Method for evaluating equipment and cooling means for simulating heating and cooling of typical equipment in a cabin

Abstract

The application belongs to the field of aircraft electromechanical system test, and particularly relates to a device for simulating heat generation and cooling of typical equipment in a cabin and a cooling mode evaluation method. The device is composed of a cold plate, a heat generation chip, a fan, a fin, an air control air cooling channel, a temperature measuring thermocouple and the like. The heat generation chip is composed of a group of heat generation chips, and the heat generation chip group is packaged in a heat generation box. A plurality of fans are installed in the heat generation box and can be used for cooling the heat generation box. Slots are left on the wall surface of the heat generation box, and the fins can be installed and removed to increase the heat dissipation area of the heat generation box. The cold plate is arranged on the upper surface of the heat generation box, a coolant channel is reserved in the cold plate, the coolant flows through the channel, and liquid cooling of the heat generation box is realized. The heat generation box shell is open on the left and right sides, and air inlet and outlet channels are reserved for air control air cooling. Temperature measuring thermocouples are arranged on the surface of the heat generation box shell to monitor the surface temperature of the device. The application can simulate different cooling modes, monitor the temperature of the device and the cabin, study the relationship between heat generation and cooling of the cabin equipment under different working conditions, comprehensively evaluate the cooling effect of different cooling modes, and provide an important basis for the development of the cooling mode.

Description

Technical Field

[0001] This invention belongs to the field of aircraft electromechanical system testing, specifically relating to an evaluation method for equipment and cooling methods that simulate the heating and cooling of typical cabin equipment. Background Technology

[0002] With the rapid development of computer and electromechanical technologies, the equipment integration in advanced UAV cabins is increasing, functional requirements are constantly rising, and the need for heat dissipation is also growing. Excessive heat will reduce equipment efficiency or even cause it to stop working, seriously affecting aircraft flight and even flight safety. Therefore, effective cooling of cabin equipment to ensure its performance is essential.

[0003] Existing cabin equipment cooling methods mainly include natural heat dissipation, equipment-integrated fan cooling, onboard environmental control cooling, and liquid cooling. However, due to the limited space and cold source of UAVs, the formulation of equipment cooling methods and the control of cooling volume present significant challenges. When equipment operates in different states, the temperature of the equipment and the cabin temperature vary due to differences in heat generation and cooling methods. To improve the utilization rate of UAV space and cold source, it is necessary to conduct coupled design of equipment heat dissipation and cabin environment, and study the heat generation and cooling matching relationship of typical cabin equipment under different operating states, providing an important basis for the formulation of cooling methods.

[0004] Current research on the heating and cooling of cabin equipment primarily relies on numerical simulation methods, with limited physical experimental analysis. Furthermore, assessments typically focus on a single cooling method, lacking research on matching heating and cooling methods effectively. Because numerical simulations lack physical experimental verification and correlation studies between heating and cooling methods under different operating conditions, it is difficult to accurately identify the heat dissipation requirements of equipment under various conditions and match corresponding cooling methods. Overestimating heat dissipation requirements leads to wasted cabin space and onboard cooling sources; underestimating requirements results in overheating of equipment and even compromises flight safety.

[0005] In summary, it is necessary to conduct physical experiments to study the relationship between heat generation and cooling of typical equipment under different operating conditions, identify the equipment's heat dissipation requirements, and evaluate the cooling effects of different cooling methods. This will provide an important basis for the formulation of cooling methods, thereby improving cabin space and cold source utilization while ensuring flight safety. To achieve the above objectives, a standard, adjustable simulation device that incorporates multiple cooling methods is needed, along with a set of evaluation methods for cooling methods. Summary of the Invention

[0006] The purpose of this invention is to propose a device and cooling method for simulating the heating and cooling of typical equipment in a cabin. This device can simulate and adjust the heating power of the equipment, and can also simulate different cooling methods. By monitoring the temperature of the equipment and the cabin, the relationship between the heating and cooling of the cabin equipment under different operating conditions is studied, and the cooling effect of different cooling methods is evaluated, providing an important basis for the formulation of cooling methods.

[0007] The technical solution of this invention: To achieve the above-mentioned objectives, this invention proposes a device for simulating the heating and cooling of typical equipment in a cabin. This device comprises a cold plate, a heating chip, a fan, fins, a controlled air-cooling channel, and a temperature-measuring thermocouple, etc.

