CN108684197B - Electronic equipment and heat dissipation control method thereof - Google Patents
Electronic equipment and heat dissipation control method thereof Download PDFInfo
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- CN108684197B CN108684197B CN201810836618.XA CN201810836618A CN108684197B CN 108684197 B CN108684197 B CN 108684197B CN 201810836618 A CN201810836618 A CN 201810836618A CN 108684197 B CN108684197 B CN 108684197B
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- 230000017525 heat dissipation Effects 0.000 title claims abstract description 128
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000001514 detection method Methods 0.000 claims abstract description 70
- 230000005540 biological transmission Effects 0.000 claims abstract description 27
- 238000001816 cooling Methods 0.000 claims description 51
- 239000004973 liquid crystal related substance Substances 0.000 description 4
- 230000005855 radiation Effects 0.000 description 4
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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
- H05K7/20954—Modifications to facilitate cooling, ventilating, or heating for display panels
- H05K7/20972—Forced ventilation, e.g. on heat dissipaters coupled to components
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
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- Engineering & Computer Science (AREA)
- Thermal Sciences (AREA)
- Microelectronics & Electronic Packaging (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
The invention discloses electronic equipment and a heat dissipation control method thereof, relates to the technical field of heat dissipation of electronic equipment, and aims to solve the technical problem that the electronic equipment in the related art cannot meet the requirements of sufficient heat dissipation and reduced power consumption at the same time. The electronic equipment comprises a shell, wherein an electronic device and a heat dissipation space for heat dissipation of the electronic device are arranged in the shell, the electronic equipment further comprises a heat dissipation system and a power input end, the heat dissipation system comprises a first heat dissipation fan, a second heat dissipation fan, a thermoelectric generator, a current detection unit and a temperature detection unit, the first heat dissipation fan and the second heat dissipation fan can supply air to the heat dissipation space, the first heat dissipation fan is electrically connected with a power transmission end of the thermoelectric generator, the second heat dissipation fan is electrically connected with the power input end, the current detection unit is used for detecting the magnitude of a current value of output current of the power transmission end, and the temperature detection unit is used for detecting the temperature value of the electronic device. The invention can be used for heat dissipation of electronic equipment such as OLED display devices and the like.
Description
Technical Field
The present invention relates to the field of electronic device heat dissipation technologies, and in particular, to an electronic device and a heat dissipation control method thereof.
Background
In the technical field of display, an Organic Light-Emitting Diode (OLED) display device belongs to an electroluminescent device, and has the advantages of self-luminescence, high luminous efficiency, low working voltage, light weight, flexibility, simple manufacturing process and the like, and is widely applied to the fields of display and the like.
Currently, during the operation of an OLED display device, a large amount of heat is generated by the display panel, especially for a display device having a large-sized OLED display panel (such as a large-sized OLED television), if the heat generated by the display panel cannot be timely dissipated, the heat accumulated in the OLED display device may cause the working environment in the OLED display device to be too high, resulting in aging of the internal devices of the OLED display device, and further affecting the service life of the OLED display device. Therefore, how to effectively dissipate heat is of great importance to improve the life of the OLED display device.
In the related art, the OLED display device dissipates heat of the display panel by providing a plurality of heat dissipation fans inside a housing of the display device, however, the plurality of heat dissipation fans simultaneously work to dissipate heat of the display panel, thus consuming more electric energy and increasing power consumption of the OLED display device; if the number of the cooling fans is reduced to reduce the power consumption of the OLED display device, the heat dissipation of the display panel is insufficient, thereby affecting the service life of the OLED display device. As can be seen, the OLED display device in the related art is not capable of satisfying both of the requirements of sufficient heat dissipation and reduction of power consumption.
Disclosure of Invention
The embodiment of the invention provides electronic equipment and a heat dissipation control method thereof, which are used for solving the technical problem that the electronic equipment in the related art cannot simultaneously meet the requirements of fully dissipating heat and reducing power consumption.
In order to achieve the above object, in a first aspect, an embodiment of the present invention provides an electronic device, including a housing, in which an electronic device and a heat dissipation space for dissipating heat of the electronic device are disposed, and further including a heat dissipation system and a power input end, where the heat dissipation system includes a first heat dissipation fan, a second heat dissipation fan, a thermoelectric generator, a current detection unit, and a temperature detection unit, where the first heat dissipation fan and the second heat dissipation fan can supply air to the heat dissipation space, the first heat dissipation fan is electrically connected with a power transmission end of the thermoelectric generator, the second heat dissipation fan is electrically connected with the power input end, and the current detection unit is used to detect a current value of an output current of the power transmission end, and the temperature detection unit is used to detect a temperature value of the electronic device.
