Active circulation air cooling and filtering equipment

Abstract

The utility model discloses an active circulating air heat dissipation filtering device which comprises a frequency conversion cabinet body, an air inlet and an air outlet are formed in the frequency conversion cabinet body, a fan used for inputting air into the frequency conversion cabinet body is arranged on the frequency conversion cabinet body, and an air outlet of the fan is connected with the air inlet of the frequency conversion cabinet body. The electrostatic filter screen and the coarse filter screen are fixedly connected to the fan and cover an air inlet of the fan, the electrostatic filter screen is in insulation contact with the fan and the coarse filter screen, the coarse filter screen is located on the outer side of the electrostatic filter screen, the electrostatic generation power source is electrically connected with the electrostatic head, and the electrostatic head is electrically connected with the electrostatic filter screen; according to the utility model, air can be input into the frequency conversion cabinet body through the fan, and active convection heat dissipation in the frequency conversion cabinet body can be realized; the coarse filter screen can be used for filtering suspended pollutants with the diameter of more than 20 microns, such as dust, hair, flying catkins, cilia and the like; the electrostatic filter screen can filter suspended pollutants with the diameter smaller than 20 microns, and particularly adsorb suspended particles within the range of 5 microns, 2 microns and even submicrons, so that dust accumulation in the frequency conversion cabinet is avoided.

Description

Technical Field

[0001] The utility model relates to active circulating air heat dissipation filtering equipment, belonging to the technical field of heat dissipation of frequency conversion cabinets. Background Art

[0002] The filter backwashing process includes three steps: air flushing, water flushing, and air-water mixed flushing. The air source for the air flushing and air-water mixed flushing steps is continuously and stably delivered by the air source fan (the air source fan refers to the fan used to output the air source, to distinguish it from the fan used for subsequent cooling). The fans currently used to deliver the air source include magnetic suspension fans, air suspension fans, and screw blowers. Moreover, the fans currently used in this process have gradually been improved from the traditional independent control cabinet and fan body to an integrated fan. The frequency converter cabinet has a built-in frequency converter, and the frequency converter is electrically connected to the fan. The frequency converter controls the motor speed of the fan by changing the output frequency in real time, thereby maintaining the reliability and stability of the backwashing system.

[0003] The inverter cabinet contains a large number of electrical components, which will generate a lot of heat when working. The heat dissipation method of heat conduction on the cabinet surface cannot dissipate the heat in time. The heat that is not dissipated in time will cause the temperature inside the inverter cabinet to rise. When the temperature is higher than the upper limit of the safe working temperature of the electrical components, the electrical components will be damaged. Therefore, in addition to the heat dissipation method of heat conduction on the cabinet surface, other heat dissipation functions need to be set for the inverter cabinet to accelerate heat dissipation. The existing inverter cabinet accelerates heat dissipation by opening through holes on the cabinet body with the help of air convection. However, in this cooling method, the circulation of cooling air completely depends on almost static air heat exchange, which may cause insufficient cooling of the inverter cabinet. Therefore, in summer, the inverter cabinet often overheats or shuts down. In addition, the external airflow carries dust particles, and the electrical components inside the inverter cabinet will have a significant adsorption effect on dust due to static electricity, so dust is easily deposited on the surface of the electrical components inside the inverter cabinet. The deposited dust will hinder the conduction of heat from the electrical components to the air. Therefore, it is necessary to improve the heat dissipation function of the existing inverter cabinet. Utility Model Content

[0004] The technical problem to be solved by the utility model is that the heat dissipation rate of the existing frequency conversion cabinet is still slow and dust particles are deposited on the internal electrical components.

[0005] The technical problem to be solved by the utility model is achieved by adopting the following technical solutions:

[0006] Solution 1: An active circulating air cooling and filtering device, comprising a frequency conversion cabinet, the frequency conversion cabinet having an air inlet and an air outlet, and further comprising:

[0007] A fan for inputting air into the frequency conversion cabinet, wherein the air outlet of the fan is connected to the air inlet of the frequency conversion cabinet;

[0008] An electrostatic filter and a coarse filter are fixedly connected to the fan and cover the air inlet of the fan, the electrostatic filter is insulated from the fan and the coarse filter, and the coarse filter is located outside the electrostatic filter

[0009] The static electricity generating element comprises a static electricity head and a static electricity generating power source, wherein the static electricity generating power source is electrically connected to the static electricity head, and the static electricity head is electrically connected to the static electricity filter.