[0008] The heating chip consists of a set of heating chips, which are encapsulated inside the heating box. Multiple built-in fans are installed inside the heating box for cooling. Slots are provided on the heating box walls for installing and removing fins to increase the heat dissipation area. A cold plate is arranged on the upper surface of the heating box, with pre-reserved coolant channels inside. Coolant flows through these channels to achieve liquid cooling of the heating box. Openings are located on the left and right sides of the heating box shell, providing air inlet and outlet channels for environmentally controlled air cooling. Temperature-measuring thermocouples are also arranged on the surface of the heating box shell for monitoring the surface temperature of the equipment.

[0009] Furthermore, the equipment's heating power is adjustable, and because it has heat dissipation fins, a fan, a cold plate, and an environmentally controlled air cooling channel, it can simulate various cooling methods, including natural heat dissipation, self-contained fan cooling, liquid cooling, and environmentally controlled air cooling.

[0010] Furthermore, the operating state of the device can be adjusted by regulating the power of the heating chip and the number of working heating components, thereby simulating different heating powers of the device; the natural heat dissipation intensity of the device can be adjusted by adjusting the number of fins; the cooling mode of the device's built-in fan can be adjusted by adjusting the opening and closing and power of the device's fan; the liquid cooling mode of the device can be adjusted by adjusting the flow rate and temperature of the cold plate coolant; and the air intake volume and temperature of the device's vents can be adjusted by adjusting the environmental control air cooling mode of the device.

[0011] Furthermore, different cooling methods can be used simultaneously to achieve coupled cooling.

[0012] In another aspect, this invention proposes a method for evaluating cooling methods using the aforementioned equipment. This method studies the impact of different cooling method control quantities on equipment temperature and cabin temperature under UAV cabin constraints, and provides a recommended cooling method and cooling quantity evaluation method. The constraints, such as cabin space and coolant flow limit, are given by the actual situation on the aircraft. The cooling method control quantities refer to controlling coolant flow, temperature, fan power, number of fins, etc. Equipment temperature and cabin temperature are monitored by thermocouples. By comparing the cooling methods and cooling control quantities under the same control temperature, a recommended cooling method is given.

[0013] Furthermore, when evaluating the cooling method, the typical equipment for heating and cooling in the simulation chamber is first arranged in the simulation chamber. Thermocouples are installed on the simulation chamber. The heating power of the equipment is determined according to the working conditions of the typical equipment. The heating power of the heating equipment is controlled by controlling the number of heating chips in the heating box and the chip working voltage and current, thus simulating the heating conditions of the typical equipment.

[0014] Furthermore, a cooling method is selected and the cooling capacity is controlled. Optional cooling methods include:

[0015] a) Self-finned cooling mode: no coolant is supplied, the vents are closed, the built-in fan is off, and heat is dissipated through the equipment's built-in fins. The cooling intensity of natural heat dissipation can be adjusted by disassembling and assembling the fins.

[0016] b) Built-in fan cooling mode, no coolant, no ventilation, built-in fan on, remove the fins, adjust the cooling intensity of the built-in fan by adjusting the fan power;

[0017] c) In the environmental control air-cooling mode, no coolant is supplied, ventilation is provided through the vents, the built-in fan is turned off, the fins are removed, and the environmental control air-cooling intensity is adjusted by regulating the airflow and temperature of the vents. The air-cooling intensity is monitored by the flow and temperature sensors.

[0018] d) In the environmental control liquid cooling mode, coolant is supplied, the vents are closed, the built-in fan is turned off, the fins are removed, and the environmental control liquid cooling intensity is adjusted by regulating the coolant flow and temperature. The liquid cooling intensity is monitored by the flow and temperature sensors.

[0019] Further, determine whether the cooling control meets the machine constraints, which include: machine power supply limitations, which limit the power of the built-in fan; if the machine cannot provide air cooling due to space limitations or bleed air conditions, then environmental air cooling cannot be used; and machine liquid cooling flow and temperature limitations, which impose restrictions on the flow and temperature control of environmental liquid cooling. If the machine constraints are met, proceed to the next step; if not, reselect the cooling method or adjust the cooling capacity.

[0020] Furthermore, by measuring the temperature of the simulated chamber by thermocouples on the simulated chamber and the temperature of the thermocouple measuring equipment on the simulated equipment, it is determined whether the control requirements are met, such as the chamber temperature not exceeding 70°C and the equipment temperature not exceeding 120°C. If the control objectives are met simultaneously, the next step is carried out; if not, the cooling method is reselected or the cooling capacity is adjusted.

[0021] Furthermore, during the evaluation test, the equipment power, cooling method, cooling capacity setting, equipment temperature, and cabin temperature are recorded to prepare for the selection of the cooling method;

[0022] Determine whether all available cooling method tests have been completed. If the tests are completed, proceed to the next step. If not, reselect the cooling method and adjust the cooling capacity.