Further, the heat dissipation system further comprises a processing module, the processing module is electrically connected with the power input end, and the second heat dissipation fan is electrically connected with the processing module; the current detection unit is further used for feeding back an intensity value of a first electric signal to the processing module, wherein the first electric signal is an electric signal used for representing the magnitude of a current value of the output current of the power transmission end; the temperature detection unit is further used for feeding back an intensity value of a second electric signal to the processing module, wherein the second electric signal is an electric signal used for representing the temperature value of the electronic device; the processing module is used for outputting a third electric signal to start the second cooling fan when the intensity value of the first electric signal fed back by the current detection unit is larger than a first preset intensity value and the intensity value of the second electric signal fed back by the temperature detection unit is larger than a second preset intensity value.
Still further, the processing module includes a first comparator, a second comparator, a first reference source, a second reference source, an AND operator, and a digital-to-analog converter; the first comparator, the second comparator, the AND arithmetic unit and the digital-to-analog converter are all electrically connected with the power input end; the first comparator comprises a first input end, a second input end and a first output end, the output end of the temperature detection unit is electrically connected with the first input end, the first reference source is electrically connected with the second input end, and the first reference source is used for outputting the second electric signal with the intensity value being the second preset intensity value to the second input end; the second comparator comprises a third input end, a fourth input end and a second output end, the output end of the current detection unit is electrically connected with the third input end, the second reference source is electrically connected with the fourth input end, and the second reference source is used for outputting the first electric signal with the intensity value being the first preset intensity value to the fourth input end; the AND arithmetic unit comprises a fifth input end, a sixth input end and a third output end, wherein the first output end is in electric current connection with the fifth input end, the second output end is electrically connected with the sixth input end, the third output end is electrically connected with the input end of the digital-to-analog converter, and the output end of the digital-to-analog converter is electrically connected with the second cooling fan.
Still further, the processing module further includes a boost regulator, an input end of the boost regulator is electrically connected to an output end of the digital-to-analog converter, and an output end of the boost regulator is electrically connected to the second cooling fan.
Further, the heat dissipation system further comprises a first heat conduction contact and a second heat conduction contact, wherein the first heat conduction contact is located outside the shell and is in heat conduction connection with the cold end of the thermoelectric generator, the second heat conduction contact is located in the heat dissipation space and is in contact with the electronic device, and the second heat conduction contact is in heat conduction connection with the hot end of the thermoelectric generator.
Further, the number of the first cooling fans, the thermoelectric generator, the first heat conduction contacts and the second heat conduction contacts is multiple, the first cooling fans can supply air to the cooling space, and the power transmission end of each thermoelectric generator is electrically connected with at least one first cooling fan; each first heat conduction contact is positioned outside the shell and is in heat conduction connection with the cold end of the corresponding thermoelectric generator; each second heat conduction contact is positioned in the heat dissipation space and is in contact with the electronic device, and each second heat conduction contact is in heat conduction connection with the corresponding hot end of the thermoelectric generator; the number of the current detection units is multiple, and each current detection unit is used for detecting the current value of the output current of the power transmission end corresponding to the current detection unit.
Still further, the thermoelectric generator is located within the housing and outside the heat dissipation space.
Further, the temperature detection unit comprises a temperature sensor and a third heat conduction contact, the temperature sensor comprises a temperature sensing part, the third heat conduction contact is located in the heat dissipation space and is in contact with the electronic device, and the third heat conduction contact is in heat conduction connection with the temperature sensing part.
Further, the number of the third heat conduction contacts is multiple, and the third heat conduction contacts are all located in the heat dissipation space and are respectively contacted with different parts of the electronic device.
Further, the current detection unit comprises a current sensor, an input end of the current sensor is electrically connected with the power transmission end, and an output end of the current sensor is electrically connected with the processing module.
In a second aspect, an embodiment of the present invention provides a heat dissipation control method of an electronic device as described in the first aspect, including the following steps:
starting the first cooling fan;
and in the working process of the first cooling fan, when the current value detected by the current detection unit is larger than a preset current value and the temperature value detected by the temperature detection unit is higher than a preset temperature value, starting the second cooling fan.
