Ceramic resistor with heat dissipation structure

Abstract

The utility model discloses a ceramic resistor with a heat dissipation structure, which comprises a resistor tube, a pin for circuit connection is arranged at the bottom end of the resistor tube, a protective layer for protecting the resistor tube is arranged outside the resistor tube, and a fin plate for heat dissipation of the resistor tube is arranged outside the resistor tube. A covering layer used for covering the fin plate is arranged outside the resistance tube, and an accelerating assembly used for accelerating the flow speed of airflow is arranged in the covering layer. By utilizing the design of the resistance tube, the fin plates, the covering layer and the acceleration assembly, the plurality of fin plates arranged outside the resistance tube are covered by the covering layer, and one end of each fin plate extends into the acceleration groove, so that when air flow enters the acceleration groove through the air inlet groove, the air flow can be extruded, and the fin plates are prevented from being damaged. And therefore, the heat exchange speed of the fin plate is accelerated, and the heat dissipation speed of the resistance tube is accelerated.

Description

Technical Field

[0001] The utility model relates to the field of electrical equipment, and particularly relates to a ceramic resistor with a heat dissipation structure. Background Technique

[0002] Ceramic resistors are usually used in circuits with large current and high voltage. However, due to the poor heat dissipation performance of the ceramic material itself, other materials are used for auxiliary heat dissipation. Usually, the most common method is to use a metal plate as a fin, which surrounds the outside of the ceramic resistor to absorb and dissipate heat. However, the air flow velocity between the fins is uniform, so the heat exchange speed of the fins is affected. Content of the Utility Model

[0003] The purpose of the utility model is to provide a ceramic resistor with a heat dissipation structure to solve the problems put forward in the above background technique.

[0004] To achieve the above purpose, the utility model provides the following technical solution: A ceramic resistor with a heat dissipation structure includes a resistor tube. A pin for circuit connection is arranged at the bottom end of the resistor tube. A protective layer for protecting the resistor tube is arranged outside the resistor tube. A fin for dissipating heat of the resistor tube is arranged outside the resistor tube. A covering layer for covering the fin is arranged outside the resistor tube. An accelerating component for accelerating the air flow velocity is arranged inside the covering layer.

[0005] Preferably, splicing grooves are respectively arranged at both ends of the covering layer, and an adhesive for adhesively connecting the splicing grooves to each other is arranged on the opposite side of the splicing grooves.

[0006] Preferably, the adhesive includes a first adhesive layer and a second adhesive layer, and one sides of the first adhesive layer and the second adhesive layer are respectively fixedly connected to the opposite sides of the two splicing grooves.

[0007] Preferably, the protective layer is sleeved on the outer wall of the resistor tube, the covering layer is sleeved on the outer wall of the protective layer, an insertion groove for inserting the fin is arranged on the side of the covering layer close to the protective layer, and the accelerating component is arranged at one end of the insertion groove far from the protective layer.

[0008] Preferably, the accelerating component includes an accelerating groove and air inlet grooves symmetrically arranged at both ends of the accelerating groove, and the accelerating groove is connected to the opposite side of the insertion groove in a through manner.

[0009] Preferably, the air inlet groove is frustum-shaped, and the accelerating groove is cylindrical.

[0010] Technical effects and advantages of the utility model:

[0011] The utility model utilizes the design of a resistance tube, fin plates, a covering layer and an acceleration component. The covering layer wraps multiple fin plates arranged outside the resistance tube, and one end of the fin plate extends into the acceleration groove. When air flow enters the acceleration groove through the air inlet groove, it will be squeezed, so that the air flow velocity inside the acceleration groove is increased, thereby accelerating the heat exchange speed of the fin plate and thus accelerating the heat dissipation speed of the resistance tube. Brief Description of the Drawings

[0012] Figure 1 It is a schematic three-dimensional structure diagram of the utility model.

[0013] Figure 2 It is a schematic front sectional structure diagram of the utility model.

