CN211240584U - Novel high-power digital transmitter submergence formula high-efficient oil cooling heat dissipation of radio and television device - Google Patents
Novel high-power digital transmitter submergence formula high-efficient oil cooling heat dissipation of radio and television device Download PDFInfo
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- CN211240584U CN211240584U CN201922035713.2U CN201922035713U CN211240584U CN 211240584 U CN211240584 U CN 211240584U CN 201922035713 U CN201922035713 U CN 201922035713U CN 211240584 U CN211240584 U CN 211240584U
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Abstract
The utility model discloses a novel immersed high-efficiency oil-cooling heat dissipation device for a high-power digital transmitter of a broadcast television, which comprises a power amplification unit, an oil-cooling cabinet, a heat exchanger, a water tower radiator and an air-cooling radiator, wherein the oil-cooling cabinet is filled with cooling oil, the power amplification unit is arranged in the oil-cooling cabinet and immersed in the cooling oil, and the oil-cooling cabinet is provided with an oil inlet and an oil outlet; the oil outlet is connected with a heat exchanger and an air-cooled radiator respectively, the heat exchanger is connected with a water tower radiator, the air-cooled radiator and the heat exchanger are connected with the oil inlet respectively, the heat exchanger is connected with the water tower radiator, and the air-cooled radiator and the heat exchanger form a parallel loop with the oil-cooled cabinet. The power amplification unit directly transmits heat to cooling oil, the cooling oil absorbs the heat and carries out heat exchange through a heat exchanger or an air-cooled radiator, and the cooling oil flowing into the oil-cooled cabinet is kept in a lower range, so that the working temperature of the power amplification unit in the oil-cooled cabinet is constant, and the effect of overall efficient heat dissipation is achieved.
Description
Technical Field
The utility model relates to a high-power electrical apparatus heat dissipation equipment technical field, in particular to novel high-efficient oil cooling heat dissipation of high-power digital transmitter submergence formula of radio and television device.
Background
The final amplifying unit of the power amplifier of the broadcast television transmitting and transmitting equipment, no matter the traditional analog transmitter or the digital transmitter which is developed rapidly at present, has the characteristics of high power, high energy consumption and low efficiency, the generated heat is very high during the operation, and the high temperature of the pin of the MOS power amplifier tube which is expensive leads to the reduction of the efficiency and the damage of the MOS power amplifier tube. At the present stage, most of domestic and foreign mainstream digital transmitters adopt natural air cooling, circulating water cooling and heat pipe cooling heat dissipation systems, most of transmitting station machine rooms adopt air-conditioning refrigeration and fan heat extraction modes for heat dissipation, the cooling modes are high in noise, excessive in dust and low in efficiency, the failure rate of transmitter equipment is high due to long-term operation, and most importantly, the power consumption is high, so that the operation and maintenance cost of the transmitting station is high. Therefore, the heat dissipation and cooling system of the broadcast television transmitter has been a serious technical problem for manufacturers and technical practitioners.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a novel high-power digital transmitter submergence formula of radio and television high efficiency oil is cold heat abstractor to solve the problem that exists among the foretell prior art. The utility model adopts the following technical scheme:
a novel immersed high-efficiency oil-cooling heat dissipation device for a high-power digital transmitter of a broadcast television comprises a power amplification unit, an oil-cooling cabinet, a heat exchanger, a water tower radiator and an air-cooling radiator, wherein cooling oil is contained in the oil-cooling cabinet; the oil outlet is connected with a heat exchanger and an air-cooled radiator respectively, the heat exchanger is connected with a water tower radiator, the air-cooled radiator and the heat exchanger are connected with the oil inlet respectively, the heat exchanger is connected with the water tower radiator, and the air-cooled radiator and the heat exchanger form a parallel loop with the oil-cooled cabinet.
The oil cooling machine further comprises a controller with a display, a plurality of temperature sensors electrically connected with the input end of the controller and a plurality of electric valves electrically connected with the output end of the controller, wherein a first temperature sensor, a second temperature sensor, a third temperature sensor and a fourth temperature sensor are respectively arranged in the oil inlet, the oil outlet, the air-cooled radiator and the oil cooling machine cabinet of the oil cooling machine cabinet; a first electric valve is arranged between the oil outlet and the heat exchanger, a second electric valve is arranged between the oil outlet and the air-cooled radiator, a third electric valve is arranged between the heat exchanger and the oil inlet, and a fourth electric valve is arranged between the air-cooled radiator and the oil inlet.
