An improved electrostatic filter centralized control device

Abstract

This invention provides an improved electrostatic filter centralized control device, including a centralized control cabinet located outside the air conditioning unit where the electrostatic filter is installed. The cabinet includes several high-voltage power modules, several high-voltage insulated terminals, electrical control components, and a switching device. The number of high-voltage power modules equals the number of electrostatic filters installed in the air conditioning unit and they are connected one-to-one. The electrical control components include a leakage current circuit breaker, an AC contactor, an intermediate relay, a first terminal block, and a second terminal block. These components are electrically connected to the high-voltage power modules and the switching device to form a control circuit. The high-voltage insulated terminals are covered with high-voltage insulated terminal protective covers. This invention physically separates the operating equipment from the control module, enabling the electrostatic filter equipment to maintain continuous and stable operation, providing purification and sterilization, even under humid and harsh conditions.

Description

Technical Field

[0001] This utility model relates to the field of air purification, and in particular to an improved electrostatic filter control device. Background Technology

[0002] With the widespread application and promotion of electrostatic filters, the ability to operate continuously and stably throughout its entire lifespan under different working conditions is one of the important indicators for evaluating electrostatic filtration products. Currently, in practical applications, when electrostatic filters are installed very close to the fresh air inlet, during rainy weather, air with relative humidity >90% flows through the filter. The humid airflow encounters the high-voltage electrostatic field, triggering arcing in the electrostatic module. High-frequency arcing prevents the equipment from functioning properly and also affects the lifespan of the high-voltage power supply components. Furthermore, the high-voltage power supply components, critical parts of the electrical box installed in the filter frame, experience accelerated damage and failure when used in high-humidity environments. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing an improved electrostatic filter control device.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: an improved electrostatic filter centralized control device, comprising a centralized control cabinet located outside the air conditioning unit where the electrostatic filter is installed. The centralized control cabinet includes several high-voltage power modules, several high-voltage insulated terminals, electrical control components, and a switching device. The number of high-voltage power modules is equal to the number of electrostatic filters installed in the air conditioning unit and they are connected one by one. The electrical control components include a leakage circuit breaker, an AC contactor, several intermediate relays, a first terminal block, and a second terminal block. The electrical control components are electrically connected to the high-voltage power modules and the switching device to form a control circuit. The high-voltage insulated terminals are covered with high-voltage insulated terminal protective covers.

[0005] Preferably, the inner wall of the control cabinet is fixedly mounted with guide rails, and the leakage circuit breaker, AC contactor, first terminal block, intermediate relay and second terminal block are all fixed on the guide rails in sequence. Several horizontal and vertical wire grooves are fixed on the inner wall of the control cabinet.

[0006] Preferably, a control board and a wiring adapter board, the same number as the high-voltage power supply module, are provided between the high-voltage power supply module and the mounting rail, and the high-voltage insulating terminal is fixed below the high-voltage power supply module.

[0007] Preferably, the control cabinet and the cabinet door are connected by hinges, the cabinet door is provided with a viewing window, and the control cabinet is provided with a door lock on the side away from the hinge.

[0008] Preferably, the switching device includes a rocker switch and a safety interlock switch. The safety interlock switch is fixed on the side of the control cabinet away from the hinge, corresponding to the position of the cabinet door away from the hinge. The rocker switch is fixed on the outer wall of the control cabinet on the side away from the hinge.

