Switch cabinet

Abstract

A switch cabinet provided by the present invention comprises a switch cabinet shell, an air draft assembly, a circuit breaker and contact device, a partition plate assembly and fan blades, the switch cabinet shell is provided with a first air inlet and a first air outlet located at the top, the position of the first air outlet is higher than that of the first air inlet, and a handcart chamber is arranged in the switch cabinet shell. Under the condition that the air draft assembly is started, the switch cabinet shell sucks air along the first air inlet and exhausts air along the first air outlet; the partition plate assembly is arranged in the switch cabinet shell, an airflow channel is defined in the switch cabinet shell through partition of the partition plate assembly, a second air inlet is formed in one end of the airflow channel, and the other end of the airflow channel is communicated with the handcart chamber and is opposite to a pole cavity or a contact device of the circuit breaker. And external air is sucked from the second air inlet and flows to the pole cavity of the circuit breaker, so that the sliding connection point in the circuit breaker is directly cooled, or air is blown to the contact device, and therefore, the cavity of the contact device or the circuit breaker can be directly and efficiently cooled.

Description

Technical Field

[0001] The invention relates to the field of electric power equipment, and mainly to a switch cabinet. Background Art

[0002] As the green and low-carbon transformation of the power industry has been accelerating in recent years, green new energy sources such as wind power and photovoltaics have developed rapidly, and installed capacity has increased year by year. The high-voltage switchgear that plays a role in on-off protection near the power generation side has also gradually increased its rated current with the increase in installed capacity. As a type of high-voltage switchgear, switchgear is an electrical device that opens and closes, controls and protects electrical equipment during the process of power generation, transmission, distribution and energy conversion in the power system.

[0003] Among them, a major difficulty of a large current switch cabinet is how to control the temperature rise of the switch cabinet, and the difficulty of reducing the temperature rise is that the switch cabinet circuit breaker chamber is provided with a contactor and a circuit breaker pole. Since the contactor and the circuit breaker pole are made of semi-enclosed epoxy parts, and the conductor in the epoxy part is connected by sliding, the resistance value is larger. In the prior art, a fan is provided on the top of the switch cabinet to blow air to the outside of the circuit breaker or the contactor to dissipate heat, and the heat dissipation effect is poor. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, an object of the present invention is to provide a switch cabinet, which ventilates and dissipates heat for the switch cabinet by combining a first heat dissipation duct and a second heat dissipation duct, and improves the heat dissipation and cooling effect on the circuit breaker emergency contact.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] The present application proposes a switch cabinet, comprising:

[0007] The switch cabinet housing is provided with a first air inlet and a first air outlet, wherein the first air outlet is located at the top of the switch cabinet housing, the first air outlet is located higher than the first air inlet, and a trolley room is provided in the switch cabinet housing;

[0008] An air extraction component is disposed on the switch cabinet housing, and when the air extraction component is turned on, the switch cabinet housing inhales air along the first air inlet and exhausts air along the first air outlet;

[0009] A circuit breaker and a contactor, wherein the circuit breaker and the contactor are arranged in the trolley chamber, and the circuit breaker and the contactor are connected;

[0010] A partition assembly is arranged in the switch cabinet housing, and an air flow channel is defined by the partition assembly in the switch cabinet housing, one end of the air flow channel forms a second air inlet, and the other end is communicated with the trolley chamber and is opposite to the pole cavity of the circuit breaker or the contactor;

[0011] The fan blades, when turned on, allow the air flow channel to inhale air along the second air inlet and exhaust air toward the pole cavity of the circuit breaker or the contactor.

[0012] In one embodiment, the switch cabinet further includes an air guide plate, which is arranged in the air flow channel, and the air guide plate is inclined toward the pole cavity of the circuit breaker or the contactor, and is configured to guide the airflow generated by the fan blade toward the air inlet of the pole cavity of the circuit breaker or the contactor.

[0013] In one embodiment, the air guide plate is movably connected to the partition assembly so that the air guide plate can move relative to the partition assembly to adjust the inclination angle of the air guide plate.

