Equipment for simulating heating and cooling of typical equipment in cabin and cooling mode evaluation method

Abstract

The invention belongs to the field of airplane electromechanical system tests, and particularly relates to equipment for simulating heating and cooling of typical equipment in a cabin and a cooling mode evaluation method.The equipment is composed of a cold plate, heating chips, a fan, fins, an environment control air cooling channel, a temperature thermocouple and the like, the heating chip set is packaged in the heating box; a plurality of built-in fans are mounted in the heating box and can be used for cooling the heating box; slots are reserved in the wall surface of the heating box, and the fins can be mounted and dismounted for increasing the heat dissipation area of the heating box; a cold plate is arranged on the upper surface of the heating box, a coolant channel is reserved in the cold plate, and coolant flows through the channel to realize liquid cooling of the heating box; openings are formed in the left and right sides of the heating box shell, and an air inlet channel and an air outlet channel are reserved for environmental control air cooling; a temperature thermocouple is arranged on the surface of the heating box shell and used for monitoring the surface temperature of equipment. Different cooling modes can be simulated at the same time, the relation between heating and cooling of cabin equipment under different working conditions is researched by monitoring the temperature of the equipment and the cabin, the cooling effect of the different cooling modes is comprehensively evaluated, and an important basis is provided for formulating the cooling modes.

Description

Technical Field

[0001] The invention belongs to the field of aircraft electromechanical system testing, and in particular relates to a device for simulating heating and cooling of typical cabin equipment and a cooling mode evaluation method. Background Art

[0002] With the rapid development of computer and electromechanical technology, the equipment integration of advanced UAV equipment cabins is getting higher and higher, the functional requirements are constantly increasing, and the heat dissipation requirements are also increasing. When the heat is too high, the equipment efficiency will decrease or even stop working, causing serious impact on the flight of the aircraft and even affecting flight safety. Therefore, it is very necessary to cool the cabin equipment well to ensure its working performance.

[0003] Existing cabin equipment cooling methods mainly include natural heat dissipation, equipment built-in fan heat dissipation, onboard environmentally controlled air cooling, liquid cooling, etc. However, due to the limited space and cold source of UAVs, there are severe challenges in formulating equipment cooling methods and controlling the cooling amount. When the equipment is working in different states, the equipment temperature and cabin temperature are different due to different heat generation and cooling methods. In order to improve the utilization rate of UAV space and cold sources, it is necessary to carry out coupling design of equipment heat dissipation and cabin environment, study the heat generation and cooling matching relationship of typical cabin equipment under different working conditions, and provide an important basis for the formulation of cooling methods.

[0004] At present, the research on heating and cooling of cabin equipment is mainly carried out through numerical simulation methods, and physical test analysis is rarely carried out. Usually, only a single cooling method is evaluated, and there is a lack of relevant research on the matching of equipment heating and cooling methods. Due to the lack of physical test verification of numerical simulation and the lack of correlation research on equipment heating and cooling methods under different working conditions, it is difficult to accurately identify the heat dissipation requirements of the equipment under different working conditions and match the corresponding cooling methods. When the heat dissipation demand is overestimated, it will cause a waste of UAV cabin space and onboard cooling sources; when the heat dissipation demand is underestimated, it will cause equipment overheating and even affect flight safety.

[0005] In summary, physical experiments are needed to study the relationship between heat generation and cooling of typical equipment under different working conditions, identify the heat dissipation requirements of equipment, evaluate the cooling effects of different cooling methods, and provide an important basis for the formulation of cooling methods to improve the utilization of cabin space and cold sources while ensuring flight safety. In order to achieve the above goals, a standard, adjustable simulation device with multiple cooling methods is needed, as well as a set of cooling method evaluation methods. Summary of the invention

[0006] The purpose of the present invention is to propose a device for simulating the heating and cooling of typical equipment in a cabin and a cooling method evaluation method. The device can simulate and adjust the heating power of the equipment and simulate different cooling methods at the same time. By monitoring the temperature of the equipment and the cabin, the relationship between the heating and cooling of the cabin equipment under different working conditions is studied, and the cooling effects of different cooling methods are evaluated, providing an important basis for the formulation of cooling methods.

[0007] Technical solution of the present invention: In order to achieve the above-mentioned purpose of the invention, the present invention proposes a device for simulating the heating and cooling of typical equipment in a cabin, the device is composed of a cold plate, a heating chip, a fan, fins, an environmentally controlled air cooling channel, a temperature measuring thermocouple, etc.

