CN113365481B - Backflow prevention method and device applied to heat dissipation equipment and heat dissipation system - Google Patents

Backflow prevention method and device applied to heat dissipation equipment and heat dissipation system Download PDF

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Publication number
CN113365481B
CN113365481B CN202110727127.3A CN202110727127A CN113365481B CN 113365481 B CN113365481 B CN 113365481B CN 202110727127 A CN202110727127 A CN 202110727127A CN 113365481 B CN113365481 B CN 113365481B
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fan
backflow prevention
current value
backflow
electromagnetic assembly
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CN113365481A (en
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田颖
曹凯
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Xian Yep Telecommunication Technology Co Ltd
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Xian Yep Telecommunication Technology Co Ltd
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
    • H05K7/20209—Thermal management, e.g. fan control
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
    • H05K7/20136—Forced ventilation, e.g. by fans
    • H05K7/20145—Means for directing air flow, e.g. ducts, deflectors, plenum or guides
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
    • H05K7/20136—Forced ventilation, e.g. by fans
    • H05K7/2019—Fan safe systems, e.g. mechanical devices for non stop cooling
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)

Abstract

The invention discloses a backflow prevention method and device applied to heat dissipation equipment and a heat dissipation system. The heat dissipation device comprises at least two fans arranged side by side and a backflow prevention sheet of a magnetic material arranged corresponding to the fans; the backflow prevention method comprises the following steps: acquiring the working state of the fan; setting operation parameters of the electromagnetic assembly according to the working state; and sending the operation parameters to the electromagnetic assembly so that the electromagnetic assembly controls the opening and closing states of the backflow prevention sheets to be matched with the working states of the fans based on the operation parameters. The invention enables the backflow prevention sheet to adapt to various working states of the fan of the heat radiation device through controlling the electromagnetic assembly, can ensure that the fan can supply air normally no matter in a normal air-blowing or air-exhausting state, and can ensure that the backflow prevention sheet forms a closure for the fan once the air-blowing or air-exhausting failure occurs, and no air flow backflow occurs, thereby ensuring the heat radiation effect of the heat radiation device.

Description

Backflow prevention method and device applied to heat dissipation equipment and heat dissipation system
Technical Field
The present invention relates to the field of anti-backflow heat dissipation technologies, and in particular, to an anti-backflow method and apparatus for a heat dissipation device, and a heat dissipation system.
Background
When the heat dissipation device such as the fan unit works, a plurality of fans work simultaneously to ensure the heat dissipation effect, and the working mode of executing air supply on one side of an air supply opening of the fans generally comprises air supply and air suction.
When any fan fails and stops running, the rest fans still normally execute air supply, and at the moment, the pressure at the air outlet of the failed fan is larger than that at the air inlet because the failed fan cannot generate thrust, so that air flows back to the air inlet from the air outlet of the failed fan. The air flow backflow can increase wind resistance, so that heat dissipation of the whole electric fan unit cannot be guaranteed, and other adverse effects such as noise are brought.
In order to solve the above problems, a device such as a backflow preventing sheet is usually provided at an air outlet of a heat dissipating device. However, in order to adapt to the working mode of the heat dissipating object, in practice, the fan of the heat dissipating device needs to be continuously adjusted to the working mode, that is, the air supply mode is switched between air supply and air suction, and the backflow preventing device separately provided for one air supply mode needs to be replaced, installed and set in the other air supply mode, which causes inconvenience.
Disclosure of Invention
The invention aims to overcome the defects that in the prior art, a backflow prevention device has small compatibility with heat dissipation equipment and is not flexible to set, and provides a backflow prevention method and device and a heat dissipation system.
The invention solves the technical problems by the following technical scheme:
the invention provides a backflow preventing method applied to heat dissipating equipment, which comprises at least two fans arranged side by side and backflow preventing sheets of magnetic materials arranged corresponding to the fans; the backflow prevention method comprises the following steps:
acquiring the working state of the fan;
setting operation parameters of the electromagnetic assembly according to the working state;
and sending the operation parameters to the electromagnetic assembly so that the electromagnetic assembly controls the opening and closing states of the backflow prevention sheets to be matched with the working states of the fans based on the operation parameters.
Preferably, the working state includes a normal state and a failure state;
the step of sending the operation parameter to the electromagnetic assembly so that the electromagnetic assembly controls the opening and closing state of the backflow prevention sheet to be matched with the working state of the fan based on the operation parameter specifically comprises the following steps:
if the working state is a normal state, the electromagnetic assembly is used for controlling the backflow prevention sheet to be opened according to the operation parameters;
and if the working state is a failure state, the electromagnetic assembly is used for controlling the backflow prevention sheet to be closed according to the operation parameters.
Preferably, the operating parameter comprises a current parameter;
the step of setting the operation parameters of the electromagnetic assembly according to the working state specifically comprises the following steps:
if the working state is a normal state, setting the current to be zero or the current direction to be a first direction;
if the working state is a failure state, setting the current direction as a second direction;
wherein the first direction and the second direction are opposite, and the current in the first direction is used for making the electromagnetic assembly generate magnetic force which is repulsive to the backflow preventing sheet; the current in the second direction is used for enabling the electromagnetic assembly to generate magnetic force attracted to the backflow prevention sheet.