[0014] In one embodiment, the partition assembly includes an upper partition and a lower partition, the fan blades are located in a cavity enclosed by the upper partition and the lower partition, the second air inlet is formed between the upper partition and the lower partition, one end of the air guide plate is movably connected to the lower partition, and a second air outlet is formed between the other end of the air guide plate and the upper partition, and the second air outlet is configured to supply air toward the pole cavity air inlet of the circuit breaker or the contactor.

[0015] In one embodiment, the lower partition plate is rotatably connected or slidably connected to the air guide plate.

[0016] In one embodiment, the contactor comprises an upper contactor and a lower contactor, both the upper contactor and the lower contactor are provided with a connection port for connecting with the circuit breaker, and the air guide plate is used to guide the airflow to the upper contactor and / or the lower contactor.

[0017] In one embodiment, it further comprises a cable chamber, which is located at the bottom of the switch cabinet housing, the side wall of the cable chamber is provided with the first air inlet, the position of the trolley chamber in the switch cabinet housing is higher than the position of the cable chamber, the partition assembly is located between the cable chamber and the trolley chamber, the housing of the contactor is provided with a first grille hole, and the cavity air outlet of the cable chamber is connected with the first grille hole, so that the air flow can flow into the contactor through the first grille hole;

[0018] In one embodiment, the trolley chamber is provided with a second grille hole, the cavity air outlet of the cable chamber is communicated with the second grille hole, and the second grille hole is arranged adjacent to the first grille hole.

[0019] In one embodiment, the cable room includes a cable room door, a rear cover grille, a front cover grille and a mesh partition plate, the rear cover grille plate is arranged on the cable room door, the front cover grille plate is covered on the rear cover grille plate and forms the first air inlet, the mesh partition plate is detachably arranged between the front cover grille plate and the rear cover grille plate, and the mesh partition plate is provided with a plurality of first air holes connected to the first air inlet.

[0020] In one embodiment, the upper partition of the partition assembly is connected to the cart room, or the upper partition of the partition assembly is integrated with the cart room, and the lower partition of the partition assembly is connected to the cable room door, or the lower partition of the partition assembly is integrated with the cable room.

[0021] In one embodiment, the exhaust assembly includes a mounting shell and a fan, the mounting shell is arranged on the top of the switch cabinet shell, the fan is located in the mounting shell, and a second opening is provided on a side of the mounting shell close to the switch cabinet shell, the second opening is connected to the trolley chamber, and the second opening cover is provided with a grille.

[0022] In one embodiment, a corrugated plate is further included, and the corrugated plate is located on the top of the mounting shell.

[0023] Beneficial effects:

[0024] The present application provides a switch cabinet, wherein a first air outlet is provided on the top of the switch cabinet housing, and a first air inlet is provided on the switch cabinet housing and is arranged at a position lower than the first air inlet, so that when the exhaust assembly works so that the airflow is sucked in from the first air inlet and exhausted toward the first air outlet, the height difference between the first air inlet and the first air outlet improves the exhaust effect inside the switch cabinet housing, strengthens the air convection effect inside the switch cabinet housing, and thus achieves a better heat dissipation effect. Moreover, the partition assembly separates and defines an airflow channel in the switch cabinet housing, and the air outlet end of the airflow channel faces the pole cavity or contactor of the circuit breaker. When the fan blade is turned on, the external gas is sucked in from the second air inlet and directed to the pole cavity of the circuit breaker, directly dissipating the heat to the sliding connection point in the circuit breaker, or blowing air to the contactor, so that the cavity of the contactor or the circuit breaker can be directly and efficiently dissipated.