[0023] By comparing the cooling methods and cooling capacity after the cabin temperature and equipment temperature control are completed, and based on the actual needs of the aircraft, the optimal cooling scheme under a certain operating condition is given; through the cooling method evaluation method, the recommended cooling methods under different heat generation conditions are given.

[0024] The beneficial effects of this invention are as follows: This invention simulates the heat generation and cooling of typical cabin equipment under different operating conditions and evaluates the cooling methods, specifically including the following advantages:

[0025] 1) The equipment's heating power can be adjusted to simulate the heating conditions of the equipment under different working conditions, which can be used for research on equipment operating conditions;

[0026] 2) A single device can incorporate multiple cooling methods, including natural heat dissipation, built-in fan cooling, on-board air cooling, liquid cooling, etc., allowing for the research of different cooling methods;

[0027] 3) It can monitor equipment temperature, evaluate the cooling effect of different cooling methods on equipment temperature, correlate the relationship between equipment heating and cooling, and provide recommended cooling methods. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the heating and cooling principle of typical equipment in the simulated cabin. 1 is the cold plate, 2 is the coolant channel, 3 is the heating chip group, 4 is the heating box, 5 is the equipment's built-in fan, 6 is the detachable fins, 7 is the environmental control air-cooling channel, 8 is the temperature measuring thermocouple of the heating equipment, and 9 is the equipment shell.

[0029] Figure 2 This is a schematic diagram of temperature measurement for equipment operating in a compartment, where 10 is a compartment temperature measuring thermocouple, 11 is the compartment outer cover, 12 is the coolant supply equipment, 13 is the flow and temperature sensor, 14 is the cooling air supply equipment, and 15 is the flow and temperature sensor.

[0030] Figure 3 This diagram illustrates the evaluation method for cooling methods. The heating power and cooling method are adjusted according to the equipment's operating conditions, and the cooling methods are compared and evaluated. For a detailed description, please refer to the specific implementation method. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0032] See appendix Figure 1 This invention discloses a device for simulating the heating and cooling of typical equipment in a simulated cabin, comprising a cold plate 1, a coolant channel 2, a heating chip assembly 3, a heating chamber 4, a built-in fan 5, detachable fins 6, an environmentally controlled air-cooling channel 7, a temperature-measuring thermocouple 8, and a housing 9. The heating chip assembly 3 consists of a group of heating chips, and its heating power can be controlled by adjusting the number of working chips, their operating voltage, and their operating current. The heating chip assembly is encapsulated inside the heating chamber 4, and a power plug is led out from the back of the heating chamber 4. Four built-in fans 5 are installed inside the heating chamber 4, with adjustable fan speeds for cooling the heating chamber. Slots are provided on the heating chamber wall for installing and removing fins 6. The number of detachable fins 6 is related to cooling requirements and can be used to increase the heat dissipation area of ​​the heating chamber. The upper surface of the heating chamber is tightly attached to the cold plate and can be fixed with bolts. An environmentally controlled air-cooling channel 7 is reserved inside the cold plate, through which coolant flows to achieve liquid cooling of the heating chamber. The housing of the heating device has openings on the left and right sides, providing air inlet and outlet channels for environmentally controlled air cooling. The surface of the equipment housing 9 is also equipped with a heating device temperature measuring thermocouple 8 for monitoring the surface temperature of the equipment.

[0033] In some design cases, the heating chip group built into the heating box consists of multiple heating chips (five 100W heating chips in this example). The rated heating power of the heating box can be directly adjusted by adjusting the number of heating chips in operation to simulate the heating conditions of typical equipment. For example, one heating chip can operate at 100W, two heating chips can operate at 200W, and the controllable power is 0-500W. In addition, the power of a single heating chip can be adjusted from 0 to 100W by adjusting the operating voltage and operating current of the heating chip.

[0034] The device for simulating the heating and cooling of typical equipment in a simulated cabin, as proposed in this invention, is used to evaluate heat dissipation schemes. The simulated equipment is placed within a simulated cabin or a real cabin section. A schematic diagram of cabin temperature measurement is shown below. Figure 2 As shown, the compartment can provide cold air and coolant, and the flow rate and temperature of the cold air and coolant are adjustable and monitorable. The compartment temperature can be monitored by thermocouple 10.

[0035] In the specific implementation process, the cooling method evaluation process is as follows: Figure 3 As shown, the specific evaluation process is as follows:

[0036] ①According to Figure 2 After the equipment is set up, the heating power of the equipment is determined according to the typical working conditions of the equipment. The heating power of the heating equipment is controlled by controlling the number of heating chips in the heating box and the chip working voltage and current, thus simulating the heating conditions of the typical equipment.

