CN110785067A - Closed space phase change heat dissipation device and closed space phase change heat dissipation method - Google Patents
Closed space phase change heat dissipation device and closed space phase change heat dissipation method Download PDFInfo
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- CN110785067A CN110785067A CN201911095088.9A CN201911095088A CN110785067A CN 110785067 A CN110785067 A CN 110785067A CN 201911095088 A CN201911095088 A CN 201911095088A CN 110785067 A CN110785067 A CN 110785067A
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2029—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant with phase change in electronic enclosures
- H05K7/20336—Heat pipes, e.g. wicks or capillary pumps
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/06—Hermetically-sealed casings
- H05K5/066—Hermetically-sealed casings sealed by fusion of the joining parts without bringing material; sealed by brazing
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/06—Hermetically-sealed casings
- H05K5/069—Other details of the casing, e.g. wall structure, passage for a connector, a cable, a shaft
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
- H05K7/20136—Forced ventilation, e.g. by fans
- H05K7/20172—Fan mounting or fan specifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0007—Casings
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- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
The invention relates to a closed space phase change heat dissipation device and a closed space phase change heat dissipation method, belongs to the field of closed space heat dissipation, and solves the problems of low heat dissipation efficiency and poor closing performance of a closed space in the prior art. The invention comprises the following steps: an upper shell, a lower shell and a clapboard; the upper shell and the partition plate form an upper heat dissipation cabin, and the lower shell and the partition plate form a lower heat dissipation cabin; a first heat pipe radiator is arranged in the upper heat dissipation cabin, and a second heat pipe radiator is arranged in the lower heat dissipation cabin; the upper parts of the first and second heat pipe radiators are communicated through a first refrigerant pipeline, and the lower parts of the first and second heat pipe radiators are communicated through a second refrigerant pipeline; the refrigerant is arranged in the heat pipe radiator, is vaporized by being heated, floats upwards, enters the first heat pipe radiator, is liquefied and flows back to the second heat pipe radiator after heat is radiated to the external environment, and is circularly radiated, and the fans are arranged in the upper heat radiating cabin and the lower heat radiating cabin to accelerate air flow. The invention realizes the high-efficiency heat dissipation of the high-closed space and the functions of water resistance, dust resistance and electromagnetic shielding.
Description
Technical Field
The invention relates to the technical field of space heat dissipation, in particular to a closed space phase change heat dissipation device and a closed space phase change heat dissipation method.
Background
At present, the heat dissipation mode for macro heating equipment such as a case, a cabinet and the like in a closed space mainly comprises the following steps: active ventilation and heat dissipation and a passive heat dissipation mode of arranging heat dissipation fins.
Active ventilation's radiating mode treats the outer new trend in heat dissipation space through introducing, through the mode of heat convection, outside the heat that the equipment that will generate heat brought out the space through the air, this mode radiating efficiency and reliability are high, have important application in the heat dissipation field of quick-witted case, rack, but this mode is not suitable for the airtight space heat dissipation problem of the following: 1) a closed space with high requirements on water resistance and dust resistance; 2) a closed space having a requirement for electromagnetic shielding performance; 3) the space to be radiated has other special requirements, which leads to the condition of needing good sealing performance.
The passive heat dissipation mode of the heat dissipation fins is arranged, the defects of active ventilation and heat dissipation are avoided, the airtightness of a space to be dissipated is not damaged, and the performances of dust prevention, rain prevention, electromagnetic shielding and the like are ensured. However, heat generated by heating devices such as the cabinet needs to be firstly transferred to the surface of the cabinet, then to the radiating fins through the wall surface of the closed space, and finally to be dissipated through heat convection between the radiating fins and air, so that the whole heat transfer process has many links, long path and large thermal resistance, and therefore, the heat dissipation efficiency is low, and the requirement of high-efficiency heat dissipation cannot be met.