Furthermore, a circulating cooling water pump is arranged between the heat exchanger and the water tower radiator, and the output end of the controller is respectively connected with a motor and the circulating cooling water pump of the air cooling radiator.
Furthermore, the oil outlet is provided with two parallel variable frequency oil pumps which are used for standby, and the inlet of each variable frequency oil pump is respectively provided with a fifth electric valve and a sixth electric valve.
Further, the oil cooling cabinet is internally and fixedly connected with a support, the power amplification unit comprises an amplification circuit and a porous copper plate, the amplification circuit is fixedly connected to the porous copper plate, and the porous copper plate is fixedly connected with the support.
Further, the oil cooling cabinet adopts a double-layer nested structure made of SUS304 with the thickness of 2.5mm, a keel is arranged between the two layers of SUS304, and a non-combustible heat insulation material is filled in the keel.
Further, the cooling oil is dimethyl silicone oil
The utility model has the advantages as follows:
1. the utility model discloses be applied to power amplification unit with a novel immersion heat dissipation mode, power amplification unit is direct to give the coolant oil with the heat transfer, and the coolant oil absorbs the heat and carries out the heat exchange through heat exchanger or forced air cooling radiator, and the coolant oil that flows into in the cold rack of oil keeps in lower within range to the operating temperature of the power amplification unit in the cold rack of messenger oil is invariable, reaches whole high-efficient radiating effect. Because the fan part of the power amplification unit is removed, a noise source is eliminated, absolute silence of the machine room can be basically achieved, the central volume of the machine room is far lower than the relevant environmental noise value specified by the national standard, a large amount of power resources are saved, carbon emission is reduced, and the machine room is environment-friendly and sanitary. In addition, the oil cooling cabinet designed for the broadcast television digital transmitter greatly reduces the use space of the machine room, fundamentally solves various problems of narrow space, low expansibility and high reconstruction cost of most broadcast television transmitter machine rooms, and really realizes the integration of machine room office areas with environmental protection, human-oriented property and economic development.
2. The utility model discloses be equipped with the controller of taking the display, the input and a plurality of temperature sensor electric connection of controller, the temperature display that temperature sensor will monitor in real time is on the display, has ensured that the user can grasp operating temperature directly perceivedly. The output end of the controller is electrically connected with a plurality of electric valves, a motor and a circulating cooling water pump, and according to the temperature monitored by the temperature sensor, the controller starts the air cooling radiator or the heat exchanger and the water tower radiator, so that the function of automatically switching the radiating system in different application scenes and seasons is realized.
3. The main power consumption part of high-power radio and television transmission system is the power consumption of parts such as equipment inside fan, power amplification unit and air conditioner refrigeration among the prior art, and wherein the power consumption of equipment inside fan and air conditioner refrigeration two items accounts for more than 85% approximately, the utility model discloses compare in current radio and television digital transmitter forced air cooling heat dissipation energy consumption reduce 90% -95%, take the 3KW digital transmitter of current mainstream as an example, practice thrift about 13 ten thousand degrees of electric power annually, the expenditure is practiced thrift more than 10 ten thousand.
4. The utility model discloses a dimethyl silicon oil is selected for use to the cooling oil, and dimethyl silicon oil has special smoothness nature, compliance, hydrophobicity, good chemical stability, excellent electrical insulation and high low temperature resistance. The dimethyl silicone oil has high stability under strong electric field, strong radiation and high temperature through experiments.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
fig. 2 is a schematic structural diagram of the middle oil cooling cabinet of the present invention;
FIG. 3 is a side view of FIG. 2;
FIG. 4 is a cross-sectional view taken along the line A-A in FIG. 2;
fig. 5 is a graph comparing gain (frequency 770MHz) before and after immersion of a single power amplification circuit board.
Shown in the figure: 1-an oil cooling cabinet, 2-a bracket, 3-a second temperature sensor, 4-a power amplification unit, 5-a fourth temperature sensor, 6-a first temperature sensor, 7-a variable frequency oil pump, 8-a fifth electric valve, 9-a sixth electric valve, 10-a first electric valve, 11-a second electric valve, 12-a controller, 13-a third temperature sensor, 14-an air cooling radiator, 15-a heat exchanger, 16-a circulating cooling water pump, 17-a water tower radiator, 18-a third electric valve, 19-a fourth electric valve, 20-an oil inlet, 21-an oil outlet, 22-a control wire buckle, 23-a signal wire port and 24-a power wire port.