[0009] Preferably, the control circuit includes several ceramic columns of an electrostatic filter, several circuit boards of the same number as the ceramic columns, a residual current circuit breaker (RCCB), an AC contactor, a 24V switching power supply, a first intermediate relay KA1, a second intermediate relay KA2, a wind-sensing circuit board, a field maintenance door switch, a rocker switch, and a safety interlock switch. The first pin of the RCCB is electrically connected to the live wire L0, the third pin is electrically connected to the neutral wire N0, the second pin is electrically connected to the 3 / L2 contact of the AC contactor's main contact, and the fourth pin is electrically connected to the 5 / L3 contact of the AC contactor's main contact. The line between the 3 / L2 contact of the AC contactor's main contact and the second pin of the RCCB is the first line. Line 1P-L1, the line between the 5 / L3 contact of the AC contactor main contact and the 4th pin of the residual current circuit breaker is the second line 1P-N1, the T2 / 4 contact of the AC contactor main contact is electrically connected to the third line 2P-L1, the T3 / 6 contact of the AC contactor main contact is electrically connected to the fourth line 2P-N1, the L pin of the 24V switching power supply is electrically connected to the first line 1P-L1, the N pin of the 24V switching power supply is electrically connected to the second line 1P-N1, the PE pin of the 24V switching power supply is grounded, the V+ pin of the 24V switching power supply is electrically connected to the field maintenance door switch, the field maintenance door switch is electrically connected to the first intermediate relay KA1, and the first intermediate relay KA1 is electrically connected to 2 The V- pin of the 4V switching power supply, the line between the field maintenance door switch and the V+ pin of the 24V switching power supply is the fifth line L24, the line between the first intermediate relay KA1 and the field maintenance door switch is the seventh line L24-KA1, the line between the first intermediate relay KA1 and the V- pin of the 24V switching power supply is the sixth line N24, the IN terminal DC24V+ pin of the wind sensor circuit board is electrically connected to the node of the fifth line L24, the IN terminal DC24V- pin of the wind sensor circuit board is electrically connected to the node of the sixth line N24, the OUT terminal DC24V+ pin of the wind sensor circuit board is electrically connected to the OUT terminal DC24V- pin of the wind sensor circuit board through the second intermediate relay KA2, the first intermediate... The fifth pin of the first intermediate relay KA1 is electrically connected to the node of the first line 1P-L1. The ninth pin of the first intermediate relay KA1 is electrically connected to the rocker switch. The rocker switch is electrically connected to the eighth pin of the safety interlock switch. The 12th pin of the safety interlock switch is electrically connected to the fifth pin of the second intermediate relay KA2. The ninth pin of the second intermediate relay KA2 is electrically connected to the A1 pin of the AC contactor coil. The A2 pin of the AC contactor coil is electrically connected to the node of the second line 1P-N1. The plurality of circuit boards are electrically connected to the corresponding ceramic pillars. The PE pins of the plurality of circuit boards are all electrically connected to the node of the ground wire PE. The N pins of the plurality of circuit boards are all electrically connected to the node of the fourth line 2P-N1.The L pins of the aforementioned circuit boards are all electrically connected to the nodes of the third line 2P-L1. The DClean+ pins of the aforementioned circuit boards are all electrically connected to the cleanup signal dry contact +. The DClean- pins of the aforementioned circuit boards are all electrically connected to the cleanup signal dry contact -. The DAlarm+ pins of the aforementioned circuit boards are all electrically connected to the alarm signal dry contact +. The DAlarm- pins of the aforementioned circuit boards are all electrically connected to the alarm signal dry contact -. The DRun+ pin of the first circuit board is all electrically connected to the run signal dry contact +. The DRun- pin of the last circuit board is all electrically connected to the run signal dry contact -. The DRun- pins of the intermediate circuit boards are all electrically connected to the DRun+ pin of the next circuit board.

[0010] Preferably, the live wire L0 at the front end of the first pin of the residual current circuit breaker is provided with a first terminal XT1-101; the neutral wire N0 at the front end of the third pin of the residual current circuit breaker is provided with a first terminal XT1-102; the ground wire PE is provided with a first terminal XT1-103; the eighth line 1P-L2 between the ninth pin of the first intermediate relay KA1 and the rocker switch is provided with a first terminal XT1-104; the ninth line 1P-L3 between the eighth pin of the safety interlock switch and the rocker switch is provided with a first terminal XT1-105; the tenth line 1P-L4 between the 12th pin of the safety interlock switch and the A1 pin of the AC contactor coil is provided with a first terminal XT1-106; and the cleanup signal dry contact + The following terminals are provided: XT1-107 (with a first terminal block), XT1-108 (with a first terminal block), XT1-109 (with a first terminal block), XT1-110 (with a first terminal block), XT1-111 (with a first terminal block), XT1-112 (with a first terminal block), XT1-113 (with a first terminal block) on the fifth line L24 between the field maintenance door switch and the V+ pin of the 24V switching power supply), and XT1-114 (with a first terminal block) on the seventh line L24-KA1 between the field maintenance door switch and the first intermediate relay KA1.

[0011] Preferably, the L pins of the circuit board are connected in pairs to the live wire L0, and a second terminal block, which is half the number of circuit boards, is provided between the L pins of the circuit board and the live wire L0. The N pins of the circuit board are connected in pairs to the neutral wire N0, and a second terminal block, which is half the number of circuit boards, is provided between the N pins of the circuit board and the neutral wire N0.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model physically separates the operating equipment from the control module, avoiding the occurrence of arcing in the electrostatic module when humid airflow encounters a high-voltage electrostatic field. High-frequency arcing would prevent the equipment from working properly, thus maximizing the purification and sterilization functions of the electrostatic filter even under complex working conditions. Physically separating the operating equipment from the control module also extends the lifespan of the high-voltage power supply components, reducing the equipment failure rate and slowing down the damage and failure of electrical components. This simplifies the electrical control design of the electrostatic filter, improves production efficiency, and facilitates on-site after-sales maintenance. The one-to-one control between the high-voltage power supply and the high-voltage electrostatic filter module increases the advantage of non-interference between the high-voltage electrostatic filter modules. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of Embodiment 1.

[0014] Figure 2 This is the front view of Embodiment 1.

[0015] Figure 3 This is a side view of Embodiment 1.

[0016] Figure 4 This is the circuit diagram for Example 1.

[0017] Figure 5 This is a schematic diagram of the structure of Example 2.

[0018] Figure 6 This is the front view of Embodiment 2.

[0019] Figure 7 This is a side view of Example 2.

[0020] Figure 8 This is the circuit diagram for Example 2.

