Heat dissipation method of airborne equipment

Abstract

The invention provides a heat dissipation method for airborne equipment, and belongs to the technical field of avionics equipment.The heat dissipation method specifically comprises the steps that a fan, a control valve and a temperature sensor are installed on a processing cabinet, the temperature sensor is arranged on a module needing temperature monitoring, and a power module is in communication connection with at least one data processing module; the data processing module receives the temperature information of all the temperature sensors, the temperature information is compared with a temperature threshold value, and if any temperature is larger than the temperature threshold value, it is judged that the processing cabinet is in an overtemperature state; the data processing module receives air supply failure information from the environment control system; and if the air supply of the environment control system fails or the processing cabinet is judged to be in an overtemperature state, the data processing module controls the fan and the control valve by controlling the power supply module, and the fan is used for cooling each module. The stable working environment temperature is maintained through the high-reliability heat dissipation method, and the aircraft navigation safety is improved.

Description

Technical Field

[0001] The present application relates to the technical field of avionics equipment, and in particular to a heat dissipation method for airborne equipment. Background Art

[0002] Airborne equipment refers to all electromechanical systems and subsystems installed or suspended on an aircraft, usually composed of a cabinet and plug-in modules. With the development of electronic technology, the integration and complexity of airborne equipment are getting higher and higher, and its power consumption per unit volume is also increasing. The heat dissipation area of ​​the equipment is getting smaller and smaller, but the heat generation is increasing. Studies have shown that the failure rate of equipment components increases exponentially with the increase in temperature, and heat-related integrated circuit failures account for more than 50% of all integrated circuit failures.

[0003] Traditional heat dissipation methods include air cooling and liquid cooling technology. Air cooling technology directly blows cooling air onto the surface of the heat-generating device to remove its heat, while liquid cooling technology uses steam circulation for cooling, which has higher heat dissipation efficiency. The reliability of single-source air cooling technology depends on the fan. Once the fan fails, the heat dissipation function of the entire airborne equipment will be paralyzed; the steam circulation system in liquid cooling technology will be affected by the motion load generated by the aircraft's maneuvers, and there is a risk of refrigerant leakage. It is also expensive and has poor economic efficiency.

[0004] The cooling methods of single air source air cooling and liquid cooling cannot meet the requirements of airborne equipment for high reliability operating environment. Therefore, it is very important to propose a high reliability heat dissipation method suitable for the characteristics of airborne equipment for the stable operation and service life of the equipment. Summary of the invention

[0005] In view of this, an embodiment of the present application provides a heat dissipation method for airborne equipment, which can achieve heat dissipation for a processing cabinet by controlling a heat dissipation fan when the forced air cooling provided by the environmental control system fails or is insufficient.

[0006] The present application provides a method for heat dissipation of an airborne device, the method comprising:

[0007] A fan, a control valve and a temperature sensor are installed on the processing cabinet, wherein a plurality of data processing modules, a function support module and a power supply module are arranged inside the processing cabinet, the temperature sensor is arranged on the data processing module and the function support module, the power supply module supplies power to each module, and the power supply module is also connected to at least one data processing module through a communication bus for communication;

[0008] A data processing module in communication with the power module periodically receives temperature information of all the temperature sensors;

[0009] The acquired temperature information is compared with the currently set temperature threshold. If the current temperature of any temperature sensor is greater than the set temperature threshold, it is determined that the processing cabinet is in an over-temperature state.

[0010] A data processing module in communication with the power module receives air supply failure information from the environmental control system;

[0011] If the data processing module receives a signal that the air supply of the environmental control system has failed or determines that the processing cabinet is in an over-temperature state, the data processing module controls the fan and the control valve by controlling the power supply module, and uses the fan to dissipate heat for each module.

[0012] According to a specific implementation of the embodiment of the present application, controlling the fan and the control valve by controlling the power supply module includes:

[0013] The control valve outputs two digital discrete signals D1 and D2. D1 indicates that the control valve is in the fan position, and the environmental control system supplies air for cooling. D2 indicates that the control valve is in the main air duct, and the fan supplies air for cooling.

[0014] Power supply interfaces of two control valves are led out from the power module. There is a pressure difference between the two power supply interfaces. The movement of the control valves is controlled by the pressure difference between the control valves. The cooling mode switching between air supply cooling and fan air supply cooling of the environmental control system is realized by the movement of the control valves.