[0037] ② Select a cooling method and control the cooling capacity. Available cooling methods include:

[0038] a) Self-finned cooling mode: no coolant is supplied, the vents are closed, the built-in fan is off, and heat is dissipated through the equipment's built-in fins. The cooling intensity of natural heat dissipation can be adjusted by disassembling and assembling the fins.

[0039] b) Built-in fan cooling mode: No coolant is supplied, the vents are not ventilating, the built-in fan is turned on, the fins are removed, and the cooling intensity of the built-in fan is adjusted by adjusting the fan power.

[0040] c) In the air-cooled mode, no coolant is supplied, ventilation is provided through the vents, the built-in fan is turned off, the fins are removed, and the air-cooling intensity is adjusted by regulating the airflow and temperature of the vents. The air-cooling intensity is monitored by the flow and temperature sensors.

[0041] d) In the environmental control liquid cooling mode, coolant is supplied, the vents are closed, the built-in fan is turned off, the fins are removed, and the environmental control liquid cooling intensity is adjusted by regulating the coolant flow and temperature. The liquid cooling intensity is monitored by the flow and temperature sensors.

[0042] ③ Determine whether the cooling control meets the machine constraints. Machine constraints include: if the machine power supply is limited, the power of the built-in fan is limited; if the machine cannot provide air cooling due to space limitations or bleed air conditions, then air cooling cannot be used; if the machine liquid cooling flow rate and temperature are limited, then the flow rate and temperature control of the air cooling are restricted. If the machine constraints are met, proceed to the next step; if not, reselect the cooling method or adjust the cooling capacity.

[0043] ④ Monitor the chamber temperature and equipment temperature using thermocouples (8, 10) to determine if the control requirements are met, such as the chamber temperature not exceeding 70℃ and the equipment temperature not exceeding 120℃. If both control objectives are met, proceed to the next step; otherwise, reselect the cooling method or adjust the cooling capacity.

[0044] ⑤ Record the equipment power, cooling method, cooling capacity setting, equipment temperature and cabin temperature to prepare for the selection of cooling method.

[0045] ⑥ Determine whether all selectable cooling methods have been tested. If the test is completed, proceed to the next step. If not, reselect the cooling method and adjust the cooling capacity.

[0046] ⑦ Compare the cooling methods and cooling capacity after the cabin temperature and equipment temperature control are completed, and provide the optimal cooling scheme under a certain operating condition based on the actual needs of the aircraft;

[0047] Finally, based on the evaluation method of cooling methods, recommended cooling methods are given for different heat generation conditions.

[0048] In the above implementation process and examples of the present invention, the heating power of the device can be adjusted by adjusting the number of working heating chips and the working current and voltage, etc., to simulate the heating status of the device under different working conditions, which is used for the study of the device under different working conditions. The heating control method of the present invention is only one example. The core is to simulate different heating conditions of the device.

[0049] The simulation device proposed in this invention incorporates multiple cooling methods, including natural heat dissipation, built-in fan cooling, on-board environmental control air cooling, and liquid cooling. The experimental system of this invention is merely an example, encompassing, but not limited to, the four cooling methods mentioned above. The core feature is that a single device can simulate and evaluate the cooling effects of different methods.

[0050] Thermocouples can be used to monitor equipment temperature, and an evaluation process can be employed to assess the cooling effects of different cooling methods on equipment and cabin temperatures. The thermocouple monitoring method used in this invention is merely one example; its core purpose is to evaluate the comprehensive impact of different cooling methods on the operating temperatures of equipment and cabins under various conditions, thereby correlating equipment heating and cooling and providing crucial information for determining appropriate cooling methods.

