Electrical cabinet and photovoltaic power generation system

Abstract

The utility model discloses an electrical cabinet and a photovoltaic power generation system. The electrical cabinet comprises a cabinet body and a heat exchanger. Wherein the cabinet body is provided with a first switch area and a second switch area, the first switch area and the second switch area are distributed on the two opposite sides of the cabinet body and are sequentially distributed in the first direction, and at least one of the first switch area and the second switch area is provided with a switch; the first switch area and the second switch area are both located in the heat dissipation air channel of the cabinet body and are distributed along the airflow direction in the heat dissipation air channel; and the heat exchanger can exchange heat with the heat dissipation air duct. According to the electrical cabinet, the heat dissipation air duct is simplified, and the heat dissipation effect is improved, so that the heat dissipation capability of the electrical cabinet is improved.

Description

Technical Field

[0001] The present application relates to the technical field of photovoltaic power generation, and more specifically, to an electrical cabinet and a photovoltaic power generation system. Background Art

[0002] In photovoltaic power generation systems, electrical cabinets (low-voltage combiner cabinets) serve as mid-end equipment between inverters and transformers.

[0003] The electrical cabinet mainly includes switches and circuit breakers, among which the switch is connected to the AC output terminal of the inverter and then connected to the circuit breaker to realize the convergence of low-voltage AC power. With the increasing demand for inverters, the structural design requirements for electrical cabinets are getting higher and higher. The heat dissipation capacity and maintainability of existing electrical cabinets are difficult to meet the requirements, and it is also difficult to meet the requirements of different power levels. Utility Model Content

[0004] In view of this, the purpose of the present application is to provide an electrical cabinet and a photovoltaic power generation system to improve the heat dissipation capacity of the electrical cabinet.

[0005] In order to achieve the above objectives, this application provides the following technical solutions:

[0006] An electrical cabinet comprises: a cabinet body and a heat exchanger;

[0007] The cabinet is provided with a first switch area and a second switch area, the first switch area and the second switch area are distributed on opposite sides of the cabinet and are distributed sequentially along a first direction, and at least one of the first switch area and the second switch area is provided with a switch;

[0008] The first switch area and the second switch area are both located in the heat dissipation air duct of the cabinet and are distributed along the air flow direction in the heat dissipation air duct; the heat exchanger can perform heat exchange with the heat dissipation air duct.

[0009] Optionally, the airflow in the heat dissipation duct flows through the first switch area and the second switch area along the first direction.

[0010] Optionally, the heat exchanger includes a first heat exchange channel and a second heat exchange channel capable of performing heat exchange, wherein the heat dissipation air duct and the second heat exchange channel are connected end to end to form an internal circulation air duct.

[0011] Optionally, the heat dissipation air duct includes: a first heat dissipation air duct, a second heat dissipation air duct and a third heat dissipation air duct which are connected in sequence;

[0012] Wherein, the first heat dissipation duct and the third heat dissipation duct are arranged side by side, and the second heat dissipation duct and the second heat exchange channel are arranged side by side;

[0013] The inlet of the first heat dissipation duct or the third heat dissipation duct is a heat dissipation inlet of the heat dissipation duct, and the outlet of the other is a heat dissipation outlet of the heat dissipation duct;

[0014] The first switch area and the second switch area are both located in the first heat dissipation duct.

[0015] Optionally, a first cabinet door is provided on the side of the cabinet having the first switch area, and a second cabinet door is provided on the side of the cabinet having the second switch area; wherein the second heat dissipation duct is provided on the inner side of the first cabinet door or the second cabinet door.

[0016] Optionally, the first heat dissipation duct is lower than the third heat dissipation duct, or the first heat dissipation duct is higher than the third heat dissipation duct;

[0017] And / or, the first heat dissipation duct is arranged along the horizontal direction, and the third heat dissipation duct is arranged along the horizontal direction.

[0018] Optionally, the heat exchanger, the heat dissipation inlet and the heat dissipation outlet are distributed on the same side of the cabinet.

[0019] Optionally, a first cabinet door is provided on the side of the cabinet having the first switch area, and a second cabinet door is provided on the side of the cabinet having the second switch area; wherein the heat exchanger is provided on the first cabinet door or the second cabinet door.

[0020] Optionally, the electrical cabinet further includes a first fan, which is disposed at a connection point between the first heat dissipation duct and the second heat dissipation duct, and is used to drive airflow from the first heat dissipation duct to the second heat dissipation duct, or from the second heat dissipation duct to the first heat dissipation duct;

[0021] And / or, the heat exchanger also includes a second fan, which is arranged at the connecting point between the third heat dissipation duct and the second heat exchange channel, and the second fan is used to drive the airflow from the third heat dissipation duct to the second heat exchange channel, or from the second heat exchange channel to the third heat dissipation duct.

[0022] Optionally, a first cabinet door is provided on a side of the cabinet having the first switch area, and a second cabinet door is provided on a side of the cabinet having the second switch area;

[0023] Among them, one of the first fan and the second fan is arranged on the first cabinet door, and the other is arranged on the second cabinet door.

[0024] Optionally, the inlet and outlet of the first heat exchange channel are both connected to the external environment of the cabinet; the heat exchanger further includes a third fan, and the third fan is used to drive the air of the external environment to flow through the first heat exchange channel;

[0025] And / or, the heat dissipation inlet and outlet of the heat dissipation air duct, and the heat exchanger are distributed on the same side of the cabinet;

[0026] And / or, the heat dissipation inlet faces the first switch area or the second switch area.

[0027] Optionally, the switches in at least one of the first switch area and the second switch area are distributed in a row along a second direction, and the second direction is perpendicular to the first direction.

[0028] Optionally, the cabinet is also provided with a circuit breaker area and a distribution area, the circuit breaker area and the first switch area are located on the same side of the cabinet, and the distribution area and the second switch are located on the same side of the cabinet; wherein the circuit breaker area and the distribution area are both located in the heat dissipation duct.

[0029] Optionally, the first switch area, the second switch area, the power distribution area and the circuit breaker area are distributed in sequence along the airflow direction; or, the circuit breaker area, the power distribution area, the second switch area and the first switch area are distributed in sequence along the airflow direction.