Detailed Description
As shown in fig. 1, a novel immersed high-efficiency oil-cooled heat dissipation device for a high-power digital transmitter of a broadcast television comprises a power amplification unit, an oil-cooled cabinet 1, a heat exchanger 15, a water tower radiator 17 and an air-cooled radiator 14, wherein cooling oil is contained in the oil-cooled cabinet 1, the power amplification unit 4 is arranged in the oil-cooled cabinet 1 and immersed in the cooling oil, and the cooling oil is simethicone.
The oil cooling cabinet 1 is of a double-layer nested structure made of SUS304 with the thickness of 2.5mm, a keel is arranged between the two SUS304 layers, and a non-combustible heat insulation material is filled in the keel. The front surface of the oil cooling cabinet 1 is provided with an oil inlet 20 and an oil outlet 21, and the side surface is provided with a control box port, a signal line port and a power line port. The oil outlet 21 is respectively connected with a heat exchanger 15 and an air-cooled radiator 14, the heat exchanger 15 is connected with a water tower radiator 17, the air-cooled radiator 14 and the heat exchanger 15 are respectively connected with the oil inlet 20, the heat exchanger 15 is connected with the water tower radiator 17, the air-cooled radiator 14 and the heat exchanger 15 form a parallel loop with the oil-cooled cabinet 1, and the equipment is connected by adopting PVC pipe fittings with the diameter of 32 mm.
The utility model also comprises a controller 12 with a display, a plurality of temperature sensors electrically connected with the input end of the controller 12 and a plurality of electric valves electrically connected with the output end of the controller, wherein a first temperature sensor 6, a second temperature sensor 3, a third temperature sensor 13 and a fourth temperature sensor 5 are respectively arranged in the oil inlet 20, the oil outlet 21, the air-cooled radiator 14 of the oil-cooled cabinet 1 and the oil-cooled cabinet 1; a first electric valve 10 is arranged between the oil outlet and the heat exchanger, a second electric valve 11 is arranged between the oil outlet 21 and the air-cooled radiator 14, a third electric valve 18 is arranged between the heat exchanger 15 and the oil inlet 20, and a fourth electric valve 19 is arranged between the air-cooled radiator 14 and the oil inlet 20.
A circulating cooling water pump 16 is arranged between the heat exchanger 15 and the water tower radiator 17, and the output end of the controller 12 is respectively connected with a motor of the air cooling radiator 14 and the circulating cooling water pump 16. The oil outlet 21 is provided with two parallel variable frequency oil pumps 7, one for one, and the inlet of each variable frequency oil pump 7 is respectively provided with a fifth electric valve 8 and a sixth electric valve 9.
Fixedly connected with support 2 in the oil cooling rack 1, power amplification unit 4 includes amplifier circuit and porous copper, and amplifier circuit fixed connection is to porous copper, porous copper and support 2 fixed connection.
Cooling Medium selection experiment
To ensure the scientific rigor of the utility model, we firstly select different cooling media by contrast and dip the single power amplifier of the digital transmitter into the test. The method comprises the following steps:
1. in this experiment, the most important is the selection of the insulating heat-conducting liquid. The insulating heat-conducting liquid is used for isolating electric conductors with different potentials and can rapidly conduct heat, and is also called insulating heat-conducting oil. It is mainly used to replace gas and fill the gap between solid material and equipment to raise its dielectric performance and improve the heat dissipating capacity of equipment. The liquid insulating material can be divided into three categories of mineral insulating oil, vegetable oil and synthetic insulating oil according to material sources.
(1) The mineral insulating oil is a mixture of various hydrocarbons, so that the components which reduce the insulating property are difficult to remove, the preparation process is complex, and the high-frequency radiation resistance is not realized. It has C-H chain breaking and valence splitting under the conditions of electric heating and high-frequency radiation. After such oils are aged at their cracking prices, they evolve hydrogen and form waxy substances:
2CnH2n+2(oil) → H2(gas) + CnH4n+2(wax)
So that this oil is not suitable as a coolant for transmitters.
(2) Vegetable oil, one of natural insulating oils, has the disadvantages of easy combustion, low heat resistance, low dielectric constant and relatively low cost performance, and is not suitable for being used as a heat conducting medium of a transmitter.
