Arc extinguish chamber heat dissipation method and device based on porous structure ceramic

Abstract

The invention discloses an arc extinguish chamber heat dissipation method and device based on porous structure ceramic, and the method comprises the steps: firstly designing the structure of a pouring mold, carrying out the photocuring molding through 3d printing, enabling the pouring mold to be provided with a mold core of a thin strip structure, carrying out the gel injection molding process, and carrying out the initial sintering, thereby obtaining a ceramic blank with a continuous hole structure inside; sintering again after glazing to form a porcelain shell with a pore channel, and respectively extending two ends of the pore channel to the outer wall surface of the porcelain shell; the two ends of the hole channel of the ceramic shell are connected through a medium pipe, and a medium driving module and a medium heat dissipation module are arranged on the medium pipe to form an active circulation heat dissipation loop; through-flow heat dissipation is carried out on the porcelain shell; the device comprises an arc extinguish chamber ceramic shell, a dielectric tube, a dielectric driving module and a dielectric heat dissipation module, the structure of the vacuum arc extinguish chamber ceramic shell is improved, the ceramic shell with a porous channel structure is manufactured, and a medium flows in a channel to assist the ceramic shell in heat dissipation, so that the efficiency of contact radiation heat dissipation is improved.

Description

Technical Field

[0001] This invention belongs to the field of circuit breakers, specifically relating to a method and apparatus for heat dissipation of an arc-extinguishing chamber based on porous ceramic structure. Background Technology

[0002] Existing vacuum interrupters mostly use ceramic shields, which are sintered from ceramic blanks such as alumina. The sintering process typically employs isostatic pressing to increase density and ensure airtightness. Simultaneously, to guarantee strength, the thickness of the ceramic shell cannot be too small. Therefore, the heat dissipation efficiency of the ceramic shells in existing vacuum interrupters is very low, making them good thermal insulation materials. The heat generated inside the interrupter due to current flow and arcing is difficult to dissipate quickly, affecting the recovery of the vacuum medium and thus impacting the interrupter's ability to continuously interrupt power for short periods.

[0003] Therefore, how to improve the thermal conductivity of ceramic shields while ensuring airtightness and strength is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] In view of this, the present invention provides a heat dissipation method and device for an arc-extinguishing chamber based on porous ceramic structure, which can improve the heat dissipation efficiency of the arc-extinguishing chamber, so that the arc-extinguishing chamber still has high reliability under continuous opening and closing conditions, thereby improving the service life of the arc-extinguishing chamber.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a heat dissipation method for an arc-extinguishing chamber based on porous ceramic structure, comprising the following steps: Step 1: Design the structure of the casting mold, using resin material and 3D printing with light curing. The casting mold has a core, which is a continuous thin strip structure. Step 2: Using gel casting process, the ceramic body is formed in the casting mold. After preliminary sintering, the thin strip core evaporates, resulting in a ceramic body with a continuous pore structure inside. Step 3: Glaze the inner and outer surfaces of the ceramic body from Step 2 and then sinter it again to form a ceramic shell with channels, with the two ends of the channels extending to the outer wall of the ceramic shell. Step 4: Connect the two ends of the channel in the ceramic shell using a dielectric tube, and install a dielectric drive module and a dielectric heat dissipation module on the dielectric tube to form an active circulation heat dissipation loop. Step 5: Install a temperature sensor on the outside of the arc-extinguishing chamber end cover and monitor the temperature of the arc-extinguishing chamber. When the temperature reaches a certain value, start the medium drive module in Step 4 to dissipate heat through the ceramic shell.

[0006] The beneficial technical effects of this invention are as follows: by improving the structure of the ceramic shell of the vacuum interrupter, it has continuous channels inside, which are subsequently used for heat dissipation. Gas or liquid is passed through the channels to assist the ceramic shell in heat dissipation, thereby improving the efficiency of contact radiation heat dissipation and significantly improving its heat dissipation effect. This allows the interrupter to maintain high reliability under continuous interruption conditions, thereby improving the service life of the interrupter.

[0007] Preferably, in step one, the diameter of the thin strip structure is 0.1mm to 1mm.

[0008] The resulting technical effect is that the thin strip structure is used to support the subsequent forming of the channels, and the diameter is small, thereby reducing the impact on the strength of the ceramic shell.

[0009] Preferably, in step four, the medium inside the medium tube is a gas or a liquid.

[0010] The resulting technical effect is that the medium inside the medium tube is a heat dissipation medium, and airflow is used for heat dissipation to consider insulation and cost.

[0011] Preferably, in step four, the medium driving module is a fan or a liquid pump.

[0012] The resulting technical effect is that the purpose of setting up the medium drive module is to actively dissipate heat, thereby improving the heat dissipation efficiency of the ceramic shell.

[0013] Preferably, in step four, the medium heat dissipation module is a heat sink.

[0014] The resulting technical effect is that the radiator can improve the heat exchange effect of the medium and help improve the heat dissipation efficiency of the ceramic shell. In specific applications, there are various types of radiators, and you can choose the one that suits your needs.