According to the electronic equipment and the heat dissipation control method thereof, the first heat dissipation fan is electrically connected with the power transmission end of the thermoelectric generator, so that the thermoelectric generator can generate power according to the temperature difference of the surrounding environment, the first heat dissipation fan is powered, and when the electronic equipment works, the first heat dissipation fan is started to supply air into the heat dissipation space, the flow of air in the heat dissipation space is accelerated, and the sufficient heat dissipation of electronic devices is ensured. Because the electric energy consumed by the first cooling fan is provided by the thermoelectric generator, the first cooling fan does not need to consume the electric energy provided by an external power supply, and the power consumption of the electronic equipment is greatly reduced; because the second radiator fan is electrically connected with the power input end, the current detection unit is used for detecting the current value of the output current of the power transmission end, and the temperature detection unit is used for detecting the temperature value of the electronic device, so that when the current value detected by the current detection unit is larger than a preset current value and the temperature value detected by the temperature detection unit is higher than the preset temperature value in the working process of the first radiator fan, namely, the electric energy provided by the thermoelectric generator is insufficient to drive the first radiator fan to sufficiently dissipate heat of the electronic device, the second radiator fan can be started at the moment so as to ensure the sufficient heat dissipation of the electronic device. Because the second cooling fan is not always started in the working process of the electronic equipment, the electronic equipment is started only when the electric energy provided by the thermoelectric generator is insufficient to drive the first cooling fan to sufficiently cool the electronic device, so that the sufficient cooling of the electronic device can be ensured, and the consumption of the electric energy of an external power supply is greatly reduced.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a heat dissipating fan arrangement of an electronic device (OLED display device) according to an embodiment of the present invention;
FIG. 2 is a top view of the electronic device of FIG. 1;
fig. 3 is a schematic layout diagram of a heat dissipation system of an electronic device according to an embodiment of the present invention;
fig. 4 is a flowchart of a heat dissipation control method of an electronic device according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; the specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In a first aspect, as shown in fig. 1 and fig. 2, an embodiment of the present invention provides an electronic device, including a housing 1, in which an electronic component 2 and a heat dissipation space 3 for dissipating heat from the electronic component 2 are disposed in the housing 1, as shown in fig. 1 and fig. 3, the electronic device further includes a heat dissipation system 4 and a power input terminal 5, the heat dissipation system 4 includes a first heat dissipation fan 41, a second heat dissipation fan 42, a thermoelectric generator 43 (e.g. a thermoelectric cell), a current detection unit 44, and a temperature detection unit 45, where the first heat dissipation fan 41 and the second heat dissipation fan 42 can supply air to the heat dissipation space 3, the first heat dissipation fan 41 is electrically connected to a power transmission terminal of the thermoelectric generator 43, the second heat dissipation fan 42 is electrically connected to the power input terminal 5, and the current detection unit 44 is used for detecting a magnitude of a current value output from the power transmission terminal of the thermoelectric generator 43, and the temperature detection unit 45 is used for detecting a magnitude of a temperature value of the electronic component 2.
The electronic device in the embodiment of the invention is not only an OLED display device (such as an OLED television, an OLED tablet computer, etc.), but also an electronic device with a casing 1 structure, such as a liquid crystal display device (such as a liquid crystal television, a liquid crystal display, etc.); the electronic device 2 is a device that generates heat in the electronic apparatus, such as a display panel in an OLED display device; backlight sources in liquid crystal display devices, and the like; the power input end 5 refers to an interface between the electronic equipment and an external power supply; the second heat dissipation fan 42 may be directly electrically connected to the power input terminal 5, or may be indirectly electrically connected to the power input terminal 5, for example, as shown in fig. 3, and the second heat dissipation fan 42 is electrically connected to the power input terminal 5 through the processing module 46.
In the electronic device provided by the embodiment of the invention, since the first cooling fan 41 is electrically connected with the power transmission end of the thermoelectric generator 43, the thermoelectric generator 43 can generate power according to the temperature difference of the surrounding environment, so as to supply power to the first cooling fan 41, and when the electronic device works, the first cooling fan 41 is startedTo supply air into the heat dissipation space 3 to accelerate the flow of air in the heat dissipation space 3, thereby ensuring sufficient heat dissipation of the electronic device 2. Since the electric energy consumed by the first cooling fan 41 is provided by the thermoelectric generator 43, the first cooling fan 41 does not need to consume the electric energy provided by an external power supply, and the power consumption of the electronic equipment is greatly reduced; since the second cooling fan 42 is electrically connected to the power input terminal 5, the current detecting unit 44 is configured to detect the magnitude of the current value I of the output current of the power transmission terminal of the thermoelectric generator 43, and the temperature detecting unit 45 is configured to detect the magnitude of the temperature value T of the electronic device 2, so that, as shown in fig. 4, during the operation of the first cooling fan 41, when the current value I detected by the current detecting unit 44 is greater than the preset current value I 0 (e.g. the preset current value I 0 May be the saturation current of the thermoelectric generator 43), and the temperature value T detected by the temperature detection unit 45 is higher than the preset temperature value T 0 When the electric energy provided by the thermoelectric generator 43 is insufficient to drive the first heat dissipation fan 41 to sufficiently dissipate heat of the electronic device 2, the second heat dissipation fan 42 may be turned on to ensure sufficient heat dissipation of the electronic device 2. Since the second cooling fan 42 is not always turned on during the operation of the electronic device, it is turned on only when the electric energy provided by the thermoelectric generator 43 is insufficient to drive the first cooling fan 41 to sufficiently cool the electronic device 2, so that not only can the sufficient cooling of the electronic device 2 be ensured, but also the consumption of the electric energy of the external power supply can be greatly reduced.