Preferably, the normal state includes normal blowing and normal exhausting; the failure state comprises blowing failure and exhausting failure; the opening direction of the backflow preventing sheet is consistent with the blowing direction of the fan;
the step of setting the operation parameters of the electromagnetic assembly according to the working state comprises the following steps:
setting a current value of the electromagnetic assembly according to the working state;
if the working state is normal blowing, setting the current value as a first current value;
if the working state is normal air suction, setting the current value as a second current value;
if the working state is the failure of blowing, setting the current value as a third current value;
if the working state is that the air draft fails, setting the current value as a fourth current value;
wherein the first current value is less than the second current value; the third current value is less than the fourth current value.
Preferably, the step of setting the operation parameters of the electromagnetic assembly according to the working state specifically includes:
the first current value set when the backflow preventing sheet is located above the fan is greater than the first current value set when the backflow preventing sheet is located below the fan;
the second current value set when the backflow preventing sheet is located above the fan is greater than the second current value set when the backflow preventing sheet is located below the fan;
the third current value set when the backflow preventing sheet is located above the fan is smaller than the third current value set when the backflow preventing sheet is located below the fan;
the fourth current value set when the backflow preventing sheet is located above the fan is smaller than the fourth current value set when the backflow preventing sheet is located below the fan.
The invention also provides a backflow preventing device applied to the heat dissipating equipment, the heat dissipating equipment comprises at least two fans arranged side by side and backflow preventing sheets of magnetic materials arranged corresponding to the fans, and the backflow preventing device comprises a controller and an electromagnetic assembly;
the electromagnetic assemblies are arranged at the edges of two sides of the air supply opening of the fan; the controller is electrically connected with the electromagnetic assembly;
the controller is used for executing the backflow prevention method applied to the heat dissipating device, so that the opening and closing states of the backflow prevention pieces are matched with the working states of the fans through controlling the electromagnetic assembly.
Preferably, the fan includes a PIN interface, and the controller is configured to read the PIN interface to obtain the working state.
Preferably, the backflow preventing device further comprises a gravity sensing device arranged on the fan, and the gravity sensing device is used for detecting the direction of an air supply outlet of the fan and sending the direction of the air supply outlet to the controller;
the controller is also used for setting current parameters of the electromagnetic assembly according to the working state and the orientation of the air supply outlet.
Preferably, the backflow preventing device further comprises a wind force detecting device, which is used for detecting a first wind force value of an air supply opening of the fan and sending the first wind force value to the controller;
the controller is also configured to set an operating parameter based on the operating state and the first wind force value.
Preferably, the backflow preventing device further comprises a connecting part;
the middle shaft position of the air supply opening of each fan is provided with one connecting part;
the electromagnetic assemblies are respectively arranged at the edges of the two sides of the air supply opening of each fan;
each connecting part is movably connected with two backflow prevention sheets, and the two backflow prevention sheets turn over by taking the connecting part as an axis so as to be opened or closed.
The invention also provides a heat dissipation system which comprises heat dissipation equipment and the backflow prevention device;
the heat dissipation device comprises at least two fans arranged side by side and a backflow prevention sheet of magnetic material arranged corresponding to the fans.
The invention has the positive progress effects that: the invention provides a backflow prevention method and device applied to heat dissipation equipment and a heat dissipation system, so that a backflow prevention sheet is suitable for various working states of a fan of the heat dissipation equipment, normal air supply of the fan can be ensured under normal air supply or air exhaust states, and once the air supply or air exhaust failure occurs, the backflow prevention sheet can be ensured to form a closed state for the fan, and air flow backflow can not occur, thereby ensuring the heat dissipation effect of the heat dissipation equipment.
Drawings
Fig. 1 is a flowchart of an anti-backflow method applied to a heat dissipating device in embodiment 1 of the present invention.
Fig. 2A is a schematic diagram illustrating an open/close state of the backflow preventing sheet corresponding to normal blowing of the fan in embodiment 1 of the present invention.
Fig. 2B is a schematic diagram illustrating an open/close state of the backflow preventing sheet corresponding to the normal air suction of the fan in embodiment 1 of the present invention.
Fig. 2C is a schematic diagram illustrating an open/close state of the backflow prevention sheet corresponding to a failure state of the fan in embodiment 1 of the present invention.
Fig. 3A is a schematic diagram illustrating an open/close state of the backflow preventing sheet above the fan in embodiment 1 of the present invention.
Fig. 3B is a schematic diagram illustrating an open/close state of the backflow preventing sheet located below the fan in embodiment 1 of the present invention.
Fig. 4 is an overall side view of a heat dissipating device and a backflow preventing device applied to the heat dissipating device in embodiment 2 of the present invention.
Fig. 5 is an overall front view of a heat dissipating device and a backflow preventing device applied to the heat dissipating device in embodiment 2 of the present invention.
