CN210273810U

CN210273810U - Frequency converter with heat dissipation structure

Info

Publication number: CN210273810U
Application number: CN201921344335.XU
Authority: CN
Inventors: 赵剩勇; 雷霆; 李丰
Original assignee: Hunan Kulingster Technology Co Ltd
Current assignee: Hunan Kulingster Technology Co Ltd
Priority date: 2019-08-19
Filing date: 2019-08-19
Publication date: 2020-04-07
Anticipated expiration: 2029-08-19

Abstract

A frequency converter with a heat dissipation structure comprises a frequency converter body; a heat dissipating structure comprising a loop thermosiphon thermally coupled to the converter body, and a heat exchanger thermally coupled to the loop thermosiphon, the heat exchanger being remote from and above the converter body, the loop thermosiphon being a continuous, endless closed conduit; and a heat-dissipating ink layer coated on a surface of the heat exchanger. The utility model discloses a take heat radiation structure, its simple structure, it is good to the radiating effect of converter body, application scope is wide, but also can be applied to in the less and poor rack environment of radiating effect of installation space, through heat exchange heat dissipation and radiation heat dissipation make the produced heat of converter body in time discharge to normal, the stable work of converter body has been guaranteed.

Description

Frequency converter with heat dissipation structure

Technical Field

The utility model relates to a power equipment technical field, concretely relates to take heat radiation structure's converter.

Background

A Variable-frequency Drive (VFD) is a power control device that applies frequency conversion technology and microelectronics technology to control an ac motor by changing the frequency of a working power supply of the motor. The frequency converter mainly comprises a rectifying unit (alternating current to direct current), a filtering unit, an inverting unit (direct current to alternating current), a braking unit, a driving unit, a detection unit micro-processing unit and the like. The frequency converter adjusts the voltage and frequency of an output power supply by switching on and off an internal IGBT, provides the required power supply voltage according to the actual requirement of the motor, and further achieves the purposes of energy saving and speed regulation. With the continuous improvement of the industrial automation degree, the frequency converter is also widely applied. Therefore, when the frequency converter performs rectification, filtering, inversion, braking, driving, detection and other work, the frequency converter generates heat, and when the heat is too high, the working performance of the frequency converter is affected, and even the frequency converter cannot work normally. Therefore, there is a need for a new frequency converter with a heat dissipation structure to solve or at least reduce the above problems.

Disclosure of Invention

The utility model discloses a solve the above-mentioned problem that prior art exists, provide a take heat radiation structure's converter, heat radiation structure through coating heat dissipation printing ink layer carries out heat exchange heat dissipation and radiation heat dissipation to the converter body to avoid converter body during operation temperature rise too high, guaranteed normal, the stable work of converter body.

In order to achieve the above object, an embodiment discloses a frequency converter with a heat dissipation structure, including:

a frequency converter body;

a heat dissipating structure comprising a loop thermosiphon thermally coupled to the converter body, and a heat exchanger thermally coupled to the loop thermosiphon, the heat exchanger being remote from and above the converter body, the loop thermosiphon being a continuous, endless closed conduit; and

and the heat dissipation ink layer is coated on the surface of the heat exchanger.

As a further preferred technical scheme of the utility model, the heat absorption section of loop thermosiphon is snakelike the dish bent in metal casing and/or the inner space of converter body.

As a further preferable technical solution of the present invention, the loop thermosiphon is bent in a manner that a portion on the metal casing is flat, and is in close contact with the metal casing.

As a further preferred technical solution of the present invention, the loop thermosiphon is twisted in the portion of the inner space of the frequency converter body is in a circular tube shape.

As a further preferred technical scheme of the utility model, the pipe diameter that is the loop thermosiphon of platykurtic is not less than be the pipe diameter of circle pipy loop thermosiphon.

As a further preferred technical scheme of the utility model, heat exchanger is the metal base that has good heat conductivility, the heat dissipation section of loop thermosiphon be snakelike the dish bend in heat exchanger's inside.

As the utility model discloses a further preferred technical scheme, still be connected with cooling body on the heat exchanger, cooling body includes circulation condensation pipeline, medium pump and radiator, heat exchanger has the heat exchange chamber that heat supply exchange medium passes through, and communicates the medium entry and the medium export in heat exchange chamber, the heat dissipation section of loop thermosiphon distribute in around the heat exchange chamber, the first end of circulation condensation pipeline is passed through the medium entry intercommunication extremely heat exchange chamber, the second end of circulation condensation pipeline communicate in proper order to the medium pump the radiator communicates to the medium export, the radiator is kept away from heat exchanger sets up.

As a further preferable technical solution of the present invention, the heat exchange medium is water or cooling oil.

