Cable connection cabinet for photovoltaic power generation

Abstract

The utility model relates to a cable connection cabinet for photovoltaic power generation. The cable connection cabinet comprises a cabinet body, a cooling box, a pipeline and a sucking pump, the cabinet body is provided with a cabinet top and a cabinet bottom which are oppositely arranged, an installation cavity is formed between the cabinet top and the cabinet bottom, the cooling box and the air extracting pump are arranged at the cabinet bottom, the air extracting end of the air extracting pump is arranged in the installation cavity, and the air exhausting end of the air extracting pump penetrates through the cabinet body and is used for being communicated with the outside; the cooling box is internally provided with a heat exchange cavity used for containing cooling liquid, the pipeline is provided with an air inlet end and an air outlet end which are oppositely arranged, at least part of the pipeline is arranged in the heat exchange cavity in a penetrating mode, the air inlet end is arranged outside the cabinet body, and the air outlet end extends to the cabinet top. According to the cable connection cabinet for the photovoltaic power generation, the cooling function of cooled air is better achieved through driving of the sucking pump, internal heat of the cable connection cabinet for the photovoltaic power generation is effectively reduced, water vapor is not likely to be brought in, and the electrochemical corrosion or short circuit defect is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic grid connection, in particular to a cable connection cabinet for photovoltaic power generation. Background Art

[0002] Solar energy is a renewable energy source and one of the important means to solve energy problems in the future. Photovoltaic power generation is a technology that uses the photovoltaic effect of semiconductor interfaces to directly convert light energy into electrical energy. It mainly consists of three parts: solar panels, controllers and inverters. The inverter is generally integrated in the photovoltaic cable connection cabinet.

[0003] Due to long working hours or climatic reasons, the inside of the photovoltaic cable connection cabinet is sometimes in a high temperature state. In order to reduce the impact of high temperature, CN220368369U uses a refrigeration plate to dissipate heat from internal components, but it uses air-water cooling to blow inside the cabinet. Although a waterproof and breathable membrane is used, it cannot absolutely isolate water vapor. The daily penetration of water vapor can easily cause electrochemical corrosion or short circuit defects inside. Utility Model Content

[0004] Based on this, it is necessary to provide a cable connection cabinet for photovoltaic power generation.

[0005] A cable connection cabinet for photovoltaic power generation, comprising a cabinet body, a cooling box, a pipeline, and an air pump; the cabinet body has a cabinet top and a cabinet bottom that are arranged opposite to each other, an installation cavity is provided between the cabinet top and the cabinet bottom, the cooling box and the air pump are arranged at the cabinet bottom, and the air extraction end of the air extraction pump is arranged in the installation cavity, the exhaust end of the air extraction pump passes through the cabinet body and is used to communicate with the outside, the cooling box has a heat exchange cavity for accommodating a coolant, the pipeline has an air inlet end and an air outlet end that are arranged opposite to each other, at least a part of the pipeline passes through the heat exchange cavity, the air inlet end is arranged outside the cabinet, and the air outlet end extends to the cabinet top.

[0006] The above-mentioned photovoltaic power generation cable connection cabinet has a cooling box arranged at the bottom of the cabinet body, which has good stability and is easy to maintain. When the temperature in the installation cavity is too high, the vacuum pump is turned on, and the vacuum end of the vacuum pump draws air to reduce the air pressure in the installation cavity. In this way, the air will enter the pipeline from the air inlet end under the action of the atmosphere. When the air passes through the heat exchange cavity, the coolant cools the air, and the cooled air flows out from the air outlet end of the pipeline. Under the combined action of the vacuum pump drawing air and the general top-down movement of the cold air, the cooled air moves from the top of the cabinet to the bottom of the cabinet, and fully contacts the components in the cabinet from top to bottom, achieving a better heat dissipation effect. In addition, the air does not contact the coolant, thereby avoiding the introduction of water vapor, and the cooled air flowing in the pipeline will cool the pipeline, and then cool the ambient temperature in the installation cavity through the pipeline, thereby achieving a better heat dissipation effect.

