Drawer-type filter device for air conditioner of electrical control cabinet

Abstract

The utility model belongs to the technical field of fluid machinery, concretely relates to a drawer type filter device of electrical control cabinet air conditioner, is installed on electrical control cabinet air conditioner, is used for filtering the air intake of electrical control cabinet air conditioner, including air intake cover and filter screen frame, the electrical control cabinet air conditioner is provided with the installation port, the bottom both sides of installation port are rotatoryly installed in the bottom of air intake cover, the top wall of air intake cover is arc, and is pasted with the top of installation port, one side of air intake cover is provided with air intake, the other side is provided with air outlet, air intake is located in the side of air intake cover away from electrical control cabinet air conditioner, the bottom of installation port is provided with drawer port, filter screen frame is inserted in air intake cover through drawer port, and is clamped in the air intake side of air intake cover, in this application, filter screen frame is drawer type installation, can be conveniently disassembled, so as to clean filter screen fast, conveniently, save time and effort, and the practicality is high.

Description

Technical Field

[0001] This utility model belongs to the field of fluid machinery technology, specifically relating to a drawer-type filter device for an air conditioner in an electrical control cabinet. Background Technology

[0002] Cigarette factories employ a large number of modern production equipment in processes such as feeding, curing, tobacco processing, cigarette making, and packaging. This equipment includes, but is not limited to, tobacco processing equipment (vacuum rehumidifiers, drum dryers), tobacco leaf processing equipment (leaf threshing machines, shredders), cigarette making equipment (cigarette making machines, filter tip attaching machines, filter rod forming machines), and packaging equipment (small package packaging machines, carton packaging machines, and case packing machines). Power workshops are also provided for these machines to supply the steam, compressed air, cooling water, and electrical control signals required for equipment operation. These power workshops contain numerous electrical control cabinets (or power control cabinets); many of these power control cabinets are equipped with air conditioning systems, and each power control cabinet is typically equipped with an air conditioning system to precisely control its internal temperature.

[0003] However, when the fresh air filter of the air conditioning system becomes dirty and clogged, it causes inaccurate temperature control inside the cabinet, increases energy consumption, and requires regular manual cleaning. Since the fresh air filter is installed inside the air conditioner casing, each cleaning requires a maintenance worker to remove the filter cover with tools, making the maintenance process troublesome and requiring a lot of effort. Utility Model Content

[0004] The purpose of this utility model is to provide a drawer-type filter device for an air conditioner in an electrical control cabinet. The filter screen is integrated on the filter frame. During installation, the filter frame is installed in the air inlet cover in a drawer-like manner to filter the airflow from the air inlet to the air outlet and then into the air conditioner in the electrical control cabinet. The drawer-like installation method allows for easy disassembly, so as to facilitate quick and convenient cleaning of the filter screen. This solves the problems mentioned in the background art.

[0005] To achieve the above-mentioned technical objectives, the technical solution adopted by this utility model is as follows:

[0006] A drawer-type filter device for an electrical control cabinet air conditioner is installed on the air conditioner and used to filter the incoming air of the air conditioner. It includes an air inlet hood and a filter holder. The air conditioner has an installation port. The bottom end of the air inlet hood is rotatably mounted on both sides of the bottom of the installation port. The top wall of the air inlet hood is arc-shaped and fits against the top of the installation port. One side of the air inlet hood has an air inlet, and the other side has an air outlet. The air inlet is located on the side of the air inlet hood furthest from the air conditioner. A drawer opening is provided at the bottom of the installation port. The filter holder is inserted into the air inlet hood through the drawer opening and is engaged with the air inlet side of the air inlet hood. A filter screen is installed on the filter holder. When the filter screen becomes clogged, causing the air pressure difference on both sides to exceed a set threshold, the air pressure causes the air inlet hood to overcome its own weight and move the air inlet closer to the side of the air conditioner.

[0007] In this application, after the air inlet hood and filter holder are installed, their centers of gravity are offset to the side furthest from the installation opening. Therefore, if the filter is not clogged, the flowing air will not push the air inlet hood to rotate. Simultaneously, the filter holder integrates the filter, allowing for integrated installation and removal. During installation, the filter holder is installed in a drawer-like manner within the air inlet hood. The filter filters the airflow from the air inlet to the air outlet and then into the air conditioning unit of the electrical control cabinet, intercepting impurities and foreign objects. This drawer-like installation method allows for easy disassembly of the filter holder and filter, facilitating quick and convenient cleaning of the filter. Cleaning can be performed without tools, saving time and effort, reducing maintenance costs, and increasing practicality.

