Dust removal cabinet

Abstract

The utility model provides a dust removal cabinet, and relates to the technical field of dust removal devices. The dust removal cabinet comprises a cabinet body, a dust detector, a control unit and at least one fan, the dust detector is arranged in the cabinet body and is used for detecting the dust content in the cabinet body; the fan is arranged on the side wall of the cabinet body; the dust detector and the fan are electrically connected with the control unit, and the control unit is configured to drive the fan to rotate when the dust detector detects that the dust content in the cabinet body is larger than or equal to a preset value, so that the fan blows air into the cabinet body, and then the fan is driven to rotate reversely. According to the dust removal cabinet, dust in the cabinet can be removed without shutting down electrical equipment such as the converter, normal work of the converter is guaranteed, dust in the cabinet is blown up through the fan and then cleaned, and the dust removal effect of the dust removal cabinet is effectively improved.

Description

Technical Field

[0001] The present application relates to the technical field of dust removal devices, and in particular to a dust removal cabinet. Background Art

[0002] The converter is an electrical device that changes the voltage, frequency, number of phases and other electrical quantities or characteristics of the power system. In practical applications, the converter is usually installed in an electrical cabinet. Dust will accumulate inside the outdoor electrical cabinet, making it difficult for the converter to dissipate heat or even burn out components. Therefore, the electrical cabinet needs to be dusted regularly.

[0003] In the prior art, when removing dust from an electrical cabinet, it is necessary to first shut down the electrical equipment in the electrical cabinet, and then have a staff member open the electrical cabinet and use a cleaning tool to clean the inside thereof.

[0004] However, when removing dust by the above method, the electrical equipment needs to be shut down each time the dust is removed, which affects the normal operation of the converter, and there are cleaning dead corners in the electrical cabinet, and the dust removal effect of manual cleaning is poor. Utility Model Content

[0005] The present application provides a dust removal cabinet to solve the problem in the prior art that when removing dust from an electrical cabinet, it is necessary to first shut down the electrical equipment and then perform manual dust removal, which affects the normal operation of the converter and has a poor dust removal effect.

[0006] The present application provides a dust removal cabinet, comprising a cabinet body, a dust detector, a control unit and at least one fan;

[0007] The dust detector is arranged inside the cabinet to detect the dust content inside the cabinet;

[0008] The fan is arranged on the side wall of the cabinet;

[0009] The dust detector and the fan are both electrically connected to the control unit. The control unit is configured to drive the fan to rotate so that the fan blows air into the cabinet, and then drive the fan to rotate in the opposite direction when the dust detector detects that the dust content inside the cabinet is greater than or equal to a preset value.

[0010] In a possible implementation, the dust removal cabinet provided by the present application further includes a monitoring device, which is electrically connected to the dust detector to display the dust content detected by the dust detector;

[0011] The monitoring device is configured to send out an alarm signal when the dust detector detects that the dust content inside the cabinet is greater than or equal to a preset value.

[0012] In a possible implementation, the dust removal cabinet provided by the present application, the control unit includes a forward contactor and a reverse contactor, the forward contactor includes a forward coil and a forward switch, and the reverse contactor includes a reverse coil and a reverse switch;

[0013] The forward switch and the reverse switch are both normally open switches, and the two ends of the forward switch and the reverse switch are electrically connected to the three-phase power supply and the fan motor respectively;

[0014] When the dust detector detects that the dust content inside the cabinet is greater than or equal to a preset value, the forward coil is used to be electrically connected to the control power supply for a preset period of time. After the forward coil is disconnected from the control power supply, the reverse coil is used to be electrically connected to the control power supply.

[0015] In a possible implementation, the dust removal cabinet provided by the present application, the control unit further includes a time relay, a first intermediate relay, and a second intermediate relay;

[0016] The dust detector includes a detection switch, the time relay includes a first coil, a first switch and a second switch, the first intermediate relay includes a second coil and a third switch, and the second intermediate relay includes a third coil, a fourth switch and a fifth switch;

[0017] The detection switch is configured so that when the dust content inside the cabinet is greater than or equal to a preset value, the detection switch is closed;

[0018] The first switch and the fourth switch are both normally closed switches, and the second switch, the third switch and the fifth switch are all normally open switches;

[0019] The first coil forms a first branch;

[0020] The second coil, the fourth switch and the first switch are connected in series to form a second branch;

[0021] The third coil and the second switch are connected in series to form a third branch;

[0022] The third switch and the forward coil are connected in series in sequence to form a fourth branch;

[0023] The fifth switch and the reversing coil are connected in series in sequence to form a fifth branch;

[0024] One end of the detection switch is connected to the control power supply, the other end of the detection switch is electrically connected to the first branch, the second branch and the third branch, and the other ends of the first branch, the second branch and the third branch are electrically connected to the control power supply;

[0025] Both ends of the fourth branch and the fifth branch are electrically connected to the control power supply.