[0008] The heating chip is composed of a group of heating chips, and the heating chip group is encapsulated inside the heating box; multiple built-in fans are installed inside the heating box to cool the heating box; slots are reserved on the wall of the heating box for installing and removing fins to increase the heat dissipation area of ​​the heating box; a cold plate is arranged on the upper surface of the heating box, and a coolant channel is reserved inside the cold plate, through which the coolant flows to achieve liquid cooling of the heating box; the left and right sides of the heating box shell are opened, with air inlet and outlet channels reserved for environmentally controlled air cooling; temperature measuring thermocouples are also arranged on the surface of the heating box shell to monitor the surface temperature of the equipment.

[0009] Furthermore, the heating power of the equipment is adjustable, and because it is equipped with heat dissipation fins, fans, cold plates, environmentally controlled air cooling channels, etc., it can simulate various cooling methods including natural heat dissipation, built-in fan heat dissipation, liquid cooling, and environmentally controlled air cooling.

[0010] Furthermore, the working state of the equipment can be adjusted by adjusting the power of the equipment's heating chip and the number of working heating components, thereby simulating different heating powers of the equipment; the natural heat dissipation intensity of the equipment can be adjusted by adjusting the number of fins; the equipment's built-in fan cooling mode can be adjusted by adjusting the on and off and power of the equipment's fan; the equipment's liquid cooling mode can be adjusted by adjusting the flow and temperature of the cold plate coolant; the equipment's environmentally controlled air cooling mode can be adjusted by adjusting the air intake volume and temperature of the equipment's vents.

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

[0012] On the other hand, the present invention also proposes a method for evaluating the cooling method using the above-mentioned equipment, which refers to studying the influence of the control quantities of different cooling methods on the equipment temperature and cabin temperature under the constraints of the UAV cabin, and providing a recommended cooling method and cooling amount evaluation method; wherein the constraints such as cabin space, coolant flow limit, etc. are given by the actual situation on the aircraft, the cooling method control quantity refers to the control of coolant flow, temperature, fan power, number of fins, etc., the equipment temperature, cabin temperature, etc. are monitored by thermocouples, and the recommended cooling method is given by comparing the cooling method and cooling control quantity under the same control temperature.

[0013] Furthermore, when evaluating the cooling method, firstly, the equipment simulating the heating and cooling of typical equipment in the cabin is arranged in the simulation cabin. The thermocouple is set on the simulation cabin. 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 to simulate the heating conditions of the typical equipment.

[0014] Furthermore, a cooling method is selected and the cooling amount is controlled. The optional cooling methods include:

[0015] a) Self-contained fin cooling mode, no coolant, no ventilation at the vents, self-contained fans turned off, heat dissipated by the equipment's own fins, and the cooling intensity of natural heat dissipation can be adjusted by disassembling and assembling the fins;

[0016] b) Self-contained fan cooling mode, no coolant, no ventilation at the vents, self-contained fan turned on, fins removed, and the cooling intensity of the self-contained fan was adjusted by adjusting the fan power;

[0017] c) Environment-controlled air cooling mode, no coolant, ventilation at the vents, self-contained fans turned off, fins removed, and the intensity of environment-controlled air cooling adjusted by adjusting the air volume and temperature at the vents, and the intensity of air cooling monitored by flow and temperature sensors;

[0018] d) Environmental control liquid cooling mode, coolant is passed, ventilation holes are blocked, built-in fans are turned off, fins are removed, and the intensity of environmental control liquid cooling is adjusted by adjusting the coolant flow and temperature, and the liquid cooling intensity is monitored by flow and temperature sensors.

[0019] Furthermore, it is determined whether the cooling control meets the onboard constraints. The onboard constraints include: the onboard power supply limit limits the power of the built-in fan; if the onboard space is limited or the air bleed conditions limit the air cooling, then the environmentally controlled air cooling cannot be used; if the onboard liquid cooling flow and temperature are limited, then the flow and temperature control of the environmentally controlled liquid cooling are limited; if the onboard constraints are met, proceed to the next step; if not, reselect the cooling method or adjust the cooling amount.

[0020] Furthermore, by measuring the cabin temperature monitored by the thermocouple on the simulation cabin and the device temperature measured by the thermocouple on the simulation device, it is determined whether the control requirements are met, such as the cabin temperature does not exceed 70°C, and the device temperature does not exceed 120°C; if the control targets are met at the same time, proceed to the next step, if not, reselect the cooling method or adjust the cooling amount.

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

[0022] Determine whether all optional cooling method tests are completed. If the test is completed, proceed to the next step. If not, reselect the cooling method and adjust the cooling amount.