[0010] As a preferred technical solution of this scheme, the coarse filter screen is filter paper.

[0011] It has a good filtering effect on dust, hair, flying catkins, cilia and other suspended pollutants above 20um, and the filter paper cost is low.

[0012] As a preferred technical solution of this scheme, the filter paper is folded into a wave shape and covered on the air inlet of the fan. The filter paper is in a wave shape, which can improve the mechanical strength of the filter paper and increase the filtering area of ​​the filter paper.

[0013] As a preferred technical solution of this scheme, the electrostatic filter is an electrostatic electret polyacrylic acid filter. The polyacrylic acid filter has good electrostatic adsorption effect, low cost and simple replacement operation.

[0014] As a preferred technical solution of this scheme, the fan is fixedly connected to the frequency conversion cabinet, the fan covers the air inlet of the frequency conversion cabinet, and the air outlet of the fan is located inside the frequency conversion cabinet. The fan is directly fixed on the frequency conversion cabinet, and no additional mounting frame is required, which is convenient for installation.

[0015] As a preferred technical solution of the present scheme, an installation groove surrounding the air inlet is provided on the panel of the fan, and the electrostatic filter, coarse filter and grille are installed in the installation groove from the inside to the outside in sequence, and the grille is fixedly connected to the panel of the fan and presses the electrostatic filter and the coarse filter. By pressing the electrostatic filter and the coarse filter with the grille, firstly, the electrostatic filter and the coarse filter themselves can be prevented from being damaged, and secondly, the grille is pressed along the four sides of the electrostatic filter and the coarse filter, and the fixing effect is good, and the electrostatic filter and the coarse filter will not fall off easily. At the same time, it can also ensure that the electrostatic filter and the coarse filter remain in a stretched state, and will not be wrinkled or uncovered due to partial shedding.

[0016] As a preferred technical solution of this scheme, the fan is powered by a frequency conversion cabinet power supply. The fan and the air source fan can be turned on and off synchronously, which is convenient to use.

[0017] As a preferred technical solution of this scheme, the frequency conversion cabinet has at least two air outlets, which are respectively opened on the top and side of the frequency conversion cabinet body, which is conducive to the smooth and sufficient dissipation of hot air flow.

[0018] The beneficial effects of the utility model are:

[0019] The utility model can input air into the frequency conversion cabinet by setting a fan, and can realize active convection heat dissipation inside the frequency conversion cabinet, thereby improving the heat dissipation efficiency. The utility model sets a coarse filter, which can filter suspended pollutants with a diameter of more than 20um, such as dust, hair, flying catkins, and cilia; the electrostatic filter can filter suspended pollutants with a diameter of less than 20um, especially adsorbing suspended particles in the range of 5um, 2um, and even submicron, to avoid dust accumulation in the frequency conversion cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0021] Figure 2 It is a schematic diagram of the connection structure of the fan, electrostatic filter, coarse filter, grid bars and other components;

[0022] Figure 3 for Figure 2 A schematic diagram of the structure enlargement in the middle;

[0023] Figure 4 It is a schematic diagram of the connection structure of the screen frame, electrostatic filter and electrostatic head.

[0024] In the figure: 1. frequency conversion cabinet; 101. air inlet; 2. fan; 201. panel; 202. installation slot; 3. electrostatic filter; 4. coarse filter; 5. grille; 6. screen frame; 7. electrostatic head. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, objectives and effects of the present invention easier to understand, the present invention is further described below in conjunction with specific embodiments.

[0026] In the description of the present invention, it should be understood that the terms "lateral", "longitudinal", "end", "edge", "sidewall", "up", "down", "upper part", "lower part", "directly above", "surface", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", "end", "head" and "tail" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the technical solution of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0027] like Figure 1As shown, the present embodiment provides an active circulating air heat dissipation and filtering device, including a frequency conversion cabinet 1, which has various shapes, usually rectangular. For ease of description, the present invention takes a rectangular frequency conversion cabinet 1 as an example. An air inlet and an air outlet 101 are provided on the frequency conversion cabinet 1. External air flows into the interior of the frequency conversion cabinet 1 from the air inlet, and the hot air inside the frequency conversion cabinet 1 is discharged from the air outlet 101 to achieve cooling. The air outlet 101 is covered with grille bars 5. The shapes of the air inlet and the air outlet 101 are not limited by the present invention.

