Liquid cooling assembly for high-voltage direct-current relay

Abstract

The invention relates to a liquid cooling assembly for a high-voltage direct-current relay. A liquid cooling assembly for a high-voltage direct-current relay comprises an outer ring part and an inner ring part, the inner ring part forms a containing cavity used for containing a relay body, a liquid cooling channel is formed between the inner ring part and the outer ring part, an upper ring part used for sealing an upper opening is arranged between the upper edge of the inner ring part and the outer ring part, and a lower ring part used for sealing a lower opening is arranged between the upper edge of the inner ring part and the outer ring part. A lower ring part used for sealing the lower opening is arranged between the lower edge of the inner ring part and the outer ring part, a spiral protrusion used for dividing the liquid cooling channel into spiral channels is further arranged between the inner ring part and the outer ring part, and a liquid inlet connector and a liquid outlet connector are arranged on the outer ring part. The heat exchanger has the advantages of being high in heat exchange efficiency, better in liquid cooling heat dissipation effect and good in temperature uniformity.

Description

Technical Field

[0001] The invention relates to a liquid cooling component for a high-voltage direct current relay. Background Art

[0002] Chinese patent application number 202222223231.1 discloses a relay, including a relay body, which is located in a liquid-cooled shell. The liquid-cooled shell includes an inner shell and an outer shell. A coolant heat exchange channel is formed between the inner shell and the outer shell. A liquid inlet and a liquid outlet are provided on the outer shell. The liquid inlet and the liquid outlet are located on the same side of the relay body. A partition is provided between the inner shell and the outer shell to prevent the coolant at the liquid inlet from directly entering the liquid outlet.

[0003] The above solution has the following defects: the coolant movement path between the outer shell and the inner shell is short, and the heat exchange is not sufficient. At the same time, since the inlet and outlet are at the same height and the cavity is short, the temperature difference between the inlet and outlet areas is small, and dead corners are easily formed in areas far away from the inlet and outlet, with a large temperature gradient and poor heat dissipation effect. Summary of the Invention

[0004] The object of the present invention is to provide a liquid cooling assembly for a high-voltage DC relay with better liquid cooling and heat dissipation effect.

[0005] To achieve the above-mentioned objectives, the present invention adopts a liquid cooling assembly for a high-voltage DC relay, comprising an outer ring portion and an inner ring portion, the inner ring portion forming an accommodating cavity for accommodating a relay body, characterized in that: a liquid cooling channel is formed between the inner ring portion and the outer ring portion, an upper ring portion for closing the upper opening is provided between the upper edge of the inner ring portion and the outer ring portion, a lower ring portion for closing the lower opening is provided between the lower edge of the inner ring portion and the outer ring portion, a spiral protrusion for dividing the liquid cooling channel into a spiral channel is further provided between the inner ring portion and the outer ring portion, one side of the circumferential sides of the upper ring portion, the spiral protrusion and the lower ring portion is fixed to one of the two components of the inner ring portion and the outer ring portion, the other side of the circumferential sides of the spiral protrusion is adjacent to or in contact with the other of the two components, the other side of the circumferential sides of the upper ring portion and the lower ring portion is connected to and sealed with the other of the two components, and a liquid inlet joint and a liquid outlet joint are provided on the outer ring portion.

[0006] The present invention divides the liquid cooling channel into spiral channels through spiral protrusions. The coolant flows along the spiral path, the path is significantly extended, the contact time between the coolant and the relay body is longer, and the heat exchange is more sufficient; the spiral channel allows the coolant to flow evenly through the entire outer surface of the relay body, avoiding local retention, making the temperature gradient more uniform, eliminating heat dissipation dead corners, and improving the overall heat dissipation consistency to enhance the heat dissipation and cooling effect.

[0007] Among them, the upper ring part, the spiral protrusion and the lower ring part can be integrally formed on the inner ring part or the outer ring part. After the inner ring part and the outer ring part are assembled, sealing and connection can be achieved by welding, dispensing (epoxy resin), liquid injection, etc.

[0008] Preferably, the upper ring portion is fixed to the inner ring portion, and the upper edge of the outer ring portion is higher than the upper edge of the inner ring portion, so that a glue-filled space is formed on the inner side of the upper end of the outer ring portion. By forming the glue-filled space, a seal is achieved between the upper and outer ring portions by filling with glue (epoxy resin), thereby eliminating the need for welding between the upper and outer ring portions and facilitating assembly and production.

[0009] Preferably, the lower end of the inner ring portion is provided with a first bottom portion that closes the lower end opening. The first bottom portion can support the relay body, facilitating the assembly of the present invention and the relay body.

[0010] Preferably, the lower end of the outer ring portion is provided with a second bottom portion that closes the lower end opening, and the outer edge of the second inner portion constitutes the lower ring portion, with the first and second bottom portions being sealed. The inner ring portion with the first bottom portion can be supported within the outer ring portion with the second bottom portion, with the lower end sealed by the second bottom portion, further shortening the assembly process and eliminating the need for welding or gluing between the inner and lower ring portions.

[0011] Preferably, the portions of the liquid inlet and outlet connectors located outside the outer ring portion include a flexible connection portion and a connector portion for connecting to a pipeline, with the connector portion being further away from the outer ring portion than the flexible connection portion. This arrangement facilitates bending of the portions of the liquid inlet and outlet connectors located outside the outer ring portion, thereby facilitating connection to the pipelines of the liquid cooling system.

[0012] The present invention has the advantages of high heat exchange efficiency, better liquid cooling and heat dissipation effect, and good temperature uniformity. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the present invention.