The utility model discloses heat dissipation ink layer surface has a lot of unevenness's granule to pack, compares with metal surface and has increased microcosmic heat transfer area, has phase change material in the heat dissipation ink, and evenly distributed can carry out the phase transition at the surface that the granule packed at suitable temperature phase change material, can absorb heat in the time of the phase transition, can reduce metal surface temperature, then heat dissipation ink coating continuously distributes away absorbed heat through radiation heat dissipation. Thus achieving the purpose of heat dissipation. The heat dissipation ink layer of the utility model also has the functions of corrosion resistance and acid and alkali resistance to the metal surface, and is not afraid of water and oil.

The utility model discloses a can reach following beneficial effect:

1) the working fluid of the loop thermosiphon only needs to be evaporated and condensed in a closed circulating pipeline, heat is transferred within a given distance, high-efficiency and long-distance transmission of high-power heat energy is realized, and thus, the overhigh temperature rise of the frequency converter body during working is avoided.

2) The loop thermosiphon has no moving part, can drive the flow of working fluid by means of the self gravity of the condensate, belongs to a gravity-driven two-phase cooling structure, and has higher reliability compared with an active liquid cooling liquid and a vapor compression or pumping two-phase cooling structure.

3) The heat dissipation ink layer is coated, so that the surface heat dissipation coefficient of the heat exchanger is high, the radiation capability is strong, and the heat dissipation performance of the heat exchanger is improved;

4) simple structure can be applied to that installation space is less, in the poor rack environment of radiating effect, and the heat that makes the converter body produce through the heat exchange heat dissipation can in time be discharged to normal, the steady operation of converter body has been guaranteed.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

In the figure: 1. a frequency converter body; 2. a loop thermosiphon; 3. a heat exchanger; 4. a circulating condensing pipeline; 5. a medium pump; 6. a heat sink.

The purpose of the present invention is to provide a novel and improved method and apparatus for operating a computer.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description. In the preferred embodiments, the terms "upper", "lower", "left", "right", "middle" and "a" are used for the sake of clarity only, and are not intended to limit the scope of the invention, its relative relationship between the terms and their derivatives, and the scope of the invention should be understood as being limited by the claims.

As shown in fig. 1, the embodiment of the utility model discloses a frequency converter with a heat dissipation structure, which comprises a frequency converter body 1; the heat dissipation structure comprises a loop thermosiphon 2 connected to the frequency converter body 1 in a heat transfer mode, and a heat exchanger 3 connected to the loop thermosiphon 2 in a heat transfer mode, wherein the heat exchanger 3 is far away from and positioned above the frequency converter body 1, and the loop thermosiphon 2 is a continuous annular closed pipeline; and the heat dissipation ink layer is coated on the surface of the heat exchanger 3, the heat dissipation performance of the heat exchanger 3 is improved through the heat dissipation ink layer, so that the condensation effect on the loop thermosiphon 2 is met, the heat generated by the frequency converter body 1 is effectively conducted to the heat exchanger 3 through the loop thermosiphon 2, and the heat is diffused in the air through passive heat dissipation of the heat exchanger 3. When the heat dissipation performance of the heat exchanger 3 is limited in some special environments, such as an excessive ambient temperature, a cooling mechanism may be optionally connected to the heat exchanger 3 to increase the heat conduction capability of the heat exchanger 3, and a heat dissipation ink layer may be coated to increase the active heat dissipation capability.

Among them, the loop thermosiphon 2 is a type of heat pipe, but it transfers heat using vaporization and condensation of the working medium, and self-weight circulation of the working medium, as in the general heat pipe. The difference between the heat pipe and the common heat pipe is that no wick is arranged in the pipe, and the condensed liquid flows back to the evaporation section from the condensation section not depending on the capillary force generated by the wick but depending on the gravity of the condensed liquid. Therefore, the thermosiphon is also called a gravity heat pipe or a coreless heat pipe, or called a two-phase closed thermosiphon. In the working process, the working medium is condensed at the heat exchanger 3 and flows downwards from the condensation section to the connection part of the frequency converter body 1 under the action of gravity, and the loop thermosiphon 2 absorbs heat; working medium gasification after the heat absorption and through evaporation zone backward flow income heat exchanger 3, at this moment, working medium is condensed once more to discharge the heat absorbed on converter body 1, the working medium circulation flows, thereby realizes carrying out stable heat dissipation cooling to converter body 1, ensures that converter body 1 normally, stable work.

Coat in the heat dissipation ink layer on heat exchanger 3's surface for heat exchanger 3's surface coefficient of heat dissipation is high, the radiation ability is strong, and then improves heat exchanger 3's heat dispersion, makes the produced heat of converter body 1 transmit to heat exchanger 3 through loop thermosiphon 2, and by heat exchanger 3 rapid diffusion in the air, thereby avoid converter body during operation temperature rise too high, guaranteed normal, the steady operation of converter body.

In the concrete implementation, the loop thermosiphon 2 on the frequency converter body 1 is snakelike to coil in the metal casing and/or the inner space of the frequency converter body 1, and snakelike coiling is adopted for increasing the heat transmission area of the loop thermosiphon 2 on the frequency converter body 1, wherein, the loop thermosiphon 2 on the metal casing of the frequency converter body 1 is contact heat conduction, and the loop thermosiphon 2 in the inner space of the frequency converter body 1 is heat radiation heat conduction. In practical use, one or a combination of two ways can be selected according to the heat transfer efficiency, so that the heat generated by the high-heat generating components in the frequency converter body 1 can be discharged from the loop thermosiphon 2 in an optimal way.