Fig. 6 is an overall plan view of a heat dissipating device and a backflow preventing device applied to the heat dissipating device in embodiment 2 of the present invention.
Fig. 7 is a schematic diagram of a heat dissipation system in embodiment 3 of the present invention.
Fig. 8 is a schematic diagram illustrating switching of the open/close state of the backflow prevention sheet in embodiment 3 of the present invention.
Detailed Description
The invention is further illustrated by means of the following examples, which are not intended to limit the scope of the invention.
Example 1
The embodiment provides a backflow prevention method applied to heat dissipation equipment, wherein the heat dissipation equipment comprises at least two fans arranged side by side and backflow prevention sheets of magnetic materials arranged corresponding to the fans. Referring to fig. 1, the backflow prevention method includes the steps of:
s1, acquiring the working state of a fan;
s2, setting operation parameters of the electromagnetic assembly according to the working state;
s3, sending the operation parameters to the electromagnetic assembly so that the electromagnetic assembly controls the opening and closing states of the backflow prevention sheets to be matched with the working states of the fans based on the operation parameters.
In this embodiment, the heat dissipation device is specially configured for dissipating heat of other main devices with larger power and higher heat productivity, and may be a fan unit. The heat sink device may be self-contained, i.e., integrally formed, with the body device or may be attached to the body device as a separate device. Comparatively, the latter has more application scenes, so that the heat dissipation device can be based on main devices with different power, structures and materials; flexibly allocating the number of fans, the positions of the fans and the materials of the fans; the energy consumption is controlled while the better heat dissipation effect is obtained.
In view of the back flow prevention method according to the present embodiment, the heat dissipating device includes at least two fans disposed side by side. For the working state of the fan, the following definitions are made in the embodiments of the present application: normal state-meaning that the fan is performing normal air supply, wherein the normal air supply (i.e. air supply in a direction away from the main body device, typically as an exhaust design for the main body device) and normal air extraction (i.e. air supply in a direction opposite to the normal air supply, typically for ventilating the interior of the main body device) are included in the direction of the air supply. And a failure state corresponding to the normal state, that is, the fan stops rotating and no more air is supplied. The failure state also comprises a blowing failure and an exhaust failure, wherein the blowing failure refers to that the fan is in a failure state and other fans are normally blown at the same time; and the failure of the air draft means that the fan is in a failure state, and the other fans are in normal air draft.
When one fan fails and no air is supplied, at least one other fan still supplies air normally, and backflow prevention phenomenon is generated. The specific principle can be referred to in the background art, and is also a common knowledge in the aerodynamics, and the description of this embodiment is omitted. Accordingly, the side-by-side arrangement of the fans in the embodiments is not a limitation, but is used to illustrate the application scenario and premise of the backflow prevention method of the present embodiment, that is, backflow is generated, in most cases, due to the side-by-side arrangement of the fans.
Most importantly, as a technical implementation guarantee of the embodiment, the fans of the heat dissipation device are correspondingly provided with the backflow prevention sheets of the magnetic material, and the backflow prevention method of the embodiment is specifically realized based on the control of the backflow prevention sheets. Those skilled in the art will appreciate that the magnetic material backflow preventing sheet may be partially or wholly made of magnetic material or may be made of non-magnetic material, and may have a magnetic core material accessory attached to the surface, such as a magnetic accessory interlayer, or the like. And for each fan, a corresponding backflow preventing sheet is provided. On the premise that the working state of the fan is obtained in the step S1, the electromagnetic assembly is arranged in the step S2 according to the working state, and then the operation parameters are sent to the electromagnetic assembly in the step S3, so that the electromagnetic assembly controls the opening and closing states of the backflow prevention sheets based on the operation parameters to be matched with the working state of the fan.
Step S1, the working state (normal or invalid, blowing or exhausting) of the fan can be judged by directly reading a PIN foot signal of the fan through the controller; the judgment can be directly carried out through a peripheral wind power sensing system; of course, the acquisition of the operating state includes, but is not limited to, the two modes described above.
For step S2, the present embodiment makes the electromagnetic assembly emit magnetic force based on the control of the operation parameters of the electromagnetic assembly, and the electromagnetic assembly can control the opening and closing of the backflow prevention sheet because the backflow prevention sheet is made of magnetic material. The method of this control is not limited to the specific position of the electromagnetic assembly, and the electromagnetic assembly only needs to be able to meet the two requirements of receiving the corresponding control signal, and directly affecting and controlling the anti-backflow sheet through magnetic force.
In step S3, considering that the failure of the fan is only an accidental event with low relative probability, in most cases, the fan set is in a normal working state, and as described in the background art, the blowing direction of the fan set is directly changed or switched under the condition that the setting position of the fan set is unchanged. Therefore, the opening and closing states of the backflow prevention sheets corresponding to the fans are set according to the corresponding requirements of various working states of the fans. For example, if the fan fails, it is necessary to close its supply port to prevent backflow. If the device works normally, the normal operation of blowing or exhausting is required to be ensured.