[0025] In the present application, the first air inlet, the first air outlet and the exhaust assembly of the switch cabinet shell form a first heat dissipation duct of the switch cabinet. The first heat dissipation duct ensures that effective ventilation and heat dissipation ducts are formed in the switch cabinet shell. The partition assembly and the fan blade assembly form a second heat dissipation duct. The second heat dissipation duct specifically dissipates heat to the circuit breaker and the contactor, and exhausts air through the first air outlet on the top. In this way, the switch cabinet is cooled by the combination of the first heat dissipation duct and the second heat dissipation duct, which is beneficial to improving the heat dissipation effect and reducing the temperature rise of the circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is one of the schematic diagrams of a switch cabinet according to an embodiment of the present application;

[0027] Figure 2 This is a second schematic diagram of a switch cabinet according to an embodiment of the present application;

[0028] Figure 3 for Figure 2 A local enlarged view of point A;

[0029] Figure 4 This is one of the schematic diagrams of a partition assembly according to an embodiment of the present application;

[0030] Figure 5 This is a second schematic diagram of a partition assembly according to an embodiment of the present application;

[0031] Figure 6 This is one of the schematic diagrams of the connection between the partition assembly and the trolley chamber according to one embodiment of the present application;

[0032] Figure 7 This is a second schematic diagram of the connection between the partition assembly and the trolley chamber of an embodiment of the present application;

[0033] Figure 8 for Figure 7 A partial enlarged view of point B;

[0034] Fig. 9 A schematic diagram of a cable room according to an embodiment of the present application;

[0035] Fig.10 This is one of the schematic diagrams of an exhaust assembly according to an embodiment of the present application;

[0036] Fig.11 This is the second schematic diagram of the exhaust assembly of one embodiment of the present application.

[0037] The corresponding relationship between the reference numerals and the component names is as follows:

[0038] 1 switch cabinet housing, 101 first air inlet;

[0039] 2nd car room, 201 second grille hole;

[0040] 3 exhaust assembly, 31 mounting housing, 32 fan, 33 corrugated plate;

[0041] 4 circuit breakers, 401 pole chamber;

[0042] 5 contactor, 501 first grid hole, 51 upper contactor, 52 lower contactor;

[0043] 6 baffle assembly, 601 second air inlet, 602 second air outlet, 603 air flow channel, 61 upper baffle, 62 lower baffle;

[0044] 7 blades;

[0045] 8 wind deflector;

[0046] 9 cable room, 91 cable room door, 92 rear cover grille plate, 93 front cover grille plate, 94 mesh partition plate. DETAILED DESCRIPTION

[0047] The present invention provides a switch cabinet. In order to make the purpose, technical solution and effect of the present invention clearer and more specific, the present invention is further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention and are not used to limit the protection scope of the present invention.

[0048] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0049] In the description of the present invention, 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, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or 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 present invention can be understood according to specific circumstances.

[0050] There are two semi-enclosed epoxy parts in the circuit breaker chamber of the switch cabinet, namely the contactor and the circuit breaker pole. The conductors in the epoxy parts are connected by sliding. Since the contactor and the circuit breaker are in a semi-enclosed state, the heat cannot be dissipated. In addition, the sliding connection of the conductors in the epoxy parts makes the resistance value larger, and the heat generation is correspondingly larger, which further aggravates the heating of these two points. In the current switch cabinet, the circuit breaker chamber is mainly supplied with air by setting a fan directly, and the hot air cannot be quickly discharged outside the cabinet. Moreover, the fan in the circuit breaker chamber only blows air to the pole, but the main heating point of the pole is inside the inner cavity of the pole. The existing method can only indirectly take away the heat through the outer surface of the pole, and the heat dissipation effect is not obvious.

[0051] See also Figures 1 to 11The present application provides a switch cabinet, including a switch cabinet housing 1, an exhaust assembly 3, a circuit breaker 4 and a contactor 5, a partition assembly 6 and a fan blade 7.