[0026] In a possible implementation, the dust removal cabinet provided in the present application, the control unit further includes a conversion switch, a first manual switch and a second manual switch;

[0027] One end of the transfer switch is electrically connected to the control power supply, and the other end of the transfer switch is electrically connected to both the fourth branch and the fifth branch;

[0028] One end of the first manual switch is electrically connected to the control power supply, and the other end of the first manual switch is electrically connected to the third switch and the forward rotation coil;

[0029] One end of the second manual switch is electrically connected to the control power supply, and the other end of the second manual switch is electrically connected to the fifth switch and the reversing coil.

[0030] In one possible implementation, the dust removal cabinet provided in the present application, the control unit also includes an emergency stop switch, one end of the emergency stop switch is electrically connected to the control power supply, and the other end of the emergency stop switch is electrically connected to the detection switch.

[0031] In one possible implementation, the dust removal cabinet provided in the present application also includes a forward indicator light and a reverse indicator light arranged on the outer wall of the cabinet, the forward indicator light is connected in parallel with the forward coil, and the reverse indicator light is connected in parallel with the reverse coil.

[0032] In one possible implementation, the dust removal cabinet provided in the present application further includes a power indicator light arranged on the outer wall of the cabinet, and both ends of the power indicator light are electrically connected to the control power supply.

[0033] In one possible implementation, the dust removal cabinet provided in the present application also includes an alarm indicator light arranged on the outer wall of the cabinet, one end of the alarm indicator light is electrically connected to the control power supply, and the other end of the alarm indicator light is electrically connected to the detection switch.

[0034] In a possible implementation, the dust removal cabinet provided by the present application, the control unit also includes a circuit breaker and three thermal relays;

[0035] One end of the circuit breaker is electrically connected to the three-phase power supply, and the other end of the circuit breaker is electrically connected to the forward switch and the reverse switch;

[0036] One end of a thermal relay is electrically connected to the motor, and the other end of the thermal relay is electrically connected to both the forward switch and the reverse switch;

[0037] Two thermal relays are connected in series on the fourth branch and the fifth branch respectively.

[0038] The dust removal cabinet provided by the present application detects the dust content inside the cabinet through a dust detector, and transmits the measured dust content signal to the unit. When the dust content is greater than or equal to a preset value, the control unit first controls the fan to rotate forward, so that the fan blows air into the cabinet, thereby blowing up the dust in the four corners of the cabinet and the dust attached to the electrical equipment such as the inverter, so that the dust floats in the air, and then controls the fan to rotate in the reverse direction, so that the air containing dust is discharged from the cabinet, thereby completing the dust removal work. In this way, dust removal can be performed without shutting down the electrical equipment in the dust removal cabinet, thereby ensuring the normal operation of electrical equipment such as the inverter. In addition, the dust in the cabinet is allowed to float in the air and then removed by ventilation, which can avoid missing cleaning dead corners and effectively improve the dust removal effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0040] Figure 1 A schematic diagram of the structure of the dust removal cabinet provided in the embodiment of the present application;

[0041] Figure 2 A schematic diagram of the structure of the part where the control unit provided in the embodiment of the present application is connected to the control power supply;

[0042] Figure 3 A schematic diagram of the structure of the part where the control unit provided in an embodiment of the present application is connected to a three-phase power supply.

[0043] Description of reference numerals:

[0044] 100: dust cabinet; 110: cabinet body; 120: fan; 130: dust screen; 140: forward indicator light; 150: reverse indicator light; 160: power indicator light; 170: alarm indicator light;

[0045] FR1: first thermal relay; FR2: second thermal relay; FR3: third thermal relay;

[0046] KA1-1: second coil; KA1-2: third switch; KA2-1: third coil;

[0047] KA2-2: the fourth switch; KA2-3: the fifth switch;

[0048] KM1-1: forward rotation coil; KM1-2: forward rotation switch;

[0049] KM2-1: Reversal coil; KM2-2: Reversal switch;

[0050] KT1-1: first coil; KT1-2: first switch; KT1-3: second switch;

[0051] M: motor;

[0052] QF: Circuit breaker;

[0053] SA1: detection switch;

[0054] SA2: transfer switch;

[0055] SA3: First manual switch;

[0056] SA4: Second manual switch;

[0057] SB: Emergency stop switch.