In the above embodiment, the second cooling fan 42 is not turned on only, for example, the second cooling fan 42 may be turned on when the current value I detected by the current detecting unit 44 is greater than the preset current value I 0 And the temperature value T detected by the temperature detection unit 45 is higher than the preset temperature T 0 The processing module 46 controls the automatic starting when the value is given, and the specific implementation manner is as follows:
as shown in fig. 3, the heat dissipation system 4 further includes a processing module 46, the processing module 46 is electrically connected to the power input terminal 5, and the second heat dissipation fan 42 is electrically connected to the processing module 46; the current detection unit 44 is further configured to feed back, to the processing module 46, an intensity value of a first electrical signal, where the first electrical signal is an electrical signal that is used to characterize a magnitude of a current value I of the output current of the power transmission end of the thermoelectric generator 43; the temperature detection unit 45 is further configured to feed back an intensity value of a second electrical signal to the processing module 46, where the second electrical signal is an electrical signal for representing the magnitude of the temperature value T of the electronic device 2; the processing module 46 is configured to output a third electrical signal to turn on the second cooling fan 42 when the intensity value of the first electrical signal fed back by the current detecting unit 44 is greater than a first preset intensity value and the intensity value of the second electrical signal fed back by the temperature detecting unit 45 is greater than a second preset intensity value.
Wherein, the first preset intensity value and the preset current value I 0 Corresponding, that is: when the current value I of the current output by the power transmission end of the thermoelectric generator 43 is a preset current value I 0 When the intensity value of the first electrical signal fed back by the current detection unit 44 to the processing module 46 is a first preset intensity value; a second preset intensity value and a preset temperature value T 0 Corresponding, that is: when the temperature T of the electronic device 2 is the preset temperature T 0 When the intensity value of the second electrical signal fed back by the temperature detection unit 45 to the processing module 46 is a second preset intensity value; the first electrical signal and the second electrical signal may be current signals or voltage signals, which are not particularly limited herein; the processing module 46 may be an MCU (micro control Unit; english full name: microcontroller Unit).
In addition, the second heat dissipation fan 42 may be a fan when the current value I detected by the current detection unit 44 is greater than the preset current value I 0 And the temperature value T detected by the temperature detection unit 45 is higher than the preset temperature value T 0 And is manually opened. Compared with the second cooling fan 42 which is manually started, the second cooling fan 42 is automatically started under the control of the processing module 46, so that the automation level of the electronic equipment is greatly improved, and the electronic equipment can be automatically started when the current value I detected by the current detection unit 44 is larger than the preset current value T 0 And the temperature value T detected by the temperature detection unit 45 is higher than the preset temperature value T 0 The second heat radiation fan 42 is ensured to be accurately turned on.