[0052] The switch cabinet housing 1 is provided with a first air inlet 101 and a first air outlet. The first air outlet is located at the top of the switch cabinet housing 1. The position of the first air outlet is higher than the first air inlet 101. A trolley room 2 is provided in the switch cabinet housing 1. The trolley room 2 is used to install the circuit breaker 4 and the contactor 5. When the position of the first air outlet is designed to be higher than the first air inlet 101, the height difference between the first air inlet 101 and the first air outlet should be increased as much as possible. Moreover, the first air inlet 101 and the first air outlet can be arranged on the same side of the switch cabinet housing 1 or close to the same side. In this way, when the exhaust assembly 3 starts working, the air outside the switch cabinet housing 1 can enter the switch cabinet housing 1 along the first air inlet 101, rise along the space with a vertical slope and finally be exhausted through the first air outlet. In this way, the chimney effect can be used to effectively enhance the air convection intensity in the switch cabinet housing 1, thereby improving the ventilation and heat dissipation effect of the switch cabinet.

[0053] Preferably, the first air inlet 101 is located at the bottom of the switch cabinet housing 1. For example, the first air inlet 101 is arranged on the side wall of the switch cabinet housing 1 near the bottom, the first air outlet is arranged at the top of the trolley room 2 or the top of the circuit breaker 4 room, and the exhaust assembly 3 is arranged close to the first air outlet. In this way, a certain height difference is formed between the first air inlet 101 and the first air outlet, which is conducive to the rapid discharge of hot air in the trolley room 2 or the circuit breaker 4 room to the outside of the switch cabinet.

[0054] The exhaust component 3 is arranged in the switch cabinet housing 1. When the exhaust component 3 is turned on, the switch cabinet housing 1 draws air along the first air inlet 101 and exhausts air along the first air outlet, thereby forming a first heat dissipation duct of the switch cabinet, which effectively ventilates and dissipates heat for the components in the switch cabinet located between the first air inlet 101 and the first air outlet.

[0055] The circuit breaker 4 and the contactor 5 are arranged in the trolley room 2, and the circuit breaker 4 is connected to the contactor 5. The circuit breaker 4 is a switch device that can close, carry and disconnect the current under normal circuit conditions and can close, carry and disconnect the current under abnormal circuit conditions within a specified time. When a serious overload or circuit breaker occurs in the circuit, the circuit breaker 4 can automatically cut off the circuit to prevent the expansion of the accident and ensure safe operation. The circuit breaker 4 in the high-current switch cabinet is prone to local heating due to the large overload current, and the components inside the circuit breaker 4 will heat up accordingly, which will cause the heat dissipation capacity of the various components of the circuit breaker 4 to decrease, thereby causing internal overload, short circuit and other faults of the circuit breaker 4. Therefore, it is necessary to effectively dissipate the heat of the circuit breaker 4.

[0056] The contactor 5 is provided with a static contact. The static contact generates a lot of heat when the system is working. The heat generated by the contact cannot be quickly dissipated from the contactor 5, so that the heat accumulated in the contactor 5 is getting bigger and bigger. The temperature rise phenomenon is easy to occur at the contact part between the moving and static contacts. Long-term heating is also easy to cause contact oxidation, and the contact resistance is further increased, resulting in the destruction of the insulation structure, causing a short circuit, reducing the service life and safety performance of the equipment, and affecting the use of the switch cabinet to a certain extent. Therefore, it is necessary to dissipate heat from the contactor 5.

[0057] The partition assembly 6 is arranged on the switch cabinet housing 1. The partition assembly 6 is used to separate and define an air flow channel 603 in the switch cabinet housing 1. One end of the air flow channel 603 forms an air inlet, and the other end is connected to the trolley chamber 2 and is opposite to the pole cavity 401 of the circuit breaker 4 or the contactor 5. Figure 1 , with arrows indicating the direction of airflow. The partition assembly 6 is provided to separate and define the airflow channel 603, the outlet end of which faces the pole cavity 401 or the contactor 5 of the circuit breaker 4. When the fan blade 7 is turned on, the airflow channel 603 inhales air along the second air inlet 601 and exhausts air to the pole cavity 401 of the circuit breaker 4 or the contactor 5. The partition assembly 6 and the fan blade 7 form a second heat dissipation duct, which can specifically blow air to the pole cavity 401 of the circuit breaker 4 or the contactor 5. In this way, when blowing air toward the pole cavity 401 of the circuit breaker 4, the sliding connection point can be directly cooled. Since the heat generated at the sliding connection point is relatively large, as the main heating part of the circuit breaker, directly supplying air to this part can achieve a better heat dissipation effect.