[0021] Figure descriptions: 1. Central control cabinet; 11. Cable tray; 12. Mounting rail; 13. Hinge; 14. Cabinet door; 15. Viewing window; 16. Central control cabinet door lock; 2. High-voltage power supply module; 21. Control board; 22. Wiring adapter board; 3. High-voltage insulated terminal; 31. High-voltage insulated terminal protective cover; 4. Residual current circuit breaker; 5. AC contactor; 6. Intermediate relay; 7. First terminal; 71. Second terminal; 8. Electrical control components; 9. Switching device; 91. Rocker switch; 92. Safety interlock switch; 93. Operating status indicator light. Detailed Implementation

[0022] To provide a better understanding of the purpose, structure, features, and functions of this utility model, detailed descriptions are provided below with reference to specific embodiments. Example 1

[0023] Please refer to the reference. Figure 1 , Figure 2 and Figure 3 This utility model provides an improved electrostatic filter centralized control device, including a centralized control cabinet 1. The centralized control cabinet 1 is located outside the air conditioning unit where the electrostatic filter is installed. The centralized control cabinet 1 includes several high-voltage power modules 2, several high-voltage insulated terminals 3, electrical control components 8, and a switching device 9. The number of high-voltage power modules 2 is equal to the number of electrostatic filters installed in the air conditioning unit and they are connected one by one. The electrical control components 8 include a leakage circuit breaker 4, an AC contactor 5, several intermediate relays 6, a first terminal 7, and a second terminal 71. The electrical control components 8 are electrically connected to the high-voltage power modules 2 and the switching device 9 to form a control circuit. The high-voltage insulated terminals 3 are covered with high-voltage insulated terminal protective covers 31.

[0024] The operating equipment and control module are physically separated to prevent humid airflow from encountering a high-voltage electrostatic field and triggering arcing in the electrostatic module. High-frequency arcing would prevent the equipment from working properly, thus maximizing the purification and sterilization functions of the electrostatic filter even under complex operating conditions. The high-voltage power supply module 2 is used to supply power to the high-voltage electrostatic filter module one-to-one. The high-voltage insulating terminal protective cover 31 is used to prevent electric shock, avoid short circuits, and block dust, moisture, and other contaminants from entering the terminal, keeping the electrical connection clean and dry and extending its service life. The one-to-one control between the high-voltage power supply and the high-voltage electrostatic filter module increases the advantage of no interference between the high-voltage electrostatic filter modules.

[0025] In one embodiment, such as Figure 1 and Figure 2 As shown, the inner wall of the central control cabinet 1 is fixedly mounted with guide rails 12. The residual current circuit breaker 4, AC contactor 5, first terminal block 7, intermediate relay 6, and second terminal block 71 are all sequentially fixed on the guide rails 12. Several horizontally and vertically arranged wire troughs 11 are fixed on the inner wall of the central control cabinet 1. The guide rails 12 are used to fix the electrical control components 8, and the wire troughs 11 are used to fix the wires inside the central control cabinet 1, avoiding messy internal wires and preventing accidental contact between different lines, thereby reducing the risk of short circuits. The residual current circuit breaker 4 adopts the ABB F200 series for the protection of the main power supply incoming line. The AC contactor 5 adopts the Siemens 3RT series for the control of the high-voltage power supply main circuit. The intermediate relay 6 adopts the Schneider RXM series for protecting the low-voltage control circuit from high-voltage interference and isolating the PLC from the high-voltage circuit to prevent high-voltage intrusion. The first terminal block 7 adopts the WAGO 2002 series for internal component wiring. The second terminal block 71 adopts the Phoenix Contact PT series for the input and output of the electrical control cabinet.

[0026] In one embodiment, such as Figure 2 and Figure 3 As shown, the high-voltage power supply module 2 is provided with a control board 21 and a wiring adapter board 22 in the same number as the high-voltage power supply module 2 between the high-voltage power supply module 2 and the mounting rail 12. The high-voltage insulation terminal 3 is fixed below the high-voltage power supply module 2, separating the high-voltage interface from the low-voltage control circuit to avoid accidental contact or arc discharge risk. There is sufficient insulation distance to prevent high-voltage breakdown. The control board 21 is driven by STM32+IR2110, and the wiring adapter board 22 is from the TEConnectivity AMP series.

[0027] In one embodiment, such as Figure 1 and Figure 2 As shown, the central control cabinet 1 and the cabinet door 14 are connected by a hinge 13. The cabinet door 14 is provided with a viewing window 15. The central control cabinet 1 is provided with a central control cabinet door lock 16 on the side away from the hinge 13. The viewing window 15 facilitates observation of the operation inside the central control cabinet 1. The viewing window 15 is made of transparent acrylic sheet.

[0028] In one embodiment, such as Figure 1 and Figure 2 As shown, the switching device 9 includes a rocker switch 91 and a safety interlock switch 92. The safety interlock switch 92 is fixed on the side of the control cabinet 1 away from the hinge 13, corresponding to the side of the cabinet door 14 away from the hinge 13. The rocker switch 91 is fixed on the outer wall of the control cabinet 1 on the side away from the hinge 13. When the cabinet door is opened, the safety interlock switch 92 is disconnected, thereby disconnecting the internal power supply and playing a safety protection role.