[0030] Optionally, the cabinet is also provided with a first wiring area and a second wiring area; the first wiring area and the first switch area are located on the same side of the cabinet, and the first wiring area and the first switch area are arranged adjacent to each other; the second wiring area and the second switch area are located on the same side of the cabinet, and the second wiring area and the second switch area are arranged adjacent to each other.

[0031] Optionally, when a first cabinet door is disposed on a side of the cabinet having the first switch area, and a second cabinet door is disposed on a side of the cabinet having the second switch area, a tray is disposed in the cabinet, and the tray is located on an inner side of at least one of the first cabinet door and the second cabinet door;

[0032] Wherein, the tray is used to install the first device; when the cabinet door corresponding to the tray is open, the first device is exposed from the cabinet body so that the first device can be maintained;

[0033] And / or, a second device is provided in the cabinet, the second device is located on the inner side of the tray, and the tray is movably provided in the cabinet; when the cabinet door corresponding to the tray is opened and the tray is moved to a set position, the second device is exposed from the cabinet so that the second device can be maintained.

[0034] Optionally, the tray is rotatably disposed in the cabinet;

[0035] And / or, the second device includes at least a fourth fan, and the fourth fan is used to drive the air flow in the heat dissipation duct to flow through a heat-generating device other than the switch.

[0036] Optionally, the heating device other than the switch is a circuit breaker.

[0037] Based on the electrical cabinet provided above, the present application also provides a photovoltaic power generation system, which includes the electrical cabinet described in any one of the above items.

[0038] The heat dissipation principle of the electrical cabinet provided in the present application is: since the first switch area and the second switch area are both located in the heat dissipation duct of the cabinet and are distributed along the air flow direction in the heat dissipation duct, the air flow in the heat dissipation duct will flow through the switches in the first switch area and the second switch area, thereby achieving heat dissipation of the switches; the heat exchanger can perform heat exchange with the heat dissipation duct, so that the heat exchanger can cool the air flow flowing through the heat dissipation duct, thereby ensuring the heat dissipation effect of the switch.

[0039] In the electrical cabinet provided by the present application, since the first switch area and the second switch area are distributed on opposite sides of the cabinet body and are distributed sequentially along the first direction, at least one of the first switch area and the second switch area is provided with a switch. This makes it easy to ensure that the heat dissipation airflow flows through the first switch area and the second switch area in turn, or the heat dissipation airflow flows through the second switch area and the first switch area in turn. Compared with the prior art, the heat dissipation duct is simplified and the heat dissipation effect is improved, thereby improving the heat dissipation capacity of the electrical cabinet, which is convenient for meeting situations with higher requirements for heat dissipation capacity.

[0040] Moreover, in the electrical cabinet provided by the present application, the airflow in the heat dissipation duct flows through the first switch area and the second switch area along the first direction, thereby improving the heat dissipation uniformity of the first switch area and the second switch area, and also improving the heat dissipation effect, thereby improving the heat dissipation capacity of the electrical cabinet, making it easier to meet situations with higher requirements for heat dissipation capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] 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 only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0042] Figure 1 An axonometric view of an electrical cabinet provided in an embodiment of the present application;

[0043] Figure 2 An axonometric diagram of an electrical cabinet with a first cabinet door and a second cabinet door opened provided in an embodiment of the present application;

[0044] Figure 3 A schematic diagram of the internal structure and heat dissipation of an electrical cabinet provided in an embodiment of the present application;

[0045] Figure 4 A schematic diagram of heat dissipation of an electrical cabinet provided in an embodiment of the present application;

[0046] Figure 5 A schematic diagram of the internal structure of an electrical cabinet on a first side provided in an embodiment of the present application;

[0047] Figure 6 A schematic diagram of the internal structure of the electrical cabinet on the second side provided in an embodiment of the present application;

[0048] Figure 7 A schematic diagram of the structure of an electrical cabinet provided in an embodiment of the present application in which a tray is arranged on the second side.

[0049] Description of reference numerals:

[0050] 1 is a cabinet body, 11 is a first cabinet door, 12 is a second cabinet door, 13 is a first side, 14 is a second side, 15 is a circuit breaker area, 16 is a first switch area, 17 is a first wiring area, 18 is a power distribution area, 19 is a second switch area, 110 is a second wiring area, 1a is a first heat dissipation duct, 1b is a second heat dissipation duct, 1c is a third heat dissipation duct, 2 is a heat exchanger, 21 is an external air inlet, 22 is an external air outlet, 23 is an internal air inlet, 24 is an internal air outlet, 2a is a first heat exchange channel, 2b is a second heat exchange channel, 3 is a switch, 31 is a load switch, 32 is a fuse, 4 is a first fan, 5 is a second fan, 6 is a second heat dissipation duct, 61 is an auxiliary air inlet, 62 is an auxiliary air outlet, 7 is a third fan, 8 is a fourth fan, and 9 is a tray. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0052] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. The terms used in the following embodiments are only for the purpose of describing specific embodiments and are not intended to be used as limitations on the present application. As used in the specification and the appended claims of the present application, the singular expressions "one", "a kind", "said", "above", "the" and "this" are intended to also include expressions such as "one or more", unless there is a clear contrary indication in the context. It should also be understood that in the embodiments of the present application, "one or more" refers to one, two or more; "and / or" describes the association relationship of the associated objects, indicating that three relationships may exist; for example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the objects associated before and after are in an "or" relationship.

[0053] References to "one embodiment" or "some embodiments" etc. described in this specification mean that a particular feature, structure or characteristic described in conjunction with the embodiment is included in one or more embodiments of the present application. Thus, the phrases "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear at different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0054] The multiple involved in the embodiments of the present application means greater than or equal to two. It should be noted that in the description of the embodiments of the present application, the words "first", "second", etc. are only used for the purpose of distinguishing the description, and cannot be understood as indicating or implying relative importance, nor can they be understood as indicating or implying an order.

[0055] The "parallel" and "perpendicular" involved in this application are "substantially parallel" and "substantially perpendicular" in actual operation. "Substantially parallel" can be understood as parallel with a certain error, and similarly, "substantially perpendicular" can be understood as perpendicular with a certain error.

