Explosion-proof aluminum electrolytic capacitor
By setting a hot melt mechanism and a heat-resistant sealing ring in the explosion-proof aluminum electrolytic capacitor, the problems of electrolyte ejection and fire during explosion-proof capacitors in the prior art are solved, and the effects of safe pressure relief and fire extinguishing and cooling are achieved.
Patent Information
- Application Number
- CN202421110328.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-21
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2034-05-21
AI Technical Summary
In the existing capacitor explosion-proof technology, the pressure relief valve can easily cause the electrolyte and components to be sprayed out during the pressure relief process, causing the risk of fire.
An explosion-proof aluminum electrolytic capacitor is designed. By setting a hot melt mechanism and a heat-resistant sealing ring inside the capacitor, the inner shell of the capacitor is pushed out of the shell when the gas expands, and the pressure is relieved and the compressed carbon dioxide is released to extinguish the fire and cool down.
It effectively avoids the discharge of materials inside the capacitor, reduces the risk of fire, and achieves fire extinguishing and cooling effects through carbon dioxide release.
Smart Images
Figure CN222653800U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of explosion-proof capacitors, in particular to an explosion-proof aluminum electrolytic capacitor. Background Art
[0002] Aluminum electrolytic capacitor, also known as capacitor, is a kind of energy storage element. Its structure can be divided into three types: fixed capacitor, semi-variable capacitor and variable capacitor. It is characterized by large capacity, but large leakage, large error and poor stability. It is often used for AC bypass and filtering, and is also used for signal coupling when the requirements are not high.
[0003] In the prior art, the explosion-proof principle of capacitors is mostly to discharge the air pressure inside the capacitor through a pressure relief valve to achieve an explosion-proof effect. However, in the process of the pressure relief valve relieving the pressure inside the capacitor, the electrolyte and internal components inside the capacitor will be sprayed out, which may easily cause fire on the outside of the capacitor components. Utility Model Content
[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide an explosion-proof aluminum electrolytic capacitor so as to solve the technical problems mentioned in the above background technology.
[0005] The above technical objectives of the utility model are achieved through the following technical solutions:
[0006] An explosion-proof aluminum electrolytic capacitor includes a capacitor shell, a capacitor inner shell is arranged inside the capacitor shell, a positioning ring in contact with the capacitor inner shell is arranged at the upper end of the capacitor shell, a positioning inner ring in contact with the inner wall of the capacitor shell is arranged at the lower end of the capacitor inner shell, and a hot melt mechanism is arranged at the bottom of the shell wall of the capacitor inner shell.
[0007] By adopting the above technical solution, when a thermal reaction occurs inside the capacitor causing the gas inside the capacitor to expand, the inner shell of the capacitor is pushed out of the outer shell of the capacitor to enlarge the space inside the capacitor, thereby achieving the effect of relieving the pressure of the expanded gas, thereby preventing the material inside the capacitor from being sprayed out.
[0008] In a preferred example, the utility model can be further configured as follows: a positioning plate is provided on the upper end surface of the capacitor inner shell.
[0009] By adopting the above technical solution, the position of the capacitor inner shell is limited by setting the positioning plate to avoid the bottom of the capacitor inner shell and the bottom of the capacitor outer shell from contacting each other.
[0010] In a preferred example, the utility model can be further configured as follows: the hot melt mechanism includes a ventilation groove located in the inner shell of the capacitor, and a plastic hot melt block with concave surfaces on both sides is arranged inside the ventilation groove.
[0011] By adopting the above technical solution, when thermal expansion occurs inside the capacitor, the plastic hot melt block is dissolved, so that the cavity between the capacitor outer shell and the capacitor inner shell is connected with the interior of the capacitor inner shell.
[0012] In a preferred example, the utility model can be further configured as follows: a heat-resistant sealing ring is provided at the contact position between the positioning ring and the capacitor inner shell and at the contact position between the positioning inner ring and the inner wall of the capacitor outer shell.
[0013] By adopting the above technical solution, through the arrangement of the positioning ring and the positioning inner ring, when the capacitor inner shell is inserted into the capacitor outer shell, a closed cavity is formed between the capacitor inner shell and the capacitor outer shell.
[0014] In a preferred example, the present invention can be further configured as follows: the interior of the cavity between the capacitor outer shell and the capacitor inner shell is loaded with compressed carbon dioxide gas.
