阅读说明：本技术 密封柜体的散热方法及系统 (Heat dissipation method and system for sealed cabinet ) 是由 刘永利 姜春苗 韩宏权 马书明 于 2019-10-08 设计创作，主要内容包括：本发明涉及一种密封柜体的散热方法及系统,所述方法包括：检测柜体内导热系数大于空气的第一气体浓度；当所述第一气体浓度小于第一预设阈值时,将所述柜体内的空气排出；向所述柜体内充入所述第一气体直至所述第一气体浓度大于等于第一预设阈值,使所述第一气体在所述柜体和冷却装置之间循环流动进行散热。由于第一气体的导热系数大于空气的导热系数,同等体积的空气和第一气体,后者可带走更多的热量,从而快速降低柜体内的温度,使柜体内的元器件处于适温环境下工作。因此,不仅能够保证元器件的稳定性,使机柜正常运行；而且能够保证元器件的使用寿命。(The invention relates to a heat dissipation method and a heat dissipation system for a sealed cabinet body, wherein the method comprises the following steps: detecting a first gas concentration of air in the cabinet body, wherein the heat conductivity coefficient of the cabinet body is greater than that of the air; when the first gas concentration is smaller than a first preset threshold value, exhausting the air in the cabinet body; and filling the first gas into the cabinet body until the concentration of the first gas is greater than or equal to a first preset threshold value, so that the first gas circularly flows between the cabinet body and the cooling device to dissipate heat. Because the heat conductivity coefficient of the first gas is greater than that of the air, the air and the first gas with the same volume can take away more heat, so that the temperature in the cabinet body is quickly reduced, and the components in the cabinet body work in a proper temperature environment. Therefore, the stability of the components can be ensured, and the cabinet can normally operate; and the service life of the components can be ensured.)

1. A method of dissipating heat from a sealed cabinet, the method comprising:

detecting a first gas concentration of air in the cabinet body, wherein the heat conductivity coefficient of the cabinet body is greater than that of the air;

when the first gas concentration is smaller than a first preset threshold value, exhausting the air in the cabinet body;

and filling the first gas into the cabinet body until the concentration of the first gas is greater than or equal to a first preset threshold value, so that the first gas circularly flows between the cabinet body and the cooling device to dissipate heat.

2. The method of claim 1, wherein the first gas is less dense than air.

3. The method of claim 1, wherein the air within the cabinet is evacuated by charging the cabinet with the first gas.

4. The method according to claim 1, characterized in that the air inside the cabinet is evacuated by filling the cabinet with a second gas having a density different from the first gas and not reacting with the first gas until the second gas concentration is greater than or equal to a second preset threshold value; and recovering the second gas during the charging of the first gas.

5. The method of claim 4, wherein the second gas is carbon dioxide.

6. The method of claim 1, wherein the first gas is hydrogen or helium.

7. The method of claim 1, further comprising:

and when the first gas leaks, sending out an alarm signal.

8. A heat dissipation system for a sealed cabinet, characterized in that the heat dissipation method for the sealed cabinet according to any one of claims 1 to 7 is adopted.

9. The heat dissipating system for a sealed cabinet according to claim 8, comprising:

the exhaust device is used for exhausting air in the cabinet body;

the first detector is used for detecting the concentration of the first gas in the cabinet body;

the pipeline device connects the cooling device and the cabinet body to form a heat dissipation loop for the first gas to flow circularly;

a first gas supply means for supplying the first gas; and

and the controller is used for controlling the first detector and controlling the operation of the exhaust device, the pipeline device and the first gas supply device according to the first gas concentration detected by the first detector.

10. The heat dissipating system of the sealed cabinet of claim 9, wherein the conduit means comprises: and the cooling device, the air inlet and the air outlet of the cabinet body are connected into a pipeline of the heat dissipation loop, and the driving part is used for driving the first gas to circularly flow in the heat dissipation loop.