Therefore, it is necessary to provide a new heat dissipation method to solve the problem of efficient heat dissipation in a sealed space with high requirements for water resistance, dust resistance and electromagnetic shielding.
Disclosure of Invention
In view of the above analysis, the present invention aims to provide a closed space phase-change heat dissipation device and a closed space phase-change heat dissipation method, so as to solve the problems that the existing active ventilation heat dissipation is not suitable for a closed space with high requirements on waterproof, dustproof and electromagnetic shielding performances, and the whole heat transfer process of a passive heat dissipation method with heat dissipation fins is multi-link, long in path and large in thermal resistance, resulting in low heat dissipation efficiency and failing to meet the high-efficiency heat dissipation requirement, and provide a high-efficiency heat dissipation device with high requirements on waterproof, dustproof and electromagnetic shielding for a high-closed space.
The purpose of the invention is mainly realized by the following technical scheme:
a closed space phase-change heat dissipation device comprises: the heat pipe radiator comprises an upper shell, a lower shell, a partition plate, a first heat pipe radiator and a second heat pipe radiator; the upper shell and the partition plate form an upper heat dissipation cabin, and the lower shell and the partition plate form a lower heat dissipation cabin; the first heat pipe radiator is arranged in the upper heat dissipation cabin, and the second heat pipe radiator is arranged in the lower heat dissipation cabin; the upper part of the first heat pipe radiator is communicated with the upper part of the second heat pipe radiator through a first refrigerant pipeline, and the lower part of the first heat pipe radiator is communicated with the lower part of the second heat pipe radiator through a second refrigerant pipeline; the second heat pipe radiator is provided with a refrigerant capable of changing phase along with the temperature.
Specifically, pipeline sealing sieves are arranged among the first refrigerant pipeline, the second refrigerant pipeline and the partition plate for sealing.
Specifically, a first axial flow fan is further arranged in the upper heat dissipation cabin, and a second axial flow fan is further arranged in the lower heat dissipation cabin.
Specifically, a first grid is arranged on the upper shell, and a second grid and a third grid are arranged on the lower shell.
Specifically, the upper heat dissipation compartment is communicated with the external environment through a first grid, and the lower heat dissipation compartment is communicated with the internal working space through a second grid and a third grid.
Specifically, a top plate of the upper shell is provided with a fan mounting hole, and the first axial flow fan is mounted in the fan mounting hole and fixedly connected with the top plate; and the second axial flow fan is fixedly installed with the side panel of the lower shell, and the wind direction of the second axial flow fan faces to the third grid direction.
Specifically, an electrical connector for connecting a power supply is provided on the lower case.
Specifically, a switching connector is arranged on the partition plate, a connector sealing screen is arranged between the switching connector and the partition plate, and the first axial flow fan is connected with the electric connector through the switching connector and a cable.
Specifically, the heat dissipation device is hermetically connected with the wall plate of the closed space; the partition is used for sealing the closed space.
A heat dissipation method of a phase change heat dissipation device in a closed space comprises three heat dissipation cycles: the heat dissipation device comprises a first convection heat dissipation cycle, a phase change heat dissipation cycle and a second convection heat dissipation cycle, wherein the first convection heat dissipation cycle, the phase change heat dissipation cycle and the second convection heat dissipation cycle are carried out simultaneously.
The first convection heat dissipation cycle is: air is supplied by a second axial flow fan to realize the air circulation flow in the lower radiating cabin and the internal working space;
the second convection heat dissipation cycle is as follows: the air circulation flow between the upper radiating cabin and the external environment is realized by the air supply of the first axial flow fan;
the phase change heat dissipation cycle is as follows: the refrigerant in the second heat pipe radiator is heated and gasified, the gasified refrigerant steam floats upwards to the first heat pipe radiator, the refrigerant steam is liquefied when meeting cold in the upper heat radiating cabin, and the liquefied refrigerant flows back to the second heat pipe radiator under the action of gravity.
The invention has the following beneficial effects:
1. good sealing performance.
