in the equipment to the workshop, exhaust more waste gas in a short time, improve the utilization rate of energy during the operation of the fresh air device, improve the recycling efficiency of the waste gas, and reduce the cost of waste gas treatment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of optical lens processing, and in particular to a fresh air device, an exhaust method and a cleaning device. BACKGROUND

[0002] A polarizing sheet is a component of a liquid crystal display. Cleaning the polarizing sheet during production is a crucial process. The cleaning process generally involves spraying solvent from a solvent tank to clean the surface of the polarizing sheet. However, organic solvents used as cleaning agents are volatile, and their volatilization outside the cleaning device can pose a safety hazard to workers, and in severe cases can cause cancer, fetal malformation, etc. Therefore, the cleaning device needs to be equipped with an exhaust device to exhaust the waste gas to a recycling device outside the workshop during use.

[0003] In the prior art, the cleaning device for cleaning the polarizing sheet includes a housing, a wiping assembly formed of a dust-free cloth, and a spraying assembly for spraying solvent. The spraying assembly sprays organic solvent, and the wiping assembly wipes to clean the polarizing sheet. The conventional cleaning device is equipped with an exhaust device, which mainly includes a fan arranged above the housing to send air in the workshop into the device, and an exhaust pipe arranged on the device to guide the waste gas out of the workshop, thereby completing the exhaust of the waste gas.

[0004] The above exhaust process directly guides the waste gas in the device out, and the concentration of the waste gas in the device is relatively low under continuous guidance, which requires a lot of time and energy to complete the exhaust of the waste gas, and the recovery efficiency of the waste gas is also relatively low, resulting in a high cost of waste gas treatment. At the same time, a large amount of air in the workshop is consumed, causing changes in temperature and humidity in the workshop, and making the working environment unstable. SUMMARY

[0005] The present application provides a fresh air device, an exhaust method and a cleaning device, which solves the problem that in the prior art, when using organic solvents as cleaning agents, the concentration of waste gas is relatively low, the energy consumed to exhaust the waste gas is relatively high, the recovery efficiency of the waste gas is relatively low, the cost of waste gas treatment is too high, a large amount of air in the workshop is consumed, and the working environment in the workshop is unstable.

[0006] To achieve this purpose, the present application adopts the following technical solutions:

[0007] In a first aspect, a fresh air device for discharging exhaust gas in a device out of a workshop, comprising: an air inlet assembly, a circulation assembly, and an air outlet assembly. The air inlet assembly is in communication with the device to continuously blow air into the device; the circulation assembly is in communication with the device and the air inlet assembly respectively, to circulate a part of the exhaust gas in the device into the device through the air inlet assembly to increase the concentration of the exhaust gas in the device; the air outlet assembly is in communication with the circulation assembly and outside the workshop respectively, and the air outlet assembly is used to discharge another part of the exhaust gas in the circulation assembly out of the workshop.

[0008] Optionally, the air inlet assembly comprises: an air inlet fan, an air outlet of the air inlet fan being in communication with the device; an air inlet pipe, in communication with an air inlet of the air inlet fan and the circulation assembly respectively, and the air inlet fan sends a part of the exhaust gas in the circulation assembly into the device through the air inlet pipe.

[0009] Optionally, the air inlet assembly comprises: a filter layer, arranged at the air outlet of the air inlet fan to retain dust in the exhaust gas.

[0010] Optionally, the circulation assembly comprises: a circulation pipe and a circulation fan; the circulation pipe has a first end and a second end, the first end being in communication with the device, and the second end being in communication with the air inlet assembly and the air outlet assembly respectively, and the circulation fan is arranged in the circulation pipe to extract the exhaust gas in the device; and / or the air outlet assembly comprises: an air outlet pipe and an air outlet fan, one end of the air outlet pipe being connected with the air inlet assembly and the circulation assembly, and the other end of the air outlet pipe extending out of the workshop, and the air outlet fan is arranged in the air outlet pipe to discharge the exhaust gas out of the workshop.

[0011] Optionally, the power of the circulation fan is greater than the power of the air inlet assembly to maintain negative pressure in the device; and / or one end of the air outlet pipe extending out of the workshop is used to communicate with a recycling device.

[0012] Optionally, the fresh air device further comprises: a first regulating valve arranged in the air inlet assembly to selectively connect the air inlet assembly with the workshop; and / or a concentration detection member arranged in the device to detect the concentration of the exhaust gas in the device; and / or a differential pressure gauge arranged in the device to detect the air pressure difference between inside and outside the device.

[0013] Optionally, the fresh air device further comprises: a controller, in communication connection with the differential pressure gauge, the concentration detection member, the air inlet assembly, the circulation assembly, and the air outlet assembly respectively, and the controller is configured to adjust the power of the air inlet assembly, the circulation assembly, and the air outlet assembly according to the concentration of the exhaust gas and / or the air pressure difference.