[0058] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0059] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0060] As shown in the background technology, in the prior art, dust will accumulate inside the electrical cabinet installed outdoors. When removing dust from the electrical cabinet, it is necessary to shut down the electrical equipment such as the converter inside it, and then the staff will use cleaning tools to clean it. However, in order to ensure the personal safety of the staff, the electrical equipment needs to be shut down before each dust removal in this way, which affects the normal operation of the electrical equipment such as the converter. In addition, since the electrical equipment is generally irregular in shape, there are many cleaning dead corners in the electrical cabinet, which is difficult to clean completely by manual cleaning, and the dust removal effect is poor.

[0061] In view of the above technical problems, an embodiment of the present application provides a dust removal cabinet, including a cabinet, a dust detector, a control unit and at least one fan, wherein the fan is installed on the side wall of the cabinet, and the dust detector detects the dust content inside the cabinet. When the dust content is greater than or equal to a preset value, the control unit controls the fan to blow air into the cabinet so that the dust inside the cabinet floats in the air, and then controls the fan to rotate in the opposite direction to extract the air with dust out of the cabinet, thereby completing the dust removal work. In this way, the dust removal cabinet provided by the embodiment of the present application can automatically start the dust removal work when there is a lot of dust in the cabinet, without manual cleaning. Therefore, during the dust removal process, the electrical equipment inside the cabinet can continue to work without affecting its normal operation. In addition, the dust inside the cabinet is blown up first and then cleaned, so that the cleaning dead corners in the cabinet and the dust attached to the electrical equipment can float in the air inside the cabinet, thereby improving the dust removal effect and avoiding missing cleaning dead corners.

[0062] The following specific embodiments are used to describe in detail the technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings:

[0063] See also Figure 1 As shown, the dust removal cabinet 100 of the embodiment of the present application includes a cabinet 110, a dust detector (not shown in the figure), a control unit and at least one fan 120; the dust detector is arranged inside the cabinet 110, and is used to detect the dust content inside the cabinet 110; the fan 120 is arranged on the side wall of the cabinet 110; the dust detector and the fan 120 are both electrically connected to the control unit, and the control unit is configured to drive the fan 120 to rotate when the dust detector detects that the dust content inside the cabinet 110 is greater than or equal to a preset value, so that the fan 120 blows air into the cabinet 110, and then drives the fan 120 to rotate in the opposite direction.

[0064] In the present application, at least one installation portion connecting the inside and outside of the cabinet 110 is opened on the side wall of the cabinet 110, and the fan 120 is installed in the installation portion. The dust detector detects the dust content inside the cabinet 110 in real time. When the dust content is greater than or equal to a preset value, the control unit first controls the fan 120 to rotate forward, so that the fan 120 blows air into the cabinet 110, and blows up the dust in the cleaning dead corners and attached to electrical equipment such as the inverter to make it float in the air, and then controls the fan 120 to reverse and extract the air inside the cabinet 110, thereby performing dust removal.

[0065] In this way, when the dust content in the cabinet 110 exceeds the normal value and there is a possibility of affecting the normal operation of electrical equipment such as the converter, the dust removal cabinet 100 can automatically perform dust removal work without shutting down the electrical equipment, thereby ensuring the working efficiency of the electrical equipment. In addition, when performing dust removal work, the dust is first blown up to float in the air, and then the air with dust is extracted from the dust removal cabinet 100, which can avoid missing cleaning dead corners or parts that are difficult to clean manually during cleaning, thereby improving the dust removal effect of the dust removal cabinet 100.

[0066] In order to ensure the circulation of air inside the cabinet 110 when the fan 120 is running, a vent can be opened on the side around the installation part where the fan 120 is installed, and a dustproof net 130 is set on the vent. In this way, the dust inside the cabinet 110 can be discharged from the fan 120 while preventing the dust outside the cabinet 110 from entering the cabinet 110, thereby further improving the dust removal effect. The specific structure of the vent is not limited in this application, and it is sufficient to ensure the circulation of air inside the cabinet 110 when the fan 120 is started.