The heat dissipation device is hermetically installed on the wall plate of the internal working space, the upper heat dissipation cabin and the lower heat dissipation cabin are separated by the partition plate, the lower heat dissipation cabin exchanges heat with the internal working space, the partition plate is fixedly welded with the shell of the heat dissipation device, the sealing performance is good, rainwater, dust and impurities in air and the like can be prevented from entering the internal working space, the good sealing performance of the working space to be dissipated is guaranteed, and the rainproof and dustproof performances of the working space are guaranteed.
The shell of the heat dissipation device is made of metal, and the partition plate is also made of metal, so that good electromagnetic shielding performance can be realized.
2. Phase change heat dissipation improves the radiating efficiency.
A first heat pipe radiator is arranged in an upper heat dissipation cabin, a second heat pipe radiator is arranged in a lower heat dissipation cabin, the lower heat dissipation cabin is communicated with an internal working space, and a cold medium in the second heat pipe radiator absorbs heat of the internal working space to generate phase change heat absorption; refrigerant steam floats upwards and reaches a first heat pipe radiator in the upper heat dissipation cabin through a first refrigerant pipeline, the refrigerant in the first heat pipe radiator flows and is cooled through air in the upper heat dissipation cabin, the gas phase is changed into the liquid phase, heat is released, and the heat is dissipated to the external environment through the air flowing in the upper heat dissipation cabin; the liquefied refrigerant flows through the second refrigerant pipeline under the action of gravity and returns to the second heat pipe radiator of the lower heat dissipation cabin again to complete a phase change heat dissipation cycle.
The heat dissipation device of the invention continuously changes the gas phase and liquid phase states through the refrigerant, brings the heat to the heat dissipation cabin, and finally dissipates the heat to the external environment along with the airflow, thereby realizing the rapid cooling of the internal working space.
3. Convection circulation heat dissipation accelerates air circulation and improves heat dissipation efficiency.
The invention arranges a first axial fan in an upper heat dissipation cabin, arranges a second axial fan in a lower heat dissipation cabin, the upper heat dissipation cabin is communicated with the external environment, and the lower heat dissipation cabin is communicated with the internal working space. When the heating equipment in the internal working space works, firstly, the second axial flow fan accelerates the air flow between the lower heat dissipation cabin and the internal working space, promotes the heat exchange between the lower heat dissipation cabin and the internal working space, and realizes convection heat dissipation circulation. The refrigerant in the second heat pipe radiator is heated and gasified, and the gaseous refrigerant flows into the upper heat dissipation cabin to bring the heat to the upper heat dissipation cabin. The first axial fan of the upper radiating cabin promotes the air circulation of the upper radiating cabin, accelerates the heat exchange with the external environment and realizes convection radiating circulation. The invention radiates heat to the external environment through two times of convection circulation, and the two axial flow fans promote the gas circulation, accelerate the heat exchange process and improve the heat radiation efficiency.
4. Convenient installation and wide application range.
The heat dissipation device is of a box-shaped structure, is fixedly connected with the wall surface of the closed space of the working space, and has sealed edges, so that the sealing property of the internal working space in the heat dissipation process is ensured.
In the invention, the technical schemes can be combined with each other to realize more preferable combination schemes. Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, wherein like reference numerals are used to designate like parts throughout.
FIG. 1 is a perspective view of a closed space phase change heat dissipation device of the present invention;
FIG. 2 is a rear view of the closed space phase change heat sink of the present invention;
FIG. 3 is a right side view of the enclosed space phase change heat sink of the present invention;
FIG. 4 is a front view of the closed space phase change heat sink of the present invention;
FIG. 5 is a left side view of the closed space phase change heat dissipating device of the present invention;
FIG. 6 is a cross-sectional view of the enclosed space phase change heat sink of the present invention taken along the direction A-A;
fig. 7 is an installation diagram of the phase change heat dissipation device in a closed space according to the present invention.