[0056] The electrical cabinet mentioned in this application can be an AC electrical cabinet, such as a photovoltaic grid-connected low-voltage junction cabinet, a low-voltage junction cabinet, etc. The electrical cabinet can be an important component of the inverter output and the AC distribution cabinet or step-up transformer input, and can collect the AC power output by multiple inverters before outputting it, greatly simplifying the connection line between the inverter and the AC distribution cabinet or step-up transformer. At the same time, the access of the electrical cabinet, as the output disconnection point of the inverter, can also protect the inverter from the harm from the AC power grid, improve the safety of the system, and protect the safety of the installation and maintenance personnel.

[0057] The embodiment of the present application provides an electrical cabinet, simplifies the heat dissipation duct, improves the heat dissipation effect, and thus improves the heat dissipation capacity of the electrical cabinet, which is convenient for meeting the situation with higher demand for heat dissipation capacity.

[0058] like Figure 1 and Figure 2 As shown, the electrical cabinet provided in the embodiment of the present application includes: a cabinet body 1 and a heat exchanger 2.

[0059] like Figure 3 As shown, the cabinet 1 is provided with a first switch area 16 and a second switch area 19 , and the first switch area 16 and the second switch area 19 are distributed on opposite sides of the cabinet 1 and are distributed sequentially along a first direction.

[0060] like Figure 5 and Figure 6 As shown, both the first switch area 16 and the second switch area 19 are provided with switches 3. Of course, it is also possible to select only one of the first switch area 16 and the second switch area 19 to be provided with a switch 3.

[0061] In the case where switches 3 are provided in the first switch area 16, there may be one or more than two switches 3 in the first switch area 16, which is selected according to actual conditions, and this embodiment does not limit this. In order to facilitate the arrangement of switches 3, the switches 3 in the first switch area 16 may be arranged in rows along the second direction, and the second direction is perpendicular to the first direction. In the first switch area 16, the switches 3 may be in one row or more than two rows. The number of rows of switches 3 is selected according to actual conditions, and this embodiment does not limit this.

[0062] In the case where switches 3 are provided in the second switch area 19, the switches 3 in the second switch area 19 may be one or more than two, which is selected according to actual conditions, and this embodiment does not limit this. In order to facilitate the arrangement of switches 3, the switches 3 in the second switch area 19 may be arranged in rows along a second direction, and the second direction is perpendicular to the first direction. In the second switch area 19, the switches 3 may be in one row or more than two rows. The number of rows of switches 3 is selected according to actual conditions, and this embodiment does not limit this.

[0063] In actual situations, the first direction and the second direction may be perpendicular to the vertical direction. For example, the first direction is the length direction of the cabinet 1, and the second direction is the width direction of the cabinet 1; or the first direction is the width direction of the cabinet 1, and the second direction is the length direction of the cabinet 1.

[0064] Of course, the first switch area 16 and the second switch area 19 may also be selected to be distributed in sequence along other directions, which is not limited in this embodiment.

[0065] The number of switches 3 in the first switch area 16 and the number of switches 3 in the second switch area 19 may be the same or different, depending on actual conditions.

[0066] When the number of switches 3 in the first switch area 16 is the same as the number of switches 3 in the second switch area 19, the switches 3 in the first switch area 16 and the switches 3 in the second switch area 19 can be symmetrically distributed. For example, the switches 3 in the first switch area 16 are first switches, and the switches 3 in the second switch area 19 are second switches, and the first switches and the second switches are symmetrically distributed. In order to facilitate the operation of the switches 3, the operating surface of the first switch and the operating surface of the second switch are separated from each other, which can be understood as the operating surface of the first switch is located on the side of the first switch away from the second switch, and the operating surface of the second switch is located on the side of the second switch away from the first switch.

[0067] In actual situations, the first switches and the second switches may also be selected to be distributed asymmetrically, which is not limited to the above embodiment.

[0068] like Figure 5 and Figure 6 As shown, the switch 3 includes a load switch 31 and a fuse 32, wherein one end of the fuse 32 is used to be electrically connected to the AC output side of the inverter, and the other end of the fuse 32 is electrically connected to the load switch 31. Of course, the switch 3 can be selected to have other structures, which is not limited in this embodiment.

[0069] In the embodiment of the present application, the first switch area 16 and the second switch area 19 are both located in the heat dissipation duct of the cabinet 1 and are distributed along the air flow direction in the heat dissipation duct.

[0070] Exemplarily, the first switch area 16 and the second switch area 19 are distributed in sequence along the air flow direction in the heat dissipation air duct, that is, the cold air flow first flows through the first switch area 16 and then flows through the second switch area 19; or, the second switch area 19 and the first switch area 16 are distributed in sequence along the air flow direction in the heat dissipation air duct, that is, the cold air flow first flows through the second switch area 19 and then flows through the first switch area 16.

[0071] In the embodiment of the present application, the heat exchanger 2 can perform heat exchange with the heat dissipation duct. Exemplarily, the heat exchanger 2 is connected to the heat dissipation duct and is used to cool the airflow flowing through the heat dissipation duct. The specific structure of the heat exchanger 2 is selected according to actual conditions, and this embodiment does not limit this.

[0072] The heat dissipation principle of the electrical cabinet provided in the above embodiment is: since the first switch area 16 and the second switch area 19 are both located in the heat dissipation duct of the cabinet body 1 and are distributed along the air flow direction in the heat dissipation duct, the air flow in the heat dissipation duct will flow through the switch 3 in the first switch area 16 and the second switch area 19, thereby achieving heat dissipation of the switch 3; the heat exchanger 2 cools the air flow flowing through the heat dissipation duct, thereby ensuring the heat dissipation effect of the switch 3.

[0073] The above heat dissipation method abandons the direct ventilation heat dissipation design and adopts the heat exchange heat dissipation form, which improves the IP level of the electrical cabinet.