[0015] According to a specific implementation of the embodiment of the present application, the controlling of the fan and the control valve by controlling the power supply module further includes:

[0016] The power module receives a fan speed indication signal from the fan, analyzes the fan speed indication signal, and sends the fan speed information to the data processing module through the communication bus;

[0017] The data processing module sends a fan speed adjustment instruction to the power module through the communication bus according to the temperature information of the temperature sensor and the fan speed information currently received;

[0018] After receiving the fan speed adjustment instruction, the power module sends a fan speed adjustment signal to the outside to adjust and control the fan speed.

[0019] According to a specific implementation of the embodiment of the present application, the method further includes:

[0020] The fan power supply interface is connected to the power module and has a voltage of 28 V DC.

[0021] According to a specific implementation of the embodiment of the present application, in the step of using a fan to dissipate heat for each module, the step of controlling the switch of the fan includes:

[0022] The conditions for controlling the fan to shut down are set as follows: the air supply of the environmental control system is normal, and the duration of the over-temperature fault should meet the set value;

[0023] Set the conditions for controlling the fan to start: the air supply of the environmental control system fails, or there is an over-temperature fault;

[0024] The data processing module samples the air supply and over-temperature conditions of the environmental control system at fixed intervals to determine the fan switch;

[0025] When the fan is in the off state, the data processing module determines the environmental control system and the over-temperature state once at a fixed time interval, and turns on the fan to supply air when the environmental control system fails to supply air or there is an over-temperature fault;

[0026] When the fan is turned on, the data processing module determines the environmental control system and the over-temperature state within a fixed time interval. When the environmental control system supplies air normally and the duration of no over-temperature fault meets the set value, the fan is turned off.

[0027] According to a specific implementation of an embodiment of the present application, the cooling method of the fan is exhaust cooling, and cold air flows into the interior of the processing cabinet from the top of the processing cabinet, and flows out from the fan after passing through each module.

[0028] According to a specific implementation of the embodiment of the present application, the method further includes:

[0029] When the cooling mode is switched, the fan is turned off;

[0030] After the cooling mode is switched, the power module disconnects the power supply to the control valve.

[0031] Beneficial effects:

[0032] The heat dissipation method for airborne equipment in the embodiment of the present application selects a suitable heat dissipation method according to the actual temperature conditions of the airborne equipment and the air supply status of the environmental control system, thereby making up for the problem of insufficient reliability of a single cooling method, ensuring that the airborne equipment can always maintain a stable working environment temperature through a high-reliability heat dissipation method, and providing strong protection for the safe navigation of the aircraft. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 A schematic diagram of the physical structure of a heat dissipation method for airborne equipment according to an embodiment of the present invention;

[0035] Figure 2 A logic diagram of a power module controlling a fan and a control valve according to an embodiment of the present invention;

[0036] Figure 3 FIG. 4 is a flowchart of fan switch control according to an embodiment of the present invention. DETAILED DESCRIPTION

[0037] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0038] The following describes the implementation methods of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present application.

[0039] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0040] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The illustrations only show the components related to the present application rather than being drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0041] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects described may be practiced without these specific details.

[0042] The present application embodiment provides a heat dissipation method for an airborne device. Figures 1 to 3 Describe in detail.

[0043] The heat dissipation method of the airborne device in this embodiment includes the following steps:

[0044] Step 1: Install a fan, a control valve and a temperature sensor on a processing cabinet, wherein the processing cabinet is provided with a plurality of data processing modules, a power supply module and a function support module, the temperature sensor is provided on the data processing module and other modules requiring temperature monitoring, the power supply module supplies power to each module, and the power supply module is also communicatively connected with at least one data processing module via a communication bus;

[0045] Step 2: The data processing module in communication with the power module periodically receives the temperature information of all the temperature sensors;

[0046] Step 3: compare the acquired temperature information with the currently set temperature threshold. If the current temperature of any temperature sensor is greater than the set temperature threshold, it is determined that the processing cabinet is in an over-temperature state.

[0047] Step 4: The data processing module in communication with the power module receives air supply failure information from the environmental control system;

[0048] Step 5: If the data processing module receives a signal that the air supply of the environmental control system has failed or determines that the processing cabinet is in an over-temperature state, the data processing module controls the fan and the control valve by controlling the power supply module, and uses the fan to dissipate heat for each module.

[0049] In specific implementation, the processing cabinet is equipped with fans and control valves. Under normal working conditions, heat is dissipated through environmental control air (air supply from the environmental control system). The cooling method of environmental control air is blowing heat dissipation, that is, the air is blown in from the environmental control air outlet, flows into the cabinet, passes through the inside of the module and flows out from the top of the cabinet. At the same time, only one heat dissipation method is effective (environmental control air heat dissipation or fan heat dissipation), and the control valve controls the air outlet baffle to block the inlet (outlet) of the other heat dissipation method. The processing cabinet receives the environmental control air working status information from the environmental control system. When the environmental control air supply is unavailable, the fan will be used to cool the module.