Reference numerals:
1-an upper shell; 1-1-a first grid; 2-a lower shell; 2-1-a second grid; 2-2-third grid; 3-a first mounting plate; 4-a second mounting plate; 5-a separator; 6-1-a first heat pipe radiator; 6-2-a second heat pipe radiator; 7-1-a first refrigerant pipeline; 7-2-a second refrigerant pipeline; 8-pipeline sealing sieve; 9-1-a first axial fan; 9-2-second axial flow fan; 10-connector sealing screen; 11-an electrical connector; 12-a switch-over connector; 13-a closed space wall; 14-heat generating device.
Detailed Description
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate preferred embodiments of the invention and together with the description, serve to explain the principles of the invention and not to limit the scope of the invention.
Example one
The invention discloses a phase change heat dissipation device for a closed space, which comprises: the air conditioner comprises an upper shell 1, a lower shell 2, a partition plate 5, a first heat pipe radiator 6-1, a second heat pipe radiator 6-2, a first refrigerant pipeline 7-1, a second refrigerant pipeline 7-2, a first axial flow fan 9-1 and a second axial flow fan 9-2.
Specifically, the phase change heat dissipation device of the present embodiment is a box structure, and includes an upper housing 1 and a lower housing 2; the upper case 1 includes: a top panel (top plate) and four side panels in four directions of front, back, left and right. The lower case 2 includes: a bottom plate and four side panels in four directions of front, back, left and right.
Further, the upper shell 1 and the lower shell 2 mainly play a role in supporting and fixing, and are simultaneously separated from the heat dissipation device into an upper heat dissipation cabin and a lower heat dissipation cabin which are independent cabin bodies together with the partition plate 5. That is to say, set up baffle 5 between last casing 1 and the casing 2 down, go up through welded fastening between casing 1 and the baffle 5, also through welded fastening between casing 2 and the baffle 5 down, go up casing 1 and baffle 5 and constitute phase change heat abstractor's last heat dissipation cabin, casing 2 and baffle 5 constitute phase change heat abstractor's lower heat dissipation cabin down.
Specifically, the shell of the phase change heat dissipation device is hermetically connected with the wall surface 13 of the closed space, the lower heat dissipation cabin of the phase change heat dissipation device is communicated with the internal working space, and the upper heat dissipation cabin is communicated with the external environment.
Specifically, a first heat pipe radiator 6-1 is arranged in the upper heat dissipation chamber, and a second heat pipe radiator 6-2 is arranged in the lower heat dissipation chamber. The first heat pipe radiator 6-1 is fixedly installed through the first installation plate 3, the first installation plate 3 is fixedly installed on the upper shell 1 or the partition plate 5 through welding or bolt connection, and the first heat pipe radiator 6-1 is installed on the first installation plate 3 through welding or bolt connection. The second heat pipe radiator 6-2 is fixedly installed through a second installation plate 4, the second installation plate 4 is fixedly installed on the lower shell 2 or the partition plate 5 through welding or bolt connection, and the second heat pipe radiator 6-2 is installed on the second installation plate 4 through welding or bolt connection.
In particular, in order to achieve as fast a dissipation of the heat in the inner working space into the external environment as possible, it is necessary to transfer the heat from the lower heat dissipation compartment to the upper heat dissipation compartment. Therefore, the second heatpipe heat sink 6-2 of the phase change heat sink is pre-filled with a certain amount of refrigerant (distilled water, ethylene glycol, etc.).
Specifically, the first heatpipe radiator 6-1 exchanges heat with air in the upper heat-radiating chamber by surface contact, and the second heatpipe radiator 6-2 exchanges heat with air in the lower heat-radiating chamber by surface contact.