[0007] In one embodiment, the cabinet top is integrally formed with a groove which is sunken from the outside to the inside, a cover plate is provided at the notch of the groove, a plurality of through holes are opened at the bottom of the groove, the through holes are connected to the inside of the cabinet, and the air outlet is penetrated in the groove. In one embodiment, silicon dioxide particles are provided in the groove.

[0008] In one of the embodiments, the air outlet end is provided with a nozzle, and the nozzle is provided with a plurality of ventilation holes.

[0009] In one of the embodiments, the cooling box is provided with a liquid inlet valve and a liquid discharge valve, and the liquid inlet valve and the liquid discharge valve are penetrated to the outside of the cabinet.

[0010] In one of the embodiments, a filter is provided at the air inlet end of the pipeline.

[0011] In one of the embodiments, the air inlet end is detachably provided with a cover body, and the filter screen is provided on the cover body.

[0012] In one of the embodiments, the portion of the pipeline passing through the heat exchange cavity is bent.

[0013] In one of the embodiments, at least a portion of the pipeline passing through the heat exchange chamber is arranged in a circuitous and / or spiral shape.

[0014] In one embodiment, a vertical frame and a mounting plate are provided in the cabinet, one end of the vertical frame is connected to the cabinet top, and the other end is connected to the cabinet bottom, and the mounting plate is connected to the vertical frame.

[0015] In one of the embodiments, the mounting plate is provided with a control assembly, a metering assembly, a frame circuit breaker assembly and a molded case circuit breaker assembly in sequence from the top of the cabinet to the bottom of the cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic cross-sectional structural diagram of a cable connection cabinet for photovoltaic power generation according to one embodiment;

[0017] Figure 2 for Figure 1 A schematic diagram of the local enlarged structure at point A in the embodiment. DETAILED DESCRIPTION

[0018] For ease of understanding of the application, the application will be described more fully below. The application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the application more thorough and comprehensive.

[0019] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In the description of the present application, the meaning of "several" is at least one, such as one, two, etc., unless otherwise clearly and specifically defined.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which the present application belongs. The terms used herein in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0021] In the present application, the technical features described in an open manner include closed technical solutions composed of the listed features, and also include open technical solutions containing the listed features.

[0022] like Figure 1 As shown, in one embodiment, a cable connection cabinet 10 for photovoltaic power generation, or a photovoltaic grid-connected cabinet, is provided.

[0023] The cable connection cabinet 10 for photovoltaic power generation includes a cabinet body 100, a cooling box 200, a pipeline 300, and an air pump 400; the cabinet body 100 has a cabinet top 110 and a cabinet bottom 120 that are relatively arranged, and an installation cavity 111 is provided between the cabinet top 110 and the cabinet bottom 120, the cooling box 200 and the air pump 400 are arranged on the cabinet bottom 120, and are located in the installation cavity 111, and the air extraction end 410 of the air extraction pump 400 is arranged in the installation cavity 111, and the exhaust end 420 of the air extraction pump 400 passes through the cabinet body 100 and is used to communicate with the outside, and the exhaust end 420 is connected to the outside.

[0024] The cooling box 200 has a heat exchange cavity 210 for accommodating a coolant, the pipe 300 has an air inlet end 310 and an air outlet end 320 arranged opposite to each other, at least a portion of the pipe 300 is arranged in the heat exchange cavity 210, the air inlet end 310 is arranged outside the cabinet 100, and the air outlet end 320 extends to the cabinet top 110. For example, the coolant is water, and for another example, the coolant is a mixture of water and ethylene glycol.

[0025] More specifically, a vertical frame 160, a horizontal frame 180 and a mounting plate 170 are provided in the cabinet body 100. One end of the vertical frame 160 is connected to the cabinet top 110, and the other end is connected to the cabinet bottom 120. The horizontal frame 180 and the mounting plate 170 are connected to the vertical frame 160, and the horizontal frame 180 is provided with air holes 181. In this embodiment, there are multiple horizontal frames 180 and mounting plates 170, and the multiple horizontal frames 180 and the multiple mounting plates 170 divide the mounting cavity 111 into multiple chambers, and different chambers are used to install different photovoltaic grid-connected accessories.

