Efficient air filter

Abstract

The utility model discloses a high-efficiency air filter which comprises a device main body, an anti-explosion valve, an air volume measuring pipe and a centrifugal fan, ventilation pipelines are arranged at connectors on the two sides of the device body respectively, the centrifugal fan is located on one side of the device body, the anti-explosion valve is located on the side close to the air inlet, the air volume measuring pipe is located on the side close to the centrifugal fan, and the anti-explosion valve and the air volume measuring pipe are installed through pipelines. The device main body comprises a filter mounting shell, a mounting frame, a combined filter and a pneumatic airtight butterfly valve; the filter installation shell is located at the upper end of the installation frame, the combined filter is located in the filter installation shell, and the pneumatic airtight butterfly valves are located at inlets and outlets in the two sides of the filter installation shell respectively. Outdoor fresh air sequentially passes through the anti-explosion valve, the pneumatic airtight butterfly valve, the combined filter, the pneumatic airtight butterfly valve and the air volume measuring pipe, and finally passes through the centrifugal fan to be fed into a protection area. The air filter is simple and convenient to operate and manage, and the filtering efficiency of the air filter is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of air filtration, in particular to a high-efficiency air filter. Background Art

[0002] Air filters are frequently used in industrial production and human life. Their function is to filter out particulate matter in the air by mechanical methods and provide clean air for downstream machines, production and living environments. Especially on ships, the air quality inside the ship directly affects the personal safety of the people on board. For soldiers on warships, long-term missions at sea will result in the air quality inside the cabin often needing to be renewed.

[0003] However, currently, air filtration work mostly requires manual monitoring. For example, the degree of use of the filter element cannot be monitored in time, and timely replacement will directly affect the air quality in the cabin. Summary of the invention

[0004] The utility model provides a high-efficiency air filter, which solves the problems that the existing air filtering operation is cumbersome and the use degree of the filter element in the air filter cannot be monitored in time, thus affecting the safety of personnel and the environment.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-efficiency air filter, comprising a device body, an explosion-proof valve, an air volume measuring tube and a centrifugal fan;

[0006] Ventilation ducts are respectively arranged at the interfaces on both sides of the device body, the centrifugal fan is located on one side of the device body, the ventilation duct opening on the side excluding the centrifugal fan is an air inlet, an air outlet is arranged at the upper end of the centrifugal fan, the explosion-proof valve is located on the side close to the air inlet, the air volume measuring tube is located on the side close to the centrifugal fan, and the explosion-proof valve and the air volume measuring tube are installed in pipelines;

[0007] The device body includes a filter installation shell, a mounting frame, a combined filter and a pneumatic airtight butterfly valve; the filter installation shell is located at the upper end of the mounting frame, the combined filter is located inside the filter installation shell, and the pneumatic airtight butterfly valve is respectively located at the inlet and outlet on both sides of the filter installation shell. The pneumatic airtight butterfly valve can control the opening and closing of the ventilation system, and can adjust the system air volume together with the fan inverter;

[0008] The outdoor fresh air will be sent into the protection area through the explosion-proof valve, combined filter, pneumatic airtight butterfly valve, air volume measuring tube, and finally through the centrifugal fan.

[0009] Preferably, the combined filter includes a primary filter and a high-efficiency filter, and the primary filter is located on the side close to the air inlet, and the high-efficiency filter is located on the side close to the centrifugal fan, and the two are installed in series, and the primary filter and the high-efficiency filter are effectively positioned and sealed by the filter mounting shell. The primary filter and the high-efficiency filter are used to filter out aerosols entering the cabin, the primary filter is used to filter out large particles of dust larger than 5μm, and the high-efficiency filter is used to filter out remaining aerosols, and the filtration efficiency is not less than 99.999%. The primary filter plays a role in protecting the high-efficiency filter and extending the service life of the high-efficiency filter; the high-efficiency filter determines the filtering effect of the overall device.

[0010] Preferably, reducers are provided at both ends of the filter mounting shell, and the primary filter and the high efficiency filter are compressed and sealed by a slow wheel compression structure, which is convenient for replacement and installation and meets the bag-in-bag-out replacement method.

[0011] Preferably, an electrical control box is provided at the upper end of the filter mounting shell, and an electrical control box and a fan inverter box are provided inside the electrical control box. The electrical control box and the fan inverter box are integrated in the electrical control box to display the working status of the equipment and process parameters such as air volume and resistance, realize equipment start and stop and alarm, manual control operation, and transmit data and signals to the regional defense monitoring system.

[0012] Preferably, two sets of differential pressure transmitters are provided inside the main body of the device, and the static pressure differences upstream and downstream of the primary filter and the high efficiency filter are monitored respectively by the differential pressure transmitters.