The refrigerant in the second heat pipe radiator 6-2 is heated and vaporized to absorb the heat of the internal working space, the refrigerant vapor floats upwards, reaches the first heat pipe radiator 6-1 of the upper heat dissipation cabin through the first refrigerant pipeline 7-1, and is cooled by the air flow of the upper heat dissipation cabin, the gaseous refrigerant in the first heat pipe radiator 6-1 is changed into a liquid phase from a gas phase, the heat is released, the heat released by the refrigerant liquefaction is dissipated to the external environment outside the closed space through the flowing air of the upper heat dissipation cabin, and the phase change heat dissipation of the internal working space is realized.
The refrigerant in the first heat pipe radiator 6-1 is liquefied after releasing heat, the liquefied refrigerant flows back to the second heat pipe radiator 6-2 under the action of gravity to perform the next phase change heat dissipation cycle, and the heat generated by the heating equipment 14 in the internal working space is timely transferred to the external environment to be dissipated through the conversion from the gas phase to the liquid phase of the refrigerant, so that the damage to the heating equipment and even the fire caused by the overhigh temperature of the internal working space are avoided.
Furthermore, the upper end of the first heat pipe radiator 6-1 is communicated with the upper end of the second heat pipe radiator 6-2 through a first refrigerant pipeline 7-1, and the lower end of the first heat pipe radiator 6-1 is communicated with the lower end of the second heat pipe radiator 6-2 through a second refrigerant pipeline 7-2.
The first refrigerant pipeline 7-1 and the second refrigerant pipeline 7-2 both penetrate through the partition plate 5 to be communicated with the first heat pipe radiator 6-1 and the second heat pipe radiator 6-2, the number of the first refrigerant pipelines 7-1 can be one or more, and similarly, the number of the second refrigerant pipelines 7-2 can also be one or more. The first refrigerant pipeline 7-1, the second refrigerant pipeline 7-2 and the partition plate 5 are sealed through pipeline sealing plugs 8, and the sealing effect of the partition plate 5 on the internal working space is guaranteed.
Further, in order to accelerate the heat exchange between the phase change heat dissipation device and the internal working space and dissipate heat to the external environment as soon as possible, a first axial fan 9-1 is arranged in the upper heat dissipation cabin, and a second axial fan 9-2 is arranged in the lower heat dissipation cabin. Specifically, the first axial fan 9-1 is fixedly connected with the upper shell 1 in a welding or bolt connection mode, and the second axial fan 9-2 is fixedly connected with the lower shell 2 in a welding or bolt connection mode.
Specifically, fig. 2-4 are rear, right, and front views, respectively, of fig. 1. As shown in fig. 1, 3 and 4, a second grid 2-1 and a third grid 2-2 are arranged on the lower shell 2, the second grid 2-1 and the third grid 2-2 are respectively arranged on two adjacent side panels, the second grid 2-1 can also be arranged on the bottom plate of the lower shell 2, and the second grid 2-1 and the third grid 2-2 are used for communicating the lower heat dissipation cabin with the internal working space.
Specifically, a top plate of the upper shell 1 is provided with a fan mounting hole, and the first axial fan 9-1 is mounted in the fan mounting hole and fixedly connected with the top plate in a welding or bolt connection mode. The second axial fan 9-2 is fixedly connected with the lower shell 2 in a welding or bolt connection mode, and the wind direction of the second axial fan 9-2 faces the direction of the third grid 2-2.
When the second axial fan 9-2 works, hot air in the inner working space flows into the lower heat dissipation cabin from the second grid 2-1 and flows out of the lower heat dissipation cabin from the third grid 2-2 to form convection, so that the lower heat dissipation cabin and air in the inner working space circulate, and heat in the inner working space is brought into the lower heat dissipation cabin. The second axial fan 9-2 accelerates the air flow between the inner working space and the lower heat dissipation cabin, and further accelerates the heat dissipation efficiency of the heat dissipation device.
Specifically, fig. 5 is a left side view of fig. 1, a first grid 1-1 is disposed on a side panel of the upper housing 1, and the first grid 1-1 connects the upper heat dissipation compartment with the external environment. Further, the top of the upper casing 1 is perforated, and the first axial fan 9-1 is installed at the perforated position, as shown in fig. 1 and 6.