[0029] In one embodiment, such as Figure 4As shown, the control circuit includes several ceramic columns of an electrostatic filter, several circuit boards of the same number as the ceramic columns, a residual current circuit breaker 4, an AC contactor 5, a 24V switching power supply, a first intermediate relay KA1, a second intermediate relay KA2, a wind-sensing circuit board, a field maintenance door switch, a rocker switch 91, and a safety interlock switch 92. The first pin of the residual current circuit breaker 4 is electrically connected to the live wire L0, the third pin of the residual current circuit breaker 4 is electrically connected to the neutral wire N0, the second pin of the residual current circuit breaker 4 is electrically connected to the 3 / L2 contact of the main contactor of the AC contactor 5, and the fourth pin of the residual current circuit breaker 4 is electrically connected to the 5 / L3 contact of the main contactor of the AC contactor 5. The 3 / L2 contact of the main contactor of the AC contactor 5 is connected to the residual current circuit breaker 4. The circuit between pins 2 and 3 is the first circuit 1P-L1. The circuit between the 5 / L3 contact of the main contactor 5 and pin 4 of the residual current circuit breaker 4 is the second circuit 1P-N1. The T2 / 4 contact of the main contactor 5 is electrically connected to the third circuit 2P-L1. The T3 / 6 contact of the main contactor 5 is electrically connected to the fourth circuit 2P-N1. The L pin of the 24V switching power supply is electrically connected to the first circuit 1P-L1. The N pin of the 24V switching power supply is electrically connected to the second circuit 1P-N1. The PE pin of the 24V switching power supply is grounded. The V+ pin of the 24V switching power supply is electrically connected to the field maintenance door switch. The field maintenance door switch is electrically connected to the first intermediate relay KA1. The first intermediate relay KA1 is electrically connected to the V- pin of the 24V switching power supply. The line between the field maintenance door switch and the V+ pin of the 24V switching power supply is the fifth line L24. The line between the first intermediate relay KA1 and the field maintenance door switch is the seventh line L24-KA1. The line between the first intermediate relay KA1 and the V- pin of the 24V switching power supply is the sixth line N24. The IN terminal DC24V+ pin of the wind sensor circuit board is electrically connected to the node of the fifth line L24. The IN terminal DC24V- pin of the wind sensor circuit board is electrically connected to the node of the sixth line N24. The OUT terminal DC24V+ pin of the wind sensor circuit board is electrically connected to the wind sensor circuit board through the second intermediate relay KA2. The OUT terminal is a DC24V pin. The 5th pin of the first intermediate relay KA1 is electrically connected to the node of the first line 1P-L1. The 9th pin of the first intermediate relay KA1 is electrically connected to the rocker switch 91. The rocker switch 91 is electrically connected to the 8th pin of the safety interlock switch 92. The 12th pin of the safety interlock switch 92 is electrically connected to the 5th pin of the second intermediate relay KA2. The 9th pin of the second intermediate relay KA2 is electrically connected to the A1 pin of the AC contactor 5 coil. The A2 pin of the AC contactor 5 coil is electrically connected to the node of the second line 1P-N1. The plurality of circuit boards are electrically connected to their corresponding ceramic pillars. The PE pins of the plurality of circuit boards are all electrically connected to the node of the ground wire PE.The N pins of the aforementioned circuit boards are all electrically connected to the node of the fourth line 2P-N1; the L pins of the aforementioned circuit boards are all electrically connected to the node of the third line 2P-L1; the DClean+ pins of the aforementioned circuit boards are all electrically connected to the cleanup signal dry contact +; the DClean- pins of the aforementioned circuit boards are all electrically connected to the cleanup signal dry contact -; the DAlarm+ pins of the aforementioned circuit boards are all electrically connected to the alarm signal dry contact +; the DAlarm- pins of the aforementioned circuit boards are all electrically connected to the alarm signal dry contact -; the DRun+ pin of the first circuit board is all electrically connected to the run signal dry contact +; the DRun- pin of the last circuit board is all electrically connected to the run signal dry contact -; and the DRun- pins of the intermediate circuit boards are all electrically connected to the DRun+ pin of the next circuit board. The wind sensor circuit board uses the Honeywell Zephyr HAF series for real-time monitoring of airflow status.

[0030] In one embodiment, such as Figure 4 As shown, the live wire L0 at the front end of the first pin of the residual current circuit breaker 4 is provided with the XT1-101 terminal of the first terminal 7; the neutral wire N0 at the front end of the third pin of the residual current circuit breaker 4 is provided with the XT1-102 terminal of the first terminal 7; the ground wire PE is provided with the XT1-103 terminal of the first terminal 7; the eighth line 1P-L2 between the ninth pin of the first intermediate relay KA1 and the rocker switch 91 is provided with the XT1-104 terminal of the first terminal 7; the ninth line 1P-L3 between the eighth pin of the safety interlock switch 92 and the rocker switch 91 is provided with the XT1-105 terminal of the first terminal 7; the tenth line 1P-L4 between the 12th pin of the safety interlock switch 92 and the A1 pin of the AC contactor 5 coil is provided with the XT1-106 terminal of the first terminal 7; the clearing signal... The dry contact + is equipped with a first terminal XT1-107 of the first terminal 7, the cleaning signal dry contact - is equipped with a first terminal XT1-108 of the first terminal 7, the alarm signal dry contact + is equipped with a first terminal XT1-109 of the first terminal 7, the alarm signal dry contact - is equipped with a first terminal XT1-110 of the first terminal 7, the running signal dry contact + is equipped with a first terminal XT1-111 of the first terminal 7, the running signal dry contact - is equipped with a first terminal XT1-112 of the first terminal 7, the fifth line L24 between the field maintenance door switch and the V+ pin of the 24V switching power supply is equipped with a first terminal XT1-113 of the first terminal 7, and the seventh line L24-KA1 between the field maintenance door switch and the first intermediate relay KA1 is equipped with a first terminal XT1-114 of the first terminal 7.