[0023] By comparing the cooling methods and cooling amounts after cabin temperature and equipment temperature control are completed, the optimal cooling solution under a certain working condition is given according to the actual needs on board; through the cooling method evaluation method, the recommended cooling methods under different heating conditions are given.

[0024] Beneficial effects of the present invention: The present invention realizes the heating and cooling simulation of typical cabin equipment under different working conditions, and evaluates the cooling method, which specifically includes the following advantages:

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

[0026] 2) A device has multiple cooling methods, including natural heat dissipation, equipment-built-in fan heat dissipation, on-board environmentally controlled air cooling, liquid cooling, etc. Different cooling methods can be studied;

[0027] 3) It can monitor the device temperature, evaluate the cooling effect of different cooling methods on the device temperature, correlate the relationship between device heating and cooling, and give recommended cooling methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the principle equipment for simulating heating and cooling of typical equipment in the cabin, where 1 is the cold plate, 2 is the coolant channel, 3 is the heating chipset, 4 is the heating box, 5 is the fan provided by the equipment, 6 is the detachable fin, 7 is the environmentally controlled air cooling channel, 8 is the temperature measuring thermocouple of the heating equipment, and 9 is the equipment casing.

[0029] Figure 2 It is a schematic diagram of the temperature measurement of the equipment working in the cabin, wherein 10 is a cabin temperature measurement thermocouple, 11 is a cabin outer cover, 12 is a coolant supply device, 13 is a flow temperature sensor, 14 is a cooling air supply device, and 15 is a flow temperature sensor.

[0030] Figure 3 The figure is a schematic diagram of the evaluation method of the cooling method. The heating power and the cooling method are adjusted according to the working conditions of the equipment, and the cooling methods are compared and evaluated. For detailed description, please refer to the specific implementation method. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] See attached Figure 1 , a device for simulating the heating and cooling of typical equipment in a cabin proposed in the specific implementation process of the present invention comprises a cold plate 1, a coolant channel 2, a heating chipset 3, a heating box 4, a fan 5 provided by the equipment, a detachable fin 6, an environmentally controlled air cooling channel 7, a thermocouple 8 for measuring the temperature of the heating equipment, and an equipment housing 9; the heating chipset 3 is composed of a group of heating chips, and the heating power of the heating chipset can be controlled by adjusting the number of working chips, the working voltage, and the working current; the heating chipset is encapsulated inside the heating box 4, and a power supply plug is led out from the back of the heating box 4. Four fans 5 provided by the equipment are installed inside the heating box 4, and the fan speed is adjustable, which can be used to cool the heating box. A slot is reserved on the wall of the heating box, and the fins can be installed and removed. The number of detachable fins 6 is related to the cooling demand and can be used to increase the heat dissipation area of ​​the heating box. The upper surface of the heating box is close to the cold plate and can be fixed with bolts. An environmentally controlled air cooling channel 7 is reserved inside the cold plate, and the coolant flows through the channel to realize liquid cooling of the heating box. The left and right sides of the heating equipment housing are opened, and air inlet and air outlet channels are reserved for environmentally controlled air cooling. A heating device temperature measuring thermocouple 8 is also arranged on the surface of the device housing 9 to monitor the surface temperature of the device.

[0033] In some design cases, the heating chipset built into the heating box is composed of multiple heating chips (5 100W heating chips in this example). The rated heating power of the heating box can be directly adjusted by adjusting the number of working heating chips to simulate the heating conditions of typical equipment. For example, one heating chip works at 100W, two heating chips work at 200W, and the controllable power is 0~500W. In addition, the power of a single heating chip can be adjusted to 0~100W by adjusting the working voltage and working current of the heating chip.

[0034] When using the device proposed in the present invention to simulate the heating and cooling of typical cabin equipment, the simulated equipment is placed in a simulated cabin or a real cabin section when evaluating the heat dissipation solution. The cabin temperature measurement schematic diagram is shown in FIG. Figure 2 As shown, the cabin can provide cold air and coolant, the flow rate and temperature of the cold air and coolant are adjustable and monitorable, and the cabin temperature can be monitored by a thermocouple 10.

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

[0036] ①According to Figure 2 After the equipment is arranged, the heating power of the equipment is determined according to the typical equipment working conditions. 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 to simulate the heating conditions of typical equipment.

[0037] ② Select a cooling method and control the cooling amount. The optional cooling methods include:

[0038] a) Self-contained fin cooling mode, no coolant, no ventilation at the vents, self-contained fans turned off, heat dissipation through the equipment's own fins, and the cooling intensity of natural heat dissipation can be adjusted by disassembling and assembling the fins.