[0014] Figure 2 A cross-sectional view of the present invention.

[0015] Figure 3 It is a structural schematic diagram of the inner ring portion with the first bottom portion of the present invention. DETAILED DESCRIPTION

[0016] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0017] Depend on Figures 1 to 3As shown, this embodiment discloses a liquid cooling assembly for a high-voltage DC relay, comprising an inner ring portion 2 and an outer ring portion 3 that are sleeved onto the outside of a relay body 100. The inner ring portion 2 forms a housing for accommodating the relay body. The relay body 100 of this embodiment comprises a yoke cup 11, a push rod 12, a yoke plate 13, a movable spring 14 to which a movable contact is fixed, a lead-out terminal 15 to which a static contact is fixed, and an insulating cover 16. A coil frame 17, a coil, a magnetic conductive cylinder, and other components are provided on the underside of the yoke plate. The bottom of the yoke cup 11 is fixed to the coil frame 17, and the yoke plate 13 and the insulating cover 16 support and secure the coil frame 17. The push rod 12 moves under the action of the energized coil to bring the movable and static contacts into contact, thereby achieving the response of the relay. The inner ring portion 2 of this embodiment has an interference fit with the yoke cup 11.

[0018] A liquid cooling channel 200 is formed between the inner ring portion 2 and the outer ring portion 3. An upper ring portion 21 for closing the upper opening is provided between the upper edge of the inner ring portion 2 and the outer ring portion 3. A lower ring portion 31 for closing the lower opening is provided between the lower edge of the inner ring portion 2 and the outer ring portion 3. A spiral protrusion 22 is also provided between the inner ring portion 2 and the outer ring portion 3 to separate the liquid cooling channel 200 into a spiral channel.

[0019] The outer ring portion 3 is provided with a liquid inlet connector 41 and a liquid outlet connector 42. The liquid inlet connector 41 is located at the lower end of the liquid cooling channel 200, and the liquid outlet connector 42 is located at the upper end of the liquid cooling channel 200. The portion of the liquid inlet connector 41 and the liquid outlet connector 42 located outside the outer ring portion 3 includes a flexible connection portion 40 and a connector portion for connecting to the pipeline. The connector portion is further away from the outer ring portion 3 than the flexible connection portion 40.

[0020] The upper ring portion 21 and spiral protrusion 22 are fixed to the inner ring portion 2. The upper edge of the outer ring portion 3 is higher than that of the inner ring portion 2, forming a glue-filled space 10 on the inner circumferential side of the upper end of the outer ring portion 3. This glue-filled space seals the upper ring portion 21 and the outer ring portion 3. A first bottom portion 20, which closes the lower opening, is provided at the lower end of the inner ring portion 2. The relay body 100 is supported on this first bottom portion 20. A second bottom portion 30, which closes the lower opening, is provided at the lower end of the outer ring portion 3. The outer edge of the second inner portion 30 forms the lower ring portion 31. The cup-shaped structure with the inner ring portion 2 is placed within the cup-shaped structure with the outer ring portion 3 and supported on the second bottom portion 30. The outer circumferential edge of the spiral protrusion 22 is loosely fitted with the inner circumferential wall of the outer ring portion 3. The first bottom portion 20 and the second bottom portion 30 are sealed by applying glue.

[0021] This embodiment has the advantages of high heat exchange efficiency, better liquid cooling and heat dissipation effect, and good temperature uniformity.

Claims

1. A liquid cooling assembly for a high-voltage DC relay, comprising an outer ring portion and an inner ring portion, wherein the inner ring portion is formed with an accommodating cavity for accommodating a relay body, characterized in that: A liquid cooling channel is formed between the inner ring portion and the outer ring portion, an upper ring portion for closing the upper opening is provided between the upper edge of the inner ring portion and the outer ring portion, and a lower ring portion for closing the lower opening is provided between the lower edge of the inner ring portion and the outer ring portion, and a spiral protrusion for dividing the liquid cooling channel into a spiral channel is also provided between the inner ring portion and the outer ring portion, one side of the circumferential sides of the upper ring portion, the spiral protrusion and the lower ring portion is fixed to one of the two components of the inner ring portion and the outer ring portion, the other side of the circumferential sides of the spiral protrusion is adjacent to or in contact with the other of the two components, the other side of the circumferential sides of the upper ring portion and the lower ring portion is connected to and sealed with the other of the two components, and a liquid inlet joint and a liquid outlet joint are provided on the outer ring portion.

2. The liquid cooling assembly for a high-voltage DC relay according to claim 1, characterized in that: The upper ring portion is fixed to the inner ring portion, and the upper edge of the outer ring portion is higher than the upper edge of the inner ring portion, so that a glue-filled space is formed on the inner side of the upper end of the outer ring portion.

3. The liquid cooling assembly for a high-voltage DC relay according to claim 1, characterized in that: The lower end of the inner ring portion is provided with a first bottom portion for closing the lower end opening.

4. The liquid cooling assembly for a high-voltage DC relay according to claim 3, characterized in that: The lower end of the outer ring portion is provided with a second bottom portion that closes the lower end opening, the outer edge of the second inner portion constitutes the lower ring portion, and the first bottom portion and the second bottom portion are sealed.

5. The liquid cooling assembly for a high-voltage DC relay according to claim 1, characterized in that: The parts of the liquid inlet joint and the liquid outlet joint located outside the outer ring portion include a flexible connection portion and a joint portion for connecting to a pipeline, and the joint portion is farther away from the outer ring portion than the flexible connection portion.

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