[0014] In a second aspect, an exhaust method is provided for exhausting the equipment by the fresh air device according to any one of the first aspect, the exhaust method comprising: starting the air inlet assembly, the circulation assembly and the air outlet assembly while the equipment is running; obtaining the exhaust concentration in the equipment, and keeping the power of the air inlet assembly, the circulation assembly and the air outlet assembly constant when the exhaust concentration meets the preset condition, otherwise, adjusting the power of the air inlet assembly, the circulation assembly and the air outlet assembly to adjust the exhaust concentration in the equipment. Moreover, the air inlet assembly can re-introduce part of the exhaust into the equipment, and the air consumption of the air inlet assembly in the workshop is reduced, so that the influence of the fresh air device on the working environment in the workshop can be reduced.

[0015] In a third aspect, a cleaning equipment is provided, comprising: a cabinet; a cleaning device arranged in the cabinet for cleaning products; a loading table arranged in the cabinet for placing products; and the fresh air device according to any one of the first aspect, the air inlet assembly of the fresh air device being in communication with the upper side of the cabinet, and the circulation assembly of the fresh air device being in communication with the lower side of the cabinet.

[0016] Optionally, the loading table is provided with air ducts in communication with the circulation assembly and the cabinet respectively; and / or the cleaning equipment further comprises: a branch pipe and a second adjusting valve, the branch pipe being located below the loading table, one end of the branch pipe being in communication with the cabinet, and the other end of the branch pipe being in communication with the circulation assembly, and the second adjusting valve being arranged in the branch pipe to selectively open the branch pipe; or the cleaning equipment further comprises: a sealing cover covering the cleaning device and the loading table, the sealing cover being in communication with the air inlet assembly and the circulation assembly respectively.

[0017] Advantages of the present application:

[0018] In the first aspect, the exhaust generated by the equipment during operation is partially circulated into the equipment by the air inlet assembly and the circulation assembly to increase the exhaust concentration in the equipment, and the other part is discharged from the workshop by the air outlet assembly. During the continuous operation of the equipment, the exhaust concentration discharged from the workshop by the air outlet assembly gradually increases. The fresh air device can discharge the high-concentration exhaust in the equipment from the workshop, thereby discharging more exhaust in a short time, improving the energy utilization rate of the fresh air device during operation, and improving the recovery efficiency of the exhaust, thereby reducing the cost of exhaust treatment.

[0019] In the second aspect, the exhaust method can correspondingly adjust the exhaust concentration in the equipment to discharge exhaust meeting the concentration requirement, thereby improving the exhaust discharge amount per unit time, which is beneficial to improving the exhaust discharge efficiency and the recovery efficiency of the exhaust, so as to reduce the treatment cost of the exhaust.

[0020] In the third aspect, the cleaning device can clean the products on the feeding table and generate waste gas during operation, and the fresh air device can adjust the concentration of the waste gas in the casing to discharge more waste gas per unit time, improve the discharge efficiency of the waste gas, and improve the recycling efficiency of the waste gas, thereby effectively reducing the treatment cost of the waste gas during operation of the cleaning device. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a structural schematic diagram of the cleaning device and the fresh air device in some embodiments of the present application;

[0022] Figure 2 is a flow schematic diagram of the exhaust method in some embodiments of the present application.

[0023] In the drawings:

[0024] 1, air inlet assembly; 10, air inlet fan; 11, air inlet pipe; 12, air baffle; 13, filter layer; 14, first regulating valve; 2, circulating assembly; 20, circulating pipe; 21, circulating fan; 3, air outlet assembly; 30, air outlet pipe; 31, air outlet fan; 4, device; 40, casing; 41, cleaning device; 411, cloth rolling mechanism; 412, dust-free cloth; 413, cleaning head; 42, feeding table; 421, air hole; 422, air duct; 43, branch pipe; 44, second regulating valve; 5, concentration detection piece. DETAILED DESCRIPTION

[0025] The present application will be further described in detail below in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present application, and not to limit the present application. In addition, it should be noted that, in order to facilitate the description, only the parts related to the present application are shown in the drawings, not all the structures.

[0026] In the description of the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0027] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature is "on", "above" and "over" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature. The first feature is "under", "below" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the first feature is lower in horizontal height than the second feature.

[0028] In the description of the present embodiment, the terms "upper", "lower", "right", "left", and other orientation or position relationships are based on the orientation or position relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used to distinguish in description and have no special meaning.

[0029] The present application provides a fresh air device, an exhaust method and a cleaning equipment. The cleaning equipment is used for cleaning work of a polaroid, and when the cleaning equipment uses an organic solvent as a cleaning liquid, more harmful gas, i.e. waste gas, is generated in the cleaning process. The fresh air device arranged on the cleaning equipment can use the exhaust method to adjust the concentration of the waste gas in the cleaning equipment, so as to change the exhaust concentration of the waste gas, so that the exhaust amount of the waste gas per unit time is increased, and the recycling efficiency of the waste gas is improved, thereby effectively reducing the treatment cost of the waste gas. At the same time, the fresh air device can also form a negative pressure in the cleaning equipment to reduce the possibility of the waste gas entering the workshop.