[0031] In one embodiment, such as Figure 4As shown, the L pins of the circuit board are connected in pairs to the live wire L0. A second terminal 71, which is half the number of circuit boards, is provided between the L pins of the circuit board and the live wire L0. The N pins of the circuit board are connected in pairs to the neutral wire N0. A second terminal 71, which is half the number of circuit boards, is provided between the N pins of the circuit board and the neutral wire N0.

[0032] Usage: Combine Figures 1-4 As shown, the high-voltage power supply and the high-voltage electrostatic filter module are set up separately, and the circuit board is connected to the ceramic column of the electrostatic filter one by one. Physical isolation minimizes the risk of failure caused by direct contact between the electrical components of the high-voltage power supply and the harsh working conditions. Example 2

[0033] Please refer to the reference. Figure 5 , Figure 6 and Figure 7 This utility model provides an improved electrostatic filter centralized control device, including a centralized control cabinet 1. The centralized control cabinet 1 is located outside the air conditioning unit where the electrostatic filter is installed. The centralized control cabinet 1 includes several high-voltage power modules 2, several high-voltage insulated terminals 3, electrical control components 8, and a switching device 9. The high-voltage power modules 2 are electrically connected to several electrostatic filters. The electrical control components 8 include a leakage circuit breaker 4, an AC contactor 5, several intermediate relays 6, and a first terminal 7. The electrical control components 8 are electrically connected to the high-voltage power modules 2 and the switching device 9 to form a control circuit. The high-voltage insulated terminals 3 are covered with high-voltage insulated terminal protective covers 31.

[0034] The operating equipment and control module are physically separated to prevent humid airflow from encountering a high-voltage electrostatic field and triggering arcing in the electrostatic module. High-frequency arcing would prevent the equipment from working properly, thus maximizing the purification and sterilization functions of the electrostatic filter even under complex operating conditions. The high-voltage power supply module 2 is used to supply power to the high-voltage electrostatic filter module one-to-one. The high-voltage insulating terminal protective cover 31 is used to prevent electric shock, avoid short circuits, and block dust, moisture and other contaminants from entering the terminal, keeping the electrical connection clean and dry and extending its service life. The high-voltage power supply can simultaneously carry multiple electrostatic module loads, making the electrical control layout and after-sales maintenance of the electrical control system simpler.

[0035] In one embodiment, such as Figure 5 and Figure 6As shown, the inner wall of the central control cabinet 1 is fixedly mounted with guide rails 12. The residual current circuit breaker 4, AC contactor 5, first terminal block 7, and intermediate relay 6 are all sequentially fixed on the guide rails 12. Several horizontally and vertically arranged wire troughs 11 are fixed on the inner wall of the central control cabinet 1. The guide rails 12 are used to fix the electrical control components 8, and the wire troughs 11 are used to fix the wires inside the central control cabinet 1, avoiding messy internal wires and preventing accidental contact between different lines, thereby reducing the risk of short circuits. The residual current circuit breaker 4 adopts the ABB F200 series and is used for the protection of the main power supply incoming line. The AC contactor 5 adopts the Siemens 3RT series and is used for the control of the high-voltage power supply main circuit. The intermediate relay 6 adopts the Schneider RXM series and is used to protect the low-voltage control circuit from high-voltage interference and isolate the PLC from the high-voltage circuit to prevent high voltage intrusion. The first terminal block 7 adopts the WAGO2002 series and is used for wiring internal components.

[0036] In one embodiment, such as Figure 6 and Figure 7 As shown, the high-voltage insulating terminal 3 is fixed below the high-voltage power supply module 2, separating the high-voltage interface from the low-voltage control circuit to avoid the risk of accidental contact or arc discharge, and has sufficient insulation distance to prevent high-voltage breakdown.

[0037] In one embodiment, such as Figure 5 and Figure 6 As shown, the central control cabinet 1 and the cabinet door 14 are connected by a hinge 13. The cabinet door 14 is provided with a viewing window 15. The central control cabinet 1 is provided with a central control cabinet door lock 16 on the side away from the hinge 13. The viewing window 15 facilitates observation of the operation inside the central control cabinet 1. The viewing window 15 is made of transparent acrylic sheet.

[0038] In one embodiment, such as Figure 5 and Figure 6 As shown, the switching device 9 includes a rocker switch 91, a safety interlock switch 92, and a working status indicator light 93. The safety interlock switch 92 is fixed on the side of the control cabinet 1 away from the hinge 13, corresponding to the position of the cabinet door 14 away from the hinge 13. The rocker switch 91 is fixed on the outer wall of the control cabinet 1 on the side away from the hinge 13. The working status indicator light 93 is fixed above the rocker switch 91. The working status indicator light 93 is used to indicate the operating status of the equipment. When the cabinet door is opened, the safety interlock switch 92 is disconnected, thereby disconnecting the internal power supply and playing a safety protection role.