[0028] Fan 2 can be purchased from existing equipment, and preferably an axial flow fan 2 with a rated voltage of 220v and a power of 50W. Fan 2 uses a micro motor as a driving device. The air outlet 101 end of fan 2 is connected to the air inlet of the frequency conversion cabinet 1. When fan 2 is turned on, fan 2 inhales cold air and discharges it into the frequency conversion cabinet 1 through the air inlet of the frequency conversion cabinet 1 to achieve active air circulation, accelerate air convection, and improve heat dissipation efficiency. Fan 2 does not exceed 6 hours a day, and runs for about 80 minutes at intervals of 4 hours. It is very safe to use and has a long service life.

[0029] There are three ways to connect the fan 2 to the frequency conversion cabinet 1:

[0030] First, the fan 2 is independently arranged outside the frequency conversion cabinet 1, and the air outlet 101 of the fan 2 is connected to the air inlet of the frequency conversion cabinet 1 through a connecting pipe.

[0031] Second, the fan 2 is fixedly connected to the frequency conversion cabinet 1, and the air outlet 101 of the fan 2 is connected to the air inlet of the frequency conversion cabinet 1 through a connecting pipe.

[0032] Third, the fan 2 is fixedly connected to the frequency conversion cabinet 1, the fan 2 covers the air inlet of the frequency conversion cabinet 1, and the air outlet 101 of the fan 2 is located inside the frequency conversion cabinet 1. The third connection method is preferred, which does not require an additional mounting frame or an additional connecting pipe, and is easy to install.

[0033] The panel 201 of the fan 2 is provided with a mounting groove 202, and the mounting groove 202 surrounds the air inlet of the fan 2. The electrostatic filter 3, the coarse filter 4 and the grid bars 5 are sequentially installed in the mounting groove 202 from the inside to the outside, so that the electrostatic filter 3 and the coarse filter 4 cover the air inlet of the fan 2. The grid bars 5 press the electrostatic filter 3 and the coarse filter 4 and the grid bars 5 are fixedly connected to the panel 201 of the fan 2 by bolts, so that the electrostatic filter 3 and the coarse filter 4 are fixed to the panel 201 of the fan 2.

[0034] The coarse filter 4 is used to filter suspended pollutants with a diameter of more than 20um, such as dust, hair, flying catkins, and cilia. The coarse filter 4 can be made of non-woven fabric or filter cotton, or filter paper. If filter paper is used, the filter paper can be folded into a wave shape and covered on the air inlet of the fan 2. The filter paper folded into a wave shape can also improve the mechanical strength of the filter paper, and at the same time, the interception area of ​​the filter paper can be larger.

[0035] The electrostatic filter 3 can be a polyacrylic acid filter, and a mesh frame 6 made of insulating material is fixedly connected to the four sides of the polyacrylic acid filter. When the electrostatic filter 3 is installed in the installation groove 202, the mesh frame 6 replaces the electrostatic filter 3 and contacts the coarse filter 4 and the fan 2 panel 201. The insulating material can be insulating ceramic. The electrostatic generating element includes an electrostatic generating power supply and an electrostatic head 7, and the electrostatic head 7 is electrically connected to the electrostatic filter 3 to generate static charge on the electrostatic filter 3. The electrostatic generating power supply can use the power supply inside the frequency conversion cabinet. The electrostatic filter 3 can use a polyacrylic acid filter to achieve electrostatic adsorption of suspended pollutants with a diameter less than 20um, especially adsorption of suspended particles in the range of 5um, 2um or even submicron. It can achieve a high capture efficiency with low energy consumption, and at the same time has the advantages of low wind resistance of electrostatic dust removal, but does not need to be connected to an external voltage of tens of thousands of volts, so it will not produce ozone, and because it is composed of polypropylene material, it is very convenient to discard and dispose.

[0036] When the fan 2 is arranged on the frequency conversion cabinet 1 , the air outlet 101 of the fan 2 faces the air inlet of the frequency conversion cabinet 1 , and the air is poured into the frequency conversion cabinet 1 , thereby realizing active circulation of the air inside the frequency conversion cabinet 1 .