[0013] Preferably, a vibration isolator is provided at the lower end of the mounting frame, and the device body and the lower end of the centrifugal fan are connected to the hull through the vibration isolator.

[0014] Preferably, the air volume measuring tube includes a mounting flange, a middle pipe and an air volume measuring meter. The mounting flange is located on both sides of the middle pipe and is connected to the ventilation ducts on both sides through the mounting flange. The air volume measuring meter is located at the upper end of the middle pipe in the middle. The ventilation volume of the device is measured by the air volume measuring tube, and the collected data is transmitted to the electrical control box, which adjusts the fan inverter according to the data.

[0015] Compared with the prior art, the utility model has the following beneficial effects: In the utility model, the operation management and operation are simple and convenient, and the information design of the high-efficiency air filter prototype includes the electric control box control process software design and the first-level reinforced wide-temperature human-machine interface design, so as to realize the functions of the high-efficiency air filter prototype. The high-efficiency air filter prototype has automatic and manual control modes, and the equipment can be started and stopped in the automatic control mode; the equipment has the function of monitoring and displaying process parameters such as working status and air volume, and has the alarm function of exceeding the filter resistance; the equipment has the communication function, and the electric control box has the function of receiving control instructions of regional defense monitoring, and has the function of sending automatic start signals to the relay fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

[0017] In the attached picture:

[0018] Figure 1 It is the general assembly drawing of the utility model equipment;

[0019] Figure 2 It is a schematic diagram of the main structure of the utility model device;

[0020] Figure 3 This is the principle diagram of the electric control box of the utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the air volume measuring tube of the utility model;

[0022] Figure 5 It is a structural schematic diagram of the explosion-proof valve of the utility model;

[0023] Figure 6 It is a structural schematic diagram of the centrifugal fan of the utility model;

[0024] Figure 7 This is the control flow chart of the utility model high efficiency air filter;

[0025] Numbers in the figure: 1. Device body; 101. Filter installation shell; 102. Electrical control box; 103. Mounting frame; 104. Primary filter; 105. High efficiency filter; 2. Explosion-proof valve; 3. Air volume measuring tube; 301. Air volume measuring meter; 302. Middle pipe; 303. Mounting flange; 4. Pneumatic airtight butterfly valve; 5. Centrifugal fan; 6. Air inlet; 7. Air outlet. DETAILED DESCRIPTION

[0026] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0027] Example: Figure 1-Figure 6 As shown, a high efficiency air filter comprises a device body 1, an explosion-proof valve 2, an air volume measuring tube 3 and a centrifugal fan 5;

[0028] Ventilation ducts are respectively provided at the interfaces on both sides of the device body 1, the centrifugal fan 5 is located on one side of the device body 1, the ventilation duct opening on the side excluding the centrifugal fan 5 is an air inlet 6, an air outlet 7 is provided at the upper end of the centrifugal fan 5, the explosion-proof valve 2 is located on the side close to the air inlet 6, the air volume measuring tube 3 is located on the side close to the centrifugal fan 5, and the explosion-proof valve 2 and the air volume measuring tube 3 are pipeline-mounted, the air volume measuring tube 3 includes a mounting flange 303, a middle pipeline 302 and an air volume measuring meter 301, the mounting flange 303 is located on both sides of the stainless steel middle pipeline 302, and is connected to the ventilation ducts on both sides through the mounting flange 303, the air volume measuring meter 301 is located at the upper end of the middle pipeline 302 in the middle, the ventilation volume of the device is measured by the air volume measuring tube 3, and the collected data is transmitted to the electric control box, and the electric control box adjusts the fan frequency converter according to the data;

[0029] The device body 1 includes a filter installation shell 101, a mounting frame 103, a combined filter and a pneumatic airtight butterfly valve 4; an electrical control box 102 is provided at the upper end of the filter installation shell 101, and an electrical control box and a fan inverter box are provided inside the electrical control box 102. The electrical control box and the fan inverter box are integrated in the electrical control box 102, and are used to display the working status of the equipment and process parameters such as air volume and resistance, realize equipment start and stop and alarm, manual control operation, and are used to transmit data and signals to the regional defense monitoring system. The filter installation housing 101 is located at the upper end of the installation frame 103, and the four installation frames 103 are located at the bottom of the device body 1, which are formed by intermittent welding. The combined filter is located inside the filter installation housing 101, and the pneumatic airtight butterfly valve 4 is respectively located at the inlet and outlet on both sides of the filter installation housing 101. The pneumatic airtight butterfly valve 4 can control the opening and closing of the ventilation system, and can adjust the system air volume together with the fan inverter; through the pneumatic airtight butterfly valve 4, a closed space is formed, and the air flow rate of 3.4m 3 / h, the internal overpressure value is ≥1000Pa, the air tightness of the device is qualified, that is, the leakage coefficient is ≤0.1%, the lower end of the mounting frame 103 is provided with a vibration isolator, the lower ends of the device body 1 and the centrifugal fan 5 are connected to the hull through the vibration isolator, and the device body 1 and the centrifugal fan 5 can be installed independently;