[0039] In one embodiment, such as Figure 8As shown, the control circuit includes a ceramic column of an electrostatic filter, a circuit board, a residual current circuit breaker 4, an AC contactor 5, a 24V switching power supply, a 12V switching power supply, a first intermediate relay KA1, a second intermediate relay KA2, a third intermediate relay KA3, a fourth intermediate relay KA4, a fifth intermediate relay KA5, a wind-sensing circuit board, a rocker switch 91, and a safety interlock switch 92. The first pin of the residual current circuit breaker 4 is electrically connected to the live wire L0, the third pin of the residual current circuit breaker 4 is electrically connected to the neutral wire N0, the second pin of the residual current circuit breaker 4 is electrically connected to the 3 / L2 contact of the main contactor of the AC contactor 5, and the fourth pin of the residual current circuit breaker 4 is electrically connected to the 5 / L3 contact of the main contactor of the AC contactor 5. The circuit between the 3 / L2 contact of the main contactor 5 and the second pin of the residual current circuit breaker 4 is the first circuit 1P-L1. The circuit between the 5 / L3 contact of the main contactor 5 and the fourth pin of the residual current circuit breaker 4 is the second circuit 1P-N1. The T2 / 4 contact of the main contactor 5 is electrically connected to the third circuit L-QF1. The T3 / 6 contact of the main contactor 5 is electrically connected to the fourth circuit N-QF1. The L pin of the 24V switching power supply is electrically connected to the first circuit 1P-L1. The N pin of the 24V switching power supply is electrically connected to the second circuit 1P-N1. The PE pin of the 24V switching power supply is grounded. The V+ pin of the 24V switching power supply is electrically connected to the first intermediate relay K. A1, the first intermediate relay KA1 is electrically connected to the V- pin of the 24V switching power supply. The line between the first intermediate relay KA1 and the V+ pin of the 24V switching power supply is the fifth line L24. The line between the first intermediate relay KA1 and the V- pin of the 24V switching power supply is the sixth line N24. The IN terminal DC24V+ pin of the wind sensor circuit board is electrically connected to the node of the fifth line L24. The IN terminal DC24V- pin of the wind sensor circuit board is electrically connected to the node of the sixth line N24. The OUT terminal DC24V+ pin of the wind sensor circuit board is electrically connected to the OUT terminal DC24V- pin of the wind sensor circuit board through the second intermediate relay KA2. The fifth pin of the first intermediate relay KA1... The circuit board is electrically connected to the node of the first line 1P-L1. The 9th pin of the first intermediate relay KA1 is electrically connected to the rocker switch 91. The rocker switch 91 is electrically connected to the 8th pin of the safety interlock switch 92. The 12th pin of the safety interlock switch 92 is electrically connected to the 5th pin of the second intermediate relay KA2. The 9th pin of the second intermediate relay KA2 is electrically connected to the A1 pin of the AC contactor 5 coil. The A2 pin of the AC contactor 5 coil is electrically connected to the node of the second line 1P-N1. The circuit board is electrically connected to the ceramic pillar. The L pin of the 12V switching power supply is electrically connected to the node of the third line L-QF1. The N pin of the 12V switching power supply is electrically connected to the node of the fourth line N-QF1.The PE pin of the 12V switching power supply is electrically connected to the node of the ground PE line. The line between the PE pin of the 12V switching power supply and the node of the ground PE line is the seventh line 2P-PE. The line between the N pin of the 12V switching power supply and the node of the fourth line N-QF1 is the ninth line 2P-N1. The line between the L pin of the 12V switching power supply and the node of the third line L-QF1 is the eighth line 2P-L1. The PE pin of the circuit board is electrically connected to the node of the seventh line 2P-PE. The N pin of the circuit board is electrically connected to the node of the ninth line 2P-N1. The L pin of the circuit board is electrically connected to the node of the eighth line 2P-L1. The RUN1, ERR1, and ALR1 pins of the circuit board are all electrically connected to the node of the eighth line 2P-L1. The RUN2 pin of the circuit board is electrically connected to the third intermediate relay KA3. The ERR1 pin of the circuit board is electrically connected to the node of the third intermediate relay KA3. Pin 2 is electrically connected to the fourth intermediate relay KA4. Pin ALR2 of the circuit board is electrically connected to the fifth intermediate relay KA5. Pins RUN2, ERR2, and ALR2 of the circuit board are all electrically connected to the node of the ninth line 2P-N1. The V+ pin of the 12V switching power supply is electrically connected to the fourth intermediate relay KA4. The fourth intermediate relay KA4 is electrically connected to the red LED1. The red LED1 is electrically connected to the V- pin of the 12V switching power supply. The third intermediate relay KA3 is electrically connected to the yellow LED2. The fifth intermediate relay KA5 is electrically connected to the green LED3. The third intermediate relay KA3 and the yellow LED2, and the fourth intermediate relay KA4 and the red LED1 are connected in parallel. The fifth intermediate relay KA5 and the green LED3, and the fourth intermediate relay KA4 and the red LED1 are connected in parallel. The wind sensor circuit board uses the Honeywell Zephyr HAF series for real-time monitoring of airflow status.