[0039] b) Self-contained fan cooling mode, no coolant, no ventilation at the vents, self-contained fan turned on, fins removed, and the cooling intensity of the self-contained fan adjusted by adjusting the fan power.

[0040] c) In environmentally controlled air cooling mode, no coolant is passed, ventilation is carried out at the vents, the built-in fan is turned off, the fins are removed, the environmentally controlled air cooling intensity is adjusted by adjusting the air volume and temperature at the vents, and the air cooling intensity is monitored by the flow temperature sensor.

[0041] d) Environmental control liquid cooling mode, coolant is passed, ventilation holes are blocked, built-in fans are turned off, fins are removed, and the intensity of environmental control liquid cooling is adjusted by adjusting the coolant flow and temperature, and the liquid cooling intensity is monitored by flow and temperature sensors.

[0042] ③ Determine whether the cooling control meets the onboard constraints. The onboard constraints include: if the onboard power supply is limited, the power of the built-in fan will be limited; if the onboard space or air bleed conditions cannot provide air cooling, then environmentally controlled air cooling cannot be used; if the onboard liquid cooling flow and temperature are limited, then the flow and temperature control of environmentally controlled liquid cooling will be limited; if the onboard constraints are met, proceed to the next step; if not, reselect the cooling method or adjust the cooling amount.

[0043] ④ Monitor the cabin temperature and equipment temperature through the temperature measuring thermocouples (8, 10) to determine whether the control requirements are met, such as the cabin temperature does not exceed 70°C, and the equipment temperature does not exceed 120°C. If both control targets are met, proceed to the next step; if not, reselect the cooling method or adjust the cooling amount.

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

[0045] ⑥ Determine whether all optional cooling method tests have been completed. If the test is completed, proceed to the next step. If not, reselect the cooling method and adjust the cooling amount.

[0046] ⑦ Compare the cooling method and cooling amount after the cabin temperature and equipment temperature control are completed, and provide the optimal cooling solution under a certain working condition according to the actual needs on board;

[0047] Finally, the cooling method evaluation method is used to give the recommended cooling methods under different heating conditions.

[0048] In the above implementation process and cases of the present invention, the heating power of the equipment can be adjusted by adjusting the number of working chips, working current, voltage, etc., to simulate the heating conditions of the equipment under different working conditions, and used for the research of equipment variable working conditions. The heating control method of the present invention is only an example, and the core lies in simulating different heating conditions of the equipment;

[0049] The simulation device proposed in the present invention has multiple cooling methods, including natural heat dissipation, equipment built-in fan heat dissipation, on-board environmentally controlled air cooling, liquid cooling, etc. The test system of the present invention is only an example, including but not limited to the above four cooling methods. The core is that a device can simulate the cooling effect evaluation of different cooling methods;

[0050] The temperature of the equipment can be monitored by thermocouples, and a set of evaluation processes can be used to evaluate the cooling effects of different cooling methods on the equipment and cabin temperature. The thermocouple monitoring method used in the present invention is only an example. The core is to evaluate the comprehensive impact of different cooling methods on the working temperature of the equipment under different working conditions and the cabin temperature, thereby correlating the heating and cooling of the equipment and providing an important basis for the formulation of cooling methods.

[0051] The above is only a specific embodiment of the present invention, and the present invention is described in detail. The unexplained part is a conventional technology. However, the protection scope of the present invention is not limited to this. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. The protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A device for simulating heating and cooling of typical equipment in a cabin, characterized in that: The device is composed of a cold plate, a heating chip, a fan, fins, an environmentally controlled air cooling channel, and a temperature measuring thermocouple. The heating chip is composed of a group of heating chips, and the heating chip group is encapsulated inside the heating box; multiple built-in fans are installed inside the heating box to cool the heating box; slots are reserved on the wall of the heating box for installing and removing fins to increase the heat dissipation area of ​​the heating box; a cold plate is arranged on the upper surface of the heating box, and a coolant channel is reserved inside the cold plate, through which the coolant flows to achieve liquid cooling of the heating box; the left and right sides of the heating box shell are opened, with air inlet and outlet channels reserved for environmentally controlled air cooling; temperature measuring thermocouples are also arranged on the surface of the heating box shell to monitor the surface temperature of the equipment.