According to the embodiment, the backflow prevention piece is set to be the magnetic device, the opening and closing states of the backflow prevention piece are matched with the working states of the fan through the control of the operation parameters of the electromagnetic assembly, the problem that the existing backflow prevention device cannot keep the backflow prevention effect after the air supply direction of the fan is changed, the backflow prevention device needs to be reassembled at other positions of the fan to ensure the backflow prevention effect is solved, after the backflow prevention piece is installed in place at one time, all possible working states of the fan are matched, and therefore the applicability of the backflow prevention device is greatly improved while the backflow prevention effect is ensured.
In the present embodiment, a control method of the electromagnetic component is further described in terms of a normal state and a failure state, respectively, according to an operation state.
If the working state is normal, in step S3, the electromagnetic assembly is used for controlling the opening of the backflow preventing sheet according to the operation parameters; if the working state is the failure state, the electromagnetic assembly is used for controlling the backflow prevention sheet to be closed according to the operation parameters in the step S3.
Referring to fig. 2A and 2B, normal blowing and normal exhausting are performed in a normal state, and at this time, the operation parameters of the electromagnetic assembly are controlled to keep the backflow preventing sheet open. While fig. 2C shows that when the operating state is a failure state, the operation parameters of the electromagnetic assembly need to be controlled to keep the backflow preventing sheet closed, thereby preventing backflow.
The embodiment further illustrates a control manner of the anti-backflow method of the embodiment on the operation parameters of the electromagnetic assembly when the working state of a certain fan is a normal state and a failure state, so that the opening and closing state of the anti-backflow sheet can meet the requirement of backflow prevention.
As a preferred embodiment, the operation parameter in the above embodiment may be a current parameter. The step S2 is specifically realized by the following steps:
a1. if the working state is a normal state, setting the current to be zero or the current direction to be a first direction;
a2. if the working state is a failure state, setting the current direction as a second direction;
the first direction and the second direction are opposite, and the current in the first direction makes the electromagnetic assembly generate magnetic force which is repulsive to the backflow preventing sheet; the current in the second direction is used for enabling the electromagnetic assembly to generate magnetic force attracted to the backflow prevention sheet.
According to the embodiment, the opening and closing states of the backflow prevention sheets corresponding to the fans are set according to the corresponding requirements of various working states of the fans, so that backflow prevention effects and normal air supply are guaranteed at the same time, specifically, for the scene a1, the electromagnetic assembly generates magnetic force which is repulsed with the backflow prevention sheets by current in the first direction, and therefore the backflow prevention sheets can be opened to guarantee normal work no matter whether the fans are in air blowing or air exhausting. Referring to fig. 2A and 2C, the open-close state of the backflow prevention sheet is respectively a normal state and a failure state, and the open-close state is opposite, so that the backflow prevention sheet needs to be set to be in opposite current directions, and of course, the operation parameter can be set to be zero current under certain conditions, so that the backflow prevention sheet can be kept open by wind power.
On the contrary, when the fan is in a failure state, the backflow prevention sheet is ensured to form a seal for the air supply outlet of the backflow prevention sheet through a certain external force; the current in the second direction generates magnetic attraction force corresponding to the repulsive magnetic force generated by the current in the first direction, so that the backflow prevention sheet can be ensured to be closed.
The embodiment further limits the control mode of the current parameters of the electromagnetic assembly when the working state is the normal state and the failure state respectively, and can ensure that the whole fan set keeps normal operation under two situations of backflow prevention and normal air supply through the setting of the current parameters.
As a preferred embodiment, on the basis of the above embodiment, the normal state is further divided into normal blowing and normal air suction; the failure state is divided into a blowing failure and an exhausting failure, and the parameter setting of the control method is described.
In this embodiment, the opening direction of the backflow preventing sheet is set to coincide with the blowing direction of the fan. It will be understood by those skilled in the art that if it is set to be consistent with the direction of exhaust, the implementation principle is the same, and the implementation process is corresponding, so that the description will not be repeated.
Step S2, specifically, according to the working state, setting the current value of the electromagnetic assembly as follows:
a3. if the working state is normal blowing, setting the current value as a first current value;
a4. if the working state is normal air suction, setting the current value as a second current value;
a5. if the working state is the failure of blowing, setting the current value as a third current value;
a6. if the working state is that the air draft fails, setting the current value as a fourth current value;
wherein the first current value is less than the second current value; the third current value is less than the fourth current value.
In the present embodiment, the principle and meaning of the current value are that the magnitude of the magnetic attraction (repulsion) force is changed according to the absolute value of the current value, so that the fan in the four working states is adapted.
For the scenes a3 and a4, the backflow prevention sheet needs to be opened, as described above, the blowing direction is consistent with the opening direction of the backflow prevention sheet and the air suction direction is consistent with the closing direction of the backflow prevention sheet, so that the opening of the backflow prevention sheet can be maintained only by the magnetic repulsive force in the scene a3 and less than that in the scene a4 based on the mechanical principle. Similarly, in the failure state, when the blowing fails, the backflow preventing piece corresponding to the failed fan is attached to the air supply port of the fan under the backflow action of the fan which works normally, so that the third current value in the a5 scene is smaller than the fourth current value in the a6 scene.