[0058] like Figures 5 to 8 As shown, it also includes an air guide plate 8 arranged in the air flow channel 603, the air guide plate 8 is inclined toward the direction of the pole cavity 401 of the circuit breaker 4 or the contactor 5, and is configured to guide the air flow generated by the fan blade 7 to be transported toward the air inlet of the pole cavity 401 of the circuit breaker 4 or the contactor 5. The air guide plate 8 is arranged to guide the air flow in the air flow channel 603 toward the position of the air inlet of the pole cavity 401 of the circuit breaker 4 or the contactor 5, so that the air flow in the air flow channel 603 is blown more accurately to the air inlet of the pole cavity 401 of the circuit breaker 4 or the contactor 5 along the setting direction of the air guide plate 8 for heat dissipation.

[0059] Furthermore, the air guide plate 8 is movably connected to the partition assembly 6, so that the air guide plate 8 can move relative to the partition assembly 6 to adjust the inclination angle of the air guide plate 8. The air guide plate 8 is movably connected to the partition assembly 6 so as to change the air flow direction of the air guide plate 8 in the air flow channel 603. For switch cabinets of different models, or switch cabinets used in different scenarios, the main heating position may change, and the circuit breaker 4 or the contactor 5 may be the main heating point. In this way, the operating user can selectively adjust the inclination angle of the air guide plate 8 according to different heat dissipation requirements, so that the air guide plate 8 can blow the airflow toward the air inlet of the pole cavity 401 of the circuit breaker 4 or the contactor 5, so as to achieve effective heat dissipation and ventilation of the switch cabinet.

[0060] like Figure 4 and Figure 5 As shown, the partition assembly 6 includes an upper partition 61 and a lower partition 62, and the fan blade 7 is located in the cavity enclosed by the upper partition 61 and the lower partition 62. The upper partition 61 and the lower partition 62 enclose an airflow channel 603, and a second air inlet 601 is formed between the upper partition 61 and the lower partition 62. Specifically, the second air inlet 601 is located at the side wall of the partition assembly 6 close to the switch cabinet housing 1 and is connected to the outside. The partition assembly 6 is arranged to extend from the second air inlet 601 toward the direction of the circuit breaker 4 or the contactor 5 arranged in the switch cabinet housing 1. One end of the air guide plate 8 is movably connected to the lower partition 62, and the other end of the air guide plate 8 forms a second air outlet 602 between the upper partition 61. The second air outlet 602 is configured to supply air toward the air inlet of the pole cavity 401 of the circuit breaker 4 or the contactor 5. When the fan blades 7 are started, external air flows into the air flow channel 603 defined by the partition assembly 6 through the second air inlet 601, and is supplied toward the air inlet of the pole cavity 401 of the circuit breaker 4 or the contactor 5 along the inclined direction of the air guide plate 8.

[0061] Among them, one end of the air guide plate 8 can be movably connected to the lower partition plate 62 in a hinged manner.

[0062] Furthermore, in order to meet the safety performance requirements of the switch cabinet, the partition assembly 6 is provided with a grille, and a plurality of second air inlets 601 are formed on the grille.

[0063] Furthermore, the lower partition plate 62 is rotatably connected or slidably connected to the air guide plate 8 .

[0064] To give a more detailed example, the air guide plate 8 and the lower partition 62 are rotatably connected. For example, the connection between the air guide plate 8 and the lower partition 62 is hinged to form a rotation fulcrum. When the lower partition 62 is fixedly connected to the switch cabinet housing 1 or other components in the switch cabinet housing 1, the air guide plate 8 can rotate relative to the lower partition 62, so that it can selectively blow into the pole cavity 401 of the circuit breaker 4 or the contactor 5.