[0074] In the electrical cabinet provided by the above embodiment, since the first switch area 16 and the second switch area 19 are distributed on opposite sides of the cabinet body 1 and are distributed sequentially along the first direction, at least one of the first switch area 16 and the second switch area 19 is provided with a switch 3. This makes it easy to ensure that the airflow in the heat dissipation duct flows through the first switch area 16 and the second switch area 19 in turn, or the airflow in the heat dissipation duct flows through the second switch area 19 and the first switch area 16 in turn. Compared with the prior art, the heat dissipation duct is simplified and the heat dissipation effect is improved, thereby improving the heat dissipation capacity of the electrical cabinet, which is convenient for meeting the situation with higher demand for heat dissipation capacity.

[0075] In some embodiments, the airflow in the heat dissipation duct flows along the first direction through the first switch area 16 and the second switch area 19. In this way, the heat dissipation uniformity of the first switch area 16 and the heat dissipation uniformity of the second switch area 19 are improved, especially when the switches 3 are arranged in rows along the second direction, so that the heat dissipation effect is effectively improved, and then the heat dissipation capacity of the electrical cabinet is improved, which is convenient for meeting the situation with high demand for heat dissipation capacity.

[0076] Exemplarily, the first direction is the length direction of the cabinet 1, and the airflow in the heat dissipation duct flows through the first switch area 16 and the second switch area 19 along the length direction of the cabinet 1. Alternatively, the first direction is the width direction of the cabinet 1, and the airflow in the heat dissipation duct flows through the first switch area 16 and the second switch area 19 along the width direction of the cabinet 1.

[0077] It should be noted that the airflow in the heat dissipation duct may first flow through the first switch area 16 and then flow through the second switch area 19 , or may first flow through the second switch area 19 and then flow through the first switch area 16 .

[0078] like Figure 1 and Figure 2As shown, in order to facilitate operation and maintenance of the switch 3, a first cabinet door 11 is provided on the side of the cabinet 1 having the first switch area 16, and a second cabinet door 12 is provided on the side of the cabinet having the second switch area 19. Exemplarily, the first side 13 and the second side 14 of the cabinet 1 are relatively distributed. The first switch area 16 and the first cabinet door 11 are both located on the first side 13 of the cabinet 1, and the second switch area 19 and the second cabinet door 12 are both located on the second side 14 of the cabinet 1.

[0079] The first cabinet door 11 and the second cabinet door 12 can both open and close the cabinet body 1. In this way, the switches 3 in the first switch area 16 can be maintained by opening the first cabinet door 11, and the switches 3 in the second switch area 19 can be maintained by opening the second cabinet door 12. In this way, the maintainable operation surface of the electrical cabinet is increased, and the maintainability of the electrical cabinet is effectively improved.

[0080] As mentioned above, the switches 3 in the first switch area 16 and the second switch area 19 are arranged in a row along the second direction, and the second direction is perpendicular to the first direction. In this way, it is convenient to increase or decrease the number of switches 3, and the number of input paths of the switches 3 can be increased or decreased by increasing or decreasing the number of switches 3, so that different whole machine powers can be achieved, which is convenient for meeting the needs of different power levels; it can also improve the power density of the whole machine and shorten the later maintenance time.

[0081] In order to facilitate opening and closing of the cabinet 1, the first cabinet door 11 and the second cabinet door 12 can be rotatably arranged on the cabinet 1. Exemplarily, the first cabinet door 11 and the second cabinet door 12 are rotatably arranged on the cabinet 1 through hinges.

[0082] In the embodiment of the present application, the cabinet body 1 may also be provided with other cabinet doors, for example, cabinet doors may be provided on sides other than the first side 13 and the second side 14. The manner of opening and closing the cabinet doors is selected according to actual conditions, and this embodiment does not limit this.

[0083] like Figure 4 As shown, in the embodiment of the present application, the heat exchanger 2 includes a first heat exchange channel 2a and a second heat exchange channel 2b capable of heat exchange, wherein the heat dissipation air channel and the second heat exchange channel 2b are connected end to end to form an internal circulation air channel. The first heat exchange channel 2a is used to cool the second heat exchange channel 2b.

[0084] It should be noted that the heat dissipation inlet and the heat dissipation outlet of the heat dissipation duct are both connected to the heat exchanger 2. The airflow cooled by the heat exchanger 2 enters the heat dissipation duct from the heat dissipation inlet, and the hot air in the heat dissipation duct flows to the heat exchanger 2 through the heat dissipation outlet.

[0085] In order to facilitate the formation of an internal circulation air duct, the heat dissipation air duct includes: a first heat dissipation air duct 1a, a second heat dissipation air duct 1b and a third heat dissipation air duct 1c which are connected in sequence; wherein the first heat dissipation air duct 1a and the third heat dissipation air duct 1c are arranged side by side, and the second heat dissipation air duct 1b and the second heat exchange channel 2b are arranged side by side; in the first heat dissipation air duct 1a or the third heat dissipation air duct 1c, the inlet of one is the heat dissipation inlet of the heat dissipation air duct, and the outlet of the other is the heat dissipation outlet of the heat dissipation air duct; the first switch area 16 and the second switch area 19 are both located in the first heat dissipation air duct 1a. It should be noted that the first switch area 16 or the second switch area 19 is close to the second heat dissipation air duct 1b.

[0086] Since the switches 3 in the first switch area 16 and the second switch area 19 generate a large amount of heat, the inlet of the first heat dissipation duct 1a can be selected as the heat dissipation inlet of the heat dissipation duct, and the outlet of the third heat dissipation duct 1c can be selected as the heat dissipation outlet of the heat dissipation duct. In this way, the cold airflow discharged from the heat exchanger 2 first flows through the first switch area 16 and the second switch area 19, thereby improving the heat dissipation effect of the switches 3.

[0087] In order to facilitate the formation of the second heat dissipation duct 1b, the second heat dissipation duct 1b can be selected to be arranged on the inner side of the first cabinet door 11 or the second cabinet door 12. In this way, it is also convenient to maintain the second heat dissipation duct 1b.

[0088] In order to facilitate the flow of air in the internal circulation air duct, on the one hand, the first heat dissipation air duct 1a can be selected to be lower than the third heat dissipation air duct 1c, or the first heat dissipation air duct 1a can be selected to be higher than the third heat dissipation air duct 1c. Since the first switch area 16 and the second switch area 19 are both located in the first heat dissipation air duct 1a, in order to facilitate the operation of the switch 3, the first heat dissipation air duct 1a can be selected to be lower than the third heat dissipation air duct 1c.

