Heat dissipation device for high-voltage soft-start casket

Abstract

The utility model provides a heat dissipation device for a high-voltage soft-start thyristor, and aims to solve the technical problems that the overall volume and the weight of the high-voltage soft-start thyristor are increased and the service life of the thyristor is shorter in order to improve the heat dissipation effect of the thyristor in the prior art. The heat dissipation device comprises a high-voltage soft start valve group, and the high-voltage soft start valve group comprises a casket tube, a heat dissipation device, an insulation column and a heat pipe. The anode A and / or the cathode C of the casket tube and the radiator are pressed and fixed through the pressing plate and the screw rod, and the insulating column is connected with the other end of the screw rod and is located on one side of the radiator after being connected; the radiator comprises a plurality of radiating fins, and each radiating fin comprises a substrate and a plurality of radiating teeth; the heat pipe is embedded in the substrate of the radiator and comprises an evaporation section and a condensation section, the evaporation section is close to the anode A and / or the cathode C of the casket tube, and the condensation section is close to the radiating teeth. According to the utility model, on the premise of not reducing the heat radiation effect, the volume of the heat radiator is reduced, the temperature rise of the thyristor is reduced, and the service life of the thyristor is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of soft starters, in particular to a heat dissipation device for a high-voltage soft-start crystal tube. Background Art

[0002] High-voltage soft start is a new type of power electronic device that integrates high-voltage motor soft start, soft stop and many monitoring and protection functions. It is widely used in the start-stop, monitoring and protection system of high-voltage motors without speed regulation. In some occasions where high-voltage soft start is used, there is a phenomenon of frequent start and stop. Because the high-voltage soft start drives the high-voltage motor to start, there will be 3 to 6 times the rated current of the motor. Frequent start and stop of the motor will increase the heat of the connection surface between the radiator of the soft start valve group and the pancake thyristor. If the heat cannot be transferred out quickly, the thyristor is prone to overheating and failure. The traditional method is to increase the volume of the radiator, increase the size of the substrate and the heat dissipation teeth, increase the heat dissipation surface of the radiator, and then use the wind from the cooling fan to take away the heat from the heat dissipation surface.

[0003] The traditional method is to increase the volume of the radiator, increase the size of the base plate and the heat dissipation teeth, increase the heat dissipation surface of the radiator, and then use the fan to dissipate the heat from the heat dissipation surface. This solution has the disadvantages of large valve group volume, heavy weight, and high cost, which increases the volume and weight of the high-voltage soft start product, which is not conducive to production assembly, maintenance and transportation. Utility Model Content

[0004] The purpose of the utility model is to solve the technical problem that the overall volume and weight of the high-voltage soft starter are increased and the service life of the thyristor is shortened in order to improve the heat dissipation effect of the thyristor. By improving the structure of the radiator substrate and embedding the heat pipe in the substrate, on the one hand, this structure can quickly transfer the heat of the thyristor to the heat dissipation teeth of the radiator, and then take away the heat on the heat dissipation teeth through the wind of the cooling fan, effectively dissipate the heat of the thyristor quickly, reduce the temperature rise of the thyristor, and extend the service life of the thyristor. On the other hand, this structure can reduce the volume of the radiator substrate and the heat dissipation teeth, thereby reducing the weight of the valve group, and finally reducing the overall volume and weight of the high-voltage soft start, and improving the assemblability and maintainability of the high-voltage soft start.

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

[0006] A heat dissipation device for a high-voltage soft-start crystal tube comprises a high-voltage soft-start valve group, wherein the high-voltage soft-start valve group comprises a crystal tube, a radiator, an insulating tube and a heat pipe; the anode A and / or cathode C of the crystal tube is pressed and fixed to the radiator by a pressing plate and a screw, and the insulating tube is sleeved on the outside of the radiator; the radiator comprises a plurality of heat sinks, and the plurality of heat sinks comprises a substrate and a plurality of heat dissipation teeth located on the surface of the substrate and arranged along the length direction thereof; the heat pipe is embedded in the substrate of the radiator, and comprises an evaporation section and a condensation section, wherein the evaporation section is close to the anode A and / or cathode C of the crystal tube, and the condensation section is close to the heat dissipation teeth.