The embodiment further realizes that the backflow prevention sheet is adapted to the working state of the fan through the control of the current value under each working state, so that the power consumption and the heat emission can be saved on the premise of ensuring heat dissipation, and the integral heat dissipation effect is also facilitated.
As a preferred embodiment, this embodiment considers the application scenario of the fan and the backflow prevention sheet when they are arranged relatively vertically, and further describes the operation parameter settings corresponding to the fan operation states in the scenarios of the respective relative arrangement positions.
a7. The first current value set when the backflow preventing sheet is positioned above the fan is larger than the first current value set when the backflow preventing sheet is positioned below the fan;
a8. the second current value set when the backflow preventing sheet is positioned above the fan is larger than the second current value set when the backflow preventing sheet is positioned below the fan;
a9. the third current value set when the backflow preventing sheet is positioned above the fan is smaller than the third current value set when the backflow preventing sheet is positioned below the fan;
a10. the fourth current value set when the backflow preventing sheet is located above the fan is smaller than the fourth current value set when the backflow preventing sheet is located below the fan.
For the comparison of the two scenes of a7, when the backflow prevention piece is positioned below the fan, the gravity of the backflow prevention piece can generate resultant force with magnetic force in the opening direction of the backflow prevention piece to jointly open the backflow prevention piece, otherwise, when the backflow prevention piece is positioned above the fan, the gravity can generate resultant force in the closing direction of the backflow prevention piece. Therefore, the first current value set when the backflow prevention sheet is positioned above the fan is larger than the first current value set when the backflow prevention sheet is positioned below the fan, and the backflow prevention sheet is used for resisting the influence of gravity of the fire backflow sheet.
Also, for the second current value set at the time of normal air extraction, the second current value set when the backflow prevention sheet is located above the fan is larger than the second current value set when the backflow prevention sheet is located below the fan based on the same principle as described above in the two scenes of a8.
For the two scenes of a9, when the backflow prevention piece is positioned below the fan, the gravity of the backflow prevention piece can generate resultant force with magnetic force in the opening direction of the backflow prevention piece to jointly open the backflow prevention piece, otherwise, when the backflow prevention piece is positioned above the fan, the gravity can generate resultant force in the closing direction of the backflow prevention piece. Therefore, the third current value set when the backflow prevention sheet is positioned below the fan is larger than the third current value set when the backflow prevention sheet is positioned above the fan, and the backflow prevention sheet is used for being attracted and kept closed against the influence of gravity of the fire protection backflow sheet.
Similarly, for the fourth current value set during normal air extraction, in the two scenes of a10, the fourth current value set when the backflow prevention sheet is positioned below the fan is larger than the fourth current value set when the backflow prevention sheet is positioned above the fan, so that the gravity influence is counteracted, and the backflow prevention sheet is kept closed.
Referring to fig. 3A and 3B, the second and third fans from the left are both normally blowing, i.e. the a7 scenario described above. The backflow preventing sheet of fig. 3A is located above the fan, and the backflow preventing sheet of fig. 3B is located below the fan, and the first current value set in fig. 3A needs to be greater than the first current value set in fig. 3B to "jack up" the backflow preventing sheet to keep normal blowing.
On the contrary, when the first fan from the left is in the failed state of blowing, i.e. the above-mentioned a9 scenario, since the backflow preventing sheet in fig. 3A is located above the fan and the backflow preventing sheet in fig. 3B is located below the fan, in order to close the backflow preventing sheet, the third current value set in fig. 3B needs to be greater than the third current value set in fig. 3A, so that the backflow preventing sheet is "pulled" to remain closed.
According to the backflow prevention method, the backflow prevention sheet can be automatically adapted to the working mode of the heat radiation device, the fans which normally operate in various air supply states of the heat radiation device can normally exhaust air, and the failed fans cannot generate airflow backflow, so that the normal operation of the heat radiation device is guaranteed. Meanwhile, current values are set for different working states, so that energy consumption is saved, and the integral heat dissipation effect is improved.
Example 2
Referring to fig. 4-6, the present embodiment further provides a backflow preventing device applied to a heat dissipating apparatus, where the heat dissipating apparatus includes at least two fans 1 arranged side by side and a backflow preventing sheet 2 of a magnetic material arranged corresponding to the fans 1, and the backflow preventing device includes a controller and an electromagnetic assembly 3;
the electromagnetic assemblies 3 are arranged at the edges of the two sides of the air supply opening of the fan; the controller is electrically connected with the electromagnetic assembly 3; the controller is used for executing the backflow prevention method in the embodiment 1 to control the electromagnetic assembly 3 to adapt to the working state of the fan 1.
Fig. 4 is an overall side view of the heat dissipating device and the backflow preventing device, fig. 5 is a front view thereof, and fig. 6 is a top view thereof.
As a preferred embodiment, the fan 1 includes a PIN interface, and the controller is configured to read the PIN interface to obtain the working state.