[0067] In actual use, a second preset value can also be set for the control unit so that when the dust content in the air detected by the dust detector is less than or equal to the second preset value, the control unit controls the fan 120 to stop working. This can keep the dust in the cabinet 110 within a normal range. The specific values ​​of the preset value and the second preset value can be set according to actual conditions, and this application does not impose any restrictions on this.

[0068] In some possible implementations, see Figure 1 As shown, the embodiment of the present application also includes a monitoring device (not shown in the figure), which is electrically connected to the dust detector to display the dust content detected by the dust detector; the monitoring device is configured to send an alarm signal when the dust detector detects that the dust content inside the cabinet 110 is greater than or equal to a preset value.

[0069] In some embodiments, a monitoring device is provided to display the dust content of the dust detector so that the staff can check the dust situation in the dustproof cabinet at any time. When the dust content is greater than or equal to a preset value, the monitoring device sends an alarm signal, wherein the alarm signal can be sent by sending a communication device to the staff or sending a buzzer sound, etc. The specific sending method of the alarm signal is not limited in this application, and it can enable the staff to promptly discover that the dust content inside the cabinet 110 is high.

[0070] In some possible implementations, see Figure 1 , Figure 2 and Figure 3As shown, the control unit of the embodiment of the present application includes a forward contactor and a reverse contactor, the forward contactor includes a forward coil KM1-1 and a forward switch KM1-2, and the reverse contactor includes a reverse coil KM2-1 and a reverse switch KM2-2; the forward switch KM1-2 and the reverse switch KM2-2 are both normally open switches, and the two ends of the forward switch KM1-2 and the reverse switch KM2-2 are electrically connected to the three-phase power supply and the motor M of the fan 120 respectively; when the dust detector detects that the dust content inside the cabinet 110 is greater than or equal to a preset value, the forward coil KM1-1 is used to be electrically connected to the control power supply for a preset period of time, and after the forward coil KM1-1 is disconnected from the control power supply, the reverse coil KM2-1 is used to be electrically connected to the control power supply.

[0071] In the specific implementation, the motor M part of the fan 120 in the control unit controls the forward and reverse rotation of the fan 120 through the forward contactor and the reverse contactor. When the dust content inside the cabinet 110 is greater than or equal to the preset value, the control power supply is first electrically connected to the forward coil KM1-1. After the forward coil KM1-1 is energized, the forward switch KM1-2 is closed, so that the motor M is electrically connected to the three-phase power supply in a positive sequence, thereby controlling the forward rotation of the fan 120. After the fan 120 rotates forward for a preset period of time, the forward coil KM1-1 is disconnected from the control power supply, the forward switch KM1-2 is disconnected, the control power supply supplies power to the reverse coil KM2-1, and the reverse switch KM2-2 is closed, so that the motor M is electrically connected to the three-phase power supply in a reverse sequence, thereby controlling the reverse rotation of the fan 120.

[0072] In some possible implementations, see Figure 1 and Figure 2As shown, the control unit of the embodiment of the present application also includes a time relay, a first intermediate relay and a second intermediate relay; the dust detector includes a detection switch SA1, the time relay includes a first coil KT1-1, a first switch KT1-2 and a second switch KT1-3, the first intermediate relay includes a second coil KA1-1 and a third switch KA1-2, and the second intermediate relay includes a third coil KA2-1, a fourth switch KA2-2 and a fifth switch KA2-3; the detection switch SA1 is configured so that when the dust content inside the cabinet 110 is greater than or equal to a preset value, the detection switch SA1 is closed; the first switch KT1-2 and the fourth switch KA2-2 are both normally closed switches, and the second switch KT1-3, the third switch KA1-2 and the fifth switch KA2-3 are normally closed switches. The switches KA2-3 are all normally open switches; the first coil KT1-1 forms a first branch; the second coil KA1-1, the fourth switch KA2-2 and the first switch KT1-2 are connected in series to form a second branch; the third coil KA2-1 and the second switch KT1-3 are connected in series to form a third branch; the third switch KA1-2 and the forward coil KM1-1 are connected in series in sequence to form a fourth branch; the fifth switch KA2-3 and the reverse coil KM2-1 are connected in series in sequence to form a fifth branch; one end of the detection switch SA1 is connected to the control power supply, and the other end of the detection switch SA1 is electrically connected to the first branch, the second branch and the third branch, and the other ends of the first branch, the second branch and the third branch are electrically connected to the control power supply; both ends of the fourth branch and the fifth branch are electrically connected to the control power supply.