[0030] A fresh air device

[0031] Referring to Figure 1 As shown in the figure, the fresh air device is used for exhausting waste gas in the equipment 4 out of the workshop, and includes an air inlet assembly 1, a circulation assembly 2 and an air outlet assembly 3. The air inlet assembly 1 communicates with the equipment 4 to continuously blow air into the equipment 4; the circulation assembly 2 respectively communicates with the equipment 4 and the air inlet assembly 1, so as to circulate a part of the waste gas in the equipment 4 into the equipment 4 through the air inlet assembly 1, so as to increase the concentration of the waste gas in the equipment 4; the air outlet assembly 3 respectively communicates with the circulation assembly 2 and outside the workshop, and the air outlet assembly 3 is used for exhausting another part of the waste gas in the circulation assembly 2 out of the workshop.

[0032] Specifically, the air inlet assembly 1 can be arranged above the equipment 4, an opening is formed on the top of the equipment 4, the air inlet of the air inlet assembly 1 is communicated with the air outlet of the air inlet assembly 1, and the air exhaust of the air inlet assembly 1 is respectively communicated with the workshop and the circulating assembly 2. A valve can be arranged at the air exhaust of the air inlet assembly 1 to selectively connect the air inlet assembly 1 with the workshop. The circulating assembly 2 is arranged on the side of the equipment 4, one end of the circulating assembly 2 is communicated with the bottom of the equipment 4 through a pipeline, and the other end is communicated with the air inlet assembly 1 and the air outlet assembly 3 through a pipeline. The air outlet assembly 3 extends out of the workshop and is communicated with the recovery equipment away from the circulating assembly 2. The recovery equipment can treat the exhaust gas, for example, use the exhaust gas to generate heat, and further utilize the heat.

[0033] When the fresh air device is running, part of the exhaust gas generated by the equipment 4 during operation is circulated into the equipment 4 by the air inlet assembly 1 and the circulating assembly 2, so as to increase the concentration of the exhaust gas in the equipment 4. Another part of the exhaust gas is discharged out of the workshop through the air outlet assembly 3. During the continuous operation of the equipment 4, the concentration of the exhaust gas discharged out of the workshop through the air outlet assembly 3 will gradually increase. The fresh air device discharges the exhaust gas with high concentration in the equipment 4 out of the workshop, so as to discharge more exhaust gas in a short time, improve the utilization rate of energy when the fresh air device is running, and improve the recovery efficiency of the exhaust gas, thereby reducing the cost of treating the exhaust gas. Moreover, the air inlet assembly 1 can introduce part of the exhaust gas into the equipment 4, and the air consumption of the air inlet assembly 1 in the workshop is reduced, so as to reduce the influence of the fresh air device on the working environment in the workshop.

[0034] In some embodiments of the present application, the air inlet assembly 1 comprises an air inlet fan 10 and an air inlet pipeline 11. The air outlet of the air inlet fan 10 is communicated with the equipment 4. The air inlet pipeline 11 is respectively communicated with the air exhaust of the air inlet fan 10 and the circulating assembly 2. The air inlet fan 10 sends part of the exhaust gas in the circulating assembly 2 into the equipment 4 through the air inlet pipeline 11.

[0035] Specifically, a wind cover 12 can be arranged on the upper part of the equipment 4. The wind cover 12 covers the opening on the top of the equipment 4. The bottom wall of the wind cover 12 is open, and the side wall of the wind cover 12 can be fixed to the top wall of the equipment 4 by welding or bonding. The air inlet fan 10 is arranged in the wind cover 12, and the air exhaust of the air inlet fan 10 faces the opening of the equipment 4. The air inlet fan 10 can adopt a fan filter unit (FFU, Fan Filter Unit). The specific structure of the fan filter unit is known in the art, and will not be described here. The air inlet pipeline 11 is arranged on the upper side of the wind cover 12 along the horizontal direction and is communicated with the wind cover 12 through an air guide pipeline. One end of the air inlet pipeline 11 is communicated with the circulating assembly 2, and the other end can be closed or communicated with the workshop.

[0036] When the air inlet assembly 1 is in operation, the air inlet fan 10 can continuously blow air into the equipment 4, so that the exhaust gas in the equipment 4 gradually enters the circulation assembly 2, and part of the exhaust gas entering the circulation assembly 2 is sucked into the equipment 4 by the air inlet fan 10 through the air inlet pipe 11, so as to effectively increase the concentration of the exhaust gas in the equipment 4. The air inlet fan 10 adopts a fan filter group, which can preliminarily filter the sucked gas and reduce the possibility of impurities entering the equipment 4.

[0037] In some embodiments of the present application, the air inlet assembly 1 comprises a filter layer 13. The filter layer 13 is arranged at the air outlet of the air inlet fan 10 to retain dust in the exhaust gas.

