CN118299239A - Bulb heat dissipation system - Google Patents
Bulb heat dissipation system Download PDFInfo
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- CN118299239A CN118299239A CN202410719355.XA CN202410719355A CN118299239A CN 118299239 A CN118299239 A CN 118299239A CN 202410719355 A CN202410719355 A CN 202410719355A CN 118299239 A CN118299239 A CN 118299239A
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- 230000017525 heat dissipation Effects 0.000 title claims abstract description 45
- 239000002826 coolant Substances 0.000 claims abstract description 191
- 238000001816 cooling Methods 0.000 claims abstract description 73
- 230000008859 change Effects 0.000 claims abstract description 15
- 239000007788 liquid Substances 0.000 claims description 57
- 239000007787 solid Substances 0.000 claims description 37
- 239000003507 refrigerant Substances 0.000 claims description 24
- 238000009833 condensation Methods 0.000 claims description 13
- 230000005494 condensation Effects 0.000 claims description 13
- 238000010894 electron beam technology Methods 0.000 claims description 11
- 230000006835 compression Effects 0.000 claims description 9
- 238000007906 compression Methods 0.000 claims description 9
- 239000011148 porous material Substances 0.000 claims description 9
- 238000009825 accumulation Methods 0.000 claims description 8
- 238000010298 pulverizing process Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 229910001338 liquidmetal Inorganic materials 0.000 claims description 5
- 239000007769 metal material Substances 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 4
- 230000009977 dual effect Effects 0.000 claims description 4
- 238000007664 blowing Methods 0.000 claims description 3
- 230000000877 morphologic effect Effects 0.000 claims description 2
- 239000012071 phase Substances 0.000 description 13
- 238000000034 method Methods 0.000 description 10
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- 238000010586 diagram Methods 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 5
- 125000004122 cyclic group Chemical group 0.000 description 4
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- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000000110 cooling liquid Substances 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 1
- 229910001182 Mo alloy Inorganic materials 0.000 description 1
- CPTCUNLUKFTXKF-UHFFFAOYSA-N [Ti].[Zr].[Mo] Chemical compound [Ti].[Zr].[Mo] CPTCUNLUKFTXKF-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 235000011089 carbon dioxide Nutrition 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000003574 free electron Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
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- 230000035900 sweating Effects 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J35/00—X-ray tubes
- H01J35/02—Details
- H01J35/04—Electrodes ; Mutual position thereof; Constructional adaptations therefor
- H01J35/08—Anodes; Anti cathodes
- H01J35/10—Rotary anodes; Arrangements for rotating anodes; Cooling rotary anodes
- H01J35/105—Cooling of rotating anodes, e.g. heat emitting layers or structures
- H01J35/106—Active cooling, e.g. fluid flow, heat pipes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J35/00—X-ray tubes
- H01J35/02—Details
- H01J35/04—Electrodes ; Mutual position thereof; Constructional adaptations therefor
- H01J35/08—Anodes; Anti cathodes
- H01J35/10—Rotary anodes; Arrangements for rotating anodes; Cooling rotary anodes
- H01J35/105—Cooling of rotating anodes, e.g. heat emitting layers or structures
- H01J35/107—Cooling of the bearing assemblies
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- X-Ray Techniques (AREA)
Abstract
The invention discloses a bulb tube heat dissipation system, which comprises: a bulb body and an external circulation device; the bulb body comprises a bearing, and a porous medium layer and a cooling layer which are arranged in the bearing; the porous medium layer is positioned on one side of the cooling layer far away from the bearing, and an initial cooling medium is arranged in the cooling layer; the initial cooling medium is used for absorbing heat in the bulb main body and generating phase change to generate a first-state gaseous coolant; the porous medium layer is used for guiding the first-state gaseous coolant automatically flowing into the porous medium layer to the external circulation device. According to the technical scheme, the initial cooling medium is subjected to phase change to absorb heat, so that efficient heat dissipation of the bulb tube is realized.
Description
Technical Field
The invention relates to the technical heat dissipation system field, in particular to a bulb tube heat dissipation system.