When the first axial fan 9-1 works, air in the external environment flows into the upper heat dissipation cabin from the first grid 1-1 and flows out of the upper heat dissipation cabin from the first axial fan 9-1 to form convection, and heat in the upper heat dissipation cabin is brought to the external environment. The first axial fan 9-1 accelerates the flow of air in the external environment and the upper heat dissipation cabin, and further accelerates the heat dissipation efficiency of the heat dissipation device.
Specifically, in order to realize power supply to the first axial flow fan 9-1 and the second axial flow fan 9-2, an electric connector is arranged on a shell of the phase change heat dissipation device to be connected with a power supply, the phase change heat dissipation device can share the power supply with heating equipment and can also be connected with an external power supply, and the specific arrangement position of the electric connector is selected according to the mode of connecting the power supply. As shown in fig. 1 and 4, an electrical connector 11 is disposed on the lower housing 2, and the outer side of the electrical connector 11 is connected to a power supply and the inner side is connected to a wire for supplying power to the first axial fan 9-1 and the second axial fan 9-2.
Specifically, when the electric connector 11 supplies power to the first axial fan 9-1, the electric wire needs to pass through the partition plate 5, in order to ensure the sealing performance of the partition plate 5, the adapter connector 12 is arranged on the partition plate 5, and the connector sealing screen 10 is arranged between the adapter connector 12 and the partition plate 5 to seal the partition plate 5. Both ends of the adaptor connector 12 are connected to the first axial fan 9-1 of the upper heat dissipating compartment and the electrical connector 11 of the lower housing 2 by wires, respectively, as shown in fig. 6 and 7.
The invention belongs to the technical field of efficient heat dissipation and heat management, and particularly relates to a phase change heat dissipation device for heat dissipation of equipment in a closed space. The invention is mainly applied to the field of heat dissipation of macroscopic heating equipment such as cabinets, chassis and the like in a closed space.
When the heat dissipation device is implemented, the heat dissipation device and the internal working space are hermetically installed in a welding or bonding mode, the upper heat dissipation cabin and the lower heat dissipation cabin are separated by the partition plate 5, the lower heat dissipation cabin performs heat exchange with the internal working space, and the upper heat dissipation cabin performs heat exchange with the external environment. The partition plate is fixed with the shell of the heat dissipation device through welding, the sealing performance is good, dust and impurities in rainwater and air can be prevented from entering the internal working space, the good sealing performance of the working space to be dissipated is guaranteed, and the rainproof performance, the dustproof performance and the electromagnetic shielding performance of the heat dissipation device are guaranteed.
Example two
The upper heat dissipation cabin of the phase change heat dissipation device is communicated with the external environment, and the lower heat dissipation cabin is communicated with the internal working space.
The phase change heat dissipation method for the enclosed space of the embodiment adopts the phase change heat dissipation device for the enclosed space of the first embodiment, and comprises three heat dissipation cycles: the heat dissipation device comprises a first convection heat dissipation cycle, a phase change heat dissipation cycle and a second convection heat dissipation cycle, wherein the first convection heat dissipation cycle, the phase change heat dissipation cycle and the second convection heat dissipation cycle are carried out simultaneously.
The first convection heat dissipation cycle is: air is supplied by a second axial flow fan 9-2 to realize the air circulation flow in the lower radiating cabin and the inner working space;
the second convection heat dissipation cycle is as follows: air is supplied by the first axial flow fan 9-1 to realize air circulation flow between the upper radiating cabin and the external environment;
the phase change heat dissipation cycle is as follows: the refrigerant in the second heat pipe radiator 6-2 is gasified by heating, the gasified refrigerant vapor floats upwards to the first heat pipe radiator 6-1, the refrigerant vapor is liquefied when meeting cold in the upper heat dissipation cabin, and the liquefied refrigerant flows back to the second heat pipe radiator 6-2 under the action of gravity.