[0089] When the first heat dissipation duct 1a is lower than the third heat dissipation duct 1c, or the first heat dissipation duct 1a is higher than the third heat dissipation duct 1c, the heat dissipation inlet and the heat dissipation outlet can be sequentially distributed along the vertical direction; the second heat dissipation duct 1b and the second heat exchange duct 2b can be sequentially distributed along the first direction, the second heat dissipation duct 1b is arranged along the vertical direction, and the second heat exchange duct 2b is arranged along the vertical direction. In this way, the structure of the heat dissipation duct is also simplified.

[0090] In order to facilitate the flow of air in the inner circulation air duct, on the other hand, the first heat dissipation air duct 1a can be arranged in a horizontal direction, and the third heat dissipation air duct 1c can be arranged in a horizontal direction. Exemplarily, the first heat dissipation air duct 1a is arranged in a first direction, and the third heat dissipation air duct 1c is arranged in a first direction. In this way, the inner circulation air duct can also be simplified.

[0091] The above two aspects can be implemented separately or simultaneously (combined) according to the actual situation, and the embodiment of the present application does not limit this. When the above two aspects are implemented simultaneously, the airflow in the internal circulation air duct is facilitated to the greatest extent, and the internal circulation air duct is simplified.

[0092] In order to simplify the structure of the heat exchanger 2 and to simplify the installation of the heat exchanger 2, the heat exchanger 2, the heat dissipation inlet and the heat dissipation outlet are distributed on the same side of the cabinet 1. Figure 2 As shown, the first side 13 and the second side 14 of the cabinet 1 are arranged relatively. The first switch area 16 is located on the first side 13 of the cabinet 1, and the second switch area is located on the second side 14 of the cabinet 1. The heat exchanger 2, the heat dissipation inlet and the heat dissipation outlet are all distributed on the first side 13 or the second side 14 of the cabinet 1. In this case, the heat exchanger 2 can be selected to be arranged on the first cabinet door 11 or the second cabinet door 12.

[0093] When the heat exchanger 2 is disposed on the first cabinet door 11 , the second heat exchange channel 2 b may be disposed on the second cabinet door 12 ; or, when the heat exchanger 2 is disposed on the second cabinet door 12 , the second heat exchange channel 2 b may be disposed on the first cabinet door 11 .

[0094] The heat exchanger 2 may be located inside the cabinet 1 or outside the cabinet 1. In order to reduce the volume of the cabinet 1, the heat exchanger 2 may be located outside the cabinet 1.

[0095] Combination Figure 3 and Figure 4 As shown, in some embodiments, in order to ensure that the airflow circulates in the internal circulation air duct, the electrical cabinet further includes a first fan 4, and / or the heat exchanger 2 further includes a second fan 5. Exemplarily, the electrical cabinet may further include the first fan 4, the heat exchanger 2 may further include the second fan 5, or the electrical cabinet may further include the first fan 4 and the heat exchanger 2 may further include the second fan 5.

[0096] The first fan 4 is arranged at the connection point between the first heat dissipation air duct 1a and the second heat dissipation air duct 1b, and the first fan 4 is used to drive the air flow from the first heat dissipation air duct 1a to the second heat dissipation air duct 1b, or from the second heat dissipation air duct 1b to the first heat dissipation air duct 1a. The first fan 4 can be arranged in the first heat dissipation air duct 1a or the second heat dissipation air duct 1b. In this way, it is convenient for the air flow to pass through the first heat dissipation air duct 1a and the second heat dissipation air duct 1b, so as to facilitate the air flow to circulate in the inner circulation air duct.

[0097] The second fan 5 is arranged at the connection point between the third heat dissipation air duct 1c and the second heat exchange channel 2b, and the second fan 5 is used to drive the airflow from the third heat dissipation air duct 1c to the second heat exchange channel 2b, or from the second heat exchange channel 2b to the third heat dissipation air duct 1c. The second fan 5 is a part of the heat exchanger 2, and the second fan 5 can be arranged in the second heat exchange channel 2b. In this way, it is convenient for the airflow to pass through the third heat dissipation air duct 1c and the second heat exchange channel 2b, so as to facilitate the airflow to circulate in the inner circulation air duct.

[0098] When the first heat dissipation duct 1a and the third heat dissipation duct 1c are distributed in sequence along the vertical direction (the first heat dissipation duct 1a is lower than the third heat dissipation duct 1c, or the first heat dissipation duct 1a is higher than the third heat dissipation duct 1c), and the second heat dissipation duct 1b and the second heat exchange channel 2b are distributed in sequence along the first direction, the first fan 4 and the second fan 5 can both be centrifugal fans. Compared with the axial flow fan used in the electrical cabinet in the prior art, the centrifugal fan has a larger air volume and air pressure, which effectively increases the air flow rate in the heat dissipation duct, effectively improves the heat dissipation performance, and can also reduce the heat dissipation cost.

[0099] Of course, the first fan 4 and the second fan 5 may also be selected to be other types, and are not limited to centrifugal fans.

[0100] In actual application, a fan may also be provided at the connection point between the second heat dissipation duct 1b and the third heat dissipation duct 1c to drive the air flow from the second heat dissipation duct 1b to the third heat dissipation duct 1c, or from the third heat dissipation duct 1c to the second heat dissipation duct 1b.

[0101] In order to facilitate the installation of the first fan 4 and the second fan 5, the first fan 4 can be selected to be installed in the second heat dissipation duct 1b. In this case, one of the first fan 4 and the second fan 5 can be selected to be installed in the first cabinet door 11 and the other can be installed in the second cabinet door 12. In this way, it is convenient to install and maintain the first fan 4 and the second fan 5. It should be noted that when the second fan 5 is installed in the first cabinet door 11, it indicates that the heat exchanger 2 is installed in the first cabinet door 11; when the second fan 5 is installed in the second cabinet door 12, it indicates that the heat exchanger 2 is installed in the second cabinet door 12.