[0037] When the fan 2 is arranged inside the frequency conversion cabinet 1, the air outlet surface of the fan 2 can face any direction to realize active circulation of the air inside the frequency conversion cabinet 1. However, when the air inlet surface of the fan 2 faces the air inlet, the air can also effectively enter from the air inlet and exit from the air outlet 101.

[0038] In some embodiments, the fan 2 is powered by the power supply in the frequency conversion cabinet, and the power supply in the frequency conversion cabinet also controls the air source fan 2. Since cooling and circulating air are only required when the frequency conversion cabinet is running, the fan 2 is powered by the power supply in the frequency conversion cabinet, and the fan 2 can be turned on and off synchronously with the air source fan 2 and the frequency conversion cabinet. The inherent power supply in the existing frequency conversion cabinet is 380VAC, 50HZ, and 220VAC, 50HZ AC power can be collected at the incoming line to power the fan 2.

[0039] In some embodiments, the frequency conversion cabinet has at least two air outlets 101, for example, three air outlets 101 are provided. One air outlet 101 is provided at the top of the frequency conversion cabinet 1, and the other two air outlets 101 are provided on two different sides, which is conducive to discharging the hot air inside the frequency conversion cabinet 1 nearby and achieving uniform heat dissipation. At the same time, since the hot air is located at the top, one of the openings is provided at the top of the frequency conversion cabinet 1, and the hot air flow is discharged more smoothly. Preferably, the air outlet 101 provided on the side of the frequency conversion cabinet 1 is located in the upper half of the side of the frequency conversion cabinet 1, which is conducive to the smooth and sufficient dissipation of the hot air flow.

[0040] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited to the above embodiments. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of protection claimed by the utility model. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. An active circulating air cooling and filtering device, comprising a frequency conversion cabinet (1), wherein the frequency conversion cabinet (1) is provided with an air inlet (100) and an air outlet (101), characterized in that: Also includes: A fan (2) for inputting air into the frequency conversion cabinet (1), wherein an air outlet (101) of the fan (2) is connected to an air inlet (102) of the frequency conversion cabinet (1); An electrostatic filter (3) and a coarse filter (4) are fixedly connected to the fan (2) and cover the air inlet (2) of the fan (2), wherein the electrostatic filter (3) is insulated from the fan (2) and the coarse filter (4), and the coarse filter (4) is located outside the electrostatic filter (3). The static electricity generating element comprises a static electricity head (7) and a static electricity generating power source, wherein the static electricity generating power source is electrically connected to the static electricity head (7), and the static electricity head (7) is electrically connected to the static electricity filter (3).

2. The active circulating air cooling and filtering device according to claim 1, characterized in that: The electrostatic filter (3) is an electrostatic electret polyacrylic acid filter.

3. The active circulating air cooling and filtering device according to claim 1, characterized in that: The coarse filter screen (4) is filter paper.

4. The active circulating air cooling and filtering device according to claim 3, characterized in that: The filter paper is folded into a wave shape and covers the air inlet ( ) of the fan ( 2 ).

5. The active circulating air cooling and filtering device according to claim 1, characterized in that: The fan (2) is fixedly connected to the frequency conversion cabinet (1), the fan (2) covers the air inlet (101) of the frequency conversion cabinet (1), and the air outlet (101) of the fan (2) is located inside the frequency conversion cabinet (1).

6. The active circulating air cooling and filtering device according to claim 1, characterized in that: The panel (201) of the fan (2) is provided with a mounting groove (202) surrounding the air inlet (), the electrostatic filter (3), the coarse filter (4) and the grille (5) are sequentially mounted in the mounting groove (202) from the inside to the outside, and the grille (5) is fixedly connected to the panel (201) of the fan (2) and presses the electrostatic filter (3) and the coarse filter (4).

7. The active circulating air cooling and filtering device according to claim 1, characterized in that: The fan (2) is powered by a frequency conversion cabinet power supply.

8. The active circulating air cooling and filtering device according to claim 1, characterized in that: The frequency conversion cabinet has at least two air outlets (101), which are respectively opened on the top and the side of the frequency conversion cabinet body (1).

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