[0038] Specifically, the filter layer 13 is arranged at the lower side opening of the air baffle 12, opposite to the air outlet of the air inlet fan 10, and the filtering precision of the filter layer 13 can be higher than that of the air inlet fan 10. By arranging the filter layer 13, the exhaust gas entering the equipment 4 is further filtered, thereby further reducing the possibility of impurities entering the equipment 4.

[0039] In some embodiments of the present application, the circulation assembly 2 comprises a circulation pipe 20 and a circulation fan 21. The circulation pipe 20 has a first end and a second end, the first end is in communication with the equipment 4, and the second end is in communication with the air inlet assembly 1 and the air outlet assembly 3 respectively. The circulation fan 21 is arranged in the circulation pipe 20, and the circulation fan 21 is used to suck the exhaust gas in the equipment 4.

[0040] Specifically, the circulation pipe 20 is arranged on the side of the equipment 4 and extends in the vertical direction, the lower end of the circulation pipe 20 is the first end and is in communication with the lower side of the equipment 4, and the upper end of the circulation pipe 20 is the second end and is in communication with the air inlet pipe 11 and the air outlet assembly 3 through the three-way valve respectively. The circulation fan 21 is arranged in the circulation pipe 20, the air suction port of the circulation fan 21 faces the first end, and the air outlet port faces the second end.

[0041] When the circulation assembly 2 is in operation, the circulation fan 21 can suck the exhaust gas in the equipment 4 through the circulation pipe 20 and send it into the air inlet pipe 11 and the air outlet assembly 3 through the second end of the circulation pipe 20, then part of the exhaust gas can enter the air baffle 12 through the air inlet pipe 11 and be sent into the equipment 4 by the air inlet fan 10, at this time, the equipment 4 is continuously operated and can continuously generate exhaust gas, and when the air inlet fan 10 sends part of the exhaust gas, the concentration of the exhaust gas in the equipment 4 can be increased. The other part of the exhaust gas can be directly discharged from the workshop through the air outlet assembly 3. In this way, the exhaust gas discharged from the air outlet assembly 3 is continuously circulated, and the concentration of the exhaust gas discharged from the air outlet assembly 3 is increased.

[0042] In some embodiments of the present application, the exhaust assembly 3 comprises an exhaust pipe 30 and an exhaust fan 31. One end of the exhaust pipe 30 is connected with the air inlet assembly 1 and the circulation assembly 2, and the other end of the exhaust pipe 30 extends out of the workshop. The exhaust pipe 30 is used to communicate with the recovery equipment. The exhaust fan 31 is arranged in the exhaust pipe 30 to exhaust the exhaust gas out of the workshop.

[0043] Specifically, one end of the exhaust pipe 30 is communicated with the circulation pipe 20 of the circulation assembly 2, and the other end of the exhaust pipe 30 extends out of the workshop. The recovery equipment is arranged outside the workshop, which can collect and store the exhaust gas exhausted by the exhaust pipe 30. A combustion device can also be arranged to burn the exhaust gas, so as to utilize the heat generated thereby. The type and function of the recovery equipment can be adjusted according to different types of exhaust gas, which is not limited in the present application. The suction port of the exhaust fan 31 faces the circulation pipe 20, and the air outlet of the exhaust fan 31 faces outside the workshop, so as to smoothly exhaust part of the exhaust gas in the circulation pipe 20 out of the workshop.

[0044] When the exhaust assembly 3 is running, the exhaust fan 31 can exhaust the exhaust gas flowing in the circulation pipe 20 into the exhaust pipe 30, and guide the exhaust gas into the recovery equipment outside the workshop through the exhaust pipe 30, so as to timely recover and treat the exhaust gas. The exhaust gas can be reused, and the possibility of polluting the environment by discharging the exhaust gas into the environment can be reduced.

[0045] In some embodiments of the present application, the power of the circulation fan 21 is greater than the power of the air inlet assembly 1, so as to maintain negative pressure in the equipment 4. Specifically, the suction amount of the circulation fan 21 is greater than the suction amount of the air inlet fan 10, so that more gas is exhausted in the equipment 4 per unit time, so that the equipment 4 is in a negative pressure state. At the same time, the exhaust gas amount exhausted by the circulation fan 21 per unit time is less than the sum of the exhaust gas amount generated in the equipment 4 and the exhaust gas amount entering the equipment 4 through the air inlet fan 10, so as to ensure that the concentration of the exhaust gas in the equipment 4 is effectively increased. In this way, the concentration of the exhaust gas is gradually increased without causing leakage of the equipment 4, so as to improve the exhaust efficiency of the fresh air device while ensuring the safety of the equipment 4.

[0046] In some embodiments of the present application, the fresh air device further comprises a first regulating valve 14. The first regulating valve 14 is arranged in the air inlet assembly 1 to selectively communicate the air inlet assembly 1 with the workshop. The first regulating valve 14 is arranged at the end of the air inlet pipe 11 away from the circulation assembly 2, which can be an electromagnetic valve. When the air inlet assembly 1 is running, the first regulating valve 14 adjusts the communication degree between the air inlet fan 10 and the workshop, so as to adjust the amount of air extracted from the workshop by the air inlet fan 10, and reduce the possibility of interfering with the air quality in the workshop during the running of the air inlet fan 10.