[0065] The air guide plate 8 is slidably connected to the lower partition plate 62. For example, the lower partition plate 62 forms a slide groove for the air guide plate 8 to slide. Optionally, a protrusion with a convex arc surface is formed in the slide groove to locate the sliding position of the air guide plate 8 along the slide groove, so as to prevent the air guide plate 8 from sliding during the heat dissipation process of the pole cavity 401 of the circuit breaker 4 or the contactor 5, thereby affecting the heat dissipation effect.

[0066] It can be understood that the partition assembly 6 and the air guide plate 8 are arranged close to the circuit breaker 4 and the contactor 5, and the air guide plate 8 is located below the circuit breaker 4 and the contactor 5, which is conducive to the air guide plate 8 to achieve better airflow diversion effect and heat dissipation effect.

[0067] like Figure 6 and Figure 7 As shown, the contactor 5 includes an upper contactor 515 and a lower contactor 525, and both the upper contactor 515 and the lower contactor 525 are provided with a connection port for connecting with the circuit breaker 4, and the air guide plate 8 is used to guide the airflow to the upper contactor 515 and the lower contactor 525. Since the upper contactor 515 and the lower contactor 525 are usually designed in the same side, only the lower contactor 525 can be cooled. By arranging the air guide plate 8 toward the direction where the upper contactor 515 and the lower contactor 525 are located, the upper contactor 515 and the lower contactor 525 can be effectively cooled.

[0068] like Figure 1 , Figure 2 and Fig. 9 As shown, the switch cabinet further includes a cable room 9, and the cables of the switch cabinet are arranged in the cable room 9. The cable room 9 is located at the bottom of the switch cabinet housing 1, and the side wall of the cable room 9 is provided with a first air inlet 101, so that a large height difference is formed between the first air inlet 101 and the first air outlet in the switch cabinet body, which is beneficial to increase the wind pressure between the first air inlet 101 and the first air outlet.

[0069] The position of the trolley chamber 2 in the switch cabinet housing 1 is higher than that of the cable chamber 9, and the partition assembly 6 is located between the cable chamber 9 and the trolley chamber 2. It can be seen that the air flow channel 603 defined by the partition assembly 6 for dissipating heat in the pole cavity 401 of the circuit breaker 4 or the contactor 5 is set at a position higher than the first air inlet 101.

[0070] like Figure 7 and Figure 8 As shown, further, a first grille hole 501 is provided in the shell of the contactor 5, and the cavity air outlet of the cable chamber 9 is connected with the first grille hole 501, so that the air flow can flow into the contactor 5 through the first grille hole 501. In this way, the cable chamber 9 and the contactor 5 can be connected through the first grille hole 501. Under the operation of the exhaust fan 32, the air flow into the contactor 5 can effectively dissipate heat and cool the contactor 5.

[0071] More specifically, a second grille hole 201 is provided on the partition of the trolley room 2, and the cavity air outlet of the cable room 9 is connected to the second grille hole 201. In this way, under the operation of the exhaust fan 32, air is sucked in through the first air inlet 101 of the cable room 9, passes through the cable room 9, thereby ventilating and cooling the cable room 9, and then flows into the trolley room 2 through the cavity air outlet of the cable room 9 toward the second grille hole 201 of the trolley room 2, and then enters the circuit breaker 4, and flows through the contactor 5 and the contact arm of the circuit breaker 4, and the heat of the circuit breaker 4 is taken away from the switch cabinet through the exhaust assembly 3 on the top of the switch cabinet, thereby ventilating and cooling the circuit breaker 4 and the contactor 5 located in the trolley room 2.