Background
During operation of the CT bulb, free electrons are generated by the hot cathode of the X-ray tube. Under the action of high voltage, electrons acquire 120-160 kV energy and bombard the anode target disk to generate X rays, wherein 99% of the energy is converted into heat energy, only 1% of the energy is converted into X rays, and the X rays are radiated to the window. Since the emitted current intensity of the beam is typically in the order of hundred milliamperes, the corresponding thermal power is several tens of kilowatts. After irradiation of a patient, the CT bulb is shut down for a period of time such that heat within the bulb dissipates. Therefore, the heat dissipation performance of the bulb directly affects the working efficiency thereof.
The existing anode straight-through water cooling technology directly adopts internal water cooling to dissipate heat of an anode target disk. The water channel inlet is arranged at the upper end of the cover plate, directly cools the metal target disk, and flows out of the tube core through the tail end of the bearing. The water-cooled convection heat exchange effect is unstable and the heat dissipation effect is affected due to the influence of the contact area and the laminar flow.
Disclosure of Invention
The invention provides a bulb tube heat dissipation system which absorbs heat through phase change of an initial cooling medium so as to realize efficient heat dissipation of a bulb tube.
According to the present invention there is provided a bulb heat dissipation system comprising: a bulb body and an external circulation device;
The bulb body comprises a bearing, and a porous medium layer and a cooling layer which are arranged in the bearing; the porous medium layer is positioned on one side of the cooling layer far away from the bearing, and an initial cooling medium is arranged in the cooling layer;
The initial cooling medium is used for absorbing heat in the bulb main body and generating phase change to generate a first-state gaseous coolant;
The porous medium layer is used for guiding the first-state gaseous coolant automatically flowing into the porous medium layer to the external circulation device.
Optionally, the external circulation device comprises a compression module, a condensation module and a form adjustment module;
The compression module is respectively communicated with the outlet end of the porous medium layer and the condensation module and is used for receiving the first-state gaseous coolant and generating a second-state gaseous coolant and transmitting the second-state gaseous coolant to the condensation module; the pressure of the second state gaseous coolant is greater than the pressure of the first state gaseous coolant, and the temperature of the second state gaseous coolant is greater than the temperature of the first state gaseous coolant;
The condensing module is used for condensing the second-state gaseous coolant to form a first-state liquid refrigerant;
The form adjustment module is respectively communicated with the condensing module and the inlet end of the cooling layer and is used for receiving the first-state liquid-state coolant and adjusting the first-state liquid-state coolant to be the initial cooling medium and transmitting the initial cooling medium to the inlet end of the cooling layer.
Optionally, the initial cooling medium comprises a liquid cooling medium;
The form adjustment module comprises an expansion valve;
The expansion valve is used for adjusting the first-state liquid coolant to be a second-state liquid coolant and transmitting the second-state liquid coolant to the inlet end of the cooling layer; the pressure of the second state liquid coolant is less than the pressure of the first state liquid coolant, and the temperature of the second state liquid coolant is less than the temperature of the first state liquid coolant.
Optionally, the initial cooling medium comprises a solid cooling medium;
The morphological adjustment module comprises: a cooling unit and a pulverizing unit;
the cooling unit is respectively communicated with the condensing module and the crushing unit and is used for adjusting the first-state liquid coolant to be a first-state solid coolant and transmitting the first-state solid coolant to the crushing unit;
The crushing unit is communicated with the inlet end of the cooling layer and is used for crushing the first-state solid-state refrigerant into a second-state solid-state refrigerant and transmitting the second-state fixed refrigerant to the inlet end of the cooling layer; the second state solid state refrigerant has a size that is smaller than the size of the first state solid state refrigerant.
Optionally, the external circulation device further comprises a conveying module, wherein the conveying module is respectively communicated with the crushing unit and the inlet end of the cooling layer and is used for conveying the second-state solid-state coolant to the inlet of the cooling layer.
Optionally, the delivery module comprises an air-cooled delivery module for blowing the second state solid coolant to an inlet of the cooling layer.
Optionally, the external circulation device further comprises: accumulating a pool;
the accumulation pool is respectively communicated with the form adjustment module and the inlet end of the cooling layer and is used for storing the initial cooling medium.
Optionally, the porous media layer comprises a plurality of pores;
the size of the pores is 50-500 μm.
Optionally, the bulb body further comprises a cathode filament, a lens and an anode target disk;
the cathode filament is used for emitting electron beams;
the lens is arranged on an electron transmission path between the cathode filament and the anode target disk and is used for adjusting the beam spot size of the electron beam;
the anode target disk is used for receiving bombardment of the electron beam to generate X-rays.