In this embodiment, the current operation state of the fan 1, for example, the normal operation or failure state, can be obtained by reading the PIN signal of the fan 1. The read signal can be used as a trigger condition of subsequent adaptive operation, and the controller sends out a corresponding instruction to enable the backflow prevention sheet 2 to be automatically adapted to the current working state of the fan, so that the backflow prevention effect is achieved.
As a preferred embodiment, the backflow preventing device further comprises a gravity sensing device arranged on the fan 1 and used for detecting the direction of the air supply outlet of the fan 1 and sending the direction of the air supply outlet to the controller; the controller is also used for setting current parameters according to the working state and the orientation of the air supply outlet.
The backflow preventing device of the embodiment comprises a gravity sensing device arranged on the fan 1, in particular to an integratable gravity sensor, wherein a cantilever type shifter made of an elastic sensitive element and an energy storage spring made of the elastic sensitive element are used for driving an electric contact, so that the conversion from gravity change to electric signal is completed. Because the setting position of the backflow prevention sheet is related to the current parameter for determining the magnetic force, the gravity sensing device is arranged to acquire the orientation of the air supply opening of the fan, so that the gravity factor in the control of the backflow prevention sheet can be determined, and the backflow prevention sheet can be controlled more reasonably and accurately.
In a preferred embodiment, the backflow preventing device further comprises a wind force detecting device, and the wind force detecting device is used for detecting a first wind force value of the air supply opening of the fan and sending the first wind force value to the controller. The controller is also configured to set an operating parameter based on the operating condition and the first wind force value.
The backflow prevention device of the embodiment comprises a wind power detection device, and specifically can be a cup anemometer or a propeller anemometer arranged at an air supply port of a fan, and a hot wire anemometer manufactured by utilizing the principle that the heat dissipation rate of a heated object is related to the wind speed can be arranged according to the size of a space; or an ultrasonic anemometer which is manufactured by utilizing the principle that the sound wave spreading speed is influenced by the wind speed and is increased or decreased.
The data collected by the anemometer corresponds to the operation parameters controlled by the backflow prevention sheet, an empirical distribution model is obtained through multiple statistics, and the reference set value of the operation parameters corresponding to each wind power measurement parameter is obtained through the empirical distribution model, so that the auxiliary decision and the reference deviation correction effect can be formed when the operation parameters are set by the current controller, and the backflow prevention control efficiency and accuracy are further improved.
As a preferred embodiment, the backflow preventing device further comprises a connecting part 5; a connecting part 5 is arranged at the middle shaft position of the air supply opening of each fan 1; electromagnetic assemblies 3 are respectively arranged at the edges of the two sides of the air supply opening of each fan; each connecting part 5 is movably connected with two backflow prevention sheets 2, and the backflow prevention sheets are turned over to be opened or closed by taking the connecting parts 5 as axes.
According to the embodiment, the integrated connecting part and the electromagnetic assembly are arranged on the electric fan, so that the backflow prevention sheet can be effectively controlled, the air supply outlet of the electric fan is completely closed when the backflow prevention sheet is closed, more space is not occupied when the backflow prevention sheet is opened, and meanwhile the connecting part and the electromagnetic assembly can be detachably fixedly connected with the electric fan, so that the backflow prevention sheet is convenient to install in different fans.
According to the backflow preventing device, the backflow preventing sheet can be automatically adapted to the working state of the backflow preventing sheet, the fan can normally outlet air in various working states or in a normal state or cannot flow back when the fan fails, so that the normal operation of the heat radiating device is guaranteed, and the heat radiating effect is guaranteed.
Example 3
Referring to fig. 7, the present embodiment also provides a heat dissipating system including a heat dissipating device 4 and a backflow preventing means; the backflow preventing means further comprises a connection portion 5. A connecting part 5 is arranged at the middle shaft position of the air supply opening of each fan 1; electromagnetic assemblies 3 are respectively arranged at the edges of the two sides of the air supply opening of each fan 1; each connecting part 5 is hinged with two backflow prevention sheets 2, and when the two backflow prevention sheets 2 turn over to a position parallel to the air supply opening by taking the connecting part 5 as a rotation axial air supply opening, the two backflow prevention sheets are respectively attached to the electromagnetic assemblies 3 arranged at the edges of the two sides of the fan 1 so as to seal the air supply opening. The change of the open/close state of the backflow preventing sheet 2 and the connection portion 5 can be seen in fig. 8. Of course, depending on the installation position of the electromagnetic assembly 3, the backflow prevention sheet 2 may be turned over by other means or positions, as long as the backflow gas is blocked by forming a seal to the air supply port of the fan 1.
The arrangement mode in the embodiment can better control the backflow prevention sheet, and the integrated connection arrangement mode of the backflow prevention sheet and the fan also has better control effect and space utilization effect. Of course, those skilled in the art will appreciate that the backflow prevention sheet may be provided independently of the fan, and even the electromagnetic assembly may be provided independently of the fan body. As long as the two are matched to perform normal air supply and closing when the fan fails.
