Photovoltaic charging pile film capacitor

Abstract

The utility model relates to the technical field of film capacitors, solves the technical problem that the capacitor is damaged due to overheating, and particularly relates to a film capacitor of a photovoltaic charging pile, which comprises a dust isolation box used as a supporting foundation and used for dust prevention, and a heat dissipation mechanism used for cooling the capacitor is arranged on the dust isolation box. The heat dissipation mechanism comprises a capacitor body installed in the dust isolation box through a base, a spiral heat dissipation solenoid is wound around the outer side of the capacitor body, evaporation pipes are fixedly connected to the two ends of the heat dissipation solenoid, and a backflow bin is fixedly connected to the inner side of the dust isolation box through a support. The two evaporation pipes extend into the two backflow bins correspondingly. According to the utility model, due to the arrangement of the heat dissipation mechanism, refrigerant in the heat dissipation solenoid is evaporated to absorb heat to absorb heat of the capacitor, so that the capacitor is not in an overheat state, the service life of the capacitor is prolonged, and the use safety of the capacitor can be ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of thin-film capacitors, in particular to a thin-film capacitor for a photovoltaic charging pile. Background Art

[0002] A thin-film capacitor is also called a plastic-film capacitor. It uses a plastic film as the dielectric. Due to many excellent characteristics, the thin-film capacitor is a capacitor with excellent performance. Its main characteristics are as follows: non-polar, very high insulation impedance, excellent frequency characteristics, and very small dielectric loss. Based on the above advantages, the thin-film capacitor is widely used in analog circuits. Especially in the part of signal cross-linking, a capacitor with good frequency characteristics and extremely low dielectric loss must be used to ensure that there is no significant distortion when the signal is transmitted. When the capacity of the thin-film capacitor is large, its heating power is also large. Too high a temperature is likely to cause the film core of the thin-film capacitor to age or break down, which will further increase the internal temperature of the thin-film capacitor, causing the sealed thin-film capacitor to bulge or explode, with unstable performance and short service life. Summary of the Utility Model

[0003] Aiming at the deficiencies of the prior art, the utility model provides a thin-film capacitor for a photovoltaic charging pile, which solves the technical problem that the capacitor will be damaged due to overheating and achieves the purpose of improving the service life of the capacitor.

[0004] To solve the above technical problems, the utility model provides the following technical solution: A thin-film capacitor for a photovoltaic charging pile, including a dust isolation box used as a support base and for dust prevention, and a heat dissipation mechanism for cooling the capacitor is arranged on the dust isolation box;

[0005] The heat dissipation mechanism includes a capacitor body installed inside the dust isolation box through a base. A spiral heat dissipation coil is wound around the outside of the capacitor body. Both ends of the heat dissipation coil are fixedly connected with evaporation tubes. The inner side of the dust isolation box is fixedly connected with a reflux chamber through a bracket. The two evaporation tubes respectively extend into the two reflux chambers. A spray head is installed at the top end of the evaporation tube inside the reflux chamber. One end of the outside of the evaporation tube is connected with a reflux pipe.

[0006] Preferably, a dust isolation mechanism for preventing dust from falling on the surface of the capacitor is arranged on the dust isolation box;

[0007] The dust isolation mechanism includes an isolation plate fixedly connected inside the dust isolation box and below the capacitor body. One side of the top end of the isolation plate is connected with a guiding air duct. The air outlet end of the guiding air duct is fixedly connected with an air outlet window. A fan is installed inside the air outlet window through a bracket.

[0008] Preferably, a plurality of heat dissipation plates are fixedly connected to the top end outside the reflux chamber and inside the guiding air duct.

[0009] Preferably, the liquid inlet end of the reflux pipe is connected to the bottom end of the adjacent reflux chamber, and a check valve is connected to the middle section of the reflux pipe.

[0010] Preferably, an air outlet blocking window is installed at one end of the dust separation box at the air outlet end of the air outlet window. The bottom end of the dust separation box is slidably connected with an air inlet dust separation window, and wiring pipes are connected through both ends of the outer side of the dust separation box.

[0011] Preferably, the guiding air duct is clamped outside the reflux chamber, and the connection between the guiding air duct and the reflux chamber is closely attached.

[0012] By means of the above technical solutions, the present utility model provides a thin film capacitor for a photovoltaic charging pile, which at least has the following beneficial effects:

[0013] 1. Due to the setting of the heat dissipation mechanism in the present utility model, the refrigerant inside the heat dissipation spiral tube evaporates and absorbs heat to absorb heat from the capacitor, so that the capacitor will not be in an overheated state, thereby improving the service life of the capacitor and ensuring the use safety of the capacitor.