Optionally, the bearing comprises a dual support structure liquid metal bearing;
the material of the porous medium layer comprises a sintered metal material.
According to the embodiment of the invention, the porous medium layer and the cooling layer are arranged in the bearing, and the cooling layer is arranged on one side, close to the bearing, of the porous medium layer, so that the cooling layer can be in close contact with the bearing to fully absorb heat deposited in the bulb tube, initial cooling medium absorbs heat and changes phase to generate gaseous cooling agent, the air pressure in the bearing is increased along with the initial cooling medium, and the gaseous cooling agent can spontaneously flow into the porous medium layer based on the change of the air pressure, so that the gaseous cooling agent is led out to an external circulation device, and the efficient heat dissipation of the bulb tube is realized.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the invention or to delineate the scope of the invention. Other features of the present invention will become apparent from the description that follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a first bulb heat dissipation system according to an embodiment of the present invention;
FIG. 2 is a schematic view of a bearing structure provided in accordance with the present invention;
FIG. 3 is a schematic view of a bulb structure according to an embodiment of the present invention;
Fig. 4 is a schematic structural diagram of a second bulb heat dissipation system according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a third bulb heat dissipation system according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a fourth bulb heat dissipation system according to an embodiment of the present invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Fig. 1 is a schematic structural view of a first bulb heat dissipation system according to an embodiment of the present invention, fig. 2 is a schematic structural view of a bulb provided according to an embodiment of the present invention, and fig. 3 is a schematic structural view of a bearing provided according to the present invention. Referring to fig. 1,2 and 3, a bulb heat dissipation system includes: the bulb body 1 comprises a bearing 11, and a porous medium layer 111 and a cooling layer 112 which are arranged in the bearing 11, wherein the porous medium layer 111 is positioned on one side, far away from the bearing 11, of the cooling layer 112, an initial cooling medium is arranged in the cooling layer 112, the initial cooling medium is used for absorbing heat in the bulb body 1 and generating phase change to generate a first-state gaseous coolant, and the porous medium layer 111 is used for guiding the first-state gaseous coolant automatically flowing into the porous medium layer 111 to the external circulation device 2.
In particular, the bulb body 1 may be an X-ray tube, and the main function of the bearing 11 is to support and stabilize the anode, ensure its stability at high rotation speeds, and facilitate heat dissipation. The porous medium layer 111 is a solid structure with a large number of tiny and dense voids, and the cooling layer 112 is used for setting an initial cooling medium, wherein the initial cooling medium may be a liquid cooling medium or a solid cooling medium, the liquid cooling medium may include deionized water or other supercritical cooling materials, and the solid cooling medium may include dry ice. The cooling layer 112 is disposed on one side of the porous medium layer 111 near the bearing 11, so that the cooling layer 112 is in close contact with the bearing 11 to fully absorb heat deposited by the electron beam bombarding the target disk, the initial cooling medium absorbs heat and changes phase into a gaseous cooling agent in a first state, and the gaseous cooling agent can spontaneously flow into the cooling layer 112 based on air pressure change to bring heat into the bearing 11 pipeline, so that the heat is led out to the external circulation device 2.
For example, if the temperature and thermal load inside the bearing 11 are low, the initial cooling medium part undergoes a small amount of phase change, the volume of the bubbles is small, the gas phase saturation is low, the momentum of the bubbles is insufficient to overcome the capillary pressure of the porous medium and the flow resistance of the flow channel, and the bubbles cannot move further inwards, as the temperature inside the bearing 11 increases, more part of the initial cooling medium undergoes a phase change, the volume of the bubbles accumulates, grows and merges further, the bubbles pass through the porous medium to bring heat into the bearing 11 pipeline, and the heat is discharged with gas molecules.
It should be noted that the phase change process of the liquid coolant is evaporation heat absorption, and the phase change process of the solid coolant is sublimation heat absorption.
According to the embodiment of the invention, the porous medium layer and the cooling layer are arranged in the bearing, and the cooling layer is arranged on one side, close to the bearing, of the porous medium layer, so that the cooling layer can be in close contact with the bearing to fully absorb heat deposited in the bulb tube, initial cooling medium absorbs heat and changes phase to generate gaseous cooling agent, the air pressure in the bearing is increased along with the initial cooling medium, and the gaseous cooling agent can spontaneously flow into the porous medium layer based on the change of the air pressure, so that the gaseous cooling agent is led out to an external circulation device, and the efficient heat dissipation of the bulb tube is realized.