[0072] Furthermore, the second grille hole 201 is arranged adjacent to the first grille hole 501, and the second grille hole 201 of the trolley chamber 2 is connected to the first grille hole 501 of the contactor 5. After the airflow passes through the cavity air outlet of the cable chamber 9 and enters the trolley chamber 2 through the second grille hole 201 of the trolley chamber 2, it flows through the first grille hole 501 of the contactor 5 and enters the contactor 5, which can directly ventilate and dissipate heat inside the contactor 5, thereby achieving a better heat dissipation effect of the contactor 5. In this way, under the joint action of the first heat dissipation duct and the second heat dissipation duct, the first heat dissipation duct can perform overall ventilation and heat dissipation for the components such as the cable chamber 9, the contactor 5 and the circuit breaker 4 located between the first air inlet 101 and the first air outlet of the switch cabinet, and the second heat dissipation duct is provided to perform air blowing and heat dissipation for the pole cavity 401 of the contactor 5 or the circuit breaker 4 separately, thereby ensuring the heat dissipation effect of the contactor 5 or the circuit breaker 4. The first heat dissipation duct and the second heat dissipation duct are superimposed, so that the switch cabinet has a more excellent ventilation performance and achieves a better heat dissipation effect.

[0073] like Fig. 9 As shown, the cable room 9 includes a cable room door 91, a rear cover grille 92, a front cover grille 93 and a mesh partition 94. The rear cover grille 92 is arranged on the cable room door 91, the front cover grille 93 is covered on the rear cover grille 92 and forms a first air inlet 101, and a plurality of first air holes connected to the first air inlet 101 are provided on the mesh partition 94. The mesh partition 94 is detachably arranged between the front cover grille 93 and the rear cover grille 92. The mesh partition 94 can block large particles of impurities such as dust carried in the air, so that the large particles of impurities can be trapped on the mesh partition 94, so as to prevent dust from being carried into the switch cabinet with the airflow and affecting the internal electrical components. The operator can replace the mesh partition 94 without disconnecting the current, which is beneficial to improving the ventilation effect inside the switch cabinet and facilitating operation.

[0074] Further, the upper partition 61 of the partition assembly 6 is connected to the trolley chamber 2, or the upper partition 61 of the partition assembly 6 is integrated with the trolley chamber 2, and the lower partition 62 of the partition assembly 6 is connected to the cable chamber door 91, or the lower partition 62 of the partition assembly 6 is integrated with the cable chamber 9. The partition assembly 6 of the present application includes an upper partition 61 and a lower partition 62, and the upper partition 61 and the lower partition 62 enclose and define an airflow channel 603 for blowing and cooling the contactor 5 and the pole cavity 401 of the circuit breaker 4. Specifically, the partition assembly 6 is arranged between the trolley chamber 2 and the cable chamber 9, and the upper partition 61 and the lower partition 62 can be used as separate plates, or can be a partition assembly 6 composed of the lower partition 62 of the trolley chamber 2 and the upper partition 61 of the cable chamber 9. It can be understood that the partition assembly 6 of the present application is used to define the airflow channel 603, and whether it is composed of separate plates is not limited.

[0075] like Fig.10 and Fig.11 As shown, in addition to the features of the above embodiment, this embodiment further defines that: the exhaust assembly 3 includes a mounting shell 31 and a fan 32, the mounting shell 31 is arranged on the top of the switch cabinet housing 1, the fan 32 is located in the mounting shell 31, and the mounting shell 31 is provided with an opening on one side close to the switch cabinet housing 1, the opening is connected to the trolley chamber 2, and the opening cover is provided with a grille. By providing a grille on the opening cover of the mounting shell 31, a plurality of air vents are formed on the partition to avoid affecting the air outlet, and the grille can also effectively prevent the fan blades 7 from falling into the switch cabinet to damage the internal parts and cause accidents, and prevent personnel from being injured by the fan blades 7 during maintenance.

[0076] Furthermore, it also includes a corrugated plate 33, which is located on the top of the mounting shell 31. The corrugated plate 33 is provided with air holes to guide the air and also increase the speed of heat dissipation.

[0077] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of the present invention, and all these changes or substitutions should fall within the protection scope of the present invention.