In the electronic device provided by the embodiment of the present invention, the specific composition of the processing module 46 is also not unique, for example, the processing module 46 may have the following composition structure: as shown in fig. 3, the processing module 46 includes a first comparator 461, a second comparator 462, a first reference source 463, a second reference source 464, an and operator 465, and a digital-to-analog converter 466; the first comparator 461, the second comparator 462, the AND operator 465 and the digital-to-analog converter 466 are all electrically connected with the power input terminal 5;
the first comparator 461 includes a first input end 4611, a second input end 4612, and a first output end 4613, the output end of the temperature detecting unit 45 is electrically connected to the first input end 4611, the first reference source 463 is electrically connected to the second input end 4612, and the first reference source 463 is configured to output a second electrical signal with an intensity value being a second preset intensity value to the second input end 4612; the first comparator 461 is configured to compare the intensity value of the second electrical signal fed back by the temperature detecting unit 45 with a second preset intensity value, and if the intensity value of the second electrical signal fed back by the temperature detecting unit 45 is greater than the second preset intensity value, the first output terminal 4613 of the first comparator 461 outputs a result of "1", that is, outputs a high-level digital signal; if the intensity value of the second electric signal fed back by the temperature detecting unit 45 is smaller than the second preset intensity value, the first output terminal 4613 of the first comparator 461 outputs a result of "0", that is, outputs a digital signal of low level;
the second comparator 462 includes a third input terminal 4621, a fourth input terminal 4622, and a second output terminal 4623, the output terminal of the current detection unit 44 is electrically connected to the third input terminal 4621, the second reference source 464 is electrically connected to the fourth input terminal 4622, and the second reference source 464 is configured to output a first electrical signal having an intensity value equal to a first preset intensity value to the fourth input terminal 4622; the second comparator 462 is configured to compare the intensity value of the first electrical signal fed back by the current detecting unit 44 with a first preset intensity value, and if the intensity value of the first electrical signal fed back by the current detecting unit 44 is greater than the first preset intensity value, the first output terminal 4613 of the second comparator 462 outputs a result of "1", that is, outputs a high-level digital signal; if the intensity value of the first electric signal fed back by the current detecting unit 44 is smaller than the first preset intensity value, the second output end 4623 of the second comparator 462 outputs a result of "0", that is, outputs a digital signal of low level;
the AND operator 465 includes a fifth input 4651, a sixth input 4652, and a third output 4653, the first output 4613 is electrically connected to the fifth input 4651, the second output 4623 is electrically connected to the sixth input 4652, the third output 4653 is electrically connected to an input of the digital-to-analog converter 466, and an output of the digital-to-analog converter 466 is electrically connected to the second radiator fan 42; the and operator 465 performs an and operation on the output results of the first and second comparators 461, 462, and if the output results of the first and second comparators 461, 462 are both "1", the output result of the third output terminal 4653 of the and operator 465 is also "1", and the digital-to-analog converter 466 performs a digital-to-analog conversion on the digital signal output from the and operator 465, and outputs a third electrical signal to turn on the second radiator fan 42.
In addition, the processing module 46 may also include a programmable controller (PLC), and the output end of the temperature detecting unit 45 and the output end of the current detecting unit 44 are respectively connected to the input end of the programmable controller, and the output end of the programmable controller is electrically connected to the second cooling fan 42. The output end of the programmable controller may also output a third electric signal to turn on the second cooling fan 42 when the intensity value of the first electric signal fed back by the current detecting unit 44 is greater than the first preset intensity value and the intensity value of the second electric signal fed back by the temperature detecting unit 45 is greater than the second preset intensity value.
In the embodiment in which the processing module 46 includes the first comparator 461, the second comparator 462, the first reference source 463, the second reference source 464, the and operator 465, and the digital-to-analog converter 466, the voltage signal output from the output terminal of the digital-to-analog converter 466 is generally weak, so that the voltage signal (i.e., the third electrical signal) output from the output terminal of the digital-to-analog converter 466 can drive the second cooling fan 42 with higher power, as shown in fig. 3, the processing module 46 further includes a Boost Regulator 467 (Boost Regulator), an input terminal of the Boost Regulator 467 is electrically connected to the output terminal of the digital-to-analog converter 466, and an output terminal of the Boost Regulator 467 is electrically connected to the second cooling fan 42. By providing the boost regulator 467, the voltage signal output by the digital-to-analog converter 466 can be boosted to drive the second heat dissipating fan 42 with larger power, so that more sufficient heat dissipation of the electronic device 2 can be further ensured.
As shown in fig. 3, the heat dissipation system 4 further includes a first heat conduction contact 47a and a second heat conduction contact 47b, wherein the first heat conduction contact 47a is in heat conduction connection with the cold end of the thermoelectric generator 43, and the second heat conduction contact 47b is in heat conduction connection with the hot end of the thermoelectric generator 43;
the positions of the first heat conductive contact 47a and the second heat conductive contact 47b are not unique, for example, the first heat conductive contact 47a and the second heat conductive contact 47b may be set as follows: as shown in fig. 3, the first heat conductive contact 47a is located outside the housing 1, the second heat conductive contact 47b is located in the heat dissipation space 3 and the electronic device 2 is in contact. In addition, the first heat conductive contact 47a and the second heat conductive contact 47b may also be provided as follows: the first heat conduction contact and the second heat conduction contact 47b are both located in the shell 1, the first heat conduction contact 47a is located outside the heat dissipation space 3, and the second heat conduction contact 47b is located in the heat dissipation space 3 and is in contact with the electronic device 2. In the embodiment in which the first heat conductive contact 47a is located outside the housing 1 and the second heat conductive contact 47b is located inside the heat dissipation space 3 and the electronic device 2 is in contact with the electronic device 2, compared with the embodiment in which the first heat conductive contact 47a and the second heat conductive contact 47b are located inside the housing 1, the temperature difference between the outside of the housing 1 and the electronic device 2 is greater, and therefore, the thermoelectric generator 43 can generate a higher electromotive force to drive the first heat dissipation fan 41 with a higher power, so that more sufficient heat dissipation of the electronic device 2 can be further ensured.
