Water-cooled film capacitor

Abstract

The utility model discloses a water-cooled film capacitor, which comprises a capacitor shell, a capacitor body, a liquid storage bin and a cooling unit, the cooling unit comprises positioning supports, an air bellow, a pump body, a water inlet pipe, an air duct and a fan, the positioning supports are mounted on two sides of the air bellow and fixed on two sides of the capacitor shell, the pump body is arranged on the right side of the air bellow, and the fan is fixed on the pump body. A dust screen cover is mounted at the top end of the air duct; an air flow discharge pipe is mounted at the bottom end of the air duct; a connecting pipe is mounted between the air flow discharge pipe and the pump body; a spray head is mounted at the bottom end of the air flow discharge pipe; a diversion channel is arranged below the diversion funnel, the capacitor body is arranged in the diversion channel, a first heat conduction plate is arranged above the capacitor body, the right side of the diversion channel is communicated with the liquid storage bin through a backflow pipe, and the upper portion of the liquid storage bin is communicated with the water inlet pipe. The structure improves the cooling effect.

Description

Technical Field

[0001] The utility model belongs to the technical field related to motor accessories, and particularly relates to a water-cooled film capacitor. Background Art

[0002] Film capacitors are also called plastic film capacitors. Film capacitors use metal foil as electrodes, overlap it with plastic films such as polyethylene, polypropylene, polystyrene or polycarbonate, and then wind it into a cylindrical structure. Depending on the type of plastic film, they are called polyethylene capacitors, polypropylene capacitors, polystyrene capacitors and polycarbonate capacitors. Film capacitors are excellent in performance because they have many excellent properties. Film capacitors have high insulation impedance, excellent frequency characteristics, and very little dielectric loss.

[0003] Based on the advantages of film capacitors, they are widely used in analog circuits, especially in the signal interconnection part. Capacitors with good frequency characteristics and extremely low dielectric loss must be used to ensure that the signal is not too distorted during transmission. Film capacitors will generate heat during use, and their performance will decrease with the increase of temperature, so they need to be dissipated. However, existing film capacitors, such as the water-cooled film capacitor disclosed in patent No. 202022209127.8, dissipate heat through water cooling, but the structure has the following problems: 1. The use of water cooling alone results in poor cooling effect; 2. At the same time, the water cooling cannot be recycled, which leads to the reduction of cooling effect after long-term use, so it needs to be improved. Utility Model Content

[0004] The utility model aims to provide a water-cooled film capacitor, which solves the problem that the existing film capacitor has poor cooling effect due to simple water cooling, and the water cooling cannot be circulated, and the cooling effect is easily reduced after long-term use.

[0005] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0006] The utility model is a water-cooled film capacitor, comprising a capacitor housing, a capacitor body is arranged in the capacitor housing, a liquid storage tank is arranged on the right side of the capacitor housing, a cooling unit is arranged on the capacitor housing, the cooling unit comprises a positioning bracket, a bellows, a pump body, a water inlet pipe, an air duct, and a fan, a positioning bracket is installed on both sides of the bellows, the positioning bracket is fixed on both sides of the capacitor housing, a pump body is arranged on the right side of the bellows, and the water inlet pipe is arranged at the bottom end of the pump body, and a fan is arranged inside the bellows. A duct is provided, and a fan is installed inside the duct, a dustproof mesh cover is installed at the top of the duct, an airflow exhaust pipe is installed at the bottom of the duct, and a connecting pipe is installed between the airflow exhaust pipe and the pump body, more than one nozzle is installed at the bottom of the airflow exhaust pipe, a guide funnel is arranged at the bottom of the airflow exhaust pipe, a guide channel is arranged below the guide funnel, the capacitor body is arranged in the guide channel, a heat conduction plate 1 is arranged above the capacitor body, the right side of the guide channel is connected with the liquid storage tank through a reflux pipe, and the top of the liquid storage tank is connected with the water inlet pipe.

[0007] Preferably, in order to improve the heat conduction effect, a second heat conduction plate is also provided at the bottom of the capacitor body, and two fixing rods are spaced apart below the second heat conduction plate, and the fixing rods are fixed in the capacitor housing.

[0008] Preferably, to facilitate cleaning of the filter, one side of the dustproof screen is hinged to a hinged seat via a rotating shaft, the hinged seat is fixed above the capacitor housing, and a filter is provided above the fan in the bellows.

[0009] Preferably, to facilitate fixation, a magnetic sheet is provided at the bottom of the other side of the dustproof mesh cover, and an iron sheet cooperating with the magnetic sheet is provided above the capacitor housing.

[0010] Preferably, in order to facilitate the replacement of the filter, limit plates are provided on both sides of the bellows, and the filter is mounted on the two limit plates.