(3) Dimethyl silicone oil is selected as the cooling medium of the utility model in the synthetic insulating oil. It is known from the chemical structure theory that all materials belonging to Si-O bond and heterocyclic compound have excellent performances of radiation resistance, high temperature resistance and the like.
From the molecular structure of the benzyl silicone oil, the benzyl silicone oil takes Si-O as a main chain and R is a phenyl group. The chain energy is large and has relative stability under strong electric field, strong radiation and high temperature. Cyclo-dimethyl siloxane is the chemical name of dimethyl silicone oil, and the molecular formula is: (CH3)3SiO [ (CH3)2SiO ] n-Si (CH3)3, which is a colorless transparent novel synthetic polymer material with various viscosities (50 +/-10 mp.s-1000000 +/-10000 mp.s) from extremely flowable liquid to thick semi-solid.
The dimethyl silicone oil has special smoothness, flexibility, hydrophobicity, good chemical stability, excellent electrical insulation property and high and low temperature resistance. High flash point, low solidifying point, long service life at-50 deg.C to +200 deg.C, small viscosity-temperature coefficient, high compression ratio, low surface tension, good water and moisture resistance, and low specific heat conductivity. And the dimethyl silicone oil has extremely strong inertia, good oxidation resistance, almost no toxicity and good environmental protection performance, and is an ideal insulating heat-conducting liquid.
Next, it was determined whether the normal use of the power amplification unit was affected when the power amplification unit was immersed in simethicone.
A single power amplification circuit board (a single power amplification module comprises a plurality of power amplification boards, and a BLF888E amplification tube circuit is selected as the single power amplification board according to power) is selected, and the circuit board is mainly used for amplifying a low-power television video signal output by an exciter, and the power amplification capacity is 2000W.
Designing a low-power signal input interface and a high-power output absorption load of the power amplification circuit board, and then immersing the whole circuit board into a proper container filled with dimethyl silicone oil, as shown in fig. 5, wherein white is-36.33 dB before immersion, yellow is-32.07 dB gain after immersion, and the gain difference is 4.26 dB;
through a week of power-on test, single power amplification circuit board normal work, core area shoulder index does not change, and wherein takes the shoulder index to use keySights N9030A to carry out 48 hours tracking test, and this gain index is stable at-32 +/-0.5 dB, tentatively proves to immerse transmitter core circuit completely in the inertia cold song does not influence equipment normal work in some way, has confirmed that this utility model uses cooling system is feasible, reliable.
The working process of the utility model is as follows:
in an initial state, the sixth electric valve 9, the second electric valve 11 and the fourth electric valve 19 are opened, the other electric valves are in a closed state, the air-cooled radiator 14 is started, and cooling oil flowing out of the oil outlet flows into the oil-cooled cabinet 1 through the oil inlet 20 after being cooled by the air-cooled radiator 14. The first temperature sensor 6, the second temperature sensor 3, the third temperature sensor 13 and the fourth temperature sensor 5 transmit the temperature monitored in real time to the controller 12 and display it on the display. The controller 12 is preset with a highest critical temperature and a lowest critical temperature, when the monitored temperature of the second temperature sensor 3 reaches the highest critical temperature, the controller closes the second electric valve 11 and the fourth electric valve 19, opens the first electric valve 10, the third electric valve 18 and the circulating cooling water pump 16, cooling oil flowing out of the oil outlet exchanges heat with cooling water through the heat exchanger 15 and then flows into the oil cooling cabinet through the oil inlet, and cooling water after heat exchange flows into the water tower radiator 17 through the circulating cooling water pump 16 to dissipate heat and then flows into the heat exchanger 15 again. When the detected temperature of the second temperature sensor 3 is reduced to the minimum critical temperature, the controller 12 closes the first electric valve 10, the third electric valve 18 and the circulating cooling water pump 16, reopens the second electric valve 11 and the fourth electric valve 19, and starts the air-cooled radiator 14.
When the variable frequency oil pump 7 needs to be switched, the fifth electric valve 8 is opened, and the sixth electric valve 9 is closed at the same time, so that the switching between the main variable frequency oil pump 7 and the auxiliary variable frequency oil pump 7 is realized.
The above embodiments are only used for illustrating but not limiting the technical solutions of the present invention, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the present invention may be modified or substituted with equivalents without departing from the spirit and scope of the invention, which should be construed as being limited only by the claims.