[0014] 2. Due to the setting of the dust separation mechanism in the present utility model, the inside of the dust separation box is in a closed state, which can prevent external dust from adhering to the outer surface of the capacitor and avoid the situation that the heat of the outer surface of the capacitor increases due to the accumulation of dust. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present application, and constitute a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation to the present application.

[0016] In the drawings:

[0017] Figure 1 is of the present utility model;

[0018] Figure 2 is a schematic structural diagram of the fan installation of the present utility model;

[0019] Figure 3 is a sectional view of the guiding air duct of the present utility model;

[0020] Figure 4 is a schematic structural diagram of the installation of the atomizing nozzle of the present utility model.

[0021] In the figure: 1. Dust separation box;

[0022] 2. Heat dissipation mechanism; 201. Capacitor body; 202. Heat dissipation spiral tube; 203. Evaporation tube; 204. Reflux chamber; 205. Atomizing nozzle; 206. Reflux pipe; 207. Check valve; 208. Heat dissipation plate;

[0023] 3. Dust separation mechanism; 301. Isolation board; 302. Guide air duct; 303. Air outlet window; 304. Fan; 305. Air outlet baffle window; 306. Air inlet dust separation window; 307. Wiring pipe. Specific implementation manner

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0025] Embodiment 1

[0026] When the capacity of the film capacitor is large, its heating power is also large. Too high a temperature is likely to cause the film core of the film capacitor to age or break down, further increasing the internal temperature of the film capacitor, causing the sealed film capacitor to bulge or burst, with unstable performance and short lifespan. Please refer to Figures 1 - 4 , this embodiment provides a film capacitor for a photovoltaic charging pile, which solves the technical problem that the capacitor will be damaged due to overheating. The device includes a dust separation box 1 for supporting the foundation and dust prevention, and a heat dissipation mechanism 2 for cooling the capacitor is provided on the dust separation box 1. In order to cool the capacitor through a refrigerant. The heat dissipation mechanism 2 includes a capacitor body 201 installed inside the dust separation box 1 through a base. A spiral heat dissipation coil 202 is wound around the outside of the capacitor body 201. Both ends of the heat dissipation coil 202 are fixedly connected with evaporation tubes 203. The inner side of the dust separation box 1 is fixedly connected with a reflux chamber 204 through a bracket. The two evaporation tubes 203 respectively extend into the two reflux chambers 204. An atomizing nozzle 205 is installed at the top of the evaporation tube 203 inside the reflux chamber 204. In order to cool the refrigerant sprayed by the atomizing nozzle 205 through atomization, one end of the outside of the evaporation tube 203 is connected with a reflux pipe 206.

[0027] In order to push the liquid refrigerant inside the reflux chamber 204 back into the heat dissipation coil 202 during the spraying of the refrigerant by the atomizing nozzle 205. The liquid inlet end of the reflux pipe 206 is connected to the bottom end of the adjacent reflux chamber 204, and a one-way valve 207 is connected in the middle section of the reflux pipe 206.

[0028] When the capacitor operates normally with an electric charge, the capacitor generates heat. At this time, the refrigerant inside the heat dissipation solenoid tube 202 wound around the outside of the capacitor evaporates due to heat. The boiling point of the refrigerant is relatively low, and the evaporated refrigerant takes away the heat in the refrigerant inside the heat dissipation solenoid tube 202, concentrating inside the evaporation tube 203. At this time, the air pressure inside the evaporation tube 203 also increases as the refrigerant vapor increases. Until the air pressure reaches a certain level, the refrigerant gas will be ejected through the atomizing nozzle 205 installed at the top of the evaporation tube 203. At this time, the ejected refrigerant gas will cool down due to atomization and enter the reflux chamber 204 at the same time. The refrigerant gas entering the reflux chamber 204 will contact the inner wall of the reflux chamber 204, thus condensing into a liquid and dripping to the inner bottom of the reflux chamber 204. When the refrigerant is sprayed into the reflux chamber 204, the air pressure inside the reflux chamber 204 also increases, thereby pushing the one-way valve 207 in the middle of the reflux pipe 206 connected to it to open. At this time, the refrigerant at the inner bottom end of the reflux chamber 204 will flow back into the evaporation tube 203 through the reflux pipe 206 and then flow into the heat dissipation solenoid tube 202, thus realizing the replenishment of the refrigerant and the balance of air pressure.