[0008] Furthermore, it also includes a mechanical differential pressure indicator; the mechanical differential pressure indicator connects to the spaces on both sides of the filter screen via two gas conduits to indicate the air pressure difference on both sides of the filter screen. When the filter screen becomes clogged, causing the air pressure difference on both sides to exceed a set threshold, the mechanical differential pressure indicator can visually indicate this air pressure difference, triggering the cleaning of the filter screen and ensuring timely maintenance.

[0009] Furthermore, at least one side wall of the air inlet hood is provided with a dirt blockage indicator, and an indicator block is slidably installed inside the dirt blockage indicator. The inner side wall of the indicator block is connected to the mechanical differential pressure indicator. The mechanical differential pressure indicator is a purely mechanical structure with high reliability.

[0010] Furthermore, the mechanical differential pressure indicator includes an integrated housing and a diaphragm installed inside the integrated housing. The diaphragm divides the inner cavity of the integrated housing into two gas chambers, which are respectively connected to two gas conduits. The diaphragm is driven by a connecting rod, which is connected to the indicator block.

[0011] Furthermore, an adjusting rod is threadedly connected to one side of the integrated shell. The adjusting rod extends into the gas chamber and is connected to a spring. The other end of the spring abuts against the diaphragm.

[0012] Through the mechanical linkage of a flexible diaphragm, spring, and dual-color indicator block, pressure difference changes are transformed into an intuitive "clean-clogged" status indication, requiring no power supply and overcoming the reliability bottleneck of electronic sensors in harsh environments.

[0013] By introducing a spring preload adjustment function, the alarm threshold of the mechanical differential pressure indicator is dynamically set by adjusting the spring stiffness, adapting to the dirt and blockage judgment needs of air conditioning systems with different control cabinet air volume, and improving the versatility and accuracy of the device.

[0014] Furthermore, guide grooves are provided on the inner walls of both sides of the mounting port, and guide rods are installed on the outer walls of both sides of the air inlet shroud, with the guide rods slidingly engaging with the guide grooves.

[0015] The utility model employing the above technical solution has the following advantages:

[0016] In this application, the filter screen adopts a drawer-type installation method, which can be easily disassembled for quick and convenient cleaning; it enables tool-free pull-out replacement, greatly simplifies the maintenance process, and solves the problem of time-consuming and labor-intensive traditional cover disassembly.

[0017] The mechanical differential pressure indicator visually indicates the filter's clogging status, triggering filter cleaning and ensuring timely maintenance. Through the mechanical linkage of a flexible diaphragm, spring, and dual-color indicator block, pressure changes are transformed into an intuitive "clean-clogging" status indication, requiring no power supply and overcoming the reliability bottleneck of electronic sensors in harsh environments.

[0018] By introducing a spring preload adjustment function, the alarm threshold of the mechanical differential pressure indicator is dynamically set by adjusting the spring stiffness, adapting to the dirt and blockage judgment needs of air conditioning systems with different control cabinet air volume, and improving the versatility and accuracy of the device. Attached Figure Description

[0019] This utility model can be further illustrated by the non-limiting embodiments given in the accompanying drawings;

[0020] Figure 1 This is one of the structural schematic diagrams of an embodiment of a drawer-type filter device for an air conditioner in an electrical control cabinet according to the present invention;

[0021] Figure 2 This is a second structural schematic diagram of an embodiment of a drawer-type filter device for an air conditioner in an electrical control cabinet according to this utility model.

[0022] Figure 3 This is the third structural schematic diagram of an embodiment of a drawer-type filter device for an air conditioner in an electrical control cabinet according to this utility model.

[0023] Figure 4 for Figure 3 Enlarged structural diagram at point A;

[0024] Figure 5 This is a schematic diagram of the mechanical differential pressure indicator in an embodiment of the present invention;

[0025] Figure 6 This is a cross-sectional structural diagram of the mechanical differential pressure indicator in an embodiment of this utility model;

[0026] The symbols for the main components are explained below:

[0027] 100. Electrical control cabinet air conditioner; 101. Mounting port; 102. Mounting hole; 103. Guide groove; 200. Air inlet cover; 201. Air inlet; 202. Dirt / clogging indicator port; 203. Indicator block; 204. Drawer opening; 205. Locking strip; 206. Fan-shaped side plate; 207. Guide strip; 208. Rotating shaft; 209. Connecting hole; 210. Protrusion; 211. Connecting rod; 300. Filter frame; 301. Filter screen; 302. Lifting handle; 400. Mechanical differential pressure indicator; 401. Integrated housing; 402. Adjusting rod; 403. Guide groove; 404. First gas conduit; 405. Second gas conduit; 406. Cover plate; 407. Slider; 408. Diaphragm; 409. Spring. Detailed Implementation

[0028] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that similar or identical parts are referred to by the same reference numerals in the drawings or description. Implementations not shown or described in the drawings are forms known to those skilled in the art. Furthermore, directional terms mentioned in the embodiments, such as "up," "down," "top," "bottom," "left," "right," "front," and "back," are only for reference to the directions in the drawings and are not intended to limit the scope of protection of the present invention.

[0029] like Figures 1 to 6As shown, in one embodiment, a drawer-type filter device for an electrical control cabinet air conditioner is installed on the electrical control cabinet air conditioner 100 (hereinafter referred to as the air conditioner) to filter the incoming air of the electrical control cabinet air conditioner 100. The housing of the electrical control cabinet air conditioner 100 is provided with mounting holes 102 on the top and bottom, and can be installed on the side wall of the electrical control cabinet through the mounting holes 102. The electrical control cabinet air conditioner 100 cools the operation of the electrical control cabinet, so that the electrical control cabinet operates stably at a suitable temperature, such as controlling the internal temperature of the cabinet within the allowable operating range of the equipment, usually 20-35℃, to prevent problems such as decreased insulation performance, contact oxidation, and failure of electronic components caused by high temperature. This device includes an air inlet hood 200 and a filter frame 300. The air conditioner 100 in the electrical control cabinet is provided with an installation port 101. The bottom end of the air inlet hood 200 is rotatably installed on both sides of the bottom of the installation port 101. The top wall of the air inlet hood 200 is arc-shaped and fits against the top of the installation port 101. In order to guide the rotation of the air inlet hood 200, guide grooves 103 are provided in the housing on both sides of the installation port 101. Correspondingly, guide rods are installed on the outer walls on both sides of the air inlet hood 200, and the guide rods slide in cooperation with the guide grooves 103. An air inlet 201 is provided on one side of the air inlet hood 200 and an air outlet is provided on the other side. The air inlet 201 is located on the side of the air inlet hood 200 away from the air conditioner 100 in the electrical control cabinet. A drawer opening 204 is provided at the bottom of the mounting opening 101. The filter frame 300 is inserted into the air inlet hood 200 through the drawer opening 204 and is snapped onto the side of the air inlet 201 of the air inlet hood 200. A filter 301 is installed on the filter frame 300. When the filter 301 is blocked, the air pressure difference on both sides exceeds a set threshold. The wind pressure causes the air inlet hood 200 to overcome its own weight and move the air inlet 201 closer to the side of the air conditioner 100 in the electrical control cabinet.

[0030] In fact, a guide strip 207 is installed on the side of the air inlet hood 200 near the air inlet 201, and the air inlet 201 is configured as a panel with a mesh opening; the guide strip 207 and the panel can limit the filter frame 300. A locking strip 205 is provided at the top of the air inlet hood 200, and the locking strip 205 abuts against the L-shaped step at the top of the filter frame 300.

[0031] In fact, the air inlet cover 200 can be integrally machined or spliced ​​with two fan-shaped side plates 206 and a panel. Rotation holes are machined at the bottom ends of the two fan-shaped side plates 206; a rotating shaft 208 is installed on the inner wall of the air conditioner housing, and the air inlet cover 200 is installed through the rotational connection between the rotating holes and the rotating shaft 208.

[0032] In fact, silicone sealing strips are installed on the drawer opening 204, the bottom wall of the filter holder 300, or both; locking clips are provided on the top inner wall of the air inlet cover 200 and the top wall of the filter holder 300. A pull handle 302 is integrally provided at the bottom of the filter holder 300; the filter holder 300 can be pulled out more easily by pulling the handle 302. In this way, tool-free pull-out replacement of the filter is achieved, greatly simplifying the cleaning and maintenance process and solving the problem of time-consuming and labor-intensive cleaning of the filter by disassembling the cover of the traditional air conditioner.