[0102] In the heat exchanger 2, the first heat exchange channel 2a can flow through gas or liquid, which can be selected according to actual conditions. In order to reduce the heat dissipation cost, the inlet and outlet of the first heat exchange channel 2a are both connected to the external environment of the cabinet 1, that is, the first heat exchange channel 2a is used to connect to the external environment of the power cabinet. Figure 3 and Figure 4 As shown, in order to improve the heat exchange efficiency, the airflow directions in the first heat exchange channel 2a and the second heat exchange channel 2b can be selected to be opposite.

[0103] Exemplary, combined Figure 1-Figure 3 As shown, the heat exchanger 2 is provided with an external air inlet 21, an external air outlet 22, an internal air inlet 23 and an internal air outlet 24. The external air inlet 21 and the external air outlet 22 are both connected to the first heat exchange channel 2a, and the internal air inlet 23 and the internal air outlet 24 are both connected to the second heat exchange channel 2b; the air from the external environment enters the first heat exchange channel 2a through the external air inlet 21, and then is discharged to the external environment through the external air outlet 22; the air in the heat dissipation duct enters the second heat exchange channel 2b through the internal air inlet 23, and then enters the heat dissipation duct through the internal air outlet 24.

[0104] In order to facilitate airflow through the first heat exchange channel 2a, the heat exchanger 2 further includes a third fan 7, which is used to drive air from the external environment to flow through the first heat exchange channel 2a.

[0105] When the heat exchanger 2 is disposed on the first cabinet door 11 , the third fan 7 is disposed on the first cabinet door 11 ; when the heat exchanger 2 is disposed on the second cabinet door 12 , the third fan 7 is disposed on the second cabinet door 12 .

[0106] In some other embodiments, the structure of the heat dissipation duct may also be other.

[0107] In order to facilitate the formation of the inner circulation air duct, the heat dissipation inlet and outlet of the heat dissipation air duct and the heat exchanger 2 can be selected to be distributed on the same side of the cabinet 1. In this case, the inlet and outlet of the first heat exchange channel 2a can be selected to be connected to the external environment of the cabinet 1, and the heat exchanger 2 also includes a third fan 7, which is used to drive the air from the external environment to flow through the first heat exchange channel 2a. In this way, it is convenient to form the inner circulation air duct while also facilitating the cooling of the airflow in the inner circulation air duct. Of course, the inlet and outlet of the first heat exchange channel 2a can be selected to be connected to others, and are not limited to the above situation.

[0108] In the electrical cabinet, the switch 3 generates a large amount of heat and is heat sensitive. In order to improve the heat dissipation effect of the switch 3, the heat dissipation inlet of the heat dissipation duct can be selected to face the first switch area 16 or the second switch area 19. In this case, the type of the heat exchanger 2 is not limited. For example, the inlet and outlet of the first heat exchange channel 2a can be selected to be connected to the external environment of the cabinet 1. The heat exchanger 2 also includes a third fan 7, which is used to drive the air of the external environment to flow through the first heat exchange channel 2a. In this way, while improving the heat dissipation effect of the switch 3, it is also convenient to cool the airflow in the internal circulation duct.

[0109] It should be noted that when the heat dissipation inlet is distributed on the first side 13 , the heat dissipation inlet faces the first switch area 16 ; when the heat dissipation inlet is distributed on the second side 14 , the heat dissipation inlet faces the second switch area 19 .

[0110] The fuse 32 in the switch 3 generates a large amount of heat and has a strong thermal sensitivity. To improve the heat dissipation effect, the heat dissipation inlet of the heat dissipation duct may be selected to face the fuse 32 in the first switch area 16 or the fuse 32 in the second switch area 19. In actual situations, the heat dissipation inlet of the heat dissipation duct may also be selected to face other components, which is not limited in this embodiment.

[0111] In some embodiments, the heat dissipation inlet and outlet of the heat dissipation duct and the heat exchanger 2 can be arranged on the same side of the cabinet 1, and the heat dissipation inlet of the heat dissipation duct faces the first switch area 16 or the second switch area 19. In this way, the heat dissipation effect of the switch 3 is improved while facilitating the formation of the internal circulation duct.

[0112] In some embodiments, the electrical cabinet further includes a circuit breaker and a power distribution module. Figure 3 , Figure 5 and Figure 6 As shown, the cabinet 1 is further provided with a circuit breaker area 15 and a distribution area 18, wherein the circuit breaker area 15 is used to place circuit breakers, and the distribution area 18 is used to place distribution modules, the circuit breaker area 15 and the first switch area 16 are located on the same side of the cabinet 1, and the distribution area 18 and the second switch area 19 are located on the same side of the cabinet 1.

[0113] Exemplarily, the circuit breaker area 15 and the first switch area 16 are both located on the first side 13 of the cabinet 1 , and the power distribution area 18 and the second switch area 19 are both located on the second side 14 of the cabinet 1 .

[0114] In order to facilitate wiring, the circuit breaker area 15 and the first switch area 16 may be distributed in sequence along the vertical direction, and the power distribution area 18 and the second switch area 19 may be distributed in sequence along the vertical direction.

[0115] On the one hand, the circuit breaker area 15 can be selected to be located on the top side of the first switch area 16, and the distribution area 18 can be located on the top side of the second switch area 19. On the other hand, the circuit breaker area 15 can be selected to be located on the bottom side of the first switch area 16, and the distribution area 18 can be located on the bottom side of the second switch area 19.

[0116] The above-mentioned circuit breaker area 15 and power distribution area 18 are both located in the heat dissipation air duct, and the first switch area 16, the second switch area 19, the circuit breaker area 15 and the power distribution area 18 are distributed along the air flow direction in the heat dissipation air duct according to a set sequence.