[0015] By adopting the above technical solution, when a thermal reaction occurs inside the capacitor, the hot melt mechanism is dissolved, so that the compressed carbon dioxide inside the cavity is released, thereby achieving the effect of extinguishing fire and reducing temperature.
[0016] In a preferred example, the present invention can be further configured as follows: when the positioning plate contacts the top of the capacitor housing, there is a gap between the bottom of the capacitor inner housing and the inner bottom end of the capacitor housing.
[0017] By adopting the above technical solution, the inner shell of the capacitor is not in contact with the bottom of the outer shell of the capacitor, so that when a thermal reaction occurs, the inner shell of the capacitor can be pushed upward by air pressure.
[0018] In summary, the present invention includes at least one of the following beneficial technical effects:
[0019] 1. This explosion-proof aluminum electrolytic capacitor, when a thermal reaction occurs inside the capacitor causing the gas inside the capacitor to expand, the inner shell of the capacitor is pushed out of the outer shell of the capacitor to enlarge the space inside the capacitor, thereby achieving the effect of decompressing the expanded gas, thereby preventing the material inside the capacitor from being sprayed out;
[0020] 2. This explosion-proof aluminum electrolytic capacitor, when a thermal reaction occurs, the heat will melt the hot melt mechanism, so that the cavity between the capacitor inner shell and the capacitor outer shell is connected to the inside of the capacitor inner shell, and the compressed carbon dioxide in the cavity is released. The oxygen is isolated from the combustion point by the carbon dioxide to achieve the effect of extinguishing the fire, and the interior of the capacitor is cooled by the heat absorption characteristic of the compressed gas release, so that the temperature of the capacitor is reduced, thereby achieving the effect of lowering the temperature to extinguish the fire. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.
[0022] Figure 1 The utility model is a structural schematic diagram of an explosion-proof aluminum electrolytic capacitor.
[0023] Figure 2 The utility model is a schematic diagram of the internal structure of an explosion-proof aluminum electrolytic capacitor.
[0024] Figure 3 The utility model is an explosion-proof aluminum electrolytic capacitor Figure 2 A partial enlarged view of .
[0025] In the figure, 1. capacitor outer shell; 2. capacitor inner shell; 3. positioning ring; 4. positioning inner ring; 5. hot melt mechanism; 501. ventilation groove; 502. plastic hot melt block; 6. positioning plate. DETAILED DESCRIPTION
[0026] The utility model is further described in detail below in conjunction with the accompanying drawings. Example
[0027] Reference Figure 1-Figure 3 The utility model discloses an explosion-proof aluminum electrolytic capacitor, comprising a capacitor shell 1, a capacitor inner shell 2 is arranged inside the capacitor shell 1, a positioning ring 3 in contact with the capacitor inner shell 2 is arranged at the upper end of the capacitor shell 1, a positioning inner ring 4 in contact with the inner wall of the capacitor shell 1 is arranged at the lower end of the capacitor inner shell 2, and a hot melt mechanism 5 is arranged at the bottom of the shell wall of the capacitor inner shell 2.
[0028] In this embodiment, when a thermal reaction occurs inside the capacitor causing the gas inside the capacitor to expand, the capacitor inner shell 2 is pushed out of the capacitor outer shell 1 to enlarge the space inside the capacitor, thereby achieving the effect of depressurizing the expanded gas, thereby preventing the material inside the capacitor from being sprayed out, and when the thermal reaction occurs, the hot melt mechanism 5 is melted by heat, so that the cavity between the capacitor inner shell 2 and the capacitor outer shell 1 is connected to the inside of the capacitor inner shell 2, and then the compressed carbon dioxide inside the cavity achieves the effect of extinguishing the fire and cooling the temperature.
[0029] In a further preferred embodiment of the present invention, Figure 1-3As shown, a positioning plate 6 is provided on the upper end surface of the capacitor inner shell 2.
[0030] In this embodiment, the position of the capacitor inner shell 2 is limited by the arrangement of the positioning plate 6 to avoid the bottom of the capacitor inner shell 2 and the bottom of the capacitor outer shell 1 from contacting each other.
[0031] In a further preferred embodiment of the present invention, Figure 1-3 As shown, the hot melt mechanism 5 includes a venting groove 501 located in the capacitor inner shell 2, and a plastic hot melt block 502 with concave surfaces on both sides is arranged inside the venting groove 501.