Optionally, referring to fig. 1, the external circulation device 2 includes a compression module 21, a condensation module 22, and a form adjustment module 23, where the compression module 21 is respectively communicated with the outlet end of the porous medium layer 111 and the condensation module 22, and is configured to receive the first-state gaseous coolant and generate the second-state gaseous coolant, and transmit the second-state gaseous coolant to the condensation module 22, where the pressure of the second-state gaseous coolant is greater than the pressure of the first-state gaseous coolant, and the temperature of the second-state gaseous coolant is greater than the temperature of the first-state gaseous coolant; the condensing module 22 is configured to condense the second-state gaseous coolant to form a first-state liquid coolant; the form adjustment module 23 is respectively connected to the condensation module 22 and the inlet end of the cooling layer 112, and is configured to receive the first-state liquid refrigerant and adjust the first-state liquid refrigerant to be an initial cooling medium, and transmit the initial cooling medium to the inlet end of the cooling layer 112.
Specifically, as shown in fig. 1, when the initial cooling medium absorbs heat and undergoes a phase change to generate a first-state gaseous coolant, the first-state gaseous coolant is pumped out by the compression module 21 to generate a second-state gaseous coolant, and because the compression module 21 can be a compressor, the compressor is a fluid machine, the compressor increases the internal energy of the gas by doing work on the gas, so that the temperature and the pressure of the gas are obviously improved, the pressure of the second-state gaseous coolant is greater than the pressure of the first-state gaseous coolant, and the temperature of the second-state gaseous coolant is greater than the temperature of the first-state gaseous coolant. The gaseous coolant in the second state is transferred to the condensation module 22, and the condensation module 22 may be a condenser, and after the condenser receives the gaseous coolant in the second state, the gaseous coolant in the second state starts to release heat, and as the heat is gradually released, the temperature of the coolant starts to decrease. When the temperature drops to the saturation temperature at that pressure, the gaseous refrigerant begins to condense to a liquid state, so that the condensing module 22 can convert the second state gaseous refrigerant to a first state liquid refrigerant. The form adjustment module 23 may convert the first state liquid refrigerant into an initial cooling medium for delivery to the cooling layer 112 for recycling.
It should be noted that, the external circulation device 2 may spontaneously supplement the initial cooling medium to the cooling layer 112, and the initial cooling medium is a liquid cooling medium, which is described as an example, and the external circulation device 2 may implement automatic transportation and flow adjustment of the liquid cooling medium without using a pump and a control unit. The principle is that the liquid cooling medium evaporates to form a low pressure area by utilizing the capillary force and the transpiration of the porous medium layer 111, and the liquid cooling medium in the external circulation device 2 is supplemented to the low pressure area. This process can be described by the following formula:
Wherein the method comprises the steps of Is the main power source for surface capillary pressure and automatic transportation and suction,Is the pressure differential of the flow in the porous sheet,Is the pressure differential of the flow in the fibrous layer,Is the pressure differential of the flow in the pipe,When the dynamic balance is adopted, the capillary pressure and each flow resistance are balanced, when the heat flux density is increased, the evaporation rate of the cooling liquid is increased, the curvature of the gas-liquid interface is increased, the capillary force is increased, the flow of the liquid cooling medium is increased, and the system achieves new balance and has good self-adaptability.
According to the embodiment of the invention, the compression module, the condensation module and the form adjustment module are arranged, the coolant in the first state led out by the porous medium layer is reconverted into the initial cooling medium and is transmitted to the cooling layer so as to realize the recycling of the initial cooling medium, so that the bulb tube can realize continuous heat dissipation, and the heat dissipation efficiency is further improved.
Optionally, referring to fig. 1, the initial cooling medium includes a liquid cooling medium, and the form adjustment module 23 includes an expansion valve for adjusting the first-state liquid coolant to a second-state liquid coolant, and transmitting the second-state liquid coolant to the inlet end of the cooling layer 112, wherein the pressure of the second-state liquid coolant is smaller than the pressure of the first-state liquid coolant, and the temperature of the second-state liquid coolant is smaller than the temperature of the first-state liquid coolant.