[0050] Temperature sensors are installed in modules with high power consumption and poor heat dissipation conditions in the processing cabinet to monitor the module temperature and report the temperature information to the data processing module with a communication interface. The over-temperature judgment component defines and completes the over-temperature status judgment of the processing cabinet. When the processing cabinet is judged to be over-temperature, the fan will be enabled for cooling.

[0051] In addition to over-temperature judgment, the data processing module with a communication interface also communicates with the power module through the communication bus, receives valve and fan sensor signals from the power module, and sends instructions to the power module to move the valve, turn on / off the fan, and connect / disconnect the valve power when the cooling mode is switched. Only one data processing module controls the power module at the same time, and only one power module controls the valve and fan at the same time.

[0052] In one embodiment, the data processing module, power supply module and function support module can be set to multiple. In this embodiment, the data processing modules are set to 6, the other modules are set to 2, and the power supply modules are set to 2. The data processing module provides comprehensive data processing functions for the processing cabinet; the power supply module supplies power to all modules, fans and control valves in the cabinet, and is responsible for direct control of the fans and control valves; the function support module ( Figure 1 The processing cabinet provides other support for the processing cabinet, such as communication support, etc.; the processing cabinet provides slots and data connections, power bus paths for all modules, and has fans and control valves to provide cooling through fans.

[0053] like Figure 1 As shown, in this embodiment, there is a communication interface between the two power modules and the two specific data processing modules. The two data processing modules can communicate with the power module through the communication bus and send instructions to the power module to control the control valve and the fan. The fan and the control valve are controlled by the data processing module through the power module. Each data processing module and other modules that need to monitor the temperature are equipped with a temperature sensor. The data processing module with a communication interface can obtain the temperature information of each module through the over-temperature judgment component inside the module.

[0054] In one embodiment, referring to Figure 2 , the control of the fan and the control valve by controlling the power supply module includes:

[0055] The control valve outputs two digital discrete signals D1 and D2. D1 indicates that the control valve is in the fan position, and the environmental control system supplies air for cooling. D2 indicates that the control valve is in the main air duct, and the fan supplies air for cooling.

[0056] Power supply interfaces of two control valves are led out from the power module. There is a pressure difference between the two power supply interfaces. The movement of the control valves is controlled by the pressure difference between the control valves. The cooling mode switching between air supply cooling and fan air supply cooling of the environmental control system is realized by the movement of the control valves.

[0057] Furthermore, the method of controlling the fan and the control valve by controlling the power supply module further includes:

[0058] The power module receives a fan speed indication signal from the fan, analyzes the fan speed indication signal, and sends the fan speed information to the data processing module through the communication bus;

[0059] The data processing module sends a fan speed adjustment instruction to the power module through the communication bus according to the temperature information of the temperature sensor and the fan speed information currently received;

[0060] After receiving the fan speed adjustment instruction, the power module sends a fan speed adjustment signal to the outside to adjust and control the fan speed.

[0061] In one embodiment, the method further comprises:

[0062] The fan power supply interface is connected to the power module and has a voltage of 28 V DC.

[0063] In one embodiment, referring to Figure 3 In the step of using a fan to dissipate heat for each module, the fan switch control step includes:

[0064] The conditions for controlling the fan to shut down are set as follows: the air supply of the environmental control system is normal, and the duration of the over-temperature fault should meet the set value;

[0065] Set the conditions for controlling the fan to start: the air supply of the environmental control system fails, or there is an over-temperature fault;

[0066] The data processing module samples the air supply and over-temperature conditions of the environmental control system at fixed intervals to determine the fan switch;

[0067] When the fan is in the off state, the data processing module determines the environmental control system and the over-temperature state once at a fixed time interval, and turns on the fan to supply air when the environmental control system fails to supply air or there is an over-temperature fault;

[0068] When the fan is turned on, the data processing module determines the environmental control system and the over-temperature state within a fixed time interval. When the air supply of the environmental control system is normal and the duration of the over-temperature fault does not meet the set value, the fan is turned off.

[0069] In one embodiment, the cooling method of the fan is exhaust cooling, and cold air flows into the processing cabinet from the top of the processing cabinet, and flows out from the fan after passing through each module.

[0070] In one embodiment, the method further comprises:

[0071] When the cooling mode is switched, the fan is turned off;

[0072] After the cooling mode is switched, the power module disconnects the power supply to the control valve.