11. The heat dissipating system of the sealed cabinet according to claim 10, wherein the driving part comprises a first exhaust fan disposed at the air inlet and/or a second exhaust fan disposed at the air outlet.

12. The heat dissipating system of a sealed cabinet of claim 11, wherein the driving component comprises a circulating fan disposed at the bottom of the cabinet.

13. The heat dissipating system of the sealed cabinet according to claim 11, wherein the first air supply is in communication with the cooling device, and the duct means includes a first air inlet valve disposed at the air outlet.

14. The heat dissipating system for a sealed cabinet of claim 9, wherein the first air supply communicates with the cabinet through a first air inlet valve.

15. The heat dissipating system of the sealed cabinet of claim 9, further comprising:

the second gas supply device receives the instruction of the controller to supply or recover the second gas;

and the second detector receives the instruction of the controller to detect the concentration of the second gas in the cabinet body.

16. The heat dissipating system for a sealed cabinet according to claim 15, wherein said second air supply means comprises: and the second air inlet valve is connected with the cabinet body through the second air inlet valve and is used for releasing or storing the replacement module of the second gas.

17. The heat dissipating system of a sealed cabinet according to claim 9, further comprising an alarm for emitting an alarm signal when the first gas leaks.

18. The heat dissipating system of a sealed cabinet of claim 9, wherein a first gas dryer is disposed within the ducting or cabinet proximate the first gas inlet.

Technical Field

The invention relates to the technical field of electric appliances, in particular to a heat dissipation method and system for a sealed cabinet body.

Background

The control cabinet has many kinds, such as variable frequency control cabinet, high-low voltage control cabinet, explosion-proof control cabinet, etc. Be equipped with a large amount of components and parts in the switch board, because components and parts can not work for a long time under high temperature environment, consequently, need dispel the heat to components and parts. In the prior art, air is mostly used as a medium for cooling the control cabinet, but the cooling effect is poor. The method is good in winter, and the influence on components is small because the ambient temperature is low. In case in summer, because ambient temperature is higher, the temperature in the cabinet after components and parts generate heat can continuously rise, and the cooling effect of air is poor in addition, can't reduce the temperature in the cabinet fast to influence the performance of components and parts, lead to the functioning speed of switch board to slow, the phenomenon of crash appears even. Moreover, the service life of the component is easily shortened when the component is in a high-temperature environment for a long time.

Disclosure of Invention

Therefore, it is necessary to provide a heat dissipation method and system for a sealed cabinet body, aiming at the problem that the normal use of components and cabinets is affected due to poor heat dissipation efficiency caused by a cooling mode using air as a medium in the prior art.

A method of dissipating heat from a sealed cabinet, the method comprising: detecting a first gas concentration of air in the cabinet body, wherein the heat conductivity coefficient of the cabinet body is greater than that of the air; when the first gas concentration is smaller than a first preset threshold value, exhausting the air in the cabinet body; and filling the first gas into the cabinet body until the concentration of the first gas is greater than or equal to a first preset threshold value, so that the first gas circularly flows between the cabinet body and the cooling device to dissipate heat.

Wherein the first gas is less dense than air.

Wherein the air in the cabinet body is exhausted by filling the first gas into the cabinet body.

Wherein, the air in the cabinet body is exhausted by charging a second gas which has a density different from that of the first gas and does not react with the first gas into the cabinet body until the concentration of the second gas is greater than or equal to a second preset threshold value; and recovering the second gas during the charging of the first gas

Wherein the second gas is carbon dioxide.

Wherein the first gas is hydrogen or helium.

Wherein, when the first gas leaks, an alarm signal is sent out.

A heat dissipation system of a sealed cabinet body adopts the heat dissipation method of the sealed cabinet body.