[0032] In this embodiment, when thermal expansion occurs inside the capacitor, the heat generated dissolves the plastic hot melt block 502. Since both side surfaces of the plastic hot melt block 502 are concave, the heat can quickly melt the concave surface, so that the cavity between the capacitor outer shell 1 and the capacitor inner shell 2 is connected to the interior of the capacitor inner shell 2, and the fire is extinguished by releasing carbon dioxide inside the cavity.
[0033] In a further preferred embodiment of the present invention, Figure 1-3 As shown, the contact position between the positioning ring 3 and the capacitor inner shell 2 and the contact position between the positioning inner ring 4 and the inner wall of the capacitor outer shell 1 are both provided with heat-resistant sealing rings.
[0034] In this embodiment, by setting the positioning ring 3 and the positioning inner ring 4, when the capacitor inner shell 2 is inserted into the capacitor outer shell 1, a closed cavity is formed between the capacitor inner shell 2 and the capacitor outer shell 1, so as to achieve the effect of storing carbon dioxide, and through the gas pressure generated by compressing the carbon dioxide, the capacitor inner shell 2 is pushed into the interior of the capacitor outer shell 1 through the positioning inner ring 4.
[0035] In a further preferred embodiment of the present invention, Figure 1-3 As shown, the interior of the cavity between the capacitor shell 1 and the capacitor inner shell 2 is loaded with compressed carbon dioxide gas.
[0036] In this embodiment, when a thermal reaction occurs inside the capacitor, the hot melt mechanism 5 is dissolved, so that the compressed carbon dioxide inside the cavity is released, and the oxygen is isolated from the combustion point by the carbon dioxide to achieve the effect of extinguishing the fire. The compressed gas releases the heat absorbing property to cool the inside of the capacitor, thereby lowering the temperature of the capacitor and achieving the effect of lowering the temperature to extinguish the fire.
[0037] In a further preferred embodiment of the present invention, Figure 1-3As shown, when the positioning plate 6 contacts the top of the capacitor housing 1, there is a gap between the bottom of the capacitor inner housing 2 and the inner bottom end of the capacitor housing 1.
[0038] In this embodiment, the capacitor inner shell 2 is not in contact with the bottom of the capacitor outer shell 1. When a thermal reaction occurs and gas expansion occurs, the expansion of the gas acts on the bottom of the capacitor shell and the positioning inner ring 4, so that the capacitor inner shell 2 is pushed upward by gas pressure, thereby increasing the space inside the capacitor and achieving the purpose of pressure relief and explosion prevention.
[0039] The embodiments of this specific implementation method are all preferred embodiments of the utility model, and are not intended to limit the protection scope of the utility model. Therefore, all equivalent changes made based on the structure, shape, and principle of the utility model should be included in the protection scope of the utility model.
Claims
1. An explosion-proof aluminum electrolytic capacitor, characterized in that: The invention comprises a capacitor shell (1), wherein a capacitor inner shell (2) is arranged inside the capacitor shell (1), a positioning ring (3) in contact with the capacitor inner shell (2) is arranged at the upper end of the capacitor shell (1), a positioning inner ring (4) in contact with the inner wall of the capacitor shell (1) is arranged at the lower end of the capacitor inner shell (2), and a hot melt mechanism (5) is arranged at the bottom of the shell wall of the capacitor inner shell (2).
2. The explosion-proof aluminum electrolytic capacitor according to claim 1, characterized in that: A positioning plate (6) is provided on the upper end surface of the capacitor inner shell (2).
3. The explosion-proof aluminum electrolytic capacitor according to claim 2, characterized in that: The hot melt mechanism (5) comprises a venting groove (501) located in the capacitor inner shell (2), and a plastic hot melt block (502) with concave surfaces on both sides is arranged inside the venting groove (501).
4. The explosion-proof aluminum electrolytic capacitor according to claim 3, characterized in that: The contact position between the positioning ring (3) and the capacitor inner shell (2) and the contact position between the positioning inner ring (4) and the inner wall of the capacitor outer shell (1) are both provided with heat-resistant sealing rings.
5. The explosion-proof aluminum electrolytic capacitor according to claim 4, characterized in that: The interior of the cavity between the capacitor outer shell (1) and the capacitor inner shell (2) is loaded with compressed carbon dioxide gas.
6. The explosion-proof aluminum electrolytic capacitor according to claim 5, characterized in that: When the positioning plate (6) contacts the top of the capacitor housing (1), a gap exists between the bottom of the capacitor inner housing (2) and the inner bottom end of the capacitor housing (1).