[0029] Embodiment 2

[0030] On the basis of Embodiment 1, Embodiment 1 solves the technical problem that the capacitor will be damaged due to overheating, but there is still a problem that dust will accumulate inside the dust isolation box 1. Combining Figures 1 - 4 As shown, the specific implementation process is as follows: In order to dissipate heat from the heat dissipation mechanism 2 and at the same time prevent dust. A dust isolation mechanism 3 for preventing dust from falling on the surface of the capacitor is provided on the dust isolation box 1. The dust isolation mechanism 3 includes an isolation plate 301 fixedly connected inside the dust isolation box 1 and below the capacitor body 201. One side of the top end of the isolation plate 301 is connected with a guiding air duct 302. The air outlet end of the guiding air duct 302 is fixedly connected with an air outlet window 303. A blower 304 is installed inside the air outlet window 303 through a bracket.

[0031] In order to dissipate heat from the heat dissipation plate 208. A plurality of heat dissipation plates 208 are fixedly connected at the outer top end of the reflux chamber 204 and inside the guiding air duct 302.

[0032] In order to filter the air entering the guiding air duct 302. An air outlet blocking window 305 is installed at the air outlet end of the air outlet window 303 at one end of the dust isolation box 1. An air inlet dust isolation window 306 is slidably connected to the bottom end of the dust isolation box 1. Both ends of the outside of the dust isolation box 1 are connected with wiring pipes 307 in a penetrating manner.

[0033] In order to prevent the air passing through the guiding air duct 302 from entering the dust isolation box 1 and thus bringing in dust. The guiding air duct 302 is clamped outside the reflux chamber 204, and the connection between the guiding air duct 302 and the reflux chamber 204 is closely fitted.

[0034] When the capacitor is in normal use, the operator starts the fan 304. At this time, the fan 304 will exhaust air towards the air outlet end of the air outlet window 303 and draw air into the inside of the guiding air duct 302. The guiding air duct 302 will draw air through the air inlet dust isolation window 306 slidably connected to the bottom of the dust isolation box 1. During this period, the air inlet dust isolation window 306 can filter the incoming air, and the air entering the inside of the guiding air duct 302 will blow on the heat dissipation plate 208, thereby cooling the heat dissipation plate 208. The heat dissipation plate 208 will then cool the return bin 204. In this way, it can achieve cooling the capacitor while reducing the dust entering the inside of the dust isolation box 1, prevent dust from accumulating on the surface of the capacitor, and prevent the capacitor from reducing its heat dissipation capacity due to dust adhesion on the surface.

[0035] It should be noted that in this text, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0036] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A thin-film capacitor for a photovoltaic charging pile, comprising a dust isolation box (1) used as a support base and for dust prevention, characterized in that: A dust separation box (1) is provided with a heat dissipation mechanism (2) for cooling a capacitor. The heat dissipation mechanism (2) includes a capacitor body (201) installed inside the dust separation box (1) through a base. A spiral heat dissipation coil pipe (202) is wound around the outer side of the capacitor body (201). Both ends of the heat dissipation coil pipe (202) are fixedly connected with evaporation pipes (203). A reflux chamber (204) is fixedly connected to the inner side of the dust separation box (1) through a bracket. The two evaporation pipes (203) respectively extend into the two reflux chambers (204). An atomizing nozzle (205) is installed at the top end of the evaporation pipe (203) inside the reflux chamber (204). One end of the outer side of the evaporation pipe (203) is connected with a reflux pipe (206).

2. The thin-film capacitor of a photovoltaic charging pile according to claim 1, characterized in that: The dust separation box (1) is provided with a dust separation mechanism (3) for preventing dust from falling on the surface of the capacitor. The dust separation mechanism (3) includes a partition board (301) fixedly connected inside the dust separation box (1) and located below the capacitor body (201). One side of the top end of the partition board (301) is connected with a guiding air duct (302). The air outlet end of the guiding air duct (302) is fixedly connected with an air outlet window (303). A fan (304) is installed inside the air outlet window (303) through a bracket.

3. A thin film capacitor for a photovoltaic charging pile according to claim 2, characterized in that: A plurality of heat dissipation plates (208) are fixedly connected to the outer top end of the reflux chamber (204) and located inside the guiding air duct (302).

4. A thin film capacitor for a photovoltaic charging pile according to claim 1, characterized in that: The liquid inlet end of the reflux pipe (206) is connected to the bottom end of the adjacent reflux chamber (204), and a one-way valve (207) is connected in the middle section of the reflux pipe (206).

5. The thin-film capacitor of a photovoltaic charging pile according to claim 2, wherein: An air outlet blocking window (305) is installed at the air outlet end of the dust separation box (1) and located at one end. An air inlet dust separation window (306) is slidably connected to the bottom end of the dust separation box (1). Wiring pipes (307) are respectively connected through both ends of the outer side of the dust separation box (1).

6. A thin-film capacitor for a photovoltaic charging pile according to claim 2, characterized in that: The guiding air duct (302) is clamped on the outer side of the reflux chamber (204), and the connection part between the guiding air duct (302) and the reflux chamber (204) is closely attached.

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