[0033] In fact, the end of the guide groove 103 near the air inlet 201 is not completely through; therefore, the guide groove 103 has a stroke limit on the guide of the air inlet cover 200, so that the rotation of the air inlet cover 200 cannot be dislodged, making it more stable and reliable.

[0034] In fact, with Figure 1 For example, when the air inlet cover 200 rotates to the right side of the guide groove 103, the lifting handle 302 just abuts against the drawer opening 204, which can also assist in limiting the air inlet cover 200.

[0035] In this embodiment, a mechanical differential pressure indicator 400 is also included; the mechanical differential pressure indicator 400 is connected to the space on both sides of the filter screen 301 through two gas conduits (i.e., the first gas conduit 404 and the second gas conduit 405) to indicate the gas pressure difference on both sides of the filter screen 301.

[0036] In fact, a dirt blockage indicator 202 is provided on the right side wall of the air inlet hood 200, and an indicator block 203 is slidably installed inside the dirt blockage indicator 202. The inner side wall of the indicator block 203 is connected to the mechanical differential pressure indicator 400.

[0037] In fact, the side of the indicator block 203 exposed outside the air inlet shroud 200 is set to two colors, such as red and green; the area indicated by this side is displayed in only one color each time the indicator block 203 is slid to the left or right; for example, the green "clean" area is slid and the red "dirty" area is slid, forming a conspicuous visual warning.

[0038] In this embodiment, two mechanical differential pressure indicators 400 can also be provided as needed, with two dirt clogging indicator ports 202 and indicator blocks 203 on the left and right sides. The monitoring results of filter dirt clogging can be seen from both directions, which is convenient and accurate.

[0039] In this embodiment, the mechanical differential pressure indicator 400 includes an integrated housing 401 and a diaphragm 408 installed inside the integrated housing 401. The diaphragm 408 divides the inner cavity of the integrated housing 401 into two gas chambers, which are respectively connected to two gas conduits. The diaphragm 408 is drivenly connected to a slider 407, which is connected to a connecting rod 211. The connecting rod 211 is connected to an indicator block 203. A cover plate 406 is installed at the bottom of the integrated housing 401 to seal the inner cavity.

[0040] The two gas chambers are designated as the inner pressure chamber and the outer pressure chamber, respectively, and the two gas conduits are designated as the first gas conduit 404 and the second gas conduit 405. A connecting hole 209 is provided on the locking strip 205; there is a gap between the locking strip 205 and the panel constituting the air inlet 201, allowing the air intake of the air inlet 201 to enter the connecting hole 209; the connecting hole 209 can be directly connected to the first gas conduit 404, or it can be connected through a conduit; the first gas conduit 404 is connected to the outer pressure chamber; the second gas conduit 405 is connected to the inner pressure chamber; the pressure difference between the inner and outer sides of the filter screen 301 can affect the inner and outer pressure chambers through the first gas conduit 404 and the second gas conduit 405, thereby causing the diaphragm to undergo elastic deformation due to the pressure difference; thus pushing the slider and connecting rod to move, causing the indicator block 203 to slide.

[0041] In fact, a guide groove 403 is provided at the bottom of the integrated shell 401, and the slider 407 slides in cooperation with the guide groove 403; a stop rod is connected to the inner side of the slider 407, and the stop rod abuts against the diaphragm 408. Elastic felt is connected between the two sides of the slider 407 and the guide groove 403, which seals the guide groove 403 without affecting the sliding of the slider 407. A protrusion 210 is provided on the back side of the indicator block 203, and a groove is provided on the protrusion 210. The connecting rod 211 is inserted into the groove, and the movement of the connecting rod can drive the protrusion 210 and the indicator block 203 to slide; and during the sliding process, the dirt blockage indicator port 202 limits and guides the indicator block 203.

[0042] In fact, an adjusting rod 402 is threadedly connected to one side of the integrated housing 401. The adjusting rod 402 extends into the gas chamber and is connected to a spring 409. The other end of the spring 409 abuts against the diaphragm 408. The adjusting rod 402 can adjust the preload of the spring, thereby adjusting the initial position of the diaphragm 408.

[0043] In fact, a spring can also be installed between the inner wall of the integrated housing 401 and the diaphragm 408, and the elastic deformation of the diaphragm 408 can be controlled by two springs. In this way, a spring preload adjustment function is introduced, and the alarm threshold is dynamically set by adjusting the spring stiffness, which can adapt to the dirt and blockage judgment requirements of air conditioning systems with different control cabinet air volume, and improve the versatility and accuracy of the device.