[0026] In one embodiment, the mounting plate 170 is provided with a control assembly 810, a metering assembly 820, a frame circuit breaker assembly 830, and a molded case circuit breaker assembly 840 in sequence from the cabinet top 110 to the cabinet bottom 120. These photovoltaic accessories are used to achieve photovoltaic grid connection. Among them, each horizontal frame 180 is used to place the control assembly 810 and the frame circuit breaker assembly 830 respectively, so that the control assembly 810 and the frame circuit breaker are more stable.

[0027] In one embodiment, the portion of the pipe 300 passing through the heat exchange cavity 210 is arranged in a bent shape, so that the contact area between the pipe 300 and the coolant in the heat exchange cavity 210 can be increased, thereby better cooling the air. In this embodiment, the portion of the pipe 300 passing through the heat exchange cavity 210 is arranged in a circuitous shape, thereby increasing the contact area between the pipe 300 and the coolant in the heat exchange cavity 210. In other embodiments, the portion of the pipe passing through the heat exchange cavity is arranged in a spiral shape.

[0028] In one embodiment, the cabinet top 110 is recessed from the outside to the inside and is integrally formed with a groove 103, a cover plate 140 is provided at the notch of the groove 103, a plurality of through holes 105 are provided at the bottom of the groove 103, the through holes 105 are connected to the interior of the cabinet 100, the air outlet 320 is penetrated in the groove 103, and the groove 103 can store silica particles, absorb water vapor in the air, and reduce air humidity. In this embodiment, the groove 103 can first collect the cooled air and diffuse it evenly through each through hole 105, so that the cooled gas enters the installation cavity 111 evenly, which helps to avoid uneven heat dissipation. At present, most cabinets 100 are made of stainless steel, and the groove 103 is directly integrally formed, which has high production efficiency, is not easy to damage, and is easy to maintain. In other embodiments, the air outlet is provided with a nozzle, and a plurality of vents are provided on the nozzle, so that the cooled air can be evenly ejected.

[0029] In order to avoid electrochemical corrosion and short circuit problems of photovoltaic components caused by humid air, in one embodiment, silica particles for absorbing water vapor are provided in the groove. Such silica particles used as dehumidifiers are orange when dry and dark green after absorbing moisture. Specifically, there are multiple silica particles, and the silica particles can physically absorb moisture cyclically. After the silica particles are set in the groove, they are taken out and dried after moisture absorption. After drying, the silica is restored and can be put back into the groove, which is environmentally friendly and durable. In this way, water vapor in the air can be better removed to avoid electrochemical corrosion and short circuit problems of photovoltaic components.

[0030] In one embodiment, the cooling box 200 is provided with an inlet valve 510 and a drain valve 520, and the inlet valve 510 and the drain valve 520 are penetrated to the outside of the cabinet 100, the inlet valve is used to connect the inlet pipe, and the drain valve is used to connect the drain pipe, so that the coolant in the cooling box 200 can be replaced more easily.

[0031] like Figure 2 As shown, in one embodiment, the air inlet end 310 of the pipe 300 is provided with a filter 610 to prevent the inhalation of impurities, insects and other objects. In one embodiment, the air inlet end 310 is detachably provided with a cover 600, and the filter 610 is provided on the cover 600, so that the filter 610 can be more conveniently removed and washed to avoid clogging of the filter 610. In one embodiment, the cover 600 is threadedly connected to the air inlet end 310 to achieve a detachable connection, and the cover 600 is relatively stable when connected to the air inlet end 310.