[0040] In one embodiment, such as Figure 8As shown, the live wire L0 at the front end of the first pin of the residual current circuit breaker 4 is provided with the XT1-101 terminal of the first terminal 7; the neutral wire N0 at the front end of the third pin of the residual current circuit breaker 4 is provided with the XT1-102 terminal of the first terminal 7; the ground wire PE is provided with the XT1-103 terminal of the first terminal 7; the red LED1 is provided with the XT1-104 terminal of the first terminal 7 between it and the V-pin of the 12V switching power supply; the red LED1 is provided with the XT1-105 terminal of the first terminal 7 between it and the fourth intermediate relay KA4; the yellow LED2 is provided with the XT1-106 terminal of the first terminal 7 between it and the third intermediate relay KA3; the green LED3 is provided with the XT1-107 terminal of the first terminal 7 between it and the fifth intermediate relay KA5; and the eighth line 1 between the ninth pin of the first intermediate relay KA1 and the rocker switch 91... The P-L2 is provided with the XT1-110 terminal of the first terminal 7. The ninth line 1P-L3 between the 8th pin of the safety interlock switch 92 and the rocker switch 91 is provided with the XT1-111 terminal of the first terminal 7. The tenth line 1P-L4 between the 12th pin of the safety interlock switch 92 and the A1 pin of the AC contactor 5 coil is provided with the XT1-112 terminal of the first terminal 7. The two ends of the fourth intermediate relay KA4 are respectively provided with the XT1-113 terminal and the XT1-114 terminal of the first terminal 7. The two ends of the third intermediate relay KA3 are respectively provided with the XT1-115 terminal and the XT1-116 terminal of the first terminal 7. The two ends of the fifth intermediate relay KA5 are respectively provided with the XT1-117 terminal and the XT1-118 terminal of the first terminal 7.

[0041] In one embodiment, such as Figure 8 As shown, the fourth intermediate relay KA4 receives signals DAlarm+ and DAlarm- at its two ends, the third intermediate relay KA3 receives signals DClean+ and DClean- at its two ends, and the fifth intermediate relay KA5 receives signals DRun+ and DRun- at its two ends.

[0042] This utility model has been described by the above-described embodiments; however, these embodiments are merely examples for implementing this utility model. It must be noted that the disclosed embodiments do not limit the scope of this utility model. Conversely, any modifications and refinements made without departing from the spirit and scope of this utility model are within the scope of patent protection of this utility model.

Claims

1. An improved electrostatic filter centralized control device, characterized in that: The system includes a central control cabinet (1), which is located outside the air conditioning unit where an electrostatic filter is installed. The central control cabinet (1) includes several high-voltage power modules (2), several high-voltage insulated terminals (3), electrical control components (8), and a switch (9). The number of high-voltage power modules (2) is equal to the number of electrostatic filters installed in the air conditioning unit and they are connected one by one. The electrical control components (8) include a leakage circuit breaker (4), an AC contactor (5), several intermediate relays (6), a first terminal (7), and a second terminal (71). The electrical control components (8) are electrically connected to the high-voltage power modules (2) and the switch (9) to form a control circuit. The high-voltage insulated terminals (3) are covered with a high-voltage insulated terminal protective cover (31).

2. The improved electrostatic filter centralized control device as described in claim 1, characterized in that: The inner wall of the central control cabinet (1) is fixedly mounted with a guide rail (12). The leakage circuit breaker (4), AC contactor (5), first terminal (7), intermediate relay (6) and second terminal (71) are all fixed on the guide rail (12) in sequence. Several horizontal and vertical wire grooves (11) are fixed on the inner wall of the central control cabinet (1).

3. The improved electrostatic filter centralized control device as described in claim 1, characterized in that: The high-voltage power module (2) and the mounting rail (12) are provided with a control board (21) and a wiring adapter board (22) of the same number as the high-voltage power module (2), and the high-voltage insulation terminal (3) is fixed below the high-voltage power module (2).

4. The improved electrostatic filter centralized control device as described in claim 1, characterized in that: The central control cabinet (1) and the cabinet door (14) are connected by a hinge (13). The cabinet door (14) is provided with a viewing window (15). The central control cabinet (1) is provided with a central control cabinet door lock (16) on the side away from the hinge (13).

5. The improved electrostatic filter centralized control device as described in claim 1, characterized in that: The switching device (9) includes a rocker switch (91) and a safety interlock switch (92). The safety interlock switch (92) is fixed on the side of the control cabinet (1) away from the hinge (13) and the side of the cabinet door (14) away from the hinge (13). The rocker switch (91) is fixed on the outer wall of the control cabinet (1) away from the hinge (13).