[0073] It can be understood that the control unit controls the fan 120 to rotate forward for a preset time and then reverse through the time relay, the first intermediate relay and the second intermediate relay. Specifically, when the dust detector detects that the dust content inside the cabinet 110 is greater than or equal to the preset value, the detection switch SA1 is closed, so that the first branch and the second branch are energized, and after the second coil KA1-1 in the second branch is energized, the third switch KA1-2 is closed to energize the forward coil KM1-1, and the fan 120 starts to rotate forward; after the first coil KT1-1 of the first branch is energized, the first switch KT1-2 is disconnected, and the second switch KT1-3 is closed, so that the second coil KA1-1 is de-energized, causing the third switch KA1-2 to be disconnected, so that the fan 120 stops rotating forward, and at the same time, the third coil KA2-1 of the third branch is energized, so that the fifth switch KA2-3 is closed, the reverse coil KM2-1 is energized, and the fan 120 starts to reverse. In this way, the effect of the fan 120 rotating forward first and then reversing is achieved through the delay effect of the time relay. When the dust content inside the cabinet 110 is less than or equal to the second preset value, the detection switch SA1 is disconnected, the fan 120 stops rotating, and the dust removal work is completed.

[0074] In some possible implementations, see Figure 1 and Figure 2As shown, the control unit of the embodiment of the present application also includes a conversion switch SA2, a first manual switch SA3 and a second manual switch SA4; one end of the conversion switch SA2 is electrically connected to the control power supply, and the other end of the conversion switch SA2 is electrically connected to both the fourth branch and the fifth branch; one end of the first manual switch SA3 is electrically connected to the control power supply, and the other end of the first manual switch SA3 is electrically connected to the third switch KA1-2 and the forward coil KM1-1; one end of the second manual switch SA4 is electrically connected to the control power supply, and the other end of the second manual switch SA4 is electrically connected to the fifth switch KA2-3 and the reverse coil KM2-1.

[0075] In some embodiments, the control unit is further provided with a conversion switch SA2, a first manual switch SA3, and a second manual switch SA4, thereby realizing the conversion between the manual dust removal mode and the automatic dust removal mode of the dustproof cabinet. Specifically, when the conversion switch SA2 is closed, the dust removal cabinet 100 is in the automatic dust removal mode. When the dust detector detects that the dust content inside the cabinet 110 is greater than or equal to the preset value, the third switch KA1-2 and the fifth switch KA2-3 are closed in sequence to make the fan 120 rotate forward first and then reverse. When the dust content is less than the preset value, the first manual switch SA3 or the second manual switch SA4 is pressed to close it, and the fan 120 can also be driven to rotate forward or reverse; when the conversion switch SA2 is disconnected, the third switch KA1-2 and the fifth switch KA2-3 are disconnected from the control power supply, so the forward and reverse rotation of the fan 120 cannot be controlled. The fan 120 can only be driven to rotate forward or reverse by closing the first manual switch SA3 or the second manual switch SA4.

[0076] In this way, the staff can adjust the operation mode of the dust removal cabinet 100 according to the actual situation, thereby improving the flexibility of the dust removal cabinet 100. Among them, the conversion switch SA2, the first manual switch SA3 and the second manual switch SA4 can all be set on the outer wall of the cabinet 110 for manual operation by the staff. In addition, the first manual switch SA3 and the second manual switch SA4 are also beneficial for the staff to turn on the fan 120 for heat dissipation when the temperature inside the cabinet 110 is high and affects the operation of the internal electrical equipment, thereby further ensuring the working efficiency of the internal electrical equipment of the cabinet 110.

[0077] In some possible implementations, see Figure 1 and Figure 2 As shown, the control unit of the embodiment of the present application further includes an emergency stop switch SB, one end of the emergency stop switch SB is electrically connected to the control power supply, and the other end of the emergency stop switch SB is electrically connected to the detection switch SA1.

[0078] It can be understood that an emergency stop switch SB is provided on the control unit. The emergency stop switch SB is a normally closed switch. The emergency stop switch SB can be provided on the outer wall of the cabinet 110. When an emergency occurs, the staff can stop the dust removal work in an emergency by disconnecting the emergency stop switch SB to cut off the power of the entire control unit, thereby ensuring the safety of the control unit.