Wherein, include: the exhaust device is used for exhausting air in the cabinet body; the first detector is used for detecting the concentration of the first gas in the cabinet body; the pipeline device connects the cooling device and the cabinet body to form a heat dissipation loop for the first gas to flow circularly; a first gas supply means for supplying the first gas; and the controller is used for controlling the first detector and controlling the operation of the exhaust device, the pipeline device and the first gas supply device according to the first gas concentration detected by the first detector.

Wherein the pipe device comprises: and the cooling device, the air inlet and the air outlet of the cabinet body are connected into a pipeline of the heat dissipation loop, and the driving part is used for driving the first gas to circularly flow in the heat dissipation loop.

Wherein the driving part comprises a first exhaust fan arranged at the air inlet and/or a second exhaust fan arranged at the air outlet.

Wherein, the driving part comprises a circulating fan arranged at the bottom of the cabinet body.

The first air supply device is communicated with the cooling device, and the pipeline device comprises a first air inlet valve arranged at the air outlet.

Wherein, first air feeder through first admission valve with the cabinet body intercommunication.

Wherein, still include: the second gas supply device receives the instruction of the controller to supply or recover the second gas; and the second detector receives the instruction of the controller to detect the concentration of the second gas in the cabinet body.

Wherein the second gas supply means comprises: and the second air inlet valve is connected with the cabinet body through the second air inlet valve and is used for releasing or storing the replacement module of the second gas.

Wherein, the gas leakage alarm device also comprises an alarm used for sending out an alarm signal when the first gas leaks.

And a first gas drier is arranged in the pipeline device or the cabinet body and close to the first gas inlet.

According to the heat dissipation method and the heat dissipation system for the sealed cabinet, the first gas concentration is detected to prevent the first gas concentration from meeting the requirement and causing accidents; when the concentration of the first gas is smaller than a first preset threshold value, firstly, discharging the air in the cabinet body to prevent the first gas and the air from being mixed to cause accidents; and then filling the first gas into the cabinet body until the concentration of the first gas is greater than or equal to a first preset threshold value, and finally enabling the first gas to circularly dissipate heat between the cabinet body and the cooling device. Because the heat conductivity coefficient of the first gas is greater than that of the air, the air and the first gas with the same volume can take away more heat, so that the temperature in the cabinet body is quickly reduced, and the components in the cabinet body work in a proper temperature environment. Therefore, the stability of the components can be ensured, and the cabinet can normally operate; and the service life of the components can be ensured.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural view of a heat dissipation system for a sealed cabinet according to an embodiment of the present invention.

Fig. 2 is a schematic flow chart of a heat dissipation method for a sealed cabinet according to an embodiment of the present invention.

Fig. 3 is a schematic overall flow chart of a heat dissipation method for a sealed cabinet according to an embodiment of the present invention.

100. A heat dissipation system of the sealed cabinet body; 1. a cabinet body; 2. an exhaust device; 3. a first detector; 41. A first intake valve; 42. a pipeline; 431. a first exhaust fan; 432. a second exhaust fan; 433. a circulating fan; 5. a first gas supply device; 6. a controller; 7. a second gas supply device; 71. a second intake valve; 8. a second detector; 9. a cooling device; 10. an alarm; 11. a first gas dryer; 12. a touch screen.

Detailed Description

In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Fig. 1 is a schematic structural view of a heat dissipation system for a sealed cabinet according to an embodiment of the present invention.

As can be seen from the figure, the heat dissipation system 100 of the sealed cabinet can have an exhaust device 2, a first detector 3, a pipeline device, a first air supply device 5 and a controller 6, wherein the exhaust device 2 is used for exhausting air in the cabinet 1; the first detector 3 is used for detecting the concentration of the first gas in the cabinet body 1; the pipeline device is used for connecting the cooling device 9 and the cabinet body 1 to form a heat dissipation loop for the first gas to flow circularly; the first gas supply device 5 is communicated with the cooling device 9 and is used for supplying first gas; the controller 6 is configured to control the first detector 3, and control the operation of the exhaust device 2, the pipeline device, and the first air supply device 5 according to the first gas concentration detected by the first detector 3.