[0051] The above description is merely a specific embodiment of the present invention, providing a detailed description of the invention. Parts not covered herein are conventional techniques. However, the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. The scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A method for evaluating the heating and cooling methods of typical equipment in a simulated cabin, characterized in that, The equipment consists of a cold plate, heating chips, fans, fins, an environmentally controlled air-cooling channel, and temperature-measuring thermocouples. The heating chips consist of a group of chips encapsulated inside the heating chamber. Multiple built-in fans are installed inside the heating chamber for cooling. Slots are provided on the heating chamber walls for installing and removing fins to increase the heat dissipation area. A cold plate is arranged on the upper surface of the heating chamber, with a pre-reserved coolant channel through which the coolant flows for liquid cooling. Openings on the left and right sides of the heating chamber shell provide air inlet and outlet channels for environmentally controlled air cooling. Temperature-measuring thermocouples are also arranged on the surface of the heating chamber shell to monitor the surface temperature of the equipment. Under the constraints of the UAV cabin, this study evaluates the impact of control variables of different cooling methods on equipment temperature and cabin temperature, and provides a recommended cooling method and evaluation method for cooling capacity. The constraints include cabin space and coolant flow limit, which are given by the actual situation on the aircraft. Cooling method control variables refer to the control of coolant flow, temperature, fan power, and number of fins. Equipment temperature and cabin temperature are monitored by thermocouples. By comparing the cooling methods and cooling control variables under the same control temperature, a recommended cooling method is given. When evaluating the cooling method, the typical equipment for heating and cooling in the simulation chamber is first arranged in the simulation chamber. Thermocouples are installed on the simulation chamber. The heating power of the equipment is determined according to the working conditions of the typical equipment. The heating power of the heating equipment is controlled by controlling the number of heating chips in the heating box and the chip working voltage and current, thus simulating the heating conditions of the typical equipment. Choose a cooling method and control the cooling capacity. Available cooling methods include: a) Self-finned cooling mode: no coolant is supplied, the vents are closed, the built-in fan is off, and heat is dissipated through the equipment's built-in fins. The cooling intensity of natural heat dissipation can be adjusted by disassembling and assembling the fins. b) Built-in fan cooling mode, no coolant, no ventilation, built-in fan on, remove the fins, adjust the cooling intensity of the built-in fan by adjusting the fan power; c) In the environmental control air cooling mode, no coolant is supplied, ventilation is provided through the vents, the built-in fan is turned off, the fins are removed, and the environmental control air cooling intensity is adjusted by regulating the airflow and temperature of the vents. The air cooling intensity is monitored by the flow and temperature sensors. d) In the environmental control liquid cooling mode, coolant is supplied, the vents are closed, the built-in fan is turned off, the fins are removed, and the environmental control liquid cooling intensity is adjusted by regulating the coolant flow and temperature. The liquid cooling intensity is monitored by the flow and temperature sensors. Determine whether the cooling control meets the machine constraints, which include: machine power supply limitations, which limit the power of the built-in fan; machine space limitations or bleed air conditions limitations, which prevent the machine from providing air cooling, so environmental air cooling cannot be used; machine liquid cooling flow and temperature limitations, which impose restrictions on the flow and temperature control of environmental liquid cooling; if the machine constraints are met, proceed to the next step; if not, reselect the cooling method or adjust the cooling capacity.

2. The method for evaluating the heating and cooling methods of typical equipment in a simulated cabin as described in claim 1, characterized in that, The equipment's heating power is adjustable, and because it has heat dissipation fins, a fan, a cold plate, and an environmentally controlled air cooling channel, it can simulate a variety of cooling methods, including natural heat dissipation, built-in fan cooling, liquid cooling, and environmentally controlled air cooling.

3. The method for evaluating the heating and cooling methods of typical equipment in a simulated cabin as described in claim 2, characterized in that, The operating state of the device can be adjusted by regulating the power of the heating chip and the number of working heating components, thereby simulating different heating powers of the device; the natural heat dissipation intensity of the device can be adjusted by adjusting the number of fins; the cooling mode of the device's built-in fan can be adjusted by adjusting the opening and closing and power of the device's fan; the liquid cooling mode of the device can be adjusted by adjusting the flow rate and temperature of the cold plate coolant; and the environmental control air cooling mode of the device can be adjusted by adjusting the air intake volume and temperature of the device's vents.

4. The method for evaluating the heating and cooling methods of typical equipment in a simulated cabin as described in claim 3, characterized in that, Different cooling methods can be used simultaneously to achieve coupled cooling.

5. The method for evaluating the heating and cooling methods of typical equipment in a simulated cabin as described in claim 1, characterized in that, The temperature of the simulation chamber is monitored by thermocouples on the simulation chamber and the temperature of the thermocouple measuring device on the simulation equipment to determine whether the control temperature is met. If the control temperature is met, the next step is carried out. If not, the cooling method is reselected or the cooling capacity is adjusted.

6. The method for evaluating the heating and cooling methods of typical equipment in a simulated cabin as described in claim 5, characterized in that, During the evaluation test, record the equipment power, cooling method, cooling capacity setting, equipment temperature, and cabin temperature to prepare for the selection of cooling method; determine whether all available cooling method tests have been completed. If the tests are completed, proceed to the next step; if not, reselect the cooling method and adjust the cooling capacity; compare the cooling method and cooling capacity after the cabin temperature and equipment temperature control are completed, and provide the optimal cooling scheme for a certain operating condition based on the actual needs of the aircraft; and provide recommended cooling methods for different heat-generating operating conditions through the cooling method evaluation method.

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