[0079] In some possible implementations, see Figure 1 and Figure 2 As shown, the embodiment of the present application also includes a forward indicator light 140 and a reverse indicator light 150 arranged on the outer wall of the cabinet 110. The forward indicator light 140 is connected in parallel with the forward coil KM1-1, and the reverse indicator light 150 is connected in parallel with the reverse coil KM2-1.

[0080] It should be noted that the forward indicator light 140 and the reverse indicator light 150 are both set on the outer wall of the cabinet 110. When the forward coil KM1-1 is energized, the forward indicator light 140 is energized synchronously. When the reverse coil KM2-1 is energized, the reverse indicator light 150 is energized synchronously, so that the staff can observe the working status of the fan 120 in real time.

[0081] In some possible implementations, see Figure 1 and Figure 2 As shown, the embodiment of the present application further includes a power indicator light 160 disposed on the outer wall of the cabinet 110 , and both ends of the power indicator light 160 are electrically connected to the control power supply.

[0082] In a specific implementation, the power indicator light 160 is set on the outer wall of the cabinet 110. The staff can judge whether the power supply of the control power is normal through the power indicator light 160, so that when the control power fails, the staff can detect it in time and make adjustments.

[0083] In some possible implementations, see Figure 1 and Figure 2 As shown, the embodiment of the present application further includes an alarm indicator light 170 disposed on the outer wall of the cabinet 110 , one end of the alarm indicator light 170 is electrically connected to the control power supply, and the other end of the alarm indicator light 170 is electrically connected to the detection switch SA1 .

[0084] In some embodiments, when the dust detector detects that the dust content inside the cabinet 110 is greater than or equal to a preset value, the detection switch SA1 is closed and the alarm indicator light 170 lights up after power is turned on, which helps the staff to promptly discover the situation where the dust content inside the cabinet 110 is too high.

[0085] In some possible implementations, see Figure 2 and Figure 3As shown, the control unit of the embodiment of the present application also includes a circuit breaker QF and three thermal relays; one end of the circuit breaker QF is electrically connected to the three-phase power supply, and the other end of the circuit breaker QF is electrically connected to the forward switch KM1-2 and the reverse switch KM2-2; one end of a thermal relay is electrically connected to the motor M, and the other end of the thermal relay is electrically connected to both the forward switch KM1-2 and the reverse switch KM2-2; the two thermal relays are respectively connected in series on the fourth branch and the fifth branch.

[0086] It should be noted that the thermal relay electrically connected to the motor M is the first thermal relay FR1, the thermal relay connected in series on the fourth branch is the second thermal relay FR2, and the thermal relay connected in series on the fifth branch is the third thermal relay FR3. By setting the circuit breaker QF and the thermal relay to protect the power supply line and the motor M, the circuit is automatically cut off in the event of a serious overload or short circuit, thereby improving the safety of the dust removal cabinet 100.

[0087] In summary, the dust removal cabinet 100 of the embodiment of the present application detects the dust content inside the cabinet 110 through the dust detector. When the dust content is greater than or equal to the preset value, the control unit controls the fan 120 to rotate forward first, blow up the dust in the cabinet, and then reverse to discharge the dust, completing the dust removal work. At the same time, the detection value of the dust detector is displayed through the monitoring device, and the staff can also manually start the fan 120 for cleaning by observing the dust content. The fan 120 rotates forward first and then reverses, which can blow the dust in the cleaning dead corner into the air for cleaning. Compared with manual dust removal, the dust removal effect is better, and dust removal can be performed without shutting down electrical equipment such as the inverter in the cabinet, ensuring the normal operation of the electrical equipment.

[0088] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0089] In the embodiments of the present application, the devices or elements referred to or implied must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise precisely and specifically specified.

[0090] The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of the embodiments of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein, for example, can be implemented in an order other than those illustrated or described herein.

[0091] In addition, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus that includes a series of steps or elements is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not explicitly listed or inherent to such process, method, product, or apparatus.

[0092] It should be understood that the various numerical numbers involved in the embodiments of the present application are only used for the convenience of description and are not used to limit the scope of the embodiments of the present application.