The controller 6 is configured to control the first air supply device 5 to charge the first air into the cabinet 1, and control the pipeline device to operate when the first air concentration detected by the first detector 3 is greater than or equal to a first preset threshold value.

In the embodiment, the first detector 3 is used for detecting the first gas concentration so as to prevent the first gas concentration from meeting the requirement and causing accidents; when the first gas concentration detected by the first detector 3 is smaller than a first preset threshold value, firstly, the air in the cabinet body 1 is discharged to prevent the first gas and the air from being mixed to cause an accident; and then filling the first gas into the cabinet body 1 until the concentration of the first gas is greater than or equal to a first preset threshold value, and finally enabling the first gas to circularly dissipate heat between the cabinet body 1 and the cooling device 9. Because the thermal conductivity of the first gas is greater than that of air, the air and the first gas with the same volume can take away more heat, so that the temperature in the cabinet body 1 is rapidly reduced, and the components in the cabinet body 1 work in a proper temperature environment. Therefore, the stability of the components can be ensured, and the cabinet can normally operate; and the service life of the components can be ensured.

In this embodiment, whether the first gas concentration is greater than or equal to the first preset threshold value is detected by the first detector 3 for three consecutive times, so that the safety of the cabinet is ensured.

In prior art, because adopt radiator fan and use the air to dispel the heat as the medium, it is internal that outside air gets into the cabinet easily, leads to the dust to pile up on components and parts to influence the heat dissipation of components and parts. Because radiator fan needs circulate with outside air, consequently, outside moisture gets into the cabinet internally through radiator fan easily, leads to the protection level of the cabinet body to be low.

In this embodiment, because need not circulate with outside air, whole cabinet body 1 adopts sealed structure, and outside dust and moisture can't get into cabinet body 1 in, consequently for components and parts are in work under the environment of safety, thereby have improved the reliability of rack.

How to exhaust the air in the cabinet 1 is described in three ways as follows:

firstly, in this embodiment, the heat dissipation system 100 of the sealed cabinet may have a second air supply device 7 and a second detector 8, where the second air supply device 7 is used to fill or recover a second gas, which has a density different from that of the first gas and does not react with the first gas, into the cabinet 1; the second detector 8 is disposed in the cabinet 1 for detecting a second gas concentration.

Specifically, the controller 6 is configured to control the second air supply device 7 to fill the second air into the cabinet 1 and open the exhaust device 2 to exhaust the air in the cabinet 1 from the exhaust device 2 when the concentration of the first air detected by the first detector 3 is less than a first preset threshold; when the concentration of the second gas detected by the second detector 8 is greater than or equal to a second preset threshold value, the first gas supply device 5 is controlled to fill the first gas into the cabinet body 1, and the exhaust device 2 is closed, so that the second gas in the cabinet body 1 is recovered into the second gas supply device 7. Through recycle second gas to improve the gaseous utilization ratio of second, not only the cost is reduced, environmental protection more moreover.

More specifically, the second air supply device 7 is communicated with the cabinet 1 at a position close to the bottom of the cabinet 1, the exhaust device 2 is communicated with the cabinet 1 at a position close to the top of the cabinet 1, and the second air charged by the second air supply device 7 enters from the bottom of the cabinet 1 and is forced to be exhausted from the exhaust device 2 at the top of the cabinet 1.

Secondly, in one embodiment, the air inside the cabinet 1 may be exhausted directly by charging the first gas that does not react with the air.

In a third way, in an embodiment, the heat dissipation system 100 of the sealed cabinet may have a vacuum machine and a vacuum degree detector, the vacuum machine is communicated with the cabinet 1, the vacuum degree detector is disposed in the cabinet, and the controller 6 is configured to control the vacuum machine to pump out air in the cabinet 1, and control the vacuum machine to stop working and control the first air supply device 5 to generate the first air when the vacuum degree detected by the vacuum degree detector is greater than a preset vacuum degree.