The controller is respectively and electrically connected with the heat dissipation device and the electromagnetic assembly; the working state of the fan is obtained from the heat radiation equipment, and the current parameters of the electromagnetic assembly are set according to the working state; the controller is also used for sending current parameters to the electromagnetic assembly so that the electromagnetic assembly controls the opening and closing states of the backflow prevention sheet based on the operation parameters and is matched with the working state of the fan. The controller may be integrated with the central control unit of the heat dissipating device, or may be provided independently.
According to the heat dissipation system, the backflow prevention sheet can be automatically adapted to the working mode of the heat dissipation system, the fans which normally operate in various air supply states of the heat dissipation device can normally exhaust air, and the failed fans cannot generate air flow backflow, so that the normal operation of the heat dissipation device is guaranteed.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the principles and spirit of the invention, but such changes and modifications fall within the scope of the invention.

Claims (8)

1. The back flow preventing method for heat dissipating equipment includes the steps of providing at least two fans in side-by-side arrangement and back flow preventing sheets of magnetic material corresponding to the fans; a connecting part is arranged at the center shaft position of the air supply opening of each fan; electromagnetic assemblies are respectively arranged at the edges of the two sides of the air supply opening of each fan; each connecting part is movably connected with two backflow prevention sheets, and the two backflow prevention sheets turn over by taking the connecting parts as shafts so as to be opened or closed; the heat dissipation device and the main body device are integrally formed, or are independently and additionally arranged on the main body device;
the backflow prevention method comprises the following steps:
acquiring the working state of the fan, wherein the working state comprises a normal state and a failure state;
setting operation parameters of the electromagnetic assembly according to the working state, wherein the operation parameters comprise current parameters and specifically comprise:
if the working state is a normal state, setting the current to be zero or the current direction to be a first direction;
if the working state is a failure state, setting the current direction as a second direction;
sending the operation parameter to the electromagnetic assembly, so that the electromagnetic assembly controls the opening and closing state of the backflow prevention sheet to be matched with the working state of the fan based on the operation parameter, and the method specifically comprises the following steps:
if the working state is a normal state, the electromagnetic assembly is used for controlling the backflow prevention sheet to be opened according to the operation parameters;
if the working state is a failure state, the electromagnetic assembly is used for controlling the backflow prevention sheet to be closed according to the operation parameters;
wherein the first direction and the second direction are opposite, and the current in the first direction is used for making the electromagnetic assembly generate magnetic force which is repulsive to the backflow preventing sheet; the current in the second direction is used for enabling the electromagnetic assembly to generate magnetic force attracted to the backflow prevention sheet.
2. The backflow preventing method for heat dissipating equipment of claim 1 wherein the normal state comprises normal blowing and normal suction; the failure state comprises blowing failure and exhausting failure; the opening direction of the backflow preventing sheet is consistent with the blowing direction of the fan;
the step of setting the operation parameters of the electromagnetic assembly according to the working state comprises the following steps:
setting a current value of the electromagnetic assembly according to the working state;
if the working state is normal blowing, setting the current value as a first current value;
if the working state is normal air suction, setting the current value as a second current value;
if the working state is the failure of blowing, setting the current value as a third current value;
if the working state is that the air draft fails, setting the current value as a fourth current value;
wherein the first current value is less than the second current value; the third current value is less than the fourth current value.
3. The method for preventing backflow for a heat sink device as set forth in claim 2, wherein the step of setting the operation parameters of the electromagnetic assembly according to the operation state comprises:
the first current value set when the backflow preventing sheet is located above the fan is greater than the first current value set when the backflow preventing sheet is located below the fan;
the second current value set when the backflow preventing sheet is located above the fan is greater than the second current value set when the backflow preventing sheet is located below the fan;
the third current value set when the backflow preventing sheet is located above the fan is smaller than the third current value set when the backflow preventing sheet is located below the fan;
the fourth current value set when the backflow preventing sheet is located above the fan is smaller than the fourth current value set when the backflow preventing sheet is located below the fan.
4. The backflow preventing device is applied to heat dissipating equipment and is characterized by comprising at least two fans arranged side by side and backflow preventing sheets of magnetic materials arranged corresponding to the fans, and comprises a controller and an electromagnetic assembly;
the electromagnetic assemblies are arranged at the edges of two sides of the air supply opening of the fan; the controller is electrically connected with the electromagnetic assembly;
the controller is configured to perform the backflow prevention method for the heat dissipating apparatus according to any one of claims 1 to 3, so as to adapt an open-close state of the backflow prevention sheet to an operation state of the fan by controlling the electromagnetic assembly.
5. The back-flow preventing apparatus for heat dissipating equipment as set forth in claim 4,
the fan comprises a PIN interface, and the controller is used for reading the PIN interface to acquire the working state.
6. The back-flow preventing apparatus for heat dissipating equipment as set forth in claim 5,
the backflow prevention device further comprises a gravity sensing device arranged on the fan and used for detecting the direction of an air supply outlet of the fan and sending the direction of the air supply outlet to the controller;
the controller is also used for setting current parameters of the electromagnetic assembly according to the working state and the orientation of the air supply outlet.