[0015] This invention discloses an arc-extinguishing chamber heat dissipation device for implementing the above method, comprising an arc-extinguishing chamber ceramic shell, a dielectric tube, a dielectric driving module, and a dielectric heat dissipation module. The arc-extinguishing chamber ceramic shell has a continuous microporous channel inside its shell wall, and both ends of the microporous channel extend to the outer wall surface of the arc-extinguishing chamber ceramic shell. Both ends of the dielectric tube are respectively connected to both ends of the microporous channel. The dielectric driving module and the dielectric heat dissipation module are respectively connected to the dielectric tube and cooperate with the microporous channel to establish a dielectric circulation heat dissipation path.

[0016] The beneficial effects of this invention are: based on the microporous flow channels inside the ceramic shell of the arc-extinguishing chamber, it is easy to establish a flow cooling cycle with the medium driving module and the medium heat dissipation module, thereby improving the heat dissipation efficiency without affecting the strength of the ceramic shell body, thus improving the arc extinguishing effect of the arc-extinguishing chamber during continuous interruption, and indirectly extending the service life of the component.

[0017] Preferably, the microporous channels are uniformly distributed within the shell wall of the arc-extinguishing chamber ceramic shell, and an insulating distance is maintained between the microporous channels and the top and bottom sides of the arc-extinguishing chamber ceramic shell.

[0018] The resulting technical effect is that, in order to achieve better heat dissipation, the microporous channels are evenly distributed, and an insulation distance needs to be reserved between the microporous channels and the upper and lower ends of the ceramic shell to ensure safety.

[0019] Preferably, the dielectric tube is an insulating tube, and the two ends of the ceramic shell of the arc-extinguishing chamber corresponding to the microporous flow channel are sealed and connected to the dielectric tube.

[0020] The resulting technical effect is that the insulating tube does not affect the use of the arc-extinguishing chamber, and at the same time, it makes the use of heat dissipation components safer.

[0021] Preferably, the medium driving module is a fan or a liquid pump.

[0022] Preferably, the medium heat dissipation module is a finned heat sink.

[0023] The resulting technical effect is that the media drive module and the media heat dissipation module can be selected as needed. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the heat dissipation structure of the arc-extinguishing chamber of the present invention; Figure 2 This is a side view of the arc-extinguishing chamber of the present invention.

[0025] 1. Ceramic shell for arc extinguishing chamber; 11. Microporous flow channel; 2. Dielectric pipe; 3. Dielectric drive module; 4. Dielectric heat dissipation module. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] See the appendix of this invention. Figures 1 to 2 According to an embodiment of the present invention, a heat dissipation method for an arc-extinguishing chamber based on porous ceramic structure includes the following steps: Step 1: Design the structure of the casting mold, using resin material and 3D printing with light curing. The casting mold has a core, which is a continuous thin strip structure. Step 2: The ceramic body is formed in a casting mold using a gel casting process. After preliminary sintering, the core with a fine strip structure evaporates, resulting in a ceramic body with a continuous pore structure inside. The continuous pore structure is a microporous structure. Step 3: Glaze the inner and outer surfaces of the ceramic body from Step 2 and then sinter it again to form a ceramic shell with channels, with the two ends of the channels extending to the outer wall of the ceramic shell. Step 4: Connect the two ends of the channel in the ceramic shell using a dielectric tube, and install a dielectric drive module and a dielectric heat dissipation module on the dielectric tube to form an active circulation heat dissipation loop. Step 5: Install a temperature sensor on the outside of the arc-extinguishing chamber end cover and monitor the temperature of the arc-extinguishing chamber. When the temperature reaches a certain value, start the medium drive module in Step 4 to dissipate heat through the ceramic shell.

[0028] Furthermore, in step one, the diameter of the thin strip structure is 0.1mm to 1mm. In practice, the thickness of the ceramic shell is slightly increased on this basis to offset the impact of the opening on the strength.

[0029] Furthermore, in step four, the medium inside the medium tube is either gas or liquid. Considering insulation and cost savings, airflow is usually used for heat dissipation.

[0030] Furthermore, in step four, the medium drive module is a fan or a liquid pump.

[0031] Furthermore, in step four, the medium heat dissipation module is a heat sink, which is not limited to a finned heat sink, as long as it has high heat exchange efficiency.

[0032] The present invention also discloses an arc-extinguishing chamber heat dissipation device for implementing the above method, which includes an arc-extinguishing chamber ceramic shell 1, a dielectric tube 2, a dielectric driving module 3, and a dielectric heat dissipation module 4. The arc-extinguishing chamber ceramic shell 1 has a continuous microporous channel 11 inside the shell wall to minimize the impact on the strength of the ceramic shell. The two ends of the microporous channel 11 extend to the outer wall surface of the arc-extinguishing chamber ceramic shell 1 to facilitate connection to the external dielectric tube. The two ends of the dielectric tube 2 are respectively sealed and connected to the two ends of the microporous channel 11. The dielectric driving module 3 and the dielectric heat dissipation module 4 are respectively connected to the dielectric tube 2 and cooperate with the microporous channel to establish a dielectric circulation heat dissipation path.