[0011] Preferably, to improve the rapid replacement of the filter, an adjustment spring is arranged above the limit plate, the upper side of the adjustment spring is against the bottom of the filter, and two push rods are arranged at the bottom of the dustproof net cover to push the filter toward the limit plate.

[0012] The utility model has the following beneficial effects: the structure adopts water cooling and air cooling to operate simultaneously, thereby further improving the cooling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of a water-cooled film capacitor in Example 1;

[0014] Figure 2 This is a schematic structural diagram of a water-cooled film capacitor in Example 2;

[0015] Figure 3 This is a schematic diagram of the structure when the upper box cover and the dust cover are not installed in Example 3;

[0016] Figure 4 for Figure 3 A magnified image of point A;

[0017] Figure 5 This is a schematic structural diagram of a water-cooled film capacitor in Example 4;

[0018] Figure 6 Figure 5 The enlarged view of point B;

[0019] Figure 7 This is a schematic diagram of the structure of a water-cooled film capacitor in Example 5.

[0020] Figure numerals: capacitor housing 1, capacitor body 2, liquid storage tank 3, positioning bracket 4, bellows 5, pump body 6, water inlet pipe 7, air duct 8, fan 9, dustproof mesh cover 10, airflow exhaust pipe 11, connecting pipe 12, nozzle 13, guide funnel 14, guide channel 15, heat conduction plate 1 16, heat conduction plate 2 17, fixing rod 18, rotating shaft 19, hinged seat 20, filter screen 21, magnetic suction sheet 22, iron sheet 23, limit plate 24, adjustment spring 25, push rod 26, return pipe 27. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in combination with the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Example 1

[0023] See also Figure 1As shown, a water-cooled film capacitor disclosed in this embodiment includes a capacitor housing 1, a capacitor body 2 is arranged in the capacitor housing 1, a liquid storage tank 3 is arranged on the right side of the capacitor housing 1, a cooling unit is arranged on the capacitor housing 1, and the cooling unit includes a positioning bracket 4, a bellows 5, a pump body 6, a water inlet pipe 7, an air duct 8, and a fan 9. A positioning bracket 4 is installed on both sides of the bellows 5, and the positioning bracket 4 is fixed on both sides of the capacitor housing 1. The pump body 6 is arranged on the right side of the bellows 5, and the water inlet pipe 7 is arranged at the bottom end of the pump body 6. The inside of the bellows 5 is provided with an air duct 8, and the air duct 8 A fan 9 is installed inside the air duct 8, a dustproof screen 10 is installed at the top of the air duct 8, a wind flow pipe 11 is installed at the bottom of the air duct 8, and a connecting pipe 12 is installed between the wind flow pipe 11 and the pump body 6, and more than one nozzle 13 is installed at the bottom of the wind flow pipe 11, a guide funnel 14 is arranged at the bottom of the wind flow pipe 11, and a guide channel 15 is arranged below the guide funnel 14, the capacitor body 2 is arranged in the guide channel 15, and a heat conducting plate 16 is arranged above the capacitor body 2. The right side of the guide channel 15 is connected to the liquid storage tank 3 through a return pipe 27, and the top of the liquid storage tank 3 is connected to the water inlet pipe 7. In order to facilitate the liquid inlet to the liquid storage tank 3, a liquid inlet can be arranged above the liquid storage tank 3, and an air outlet is also arranged below the wind flow pipe 11.

[0024] The specific working principle of this structure is as follows: this structure sucks the coolant in the liquid storage tank 3 through the pump body 6, and then flows into the guide channel 15 through the wind flow exhaust pipe 11 and multiple nozzles 13 in conjunction with the guide funnel 14, so as to achieve heat dissipation of the internal capacitor body 2. At the same time, when the fan 9 is working, wind is sucked in from the outside and blown through the air outlet to the guide funnel 14 and enters the guide channel 15. After the heat inside the capacitor body 2 is conducted by the heat conduction plate 16, the wind is used in conjunction with the coolant for cooling to further improve the heat dissipation effect. Therefore, this structure adopts water cooling and air cooling at the same time to further improve the cooling effect.

[0025] Example 2

[0026] See also Figure 2 As shown, a water-cooled film capacitor disclosed in this embodiment is preferably provided with a heat conducting plate 17 at the bottom of the capacitor body 2 to improve the thermal conductivity, and two fixing rods 18 are arranged at intervals below the heat conducting plate 17. The fixing rods 18 are fixed in the capacitor housing 1. The thermal conductivity is improved by the above-mentioned structural arrangement.

[0027] Example 3

[0028] See also Figure 3-Figure 4As shown, a water-cooled film capacitor disclosed in this embodiment is preferably convenient for cleaning the filter. One side of the dustproof mesh cover 10 is hinged on a hinged seat 20 through a rotating shaft 19, and the hinged seat 20 is fixed above the capacitor housing 1. A filter 21 located above the fan 9 is arranged in the bellows 5. Through the above-mentioned structural arrangement, the filter 21 can be used to filter the incoming wind, and since one side of the dustproof mesh cover 10 is hinged above the capacitor housing 1, it is convenient to remove the filter 21 later to clean the filter.