The specific process is as follows:
when the heating device 14 in the internal working space works, firstly, when the second axial fan 9-2 works, hot air in the internal working space flows into the lower heat dissipation cabin from the second grid 2-1 and flows out of the lower heat dissipation cabin from the third grid 2-2 to form convection, so that the lower heat dissipation cabin and air in the internal working space circulate, and heat in the internal working space is brought into the lower heat dissipation cabin.
The second axial fan 9-2 accelerates the air flow between the lower heat dissipation cabin and the internal working space, and promotes the heat exchange between the lower heat dissipation cabin and the internal working space. The cold medium in the second heat pipe radiator 6-2 absorbs the heat of the inner working space to be vaporized, the liquid state is changed into the gas state, and the phase change heat absorption is carried out.
The refrigerant in the second heat pipe radiator 6-2 is heated and gasified, the refrigerant steam floats upwards, and the gaseous refrigerant flows into the first heat pipe radiator 6-1 of the upper heat dissipation cabin through the first refrigerant pipeline 7-1 to bring the heat to the upper heat dissipation cabin.
The first axial fan 9-1 of the upper heat dissipation cabin promotes air circulation between the upper heat dissipation cabin and the external environment, and heat exchange with the external environment is accelerated. The refrigerant in the first heat pipe radiator 6-1 is cooled by air flowing through the upper heat dissipation cabin, the gas phase is changed into the liquid phase, heat is released, and the heat is dissipated to the external environment through the air flowing through the upper heat dissipation cabin.
The liquefied coolant flows through the second coolant pipeline 7-2 from the first heat pipe radiator 6-1 under the action of gravity, and returns to the second heat pipe radiator 6-2 of the lower heat dissipation cabin again, so that a phase change heat dissipation cycle is completed.
When the first axial fan 9-1 works, air in the external environment flows into the upper heat dissipation cabin from the first grid 1-1 and flows out of the upper heat dissipation cabin from the first axial fan 9-1 to form convection, heat in the upper heat dissipation cabin is brought into the external environment, heat exchange between the upper heat dissipation cabin and the external environment is accelerated, and the temperature of the upper heat dissipation cabin is reduced.
Compared with the prior art, the technical scheme provided by the embodiment has at least one of the following technical effects:
1. the heat dissipation device of the invention continuously changes the gas phase and liquid phase states through the refrigerant, brings the heat to the heat dissipation cabin, and finally dissipates the heat to the external environment along with the airflow, thereby realizing the rapid cooling of the internal working space.
2. The invention radiates heat to the external environment through two times of convection circulation, and the two axial flow fans promote the gas circulation, accelerate the heat exchange process and improve the heat radiation efficiency.
3. The invention improves the heat dissipation efficiency by combining the phase change heat dissipation and the convection heat dissipation.
4. The internal working space is separated from the external environment through the partition plate 5 and the device shell, the sealing performance is good, rainwater, dust and impurities in air and the like can be prevented from entering the internal working space, the good sealing performance of the working space to be radiated is ensured, and the rainproof and dustproof performances of the working space to be radiated are ensured.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Claims (10)
1. The utility model provides a confined space phase transition heat abstractor which characterized in that includes: the heat pipe radiator comprises an upper shell (1), a lower shell (2), a partition plate (5), a first heat pipe radiator (6-1) and a second heat pipe radiator (6-2); the upper shell (1) and the partition plate (5) form an upper heat dissipation cabin, and the lower shell (2) and the partition plate (5) form a lower heat dissipation cabin; the first heat pipe radiator (6-1) is arranged in the upper heat dissipation cabin, and the second heat pipe radiator (6-2) is arranged in the lower heat dissipation cabin; the upper part of the first heat pipe radiator (6-1) is communicated with the upper part of the second heat pipe radiator (6-2) through a first refrigerant pipeline (7-1), and the lower part of the first heat pipe radiator (6-1) is communicated with the lower part of the second heat pipe radiator (6-2) through a second refrigerant pipeline (7-2); and a refrigerant capable of changing phase along with the temperature is arranged in the second heat pipe radiator (6-2).