7. The back-flow preventing apparatus for heat dissipating equipment as set forth in claim 4,
the backflow prevention device further comprises a wind power detection device, wherein the wind power detection device is used for detecting a first wind power value of an air supply opening of the fan and sending the first wind power value to the controller;
the controller is also configured to set an operating parameter based on the operating state and the first wind force value.
8. The back-flow preventing apparatus for heat dissipating equipment as set forth in claim 4,
the backflow preventing device further comprises a connecting part;
the middle shaft position of the air supply opening of each fan is provided with one connecting part;
the electromagnetic assemblies are respectively arranged at the edges of the two sides of the air supply opening of each fan;
each connecting part is movably connected with two backflow prevention sheets, and the two backflow prevention sheets turn over by taking the connecting part as an axis so as to be opened or closed.
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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114721476B (en) * 2022-03-28 2024-04-09 西安易朴通讯技术有限公司 Heat abstractor and server
CN117998807A (en) * 2022-10-31 2024-05-07 锐捷网络股份有限公司 Heat dissipation system and electronic equipment using same

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102094839A (en) * 2009-12-11 2011-06-15 建准电机工业股份有限公司 Fan system and stopping control circuit thereof
CN102968164A (en) * 2011-09-01 2013-03-13 鸿富锦精密工业（深圳）有限公司 Cooling system with backflow prevention function
CN203297156U (en) * 2013-06-05 2013-11-20 加弘科技咨询(上海)有限公司 Backflow preventing structure
CN210196145U (en) * 2019-06-29 2020-03-27 苏州浪潮智能科技有限公司 Fan backflow prevention structure

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8429238D0 (en) * 1984-11-20 1984-12-27 Airflow Dev Ltd Anti-back-draught flaps
JP2001358486A (en) * 2000-06-12 2001-12-26 Fuji Electric Co Ltd Cooler
TWI318862B (en) * 2006-11-10 2009-12-21 Delta Electronics Inc Fan capable of anti-backflow and fan frame thereof
KR100859114B1 (en) * 2007-04-17 2008-09-25 주식회사 솔레모 Regular winds fan
CN201167447Y (en) * 2008-02-27 2008-12-17 杭州华三通信技术有限公司 Radiating device for electronic appliances
CN101568249A (en) * 2008-04-22 2009-10-28 鸿富锦精密工业（深圳）有限公司 Electronic system and wind direction limit device thereof
KR100974451B1 (en) * 2010-03-10 2010-08-06 주식회사 삼원이.엔.지 Back draft damper with magnetic wing-plate
CN102606541A (en) * 2011-01-24 2012-07-25 鸿富锦精密工业（深圳）有限公司 Fan device
TW201327115A (en) * 2011-12-22 2013-07-01 Hon Hai Prec Ind Co Ltd Airflow blocking window
CN103369915A (en) * 2012-03-29 2013-10-23 鸿富锦精密工业（深圳）有限公司 Wind resistance device and electronic product with wind resistance device
CN103369914A (en) * 2012-03-29 2013-10-23 鸿富锦精密工业（深圳）有限公司 Wind resistance device and electronic product with wind resistance device
CN203980335U (en) * 2014-08-14 2014-12-03 中山市健泰实业有限公司 Magnetic backflow prevention device
CN205778361U (en) * 2016-01-27 2016-12-07 中兴通讯股份有限公司 A kind of shutter and subrack
CN106055051B (en) * 2016-06-27 2019-07-26 联想(北京)有限公司 A kind of device and fan wall of anti-return
CN207395095U (en) * 2017-09-19 2018-05-22 上海德惠特种风机有限公司 A kind of fan outlet structure for being used to prevent gas backstreaming
CN108386386A (en) * 2018-01-23 2018-08-10 中国电子科技集团公司第五十二研究所 A kind of fairing having both anti-return function
CN208077086U (en) * 2018-04-27 2018-11-09 新华三技术有限公司 A kind of fan slot bit architecture and cabinet
CN111396346B (en) * 2020-03-19 2021-02-19 浙江上风高科专风实业有限公司 Check valve convenient to control for roof type fan
TWM597825U (en) * 2020-04-08 2020-07-01 立端科技股份有限公司 Cooling fan module with backflow prevention function and host system including the same
CN212028184U (en) * 2020-04-26 2020-11-27 苏州欧蒂华电子有限公司 Fan device capable of preventing air from flowing back
KR102239879B1 (en) * 2020-06-01 2021-04-13 주식회사 존환경디자인 Ventilation damper device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102094839A (en) * 2009-12-11 2011-06-15 建准电机工业股份有限公司 Fan system and stopping control circuit thereof
CN102968164A (en) * 2011-09-01 2013-03-13 鸿富锦精密工业（深圳）有限公司 Cooling system with backflow prevention function
CN203297156U (en) * 2013-06-05 2013-11-20 加弘科技咨询(上海)有限公司 Backflow preventing structure
CN210196145U (en) * 2019-06-29 2020-03-27 苏州浪潮智能科技有限公司 Fan backflow prevention structure

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