The first heat conducting contact 47a and the second heat conducting contact 47b can be made of resin magnetic paste, and the first heat conducting contact 47a and the second heat conducting contact 47b can be fixed more firmly due to good viscosity of the resin magnetic paste; meanwhile, the resin magnetic paste has better heat conductivity, and is beneficial to transmitting heat to the thermoelectric generator 43.
In order to ensure that the heat dissipation of the electronic device 2 is more sufficient, as shown in fig. 3, the number of the first heat dissipation fans 41, the thermoelectric generator 43, the first heat conduction contacts 47a and the second heat conduction contacts 47b is multiple, the first heat dissipation fans 41 can supply air to the heat dissipation space 3, and the power transmission end of each thermoelectric generator 43 is electrically connected with at least one first heat dissipation fan 41 (the power transmission end of the thermoelectric generator 43 is electrically connected with one first heat dissipation fan 41 in the drawing); each first heat-conducting contact 47a is located outside the housing 1 and is in heat-conducting connection with the cold end of the corresponding thermoelectric generator 43; each second heat conduction contact 47b is located in the heat dissipation space 3 and is in contact with the electronic device 2, and each second heat conduction contact 47b is in heat conduction connection with the hot end of the corresponding thermoelectric generator 43; the number of the current detecting units 44 is plural, and each current detecting unit 44 is configured to detect a current value of the output current of the power transmission terminal of the thermoelectric generator 43 corresponding to the current detecting unit 44. When the plurality of first cooling fans 41 are turned on, the plurality of thermoelectric generators 43 can supply power to the plurality of first cooling fans 41, and the plurality of first cooling fans 41 uniformly supply air in the cooling space 3, so that the cooling of the electronic device 2 can be ensured to be more sufficient.
After the plurality of first heat dissipation fans 41 are turned on, if the current value I detected by one current detection unit 44 is greater than the preset current value I 0 And the temperature value T detected by the temperature detection unit 45 is higher than the preset temperature value T 0 At this time, the second heat dissipation fan 42 can be turned on, so that the heat dissipation of the electronic device 2 is ensured to be sufficient while the power consumption of the electronic device is further reduced;
for example, as shown in fig. 3, the first comparator 461, the second comparator 462, the first reference source 463, the second reference source 464, and the sum operator 465 are plural (2 are shown in the figure), so long as the current value I detected by one of the current detecting units 44 is greater than the preset current value I 0 And the temperature value T detected by the temperature detection unit 45 is higher than the preset temperature value T 0 This causes the third output 4653 of one of the and operators 465 to output "1", and the digital-to-analog converter 466 outputs a third electrical signal to turn on the second radiator fan 42 after digital-to-analog converting the digital signal output from the and operator 465.
In the electronic device provided by the embodiment of the present invention, the location of the thermoelectric generator 43 is not unique, for example, as shown in fig. 3, the thermoelectric generator 43 may be located inside the housing 1 and outside the heat dissipation space 3, where the thermoelectric generator 43 is located outside the heat dissipation space 3 to avoid the influence of the heat emitted by the electronic device 2 on the normal power generation of the thermoelectric generator 43. In addition, the thermoelectric generator 43 may be located outside the housing 1, such as fixed to an outer wall of the housing 1. Compared with the thermoelectric generator 43 positioned outside the shell 1, the thermoelectric generator 43 is positioned in the shell 1 and outside the heat dissipation space 3, so that the structure of the electronic equipment is more compact, and the thermoelectric generator 43 is prevented from occupying the space outside the shell 1.
In the electronic device provided by the embodiment of the present invention, the structural composition of the temperature detection unit 45 is also not unique, for example, as shown in fig. 3, the temperature detection unit 45 may include a temperature sensor 451 and a third heat conduction contact 452, where the temperature sensor 451 includes a temperature sensing portion 4511, and the third heat conduction contact 452 is located in the heat dissipation space 3 and is in contact with the electronic device 2, and the third heat conduction contact 452 is in heat conduction connection with the temperature sensing portion 4511. In addition, the temperature detection unit 45 may also include a temperature sensor 451, the temperature sensor 451 being located within the heat dissipation space 3 and a temperature sensing portion 4511 of the temperature sensor 451 being in contact with the electronic device 2. Compared to the embodiment in which the temperature detecting unit 45 may also include the temperature sensor 451, the temperature sensor 451 is located in the heat dissipation space 3, and the temperature sensing portion 4511 of the temperature sensor 451 contacts the electronic device 2, the temperature detecting unit 45 may include the embodiment in which the temperature sensor 451 and the third heat conducting contact 452, because the third heat conducting contact 452 transfers the temperature of the electronic device 2 to the temperature sensing portion 4511 of the temperature sensor 451, the temperature sensor 451 is prevented from being disposed in the heat dissipation space 3, and the heat emitted by the electronic device 2 affects other elements of the temperature sensor 451, so that the service life of the temperature sensor 451 may be prolonged.