[0047] In some embodiments of the present application, the fresh air device further comprises a concentration detection member 5. The concentration detection member 5 is arranged in the equipment 4 to detect the concentration of the exhaust gas in the equipment 4. The concentration detection member 5 can be located in the equipment 4 close to one side of the circulating assembly 2. By detecting the concentration of the exhaust gas entering the circulating assembly 2, it can be determined whether the concentration of the exhaust gas discharged from the equipment 4 meets the requirements, so as to avoid problems in the operation safety of the equipment itself caused by too high concentration of the exhaust gas, and also to avoid the situation that the operation cost of the fresh air device is increased due to too low concentration of the exhaust gas.

[0048] In some embodiments of the present application, the fresh air device further comprises a differential pressure gauge. The differential pressure gauge is arranged in the equipment 4 to detect the pressure difference between the inside and outside of the equipment 4. One end of the differential pressure gauge is arranged in the equipment 4, and the other end is arranged outside the equipment 4, so as to detect the pressure difference between the inside and outside of the equipment 4, and ensure that the pressure difference between the inside and outside of the equipment 4 is maintained within a certain range, which can not only prevent the exhaust gas in the equipment 4 from diffusing to the outside of the equipment 4, but also can make the pressure in the equipment 4 meet the requirements of product cleaning.

[0049] In some embodiments of the present application, the fresh air device further comprises a controller. The controller is in communication connection with the differential pressure gauge, the concentration detection member 5, the air inlet assembly 1, the circulating assembly 2 and the air outlet assembly 3, and the controller is configured to adjust the power of the air inlet assembly 1, the circulating assembly 2 and the air outlet assembly 3 according to the exhaust gas concentration and / or the pressure difference.

[0050] Specifically, the differential pressure gauge and the concentration detection member 5 can be in communication connection with the controller, so as to transmit the detected exhaust gas concentration and pressure difference to the controller in real time. The program and structure set in the controller can correspondingly adjust the air inlet assembly 1, the circulating assembly 2 and the air outlet assembly 3 according to the transmitted data.

[0051] In one embodiment, in a unit time, the air inlet assembly 1 can send an air volume of A into the equipment 4 when it is running, and the exhaust gas concentration contained in the air volume is A1; the circulating assembly 2 can extract an air volume of B from the equipment 4, and the exhaust gas concentration contained in the air volume is B1; the air outlet assembly 3 can discharge an air volume of C, and the exhaust gas concentration contained in the air volume is C1; the exhaust gas generated in the equipment 4 is D, and the pressure is P.

[0052] When the equipment 4 is running, the exhaust gas is continuously generated. Therefore, the air inlet assembly 1 injects an air volume of A into the equipment 4, and the circulating assembly 2 extracts an air volume of B from the equipment 4, which contains exhaust gas with a concentration of B1. Part of the gas extracted by the circulating assembly 2 enters the air inlet assembly 1 and then enters the equipment 4, and the other part enters the air outlet assembly 3 and is discharged from the workshop, that is, part of the exhaust gas extracted by the circulating assembly 2 enters the air inlet assembly 1, and the other part enters the air outlet assembly 3, that is, B1xB= AxA1+CxC1.

[0053] When the controller regulates the power of the air intake assembly 1, the circulating assembly 2 and the exhaust assembly 3, the air intake fan 10 of the air intake assembly 1, the circulating fan 21 of the circulating assembly 2 and the exhaust fan 31 of the exhaust assembly 3 are all variable frequency adjustable fans. When the circulating fan 21 and the air intake fan 10 are started at the same time, the air volume of the circulating fan 21 is greater than the air volume of the air intake fan 10, that is, A < B is ensured, and then the negative pressure can be formed in the equipment 4, and at this time P can be maintained between -1 Pa and -5 Pa.

[0054] When the amount of exhaust gas sent into the equipment 4 by the air intake assembly 1 per unit time plus the amount of exhaust gas generated by the equipment 4 itself is greater than the amount of exhaust gas extracted by the circulating assembly 2, that is, A*A1+D > B*B1, the concentration of exhaust gas in the equipment 4 will increase. Therefore, by increasing the power of the air intake fan 10 or reducing the power of the circulating fan 21 through the controller, the concentration in the equipment 4 can be increased.

[0055] When it is necessary to reduce the concentration of exhaust gas in the equipment 4, the power of the exhaust fan 31 can be increased through the controller, so that C1 increases, and then A1 decreases to reduce the exhaust gas entering the equipment 4 through the air intake fan 10, and the air volume of the circulating fan 21 can be increased, so that B is further greater than A, and when B*B1 > A*A1+D, the concentration of exhaust gas in the equipment 4 can be reduced. Or the first regulating valve 14 can be increased, so that more air enters the equipment through the air intake fan 10, and the exhaust gas will correspondingly decrease, and then the concentration of exhaust gas in the equipment 4 can be reduced, so as to ensure that the concentration in the equipment 4 meets the operation requirements.