Specifically, as shown in fig. 1, when the initial cooling medium is a liquid cooling medium, the form adjustment module 23 may be an expansion valve, and after the liquid refrigerant in the first state enters the expansion valve, the throttling effect of the expansion valve causes the pressure and temperature of the refrigerant to suddenly decrease, thereby generating the liquid refrigerant in the second state. Thus, the pressure of the second-state liquid coolant is less than the pressure of the first-state liquid coolant, and the temperature of the second-state liquid coolant is less than the temperature of the first-state liquid coolant. Wherein the second liquid refrigerant is the liquid cooling medium.
According to the embodiment of the invention, when the initial cooling medium is a liquid cooling medium, the second liquid refrigerant generated by the condensing module is reduced into the liquid cooling medium through the expansion valve, and is transmitted to the cooling layer, so that the cyclic utilization of the initial cooling medium is realized, the bulb tube is enabled to realize continuous heat dissipation, and the heat dissipation efficiency is further improved.
Optionally, fig. 4 is a schematic structural diagram of a second bulb heat dissipation system according to an embodiment of the present invention, referring to fig. 4, the initial cooling medium includes a solid cooling medium, and the form adjustment module 23 includes: the cooling unit 231 is respectively communicated with the condensing module 22 and the crushing unit 232, and is used for adjusting the liquid state coolant in the first state to be the solid state coolant in the first state and transmitting the solid state coolant in the first state to the crushing unit 232, and the crushing unit 232 is communicated with the inlet end of the cooling layer 112 and is used for crushing the solid state coolant in the first state to be the solid state coolant in the second state and transmitting the solid state fixed coolant in the second state to the inlet end of the cooling layer 112, wherein the size of the solid state coolant in the second state is smaller than that of the solid state coolant in the first state.
Specifically, when the initial cooling medium is a solid cooling medium, the form adjustment module 23 is composed of a cooling unit 231 and a pulverizing unit 232, wherein the cooling unit 231 may be a cooling tower, the pulverizing unit 232 may be a pulverizer, and the cooling unit 231 further cools the liquid refrigerant in the first state until it reaches the solid temperature to form the solid coolant in the first state, that is, the solid cooling medium. The first-state solid-state coolant is crushed by the crushing unit 232 to form a second-state solid-state coolant, and the second-state solid-state coolant is a powder-state solid-state coolant so as to be uniformly adhered inside the cooling layer 112 in the following process, so that the heat absorption cycle is continuously performed, the cyclic utilization of the initial cooling medium is realized, the bulb tube is enabled to realize continuous heat dissipation, and the heat dissipation efficiency is further improved.
Optionally, fig. 5 is a schematic structural diagram of a third bulb-tube heat dissipation system according to an embodiment of the present invention, referring to fig. 5, the external circulation device 2 further includes a conveying module 24, where the conveying module 24 is respectively communicated with the pulverizing unit 232 and the inlet end of the cooling layer 112, and is used for conveying the second-state solid coolant to the inlet of the cooling layer 112.
Specifically, when the initial cooling medium is a solid cooling medium, since the solid cooling medium cannot flow in the pipeline, a conveying module 24 needs to be disposed between the pulverizing unit 232 and the cooling layer 112 to convey the solid cooling medium in the second state to the inlet of the cooling layer 112, so that the system continuously performs heat absorption circulation, thereby realizing cyclic utilization of the initial cooling medium, continuously radiating the bulb tube, and further improving the radiating efficiency.
Optionally, referring to fig. 5, the delivery module 24 includes an air cooled delivery module for blowing the second state solid coolant to the inlet of the cooling layer 112.
Specifically, the air cooling conveying module may be a fan, and the air flow is accelerated by the air cooling conveying module to blow the solid coolant in the second state to the inlet of the cooling layer 112 and uniformly adhere to the cooling layer 112, so that the heat absorption cycle is continuously performed, the cyclic utilization of the initial cooling medium is realized, the bulb tube is enabled to realize continuous heat dissipation, and the heat dissipation efficiency is further improved.
Optionally, referring to fig. 6, the external circulation device 2 further includes: the accumulation tank 25, the accumulation tank 25 communicates with the inlet ends of the form adjustment module 23 and the cooling layer 112, respectively, for storing the initial cooling medium.