2. The phase-change heat dissipation device for the enclosed space according to claim 1, wherein a pipeline sealing screen (8) is arranged between the first refrigerant pipeline (7-1), the second refrigerant pipeline (7-2) and the partition plate (5) for sealing.
3. The enclosed space phase-change heat dissipation device as defined in claim 1 or 2, wherein the upper heat dissipation compartment is further provided with a first axial fan (9-1), and the lower heat dissipation compartment is further provided with a second axial fan (9-2).
4. The enclosed space phase-change heat sink according to claim 3, wherein the upper housing (1) is provided with a first grid (1-1), and the lower housing (2) is provided with a second grid (2-1) and a third grid (2-2).
5. The confined space phase change heat sink according to claim 4, wherein the upper heat sink is in communication with the external environment through a first grid (1-1), and the lower heat sink is in communication with the internal working space through a second grid (2-1) and a third grid (2-2).
6. The enclosed space phase-change heat dissipation device as recited in claim 5, wherein a fan mounting hole is provided on a top plate of the upper housing (1), and the first axial fan (9-1) is fixedly connected with the top plate through the fan mounting hole; the second axial flow fan (9-2) is fixedly arranged on a side panel of the lower shell (2), and the wind direction of the second axial flow fan (9-2) faces the third grid (2-2).
7. The phase-change heat sink for enclosed space according to any one of claims 4-6, wherein the lower housing (2) is provided with an electrical connector (11) for connecting to a power supply.
8. The enclosed space phase-change heat dissipation device according to claim 7, wherein a transition connector (12) is disposed on the partition (5), a connector sealing screen (10) is disposed between the transition connector (12) and the partition (5), and the first axial fan (9-1) is connected to the electrical connector (11) through the transition connector (12) and a cable.
9. The enclosed space phase-change heat sink according to claim 8, wherein the heat sink is hermetically connected to the enclosed space wall (13); the partition (5) is used for sealing the closed space.
10. The enclosed space phase change heat dissipation method of the enclosed space phase change heat dissipation device according to any one of claims 1 to 9, wherein heat dissipation is performed by using three heat dissipation cycles: the heat dissipation device comprises a first convection heat dissipation cycle, a phase change heat dissipation cycle and a second convection heat dissipation cycle, wherein the first convection heat dissipation cycle, the phase change heat dissipation cycle and the second convection heat dissipation cycle are carried out simultaneously;
the first convection heat dissipation cycle is as follows: air is supplied by a second axial flow fan (9-2) to realize the air circulation flow in the lower radiating cabin and the internal working space;
the second convection heat dissipation cycle is as follows: air circulation flowing between the upper radiating cabin and the external environment is realized by air supply of a first axial flow fan (9-1);
the phase change heat dissipation cycle is as follows: the refrigerant in the second heat pipe radiator (6-2) is gasified by heating, the gasified refrigerant steam floats upwards to the first heat pipe radiator (6-1), the refrigerant steam is liquefied when meeting cold in the upper heat dissipation chamber, and the liquefied refrigerant flows back to the second heat pipe radiator (6-2) under the action of gravity.
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| CN201911095088.9A CN110785067A (en) | 2019-11-11 | 2019-11-11 | Closed space phase change heat dissipation device and closed space phase change heat dissipation method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114688636A (en) * | 2020-12-30 | 2022-07-01 | 广东美的白色家电技术创新中心有限公司 | Electric control box device, outdoor unit and air conditioner |
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| CN104679175A (en) * | 2015-02-15 | 2015-06-03 | 郑州匠芯电子科技有限公司 | Dustproof radiating machine case |
| CN205124225U (en) * | 2015-10-29 | 2016-03-30 | 阳光电源股份有限公司 | Photovoltaic contravariant rack |
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Application publication date: 20200211 |