During operation of the electronic device, the temperature distribution of the electronic component 2 is generally uneven, the temperature of some portions is higher, and the temperature of some portions is lower, and if the temperature detecting unit 45 includes only one third heat conducting contact 452, one third heat conducting contact 452 can only contact one portion of the electronic component 2, and the temperature transmitted to the temperature sensing portion 4511 of the temperature sensor 451 is slightly different from the temperature of the whole electronic component 2. In order to accurately transfer the temperature of the whole electronic device 2 through the third heat conductive contacts 452, as shown in fig. 3, the number of the third heat conductive contacts 452 is plural, and the plurality of third heat conductive contacts 452 are all located in the heat dissipation space 3 and respectively contact different parts of the electronic device 2, so that the plurality of third heat conductive contacts 452 can transfer the temperatures of different parts of the electronic device 2 to the temperature sensing part 4511 of the temperature sensor 451, and the temperature of the whole electronic device 2 can be accurately reflected through comprehensive processing, such as averaging.
In the electronic device provided by the embodiment of the present invention, the current detection unit 44 may include a current sensor, where an input end of the current sensor is electrically connected to the power transmission end, and an output end of the current sensor is electrically connected to the processing module 46. The current sensor can detect the current value of the current output by the power transmission end of the thermoelectric generator 43, and feed back the current value to the processing module 46.
In a second aspect, an embodiment of the present invention provides a heat dissipation control method of an electronic device as described in the first aspect, including the following steps: as shown in figure 4 of the drawings,
the first radiator fan 41 is turned on;
during the operation of the first heat radiation fan 41, when the current value I detected by the current detection unit 44 is greater than the preset current value I 0 And the temperature value T detected by the temperature detection unit 45 is higher than the preset temperature value T 0 When the second heat radiation fan 42 is turned on;
the main body for performing the above steps may be the processing module 46 or a person, which is not limited herein.
The technical problems and the beneficial effects solved by the heat dissipation control method of the electronic device provided by the embodiment of the invention are the same as those of the electronic device provided in the first aspect, and are not repeated here.
After the second heat dissipation fan 42 is turned on, when the current value I detected by the current detection unit 44 is less than or equal to the preset current value I 0 And/or the temperature value T detected by the temperature detection unit 45 is equal to or lower than a preset valueTemperature value T 0 When the second heat radiation fan 42 is turned off.
Features of the embodiment of the heat dissipation control method of the electronic device that are the same as or similar to those of the product embodiment of the electronic device may be specifically referred to the description of the product embodiment of the electronic device, and are not repeated herein.
The foregoing is merely illustrative embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think about variations or substitutions within the technical scope of the present invention, and the invention should be covered. Therefore, the protection scope of the invention is subject to the protection scope of the claims.
Claims (11)
1. The electronic equipment comprises a shell, wherein an electronic device and a heat dissipation space for heat dissipation of the electronic device are arranged in the shell, and the electronic equipment is characterized by further comprising a heat dissipation system and a power input end, wherein the heat dissipation system comprises a first heat dissipation fan, a second heat dissipation fan, a thermoelectric generator, a current detection unit and a temperature detection unit, the first heat dissipation fan and the second heat dissipation fan can supply air to the heat dissipation space, the first heat dissipation fan is electrically connected with a power transmission end of the thermoelectric generator, the second heat dissipation fan is electrically connected with the power input end, the current detection unit is used for detecting the magnitude of a current value of an output current of the power transmission end, and the temperature detection unit is used for detecting the magnitude of a temperature value of the electronic device;
the thermoelectric generator generates power according to the temperature difference of the surrounding environment and supplies power to the first cooling fan; when the electronic equipment works, the first cooling fan is started to supply air into the cooling space; and in the working process of the first cooling fan, when the current value detected by the current detection unit is larger than a preset current value and the temperature value detected by the temperature detection unit is higher than a preset temperature value, starting the second cooling fan.