[0030] The combined filter includes a primary filter 104 and a high-efficiency filter 105, and the primary filter 104 is located on the side close to the air inlet 6, and the high-efficiency filter 105 is located on the side close to the centrifugal fan 5. The two are installed in series, and the primary filter 104 and the high-efficiency filter 105 are effectively positioned and sealed by the filter installation shell 101. The primary filter 104 and the high-efficiency filter 105 are used to filter out aerosols entering the cabin. The primary filter 104 is used to filter out large particles of dust above 5μm, and the high-efficiency filter 105 is used to filter out the remaining aerosols. The filtration efficiency is not less than 99.999%. The primary filter 104 plays a role in protecting the high-efficiency filter 105 and extending the service life of the high-efficiency filter 105; the high-efficiency filter 105 determines the filtering effect of the entire device; and two sets of differential pressure transmitters are provided inside the device body 1, and the static pressure difference between the upstream and downstream of the primary filter 104 and the high-efficiency filter 105 is monitored respectively by the differential pressure transmitter;

[0031] Among them, reducers are provided at both ends of the filter installation housing 101, and the primary filter 104 and the high efficiency filter 105 are compressed and sealed by a slow wheel compression structure, which is convenient for replacement and installation, and meets the bag-in-bag-out replacement mode;

[0032] The outdoor fresh air will be sent into the protection area through the explosion-proof valve 2, the combined filter, the pneumatic airtight butterfly valve 4, the air volume measuring tube 3, and finally through the centrifugal fan 5 in sequence.

[0033] Among them, in this embodiment:

[0034] Primary filter 104 selection ZC series standard product, product model specification is ZC 610×610×50, rated air volume 3400m 3 / h;

[0035] High efficiency filter 105 selection VN series standard products, product model specification selected is VN 610×610×292, rated air volume 3400m 3 / h;

[0036] The material of the electric control box is 316L stainless steel;

[0037] The inverter is MD290T5.5GB type, and the pneumatic airtight butterfly valve 4 is D641J / H10RL type;

[0038] The differential pressure transmitter used is MDM3051, which is used to detect the resistance value of the primary filter 104 and the high efficiency filter 105;

[0039] The explosion-proof valve 2 is HDB650×650 type, and the valve seat material is stamped 316L stainless steel plate.

[0040] The centrifugal fan 5 is of FDHF-Z450A type, which has a frequency conversion adjustment function and runs stably and reliably. In addition, a vibration isolator is provided on the base, which can be installed independently.

[0041] When doing specific operations:

[0042] The high-efficiency air filter has three modes: local automatic, manual and remote control to realize the start and stop of the equipment. The control process of the software is that when the power is turned on, turn the power button on the front panel, all data bits are reset, and the relay fan signal is turned on at the same time. The PLC monitors the 24V power supply, 220V power supply, the start and stop status of the fan, and displays whether the power is connected by the on and off of the indicator light. The PLC monitors the data of the differential pressure transmitter and the multi-parameter flow transmitter, and uploads it to the human-computer interaction interface and the host computer. When the filter resistance collected by the PLC module exceeds 1000Pa, an audible and visual alarm is issued.

[0043] The program determines the position of the manual / local automatic / remote control switch button and performs control and operation under the relevant program:

[0044] (1) If it is in the manual position, the opening and closing of the pneumatic airtight butterfly valve 4 at the inlet and outlet are controlled by manual adjustment. The program determines whether the pneumatic airtight butterfly valve 4 is fully opened and alarms for abnormal situations. Press the manual inverter (+) and (-) start and stop buttons on the front panel to manually adjust the inverter frequency to increase or decrease the frequency of the variable frequency fan.

[0045] (2) If the knob is in the local automatic position, it is necessary to operate the buttons on the front panel of the electric control box. The operator presses the one-button start and stop button of the fan, and the PLC automatically opens the pneumatic airtight butterfly valve 4. Then, by monitoring the air volume in the pipeline, the frequency of the inverter is PID-adjusted to control the air volume. When the resistance exceeds the limit, an audible and visual alarm is issued, and an alarm message is displayed on the human-machine interface to prompt the replacement of the combined filter. Silencing and resetting are achieved by the light alarm silencing button.