[0073] In specific implementation, the power module directly controls the power supply to the fan and the control valve. When the cooling mode needs to be switched, the power module commands the control valve to rotate, thereby moving the baffle to switch the cooling mode. When the cooling mode is switched, the fan will be turned off to avoid cooling air loss. After the cooling mode is switched, the power module will disconnect the valve power supply.

[0074] In the embodiment provided by the present invention, a fan and a control valve are installed on the processing cabinet, and the module temperature is monitored through the temperature sensor of the module in the cabinet. When the module is over-temperature, the fan is controlled through the power module to achieve heat dissipation of the module in the cabinet. The appropriate heat dissipation method is selected according to the actual temperature conditions of the airborne equipment and the air supply status of the environmental control system, which makes up for the problem of insufficient reliability of a single cooling method, ensures that the airborne equipment can always maintain a stable working environment temperature through a high-reliability heat dissipation method, and provides a strong guarantee for the safe navigation of the aircraft.

[0075] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A heat dissipation method for airborne equipment, characterized in that: The method comprises: A fan, a control valve and a temperature sensor are installed on the processing cabinet, wherein a plurality of data processing modules, a function support module and a power supply module are arranged inside the processing cabinet, the temperature sensor is arranged on the data processing module and the function support module, the power supply module supplies power to each module, and the power supply module is also connected to at least one data processing module through a communication bus for communication; A data processing module in communication with the power module periodically receives temperature information of all the temperature sensors; The acquired temperature information is compared with the currently set temperature threshold. If the current temperature of any temperature sensor is greater than the set temperature threshold, it is determined that the processing cabinet is in an over-temperature state. A data processing module in communication with the power module receives air supply failure information from the environmental control system; If the data processing module receives a signal that the air supply of the environmental control system has failed or determines that the processing cabinet is in an over-temperature state, the data processing module controls the fan and the control valve by controlling the power supply module, and uses the fan to dissipate heat for each module.

2. The heat dissipation method of airborne equipment according to claim 1, characterized in that: The method of controlling the fan and the control valve by controlling the power supply module comprises: The control valve outputs two digital discrete signals D1 and D2. D1 indicates that the control valve is in the fan position, and the environmental control system supplies air for cooling. D2 indicates that the control valve is in the main air duct, and the fan supplies air for cooling. Power supply interfaces of two control valves are led out from the power module. There is a pressure difference between the two power supply interfaces. The movement of the control valves is controlled by the pressure difference between the control valves. The cooling mode switching between air supply cooling and fan air supply cooling of the environmental control system is realized by the movement of the control valves.

3. The heat dissipation method of airborne equipment according to claim 2, characterized in that: The control of the fan and the control valve by controlling the power supply module also includes: The power module receives a fan speed indication signal from the fan, analyzes the fan speed indication signal, and sends the fan speed information to the data processing module through the communication bus; The data processing module sends a fan speed adjustment instruction to the power module through the communication bus according to the temperature information of the temperature sensor and the fan speed information currently received; After receiving the fan speed adjustment instruction, the power module sends a fan speed adjustment signal to the outside to adjust and control the fan speed.

4. The heat dissipation method of airborne equipment according to claim 1, characterized in that: The method further comprises: The fan power supply interface is connected to the power module and has a voltage of 28 V DC.

5. The heat dissipation method of airborne equipment according to claim 1, characterized in that: In the step of using a fan to dissipate heat for each module, the step of controlling the switch of the fan includes: The conditions for controlling the fan to shut down are set as follows: the air supply of the environmental control system is normal, and the duration of the over-temperature fault should meet the set value; Set the conditions for controlling the fan to start: the air supply of the environmental control system fails, or there is an over-temperature fault; The data processing module samples the air supply and over-temperature conditions of the environmental control system at fixed intervals to determine the fan switch; When the fan is in the off state, the data processing module determines the environmental control system and the over-temperature state once at a fixed time interval, and turns on the fan to supply air when the environmental control system fails to supply air or there is an over-temperature fault; When the fan is turned on, the data processing module determines the environmental control system and the over-temperature state within a fixed time interval. When the environmental control system supplies air normally and the duration of no over-temperature fault meets the set value, the fan is turned off.

6. The heat dissipation method of airborne equipment according to claim 1, characterized in that: The cooling method of the fan is exhaust cooling, and cold air flows into the processing cabinet from the top of the processing cabinet, and flows out from the fan after passing through each module.

7. The heat dissipation method of airborne equipment according to claim 2, characterized in that: The method further comprises: When the cooling mode is switched, the fan is turned off; After the cooling mode is switched, the power module disconnects the power supply to the control valve.

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