[0033] In other embodiments, the microporous channels 11 are uniformly distributed within the shell wall of the arc-extinguishing chamber ceramic shell 1, and an insulating distance is maintained between the microporous channels 11 and the top and bottom sides of the arc-extinguishing chamber ceramic shell 1.

[0034] In some other embodiments, the dielectric tube is an insulating tube, and the two ends of the ceramic shell 1 of the arc-extinguishing chamber corresponding to the microporous flow channel 11 are sealed and connected to the dielectric tube 2.

[0035] Specifically, the medium drive module 3 is a fan or a liquid pump.

[0036] Medium heat dissipation module 4 is a finned heat sink.

[0037] This invention designs the structure of the ceramic shell and optimizes its heat dissipation based on the internal microporous flow channels, which can significantly improve its heat dissipation effect. An external driving device drives the medium to flow within the channels, absorbing energy inside the ceramic shell and then rapidly releasing it externally, repeating this cycle for heat dissipation. There are no specific requirements for the form of the heat dissipation structure; it can be selected according to the needs.

[0038] In mass production, costs can be controlled to a low level. In addition, the microporous flow channel structure can be quickly customized according to different working environments, different arc-extinguishing chamber shapes, and different internal temperature distributions under different operating conditions, which improves design efficiency and shortens the design cycle.

[0039] The apparatus and methods disclosed in the embodiments are described in a relatively simple manner since they correspond to the methods disclosed in the embodiments. For relevant details, please refer to the description in the method section.

[0040] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily 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 invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A heat dissipation method for an arc-extinguishing chamber based on porous ceramic structure, characterized in that, Includes the following steps: Step 1: Design the structure of the casting mold, using resin material and 3D printing with light curing. The casting mold has a core, which is a continuous thin strip structure. Step 2: Using gel casting process, the ceramic body is formed in the casting mold. After preliminary sintering, the thin strip core evaporates, resulting in a ceramic body with a continuous pore structure inside. Step 3: Glaze the inner and outer surfaces of the ceramic body from Step 2 and then sinter it again to form a ceramic shell with channels, with the two ends of the channels extending to the outer wall of the ceramic shell. Step 4: Connect the two ends of the channel in the ceramic shell using a dielectric tube, and install a dielectric drive module and a dielectric heat dissipation module on the dielectric tube to form an active circulation heat dissipation loop. Step 5: Install a temperature sensor on the outside of the arc-extinguishing chamber end cover and monitor the temperature of the arc-extinguishing chamber. When the temperature reaches a certain value, start the medium drive module in Step 4 to dissipate heat through the ceramic shell.

2. The method for heat dissipation of an arc-extinguishing chamber based on porous ceramic structure according to claim 1, characterized in that, In step one, the diameter of the thin strip structure is 0.1mm to 1mm.

3. The method for heat dissipation of an arc-extinguishing chamber based on porous ceramic structure according to claim 1, characterized in that, In step four, the medium inside the medium tube is either gas or liquid.

4. The method for heat dissipation of an arc-extinguishing chamber based on porous ceramic structure according to claim 1, characterized in that, In step four, the medium driving module is a fan or a liquid pump.

5. The method for heat dissipation of an arc-extinguishing chamber based on porous ceramic structure according to claim 1, characterized in that, In step four, the medium heat dissipation module is a heat sink.

6. A heat dissipation device for an arc-extinguishing chamber implementing the method as described in any one of claims 1-5, characterized in that, The device includes an arc-extinguishing chamber ceramic shell (1), a dielectric tube (2), a dielectric driving module (3), and a dielectric heat dissipation module (4). The arc-extinguishing chamber ceramic shell (1) has a continuous microporous channel (11) inside its shell wall. The two ends of the microporous channel (11) extend to the outer wall surface of the arc-extinguishing chamber ceramic shell (1). The two ends of the dielectric tube (2) are respectively connected to the two ends of the microporous channel (11). The dielectric driving module (3) and the dielectric heat dissipation module (4) are respectively connected to the dielectric tube (2) and cooperate with the microporous channel to establish a dielectric circulation heat dissipation path.

7. The arc-extinguishing chamber heat dissipation device according to claim 6, characterized in that, The microporous channels (11) are evenly distributed inside the shell wall of the arc-extinguishing chamber ceramic shell (1), and the microporous channels (11) are provided with an insulating distance from the top and bottom sides of the arc-extinguishing chamber ceramic shell (1).

8. The arc-extinguishing chamber heat dissipation device according to claim 6, characterized in that, The dielectric tube is an insulating tube, and the two ends of the ceramic shell (1) of the arc-extinguishing chamber corresponding to the microporous flow channel (11) are sealed and connected to the dielectric tube (2).

9. The arc-extinguishing chamber heat dissipation device according to claim 6, characterized in that, The medium drive module (3) is a fan or a liquid pump.

10. The arc-extinguishing chamber heat dissipation device according to claim 6, characterized in that, The medium heat dissipation module (4) is a finned heat sink.

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