[0046] (3) If the knob is in the remote control position, after receiving the opening command from the host computer, the PLC module in the electric control box controls the intermediate relay to open the two pneumatic airtight butterfly valves 4, and then monitors the air volume in the pipeline and performs PID adjustment on the frequency of the inverter to control the air volume. After receiving the closing command, the PLC module in the electric control box controls the fan to be turned off and the two pneumatic airtight butterfly valves 4 to be closed. When the filter resistance collected by the PLC module exceeds 1000Pa, an audible and visual alarm is issued, and the alarm information is displayed on the host computer. The high-efficiency air filter control flow chart is shown in the figure below. Figure 7 shown.

[0047] Among them, this application also has:

[0048] Monitoring and alarm function: After the high-efficiency air filter is running, the output frequency of the inverter is controlled according to the collected air volume value, and then the wind speed of the fan is controlled. It can monitor the status and resistance value of the pneumatic valve in real time. When the resistance exceeds the standard, an alarm signal is issued.

[0049] Communication function, the high-efficiency air filter has the function of transmitting the operating status, alarm signal, etc. The electric control box has the function of receiving the control command of the regional defense monitoring box and sending the automatic start signal to the relay fan. The electric control box has its own human-machine interaction interface, which is located on the outer wall of the electric control box 102 and can realize the real-time communication between the PLC and the human-machine interaction interface.

[0050] Among them, the filter element of the high-efficiency air filter prototype will retain a large amount of nuclear, biological and chemical gas aerosols after use in wartime. It is inconvenient to replace and easily causes secondary pollution, affecting the safety of personnel and the environment. In the overall design of the device, the safety and convenience of filter element replacement are fully considered. A boss is set at the filter element installation inlet and outlet to meet the needs of the filter element entering and exiting the device body 1 when disassembling and assembling, and the filter element packaging bag can be covered with the boss to form a relatively closed space to prevent toxic and harmful leakage.

[0051] Finally, it should be noted that the above description is only a preferred example of the present utility model and is not intended to limit the present utility model. Although the present utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A high efficiency air filter, Features: It includes a device body, an explosion-proof valve, an air volume measuring tube and a centrifugal fan; Ventilation ducts are respectively arranged at the interfaces on both sides of the device body, the centrifugal fan is located on one side of the device body, the ventilation duct opening on the side excluding the centrifugal fan is an air inlet, an air outlet is arranged at the upper end of the centrifugal fan, the explosion-proof valve is located on the side close to the air inlet, the air volume measuring tube is located on the side close to the centrifugal fan, and the explosion-proof valve and the air volume measuring tube are installed in pipelines; The device body comprises a filter installation shell, a mounting frame, a combined filter and a pneumatic airtight butterfly valve; the filter installation shell is located at the upper end of the mounting frame, the combined filter is located inside the filter installation shell, and the pneumatic airtight butterfly valve is respectively located at the inlet and outlet on both sides of the filter installation shell; The outdoor fresh air will be sent into the protection area through the explosion-proof valve, combined filter, pneumatic airtight butterfly valve, air volume measuring tube, and finally through the centrifugal fan.

2. A high efficiency air filter according to claim 1, Features: The combined filter includes a primary filter and a high-efficiency filter, and the primary filter is located on the side close to the air inlet, and the high-efficiency filter is located on the side close to the centrifugal fan. The two are installed in series, and the primary filter and the high-efficiency filter are effectively positioned and sealed by the filter installation shell.

3. A high efficiency air filter according to claim 2, Features: Both ends of the filter installation shell are provided with reducing pipes, and the primary filter and the high efficiency filter are compressed and sealed by a slow wheel compression structure.

4. A high efficiency air filter according to claim 3, Features: An electrical control box is provided at the upper end of the filter mounting shell, and an electrical control box and a fan inverter box are provided inside the electrical control box. The electrical control box and the fan inverter box are integrated in the electrical control box to display the working status of the equipment and the air volume and resistance process parameters, realize equipment start and stop and alarm, manual control operation, and transmit data and signals to the regional defense monitoring system.

5. A high efficiency air filter according to claim 4, Features: Two sets of differential pressure transmitters are arranged inside the main body of the device, and the static pressure difference between the upstream and downstream of the primary filter and the high efficiency filter is monitored respectively through the differential pressure transmitters.

6. A high efficiency air filter according to claim 1, Features: A vibration isolator is arranged at the lower end of the mounting frame, and the device body and the lower end of the centrifugal fan are connected to the hull through the vibration isolator.

7. A high efficiency air filter according to claim 1, Features: The air volume measuring tube includes a mounting flange, a middle pipe and an air volume measuring meter. The mounting flange is located on both sides of the middle pipe and is connected to the ventilation pipes on both sides through the mounting flange. The air volume measuring meter is located at the upper end of the middle pipe in the middle, and the ventilation volume of the device is measured through the air volume measuring tube.

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