In this embodiment, the first air supply means 5 communicates with the cooling means 9, and the line means comprises a first air inlet valve 41 arranged at the air outlet. The first gas supplied from the first gas supply means 5 is cooled in advance by the cooling means 9, thereby improving the heat radiation efficiency. When the concentration of the second gas detected by the second detector 8 is greater than or equal to a second preset threshold, the controller 6 is configured to open the first air inlet valve 41, so that the first gas is filled into the cabinet 1.

In one embodiment, the first air supply device 5 communicates with the cabinet 1 through the first air intake valve 41.

In the present embodiment, the pipeline device includes a pipeline 42 connecting the cooling device 9 and the air inlet and the air outlet of the cabinet 1 to form a heat dissipation loop, and a driving component for driving the first gas to circularly flow in the heat dissipation loop.

In the present embodiment, the driving part includes a first exhaust fan 431 and/or a second exhaust fan 432 disposed in the cabinet 1, the first exhaust fan 431 blows air from the cabinet 1 to the cooling device 9, the second exhaust fan 432 blows air from the cooling device 9 to the cabinet 1, and the controller 6 is configured to control the first exhaust fan 431 and/or the second exhaust fan 432 to rotate so as to circulate the first gas in the heat dissipation loop. The first exhaust fan 431 and/or the second exhaust fan 432 can increase the circulation flow speed of the first gas, thereby improving the heat dissipation efficiency.

In this embodiment, the driving part includes a circulating fan 433 disposed at the bottom of the cabinet 1, and the controller 6 is configured to control the circulating fan 433 to rotate, so that the first gas circularly flows in the cabinet 1, and thus the heat dissipation inside the cabinet 1 is uniform.

In the present embodiment, the second gas supply device 7 includes a second gas inlet valve 71, and a replacement module connected to the cabinet 1 through the second gas inlet valve 71 for releasing or storing the second gas. When the first gas concentration detected by the first detector 3 is less than a first preset threshold, the controller 6 is configured to open the second gas inlet valve 71, so that the second gas is filled into the cabinet 1; the controller 6 is configured to close the second air intake valve 71 when the first gas concentration detected by the first detector 3 is greater than or equal to a first preset threshold.

In the embodiment, the density of the first gas is lower than that of air, so that the resistance of the first gas in the flowing process is reduced, and the heat dissipation efficiency is improved.

In this embodiment, the first gas is hydrogen, and the first predetermined threshold is 96%. Since the density of hydrogen gas is only 1/14 of air, the resistance in the flowing process can be greatly reduced, and the heat dissipation efficiency is greatly improved. Because the coefficient of heat conductivity of hydrogen is about 6.7 times of air, consequently, under the same volume, more heats can be taken away to hydrogen to reduce the temperature of the interior components and parts of cabinet 1 fast. Because hydrogen is not combustion-supporting, when the components and parts in the cabinet body 1 are subjected to insulation breakdown, the occurrence of fire can be avoided, and therefore the safety of a heat dissipation system is improved. The hydrogen does not play a role in oxidation, so that the service life of the component can be prolonged.

In one embodiment, the first gas may also be helium.

In this embodiment, the second gas is carbon dioxide and the second predetermined threshold is 85%. The carbon dioxide is filled into the cabinet body 1, and because the density of the carbon dioxide is greater than that of the air, the carbon dioxide enters from the bottom of the cabinet body 1 and is accumulated continuously, so that the air is forced to be exhausted from the exhaust device 2 at the top of the cabinet body 1, the air in the cabinet body 1 can be completely exhausted through the carbon dioxide, the hydrogen and the air are prevented from being mixed to explode, and the safety of a heat dissipation system is improved.