In specific implementation, the frequency converter body 1 is located in a cabinet, the heat exchanger 3 is located at the top outside the cabinet, the frequency converter body 1 is connected with the heat exchanger 3 through the loop thermosiphon 2, and the loop thermosiphon 2 is a circulation pipeline and is manufactured on site according to the layout of the cabinet.

In specific implementation, the part of the loop thermosiphon 2, which is coiled on the metal shell, is flat and is in close contact with the metal shell, and because the structure is contact heat conduction, the flat loop thermosiphon 2 can increase the contact area between the loop thermosiphon 2 and the metal shell of the frequency converter body 1, thereby improving the heat absorption capacity.

In the concrete implementation, 2 coils of loop thermosiphon are the pipe form in the part of the inner space of converter body 1, because this structure is radiation type heat-conduction, and the pipe form does benefit to the heat transfer between 2 and the air of loop thermosiphon more, absorbs the heat through the radiation type heat-conduction mode because of the produced heat of electric element in converter body 1 to solved 1 inner space of converter body and can't appear the problem of unable effective heat dissipation because of sealed.

In specific implementation, the pipe diameter of the flat loop thermosiphon 2 is not less than that of the circular loop thermosiphon 2, so as to ensure that the working medium in the loop thermosiphon 2 flows uniformly, which is beneficial to heat conduction.

The heat exchanger 3 is a metal seat with good heat conducting performance, and the heat radiating section of the loop thermosiphon 2 is coiled in a snake shape inside the heat exchanger 3.

In specific implementation, the heat exchanger 3 is further connected with a cooling mechanism for cooling the heat exchanger 3, the cooling mechanism comprises a circulating condensation pipeline 4, a medium pump 5 and a radiator 6, the heat exchanger 3 is provided with a heat exchange cavity for heat exchange medium to pass through, and a medium inlet and a medium outlet communicated with the heat exchange cavity, the radiating sections of the loop thermosiphon 2 are distributed around the heat exchange cavity, the first end of the circulating condensation pipeline 4 is communicated to the heat exchange cavity through the medium inlet, the second end of the circulating condensation pipeline 4 is sequentially communicated to the medium pump 5 and the radiator 6 and is communicated to the medium outlet, and the radiator 6 is far away from the heat exchanger 3. The heat exchange medium is water or cooling oil, and can be selected according to actual requirements.

The utility model discloses a take heat radiation structure's converter, simple structure, it is good to the radiating effect of converter body, application scope is wide, but also can be applied to in the less and poor rack environment of radiating effect of installation space, makes the produced heat of converter body can in time discharge through the heat exchange heat dissipation to normal, the stable work of converter body has been guaranteed.

Although specific embodiments of the present invention have been described above, it will be appreciated by those skilled in the art that these are merely examples and that many changes and modifications may be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims.

Claims

1. The utility model provides a take heat radiation structure's converter which characterized in that includes:

a frequency converter body;

2. The frequency converter with a heat dissipating structure of claim 1, wherein the heat absorbing section of the loop thermosiphon is serpentine-shaped and curved to the metal casing and/or the inner space of the frequency converter body.

3. The frequency converter with a heat dissipating structure according to claim 2, wherein a portion of the loop thermosiphon coil bent on the metal case is flat and in close contact with the metal case, and a portion of the loop thermosiphon coil bent in the inner space of the frequency converter body is in a shape of a circular pipe.

4. The frequency converter with a heat dissipating structure according to claim 3, wherein a tube diameter of the loop thermosiphon in a flat shape is not smaller than a tube diameter of the loop thermosiphon in a circular tube shape.

5. The frequency converter with a heat dissipating structure according to claim 3, wherein the heat exchanger is a metal holder having a heat conductive property, and the heat dissipating section of the loop thermosiphon is serpentine-curved to the inside of the heat exchanger.

6. The frequency converter with a heat dissipation structure as recited in any one of claims 1 to 5, wherein a cooling mechanism is further connected to the heat exchanger, the cooling mechanism includes a circulating condensation line, a medium pump and a radiator, the heat exchanger has a heat exchange cavity for passing a heat exchange medium, and a medium inlet and a medium outlet communicating with the heat exchange cavity, the heat dissipation sections of the loop thermosiphon are distributed around the heat exchange cavity, a first end of the circulating condensation line is communicated to the heat exchange cavity through the medium inlet, a second end of the circulating condensation line is communicated to the medium pump, the radiator and the medium outlet in sequence, and the radiator is disposed away from the heat exchanger.

7. The frequency converter with a heat dissipation structure as recited in claim 6, wherein the heat exchange medium is water or cooling oil.