2. The electronic device of claim 1, wherein the heat dissipation system further comprises a processing module electrically connected to the power input, the second heat dissipation fan electrically connected to the processing module;
the current detection unit is further used for feeding back an intensity value of a first electric signal to the processing module, wherein the first electric signal is an electric signal used for representing the magnitude of a current value of the output current of the power transmission end; the temperature detection unit is further used for feeding back an intensity value of a second electric signal to the processing module, wherein the second electric signal is an electric signal used for representing the temperature value of the electronic device;
the processing module is used for outputting a third electric signal to start the second cooling fan when the intensity value of the first electric signal fed back by the current detection unit is larger than a first preset intensity value and the intensity value of the second electric signal fed back by the temperature detection unit is larger than a second preset intensity value.
3. The electronic device of claim 2, wherein the processing module comprises a first comparator, a second comparator, a first reference source, a second reference source, an and operator, and a digital-to-analog converter; the first comparator, the second comparator, the AND arithmetic unit and the digital-to-analog converter are all electrically connected with the power input end;
the first comparator comprises a first input end, a second input end and a first output end, the output end of the temperature detection unit is electrically connected with the first input end, the first reference source is electrically connected with the second input end, and the first reference source is used for outputting the second electric signal with the intensity value being the second preset intensity value to the second input end;
the second comparator comprises a third input end, a fourth input end and a second output end, the output end of the current detection unit is electrically connected with the third input end, the second reference source is electrically connected with the fourth input end, and the second reference source is used for outputting the first electric signal with the intensity value being the first preset intensity value to the fourth input end;
the AND arithmetic unit comprises a fifth input end, a sixth input end and a third output end, wherein the first output end is in electric current connection with the fifth input end, the second output end is electrically connected with the sixth input end, the third output end is electrically connected with the input end of the digital-to-analog converter, and the output end of the digital-to-analog converter is electrically connected with the second cooling fan.
4. The electronic device of claim 3, wherein the processing module further comprises a boost regulator having an input electrically coupled to an output of the digital-to-analog converter, the output of the boost regulator electrically coupled to the second cooling fan.
5. The electronic device of any one of claims 1-4, wherein the heat dissipation system further comprises a first heat conduction contact and a second heat conduction contact, the first heat conduction contact is located outside the housing and is in heat conduction connection with the cold end of the thermoelectric generator, the second heat conduction contact is located in the heat dissipation space and is in contact with the electronic component, and the second heat conduction contact is in heat conduction connection with the hot end of the thermoelectric generator.
6. The electronic device of claim 5, wherein the number of the first heat dissipation fans, the thermoelectric generator, the first heat conduction contacts and the second heat conduction contacts is plural, the plural first heat dissipation fans can supply air to the heat dissipation space, and the power transmission end of each thermoelectric generator is electrically connected with at least one first heat dissipation fan; each first heat conduction contact is positioned outside the shell and is in heat conduction connection with the cold end of the corresponding thermoelectric generator; each second heat conduction contact is positioned in the heat dissipation space and is in contact with the electronic device, and each second heat conduction contact is in heat conduction connection with the corresponding hot end of the thermoelectric generator; the number of the current detection units is multiple, and each current detection unit is used for detecting the current value of the output current of the power transmission end corresponding to the current detection unit.
7. The electronic device of claim 5, wherein the thermoelectric generator is located within the housing and outside the heat dissipation space.
8. The electronic device according to any one of claims 1 to 4, wherein the temperature detection unit includes a temperature sensor and a third heat conduction contact, the temperature sensor includes a temperature sensing portion, the third heat conduction contact is located in the heat dissipation space and is in contact with the electronic component, and the third heat conduction contact is in heat conduction connection with the temperature sensing portion.
9. The electronic device of claim 8, wherein the number of third heat conductive contacts is a plurality, and wherein the plurality of third heat conductive contacts are each located within the heat dissipation space and each contact a different portion of the electronic device.
10. The electronic device according to any one of claims 1 to 4, wherein the current detection unit includes a current sensor, an input end of the current sensor is electrically connected to the power transmission end, and an output end of the current sensor is electrically connected to the processing module.
11. A heat dissipation control method of an electronic device as defined in any one of claims 1 to 10, comprising the steps of:
starting the first cooling fan;
and in the working process of the first cooling fan, when the current value detected by the current detection unit is larger than a preset current value and the temperature value detected by the temperature detection unit is higher than a preset temperature value, starting the second cooling fan.
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| TWM589871U (en) * | 2019-04-15 | 2020-01-21 | 俊華電子企業股份有限公司 | Programmable long-range wireless remote |
| CN112996341A (en) * | 2019-12-13 | 2021-06-18 | 北京小米移动软件有限公司 | Heat dissipation assembly and electronic equipment |
| CN114554804A (en) * | 2022-03-09 | 2022-05-27 | 联想(北京)有限公司 | Heat dissipation system and electronic equipment |
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