Specifically, the accumulation tank 25 may be a coolant accumulation tank for storing the initial coolant medium, and the accumulation tank 25 may be configured to store resources when the initial coolant medium is supplied excessively, so as to be used when the initial coolant medium is supplied insufficiently, thereby enabling efficient use of the initial coolant medium and further improving heat dissipation efficiency.
It will be appreciated that when the initial coolant medium is a solid coolant medium, the accumulation reservoir 25 is provided between the form adjustment module 23 and the delivery module 24 for storing the solid coolant medium.
Optionally, the porous dielectric layer 111 includes a plurality of pores having a size of 50-500 μm.
Specifically, the pores are many minute pores existing between porous particles in a porous medium. The diameter of the porous particles is an important factor influencing the sweating and cooling, the reduction of the diameter of the particles reduces the pore channels, the porous specific surface area is increased, the convection heat exchange of fluid can be enhanced, but the reduction of the pore channels can reduce the permeability, the flow resistance difference of gas phase and liquid phase is more obvious, and the steam blocking effect is enhanced, so that the proper gap of the porous medium is selected, and the heat dissipation performance of the bulb tube is important. The embodiment of the invention has the advantages that the diameters of the holes are 50-500 mu m, so that the sweat and heat dissipation performance of the cooling medium can be fully exerted, and the heat dissipation efficiency of the bulb tube is further improved.
Optionally, referring to fig. 2, the bulb body 1 further includes a cathode filament 12, a lens 13, and an anode target plate 14, the cathode filament 12 is used for emitting an electron beam, the lens 13 is disposed on an electron transmission path between the cathode filament and the anode target plate 14, for adjusting a beam spot size of the electron beam, and the anode target plate 14 is used for receiving bombardment of the electron beam to generate X-rays.
Specifically, the cathode filament 12 may be a flat filament electron gun, and the flat filament is used as an electron emission source, which helps to improve the stability and lifetime of the filament. The lens 13 may be a double quadrupole lens group, and is disposed on an electron transmission path between the cathode filament 12 and the anode target plate 14 to adjust a beam spot size of an electron beam, and the anode target plate 14 is made of Titanium-Zirconium-Molybdenum Alloy (TZM) and graphite, so that the TZM and graphite are used as materials of the anode target plate 14 to maintain the temperature stability of the anode target plate 14, and further improve the heat dissipation efficiency while improving the performance and lifetime of the X-ray tube.
Alternatively, referring to fig. 3, bearing 11 comprises a dual support structure liquid metal bearing, and the material of the porous dielectric layer comprises a sintered metal material.
Specifically, the bearing 11 is a liquid metal bearing with a dual support structure, which can increase the service life of the bulb tube and the inherent high thermal conductivity of the liquid metal, so as to increase the conduction speed of the heat of the target disc to the cooling liquid. The material of the porous dielectric layer 111 is a high-temperature sintered metal material, and the high-temperature sintering process can significantly improve the mechanical strength of the porous metal, so that the porous metal is more firm and durable, and the metal material generally has better thermal stability after being subjected to high-temperature treatment, and can keep the stability of the size and the shape under extreme temperature change.
The above embodiments do not limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.
Claims (10)
1. A bulb heat dissipation system, comprising: a bulb body and an external circulation device;
The bulb body comprises a bearing, and a porous medium layer and a cooling layer which are arranged in the bearing; the porous medium layer is positioned on one side of the cooling layer far away from the bearing, and an initial cooling medium is arranged in the cooling layer;
The initial cooling medium is used for absorbing heat in the bulb main body and generating phase change to generate a first-state gaseous coolant;
The porous medium layer is used for guiding the first-state gaseous coolant automatically flowing into the porous medium layer to the external circulation device.
2. The bulb heat dissipation system of claim 1, wherein the external circulation device comprises a compression module, a condensation module, and a morphology adjustment module;
The compression module is respectively communicated with the outlet end of the porous medium layer and the condensation module and is used for receiving the first-state gaseous coolant and generating a second-state gaseous coolant and transmitting the second-state gaseous coolant to the condensation module; the pressure of the second state gaseous coolant is greater than the pressure of the first state gaseous coolant, and the temperature of the second state gaseous coolant is greater than the temperature of the first state gaseous coolant;
The condensing module is used for condensing the second-state gaseous coolant to form a first-state liquid refrigerant;
The form adjustment module is respectively communicated with the condensing module and the inlet end of the cooling layer and is used for receiving the first-state liquid-state coolant and adjusting the first-state liquid-state coolant to be the initial cooling medium and transmitting the initial cooling medium to the inlet end of the cooling layer.