[0093] It can be understood that in the embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0094] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the utility model disclosed herein. The present application is intended to cover any variations, uses or adaptations of the present application, which follow the general principles of the present application and include common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0095] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A dust removal cabinet, characterized in that: It includes a cabinet, a dust detector, a control unit and at least one fan; The dust detector is arranged inside the cabinet and is used to detect the dust content inside the cabinet; The fan is arranged on the side wall of the cabinet; The dust detector and the fan are both electrically connected to the control unit. The control unit is configured to drive the fan to rotate so that the fan blows air into the cabinet, and then drive the fan to rotate in the opposite direction when the dust detector detects that the dust content inside the cabinet is greater than or equal to a preset value.

2. The dust removal cabinet according to claim 1, characterized in that: Also included is a monitoring device, the monitoring device is electrically connected to the dust detector to display the dust content detected by the dust detector; The monitoring device is configured to send out an alarm signal when the dust detector detects that the dust content inside the cabinet is greater than or equal to the preset value.

3. The dust removal cabinet according to claim 1, characterized in that: The control unit comprises a forward contactor and a reverse contactor, wherein the forward contactor comprises a forward coil and a forward switch, and the reverse contactor comprises a reverse coil and a reverse switch; The forward switch and the reverse switch are both normally open switches, and both ends of the forward switch and the reverse switch are electrically connected to a three-phase power supply and a motor of the fan respectively; When the dust detector detects that the dust content inside the cabinet is greater than or equal to the preset value, the forward coil is used to be electrically connected to the control power supply for a preset period of time. After the forward coil is disconnected from the control power supply, the reverse coil is used to be electrically connected to the control power supply.

4. The dust removal cabinet according to claim 3, characterized in that: The control unit also includes a time relay, a first intermediate relay and a second intermediate relay; The dust detector includes a detection switch, the time relay includes a first coil, a first switch and a second switch, the first intermediate relay includes a second coil and a third switch, and the second intermediate relay includes a third coil, a fourth switch and a fifth switch; The detection switch is configured to close when the dust content inside the cabinet is greater than or equal to the preset value; The first switch and the fourth switch are both normally closed switches, and the second switch, the third switch and the fifth switch are all normally open switches; The first coil forms a first branch; The second coil, the fourth switch and the first switch are connected in series to form a second branch; The third coil and the second switch are connected in series to form a third branch; The third switch and the forward coil are connected in series in sequence to form a fourth branch; The fifth switch and the reversing coil are connected in series in sequence to form a fifth branch; One end of the detection switch is connected to the control power supply, the other end of the detection switch is electrically connected to the first branch, the second branch and the third branch, and the other ends of the first branch, the second branch and the third branch are electrically connected to the control power supply; Both ends of the fourth branch and the fifth branch are electrically connected to the control power supply.

5. The dust removal cabinet according to claim 4, characterized in that: The control unit also includes a conversion switch, a first manual switch and a second manual switch; One end of the conversion switch is electrically connected to the control power supply, and the other end of the conversion switch is electrically connected to both the fourth branch and the fifth branch; One end of the first manual switch is electrically connected to the control power supply, and the other end of the first manual switch is electrically connected to the third switch and the forward rotation coil; One end of the second manual switch is electrically connected to the control power supply, and the other end of the second manual switch is electrically connected to the fifth switch and the reversing coil.

6. The dust removal cabinet according to claim 4, characterized in that: The control unit also includes an emergency stop switch, one end of which is electrically connected to the control power supply, and the other end of which is electrically connected to the detection switch.

7. The dust removal cabinet according to claim 4, characterized in that: It also includes a forward indicator light and a reverse indicator light arranged on the outer wall of the cabinet, wherein the forward indicator light is connected in parallel with the forward coil, and the reverse indicator light is connected in parallel with the reverse coil.

8. The dust removal cabinet according to claim 4, characterized in that: It also includes a power indicator light arranged on the outer wall of the cabinet, and both ends of the power indicator light are electrically connected to the control power supply.

9. The dust removal cabinet according to claim 4, characterized in that: It also includes an alarm indicator light arranged on the outer wall of the cabinet, one end of the alarm indicator light is electrically connected to the control power supply, and the other end of the alarm indicator light is electrically connected to the detection switch.

10. The dust removal cabinet according to any one of claims 4 to 9, characterized in that: The control unit also includes a circuit breaker and three thermal relays; One end of the circuit breaker is electrically connected to the three-phase power supply, and the other end of the circuit breaker is electrically connected to the forward switch and the reverse switch; One end of the thermal relay is electrically connected to the motor, and the other end of the thermal relay is electrically connected to both the forward switch and the reverse switch; The two thermal relays are connected in series on the fourth branch and the fifth branch respectively.

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