[0044] In practice, when the air conditioner is running, external airflow passes through the filter holder 300 into the air inlet hood 200 and the electrical control cabinet. Under clean conditions, the pressure difference (ΔP) between the air ducts (or space) before and after the filter 301 remains at a low baseline (ΔP0, which can be preset). As the filter 301 gradually becomes clogged, airflow resistance increases, and the pressure difference ΔP continues to rise, causing the diaphragm 408 inside the mechanical differential pressure indicator 400 to undergo elastic deformation. The deformation of the diaphragm 408 is proportional to the pressure difference. When ΔP exceeds a preset threshold, the diaphragm 408 drives the indicator block 203 to slide from the green "clean" zone to the red "clogged" zone, creating a prominent visual alarm. Maintenance personnel can easily pull out the filter holder 300 without tools to quickly replace or clean the filter 301. This device abandons the conventional reliance on electronic components and uses a purely mechanical structure to achieve differential pressure sensing and status feedback. It also features strong anti-interference capabilities and low maintenance costs, making it particularly suitable for high humidity, dust, or explosion-proof scenarios. It reduces the traditional time-consuming disassembly and inspection process to within one minute, significantly improving the reliability and operation and maintenance efficiency of electrical control cabinets.

[0045] The above provides a detailed description of a drawer-type filter device for an air conditioner in an electrical control cabinet according to this utility model. The specific embodiments are described only to aid in understanding the method and core concept of this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A drawer-type filter device for an electrical control cabinet air conditioner, installed on the electrical control cabinet air conditioner (100), for filtering the intake air of the electrical control cabinet air conditioner (100); characterized in that, The air conditioner (100) includes an air inlet hood (200) and a filter rack (300). The air conditioner (100) in the electrical control cabinet is provided with a mounting port (101). The bottom end of the air inlet hood (200) is rotatably mounted on both sides of the bottom of the mounting port (101). The top wall of the air inlet hood (200) is arc-shaped and fits against the top of the mounting port (101). One side of the air inlet hood (200) is provided with an air inlet (201), and the other side with an air outlet. The air inlet (201) is located on the air inlet hood (200) away from the air conditioner (100). The bottom of the mounting port (101) is provided with a drawer opening (204). The filter frame (300) is inserted into the air inlet cover (200) through the drawer opening (204) and is snapped into the air inlet (201) side of the air inlet cover (200). A filter screen (301) is installed on the filter frame (300). When the filter screen (301) is blocked, the air pressure difference on both sides exceeds a set threshold. The wind pressure causes the air inlet cover (200) to overcome its own weight and drive the air inlet (201) to be close to the side of the air conditioner (100) of the electrical control cabinet.

2. The drawer-type filter device for an air conditioner in an electrical control cabinet according to claim 1, characterized in that, It also includes a mechanical differential pressure indicator (400); the mechanical differential pressure indicator (400) is connected to the space on both sides of the filter screen (301) through two gas conduits to indicate the gas pressure difference on both sides of the filter screen (301).

3. The drawer-type filter device for an air conditioner in an electrical control cabinet according to claim 2, characterized in that, At least one side wall of the air inlet hood (200) is provided with a dirt blockage indicator (202), and an indicator block (203) is slidably installed in the dirt blockage indicator (202). The inner side wall of the indicator block (203) is connected to the mechanical differential pressure indicator (400).

4. The drawer-type filter device for an air conditioner in an electrical control cabinet according to claim 3, characterized in that, The mechanical differential pressure indicator (400) includes an integrated housing (401) and a diaphragm (408) installed inside the integrated housing (401). The diaphragm (408) divides the inner cavity of the integrated housing (401) into two gas chambers, and the two gas chambers are respectively connected to two gas conduits. The diaphragm (408) is driven by a connecting rod (211), and the connecting rod (211) is connected to the indicator block (203).

5. The drawer-type filter device for an air conditioner in an electrical control cabinet according to claim 4, characterized in that, An adjusting rod (402) is threadedly connected to one side of the integrated housing (401). The adjusting rod (402) extends into the gas chamber and is connected to a spring (409). The other end of the spring (409) abuts against the diaphragm (408).

6. The drawer-type filter device for an air conditioner in an electrical control cabinet according to claim 1, characterized in that, The inner walls on both sides of the mounting port (101) are provided with guide grooves (103), and the outer walls on both sides of the air inlet cover (200) are provided with guide rods, which are slidably engaged with the guide grooves (103).

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