3. The bulb heat dissipation system of claim 2, wherein the initial cooling medium comprises a liquid cooling medium;
The form adjustment module comprises an expansion valve;
The expansion valve is used for adjusting the first-state liquid coolant to be a second-state liquid coolant and transmitting the second-state liquid coolant to the inlet end of the cooling layer; the pressure of the second state liquid coolant is less than the pressure of the first state liquid coolant, and the temperature of the second state liquid coolant is less than the temperature of the first state liquid coolant.
4. The bulb heat dissipation system of claim 2, wherein the initial cooling medium comprises a solid cooling medium;
The morphological adjustment module comprises: a cooling unit and a pulverizing unit;
the cooling unit is respectively communicated with the condensing module and the crushing unit and is used for adjusting the first-state liquid coolant to be a first-state solid coolant and transmitting the first-state solid coolant to the crushing unit;
The crushing unit is communicated with the inlet end of the cooling layer and is used for crushing the first-state solid-state refrigerant into a second-state solid-state refrigerant and transmitting the second-state fixed refrigerant to the inlet end of the cooling layer; the second state solid state refrigerant has a size that is smaller than the size of the first state solid state refrigerant.
5. The bulb heat dissipation system according to claim 4, wherein the external circulation device further comprises a delivery module in communication with the pulverizing unit and the inlet end of the cooling layer, respectively, for delivering the second state solid state coolant to the inlet of the cooling layer.
6. The bulb heat dissipation system of claim 5, wherein the delivery module comprises an air-cooled delivery module for blowing the second state solid coolant to an inlet of the cooling layer.
7. The bulb heat dissipation system according to claim 2, wherein the external circulation device further comprises: accumulating a pool;
the accumulation pool is respectively communicated with the form adjustment module and the inlet end of the cooling layer and is used for storing the initial cooling medium.
8. The bulb heat dissipation system of claim 1, wherein the porous dielectric layer comprises a plurality of pores;
the size of the pores is 50-500 μm.
9. The bulb heat dissipation system of claim 1, wherein the bulb body further comprises a cathode filament, a lens, and an anode target disk;
the cathode filament is used for emitting electron beams;
the lens is arranged on an electron transmission path between the cathode filament and the anode target disk and is used for adjusting the beam spot size of the electron beam;
the anode target disk is used for receiving bombardment of the electron beam to generate X-rays.
10. The bulb heat dissipation system of claim 1, wherein the bearing comprises a dual support structure liquid metal bearing;
the material of the porous medium layer comprises a sintered metal material.
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| CN201916367U (en) * | 2010-12-28 | 2011-08-03 | 中国科学院电工研究所 | Bearing self-circulation evaporation cooling device |
| US20150364289A1 (en) * | 2014-06-11 | 2015-12-17 | Metal Industries Research & Development Centre | Radiation generating apparatus |
| CN109844897A (en) * | 2016-11-26 | 2019-06-04 | 万睿视影像有限公司 | Radiator for X-ray tube anode |
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| CN210138141U (en) * | 2019-03-28 | 2020-03-13 | 上海联影医疗科技有限公司 | Gradient coil system and medical imaging equipment |
| CN112627914A (en) * | 2020-12-24 | 2021-04-09 | 华能河南中原燃气发电有限公司 | Composite cooling device for enhancing heat dissipation effect of turbonator |
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2024
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201916367U (en) * | 2010-12-28 | 2011-08-03 | 中国科学院电工研究所 | Bearing self-circulation evaporation cooling device |
| US20150364289A1 (en) * | 2014-06-11 | 2015-12-17 | Metal Industries Research & Development Centre | Radiation generating apparatus |
| CN109844897A (en) * | 2016-11-26 | 2019-06-04 | 万睿视影像有限公司 | Radiator for X-ray tube anode |
| CN210138141U (en) * | 2019-03-28 | 2020-03-13 | 上海联影医疗科技有限公司 | Gradient coil system and medical imaging equipment |
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