2. A device for simulating heating and cooling of typical cabin equipment as claimed in claim 1, characterized in that: The heating power of the equipment is adjustable, and because it is equipped with heat dissipation fins, fans, cold plates, environmentally controlled air cooling channels, etc., it can simulate various cooling methods including natural heat dissipation, built-in fan heat dissipation, liquid cooling, and environmentally controlled air cooling.

3. A device for simulating heating and cooling of typical cabin equipment as claimed in claim 2, characterized in that: The working state of the equipment can be adjusted by adjusting the power of the equipment's heating chip and the number of working heating components, thereby simulating different heating powers of the equipment; the natural heat dissipation intensity of the equipment can be adjusted by adjusting the number of fins; the cooling mode of the equipment's built-in fan can be adjusted by adjusting the on / off and power of the equipment's fan; the liquid cooling mode of the equipment can be adjusted by adjusting the flow and temperature of the cold plate coolant; the environmentally controlled air cooling mode of the equipment can be adjusted by adjusting the air intake volume and temperature of the equipment's vents.

4. A device for simulating heating and cooling of typical cabin equipment as claimed in claim 3, characterized in that: Different cooling methods can be performed simultaneously to achieve coupled cooling.

5. A method for evaluating a cooling method using the device according to any one of claims 1 to 4, characterized in that: Under the constraints of the UAV cabin, the effects of the control quantities of different cooling methods on the equipment temperature and cabin temperature are evaluated, and a recommended cooling method and cooling amount evaluation method are given; the constraints such as cabin space and coolant flow limit are given by the actual situation on the aircraft, the cooling method control quantity refers to the control of coolant flow, temperature, fan power, number of fins, etc., the equipment temperature, cabin temperature, etc. are monitored by thermocouples, and the recommended cooling method is given by comparing the cooling method and cooling control quantity under the same control temperature.

6. The cooling mode evaluation method according to claim 5, characterized in that: When evaluating the cooling method, first arrange the heating and cooling equipment of typical equipment in the simulation cabin in the simulation cabin. The simulation cabin is equipped with thermocouples. 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 to simulate the heating conditions of typical equipment.

7. The cooling mode evaluation method according to claim 6, characterized in that: Select a cooling method and control the cooling amount. The optional cooling methods include: a) Self-contained fin cooling mode, no coolant, no ventilation at the vents, self-contained fans turned off, heat dissipated by the equipment's own fins, and the cooling intensity of natural heat dissipation can be adjusted by disassembling and assembling the fins; b) Self-contained fan cooling mode, no coolant, no ventilation at the vents, self-contained fan turned on, fins removed, and the cooling intensity of the self-contained fan was adjusted by adjusting the fan power; c) Environment-controlled air cooling mode, no coolant, ventilation at the vents, self-contained fans turned off, fins removed, and the intensity of environment-controlled air cooling adjusted by adjusting the air volume and temperature at the vents, and the intensity of air cooling monitored by flow and temperature sensors; d) Environmental control liquid cooling mode, coolant is passed, ventilation holes are blocked, built-in fans are turned off, fins are removed, and the intensity of environmental control liquid cooling is adjusted by adjusting the coolant flow and temperature, and the liquid cooling intensity is monitored by flow and temperature sensors.

8. The cooling mode evaluation method according to claim 7, characterized in that: Determine whether the cooling control meets the onboard constraints. The onboard constraints include: if the onboard power supply is limited, the power of the built-in fan is limited; if the onboard space or air bleed conditions limit air cooling, environmentally controlled air cooling cannot be used; if the onboard liquid cooling flow and temperature are limited, the flow and temperature control of environmentally controlled liquid cooling are limited; if the onboard constraints are met, proceed to the next step; if not, reselect the cooling method or adjust the cooling amount.

9. The cooling mode evaluation method according to claim 8, characterized in that: By measuring the cabin temperature with the thermocouple monitoring system on the simulation cabin and the device temperature with the thermocouple measuring system on the simulation device, it is determined whether the control requirements are met. If both control targets are met, proceed to the next step. If not, reselect the cooling method or adjust the cooling amount.

10. The cooling mode evaluation method according to claim 9, characterized in that: During the evaluation test, record the equipment power, cooling method, cooling amount setting, equipment temperature and cabin temperature to prepare for the selection of cooling method; Determine whether all optional cooling method tests are completed. If the test is completed, proceed to the next step. If not, reselect the cooling method and adjust the cooling amount. By comparing the cooling methods and cooling amounts after cabin temperature and equipment temperature control are completed, the optimal cooling solution under a certain working condition is given according to the actual needs on board; through the cooling method evaluation method, the recommended cooling methods under different heating conditions are given.

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