Claims

1. A switch cabinet, characterized in that: include: The switch cabinet housing is provided with a first air inlet and a first air outlet, wherein the first air outlet is located at the top of the switch cabinet housing, the first air outlet is located higher than the first air inlet, and a trolley room is provided in the switch cabinet housing; an air extraction component, disposed on the switch cabinet housing, and when the air extraction component is turned on, the switch cabinet housing inhales air along the first air inlet and exhausts air along the first air outlet; A circuit breaker and a contactor, wherein the circuit breaker and the contactor are arranged in the trolley chamber, and the circuit breaker and the contactor are connected; A partition assembly is arranged in the switch cabinet housing, and an air flow channel is defined by the partition assembly in the switch cabinet housing, one end of the air flow channel forms a second air inlet, and the other end is communicated with the trolley chamber and is opposite to the pole cavity of the circuit breaker or the contactor; The fan blades, when turned on, allow the air flow channel to inhale air along the second air inlet and exhaust air toward the pole cavity of the circuit breaker or the contactor.

2. The switch cabinet according to claim 1, characterized in that: Also includes: An air guide plate is arranged in the air flow channel, and the air guide plate is inclined toward the pole cavity of the circuit breaker or the contactor, and is configured to guide the air flow generated by the fan blade toward the pole cavity air inlet of the circuit breaker or the contactor.

3. The switch cabinet according to claim 2, characterized in that: The air guide plate is movably connected to the partition assembly so that the air guide plate can move relative to the partition assembly to adjust the inclination angle of the air guide plate.

4. The switch cabinet according to claim 3, characterized in that: The partition assembly includes an upper partition and a lower partition, the fan blades are located in a cavity enclosed by the upper partition and the lower partition, the second air inlet is formed between the upper partition and the lower partition, one end of the air guide plate is movably connected to the lower partition, and a second air outlet is formed between the other end of the air guide plate and the upper partition, and the second air outlet is configured to supply air toward the pole cavity air inlet of the circuit breaker or the contactor.

5. The switch cabinet according to claim 4, characterized in that: The lower partition plate is rotatably connected or slidably connected to the air guide plate.

6. The switch cabinet according to any one of claims 2 to 5, characterized in that: The contactor comprises an upper contactor and a lower contactor, and both the upper contactor and the lower contactor are provided with a connection port for connecting with the circuit breaker, and the air guide plate is used to guide the airflow to the upper contactor and / or the lower contactor.

7. The switch cabinet according to any one of claims 1 to 5, characterized in that: It also includes a cable room located at the bottom of the switch cabinet housing, the side wall of the cable room is provided with the first air inlet, the position of the trolley room in the switch cabinet housing is higher than the position of the cable room, the partition assembly is located between the cable room and the trolley room, the housing of the contactor is provided with a first grille hole, and the cavity air outlet of the cable room is connected with the first grille hole, so that the air flow can flow into the contactor through the first grille hole; The trolley room is provided with a second grille hole, the cavity air outlet of the cable room is communicated with the second grille hole, and the second grille hole is arranged adjacent to the first grille hole.

8. The switch cabinet according to claim 7, characterized in that: The cable room comprises a cable room door, a rear cover grille plate, a front cover grille plate and a mesh partition plate, wherein the rear cover grille plate is arranged on the cable room door, the front cover grille plate is covered on the rear cover grille plate and forms the first air inlet, the mesh partition plate is detachably arranged between the front cover grille plate and the rear cover grille plate, and the mesh partition plate is provided with a plurality of first air holes communicating with the first air inlet; and / or The upper partition of the partition assembly is connected to the trolley room, or the upper partition of the partition assembly is integrated with the trolley room, and the lower partition of the partition assembly is connected to the cable room door, or the lower partition of the partition assembly is integrated with the cable room.

9. The switch cabinet according to any one of claims 1 to 5, characterized in that: The exhaust assembly includes a mounting shell and a fan, wherein the mounting shell is arranged on the top of the switch cabinet housing, and the fan is located in the mounting shell. A second opening is provided on a side of the mounting shell close to the switch cabinet housing, and the second opening is communicated with the trolley chamber, and a grille is provided on the second opening cover.

10. The switch cabinet according to claim 9, characterized in that: Also included is a corrugated plate, which is located on the top of the mounting shell.

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