[0014] Figure 3 It is a schematic side sectional structure diagram of the utility model.

[0015] Figure 4 For the utility model Figure 3 Schematic enlarged structure diagram of A in it.

[0016] In the figure: 1, resistance tube; 2, pin; 3, protective layer; 4, fin plate; 5, air inlet groove; 6, acceleration groove; 7, covering layer; 8, insertion groove; 9, first adhesive layer; 10, second adhesive layer. Detailed Embodiment

[0017] Next, the technical solutions in the embodiments of the utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the utility model.

[0018] The utility model provides a ceramic resistor with a heat dissipation structure as Figures 1-4 shown, including a resistance tube 1. A pin 2 for circuit connection is arranged at the bottom end of the resistance tube 1. A protective layer 3 for protecting the resistance tube 1 is arranged outside the resistance tube 1. Fin plates 4 for heat dissipation of the resistance tube 1 are arranged outside the resistance tube 1. A covering layer 7 for wrapping the fin plates 4 is arranged outside the resistance tube 1. An acceleration component for accelerating the air flow velocity is arranged inside the covering layer 7.

[0019] Specifically, the resistance tube 1, the pin 2, and the protective layer 3 form an existing enamel ceramic wire-wound resistor of model RX20. A plurality of fin plates 4 are provided and arranged at equal intervals in a ring along the outer wall of the resistance tube 1. The length of the fin plate 4 is 0.95 times the length of the acceleration groove 6. The fin plate 4 is made of a silicone heat sink. The silicone heat sink is a soft thermal conductive interface sheet material based on addition-cured silicone rubber, added with thermal conductive fillers, additives, etc., and cured by an addition reaction. It can fill gaps, complete heat transfer between the heat-generating part and the heat-dissipating part, and at the same time play roles such as insulation, vibration damping, and sealing, meeting the design requirements of equipment miniaturization and ultra-thinness. It is a flexible thermal conductive filling material with excellent performance. One end of the fin plate 4 penetrates through the protective layer 3 and contacts the outer wall of the resistance tube 1. The part where the fin plate 4 contacts the protective layer 3 is fixedly connected by gluing.

[0020] Specifically, splicing grooves are respectively opened at both ends of the covering layer 7. On the opposite sides of the splicing grooves, there are bonding members for bonding the splicing grooves to each other. The bonding members include a first bonding layer 9 and a second bonding layer 10. One sides of the first bonding layer 9 and the second bonding layer 10 are respectively fixedly connected to the opposite sides of the two splicing grooves.

[0021] Furthermore, the splicing groove is trapezoidal. The covering layer 7 is a copper sheet. A through groove for inserting the pin 2 is opened at the bottom end of the covering layer 7. By rotating the covering layer 7, the covering layer 7 is formed into a hollow cylindrical shape. The splicing grooves at both ends of the covering layer 7 fit together. The opposite sides of the two splicing grooves are respectively bonded through the fixedly installed first bonding layer 9 and second bonding layer 10, so as to fixedly install the covering layer 7 on the outer wall of the protective layer 3.

[0022] Specifically, the protective layer 3 is sleeved on the outer wall of the resistance tube 1, and the covering layer 7 is sleeved on the outer wall of the protective layer 3. An insertion groove 8 for inserting the fin plate 4 is opened on the side of the covering layer 7 close to the protective layer 3. The acceleration component is arranged at one end of the insertion groove 8 away from the protective layer 3. The acceleration component includes an acceleration groove 6 and air inlet grooves 5 symmetrically arranged at both ends of the acceleration groove 6. The acceleration groove 6 and the insertion groove 8 are connected through on the opposite sides. The air inlet groove 5 is frustum-shaped, and the acceleration groove 6 is cylindrical.