[0032] In the above-mentioned photovoltaic power generation cable connection cabinet 10, when the temperature in the installation cavity 111 is too high, the vacuum pump 400 is turned on, and the vacuum end 410 of the vacuum pump 400 is used to extract air, so that the air pressure in the installation cavity 111 decreases. In this way, air will enter the pipeline 300 from the air inlet end 310 under the action of the atmosphere, wherein the filter 610 can prevent impurities and insects from entering the pipeline 300. The inlet valve 510 of the cooling box 200 introduces coolant, and the drain valve 520 discharges the coolant. When the air passes through the heat exchange cavity 210 from the pipeline 300, the coolant continuously introduced and discharged in the heat exchange cavity 210 cools the air and absorbs the heat of the air. The cooled air flows out from the outlet end 320 of the pipeline 300 and enters the groove 103, and is evenly diffused into the installation cavity 111 through each air hole 181. Under the combined effect of the vacuum pump 400 pumping air and the general top-down movement of cold air, the cooled air moves from the cabinet top 110 to the cabinet bottom 120 and fully contacts each photovoltaic component from top to bottom, achieving a better heat dissipation effect on photovoltaic components such as the control component 810, the metering component 820, the frame-type circuit breaker component, and the molded case circuit breaker component 840.

[0033] The above-mentioned heat dissipation method utilizes the properties of the cooling gas, and through the drive of the vacuum pump 400, the cooling air can better contact the photovoltaic components, better realize the heat dissipation function, effectively reduce the internal heat of the photovoltaic power generation cable connection cabinet 10, and is not easy to bring in water vapor, thereby avoiding electrochemical corrosion or short circuit defects.

[0034] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0035] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A cable connection cabinet for photovoltaic power generation, characterized in that: It includes a cabinet body, a cooling box, a pipeline, and an air pump; the cabinet body has a cabinet top and a cabinet bottom that are relatively arranged, and an installation cavity is provided between the cabinet top and the cabinet bottom; the cooling box and the air pump are arranged on the cabinet bottom, and the air extraction end of the air extraction pump is arranged in the installation cavity, and the exhaust end of the air extraction pump passes through the cabinet body and is used to communicate with the outside; the cooling box has a heat exchange cavity for accommodating a coolant, the pipeline has an air inlet end and an air outlet end that are relatively arranged, at least a part of the pipeline passes through the heat exchange cavity, the air inlet end is arranged outside the cabinet, and the air outlet end extends to the cabinet top.

2. The photovoltaic power generation cable connection cabinet according to claim 1, characterized in that: The cabinet top is integrally formed with a groove which is recessed from the outside to the inside, a cover plate is provided at the notch of the groove, a plurality of through holes are opened at the bottom of the groove, the through holes are connected with the inside of the cabinet body, and the air outlet is penetrated in the groove.

3. The photovoltaic power generation cable connection cabinet according to claim 2, characterized in that: Silicon dioxide particles are arranged in the groove.

4. The photovoltaic power generation cable connection cabinet according to claim 1, characterized in that: The cooling box is provided with a liquid inlet valve and a liquid discharge valve, and the liquid inlet valve and the liquid discharge valve are penetrated to the outside of the cabinet.

5. The photovoltaic power generation cable connection cabinet according to claim 1, characterized in that: A filter screen is provided at the air inlet end of the pipeline.

6. The photovoltaic power generation cable connection cabinet according to claim 5, characterized in that: The air inlet end is detachably provided with a cover body, and the filter screen is arranged on the cover body.

7. The photovoltaic power generation cable connection cabinet according to claim 1, characterized in that: The portion of the pipeline passing through the heat exchange cavity is arranged in a bent shape.

8. The photovoltaic power generation cable connection cabinet according to claim 7, characterized in that: At least part of the pipeline passing through the heat exchange cavity is arranged in a circuitous shape and / or a spiral shape.

9. The photovoltaic power generation cable connection cabinet according to any one of claims 1 to 8, characterized in that: A vertical frame and a mounting plate are arranged in the cabinet body, one end of the vertical frame is connected to the cabinet top, and the other end is connected to the cabinet bottom, and the mounting plate is connected to the vertical frame.

10. The photovoltaic power generation cable connection cabinet according to claim 9, characterized in that: The mounting plate is provided with a control assembly, a metering assembly, a frame circuit breaker assembly and a molded case circuit breaker assembly in sequence from the top of the cabinet to the bottom of the cabinet.

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