[0007] The heat dissipation device of the utility model embeds a heat pipe in the substrate of the radiator (a heat pipe is a heat transfer element with extremely high thermal conductivity. It transfers heat by evaporating and condensing liquid in a fully enclosed vacuum tube. It uses fluid principles such as capillary action to achieve a refrigeration effect similar to that of a refrigerator compressor. It has a series of advantages such as high thermal conductivity, excellent isothermal properties, variability of heat flux density, reversibility of heat flow direction, and long-distance heat transfer. The heat exchanger composed of the heat pipe has the advantages of high heat transfer efficiency, compact structure, and low fluid resistance. Compared with metals such as silver, copper, and aluminum, the heat pipe per unit weight can transfer several more The heat of the heat pipe is placed inside the heat sink at the crimping surface of the pancake thyristor and the heat sink, close to the anode A and / or cathode C of the pancake thyristor. The condensation section of the heat pipe surrounds the radiator substrate and is close to the heat dissipation teeth of the heat sink. This structure can quickly transfer the heat of the thyristor to the heat dissipation teeth of the heat sink, and then take away the heat on the heat dissipation teeth through the wind of the cooling fan, effectively dissipating the heat of the thyristor quickly, reducing the temperature rise of the thyristor, extending the service life of the thyristor, and further reducing the volume and weight of the heat sink, thereby reducing the overall volume and weight of the high-voltage soft starter, and improving the assemblability and maintainability of the high-voltage soft starter. Because heat pipes are commonly used in notebook computers, desktop CPU heat sinks and small-volume high-heat heat dissipation systems, the price has already dropped. The cost of adding heat pipes is basically the same as the cost of reducing heat sinks. Under the condition of ensuring the same cost, the product volume is reduced, the weight is reduced, and the temperature rise of the thyristor is reduced, and the heat dissipation effect becomes better.

[0008] As the preferred technical solution:

[0009] Optionally, the heat pipe is a combination of one or more heat pipes, including embedding one heat pipe on the substrate of the same radiator, or embedding two or more heat pipes, and the number of heat pipes can be adjusted according to actual use.

[0010] Optionally, the evaporation section of the heat pipe is located directly above the anode A and / or cathode C of the crystal cartridge tube, and is embedded in the heat sink at the crimping surface of the crystal cartridge tube and the substrate.

[0011] Optionally, the evaporation section is located directly above the anode A and the cathode C of the crystal cassette tube.

[0012] Optionally, the high-pressure soft-start valve group has three phases, and each phase includes a plurality of the crystal oscillators connected in series and a plurality of the crystal oscillators connected in anti-parallel thereto.

[0013] Optionally, the heat pipe is embedded in the heat sink where each crystal cartridge tube is located.

[0014] Optionally, the heat pipe is embedded in the substrate of the radiator means: a groove is provided on the surface of the substrate, and the heat pipe is embedded in the groove and clamped in the groove;

[0015] Optionally, the evaporation section and the condensation section of the heat pipe are distributed in a serpentine shape within the substrate of the heat sink.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. The utility model is a heat sink for a high-voltage soft-start crystal tube. By embedding a heat pipe in the base of the radiator, the heat dissipation effect is effectively improved while reducing the volume and weight of the heat sink in the valve group, thereby reducing the volume and weight of the entire high-voltage soft starter.