[0023] Furthermore, on the side of the covering layer 7 close to the resistance tube 1, insertion slots 8 are opened according to the spacing of the fin plates 4. The width of the insertion slots 8 is 1.02 times the width of the fin plates 4. The part where the acceleration slot 6 is connected to the insertion slots 8 is provided in a through manner, so that one end of the fin plate 4 far from the resistance tube 1 extends into the interior of the acceleration slot 6. The height at which the fin plate 4 extends into the acceleration slot 6 is three-quarters of the cross-sectional dimension of the acceleration slot 6. The number of acceleration components provided corresponds one-to-one with the number of fin plates 4 provided. The acceleration component is jointly composed of the acceleration slot 6 and two air inlet slots 5. The small circular surface of the frustum-shaped air inlet slot 5 has the same dimension as the circular surface of the acceleration slot 6, and the small circular surface of the air inlet slot 5 is connected to the acceleration slot 6 in a through manner. The air inlet slots 5 are symmetrically arranged at both ends, which can ensure that when the air flow changes its flow direction at any time, the air flow can be squeezed through the air inlet slots 5. When the air flow enters from the air inlet slots 5, the air flow will flow along the shape of the air inlet slots 5. As the air inlet slots 5 change from the large circular surface to the small circular surface, the space is contracted, so that the air flow is squeezed, and the flow velocity of the air flow is increased. The accelerated air flow enters the acceleration slot 6, which can accelerate the heat exchange at one end of the fin plate 4 extending into the acceleration slot 6 and is carried out of the acceleration slot 6, so as to realize the heat dissipation efficiency of the resistance tube 1. At the same time, because the covering layer 7 is made of copper material, the heat in the acceleration slot 6 can also be exchanged with the air outside the covering layer 7 through the covering layer 7, so that the covering layer 7 realizes the function of increasing the heat dissipation area. In the design of the acceleration component and the covering layer 7, the heat dissipation capacity of the resistance tube 1 is further enhanced, ensuring that when the resistance tube 1 is in use, it will not be damaged and fail due to overheating.

[0024] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A ceramic resistor with a heat dissipation structure, comprising a resistor tube (1), pins (2) for circuit connection are arranged at the bottom end of the resistor tube (1), and a protective layer (3) for protecting the resistor tube (1) is arranged outside the resistor tube (1), characterized in that, An external of the resistance tube (1) is provided with fin plates (4) for dissipating heat of the resistance tube (1), an external of the resistance tube (1) is provided with a covering layer (7) for covering the fin plates (4), and an inside of the covering layer (7) is provided with an accelerating component for accelerating an air flow velocity.

2. The ceramic resistor with a heat dissipation structure according to claim 1, characterized in that, Both ends of the covering layer (7) are respectively provided with splicing grooves, and a bonding piece for bonding the splicing grooves to each other is arranged on a relative side of the splicing grooves.

3. The ceramic resistor with a heat dissipation structure according to claim 2, wherein The bonding piece includes a first bonding layer (9) and a second bonding layer (10), and one sides of the first bonding layer (9) and the second bonding layer (10) are respectively fixedly connected to relative sides of the two splicing grooves.

4. A ceramic resistor with a heat dissipation structure according to claim 1, characterized in that, The protective layer (3) is sleeved on an outer wall of the resistance tube (1), the covering layer (7) is sleeved on an outer wall of the protective layer (3), an inserting groove (8) for inserting the fin plates (4) is formed in a side of the covering layer (7) close to the protective layer (3), and the accelerating component is arranged at one end of the inserting groove (8) far from the protective layer (3).

5. A ceramic resistor with a heat dissipation structure according to claim 4, characterized in that, The accelerating component includes an accelerating groove (6) and air inlet grooves (5) symmetrically arranged at two ends of the accelerating groove (6), and a side of the accelerating groove (6) opposite to the inserting groove (8) is connected in a through manner.

6. The ceramic resistor with a heat dissipation structure according to claim 5, characterized in that, The air inlet groove (5) is frustum-shaped, and the accelerating groove (6) is cylindrical.

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