[0029] Example 4

[0030] See also Figure 5 -As shown in FIG6 , a water-cooled film capacitor disclosed in this embodiment is preferably provided with a magnetic sheet 22 at the bottom of the other side of the dustproof mesh cover 10 for easy fixation, and an iron sheet 23 cooperating with the magnetic sheet 22 is provided above the capacitor housing 1. The dustproof mesh cover 10 can be fixed by the above structure to avoid it from opening automatically when not opened, thereby improving its fixing effect.

[0031] Example 5

[0032] See also Figure 7 As shown, a water-cooled film capacitor disclosed in this embodiment is preferably convenient for replacing the filter, and limit plates 24 are arranged on both sides of the bellows 5, and the filter 21 is mounted on the two limit plates 24. Preferably, in order to improve the rapid replacement of the filter, an adjusting spring 25 is arranged above the limit plate 24, and the upper side of the adjusting spring 25 is against the bottom of the filter 21, and two push rods 26 are arranged at the bottom of the dustproof net cover 10 for pushing the filter 21 against the limit plates 24 when the dustproof net cover 10 is closed. Through the above-mentioned structural arrangement, when the dustproof net cover 10 is opened, the push rod 26 will not push the filter 21 against the limit plate 24. At this time, under the action of the adjusting spring 25, the filter 21 is pushed open, which is convenient for quickly replacing the filter 21.

[0033] The above are only preferred embodiments of the present invention and do not limit the present invention. Any modification to the technical solutions recorded in the aforementioned embodiments and any equivalent replacement of some of the technical features therein, any modification, equivalent replacement, and improvement made are all within the protection scope of the present invention.

Claims

1. A water-cooled film capacitor, comprising a capacitor housing (1), a capacitor body (2) being arranged inside the capacitor housing (1), characterized in that: A liquid storage tank (3) is arranged on the right side of the capacitor housing (1). A cooling unit is arranged on the capacitor housing (1). The cooling unit comprises a positioning bracket (4), a bellows (5), a pump body (6), a water inlet pipe (7), an air duct (8), and a fan (9). A positioning bracket (4) is installed on both sides of the bellows (5). The positioning bracket (4) is fixed on both sides of the capacitor housing (1). The pump body (6) is arranged on the right side of the bellows (5), and the water inlet pipe (7) is arranged at the bottom end of the pump body (6). An air duct (8) is arranged inside the bellows (5), and a fan (9) is installed inside the air duct (8). A dustproof cover is installed at the top of the air duct (8). A mesh cover (10), an airflow discharge pipe (11) is installed at the bottom end of the air duct (8), and a connecting pipe (12) is installed between the airflow discharge pipe (11) and the pump body (6), one or more nozzles (13) are installed at the bottom end of the airflow discharge pipe (11), a guide funnel (14) is arranged at the bottom of the airflow discharge pipe (11), a guide channel (15) is arranged below the guide funnel (14), the capacitor body (2) is arranged in the guide channel (15), a heat conduction plate (16) is arranged above the capacitor body (2), the right side of the guide channel (15) is connected to the liquid storage tank (3) through a return pipe (27), and the top of the liquid storage tank (3) is connected to the water inlet pipe (7).

2. A water-cooled film capacitor according to claim 1, characterized in that: A second heat conducting plate (17) is also provided at the bottom of the capacitor body (2), and two fixing rods (18) are spaced apart below the second heat conducting plate (17), the fixing rods (18) being fixed in the capacitor housing (1).

3. The water-cooled film capacitor according to claim 1, characterized in that: One side of the dustproof screen (10) is hinged to an articulated seat (20) via a rotating shaft (19); the articulated seat (20) is fixed above the capacitor housing (1); and a filter screen (21) located above the fan (9) is arranged in the wind box (5).

4. The water-cooled film capacitor according to claim 3, characterized in that: A magnetic attraction sheet (22) is provided at the bottom of the other side of the dustproof mesh cover (10), and an iron sheet (23) matching the magnetic attraction sheet (22) is provided above the capacitor housing (1).

5. The water-cooled film capacitor according to claim 3, characterized in that: Limiting plates (24) are arranged on both sides of the wind box (5), and the filter screen (21) is mounted on the two limiting plates (24).

6. The water-cooled film capacitor according to claim 5, characterized in that: An adjustment spring (25) is arranged above the limit plate (24), the upper portion of the adjustment spring (25) abuts against the bottom of the filter screen (21), and two push rods (26) are arranged at the bottom of the dustproof screen cover (10) for pushing the filter screen (21) toward the limit plate (24).

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