[0018] 2. The utility model is a heat dissipation device for a high-voltage soft-start crystal box tube. When the heat pipe used is used to increase the heat dissipation effect, it has the beneficial effect of low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is the front view of the valve group of one phase of the high-voltage soft starter;

[0021] Figure 2 This is a schematic diagram of the structure of the connection between the radiator and the crystal box tube of the utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the radiator of the utility model;

[0023] Figure 4 and Figure 5 This is a schematic diagram of the structure of the heat dissipation device of the utility model;

[0024] Reference numerals:

[0025] 1-crystal box tube; 2-radiator; 21-heat sink; 22-base plate; 23-heat dissipation teeth; 221-evaporation section; 222-condensation section; 223-groove; 3-insulation tube; 4-heat pipe; 5-pressing plate; 6-screw. DETAILED DESCRIPTION

[0026] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the products of the present invention are conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0031] The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are merely examples, and the purpose is not to limit the utility model. In addition, the utility model may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides examples of various specific processes and materials, but those of ordinary skill in the art may be aware of the application of other processes and / or the use of other materials.

[0032] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0033] The present invention provides a heat dissipation device for a high-voltage soft-start crystal tube, including a high-voltage soft-start valve group. Usually, the high-voltage soft-start valve group in a high-voltage soft starter has three phases, each phase includes a plurality of crystal tubes 1 connected in series and a plurality of crystal tubes connected in anti-parallel therewith, such as Figure 1 and 2 As shown, the high-voltage soft-start valve group includes a crystal tube 1, a radiator 2, an insulating tube 3 and a heat pipe 4; the anode A and / or cathode C of the crystal tube 1 and the radiator 2 are pressed and fixed by a pressing plate 5 and a screw 6, and the insulating tube 3 is sleeved on the outside of the radiator 2, that is, the insulating tube 3 passes through the entire radiator 2 from top to bottom.

[0034] The heat sink 2 includes a plurality of heat sinks 21, such as Figure 3 As shown, Figure 3 The number of heat sinks 21 shown in the figure is 4, and the heat sink 21 includes a base plate 22 and a plurality of heat sink teeth 23 located on the surface of the base plate 22 and arranged along the length direction thereof. The heat sink teeth can increase the heat dissipation surface and quickly dissipate the heat. The more heat sink teeth there are, the better the heat dissipation effect. The heat pipe 4 is embedded in the base plate 22 of the radiator 2, as shown in FIG. Figure 4 and 5As shown, it includes an evaporation section 221 and a condensation section 222, wherein the evaporation section 221 is close to the anode A and / or cathode C of the crystal cassette tube 1, specifically: the evaporation section 221 is located directly above the anode A of the crystal cassette tube 1, or directly above the cathode C, or directly above the anode A and the cathode C at the same time, and is embedded in the heat sink 2 of the crimping surface of the crystal cassette tube 1 and the substrate 22, and the condensation section 222 is close to the heat dissipation teeth 23. A groove 223 is provided on the surface of the substrate 22, and the heat pipe 4 is clamped in the groove 223 after being embedded in the groove 223. The size of the groove can be cut by machining according to parameters such as the diameter of the heat pipe. When the heat pipe is installed in the groove, the heat pipe is clamped and embedded in the substrate without falling off, and can be easily replaced when a heat pipe fails. The evaporation section and the condensation section of the heat pipe 4 of the present embodiment are both linearly embedded in the substrate 22. As a preferred solution, the evaporation section and the condensation section of the heat pipe can also be distributed in a serpentine shape in the substrate of the heat sink (not shown in the figure, the same as the existing conventional arrangement). The serpentine distribution can further increase the heat transfer area and further improve the heat dissipation effect, and is suitable for valve groups with high heat dissipation requirements.