6. The improved electrostatic filter centralized control device as described in claim 1, characterized in that: The control circuit includes several ceramic columns of an electrostatic filter, several circuit boards of the same number as the ceramic columns, a leakage current circuit breaker (4), an AC contactor (5), a 24V switching power supply, a first intermediate relay KA1, a second intermediate relay KA2, a wind-sensing circuit board, a field maintenance door switch, a rocker switch (91), and a safety interlock switch (92). The first pin of the leakage current circuit breaker (4) is electrically connected to the live wire L0, the third pin of the leakage current circuit breaker (4) is electrically connected to the neutral wire N0, the second pin of the leakage current circuit breaker (4) is electrically connected to the 3 / L2 contact of the main contact of the AC contactor (5), and the fourth pin of the leakage current circuit breaker (4) is electrically connected to the 5 / L3 contact of the main contact of the AC contactor (5). (5) The line between the 3 / L2 contact of the main contact and the second pin of the residual current circuit breaker (4) is the first line 1P-L1; the line between the 5 / L3 contact of the main contact of the AC contactor (5) and the fourth pin of the residual current circuit breaker (4) is the second line 1P-N1; the T2 / 4 contact of the main contact of the AC contactor (5) is electrically connected to the third line 2P-L1; the T3 / 6 contact of the main contact of the AC contactor (5) is electrically connected to the fourth line 2P-N1; the L pin of the 24V switching power supply is electrically connected to the first line 1P-L1; the N pin of the 24V switching power supply is electrically connected to the second line 1P-N1; the PE pin of the 24V switching power supply is grounded; and the V+ pin of the 24V switching power supply is electrically connected to... The field maintenance door switch is electrically connected to a first intermediate relay KA1. The first intermediate relay KA1 is electrically connected to the V- pin of a 24V switching power supply. The line between the field maintenance door switch and the V+ pin of the 24V switching power supply is the fifth line L24. The line between the first intermediate relay KA1 and the field maintenance door switch is the seventh line L24-KA1. The line between the first intermediate relay KA1 and the V- pin of the 24V switching power supply is the sixth line N24. The IN terminal (DC24V+) of the wind sensor circuit board is electrically connected to a node of the fifth line L24. The IN terminal (DC24V-) of the wind sensor circuit board is electrically connected to a node of the sixth line N24. The O terminal of the wind sensor circuit board... The UT terminal DC24V+ pin is electrically connected to the OUT terminal DC24V- pin of the wind sensor circuit board through the second intermediate relay KA2. The 5th pin of the first intermediate relay KA1 is electrically connected to the node of the first line 1P-L1. The 9th pin of the first intermediate relay KA1 is electrically connected to the rocker switch (91). The rocker switch (91) is electrically connected to the 8th pin of the safety interlock switch (92). The 12th pin of the safety interlock switch (92) is electrically connected to the 5th pin of the second intermediate relay KA2. The 9th pin of the second intermediate relay KA2 is electrically connected to the A1 pin of the AC contactor (5) coil. The A2 pin of the AC contactor (5) coil is electrically connected to the node of the second line 1P-N1.The circuit boards are electrically connected to their respective ceramic pillars. The PE pins of all circuit boards are electrically connected to the ground line PE. The N pins of all circuit boards are electrically connected to the fourth line 2P-N1. The L pins of all circuit boards are electrically connected to the third line 2P-L1. The DClean+ pins of all circuit boards are electrically connected to the cleanup signal dry contact +. The DClean- pins of all circuit boards are electrically connected to the cleanup signal dry contact -. The DAlarm+ pins of all circuit boards are electrically connected to the alarm signal dry contact +. The DAlarm- pins of all circuit boards are electrically connected to the alarm signal dry contact -. The DRun+ pin of the first circuit board is electrically connected to the run signal dry contact +. The DRun- pin of the last circuit board is electrically connected to the run signal dry contact -. The DRun- pins of the intermediate circuit boards are electrically connected to the DRun+ pin of the next circuit board.

7. The improved electrostatic filter centralized control device as described in claim 6, characterized in that: The first live wire L0 of the first pin of the residual current circuit breaker (4) is provided with the XT1-101 terminal of the first terminal (7); the neutral wire N0 of the third pin of the residual current circuit breaker (4) is provided with the XT1-102 terminal of the first terminal (7); the ground wire PE is provided with the XT1-103 terminal of the first terminal (7); the eighth line 1P-L2 between the ninth pin of the first intermediate relay KA1 and the rocker switch (91) is provided with the XT1-104 terminal of the first terminal (7); the ninth line 1P-L3 between the eighth pin of the safety interlock switch (92) and the rocker switch (91) is provided with the XT1-105 terminal of the first terminal (7); the tenth line 1P-L4 between the 12th pin of the safety interlock switch (92) and the A1 pin of the AC contactor (5) coil is provided with the XT1-106 terminal of the first terminal (7). The cleaning signal dry contact + has a first terminal (7) in front of the XT1-107 terminal, the cleaning signal dry contact - has a first terminal (7) in front of the XT1-108 terminal, the alarm signal dry contact + has a first terminal (7) in front of the XT1-109 terminal, the alarm signal dry contact - has a first terminal (7) in front of the XT1-110 terminal, the running signal dry contact + has a first terminal (7) in front of the XT1-111 terminal, the running signal dry contact - has a first terminal (7) in front of the XT1-112 terminal, the fifth line L24 between the field maintenance door switch and the V+ pin of the 24V switching power supply has a first terminal (7) in the XT1-113 terminal, and the seventh line L24-KA1 between the field maintenance door switch and the first intermediate relay KA1 has a first terminal (7) in the XT1-114 terminal.

8. The improved electrostatic filter centralized control device as described in claim 6, characterized in that: The L pins of the circuit board are connected in pairs to the live wire L0. A second terminal (71) with half the number of circuit boards is provided between the L pins of the circuit board and the live wire L0. The N pins of the circuit board are connected in pairs to the neutral wire N0. A second terminal (71) with half the number of circuit boards is provided between the N pins of the circuit board and the neutral wire N0.

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