[0117] In the case where the heat dissipation air duct includes the first heat dissipation air duct 1a, the second heat dissipation air duct 1b and the third heat dissipation air duct 1c, the circuit breaker area 15 and the power distribution area 18 can be selected to be located in the third heat dissipation air duct 1c. In this case, the first switch area 16, the second switch area 19, the power distribution area 18 and the circuit breaker area 15 can be selected to be distributed in sequence along the airflow direction, so that the cold airflow from the heat exchanger can first flow through the first switch area 16 and the second switch area 19, thereby improving the heat dissipation effect of the switch 3; or the circuit breaker area 15, the power distribution area 18, the second switch area 19 and the first switch area 16 are distributed in sequence along the airflow direction, so that the cold airflow from the heat exchanger can first flow through the circuit breaker area 15 and the power distribution area 18, and then flow through the first switch area 16 and the second switch area 19, thereby improving the heat dissipation effect of the components in the circuit breaker area 15 and the power distribution area 18.

[0118] Combination Figure 3 , Figure 5 and Figure 6 As shown, in some embodiments, in order to facilitate wiring, the cabinet 1 can be optionally provided with a first wiring area 17 and a second wiring area 110, the first wiring area 17 and the first switch area 16 are located on the same side of the cabinet 1, and the first wiring area 17 and the first switch area 16 are adjacent to each other, and the second wiring area 110 and the second switch area 19 are located on the same side of the cabinet 1, and the second wiring area 110 and the second switch area 19 are adjacent to each other.

[0119] Exemplarily, the first wiring area 17 is located at the bottom end of the first switch area 16 , and the second wiring area 110 is located at the bottom end of the second switch area 19 .

[0120] In the embodiment of the present application, in order to simplify the structure of the electrical cabinet, the circuit breaker area 15 and the distribution area 18 can be symmetrically distributed, the first wiring area 17 and the second wiring area 110 can be symmetrically distributed, and the first switch area 16 and the second switch area 19 can be symmetrically distributed.

[0121] It should be noted that the above-mentioned areas do not include the devices arranged in each area.

[0122] As mentioned above, the cabinet 1 has a first cabinet door 11 and a second cabinet door 12. Figure 7 As shown, in some embodiments, a movable tray 9 is disposed in the cabinet 1 , and the tray 9 is located on the inner side of at least one of the first cabinet door 11 and the second cabinet door 12 .

[0123] The tray 9 is used to install the first device; when the cabinet door corresponding to the tray 9 is open, the first device is exposed to the cabinet body 1 so that the first device can be maintained. In this way, the maintenance of the first device is convenient without disassembling any structural parts and wiring harnesses, etc., which improves the maintainability of the electrical cabinet.

[0124] It should be noted that, when the first device does not need maintenance, the cabinet doors (the first cabinet door 11 and / or the second cabinet door 12) corresponding to the tray 9 can be closed.

[0125] The first device on the tray 9 may include: a counter device and / or a power distribution circuit device. The power distribution circuit device may include a power distribution control template and a temperature control device, etc., which are not limited in this embodiment. Of course, the first device on the tray 9 may also include other devices, which are not limited in this embodiment.

[0126] In order to improve the maintainability of the electrical cabinet, a second device may be optionally provided in the cabinet 1, and the second device is located on the inner side of the tray 9. The outer side of the tray 9 faces the cabinet door corresponding to the tray 9, and the inner side of the tray 9 faces away from the cabinet door corresponding to the tray 9. The tray 9 is movably provided in the cabinet 1; when the cabinet door corresponding to the tray 9 is open and the tray 9 is moved to the set position, the second device is exposed to the cabinet 1 so that the second device can be maintained. In this way, the second device can be maintained by opening the corresponding cabinet door and removing the tray 9, without disassembling any structural parts and wiring harnesses, etc., thereby improving the maintainability of the electrical cabinet.

[0127] In order to facilitate maintenance of the second device, the tray 9 can be rotatably arranged in the cabinet 1. Exemplarily, the tray 9 is rotatably arranged in the cabinet 1 through a hinge.

[0128] Of course, the tray 9 may be movably arranged in a straight line in the cabinet 1 or the tray 9 may be moved in other ways, which is not limited to the above embodiments.

[0129] The second device at least includes a fourth fan 8, and the fourth fan 8 is used to drive the airflow in the heat dissipation air duct to flow through the heat generating devices other than the switch 3. In this way, the installation and maintenance of the fourth fan 8 are convenient.

[0130] In some embodiments, the heating device other than the switch 3 is a circuit breaker. In the case where the circuit breaker area 15 is located in the third heat dissipation duct 1c, the fourth fan 8 can also be arranged in the third heat dissipation duct 1c.

[0131] The above-mentioned second device may also include at least one of a voltage transformer and a lightning arrester, which is not limited in the embodiment of the present application.

[0132] It should be noted that the tray 9 can be used to install the first device and the cabinet 1 can be provided with the second device at the same time, which further improves the maintainability of the electrical cabinet. Of course, the tray 9 can be used to install the first device and the cabinet 1 can be provided with the second device, which can also be implemented separately.

[0133] As mentioned above, the heat exchanger 2 can be arranged on the first cabinet door 11 or the second cabinet door 12. For ease of installation, one of the tray 9 and the heat exchanger 2 can be arranged on the first cabinet door 11 and the other on the second cabinet door 12.

[0134] Based on the electrical cabinet provided in the above embodiment, an embodiment of the present application further provides a photovoltaic power generation system, which includes the electrical cabinet described in the above embodiment.

[0135] The electrical cabinet is connected to the inverter and the transformer, wherein the inverter is converged through the electrical cabinet and transmitted to the transformer.

[0136] The electrical cabinet may be a junction cabinet or other types, which is not limited in the embodiments of the present application.

[0137] Since the electrical cabinet provided in the above embodiment has the above technical effects, and the above photovoltaic power generation system includes the electrical cabinet described in the above embodiment, the above photovoltaic power generation system also has corresponding technical effects, which will not be described in detail herein.

[0138] The technical features mentioned above and the technical features shown separately in the drawings can be combined with each other arbitrarily, as long as the combined technical features are not contradictory. All feasible feature combinations are technical contents clearly recorded in this article. Any one of the multiple sub-features contained in the same sentence can be applied independently, and does not have to be applied together with other sub-features.