[0056] An exhaust method

[0057] Referring to Figure 2 The exhaust method is used for exhausting the equipment 4 through the fresh air device in any of the above embodiments, and the exhaust method comprises the following steps.

[0058] Step S1: starting the air intake assembly 1, the circulating assembly 2 and the exhaust assembly 3 while the equipment 4 is running.

[0059] The running of the equipment 4 means that the polarizer enters the equipment 4, and the product is cleaned by using the organic solvent. When the equipment 4 is running, exhaust gas will continuously be generated in the equipment 4. At the same time when the equipment 4 is running, the air intake assembly 1, the circulating assembly 2 and the exhaust assembly 3 are also running synchronously, so as to timely exhaust the exhaust gas in the equipment 4 out of the workshop.

[0060] Step S2: obtaining the concentration of exhaust gas in the equipment 4, when the concentration of exhaust gas meets the preset condition, keeping the power of the air intake assembly 1, the circulating assembly 2 and the exhaust assembly 3 constant, otherwise, adjusting the power of the air intake assembly 1, the circulating assembly 2 and the exhaust assembly 3 to adjust the concentration of exhaust gas in the equipment 4.

[0061] The preset condition is set artificially after comprehensively considering the cleaning requirements of the reference product, the operation efficiency of the fresh air device, and the recovery efficiency of the exhaust gas. The preset condition mainly judges the exhaust gas concentration in the equipment 4. The exhaust gas concentration cannot interfere with or even damage the cleaning operation of the polaroid. In order to ensure that the fresh air device can operate efficiently and the exhaust gas can be recovered efficiently, the exhaust gas concentration in the equipment 4 needs to be at a relatively high level. At this time, the fresh air device can discharge the most exhaust gas per unit time, and the recovery efficiency is also the highest. When the preset condition is not met, the power between the air inlet assembly 1, the circulating assembly 2, and the air outlet assembly 3 can be adjusted to correspondingly adjust the air volume of the three, and thus change the exhaust gas concentration in the equipment 4.

[0062] Through the above steps S1 and S2, the exhaust gas concentration in the equipment 4 can be correspondingly adjusted to discharge exhaust gas meeting the concentration requirements, thereby improving the exhaust gas discharge amount per unit time, which is beneficial to improve the exhaust gas discharge efficiency and the recovery efficiency of the exhaust gas, so as to reduce the treatment cost of the exhaust gas.

[0063] In some embodiments of the present application, when the exhaust gas concentration is less than the first concentration threshold and greater than the second concentration threshold, it is judged that the exhaust gas concentration meets the preset condition.

[0064] The first concentration threshold and the second concentration threshold are both artificially set exhaust gas concentration reference values. When the exhaust gas concentration is between the first concentration threshold and the second concentration threshold, the operation efficiency of the fresh air device and the recovery efficiency of the exhaust gas are both optimal.

[0065] When the exhaust gas concentration is greater than the first concentration threshold, the exhaust gas concentration in the equipment 4 is too high, which will affect the cleaning operation of the polaroid. At this time, the power of the air outlet assembly 3 is increased by the controller, thereby increasing the exhaust gas discharge amount and reducing the exhaust gas entering the equipment 4 through the air inlet fan 10. At the same time, the air volume of the circulating fan 21 is increased, so that the concentration in the equipment 4 can be reduced to ensure that the concentration in the equipment 4 meets the operation requirements.

[0066] When the exhaust gas concentration is less than the second concentration threshold, the exhaust gas concentration in the equipment 4 is too low, the operation efficiency of the fresh air device is low, and the recovery efficiency of the exhaust gas is also low. At this time, the power of the air inlet fan 10 is increased or the power of the circulating fan 21 is reduced by the controller, so that the exhaust gas amount entering the equipment 4 per unit time plus the exhaust gas amount generated by the equipment 4 itself is greater than the exhaust gas amount extracted by the circulating assembly 2, thereby increasing the concentration in the equipment 4.

[0067] A cleaning device

[0068] Reference Figure 1As shown, the cleaning device includes a cabinet 40, a cleaning device 41, a loading table 42, and a fresh air device as in any of the above embodiments. The cleaning device 41 is arranged in the cabinet 40 for cleaning the product. The loading table 42 is arranged in the cabinet 40 for placing the product. The air inlet assembly 1 of the fresh air device is in communication with the upper side of the cabinet 40, and the circulation assembly 2 of the fresh air device is in communication with the lower side of the cabinet 40.