Claims (7)
1. A novel immersed high-efficiency oil-cooling heat dissipation device for a high-power digital transmitter of a broadcast television comprises a power amplification unit, and is characterized by further comprising an oil-cooling cabinet, a heat exchanger, a water tower radiator and an air-cooling radiator, wherein cooling oil is contained in the oil-cooling cabinet, the power amplification unit is arranged in the oil-cooling cabinet and immersed in the cooling oil, and the oil-cooling cabinet is provided with an oil inlet and an oil outlet; the oil outlet is connected with a heat exchanger and an air-cooled radiator respectively, the heat exchanger is connected with a water tower radiator, the air-cooled radiator and the heat exchanger are connected with the oil inlet respectively, the heat exchanger is connected with the water tower radiator, and the air-cooled radiator and the heat exchanger form a parallel loop with the oil-cooled cabinet.
2. The immersed efficient oil-cooled heat dissipation device of the novel broadcast television high-power digital transmitter of claim 1, further comprising a controller with a display, a plurality of temperature sensors electrically connected with an input end of the controller, and a plurality of electric valves electrically connected with an output end of the controller, wherein a first temperature sensor, a second temperature sensor, a third temperature sensor and a fourth temperature sensor are respectively arranged in an oil inlet, an oil outlet, an air-cooled radiator and the oil-cooled cabinet of the oil-cooled cabinet; a first electric valve is arranged between the oil outlet and the heat exchanger, a second electric valve is arranged between the oil outlet and the air-cooled radiator, a third electric valve is arranged between the heat exchanger and the oil inlet, and a fourth electric valve is arranged between the air-cooled radiator and the oil inlet.
3. The immersed high-efficiency oil-cooled heat dissipation device for the novel broadcast television high-power digital transmitter as claimed in claim 2, wherein a circulating cooling water pump is arranged between the heat exchanger and the water tower radiator, and the output end of the controller is respectively connected with a motor of the air-cooled radiator and the circulating cooling water pump.
4. The immersed high-efficiency oil-cooled heat dissipation device for the high-power digital transmitter of the novel broadcast television as claimed in any one of claims 1 to 3, wherein the oil outlet is provided with two variable-frequency oil pumps connected in parallel, one variable-frequency oil pump is used for one spare variable-frequency oil pump, and the inlet of each variable-frequency oil pump is respectively provided with a fifth electric valve and a sixth electric valve.
5. The immersed high-efficiency oil-cooled heat dissipation device for the high-power digital transmitter of the novel broadcast television is characterized in that a support is fixedly connected in the oil-cooled cabinet, the power amplification unit comprises an amplification circuit and a porous copper plate, the amplification circuit is fixedly connected to the porous copper plate, and the porous copper plate is fixedly connected with the support.
6. A novel immersed high-efficiency oil-cooled heat dissipation device for a high-power digital transmitter of a broadcast television as claimed in any one of claims 1 to 3, wherein the oil-cooled cabinet is of a double-layer nested structure made of SUS304 with the thickness of 2.5mm, a keel is arranged between the two layers of SUS304, and the inside of the keel is filled with a non-combustible heat insulation material.
7. The immersed high-efficiency oil-cooled heat dissipation device for the high-power digital transmitter of the novel broadcast television according to any one of claims 1 to 3, wherein the cooling oil is simethicone.
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| CN201922035713.2U CN211240584U (en) | 2019-11-22 | 2019-11-22 | Novel high-power digital transmitter submergence formula high-efficient oil cooling heat dissipation of radio and television device |
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| CN201922035713.2U CN211240584U (en) | 2019-11-22 | 2019-11-22 | Novel high-power digital transmitter submergence formula high-efficient oil cooling heat dissipation of radio and television device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110891404A (en) * | 2019-11-22 | 2020-03-17 | 河南省无线发射传输管理中心 | Novel high-power digital transmitter submergence formula high-efficient oil cooling heat dissipation of radio and television device |
| CN112236015A (en) * | 2020-10-28 | 2021-01-15 | 浙江佳乐科仪股份有限公司 | From heat dissipation type converter rack |
-
2019
- 2019-11-22 CN CN201922035713.2U patent/CN211240584U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110891404A (en) * | 2019-11-22 | 2020-03-17 | 河南省无线发射传输管理中心 | Novel high-power digital transmitter submergence formula high-efficient oil cooling heat dissipation of radio and television device |
| CN112236015A (en) * | 2020-10-28 | 2021-01-15 | 浙江佳乐科仪股份有限公司 | From heat dissipation type converter rack |
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