[0035] Figure 1 What is shown in the figure is the front view of a valve group of one phase, with a total of 5 thyristors connected in series. The purpose of the series connection is to improve the withstand voltage of the thyristor. The more thyristors are connected in series, the higher the voltage allowed to be applied to both ends. After the series connection, it is anti-parallel connected with the other 5 thyristors connected in series to realize AC phase shift voltage regulation control. According to the actual withstand voltage of the thyristors and the grid voltage, a high-voltage soft-start valve group consisting of multiple thyristors connected in series and then anti-parallel can be designed. In this embodiment, a heat pipe 4 is embedded in the radiator connected to each thyristor tube connected in series and anti-parallel. The position and number of the heat pipes can be arranged according to the actual situation, that is, heat pipes can be installed on each substrate of each radiator, or heat pipes can be installed on 1, 2 or 3 substrates of each radiator, or heat pipes can be installed on the radiator where each thyristor tube is located. In order to achieve the lowest cost and the maximum benefit, flexible adjustment can be made.

[0036] The utility model discloses a heat dissipation device for a high-voltage soft-start thyristor tube, wherein the evaporation section of the heat pipe is placed inside the radiator between the pancake-shaped thyristor and the radiator crimping surface, close to the anode A and / or cathode C of the pancake-shaped thyristor, and the condensation section of the heat pipe is surrounded by the radiator substrate, close to the heat dissipation teeth of the radiator. This structure can quickly transfer the heat of the thyristor to the heat dissipation teeth of the radiator, and then take away the heat on the heat dissipation teeth through the wind of the heat dissipation fan, effectively dissipate the heat of the thyristor quickly, reduce the temperature rise of the thyristor, and extend the service life of the thyristor. In addition, while ensuring the heat dissipation effect, the volume of the radiator substrate and the heat dissipation teeth can be reduced, thereby reducing the weight of the valve group, and finally reducing the overall volume and weight of the high-voltage soft starter, thereby improving the assemblability and maintainability of the high-voltage soft starter.

Claims

1. A heat dissipation device for a high voltage soft start crystal tube, characterized in that: It includes a high-voltage soft-start valve group, which includes a crystal tube, a heat sink, an insulating column and a heat pipe; the anode A and / or cathode C of the crystal tube is pressed and fixed to the heat sink through a pressing plate and a screw, and the insulating column is connected to the other end of the screw, and is located on one side of the heat sink after connection; the heat sink includes a plurality of heat sinks, and the plurality of heat sinks include a substrate and a plurality of heat dissipation teeth located on the surface of the substrate and arranged along the length direction thereof; the heat pipe is embedded in the substrate of the heat sink, and includes an evaporation section and a condensation section, the evaporation section is close to the anode A and / or cathode C of the crystal tube, and the condensation section is close to the heat dissipation teeth.

2. A heat dissipation device for a high voltage soft start crystal tube according to claim 1, characterized in that: The heat pipe is a combination of one or more heat pipes.

3. A heat dissipation device for a high voltage soft start crystal tube according to claim 2, characterized in that: The evaporation section of the heat pipe is located directly above the anode A and / or cathode C of the crystal cartridge tube, and is embedded in the interior of the heat sink at the crimping surface of the crystal cartridge tube and the substrate.

4. A heat dissipation device for a high voltage soft start crystal tube according to claim 3, characterized in that: The evaporation section is located directly above the anode A and the cathode C of the crystal chamber tube.

5. The heat dissipation device for a high voltage soft start crystal tube according to claim 1, characterized in that: The high-pressure soft-start valve group has three phases in total, and each phase includes a plurality of the crystal oscillators connected in series and another plurality of the crystal oscillators connected in series in anti-parallel.

6. A heat dissipation device for a high voltage soft start crystal tube according to claim 5, characterized in that: The heat pipe is embedded in the radiator where each crystal box tube is located.

7. A heat dissipation device for a high voltage soft start crystal tube according to claim 6, characterized in that: The heat pipe is embedded in the substrate of the radiator means that a groove is provided on the surface of the substrate, and the heat pipe is embedded in the groove and clamped.

8. The heat dissipation device for a high voltage soft start crystal tube according to claim 1, characterized in that: The evaporation section and the condensation section of the heat pipe are distributed in the substrate of the heat sink in a snake shape.

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