[0069] Specifically, the top wall of the cabinet 40 is provided with an opening, and the air inlet assembly 1 of the fresh air device is arranged on the top wall and covers the opening. The circulation assembly 2 is located on the side of the cabinet 40 and is in communication with the bottom of the cabinet 40. The loading table 42 is arranged close to the bottom of the cabinet 40, and the cleaning device 41 is located above the loading table 42. The cleaning device includes a cloth winding mechanism 411, a dust-free cloth 412, and a cleaning head 413. The dust-free cloth 412 is wound around the cloth winding mechanism 411 and the cleaning head 413. The cleaning head 413 is arranged opposite to the loading table 42. Multiple polarizing plates can be placed on the loading table 42 at the same time, and the corresponding cleaning device 41 can also be provided with multiple cleaning devices. The specific number can be determined according to the size of the cabinet 40, and the present application is not limited. In one embodiment, two cleaning devices 41 are provided.

[0070] During operation of the cleaning device, the cleaning device 41 cleans the product on the loading table 42 and generates waste gas at the same time. The fresh air device adjusts the concentration of waste gas in the cabinet 40 to discharge more waste gas per unit time, improve the discharge efficiency of waste gas, and also improve the recovery efficiency of waste gas, thereby effectively reducing the processing cost of waste gas during operation of the cleaning device. It should be understood that the cleaning device is one of the devices 4 that can be installed with the above-mentioned fresh air device, and when other types of cleaning devices or other processing devices are needed to process optical lenses, the fresh air device can also be used for gas discharge.

[0071] In some embodiments of the present application, the loading table 42 is provided with an air duct 422 in communication with the circulation assembly 2 and the cabinet 40, respectively.

[0072] Specifically, the loading table 42 places the polarizing plate as the product waiting for cleaning. A plurality of air holes 421 are formed in the top wall of the loading table 42, and the air duct 422 is arranged inside the loading table 42 and in communication with the plurality of air holes 421. One end of the circulating air pipe is in communication with the air duct 422. The diameter of the air hole 421 can be between 30-50 cm, and the number can be between 8-15. The plurality of air holes 421 can be uniformly distributed on the loading table 42. When the product is cleaned, the waste gas can enter the air duct 422 through the air hole 421, and then enter the circulating pipe 20 to circulate or be discharged to the workshop.

[0073] In some embodiments of the present application, the cleaning device further comprises a branch pipe 43 and a second regulating valve 44. The branch pipe 43 is located below the feeding platform 42, one end of the branch pipe 43 is in communication with the casing 40, and the other end is in communication with the circulating assembly 2. The second regulating valve 44 is arranged in the branch pipe 43 to selectively open the branch pipe 43.

[0074] Specifically, there is a gap between the feeding platform 42 and the inner wall of the casing 40, so that the exhaust gas is easily accumulated at the bottom of the casing 40 after being generated. A gas hole is arranged on the side of the casing 40, and the diameter of the gas hole can be between 100-200 cm. One end of the branch pipe 43 is in communication with the gas hole, and the other end is in communication with the circulating pipe 20. The second regulating valve 44 can control the opening or closing of the branch pipe 43.

[0075] When the device 4 is continuously operated for a period of time, the exhaust gas can be accumulated at the bottom wall of the casing 40, and at this time, the exhaust gas is below the feeding platform 42, so that the circulating assembly 2 is difficult to extract the exhaust gas at this position through the air hole 421 and the air duct 422 of the feeding platform 42. By arranging the gas hole and the branch pipe 43, and using the second regulating valve 44 to open the branch pipe 43, the circulating assembly 2 can extract the exhaust gas at this position out of the casing 40, so as to reduce the possibility of exhaust gas remaining in the device 4.

[0076] Second embodiment

[0077] On the basis of the first embodiment, the difference between the present embodiment and the first embodiment is that the cleaning device 41 and the feeding platform 42 are different from the feeding assembly 1 and the circulating assembly 2 in the opening mode.

[0078] In some embodiments of the present application, the cleaning device further comprises a sealing cover. The sealing cover covers the cleaning device 41 and the feeding platform 42, and the sealing cover is in communication with the feeding assembly 1 and the circulating assembly 2, respectively.

[0079] Specifically, a sealing cover is separately arranged in the casing 40, and the cleaning device 41 and the feeding platform 42 are directly arranged in the sealing cover. When feeding or feeding is needed, the sealing cover is opened, and when the cleaning operation starts, the sealing cover remains sealed. An air inlet is arranged at the upper end of the sealing cover, and the air inlet is in communication with the feeding device. An air outlet is arranged at the lower side of the sealing cover, and the circulating assembly 2 is in communication with the air outlet.

[0080] In this way, when the cleaning operation is performed, only exhaust gas is generated in the sealing cover, and the exhaust gas cannot spread into the casing 40, effectively reducing the possibility of exhaust gas leakage. When the feeding assembly 1 and the circulating assembly 2 are started, the feeding assembly 1 directly blows gas into the sealing cover, and the gas in the sealing cover can be discharged from the sealing cover and the casing 40 through the circulating assembly 2, so that the exhaust gas can be smoothly discharged from the workshop.