[0139] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An electrical cabinet, characterized in that: include: Cabinets and heat exchangers; The cabinet is provided with a first switch area and a second switch area, the first switch area and the second switch area are distributed on opposite sides of the cabinet and are distributed sequentially along a first direction, and at least one of the first switch area and the second switch area is provided with a switch; The first switch area and the second switch area are both located in the heat dissipation air duct of the cabinet and are distributed along the air flow direction in the heat dissipation air duct; the heat exchanger can perform heat exchange with the heat dissipation air duct.

2. The electrical cabinet according to claim 1, characterized in that: The airflow in the heat dissipation duct flows through the first switch area and the second switch area along the first direction.

3. The electrical cabinet according to claim 2, characterized in that: The heat exchanger comprises a first heat exchange channel and a second heat exchange channel capable of performing heat exchange, wherein the heat dissipation air channel and the second heat exchange channel are connected end to end to form an internal circulation air channel.

4. The electrical cabinet according to claim 3, characterized in that: The heat dissipation air duct comprises: a first heat dissipation air duct, a second heat dissipation air duct and a third heat dissipation air duct which are connected in sequence; Wherein, the first heat dissipation duct and the third heat dissipation duct are arranged side by side, and the second heat dissipation duct and the second heat exchange channel are arranged side by side; The inlet of the first heat dissipation duct or the third heat dissipation duct is a heat dissipation inlet of the heat dissipation duct, and the outlet of the other is a heat dissipation outlet of the heat dissipation duct; The first switch area and the second switch area are both located in the first heat dissipation duct.

5. The electrical cabinet according to claim 4, characterized in that: A first cabinet door is arranged on the side of the cabinet having the first switch area, and a second cabinet door is arranged on the side of the cabinet having the second switch area; wherein the second heat dissipation duct is arranged on the inner side of the first cabinet door or the second cabinet door.

6. The electrical cabinet according to claim 4, characterized in that: The first heat dissipation duct is lower than the third heat dissipation duct, or the first heat dissipation duct is higher than the third heat dissipation duct; And / or, the first heat dissipation duct is arranged along the horizontal direction, and the third heat dissipation duct is arranged along the horizontal direction.

7. The electrical cabinet according to claim 4, characterized in that: The heat exchanger, the heat dissipation inlet and the heat dissipation outlet are distributed on the same side of the cabinet.

8. The electrical cabinet according to claim 7, characterized in that: A first cabinet door is disposed on a side of the cabinet having the first switch area, and a second cabinet door is disposed on a side of the cabinet having the second switch area; wherein the heat exchanger is disposed on the first cabinet door or the second cabinet door.

9. The electrical cabinet according to claim 4, characterized in that: The electrical cabinet further includes a first fan, which is disposed at a connection point between the first heat dissipation duct and the second heat dissipation duct, and is used to drive airflow from the first heat dissipation duct to the second heat dissipation duct, or from the second heat dissipation duct to the first heat dissipation duct; And / or, the heat exchanger also includes a second fan, which is arranged at the connecting point between the third heat dissipation duct and the second heat exchange channel, and the second fan is used to drive the airflow from the third heat dissipation duct to the second heat exchange channel, or from the second heat exchange channel to the third heat dissipation duct.

10. The electrical cabinet according to claim 9, characterized in that: A first cabinet door is provided on one side of the cabinet having the first switch area, and a second cabinet door is provided on one side of the cabinet having the second switch area; Among them, one of the first fan and the second fan is arranged on the first cabinet door, and the other is arranged on the second cabinet door.

11. The electrical cabinet according to claim 3, characterized in that: The inlet and outlet of the first heat exchange channel are both in communication with the external environment of the cabinet; the heat exchanger further comprises a third fan, and the third fan is used to drive the air of the external environment to flow through the first heat exchange channel; And / or, the heat dissipation inlet and outlet of the heat dissipation air duct, and the heat exchanger are distributed on the same side of the cabinet; And / or, the heat dissipation inlet faces the first switch area or the second switch area.

12. The electrical cabinet according to claim 1, characterized in that: The switches in at least one of the first switch area and the second switch area are arranged in a row along a second direction, and the second direction is perpendicular to the first direction.

13. The electrical cabinet according to any one of claims 1 to 12, characterized in that: The cabinet is also provided with a circuit breaker area and a power distribution area. The circuit breaker area and the first switch area are located on the same side of the cabinet, and the power distribution area and the second switch are located on the same side of the cabinet; wherein the circuit breaker area and the power distribution area are both located in the heat dissipation duct.

14. The electrical cabinet according to claim 13, characterized in that: The first switch area, the second switch area, the power distribution area and the circuit breaker area are distributed in sequence along the airflow direction; or, the circuit breaker area, the power distribution area, the second switch area and the first switch area are distributed in sequence along the airflow direction.

15. The electrical cabinet according to any one of claims 1 to 12, characterized in that: The cabinet is also provided with a first wiring area and a second wiring area; the first wiring area and the first switch area are located on the same side of the cabinet, and the first wiring area and the first switch area are adjacent to each other; the second wiring area and the second switch area are located on the same side of the cabinet, and the second wiring area and the second switch area are adjacent to each other.

16. The electrical cabinet according to any one of claims 1 to 12, characterized in that: In a case where a first cabinet door is disposed on the side of the cabinet having the first switch area, and a second cabinet door is disposed on the side of the cabinet having the second switch area, a tray is disposed in the cabinet, and the tray is located on the inner side of at least one of the first cabinet door and the second cabinet door; Wherein, the tray is used to install the first device; when the cabinet door corresponding to the tray is open, the first device is exposed from the cabinet body so that the first device can be maintained; And / or, a second device is provided in the cabinet, the second device is located on the inner side of the tray, and the tray is movably provided in the cabinet; when the cabinet door corresponding to the tray is opened and the tray is moved to a set position, the second device is exposed from the cabinet so that the second device can be maintained.

17. The electrical cabinet according to claim 16, characterized in that: The tray is rotatably disposed in the cabinet; And / or, the second device includes at least a fourth fan, and the fourth fan is used to drive the air flow in the heat dissipation duct to flow through the heat generating device other than the tray.

18. The electrical cabinet according to claim 17, characterized in that: The heat generating device other than the switch is a circuit breaker.

19. A photovoltaic power generation system, characterized in that: Comprising the electrical cabinet according to any one of claims 1-18.

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