In this embodiment, the cabinet 1 is provided with an alarm 10, and the alarm 10 is configured to send an alarm signal when the first gas leaks. The first gas in the cabinet body 1 is monitored in real time through the alarm 10, and once the first gas leaks, a user is timely reminded to process, and the safety of a heat dissipation system is improved.

In this embodiment, be equipped with first gas desicator 11 in the cabinet body 1, moisture content in first gas can be detached to first gas desicator 11 to prevent that components and parts from weing, guarantee the life of components and parts.

In this embodiment, the first gas supply device 5 is a hydrogen generator by electrolyzing water.

In this embodiment, the cabinet 1 is provided with a touch screen 12, and the operation of the user can be facilitated through the touch screen 12.

In one embodiment, as shown in fig. 2, a method for dissipating heat from a sealed cabinet is provided, which specifically includes the following steps:

s102, detecting a first gas concentration of which the heat conductivity coefficient is larger than that of air in the cabinet body 1.

Specifically, a first gas concentration in the cabinet 1 is detected by the first detector 3.

And S104, when the first gas concentration is smaller than a first preset threshold value, exhausting the air in the cabinet body 1.

Specifically, when the first gas concentration detected by the first detector 3 is less than a first preset threshold, the air in the cabinet 1 is exhausted through the exhaust device 2.

In one embodiment, the air may be exhausted by the first gas.

In one embodiment, air may also be vented by the second gas.

In one embodiment, the air may also be evacuated by a vacuum.

And S106, filling the first gas into the cabinet body 1 until the concentration of the first gas is greater than or equal to a first preset threshold value, and enabling the first gas to circularly flow between the cabinet body 1 and the cooling device 9 for heat dissipation.

Specifically, the controller 6 controls the first air supply device 5 to charge the first air into the cabinet 1, and when the concentration of the first air detected by the first detector 3 is greater than or equal to a first preset threshold, the controller 6 enables the first air to circularly flow between the cabinet 1 and the cooling device 9 through the pipeline device to dissipate heat.

In this embodiment, the method further includes exhausting air in the cabinet 1 by filling a second gas, which has a density different from that of the first gas and does not react with the first gas, into the cabinet until a concentration of the second gas is greater than or equal to a second preset threshold; and the second gas is recovered during the charging of the first gas.

In this embodiment, the method further comprises issuing an alarm signal when the first gas leaks.

To better understand the above embodiments, the following provides an overall flow of the heat dissipation method for the sealed cabinet, as shown in fig. 3:

the first step is as follows: the first gas concentration in the cabinet 1 is detected.

In this embodiment, the first gas is hydrogen.

The second step is that: judging whether the first gas concentration in the cabinet body 1 is greater than or equal to 96%, and if the first gas concentration is less than 96%, entering a third step; otherwise, the ninth step is entered.

The third step: the exhaust means 2 is opened.

In the present embodiment, the exhaust device 2 is an exhaust valve.

The fourth step: the second gas in the second gas supply device 7 is charged into the cabinet 1.

In this embodiment, the second gas is carbon dioxide.

The fifth step: and judging whether the concentration of the second gas in the cabinet body 1 is greater than or equal to 85%, if so, entering the sixth step, and otherwise, entering the fourth step.

And a sixth step: the exhaust means 2 is closed.

The seventh step: the first gas in the first gas supply device 5 is charged into the cabinet 1.

Eighth step: judging whether the concentration of the first gas in the cabinet body 1 is greater than or equal to 96%, and entering the ninth step if the concentration of the first gas is greater than or equal to 96%; otherwise, go to the seventh step.

The ninth step: the pipeline device is started to circulate the first gas between the cabinet body 1 and the cooling device 9 for heat dissipation.

In view of the above description of the heat dissipation method and system for a sealed cabinet provided by the present invention, those skilled in the art will recognize that there may be variations in the embodiments and applications of the concepts according to the embodiments of the present invention.