[0081] Obviously, the above embodiments of the present application are merely exemplary but not intended to limit the embodiments of the present application. Various obvious changes, re-adjustments and substitutions can be made by those skilled in the art without departing from the scope of the present application. It is not necessary or possible to enumerate all the embodiments. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A fresh air device, characterized in that, The fresh air device is used to discharge the exhaust gas in the equipment (4) from the workshop, including: An air inlet assembly (1) is connected to the device (4) to continuously blow air into the device (4); A circulation component (2) is connected to both the device (4) and the air intake component (1) to circulate a portion of the exhaust gas from the device (4) into the device (4) through the air intake component (1), thereby increasing the concentration of exhaust gas in the device (4); and The exhaust assembly (3) is connected to the circulation assembly (2) and the outside of the workshop respectively. The exhaust assembly (3) is used to discharge another part of the waste gas in the circulation assembly (2) into the workshop. During the continuous operation of the equipment (4), the concentration of exhaust gas discharged from the workshop through the exhaust assembly (3) will gradually increase; A hood (12) is provided on the upper part of the device (4), and the hood (12) covers the opening on the top of the device (4).

2. The fresh air device according to claim 1, characterized in that, The air intake assembly (1) includes: An air inlet fan (10) is provided, the air outlet of which is connected to the inside of the device (4); The air inlet pipe (11) is connected to the exhaust port of the air inlet fan (10) and the circulation component (2) respectively. The air inlet fan (10) sends part of the waste gas in the circulation component (2) into the device (4) through the air inlet pipe (11).

3. The fresh air device according to claim 2, characterized in that, The air intake assembly (1) includes: A filter layer (13) is provided at the air outlet of the air inlet fan (10) to retain dust in the exhaust gas.

4. The fresh air device according to claim 1, characterized in that, The circulation component (2) includes: a circulation pipe (20) and a circulation fan (21); the circulation pipe (20) has a first end and a second end, the first end being connected to the device (4), and the second end being connected to the air inlet component (1) and the air outlet component (3) respectively; the circulation fan (21) is disposed inside the circulation pipe (20), and the circulation fan (21) is used to extract the waste gas inside the device (4); and / or The exhaust assembly (3) includes an exhaust pipe (30) and an exhaust fan (31); one end of the exhaust pipe (30) is connected to the air inlet assembly (1) and the circulation assembly (2), and the other end extends out of the workshop; the exhaust fan (31) is installed in the exhaust pipe (30) to discharge waste gas from the workshop.

5. The fresh air device according to claim 4, characterized in that, The power of the circulating fan (21) is greater than the power of the air inlet assembly (1) so that negative pressure is maintained inside the device (4); and / or The exhaust pipe (30) extends out of one end of the workshop for connection with the recycling equipment.

6. The fresh air device according to any one of claims 1 to 5, characterized in that, The fresh air system also includes: A first regulating valve (14) is disposed on the air inlet assembly (1) to selectively connect the air inlet assembly (1) to the workshop; and / or A concentration detection element (5) is installed inside the device (4) to detect the concentration of exhaust gas inside the device (4); and / or A differential pressure gauge is installed in the device (4) to detect the pressure difference inside and outside the device (4).

7. The fresh air device according to claim 6, characterized in that, The fresh air system also includes: The controller is communicatively connected to the differential pressure gauge, the concentration detection element (5), the air intake assembly (1), the circulation assembly (2) and the exhaust assembly (3), respectively. The controller is configured to adjust the power of the air intake assembly (1), the circulation assembly (2) and the exhaust assembly (3) according to the exhaust gas concentration and / or the air pressure difference.

8. A method for venting exhaust, characterized in that, The device (4) is vented by the fresh air device according to any one of claims 1 to 7, the venting method comprising: While the device (4) is running, the air intake assembly (1), the circulation assembly (2), and the exhaust assembly (3) are activated; The concentration of exhaust gas in the device (4) is obtained. When the concentration of exhaust gas meets the preset conditions, the power of the air intake component (1), the circulation component (2) and the exhaust component (3) is kept constant. Otherwise, the power of the air intake component (1), the circulation component (2) and the exhaust component (3) is adjusted to adjust the concentration of exhaust gas in the device (4).

9. A cleaning device, characterized in that, include: Casing (40); A cleaning device (41) is disposed inside the housing (40) for cleaning the product; A loading platform (42) is set inside the housing (40) to place products; as well as According to any one of claims 1 to 7, the air intake assembly (1) of the fresh air device is connected to the upper side of the housing (40), and the circulation assembly (2) of the fresh air device is connected to the lower side of the housing (40).

10. The cleaning equipment according to claim 9, characterized in that, The loading platform (42) is provided with air ducts (422) that communicate with the circulation component (2) and the housing (40); and / or The cleaning equipment further includes: a branch pipe (43) and a second regulating valve (44); the branch pipe (43) is located below the loading platform (42), one end of the branch pipe (43) is connected to the housing (40), and the other end is connected to the circulation component (2), and the second regulating valve (44) is provided on the branch pipe (43) to selectively conduct the branch pipe (43); or the cleaning equipment further includes: a sealing cover, which covers the cleaning device (41) and the loading platform (42), and the sealing cover is connected to the air inlet component (1) and the circulation component (2) respectively.

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